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Dintre toate bacteriile, cercetatorii germani au ales salmonella
tocmai pentru capacitatea ei de a supravietui in tesuturile in care
sangele ajunge cu greutate, cum sunt cele tumorale. Atunci cand
recunosc prezenta acestei bacterii, celulele imunitare produc
TNF-alfa, un „mesager” chimic care le alerteaza si pe celelalte
celule ale sistemului imunitar. Iar aceasta substanta, spun oamenii
de stiinta, chiar si prezenta in cantitati mici, este suficienta
pentru a inmuia peretii vaselor sanguine si a permite trecerea
sangelui in tesutul canceros. Pasul urmator este acela de a
modifica bacteria astfel incat sa migreze specific in tumora pentru
a o distruge.
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