DRUG
Triptorelin pamoate (embonate) salt
Triptorelin pamoate 22.5 mg (6-month formulation), i.m. injection, single dose on Day 1.
Status
Completed
Phase
Phase 3
Enrollment
195
Locations
36
Results
Posted
Publications
0
Study summary
The main aim of this study is to assess the effectiveness and safety of the 6-month formulation of triptorelin pamoate in Chinese participants with locally advanced or metastatic cancer of the prostate. Participants will receive 1 injection of triptorelin pamoate 6-month formulation.
Interventions
DRUG
Triptorelin pamoate 22.5 mg (6-month formulation), i.m. injection, single dose on Day 1.
Timeline
First posted
Oct 21, 2022
Study start
Nov 17, 2022
Primary completion
Aug 20, 2024
Study completion
Aug 20, 2024
Results posted
Sep 9, 2025
Registry updated
Sep 9, 2025
Outcomes
Percentage of Participants Who Achieved Castrate Levels of Serum Testosterone on Day 29
Time frame · Day 29
Blood samples were collected to determine the serum testosterone concentrations using a validated, specific and sensitive liquid chromatography tandem mass spectrometry (LC-MS/MS) method. Achievement of testosterone castration was defined as serum testosterone level \<50 nanograms per deciliter (ng/dL) or 1.735 nanomoles/liter (nmol/L). Percentages are rounded off to the tenth decimal place.
Percentage of Participants Who Maintained the Castrate Levels From Week 8 to Week 24
Time frame · From Week 8 to Week 24
Blood samples were collected to determine the serum testosterone concentrations using a validated, specific and sensitive LC-MS/MS method. Maintenance of castration was defined as serum testosterone level \<50 ng/dL or 1.735 nmol/L.
Number of Participants With Treatment-Emergent Adverse Events (TEAEs), Treatment-Emergent Serious Adverse Events (TESAEs) and Treatment-Emergent Adverse Events of Local Tolerance
Time frame · From the first dose of study intervention (Day 1) up to end of study visit (Week 24), approximately 169 days
An AE was any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An SAE was any untoward medical occurrence that, at any dose, resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital abnormality/birth defect, or any other medically important event. TEAEs were AEs with start date on or after the date of study intervention administration and up to 24 weeks after date of first dose of treatment. Local tolerance was assessed 2 hours (+/-15 minutes) after the single injection of 6-month formulation triptorelin by examination of injection site for signs including but not limited to tenderness, erythema, swelling, hematoma, rash, pain, itching and induration.
Percent Change From Baseline in Prostate Specific Antigen (PSA) at Weeks 12 and 24
Time frame · Baseline (Day 1), Weeks 12 and 24
Blood samples were collected for the measurement of plasma PSA concentrations. Percent change in PSA was defined as the absolute value of difference between the PSA values at Week 12 and Week 24 and the baseline value divided by the baseline value. Baseline was defined as the last non-missing measurement taken prior to first study intervention administration.
Time to Maximum Observed Plasma Concentration (Tmax) of Triptorelin Pamoate
Time frame · Pre-dose, 1, 2, 3, 4, 6, 8, 12, 24, 48, 96 and 168 hours post-dose on Day 1, Days 15, 22, 29, 57, 85, 113, 141 and 169
Blood samples were collected at specified timepoints for the assessment of tmax of triptorelin pamoate. The PK parameters were performed using non-compartmental analysis.
Maximum Observed Plasma Concentration (Cmax) of Triptorelin Pamoate
Time frame · Pre-dose, 1, 2, 3, 4, 6, 8, 12, 24, 48, 96 and 168 hours post-dose on Day 1, Days 15, 22, 29, 57, 85, 113, 141 and 169
Blood samples were collected at specified timepoints for the assessment of Cmax of triptorelin pamoate. The PK parameters were performed using non-compartmental analysis.
Area Under the Plasma Concentration Time Curve From Time 0 to the Visit on Day 169 (AUC0-169) of Triptorelin Pamoate
Time frame · Pre-dose, 1, 2, 3, 4, 6, 8, 12, 24, 48, 96 and 168 hours post-dose on Day 1, Days 15, 22, 29, 57, 85, 113, 141 and 169
Blood samples were collected at specified timepoints for the assessment of AUC0-169 of triptorelin pamoate. The PK parameters were performed using non-compartmental analysis.
Area Under the Plasma Concentration Time Curve From Time 0 to the Last Quantifiable Concentration (AUClast) of Triptorelin Pamoate
Time frame · Pre-dose, 1, 2, 3, 4, 6, 8, 12, 24, 48, 96 and 168 hours post-dose on Day 1, Days 15, 22, 29, 57, 85, 113, 141 and 169
Blood samples were collected at specified timepoints for the assessment of AUClast of triptorelin pamoate. The PK parameters were performed using non-compartmental analysis.
Time to Maximum Observed Plasma Concentration of Testosterone
Time frame · Pre-dose on Day 1 and Days 2, 3, 5, 8, 15, 22, 29, 57, 85, 113, 141 and 169
Blood samples were collected at specified timepoints for the assessment of tmax of testosterone. The PD parameters were performed using non-compartmental analysis.
Maximum Observed Plasma Concentration of Testosterone
Time frame · Pre-dose on Day 1 and Days 2, 3, 5, 8, 15, 22, 29, 57, 85, 113, 141 and 169
Blood samples were collected at specified timepoints for the assessment of Cmax of testosterone. The PD parameters were performed using non-compartmental analysis.
Time to Castration of Testosterone
Time frame · Pre-dose on Day 1 and Days 2, 3, 5, 8, 15, 22, 29, 57, 85, 113, 141 and 169
Blood samples were collected at specified timepoints for the assessment of tcast of testosterone. tcast was defined as time to reach serum testosterone level \<50 ng/dL or 1.735 nmol/L. The PD parameters were performed using non-compartmental analysis.
Plasma Concentrations of Triptorelin Pamoate
Time frame · Pre-dose on Day 1 and post-dose at Weeks 4, 8, 12, 16, 20 and 24
Blood samples were collected at specified timepoints for the assessment of plasma concentration of triptorelin pamoate.
Eligibility
Inclusion Criteria : * Participant is capable of giving signed informed consent * Participant must be over 18 years of age, at the time of signing the informed consent. * Has a histologically or cytologically confirmed adenocarcinoma, locally advanced or metastatic prostate cancer. Or participant has PSA recurrence after curative treatment and be a candidate for androgen deprivation therapy (ADT). * Has serum testosterone level \>150 ng/dL (\> 5.2 nmol/L). * Has expected survival time ≥12 months according to the investigator's assessment. * Has Eastern Cooperative Oncology Group (ECOG) performance status score ≤1 Exclusion Criteria : * Risk of a serious complication in the case of tumour flare * Presence of another neoplastic lesion or brain metastases. * Previous history of QT prolongation or concomitant use of medicinal products known to prolong the QT interval or with a known risk of torsades de pointes. * Metastatic hormone-sensitive prostate cancer with high tumour burden. * Metastatic castration-resistant prostate cancer. * Previous surgical castration. * Previous hormone therapy (including abiraterone) for prostate cancer within 6 months prior to study start. * Previous cytotoxic chemotherapy treatment within 6 months prior to study screening. * Use of finasteride or dutasteride within 2 months prior to study screening. * Previous hypophysectomy or adrenalectomy * Any current use or use within 6 months prior to treatment start of medications which are known to affect the metabolism and/or secretion of androgenic hormones: ketoconazole, aminoglutethimide, oestrogens and antiandrogens. * Current use of systemic or inhaled corticosteroids (topical application permitted). * Any previous use of traditional Chinese medicine or herbal products within 1 month prior to study screening or planned use during the study of products, which are known to have cytotoxic effect or affect the metabolism and/or secretion of androgenic hormones * Participation in another study with an investigational drug or treatment within 3 months prior to study screening or within 5 drug half-lives of the investigational drug (whichever is the longer). * Severe kidney or liver impairment (creatinine \>2 x upper limit of normal (ULN), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) \>3 x ULN). * Any concomitant disorder or resulting therapy that is likely to interfere with participant compliance, the i.m. administration of the drug or with the study in the opinion of the investigator. * Known hypersensitivity to triptorelin or any of its excipients, GnRH, other GnRH agonist/analogues. * Known active use of recreational drug or alcohol dependence in the opinion of the investigator.
Study locations
China. Showing up to 24 locations stored in the fast local snapshot.
Affiliated Hospital of Hebei University
Baoding, China
Beijing Hospital
Beijing, China
Peking University First Hospital
Beijing, China
Peking University People's Hospital
Beijing, China
Hunan Cancer Hospital
Changsha, China
West China Hospital of Sichuan University
Chengdu, China
Chongqing University Cancer Hospital
Chongqing, China
The First Affiliated Hospital of Chongqing Medical University
Chongqing, China
Deyang People's Hospital
Deyang, China
Sun Yat-Sen University Cancer Center
Guangzhou, China
Guizhou Provincial People's Hospital
Guiyang, China
The Affiliated Hospital of Guizhou Medical University
Guiyang, China
The First Affiliated Hospital, Zhejiang University School of Medicine
Hangzhou, China
Qilu Hospital of Shandong University
Jinan, China
Shandong Provincial Hospital
Jinan, China
Nanjing Drum Tower Hospital
Nanjing, China
Zhongda Hospital Southeast University
Nanjing, China
Ningbo First Hospital
Ningbo, China
Fudan University Shang Hai Cancer Center
Shanghai, China
Shanghai Fifth People's Hospital
Shanghai, China
Shanghai Tongji Hospital
Shanghai, China
Liaoning Cancer Hospital & Institute
Shenyang, China
The First Hospital of China Medical University
Shenyang, China
Peking University Shenzhen Hospital
Shenzhen, China
Publications
No PMID-linked publications were present in this registry snapshot.
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