Stage III Colon Cancer

-- Single patient in 2mg cohort with stage 3 colon cancer who received 4 prior lines of therapy achieves prolonged stable disease and remains on drug into 6th dosing cycle -- -- No treatment-related adverse events (TRAEs) or dose-limiting toxicities (DLTs) observed to date, including no rash or gastrointestinal (GI) AEs -- -- Systemic exposure at steady-state enables constant target inhibition while avoiding peak plasma toxicities -- -- Half-life of approximately 70 hours supports once-daily or less frequent oral dosing -- -- Distinctive MEK inhibitor profile for the treatment of both NF1-related plexiform and cutaneous neurofibromas, cancer, and other opportunities -- MIAMI, Sept. 26, 2024 (GLOBE NEWSWIRE) -- Pasithea Therapeutics Corp. (NASDAQ: KTTA) (“Pasithea” or the “Company”), a clinical-stage biotechnology company developing PAS-004, a next-generation macrocyclic MEK inhibitor, for the treatment of neurofibromatosis type 1 (NF1) and other cancer indications, today announced safety, tolerability, pharmacokinetic (PK) and preliminary efficacy data from the first 2 cohorts of patients (n=6) in its Phase 1 clinical trial of PAS-004, being conducted at four clinical sites in the United States. The Phase 1 clinical trial is a multi-center, open-label, dose escalation 3+3 study design to evaluate the safety, tolerability, pharmacokinetic (PK), pharmacodynamic (PD), and preliminary efficacy of PAS-004 in patients with MAPK pathway driven advanced solid tumors with a documented RAS, NF1 or RAF mutation or patients who have failed BRAF/MEK inhibition (NCT06299839). “We are very pleased to share the PK, safety, and preliminary efficacy data from the 2 mg and 4 mg cohorts in our first-in-human Phase 1 clinical trial of PAS-004. We believe these data demonstrate a PK and safety profile that differentiates PAS-004 as a next-generation MEK inhibitor. We have already achieved significant PAS-004 exposures with a favorable safety profile and have not seen adverse side effects such as rash or GI toxicity, which are typical for MEK inhibitors even at low doses. The long half-life at approximately 70 hours, and the ability to achieve a flat PK curve at steady-state, aim to provide a constant target inhibition while avoiding peak plasma toxicities, which is a unique PK profile among MEK inhibitors used for the treatment of Neurofibromatosis type 1 (NF1),” stated Dr. Tiago Reis Marques, Chief Executive Officer of Pasithea. “In addition, we are encouraged to see early potential signs of efficacy, with a heavily pre-treated patient with colorectal cancer showing prolonged stable disease. Colorectal cancer is known to not provide a RECIST response when treated with single-agent MEK inhibitors. This patient has a BRAF K601E mutation, a mutational status with no approved therapies. We are encouraged that this patient has been treated continuously into the 6th 28-day dosing cycle with no toxicities or AEs observed. While still early in clinical development, we believe PAS-004 is showing early signs of differentiation, indicating PAS-004 has the potential to outperform current MEK inhibitors in terms of safety, reduced administration frequency, and potentially efficacy. Our goal is to provide a once-daily or less frequent dosing treatment with broader application, not only for NF1 but also for other indications.” Interim Phase 1 Results Pharmacokinetics (PK) Plasma exposure increased with an increase in dose and linear PK is observedLong half-life of approximately 70 hours will allow for once daily dosing or longer intervalsProlonged systemic exposure with minimal fluctuation in PAS-004 plasma concentration at steady state (Cmax/Cmin ratio of 1.2) indicates a potential to achieve constant target inhibition At steady-state, drug levels peaked at about 5 hours with a geometric mean maximum concentration (Cmax) of 16.2 and 61.3 ng/mL for the 2 mg and 4 mg dose groups, respectively. The mean elimination half-life was 67.9 hours supporting once-daily or less frequent oral dosing. “PAS-004 has demonstrated distinct properties that we believe are significant advantages for an oral MEK inhibitor. PAS-004 has a significantly longer half-life compared to early-generation MEK inhibitors, particularly those used for the treatment of NF1, which have half-lives of less than 8 hours. The ability to achieve prolonged plasma exposures, as reflected in stable plasma concentrations at steady state, may potentially allow PAS-004 to achieve efficacious doses with a favorable safety profile,” stated Dr. Tiago Reis Marques, Chief Executive Officer of Pasithea. Safety & Tolerability No treatment-related adverse events (TRAEs) or dose limiting toxicities (DLTs) observed to date In the first 2 dosing cohorts (n=6), PAS-004 was shown to be well-tolerated with a favorable safety profile with no drug-related dose interruptions, reductions or discontinuations. There were no drug-related serious AEs (SAE) in any dose arm and no protocol-defined stopping criteria were met. Importantly, at the 2 and 4 mg dose levels no rash or skin toxicity, gastro-intestinal (GI) toxicity, or ocular toxicity have been observed to date. The study independent Safety Review Committee has completed its safety review of data from the second dose cohort of 4 mg and the Company has initiated cohort 3 dosing at an increased dose of 8 mg in capsules and has filed a protocol amendment to increase dosing schedule. PAS-004 Demonstrates a Differentiated MEK Inhibitor Profile Unlike first-generation MEK inhibitors for the treatment of NF1 that require twice-daily dosing (BID) and exhibit short half-lives (<8 hours), PAS-004 has the potential to achieve prolonged target inhibition due to its long half-life of approximately 70 hours with once-daily dosing (QD). The PK profile shows consistent plasma levels at steady-state, as reflected by a low Cmax to Cmin ratio, potentially reducing the risks for Cmax-related toxicity. These findings provide a compelling rationale for the advancement of PAS-004 into clinical trials for both the treatment of cutaneous and plexiform neurofibromas in NF1, cancer and other MAPK-driven opportunities. The company expects to provide additional trial updates on a periodic basis as the trial progresses. About Pasithea Therapeutics Corp. Pasithea is a biotechnology company focused on the discovery, research and development of innovative treatments for central nervous system (CNS) disorders and RASopathies. With an experienced team of experts in the fields of neuroscience, translational medicine, and drug development, Pasithea is developing new molecular entities for the treatment of neurological disorders, including Neurofibromatosis type 1 (NF1), Solid Tumors, and Amyotrophic Lateral Sclerosis (ALS). Forward Looking Statements This press release contains statements that constitute “forward-looking statements” made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include statements regarding the Company’s ongoing Phase 1 clinical trial and the safety, tolerability, pharmacokinetic (PK) and preliminary efficacy of PAS-004, as well as all other statements, other than statements of historical fact, regarding the Company’s current views and assumptions with respect to future events regarding its business, as well as other statements with respect to the Company’s plans, assumptions, expectations, beliefs and objectives, the success of the Company’s current and future business strategies, product development, preclinical studies clinical studies, clinical and regulatory timelines, market opportunity, competitive position, business strategies, potential growth opportunities and other statements that are predictive in nature. Forward-looking statements are subject to numerous conditions, many of which are beyond the control of the Company. While the Company believes these forward-looking statements are reasonable, undue reliance should not be placed on any such forward-looking statements, which are based on information available to the Company on the date of this release. These forward-looking statements are based upon current estimates and assumptions and are subject to various risks and uncertainties, including risks that future clinical trial results may not match results observed to date, may be negative or ambiguous, or may not reach the level of statistical significance required for regulatory approval, as well as other factors set forth in the Company’s most recent Annual Report on Form 10-K, Quarterly Report on Form 10-Q and other filings made with the U.S. Securities and Exchange Commission (SEC). Thus, actual results could be materially different. The Company undertakes no obligation to update these statements whether as a result of new information, future events or otherwise, after the date of this release, except as required by law. Pasithea Therapeutics Contact Patrick GaynesCorporate Communicationspgaynes@pasithea.com Photos accompanying this announcement are available at https://www.globenewswire.com/NewsRoom/AttachmentNg/4765238d-9961-438e-b459-509a5c917974 https://www.globenewswire.com/NewsRoom/AttachmentNg/0e484fc9-7068-4c8f-8060-f4109228d013

AUSTIN, Texas--( BUSINESS WIRE )-- Natera, Inc. (NASDAQ: NTRA), a global leader in cell-free DNA and genetic testing, announced that new data from the GALAXY arm of the ongoing CIRCULATE-Japan trial was released today at the 2024 Congress of the European Society for Medical Oncology (ESMO) in Barcelona, Spain. GALAXY is one of the largest and most comprehensive prospective studies of circulating tumor DNA (ctDNA) testing in resectable colorectal cancer (CRC). This latest analysis, which will also be published in Nature Medicine on September 16, provides the first evidence of the ability of Signatera-based molecular residual disease (MRD) detection to predict overall survival (OS). The data also demonstrates Signatera’s ability to predict adjuvant chemotherapy (ACT) benefit in resectable CRC, with ctDNA clearance as an indicator of a superior survival benefit compared to no clearance. In the study, 2,240 patients with stage II–IV CRC were monitored using Signatera after curative-intent surgery with a median follow-up of 23 months. Key takeaways include: Signatera status was predictive of overall survival. Signatera-positivity in the post-op MRD window was found to be significantly associated with worse OS compared to Signatera-negative patients (HR: 9.68, p-value < 0.01) with a 36-month OS of 71.80% vs. 96.0%, respectively. This 10x advantage in overall survival compares favorably to all known guideline-recommended biomarkers that have HRs for overall survival in a range of 1-4. Signatera status was predictive of an overall survival benefit from adjuvant chemotherapy. High-risk stage II and stage III-IV patients who were Signatera-positive after surgery and received ACT demonstrated superior OS (adjusted HR: 0.53, p-value = 0.05), corresponding to a 50% reduction in the risk of death when treated with ACT. By comparison, the MOSAIC trial 1 , which was the last practice-changing study in adjuvant CRC, demonstrated a 16% reduction in risk of death (HR: 0.84, p-value = 0.05). Signatera-negative patients did not derive an OS benefit from ACT (adjusted HR: 0.53, p-value = 0.13). Signatera status remained the most significant predictor of recurrence. Signatera-positivity after surgery was the single most significant prognostic factor associated with inferior DFS (HR 12.08, p-value <0.01) and OS (HR 9.87, p-value <0.01) in a multivariate analysis that included all clinicopathologic risk factors currently in use. This is also reflected by the 36-month DFS difference between Signatera-positive and Signatera-negative patients at 16.7% (95% CI: 12.1–21.9%) versus 83.5% (95% CI: 81.2%–85.6%), respectively. The association of Signatera-positivity with a significantly increased risk for recurrence was observed across all pathologic stages. Sustained Signatera clearance after ACT was associated with improved survival. Patients who clear ctDNA and remained Signatera-negative (referred to as “sustained clearance”) had superior survival benefit with 24-month OS of 100%. This compares to patients who cleared ctDNA for a period of time but later become Signatera-positive (referred to as “transient clearance”), with 24-month OS of 82%, and patients who did not achieve ctDNA clearance, with 24-month OS of 61%. This finding further supports the utility of sustained ctDNA clearance as a surrogate endpoint for long-term outcomes. “ We now have compelling prospective evidence from a large trial of more than 2,200 patients that clearly reinforces the link between MRD status and overall survival,” said Yoshiaki Nakamura, MD, PhD, co-author of the paper and principal investigator of the study from the National Cancer Center Hospital East in Kashiwa, Chiba, Japan. “ These findings suggest that Signatera can predict post-surgical outcomes for colorectal cancer patients with great precision, redefining the future of personalized medicine and providing the potential to significantly improve outcomes for a greater number of patients.” “ The GALAXY data released today builds on an earlier analysis from the same study that was published in Nature Medicine in 2023,” said Minetta Liu, MD, chief medical officer of oncology at Natera. “ Introducing 36-month, first-of-its-kind data on overall survival is an important milestone that reinforces the potential to improve outcomes for patients diagnosed with colorectal cancer. The updated data affirms ctDNA status as a critical measure both for prognosis and for predicting which patients may truly benefit from adjuvant chemotherapy.” About Signatera Signatera is a personalized, tumor-informed, molecular residual disease test for patients previously diagnosed with cancer. Custom-built for each individual, Signatera uses circulating tumor DNA to detect and quantify cancer left in the body, identify recurrence earlier than standard of care tools, and help optimize treatment decisions. The test is available for clinical and research use and is covered by Medicare for patients with colorectal cancer, breast cancer, ovarian cancer and muscle invasive bladder cancer, as well as for immunotherapy monitoring of any solid tumor. Signatera has been clinically validated across multiple cancer types and indications, with published evidence in more than 70 peer-reviewed papers. About Natera Natera™ is a global leader in cell-free DNA and genetic testing, dedicated to oncology, women’s health, and organ health. We aim to make personalized genetic testing and diagnostics part of the standard of care to protect health, and inform earlier, more targeted interventions that help lead to longer, healthier lives. Natera’s tests are validated by more than 200 peer-reviewed publications that demonstrate high accuracy. Natera operates ISO 13485-certified and CAP-accredited laboratories certified under the Clinical Laboratory Improvement Amendments (CLIA) in Austin, Texas and San Carlos, California. For more information, visit www.natera.com . Forward-Looking Statements All statements other than statements of historical facts contained in this press release are forward-looking statements and are not a representation that Natera’s plans, estimates, or expectations will be achieved. These forward-looking statements represent Natera’s expectations as of the date of this press release, and Natera disclaims any obligation to update the forward-looking statements. These forward-looking statements are subject to known and unknown risks and uncertainties that may cause actual results to differ materially, including with respect to whether the results of clinical or other studies will support the use of our product offerings, the impact of results of such studies, our expectations of the reliability, accuracy and performance of our tests, or of the benefits of our tests and product offerings to patients, providers and payers. Additional risks and uncertainties are discussed in greater detail in "Risk Factors" in Natera’s recent filings on Forms 10-K and 10-Q and in other filings Natera makes with the SEC from time to time. These documents are available at www.natera.com/investors and www.sec.gov . References Thierry André et al., Improved Overall Survival With Oxaliplatin, Fluorouracil, and Leucovorin As Adjuvant Treatment in Stage II or III Colon Cancer in the MOSAIC Trial. JCO 27, 3109-3116(2009). DOI:10.1200/JCO.2008.20.6771

PALO ALTO, Calif.--( BUSINESS WIRE )--Guardant Health, Inc. (Nasdaq: GH), a leading precision oncology company, today announced Clinical Cancer Research , a journal of the American Association for Cancer Research, will publish results today from the COSMOS study confirming the high sensitivity and specificity of the Guardant Reveal blood test in predicting recurrence of colorectal cancer (CRC). The COSMOS (COnquer Solid Malignancies by blOod Screening) study is the largest study to date evaluating minimal residual disease (MRD) detection using a tissue-free epigenomic approach with the Guardant Reveal test. 1 The study assessed more than 1,900 longitudinal surveillance samples from 342 patients with clinical stage I-III resected CRC. 2 The study results demonstrated that detection of MRD using the Guardant Reveal test was associated with statistically significant and clinically relevant recurrence prediction at each post-surgical timepoint evaluated for patients with stage II or higher CRC. “In the COSMOS study, we observed sensitive and specific detection of minimal residual disease in resected colorectal cancer using the Guardant Reveal tissue-agnostic epigenomic-based ctDNA assay,” said Yoshiaki Nakamura, M.D., Ph.D., chief, International Research Promotion Office, Department of Gastroenterology and Gastrointestinal Oncology at National Cancer Hospital East in Chiba, Japan, and a co-lead author of the study. “The use of a tissue-free assay offers healthcare systems significant logistical advantages by reducing the burden of tissue handling, as well as a shorter initial turnaround time for the result during the adjuvant decision-making window, while maintaining overall longitudinal performance comparable to previously reported tissue-informed approaches.” Key study findings include: 100% of patients were able to undergo evaluation without the need for tissue testing 98% specificity in samples from patients without recurrence 81% longitudinal sensitivity for recurrence in stage II or higher colon cancer 5.3-month median lead time from ctDNA detection to recurrence “Studies have established an association between the presence of residual disease after surgery and a higher probability of recurrence in early-stage colon cancer,” said Craig Eagle, M.D., Guardant Health chief medical officer. “The COSMOS study provides strong support for the use of the Guardant Reveal test to help inform adjuvant therapy decisions for patients with stage II or III colon cancer and, in post-treatment surveillance, to detect recurrence earlier than standard of care.” The study will be published at 10:00 am EDT on August 7 in Clinical Cancer Research . About Guardant Reveal The first tissue-free test for minimal residual disease (MRD) detection in colorectal cancer, Guardant Reveal is also available for breast and lung cancers. Requiring only a simple blood draw, the test interrogates thousands of epigenomic signals to precisely quantify tumor fraction, offering sensitive and specific MRD results in under 10 days to inform timely clinical decisions in the post-surgery and surveillance settings in early-stage cancer. Guardant Reveal is a Laboratory Developed Test (LDT) with performance characteristics determined by the Guardant Health clinical laboratory in Redwood City, California, which is certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA) as qualified to perform high-complexity clinical testing. This test has not been reviewed or approved by the U.S. Food and Drug Administration (FDA). About Guardant Health Guardant Health is a leading precision oncology company focused on guarding wellness and giving every person more time free from cancer. Founded in 2012, Guardant is transforming patient care and accelerating new cancer therapies by providing critical insights into what drives disease through its advanced blood and tissue tests, real-world data and AI analytics. Guardant tests help improve outcomes across all stages of care, including screening to find cancer early, monitoring for recurrence in early-stage cancer, and treatment selection for patients with advanced cancer. For more information, visit guardanthealth.com and follow the company on LinkedIn , X (Twitter) and Facebook . Forward-Looking Statements This press release contains forward-looking statements within the meaning of federal securities laws, including statements regarding the potential utilities, values, benefits and advantages of Guardant Health’s liquid biopsy tests or assays, which involve risks and uncertainties that could cause the actual results to differ materially from the anticipated results and expectations expressed in these forward-looking statements. These statements are based on current expectations, forecasts and assumptions, and actual outcomes and results could differ materially from these statements due to a number of factors. These and additional risks and uncertainties that could affect Guardant Health’s financial and operating results and cause actual results to differ materially from those indicated by the forward-looking statements made in this press release include those discussed under the captions “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operation” and elsewhere in its Annual Report on Form 10-K for the year ended December 31, 2023, and any current and periodic reports filed with or furnished to the Securities and Exchange Commission thereafter. The forward-looking statements in this press release are based on information available to Guardant Health as of the date hereof, and Guardant Health disclaims any obligation to update any forward-looking statements provided to reflect any change in its expectations or any change in events, conditions, or circumstances on which any such statement is based, except as required by law. These forward-looking statements should not be relied upon as representing Guardant Health’s views as of any date subsequent to the date of this press release. References 1. Nakamura Y, Tsukada Y, Matsuhashi N, et al. Colorectal cancer recurrence prediction using a tissue-free epigenomic minimal residual disease assay. Clin Cancer Res 2024. doi: 10.1158/1078-0432.CCR-24-1651. In press. 2. Samples were collected at day 28 and every 3 to 6 months post-operatively for up to five years or until clinical recurrence.