کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9989625 1580761 2005 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A Golgi study of neuronal architecture in a genetic mouse model for Lesch-Nyhan disease
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی عصب شناسی
پیش نمایش صفحه اول مقاله
A Golgi study of neuronal architecture in a genetic mouse model for Lesch-Nyhan disease
چکیده انگلیسی
Lesch-Nyhan disease (LND) is an inherited disorder associated with deficiency of hypoxanthine-guanine phosphoribosyltransferase (HPRT), an enzyme essential for purine recycling. The clinical manifestations of the disorder and several neurochemical studies have pointed towards a defect in the striatum, but histological studies of autopsied brain specimens have not revealed any consistent abnormalities. An HPRT-deficient (HPRT−) mouse that has been produced as a model for the disease also exhibits neurochemical abnormalities of the striatum without obvious histological correlates. In the current studies, Golgi-Cox histochemistry was used to evaluate the fine structure of medium spiny I neurons from the striatum in the HPRT− mice. To determine if any abnormalities might be restricted to striatal neurons, the pyramidal projection neurons of layer 5 of the cerebral cortex were also evaluated. Neurons from both regions demonstrated a normal distribution, orientation, and gross morphology. There was no evidence for an abnormal developmental process or degeneration. However, both regions demonstrated a paucity of neurons with very long dendrites and a reduction in dendritic spines that depended upon the distance from the cell body. These findings demonstrate that HPRT deficiency is associated with changes in neuronal architecture in the HPRT− mice. Similar abnormalities in the LND brain could underlie some of the clinical manifestations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Disease - Volume 20, Issue 2, November 2005, Pages 479-490
نویسندگان
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