Abstract：
:Diabetes mellitus can lead to functional and structural deficits in both the peripheral and central nervous system. The pathogenesis of these deficits is multifactorial, probably involving, among others, microvascular dysfunction and alterations in intracellular calcium homeostasis. The present study examined the effects of treatment with the Ca2+ antagonist nimodipine (20 mg/kg, intraperitoneal injection, every 48 h) on functional deficits in the peripheral and central nervous system in streptozotocin-diabetic rats. In a prevention experiment, treatment was initiated immediately after diabetes induction and continued for 10 weeks. In a reversal experiment, treatment was initiated 16 weeks after diabetes induction and continued for 12 weeks. Sciatic nerve motor and sensory conduction velocity, brainstem auditory-evoked potentials, and visual-evoked potentials were measured in control, untreated, and nimodipine-treated diabetic rats. In addition, long-term potentiation, a form of synaptic plasticity used as a model for learning and memory at the cellular level, was examined in hippocampal slices. Nimodipine treatment partially prevented deficits in nerve conduction velocity and hippocampal long-term potentiation in diabetic rats. However, nimodipine intervention treatment was unable to reverse established deficits in nerve conduction velocity, evoked potential latencies, or long-term potentiation. It is concluded that nimodipine can partially prevent early functional deficits in the peripheral and central nervous system of streptozotocin-diabetic rats but is unable to reverse late deficits.
journal_name
Brain Resjournal_title
Brain researchauthors
Biessels GJ,ter Laak MP,Kamal A,Gispen WHdoi
10.1016/j.brainres.2004.12.025subject
Has Abstractpub_date
2005-02-21 00:00:00pages
86-93issue
1eissn
0006-8993issn
1872-6240pii
S0006-8993(04)01948-1journal_volume
1035pub_type
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