in addition , our observations suggest that either 1 ) the cd4-positive cells infiltrating the uterus following estrogen treatment may use a nonpertussigen-sensitive mechanism for chemotactic factor-receptor signal transduction or 2 ) a subpopulation of resident uterine cells can be induced to express the cd4 antigen following estrogen and/or estrogen plus pertussigen treatment .
C0037083
signal
C0007634
cells