TNXP News & Events

Tonix Pharmaceuticals announced the publication of a paper, "First-in-Human, Phase 1, Randomized, Double-Blind, Placebo-Controlled Study of TNX-1500, an Fc-Modified anti-CD154 Monoclonal Antibody, Evaluating the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Single-Ascending Doses in Healthy Adults," in the peer-reviewed Journal of Clinical Immunology. TNX-1500 is an investigational, third-generation Fc-modified IgG4 anti-CD40L monoclonal antibody in development for the prevention of organ transplant rejection and the treatment of autoimmune diseases. The publication reports findings from a single-center, first-in-human, Phase 1, randomized, double-blind, placebo-controlled, single-ascending dose escalation study in 26 healthy adult volunteers. Participants were enrolled across three ascending dose cohorts or placebo and received a single intravenous infusion of TNX-1500 or placebo, followed by intramuscular injections of KLH on days 2 and 29 to assess the TDAR, and monitored over a 120-day follow-up period. TNX-1500 blocked the primary T cell-dependent antibody response to KLH at all doses, blocked the secondary response at the 10 and 30 mg/kg doses, and reduced peak secondary response to KLH by ~70% relative to placebo at the 3 mg/kg dose. TNX-1500 was generally well tolerated, with no serious adverse events, and no discontinuations due to adverse events. The only treatment-emergent adverse event deemed possibly related to study drug was aphthous ulcer, which occurred in 1 participant in each of the three TNX-1500 groups; all TEAEs were rated as mild and resolved in 2-10 days. No TEAEs were determined to be related to KLH administration. There were no administration or injection site reactions. Pharmacokinetic analyses suggested approximately dose-proportional exposure across the 3 to 30 mg/kg range, with mean terminal elimination half-lives of 37.8 and 33.8 days at the 10 and 30 mg/kg dose levels, respectively. TNX-1500 at 10 and 30 mg/kg blocked the primary and secondary anti-KLH TDAR through day 120, and at 3 mg/kg reduced the peak secondary response by approximately 70% relative to placebo. Across all dose cohorts, TNX-1500 was associated with a rapid and sustained reduction in soluble CD40L over the 120-day study period.

Reports Q1 revenue $6.9M vs. $2.4M last year. "TONMYA is the first new fibromyalgia medicine in 15 years," said Seth Lederman, M.D., Chief Executive Officer of Tonix Pharmaceuticals. "TONMYA is a non-opioid analgesic designed for bedtime administration and long-term use by adults. Since launch in November 2025, TONMYA has shown growth in prescriptions, new writers, refills, and patient access. Our first managed care partnership was announced in May, providing access to approximately 35 million U.S. commercial lives. We will continue engagement with commercial and government payers to expand patient access. Our focus remains on operational excellence across sales, marketing, medical affairs, and market access to educate and deliver on TONMYA's differentiated potential. We also continue to meaningfully advance our mid-stage clinical programs and our earlier-stage pipeline. For TNX-4800, our investigational long-acting borreliacidal, human monoclonal antibody targeting OspA on Borrelia burgdorferi, which causes the majority of Lyme disease in the U.S., we announced positive Phase 1 data and plans for an adaptive Phase 2 field study in 2027, pending FDA agreement. We look forward to our scheduled Type C meeting with the FDA early in the third quarter of 2026 to discuss the study. We believe TNX-4800 offers several advantages over vaccines in development, including onset of protection within two days and a simpler two-dose regimen with a second booster dose two months after the first. We also expect to begin our Phase 2 study of TONMYA for the treatment of Major Depressive Disorder mid-year. Our other programs across CNS, infectious disease, immunology, and rare disease remain well positioned for near-term milestones."