ABSTRACT
Apoptosis is a physiologic process that deletes unwanted cells without inducing an
inflammatory reaction. Survival of endometriotic implants is associated with decreased
apoptosis and an inflammatory environment. The most widely accepted theory-transplantation
theory-related to the pathogenesis of endometriosis is supported by the description
of abnormal survival of regurgitated endometrial cells. Eutopic endometrial cells
from women with endometriosis also seem to resist apoptosis further when compared
with cells from disease-free women. Several apoptotic pathways have been studied.
Recent literature concerning apoptosis-related genes such as bcl-2/bax and fas/fas
ligand is summarized in this article. Special emphasis is placed on sex steroid modulation
and cell adhesion regulation, both relevant in early events of endometriosis.
KEYWORDS
Apoptosis - bcl-2 - fas ligand - endometrium