[Localization of bcl-2 antiapoptotic protein in the human placenta]

The aim of this investigation was to study the distribution of bcl-2 antiapoptotic protein in various structures of human placenta using immunocytochemical methods. Syncytiotrophoblast was found to have the greatest bcl-2 immunoreactivity, while cytotrophoblastic elements, connective tissue cells of the villi and the blood vessel walls were bcl-2-negative. It is suggested that accumulation of bcl-2 in the syncytiotrophoblast may reflect its high resistance to detrimental factors.