Efficiency of antifreeze glycoproteins for cryopreservation of Nili-Ravi (Bubalus bubalis) buffalo bull sperm

S. Qadeer, M. A. Khan, M. S. Ansari, B. A. Rakha, R. Ejaz, R. Iqbal, M. Younis, N. Ullah, Arthur L. DeVries, S. Akhter

Research output: Contribution to journalArticlepeer-review

Abstract

Experiments were conducted to evaluate the effect of Antarctic fish antifreeze glycoproteins, (AFGP) size 1-5 (34-10.5kDa) and 7-8 (3.2 and 2.4kDa) in extender on buffalo bull sperm at cooling (4°C) and at post thawing. Semen was collected from three Nili-Ravi buffalo bulls with artificial vagina for 3 weeks. Qualifying ejaculates from each buffalo bull were diluted (at 37°C having 50×106sperm/mL) in tris-citric acid extender containing AFGP at 0 (control), 0.1, 1 and 10μg/mL. An aliquot of diluted semen was evaluated for sperm progressive motility and plasma membrane integrity, while the remaining fraction was cooled to 4°C in 2h. Further, an aliquot of cooled semen was evaluated for the previously described variables and the remaining fraction was cryopreserved (-196°C). After 24h of storage, straws were thawed at 37°C for 30s to assess post-thaw sperm quality. Inclusion of AFGP in the extender did not affect (P>0.05) sperm progressive motility and plasma membrane integrity of buffalo bull sperm at cooling stage (4°C). However, at post thawing, improvement (P<0.05) in sperm progressive motility and plasma membrane integrity was recorded in extender containing AFGP 1-5 and AFGP 7-8 at 1μg/mL compared to the control. Percentage of live sperm with an intact acrosome remained similar (P>0.05) in extenders containing different amounts of AFGP and control. In conclusion, supplementation of 1μg/ml of AFGP in extender improved the motility and plasma membrane integrity of Nili-Ravi buffalo sperm after thawing.

Original languageEnglish (US)
Pages (from-to)56-62
Number of pages7
JournalAnimal reproduction science
Volume157
DOIs
StatePublished - Jun 1 2015

Keywords

  • Antifreeze glycoproteins
  • Buffalo bull sperm
  • Ice crystal

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology
  • Endocrinology

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