Avaliação dos efeitos da piometra na viabilidade de oócitos caninos imaturos pela utilização do azul cresil brilhante / Evaluation of the effects of pyometra on the viability of immature canine oocytes through the use of brilliant cresyl blue

The bitch is an experimental model of wild and even endangered canids. Therefore, the study of the factors that influence your fertility benefits scientific advances in both segments. Knowing that pyometra is one of the common uterine pathologies in bitches, this work aimed to evaluate the effects of pyometra on the morphology and competence of canine oocytes through the use of Azul Cresil Brilhante (ACB). For this purpose, 1197 canine oocytes that were divided into 2 groups classified as control (healthy) and treatment (pyometra). They were morphologically classified into grade 1 (G1), grade 2 (G2) and grade 3 (G3) and according to the ACB stain as ACB (+) and ACB (­) (not stained). Bitches in the healthy group had higher amounts of total oocytes (795) and better quality (495 oocytes G1) and competence (45 ± 9.8 ACB (+)). The use of ACB was useful to distinguish the competence of the studied oocytes and can be an auxiliary tool for choosing the best oocytes.

Influência da idade sobre a qualidade de oócitos imaturos caninos / Influence of age on the quality of immature canine oocyte

Among some factors that influence the quality of canine oocytes, age is well studied. Knowing that the morphological assessment of oocytes is a useful tool for this analysis, the use of new techniques such as the brilliant cresyl blue staining (BCB) increases this assessment. The objective of this work was to analyze the quantity and the oocyte quality of bitches in different age groups through the conventional morphological evaluation, in addition to the bright cresyl blue dye. For this purpose, 2.302 oocytes from 33 bitches were divided into four age groups from 1 to 3 years old; 4-6, 7-10 and over 10 years old and their oocytes were classified as G1, G2 and G3, as well as stained (BCB (+)) and non-stained (BCB (-)). The values were compared using the Kruskal test -Wallis and Dunn post-test, by which it was possible to obtain higher amounts of G1 and BCB (+) oocytes in the range of 1 to3 years, indicating that this range oocytes have a greater chance of success in fertilization processes and in vitro production, for example.

Influência da idade sobre a qualidade de oócitos imaturos caninos / Influence of age on the quality of immature canine oocyte

Among some factors that influence the quality of canine oocytes, age is well studied. Knowing that the morphological assessment of oocytes is a useful tool for this analysis, the use of new techniques such as the brilliant cresyl blue staining (BCB) increases this assessment. The objective of this work was to analyze the quantity and the oocyte quality of bitches in different age groups through the conventional morphological evaluation, in addition to the bright cresyl blue dye. For this purpose, 2.302 oocytes from 33 bitches were divided into four age groups from 1 to 3 years old; 4-6, 7-10 and over 10 years old and their oocytes were classified as G1, G2 and G3, as well as stained (BCB (+)) and non-stained (BCB (-)). The values were compared using the Kruskal test -Wallis and Dunn post-test, by which it was possible to obtain higher amounts of G1 and BCB (+) oocytes in the range of 1 to3 years, indicating that this range oocytes have a greater chance of success in fertilization processes and in vitro production, for example.(AU)

Primeira avaliação da obtenção e qualidade de oócitos post mortem de lhamas pelo azul cresil brilhante / First recovery and quality assessment of post mortem oocytes from lhamas by brilliant cresyl blue

This study aimed to demonstrate the applicability of the ovarian slicing technique in the recovery of post mortem oocytes in a llama (lama glama) victim of acute bronchopneumonia and the effectiveness of the brilliant cresyl blue (ACB) technique to select quality oocytes for a subsequent in vitro culture. The ovary-salpinge-hysterectomy (OSH) was performed 12 hours after the animal's death. The ovaries were transported refrigerated immediately to the laboratory in Leibovitz medium (L-15). The oocytes were identified, quantified under a stereomicroscopic and classified according to two methods: conventional morphological classification and ACB assay. 26 oocytes classified by conventional morphology were obtained: 10 oocytes grade 1, 12 oocytes grade 2 and 4 oocytes grade3. The use of the ACB dye demonstrated that 88% of the evaluated oocytes maintained their quality and were competent for the conservation of genetic or future material application in reproductive biotechnologies in this species. Further studies are suggested aiming to use selected oocytes with ACB to enhance the success of in vitro culture in this species.

Primeira avaliação da obtenção e qualidade de oócitos post mortem de lhamas pelo azul cresil brilhante / First recovery and quality assessment of post mortem oocytes from lhamas by brilliant cresyl blue

This study aimed to demonstrate the applicability of the ovarian slicing technique in the recovery of post mortem oocytes in a llama (lama glama) victim of acute bronchopneumonia and the effectiveness of the brilliant cresyl blue (ACB) technique to select quality oocytes for a subsequent in vitro culture. The ovary-salpinge-hysterectomy (OSH) was performed 12 hours after the animal's death. The ovaries were transported refrigerated immediately to the laboratory in Leibovitz medium (L-15). The oocytes were identified, quantified under a stereomicroscopic and classified according to two methods: conventional morphological classification and ACB assay. 26 oocytes classified by conventional morphology were obtained: 10 oocytes grade 1, 12 oocytes grade 2 and 4 oocytes grade3. The use of the ACB dye demonstrated that 88% of the evaluated oocytes maintained their quality and were competent for the conservation of genetic or future material application in reproductive biotechnologies in this species. Further studies are suggested aiming to use selected oocytes with ACB to enhance the success of in vitro culture in this species.(AU)