scholarly journals Hypoxia-Inducible Factor 1 Regulation through Cross Talk between mTOR and MT1-MMP

2013 ◽  
Vol 34 (1) ◽  
pp. 30-42 ◽  
Author(s):  
T. Sakamoto ◽  
J. S. Weng ◽  
T. Hara ◽  
S. Yoshino ◽  
H. Kozuka-Hata ◽  
...  
Keyword(s):  
Cross Talk ◽  
Hypoxia Inducible Factor ◽  
Hypoxia Inducible Factor 1

scholarly journals Cross Talk between Proliferative, Angiogenic, and Cellular Mechanisms Orchestred by HIF-1αin Psoriasis

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Azael Torales-Cardeña ◽  
Isaí Martínez-Torres ◽  
Sandra Rodríguez-Martínez ◽  
Fernando Gómez-Chávez ◽  
Juan C. Cancino-Díaz ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Cross Talk ◽  
Hypoxia Inducible Factor ◽  
Inflammatory Skin Disease ◽  
Cellular Mechanisms ◽  
Hypoxia Inducible Factor 1 ◽  
Biological Phenomena ◽  
Altered Regulation ◽  
Immunological System

Psoriasis is a chronic inflammatory skin disease where the altered regulation in angiogenesis, inflammation, and proliferation of keratinocytes are the possible causes of the disease, and the transcription factor “hypoxia-inducible factor 1-alpha” (HIF-1α) is involved in the homeostasis of these three biological phenomena. In this review, the role of HIF-1αin the cross talk between the cytokines and cells of the immunological system involved in the pathogenesis of psoriasis is discussed.

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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