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Januvia and Galvus are the leaders of a new class of medicines called DPP-4 inhibitors, which block an enzyme (dipeptyl peptidase 4).
FORBES: Magazine Article
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Merck in 2000 entered into a deal with the tiny German firm Probiodrug that was pursuing a drug to block the peptidase enzyme.
FORBES: Health
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It was not until the mid-1990s that researchers saw another way: An enzyme called dipeptidyl peptidase four (DPP4) broke down GLP, and by inhibiting it, researchers could boost GLP levels in the body.
FORBES: Merck Starts Diabetes Race
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In 1995 he and colleague Carolyn Deacon proved that the obscure dipeptidyl peptidase enzyme was the main culprit and in a paper published in the journal Diabetes suggested that drugs that blocked this enzyme would make good treatments.
FORBES: Fat City