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Deconstructing brain-derived neurotrophic factor actions in adult brain circuits to bridge an existing informational gap in neuro-cell biology

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Neural Regeneration Research 2016年第3期11卷 363-367页

作者： heather bowling Aditi Bhattacharya Eric Klann Moses V.Chao Center for Neural Science New York University Center for Brain Development and Repair Institute for Stem Cell Biology and Regenerative Medicine Departments of Cell Biology Physiologyand Neuroscience and PsychiatryKimmel Center for Biology and Medicine at the Skirball InstituteNew York University School of Medicine

Brain-derived neurotrophic factor（BDNF） plays an important role in neurodevelopment,synaptic plasticity,learning and memory,and in preventing *** decades of investigations into downstream signaling cascades and changes in cellular processes,the mechanisms of how BDNF reshapes circuits in vivo remain *** informational gap partly arises from the fact that the bulk of studies into the molecular actions of BDNF have been performed in dissociated neuronal cultures,while the majority of studies on synaptic plasticity,learning and memory were performed in acute brain slices or in vivo.A recent study by bowling-Bhattacharya et al.,measured the proteomic changes in acute adult hippocampal slices following treatment and reported changes in proteins of neuronal and non-neuronal origin that may in concert modulate synaptic release and secretion in the *** this paper,we place these findings into the context of existing literature and discuss how they impact our understanding of how BDNF can reshape the brain.

关键词： BONLAC BDNF adult slice proteomics neuroproteomics SILAC BONCAT hippocampus proteinsynthesis

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Systemic RNAi in western corn rootworm, Diabrotica virgifera virgifera, does not involve transitive pathways

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Insect Science 2018年第1期25卷 45-56页

作者： Huarong Li Andrew J. bowling Premchand Gandra Murugesan Rangasamy heather E. Pence Robert E. McEwan Chitvan Khajuria Blair D. Siegfried Kenneth E. Narva Dow AgroSciences LLC 9330 Zionsville Rd. Indianapolis Indiana USA Department of Entomology University of Nebraska Lincoln Nebraska USA Monsanto Company Chesterfield Missouri USA Entomology and Nematology Department University of Florida Gainesville Florida USA

Western corn rootworm （WCR, Diabrotica virgifera virgifera LeConte） is highly sensitive to orally delivered double-stranded RNA （dsRNA）. RNAi in WCR is systemic and spreads throughout the insect body. This raises the question whether transitive RNAi is a mechanism that functions in WCR to amplify the RNAi response via production of secondary siRNA. Secondary siRNA production is achieved through RNA-dependent RNA polymerase （RdRP） activity in other eukaryotic organisms, but RdRP has not been identified in WCR and any other insects. This study visualized the spread of the RNAi- mediated knockdown of Dr v-ATPase C mRNA throughout the WCR gut and other tissues using high-sensitivity branched DNA in situ hybridization. Furthermore, we did not detect either secondary siRNA production or transitive RNAi in WCR through siRNA sequence profile analysis. Nucleotide mismatched sequences introduced into either the sense or antisense strand of v-ATPase C dsRNAs were maintained in siRNAs derived from WCR fed with the mismatched dsRNAs in a strand specific manner. The distribution of all siRNAs was restricted to within the original target sequence regions, which may indicate the lack of new dsRNA synthesis leading to production of secondary siRNA. Thus, the systemic spread of RNAi in WCR may be derived from the original dsRNA molecules taken up from the gut lumen. These results indicate that the initial dsRNA dose is important for a lethal systemic RNAi response in WCR and have implications in developing effective dsRNA traits to control WCR and in resistance management to prolong the durability of RNAi trait technology.

关键词： corn rootworm Diabrotica secondary siRNA production systemic RNAi transitive RNAi

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Radiation-Induced Chromosome Instability in WTK1 and TK6 Human Lymphoblastoid Cells

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Advances in Biological Chemistry 2023年第2期13卷 57-70页

作者： Alan Chant heather Driscoll Joshua L. Weiss Ahmad Chaudary Christina M. Kraemer-Chant Department of Chemistry Saint Michael’s College Colchester USA Department of Biology Norwich University Northfield USA Department of Public and Allied Health Bowling Green State University Bowling Green USA

The effects of ionizing radiation on single nucleotide polymorphism (SNP) copy number variations between TK6 and WTK1 cell lines are described herein. Specifically, the integrity of the chromosomes for two WIL2-derived lymphoblastoid cell lines (TK6 and WTK1) was analyzed in the presence and absence of ionizing radiation. WTK1 cells contain a p53 mutation, whereas the TK6 cell line has the native p53 tumor-suppressor gene. Each cell line was isolated post-irradiation for SNP analysis, which showed significant, genome-wide impacts on both cell lines;for the mutant WTK1 sample, there were a total of 48 gene deletions and no gene amplifications, whereas for the wild-type TK6 sample, there were 217 gene deletions and 9 gene amplifications. It appears that both cell lines are affected in the areas of cell-cycle control, but that other affected areas differ significantly between the two.

关键词： Ionizing Radiation Single Nucleotide Polymorphism p53 Tumor Suppressor

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