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Anti-AIDS agents 65: investigation of the in vitro oxidative metabolism of 3',4'-Di-O-(-)-camphanoyl-(+)-cis-khellactone derivatives as potent anti-hiv agents. 2005

Madoka Suzuki, and Yutai Li, and Philip C Smith, and James A Swenberg, and David E Martin, and Susan L Morris-Natschke, and Kuo-Hsiung Lee
Division of Medicinal Chemistry, School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599-7360, USA.

3',4'-Di-O-(-)-camphanoyl-(+)-cis-khellactone (DCK) is a synthetic khellactone ester that exhibits potent in vitro anti-human immunodeficiency virus (HIV) activity with a mechanism distinct from clinically used anti-HIV agents. Several series of mono- and di-substituted DCK derivatives (DCKs) have previously been synthesized, and their structure-activity relationships are well established. To optimize DCK as a drug lead and to guide further structural modifications, metabolic stabilities and metabolite structures were analyzed. In vitro metabolic stabilities of DCKs in human liver microsomes were assessed using high performance liquid chromatography (HPLC) with UV detection to establish structure-metabolism relationships (SMRs). HPLC coupled with ion trap mass spectrometry was used to identify the metabolite structures. The results indicated that DCKs undergo rapid oxidation on the lipophilic camphanoyl moieties and the substituents on the khellactone do not alter the rate or the metabolic pathways for this compound type. Our SMR and metabolite analysis study suggested that the two camphanoyl ester moieties are the determinants of the low metabolic stability and that structural alteration in the two esters may be necessary to improve metabolic profiles of DCKs.

UI MeSH Term Description Entries
D007783 Lactones Cyclic esters of hydroxy carboxylic acids, containing a 1-oxacycloalkan-2-one structure. Large cyclic lactones of over a dozen atoms are MACROLIDES. Lactone
D008862 Microsomes, Liver Closed vesicles of fragmented endoplasmic reticulum created when liver cells or tissue are disrupted by homogenization. They may be smooth or rough. Liver Microsomes,Liver Microsome,Microsome, Liver
D010084 Oxidation-Reduction A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471). Redox,Oxidation Reduction
D002164 Camphor A bicyclic monoterpene ketone found widely in plants, especially CINNAMOMUM CAMPHORA. It is used topically as a skin antipruritic and as an anti-infective agent. Camphor, (+-)-Isomer,Camphor, (1R)-Isomer,Camphor, (1S)-Isomer
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013058 Mass Spectrometry An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers. Mass Spectroscopy,Spectrometry, Mass,Spectroscopy, Mass,Spectrum Analysis, Mass,Analysis, Mass Spectrum,Mass Spectrum Analysis,Analyses, Mass Spectrum,Mass Spectrum Analyses,Spectrum Analyses, Mass
D013329 Structure-Activity Relationship The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups. Relationship, Structure-Activity,Relationships, Structure-Activity,Structure Activity Relationship,Structure-Activity Relationships
D019380 Anti-HIV Agents Agents used to treat AIDS and/or stop the spread of the HIV infection. These do not include drugs used to treat symptoms or opportunistic infections associated with AIDS. AIDS Drug,AIDS Drugs,Anti-AIDS Agents,Anti-AIDS Drug,Anti-HIV Agent,Anti-HIV Drug,Anti-AIDS Drugs,Anti-HIV Drugs,Agent, Anti-HIV,Agents, Anti-AIDS,Agents, Anti-HIV,Anti AIDS Agents,Anti AIDS Drug,Anti AIDS Drugs,Anti HIV Agent,Anti HIV Agents,Anti HIV Drug,Anti HIV Drugs,Drug, AIDS,Drug, Anti-AIDS,Drug, Anti-HIV,Drugs, AIDS,Drugs, Anti-AIDS,Drugs, Anti-HIV

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