On May 11, 2026 Pliant Therapeutics, Inc. (Nasdaq: PLRX), a clinical-stage biotechnology company focused on the discovery and development of integrin-based therapeutics, reported a corporate update and announced first quarter 2026 financial results.

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"In the first quarter, our team showcased its clinical development capabilities, initiating FORTIFY, the Phase 1b trial of PLN-101095, ahead of schedule and dosing the first patient in April," said Bernard Coulie, M.D., Ph.D., President and Chief Executive Officer of Pliant. "We were excited to highlight encouraging recent data from the Phase 1a trial of PLN-101095 at AACR (Free AACR Whitepaper) showing deepening responses and increasing time on treatment. The team continues to make progress on pipeline programs emerging from Pliant’s proprietary integrin platform while evaluating opportunities to expand our clinical-stage pipeline."
Oncology Program
PLN-101095 is an oral, small molecule, dual selective inhibitor of αvβ8 and αvβ1 integrins designed to overcome checkpoint resistance by blocking TGF-β activation in the tumor microenvironment. Pliant is currently conducting a Phase 1a/1b open-label, dose-escalation and indication expansion trial (NCT0670706) to evaluate the safety, tolerability, pharmacokinetics, and preliminary evidence of antitumor activity of PLN-101095, as monotherapy and in combination with pembrolizumab, in patients with immune checkpoint inhibitor (ICI)-refractory advanced or metastatic solid tumors.

•FORTIFY, a Phase 1b indication expansion trial, enrolling and dosing patients. In April, the Company announced the dosing of its first participant in the FORTIFY Phase 1b indication expansion trial. The Phase 1b open-label, single dose trial will enroll three cohorts of patients including non-small cell lung cancer (NSCLC), clear cell renal cell carcinoma and a subset of tumors with high tumor mutational burden. Tumor selection was based on data from the Phase 1 trial, as well as strong mechanistic rationale for integrin inhibition. Patients will be treated for 14 days with PLN-101095 dosed at 1,000 mg twice daily as monotherapy, after which pembrolizumab will be added as combination therapy. Enrollment is underway with interim data expected in 2027.

•Oral presentation at AACR (Free AACR Whitepaper) of updated Phase 1 data from PLN-101095 highlighted deepening of confirmed responses. In April, at the Clinical Trials Mini Symposium of the American Association for Cancer Research (AACR) (Free AACR Whitepaper) 2026 Annual Meeting, the Company announced positive updated data from its Phase 1 trial of PLN-101095. Results showed that, in a heavily pretreated patient population, PLN-101095 demonstrated anti-tumor activity in combination with pembrolizumab, an FDA-approved ICI. One confirmed overall complete response, two confirmed overall partial responses, including one patient with a complete response of baseline target lesions, and one unconfirmed partial response were reported. These clinical responses were observed in patients with cholangiocarcinoma, NSCLC, melanoma and head and neck squamous cell carcinoma, respectively. All responding patients showed large increases in plasma interferon gamma (IFN-γ) after 14 days of monotherapy with PLN-101095 prior to the addition of pembrolizumab. At Week 10, all responders maintained more than a 2-fold increase in IFN-γ. No non-responders showed meaningful increases in plasma IFN- γ. PLN-101095 was generally well tolerated across all doses tested. IFN-γ is known to play a multifaceted role in modulating anti-tumor immunity, with increased tumor expression levels having previously been linked with better outcomes from immune checkpoint blockade. In addition to IFN- γ increases, all responding patients showed elevated plasma PD-L1 levels, known to be induced by increased IFN-γ and a predictor of an improved ICI response. Additionally, PLN-101095 was spotlighted as a novel immunotherapy approach as part of AACR (Free AACR Whitepaper)’s 2026 Annual Meeting Highlights Plenary Session.

Integrin-Targeted Delivery Platform

•Utilizing cell-specific integrin receptors, Pliant has developed a platform to deliver drug payloads, including siRNAs, to selective tissue types. Current programs are focused on delivering siRNAs to skeletal muscle cells and other tissues. Preclinical proof-of-concept studies are currently ongoing. The Company believes this integrin-targeting drug-delivery platform has the potential for broad applicability across multiple disease areas utilizing a variety of drug payloads.

First Quarter 2026 Financial Results
•Research and development expenses were $13.6 million, as compared to $43.4 million for the prior-year quarter. The decrease was primarily due to completing close-out activities for BEACON-IPF, a Phase 2b/3 study of bexotegrast, in 2025 and reduced personnel-related expenses, including stock based compensation, driven by decreased headcount compared to prior year.
•General and administrative expenses were $8.2 million, as compared to $15.5 million for the prior-year quarter. The decrease was primarily due to personnel-related expenses, including stock-based compensation, driven by decreased headcount compared to prior year.
•Net loss was $20.0 million as compared to $56.2 million for the prior-year quarter. The decrease was primarily due to significantly lower operating expenses following the termination of bexotegrast development in IPF in 2025 and decreased personnel-related expenses, including stock-based compensation, driven by reduced headcount compared to prior year.
•As of March 31, 2026, the Company had cash, cash equivalents and short-term investments of $172.4 million which the Company expects to be sufficient to fund operations into the second half of 2028.

(Press release, Pliant Therapeutics, MAY 11, 2026, View Source [SID1234665442])