Terns Pharmaceuticals, Inc. (“Terns” or the “Company”) (Nasdaq: TERN), a clinical-stage biopharmaceutical company developing a portfolio of small-molecule product candidates to address serious diseases, today announced positive top-line data from its Phase 1 randomized, double-blind, placebo-controlled single and multiple-ascending dose (SAD and MAD) trial to assess the safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of TERN-601 dosed once-daily (QD) in healthy adults with obesity or overweight.

The clinical trial results showed TERN-601 was well tolerated and demonstrated dose-dependent, statistically significant placebo-adjusted mean weight loss across all three doses evaluated in the 28-day MAD study, with maximum placebo-adjusted mean weight loss of 4.9% (p<0.0001) at the highest dose of 740 mg QD. Additionally, 67% of participants lost 5% or more of their baseline body weight at the top dose.

“These compelling results underscore TERN-601’s potential to be a class-leading GLP-1R agonist based on its composite profile of initial indications of efficacy, tolerability and manufacturing scalability,” said Amy Burroughs, chief executive officer of Terns. “These data validate the potential of TERN-601 for the treatment of obesity as monotherapy or in combination with agents such as TERN-501, our internally discovered, clinical stage THR-β agonist, or a GIPR modulator from our TERN-800 series. With operational preparations well underway, we look forward to swiftly advancing this promising product candidate into Phase 2 clinical development in 2025.”

“We are delighted to demonstrate potent GLP-1R agonism with TERN-601 as its distinct drug properties allowed for sustained target coverage with once-daily dosing and the evaluation of doses up to 740 mg, while being tolerable,” noted Emil Kuriakose, chief medical officer of Terns. “Importantly, we believe we have successfully identified an optimal range of clinically active, well tolerated doses to take forward in Phase 2 clinical trials, with no new dose range exploration anticipated.”

Table 1: Mean Percent Weight Change from Baseline to Day 28

TERN-601 was well tolerated with no treatment-related dose interruptions, reductions or discontinuations at any dose, despite fast titration to high doses. The majority (>95%) of treatment emergent AEs were mild. All gastrointestinal events were mild to moderate and consistent with the GLP-1R agonist class. Importantly, there were no clinically meaningful changes in liver enzymes, vital signs or electrocardiograms observed. The absence of treatment-related dose interruptions, reductions, or discontinuations with mostly mild AEs, despite aggressive titration to high doses in this 28-day study, indicates potential for further improved tolerability in subsequent studies with slower titration.

TERN-601 has distinct properties that may be advantageous for an oral GLP-1R agonist. Its low solubility and high gut permeability may result in prolonged absorption allowing for sustained target coverage and a flat PK curve, while high drug levels in the gut wall may lead to robust GLP-1R activation in the gut triggering satiety centers in the brain. Additionally, TERN-601 has a low free fraction in circulation which, combined with the flat PK curve, may be allowing TERN-601 to be well tolerated when administered at high doses.

Table 2: Treatment Emergent Adverse Events by Maximum Severity

Terns plans to submit data from this informative clinical trial for presentation at an upcoming scientific conference.

Conference Call and Webcast
Terns will host a conference call for investors today, September 9, 2024, beginning at 8:00 a.m. ET. The live webcast of the conference call can be accessed here. A replay of the call will also be available on the Events page of the Investor Relations section of the Terns website for 30 days.