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Fang Y, Peck MR, Quinn K, Chapman JE, Medina D, McFadden SA, Bartke A, Hascup KN, Hascup ER. Senolytic Intervention Improves Cognition, Metabolism, and Adiposity in Female APP NL-F/NL-F Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.12.571277. [PMID: 38168356 PMCID: PMC10760014 DOI: 10.1101/2023.12.12.571277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Senescent cells accumulate throughout the body and brain contributing to unhealthy aging and Alzheimer's disease (AD). The APP NL-F/NL-F amyloidogenic AD mouse model exhibits increased markers of senescent cells and the senescence-associated secretory phenotype (SASP) in visceral white adipose tissue before plaque accumulation and cognitive decline. We hypothesized that senolytic intervention would alleviate cellular senescence thereby improving spatial memory in APP NL-F/NL-F mice. Thus, four month old male and female APP NL-F/NL-F mice were treated monthly with vehicle, 5 mg/kg Dasatinib + 50 mg/kg Quercetin, or 100 mg/kg Fisetin. Blood glucose levels, energy metabolism, spatial memory, amyloid burden, and senescent cell markers were assayed. Dasatinib + Quercetin treatment in female APP NL-F/NL-F mice increased oxygen consumption and energy expenditure resulting in decreased body mass. White adipose tissue mass was decreased along with senescence markers, SASP, blood glucose, and plasma insulin and triglycerides. Hippocampal senescence markers and SASP were reduced along with soluble and insoluble amyloid-β (Aβ) 42 and senescence associated-β-gal activity leading to improved spatial memory. Fisetin had negligible effects on these measures in female APP NL-F/NL-F mice while neither senolytic intervention altered these parameters in the male mice. Considering women have a greater risk of dementia, identifying senotherapeutics appropriate for sex and disease stage is necessary for personalized medicine.
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McFadden SA, Peck MR, Sime LN, Cox MF, Ikiz ED, Findley CA, Quinn K, Fang Y, Bartke A, Hascup ER, Hascup KN. Thermotherapy has Sexually Dimorphic Responses in APP/PS1 Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.26.586836. [PMID: 38586039 PMCID: PMC10996586 DOI: 10.1101/2024.03.26.586836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
A thermoregulatory decline occurs with age due to changes in muscle mass, vasoconstriction, and metabolism that lowers core body temperature (Tc). Although lower Tc is a biomarker of successful aging, we have previously shown this worsens cognitive performance in the APP/PS1 mouse model of Alzheimer's disease (AD) [1]. We hypothesized that elevating Tc with thermotherapy would improve metabolism and cognition in APP/PS1 mice. From 6-12 months of age, male and female APP/PS1 and C57BL/6 mice were chronically housed at 23 or 30°C. At 12 months of age, mice were assayed for insulin sensitivity, glucose tolerance, and spatial cognition. Plasma, hippocampal, and peripheral (adipose, hepatic, and skeletal muscle) samples were procured postmortem and tissue-specific markers of amyloid accumulation, metabolism, and inflammation were assayed. Chronic 30°C exposure increased Tc in all groups except female APP/PS1 mice. All mice receiving thermotherapy had either improved glucose tolerance or insulin sensitivity, but the underlying processes responsible for these effects varied across sexes. In males, glucose regulation was influenced predominantly by hormonal signaling in plasma and skeletal muscle glucose transporter 4 expression, whereas in females, this was modulated at the tissue level. Thermotherapy improved spatial navigation in male C57BL/6 and APP/PS1 mice, with the later attributed to reduced hippocampal soluble amyloid-β (Aβ)42. Female APP/PS1 mice exhibited worse spatial memory recall after chronic thermotherapy. Together, the data highlights the metabolic benefits of passive thermotherapy with potential nonpharmacological management for some individuals with AD, and provides further evidence for the necessity of adopting personalized patient care.
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Affiliation(s)
- Samuel A. McFadden
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Mackenzie R. Peck
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Lindsey N. Sime
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - MaKayla F. Cox
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Erol D. Ikiz
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Caleigh A. Findley
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Kathleen Quinn
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Yimin Fang
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Erin R. Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Kevin N. Hascup
- Department of Neurology, Dale and Deborah Smith Center for Alzheimer’s Research and Treatment, Neurosciences Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, USA
- Department of Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Springfield, IL, USA
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Villeda S, Brown-Borg H, Anderson R. Neurobiology of Aging: New Insights From Across the Research Spectrum. J Gerontol A Biol Sci Med Sci 2023; 78:869-871. [PMID: 37264524 PMCID: PMC10465077 DOI: 10.1093/gerona/glad110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Affiliation(s)
- Saul Villeda
- Department of Anatomy, University of California San Francisco, San Francisco, California, USA
- Bakar Aging Research Institute, San Francisco, California, USA
| | - Holly Brown-Borg
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, North Dakota, USA
| | - Rozalyn Anderson
- Department of Medicine, SMPH, University of Wisconsin-Madison, Madison, Wisconsin, USA
- GRECC William S Middleton Memorial Veterans Hospital, Madison, Wisconsin, USA
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