tuberculosis/tyrosine

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Express path analysis identifies a tyrosine kinase Src-centric network regulating divergent host responses to Mycobacterium tuberculosis infection.

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Global gene expression profiling has emerged as a major tool in understanding complex response patterns of biological systems to perturbations. However, a lack of unbiased analytical approaches has restricted the utility of complex microarray data to gain novel system level insights. Here we report

A case of tuberculosis reactivation suspected of cancer progression during oral tyrosine kinase inhibitor treatment in a patient diagnosed as non-small cell lung cancer.

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We report a first case of a patient experiencing reactivation of pulmonary tuberculosis (TB) during treatment of oral tyrosine kinase inhibitor (TKI) with non-small cell lung cancer (NSCLC). A 44-year-old male patient visited the hospital with cough. He had been treated with erlotinib (oral TKI) for

Substrate activation of the low-molecular-weight protein tyrosine phosphatase from Mycobacterium tuberculosis.

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Mycobacterium tuberculosis is known to express a low-molecular-weight protein tyrosine phosphatase. This enzyme, denoted as MptpA (Mycobacterium protein tyrosine phosphatase A), is essential for the pathogen to escape the host immune system, and therefore represents a target for the

Discovery of Mycobacterium tuberculosis protein tyrosine phosphatase B (PtpB) inhibitors from natural products.

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Protein tyrosine phosphatase B (PtpB) is one of the virulence factors secreted into the host cell by Mycobacterium tuberculosis. PtpB attenuates host immune defenses by interfering with signal transduction pathways in macrophages and, therefore, it is considered a promising target for the

Identification of Bostrycin Derivatives as Potential Inhibitors of Mycobacterium tuberculosis Protein Tyrosine Phosphatase (MptpB).

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BACKGROUND As a virulence factor secreted into host cells, the Mycobacterium tuberculosis protein tyrosine phosphatase (MptpB) mediates the intracellular survival of M. tuberculosis. MptpB has become an attractive target for the development of new anti-tuberculosis drugs. OBJECTIVE In the present

Mycobacterial Protein Tyrosine Phosphatases A and B Inhibitors Augment the Bactericidal Activity of the Standard Anti-tuberculosis Regimen.

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Novel drugs are required to shorten the duration of treatment for tuberculosis (TB) and to combat the emergence of drug resistance. One approach has been to identify and target Mycobacterium tuberculosis (Mtb) virulence factors, which promote the establishment of TB infection and pathogenesis. Mtb

Design, synthesis and inhibition activity of novel cyclic peptides against protein tyrosine phosphatase A from Mycobacterium tuberculosis.

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Mycobacterium tuberculosis, the causative agent for tuberculosis has employed several signalling molecules to sense the host cellular environment and act accordingly. For example, protein tyrosine phosphatase A (MPtpA) of M. tuberculosis, a signalling protein belonging to the tyrosine phosphatase

Inhibition of Mycobacterium tuberculosis tyrosine phosphatase PtpA by synthetic chalcones: kinetics, molecular modeling, toxicity and effect on growth.

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Tuberculosis (TB) is a major cause of morbidity and mortality throughout the world, and it is estimated that one-third of the world's population is infected with Mycobacterium tuberculosis. Among a series of tested compounds, we have recently identified five synthetic chalcones which inhibit the

Protein tyrosine phosphorylation in Mycobacterium tuberculosis.

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Crude cell extracts from three strains of Mycobacterium tuberculosis were analyzed for the presence of proteins possessing phosphorylated tyrosine residues. A protein migrating at approximately 55 kDa was detected using an antiphosphotyrosine monoclonal antibody. In addition, less predominant bands

Mycobacterium tuberculosis PtkA is a novel protein tyrosine kinase whose substrate is PtpA.

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In Mycobacterium tuberculosis, signal transduction is mediated by 11 serine/threonine kinases, but no tyrosine kinases have been identified thus far. The protein encoded by the ORF (open reading frame) Rv2232 has been annotated as a member of the HAD (haloacid dehydrogenase-like hydrolase)

Lipoarabinomannan of Mycobacterium tuberculosis promotes protein tyrosine dephosphorylation and inhibition of mitogen-activated protein kinase in human mononuclear phagocytes. Role of the Src homology 2 containing tyrosine phosphatase 1.

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Lipoarabinomannan (LAM) is a putative virulence factor of Mycobacterium tuberculosis that inhibits monocyte functions, and this may involve antagonism of cell signaling pathways. The effects of LAM on protein tyrosine phosphorylation in cells of the human monocytic cell line THP-1 were examined. LAM

The tyrosine kinase inhibitor dasatinib reduces the growth of intracellular Mycobacterium tuberculosis despite impairing T-cell function.

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Tyrosine kinases are checkpoints for multiple cellular pathways and dysregulation induces malignancies, most notably chronic myeloid leukemia (CML). Inhibition of Abl-tyrosine kinases has evolved as a new concept for the treatment of CML and other malignant diseases. Due to the multiple

Tyrosine phosphatase MptpA of Mycobacterium tuberculosis inhibits phagocytosis and increases actin polymerization in macrophages.

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Protein tyrosine phosphatases from several microorganisms have been shown to play a role as virulence factors by modifying the phosphorylation/dephosphorylation equilibrium in cells of their host. Two tyrosine phosphatases, MptpA and MptpB, secreted by Mycobacterium tuberculosis, have been

The domain architecture of PtkA, the first tyrosine kinase from Mycobacterium tuberculosis, differs from the conventional kinase architecture.

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The discovery that MptpA (low-molecular-weight protein tyrosine phosphatase A) from Mycobacterium tuberculosis (Mtb) has an essential role for Mtb virulence has motivated research of tyrosine-specific phosphorylation in Mtb and other pathogenic bacteria. The phosphatase activity of MptpA is

Structural basis for selective inhibition of Mycobacterium tuberculosis protein tyrosine phosphatase PtpB.

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Tyrosine kinases and phosphatases establish the crucial balance of tyrosine phosphorylation in cellular signaling, but creating specific inhibitors of protein Tyr phosphatases (PTPs) remains a challenge. Here, we report the development of a potent, selective inhibitor of Mycobacterium tuberculosis

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