Neeraj Dhar

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Related publications (53)

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Phenotypic Profiling of Mycobacterium tuberculosis EspA Point Mutants Reveals that Blockage of ESAT-6 and CFP-10 Secretion In Vitro Does Not Always Correlate with Attenuation of Virulence

Stewart Cole, Anna De Graff Tischler, Neeraj Dhar, Florence Pojer, Ming Zhang, Jan Lars Rybniker

The EspA protein of Mycobacterium tuberculosis is essential for the type VII ESX-1 protein secretion apparatus, which delivers the principal virulence factors ESAT-6 and CFP-10. In this study, site-directed mutagenesis of EspA was performed to elucidate it ...

American Society for Microbiology2013

Mycobacterium tuberculosis EspB binds phospholipids and mediates EsxA-independent virulence

Stewart Cole, Neeraj Dhar, Florence Pojer, Ming Zhang, Stefanie Boy-Röttger, Jan Lars Rybniker

The type-VII ESX-1 secretion apparatus, encoded by the esx-1 genetic locus, is essential for the export of EsxA and EsxB, two major virulence factors of Mycobacterium tuberculosis. ESX-1 also requires the products of the unlinked espACD operon for optimal ...

Wiley-Blackwell2013

Identification of aminopyrimidine-sulfonamides as potent modulators of Wag31-mediated cell elongation in mycobacteria

Kai Johnsson, Gaëlle Séraphine Kolly, Graham Knott, John McKinney, Stewart Cole, Neeraj Dhar, Monica Rengifo Gonzalez, Ruben Hartkoorn, Isabella Santi, Edina Rita Székely, François Signorino-Gelo, Jan Lars Rybniker, Anthony Vocat

There is an urgent need to discover new antitubercular agents with novel mechanisms of action in order to tackle the scourge of drug-resistant tuberculosis. Here, we report the identification of such a molecule - an AminoPYrimidine-Sulfonamide (APYS1) that ...

Wiley-Blackwell2017

The Phosphatidyl-myo-Inositol Mannosyltransferase PimA Is Essential for Mycobacterium tuberculosis Growth In Vitro and In Vivo (vol 196, pg 3441, 2014)

Gaëlle Séraphine Kolly, Stewart Cole, Neeraj Dhar, Claudia Sala, Ming Zhang

American Society for Microbiology2014

A lung-on-chip model of early Mycobacterium tuberculosis infection reveals an essential role for alveolar epithelial cells in controlling bacterial growth

John McKinney, Neeraj Dhar, Kunal Sharma, Vivek Vijay Thacker

We establish a murine lung-on-chip infection model and use time-lapse imaging to reveal the dynamics of host-Mycobacterium tuberculosis interactions at an air-liquid interface with a spatiotemporal resolution unattainable in animal models and to probe the ...

2020

EspD Is Critical for the Virulence-Mediating ESX-1 Secretion System in Mycobacterium tuberculosis

Stewart Cole, Neeraj Dhar, Florence Pojer, Stefanie Boy-Röttger

ESAT-6 system 1 (ESX-1)-mediated secretion in Mycobacterium tuberculosis is dependent on proteins encoded by the cotranscribed espA-espC-espD gene cluster. While the roles of EspA and EspC with respect to the ESX-1 secretion system have been actively inves ...

American Society for Microbiology2011

Bacteria: Driving polar growth

Neeraj Dhar

Profiling the phenotype of 200,000 mutants revealed a new cofactor that may help a group of rod-shaped bacteria elongate and grow. ...

2020

Whole Cell Target Engagement Identifies Novel Inhibitors of Mycobacterium tuberculosis Decaprenylphosphoryl-beta-D-ribose Oxidase

John McKinney, Neeraj Dhar

We have targeted the Mycobacterium tuberculosis decaprenylphosphoryl-beta-D-ribose oxidase (Mt-DprE1) for potential chemotherapeutic intervention of tuberculosis. A multicopy suppression strategy that overexpressed Mt-DprEl in M. bovis BCG was used to prof ...

Amer Chemical Soc2015

Phenotypic Heterogeneity in Mycobacterium tuberculosis

John McKinney, Neeraj Dhar, Giulia Manina

The interaction between the host and the pathogen is extremely complex and is affected by anatomical, physiological, and immunological diversity in the microenvironments, leading to phenotypic diversity of the pathogen. Phenotypic heterogeneity, defined as ...

Amer Soc Microbiology2016

Enhanced and Enduring Protection against Tuberculosis by Recombinant BCG-Ag85C and Its Association with Modulation of Cytokine Profile in Lung

Neeraj Dhar

Background: The variable efficacy (0-80%) of Mycobacterium bovis Bacille Calmette Gurein (BCG) vaccine against adult tuberculosis (TB) necessitates development of alternative vaccine candidates. Development of recombinant BCG (rBCG) over-expressing promisi ...

Public Library of Science2008

Stress and Host Immunity Amplify Mycobacterium tuberculosis Phenotypic Heterogeneity and Induce Nongrowing Metabolically Active Forms

John McKinney, Neeraj Dhar, Giulia Manina

Nonreplicating and metabolically quiescent bacteria are implicated in latent tuberculosis infections and relapses following "sterilizing" chemotherapy. However, evidence linking bacterial dormancy and persistence in vivo is largely inconclusive. Here we me ...

Cell Press2015

Elicitation of efficient, protective immune responses by using DNA vaccines against tuberculosis (vol 23, pg 5655, 2005)

Neeraj Dhar

ELSEVIER SCI LTD2020

Early invasion of the bladder wall by solitary bacteria protects UPEC from antibiotics and neutrophil swarms in an organoid model

Graham Knott, John McKinney, Neeraj Dhar, François Signorino-Gelo, Kunal Sharma, Vivek Vijay Thacker, Anaëlle Fabienne Dubois

2021