Azione dell'«Epidermal Growth Factor» sulla sintesi di acidi nucleici e proteine dell'epitelio cutaneo

Summary The biological effect has been investigated of a specific protein with a growth-stimulating activity on epidermal cells.Injection of minute amounts of this factor (EGF) into newborn rats produces hyperplasia of the epidermis with a marked increase in the protein and nucleic acid content per unit of skin area. The activity of a number of epidermal enzymes per unit area is also increased by the epidermal growth factor.

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Il presente lavoro è stato realizzato con fondi del NIH e della Merck Sharp-Dohme Co.     

High altitude influence on the level and turn-over time of cardiac norepinephrine in rats

Summary In rats exposed to an altitude, of 2,900 meters the level of endogenous cardiac norepinephrine decreases after the 5th day of exposure. The turner-over time of the amine proceeds in 3 steps which are probablyrelated to periods of stress and adaptation: initial increase, important decrease from the 5th day and return to a normal value from the 12 th day.     

In vivo generation of hydrogen peroxide from 6-hydroxydopamine

Zusammenfassung Es gelang, die Erythrocytenkatalase der Maus durch Injektion von 6-Hydroxydopamin und in Gegenwart von 3-Amino-1,2,4-triazol zu hemmen, was auf die Wasserstoffperoxyd-Entwicklung hinweist und mit der Rolle des H₂O₂ bei der Degeneration der Nervenenden durch 6-Hydroxydopamin in Einklang steht.