ESAT

Background: Post pulmonary tuberculosis (TB) patients could experience pulmonary function declines which affected their quality of life. Obstrucitve abnormalities were found the most after complete TB treatment and the therapeutic guidelines focused in bronchodilators. The use of bronchodilators could improve lung function and quality of life in post TB patients with obstructive abnormalities. Tiotropium is a bronchodilator that has been shown to be effective in chronic obstructive pulmonary disease (COPD) patients, while its use in post TB patients has not been widely studied. Methods: This study design was a clinical trial with pre and post test design in post TB patients in Dr.M.Djamil Padang General Hospital and Lubuk Alung Pulmonary Hospital conducted from November 2016 to June 2017. Results: Of 30 post TB patients, the mean age was 62.77±10.99 years, most were male (63.33%), non-smokers and former smokers (50% each), had interval from complete anti TB drugs to study ≥6 months ...

Tuberculosis is a major global threat to human health. Since the widely used BCG vaccine is poorly effective in adults, there is a demand for the development of a new type of boost tuberculosis vaccine. We designed a novel intranasal tuberculosis vaccine candidate, TB/FLU-04L, which is based on an attenuated influenza A virus vector encoding two mycobacterium antigens, Ag85A and ESAT-6. As tuberculosis is an airborne disease, the ability to induce mucosal immunity is one of the potential advantages of influenza vectors. Sequences of ESAT-6 and Ag85A antigens were inserted into the NS1 open reading frame of the influenza A virus to replace the deleted carboxyl part of the NS1 protein. The vector expressing chimeric NS1 protein appeared to be genetically stable and replication-deficient in mice and non-human primates. Intranasal immunization of C57BL/6 mice or cynomolgus macaques with the TB/FLU-04L vaccine candidate induced Mtb-specific Th1 immune response. Single TB/FLU-04L immuniza...

ABSTRACTESAT-6 is an important T-cell antigen recognized by protective T cells in animal models of infection withMycobacterium tuberculosis. In an enzyme-linked immunosorbent assay (ELISA) with overlapping peptides spanning the sequence of ESAT-6, monoclonal antibody HYB76-8 reacted with two peptides in the N-terminal region of the molecule. Assays with synthetic truncated peptides allowed a precise mapping of the epitope to the residues EQQWNFAGIEAAA at positions 3 to 15. Hydrophilicity plots revealed one hydrophilic area at the N terminus and two additional areas further along the polypeptide chain. Antipeptide antibodies were generated by immunization with synthetic 8-mer peptides corresponding to these two regions coupled to keyhole limpet hemocyanin. Prolonged immunization with a 23-mer peptide (positions 40 to 62) resulted in the formation of antibodies reacting with the peptide as well as native ESAT-6. A double-antibody ELISA was then developed with monoclonal antibody HYB76...

The tuberculin skin test (TST) is used for the identification of latent tuberculosis (TB) infection (LTBI) but lacks specificity in Mycobacterium bovis BCG-vaccinated individuals, who constitute an increasing proportion of TB patients and their contacts from regions where TB is endemic. In previous studies, T-cell responses to ESAT-6 and CFP-10, M. tuberculosis -specific antigens that are absent from BCG, were sensitive and specific for detection of active TB. We studied 44 close contacts of a patient with smear-positive pulmonary TB and compared the standard screening procedure for LTBI by TST or chest radiographs with T-cell responses to M. tuberculosis -specific and nonspecific antigens. Peripheral blood mononuclear cells were cocultured with ESAT-6, CFP-10, TB10.4 (each as recombinant antigen and as a mixture of overlapping synthetic peptides), M. tuberculosis sonicate, purified protein derivative (PPD), and short-term culture filtrate, using gamma interferon production as the r...

Tuberculosis adalah penyakit yang disebabkan oleh bakteri Tuberculosis yang mudah menular dan menyerang sistem organ paru. Infeksi TB juga disebabkan karena terjadinya penurunan sistem imun. Interleukin-10 merupakan sitokin anti inflammatory.Sitokin yang diproduksi oleh makrofag dan sel T selama infeksi TB.Dalam lingkup penyakit infeksi,sel T regulator merupakan sumber utama IL- 10. Obat Anti Tuberculosis (OAT) merupakan antibiotik yang sering di gunakan pada pengobatan pasien Tuberculosis. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian Obat Anti Tuberculosis sebagai imunomodulator pada pasien dengan Tuberculosis. Metode yang digunakan pada penelitian ini yaitu Studi Literature dengan melakukan pencarian jurnal pada database Google Scholar,Pubmed, dan Science Direct dalam rentang waktu 2011-2020 dengan menggunakan metode PICO.Jurnal yang dicari yaitu tentang penelitian pengukuran kadar Interleukin-10 pada pasien dengan Tuberculosis. Berdasarkan hasil penelusuran Litera...

BackgroundMycobacterium tuberculosis(Mtb) causes death of 2–3 million people every year. The persistence of the pathogenic mycobacteria inside the macrophage occurs through modulation of host cell signaling which allows them, unlike the other non-pathogenic species, to survive inside the host. The secretory proteins ofM. tuberculosishave gained attention in recent years both as vaccine candidates and diagnostic tools; they target the immune system and trigger a putatively protective response; however, they may also be involved in the clinical symptoms of the disease.ResultsOur studies showed that RD-1-encoded secretory protein ESAT-6 is involved in modulation of the mitogen-activated protein (MAP) kinase-signaling pathway inside the macrophage. ESAT-6 induced phosphorylation of extracellular signal-regulated kinases 1/2 (ERK1/2) in the cytoplasm but not in the nucleus, which normally is the case for MAP kinases. ESAT-6 also antagonized LPS-induced ERK1/2 phosphorylation in the nucle...

Background: Tuberculosis is a disease with high morbidity, caused mainly by Mycobaterium tuberculosis (M.tb.). DNA vaccines show a promising future due to their unique advantages over conventional methods. The early-secreted antigen target (ESAT)-6 and culture filtrate protein (CFP)-10 of M.tb. antigens have been identified as vaccine candidates against Mycobacteria and used as subunit vaccines, DNA or protein, in different studies. Objective: To investigate the potential of pcDNA3.1+ plasmid containing CFP-10 and ESAT-6 genes in induction of local immune responses after intramuscular injection in BALB/c mice. Methods: pcDNA 3.1+ CFP-10 and pcDNA3.1+ ESAT-6 plasmids were prepared and defined groups of mice were injected intramuscularly with the plasmids both separately and in combination. The RNA was extracted from muscles after one month and cDNA was made using RT-PCR. The expressions of IL-4, IL-10 and IFN-γ genes cytokines were evaluated using comparative real time PCR. Results: Expression of IL-4 and IL-10 increased in the injection site of the mice groups which received plasmids encoding ESAT-6 and CFP-10 individually or together. More than 10-fold increase in IFN-γ expression was found in samples taken from mice groups inoculated by plasmids encoding ESAT-6 and CFP-10 individually or together. Conclusion: pcDNA 3.1+ESAT-6 and pcDNA3.1+CFP-10 plasmids can increase the expression of IFN-γ in mice after immunization.

BACKGROUND: Indonesia is in the second rank for the most TB (Tuberculosis) cases in the world after India. It is estimated that there are 1 million cases per year in Indonesia. AIM: To find out the influence of Vitamin A supplementation in the medication of pulmonary TB on the acceleration of sputum conversion time at an intensive phase in the Working Area of Puskesmas in Medan Kota Subdistrict METHODS: This research was Quasi Experiment method. With two groups. The samples were 30 newly diagnosed pulmonary TB patients consisting of of15 patients in the treatment group and 15 patients in the control group. The statistical data were analysed with t independent test, significance 95% (p < 0.05) RESULTS: The treatment group discovered that they were mostly 18-27 years old 40.0%, male 73.3%, mostly university students 26.7%, had BTA conversion in the second week 80.0%; and the sputum conversion time was 2.4 weeks in average. The results of the research on the control group demonstrat...

There is a need for reliable markers to diagnose active and latent tuberculosis (TB). The interferon gamma release assays (IGRAs) are compared to the tuberculin skin test (TST) more specific, but cannot discriminate between recent or remote TB infection. Here the Flow-cytometric Assay for Specific Cell-mediated Immune-response in Activated whole blood (FASCIA), which quantifies expanded T-lymphoblasts by flow-cytometric analysis after long-term antigen stimulation of whole blood, is combined with cytokine/chemokine analysis in the supernatant by multiplex technology for diagnosis of Mycobacterium tuberculosis (Mtb) infection. Consecutive patients with suspected TB (n = 85), with microbiologically verified active pulmonary TB (n = 33), extra pulmonary TB (n = 21), clinical TB (n = 11), presumed latent TB infection (LTBI) (n = 23), patients negative for TB (n = 8) and 21 healthy controls were studied. Blood samples were analyzed with FASCIA and multiplex technology to determine and co...

The early diagnosis of definite tuberculous meningitis (TBM) is very important in reducing its mortality. The current gold standard ofTBM relies on the isolation of M. tuberculosis from cerebrospinal fluid (CSF) either with direct staining or M. tuberculosis culture, but theseexamination have a low sensitivity due to the pausibasilary condition. Recently there is an assay using rapid Immunochromatography(ICT) cocktail antigen TB in CSF to diagnose TBM. This method can detect ESAT-6, CFP-10 and MPT-64 antigen as an important virulencefactor for the spreading of bacteria to extra pulmonary which is secreted by M. tuberculosis in CSF from TBM patient. The aim of thisstudy was to know the validity of rapid ICT cocktail antigen TB using CSF against MODS culture and acid-fast bacili as a gold standardto diagnose TBM by analyzing. This study iscarried out by a descriptive observational study using cross sectional study design. Thesubjects are patients who were diagnosed as suspected TBM ba...

Objective: Rapid and accurate TB diagnostics play an important role in detecting the disease. Currently, antigens secreted (ESAT-6, CFP-10 and MPT64) by M. tuberculosis and encoded by genes “Region of Difference” (RD)1, RD2 and RD3 give an opportunity for rapid TB diagnosis. Genomic region RD1-RD3 was deleted in M. bovis BCG strains and absent in mycobacteria other than M. tuberculosis. This property is advantageous because it enable to create a specific diagnostic tools for M. tuberculosis infection. The aim of this study is to determine the validity of TB antigens cocktail (ESAT-6, CFP-10 and MPT64) for pulmonary tuberculosis and TB meningitis diagnosis. Methods: This is a descriptive observational study design. The study was conducted at the Clinical Pathology Laboratory of Dr. Hasan Sadikin General Hospital during September 2012 until March 2013 for the pulmonary tuberculosis study and from January 2014 to May 2014 for the TB meningitis study. The TB antigen cocktail rapid immun...

The aim of this study was to define epitopes of Mycobacterium bovis from ESAT-6 (early secretory antigen of 6 kDa) recognized by CD8+ T lymphocytes from cows naturally infected with Mycobacterium bovis. We found that bovine CD8+ T cells recognized 10 out of 11 ESAT-6 peptides tested.

Human and bovine tuberculosis have long been detected by skin testing with purified protein derivative (PPD), a complex mix of partly denatured mycobacterial antigens with suboptimal specificity. In the present study, skin tests based on ESAT-6, a recombinantly produced antigen highly specific for tuberculosis infection, were investigated. Although ESAT-6 was strongly recognized in vitro and induced high levels of gamma interferon, initial investigations demonstrated that higher doses of ESAT-6 than of PPD were needed to induce substantial delayed-type hypersensitivity reactions. Also, the kinetics of the skin test response differed for the two reagents; PPD showed maximal response at 72 h, but the response to ESAT-6 often peaked later at 96 h. Tests based on an optimized strategy (400 μg of ESAT-6 measured between 72 and 96 h), in cattle infected with Mycobacterium bovis ( n = 22) and animals sensitized by exposure to environmental mycobacteria showed ESAT-6 to have a promising dia...

Background: Toxoplasma gondii is a species that is able to modulate its host immune system. T.gondii infection causes an increased Th1 response to produce IFNγ, TNFα and IL-12 secreted by T. IFNγ lymphocytes which are activated and cause increased production of Nitric Oxide (NO) which can cause cell apoptosis and IFNγ can destroy T.gondii with several mechanisms. The aim of this study was to determine IFN levels in patients with positive IgG and asymptomatic IgG toxoplasmosis.Methods: Case control research with experimental laboratories that use human blood as the object of research. The subjects were initially checked for blood with IgG Rapid Test to determine the positive or negative Toxoplasma infection. IFNγ levels are checked by the ELISA method. To analyze the average comparison of IFNγ levels using computer software. Test the data normality with Saphiro-wilk and comparison of IFNγ levels with Wilcoxon test.Results: IFNγ levels in the negative IgG group (4.69) were slightly lo...