In vitro antifungal evaluation and structure–activity relationships of a new series of chalcone derivatives and synthetic analogues, with inhibitory properties against polymers of the fungal cell wall
作者:Silvia N López、Marı́a V Castelli、Susana A Zacchino、José N Domı́nguez、Gricela Lobo、Jaime Charris-Charris、Juan C.G Cortés、Juan C Ribas、Cristina Devia、Ana M Rodrı́guez、Ricardo D Enriz
DOI:10.1016/s0968-0896(01)00116-x
日期:2001.8
Here we report the synthesis, in vitro antifungal evaluation and SAR study of 41 chalcones and analogues. In addition, all active structures were tested for their capacity of inhibiting Saccharomyces cerevisiae beta (1,3)-glucan synthase and chitin synthase, enzymes that catalyze the synthesis of the major polymers of the fungal cell wall. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis and anti Methicillin resistant Staphylococcus aureus activity of substituted chalcones alone and in combination with non-beta-lactam antibiotics
A total of 30 chalcone analogues was synthesized via a base catalyzed Claisen Schmidt condensation and screened for their in vitro antibacterial activity against Methicillin-sensitive Staphylococcus aureus (MSSA) and Methicillin-resistant Staphylococcus aureus (MRSA) alone or in combination with non beta-lactam antibiotics namely ciprofloxacin, chloramphenicol, erythromycin, vancomycin, doxycycline and gentamicin. In the checkerboard technique, fractional inhibitory concentration indices (FICI) show that the following combinations like ciprofloxacin with 25 (4'-bromo-2-hydroxychalcone); doxycycline with 21 (4-hydroxychalcone); doxycycline with 25; and doxycycline with 4 (2',2-dihydroxychalcone) were synergistic against MRSA. In term SAR study, the relationship between chalcone structure and their antibacterial activity against S. aureus and synergy with tested antibiotics were discussed. Possible mechanisms for antibacterial activity of chalcones alone as well as the synergistic effect in combinations were proposed by molecular modeling studies, respectively. Combinations of chalcones with conventional antibiotics could be an effective alternative in the treatment of infection caused by MRSA. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and anti-inflammatory activity of chalcone derivatives
作者:Felipe Herencia、M.Luisa Ferrándiz、Amalia Ubeda、JoséN. Domínguez、Jaime E. Charris、Gricela M. Lobo、M.José Alcaraz
DOI:10.1016/s0960-894x(98)00179-6
日期:1998.5
Chalcones and their derivatives were synthesized and evaluated for their anti-inflammatory activity. In vitro, chalcones 2, 4, 8, 10 and 13 inhibited degranulation and 5-lipoxygenase in human neutrophils, whereas 11 behaved as scavenger of superoxide. Only four compounds (4-7) inhibited cyclo-oxygenase-2 activity. The majority of these samples showed anti-inflammatory effects in the mouse air pouch model. (C) 1998 Elsevier Science Ltd. All rights reserved.
SAR and molecular mechanism studies of monoamine oxidase inhibition by selected chalcone analogs
作者:Raed Shalaby、Jacobus P. Petzer、Anél Petzer、Usman M. Ashraf、Ealla Atari、Fawaz Alasmari、Sivarajan Kumarasamy、Youssef Sari、Ashraf Khalil
DOI:10.1080/14756366.2019.1593158
日期:2019.1.1
reversible competitive mode of inhibition. Most of the synthesized chalcone analogs showed a better selectivity toward MAO-B. However, introducing of 2,4,6-trimethoxy substituents on ring B shifted the selectivity toward MAO-A. In addition, we investigated the molecular mechanism of MAO-B inhibition by selected chalcone analogs. Our results revealed that these selected chalcone analogs increased dopamine levels