Pliant Therapeutics' Investigational Cancer Drug Shows Antitumor Activity Across Multiple Tumor Types
Trial Results: Pliant Therapeutics reported positive interim results from its Phase 1 trial of PLN-101095 combined with Merck's Keytruda, showing a 50% objective response rate in patients with advanced solid tumors at the highest tested dose of 1000 mg BID.
Patient Tolerance and Progress: The treatment was generally well tolerated across all doses, with confirmed partial responses observed in various tumor types, including Non-Small Cell Lung Cancer, Cholangiocarcinoma, and Melanoma, while the trial continues to enroll participants for further cohorts.
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- Merck & Co. Announcement: Merck & Co. has set a target action date of August 17, 2026, for its product under review by the FDA.
- FDA Review Process: The announcement indicates that the FDA is currently evaluating Merck's submission, with a decision expected by the specified date.

FDA Grants Priority Review: The FDA has granted priority review for two drugs, Keytruda® (pembrolizumab) and Keytruda QLEX™ (pembrolizumab and berahyaluronidase), aimed at treating muscle-invasive bladder cancer.
Indication for Eligible Patients: These treatments are specifically for patients with muscle-invasive bladder cancer who are eligible for cisplatin-based chemotherapy.
- Trial Outcome: The LITESPARK-012 trial conducted by Merck and Eisai failed to meet its primary endpoints of progression-free survival (PFS) and overall survival (OS) in kidney cancer patients, which could negatively impact future treatment strategies for both companies.
- Patient Enrollment: Over 1,600 patients were enrolled in the trial, testing various drug combinations including Keytruda and Lenvima, but failed to demonstrate superiority over the already approved Keytruda plus Lenvima regimen, indicating a lack of efficacy for the new therapies.
- Safety Profile: Although the combination therapies did not meet the primary endpoints, the companies noted that their safety profiles were consistent with past results for individual drugs, suggesting no new significant risks emerged, which still holds some value for future clinical applications.
- Market Implications: The failure of this trial may affect Merck's market position in kidney cancer treatment, especially ahead of the Keytruda patent cliff, forcing the company to accelerate other R&D projects to maintain competitiveness.
- Stake Increase: Dagco added 451,240 shares of Sellas Life Sciences on Tuesday, bringing its total holdings to 1.03 million shares valued at $4.35 million, making it the second-largest holding at 1.01% of its portfolio, indicating strong confidence in Sellas' future prospects.
- Clinical Data Catalyst: Sellas is set to present preclinical data on SLS009 at the AACR conference, targeting acute myeloid leukemia (AML), with lab studies showing that it induces leukemia cell death by enhancing caspase-3 activity, potentially offering new treatment options for AML patients.
- Regal Trial Progress: The Phase 3 Regal trial has recorded 72 survival events, moving closer to the 80-event threshold for final analysis, with the CEO suggesting that the slower accumulation of events may indicate longer patient survival, further heightening investor expectations.
- Optimistic Market Sentiment: Retail sentiment for SLS on Stocktwits is deemed 'extremely bullish' amid high message volume, with investors generally optimistic about the potential of SLS009, reflecting positive market expectations for Sellas' future developments.

- FDA Priority Review: Pfizer and Astellas announced that the FDA has granted priority review for their marketing application of Padcev in combination with Merck's Keytruda, marking a significant advancement in bladder cancer treatment.
- Indication Expansion: The application aims to expand the use of Padcev with Keytruda to all muscle-invasive bladder cancer patients, not just those ineligible for cisplatin chemotherapy, which is expected to significantly broaden the potential market.
- Clinical Trial Success: This application is based on data from the Phase 3 EV-304 trial, which successfully met its primary endpoint of event-free survival, providing strong support for FDA approval of the therapy.
- Target Action Date: The FDA has set August 17, 2026, as the target action date for the supplemental Biologics License Application, and if approved, it will offer new treatment options for patients, further solidifying Pfizer and Astellas' market position in oncology.

- Clinical Trial Results: The Phase 3 KEYNOTE-B15 trial demonstrated that the combination of KEYTRUDA and Padcev significantly improved event-free survival and overall survival in muscle-invasive bladder cancer (MIBC) patients, indicating its potential efficacy.
- FDA Priority Review: The U.S. FDA has granted priority review for the supplemental Biologics License Applications (sBLA) for KEYTRUDA and KEYTRUDA QLEX, which, if approved, would be the first perioperative treatment for all MIBC patients, potentially changing the standard of care.
- Patient Recruitment: The KEYNOTE-B15 trial enrolled 808 patients to compare the perioperative treatment of KEYTRUDA combined with Padcev against traditional chemotherapy, aiming to assess its efficacy and safety before and after surgery.
- Future Outlook: If approved, the indications for KEYTRUDA and KEYTRUDA QLEX will expand to all MIBC patients, further solidifying Merck's leadership in oncology immunotherapy and providing new treatment options for patients.








