Protara Therapeutics Inc【TARA】株式ニュース

Protara Therapeutics Announces Updated Interim Data from Phase 2 ADVANCED-2 Trial of TARA-002 in BCG-Naïve NMIBC Patients
December 03 2025 - 8:00AM

Protara Therapeutics, Inc. (Nasdaq: TARA), a clinical-stage company developing transformative therapies for the treatment of cancer and rare diseases, today announced updated interim data from the ongoing Phase 2 open-label ADVANCED-2 trial of TARA-002 in patients with carcinoma in situ or CIS (± Ta/T1) non-muscle invasive bladder cancer (NMIBC). These results in Bacillus Calmette-Guérin (BCG)-Naïve NMIBC patients will be featured during a poster session at the 26th Annual Meeting of the Society of Urologic Oncology (SUO) in Phoenix, Arizona.
“These positive results continue to support TARA-002’s potential in the NMIBC treatment landscape, and we look forward to finalizing a regulatory pathway for TARA-002 in BCG-Naïve patients,” said Jesse Shefferman, Chief Executive Officer of Protara Therapeutics. “We remain on track to provide an update on the registrational BCG-Unresponsive patient cohort in the ADVANCED-2 trial in the first quarter of 2026 and expect to complete enrollment of this cohort in the second half of 2026.”

“These encouraging TARA-002 results demonstrate meaningful and durable activity in BCG-Naïve NMIBC patients,” said Mark Tyson, M.D., MPH, Vice Chair for Research and a Professor in the Department of Urology with the Mayo Clinic in Phoenix, Arizona, and ADVANCED-2 study investigator. “The clinically meaningful response rates at six and 12 months, coupled with a favorable safety and tolerability profile and simple administration that is even more streamlined than BCG, make TARA-002 a compelling potential treatment option in the BCG-Naïve setting.”

Updated Interim Results

The dataset includes 31 BCG-Naïve patients who received at least 1 dose of TARA-002; 29 patients completed at least one response assessment and were evaluable for efficacy as of a November 7, 2025 data cutoff. Patients received an induction course of six weekly intravesical instillations of TARA-002, followed by a maintenance course of three weekly instillations every three months. Re-induction was permitted for eligible patients with residual CIS and/or recurrent high-grade Ta disease. Complete response (CR) rates at the six months and 12 months landmark time points include all participants who were either evaluable at that time point or had experienced disease progression or treatment failure prior to the scheduled visit.

The CR rate at any time was 72% (21/29).
The CR rate was 69% (18/26) at six months and 50% (7/14) at 12 months.
Among initial responders, 88% (14/16) maintained their response through six months and 100% (3/3) through 12 months.
Re-induction therapy successfully salvaged most initial non-responders, resulting in high conversion rates and durable responses: 80% (4/5) of re-induced patients converted to a CR at 6 months, and 100% (4/4) of those responders maintained their CR at 12 months.
Safety and Tolerability

The majority of treatment-related adverse events (TRAEs) were Grade 1 and transient with no Grade 3 or greater TRAEs as assessed by study investigators. No patients discontinued treatment due to TRAEs. The most commonly occurring TRAEs were dysuria (13%), fatigue (13%), and hematuria (6%).

Regulatory Update

The Company remains in ongoing dialogue with the U.S. Food and Drug Administration (FDA) on an expansion of the agreed upon registrational path forward for TARA-002 beyond the BCG-Unresponsive NMIBC patient population. The FDA has provided written feedback supporting a registrational design for a controlled trial in BCG-Naïve patients (who have never been exposed and those who have not received BCG within the last 24 months and are ineligible to receive BCG or contraindicated, cannot tolerate BCG, do not have access to BCG, or refuse BCG). The FDA has agreed that BCG is not required as a comparator and that intravesical chemotherapy is an acceptable comparator to TARA-002 in BCG-Naïve patients. The FDA also is aligned with the primary endpoint of the trial as the CR rate at month 6 with duration of response as a key secondary endpoint. The Company has engaged the FDA to determine how to include BCG-Exposed patients in its clinical trials of TARA-002, for whom no FDA-approved treatments are available and who have limited options to access investigational treatment through clinical trials.

About ADVANCED-2

ADVANCED-2 (NCT05951179) is a Phase 2 open-label trial assessing intravesical TARA-002 in NMIBC patients with carcinoma in situ or CIS (± Ta/T1) who are Bacillus Calmette-Guérin (BCG)-Unresponsive (Cohort B N=75-100) or BCG-Naïve (Cohort A N=31). Trial subjects received an induction course, with or without a reinduction, of six weekly intravesical instillations of TARA-002, followed by a maintenance course of three weekly instillations every three months.

The Company remains on track to report interim results from approximately 25 six-month evaluable NMIBC patients from ADVANCED-2 with carcinoma in situ or CIS (± Ta/T1) who are BCG-Unresponsive in the first quarter of 2026 and expects to complete enrollment in this cohort in the second half of 2026.