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Quantification of hsp70 gene expression and determination of capacitation status of magnetically separated cryopreserved bovine spermatozoa at different thawing temperature and time
Syarifah Faezah Syed Mohamad1, Nur Hilwan Ismail2, Farida Zuraina3, Mohd Yusof4, Siti Fatimah Ibrahim5, Farah Hanan Fathihah Jaafar6, Chew Fang Nang7, Khairul Osman8.
The role of heat shock protein in reproduction is widely known as a molecular chaperone in aiding and repairing protein
formation when stress occurred. The present objectives were to evaluate the effect of different thawing temperature and
time on the expression of HSP70 gene expression and the capacitation status in cryopreserved bovine spermatozoa. Briefly,
fresh ejaculates were obtained from three different adult bulls. The semen then underwent a sperm washing technique
known as Magnetic Activated Cell Sorting System (MACS) and later on, cryopreserved. The sperm- containing straws
were then thawed at five different thawing temperatures and time post-cryostorage; 20°C for 13 s, 37°C for 30 s, 40°C
for 7 s, 60°C for 6 s and 80°C for 5 s. The RNA was extracted from each of the sperm’s pellets and converted to cDNA
prior to the qPCR process. Capacitation status was then determined by means of CTC assay. The results showed that after
the process of amplification, there is a significant different of HSP70 gene expression in MACS process samples when the
thawing process was performed at 37°C for 30 s, with p<0.05. Furthermore, the CTC assay also showed that thawing at
the same temperature gave less capacitated spermatozoa with p<0.05. As a conclusion, MACS yield spermatozoa with a
better expression of HSP70 gene and less capacitated spermatozoa when thawing was done at 37°C for 30 s.
Affiliation:
- Universiti Teknologi MARA, Malaysia
- Universiti Teknologi MARA, Malaysia
- Universiti Teknologi MARA, Malaysia
- Universiti Teknologi MARA, Malaysia
- Universiti Kebangsaan Malaysia Medical Centre, Malaysia
- Universiti Kebangsaan Malaysia Medical Centre, Malaysia
- Universiti Kebangsaan Malaysia Medical Centre, Malaysia
- Universiti Kebangsaan Malaysia, Malaysia
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Indexed by |
MyJurnal (2021) |
H-Index
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6 |
Immediacy Index
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0.000 |
Rank |
0 |
Indexed by |
Web of Science (SCIE - Science Citation Index Expanded) |
Impact Factor
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JCR (1.009) |
Rank |
Q4 (Multidisciplinary Sciences) |
Additional Information |
JCI (0.15) |
Indexed by |
Scopus 2020 |
Impact Factor
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CiteScore (1.4) |
Rank |
Q2 (Multidisciplinary) |
Additional Information |
SJR (0.251) |
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