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2014 ; 20
(16
): 2631-65
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Molecular mechanisms of action and therapeutic uses of pharmacological inhibitors
of HIF-prolyl 4-hydroxylases for treatment of ischemic diseases
#MMPMID23992027
Selvaraju V
; Parinandi NL
; Adluri RS
; Goldman JW
; Hussain N
; Sanchez JA
; Maulik N
Antioxid Redox Signal
2014[Jun]; 20
(16
): 2631-65
PMID23992027
show ga
SIGNIFICANCE: In this review, we have discussed the efficacy and effect of small
molecules that act as prolyl hydroxylase domain inhibitors (PHDIs). The use of
these compounds causes upregulation of the pro-angiogenic factors and hypoxia
inducible factor-1? and -2? (HIF-1? and HIF-2?) to enhance angiogenic,
glycolytic, erythropoietic, and anti-apoptotic pathways in the treatment of
various ischemic diseases responsible for significant morbidity and mortality in
humans. RECENT ADVANCES: Sprouting of new blood vessels from the existing
vasculature and surgical intervention, such as coronary bypass and stent
insertion, have been shown to be effective in attenuating ischemia. However, the
initial reentry of oxygen leads to the formation of reactive oxygen species that
cause oxidative stress and result in ischemia/reperfusion (IR) injury. This
apparent "oxygen paradox" must be resolved to combat IR injury. During hypoxia,
decreased activity of PHDs initiates the accumulation and activation of HIF-1?,
wherein the modulation of both PHD and HIF-1? appears as promising therapeutic
targets for the pharmacological treatment of ischemic diseases. CRITICAL ISSUES:
Research on PHDs and HIFs has shown that these molecules can serve as therapeutic
targets for ischemic diseases by modulating glycolysis, erythropoiesis,
apoptosis, and angiogenesis. Efforts are underway to identify and synthesize
safer small-molecule inhibitors of PHDs that can be administered in vivo as
therapy against ischemic diseases. FUTURE DIRECTIONS: This review presents a
comprehensive and current account of the existing small-molecule PHDIs and their
use in the treatment of ischemic diseases with a focus on the molecular
mechanisms of therapeutic action in animal models.