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Qian Q, Li M, Zhang Z, Davis SW, Rahmouni K, Norris AW, Cao H, Ding WX, Hotamisligil GS, Yang L. Obesity disrupts the pituitary-hepatic UPR communication leading to NAFLD progression. Cell Metab 2024; 36:1550-1565.e9. [PMID: 38718793 PMCID: PMC11222033 DOI: 10.1016/j.cmet.2024.04.014] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 03/05/2024] [Accepted: 04/17/2024] [Indexed: 07/05/2024]
Abstract
Obesity alters levels of pituitary hormones that govern hepatic immune-metabolic homeostasis, dysregulation of which leads to nonalcoholic fatty liver disease (NAFLD). However, the impact of obesity on intra-pituitary homeostasis is largely unknown. Here, we uncovered a blunted unfolded protein response (UPR) but elevated inflammatory signatures in pituitary glands of obese mice and humans. Furthermore, we found that obesity inflames the pituitary gland, leading to impaired pituitary inositol-requiring enzyme 1α (IRE1α)-X-box-binding protein 1 (XBP1) UPR branch, which is essential for protecting against pituitary endocrine defects and NAFLD progression. Intriguingly, pituitary IRE1-deletion resulted in hypothyroidism and suppressed the thyroid hormone receptor B (THRB)-mediated activation of Xbp1 in the liver. Conversely, activation of the hepatic THRB-XBP1 axis improved NAFLD in mice with pituitary UPR defect. Our study provides the first evidence and mechanism of obesity-induced intra-pituitary cellular defects and the pathophysiological role of pituitary-liver UPR communication in NAFLD progression.
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Affiliation(s)
- Qingwen Qian
- Department of Anatomy and Cell Biology, Fraternal Order of Eagles Diabetes Research Center, Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Mark Li
- Department of Anatomy and Cell Biology, Fraternal Order of Eagles Diabetes Research Center, Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Zeyuan Zhang
- Department of Anatomy and Cell Biology, Fraternal Order of Eagles Diabetes Research Center, Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Shannon W Davis
- Department of Biological Sciences, College of Arts and Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Kamal Rahmouni
- Department of Neuroscience and Pharmacology, Fraternal Order of Eagles Diabetes Research Center, Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Andrew W Norris
- Division of Endocrinology and Diabetes, Department of Pediatrics, Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Huojun Cao
- Iowa Institute for Oral Health Research, Division of Biostatistics and Computational Biology, Department of Endodontics, University of Iowa College of Dentistry, Iowa City, IA 52242, USA
| | - Wen-Xing Ding
- Department of Pharmacology, Toxicology and Therapeutics, The University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Gökhan S Hotamisligil
- Sabri Ülker Center for Metabolic Research, Department of Molecular Metabolism, Harvard T.H. School of Public Health, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02141, USA
| | - Ling Yang
- Department of Anatomy and Cell Biology, Fraternal Order of Eagles Diabetes Research Center, Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
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2
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Wang J, Chehrehasa F, Moody H, Beecher K. Does neuroscience research change behaviour? A scoping review and case study in obesity neuroscience. Neurosci Biobehav Rev 2024; 159:105598. [PMID: 38401576 DOI: 10.1016/j.neubiorev.2024.105598] [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: 11/09/2023] [Revised: 01/31/2024] [Accepted: 02/19/2024] [Indexed: 02/26/2024]
Abstract
The language employed by researchers to define and discuss diseases can itself be a determinant of health. Despite this, the framing of diseases in medical research literature is largely unexplored. This scoping review examines a prevalent medical issue with social determinants influenced by the framing of its pathogenesis: obesity. Specifically, we compare the currently dominant framing of obesity as an addiction to food with the emerging frame of obesity developing from neuroinflammation. We triangulate both corpus linguistic and bibliometric analysis of the top 200 most engaging neuroscience journal articles discussing obesity that were published open access in the past 10 years. The constructed Neurobesity Corpus is available for public use. The scoping review analysis confirmed that neuroinflammation is an emerging way for obesity to be framed in medical research. Importantly, the articles analysed that discussed neuroinflammation were less likely to use crisis terminology, such as referring to an obesity "epidemic". We highlight a potential relationship between the adoption of addiction frames and the use of stigmatising language in medical research.
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Affiliation(s)
- Joshua Wang
- School of Clinical Sciences, Faculty of Health, Queensland University of Technology, 2 George Street, Brisbane, QLD 4000, Australia.
| | - Fatemeh Chehrehasa
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, 2 George Street, Brisbane, QLD 4000, Australia
| | - Hayley Moody
- Queensland University of Technology, 2 George Street, Brisbane, QLD 4000, Australia
| | - Kate Beecher
- UQ Centre for Clinical Research, Faculty of Medicine, University of Queensland, Building 71/918 Royal Brisbane and Women's Hospital Campus, Herston, QLD 4029, Australia
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3
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Jalo A, Helin JS, Hentilä J, Nissinen TA, Honkala SM, Heiskanen MA, Löyttyniemi E, Malm T, Hannukainen JC. Mechanisms Leading to Increased Insulin-Stimulated Cerebral Glucose Uptake in Obesity and Insulin Resistance: A High-Fat Diet and Exercise Training Intervention PET Study with Rats (CROSRAT). J Funct Morphol Kinesiol 2024; 9:58. [PMID: 38651416 PMCID: PMC11036253 DOI: 10.3390/jfmk9020058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/15/2024] [Accepted: 03/20/2024] [Indexed: 04/25/2024] Open
Abstract
Recent studies have shown that obesity and insulin resistance are associated with increased insulin-stimulated glucose uptake (GU) in the brain. Thus, insulin sensitivity seems to work differently in the brain compared to the peripheral tissues like skeletal muscles, but the underlying mechanisms remain unknown. Regular exercise training improves skeletal muscle and whole-body insulin sensitivity. However, the effect of exercise on glucose metabolism in the brain and internal organs is less well understood. The CROSRAT study aims to investigate the effects of exercise training on brain glucose metabolism and inflammation in a high-fat diet-induced rat model of obesity and insulin resistance. Male Sprague Dawley rats (n = 144) are divided into nine study groups that undergo different dietary and/or exercise training interventions lasting 12 to 24 weeks. Insulin-stimulated GU from various tissues and brain inflammation are investigated using [18F]FDG-PET/CT and [11C]PK11195-PET/CT, respectively. In addition, peripheral tissue, brain, and fecal samples are collected to study the underlying mechanisms. The strength of this study design is that it allows examining the effects of both diet and exercise training on obesity-induced insulin resistance and inflammation. As the pathophysiological changes are studied simultaneously in many tissues and organs at several time points, the study provides insight into when and where these pathophysiological changes occur.
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Affiliation(s)
- Anna Jalo
- MediCity Research Laboratory, University of Turku, Tykistökatu 6 A, FI-20520 Turku, Finland
- Preclinical Imaging Laboratory, Turku PET Centre, University of Turku, Tykistökatu 6 A, FI-20520 Turku, Finland
- Doctoral Programme in Clinical Research, University of Turku, FI-20520 Turku, Finland
| | - Jatta S. Helin
- MediCity Research Laboratory, University of Turku, Tykistökatu 6 A, FI-20520 Turku, Finland
- Preclinical Imaging Laboratory, Turku PET Centre, University of Turku, Tykistökatu 6 A, FI-20520 Turku, Finland
| | - Jaakko Hentilä
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20521 Turku, Finland
| | - Tuuli A. Nissinen
- MediCity Research Laboratory, University of Turku, Tykistökatu 6 A, FI-20520 Turku, Finland
- Preclinical Imaging Laboratory, Turku PET Centre, University of Turku, Tykistökatu 6 A, FI-20520 Turku, Finland
| | - Sanna M. Honkala
- Turku PET Centre, University of Turku, P.O. Box 52, FI-20521 Turku, Finland
| | - Marja A. Heiskanen
- Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Kiinamyllynkatu 10, FI-20520 Turku, Finland
- Centre for Population Health Research, University of Turku and Turku University Hospital, Kiinamyllynkatu 10, FI-20520 Turku, Finland
| | - Eliisa Löyttyniemi
- Department of Biostatistics, University of Turku and Turku University Hospital, Kiinamyllynkatu 10, FI-20520 Turku, Finland
| | - Tarja Malm
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Yliopistonranta 8, FI-70210 Kuopio, Finland
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Awada C, Saporito AF, Zelikoff JT, Klein CB. E-Cigarette Exposure Alters Neuroinflammation Gene and Protein Expression in a Murine Model: Insights from Perinatally Exposed Offspring and Post-Birth Mothers. Genes (Basel) 2024; 15:322. [PMID: 38540381 PMCID: PMC10970539 DOI: 10.3390/genes15030322] [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: 01/26/2024] [Revised: 02/25/2024] [Accepted: 02/28/2024] [Indexed: 06/14/2024] Open
Abstract
The use of E-cigarettes, often considered a safer alternative to traditional smoking, has been associated with high rates of cellular toxicity, genetic alterations, and inflammation. Neuroinflammatory impacts of cigarette smoking during pregnancy have been associated with increased risks of adverse childhood health outcomes; however, it is still relatively unknown if the same propensity is conferred on offspring by maternal vaping during gestation. Results from our previous mouse inhalation studies suggest such a connection. In this earlier study, pregnant C57BL/6 mice were exposed daily to inhaled E-cig aerosols (i.e., propylene glycol and vegetable glycerin, [PG/VG]), with or without nicotine (16 mg/mL) by whole-body inhalation throughout gestation (3 h/d; 5 d/week; total ~3-week) and continuing postnatally from post-natal day (PND) 4-21. As neuroinflammation is involved in the dysregulation of glucose homeostasis and weight gain, this study aimed to explore genes associated with these pathways in 1-mo.-old offspring (equivalent in humans to 12-18 years of age). Results in the offspring demonstrated a significant increase in glucose metabolism protein levels in both treatment groups compared to filtered air controls. Gene expression analysis in the hypothalamus of 1 mo. old offspring exposed perinatally to E-cig aerosols, with and without nicotine, revealed significantly increased gene expression changes in multiple genes associated with neuroinflammation. In a second proof-of-principal parallel study employing the same experimental design, we shifted our focus to the hippocampus of the postpartum mothers. We targeted the mRNA levels of several neurotrophic factors (NTFs) indicative of neuroinflammation. While there were suggestive changes in mRNA expression in this study, levels failed to reach statistical significance. These studies highlight the need for ongoing research on E-cig-induced alterations in neuroinflammatory pathways.
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Affiliation(s)
- Christina Awada
- Division of Environmental Medicine, New York University Grossman School of Medicine, New York, NY 10010, USA; (A.F.S.); (J.T.Z.); (C.B.K.)
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5
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Chapple B, Woodfin S, Moore W. The Perfect Cup? Coffee-Derived Polyphenols and Their Roles in Mitigating Factors Affecting Type 2 Diabetes Pathogenesis. Molecules 2024; 29:751. [PMID: 38398503 PMCID: PMC10891742 DOI: 10.3390/molecules29040751] [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: 01/10/2024] [Revised: 01/29/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
Type 2 diabetes (T2D) is a growing health concern with an estimated 462 million people having been diagnosed worldwide. T2D is characterized by chronically elevated blood glucose and insulin resistance, which culminate in a diminished function of the β-cell mass in its later stages. This can be perpetuated by and result in inflammation, excess reactive oxygen species production, obesity, and the dysregulation of multiple cellular pathways. Many naturally occurring small molecules have been investigated in terms of their roles in modulating glucose homeostasis and β-cell function. Many of these compounds can be found in commonly used sources of food and drink. Interestingly, a correlation has been observed between coffee consumption and T2D incidence. However, the specific compounds responsible for this correlation and their mechanisms are still somewhat undetermined. This paper reviews recent research findings on the effects of several polyphenols that are either found in coffee or are metabolites of compounds found in coffee (enterodiol, enterolactone, matairesinol, secoisolariciresinol, kaempferol, quercetin, and chlorogenic acid) on glucose homeostasis and health complications associated with glucose dysregulation, with a special emphasis on their potential anti-diabetic effects. The factors that affect polyphenol content in coffee are also addressed.
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Affiliation(s)
| | | | - William Moore
- Department of Biology and Chemistry, School of Health Sciences, Liberty University, Lynchburg, VA 24515, USA; (B.C.); (S.W.)
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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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7
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Ishikawa H, Nagashima R, Kuno Y, Sasaki H, Kohda C, Iyoda M. Effects of NKT Cells on Metabolic Disorders Caused by High-Fat Diet Using CD1d-Knockout Mice. Diabetes Metab Syndr Obes 2023; 16:2855-2864. [PMID: 37744699 PMCID: PMC10517681 DOI: 10.2147/dmso.s428190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/14/2023] [Indexed: 09/26/2023] Open
Abstract
Purpose The purpose of this study was to investigate whether NKT cells play an important role in preventing or exacerbating diseases caused by high-fat diet (HFD) using CD1d-knockout (KO) mice which lack NKT cells. Methods Five-week-old male Balb/c (wild-type; WT) or CD1dKO mice were fed with control-diet (CTD) or HFD for 16 weeks. Results The present study revealed four main findings. First, CD1dKO mice were susceptible to obesity caused by HFD in comparison to WT mice. Second, clinical conditions of fatty liver caused by HFD were comparable between CD1dKO mice and WT mice. Third, HFD-fed WT mice showed high levels of serum biochemical markers, involved in lipid metabolisms, in comparison to WT mice fed a CTD. Notably, the serum concentrations of ALT, T-CHO, TG and HDL-C in CD1dKO mice fed a HFD were almost comparable to those of CD1dKO mice fed a CTD. Fourth, the expression of peroxisome proliferator-activated receptor (PPAR) γ, low-density lipoprotein receptor (LDLR), CD36 of epididymal adipose tissue enhanced and proprotein convertase subtilisin/kexin type (PCSK) 9 in serum decreased. Conclusion NKT cells were responsible for protection against HFD-induced obesity. However, CD1dKO mice were resistant to serum biochemical marker abnormalities after HFD feeding. One possible explanation is that the epididymal adipose tissue of CD1dKO mice could take up greater amounts of excess lipids in serum in comparison to WT mice.
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Affiliation(s)
- Hiroki Ishikawa
- Department of Microbiology and Immunology, Showa University School of Medicine, Tokyo, 142-8555, Japan
| | - Ryuichi Nagashima
- Department of Microbiology and Immunology, Showa University School of Medicine, Tokyo, 142-8555, Japan
| | - Yoshihiro Kuno
- Department of Microbiology and Immunology, Showa University School of Medicine, Tokyo, 142-8555, Japan
- Division of Nephrology, Department of Medicine, Showa University School of Medicine, Tokyo, 142-8666, Japan
| | - Hiraku Sasaki
- Department of Health Science, Faculty of Health and Sports Science, Juntendo University, Inzai, Chiba, 270-1695, Japan
| | - Chikara Kohda
- Department of Microbiology and Immunology, Showa University School of Medicine, Tokyo, 142-8555, Japan
| | - Masayuki Iyoda
- Department of Microbiology and Immunology, Showa University School of Medicine, Tokyo, 142-8555, Japan
- Division of Nephrology, Department of Medicine, Showa University School of Medicine, Tokyo, 142-8666, Japan
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8
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Clemente-Suárez VJ, Beltrán-Velasco AI, Redondo-Flórez L, Martín-Rodríguez A, Yáñez-Sepúlveda R, Tornero-Aguilera JF. Neuro-Vulnerability in Energy Metabolism Regulation: A Comprehensive Narrative Review. Nutrients 2023; 15:3106. [PMID: 37513524 PMCID: PMC10383861 DOI: 10.3390/nu15143106] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/09/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
This comprehensive narrative review explores the concept of neuro-vulnerability in energy metabolism regulation and its implications for metabolic disorders. The review highlights the complex interactions among the neural, hormonal, and metabolic pathways involved in the regulation of energy metabolism. The key topics discussed include the role of organs, hormones, and neural circuits in maintaining metabolic balance. The review investigates the association between neuro-vulnerability and metabolic disorders, such as obesity, insulin resistance, and eating disorders, considering genetic, epigenetic, and environmental factors that influence neuro-vulnerability and subsequent metabolic dysregulation. Neuroendocrine interactions and the neural regulation of food intake and energy expenditure are examined, with a focus on the impact of neuro-vulnerability on appetite dysregulation and altered energy expenditure. The role of neuroinflammation in metabolic health and neuro-vulnerability is discussed, emphasizing the bidirectional relationship between metabolic dysregulation and neuroinflammatory processes. This review also evaluates the use of neuroimaging techniques in studying neuro-vulnerability and their potential applications in clinical settings. Furthermore, the association between neuro-vulnerability and eating disorders, as well as its contribution to obesity, is examined. Potential therapeutic interventions targeting neuro-vulnerability, including pharmacological treatments and lifestyle modifications, are reviewed. In conclusion, understanding the concept of neuro-vulnerability in energy metabolism regulation is crucial for addressing metabolic disorders. This review provides valuable insights into the underlying neurobiological mechanisms and their implications for metabolic health. Targeting neuro-vulnerability holds promise for developing innovative strategies in the prevention and treatment of metabolic disorders, ultimately improving metabolic health outcomes.
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Affiliation(s)
- Vicente Javier Clemente-Suárez
- Faculty of Sports Sciences, Universidad Europea de Madrid, Tajo Street, s/n, 28670 Madrid, Spain
- Grupo de Investigación en Cultura, Educación y Sociedad, Universidad de la Costa, Barranquilla 080002, Colombia
| | | | - Laura Redondo-Flórez
- Department of Health Sciences, Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, Tajo Street s/n, 28670 Madrid, Spain
| | | | - Rodrigo Yáñez-Sepúlveda
- Faculty of Education and Social Sciences, Universidad Andres Bello, Viña del Mar 2520000, Chile
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9
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So SW, Fleming KM, Nixon JP, Butterick TA. Early Life Obesity Increases Neuroinflammation, Amyloid Beta Deposition, and Cognitive Decline in a Mouse Model of Alzheimer's Disease. Nutrients 2023; 15:nu15112494. [PMID: 37299457 DOI: 10.3390/nu15112494] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Obesity, a known risk factor of Alzheimer's disease (AD), increases the activation of microglia, leading to a proinflammatory phenotype. Our previous work shows that a high fat diet (HFD) can cause neuroinflammation and cognitive decline in mice. We hypothesized that proinflammatory activation of brain microglia in obesity exacerbates AD pathology and increases the accumulation of amyloid beta (Aβ) plaques. Presently, we tested cognitive function in 8-month-old male and female APP/PS1 mice fed a HFD, starting at 1.5 months of age. Locomotor activity, anxiety-like behavior, behavioral despair, and spatial memory were all assessed through behavioral tests. Microgliosis and Aβ deposition were measured in multiple brain regions through immunohistochemical analysis. Our results show that a HFD decreases locomotor activity, while increasing anxiety-like behavior and behavioral despair independent of genotype. A HFD led to increased memory deficits in both sexes, with HFD-fed APP/PS1 mice performing the worst out of all groups. Immunohistochemical analysis showed increased microgliosis in mice fed a HFD. This was accompanied by an increase in Aβ deposition in the HFD-fed APP/PS1 mice. Together, our results support that HFD-induced obesity exacerbates neuroinflammation and Aβ deposition in a young adult AD mouse model, leading to increased memory deficits and cognitive decline in both sexes.
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Affiliation(s)
- Simon W So
- Minneapolis Veterans Affairs Health Care System, Minneapolis, MN 55417, USA
- Department of Neuroscience, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
| | - Kendra M Fleming
- Minneapolis Veterans Affairs Health Care System, Minneapolis, MN 55417, USA
- Department of Neuroscience, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
| | - Joshua P Nixon
- Minneapolis Veterans Affairs Health Care System, Minneapolis, MN 55417, USA
- Department of Food Science and Nutrition, University of Minnesota Twin Cities, St. Paul, MN 55108, USA
- Department of Surgery, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Tammy A Butterick
- Minneapolis Veterans Affairs Health Care System, Minneapolis, MN 55417, USA
- Department of Neuroscience, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
- Department of Food Science and Nutrition, University of Minnesota Twin Cities, St. Paul, MN 55108, USA
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Lauritano D, Mastrangelo F, D’Ovidio C, Ronconi G, Caraffa A, Gallenga CE, Frydas I, Kritas SK, Trimarchi M, Carinci F, Conti P. Activation of Mast Cells by Neuropeptides: The Role of Pro-Inflammatory and Anti-Inflammatory Cytokines. Int J Mol Sci 2023; 24:ijms24054811. [PMID: 36902240 PMCID: PMC10002992 DOI: 10.3390/ijms24054811] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Mast cells (MCs) are tissue cells that are derived from bone marrow stem cells that contribute to allergic reactions, inflammatory diseases, innate and adaptive immunity, autoimmunity, and mental disorders. MCs located near the meninges communicate with microglia through the production of mediators such as histamine and tryptase, but also through the secretion of IL-1, IL-6 and TNF, which can create pathological effects in the brain. Preformed chemical mediators of inflammation and tumor necrosis factor (TNF) are rapidly released from the granules of MCs, the only immune cells capable of storing the cytokine TNF, although it can also be produced later through mRNA. The role of MCs in nervous system diseases has been extensively studied and reported in the scientific literature; it is of great clinical interest. However, many of the published articles concern studies on animals (mainly rats or mice) and not on humans. MCs are known to interact with neuropeptides that mediate endothelial cell activation, resulting in central nervous system (CNS) inflammatory disorders. In the brain, MCs interact with neurons causing neuronal excitation with the production of neuropeptides and the release of inflammatory mediators such as cytokines and chemokines. This article explores the current understanding of MC activation by neuropeptide substance P (SP), corticotropin-releasing hormone (CRH), and neurotensin, and the role of pro-inflammatory cytokines, suggesting a therapeutic effect of the anti-inflammatory cytokines IL-37 and IL-38.
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Affiliation(s)
- Dorina Lauritano
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy
| | - Filiberto Mastrangelo
- Department of Clinical and Experimental Medicine, School of Dentistry, University of Foggia, 71100 Foggia, Italy
| | - Cristian D’Ovidio
- Section of Legal Medicine, Department of Medicine and Aging Sciences, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
| | - Gianpaolo Ronconi
- Clinica dei Pazienti del Territorio, Fondazione Policlinico Gemelli, 00185 Rome, Italy
| | | | - Carla E. Gallenga
- Section of Ophthalmology, Department of Biomedical Sciences and Specialist Surgery, University of Ferrara, 44121 Ferrara, Italy
| | - Ilias Frydas
- Department of Parasitology, Aristotle University, 54124 Thessaloniki, Greece
| | - Spyros K. Kritas
- Department of Microbiology and Infectious Diseases, School of Veterinary Medicine, Aristotle University of Thessaloniki, 54124 Macedonia, Greece
| | - Matteo Trimarchi
- Centre of Neuroscience of Milan, Department of Medicine and Surgery, University of Milan, 20122 Milano, Italy
| | - Francesco Carinci
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, 44121 Ferrara, Italy
| | - Pio Conti
- Immunology Division, Postgraduate Medical School, University of Chieti, 66100 Chieti, Italy
- Correspondence:
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11
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Liao YC, Lim YS, Chu PW, Chen SK. Inflammatory Milieu Induces Mitochondrial Alterations and Neuronal Activations in Hypothalamic POMC Neurons in a Time-Dependent Manner. Mol Neurobiol 2023; 60:1164-1178. [PMID: 36417103 DOI: 10.1007/s12035-022-03128-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 11/04/2022] [Indexed: 11/24/2022]
Abstract
Inflammation has been associated with numerous neurological disorders. Inflammatory environments trigger a series of cellular and physiological alterations in the brain. However, how inflammatory milieu affects neuronal physiology and how neuronal alterations progress in the inflammatory environments are not fully understood. In this study, we examined the effects of pro-inflammatory milieu on mitochondrial functions and neuronal activities in the hypothalamic POMC neurons. Treating mHypoA-POMC/GFP1 with the conditioned medium collected from LPS activated macrophage were employed to mimic the inflammatory milieu during hypothalamic inflammation. After a 24-h treatment, intracellular ROS/RNS levels were elevated, and the antioxidant enzymes were reduced. Mitochondrial respiration and mitochondrial functions, including basal respiratory rate, spared respiration capacity, and maximal respiration, were all significantly compromised by inflammatory milieu. Moreover, pro-inflammatory cytokines altered mitochondrial dynamics in a time-dependent manner, resulting in the elongation of mitochondria in POMC neurons after a 24-h treatment. Additionally, the increase of C-Fos and Pomc genes expression indicated that the neurons were activated upon the stimulation of inflammatory environment. This neuronal activation of were confirmed on the LPS-challenged mice. Collectively, a short-term to midterm exposure to inflammatory milieu stimulated metabolic switch and neuronal activation, whereas chronic exposure triggered the elevation of oxidative stress, the decrease of the mitochondrial respiration, and the alterations of mitochondrial dynamics.
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Affiliation(s)
- Yi-Chun Liao
- Institute of Neuroscience, National ChengChi University, No. 64, Sec. 2, Zhinan Rd., Wenshan District, 11605, Taipei, Taiwan
| | - Yeou San Lim
- Institute of Neuroscience, National ChengChi University, No. 64, Sec. 2, Zhinan Rd., Wenshan District, 11605, Taipei, Taiwan
| | - Pei-Wen Chu
- Institute of Neuroscience, National ChengChi University, No. 64, Sec. 2, Zhinan Rd., Wenshan District, 11605, Taipei, Taiwan
| | - Shau-Kwaun Chen
- Institute of Neuroscience, National ChengChi University, No. 64, Sec. 2, Zhinan Rd., Wenshan District, 11605, Taipei, Taiwan.
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12
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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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13
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Areleogbe SE, Peter MU, Oniyide AA, Akintayo CO, Fafure AA, Oyeleke MB, Ajadi IO, Amusa OA, Ayodeji A, Olaniyi KS. Blockade of mineralocorticoid receptor by low-dose spironolactone rescues hypothalamic-ovarian dysfunction in PCOS experimental rat model. ENDOCRINE AND METABOLIC SCIENCE 2022. [DOI: 10.1016/j.endmts.2022.100123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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14
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Natrus L, Osadchuk Y, Lisakovska O, Roch T, Babel N, Klys Y, Labudzynskyi D, Chaikovsky Y. Regulation of the apoptosis/autophagy switch by propionic acid in ventromedial hypothalamus of rats with type 2 diabetes mellitus. Heliyon 2022; 8:e11529. [DOI: 10.1016/j.heliyon.2022.e11529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 06/07/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022] Open
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15
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Clerbaux LA, Albertini MC, Amigó N, Beronius A, Bezemer GFG, Coecke S, Daskalopoulos EP, del Giudice G, Greco D, Grenga L, Mantovani A, Muñoz A, Omeragic E, Parissis N, Petrillo M, Saarimäki LA, Soares H, Sullivan K, Landesmann B. Factors Modulating COVID-19: A Mechanistic Understanding Based on the Adverse Outcome Pathway Framework. J Clin Med 2022; 11:4464. [PMID: 35956081 PMCID: PMC9369763 DOI: 10.3390/jcm11154464] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 12/10/2022] Open
Abstract
Addressing factors modulating COVID-19 is crucial since abundant clinical evidence shows that outcomes are markedly heterogeneous between patients. This requires identifying the factors and understanding how they mechanistically influence COVID-19. Here, we describe how eleven selected factors (age, sex, genetic factors, lipid disorders, heart failure, gut dysbiosis, diet, vitamin D deficiency, air pollution and exposure to chemicals) influence COVID-19 by applying the Adverse Outcome Pathway (AOP), which is well-established in regulatory toxicology. This framework aims to model the sequence of events leading to an adverse health outcome. Several linear AOPs depicting pathways from the binding of the virus to ACE2 up to clinical outcomes observed in COVID-19 have been developed and integrated into a network offering a unique overview of the mechanisms underlying the disease. As SARS-CoV-2 infectibility and ACE2 activity are the major starting points and inflammatory response is central in the development of COVID-19, we evaluated how those eleven intrinsic and extrinsic factors modulate those processes impacting clinical outcomes. Applying this AOP-aligned approach enables the identification of current knowledge gaps orientating for further research and allows to propose biomarkers to identify of high-risk patients. This approach also facilitates expertise synergy from different disciplines to address public health issues.
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Affiliation(s)
- Laure-Alix Clerbaux
- European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy; (S.C.); (E.P.D.); (N.P.); (M.P.); (B.L.)
| | | | - Núria Amigó
- Biosfer Teslab SL., 43204 Reus, Spain;
- Department of Basic Medical Sciences, Universitat Rovira i Virgili (URV), 23204 Reus, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Anna Beronius
- Institute of Environmental Medicine, Karolinska Institutet, 17177 Stockholm, Sweden;
| | - Gillina F. G. Bezemer
- Impact Station, 1223 JR Hilversum, The Netherlands;
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Sandra Coecke
- European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy; (S.C.); (E.P.D.); (N.P.); (M.P.); (B.L.)
| | - Evangelos P. Daskalopoulos
- European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy; (S.C.); (E.P.D.); (N.P.); (M.P.); (B.L.)
| | - Giusy del Giudice
- Finnish Hub for Development and Validation of Integrated Approaches (FHAIVE), Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland; (G.d.G.); (D.G.); (L.A.S.)
| | - Dario Greco
- Finnish Hub for Development and Validation of Integrated Approaches (FHAIVE), Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland; (G.d.G.); (D.G.); (L.A.S.)
| | - Lucia Grenga
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, SPI, F-30200 Bagnols-sur-Ceze, France;
| | - Alberto Mantovani
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, 00161 Rome, Italy;
| | - Amalia Muñoz
- European Commission, Joint Research Centre (JRC), 2440 Geel, Belgium;
| | - Elma Omeragic
- Faculty of Pharmacy, University of Sarajevo, 71000 Sarajevo, Bosnia and Herzegovina;
| | - Nikolaos Parissis
- European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy; (S.C.); (E.P.D.); (N.P.); (M.P.); (B.L.)
| | - Mauro Petrillo
- European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy; (S.C.); (E.P.D.); (N.P.); (M.P.); (B.L.)
| | - Laura A. Saarimäki
- Finnish Hub for Development and Validation of Integrated Approaches (FHAIVE), Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland; (G.d.G.); (D.G.); (L.A.S.)
| | - Helena Soares
- Laboratory of Immunobiology and Pathogenesis, Chronic Diseases Research Centre, Faculdade de Ciências Médicas Medical School, University of Lisbon, 1649-004 Lisbon, Portugal;
| | - Kristie Sullivan
- Physicians Committee for Responsible Medicine, Washington, DC 20016, USA;
| | - Brigitte Landesmann
- European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy; (S.C.); (E.P.D.); (N.P.); (M.P.); (B.L.)
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16
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Coker CR, White M, Singal A, Bingaman SS, Paul A, Arnold AC, Silberman Y. Minocycline Reduces Hypothalamic Microglia Activation and Improves Metabolic Dysfunction in High Fat Diet-Induced Obese Mice. Front Physiol 2022; 13:933706. [PMID: 35784876 PMCID: PMC9244633 DOI: 10.3389/fphys.2022.933706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 05/27/2022] [Indexed: 01/27/2023] Open
Abstract
Obesity is associated with insulin resistance, glucose intolerance, inflammation, and altered neuronal activity in brain regions controlling metabolic functions including food intake, energy expenditure, and glucose homeostasis, such as the hypothalamus. In this study, we tested the hypothesis that inhibiting inflammation with minocycline could reduce adverse metabolic consequences associated with high-fat diet (HFD)-induced obesity in mice and sought to determine if metabolic improvements were associated with reduced hypothalamic microglia activity. Male C57Bl/6J mice were placed on 60% HFD for 12 weeks, with minocycline (40 mg/kg, p.o.) or normal tap water given during the last 6 weeks of diet. Age-matched mice maintained on control diet were used as an additional comparator group. Metabolic function was assessed during the last week of treatment. Ramified (resting) and non-ramified (active) microglia were quantified in the hypothalamus following immunohistochemical staining of ionized calcium-binding adaptor 1 (Iba-1) and further assessed by RNAseq. In HFD fed mice, minocycline attenuated body mass and adiposity without altering food intake suggesting enhanced energy expenditure. Minocycline also attenuated hyperinsulinemia and improved insulin sensitivity in HFD mice. Increased microglial activation and autophagy gene network changes were observed in the paraventricular nucleus (PVN) of the hypothalamus of HFD mice, which was prevented by minocycline treatment. Contrary to PVN findings, there were no significant effects of either HFD or minocycline on microglia activation in the hypothalamic arcuate nucleus or central amygdala. Together, these findings suggest that minocycline improves HFD-induced weight gain and insulin resistance in part by reducing inflammatory processes in the PVN, a key hypothalamic region regulating metabolic function.
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Affiliation(s)
- Caitlin R. Coker
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University, Hershey, PA, United States
- Department of Biochemistry and Molecular and Cellular Biology, Georgetown University School of Medicine, Washington, DC, United States
| | - Melissa White
- Department of Comparative Medicine, College of Medicine, Pennsylvania State University, Hershey, PA, United States
| | - Aneesh Singal
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University, Hershey, PA, United States
| | - Sarah S. Bingaman
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University, Hershey, PA, United States
| | - Anirban Paul
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University, Hershey, PA, United States
| | - Amy C. Arnold
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University, Hershey, PA, United States
| | - Yuval Silberman
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University, Hershey, PA, United States
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17
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Szalanczy AM, Key CCC, Woods LCS. Genetic variation in satiety signaling and hypothalamic inflammation: merging fields for the study of obesity. J Nutr Biochem 2022; 101:108928. [PMID: 34936921 PMCID: PMC8959400 DOI: 10.1016/j.jnutbio.2021.108928] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 11/08/2021] [Accepted: 12/01/2021] [Indexed: 02/07/2023]
Abstract
Although obesity has been a longstanding health crisis, the genetic architecture of the disease remains poorly understood. Genome-wide association studies have identified many genomic loci associated with obesity, with genes being enriched in the brain, particularly in the hypothalamus. This points to the role of the central nervous system (CNS) in predisposition to obesity, and we emphasize here several key genes along the satiety signaling pathway involved in genetic susceptibility. Interest has also risen regarding the chronic, low-grade obesity-associated inflammation, with a growing concern toward inflammation in the hypothalamus as a precursor to obesity. Recent studies have found that genetic variation in inflammatory genes play a role in obesity susceptibility, and we highlight here several key genes. Despite the interest in the genetic variants of these pathways individually, there is a lack of research that investigates the relationship between the two. Understanding the interplay between genetic variation in obesity genes enriched in the CNS and inflammation genes will advance our understanding of obesity etiology and heterogeneity, improve genetic risk prediction analyses, and highlight new drug targets for the treatment of obesity. Additionally, this increased knowledge will assist in physician's ability to develop personalized nutrition and medication strategies for combating the obesity epidemic. Though it often seems to present universally, obesity is a highly individual disease, and there remains a need in the field to develop methods to treat at the individual level.
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18
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Sa M, Park MG, Lee CJ. Role of Hypothalamic Reactive Astrocytes in Diet-Induced Obesity. Mol Cells 2022; 45:65-75. [PMID: 35236781 PMCID: PMC8907000 DOI: 10.14348/molcells.2022.2044] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/07/2022] [Accepted: 01/12/2022] [Indexed: 11/30/2022] Open
Abstract
Hypothalamus is a brain region that controls food intake and energy expenditure while sensing signals that convey information about energy status. Within the hypothalamus, molecularly and functionally distinct neurons work in concert under physiological conditions. However, under pathological conditions such as in diet-induced obesity (DIO) model, these neurons show dysfunctional firing patterns and distorted regulation by neurotransmitters and neurohormones. Concurrently, resident glial cells including astrocytes dramatically transform into reactive states. In particular, it has been reported that reactive astrogliosis is observed in the hypothalamus, along with various neuroinflammatory signals. However, how the reactive astrocytes control and modulate DIO by influencing neighboring neurons is not well understood. Recently, new lines of evidence have emerged indicating that these reactive astrocytes directly contribute to the pathology of obesity by synthesizing and tonically releasing the major inhibitory transmitter GABA. The released GABA strongly inhibits the neighboring neurons that control energy expenditure. These surprising findings shed light on the interplay between reactive astrocytes and neighboring neurons in the hypothalamus. This review summarizes recent discoveries related to the functions of hypothalamic reactive astrocytes in obesity and raises new potential therapeutic targets against obesity.
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Affiliation(s)
- Moonsun Sa
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
- Center for Cognition and Sociality, Institute for Basic Science (IBS), Daejeon 34126, Korea
| | - Mingu Gordon Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
- Center for Cognition and Sociality, Institute for Basic Science (IBS), Daejeon 34126, Korea
| | - C. Justin Lee
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
- Center for Cognition and Sociality, Institute for Basic Science (IBS), Daejeon 34126, Korea
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19
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Rijal S, Jang SH, Cho DH, Han SK. Hydrogen peroxide suppresses excitability of gonadotropin-releasing hormone neurons in adult mouse. Front Endocrinol (Lausanne) 2022; 13:939699. [PMID: 36387844 PMCID: PMC9650413 DOI: 10.3389/fendo.2022.939699] [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: 05/09/2022] [Accepted: 10/14/2022] [Indexed: 11/13/2022] Open
Abstract
It has been reported that reactive oxygen species (ROS) derived from oxygen molecule reduction can interfere with the cross-talk between the hypothalamic-pituitary-gonadal (HPG) axis and other endocrine axes, thus affecting fertility. Furthermore, ROS have been linked to GnRH receptor signaling in gonadotropes involved in gonadotropin release. There has been evidence that ROS can interfere with the HPG axis and gonadotropin release at various levels. However, the direct effect of ROS on gonadotropin-releasing hormone (GnRH) neuron remains unclear. Thus, the objective of this study was to determine the effect of hydrogen peroxide (H2O2), an ROS source, on GnRH neuronal excitabilities in transgenic GnRH-green fluorescent protein-tagged mice using the whole-cell patch-clamp electrophysiology. In adults, H2O2 at high concentrations (mM level) hyperpolarized most GnRH neurons tested, whereas low concentrations (pM to μM) caused slight depolarization. In immature GnRH neurons, H2O2 exposure induced excitation. The sensitivity of GnRH neurons to H2O2 was increased with postnatal development. The effect of H2O2 on adult female GnRH neurons was found to be estrous cycle-dependent. Hyperpolarization mediated by H2O2 persisted in the presence of tetrodotoxin, a voltage-gated Na+ channel blocker, and amino-acids receptor blocking cocktail containing blockers for the ionotropic glutamate receptors, glycine receptors, and GABAA receptors, indicating that H2O2 could act on GnRH neurons directly. Furthermore, glibenclamide, an ATP-sensitive K+ (KATP) channel blocker, completely blocked H2O2-mediated hyperpolarization. Increasing endogenous H2O2 by inhibiting glutathione peroxidase decreased spontaneous activities of most GnRH neurons. We conclude that ROS can act as signaling molecules for regulating GnRH neuron's excitability and that adult GnRH neurons are sensitive to increased ROS concentration. Results of this study demonstrate that ROS have direct modulatory effects on the HPG axis at the hypothalamic level to regulate GnRH neuron's excitabilities.
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Affiliation(s)
- Santosh Rijal
- Department of Oral Physiology, School of Dentistry and Institute of Oral Bioscience, Jeonbuk National University, Jeonju, South Korea
| | - Seon Hui Jang
- Department of Oral Physiology, School of Dentistry and Institute of Oral Bioscience, Jeonbuk National University, Jeonju, South Korea
| | - Dong Hyu Cho
- Department of Obstetrics and Gynecology, Jeonbuk National University Medical School, Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute for Medical Sciences, Jeonbuk National University Hospital, Jeonju, South Korea
- *Correspondence: Dong Hyu Cho, ; Seong Kyu Han,
| | - Seong Kyu Han
- Department of Oral Physiology, School of Dentistry and Institute of Oral Bioscience, Jeonbuk National University, Jeonju, South Korea
- *Correspondence: Dong Hyu Cho, ; Seong Kyu Han,
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20
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Polat S, Caner A. TRANSGENERATIONAL IMPACT OF TOPICAL STEROID APPLICATION ON SUPEROXIDE DISMUTASE ACTIVITIES OF HYPOTHALAMUS-PITUITARY-ADRENAL AXIS IN RATS. Can J Physiol Pharmacol 2021; 100:386-392. [PMID: 34826257 DOI: 10.1139/cjpp-2021-0493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Topical steroids(TS) are widely prescribed since the 1950s.This study aimed to investigate the transgenerational effects of TS on the antioxidant mechanism of the hypothalamus-pituitary-adrenal(HPA) axis,both in prenatal and infancy for the first time. Three generations(F1, F2 and F3) and prenatal group(P) were investigated in both sexes with two different time points; P45th and P75th day were accepted as puberty and early adulthood,respectively.Clobetasol propionate 0.05% was used as TS.qRT-PCR was performed to expressional analyses of Sod1, Sod2, and Sod3 genes in the HPA tissues. The Sods mRNA expression of the HPA belonging to P and F1 groups revealed similar results in both genders. The downregulation in the adrenal Sod level was determined in P and F1, F2, and F3 generations in both gender, especially in females(p<0.05).Sods activities in the pituitary of all groups were downregulated in female rats(p<0.05).Interestingly,in male rats,Sod2 and Sod3 weren't expressed in the pituitary compare to control on the day P45 while Sod2 and Sod3 expressions were determined in all the groups on the day P75.Sod1 overexpression found in pituitary and hypothalamus of male in F3 generation. This study showed that TS applied in infancy had a transgenerational adverse effect on antioxidant defense mechanisms especially in the adrenal.
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Affiliation(s)
- Seher Polat
- Erzincan University, 162315, Medical Genetics, Basbaglar Mah, Erzincan, Turkey, 24100;
| | - Armağan Caner
- Erciyes Universitesi Tip Fakultesi, 64212, Biophysics, Kayseri, Kayseri, Turkey;
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21
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Banerjee A, Mukherjee S, Maji BK. Worldwide flavor enhancer monosodium glutamate combined with high lipid diet provokes metabolic alterations and systemic anomalies: An overview. Toxicol Rep 2021; 8:938-961. [PMID: 34026558 PMCID: PMC8120859 DOI: 10.1016/j.toxrep.2021.04.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 04/20/2021] [Accepted: 04/25/2021] [Indexed: 12/13/2022] Open
Abstract
Flavor enhancing high lipid diet acts as silent killer. Monosodium glutamate mixed with high lipid diet alters redox-status. Monosodium glutamate mixed with high lipid diet induces systemic anomalies.
In this fast-food era, people depend on ready-made foods and engage in minimal physical activities that ultimately change their food habits. Majorities of such foods have harmful effects on human health due to higher percentages of saturated fatty acids, trans-fatty acids, and hydrogenated fats in the form of high lipid diet (HLD). Moreover, food manufacturers add monosodium glutamate (MSG) to enhance the taste and palatability of the HLD. Both MSG and HLD induce the generation of reactive oxygen species (ROS) and thereby alter the redox-homeostasis to cause systemic damage. However, MSG mixed HLD (MH) consumption leads to dyslipidemia, silently develops non-alcoholic fatty liver disease followed by metabolic alterations and systemic anomalies, even malignancies, via modulating different signaling pathways. This comprehensive review formulates health care strategies to create global awareness about the harmful impact of MH on the human body and recommends the daily consumption of more natural foods rich in antioxidants instead of toxic ingredients to counterbalance the MH-induced systemic anomalies.
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22
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Late-life intermittent fasting decreases aging-related frailty and increases renal hydrogen sulfide production in a sexually dimorphic manner. GeroScience 2021; 43:1527-1554. [PMID: 33675469 PMCID: PMC8492807 DOI: 10.1007/s11357-021-00330-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 01/25/2021] [Indexed: 12/19/2022] Open
Abstract
Global average life expectancy continues to rise. As aging increases the likelihood of frailty, which encompasses metabolic, musculoskeletal, and cognitive deficits, there is a need for effective anti-aging treatments. It is well established in model organisms that dietary restriction (DR), such as caloric restriction or protein restriction, enhances health and lifespan. However, DR is not widely implemented in the clinic due to patient compliance and its lack of mechanistic underpinnings. Thus, the present study tested the effects of a somewhat more clinically applicable and adoptable DR regimen, every-other-day (EOD) intermittent fasting, on frailty in 20-month-old male and female C57BL/6 mice. Frailty was determined by a series of metabolic, musculoskeletal, and cognitive tasks performed prior to and toward the end of the 2.5-month dietary intervention. Late-life EOD fasting attenuated overall energy intake, hypothalamic inflammatory gene expression, and frailty in males. However, it failed to reduce overall caloric intake and had a little positive effect in females. Given that the selected benefits of DR are dependent on augmented production of the gasotransmitter hydrogen sulfide (H2S) and that renal H2S production declines with age, we tested the effects of EOD fasting on renal H2S production capacity and its connection to frailty in males. EOD fasting boosted renal H2S production, which positively correlated with improvements in multiple components of frailty tasks. Therefore, late-life initiated EOD fasting is sufficient to reduce aging-related frailty, at least in males, and suggests that renal H2S production capacity may modulate the effects of late-life EOD fasting on frailty.
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23
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Wu Z, Xi P, Zhang Y, Wang H, Xue J, Sun X, Tian D. LKB1 up-regulation inhibits hypothalamic inflammation and attenuates diet-induced obesity in mice. Metabolism 2021; 116:154694. [PMID: 33358943 DOI: 10.1016/j.metabol.2020.154694] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Diet-induced obesity (DIO) is associated with chronic, low-grade inflammation in the hypothalamus. The inflammatory pathway of the hypothalamus is activated during obesity, and inhibition of activation of the inflammatory pathway can partially reverse obesity. Therefore, exploring new targets for inhibiting hypothalamic inflammation will provide new ideas for the prevention and treatment of obesity. Liver kinase B1 (LKB1), a serine/threonine kinase, is a tumor suppressor and metabolic regulator. Recent studies have shown that LKB1 has a certain anti-inflammatory effect. However, a role of LKB1 in the regulation of hypothalamic inflammation remains unclear. Therefore, we examined whether LKB1 overexpression in the hypothalamus could weaken the hypothalamic inflammation and inhibit the development of obesity. METHODS LKB1 overexpressing adeno-associated virus (AAV) particles were injected stereotactically into the third ventricle (3 V) of C57BL/6 mice fed with HFD. We assessed changes in body mass and adiposity, food intake, hypothalamic inflammatory markers, and energy and glucose metabolism. RESULTS LKB1 up-regulation in hypothalamus attenuated diet-induced hypothalamic inflammation, reduced food intake and body weight gain. In addition, the overexpression of hypothalamic LKB1 increased the insulin sensitivity and improved whole-body lipid metabolism, which attenuated hepatic fat accumulation and serum lipid levels. CONCLUSION Hypothalamic LKB1 up-regulation attenuates hypothalamic inflammation, and protects against hypothalamic inflammation induced damage to melanocortin system, resulting in lower food intake and lower fat mass accumulation, which consequently protects mice from the development of obesity. Our data suggest LKB1 as a novel negative regulator of hypothalamic inflammation, and also a potentially important target for treating other inflammatory diseases.
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Affiliation(s)
- Zhaoxia Wu
- Department of Clinical Laboratory Diagnostics, Tianjin Medical University, Tianjin 300203, China
| | - Pengjiao Xi
- Department of Clinical Laboratory Diagnostics, Tianjin Medical University, Tianjin 300203, China
| | - Yan Zhang
- Department of Clinical Laboratory Diagnostics, Tianjin Medical University, Tianjin 300203, China
| | - Haomin Wang
- Department of Human Anatomy and Histology, Tianjin Medical University, Tianjin 300070, China
| | - Jie Xue
- Department of Human Anatomy and Histology, Tianjin Medical University, Tianjin 300070, China
| | - Xuguo Sun
- Department of Clinical Laboratory Diagnostics, Tianjin Medical University, Tianjin 300203, China
| | - Derun Tian
- Department of Clinical Laboratory Diagnostics, Tianjin Medical University, Tianjin 300203, China; Department of Human Anatomy and Histology, Tianjin Medical University, Tianjin 300070, China.
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Kogel V, Trinh S, Gasterich N, Beyer C, Seitz J. Long-Term Glucose Starvation Induces Inflammatory Responses and Phenotype Switch in Primary Cortical Rat Astrocytes. J Mol Neurosci 2021; 71:2368-2382. [PMID: 33580474 PMCID: PMC8585803 DOI: 10.1007/s12031-021-01800-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 01/15/2021] [Indexed: 12/18/2022]
Abstract
Astrocytes are the most abundant cell type in the brain and crucial to ensure the metabolic supply of neurons and their synapse formation. Overnutrition as present in patients suffering from obesity causes astrogliosis in the hypothalamus. Other diseases accompanied by malnutrition appear to have an impact on the brain and astrocyte function. In the eating disorder anorexia nervosa (AN), patients suffer from undernutrition and develop volume reductions of the cerebral cortex, associated with reduced astrocyte proliferation and cell count. Although an effect on astrocytes and their function has already been shown for overnutrition, their role in long-term undernutrition remains unclear. The present study used primary rat cerebral cortex astrocytes to investigate their response to chronic glucose starvation. Cells were grown with a medium containing a reduced glucose concentration (2 mM) for 15 days. Long-term glucose starvation increased the expression of a subset of pro-inflammatory genes and shifted the primary astrocyte population to the pro-inflammatory A1-like phenotype. Moreover, genes encoding for proteins involved in the unfolded protein response were elevated. Our findings demonstrate that astrocytes under chronic glucose starvation respond with an inflammatory reaction. With respect to the multiple functions of astrocytes, an association between elevated inflammatory responses due to chronic starvation and alterations found in the brain of patients suffering from undernutrition seems possible.
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Affiliation(s)
- Vanessa Kogel
- Institute of Neuroanatomy, RWTH Aachen University, 52074, Aachen, Germany.
| | - Stefanie Trinh
- Institute of Neuroanatomy, RWTH Aachen University, 52074, Aachen, Germany
| | - Natalie Gasterich
- Institute of Neuroanatomy, RWTH Aachen University, 52074, Aachen, Germany
| | - Cordian Beyer
- Institute of Neuroanatomy, RWTH Aachen University, 52074, Aachen, Germany
| | - Jochen Seitz
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, RWTH Aachen University, 52074, Aachen, Germany
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Abstract
Obesity, which has long since reached epidemic proportions worldwide, is associated with long-term stress to a variety of organs and results in diseases including type 2 diabetes. In the brain, overnutrition induces hypothalamic stress associated with the activation of several signalling pathways, together with central insulin and leptin resistance. This central action of nutrient overload appears very rapidly, suggesting that nutrition-induced hypothalamic stress is a major upstream initiator of obesity and associated diseases. The cellular response to nutrient overload includes the activation of the stress-activated c-Jun N-terminal kinases (JNKs) JNK1, JNK2 and JNK3, which are widely expressed in the brain. Here, we review recent findings on the regulation and effects of these kinases, with particular focus on the hypothalamus, a key brain region in the control of energy and glucose homeostasis. JNK1 blocks the hypothalamic-pituitary-thyroid axis, reducing energy expenditure and promoting obesity. Recently, opposing roles have been identified for JNK1 and JNK3 in hypothalamic agouti gene-related protein (AgRP) neurons: while JNK1 activation in AgRP neurons induces feeding and weight gain and impairs insulin and leptin signalling, JNK3 (also known as MAPK10) deletion in the same neuronal population produces very similar effects. The opposing roles of these kinases, and the unknown role of hypothalamic JNK2, reflect the complexity of JNK biology. Future studies should address the specific function of each kinase, not only in different neuronal subsets, but also in non-neuronal cells in the central nervous system. Decoding the puzzle of brain stress kinases will help to define the central stimuli and mechanisms implicated in the control of energy balance. Graphical abstract.
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Affiliation(s)
- Rubén Nogueiras
- Department of Physiology, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela, Spain
- Galician Agency of Innovation (GAIN), Xunta de Galicia, Santiago de Compostela, Spain
| | - Guadalupe Sabio
- Department of Myocardial Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.
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26
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van der Zande HJ, Gonzalez MA, de Ruiter K, Wilbers RH, García‐Tardón N, van Huizen M, van Noort K, Pelgrom LR, Lambooij JM, Zawistowska‐Deniziak A, Otto F, Ozir‐Fazalalikhan A, van Willigen D, Welling M, Poles J, van Leeuwen F, Hokke CH, Schots A, Yazdanbakhsh M, Loke P, Guigas B. The helminth glycoprotein omega-1 improves metabolic homeostasis in obese mice through type 2 immunity-independent inhibition of food intake. FASEB J 2021; 35:e21331. [PMID: 33476078 PMCID: PMC7898285 DOI: 10.1096/fj.202001973r] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/27/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023]
Abstract
Type 2 immunity plays an essential role in the maintenance of metabolic homeostasis and its disruption during obesity promotes meta-inflammation and insulin resistance. Infection with the helminth parasite Schistosoma mansoni and treatment with its soluble egg antigens (SEA) induce a type 2 immune response in metabolic organs and improve insulin sensitivity and glucose tolerance in obese mice, yet, a causal relationship remains unproven. Here, we investigated the effects and underlying mechanisms of the T2 ribonuclease omega-1 (ω1), one of the major S mansoni immunomodulatory glycoproteins, on metabolic homeostasis. We show that treatment of obese mice with plant-produced recombinant ω1, harboring similar glycan motifs as present on the native molecule, decreased body fat mass, and improved systemic insulin sensitivity and glucose tolerance in a time- and dose-dependent manner. This effect was associated with an increase in white adipose tissue (WAT) type 2 T helper cells, eosinophils, and alternatively activated macrophages, without affecting type 2 innate lymphoid cells. In contrast to SEA, the metabolic effects of ω1 were still observed in obese STAT6-deficient mice with impaired type 2 immunity, indicating that its metabolic effects are independent of the type 2 immune response. Instead, we found that ω1 inhibited food intake, without affecting locomotor activity, WAT thermogenic capacity or whole-body energy expenditure, an effect also occurring in leptin receptor-deficient obese and hyperphagic db/db mice. Altogether, we demonstrate that while the helminth glycoprotein ω1 can induce type 2 immunity, it improves whole-body metabolic homeostasis in obese mice by inhibiting food intake via a STAT6-independent mechanism.
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Affiliation(s)
| | - Michael A. Gonzalez
- Department of MicrobiologyNew York University School of MedicineNew YorkNYUSA
| | - Karin de Ruiter
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | - Ruud H.P. Wilbers
- Department Laboratory of NematologyWageningen University and ResearchWageningenThe Netherlands
| | - Noemí García‐Tardón
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | - Mariska van Huizen
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | - Kim van Noort
- Department Laboratory of NematologyWageningen University and ResearchWageningenThe Netherlands
| | - Leonard R. Pelgrom
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | - Joost M. Lambooij
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | - Anna Zawistowska‐Deniziak
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
- Witold Stefański Institute of ParasitologyPolish Academy of SciencesWarsawPoland
| | - Frank Otto
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | | | - Danny van Willigen
- Interventional Molecular Imaging LaboratoryDepartment of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Mick Welling
- Interventional Molecular Imaging LaboratoryDepartment of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Jordan Poles
- Department of MicrobiologyNew York University School of MedicineNew YorkNYUSA
| | - Fijs van Leeuwen
- Interventional Molecular Imaging LaboratoryDepartment of RadiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Cornelis H. Hokke
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | - Arjen Schots
- Department Laboratory of NematologyWageningen University and ResearchWageningenThe Netherlands
| | - Maria Yazdanbakhsh
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
| | - P'ng Loke
- Department of MicrobiologyNew York University School of MedicineNew YorkNYUSA
- Laboratory of Parasitic DiseasesNational Institute of Allergy and Infectious DiseasesNational Institutes of HealthBethesdaMDUSA
| | - Bruno Guigas
- Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
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Coker CR, Keller BN, Arnold AC, Silberman Y. Impact of High Fat Diet and Ethanol Consumption on Neurocircuitry Regulating Emotional Processing and Metabolic Function. Front Behav Neurosci 2021; 14:601111. [PMID: 33574742 PMCID: PMC7870708 DOI: 10.3389/fnbeh.2020.601111] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 12/28/2020] [Indexed: 01/12/2023] Open
Abstract
The prevalence of psychiatry disorders such as anxiety and depression has steadily increased in recent years in the United States. This increased risk for anxiety and depression is associated with excess weight gain, which is often due to over-consumption of western diets that are typically high in fat, as well as with binge eating disorders, which often overlap with overweight and obesity outcomes. This finding suggests that diet, particularly diets high in fat, may have important consequences on the neurocircuitry regulating emotional processing as well as metabolic functions. Depression and anxiety disorders are also often comorbid with alcohol and substance use disorders. It is well-characterized that many of the neurocircuits that become dysregulated by overconsumption of high fat foods are also involved in drug and alcohol use disorders, suggesting overlapping central dysfunction may be involved. Emerging preclinical data suggest that high fat diets may be an important contributor to increased susceptibility of binge drug and ethanol intake in animal models, suggesting diet could be an important aspect in the etiology of substance use disorders. Neuroinflammation in pivotal brain regions modulating metabolic function, food intake, and binge-like behaviors, such as the hypothalamus, mesolimbic dopamine circuits, and amygdala, may be a critical link between diet, ethanol, metabolic dysfunction, and neuropsychiatric conditions. This brief review will provide an overview of behavioral and physiological changes elicited by both diets high in fat and ethanol consumption, as well as some of their potential effects on neurocircuitry regulating emotional processing and metabolic function.
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Affiliation(s)
- Caitlin R. Coker
- Biochemistry and Molecular & Cellular Biology, Georgetown University School of Medicine, Washington, DC, United States
| | - Bailey N. Keller
- Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA, United States
| | - Amy C. Arnold
- Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA, United States
| | - Yuval Silberman
- Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA, United States
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28
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Ma Q, Deng P, Lin M, Yang L, Li L, Guo L, Zhang L, He M, Lu Y, Pi H, Zhang Y, Yu Z, Chen C, Zhou Z. Long-term bisphenol A exposure exacerbates diet-induced prediabetes via TLR4-dependent hypothalamic inflammation. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123926. [PMID: 33254826 DOI: 10.1016/j.jhazmat.2020.123926] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 06/12/2023]
Abstract
Bisphenol A (BPA), an environmental endocrine-disrupting compound, has been revealed associated with metabolic disorders such as obesity, prediabetes, and type 2 diabetes (T2D). However, its underlying mechanisms are still not fully understood. Here, we provide new evidence that BPA is a risk factor for T2D from a case-control study. To explore the detailed mechanisms, we used two types of diet models, standard diet (SD) and high-fat diet (HFD), to study the effects of long-term BPA exposure on prediabetes in 4-week-old mice. We found that BPA exposure for 12 weeks exacerbated HFD-induced prediabetic symptoms. Female mice showed increased body mass, serum insulin level, and impaired glucose tolerance, while male mice only exhibited impaired glucose tolerance. No change was found in SD-fed mice. Besides, BPA exposure enhanced astrocyte-dependent hypothalamic inflammation in both male and female mice, which impaired proopiomelanocortin (POMC) neuron functions. Moreover, eliminating inflammation by toll-like receptor 4 (TLR4) knockout significantly abolished the effects of BPA on the hypothalamus and diet-induced prediabetes. Taken together, our data establish a key role for TLR4-dependent hypothalamic inflammation in regulating the effects of BPA on prediabetes.
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Affiliation(s)
- Qinlong Ma
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Ping Deng
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Min Lin
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Lingling Yang
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Le Li
- Department of Health Management Center, Southwest Hospital, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Lu Guo
- Department of Neurology, Daping Hospital, Army Medical University (Former Name: Third Military Medical University), Chongqing 400042, People's Republic of China
| | - Lei Zhang
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Mindi He
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Yonghui Lu
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Huifeng Pi
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Yanwen Zhang
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Zhengping Yu
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China
| | - Chunhai Chen
- Department of Occupational Health, Army Medical University (Former Name: Third Military Medical University), Chongqing 400038, People's Republic of China.
| | - Zhou Zhou
- Department of Environmental Medicine, and Department of Emergency Medicine of First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People's Republic of China.
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Yang S, Ke X, Liang H, Li R, Zhu H. Case Report: A Clinical and Genetic Analysis of Childhood Growth Hormone Deficiency With Familial Hypercholesterolemia. Front Endocrinol (Lausanne) 2021; 12:691490. [PMID: 34220717 PMCID: PMC8249922 DOI: 10.3389/fendo.2021.691490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/28/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Growth hormone deficiency (GHD) is a developmental disorder in children characterized by low growth hormone (GH), short stature and unfavorable lipid profiles. Familial hypercholesteremia (FH) is an inborn disorder of low-density lipoprotein cholesterol (LDL-C) metabolism which results in premature cardiovascular events. The co-occurrence of GHD and FH, which may aggravate the hypercholesteremic condition in the affected individuals, had rarely been discussed in previous publication. METHODS This work reports two cases of GHD with FH, and explores the lipid profiles of GHD children and their therapeutic response to recombinant human growth hormone (rhGH). The diagnosis of GHD is based on low peak GH level (<7 ng/mL) in GH provocation test. FH is diagnosed by high LDL-C level (≥ 4 mmol/L) and confirmed genetic mutations in the LDL-C metabolic pathway. We also searched all previously published metabolic studies on GHD children as of December 31, 2020. Information on their LDL-C, duration and dose of rhGH treatment were retrieved and summarized. RESULTS The first case was a 5.3 year-old boy. His height was 103.6 cm (SDS = -2.29) and his peak GH in provocative test was 6.37 ng/mL. Additionally, his LDL-C was 4.80 mmol/L and he harbored a heterozygous mutation for the apolipoprotein B (APOB) gene (c.10579 C > T). The second case was a 9-year-old girl at the height of 117.3 cm (SDS = -2.91). Her GH peaked at 4.99 ng/mL in insulin-induced hypoglycemic test and 2.80 ng/mL in L-dopa test. Her LDL-C was 6.16 mmol/L, and she carried a mutated copy of the low-density lipoprotein receptor (LDLR) gene (c.809 G > A). Literature review indicated that GHD children suffered from higher baseline LDL-C, but it was significantly reduced after rhGH treatment. CONCLUSIONS FH should be considered if a GHD child has remarkably elevated LDL-C that cannot be attributed to low GH level alone. Genetic mutations in the LDL-C metabolic pathway prevent the body from effectively metabolizing lipids, thereby resulting in early-onset hypercholesteremia and probably playing a negative role in children's growth.
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30
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Yen E, Maron JL. Aberrant Feeding and Growth in Neonates With Prenatal Opioid Exposure: Evidence of Neuromodulation and Behavioral Changes. Front Pediatr 2021; 9:805763. [PMID: 35127598 PMCID: PMC8814597 DOI: 10.3389/fped.2021.805763] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 12/28/2021] [Indexed: 11/13/2022] Open
Abstract
Opioid use disorder (OUD) among pregnant women over the last decade has led to more than a fivefold increase in the number of neonates born with withdrawal signs known as Neonatal Abstinence Syndrome (NAS) or Neonatal Opioid Withdrawal Syndrome (NOWS). The impact of prenatal opioid exposure on these neonates remains a public health and research priority due to both its short and long-term effects on offspring. Among the adverse long-term effects associated with OUD is a metabolic syndrome with accompanying cardiovascular comorbidities. The susceptibility to metabolic diseases may begin as early as conception. Neonates born in a setting of prenatal opioid exposure are known to have aberrant early growth, e.g., lower birth weight and smaller head size, and dysregulated feeding behavior that ranges from feeding difficulty to hyperphagia which may predispose these neonates to metabolic syndrome in adulthood. However, studies on this topic are lacking. In this article, we describe the reported association between OUD and metabolic syndrome in adults, animal data linking opioid receptors with the development of diet-induced obesity, the inflammatory modulation of opioids and finally, neonatal salivary transcriptomic data from our laboratory that highlighted the sex-specific impact of opioids on the hypothalamic and reward receptors that regulate feeding behavior in opioid-exposed neonates. There is a great need for future research linking opioids with epigenetic and gene expression changes, as well as neuromodulatory effects in the developing brain, that may underlie the dysregulated feeding, growth, and long-term metabolic and cardiovascular risks for these neonates.
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Affiliation(s)
- Elizabeth Yen
- Mother Infant Research Institute, Tufts Medical Center, Boston, MA, United States.,Department of Pediatrics, Tufts University School of Medicine, Boston, MA, United States
| | - Jill L Maron
- Department of Pediatrics, Women & Infants Hospital of Rhode Island, Providence, RI, United States.,Warren Alpert Medical School of Brown University, Providence, RI, United States
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31
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Dolly A, Dumas JF, Servais S. Cancer cachexia and skeletal muscle atrophy in clinical studies: what do we really know? J Cachexia Sarcopenia Muscle 2020; 11:1413-1428. [PMID: 33053604 PMCID: PMC7749617 DOI: 10.1002/jcsm.12633] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/24/2020] [Accepted: 09/16/2020] [Indexed: 12/16/2022] Open
Abstract
Research investigators have shown a growing interest in investigating alterations underlying skeletal muscle wasting in patients with cancer. However, skeletal muscle dysfunctions associated with cancer cachexia have mainly been studied in preclinical models. In the present review, we summarize the results of clinical studies in which skeletal muscle biopsies were collected from cachectic vs. non-cachectic cancer patients. Most of these studies suggest the presence of significant physiological alterations in skeletal muscle from cachectic cancer patients. We suggest a hypothesis, which connects structural and metabolic parameters that may, at least in part, be responsible for the skeletal muscle atrophy characteristic of cancer cachexia. Finally, we discuss the importance of a better standardization of the diagnostic criteria for cancer cachexia, as well as the requirement for additional clinical studies to improve the robustness of these conclusions.
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Affiliation(s)
- Adeline Dolly
- INSERM UMR 1069, Nutrition Croissance et Cancer, Université de Tours, Tours, France
| | - Jean-François Dumas
- INSERM UMR 1069, Nutrition Croissance et Cancer, Université de Tours, Tours, France
| | - Stéphane Servais
- INSERM UMR 1069, Nutrition Croissance et Cancer, Université de Tours, Tours, France
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32
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Levenberg K, Hajnal A, George DR, Saunders EFH. Prolonged functional cerebral asymmetry as a consequence of dysfunctional parvocellular paraventricular hypothalamic nucleus signaling: An integrative model for the pathophysiology of bipolar disorder. Med Hypotheses 2020; 146:110433. [PMID: 33317848 DOI: 10.1016/j.mehy.2020.110433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 10/14/2020] [Accepted: 11/24/2020] [Indexed: 01/09/2023]
Abstract
Approximately 45 million people worldwide are diagnosed with bipolar disorder (BD). While there are many known risk factors and models of the pathologic processes influencing BD, the exact neurologic underpinnings of BD are unknown. We attempt to integrate the existing literature and create a unifying hypothesis regarding the pathophysiology of BD with the hope that a concrete model may potentially facilitate more specific diagnosis, prevention, and treatment of BD in the future. We hypothesize that dysfunctional signaling from the parvocellular neurons of the paraventricular hypothalamic nucleus (PVN) results in the clinical presentation of BD. Functional damage to this nucleus and its signaling pathways may be mediated by myriad factors (e.g. immune dysregulation and auto-immune processes, polygenetic variation, dysfunctional interhemispheric connections, and impaired or overactivated hypothalamic axes) which could help explain the wide variety of clinical presentations along the BD spectrum. The neurons of the PVN regulate ultradian rhythms, which are observed in cyclic variations in healthy individuals, and mediate changes in functional hemispheric lateralization. Theoretically, dysfunctional PVN signaling results in prolonged functional hemispheric dominance. In this model, prolonged right hemispheric dominance leads to depressive symptoms, whereas left hemispheric dominance correlated to the clinical picture of mania. Subsequently, physiologic processes that increase signaling through the PVN (hypothalamic-pituitaryadrenal axis, hypothalamic- pituitary-gonadal axis, and hypothalamic-pituitary-thyroid axis activity, suprachiasmatic nucleus pathways) as well as, neuro-endocrine induced excito-toxicity, auto-immune and inflammatory flairs may induce mood episodes in susceptible individuals. Potentially, ultradian rhythms slowing with age, in combination with changes in hypothalamic axes and maturation of neural circuitry, accounts for BD clinically presenting more frequently in young adulthood than later in life.
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Affiliation(s)
- Kate Levenberg
- College of Medicine, Penn State University College of Medicine, State College, USA.
| | - Andras Hajnal
- Neural & Behavioral Sciences, Penn State University College of Medicine, State College, USA
| | - Daniel R George
- Department of Humanities, Penn State University College of Medicine, Hershey, USA
| | - Erika F H Saunders
- Psychiatry and Behavioral Health, Penn State University College of Medicine, State College, USA
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Kim JS, Kirkland RA, Lee SH, Cawthon CR, Rzepka KW, Minaya DM, de Lartigue G, Czaja K, de La Serre CB. Gut microbiota composition modulates inflammation and structure of the vagal afferent pathway. Physiol Behav 2020; 225:113082. [PMID: 32682966 DOI: 10.1016/j.physbeh.2020.113082] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 07/02/2020] [Accepted: 07/15/2020] [Indexed: 12/17/2022]
Abstract
Vagal afferent neurons (VAN), located in the nodose ganglion (NG) innervate the gut and terminate in the nucleus of solitary tract (NTS) in the brainstem. They are the primary sensory neurons integrating gut-derived signals to regulate meal size. Chronic high-fat diet (HFD) consumption impairs vagally mediated satiety, resulting in overfeeding. There is evidence that HFD consumption leads to alterations in both vagal nerve function and structural integrity. HFD also leads to marked gut microbiota dysbiosis; in rodent models, dysbiosis is sufficient to induce weight gain. In this study, we investigated the effect of microbiota dysbiosis on gut-brain vagal innervation independently of diet. To do so, we recolonized microbiota-depleted rats with gastrointestinal (GI) contents isolated from donor animals fed either a HFD (45 or 60% fat) or a low fat diet (LFD, 13% fat). We used two different depletion models while maintaining the animals on LFD: 1) conventionally raised Fischer and Wistar rats that underwent a depletion paradigm using an antibiotic cocktail and 2) germ free (GF) raised Fischer rats. Following recolonization, receiver animals were designated as ConvLF and ConvHF. Fecal samples were collected throughout these studies and analyzed via 16S Illumina sequencing. In both models, bacteria that were identified as characteristic of HFD were successfully transferred to recipient animals. Three weeks post-colonization, ConvHF rats showed significant increases in ionized calcium-binding adapter molecule-1 (Iba1) positive immune cells in the NG compared to ConvLF animals. Additionally, using isolectin B4 (IB4) staining to identify c-fibers, we found that, compared to ConvLF animals, ConvHF rats displayed decreased innervation at the level of the medial NTS; c-fibers at this level are believed to be primarily of vagal origin. This alteration in vagal structure was associated with a loss in satiety induced by the gut peptide cholecystokinin (CCK). Increased presence of immunocompetent Iba1+ cells along the gut-brain axis and alterations in NTS innervation were still evident in ConvHF rats compared to ConvLF animals 12 weeks post-colonization and were associated with increases in food intake and body weight (BW). We conclude from these data that microbiota dysbiosis can alter gut-brain vagal innervation, potentially via recruitment and/or activation of immune cells.
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Affiliation(s)
- J S Kim
- Dept. of Foods and Nutrition, USA
| | | | - S H Lee
- Dept. of Foods and Nutrition, USA
| | | | - K W Rzepka
- Dept. of Veterinary Biosciences and Diagnostic Imaging, University of Georgia, Athens, GA, USA
| | - D M Minaya
- Dept. of Veterinary Biosciences and Diagnostic Imaging, University of Georgia, Athens, GA, USA
| | - G de Lartigue
- Dept. of Pharmacodynamics, University of Florida, Gainesville, FL, USA
| | - K Czaja
- Dept. of Veterinary Biosciences and Diagnostic Imaging, University of Georgia, Athens, GA, USA
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Pérez-Pérez A, Vilariño-García T, Guadix P, Dueñas JL, Sánchez-Margalet V. Leptin and Nutrition in Gestational Diabetes. Nutrients 2020; 12:nu12071970. [PMID: 32630697 PMCID: PMC7400219 DOI: 10.3390/nu12071970] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/25/2020] [Accepted: 06/30/2020] [Indexed: 12/12/2022] Open
Abstract
Leptin is highly expressed in the placenta, mainly by trophoblastic cells, where it has an important autocrine trophic effect. Moreover, increased leptin levels are found in the most frequent pathology of pregnancy: gestational diabetes, where leptin may mediate the increased size of the placenta and the fetus, which becomes macrosomic. In fact, leptin mediates the increased protein synthesis, as observed in trophoblasts from gestational diabetic subjects. In addition, leptin seems to facilitate nutrients transport to the fetus in gestational diabetes by increasing the expression of the glycerol transporter aquaporin-9. The high plasma leptin levels found in gestational diabetes may be potentiated by leptin resistance at a central level, and obesity-associated inflammation plays a role in this leptin resistance. Therefore, the importance of anti-inflammatory nutrients to modify the pathology of pregnancy is clear. In fact, nutritional intervention is the first-line approach for the treatment of gestational diabetes mellitus. However, more nutritional intervention studies with nutraceuticals, such as polyphenols or polyunsaturated fatty acids, or nutritional supplementation with micronutrients or probiotics in pregnant women, are needed in order to achieve a high level of evidence. In this context, the Mediterranean diet has been recently found to reduce the risk of gestational diabetes in a multicenter randomized trial. This review will focus on the impact of maternal obesity on placental inflammation and nutrients transport, considering the mechanisms by which leptin may influence maternal and fetal health in this setting, as well as its role in pregnancy pathologies.
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Affiliation(s)
- Antonio Pérez-Pérez
- Department of Medical Biochemistry and Molecular Biology, and Immnology, School of Medicine, Virgen Macarena University Hospital, 41009 Seville, Spain;
- Correspondence: (A.P.-P.); (V.S.-M.); Tel: 34-955008111 (A.P.-P. & V.S.-M.)
| | - Teresa Vilariño-García
- Department of Medical Biochemistry and Molecular Biology, and Immnology, School of Medicine, Virgen Macarena University Hospital, 41009 Seville, Spain;
| | - Pilar Guadix
- Obstetrics and Gynecology Service, Virgen Macarena University Hospital, 41009 Seville, Spain; (P.G.); (J.L.D.)
| | - José L. Dueñas
- Obstetrics and Gynecology Service, Virgen Macarena University Hospital, 41009 Seville, Spain; (P.G.); (J.L.D.)
| | - Víctor Sánchez-Margalet
- Department of Medical Biochemistry and Molecular Biology, and Immnology, School of Medicine, Virgen Macarena University Hospital, 41009 Seville, Spain;
- Correspondence: (A.P.-P.); (V.S.-M.); Tel: 34-955008111 (A.P.-P. & V.S.-M.)
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Lee CH, Suk K, Yu R, Kim MS. Cellular Contributors to Hypothalamic Inflammation in Obesity. Mol Cells 2020; 43:431-437. [PMID: 32392909 PMCID: PMC7264480 DOI: 10.14348/molcells.2020.0055] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 12/16/2022] Open
Abstract
The hypothalamus is a crucial organ for the maintenance of appropriate body fat storage. Neurons in the hypothalamic arcuate nucleus (ARH) detect energy shortage or surplus via the circulating concentrations of metabolic hormones and nutrients, and then coordinate energy intake and expenditure to maintain energy homeostasis. Malfunction or loss of hypothalamic ARH neurons results in obesity. Accumulated evidence suggests that hypothalamic inflammation is a key pathological mechanism that links chronic overconsumption of a high-fat diet (HFD) with the development of obesity and related metabolic complications. Interestingly, overnutrition-induced hypothalamic inflammation occurs specifically in the ARH, where microglia initiate an inflammatory response by releasing proinflammatory cytokines and chemokines in response to excessive fatty acid flux. Upon more prolonged HFD consumption, astrocytes and perivascular macrophages become involved and sustain hypothalamic inflammation. ARH neurons are victims of hypothalamic inflammation, but they may actively participate in hypothalamic inflammation by sending quiescence or stress signals to surrounding glia. In this mini-review, we describe the current state of knowledge regarding the contributions of neurons and glia, and their interactions, to HFD-induced hypothalamic inflammation.
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Affiliation(s)
- Chan Hee Lee
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Kyoungho Suk
- Department of Pharmacology, School of Medicine, Kyungpook National University College of Medicine, Daegu 41944, Korea
| | - Rina Yu
- Department of Food Science and Nutrition, University of Ulsan, Ulsan 44610, Korea
| | - Min-Seon Kim
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
- Division of Endocrinology and Metabolism, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
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Pang D, Yang C, Luo Q, Li C, Liu W, Li L, Zou Y, Feng B, Chen Z, Huang C. Soy isoflavones improve the oxidative stress induced hypothalamic inflammation and apoptosis in high fat diet-induced obese male mice through PGC1-alpha pathway. Aging (Albany NY) 2020; 12:8710-8727. [PMID: 32434959 PMCID: PMC7244041 DOI: 10.18632/aging.103197] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 04/16/2020] [Indexed: 02/05/2023]
Abstract
Obesity is a common metabolic disorder that increases the risk of many diseases, such as type II diabetes, hypertension, cardiovascular disease. Hypothalamus plays a very important role in the progression of obesity, and many studies reveal that hypothalamic injures are implicated in obesity processes. Here, we describe that the consumption of soy isoflavones, with a structural similarity to that of estradiol, could mitigate obesity through improving the hypothalamic inflammation and apoptosis, which are induced by oxidative stress. Also, our in vitro studies demonstrate that daidzein and genistein, common ingredients of soy isoflavones, could protect hypothalamic N42 cells against palmitic acid induced oxidative stress and apoptosis. Moreover, the transcriptional coactivator peroxisome proliferator-activated receptor γ coactivator 1 alpha (PGC1-alpha), which plays a role in oxidative defense, is increased after soy isoflavone treatment in vivo and in vitro, suggesting an improved effect of soy isoflavones on hypothalamic antioxidant defense is mediated by PGC-1α. Our study reveals a potential mechanism of soy isoflavones regulating oxidative stress induced hypothalamic inflammation and cellular apoptosis, which will be important for obesity treatment.
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Affiliation(s)
- Dejiang Pang
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Neuroscience and Metabolism Research, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu 610041, P.R. China
| | - Chengcheng Yang
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Qihui Luo
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Chao, Li
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Wentao Liu
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Lixia Li
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Yuanfeng Zou
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Bin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Zhengli Chen
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
| | - Chao Huang
- Laboratory of Experimental Animal Disease Model, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R. China
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Nabil M, El Demellawy MA, Mahmoud MF, Mahmoud AAA. Prolonged overnutrition with fructose or fat induces metabolic derangements in rats by disrupting the crosstalk between the hypothalamus and periphery: Possible amelioration with fenofibrate. Eur J Pharmacol 2020; 879:173136. [PMID: 32360834 DOI: 10.1016/j.ejphar.2020.173136] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/14/2020] [Accepted: 04/20/2020] [Indexed: 11/15/2022]
Abstract
Metabolic Syndrome (MetS) increases the risk of developing type 2 diabetes mellitus and cardiovascular complications. The crosstalk between the hypothalamus and periphery is vital for regulating food intake and energy homeostasis. However, it is impaired during MetS. The present study aimed to compare the distinct central and peripheral metabolic derangements induced by a high-fructose drink or high-fat diet, as well as the possible intervention by fenofibrate. Rats were divided into five groups: standard chow diet (SCD) group, high-fructose group (FR), high-fat group (HF), FR plus fenofibrate group (FR-F), and HF plus fenofibrate group (HF-F). FR and HF groups showed hyperglycemia, hyperinsulinemia, hypertriglyceridemia, hyperleptinemia, steatosis, and adipocyte hypertrophy. This was associated with elevated circulating levels of proinflammatory cytokines and free fatty acids (FFAs). The latter mediators are involved in the hypothalamic inflammation and dysregulation of signaling cascades that control food intake and glucose homeostasis. The effects were more pronounced in the HF group than FR group, which were matched with the observed higher levels of plasma FFAs and cytokines. Fenofibrate administration improved not only the peripheral metabolic disturbances, but also the central disturbances associated with insulin resistance induced by FR or HF diet. This study sheds light on the pivotal role of the hypothalamus in diet-induced MetS. Furthermore, the study suggests the utmost importance of developing a standardized model of metabolic syndrome in place of the great diversity between available models, which can induce different effects and negatively impact the validity of prospective studies.
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Affiliation(s)
- Mohamed Nabil
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt; Pharmaceutical and Fermentation Industries Development Center (PFIDC), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab, Alexandria, 21934, Egypt
| | - Maha A El Demellawy
- Department of Medical Biotechnology, Genetic Engineering & Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab, Alexandria, 21934, Egypt
| | - Mona F Mahmoud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt
| | - Amr A A Mahmoud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt.
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Debeuf T, Verbeken S, Boelens E, Volkaert B, Van Malderen E, Michels N, Braet C. Emotion regulation training in the treatment of obesity in young adolescents: protocol for a randomized controlled trial. Trials 2020; 21:153. [PMID: 32039739 PMCID: PMC7011608 DOI: 10.1186/s13063-019-4020-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 12/20/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The prevalence rates of childhood obesity are increasing. The current multidisciplinary treatments for (childhood) obesity are effective but only moderately and in the short term. A possible explanation for the onset and maintenance of childhood obesity is that it reflects a maladaptive mechanism for regulating high levels of stress and emotions. Therefore, the current RCT study aims to test the effectiveness of adding an emotion regulation training to care as usual (multidisciplinary obesity treatment) in young inpatients (10-14) involved in an obesity treatment program compared to care as usual alone. The research model for this RCT study states that when high levels of stress are regulated in a maladaptive way, this can contribute to the development of obesity. METHODS The current study will recruit 140 youngsters (10-14 years) who are involved in an inpatient multidisciplinary obesity treatment (MOT) program. After giving consent to participate in the study, youngsters will be randomly assigned, during consecutive waves, to one of two conditions: care as usual (receiving MOT) or intervention (receiving MOT in addition to emotion regulation training). The training itself consists of 12 weekly sessions, followed by a booster session after 3 and 5 months. The participants will be tested pretraining, post-training, and at 6 months' follow-up. We hypothesize that, compared to the control condition, youngsters in the intervention condition will (1) use more adaptive emotion regulation strategies and (2) report less emotional eating, both primary outcome measures. Moreover, on the level of secondary outcome measures, we hypothesize that youngsters in the intervention condition, compared with the control condition, will (3) report better sleep quality, (4) undergo improved weight loss and weight loss maintenance, and (5) experience better long-term (6-months) psychological well-being. DISCUSSION This study will add to both the scientific and clinical literature on the role of emotion regulation in the development and maintenance of different psychopathologies, as emotion regulation is a transdiagnostic factor. TRIAL REGISTRATION The RCT study protocol is registered at ISRCTN Registry, with study ID "ISRCTN 83822934." Registered on 13 December 2017.
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Affiliation(s)
- Taaike Debeuf
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
| | - Sandra Verbeken
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
| | - Elisa Boelens
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
| | - Brenda Volkaert
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
| | - Eva Van Malderen
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
| | - Nathalie Michels
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
| | - Caroline Braet
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
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Deol P, Kozlova E, Valdez M, Ho C, Yang EW, Richardson H, Gonzalez G, Truong E, Reid J, Valdez J, Deans JR, Martinez-Lomeli J, Evans JR, Jiang T, Sladek FM, Curras-Collazo MC. Dysregulation of Hypothalamic Gene Expression and the Oxytocinergic System by Soybean Oil Diets in Male Mice. Endocrinology 2020; 161:5698148. [PMID: 31912136 PMCID: PMC7041656 DOI: 10.1210/endocr/bqz044] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 01/04/2020] [Indexed: 01/04/2023]
Abstract
Soybean oil consumption has increased greatly in the past half-century and is linked to obesity and diabetes. To test the hypothesis that soybean oil diet alters hypothalamic gene expression in conjunction with metabolic phenotype, we performed RNA sequencing analysis using male mice fed isocaloric, high-fat diets based on conventional soybean oil (high in linoleic acid, LA), a genetically modified, low-LA soybean oil (Plenish), and coconut oil (high in saturated fat, containing no LA). The 2 soybean oil diets had similar but nonidentical effects on the hypothalamic transcriptome, whereas the coconut oil diet had a negligible effect compared to a low-fat control diet. Dysregulated genes were associated with inflammation, neuroendocrine, neurochemical, and insulin signaling. Oxt was the only gene with metabolic, inflammation, and neurological relevance upregulated by both soybean oil diets compared to both control diets. Oxytocin immunoreactivity in the supraoptic and paraventricular nuclei of the hypothalamus was reduced, whereas plasma oxytocin and hypothalamic Oxt were increased. These central and peripheral effects of soybean oil diets were correlated with glucose intolerance but not body weight. Alterations in hypothalamic Oxt and plasma oxytocin were not observed in the coconut oil diet enriched in stigmasterol, a phytosterol found in soybean oil. We postulate that neither stigmasterol nor LA is responsible for effects of soybean oil diets on oxytocin and that Oxt messenger RNA levels could be associated with the diabetic state. Given the ubiquitous presence of soybean oil in the American diet, its observed effects on hypothalamic gene expression could have important public health ramifications.
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Affiliation(s)
- Poonamjot Deol
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Elena Kozlova
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
- Neuroscience Graduate Program, University of California, Riverside, California
| | - Matthew Valdez
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
- Neuroscience Graduate Program, University of California, Riverside, California
| | - Catherine Ho
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Ei-Wen Yang
- Department of Computer Science and Engineering, University of California Riverside, California
| | - Holly Richardson
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Gwendolyn Gonzalez
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Edward Truong
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Jack Reid
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Joseph Valdez
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Jonathan R Deans
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Jose Martinez-Lomeli
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Jane R Evans
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Tao Jiang
- Department of Computer Science and Engineering, University of California Riverside, California
| | - Frances M Sladek
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
| | - Margarita C Curras-Collazo
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, California
- Neuroscience Graduate Program, University of California, Riverside, California
- Correspondence: Margarita C. Curras-Collazo, PhD, FAPS, Department of Molecular, Cell and Systems Biology, University of California, 2110 Biological Sciences Building, Riverside, California 92521. E-mail:
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40
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Kang D, Kim HR, Kim KK, Kim DH, Jeong B, Jin S, Park JW, Seong JY, Lee BJ. Brain-specific chemokine FAM19A5 induces hypothalamic inflammation. Biochem Biophys Res Commun 2020; 523:829-834. [PMID: 31954515 DOI: 10.1016/j.bbrc.2019.12.119] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 12/25/2019] [Indexed: 12/20/2022]
Abstract
The cytokine-like protein FAM19A5 is highly expressed in the brain, but little is known about its functions there. Here, we found that FAM19A5 was expressed in mouse hypothalamic cells expressing proopiomelanocortin (POMC) and neuropeptide Y (NPY)/agouti-related peptide (AgRP), and in the microglia. Tumor necrosis factor-α (TNF-α), which induces inflammatory sickness responses, greatly increased hypothalamic expression of FAM19A5. Knockdown of FAM19A5 expression resulted in decreased TNF-α-induced anorexia, body weight loss and TNF-α-induced expression of inflammatory factors. In contrast, intracerebroventricular administration of FAM19A5 induced anorexia, body weight loss and hyperthermia, together with increased expression of inflammatory factors. FAM19A5 injection also induced increases in c-fos activation and POMC mRNA level in hypothalamic POMC neurons. Together, these results suggest that FAM19A5 plays an important role in hypothalamic inflammatory responses.
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Affiliation(s)
- Dasol Kang
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea
| | - Han Rae Kim
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea; Department of Pharmacology and Physiology, School of Medicine & Health Sciences, The George Washington University, USA, 20037
| | - Kwang Kon Kim
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea
| | - Dong Hee Kim
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea
| | - Bora Jeong
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea
| | - Sungho Jin
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea
| | - Jeong Woo Park
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea
| | - Jae Young Seong
- Graduate School of Medicine, Korea University, Seoul, 02841, South Korea
| | - Byung Ju Lee
- Department of Biological Sciences, College of Natural Sciences, University of Ulsan, Ulsan, 44610, South Korea.
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41
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Kim W, Lee W, Huh E, Choi E, Jang YP, Kim YK, Lee TH, Oh MS. Ephedra sinica Stapf and Gypsum Attenuates Heat-Induced Hypothalamic Inflammation in Mice. Toxins (Basel) 2019; 12:toxins12010016. [PMID: 31905825 PMCID: PMC7020418 DOI: 10.3390/toxins12010016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/14/2019] [Accepted: 12/27/2019] [Indexed: 12/26/2022] Open
Abstract
Ephedra sinica Stapf (EH) exert toxic effects, such as excitability, cardiac arrhythmia, and others. On the contrary, in traditional herbal medicine, EH and gypsum (GF) are used most often to treat symptoms caused by external stressors. The hypothalamus plays a crucial role in thermal homeostasis. Inflammatory response in the hypothalamus by thermal stressors may affect thermal and energy homeostasis. This study investigates the effect of EH and GF against heat-induced mouse model. Mice were divided into four groups: saline, saline plus heat, EH plus heat, and GF plus heat treated groups. Heat stress was fixed at 43 °C for 15 min once daily for 3 days. Weight and ear and rectal temperature measurements were made after terminating heat stress. Hypothalamus tissue was collected to evaluate the HSP70, nuclear factor kappa-Β (NF-kB), and interleukin (IL)-1β protein expression levels. EH and GF treatment suppressed the increased body temperature. EH significantly ameliorated heat-induced body weight loss, compared to gypsum. Regulatory effects of EH and GF for body temperature and weight against heat stress were mediated by IL-1β reduction. EH showed significant HSP70 and NF-kB inhibition against heat stress. EH and GF contribute to the inhibition of heat-induced proinflammatory factors and the promotion of hypothalamic homeostasis.
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Affiliation(s)
- Wonnam Kim
- Division of Pharmacology, College of Korean Medicine, Semyung University, 65 Semyung-ro, Jecheon 27136, Korea
| | - Wonil Lee
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
| | - Eugene Huh
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
- Department of Medical Science of Meridian, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
| | - Eunjung Choi
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
| | - Young Pyo Jang
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
- Department of Oriental Pharmaceutical Science, College of Pharmacy Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
| | - Yun-Kyung Kim
- Department of Herbal Medicine, College of Pharmacy, Wonkwang University, 460 Iksan-daero, Iksan 54538, Korea
| | - Tae-Hee Lee
- Department of Formulae Pharmacology, School of Oriental Medicine, Gachon University, 1342 Seongnamdae-ro, Sujeong-gu, Seongnam 13120, Korea
| | - Myung Sook Oh
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
- Department of Oriental Pharmaceutical Science, College of Pharmacy Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
- Kyung Hee East-West Pharmaceutical Research Institute, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
- Correspondence: ; Tel.: +82-2-961-9436
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Liao J, Yang F, Chen H, Yu W, Han Q, Li Y, Hu L, Guo J, Pan J, Liang Z, Tang Z. Effects of copper on oxidative stress and autophagy in hypothalamus of broilers. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 185:109710. [PMID: 31563750 DOI: 10.1016/j.ecoenv.2019.109710] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/21/2019] [Accepted: 09/21/2019] [Indexed: 05/15/2023]
Abstract
The purpose of this research was to discuss the effects of copper (Cu)-induced toxicity on oxidative stress and autophagy in hypothalamus of broilers. In this study, 240 one-day-old broilers were randomly divided into 4 groups and the contents of dietary Cu in 4 groups were 11 mg/kg (control group), 110 mg/kg (group I), 220 mg/kg (group II), and 330 mg/kg (group III). The experiment lasted for 49 days and the hypothalamus tissues were collected for histological observation and detection of Cu content. Additionally, the indicators related to oxidative stress in hypothalamus were determined. Moreover, the mRNA expression levels of autophagy-related genes and the protein expression levels of Beclin1, LC3-II/LC3-I, and p62 in hypothalamus were measured. Results showed that the treated groups were observed vacuolar degeneration in hypothalamus compared to control group, and the Cu content in hypothalamus was increased with the increase of dietary Cu. Furthermore, the activities of SOD, CAT, T-AOC were increased in group I and group II and then decreased in group III, and the content of MDA and the mRNA levels of Nrf2, HO-1, SOD-1, CAT, GCLC, GCLM, and GST in treated groups were elevated compared to control group. Moreover, the mRNA expression levels of Beclin1, Atg5, LC3-I, LC3-II and the protein expression levels of Beclin1 and LC3-II/LC3-I up-regulated significantly with the increasing levels of Cu. However, the mRNA expression levels of p62 and mTOR and the protein expression level of p62 down-regulated remarkably. Taken together, our present study evidenced that excessive intake of Cu could induce oxidative stress and autophagy in hypothalamus of broilers.
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Affiliation(s)
- Jianzhao Liao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China.
| | - Fan Yang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China; Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Huilian Chen
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China
| | - Wenlan Yu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China
| | - Qingyue Han
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China
| | - Ying Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China
| | - Lianmei Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China
| | - Jianying Guo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China
| | - Jiaqiang Pan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China
| | - Zhaoping Liang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China.
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China.
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Zhang M, Ma X, Xu H, Wu W, He X, Wang X, Jiang M, Hou Y, Bai G. A natural AKT inhibitor swertiamarin targets AKT-PH domain, inhibits downstream signaling, and alleviates inflammation. FEBS J 2019; 287:1816-1829. [PMID: 31665825 DOI: 10.1111/febs.15112] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 09/10/2019] [Accepted: 10/29/2019] [Indexed: 01/01/2023]
Abstract
Swertiamarin (SW), a representative component in Flos Lonicerae Japonicae, has been reported to exert significant activity in preventing infections. In this research, we aim to clarify the details of SW and its target to explore SW's underlying anti-inflammatory mechanisms. An azide labeled SW probe was synthesized for protein target fishing, and the results demonstrated that AKT could be captured specifically. Immunofluorescence colocalization with AKT was implemented by a click reaction of the SW probe and alkynyl CY5. The result showed that AKT was one of the targets of SW. Then, a competitive combination experiment using a set of AKT inhibitors and a membrane translocation experiment confirmed that SW might target the pleckstrin homology (PH) domain of AKT. This specific binding directly deactivated the phosphorylation of AKT on both Ser473 and Thr308, which induced the dephosphorylation of IKK and NF-κB. Finally, proinflammatory cytokines (TNF-α, IL-6, and IL-8) were suppressed both in cells and in acute lung injury animal model by targeting AKT-PH domain. This study demonstrated that SW functions as a natural AKT inhibitor and presents significant anti-inflammatory activity by directly regulating the AKT-PH domain and inhibiting downstream inflammatory molecules.
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Affiliation(s)
- Man Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
| | - Xiaoyao Ma
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
| | - Honglei Xu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
| | - Wenbo Wu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
| | - Xin He
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
| | - Xiaoying Wang
- Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Min Jiang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
| | - Yuanyuan Hou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
| | - Gang Bai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, China
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Lee CH, Kim HJ, Lee YS, Kang GM, Lim HS, Lee SH, Song DK, Kwon O, Hwang I, Son M, Byun K, Sung YH, Kim S, Kim JB, Choi EY, Kim YB, Kim K, Kweon MN, Sohn JW, Kim MS. Hypothalamic Macrophage Inducible Nitric Oxide Synthase Mediates Obesity-Associated Hypothalamic Inflammation. Cell Rep 2019; 25:934-946.e5. [PMID: 30355499 PMCID: PMC6284237 DOI: 10.1016/j.celrep.2018.09.070] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 06/13/2018] [Accepted: 09/21/2018] [Indexed: 02/08/2023] Open
Abstract
Obesity-associated metabolic alterations are closely linked to low-grade
inflammation in peripheral organs, in which macrophages play a central role.
Using genetic labeling of myeloid lineage cells, we show that hypothalamic
macrophages normally reside in the perivascular area and circumventricular organ
median eminence. Chronic consumption of a high-fat diet (HFD) induces expansion
of the monocyte-derived macrophage pool in the hypothalamic arcuate nucleus
(ARC), which is significantly attributed to enhanced proliferation of
macrophages. Notably, inducible nitric oxide synthase (iNOS) is robustly
activated in ARC macrophages of HFD-fed obese mice. Hypothalamic macrophage iNOS
inhibition completely abrogates macrophage accumulation and activation,
proinflammatory cytokine overproduction, reactive astrogliosis,
blood-brain-barrier permeability, and lipid accumulation in the ARC of obese
mice. Moreover, central iNOS inhibition improves obesity-induced alterations in
systemic glucose metabolism without affecting adiposity. Our findings suggest a
critical role for hypothalamic macrophage-expressed iNOS in hypothalamic
inflammation and abnormal glucose metabolism in cases of overnutrition-induced
obesity. Lee et al. demonstrate in mice that, upon prolonged high-fat diet
feeding, hypothalamic macrophages proliferate, expand their pool, and sustain
hypothalamic inflammation. Moreover, they show that hypothalamic macrophage iNOS
inhibition diminishes macrophage activation, astrogliosis, blood-brain-barrier
permeability, and impaired glucose metabolism in diet-induced obese mice.
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Affiliation(s)
- Chan Hee Lee
- Biomedical Science and Engineering Interdisciplinary Program, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea; Asan Institute for Life Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Hyo Jin Kim
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea; Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Yong-Soo Lee
- Department of Convergence Medicine, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Gil Myoung Kang
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Hyo Sun Lim
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea; Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Seung-Hwan Lee
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Do Kyeong Song
- Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Obin Kwon
- Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Injae Hwang
- National Creative Research Initiatives Center for Adipose Tissue Remodeling, School of Biological Sciences, Institute of Molecular Biology and Genetics, Seoul National University, Seoul 08826, Korea
| | - Myeongjoo Son
- Department of Anatomy and Cell Biology, Gachon University College of Medicine, Incheon 21565, Korea
| | - Kyunghee Byun
- Department of Anatomy and Cell Biology, Gachon University College of Medicine, Incheon 21565, Korea
| | - Young Hoon Sung
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea; Department of Convergence Medicine, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Seyun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
| | - Jae Bum Kim
- National Creative Research Initiatives Center for Adipose Tissue Remodeling, School of Biological Sciences, Institute of Molecular Biology and Genetics, Seoul National University, Seoul 08826, Korea
| | - Eun Young Choi
- Department of Biomedical Sciences, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
| | - Keetae Kim
- Department of New Biology, DGIST, Daegu 42988, Korea
| | - Mi-Na Kweon
- Department of Convergence Medicine, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Jong-Woo Sohn
- Biomedical Science and Engineering Interdisciplinary Program, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea; Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
| | - Min-Seon Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul 05505, Korea.
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Abstract
Under conditions leading to aging and metabolic syndrome, the hypothalamus atypically undergoes proinflammatory signaling activation leading to a chronic and stable background inflammation, referred to as "hypothalamic microinflammation." Through the past decade of research, progress has been made to causally link this hypothalamic inflammation to the mechanism of aging as well as metabolic syndrome, promoting the "hypothalamic microinflammation" theory, which helps characterize the consensus of these epidemic health problems. In general, it is consistently appreciated that hypothalamic microinflammation emerges during the early stages of aging and metabolic syndrome and evolves to be multifaceted and advanced alongside disease progression, while inhibition of key inflammatory components in the hypothalamus has a broad range of effects in counteracting these disorders. Herein, focusing on aging and metabolic syndrome, this writing aims to provide an overview of and insights into the mediators, signaling components, cellular impacts, and physiological significance of this hypothalamic microinflammation.
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Zhu J, Ji L, Liu C. Heart rate variability monitoring for emotion and disorders of emotion. Physiol Meas 2019; 40:064004. [PMID: 30974428 DOI: 10.1088/1361-6579/ab1887] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND Emotion is composed of cognitive processing, physiological response and behavioral reaction. Heart rate variability (HRV) refers to the fluctuations between consecutive heartbeat cycles, and is considered as a non-invasive method for evaluating cardiac autonomic function. HRV analysis plays an important role in emotional study and detection. OBJECTIVE In this paper, the physiological foundation of HRV is briefly described, and then the relevant literature relating to HRV-based emotion studies for the performance of HRV in different emotions, emotion recognition, the evaluation of emotional disorders, HRV biofeedback, as well as HRV-based emotion analysis and management enhanced by wearable devices, are reviewed. SIGNIFICANCE It is suggested that HRV is an effective tool for the measurement and regulation of emotional response, with a broad application prospect.
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Affiliation(s)
- Jianping Zhu
- School of Life Science, Shandong Normal University, Jinan 250014, People's Republic of China
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47
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Azevedo EP, Guimaraes-Costa AB, Bandeira-Melo C, Chimelli L, Waddington-Cruz M, Saraiva EM, Palhano FL, Foguel D. Inflammatory profiling of patients with familial amyloid polyneuropathy. BMC Neurol 2019; 19:146. [PMID: 31253122 PMCID: PMC6599258 DOI: 10.1186/s12883-019-1369-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 06/18/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Familial amyloid polyneuropathy (FAP) or ATTRv (amyloid TTR variant) amyloidosis is a fatal hereditary disease characterized by the deposition of amyloid fibrils composed of transthyretin (TTR). The current diagnosis of ATTRv relies on genetic identification of TTR mutations and on Congo Red-positive amyloid deposits, which are absent in most ATTRv patients that are asymptomatic or early symptomatic, supporting the need for novel biomarkers to identify patients in earlier disease phases allowing disease control. METHODS In an effort to search for new markers for ATTRv, our group searched for nine inflammation markers in ATTRv serum from a cohort of 28 Brazilian ATTRv patients. RESULTS We found that the levels of six markers were increased (TNF-α, IL-1β, IL-8, IL-33, IFN-β and IL-10), one had decreased levels (IL-12) and two of them were unchanged (IL-6 and cortisol). Interestingly, asymptomatic patients already presented high levels of IL-33, IL-1β and IL-10, suggesting that inflammation may take place before fibril deposition. CONCLUSIONS Our findings shed light on a new, previously unidentified aspect of ATTRv, which might help define new criteria for disease management, as well as provide additional understanding of ATTRv aggressiveness.
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Affiliation(s)
- Estefania P Azevedo
- Instituto de Bioquímica Medica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Anderson B Guimaraes-Costa
- Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Christianne Bandeira-Melo
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Leila Chimelli
- Serviço de Anatomia Patológica do Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcia Waddington-Cruz
- Serviço de Neurologia do Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Elvira M Saraiva
- Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernando L Palhano
- Instituto de Bioquímica Medica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Debora Foguel
- Instituto de Bioquímica Medica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
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48
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Clarke JR, Ribeiro FC, Frozza RL, De Felice FG, Lourenco MV. Metabolic Dysfunction in Alzheimer's Disease: From Basic Neurobiology to Clinical Approaches. J Alzheimers Dis 2019; 64:S405-S426. [PMID: 29562518 DOI: 10.3233/jad-179911] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Clinical trials have extensively failed to find effective treatments for Alzheimer's disease (AD) so far. Even after decades of AD research, there are still limited options for treating dementia. Mounting evidence has indicated that AD patients develop central and peripheral metabolic dysfunction, and the underpinnings of such events have recently begun to emerge. Basic and preclinical studies have unveiled key pathophysiological mechanisms that include aberrant brain stress signaling, inflammation, and impaired insulin sensitivity. These findings are in accordance with clinical and neuropathological data suggesting that AD patients undergo central and peripheral metabolic deregulation. Here, we review recent basic and clinical findings indicating that metabolic defects are central to AD pathophysiology. We further propose a view for future therapeutics that incorporates metabolic defects as a core feature of AD pathogenesis. This approach could improve disease understanding and therapy development through drug repurposing and/or identification of novel metabolic targets.
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Affiliation(s)
- Julia R Clarke
- School of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Felipe C Ribeiro
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rudimar L Frozza
- Oswaldo Cruz Institute, Oswaldo Cruz Foundation, FIOCRUZ, Rio de Janeiro, Brazil
| | - Fernanda G De Felice
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Centre for Neuroscience Studies, Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Mychael V Lourenco
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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49
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The role of hormonal, metabolic and inflammatory biomarkers on sleep and appetite in drug free patients with major depression: A systematic review. J Affect Disord 2019; 250:249-259. [PMID: 30870775 DOI: 10.1016/j.jad.2019.03.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/30/2019] [Accepted: 03/03/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND Major depressive disorder (MDD) is a complex and heterogeneous disorder in which clinical symptoms can widely differ among patients. Neurovegetative symptoms, i.e. decreased or increased appetite, changes in body weight and sleep disturbances, described as 'melancholic' or 'atypical' features of a depressive episode, are the most variable symptoms among patients with MDD. We hypothesized biomarkers differences underlying this neurovegetative variability in major depression. METHODS We systematically reviewed, according to the PRISMA guidelines, the role of specific metabolic, hormonal and inflammatory biomarkers in drug-free MDD patients, that could have neurobiological effects on appetite, weight regulation and circadian rhythms, influencing eating behaviour and sleep patterns. All studies regarding the co-occurrence of disturbed sleep and appetite were examined. RESULTS Besides the well-known leptin and ghrelin, other biomarkers such as BDNF, VEGF, NPY, orexin, and the recent discovered nesfatin-1 seem to be involved in neurovegetative changes in depressive disorders playing a role in the regulation of affective states, stress reactions and sleep patterns. Interestingly, based on the existing evidence, ghrelin, orexin and nesfatin-1 could be linked both to sleep and appetite regulation in depressed patients. LIMITATIONS Heterogeneous studies with low sample size. CONCLUSIONS Despite the wide heterogeneity of results, studies on biomarkers of appetite and sleep in MDD are an interesting field of research to explain the neurobiological substrates of depressive symptoms that deserve further investigation.
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50
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Solon-Biet SM, Cogger VC, Pulpitel T, Wahl D, Clark X, Bagley E, Gregoriou GC, Senior AM, Wang QP, Brandon AE, Perks R, O’Sullivan J, Koay YC, Bell-Anderson K, Kebede M, Yau B, Atkinson C, Svineng G, Dodgson T, Wali JA, Piper MDW, Juricic P, Partridge L, Rose AJ, Raubenheimer D, Cooney GJ, Le Couteur DG, Simpson SJ. Branched chain amino acids impact health and lifespan indirectly via amino acid balance and appetite control. Nat Metab 2019; 1:532-545. [PMID: 31656947 PMCID: PMC6814438 DOI: 10.1038/s42255-019-0059-2] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/22/2019] [Indexed: 12/11/2022]
Abstract
Elevated branched chain amino acids (BCAAs) are associated with obesity and insulin resistance. How long-term dietary BCAAs impact late-life health and lifespan is unknown. Here, we show that when dietary BCAAs are varied against a fixed, isocaloric macronutrient background, long-term exposure to high BCAA diets leads to hyperphagia, obesity and reduced lifespan. These effects are not due to elevated BCAA per se or hepatic mTOR activation, but rather due to a shift in the relative quantity of dietary BCAAs and other AAs, notably tryptophan and threonine. Increasing the ratio of BCAAs to these AAs resulted in hyperphagia and is associated with central serotonin depletion. Preventing hyperphagia by calorie restriction or pair-feeding averts the health costs of a high BCAA diet. Our data highlight a role for amino acid quality in energy balance and show that health costs of chronic high BCAA intakes need not be due to intrinsic toxicity but, rather, a consequence of hyperphagia driven by AA imbalance.
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Affiliation(s)
- Samantha M Solon-Biet
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Victoria C Cogger
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Sydney Medical School, Faculty of Health and Medicine, The University of Sydney NSW, Australia
- Ageing and Alzheimers Institute and Centre for Education and Research on Ageing, Concord Hospital, Concord NSW, Australia
- ANZAC Research Institute, The University of Sydney NSW, Australia
| | - Tamara Pulpitel
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Sydney Medical School, Faculty of Health and Medicine, The University of Sydney NSW, Australia
| | - Devin Wahl
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Sydney Medical School, Faculty of Health and Medicine, The University of Sydney NSW, Australia
- Ageing and Alzheimers Institute and Centre for Education and Research on Ageing, Concord Hospital, Concord NSW, Australia
| | - Ximonie Clark
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Elena Bagley
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Medical Sciences, Faculty of Health and Medicine, The University of Sydney NSW, Australia
| | - Gabrielle C Gregoriou
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Medical Sciences, Faculty of Health and Medicine, The University of Sydney NSW, Australia
| | - Alistair M Senior
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Qiao-Ping Wang
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, Guangzhou 510275, China
| | - Amanda E Brandon
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Sydney Medical School, Faculty of Health and Medicine, The University of Sydney NSW, Australia
| | - Ruth Perks
- Charles Perkins Centre, The University of Sydney NSW, Australia
| | - John O’Sullivan
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Heart Research Institute, The University of Sydney, NSW, Australia
| | - Yen Chin Koay
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Heart Research Institute, The University of Sydney, NSW, Australia
| | - Kim Bell-Anderson
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Melkam Kebede
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Belinda Yau
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Clare Atkinson
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | | | - Timothy Dodgson
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Jibran A Wali
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | | | - Paula Juricic
- Max Planck Institute for Biology of Aging, Cologne, Germany
| | | | - Adam J Rose
- Monash Biomedicine Discovery Institute, Monash University VIC, Australia
| | - David Raubenheimer
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
| | - Gregory J Cooney
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Sydney Medical School, Faculty of Health and Medicine, The University of Sydney NSW, Australia
| | - David G Le Couteur
- Charles Perkins Centre, The University of Sydney NSW, Australia
- Sydney Medical School, Faculty of Health and Medicine, The University of Sydney NSW, Australia
- Ageing and Alzheimers Institute and Centre for Education and Research on Ageing, Concord Hospital, Concord NSW, Australia
- ANZAC Research Institute, The University of Sydney NSW, Australia
| | - Stephen J Simpson
- Charles Perkins Centre, The University of Sydney NSW, Australia
- School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, NSW, Australia
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