Microsatellite instability in colorectal carcinoma: Molecular and immunohistochemical correlations

Doctoral Dissertation uoadl:2916528 185 Read counter

Unit:
Faculty of Medicine
Library of the School of Health Sciences
Deposit date:
2020-06-12
Year:
2020
Author:
Katafygiotis Patroklos
Dissertation committee:
Πηνελόπη Κορκολοπούλου, Καθηγήτρια, Ιατρική Σχολή, ΕΚΠΑ, Επιβλέπουσα
Αγγελική Α. Σαέττα , Αναπληρώτρια Καθηγήτρια, Ιατρική Σχολή, ΕΚΠΑ
Ευστράτιος Πατσούρης , Ομότιμος Καθηγητής, Ιατρική Σχολή, ΕΚΠΑ
Νικόλαος Καβαντζάς, Καθηγητής, Ιατρική Σχολή, ΕΚΠΑ
Αφροδίτη Νόννη, Αναπληρώτρια Καθηγήτρια, Ιατρική Σχολή, ΕΚΠΑ
Ειρήνη Θυμαρά, Επίκουρη Καθηγήτρια, Ιατρική Σχολή, ΕΚΠΑ
Στρατηγούλα Σακελλαρίου, Επίκουρη Καθηγήτρια, Ιατρική Σχολή, ΕΚΠΑ
Original Title:
Μοριακή και ανοσοϊστοχημική διερεύνηση της μικροδορυφορικής αστάθειας (MSI) σε καρκινώματα παχέος εντέρου
Languages:
Greek
Translated title:
Microsatellite instability in colorectal carcinoma: Molecular and immunohistochemical correlations
Summary:
Background/Aim:
In the present retrospective study, we assessed the molecular profile and clinicopathological correlations of Greek colorectal carcinoma (CRC) patients.
Patients and Methods:
Data from 157 CRC patients were collected. High Resolution Melting Analysis and Pyrosequencing/Sanger sequencing were applied to identify KRAS, BRAF, NRAS mutations and Microsatellite instability (MSI) status.Immunohistochemistry was used to characterize the associated Mismatch Repair Protein loss. Statistical calculations were performed using the statistical package SPSS v21.0.
Results:
KRAS mutations were detected in 39.3% of cases, BRAF in 10.9% and NRAS in 4.9%. MSI status was recognized in 11.5% of CRC patients and was associated with right colon tumors. MSI phenotype was inversely correlated with stage, N status and KRAS mutations and positively correlated with BRAF mutations.
Conclusion:
MSI positive CRCs in the Greek population are more often right-sided, free of metastasis, KRAS wild type and BRAF mutated. Providing more detailed clinicopathological and molecular data for specific populations enables better clinical management and individualized therapy in the future.
Main subject category:
Health Sciences
Keywords:
Microsatellite instability (MSI), Mismatch repair gene system (MMR), 5-fluorouracil (5-FU)
Index:
No
Number of index pages:
0
Contains images:
Yes
Number of references:
381
Number of pages:
181
Patroklos Τελικό Ελληνικό κείμενο 28-05-20 (1).pdf (3 MB) Open in new window