Mitochondrial activity has been shown to be centrally involved in the progression of apoptosis. The electron transport chain is a major player in this process and oxygen uptake analysis provides detailed information on its activity. Here we examined the ability of a fluorescence based oxygen uptake assay to inform on cellular responses to apoptosis induction. HL60 cells treated with camptothecin and UV light were used as a model and the ability of the assay to detect dose and time dependent decreases in respiratory activity analysed. The data obtained were compared to more specific markers of apoptosis including annexin V binding, and caspase-3 activity. Reductions in oxygen uptake rates were seen at lower doses than increases in annexin V binding or mitochondrial membrane potential depolarisation. These reductions were observed earlier than detectable caspase-3 activity and were unaffected by pre-treatment with the caspase-3 inhibitor benzyloxycarbonyl-Val-Ala-Asp-fluoro-methylketone (zVADfmk).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jim.2005.09.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Glutathione-Responsive Metal-Organic-Framework-Derived MnO/(A/R)TiO Nanoparticles for Enhanced Synergistic Sonodynamic/Chemodynamic/Immunotherapy.
ACS Nano
January 2025
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
Despite the potential of sonodynamic therapy (SDT) in treating malignant tumors, the lack of effective sonosensitizers has limited its clinical implementation. In this study, we explored the relationship between the heteroatom doping concentration in metal-organic frameworks and interface formation after pyrolysis by regulating the addition of manganese sources and successfully derived Z-scheme heterojunctions MnO/(A/R)TiO (MTO) in situ from MIL-125-NH (Ti/Mn). The electron transfer pathway introduced by interfacial contact promoted carrier separation and greatly preserved the effective redox components, significantly influencing the performance of reactive oxygen species generation.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
Department of Neurology, Mayo Clinic, Rochester, MN, USA.
Background: While disease-modifying treatments that reduce Aβ have been recently approved by the FDA, the identification of novel therapeutic targets and strategies that target underlying mechanisms to delay the AD development are still needed. Abnormal brain energy homeostasis and mitochondria dysfunction are observed early in AD. Therefore, the development of treatments to restore these defects could be beneficial.
View Article and Find Full Text PDFFOSL1 transcriptionally dictates the Warburg effect and enhances chemoresistance in triple-negative breast cancer.
J Transl Med
January 2025
Department of Breast Surgery, General Surgery Center, The First Hospital of Jilin University, No.71, Xinmin Street, Changchun City, Jilin Province, P.R. China.
Background: Dysregulated energy metabolism has emerged as a defining hallmark of cancer, particularly evident in triple-negative breast cancer (TNBC). Distinct from other breast cancer subtypes, TNBC exhibits heightened glycolysis and aggressiveness. However, the transcriptional mechanisms of aerobic glycolysis in TNBC remains poorly understood.
View Article and Find Full Text PDFHumans have, throughout history, faced periods of starvation necessitating increased physical effort to gather food. To explore adaptations in muscle function, 13 participants (7 males and 6 females) fasted for seven days. They lost 4.
View Article and Find Full Text PDFAdaptive hip exoskeleton control using heart rate feedback reduces oxygen cost during ecological locomotion.
Sci Rep
January 2025
Biorobotics Laboratory, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland.
Despite their potential, exoskeletons have not reached widespread adoption in daily life, partly due to the challenge of seamlessly adapting assistance across various tasks and environments. Task-specific designs, reliance on complex sensing and extensive data-driven training often limit the practicality of the existing control strategies. To address this challenge, we introduce an adaptive control strategy for hip exoskeletons, emphasizing minimal sensing and ease of implementation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!