Two phases of nitrergic neuropathy in streptozotocin-induced diabetic rats.
نویسندگان
چکیده
The distinction between metabolic and structural changes occurring in autonomic neurons during diabetes has not been fully clarified. Here we demonstrate that nitric oxide synthase-containing (nitrergic) neurons innervating the penis and gastric pylorus of streptozotocin-induced diabetic rats undergo a selective degenerative process in two phases. In the first phase, nitrergic nerve fibers lose some of their neuronal nitric oxide synthase content and function. In the second phase, nitrergic degeneration takes place in the cell bodies in the ganglia, leading to complete loss of nitrergic function. The changes in the first phase are reversible with insulin replacement; however, the neurodegeneration in the second phase is irreversible. Neurodegeneration is due to apoptotic cell death in the ganglia, which is selective for the nitrergic neurones.
منابع مشابه
Nitrergic neurodegeneration in cerebral arteries of streptozotocin-induced diabetic rats: a new insight into diabetic stroke.
Although autonomic neuropathy is recognized as an independent risk factor for stroke in diabetes, the mechanism by which autonomic nerves are involved in this pathology is unknown. Parasympathetic (cholinergic) nerves of the autonomic nervous system are known to innervate and to cause relaxation of cerebral arteries by releasing nitric oxide (NO); hence, they are called nitrergic nerves. Howeve...
متن کاملEffects of Melatonin and Vitamin E on Peripheral Neuropathic Pain in Streptozotocin-Induced Diabetic Rats
Objective(s) Previous studies have indicated that diabetes mellitus might be accompanied by neuropathic pain. Oxidative stress is implicated as a final common pathway in development of diabetic neuropathy. Pharmacological interventions targeted at inhibiting free radical production have shown beneficial effects in diabetic neuropathy. The aim of this study was to investigate and compare the po...
متن کاملThe effect of Capsicum frutescens on formalin-induced flinching behavior in streptozotocin-diabetic rats
Diabetic rats in long-term display an augmented nociceptive response to chemical, mechanical, and thermal stimuli. Furthermore, hyperalgesia is one of the major symptoms of diabetic neuropathy in some patients. Considering the antidiabetic potential of pepper, this study was conducted to evaluate the possible analgesic effect of pepper-mixed food intake in male streptozotocin-induced diabetic r...
متن کاملThe effect of Capsicum frutescens on formalin-induced flinching behavior in streptozotocin-diabetic rats
Diabetic rats in long-term display an augmented nociceptive response to chemical, mechanical, and thermal stimuli. Furthermore, hyperalgesia is one of the major symptoms of diabetic neuropathy in some patients. Considering the antidiabetic potential of pepper, this study was conducted to evaluate the possible analgesic effect of pepper-mixed food intake in male streptozotocin-induced diabetic r...
متن کاملThe analgesic effect of Capsicum frutescens in streptozotocin-diabetic rats using formalin test
Diabetic rats in long-term display an augmented nociceptive response to chemical, mechanical, and thermal stimuli. Furthermore, hyperalgesia is one of the major symptoms of diabetic neuropathy in some patients. Considering the antidiabetic potential of pepper, this study was carried out to evaluate the possible analgesic effect of pepper-mixed food intake in male streptozotocin-induced diabetic...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Diabetes
دوره 52 9 شماره
صفحات -
تاریخ انتشار 2003