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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2017 ; 12
(11
): e0185973
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Childhood tuberculosis is associated with decreased abundance of T cell gene
transcripts and impaired T cell function
#MMPMID29140996
Hemingway C
; Berk M
; Anderson ST
; Wright VJ
; Hamilton S
; Eleftherohorinou H
; Kaforou M
; Goldgof GM
; Hickman K
; Kampmann B
; Schoeman J
; Eley B
; Beatty D
; Pienaar S
; Nicol MP
; Griffiths MJ
; Waddell SJ
; Newton SM
; Coin LJ
; Relman DA
; Montana G
; Levin M
PLoS One
2017[]; 12
(11
): e0185973
PMID29140996
show ga
The WHO estimates around a million children contract tuberculosis (TB) annually
with over 80 000 deaths from dissemination of infection outside of the lungs. The
insidious onset and association with skin test anergy suggests failure of the
immune system to both recognise and respond to infection. To understand the
immune mechanisms, we studied genome-wide whole blood RNA expression in children
with TB meningitis (TBM). Findings were validated in a second cohort of children
with TBM and pulmonary TB (PTB), and functional T-cell responses studied in a
third cohort of children with TBM, other extrapulmonary TB (EPTB) and PTB. The
predominant RNA transcriptional response in children with TBM was decreased
abundance of multiple genes, with 140/204 (68%) of all differentially regulated
genes showing reduced abundance compared to healthy controls. Findings were
validated in a second cohort with concordance of the direction of differential
expression in both TBM (r2 = 0.78 p = 2x10-16) and PTB patients (r2 = 0.71 p =
2x10-16) when compared to a second group of healthy controls. Although the
direction of expression of these significant genes was similar in the PTB
patients, the magnitude of differential transcript abundance was less in PTB than
in TBM. The majority of genes were involved in activation of leucocytes (p =
2.67E-11) and T-cell receptor signalling (p = 6.56E-07). Less abundant gene
expression in immune cells was associated with a functional defect in T-cell
proliferation that recovered after full TB treatment (p<0.0003). Multiple genes
involved in T-cell activation show decreased abundance in children with acute TB,
who also have impaired functional T-cell responses. Our data suggest that
childhood TB is associated with an acquired immune defect, potentially resulting
in failure to contain the pathogen. Elucidation of the mechanism causing the
immune paresis may identify new treatment and prevention strategies.