Abstract:
:Computer-aided screening of antimicrobial peptides (AMPs) is a promising approach for discovering novel therapies against multidrug-resistant bacterial infections. Here, we functionally and structurally characterized an Escherichia coli-derived AMP (EcDBS1R5) previously designed through pattern identification [α-helical set (KK[ILV](3)[AILV])], followed by sequence optimization. EcDBS1R5 inhibited the growth of Gram-negative and Gram-positive, susceptible and resistant bacterial strains at low doses (2-32 μM), with no cytotoxicity observed against non-cancerous and cancerous cell lines in the concentration range analyzed (<100 μM). Furthermore, EcDBS1R5 (16 μM) acted on Pseudomonas aeruginosa pre-formed biofilms by compromising the viability of biofilm-constituting cells. The in vivo antibacterial potential of EcDBS1R5 was confirmed as the peptide reduced bacterial counts by two-logs 2 days post-infection using a skin scarification mouse model. Structurally, circular dichroism analysis revealed that EcDBS1R5 is unstructured in hydrophilic environments, but has strong helicity in 2,2,2-trifluoroethanol (TFE)/water mixtures (v/v) and sodium dodecyl sulfate (SDS) micelles. The TFE-induced nuclear magnetic resonance structure of EcDBS1R5 was determined and showed an amphipathic helical segment with flexible termini. Moreover, we observed that the amide protons for residues Met2-Ala8, Arg10, Ala13-Ala16, and Trp19 in EcDBS1R5 are protected from the solvent, as their temperature coefficients values are more positive than -4.6 ppb·K-1. In summary, this study reports a novel dual-antibacterial/antibiofilm α-helical peptide with therapeutic potential in vitro and in vivo against clinically relevant bacterial strains.
journal_name
ACS Infect Disjournal_title
ACS infectious diseasesauthors
Cardoso MH,Cândido ES,Chan LY,Der Torossian Torres M,Oshiro KGN,Rezende SB,Porto WF,Lu TK,de la Fuente-Nunez C,Craik DJ,Franco OLdoi
10.1021/acsinfecdis.8b00219subject
Has Abstractpub_date
2018-12-14 00:00:00pages
1727-1736issue
12issn
2373-8227journal_volume
4pub_type
杂志文章abstract::The maintenance of deoxyribonucleotide triphosphate (dNTP) homeostasis through synthesis and degradation is critical for accurate genomic and mitochondrial DNA replication fidelity. Trypanosoma brucei makes use of both the salvage and de novo pathways for the provision of pyrimidine dNTPs. In this respect, the sterile...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00551
更新日期:2021-01-08 00:00:00
abstract::MurG (uridine diphosphate-N-acetylglucosamine/N-acetylmuramyl-(pentapeptide) pyrophosphoryl-undecaprenol N-acetylglucosamine transferase) is an essential bacterial glycosyltransferase that catalyzes the N-acetylglucosamine (GlcNAc) transformation of lipid I to lipid II during peptidoglycan biosynthesis. Park's nucleot...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.9b00242
更新日期:2020-06-12 00:00:00
abstract::Antibacterial adjuvants are of great significance, since they allow the therapeutic dose of conventional antibiotics to be lowered and reduce the insurgence of antibiotic resistance. Herein, we report that an O-acetylserine sulfhydrylase (OASS) inhibitor can be used as a colistin adjuvant to treat infections caused by...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00378
更新日期:2021-01-29 00:00:00
abstract::A method for the fast isolation, propagation, and characterization of very low count bacteriophages active against pathogenic bacterial strains is described in this study. Bacteriophages with a count of 102 phage particles were dynamically adhered from the maximum 10 mL blood plasma sample onto the nanostructured part...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00358
更新日期:2020-10-09 00:00:00
abstract::Protein S-palmitoylation is an important post-translational modification (PTM) in blood stages of the malaria parasite, Plasmodium falciparum. S-palmitoylation refers to reversible covalent modification of cysteine residues of proteins by saturated fatty acids. In vivo, palmitoylation is regulated by concerted activit...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.9b00321
更新日期:2020-03-13 00:00:00
abstract::4-Oxo-4-phenyl-but-2-enoates inhibit MenB, the 1,4-dihydroxyl-2-naphthoyl-CoA synthase in the bacterial menaquinone (MK) biosynthesis pathway, through the formation of an adduct with coenzyme A (CoA). Here, we show that the corresponding methyl butenoates have MIC values as low as 0.35-0.75 µg/mL against drug sensitiv...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.6b00023
更新日期:2016-05-13 00:00:00
abstract::Glycosylated proteins (i.e., mucins, IgG) are important mediators of innate antiviral immunity in the vagina; however, our current knowledge of the role that glycan themselves play in genital immunity is relatively low. Herein, we evaluate the relationship between innate antiviral immunity and glycomic composition in ...
journal_title:ACS infectious diseases
pub_type: 杂志文章,随机对照试验
doi:10.1021/acsinfecdis.8b00157
更新日期:2018-11-09 00:00:00
abstract::The genomes of diverse mycobacterial species encode multiple proteins with the canonical l,d-transpeptidase (Ldt) sequence motif. The reason for this apparent redundancy is not well understood, but evidence suggests paralogous Ldts may serve niche roles in maintaining and/or remodeling mycobacterial peptidoglycan. We ...
journal_title:ACS infectious diseases
pub_type: 信件
doi:10.1021/acsinfecdis.9b00234
更新日期:2019-12-13 00:00:00
abstract::Neurotoxicity is an unwanted side effect for patients when receiving parenteral colistin therapy. The development of effective neuroprotective agents that can be coadministered during colistin therapy remains a priority area in antimicrobial chemotherapy. The present study aimed to investigate the protective effect of...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00107
更新日期:2020-06-12 00:00:00
abstract::Multidrug- and extensively drug-resistant strains of Mycobacterium tuberculosis are resistant to first- and second-line drug regimens and resulted in 210,000 fatalities in 2013. In the current study, we screened a library of aquatic bacterial natural product fractions for their ability to inhibit this pathogen. A frac...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.5b00005
更新日期:2015-04-10 00:00:00
abstract::Daptomycin is a lipopeptide antibiotic approved for use against Gram-positive organisms, including highly resistant species. A number of studies have suggested that daptomycin kills bacteria by membrane permeabilization and depolarization. Recently a model membrane system consisting of 1,2-dimyristoyl-sn-glycero-3-pho...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.6b00152
更新日期:2016-10-14 00:00:00
abstract::Enterovirus D68 (EV-D68) is an RNA virus that causes respiratory illnesses mainly in children. In severe cases, it can lead to neurological complications such as acute flaccid myelitis (AFM). EV-D68 belongs to the enterovirus genera of the Picornaviridae family, which also includes many other significant human pathoge...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00120
更新日期:2020-07-10 00:00:00
abstract::The recent outbreak of coronavirus disease 2019 (COVID-19) highlights an urgent need for therapeutics. Through a series of drug repurposing screening campaigns, niclosamide, an FDA-approved anthelminthic drug, was found to be effective against various viral infections with nanomolar to micromolar potency such as SARS-...
journal_title:ACS infectious diseases
pub_type: 杂志文章,评审
doi:10.1021/acsinfecdis.0c00052
更新日期:2020-05-08 00:00:00
abstract::Brain-eating amoebae cause devastating infections in the central nervous system of humans, resulting in a mortality rate of 95%. There are limited effective therapeutic options available clinically for treating granulomatous amoebic encephalitis and primary amoebic meningoencephalitis caused by Acanthamoeba castellani...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.9b00263
更新日期:2019-12-13 00:00:00
abstract::In the field of Parkinson's disease (PD) research, leucine-rich repeat kinase 2 (LRRK2) remains one of the most enigmatic kinases. LRRK2 pathogenic mutations result in increased kinase activity, making LRRK2 an attractive therapeutic target for PD. For over 10 years, the identification of a bona fide substrate and a p...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.9b00051
更新日期:2019-06-14 00:00:00
abstract::Subunit vaccines composed of protein antigens covalently attached to Toll-like receptor (TLR) agonists elicit superior immune responses compared to mixtures of antigens and TLR agonists. Among different conjugation approaches, enzyme-mediated ligation is one of the few that provides an opportunity for the generation o...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00047
更新日期:2020-07-10 00:00:00
abstract::Many viruses, including the hepatitis C virus (HCV), are dependent on the host RNA silencing pathway for replication. In this study, we screened small molecule probes, previously reported to disrupt loading of the RNA-induced silencing complex (RISC), including 6-hydroxydopamine (6-OHDA), suramin (SUR), and aurintrica...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.6b00098
更新日期:2016-11-11 00:00:00
abstract::At present, there is no licensed antiviral drug against dengue virus (DENV) infection. Mouse models of DENV infection have been widely used for preclinical evaluation of antivirals. However, only in a few instances so far have the data obtained from preclinical mouse model testing been associated with data from clinic...
journal_title:ACS infectious diseases
pub_type: 杂志文章,评审
doi:10.1021/acsinfecdis.8b00054
更新日期:2018-07-13 00:00:00
abstract::Although many new anti-infectives have been discovered and developed solely using phenotypic cellular screening and assay optimization, most researchers recognize that structure-guided drug design is more practical and less costly. In addition, a greater chemical space can be interrogated with structure-guided drug de...
journal_title:ACS infectious diseases
pub_type: 杂志文章,评审
doi:10.1021/acsinfecdis.7b00276
更新日期:2018-03-09 00:00:00
abstract::Superoxide anion radical is generated as a natural byproduct of aerobic metabolism but is also produced as part of the oxidative burst of the innate immune response design to kill pathogens. In living systems, superoxide is largely managed through superoxide dismutases (SODs), families of metalloenzymes that use Fe, M...
journal_title:ACS infectious diseases
pub_type: 杂志文章,评审
doi:10.1021/acsinfecdis.8b00026
更新日期:2018-06-08 00:00:00
abstract::The ability to respire and generate adenosine triphosphate (ATP) is essential for the physiology, persistence, and pathogenicity of Mycobacterium tuberculosis, which causes tuberculosis. By employing a lead repurposing strategy, the malarial cytochrome bc1 inhibitor SCR0911 was tested against mycobacteria. Docking stu...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.9b00408
更新日期:2020-04-10 00:00:00
abstract::Human African trypanosomiasis (HAT) is a fatal infectious disease caused by the eukaryotic pathogen Trypanosoma brucei (Tb). Available treatments are difficult to administer and have significant safety issues. S-Adenosylmethionine decarboxylase (AdoMetDC) is an essential enzyme in the parasite polyamine biosynthetic p...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.7b00022
更新日期:2017-07-14 00:00:00
abstract::Burkholderia multivorans is a significant health threat to persons with cystic fibrosis (CF). Infections are difficult to treat as this pathogen is inherently resistant to multiple antibiotics. Susceptibility testing of isolates obtained from CF respiratory cultures revealed that single agents selected from different ...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.7b00020
更新日期:2017-07-14 00:00:00
abstract::Photodynamic inactivation (PDI) protocols using photoactive metallated porphyrin-doped conjugated polymer nanoparticles (CPNs) and blue light were developed to eliminate multidrug-resistant pathogens. CPNs-PDI protocols using varying particle concentrations and irradiation doses were tested against nine pathogenic bac...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00268
更新日期:2020-08-14 00:00:00
abstract::Balhimycin, a vancomycin-type glycopeptide, is a lipid II targeting antibiotic produced by Amycolatopsis balhimycina. A. balhimycina has developed a self-resistance mechanism based on the synergistic action of different enzymes resulting in modified peptidoglycan. The canonical resistance mechanism against glycopeptid...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.5b00011
更新日期:2015-06-12 00:00:00
abstract::Pandemics such as influenza, smallpox, and plague have caused the loss of hundreds of millions of lives and have occurred for many centuries. Fortunately, they have been largely eliminated by the use of vaccinations and drugs. More recently, Severe Acute Respiratory Syndrome (SARS), Middle East Respiratory Syndrome (M...
journal_title:ACS infectious diseases
pub_type: 历史文章,杂志文章,评审
doi:10.1021/acsinfecdis.0c00291
更新日期:2020-07-10 00:00:00
abstract::Bacterial quorum sensing (QS) is being contemplated as a promising target for developing innovative diagnostic and therapeutic strategies. Here we report for the first time the development of antibodies against 2-heptyl-4-quinolone (HHQ), a signaling molecule from the pqs QS system of Pseudomonas aeruginosa, involved ...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.0c00604
更新日期:2020-12-11 00:00:00
abstract::The emergence and worldwide prevalence of New Delhi metallo-β-lactamase 1 (NDM-1) expressing Gram-negative bacteria with resistance against most β-lactam antibiotics pose a serious threat to human health. However, no NDM-1 inhibitors are clinically approved at present. Herein, based on the lead compound captopril, a s...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.8b00366
更新日期:2019-06-14 00:00:00
abstract::The fusion between the viral and the target cell membrane is a crucial step in the life cycle of enveloped viruses. The blocking of this process is a well-known therapeutic approach that led to the development of the fusion inhibitor peptide enfuvirtide, clinically used against human immunodeficiency virus (HIV) type ...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.8b00321
更新日期:2019-04-12 00:00:00
abstract::The root cause of the antibiotic resistance crisis is the ability of bacteria to evolve resistance to a multitude of antibiotics and other environmental toxins. The regulation of adaptation is difficult to pinpoint due to extensive phenotypic heterogeneity arising during evolution. Here, we investigate the mechanisms ...
journal_title:ACS infectious diseases
pub_type: 杂志文章
doi:10.1021/acsinfecdis.5b00095
更新日期:2015-11-13 00:00:00