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Increased production of growth factors and epidermal growth factor receptor by gastric carcinoma
I M Paterson1, C A Bennett, C M Corbishley
1Department of Surgery, St. George's Hospital, London, UK.
Abstract:
Four growth factors and one growth factor receptor have been studied in carcinomas from 22 gastrectomy specimens and compared to non-malignant tissue from the same specimen. cDNA probes for transforming growth factors alpha and beta, platelet-derived growth factor A and B, insulin-like growth factor II and epidermal growth factor receptor were used to assay messenger RNA transcripts for the growth factors by dot hybridization. Increased levels of all the transcripts were found in carcinomas compared to benign tissue (P less than 0.05). No correlation was found between any of the growth factors studied and tumour stage or patient survival. Increased growth factor production by gastric cancers may be important in the pathogenesis of these tumours and further work is required to establish their role.
Insights
Gastric cancers show increased levels of key growth factors and receptors compared to normal tissue. However, these elevated growth factors did not correlate with tumor stage or patient survival in this study.
Area of Science:
- Oncology
- Molecular Biology
- Gastroenterology
Background:
- Gastric cancer pathogenesis involves complex molecular mechanisms.
- Growth factors play a critical role in cell proliferation and tumor development.
Purpose of the Study:
- To investigate the expression levels of specific growth factors and their receptors in gastric carcinomas.
- To compare growth factor expression in cancerous versus non-malignant gastric tissue.
Main Methods:
- Utilized cDNA probes for transforming growth factors alpha and beta, platelet-derived growth factors A and B, insulin-like growth factor II, and epidermal growth factor receptor.
- Assayed messenger RNA transcripts using dot hybridization in 22 gastrectomy specimens.
Main Results:
- Significantly increased messenger RNA transcripts for all studied growth factors were observed in carcinomas compared to benign tissue (P < 0.05).
- No correlation was found between the expression of these growth factors and tumor stage or patient survival.
Conclusions:
- Elevated production of growth factors by gastric cancers may contribute to tumor pathogenesis.
- Further research is needed to elucidate the precise role of these growth factors in gastric cancer.