Histological examinations of chief and parietal cells of the rat gastric glands after experimental administration of cephalexin and ethanol.

The experiment was carried out on Wistar rat males weighting about 200 g. Animals from experimental group I received 20% ethanol for drinking (ad libitum), animals from experimental group II--cephalexin in the dose of 42 mg/24 h, animals from experimental group III--cephalexin and ethanol in mentioned doses. After 10 days animals were decapitated and specimens of the stomach were taken from the greater curvature. It was stated that 10-day administration of 20% ethanol causes hyperemia of the gastric mucous membrane and the decrease of secretory activity of the glands. On the contrary, cephalexin causes the increase of secretory activity of chief and parietal cells. Concomitant administration of ethanol and cephalexin damages the gastric mucous membrane causing its narrowing, flattening of gastric pits and atrophy of secretory cells in the glands.

The influence of experimental administration of ethanol and cephalexin on stomach mucous barrier of rat.

The Wistar rat males weighing approximately 200 g were administered 20% ethanol ad libitum during 10 days, cephalexin in the dose of 42 mg/24 h, and simultaneously ethanol and cephalexin in the above-mentioned doses. After 10 days the animals were decapitated and stomach specimens were taken from the major curvature region for examinations. They were fixed in 10% formalin, dehydrated and immersed in paraffin. For the purpose of estimation changes in activity of gastric gland mucous cells Mc Manus's PAS reaction was performed on 7 micro-thick sections. It was found that ethanol causes functional decrease in the activity of mucous cells. However, cephalexin increases the activity of superficial mucous cells and orifice mucous cells of gastric glands, and inhibits the activity of cervix mucous cells. A simultaneous administration of ethanol and cephalexin causes atrophic changes in gastric glands, and thereby strong reduction of mucous cells activity.

Histological and morphometrical examinations of suprarenal glands in rats after experimental administration of atorvastatin and ethanol.

The experiment was carried out on Wistar rat males weighting about 250 g. Animals from control group I received water and standard granulated fodder ad libitum. Animals from control group II received 20% ethanol instead of water. Animals from experimental group I received Atorvastatin in the dose of 0.28 mg/24h, animals from experimental group II received Atorvastatin in the dose of 2.8 mg/24h, animals from experimental group III received 20% ethanol + Atorvastatin in the dose of 0.28 mg. After 6 weeks the animals were decapitated. H+E staining, PAS method for detection of neutral mucopolysaccharides and Thomas's reaction for detection of lipids were made on 6 micron thick sections. The surface areas of the nuclei sections were assessed in the zona fasciculata. It was stated that ethanol causes strong hyperemia of suprarenal cortex, the high dose of atorvastatin--2.8 mg/24h and small dose of atorvastatin--0.28 mg/24h administered with ethanol cause the decrease of lipid amount in the whole suprarenal cortex and degenerative changes in many cells of the zona fasciculata.

Histological and ultrastructural investigations of placenta villi in intrauterine growth restriction of fetuses (IUGR).

The investigations were carried out on five placentas derived from normal pregnancies and on the five placentas derived from the pregnancies with intrauterine growth restriction (IUGR) of fetuses. Semithin sections were stained with methylene blue and azure and estimated by light microscope. Ultrathin sections were stained according to the Reynold's method and estimated by the electron microscope. Two types of irregularity were observed: 1) lack of vessels with a concomitant increase of macrophage number in the stroma of villi, 2) an increased number of vessels and the presence in syncytiotrophoblast of a wide space near the basal membrane preventing the exchange between the maternal blood and the fetal blood.