RRC ID 48831
Author Takeuchi M, Inoue C, Goshima A, Nagao Y, Shimizu K, Miyamoto H, Shimizu T, Hashimoto H, Yonemura S, Kawahara A, Hirata Y, Yoshida M, Hibi M.
Title Medaka and zebrafish contactin1 mutants as a model for understanding neural circuits for motor coordination.
Journal Genes Cells
Abstract A spontaneous medaka ro mutant shows abnormal wobbling and rolling swimming behaviors. By positional cloning, we mapped the ro locus to a region containing the gene encoding Contactin1b (Cntn1b), which is an immunoglobulin (Ig)-superfamily domain-containing membrane-anchored protein. The ro mutant had a deletion in the cntn1b gene that introduced a premature stop codon. Furthermore, cntn1b mutants generated by the CRISPR/Cas9 system and trans-heterozygotes of the CRISPR mutant allele and ro had abnormal swimming behavior, indicating that the cntn1b gene was responsible for the ro-mutant phenotype. We also established zebrafish cntn1a and cntn1b mutants by transcription activator-like effector nucleases (TALENs). Zebrafish cntn1b but not cntn1a mutants showed abnormal swimming behaviors similar to those in the ro mutant, suggesting that Cntn1b plays a conserved role in the formation or function of the neural circuits that control swimming in teleosts. Although Cntn1-deficient mice have abnormal cerebellar neural circuitry, there was no apparent histological abnormality in the cerebellum of medaka or zebrafish cntn1b mutants. The medaka cntn1b mutants had defective optokinetic response (OKR) adaptation and abnormal rheotaxis (body positioning relative to water flow). Medaka and zebrafish cntn1b mutants are effective models for studying the neural circuits involved in motor learning and motor coordination.
Volume 22(8)
Pages 723-741
Published 2017-8-1
DOI 10.1111/gtc.12509
PMID 28639422
MeSH Animals Cerebellum / metabolism Cerebellum / physiology Codon, Terminator / genetics* Contactin 1 / genetics Contactin 1 / metabolism* Learning Motor Neurons / metabolism Motor Neurons / physiology Neural Pathways / metabolism Neural Pathways / physiology Oryzias Swimming* Zebrafish Zebrafish Proteins / genetics Zebrafish Proteins / metabolism*
IF 1.655
Times Cited 3
Medaka ro (MT92) contactin1b^E3+35 (MT1169) contactin1b^E6-22 (MT1170) contactin1b^E6-4 (MT1171) Nagoya (WS3) HNI-I (IB177) Kaga (IB833)