Document Detail

Microencapsulation of canine sperm and its preservation at 4 degrees C.
MedLine Citation:
PMID:  20056269     Owner:  NLM     Status:  MEDLINE    
The objective of this study was to develop a preservation method for canine sperm using microencapsulation. Pooled ejaculates from three beagles (Canis familiaris) were extended in egg yolk Tris extender and were encapsulated in gel (alginate only) or polycation (poly-L-lysine membrane bound) microcapsules at 0.75% and 1.0% alginate concentration. In Experiment 1, characteristics of microcapsule and microencapsulated sperm were evaluated during chilling storage for 48 h. Gel microcapsules at 0.75% alginate concentration had a teardrop-like structure with fragility, whereas those at 1.0% alginate had a solid spherical structure. In all groups, diameter of the microcapsules increased with duration of storage (P<0.05). Alginate concentration did not affect the sperm recovery rate from microcapsules. Total average recovery rate of sperm from polycation microcapsules was lower than that of gel microcapsules (P<0.05). Progressive motility of polycation microencapsulated sperm and unencapsulated sperm (control) was higher than that of the gel microencapsulated sperm, both at 0.75% and 1.0% alginate concentration (P<0.05), although viability of sperm was similar among the three groups. In Experiment 2, to evaluate the sperm longevity after chilling storage, sperm were microencapsulated in polycation microcapsules at 1.0% alginate concentration, stored at 4 degrees C for 0, 1, 4, and 7 d, and then cultured at 38.5 degrees C for 0, 6, and 24h. Progressive motility and viability of microencapsulated sperm were higher than those of unencapsulated spermatozoa at 0 to 24h of culture after 4 and 7 d of chilling storage (P<0.05). In conclusion, polycation microencapsulation at 1.0% alginate concentration can be successfully applied for chilling storage of canine sperm by maintaining motility and viability for up to 7 d.
S Shah; M Nagano; Y Yamashita; M Hishinuma
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-01-06
Journal Detail:
Title:  Theriogenology     Volume:  73     ISSN:  1879-3231     ISO Abbreviation:  Theriogenology     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-02-17     Completed Date:  2010-05-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0421510     Medline TA:  Theriogenology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  560-7     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Inc. All rights reserved.
United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.
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MeSH Terms
Capsules / chemistry
Cell Survival / physiology
Cold Temperature*
Drug Compounding / adverse effects,  methods*
Particle Size
Polyamines / chemistry
Refrigeration / methods
Semen Preservation / instrumentation,  methods*
Sperm Count
Sperm Motility / physiology
Spermatozoa* / cytology
Reg. No./Substance:
0/Capsules; 0/Polyamines; 0/polycations

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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