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Diabetic polyneuropathy, sensory neurons, nuclear structure and spliceosome alterations: a role for CWC22 RESEARCH ARTICLE
ABSTRACT Unique deficits in the function of adult sensory neurons as part of their early neurodegeneration might account for progressive polyneuropathy during chronic diabetes mellitus. Here, we provide structural and functional evidence for aberrant pre-mRNA splicing in a chronic type 1 model of experimental diabetic polyneuropathy (DPN). Cajal bodies (CBs), unique nuclear substructures involved in RNA splicing, increased in number in diabetic sensory neurons, but their expected colocalization with survival motor neuron (SMN) proteins was reduced – a mislocalization described in motor neurons of spinal muscular atro...
Source: DMM Disease Models and Mechanisms - February 28, 2017 Category: Biomedical Science Authors: Kobayashi, M., Chandrasekhar, A., Cheng, C., Martinez, J. A., Ng, H., de la Hoz, C., Zochodne, D. W. Tags: Metabolic Disorders RESEARCH ARTICLE Source Type: research

Atorvastatin Alleviates Experimental Diabetic Cardiomyopathy by Regulating the GSK-3 β-PP2Ac-NF-κB Signaling Axis
by Xiao-min Ren, Guang-feng Zuo, Wen Wu, Jie Luo, Peng Ye, Shao-liang Chen, Zuo-ying Hu Recent studies reported that atorvastatin (ATOR) alleviated progression of experimental diabetic cardiomyopathy (DCM), possibly by protecting against apoptosis. However, the underlying mechanisms of this protective effect remain unclear. Therefore, our study investigated the role of the glycogen s ynthase kinase (GSK)-3β-protein phosphatase 2A(PP2A)-NF-κB signaling pathway in the anti-apoptotic and cardioprotective effects of ATOR on cardiomyocytes cultured in high glucose (HG) and in DCM. Our results showed that, in HG-cultured card...
Source: PLoS One - November 15, 2016 Category: Biomedical Science Authors: Xiao-min Ren Source Type: research

PKCδ inhibition normalizes the wound-healing capacity of diabetic human fibroblasts
Abnormal fibroblast function underlies poor wound healing in patients with diabetes; however, the mechanisms that impair wound healing are poorly defined. Here, we evaluated fibroblasts from individuals who had type 1 diabetes (T1D) for 50 years or more (Medalists, n = 26) and from age-matched controls (n = 7). Compared with those from controls, Medalist fibroblasts demonstrated a reduced migration response to insulin, lower VEGF expression, and less phosphorylated AKT (p-AKT), but not p-ERK, activation. Medalist fibroblasts were also functionally less effective at wound closure in nude mice. Activation of the δ isoform o...
Source: Journal of Clinical Investigation - January 26, 2016 Category: Biomedical Science Authors: Mogher Khamaisi, Sayaka Katagiri, Hillary Keenan, Kyoungmin Park, Yasutaka Maeda, Qian Li, Weier Qi, Thomas Thomou, Danielle Eschuk, Ana Tellechea, Aris Veves, Chenyu Huang, Dennis Paul Orgill, Amy Wagers, George L. King Source Type: research

Human umbilical cord matrix-derived stem cells exert trophic effects on {beta}-cell survival in diabetic rats and isolated islets RESEARCH ARTICLE
ABSTRACT Human umbilical cord matrix-derived stem cells (uMSCs), owing to their cellular and procurement advantages compared with mesenchymal stem cells derived from other tissue sources, are in clinical trials to treat type 1 (T1D) and type 2 diabetes (T2D). However, the therapeutic basis remains to be fully understood. The immunomodulatory property of uMSCs could explain the use in treating T1D; however, the mere immune modulation might not be sufficient to support the use in T2D. We thus tested whether uMSCs could exert direct trophic effects on β-cells. Infusion of uMSCs into chemically induced diabetic rats preve...
Source: DMM Disease Models and Mechanisms - December 4, 2015 Category: Biomedical Science Authors: Zhou, Y., Hu, Q., Chen, F., Zhang, J., Guo, J., Wang, H., Gu, J., Ma, L., Ho, G. Tags: RESEARCH ARTICLE Source Type: research