Discovery of Orally Bioavailable and Brain-Penetrable Prodrugs of the Potent nSMase2 Inhibitor DPTIP.
Discovery of Orally Bioavailable and Brain-Penetrable Prodrugs of the Potent nSMase2 Inhibitor DPTIP.
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DOI:
10.1021/acs.jmedchem.2c00562
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发表时间:
2022-08-25
影响因子:
7.3
通讯作者:
Rais, Rana
中科院分区:
文献类型:
--
作者:
Pal, Arindom;Gori, Sadakatali;Yoo, Seung-wan;Thomas, Ajit G.;Wu, Ying;Friedman, Jacob;Tenora, Lukas;Bhasin, Harshit;Alt, Jesse;Haughey, Norman;Slusher, Barbara S.;Rais, Rana
Extracellular vesicles (EVs) can carry pathological cargo and play an active role in disease progression. Neutral Sphingomyelinase-2 (nSMase2) is a critical regulator of EV biogenesis, and its inhibition has shown protective effects in multiple disease states. 2,6-Dimethoxy-4-(5-phenyl-4-thiophen-2-yl-1H-imidazol-2-yl)-phenol (DPTIP) is one of the most potent (IC50=30 nM) inhibitor of nSMase2 discovered to-date. However, DPTIP exhibits poor oral pharmacokinetics (PK), limiting its clinical development. To overcome DPTIP’s PK limitations, we synthesized a series of prodrugs by masking its phenolic hydroxyl group. When administered orally, the best prodrug (P18) with a 2’,6’-diethyl-1,4’-bipiperidinyl-promoiety exhibited >4-fold higher plasma (AUC0-t=1047 pmol.h/mL) and brain exposures (AUC0-t=247 pmol.h/g) versus DPTIP; and a significant enhancement of DPTIP half-life (2 h vs. ~0.5 h). In a mouse model of acute brain injury, DPTIP released from P18 significantly inhibited IL-1β-induced EV release into plasma and attenuated nSMase2 activity. These studies report the discovery of a DPTIP-prodrug with potential for clinical translation.
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影响因子:
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