Resultado da pesquisa (3)
Termo utilizado na pesquisa Ai D.
#1 - Distribution of nesfatin-1 expression in Bactrian camels and its impact on adipocyte glucose metabolism
Abstract in English:
The study aimed to investigate the distribution and expression of nesfatin-1 in Bactrian camels and its impact on adipocyte glucose metabolism. Polyclonal antibodies against a single antigenic epitope of NUCB2/nesfatin-1 protein were prepared. Nesfatin-1 expression was detected in various adipose tissues, including the hypothalamus, humps, stomach, duodenum, jejunum, ileum, cecum, colon, rectum, pancreas, liver, and abdomen, using Western blot and qRT-PCR. Glucose uptake levels, pyruvic acid content, and hexokinase and phosphofructokinase activities were measured in cultured 3T3-L1 preadipocytes treated with nesfatin-1 in a high glucose state using a non-radiofluorimetric assay. The results showed that nesfatin-1 was found in all Bactrian camel tissues, with higher adipose tissue and pancreas expression. However, qRT-PCR analysis revealed higher expression of nesfatin-1 mRNA in the abdominal fat and liver. After nesfatin-1 treatment, a significant decrease (p<0.05) was observed in glucose uptake levels, hexokinase, and phosphofructokinase activities in 3T3-L1 cells, with a significant increase (p<0.05) in their pyruvic acid content. These findings suggest that nesfatin-1 is expressed at high levels in the abdominal fat of Bactrian camels and significantly affects adipocyte glucose metabolism by regulating blood glucose levels, inhibiting adipocyte differentiation, and promoting lipid droplet hydrolysis to provide energy for the organism, which may relate to the Bactrian camel’s ability to adapt to harsh environments.
Abstract in Portuguese:
The study aimed to investigate the distribution and expression of nesfatin-1 in Bactrian camels and its impact on adipocyte glucose metabolism. Polyclonal antibodies against a single antigenic epitope of NUCB2/nesfatin-1 protein were prepared. Nesfatin-1 expression was detected in various adipose tissues, including the hypothalamus, humps, stomach, duodenum, jejunum, ileum, cecum, colon, rectum, pancreas, liver, and abdomen, using Western blot and qRT-PCR. Glucose uptake levels, pyruvic acid content, and hexokinase and phosphofructokinase activities were measured in cultured 3T3-L1 preadipocytes treated with nesfatin-1 in a high glucose state using a non-radiofluorimetric assay. The results showed that nesfatin-1 was found in all Bactrian camel tissues, with higher adipose tissue and pancreas expression. However, qRT-PCR analysis revealed higher expression of nesfatin-1 mRNA in the abdominal fat and liver. After nesfatin-1 treatment, a significant decrease (p<0.05) was observed in glucose uptake levels, hexokinase, and phosphofructokinase activities in 3T3-L1 cells, with a significant increase (p<0.05) in their pyruvic acid content. These findings suggest that nesfatin-1 is expressed at high levels in the abdominal fat of Bactrian camels and significantly affects adipocyte glucose metabolism by regulating blood glucose levels, inhibiting adipocyte differentiation, and promoting lipid droplet hydrolysis to provide energy for the organism, which may relate to the Bactrian camel’s ability to adapt to harsh environments.
#2 - Use of infrared thermography in Quarter Horse submitted to team roping
Abstract in English:
This study aimed to verify whether the body and local temperatures change after high-intensity, short-duration exercise (team roping) and whether different pieces of training influence these changes. To this end, twelve animals, males and females, aged 3-6 years, with an average weight of 450 kg, were used. The horses were divided into two groups: regular training (RTG) and sporadic training (STG). The surface temperatures were assessed using a specific thermal camera. Temperatures of the ocular, thoracolumbar, distal tendon (thoracic and pelvic limbs) and croup regions were measured 30 min before, immediately after, and one, two, six and 24 hours after competition simulation. In the RTG, there was an increase in surface eye temperature two hours after exercise, returning to baseline level 24 hours later. In the STG, increase in eye temperature occurred immediately after exercise and returned to baseline level two hours later. Temperature of the pelvic limb tendons and croup (right side) rose immediately after exercise and did not return to baseline level 24 hours later. Team roping exercise increased the surface temperature of the distolateral thoracic and pelvic limb, croup and thoracolumbar regions in both groups and the eye temperature in the STG. Training frequency influenced the surface temperature profile in the distolateral pelvic limb, croup and thoracolumbar regions.
Abstract in Portuguese:
Os objetivos do presente estudo foram verificar se as temperaturas corpóreas e locais se alteram após exercício de alta intensidade e curta duração (prova de laço em dupla) e se treinamentos distintos podem influenciar nestas alterações. Foram utilizados 12 animais, machos e fêmeas, com idade entre 3 e 6 anos e peso médio de 450kg. Os animais foram divididos em dois grupos: treino regular (GTR) e treino esporádico (GTE). As aferições da temperatura por meio de termografia infravermelha foram feitas por uma câmera termal específica. As medições das temperaturas das regiões ocular, toracolombar, tendíneas distais (membros torácicos e pélvicos) e garupa foram realizadas 30 minutos antes, imediatamente depois, uma, duas, seis e 24 horas após a simulação de competição. No GTR houve aumento de temperatura ocular duas horas após o exercício, retornando ao basal apenas 24 horas depois. No GTE o aumento ocorreu imediatamente após o exercício e retornando ao basal duas horas depois. As temperaturas da região dos tendões dos membros pélvicos e garupa (lado direito) elevaram-se imediatamente após o exercício e não retornaram ao basal após 24 horas. O exercício de laço em dupla aumentou as temperaturas superficiais nas regiões distolateral de membros torácicos e pélvicos, garupa e região toracolombar de ambos os grupos e da temperatura ocular do GTE. A frequência de treinamento influenciou o perfil de temperatura superficial na região distal de membros pélvicos, garupa e toracolombar.
#3 - Evaluation of lactatemia and muscle enzymes in Quarter Horses subjected to team ropping with different types of training, 38(9):1856-1862
Abstract in English:
ABSTRACT.- Pereira M.S., Gerardi B., Denadai D.S., Chaves A.A., Barbosa J.P.B., Zanon J.E.O., Gomide L.M.W. & Mendes L.C.N. 2018. [Evaluation of lactatemia and muscle enzymes in Quarter Horses subjected to team ropping with different types of training.] Avaliação da lacatatemia e das enzimas musculares de equinos Quarto de Milha submetidos à prova de laço em dupla com diferentes tipos de treinamento. Pesquisa Veterinária Brasileira 38(9):1856-1862. Departamento de Clínica, Cirurgia e Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual Paulista, Campus de Araçatuba, Rua Clóvis Pestana 793, Bairro Dona Amélia, Araçatuba, SP 16050-680, Brazil. E-mail: marijeronymo@hotmail.com
The aim of this study was to evaluate the influence of different types of training on physical fitness through the determination of blood lactate and serum creatinine kinase, aspartate aminotransferase, and lactate dehydrogenase activity after high intensity and short duration physical exercise. Venous blood samples were obtained from 16 Quarter Horses, divided into two groups: the regular training group (GTR) and sporadic training group (GTE), in seven different moments: 30 minutes before exercise (M0), immediately after the exercise (M1), 30 minutes (M2), one hour (M3), two hours (M4), six hours (M5) and 24 hours (M6) after the exercise. For statistical analysis, data was tested for normality and homogeneity of variances. To compare the groups and times in each group, parametric tests (ANOVA) were used for muscular enzymes activity and not parametric tests (Mann-Whitney and Friedmann) were used to analyze blood lactato (P<0.05). There was no significant difference between groups for any variable. However, within the experimental groups it was possible to observe significant differences between the evaluated moments, in relation to lactate and LDH. In the GTE, significant differences were observed for lactate between M0 and M1, with respective values ​​of 0.90 mmol/L (min. 0.8, max. 1.6) and 3.65 mmol/L (min. 1.0, max. 5,7) and for LDH, where the values ​​described in M6 differed significantly from M0, M1, M2, M3 and M4. In the GTR, significant differences between the experimental moments were observed in relation to LDH, and the values ​​observed in M6 were the lowest and differed significantly from those found in M1, M2, M3 and M4. In conclusion, there was no difference between the fitness of animals regularly trained and those trained sporadically. The low magnitude of elevations of serum CK, AST and LDH activity after exercise and the quick return to baseline values, including the blood lactate observed in both groups, suggest that all of evaluated animals were conditioned and able to perform such physical activity.
Abstract in Portuguese:
RESUMO.- Pereira M.S., Gerardi B., Denadai D.S., Chaves A.A., Barbosa J.P.B., Zanon J.E.O., Gomide L.M.W. & Mendes L.C.N. 2018. [Evaluation of lactatemia and muscle enzymes in Quarter Horses subjected to team ropping with different types of training.] Avaliação da lacatatemia e das enzimas musculares de equinos Quarto de Milha submetidos à prova de laço em dupla com diferentes tipos de treinamento. Pesquisa Veterinária Brasileira 38(9):1856-1862. Departamento de Clínica, Cirurgia e Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Estadual Paulista, Campus de Araçatuba, Rua Clóvis Pestana 793, Bairro Dona Amélia, Araçatuba, SP 16050-680, Brazil. E-mail: marijeronymo@hotmail.com
O objetivo do trabalho foi avaliar a influência de diferentes tipos de treinamento sobre o condicionamento físico de equinos por meio da determinação do lactato sanguíneo e da atividade sérica de creatina quinase, aspartato aminotransferase e lactato desidrogenase após exercício físico de alta intensidade e curta duração. Amostras de sangue venoso foram obtidas de 16 equinos da raça Quarto de Milha, divididos em dois grupos: grupo de treinamento regular (GTR) e grupo de treinamento esporádico (GTE), em sete diferentes momentos: 30 minutos antes do exercício (M0), imediatamente após (M1), 30 minutos (M2), uma (M3), duas (M4), seis (M5) e 24 (M6) horas após o exercício. Para a análise estatística, os dados foram testados quanto à normalidade e homogeneidade de variâncias. Para comparar os grupos e os momentos em cada grupo foram utilizados testes paramétricos (ANOVA) para a análise das atividades séricas das enzimas musculares e não paramétricos (Mann-Whitney e Friedmann) para a análise do lactato sanguíneo (P<0,05). Não houve diferença significativa entre os grupos para nenhuma variável. No entanto, dentro dos grupos experimentais foi possível observar diferenças significativas entre os momentos avaliados, em relação ao lactato e à LDH. No GTE, foram observadas diferenças significativas quanto ao lactato, entre o M0 e o M1, com valores respectivos de 0,90 mmol/L (mín. 0,8 - máx. 1,6) e 3,65mmo/L (mín. 1,0 - máx. 5,7) e quanto à LDH, onde os valores descritos no M6 diferiram significativamente de M0, M1, M2, M3 e M4. No GTR, diferenças significativas entre os momentos experimentais foram observadas em relação à LDH, sendo que os valores observados no M6 foram os menores e diferiram significativamente daqueles encontrados no M1, M2, M3 e M4. Em conclusão, não houve diferença entre o condicionamento físico dos animais treinados regularmente e aqueles treinados esporadicamente. A baixa magnitude das elevações das concentrações de CK, AST e LDH após o exercício e o rápido retorno aos valores basais, inclusive do lactato, observados em ambos os grupos, sugere que todos os animais avaliados estavam condicionados e aptos a realizar tal atividade física.
