The Role of Iron and Nerve Inflammation in Diabetes Mellitus Type 2-Induced Peripheral Neuropathy

Publication date: Available online 10 March 2019Source: NeuroscienceAuthor(s): Sabine Paeschke, Petra Baum, Klaus V. Toyka, Matthias Blüher, Severin Koj, Nora Klöting, Ingo Bechmann, Joachim Thiery, Joanna Kosacka, Marcin NowickiAbstractPeripheral diabetic neuropathy (PDN) is one of the common complications of diabetes mellitus. Previous studies showed an association between dietary iron load and inflammation in the development of PDN in a rat model of type 1 diabetes (T1D). Here we investigated the role of iron and neural inflammation in development of PDN in the animal model of obesity and type 2 diabetes (T2D). 3-month-old db/db mice were fed with a high, standard or low iron diet for 4 months. High iron chow lead to a significant increase in motor nerve conduction velocities as compared to mice on standard and low iron chow. Direct beneficiary effects on lowering blood glucose and HbA1c concentrations were shown in the high iron treated diabetic mice. Numbers of pro-inflammatory M1 macrophages were reduced in nerve sections and anti-inflammatory M2 macrophages were increased in db/db mice on high iron diet as compared to other groups. These results confirm and extend our previous findings in STZ-diabetic rats by showing that dietary non-hem iron supplementation may partly prevent the development of PDN in opposition to iron restriction. The identification of these dietary iron effects on the metabolic and inflammatory mechanisms of PDN supports a role of dietary iron ...
Source: Neuroscience - Category: Neuroscience Source Type: research