101
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Jones NS, Rebeck GW. The Synergistic Effects of APOE Genotype and Obesity on Alzheimer's Disease Risk. Int J Mol Sci 2018; 20:ijms20010063. [PMID: 30586872 PMCID: PMC6337558 DOI: 10.3390/ijms20010063] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 12/17/2022] Open
Abstract
The APOE gene has three common alleles—E2, E3, and E4, with APOE4 being the strongest genetic risk factor for developing Alzheimer’s Disease (AD). Obesity is a global epidemic and contributes to multiple metabolic problems. Obesity is also a risk factor for cognitive decline. Here, we review the effects of APOE4 and obesity on cognition and AD development, independently and together. We describe studies that have associated APOE4 with cognitive deficits and AD, as well as studies that have associated obesity to cognitive deficits and AD. We then describe studies that have examined the effects of obesity and APOE genotypes together, with a focus on APOE4 and high fat diets. Both human studies and rodent models have contributed to understanding the effects of obesity on the different APOE genotypes, and we outline possible underlying mechanisms associated with these effects. Data across approaches support a model in which APOE4 and obesity combine for greater detrimental effects on metabolism and cognition, in ways that are influenced by both age and sex.
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Affiliation(s)
- Nahdia S Jones
- Department of Neuroscience, Georgetown University, 3970 Reservoir Rd NW, Washington, DC 20007, USA.
| | - G William Rebeck
- Department of Neuroscience, Georgetown University, 3970 Reservoir Rd NW, Washington, DC 20007, USA.
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102
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Mukherjee A, Mehta BK, Sen KK, Banerjee S. Metabolic syndrome-associated cognitive decline in mice: Role of minocycline. Indian J Pharmacol 2018; 50:61-68. [PMID: 30100653 PMCID: PMC6044134 DOI: 10.4103/ijp.ijp_110_18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE: The objective of the study was to characterize the mechanism associated with metabolic syndrome (MetS)-associated cognitive decline and determine the effect of minocycline on the above condition in mice. MATERIALS AND METHODS: We developed a HFHC diet-induced MetS model in mice. Diagnostic characteristics of MetS including waist circumference, lipid levels, blood pressure, and fasting blood glucose were measured in these Swiss albino mice. Cognitive parameters were measured using passive avoidance and elevated plus maze test. Hippocampal acetylcholine esterase (AchE), reduced glutathione (GSH), and cytokine levels were measured and histopathological evaluation conducted. The MetS animals were administered minocycline (50 mg/kg; 10 days) and the above parameters were measured. RESULTS: We successfully induced MetS using HFHC diet in mice. Animals showed significantly higher fasting blood glucose levels (P < 0.001), systolic blood pressure (P < 0.01), waist circumference (P < 0.001), low-density lipoprotein (P < 0.001), and triglyceride (P < 0.01) and reduced high density lipoprotein levels (P < 0.05) compared to control animals. Both scopolamine and MetS significantly lowered (P < 0.01) step-down latency and increased transfer latency (P < 0.001). MetS animals showed significantly higher AchE (P < 0.001) and tumor necrosis factor-α (P < 0.001) and Interleukin-1 β (P < 0.01) and lower GSH (P < 0.001) levels and reduced both CA1 (P < 0.001) and CA3 (P < 0.01) neuronal density compared to controls. Minocycline treatment partially reversed the above neurobehavioral and biochemical changes and improved hippocampal neuronal density in MetS animals. CONCLUSION: MetS led to hippocampal oxidative stress and neuroinflammatory changes with a corresponding loss of hippocampal neuronal density and cognitive decline. Anti-inflammatory and antioxidant property of minocycline may be responsible for its neuroprotective actions in these animals.
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Affiliation(s)
- Aniruddha Mukherjee
- Department of Pharmacology, Gupta College of Technological Sciences, Asansol, West Bengal, India
| | - Bina K Mehta
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi, India
| | - Kalyan K Sen
- Department of Pharmacology, Gupta College of Technological Sciences, Asansol, West Bengal, India
| | - Sugato Banerjee
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi, India
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103
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Chronic Unpredictable Mild Stress Aggravates Mood Disorder, Cognitive Impairment, and Brain Insulin Resistance in Diabetic Rat. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:2901863. [PMID: 30622594 PMCID: PMC6304489 DOI: 10.1155/2018/2901863] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/29/2018] [Accepted: 11/21/2018] [Indexed: 12/15/2022]
Abstract
Diabetes-induced brain insulin resistance is associated with many mental diseases, including depression. Epidemiological evidences demonstrate the pathophysiologic link between stress, depression, and diabetes. This study was designed to determine whether chronic unpredictable mild stress- (CUMS-) induced changes in brain insulin resistance could contribute to deterioration in mood and cognitive functions in diabetic rats. Male SD rats were randomly assigned to three groups, including standard control group, the diabetes group, and the diabetes with CUMS group. After 7 weeks, emotional behaviors and memory performances as well as metabolic phenotypes were measured. In addition, we examined the changes in protein expression related to brain insulin signaling. Our results show that rats in diabetes with CUMS group displayed a decreased locomotor behavior in open-field test, an increased immobility time in forced swim test, and tail suspension test, and an impaired learning and memory in the Morris water maze when compared to animals in diabetes group. Further, diabetes with CUMS exhibited a significant decrease in phosphorylation of insulin receptor and an increase phosphorylation of IRS-1 in brain. These results suggest that the depression-like behaviors and cognitive function impairments in diabetic rats with CUMS were related to the changes of brain insulin signaling.
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104
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Del Olmo N, Ruiz-Gayo M. Influence of High-Fat Diets Consumed During the Juvenile Period on Hippocampal Morphology and Function. Front Cell Neurosci 2018; 12:439. [PMID: 30515083 PMCID: PMC6255817 DOI: 10.3389/fncel.2018.00439] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 11/05/2018] [Indexed: 12/18/2022] Open
Abstract
The negative impact of obesity on neurocognitive functioning is an issue of increasing clinical interest. Over the last decade, a number of studies have analyzed the influence of high-fat diets (HFDs) on cognitive performance, particularly in adolescent individuals. Different approaches, including behavioral, neurochemical, electrophysiological and morphological studies, have been developed to address the effect of HFDs on neural processes interfering with learning and memory skills in rodents. Many of the studies have focused on learning and memory related to the hippocampus and the mechanisms underlying these processes. The goal of the current review article is to highlight the relationship between hippocampal learning/memory deficits and nutritional/endocrine inputs derived from HFDs consumption, with a special emphasis on research showing the effect of HFDs intake during the juvenile period. We have also reviewed recent research regarding the effect of HFDs on hippocampal neurotransmission. An overview of research suggesting the involvement of fatty acid (FA) receptor-mediated signaling pathways in memory deficits triggered by HFDs is also provided. Finally, the role of leptin and HFD-evoked hyperleptinemia is discussed.
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Affiliation(s)
- Nuria Del Olmo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain
| | - Mariano Ruiz-Gayo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain
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105
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Maekawa T, Ohta T, Kume S. Pathophysiological abnormalities in the brains of Spontaneously Diabetic Torii-Lepr fa (SDT fatty) rats, a novel type 2 diabetic model. J Vet Med Sci 2018; 80:1385-1391. [PMID: 30012919 PMCID: PMC6160888 DOI: 10.1292/jvms.18-0296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
In recent years, a relationship between diabetes and neurodegenerative diseases, such as Parkinson's disease, Alzheimer disease or depression, has been proposed. In this study, pathophysiological changes in the brain, especially in the hippocampus, of male SDT fatty rats with obesity and hyperglycemia were investigated. Brains of SD rats and SDT fatty rats were collected at 32 and 58 weeks of age, and parietal cortical thickness and number of pyramidal cells in the hippocampal cornu ammonis 1 and 3 (CA1 and CA3) regions were measured. At 58 weeks of age, the parietal cortical thickness and number of pyramidal cells in the hippocampal CA1 and CA3 regions were lower in SDT fatty rats than in age-matched SD rats. Measurements of mRNA in rat brains at 58 weeks of age showed that the expression of genes related to inflammatory responses (S100a9, TNFα, NF-κB) was elevated in SDT fatty rats. From the aforementioned results, changes suggestive of brain atrophy and impairment in cognitive function were observed in male SDT fatty rat brains.
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Affiliation(s)
- Tatsuya Maekawa
- Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan.,Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takeshi Ohta
- Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Shinichi Kume
- Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
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106
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Okuyama S, Nakashima T, Nakamura K, Shinoka W, Kotani M, Sawamoto A, Nakajima M, Furukawa Y. Inhibitory Effects of Auraptene and Naringin on Astroglial Activation, Tau Hyperphosphorylation, and Suppression of Neurogenesis in the Hippocampus of Streptozotocin-Induced Hyperglycemic Mice. Antioxidants (Basel) 2018; 7:antiox7080109. [PMID: 30126250 PMCID: PMC6115810 DOI: 10.3390/antiox7080109] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/10/2018] [Accepted: 08/17/2018] [Indexed: 01/08/2023] Open
Abstract
Auraptene, a citrus-related compound, exerts anti-inflammatory effects in peripheral tissues, and we demonstrated these effects in the brains of a lipopolysaccharide-injected systemic inflammation animal model and a brain ischemic mouse model. Naringin, another citrus-related compound, has been shown to exert antioxidant effects in several animal models. Hyperglycemia induces oxidative stress and inflammation and causes extensive damage in the brain; therefore, we herein evaluated the anti-inflammatory and other effects of auraptene and naringin in streptozotocin-induced hyperglycemic mice. Both compounds inhibited astroglial activation and the hyperphosphorylation of tau at 231 of threonine in neurons, and also recovered the suppression of neurogenesis in the dentate gyrus of the hippocampus in hyperglycemic mice. These results suggested that auraptene and naringin have potential effects as neuroprotective agents in the brain.
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Affiliation(s)
- Satoshi Okuyama
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Tatsumi Nakashima
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Kumi Nakamura
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Wakana Shinoka
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Maho Kotani
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Atsushi Sawamoto
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Mitsunari Nakajima
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Yoshiko Furukawa
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
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107
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Okuyama S, Shinoka W, Nakamura K, Kotani M, Sawamoto A, Sugawara K, Sudo M, Nakajima M, Furukawa Y. Suppressive effects of the peel of Citrus kawachiensis (Kawachi Bankan) on astroglial activation, tau phosphorylation, and inhibition of neurogenesis in the hippocampus of type 2 diabetic db/db mice. Biosci Biotechnol Biochem 2018; 82:1384-1395. [DOI: 10.1080/09168451.2018.1469396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ABSTRACT
We previously reported that the dried peel powder of Citrus kawachiensis exerted anti-inflammatory effects in the brain in several animal models. Hyperglycemia induces inflammation and oxidative stress and causes massive damage in the brain; therefore, we herein examined the anti-inflammatory and other effects of the dried peel powder of C. kawachiensis in the streptozotocin-induced hyperglycemia mice model and in the type 2 diabetic db/db mice model. The C. kawachiensis administration inhibited microglial activation in the hippocampus in the streptozotocin-injected mice. Moreover, The C. kawachiensis treatment inhibited astroglial activation in the hippocampus and the hyperphosphorylation of tau at 231 of threonine and 396 of serine in hippocampal neurons, and also relieved the suppression of neurogenesis in the dentate gyrus of the hippocampus in the db/db mice. It was suggested that the dried peel powder of C. kawachiensis exerts anti-inflammatory and neuroprotective effects in the brain.
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Affiliation(s)
- Satoshi Okuyama
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Wakana Shinoka
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Kumi Nakamura
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Maho Kotani
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Atsushi Sawamoto
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Kuniaki Sugawara
- Department of Planning and Development, Ehime Beverage Inc. , Matsuyama, Japan
| | - Masahiko Sudo
- Department of Planning and Development, Ehime Beverage Inc. , Matsuyama, Japan
| | - Mitsunari Nakajima
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Yoshiko Furukawa
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
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108
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Small litter size impairs spatial memory and increases anxiety- like behavior in a strain-dependent manner in male mice. Sci Rep 2018; 8:11281. [PMID: 30050150 PMCID: PMC6062575 DOI: 10.1038/s41598-018-29595-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 07/16/2018] [Indexed: 01/14/2023] Open
Abstract
Early life overfeeding is associated with cognitive decline and anxiety-like behaviors in later life. It is not clear whether there are individual differences in the effects of early life overfeeding and what the underlying mechanistic pathways are. We investigated the long-lasting effects of small litter size, an experimental manipulation to induce neonatal overfeeding, in two strains of mice, C57BL/6 and NMRI. We measured body weight, learning and memory, anxiety-related behaviors, interleukin-(IL)-1β and brain-derived-neurotrophic-factor (BDNF) levels in the hippocampus, and both basal and stress corticosterone levels in adult mice which have been nursed in small litters compared with those from control litters. Our findings showed that small litter size led to increased body weight in both strains of mice. Small litter size significantly decreased spatial memory and hippocampal BDNF levels, and increased hippocampal IL-1β, in NMRI mice, but not C57BL/6 mice. Interestingly, we found that small litter size resulted in a significant increase in anxiety-like behaviors and stress-induced corticosterone in NMRI mice, whereas small litter size reduced anxiety-like symptoms and stress-induced corticosterone levels in C57BL/6 mice. These data show that small litter size, which is life-long associated with increased body weight, affects memory and anxiety-related behaviors in a strain-dependent manner in male mice. This suggests that there are individual differences in the developmental consequences of early life overfeeding.
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109
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Vancassel S, Capuron L, Castanon N. Brain Kynurenine and BH4 Pathways: Relevance to the Pathophysiology and Treatment of Inflammation-Driven Depressive Symptoms. Front Neurosci 2018; 12:499. [PMID: 30140200 PMCID: PMC6095005 DOI: 10.3389/fnins.2018.00499] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 07/03/2018] [Indexed: 12/13/2022] Open
Abstract
The prevalence of depressive disorders is growing worldwide, notably due to stagnation in the development of drugs with greater antidepressant efficacy, the continuous large proportion of patients who do not respond to conventional antidepressants, and the increasing rate of chronic medical conditions associated with an increased vulnerability to depressive comorbidities. Accordingly, better knowledge on the pathophysiology of depression and mechanisms underlying depressive comorbidities in chronic medical conditions appears urgently needed, in order to help in the development of targeted therapeutic strategies. In this review, we present evidence pointing to inflammatory processes as key players in the pathophysiology and treatment of depressive symptoms. In particular, we report preclinical and clinical findings showing that inflammation-driven alterations in specific metabolic pathways, namely kynurenine and tetrahydrobiopterin (BH4) pathways, leads to substantial alterations in the metabolism of serotonin, glutamate and dopamine that are likely to contribute to the development of key depressive symptom dimensions. Accordingly, anti-inflammatory interventions targeting kynurenine and BH4 pathways may be effective as novel treatment or as adjuvants of conventional medications rather directed to monoamines, notably when depressive symptomatology and inflammation are comorbid in treated patients. This notion is discussed in the light of recent findings illustrating the tight interactions between known antidepressant drugs and inflammatory processes, as well as their therapeutic implications. Altogether, this review provides valuable findings for moving toward more adapted and personalized therapeutic strategies to treat inflammation-related depressive symptoms.
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Affiliation(s)
- Sylvie Vancassel
- UMR 1286, Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), INRA, Bordeaux, France
- UMR 1286, Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), Bordeaux University, Bordeaux, France
| | - Lucile Capuron
- UMR 1286, Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), INRA, Bordeaux, France
- UMR 1286, Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), Bordeaux University, Bordeaux, France
| | - Nathalie Castanon
- UMR 1286, Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), INRA, Bordeaux, France
- UMR 1286, Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), Bordeaux University, Bordeaux, France
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110
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Yermakov LM, Drouet DE, Griggs RB, Elased KM, Susuki K. Type 2 Diabetes Leads to Axon Initial Segment Shortening in db/db Mice. Front Cell Neurosci 2018; 12:146. [PMID: 29937715 PMCID: PMC6002488 DOI: 10.3389/fncel.2018.00146] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 05/14/2018] [Indexed: 01/09/2023] Open
Abstract
Cognitive and mood impairments are common central nervous system complications of type 2 diabetes, although the neuronal mechanism(s) remains elusive. Previous studies focused mainly on neuronal inputs such as altered synaptic plasticity. Axon initial segment (AIS) is a specialized functional domain within neurons that regulates neuronal outputs. Structural changes of AIS have been implicated as a key pathophysiological event in various psychiatric and neurological disorders. Here we evaluated the structural integrity of the AIS in brains of db/db mice, an established animal model of type 2 diabetes associated with cognitive and mood impairments. We assessed the AIS before (5 weeks of age) and after (10 weeks) the development of type 2 diabetes, and after daily exercise treatment of diabetic condition. We found that the development of type 2 diabetes is associated with significant AIS shortening in both medial prefrontal cortex and hippocampus, as evident by immunostaining of the AIS structural protein βIV spectrin. AIS shortening occurs in the absence of altered neuronal and AIS protein levels. We found no change in nodes of Ranvier, another neuronal functional domain sharing a molecular organization similar to the AIS. This is the first study to identify AIS alteration in type 2 diabetes condition. Since AIS shortening is known to lower neuronal excitability, our results may provide a new avenue for understanding and treating cognitive and mood impairments in type 2 diabetes.
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Affiliation(s)
- Leonid M Yermakov
- Department of Neuroscience, Cell Biology, and Physiology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
| | - Domenica E Drouet
- Department of Neuroscience, Cell Biology, and Physiology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
| | - Ryan B Griggs
- Department of Neuroscience, Cell Biology, and Physiology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
| | - Khalid M Elased
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
| | - Keiichiro Susuki
- Department of Neuroscience, Cell Biology, and Physiology, Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
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111
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Deoxyelephantopin ameliorates lipopolysaccharides (LPS)-induced memory impairments in rats: Evidence for its anti-neuroinflammatory properties. Life Sci 2018; 206:45-60. [PMID: 29792878 DOI: 10.1016/j.lfs.2018.05.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/19/2018] [Accepted: 05/20/2018] [Indexed: 02/07/2023]
Abstract
AIM Neuroinflammation is a critical pathogenic mechanism of most neurodegenerative disorders especially, Alzheimer's disease (AD). Lipopolysaccharides (LPS) are known to induce neuroinflammation which is evident from significant upsurge of pro-inflammatory mediators in in vitro BV-2 microglial cells and in vivo animal models. In present study, we investigated anti-neuroinflammatory properties of deoxyelephantopin (DET) isolated from Elephantopus scaber in LPS-induced neuroinflammatory rat model. MATERIALS AND METHODS In this study, DET (0.625. 1.25 and 2.5 mg/kg, i.p.) was administered in rats for 21 days and those animals were challenged with single injection of LPS (250 μg/kg, i.p.) for 7 days. Cognitive and behavioral assessment was carried out for 7 days followed by molecular assessment on brain hippocampus. Statistical significance was analyzed with one-way analysis of variance followed by Dunnett's test to compare the treatment groups with the control group. KEY FINDINGS DET ameliorated LPS-induced neuroinflammation by suppressing major pro-inflammatory mediators such as iNOS and COX-2. Furthermore, DET enhanced the anti-inflammatory cytokines and concomitantly suppressed the pro-inflammatory cytokines and chemokine production. DET treatment also reversed LPS-induced behavioral and memory deficits and attenuated LPS-induced elevation of the expression of AD markers. DET improved synaptic-functionality via enhancing the activity of pre- and post-synaptic markers, like PSD-95 and SYP. DET also prevented LPS-induced apoptotic neurodegeneration via inhibition of PARP-1, caspase-3 and cleaved caspase-3. SIGNIFICANCE Overall, our studies suggest DET can prevent neuroinflammation-associated memory impairment and neurodegeneration and it could be developed as a therapeutic agent for the treatment of neuroinflammation-mediated and neurodegenerative disorders, such as AD.
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112
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De Sousa RAL. Gestational diabetes is associated to the development of brain insulin resistance in the offspring. Int J Diabetes Dev Ctries 2018. [DOI: 10.1007/s13410-018-0618-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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113
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Hoeijmakers L, Amelianchik A, Verhaag F, Kotah J, Lucassen PJ, Korosi A. Early-Life Stress Does Not Aggravate Spatial Memory or the Process of Hippocampal Neurogenesis in Adult and Middle-Aged APP/PS1 Mice. Front Aging Neurosci 2018; 10:61. [PMID: 29563870 PMCID: PMC5845884 DOI: 10.3389/fnagi.2018.00061] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/20/2018] [Indexed: 01/13/2023] Open
Abstract
Life-time experiences are thought to influence the risk to develop the neurodegenerative disorder Alzheimer’s disease (AD). In particular, early-life stress (ES) may modulate the onset and progression of AD. There is recent evidence by our group and others that AD-related neuropathological progression and the associated neuroimmune responses are modulated by ES in the classic APPswe/PS1dE9 mouse model for AD. We here extend our previous study on ES mediated modulation of neuropathology and neuroinflammation and address in the same cohort of mice whether ES accelerates and/or aggravates AD-induced cognitive decline and alterations in the process of adult hippocampal neurogenesis (AHN), a form of brain plasticity. Chronic ES was induced by limiting bedding and nesting material during the first postnatal week and is known to induce cognitive deficits by 4 months in wild type (WT) mice. The onset of cognitive decline in APP/PS1 mice generally starts around 6 months of age. We here tested mice at ages 2–4 months to study acceleration and at ages 8–10 months for aggravation of the APP/PS1 phenotype. ES-exposed WT and APP/PS1 mice were able to perform the object recognition (ORT) and location tasks (OLT) at 2 months of age. Interestingly, at 3 months, ES induced impairments in the performance of the OLT in WT, but not in APP/PS1 mice. APP/PS1 mice exhibited alterations in hippocampal cell proliferation and differentiation, but ES exposure did not further change this. At 9 months, APP/PS1 mice exhibited impaired performance in the Morris Water Maze (MWM) task, as well as reductions in markers of the AHN process, which were not further modulated by ES exposure. In addition, we observed a so far unreported hyperactivity in ES-exposed mice at 8 months of age, which hampered assessment of cognitive functions in the ORT and OLT. In conclusion, while ES has been reported to modulate AD neuropathology and neuroinflammation before, it failed to accelerate or aggravate the decline in cognition or the process of AHN in APP/PS1 mice at ages 2–4 and 8–10 months. Future studies are needed to unravel how ES might affect the vulnerability to develop AD.
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Affiliation(s)
- Lianne Hoeijmakers
- Brain Plasticity Group, Center for Neuroscience, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Anna Amelianchik
- Brain Plasticity Group, Center for Neuroscience, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Fleur Verhaag
- Brain Plasticity Group, Center for Neuroscience, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Janssen Kotah
- Brain Plasticity Group, Center for Neuroscience, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - Paul J Lucassen
- Brain Plasticity Group, Center for Neuroscience, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - A Korosi
- Brain Plasticity Group, Center for Neuroscience, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
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114
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Zhai Y, Meng X, Ye T, Xie W, Sun G, Sun X. Inhibiting the NLRP3 Inflammasome Activation with MCC950 Ameliorates Diabetic Encephalopathy in db/db Mice. Molecules 2018; 23:molecules23030522. [PMID: 29495433 PMCID: PMC6017493 DOI: 10.3390/molecules23030522] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/03/2018] [Accepted: 02/05/2018] [Indexed: 01/09/2023] Open
Abstract
Diabetes is associated with a high risk of developing cognitive dysfunction and neuropsychiatric disabilities, and these disease symptomsare termed diabetic encephalopathy (DEP). Inflammation is involved in the development of DEP. The cleavage and maturation of the proinflammatory cytokine interleukin (IL)-1β is regulated by the NLRP3 inflammasome. Obese and type 2 diabetic db/db mice show anxiety- and depression-like behaviors and cognitive disorders associated with hippocampal inflammation. The purpose of this study was to explore the role of NLRP3 inflammasome in DEP. Results showed that expression levels of inflammasome components including NLRP3, apoptosis-associated speck-like protein (ASC), and caspase-1, as well as IL-1β in the hippocampus of diabetic db/db mice were higher than those of non-diabetic db/m mice. Treatment of db/db mice with NLRP3 inflammasome inhibitor MCC950 ameliorated anxiety- and depression-like behaviors as well as cognitive dysfunction, and reversed increased NLRP3, ASC, and IL-1βexpression levels and caspase-1 activity in hippocampus. Moreover, MCC950 treatment significantly improved insulin sensitivity in db/db mice. These results demonstrate that inhibition of NLRP3 inflammasome activation may prove to be a potential therapeutic approach for DEP treatment.
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Affiliation(s)
- Yadong Zhai
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing 100193, China.
- Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Beijing 100193, China.
| | - Xiangbao Meng
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing 100193, China.
- Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Beijing 100193, China.
| | - Tianyuan Ye
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing 100193, China.
- Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Beijing 100193, China.
| | - Weijie Xie
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing 100193, China.
- Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Beijing 100193, China.
| | - Guibo Sun
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing 100193, China.
- Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Beijing 100193, China.
| | - Xiaobo Sun
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
- Key Laboratory of Efficacy Evaluation of Chinese Medicine against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing 100193, China.
- Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Beijing 100193, China.
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Zhai Y, Meng X, Luo Y, Wu Y, Ye T, Zhou P, Ding S, Wang M, Lu S, Zhu L, Sun G, Sun X. Notoginsenoside R1 ameliorates diabetic encephalopathy by activating the Nrf2 pathway and inhibiting NLRP3 inflammasome activation. Oncotarget 2018; 9:9344-9363. [PMID: 29507694 PMCID: PMC5823646 DOI: 10.18632/oncotarget.24295] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/04/2017] [Indexed: 12/20/2022] Open
Abstract
Numerous researches supported that oxidative stress and inflammation play important roles in the development of diabetic encephalopathy (DEP). Notoginsenoside R1 (NGR1), one major component of Panax notoginseng, is believed to have anti-oxidative, anti-inflammatory and neuroprotective properties. However, its neuroprotective effects against DEP and underlying mechanisms are still unknown. In this study, db/db mice as well as high-glucose (HG)-treated HT22 hippocampal neurons were used as in vivo and in vitro models to estimate NGR1 neuroprotection. NGR1 administration for 10 weeks could ameliorate cognitive dysfunction, depression-like behaviors, insulin resistance, hyperinsulinemia, dyslipidemia, and inflammation in db/db mice. NGR1 markedly decreased the oxidative stress induced by hyperglycemia in hippocampal neurons. NGR1 significantly activated the protein kinase B (Akt)/nuclear factor-erythroid 2-related factor2 (Nrf2) pathway, and inhibited NLRP3 inflammasome activation in hippocampal neurons, which might be essential for the neuroprotective effects of NGR1. Further supporting these results, we observed that pretreatment with the phosphatidylinositol 3-kinase inhibitor LY294002 abolished NGR1-mediated neuroprotective effects against oxidative stress and NLRP3 inflammasome activation in HG-treated HT22 hippocampal neurons. In conclusion, the present study demonstrates the neuroprotective effects of NGR1 on DEP by activating the Akt/Nrf2 pathway and inhibiting NLRP3 inflammasome activation. This study also provides a novel strategy for the application of NGR1 as a therapeutic agent for patients with DEP.
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Affiliation(s)
- Yadong Zhai
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Xiangbao Meng
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Yun Luo
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Yongmei Wu
- Department of Pharmacology, Changchun University of Traditional Chinese Medicine, Changchun, China
| | - Tianyuan Ye
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Ping Zhou
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Shilan Ding
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Min Wang
- College of Pharmacy, Harbin University of Commerce, Harbin, China
| | - Senbao Lu
- Department of Bioengineering, Santa Clara University, Santa Clara, California, USA
| | - Lili Zhu
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Guibo Sun
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Xiaobo Sun
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.,Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.,Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glycolipid Metabolic Disorders, State Administration of Traditional Chinese Medicine, Beijing, China
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Chaves Filho AJM, Lima CNC, Vasconcelos SMM, de Lucena DF, Maes M, Macedo D. IDO chronic immune activation and tryptophan metabolic pathway: A potential pathophysiological link between depression and obesity. Prog Neuropsychopharmacol Biol Psychiatry 2018; 80:234-249. [PMID: 28595944 DOI: 10.1016/j.pnpbp.2017.04.035] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 04/03/2017] [Accepted: 04/10/2017] [Indexed: 12/12/2022]
Abstract
Obesity and depression are among the most pressing health problems in the contemporary world. Obesity and depression share a bidirectional relationship, whereby each condition increases the risk of the other. By inference, shared pathways may underpin the comorbidity between obesity and depression. Activation of cell-mediated immunity (CMI) is a key factor in the pathophysiology of depression. CMI cytokines, including IFN-γ, TNFα and IL-1β, induce the catabolism of tryptophan (TRY) by stimulating indoleamine 2,3-dioxygenase (IDO) resulting in the synthesis of kynurenine (KYN) and other tryptophan catabolites (TRYCATs). In the CNS, TRYCATs have been related to oxidative damage, inflammation, mitochondrial dysfunction, cytotoxicity, excitotoxicity, neurotoxicity and lowered neuroplasticity. The pathophysiology of obesity is also associated with a state of aberrant inflammation that activates aryl hydrocarbon receptor (AHR), a pathway involved in the detection of intracellular or environmental changes as well as with increases in the production of TRYCATs, being KYN an agonists of AHR. Both AHR and TRYCATS are involved in obesity and related metabolic disorders. These changes in the TRYCAT pathway may contribute to the onset of neuropsychiatric symptoms in obesity. This paper reviews the role of immune activation, IDO stimulation and increased TRYCAT production in the pathophysiology of depression and obesity. Here we suggest that increased synthesis of detrimental TRYCATs is implicated in comorbid obesity and depression and is a new drug target to treat both diseases.
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Affiliation(s)
- Adriano José Maia Chaves Filho
- Neuropsychopharmacology Laboratory, Drug Research and Development Center, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil; Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | - Camila Nayane Carvalho Lima
- Neuropsychopharmacology Laboratory, Drug Research and Development Center, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil; Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | - Silvânia Maria Mendes Vasconcelos
- Neuropsychopharmacology Laboratory, Drug Research and Development Center, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil; Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | - David Freitas de Lucena
- Neuropsychopharmacology Laboratory, Drug Research and Development Center, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil; Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | - Michael Maes
- Impact Strategic Research Center, Deakin University, Geelong, Australia; Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand; Health Sciences Graduate Program, Health Sciences Center, State University of Londrina, Londrina, Brazil
| | - Danielle Macedo
- Neuropsychopharmacology Laboratory, Drug Research and Development Center, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil; Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil.
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Huang R, Han J, Tian S, Cai R, Sun J, Shen Y, Wang S. Association of plasma ghrelin levels and ghrelin rs4684677 polymorphism with mild cognitive impairment in type 2 diabetic patients. Oncotarget 2017; 8:15126-15135. [PMID: 28146431 PMCID: PMC5362472 DOI: 10.18632/oncotarget.14852] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 01/16/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND AIMS People with insulin resistance and type 2 diabetes mellitus (T2DM) are at increased risks of cognitive impairment. We aimed to investigate the association of plasma ghrelin levels and ghrelin rs4684677 polymorphism with mild cognitive impairment (MCI) in T2DM patients. RESULTS In addition to elevated glycosylated hemoglobin (HbA1c), fasting blood glucose (FBG) and homeostasis model assessment of insulin resistance (HOMA-IR), T2DM patients with MCI had decreased plasma ghrelin levels compared with their healthy-cognition subjects (all p < 0.05). Further logistic regression analysis showed that ghrelin level was one of independent factors for MCI in T2DM patients (p < 0.05). Moreover, partial correlation analysis demonstrated that ghrelin levels were positively associated with the scores of Montreal Cognitive Assessment (r = 0.196, p = 0.041) and Auditory Verbal Learning Test-delayed recall (r = 0.197, p = 0.040) after adjustment for HbA1c, FBG and HOMA-IR, wherein the latter represented episodic memory functions. No significant differences were found for the distributions of genotype and allele of ghrelin rs4684677 polymorphism between MCI and control group. MATERIALS AND METHODS A total of 218 T2DM patients, with 112 patients who satisfied the MCI diagnostic criteria and 106 who exhibited healthy cognition, were enrolled in this study. Demographic characteristics, clinical variables and cognitive performances were extensively assessed. Plasma ghrelin levels and ghrelin rs4684677 polymorphism were also determined. CONCLUSIONS Our results suggest that decreased ghrelin levels are associated with MCI, especially with episodic memory dysfunction in T2DM populations.
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Affiliation(s)
- Rong Huang
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009.,Medical School of Southeast University, Nanjing, PR China, 210009
| | - Jing Han
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Sai Tian
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Rongrong Cai
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Jie Sun
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Yanjue Shen
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
| | - Shaohua Wang
- Department of Endocrinology, Affiliated ZhongDa Hospital of Southeast University, Nanjing, PR China, 210009
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Mikolajczak M, Van Bellegem S. Increasing emotional intelligence to decrease healthcare expenditures: How profitable would it be? PERSONALITY AND INDIVIDUAL DIFFERENCES 2017. [DOI: 10.1016/j.paid.2017.05.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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119
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120
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Fourrier C, Remus-Borel J, Greenhalgh AD, Guichardant M, Bernoud-Hubac N, Lagarde M, Joffre C, Layé S. Docosahexaenoic acid-containing choline phospholipid modulates LPS-induced neuroinflammation in vivo and in microglia in vitro. J Neuroinflammation 2017; 14:170. [PMID: 28838312 PMCID: PMC5571638 DOI: 10.1186/s12974-017-0939-x] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/09/2017] [Indexed: 12/27/2022] Open
Abstract
Background Neuroinflammatory processes are considered a double-edged sword, having both protective and detrimental effects in the brain. Microglia, the brain’s resident innate immune cells, are a key component of neuroinflammatory response. There is a growing interest in developing drugs to target microglia and control neuroinflammatory processes. In this regard, docosahexaenoic acid (DHA), the brain’s n-3 polyunsaturated fatty acid, is a promising molecule to regulate pro-inflammatory microglia and cytokine production. Several works reported that the bioavailability of DHA to the brain is higher when DHA is acylated to phospholipid. In this work, we analyzed the anti-inflammatory activity of DHA-phospholipid, either acetylated at the sn-1 position (AceDoPC, a stable form thought to have superior access to the brain) or acylated with palmitic acid at the sn-1 position (PC-DHA) using a lipopolysaccharide (LPS)-induced neuroinflammation model both in vitro and in vivo. Methods In vivo, adult C57Bl6/J mice were injected intravenously (i.v.) with either AceDoPC or PC-DHA 24 h prior to LPS (i.p.). For in vitro studies, immortalized murine microglia cells BV-2 were co-incubated with DHA forms and LPS. AceDoPC and PC-DHA effect on brain or BV-2 PUFA content was assessed by gas chromatography. LPS-induced pro-inflammatory cytokines interleukin IL-1β, IL-6, and tumor necrosis factor (TNF) α production were measured by quantitative PCR (qPCR) or multiplex. IL-6 receptors and associated signaling pathway STAT3 were assessed by FACS analysis and western-blot in vitro. Results In vivo, a single injection of AceDoPC or PC-DHA decreased LPS-induced IL-6 production in the hippocampus of mice. This effect could be linked to their direct effect on microglia, as revealed in vitro. In addition, AceDoPC or PC-DHA reduced IL-6 receptor while only AceDoPC decreased IL-6-induced STAT3 phosphorylation. Conclusions These results highlight the potency of administered DHA—acetylated to phospholipids—to rapidly regulate LPS-induced neuroinflammatory processes through their effect on microglia. In particular, both IL-6 production and signaling are targeted by AceDoPC in microglia.
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Affiliation(s)
- Célia Fourrier
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France.,Bordeaux University, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France
| | - Julie Remus-Borel
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France.,Bordeaux University, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France
| | - Andrew D Greenhalgh
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France.,Bordeaux University, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France
| | - Michel Guichardant
- CarMeN laboratory, INSERM UMR 1060, INRA UMR 1397, IMBL, INSA-Lyon, University of Lyon, Lyon, France
| | - Nathalie Bernoud-Hubac
- CarMeN laboratory, INSERM UMR 1060, INRA UMR 1397, IMBL, INSA-Lyon, University of Lyon, Lyon, France
| | - Michel Lagarde
- CarMeN laboratory, INSERM UMR 1060, INRA UMR 1397, IMBL, INSA-Lyon, University of Lyon, Lyon, France
| | - Corinne Joffre
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France. .,Bordeaux University, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France.
| | - Sophie Layé
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France. .,Bordeaux University, Nutrition et Neurobiologie Intégrée, UMR 1286, 33076, Bordeaux, France.
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de Cossío LF, Fourrier C, Sauvant J, Everard A, Capuron L, Cani PD, Layé S, Castanon N. Impact of prebiotics on metabolic and behavioral alterations in a mouse model of metabolic syndrome. Brain Behav Immun 2017; 64:33-49. [PMID: 28027925 DOI: 10.1016/j.bbi.2016.12.022] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 12/09/2016] [Accepted: 12/22/2016] [Indexed: 02/08/2023] Open
Abstract
Mounting evidence shows that the gut microbiota, an important player within the gut-brain communication axis, can affect metabolism, inflammation, brain function and behavior. Interestingly, gut microbiota composition is known to be altered in patients with metabolic syndrome (MetS), who also often display neuropsychiatric symptoms. The use of prebiotics, which beneficially alters the microbiota, may therefore be a promising way to potentially improve physical and mental health in MetS patients. This hypothesis was tested in a mouse model of MetS, namely the obese and type-2 diabetic db/db mice, which display emotional and cognitive alterations associated with changes in gut microbiota composition and hippocampal inflammation compared to their lean db/+ littermates. We assessed the impact of chronic administration (8weeks) of prebiotics (oligofructose) on both metabolic (body weight, food intake, glucose homeostasis) and behavioral (increased anxiety-like behavior and impaired spatial memory) alterations characterizing db/db mice, as well as related neurobiological correlates, with particular attention to neuroinflammatory processes. Prebiotic administration improved excessive food intake and glycemic dysregulations (glucose tolerance and insulin resistance) in db/db mice. This was accompanied by an increase of plasma anti-inflammatory cytokine IL-10 levels and hypothalamic mRNA expression of the anorexigenic cytokine IL-1β, whereas unbalanced mRNA expression of hypothalamic orexigenic (NPY) and anorexigenic (CART, POMC) peptides was unchanged. We also detected signs of improved blood-brain-barrier integrity in the hypothalamus of oligofructose-treated db/db mice (normalized expression of tight junction proteins ZO-1 and occludin). On the contrary, prebiotic administration did not improve behavioral alterations and associated reduction of hippocampal neurogenesis displayed by db/db mice, despite normalization of increased hippocampal IL-6 mRNA expression. Of note, we found a relationship between the effect of treatment on dentate gyrus neurons and spatial memory. These findings may prove valuable for introducing novel approaches to treat some of the comorbidities associated with MetS.
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Affiliation(s)
- Lourdes Fernández de Cossío
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Célia Fourrier
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Julie Sauvant
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Amandine Everard
- Université catholique de Louvain, Louvain Drug Research Institute, WELBIO (Walloon Excellence in Life Sciences and Biotechnology), Metabolism and Nutrition Research Group, 1200 Brussels, Belgium
| | - Lucile Capuron
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Patrice D Cani
- Université catholique de Louvain, Louvain Drug Research Institute, WELBIO (Walloon Excellence in Life Sciences and Biotechnology), Metabolism and Nutrition Research Group, 1200 Brussels, Belgium
| | - Sophie Layé
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Nathalie Castanon
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France.
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Hippocampal insulin resistance and altered food decision-making as players on obesity risk. Neurosci Biobehav Rev 2017; 77:165-176. [DOI: 10.1016/j.neubiorev.2017.03.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 03/17/2017] [Accepted: 03/19/2017] [Indexed: 12/17/2022]
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Mullins RJ, Diehl TC, Chia CW, Kapogiannis D. Insulin Resistance as a Link between Amyloid-Beta and Tau Pathologies in Alzheimer's Disease. Front Aging Neurosci 2017; 9:118. [PMID: 28515688 PMCID: PMC5413582 DOI: 10.3389/fnagi.2017.00118] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 04/11/2017] [Indexed: 12/19/2022] Open
Abstract
Current hypotheses and theories regarding the pathogenesis of Alzheimer’s disease (AD) heavily implicate brain insulin resistance (IR) as a key factor. Despite the many well-validated metrics for systemic IR, the absence of biomarkers for brain-specific IR represents a translational gap that has hindered its study in living humans. In our lab, we have been working to develop biomarkers that reflect the common mechanisms of brain IR and AD that may be used to follow their engagement by experimental treatments. We present two promising biomarkers for brain IR in AD: insulin cascade mediators probed in extracellular vesicles (EVs) enriched for neuronal origin, and two-dimensional magnetic resonance spectroscopy (MRS) measures of brain glucose. As further evidence for a fundamental link between brain IR and AD, we provide a novel analysis demonstrating the close spatial correlation between brain expression of genes implicated in IR (using Allen Human Brain Atlas data) and tau and beta-amyloid pathologies. We proceed to propose the bold hypotheses that baseline differences in the metabolic reliance on glycolysis, and the expression of glucose transporters (GLUT) and insulin signaling genes determine the vulnerability of different brain regions to Tau and/or Amyloid beta (Aβ) pathology, and that IR is a critical link between these two pathologies that define AD. Lastly, we provide an overview of ongoing clinical trials that target IR as an angle to treat AD, and suggest how biomarkers may be used to evaluate treatment efficacy and target engagement.
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Affiliation(s)
- Roger J Mullins
- Laboratory of Neurosciences, Intramural Research Program, National Institute on Aging, National Institutes of Health (NIA/NIH)Baltimore, MD, USA
| | - Thomas C Diehl
- Laboratory of Neurosciences, Intramural Research Program, National Institute on Aging, National Institutes of Health (NIA/NIH)Baltimore, MD, USA
| | - Chee W Chia
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health (NIA/NIH)Baltimore, MD, USA
| | - Dimitrios Kapogiannis
- Laboratory of Neurosciences, Intramural Research Program, National Institute on Aging, National Institutes of Health (NIA/NIH)Baltimore, MD, USA
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Rebolledo-Solleiro D, Roldán-Roldán G, Díaz D, Velasco M, Larqué C, Rico-Rosillo G, Vega-Robledo GB, Zambrano E, Hiriart M, Pérez de la Mora M. Increased anxiety-like behavior is associated with the metabolic syndrome in non-stressed rats. PLoS One 2017; 12:e0176554. [PMID: 28463967 PMCID: PMC5413000 DOI: 10.1371/journal.pone.0176554] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 04/12/2017] [Indexed: 01/08/2023] Open
Abstract
Metabolic syndrome (MS) is a cluster of signs that increases the risk to develop diabetes mellitus type 2 and cardiovascular disease. In the last years, a growing interest to study the relationship between MS and psychiatric disorders, such as depression and anxiety, has emerged obtaining conflicting results. Diet-induced MS rat models have only examined the effects of high-fat or mixed cafeteria diets to a limited extent. We explored whether an anxiety-like behavior was associated with MS in non-stressed rats chronically submitted to a high-sucrose diet (20% sucrose in drinking water) using three different anxiety paradigms: the shock-probe/burying test (SPBT), the elevated plus-maze (EPM) and the open-field test (OFT). Behaviorally, the high-sucrose diet group showed an increase in burying behavior in the SPBT. Also, these animals displayed both avoidance to explore the central part of the arena and a significant increase in freezing behavior in the OFT and lack of effects in the EPM. Also, high-sucrose diet group showed signs of an MS-like condition: significant increases in body weight and body mass index, abdominal obesity, hypertension, hyperglycemia, hyperinsulinemia, and dyslipidemia. Plasma leptin and resistin levels were also increased. No changes in plasma corticosterone levels were found. These results indicate that rats under a 24-weeks high-sucrose diet develop an MS associated with an anxiety-like behavior. Although the mechanisms underlying this behavioral outcome remain to be investigated, the role of leptin is emphasized.
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Affiliation(s)
- Daniela Rebolledo-Solleiro
- Division of Neuroscience, Instituto de Fisiología Celular, Universidad Nacional, Autónoma de México, Mexico City, Mexico
- * E-mail: (MPM); (DR-S)
| | - Gabriel Roldán-Roldán
- Laboratorio de Neurobiología de la Conducta, Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Daniel Díaz
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Myrian Velasco
- Division of Neuroscience, Instituto de Fisiología Celular, Universidad Nacional, Autónoma de México, Mexico City, Mexico
| | - Carlos Larqué
- Division of Neuroscience, Instituto de Fisiología Celular, Universidad Nacional, Autónoma de México, Mexico City, Mexico
| | - Guadalupe Rico-Rosillo
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Gloria Bertha Vega-Robledo
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Elena Zambrano
- Departamento de Biología de la Reproducción, Instituto Nacional de la Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Marcia Hiriart
- Division of Neuroscience, Instituto de Fisiología Celular, Universidad Nacional, Autónoma de México, Mexico City, Mexico
| | - Miguel Pérez de la Mora
- Division of Neuroscience, Instituto de Fisiología Celular, Universidad Nacional, Autónoma de México, Mexico City, Mexico
- * E-mail: (MPM); (DR-S)
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125
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Diehl T, Mullins R, Kapogiannis D. Insulin resistance in Alzheimer's disease. Transl Res 2017; 183:26-40. [PMID: 28034760 PMCID: PMC5393926 DOI: 10.1016/j.trsl.2016.12.005] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/05/2016] [Accepted: 12/06/2016] [Indexed: 12/14/2022]
Abstract
The links between systemic insulin resistance (IR), brain-specific IR, and Alzheimer's disease (AD) have been an extremely productive area of current research. This review will cover the fundamentals and pathways leading to IR, its connection to AD via cellular mechanisms, the most prominent methods and models used to examine it, an introduction to the role of extracellular vesicles (EVs) as a source of biomarkers for IR and AD, and an overview of modern clinical studies on the subject. To provide additional context, we also present a novel analysis of the spatial correlation of gene expression in the brain with the aid of Allen Human Brain Atlas data. Ultimately, examining the relation between IR and AD can be seen as a means of advancing the understanding of both disease states, with IR being a promising target for therapeutic strategies in AD treatment. In conclusion, we highlight the therapeutic potential of targeting brain IR in AD and the main strategies to pursue this goal.
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Affiliation(s)
- Thomas Diehl
- Laboratory of Neurosciences, Intramural Research Program, National Institute on Aging/National Institutes of Health (NIA/NIH), Baltimore, MD
| | - Roger Mullins
- Laboratory of Neurosciences, Intramural Research Program, National Institute on Aging/National Institutes of Health (NIA/NIH), Baltimore, MD
| | - Dimitrios Kapogiannis
- Laboratory of Neurosciences, Intramural Research Program, National Institute on Aging/National Institutes of Health (NIA/NIH), Baltimore, MD.
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126
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André C, Guzman-Quevedo O, Rey C, Rémus-Borel J, Clark S, Castellanos-Jankiewicz A, Ladeveze E, Leste-Lasserre T, Nadjar A, Abrous DN, Laye S, Cota D. Inhibiting Microglia Expansion Prevents Diet-Induced Hypothalamic and Peripheral Inflammation. Diabetes 2017; 66:908-919. [PMID: 27903745 DOI: 10.2337/db16-0586] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 11/24/2016] [Indexed: 11/13/2022]
Abstract
Cell proliferation and neuroinflammation in the adult hypothalamus may contribute to the pathogenesis of obesity. We tested whether the intertwining of these two processes plays a role in the metabolic changes caused by 3 weeks of a high-saturated fat diet (HFD) consumption. Compared with chow-fed mice, HFD-fed mice had a rapid increase in body weight and fat mass and specifically showed an increased number of microglia in the arcuate nucleus (ARC) of the hypothalamus. Microglia expansion required the adequate presence of fats and carbohydrates in the diet because feeding mice a very high-fat, very low-carbohydrate diet did not affect cell proliferation. Blocking HFD-induced cell proliferation by central delivery of the antimitotic drug arabinofuranosyl cytidine (AraC) blunted food intake, body weight gain, and adiposity. AraC treatment completely prevented the increase in number of activated microglia in the ARC, the expression of the proinflammatory cytokine tumor necrosis factor-α in microglia, and the recruitment of the nuclear factor-κB pathway while restoring hypothalamic leptin sensitivity. Central blockade of cell proliferation also normalized circulating levels of the cytokines leptin and interleukin 1β and decreased peritoneal proinflammatory CD86 immunoreactive macrophage number. These findings suggest that inhibition of diet-dependent microglia expansion hinders body weight gain while preventing central and peripheral inflammatory responses due to caloric overload.
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Affiliation(s)
- Caroline André
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
| | - Omar Guzman-Quevedo
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- Facultad de Químico-Farmacobiología, Universidad Michoacána de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Charlotte Rey
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
- University of Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
| | - Julie Rémus-Borel
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
- University of Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
| | - Samantha Clark
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
| | - Ashley Castellanos-Jankiewicz
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
| | - Elodie Ladeveze
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
| | - Thierry Leste-Lasserre
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
| | - Agnes Nadjar
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
- University of Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
| | - Djoher Nora Abrous
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
| | - Sophie Laye
- INRA, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
- University of Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286, Bordeaux, France
| | - Daniela Cota
- INSERM, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
- University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, Bordeaux, France
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127
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Liu W, Liu J, Xia J, Xue X, Wang H, Qi Z, Ji L. Leptin receptor knockout-induced depression-like behaviors and attenuated antidepressant effects of exercise are associated with STAT3/SOCS3 signaling. Brain Behav Immun 2017; 61:297-305. [PMID: 28069387 DOI: 10.1016/j.bbi.2017.01.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 12/24/2016] [Accepted: 01/05/2017] [Indexed: 01/16/2023] Open
Abstract
Relatively little has been known about pathophysiological mechanisms contributing to the development of neuropsychiatric symptoms in the context of metabolic syndrome. Impaired leptin signaling activation in db/db mice has been proposed as a potential link between behavioral and metabolic disorders. Our previous studies have shown that exercise has the beneficial effects on a depression-like and insulin-resistant state in mice. The present study aimed to determine whether and how leptin receptor knockout (db/db) induces depression-like behaviors, and to identify the antidepressant effects of swimming exercise in db/db mice. Our results support the validity of db/db mice as an animal model to study depression with metabolic abnormalities, but fail to confirm the improvement of exercise on depression. LepRb knockout-induced depression-like behaviors are associated with STAT3/SOCS3 signaling but independent of IKKβ/NFκB signaling. Our findings suggest the potential importance of LepRb as an exercise-regulated target for depression, also representing a new target underlying treatment-resistant depression.
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Affiliation(s)
- Weina Liu
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China; School of Physical Education & Health Care, East China Normal University, Shanghai 200241, China
| | - Jiatong Liu
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China; School of Physical Education & Health Care, East China Normal University, Shanghai 200241, China
| | - Jie Xia
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China; School of Physical Education & Health Care, East China Normal University, Shanghai 200241, China
| | - Xiangli Xue
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China; School of Physical Education & Health Care, East China Normal University, Shanghai 200241, China
| | - Hongmei Wang
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China; School of Physical Education & Health Care, East China Normal University, Shanghai 200241, China
| | - Zhengtang Qi
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China; School of Physical Education & Health Care, East China Normal University, Shanghai 200241, China.
| | - Liu Ji
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China; School of Physical Education & Health Care, East China Normal University, Shanghai 200241, China.
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128
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Wang H, Wang B, Yin H, Zhang G, Yu L, Kong X, Yuan H, Fang X, Liu Q, Liu C, Shi L. Reduced neurotrophic factor level is the early event before the functional neuronal deficiency in high-fat diet induced obese mice. Metab Brain Dis 2017; 32:247-257. [PMID: 27624843 DOI: 10.1007/s11011-016-9905-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 09/01/2016] [Indexed: 12/30/2022]
Abstract
Neurodegeneration is considered one of the possible complications of high fat diet (HFD) induced obesity. Much evidence has shown the close relationship between HFD and dementia at comparatively later stage of neuronal injury. It is so far not clear that the initial events of neuronal injury resulting from HFD and obesity. In the present research, obese mouse model achieved by 3-month HFD was applied for the investigation of the possible neuronal deficiency before the obvious cognitive decline. We found that 3-month HFD has already increased the average level of body weight of mice. But almost no obvious cognitive defect was observed. At such time point, we detected the cleavage of amyloid precursor protein (APP), including the expression and maturation level of α- and β-secretase and proteolytic fragment soluble APP. Results showed similar readout between HFD and normal diet (ND) mice. Besides, neuronal inflammation and brain-blood barrier permeability were also detected. No obvious changes could be observed between HFD and ND mice. Surprisingly, the first detectable neuronal changes was showed to be the downregulation of some neurotrpic factors, like neuronal growth factor β and brain derived neurotrophic factor, together with the activity of specific receptors, like Trk receptor phosphorylation. All the data piled up indicated that the early neuronal change in HFD induced obese mice was the downregulation of some neurotrophic factors. The results may provide the potential clue to therapeutic and preventive strategy for HFD induced cognitive decline.
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Affiliation(s)
- Huanhuan Wang
- School of Medicine, Hangzhou Normal University, Xuelin Street 16#,, Hangzhou, 310036, China.
| | - Bing Wang
- College of Life Science, Hangzhou Normal University, Hangzhou, China
| | - Hongping Yin
- School of Medicine, Hangzhou Normal University, Xuelin Street 16#,, Hangzhou, 310036, China
| | - Guoqing Zhang
- College of Public Health, Dalian Medical University, Dalian, China
| | - Liping Yu
- Center of Laboratory Animal, Hangzhou Normal University, Hangzhou, China
| | - Xiangmin Kong
- School of Medicine, Hangzhou Normal University, Xuelin Street 16#,, Hangzhou, 310036, China
| | - Haiying Yuan
- Department of Clinical Laboratory, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, China
| | - Xingyue Fang
- College of Science, Hainan Medical School, Hainan, China
| | - Qibing Liu
- College of Science, Hainan Medical School, Hainan, China
| | - Cuiqing Liu
- College of Basic Medicine, Zhejiang Chinese Medical University, Zhejiang, China
| | - Liyun Shi
- Department of Immunology, Nanjing University of Traditional Chinese Medicine, Xianlin Street 138#,, Nanjing, 210023, China.
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129
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Chen J, Zhan L, Lu X, Xiao C, Sun N. The Alteration of ZiBuPiYin Recipe on Proteomic Profiling of Forebrain Postsynaptic Density of db/db Mice with Diabetes-Associated Cognitive Decline. J Alzheimers Dis 2017; 56:471-489. [PMID: 27886008 DOI: 10.3233/jad-160691] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jing Chen
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Libin Zhan
- Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Xiaoguang Lu
- Department of Emergency Medicine, Zhongshan Hospital, Dalian University, Dalian, Liaoning, China
| | - Chi Xiao
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Nijing Sun
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
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130
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Zheng H, Zheng Y, Zhao L, Chen M, Bai G, Hu Y, Hu W, Yan Z, Gao H. Cognitive decline in type 2 diabetic db/db mice may be associated with brain region-specific metabolic disorders. Biochim Biophys Acta Mol Basis Dis 2017; 1863:266-273. [DOI: 10.1016/j.bbadis.2016.11.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 10/28/2016] [Accepted: 11/02/2016] [Indexed: 11/30/2022]
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131
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Zheng H, Zheng Y, Wang D, Cai A, Lin Q, Zhao L, Chen M, Deng M, Ye X, Gao H. Analysis of neuron-astrocyte metabolic cooperation in the brain of db/db mice with cognitive decline using 13C NMR spectroscopy. J Cereb Blood Flow Metab 2017; 37:332-343. [PMID: 26762505 PMCID: PMC5363750 DOI: 10.1177/0271678x15626154] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 12/01/2015] [Accepted: 12/07/2015] [Indexed: 01/24/2023]
Abstract
Type 2 diabetes has been linked to cognitive impairment, but its potential metabolic mechanism is still unclear. The present study aimed to explore neuron-astrocyte metabolic cooperation in the brain of diabetic (db/db, BKS.Cg-m+/+ Leprdb/J) mice with cognitive decline using 13C NMR technique in combination with intravenous [2-13C]-acetate and [3-13C]-lactate infusions. We found that the 13C-enrichment from [2-13C]-acetate into tricarboxylic acid cycle intermediate, succinate, was significantly decreased in db/db mice with cognitive decline compared with wild-type (WT, C57BLKS/J) mice, while an opposite result was obtained after [3-13C]-lactate infusion. Relative to WT mice, db/db mice with cognitive decline had significantly lower 13C labeling percentages in neurotransmitters including glutamine, glutamate, and γ-aminobutyric acid after [2-13C]-acetate infusion. However, [3-13C]-lactate resulted in increased 13C-enrichments in neurotransmitters in db/db mice with cognitive decline. This may indicate that the disturbance of neurotransmitter metabolism occurred during the development of cognitive decline. In addition, a reduction in 13C-labeling of lactate and an increase in gluconeogenesis were found from both labeled infusions in db/db mice with cognitive decline. Therefore, our results suggest that the development of cognitive decline in type 2 diabetes may be implicated to an unbalanced metabolism in neuron-astrocyte cooperation and an enhancement of gluconeogenesis.
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Affiliation(s)
- Hong Zheng
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yongquan Zheng
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China.,Radiology Department of the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Dan Wang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Aimin Cai
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Qiuting Lin
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Liangcai Zhao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Minjiang Chen
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Mingjie Deng
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xinjian Ye
- Radiology Department of the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Hongchang Gao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
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132
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Capuron L, Lasselin J, Castanon N. Role of Adiposity-Driven Inflammation in Depressive Morbidity. Neuropsychopharmacology 2017; 42:115-128. [PMID: 27402495 PMCID: PMC5143483 DOI: 10.1038/npp.2016.123] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/27/2016] [Accepted: 07/01/2016] [Indexed: 02/07/2023]
Abstract
Depression and metabolic disorders, including overweight and obesity, appear tightly interrelated. The prevalence of these conditions is concurrently growing worldwide, and both depression and overweight/obesity represent substantial risk factors for multiple medical complications. Moreover, there is now multiple evidence for a bidirectional relationship between depression and increased adiposity, with overweight/obesity being associated with an increased prevalence of depression, and in turn, depression augmenting the risk of weight gain and obesity. Although the reasons for this intricate link between depression and increased adiposity remain unclear, converging clinical and preclinical evidence points to a critical role for inflammatory processes and related alterations of brain functions. In support of this notion, increased adiposity leads to a chronic low-grade activation of inflammatory processes, which have been shown elsewhere to have a potent role in the pathophysiology of depression. It is therefore highly possible that adiposity-driven inflammation contributes to the development of depressive disorders and their growing prevalence worldwide. This review will present recent evidence in support of this hypothesis and will discuss the underlying mechanisms and potential therapeutic targets. Altogether, findings presented here should help to better understand the mechanisms linking adiposity to depression and facilitate the identification of new preventive and/or therapeutic strategies.
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Affiliation(s)
- Lucile Capuron
- Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), INRA, Bordeaux, France
- University of Bordeaux, Nutrition and Integrative Neurobiology (NutriNeuro), Bordeaux, France
| | - Julie Lasselin
- Institute of Medical Psychology and Behavioral Immunobiology, Universitäts Klinikum Essen, Essen, Germany
- Department of Clinical Neuroscience, Division for Psychology, Karolinska Institutet, Stockholm, Sweden
- Stress Research Institute, Stockholm University, Stockholm, Sweden
| | - Nathalie Castanon
- Laboratory of Nutrition and Integrative Neurobiology (NutriNeuro), INRA, Bordeaux, France
- University of Bordeaux, Nutrition and Integrative Neurobiology (NutriNeuro), Bordeaux, France
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133
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Almeida-Suhett CP, Graham A, Chen Y, Deuster P. Behavioral changes in male mice fed a high-fat diet are associated with IL-1β expression in specific brain regions. Physiol Behav 2016; 169:130-140. [PMID: 27876639 DOI: 10.1016/j.physbeh.2016.11.016] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 10/18/2016] [Accepted: 11/18/2016] [Indexed: 12/12/2022]
Abstract
High-fat diet (HFD)-induced obesity is associated with not only increased risk of metabolic and cardiovascular diseases, but cognitive deficit, depression and anxiety disorders. Obesity also leads to low-grade peripheral inflammation, which plays a major role in the development of metabolic alterations. Previous studies suggest that obesity-associated central inflammation may underlie the development of neuropsychiatric deficits, but further research is needed to clarify this relationship. We used 48 male C57BL/6J mice to investigate whether chronic consumption of a high-fat diet leads to increased expression of interleukin-1β (IL-1β) in the hippocampus, amygdala and frontal cortex. We also determined whether IL-1β expression in those brain regions correlates with changes in the Y-maze, open field, elevated zero maze and forced swim tests. After 16weeks on dietary treatments, HFD mice showed cognitive impairment on the Y-maze test, greater anxiety-like behavior during the open field and elevated zero maze tests, and increased depressive-like behavior in the forced swim test. Hippocampal and amygdalar expression of IL-1β were significantly higher in HFD mice than in control mice fed a standard diet (SD). Additionally, hippocampal GFAP and Iba1 immunoreactivity were increased in HFD mice when compared to SD controls. Cognitive performance negatively correlated with level of IL-1β in the hippocampus and amygdala whereas an observed increase in anxiety-like behavior was positively correlated with higher expression of IL-1β in the amygdala. However, we observed no association between depressive-like behavior and IL-1β expression in any of the brain regions investigated. Together our data provide evidence that mice fed a HFD exhibit cognitive deficits, anxiety and depressive-like behaviors. Our results also suggest that increased expression of IL-1β in the hippocampus and amygdala may be associated with the development of cognitive deficits and anxiety-like behavior, respectively.
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Affiliation(s)
- Camila P Almeida-Suhett
- Military and Emergency Medicine, Consortium for Health and Military Performance, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA.
| | - Alice Graham
- Military and Emergency Medicine, Consortium for Health and Military Performance, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Yifan Chen
- Military and Emergency Medicine, Consortium for Health and Military Performance, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Patricia Deuster
- Military and Emergency Medicine, Consortium for Health and Military Performance, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
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134
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Joffre C, Grégoire S, De Smedt V, Acar N, Bretillon L, Nadjar A, Layé S. Modulation of brain PUFA content in different experimental models of mice. Prostaglandins Leukot Essent Fatty Acids 2016; 114:1-10. [PMID: 27926457 DOI: 10.1016/j.plefa.2016.09.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/31/2016] [Accepted: 09/28/2016] [Indexed: 12/14/2022]
Abstract
The relative amounts of arachidonic acid (AA) and docosahexaenoic acid (DHA) govern the different functions of the brain. Their brain levels depend on structures considered, on fatty acid dietary supply and the age of animals. To have a better overview of the different models available in the literature we here compared the brain fatty acid composition in various mice models (C57BL/6J, CD1, Fat-1, SAMP8 mice) fed with different n-3 PUFA diets (deficient, balanced, enriched) in adults and aged animals. Our results demonstrated that brain AA and DHA content is 1) structure-dependent; 2) strain-specific; 3) differently affected by dietary approaches when compared to genetic model of PUFA modulation; 4) different in n-3 PUFA deficient aged C57BL6/J when compared to SAMP8 mouse model of aging. From these experiments, we highlight the difficulty to compare results obtained in different mouse models, different strains, different brain regions and different ages.
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Affiliation(s)
- Corinne Joffre
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux Cedex, Franceb University of Bordeaux, Bordeaux, France; Université de Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux Cedex, France.
| | - Stéphane Grégoire
- UMR CSGA 1324 INRA - 6265 CNRS - Université de Bourgogne, Eye, Nutrition and Signalization Research Group, F-21000 Dijon, France
| | - Véronique De Smedt
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux Cedex, Franceb University of Bordeaux, Bordeaux, France; Université de Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux Cedex, France
| | - Niyazi Acar
- UMR CSGA 1324 INRA - 6265 CNRS - Université de Bourgogne, Eye, Nutrition and Signalization Research Group, F-21000 Dijon, France
| | - Lionel Bretillon
- UMR CSGA 1324 INRA - 6265 CNRS - Université de Bourgogne, Eye, Nutrition and Signalization Research Group, F-21000 Dijon, France
| | - Agnès Nadjar
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux Cedex, Franceb University of Bordeaux, Bordeaux, France; Université de Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux Cedex, France
| | - Sophie Layé
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux Cedex, Franceb University of Bordeaux, Bordeaux, France; Université de Bordeaux 2, 146 rue Léo Saignat, 33076 Bordeaux Cedex, France
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135
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Niemiro GM, Raine LB, Khan NA, Emmons R, Little J, Kramer AF, Hillman CH, De Lisio M. Circulating progenitor cells are positively associated with cognitive function among overweight/obese children. Brain Behav Immun 2016; 57:47-52. [PMID: 27132057 PMCID: PMC7404617 DOI: 10.1016/j.bbi.2016.03.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 03/11/2016] [Accepted: 03/23/2016] [Indexed: 12/18/2022] Open
Abstract
Recent evidence has indicated that overweight/obese children may experience cognitive and immune dysfunction, but the underlying mechanisms responsible for the association between overweight/obesity, immune dysfunction, and cognition have yet to be established. The present study aimed to identify a novel link between obesity-induced immune system dysregulation and cognition in preadolescent children. A total of 27 male children (age: 8-10years) were recruited and separated by body mass index (BMI) into healthy weight (HW: 5th-84.9th percentile, n=16) and overweight/obese (OW: ⩾85th percentile, n=11) groups. Adiposity was assessed using dual energy X-ray absorptiometry (DXA), and aspects of executive function were assessed using the Woodcock-Johnson III Tests of Cognitive Abilities. Monocyte populations (CD14(+)CD16(-), CD14(+)CD16(+)) with and without expression of chemokine receptor type 2 (CCR2), and circulating progenitor cells (CPCs: CD34(+)CD45(dim)), in peripheral blood were quantified by flow cytometry. CPCs were isolated by flow sorting and cultured for 24h for collection of conditioned media (CM) that was applied to SH-SY5Y neuroblastomas to examine the paracrine effects of CPCs on neurogenesis. OW had significantly higher quantities of both populations of monocytes (CD14(+)CD16(-): 57% increase; CD14(+)CD16(+): 95% increase, both p<0.01), monocytes expressing CCR2 (CD14(+)CD16(-)CCR2(+): 66% increase; CD14(+)CD16(+)CCR2(+): 168% increase, both p<0.01), and CPCs (47% increase, p<0.05) than HW. CPCs were positively correlated with abdominal adiposity in OW, and negatively correlated in HW with a significant difference between correlations (p<0.05). CPC content was positively correlated with executive processes in OW, and negatively correlated in HW with a significant difference in the strength of the correlations between groups (p<0.05 for correlation between OW and HW). Finally, CPC-CM from OW trended to increase neuroblast viability in vitro relative to HW (1.79 fold, p=0.07). These novel findings indicate that increased content of CPCs among OW children may play a role in preventing decrements in cognitive function via paracrine mechanisms.
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Affiliation(s)
- Grace M. Niemiro
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States
| | - Lauren B. Raine
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States
| | - Naiman A. Khan
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States
| | - Russell Emmons
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States
| | - Jonathan Little
- School of Health and Exercise Sciences, University of British Columbia Okanagan, Canada
| | - Arthur F. Kramer
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, United States
| | - Charles H. Hillman
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, United States
| | - Michael De Lisio
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States.
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136
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Cai M, Wang H, Li JJ, Zhang YL, Xin L, Li F, Lou SJ. The signaling mechanisms of hippocampal endoplasmic reticulum stress affecting neuronal plasticity-related protein levels in high fat diet-induced obese rats and the regulation of aerobic exercise. Brain Behav Immun 2016; 57:347-359. [PMID: 27189035 DOI: 10.1016/j.bbi.2016.05.010] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 05/12/2016] [Accepted: 05/13/2016] [Indexed: 12/24/2022] Open
Abstract
High fat diet (HFD)-induced obesity has been shown to reduce the levels of neuronal plasticity-related proteins, specifically brain-derived neurotrophic factor (BDNF) and synaptophysin (SYN), in the hippocampus. However, the underlying mechanisms are not fully clear. Endoplasmic reticulum stress (ERS) has been reported to play a key role in regulating gene expression and protein production by affecting stress signaling pathways and ER functions of protein folding and post-translational modification in peripheral tissues of obese rodent models. Additionally, HFD that is associated with hyperglycemia could induce hippocampal ERS, thus impairing insulin signaling and cognitive health in HFD mice. One goal of this study was to determine whether hyperglycemia and hyperlipidemia could cause hippocampal ERS in HFD-induced obese SD rats, and explore the potential mechanisms of ERS regulating hippocampal BDNF and SYN proteins production. Additionally, although regular aerobic exercise could reduce central inflammation and elevate hippocampal BDNF and SYN levels in obese rats, the regulated mechanisms are poorly understood. Nrf2-HO-1 pathways play roles in anti-ERS, anti-inflammation and anti-apoptosis in peripheral tissues. Therefore, the other goal of this study was to determine whether aerobic exercise could activate Nrf2-HO-1 in hippocampus to alleviate obesity-induced hippocampal ERS, which would lead to increased BDNF and SYN levels. Male SD rats were fed on HFD for 8weeks to establish the obese model. Then, 8weeks of aerobic exercise treadmill intervention was arranged for the obese rats. Results showed that HFD-induced obesity caused hyperglycemia and hyperlipidemia, and significantly promoted hippocampal glucose transporter 3 (GLUT3) and fatty acid transport protein 1 (FATP1) protein expression. These results were associated with the activation of hippocampal ERS and ERS-mediated apoptosis. At the same time, we found that excessive hippocampal ERS not only significantly decreased proBDNF-the precursor of mature BDNF, but also attenuated p38/ERK-CREB signaling pathways and activated NLRP3-IL-1β pathways in obese rats. These results were associated with reduced BDNF and SYN protein production. However, these adverse changes were obviously reversed by aerobic exercise intervention through activating the Nrf2-HO-1 pathways. These results suggest that dietary obesity could induce hippocampal ERS in male SD rats, and excessive hippocampal ERS plays a critical role in decreasing the levels of BDNF and SYN. Moreover, aerobic exercise could activate hippocampal Nrf2 and HO-1 to relieve ERS and heighten BDNF and SYN production in obese rats.
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Affiliation(s)
- Ming Cai
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China
| | - Hong Wang
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China; College of Rehabilitation Sciences, Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Jing-Jing Li
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China
| | - Yun-Li Zhang
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China
| | - Lei Xin
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China
| | - Feng Li
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China
| | - Shu-Jie Lou
- Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China.
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137
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Dinel AL, Rey C, Baudry C, Fressange-Mazda C, Le Ruyet P, Nadjar A, Pallet P, Joffre C, Layé S. Enriched dairy fat matrix diet prevents early life lipopolysaccharide-induced spatial memory impairment at adulthood. Prostaglandins Leukot Essent Fatty Acids 2016; 113:9-18. [PMID: 27720041 DOI: 10.1016/j.plefa.2016.08.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/22/2016] [Accepted: 08/22/2016] [Indexed: 10/21/2022]
Abstract
Polyunsaturated fatty acids (PUFAs) are essential fatty acids, which are critical for brain development and later life cognitive functions. The main brain PUFAs are docosahexaenoic acid (DHA) for the n-3 family and arachidonic acid (ARA) for the n-6 family, which are provided to the post-natal brain by breast milk or infant formula. Recently, the use of dairy lipids (DL) in replacement of vegetable lipids (VL) was revealed to potently promote the accretion of DHA in the developing brain. Brain DHA, in addition to be a key component of brain development, display potent anti-inflammatory activities, which protect the brain from adverse inflammatory events. In this work, we evaluated the protective effect of partial replacement of VL by DL, supplemented or not with DHA and ARA, on post-natal inflammation and its consequence on memory. Mice were fed with diets poor in vegetal n-3 PUFA (Def VL), balanced in vegetal n-3/n-6 PUFA (Bal VL), balanced in dairy lipids (Bal DL) or enriched in DHA and ARA (Supp VL; Supp DL) from the first day of gestation until adulthood. At post-natal day 14 (PND14), pups received a single administration of the endotoxin lipopolysaccharide (LPS) and brain cytokine expression, microglia phenotype and neurogenesis were measured. In a second set of experiments, memory and neurogenesis were measured at adulthood. Overall, our data showed that lipid quality of the diet modulates early life LPS effect on microglia phenotype, brain cytokine expression and neurogenesis at PND14 and memory at adulthood. In particular, Bal DL diet protects from the adverse effect of early life LPS exposure on PND14 neurogenesis and adult spatial memory.
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Affiliation(s)
- A L Dinel
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux, France; University of Bordeaux, Bordeaux, France.
| | - C Rey
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux, France; University of Bordeaux, Bordeaux, France; ITERG, Institut des Corps Gras, 33600 Pessac, France
| | - C Baudry
- Lactalis, R&D, Retiers F-35240, France
| | | | | | - A Nadjar
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux, France; University of Bordeaux, Bordeaux, France
| | - P Pallet
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux, France; University of Bordeaux, Bordeaux, France
| | - C Joffre
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux, France; University of Bordeaux, Bordeaux, France
| | - S Layé
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, 33076 Bordeaux, France; University of Bordeaux, Bordeaux, France
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138
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Abstract
Both type 1 (T1DM) and type 2 diabetes mellitus (T2DM) have been associated with reduced performance on multiple domains of cognitive function and with evidence of abnormal structural and functional brain magnetic resonance imaging (MRI). Cognitive deficits may occur at the very earliest stages of diabetes and are further exacerbated by the metabolic syndrome. The duration of diabetes and glycemic control may have an impact on the type and severity of cognitive impairment, but as yet we cannot predict who is at greatest risk of developing cognitive impairment. The pathophysiology of cognitive impairment is multifactorial, although dysfunction in each interconnecting pathway ultimately leads to discordance in metabolic signaling. The pathophysiology includes defects in insulin signaling, autonomic function, neuroinflammatory pathways, mitochondrial (Mt) metabolism, the sirtuin-peroxisome proliferator-activated receptor-gamma co-activator 1α (SIRT-PGC-1α) axis, and Tau signaling. Several promising therapies have been identified in pre-clinical studies, but remain to be validated in clinical trials.
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Affiliation(s)
- Lindsay A Zilliox
- Department of Neurology, Maryland VA Healthcare System and University of Maryland, 110 South Paca Street, Baltimore, MD, 21201, USA
| | - Krish Chadrasekaran
- Department of Neurology, Maryland VA Healthcare System and University of Maryland, 110 South Paca Street, Baltimore, MD, 21201, USA
| | - Justin Y Kwan
- Department of Neurology, Maryland VA Healthcare System and University of Maryland, 110 South Paca Street, Baltimore, MD, 21201, USA
| | - James W Russell
- Department of Neurology, Maryland VA Healthcare System and University of Maryland, 110 South Paca Street, Baltimore, MD, 21201, USA.
- School of Medicine, Department of Neurology, University of Maryland, 3S-129, 110 South Paca Street, Baltimore, MD, 21201-1595, USA.
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139
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Effect of high-fat diets on mood and learning performance in adolescent mice. Behav Brain Res 2016; 311:167-172. [DOI: 10.1016/j.bbr.2016.04.052] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 04/21/2016] [Accepted: 04/25/2016] [Indexed: 01/05/2023]
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140
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Immunotherapeutic effects of lymphocytes co-cultured with human cord blood-derived multipotent stem cells transplantation on APP/PS1 mice. Behav Brain Res 2016; 315:94-102. [PMID: 27528555 DOI: 10.1016/j.bbr.2016.08.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/09/2016] [Accepted: 08/11/2016] [Indexed: 01/24/2023]
Abstract
Alzheimer's disease (AD) is an inexorable neurodegenerative disease that involves neuroinflammation in the brain, in addition to abnormal accumulation of amyloid-β (Aβ) and hyperphosphorylated tau. Evidence shows that human cord blood-derived multipotent stem cells (CB-SCs) can modulate autoimmune responses by altering regulatory T cells (Tregs). Our previous study found that CB-SCs could regulate the peripheral immune system of AD patients in vitro, mainly increasing the proportion of Tregs and anti-inflammatory cytokines. To further investigate the effects of lymphocytes co-cultured with CB-SCs on AD, the APP/PS1 mice received monthly transplants of lymphocytes co-cultured with CB-SCs for 4 months. Then, the ethological and biochemical experiments were conducted. We found that APP/PS1 mice injected with lymphocytes co-cultured with CB-SCs showed improved spatial learning, which significantly correlated with fewer Aβ plaques in brain. The present study also indicated that lymphocytes co-cultured with CB-SCs could promote the protective and reparative cytokines in the peripheral blood and brain to alleviate neuroinflammation in AD mice. These findings conclude that the systemic transplantation of lymphocytes co-cultured with CB-SCs can improve cognitive and pathological impairment of APP/PS1 mice via an immunomodulatory effect.
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141
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Noble EE, Kanoski SE. Early life exposure to obesogenic diets and learning and memory dysfunction. Curr Opin Behav Sci 2016; 9:7-14. [PMID: 26858972 DOI: 10.1016/j.cobeha.2015.11.014] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Obesogenic dietary factors, such as simple sugars and saturated fatty acids, have been linked to memory impairments and hippocampal dysfunction. Recent evidence suggests that the brain may be particularly vulnerable to the effects of obesogenic diets during early life periods of rapid growth, maturation, and brain development. Investigations utilizing rodent models indicate that early life exposure to "high fat diets" (40-65% kcal derived from fat) or simple sugars (sucrose or high fructose corn syrup) can impair hippocampus-dependent learning and memory processes. In some cases, these deficits occur independent of obesity and metabolic derangement and can persist into adulthood despite dietary intervention. Various neurobiological mechanisms have been identified that may link early life consumption of obesogenic dietary factors with hippocampal dysfunction, including increased neuroinflammation and reduced neurotrophin mediated regulation of neurogenesis and synaptic plasticity. Age, duration of exposure, and dietary composition are key variables contributing to the interaction between early life diet and cognitive dysfunction, however, more research is needed to unravel the precise critical windows of development and causal dietary factors.
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Affiliation(s)
- Emily E Noble
- Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, Los Angeles, CA, USA
| | - Scott E Kanoski
- Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, Los Angeles, CA, USA
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142
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Lemche E, Chaban OS, Lemche AV. Neuroendocrinological and Epigenetic Mechanisms Subserving Autonomic Imbalance and HPA Dysfunction in the Metabolic Syndrome. Front Neurosci 2016; 10:142. [PMID: 27147943 PMCID: PMC4830841 DOI: 10.3389/fnins.2016.00142] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 03/21/2016] [Indexed: 12/18/2022] Open
Abstract
Impact of environmental stress upon pathophysiology of the metabolic syndrome (MetS) has been substantiated by epidemiological, psychophysiological, and endocrinological studies. This review discusses recent advances in the understanding of causative roles of nutritional factors, sympathomedullo-adrenal (SMA) and hypothalamic-pituitary adrenocortical (HPA) axes, and adipose tissue chronic low-grade inflammation processes in MetS. Disturbances in the neuroendocrine systems for leptin, melanocortin, and neuropeptide Y (NPY)/agouti-related protein systems have been found resulting directly in MetS-like conditions. The review identifies candidate risk genes from factors shown critical for the functioning of each of these neuroendocrine signaling cascades. In its meta-analytic part, recent studies in epigenetic modification (histone methylation, acetylation, phosphorylation, ubiquitination) and posttranscriptional gene regulation by microRNAs are evaluated. Several studies suggest modification mechanisms of early life stress (ELS) and diet-induced obesity (DIO) programming in the hypothalamic regions with populations of POMC-expressing neurons. Epigenetic modifications were found in cortisol (here HSD11B1 expression), melanocortin, leptin, NPY, and adiponectin genes. With respect to adiposity genes, epigenetic modifications were documented for fat mass gene cluster APOA1/C3/A4/A5, and the lipolysis gene LIPE. With regard to inflammatory, immune and subcellular metabolism, PPARG, NKBF1, TNFA, TCF7C2, and those genes expressing cytochrome P450 family enzymes involved in steroidogenesis and in hepatic lipoproteins were documented for epigenetic modifications.
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Affiliation(s)
- Erwin Lemche
- Section of Cognitive Neuropsychiatry, Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London London, UK
| | - Oleg S Chaban
- Section of Psychosomatic Medicine, Bogomolets National Medical University Kiev, Ukraine
| | - Alexandra V Lemche
- Department of Medical Science, Institute of Clinical Research Berlin, Germany
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143
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Habibi F, Ghadiri Soufi F, Ghiasi R, Khamaneh AM, Alipour MR. Alteration in Inflammation-related miR-146a Expression in NF-KB Signaling Pathway in Diabetic Rat Hippocampus. Adv Pharm Bull 2016; 6:99-103. [PMID: 27123424 PMCID: PMC4845552 DOI: 10.15171/apb.2016.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Revised: 02/18/2016] [Accepted: 02/22/2016] [Indexed: 11/09/2022] Open
Abstract
PURPOSE The purpose of the present study is to evaluate the expression of miR-146a gene, its adaptor genes (TRAF6, NF-KB, and IRAK1), and possible changes in the cellular signaling pathway in diabetic hippocampus tissue. METHODS Male Sprague-Dawley rats are randomly selected and divided into control and diabetic (n=6) groups. Diabetes induced by the single-dose injection of nicotinamide [110 mg/kg, (i.p.)], 15 min before streptozotocin (50 mg/kg; i.p.) in 12-h fasted rats. The rats are kept at the laboratory for two months. After anaesthetization, hippocampus of the rats was removed in order to measure the expression of miR-146a, NFK-B, IRAK1, and TRAF6 genes using real-time PCR and activity of NF-KB as well as amount of apoptosis rate using ELISA. RESULTS The results indicated a reduction in expression of miR-146a and an increase in expression of IRAK1, NF-KB, and TRAF6 genes in the hippocampus of diabetic rats compared to control. Also it reveals an increase in the activity of NF-KB and apoptosis rate in the hippocampus of diabetic rats. CONCLUSION Our results report the probability that reduction of miR-146a expression in the negative feedback loop between miR-146a and NF-KB increases NF-kB expression and thus intensifies inflammation and apoptosis in hippocampus.
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Affiliation(s)
- Fatemeh Habibi
- Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farhad Ghadiri Soufi
- Molecular Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Rafighe Ghiasi
- Department of Physiology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Mahdi Khamaneh
- School of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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144
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Gaspar JM, Baptista FI, Macedo MP, Ambrósio AF. Inside the Diabetic Brain: Role of Different Players Involved in Cognitive Decline. ACS Chem Neurosci 2016; 7:131-42. [PMID: 26667832 DOI: 10.1021/acschemneuro.5b00240] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Diabetes mellitus is the most common metabolic disease, and its prevalence is increasing. A growing body of evidence, both in animal models and epidemiological studies, has demonstrated that metabolic diseases like obesity, insulin resistance, and diabetes are associated with alterations in the central nervous system (CNS), being linked with development of cognitive and memory impairments and presenting a higher risk for dementia and Alzheimer's disease. The rising prevalence of diabetes together with its increasing earlier onset suggests that diabetes-related cognitive dysfunction will increase in the near future, causing substantial socioeconomic impact. Decreased insulin secretion or action, dysregulation of glucose homeostasis, impairment in the hypothalamic-pituitary-adrenal axis, obesity, hyperleptinemia, and inflammation may act independently or synergistically to disrupt neuronal homeostasis and cause diabetes-associated cognitive decline. However, the crosstalk between those factors and the mechanisms underlying the diabetes-related CNS complications is still elusive. During the past few years, different strategies (neuroprotective and antioxidant drugs) have emerged as promising therapies for this complication, which still remains to be preventable or treatable. This Review summarizes fundamental past and ongoing research on diabetes-associated cognitive decline, highlighting potential contributors, mechanistic mediators, and new pharmacological approaches to prevent and/or delay this complication.
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Affiliation(s)
- Joana M. Gaspar
- CEDOC,
Chronic Diseases Research Centre, NOVA Medical School/Faculdade de
Ciências Médicas, Universidade Nova de Lisboa, Edifício
CEDOC - IIRua Câmara Pestana no. 6, 6A e 6B, 1150-082 Lisboa, Portugal
- Institute
for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Portuguese Diabetes Association (APDP), R. do Salitre 118-120, 1250-203 Lisboa, Portugal
| | - Filipa I. Baptista
- Institute
for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- CNC.IBILI
Consortium, University of Coimbra, 3004-517 Coimbra, Portugal
| | - M. Paula Macedo
- CEDOC,
Chronic Diseases Research Centre, NOVA Medical School/Faculdade de
Ciências Médicas, Universidade Nova de Lisboa, Edifício
CEDOC - IIRua Câmara Pestana no. 6, 6A e 6B, 1150-082 Lisboa, Portugal
- Portuguese Diabetes Association (APDP), R. do Salitre 118-120, 1250-203 Lisboa, Portugal
| | - António F. Ambrósio
- Institute
for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- CNC.IBILI
Consortium, University of Coimbra, 3004-517 Coimbra, Portugal
- AIBILI, 3000-548 Coimbra, Portugal
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145
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Obesity Reduces Cognitive and Motor Functions across the Lifespan. Neural Plast 2016; 2016:2473081. [PMID: 26881095 PMCID: PMC4737453 DOI: 10.1155/2016/2473081] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/15/2015] [Indexed: 12/11/2022] Open
Abstract
Due to a sedentary lifestyle, more and more people are becoming obese nowadays. In addition to health-related problems, obesity can also impair cognition and motor performance. Previous results have shown that obesity mainly affects cognition and motor behaviors through altering brain functions and musculoskeletal system, respectively. Many factors, such as insulin/leptin dysregulation and inflammation, mediate the effect of obesity and cognition and motor behaviors. Substantial evidence has suggested exercise to be an effective way to improve obesity and related cognitive and motor dysfunctions. This paper aims to discuss the association of obesity with cognition and motor behaviors and its underlying mechanisms. Following this, mechanisms of exercise to improve obesity-related dysfunctions are described. Finally, implications and future research direction are raised.
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146
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Wang H, Chen F, Zhong KL, Tang SS, Hu M, Long Y, Miao MX, Liao JM, Sun HB, Hong H. PPARγ agonists regulate bidirectional transport of amyloid-β across the blood-brain barrier and hippocampus plasticity in db/db mice. Br J Pharmacol 2015; 173:372-85. [PMID: 26507867 DOI: 10.1111/bph.13378] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 10/18/2015] [Accepted: 10/21/2015] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND AND PURPOSE There is emerging evidence suggesting that abnormal transport of amyloid-β (Aβ) across the blood-brain barrier (BBB) is involved in diabetes-associated cognitive decline. We investigated whether PPARγ agonists restore Aβ transport across the BBB and hippocampal plasticity in db/db mice. EXPERIMENTAL APPROACH Efflux and influx of Aβ across the BBB were determined by stereotaxic intra-cerebral or i.a. infusion of [(125) I]-Aβ1-40 respectively. Receptor for advanced glycation end products (RAGE) and low-density lipoprotein receptor-related protein 1 (LRP1), which are involved in Aβ influx and efflux, PPARγ and NF-κB p65 at the BBB, as well as hippocampal Aβ, caspase-3, Bax and Bcl-2 were assayed by Western blot, immunohistochemistry and RT-PCR. In vivo, hippocampal LTP was recorded, and Morris water maze and Y-maze tasks were performed. KEY RESULTS Treatment with PPARγ agonists, rosiglitazone (0.8 mg·kg(-1) ) and pioglitazone (9.0 mg·kg(-1) ), for 6 weeks significantly increased Aβ efflux and decreased Aβ influx across the BBB in db/db mice. Concomitantly, they decreased hippocampal Aβ1-40 and Aβ1-42 , suppressed neuronal apoptosis, as indicated by decreased caspase-3 activity and increased ratio of Bcl-2/Bax, and increased hippocampal plasticity, characterized by an enhanced in vivo LTP and better performance in behavioural tests. Furthermore, the PPARγ agonists induced the expression of LRP1 gene by activation of PPARγ and suppressed RAGE gene expression by inactivation of NF-κB signalling at the BBB of db/db mice. CONCLUSIONS AND IMPLICATIONS PPARγ agonists modify abnormal Aβ transport across the BBB and this is accompanied by amelioration of β-amyloidosis and an improvement in hippocampal plasticity in diabetic mice.
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Affiliation(s)
- Hao Wang
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Fang Chen
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Kai Long Zhong
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Su Su Tang
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Mei Hu
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Yan Long
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Ming Xing Miao
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Jian Min Liao
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Hong Bing Sun
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
| | - Hao Hong
- Department of Pharmacology, China Pharmaceutical University, Nanjing, China.,Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University, Nanjing, China
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147
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Fadel JR, Reagan LP. Stop signs in hippocampal insulin signaling: the role of insulin resistance in structural, functional and behavioral deficits. Curr Opin Behav Sci 2015; 9:47-54. [PMID: 26955646 DOI: 10.1016/j.cobeha.2015.12.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In peripheral tissues insulin activates signaling cascades to facilitate glucose uptake from the blood into tissues like liver, muscle and fat. While insulin appears to play a minor role in the regulation of glucose uptake in the central nervous system (CNS), insulin is known to play a major role in regulating synaptic plasticity in brain regions like the hippocampus. The concept that insulin regulates hippocampal neuroplasticity is further supported from animal models of type 2 diabetes (T2DM) and Alzheimer's disease (AD). The goal of this review is to provide an overview of these studies, as well as the studies that have examined whether deficits in hippocampal insulin signaling are amenable to intervention strategies.
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Affiliation(s)
- Jim R Fadel
- Department of Pharmacology, Physiology and Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Lawrence P Reagan
- Department of Pharmacology, Physiology and Neuroscience, University of South Carolina School of Medicine, Columbia, SC, USA; WJB Dorn Veterans Affairs Medical Center, Columbia, SC, USA
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148
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Abstract
Clinical studies suggest a link between type 2 diabetes mellitus (T2DM) and insulin resistance (IR) and cognitive dysfunction, but there are significant gaps in our knowledge of the mechanisms underlying this relationship. Animal models of IR help to bridge these gaps and point to hippocampal IR as a potential mediator of cognitive dysfunction in T2DM, as well as in Alzheimer disease (AD). This Review highlights these observations and discusses intervention studies which suggest that the restoration of insulin activity in the hippocampus may be an effective strategy to alleviate the cognitive decline associated with T2DM and AD.
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149
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Castanon N, Luheshi G, Layé S. Role of neuroinflammation in the emotional and cognitive alterations displayed by animal models of obesity. Front Neurosci 2015; 9:229. [PMID: 26190966 PMCID: PMC4490252 DOI: 10.3389/fnins.2015.00229] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 06/11/2015] [Indexed: 12/15/2022] Open
Abstract
Obesity is associated with a high prevalence of mood disorders and cognitive dysfunctions in addition to being a significant risk factor for important health complications such as cardiovascular diseases and type 2 diabetes. Identifying the pathophysiological mechanisms underlying these health issues is a major public health challenge. Based on recent findings, from studies conducted on animal models of obesity, it has been proposed that inflammatory processes may participate in both the peripheral and brain disorders associated with the obesity condition including the development of emotional and cognitive alterations. This is supported by the fact that obesity is characterized by peripheral low-grade inflammation, originating from increased adipose tissue mass and/or dysbiosis (changes in gut microbiota environment), both of which contribute to increased susceptibility to immune-mediated diseases. In this review, we provide converging evidence showing that obesity is associated with exacerbated neuroinflammation leading to dysfunction in vulnerable brain regions associated with mood regulation, learning, and memory such as the hippocampus. These findings give new insights to the pathophysiological mechanisms contributing to the development of brain disorders in the context of obesity and provide valuable data for introducing new therapeutic strategies for the treatment of neuropsychiatric complications often reported in obese patients.
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Affiliation(s)
- Nathalie Castanon
- Nutrition and Integrative Neurobiology, INRA, UMR 1286, Université de Bordeaux Bordeaux, France
| | - Giamal Luheshi
- Department of Psychiatry, Douglas Mental Health University Institute, McGill University Montreal, Canada
| | - Sophie Layé
- Nutrition and Integrative Neurobiology, INRA, UMR 1286, Université de Bordeaux Bordeaux, France
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150
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Asatryan L, Khoja S, Rodgers KE, Alkana RL, Tsukamoto H, Davies DL. Chronic ethanol exposure combined with high fat diet up-regulates P2X7 receptors that parallels neuroinflammation and neuronal loss in C57BL/6J mice. J Neuroimmunol 2015. [PMID: 26198936 DOI: 10.1016/j.jneuroim.2015.06.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The present investigation tested the role of ATP-activated P2X7 receptors (P2X7Rs) in alcohol-induced brain damage using a model that combines intragastric (iG) ethanol feeding and high fat diet in C57BL/6J mice (Hybrid). The Hybrid paradigm caused increased levels of pro-inflammatory markers, changes in microglia and astrocytes, reduced levels of neuronal marker NeuN and increased P2X7R expression in ethanol-sensitive brain regions. Observed changes in P2X7R and NeuN expression were more pronounced in Hybrid paradigm with inclusion of additional weekly binges. In addition, high fat diet during Hybrid exposure aggravated the increase in P2X7R expression and activation of glial cells.
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Affiliation(s)
- Liana Asatryan
- Titus Family Department of Clinical Pharmacy and Pharmaceutical Economics and PolicySchool of PharmacyUniversity of Southern California1985 Zonal Avenue, Los Angeles, CA, 90033, United States.
| | - Sheraz Khoja
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, 1985 Zonal Avenue, Los Angeles, CA 90033, United States
| | - Kathleen E Rodgers
- Titus Family Department of Clinical Pharmacy and Pharmaceutical Economics and PolicySchool of PharmacyUniversity of Southern California1985 Zonal Avenue, Los Angeles, CA, 90033, United States
| | - Ronald L Alkana
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, 1985 Zonal Avenue, Los Angeles, CA 90033, United States
| | - Hidekazu Tsukamoto
- Southern California Research Center for Alcoholic Liver and Pancreatic Disease and Cirrhosis, Keck School of Medicine, University of Southern California, 1333 San Pablo Street, Los Angeles, CA 90033, United States
| | - Daryl L Davies
- Titus Family Department of Clinical Pharmacy and Pharmaceutical Economics and PolicySchool of PharmacyUniversity of Southern California1985 Zonal Avenue, Los Angeles, CA, 90033, United States
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