Enhanced Anti-influenza Agents Conjugated with Anti-inflammatory Activity
作者:Kung-Cheng Liu、Jim-Min Fang、Jia-Tsrong Jan、Ting-Jen R. Cheng、Shi-Yun Wang、Shi-Ting Yang、Yih-Shyun E. Cheng、Chi-Huey Wong
DOI:10.1021/jm3009844
日期:2012.10.11
Influenza therapy with a single targeted compound is often limited in efficacy due to the rapidly developed drug resistance. Moreover, the uncontrolled virus-induced cytokines could cause the high mortality of human infected by H5N1 avian influenza virus. In this study, we explored the novel dual-targeted bifunctional anti-influenza drugs formed by conjugation with anti-inflammatory agents. In particular, the caffeic acid (CA)-bearing zanamivir (ZA) conjugates ZA-7-CA (1) and ZA-7-CA-amide (7) showed simultaneous inhibition of influenza virus neuraminidase and suppression of pro-inflammatory cytokines. These ZA conjugates provided remarkable protection of cells and mice against influenza infections. Intranasal administration of low dosage (<1.2 mu mol/kg/day) of ZA conjugates exhibited much greater effect than the combination therapy with ZA and the anti-inflammatory agents in protection of the lethally infected mice by H1N1 or H5N1 influenza viruses.
Intramolecular ion-pair prodrugs of zanamivir and guanidino-oseltamivir
作者:Kung-Cheng Liu、Pei-Shan Lee、Shi-Yun Wang、Yih-Shyun E. Cheng、Jim-Min Fang、Chi-Huey Wong
DOI:10.1016/j.bmc.2011.06.080
日期:2011.8
Zanamivir (ZA) is a potent anti-influenza drug, but it cannot be administrated orally because of the hydrophilic carboxylate and guanidinium groups. Guanidino-oseltamivir (GO) is another effective neuraminidase inhibitor with polar guanidinium group under physiological conditions. The ester prodrugs ZA-HNAP (5) and GO-HNAP (6) were prepared to incorporate a 1-hydroxy-2-naphthoic (HNAP) moiety to attain good lipophilicity in the intramolecular ion-pairing forms. ZA-HNAP resumed high anti-influenza activity (EC(50) = 48 nM), in cell-based anti-influenza assays, by releasing zanamivir along with nontoxic HNAP. Under similar conditions, the hydrolysis of the GO-HNAP ester was too sluggish to show the desired anti-influenza activity. (C) 2011 Elsevier Ltd. All rights reserved.