This study is open-label dose expansion study to investigate the safety and toxicity of intravesical treatment of high-grade NMIBC (HGTa or CIS, including CIS with concomitant Ta) after transurethral resection of bladder tumor (TURBT) and/or biopsy using TARA-002 in adults unable to obtain intravesical Bacillus Calmette-Guérin (BCG), adults who have received at least one dose of intravesical BCG or adults who have received at least one dose of intravesical chemotherapy. After completion of the dose escalation phase (Phase 1a) and after the RP2D has been established, the dose expansion phase (Phase 1b) will start enrollment of subjects with CIS NMIBC with active disease to further evaluate the safety and preliminary efficacy of TARA-002, at the established RP2D. CIS NMIBC with active disease is defined as disease present at the last cystoscopic evaluation prior to signing the ICF. Subjects enrolled in the dose expansion phase will not include subjects previously enrolled and treated in the dose escalation phase. All subjects will receive 6 weeks of treatment at the established RP2D.



Eligible Ages
Over 18 Years
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

  • Male or female subjects 18 years of age or older at the time of signing the informed consent - Subjects who have voluntarily given written informed consent after the nature of the study has been explained according to applicable requirements prior to study entry - Subjects with a histologically confirmed, high-grade Ta or CIS (including CIS with concomitant Ta) urothelial cell carcinoma of the bladder according to central review - Subjects who are treatment naïve, unable to obtain intravesical BCG for the treatment of NMIBC, have received at least one dose of intravesical BCG, or at least one dose of intravesical chemotherapy

Exclusion Criteria

  • Penicillin allergy (subjects with a questionable history of allergy to penicillin or no history of penicillin use will undergo penicillin allergy testing prior to inclusion in the study) - Predominant (defined as > 50%) adenocarcinoma, squamous cell carcinoma, or histological variants including plasmacytoid, sarcomatoid, or squamous components according to central review - Concomitant prostatic or upper tract urothelial involvement per Investigator's assessment - Nodal involvement or metastatic disease that existed at any time (past or present disease) - Bladder cancer stage ≥ T1 within the last 36 months according to central histology review - Bladder cancer stage CIS with concomitant T1 For more information on eligibility criteria, please contact the sponsor.

Study Design

Phase 1
Study Type
Intervention Model
Single Group Assignment
Intervention Model Description
All subjects will receive 6 weekly doses of TARA-002 at the recommended Phase 2 dose (R2PD)
Primary Purpose
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
TARA-002 is a lyophilized biological preparation for instillation containing cells of Streptococcus pyogenes (Group A, type 3) Su strain treated with benzylpenicillin.
  • Biological: TARA-002
    Phase 1b, Dose Expansion Phase: All subjects will receive 6 weekly doses of TARA-002 at the recommended Phase 2 dose (R2PD)

Recruiting Locations

UT Health San Antonio
San Antonio, Texas 78229
Use Central Contact

More Details

Protara Therapeutics

Study Contact

Chief Scientific Operations Officer


Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.