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Abelson Kinases Mediate the Depression of Spontaneous Synaptic Activity Induced by Amyloid Beta 1–42 Peptides

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Abstract

Amyloid beta (Aβ) peptides represent one of the most studied etiological factors of Alzheimer’s disease. Nevertheless, the effects elicited by different molecular forms of amyloid beta peptides widely vary between the studies, mostly depending on experimental conditions. Despite the enormous amount of accumulated evidences concerning the pathological effects of amyloid beta peptides, the exact identity of the amyloid beta species is still controversial, and even less is clear as regards to the downstream effectors that mediate the devastating impact of these peptides on synapses in the central nervous system. Recent publications indicate that some of the neurotoxic effects of amyloid beta peptides may be mediated via the activation of proteins belonging to the Abelson non-receptor tyrosine kinase (Abl) family, that are known to regulate actin cytoskeleton structure as well as phosphorylate microtubule-associated tau protein, a hallmark of Alzheimer’s disease. By performing series of miniature excitatory postsynaptic currents (mEPSC) recordings in cultured hippocampal cells, we demonstrate that activation of Abl kinases by acute application of 42 amino acid-length monomeric amyloid beta (Aβ1-42) peptides reduces spontaneous synaptic release, while this effect can be rescued by pharmacologic inhibition of Abl kinase activity, or by reduction of Abl expression with small interfering RNAs. Our electrophysiological data are further reinforced by a subsequent biochemical analysis, showing enhanced phosphorylation of Abl kinase substrate CT10 Regulator of Kinase-homolog-Like (Crkl) upon treatment of hippocampal neurons with Aβ peptides. Thus, we conclude that Abl kinase activation may be involved in Aβ-induced weakening of synaptic transmission.

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Abbreviations

Abl:

Abelson non-receptor tyrosine kinase

Aβ:

Amyloid beta peptide

CrkL:

CT10 Regulator of Kinase-homolog-Like protein

DIV:

Days in vitro

DMSO:

Dimethyl sulfoxide

DPH:

5-(1,3-Diaryl-1H-pyrazol-4-yl) hydantoin

ECS:

Extracellular recording solution

IEIs:

Inter-event intervals

mEPSC:

Miniature excitatory postsynaptic currents

siRNA:

Small interfering RNAs

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Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

Authors

Contributions

MR designed and performed electrophysiological and biochemical experiments, analyzed data, prepared figures, participated in manuscript writing, AS performed electrophysiological experiments, analyzed data, NB performed biochemical experiments, analyzed Western blot data, TB performed HPLC experiments and analyzed HPLC data, IM designed experiments, integrated data, supervised, wrote the manuscript.

Corresponding author

Correspondence to I. Michaelevski.

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Conflicts of interest

On behalf of all the authors of the manuscript, as the corresponding author, I declare NO competing financial interests.

Research Involving Human Participants and/or Animals

This research does not include human participants. This research includes animal resources approved the IACUC of Tel Aviv University (IL-12–024) and Ariel University (IL-147–07-17).

Informed Consent

On behalf of all the authors of the manuscript, as the corresponding author, I declare that Informed consent is not applicable since no human participants were involved in this study.

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Reichenstein, M., Borovok, N., Sheinin, A. et al. Abelson Kinases Mediate the Depression of Spontaneous Synaptic Activity Induced by Amyloid Beta 1–42 Peptides. Cell Mol Neurobiol 41, 431–448 (2021). https://doi.org/10.1007/s10571-020-00858-7

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  • DOI: https://doi.org/10.1007/s10571-020-00858-7

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