[Proliferative activity of rat skin fibroblasts under the action of glucocorticoids and gestagens].

Temporal and concentration dependences of the effect of the new synthetic gestagen 17alpha-acetoxy-3beta-butanoyloxy-6-methyl-pregna-4,6-dien-20-one (ABMP) and reference glucocorticoids (dexamethasone and hydrocortisone) and progesterone on the proliferative activity of rat skin fibroblasts were examined using the MTT assay. The results demonstrated that ABMP along with glucocorticoids produced an antiproliferative action against fibroblasts, with the maximum (38%) suppression of the metabolic activity of cells observed after 5-day incubation at a drug concentration of 10(-5) M.

Activity lysosomal enzymes in rat skin fibroblasts after treatment with progesterone and new gestagen ABMP.

The effects of a new synthetic gestagen 17alpha-acetoxy-3beta-butanoyloxy-6-methyl-pregna-4,6-dien-20-on (ABMP) and reference drug progesterone on rat skin fibroblasts were evaluated by variations in lysosomal enzyme activity (cathepsin D and beta-glucosidase). Our results suggest that ABMP exhibits lysosomotropic properties, which depended on its concentration and time of treatment. The direct effect of progesterone on lysosomal enzyme activity in skin fibroblasts was compared to the influence of systemic treatment with gestagens on skin lysosomes.

[Antistaphylococcal activity of the complex of natural cytokines].

The in vitro study of the action of the complex of natural cytokines (CNC), or preparation Superlymph, on different microbial test strains (Staphylococcus aureus, Escherichia coli, yeast-like fungi of the genus Candida) was carried out. CNC suppressed the growth of S. aureus test culture, depending on the concentration of the preparation.

[The effect of ultrasound, the polyene antibiotic amphotericin B and their combination on the biomembranes of yeast-like fungi in the genus Candida].

The effect of ultrasound (US) and the antibiotic amphotericin (A-B) on the structure of Candida albicans membranes. The most expression of destructive processes and appearance of free radicals in mycetic cells was observed in combination of US and A-B by chemiluminescence and ultrastructural analyses. The mechanisms of action of US and A-B on mycetic cells were discussed in the article.

[The cellular acid phosphatase activity in yeast-like fungi of the genus Candida exposed to ultrasound, polyene antibiotics and dyes].

The activity of one of the lysosomal membrane marker enzymes--acid phosphatase from the Candida yeast fungi on their exposure to ultrasound (US), polyenic antibiotics (amphotericin B and nystatin) dye antiseptics (ethacridine lactate, methylene blue), and their combinations was assayed. The impact of US and the drugs, in particular their combination, was found to be followed by activation of the fungal lysosomal apparatus function and increases in their catabolic processes. The highest rise in lysosomal catabolic activity was found when the polyenic antibiotics were used in combination with US, which reflects the higher damaging effect of this combination against Candida lysosomal membranes than the dyes and of these antibiotics and US alone.

[The lipid spectrum of the skin in psoriasis].

The study was undertaken to examine the lipid composition of and the activity of phospholipase A2 in the skin of patients with psoriasis. There were increases in the levels of phosphatidylcholine, phosphatidylethanolamine and the activity of phospholipase A2 in psoriatic papule as compared to the normal skin. A possible role of glucocorticoids and the revealed abnormalities in the pathogenesis of psoriasis is discussed.

[Effect of dexamethasone on skin phospholipid spectrum in laboratory animals].

The effect of dexamethasone on content of phospholipids in rats' and rabbits' skin has been studied. It has been shown that the present of phospholipids in total content of lipids was more in skin of rats than skin of rabbits. Phosphocholine and phosphatidylethanolamine predominated among phospholipids in human skin as well.

[Effect of estradiol on lipid peroxidation in skin].

The effects of estradiol on intensity of lipid peroxidation in rats' derma and epiderma have been studied. More high level of lipid peroxidation, correlating with activity of water-solved antioxidants of these tissues in comparison with epidermis has been detected in derma. The level of lipid peroxidation decreased in proportion to hormone concentration when adding estradiol to tissue homogenates in vitro.

[Effect of hydrocortisone on the activity of lysosomal enzymes in skin].

The mechanisms of glucocorticoids' effect on the functional activity of lysosomes in rats dermis and epidermis have been studied. The activity of enzymes in both parts of skin in females was more than in ones in males. Intraperitoneal injection of hydrocortisone doesn't change the functional activity of lysosomes in skin in doses less than 1 mg per 100 g of weight apart from the sex of rats.

[Estradiol binding and lipid metabolism in the plasma membrane of myometrial cells during tumor growth].

The study was concerned with evaluation of the parameters of specific binding of 17-beta-estradiol to myometrial plasma membrane in tumor growth versus lipid profile of the membrane and A2 and C phospholipase activity. Tumor growth was shown to involve an increase in the association constant of plasma membrane, changes in the lipid profile and activity of the enzymes. The role of these factors in myometrial carcinogenesis is discussed.

[Evaluation of the capacity of the thymus to accumulate testosterone and of the nature of its interaction with the thymocytes].

It was found out that thymus accumulated 3H-testosterone from blood at the same degree as liver, prostate and skeletal muscle. However, hormone was quickly eliminated from the thymus and prostate accumulated it. Thymocytes bound about 5% of testosterone accumulated by the organ.

[Steroid hormones and lysosomes].

The data on lysosomotropic effect of steroid hormones are reviewed. The effect of steroid hormones correlated with the type of tissues and dose of hormones. A possible role of lysosomes in realization of hormonal signal in the cell biological response is discussed.

[Effect of hydrocortisone on lipid metabolism in the plasma membranes of hepatocytes].

Lipid composition of cell plasma membranes and hepatocyte lysosome phospholipase activity were studied. The data obtained have shown the phospholipid involvement in the realization of steroid hormone effect on the effector cells. The role of lysosomes in the same process is discussed.

[Enzymes of cyclic nucleotide degradation in eye tissues during experimental ocular herpes].

Activity of phosphodiesterases disintegrating cAMP and cGMP in the cornea, sclera and ciliary body was investigated in health and in different stages of experimental herpetic keratitis. The problems concerning the role of the cyclase system in the pathogenesis of herpetic keratitis and the possibility of applying some of the drugs to the disease treatment are discussed.

[Corneal lysosomes in experimental ophthalmoherpes].

Activity and intracellular distribution of lysosomal glucosidases (beta-glucosidase and beta-galactosidase) of the cornea as well as membrane permeability were studied in experimental herpetic keratitis. It was demonstrated that the action of herpes simplex entailed labilization of the lysosomal membranes of the cornea together with the decreased strength of lysosomal association with the enzymes thereby favouring the increased enzyme-substrate contact and excess destruction of cellular and exocellular glycosaminoglycans. The data obtained suggest that lysosomes participate in the pathogenesis of herpetic keratitis.

[Incorporation of labeled cortisol into different types of connective tissue].

The properties of early (BFUen) and late (CFUen) erythropoietin-independent progenitors were studied in bone marrow plasma clot cultures of mice. Syngeneic serum was used as a stimulant of colony formation. It was revealed that serum from polycytemic mice did not alter the efficacy of cloning the erythroid progenitors.

[Lipoperoxidation in eye tissues exposed to hormones].

The effect of hormones of varied action spectrum on lipoperoxidation of unsaturated fatty acids in the eye tissues has been studied. Both antioxidant and prooxidant action of diverse hormones on the sclera, cornea and ciliary body has been demonstrated with respect to the hormonal dose, exposure time and other factors. Potential participation of lipoperoxidation processes in the development of ophthalmopatholody is discussed.

[Responses of different types of connective tissue to hormone administration].

The lysosomal glycosidase activity of the eye tissues (the sclera and cornea), the bone tissues and cartilage were studied. The intraperitoneal injection of tyrocalcitonine (TCT), deoxycorticosterone (DOCS), hydrocortisone (HC), and somatotropic hormone (STH) influenced both the activity of beta-galactosidase, beta-glucosidase, and hyaluronidase, the the functional state of thy lysosomal membranes of the connective tissues under investigation. GC and STH caused stabilization, whereas DOCS and large doses of TCT--a labilizing effect on the lysosomal membranes and tissues understudy.