[Histocytospectrophotometric characteristics of lung cancer]

The paper presents the results of quantitative changes in the activity of some most important oxidative-reductive enzymes in lung carcinoma cells. The histo- and cytospectrophotometric studies were carried out on the operation material removed from 32 patient with lung carcinoma including 12 cases of squamous cell carcinoma, 12 cases of adenocarcinoma, 4 cases of undifferentiated large cell and 4 cases of undifferentiated small cell carcinoma. Statistically significant increases in the activity of G-6-PDH, NADP-D and LDH were observed in a decreasing degree of tumour differentiation with a simultaneous relative decrease in the activity of SDH, MDH NAD-D and alpha-GPDH. When the activity of oxidoreductases was compared in tumours having the structure of squamous cell carcinoma and adenocarcinoma, a higher activity of LDH, SDH and alpha-GPDH in squamous cell carcinoma and high activity of G-6-PDH and NADP-D in adenocarcinoma were observed. Statistically significant differences in the activity of carbohydrate metabolism enzymes in small cell carcinoma and other histological forms of lung cancer were found: a significant increase in G-6-PDH and LDH and relative decline in the activity of SDH and alpha-GPDH. In all the examined histological forms of lung cancer there was a complete agreement in the results of histo- and cytospectrophotometric examinations of the activity of the main oxidative-reductive enzymes.