Trending With Impact: Green Tea Enhances Fitness and Lifespan of C. Elegans

2 views

|

October 21, 2021

Aging-US published this trending priority research paper on October 4, 2021, entitled, “Green tea catechins EGCG and ECG enhance the fitness and lifespan of Caenorhabditis elegans by complex I inhibition” by researchers from the Department of Human Nutrition, Institute of Nutrition, Friedrich Schiller University Jena, Germany; MOE Key Laboratory of Environment Correlative Dietology, College of Food Science and Technology, Huazhong Agricultural University, Wuhan, China; Laboratory of Energy Metabolism, Institute of Translational Medicine, Department of Health Sciences and Technology, Zurich, Schwerzenbach, Switzerland; Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Austria. Abstract Green tea catechins are associated with a delay in aging. We have designed the current study to investigate the impact and to unveil the target of the most abundant green tea catechins, epigallocatechin gallate (EGCG) and epicatechin gallate (ECG). Experiments were performed in Caenorhabditis elegans to analyze cellular metabolism, ROS homeostasis, stress resistance, physical exercise capacity, health- and lifespan, and the underlying signaling pathways. Besides, we examined the impact of EGCG and ECG in isolated murine mitochondria. A concentration of 2.5 μM EGCG and ECG enhanced health- and lifespan as well as stress resistance in C. elegans. Catechins hampered mitochondrial respiration in C. elegans after 6–12 h and the activity of complex I in isolated rodent mitochondria. The impaired mitochondrial respiration was accompanied by a transient drop in ATP production and a temporary increase in ROS levels in C. elegans. After 24 h, mitochondrial respiration and ATP levels got restored, and ROS levels even dropped below control conditions. The lifespan increases induced by EGCG and ECG were dependent on AAK-2/AMPK and SIR-2.1/SIRT1, as well as on PMK-1/p38 MAPK, SKN-1/NRF2, and DAF-16/FOXO. Long-term effects included significantly diminished fat content and enhanced SOD and CAT activities, required for the positive impact of catechins on lifespan. In summary, complex I inhibition by EGCG and ECG induced a transient drop in cellular ATP levels and a temporary ROS burst, resulting in SKN-1 and DAF-16 activation. Through adaptative responses, catechins reduced fat content, enhanced ROS defense, and improved healthspan in the long term. Sign up for free Altmetric alerts about this article - https://oncotarget.altmetric.com/details/email_updates?id=10.18632%2Foncotarget.203597 DOI - https://doi.org/10.18632/aging.203597 Full text - https://www.aging-us.com/article/203597/text Correspondence to: Corina T. Madreiter-Sokolowski email: corina.madreiter@medunigraz.at and Michael Ristow email: michael-ristow@ethz.ch Keywords: aging, reactive oxygen species, mitochondria, polyphenols, C. elegans About Aging-US Launched in 2009, Aging-US publishes papers of general interest and biological significance in all fields of aging research and age-related diseases, including cancer—and now, with a special focus on COVID-19 vulnerability as an age-dependent syndrome. Topics in Aging-US go beyond traditional gerontology, including, but not limited to, cellular and molecular biology, human age-related diseases, pathology in model organisms, signal transduction pathways (e.g., p53, sirtuins, and PI-3K/AKT/mTOR, among others), and approaches to modulating these signaling pathways. Please visit our website at http://www.Aging-US.com​​ or connect with us on: Twitter - https://twitter.com/AgingJrnl Facebook - https://www.facebook.com/AgingUS/ SoundCloud - https://soundcloud.com/aging-us​ YouTube - https://www.youtube.com/agingus​ LinkedIn - https://www.linkedin.com/company/aging​ Aging-US is published by Impact Journals, LLC please visit http://www.ImpactJournals.com​​ or connect with @ImpactJrnls Media Contact 18009220957 MEDIA@IMPACTJOURNALS.COM

Cell ScienceChemistryFood and Beverage

Keep up to date with all your favourite videos and channels.

Get personalised notifications on new releases and channel content by subscribing to the LabTube eNewsletter.