Abstract:
:Treatment of HIV-infected patients coinfected with Mycobacterium tuberculosis is challenging due to drug-drug interactions (DDIs) between antiretrovirals (ARVs) and antituberculosis (anti-TB) drugs. The aim of this study was to quantify the effect of cobicistat (COBI) or ritonavir (RTV) in modulating DDIs between darunavir (DRV) and rifampin (RIF) in a human hepatocyte-based in vitro model. Human primary hepatocyte cultures were incubated with RIF alone or in combination with either COBI or RTV for 3 days, followed by coincubation with DRV for 1 h. The resultant DRV concentrations were quantified by high-performance liquid chromatography with UV detection, and the apparent intrinsic clearance (CLint.app.) of DRV was calculated. Both RTV and COBI lowered the RIF-induced increases in CLint.app. in a concentration-dependent manner. Linear regression analysis showed that log10 RTV and log10 COBI concentrations were associated with the percent inhibition of RIF-induced elevations in DRV CLint.app., where β was equal to -234 (95% confidence interval [CI] = -275 to -193; P < 0.0001) and -73 (95% CI = -89 to -57; P < 0.0001), respectively. RTV was more effective in lowering 10 μM RIF-induced elevations in DRV CLint.app. (half-maximal [50%] inhibitory concentration [IC50] = 0.025 μM) than COBI (IC50 = 0.223 μM). Incubation of either RTV or COBI in combination with RIF was sufficient to overcome RIF-induced elevations in DRV CLint.app., with RTV being more potent than COBI. These data provide the first in vitro experimental insight into DDIs between RIF and COBI-boosted or RTV-boosted DRV and will be useful to inform physiologically based pharmacokinetic (PBPK) models to aid in optimizing dosing regimens for the treatment of patients coinfected with HIV and M. tuberculosis.
journal_name
Antimicrob Agents Chemotherjournal_title
Antimicrobial agents and chemotherapyauthors
Roberts O,Khoo S,Owen A,Siccardi Mdoi
10.1128/AAC.01776-16subject
Has Abstractpub_date
2017-04-24 00:00:00issue
5eissn
0066-4804issn
1098-6596pii
AAC.01776-16journal_volume
61pub_type
杂志文章abstract::The effect of ethambutol (EMB) is primarily on polymerization steps in the biosynthesis of the arabinan component of cell wall arabinogalactan (AG) of Mycobacterium smegmatis. Inhibition of the synthesis of the arabinan of lipoarabinomannan (LAM) occurred later, and thus in the cases of AG and LAM, the polymerization ...
journal_title:Antimicrobial agents and chemotherapy
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doi:10.1128/aac.39.11.2484
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abstract::Receipt of parenteral nutrition (PN) remains an independent risk factor for developing catheter-related bloodstream infections (CR-BSI) caused by fungi, including by the polymorphic fungus Candida albicans, which is notoriously adept at forming drug-resistant biofilm structures. Among a variety of macronutrients, PN s...
journal_title:Antimicrobial agents and chemotherapy
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journal_title:Antimicrobial agents and chemotherapy
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doi:10.1128/aac.3.1.63
更新日期:1973-01-01 00:00:00
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journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.48.10.4020-4022.2004
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journal_title:Antimicrobial agents and chemotherapy
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abstract::Two new fluorinated oxazolidinones, U-100592 and U-100766, were evaluated against more than 659 gram-positive and -negative organisms and compared with glycopeptides, erythromycin, clindamycin, clinafloxacin, and chloramphenicol. U-100592 and U-100766 were usually equally potent, but the MICs at which 90% of the isola...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.40.3.720
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journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.19.2.309
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journal_title:Antimicrobial agents and chemotherapy
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journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章,随机对照试验
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journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
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更新日期:1983-12-01 00:00:00
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journal_title:Antimicrobial agents and chemotherapy
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journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.02431-13
更新日期:2014-01-01 00:00:00
abstract::The in vitro activities of four fluoroquinolone compounds were tested against 92 Escherichia coli strains of ovine and caprine origin under aerobic and anaerobic incubation conditions. The four fluoroquinolones proved to be highly effective against the E. coli isolates tested. When bacteria were cultured anaerobically...
journal_title:Antimicrobial agents and chemotherapy
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doi:10.1128/aac.38.10.2469
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journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.24.3.339
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journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.25.6.783
更新日期:1984-06-01 00:00:00
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journal_title:Antimicrobial agents and chemotherapy
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journal_title:Antimicrobial agents and chemotherapy
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doi:10.1128/AAC.00736-11
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journal_title:Antimicrobial agents and chemotherapy
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journal_title:Antimicrobial agents and chemotherapy
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abstract::The polymorphic fungus Candida albicans is one of the most versatile opportunistic pathogens in humans. Many organs of the human body are potential targets for infection by this pathogen, but infection is commonly localized in the gastrointestinal tract, an environment providing anaerobic growth conditions. We describ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
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journal_title:Antimicrobial agents and chemotherapy
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abstract::Minimal inhibitory concentrations of carbenicillin, chloramphenicol, tetracycline, gentamicin, tobramycin, and trimethoprim-sulfamethoxazole were determined for rough, smooth, and mucoid Pseudomonas sp. isolates from sputa collected from 40 cystic fibrosis patients. Ninety-four percent of the minimal inhibitory concen...
journal_title:Antimicrobial agents and chemotherapy
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journal_title:Antimicrobial agents and chemotherapy
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journal_title:Antimicrobial agents and chemotherapy
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abstract::We investigated a possible synergistic effect of a macrolide and beta-lactams against Streptococcus pneumoniae strains with different resistance profiles. Checkerboard and time-kill assays of erythromycin combined with penicillin or cefotaxime essentially showed indifference, suggesting that these antibiotics in combi...
journal_title:Antimicrobial agents and chemotherapy
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abstract::The aromatic diamidines represent a class of compounds with broad-spectrum antimicrobial activity; however, their development is hindered by a lack of understanding of their mechanism of antimicrobial action. DB75 [2,5-bis(4-amidinophenyl)furan] is a trypanocidal aromatic diamidine that was originally developed as a s...
journal_title:Antimicrobial agents and chemotherapy
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