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Original

Microcirculation and oxidative stress

, MD, &
Pages 1364-1375 | Received 19 May 2007, Published online: 07 Jul 2009
 

Abstract

The microcirculation is a complex and integrated system, transporting oxygen and nutrients to the cells. The key component of this system is the endothelium, contributing to the local balance between pro and anti-inflammatory mediators, hemostatic balance, as well as vascular permeability and cell proliferation. A constant shear stress maintains vascular endothelium homeostasis while perturbed shear stress leads to changes in secretion of vasodilator and vasoconstrictor agents. Increased oxidative stress is a major pathogenetic mechanism of endothelial dysfunction by decreasing NO bioavailability, promoting inflammation and participating in activation of intracellular signals cascade, so influencing ion channels activation, signal transduction pathways, cytoskeleton remodelling, intercellular communication and ultimately gene expression. Targeting the microvascular inflammation and oxidative stress is a fascinating approach for novel therapies in order to decrease morbidity and mortality of chronic and acute diseases.

Abbreviations
ACE-I=

angiotensin-converting enzyme inhibitors

ADMA=

asymmetric dimethylarginine

AGEs=

advanced glycation products

AP-1=

Activator protein-1

BH4=

Tetrahydrobiopterin

BMC=

bone-marrow cells

cNOS=

Constitutive NOS

COX=

Cyclooxygenase

CRP=

C-reactive protein

CVD=

Cardiovascular damage

eNOS=

endothelial NOS

ERK=

Extracellular signal-regulated kinase

ET-1=

Endothelin-1

ET-A=

Endothelin-A receptor

HPV=

Hypoxic pulmonary vasoconstriction

JNK=

Jun N-terminal kinase

KATP=

Potassium-Adenosine triphosphate sensitive K+ channels

Kv=

Voltage-dependent potassium channels

ICAM-1=

Intercellular adhesion molecule-1

IL-1=

Interleukin-1

IFN-γ=

interferon-gamma

iNOS=

Inducible NOS

I/R=

Ischemia reperfusion injury

LDL=

Low density lipoprotein

LTB4=

Leukotriene B4

MAPK=

Mitogen-activated protein kinase

MCP-1=

Monocyte chemotactic protein-1

MMPs=

Matrix metalloproteinases

MPO=

Myeloperoxidase

NADPH=

Reduced nicotinamide adenine dinucleotide phosphate

NO=

Nitric oxide

NOS=

Nitric oxide synthase

NF-κB=

Nuclear factor-κB

nNOS=

neuronal NOS

PAF=

Platelet-activating factor

PAI-1=

Plasminogen activator inhibitor-1

PGI2=

Prostacyclin

P13 K=

phosphatidyl-inositol-3-kinase

ROS=

Reactive oxygen species

SOD=

superoxide dismutase

TNF-α=

Tumour necrosis factor alpha

TRP=

Transient receptor potential channels

TXA2=

Thromboxane

VCAM-1=

Vascular cell adhesion molecule-1.

Abbreviations
ACE-I=

angiotensin-converting enzyme inhibitors

ADMA=

asymmetric dimethylarginine

AGEs=

advanced glycation products

AP-1=

Activator protein-1

BH4=

Tetrahydrobiopterin

BMC=

bone-marrow cells

cNOS=

Constitutive NOS

COX=

Cyclooxygenase

CRP=

C-reactive protein

CVD=

Cardiovascular damage

eNOS=

endothelial NOS

ERK=

Extracellular signal-regulated kinase

ET-1=

Endothelin-1

ET-A=

Endothelin-A receptor

HPV=

Hypoxic pulmonary vasoconstriction

JNK=

Jun N-terminal kinase

KATP=

Potassium-Adenosine triphosphate sensitive K+ channels

Kv=

Voltage-dependent potassium channels

ICAM-1=

Intercellular adhesion molecule-1

IL-1=

Interleukin-1

IFN-γ=

interferon-gamma

iNOS=

Inducible NOS

I/R=

Ischemia reperfusion injury

LDL=

Low density lipoprotein

LTB4=

Leukotriene B4

MAPK=

Mitogen-activated protein kinase

MCP-1=

Monocyte chemotactic protein-1

MMPs=

Matrix metalloproteinases

MPO=

Myeloperoxidase

NADPH=

Reduced nicotinamide adenine dinucleotide phosphate

NO=

Nitric oxide

NOS=

Nitric oxide synthase

NF-κB=

Nuclear factor-κB

nNOS=

neuronal NOS

PAF=

Platelet-activating factor

PAI-1=

Plasminogen activator inhibitor-1

PGI2=

Prostacyclin

P13 K=

phosphatidyl-inositol-3-kinase

ROS=

Reactive oxygen species

SOD=

superoxide dismutase

TNF-α=

Tumour necrosis factor alpha

TRP=

Transient receptor potential channels

TXA2=

Thromboxane

VCAM-1=

Vascular cell adhesion molecule-1.

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