RESUMO
Dysregulation of adipocyte differentiation and dysfunction play key roles in the pathogenesis of obesity and associated disorders such as diabetes and metabolic syndrome, and as such, a better understanding of the molecular mechanism of adipogenesis may help to elucidate the pathological condition of obesity and its associated disorders. Regucalcin (RGN) plays multiple regulatory roles in intracellular Ca2+ signaling pathways in mammalian cells. Here, we report that overexpression of RGN enhances lipid accumulation in 3T3-L1 adipocyte cells after adipogenic stimulation, accompanied by upregulation of adipocyte differentiation marker proteins. In contrast, genetic disruption of RGN inhibited adipogenic stimulation-induced differentiation of 3T3-L1 cells. Furthermore, RGN overexpression in differentiated 3T3-L1 adipocytes blocked inflammatory crosstalk between 3T3-L1 adipocytes and RAW264.7 macrophages in a transwell coculture system. Knockdown of RGN expression in cocultured 3T3-L1 adipocytes enhanced their susceptibility to RAW264.7 macrophage-mediated inflammation. These results suggest that RGN is required for 3T3-L1 adipocyte differentiation and that it exerts anti-inflammatory activity against 3T3-L1 adipocyte inflammation after coculture with RAW264.7 macrophages. Thus, RGN may be a novel regulator of adipocyte differentiation and act as a suppressor of inflammation in macrophage-infiltrated adipocyte tissue.
Assuntos
Adipócitos/metabolismo , Proteínas de Ligação ao Cálcio/metabolismo , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Células 3T3-L1 , Adipócitos/citologia , Adipócitos/fisiologia , Adipogenia/genética , Adipogenia/fisiologia , Animais , Proteínas de Ligação ao Cálcio/fisiologia , Diferenciação Celular/fisiologia , Linhagem Celular , Técnicas de Cocultura , Inflamação/metabolismo , Peptídeos e Proteínas de Sinalização Intracelular/fisiologia , Macrófagos/metabolismo , Camundongos , Obesidade/metabolismo , Células RAW 264.7 , Transdução de Sinais/efeitos dos fármacosRESUMO
Purpose: To determine how nurses perceive the need for advance care planning (ACP) for chronic heart failure with patients and their families. Methods: A questionnaire survey was administered with 427 nurses who were affiliated with implantable cardioverter-defibrillators and resynchronization therapy. The survey included 13 items related to the need for ACP for simulated advanced heart failure cases with patients and their families. Results: Valid Responses were obtained from 207 nurses. On out of all items, the least proprtion of participants (51%) responded “giving predictions about functional prognosis and life expectancy” should be performed with patients. The participants’ perceptions regarding 8 items, which included the items on communication about prognosis, reflected their belief that ACP should be performed with family members rather than the patient. It was found that participants with certification in chronic heart failure nursing were more likely to respond in favor of ACP being performed with the patients in relation to 7 items, which included “ask about what has been important in one’s life”, and being performed with the family in relation to 10 items that included “ask the family what kind of life you want the patient to have hereafter”, as compared to other nurses. Conclusion: Regarding ACP, it is suggested that nurses are careful in discussing prognosis with patients, and certified nurses tend to attach importance to the individualities and values of patients and their families.
