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Despite the extensive literature concerning the neuropathy associated with diabetes, only limited information describes changes in the associated muscle. The objective of this study was to evaluate the histochemical and morphometric characteristics of diabetic muscle in the C57BL/KsJ db-m strain of mouse. The histochemical analysis of myofiber type for the diabetic mouse revealed that the extensor digitorum longus muscle consisted of 53.1% type 2a, 46.0% type 2b, and 0.9% type 1 myofibers, a significant shift from the percentages found in the nondiabetic litter mates (44.4% type 2a, 55.6% type 2b, no type 1). Computer-assisted morphometric analysis of myofiber size by fiber type indicated a significant difference in myofiber size for the type 2b fibers in muscles from diabetic mice. Similarly, there was a shift in the fiber size distribution to include a greater number of small type 2b myofibers when compared to controls. Skeletal muscle from diabetic mice exhibited a significant change in the percentage of fiber types, with an increase in the number of type 2a fibers, a fiber type grouping that implies possible denervation and reinnervation, and a decrease in myofiber size. These findings may explain why some diabetic patients complain of muscle weakness.
Anat Rec 1989 Sep
PMID:Skeletal muscle in the diabetic mouse: histochemical and morphometric analysis. 277 12

Papillomatous lesions intruding into the laryngeal airway were identified in an imported polo pony during a routine neurological examination for partial quadriplegia. Histological examination established a diagnosis of laryngeal besnoitiosis but it is unlikely that the laryngeal parasitism was associated with the cerebellar neuropathy which was also present.
Vet Rec 1986 Dec 13
PMID:Parasitic laryngeal papillomatosis in a horse. 310 Dec 72

A case of bilateral occurrence of a variant subscapularis muscle is reported. The superior lateral aspect of each subscapularis muscle presented a small accessory muscle with an accompanying tendon that inserted into the lesser tubercle of the humerus along with the primary tendon of the subscapularis muscle. Each accessory subscapularis muscle was separated from the primary subscapularis muscle by the axillary and inferior subscapular nerves. No branches of the axillary or inferior subscapular nerves supplied the primary subscapularis muscle or the accessory muscle while the nerves passed through the myotendinous tunnel. The relationship of the nerves with the variant subscapularis muscles has clinical significance with regard to entrapment neuropathy.
Anat Rec 1986 Nov
PMID:A rare human variation: the relationship of the axillary and inferior subscapular nerves to an accessory subscapularis muscle. 378 27

In 1990 an outbreak of ataxia occurred in over 700 pigs in the north of England. Epidemiological studies demonstrated that the disorder was associated with the consumption of feed from a particular supplier and that one component (wheat screenings) was common to the batch of feed with which the ataxia was associated. An analysis of the feed demonstrated the presence of an organophosphorus pesticide, later identified as isofenphos, a pesticide not approved for use in the United Kingdom. The wheat screenings had been imported from France and the warehouse in which they had been stored was contaminated with isofenphos, which is approved for restricted use in France. Isofenphos is known to cause delayed neuropathy. The dose to which the pigs were theoretically exposed would be expected to have resulted in neuropathy (manifested as ataxia).
Vet Rec 1995 Jan 28
PMID:Delayed neuropathy in pigs induced by isofenphos. 774 Jul 24

The degeneration of enteric neurones has been recorded in grass sickness, but the distribution of the lesions in the gut and their possible relationship with the severity of the clinical signs has not been established. Samples obtained from 11 anatomically defined sites along the gastrointestinal tract of eight control horses without gastrointestinal disease, five horses with acute grass sickness and three horses with chronic grass sickness were examined histologically. The organisation of the enteric ganglia was similar to that in other large mammalian species. Minor exceptions included the presence of fundic mucosal nerve cell bodies and blood vessels within submucosal ganglia. All the horses with grass sickness had severe enteric neuropathy, widespread in the acute cases but localised to the distal small intestine in the chronic cases. These neuronal lesions are consistent with, and may explain the intractable gastrointestinal propulsive deficit that characterises grass sickness.
Vet Rec 1993 Jun 26
PMID:Enteric neuropathy in horses with grass sickness. 836 69

Ileal biopsies were obtained from 18 horses with grass sickness, 15 horses with other alimentary disease and three horses without gastrointestinal disease. Samples of small intestine were also obtained from nine cases of obstruction due to small intestinal strangulation. Histological examination revealed that severe enteric neuropathy in the absence of other significant morphological changes was confined to the horses with grass sickness.
Vet Rec 1993 Jul 03
PMID:Diagnosis of grass sickness by ileal biopsy. 836 91

Seven beef cattle from a herd accidentally exposed to acrylamide and N-methylolacrylamide while grazing were observed for eight months. They showed clinical signs of impaired nerve function, mainly in the hindlegs, with varying degrees of weakness and ataxia. The animals were irritable, nervous and hypersensitive to touch. Both pupils of the most badly affected animal were dilated and it had poor pupillary light responses; it also showed signs of axonal neuropathy. Selected haematological and clinical chemistry variables were normal. The severity of the neurological signs was correlated with the concentrations of haemoglobin adducts of acrylamides. The animals recovered substantially after their exposure. The gestations of four of the animals which were in calf proceeded normally.
Vet Rec 2002 Dec 14
PMID:Acrylamide and N-methylolacrylamide poisoning in a herd of Charolais crossbreed cattle. 1251 Jun 66

In humans, the pelvic floor skeletal muscles support the viscera. Damage to innervation of these muscles during parturition may contribute to pelvic organ prolapse and urinary incontinence. Unfortunately, animal models that are suitable for studying parturition-induced pelvic floor neuropathy and its treatment are rare. The present study describes the intrapelvic skeletal muscles (i.e., the iliocaudalis, pubocaudalis, and coccygeus) and their innervation in the rat to assess its usefulness as a model for studies of pelvic floor nerve damage and repair. Dissection of rat intrapelvic skeletal muscles demonstrated a general similarity with human pelvic floor muscles. Innervation of the iliocaudalis and pubocaudalis muscles (which together constitute the levator ani muscles) was provided by a nerve (the "levator ani nerve") that entered the pelvic cavity alongside the pelvic nerve, and then branched and penetrated the ventromedial (i.e., intrapelvic) surface of these muscles. Innervation of the rat coccygeus muscle (the "coccygeal nerve") was derived from two adjacent branches of the L6-S1 trunk that penetrated the muscle on its rostral edge. Acetylcholinesterase staining revealed a single motor endplate zone in each muscle, closely adjacent to the point of nerve penetration. Transection of the levator ani or coccygeal nerves (with a 2-week survival time) reduced muscle mass and myocyte diameter in the iliocaudalis and pubocaudalis or coccygeus muscles, respectively. The pudendal nerve did not innervate the intrapelvic skeletal muscles. We conclude that the intrapelvic skeletal muscles in the rat are similar to those described in our previous studies of humans and that they have a distinct innervation with no contribution from the pudendal nerve.
Anat Rec A Discov Mol Cell Evol Biol 2003 Nov
PMID:Innervation of the levator ani and coccygeus muscles of the female rat. 1453 77

The general appearance of the innervation of samples of skin from 10 young beagles was studied by using the pan-neuronal immunolabel PGP9.5, and quantitative data on the density of the nerve fibres was obtained. The data provide a baseline for the development of a diagnostic test for small fibre neuropathy in domestic dogs.
Vet Rec 2009 Sep 12
PMID:Innervation of canine skin: an immunohistochemical study. 1974 8

The aim of this Phase II study was to determine the efficacy and safety of combined bortezomib and thalidomide (VT) regime as initial treatment for newly diagnosed patients with multiple myeloma (MM) in China. Thirty-four patients have been enrolled in this study and were planned to receive VT regime up to eight 21-day cycles. Bortezomib (1.3 mg/m(2) ) was given intravenously on days 1, 4, 8, and 11, while oral thalidomide (100 mg/day) was given on days 1 to 21. The primary end point was clinical response; the secondary end point was safety. Among 34 patients enrolled, 26 patients were able to complete the planned eight cycles of therapy. After eight cycles, the overall response rate was 100% (complete response 31%; near-complete response 23%; partial response 42%; minimal response 4%). The best response occurred within the first four cycles in 96% of patients. Adverse events included hematologic (53%), peripheral neuropathy (38%), fatigue (35%), gastrointestinal (45%), and fever (32%). Grade 3 nonhematologic adverse events included four patients (12%) with renal failure associated with tumor lysis syndrome, one patient (3%) with peripheral sensory and motor neuropathy that improved with VT dose reduction, and one patient (3%) with hypotension. One patient (3%) experienced Grade 4 thrombocytopenia. No patient experienced deep venous thrombosis, while 1 patient (3%) died due to acute renal failure. In conclusion, Bortezomib in combination with thalidomide is a very effective regimen for newly diagnosed MM patients and the toxicities are manageable.
Anat Rec (Hoboken) 2010 Oct
PMID:Bortezomib plus thalidomide for newly diagnosed multiple myeloma in China. 2073 18


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