Journal of Medicinal Chemistry p. 2916 - 2927 (2019)
Update date:2022-08-11
Topics:
Dedaki, Christina
Kokotou, Maroula G.
Mouchlis, Varnavas D.
Limnios, Dimitris
Lei, Xiaoyong
Mu, Carol T.
Ramanadham, Sasanka
Magrioti, Victoria
Dennis, Edward A.
Kokotos, George
Ca2+-independent phospholipase A2 (GVIA iPLA2) has gained increasing interest recently as it has been recognized as a participant in biological processes underlying diabetes development and autoimmune-based neurological disorders. The development of potent GVIA iPLA2 inhibitors is of great importance because only a few have been reported so far. We present a novel class of GVIA iPLA2 inhibitors based on the β-lactone ring. This functionality in combination with a four-carbon chain carrying a phenyl group at position-3 and a linear propyl group at position-4 of the lactone ring confers excellent potency. trans-3-(4-Phenylbutyl)-4-propyloxetan-2-one (GK563) was identified as being the most potent GVIA iPLA2 inhibitor ever reported (XI(50) 0.0000021, IC50 1 nM) and also one that is 22 000 times more active against GVIA iPLA2 than GIVA cPLA2. It was found to reduce β-cell apoptosis induced by proinflammatory cytokines, raising the possibility that it can be beneficial in countering autoimmune diseases, such as type 1 diabetes.
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