Heterochronic parabiosis consists of surgically connecting the circulatory systems of a young and an old animal. This technique serves as a model to study circulating factors that accelerate aging in young organisms exposed to old blood or induce rejuvenation in old organisms exposed to young blood. Despite the promising results, the exact cellular and molecular mechanisms remain unclear, so this study aims to explore and elucidate them in more detail.
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http://dx.doi.org/10.1038/s41514-024-00166-0 | DOI Listing |
Ageing Res Rev
December 2024
Department of Bioengineering and QB3 Institute, University of California, Berkeley, Berkeley, CA 94720, USA. Electronic address:
This concise review provides new perspectives on systemic reduction of tissue aging by comparing different strategies, such as heterochronic parabiosis, injections of young blood plasma, neutral blood exchange (NBE) and therapeutic plasma exchange (TPE). Unlike previous literature that primarily discusses the need for young blood factors, we emphasize the potential of diluting age-elevated proteins as the way to re-calibrate systemic proteome to its younger state without donor blood. Furthermore, we introduce modulation of proteome noise, as an important part of understanding tissue aging and as a critical mechanism for tissue rejuvenation.
View Article and Find Full Text PDFFront Med (Lausanne)
October 2024
Institute Advanced Dermatology, A Forefront Dermatology Practice, Lincolnshire, IL, United States.
Regenerative medicine and its offshoot, regenerative aesthetics, have been hot topics over the past 15 years. Studies with heterochronic parabiosis and others pointed to a circulating factor that could rejuvenate aging tissues. Stem cells are known to have regenerative powers, but they are difficult to extract, grow in culture or maintain.
View Article and Find Full Text PDFFront Bioeng Biotechnol
September 2024
Dipartimento di Medicina Interna e Specialità Mediche (DIMI), Università Degli Studi di Genova, Genova, Italy.
Some studies showed a "rejuvenating" effect of exposing aging tissues to a young environment. In mouse heterochronic parabiosis experiments, in response to young organisms, old animals lived longer than isochrony old age-matched conjoint animals. Comparable "rejuvenating" effects were obtained by injecting young plasma in old mice.
View Article and Find Full Text PDFMatrix Biol
December 2024
Department of Environmental & Health Chemistry, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea; HaplnScience Research Institute, HaplnScience, Inc., Seongnam 13494, Republic of Korea. Electronic address:
The skin seems to rejuvenate upon exposure to factors within the circulation of young organisms. Intrinsic factors that modulate skin aging are poorly understood. We used heterochronic parabiosis and aptamer-based proteomics to identify serum-derived rejuvenating factors.
View Article and Find Full Text PDFNPJ Aging
August 2024
Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.
Heterochronic parabiosis consists of surgically connecting the circulatory systems of a young and an old animal. This technique serves as a model to study circulating factors that accelerate aging in young organisms exposed to old blood or induce rejuvenation in old organisms exposed to young blood. Despite the promising results, the exact cellular and molecular mechanisms remain unclear, so this study aims to explore and elucidate them in more detail.
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