[Expression changes of aldehyde dehydrogenase 1A1 in rat cryptorchidism and normal testis]

Objective: To study the mRNA and protein expression of aldehyde dehydrogenase 1A1(ALDH1A1)in rat cryptorchidism and normal testis. Methods: We established the cryptorchidism model by flutamide and took normal testis as normal group.The testicular tissue samples were collected on 15 days, 45 days, and 90 days after birth respectively.The expression of ALDH1A1 in rat cryptorchidism and normal testis were investigated by real-time PCR, Western blot and immunohistochemisty intissue microarray. Results: The mRNA expression of ALDH1A1 in cryptorchidism group in infant, adolescent and adult period were 1.01±0.19, 1.60±0.32, 0.75±0.16, and 1.66±0.23, 0.52±0.08, 0.15±0.10 in normal group, respectively.The expression of ALDH1A1 in cryptorchidism group was significantly lower than that in normal group in infant period, but it was significantly higher than that in the normal group in adolescent and adult period(P<0.05). Conclusions: The expression of ALDH1A1 was different in different age period during the process of testicular development of rat. It showed an important relationship between ALDH1A1 and cryptorchidism.