Haploinsufficiency of the 22q11.2 microdeletion gene Mrpl40 disrupts short-term synaptic plasticity and working memory through dysregulation of mitochondrial calcium.
Haploinsufficiency of the 22q11.2 microdeletion gene Mrpl40 disrupts short-term synaptic plasticity and working memory through dysregulation of mitochondrial calcium.
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DOI:
10.1038/mp.2016.75
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发表时间:
2017-09
影响因子:
11
通讯作者:
Zakharenko, S. S.
中科院分区:
文献类型:
--
作者:
Devaraju, P.;Yu, J.;Eddins, D.;Mellado-Lagarde, M. M.;Earls, L. R.;Westmoreland, J. J.;Quarato, G.;Green, D. R.;Zakharenko, S. S.
Hemizygous deletion of a 1.5- to 3-megabase region on chromosome 22 causes 22q11.2 deletion syndrome (22q11DS), which constitutes one of the strongest genetic risks for schizophrenia. Mouse models of 22q11DS have abnormal short-term synaptic plasticity that contributes to working-memory deficiencies similar to those in schizophrenia. We screened mutant mice carrying hemizygous deletions of 22q11DS genes and identified haploinsufficiency of Mrpl40 (mitochondrial large ribosomal subunit protein 40) as a contributor to abnormal short-term potentiation (STP), a major form of short-term synaptic plasticity. Two-photon imaging of the genetically encoded fluorescent calcium indicator GCaMP6, expressed in presynaptic cytosol or mitochondria, showed that Mrpl40 haploinsufficiency deregulates STP via impaired calcium extrusion from the mitochondrial matrix through the mitochondrial permeability transition pore. This led to abnormally high cytosolic calcium transients in presynaptic terminals and deficient working memory but did not affect long-term spatial memory. Thus, we propose that mitochondrial calcium deregulation is a novel pathogenic mechanism of cognitive deficiencies in schizophrenia.
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DOI:
10.1523/jneurosci.1312-12.2012
发表时间:
2012-10-10
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Earls LR;Fricke RG;Yu J;Berry RB;Baldwin LT;Zakharenko SS
通讯作者:
Zakharenko SS
DOI:
10.1111/j.1460-9568.2010.07576.x
发表时间:
2011-03
期刊:
The European journal of neuroscience
影响因子:
--
作者:
Barsukova A;Komarov A;Hajnóczky G;Bernardi P;Bourdette D;Forte M
通讯作者:
Forte M
影响因子:
64.8
作者:
Greber, Basil J.;Boehringer, Daniel;Ban, Nenad
通讯作者:
Ban, Nenad
影响因子:
5.3
作者:
Kandaswamy, Umasankar;Deng, Pan-Yue;Klyachko, Vitaly A.
通讯作者:
Klyachko, Vitaly A.
影响因子:
3.7
作者:
Crabtree GW;Gogos JA
通讯作者:
Gogos JA