Clinical Trial: Contamination of Testicle Tissue by RT-PCR in Participants With Solid Tumors
Study Status: Not yet recruiting
Recruit Status: Unknown status
Study Type: Observational
Official Title: Study About Contamination of Testicle Tissue by RT-PCR in Children With Solid Tumors
Brief Summary: For prepubertal patients, cryopreservation of testicular tissue is the only option available to preserve their fertility before cancer treatment. But testicular autograft raises the issue of the risk of reintroduction of potentially malignant cells. The aim of our study is to develop a specific and sensitive method for residual disease detection in the testicular tissue from patients treated for a solid tumor during infancy, whose fertility may have been compromised by treatments and who benefited of testicular tissue cryopreservation.
Detailed Summary:
Some solid tumors have high risk of metastatic localization including in testis. There is concern over the possible presence of malignant cells in testicular tissue that could cause a recurrence of the primary disease after reimplantation. Thus, the possibility of testicular tissue involvement needs to be evaluated with sensitive molecular methods.
Based on our experience in detection by RT-PCR of minimal residual disease (MRD) in neuroblastoma since 1994 [Tchirkov et al. 2003] and in testicular tissue cryopreservation since 2012, we want to develop a specific and sensitive method for residual disease detection by RT-PCR in order to evaluate the tumor contamination of testicular harvested tissue.
Study population: We chose 3 models of pediatric solid tumors with high risk of metastases and which often require sterilizing treatments (chemo and/or radiotherapy): neuroblastoma, Ewing tumor and alveolar rhabdosarcoma. We will use four tumor cells lines: IMR32 and SK-NSH for neuroblastoma; RD-ES for Ewing tumor; RH-30 for rhabdosarcoma. We plan to use 20 fragments per line.
Study duration: 12 months Study design: Testicular tissue without known malignancy but with a condition warranting a biopsy (fertility assessment) will be harvested.
The harvested testicular cortex will be treated to recover all viable sperm and then, we use remaining tissue to be contaminated with tumor cells lines. Then, detection of the specific transcript will be done by RT-PCR in fresh tissue and after freeze/thaw. Total RNA will be extracted with the TRI-reagent and qRT-PCR will be performed using the "TaqMan" technology.
Primary endpoint: to reach a sensitivity about 1/106 cells.
Sponsor: University Hospital, Clermont-Ferrand
Current Primary Outcome: malignant cells about 1/10 *6 cells. [ Time Frame: at day 1 ]
Original Primary Outcome: Same as current
Current Secondary Outcome:
Original Secondary Outcome:
Information By: University Hospital, Clermont-Ferrand
Dates:
Date Received: March 24, 2015
Date Started: November 2014
Date Completion: June 2016
Last Updated: March 26, 2015
Last Verified: March 2015
