Merck expands trials of tulisokibart to three new inflammatory diseases

Published 06/10/2025, 11:54
Merck expands trials of tulisokibart to three new inflammatory diseases

RAHWAY, N.J. - Merck (NYSE:MRK), a prominent player in the pharmaceutical industry with a market capitalization of $222.78 billion and an impressive gross profit margin of 77.41%, has initiated three Phase 2b clinical trials to evaluate tulisokibart, its investigational anti-TL1A monoclonal antibody, in patients with hidradenitis suppurativa, radiographic axial spondyloarthritis, and rheumatoid arthritis, according to a company press release. InvestingPro analysis indicates the company is currently trading below its Fair Value, suggesting potential upside opportunity.

The expansion adds to Merck’s ongoing Phase 3 studies of the drug in ulcerative colitis and Crohn’s disease, as well as a Phase 2 study in systemic sclerosis-associated interstitial lung disease.

Global recruitment has begun for the three new trials, which aim to enroll more than 640 patients across all studies. The trials will assess the safety and efficacy of tulisokibart in these additional immune-mediated inflammatory conditions.

Tulisokibart is designed to target tumor necrosis factor-like cytokine 1A (TL1A), a protein associated with inflammation and fibrosis. The drug is believed to inhibit inflammatory pathways and potentially reduce intestinal fibrosis, which could be important in altering disease progression.

"The expansion of our tulisokibart clinical development program reflects Merck’s ongoing commitment to addressing the burden of immune-mediated inflammatory diseases," said Dr. Aileen Pangan, vice president and head of immunology at Merck Research Laboratories, in the statement.

Hidradenitis suppurativa is a chronic inflammatory skin condition affecting hair follicles, with prevalence estimates ranging from 0.1% to 0.8% of the population. Radiographic axial spondyloarthritis causes inflammation in the spine and affects approximately 0.1% to 1% of people worldwide. Rheumatoid arthritis, which affects joints and potentially other body systems, impacts an estimated 17.9 million people globally.

The company did not provide timelines for when results from these new trials might be expected. Trading at a P/E ratio of 13.83, Merck presents an attractive valuation relative to its peers. For deeper insights into Merck’s financial health and growth potential, investors can access comprehensive analysis through InvestingPro, which offers detailed research reports and additional ProTips for informed decision-making.

In other recent news, Merck announced that its pulmonary arterial hypertension drug WINREVAIR reduced the risk of clinical worsening events by 76% in newly diagnosed patients, as revealed in the Phase 3 HYPERION trial. The results were presented at the European Respiratory Society Congress and published in the New England Journal of Medicine. Additionally, the European Medicines Agency’s Committee for Medicinal Products for Human Use recommended approval of Merck’s RSV antibody, ENFLONSIA, for preventing respiratory syncytial virus in newborns and infants. Merck’s KEYTRUDA also received positive opinions from the same committee for a new subcutaneous administration route and a new indication. Meanwhile, Evaxion Biotech announced that MSD, known as Merck & Co. in the U.S., has licensed its vaccine candidate EVX-B3, granting Evaxion $7.5 million upfront and eligibility for up to $592 million in milestone payments. In another development, the pharmaceutical industry group PhRMA announced $500 billion in new U.S. investments, projected to create 100,000 jobs, including 25,000 in the pharmaceutical sector. These investments are reportedly supported by tax reforms and streamlined regulations.

This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.

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