MerTK

ALAMEDA, Calif. & RAHWAY, N.J.--(BUSINESS WIRE)-- Exelixis, Inc. (Nasdaq: EXEL) and Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced that the companies have entered into a clinical development collaboration to evaluate the combination of Exelixis’ investigational tyrosine kinase inhibitor (TKI) zanzalintinib with Merck’s anti-PD-1 therapy KEYTRUDA ® (pembrolizumab) in a phase 3 pivotal trial for the treatment of patients with head and neck squamous cell carcinoma (HNSCC), and zanzalintinib with WELIREG ® (belzutifan), Merck’s oral hypoxia-inducible factor-2 alpha (HIF-2α) inhibitor, in a phase 1/2 trial and two phase 3 pivotal trials for the treatment of patients with renal cell carcinoma (RCC). “This collaboration underscores our belief in zanzalintinib’s potential to drive patient benefit in combination with immunotherapy or targeted therapy in HNSCC and RCC indications that have unmet clinical need,” said Amy Peterson, M.D., Executive Vice President, Product Development & Medical Affairs, and Chief Medical Officer, Exelixis. “KEYTRUDA and WELIREG are approved therapies that have led to improved outcomes for some cancer patients, and we are pleased to collaborate with Merck’s clinical development organization to evaluate the potential of these therapies in combination with zanzalintinib. This collaboration paves the way for further zanzalintinib development in RCC in a pragmatic manner.” “We look forward to working with our colleagues at Exelixis to advance these clinical trials,” said Dr. Marjorie Green, Senior Vice President and Head of Oncology, Global Clinical Development, Merck Research Laboratories. “Merck remains committed to building upon the progress made to-date by strategically evaluating the potential of new combination regimens to improve outcomes for more patients.” Under the terms of the collaboration, Merck will supply KEYTRUDA for the ongoing, Exelixis-sponsored phase 3 STELLAR-305 pivotal trial in previously untreated PD-L1 positive recurrent or metastatic HNSCC. In addition, Merck will sponsor a phase 1/2 trial and two phase 3 pivotal trials in RCC. Merck will fund one of these phase 3 studies, and Exelixis will co-fund the phase 1/2 trial and the other phase 3 study, as well as supply zanzalintinib and cabozantinib. Exelixis maintains all global commercial and marketing rights to zanzalintinib. About Head and Neck Cancer Head and neck cancer describes a number of different tumors that develop in or around the throat, larynx, nose, sinuses and mouth. Most head and neck cancers are squamous cell carcinomas that begin in the flat, squamous cells that make up the thin surface layer of the structures in the head and neck. There are several factors that greatly increase the risk of developing head and neck cancer, including tobacco and alcohol use and human papillomavirus (HPV). It is estimated there were more than 891,500 new cases of head and neck cancer diagnosed and over 458,100 deaths from the disease in 2022 globally. In the U.S., it is estimated there will be more than 58,450 new cases of head and neck cancer diagnosed and more than 12,230 deaths from the disease in 2024. About Renal Cell Carcinoma Renal cell carcinoma is by far the most common type of kidney cancer; about nine out of 10 kidney cancer diagnoses are RCCs. Renal cell carcinoma is about twice as common in men than in women. Most cases of RCC are discovered incidentally during imaging tests for other abdominal diseases. Renal cell carcinoma is associated with a high risk of recurrence, with up to 40% of newly diagnosed patients experiencing recurrence within five years following surgery. In the U.S., it is estimated there will be approximately 81,600 new cases of kidney cancer diagnosed and approximately 14,400 deaths from the disease in 2024. Worldwide, it is estimated there were approximately 434,840 new cases of kidney cancer diagnosed and more than 155,953 deaths from the disease in 2022. About Zanzalintinib Zanzalintinib inhibits multiple cancer-related pathways that play a role in resistance to multiple therapies, including immune checkpoint inhibitors. Encouraging results from the expansion cohort of the phase 1b STELLAR-001 ( NCT03845166 ) clinical trial evaluating zanzalintinib in patients with previously treated clear cell RCC were reported at the 2023 International Kidney Cancer Symposium (IKCS): North America. About KEYTRUDA ® (pembrolizumab) injection, 100 mg KEYTRUDA is an anti-programmed death receptor-1 (PD-1) therapy that works by increasing the ability of the body’s immune system to help detect and fight tumor cells. KEYTRUDA is a humanized monoclonal antibody that blocks the interaction between PD-1 and its ligands, PD-L1 and PD-L2, thereby activating T lymphocytes which may affect both tumor cells and healthy cells. Merck has the industry’s largest immune-oncology clinical research program. There are currently more than 1,600 trials studying KEYTRUDA across a wide variety of cancers and treatment settings. The KEYTRUDA clinical program seeks to understand the role of KEYTRUDA across cancers and the factors that may predict a patient’s likelihood of benefitting from treatment with KEYTRUDA, including exploring several different biomarkers. Selected KEYTRUDA ® (pembrolizumab) Indications in the U.S. Head and Neck Squamous Cell Cancer KEYTRUDA, in combination with platinum and fluorouracil (FU), is indicated for the first-line treatment of patients with metastatic or with unresectable, recurrent head and neck squamous cell carcinoma (HNSCC). KEYTRUDA, as a single agent, is indicated for the first-line treatment of patients with metastatic or with unresectable, recurrent HNSCC whose tumors express PD-L1 [Combined Positive Score (CPS) ≥1] as determined by an FDA-approved test. KEYTRUDA, as a single agent, is indicated for the treatment of patients with recurrent or metastatic HNSCC with disease progression on or after platinum-containing chemotherapy. Renal Cell Carcinoma KEYTRUDA, in combination with axitinib, is indicated for the first-line treatment of adult patients with advanced renal cell carcinoma (RCC). KEYTRUDA is indicated for the adjuvant treatment of patients with RCC at intermediate-high or high risk of recurrence following nephrectomy, or following nephrectomy and resection of metastatic lesions. See additional selected KEYTRUDA indications in the U.S. after the Selected Important Safety Information. Selected Important Safety Information for KEYTRUDA Severe and Fatal Immune-Mediated Adverse Reactions KEYTRUDA is a monoclonal antibody that belongs to a class of drugs that bind to either the programmed death receptor-1 (PD-1) or the programmed death ligand 1 (PD-L1), blocking the PD-1/PD-L1 pathway, thereby removing inhibition of the immune response, potentially breaking peripheral tolerance and inducing immune-mediated adverse reactions. Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue, can affect more than one body system simultaneously, and can occur at any time after starting treatment or after discontinuation of treatment. Important immune-mediated adverse reactions listed here may not include all possible severe and fatal immune-mediated adverse reactions. Monitor patients closely for symptoms and signs that may be clinical manifestations of underlying immune-mediated adverse reactions. Early identification and management are essential to ensure safe use of anti–PD-1/PD-L1 treatments. Evaluate liver enzymes, creatinine, and thyroid function at baseline and periodically during treatment. For patients with TNBC treated with KEYTRUDA in the neoadjuvant setting, monitor blood cortisol at baseline, prior to surgery, and as clinically indicated. In cases of suspected immune-mediated adverse reactions, initiate appropriate workup to exclude alternative etiologies, including infection. Institute medical management promptly, including specialty consultation as appropriate. Withhold or permanently discontinue KEYTRUDA depending on severity of the immune-mediated adverse reaction. In general, if KEYTRUDA requires interruption or discontinuation, administer systemic corticosteroid therapy (1 to 2 mg/kg/day prednisone or equivalent) until improvement to Grade 1 or less. Upon improvement to Grade 1 or less, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose adverse reactions are not controlled with corticosteroid therapy. Immune-Mediated Pneumonitis KEYTRUDA can cause immune-mediated pneumonitis. The incidence is higher in patients who have received prior thoracic radiation. Immune-mediated pneumonitis occurred in 3.4% (94/2799) of patients receiving KEYTRUDA, including fatal (0.1%), Grade 4 (0.3%), Grade 3 (0.9%), and Grade 2 (1.3%) reactions. Systemic corticosteroids were required in 67% (63/94) of patients. Pneumonitis led to permanent discontinuation of KEYTRUDA in 1.3% (36) and withholding in 0.9% (26) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, 23% had recurrence. Pneumonitis resolved in 59% of the 94 patients. Pneumonitis occurred in 8% (31/389) of adult patients with cHL receiving KEYTRUDA as a single agent, including Grades 3-4 in 2.3% of patients. Patients received high-dose corticosteroids for a median duration of 10 days (range: 2 days to 53 months). Pneumonitis rates were similar in patients with and without prior thoracic radiation. Pneumonitis led to discontinuation of KEYTRUDA in 5.4% (21) of patients. Of the patients who developed pneumonitis, 42% interrupted KEYTRUDA, 68% discontinued KEYTRUDA, and 77% had resolution. Pneumonitis occurred in 7% (41/580) of adult patients with resected NSCLC who received KEYTRUDA as a single agent for adjuvant treatment of NSCLC, including fatal (0.2%), Grade 4 (0.3%), and Grade 3 (1%) adverse reactions. Patients received high-dose corticosteroids for a median duration of 10 days (range: 1 day to 2.3 months). Pneumonitis led to discontinuation of KEYTRUDA in 26 (4.5%) of patients. Of the patients who developed pneumonitis, 54% interrupted KEYTRUDA, 63% discontinued KEYTRUDA, and 71% had resolution. Immune-Mediated Colitis KEYTRUDA can cause immune-mediated colitis, which may present with diarrhea. Cytomegalovirus infection/reactivation has been reported in patients with corticosteroid-refractory immune-mediated colitis. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies. Immune-mediated colitis occurred in 1.7% (48/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (1.1%), and Grade 2 (0.4%) reactions. Systemic corticosteroids were required in 69% (33/48); additional immunosuppressant therapy was required in 4.2% of patients. Colitis led to permanent discontinuation of KEYTRUDA in 0.5% (15) and withholding in 0.5% (13) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, 23% had recurrence. Colitis resolved in 85% of the 48 patients. Hepatotoxicity and Immune-Mediated Hepatitis KEYTRUDA as a Single Agent KEYTRUDA can cause immune-mediated hepatitis. Immune-mediated hepatitis occurred in 0.7% (19/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.4%), and Grade 2 (0.1%) reactions. Systemic corticosteroids were required in 68% (13/19) of patients; additional immunosuppressant therapy was required in 11% of patients. Hepatitis led to permanent discontinuation of KEYTRUDA in 0.2% (6) and withholding in 0.3% (9) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, none had recurrence. Hepatitis resolved in 79% of the 19 patients. KEYTRUDA With Axitinib KEYTRUDA in combination with axitinib can cause hepatic toxicity. Monitor liver enzymes before initiation of and periodically throughout treatment. Consider monitoring more frequently as compared to when the drugs are administered as single agents. For elevated liver enzymes, interrupt KEYTRUDA and axitinib, and consider administering corticosteroids as needed. With the combination of KEYTRUDA and axitinib, Grades 3 and 4 increased alanine aminotransferase (ALT) (20%) and increased aspartate aminotransferase (AST) (13%) were seen at a higher frequency compared to KEYTRUDA alone. Fifty-nine percent of the patients with increased ALT received systemic corticosteroids. In patients with ALT ≥3 times upper limit of normal (ULN) (Grades 2-4, n=116), ALT resolved to Grades 0-1 in 94%. Among the 92 patients who were rechallenged with either KEYTRUDA (n=3) or axitinib (n=34) administered as a single agent or with both (n=55), recurrence of ALT ≥3 times ULN was observed in 1 patient receiving KEYTRUDA, 16 patients receiving axitinib, and 24 patients receiving both. All patients with a recurrence of ALT ≥3 ULN subsequently recovered from the event. Immune-Mediated Endocrinopathies Adrenal Insufficiency KEYTRUDA can cause primary or secondary adrenal insufficiency. For Grade 2 or higher, initiate symptomatic treatment, including hormone replacement as clinically indicated. Withhold KEYTRUDA depending on severity. Adrenal insufficiency occurred in 0.8% (22/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.3%), and Grade 2 (0.3%) reactions. Systemic corticosteroids were required in 77% (17/22) of patients; of these, the majority remained on systemic corticosteroids. Adrenal insufficiency led to permanent discontinuation of KEYTRUDA in <0.1% (1) and withholding in 0.3% (8) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement. Hypophysitis KEYTRUDA can cause immune-mediated hypophysitis. Hypophysitis can present with acute symptoms associated with mass effect such as headache, photophobia, or visual field defects. Hypophysitis can cause hypopituitarism. Initiate hormone replacement as indicated. Withhold or permanently discontinue KEYTRUDA depending on severity. Hypophysitis occurred in 0.6% (17/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.3%), and Grade 2 (0.2%) reactions. Systemic corticosteroids were required in 94% (16/17) of patients; of these, the majority remained on systemic corticosteroids. Hypophysitis led to permanent discontinuation of KEYTRUDA in 0.1% (4) and withholding in 0.3% (7) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement. Thyroid Disorders KEYTRUDA can cause immune-mediated thyroid disorders. Thyroiditis can present with or without endocrinopathy. Hypothyroidism can follow hyperthyroidism. Initiate hormone replacement for hypothyroidism or institute medical management of hyperthyroidism as clinically indicated. Withhold or permanently discontinue KEYTRUDA depending on severity. Thyroiditis occurred in 0.6% (16/2799) of patients receiving KEYTRUDA, including Grade 2 (0.3%). None discontinued, but KEYTRUDA was withheld in <0.1% (1) of patients. Hyperthyroidism occurred in 3.4% (96/2799) of patients receiving KEYTRUDA, including Grade 3 (0.1%) and Grade 2 (0.8%). It led to permanent discontinuation of KEYTRUDA in <0.1% (2) and withholding in 0.3% (7) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement. Hypothyroidism occurred in 8% (237/2799) of patients receiving KEYTRUDA, including Grade 3 (0.1%) and Grade 2 (6.2%). It led to permanent discontinuation of KEYTRUDA in <0.1% (1) and withholding in 0.5% (14) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement. The majority of patients with hypothyroidism required long-term thyroid hormone replacement. The incidence of new or worsening hypothyroidism was higher in 1185 patients with HNSCC, occurring in 16% of patients receiving KEYTRUDA as a single agent or in combination with platinum and FU, including Grade 3 (0.3%) hypothyroidism. The incidence of new or worsening hypothyroidism was higher in 389 adult patients with cHL (17%) receiving KEYTRUDA as a single agent, including Grade 1 (6.2%) and Grade 2 (10.8%) hypothyroidism. The incidence of new or worsening hyperthyroidism was higher in 580 patients with resected NSCLC, occurring in 11% of patients receiving KEYTRUDA as a single agent as adjuvant treatment, including Grade 3 (0.2%) hyperthyroidism. The incidence of new or worsening hypothyroidism was higher in 580 patients with resected NSCLC, occurring in 22% of patients receiving KEYTRUDA as a single agent as adjuvant treatment (KEYNOTE-091), including Grade 3 (0.3%) hypothyroidism. Type 1 Diabetes Mellitus (DM), Which Can Present With Diabetic Ketoacidosis Monitor patients for hyperglycemia or other signs and symptoms of diabetes. Initiate treatment with insulin as clinically indicated. Withhold KEYTRUDA depending on severity. Type 1 DM occurred in 0.2% (6/2799) of patients receiving KEYTRUDA. It led to permanent discontinuation in <0.1% (1) and withholding of KEYTRUDA in <0.1% (1) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement. Immune-Mediated Nephritis With Renal Dysfunction KEYTRUDA can cause immune-mediated nephritis. Immune-mediated nephritis occurred in 0.3% (9/2799) of patients receiving KEYTRUDA, including Grade 4 (<0.1%), Grade 3 (0.1%), and Grade 2 (0.1%) reactions. Systemic corticosteroids were required in 89% (8/9) of patients. Nephritis led to permanent discontinuation of KEYTRUDA in 0.1% (3) and withholding in 0.1% (3) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, none had recurrence. Nephritis resolved in 56% of the 9 patients. Immune-Mediated Dermatologic Adverse Reactions KEYTRUDA can cause immune-mediated rash or dermatitis. Exfoliative dermatitis, including Stevens-Johnson syndrome, drug rash with eosinophilia and systemic symptoms, and toxic epidermal necrolysis, has occurred with anti–PD-1/PD-L1 treatments. Topical emollients and/or topical corticosteroids may be adequate to treat mild to moderate nonexfoliative rashes. Withhold or permanently discontinue KEYTRUDA depending on severity. Immune-mediated dermatologic adverse reactions occurred in 1.4% (38/2799) of patients receiving KEYTRUDA, including Grade 3 (1%) and Grade 2 (0.1%) reactions. Systemic corticosteroids were required in 40% (15/38) of patients. These reactions led to permanent discontinuation in 0.1% (2) and withholding of KEYTRUDA in 0.6% (16) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, 6% had recurrence. The reactions resolved in 79% of the 38 patients. Other Immune-Mediated Adverse Reactions The following clinically significant immune-mediated adverse reactions occurred at an incidence of <1% (unless otherwise noted) in patients who received KEYTRUDA or were reported with the use of other anti–PD-1/PD-L1 treatments. Severe or fatal cases have been reported for some of these adverse reactions. Cardiac/Vascular: Myocarditis, pericarditis, vasculitis; Nervous System: Meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis (including exacerbation), Guillain-Barré syndrome, nerve paresis, autoimmune neuropathy; Ocular: Uveitis, iritis and other ocular inflammatory toxicities can occur. Some cases can be associated with retinal detachment. Various grades of visual impairment, including blindness, can occur. If uveitis occurs in combination with other immune-mediated adverse reactions, consider a Vogt-Koyanagi-Harada-like syndrome, as this may require treatment with systemic steroids to reduce the risk of permanent vision loss; Gastrointestinal: Pancreatitis, to include increases in serum amylase and lipase levels, gastritis, duodenitis; Musculoskeletal and Connective Tissue: Myositis/polymyositis, rhabdomyolysis (and associated sequelae, including renal failure), arthritis (1.5%), polymyalgia rheumatica; Endocrine: Hypoparathyroidism; Hematologic/Immune: Hemolytic anemia, aplastic anemia, hemophagocytic lymphohistiocytosis, systemic inflammatory response syndrome, histiocytic necrotizing lymphadenitis (Kikuchi lymphadenitis), sarcoidosis, immune thrombocytopenic purpura, solid organ transplant rejection, other transplant (including corneal graft) rejection. Infusion-Related Reactions KEYTRUDA can cause severe or life-threatening infusion-related reactions, including hypersensitivity and anaphylaxis, which have been reported in 0.2% of 2799 patients receiving KEYTRUDA. Monitor for signs and symptoms of infusion-related reactions. Interrupt or slow the rate of infusion for Grade 1 or Grade 2 reactions. For Grade 3 or Grade 4 reactions, stop infusion and permanently discontinue KEYTRUDA. Complications of Allogeneic Hematopoietic Stem Cell Transplantation (HSCT) Fatal and other serious complications can occur in patients who receive allogeneic HSCT before or after anti–PD-1/PD-L1 treatments. Transplant-related complications include hyperacute graft-versus-host disease (GVHD), acute and chronic GVHD, hepatic veno-occlusive disease after reduced intensity conditioning, and steroid-requiring febrile syndrome (without an identified infectious cause). These complications may occur despite intervening therapy between anti–PD-1/PD-L1 treatments and allogeneic HSCT. Follow patients closely for evidence of these complications and intervene promptly. Consider the benefit vs risks of using anti–PD-1/PD-L1 treatments prior to or after an allogeneic HSCT. Increased Mortality in Patients With Multiple Myeloma In trials in patients with multiple myeloma, the addition of KEYTRUDA to a thalidomide analogue plus dexamethasone resulted in increased mortality. Treatment of these patients with an anti–PD-1/PD-L1 treatment in this combination is not recommended outside of controlled trials. Embryofetal Toxicity Based on its mechanism of action, KEYTRUDA can cause fetal harm when administered to a pregnant woman. Advise women of this potential risk. In females of reproductive potential, verify pregnancy status prior to initiating KEYTRUDA and advise them to use effective contraception during treatment and for 4 months after the last dose. Adverse Reactions In KEYNOTE-006, KEYTRUDA was discontinued due to adverse reactions in 9% of 555 patients with advanced melanoma; adverse reactions leading to permanent discontinuation in more than one patient were colitis (1.4%), autoimmune hepatitis (0.7%), allergic reaction (0.4%), polyneuropathy (0.4%), and cardiac failure (0.4%). The most common adverse reactions (≥20%) with KEYTRUDA were fatigue (28%), diarrhea (26%), rash (24%), and nausea (21%). In KEYNOTE-054, when KEYTRUDA was administered as a single agent to patients with stage III melanoma, KEYTRUDA was permanently discontinued due to adverse reactions in 14% of 509 patients; the most common (≥1%) were pneumonitis (1.4%), colitis (1.2%), and diarrhea (1%). Serious adverse reactions occurred in 25% of patients receiving KEYTRUDA. The most common adverse reaction (≥20%) with KEYTRUDA was diarrhea (28%). Contacts Exelixis Investors Contact: Susan Hubbard EVP, Public Affairs & Investor Relations Exelixis, Inc. 650-837-8194 shubbard@exelixis.com Exelixis Media Contact: Hal Mackins For Exelixis, Inc. 415-994-0040 hal@torchcommunications.com Merck Investor Contacts: Peter Dannenbaum (732) 594-1579 Damini Chokshi (732) 594-1577 Merck Media Contacts: Julie Cunningham (617) 519-6264 Carly Myar (917) 227-5957 Read full story here

$1M TRAP award to support preclinical safety study for gene therapy vector targeting rhodopsin- RHO-adRP Additional project and operational funding to support MERTK gene therapy IND-enabling studies RESEARCH TRIANGLE PARK, N.C., June 13, 2024 (GLOBE NEWSWIRE) -- Opus Genetics, a patient-first, clinical-stage gene therapy company developing treatments for inherited retinal diseases, today announced it has received $1.7 million in project-based funding from the Foundation Fighting Blindness to help advance two preclinical candidate programs. “Opus is immensely grateful for the generous support from the Foundation Fighting Blindness, which will catalyze our efforts in pioneering treatments for inherited retinal diseases. This $1.7 million funding infusion makes a significant impact to help accelerate the development of these two preclinical candidates,” said Ben Yerxa, Ph.D., chief executive officer of Opus. “Together, we strive toward a future where therapies to help treat patients with inherited retinal diseases are readily available.” Opus received a $1M Translational Research Acceleration Program (TRAP) award to conduct a preclinical safety study for a gene therapy vector designed to target rhodopsin-mediated autosomal dominant retinitis pigmentosa (RHO-adRP). The safety study will be conducted in the established canine animal model at the University of Pennsylvania School of Veterinary Medicine (Penn Vet). The Company anticipates this is the last preclinical study required before the gene therapy will enter clinical trials. RHO-adRP is one of the most common IRDs, estimated to affect approximately one in 51,000 people, or more than 6,000 people, in the United States alone. Additionally, Opus received approximately $700,000 in project-based and operational funding to support the preclinical development of a novel viral vector for treating retinitis pigmentosa due to mutations in the proto-oncogene tyrosine-protein kinase MER (MERTK) gene. The Company is collaborating with the Foundation to begin IND-enabling studies for a newly designed adeno-associated virus (AAV) viral vector to replace mutated MERTK genes in the retinal pigmented epithelial (RPE) cells of the retina. The initial funding will provide the resources for testing the vector in an established animal model of the disease and to conduct early safety assessments in larger animals. MERTK mutations cause a rod-cone dystrophy with early macular atrophy, and retinitis pigmentosa is the most common retinal phenotype. “We're excited to announce our funding commitment to Opus, a trailblazer in inherited retinal disease therapeutics and a company created based on our mission of ultimately curing blindness caused by retinal degenerative diseases. This investment highlights our steadfast dedication to hastening innovative solutions for those combating inherited retinal diseases,” said Jason Menzo, chief executive officer of the Foundation Fighting Blindness. “In collaboration with Opus, we're propelling forward promising clinical candidate programs with the potential to revolutionize the lives of those affected by these challenging conditions.” About Foundation Fighting BlindnessEstablished in 1971, the Foundation Fighting Blindness is the world's leading private funding source for retinal degenerative disease research. The Foundation has raised more than $816 million toward its mission of accelerating research for preventing, treating, and curing blindness caused by the entire spectrum of blinding retinal diseases including: retinitis pigmentosa, macular degeneration, and Usher syndrome. Visit FightingBlindness.org for more information. About Opus GeneticsOpus Genetics is a clinical-stage gene therapy company for inherited retinal diseases with a unique model and purpose. Backed by Foundation Fighting Blindness’ venture arm, the RD Fund, Opus combines unparalleled insight and commitment to patient need with wholly owned programs in numerous orphan retinal diseases. Its AAV-based gene therapy portfolio, including a derisked LCA5 lead program currently in a Phase 1/2 clinical trial, tackles some of the most neglected forms of inherited blindness while creating novel orphan manufacturing scale and efficiencies. Based in Research Triangle Park, N.C., the company leverages knowledge of the best science and the expertise of pioneers in ocular gene therapy to transparently drive transformative treatments to patients. For more information, visit www.opusgenetics.com. Media Contact:Gina Mangiaracina6 Degrees gmangiaracina@6degreesPR.com

KT-474/SAR444656 (IRAK4) Phase 2 trials for both hidradenitis suppurativa (HS) and atopic dermatitis (AD) planned to start in 4Q23 by partner Sanofi Phase 1 oncology trials for KT-253 (MDM2), KT-333 (STAT3), and KT-413 (IRAKIMiD) degraders ongoing,with clinical updates planned for later in 2023 June 30, 2023 cash balance approximately $472 million, with cash runway into second half of 2025 Company to hold quarterly results call and webcast at 8:30 a.m. ET WATERTOWN, Mass., Aug. 03, 2023 (GLOBE NEWSWIRE) -- Kymera Therapeutics, Inc. (NASDAQ: KYMR), a clinical-stage biopharmaceutical company advancing targeted protein degradation (TPD) to deliver novel small molecule protein degrader medicines, today reported business highlights and financial results for the second quarter ended June 30, 2023. “Kymera has made strong progress with our three proprietary clinical programs over the last quarter, including dosing our first patient in the KT-253 Phase 1 study and sharing data that both KT-333 and KT-413 reached degradation levels that were associated with anti-tumor activity in preclinical models. We believe these findings reinforce Kymera’s ability to translate our preclinical pharmacokinetic, pharmacodynamic and safety models to patients and provide a strong foundation as we expand our pipeline with potentially best-in-class, high-value programs. We expect to share updates on these programs later this year,” said Nello Mainolfi, Founder, President and CEO, Kymera Therapeutics. “Additionally, our partner Sanofi expects to initiate the first two Phase 2 clinical trials for KT-474 in the fourth quarter, moving us forward on our mission of building a fully-integrated global medicines company.” Business Highlights and Recent Developments The Company presented clinical data from the KT-474 Phase 1 trial at the European Academy of Dermatology and Venereology (EADV) Symposium, sharing these data for the first time at a scientific meeting.The Company announced the first patient was dosed in the Phase 1 clinical trial evaluating its investigational MDM2 degrader, KT-253.The U.S. Food and Drug Administration (FDA) granted orphan drug designation to KT-253 for the treatment of Acute Myeloid Leukemia (AML).At the European Hematology Association (EHA) Congress, the Company presented data demonstrating superior efficacy of MDM2 degrader KT-253 compared to small molecule inhibitors in preclinical leukemia models. In conjunction with the International Conference on Malignant Lymphoma (ICML), Kymera provided clinical trial updates for its KT-333 and KT-413 oncology programs focused on pharmacokinetic/pharmacodynamic (PK/PD) and safety from additional patient cohorts showing target knockdown at or near levels that were associated with efficacy in preclinical tumor models. The KT-333 clinical data was presented in a poster at ICML.At the American Society for Mass Spectrometry (ASMS) Annual Meeting, Kymera presented two posters focused on Kymera’s powerful drug discovery engine and the advanced proteomics technologies utilized to provide deep insights into degrader selectivity and mechanism-of-action in physiologically relevant cellular settings at high resolution and dimensionality.In collaboration with the Raymond Birge laboratory at the Department of Microbiology, Biochemistry and Molecular Genetics, and Center for Cell Signaling at Rutgers University, Kymera published a paper in Frontiers in Immunology (link) demonstrating degraders can be designed to selectively degrade multiple tumor-associated macrophage (TAM) receptors and modulate receptor expression in vitro and in vivo. While not currently in the active pipeline, this work demonstrates the utility of proteome editing enabled by degraders toward therapeutically relevant pathway biology in preclinical models and shows the technology could serve as a viable therapeutic strategy for targeting MERTK and other TAM receptors that are expressed across a range of liquid and solid tumors.The Company announced the appointment of Jeremy Chadwick, Ph.D., as Chief Operating Officer. Dr. Chadwick joined Kymera with extensive experience overseeing global development operations, regulatory and program management at a range of biopharmaceutical companies. As a member of the Company’s senior management team, Dr. Chadwick will develop and execute near-term and long-range strategies to maximize the impact of Kymera’s expanding pipeline.In July, Justine Koenigsberg joined Kymera as Vice President and Head of Investor Relations. Ms. Koenigsberg has more than 25 years of investor relations and corporate communications experience within the biotechnology industry. She most recently served as Senior Vice President, Corporate Communications and Investor Relations at Concert Pharmaceuticals, Inc. Prior to joining Concert, she held senior communication roles at ViaCell, Inc. and Transkaryotic Therapies, Inc. (TKT) where she developed and implemented a variety of communication strategies and managed their investor relations programs. Before TKT, she held communications positions at Vertex Pharmaceuticals, Inc. Ms. Koenigsberg is a member of the National Investors Relations Institute and served on the Board of Directors and as a Past-President of its Boston Chapter. She holds a B.S. in Business Administration from Northeastern University. Anticipated Upcoming Milestones Kymera’s partner Sanofi plans to initiate Phase 2 clinical trials of IRAK4 degrader KT-474 (SAR444656) in both HS and AD in the fourth quarter of 2023. Kymera plans to share updates on its clinical-stage oncology programs later this year, including data evaluating anti-tumor activity in the target patient populations for KT-333 and KT-413 and initial safety and proof-of-mechanism data from the KT-253 Phase 1 clinical trial. Program Background Information For more information on Kymera’s pipeline visit our website: https://www.kymeratx.com/pipeline/. Conference Call To access the conference call via phone, please dial +1 (800) 715-9871 (US) or +1 (646) 307-1963 (International) and ask to join the Kymera Therapeutics call or provide Conference ID 7353312. A live webcast of the event will be available under Events and Presentations in the Investors section of the Company’s website at www.kymeratx.com. A replay of the webcast will be archived and available following the event. Second Quarter 2023 Financial Results Collaboration Revenues: Collaboration revenues were $16.5 million for the second quarter of 2023 compared to $11.5 million for the second quarter of 2022. Collaboration revenues include revenue from the Company’s Sanofi and Vertex collaborations. Research and Development Expenses: Research and development expenses were $45.8 million for the second quarter of 2023 compared to $41.3 million for the second quarter of 2022. This increase was primarily due to increased expenses related to the investment in our STAT3, IRAKIMiD, and MDM2 clinical stage programs, platform and discovery programs, as well as an increase in occupancy and related costs due to continued growth in the research and development organization. Stock based compensation expenses included in R&D were $5.7 million for the second quarter of 2023 compared to $4.8 million for the second quarter of 2022. General and Administrative Expenses: General and administrative expenses were $14.1 million for the second quarter of 2023 compared to $11.0 million for the second quarter of 2022. The increase was primarily due to an increase in legal and professional service fees in support of the Company’s growth and an increase in personnel, facility, occupancy, and other expenses from an increase in headcount to support growth as a public company. Stock based compensation expenses included in general and administrative expenses were $5.5 million for the second quarter of 2023 compared to $4.9 million for the second quarter of 2022. Net Loss: Net loss was $38.8 million for the second quarter of 2023 compared to a net loss of $40.3 million for the second quarter of 2022. Cash and Cash Equivalents: As of June 30, 2023, Kymera had approximately $472 million in cash, cash equivalents, and investments. Kymera expects that its cash and cash equivalents will provide the company with an anticipated cash runway into the second half of 2025. Its existing cash is expected to take the company past the proof-of-concept Phase 2 data for KT-474, as well as early proof-of-concept data for KT-253, KT-333 and KT-413, while Kymera continues to identify opportunities to accelerate growth and expand its pipeline, technologies and clinical indications. About Kymera TherapeuticsKymera is a biopharmaceutical company pioneering the field of targeted protein degradation, a transformative approach to address disease targets and pathways inaccessible with conventional therapeutics. Kymera’s Pegasus platform is a powerful drug discovery engine, advancing novel small molecule programs designed to harness the body’s innate protein recycling machinery to degrade dysregulated, disease-causing proteins. With a focus on undrugged nodes in validated pathways, Kymera is advancing a pipeline of novel therapeutic candidates designed to address the most promising targets and provide patients with more effective treatments. Kymera’s initial programs target IRAK4, IRAKIMiD, and STAT3 within the IL-1R/TLR or JAK/STAT pathways, and the MDM2 oncoprotein, providing the opportunity to treat patients with a broad range of immune-inflammatory diseases, hematologic malignancies, and solid tumors. Founded in 2016, Kymera is headquartered in Watertown, Mass. Kymera has been named a “Fierce 15” company by Fierce Biotech and has been recognized by both the Boston Globe and the Boston Business Journal as one of Boston’s top workplaces. For more information about our people, science and pipeline, please visit www.kymeratx.com or follow us on Twitter or LinkedIn. About Kymera’s Pegasus™ PlatformKymera’s Pegasus platform is a powerful drug discovery engine that enables the discovery of novel small molecule protein degrader medicines designed to target and disrupt specific protein complexes and full signaling cascades in disease, placing once elusive disease targets within reach. The key components of the platform combine Kymera’s broad understanding of the localization and expression levels of the hundreds of E3 ligases in the human body with the Company’s proprietary E3 Ligase Binders Toolbox, and advanced chemistry, biology, and computational capabilities to develop protein degraders that address significant, unmet medical needs. Cautionary Note Regarding Forward-Looking StatementsThis press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, without limitation, implied and express statements by Kymera Therapeutics regarding its: strategy, business plans and objectives for the IRAK4, IRAKIMiD, STAT3, and MDM2 degrader programs; plans and timelines for the preclinical and clinical development of its product candidates, including the therapeutic potential, clinical benefits and safety thereof; expectations regarding timing, success and data announcements of current ongoing preclinical and clinical trials; the ability to initiate new clinical programs; and Kymera’s financial condition and expected cash runway into the second half of 2025. The words "may," “might,” "will," "could," "would," "should," "expect," "plan," "anticipate," "intend," "believe," “expect,” "estimate," “seek,” "predict," “future,” "project," "potential," "continue," "target" and similar words or expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Any forward-looking statements in this press release are based on management's current expectations and beliefs and are subject to a number of risks, uncertainties and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this press release, including, without limitation, risks associated with: the impact of COVID-19 or other pandemics or epidemics on countries or regions in which we have operations or do business, as well as on the timing and anticipated results of our current and future preclinical studies and clinical trials, supply chain, strategy and future operations; the delay of any current and future preclinical studies or clinical trials or the development of Kymera Therapeutics' drug candidates; the risk that the results of current preclinical studies and clinical trials may not be predictive of future results in connection with current or future preclinical and clinical trials, including those for KT-474, KT-333, KT-413 and KT-253; Kymera Therapeutics' ability to successfully demonstrate the safety and efficacy of its drug candidates; the timing and outcome of the Kymera Therapeutics' planned interactions with regulatory authorities; obtaining, maintaining and protecting its intellectual property; and Kymera Therapeutics' relationships with its existing and future collaboration partners. These and other risks and uncertainties are described in greater detail in the section entitled "Risk Factors" in the Annual Report on Form 10-K for the period ended December 31, 2022 and most recent Quarterly Report on Form 10-Q, as well as discussions of potential risks, uncertainties, and other important factors in Kymera Therapeutics' subsequent filings with the Securities and Exchange Commission. In addition, any forward-looking statements represent Kymera Therapeutics' views only as of today and should not be relied upon as representing its views as of any subsequent date. Kymera Therapeutics explicitly disclaims any obligation to update any forward-looking statements. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements. KYMERA THERAPEUTICS, INC.Consolidated Balance Sheets(In thousands, except share and per share amounts)(Unaudited) June 30, 2023 December 31, 2022Assets Cash, cash equivalents and marketable securities $472,333 $559,494Property and equipment, net 27,494 13,334Right-of-use assets, operating lease 55,687 8,909Other assets 26,431 21,397Total assets $581,945 $603,134Liabilities and Stockholders’ Equity Deferred revenue $44,723 $63,260Operating lease liabilities 73,068 14,681Other liabilities 28,726 35,042Total liabilities 146,517 112,983Total stockholders’ equity 435,428 490,151Total liabilities and stockholders’ equity $581,945 $603,134 KYMERA THERAPEUTICS, INC.Consolidated Statements of Operations and Comprehensive Loss(In thousands, except share and per share amounts)(Unaudited) Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Collaboration Revenue—from related parties$16,513 $11,514 $25,979 $21,136 Operating expenses: Research and development$45,767 $41,293 $87,994 $77,238 General and administrative 14,129 11,031 26,694 21,642 Total operating expenses 59,896 52,324 114,688 98,880 Loss from operations (43,383) (40,810) (88,709) (77,744)Other income (expense): Interest and other income 4,632 594 9,085 884 Interest and other expense (48) (41) (103) (81)Total other income 4,584 553 8,982 803 Net loss attributable to common stockholders$(38,799) $(40,257) $(79,727) $(76,941)Net loss per share attributable to common stockholders, basic and diluted$(0.67) $(0.78) $(1.37) $(1.49)Weighted average common stocks outstanding, basic and diluted 58,326,963 51,772,440 58,257,387 51,712,081 Investor Contacts: Bruce Jacobs Chief Financial Officer investors@kymeratx.com 857-285-5300 Justine KoenigsbergVice President, Investor Relationsinvestors@kymeratx.com857-285-5300Media Contact:Todd Cooper Senior Vice President, Corporate Affairs media@kymeratx.com 857-285-5300