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PE17 protein from Mycobacterium tuberculosis enhances Mycobacterium smegmatis survival in macrophages and pathogenicity in mice. 2019

Zhe Li, and Hongxiu Liu, and Huafang Li, and Guanghui Dang, and Ziyin Cui, and Ningning Song, and Quankai Wang, and Siguo Liu, and Liping Chen
College of Animal Science and Technology, Jilin Agricultural University, Changchun, China.

The capacity of Mycobacterium tuberculosis to survive and cause disease is strongly correlated with its ability to escape multiple defense strategies in hosts. In particular, M. tuberculosis has the remarkable capacity to survive within the hostile environment of macrophages. Here, we found that the PE17 (Rv1646) protein promoted intracellular survival of M. smegmatis in peritoneal macrophages from mice. Further experiments confirmed that the recombinant PE17 protein was localized in the cell wall of M. smegmatis. Results from the macrophage infection model showed that PE17 significantly downregulated pro-inflammatory cytokines (interleukin-6, interleukin-12, and tumer necrosis factor-α) secretion from macrophages induced by M. smegmatis and promoted macrophage necrosis. Furthermore, a C57BL/6 mouse infection model confirmed that PE17 significantly prolonged the survival of M. smegmatis in vivo and aggravated lesions in organs of infected mice. Moreover, persistent high levels of interferon-γ and interleukin-1β in infected mice indicated that the bacteria were not easily removed in vivo. Overall, our present results suggested that the PE17 may act as an important pathogenic factor in M. tuberculosis.

UI MeSH Term Description Entries
D007371 Interferon-gamma The major interferon produced by mitogenically or antigenically stimulated LYMPHOCYTES. It is structurally different from TYPE I INTERFERON and its major activity is immunoregulation. It has been implicated in the expression of CLASS II HISTOCOMPATIBILITY ANTIGENS in cells that do not normally produce them, leading to AUTOIMMUNE DISEASES. Interferon Type II,Interferon, Immune,gamma-Interferon,Interferon, gamma,Type II Interferon,Immune Interferon,Interferon, Type II
D007668 Kidney Body organ that filters blood for the secretion of URINE and that regulates ion concentrations. Kidneys
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008168 Lung Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood. Lungs
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
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D009165 Mycobacterium Infections, Nontuberculous Infections with nontuberculous mycobacteria (atypical mycobacteria): M. kansasii, M. marinum, M. scrofulaceum, M. flavescens, M. gordonae, M. obuense, M. gilvum, M. duvali, M. szulgai, M. intracellulare (see MYCOBACTERIUM AVIUM COMPLEX;), M. xenopi (littorale), M. ulcerans, M. buruli, M. terrae, M. fortuitum (minetti, giae), M. chelonae, M. leprae. Mycobacterium Infections, Atypical,Atypical Mycobacterial Infection, Disseminated,Atypical Mycobacterial Infection, Familial Disseminated,Atypical Mycobacteriosis, Familial,Atypical Mycobacteriosis, Familial Disseminated,Atypical Mycobacterium Infections,Infections, Atypical Mycobacterium,Mycobacterium abscessus Infection,Atypical Mycobacterium Infection,Familial Atypical Mycobacterioses,Familial Atypical Mycobacteriosis,Infection, Mycobacterium abscessus,Infections, Mycobacterium abscessus,Mycobacterioses, Familial Atypical,Mycobacteriosis, Familial Atypical,Mycobacterium Infection, Atypical,Mycobacterium Infection, Nontuberculous,Mycobacterium abscessus Infections,Nontuberculous Mycobacterium Infection,Nontuberculous Mycobacterium Infections
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
D011994 Recombinant Proteins Proteins prepared by recombinant DNA technology. Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D002473 Cell Wall The outermost layer of a cell in most PLANTS; BACTERIA; FUNGI; and ALGAE. The cell wall is usually a rigid structure that lies external to the CELL MEMBRANE, and provides a protective barrier against physical or chemical agents. Cell Walls,Wall, Cell,Walls, Cell

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