کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10956623 | 1099393 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hippocampal phenotypes in kalirin-deficient mice
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیولوژی سلول
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hippocampal phenotypes in kalirin-deficient mice Hippocampal phenotypes in kalirin-deficient mice](/preview/png/10956623.png)
چکیده انگلیسی
Regulation of forebrain cellular structure and function by small GTPase pathways is crucial for normal and pathological brain development and function. Kalirin is a brain-specific activator of Rho-like small GTPases implicated in neuropsychiatric disorders. We have recently demonstrated key roles for kalirin in cortical synaptic transmission, dendrite branching, spine density, and working memory. However, little is known about the impact of the complete absence of kalirin on the hippocampus in mice. We thus investigated hippocampal function, structure, and associated behavioral phenotypes in KALRN knockout (KO) mice we have recently generated. Here we show that KALRN KO mice had modest impairments in hippocampal LTP, but normal hippocampal synaptic transmission. In these mice, both context and cue-dependent fear conditioning were impaired. Spine density and dendrite morphology in hippocampal pyramidal neurons were not significantly affected in the KALRN KO mice, but small alterations in the gross morphology of the hippocampus were detected. These data suggest that hippocampal structure and function are more resilient to the complete loss of kalirin, and reveal impairments in fear learning. These studies allow the comparison of the phenotypes of different kalirin mutant mice and shed light on the brain region-specific functions of small GTPase signaling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular and Cellular Neuroscience - Volume 46, Issue 1, January 2011, Pages 45-54
Journal: Molecular and Cellular Neuroscience - Volume 46, Issue 1, January 2011, Pages 45-54
نویسندگان
Zhong Xie, Michael E. Cahill, Jelena Radulovic, Jing Wang, Susan L. Campbell, Courtney A. Miller, J. David Sweatt, Peter Penzes,