Related Experiment Videos
Multidrug resistance 1 gene expression in Indian patients with gastric carcinoma
S Ramesh1, P Shanthi, K Baba Krishnan
1Department of Pathology, Dr A L Mudaliar Postgraduate Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai 600 113.
Background:
Gastric carcinoma is frequently refractory to chemotherapy. The multidrug resistance 1 gene (MDR1) encodes for a protein (p-glycoprotein) that functions as a drug efflux pump and thus contributes to resistance to chemotherapeutic agents.
Methods:
We studied gastric tissues from 28 patients with gastric cancer for MDR1 expression, using immunohistochemistry.
Results:
Sixteen (57%) of 28 cases showed MDR1 expression. Sections of normal mucosa away from the tumor showed perinuclear staining for MDR1 in surface epithelial cells, whereas tumor cells showed diffuse cytoplasmic positivity.
Conclusions:
Over one half of gastric carcinoma specimens at our center show MDR1 gene expression.
Insights
Over half of gastric cancer patients exhibit multidrug resistance 1 (MDR1) gene expression, a key factor in chemotherapy resistance. This finding highlights MDR1
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Gastric carcinoma often shows resistance to chemotherapy.
- The multidrug resistance 1 (MDR1) gene encodes p-glycoprotein, a drug efflux pump.
- P-glycoprotein contributes to chemotherapeutic agent resistance.
Purpose of the Study:
- To investigate the expression of the multidrug resistance 1 (MDR1) gene in gastric carcinoma.
- To determine the prevalence of MDR1 expression in gastric cancer tissues.
Main Methods:
- Gastric tissues from 28 gastric cancer patients were analyzed.
- Immunohistochemistry was employed to detect MDR1 expression.
Main Results:
- MDR1 expression was observed in 16 out of 28 (57%) gastric cancer cases.
- Normal gastric mucosa showed perinuclear MDR1 staining in surface epithelial cells.
- Gastric tumor cells exhibited diffuse cytoplasmic positivity for MDR1.
Conclusions:
- More than half of the studied gastric carcinoma specimens demonstrated MDR1 gene expression.
- MDR1 expression is a notable feature in a significant proportion of gastric cancers.