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. 2015 Apr 7;17(6):942–947. doi: 10.4103/1008-682X.150253

Figure 1.

Figure 1

PPARγ functions in hypothalamic-pituitary-gonadal axis. Pulsatile GnRH production signals gonadotroph cells in the anterior pituitary to produce FSH and LH that then act on the testis to regulate spermatogenic potential. FSH up-regulates the expression of PPARγ through MAPK signaling pathways while LH inhibits the function of PPARγ via various pathways. High expression of testosterone suppresses the secretion of LH by negative feedback, providing a relatively persistent high-expression of PPARγ. PPARγ: peroxisome proliferator-activated receptor gamma; FSH: follicle-stimulating hormone; LH: luteinizing hormone; MAPK: mitogen-activated protein kinase.