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Study of a new treatment (161Terbium PSMA-617) for patients whose prostate cancer has returned

161Terbium PSMA 617 in prostate carcinoma patients with Biochemical recurrence following radical local treatment Phase I feasibility study (TerBo study) - TerBo

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
CTRI
Registry ID
CTRI/2026/05/111159
Enrollment
10
Registered
2026-05-26
Start date
Unknown
Completion date
Unknown
Last updated
2026-06-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Health Condition 1: C61- Malignant neoplasm of prostate

Interventions

Intervention1: 161 Terbium PSMA radioligant therapy (161Tb PSMA): Patients will receive 1 cycle of 161Tb PSMA 617 (135-150 mCi) via IV infusion over 10-15 minutes under proper radiation safety protoco

Sponsors

Mr Sunil K Gupta
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: 1. Biopsy proven adenocarcinoma of the prostate 2. Patients underwent radical surgery or radiotherapy as primary treatment 3. Fulfils the definition of biochemical recurrence a) For patients who have undergone radical prostatectomy 2 consecutive PSA values >0.2 ng/ml b) For patients who undergone radical radiotherapy, PSA elevation>2 ng/ml above the PSA nadir or absolute PSA value >1.5 ng/ml in two consecutive PSA measurements 4. Negative 68Ga PSMA PET/CT for recurrence

Exclusion criteria

Exclusion criteria: 1. Neuroendocrine/small cell differentiation in biopsy samples, at the time of diagnosis 2. Poor renal function serum creatinine greater than 1.6mg/dl or a creatinine clearance lesser than 40 ml/min. 3. Compromised bone marrow function-a) Hemoglobin level lesser than 9 g/dl b) Platelets less than 1,00,000 per cubic milliliter c) WBC count less than 2000 millilitre. 4. Compromised liver function -Total bilirubin level more than 1.5 times the normal 5. Patient has received chemotherapy

Design outcomes

Primary

MeasureTime frame
PSA50 response rate: It is defined as a PSA reduction of 50 percentage or more from pre-treatment value done after 6 weeks from the treatment, maintained on two evaluations at least 3 weeks apart.Timepoint: PSA50 response rate: It is defined as a PSA reduction of 50% or more from pre-treatment value done after 6 weeks from the treatment, maintained on two evaluations at least 3 weeks apart.

Secondary

MeasureTime frame
a)PSA progression free survival: PSA progression will be defined as a rise of greater than 25% above either the pretreatment level or the nadir PSA level (whichever is lowest) b)Metastasis-free Survival (MFS): MFS will be defined as the duration of time in months between patient recruitment and the earliest objective evidence of radiographic progression c)Adverse effect estimation: All toxicities will be evaluated with the help of CTCAE version 5.0.Timepoint: a) For PSA progression free survival and metastasis free survival: Till two years from the dtae of treatment b) Adverse effect estimation: Week 2, week 4, week 6, week 12 and week 24 from the date of treatment

Countries

India

Contacts

Public ContactSayak Choudhury

Advanced Centre for Treatment, Research and Education in Cancer (ACTREC)

choudhurysayak91@gmail.com7738714626

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Jun 11, 2026