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Cararo-Lopes MM, Sadovnik R, Fu A, Suresh S, Gandu S, Firestein BL. Overexpression of α-Klotho isoforms promotes distinct Effects on BDNF-Induced Alterations in Dendritic Morphology. Mol Neurobiol 2024:10.1007/s12035-024-04171-y. [PMID: 38589756 DOI: 10.1007/s12035-024-04171-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 04/03/2024] [Indexed: 04/10/2024]
Abstract
α-Klotho (α-Kl) is a modulator of aging, neuroprotection, and cognition. Transcription of the Klotho gene produces two splice variants-a membrane protein (mKl), which can be cleaved and released into the extracellular milieu, and a truncated secreted form (sKl). Despite mounting evidence supporting a role for α-Kl in brain function, the specific roles of α-Kl isoforms in neuronal development remain elusive. Here, we examined α-Kl protein levels in rat brain and observed region-specific expression in the adult that differs between isoforms. In the developing hippocampus, levels of isoforms decrease after the third postnatal week, marking the end of the critical period for development. We overexpressed α-Kl isoforms in primary cultures of rat cortical neurons and evaluated effects on brain-derived neurotrophic factor (BDNF) signaling. Overexpression of either isoform attenuated BDNF-mediated signaling and reduced intracellular Ca2+ levels, with mKl promoting a greater effect. mKl or sKl overexpression in hippocampal neurons resulted in a partially overlapping reduction in secondary dendrite branching. Moreover, mKl overexpression increased primary dendrite number. BDNF treatment of neurons overexpressing sKl resulted in a dendrite branching phenotype similar to control neurons. In neurons overexpressing mKl, BDNF treatment restored branching of secondary and higher order dendrites close, but not distal, to the soma. Taken together, the data presented support the idea that sKl and mKl play distinct roles in neuronal development, and specifically, in dendrite morphogenesis.
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Affiliation(s)
- Marina Minto Cararo-Lopes
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Cell and Developmental Biology Graduate Program, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Ratchell Sadovnik
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Allen Fu
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Shradha Suresh
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Neuroscience Graduate Program, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Srinivasa Gandu
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Cell and Developmental Biology Graduate Program, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Bonnie L Firestein
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
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Zhang LY, Liu XY, Su AC, Hu YY, Zhang JG, Xian XH, Li WB, Zhang M. Klotho Upregulation via PPARγ Contributes to the Induction of Brain Ischemic Tolerance by Cerebral Ischemic Preconditioning in Rats. Cell Mol Neurobiol 2023; 43:1355-1367. [PMID: 35900650 DOI: 10.1007/s10571-022-01255-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 07/04/2022] [Indexed: 11/09/2022]
Abstract
Cerebral ischemic preconditioning (CIP)-induced brain ischemic tolerance protects neurons from subsequent lethal ischemic insult. However, the specific mechanisms underlying CIP remain unclear. In the present study, we explored the hypothesis that peroxisome proliferator-activated receptor gamma (PPARγ) participates in the upregulation of Klotho during the induction of brain ischemic tolerance by CIP. First we investigated the expression of Klotho during the brain ischemic tolerance induced by CIP. Lethal ischemia significantly decreased Klotho expression from 6 h to 7 days, while CIP significantly increased Klotho expression from 12 h to 7 days in the hippocampal CA1 region. Inhibition of Klotho expression by its shRNA blocked the neuroprotection induced by CIP. These results indicate that Klotho participates in brain ischemic tolerance by CIP. Furthermore, we tested the role of PPARγ in regulating Klotho expression after CIP. CIP caused PPARγ protein translocation to the nucleus in neurons in the CA1 region of the hippocampus. Pretreatment with GW9962, a PPARγ inhibitor, significantly attenuated the upregulation of Klotho protein and blocked the brain ischemic tolerance induced by CIP. Taken together, it can be concluded that Klotho upregulation via PPARγ contributes to the induction of brain ischemic tolerance by CIP.
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Affiliation(s)
- Ling-Yan Zhang
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Shijiazhuang, China
| | - Xi-Yun Liu
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China
| | - A-Chou Su
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China
| | - Yu-Yan Hu
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Shijiazhuang, China
| | - Jing-Ge Zhang
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Shijiazhuang, China
| | - Xiao-Hui Xian
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Shijiazhuang, China
| | - Wen-Bin Li
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Shijiazhuang, China
| | - Min Zhang
- Department of Pathophysiology, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei, People's Republic of China.
- Hebei Key Laboratory of Critical Disease Mechanism and Intervention, Shijiazhuang, China.
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Wang Y, Xiong X, Wang K, Bao Y, Zhang T, Ainiwaer D, Wang G, Li H, Sun Z. Peripheral Klotho protects the kidney and brain by regulating M2a/M2c macrophage polarization in d-gal-treated aged mice. Tissue Cell 2023. [PMID: 36863110 DOI: 10.1016/j.tice.2023.102049] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
In elderly individuals, aging can cause changes in the structure and function of one or more organs, increasing their susceptibility to various damage factors, especially the heart, kidney, brain and other important organs. Therefore, the incidence of cardiovascular disease, neurodegenerative diseases and chronic kidney disease in the elderly population is significantly higher than that in the general population. In our previous study, the hearts of aged mice did not express the antiaging protein Klotho (KL), but peripheral elevation of KL may significantly delay cardiac aging. The kidney and brain are the main organs that produce KL, but the effects and mechanism of peripheral KL supplementation on the kidney and hippocampus are still unclear. To study the effect and possible mechanism of KL against kidney and hippocampus aging, 60 male BALB/c mice were randomly divided into the Adult group, the KL group, the D-gal-induced Aged group, and the KL + Aged group. The results showed that KL increased anti-inflammatory M2a/M2c macrophages in the kidney and hippocampus of aging mice, significantly reduced tissue inflammation and oxidative stress, and improved organ function and aging status. More importantly, we demonstrate that despite the impermeable bloodbrain barrier in mice, peripherally administered KL surprisingly enhances M2-type microglia polarization, induces cognitive enhancement and reduces neuroinflammation. Cellular experimental results suggest that KL may play a role in delaying senescence by regulating the TLR4/Myd88/NF-κB signaling pathway to regulate macrophage polarization and reduce aging-related inflammation and oxidative stress.
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Affiliation(s)
- Yiping Wang
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China
| | - Xicheng Xiong
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China
| | - Kun Wang
- Laboratory Animal Centre, Xinjiang Medical University, Urumqi, Xinjiang 830000, China
| | - Yali Bao
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China; Xinjiang Key Laboratory of Molecular Biology for Endemic Diseases, Urumqi 830000, China
| | - Tian Zhang
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China; Xinjiang Key Laboratory of Molecular Biology for Endemic Diseases, Urumqi 830000, China
| | - Dina Ainiwaer
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China; Xinjiang Key Laboratory of Molecular Biology for Endemic Diseases, Urumqi 830000, China
| | - Gang Wang
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China
| | - Huihui Li
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China
| | - Zhan Sun
- Department of Pathophysiology, College of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang 830000, China; Xinjiang Key Laboratory of Molecular Biology for Endemic Diseases, Urumqi 830000, China.
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Klotho Regulated by Estrogen Plays a Key Role in Sex Differences in Stress Resilience in Rats. Int J Mol Sci 2023; 24:ijms24021206. [PMID: 36674721 PMCID: PMC9862442 DOI: 10.3390/ijms24021206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 01/11/2023] Open
Abstract
Klotho (KL) is a glycosyl hydrolase and aging-suppressor gene. Stress is a risk factor for depression and anxiety, which are highly comorbid with each other. The aim of this study is to determine whether KL is regulated by estrogen and plays an important role in sex differences in stress resilience. Our results showed that KL is regulated by estrogen in rat hippocampal neurons in vivo and in vitro and is essential for the estrogen-mediated increase in the number of presynaptic vesicular glutamate transporter 1 (Vglut1)-positive clusters on the dendrites of hippocampal neurons. The role of KL in sex differences in stress response was examined in rats using 3-week chronic unpredictable mild stress (CUMS). CUMS produced a deficit in spatial learning and memory, anhedonic-like behaviors, and anxiety-like behaviors in male but not female rats, which was accompanied by a reduction in KL protein levels in the hippocampus of male but not female rats. This demonstrated the resilience of female rats to CUMS. Interestingly, the knockdown of KL protein levels in the rat hippocampus of both sexes caused a decrease in stress resilience in both sexes, especially in female rats. These results suggest that the regulation of KL by estrogen plays an important role in estrogen-mediated synapse formation and that KL plays a critical role in the sex differences in cognitive deficit, anhedonic-like behaviors, and anxiety-like behaviors induced by chronic stress in rats, highlighting an important role of KL in sex differences in stress resilience.
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Kim D, Lee S, Choi JY, Lee J, Lee HJ, Min JY, Min KB. Association of α-klotho and lead and cadmium: A cross-sectional study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 843:156938. [PMID: 35753483 DOI: 10.1016/j.scitotenv.2022.156938] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 04/17/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Epigenetic aging is associated with harmful health effects such as oxidative stress from heavy metal exposure. We considered the relationship between genes and heavy metals in association with oxidative stress and then investigated the association between serum α- klotho and lead and cadmium exposure among adults in the United States from 2007 to 2016 participating in the National Health and Nutrition Examination Survey (NHANES). Samples included 9800 adults aged 40 to 79 years with measurements of serum α-klotho, lead and cadmium, and complete covariate data. Lead and cadmium levels were measured by inductively coupled plasma mass spectrometry and serum α-klotho levels were measured using enzyme-linked immunosorbent assay (ELISA). Multivariate linear regression analysis was used to estimate the association between serum α-klotho and blood lead, blood cadmium, and urinary cadmium. A percent increase in blood lead, blood cadmium, and urinary cadmium was associated with a statistically significant 4.0 % (p < 0.001), 2.0 %, (p = 0.003) and 1.0 % (p = 0.020) decrease in serum klotho. After adjustment, a percent increase in blood lead was associated with a statistically significant 4.0 % (p < 0.001) decrease in serum klotho; blood and urinary cadmium did not show any statistically significant associations after adjustment (β (95 % CI), p-value for blood cadmium: 0.00 (-0.02-0.01), p = 0.573; urinary cadmium: -0.01 (-0.03-0.01), p = 0.210). Mean serum klotho levels showed a statistically significant decreasing trend with increasing blood lead quartiles (unadjusted and all-adjusted geometric means and 95 % confidence intervals of serum klotho (in pg/mL) for Q1, Q2, Q3, and Q4: unadjusted: 827.49 (814.20-840.92), 811.92 (794.73-829.48), 791.48 (775.11-808.19), and 772.01 (754.23-790.29); adjusted: 830.64 (805.53-856.45), 816.07 (789.18-843.87), 800.71 (773.71-828.57), and 784.31 (757.94-811.59)). Blood lead and levels were negatively associated with serum α-klotho levels in a representative population of US adults. These results suggest that blood lead levels may be associated with the serum levels of a protein associated with cognition and aging. Further research is recommended to investigate the causality behind such relationship.
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Affiliation(s)
- Donghoon Kim
- Department of Preventive Medicine, College of Medicine, Seoul National University,103 Daehak-ro, Jongno gu, Seoul 110-799, South Korea
| | - Sohyae Lee
- Department of Preventive Medicine, College of Medicine, Seoul National University,103 Daehak-ro, Jongno gu, Seoul 110-799, South Korea; Integrated Major in Innovative Medical Science, Seoul National University Graduate School, Seoul, South Korea
| | - Ju-Young Choi
- Department of Preventive Medicine, College of Medicine, Seoul National University,103 Daehak-ro, Jongno gu, Seoul 110-799, South Korea
| | - Jaeho Lee
- Department of Preventive Medicine, College of Medicine, Seoul National University,103 Daehak-ro, Jongno gu, Seoul 110-799, South Korea; Integrated Major in Innovative Medical Science, Seoul National University Graduate School, Seoul, South Korea
| | - Hyo-Jung Lee
- Department of Preventive Medicine, College of Medicine, Seoul National University,103 Daehak-ro, Jongno gu, Seoul 110-799, South Korea
| | - Jin-Young Min
- Veterans Medical Research Institute, Veterans Health Service Medical Center, Seoul, South Korea.
| | - Kyoung-Bok Min
- Department of Preventive Medicine, College of Medicine, Seoul National University,103 Daehak-ro, Jongno gu, Seoul 110-799, South Korea; Institute of Health Policy and Management, Medical Research Center, Seoul National University, South Korea.
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Astragalus membranaceus treatment combined with caloric restriction may enhance genesis factors and decrease apoptosis in the hippocampus of rats. Arch Gerontol Geriatr 2022; 99:104584. [DOI: 10.1016/j.archger.2021.104584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/08/2021] [Accepted: 11/16/2021] [Indexed: 11/21/2022]
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Abstract
Klotho gene was originally recognized as a putative aging-suppressor and its prominent age-regulating effects are mostly attributed to the modulation of mineral homeostasis in the kidney. However, recent studies link alterations in hippocampal Klotho expression with cognitive impairment and neurodegenerative diseases. This suggests that hippocampal neurons require Klotho for health and proper functionality. Klotho protects against neuronal dysfunction and regulates several intracellular signaling pathways including oxidative stress response, inflammation, DNA damage, autophagy, endoplasmic reticulum stress response, and multiple types of cell death. Specifically, this chapter covers the current knowledge as to how Klotho protein affects the hippocampal neuronal cells, with special attention paid to underlying molecular mechanisms, and thus influences hippocampal development, hippocampal-dependent cognition, behavior, and motor skills as well as mediates neurodegenerative processes.
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Affiliation(s)
- Jennifer Mytych
- Department of Biotechnology, Institute of Biology and Biotechnology, Collegium Scientarium Naturalium, University of Rzeszow, Werynia, Poland.
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Xu L, Idrees M, Joo MD, Sidrat T, Wei Y, Song SH, Lee KL, Kong IK. Constitutive Expression of TERT Enhances β-Klotho Expression and Improves Age-Related Deterioration in Early Bovine Embryos. Int J Mol Sci 2021; 22:ijms22105327. [PMID: 34070219 PMCID: PMC8158768 DOI: 10.3390/ijms22105327] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 12/17/2022] Open
Abstract
Age-associated decline in oocyte quality is one of the dominant factors of low fertility. Aging alters several key processes, such as telomere lengthening, cell senescence, and cellular longevity of granulosa cells surrounding oocyte. To investigate the age-dependent molecular changes, we examined the expression, localization, and correlation of telomerase reverse transcriptase (TERT) and β-Klotho (KLB) in bovine granulosa cells, oocytes, and early embryos during the aging process. Herein, cumulus-oocyte complexes (COCs) obtained from aged cows (>120 months) via ovum pick-up (OPU) showed reduced expression of β-Klotho and its co-receptor fibroblast growth factor receptor 1 (FGFR1). TERT plasmid injection into pronuclear zygotes not only markedly enhanced day-8 blastocysts’ development competence (39.1 ± 0.8%) compared to the control (31.1 ± 0.5%) and D-galactose (17.9 ± 1.0%) treatment groups but also enhanced KLB and FGFR1 expression. In addition, plasmid-injected zygotes displayed a considerable enhancement in blastocyst quality and implantation potential. Cycloastragenol (CAG), an extract of saponins, stimulates telomerase enzymes and enhances KLB expression and alleviates age-related deterioration in cultured primary bovine granulosa cells. In conclusion, telomerase activation or constitutive expression will increase KLB expression and activate the FGFR1/β-Klotho pathway in bovine granulosa cells and early embryos, inhibiting age-related malfunctioning.
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Affiliation(s)
- Lianguang Xu
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (L.X.); (M.I.); (M.-D.J.); (T.S.); (Y.W.)
| | - Muhammad Idrees
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (L.X.); (M.I.); (M.-D.J.); (T.S.); (Y.W.)
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea
| | - Myeong-Don Joo
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (L.X.); (M.I.); (M.-D.J.); (T.S.); (Y.W.)
| | - Tabinda Sidrat
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (L.X.); (M.I.); (M.-D.J.); (T.S.); (Y.W.)
| | - Yiran Wei
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (L.X.); (M.I.); (M.-D.J.); (T.S.); (Y.W.)
| | - Seok-Hwan Song
- The Kingkong Co., Ltd., Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (S.-H.S.); (K.-L.L.)
| | - Kyeong-Lim Lee
- The Kingkong Co., Ltd., Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (S.-H.S.); (K.-L.L.)
| | - Il-Keun Kong
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (L.X.); (M.I.); (M.-D.J.); (T.S.); (Y.W.)
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea
- The Kingkong Co., Ltd., Gyeongsang National University, Jinju 52828, Gyeongnam Province, Korea; (S.-H.S.); (K.-L.L.)
- Correspondence: ; Tel.: +82-55-772-1942
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Dias GP, Murphy T, Stangl D, Ahmet S, Morisse B, Nix A, Aimone LJ, Aimone JB, Kuro-O M, Gage FH, Thuret S. Intermittent fasting enhances long-term memory consolidation, adult hippocampal neurogenesis, and expression of longevity gene Klotho. Mol Psychiatry 2021; 26:6365-6379. [PMID: 34031536 PMCID: PMC8760057 DOI: 10.1038/s41380-021-01102-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 03/19/2021] [Accepted: 04/06/2021] [Indexed: 02/03/2023]
Abstract
Daily calorie restriction (CR) and intermittent fasting (IF) enhance longevity and cognition but the effects and mechanisms that differentiate these two paradigms are unknown. We examined whether IF in the form of every-other-day feeding enhances cognition and adult hippocampal neurogenesis (AHN) when compared to a matched 10% daily CR intake and ad libitum conditions. After 3 months under IF, female C57BL6 mice exhibited improved long-term memory retention. IF increased the number of BrdU-labeled cells and neuroblasts in the hippocampus, and microarray analysis revealed that the longevity gene Klotho (Kl) was upregulated in the hippocampus by IF only. Furthermore, we found that downregulating Kl in human hippocampal progenitor cells led to decreased neurogenesis, whereas Kl overexpression increased neurogenesis. Finally, histological analysis of Kl knockout mice brains revealed that Kl is required for AHN, particularly in the dorsal hippocampus. These data suggest that IF is superior to 10% CR in enhancing memory and identifies Kl as a novel candidate molecule that regulates the effects of IF on cognition likely via AHN enhancement.
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Affiliation(s)
- Gisele Pereira Dias
- grid.13097.3c0000 0001 2322 6764Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Tytus Murphy
- grid.13097.3c0000 0001 2322 6764Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Doris Stangl
- grid.13097.3c0000 0001 2322 6764Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Selda Ahmet
- grid.13097.3c0000 0001 2322 6764Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Benjamin Morisse
- grid.13097.3c0000 0001 2322 6764Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Alina Nix
- grid.13097.3c0000 0001 2322 6764Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Lindsey J. Aimone
- grid.250671.70000 0001 0662 7144Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA USA
| | - James B. Aimone
- grid.474520.00000000121519272Center for Computing Research, Sandia National Laboratories, Albuquerque, NM USA
| | - Makoto Kuro-O
- grid.410804.90000000123090000Division of Anti-Ageing Medicine, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Fred H. Gage
- grid.250671.70000 0001 0662 7144Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA USA
| | - Sandrine Thuret
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK. .,Department of Neurology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
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Cioffi F, Adam RHI, Broersen K. Molecular Mechanisms and Genetics of Oxidative Stress in Alzheimer's Disease. J Alzheimers Dis 2020; 72:981-1017. [PMID: 31744008 PMCID: PMC6971833 DOI: 10.3233/jad-190863] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Alzheimer’s disease is the most common neurodegenerative disorder that can cause dementia in elderly over 60 years of age. One of the disease hallmarks is oxidative stress which interconnects with other processes such as amyloid-β deposition, tau hyperphosphorylation, and tangle formation. This review discusses current thoughts on molecular mechanisms that may relate oxidative stress to Alzheimer’s disease and identifies genetic factors observed from in vitro, in vivo, and clinical studies that may be associated with Alzheimer’s disease-related oxidative stress.
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Affiliation(s)
- Federica Cioffi
- Nanobiophysics Group, Technical Medical Centre, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
| | - Rayan Hassan Ibrahim Adam
- Nanobiophysics Group, Technical Medical Centre, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
| | - Kerensa Broersen
- Applied Stem Cell Technologies, Technical Medical Centre, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
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11
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Ullah M, Sun Z. Klotho Deficiency Accelerates Stem Cells Aging by Impairing Telomerase Activity. J Gerontol A Biol Sci Med Sci 2020; 74:1396-1407. [PMID: 30452555 DOI: 10.1093/gerona/gly261] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Indexed: 01/01/2023] Open
Abstract
Understanding the effect of molecular pathways involved in the age-dependent deterioration of stem cell function is critical for developing new therapies. The overexpression of Klotho (KL), an antiaging protein, causes treated animal models to enjoy extended life spans. Now, the question stands: Does KL deficiency accelerate stem cell aging and telomere shortening? If so, what are the specific mechanisms by which it does this, and is cycloastragenol (CAG) treatment enough to restore telomerase activity in aged stem cells? We found that KL deficiency diminished telomerase activity by altering the expression of TERF1 and TERT, causing impaired differentiation potential, pluripotency, cellular senescence, and apoptosis in stem cells. Telomerase activity decreased with KL-siRNA knockdown. This suggests that both KL and telomeres regulate the stem cell aging process through telomerase subunits TERF1, POT1, and TERT using the TGFβ, Insulin, and Wnt signaling. These pathways can rejuvenate stem cell populations in a CD90-dependent mechanism. Stem cell dysfunctions were largely provoked by KL deficiency and telomere shortening, owing to altered expression of TERF1, TGFβ1, CD90, POT1, TERT, and basic fibroblast growth factor (bFGF). The CAG treatment partially rescued telomerase deterioration, suggesting that KL plays a critical role in life-extension by regulating telomere length and telomerase activity.
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Affiliation(s)
- Mujib Ullah
- Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Biomedical Research Center, Oklahoma City.,Interventional Regenerative Therapies lab, Department of Medicine, Stanford University, Palo Alto, California
| | - Zhongjie Sun
- Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Biomedical Research Center, Oklahoma City.,Department of Physiology, College of Medicine, University of Tennessee Health Science Center, Memphis
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Li D, Jing D, Liu Z, Chen Y, Huang F, Behnisch T. Enhanced Expression of Secreted α-Klotho in the Hippocampus Alters Nesting Behavior and Memory Formation in Mice. Front Cell Neurosci 2019; 13:133. [PMID: 31001090 PMCID: PMC6454015 DOI: 10.3389/fncel.2019.00133] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 03/18/2019] [Indexed: 12/30/2022] Open
Abstract
The klotho gene family consists of α-, β-, and γ-Klotho, which encode type I single-pass transmembrane proteins with large extracellular domains. α-Klotho exists as a full-length membrane-bound and as a soluble form after cleavage of the extracellular domain. Due to gene splicing, a short extracellular Klotho form can be expressed and secreted. Inactivation of α-Klotho leads to a phenotype that resembles accelerated aging, as the expression level of the α-Klotho protein in the hippocampal formation of mice decreases with age. Here, we show that intrahippocampal viral expression of secreted human α-Klotho alters social behavior and memory formation. Interestingly, overexpression of secreted human α-Klotho in the CA1 changed the nest-building behavior and improved object recognition, object location and passive avoidance memory. Moreover, α-Klotho overexpression increased hippocampal synaptic transmission in response to standardized stimulation strengths, altered paired-pulse facilitation of synaptic transmission, and enhanced activity-dependent synaptic plasticity. These results indicate that memory formation benefits from an augmented level of secreted α-Klotho.
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Affiliation(s)
- Dongxue Li
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, China
| | - Dongqing Jing
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, China
| | - Ziyang Liu
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, China
| | - Ying Chen
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, China
| | - Fang Huang
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, China
| | - Thomas Behnisch
- Institutes of Brain Science, State Key Laboratory of Medical Neurobiology and Collaborative Innovation Center for Brain Science, Fudan University, Shanghai, China
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Pathare G, Shalia K. Klotho: An emerging factor in neurodegenerative diseases. BIOMEDICAL RESEARCH JOURNAL 2019. [DOI: 10.4103/bmrj.bmrj_3_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Klotho at the Edge of Alzheimer’s Disease and Senile Depression. Mol Neurobiol 2018; 56:1908-1920. [DOI: 10.1007/s12035-018-1200-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 06/26/2018] [Indexed: 01/06/2023]
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