A Two-Clone Approach to Study Signaling Interactions among Neuronal Cells in a Pre-clinical Alzheimer's Disease Model.

A Two-Clone Approach to Study Signaling Interactions among Neuronal Cells in a Pre-clinical Alzheimer's Disease Model.
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DOI:
10.1016/j.isci.2020.101823
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发表时间:
2020-12-18
期刊:
影响因子:
5.8
通讯作者:
Singh A
Singh A
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Yeates CJ;Sarkar A;Deshpande P;Kango-Singh M;Singh A

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To understand the progression of Alzheimer's disease, studies often rely on ectopic expression of amyloid-beta 42 (Aβ42) throughout an entire tissue. Uniform ectopic expression of Aβ42 may obscure cell-cell interactions that contribute to the progression of the disease. We developed a two-clone system to study the signaling cross talk between GFP-labeled clones of Aβ42-expressing neurons and wild-type neurons simultaneously generated from the same progenitor cell by a single recombination event. Surprisingly, wild-type clones are reduced in size as compared with Aβ42-producing clones. We found that wild-type cells are eliminated by the induction of cell death. Furthermore, aberrant activation of c-Jun-N-terminal kinase (JNK) signaling in Aβ42-expressing neurons sensitizes neighboring wild-type cells to undergo progressive neurodegeneration. Blocking JNK signaling in Aβ42-producing clones restores the size of wild-type clones. In the two-clone system a subset of neurons in a field expresses high levels of Aβ42 A genetic recombination event generates Aβ42-expressing (GFP +ve) and WT neurons Surprisingly, WT neurons die prior to widespread death of Aβ42-expressing neurons Higher levels of JNK signaling in Aβ42-expressing cells causes death of WT neurons Cell Biology; Molecular Biology; Neuroscience
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