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Updated: May 26, 2026

Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer

Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer

Published on: July 28, 2010

Gene expression analysis in chronic postradiation proctopathy.

F Traub¹, S Schleicher, A Kirschniak

¹Department of General, Visceral and Transplant Surgery, University Tübingen, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany. Frank-Traub@gmx.net

International Journal of Colorectal Disease

|December 17, 2011

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Radiation therapy can cause chronic radiation proctopathy, damaging rectal tissue. This study reveals complex gene expression changes, including hypoxia-inducible factor 1 (HIF-1) and vascular endothelial growth factor (VEGF) overexpression, contributing to rectal injury.

Area of Science:

Oncology
Gastroenterology
Molecular Biology

Background:

Radiotherapy for pelvic tumors can lead to chronic radiation proctopathy in 5-20% of patients.
Endothelial dysfunction is implicated in various pathophysiological processes, affecting angiogenesis, inflammation, and vascular permeability.

Purpose of the Study:

To investigate the molecular mechanisms underlying radiation-induced rectal injury.
To analyze gene expression related to oxidative stress, hypoxia, angiogenesis, and inflammation in chronic radiation proctopathy.

Main Methods:

Rectum tissue samples from 20 patients with chronic radiation proctopathy were analyzed.
Gene expression of endoglin (ENG), activin receptor-like kinase 1 (ALK1), PECAM, VEGF, FGF2, HIF-1, and IL-1β was assessed.

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Last Updated: May 26, 2026

Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer

Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer

Published on: July 28, 2010

Main Results:

Overexpression of hypoxia-inducible factor 1 (HIF-1), vascular endothelial growth factor (VEGF), fibroblast growth factor 2 (FGF2), and interleukin-1 beta (IL-1β) was observed.
A significant downregulation of activin receptor-like kinase 1 and endoglin (ENG) was identified for the first time.

Conclusions:

Radiation-induced rectal injury involves complex signaling pathways, not a single event.
Postradiation tissue hypoxia is critical for fibrosis, influencing profibrotic and angiogenic factors in rectal tissue.