Type 1 diabetes(T1D)is a chronic autoimmune condition that destroys insulinproducing beta cells in the pancreas,leading to insulin deficiency and hyperglycemia.The management of T1D primarily focuses on exogenous insu...Type 1 diabetes(T1D)is a chronic autoimmune condition that destroys insulinproducing beta cells in the pancreas,leading to insulin deficiency and hyperglycemia.The management of T1D primarily focuses on exogenous insulin replacement to control blood glucose levels.However,this approach does not address the underlying autoimmune process or prevent the progressive loss of beta cells.Recent research has explored the potential of glucagon-like peptide-1 receptor agonists(GLP-1RAs)as a novel intervention to modify the disease course and delay the onset of T1D.GLP-1RAs are medications initially developed for treating type 2 diabetes.They exert their effects by enhancing glucose-dependent insulin secretion,suppressing glucagon secretion,and slowing gastric emptying.Emerging evidence suggests that GLP-1RAs may also benefit the treatment of newly diagnosed patients with T1D.This article aims to highlight the potential of GLP-1RAs as an intervention to delay the onset of T1D,possibly through their potential immunomodulatory and anti-inflammatory effects and preservation of beta-cells.This article aims to explore the potential of shifting the paradigm of T1D management from reactive insulin replacement to proactive disease modification,which should open new avenues for preventing and treating T1D,improving the quality of life and long-term outcomes for individuals at risk of T1D.展开更多
Objective Interferon-γ （IFN-γ） plays an important role in apoptosis and was shown to increase the riskof diabetes. Visfatin, an adipokine, has anti-diabetic, anti-tumor, and regulating inflammatoryproperties. In t...Objective Interferon-γ （IFN-γ） plays an important role in apoptosis and was shown to increase the riskof diabetes. Visfatin, an adipokine, has anti-diabetic, anti-tumor, and regulating inflammatoryproperties. In this study we investigated the effect of visfatin on IFN-γ-induced apoptosis in ratpancreatic β-cells.Methods The RINm5F （rat insulinoma cell line） cells exposed to IFN-γ were treated with or withoutvisfatin. The viability and apoptosis of the cells were assessed by using MTT and flow cytometry. Theexpressions of mRNA and protein were detected by using real-time PCR and western blot analysis.Results The exposure of RINm5F cells to IFN-γ for 48 h led to increased apoptosis percentage of thecells. Visfatin pretreatment significantly increased the cell viability and reduced the cell apoptosisinduced by IFN-γ. IFN-γ-induced increase in expression of p53 mRNA and cytochrome c protein,decrease in mRNA and protein levels of anti-apoptotic protein Bcl-2 were attenuated by visfatinpretreatment. Visfatin also increased AMPK and ERK1/2 phosphorylation and the anti-apoptotic actionof visfatin was attenuated by the AMPK and ERK1/2 inhibitor.Conclusion These results suggested that visfatin protected pancreatic islet cells against IFN-γ-inducedapoptosis via mitochondria-dependent apoptotic pathway. The anti-apoptotic action of visfatin ismediated by activation of AMPK and ERK1/2 signaling molecules.展开更多
目的:探讨电转法沉默ATP结合盒转运子E1(ATP-binding cassette protein E1,ABCE1)基因的表达对人食管癌EC109细胞凋亡、增殖、侵袭及迁移的影响。方法:合成靶向ABCE1的siRNA序列(ABCE1-siRNA)以及阴性对照序列(NCsiRNA),电转法转染至EC...目的:探讨电转法沉默ATP结合盒转运子E1(ATP-binding cassette protein E1,ABCE1)基因的表达对人食管癌EC109细胞凋亡、增殖、侵袭及迁移的影响。方法:合成靶向ABCE1的siRNA序列(ABCE1-siRNA)以及阴性对照序列(NCsiRNA),电转法转染至EC109细胞,分别形成ABCE1-EC109、NC-siRNA-EC109细胞。RT-PCR、Western blotting检测转染后EC109细胞中ABCE1 mRNA与蛋白的表达情况,流式细胞术检测EC109细胞周期及凋亡,CCK-8法、划痕愈合实验、Transwell法分别检测EC109细胞的增殖、迁移以及侵袭的能力。结果:ABCE1-EC109细胞中ABCE1 mRNA和蛋白表达较NC-siRNAEC109细胞明显降低[(0.47±0.04)vs(0.67±0.05),(0.63±0.09)vs(0.86±0.11);均P<0.05]。与NC-siRNA-EC109细胞相比,ABCE1-EC109细胞的增殖速度明显减慢[(2.20±0.10)vs(2.91±0.13),P<0.05],细胞周期阻滞在G0/G1期细胞数目明显增多[(76.5±3.1)%vs(56.1±2.7)%,P<0.05)];细胞的凋亡率明显升高[(15.46±3.12)%vs(0.54±0.24)%,P<0.01],迁移、侵袭能力均显著下降[迁移:(8.12±0.23)vs(1.91±0.11)μm,P<0.05;侵袭:(42.56±4.68)vs(68.78±6.98)个,P<0.01]。结论:电转法沉默ABCE1基因的表达可促进食管癌EC109细胞的凋亡,抑制其体外增殖、侵袭及迁移。展开更多
文摘Type 1 diabetes(T1D)is a chronic autoimmune condition that destroys insulinproducing beta cells in the pancreas,leading to insulin deficiency and hyperglycemia.The management of T1D primarily focuses on exogenous insulin replacement to control blood glucose levels.However,this approach does not address the underlying autoimmune process or prevent the progressive loss of beta cells.Recent research has explored the potential of glucagon-like peptide-1 receptor agonists(GLP-1RAs)as a novel intervention to modify the disease course and delay the onset of T1D.GLP-1RAs are medications initially developed for treating type 2 diabetes.They exert their effects by enhancing glucose-dependent insulin secretion,suppressing glucagon secretion,and slowing gastric emptying.Emerging evidence suggests that GLP-1RAs may also benefit the treatment of newly diagnosed patients with T1D.This article aims to highlight the potential of GLP-1RAs as an intervention to delay the onset of T1D,possibly through their potential immunomodulatory and anti-inflammatory effects and preservation of beta-cells.This article aims to explore the potential of shifting the paradigm of T1D management from reactive insulin replacement to proactive disease modification,which should open new avenues for preventing and treating T1D,improving the quality of life and long-term outcomes for individuals at risk of T1D.
基金supported by grants from the National Natural Science Foundation of China(Nos.81100763 and 81270158)Research Fund for Doctoral Programs of Higher Education(20120001110009)
文摘Objective Interferon-γ （IFN-γ） plays an important role in apoptosis and was shown to increase the riskof diabetes. Visfatin, an adipokine, has anti-diabetic, anti-tumor, and regulating inflammatoryproperties. In this study we investigated the effect of visfatin on IFN-γ-induced apoptosis in ratpancreatic β-cells.Methods The RINm5F （rat insulinoma cell line） cells exposed to IFN-γ were treated with or withoutvisfatin. The viability and apoptosis of the cells were assessed by using MTT and flow cytometry. Theexpressions of mRNA and protein were detected by using real-time PCR and western blot analysis.Results The exposure of RINm5F cells to IFN-γ for 48 h led to increased apoptosis percentage of thecells. Visfatin pretreatment significantly increased the cell viability and reduced the cell apoptosisinduced by IFN-γ. IFN-γ-induced increase in expression of p53 mRNA and cytochrome c protein,decrease in mRNA and protein levels of anti-apoptotic protein Bcl-2 were attenuated by visfatinpretreatment. Visfatin also increased AMPK and ERK1/2 phosphorylation and the anti-apoptotic actionof visfatin was attenuated by the AMPK and ERK1/2 inhibitor.Conclusion These results suggested that visfatin protected pancreatic islet cells against IFN-γ-inducedapoptosis via mitochondria-dependent apoptotic pathway. The anti-apoptotic action of visfatin ismediated by activation of AMPK and ERK1/2 signaling molecules.
