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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 Arterioscler+Thromb+Vasc+Biol
2016 ; 36
(1
): 134-44
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Hypoxia-Inducible Factor 1? Is a Critical Downstream Mediator for Hypoxia-Induced
Mitogenic Factor (FIZZ1/RELM?)-Induced Pulmonary Hypertension
#MMPMID26586659
Johns RA
; Takimoto E
; Meuchel LW
; Elsaigh E
; Zhang A
; Heller NM
; Semenza GL
; Yamaji-Kegan K
Arterioscler Thromb Vasc Biol
2016[Jan]; 36
(1
): 134-44
PMID26586659
show ga
OBJECTIVE: Pulmonary hypertension (PH) is characterized by progressive elevation
of pulmonary vascular resistance, right ventricular failure, and ultimately
death. We have shown that in rodents, hypoxia-induced mitogenic factor (HIMF;
also known as FIZZ1 or resistin-like molecule-?) causes PH by initiating lung
vascular inflammation. We hypothesized that hypoxia-inducible factor-1 (HIF-1) is
a critical downstream signal mediator of HIMF during PH development. APPROACH AND
RESULTS: In this study, we compared the degree of HIMF-induced pulmonary vascular
remodeling and PH development in wild-type (HIF-1?(+/+)) and HIF-1? heterozygous
null (HIF-1?(+/-)) mice. HIMF-induced PH was significantly diminished in
HIF-1?(+/-) mice and was accompanied by a dysregulated vascular endothelial
growth factor-A-vascular endothelial growth factor receptor 2 pathway. HIF-1? was
critical for bone marrow-derived cell migration and vascular tube formation in
response to HIMF. Furthermore, HIMF and its human homolog, resistin-like
molecule-?, significantly increased interleukin (IL)-6 in macrophages and lung
resident cells through a mechanism dependent on HIF-1? and, at least to some
extent, on nuclear factor ?B. CONCLUSIONS: Our results suggest that HIF-1? is a
critical downstream transcription factor for HIMF-induced pulmonary vascular
remodeling and PH development. Importantly, both HIMF and human resistin-like
molecule-? significantly increased IL-6 in lung resident cells and increased
perivascular accumulation of IL-6-expressing macrophages in the lungs of mice.
These data suggest that HIMF can induce HIF-1, vascular endothelial growth
factor-A, and interleukin-6, which are critical mediators of both hypoxic
inflammation and PH pathophysiology.
|*Intercellular Signaling Peptides and Proteins/metabolism
[MESH]
|*Vascular Remodeling
[MESH]
|Animals
[MESH]
|Apoptosis
[MESH]
|Bone Marrow Transplantation
[MESH]
|Cell Movement
[MESH]
|Cells, Cultured
[MESH]
|Disease Models, Animal
[MESH]
|Epithelial Cells/metabolism/pathology
[MESH]
|Female
[MESH]
|Fibroblasts/metabolism
[MESH]
|Genotype
[MESH]
|Hemodynamics
[MESH]
|Humans
[MESH]
|Hypertension, Pulmonary/chemically
induced/genetics/*metabolism/physiopathology/prevention & control
[MESH]