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Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
Published on: September 18, 2020
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Mutation profiling in gallbladder cancer in Indian population.
Niraj Kumari1, Christopher L Corless, Andrea Warrick
1Departments of Pathology and Surgical Gastroenterology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India, .
Indian Journal of Pathology & Microbiology
|April 18, 2014
Summary
Gallbladder cancer genetics reveal mutations in TP53, CTNNB1, PIK3CA, and KRAS. Identifying these molecular markers aids in early diagnosis and targeted therapy development for this aggressive cancer.
Area of Science:
- Oncology
- Molecular Genetics
- Cancer Research
Background:
- Gallbladder cancer is an aggressive malignancy often diagnosed at late stages.
- The molecular genetics of gallbladder cancer are heterogeneous and not well-established.
- Identifying genetic alterations is crucial for understanding tumor pathogenesis.
Purpose of the Study:
- To perform mutation profiling of gallbladder cancer using massarray technology.
- To identify molecular markers involved in gallbladder cancer pathogenesis.
- To find potential markers for early diagnosis and therapeutic targets.
Main Methods:
- Screened 49 gallbladder cancer cases using Sequenom Massarray technology.
- Analyzed 390 mutations across 30 genes in formalin-fixed, paraffin-embedded tissues.
- Correlated mutation profiling results with tumor characteristics.
Main Results:
- Mutations were identified in 9 out of 49 cases across four genes: TP53 (4 cases), CTNNB1 (2 cases), PIK3CA (2 cases), and KRAS (1 case).
- Six mutated cases were well-differentiated, and eight were stage II-IV disease.
- Six cases with mutations had associated gallstones.
Conclusions:
- The observed mutation frequency aligns with existing literature data for gallbladder cancer.
- Identification of PIK3CA and KRAS mutations can inform targeted therapeutic strategies.
- Larger studies are needed to explore additional targets and refine genetic classification.
