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Oxidation state of bioavailable dissolved organic matter influences bacterioplankton respiration and growth efficiency.
Commun Biol
January 2025
Marine Science Institute/Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, USA.
Oxygen consumption by oceanic microbes can predict respiration (CO production) but requires an assumed respiratory quotient (RQ; ΔO/ΔCO). Measured apparent RQs (ARQs) can be impacted by various processes, including nitrification and changes in dissolved organic matter (DOM) composition, leading to discrepancies between ARQ and actual RQ. In DOM remineralization experiments conducted in the eastern North Atlantic Ocean, ARQs averaged 1.
View Article and Find Full Text PDFFSH exacerbates bone loss by promoting osteoclast energy metabolism through the CREB-MDH2-NAD axis.
Metabolism
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State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, PR China. Electronic address:
Aims: Osteoclast energy metabolism is a promising target for treating diseases characterized by high osteoclast activity, such as osteoporosis. However, the regulatory factors involved in osteoclast bioenergetic processes are still in the early stages of being fully understood. This study reveals the effects of follicle-stimulating hormone (FSH) on osteoclast energy metabolism.
View Article and Find Full Text PDFCadmium-cardiolipin disruption of respirasome assembly and redox balance through mitochondrial membrane rigidification.
J Lipid Res
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Physiology and Pathophysiology of Cells and Membranes, Medical School OWL, Bielefeld University, Bielefeld, Germany. Electronic address:
The environmental pollutant cadmium (Cd) poses a threat to human health through consumption of contaminated foodstuffs culminating in chronic nephrotoxicity. Mitochondrial dysfunction and excessive reactive oxygen species (ROS) are key to Cd cellular toxicity. Cd-lipid interactions have been less considered.
View Article and Find Full Text PDFMolecular Imaging for Biomimetic Nanomedicine in Cancer Therapy: Current Insights and Challenges.
ACS Appl Mater Interfaces
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Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
Coating biological membranes onto biomimetic nanocarriers improves biocompatibility, prolongs circulation, and enhances targeted delivery for cancer precision medicine. To better understand the biodistribution profiles of these biomimetic nanosystems, molecular imaging techniques, including optical imaging, radionuclide imaging, magnetic resonance imaging, and ultrasound imaging, have been widely employed for in vivo tracking and dynamic imaging. Here in this review, we delve into the profound role of these imaging modalities in visualizing changes in the tumor microenvironment, particularly in monitoring oxygen consumption and immune response dynamics, highlighting their potential to improve cancer therapies.
View Article and Find Full Text PDFTest-retest reliability of cardiopulmonary exercise test-derived metrics in individuals with COPD versus healthy controls.
Clin Physiol Funct Imaging
January 2025
Centre for Physical Activity Research, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Background: Cardiopulmonary exercise testing (CPET) is usually considered the gold standard for assessing maximal oxygen consumption (V̇O), a health and performance marker in patients with chronic obstructive pulmonary disease (COPD). Despite the widespread application of CPET, the absolute and relative test-retest reliability of CPET-derived metrics remains unexamined.
Objective: To examine and compare test-retest reliability of CPET derived metrics in individuals with COPD and healthy matched controls.
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