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PLIANT THERAPEUTICS, INC.

(PLRX)
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Pliant Therapeutics : Reports Positive Interim Results from Phase 2a PET Imaging Clinical Trial in Patients with Idiopathic Pulmonary Fibrosis (Form 8-K)

09/07/2021 | 07:42am EDT

Pliant Therapeutics Reports Positive Interim Results from

Phase 2a PET Imaging Clinical Trial in Patients with Idiopathic Pulmonary Fibrosis

- Single dose administration of PLN-74809 achieved αvb6 target engagement

up to 98% in the lungs of IPF patients

- All doses achieved target engagement above the threshold

for predicted anti-fibrotic activity, with an observed dose-response relationship

- PLN-74809 reached highly fibrotic regions of the lung and was bound to αvb6 in IPF patients

- Data provide insight into potential anti-fibrotic activity of PLN-74809 at the doses being evaluated

in the ongoing Phase 2a INTEGRIS-IPF trial

- Company to host conference call and webcast today at 8:00 a.m. ET

SOUTH SAN FRANCISCO, CA- September 7, 2021 - Pliant Therapeutics, Inc. (Nasdaq: PLRX), a clinical stage biotechnology company focused on discovering and developing novel therapeutics for the treatment of fibrosis, today announced positive interim results from a Phase 2a positron emission tomography (PET) imaging-based clinical trial of PLN-74809, an oral small molecule dual selective inhibitor of αvb6vb1, in patients with idiopathic pulmonary fibrosis (IPF). Across four dose levels, all patients achieved greater than 50% target engagement after a single dose of PLN-74809. Target engagement of 50% was previously established in a Phase 1b trial as the threshold for predicted clinical anti-fibrotic effect. In addition, there was a dose- and plasma concentration-dependent response with the two highest doses approaching target saturation.

'We believe the high target engagement levels seen after the administration of just a single dose illustrate the potential of PLN-74809 to show a potent anti-fibrotic effect in our longer-term clinical trials,' said Éric Lefebvre, M.D., Chief Medical Officer of Pliant Therapeutics. 'Furthermore, these data represent a significant step forward in our understanding of the potential anti-fibrotic activity of PLN-74809 and support the selected doses in our ongoing 12-week Phase 2a INTEGRIS-IPF trial.'

The ongoing Phase 2a open-label PET imaging clinical trial is designed to evaluate αvb6 target engagement levels achieved by PLN-74809 when administered across single-doses of 60 mg, 120 mg, 240 mg or 320 mg in IPF patients. The trial is also evaluating safety, tolerability and pharmacokinetics. Patients undergo a PET scan prior to dosing and at four hours post-dose to evaluate target αvb6 specific engagement. Images are analyzed for regions of high fibrotic activity, which are then evaluated for target engagement. Following completion of a standard washout period, patients may consent to receive a second dose of PLN-74809 at a different dose level followed by a second post-dose PET scan.

As fibrosis is a chronic disease, proof-of-efficacy in human trials is expensive and takes years to complete. Pliant utilizes pharmacodynamic biomarkers and advanced imaging techniques, including PET, to evaluate target engagement by our product candidates over relatively short time periods and de-risk Pliant's programs by designing clinical trials that allow the Company to show proof-of-mechanism in advance of clinical efficacy data.

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Interim Phase 2a PET Clinical Trial Results

Four IPF patients were administered six single doses of PLN-74809 across 60 mg, 120 mg, 240 mg or 320 mg, generating a total of six post-dose scans.

Target Engagement by Dose

*  Free plasma concentration

Target Engagement by Plasma Concentration

PLN-74809 Demonstrated Lung Penetration, with Greater than 50% Target Engagement Achieved in the Lungs of All IPF Patients Across All Dose Cohorts

Up to 98% target engagement of PLN-74809 achieved

Greater than 50% target engagement of PLN-74809 achieved across all doses

Dose and Plasma Concentration Response Established

PLN-74809 achieved a dose response across all single-doses from 60 mg to 320 mg

Suggests target engagement levels along the entire exposure curve of PLN-74809

Supports potential anti-fibrotic activity of PLN-74809 at the doses being evaluated in the ongoing Phase 2a INTEGRIS-IPF trial

PLN-74809 Well-Tolerated Across All Doses

No serious adverse events reported

Conference Call and Webcast

Pliant will host a conference call and webcast today at 8:00 a.m. ET to discuss this update. The webcast will be available in the Events & Presentations section of Pliant's website. This update can also be accessed by dialing (833) 519-1340 (United States and Canada) or (914) 800-3902 (international) and providing the passcode 6186023. An archived reply of the webcast will be available on Pliant's website for 90 days following the event.

2

About Pliant Therapeutics, Inc.

Pliant is a clinical stage biopharmaceutical company focused on discovering and developing novel therapies for the treatment of fibrotic and related diseases. Pliant's lead product candidate, PLN-74809, is an oral small-molecule dual selective inhibitor of αvß6 and αvß1 integrins that is in development for the treatment of idiopathic pulmonary fibrosis, or IPF, and primary sclerosing cholangitis, or PSC. PLN-74809 has received Orphan Drug Designation from the U.S. Food and Drug Administration for both IPF and PSC. Pliant is currently recruiting for Phase 2a trials of PLN-74809 in the lead indications of IPF and PSC. Pliant has also developed PLN-1474, a small-molecule selective inhibitor of αvß1 for the treatment of nonalcoholic steatohepatitis, or NASH with liver fibrosis, which Pliant has transferred to Novartis pursuant to its development partnership. In addition to clinical stage programs, Pliant currently has two preclinical programs targeting oncology and muscular dystrophies. For additional information about Pliant, visit www.pliantrx.com and follow us on Twitter, LinkedIn, Facebook, and YouTube.

Forward-Looking Statements

Statements contained in this press release regarding matters that are not historical facts are 'forward-looking statements' within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as 'may,' 'will,' 'expect,' 'anticipate,' 'estimate,' 'intend,' and similar expressions (as well as other words or expressions referencing future events, conditions, or circumstances) are intended to identify forward-looking statements. These statements include those regarding the pharmacodynamics and therapeutic potential of PLN-74809, our plans for the future development of PLN-74809, the potential of our Phase 2a PET trial to predict future clinical outcomes and the potential for the preliminary results of this trial to predict future results. Because such statements deal with future events and are based on our current expectations, they are subject to various risks and uncertainties and actual results, performance or achievements of Pliant Therapeutics could differ materially from those described in or implied by the statements in this press release. These forward-looking statements are subject to risks and uncertainties, including those related to the development and commercialization of our product candidates, including any delays in our ongoing or planned preclinical or clinical trials, the ongoing nature of our Phase 2a PET trial and the possibility that the preliminary data will not be predictive of full data from this trial, the possibility that results from this trial will not be predictive of future clinical outcomes, the impact of the ongoing COVID-19 pandemic on our business, operations, clinical supply and plans, the risks inherent in the drug development process, the risks regarding the accuracy of our estimates of expenses and timing of development, our capital requirements and the need for additional financing, and our ability to obtain and maintain intellectual property protection for our product candidates. These and additional risks are discussed in the sections titled 'Risk Factors' and 'Management's Discussion and Analysis of Financial Condition and Results of Operations' in our Annual Report on Form 10-K filed with the SEC on March 16, 2021, as updated by our Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, each available on the SEC's website at www.sec.gov. Unless otherwise noted, Pliant is providing this information as of the date of this news release and does not undertake any obligation to update any forward-looking statements contained in this document as a result of new information, future events, or otherwise.

3

Investor and Media Contact:

Christopher Keenan

Vice President, Investor Relations and Corporate Communications

Pliant Therapeutics, Inc.

ir@pliantrx.com

4

Disclaimer

Pliant Therapeutics Inc. published this content on 07 September 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 07 September 2021 11:41:02 UTC.


© Publicnow 2021
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Sales 2021 8,98 M - -
Net income 2021 -97,3 M - -
Net Debt 2021 - - -
P/E ratio 2021 -6,38x
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Capitalization 617 M 617 M -
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Bernard Coulie President, Chief Executive Officer & Director
Keith Lamont Cummings Chief Financial Officer
Ho Young Huh Chairman
Eric Lefebvre Chief Medical Officer
Gregory P. Cosgrove Vice President-Clinical Development
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