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Role of Glutamine Metabolism in Host Defense Against Mycobacterium tuberculosis Infection. 2019

Valerie A C M Koeken, and Ekta Lachmandas, and Anca Riza, and Vasiliki Matzaraki, and Yang Li, and Vinod Kumar, and Marije Oosting, and Leo A B Joosten, and Mihai G Netea, and Reinout van Crevel
Department of Internal Medicine, Radboud University Medical Center, Nijmegen.

Rewiring cellular metabolism is important for activation of immune cells during host defense against Mycobacterium tuberculosis. Glutamine has been implicated as an immunomodulatory nutrient, but its role in the response to M. tuberculosis is unknown. We assessed expression of glutamine pathway genes in M. tuberculosis-infected macrophages and blood transcriptomic profiles of individuals with latent M. tuberculosis infection or tuberculosis. Subsequently, we studied the effect of blocking glutaminolysis on M. tuberculosis-induced cytokines. Finally, we examined whether polymorphisms in genes involved in the glutamine pathway influence M. tuberculosis-induced cytokines in a cohort of 500 individuals. Glutamine pathway genes were differentially expressed in infected macrophages and patients with tuberculosis. Human peripheral blood mononuclear cells stimulated with M. tuberculosis displayed decreased cytokine (ie, interleukin 1β, interferon γ, and interleukin 17) responses when medium was devoid of glutamine. Specific inhibitors of the glutamine pathway led to decreased cytokine responses, especially T-cell cytokines (ie, interferon γ, interleukin 17, and interleukin 22). Finally, genetic polymorphisms in glutamine metabolism genes (including GLS2, SLC1A5, and SLC7A5) influenced ex vivo cytokine responses to M. tuberculosis, especially for T-cell cytokines. Cellular glutamine metabolism is implicated in effective host responses against M. tuberculosis. Targeting immunometabolism may represent new strategies for tuberculosis prevention and/or treatment.

UI MeSH Term Description Entries
D007963 Leukocytes, Mononuclear Mature LYMPHOCYTES and MONOCYTES transported by the blood to the body's extravascular space. They are morphologically distinguishable from mature granulocytic leukocytes by their large, non-lobed nuclei and lack of coarse, heavily stained cytoplasmic granules. Mononuclear Leukocyte,Mononuclear Leukocytes,PBMC Peripheral Blood Mononuclear Cells,Peripheral Blood Human Mononuclear Cells,Peripheral Blood Mononuclear Cell,Peripheral Blood Mononuclear Cells,Leukocyte, Mononuclear
D008264 Macrophages The relatively long-lived phagocytic cell of mammalian tissues that are derived from blood MONOCYTES. Main types are PERITONEAL MACROPHAGES; ALVEOLAR MACROPHAGES; HISTIOCYTES; KUPFFER CELLS of the liver; and OSTEOCLASTS. They may further differentiate within chronic inflammatory lesions to EPITHELIOID CELLS or may fuse to form FOREIGN BODY GIANT CELLS or LANGHANS GIANT CELLS. (from The Dictionary of Cell Biology, Lackie and Dow, 3rd ed.) Bone Marrow-Derived Macrophages,Monocyte-Derived Macrophages,Macrophage,Macrophages, Monocyte-Derived,Bone Marrow Derived Macrophages,Bone Marrow-Derived Macrophage,Macrophage, Bone Marrow-Derived,Macrophage, Monocyte-Derived,Macrophages, Bone Marrow-Derived,Macrophages, Monocyte Derived,Monocyte Derived Macrophages,Monocyte-Derived Macrophage
D009169 Mycobacterium tuberculosis A species of gram-positive, aerobic bacteria that produces TUBERCULOSIS in humans, other primates, CATTLE; DOGS; and some other animals which have contact with humans. Growth tends to be in serpentine, cordlike masses in which the bacilli show a parallel orientation. Mycobacterium tuberculosis H37Rv
D011110 Polymorphism, Genetic The regular and simultaneous occurrence in a single interbreeding population of two or more discontinuous genotypes. The concept includes differences in genotypes ranging in size from a single nucleotide site (POLYMORPHISM, SINGLE NUCLEOTIDE) to large nucleotide sequences visible at a chromosomal level. Gene Polymorphism,Genetic Polymorphism,Polymorphism (Genetics),Genetic Polymorphisms,Gene Polymorphisms,Polymorphism, Gene,Polymorphisms (Genetics),Polymorphisms, Gene,Polymorphisms, Genetic
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D005973 Glutamine A non-essential amino acid present abundantly throughout the body and is involved in many metabolic processes. It is synthesized from GLUTAMIC ACID and AMMONIA. It is the principal carrier of NITROGEN in the body and is an important energy source for many cells. D-Glutamine,L-Glutamine,D Glutamine,L Glutamine
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014376 Tuberculosis Any of the infectious diseases of man and other animals caused by species of MYCOBACTERIUM TUBERCULOSIS. Koch's Disease,Kochs Disease,Mycobacterium tuberculosis Infection,Infection, Mycobacterium tuberculosis,Infections, Mycobacterium tuberculosis,Koch Disease,Mycobacterium tuberculosis Infections,Tuberculoses
D016207 Cytokines Non-antibody proteins secreted by inflammatory leukocytes and some non-leukocytic cells, that act as intercellular mediators. They differ from classical hormones in that they are produced by a number of tissue or cell types rather than by specialized glands. They generally act locally in a paracrine or autocrine rather than endocrine manner. Cytokine
D055985 Latent Tuberculosis The dormant form of TUBERCULOSIS where the person shows no obvious symptoms and no sign of the causative agent (Mycobacterium tuberculosis) in the SPUTUM despite being positive for tuberculosis infection skin test. Latent Tuberculosis Infection,Infection, Latent Tuberculosis,Infections, Latent Tuberculosis,Latent Tuberculoses,Latent Tuberculosis Infections,Tuberculoses, Latent,Tuberculosis Infection, Latent,Tuberculosis Infections, Latent,Tuberculosis, Latent

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