Testicular Tissue Cryopreservation (TTC)

Not Applicable

Recruiting

• Conditions: Fertility Issues
• Interventions: Procedure: Testicular tissue biopsy and cryopreservation

• Registration Number: NCT06387498
• Lead Sponsor: University of Colorado, Denver

Brief Summary

The "Testicular Tissue Cryopreservation" study is open to a subset of patients facing disease or treatment regimens that could lead to infertility (gonadotoxic therapies). For some of these patients, experimental testicular tissue cryopreservation is the only fertility preservation option available. The overall objective of this study is to determine the feasibility and acceptability of testicular tissue cryopreservation in male patients of all ages who have a condition or will undergo a treatment that can cause infertility.

Detailed Description

For male patients who currently have no options for fertility preservation, this research proposal will enable optimization of testicular tissue procurement and processing, cryopreservation, and diagnosis/elimination of malignant cell contamination to ensure safety for future fertility-restoring treatments. While results from animal models and human organ donor experiments support the efficacy of testicular tissue/cell cryopreservation for fertility preservation and subsequent restoration, rigorous safety and efficacy data in human patients who will undergo infertility-causing therapies is lacking. However, the patients being recruited for this study currently have no options for future therapies aimed at fertility preservation without the preservation of their testicular tissue/cells prior to treatment. Thus, the current study will provide a potential resource for future fertility restoration.

Study Timeline

• Study Start: 2020-09-28
• Study First Submitted: 2022-05-13
• Study First Submitted QC: 2024-04-25
• Study First Posted: 2024-04-29
• Status Verified: 2024-05
• Last Update Submitted: 2024-05-24
• Last Update Posted: 2024-05-29
• Primary Completion: 2027-12-30
• Study Completion: 2027-12-30

Recruitment & Eligibility

• Status: RECRUITING
• Sex: Male
• Target Recruitment: 60

Inclusion Criteria

1. Male at any age.

2. Scheduled to undergo surgery, chemotherapy, drug treatment and/or radiation for the treatment or prevention of a medical condition or malignancy with risk of causing permanent and complete loss of subsequent testicular function. Be in significant risk of infertility as defined by:

   • Cyclophosphamide equivalent dose (CED) ≥4 g/m2
   • Total body irradiation (TBI)
   • Testicular radiation >2.5 Gy
   • Cisplatin 500 mg/m2
   • Bone Marrow Transplant (BMT)

3. Or have a medical condition or malignancy that requires removal of all or part of one or both testicles.

4. Or have newly diagnosed or recurrent disease. Those who were not enrolled at the time of initial diagnosis (i.e., patients with recurrent disease) are eligible if they have not previously received therapy that is viewed as likely to result in complete and permanent loss of testicular function.

5. Have two testicles if undergoing elective removal of a testicle for fertility preservation only. Note: removal of both testicles will limit fertility preservation options.

6. Sign an approved informed consent and authorization permitting the release of personal health information. The patient and/or the patient's legally authorized guardian must acknowledge in writing that consent for specimen collection has been obtained, in accordance with institutional policies approved by the U.S. Department of Health and Human Services.

7. Consent for serum tests for infectious diseases [including Hepatitis B Surface Antigen, Hepatitis C Virus (HCV) Antibody, and Human Immunodeficiency Virus (HIV) antigen/antibody screen to be performed at the time of testicular tissue harvesting.

8. Undergo a full history and physical examination and obtain standard pre-operative clearance (based on the most recent American College of Cardiology/American Heart Association (ACC/AHA) Guideline for Perioperative Cardiovascular Evaluation for Noncardiac Surgery) as determined by their primary surgeon.

Exclusion Criteria

Patients will be ineligible for participation in this study if they are:

1. Diagnosed with psychological, psychiatric, or other conditions which prevent giving fully informed consent.
2. Diagnosed with an underlying medical condition that significantly increases their risk of complications from anesthesia and surgery.

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Exclusion Criteria

Not provided

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Testicular Tissue Cryopreservation	Testicular tissue biopsy and cryopreservation	Enrolled participants will undergo a testicular tissue biopsy. The method and amount of tissue procurement will be at the discretion of the surgeon.

Primary Outcome Measures

Name	Time	Method
Feasibility, as Assessed via the Percentage of Eligible Patients who do a Procedure	Up 3 months after prescribed gonadotoxic therapy	Determine feasibility of testicular tissue cryopreservation (TTC) in male patients receiving gonadotoxic therapies who desire fertility preservation. Calculated by the percentage of eligible patients that elect to proceed with TTC.
Feasibility, as Assessed via Percentage of Patients who Attempted a Procedure who were able to Cryopreserve	Up to 48 hours after testicular tissue biopsy	Determine feasibility of testicular tissue cryopreservation (TTC) in male patients receiving gonadotoxic therapies who desire fertility preservation. Calculated by the number of study participants whose tissue was successfully cryopreserved.
Safety, as Assessed via the Number of Participants with At Least One Pre-specified	Assessed at 6 months	The investigators will determine the safety of testicular tissue cryopreservation (TTC) in male patients receiving gonadotoxic therapies who desire fertility preservation. The number of participants with long-term pain.
Safety, as Assessed via the Number of Participants with At Least One Pre-specified Adverse Event	24 hours of the procedure	The investigators will determine the safety of testicular tissue cryopreservation (TTC) in male patients receiving gonadotoxic therapies who desire fertility preservation. The number of participants with bleeding.

Secondary Outcome Measures

Name	Time	Method
Acceptability, as Assessed via Annual Survey Regret Score	Annually until the age of majority for the male participant	The Decision Regret Scale measures distress or remorse after a health care decision. Possible scores range from 0-100, with higher scores indicating high regret.

Trial Locations

Locations (1)

University of Colorado; 🇺🇸 Aurora, Colorado, United States