Depozitele de proteine amiloide din creier, unul dintre cele două semne ale bolii Alzheimer, au fost găsite în mod curios la autopsia unor persoane relativ tinere care au murit de maladia Creutzfeldt-Jakob după ce fuseseră contaminate în urma unui tratament făcut mai de demult cu hormoni de creștere.
Într-un studiu publicat miercuri în revista ‘Nature’, profesorul Collinge formulează ipoteza unei duble infecții la aceste persoane pe baza prelevărilor din glanda hipofiză de la cadavre. Aceste injecții au fost la un moment dat purtătoare de ‘prioni’, proteine cerebrale, care, într-o formă modificată, pot cauza o infecție a creierului, și de proteine amiloide care ar fi condus la depozitele din creier, indicator pentru maladia Alzheimer.
Totuși sunt specialiști care au contrazis această ipoteză. În cazul în care această teorie se dovedește corectă, nu există nicio dovadă că acești oameni au dezvoltat cu adevărat maladia Alzheimer, afirmă cercetătorul. Ei au murit prematur de maladia Creutzfeldt-Jakob și s-a descoperit la autopsie că prezintă unul dintre cele două semne ale maladiei Alzheimer.
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