Domingo, 25 Junio, 2017

Células madres fueron transformadas en células sanguíneas primordiales

Crearon células madre de la sangre en laboratorio Logran generar células precursoras de la sangre en placa de cultivo
Danilo Martir | 19 May, 2017, 20:46

Dos equipos de investigadores de Estados Unidos y Reino Unido obtuvieron glóbulos rojo o células de sangre a partir de células madre hematopoyéticas (HSCs), de acuerdo a dos artículos científicos publicado en la revista Nature de esta semana. Este trabajo ofrece esperanza a las personas con leucemia y otros trastornos de la sangre que necesitan trasplantes de médula ósea, pero en los que no es posible encontrar un donante compatible. Los pacientes podrían recibir versiones cultivadas en laboratorio de sus propias células sanas. "Este trabajo es la culminación de más de 20 años de lucha", explicó George Daley, director de un laboratorio de investigación en el Programa de Células Madre del Hospital Infantil de Boston (EE UU).

Con 5 factores de transcripción clave, consiguieron crear las células madre de la sangre. Alteraron los niveles de los factores de transcripción para impulsar su transición a células madre de sangre, que se formaron en una capa de células endoteliales fetales para confirmar sus propiedades.

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Trump himself had already contradicted that explanation, telling interviewers earlier that he had already chose to dismiss Comey. Comey, some Democrats renewed talk that impeachment of the president could be in the works for potential obstruction of justice.

"Ahora podemos mostrar la función de la sangre humana en los 'ratones humanizados'". Esto permitirá fabricar un abastecimiento ilimitado de células madre de la sangre extraídas de las células de donantes universales. "Esto podría aumentar el suministro de sangre para los pacientes que necesitan transfusiones", aclaran los autores.

Este paso abre una oportunidad para "crear células de la sangre funcionales" para combatir enfermedades genéticas de la sangre, ha señalado en un comunicado Ryohichi Sugimura, principal firmante del trabajo y uno de los investigadores del equipo de Daley.

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Farron's party have based their whole campaign nearly exclusively on being the only party that will fight "hard" Brexit. Labour has "lost the right to call themselves the opposition" by failing to make a stand on Brexit, Mr Farron said.

La mayoría de investigaciones en el pasado habían concluido que una sola célula madre hematopoyética (generadora) puede brindar una gran variedad de linfocitos, las cuales recorren nuestras venas y por las que sobrevivimos a virus y bacterias.

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Macri destacó además que hay "muchísima vocación de profundizar la asociación estratégica integral " entre Argentina y China . Finalmente, entre los documentos firmados figura un memorando de entendimiento para la cooperación en fútbol.

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