Effects of Radiotherapy on Collagenase Activity in Rectal Cancer
Author Information
Author(s): Kumar A, Collins H M, Scholefield J H, Watson S A
Primary Institution: Academic Unit of Cancer Studies, Division of GI Surgery, University Hospital, Nottingham, NG7 2UH, UK
Hypothesis
The study investigates the effect of preoperative high-dose radiotherapy on the type-IV collagenase protein profile in patients with resectable rectal cancer.
Conclusion
Preoperative high-dose radiotherapy increases the activity of type-IV collagenases in patients with resectable rectal cancer.
Supporting Evidence
- A significant increase in active MMP-2 was observed in malignant rectal mucosa after radiotherapy.
- Pro MMP-2 levels also increased after radiotherapy.
- The precursor form of MMP-9 showed a two- to threefold increase after treatment.
Takeaway
When patients with rectal cancer receive high-dose radiation before surgery, their bodies produce more enzymes that break down collagen, which might help in treatment.
Methodology
Biopsy samples from patients were analyzed using gelatin zymography to study collagenase expression before and after radiotherapy.
Participant Demographics
Patients with resectable rectal cancer.
Statistical Information
P-Value
P< 0.01, P = 0.047, P = 0.03
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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