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Transplanted Pancreatic Stem Cells Turn into Insulin Producing Cells in Mice Study

by Thilaka Ravi on September 27, 2012 at 4:39 PM
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Transplanted Pancreatic Stem Cells Turn into Insulin Producing Cells in Mice Study

Japanese researchers have offered a new hope to people with diabetes with their successful research on islet cell transplantation.

In a study to investigate how transplanted islet cells can differentiate and mature into insulin-producing pancreatic cells, the team found that using a specific set of transcription factors (proteins that bind to specific DNA sequences) could be transduced into mouse pancreatic stem cells (mPSCs) using Sendai virus (SeV), a mouse influenza virus, as a carrier, or vector.

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"Diabetes is one of the most serious and prevalent metabolic diseases," said study co-author Dr. Hiroshi Yukawa, Department of Advanced Medicine in Biotechnology and Robotics, Nagoya University Graduate School of Medicine.

"Islet cell transplantation has proven effective, however this strategy requires sufficient organ donors," he noted.

Given the shortage of donors, the researchers investigated factors that could impact on the expansion and differentiation of pancreatic stem cells (PSCs) into insulin-producing cells using combinations of varieties of transcription factors and the SeV mouse virus to carry the cells, thus increasing the number of functional islet cells available for transplantation.
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SeV vectors, said the researchers, are superior to conventional virus vectors because "they do not go through a DNA phase" and can introduce foreign genes without toxicity into a variety of cell types.

The combination of transcription factors that produced the greatest impact on the differentiation of PSCs into insulin cells was Pdx-1 (Pancreatic and duodenal homeobox 1), NeuroD (neurogenic differentiation) and MafA (musculoaponeurotic fibrosarcoma oncogene A).

"Our data suggest that the transduction of transcription factors using SeV vectors facilitates mPSCs differentiation into insulin producing cells and showed the possibility of regenerating B-cells by using transduced PSCs," the researchers concluded.

The study was published in a recent issue of Cell Medicine.

Source: ANI
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