Plasminogen Activators as Indicators of Gastrointestinal Cancer
Author Information
Author(s): P.A.F. de Bruin, H.W. Verspaget, G. Griffioen, J.H. Verheijen, G. Dooijewaard, C.B.H.W. Lamers
Primary Institution: University Hospital, Leiden, The Netherlands
Hypothesis
Can plasminogen activator measurements in endoscopic biopsies effectively indicate gastrointestinal malignancy?
Conclusion
PA antigen measurements in endoscopic biopsies can reliably detect gastrointestinal malignancy.
Supporting Evidence
- 90% of tumor biopsies had a higher PA antigen ratio than normal tissue biopsies.
- u-PA levels were significantly higher in tumor tissues compared to normal tissues.
- t-PA levels were significantly lower in tumor tissues compared to normal tissues.
- The u-PA/t-PA antigen ratio effectively discriminated between normal and malignant tissues.
- Results showed a high concordance between biopsy and resection specimen antigen ratios.
Takeaway
Doctors can use special tests on small tissue samples from the stomach and intestines to tell if someone has cancer.
Methodology
The study compared plasminogen activator levels in endoscopic biopsies and resection specimens from patients with colorectal and gastric cancers.
Potential Biases
Potential for false negatives in biopsy results due to sampling error.
Limitations
Sampling errors may occur due to the small number of biopsies taken from lesions.
Participant Demographics
14 patients with colorectal carcinoma (5 males, 9 females, median age 69) and 6 patients with gastric adenocarcinomas (median age 59).
Statistical Information
P-Value
p<0.001
Confidence Interval
99.5%
Statistical Significance
p<0.05
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