RESUMO
Nonalcoholic fatty liver disease (NAFLD) and type 2 Diabetes Mellitus (T2DM) are highly prevalent diseases and are closely associated, with NAFLD being present in the majority of T2DM patients. In Asian traditional medicine, Mori Cortex is widely used for the treatment of diabetes and hyperlipidemia. However, whether it has a therapeutic effect on T2DM associated with NAFLD is still unknown. The present study showed that the oral treatment with Mori Cortex extract (MCE; 10 g·kg·d) lowered the blood lipid levels and reversed insulin resistance (IR) in high fat-diet/streptozotocin-induced type 2 diabetes in rats. The expression levels of sterol receptor element-binding protein-1c (SREBP-1c) and carbohydrate-responsive element binding protein (ChREBP), which are involved in steatosis in NAFLD rats, were measured in the liver samples. MCE decreased the protein and mRNA expression levels of SREBP-1c and ChREBP. In conclusion, down-regulation of SREBP-1c and ChREBP might contribute to the protective effect of MCE on hepatic injury and IR in the rats with T2DM associated with NAFLD.
Assuntos
Animais , Masculino , Ratos , Alanina Transaminase , Sangue , Aspartato Aminotransferases , Sangue , Fatores de Transcrição de Zíper de Leucina e Hélice-Alça-Hélix Básicos , Genética , Diabetes Mellitus Tipo 2 , Sangue , Tratamento Farmacológico , Metabolismo , Dieta Hiperlipídica , Modelos Animais de Doenças , Regulação para Baixo , Insulina , Sangue , Resistência à Insulina , Fisiologia , Metabolismo dos Lipídeos , Genética , Fígado , Morus , Hepatopatia Gordurosa não Alcoólica , Sangue , Tratamento Farmacológico , Metabolismo , Fitoterapia , Extratos Vegetais , Farmacologia , Usos Terapêuticos , Ratos Sprague-Dawley , EstreptozocinaRESUMO
Nonalcoholic fatty liver disease (NAFLD) and type 2 Diabetes Mellitus (T2DM) are highly prevalent diseases and are closely associated, with NAFLD being present in the majority of T2DM patients. In Asian traditional medicine, Mori Cortex is widely used for the treatment of diabetes and hyperlipidemia. However, whether it has a therapeutic effect on T2DM associated with NAFLD is still unknown. The present study showed that the oral treatment with Mori Cortex extract (MCE; 10 g·kg·d) lowered the blood lipid levels and reversed insulin resistance (IR) in high fat-diet/streptozotocin-induced type 2 diabetes in rats. The expression levels of sterol receptor element-binding protein-1c (SREBP-1c) and carbohydrate-responsive element binding protein (ChREBP), which are involved in steatosis in NAFLD rats, were measured in the liver samples. MCE decreased the protein and mRNA expression levels of SREBP-1c and ChREBP. In conclusion, down-regulation of SREBP-1c and ChREBP might contribute to the protective effect of MCE on hepatic injury and IR in the rats with T2DM associated with NAFLD.
Assuntos
Animais , Masculino , Ratos , Alanina Transaminase , Sangue , Aspartato Aminotransferases , Sangue , Fatores de Transcrição de Zíper de Leucina e Hélice-Alça-Hélix Básicos , Genética , Diabetes Mellitus Tipo 2 , Sangue , Tratamento Farmacológico , Metabolismo , Dieta Hiperlipídica , Modelos Animais de Doenças , Regulação para Baixo , Insulina , Sangue , Resistência à Insulina , Fisiologia , Metabolismo dos Lipídeos , Genética , Fígado , Morus , Hepatopatia Gordurosa não Alcoólica , Sangue , Tratamento Farmacológico , Metabolismo , Fitoterapia , Extratos Vegetais , Farmacologia , Usos Terapêuticos , Ratos Sprague-Dawley , EstreptozocinaRESUMO
·Accompanied with the rapid progress of materials technology and tissue engineering science, the increasing number of materials of organic polymer structure, especially nano-materials were highlighted by researchers in the field of biomedicine. Caused by some certain kinds of features, their excellent biocompatibility and security secondary to material size, surface modification, new materials were playing unique roles in drug delivery system, controlled release unit, disease detection etc. It provides a novel approach to diseases therapy. The application of new materials regarding organic polymer to ophthalmic drug therapy were focused in the review.
RESUMO
The survey aimed to explore the association of liver transaminases with the prevalence of type 2 diabetes mellitus (T2DM) and pre-diabetes (pre-DM) in the middle-aged rural population in China. A cross-sectional study was conducted in 10 800 middle-aged subjects who lived in rural area of central China. The 75-g oral glucose-tolerance test (OGTT) was performed. Participants were asked to complete physical examination and standard questionnaire. The serum liver transaminases (ALT and GGT), HbA1C and serum lipids were measured. In middle-aged rural population, the prevalence of impaired fasting glucose (IFG), impaired glucose tolerance (IGT), impaired fasting glucose combined with impaired glucose tolerance (IFG+IGT) and DM was 4.0%, 11.8%, 2.6% and 10.0%, respectively. Some measurements were higher in males than in females, such as waist hip ratio (WHR), blood pressure, fasting blood glucose (FBG), high density lipoprotein-cholesterol (HDL-C), and liver enzymes (ALT and GGT). Further, we found that elevated serum GGT and ALT levels were significantly positively correlated with the prevalence of DM, independent of central obesity, serum lipid and insulin resistance (IR) in both genders. However, the correlation of GGT and ALT with pre-DM was determined by genders and characteristics of liver enzymes. Higher serum GGT was indicative of IGT in both genders. The association of serum ALT with pre-DM was significant only in female IGT group. In conclusion, our present survey shows both serum GGT and ALT are positively associated with DM, independent of the cardiovascular risk factors in both genders.
RESUMO
The survey aimed to explore the association of liver transaminases with the prevalence of type 2 diabetes mellitus (T2DM) and pre-diabetes (pre-DM) in the middle-aged rural population in China. A cross-sectional study was conducted in 10 800 middle-aged subjects who lived in rural area of central China. The 75-g oral glucose-tolerance test (OGTT) was performed. Participants were asked to complete physical examination and standard questionnaire. The serum liver transaminases (ALT and GGT), HbA1C and serum lipids were measured. In middle-aged rural population, the prevalence of impaired fasting glucose (IFG), impaired glucose tolerance (IGT), impaired fasting glucose combined with impaired glucose tolerance (IFG+IGT) and DM was 4.0%, 11.8%, 2.6% and 10.0%, respectively. Some measurements were higher in males than in females, such as waist hip ratio (WHR), blood pressure, fasting blood glucose (FBG), high density lipoprotein-cholesterol (HDL-C), and liver enzymes (ALT and GGT). Further, we found that elevated serum GGT and ALT levels were significantly positively correlated with the prevalence of DM, independent of central obesity, serum lipid and insulin resistance (IR) in both genders. However, the correlation of GGT and ALT with pre-DM was determined by genders and characteristics of liver enzymes. Higher serum GGT was indicative of IGT in both genders. The association of serum ALT with pre-DM was significant only in female IGT group. In conclusion, our present survey shows both serum GGT and ALT are positively associated with DM, independent of the cardiovascular risk factors in both genders.
Assuntos
Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores Etários , Alanina Transaminase , Sangue , Glicemia , Metabolismo , Pressão Sanguínea , China , HDL-Colesterol , Sangue , Hemoglobinas Glicadas , Metabolismo , Estado Pré-Diabético , Sangue , Epidemiologia , População Rural , gama-Glutamiltransferase , SangueRESUMO
<p><b>BACKGROUND</b>Neural stem cells (NSCs) transplantation and gene therapy have been widely investigated for treating the cerebullar and myelonic injuries, however, studies on the ophthalmology are rare. The aim of this study was to investigate the migration and differentiation of brain-derived neurotrophic factor (BDNF) gene transgenic NSCs transplanted into the normal rat retinas.</p><p><b>METHODS</b>NSCs were cultured and purified in vitro and infected with recombinant retrovirus pLXSN-BDNF and pLXSN respectively, to obtain the BDNF overexpressed NSCs (BDNF-NSCs) and control cells (p-NSCs). The expression of BDNF genes in two transgenic NSCs and untreated NSCs were measured by fluorescent quantitative polymerase chain reaction (FQ-PCR) and enzyme-linked immunosorbent assay (ELISA). BDNF-NSCs and NSCs were infected with adeno-associated viruses-enhanced green fluorescent protein (AAV-EGFP) to track them in vivo and served as donor cells for transplantation into the subretinal space of normal rat retinas, phosphated buffer solution (PBS) served as pseudo transplantation for a negative control. Survival, migration, and differentiation of donor cells in host retinas were observed and analyzed with Heidelberg retina angiograph (HRA) and immunohistochemistry, respectively.</p><p><b>RESULTS</b>NSCs were purified successfully by limiting dilution assay. The expression of BDNF gene in BDNF-NSCs was the highest among three groups both at mRNA level tested by FQ-PCR (P < 0.05) and at protein level measured by ELISA (P < 0.05), which showed that BDNF was overexpressed in BDNF-NSCs. The results of HRA demonstrated that graft cells could survive well and migrate into the host retinas, while the immunohistochemical analysis revealed that transplanted BDNF-NSCs differentiated into neuron more efficiently compared with the control NSCs 2 months after transplantation.</p><p><b>CONCLUSIONS</b>The seed cells of NSCs highly secreting BDNF were established. BDNF can promote NSCs to migrate and differentiate into neural cells in the normal host retinas.</p>