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CNIO study chosen as discovery of the year in regenerative medicine

The prestigious journal Nature Medicine has taken a look at the year and chosen one of the Spanish National Cancer Research Centre's (CNIO) studies as the most important in the stem cell category for its special December edition. The edition highlights eight categories, including, as well as stem cells, immunology, cardiovascular disease or neuroscience.

The study in question, led by Manuel Serrano, the director of CNIO's Molecular Oncology Programme, was published last September in the journal Nature with the title Reprogramming in vivo produces teratomas and iPSCs with totipotency features (

The most important milestone achieved by the research was demostrating that cells from a variety of tissues, such as that of intestine, stomach, kidney or pancreas, can be turned into embryonic stem cells. To do so, CNIO researchers used the technique developed by the scientist Shinya Yamanaka (2012 Nobel Prize for Medicine) to obtain embryonic stem cells in vitro.

"Being able to apply this technique directly to tissues from living organisms was a big surprise, as it was thought in vivo conditions would not allow for this extent of cellular plasticity", says Serrano.

The journal Nature Medicine highlights that: "The significance of this work goes beyond the generation of a mouse with reprogrammable tissue", adding that "stem cells created in vivo reached a totipotent-like state and a plasticity that surpasses that of embryonic stem cells and other iPSCs made in a dish".

In this context, the cells obtained in Serrano's laboratory were even capable of forming pseudo-embryonic structures and extra-embryonic tissues such as the yolk sac.

The researchers emphasise that practical applications might yet be some way off, but admit it could change the direction of stem cell research and its applications for regenerative medicine and tissue engineering.

"The in vivo reprogramming achieved this year may bring researchers one step closer to protocols that can accomplish controlled tissue reprogramming", says the journal in its conclusion on CNIO's work.


Contact: Nuria Noriega
Centro Nacional de Investigaciones Oncologicas (CNIO)

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