國家衛生研究院 NHRI:Item 3990099045/12332

NHRI > National Institute of Environmental Health Sciences > Lukas Jyuhn-Hsiarn Lee > Periodical Articles > Item 3990099045/12332

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/12332

Title:	Characterization of striatal phenotypes in heterozygous Disc1 mutant mice, a model of haploinsufficiency
Authors:	Baskaran, R;Lai, CC;Li, WY;Tuan, LH;Wang, CC;Lee, LJ;Liu, CM;Hwu, HG;Lee, LJ
Contributors:	National Institute of Environmental Health Sciences
Abstract:	Disrupted-in-Schizophrenia 1 (DISC1) is a susceptibility gene for several psychiatric illnesses. To study the pathogenesis of these disorders, we generated Disc1 mutant mice by introducing the 129S6/SvEv 25-bp deletion Disc1 variants into the C57BL/6J strain. In this study, we used heterozygous Disc1 mutant (Het) mice to evaluate the DISC1 haploinsufficiency model of schizophrenia. No changes in locomotor behaviors were observed in Het mice; however, after amphetamine injection, greater locomotor activity was observed in Het mice compared with wild-type (WT) mice. Moreover, amphetamine-induced elevations of c-Fos expression and dopamine level in the striatum were greater in Het mice than in WT controls, suggesting an altered dopaminergic regulation in the striatum of Het mice. Compared with those in WTs, the striatal protein levels of dopamine transporter and D2 dopamine receptor were increased in Het mice, while D1 dopamine receptor level was decreased. DISC1 interacting proteins, GSK3alpha and GSK3beta, were downregulated in Het mice, whereas the levels of PDE4B and CREB were not altered. Morphologically, the complexities of striatal median spiny neurons (MSNs), parvalbumin-positive interneurons and Iba1-positive microglia were all decreased in Het mice. The density and head diameter of dendritic spines in the MSNs of Het mice were also reduced. Our results indicate that mice lacking one WT Disc1 allele are more sensitive to psychostimulant amphetamine challenge, which might be attributed to the altered structure and function of the striatal dopaminergic system. Here, we demonstrated striatal phenotypes in heterozygous Disc1 mutant mice, which could be a promising model of DISC1 haploinsufficiency.
Date:	2020-05
Relation:	Journal of Comparative Neurology. 2020 May;528(7):1157-1172.
Link to:	http://dx.doi.org/10.1002/cne.24813
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0021-9967&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000498589900001
Cited Times(Scopus):	https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85075759408
Appears in Collections:	[Lukas Jyuhn-Hsiarn Lee] Periodical Articles

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