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US Scientists Restore Vision in Blind Rats

US Scientists Restore Vision in Blind Rats
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US Scientists Restore Vision in Blind Rats

US Scientists Restore Vision in Blind Rats

US scientists have found that neural cells located in the vision centers in the brains of blind rats, resumed their functions normally after the transplant of fetal retina cells that led to vision restoration.

Researchers at the University of California, Irvine School of Medicine, who published their study in the Journal of Neuroscience, indicated that the resumed function of neural cells led to vision restoration.

David Lyon, associate professor of Anatomy & Neurobiology at the UCI School of Medicine, and the study lead author, said that his team observed detailed responses from the visual cortex generated after the retinal sheet transplants in rats suffering from severe macular degeneration.

The retinal sheet derived from the transplanted fetal cells tightened and integrated with the retina, and managed to generate a visual activity in the brains of the blind rats.

According to Lyon, it's been known so far that the integration of transplanted sheets with the retina allows light detection, but, what wasn't known is that the vision centers in the brain resume their function due to this integration.

Lyon said the study showed that the resumed function of the blind rats' neural cells was similar to that of normal rats, and that these findings may help in treating macular degeneration in humans.

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Finland Zoo to Return Giant Pandas to China because they're Too Expensive to Keep

FILE - Female panda Jin Bao Bao, named Lumi in Finnish, plays in the snow on the opening day of the Snowpanda Resort in Ahtari Zoo, in Ahtari, Finland, Saturday Feb. 17, 2018. (Roni Rekomaa/Lehtikuva via AP), File)
FILE - Female panda Jin Bao Bao, named Lumi in Finnish, plays in the snow on the opening day of the Snowpanda Resort in Ahtari Zoo, in Ahtari, Finland, Saturday Feb. 17, 2018. (Roni Rekomaa/Lehtikuva via AP), File)
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Finland Zoo to Return Giant Pandas to China because they're Too Expensive to Keep

FILE - Female panda Jin Bao Bao, named Lumi in Finnish, plays in the snow on the opening day of the Snowpanda Resort in Ahtari Zoo, in Ahtari, Finland, Saturday Feb. 17, 2018. (Roni Rekomaa/Lehtikuva via AP), File)
FILE - Female panda Jin Bao Bao, named Lumi in Finnish, plays in the snow on the opening day of the Snowpanda Resort in Ahtari Zoo, in Ahtari, Finland, Saturday Feb. 17, 2018. (Roni Rekomaa/Lehtikuva via AP), File)

A zoo in Finland has agreed with Chinese authorities to return two loaned giant pandas to China more than eight years ahead of schedule because they have become too expensive for the facility to maintain amid declining visitors.
The private Ähtäri Zoo in central Finland some 330 kilometers north of Helsinki said Wednesday on its Facebook page that the female panda Lumi, Finnish for “snow,” and the male panda Pyry, meaning “snowfall,” will return “prematurely” to China later this year, The Associated Press reported.
The panda pair was China’s gift to mark the Nordic nation’s 100 years of independence in 2017, and they were supposed to be on loan until 2033.
But since then the zoo has experienced a number of challenges, including a decline in visitors due to the 2020 coronavirus pandemic and the conflict between Russia and Ukraine, as well as an increase in inflation and interest rates, the facility said in a statement.
The panda deal between Helsinki and Beijing, a 15-year loan agreement, had been finalized in April 2017 when Chinese President Xi Jinping visited Finland for talks with Finland's then-President Sauli Niinistö. The pandas arrived in Finland in January 2018.
The Ähtäri Zoo, which specializes in typical northern European animals such as bears, lynxes and wolverines, built a special panda annex at a cost of some 8 million euros ($9 million) in hopes of luring more tourists to the remote nature reserve.
The upkeep of Lumi and Pyry, including a preservation fee to China, cost the zoo some 1.5 million euros annually. The bamboo that giant pandas eat was flown in from the Netherlands.
The Chinese Embassy in Helsinki noted to Finnish media that Beijing had tried to help Ähtäri to solve its financial difficulties by, among things, urging Chinese companies operating in Finland to make donations to the zoo and supporting its debt arrangements.
However, declining visitor numbers combined with drastic changes in the economic environment proved too high a burden for the smallish Finnish zoo. The panda pair will enter into a monthlong quarantine in late October before being shipped to China.
Finland, a country of 5.6 million, was among the first Western nations to establish political ties with China, doing so in 1950. China has presented giant pandas to countries as a sign of goodwill and closer political ties, and Finland was the first Nordic nation to receive them.