scholarly journals P068 Hyperbaric oxygen reduces hypoxia-inducible factor-1 alpha expression in experimental acute distal colitis

2014 ◽  
Vol 8 ◽  
pp. S91
Author(s):  
R.S. Parra ◽  
E. Uchoa Carreira ◽  
A.H.P. Lopes ◽  
T.M. Cunha ◽  
S.B. Garcia ◽  
...  
Keyword(s):  
Hyperbaric Oxygen ◽  
Hypoxia Inducible Factor ◽  
Hypoxia Inducible Factor 1

scholarly journals Hyperbaric Oxygen (HBO) Reduce Expression of Hypoxia Inducible Factor-1 Alpha (HIF-1 alpha) and Endometriotic Tissue Size in Mice Model of Endometriosis

2020 ◽  
Vol 151 ◽  
pp. 01003
Author(s):  
Dedy Syahrizal ◽  
Cut Mustika ◽  
Teuku Renaldi ◽  
Mohammad G. Suryokusumo ◽  
Hendy Hendarto
Keyword(s):  
Hyperbaric Oxygen ◽  
Hypoxia Inducible Factor ◽  
Control Group ◽  
Mice Model ◽  
Control Group Design ◽  
Hypoxia Inducible Factor 1 ◽  
Peritoneal Tissue ◽  
Implant Size ◽  
Experimental Laboratory ◽  
Tissue Size

Hypoxia in endometriosis will increase the expression of Hypoxia Inducible Factor-1alpha (HIF1alpha) and its expression could be decreased by Hyperbaric Oxygen (HBO). This study aimed to analyze the effect of HBO 2.4 ATA for 3x30 minutes per day for 10 days on the expression of HIF-1 alpha and endometriotic tissue size on mice model of endometriosis. This study was an experimental laboratory study with a separate pretest-posttest control group design. The mice were divided into three groups, the first was a pretest control group (which describes the condition after endometrium transplantation), the second was the endometriotic group that received hyperbaric oxygen, and the third was the endometriotic group that did not receive hyperbaric oxygen therapy. The endometriosis implant size in the peritoneal tissue was assessed and the immunohistochemistry examination was conducted to determine the expression of HIF-1 alpha. The endometriosis tissue size was reduced in the HBO group compared to the control and nonHBO group. The lowest expression of HIF-1 alpha was significantly found in HBO over the other group. The decrease of HIF1 alpha expression mediates the reduction of size endometriotic tissue due to the therapy of HBO.

Hyperbaric oxygen therapy activates hypoxia-inducible factor 1 (HIF-1), which contributes to improved wound healing in diabetic mice

2015 ◽  
Vol 23 (1) ◽  
pp. 98-103 ◽  
Author(s):  
Vivekananda Gupta Sunkari ◽  
Folke Lind ◽  
Ileana Ruxandra Botusan ◽  
Abad Kashif ◽  
Zhao-Jun Liu ◽  
...  
Keyword(s):  
Wound Healing ◽  
Hyperbaric Oxygen ◽  
Hyperbaric Oxygen Therapy ◽  
Oxygen Therapy ◽  
Hypoxia Inducible Factor ◽  
Diabetic Mice ◽  
Hypoxia Inducible Factor 1

Vascular adaptations to hypoxia: molecular and cellular mechanisms regulating vascular tone

2007 ◽  
Vol 43 ◽  
pp. 105-120 ◽  
Author(s):  
Michael L. Paffett ◽  
Benjimen R. Walker
Keyword(s):  
Vascular Tone ◽  
Cellular Proliferation ◽  
Hypoxic Pulmonary Vasoconstriction ◽  
Hypoxia Inducible Factor ◽  
Systemic Circulation ◽  
Cellular Mechanisms ◽  
Hypoxia Inducible Factor 1 ◽  
Pulmonary Vasoconstriction ◽  
Adaptive Mechanisms ◽  
Adaptive Processes

Several molecular and cellular adaptive mechanisms to hypoxia exist within the vasculature. Many of these processes involve oxygen sensing which is transduced into mediators of vasoconstriction in the pulmonary circulation and vasodilation in the systemic circulation. A variety of oxygen-responsive pathways, such as HIF (hypoxia-inducible factor)-1 and HOs (haem oxygenases), contribute to the overall adaptive process during hypoxia and are currently an area of intense research. Generation of ROS (reactive oxygen species) may also differentially regulate vascular tone in these circulations. Potential candidates underlying the divergent responses between the systemic and pulmonary circulations may include Nox (NADPH oxidase)-derived ROS and mitochondrial-derived ROS. In addition to alterations in ROS production governing vascular tone in the hypoxic setting, other vascular adaptations are likely to be involved. HPV (hypoxic pulmonary vasoconstriction) and CH (chronic hypoxia)-induced alterations in cellular proliferation, ionic conductances and changes in the contractile apparatus sensitivity to calcium, all occur as adaptive processes within the vasculature.

TAp73 opposes tumor angiogenesis by promoting hypoxia-inducible factor 1α degradation

2020 ◽  
Author(s):  
Lungwani Muungo
Keyword(s):  
Cancer Progression ◽  
Hypoxia Inducible Factor ◽  
Tumor Hypoxia ◽  
Human Lung Cancer ◽  
Regulatory Subunit ◽  
Patients With Cancer ◽  
Hypoxia Inducible Factor 1 ◽  
Chemically Induced ◽  
Induced Tumors ◽  
Patient Prognosis

Tumor hypoxia and hypoxia-inducible factor 1 (HIF-1) activationare associated with cancer progression. Here, we demonstrate thatthe transcription factor TAp73 opposes HIF-1 activity through anontranscriptional mechanism, thus affecting tumor angiogenesis.TAp73-deficient mice have an increased incidence of spontaneousand chemically induced tumors that also display enhanced vascularization.Mechanistically, TAp73 interacts with the regulatory subunit(α) of HIF-1 and recruits mouse double minute 2 homolog intothe protein complex, thus promoting HIF-1α polyubiquitination andconsequent proteasomal degradation in an oxygen-independentmanner. In human lung cancer datasets, TAp73 strongly predictsgood patient prognosis, and its expression is associated with lowHIF-1 activation and angiogenesis. Our findings, supported by invivo and clinical evidence, demonstrate a mechanism for oxygenindependentHIF-1 regulation, which has important implicationsfor individualizing therapies in patients with cancer.

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