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Cryopreservation of Mouse Embryos by Ethylene Glycol-Based Vitrification
JoVE 3155 11/18/2011

Jan 2012 A gene for central respiratory regulation


mouse_of_month_201201

A gene for central respiratory regulation

B6.129P2-Dscamtm1.1Kzy/A151KzyRbrc RBRC05290

mn1201_0101
Dscam-/- P0 mice (C57BL/6 background) show jerky or dyspnea-like movements

Down syndrome cell adhesion molecule (DSCAM) is expressed in neuronal tissues and reportedly has diverse roles in neural development. To elucidate its physiological function in vivo, a targeted disruption of Dscam in mice was generated. Homozygous null mutants (Dscam(-/-)) were found to be lethal within 24 h of birth. Dscam(-/-) mice also had an irregular respiratory rhythm with frequent apneas. Detailed measurement of respiration in vivo and in vitro was performed to determine whether there was irregular respiration and a lower ventilatory response to hypercapnia in the null mutants. Heterozygous Dscam(+/-) mice, which survive to adulthood without significant abnormalities, also showed irregular respiration, but it was milder than that observed in the homozygous deficient mice. These mice are useful to study the physiological role of DSCAM in vivo and to understand the molecular mechanism of central respiratory regulation.

 

Depositor : Dr. Kazuhiro Yamakawa, RIKEN Brain Science Institute
Reference : Amano K, Fujii M, Arata S, Tojima T, Ogawa M, Morita N, Shimohata A,Furuichi T, Itohara S, Kamiguchi H, Korenberg JR, Arata A, Yamakawa K.
DSCAM deficiency causes loss of pre-inspiratory neuron synchroneity and perinatal death.
J Neurosci.; 29(9):2984-96, 2009.