title: Hydrazones of 2-aryl-quinoline-4-carboxylic acid hydrazides: synthesis and preliminary evaluation as antimicrobial agents.
abstract: A new series of 2-arylquinoline-4-carboxylic acid hydrazide-hydrazones was synthesized using an appropriate synthetic route. All the target compounds were evaluated for their in vitro antimicrobial activity against Staphylococcus aureus as an example for Gram-positive bacteria, Escherichia coli as an example for Gram-negative bacteria, and Candida albicans as a representative of fungi. The minimum inhibitory concentration (MIC) was determined for test compounds as well as for reference standards. Among the compounds tested, compounds having nitro substituents at the arylidene moiety showed the most potent antifungal as well as antibacterial activities against E. coli. Compound 23 displayed an antifungal activity comparable to that of nystatin. However, none of the compounds demonstrated any antibacterial activity against S. aureus. Hydrophobicity of the target compounds correlated weakly with their antibacterial and antifungal activities. The most potent compounds namely, 7, 18, 19, 22, and 23 were assessed for hemolytic toxicity and found to be non-hemolytic up to a concentration of 100mug/mL. In addition, the most potent compound (23) was evaluated for in vitro cytotoxic activity against various cancer cell lines. This compound was found to display no cytotoxic activity but rather it induces the proliferation rate of Hep-G2 cells.
authors.affiliation: Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt. kametwally@hotmail.com
authors.forename: Kamel A
authors.initials: KA
authors.lastname: Metwally
authors.forename: Lobna M
authors.initials: LM
authors.lastname: Abdel-Aziz
authors.forename: El-Sayed M
authors.initials: el-SM
authors.lastname: Lashine
authors.forename: Mohamed I
authors.initials: MI
authors.lastname: Husseiny
authors.forename: Rania H
authors.initials: RH
authors.lastname: Badawy
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000935:Antifungal Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D001943:Breast Neoplasms / Q000188:drug therapy; D002176:Candida albicans / Q000187:drug effects; D002264:Carboxylic Acids / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy; D049109:Cell Proliferation / Q000187:drug effects; D004926:Escherichia coli / Q000187:drug effects; D006461:Hemolysis / Q000187:drug effects; D006801:Humans; D006835:Hydrazones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D008113:Liver Neoplasms / Q000188:drug therapy; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D015363:Quinolones / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D013211:Staphylococcus aureus / Q000187:drug effects; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D000970:Antineoplastic Agents; D002264:Carboxylic Acids; D006835:Hydrazones; D015363:Quinolones