Skeletal muscle is highly adaptable in response to increases and decreases in contractile activity. The purpose of this study was to determine whether the preconditioning of skeletal muscle has a protective effect against subsequent denervation-induced apoptotic protein expression. To investigate this, we chronically stimulated the tibialis anterior and extensor digitorum longus muscles for 7 d...

It was hypothesized that renal sympathetic nerve activity (RSNA) and neuronal nitric oxide synthase (nNOS) are involved in the acute inhibition of renin secretion and the natriuresis following slow NaCl loading (NaLoad) and that RSNA participates in the regulation of arterial blood pressure (MABP). This was tested by NaLoad after chronic renal denervation with and without inhibition of nNOS by ...

To test the hypothesis that human muscular dystrophies may be secondary to denervation, the responses in vitro of muscle in human malignant hyperpyrexia to electrical and pharmacological stimuli have been compared with those of the denervated mouse soleus muscle. The results suggest that the muscle abnormality in malignant hyperpyrexia is different from that produced by denervation. This must c...

UNLABELLED Unloading can prevent bone formation by osteoblasts. To study this mechanism, we focused on a ubiquitin ligase, Cbl-b, which was highly expressed in osteoblastic cells during denervation. Our results suggest that Cbl-b may mediate denervation-induced osteopenia by inhibiting IGF-I signaling in osteoblasts. INTRODUCTION Unloading, such as denervation (sciatic neurectomy) and spacefl...

The role of the adrenergic nervous system in the response to coronary artery occlusion has been examined using surgical and chemical denervation techniques. Experiments were conducted on four groups of dogs (n = 18): 1) untreated controls; 2) intrapericardial denervation immediately prior to coronary ligation; 3) surgical denervation 2 weeks prior to the experiment; and 4) chemical sympathectom...

Age-related but not artificially induced muscle fiber atrophy has been shown to occur without any decrease in myonuclear number, although these results remain controversial. The present study was carried out to clarify whether age difference affects the degree of decrease in myonuclear number occurring with denervation-induced fiber atrophy. After denervation of 3-wk-old (young) and 4-mo-old (m...

Recent research has suggested that mild denervation of the neocortex of adult rats may facilitate neuronal growth in response to behavioral changes. Astrocytes react to denervation, produce growth-promoting factors and are a potential mediator of this denervation-facilitated growth. The present study assessed whether astrocytic reactions to denervation vary dependent upon post-injury behavioral...

OBJECTIVE Previous studies have shown that chronic cardiac denervation impairs myocardial glucose oxidation. To investigate this further we tested whether the tissue content of glucose transporters, activity of glycolytic enzymes or metabolic capacity of pyruvate dehydrogenase were altered. Moreover, we investigated whether the decline in glucose utilization was associated with an upregulation ...

an 8-year-old female japanese spitz dog was reffered to shiraz university veterinary clinic, with signof anisocoria. clinical examinations revealed mydriasis in the right eye. ocular examination revealed adilated and unresponsive right pupil to focal illumination. by testing with topical 2% pilocarpine, thetentative diagnosis was parasympathetic denervation of the right iris sphincter muscle—pu...

kennedy disease is a rare x-linked neurodegenerative disorder that affects patients in 30-50 years of age. it is caused by cag-repeat in androgen receptor gen. there is no known effective treatment for kennedy disease. we report a 60-year-old man who had fasciculations and proximal and distal muscle weakness. physical examination showed involvement of the bulbar musculature accompanied by tongu...