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Tuberculosis and HIV Coinfection

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https://www.readbyqxmd.com/read/28991491/nanowire-aptasensors-for-electrochemical-detection-of-cell-secreted-cytokines
#1
Ying Liu, Ali Rahimian, Sergiy Krylyuk, Tam Vu, Bruno Crulhas, Gulnaz Stybayeva, Meruyert Imanbekova, Dong-Sik Shin, Albert Davydov, Alexander Revzin
Cytokines are small proteins secreted by immune cells in response to pathogens/infections; therefore, these proteins can be used in diagnosing infectious diseases. For example, release of a cytokine interferon (IFN)-γ from T-cells is used for blood-based diagnosis of tuberculosis (TB). Our lab has previously developed an atpamer-based electrochemical biosensor for rapid and sensitive detection of IFN-γ. In this study, we explored the use of silicon nanowires (NWs) as a way to create nanostructured electrodes with enhanced sensitivity for IFN-γ...
October 9, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28955338/cellular-architecture-of-spinal-granulomas-and-the-immunological-response-in-tuberculosis-patients-coinfected-with-hiv
#2
Debapriya Bhattacharya, Siva Danaviah, Daniel M Muema, Ngomu Akeem Akilimali, Prashini Moodley, Thumbi Ndung'u, Gobardhan Das
Mycobacterium tuberculosis (M.tb) and HIV are individually responsible for the most deaths worldwide among all infectious agents, and coinfection with M.tb and HIV is a significant public health challenge in the developing world. Although the lung is the primary target organ for tuberculosis (TB), M.tb can also cause extrapulmonary tuberculosis (EPTB) such as in the bones and joints. Treatment of EPTB is much more challenging than treatment of pulmonary TB. The hallmark of the host immune response against TB is the formation of organized structures called granulomas that are infiltrated with immune cells and are rich in cytokines and chemokines...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28946393/cell-wall-a-versatile-fountain-of-drug-targets-in-mycobacterium-tuberculosis
#3
REVIEW
Zubair Shanib Bhat, Muzafar Ahmad Rather, Mubashir Maqbool, Hafiz Ul Lah, Syed Khalid Yousuf, Zahoor Ahmad
Tuberculosis is the leading infectious disease responsible for an estimated one and a half million human deaths each year around the globe. HIV-TB coinfection and rapid increase in the emergence of drug resistant forms of TB is a dangerous scenario. This underlines the urgent need for new drugs with novel mechanism of action. A plethora of literature exist that highlight the importance of enzymes involved in the biosynthesis of mycobacterial cell wall responsible for its survival, growth, permeability, virulence and resistance to antibiotics...
September 21, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28934422/low-frequency-of-acquired-isoniazid-and-rifampicin-resistance-in-rifampicin-susceptible-pulmonary-tuberculosis-in-a-setting-of-high-hiv-1-infection-and-tuberculosis-coprevalence
#4
Neesha Rockwood, Frederick Sirgel, Elizabeth Streicher, Robin Warren, Graeme Meintjes, Robert J Wilkinson
Background: We estimated the incidence of acquired isoniazid and rifampicin resistance in rifampicin-susceptible tuberculosis in a setting of high human immunodeficiency virus type 1 (HIV-1) infection and tuberculosis coprevalence. Methods: GeneXpert MTB/RIF-confirmed patients with rifampicin-susceptible tuberculosis were recruited at antituberculosis treatment initiation in Khayelitsha, South Africa. Liquid culture and adherence assessment were performed at 2 and 5-6 months...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28928173/cohort-profile-of-a-study-on-outcomes-related-to-tuberculosis-and-antiretroviral-drug-concentrations-in-uganda-design-methods-and-patient-characteristics-of-the-south-study
#5
Christine Sekaggya-Wiltshire, Barbara Castelnuovo, Amrei von Braun, Joseph Musaazi, Daniel Muller, Allan Buzibye, Ursula Gutteck, Lars Henning, Bruno Ledergerber, Natascia Corti, Mohammed Lamorde, Jan Fehr, Andrew Kambugu
PURPOSE: Tuberculosis (TB) is a leading cause of death among people living with HIV in sub-Saharan Africa. Several factors influence the efficacy of TB treatment by leading to suboptimal drug concentrations and subsequently affecting treatment outcome. The aim of this cohort is to determine the association between anti-TB drug concentrations and TB treatment outcomes. PARTICIPANTS: Patients diagnosed with new pulmonary TB at the integrated TB-HIV outpatient clinic in Kampala, Uganda, were enrolled into the study and started on first-line anti-TB treatment...
September 18, 2017: BMJ Open
https://www.readbyqxmd.com/read/28919720/text-messaging-to-decrease-tuberculosis-treatment-attrition-in-tb-hiv-coinfection-in-uganda
#6
Sabine M Hermans, Sawsan Elbireer, Harriet Tibakabikoba, Bas J Hoefman, Yukari C Manabe
BACKGROUND: Low tuberculosis (TB) treatment completion rates in sub-Saharan Africa are an important driver of multidrug resistance. Mobile technology-based interventions have been shown to improve adherence to antiretroviral therapy in sub-Saharan Africa. We aimed to test the effect of a short-message service (SMS) intervention on loss to follow-up (LFU). MATERIALS AND METHODS: In this quasi-experimental study, all adult, literate, HIV-infected patients with mobile phone access diagnosed with TB between November 2010 and October 2011 in an urban clinic in Uganda were eligible to receive adherence and appointment reminders and educational quizzes during the first 8 weeks of TB treatment...
2017: Patient Preference and Adherence
https://www.readbyqxmd.com/read/28861087/alanine-mutagenesis-in-the-complementarity-determining-region-3-of-the-mtb-and-hiv-1-peptide-bispecific-t-cell-receptor-beta-chain-affects-ligand-recognition
#7
Chao-Ying Zhou, Rui-Ning Wang, Qian Wen, Wen-Ting He, Shi-Meng Zhang, Xia-Lin Du, Jia-Hui Yang, Li Ma
Mycobacterium tuberculosis/human immunodeficiency virus (MTB/HIV) coinfection presents a special challenge to the prevention and treatment of tuberculosis and HIV/AIDS. Adoptive transfer of high-affinity T cell receptor (TCR) gene-modified T cells against MTB and HIV antigens is a promising approach to treating MTB/HIV coinfected patients whose cellular immunity is obviously disordered. We have previously successfully identified that a bispecific TCR screened out from peripheral blood mononuclear cells of a HLA-A*0201(+) healthy individual using the complementarity determining region 3 (CDR3) spectratype analysis recognizes both MTB Ag85B199-207 and HIV-1 Env120-128 peptide...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28829824/a-syndemic-approach-to-assess-the-effect-of-substance-use-and-social-disparities-on-the-evolution-of-hiv-hcv-infections-in-british-columbia
#8
Zahid Ahmad Butt, Nabin Shrestha, Stanley Wong, Margot Kuo, Dionne Gesink, Mark Gilbert, Jason Wong, Amanda Yu, Maria Alvarez, Hasina Samji, Jane A Buxton, James C Johnston, Victoria J Cook, David Roth, Theodora Consolacion, Michelle Murti, Travis S Hottes, Gina Ogilvie, Robert Balshaw, Mark W Tyndall, Mel Krajden, Naveed Z Janjua
BACKGROUND: Co-occurrence of social conditions and infections may affect HIV/HCV disease risk and progression. We examined the changes in relationship of these social conditions and infections on HIV and hepatitis C virus (HCV) infections over time in British Columbia during 1990-2013. METHODS: The BC Hepatitis Testers Cohort (BC-HTC) includes ~1.5 million individuals tested for HIV or HCV, or reported as a case of HCV, HIV, HBV, or tuberculosis linked to administrative healthcare databases...
2017: PloS One
https://www.readbyqxmd.com/read/28794177/discovery-and-validation-of-a-six-marker-serum-protein-signature-for-the-diagnosis-of-active-pulmonary-tuberculosis
#9
Mary A De Groote, David G Sterling, Thomas Hraha, Theresa M Russell, Louis S Green, Kirsten Wall, Stephan Kraemer, Rachel Ostroff, Nebojsa Janjic, Urs A Ochsner
New non-sputum biomarker tests for active tuberculosis (TB) diagnostics are of the highest priority for global TB control. We performed in-depth proteomic analysis using the 4,000-plex SOMAscan assay on 1,470 serum samples from seven countries where TB is endemic. All samples were from patients with symptoms and signs suggestive of active pulmonary TB that were systematically confirmed or ruled out for TB by culture and clinical follow-up. HIV coinfection was present in 34% of samples, and 25% were sputum smear negative...
October 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28760884/hiv-1-infection-is-associated-with-depletion-and-functional-impairment-of-mycobacterium-tuberculosis-specific-cd4-t-cells-in-individuals-with-latent-tuberculosis-infection
#10
Cheryl L Day, Deborah A Abrahams, Levelle D Harris, Michele van Rooyen, Lynnett Stone, Marwou de Kock, Willem A Hanekom
Coinfection with HIV is the single greatest risk factor for reactivation of latent Mycobacterium tuberculosis infection (LTBI) and progression to active tuberculosis disease. HIV-associated dysregulation of adaptive immunity by depletion of CD4 Th cells most likely contributes to loss of immune control of LTBI in HIV-infected individuals, although the precise mechanisms whereby HIV infection impedes successful T cell-mediated control of M. tuberculosis have not been well defined. To further delineate mechanisms whereby HIV impairs protective immunity to M...
September 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28744153/assessment-of-sputum-smear-positive-but-culture-negative-results-among-newly-diagnosed-pulmonary-tuberculosis-patients-in-tanzania
#11
Nicholaus Peter Mnyambwa, Esther S Ngadaya, Godfather Kimaro, Dong-Jin Kim, Rudovick Kazwala, Pammla Petrucka, Sayoki G Mfinanga
Diagnosis of pulmonary tuberculosis (TB) in technology-limited countries is widely achieved by smear microscopy, which has limited sensitivity and specificity. The frequency and clinical implication of smear-positive but culture-negative among presumptive TB patients remains unclear. A cross-sectional substudy was conducted which aimed to identify the proportion of nontuberculous mycobacteria (NTM) infections among 94 "smear-positive culture-negative" patients diagnosed between January 2013 and June 2016 in selected health facilities in Tanzania...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/28739783/effect-of-rifampin-on-the-single-dose-pharmacokinetics-of-oral-cabotegravir-in-healthy-subjects
#12
S L Ford, K Sutton, Y Lou, Z Zhang, A Tenorio, C Trezza, P Patel, W Spreen
Drug-drug interactions between antiretroviral medications and rifampin complicate the treatment of HIV and tuberculosis coinfection. This study evaluated the effect of rifampin on the pharmacokinetics of oral cabotegravir, an integrase strand transfer inhibitor being investigated for long-acting treatment and prevention of HIV-1 infection. This was a phase I, single-center, open-label, fixed-sequence crossover study in healthy adults. The objective was to evaluate the effect of steady-state rifampin on the single-dose plasma pharmacokinetics of cabotegravir...
October 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28719322/case-report-disseminated-talaromyces-penicillium-marneffei-and-mycobacterium-tuberculosis-coinfection-in-a-japanese-patient-with-acquired-immunodeficiency-syndrome
#13
Shuji Hatakeyama, Takeshi Yamashita, Toshiyasu Sakai, Katsuhiko Kamei
Talaromyces marneffei is a dimorphic fungus endemic mainly in southeast and south Asia. It causes severe mycosis, usually in immunocompromised individuals, such as those with human immunodeficiency virus (HIV) infection. Concomitant infection with T. marneffei and other opportunistic pathogens is plausible because the majority of T. marneffei infections occur in patients with advanced HIV infection. Nonetheless, coinfection in the same site has rarely been reported, and poses a considerable diagnostic and therapeutic challenge...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28690879/epidemiological-characteristics-and-clinical-outcome-of-hiv-related-tuberculosis-in-a-population-of-tb-patients-in-south-western-nigeria
#14
Olugbenga A Olowe, Olufunmilola B Makanjuola, Adeniyi S Adekanmi, Olusola J Adefioye, Rita A Olowe
Tuberculosis (TB) is the second leading cause of death from infectious disease globally with its impact more dramatic in resource limited settings. Individuals with human immunodeficiency virus (HIV) infection who also develop tuberculosis represent a significant challenge to TB control. This study was carried out to determine the prevalence of TB-HIV coinfection and pattern of infection among TB patients. We also compared treatment outcome among coinfected patients with those not coinfected. A six-year retrospective review of records of patients managed at the Tuberculosis Treatment Center of the LAUTECH Teaching Hospital, South-Western Nigeria from January 2009 to December 2014 was carried out...
June 2017: European Journal of Microbiology & Immunology
https://www.readbyqxmd.com/read/28675626/epidemiology-of-tuberculosis-and-hiv-coinfections-in-singapore-2000-2014
#15
K Nandar, L W Ang, J Tey, L James, K M Kyi Win, Cbe Chee, O T Ng, J L Cutter, Y T Wang
Cross-matching of records between Singapore's tuberculosis and HIV registries showed that 3.3% of individuals with tuberculosis (TB) were coinfected with HIV (2000-2014), the TB incidence among individuals with HIV infection was 1.65 per 100 person-years, and 53% of coinfections were diagnosed within 1 month of each other. The findings supported joint prevention programmes for early diagnosis and treatment.
July 4, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28670408/epidemiology-of-musculoskeletal-tuberculosis-in-an-area-with-high-disease-prevalence
#16
Michael F G Held, Sven Hoppe, Maritz Laubscher, Stewart Mears, Stewart Dix-Peek, Heather J Zar, Robert N Dunn
STUDY DESIGN: Retrospective observational study. PURPOSE: The aim of this study was to assess the distribution of age and site of infection in patients with musculoskeletal tuberculosis (TB) and determine the number of TB/human immunodeficiency virus (HIV) coinfections as well as the incidence of multidrugresistant (MDR) TB. OVERVIEW OF LITERATURE: Of all TB cases, 1%-3% show skeletal system involvement and 30% are HIV coinfected. Although the reported distribution of skeletal TB is majorly in the spine, followed by the hip, knee, and foot/ankle, the epidemiology of extrapulmonary TB and especially musculoskeletal TB remains largely unknown, particularly in areas with a high prevalence of the disease...
June 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28658113/the-changing-epidemiology-of-tuberculosis-in-a-spanish-tertiary-hospital-1995-2013
#17
Andrés González-García, Jesús Fortún, Enrique Elorza Navas, Pilar Martín-Dávila, Marta Tato, Enrique Gómez-Mampaso, Santiago Moreno
Important epidemiological changes and improvement of new diagnostic approaches, mainly molecular tools, might have impacted the management and outcome of tuberculosis (TB) in the last years in industrialized countries. In order to describe the epidemiological trends, and changes in clinical, diagnostic, and therapeutic aspects in patients with TB, an observational study was performed in a tertiary hospital in Western Europe (Madrid, Spain).All adult patients (>16 years) with a diagnosis of TB in the period 1995 to 2013 were included in the study...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28646367/ifn%C3%AE-producing-cd4-t-lymphocytes-the-double-edged-swords-in-tuberculosis
#18
Pawan Kumar
IFNγ-producing CD4(+) T cells (IFNγ(+)CD4(+) T cells) are the key orchestrators of protective immunity against Mycobacterium tuberculosis (Mtb). Primarily, these cells act by enabling Mtb-infected macrophages to enforce phagosome-lysosome fusion, produce reactive nitrogen intermediates (RNIs), and activate autophagy pathways. However, TB is a heterogeneous disease and a host of clinical and experimental findings has also implicated IFNγ(+)CD4(+) T cells in TB pathogenesis. High frequency of IFNγ(+)CD4(+) T cells is the most invariable feature of the active disease...
December 2017: Clinical and Translational Medicine
https://www.readbyqxmd.com/read/28614446/-factors-associated-with-tb-hiv-coinfection-evidence-from-notification-data-in-the-state-of-amazonas-brazil-2001-2012
#19
Evela da Silva Magno, Valeria Saraceni, Alexandra Brito de Souza, Regma da Silva Magno, Maria das Graças Gomes Saraiva, Samira Bührer-Sékula
Tuberculosis (TB) in persons living with HIV (PLHIV) is the leading infectious cause of AIDS-related death. The aim of this study was to estimate the prevalence of TB/HIV coinfection, evaluate notification of the two diseases over time by probabilistic database linkage, and identify factors associated with AIDS and TB notifications. Prevalence of TB/HIV coinfection was 7.7%. The group of PLHIV with subsequent TB diagnosis was the most representative, despite available preventive measures. Underreporting of TB among AIDS cases was 35%, and 19...
June 12, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/28592547/performance-of-the-abbott-realtime-mtb-and-mtb-rif-inh-assays-in-a-setting-of-high-tuberculosis-and-hiv-coinfection-in-south-africa
#20
Lesley Scott, Anura David, Lara Noble, Matilda Nduna, Pedro Da Silva, Andrew Black, Francois Venter, Wendy Stevens
South Africa is a country with a high incidence of tuberculosis (TB), complicated by coinfection with human immunodeficiency virus (HIV). The Xpert MTB/RIF (Cepheid, Sunnyvale, CA, USA) is used in South Africa as the test for the initial diagnosis of TB, and other molecular platforms such as the m2000 (Abbott Molecular, Des Plaines, IL, USA) are widely used for molecular monitoring of HIV load. The latter platform is now also equipped with the RealTime (RT) MTB and RealTime MTB RIF/INH assays for TB and first-line drug resistance screening but has not been evaluated in settings of HIV and TB coinfection...
August 2017: Journal of Clinical Microbiology
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