Estrogen receptors--known and unknown biological functions.

The present literature review includes the data available from 1995 to 2005 about the biological functions of estrogen receptors (ERs) and their role in tumorigenesis. The domain organisation,and cell and tissue localization of two estrogen receptors are described. The article reviews the well known function of these receptors as transcription factors and their less familiar extracellular "non-genome" effects.

Expression of human blood group antigens A and B in stomach cells of C. carpio, C. auratus, R. ridibunda and H. sapiens.

Human blood group ABH antigens are found not only on red blood cell membranes, but in many other cell types as well. Their biological functions still remain unclear. The aim of the present study was to examine the cellular expression of these antigens in the stomach of representatives of different Vertebrates--Pisces and Amphibia and to compare it with their expression found in Man.