RESUMENLa vía de señalización Notch se caracteriza por mediar la comunicación célula-célula, regulando diferentes procesos celulares como proliferación, apoptosis y definición del destino celular. Esta vía ha sido implicada en el desarrollo de estructuras craneofaciales como paladar, diente y bóveda craneal. El objetivo de esta investigación fue identificar los patrones de expresión de los genes componentes de la vía Notch, Serrate1 y Notch1, durante el desarrollo del tercio medio facial. Se utilizaron embriones de pollo (Gallus gallus) seleccionados de acuerdo a los criterios de Hamilton y Hamburger y sobre los cuales se realizó hibridación in situ con ribosondas marcadas con Digoxigenina (DIG), para luego ser detectadas con anticuerpos Anti-Dig. Los resultados mostraron expresión de los genes evaluados, en las prominencias maxilares (pmx) y frontonasal (pfn) durante el desarrollo del tercio medio facial. Estos resultados sugieren una probable participación de la vía Notch a través de estos genes, en los diferentes procesos celulares que determinan la morfogénesis y el desarrollo del tercio medio facial.Palabras clave: desarrollo facial, Notch1, prominencia frontonasal, prominencias maxilares, Serrate1, vía de señalización Notch. ABSTRACTThe Notch signaling pathway is characterized by mediate cell-cell communication, regulating different cellular processes as proliferation, apoptosis and cell fate definition. This pathway has been implicated in craniofacial structures development as palate, teeth and cranial vault. The objective of this research was to identify the genes expression patterns of some Notch signaling pathway components, Serrate1 and Notch1, during the midface development. It was used chicken embryos (Gallus gallus) selected according to Hamilton and Hamburger criteria. We performed in situ hybridization with Digoxigenin (DIG)-labeled riboprobes and detected with the antibody Anti-Dig. The results showed the expression of the evaluated genes in the maxillary (pmx) and frontonasal (pfn) prominences during the midface development. These results suggest a probable involvement of the Notch pathway through these genes in different cellular processes that determine midface morphogenesis and development.
Ambystoma mexicanum is a urodele amphibian endemic to Xochimilco Lake in Mexico, it belongs to the salamander family Ambystomatidae. This species has frequently been used as model organism in developmental biology and regeneration laboratories around the world due to its broad regenerative capacities and adaptability to laboratory conditions. In this review we describe the establishment of the first colony of axolotls in Colombia to study tissue regeneration and our perspectives on the use A. mexicanum as a model organism in Colombia are discussed emphasizing its possible uses in regeneration and developmental biology
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