Nephroureterectomy, Tumor, Upper Urinary Tract Urothelial Carcinoma, Xenograft Model
Conditions
Brief summary
Upper Urinary Tract Urothelial Carcinomas are rare, aggressive tumors, accounting for 5 to 10% of all urothelial tumors. These include tumors which develop in the renal cavities (renal pelvis, calices) and ureteral tumors. Nephro-ureterectomy is the standard treatment but 80% of patients will have a relapse within 2 years. Only one trial has (Birtle et al. 2020), has shown the interest of postoperative chemotherapy. Neoadjuvant systemic treatment seems particularly interesting for a population which is going to undergo a nephronic loss and therefore reduction in kidney function which is likely to make patients ineligible for cisplatin. In favor of additional immunotherapy, it has been described that upper excretory tract tumors have a high immunogenic potential with a high rate of microsatellite instability. From surgical samples of patient tumors obtained after nephroureterectomy or biopsy material collected before treatment, we are going to generate patient-derived cell lines and xenograft models in the mouse. A recent publication has demonstrated the feasibility of this approach by specifying that the capture rate of tumor cells is 50% for patient-derived xenografts and 25% for patient-derived cells (Coleman et al. 2020). As tumors harvested from biopsies do not grow in patient-derived xenografts,we plan to graft the biopsies onto chorioallantoic chicken embryo membranes, a model which has never been used for this indication and which is one of the original features of our approach. These three concomitant approaches will allow us to increase our chances of obtaining stable upper urinary tract urothelial carcinoma lines to be used for the screening and identification of new treatments or new combinations of molecules that would benefit patients with upper urinary tract urothelial carcinomas, knowing that very few studies dedicated to this type of cancer have been conducted or published due to the rarity of the disease and the lack of existing models published on the subject of these particular tumors. .
Interventions
None listed
Sponsors
Centre Hospitalier Universitaire de Nīmes
INSERM U1194, Institut de Recherche en Cancérologie de Montpellier, Campus Val d'Aurelle, 34298 Montpellier cedex 5
Study design
Observational model
OTHER
Time perspective
OTHER
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Inclusion criteria
* Patients treated consecutively at the Urology Andrology Department of Nîmes University Hospital for high grade carcinoma of the pelvis or renal ureter with an indication for total nephroureterectomy decided during a multidisciplinary meeting. * Patient with a diagnosis of high-grade urothelial carcinoma of the pelvis or renal ureter confirmed by histology (biopsy, biopsy of the ureteroscopic) or by cytology with the presence of : * High-grade disease on ureteroscopic biopsy OR ; * High grade disease on urinary cytology AND infiltrating appearance of the renal pelvic wall / ureter on the scanner (the presence of hydronephrosis will be considered as pervasive by definition) with a negative cytoscopy.
Exclusion criteria
* Any patient who has undergone previous systemic treatment.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Histological characteristics of patient-derived xenograft models after staining. | 1-6 months after harvesting | Microscopic observation of cells after staining with hematoxylin and eosin |
| Study of genomes of tumor specimens | 1-6 months after harvesting | Exome sequencing of DNA cells isolated from original patient tumor specimens. |
| Alterations in the genomes of patient-derived xenograft tumor models | 1-6 months after harvesting | Exome sequencing of DNA cells isolated from patient-derived xenograft tumor models. |
| Alterations in the genomes of patient-derived cell line models | 1-6 months after harvesting | Exome sequencing of DNA cells isolated from patient-derived cell line models. |
| Study of the transcriptome of patient tumor specimens. | 1-6 months after harvesting | RNA-sequencing of cells isolated from patient tumor specimens. |
| Transcriptome of the patient-derived xenograft tumor models. | 1-6 months after harvesting | RNA-sequencing of cells isolated from patient-derived xenograft tumor models. |
| Transcriptome of the patient-derived cell line models. | 1-6 months after harvesting | RNA-sequencing of cells isolated from patient-derived cell line models. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Sensitivity to Cisplatin: patient-derived cell line models | 6-8 months after harvesting | The MIC 50 test (Minimum Inhibitory Concentration required for cell growth to be inhibited by 50%) will be used in vitro to test the tumor cells' response to Cisplatin. |
| Sensitivity to Carboplatin: patient-derived cell line models | 6-8 months after harvesting | The MIC 50 test (Minimum Inhibitory Concentration required for cell growth to be inhibited by 50%) will be used in vitro to test the tumor cells' response to Carboplatin. |
| Sensitivity to Oxaliplatin: patient-derived cell line models | 6-8 months after harvesting | The MIC 50 test (Minimum Inhibitory Concentration required for cell growth to be inhibited by 50%) will be used in vitro to test the tumor cells' response to Oxaliplatin. |
| Sensitivity to Gemcitabin: patient-derived cell line models | 6-8 months after harvesting | The MIC 50 test (Minimum Inhibitory Concentration required for cell growth to be inhibited by 50%) will be used in vitro to test the tumor cells' response to Gemcitabin. |
| Tumor size in non-treated patient-derived xenograft models | 1-6 months after harvesting | The volume of tumors will be measured in mm3. |
| Sensitivity to Cisplatin: tumor size in treated patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Cisplatin in xenograft models, the volume of tumors will be measured in mm3 and compared with the volume of tumors in the non-treated control group. |
| Sensitivity to Cisplatin: tumor growth rate in patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Cisplatin in xenograft models, the Tumor Growth Inhibition index, which is defined as (1 - (mean volume of treated tumors)/(mean volume of control tumors)) × 100% will be used. |
| Sensitivity to Carboplatin: tumor size in treated patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Carboplatin in xenograft models, the volume of tumors will be measured in mm3 and compared with the volume of tumors in the non-treated control group. |
| Sensitivity to Carboplatin: tumor growth rate in treated patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Carboplatin in xenograft models, the Tumor Growth Inhibition index, which is defined as (1 - (mean volume of treated tumors)/(mean volume of control tumors)) × 100% will be used. |
| Sensitivity to Oxiplatin: tumor size in treated patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Oxiplatin in xenograft models, the volume of tumors will be measured in mm and compared with the volume of tumors in the non-treated control group. |
| Sensitivity to Oxiplatin: tumor growth rate in treated patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Oxiplatin in xenograft models, the Tumor Growth Inhibition index, which is defined as (1 - (mean volume of treated tumors)/(mean volume of control tumors)) × 100% will be used. |
| Sensitivity to Gemcitabine: tumor size in treated patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Gemcitabine in xenograft models, the tumor volume will be measured in mm3 and compared with the volume of tumors in the non-treated control group. |
| Sensitivity to Gemcitabin: tumor growth rate in treated patient-derived xenograft models | 6-8 months after harvesting | To test the tumor cells' response to Gemcitabin in xenograft models, the Tumor Growth Inhibition index, which is defined as (1 - (mean volume of treated tumors)/(mean volume of control tumors)) × 100% will be used. |
Countries
France
Contacts
PRINCIPAL_INVESTIGATORNadine HOUEDE, Pr.
CHU de Nimes
Outcome results
None listed