Acta Anatomica Sinica ›› 2017, Vol. 48 ›› Issue (1): 87-91.doi: 10.16098/j.issn.0529-1356.2017.01.015

• Histology,Embryology and Developmental Biology • Previous Articles     Next Articles

Effect of cryopreservation on the expression of sperm surface protein PH-20 and ratio of apoptosis in normal birth and infertility

MA Xiao-ping 1,2 GAO Xiao-qin 2* ZHOU Hua3 WANG Jun4   

  1. 1. Department of Histology and Embryology, Guizhou Medical University, Guiyang 550004,China;2. Department of Histology and Embryology, Zunyi Medical and Pharmaceutical College, Guizhou Zunyi 563006,China;3. Reproductive Medicine Center, Affiliated Hospital of Guizhou Medical University, Guiyang 550004,China;4. Clinical Experience Center, Affiliated Hospital of Guizhou Medical University, Guiyang 550004,China

  • Received:2016-05-09 Revised:2016-08-26 Online:2017-02-06 Published:2017-02-06
  • Contact: GAO Xiao-qin E-mail:meryma0729@163.com

Abstract:

Objective To investigate the effect of cryopreservation on the expression of sperm surface protein PH-20 and the sperm apoptosis. Methods Semen samples were obtained from fertile men (n=14, group A) and infertile men (n=20, group B). Western blotting was used to detect the PH-20 protein expression in human spermatozoa.The localization of this protein on human spermatozoa was determined by indirect immunofluorescent staining using PH-20 antibody. The sperm apoptosis was examined by terminal deoxynucleotidyl transferase(TdT) mediated deoxyuridine triphophate-biotin nick end labeling(TUNEL). Results After cryopreservation, the level of PH-20 protein expression was significantly lower in both group A and B than that of fresh sperm (P<0.05). The percentage of PH-20 positive rate was significantly lower in both group A and B than that of fresh sperm (P<0.05). The ratio of sperm apoptosis was not significantly different in thawed group A than that of fresh sperm (P>0.05). The ratio of sperm apoptosis was significantly lower in thawed group B than that of fresh sperm (P<0.05).
Conclusion Cryopreservation caused significant reduction of PH-20 protein expression, the percentage of PH-20 positive rate in human sperm. But the cryopreservation had no significant influence on normal fertility of sperm apoptosis.

Key words: Sperm, Cryopreservation, PH-20, Western blotting, Human