Aging-US

With an ever-increasing global population grappling with age-related ocular ailments like cataracts, dry eyes, glaucoma, and macular degeneration, the need for new research in this domain is more pressing than ever.

In a new study, researchers Kohsaku Numa, Sandip Kumar Patel, Zhixin A. Zhang, Jordan B. Burton, Akifumi Matsumoto, Jun-Wei B. Hughes, Chie Sotozono, Birgit Schilling, Pierre-Yves Desprez, Judith Campisi (1948-2024), and Koji Kitazawa from the Buck Institute for Research on Aging, Kyoto Prefectural University of Medicine, University of Cambridge, and California Pacific Medical Center shed light on a pivotal aspect of corneal health – the impact of ultraviolet-A (UV-A) radiation on corneal endothelial cells. Their research paper was published on the cover of Aging’s Volume 16, Issue 8, entitled, “Senescent characteristics of human corneal endothelial cells upon ultraviolet-A exposure.”

“The objective of this study was to investigate the senescent phenotypes of human corneal endothelial cells (hCEnCs) upon treatment with ultraviolet (UV)-A.”

Full blog - https://aging-us.org/2024/05/uv-a-exposure-cellular-senescence-and-vision-impairment/

Paper DOI - https://doi.org/10.18632/aging.205761

Corresponding author - Koji Kitazawa - [email protected]

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Keywords - aging, cellular senescence, senescence-associated secretory phenotype, RNA-Seq, proteomics, gene ontology analysis

About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Aging is indexed by PubMed/Medline (abbreviated as “Aging (Albany NY)”), PubMed Central, Web of Science: Science Citation Index Expanded (abbreviated as “Aging‐US” and listed in the Cell Biology and Geriatrics & Gerontology categories), Scopus (abbreviated as “Aging” and listed in the Cell Biology and Aging categories), Biological Abstracts, BIOSIS Previews, EMBASE, META (Chan Zuckerberg Initiative) (2018-2022), and Dimensions (Digital Science).

Please visit our website at https://www.Aging-US.com​​ and connect with us:

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BUFFALO, NY- May 1, 2024 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 16, Issue 8, entitled, “A novel deep proteomic approach in human skeletal muscle unveils distinct molecular signatures affected by aging and resistance training.”

The skeletal muscle proteome alterations to aging and resistance training have been reported in prior studies. However, conventional proteomics in skeletal muscle typically yields wide protein abundance ranges that mask the detection of lowly expressed proteins.

In this new study, researchers Michael D. Roberts, Bradley A. Ruple, Joshua S. Godwin, Mason C. McIntosh, Shao-Yung Chen, Nicholas J. Kontos, Anthony Agyin-Birikorang, Max Michel, Daniel L. Plotkin, Madison L. Mattingly, Brooks Mobley, Tim N. Ziegenfuss, Andrew D. Fruge, and Andreas N. Kavazis from Auburn University, Seer, Inc., and The Center for Applied Health Sciences adopted a novel deep proteomics approach whereby myofibril (MyoF) and non-MyoF fractions were separately subjected to protein corona nanoparticle complex formation prior to digestion and Liquid Chromatography Mass Spectrometry (LC-MS).

“Specifically, we investigated MyoF and non-MyoF proteomic profiles of the vastus lateralis muscle of younger (Y, 22±2 years old; n=5) and middle-aged participants (MA, 56±8 years old; n=6). Additionally, MA muscle was analyzed following eight weeks of resistance training (RT, 2d/week).”

Across all participants, the number of non-MyoF proteins detected averaged to be 5,645±266 (range: 4,888–5,987) and the number of MyoF proteins detected averaged to be 2,611±326 (range: 1,944–3,101). Differences in the non-MyoF (8.4%) and MyoF (2.5%) proteomes were evident between age cohorts, and most differentially expressed non-MyoF proteins (447/543) were more enriched in MA versus Y. Biological processes in the non-MyoF fraction were predicted to be operative in MA versus Y including increased cellular stress, mRNA splicing, translation elongation, and ubiquitin-mediated proteolysis. RT in MA participants only altered ~0.3% of MyoF and ~1.0% of non-MyoF proteomes.

“In summary, aging and RT predominantly affect non-contractile proteins in skeletal muscle. Additionally, marginal proteome adaptations with RT suggest more rigorous training may stimulate more robust effects or that RT, regardless of age, subtly alters basal state skeletal muscle protein abundances.”

DOI - https://doi.org/10.18632/aging.205751

Corresponding author - Michael D. Roberts - [email protected]

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About Aging

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Please visit our website at https://www.Aging-US.com​​ and connect with us:

Facebook - https://www.facebook.com/AgingUS/

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BUFFALO, NY- April 30, 2024 – A new #researchpaper was #published on the #cover of Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 16, Issue 8, entitled, “Senescent characteristics of human corneal endothelial cells upon ultraviolet-A exposure.”

In this new study, researchers Kohsaku Numa, Sandip Kumar Patel, Zhixin A. Zhang, Jordan B. Burton, Akifumi Matsumoto, Jun-Wei B. Hughes, Chie Sotozono, Birgit Schilling, Pierre-Yves Desprez, Judith Campisi (1948-2024), and Koji Kitazawa from Buck Institute for Research on Aging, Kyoto Prefectural University of Medicine, University of Cambridge, and California Pacific Medical Center investigated the senescent phenotypes of human corneal endothelial cells (hCEnCs) upon treatment with ultraviolet (UV)-A.

“We assessed cell morphology, senescence-associated β-galactosidase (SA-β-gal) activity, cell proliferation and expression of senescence markers (p16 and p21) in hCEnCs exposed to UV-A radiation, and senescent hCEnCs induced by ionizing radiation (IR) were used as positive controls.”

The researchers performed RNA sequencing and proteomics analyses to compare gene and protein expression profiles between UV-A- and IR-induced senescent hCEnCs — they also compared the results to non-senescent hCEnCs. Cells exposed to 5 J/cm2 of UV-A or to IR exhibited typical senescent phenotypes, including enlargement, increased SA-β-gal activity, decreased cell proliferation and elevated expression of p16 and p21. RNA-Seq analysis revealed that 83.9% of the genes significantly upregulated and 82.6% of the genes significantly downregulated in UV-A-induced senescent hCEnCs overlapped with the genes regulated in IR-induced senescent hCEnCs. Proteomics also revealed that 93.8% of the proteins significantly upregulated in UV-A-induced senescent hCEnCs overlapped with those induced by IR. In proteomics analyses, senescent hCEnCs induced by UV-A exhibited elevated expression levels of several factors part of the senescence-associated secretory phenotype.

“In this study, where senescence was induced by UV-A, a more physiological stress for hCEnCs compared to IR, we determined that UV-A modulated the expression of many genes and proteins typically altered upon IR treatment, a more conventional method of senescence induction, even though UV-A also modulated specific pathways unrelated to IR.”

DOI - https://doi.org/10.18632/aging.205761

Corresponding author - Koji Kitazawa - [email protected]

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About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Please visit our website at https://www.Aging-US.com​​ and connect with us:

Facebook - https://www.facebook.com/AgingUS/

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BUFFALO, NY- April 24, 2024 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 16, Issue 7, entitled, “Using genetics and proteomics data to identify proteins causally related to COVID-19, healthspan and lifespan: a Mendelian randomization study.”

The COVID-19 pandemic poses a heavy burden on public health and accounts for substantial mortality and morbidity. Proteins are building blocks of life, but specific proteins causally related to COVID-19, healthspan and lifespan, have not been systematically examined. In this new study, researchers Jie V. Zhao, Minhao Yao, and Zhonghua Liu from The University of Hong Kong and Columbia University conducted a Mendelian randomization study to assess the effects of 1,361 plasma proteins on COVID-19, healthspan and lifespan, using large GWAS of severe COVID-19 (up to 13,769 cases and 1,072,442 controls), COVID-19 hospitalization (32,519 cases and 2,062,805 controls) and SARS-COV2 infection (122,616 cases and 2,475,240 controls), healthspan (n = 300,477) and parental lifespan (~0.8 million of European ancestry).

“We included both COVID-19 and healthspan and lifespan in the outcome, because COVID-19 which occurred in recent years reflects a new threat to longevity, whilst healthspan and lifespan reflect overall morbidity and mortality.”

The researchers identified 35, 43, and 63 proteins for severe COVID, COVID-19 hospitalization, and SARS-COV2 infection, and 4, 32, and 19 proteins for healthspan, father’s attained age, and mother’s attained age. In addition to some proteins reported previously, such as SFTPD related to severe COVID-19, the team identified novel proteins involved in inflammation and immunity (such as ICAM-2 and ICAM-5 which affect COVID-19 risk, CXCL9, HLA-DRA and LILRB4 for healthspan and lifespan), apoptosis (such as FGFR2 and ERBB4 which affect COVID-19 risk and FOXO3 which affect lifespan) and metabolism (such as PCSK9 which lowers lifespan). They found 2, 2, and 3 proteins shared between COVID-19 and healthspan/lifespan, such as CXADR and LEFTY2, shared between severe COVID-19 and healthspan/lifespan. Three proteins affecting COVID-19 and seven proteins affecting healthspan/lifespan are targeted by existing drugs.

“Our study provided novel insights into protein targets affecting COVID-19, healthspan and lifespan, with implications for developing new treatment and drug repurposing.”

DOI - https://doi.org/10.18632/aging.205711

Corresponding authors - Jie V. Zhao - [email protected], and Zhonghua Liu - [email protected]

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About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Please visit our website at https://www.Aging-US.com​​ and connect with us:

Facebook - https://www.facebook.com/AgingUS/

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BUFFALO, NY- April 23, 2024 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 16, Issue 7, entitled, “The coupling between healthspan and lifespan in Caenorhabditis depends on complex interactions between compound intervention and genetic background.”

Aging is characterized by declining health that results in decreased cellular resilience and neuromuscular function. The relationship between lifespan and health, and the influence of genetic background on that relationship, has important implications in the development of pharmacological anti-aging interventions.

In this new study, researchers Stephen A. Banse, E. Grace Jackson, Christine A. Sedore, Brian Onken, David Hall, Anna Coleman-Hulbert, Phu Huynh, Theo Garrett, Erik Johnson, Girish Harinath, Delaney Inman, Suzhen Guo, Mackenzie Morshead, Jian Xue, Ron Falkowski, Esteban Chen, Christopher Herrera, Allie J. Kirsch, Viviana I. Perez, Max Guo, Gordon J. Lithgow, Monica Driscoll, and Patrick C. Phillips from the University of Oregon, The State University of New Jersey (Rutgers), The Buck Institute for Research on Aging, and National Institute on Aging assessed swimming performance as well as survival under thermal and oxidative stress across a nematode genetic diversity test panel to evaluate health effects for three compounds previously studied in the Caenorhabditis Intervention Testing Program and thought to promote longevity in different ways – NP1 (nitrophenyl piperazine-containing compound 1), propyl gallate, and resveratrol.

“Overall, we find the relationships among median lifespan, oxidative stress resistance, thermotolerance, and mobility vigor to be complex.”

The researchers showed that oxidative stress resistance and thermotolerance vary with compound intervention, genetic background, and age. The effects of tested compounds on swimming locomotion, in contrast, are largely species-specific. In this study, thermotolerance, but not oxidative stress or swimming ability, correlates with lifespan. Notably, some compounds exert strong impact on some health measures without an equally strong impact on lifespan.

“Our results demonstrate the importance of assessing health and lifespan across genetic backgrounds in the effort to identify reproducible anti-aging interventions, with data underscoring how personalized treatments might be required to optimize health benefits.”

DOI - https://doi.org/10.18632/aging.205743

Corresponding authors - Gordon J. Lithgow - [email protected], Monica Driscoll - [email protected], and Patrick C. Phillips - [email protected]

About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Please visit our website at https://www.Aging-US.com​​ and connect with us:

Facebook - https://www.facebook.com/AgingUS/

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BUFFALO, NY - April 22, 2024 – The Longevity & Aging Series is an enlightening and progressive video interview series presented by Aging, featuring esteemed researchers discussing the latest in aging research, with a focus on their studies published by Aging.

In the premiere episode of the second season of the Longevity & Aging Series, Dr. Irina Conboy and Xiaoyue (Serafina) Mei from the Department of Bioengineering and QB3 at the University of California, Berkeley, discuss a priority research paper they co-authored and published in Aging’s Volume 15, Issue 17, entitled, “Fail-tests of DNA methylation clocks, and development of a noise barometer for measuring epigenetic pressure of aging and disease.”

DOI - https://doi.org/10.18632/aging.205046

Corresponding Author - Irina M. Conboy - [email protected]

Video - https://www.youtube.com/watch?v=aYhUPpEPVv4

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Keywords - aging, DNA methylation, epigenetics, clocks’ fail-test, biological noise

About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Aging is indexed by PubMed/Medline (abbreviated as “Aging (Albany NY)”), PubMed Central, Web of Science: Science Citation Index Expanded (abbreviated as “Aging‐US” and listed in the Cell Biology and Geriatrics & Gerontology categories), Scopus (abbreviated as “Aging” and listed in the Cell Biology and Aging categories), Biological Abstracts, BIOSIS Previews, EMBASE, META (Chan Zuckerberg Initiative) (2018-2022), and Dimensions (Digital Science).

Please visit our website at https://www.Aging-US.com​​ and connect with us:

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In the season 2 premiere episode of the Longevity & Aging Series, Dr. Irina Conboy and Xiaoyue (Serafina) Mei from the Department of Bioengineering and QB3 at the University of California, discuss a research paper they co-authored that was published in Volume 15, Issue 17, of Aging (Aging-US), entitled, “Fail-tests of DNA methylation clocks, and development of a noise barometer for measuring epigenetic pressure of aging and disease.”

DOI - https://doi.org/10.18632/aging.205046

Corresponding Author - Irina M. Conboy - [email protected]

Video interview - https://www.youtube.com/watch?v=aYhUPpEPVv4

Transcript - https://aging-us.net/2024/04/22/longevity-aging-series-s2-e1-dr-irina-conboy-and-xiaoyue-serafina-mei/

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Keywords - aging, DNA methylation, epigenetics, clocks’ fail-test, biological noise

About Longevity & Aging Series

In its second season, the Longevity & Aging Series is a monthly video series that features esteemed researchers discussing the latest in aging research with a focus on their studies published by Aging (Aging-US).

Learn more - https://www.aging-us.com/longevity

About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Aging is indexed by PubMed/Medline (abbreviated as “Aging (Albany NY)”), PubMed Central, Web of Science: Science Citation Index Expanded (abbreviated as “Aging‐US” and listed in the Cell Biology and Geriatrics & Gerontology categories), Scopus (abbreviated as “Aging” and listed in the Cell Biology and Aging categories), Biological Abstracts, BIOSIS Previews, EMBASE, META (Chan Zuckerberg Initiative) (2018-2022), and Dimensions (Digital Science).

Please visit our website at https://www.Aging-US.com​​ and connect with us:

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Aging is still shrouded in proverbial darkness. But, some researchers hypothesize that aging may be linked to stem cell exhaustion. Stemness, the ability of a cell to differentiate into various cell types, is an essential characteristic defining the functionality of stem cells. It has been observed that stem cells seem to diminish with age, although the precise role of stem cells in human aging remains to be elucidated.

“Among the biological pathways associated with aging, we can highlight stem cell exhaustion, which argues that during normal aging, the decrease in the number or activity of these cells contributes to physiological dysfunction in aged tissues [4].”

In a new study, researchers Gabriel Arantes dos Santos, Gustavo Daniel Vega Magdaleno and João Pedro de Magalhães from the Universidade de Sao Paulo, University of Birmingham and the University of Liverpool applied a machine learning method to detect stemness signatures from transcriptome data of healthy human tissues. Their research paper was published on April 4, 2024, and chosen as the cover of Aging’s Volume 16, Issue 7, entitled, “Evidence of a pan-tissue decline in stemness during human aging.”

Full blog - https://aging-us.org/2024/04/first-evidence-of-a-pan-tissue-decline-in-stemness-during-human-aging/

Paper DOI - https://doi.org/10.18632/aging.205717

Corresponding author - João Pedro de Magalhães - [email protected]

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Keywords - aging, longevity, stem cells, transcriptomics, senescence

About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Aging is indexed by PubMed/Medline (abbreviated as “Aging (Albany NY)”), PubMed Central, Web of Science: Science Citation Index Expanded (abbreviated as “Aging‐US” and listed in the Cell Biology and Geriatrics & Gerontology categories), Scopus (abbreviated as “Aging” and listed in the Cell Biology and Aging categories), Biological Abstracts, BIOSIS Previews, EMBASE, META (Chan Zuckerberg Initiative) (2018-2022), and Dimensions (Digital Science).

Please visit our website at https://www.Aging-US.com​​ and connect with us:

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BUFFALO, NY- April 17, 2024 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 16, Issue 7, entitled, “The impact of continuous and intermittent ketogenic diets on cognitive behavior, motor function, and blood lipids in TgF344-AD rats.”

Studies suggest that ketogenic diets (KD) may improve memory in mouse models of aging and Alzheimer’s disease (AD). In this new study, researchers Jennifer M. Rutkowsky, Zabrisky Roland, Anthony Valenzuela, An B. Nguyen, Heui Hye Park, Natalie Six, Ilknur Dursun, Kyoungmi Kim, Pamela J. Lein, and Jon J. Ramsey from the University of California Davis and Istinye University determined whether a continuous or intermittent KD (IKD) enhanced cognitive behavior in the TgF344-AD rat model of AD.

“[...] it remains to be determined whether long-term consumption of a ketogenic diet can mitigate declines in cognitive or motor behavior in a rat model of AD. Therefore, the current study aimed to determine whether a KD improves cognitive or motor behavior in the TgF344-AD rat.”

At 6 months-old, TgF344-AD and wild-type (WT) littermates were placed on a control (CD), KD, or IKD (morning CD and afternoon KD) provided as two meals per day for 2 or 6 months. Cognitive and motor behavior and circulating β-hydroxybutyrate (BHB), AD biomarkers and blood lipids were assessed. Animals on a KD diet had elevated circulating BHB, with IKD levels intermediate to CD and KD.

TgF344-AD rats displayed impaired spatial learning memory in the Barnes maze at 8 and 12 months of age and impaired motor coordination at 12 months of age. Neither KD nor IKD improved performance compared to CD. At 12 months of age, TgF344-AD animals had elevated blood lipids. IKD reduced lipids to WT levels with KD further reducing cholesterol below WT levels.

“[...] the IKD or KD did not improve motor coordination or spatial learning memory compared to the control diet. However, KD, and to a lesser extent IKD, mitigated elevations in plasma lipids in the TgF344-AD rats. Furthermore, the KD diet decreased plasma levels of total Tau in females.”

DOI - https://doi.org/10.18632/aging.205741

Corresponding author - Jennifer M. Rutkowsky - [email protected]

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Keywords - aging, ketogenic diet, Alzheimer’s disease, cognitive behavior, motor function, lipids

About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Please visit our website at https://www.Aging-US.com​​ and connect with us:

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BUFFALO, NY- April 15, 2024 – A new #researchpaper was #published on the #cover of Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 16, Issue 7, entitled, “Evidence of a pan-tissue decline in stemness during human aging.”

Despite their biological importance, the role of stem cells in human aging remains to be elucidated. In a new study, researchers Gabriel Arantes dos Santos, Gustavo Daniel Vega Magdaleno and João Pedro de Magalhães from the Universidade de Sao Paulo, University of Birmingham and the University of Liverpool applied a machine learning method to detect stemness signatures from transcriptome data of healthy human tissues.

“In this work, we applied a machine learning methodology to GTEx transcriptome data and assigned stemness scores to 17,382 healthy samples from 30 human tissues aged between 20 and 79 years.”

The team found that ~60% of the studied tissues exhibit a significant negative correlation between the subject's age and stemness score. The only significant exception was the uterus, where they observed an increased stemness with age. Moreover, the researchers observed that stemness is positively correlated with cell proliferation and negatively correlated with cellular senescence. Finally, they also observed a trend that hematopoietic stem cells derived from older individuals might have higher stemness scores.

“In conclusion, we assigned stemness scores to human samples and show evidence of a pan-tissue loss of stemness during human aging, which adds weight to the idea that stem cell deterioration may contribute to human aging.”

DOI - https://doi.org/10.18632/aging.205717

Corresponding author - João Pedro de Magalhães - [email protected]

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Keywords - aging, longevity, stem cells, transcriptomics, senescence

About Aging-US

Aging publishes research papers in all fields of aging research including but not limited, aging from yeast to mammals, cellular senescence, age-related diseases such as cancer and Alzheimer’s diseases and their prevention and treatment, anti-aging strategies and drug development and especially the role of signal transduction pathways such as mTOR in aging and potential approaches to modulate these signaling pathways to extend lifespan. The journal aims to promote treatment of age-related diseases by slowing down aging, validation of anti-aging drugs by treating age-related diseases, prevention of cancer by inhibiting aging. Cancer and COVID-19 are age-related diseases.

Aging is indexed by PubMed/Medline (abbreviated as “Aging (Albany NY)”), PubMed Central, Web of Science: Science Citation Index Expanded (abbreviated as “Aging‐US” and listed in the Cell Biology and Geriatrics & Gerontology categories), Scopus (abbreviated as “Aging” and listed in the Cell Biology and Aging categories), Biological Abstracts, BIOSIS Previews, EMBASE, META (Chan Zuckerberg Initiative) (2018-2022), and Dimensions (Digital Science).

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