MLH1 and MSH2 mismatch repair protein profile using immunohistochemistry in Nepalese colorectal cancer patients

  • Matrika Bhattarai Central Department of Biotechnology, Tribhuvan University, Kathmandu, Nepal
  • Wan Khairunnisa Wan Juhari Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia; Malaysian Node of the Human Variome Project, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia https://orcid.org/0000-0002-7111-7252
  • Raju Lama Central Department of Biotechnology, Tribhuvan University, Kathmandu, Nepal
  • Chin Bahadur Pun B.P. Koirala Memorial Cancer Hospital, Bharatpur, Chitwan, Nepal
  • Wardah Yusof Malaysian Node of the Human Variome Project, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia https://orcid.org/0000-0003-2574-6119
  • Wan Faiziah Wan Abdul Rahman Department of Pathology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia
  • Andee Dzulkarnaen Zakaria Department of Surgery, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia
  • Khairul Bariah Ahmad Amin Noordin School of Dental Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia
  • Tilak R. Shrestha Central Department of Biotechnology, Tribhuvan University, Kathmandu, Nepal https://orcid.org/0000-0003-1381-3783
  • Bin Alwi Zilfalil Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia; Malaysian Node of the Human Variome Project, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kelantan, Malaysia
DOI: https://doi.org/10.13181/mji.oa.203633
Keywords: colorectal cancer, immunohistochemistry, mismatch repair, MutL homolog 1, MutS homolog 2
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Abstract

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.

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Published
2020-07-01
How to Cite
1.
Bhattarai M, Wan Juhari WK, Lama R, Pun CB, Yusof W, Wan Abdul Rahman WF, Zakaria AD, Ahmad Amin Noordin KB, R. Shrestha T, Zilfalil BA. MLH1 and MSH2 mismatch repair protein profile using immunohistochemistry in Nepalese colorectal cancer patients. Med J Indones [Internet]. 2020Jul.1 [cited 2024Apr.26];29(2):183-9. Available from: http://mji.ui.ac.id/journal/index.php/mji/article/view/3633
Issue
Vol. 29 No. 2 (2020): June
Section
Clinical Research

Copyright (c) 2020 Matrika Bhattarai, Raju Lama, Wan Khairunnisa Wan Juhari, Wardah Yusof, Wan Faiziah Wan Abdul Rahman, Andee Dzulkarnaen Zakaria, Khairul Bariah Ahmad Amin Noordin, Tilak R. Shrestha, Bin Alwi Zilfalil

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