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PHILADELPHIA--( BUSINESS WIRE )--GSK plc (LSE/NYSE: GSK) today announced statistically significant and clinically meaningful overall survival (OS) results from Part 1 and progression-free survival (PFS) results from Part 2 of the RUBY/ENGOT-EN6/GOG3031/NSGO phase III trial in adult patients with primary advanced or recurrent endometrial cancer. These data were presented today in a late-breaking plenary session at the Society of Gynecologic Oncology 2024 Annual Meeting on Women’s Cancer (March 16-18). The goal of the RUBY phase III trial program is to evaluate which patients with primary advanced or recurrent endometrial cancer could potentially benefit from treatment with Jemperli (dostarlimab-gxly) plus chemotherapy, with or without the addition of Zejula (niraparib) maintenance. Part 1 of the RUBY phase III trial is investigating dostarlimab-gxly plus standard-of-care chemotherapy (carboplatin-paclitaxel) followed by dostarlimab-gxly compared to chemotherapy plus placebo followed by placebo. Part 2 of the RUBY phase III trial is evaluating dostarlimab-gxly plus standard-of-care chemotherapy, followed by dostarlimab-gxly plus niraparib as maintenance therapy compared to chemotherapy plus placebo followed by placebo. The safety and tolerability profiles of dostarlimab-gxly plus carboplatin-paclitaxel and dostarlimab-gxly plus carboplatin-paclitaxel followed by dostarlimab-glxy plus niraparib were generally consistent with the known safety profiles of the individual medicines. Previous data showed a statistically significant and clinically meaningful improvement in PFS with Jemperli plus chemotherapy versus chemotherapy alone in frontline mismatch repair deficient (dMMR)/microsatellite instability-high (MSI-H) primary advanced or recurrent endometrial cancer. These data led to regulatory approvals for this patient population in the US, EU and certain other countries. Data presented today show additional potential benefit of dostarlimab-gxly plus chemotherapy, with or without the addition of niraparib, in the overall population of patients with primary advanced or recurrent endometrial cancer, including patients with mismatch repair proficient (MMRp)/microsatellite stable (MSS) tumors, for which there are currently no approved immuno-therapy-based regimens. Hesham Abdullah, Senior Vice President, Global Head Oncology, R&D, GSK said : “ The positive data presented today further show how dostarlimab-gxly-based regimens could benefit a broader set of patients with endometrial cancer. The results we’ve seen to date comprise the growing body of evidence supporting the role of dostarlimab-gxly as the backbone of our immuno-oncology development program. Our goal is to continue to identify ways to use dostarlimab-gxly alone and in combination with other therapies to help improve outcomes for patients with limited treatment options.” RUBY Part 1: a statistically significant and clinically meaningful improvement in OS was observed for dostarlimab-gxly plus chemotherapy versus placebo plus chemotherapy, meeting a primary endpoint of the study. Dostarlimab-gxly plus chemotherapy versus chemotherapy alone showed: In the overall population: a statistically significant reduction in the risk of death by 31% (Hazard Ratio [HR]: 0.69; [95% CI: 0.539–0.890]) a clinically meaningful improvement of 16.4 months in median OS (44.6 months vs 28.2 months) In a prespecified exploratory analysis of the MMRp/MSS population: a clinically meaningful trend in reduced risk of death by 21% (HR: 0.79; [95% CI: 0.602–1.044]) a clinically meaningful improvement of seven months in median OS (34.0 months vs 27.0 months) Full OS summaries are shown below. dostarlimab-gxly + carboplatin-paclitaxel placebo + carboplatin-paclitaxel Overall population, Number (N) 245 249 OS, HR (95% CI) 0.69 (0.539–0.890) P -value 1 0.002 OS, median (95% CI), mo. 44.6 (32.6–NR) 28.2 (22.1–35.6) dMMR/MSI-H population 2 , N 53 65 OS, HR (95% CI) 0.32 (0.166–0.629) OS, median 3 (95% CI), mo. NR (NR–NR) 31.4 (20.3–NR) MMRp/MSS2, N 192 184 OS, HR (95% CI) 0.79 (0.602–1.044) OS, median (95% CI), mo. 34.0 (28.6–NR) 27.0 (21.5–35.6) 1 One-sided p-value based on stratified log-rank test. 2 Exploratory analyses of OS in dMMR/MSI-H and OS in MMRp/MSS populations were pre-specified with no planned hypothesis testing. 3 Although the median OS was not reached, at 30 months the estimated reduction in the risk of death was 82.8% for patients who received dostarlimab plus chemotherapy vs. 54.1% for patients who received chemotherapy alone. Matthew Powell, MD, Division of Gynecologic Oncology, Washington University School of Medicine, and US principal investigator of the RUBY trial said: “ RUBY Part 1 is the first clinical trial to show a statistically significant and clinically meaningful improvement in overall survival for an immuno-oncology therapy in combination with chemotherapy in the overall population of patients with primary advanced or recurrent endometrial cancer. As a clinician, I celebrate the results of the RUBY Part 1 trial presented today, which show how dostarlimab-gxly added to chemotherapy could potentially benefit a broader set of patients with this type of cancer.” In RUBY Part 1, grade 3 or higher and serious treatment-emergent adverse events (AEs) were approximately 12% higher in the dostarlimab-gxly plus carboplatin-paclitaxel arm (treatment arm) compared with the placebo plus carboplatin-paclitaxel arm (control arm). The nature and types of immune-related AEs in the dostarlimab-gxly plus chemotherapy safety profile were consistent with the mechanism of action of dostarlimab-gxly and similar to those reported for other PD-(L)1 inhibitors. In the trial, 40.7% of participants in the treatment arm and 16.3% of participants in the control arm had immune-related AEs assessed by the investigator as related to dostarlimab-gxly or placebo, respectively. Discontinuation of dostarlimab-gxly or placebo due to a treatment-emergent AE occurred in 19.1% of patients in the treatment arm and 8.1% of patients in the control arm. GSK expects US Food and Drug Administration regulatory submission acceptance based on RUBY Part 1 data for an expanded indication in the overall population in the first half of this year. RUBY Part 2: addition of niraparib to dostarlimab-gxly in maintenance setting significantly improved PFS in first-line primary advanced or recurrent endometrial cancer compared to chemotherapy alone, meeting the primary endpoint of the trial. Dostarlimab-gxly plus chemotherapy followed by dostarlimab-gxly plus niraparib compared to placebo plus chemotherapy followed by placebo showed: In the overall population: a statistically significant reduction in the risk of disease progression or death by 40% (HR: 0.60 [95% CI: 0.43–0.82]) a clinically meaningful improvement of 6.2 months in median PFS (14.5 months vs 8.3 months) In the MMRp/MSS population: a statistically significant reduction in the risk of disease progression or death by 37% (HR: 0.63 [95% CI: 0.44–0.91]) a clinically meaningful improvement of 6.0 months in median PFS (14.3 months vs 8.3 months) Dr Mansoor Raza Mirza, Chief Oncologist, Copenhagen University Hospital, Denmark, and RUBY principal investigator said : “ In RUBY Part 2, we observed that the use of dostarlimab-gxly in combination with niraparib in the maintenance therapy setting further improved progression-free survival versus placebo for patients with primary advanced or recurrent endometrial cancer. These findings are particularly important for patients who have MMRp/MSS tumors as the data help build on the initial benefit observed with an immuno-oncology plus chemotherapy regimen, reflecting the potential for the addition of niraparib maintenance to address unmet medical need for these patients.” In RUBY Part 2, grade 3 or higher and serious treatment-emergent AEs were approximately 36% and 24% higher, respectively, in the dostarlimab-gxly plus chemotherapy followed by dostarlimab-gxly plus niraparib arm (treatment arm) compared with the placebo plus chemotherapy followed by placebo arm (control arm). In the trial, 36.6% of participants in the treatment arm and 6.3% of participants in the control arm had immune-related AEs assessed by the investigator as related to dostarlimab-gxly or placebo, respectively. No cases of myelodysplastic syndrome/acute myeloid leukemia were reported; other secondary primary malignancies occurred in 1 patient each in both treatment arms. Discontinuation of dostarlimab-gxly or placebo due to a TEAE occurred in 24.1% of patients in the treatment arm and 5.2% of patients in the control arm. Discontinuation of niraparib or placebo due to a treatment-emergent AE occurred in 15.7% of patients in the treatment arm and 4.2% of patients in the control arm. About endometrial cancer Endometrial cancer is found in the inner lining of the uterus, known as the endometrium. Endometrial cancer is the most common gynecologic cancer in developed countries, with approximately 417,000 new cases reported each year worldwide 1 , and incidence rates are expected to rise by almost 40% between 2020 and 2040. 2,3 Approximately 15-20% of patients with endometrial cancer will be diagnosed with advanced disease at the time of diagnosis. 4 About RUBY RUBY is a two-part global, randomized, double-blind, multicenter phase III trial of patients with primary advanced or recurrent endometrial cancer. Part 1 is evaluating dostarlimab-gxly plus carboplatin-paclitaxel followed by dostarlimab-gxly versus carboplatin-paclitaxel plus placebo followed by placebo. Part 2 is evaluating dostarlimab-gxly plus carboplatin-paclitaxel followed by dostarlimab-gxly plus niraparib versus placebo plus carboplatin-paclitaxel followed by placebo. In Part 1, the dual-primary endpoints are investigator-assessed PFS based on the Response Evaluation Criteria in Solid Tumors v1.1 and OS. The statistical analysis plan included pre-specified analyses of PFS in the dMMR/MSI-H and overall populations and OS in the overall population. Pre-specified exploratory analyses of PFS and OS in the MMRp/MSS population and OS in the dMMR/MSI-H populations were also performed. RUBY Part 1 included a broad population, including histologies often excluded from clinical trials and had approximately 10% of patients with carcinosarcoma and 20% with serous carcinoma. In Part 2, the primary endpoint is investigator-assessed PFS in the overall population, followed by PFS in the MMRp/MSS population, and OS in the overall population is a key secondary endpoint. Additional secondary endpoints in Part 1 and Part 2 include PFS per blinded independent central review, PFS2, overall response rate, duration of response, disease control rate, patient-reported outcomes, and safety and tolerability. RUBY is part of an international collaboration between the European Network of Gynaecological Oncological Trial groups (ENGOT), a research network of the European Society of Gynaecological Oncology (ESGO) that consists of 22 trial groups from 31 European countries that perform cooperative clinical trials, and the GOG Foundation, a non-profit organization dedicated to transforming the standard of care in gynecologic oncology. About Jemperli (dostarlimab-gxly) Jemperli is a programmed death receptor-1 (PD-1)-blocking antibody that binds to the PD-1 receptor and blocks its interaction with the PD-1 ligands PD-L1 and PD-L2. 5 Jemperli was discovered by AnaptysBio, Inc. and licensed to TESARO, Inc., under a collaboration and exclusive license agreement signed in March 2014. Under this agreement, GSK is responsible for the ongoing research, development, commercialization, and manufacturing of Jemperli , and cobolimab (GSK4069889), a TIM-3 antagonist. Indications and Important Safety Information for JEMPERLI (dostarlimab-gxly) JEMPERLI, in combination with carboplatin and paclitaxel, followed by JEMPERLI as a single agent, is indicated for the treatment of adult patients with primary advanced or recurrent endometrial cancer (EC) that is mismatch repair deficient (dMMR), as determined by an FDA-approved test, or microsatellite instability-high (MSI-H). JEMPERLI, as a single agent, is indicated for the treatment of adult patients with dMMR recurrent or advanced: EC, as determined by an FDA-approved test, that has progressed on or following prior treatment with a platinum-containing regimen in any setting and are not candidates for curative surgery or radiation, or solid tumors, as determined by an FDA-approved test, that have progressed on or following prior treatment and who have no satisfactory alternative treatment options. This indication is approved under accelerated approval based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s). Important Safety Information Severe and Fatal Immune-Mediated Adverse Reactions Immune-mediated adverse reactions, which can be severe or fatal, can occur in any organ system or tissue and can occur at any time during or after treatment with a PD-1/PD-L1–blocking antibody, including JEMPERLI. Monitor closely for signs and symptoms of immune-mediated adverse reactions. Evaluate liver enzymes, creatinine, and thyroid function tests at baseline and periodically during treatment. For suspected immune-mediated adverse reactions, initiate appropriate workup to exclude alternative etiologies, including infection. Institute medical management promptly, including specialty consultation as appropriate. Based on the severity of the adverse reaction, withhold or permanently discontinue JEMPERLI. In general, if JEMPERLI requires interruption or discontinuation, administer systemic corticosteroids (1 to 2 mg/kg/day prednisone or equivalent) until improvement to ≤Grade 1. Upon improvement to ≤Grade 1, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose immune-mediated adverse reaction is not controlled with corticosteroids. Immune-Mediated Pneumonitis JEMPERLI can cause immune-mediated pneumonitis, which can be fatal. In patients treated with other PD-1/PD-L1–blocking antibodies, the incidence of pneumonitis is higher in patients who have received prior thoracic radiation. Pneumonitis occurred in 2.3% (14/605) of patients, including Grade 2 (1.3%), Grade 3 (0.8%), and Grade 4 (0.2%) pneumonitis. Immune-Mediated Colitis Colitis occurred in 1.3% (8/605) of patients, including Grade 2 (0.7%) and Grade 3 (0.7%) adverse reactions. Cytomegalovirus infection/reactivation have occurred in patients with corticosteroid-refractory immune-mediated colitis. In such cases, consider repeating infectious workup to exclude alternative etiologies. Immune-Mediated Hepatitis JEMPERLI can cause immune-mediated hepatitis, which can be fatal. Grade 3 hepatitis occurred in 0.5% (3/605) of patients. Immune-Mediated Endocrinopathies Adrenal Insufficiency Adrenal insufficiency occurred in 1.2% (7/605) of patients, including Grade 2 (0.5%) and Grade 3 (0.7%). For Grade 2 or higher adrenal insufficiency, initiate symptomatic treatment per institutional guidelines, including hormone replacement as clinically indicated. Withhold or permanently discontinue JEMPERLI depending on severity. Hypophysitis JEMPERLI can cause immune-mediated hypophysitis. Grade 3 hypophysitis occurred in 0.4% (1/241) of patients receiving JEMPERLI in combination with carboplatin and paclitaxel. Grade 2 hypophysitis occurred in 0.2% (1/605) of patients receiving JEMPERLI as a single agent. Initiate hormone replacement as clinically indicated. Withhold or permanently discontinue JEMPERLI depending on severity. Thyroid Disorders Grade 2 thyroiditis occurred in 0.5% (3/605) of patients. Grade 2 hypothyroidism occurred in 12% (28/241) of patients receiving JEMPERLI in combination with carboplatin and paclitaxel. Grade 2 hypothyroidism occurred in 8% (46/605) of patients receiving JEMPERLI as a single agent. Hyperthyroidism occurred in 3.3% (8/241) of patients receiving JEMPERLI in combination with carboplatin and paclitaxel, including Grade 2 (2.9%) and Grade 3 (0.4%). Hyperthyroidism occurred in 2.3% (14/605) of patients receiving JEMPERLI as a single agent, including Grade 2 (2.1%) and Grade 3 (0.2%). Initiate thyroid hormone replacement or medical management of hyperthyroidism as clinically indicated. Withhold or permanently discontinue JEMPERLI depending on severity. Type 1 Diabetes Mellitus, Which Can Present with Diabetic Ketoacidosis JEMPERLI can cause type 1 diabetes mellitus, which can present with diabetic ketoacidosis. Grade 3 type 1 diabetes mellitus occurred in 0.4% (1/241) of patients receiving JEMPERLI in combination with carboplatin and paclitaxel. Grade 3 type 1 diabetes mellitus occurred in 0.2% (1/605) of patients receiving JEMPERLI as a single agent. Monitor patients for hyperglycemia or other signs and symptoms of diabetes. Initiate treatment with insulin as clinically indicated. Withhold or permanently discontinue JEMPERLI depending on severity. Immune-Mediated Nephritis with Renal Dysfunction JEMPERLI can cause immune-mediated nephritis, which can be fatal. Grade 2 nephritis, including tubulointerstitial nephritis, occurred in 0.5% (3/605) of patients. Immune-Mediated Dermatologic Adverse Reactions JEMPERLI can cause immune-mediated rash or dermatitis. Bullous and exfoliative dermatitis, including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), and drug rash with eosinophilia and systemic symptoms (DRESS), have occurred with PD-1/PD-L1–blocking antibodies. Topical emollients and/or topical corticosteroids may be adequate to treat mild to moderate non-bullous/exfoliative rashes. Withhold or permanently discontinue JEMPERLI depending on severity. Other Immune-Mediated Adverse Reactions The following clinically significant immune-mediated adverse reactions occurred in <1% of the 605 patients treated with JEMPERLI or were reported with the use of other PD-1/PD-L1–blocking antibodies. Severe or fatal cases have been reported for some of these adverse reactions. Nervous System: Meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis, Guillain-Barré syndrome, nerve paresis, autoimmune neuropathy Cardiac/Vascular: Myocarditis, pericarditis, vasculitis Ocular: Uveitis, iritis, other ocular inflammatory toxicities. Some cases can be associated with retinal detachment. Various grades of visual impairment to include blindness can occur Gastrointestinal: Pancreatitis, including increases in serum amylase and lipase levels, gastritis, duodenitis Musculoskeletal and Connective Tissue: Myositis/polymyositis, rhabdomyolysis and associated sequelae including renal failure, arthritis, polymyalgia rheumatica Endocrine: Hypoparathyroidism Other (Hematologic/Immune): Autoimmune hemolytic anemia, aplastic anemia, hemophagocytic lymphohistiocytosis, systemic inflammatory response syndrome, histiocytic necrotizing lymphadenitis (Kikuchi lymphadenitis), sarcoidosis, immune thrombocytopenia, solid organ transplant rejection, other transplant (including corneal graft) rejection Infusion-Related Reactions Severe or life-threatening infusion-related reactions have been reported with PD-1/PD-L1–blocking antibodies. Severe infusion-related reactions (Grade 3) occurred in 0.2% (1/605) of patients receiving JEMPERLI. Monitor patients for signs and symptoms of infusion-related reactions. Interrupt or slow the rate of infusion or permanently discontinue JEMPERLI based on severity of reaction. Complications of Allogeneic HSCT Fatal and other serious complications can occur in patients who receive allogeneic hematopoietic stem cell transplantation (HSCT) before or after treatment with a PD-1/PD-L1–blocking antibody, which may occur despite intervening therapy. Monitor patients closely for transplant-related complications and intervene promptly. Embryo-Fetal Toxicity and Lactation Based on its mechanism of action, JEMPERLI can cause fetal harm. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with JEMPERLI and for 4 months after their last dose. Because of the potential for serious adverse reactions from JEMPERLI in a breastfed child, advise women not to breastfeed during treatment with JEMPERLI and for 4 months after their last dose. Common Adverse Reactions The most common adverse reactions (≥20%) in patients with dMMR/MSI-H EC who received JEMPERLI in combination with carboplatin and paclitaxel were rash, diarrhea, hypothyroidism, and hypertension. The most common Grade 3 or 4 laboratory abnormalities (≥10%) were decreased neutrophils, decreased hemoglobin, decreased white blood cell count, decreased lymphocytes, increased glucose, decreased sodium, and decreased platelets. The most common adverse reactions (≥20%) in patients with dMMR EC who received JEMPERLI as a single agent were fatigue/asthenia, anemia, nausea, diarrhea, constipation, vomiting, and rash. The most common Grade 3 or 4 laboratory abnormalities (>2%) were decreased lymphocytes, decreased sodium, increased alanine aminotransferase, increased creatinine, decreased neutrophils, decreased albumin, and increased alkaline phosphatase. The most common adverse reactions (≥20%) in patients with dMMR solid tumors who received JEMPERLI as a single agent were fatigue/asthenia, anemia, diarrhea, and nausea. The most common Grade 3 or 4 laboratory abnormalities (≥2%) were decreased lymphocytes, decreased sodium, increased alkaline phosphatase, and decreased albumin. Please see the full US Prescribing Information for JEMPERLI . About Zejula (niraparib) Zejula is an oral, once-daily poly(ADP-ribose) polymerase (PARP) inhibitor. Indication and Important Safety Information for ZEJULA (niraparib) ZEJULA (niraparib) tablets 100 mg/200 mg/300 mg are indicated: for first-line maintenance treatment of adult patients with advanced epithelial ovarian, fallopian tube, or primary peritoneal cancer who are in a complete or partial response to first-line platinum-based chemotherapy for the maintenance treatment of adult patients with deleterious or suspected deleterious germline BRCA- mutated recurrent epithelial ovarian, fallopian tube, or primary peritoneal cancer who are in a complete or partial response to platinum-based chemotherapy. Select patients for therapy based on an FDA-approved companion diagnostic for ZEJULA Important Safety Information Myelodysplastic syndrome/acute myeloid leukemia (MDS/AML), including cases with a fatal outcome, have been reported in patients who received ZEJULA. In PRIMA, MDS/AML occurred in 6 out of 484 (1.2%) patients treated with ZEJULA, and in 3 out of 244 (1.2%) patients treated with placebo. The duration of therapy with ZEJULA in patients who developed secondary MDS/cancer therapy-related AML varied from 3.7 months to 2.5 years. In NOVA , of patients within the g BRCA mut cohort, MDS/AML occurred in 10 out of 136 (7%) patients treated with ZEJULA and in 2 out of 65 (3%) patients treated with placebo. The duration of therapy with ZEJULA in patients who developed secondary MDS/cancer therapy-related AML varied from 3.6 months to 5.9 years. All patients who developed secondary MDS/cancer therapy-related AML had received previous chemotherapy with platinum agents and/or other DNA-damaging agents, including radiotherapy. For suspected MDS/AML or prolonged hematological toxicities, refer the patient to a hematologist for further evaluation. Discontinue ZEJULA if MDS/AML is confirmed. Hematologic adverse reactions (thrombocytopenia, anemia, neutropenia, and/or pancytopenia) have been reported in patients receiving ZEJULA. The overall incidence of Grade ≥3 thrombocytopenia, anemia, and neutropenia were reported, respectively, in 39%, 31%, and 21% of patients receiving ZEJULA in PRIMA and 29%, 25%, and 20% of patients receiving ZEJULA in NOVA. Discontinuation due to thrombocytopenia, anemia, and neutropenia occurred, respectively, in 4%, 2%, and 2% of patients in PRIMA and 3%, 1%, and 2% of patients in NOVA. In patients who were administered a starting dose of ZEJULA based on baseline weight or platelet count in PRIMA, Grade ≥3 thrombocytopenia, anemia, and neutropenia were reported, respectively, in 22%, 23%, and 15% of patients receiving ZEJULA. Discontinuation due to thrombocytopenia, anemia, and neutropenia occurred, respectively, in 3%, 3%, and 2% of patients. Do not start ZEJULA until patients have recovered from hematological toxicity caused by prior chemotherapy (≤Grade 1). Monitor complete blood counts weekly for the first month, monthly for the next 11 months, and periodically thereafter. If hematological toxicities do not resolve within 28 days following interruption, discontinue ZEJULA, and refer the patient to a hematologist for further investigations. Hypertension and hypertensive crisis have been reported in patients receiving ZEJULA. Grade 3-4 hypertension occurred in 6% of patients receiving ZEJULA vs 1% of patients receiving placebo in PRIMA, with no reported discontinuations. Grade 3-4 hypertension occurred in 9% of patients receiving ZEJULA vs 2% of patients receiving placebo in NOVA, with discontinuation occurring in <1% of patients. Monitor blood pressure and heart rate at least weekly for the first two months, then monthly for the first year, and periodically thereafter during treatment with ZEJULA. Closely monitor patients with cardiovascular disorders, especially coronary insufficiency, cardiac arrhythmias, and hypertension. Manage hypertension with antihypertensive medications and adjustment of the ZEJULA dose if necessary. Posterior reversible encephalopathy syndrome (PRES) occurred in 0.1% of 2,165 patients treated with ZEJULA in clinical trials and has also been described in postmarketing reports. Monitor all patients for signs and symptoms of PRES, which include seizure, headache, altered mental status, visual disturbance, or cortical blindness, with or without associated hypertension. Diagnosis requires confirmation by brain imaging. If suspected, promptly discontinue ZEJULA and administer appropriate treatment. The safety of reinitiating ZEJULA is unknown. Embryo-fetal toxicity and lactation: Based on its mechanism of action, ZEJULA can cause fetal harm. Advise females of reproductive potential of the potential risk to a fetus and to use effective contraception during treatment and for 6 months after receiving their final dose of ZEJULA. Because of the potential for serious adverse reactions from ZEJULA in breastfed infants, advise lactating women not to breastfeed during treatment with ZEJULA and for 1 month after receiving the last dose. First-line Maintenance Advanced Ovarian Cancer Most common adverse reactions (Grades 1-4) in ≥10% of all patients who received ZEJULA in PRIMA were thrombocytopenia (66%), anemia (64%), nausea (57%), fatigue (51%), neutropenia (42%), constipation (40%), musculoskeletal pain (39%), leukopenia (28%), headache (26%), insomnia (25%), vomiting (22%), dyspnea (22%), decreased appetite (19%), dizziness (19%), cough (18%), hypertension (18%), AST/ALT elevation (14%), and acute kidney injury (12%). Common lab abnormalities (Grades 1-4) in ≥25% of all patients who received ZEJULA in PRIMA included: decreased hemoglobin (87%), decreased platelets (74%), decreased leukocytes (71%), increased glucose (66%), decreased neutrophils (66%), decreased lymphocytes (51%), increased alkaline phosphatase (46%), increased creatinine (40%), decreased magnesium (36%), increased AST (35%), and increased ALT (29%). Maintenance Recurrent Germline BRCA -mutated Ovarian Cancer Most common adverse reactions (Grades 1-4) in ≥10% of patients who received ZEJULA in NOVA g BRCA mut Cohort were nausea (77%), thrombocytopenia (71%), fatigue (61%), anemia (52%), vomiting (40%), constipation (38%), headache (35%), neutropenia (31%), decreased appetite (22%), hypertension (21%), insomnia (18%), dizziness (18%), dyspnea (17%), dyspepsia (17%), back pain (16%), cough (16%), nasopharyngitis (13%), dry mouth (13%), dysgeusia (13%), urinary tract infection (11%), rash (10%), and anxiety (10%). Common lab abnormalities (Grades 1-4) in ≥25% of patients who received ZEJULA in NOVA g BRCA mut Cohort included: decrease in hemoglobin (85%), decrease in platelet count (81%), decrease in white blood cell count (71%), decrease in absolute neutrophil count (56%), increase in AST (35%), and increase in ALT (25%). Please see the US Prescribing Information for ZEJULA tablets. GSK in oncology Oncology is an emerging therapeutic area for GSK where we are committed to maximizing patient survival with a current focus on hematologic malignancies, gynecologic cancers and other solid tumors through breakthroughs in immuno-oncology and tumor-cell targeting therapies. About GSK GSK is a global biopharma company with a purpose to unite science, technology, and talent to get ahead of disease together. Find out more at us.gsk.com. Cautionary statement regarding forward-looking statements GSK cautions investors that any forward-looking statements or projections made by GSK, including those made in this announcement, are subject to risks and uncertainties that may cause actual results to differ materially from those projected. Such factors include, but are not limited to, those described under Item 3.D “Risk factors” in the company's Annual Report on Form 20-F for 2023. Registered in England & Wales: No. 3888792 Registered Office: 980 Great West Road Brentford, Middlesex TW8 9GS References Faizan U, Muppidi V. Uterine Cancer. [Updated 2022 Sep 5]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. Available at: www.ncbi.nlm.nih.gov/books/NBK562313/ . Braun MM, et al. Am Fam Physician. 2016;93(6):468-474. International Research on Cancer. Global Cancer Observatory. Cancer Tomorrow. gco.iarc.fr/tomorrow/en/dataviz/ . Accessed 13 July 2022. CMP: CancerMPact® Patient Metrics Mar-2023, Cerner Enviza. Available at www.cancermpact.com . Accessed 29 Feb 2024. Laken H, Kehry M, Mcneeley P, et al. Identification and characterization of TSR-042, a novel anti-human PD-1 therapeutic antibody. European Journal of Cancer. 2016;69, S102. doi:10.1016/s0959-8049(16)32902-1.

Interchangeability study for HADLIMA (adalimumab-bwwd) was conducted in accordance with the FDA’s Guidance for Industry; primary pharmacokinetics (PK) endpoints as well as efficacy, safety and immunogenicity profiles were comparable between switching group and continuous reference product Humira group 52-week results from SB17 Phase 3 study demonstrated long-term efficacy, safety, and immunogenicity of SB17 compared to reference ustekinumab, including switching from ustekinumab to SB17 INCHEON, Korea, March 09, 2024 (GLOBE NEWSWIRE) -- Samsung Bioepis Co., Ltd. presented two new study results for its immunology portfolio – SB5, a biosimilar to Humira1 (adalimumab), and SB17, a proposed biosimilar to Stelara2 (ustekinumab) – at the 2024 American Academy of Dermatology (AAD) Annual Meeting being held from March 8 to 12 in San Diego, California, United States. “We are excited to present new clinical data for our immunology portfolio at AAD Annual Meeting. We will continue to work towards generating robust scientific evidence that demonstrate comparable efficacy and safety of biosimilars to reference products, including data for switching from reference products to biosimilars,” said Ilsun Hong, Vice President, Production Evaluation Team Leader of Samsung Bioepis. SB5, approved by the U.S. Food and Drug Administration (FDA) under the brand name HADLIMA™ (adalimumab-bwwd) as a biosimilar to Humira, is being reviewed by the FDA as an interchangeable biosimilar to Humira based on the Phase 4 study results. The Phase 4 randomized, double-blind, parallel-group, multiple-dose, active comparator, multicenter study (NCT05510063) assessed pharmacokinetics (PK), efficacy, safety, and immunogenicity in two treatment groups of adult patients with moderate to severe plaque psoriasis: patients who switched between reference product Humira and the high-concentration formulation SB5 (40 mg/0.4 mL) versus those receiving reference product continuously. The interchangeability study met primary endpoints of AUCtau (week 23-25) and Cmax (week 23-25), demonstrating comparability between the switching group and continuous reference product treatment group. Other endpoints including efficacy, safety, and immunogenicity were also comparable. SB5 was first approved by the FDA in July 2019 under the brand name HADLIMA (adalimumab-bwwd) as a low-concentration (40 mg/0.8 mL) formulation of prefilled syringe and prefilled autoinjector. The high-concentration (40 mg/0.4 mL) formulation of prefilled syringe and prefilled autoinjector of HADLIMA was approved in August 2022. HADLIMA was introduced into the U.S. commercial market on July 1, 2023 and is marketed by Organon. In addition, Samsung Bioepis presented the final 52-week results from the Phase 3 study for SB17, comparing the long-term efficacy, safety, and immunogenicity between three treatment groups: SB17-treated group, reference ustekinumab-treated group, and switched group from reference ustekinumab to SB17 at Week 28. The study showed that efficacy, safety, and immunogenicity between the three arms were comparable up to Week 52. SB17 was recommended for approval by the European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) in February 2024 under the brand name PYZCHIVA™. In the United States, the Biologics License Application (BLA) for SB17 is under review by the FDA. If approved, SB17 will be commercialized by Sandoz in Europe and the U.S. Details of the Samsung Bioepis’ abstracts are as follows: Presentation TitlePresentation DetailsInterchangeability of SB5 and Adalimumab Reference Product in Patients with Moderate to Severe Chronic Plaque PsoriasisSession: PosterExhibit Date/Time: March 8-9th, 2024, 8:30 AM – 5:00 PMAbstract Number: 50522Authors: Steven R. Feldman, Skaidra Valiukevičienė, Grazyna Pulka, Elzbieta Krolikowska, Pawel Brzewski, Malgorzata Janczylo-Jankowska, Bartlomiej Kwiek, Lidia Rajzer, Soyeon Kim, Yumin Baek, Hyuna LeeClinical Similarity of SB17 (Proposed Ustekinumab Biosimilar) to Reference Ustekinumab in Patients with Moderate to Severe Plaque Psoriasis: Randomized, Double-blind, Phase III, 52-Week ResultsSession: PosterExhibit Date/Time: March 8-9th, 2024, 8:30 AM – 5:00 PMAbstract Number: 49140Authors: Steven R. Feldman, Joanna Narbutt, Giampiero Girolomoni, Jan Brzezicki, Nataliya Reznichenko, Maria Agnieszka Zegadlo-Mylik, Grazyna Pulka, Magdalena Dmowska-Stecewicz, Jiyoon Lee, Minkyung Lee, Young Hee Rho About HADLIMA (adalimumab-bwwd) Injection 40 mg/0.4 mL and 40 mg/0.8mL HADLIMA is a tumor necrosis factor (TNF) blocker indicated for: Rheumatoid Arthritis: HADLIMA is indicated, alone or in combination with methotrexate or other non-biologic disease-modifying antirheumatic drugs (DMARDs), for reducing signs and symptoms, inducing major clinical response, inhibiting the progression of structural damage, and improving physical function in adult patients with moderately to severely active rheumatoid arthritis. Juvenile Idiopathic Arthritis: HADLIMA is indicated, alone or in combination with methotrexate, for reducing signs and symptoms of moderately to severely active polyarticular juvenile idiopathic arthritis in patients 2 years of age and older. Psoriatic Arthritis: HADLIMA is indicated, alone or in combination with non-biologic DMARDs, for reducing signs and symptoms, inhibiting the progression of structural damage, and improving physical function in adult patients with active psoriatic arthritis. Ankylosing Spondylitis: HADLIMA is indicated for reducing signs and symptoms in adult patients with active ankylosing spondylitis. Crohn’s Disease: HADLIMA is indicated for the treatment of moderately to severely active Crohn’s disease in adults and pediatric patients 6 years of age and older. Ulcerative Colitis: HADLIMA is indicated for the treatment of moderately to severely active ulcerative colitis in adult patients.Limitations of Use:The effectiveness of HADLIMA has not been established in patients who have lost response to or were intolerant to tumor necrosis factor (TNF) blockers. Plaque Psoriasis: HADLIMA is indicated for the treatment of adult patients with moderate to severe chronic plaque psoriasis who are candidates for systemic therapy or phototherapy, and when other systemic therapies are medically less appropriate. HADLIMA should only be administered to patients who will be closely monitored and have regular follow-up visits with a physician. Hidradenitis Suppurativa: HADLIMA is indicated for the treatment of moderate to severe hidradenitis suppurativa in adult patients. Uveitis: HADLIMA is indicated for the treatment of non-infectious intermediate, posterior, and panuveitis in adult patients. SELECTED SAFETY INFORMATION SERIOUS INFECTIONS Patients treated with adalimumab products, including HADLIMA, are at increased risk for developing serious infections that may lead to hospitalization or death. Most patients who developed these infections were taking concomitant immunosuppressants such as methotrexate or corticosteroids. Discontinue HADLIMA if a patient develops a serious infection or sepsis. Reported infections include: Active tuberculosis (TB), including reactivation of latent TB. Patients with TB have frequently presented with disseminated or extrapulmonary disease. Test patients for latent TB before HADLIMA use and during therapy. Initiate treatment for latent TB prior to HADLIMA use. Invasive fungal infections, including histoplasmosis, coccidioidomycosis, candidiasis, aspergillosis, blastomycosis, and pneumocystosis. Patients with histoplasmosis or other invasive fungal infections may present with disseminated, rather than localized, disease. Antigen and antibody testing for histoplasmosis may be negative in some patients with active infection. Consider empiric anti-fungal therapy in patients at risk for invasive fungal infections who develop severe systemic illness. Bacterial, viral, and other infections due to opportunistic pathogens, including Legionella and Listeria. Carefully consider the risks and benefits of treatment with HADLIMA prior to initiating therapy in patients: with chronic or recurrent infection who have been exposed to TB with a history of opportunistic infection who resided in or traveled in regions where mycoses are endemic with underlying conditions that may predispose them to infection Monitor patients closely for the development of signs and symptoms of infection during and after treatment with HADLIMA, including the possible development of TB in patients who tested negative for latent TB infection prior to initiating therapy. Do not start HADLIMA during an active infection, including localized infections. Patients older than 65 years, patients with co-morbid conditions, and/or patients taking concomitant immunosuppressants may be at greater risk of infection. If an infection develops, monitor carefully and initiate appropriate therapy. Drug interactions with biologic products: A higher rate of serious infections has been observed in rheumatoid arthritis (RA) patients treated with rituximab who received subsequent treatment with a TNF blocker. An increased risk of serious infections has been seen with the combination of TNF blockers with anakinra or abatacept, with no demonstrated added benefit in patients with RA. Concomitant administration of HADLIMA with other biologic DMARDs (eg, anakinra or abatacept) or other TNF blockers is not recommended based on the possible increased risk for infections and other potential pharmacological interactions. MALIGNANCY Lymphoma and other malignancies, some fatal, have been reported in children and adolescent patients treated with TNF blockers, including adalimumab products. Postmarketing cases of hepatosplenic T-cell lymphoma (HSTCL), a rare type of T-cell lymphoma, have been reported in patients treated with TNF blockers, including adalimumab products. These cases have had a very aggressive disease course and have been fatal. The majority of reported TNF blocker cases have occurred in patients with Crohn’s disease or ulcerative colitis and the majority were in adolescent and young adult males. Almost all of these patients had received treatment with azathioprine or 6-mercaptopurine concomitantly with a TNF blocker at or prior to diagnosis. It is uncertain whether the occurrence of HSTCL is related to use of a TNF blocker or a TNF blocker in combination with these other immunosuppressants. Consider the risks and benefits of HADLIMA treatment prior to initiating or continuing therapy in a patient with known malignancy. In clinical trials, more cases of malignancies were observed among adalimumab-treated patients compared to control patients. Non-melanoma skin cancer (NMSC) was reported during clinical trials for adalimumab-treated patients. Examine all patients, particularly those with a history of prolonged immunosuppressant or psoralen and ultraviolet A (PUVA) therapy, for the presence of NMSC prior to and during treatment with HADLIMA. In adalimumab clinical trials, there was an approximate 3-fold higher rate of lymphoma than expected in the general U.S. population. Patients with chronic inflammatory diseases, particularly those with highly active disease and/or chronic exposure to immunosuppressant therapies, may be at higher risk of lymphoma than the general population, even in the absence of TNF blockers. Postmarketing cases of acute and chronic leukemia were reported with TNF blocker use. Approximately half of the postmarketing cases of malignancies in children, adolescents, and young adults receiving TNF blockers were lymphomas; other cases included rare malignancies associated with immunosuppression and malignancies not usually observed in children and adolescents. HYPERSENSITIVITY Anaphylaxis and angioneurotic edema have been reported following adalimumab administration. If a serious allergic reaction occurs, stop HADLIMA and institute appropriate therapy. HEPATITIS B VIRUS REACTIVATION Use of TNF blockers, including HADLIMA, may increase the risk of reactivation of hepatitis B virus (HBV) in patients who are chronic carriers. Some cases have been fatal. Evaluate patients at risk for HBV infection for prior evidence of HBV infection before initiating TNF blocker therapy. Exercise caution in patients who are carriers of HBV and monitor them during and after HADLIMA treatment. Discontinue HADLIMA and begin antiviral therapy in patients who develop HBV reactivation. Exercise caution when resuming HADLIMA after HBV treatment. NEUROLOGIC REACTIONS TNF blockers, including adalimumab products, have been associated with rare cases of new onset or exacerbation of central nervous system and peripheral demyelinating diseases, including multiple sclerosis, optic neuritis, and Guillain-Barré syndrome. Exercise caution when considering HADLIMA for patients with these disorders; discontinuation of HADLIMA should be considered if any of these disorders develop. HEMATOLOGIC REACTIONS Rare reports of pancytopenia, including aplastic anemia, have been reported with TNF blockers. Medically significant cytopenia has been infrequently reported with adalimumab products. Consider stopping HADLIMA if significant hematologic abnormalities occur. CONGESTIVE HEART FAILURE Worsening and new onset congestive heart failure (CHF) has been reported with TNF blockers. Cases of worsening CHF have been observed with adalimumab products; exercise caution and monitor carefully. AUTOIMMUNITY Treatment with adalimumab products may result in the formation of autoantibodies and, rarely, in development of a lupus-like syndrome. Discontinue treatment if symptoms of a lupus-like syndrome develop. IMMUNIZATIONS Patients on HADLIMA should not receive live vaccines. Pediatric patients, if possible, should be brought up to date with all immunizations before initiating HADLIMA therapy. Adalimumab is actively transferred across the placenta during the third trimester of pregnancy and may affect immune response in the in utero-exposed infant. The safety of administering live or live-attenuated vaccines in infants exposed to adalimumab products in utero is unknown. Risks and benefits should be considered prior to vaccinating (live or live-attenuated) exposed infants. ADVERSE REACTIONS The most common adverse reactions in adalimumab clinical trials (>10%) were: infections (eg, upper respiratory, sinusitis), injection site reactions, headache, and rash. Before prescribing HADLIMA, please read the accompanying Full Prescribing Information, including the Boxed Warning about serious infections and malignancies, Medication Guide and Instructions for Use. About Samsung Bioepis Co., Ltd. Established in 2012, Samsung Bioepis is a biopharmaceutical company committed to realizing healthcare that is accessible to everyone. Through innovations in product development and a firm commitment to quality, Samsung Bioepis aims to become the world's leading biopharmaceutical company. Samsung Bioepis continues to advance a broad pipeline of biosimilar candidates that cover a spectrum of therapeutic areas, including immunology, oncology, ophthalmology, hematology, and endocrinology. For more information, please visit: www.samsungbioepis.com and follow us on social media – X, LinkedIn. _________________________ 1 Humira is a trademark registered in the US by AbbVie Biotechnology Ltd. 2 Stelara is a trademark of Johnson & Johnson.

FDA-approved generic provides cost-effective option for treating cancer LAKE ZURICH, Ill.--(BUSINESS WIRE)-- Fresenius Kabi announced today it has introduced Cyclophosphamide for Injection, USP, a generic substitute for Cytoxan, for use in treating several forms of cancer. Now available in the U.S., Cyclophosphamide for Injection, USP is the newest addition to Fresenius Kabi’s broad portfolio of generic oncology injectables that help make cancer therapies more affordable and accessible. This press release features multimedia. View the full release here: Cyclophosphamide is now available from Fresenius Kabi. (Photo: Business Wire) “The introduction of Cyclophosphamide for Injection adds another critical treatment to our broad and leading oncology portfolio that offers lower-cost options for treating cancer,” said John Ducker, president and CEO of Fresenius Kabi USA. Supplied as a 500mg, 1g, and 2g single-dose vials of lyophilized powder, the drug can be administered intravenously or orally. Fresenius Kabi offers all lyophilized presentations of cyclophosphamide currently in the market. Cyclophosphamide for Injection, USP is available through distributors or direct from Fresenius Kabi. About Cyclophosphamide for Injection, USP Cyclophosphamide for Injection is an alkylating drug indicated for the treatment of: Malignant Diseases: malignant lymphomas: Hodgkin's disease, lymphocytic lymphoma, mixed-cell type lymphoma, histiocytic lymphoma, Burkitt's lymphoma; multiple myeloma, leukemias, mycosis fungoides, neuroblastoma, adenocarcinoma of ovary, retinoblastoma, breast carcinoma Minimal Change Nephrotic Syndrome in Pediatric Patients: biopsy proven minimal change nephrotic syndrome patients who failed to adequately respond to or are unable to tolerate adrenocorticosteroid therapy Limitations of Use: The safety and effectiveness for the treatment of nephrotic syndrome in adults or other renal disease has not been established. IMPORTANT SAFETY INFORMATION Cyclophosphamide for Injection is contraindicated in patients with hypersensitivity to cyclophosphamide and with urinary outflow obstruction. Myelosuppression, Immunosuppression, Bone Marrow Failure and Infections - Severe immunosuppression may lead to serious and sometimes fatal infections. Close hematological monitoring is required. Urinary Tract and Renal Toxicity - Hemorrhagic cystitis, pyelitis, ureteritis, and hematuria can occur. Exclude or correct any urinary tract obstructions prior to treatment. Cardiotoxicity - Myocarditis, myopericarditis, pericardial effusion, arrhythmias and congestive heart failure, which may be fatal, have been reported. Monitor patients, especially those with risk factors for cardiotoxicity or pre-existing cardiac disease. Pulmonary Toxicity - Pneumonitis, pulmonary fibrosis and pulmonary veno-occlusive disease leading to respiratory failure may occur. Monitor patients for signs and symptoms of pulmonary toxicity. Secondary malignancies have been reported in patients treated with cyclophosphamide-containing regimens. Veno-occlusive Liver Disease - Fatal outcome can occur. Embryo-Fetal Toxicity - Can cause fetal harm. Advise female patients of reproductive potential to avoid pregnancy. Adverse reactions reported most often include neutropenia, febrile neutropenia, fever, alopecia, nausea, vomiting, and diarrhea. To report SUSPECTED ADVERSE REACTIONS, contact Fresenius Kabi USA, LLC at 1-800-551-7176, option 5, or FDA at 1-800-FDA-1088 or . Nursing Mothers: Discontinue drug or nursing. Females and males of reproductive potential: Counsel patients on pregnancy prevention and planning. Renal Patients: Monitor for toxicity in patients with moderate and severe renal impairment. This Important Safety Information does not include all the information needed to use Cyclophosphamide for Injection, USP safely and effectively. Please see the full prescribing information for Cyclophosphamide for Injection, USP at . About Fresenius Kabi Fresenius Kabi ( ) is a global health care company that specializes in injectable medicines, biosimilars, clinical nutrition and technologies for infusion and transfusion. The company’s products and services are used to help care for patients with critical and chronic conditions. The company’s U.S. headquarters is in Lake Zurich, Illinois. The company’s global headquarters is in Bad Homburg, Germany. To learn about U.S. career opportunities at Fresenius Kabi, visit us at and follow us on LinkedIn and Facebook.