In a screen for early developmental mutants of the zebrafish, we have identified mutations specifically affecting the internal organs, We identified 53 mutations affecting the cardiovascular system, Nine of them affect specific landmarks of heart morphogenesis. Mutations in four genes cause a failure in the fusion of the bilateral heart primordia, resulting in cardia bifida. In lonely atrium, no heart venticle is visible and the atrium is directly fused to the outflow tract. In the overlooped mutant, the relative position of the two heart chambers is distorted, The heart is enormously enlarged in the santa mutant, In two mutants, scotch tape and superglue, the cardiac jelly between the two layers of the heart is significantly reduced, We also identified a number of mutations affecting the function of the heart, The mutations affecting heart function can be subdivided into two groups, one affecting heart contraction and another affecting the rhythm of the heart beat. Among the contractility group of mutants are 5 with no heart beat at all and 15 with a reduced heart beat of one or both chambers, 6 mutations are in the rhythmicity group and specifically affect the beating pattern of the heart, Mutations in two genes, bypass and kurzschluss, cause specific defects in the circulatory system, In addition to the heart mutants, we identified 23 mutations affecting the integrity of the liver, the intestine or the kidney, In this report, we demonstrate that it is feasible to screen for genes specific for the patterning or function of certain internal organs in the zebrafish, The mutations presented here could serve as an entrypoint to the establishment of a genetic hierarchy underlying organogenesis.
We thank Chris Simpson and Colleen Boggs for excellent technical help. We thank Mark C. Fishman for the advice and providing fish for complementation; Bernadette Fouquet, Kerri S. Warren and Brant M. Weinstein for critically reading the manuscript. JNC is supported in part by NIH grant RO1-HL49579 to Mark C. Fishman.
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Chen J, Haffter P, Odenthal J, et al. Mutations affecting the cardiovascular system and other internal organs in zebrafish. Development. 1996;123:293-302. doi:10.1242/dev.123.1.293
Chen, J., Haffter, P., Odenthal, J., Vogelsang, E., Brand, M., Van Eeden, F., … Nüsslein Volhard, C. (1996). Mutations affecting the cardiovascular system and other internal organs in zebrafish. Development. Company of Biologists. https://doi.org/10.1242/dev.123.1.293
Chen, Jaunian, Pascal Haffter, Jörg Odenthal, Elisabeth Vogelsang, Michael Brand, Fredericus Van Eeden, Makoto Furutani Seiki, et al. “Mutations Affecting the Cardiovascular System and Other Internal Organs in Zebrafish.” Development. Company of Biologists, 1996. https://doi.org/10.1242/dev.123.1.293.
J. Chen et al., “Mutations affecting the cardiovascular system and other internal organs in zebrafish,” Development, vol. 123. Company of Biologists, pp. 293–302, 1996.
Chen J, Haffter P, Odenthal J, Vogelsang E, Brand M, Van Eeden F, Furutani Seiki M, Granato M, Hammerschmidt M, Heisenberg C-PJ, Jiang Y, Kane D, Kelsh R, Mullins M, Nüsslein Volhard C. 1996. Mutations affecting the cardiovascular system and other internal organs in zebrafish. Development. 123, 293–302.
Chen, Jaunian, et al. “Mutations Affecting the Cardiovascular System and Other Internal Organs in Zebrafish.” Development, vol. 123, Company of Biologists, 1996, pp. 293–302, doi:10.1242/dev.123.1.293.
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