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2015 ; 7
(6
): 695-713
Nephropedia Template TP
gab.com Text
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Genetic and hypoxic alterations of the microRNA-210-ISCU1/2 axis promote
iron-sulfur deficiency and pulmonary hypertension
#MMPMID25825391
White K
; Lu Y
; Annis S
; Hale AE
; Chau BN
; Dahlman JE
; Hemann C
; Opotowsky AR
; Vargas SO
; Rosas I
; Perrella MA
; Osorio JC
; Haley KJ
; Graham BB
; Kumar R
; Saggar R
; Saggar R
; Wallace WD
; Ross DJ
; Khan OF
; Bader A
; Gochuico BR
; Matar M
; Polach K
; Johannessen NM
; Prosser HM
; Anderson DG
; Langer R
; Zweier JL
; Bindoff LA
; Systrom D
; Waxman AB
; Jin RC
; Chan SY
EMBO Mol Med
2015[Jun]; 7
(6
): 695-713
PMID25825391
show ga
Iron-sulfur (Fe-S) clusters are essential for mitochondrial metabolism, but their
regulation in pulmonary hypertension (PH) remains enigmatic. We demonstrate that
alterations of the miR-210-ISCU1/2 axis cause Fe-S deficiencies in vivo and
promote PH. In pulmonary vascular cells and particularly endothelium, hypoxic
induction of miR-210 and repression of the miR-210 targets ISCU1/2 down-regulated
Fe-S levels. In mouse and human vascular and endothelial tissue affected by PH,
miR-210 was elevated accompanied by decreased ISCU1/2 and Fe-S integrity. In
mice, miR-210 repressed ISCU1/2 and promoted PH. Mice deficient in miR-210, via
genetic/pharmacologic means or via an endothelial-specific manner, displayed
increased ISCU1/2 and were resistant to Fe-S-dependent pathophenotypes and PH.
Similar to hypoxia or miR-210 overexpression, ISCU1/2 knockdown also promoted PH.
Finally, cardiopulmonary exercise testing of a woman with homozygous ISCU
mutations revealed exercise-induced pulmonary vascular dysfunction. Thus, driven
by acquired (hypoxia) or genetic causes, the miR-210-ISCU1/2 regulatory axis is a
pathogenic lynchpin causing Fe-S deficiency and PH. These findings carry broad
translational implications for defining the metabolic origins of PH and
potentially other metabolic diseases sharing similar underpinnings.