urinary tract infections/tyrosine

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The tyrosine gate of the bacterial lectin FimH: a conformational analysis by NMR spectroscopy and X-ray crystallography.

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Urinary tract infections caused by uropathogenic E. coli are among the most prevalent infectious diseases. The mannose-specific lectin FimH mediates the adhesion of the bacteria to the urothelium, thus enabling host cell invasion and recurrent infections. An attractive alternative to antibiotic

Uropathogenic Escherichia coli Metabolite-Dependent Quiescence and Persistence May Explain Antibiotic Tolerance during Urinary Tract Infection.

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In the present study, it is shown that although Escherichia coli CFT073, a human uropathogenic (UPEC) strain, grows in liquid glucose M9 minimal medium, it fails to grow on glucose M9 minimal medium agar plates seeded with ≤10(6) CFU. The cells on glucose plates appear to be in a "quiescent" state

Molecular dynamics and computational study of Mannich-based coumarin derivatives: Potent tyrosine kinase inhibitor.

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The manifestation of bacterial UTI (Urinary Tract Infection) has been predominantly endemic, globally; eventually, the development of new UTI anti-bacterial agent(s) remains the call of the day. Herein, two series of Mannich-based 4-hydroxy coumarin derivatives, 7a-m and 8a-m were designed by

The tyrosine gate as a potential entropic lever in the receptor-binding site of the bacterial adhesin FimH.

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Uropathogenic Escherichia coli (UPEC) are the major causative agents of urinary tract infections. During infection, UPEC adhere to mannosylated glycoreceptors on the urothelium via the FimH adhesin located at the tip of type 1 pili. Synthetic FimH antiadhesives such as alkyl and phenyl

Validation of Reactivity Descriptors to Assess the Aromatic Stacking within the Tyrosine Gate of FimH.

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Antagonists of the FimH adhesin, a protein almost universally present at the extremity of type-1 fimbriae expressed by Escherichia coli, have been abundantly in the spotlight as alternative treatments of urinary tract infections. The antagonists function as bacterial antiadhesives through highly

MV140, a sublingual polyvalent bacterial preparation to treat recurrent urinary tract infections, licenses human dendritic cells for generating Th1, Th17, and IL-10 responses via Syk and MyD88.

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Recurrent urinary tract infections (RUTIs) are one of the most common bacterial infectious diseases, especially in women. Antibiotics remain the mainstay of treatment, but their overuse is associated with antibiotic-resistant infections and deleterious effects in the microbiota. Therefore,

Inhibition of TNFalpha-induced activation of nuclear factor kappaB by kava (Piper methysticum) derivatives.

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The inducible transcription factor nuclear factor kappaB (NF-kappaB) plays a central role in the regulation of immune, inflammatory and carcinogenic responses. While normal activation of NF-kappaB is required for cell survival and immunity, its deregulated expression is a characteristic of

Improvement of Aglycone π-Stacking Yields Nanomolar to Sub-nanomolar FimH Antagonists.

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Antimicrobial resistance has become a serious concern for the treatment of urinary tract infections. In this context, an anti-adhesive approach targeting FimH, a bacterial lectin enabling the attachment of E. coli to host cells, has attracted considerable interest. FimH can adopt a

Identification and Characterization of a Phase-Variable Element That Regulates the Autotransporter UpaE in Uropathogenic Escherichia coli.

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Uropathogenic Escherichia coli (UPEC) is the most common etiologic agent of uncomplicated urinary tract infection (UTI). An important mechanism of gene regulation in UPEC is phase variation that involves inversion of a promoter-containing DNA element via enzymatic activity of tyrosine recombinases,

Development of Mannopyranoside Therapeutics against Adherent-Invasive Escherichia coli Infections.

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Preventing bacterial adhesion to host cells is a provocative and alternative approach to traditional antibiotic treatments given the increasing microbial resistance. A brief overview of common antibiotic treatments is described in light of their respective resistance and remaining susceptibility.

Fimbria-like hemagglutinin of Escherichia coli O75 strains.

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Fifteen strains of Escherichia coli O75 from human feces and patients with urinary tract infections were analyzed for their hemagglutinative properties, production of hemolysin and colicin, and plasmid contents. Fourteen strains produced type-1 fimbriae in broth culture. Nine of the strains

The status of fostamatinib in the treatment of rheumatoid arthritis.

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Fostamatinib (R788) is a prodrug rapidly converted to its active metabolite on oral administration. This (known as R406) is a potent inhibitor of spleen tyrosine kinase, required for the expression of a number of proinflammatory cytokines. Fostamatinib has shown significantly superior efficacy (when

Identification of a novel causative mutation in the ROR2 gene in a Lebanese family with a mild form of recessive Robinow syndrome.

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Autosomal recessive Robinow syndrome (OMIM 268310) is a condition caused by mutations in the ROR2 gene, the receptor tyrosine kinase-like orphan receptor 2. The main characteristic features are: a face resembling that of a fetus, cleft lip and palate, mesomelic limb shortening, a micropenis in

Structures of C-mannosylated anti-adhesives bound to the type 1 fimbrial FimH adhesin.

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Selective inhibitors of the type 1 fimbrial adhesin FimH are recognized as attractive alternatives for antibiotic therapies and prophylaxes against Escherichia coli infections such as urinary-tract infections. To construct these inhibitors, the α-d-mannopyranoside of high-mannose N-glycans,

Lead optimization studies on FimH antagonists: discovery of potent and orally bioavailable ortho-substituted biphenyl mannosides.

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Herein, we describe the X-ray structure-based design and optimization of biaryl mannoside FimH inhibitors. Diverse modifications to the biaryl ring to improve druglike physical and pharmacokinetic properties of mannosides were assessed for FimH binding affinity based on their effects on

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