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World first: Chinese scientists create pig stem cells
Date:6/2/2009

m and ectoderm a quality that all embryonic stem cells have. The information gained from successfully inducing pluripotent stem cells (iPS cells) means that it will be much easier for researchers to go on to develop embryonic stem cells (ES cells) that originate from pig or other ungulate embryos.

Dr Xiao said: "Pig pluripotent stem cells would be useful in a number of ways, such as precisely engineering transgenic animals for organ transplantation therapies. The pig species is significantly similar to humans in its form and function, and the organ dimensions are largely similar to human organs. We could use embryonic stem cells or induced stem cells to modify the immune-related genes in the pig to make the pig organ compatible to the human immune system. Then we could use these pigs as organ donors to provide organs for patients that won't trigger an adverse reaction from the patient's own immune system.

"Pig pluripotent stem cell lines could also be used to create models for human genetic diseases. Many human diseases, such as diabetes, are caused by a disorder of gene expression. We could modify the pig gene in the stem cells and generate pigs carrying the same gene disorder so that they would have a similar syndrome to that seen in human patients. Then it would be possible to use the pig model to develop therapies to treat the disease.

"To combat swine flu, for instance, we could make a precise, gene-modified pig to improve the animal's resistance to the disease. We would do this by first, finding a gene that has anti-swine flu activity, or inhibits the proliferation of the swine flu virus; second, we can introduce this gene to the pig via pluripotent stem cells a process known as gene 'knock-in'. Alternatively, because the swine flu virus needs to bind with a receptor on the cell membrane of the pig to enter the cells and proliferate, we could knock out this receptor in the pig via gene targeting in the pig induced pluripotent stem
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Contact: Emma Mason
wordmason@mac.com
44-077-112-96986
Oxford University Press
Source:Eurekalert

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