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Related Experiment Videos

Factor X-activating activity in normal and malignant colorectal tissue.

J L Francis1, K el-Baruni, O S Roath

  • 1University Department of Haematology, Southampton General Hospital, United Kingdom.

Thrombosis Research
|November 1, 1988
PubMed
Summary

Colorectal tumors show higher factor X-activating activity (FXAA) than normal tissue. This activity is primarily due to the interaction between tissue factor and factor VII in both normal and cancerous colorectal tissues.

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Area of Science:

  • Biochemistry
  • Oncology
  • Hematology

Background:

  • Factor X-activating activity (FXAA) is crucial in coagulation.
  • Understanding FXAA in colorectal cancer is important for diagnostics and therapeutics.

Purpose of the Study:

  • To quantify and characterize FXAA in human colorectal tumors and normal mucosa.
  • To elucidate the specific components responsible for FXAA in colorectal tissues.

Main Methods:

  • Assessed FXAA using a chromogenic substrate technique on tissue homogenates.
  • Investigated the effects of inhibitors (DFP, iodoacetamide, mercuric chloride) and specific antibodies (anti-human factor VII).
  • Examined FXAA changes after adsorption with aluminium hydroxide and barium citrate.

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Main Results:

  • FXAA was present in all tested normal and tumor colorectal tissues.
  • Tumor tissues exhibited significantly higher FXAA compared to normal tissues.
  • FXAA was identified as a procoagulant activity inhibited by DFP and linked to factor VII, with adsorption properties consistent with tissue factor.

Conclusions:

  • The FXAA in both normal and malignant colorectal tissues is attributed to the interaction between tissue factor and factor VII.
  • This finding suggests a potential role for the tissue factor-factor VII pathway in colorectal cancer progression.