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2017 ; 7
(1
): 15998
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T helper cells with specificity for an antigen in cardiomyocytes promote pressure
overload-induced progression from hypertrophy to heart failure
#MMPMID29167489
Gröschel C
; Sasse A
; Röhrborn C
; Monecke S
; Didié M
; Elsner L
; Kruse V
; Bunt G
; Lichtman AH
; Toischer K
; Zimmermann WH
; Hasenfuß G
; Dressel R
Sci Rep
2017[Nov]; 7
(1
): 15998
PMID29167489
show ga
We investigated whether CD4(+)-T cells with specificity for an antigen in
cardiomyocytes promote the progression from hypertrophy to heart failure in mice
with increased pressure load due to transverse aortic constriction (TAC). OT-II
mice expressing a transgenic T cell receptor (TCR) with specificity for ovalbumin
(OVA) on CD4(+)-T cells and cMy-mOVA mice expressing OVA on cardiomyocytes were
crossed. The resulting cMy-mOVA-OT-II mice did not display signs of spontaneous
autoimmunity despite the fact that their OVA-specific CD4(+)-T cells were not
anergic. After TAC, progression to heart failure was significantly accelerated in
cMy-mOVA-OT-II compared to cMy-mOVA mice. No OVA-specific antibodies were induced
in response to TAC in cMy-mOVA-OT-II mice, yet more CD3(+) T cells infiltrated
their myocardium when compared with TAC-operated cMy-mOVA mice. Systemically, the
proportion of activated CD4(+)-T cells with a Th(1) and Th(17) cytokine profile
was increased in cMy-mOVA-OT-II mice after TAC. Thus, T helper cells with
specificity for an antigen in cardiomyocytes can directly promote the progression
of heart failure in response to pressure overload independently of
autoantibodies.