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. 1974 Oct;15(10):783–787. doi: 10.1136/gut.15.10.783

An investigation into the enzyme histochemistry of adenocarcinomas of human large intestine and of the transitional epithelium immediately adjacent to them

J R Marsden, I M P Dawson
PMCID: PMC1412985  PMID: 4154840

Abstract

Histochemical enzymatic studies were performed on 30 freshly resected large bowel carcinomas, 30 samples of normal colonic epithelium, and six samples of the histologically normal epithelium (so-called transitional epithelium) immediately adjacent to a carcinoma. Five enzymes were studied: nicotine adenine dinucleotide tetrazolium reductase (NADH-TR), glucose-6-phosphate dehydrogenase, succinate dehydrogenase, monoamine oxidase, and acid phosphatase.

Quantitative and qualitative differences in enzyme activity were observed between normal, transitional, and carcinomatous mucosa as follows: monoamine oxidase activity was moderate in normal mucosa, high in transitional mucosa, and low in carcinoma. Succinate dehydrogenase activity was high in transitional mucosa and low or moderate in normal and carcinomatous mucosa. Glucose-6-phosphate dehydrogenase activity showed a gradation from low in normal mucosa to high in carcinoma while acid phosphatase showed the reverse of this pattern. The tetrazolium reductase activity was low or moderate in normal and transitional mucosa and high in carcinoma.

These differences in enzyme activity and their possible clinical and metabolic significance are discussed.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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