Abstract:
:The semen-derived enhancer of viral infection (SEVI) is a positively charged amyloid fibril that is derived from a self-assembling proteolytic cleavage fragment of prostatic acid phosphatase (PAP(248-286)). SEVI efficiently facilitates HIV-1 infection in vitro, but its normal physiologic function remains unknown. In light of the fact that other amyloidogenic peptides have been shown to possess direct antibacterial activity, we investigated whether SEVI could inhibit bacterial growth. Neither SEVI fibrils nor the unassembled PAP(248-286) peptide had significant direct antibacterial activity in vitro. However, SEVI fibrils bound to both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli and Neisseria gonorrhoeae) bacteria, in a charge-dependent fashion. Furthermore, SEVI fibrils but not the monomeric PAP(248-286) peptide promoted bacterial aggregation and enhanced the phagocytosis of bacteria by primary human macrophages. SEVI also enhanced binding of bacteria to macrophages and the subsequent release of bacterially induced proinflammatory cytokines (tumor necrosis factor alpha [TNF-α], interleukin-6 [IL-6], and IL-1β). Finally, SEVI fibrils inhibited murine vaginal colonization with Neisseria gonorrhoeae. These findings demonstrate that SEVI has indirect antimicrobial activity and that this activity is dependent on both the cationic charge and the fibrillar nature of SEVI.
journal_name
Antimicrob Agents Chemotherjournal_title
Antimicrobial agents and chemotherapyauthors
Easterhoff D,Ontiveros F,Brooks LR,Kim Y,Ross B,Silva JN,Olsen JS,Feng C,Hardy DJ,Dunman PM,Dewhurst Sdoi
10.1128/AAC.02464-12subject
Has Abstractpub_date
2013-06-01 00:00:00pages
2443-50issue
6eissn
0066-4804issn
1098-6596pii
AAC.02464-12journal_volume
57pub_type
杂志文章abstract::Enucleated human polymorphonuclear leukocytes (PMN cytoplasts), which have no nuclei and only a few granules, retain many of the functions of intact neutrophils. To better define the mechanisms and intracellular sites of antimicrobial agent accumulation in human neutrophils, we studied the antibiotic uptake process in...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.34.6.1189
更新日期:1990-06-01 00:00:00
abstract::The assembly of hepatitis B virus (HBV) core protein (HBc) into capsids represents a critical step of viral replication. HBc has multiple functions during the HBV life cycle, which makes it an attractive target for antiviral therapies. Capsid assembly modulators (CAMs) induce the formation of empty capsid or aberrant ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00835-18
更新日期:2018-09-24 00:00:00
abstract::Pradimicin S (PRM-S) is a highly water-soluble, negatively charged derivative of the antibiotic pradimicin A (PRM-A) in which the terminal xylose moiety has been replaced by 3-sulfated glucose. PRM-S does not prevent human immunodeficiency virus (HIV) adsorption on CD4(+) T cells, but it blocks virus entry into its ta...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01347-09
更新日期:2010-04-01 00:00:00
abstract::Robust determination of the concentration-time profile of anti-infective agents in certain specialized compartments is often limited by the inability to obtain more than a single sample from such a site in any one subject. Vitreous humor and cerebrospinal fluid are obvious examples for which the determination of conce...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.39.8.1683
更新日期:1995-08-01 00:00:00
abstract::Posaconazole in oral suspension must be taken multiple times a day with food (preferably a high-fat meal) to ensure adequate exposure among patients. We evaluated the effect of food on the bioavailability of a new delayed-release tablet formulation of posaconazole at the proposed clinical dose of 300 mg once daily in ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章,随机对照试验
doi:10.1128/AAC.05000-14
更新日期:2015-01-01 00:00:00
abstract::The apicomplexan parasites Cryptosporidium and Toxoplasma are serious threats to human health. Cryptosporidiosis is a severe diarrheal disease in malnourished children and immunocompromised individuals, with the only FDA-approved drug treatment currently being nitazoxanide. The existing therapies for toxoplasmosis, an...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00873-16
更新日期:2016-09-23 00:00:00
abstract::SM-8668 (Sch 39304) is a new oral antifungal agent which we evaluated in comparison with fluconazole in various fungal infection models. The prophylactic effect of SM-8668 was excellent against systemic candidiasis, aspergillosis, and cryptococcosis in mice. The 50% effective dose for SM-8668 was assessed at 10 days a...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.34.6.980
更新日期:1990-06-01 00:00:00
abstract::A-80556 is a novel fluoroquinolone with potent antibacterial activity against gram-positive, gram-negative, and anaerobic organisms. A-80556 was more active than ciprofloxacin, ofloxacin, lomefloxacin, and sparfloxacin against gram-positive bacteria. A-80556 was particularly active against Staphylococcus aureus (MIC f...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.38.5.1071
更新日期:1994-05-01 00:00:00
abstract::The role of Acinetobacter baumannii ATCC 17978 UmuDC homologs A1S_0636-A1S_0637, A1S_1174-A1S_1173, and A1S_1389 (UmuDAb) in antibiotic resistance acquired through UV-induced mutagenesis was evaluated. Neither the growth rate nor the UV-related survival of any of the three mutants was significantly different from that...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.02346-13
更新日期:2014-01-01 00:00:00
abstract::We evaluated and compared the efficacies of different antifungal drugs against Sarocladium kiliense (formerly Acremonium kiliense), a clinically relevant opportunistic fungus, in a murine model of systemic infection. Three clinical strains of this fungus were tested, and the therapy administered was as follows: posaco...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01484-13
更新日期:2013-12-01 00:00:00
abstract::A single-nucleotide polymorphism-based cluster grouping (SCG) classification system for Mycobacterium tuberculosis was used to examine antibiotic resistance type and resistance mutations in relationship to specific evolutionary lineages. Drug resistance and resistance mutations were seen across all SCGs. SCG-2 had hig...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00619-07
更新日期:2007-11-01 00:00:00
abstract::We studied the influence of the lipid/amphotericin B (AMB) ratio and the phospholipid type on the in vitro renal cell toxicity and antifungal efficacy of lipid-associated AMB (L-AMB). L-AMB was prepared at one of two different lipid/AMB ratios (1 and 40) by incubating AMB with empty small unilamellar vesicles, made fr...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.36.2.262
更新日期:1992-02-01 00:00:00
abstract::Cilofungin has potent in vitro activity against Candida albicans, but previous in vivo models using twice daily intermittent dosing regimens have not consistently demonstrated in vivo efficacy. Because of the pharmacokinetics of cilofungin in rabbits, it has been suggested that administration by continuous intravenous...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.36.1.56
更新日期:1992-01-01 00:00:00
abstract::Transfer of piperaquine (PQ) into breast milk was examined in 27 Papua New Guinean women given a 3-day course of dihydroartemisinin-PQ or sulfadoxine-pyrimethamine-PQ during the second/third trimester. Breast milk was sampled on days 1, 2, 3 to 5, 7 to 11, and 14 to 17 postdelivery, a median of 70 days postdose (range...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00327-15
更新日期:2015-07-01 00:00:00
abstract::The dependence of microbial killing on chloride ions present in solutions undergoing iontophoresis is addressed. A 400-microA current was applied to vials containing synthetic urine or saline, and the production of chlorine-based substances (CBSs) was detected by the N,N-diethyl-p-phenylene diamine colorimetric method...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/aac.38.12.2768
更新日期:1994-12-01 00:00:00
abstract::Ampicillin-resistant Enterococcus faecium (ARE) and vancomycin-resistant E. faecium (VRE) are important nosocomial pathogens. We quantified effects of probiotics and antibiotics on intestinal acquisition of ARE colonization in patients hospitalized in two non-intensive care unit (non-ICU) wards with high ARE prevalenc...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01765-09
更新日期:2010-07-01 00:00:00
abstract::N(2)-(3,4-Dichlorobenzyl)-7-(2-[1-morpholinyl]ethyl)guanine (MorE-DCBG, 362E) is a synthetic purine that selectively inhibits the replication-specific DNA polymerase of Clostridium difficile. MorE-DCBG and its analogs strongly inhibited the growth of a wide variety of C. difficile strains. When administered orally in ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.06097-11
更新日期:2012-03-01 00:00:00
abstract::The clinical vancomycin-intermediate Staphylococcus aureus (VISA) strain Mu50 carries two mutations in the vraSR and graRS two-component regulatory systems (TCRSs), namely, vraS(I5N) and graR(N197S) (hereinafter designated graR). The clinical heterogeneously vancomycin-intermediate S. aureus (hVISA) strain Mu3 shares ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00398-11
更新日期:2011-09-01 00:00:00
abstract::The caspofungin clinical trial database offers an opportunity to assess susceptibility results for Candida pathogens obtained from patients with candidiasis and allows for correlations between efficacy outcomes and MICs. Candida isolates have been identified from patients enrolled in four studies of esophageal candidi...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.49.9.3616-3623.2005
更新日期:2005-09-01 00:00:00
abstract::"Shock and kill" therapeutic strategies toward HIV eradication are based on the transcriptional activation of latent HIV with a latency-reversing agent (LRA) and the consequent killing of the reactivated cell by either the cytopathic effect of HIV or an arm of the immune system. We have recently found several benzotri...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00888-20
更新日期:2020-07-22 00:00:00
abstract::The increasing prevalence of drug-resistant pathogens highlights the need to identify novel antibiotics. Here we investigated the efficacies of four new antimicrobial peptides (AMPs) for potential drug development. The antibacterial activities, synergistic effects, and antibiofilm properties of the four chimeric AMPs ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.02473-13
更新日期:2014-01-01 00:00:00
abstract::The in vitro activities of ACH-702 and other antimicrobials against 30 Nocardia brasiliensis isolates were tested. The MIC(50) (MIC for 50% of the strains tested) and MIC(90) values of ACH-702 were 0.125 and 0.5 microg/ml. The same values for econazole were 2 and 4 microg/ml. The MIC(50) and MIC(90) values of imipenem...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01520-09
更新日期:2010-05-01 00:00:00
abstract::In this study, we synthesized antisense oligodeoxynucleotides (ODNs) with phosphodiester, phosphorothioate (S-ODNs), or methylphosphonate linkages complementary to the splicing acceptor site of immediate-early pre-mRNA 5 of herpes simplex virus type 1 (HSV-1). The antiviral activity of each analog on cytopathic effect...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.40.7.1670
更新日期:1996-07-01 00:00:00
abstract::The activity of the pradimicin derivative BMS 181184 was evaluated in a model of invasive pulmonary aspergillosis in persistently neutropenic rabbits and compared with that of amphotericin B deoxycholate. BMS 181184 at total daily doses of 50 and 150 mg/kg of body weight was at least as effective as amphotericin B at ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.42.9.2399
更新日期:1998-09-01 00:00:00
abstract::In a sample of 6,156 sequences from 4,183 persons, the top 30 patterns of protease inhibitor, nucleoside reverse transcriptase (RT) inhibitor, and nonnucleoside RT inhibitor mutations accounted for 55, 46, and 66%, respectively, of sequences with drug resistance mutations. Characterization of the phenotypic and clinic...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.48.8.3122-3126.2004
更新日期:2004-08-01 00:00:00
abstract::Highly drug-resistant Salmonella enterica serovar Indiana became the most common serovar in broilers with diarrhea in China over the course of this study (15% in 2010 to 70% in 2014). While most S. Indiana isolates (87%, 384/440) were resistant to 13 to 16 of the 16 antibiotics tested, 89% of non-S. Indiana isolates (...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.03009-15
更新日期:2016-01-11 00:00:00
abstract::Alveolar echinococcosis (AE) is a severe disease caused by the larval stage of the tapeworm Echinococcus multilocularis Current chemotherapeutic treatment options based on benzimidazoles are of limited effectiveness, which underlines the need to find new antiechinococcosis drugs. Metformin is an antihyperglycemic and ...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.01808-19
更新日期:2020-08-20 00:00:00
abstract::The diversity and evolution of the class A OXY beta-lactamase from Klebsiella oxytoca were investigated and compared to housekeeping gene diversity. The entire bla(OXY) coding region was sequenced in 18 clinical isolates representative of the four K. oxytoca beta-lactamase gene groups bla(OXY-1) to bla(OXY-4) and of t...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.49.8.3453-3462.2005
更新日期:2005-08-01 00:00:00
abstract::The antimicrobial activities of calcium-deficient apatite loaded with different concentrations (25, 100, and 500 microg/mg) of vancomycin as a filling biomaterial were evaluated in a methicillin-resistant Staphylococcus aureus (MRSA) rabbit acute osteomyelitis model. Bacterial counts in bone, bone marrow, and joint fl...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00434-09
更新日期:2010-02-01 00:00:00
abstract::The multidrug resistance profiles of Klebsiella pneumoniae carbapenemase (KPC) producers have led to increased clinical polymyxin use. Combination therapy with polymyxins may improve treatment outcomes, but it is uncertain which combinations are most effective. Clinical successes with intravenous minocycline-based com...
journal_title:Antimicrobial agents and chemotherapy
pub_type: 杂志文章
doi:10.1128/AAC.00073-17
更新日期:2017-06-27 00:00:00