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London: Injecting a protein into the brain could protect its nerve cells from prion disease, a condition which causes the brain to wither away, says a new study. Because the process by which prion disease affects mice brains is similar to some degenerative brain conditions in humans, scientists are hoping that the findings could be a breakthrough in the treatment of Alzheimer’s or Parkinson’s. In each case, brain cell death is linked to the build-up of misshapen proteins, forming plaques in the brains of Alzheimer’s sufferers and lewy bodies in the nerve cells of those with Parkinson’s, the journal Nature reports. In the mice with prion disease, researchers found that when the faulty proteins begin to accumulate, their cells activated a defence mechanism which halted the production of such proteins, according to the Telegraph. The halt ought to be temporary, but in the diseased mice the production of proteins, crucial to cell survival, did not start up again. Scientists found that by injecting a different protein, which prevents the supply from being “switched off”, they could protect the mice’s brain cells for longer and extend their lives. Giovanna Mallucci, professor at Leicester University, who led the research, said that it could provide a “way forward in how we treat other disorders.” Roger Morris, professor at the School of Biomedical Sciences at King’s College London, described the findings as a “major breakthrough” and said there were “good reasons” for thinking it could also apply to Alzheimer’s. But Eric Karran, of Alzheimer’s Research UK, warned that the research on the prion protein was in its “early stages” and added: “We would need to see the same results confirmed in Alzheimer’s and Parkinson’s to really strengthen the evidence.” [Source: IANS]
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ZAGREB - Znanstvenici su ponovno pomaknuli granicu medicine, ovaj put na području istraživanja Alzheimerove bolesti. Kako piše Telegraph, tim znanstvenika je ubrizgao specifičan protein u mozak miševa zaraženih prionskom bolešću i na taj način zaustavili tijelo da ubija vlastite moždane stanice. Proces u kojem prion, čestica manja od virusa i odgovorna za nastanak mnogih degenerativnih bolesti, napada mozak miša sličan je procesu u kojem napada ljudski mozak. Stoga, znanstvenici se nadaju da će uskoro nastupiti revolucija u liječenju Alzheimerove ili čak Parkinsonove bolesti. No tu priči nije kraj. Prvotna očekivanja bila su da će protein privremeno zaustaviti napredak bolesti kod miša, no bolest nije dalje napredovala. Prof. Giovanna Mallucci, voditeljica istraživanja, nada se kako bi otkriće moglo poslužiti i za liječenje drugih medicinskih stanja. No nisu svi podijelili oduševljenje znanstvenog tima. Eric Karran iz Centra za istraživanje Alzheimera Ujedinjenog Kraljevstva skeptičan je prema prvim rezultatima, te navodi da se ona moraju potvrditi i u Alzheimera i u Parkinsona kako bi doista pružila jak dokaz, prenosi The Telegraph. Podsjetimo, Alzheimerova bolest je teški degenerativni poremećaj koji vodi do demencije, gubitka pamćenja, poremećaja mišljenja, ličnost i ponašanja. Danas je još neizlječiva i može uzrokovati smrt.