Results 61 to 70 of about 1,114,410 (399)

Dual role of the L-arginine–ADMA–NO pathway in systemic hypoxic vasodilation and pulmonary hypoxic vasoconstriction

open access: yesPulmonary Circulation, 2020
In healthy vascular endothelium, nitric oxide acts as a vasodilator paracrine mediator on adjacent smooth muscle cells. By activating soluble guanylyl cyclase, nitric oxide stimulates cyclic guanosine monophosphate (cGMP) which causes relaxation of ...
Rainer Böger, Juliane Hannemann
doaj   +1 more source

Limb Remote Ischemic Conditioning Promotes Neurogenesis after Cerebral Ischemia by Modulating miR-449b/Notch1 Pathway in Mice

open access: yesBiomolecules, 2022
Neurogenesis plays an important role in the prognosis of stroke patients and is known to be promoted by the activation of the Notch1 signaling pathway. Studies on the airway epithelium have shown that miR-449b represses the Notch pathway. The study aimed
Sijie Li   +11 more
doaj   +1 more source

Generation of a human embryonic stem cell (WAe001-A-47) with hVGLL4 doxycyclin-inducible expression by the PiggyBac transposon system

open access: yesStem Cell Research, 2021
VGLL4 is a new component of the Hippo pathway and bind TEADs to compete with YAP, so as to inhibit tumor progression, but its role in stem cell and organ regeneration remains unclear. Using the PiggyBac transposon system, we generated a VGLL4 doxycycline-
Yingyi Quan   +11 more
doaj  

Hypoxia and aging [PDF]

open access: yesExperimental & Molecular Medicine, 2019
Eukaryotic cells require sufficient oxygen (O2) for biological activity and survival. When the oxygen demand exceeds its supply, the oxygen levels in local tissues or the whole body decrease (termed hypoxia), leading to a metabolic crisis, threatening physiological functions and viability.
openaire   +3 more sources

Experimental Models of Sarcopenia: Bridging Molecular Mechanism and Therapeutic Strategy

open access: yesCells, 2020
Sarcopenia has been defined as a progressive decline of skeletal muscle mass, strength, and functions in elderly people. It is accompanied by physical frailty, functional disability, falls, hospitalization, and mortality, and is becoming a major ...
Sakulrat Mankhong   +5 more
doaj   +1 more source

Controls of Nuclear Factor-Kappa B Signaling Activity by 5’-AMP-Activated Protein Kinase Activation With Examples in Human Bladder Cancer Cells [PDF]

open access: yesInternational Neurourology Journal, 2016
Generally, both lipopolysaccharide (LPS)- and hypoxia-induced nuclear factor kappa B (NF-κB) effects are alleviated through differential posttranslational modification of NF-κB phosphorylation after pretreatment with 5´-AMP-activated protein kinase (AMPK)
Bo-Hwa Choi   +4 more
doaj   +1 more source

Weight Loss and Fat Metabolism during Multi-Day High-Altitude Sojourns: A Hypothesis Based on Adipocyte Signaling

open access: yesLife, 2022
Several publications and random observations have reported weight loss in high-altitude sojourners of both sexes. This could be a result of multiple adaptations, which hypoxia and mountaineering provoke on a cellular and organic level.
Stephan Pramsohler   +3 more
doaj   +1 more source

The role of hypoxia in cancer progression, angiogenesis, metastasis, and resistance to therapy

open access: yesHypoxia, 2015
Hypoxia is a non-physiological level of oxygen tension, a phenomenon common in a majority of malignant tumors. Tumor-hypoxia leads to advanced but dysfunctional vascularization and acquisition of epithelial-to-mesenchymal transition phenotype resulting ...
B. Muz   +3 more
semanticscholar   +1 more source

Hypoxia and Inflammation: Insights From High-Altitude Physiology

open access: yesFrontiers in Physiology, 2021
The key regulators of the transcriptional response to hypoxia and inflammation (hypoxia inducible factor, HIF, and nuclear factor-kappa B, NF-κB, respectively) are evolutionarily conserved and share significant crosstalk. Tissues often experience hypoxia
K. Pham, K. Parikh, Erica C Heinrich
semanticscholar   +1 more source

Hypoxia Signaling Pathway in Stem Cell Regulation: Good and Evil [PDF]

open access: yes, 2018
Purpose of Review: This review summarizes the role of hypoxia and hypoxia-inducible factors (HIFs) in the regulation of stem cell biology, specifically focusing on maintenance, differentiation, and stress responses in the context of several stem cell ...
Aljoufi, Arafat   +3 more
core   +1 more source

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