Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

HLADR expression marks recently divided memory CD4 T cells in latent tuberculosis infected subjects upon in vitro stimulation with Mycobacterium tuberculosis antigens

ABSTRACT: Upon antigen encounter, T cells can rapidly divide and form short-lived effector cells which plays an important role fighting an active infection. However, little is known about the molecular markers that distinguish such effector cells from other T cell populations in humans. Due to previous exposure with Mycobacterium tuberculosis (Mtb), we expect latent tuberculosis infected (LTBI) subjects to have Mtb-specific memory CD4 T cells that are capable of rapid expansion upon antigen re-encounter. To investigate this further we designed an in vitro MTP-AE (Memory T cell Proliferation upon Antigen Exposure) assay to track and isolate proliferated CD4 T cells in response to antigen stimulation. PBMCs from LTBI subjects were cultured with the MTB300 (Mtb specific peptide pool, PMID: 27409590) for 8 days before sorting for HLADR+ vs HLADR- and divided vs undivided CD4 T cells. We found that HLADR is a marker of recently divided memory CD4 T cells and that differentially expessed genes in HLADR+/recently divided cells were enriched for cytotoxic markers and cytokines compared to HLADR-/undivided cells.

ORGANISM(S): Homo sapiens

PROVIDER: GSE162725 | GEO | 2021/05/11

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Expression data from WT and IL-2 secondary CD4 T cell effectors responding towards infuenza A virus infection

Project description:How IL-2 produced by secondary CD4 T cell effectors, derived from resting memory cells, impacts memory CD4 T cell function and survival to memory following antigen re-encounter is unknown. We used microarrays to detail the global programme of gene expression underlying differences between WT and IL-2 deficient secondary CD4 T cell effectors purified from the lung on day 7 following A/PR8/34-OVAII influenza infection. Congenic primed memory DO11.10 TCR trangenic CD4 T cells were sort purifed from the lungs of infected mice on day 7 post infection for RNA extraction and hybridization on Affymetrix microarrays. We sought to obtain only CD4 T cell populations that had entered into the immune response by also sorting and collecting only those cells that had divided at least 5 times by CFSE analysis.

2015-05-14 | E-GEOD-60186 | biostudies-arrayexpress

Identification of latent tuberculosis infection-related microRNAs in human U937 macrophages expressing Mycobacterium tuberculosis Hsp16.3

Project description:Latent tuberculosis infection (LTBI) relies on a homeostasis of macrophages and Mycobacterium tuberculosis (Mtb). The small heat shock protein, Mtb Hsp16.3 (also known as latency-associated antigen), plays an important role in Mtb persistence within macrophages. However, the mechanism of LTBI remains elusive. The aim of this study was to delineate LTBI-related miRNA expression in U937 macrophages expressing Mtb Hsp16.3 protein. This study intends to explore the potential function of miRNAs in the interaction of macrophages with Mtb Hsp16.3 and provide insights for investigating the role of macrophage homeostasis in LTBI. U937 macrophages were infected with an integrase-deficient Lentivirus vector to transiently express Mtb Hsp16.3, and green fluorescent protein (GFP) as a control. We used a microRNA (miRNA) microarray chip containing more than 1000 probes to identify the significant differentially expressed miRNAs in the infected U937 cells, and employed real-time quantitative polymerase chain reaction (qRT-PCR) for validation. Furthermore, we confirmed these candidate LTBI-related miRNAs in peripheral blood mononuclear cells from subjects with LTBI and in healthy control individuals. Functional annotation prediction of miRNA target genes and pathway enrichment analyses were used to explore the putative links between these miRNAs and LTBI.

2014-03-17 | E-GEOD-54630 | biostudies-arrayexpress

Identification of latent tuberculosis infection-related microRNAs in human U937 macrophages expressing Mycobacterium tuberculosis Hsp16.3

2014-03-17 | GSE54630 | GEO

Expression data from WT and IL-2 secondary CD4 T cell effectors responding towards infuenza A virus infection

2015-05-14 | GSE60186 | GEO

Interferon-alpha dendritic cells in active tuberculosis, latent and healthy donors

Project description:Individuals exposed to Mycobacterium tuberculosis (Mtb) may become infected and are classified as with latent tuberculosis infection (LTBI) and remain whole time life in this condition or develop active tuberculosis (TB). Among the multiple factors governing the outcome of the infection, dendritic cells (DC) play a major role in dictating protective immunity. However, current knowledge on the role of the diverse components of human DC in shaping specific T cell response during Mtb infection is limited. In this study, we performed a comparative evaluation of peripheral blood circulating DC subsets along with the functional capability of monocyte-derived IFN-α DC to induce Mtb antigen-specific T cell response in patients with active TB, subjects with LTBI and healthy donors (HD). The percentage of BDCA3+ mDC2 and CD123+ pDC declined significantly in active TB patients with respect HD whereas the same subsets displayed a remarkable activation in LTBI. Simultaneously, IFN-α-driven differentiation of DC resulted profoundly impaired from monocytes of active TB patients as compared to LTBI and HD individuals. Importantly, the specific altered developmental trait of IFN-α DC from active TB patients was associated with a marked change of molecular signalings conveying antigen presentation as well as full inability to induce antigen-specific T cell response. Thus, these data unravel an unavoidable role of IFN-α in determining the induction of Mtb-specific protective immunity which is essential to control Mtb infection.

2017-12-18 | GSE84344 | GEO

Spontaneous Latency in a Rabbit Model of Pulmonary Tuberculosis

Project description:Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), is an exquisitely adapted human pathogen capable of surviving for decades in the lungs of immune competent individuals in absence of disease. The World Health Organization estimates that 2 billion people have latent TB infection (LTBI), defined by positive immunologic response to Mtb antigens with no clinical signs of disease. A better understanding of host and pathogen determinants of LTBI and subsequent reactivation would benefit TB control efforts. Animal models of LTBI have been hampered mainly by an inability to achieve complete bacillary clearance. We have characterized a rabbit model of LTBI in which, similar to most humans, complete clearance of pulmonary Mtb infection and pathology occurs spontaneously. The evidence that Mtb-CDC1551-infected rabbits achieve LTBI, rather than sterilization, is based on the ability of the bacilli to be reactivated following immune suppression. The microarray experiments involves comparison of: 1) Changes in rabbit gene expression between Mtb-CDC1551 infected and uninfected animals at 2,4,8 and 12 weeks post infection. New Zealand White rabbits were infected with Mtb CDC1551 at 3.5log10 (on day 0). Lung tissue from Mtb-infected rabbits were isolated from uninfected (control) and at 2, 4, 8 and 16 weeks post infection and used for total RNA extraction. Total rabbit lung RNA was used for microarray analysis to determine infection induced changes in host gene expression.

2012-07-10 | E-GEOD-39219 | biostudies-arrayexpress

HLADR expression marks recently divided memory CD4 T cells in latent tuberculosis infected subjects upon in vitro stimulation with Mycobacterium tuberculosis antigens

Project description:HLADR expression marks recently divided memory CD4 T cells in latent tuberculosis infected subjects upon in vitro stimulation with Mycobacterium tuberculosis antigens

| PRJNA682752 | ENA

Mtb-induced BAL cell gene expression signature in LTBI [naive experiment]

Project description:In this study, we evaluated global Mtb-induced gene expression in airway immune cells obtained by bronchoalveolar lavage of individuals with latent tuberculosis infection (LTBI) and in Mtb-naïve control subjects We used microarrays to detail the global programme of gene expression evaluating the impact of localized T cells subsets in the recall responses of individuals with LTBI

2019-08-09 | GSE134565 | GEO

Mtb-induced BAL cell gene expression signature in LTBI [CD4 experiment]

2019-08-09 | GSE134564 | GEO

Mtb-induced BAL cell gene expression signature in LTBI [CD8 experiment]

2019-08-09 | GSE134550 | GEO