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Cellular Oxygen Homeostasis—3rd Edition

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Biology".

Deadline for manuscript submissions: 20 March 2025 | Viewed by 1280

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Guest Editor
Department of Anesthesia and General Intensive Care, Clinical Department of Anesthesia, Medizinische Universität Wien, Vienna, Austria
Interests: cell biology of the lung and heart; organ protection; signaling transduction in the lung; experimental anesthesiology
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Special Issue Information

Dear Colleagues,

Oxygen facilitates the effective production of the cellular energy currency ATP. Cells sense and respond to the partial pressure of oxygen in their environment using a cell-type-specific toolkit of oxygen-sensitive ion channels, receptors, second messengers, transcription factors, and other enzymes. Cellular oxygen homeostasis is a prerequisite for proper cellular function and survival, and both an under-supply and excess of oxygen induce oxidative stress. Dysregulation induces the increased formation of reactive oxygen species, which override the redox buffering capability and modify lipids and proteins. The changes in enzymatic activity can affect all aspects of cellular function, including metabolism, development, differentiation, cellular secretions, epigenetic mechanisms, and gene expression. A good insight into these molecular mechanisms is a prerequisite to understand processes such as aging and diseases such as stroke, ischemia, malignant transformations, and metastasis to finally develop new pharmacological treatments. We invite interested investigators in this field to contribute original articles or reviews to this Special Issue with a focus on molecular mechanisms of cellular responses to different oxygen conditions, whether it be with the help of in vitro models, animal models, or in humans, which might provide insight into clinically relevant questions.

Dr. Verena Tretter
Guest Editor

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Keywords

  • cellular oxygen homeostasis
  • redox signaling
  • cellular oxygen sensing
  • hypoxia
  • hyperoxia

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Published Papers (1 paper)

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Research

25 pages, 3243 KiB  
Article
Candidate Signature miRNAs from Secreted miRNAome of Human Lung Microvascular Endothelial Cells in Response to Different Oxygen Conditions: A Pilot Study
by Wolfgang Schaubmayr, Matthias Hackl, Marianne Pultar, Bahil D. Ghanim, Klaus U. Klein, Johannes A. Schmid, Thomas Mohr and Verena Tretter
Int. J. Mol. Sci. 2024, 25(16), 8798; https://doi.org/10.3390/ijms25168798 - 13 Aug 2024
Viewed by 978
Abstract
Oxygen conditions in the lung determine downstream organ functionality by setting the partial pressure of oxygen, regulating the redox homeostasis and by activating mediators in the lung that can be propagated in the blood stream. Examples for such mediators are secreted soluble or [...] Read more.
Oxygen conditions in the lung determine downstream organ functionality by setting the partial pressure of oxygen, regulating the redox homeostasis and by activating mediators in the lung that can be propagated in the blood stream. Examples for such mediators are secreted soluble or vesicle-bound molecules (proteins and nucleic acids) that can be taken up by remote target cells impacting their metabolism and signaling pathways. MicroRNAs (miRNAs) have gained significant interest as intercellular communicators, biomarkers and therapeutic targets in this context. Due to their high stability in the blood stream, they have also been attributed a role as “memory molecules” that are able to modulate gene expression upon repeated (stress) exposures. In this study, we aimed to identify and quantify released miRNAs from lung microvascular endothelial cells in response to different oxygen conditions. We combined next-generation sequencing (NGS) of secreted miRNAs and cellular mRNA sequencing with bioinformatic analyses in order to delineate molecular events on the cellular and extracellular level and their putative interdependence. We show that the identified miRNA networks have the potential to co-mediate some of the molecular events, that have been observed in the context of hypoxia, hyperoxia, intermittent hypoxia and intermittent hypoxia/hyperoxia. Full article
(This article belongs to the Special Issue Cellular Oxygen Homeostasis—3rd Edition)
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