Highlights FORTIFY, the Phase 1b indication expansion trial of PLN-101095

enrolling patients with ICI-refractory solid tumors

SOUTH SAN FRANCISCO, Calif., May 21, 2026 (GLOBE NEWSWIRE) -- Pliant Therapeutics, Inc. (NASDAQ:PLRX) today announced a presentation at the upcoming 2026 American Society of Clinical Oncology (ASCO) Annual Meeting taking place in Chicago, Illinois from May 29 to June 2, 2026.

Poster Presentation

Title: Cohort Expansion of a Phase I Study of PLN-101095, a First-in-Class Dual αvβ8 /αvβ1 Integrin Inhibitor, in Combination with Pembrolizumab in Patients with Advanced Solid Tumors Refractory to Immune Checkpoint Inhibitors

Presenter:	Timothy A. Yap, MBBS, Ph.D., University of Texas, M.D. Anderson Cancer Center
Session:	Developmental Therapeutics – Immunotherapy
Date:	Saturday, May 30, 2026, 1:30 – 4:30 p.m. Central Time
Location:	Hall A, Poster 467b

FORTIFY - PLN-101095 Phase 1b Indication Expansion Trial

PLN-101095 is currently being evaluated in Phase 1a/1b open-label, dose-escalation and indication expansion trial (NCT06270706) to evaluate the safety, tolerability, pharmacokinetics, and preliminary evidence of antitumor activity of PLN-101095 when administered orally in combination with pembrolizumab, in patients with immune checkpoint inhibitor (ICI)-refractory advanced or metastatic solid tumors. Pliant is currently enrolling patients in FORTIFY, a Phase 1b open-label, indication expansion trial enrolling three cohorts of patients with non-small cell lung cancer (NSCLC), tumors with high tumor mutational burden or clear cell renal cell carcinoma. 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.

About Pliant Therapeutics, Inc.

Pliant Therapeutics is a clinical-stage biopharmaceutical company focused on the discovery and development of integrin-based therapeutics. Pliant's lead program is PLN-101095, an oral, small molecule, dual-selective inhibitor of α_vß₈ and α_vß₁ integrins, that is being developed for the treatment of ICI-refractory advanced or metastatic solid tumors. PLN-101095 is being investigated in FORTIFY, a Phase 1b indication expansion trial enrolling patients with NSCLC, tumors with high tumor mutational burden or clear cell renal cell carcinoma. Pliant's preclinical research is focused on tissue-specific delivery and internalization of drug payloads utilizing integrin receptor-binding molecules with programs focused on delivering siRNAs to skeletal muscle cells, adipocytes, and renal cells.

For additional information on Pliant, visit www.PliantRx.com and follow us on X, LinkedIn and Facebook.

Investor and Media Contact:

Christopher Keenan

Vice President, Investor Relations and Corporate Communications

Pliant Therapeutics, Inc.

ir@pliantrx.com

Pliant Therapeutics Announces Upcoming Presentation at the 2026 American Society of Clinical Oncology Annual Meeting