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Pasithea Therapeutics Announces Positive Safety Review Committee (SRC) Recommendation from its ongoing Phase 1 Clinical Trial of PAS-004 in Advanced Cancer

Key Takeaway: Pasithea Therapeutics Corp. announced a positive recommendation from the Safety Review Committee for its Phase 1 clinical trial of PAS-004 in advanced cancer, allowing the trial to proceed to the next dose level of 22mg. The recommendation came after reviewing safety data indicating no adverse events, including dose-limiting toxicities or rash, in the participants thus far. Chief Executive Officer Dr. Tiago Reis Marques expressed optimism regarding the safety profile and potential implications of PAS-004 for treating neurofibromatosis type 1 and other cancers, with further pharmacokinetic and pharmacodynamic data expected to be presented in Q1 2025.
Price reaction · baseline $2.08 (2025-02-04 close) · hit after-hours · clean, no other KTTA news in the window
day 0 close
+31.7%
day 1
+2.9%
day 3
-21.2%

Market Sentiment Analysis

POSITIVE FACTORS

  • Safety Review Committee recommended escalating to the next dose level of 22mg.
  • No dose-limiting toxicities or rash observed in the trial participants.
  • The differentiated profile of PAS-004 shows potential to change treatment paradigms for patients.

BiopharmaWatch Analysis

From our catalyst data and publicly available data · not financial advice
Best trade, last catalyst
+117%
120-day peak, hindsight
Typical move
3.2%
average across 3 past catalysts
Cash runway
~29 mo
Minimal dilution risk
Lead asset
PAS-004
Phase 1 · RAS Mutation

Full Press Release Details

SRC recommended that the trial escalate to the next dose level of 22mg capsule
No dose-limiting toxicities (DLT’s) or rash observed to date in either capsule or tablet formulations
MIAMI, Feb. 05, 2025 (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 that the external Safety Review Committee recommended that the Company’s Phase 1 clinical trial of PAS-004 in advanced cancer should proceed to cohort 5, 22mg capsule, without modification. This recommendation was based on the review of the safety data from three patients in cohort 4A (15mg capsule) and the absence of any dose limiting toxicities (DLT’s). In addition, no rash has been observed to date in any of the first 14 patients who have been dosed with PAS-004 in either capsule (12 patients) or tablet (2 patients) formulation. Rash is a common adverse event (AE) that is observed at low doses with competitor MEK inhibitors and may lead to the high discontinuation rate in real world practice.
“As we are observing substantial exposure levels of PAS-004, we remain encouraged by the safety profile PAS-004 continues to exhibit,” stated Dr. Tiago Reis Marques, Chief Executive Officer of Pasithea. “With the differentiated profile of PAS-004, we believe it is possible that this highly specific macrocyclic MEK inhibitor with a half life of greater than 60 hours may change the treatment paradigm for patients with NF1 and inoperable plexiform neurofibromas. We are looking forward to presenting updated pharmakokinetic (PK) and pharmacodynamic (PD) data during Q1 2025.”
The ongoing 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).
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), pharmacodynamics (PD) 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

Frequently Asked Questions

What was SRC's recommendation for PAS-004 dosage?

SRC recommended escalating the trial to a 22mg capsule dosage.

Have any dose-limiting toxicities been observed?

No dose-limiting toxicities have been observed in any formulation to date.

What indication is PAS-004 being developed for?

PAS-004 is being developed for neurofibromatosis type 1 and other cancers.

How many patients have been dosed with PAS-004?

Fourteen patients have been dosed with PAS-004 so far.

What is the trial design for PAS-004's Phase 1 study?

The study is a multi-center, open-label, dose escalation 3+3 design.

Last updated: Feb 5, 2025