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Mol Biol Rep ; 48(5): 4591-4600, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-34125331

RESUMO

Our previous study showed that soy milks could contain high levels of active soybean trypsin inhibitors (SBTI) if they were not properly processed. This study investigated the effects of consuming active SBTI on pancreatic weights, histology, trypsinogen production and expression of STAT3, receptors for androgen (AR) and estrogen (ER) in pancreas, liver and uterus of rats. Weanling Sprague-Dawley rats were randomly divided into 3 groups (8 females and 8 males/group) and fed diets containing either 20% casein protein (Casein) or 20% soy protein (SP) in the presence of high (1.42 BAEE unit/µg, SP + SBTI) or low (0.2 BAEE unit/µg, SP-SBTI) levels of active SBTI for 8 weeks. Ingestion of SP + SBTI diet markedly increased pancreatic weights and trypsinogen content (p < 0.01), and caused acinar cell hypertrophy, and reduced pancreatic STAT3, p-STAT3, AR and ERß content, and increased uterine ERα and ERß compared to the Casein or SP-SBTI diets (p < 0.05). The two SP-containing diets lowered hepatic STAT3, p-STAT3, and pancreatic ERα, and increased hepatic ERα and ERß content in the female rats compared to the Casein diet (p < 0.05). This study demonstrated for the first time that consumption of high level of active SBTI not only increased pancreatic weights and acinar cell secretions, but also attenuated the expression of pancreatic STAT3, p-STAT3, AR, and ERß proteins in both sexes and increased uterine ERα and ERß content, and that dietary soy protein affected hepatic STAT3, p-STAT3, ERα and ERß in a gender-dependent manner.


Assuntos
Receptor alfa de Estrogênio/genética , Receptor beta de Estrogênio/genética , Pâncreas/metabolismo , Fator de Transcrição STAT3/genética , Inibidores da Tripsina/farmacologia , Animais , Estrogênios/genética , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Fígado , Masculino , Pâncreas/efeitos dos fármacos , Ratos , Receptores Androgênicos/genética , Proteínas de Soja/genética , Proteínas de Soja/farmacologia , Distribuição Tecidual/efeitos dos fármacos , Distribuição Tecidual/genética , Pesos e Medidas/normas
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