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1.
J Insect Sci ; 20(1)2020 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-32061083

RESUMO

Plant tannins, polyphenolic plant secondary metabolites are involved in important chemical defense processes in plants. In this study, tannic acid was used as the standard of plant tannins to determine the effects on nutritional indices and activities of glutathione S-transferases (GSTs), cytochrome P450 monooxygenase (CYP450), carboxylesterase (CarE), and acetylcholinesterase (AChE) in fourth-instar larvae of Hyphantria cunea (Drury) by feeding on an artificial diet containing tannic acid under different treatments. We found that tannic acid significantly affected the digestive capacity and food utilization rate of H. cunea larvae. A tannic acid concentration of less than 2.0% promoted feeding and the utilization of undesirable food by H. cunea larvae, while inhibitory effects were observed at high concentrations (>2.5%). Tannic acid had a significant effect on the activity of detoxification enzymes and AChE in H. cunea larvae in concentration-dependent and time-dependent manners (P < 0.05). These results provide new insights into the potential mechanisms underlying detoxification in H. cunea larvae against tannic acid in host plants.

3.
Exp Dermatol ; 27(11): 1201-1209, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30066343

RESUMO

Renal 25-hydroxyvitamin D-1α-hydroxylase (1αOHase, CYP27B1) and 24-hydroxylase (24OHase, CYP24A1) are tightly regulated. However, little is known about the regulation of 1α(OH)ase and 24(OH)ase in extrarenal tissue such as the epidermis. This study was to determine the roles of parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF 23) in the regulation of 1α(OH)ase and 24(OH)ase in epidermal keratinocytes as well as epidermal keratinocyte proliferation and differentiation. The results showed that PTH increased the protein level of 1α(OH)ase in human epidermal keratinocyte cell line HaCaT, but had no effect on the level of 24(OH)ase. The effect of PTH on 1α(OH)ase was blocked by the PKC inhibitor. Treatment with FGF23 decreased mRNA and protein levels of 1α(OH)ase and increased mRNA and protein levels of 24(OH)ase in HaCaT cells. The effect of FGF23 on 1α(OH)ase and 24(OH)ase was blocked by the mitogen-activated protein kinase/extracellular regulated protein kinase (MAPK/ERK) inhibitor. In addition, treatment with PTH enhanced levels of differentiation markers including keratin 1, involucrin, loricrin, and filaggrin but reduced levels of BrdU incorporation in HaCaT cells. These effects were inhibited by the PKC inhibitor. FGF23 enhanced proliferation of HaCaT cells, but reduced levels of early differentiation markers including keratin 1 and involucrin and enhanced levels of the later differentiation markers including loricrin and filaggrin. These results suggest that PTH stimulates 1α(OH)ase expression and differentiation of HaCaT cells and inhibits proliferation via PKC. The data also suggest that FGF23 inhibits 1α(OH)ase expression and stimulates 24(OH)ase expression via MAPK/ERK. In addition, FGF23 enhances proliferation and late differentiation and inhibits early differentiation of HaCaT keratinocytes.


Assuntos
25-Hidroxivitamina D3 1-alfa-Hidroxilase/metabolismo , Epiderme/enzimologia , Fatores de Crescimento de Fibroblastos/farmacologia , Queratinócitos/enzimologia , Hormônio Paratireóideo/farmacologia , Inibidores de Proteínas Quinases/farmacologia , Vitamina D3 24-Hidroxilase/metabolismo , 25-Hidroxivitamina D3 1-alfa-Hidroxilase/genética , Diferenciação Celular/efeitos dos fármacos , Linhagem Celular , Proliferação de Células/efeitos dos fármacos , Epiderme/metabolismo , MAP Quinases Reguladas por Sinal Extracelular/antagonistas & inibidores , Glucuronidase/metabolismo , Humanos , Indóis/farmacologia , Queratinócitos/metabolismo , Maleimidas/farmacologia , Proteína Quinase C/antagonistas & inibidores , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/metabolismo , Receptor Tipo 2 de Fator de Crescimento de Fibroblastos/metabolismo , Receptor Tipo 3 de Fator de Crescimento de Fibroblastos/metabolismo , Receptor Tipo 4 de Fator de Crescimento de Fibroblastos/metabolismo , Receptor Tipo 1 de Hormônio Paratireóideo/metabolismo , Transdução de Sinais , Vitamina D3 24-Hidroxilase/genética
4.
J Obstet Gynaecol Res ; 44(11): 2115-2118, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30051551

RESUMO

Ovarian cysts are one of the most common gynecologic affections for females. The most effective therapy is surgery, but not for all conditions. An 18-year-old woman was referred to our hospital because of menstruation disorder and abdominal distension. Ultrasound and computer tomography of the abdomen revealed a giant ovarian cyst. Magnetic resonance imaging revealed profound pituitary enlargement. Laboratory studies showed severe hypothyroidism, mild anemia, hyperlipidemia, hyperprolactinemia and an elevated level of cancer antigen-125. Regression of the giant ovarian cyst and pituitary enlargement was observed after a 5-month levothyroxine replacement therapy. Thus, for patients with ovarian cysts, hypothyroidism should be taken into account. Making correct diagnosis would avoid unnecessary surgery.


Assuntos
Hipotireoidismo/tratamento farmacológico , Cistos Ovarianos/tratamento farmacológico , Tiroxina/farmacologia , Adolescente , Feminino , Humanos , Tiroxina/administração & dosagem
5.
Dev Neuropsychol ; 42(3): 231-240, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28467119

RESUMO

The polymorphism of ERK and PTPRR in MDD is rarely reported. The present study investigated the association between the polymorphism of ERK/PTPRR and MDD at resting-state brain function using genomic imaging. It indicated that the amplitude of low-frequency fluctuation (ALFF) and regional homogeneity (ReHo) in functional magnetic resonance imaging (fMRI) changed significantly in various brain regions of MDD patients. The T/G allele of ERK-rs1267842 and G/C allele of PTPRR-rs1513105 showed abnormal ALFF and ReHo changes in cortex including superior frontal gyrus and middle temporal gyrus. The development of MDD may be related with the polymorphism of ERK-rs12678428 and PTPRR-rs1513105.


Assuntos
Encéfalo/fisiopatologia , Transtorno Depressivo Maior/genética , Sistema de Sinalização das MAP Quinases/genética , Proteínas Tirosina Fosfatases Classe 7 Semelhantes a Receptores/genética , Adolescente , Adulto , Encéfalo/diagnóstico por imagem , Mapeamento Encefálico , Estudos de Casos e Controles , Transtorno Depressivo Maior/diagnóstico por imagem , Transtorno Depressivo Maior/fisiopatologia , Feminino , Humanos , Imagem por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Polimorfismo Genético , Adulto Jovem
6.
Biomed Res Int ; 2016: 3062765, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27340655

RESUMO

Extracellular calcium is a major regulator of keratinocyte differentiation in vitro and appears to play that role in vivo, but the mechanism is unclear. We have previously demonstrated that, following calcium stimulation, PIP5K1α is recruited by the E-cadherin-ß-catenin complex to the plasma membrane where it provides the substrate PIP2 for both PI3K and PLC-γ1. This signaling pathway is critical for calcium-induced generation of second messengers including IP3 and intracellular calcium and keratinocyte differentiation. In this study, we explored the upstream regulatory mechanism by which calcium activates PIP5K1α and the role of this activation in calcium-induced keratinocyte differentiation. We found that treatment of human keratinocytes in culture with calcium resulted in an increase in serine dephosphorylation and PIP5K1α activation. PP1 knockdown blocked extracellular calcium-induced increase in serine dephosphorylation and activity of PIP5K1α and induction of keratinocyte differentiation markers. Knockdown of PLC-γ1, the downstream effector of PIP5K1α, blocked upstream dephosphorylation and PIP5K1α activation induced by calcium. Coimmunoprecipitation revealed calcium induced recruitment of PP1 to the E-cadherin-catenin-PIP5K1α complex in the plasma membrane. These results indicate that PP1 is recruited to the extracellular calcium-dependent E-cadherin-catenin-PIP5K1α complex in the plasma membrane to activate PIP5K1α, which is required for PLC-γ1 activation leading to keratinocyte differentiation.


Assuntos
Diferenciação Celular/genética , Fosfolipase C gama/genética , Fosfotransferases (Aceptor do Grupo Álcool)/genética , Proteína Fosfatase 1/genética , Receptores de Neuropeptídeo Y/genética , Caderinas/genética , Cálcio/metabolismo , Cálcio/farmacologia , Células Cultivadas , Regulação da Expressão Gênica no Desenvolvimento/efeitos dos fármacos , Técnicas de Silenciamento de Genes , Humanos , Queratinócitos/efeitos dos fármacos , Queratinócitos/metabolismo , Fosfolipase C gama/metabolismo , Fosfotransferases (Aceptor do Grupo Álcool)/biossíntese , Proteína Fosfatase 1/metabolismo , Receptores de Neuropeptídeo Y/metabolismo , Transdução de Sinais/efeitos dos fármacos , beta Catenina/genética
7.
J Clin Biochem Nutr ; 58(3): 186-92, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-27257343

RESUMO

Although immunoassays in measuring 25-hydroxyvitamin D [25(OH)D] have been improved recently, relatively large differences are still seen between results of 25(OH)D measured by immunoassays and by liquid chromatography-tandem mass spectrometry (LC-MS/MS). In the present studies, we compared two immunoassays with LC-MS/MS for measuring 25(OH)D concentrations. Concentrations of 25-hydroxyvitamin D2 [25(OH)D2] and 25-hydroxyvitamin D3 [25(OH)D3] in serum samples from 59 healthy subjects were measured by two immunoassays including Siemens ADVIA Centaur Vitamin D Total (Centaur) and Roche Elecsys Vitamin D Total (Elecsys) and LC-MS/MS. To determine the cross reactivity of Elecsys and Centaur toward 25(OH)D2, a dosage of 200,000 IU vitamin D2 was given after first sampling. Serum samples were obtained 30 days later and concentrations of 25(OH)D2 and 25(OH)D3 were measured again. The results showed poor agreement between the immunoassays and LC-MS/MS in 25(OH)D2 and 25(OH)D3 measurements. The percentage of 25(OH)D2 cross-reactivity was 45.3% for Centaur and 41.2% for Elecsys and there was no significant difference between Centaur and Elecsys. In conclusion, Centaur and Elecsys perform unsatisfactorily in measuring 25(OH)D levels, especially for 25(OH)D2 cross-reactivity. Therefore, clinicians need to be aware of the underestimation of vitamin D status when using these immunoassays for measuring individuals supplemented with vitamin D2.

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