[Radioprotective effect of hypoxic hypoxia (8% O2) for different morphological elements of mouse kidney].

The breathing of gas mixtures containing 8-9% O2 during irradiation of tumors has been tested at several cancer clinics (in Russia and abroad) with the purpose of decreasing the morbidity of normal issues, thus providing the possibility to increase the dose of radiation. Previous experiments have demonstrated a broad spectrum of dose modification factors (DMF) for different normal tissues as well as for different transplanted tumors, with in general larger protection of normal tissues. The present study was designed to assess the radioprotective effect for mouse kidney of breathing a gas mixture containing 8% O2 by morphometry of histological specimens.

[The morphometric characteristics of the erythrocytes and their catecholamine-binding properties in the treatment of stage-II hypertension patients with Renitec].

Morphometric and catecholamine-binding properties of erythrocytes were studied as were their changes in monotherapy with Renitec, an inhibitor of the angiotensin-converting enzyme, of patients with stage II hypertensive disease, using the image digital analysis computing system VIDAS-386 (Kontron Electronik, Germany). Patients with hypertensive disease were shown to develop degenerative changes in their erythrocytes, with catecholamine accumulation in them being a prominent feature, these events taking their course against the background of abnormalities in primary parameters characterizing cardiochemodynamics and regulation of the heart's rhythm. The above patients derived apparent benefit from treatment with Renitec, which fact was evidenced by improvement in parameters associated with the cardiochemodynamics and regulation of the cardiac rhythm, by alleviating the degree of severity of degenerative changes in erythrocytes, and by increase in their content of catecholamines.

[Histochemical and biochemical study of radiation injury of the kidneys in gas hypoxia].

A radioprotective effect of hypoxia was studied in kidney radiation. The use of hypoxic respiratory mixture containing 8% oxygen (the normal content is 21%) enhances kidney resistance to local single and fractionated irradiation. Determination of renal activity of succinate dehydrogenase, lactate dehydrogenase, acid and alkaline phosphatase and urinary N-acetyl-beta-D-glucosaminidase, gamma-glutamyl transferase, alkaline phosphatase, lactate dehydrogenase is recommended as tests for kidney radiation damage.