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- W600986351 abstract "Calpain plays an important role in the pathophysiology of neurological and cardiovascular complications, but its functional association in diabetic neuropathy is not yet elucidated. Therefore, we investigated the role of calpain in modulation of tetrodotoxin-resistant sodium channels (TTX-R Na(+) channels) in dorsal root ganglion (DRG) neurons using a pharmacological approach. The effects of a calpain inhibitor, MDL 28170 (3 and 10 mg/kg, i.p.) on TTX-R Na(+) channels in DRG neurons of streptozotocin-induced diabetic rats were assessed by using whole-cell patch-clamp technique. In addition to this biochemical, functional and behavioral deficits were also measured. Diabetic rats demonstrated the mechanical allodynia and thermal hyperalgesia with reduced nerve perfusion and conduction velocity as compared to control. MDL 28170 treatments significantly recovered these functional and nociceptive deficits. Moreover, diabetic rats exhibited increased calpain activation, lipid peroxidation and proinflammatory cytokines as compared to control. Drug treatment significantly improved these biochemical deficits. Additionally, DRG neurons from diabetic rats illustrated a significant increase in TTX-R sodium current (INa) density as compared to control. MDL 28170 treatments in diabetic rats significantly blocked the altered channel kinetics with hyperpolarizing shift in voltage-dependence of steady-state activation and inactivation curves. All together, our study provides evidence that calpain activation is directly associated with alterations in TTX-R Na(+) channels and triggers functional, nociceptive and biochemical deficits in experimental diabetic neuropathy. The calpain inhibitor, MDL 28710 have shown beneficial effects in alleviating diabetic neuropathy via modulation of TTX-R Na(+) channel kinetics and reduction of oxidative stress and neuro-inflammation." @default.
- W600986351 created "2016-06-24" @default.
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- W600986351 date "2015-10-01" @default.
- W600986351 modified "2023-10-14" @default.
- W600986351 title "Calpain inhibitor, MDL 28170 confer electrophysiological, nociceptive and biochemical improvement in diabetic neuropathy" @default.
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- W600986351 doi "https://doi.org/10.1016/j.neuropharm.2015.05.040" @default.
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