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Japanese researchers report on liver transplantation studies using animal and iPS cells
Date:10/18/2010

Tampa, Fla. (October 18, 2010) Two research teams from the Okayama University Graduate School of Medicine (Okayama, Japan) have reported breakthrough studies in liver cell transplantation. One team found that the technical breakthrough in creating induced pluripotent stem cells (iPS) from mouse somatic cells (nonsex cells) in vitro had "implications for overcoming immunological rejection." Whereas a second team using liver cell xenotransplantation - transplanting cells of one species into another (in this case transplanting pig liver cells into mice) - found that transplanted liver cells from widely divergent species can function to correct acute liver failure and prolong survival.

Their studies, published in the current issue of Cell Transplantation (19:6/7), are freely available on-line at http://www.ingentaconnect.com/content/cog/ct/

Somatic cells differentiate into hepatocyte-like cells

A research team at the Okayama University Graduate School of Medicine, working with colleagues at the University of Pittsburgh School of Medicine found that mouse induced pluripotent stem (iPS) cells are pluripotent (able to differentiate into many varieties of stem cells) and able to proliferate in vitro without limits and could be cultured to become hepatocyte-like cells.

According to the researchers, a major limitation for cell-based therapies to treat liver diseases is the shortage of cell donors. Rejection is still an issue and chronic immunosuppression is required for allotransplantation (cells from nonidentical donors), making patient-derived cells, especially somatic cells (non-sex cells) attractive for transplantation.

"The ability to make iPS cells from somatic cells has implications for overcoming both immunological rejection and ethical issues associated with embryonic stem cells," said corresponding author Dr. Masaya Iwamuro. "Our study will be an important
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Contact: David Eve
celltransplantation@gmail.com
Cell Transplantation Center of Excellence for Aging and Brain Repair
Source:Eurekalert

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