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tbc and tnf

Weixun Zhou, Yan Huang, Jinping Lai, Jun Lu, Michael Feely, Xiuli Liu
An increasing number of drugs including monoclonal antibodies and small molecules, either anti-inflammatory or immunity-enhancing, have been developed to treat human diseases and the number of medications in these classes is likely to expand in the future. The two most commonly used categories of such therapies are the anti-inflammatory group (anti- tumor necrosis factor (TNF) α, anti-interleukins/interleukin receptors, and anti-integrin bodies) and the anti-tumoral agents (immune checkpoint inhibitors, anti-CD20, and anti-endothelial growth factor)...
June 2018: Gastroenterology Research
Przemyslaw J Kotyla
Treatment with anti-TNF-α (tumor necrosis factor), one of the pivotal cytokines, was introduced to clinical practice at the end of last century and revolutionized the treatment of rheumatoid arthritis (RA) as well as many other inflammatory conditions. Such a treatment may however bring many safety issues regarding infections, tuberculosis, as well as cardiovascular diseases, including heart failure. Given the central role of proinflammatory cytokines in RA, atherosclerosis, and congestive heart failure (CHF), such a treatment might result in better control of the RA process on the one side and improvement of heart function on the other...
June 12, 2018: International Journal of Molecular Sciences
P Rodríguez-Jiménez, I Mir-Viladrich, P Chicharro, G Solano-López, F J López-Longo, C Taxonera, P Sánchez-Martínez, X Martínez-Lacasa, M García-Gasalla, J Dorca, M Arias-Guillén, J M García-García, E Dauden
Patients with chronic inflammatory diseases being treated with immunosuppressive drugs, and with tumor necrosis factor inhibitors in particular, have an increased risk of infection by Mycobacterium tuberculosis. Screening for latent tuberculosis infection and preventive therapy to reduce the risk of progression to active tuberculosis are mandatory in this group of patients. This updated multidisciplinary consensus document presents the latest expert opinions on the treatment and prevention of tuberculosis in candidates for biologic therapy and establishes recommendations based on current knowledge relating to the use of biologic agents...
June 2, 2018: Actas Dermo-sifiliográficas
Jennifer A Juno, Jillian L M Waruk, Kathleen M Wragg, Christine Mesa, Carmen Lopez, Joe Bueti, Stephen J Kent, T Blake Ball, Sandra A Kiazyk
Background: End-stage renal disease (ESRD) is associated with an increased susceptibility to infectious diseases, including infection with Mycobacterium tuberculosis (Mtb) . Mucosal-associated invariant T (MAIT) cells recognize vitamin B metabolites produced by many bacterial species, including Mtb, and may play an important role in providing protective immunity against tuberculosis infection in the lung. To date, little is known about MAIT cell frequency, phenotype, or function in ESRD patients...
2018: Frontiers in Immunology
Maha Ahmed Al-Mozaini, Anthony G Tsolaki, Munirah Abdul-Aziz, Suhair M Abozaid, Mohammed N Al-Ahdal, Ansar A Pathan, Valarmathy Murugaiah, Evgeny M Makarov, Anuvinder Kaur, Robert B Sim, Uday Kishore, Lubna Kouser
Mycobacterium tuberculosis can proficiently enter macrophages and diminish complement activation on its cell surface. Within macrophages, the mycobacterium can suppress macrophage apoptosis and survive within the intracellular environment. Previously, we have shown that complement regulatory proteins such as factor H may interfere with pathogen-macrophage interactions during tuberculosis infection. In this study, we show that Mycobacterium bovis BCG binds properdin, an upregulator of the complement alternative pathway...
2018: Frontiers in Immunology
Ivan Bastian, Chris Coulter
Interferon-y release assays (IGRAs), such as the Quantiferon (QIFN) TB-Gold Plus assay (Qiagen, Hilden, Germany) and the T-SPOT.TB test (Oxford Immunotec Limited, Abingdon, United Kingdom), are marketed as a substitute for the tuberculin skin test (TST) for the detection of latent tuberculosis infection (LTBI). The relative merits of IGRAs and TST have been hotly debated over the last decade. The specificity of IGRAs has been optimised by using Mycobacterium tuberculosis-specific antigens. However, IGRAs are functional in vitro T-cell-based assays that may lack reproducibility due to specimen collection, transport, processing and kit manufacturing issues...
December 1, 2017: Communicable Diseases Intelligence Quarterly Report
Soichiro Sawamura, Takamitsu Makino, Takamitsu Johno, Junji Yamashita, Daisuke Niimori, Satoshi Fukushima, Hironobu Ihn
Although tumor necrosis factor (TNF)-α inhibitors are effective in patients with rheumatoid arthritis (RA), an increased risk of infections often becomes a serious problem. It is well known that TNF-α inhibitors increase the risk of tuberculosis, but extrapulmonary tuberculosis often induced by them is difficult to diagnose using routine imaging examinations. We described a case of delayed diagnosis of a tuberculous lymphadenitis in a patient with RA treated with TNF-α inhibitor because of the complications of severe bacterial sepsis...
May 2018: Intractable & Rare Diseases Research
Delia Goletti, Linda Petrone, Giuseppe Ippolito, Laura Niccoli, Carlotta Nannini, Fabrizio Cantini
Latent tuberculosis infection (LTBI) accounts for almost a quarter of the world population, and, in 5-10% of the subjects with impaired immune-response against M. tuberculosis growth, it may progress to active tuberculosis (TB). In this review, we focus on the need to propose a screening for LTBI including preventive therapy offer in rheumatic patients undergoing therapy with biological drugs. Areas covered: We report on evidence that biologics are associated with an increased risk of active TB reactivation...
June 12, 2018: Expert Review of Anti-infective Therapy
Yiming Kou, Mingming Wan, Wei Shi, Jie Liu, Zhilei Zhao, Yongqing Xu, Wei Wei, Bo Sun, Feng Gao, Linjun Cai, Chunlai Jiang
Tuberculosis (TB) remains a serious health issue around the word. Adenovirus (Ad)-based vaccine and modified vaccinia virus Ankara (MVA)-based vaccine have emerged as two of the most promising immunization candidates over the past few years. However, the performance of the homologous and heterologous prime-boost immunization regimens of these two viral vector-based vaccines remains unclear. In the present study, we constructed recombinant Ad and MVA expressing an Ag85B-TB10.4 fusion protein (AdH4 and MVAH4) and evaluated the impact of their different immunization regimens on the humoral and cellular immune responses...
April 23, 2018: Journal of Microbiology and Biotechnology
Alessandra Romagnoli, Elisa Petruccioli, Ivana Palucci, Serena Camassa, Elisabetta Carata, Linda Petrone, Stefania Mariano, Michela Sali, Luciana Dini, Enrico Girardi, Giovanni Delogu, Delia Goletti, Gian Maria Fimia
Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), has infected over 1.7 billion people worldwide and causes 1.4 million deaths annually. Recently, genome sequence analysis has allowed the reconstruction of Mycobacterium tuberculosis complex (MTBC) evolution, with the identification of seven phylogeographic lineages: four referred to as evolutionarily "ancient", and three "modern". The MTBC strains belonging to "modern" lineages appear to show enhanced virulence that may have warranted improved transmission in humans over ancient lineages through molecular mechanisms that remain to be fully characterized...
May 24, 2018: Cell Death & Disease
Jian Shen, Shiyuan Shi, Zhen Lai
BACKGROUND Spinal tuberculosis (STB) is the main cause of bone and joint tuberculosis. This study aimed to screen and analyze the susceptibility genes for STB using whole-exome sequencing (WES). MATERIAL AND METHODS All exon regions of peripheral blood DNA from 6 STB patients were captured and sequenced using WES and the sequencing data were analyzed by modern bioinformatics methods to identify disease-causing mutations. Sanger sequencing was then used to validate the mutation sites in normal controls (207) and STB patients (193)...
May 24, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Elena Dantes, Doina Ecaterina Tofolean, Ariadna Petronela Fildan, Liviu Craciun, Elena Dumea, Ioan Tiberiu Tofolean, Laura Mazilu
Tumour necrosis factor (TNF)-α inhibitors are highly used in Romania for the treatment of autoimmune disorders, such as rheumatoid arthritis (RA), psoriasis, inflammatory bowel diseases, and ankylosing spondylitis. Biological therapy using TNF-α inhibitors is very effective but is associated with an increased risk of opportunistic infections, including active tuberculosis. Here, two cases are presented of patients with RA and psoriasis under biological therapy who developed very aggressive forms of disseminated tuberculosis, with a rapid progression to death...
January 1, 2018: Journal of International Medical Research
Ge Shi, Guofeng Mao, Kejie Xie, Dongdong Wu, Wei Wang
Tuberculosis is chronic respiratory infectious disease and is caused by the infection of Mycobacterium tuberculosis (M.tb). Macrophages play an important role in host immune response against M.tb infection, which is regulated by various factors, including microRNAs (miRNAs). The present study aimed to examine the in vitro functional role of miR-1178 in mycobacterial survival and inflammatory responses induced by M.tb infection in human macrophages. Our results showed that M.tb infection increased the expression of miR-1178 in human macrophages (HTP-1 and U937 cells) in a concentration- and time-dependent manner...
May 21, 2018: Journal of Cellular Biochemistry
Chunxiang Bai, Juanjuan He, Hongxia Niu, Lina Hu, Yanping Luo, Xun Liu, Liang Peng, Bingdong Zhu
It is believed that central memory T cells (TCM ) provide long-term protection against tuberculosis (TB). However, the effects of TB subunit vaccine immunization schedule, especially the vaccination intervals, on T cell immune memory is still unclear. In this study, mice were immunized with fusion protein ESAT6-Ag85B-MPT64 (190-198)-Mtb8.4-Rv2626c (LT70) based subunit vaccine three times according to the following schedules: ① 0, 3rd and 6th week respectively (0-3-6w), ② 0, 4th and 12th week (0-4-12w), and ③ 0, 4th and 24th week (0-4-24w)...
May 2018: Tuberculosis
Kamakshi Prudhula Devalraju, Venkata Sanjeev Kumar Neela, Ramulu Gaddam, Arunabala Chaudhury, Abhinav Van, Siva Sai Krovvidi, Ramakrishna Vankayalapati, Vijaya Lakshmi Valluri
HIV infection markedly increases the likelihood of latent tuberculosis infection progressing to active TB. Information on expression of TLR-2, myeloid differentiation factor (MyD88), IL-1R- associated kinase-4 (IRAK4) and nuclear factor kappa B (NF-kB) in HIV+LTBI+ and HIV+ patients with active TB disease is limited. We found significantly higher percentages of CD14+TLR2+ cells in PBMCs of HIV+LTBI+ patients compared to HIV-LTBI+ individuals. γ-irradiated Mtb was unable to induce MyD88, IRAK4 expression and IL-1β, MCP-1, IP-10 production in HIV+LTBI+ patients...
May 17, 2018: Cytokine
David M Lowe, Julie Demaret, Nonzwakazi Bangani, Justine K Nakiwala, Rene Goliath, Katalin A Wilkinson, Robert J Wilkinson, Adrian R Martineau
Neutrophils exert both positive and negative influences on the host response to tuberculosis, but the mechanisms by which these differential effects are mediated are unknown. We studied the impact of live and dead neutrophils on the control of Mycobacterium tuberculosis using a whole blood bioluminescence-based assay, and assayed supernatant cytokine concentrations using Luminex™ technology and ELISA. CD15+ granulocyte depletion from blood prior to infection with M. tuberculosis -lux impaired control of mycobacteria by 96 h, with a greater effect than depletion of CD4+, CD8+, or CD14+ cells ( p  < 0...
2018: Frontiers in Immunology
José Luis Cabriada, Rafael Ruiz-Zorrilla, Jesús Barrio, Ramón Atienza, Alain Huerta, Iago Rodríguez-Lago, Antonio Bernal, César Herrero
BACKGROUND/AIMS: Screening for latent tuberculosis infection is mandatory before starting anti-tumor necrosis factor therapy. New assays based on interferon-γ (IFN-γ) release have recently become available and may be more accurate. The aim of this study was to compare QuantiFERON-TB and tuberculin skin test in screening for latent infection in patients with inflammatory bowel disease. MATERIALS AND METHODS: We prospectively screened 138 patients with inflammatory bowel disease for latent tuberculosis infection with chest X-ray, tuberculin skin test, and a third-generation QuantiFERON-TB test...
May 2018: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
Andrew R DiNardo, Tomoki Nishiguchi, Emily M Mace, Kimal Rajapakshe, Godwin Mtetwa, Alexander Kay, Gugu Maphalala, W Evan Secor, Rojelio Mejia, Jordan S Orange, Cristian Coarfa, Kapil N Bhalla, Edward A Graviss, Anna M Mandalakas, George Makedonas
Epigenetic mechanisms, such as DNA methylation, determine immune cell phenotype. To understand the epigenetic alterations induced by helminth coinfections, we evaluated the longitudinal effect of ascariasis and schistosomiasis infection on CD4+ T cell DNA methylation and the downstream tuberculosis (TB)-specific and bacillus Calmette-Guérin-induced immune phenotype. All experiments were performed on human primary immune cells from a longitudinal cohort of recently TB-exposed children. Compared with age-matched uninfected controls, children with active Schistosoma haematobium and Ascaris lumbricoides infection had 751 differentially DNA-methylated genes, with 72% hypermethylated...
May 11, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Ji Yeun Kim, Joung Ha Park, Min Chul Kim, Hye Hee Cha, Na-Young Jeon, Seong Yeon Park, Min-Jae Kim, Yong-Phil Chong, Sang Oh Lee, Sang-Ho Choi, Yang Soo Kim, Jun Hee Woo, Sung Han Kim
OBJECTIVES: The IFN-γ-release assay (IGRA) cannot differentiate active tuberculosis (TB) from latent TB infection (LTBI). We hypothesized that the TNF-α-release assay (TARA) combined with IGRA might discriminate active TB from not active TB without LTBI. METHODS: Adult patients with suspected TB, and with unrelated diseases such as herpes zoster as controls, were enrolled in an intermediate TB-burden country. Patients with confirmed or probable TB were regarded as active TB, and patients with not active TB were further classified as those having not active TB with and without LTBI based on IGRA results...
May 7, 2018: Journal of Infection
Tiago E Arantes, Luiz H Lima, Gláucio L Bressanin, Cláudia D Marques, Ângela B Duarte, Cristina Muccioli
PURPOSE: To report unique retinal fundus lesions and treatment outcomes of intraocular tuberculosis in patients under anti-tumor necrosis factor treatment. METHODS: Retrospective review of two patients with laboratorial evidence of tuberculosis who had bilateral ocular signs and symptoms not attributable to other diseases. Multimodal imaging was analyzed at the time of presentation and after the treatment initiation. The study patients underwent standard treatment for tuberculosis...
May 4, 2018: Retinal Cases & Brief Reports
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