Immune adaptation and TCS
"stop effect." (A) Immune adaptation (IA) and tissue
longevity. The heart differentiates from early stages of ontogeny (LONG IA)
and functions throughout life. The ovary differentiates later (MODERATE
IA), and its normal function is limited by follicular renewal (until 35-40
years of age). Aging primordial follicles (apf) persist until exhausted
(physiologic menopause). SHORTER period of ovarian development during IA
causes earlier termination of follicular renewal during adulthood and
results in POF. SHORT period of ovarian development during IA causes no
follicular renewal and results in primary amenorrhea. Absence of corpora
lutea (CL) during immune adaptation causes their cyclic degeneration,
except during pregnancy, which is accompanied by immune suppression. fpf,
fetal primordial follicles; fr, follicular renewal; POF, premature ovarian
failure; CL, corpus luteum. Adapted from Ref. [31].
(B) Stages of cell differentiation during immune adaptation (left)
sets TCS "stop effect" (StE) for tissue physiology and pathology
during adulthood. Arrowheads indicate a tendency to StE "shifts" with age.
Adapted from Ref. [3,30,33,108].