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The Shh/Gli3 gene regulatory network precedes the origin of paired fins and reveals the deep homology between distal fins and digits.
Letelier, Joaquín; Naranjo, Silvia; Sospedra-Arrufat, Ismael; Martinez-Morales, Juan Ramón; Lopez-Rios, Javier; Shubin, Neil; Gómez-Skarmeta, José Luis.
Afiliação
  • Letelier J; Centro Andaluz de Biología del Desarrollo, Consejo Superior de Investigaciones Científicas, Universidad Pablo de Olavide, and Junta de Andalucía, Sevilla 41013, Spain.
  • Naranjo S; Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile.
  • Sospedra-Arrufat I; Centro Andaluz de Biología del Desarrollo, Consejo Superior de Investigaciones Científicas, Universidad Pablo de Olavide, and Junta de Andalucía, Sevilla 41013, Spain.
  • Martinez-Morales JR; Centro Andaluz de Biología del Desarrollo, Consejo Superior de Investigaciones Científicas, Universidad Pablo de Olavide, and Junta de Andalucía, Sevilla 41013, Spain.
  • Lopez-Rios J; Centro Andaluz de Biología del Desarrollo, Consejo Superior de Investigaciones Científicas, Universidad Pablo de Olavide, and Junta de Andalucía, Sevilla 41013, Spain.
  • Shubin N; Centro Andaluz de Biología del Desarrollo, Consejo Superior de Investigaciones Científicas, Universidad Pablo de Olavide, and Junta de Andalucía, Sevilla 41013, Spain; jloprio@upo.es nshubin@uchicago.edu.
  • Gómez-Skarmeta JL; Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637 jloprio@upo.es nshubin@uchicago.edu.
Proc Natl Acad Sci U S A ; 118(46)2021 11 16.
Article em En | MEDLINE | ID: mdl-34750251
One of the central problems of vertebrate evolution is understanding the relationship among the distal portions of fins and limbs. Lacking comparable morphological markers of these regions in fish and tetrapods, these relationships have remained uncertain for the past century and a half. Here we show that Gli3 functions in controlling the proliferative expansion of distal progenitors are shared among dorsal and paired fins as well as tetrapod limbs. Mutant knockout gli3 fins in medaka (Oryzias latipes) form multiple radials and rays, in a pattern reminiscent of the polydactyly observed in Gli3-null mutant mice. In limbs, Gli3 controls both anterior-posterior patterning and cell proliferation, two processes that can be genetically uncoupled. In situ hybridization, quantification of proliferation markers, and analysis of regulatory regions reveal that in paired and dorsal fins, gli3 plays a main role in controlling proliferation but not in patterning. Moreover, gli3 down-regulation in shh mutant fins rescues fin loss in a manner similar to how Gli3 deficiency restores digits in the limbs of Shh mutant mouse embryos. We hypothesize that the Gli3/Shh gene pathway preceded the origin of paired appendages and was originally involved in modulating cell proliferation. Accordingly, the distal regions of dorsal fins, paired fins, and limbs retain a deep regulatory and functional homology that predates the origin of paired appendages.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Oryzias / Redes Reguladoras de Genes / Nadadeiras de Animais / Proteína Gli3 com Dedos de Zinco / Proteínas do Tecido Nervoso Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Oryzias / Redes Reguladoras de Genes / Nadadeiras de Animais / Proteína Gli3 com Dedos de Zinco / Proteínas do Tecido Nervoso Idioma: En Ano de publicação: 2021 Tipo de documento: Article