Development of the somatosensory cortex, the cerebellum, and the main olfactory system in Semaphorin 3F knockout mice.
Semaphorin 3F (Sema3F) is a secreted type of the semaphorin family of axon guidance molecules. Sema3F and its receptor Neuropilin-2 (Npn-2) mRNAs were distributed in a mutually exclusive manner throughout mouse brain development. In order to examine physiological roles of Sema3F, we generated Sema3F knockout mice (KO) by gene targeting in embryonic stem (ES) cells. We found that the loss of Sema3F expression did not significantly affect the mRNA expression of Npn-2 or the other putative Npn-2 ligands, namely, Sema3B, Sema3C, or Sema3G. The barrel structure of the somatosensory cortex and the cerebellar neuroanatomy were not significantly altered in Sema3F KO. Finally, optical imaging of intrinsic signals of the dorsal olfactory bulb showed no significant differences in odor map between wild-type mice and Sema3F KO. These data suggest that Sema3F plays a relatively restricted, if any, role in its receptor expression and postnatal development of these brain structures.
Matsuda
Ikuo
I
Division of Molecular Genetics, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Japan. matsudai@hyo-med.ac.jp
Fukaya
Masahiro
M
Nakao
Harumi
H
Nakao
Kazuki
K
Matsumoto
Hideyuki
H
Mori
Kensaku
K
Watanabe
Masahiko
M
Aiba
Atsu
A
D000818:Animals; D002531:Cerebellum / Q000033:anatomy & histology / Q000254:growth & development* / Q000378:metabolism; D055786:Gene Knockout Techniques; D008565:Membrane Proteins / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D018345:Mice, Knockout; D009419:Nerve Tissue Proteins / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D039943:Neuropilin-2 / Q000378:metabolism; D009830:Olfactory Bulb / Q000033:anatomy & histology / Q000254:growth & development* / Q000378:metabolism; D009833:Olfactory Pathways / Q000033:anatomy & histology / Q000254:growth & development / Q000378:metabolism; D055696:Olfactory Perception / Q000502:physiology; D012333:RNA, Messenger / Q000378:metabolism; D039961:Semaphorins / Q000378:metabolism; D013003:Somatosensory Cortex / Q000033:anatomy & histology / Q000254:growth & development* / Q000378:metabolism
D008565:Membrane Proteins; D009419:Nerve Tissue Proteins; D039943:Neuropilin-2; D012333:RNA, Messenger; C526269:Sema3b protein, mouse; C491229:Sema3f protein, mouse; D039961:Semaphorins; C510203:semaphorin 3C protein, mouse; C505763:semaphorin 3G, mouse