CCS e amiloide A do leite de quartos mamários tratados na secagem com plasma rico em plaquetas autólogo, associado ou não a antibiótico / [CCS and Amyloid A of milk from breast quarters treated in drying with autologous platelet-rich plasma, with or without antibiotics]

Este estudo teve como objetivo avaliar biomarcadores de mastite após terapia da secagem com plasma rico em plaquetas (PRP), associado ou não a antibiótico. Trinta e seis quartos mamários foram utilizados em três tratamentos (T): T1 - antibiótico (ATB), T2 - PRP e T3 - PRP + ATB. Amostras de leite foram coletadas antes da secagem (A1), no parto (D0) e 14, 30 e 60 dias pós-parto (D14, D30 e D60), para determinar contagem de células somáticas (CCS) e amiloide A (AA). O delineamento foi inteiramente ao acaso, com arranjo em parcelas subdivididas (SigmaPlot®). Dados de CCS foram transformados (log 10). As médias foram comparadas utilizando-se testes de Tukey ou Holm-Sidak (P<0,05). A CCS em A1 foi elevada em todos os grupos (P>0,05). No D30, CCS foi maior em T2 (P<0,05), igualando-se no D60. Não houve diferença na AA entre Ts em qualquer dia de coleta (P>0,05). Houve diferença nos momentos de coleta (P<0,05), A1 maior que D14 e D30. Houve uma correlação positiva fraca com CCS (0,280). Os tratamentos foram semelhantes em manter a saúde da glândula mamária na lactação subsequente. O PRP intramamário pode ser usado para terapia de vaca seca em casos de mastite subclínica.(AU)

This study aimed to evaluate biomarkers of mastitis after autologous platelet rich plasma (PRP) dry cow therapy, associated or not with antibiotic, compared to conventional treatment. Thirty-six mammary quarters were used in three treatments (T): T1 - antibiotic, T2 - PRP and T3 - PRP + ATB. Milk samples were collected before drying (A1), on calving (D0) and at 14, 30 and 60 days postpartum (D14, D30 and D60), for Somatic Cell Count (CCS) and amyloid dosage A (AA). The design was completely randomized with arrangement in subdivided plots (SigmaPlot ®). Data from CCS were transformed in log10. Means were compared using the Tukey or Holm-Sidak tests, at a 95% confidence level (P<0.05). CCS in A1 was elevated in allgroups (P>0.05). On D30 CCS was higher in T2 (P<0.05), matching D60. There was no difference in AA among T on any day of collection (P>0.05). There was difference in collection moments (P<0.05), A1 different from D14 and D30. There was a weak positive correlation with CCS (0.280). Three treatments were similar in maintaining the health of the mammary gland at subsequent lactation. PRP intramammary can be used for dry cow therapy in subclinical mastitis.(AU)

Progenitor cells and TNF-alpha involvement during morphological changes in pancreatic islets of obese mice.

Overnutrition during pregnancy and lactation lend increasing support to the development of obesity and several chronic diseases in adulthood such as type 2 diabetes mellitus, which leads to beta-cell dysfunction and insulin resistance. In this work, we aimed to study the effects of early life overnutrition on the development of obesity, analyzing the morphological changes, expression of TNF-α, and also the stem cell marker CD133 in the pancreatic islets of young and adult mice. Overnutrition during lactation phase was used as an experimental model to induce obesity. The animals were analyzed at 28 and 150 days of age, when pancreata were collected for histological, ultrastructural and western blotting analysis. The results showed that islet hypertrophy is established in obese groups at day 28 and remained until adulthood. CD133+ cells were observed as small cells within pancreatic islets in both control and obese young mice. However, at day 150, these cells were observed only in the islet peripheries and near ducts of the obese group. Furthermore, TNF-α expression in pancreatic islets was increased in both young and adult obese groups when compared to control groups. This work shows interesting data about CD133 receptor and TNF-α roles in the pancreas during obesity development.