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Duarte-Silva S, Da Silva JD, Monteiro-Fernandes D, Costa MD, Neves-Carvalho A, Raposo M, Soares-Cunha C, Correia JS, Nogueira-Goncalves G, Fernandes HS, Oliveira S, Ferreira-Fernandes AR, Rodrigues F, Pereira-Sousa J, Vilasboas-Campos D, Guerreiro S, Campos J, Meireles-Costa L, Rodrigues CM, Cabantous S, Sousa SF, Lima M, Teixeira-Castro A, Maciel P. Glucocorticoid receptor-dependent therapeutic efficacy of tauroursodeoxycholic acid in preclinical models of spinocerebellar ataxia type 3. J Clin Invest 2024; 134:e162246. [PMID: 38227368 PMCID: PMC10904051 DOI: 10.1172/jci162246] [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: 05/31/2022] [Accepted: 01/09/2024] [Indexed: 01/17/2024] Open
Abstract
Spinocerebellar ataxia type 3 (SCA3) is an adult-onset neurodegenerative disease caused by a polyglutamine expansion in the ataxin-3 (ATXN3) gene. No effective treatment is available for this disorder, other than symptom-directed approaches. Bile acids have shown therapeutic efficacy in neurodegenerative disease models. Here, we pinpointed tauroursodeoxycholic acid (TUDCA) as an efficient therapeutic, improving the motor and neuropathological phenotype of SCA3 nematode and mouse models. Surprisingly, transcriptomic and functional in vivo data showed that TUDCA acts in neuronal tissue through the glucocorticoid receptor (GR), but independently of its canonical receptor, the farnesoid X receptor (FXR). TUDCA was predicted to bind to the GR, in a similar fashion to corticosteroid molecules. GR levels were decreased in disease-affected brain regions, likely due to increased protein degradation as a consequence of ATXN3 dysfunction being restored by TUDCA treatment. Analysis of a SCA3 clinical cohort showed intriguing correlations between the peripheral expression of GR and the predicted age at disease onset in presymptomatic subjects and FKBP5 expression with disease progression, suggesting this pathway as a potential source of biomarkers for future study. We have established a novel in vivo mechanism for the neuroprotective effects of TUDCA in SCA3 and propose this readily available drug for clinical trials in SCA3 patients.
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Affiliation(s)
- Sara Duarte-Silva
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Jorge Diogo Da Silva
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
- Medical Genetics Center Dr. Jacinto de Magalhães, Santo António University Hospital Center, Porto, Portugal
- Unit for Multidisciplinary Research in Biomedicine, Abel Salazar Biomedical Sciences Institute, Porto University, Porto, Portugal
| | - Daniela Monteiro-Fernandes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Marta Daniela Costa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Andreia Neves-Carvalho
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Mafalda Raposo
- Instituto de Biologia Molecular e Celular (IBMC), Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, Portugal
| | - Carina Soares-Cunha
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana S. Correia
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Gonçalo Nogueira-Goncalves
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Henrique S. Fernandes
- UCIBIO – Applied Molecular Biosciences Unit, BioSIM – Departamento de Biomedicina and
- Associate Laboratory i4HB – Institute for Health and Bioeconomy, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Stephanie Oliveira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Ana Rita Ferreira-Fernandes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Fernando Rodrigues
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana Pereira-Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Daniela Vilasboas-Campos
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Sara Guerreiro
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Jonas Campos
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Liliana Meireles-Costa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Cecilia M.P. Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Stephanie Cabantous
- Cancer Research Center of Toulouse (CRCT), Inserm, Université de Toulouse, UPS, CNRS, Toulouse, France
| | - Sergio F. Sousa
- UCIBIO – Applied Molecular Biosciences Unit, BioSIM – Departamento de Biomedicina and
- Associate Laboratory i4HB – Institute for Health and Bioeconomy, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Manuela Lima
- Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, Portugal
| | - Andreia Teixeira-Castro
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Patricia Maciel
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Braga/Guimarães, Portugal
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2
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Yao Z, Dong H, Zhu J, Du L, Luo Y, Liu Q, Liu S, Lin Y, Wang L, Wang S, Wei W, Zhang K, Huang Q, Yu X, Zhao W, Xu H, Qiu X, Pan Y, Huang X, Jim Yeung SC, Zhang D, Zhang H. Age-related decline in hippocampal tyrosine phosphatase PTPRO is a mechanistic factor in chemotherapy-related cognitive impairment. JCI Insight 2023; 8:e166306. [PMID: 37485875 PMCID: PMC10443805 DOI: 10.1172/jci.insight.166306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 05/31/2023] [Indexed: 07/25/2023] Open
Abstract
Chemotherapy-related cognitive impairment (CRCI) or "chemo brain" is a devastating neurotoxic sequela of cancer-related treatments, especially for the elderly individuals. Here we show that PTPRO, a tyrosine phosphatase, is highly enriched in the hippocampus, and its level is tightly associated with neurocognitive function but declined significantly during aging. To understand the protective role of PTPRO in CRCI, a mouse model was generated by treating Ptpro-/- female mice with doxorubicin (DOX) because Ptpro-/- female mice are more vulnerable to DOX, showing cognitive impairments and neurodegeneration. By analyzing PTPRO substrates that are neurocognition-associated tyrosine kinases, we found that SRC and EPHA4 are highly phosphorylated/activated in the hippocampi of Ptpro-/- female mice, with increased sensitivity to DOX-induced CRCI. On the other hand, restoration of PTPRO in the hippocampal CA3 region significantly ameliorate CRCI in Ptpro-/- female mice. In addition, we found that the plant alkaloid berberine (BBR) is capable of ameliorating CRCI in aged female mice by upregulating hippocampal PTPRO. Mechanistically, BBR upregulates PTPRO by downregulating miR-25-3p, which directly targeted PTPRO. These findings collectively demonstrate the protective role of hippocampal PTPRO against CRCI.
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Affiliation(s)
- Zhimeng Yao
- Department of Urology Surgery, and
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong, China
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Hongmei Dong
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Jianlin Zhu
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong, China
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Liang Du
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Yichen Luo
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Qing Liu
- Department of Pathology, The First People‘s Hospital of Foshan, Foshan, Guangdong, China
| | - Shixin Liu
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong, China
| | - Yusheng Lin
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
- Graduate School, Shantou University Medical College, Shantou, Guangdong, China
- Department of Hematology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Lu Wang
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Shuhong Wang
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Wei Wei
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People’s Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Keke Zhang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People’s Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | | | - Xiaojun Yu
- National Key Disciplines, Department of Forensic and Pathology, and
| | - Weijiang Zhao
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong, China
- Cell Biology Department, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, China
| | - Haiyun Xu
- Shantou University Mental Health Center
- The Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiaofu Qiu
- Department of Urology, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, China
| | - Yunlong Pan
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong, China
- Minister of Education Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou, Guangdong, China
| | - Xingxu Huang
- Gene Editing Center, School of Life Sciences and Technology, ShanghaiTech University, Shanghai, China
| | - Sai-Ching Jim Yeung
- Department of Emergency Medicine and Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Dianzheng Zhang
- Department of Biomedical Sciences, Philadelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania, USA
| | - Hao Zhang
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong, China
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, and Minister of Education Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou, Guangdong, China
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3
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Overnight Corticosterone and Gene Expression in Mouse Hippocampus: Time Course during Resting Period. Int J Mol Sci 2023; 24:ijms24032828. [PMID: 36769150 PMCID: PMC9917930 DOI: 10.3390/ijms24032828] [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: 12/22/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 02/05/2023] Open
Abstract
The aim of the experiment was to test the effect of an elevated level of glucocorticoids on the mouse hippocampal transcriptome after 12 h of treatment with corticosterone that was administered during an active phase of the circadian cycle. Additionally, we also tested the circadian changes in gene expression and the decay time of transcriptomic response to corticosterone. Gene expression was analyzed using microarrays. Obtained results show that transcriptomic responses to glucocorticoids are heterogeneous in terms of the decay time with some genes displaying persistent changes in expression during 9 h of rest. We have also found a considerable overlap between genes regulated by corticosterone and genes implicated previously in stress response. The examples of such genes are Acer2, Agt, Apod, Aqp4, Etnppl, Fabp7, Fam107a, Fjx1, Fmo2, Galnt15, Gjc2, Heph, Hes5, Htra1, Jdp2, Kif5a, Lfng, Lrg1, Mgp, Mt1, Pglyrp1, Pla2g3, Plin4, Pllp, Ptgds, Ptn, Slc2a1, Slco1c1, Sult1a1, Thbd and Txnip. This indicates that the applied model is a useful tool for the investigation of mechanisms underlying the stress response.
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Stress level of glucocorticoid exacerbates neuronal damage and Aβ production through activating NLRP1 inflammasome in primary cultured hippocampal neurons of APP-PS1 mice. Int Immunopharmacol 2022; 110:108972. [PMID: 35777263 DOI: 10.1016/j.intimp.2022.108972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/05/2022] [Accepted: 06/13/2022] [Indexed: 12/27/2022]
Abstract
Glucocorticoid (GC), secreted by adrenal cortex, plays important roles in regulating many physiological functions, while chronic stress level of GC exposure has many adverse effects on the structure and function of hippocampal neurons, and is closely implicated to the deterioration of Alzheimer's disease (AD). Oxidative stress and neuroinflammation play an important role in the occurrence and development of AD. However, it is still unclear whether chronic GC exposure promotes beta-amyloid (Aβ) accumulation and neuronal injury by increasing oxidative stress and neuroinflammation. In this study, we investigated the effects of chronic GC exposure on NOX2-NLRP1 inflammasome activation and the protective effects of NLRP1-siRNA against GC-induced neuronal injury in primary hippocampal neurons of APP/PS1 mice. The results showed that chronic dexamethasone (DEX, 1 µM) exposure 72 h had no significant effect on the primary hippocampal neurons of WT mice, but significantly increased Aβ1-42 accumulation (2.17 ± 0.19 fold in APP group and 3.06 ± 0.49 fold in APP + DEX group over WT group) and neuronal injury in primary hippocampal neurons of APP/PS1 mice. Meanwhile, chronic DEX exposure significantly increased the levels of reactive oxygen species (ROS) production and IL-1β, and significantly up-regulated the expressions of NOX2- and NLRP1-related proteins and mRNAs in primary hippocampal neurons of APP/PS1 mice but not in WT mice. Moreover, inhibition of NLRP1 by NLRP1-siRNA treatment also significantly alleviated neuronal injury and Aβ1-42 accumulation (1.96 ± 0.11 fold in APP + DEX group and 0.25 ± 0.01 fold in APP + NLRP1-siRNA + DEX group over APP group), and down-regulated the expressions of APP, BACE1, NCSTN and p-TAU/TAU in chronic DEX-induced hippocampal neurons of APP/PS1 mice. The results suggest that chronic GC exposure can accelerate neuronal damage and Aβ production by activating oxidative stress and NLRP1 inflammasome in primary hippocampal neurons of APP/PS1 mice, resulting in deterioration of AD.And inhibition of NLRP1 inflammasome may be an important strategy in improving chronic GC-induced neuronal injury.
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Amaya JM, Viho EMG, Sips HCM, Lalai RA, Sahut‐Barnola I, Dumontet T, Montanier N, Pereira AM, Martinez A, Meijer OC. Gene expression changes in the brain of a Cushing's syndrome mouse model. J Neuroendocrinol 2022; 34:e13125. [PMID: 35365898 PMCID: PMC9287025 DOI: 10.1111/jne.13125] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 01/31/2022] [Accepted: 02/21/2022] [Indexed: 12/21/2022]
Abstract
Excess glucocorticoid exposure affects emotional and cognitive brain functions. The extreme form, Cushing's syndrome, is adequately modelled in the AdKO2.0 mouse, consequential to adrenocortical hypertrophy and hypercorticosteronemia. We previously reported that the AdKO2.0 mouse brain undergoes volumetric changes that resemble closely those of Cushing's syndrome human patients, as well as changes in expression of glial related marker proteins. In the present work, the expression of genes related to glial and neuronal cell populations and functions was assessed in regions of the anterior brain, hippocampus, amygdala and hypothalamus. Glucocorticoid target genes were consistently regulated, including CRH mRNA suppression in the hypothalamus and induction in amygdala and hippocampus, even if glucocorticoid receptor protein was downregulated. Expression of glial genes was also affected in the AdKO2.0 mouse brain, indicating a different activation status in glial cells. Generic markers for neuronal cell populations, and cellular integrity were only slightly affected. Our findings highlight the vulnerability of glial cell populations to chronic high levels of circulating glucocorticoids.
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Affiliation(s)
- Jorge Miguel Amaya
- Department of Internal Medicine, Division of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
| | - Eva M. G. Viho
- Department of Internal Medicine, Division of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
| | - Hetty C. M. Sips
- Department of Internal Medicine, Division of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
| | - Reshma A. Lalai
- Department of Internal Medicine, Division of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
| | - Isabelle Sahut‐Barnola
- Génétique Reproduction et DéveloppementUniversité Clermont‐Auvergne, CNRS, INSERMClermont‐FerrandFrance
| | - Typhanie Dumontet
- Génétique Reproduction et DéveloppementUniversité Clermont‐Auvergne, CNRS, INSERMClermont‐FerrandFrance
| | - Nathanaëlle Montanier
- Génétique Reproduction et DéveloppementUniversité Clermont‐Auvergne, CNRS, INSERMClermont‐FerrandFrance
| | - Alberto M. Pereira
- Department of Internal Medicine, Division of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
| | - Antoine Martinez
- Génétique Reproduction et DéveloppementUniversité Clermont‐Auvergne, CNRS, INSERMClermont‐FerrandFrance
| | - Onno C. Meijer
- Department of Internal Medicine, Division of EndocrinologyLeiden University Medical CenterLeidenThe Netherlands
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6
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Milligan Armstrong A, Porter T, Quek H, White A, Haynes J, Jackaman C, Villemagne V, Munyard K, Laws SM, Verdile G, Groth D. Chronic stress and Alzheimer's disease: the interplay between the hypothalamic-pituitary-adrenal axis, genetics and microglia. Biol Rev Camb Philos Soc 2021; 96:2209-2228. [PMID: 34159699 DOI: 10.1111/brv.12750] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 12/21/2022]
Abstract
Chronic psychosocial stress is increasingly being recognised as a risk factor for sporadic Alzheimer's disease (AD). The hypothalamic-pituitary-adrenal axis (HPA axis) is the major stress response pathway in the body and tightly regulates the production of cortisol, a glucocorticoid hormone. Dysregulation of the HPA axis and increased levels of cortisol are commonly found in AD patients and make a major contribution to the disease process. The underlying mechanisms remain poorly understood. In addition, within the general population there are interindividual differences in sensitivities to glucocorticoid and stress responses, which are thought to be due to a combination of genetic and environmental factors. These differences could ultimately impact an individuals' risk of AD. The purpose of this review is first to summarise the literature describing environmental and genetic factors that can impact an individual's HPA axis reactivity and function and ultimately AD risk. Secondly, we propose a mechanism by which genetic factors that influence HPA axis reactivity may also impact inflammation, a key driver of neurodegeneration. We hypothesize that these factors can mediate glucocorticoid priming of the immune cells of the brain, microglia, to become pro-inflammatory and promote a neurotoxic environment resulting in neurodegeneration. Understanding the underlying molecular mechanisms and identifying these genetic factors has implications for evaluating stress-related risk/progression to neurodegeneration, informing the success of interventions based on stress management and potential risks associated with the common use of glucocorticoids.
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Affiliation(s)
- Ayeisha Milligan Armstrong
- Curtin Health Innovation Research Institute, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Curtin Medical School, Curtin University, Kent St, Bentley, WA, 6102, Australia
| | - Tenielle Porter
- Curtin Medical School, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Collaborative Genomics and Translation Group, School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
| | - Hazel Quek
- QIMR Berghofer Medical Institute, 300 Herston Rd, Herston, QLD, Australia
| | - Anthony White
- QIMR Berghofer Medical Institute, 300 Herston Rd, Herston, QLD, Australia
| | - John Haynes
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Connie Jackaman
- Curtin Health Innovation Research Institute, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Curtin Medical School, Curtin University, Kent St, Bentley, WA, 6102, Australia
| | - Victor Villemagne
- School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia.,The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, 30 Royal Parade, Parkville, VIC, 3052, Australia
| | - Kylie Munyard
- Curtin Health Innovation Research Institute, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Curtin Medical School, Curtin University, Kent St, Bentley, WA, 6102, Australia
| | - Simon M Laws
- Curtin Medical School, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Collaborative Genomics and Translation Group, School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
| | - Giuseppe Verdile
- Curtin Health Innovation Research Institute, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Curtin Medical School, Curtin University, Kent St, Bentley, WA, 6102, Australia.,School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
| | - David Groth
- Curtin Health Innovation Research Institute, Curtin University, Kent St, Bentley, WA, 6102, Australia.,Curtin Medical School, Curtin University, Kent St, Bentley, WA, 6102, Australia
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7
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Parikh P, Wicher S, Khandalavala K, Pabelick CM, Britt RD, Prakash YS. Cellular senescence in the lung across the age spectrum. Am J Physiol Lung Cell Mol Physiol 2019; 316:L826-L842. [PMID: 30785345 PMCID: PMC6589594 DOI: 10.1152/ajplung.00424.2018] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 02/14/2019] [Accepted: 02/14/2019] [Indexed: 12/18/2022] Open
Abstract
Cellular senescence results in cell cycle arrest with secretion of cytokines, chemokines, growth factors, and remodeling proteins (senescence-associated secretory phenotype; SASP) that have autocrine and paracrine effects on the tissue microenvironment. SASP can promote remodeling, inflammation, infectious susceptibility, angiogenesis, and proliferation, while hindering tissue repair and regeneration. While the role of senescence and the contributions of senescent cells are increasingly recognized in the context of aging and a variety of disease states, relatively less is known regarding the portfolio and influences of senescent cells in normal lung growth and aging per se or in the induction or progression of lung diseases across the age spectrum such as bronchopulmonary dysplasia, asthma, chronic obstructive pulmonary disease, or pulmonary fibrosis. In this review, we introduce concepts of cellular senescence, the mechanisms involved in the induction of senescence, and the SASP portfolio that are relevant to lung cells, presenting the potential contribution of senescent cells and SASP to inflammation, hypercontractility, and remodeling/fibrosis: aspects critical to a range of lung diseases. The potential to blunt lung disease by targeting senescent cells using a novel class of drugs (senolytics) is discussed. Potential areas for future research on cellular senescence in the lung are identified.
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Affiliation(s)
- Pavan Parikh
- Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Mayo Clinic, Rochester, Minnesota
| | - Sarah Wicher
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
| | - Karl Khandalavala
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
| | - Christina M. Pabelick
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
| | - Rodney D. Britt
- Center for Perinatal Research, The Research Institute at Nationwide Children’s Hospital, Columbus, Ohio
- Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Y. S. Prakash
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
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8
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Ruiz R, Roque A, Pineda E, Licona-Limón P, José Valdéz-Alarcón J, Lajud N. Early life stress accelerates age-induced effects on neurogenesis, depression, and metabolic risk. Psychoneuroendocrinology 2018; 96:203-211. [PMID: 30048914 DOI: 10.1016/j.psyneuen.2018.07.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 06/15/2018] [Accepted: 07/07/2018] [Indexed: 01/06/2023]
Abstract
Early life stress (ELS) affects hippocampal neurogenesis, increases depressive-like behavior, and causes mild metabolic imbalance in early adulthood (2 months). However, whether these effects worsen in mid life remains unclear. To test whether age-dependent effects of ELS on hippocampal neurogenesis are related to deficient hypothalamic-pituitary-adrenal (HPA) axis feedback that causes increased comorbidity of depression and metabolic risk, we evaluated the effects of periodic maternal separation (MS180) in young (4-months-old) and middle-aged (10-months-old) adult rats. MS180 caused more severe depressive-like behavior in middle-aged adults than in young animals. There were no behavioral phenotypic differences between young MS180 and control middle-aged groups. MS180 similarly affected glucose tolerance, increased fasting corticosterone, insulin, and the quantitative insulin sensitivity check index (QUICKI) at both ages. However, middle-aged adult MS180 rats showed more severe age-induced obesity (>40% BW) than controls (>22% BW). MS180 differentially affected dorsal and ventral neurogenesis. In young adults, MS180 animals only showed a decrease in dorsal hippocampal neurogenesis as compared to their age-matched counterparts. In contrast, at 10 months of age, MS180 caused a similar decrease in both dorsal and ventral hippocampal neurogenesis as compared to age-matched controls, and a more severe decrease as compared to young animals. Taken together, our data indicate that MS180 animals show an early onset of age-induced alterations on depression and metabolic risk, and these effects relate to alterations in hippocampal neurogenesis.
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Affiliation(s)
- Roberto Ruiz
- División de Neurociencias, Centro de Investigación Biomédica de Michoacán-Instituto Mexicano del Seguro Social, Morelia, Michoacán, Mexico; Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Angélica Roque
- División de Neurociencias, Centro de Investigación Biomédica de Michoacán-Instituto Mexicano del Seguro Social, Morelia, Michoacán, Mexico
| | - Edel Pineda
- División de Neurociencias, Centro de Investigación Biomédica de Michoacán-Instituto Mexicano del Seguro Social, Morelia, Michoacán, Mexico
| | - Paula Licona-Limón
- Centro Multidisciplinario de Estudios en Biotecnología, Facultad de Medicina Veterinaria y Zootecnia - Benemérita y Centenaria Universidad Michoacana de San Nicolás de Hidalgo, Mexico
| | - Juan José Valdéz-Alarcón
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Naima Lajud
- División de Neurociencias, Centro de Investigación Biomédica de Michoacán-Instituto Mexicano del Seguro Social, Morelia, Michoacán, Mexico.
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9
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Hargis K, Buechel HM, Popovic J, Blalock EM. Acute psychosocial stress in mid-aged male rats causes hyperthermia, cognitive decline, and increased deep sleep power, but does not alter deep sleep duration. Neurobiol Aging 2018; 70:78-85. [PMID: 30007167 PMCID: PMC6119089 DOI: 10.1016/j.neurobiolaging.2018.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 05/08/2018] [Accepted: 06/05/2018] [Indexed: 10/14/2022]
Abstract
Aging is associated with altered sleep architecture and worsened hippocampus-dependent cognition, highly prevalent clinical conditions that detract from quality of life for the elderly. Interestingly, exposure to psychosocial stress causes similar responses in young subjects, suggesting that age itself may act as a stressor. In prior work, we demonstrated that young animals show loss of deep sleep, deficits in cognition, and elevated body temperature after acute stress exposure, whereas aged animals are hyporesponsive on these measures. However, it is unclear if these age-altered stress responses occur in parallel over the course of aging. To address this, here we repeated the experiment in mid-aged animals. We hypothesized that mid-aged stress responses would be intermediate between those of young and aged subjects. Sixteen mid-aged (12 months) male F344 rats were implanted with EEG/EMG emitters to monitor sleep architecture and body temperature, and were trained on the Morris water maze for 3 days. On the fourth day, half of the subjects were restrained for 3 hours immediately before the water maze probe trial. Sleep architecture and body temperature were measured during the ensuing inactive period, and on the following day, endpoint measures were taken. Restrained mid-aged animals showed resistance to deep sleep loss, but demonstrated stress-induced water maze probe trial performance deficits as well as postrestraint hyperthermia. Taken in the context of prior work, these data suggest that age-related loss of sleep architecture stress sensitivity may precede both cognitive and body temperature-related stress insensitivity.
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Affiliation(s)
- Kendra Hargis
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Heather M Buechel
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Jelena Popovic
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Eric M Blalock
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, KY, USA.
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10
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Wickramasekara RN, Morrill S, Farhat Y, Smith SJ, Yilmazer-Hanke D. Glutathione and Inter-α-trypsin inhibitor heavy chain 3 (Itih3) mRNA levels in nicotine-treated Cd44 knockout mice. Toxicol Rep 2018; 5:759-764. [PMID: 29984189 PMCID: PMC6031235 DOI: 10.1016/j.toxrep.2018.06.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 06/07/2018] [Accepted: 06/16/2018] [Indexed: 11/18/2022] Open
Abstract
Chronic nicotine use that replaces tobacco smoking weakens antioxidant defense. Depletion of glutathione by chronic nicotine delivery may compromise liver health. Inter-α-trypsin Inhibitor Heavy Chain 3 (Itih3) mRNA correlates with glutathione. Nicotine and sex interact with Cd44 signaling in regulation of liver glutathione.
Cluster of differentiation 44 (Cd44), a hyaluronan receptor, and the secreted hyaluronan-binding protein Inter-α-trypsin Inhibitor Heavy chain 3 (Itih3) play an important role in cancer and oxidative stress. Smoking of tobacco reduces Itih3 in the plasma and activates hyaluronan signaling through Cd44, but the impact of Cd44 on Itih3 expression is unknown. Here, we studied changes induced by the tobacco component nicotine on the glutathione (GSH) antioxidant system and Itih3 gene expression in Cd44 knockout mice. Cd44 deficiency decreased baseline total GSH and oxidized glutathione (GSSG) levels in the liver compared to wildtype mice. However, contrary to wildtype mice, chronic oral nicotine administration (200 μg/ml) failed to further reduce total GSH and GSSG in Cd44 mice. Sex differences with lowered glutathione levels in females was also detectable only in wildtype but not Cd44 knockout mice. Itih3 mRNA levels in the liver and hypothalamus were not affected by nicotine, Cd44 genotype or sex. Nonetheless, the correlation between Itih3 and total GSH levels in the liver (r = 0.42, p < 0.05) suggested a role of Itih3 in glutathione metabolism in WT mice. Again this effect was diminished in Cd44 knockout mice. The disappearance of nicotine effects, sex differences and correlations between Itih3 and total GSH in Cd44 knockout mice compared to wildtype animals suggests an interaction between nicotine, Cd44 and/or sex-dependent signaling in the regulation of glutathione metabolism.
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Affiliation(s)
| | - Seth Morrill
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska, USA
| | - Yasmine Farhat
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska, USA
| | - Sarah J Smith
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska, USA
| | - Deniz Yilmazer-Hanke
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska, USA.,Center for Biomedical Research, School of Medicine, Ulm University, Germany
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11
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KV A, Madhana RM, JS IC, Lahkar M, Sinha S, Naidu V. Antidepressant activity of vorinostat is associated with amelioration of oxidative stress and inflammation in a corticosterone-induced chronic stress model in mice. Behav Brain Res 2018; 344:73-84. [DOI: 10.1016/j.bbr.2018.02.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 02/04/2018] [Accepted: 02/07/2018] [Indexed: 12/11/2022]
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12
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Juszczak GR, Stankiewicz AM. Glucocorticoids, genes and brain function. Prog Neuropsychopharmacol Biol Psychiatry 2018; 82:136-168. [PMID: 29180230 DOI: 10.1016/j.pnpbp.2017.11.020] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 10/18/2017] [Accepted: 11/23/2017] [Indexed: 01/02/2023]
Abstract
The identification of key genes in transcriptomic data constitutes a huge challenge. Our review of microarray reports revealed 88 genes whose transcription is consistently regulated by glucocorticoids (GCs), such as cortisol, corticosterone and dexamethasone, in the brain. Replicable transcriptomic data were combined with biochemical and physiological data to create an integrated view of the effects induced by GCs. The most frequently reported genes were Errfi1 and Ddit4. Their up-regulation was associated with the altered transcription of genes regulating growth factor and mTORC1 signaling (Gab1, Tsc22d3, Dusp1, Ndrg2, Ppp5c and Sesn1) and progression of the cell cycle (Ccnd1, Cdkn1a and Cables1). The GC-induced reprogramming of cell function involves changes in the mRNA level of genes responsible for the regulation of transcription (Klf9, Bcl6, Klf15, Tle3, Cxxc5, Litaf, Tle4, Jun, Sox4, Sox2, Sox9, Irf1, Sall2, Nfkbia and Id1) and the selective degradation of mRNA (Tob2). Other genes are involved in the regulation of metabolism (Gpd1, Aldoc and Pdk4), actin cytoskeleton (Myh2, Nedd9, Mical2, Rhou, Arl4d, Osbpl3, Arhgef3, Sdc4, Rdx, Wipf3, Chst1 and Hepacam), autophagy (Eva1a and Plekhf1), vesicular transport (Rhob, Ehd3, Vps37b and Scamp2), gap junctions (Gjb6), immune response (Tiparp, Mertk, Lyve1 and Il6r), signaling mediated by thyroid hormones (Thra and Sult1a1), calcium (Calm2), adrenaline/noradrenaline (Adcy9 and Adra1d), neuropeptide Y (Npy1r) and histamine (Hdc). GCs also affected genes involved in the synthesis of polyamines (Azin1) and taurine (Cdo1). The actions of GCs are restrained by feedback mechanisms depending on the transcription of Sgk1, Fkbp5 and Nr3c1. A side effect induced by GCs is increased production of reactive oxygen species. Available data show that the brain's response to GCs is part of an emergency mode characterized by inactivation of non-core activities, restrained inflammation, restriction of investments (growth), improved efficiency of energy production and the removal of unnecessary or malfunctioning cellular components to conserve energy and maintain nutrient supply during the stress response.
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Affiliation(s)
- Grzegorz R Juszczak
- Department of Animal Behavior, Institute of Genetics and Animal Breeding, Jastrzebiec, ul. Postepu 36A, 05-552 Magdalenka, Poland.
| | - Adrian M Stankiewicz
- Department of Molecular Biology, Institute of Genetics and Animal Breeding, Jastrzebiec, ul. Postepu 36A, 05-552 Magdalenka, Poland
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FK506-Binding Protein 12.6/1b, a Negative Regulator of [Ca 2+], Rescues Memory and Restores Genomic Regulation in the Hippocampus of Aging Rats. J Neurosci 2017; 38:1030-1041. [PMID: 29255009 PMCID: PMC5783960 DOI: 10.1523/jneurosci.2234-17.2017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 10/10/2017] [Accepted: 11/24/2017] [Indexed: 12/20/2022] Open
Abstract
Hippocampal overexpression of FK506-binding protein 12.6/1b (FKBP1b), a negative regulator of ryanodine receptor Ca2+ release, reverses aging-induced memory impairment and neuronal Ca2+ dysregulation. Here, we tested the hypothesis that FKBP1b also can protect downstream transcriptional networks from aging-induced dysregulation. We gave hippocampal microinjections of FKBP1b-expressing viral vector to male rats at either 13 months of age (long-term, LT) or 19 months of age (short-term, ST) and tested memory performance in the Morris water maze at 21 months of age. Aged rats treated ST or LT with FKBP1b substantially outperformed age-matched vector controls and performed similarly to each other and young controls (YCs). Transcriptional profiling in the same animals identified 2342 genes with hippocampal expression that was upregulated/downregulated in aged controls (ACs) compared with YCs (the aging effect). Of these aging-dependent genes, 876 (37%) also showed altered expression in aged FKBP1b-treated rats compared with ACs, with FKBP1b restoring expression of essentially all such genes (872/876, 99.5%) in the direction opposite the aging effect and closer to levels in YCs. This inverse relationship between the aging and FKBP1b effects suggests that the aging effects arise from FKBP1b deficiency. Functional category analysis revealed that genes downregulated with aging and restored by FKBP1b were associated predominantly with diverse brain structure categories, including cytoskeleton, membrane channels, and extracellular region. Conversely, genes upregulated with aging but not restored by FKBP1b associated primarily with glial–neuroinflammatory, ribosomal, and lysosomal categories. Immunohistochemistry confirmed aging-induced rarefaction and FKBP1b-mediated restoration of neuronal microtubular structure. Therefore, a previously unrecognized genomic network modulating diverse brain structural processes is dysregulated by aging and restored by FKBP1b overexpression. SIGNIFICANCE STATEMENT Previously, we found that hippocampal overexpression of FK506-binding protein 12.6/1b (FKBP1b), a negative regulator of intracellular Ca2+ responses, reverses both aging-related Ca2+ dysregulation and cognitive impairment. Here, we tested whether hippocampal FKBP1b overexpression also counteracts aging changes in gene transcriptional networks. In addition to reducing memory deficits in aged rats, FKBP1b selectively counteracted aging-induced expression changes in 37% of aging-dependent genes, with cytoskeletal and extracellular structure categories highly associated with the FKBP1b-rescued genes. Our results indicate that, in parallel with cognitive processes, a novel transcriptional network coordinating brain structural organization is dysregulated with aging and restored by FKBP1b.
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Zhang Y, Hu W, Zhang B, Yin Y, Zhang J, Huang D, Huang R, Li W, Li W. Ginsenoside Rg1 protects against neuronal degeneration induced by chronic dexamethasone treatment by inhibiting NLRP-1 inflammasomes in mice. Int J Mol Med 2017; 40:1134-1142. [PMID: 28849171 PMCID: PMC5593467 DOI: 10.3892/ijmm.2017.3092] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 07/28/2017] [Indexed: 02/06/2023] Open
Abstract
Glucocorticoids (GCs) are known to alter neuronal plasticity, impair learning and memory and play important roles in the generation and progression of Alzheimer's disease. There are no effective drug options for preventing neuronal injury induced by chronic GC exposure. Ginsenoside Rg1 (Rg1) is a steroidal saponin found in ginseng. The present study investigated the neuroprotective effect of Rg1 on neuroinflammation damage induced by chronic dexamethasone (5 mg/kg for 28 days) exposure in male mice. Our results showed that Rg1 (2 and 4 mg/kg) treatment increased spontaneous motor activity and exploratory behavior in an open field test, and increased the number of entries into the new object zone in a novel object recognition test. Moreover, Rg1 (2 and 4 mg/kg) treatment significantly alleviated neuronal degeneration and increased MAP2 expression in the frontal cortex and hippocampus. Additionally, inhibition of NLRP-1 inflammasomes was also involved in the mechanisms underlying the effect of Rg1 on GC-induced neuronal injury. We found that Rg1 (2 and 4 mg/kg) treatment increased the expression of glucocorticosteroid receptor and decreased the expression of NLRP-1, ASC, caspase-1, caspase-5, IL-1β and IL-18 in the hippocampus in male mice. The present study indicates that Rg1 may have protective effects on neuroinflammation and neuronal injury induced by chronic GC exposure.
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Affiliation(s)
- Yaodong Zhang
- Department of Pharmacology, Key Laboratory of Anti‑Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Wen Hu
- Department of Pharmacology, Key Laboratory of Anti‑Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Biqiong Zhang
- Department of Pharmacology, Key Laboratory of Anti‑Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yanyan Yin
- Department of Pharmacology, Key Laboratory of Anti‑Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Junyan Zhang
- Department of Pharmacology, Key Laboratory of Anti‑Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Dake Huang
- Synthetic Laboratory of Basic Medicine College, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Rongrong Huang
- Department of Pharmacology, Anhui Xinhua University, Hefei, Anhui 230088, P.R. China
| | - Weiping Li
- Department of Pharmacology, Key Laboratory of Anti‑Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Weizu Li
- Department of Pharmacology, Key Laboratory of Anti‑Inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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15
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Zhang B, Zhang Y, Wu W, Xu T, Yin Y, Zhang J, Huang D, Li W. Chronic glucocorticoid exposure activates BK-NLRP1 signal involving in hippocampal neuron damage. J Neuroinflammation 2017; 14:139. [PMID: 28732502 PMCID: PMC5521122 DOI: 10.1186/s12974-017-0911-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 07/07/2017] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Neuroinflammation mediated by NLRP1 (nucleotide-binding oligomerization domain (NOD)-like receptor protein 1) inflammasome plays an important role in many neurological diseases such as Parkinson's disease (PD) and Alzheimer's disease (AD). Our previous studies showed that chronic glucocorticoid (GC) exposure increased brain inflammation via NLRP1 inflammasome and induce neurodegeneration. However, little is known about the mechanism of chronic GC exposure on NLRP1 inflammasome activation in hippocampal neurons. METHODS Hippocampal neurons damage was assessed by LDH kit and Hoechst 33258 staining. The expression of microtubule-associated protein 2 (MAP2), inflammasome complex protein (NLRP1, ASC and caspase-1), inflammatory cytokines (IL-1β), and large-conductance Ca2+ and voltage-activated K+ channel (BK channels) protein was detected by Western blot. The inflammatory cytokines (IL-1β and IL-18) were examined by ELISA kit. The mRNA levels of NLRP1, IL-1β, and BK were detected by real-time PCR. BK channel currents were recorded by whole-cell patch-clamp technology. Measurement of [K+]i was performed by ion-selective electrode (ISE) technology. RESULTS Chronic dexamethasone (DEX) treatment significantly increased LDH release and neuronal apoptosis and decreased expression of MAP2. The mechanistic studies revealed that chronic DEX exposure significantly increased the expression of NLRP1, ASC, caspase-1, IL-1β, L-18, and BK protein and NLRP1, IL-1β and BK mRNA levels in hippocampal neurons. Further studies showed that DEX exposure results in the increase of BK channel currents, with the subsequent K+ efflux and a low concentration of intracellular K+, which involved in activation of NLRP1 inflammasome. Moreover, these effects of chronic DEX exposure could be blocked by specific BK channel inhibitor iberiotoxin (IbTx). CONCLUSION Our findings suggest that chronic GC exposure may increase neuroinflammation via activation of BK-NLRP1 signal pathway and promote hippocampal neurons damage, which may be involved in the development and progression of AD.
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Affiliation(s)
- Biqiong Zhang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Yaodong Zhang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Wenning Wu
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Tanzhen Xu
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Yanyan Yin
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Junyan Zhang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Dake Huang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China
| | - Weizu Li
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, 230032, China.
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16
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Zhang B, Zhang Y, Xu T, Yin Y, Huang R, Wang Y, Zhang J, Huang D, Li W. Chronic dexamethasone treatment results in hippocampal neurons injury due to activate NLRP1 inflammasome in vitro. Int Immunopharmacol 2017; 49:222-230. [PMID: 28605710 DOI: 10.1016/j.intimp.2017.05.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 05/01/2017] [Accepted: 05/22/2017] [Indexed: 11/30/2022]
Abstract
Neuroinflammation mediated by NLRP-1 inflammasome plays an important role in the pathogenesis of neurodegeneration diseases such as Alzheimer's disease (AD). Chronic glucocorticoids (GCs) exposure has deleterious effect on the structure and function of neurons and was found to be correlated with development and progression of AD. We hypothesize that chronic glucocorticoids may down-regulate the expression of glucocorticoids receptor (GR) and activate NLRP-1 inflammasome in hippocampal neurons, which may promote neuroinflammation and induce neuronal injury. The present results showed that chronic DEX exposure significantly increased LDH release and apoptosis, decreased MAP2 and GR expression in hippocampal neurons. DEX (5μΜ) exposure for 3d significantly increased the expression of NLRP-1, ASC, caspase-1 and IL-1β in the hippocampal neurons and the release of IL-1β and IL-18 in the supernatants. Moreover, DEX (1, 5μΜ) treatment for 3d significantly increased the expression of NF-κB in hippocampal neurons. The GR antagonist, mifepristone (RU486), had protective effects on chronic DEX induced hippocampal neurons injury and NLRP1 inflammasome activation. The results suggest that chronic GCs exposure can decrease GR expression and increase neuroinflammation via NLRP1 inflammasome and promote hippocampal neurons degeneration, which may play an important role in the progression and development of AD.
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Affiliation(s)
- Biqiong Zhang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China
| | - Yaodong Zhang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China
| | - Tanzhen Xu
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China
| | - Yanyan Yin
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China
| | - Rongrong Huang
- Department of Pharmacology, Anhui Xinhua University, Hefei 230088, China
| | - Yuchan Wang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China
| | - Junyan Zhang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China
| | - Dake Huang
- Synthetic Laboratory of Basic Medicine College, Anhui Medical University, Hefei 230032, China
| | - Weizu Li
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, China.
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17
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Seifuddin F, Wand G, Cox O, Pirooznia M, Moody L, Yang X, Tai J, Boersma G, Tamashiro K, Zandi P, Lee R. Genome-wide Methyl-Seq analysis of blood-brain targets of glucocorticoid exposure. Epigenetics 2017; 12:637-652. [PMID: 28557603 DOI: 10.1080/15592294.2017.1334025] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Chronic exposure to glucocorticoids (GCs) can lead to psychiatric complications through epigenetic mechanisms such as DNA methylation (DNAm). We sought to determine whether epigenetic changes in a peripheral tissue can serve as a surrogate for those in a relatively inaccessible tissue such as the brain. DNA extracted from the hippocampus and blood of mice treated with GCs or vehicle solution was assayed using a genome-wide DNAm platform (Methyl-Seq) to identify differentially methylated regions (DMRs) induced by GC treatment. We observed that ∼70% of the DMRs in both tissues lost methylation following GC treatment. Of the 3,095 DMRs that mapped to the same genes in both tissues, 1,853 DMRs underwent DNAm changes in the same direction. Interestingly, only 209 DMRs (<7%) overlapped in genomic coordinates between the 2 tissues, suggesting tissue-specific differences in GC-targeted loci. Pathway analysis showed that the DMR-associated genes were members of pathways involved in metabolism, immune function, and neurodevelopment. Also, changes in cell type composition of blood and brain were examined by fluorescence-activated cell sorting. Separation of the cortex into neuronal and non-neuronal fractions and the leukocytes into T-cells, B-cells, and neutrophils showed that GC-induced methylation changes primarily occurred in neurons and T-cells, with the blood tissue also undergoing a shift in the proportion of constituent cell types while the proportion of neurons and glia in the brain remained stable. From the current pilot study, we found that despite tissue-specific epigenetic changes and cellular heterogeneity, blood can serve as a surrogate for GC-induced changes in the brain.
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Affiliation(s)
- Fayaz Seifuddin
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Gary Wand
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA.,b Department of Medicine, Division of Endocrinology , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Olivia Cox
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Mehdi Pirooznia
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Laura Moody
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Xiaoju Yang
- b Department of Medicine, Division of Endocrinology , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Jonathan Tai
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Gretha Boersma
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Kellie Tamashiro
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Peter Zandi
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
| | - Richard Lee
- a Mood Disorders Center, Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD, USA
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Bettio LEB, Rajendran L, Gil-Mohapel J. The effects of aging in the hippocampus and cognitive decline. Neurosci Biobehav Rev 2017; 79:66-86. [PMID: 28476525 DOI: 10.1016/j.neubiorev.2017.04.030] [Citation(s) in RCA: 325] [Impact Index Per Article: 46.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 03/15/2017] [Accepted: 04/10/2017] [Indexed: 02/06/2023]
Abstract
Aging is a natural process that is associated with cognitive decline as well as functional and social impairments. One structure of particular interest when considering aging and cognitive decline is the hippocampus, a brain region known to play an important role in learning and memory consolidation as well as in affective behaviours and mood regulation, and where both functional and structural plasticity (e.g., neurogenesis) occur well into adulthood. Neurobiological alterations seen in the aging hippocampus including increased oxidative stress and neuroinflammation, altered intracellular signalling and gene expression, as well as reduced neurogenesis and synaptic plasticity, are thought to be associated with age-related cognitive decline. Non-invasive strategies such as caloric restriction, physical exercise, and environmental enrichment have been shown to counteract many of the age-induced alterations in hippocampal signalling, structure, and function. Thus, such approaches may have therapeutic value in counteracting the deleterious effects of aging and protecting the brain against age-associated neurodegenerative processes.
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Affiliation(s)
- Luis E B Bettio
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Luckshi Rajendran
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Joana Gil-Mohapel
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada; UBC Island Medical program, University of Victoria, Victoria, BC, Canada.
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Hu W, Zhang Y, Wu W, Yin Y, Huang D, Wang Y, Li W, Li W. Chronic glucocorticoids exposure enhances neurodegeneration in the frontal cortex and hippocampus via NLRP-1 inflammasome activation in male mice. Brain Behav Immun 2016; 52:58-70. [PMID: 26434621 DOI: 10.1016/j.bbi.2015.09.019] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 09/09/2015] [Accepted: 09/30/2015] [Indexed: 12/18/2022] Open
Abstract
Neuroinflammation plays an important role in the pathogenesis of neurodegenerative diseases, such as Alzheimer's disease (AD) and depression. Chronic glucocorticoids (GCs) exposure has deleterious effects on the structure and function of neurons and is associated with development and progression of AD. However, little is known about the proinflammatory effects of chronic GCs exposure on neurodegeneration in brain. Therefore, the aim of this study was to evaluate the effects of chronic dexamethasone (DEX) treatment (5mg/kg, s.c. for 7, 14, 21 and 28 days) on behavior, neurodegeneration and neuroinflammatory parameters of nucleotide-binding oligomerization domain-like receptor pyrin domain-containing 1 (NLRP-1) inflammasome in male mice. The results showed that DEX treatment for 21 and 28 days significantly reduced the spontaneous motor activity and exploratory behavior of the mice. In addition, these mice showed significant neurodegeneration and a decrease of microtubule-associated protein 2 (MAP2) in the frontal cortex and hippocampus CA3. DEX treatment for 7, 14, 21 and 28 days significantly decreased the mRNA and protein expression of glucocorticoid receptor (GR). Moreover, DEX treatment for 21 and 28 days significantly increased the proteins expression of NLRP-1, Caspase-1, Caspase-5, apoptosis associated speck-like protein (ASC), nuclear factor-κB (NF-κB), p-NF-κB, interleukin-1β (IL-1β), IL-18 and IL-6 in the frontal cortex and hippocampus brain tissue. DEX treatment for 28 days also significantly increased the mRNA expression levels of NLRP-1, Caspase-1, ASC and IL-1β. These results suggest that chronic GCs exposure may increase brain inflammation via NLRP-1 inflammasome activation and induce neurodegeneration.
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Affiliation(s)
- Wen Hu
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, PR China
| | - Yaodong Zhang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, PR China
| | - Wenning Wu
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, PR China
| | - Yanyan Yin
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, PR China
| | - Dake Huang
- Synthetic Laboratory of Basic Medicine College, Anhui Medical University, Hefei 230032, PR China
| | - Yuchan Wang
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, PR China
| | - Weiping Li
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, PR China
| | - Weizu Li
- Department of Pharmacology, Key Laboratory of Anti-inflammatory and Immunopharmacology, Ministry of Education, Anhui Medical University, Hefei 230032, PR China.
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Qiu J, Dunbar DR, Noble J, Cairns C, Carter R, Kelly V, Chapman KE, Seckl JR, Yau JLW. Decreased Npas4 and Arc mRNA Levels in the Hippocampus of Aged Memory-Impaired Wild-Type But Not Memory Preserved 11β-HSD1 Deficient Mice. J Neuroendocrinol 2016; 28. [PMID: 26563879 PMCID: PMC4737280 DOI: 10.1111/jne.12339] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 10/18/2015] [Accepted: 11/08/2015] [Indexed: 01/06/2023]
Abstract
Mice deficient in the glucocorticoid-regenerating enzyme 11β-HSD1 resist age-related spatial memory impairment. To investigate the mechanisms and pathways involved, we used microarrays to identify differentially expressed hippocampal genes that associate with cognitive ageing and 11β-HSD1. Aged wild-type mice were separated into memory-impaired and unimpaired relative to young controls according to their performance in the Y-maze. All individual aged 11β-HSD1-deficient mice showed intact spatial memory. The majority of differentially expressed hippocampal genes were increased with ageing (e.g. immune/inflammatory response genes) with no genotype differences. However, the neuronal-specific transcription factor, Npas4, and immediate early gene, Arc, were reduced (relative to young) in the hippocampus of memory-impaired but not unimpaired aged wild-type or aged 11β-HSD1-deficient mice. A quantitative reverse transcriptase-polymerase chain reaction and in situ hybridisation confirmed reduced Npas4 and Arc mRNA expression in memory-impaired aged wild-type mice. These findings suggest that 11β-HSD1 may contribute to the decline in Npas4 and Arc mRNA levels associated with memory impairment during ageing, and that decreased activity of synaptic plasticity pathways involving Npas4 and Arc may, in part, underlie the memory deficits seen in cognitively-impaired aged wild-type mice.
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Affiliation(s)
- J Qiu
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - D R Dunbar
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - J Noble
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - C Cairns
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - R Carter
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - V Kelly
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - K E Chapman
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
| | - J R Seckl
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
| | - J L W Yau
- BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
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21
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Flowers A, Lee JY, Acosta S, Hudson C, Small B, Sanberg CD, Bickford PC. NT-020 treatment reduces inflammation and augments Nrf-2 and Wnt signaling in aged rats. J Neuroinflammation 2015; 12:174. [PMID: 26376629 PMCID: PMC4574066 DOI: 10.1186/s12974-015-0395-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 09/09/2015] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Aging is associated with a decline in stem cell proliferation that is thought to be a result of dysregulated signaling in the neurogenic niche. This results in a diminished and less efficient pool of progenitors. The Wnt pathway plays a key role in the proliferation and differentiation of progenitor cells. Recent publications suggest that the age-related decline in the function of Wnt is a contributor to age-dependent decline in neural progenitors. Similarly, the aged neurogenic niche is characterized by higher levels of inflammatory cytokines. This increased inflammation contributes to the declining function of neural progenitor cells. NT-020, a proprietary blend of polyphenols, has been shown to increase proliferation of neural progenitors and improve cognitive function in aged rats. PURPOSE AND METHODS In this study, we examined the neurogenic niche in the subgranular zone of the dentate gyrus (SGZ) and the subventricular zone (SVZ) of young and aged rats to determine if dietary supplementation with NT-020 could regulate inflammation and oxidative stress response pathways in neurons, astrocytes, and microglia. Further, we examined NT-020's ability to modulate Wnt signaling in the aged neurogenic niche. To accomplish this, we utilized gene PCR arrays and immunohistochemistry. RESULTS We observed an increase in nuclear localization of immunopositive labeling of β-catenin, HO-1, and Nrf2 in all subsets of cell types in both young and aged rats in the SGZ and SVZ following NT-020 treatment. NeuN-positive cells showed a basal increase in nuclear β-catenin in the aged rats, which was not observed in doublecortin (DCX)-labeled cells, microglia, or astrocytes. Reverse transcription polymerase chain reaction (RT-PCR) analysis of isolated hippocampal tissue revealed that a significant percent of genes involved with inflammation are affected by treatment with NT-020. In addition, several genes that regulate Wnt activity were affected by supplementation. CONCLUSIONS The results suggest that NT-020 activates oxidative stress response pathways and supports pro-neurogenic gene expression in the hippocampus. This may represent the mechanism by which the NT-020 formula enhances performance in learning and memory tasks in aged mice.
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Affiliation(s)
- Antwoine Flowers
- Department of Neurosurgery Brain Repair, and Center of Excellence for Aging and Brain Repair, University of South Florida Morsani College of Medicine, MDC-78, 12901 Bruce B Downs, Blvd, Tampa, FL, 33612, USA.
| | - Jea-Young Lee
- Department of Neurosurgery Brain Repair, and Center of Excellence for Aging and Brain Repair, University of South Florida Morsani College of Medicine, MDC-78, 12901 Bruce B Downs, Blvd, Tampa, FL, 33612, USA.
| | - Sandra Acosta
- Department of Neurosurgery Brain Repair, and Center of Excellence for Aging and Brain Repair, University of South Florida Morsani College of Medicine, MDC-78, 12901 Bruce B Downs, Blvd, Tampa, FL, 33612, USA.
| | - Charles Hudson
- Research Service, James A Haley Veterans Hospital, Tampa, FL, USA.
| | - Brent Small
- School of Aging Studies, University of South Florida, 4202 E. Fowler Ave, Tampa, FL, 33620, USA.
| | | | - Paula C Bickford
- Department of Neurosurgery Brain Repair, and Center of Excellence for Aging and Brain Repair, University of South Florida Morsani College of Medicine, MDC-78, 12901 Bruce B Downs, Blvd, Tampa, FL, 33612, USA. .,Research Service, James A Haley Veterans Hospital, Tampa, FL, USA.
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22
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Suehiro T, Tsuruya K, Ikeda H, Toyonaga J, Yamada S, Noguchi H, Tokumoto M, Kitazono T. Systemic Aldosterone, But Not Angiotensin II, Plays a Pivotal Role in the Pathogenesis of Renal Injury in Chronic Nitric Oxide-Deficient Male Rats. Endocrinology 2015; 156:2657-66. [PMID: 25872005 DOI: 10.1210/en.2014-1369] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Chronic inhibition of nitric oxide synthase by N(ω)-nitro-L-arginine methyl ester (L-NAME) causes progressive renal injury and systemic hypertension. Angiotensin II (Ang II) has been conventionally regarded as one of the primary causes of renal injury. We reported previously that such renal injury was almost completely suppressed by both an Ang II type I receptor blocker and an aldosterone antagonist. The aldosterone antagonist also inhibited the systemic Ang II elevation. Therefore, it remains to be elucidated whether Ang II or aldosterone directly affects the development of such renal injury. In the present study, we investigated the role of aldosterone in the pathogenesis of renal injury induced by L-NAME-mediated chronic nitric oxide synthase inhibition in male Wistar rats (aged 10 wk). Serial analyses demonstrated that the renal injury and inflammation in L-NAME-treated rats was associated with elevation of both Ang II and aldosterone. To investigate the direct effect of aldosterone on the renal injury, we conducted adrenalectomy (ADX) and aldosterone supplementation in L-NAME-treated rats. In ADX rats, aldosterone was undetectable, and renal injury and inflammation were almost completely prevented by ADX, although systemic and local Ang II and blood pressure were still elevated. Aldosterone supplementation reversed the beneficial effect of ADX. The present study indicates that aldosterone rather than Ang II plays a central and direct role in the pathogenesis of renal injury by L-NAME through inflammation, independent of its systemic hemodynamic effects.
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Affiliation(s)
- Takaichi Suehiro
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
| | - Kazuhiko Tsuruya
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
| | - Hirofumi Ikeda
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
| | - Jiro Toyonaga
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
| | - Shunsuke Yamada
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
| | - Hideko Noguchi
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
| | - Masanori Tokumoto
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
| | - Takanari Kitazono
- Department of Medicine and Clinical Science (T.S., K.T., H.I., J.T., S.Y., H.N., T.K.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; Department of Integrated Therapy for Chronic Kidney Disease (K.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan; and Department of Internal Medicine (S.Y., M.T.), Fukuoka Dental College, Fukuoka 814-0175, Japan
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23
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Zambrano E, Reyes-Castro LA, Nathanielsz PW. Aging, glucocorticoids and developmental programming. AGE (DORDRECHT, NETHERLANDS) 2015; 37:9774. [PMID: 25953670 PMCID: PMC4424198 DOI: 10.1007/s11357-015-9774-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 04/02/2015] [Indexed: 06/04/2023]
Abstract
Glucocorticoids are pleiotropic regulators of multiple cell types with critical roles in physiological systems that change across the life-course. Although glucocorticoids have been associated with aging, available data on the aging trajectory in basal circulating glucocorticoids are conflicting. A literature search reveals sparse life-course data. We evaluated (1) the profile of basal circulating corticosterone across the life-course from weaning (postnatal day-PND 21), young adult PND 110, adult PND 450, mature adult PND 650 to aged phase PND 850 in a well-characterized homogeneous rat colony to determine existence of significant changes in trajectory in the second half of life; (2) sex differences; and (3) whether developmental programming of offspring by exposure to maternal obesity during development alters the later-life circulating corticosterone trajectory. We identified (1) a fall in corticosterone between PND 450 and 650 in both males and females (p < 0.05) and (2) higher female than male concentrations (p < 0.05). (3) Using our five life-course time-point data set, corticosterone fell at a similar age but from higher levels in male and female offspring of obese mothers. In all four groups studied, there was a second half of life fall in corticosterone. Higher corticosterone levels in offspring of obese mothers may play a role in their shorter life-span, but the age-associated fall occurs at a similar time to control offspring. Although even more life-course time-points would be useful, a five life-course time-point analysis provides important new information on normative and programmed aging of circulating corticosterone.
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Affiliation(s)
- E. Zambrano
- />Reproductive Biology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, 14000 Mexico
| | - L. A. Reyes-Castro
- />Reproductive Biology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, 14000 Mexico
| | - P. W. Nathanielsz
- />Department of Animal Science, University of Wyoming, Laramie, WY 82071-3684 USA
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24
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Tesic V, Perovic M, Lazic D, Kojic S, Smiljanic K, Ruzdijic S, Rakic L, Kanazir S. Long-term intermittent feeding restores impaired GR signaling in the hippocampus of aged rat. J Steroid Biochem Mol Biol 2015; 149:43-52. [PMID: 25616002 DOI: 10.1016/j.jsbmb.2015.01.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 01/15/2015] [Accepted: 01/19/2015] [Indexed: 11/22/2022]
Abstract
Diminished glucocorticoid signaling is associated with an age-related decline in hippocampal functioning. In this study we demonstrate the effect of intermittent, every other day (EOD) feeding on the glucocorticoid hormone/glucocorticoid receptor (GR) system in the hippocampus of middle-aged (18-month-old) and aged (24-month-old) Wistar rats. In aged ad libitum-fed rats, a decrease in the level of total GR and GR phosphorylated at Ser(232) (pGR) was detected. Conversely, aged rats subjected to EOD feeding, starting from 6 months of age, showed an increase in GR and pGR levels and a higher content of hippocampal corticosterone. Furthermore, prominent nuclear staining of pGR was observed in CA1 pyramidal and DG granule neurons of aged EOD-fed rats. These changes were accompanied by increased Sgk-1 and decreased GFAP transcription, pointing to upregulated transcriptional activity of GR. EOD feeding also induced an increase in the expression of the mineralocorticoid receptor. Our results reveal that intermittent feeding restores impaired GR signaling in the hippocampus of aged animals by inducing rather than by stabilizing GR signaling during aging.
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Affiliation(s)
- Vesna Tesic
- Institute for Biological Research, University of Belgrade, Belgrade, Serbia
| | - Milka Perovic
- Institute for Biological Research, University of Belgrade, Belgrade, Serbia
| | - Divna Lazic
- Institute for Biological Research, University of Belgrade, Belgrade, Serbia
| | - Snezana Kojic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Kosara Smiljanic
- Institute for Biological Research, University of Belgrade, Belgrade, Serbia
| | - Sabera Ruzdijic
- Institute for Biological Research, University of Belgrade, Belgrade, Serbia
| | | | - Selma Kanazir
- Institute for Biological Research, University of Belgrade, Belgrade, Serbia.
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25
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Buechel HM, Popovic J, Staggs K, Anderson KL, Thibault O, Blalock EM. Aged rats are hypo-responsive to acute restraint: implications for psychosocial stress in aging. Front Aging Neurosci 2014; 6:13. [PMID: 24575039 PMCID: PMC3921565 DOI: 10.3389/fnagi.2014.00013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 01/20/2014] [Indexed: 11/13/2022] Open
Abstract
Cognitive processes associated with prefrontal cortex and hippocampus decline with age and are vulnerable to disruption by stress. The stress/stress hormone/allostatic load hypotheses of brain aging posit that brain aging, at least in part, is the manifestation of life-long stress exposure. In addition, as humans age, there is a profound increase in the incidence of new onset stressors, many of which are psychosocial (e.g., loss of job, death of spouse, social isolation), and aged humans are well-understood to be more vulnerable to the negative consequences of such new-onset chronic psychosocial stress events. However, the mechanistic underpinnings of this age-related shift in chronic psychosocial stress response, or the initial acute phase of that chronic response, have been less well-studied. Here, we separated young (3 month) and aged (21 month) male F344 rats into control and acute restraint (an animal model of psychosocial stress) groups (n = 9–12/group). We then assessed hippocampus-associated behavioral, electrophysiological, and transcriptional outcomes, as well as blood glucocorticoid and sleep architecture changes. Aged rats showed characteristic water maze, deep sleep, transcriptome, and synaptic sensitivity changes compared to young. Young and aged rats showed similar levels of distress during the 3 h restraint, as well as highly significant increases in blood glucocorticoid levels 21 h after restraint. However, young, but not aged, animals responded to stress exposure with water maze deficits, loss of deep sleep and hyperthermia. These results demonstrate that aged subjects are hypo-responsive to new-onset acute psychosocial stress, which may have negative consequences for long-term stress adaptation and suggest that age itself may act as a stressor occluding the influence of new onset stressors.
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Affiliation(s)
- Heather M Buechel
- Blalock Laboratory, Department of Molecular and Biomedical Pharmacology, College of Medicine, University of Kentucky Lexington, KY, USA
| | - Jelena Popovic
- Blalock Laboratory, Department of Molecular and Biomedical Pharmacology, College of Medicine, University of Kentucky Lexington, KY, USA
| | - Kendra Staggs
- Blalock Laboratory, Department of Molecular and Biomedical Pharmacology, College of Medicine, University of Kentucky Lexington, KY, USA
| | - Katie L Anderson
- Thibault Laboratory, Department of Molecular and Biomedical Pharmacology, College of Medicine, University of Kentucky Lexington, KY, USA
| | - Olivier Thibault
- Thibault Laboratory, Department of Molecular and Biomedical Pharmacology, College of Medicine, University of Kentucky Lexington, KY, USA
| | - Eric M Blalock
- Blalock Laboratory, Department of Molecular and Biomedical Pharmacology, College of Medicine, University of Kentucky Lexington, KY, USA
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26
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Mapping NAD(+) metabolism in the brain of ageing Wistar rats: potential targets for influencing brain senescence. Biogerontology 2013; 15:177-98. [PMID: 24337988 DOI: 10.1007/s10522-013-9489-5] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 12/09/2013] [Indexed: 12/21/2022]
Abstract
Over the last decade, the importance of NAD(+) has expanded beyond its role as an essential cofactor for energy metabolism. NAD(+) has emerged as a major signalling molecule that serves as the sole substrate for several enzymatic reactions including the DNA repair enzyme, poly(ADP-ribose) polymerase (PARP), NAD-dependent protein deacetylases or CD38, and transcriptional factors by a new class of histone deacetylases known as sirtuins. NAD(+) levels are regulated by the metabolic status and cellular stress caused by oxidative stress and DNA damage. Since a detailed study of NAD(+) metabolism in the healthy ageing mammalian brain is nascent, we examined the effect of ageing on intracellular NAD(+) metabolism in different brain regions in female Wistar rats in young (3 months), middle aged (12 months) and older adults (24 months). Our results are the first to show a significant decline in intracellular NAD(+) levels and NAD:NADH ratio with ageing in the CNS, occurring in parallel to an increase in lipid peroxidation and protein oxidation (o- and m-tyrosine) and a decline in total antioxidant capacity. Hyperphosphorylation of H2AX levels was also observed together with increased PARP-1 and PARP-2 expression, and CD38 activity, concomitantly with reduced NAD(+) and ATP levels and SIRT1 function in the cortex, brainstem, hippocampus and cerebellum. Reduced activity of mitochondrial complex I-IV and impaired maximum mitochondrial respiration rate were also observed in the ageing rat brain. Among the multiple physiological pathways associated with NAD(+) catabolism, our discovery of CD38 as the major regulator of cellular NAD(+) levels in rat neurons indicates that CD38 is a promising therapeutic target for the treatment of age-related neurodegenerative diseases.
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27
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Kim TS, Han DH, Lee YJ, Son GH, Kim K, Kim CJ, Cho S. Adrenal peripheral clock disruption leads to altered circadian behavioral responses to voluntary exercise in middle-aged female mice. Anim Cells Syst (Seoul) 2013. [DOI: 10.1080/19768354.2013.860916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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28
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Gant JC, Blalock EM, Chen KC, Kadish I, Porter NM, Norris CM, Thibault O, Landfield PW. FK506-binding protein 1b/12.6: a key to aging-related hippocampal Ca2+ dysregulation? Eur J Pharmacol 2013; 739:74-82. [PMID: 24291098 DOI: 10.1016/j.ejphar.2013.10.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 10/16/2013] [Accepted: 10/17/2013] [Indexed: 12/25/2022]
Abstract
It has been recognized for some time that the Ca(2+)-dependent slow afterhyperpolarization (sAHP) is larger in hippocampal neurons of aged compared with young animals. In addition, extensive studies since have shown that other Ca(2+)-mediated electrophysiological responses are increased in hippocampus with aging, including Ca(2+) transients, L-type voltage-gated Ca(2+) channel activity, Ca(2+) spike duration and action potential accommodation. Elevated Ca(2+)-induced Ca(2+) release from ryanodine receptors (RyRs) appears to drive amplification of the Ca(2+) responses. Components of this Ca(2+) dysregulation phenotype correlate with deficits in cognitive function and plasticity, indicating they may play critical roles in aging-related impairment of brain function. However, the molecular mechanisms underlying aging-related Ca(2+) dysregulation are not well understood. FK506-binding proteins 1a and 1b (FKBP1a/1b, also known as FKBP12/12.6) are immunophilin proteins that bind the immunosuppressant drugs FK506 and rapamycin. In muscle cells, FKBP1a/1b also bind RyRs and inhibits Ca(2+)-induced Ca(2+) release, but it is not clear whether FKBPs act similarly in brain cells. Recently, we found that selectively disrupting hippocampal FKBP1b function in young rats, either by microinjecting adeno-associated viral vectors expressing siRNA, or by treatment with rapamycin, increases the sAHP and recapitulates much of the hippocampal Ca(2+) dysregulation phenotype. Moreover, in microarray studies, we found FKBP1b gene expression was downregulated in hippocampus of aging rats and early-stage Alzheimer's disease subjects. These results suggest the novel hypothesis that declining FKBP function is a key factor in aging-related Ca(2+) dysregulation in the brain and point to potential new therapeutic targets for counteracting unhealthy brain aging.
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Affiliation(s)
- J C Gant
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States
| | - E M Blalock
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States
| | - K-C Chen
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States
| | - I Kadish
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States
| | - N M Porter
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States
| | - C M Norris
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States
| | - O Thibault
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States
| | - P W Landfield
- Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 800 Rose St., UKMC Lexington, KY 40536, United States.
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