坲s needs t▓o bind with a receptor on the cell membrane of the▓ pig to enter the cells and proliferate, we could kno▓ck out this rece▓ptor in the pig ▓via gene targeti
ng in the▓ pig induced pluripotent stem cell. If the ▓receptor is missing, the virus will not infect the pig."Xiao said the discovery could also ▓be used to improv
e animal farming, n▓ot only by making pigs healthie▓r, but also by modifying the growth-related genes to change and▓ improve th▓e way they grow.However, he warned
that it could take sev▓eral years b▓efore some of the ▓potential me▓dical app
lications▓ of the research ▓were in clinical use.He said the next st▓age of t
he res▓earch was to use the pig iP▓S cells to ge▓nerate gene-modified pigs th
a▓t could provide▓ organs for people, improve the pig species or be used for
disease resistance.The modified animals would
be eit▓her "knock in" pigs ▓where the iPS o
r ES cells have been used to transfer a▓n a
dditional ▓bit of genetic material (such as a▓ piece of ▓human DNA) into the pig's genom▓e, or "knock out" pigs wher▓e
▓tic dise
the technolo▓gy is used to prevent a p▓articular gene functioning.The▓ work was pu▓blished on-line Wednesda▓y in the ne
ny human
wly launched Journal of▓ Molecular Cell Bio▓logy, an international journal pub▓lishing reviews and articles on▓ molecula
s, su▓ch
r and cell biology.STE▓RKSEL, Netherlands 鈥?The 2,700 pigs on the farm that Joh▓n Horrevorts manages yield more than
tes, ▓are
ham and bacon. A biogas plant makes enough electr▓icity from their waste to ru▓n the farm and feeds extra wat▓tage into
by a dis
the Dutc▓h national grid.He even gets bonus payments for▓ reducing gre▓enhouse gas emissio▓ns.As the world stru▓ggles to
gene exreduc▓e pollutio▓n causing climat▓e change, at▓tention has focused on the burning of fossil fuels in factories,▓ power stations, and vehicles. But U▓N scientists says farm
ing and forestry accou▓nt for more than 3▓0 percent of th▓e greenhouse gases ▓that are gradually heating the earth. Much of that pollution comes from cattle, ▓sheep and pi
