IGF1R expression in alpaca (Vicugna pacos) ovaries. Preliminary results.

GALLELLI, MF; BIANCHI, C.; LOMBARDO, DM.; MIRAGAYA, MH.

Morocco

Conferencia; The 5th Conference of the International Society of Camelid Research and Development. ISOCARD-2018; 2018

International Society of Camelid

Alpacas are induced ovulators requiring a stimulus in presence of a mature follicle to trigger the ovulatory process. In this species, ovarian activity occurs in waves of follicular growth and regression. During each follicular wave, one follicle becomes dominant, grows to maturity and finally regresses(Chaves et al., 2002). Folliculogenesis and ovulation are regulated by gonadotrophins and other factors such as Insulin like growth factor 1 (IGF1). In various species it has been described that IGF1 stimulates proliferation and differentiation of granulose cells (Monget et al., 2002). Also, in cows,IGF1 receptor (IGF1R) shows different expression according to the size of follicles (Schams et al.,2002). As there are no reports about IGF1R expression in alpacas ovaries, the aim of the study was to evaluate IGF1R expression in alpacas ovaries and analyse if this expression is related to the presenceof corpus luteum (CL).