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Vázquez-Lizarraga R, Mendoza-Viveros L, Cid-Castro C, Ruiz-Montoya S, Carreño-Vázquez E, Orozco-Solis R. Hypothalamic circuits and aging: keeping the circadian clock updated. Neural Regen Res 2024; 19:1919-1928. [PMID: 38227516 DOI: 10.4103/1673-5374.389624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/20/2023] [Indexed: 01/17/2024] Open
Abstract
Over the past century, age-related diseases, such as cancer, type-2 diabetes, obesity, and mental illness, have shown a significant increase, negatively impacting overall quality of life. Studies on aged animal models have unveiled a progressive discoordination at multiple regulatory levels, including transcriptional, translational, and post-translational processes, resulting from cellular stress and circadian derangements. The circadian clock emerges as a key regulator, sustaining physiological homeostasis and promoting healthy aging through timely molecular coordination of pivotal cellular processes, such as stem-cell function, cellular stress responses, and inter-tissue communication, which become disrupted during aging. Given the crucial role of hypothalamic circuits in regulating organismal physiology, metabolic control, sleep homeostasis, and circadian rhythms, and their dependence on these processes, strategies aimed at enhancing hypothalamic and circadian function, including pharmacological and non-pharmacological approaches, offer systemic benefits for healthy aging. Intranasal brain-directed drug administration represents a promising avenue for effectively targeting specific brain regions, like the hypothalamus, while reducing side effects associated with systemic drug delivery, thereby presenting new therapeutic possibilities for diverse age-related conditions.
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Affiliation(s)
| | - Lucia Mendoza-Viveros
- Instituto Nacional de Medicina Genómica (INMEGEN), México City, México
- Centro de Investigacíon sobre el Envejecimiento, Centro de Investigacíon y de Estudios Avanzados (CIE-CINVESTAV), México City, México
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México UNAM, México City, México
| | - Carolina Cid-Castro
- Instituto Nacional de Medicina Genómica (INMEGEN), México City, México
- Centro de Investigacíon sobre el Envejecimiento, Centro de Investigacíon y de Estudios Avanzados (CIE-CINVESTAV), México City, México
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México UNAM, México City, México
| | | | | | - Ricardo Orozco-Solis
- Instituto Nacional de Medicina Genómica (INMEGEN), México City, México
- Centro de Investigacíon sobre el Envejecimiento, Centro de Investigacíon y de Estudios Avanzados (CIE-CINVESTAV), México City, México
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2
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Camacho-Morales A, Cárdenas-Tueme M. Prenatal Programming of Monocyte Chemotactic Protein-1 Signaling in Autism Susceptibility. Mol Neurobiol 2024; 61:6119-6134. [PMID: 38277116 DOI: 10.1007/s12035-024-03940-z] [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: 09/12/2023] [Accepted: 01/11/2024] [Indexed: 01/27/2024]
Abstract
Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder that involves functional and structural defects in selective central nervous system (CNS) regions, harming the individual capability to process and respond to external stimuli, including impaired verbal and non-verbal communications. Etiological causes of ASD have not been fully clarified; however, prenatal activation of the innate immune system by external stimuli might infiltrate peripheral immune cells into the fetal CNS and activate cytokine secretion by microglia and astrocytes. For instance, genomic and postmortem histological analysis has identified proinflammatory gene signatures, microglia-related expressed genes, and neuroinflammatory markers in the brain during ASD diagnosis. Active neuroinflammation might also occur during the developmental stage, promoting the establishment of a defective brain connectome and increasing susceptibility to ASD after birth. While still under investigation, we tested the hypothesis whether the monocyte chemoattractant protein-1 (MCP-1) signaling is prenatally programmed to favor peripheral immune cell infiltration and activate microglia into the fetal CNS, setting susceptibility to autism-like behavior. In this review, we will comprehensively provide the current understanding of the prenatal activation of MCP-1 signaling by external stimuli during the developmental stage as a new selective node to promote neuroinflammation, brain structural alterations, and behavioral defects associated to ASD diagnosis.
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Affiliation(s)
- Alberto Camacho-Morales
- College of Medicine, Department of Biochemistry, Universidad Autónoma de Nuevo Leon, Monterrey, NL, Mexico.
- Center for Research and Development in Health Sciences, Neurometabolism Unit, Universidad Autónoma de Nuevo Leon, San Nicolás de los Garza, Monterrey, NL, Mexico.
| | - Marcela Cárdenas-Tueme
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de La Salud and The Institute for Obesity Research, 64710, Monterrey, Mexico
- Nutrition Unit, Center for Research and Development in Health Sciences, Universidad Autonoma de Nuevo Leon, 64460, Monterrey, Mexico
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3
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Palmisano M, Ramunno CF, Farhat E, Dvir-Ginzberg M, Lutz B, de Almodovar CR, Bilkei-Gorzo A. Local cannabinoid receptor type-1 regulates glial cell activity and insulin-like growth factor-1 receptor signaling in the mediobasal hypothalamus. Mech Ageing Dev 2024; 220:111954. [PMID: 38821184 DOI: 10.1016/j.mad.2024.111954] [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: 04/03/2024] [Revised: 05/17/2024] [Accepted: 05/27/2024] [Indexed: 06/02/2024]
Abstract
As organisms age, the activity of the endocannabinoid system in the brain declines, coinciding with increased neuroinflammation and disrupted hypothalamic functions. Notably, cannabinoid receptors type-1 (CB1) are highly expressed in the ventromedial hypothalamic nucleus (VMH) within the mediobasal hypothalamus, a central area of neuroendocrine regulation. This study investigates whether the CB1 receptor influences age-related changes in a brain region-dependent manner. Therefore, we performed stereotaxic injections of rAAV1/2 expressing Cre recombinase in 2-month-old CB1flox/flox male animals to delete the CB1 gene and in CB1-deficient (CB1-STOP) mice to induce its re-expression. The intensity of pro-inflammatory glial activity, gonadotropin-releasing hormone (GnRH) and insulin-like growth factor-1 receptor (IGF-1R) expression was assessed in the hypothalamus of mice at 18-19 months of age. Site-specific CB1 receptor deletion induced pro-inflammatory glial activity and increased hypothalamic Igf1r mRNA expression. Unexpectedly, GnRH levels remained unaltered. Importantly, rescuing the receptor in null mutant animals had the opposite effect: it reduced pro-inflammatory glial activation and decreased Igf1r mRNA expression without affecting GnRH production. Overall, the study highlights the important role of the CB1 receptor in the VMH in reducing age-related inflammation and modulating IGF-1R signaling.
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Affiliation(s)
- Michela Palmisano
- Institute of Molecular Psychiatry, Medical Faculty, University Clinics of Bonn, Bonn 53125, Germany
| | - Carla Florencia Ramunno
- Institute for Neurovascular Cell Biology, University Hospital Bonn, University Clinics of Bonn, Bonn 53125, Germany
| | - Eli Farhat
- Institute of Biomedical and Oral Research, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 12272, Israel
| | - Mona Dvir-Ginzberg
- Institute of Biomedical and Oral Research, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem 12272, Israel
| | - Beat Lutz
- Institute of Physiological Chemistry, University Medical Center of the Johannes Gutenberg University Mainz, Mainz 55131, Germany; Leibniz Institute for Resilience Research, Mainz 55122, Germany
| | - Carmen Ruiz de Almodovar
- Institute for Neurovascular Cell Biology, University Hospital Bonn, University Clinics of Bonn, Bonn 53125, Germany
| | - Andras Bilkei-Gorzo
- Institute of Molecular Psychiatry, Medical Faculty, University Clinics of Bonn, Bonn 53125, Germany.
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4
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Liu AC, Shen Y, Serbinski CR, He H, Roman D, Endale M, Aschbacher-Smith L, King KA, Granadillo JL, López I, Krueger DA, Dye TJ, Smith DF, Hogenesch JB, Prada CE. Clinical and functional studies of MTOR variants in Smith-Kingsmore syndrome reveal deficits of circadian rhythm and sleep-wake behavior. HGG ADVANCES 2024; 5:100333. [PMID: 39030910 DOI: 10.1016/j.xhgg.2024.100333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 07/13/2024] [Accepted: 07/15/2024] [Indexed: 07/22/2024] Open
Abstract
Heterozygous de novo or inherited gain-of-function mutations in the MTOR gene cause Smith-Kingsmore syndrome (SKS). SKS is a rare autosomal dominant condition, and individuals with SKS display macrocephaly/megalencephaly, developmental delay, intellectual disability, and seizures. A few dozen individuals are reported in the literature. Here, we report a cohort of 28 individuals with SKS that represent nine MTOR pathogenic variants. We conducted a detailed natural history study and found pathophysiological deficits among individuals with SKS in addition to the common neurodevelopmental symptoms. These symptoms include sleep-wake disturbance, hyperphagia, and hyperactivity, indicative of homeostatic imbalance. To characterize these variants, we developed cell models and characterized their functional consequences. We showed that these SKS variants display a range of mechanistic target of rapamycin (mTOR) activities and respond to the mTOR inhibitor, rapamycin, differently. For example, the R1480_C1483del variant we identified here and the previously known C1483F are more active than wild-type controls and less responsive to rapamycin. Further, we showed that SKS mutations dampened circadian rhythms and low-dose rapamycin improved the rhythm amplitude, suggesting that optimal mTOR activity is required for normal circadian function. As SKS is caused by gain-of-function mutations in MTOR, rapamycin was used to treat several patients. While higher doses of rapamycin caused delayed sleep-wake phase disorder in a subset of patients, optimized lower doses improved sleep. Our study expands the clinical and molecular spectrum of SKS and supports further studies for mechanism-guided treatment options to improve sleep-wake behavior and overall health.
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Affiliation(s)
- Andrew C Liu
- Department of Physiology and Aging, University of Florida College of Medicine, Gainesville, FL 32610, USA.
| | - Yang Shen
- Department of Physiology and Aging, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Carolyn R Serbinski
- Divisions of Human Genetics, Neurology, Immunobiology, Pediatric Otolaryngology, and Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Division of Genetics, Genomics & Metabolism, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL 60611, USA
| | - Hongzhi He
- Department of Physiology and Aging, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Destino Roman
- Department of Physiology and Aging, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Mehari Endale
- Department of Physiology and Aging, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Lindsey Aschbacher-Smith
- Divisions of Human Genetics, Neurology, Immunobiology, Pediatric Otolaryngology, and Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Katherine A King
- Division of Genetics and Genomic Medicine, Department of Pediatrics, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Jorge L Granadillo
- Division of Genetics and Genomic Medicine, Department of Pediatrics, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA
| | - Isabel López
- Pediatric Neurology Unit, Department of Neurology, Clínica Las Condes, Santiago, Chile
| | - Darcy A Krueger
- Divisions of Human Genetics, Neurology, Immunobiology, Pediatric Otolaryngology, and Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Thomas J Dye
- Divisions of Human Genetics, Neurology, Immunobiology, Pediatric Otolaryngology, and Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - David F Smith
- Divisions of Pediatric Otolaryngology and Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; The Sleep Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; The Center for Circadian Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Department of Otolaryngology Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - John B Hogenesch
- Divisions of Human Genetics, Neurology, Immunobiology, Pediatric Otolaryngology, and Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Carlos E Prada
- Divisions of Human Genetics, Neurology, Immunobiology, Pediatric Otolaryngology, and Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Division of Genetics, Genomics & Metabolism, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL 60611, USA; Department of Pediatrics, Feinberg School of Medicine of Northwestern University, Chicago, IL 60611, USA.
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5
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Le Thuc O, García-Cáceres C. Obesity-induced inflammation: connecting the periphery to the brain. Nat Metab 2024; 6:1237-1252. [PMID: 38997442 DOI: 10.1038/s42255-024-01079-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 06/11/2024] [Indexed: 07/14/2024]
Abstract
Obesity is often associated with a chronic, low-grade inflammatory state affecting the entire body. This sustained inflammatory state disrupts the coordinated communication between the periphery and the brain, which has a crucial role in maintaining homeostasis through humoural, nutrient-mediated, immune and nervous signalling pathways. The inflammatory changes induced by obesity specifically affect communication interfaces, including the blood-brain barrier, glymphatic system and meninges. Consequently, brain areas near the third ventricle, including the hypothalamus and other cognition-relevant regions, become susceptible to impairments, resulting in energy homeostasis dysregulation and an elevated risk of cognitive impairments such as Alzheimer's disease and dementia. This Review explores the intricate communication between the brain and the periphery, highlighting the effect of obesity-induced inflammation on brain function.
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Affiliation(s)
- Ophélia Le Thuc
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Cristina García-Cáceres
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, Neuherberg, Germany.
- German Center for Diabetes Research (DZD), Neuherberg, Germany.
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Ludwig-Maximilians-Universität München, Munich, Germany.
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Krarup J, Araya L, Álvarez F, Bórquez DA, Urrutia PJ. A Brain Anti-Senescence Transcriptional Program Triggered by Hypothalamic-Derived Exosomal microRNAs. Int J Mol Sci 2024; 25:5467. [PMID: 38791505 PMCID: PMC11122052 DOI: 10.3390/ijms25105467] [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: 03/14/2024] [Revised: 05/08/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
In contrast to the hypothesis that aging results from cell-autonomous deterioration processes, the programmed longevity theory proposes that aging arises from a partial inactivation of a "longevity program" aimed at maintaining youthfulness in organisms. Supporting this hypothesis, age-related changes in organisms can be reversed by factors circulating in young blood. Concordantly, the endocrine secretion of exosomal microRNAs (miRNAs) by hypothalamic neural stem cells (htNSCs) regulates the aging rate by enhancing physiological fitness in young animals. However, the specific molecular mechanisms through which hypothalamic-derived miRNAs exert their anti-aging effects remain unexplored. Using experimentally validated miRNA-target gene interactions and single-cell transcriptomic data of brain cells during aging and heterochronic parabiosis, we identify the main pathways controlled by these miRNAs and the cell-type-specific gene networks that are altered due to age-related loss of htNSCs and the subsequent decline in specific miRNA levels in the cerebrospinal fluid (CSF). Our bioinformatics analysis suggests that these miRNAs modulate pathways associated with senescence and cellular stress response, targeting crucial genes such as Cdkn2a, Rps27, and Txnip. The oligodendrocyte lineage appears to be the most responsive to age-dependent loss of exosomal miRNA, leading to significant derepression of several miRNA target genes. Furthermore, heterochronic parabiosis can reverse age-related upregulation of specific miRNA-targeted genes, predominantly in brain endothelial cells, including senescence promoting genes such as Cdkn1a and Btg2. Our findings support the presence of an anti-senescence mechanism triggered by the endocrine secretion of htNSC-derived exosomal miRNAs, which is associated with a youthful transcriptional signature.
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Affiliation(s)
- Josefa Krarup
- Laboratory of Cell Signaling & Bioinformatics, Center for Biomedical Research, Faculty of Medicine, Universidad Diego Portales, Ejército Libertador 141, Santiago 8370007, Chile; (J.K.); (F.Á.)
| | - Lucas Araya
- Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago 7810000, Chile;
| | - Felipe Álvarez
- Laboratory of Cell Signaling & Bioinformatics, Center for Biomedical Research, Faculty of Medicine, Universidad Diego Portales, Ejército Libertador 141, Santiago 8370007, Chile; (J.K.); (F.Á.)
| | - Daniel A. Bórquez
- Laboratory of Cell Signaling & Bioinformatics, Center for Biomedical Research, Faculty of Medicine, Universidad Diego Portales, Ejército Libertador 141, Santiago 8370007, Chile; (J.K.); (F.Á.)
| | - Pamela J. Urrutia
- Laboratory of Resilient Aging, Institute for Nutrition & Food Technology (INTA), Universidad de Chile, El Líbano 5524, Santiago 7830490, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago 7800003, Chile
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7
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Shang Y, Wang X, Su S, Ji F, Shao D, Duan C, Chen T, Liang C, Zhang D, Lu H. Identifying of immune-associated genes for assessing the obesity-associated risk to the offspring in maternal obesity: A bioinformatics and machine learning. CNS Neurosci Ther 2024; 30:e14700. [PMID: 38544384 PMCID: PMC10973700 DOI: 10.1111/cns.14700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 05/14/2024] Open
Abstract
BACKGROUND Perinatal exposure to maternal obesity predisposes offspring to develop obesity later in life. Immune dysregulation in the hypothalamus, the brain center governing energy homeostasis, is pivotal in obesity development. This study aimed to identify key candidate genes associated with the risk of offspring obesity in maternal obesity. METHODS We obtained obesity-related datasets from the Gene Expression Omnibus (GEO) database. GSE135830 comprises gene expression data from the hypothalamus of mouse offspring in a maternal obesity model induced by a high-fat diet model (maternal high-fat diet (mHFD) group and maternal chow (mChow) group), while GSE127056 consists of hypothalamus microarray data from young adult mice with obesity (high-fat diet (HFD) and Chow groups). We identified differentially expressed genes (DEGs) and module genes using Limma and weighted gene co-expression network analysis (WGCNA), conducted functional enrichment analysis, and employed a machine learning algorithm (least absolute shrinkage and selection operator (LASSO) regression) to pinpoint candidate hub genes for diagnosing obesity-associated risk in offspring of maternal obesity. We constructed a nomogram receiver operating characteristic (ROC) curve to evaluate the diagnostic value. Additionally, we analyzed immune cell infiltration to investigate immune cell dysregulation in maternal obesity. Furthermore, we verified the expression of the candidate hub genes both in vivo and in vitro. RESULTS The GSE135830 dataset revealed 2868 DEGs between the mHFD offspring and the mChow group and 2627 WGCNA module genes related to maternal obesity. The overlap of DEGs and module genes in the offspring with maternal obesity in GSE135830 primarily enriched in neurodevelopment and immune regulation. In the GSE127056 dataset, 133 DEGs were identified in the hypothalamus of HFD-induced adult obese individuals. A total of 13 genes intersected between the GSE127056 adult obesity DEGs and the GSE135830 maternal obesity module genes that were primarily enriched in neurodevelopment and the immune response. Following machine learning, two candidate hub genes were chosen for nomogram construction. Diagnostic value evaluation by ROC analysis determined Sytl4 and Kncn2 as hub genes for maternal obesity in the offspring. A gene regulatory network with transcription factor-miRNA interactions was established. Dysregulated immune cells were observed in the hypothalamus of offspring with maternal obesity. Expression of Sytl4 and Kncn2 was validated in a mouse model of hypothalamic inflammation and a palmitic acid-stimulated microglial inflammation model. CONCLUSION Two candidate hub genes (Sytl4 and Kcnc2) were identified and a nomogram was developed to predict obesity risk in offspring with maternal obesity. These findings offer potential diagnostic candidate genes for identifying obesity-associated risks in the offspring of obese mothers.
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Affiliation(s)
- Yanxing Shang
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
| | - Xueqin Wang
- Department of Endocrinology, Affiliated Hospital 2Nantong UniversityNantongChina
| | - Sixuan Su
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
- Department of Pathogen Biology, Medical CollegeNantong UniversityNantongChina
| | - Feng Ji
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
| | - Donghai Shao
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
| | - Chengwei Duan
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
| | - Tianpeng Chen
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
| | - Caixia Liang
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
| | - Dongmei Zhang
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Nantong Clinical Medical College of Kangda College of Nanjing Medical UniversityNantongChina
- Nantong Municipal Key Laboratory of Metabolic Immunology and Disease MicroenvironmentNantong First People's HospitalNantongChina
- Department of Pathogen Biology, Medical CollegeNantong UniversityNantongChina
| | - Hongjian Lu
- Medical Research Center, Affiliated Hospital 2Nantong UniversityNantongChina
- Jiangsu Provincial Medical Key Discipline (Laboratory) Cultivation Unit, Medical Research CenterNantong First People's HospitalNantongChina
- Department of Rehabilitation Medicine, Affiliated Hospital 2Nantong UniversityNantongChina
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8
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Di Bello M, Chang C, McIntosh R. Dynamic vagal-mediated connectivity of cortical and subcortical central autonomic hubs predicts chronotropic response to submaximal exercise in healthy adults. Brain Cogn 2024; 175:106134. [PMID: 38266398 DOI: 10.1016/j.bandc.2024.106134] [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: 08/23/2023] [Revised: 11/27/2023] [Accepted: 01/06/2024] [Indexed: 01/26/2024]
Abstract
BACKGROUND Despite accumulation of a substantial body of literature supporting the role of exercise on frontal lobe functioning, relatively less is understood of the interconnectivity of ventromedial prefrontal cortical (vmPFC) regions that underpin cardio-autonomic regulation predict cardiac chronotropic competence (CC) in response to sub-maximal exercise. METHODS Eligibility of 161 adults (mean age = 48.6, SD = 18.3, 68% female) was based upon completion of resting state brain scan and sub-maximal bike test. Sliding window analysis of the resting state signal was conducted over 45-s windows, with 50% overlap, to assess how changes in photoplethysmography-derived HRV relate to vmPFC functional connectivity with the whole brain. CC was assessed based upon heart rate (HR) changes during submaximal exercise (HR change /HRmax (206-0.88 × age) - HRrest). RESULTS During states of elevated HRV the vmPFC showed greater rsFC with an 83-voxel region of the hypothalamus (p < 0.001, uncorrected). Beta estimates of vmPFC connectivity extracted from a 6-mm sphere around this region emerged as the strongest predictor of CC (b = 0.283, p <.001) than age, BMI, and resting HRV F(8,144) = 6.30, p <.001. CONCLUSION Extensive glutamatergic innervation of the hypothalamus by the vmPFC allows for top-down control of the hypothalamus and its various autonomic efferents which facilitate chronotropic response during sub-maximal exercise.
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Affiliation(s)
- Maria Di Bello
- Department of Psychology, Sapienza University of Rome, Rome, Italy
| | - Catie Chang
- Department of Computer Science, Vanderbilt University, Nashville, TN, USA
| | - Roger McIntosh
- Department of Psychology, University of Miami, Coral Gables, FL 33124, USA.
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9
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Liu J, Zaidi A, Pike CJ. Microglia/macrophage-specific deletion of TLR-4 protects against neural effects of diet-induced obesity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.13.580189. [PMID: 38405877 PMCID: PMC10888944 DOI: 10.1101/2024.02.13.580189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Obesity is associated with numerous adverse neural effects, including reduced neurogenesis, cognitive impairment, and increased risks for developing Alzheimer's disease (AD) and vascular dementia. Obesity is also characterized by chronic, low-grade inflammation that is implicated in mediating negative consequences body-wide. Toll-like receptor 4 (TLR4) signaling from peripheral macrophages is implicated as an essential regulator of the systemic inflammatory effects of obesity. In the brain, obesity drives chronic neuroinflammation that involves microglial activation, however the contributions of microglia-derived TLR4 signaling to the consequences of obesity are poorly understood. To investigate this issue, we first generated mice that carry an inducible, microglia/macrophage-specific deletion of TLR4 that yields long-term TLR4 knockout only in brain indicating microglial specificity. Next, we analyzed the effects of microglial TLR4 deletion on systemic and neural effects of a 16-week of exposure to control versus obesogenic high-fat diets. In male mice, TLR4 deletion generally yielded limited effects on diet-induced systemic metabolic dysfunction but significantly reduced neuroinflammation and impairments in neurogenesis and cognitive performance. In female mice maintained on obesogenic diet, TLR4 deletion partially protected against weight gain, adiposity, and metabolic impairments. Compared to males, females showed milder diet-induced neural consequences, against which TLR4 deletion was protective. Collectively, these findings demonstrate a central role of microglial TLR4 signaling in mediating the neural effects of obesogenic diet and highlight sexual dimorphic responses to both diet and TLR4.
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Xing D, Jin Y, Jin B. A narrative review on inflammaging and late-onset hypogonadism. Front Endocrinol (Lausanne) 2024; 15:1291389. [PMID: 38298378 PMCID: PMC10827931 DOI: 10.3389/fendo.2024.1291389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 01/02/2024] [Indexed: 02/02/2024] Open
Abstract
The increasing life expectancy observed in recent years has resulted in a higher prevalence of late-onset hypogonadism (LOH) in older men. LOH is characterized by the decline in testosterone levels and can have significant impacts on physical and mental health. While the underlying causes of LOH are not fully understood, there is a growing interest in exploring the role of inflammaging in its development. Inflammaging is a concept that describes the chronic, low-grade, systemic inflammation that occurs as a result of aging. This inflammatory state has been implicated in the development of various age-related diseases. Several cellular and molecular mechanisms have been identified as contributors to inflammaging, including immune senescence, cellular senescence, autophagy defects, and mitochondrial dysfunction. Despite the extensive research on inflammaging, its relationship with LOH has not yet been thoroughly reviewed in the literature. To address this gap, we aim to review the latest findings related to inflammaging and its impact on the development of LOH. Additionally, we will explore interventions that target inflammaging as potential treatments for LOH.
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Affiliation(s)
- Dong Xing
- Medical College of Southeast University, Nanjing, Jiangsu, China
| | - Yihan Jin
- Reproductive Medicine Center, Zhongda Hospital, Southeast University, Nanjing, Jiangsu, China
| | - Baofang Jin
- Andrology Department of Integrative Medicine, Zhongda Hospital, Southeast University, Nanjing, Jiangsu, China
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11
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Santos CL, Bobermin LD, Quincozes-Santos A. Aging changes the expression of adenosine receptors, insulin-like growth factor 1 (IGF1), and hypoxia-inducible factor 1α (HIF1α) in hypothalamic astrocyte cultures. AGING BRAIN 2023; 5:100104. [PMID: 38225985 PMCID: PMC10788490 DOI: 10.1016/j.nbas.2023.100104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 11/30/2023] [Accepted: 12/18/2023] [Indexed: 01/17/2024] Open
Abstract
The aging process induces neurochemical alterations in different brain regions, including hypothalamus. This pivotal area of the central nervous system (CNS) is crucial for detection and integration of nutritional and hormonal signals from the periphery of the body to maintain metabolic homeostasis. Astrocytes support the CNS homeostasis, energy metabolism, and inflammatory response, as well as increasing evidence has highlighted a critical role of astrocytes in orchestrating hypothalamic functions and in gliocrine system. In this study, we aimed to investigate the age-dependent mRNA expression of adenosine receptors, the insulin-like growth factor 1 receptor (IGF1R), and the hypoxia-inducible factor 1α (HIF1α), in addition to the levels of IGF1 and HIF1α in hypothalamic astrocyte cultures derived from newborn, adult, and aged rats. Our results revealed age-dependent changes in adenosine receptors, as well as a decrease in IGF1R/IGF1 and HIF1α. Of note, adenosine receptors, IGF1, and HIF1α are affected by inflammatory, redox, and metabolic processes, which can remodel hypothalamic properties, as observed in aging brain, reinforcing the role of hypothalamic astrocytes as targets for understanding the onset and/or progression of age-related diseases.
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Affiliation(s)
- Camila Leite Santos
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Larissa Daniele Bobermin
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - André Quincozes-Santos
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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12
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Queen NJ, Huang W, Zou X, Mo X, Cao L. AAV-BDNF gene therapy ameliorates a hypothalamic neuroinflammatory signature in the Magel2-null model of Prader-Willi syndrome. Mol Ther Methods Clin Dev 2023; 31:101108. [PMID: 37766791 PMCID: PMC10520877 DOI: 10.1016/j.omtm.2023.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023]
Abstract
Individuals with Prader-Willi syndrome (PWS) exhibit several metabolic and behavioral abnormalities associated with excessive food-seeking activity. PWS is thought to be driven in part by dysfunctional hypothalamic circuitry and blunted responses to peripheral signals of satiety. Previous work described a hypothalamic transcriptomic signature of individuals with PWS. Notably, PWS patients exhibited downregulation of genes involved in neuronal development and an upregulation of neuroinflammatory genes. Deficiencies of brain-derived neurotrophic factor (BDNF) and its receptor were identified as potential drivers of PWS phenotypes. Our group recently applied an adeno-associated viral (AAV)-BDNF gene therapy within a preclinical PWS model, Magel2-null mice, to improve metabolic and behavioral function. While this proof-of-concept project was promising, it remained unclear how AAV-BDNF was influencing the hypothalamic microenvironment and how its therapeutic effect was mediated. To investigate, we hypothalamically injected AAV-BDNF to wild type and Magel2-null mice and performed mRNA sequencing on hypothalamic tissue. Here, we report that (1) Magel2 deficiency is associated with neuroinflammation in the hypothalamus and (2) AAV-BDNF gene therapy reverses this neuroinflammation. These data newly reveal Magel2-null mice as a valid model of PWS-related neuroinflammation and furthermore suggest that AAV-BDNF may modulate obesity-related neuroinflammatory phenotypes through direct or indirect means.
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Affiliation(s)
- Nicholas J. Queen
- Department of Cancer Biology & Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
- The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Wei Huang
- Department of Cancer Biology & Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
- The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Xunchang Zou
- Department of Cancer Biology & Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
- The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Xiaokui Mo
- Department of Biomedical Informatics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Lei Cao
- Department of Cancer Biology & Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
- The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
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13
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Munkhzul C, Yi SS, Kim J, Lee S, Kim H, Moon JS, Lee M. The microRNA-mediated gene regulatory network in the hippocampus and hypothalamus of the aging mouse. PLoS One 2023; 18:e0291943. [PMID: 37943864 PMCID: PMC10635555 DOI: 10.1371/journal.pone.0291943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 09/09/2023] [Indexed: 11/12/2023] Open
Abstract
Aging leads to time-dependent functional decline of all major organs. In particular, the aging brain is prone to cognitive decline and several neurodegenerative diseases. Various studies have attempted to understand the aging process and underlying molecular mechanisms by monitoring changes in gene expression in the aging mouse brain using high-throughput sequencing techniques. However, the effect of microRNA (miRNA) on the post-transcriptional regulation of gene expression has not yet been comprehensively investigated. In this study, we performed global analysis of mRNA and miRNA expression simultaneously in the hypothalamus and hippocampus of young and aged mice. We identified aging-dependent differentially expressed genes, most of which were specific either to the hypothalamus or hippocampus. However, genes related to immune response-related pathways were enriched in upregulated differentially expressed genes, whereas genes related to metabolism-related pathways were enriched in downregulated differentially expressed genes in both regions of the aging brain. Furthermore, we identified many differentially expressed miRNAs, including three that were upregulated and three that were downregulated in both the hypothalamus and hippocampus. The two downregulated miRNAs, miR-322-3p, miR-542-3p, and the upregulated protein-encoding coding gene C4b form a regulatory network involved in complement and coagulation cascade pathways in the hypothalamus and hippocampus of the aging brain. These results advance our understanding of the miRNA-mediated gene regulatory network and its influence on signaling pathways in the hypothalamus and hippocampus of the aging mouse brain.
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Affiliation(s)
- Choijamts Munkhzul
- Soonchunhyang Institute of Medi-Bio Science, Soonchunhyang University, Cheonan, Korea
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Korea
| | - Sun Shin Yi
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Korea
| | - Junhyung Kim
- Soonchunhyang Institute of Medi-Bio Science, Soonchunhyang University, Cheonan, Korea
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Korea
| | - Seongsoo Lee
- Gwangju Center, Korea Basic Science Institute (KBSI), Gwangju, Korea
- Department of Systems Biotechnology, Chung-Ang University, Anseong, Korea
| | - Hyuntae Kim
- Gwangju Center, Korea Basic Science Institute (KBSI), Gwangju, Korea
| | - Jong-Seok Moon
- Soonchunhyang Institute of Medi-Bio Science, Soonchunhyang University, Cheonan, Korea
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Korea
| | - Mihye Lee
- Soonchunhyang Institute of Medi-Bio Science, Soonchunhyang University, Cheonan, Korea
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Korea
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14
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Yang L, Lu P, Qi X, Yang Q, Liu L, Dou T, Guan Q, Yu C. Metformin inhibits inflammatory response and endoplasmic reticulum stress to improve hypothalamic aging in obese mice. iScience 2023; 26:108082. [PMID: 37860765 PMCID: PMC10582490 DOI: 10.1016/j.isci.2023.108082] [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: 02/25/2023] [Revised: 08/20/2023] [Accepted: 09/25/2023] [Indexed: 10/21/2023] Open
Abstract
The hypothalamus, as a vital brain region for endocrine and metabolism regulation, undergoes functional disruption during obesity.The anti-aging effect of metformin has come into focus. However, whether it has the potential to ameliorate hypothalamic aging and dysfunction in the obese state remains unclear. In this study, obese mice were utilized to investigate the effects of metformin on the hypothalamus of obese mice. According to the results, metformin treatment resulted in improved insulin sensitivity, reduced blood glucose and lipid levels, as well as attenuation of hypothalamic aging, demonstrated by decreased SA-β-gal staining and downregulation of senescence markers. Additionally, metformin decreased the expression of endoplasmic reticulum stress-related proteins in neurons and reduced the inflammatory response triggered by microglia activation. Further mechanistic analysis revealed that metformin inhibited the expression and activation of STING and NLRP3 in microglia. These results reveal a possible mechanism by which metformin ameliorates hypothalamic aging.
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Affiliation(s)
- Leilei Yang
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Peng Lu
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Xiangyu Qi
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Qian Yang
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Luna Liu
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Tao Dou
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Qingbo Guan
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Chunxiao Yu
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China
- Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, China
- Shandong Engineering Laboratory of Prevention and Control for Endocrine and Metabolic Diseases, Jinan, Shandong, China
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15
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Ullah R, Shen Y, Zhou YD, Fu J. Perinatal metabolic inflammation in the hypothalamus impairs the development of homeostatic feeding circuitry. Metabolism 2023; 147:155677. [PMID: 37543245 DOI: 10.1016/j.metabol.2023.155677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/14/2023] [Accepted: 08/01/2023] [Indexed: 08/07/2023]
Abstract
Over the past few decades, there has been a global increase in childhood obesity. This rise in childhood obesity contributes to the susceptibility of impaired metabolism during both childhood and adulthood. The hypothalamus, specifically the arcuate nucleus (ARC), houses crucial neurons involved in regulating homeostatic feeding. These neurons include proopiomelanocortin (POMC) and agouti-related peptide (AGRP) secreting neurons. They play a vital role in sensing nutrients and metabolic hormones like insulin, leptin, and ghrelin. The neurogenesis of AGRP and POMC neurons completes at birth; however, axon development and synapse formation occur during the postnatal stages in rodents. Insulin, leptin, and ghrelin are the essential regulators of POMC and AGRP neurons. Maternal obesity and postnatal overfeeding or a high-fat diet (HFD) feeding cause metabolic inflammation, disrupted signaling of metabolic hormones, netrin-1, and neurogenic factors, neonatal obesity, and defective neuronal development in animal models; however, the mechanism is unclear. Within the hypothalamus and other brain areas, there exists a wide range of interconnected neuronal populations that regulate various aspects of feeding. However, this review aims to discuss how perinatal metabolic inflammation influences the development of POMC and AGRP neurons within the hypothalamus.
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Affiliation(s)
- Rahim Ullah
- Department of Endocrinology, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang, 310052, China; Institute of Neuroscience, NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, Zhejiang University School of Brain Science and Brain Medicine, Hangzhou, China
| | - Yi Shen
- Institute of Neuroscience, NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, Zhejiang University School of Brain Science and Brain Medicine, Hangzhou, China.
| | - Yu-Dong Zhou
- Institute of Neuroscience, NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, Zhejiang University School of Brain Science and Brain Medicine, Hangzhou, China.
| | - Junfen Fu
- Department of Endocrinology, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang, 310052, China.
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16
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Baechle JJ, Chen N, Makhijani P, Winer S, Furman D, Winer DA. Chronic inflammation and the hallmarks of aging. Mol Metab 2023; 74:101755. [PMID: 37329949 PMCID: PMC10359950 DOI: 10.1016/j.molmet.2023.101755] [Citation(s) in RCA: 28] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/30/2023] [Accepted: 06/13/2023] [Indexed: 06/19/2023] Open
Abstract
BACKGROUND Recently, the hallmarks of aging were updated to include dysbiosis, disabled macroautophagy, and chronic inflammation. In particular, the low-grade chronic inflammation during aging, without overt infection, is defined as "inflammaging," which is associated with increased morbidity and mortality in the aging population. Emerging evidence suggests a bidirectional and cyclical relationship between chronic inflammation and the development of age-related conditions, such as cardiovascular diseases, neurodegeneration, cancer, and frailty. How the crosstalk between chronic inflammation and other hallmarks of aging underlies biological mechanisms of aging and age-related disease is thus of particular interest to the current geroscience research. SCOPE OF REVIEW This review integrates the cellular and molecular mechanisms of age-associated chronic inflammation with the other eleven hallmarks of aging. Extra discussion is dedicated to the hallmark of "altered nutrient sensing," given the scope of Molecular Metabolism. The deregulation of hallmark processes during aging disrupts the delicate balance between pro-inflammatory and anti-inflammatory signaling, leading to a persistent inflammatory state. The resultant chronic inflammation, in turn, further aggravates the dysfunction of each hallmark, thereby driving the progression of aging and age-related diseases. MAIN CONCLUSIONS The crosstalk between chronic inflammation and other hallmarks of aging results in a vicious cycle that exacerbates the decline in cellular functions and promotes aging. Understanding this complex interplay will provide new insights into the mechanisms of aging and the development of potential anti-aging interventions. Given their interconnectedness and ability to accentuate the primary elements of aging, drivers of chronic inflammation may be an ideal target with high translational potential to address the pathological conditions associated with aging.
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Affiliation(s)
- Jordan J Baechle
- Buck Artificial Intelligence Platform, the Buck Institute for Research on Aging, Novato, CA, USA
| | - Nan Chen
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada; Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON, Canada
| | - Priya Makhijani
- Buck Artificial Intelligence Platform, the Buck Institute for Research on Aging, Novato, CA, USA; Department of Immunology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Shawn Winer
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - David Furman
- Buck Artificial Intelligence Platform, the Buck Institute for Research on Aging, Novato, CA, USA; Stanford 1000 Immunomes Project, Stanford University School of Medicine, Stanford, CA, USA; Instituto de Investigaciones en Medicina Traslacional (IIMT), Universidad Austral, CONICET, Pilar, Argentina.
| | - Daniel A Winer
- Buck Artificial Intelligence Platform, the Buck Institute for Research on Aging, Novato, CA, USA; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada; Department of Immunology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON, Canada; Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA.
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17
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Spindler M, Palombo M, Zhang H, Thiel CM. Dysfunction of the hypothalamic-pituitary adrenal axis and its influence on aging: the role of the hypothalamus. Sci Rep 2023; 13:6866. [PMID: 37105986 PMCID: PMC10140145 DOI: 10.1038/s41598-023-33922-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 04/20/2023] [Indexed: 04/29/2023] Open
Abstract
As part of the hypothalamic-pituitary adrenal (HPA) axis, the hypothalamus exerts pivotal influence on metabolic and endocrine homeostasis. With age, these processes are subject to considerable change, resulting in increased prevalence of physical disability and cardiac disorders. Yet, research on the aging human hypothalamus is lacking. To assess detailed hypothalamic microstructure in middle adulthood, 39 healthy participants (35-65 years) underwent comprehensive structural magnetic resonance imaging. In addition, we studied HPA axis dysfunction proxied by hair cortisol and waist circumference as potential risk factors for hypothalamic alterations. We provide first evidence of regionally different hypothalamic microstructure, with age effects in its anterior-superior subunit, a critical area for HPA axis regulation. Further, we report that waist circumference was related to increased free water and decreased iron content in this region. In age, hair cortisol was additionally associated with free water content, such that older participants with higher cortisol levels were more vulnerable to free water content increase than younger participants. Overall, our results suggest no general age-related decline in hypothalamic microstructure. Instead, older individuals could be more susceptible to risk factors of hypothalamic decline especially in the anterior-superior subregion, including HPA axis dysfunction, indicating the importance of endocrine and stress management in age.
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Affiliation(s)
- Melanie Spindler
- Biological Psychology, Department of Psychology, School of Medicine and Health Sciences, Carl von Ossietzky Universität Oldenburg, 26129, Oldenburg, Germany.
- Cluster of Excellence "Hearing4all", Carl Von Ossietzky Universität Oldenburg, 26129, Oldenburg, Germany.
| | - Marco Palombo
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology & School of Computer Science and Informatics, Cardiff University, Cardiff, UK
| | - Hui Zhang
- Department of Computer Science and Centre for Medical Image Computing (CMIC), University College London (UCL), London, UK
| | - Christiane M Thiel
- Biological Psychology, Department of Psychology, School of Medicine and Health Sciences, Carl von Ossietzky Universität Oldenburg, 26129, Oldenburg, Germany
- Cluster of Excellence "Hearing4all", Carl Von Ossietzky Universität Oldenburg, 26129, Oldenburg, Germany
- Research Centre Neurosensory Science, Carl von Ossietzky Universität Oldenburg, 26129, Oldenburg, Germany
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18
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Leng L, Yuan Z, Su X, Chen Z, Yang S, Chen M, Zhuang K, Lin H, Sun H, Li H, Xue M, Xu J, Yan J, Chen Z, Yuan T, Zhang J. Hypothalamic Menin regulates systemic aging and cognitive decline. PLoS Biol 2023; 21:e3002033. [PMID: 36928253 PMCID: PMC10019680 DOI: 10.1371/journal.pbio.3002033] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 02/09/2023] [Indexed: 03/18/2023] Open
Abstract
Aging is a systemic process, which is a risk factor for impaired physiological functions, and finally death. The molecular mechanisms driving aging process and the associated cognitive decline are not fully understood. The hypothalamus acts as the arbiter that orchestrates systemic aging through neuroinflammatory signaling. Our recent findings revealed that Menin plays important roles in neuroinflammation and brain development. Here, we found that the hypothalamic Menin signaling diminished in aged mice, which correlates with systemic aging and cognitive deficits. Restoring Menin expression in ventromedial nucleus of hypothalamus (VMH) of aged mice extended lifespan, improved learning and memory, and ameliorated aging biomarkers, while inhibiting Menin in VMH of middle-aged mice induced premature aging and accelerated cognitive decline. We further found that Menin epigenetically regulates neuroinflammatory and metabolic pathways, including D-serine metabolism. Aging-associated Menin reduction led to impaired D-serine release by VMH-hippocampus neural circuit, while D-serine supplement rescued cognitive decline in aged mice. Collectively, VMH Menin serves as a key regulator of systemic aging and aging-related cognitive decline.
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Affiliation(s)
- Lige Leng
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
- * E-mail: (LL); (JZ)
| | - Ziqi Yuan
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Xiao Su
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Zhenlei Chen
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Shangchen Yang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Meiqin Chen
- College of Basic Medicine, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Kai Zhuang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Hui Lin
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Hao Sun
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Huifang Li
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Maoqiang Xue
- Department of Basic Medical Science, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Jun Xu
- Institute for AI in Medicine, School of Automation, Nanjing University of Information Science and Technology, Nanjing, China
| | - Jingqi Yan
- Center for Gene Regulation in Health and Disease, Cleveland State University, Cleveland, Ohio, United States of America
| | - Zhenyi Chen
- Department of Anesthesiology, First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China
| | - Tifei Yuan
- Shanghai Mental Health Center, Shanghai Jiaotong University School of Medicine, Shanghai China
| | - Jie Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian, China
- Department of Anesthesiology, First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China
- * E-mail: (LL); (JZ)
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19
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Stacpoole PW, McCall CE. The pyruvate dehydrogenase complex: Life's essential, vulnerable and druggable energy homeostat. Mitochondrion 2023; 70:59-102. [PMID: 36863425 DOI: 10.1016/j.mito.2023.02.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 01/30/2023] [Accepted: 02/13/2023] [Indexed: 03/04/2023]
Abstract
Found in all organisms, pyruvate dehydrogenase complexes (PDC) are the keystones of prokaryotic and eukaryotic energy metabolism. In eukaryotic organisms these multi-component megacomplexes provide a crucial mechanistic link between cytoplasmic glycolysis and the mitochondrial tricarboxylic acid (TCA) cycle. As a consequence, PDCs also influence the metabolism of branched chain amino acids, lipids and, ultimately, oxidative phosphorylation (OXPHOS). PDC activity is an essential determinant of the metabolic and bioenergetic flexibility of metazoan organisms in adapting to changes in development, nutrient availability and various stresses that challenge maintenance of homeostasis. This canonical role of the PDC has been extensively probed over the past decades by multidisciplinary investigations into its causal association with diverse physiological and pathological conditions, the latter making the PDC an increasingly viable therapeutic target. Here we review the biology of the remarkable PDC and its emerging importance in the pathobiology and treatment of diverse congenital and acquired disorders of metabolic integration.
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Affiliation(s)
- Peter W Stacpoole
- Department of Medicine (Division of Endocrinology, Metabolism and Diabetes), and Department of Biochemistry and Molecular Biology, University of Florida, College of Medicine, Gainesville, FL, United States.
| | - Charles E McCall
- Department of Internal Medicine and Translational Sciences, and Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC, United States
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20
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Calcaterra V, Magenes VC, Hruby C, Siccardo F, Mari A, Cordaro E, Fabiano V, Zuccotti G. Links between Childhood Obesity, High-Fat Diet, and Central Precocious Puberty. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10020241. [PMID: 36832370 PMCID: PMC9954755 DOI: 10.3390/children10020241] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/24/2023] [Accepted: 01/28/2023] [Indexed: 01/31/2023]
Abstract
In recent years, the existing relationship between excess overweight and central precocious puberty (CPP) has been reported, especially in girls. Different nutritional choices have been associated with different patterns of puberty. In particular, the involvement of altered biochemical and neuroendocrine pathways and a proinflammatory status has been described in connection with a high-fat diet (HFD). In this narrative review, we present an overview on the relationship between obesity and precocious pubertal development, focusing on the role of HFDs as a contributor to activating the hypothalamus-pituitary-gonadal axis. Although evidence is scarce and studies limited, especially in the paediatric field, the harm of HFDs on PP is a relevant problem that cannot be ignored. Increased knowledge about HFD effects will be useful in developing strategies preventing precocious puberty in children with obesity. Promoting HFD-avoiding behavior may be useful in preserving children's physiological development and protecting reproductive health. Controlling HFDs may represent a target for policy action to improve global health.
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Affiliation(s)
- Valeria Calcaterra
- Department of Internal Medicine, University of Pavia, 27100 Pavia, Italy
- Pediatric Department, Buzzi Children’s Hospital, 20154 Milano, Italy
- Correspondence:
| | | | - Chiara Hruby
- Pediatric Department, Buzzi Children’s Hospital, 20154 Milano, Italy
| | | | - Alessandra Mari
- Pediatric Department, Buzzi Children’s Hospital, 20154 Milano, Italy
| | - Erika Cordaro
- Pediatric Department, Buzzi Children’s Hospital, 20154 Milano, Italy
| | - Valentina Fabiano
- Pediatric Department, Buzzi Children’s Hospital, 20154 Milano, Italy
- Department of Biomedical and Clinical Science “L. Sacco”, University of Milano, 20157 Milano, Italy
| | - Gianvincenzo Zuccotti
- Pediatric Department, Buzzi Children’s Hospital, 20154 Milano, Italy
- Department of Biomedical and Clinical Science “L. Sacco”, University of Milano, 20157 Milano, Italy
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21
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Lama A, Del Piano F, Annunziata C, Comella F, Opallo N, Melini S, Grumetto L, Pirozzi C, Mattace Raso G, Meli R, Ferrante MC. Bisphenol A exacerbates anxiety-like behavior and neuroinflammation in prefrontal cortex of adult obese mice. Life Sci 2023; 313:121301. [PMID: 36535405 DOI: 10.1016/j.lfs.2022.121301] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
AIMS Bisphenol A (BPA) is an endocrine-disrupting chemical inducing several damages such as neurotoxicity, immunotoxicity, and metabolic disorders. Obesity is the main risk factor for the increased occurrence of metabolic alterations as well as mood disorders. Here, we investigated in obese mice the effects of BPA on anxiety-like behavior, associated with neuroinflammation and immune activation. MAIN METHODS Male C57Bl/6J mice were divided into 4 groups: control group (STD) receiving chow diet and BPA vehicle; STD group treated with BPA (50 μg/kg/die); high-fat diet (HFD) group receiving BPA vehicle; HFD group treated with BPA. BPA treatment started 12 weeks after HFD feeding and lasted 3 weeks. KEY FINDINGS The open field and elevated plus-maze tests showed in HFD + BPA group the worsening of HFD-induced anxiety-like behavior. The anxiogenic effects of BPA also emerged from hyperactivation of the hypothalamus-pituitary-adrenal gland axis, determined by the increased transcription of Crh and its receptor in the prefrontal cortex (PFC). Furthermore, BPA activated NLRP3 inflammasome and exacerbated the neuroinflammation induced by HFD, increasing IL-1β, TNF-α and monocyte chemoattractant protein (MCP)-1 in PFC. Furthermore, it induced inflammation and monocyte recruitment in hypothalamus and amygdala. Contextually, BPA significantly amplified the immune activation caused by lipid overload as evidenced by the increased expression of TLR-4 and MCP-1 in the PFC and triggered mastocytosis in the hypothalamus rather than STD mice. SIGNIFICANCE All these data show that sub-chronic BPA exposure represents an additional risk factor for mood disorders strictly related to obesity, enhancing neuroinflammation and immune activation triggered by HFD feeding.
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Affiliation(s)
- A Lama
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - F Del Piano
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy
| | - C Annunziata
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - F Comella
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - N Opallo
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - S Melini
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - L Grumetto
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - C Pirozzi
- Department of Pharmacy, University of Naples Federico II, Naples, Italy.
| | - G Mattace Raso
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - R Meli
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - M C Ferrante
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy
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22
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Anti-Inflammatory and Antioxidative Phytogenic Substances against Secret Killers in Poultry: Current Status and Prospects. Vet Sci 2023; 10:vetsci10010055. [PMID: 36669057 PMCID: PMC9866488 DOI: 10.3390/vetsci10010055] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 11/19/2022] [Accepted: 01/04/2023] [Indexed: 01/17/2023] Open
Abstract
Chronic stress is recognized as a secret killer in poultry. It is associated with systemic inflammation due to cytokine release, dysbiosis, and the so-called leaky gut syndrome, which mainly results from oxidative stress reactions that damage the barrier function of the cells lining the gut wall. Poultry, especially the genetically selected broiler breeds, frequently suffer from these chronic stress symptoms when exposed to multiple stressors in their growing environments. Since oxidative stress reactions and inflammatory damages are multi-stage and long-term processes, overshooting immune reactions and their down-stream effects also negatively affect the animal's microbiota, and finally impair its performance and commercial value. Means to counteract oxidative stress in poultry and other animals are, therefore, highly welcome. Many phytogenic substances, including flavonoids and phenolic compounds, are known to exert anti-inflammatory and antioxidant effects. In this review, firstly, the main stressors in poultry, such as heat stress, mycotoxins, dysbiosis and diets that contain oxidized lipids that trigger oxidative stress and inflammation, are discussed, along with the key transcription factors involved in the related signal transduction pathways. Secondly, the most promising phytogenic substances and their current applications to ameliorate oxidative stress and inflammation in poultry are highlighted.
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23
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Liu Y, Guo YF, Peng H, Zhou HY, Su T, Yang M, Guo Q, Ye X, Huang Y, Jiang TJ. Hypothalamic Hnscr regulates glucose balance by mediating central inflammation and insulin signal. Cell Prolif 2023; 56:e13332. [PMID: 36042571 DOI: 10.1111/cpr.13332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/15/2022] [Accepted: 08/17/2022] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVES Hypothalamic dysfunction leads to glucose metabolic imbalance; however, the mechanisms still need clarification. Our current study was to explore the role of hypothalamic Hnscr in glucose metabolism. MATERIALS AND METHODS Using Hnscr knockout or htNSC-specific Hnscr overexpression mice, we evaluated the effects of Hnscr on glucose metabolism through GTTs, ITTs, serum indicator measurements, etc. Immunofluorescence staining and Western blotting were performed to test inflammation levels and insulin signalling in hypothalamus. Conditioned medium intervene were used to investigate the effects of htNSCs on neuronal cell line. We also detected the glucose metabolism of mice with htNSCs implantation. RESULTS Hnscr expression decreased in the hypothalamus after high-fat diet feed. Hnscr-null mice displayed aggravated systematic insulin resistance, while mice with htNSC-specific Hnscr overexpression had the opposite phenotype. Notably, Hnscr-null mice had increased NF-κB signal in htNSCs, along with enhanced inflammation and damaged insulin signal in neurons located in arcuate nucleus of hypothalamus. The secretions, including sEVs, of Hnscr-deficient htNSCs mediated the detrimental effects on the CNS cell line. Locally implantation with Hnscr-depleted htNSCs disrupted glucose homeostasis. CONCLUSIONS This study demonstrated that decreased Hnscr in htNSCs led to systematic glucose imbalance through activating NF-κB signal and dampening insulin signal in hypothalamic neurons.
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Affiliation(s)
- Ya Liu
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Yi-Fan Guo
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Hui Peng
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Hai-Yan Zhou
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Tian Su
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Mi Yang
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Qi Guo
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Xiao Ye
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Yan Huang
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Tie-Jian Jiang
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, Hunan, China
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24
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Khan MM. Role of de novo lipogenesis in insulin resistance in first-episode psychosis and therapeutic options. Neurosci Biobehav Rev 2022; 143:104919. [DOI: 10.1016/j.neubiorev.2022.104919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 10/07/2022] [Accepted: 10/15/2022] [Indexed: 11/06/2022]
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25
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Sovrani V, Bobermin LD, Santos CL, Brondani M, Gonçalves CA, Leipnitz G, Quincozes-Santos A. Effects of long-term resveratrol treatment in hypothalamic astrocyte cultures from aged rats. Mol Cell Biochem 2022; 478:1205-1216. [PMID: 36272012 DOI: 10.1007/s11010-022-04585-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 10/11/2022] [Indexed: 11/28/2022]
Abstract
Aging is intrinsically related to metabolic changes and characterized by the accumulation of oxidative and inflammatory damage, as well as alterations in gene expression and activity of several signaling pathways, which in turn impact on homeostatic responses of the body. Hypothalamus is a brain region most related to these responses, and increasing evidence has highlighted a critical role of astrocytes in hypothalamic homeostatic functions, particularly during aging process. The purpose of this study was to investigate the in vitro effects of a chronic treatment with resveratrol (1 µM during 15 days, which was replaced once every 3 days), a recognized anti-inflammatory and antioxidant molecule, in primary hypothalamic astrocyte cultures obtained from aged rats (24 months old). We observed that aging process changes metabolic, oxidative, inflammatory, and senescence parameters, as well as glial markers, while long-term resveratrol treatment prevented these effects. In addition, resveratrol upregulated key signaling pathways associated with cellular homeostasis, including adenosine receptors, nuclear factor erythroid-derived 2-like 2 (Nrf2), heme oxygenase 1 (HO-1), sirtuin 1 (SIRT1), proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), and phosphoinositide 3-kinase (PI3K). Our data corroborate the glioprotective effect of resveratrol in aged hypothalamic astrocytes, reinforcing the beneficial role of resveratrol in the aging process.
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Affiliation(s)
- Vanessa Sovrani
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Larissa Daniele Bobermin
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Camila Leite Santos
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Morgana Brondani
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Carlos-Alberto Gonçalves
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600 - Anexo, Bairro Santa Cecília, Porto Alegre, RS, 90035-003, Brazil
| | - Guilhian Leipnitz
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600 - Anexo, Bairro Santa Cecília, Porto Alegre, RS, 90035-003, Brazil
| | - André Quincozes-Santos
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600 - Anexo, Bairro Santa Cecília, Porto Alegre, RS, 90035-003, Brazil.
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26
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Martín MG, Dotti CG. Plasma membrane and brain dysfunction of the old: Do we age from our membranes? Front Cell Dev Biol 2022; 10:1031007. [PMID: 36274849 PMCID: PMC9582647 DOI: 10.3389/fcell.2022.1031007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 09/20/2022] [Indexed: 11/26/2022] Open
Abstract
One of the characteristics of aging is a gradual hypo-responsiveness of cells to extrinsic stimuli, mainly evident in the pathways that are under hormone control, both in the brain and in peripheral tissues. Age-related resistance, i.e., reduced response of receptors to their ligands, has been shown to Insulin and also to leptin, thyroid hormones and glucocorticoids. In addition, lower activity has been reported in aging for ß-adrenergic receptors, adenosine A2B receptor, and several other G-protein-coupled receptors. One of the mechanisms proposed to explain the loss of sensitivity to hormones and neurotransmitters with age is the loss of receptors, which has been observed in several tissues. Another mechanism that is finding more and more experimental support is related to the changes that occur with age in the lipid composition of the neuronal plasma membrane, which are responsible for changes in the receptors’ coupling efficiency to ligands, signal attenuation and pathway desensitization. In fact, recent works have shown that altered membrane composition—as occurs during neuronal aging—underlies reduced response to glutamate, to the neurotrophin BDNF, and to insulin, all these leading to cognition decay and epigenetic alterations in the old. In this review we present evidence that altered functions of membrane receptors due to altered plasma membrane properties may be a triggering factor in physiological decline, decreased brain function, and increased vulnerability to neuropathology in aging.
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Affiliation(s)
- Mauricio G. Martín
- Cellular and Molecular Neurobiology Department, Instituto Ferreyra (INIMEC)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Córdoba (UNC), Córdoba, Argentina
- *Correspondence: Mauricio G. Martín, ; Carlos G. Dotti,
| | - Carlos G. Dotti
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas (CSIC), Universidad Autónoma de Madrid (UAM), Madrid, Spain
- *Correspondence: Mauricio G. Martín, ; Carlos G. Dotti,
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27
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Butler T, Glodzik L, Wang XH, Xi K, Li Y, Pan H, Zhou L, Chiang GCY, Morim S, Wickramasuriya N, Tanzi E, Maloney T, Harvey P, Mao X, Razlighi QR, Rusinek H, Shungu DC, de Leon M, Atwood CS, Mozley PD. Positron Emission Tomography reveals age-associated hypothalamic microglial activation in women. Sci Rep 2022; 12:13351. [PMID: 35922659 PMCID: PMC9349172 DOI: 10.1038/s41598-022-17315-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 07/25/2022] [Indexed: 11/25/2022] Open
Abstract
In rodents, hypothalamic inflammation plays a critical role in aging and age-related diseases. Hypothalamic inflammation has not previously been assessed in vivo in humans. We used Positron Emission Tomography (PET) with a radiotracer sensitive to the translocator protein (TSPO) expressed by activated microglia, to assess correlations between age and regional brain TSPO in a group of healthy subjects (n = 43, 19 female, aged 23-78), focusing on hypothalamus. We found robust age-correlated TSPO expression in thalamus but not hypothalamus in the combined group of women and men. This pattern differs from what has been described in rodents. Prominent age-correlated TSPO expression in thalamus in humans, but in hypothalamus in rodents, could reflect evolutionary changes in size and function of thalamus versus hypothalamus, and may be relevant to the appropriateness of using rodents to model human aging. When examining TSPO PET results in women and men separately, we found that only women showed age-correlated hypothalamic TSPO expression. We suggest this novel result is relevant to understanding a stark sex difference in human aging: that only women undergo loss of fertility-menopause-at mid-life. Our finding of age-correlated hypothalamic inflammation in women could have implications for understanding and perhaps altering reproductive aging in women.
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Affiliation(s)
- Tracy Butler
- Department of Radiology, Weill Cornell Medicine, New York, USA.
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA.
| | - Lidia Glodzik
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Xiuyuan Hugh Wang
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Ke Xi
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Yi Li
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Hong Pan
- Department of Psychiatry, Brigham and Women's Hospital, Boston, USA
| | - Liangdong Zhou
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | | | - Simon Morim
- Department of Radiology, Weill Cornell Medicine, New York, USA
| | - Nimmi Wickramasuriya
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Emily Tanzi
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Thomas Maloney
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Patrick Harvey
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Xiangling Mao
- Department of Radiology, Weill Cornell Medicine, New York, USA
| | - Qolamreza Ray Razlighi
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Henry Rusinek
- Department of Radiology, New York University, New York, USA
| | - Dikoma C Shungu
- Department of Radiology, Weill Cornell Medicine, New York, USA
| | - Mony de Leon
- Department of Radiology, Weill Cornell Medicine, New York, USA
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, 405 E 61st St, New York, NY, 10065, USA
| | - Craig S Atwood
- Department of Gerontology, University of Wisconsin, Madison, Madison, USA
| | - P David Mozley
- Department of Radiology, Weill Cornell Medicine, New York, USA
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28
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Diet-induced inflammation in the anterior paraventricular thalamus induces compulsive sucrose-seeking. Nat Neurosci 2022; 25:1009-1013. [PMID: 35915173 DOI: 10.1038/s41593-022-01129-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/22/2022] [Indexed: 11/08/2022]
Abstract
Overconsumption of palatable food may initiate neuroadaptive responses in brain reward circuitry that may contribute to eating disorders. Here we report that high-fat diet (HFD) consumption impedes threat-cue-induced suppression of sucrose-seeking in mice. This compulsive sucrose-seeking was due to enhanced cue-triggered neuronal activity in the anterior paraventricular thalamus (aPVT) resulting from HFD-induced microglia activation. Thus, metabolic inflammation in the aPVT produces an adaptive response to threat cues, leading to compulsive food-seeking.
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29
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Cross-Talk between the Cytokine IL-37 and Thyroid Hormones in Modulating Chronic Inflammation Associated with Target Organ Damage in Age-Related Metabolic and Vascular Conditions. Int J Mol Sci 2022; 23:ijms23126456. [PMID: 35742902 PMCID: PMC9224418 DOI: 10.3390/ijms23126456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 02/04/2023] Open
Abstract
Chronic inflammation is considered to be the main mechanism contributing to the development of age-related metabolic and vascular conditions. The phases of chronic inflammation that mediate the progression of target organ damage in these conditions are poorly known, however. In particular, there is a paucity of data on the link between chronic inflammation and metabolic disorders. Based on some of our own results and recent developments in our understanding of age-related inflammation as a whole-body response, we discuss the hypothesis that cross-talk between the cytokine IL-37 and thyroid hormones could be the key regulatory mechanism that justifies the metabolic effects of chronic tissue-related inflammation. The cytokine IL-37 is emerging as a strong natural suppressor of the chronic innate immune response. The effect of this cytokine has been identified in reversing metabolic costs of chronic inflammation. Thyroid hormones are known to regulate energy metabolism. There is a close link between thyroid function and inflammation in elderly individuals. Nonlinear associations between IL-37 and thyroid hormones, considered within the wider clinical context, can improve our understanding of the phases of chronic inflammation that are associated with target organ damage in age-related metabolic and vascular conditions.
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30
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Liu T, Xu Y, Yi CX, Tong Q, Cai D. The hypothalamus for whole-body physiology: from metabolism to aging. Protein Cell 2022; 13:394-421. [PMID: 33826123 PMCID: PMC9095790 DOI: 10.1007/s13238-021-00834-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 03/01/2021] [Indexed: 01/05/2023] Open
Abstract
Obesity and aging are two important epidemic factors for metabolic syndrome and many other health issues, which contribute to devastating diseases such as cardiovascular diseases, stroke and cancers. The brain plays a central role in controlling metabolic physiology in that it integrates information from other metabolic organs, sends regulatory projections and orchestrates the whole-body function. Emerging studies suggest that brain dysfunction in sensing various internal cues or processing external cues may have profound effects on metabolic and other physiological functions. This review highlights brain dysfunction linked to genetic mutations, sex, brain inflammation, microbiota, stress as causes for whole-body pathophysiology, arguing brain dysfunction as a root cause for the epidemic of aging and obesity-related disorders. We also speculate key issues that need to be addressed on how to reveal relevant brain dysfunction that underlines the development of these disorders and diseases in order to develop new treatment strategies against these health problems.
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Affiliation(s)
- Tiemin Liu
- grid.8547.e0000 0001 0125 2443State Key Laboratory of Genetic Engineering, Department of Endocrinology and Metabolism, Institute of Metabolism and Integrative Biology, Human Phenome Institute, and Collaborative Innovation Center for Genetics and Development, Zhongshan Hospital, School of Life Sciences, Fudan University, Shanghai, 200438 China
| | - Yong Xu
- grid.39382.330000 0001 2160 926XChildren’s Nutrition Research Center, Department of Pediatrics, Department of Molecular and Cellular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030 USA
| | - Chun-Xia Yi
- grid.7177.60000000084992262Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, Meibergdreef 9, 1105AZ Amsterdam, Netherlands
| | - Qingchun Tong
- grid.453726.10000 0004 5906 7293Brown Foundation Institute of Molecular Medicine, Department of Neurobiology and Anatomy, University of Texas McGovern Medical School, Graduate Program in Neuroscience of MD Anderson UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030 USA
| | - Dongsheng Cai
- grid.251993.50000000121791997Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York, NY 10461 USA
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31
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Kaneko K, Takekuma Y, Goto T, Ohinata K. An orally active plant Rubisco-derived peptide increases neuronal leptin responsiveness. Sci Rep 2022; 12:8599. [PMID: 35597815 PMCID: PMC9124197 DOI: 10.1038/s41598-022-12595-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 05/13/2022] [Indexed: 11/25/2022] Open
Abstract
Nutrient excess, such as the intake of a high-fat diet, reduces hypothalamic responses to exogenously administered leptin and induces dietary obesity; however, orally active components that attenuate neural leptin dysregulation have yet to be identified. We herein demonstrated that YHIEPV, derived from the pepsin-pancreatin digestion of the green leaf protein Rubisco, increased the leptin-induced phosphorylation of STAT3 in ex vivo hypothalamic slice cultures. We also showed that YHIEPV mitigated palmitic acid-induced decreases in leptin responsiveness. Furthermore, orally administered YHIEPV promoted leptin-induced reductions in body weight and food intake in obese mice. In addition, dietary-induced body weight gain was significantly less in mice orally or centrally administered YHIEPV daily than in saline-control mice. Cellular leptin sensitivity and the levels of proinflammatory-related factors, such as IL1β and Socs-3, in the hypothalamus of obese mice were also restored by YHIEPV. YHIEPV blocked cellular leptin resistance induced by forskolin, which activates Epac-Rap1 signaling, and reduced the level of the GTP-bound active form of Rap1 in the brains of obese mice. Collectively, the present results demonstrated that the orally active peptide YHIEPV derived from a major green leaf protein increased neural leptin responsiveness and reduced body weight gain in mice with dietary obesity.
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Affiliation(s)
- Kentaro Kaneko
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan. .,Department of Agricultural Chemistry, School of Agriculture, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki-shi, Kanagawa, 214-8571, Japan.
| | - Yukihiro Takekuma
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Tsuyoshi Goto
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Kousaku Ohinata
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.
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32
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The central nervous system control of energy homeostasis: high fat diet induced hypothalamic microinflammation and obesity. Brain Res Bull 2022; 185:99-106. [PMID: 35525336 DOI: 10.1016/j.brainresbull.2022.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 04/27/2022] [Accepted: 04/30/2022] [Indexed: 11/22/2022]
Abstract
Obesity is believed to arise through the imbalance of energy homeostasis controlled by the central nervous system, where the hypothalamus plays the fundamental role in energy metabolism. In this review, we will provide an overview regarding the functions of POMC neurons and AgRP neurons in acute nucleus of the hypothalamus which mediated the energy metabolism, highlighting their interactions with peripheral organs derived hormones in control of energy homeostasis. Furthermore, the role of high fat diet induced hypothalamic microinflammation in the pathogenesis of obesity will be discussed. We hope this review could help researchers to understand the mechanism of hypothalamus in control of energy metabolism, and design related drugs to block the pathways involving in the impaired metabolism in obese patients.
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33
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Lama A, Pirozzi C, Severi I, Morgese MG, Senzacqua M, Annunziata C, Comella F, Del Piano F, Schiavone S, Petrosino S, Mollica MP, Diano S, Trabace L, Calignano A, Giordano A, Mattace Raso G, Meli R. Palmitoylethanolamide dampens neuroinflammation and anxiety-like behavior in obese mice. Brain Behav Immun 2022; 102:110-123. [PMID: 35176443 PMCID: PMC10662208 DOI: 10.1016/j.bbi.2022.02.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 02/01/2022] [Accepted: 02/04/2022] [Indexed: 12/11/2022] Open
Abstract
High-fat diet (HFD) consumption leads to obesity and a chronic state of low-grade inflammation, named metainflammation. Notably, metainflammation contributes to neuroinflammation due to the increased levels of circulating free fatty acids and cytokines. It indicates a strict interplay between peripheral and central counterparts in the pathogenic mechanisms of obesity-related mood disorders. In this context, the impairment of internal hypothalamic circuitry runs in tandem with the alteration of other brain areas associated with emotional processing (i.e., hippocampus and amygdala). Palmitoylethanolamide (PEA), an endogenous lipid mediator belonging to the N-acylethanolamines family, has been extensively studied for its pleiotropic effects both at central and peripheral level. Our study aimed to elucidate PEA capability in limiting obesity-induced anxiety-like behavior and neuroinflammation-related features in an experimental model of HFD-fed obese mice. PEA treatment promoted an improvement in anxiety-like behavior of obese mice and the systemic inflammation, reducing serum pro-inflammatory mediators (i.e., TNF-α, IL-1β, MCP-1, LPS). In the amygdala, PEA increased dopamine turnover, as well as GABA levels. PEA also counteracted the overactivation of HPA axis, reducing the expression of hypothalamic corticotropin-releasing hormone and its type 1 receptor. Moreover, PEA attenuated the immunoreactivity of Iba-1 and GFAP and reduced pro-inflammatory pathways and cytokine production in both the hypothalamus and hippocampus. This finding, together with the reduced transcription of mast cell markers (chymase 1 and tryptase β2) in the hippocampus, indicated the weakening of immune cell activation underlying the neuroprotective effect of PEA. Obesity-driven neuroinflammation was also associated with the disruption of blood-brain barrier (BBB) in the hippocampus. PEA limited the albumin extravasation and restored tight junction transcription modified by HFD. To gain mechanistic insight, we designed an in vitro model of metabolic injury using human neuroblastoma SH-SY5Y cells insulted by a mix of glucosamine and glucose. Here, PEA directly counteracted inflammation and mitochondrial dysfunction in a PPAR-α-dependent manner since the pharmacological blockade of the receptor reverted its effects. Our results strengthen the therapeutic potential of PEA in obesity-related neuropsychiatric comorbidities, controlling neuroinflammation, BBB disruption, and neurotransmitter imbalance involved in behavioral dysfunctions.
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Affiliation(s)
- Adriano Lama
- Department of Pharmacy, School of Medicine, University of Naples Federico II, Via Domenico Montesano, 49 - 80131 Naples, Italy
| | - Claudio Pirozzi
- Department of Pharmacy, School of Medicine, University of Naples Federico II, Via Domenico Montesano, 49 - 80131 Naples, Italy
| | - Ilenia Severi
- Department of Experimental and Clinical Medicine, Marche Polytechnic University, Via Tronto, 10, A - 60020 Ancona, Italy
| | - Maria Grazia Morgese
- Department of Clinical and Experimental Medicine, University of Foggia, Via Napoli, 20 - 71122 Foggia, Italy
| | - Martina Senzacqua
- Department of Experimental and Clinical Medicine, Marche Polytechnic University, Via Tronto, 10, A - 60020 Ancona, Italy
| | - Chiara Annunziata
- Department of Pharmacy, School of Medicine, University of Naples Federico II, Via Domenico Montesano, 49 - 80131 Naples, Italy
| | - Federica Comella
- Department of Pharmacy, School of Medicine, University of Naples Federico II, Via Domenico Montesano, 49 - 80131 Naples, Italy
| | - Filomena Del Piano
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via Delpino 1, 80137 Naples, Italy
| | - Stefania Schiavone
- Department of Clinical and Experimental Medicine, University of Foggia, Via Napoli, 20 - 71122 Foggia, Italy
| | - Stefania Petrosino
- Endocannabinoid Research Group, Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Napoli, Italy
| | - Maria Pina Mollica
- Department of Biology, University of Naples Federico II, Complesso Universitario di Monte, Sant'Angelo, Cupa Nuova Cinthia 21 - Edificio 7, 80126 Naples, Italy
| | - Sabrina Diano
- Program in Cell Signaling and Neurobiology of Metabolism, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Comparative Medicine, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Neuroscience, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Luigia Trabace
- Department of Clinical and Experimental Medicine, University of Foggia, Via Napoli, 20 - 71122 Foggia, Italy
| | - Antonio Calignano
- Department of Pharmacy, School of Medicine, University of Naples Federico II, Via Domenico Montesano, 49 - 80131 Naples, Italy
| | - Antonio Giordano
- Department of Experimental and Clinical Medicine, Marche Polytechnic University, Via Tronto, 10, A - 60020 Ancona, Italy
| | - Giuseppina Mattace Raso
- Department of Pharmacy, School of Medicine, University of Naples Federico II, Via Domenico Montesano, 49 - 80131 Naples, Italy.
| | - Rosaria Meli
- Department of Pharmacy, School of Medicine, University of Naples Federico II, Via Domenico Montesano, 49 - 80131 Naples, Italy
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34
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Mate N, Shaji R, Das M, Jain S, Banerjee A. Expression of polyamines and its association with GnRH-I in the hypothalamus during aging in rodent model. Amino Acids 2022; 54:1135-1154. [PMID: 35286462 DOI: 10.1007/s00726-022-03139-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 02/12/2022] [Indexed: 12/28/2022]
Abstract
GnRH-I and GnIH are the key neuropeptides that regulate the hypothalamic-pituitary-gonadal axis in mammals during aging. Polyamines are important aliphatic amines that are expressed in the brain and show variation with aging. The present study demonstrates evidence of variation in the level of expression of polyamines, GnRH-I and GnIH in the hypothalamus of female mice during aging. The study also suggests regulatory effects of polyamines over expression of the hypothalamic GnRH-I. The study shows a significant positive correlation between polyamines, its associated factors and GnRH-I along with significant negative correlation between polyamines, its associated factors and GnIH. This is the first study to report the effect of polyamines along with lactate or TNF-α or both on GnRH-I expression in GT1-7 cell line. TNF-α and lactate significantly decreased hypothalamic GnRH-I mRNA expression in GT1-7 cells when treated for 24 h. Polyamines (putrescine and agmatine) in contrast, significantly increased GnRH-I mRNA expression in GT1-7 cells when treated for 24 h. Also, polyamines increased GnRH-I mRNA expression when treated in presence of TNF-α or lactate thereby suggesting its neuro-protective role. This study also found 3809 differentially expressed genes through RNA-seq done between the hypothalamic GT1-7 cells treated with putrescine only versus TNF-α and putrescine. The present study suggests for the first time that putrescine treatment to TNFα-primed GT1-7 cells upregulates GnRH-I expression via regulation of several pathways such as calcium ion pathway, estrogen signaling, clock genes as well as regulating other metabolic process like neuronal differentiation and neurulation.
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Affiliation(s)
- Nayan Mate
- Department of Biological Sciences, KK Birla, Goa Campus, BITS Pilani, Zuarinagar, Goa, India
| | - Rohit Shaji
- Department of Biological Sciences, KK Birla, Goa Campus, BITS Pilani, Zuarinagar, Goa, India
| | - Moitreyi Das
- Department of Zoology, Goa University, Goa, India
| | - Sammit Jain
- Department of Mathematics, KK Birla, Goa Campus, BITS Pilani, Zuarinagar, Goa, India
| | - Arnab Banerjee
- Department of Biological Sciences, KK Birla, Goa Campus, BITS Pilani, Zuarinagar, Goa, India.
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35
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Soylu-Kucharz R, Khoshnan A, Petersén Å. IKKβ signaling mediates metabolic changes in the hypothalamus of a Huntington disease mouse model. iScience 2022; 25:103771. [PMID: 35146388 PMCID: PMC8819015 DOI: 10.1016/j.isci.2022.103771] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 11/16/2021] [Accepted: 01/11/2022] [Indexed: 01/13/2023] Open
Abstract
Huntington disease (HD) is a neurodegenerative disorder caused by a CAG repeat expansion in the huntingtin (HTT) gene. Metabolic changes are associated with HD progression, but underlying mechanisms are not fully known. As the IKKβ/NF-κB pathway is an essential regulator of metabolism, we investigated the involvement of IKKβ, the upstream activator of NF-κB in hypothalamus-specific HD metabolic changes. We expressed amyloidogenic N-terminal fragments of mutant HTT (mHTT) in the hypothalamus of mice with brain-specific ablation of IKKβ (Nestin/IKKβlox/lox) and control mice (IKKβlox/lox). We assessed effects on body weight, metabolic hormones, and hypothalamic neuropathology. Hypothalamic expression of mHTT led to an obese phenotype only in female mice. CNS-specific inactivation of IKKβ prohibited weight gain in females, which was independent of neuroprotection and microglial activation. Our study suggests that mHTT in the hypothalamus causes metabolic imbalance in a sex-specific fashion, and central inhibition of the IKKβ pathway attenuates the obese phenotype. Mutant huntingtin in the hypothalamus causes sex-specific metabolic imbalance CNS-specific inactivation of the IKKβ pathway prevents the obese phenotype IKKβ inactivation leads to an increased number of mutant huntingtin inclusions IKKβ inactivation does not prevent orexin or A13 TH neuron loss
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Affiliation(s)
- Rana Soylu-Kucharz
- Translational Neuroendocrine Research Unit, Department of Experimental Medical Science, Lund University, BMC D11, 22184 Lund, Sweden
| | - Ali Khoshnan
- California Institute of Technology, Pasadena, CA 91125, USA
| | - Åsa Petersén
- Translational Neuroendocrine Research Unit, Department of Experimental Medical Science, Lund University, BMC D11, 22184 Lund, Sweden
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36
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Engel DF, Velloso LA. The timeline of neuronal and glial alterations in experimental obesity. Neuropharmacology 2022; 208:108983. [PMID: 35143850 DOI: 10.1016/j.neuropharm.2022.108983] [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: 07/02/2021] [Revised: 01/03/2022] [Accepted: 02/02/2022] [Indexed: 12/14/2022]
Abstract
In experimental models, hypothalamic dysfunction is a key component of the pathophysiology of diet-induced obesity. Early after the introduction of a high-fat diet, neurons, microglia, astrocytes and tanycytes of the mediobasal hypothalamus undergo structural and functional changes that impact caloric intake, energy expenditure and systemic glucose tolerance. Inflammation has emerged as a central component of this response, and as in other inflammatory conditions, there is a time course of events that determine the fate of distinct cells involved in the central regulation of whole-body energy homeostasis. Here, we review the work that identified key mechanisms, cellular players and temporal features of diet-induced hypothalamic abnormalities.
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Affiliation(s)
- Daiane F Engel
- School of Pharmacy, Federal University of Ouro Preto, Brazil
| | - Licio A Velloso
- Laboratory of Cell Signaling, Obesity and Comorbidities Research Center, University of Campinas, Brazil.
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37
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Roger C, Lasbleiz A, Guye M, Dutour A, Gaborit B, Ranjeva JP. The Role of the Human Hypothalamus in Food Intake Networks: An MRI Perspective. Front Nutr 2022; 8:760914. [PMID: 35047539 PMCID: PMC8762294 DOI: 10.3389/fnut.2021.760914] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 12/07/2021] [Indexed: 12/12/2022] Open
Abstract
Hypothalamus (HT), this small structure often perceived through the prism of neuroimaging as morphologically and functionally homogeneous, plays a key role in the primitive act of feeding. The current paper aims at reviewing the contribution of magnetic resonance imaging (MRI) in the study of the role of the HT in food intake regulation. It focuses on the different MRI techniques that have been used to describe structurally and functionally the Human HT. The latest advances in HT parcellation as well as perspectives in this field are presented. The value of MRI in the study of eating disorders such as anorexia nervosa (AN) and obesity are also highlighted.
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Affiliation(s)
- Coleen Roger
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Centre National de la Recherche Scientifique (CNRS), Université Aix-Marseille, Marseille, France.,Centre d'Exploration Métabolique par Résonance Magnétique (CEMEREM), Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Universitaire de la Timone, Marseille, France
| | - Adèle Lasbleiz
- Centre d'Exploration Métabolique par Résonance Magnétique (CEMEREM), Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Universitaire de la Timone, Marseille, France.,Département d'Endocrinologie, Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital de la Conception, Marseille, France
| | - Maxime Guye
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Centre National de la Recherche Scientifique (CNRS), Université Aix-Marseille, Marseille, France.,Centre d'Exploration Métabolique par Résonance Magnétique (CEMEREM), Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Universitaire de la Timone, Marseille, France
| | - Anne Dutour
- Département d'Endocrinologie, Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital de la Conception, Marseille, France
| | - Bénédicte Gaborit
- Département d'Endocrinologie, Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital de la Conception, Marseille, France
| | - Jean-Philippe Ranjeva
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Centre National de la Recherche Scientifique (CNRS), Université Aix-Marseille, Marseille, France.,Centre d'Exploration Métabolique par Résonance Magnétique (CEMEREM), Assistance Publique-Hôpitaux de Marseille (AP-HM), Hôpital Universitaire de la Timone, Marseille, France
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38
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Glial Modulation of Energy Balance: The Dorsal Vagal Complex Is No Exception. Int J Mol Sci 2022; 23:ijms23020960. [PMID: 35055143 PMCID: PMC8779587 DOI: 10.3390/ijms23020960] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 02/04/2023] Open
Abstract
The avoidance of being overweight or obese is a daily challenge for a growing number of people. The growing proportion of people suffering from a nutritional imbalance in many parts of the world exemplifies this challenge and emphasizes the need for a better understanding of the mechanisms that regulate nutritional balance. Until recently, research on the central regulation of food intake primarily focused on neuronal signaling, with little attention paid to the role of glial cells. Over the last few decades, our understanding of glial cells has changed dramatically. These cells are increasingly regarded as important neuronal partners, contributing not just to cerebral homeostasis, but also to cerebral signaling. Our understanding of the central regulation of energy balance is part of this (r)evolution. Evidence is accumulating that glial cells play a dynamic role in the modulation of energy balance. In the present review, we summarize recent data indicating that the multifaceted glial compartment of the brainstem dorsal vagal complex (DVC) should be considered in research aimed at identifying feeding-related processes operating at this level.
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39
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Chen ZH, Li S, Xu M, Liu CC, Ye H, Wang B, Wu QF. Single-cell Transcriptomic Profiling of the Hypothalamic Median Eminence during Aging. J Genet Genomics 2022; 49:523-536. [PMID: 35032691 DOI: 10.1016/j.jgg.2022.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/31/2021] [Accepted: 01/03/2022] [Indexed: 10/19/2022]
Abstract
Aging is a slow and progressive natural process that compromises the normal functions of cells, tissues, organs and systems. The aging of the hypothalamic median eminence (ME), a structural gate linking neural and endocrine systems, may impair hormone release, energy homeostasis and central sensing of circulating molecules, leading to systemic and reproductive aging. However, the molecular and cellular features of ME aging remain largely unknown. Here we describe the transcriptional landscape of young and middle-aged mouse ME at single-cell resolution, revealing the common and cell-type-specific transcriptional changes with age. The transcriptional changes in cell-intrinsic programs, cell-cell crosstalk and cell-extrinsic factors highlight five molecular features of ME aging and also implicate several potentially druggable targets at cellular, signaling and molecular levels. Importantly, our results suggest that vascular and leptomeningeal cells (VLMCs) may lead the asynchronized aging process among diverse cell types and drive local inflammation and cellular senescence via a unique secretome. Together, our study uncovers how intrinsic and extrinsic features of each cell type in the hypothalamic ME are changed by the aging process, which will facilitate our understanding of brain aging and provide clues for efficient anti-aging intervention at the middle-aged stage.
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Affiliation(s)
- Zhen-Hua Chen
- State Key Laboratory of Molecular Development Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100101, China
| | - Si Li
- State Key Laboratory of Molecular Development Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100101, China
| | - Mingrui Xu
- State Key Laboratory of Molecular Development Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100101, China
| | - Candace C Liu
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Hongying Ye
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Ben Wang
- Department of Obstetrics and Gynecology, Baoding Second Central Hospital, Baoding, Hebei 072750, China
| | - Qing-Feng Wu
- State Key Laboratory of Molecular Development Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100101, China; Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Beijing 100101, China; Chinese Institute for Brain Research, Beijing 102206, China; Beijing Children's Hospital, Capital Medical University, Beijing 100045, China.
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40
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Skin senescence: mechanisms and impact on whole-body aging. Trends Mol Med 2022; 28:97-109. [PMID: 35012887 DOI: 10.1016/j.molmed.2021.12.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 12/03/2021] [Accepted: 12/03/2021] [Indexed: 01/10/2023]
Abstract
The skin is the largest organ and has a key protective role. Similar to any other tissue, the skin is influenced not only by intrinsic/chronological aging, but also by extrinsic aging, triggered by environmental factors that contribute to accelerating the skin aging process. Aged skin shows structural, cellular, and molecular changes and accumulation of senescent cells. These senescent cells can induce or accelerate the age-related dysfunction of other nearby cells from the skin, or from different origins. However, the extent and underlying mechanisms remain unknown. In this opinion, we discuss the possible relevant role of skin senescence in the induction of aging phenotypes to other organs/tissues, contributing to whole-body aging. Moreover, we suggest that topical administration of senolytics/senotherapeutics could counteract the overall whole-body aging phenotype.
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41
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Hernandez AR, Hoffman JM, Hernandez CM, Cortes CJ, Jumbo-Lucioni P, Baxter MG, Esser KA, Liu AC, McMahon LL, Bizon JL, Burke SN, Buford TW, Carter CS. Reuniting the Body "Neck Up and Neck Down" to Understand Cognitive Aging: The Nexus of Geroscience and Neuroscience. J Gerontol A Biol Sci Med Sci 2022; 77:e1-e9. [PMID: 34309630 PMCID: PMC8751793 DOI: 10.1093/gerona/glab215] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Indexed: 02/01/2023] Open
Affiliation(s)
- Abbi R Hernandez
- Division of Gerontology, Geriatrics and Palliative Care, School of Medicine, University of Alabama at Birmingham, USA.,UAB Center for Exercise Medicine, University of Alabama at Birmingham, USA.,Evelyn F. McKnight Brain Institute, University of Alabama at Birmingham (UAB), USA
| | | | - Caesar M Hernandez
- Department of Cellular, Development, and Integrative Biology, School of Medicine, University of Alabama at Birmingham, USA
| | - Constanza J Cortes
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, USA.,Department of Cellular, Development, and Integrative Biology, School of Medicine, University of Alabama at Birmingham, USA.,UAB Nathan Shock Center for the Basic Biology of Aging, University of Alabama at Birmingham, USA.,Center for Neurodegeneration and Experimental Therapeutics, University of Alabama at Birmingham, USA
| | - Patricia Jumbo-Lucioni
- Department of Biology, University of Alabama at Birmingham, USA.,Pharmaceutical, Social, and Administrative Sciences, McWhorter School of Pharmacy, Samford University, Birmingham, Alabama,USA
| | - Mark G Baxter
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Karyn A Esser
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, USA
| | - Andrew C Liu
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, USA
| | - Lori L McMahon
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, USA.,Department of Cellular, Development, and Integrative Biology, School of Medicine, University of Alabama at Birmingham, USA.,UAB Nathan Shock Center for the Basic Biology of Aging, University of Alabama at Birmingham, USA.,UAB Integrative Center for Aging Research, University of Alabama at Birmingham, USA
| | - Jennifer L Bizon
- Department of Neuroscience and Center for Cognitive Aging and Memory, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, USA
| | - Sara N Burke
- Department of Neuroscience and Center for Cognitive Aging and Memory, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, USA
| | - Thomas W Buford
- Division of Gerontology, Geriatrics and Palliative Care, School of Medicine, University of Alabama at Birmingham, USA.,UAB Center for Exercise Medicine, University of Alabama at Birmingham, USA.,UAB Nathan Shock Center for the Basic Biology of Aging, University of Alabama at Birmingham, USA.,UAB Integrative Center for Aging Research, University of Alabama at Birmingham, USA.,Geriatric Research Education and Clinical Center, Birmingham VA Medical Center, Birmingham, AL, USA
| | - Christy S Carter
- Division of Gerontology, Geriatrics and Palliative Care, School of Medicine, University of Alabama at Birmingham, USA.,UAB Center for Exercise Medicine, University of Alabama at Birmingham, USA.,UAB Nathan Shock Center for the Basic Biology of Aging, University of Alabama at Birmingham, USA.,UAB Integrative Center for Aging Research, University of Alabama at Birmingham, USA
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Lu H, Ma L, Zhang Y, Feng Y, Zhang J, Wang S. Current Animal Model Systems for Ovarian Aging Research. Aging Dis 2022; 13:1183-1195. [PMID: 35855343 PMCID: PMC9286907 DOI: 10.14336/ad.2021.1209] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 12/07/2021] [Indexed: 11/15/2022] Open
Abstract
Ovarian aging leads to menopause, loss of fertility and other disorders in multiple organs, which brings great distress to women. For ethical reasons, it is impossible to use humans as direct study subjects for aging research. Therefore, biomedical researchers have employed different non-human organisms to study ovarian aging, including worms, fruit flies, fishes, amphibians, birds, mice, rats, cavies, rabbits, pigs, sheep, cows, horses, monkeys, and apes. Because each of these model organisms has its own features, multiple factors, such as size, anatomical structure, cost, ease of operation, fertility, generation time, lifespan, and gene heredity, should be carefully considered when selecting a model system to study ovarian aging. An appropriate model organism would help researchers explore the risk factors and elucidate molecular mechanisms underlying declined ovarian functions, which might be conducive to preventing or delaying the ovarian aging process. This article will offer an overview on several currently available and commonly used model organisms for ovarian aging research by comparing their pros and cons. In doing so, we hope to provide useful information for ovarian aging researchers.
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Affiliation(s)
- Huan Lu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Lingwei Ma
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Yan Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Yanzhi Feng
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
| | - Jinjin Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
- Correspondence should be addressed to: Dr. Shixuan Wang () and Dr. Jinjin Zhang (), Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan, Hubei, China
| | - Shixuan Wang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
- National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei 430030, China.
- Key Laboratory of Cancer Invasion and Metastasis, Ministry of Education, Wuhan, Hubei 430030, China.
- Correspondence should be addressed to: Dr. Shixuan Wang () and Dr. Jinjin Zhang (), Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan, Hubei, China
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Cao X, Yang G, Jin X, He L, Li X, Zheng Z, Liu Z, Wu C. A Machine Learning-Based Aging Measure Among Middle-Aged and Older Chinese Adults: The China Health and Retirement Longitudinal Study. Front Med (Lausanne) 2021; 8:698851. [PMID: 34926482 PMCID: PMC8671693 DOI: 10.3389/fmed.2021.698851] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 10/28/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: Biological age (BA) has been accepted as a more accurate proxy of aging than chronological age (CA). This study aimed to use machine learning (ML) algorithms to estimate BA in the Chinese population. Materials and methods: We used data from 9,771 middle-aged and older Chinese adults (≥45 years) in the 2011/2012 wave of the China Health and Retirement Longitudinal Study and followed until 2018. We used several ML algorithms (e.g., Gradient Boosting Regressor, Random Forest, CatBoost Regressor, and Support Vector Machine) to develop new measures of biological aging (ML-BAs) based on physiological biomarkers. R-squared value and mean absolute error (MAE) were used to determine the optimal performance of these ML-BAs. We used logistic regression models to examine the associations of the best ML-BA and a conventional aging measure-Klemera and Doubal method-BA (KDM-BA) we previously developed-with physical disability and mortality, respectively. Results: The Gradient Boosting Regression model performed the best, resulting in an ML-BA with an R-squared value of 0.270 and an MAE of 6.519. This ML-BA was significantly associated with disability in basic activities of daily living, instrumental activities of daily living, lower extremity mobility, and upper extremity mobility, and mortality, with odds ratios ranging from 1 to 7% (per 1-year increment in ML-BA, all P < 0.001), independent of CA. These associations were generally comparable to that of KDM-BA. Conclusion: This study provides a valid ML-based measure of biological aging for middle-aged and older Chinese adults. These findings support the application of ML in geroscience research and may help facilitate preventive and geroprotector intervention studies.
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Affiliation(s)
- Xingqi Cao
- Department of Big Data in Health Science, School of Public Health and Center for Clinical Big Data and Analytics, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Guanglai Yang
- Global Health Research Center, Duke Kunshan University, Kunshan, China
| | - Xurui Jin
- Global Health Research Center, Duke Kunshan University, Kunshan, China.,MindRank AI ltd., Hangzhou, China
| | - Liu He
- Department of Big Data in Health Science, School of Public Health and Center for Clinical Big Data and Analytics, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xueqin Li
- Department of Big Data in Health Science, School of Public Health and Center for Clinical Big Data and Analytics, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhoutao Zheng
- Department of Big Data in Health Science, School of Public Health and Center for Clinical Big Data and Analytics, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zuyun Liu
- Department of Big Data in Health Science, School of Public Health and Center for Clinical Big Data and Analytics, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chenkai Wu
- Global Health Research Center, Duke Kunshan University, Kunshan, China
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Bhusal A, Rahman MH, Suk K. Hypothalamic inflammation in metabolic disorders and aging. Cell Mol Life Sci 2021; 79:32. [PMID: 34910246 PMCID: PMC11071926 DOI: 10.1007/s00018-021-04019-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/01/2021] [Accepted: 10/29/2021] [Indexed: 12/15/2022]
Abstract
The hypothalamus is a critical brain region for the regulation of energy homeostasis. Over the years, studies on energy metabolism primarily focused on the neuronal component of the hypothalamus. Studies have recently uncovered the vital role of glial cells as an additional player in energy balance regulation. However, their inflammatory activation under metabolic stress condition contributes to various metabolic diseases. The recruitment of monocytes and macrophages in the hypothalamus helps sustain such inflammation and worsens the disease state. Neurons were found to actively participate in hypothalamic inflammatory response by transmitting signals to the surrounding non-neuronal cells. This activation of different cell types in the hypothalamus leads to chronic, low-grade inflammation, impairing energy balance and contributing to defective feeding habits, thermogenesis, and insulin and leptin signaling, eventually leading to metabolic disorders (i.e., diabetes, obesity, and hypertension). The hypothalamus is also responsible for the causation of systemic aging under metabolic stress. A better understanding of the multiple factors contributing to hypothalamic inflammation, the role of the different hypothalamic cells, and their crosstalks may help identify new therapeutic targets. In this review, we focus on the role of glial cells in establishing a cause-effect relationship between hypothalamic inflammation and the development of metabolic diseases. We also cover the role of other cell types and discuss the possibilities and challenges of targeting hypothalamic inflammation as a valid therapeutic approach.
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Affiliation(s)
- Anup Bhusal
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
| | - Md Habibur Rahman
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
- Division of Endocrinology, Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, 08901, USA
| | - Kyoungho Suk
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea.
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea.
- Brain Science and Engineering Institute, Kyungpook National University, Daegu, 41944, Republic of Korea.
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45
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Porseva VV, Levshin NY, Moiseev KY, Pankrasheva LG, Baranov AA, Pavlov AV, Nozdrachev AD, Masliukov PM. Let-7a, mir-9, mir-132, and mir-218 microRNA Expression in the Dorsomedial and Ventromedial Hypothalamic Nuclei during Aging in Rats. ADVANCES IN GERONTOLOGY 2021. [DOI: 10.1134/s207905702104010x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Li J, Long J, Zhang Q, Shen H, Guo AY, Ma Z, Zhang G. Hypothalamic long noncoding RNA AK044061 is involved in the development of dietary obesity in mice. Int J Obes (Lond) 2021; 45:2638-2647. [PMID: 34446844 DOI: 10.1038/s41366-021-00945-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 08/16/2021] [Accepted: 08/16/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Long noncoding RNAs (lncRNAs) have been implicated in various important biological processes, however, its role in energy balance and obesity remains largely unknown. METHODS Differentially expressed lncRNAs in the hypothalamus of diet-induced obesity (DIO) mice versus chow-fed mice were identified by RNA sequencing. Lentivirus-mediated overexpression and knockdown of a novel lncRNA, AK044061, were used to assess its role in energy balance and the development of DIO. RNA immunoprecipitation (RIP) and pull down assays were carried out to analyze the interaction between lncRNA AK044061 and RelA, an NF-κB subunit. RESULTS LncRNA AK044061 was upregulated in the hypothalamus of DIO mice. Acute intracerebroventricular (i.c.v.) infusion of glucose reduced the expression of lncRNA AK044061, whereas an overnight of fasting enhanced its expression. RNA in situ hybridization data showed that AK044061 was expressed in the neurons of the arcuate nucleus (ARC). Lentivirus-mediated overexpression of AK044061 in ARC cells, or in the neurons of the ARC nucleus led to an obesity-like phenotype and related metabolic disorders. Furthermore, knockdown of lncRNA AK044061 in Agouti-related peptide (AgRP)-expressing neurons mitigated DIO and its related metabolic dysregulations. In mechanism, we showed that lncRNA AK044061 was associated with RelA and could enhance the NF-κB reporter activity. The effect of lncRNA AK044061 on energy balance is mediated by NF-κB. CONCLUSIONS Our findings suggest that excessive lncRNA AK044061 in the ARC nucleus leads to energy imbalance and obesity. LncRNA AK044061 expressed in the AgRP neurons is important in the development of dietary obesity in mice.
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Affiliation(s)
- Juan Li
- Key Laboratory of Environmental Health, Ministry of Education, Department of Toxicology, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Institute for Brain Research, Collaborative Innovation Center for Brain Science, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jinlie Long
- Key Laboratory of Environmental Health, Ministry of Education, Department of Toxicology, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qiong Zhang
- Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Bioinformatics and Systems Biology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hongyuan Shen
- Singapore Nuclear Research and Safety Initiative, National University of Singapore, Singapore, Singapore
| | - An-Yuan Guo
- Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Bioinformatics and Systems Biology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China.
| | - Zhaowu Ma
- School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, Hubei, China.
| | - Guo Zhang
- Key Laboratory of Environmental Health, Ministry of Education, Department of Toxicology, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China. .,Institute for Brain Research, Collaborative Innovation Center for Brain Science, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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47
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Queen NJ, Deng H, Huang W, Mo X, Wilkins RK, Zhu T, Wu X, Cao L. Environmental Enrichment Mitigates Age-Related Metabolic Decline and Lewis Lung Carcinoma Growth in Aged Female Mice. Cancer Prev Res (Phila) 2021; 14:1075-1088. [PMID: 34535449 PMCID: PMC8639669 DOI: 10.1158/1940-6207.capr-21-0085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/05/2021] [Accepted: 08/31/2021] [Indexed: 11/16/2022]
Abstract
Aging is a complex physiological process that leads to the progressive decline of metabolic and immune function, among other biological mechanisms. As global life expectancy increases, it is important to understand determinants of healthy aging-including environmental and genetic factors-and thus slow the onset or progression of age-related disease. Environmental enrichment (EE) is a housing environment wherein laboratory animals engage with complex physical and social stimulation. EE is a prime model to understand environmental influences on aging dynamics, as it confers an antiobesity and anticancer phenotype that has been implicated in healthy aging and health span extension. Although EE is frequently used to study malignancies in young mice, fewer studies characterize EE-cancer outcomes in older mice. Here, we used young (3-month-old) and aged (14-month-old) female C57BL/6 mice to determine whether EE would be able to mitigate age-related deficiencies in metabolic function and thus alter Lewis lung carcinoma (LLC) growth. Overall, EE improved metabolic function, resulting in reduced fat mass, increased lean mass, and improved glycemic processing; many of these effects were stronger in the aged cohort than in the young cohort, indicating an age-driven effect on metabolic responses. In the aged-EE cohort, subcutaneously implanted LLC tumor growth was inhibited and tumors exhibited alterations in various markers of apoptosis, proliferation, angiogenesis, inflammation, and malignancy. These results validate EE as an anticancer model in aged mice and underscore the importance of understanding environmental influences on cancer malignancy in aged populations. PREVENTION RELEVANCE: Environmental enrichment (EE) serves as a model of complex physical and social stimulation. This study validates EE as an anticancer intervention paradigm in aged mice and underscores the importance of understanding environmental influences on cancer malignancy in aged populations.
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Affiliation(s)
- Nicholas J Queen
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, Ohio
- The Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Hong Deng
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, Ohio
- The Ohio State University Comprehensive Cancer Center, Columbus, Ohio
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Wei Huang
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, Ohio
- The Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Xiaokui Mo
- Department of Biomedical Informatics, College of Medicine, The Ohio State University, Columbus, Ohio
| | - Ryan K Wilkins
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, Ohio
- The Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Tao Zhu
- Department of Pathology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Xiaoyu Wu
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Lei Cao
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, Ohio.
- The Ohio State University Comprehensive Cancer Center, Columbus, Ohio
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Ikewaki N, Dedeepiya VD, Raghavan K, Rao KS, Vaddi S, Osawa H, Kisaka T, Kurosawa G, Srinivasan S, Kumar SRB, Senthilkumar R, Iwasaki M, Preethy S, Abraham SJK. β‑glucan vaccine adjuvant approach for cancer treatment through immune enhancement (B‑VACCIEN) in specific immunocompromised populations (Review). Oncol Rep 2021; 47:14. [PMID: 34779494 DOI: 10.3892/or.2021.8225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 10/07/2021] [Indexed: 11/06/2022] Open
Abstract
The incidence of cancer, which is the second leading cause of mortality globally, continues to increase, although continued efforts are being made to identify effective treatments with fewer side‑effects. Previous studies have reported that chronic microinflammation, which occurs in diseases, including diabetes, along with weakened immune systems, may ultimately lead to cancer development. Chemotherapy, radiotherapy and surgery are the mainstream approaches to treatment; however, they all lead to immune system weakness, which in turn increases the metastatic spread. The aim of the present review was to provide evidence of a biological response modifier β‑glucan [β‑glucan vaccine adjuvant approach to treating cancer via immune enhancement (B‑VACCIEN)] and its beneficial effects, including vaccine‑adjuvant potential, balancing metabolic parameters (including blood glucose and lipid levels), increasing peripheral blood cell cytotoxicity against cancer and alleviating chemotherapy side effects in animal models. This suggests its value as a potential strategy to provide long‑term prophylaxis in immunocompromised individuals or genetically prone to cancer.
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Affiliation(s)
- Nobunao Ikewaki
- Department of Medical Life Science, Kyushu University of Health and Welfare, Nobeoka, Miyazaki 882‑8508, Japan
| | | | - Kadalraja Raghavan
- Department of Paediatric Neurology, Kenmax Medical Service Private Limited, Tallakulam, Madurai 625002, India
| | - Kosagi-Sharaf Rao
- Institute of Scientific Research and High Technology Services of Panama (INDICASAT‑AIP), Clayton 88888, Republic of Panama
| | - Suryaprakash Vaddi
- Department of Urology, Yashoda Hospitals, Hyderabad, Telangana 50008, India
| | - Hiroshi Osawa
- Clinical Services Department, Omote Medical Clinic, Chiba 296‑8602, Japan
| | - Tomohiko Kisaka
- Division of Biodesign, Office of Research and Academic‑Government‑Community Collaboration, Hiroshima University, Higashihiroshima, Hiroshima 739‑8511, Japan
| | - Gene Kurosawa
- Department of Academic Research Support Promotion Facility, Center for Research Promotion and Support, Fujita Health University, Toyoake, Aichi 470‑1192, Japan
| | - Subramaniam Srinivasan
- The Mary‑Yoshio Translational Hexagon (MYTH), Nichi‑In Centre for Regenerative Medicine (NCRM), Chennai 600034, India
| | | | - Rajappa Senthilkumar
- The Fujio‑Eiji Academic Terrain (FEAT), Nichi‑In Centre for Regenerative Medicine (NCRM), Chennai 600034, India
| | - Masaru Iwasaki
- Centre for Advancing Clinical Research (CACR), University of Yamanashi‑ School of Medicine, Chuo, Yamanashi 409‑3898, Japan
| | - Senthilkumar Preethy
- The Fujio‑Eiji Academic Terrain (FEAT), Nichi‑In Centre for Regenerative Medicine (NCRM), Chennai 600034, India
| | - Samuel J K Abraham
- The Mary‑Yoshio Translational Hexagon (MYTH), Nichi‑In Centre for Regenerative Medicine (NCRM), Chennai 600034, India
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49
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Huang HT, Chen PC, Chen PS, Chiu WT, Kuo YM, Tzeng SF. Inhibitory Effects of Trifluoperazine on Peripheral Proinflammatory Cytokine Expression and Hypothalamic Microglia Activation in Obese Mice Induced by Chronic Feeding With High-Fat-Diet. Front Cell Neurosci 2021; 15:752771. [PMID: 34764855 PMCID: PMC8576196 DOI: 10.3389/fncel.2021.752771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/05/2021] [Indexed: 11/13/2022] Open
Abstract
Microglia and astrocytes are the glial cells of the central nervous system (CNS) to support neurodevelopment and neuronal function. Yet, their activation in association with CNS inflammation is involved in the initiation and progression of neurological disorders. Mild inflammation in the periphery and glial activation called as gliosis in the hypothalamic region, arcuate nucleus (ARC), are generally observed in obese individuals and animal models. Thus, reduction in peripheral and central inflammation is considered as a strategy to lessen the abnormality of obesity-associated metabolic indices. In this study, we reported that acute peripheral challenge by inflammagen lipopolysaccharide (LPS) upregulated the expression of hypothalamic dopamine type 2 receptor (D2R) mRNA, and chronic feeding by high-fat-diet (HFD) significantly caused increased levels of D2R in the ARC. The in vitro and in vivo studies indicated that an FDA-approved antipsychotic drug named trifluoperazine (TFP), a D2R inhibitor was able to suppress LPS-stimulated activation of microglia and effectively inhibited LPS-induced peripheral inflammation, as well as hypothalamic inflammation. Further findings showed daily peripheral administration intraperitoneally (i.p.) by TFP for 4 weeks was able to reduce the levels of plasma tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) in accompany with lower levels of plasma glucose and insulin in obese mice receiving HFD for 16 weeks when compared those in obese mice without TFP treatment. In parallel, the activation of microglia and astrocytes in the ARC was also inhibited by peripheral administration by TFP. According to our results, TFP has the ability to suppress HFD-induced ARC gliosis and inflammation in the hypothalamus.
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Affiliation(s)
- Hui-Ting Huang
- Institute of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Pei-Chun Chen
- Institute of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Po-See Chen
- Department of Psychiatry, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wen-Tai Chiu
- Department of Biomedical Engineering, College of Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Min Kuo
- Institute of Basic Medical Sciences, Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shun-Fen Tzeng
- Institute of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
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50
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Wang Z, Wu W, Kim MS, Cai D. GnRH pulse frequency and irregularity play a role in male aging. NATURE AGING 2021; 1:904-918. [PMID: 37118330 DOI: 10.1038/s43587-021-00116-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 08/12/2021] [Indexed: 04/30/2023]
Abstract
Gonadotropin-releasing hormone (GnRH) has a role in hypothalamic control of aging, but the underlying patterns and relationship with downstream reproductive hormones are still unclear. Here we report that hypothalamic GnRH pulse frequency and irregularity increase before GnRH pulse amplitude slowly decreases during aging. GnRH is inhibited by nuclear factor (NF)-κB, and GnRH pulses were controlled by oscillations in the transcriptional activity of NF-κB. Exposure to testosterone under pro-inflammatory conditions stimulated both NF-κB oscillations and GnRH pulses. While castration of middle-aged mice induced short-term anti-aging effects, preventing elevation of luteinizing hormone (LH) levels after castration led to long-term anti-aging effects and lifespan extension, indicating that high-frequency GnRH pulses and high-magnitude LH levels coordinately mediate aging. Reprogramming the endogenous GnRH pulses of middle-aged male mice via an optogenetic approach revealed that increasing GnRH pulses frequency causes LH excess and aging acceleration, while lowering the frequency of and stabilizing GnRH pulses can slow down aging. In conclusion, GnRH pulses are important for aging in male mice.
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Affiliation(s)
- Zhouguang Wang
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Wenhe Wu
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Min Soo Kim
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Dongsheng Cai
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA.
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