

Aging-US
Aging (Aging-US) Podcast
Aging-US is dedicated to advancing our understanding of the biological mechanisms that drive aging and the development of age-related diseases. Our mission is to serve as a platform for high-quality research that uncovers the cellular, molecular, and systemic processes underlying aging, and translates these insights into strategies to extend healthspan and delay the onset of chronic disease.
Read about the Aging (Aging-US) Scientific Integrity Process: https://aging-us.com/scientific-integrity
Read about the Aging (Aging-US) Scientific Integrity Process: https://aging-us.com/scientific-integrity
Episodes
Mentioned books

Nov 30, 2023 • 4min
Aging Modulates Extracellular Vesicles of Epidermal Keratinocytes
BUFFALO, NY- November 30, 2023 – 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 15, Issue 22, entitled, “Chronological aging impacts abundance, function and microRNA content of extracellular vesicles produced by human epidermal keratinocytes.”
The disturbance of intercellular communication is one of the hallmarks of aging. In their new study, researchers Taku Nedachi, Christelle Bonod, Julie Rorteau, Wafae Chinoune, Yuri Ishiuchi, Sandrine Hughes, Benjamin Gillet, Nicolas Bechetoille, Dominique Sigaudo-Roussel, and Jérôme Lamartine from the University of Lyon, Toyo University and Gattefossé SAS aimed to clarify the impact of chronological aging on extracellular vesicles (EVs), a key mode of communication in mammalian tissues.
“The present study was therefore conducted to elucidate whether the characteristics of EVs released from cultured human keratinocytes can be modulated during aging process.”
The researchers focused on epidermal keratinocytes, the main cells of the outer protective layer of the skin which is strongly impaired in the skin of elderly. EVs were purified from conditioned medium of primary keratinocytes isolated from infant or aged adult skin. A significant increase of the relative number of EVs released from aged keratinocytes was observed whereas their size distribution was not modified.
By small RNA sequencing, the researchers described a specific microRNA (miRNA) signature of aged EVs with an increase abundance of miR-30a, a key regulator of barrier function in human epidermis. EVs from aged keratinocytes were found to be able to reduce the proliferation of young keratinocytes, to impact their organogenesis properties in a reconstructed epidermis model and to slow down the early steps of skin wound healing in mice, three features observed in aged epidermis. This work reveals that intercellular communication mediated by EVs is modulated during aging process in keratinocytes and might be involved in the functional defects observed in aged skin.
“To conclude, we have shown here that aging modulates EVs abundance, function and microRNA content in human keratinocytes.”
DOI - https://doi.org/10.18632/aging.205245
Corresponding author - Jérôme Lamartine - jerome.lamartine@univ-lyon1.fr
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Keywords - aging, keratinocytes, microRNA, senescence, exosomes
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 https://www.Aging-US.com and connect with us:
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Nov 28, 2023 • 4min
Anti-Aging Effects of 1,5-Anhydro-D-Fructose on Brain Diseases via AMPK Activation
BUFFALO, NY- November 28, 2023 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 21, entitled, “1,5-anhydro-D-fructose induces anti-aging effects on aging-associated brain diseases by increasing 5’-adenosine monophosphate-activated protein kinase activity via the peroxisome proliferator-activated receptor-γ co-activator-1α/brain-derived neurotrophic factor pathway.”
5’-Adenosine monophosphate-activated protein kinase (AMPK) is a metabolic sensor that serves as a cellular housekeeper; it also controls energy homeostasis and stress resistance. Thus, correct regulation of this factor can enhance health and survival. AMPK signaling may have a critical role in aging-associated brain diseases. Some in vitro studies have shown that 1,5-anhydro-D-fructose (1,5-AF) induces AMPK activation.
In this new study, researchers Kiyoshi Kikuchi, Shotaro Otsuka, Seiya Takada, Kazuki Nakanishi, Kentaro Setoyama, Harutoshi Sakakima, Eiichiro Tanaka, and Ikuro Maruyama from Kagoshima University investigated the effects of 1,5-AF on the AMPK/PGC-1α/BDNF pathway in multiple animal models of human aging-associated brain diseases.
“In the present study, we experimentally evaluated the effects of 1,5-AF on aging-associated brain diseases in vivo using an animal model of acute ischemic stroke (AIS), stroke-prone spontaneously hypertensive rats (SHRSPs), and the spontaneous senescence-accelerated mouse-prone 8 (SAMP8) model.”
In the AIS model, intraperitoneal injection of 1,5-AF reduced cerebral infarct volume, neurological deficits, and mortality. In SHRSPs, oral administration of 1,5-AF reduced blood pressure and prolonged survival. In the SAMP8 model, oral administration of 1,5-AF alleviated aging-related decline in motor cognitive function. Although aging reduced the expression levels of peroxisome proliferator-activated receptor-γ co-activator-1α (PGC-1α) and brain-derived neurotrophic factor (BDNF), the researchers found that 1,5-AF activated AMPK, which led to upregulation of the PGC-1α/BDNF pathway.
“Our results suggest that 1,5-AF can induce endogenous neurovascular protection, potentially preventing aging-associated brain diseases. Clinical studies are needed to determine whether 1,5-AF can prevent aging-associated brain diseases.”
DOI - https://doi.org/10.18632/aging.205228
Corresponding authors - Kiyoshi Kikuchi - kikuchi_kiyoshi@kurume-u.ac.jp, and Ikuro Maruyama - maruyama-i@eva.hi-ho.ne.jp
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Keywords - aging, AMP-activated protein kinases, brain-derived neurotrophic factor, peroxisome proliferator-activated receptors, blood pressure
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 https://www.Aging-US.com and connect with us:
SoundCloud - https://soundcloud.com/Aging-Us
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Nov 22, 2023 • 3min
Mitochondria-Targeting Antibiotics Extend Lifespan in C. Elegans
BUFFALO, NY- November 22, 2023 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 21, entitled, “Antibiotics that target mitochondria extend lifespan in C. elegans.”
Aging is a continuous degenerative process caused by a progressive decline of cell and tissue functions in an organism. It is induced by the accumulation of damage that affects normal cellular processes, ultimately leading to cell death. It has been speculated for many years that mitochondria play a key role in the aging process.
In this new study, researchers Gloria Bonuccelli, Darren R. Brooks, Sally Shepherd, Federica Sotgia, and Michael P. Lisanti from the University of Salford aimed to characterize the implications of mitochondria in aging using Caenorhabditis elegans (C. elegans) as an organismal model. The C. elegans were treated with a panel of mitochondrial inhibitors and assessed for survival.
“In our study, we assessed survival by evaluating worm lifespan, and we assessed aging markers by evaluating the pharyngeal muscle contraction, the accumulation of lipofuscin pigment and ATP levels.”
Their results show that treatment of worms with either doxycycline, azithromycin (inhibitors of the small and the large mitochondrial ribosomes, respectively), or a combination of both, significantly extended median lifespan of C. elegans, enhanced their pharyngeal pumping rate, reduced their lipofuscin content and their energy consumption (ATP levels), as compared to control untreated worms, suggesting an aging-abrogating effect for these drugs. Similarly, DPI, an inhibitor of mitochondrial complex I and II, was capable of prolonging the median lifespan of treated worms. On the other hand, subjecting worms to vitamin C, a pro-oxidant, failed to extend C. elegans lifespan and upregulated its energy consumption, revealing an increase in ATP level.
“Therefore, our longevity study reveals that mitochondrial inhibitors (i.e., mitochondria-targeting antibiotics) could abrogate aging and extend lifespan in C. elegans.”
DOI - https://doi.org/10.18632/aging.205229
Corresponding authors - Michael P. Lisanti - m.p.lisanti@salford.ac.uk, and Federica Sotgia - f.sotgia@salford.ac.uk
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Keywords - aging, C. elegans, lifespan, lipofuscin, antibiotics, mitochondria, metabolism, DPI
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 https://www.Aging-US.com and connect with us:
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Nov 21, 2023 • 3min
Parental Age Effect on the Longevity and Healthspan of Flies and Worms
BUFFALO, NY- November 16, 2023 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 21, entitled, “Parental age effect on the longevity and healthspan in Drosophila melanogaster and Caenorhabditis elegans.”
Several studies have investigated the effect of parental age on biological parameters such as reproduction, lifespan, and health; however, the results have been inconclusive, largely due to inter-species variation and/or modest effect sizes.
In their new study, researchers Camille Lenzi, Alexis Piat, Pascal Schlich, Judith Ducau, Jean-Claude Bregliano, Hugo Aguilaniu, and Anne Laurençon from the IM Projet, Caduceum, INRAE, IBDM, Instituto Serrapilheira, and Universite Claude Bernard-Lyon 1 examined the effect of parental age on the lifespan, reproductive capacity, and locomotor activity of genetic isogenic lines of the nematode Caenorhabditis elegans and the fruit fly Drosophila melanogaster.
“We decided to investigate parental age impact on the lifespan of their progeny on selected genomes of flies and worms to gain insights on the molecular mechanisms at work.”
The researchers found that the progeny of successive generations of old parents had significantly shorter lifespans than the progeny of young parents in both species. Moreover, they investigated the fertility, fecundity, and locomotor activity of C. elegans. Interestingly, both the shorter lifespan and deteriorated healthspan of the progeny were significantly improved by switching to only one generation of younger parents.
“Collectively, these data demonstrate that the detrimental effect of older parental age on the longevity of the progeny can be reversed, suggesting the existence of a beneficial non–genetic mechanism.”
DOI - https://doi.org/10.18632/aging.205098
Corresponding author - Anne Laurençon - anne.laurencon@ens-lyon.fr
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Keywords - aging, life span, intergenerational plasticity, maternal effect, nematode, drosophila
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 https://www.Aging-US.com and connect with us:
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Nov 15, 2023 • 3min
Behavioral, Morphological and Transcriptomic Changes in a Tauopathy Mouse Model
BUFFALO, NY- November 15, 2023 – 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 15, Issue 21, entitled, “Longitudinal characterization of behavioral, morphological and transcriptomic changes in a tauopathy mouse model.”
Neurodegenerative disorders, such as Alzheimer’s disease (AD), have the gradual onset of neurobiological changes preceding clinical diagnosis by decades. In their new study, researchers Qing Cao, Manasa Kumar, Allea Frazier, Jamal B. Williams, Shengkai Zhao, and Zhen Yan from the State University of New York at Buffalo’s Jacobs School of Medicine and Biomedical Sciences aimed to elucidate how brain dysfunction proceeds in neurodegenerative disorders.
“[...] we performed longitudinal characterization of behavioral, morphological, and transcriptomic changes in a tauopathy mouse model, P301S transgenic mice.”
P301S mice exhibited cognitive deficits as early as 3 months old, and deficits in social preference and social cognition at 5–6 months. They had a significant decrease of arborization in basal dendrites of hippocampal pyramidal neurons from 3 months and apical dendrites of PFC pyramidal neurons at 9 months. Transcriptomic analysis of genome-wide changes revealed the enrichment of synaptic gene upregulation at 3 months of age, while most of these synaptic genes were downregulated in PFC and hippocampus of P301S mice at 9 months. These time-dependent changes in gene expression may lead to progressive alterations of neuronal structure and function, resulting in the manifestation of behavioral symptoms in tauopathies.
“In conclusion, our longitudinal characterization of behavioral, morphological and transcriptomic changes in a tauopathy mouse model is to elucidate potential mechanisms that drive the progression of AD and related neurodegenerative disorders. Manipulation of key molecular players coupled with electrophysiological measurements of neuronal functions in future studies will help identify early intervention strategies for these diseases.”
DOI - https://doi.org/10.18632/aging.205057
Corresponding author - Zhen Yan - zhenyan@buffalo.edu
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Keywords - aging, Alzheimer’s disease, tau, cognitive behaviors, transcriptomic, neuronal morphology
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 https://www.Aging-US.com and connect with us:
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Nov 14, 2023 • 5min
Alcohol Consumption and Epigenetic Age Acceleration Across Adulthood
BUFFALO, NY- November 14, 2023 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 20, entitled, “Alcohol consumption and epigenetic age acceleration across human adulthood.”
The alcohol-associated biological aging remains to be studied across adulthood. In their new study, researchers Mengyao Wang, Yi Li, Meng Lai, Drew R. Nannini, Lifang Hou, Roby Joehanes, Tianxiao Huan, Daniel Levy, Jiantao Ma, and Chunyu Liu from Boston University School of Public Health, Northwestern University Feinberg School of Medicine, National Institutes of Health, Framingham Heart Study, and Tufts University conducted linear regression analyses to investigate the associations between alcohol consumption and two DNA methylation-based biological age acceleration metrics in 3823 Framingham Heart Study participants (24–92 years and 53.8% women) adjusting for covariates.
“We also investigated whether the two epigenetic aging metrics mediated the association of alcohol consumption with hypertension.”
They found that higher long-term average alcohol consumption was significantly associated with biological age acceleration assessed by GrimAge acceleration (GAA) and PhenoAge acceleration (PAA) in middle-aged (45–64 years, n = 1866) and older (65–92 years, n = 1267) participants while not in young participants (24–44 years, n = 690). For example, one additional standard drink of alcohol (~14 grams of ethanol per day) was associated with a 0.71 ± 0.15-year (p = 2.1e-6) and 0.60 ± 0.18-year (p = 7.5e-4) increase in PAA in middle-aged and older participants, respectively, but the association was not significant in young participants (p = 0.23). One additional standard serving of liquor (~14 grams of ethanol) was associated with a greater increase in GAA (0.82-year, p = 4.8e-4) and PAA (1.45-year, p = 7.4e-5) than beer (GAA: 0.45-year, p = 5.2e-4; PAA: 0.48-year, p = 0.02) and wine (GAA: 0.51-year, p = 0.02; PAA: 0.91-year, p = 0.008) in middle-aged participant group.
“We observed that up to 28% of the association between alcohol consumption and hypertension was mediated by GAA or PAA in the pooled sample. Our findings suggest that alcohol consumption is associated with greater biological aging quantified by epigenetic aging metrics, which may mediate the association of alcohol consumption with quantitative traits, such as hypertension.”
DOI - https://doi.org/10.18632/aging.205153
Corresponding authors - Jiantao Ma - jiantao.ma@tufts.edu, and Chunyu Liu - liuc@bu.edu
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Keywords - aging, alcohol consumption, epigenetic aging, DNA methylation, hypertension
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 https://www.Aging-US.com and connect with us:
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Nov 9, 2023 • 6min
How a Receptor Boosts WNT Signals in Pancreatic Cancer
Pancreatic cancer is one of the deadliest forms of cancer, with a very low survival rate and limited treatment options. Understanding the molecular mechanisms that drive the development and progression of this disease is crucial for finding new ways to prevent and treat it. One of the key players in pancreatic cancer is the WNT signaling pathway, which regulates many aspects of cell growth, differentiation and survival. WNT signaling is often dysregulated in pancreatic cancer, leading to uncontrolled cell proliferation, invasion and resistance to therapy.
“The canonical WNT pathway is reportedly an essential protagonist in organ development as well as oncogenesis in multiple cancers.”
How does WNT signaling become so powerful in pancreatic cancer cells? In a new study, researchers Jing Wang, Dominik T. Koch, Felix O. Hofmann, Daniel Härtwig, Iris Beirith, Klaus Peter Janssen, Alexandr V. Bazhin, Hanno Niess, Jens Werner, Bernhard W. Renz, and Matthias Ilmer from Ludwig-Maximilians-University, University of Science and Technology of China, Technical University of Munich, and German Cancer Consortium revealed a novel role for a receptor called LGR6 in enhancing WNT signals in this disease. Their research paper was published on September 27, 2023, in Aging’s Volume 15, Issue 20, entitled, “WNT enhancing signals in pancreatic cancer are transmitted by LGR6.”
Full blog - https://aging-us.org/2023/11/how-a-receptor-boosts-wnt-signals-in-pancreatic-cancer/
Paper DOI - https://doi.org/10.18632/aging.205101
Corresponding author - Matthias Ilmer - mailmer@med.lmu.de
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Keywords - aging, pancreatic ductal adenocarcinoma, WNT signaling, epithelial-mesenchymal transition, LGR6, cancer stem cells
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 https://www.Aging-US.com and connect with us:
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Nov 8, 2023 • 4min
A New Connection Between The Gut Microbiota and Prostate Inflammation in Aging Men
BUFFALO, NY- November 8, 2023 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 20, entitled, “Tissue immunoexpression of IL-6 and IL-18 in aging men with BPH and MetS and their relationship with lipid parameters and gut microbiota-derived short chain fatty acids.”
Recent studies indicate that inflammation is one of the causes of the development of benign prostatic hyperplasia (BPH). Inflammation may result from past infections, metabolic disorders, but also from the state of functioning of the intestinal microbiota.
In this new study, researchers Weronika Ratajczak, Maria Laszczyńska, Aleksandra Rył, Barbara Dołęgowska, Olimpia Sipak, Ewa Stachowska, Marcin Słojewski, and Anna Lubkowska from Poland’s Pomeranian Medical University and State University of Applied Sciences aimed to assess whether the diagnostic lipid parameters for metabolic syndrome and short-chain fatty acids (SCFAs) are related to the immunoexpression of interleukins in prostate tissue with benign hyperplasia. The study involved 103 men with BPH, who were divided into two groups depending on the presence of MetS.
“We analysed tissue immunoexpression of two proinflammatory interleukins: IL-6, which is known to be involved in the development of BPH, and IL-18, which has not been analysed so far.”
The results of their study indicated that men with BPH + MetS in the stroma of the prostate have a significantly higher overall percentage of IL-6+ cells compared to men without MetS (p = 0.034). The analysis of IL-18 immunoexpression in prostate tissue indicated that in men with BPH + MetS, the glandular part of the prostate had a significantly higher percentage of cells with strong IL-18 expression (p = 0.040). They also noticed a relationship between tissue expression of IL-6 and IL-18 and lipid parameters (TG and HDL).
“We conclude that lipid disorders occurring in men with BPH increase inflammation in the prostate gland. Moreover, it has also been demonstrated for the first time that, indirectly, through SCFAs, the gut microbiota can act to prevent or create an inflammatory microenvironment in the prostate gland.”
DOI - https://doi.org/10.18632/aging.205091
Corresponding author - Anna Lubkowska - anna.lubkowska@pum.edu.pl
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Keywords - aging, benign prostatic hyperplasia (BPH), metabolic syndrome (MetS), lipids, interleukin 6 (IL-6), interleukin 18 (IL-18), short-chain fatty acids
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 https://www.Aging-US.com and connect with us:
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Nov 7, 2023 • 4min
Deciphering Reproductive Aging in Women Using a NOD/SCID Mouse Model
BUFFALO, NY- November 7, 2023 – A new #researchpaper was #published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 20, entitled, “Deciphering reproductive aging in women using a NOD/SCID mouse model for distinct physiological ovarian phenotypes.”
Female fertility is negatively correlated with age, with noticeable declines in oocyte quantity and quality until menopause. To understand this physiological process and evaluate human approaches for treating age-related infertility, preclinical studies in appropriate animal models are needed. In this new study, researchers María Marchante, Noelia Ramirez-Martin, Anna Buigues, Jessica Martinez, Nuria Pellicer, Antonio Pellicer, and Sonia Herraiz from IVIRMA, University of Valencia and Instituto Investigación Sanitaria La Fe aimed to characterize an immunodeficient physiological aging mouse model displaying ovarian characteristics of different stages during women's reproductive life.
“The main purpose of our study was to establish a physiological ovarian aging mouse model that could be employed to evaluate potential therapeutic interventions derived from human origin.”
NOD/SCID mice of different ages (8-, 28-, and 36–40-week-old) were employed to mimic ovarian phenotypes of young, Advanced Maternal Age (AMA), and old women (~18–20-, ~36–38-, and >45-years-old, respectively). Mice were stimulated, mated, and sacrificed to recover oocytes and embryos. Then, ovarian reserve, follicular growth, ovarian stroma, mitochondrial dysfunction, and proteomic profiles were assessed. Age-matched C57BL/6 mice were employed to cross-validate the reproductive outcomes.
The quantity and quality of oocytes were decreased in AMA and Old mice. These age-related effects associated spindle and chromosome abnormalities, along with decreased developmental competence to blastocyst stage. Old mice had less follicles, impaired follicle activation and growth, an ovarian stroma inconducive to growth, and increased mitochondrial dysfunctions. Proteomic analysis corroborated these histological findings. Based on that, NOD/SCID mice can be used to model different ovarian aging phenotypes and potentially test human anti-aging treatments.
“In summary, in this study we characterized the quality of the ovarian microenvironment and reproductive outcomes of an immunodeficient murine model of physiological ovarian aging by evaluating fertility outcomes, ovarian reserve and stroma, mitochondrial dysfunctions, and the ovarian proteome at different stages. This model adequately mimicked the characteristics of the reproductive stages in women, without external agents compromising folliculogenesis, or disrupting molecular mechanisms and ovarian function, which could mask the processes of physiological aging.”
DOI - https://doi.org/10.18632/aging.205086
Corresponding author - Sonia Herraiz - sonia_herraiz@iislafe.es
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.
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Nov 1, 2023 • 4min
Parkinson Disease and Normal Aging
BUFFALO, NY- November 1, 2023 – A new research perspective was published in Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 15, Issue 20, entitled, “Cholinergic centro-cingulate network in Parkinson disease and normal aging.”
In their new perspective, researchers Nicolaas I. Bohnen, Sygrid van der Zee and Roger Albin from University of Michigan, Veterans Administration Ann Arbor Healthcare System, University of Groningen, and the University Medical Center Groningen discussed Parkinson disease (PD). Decreased cholinergic binding within the recently identified centro-cingulate brain network has been shown to robustly correlate with the severity of cognitive impairment in PD. This network with key hubs within the cingulum, operculum and peri-central cortical regions also correlates with elements of parkinsonian motor impairments, including postural instability and gait difficulties, such as falls or freezing.
“We recently reported novel data-driving findings suggesting that cholinergic innervation deficits in centro-cingulate brain regions may be an important contributor to cognitive impairments in PD [1].”
MRI neuroimaging studies have shown that the anterior midcingulate cortex is a key node for cognitive aspects of movement generation, i.e., intentional motor control. Recent evidence also suggests a novel aspect of organization of primary motor cortex, describing “effector” regions for fine movement control intercalated with interlinked “inter-effector” regions devoted to whole-body control.
A distinguishing feature of inter-effector regions is tight linkage to the cingular and opercular regions. Such inter-effector regions have been proposed to be part of a greater somato-cognitive action network necessary for integration of goals and movement. Recent evidence also points to vulnerabilities of cholinergic nerve terminals in the centro-cingulate network in older non-PD adults. These features of normal aging underscore that cortical cholinergic terminal losses in age-associated neurodegenerative disorders are likely not exclusively the result of disease-specific etiologies but also related to otherwise normal aging.
“Practical implications of this overlap are that addressing disease-specific and general aging etiologies involved in neurodegeneration, may be of benefit in age-associated neurodegenerative disorders where significant cholinergic systems degeneration is present.”
DOI - https://doi.org/10.18632/aging.205209
Corresponding author - Nicolaas I. Bohnen - nbohnen@umich.edu
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Keywords - aging, centro-cingulate network, cholinergic, cognition, motor, Parkinson disease
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.
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