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1.
Nutrients ; 13(7)2021 Jul 10.
Artigo em Inglês | MEDLINE | ID: mdl-34371878

RESUMO

Alzheimer's disease (AD) is characterized by the aberrant processing of amyloid precursor protein (APP) and the accumulation of hyperphosphorylated tau, both of which are accompanied by neuroinflammation. Dietary supplementation with spray-dried porcine plasma (SDP) has anti-inflammatory effects in inflammation models. We investigated whether dietary supplementation with SDP prevents the neuropathological features of AD. The experiments were performed in 2- and 6-month-old SAMP8 mice fed a control diet, or a diet supplemented with 8% SDP, for 4 months. AD brain molecular markers were determined by Western blot and real-time PCR. Senescent mice showed reduced levels of p-GSK3ß (Ser9) and an increase in p-CDK5, p-tau (Ser396), sAPPß, and the concentration of Aß40, (all p < 0.05). SDP prevented these effects of aging and reduced Bace1 levels (all p < 0.05). Senescence increased the expression of Mme1 and Ide1 and pro-inflammatory cytokines (Il-17 and Il-18; all p < 0.05); these changes were prevented by SDP supplementation. Moreover, SDP increased Tgf-ß expression (p < 0.05). Furthermore, in aged mice, the gene expression levels of the microglial activation markers Trem2, Ym1, and Arg1 were increased, and SDP prevented these increases (all p < 0.05). Thus, dietary SDP might delay AD onset by reducing its hallmarks in senescent mice.


Assuntos
Doença de Alzheimer/prevenção & controle , Encéfalo/efeitos dos fármacos , Suplementos Nutricionais , Plasma , Doença de Alzheimer/genética , Doença de Alzheimer/metabolismo , Doença de Alzheimer/patologia , Peptídeos beta-Amiloides/metabolismo , Precursor de Proteína beta-Amiloide/metabolismo , Ração Animal , Animais , Encéfalo/metabolismo , Encéfalo/patologia , Quinase 5 Dependente de Ciclina/metabolismo , Citocinas/genética , Citocinas/metabolismo , Modelos Animais de Doenças , Regulação da Expressão Gênica , Glicogênio Sintase Quinase 3 beta/metabolismo , Mediadores da Inflamação/metabolismo , Microglia/efeitos dos fármacos , Microglia/metabolismo , Microglia/patologia , Emaranhados Neurofibrilares/efeitos dos fármacos , Emaranhados Neurofibrilares/metabolismo , Emaranhados Neurofibrilares/patologia , Fragmentos de Peptídeos/metabolismo , Fosforilação , Transdução de Sinais , Secagem por Atomização , Sus scrofa , Proteínas tau/metabolismo
2.
Int J Mol Sci ; 21(18)2020 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-32942624

RESUMO

Dietary supplementation with spray-dried porcine plasma (SDP) can modulate the immune response of gut-associated lymphoid tissue. SDP supplementation reduces acute mucosal inflammation, as well as chronic inflammation associated with aging. The aim of this study was to analyze if SDP supplementation could ameliorate colitis in a genetic mouse model of inflammatory bowel disease (IBD). Wild-type mice and Mdr1a knockout (KO) mice were administered a control diet or an SDP-supplemented diet from day 21 (weaning) until day 56. The histopathological index, epithelial barrier, and intestinal immune system were analyzed in the colonic mucosa. KO mice had higher epithelial permeability, increased Muc1 and Muc4 expression, and lower abundance of E-cadherin and Muc2 (all p < 0.001). SDP prevented these effects (all p < 0.05) and decreased the colonic inflammation observed in KO mice, reducing neutrophil and monocyte infiltration and activation and the percentage of activated T helper lymphocytes in the colonic mucosa (all p < 0.05). SDP also diminished proinflammatory cytokine expression and increased the anti-inflammatory IL-10 concentration in the colonic mucosa (all p < 0.05). In conclusion, dietary supplementation with SDP enhances colon barrier function and reduces mucosal inflammation in a mouse model of IBD.


Assuntos
Proteínas Sanguíneas/farmacologia , Colo/efeitos dos fármacos , Inflamação/tratamento farmacológico , Doenças Inflamatórias Intestinais/tratamento farmacológico , Plasma/metabolismo , Suínos/metabolismo , Animais , Colite/tratamento farmacológico , Colite/metabolismo , Colo/metabolismo , Citocinas/metabolismo , Dieta , Suplementos Nutricionais , Modelos Animais de Doenças , Imunidade nas Mucosas/efeitos dos fármacos , Doenças Inflamatórias Intestinais/metabolismo , Mucosa Intestinal/efeitos dos fármacos , Mucosa Intestinal/metabolismo , Camundongos , Camundongos Knockout
3.
Mol Nutr Food Res ; 62(4)2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29266852

RESUMO

SCOPE: Obesity is a fibroblast growth factor 21 (FGF21)-resistant state. Since FGF21 production and signaling are regulated by some bioactive dietary compounds, we analyze the impact of Mediterranean tomato-based sofrito sauce on: (i) the FGF21 expression and signaling in visceral white adipose tissue (vWAT), and (ii) the insulin sensitivity of obese Zucker rats (OZR). METHODS AND RESULTS: OZR are fed with a sofrito-supplemented diet or control diet. Insulin sensitivity and FGF21 signaling are determined. We observed that sofrito is able to improve the responsiveness to both hormones in obese rats. Sofrito-supplemented diet increases FGF21 signaling in vWAT by inducing the expression of the FGF receptors (FGFR1 and FGFR4) that promotes the expression of canonical target genes, like Egr-1, c-Fos and uncoupling protein 1 (Ucp1). CONCLUSIONS: A sofrito-supplemented diet improves insulin and FGF21 sensitivity in OZR, explaining part of sofrito's healthy effects on glucose metabolism. In addition, induction of UCP1 and the unchanged body weight despite the hyperphagic behavior of the sofrito-fed rats suggests that the increase in FGF21 signaling correlates with an increase in energy expenditure (EE). Further studies in humans may help to understand whether sofrito consumption increases the EE in obese individuals.


Assuntos
Tecido Adiposo Branco/metabolismo , Dieta Mediterrânea , Fatores de Crescimento de Fibroblastos/fisiologia , Lycopersicon esculentum , Obesidade/metabolismo , Transdução de Sinais/fisiologia , Animais , Metabolismo Energético , Fatores de Crescimento de Fibroblastos/sangue , Resistência à Insulina , Masculino , Ratos , Ratos Zucker
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