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2015 ; 35
(20
): 3528-46
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Immunosuppression-Independent Role of Regulatory T Cells against
Hypertension-Driven Renal Dysfunctions
#MMPMID26240279
Fabbiano S
; Menacho-Márquez M
; Robles-Valero J
; Pericacho M
; Matesanz-Marín A
; García-Macías C
; Sevilla MA
; Montero MJ
; Alarcón B
; López-Novoa JM
; Martín P
; Bustelo XR
Mol Cell Biol
2015[Oct]; 35
(20
): 3528-46
PMID26240279
show ga
Hypertension-associated cardiorenal diseases represent one of the heaviest
burdens for current health systems. In addition to hemodynamic damage, recent
results have revealed that hematopoietic cells contribute to the development of
these diseases by generating proinflammatory and profibrotic environments in the
heart and kidney. However, the cell subtypes involved remain poorly
characterized. Here we report that CD39(+) regulatory T (TREG) cells utilize an
immunosuppression-independent mechanism to counteract renal and possibly cardiac
damage during angiotensin II (AngII)-dependent hypertension. This mechanism
relies on the direct apoptosis of tissue-resident neutrophils by the ecto-ATP
diphosphohydrolase activity of CD39. In agreement with this, experimental and
genetic alterations in TREG/TH cell ratios have a direct impact on
tissue-resident neutrophil numbers, cardiomyocyte hypertrophy, cardiorenal
fibrosis, and, to a lesser extent, arterial pressure elevation during
AngII-driven hypertension. These results indicate that TREG cells constitute a
first protective barrier against hypertension-driven tissue fibrosis and, in
addition, suggest new therapeutic avenues to prevent hypertension-linked
cardiorenal diseases.