RGD Reference Report - Reduced expression of mutS homolog 2 and mutL homolog 1 affects overall survival in laryngeal squamous cell carcinoma patients: Investigation into a potential cause. - Rat Genome Database

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Reduced expression of mutS homolog 2 and mutL homolog 1 affects overall survival in laryngeal squamous cell carcinoma patients: Investigation into a potential cause.

Authors: Gong, Hong-Li  Shi, Yong  Shi, Yi  Wu, Chun-Ping  Cao, Peng-Yu  Zhou, Liang  Xu, Chen 
Citation: Gong HL, etal., Oncol Rep. 2013 Sep;30(3):1371-9. doi: 10.3892/or.2013.2559. Epub 2013 Jun 20.
RGD ID: 126848783
Pubmed: (View Article at PubMed) PMID:23787767
DOI: Full-text: DOI:10.3892/or.2013.2559

The risk factors affecting the survival rates of laryngeal carcinoma are not well understood. In this study, we investigated the expression status of mutS homolog 2 (MSH2) and mutL homolog 1 (MLH1) and examined the relationship between these two molecules and overall survival rates in laryngeal cancer. We also explored the potential reason for the altered expression of these two genes. Using real-time polymerase chain reaction and western blotting, we detected MSH2 and MLH1 expression in laryngeal cancer tissue samples. We collected a retrospective cohort with 180 laryngeal cancer patients, and inspected MSH2 and MLH1 staining with tissue microarray immunohistochemistry. Prognostic value of clinicopathological characteristics was evaluated by statistical analysis. Laryngeal carcinoma cells were co-cultured with Helicobacter pylori (H. pylori) bacteria. MSH2 and MLH1 were expressed at lower levels compared to those of adjacent tissues in 21 laryngeal carcinoma patients. Patients with negative expression of MSH2 and MLH1 tended to have a higher risk of mortality compared to patients with positive expression (HR=4.38; HR=3.0, respectively). Cigarette smoking rate was higher in the MLH1 expression positive group. H. pylori infection reduced the MSH2 and MLH1 expression levels of laryngeal carcinoma cell lines within co-culture conditions. It is suggested that the altered expression levels of MSH2 and MLH1 probably affect the overall survival of laryngeal carcinoma patients. H. pylori infection may have an effect on the expression of MSH2 and MLH1 in laryngeal carcinoma patients.

Annotation

Disease Annotations    

Objects Annotated

Genes (Rattus norvegicus)
Mlh1  (mutL homolog 1)
Msh2  (mutS homolog 2)

Genes (Mus musculus)
Mlh1  (mutL homolog 1)
Msh2  (mutS homolog 2)

Genes (Homo sapiens)
MLH1  (mutL homolog 1)
MSH2  (mutS homolog 2)


Additional Information