Expression of Beclin-1 and LAMP-2 in Rat Hippocampus under Conditions of Simulated Gravity Overload in the Caudocranial Vector.

Structural changes in the rat hippocampus in response to chronic cerebrovascular disorders induced by gravity exposure in the caudocranial vector were studied. Qualitative and quantitative morphological analysis detected significant cytoarchitectonic changes in the pyramidal layer: spongiosis, manifest pericellular and perivascular edema, and a drastic increase in the counts of pyramidal neurons with signs of impairment in all hippocampal zones. The density of perikarya in the pyramidal layer decreased. Immunohistochemical study detected high expression of Beclin-1 in CA1 field. High expression of LAMP-2 was detected in CA4 field. Field CA2 was characterized by the maximum counts of damaged cells and high expression of Beclin-1 and LAMP-2.