01 November 2010
Taxol, a microtubule stabilizer, prevents atrial fibrillation in in vitro atrial fibrillation models using rabbit hearts
Junjie XiaoABCD, Hong ZhangBCE, Dandan LiangBDF, Ying LiuCF, Yi LiuDF, Hong ZhaoCF, Jun LiCEF, Luying PengAEF, Yi-Han ChenAEFGMed Sci Monit 2010; 16(11): BR353-360 :: ID: 881213
Abstract
Background: Increased atrial oxidative stress plays an important role in the pathogenesis of atrial fibrillation. A predisposition for atrial fibrillation can be produced by altering the activities of enzymes related to reactive oxygen species metabolism. Microtubule integrity is necessary for cardio-protection; microtubules are involved in many cellular processes, including enzymatic activity. Taxol, a common microtubule stabilizer, can protect cardiac myocytes from oxidative stress. However, its effects on atrial fibrillation remain unknown.
Material/Methods: In vitro rabbit heart models of ischemia-, stretch-, and cholinergic agitation–induced atrial fibrillation were developed. Using either a fluorometric or spectrophotometric assay, we measured reactive oxygen species and the activities of oxidative enzymes including nicotinamide adenine dinucleotide phosphate (NADPH) oxidase, xanthine oxidase, mitochondrial electron transport chain complexes I, mitochondrial electron transport chain complexes III, and superoxide dismutase.
Results: Taxol effectively reduced the incidence of ischemia-, stretch- and cholinergic agitation-induced atrial fibrillation in in vitro rabbit heart models by 50%, 60%, and 40%. Moreover, Taxol decreased the level of reactive oxygen species by 46%, 49%, and 70% in ischemia-, stretch- and cholinergic agitation–induced atrial fibrillation models. Additionally, the activities of NADPH oxidase and xanthine oxidase were increased, whereas those of mitochondrial electron transport chain complexes I and III and superoxide dismutase were not affected.
Conclusions: Taxol, a microtubule stabilizer, prevents atrial fibrillation in in vitro atrial fibrillation model using rabbit hearts. This stabilizer most likely prevents atrial fibrillation by reducing the level of reactive oxygen species.
Keywords: Reactive Oxygen Species - metabolism, Random Allocation, Paclitaxel - pharmacology, NADPH Oxidase - metabolism, Myocytes, Cardiac - metabolism, Models, Animal, Microtubules - metabolism, Heart Atria - physiopathology, Electron Transport Complex III - metabolism, Electron Transport Complex I - metabolism, Cholinergic Agents - pharmacology, Cardiotonic Agents - pharmacology, Atrial Fibrillation - prevention & control, Stress, Mechanical, Superoxide Dismutase - metabolism, Tubulin Modulators - pharmacology, Xanthine Oxidase - metabolism
Editorial
01 April 2024 : Editorial
Editorial: Forty Years of Waiting for Prevention and Cure of HIV Infection – Ongoing Challenges and Hopes for Vaccine Development and Overcoming Antiretroviral Drug ResistanceDOI: 10.12659/MSM.944600
Med Sci Monit 2024; 30:e944600
In Press
05 Mar 2024 : Clinical Research
Role of Critical Shoulder Angle in Degenerative Type Rotator Cuff Tears: A Turkish Cohort StudyMed Sci Monit In Press; DOI: 10.12659/MSM.943703
06 Mar 2024 : Clinical Research
Comparison of Outcomes between Single-Level and Double-Level Corpectomy in Thoracolumbar Reconstruction: A ...Med Sci Monit In Press; DOI: 10.12659/MSM.943797
21 Mar 2024 : Meta-Analysis
Economic Evaluation of COVID-19 Screening Tests and Surveillance Strategies in Low-Income, Middle-Income, a...Med Sci Monit In Press; DOI: 10.12659/MSM.943863
10 Apr 2024 : Clinical Research
Predicting Acute Cardiovascular Complications in COVID-19: Insights from a Specialized Cardiac Referral Dep...Med Sci Monit In Press; DOI: 10.12659/MSM.942612
Most Viewed Current Articles
17 Jan 2024 : Review article
Vaccination Guidelines for Pregnant Women: Addressing COVID-19 and the Omicron VariantDOI :10.12659/MSM.942799
Med Sci Monit 2024; 30:e942799
14 Dec 2022 : Clinical Research
Prevalence and Variability of Allergen-Specific Immunoglobulin E in Patients with Elevated Tryptase LevelsDOI :10.12659/MSM.937990
Med Sci Monit 2022; 28:e937990
16 May 2023 : Clinical Research
Electrophysiological Testing for an Auditory Processing Disorder and Reading Performance in 54 School Stude...DOI :10.12659/MSM.940387
Med Sci Monit 2023; 29:e940387
01 Jan 2022 : Editorial
Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...DOI :10.12659/MSM.935952
Med Sci Monit 2022; 28:e935952