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ZOOLOGICAL RESEARCH    2012, Vol. 33 Issue (1) : 19-28     DOI: 10.3724/SP.J.1141.2012.01019
Articles |
Effects of some extenders and monoamines on sperm cryopreservation in tree shrews (Tupaia belangeri)
PING Shu-Huang, WANG Cai-Yun, TANG Wen-Ru, LUO Ying, YANG Shi-Hua
Laboratory of Molecular Genetics of Aging and Tumor, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
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The tree shrew may be an important experimental animal for disease models in humans. The effects of some extenders and momamines on sperm cryopreservation will provide helpful data for experimentation of strains and conservation of genetic resources in tree shrews. Epididymal sperm were surgically harvested from male tree shrews captured around Kunming, China and sperm motility, acrosome integrity and fertility were assessed during cryopreservation. In Experiment 1 eight extenders (TTE, TCG, TCF, TTG, BWW, BTS, DM, and SR) supplemented with 0.4 mol/L DMSO were used to dilute the sperm: only TTE, DM and SR showed no differences in motility and acrosome integrity compared to fresh controls after equilibration. After freezing and thawing, sperm in any extender showed lower motility than fresh control and sperm in DM showed higher motility than other groups. However, BWW produced the lowest motility. For acrosome intergrity, TTE and DM showed higher than BWW, BTS and SR after equilibration. The parameter in DM was higher than other groups (except TTE) after thawing. In Experiment 2 four penetrating cryoprotectant agents (CPA) [dimethyl-formamide (DF), formamide (F), dimethylacetamide (DA), and acetamide (A)] at 0.2 mol/L, 0.4 mol/L, 0.8 mol/L, and 1.2 mol/L, respectively were added to the DM extender. Motility showed no difference among CPA groups and non-CPA group (control) after equilibration, but all thawed sperm showed lower values in motility and acrosome intergrity than pre-freezing groups. However, sperm in 0.8 mol/L DF and 0.4 mol/L DMSO showed higher values in both parameters than that in other CPA groups (P>0.05). In Experiment 3 the fertilization rate of oocytes inseminated with 0.4mol/L DMSO (50%) were higher than that with 0.8mol/L DF (16%). In conclusion, non-ion extenders supplemented with egg yolk may be better for sperm cryopreservation in tree shrews and cryoprotectant effects of monoamines agents should be further studied in this species.

Keywords Tree shrew      Sperm cryopreservation      Extender      Monoamines     
PACS:  Q954.43  
Issue Date: 22 February 2012
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PING Shu-Huang, WANG Cai-Yun, TANG Wen-Ru, LUO Ying, YANG Shi-Hua. Effects of some extenders and monoamines on sperm cryopreservation in tree shrews (Tupaia belangeri)[J]. ZOOLOGICAL RESEARCH,2012, 33(1): 19-28.
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