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首页> 外文期刊>Tropical Animal Health and Production >Follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in water buffalo (Bubalus bubalis).
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Follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in water buffalo (Bubalus bubalis).

机译：水牛卵巢无环形成过程中一氧化氮和抗坏血酸的卵泡特征和卵泡内浓度（ Bubalus bubalis ）。

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摘要

The objective of this study was to examine the follicular characteristics and intrafollicular concentrations of nitric oxide and ascorbic acid during ovarian acyclicity in buffaloes. Ovaries were collected from 56 acyclic and 95 cyclic buffaloes at slaughter, surface follicle number was counted and follicles were classified into small (5.0-6.9 mm), medium (7.0-9.9 mm), and large (>=10.0 mm) size categories based on their diameter. Follicular fluid was aspirated and assayed for nitric oxide, ascorbic acid, estradiol, and progesterone. Acyclic buffaloes had a higher (P<0.05) number of medium-sized follicles and a lower (P<0.001) number of large follicles than the cyclic ones. In acyclic animals, the number of large follicles was lower (P<0.01) than in medium size category which in turn was lower (P<0.001) than the number of small follicles. In contrast, the number of medium and large follicles was not different (P2/P4 ratio<1). Small- and medium-sized follicles of acyclic buffaloes had higher concentrations of nitric oxide (P<0.05 and P<0.001, respectively) and lower concentrations of ascorbic acid (P<0.05 and P<0.01, respectively) than the corresponding size estrogen-active follicles of their cyclic counterparts. In conclusion, this study indicates that follicular development continues during acyclicity in buffaloes. Although follicles in some acyclic buffaloes attain a size corresponding to morphological dominance, they are unable to achieve functional dominance, perhaps due to an altered balance of intrafollicular nitric oxide and ascorbic acid and, as a result, these follicles instead of progressing to ovulation undergo atresia.
机译：这项研究的目的是检查水牛卵巢无环过程中的卵泡特征和一氧化氮和抗坏血酸的卵泡内浓度。在屠宰时从56个无环和95个环状水牛中收集卵巢，对卵泡表面计数，并将卵泡分为小尺寸（5.0-6.9 mm），中尺寸（7.0-9.9 mm）和大尺寸（> = 10.0 mm）在它们的直径上。抽吸卵泡液并测定一氧化氮，抗坏血酸，雌二醇和孕酮。非环状水牛的中型卵泡数量较多（ P <0.05），而大型毛囊的数量较少（ P <0.001）。在无周期动物中，大卵泡的数量（ P <0.01）要比中等大小的动物要小（而 P <0.001）要比小卵泡的数量少。卵泡。相反，在周期性对照中，中，大卵泡的数量没有差异（ P <0.001）。与循环对照组相比，无环水牛种群中大卵泡的发生率较低（ P <0.05）。对雌激素状态的评估表明，无环水牛的所有卵泡均不具有雌激素活性（ E 2 / P 4 比<1）。无环水牛的中小型卵泡的一氧化氮浓度较高（分别为 P <0.05和 P <0.001）和较低的抗坏血酸浓度（ P <0.05和 P <0.01）分别比其对应的相应环状雌激素活性卵泡大。总之，这项研究表明，水牛在非周期性期间卵泡发育持续。尽管一些无环水牛的卵泡达到与形态学优势相对应的大小，但它们却无法获得功能优势，这可能是由于卵泡内一氧化氮和抗坏血酸平衡的改变，结果，这些卵泡而不是排卵而不是排卵。

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