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Wang HY, Capuano AW, Khan A, Pei Z, Lee KC, Bennett DA, Ahima RS, Arnold SE, Arvanitakis Z. Insulin and adipokine signaling and their cross-regulation in postmortem human brain. Neurobiol Aging 2019; 84:119-130. [PMID: 31539648 DOI: 10.1016/j.neurobiolaging.2019.08.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/09/2019] [Accepted: 08/13/2019] [Indexed: 12/14/2022]
Abstract
Aberrant insulin and adipokine signaling has been implicated in cognitive decline associated with both type 2 diabetes mellitus and neurodegenerative diseases. We established methods that reliably measure insulin, adiponectin and leptin signaling, and their crosstalk, in thawed postmortem mid-frontal cortical tissue from cognitively normal older subjects with a short postmortem interval. Insulin-evoked insulin receptor (IR) activation increases activated, tyrosine-phosphorylated IRβ on tyrosine residues 960, 1150, and 1151, insulin receptor substrate-1 recruitment to IRβ and phosphorylated RAC-α-serine/threonine-protein kinase. Adiponectin augments, but leptin inhibits, insulin signaling. Adiponectin activates adiponectin receptors to induce APPL1 binding to adiponectin receptor 1 and 2 and T-cadherin and downstream adenosine monophosphate-dependent protein kinase phosphorylation. Insulin inhibited adiponectin-induced signaling. In addition, leptin-induced leptin receptor (OB-R) signaling promotes Janus kinase 2 recruitment to OB-R and Janus kinase 2 and downstream signal transducer and activator of transcription 3 phosphorylation. Insulin enhanced leptin signaling. These data demonstrate insulin and adipokine signaling interactions in human brain. Future studies can use these methods to examine insulin, adiponectin, and leptin metabolic dysregulation in aging and disease states, such as type 2 diabetes and Alzheimer's disease-related dementias.
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Affiliation(s)
- Hoau-Yan Wang
- Department of Molecular, Cellular and Biomedical Sciences, City University of New York School of Medicine, New York, NY, USA; Department of Biology, Neuroscience Program, Graduate School of The City University of New York, New York, NY, USA.
| | - Ana W Capuano
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Amber Khan
- Department of Molecular, Cellular and Biomedical Sciences, City University of New York School of Medicine, New York, NY, USA; Department of Biology, Neuroscience Program, Graduate School of The City University of New York, New York, NY, USA
| | - Zhe Pei
- Department of Molecular, Cellular and Biomedical Sciences, City University of New York School of Medicine, New York, NY, USA
| | - Kuo-Chieh Lee
- Department of Molecular, Cellular and Biomedical Sciences, City University of New York School of Medicine, New York, NY, USA
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Rexford S Ahima
- Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Steven E Arnold
- Department of Neurology and the Massachusetts Alzheimer's Disease Research Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Zoe Arvanitakis
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
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Ould Hamouda H, Delplanque B, Benomar Y, Crépin D, Riffault L, LeRuyet P, Bonhomme C, Taouis M. Milk-soluble formula increases food intake and reduces Il6 expression in elderly rat hypothalami. J Endocrinol 2015; 226:67-80. [PMID: 25994005 DOI: 10.1530/joe-15-0076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/20/2015] [Indexed: 01/17/2023]
Abstract
Malnutrition in the elderly is accompanied by several metabolic dysfunctions, especially alterations in energy homeostasis regulation and a loss of insulin responsiveness. Nutritional recommendations aim to enrich food with high protein and energy supplements, and protein composition and lipid quality have been widely studied. Despite the numerous studies that have examined attempts to overcome malnutrition in the elderly through such nutritional supplementation, it is still necessary to study the effects of a combination of protein, lipids, and vitamin D (VitD). This can be done in animal models of elderly malnutrition. In the present study, we investigated the effects of several diet formulae on insulin responsiveness, inflammation, and the hypothalamic expression of key genes that are involved in energy homeostasis control. To mimic elderly malnutrition in humans, elderly Wistar rats were food restricted (R, -50%) for 12 weeks and then refed for 4 weeks with one of four different isocaloric diets: a control diet; a diet where milk soluble protein (MSP) replaced casein; a blend of milk fat, rapeseed, and DHA (MRD); or a full formula (FF) diet that combined MSP and a blend of MRD (FF). All of the refeeding diets contained VitD. We concluded that: (i) food restriction led to the upregulation of insulin receptor in liver and adipose tissue accompanied by increased Tnfα in the hypothalamus; (ii) in all of the refed groups, refeeding led to similar body weight gain during the refeeding period; and (iii) refeeding with MSP and MRD diets induced higher food intake on the fourth week of refeeding, and this increase was associated with reduced hypothalamic interleukin 6 expression.
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Affiliation(s)
- Hassina Ould Hamouda
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
| | - Bernadette Delplanque
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
| | - Yacir Benomar
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
| | - Delphine Crépin
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
| | - Laure Riffault
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
| | - Pascale LeRuyet
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
| | - Cécile Bonhomme
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
| | - Mohammed Taouis
- Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France Neuroendocrinologie Moléculaire de la Prise AlimentaireUniversity of Paris-Sud, UMR 8195, F-91405 Orsay, FranceNeuroendocrinologie Moléculaire de la Prise AlimentaireCNRS, Centre de Neurosciences Paris-Sud, UMR 8195, F-91405 Orsay, FranceService NutritionLactalis Recherche et Développement, 8 Fromy, CS 60082, 35240 Retiers, FranceLactalis Nutrition Parc d'Activité de Torcé-secteur Est35370 Torcé, France
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Nazarians-Armavil A, Menchella JA, Belsham DD. Cellular insulin resistance disrupts leptin-mediated control of neuronal signaling and transcription. Mol Endocrinol 2013; 27:990-1003. [PMID: 23579487 DOI: 10.1210/me.2012-1338] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Central resistance to the actions of insulin and leptin is associated with the onset of obesity and type 2 diabetes mellitus, whereas leptin and insulin signaling is essential for both glucose and energy homeostasis. Although it is known that leptin resistance can lead to attenuated insulin signaling, whether insulin resistance can lead to or exacerbate leptin resistance is unknown. To investigate the molecular events underlying crosstalk between these signaling pathways, immortalized hypothalamic neuronal models, rHypoE-19 and mHypoA-2/10, were used. Prolonged insulin exposure was used to induce cellular insulin resistance, and thereafter leptin-mediated regulation of signal transduction and gene expression was assessed. Leptin directly repressed agouti-related peptide mRNA levels but induced urocortin-2, insulin receptor substrate (IRS)-1, IRS2, and IR transcription, through leptin-mediated phosphatidylinositol 3-kinase/Akt activation. Neuronal insulin resistance, as assessed by attenuated Akt phosphorylation, blocked leptin-mediated signal transduction and agouti-related peptide, urocortin-2, IRS1, IRS2, and insulin receptor synthesis. Insulin resistance caused a substantial decrease in insulin receptor protein levels, forkhead box protein 1 phosphorylation, and an increase in suppressor of cytokine signaling 3 protein levels. Cellular insulin resistance may cause or exacerbate neuronal leptin resistance and, by extension, obesity. It is essential to unravel the effects of neuronal insulin resistance given that both peripheral, as well as the less widely studied central insulin resistance, may contribute to the development of metabolic, reproductive, and cardiovascular disorders. This study provides improved understanding of the complex cellular crosstalk between insulin-leptin signal transduction that is disrupted during neuronal insulin resistance.
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Affiliation(s)
- Anaies Nazarians-Armavil
- Department of Physiology, University of Toronto, Medical Sciences Building 3247A, 1 Kings College Circle, Toronto, Ontario, Canada M5S 1A8
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