MLH1 and MSH2 mismatch repair protein profile using immunohistochemistry in Nepalese colorectal cancer patients
| Autor: | Chin Bahadur Pun, Wan Khairunnisa Wan Juhari, Bin Alwi Zilfalil, Khairul Bariah Ahmad Amin Noordin, Wan Faiziah Wan Abdul Rahman, Andee Dzulkarnaen Zakaria, Wardah Yusof, Tilak R. Shrestha, Matrika Bhattarai, Raju Lama |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Oncology
medicine.medical_specialty congenital hereditary and neonatal diseases and abnormalities Colorectal cancer colorectal cancer MLH1 03 medical and health sciences 0302 clinical medicine Germline mutation Internal medicine medicine MutL homolog 1 neoplasms MutS homolog 2 030304 developmental biology 0303 health sciences lcsh:R5-920 business.industry nutritional and metabolic diseases General Medicine Mismatch Repair Protein medicine.disease Lynch syndrome digestive system diseases mismatch repair MSH2 030220 oncology & carcinogenesis immunohistochemistry Immunohistochemistry DNA mismatch repair business lcsh:Medicine (General) |
| Zdroj: | Medical Journal of Indonesia, Vol 29, Iss 2 (2020) |
| ISSN: | 2252-8083 0853-1773 |
| Popis: | BACKGROUND Hereditary nonpolyposis colorectal cancer, or Lynch syndrome, caused by germline mutations or genetic defects in mismatch repair (MMR) genes (MLH1, MSH2, PMS2, MSH6, and epithelial cellular adhesion molecule), is an autosomal dominant condition accounting for 2–5% of all colorectal carcinomas (CRCs). Reports on MMR loss in many populations are available; however, there are no reports on the frequency of MMR protein expression in Nepalese cohorts. Therefore, this study was aimed to assess the expression profiles of MLH1 and MSH2 protein by immunohistochemistry (IHC) in Nepalese CRC patients. METHODS This retrospective study used archived formalin-fixed paraffin-embedded tissue blocks from 43 Nepalese CRC patients. IHC staining was performed using MLH1 and MSH2 antibodies. IHC scoring analysis was assessed using semiquantitative scoring. RESULTS Of the 43 CRC patients, 8 (18.6%) showed loss of staining for MLH1 antibody, 5 (11.6%) showed loss of staining for MSH2 antibody, and 4 (9.3%) showed loss of staining for both MLH1 and MSH2 antibodies. CONCLUSIONS IHC is a potential screening method of determining the MMR expression profile of Nepalese CRC patients. IHC can be performed in local clinical laboratories to find MMR protein defects in selected cases prior to expensive molecular tests. |
| Databáze: | OpenAIRE |
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