Assessment of canine oocyte viability after transportation and storage under different conditions.

Assessment of canine oocyte viability after transportation and storage under different conditions. Research Abstract Details 

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Assessment of canine oocyte viability after transportation and storage under different conditions. Abstract Text:

To improve assisted reproductive technologies in the domestic dog, different transport treatments were evaluated for their ability to maintain viability of canine oocytes, as assessed by esterase activity 8h after storage or after 48h of in vitro maturation (IVM) culture. In Experiment 1, ovaries were transported within reproductive tracts or were excised and stored at either 20 or 37 degrees C in phosphate buffered saline. Oocytes collected from reproductive tracts transported at 37 degrees C had the greatest viability after storage (P<0.05). However, after IVM there were no significant differences among any of the four storage conditions in oocyte viability or meiotic resumption (P=0.05). In Experiment 2, isolated oocytes were transported in either TCM-199 with Hank's salts and Hepes buffer or in TL-Hepes at either 20 or 37 degrees C, or in maturation medium equilibrated with 5% CO(2) at 37 degrees C. In Experiment 2, oocytes transported in Hepes buffered media at 37 degrees C had greater viability rates after storage than did those transported in these same media at 20 degrees C or in sodium bicarbonate buffered medium at 37 degrees C (P<0.001). After IVM, oocytes transported in the 37 degrees C treatment groups had greater viability rates than did those transported at 20 degrees C (P<0.01). Overall, isolated oocytes transported at 37 degrees C had greater rates of meiotic resumption than did those transported at 20 degrees C (P<0.05). Taken together, these data indicate that canine oocytes exhibited sensitivity to lesser temperatures and maintained greater rates of viability during transport at 37 degrees C. Isolated oocytes maintained greater viability than oocytes transported in situ. Hepes buffered media increased viability rates for isolated oocytes transported at 37 degrees C compared to a similar medium buffered with sodium bicarbonate.

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Assessment of canine oocyte viability after transportation and storage under different conditions. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Animal reproduction science

VOLUME: 105

Page Numbers: 451-6

Journal Abbreviation: Anim. Reprod. Sci.

ISSN: 0378-4320

DAY: 28

MONTH: 12

YEAR: 2007

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LANGUAGE: eng

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AFFILIATION: College of Veterinary Medicine, Department of Physiology and Pharmacology, Texas A&M University, College Station, TX, 77843-4466, USA.

Country: Netherlands

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MEDLINETA: Anim Reprod Sci

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