PMID- 23830992 OWN - NLM STAT- MEDLINE DCOM- 20150514 LR - 20140203 IS - 1618-0372 (Electronic) IS - 0065-1281 (Linking) VI - 116 IP - 1 DP - 2014 Jan TI - Reduced expression of Munc13-1 in human and porcine diabetic peripheral nerve. PG - 106-11 LID - S0065-1281(13)00109-8 [pii] LID - 10.1016/j.acthis.2013.05.010 [doi] AB - Peripheral neuropathy (PN) involves widespread peripheral nerve disorders affecting a large human population worldwide. In Europe and the United States, the first single most prominent cause of peripheral neuropathy is diabetes, affecting 60-70% patients with long-term diabetes followed by idiopathic neuropathy, peripheral nerve damage of unknown etiology, diagnosed in 10-40% of all patients admitted to hospitals with symptoms of peripheral nerve damage. The molecular mechanisms underlying the pathogenesis of this disorder are not yet fully understood, however a few potential molecular contributors, such as Munc13-1, have been recently suggested. Munc13-1 is a diacylglycerol (DAG) receptor and a multifunction active zone protein essential for synaptic vesicle priming and crucial for insulin release from pancreatic beta cells. Here, for the first time, we focused on the comparative expression of Munc13-1 in human and porcine peripheral nerves. Our results revealed significantly reduced number of Munc13-1 in human (64.26% +/- 6.68%) and porcine (84.09% +/- 2.21%) diabetic nerve fibers and lower number of the double stained, neuronal marker, Neurofilament (NF) and Munc13-1 positive, human (56.83% +/- 3.77%) and porcine (65.87% +/- 4.86%) nerve fibers. Optical density quantification of Western blots showed similar results. Our study indicates that Munc13-1, on account of its role in both insulin and neurotransmitter exocytosis and through its binding properties, may be an important factor contributing to the development or progression of diabetic neuropathy. CI - Copyright (c) 2013 Elsevier GmbH. All rights reserved. FAU - Juranek, Judyta K AU - Juranek JK AD - Department of Surgery, Columbia University Medical Center, New York, USA; Diabetes Research Program, Department of Medicine, NYU Medical Center, New York, USA. Electronic address: judytajuranek@gmail.com. FAU - Geddis, Matthew S AU - Geddis MS AD - Department of Surgery, Columbia University Medical Center, New York, USA; Department of Science, BMCC-City University of New York, New York, USA. FAU - Kothary, Pratik AU - Kothary P AD - Department of Surgery, Columbia University Medical Center, New York, USA; Diabetes Research Program, Department of Medicine, NYU Medical Center, New York, USA. FAU - Hays, Arthur AU - Hays A AD - Department of Pathology, Columbia University Medical Center, New York, USA. FAU - Schmidt, Ann Marie AU - Schmidt AM AD - Department of Surgery, Columbia University Medical Center, New York, USA; Diabetes Research Program, Department of Medicine, NYU Medical Center, New York, USA. FAU - Brannagan, Thomas H 3rd AU - Brannagan TH 3rd AD - Department of Neurology, Columbia University Medical Center, New York, USA. LA - eng PT - Journal Article DEP - 20130705 PL - Germany TA - Acta Histochem JT - Acta histochemica JID - 0370320 RN - 0 (Nerve Tissue Proteins) RN - 0 (UNC13B protein, human) SB - IM MH - Aged MH - Aged, 80 and over MH - Animals MH - Case-Control Studies MH - Diabetes Mellitus, Type 2/complications/*metabolism MH - Diabetic Neuropathies/*metabolism MH - Humans MH - Intermediate Filaments/metabolism MH - Male MH - Middle Aged MH - Nerve Tissue Proteins/*metabolism MH - Peripheral Nerves/metabolism MH - Sus scrofa OTO - NOTNLM OT - Diabetes OT - Human OT - Immunofluorescence OT - Munc13-1 OT - Peripheral neuropathy OT - Pig EDAT- 2013/07/09 06:00 MHDA- 2015/05/15 06:00 CRDT- 2013/07/09 06:00 PHST- 2013/03/03 00:00 [received] PHST- 2013/05/28 00:00 [revised] PHST- 2013/05/29 00:00 [accepted] PHST- 2013/07/09 06:00 [entrez] PHST- 2013/07/09 06:00 [pubmed] PHST- 2015/05/15 06:00 [medline] AID - S0065-1281(13)00109-8 [pii] AID - 10.1016/j.acthis.2013.05.010 [doi] PST - ppublish SO - Acta Histochem. 2014 Jan;116(1):106-11. doi: 10.1016/j.acthis.2013.05.010. Epub 2013 Jul 5.