- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03961737
Study of the Response to Irradiation on Prostatic Explants ex Vivo, as a Predictive Factor of the Clinical Response to Irradiation of Prostate Cancers (EXPLANT)
Of the 50,000 prostate cancers that occur each year in France, more than half will benefit from curative radiotherapy, alone or in combination with hormone therapy from 6 months to 3 years depending on the stage of the disease. At present, there are few ways to predict the response to this irradiation.
Evaluating the early response of tumor tissue to irradiation could predict the final response to treatment. It is difficult to offer biopsies during treatment for reasons of patient comfort. This is why this study consists in analysing transcriptomic and protein responses (immunohistochemistry) to irradiation on ex vivo prostate explants. These explants will be irradiated after culture and the transcriptional and immunohistochemical changes analysed before and after irradiation to determine an early tumor tissue response profile to irradiation.
Study Overview
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: STEPHANE SUPIOT, MD
- Phone Number: +33240679900
- Email: stephane.supiot@ico.unicancer.fr
Study Contact Backup
- Name: Emilie DEBEAUPUIS
- Email: emilie.debeaupuis@ico.unicancer.fr
Study Locations
-
-
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Saint-Herblain, France, 44805
- Recruiting
- ICO
-
Contact:
- STEPHANE SUPIOT, MD
- Phone Number: +33240679900
- Email: stephane.supiot@ico.unicancer.fr
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- ≥ 18 years old
- Patient with non-operated prostate adenocarcinoma for whom radiotherapy treatment is scheduled
- Signed Informed Consent
No contraindications to biopsy performance:
- No anticoagulant treatment in progress
- Absence of infection during diagnostic biopsies
- Absence of pain requiring level 2 analgesics during diagnostic biopsies
- Absence of bleeding complications during diagnostic biopsies
- Absence of anal stenosis
Normal coagulation examination :
- Prothrombin Ratio between 80 and 100%.
- Active Cephalin Time from 24 to 41 seconds, > 1.5 times that of the indicator
- Platelets > 150,000 G/L
- International Normalised Ratio(INR) = 1 after stopping the anticoagulant
No contraindication to MRI:
- Ocular metallic foreign body
- Pacemaker
- Old mechanical heart valve
- Ancient vascular clips on cranial aneurysms
Exclusion Criteria:
- History of radical prostatectomy. A history of transurethral prostate resection is not a contraindication
- History of prostate infection
- Hemorrhagic complications in diagnostic biopsies
- Pain requiring level 2 analgesics in diagnostic biopsies
- Anticoagulant treatment in progress (aspirin will be stopped 1 week before biopsies are performed)
- Abnormal coagulation assessment
- Anal stenosis
- Contraindications to radiotherapy: chronic inflammatory bowel disease, scleroderma
- Protected or tutored patient
- Patient whose follow-up at two years is not possible
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: prostatic explants
A first series of biopsies will be performed during the procedure to place the gold grains prior to radiotherapy.
Explants will be performed from these biopsies.
Half of these explants will be irradiated with a research irradiator at a dose of 2 Gy then placed for 24 hours in an appropriate culture medium.
The other half will be directly cultured for 24 hours.
After 24 hours of incubation, half of the irradiated explants and half of the explants will be used to study the transcriptome.
The tissues will be stored in RNAlater solution and then frozen at -80°C.
The remaining half explants will be used for immunohistochemical analysis.
Two years after the end of radiotherapy, a new series of biopsies will be performed for research, in order to verify histologically the effectiveness of radiotherapy.
|
Before radiotherapy treatment, prostate biopsies will be performed in each patient. From these biopsies, explants will be performed. Half of these explants will be irradiated ex vivo and the other half will not receive any prior treatment. Then the patient will receive radiotherapy. It will be reviewed 2 years after the end of radiotherapy. New prostate biopsies will be performed to evaluate the tumor response to radiotherapy and to characterize the immunohistochemical and transcriptomic profiles of non-responder patients. |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
biopsy tumor response
Time Frame: 24 months after radiotherapy
|
The centralized anatomopathological study of prostate biopsies will classify patients into good responders (absence of viable tumour cells) and poor responders (persistence of viable tumour cells).
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24 months after radiotherapy
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Biochemical response to radiotherapy.
Time Frame: every 6 months for a maximum total of 24 months
|
Biological response to radiotherapy the biological response to radiotherapy is assessed by measuring serum PSA levels according to Phoenix criteria, nadir 2 ng/ml
|
every 6 months for a maximum total of 24 months
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prostatic Magnetic Resonance Imaging
Time Frame: 24 months after radiotherapy
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Prostate MRI 2 years after the end of radiotherapy, used to identify the area affected by the tumor
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24 months after radiotherapy
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Stéphane SUPIOT, MD, ICO
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- ICO-N-2016-05
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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