کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4524828 1323594 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Alterations in both acetylcholinesterase activity and synaptic scaffolding protein localization in the nervous system of Drosophila presenilin mutants
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Alterations in both acetylcholinesterase activity and synaptic scaffolding protein localization in the nervous system of Drosophila presenilin mutants
چکیده انگلیسی

Presenilins are one of two types of critical genetic factors in familial Alzheimer's disease, and they regulate various cellular functions such as intracellular Ca2+ homeostasis, the endoplasmic reticulum (ER) stress response, apoptosis, and synaptic transmission. We utilized Drosophila presenilin (psn) mutants as a model for studying the role of this gene in regulating acetylcholinesterase activity (AChE) and synaptic plasticity. Several lines of biochemical evidence indicated that AChE activity in a functionally null psn mutant (psnB3) was significantly reduced. In addition, we also found that psnB3 mutant neuromuscular junctions (NMJs) had smaller synaptic boutons and altered localization of Discs large, a synaptic scaffolding protein at the synaptic terminals compared to wild-type controls. These phenotypic defects were completely rescued in transgenic lines expressing the long form of wild-type Psn under an endogenous psn promoter cassette (PEPC-PsnWT;psnB3 lines). Taken together, these results indicate that Psn is important for regulating AChE activity, the size of synaptic boutons, and the localization of DLG at synaptic terminals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asia-Pacific Entomology - Volume 13, Issue 4, December 2010, Pages 339–343
نویسندگان
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