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Deng X, Peng D, Yao Y, Huang K, Wang J, Ma Z, Fu J, Xu Y. Optogenetic therapeutic strategies for diabetes mellitus. J Diabetes 2024; 16:e13557. [PMID: 38751366 PMCID: PMC11096815 DOI: 10.1111/1753-0407.13557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 02/28/2024] [Accepted: 03/11/2024] [Indexed: 05/18/2024] Open
Abstract
Diabetes mellitus (DM) is a common chronic disease affecting humans globally. It is characterized by abnormally elevated blood glucose levels due to the failure of insulin production or reduction of insulin sensitivity and functionality. Insulin and glucagon-like peptide (GLP)-1 replenishment or improvement of insulin resistance are the two major strategies to treat diabetes. Recently, optogenetics that uses genetically encoded light-sensitive proteins to precisely control cell functions has been regarded as a novel therapeutic strategy for diabetes. Here, we summarize the latest development of optogenetics and its integration with synthetic biology approaches to produce light-responsive cells for insulin/GLP-1 production, amelioration of insulin resistance and neuromodulation of insulin secretion. In addition, we introduce the development of cell encapsulation and delivery methods and smart bioelectronic devices for the in vivo application of optogenetics-based cell therapy in diabetes. The remaining challenges for optogenetics-based cell therapy in the clinical translational study are also discussed.
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Affiliation(s)
- Xin Deng
- Department of EndocrinologyChildren's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child HealthHangzhouChina
- Department of Biomedical Engineering, MOE Key Laboratory of Biomedical Engineering, Zhejiang Provincial Key Laboratory of Cardio‐Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang Provincial Key Laboratory of Traditional Chinese Medicine for Clinical Evaluation and Translational ResearchZhejiang UniversityHangzhouChina
| | - Dandan Peng
- Department of EndocrinologyChildren's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child HealthHangzhouChina
| | - Yuanfa Yao
- Department of Biomedical Engineering, MOE Key Laboratory of Biomedical Engineering, Zhejiang Provincial Key Laboratory of Cardio‐Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang Provincial Key Laboratory of Traditional Chinese Medicine for Clinical Evaluation and Translational ResearchZhejiang UniversityHangzhouChina
| | - Ke Huang
- Department of EndocrinologyChildren's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child HealthHangzhouChina
| | - Jinling Wang
- Department of EndocrinologyChildren's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child HealthHangzhouChina
| | - Zhihao Ma
- Department of Biomedical Engineering, MOE Key Laboratory of Biomedical Engineering, Zhejiang Provincial Key Laboratory of Cardio‐Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang Provincial Key Laboratory of Traditional Chinese Medicine for Clinical Evaluation and Translational ResearchZhejiang UniversityHangzhouChina
| | - Junfen Fu
- Department of EndocrinologyChildren's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child HealthHangzhouChina
| | - Yingke Xu
- Department of EndocrinologyChildren's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child HealthHangzhouChina
- Department of Biomedical Engineering, MOE Key Laboratory of Biomedical Engineering, Zhejiang Provincial Key Laboratory of Cardio‐Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang Provincial Key Laboratory of Traditional Chinese Medicine for Clinical Evaluation and Translational ResearchZhejiang UniversityHangzhouChina
- Binjiang Institute of Zhejiang UniversityHangzhouChina
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Sharma K, Puranik N, Yadav D. Neural Stem Cell-based Regenerative Therapy: A New Approach to Diabetes Treatment. Endocr Metab Immune Disord Drug Targets 2024; 24:531-540. [PMID: 37183465 DOI: 10.2174/1871530323666230512121416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 05/16/2023]
Abstract
Diabetes mellitus (DM) is the most common metabolic disorder that occurs due to the loss, or impaired function of insulin-secreting pancreatic beta cells, which are of two types - type 1 (T1D) and type 2 (T2D). To cure DM, the replacement of the destroyed pancreatic beta cells of islet of Langerhans is the most widely practiced treatment. For this, isolating neuronal stem cells and cultivating them as a source of renewable beta cells is a significant breakthrough in medicine. The functions, growth, and gene expression of insulin-producing pancreatic beta cells and neurons are very similar in many ways. A diabetic patient's neural stem cells (obtained from the hippocampus and olfactory bulb) can be used as a replacement source of beta cells for regenerative therapy to treat diabetes. The same protocol used to create functional neurons from progenitor cells can be used to create beta cells. Recent research suggests that replacing lost pancreatic beta cells with autologous transplantation of insulin-producing neural progenitor cells may be a perfect therapeutic strategy for diabetes, allowing for a safe and normal restoration of function and a reduction in potential risks and a long-term cure.
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Affiliation(s)
- Kajal Sharma
- School of Sciences in Biotechnology, Jiwaji University, Gwalior, 474011, Madhya Pradesh, India
| | - Nidhi Puranik
- Department of Bio-logical Sciences, Bharathiar University, Tamil Nadu, India
| | - Dhananjay Yadav
- Department of Life Science, Yeungnam University, Gyeongsan, 38541, Korea
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3
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Deem JD, Phan BA, Ogimoto K, Cheng A, Bryan CL, Scarlett JM, Schwartz MW, Morton GJ. Warm Responsive Neurons in the Hypothalamic Preoptic Area are Potent Regulators of Glucose Homeostasis in Male Mice. Endocrinology 2023; 164:bqad074. [PMID: 37279930 PMCID: PMC10653198 DOI: 10.1210/endocr/bqad074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/02/2023] [Accepted: 06/05/2023] [Indexed: 06/08/2023]
Abstract
When mammals are exposed to a warm environment, overheating is prevented by activation of "warm-responsive" neurons (WRNs) in the hypothalamic preoptic area (POA) that reduce thermogenesis while promoting heat dissipation. Heat exposure also impairs glucose tolerance, but whether this also results from activation of POA WRNs is unknown. To address this question, we sought in the current work to determine if glucose intolerance induced by heat exposure can be attributed to activation of a specific subset of WRNs that express pituitary adenylate cyclase-activating peptide (ie, POAPacap neurons). We report that when mice are exposed to an ambient temperature sufficiently warm to activate POAPacap neurons, the expected reduction of energy expenditure is associated with glucose intolerance, and that these responses are recapitulated by chemogenetic POAPacap neuron activation. Because heat-induced glucose intolerance was not blocked by chemogenetic inhibition of POAPacap neurons, we conclude that POAPacap neuron activation is sufficient, but not required, to explain the impairment of glucose tolerance elicited by heat exposure.
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Affiliation(s)
- Jennifer D Deem
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
| | - Bao Anh Phan
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
| | - Kayoko Ogimoto
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
| | - Alice Cheng
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
| | - Caeley L Bryan
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
| | - Jarrad M Scarlett
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA 98145, USA
| | - Michael W Schwartz
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
| | - Gregory J Morton
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
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4
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Tu L, Fukuda M, Tong Q, Xu Y. The ventromedial hypothalamic nucleus: watchdog of whole-body glucose homeostasis. Cell Biosci 2022; 12:71. [PMID: 35619170 PMCID: PMC9134642 DOI: 10.1186/s13578-022-00799-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 04/25/2022] [Indexed: 02/06/2023] Open
Abstract
The brain, particularly the ventromedial hypothalamic nucleus (VMH), has been long known for its involvement in glucose sensing and whole-body glucose homeostasis. However, it is still not fully understood how the brain detects and responds to the changes in the circulating glucose levels, as well as brain-body coordinated control of glucose homeostasis. In this review, we address the growing evidence implicating the brain in glucose homeostasis, especially in the contexts of hypoglycemia and diabetes. In addition to neurons, we emphasize the potential roles played by non-neuronal cells, as well as extracellular matrix in the hypothalamus in whole-body glucose homeostasis. Further, we review the ionic mechanisms by which glucose-sensing neurons sense fluctuations of ambient glucose levels. We also introduce the significant implications of heterogeneous neurons in the VMH upon glucose sensing and whole-body glucose homeostasis, in which sex difference is also addressed. Meanwhile, research gaps have also been identified, which necessities further mechanistic studies in future.
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Affiliation(s)
- Longlong Tu
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, 1100 Bates Street #8066, Houston, TX, 77030, USA
| | - Makoto Fukuda
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, 1100 Bates Street #8066, Houston, TX, 77030, USA
| | - Qingchun Tong
- Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Yong Xu
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, 1100 Bates Street #8066, Houston, TX, 77030, USA.
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, 77030, USA.
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5
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Rosenbaum JL, Melhorn SJ, Schoen S, Webb MF, De Leon MRB, Humphreys M, Utzschneider KM, Schur EA. Evidence That Hypothalamic Gliosis Is Related to Impaired Glucose Homeostasis in Adults With Obesity. Diabetes Care 2022; 45:416-424. [PMID: 34848489 PMCID: PMC8914420 DOI: 10.2337/dc21-1535] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 11/03/2021] [Indexed: 02/03/2023]
Abstract
OBJECTIVE Preclinical research implicates hypothalamic glial cell responses in the pathogenesis of obesity and type 2 diabetes (T2D). In the current study we sought to translate such findings to humans by testing whether radiologic markers of gliosis in the mediobasal hypothalamus (MBH) were greater in individuals with obesity and impaired glucose homeostasis or T2D. RESEARCH DESIGN AND METHODS Using cross-sectional and prospective cohort study designs, we applied a validated quantitative MRI approach to assess gliosis in 67 adults with obesity and normal glucose tolerance, impaired glucose tolerance (IGT), or T2D. Assessments of glucose homeostasis were conducted via oral glucose tolerance tests (OGTT) and β-cell modeling. RESULTS We found significantly greater T2 relaxation times (a marker of gliosis by MRI), that were independent of adiposity, in the groups with IGT and T2D as compared with the group with normal glucose tolerance. Findings were present in the MBH, but not control regions. Moreover, positive linear associations were present in the MBH but not control regions between T2 relaxation time and glucose area under the curve during an OGTT, fasting glucose concentrations, hemoglobin A1c, and visceral adipose tissue mass, whereas negative linear relationships were present in the MBH for markers of insulin sensitivity and β-cell function. In a prospective cohort study, greater MBH T2 relaxation times predicted declining insulin sensitivity over 1 year. CONCLUSIONS Findings support a role for hypothalamic gliosis in the progression of insulin resistance in obesity and thus T2D pathogenesis in humans.
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Affiliation(s)
- Jennifer L Rosenbaum
- Division of Metabolism, Endocrinology and Nutrition, Department of Medicine, University of Washington, Seattle, WA
| | - Susan J Melhorn
- Division of General Internal Medicine, Department of Medicine, University of Washington, Seattle, WA.,UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Stefan Schoen
- University of Washington School of Medicine, Seattle, WA
| | - Mary F Webb
- Division of General Internal Medicine, Department of Medicine, University of Washington, Seattle, WA.,UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Mary Rosalynn B De Leon
- Division of General Internal Medicine, Department of Medicine, University of Washington, Seattle, WA.,UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Madelaine Humphreys
- Division of General Internal Medicine, Department of Medicine, University of Washington, Seattle, WA.,UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Kristina M Utzschneider
- Division of Metabolism, Endocrinology and Nutrition, Department of Medicine, University of Washington, Seattle, WA.,Research and Development, Department of Veterans Affairs, Seattle, WA
| | - Ellen A Schur
- Division of General Internal Medicine, Department of Medicine, University of Washington, Seattle, WA.,UW Medicine Diabetes Institute, University of Washington, Seattle, WA
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6
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Toward the Decipherment of Molecular Interactions in the Diabetic Brain. Biomedicines 2022; 10:biomedicines10010115. [PMID: 35052794 PMCID: PMC8773210 DOI: 10.3390/biomedicines10010115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/01/2022] [Accepted: 01/04/2022] [Indexed: 12/14/2022] Open
Abstract
Diabetes mellitus (DM) has been associated with cognitive complications in the brain resulting from acute and chronic metabolic disturbances happening peripherally and centrally. Numerous studies have reported on the morphological, electrophysiological, biochemical, and cognitive changes in the brains of diabetic individuals. The detailed pathophysiological mechanisms implicated in the development of the diabetic cognitive phenotype remain unclear due to intricate molecular changes evolving over time and space. This review provides an insight into recent advances in understanding molecular events in the diabetic brain, focusing on cerebral glucose and insulin uptake, insulin action in the brain, and the role of the brain in the regulation of glucose homeostasis. Fully competent mitochondria are essential for energy metabolism and proper brain function; hence, the potential contribution of mitochondria to the DM-induced impairment of the brain is also discussed.
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Doust YV, Sumargo N, Ziebell JM, Premilovac D. Insulin Resistance in the Brain: Evidence Supporting a Role for Inflammation, Reactive Microglia, and the Impact of Biological Sex. Neuroendocrinology 2022; 112:1027-1038. [PMID: 35279657 DOI: 10.1159/000524059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/02/2022] [Indexed: 11/19/2022]
Abstract
Increased intake of highly processed, energy-dense foods combined with a sedentary lifestyle are helping fuel the current overweight and obesity crisis, which is more prevalent in women than in men. Although peripheral organs such as adipose tissue contribute to the physiological development of obesity, emerging work aims to understand the role of the central nervous system to whole-body energy homeostasis and development of weight gain and obesity. The present review discusses the impact of insulin, insulin resistance, free fatty acids, and inflammation on brain function and how these differ between the males and females in the context of obesity. We highlight the potential of microglia, the resident immune cells in the brain, as mediators of neuronal insulin resistance that drive reduced satiety, increased food intake, and thus, obesity.
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Affiliation(s)
- Yasmine V Doust
- Wicking Dementia Research and Education Centre, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Nicole Sumargo
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Jenna M Ziebell
- Wicking Dementia Research and Education Centre, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Dino Premilovac
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia
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8
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Littlejohn EL, Boychuk CR. Protein Kinase C-Dependent Effects of Neurosteroids on Synaptic GABA A Receptor Inhibition Require the δ-Subunit. Front Physiol 2021; 12:742838. [PMID: 34759836 PMCID: PMC8573421 DOI: 10.3389/fphys.2021.742838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 08/25/2021] [Indexed: 11/13/2022] Open
Abstract
The dorsal motor nucleus of the vagus (DMV) contains preganglionic motor neurons important for interpreting sensory input from the periphery, integrating that information, and coding the appropriate parasympathetic (vagal) output to target organs. Despite the critical role of hormonal regulation of vagal motor output, few studies examine the role of neurosteroids in the regulation of the DMV. Of the few examinations, no studies have investigated the potential impact of allopregnanolone (Allo), a neuroactive progesterone-derivative, in the regulation of neurotransmission on the DMV. Since DMV neuronal function is tightly regulated by GABAA receptor activity and Allo is an endogenous GABAA receptor ligand, the present study used in vitro whole cell patch clamp to investigate whether Allo alters GABAergic neurotransmission to DMV neurons. Although Allo did not influence GABAergic neurotransmission during initial application (5-20 min), a TTX-insensitive prolongment of decay time and increase in frequency of GABAergic currents was established after Allo was removed from the bath for at least 30 min (LtAllo). Inhibition of protein kinase C (PKC) abolished these effects, suggesting that PKC is largely required to mediate Allo-induced inhibition of the DMV. Using mice that lack the δ-subunit of the GABAA receptor, we further confirmed that PKC-dependent activity of LtAllo required this subunit. Allo also potentiated GABAA receptor activity after a repeated application of δ-subunit agonist, suggesting that the presence of Allo encodes stronger δ-subunit-mediated inhibition over time. Using current clamp recording, we demonstrated that LtAllo-induced inhibition is sufficient to decrease action potential firing and excitability within DMV neurons. We conclude that the effects of LtAllo on GABAergic inhibition are dependent on δ-subunit and PKC activation. Taken together, DMV neurons can undergo long lasting Allo-dependent GABAA receptor plasticity.
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Affiliation(s)
| | - Carie R. Boychuk
- Department of Cellular and Integrative Physiology, Long College of Medicine, University of Texas Health San Antonio, San Antonio, TX, United States
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9
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Zhang W, Gao C, Qing Z, Zhang Z, Bi Y, Zeng W, Zhang B. Hippocampal subfields atrophy contribute more to cognitive impairment in middle-aged patients with type 2 diabetes rather than microvascular lesions. Acta Diabetol 2021; 58:1023-1033. [PMID: 33751221 DOI: 10.1007/s00592-020-01670-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 12/31/2020] [Indexed: 12/26/2022]
Abstract
AIMS Neurodegeneration and microvascular lesions are related to cognitive impairment in type 2 diabetes mellitus (T2DM). We aimed to use the volume of hippocampal subfields and the burden of white matter hyperintensities (WMH) as neurodegeneration and microangiopathy markers, respectively, to investigate their potential associations with cognitive impairment in T2DM patients. METHODS A total of 76 T2DM patients and 45 neurologically unimpaired normal controls were enrolled between February 2016 to August 2018. All participants underwent structural magnetic resonance imaging (MRI) and Montreal Cognitive Assessment (MoCA). The T2DM patients were divided into the T2DM without mild cognitive impairment (T2noMCI) group (n = 44) and the T2DM with mild cognitive impairment (T2MCI) group (n = 32) according to MoCA scores. We used automatic brain segmentation and quantitative technique to assess the volume of twelve hippocampal subfields and WMH on MRI. We used age, sex, education, and total intracranial volume as our covariates and the Bonferroni method for multiple comparison correction. RESULTS Both the T2MCI group and T2noMCI group showed significant hippocampal subfields atrophy compared to the controls, which were mainly in the left hippocampal tail, left CA1, bilateral molecular layer, bilateral dentate gyrus, and bilateral CA4 (all p < 0.0042). No significant differences in the volume of total WMH, deep-WMH, and periventricular-WMH were found among the three groups. The HbA1c levels were significantly negatively correlated with hippocampal atrophy, and the MoCA scores were positively correlated with bilateral hippocampal volume in T2DM patients and all samples. Mediation analyses demonstrated that the association of HbA1c levels with cognitive function was mediated by hippocampal subfields volume. CONCLUSION Widespread hippocampal atrophies across the subfields have been found in middle-aged T2DM patients, which was positively correlated with the MoCA scores and negatively correlated with the HbA1c levels. The association of HbA1c levels with cognitive function was mediated by some crucial hippocampal subfields volume. In middle-aged patients with T2DM, the neurodegeneration is more strongly associated with cognitive impairment than microvascular lesions. Trail Registeration This study was registered on Clinical-Trails.gov (NCT02738671).
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Affiliation(s)
- Wen Zhang
- Department of Radiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, No. 321 Zhongshan Rd, Nanjing, 210008, China
| | - Cailiang Gao
- Department of Radiology, Chongqing University Three Gorges Hospital, Chongqing, 404000, China
| | - Zhao Qing
- Department of Radiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, No. 321 Zhongshan Rd, Nanjing, 210008, China
| | - Zhou Zhang
- Department of Endocrinology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, No. 321 Zhongshan Rd, Nanjing, 210008, China
| | - Yan Bi
- Department of Endocrinology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, No. 321 Zhongshan Rd, Nanjing, 210008, China
| | - Wenbing Zeng
- Department of Radiology, Chongqing University Three Gorges Hospital, Chongqing, 404000, China.
| | - Bing Zhang
- Department of Radiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, No. 321 Zhongshan Rd, Nanjing, 210008, China.
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10
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Rivera-Mancilla E, Al-Hassany L, Villalón CM, MaassenVanDenBrink A. Metabolic Aspects of Migraine: Association With Obesity and Diabetes Mellitus. Front Neurol 2021; 12:686398. [PMID: 34177788 PMCID: PMC8219973 DOI: 10.3389/fneur.2021.686398] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/29/2021] [Indexed: 12/24/2022] Open
Abstract
Migraine is a disabling neurovascular disorder, characterized by moderate to severe unilateral headaches, nausea, photophobia, and/or phonophobia, with a higher prevalence in women than in men, which can drastically affect the quality of life of migraine patients. In addition, this chronic disorder is related with metabolic comorbidities associated with the patient's lifestyle, including obesity and diabetes mellitus (DM). Beyond the personal and socioeconomic impact caused by migraine, obesity and DM, it has been suggested that these metabolic disorders seem to be related to migraine since: (i) they are a risk factor for developing cardiovascular disorders or chronic diseases; (ii) they can be influenced by genetic and environmental risk factors; and (iii) while clinical and epidemiological studies suggest that obesity is a risk factor for migraine, DM (i.e., type 1 and type 2 DM) have been reported to be either a protective or a risk factor in migraine. On this basis, and given the high worldwide prevalence of migraine, obesity, and DM, this article provides a narrative review of the current literature related to the association between the etiology and pathophysiology of migraine and these metabolic disorders, considering lifestyle aspects, as well as the possible involvement of neurotransmitters, neuropeptides, and/or sex hormones. While a link between migraine and metabolic disorders has been suggested, many studies are contradictory and the mechanisms involved in this association are not yet sufficiently established. Therefore, further research should be focused on understanding the possible mechanisms involved.
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Affiliation(s)
- Eduardo Rivera-Mancilla
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Linda Al-Hassany
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, Netherlands
| | | | - Antoinette MaassenVanDenBrink
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, Netherlands
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11
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Myers MG, Affinati AH, Richardson N, Schwartz MW. Central nervous system regulation of organismal energy and glucose homeostasis. Nat Metab 2021; 3:737-750. [PMID: 34158655 DOI: 10.1038/s42255-021-00408-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/12/2021] [Indexed: 02/05/2023]
Abstract
Growing evidence implicates the brain in the regulation of both immediate fuel availability (for example, circulating glucose) and long-term energy stores (that is, adipose tissue mass). Rather than viewing the adipose tissue and glucose control systems separately, we suggest that the brain systems that control them are components of a larger, highly integrated, 'fuel homeostasis' control system. This conceptual framework, along with new insights into the organization and function of distinct neuronal systems, provides a context within which to understand how metabolic homeostasis is achieved in both basal and postprandial states. We also review evidence that dysfunction of the central fuel homeostasis system contributes to the close association between obesity and type 2 diabetes, with the goal of identifying more effective treatment options for these common metabolic disorders.
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Affiliation(s)
- Martin G Myers
- Departments of Medicine and Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Alison H Affinati
- Departments of Medicine and Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Nicole Richardson
- UW Medicine Diabetes Institute, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Michael W Schwartz
- UW Medicine Diabetes Institute, Department of Medicine, University of Washington, Seattle, WA, USA.
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12
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Sucquart IE, Nagarkar R, Edwards MC, Rodriguez Paris V, Aflatounian A, Bertoldo MJ, Campbell RE, Gilchrist RB, Begg DP, Handelsman DJ, Padmanabhan V, Anderson RA, Walters KA. Neurokinin 3 Receptor Antagonism Ameliorates Key Metabolic Features in a Hyperandrogenic PCOS Mouse Model. Endocrinology 2021; 162:6125280. [PMID: 33522579 DOI: 10.1210/endocr/bqab020] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Indexed: 02/06/2023]
Abstract
Polycystic ovary syndrome (PCOS) is a prevalent endocrine condition characterized by a range of endocrine, reproductive, and metabolic abnormalities. At present, management of women with PCOS is suboptimal as treatment is only symptomatic. Clinical and experimental advances in our understanding of PCOS etiology support a pivotal role for androgen neuroendocrine actions in PCOS pathogenesis. Hyperandrogenism is a key PCOS trait and androgen actions play a role in regulating the kisspeptin-/neurokinin B-/dynorphin (KNDy) system. This study aimed to investigate if targeted antagonism of neurokinin B signaling through the neurokinin 3 receptor (NK3R) would reverse PCOS traits in a dihydrotestosterone (DHT)-induced mouse model of PCOS. After 3 months, DHT exposure induced key reproductive PCOS traits of cycle irregularity and ovulatory dysfunction, and PCOS-like metabolic traits including increased body weight; white and brown fat pad weights; fasting serum triglyceride and glucose levels, and blood glucose incremental area under the curve. Treatment with a NK3R antagonist (MLE4901) did not impact the observed reproductive defects. In contrast, following NK3R antagonist treatment, PCOS-like females displayed decreased total body weight, adiposity, and adipocyte hypertrophy, but increased respiratory exchange ratio, suggesting NK3R antagonism altered the metabolic status of the PCOS-like females. NK3R antagonism did not improve circulating serum triglyceride or fasted glucose levels. Collectively, these findings demonstrate that NK3R antagonism may be beneficial in the treatment of adverse metabolic features associated with PCOS and support neuroendocrine targeting in the development of novel therapeutic strategies for PCOS.
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Affiliation(s)
- Irene E Sucquart
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Ruchi Nagarkar
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Melissa C Edwards
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Valentina Rodriguez Paris
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Ali Aflatounian
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Michael J Bertoldo
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Rebecca E Campbell
- Centre of Neuroendocrinology and Department of Physiology, School of Biomedical Sciences, University of Otago, Dunedin 9054, New Zealand
| | - Robert B Gilchrist
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Denovan P Begg
- Department of Behavioural Neuroscience, School of Psychology, University of New South Wales, Sydney, NSW 2052, Australia
| | - David J Handelsman
- Andrology Laboratory, ANZAC Research Institute, University of Sydney, Concord Hospital, NSW 2139, Australia
| | | | - Richard A Anderson
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Kirsty A Walters
- Fertility and Research Centre, School of Women's & Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
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13
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Lundqvist MH, Almby K, Wiklund U, Abrahamsson N, Kamble PG, Pereira MJ, Eriksson JW. Altered hormonal and autonomic nerve responses to hypo- and hyperglycaemia are found in overweight and insulin-resistant individuals and may contribute to the development of type 2 diabetes. Diabetologia 2021; 64:641-655. [PMID: 33241460 PMCID: PMC7864814 DOI: 10.1007/s00125-020-05332-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 10/01/2020] [Indexed: 12/27/2022]
Abstract
AIMS/HYPOTHESIS Results from animal models and some clinical work suggest a role for the central nervous system (CNS) in glucose regulation and type 2 diabetes pathogenesis by modulation of glucoregulatory hormones and the autonomic nervous system (ANS). The aim of this study was to characterise the neuroendocrine response to various glucose concentrations in overweight and insulin-resistant individuals compared with lean individuals. METHODS Overweight/obese (HI, n = 15, BMI ≥27.0 kg/m2) and lean (LO, n = 15, BMI <27.0 kg/m2) individuals without diabetes underwent hyperinsulinaemic euglycaemic-hypoglycaemic clamps and hyperglycaemic clamps on two separate occasions with measurements of hormones, Edinburgh Hypoglycaemic Symptom Scale (ESS) score and heart rate variability (HRV). Statistical methods included groupwise comparisons with Mann-Whitney U tests, multilinear regressions and linear mixed models between neuroendocrine responses and continuous metabolic variables. RESULTS During hypoglycaemic clamps, there was an elevated cortisol response in HI vs LO (median ΔAUC 12,383 vs 4793 nmol/l × min; p = 0.050) and a significantly elevated adrenocorticotropic hormone (ACTH) response in HI vs LO (median ΔAUC 437.3 vs 162.0 nmol/l × min; p = 0.021). When adjusting for clamp glucose levels, obesity (p = 0.033) and insulin resistance (p = 0.009) were associated with elevated glucagon levels. By contrast, parasympathetic activity was less suppressed in overweight individuals at the last stage of hypoglycaemia compared with euglycaemia (high-frequency power of HRV, p = 0.024). M value was the strongest predictor for the ACTH and PHF responses, independent of BMI and other variables. There was a BMI-independent association between the cortisol response and ESS score response (p = 0.024). During hyperglycaemic clamps, overweight individuals displayed less suppression of glucagon levels (median ΔAUC -63.4% vs -73.0%; p = 0.010) and more suppression of sympathetic relative to parasympathetic activity (low-frequency/high-frequency power, p = 0.011). CONCLUSIONS/INTERPRETATION This study supports the hypothesis that altered responses of insulin-antagonistic hormones and the ANS to glucose fluctuations occur in overweight and insulin-resistant individuals, and that these responses are probably partly mediated by the CNS. Their potential role in development of type 2 diabetes needs to be addressed in future research. Graphical abstract.
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Affiliation(s)
| | - Kristina Almby
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Urban Wiklund
- Department of Radiation Sciences, Biomedical Engineering, Umeå University, Umeå, Sweden
| | | | - Prasad G Kamble
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Maria J Pereira
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Jan W Eriksson
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden.
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14
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Heiskanen MA, Honkala SM, Hentilä J, Ojala R, Lautamäki R, Koskensalo K, Lietzén MS, Saunavaara V, Saunavaara J, Helmiö M, Löyttyniemi E, Nummenmaa L, Collado MC, Malm T, Lahti L, Pietiläinen KH, Kaprio J, Rinne JO, Hannukainen JC. Systemic cross-talk between brain, gut, and peripheral tissues in glucose homeostasis: effects of exercise training (CROSSYS). Exercise training intervention in monozygotic twins discordant for body weight. BMC Sports Sci Med Rehabil 2021; 13:16. [PMID: 33627179 PMCID: PMC7905681 DOI: 10.1186/s13102-021-00241-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 02/03/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND Obesity and physical inactivity are major global public health concerns, both of which increase the risk of insulin resistance and type 2 diabetes. Regulation of glucose homeostasis involves cross-talk between the central nervous system, peripheral tissues, and gut microbiota, and is affected by genetics. Systemic cross-talk between brain, gut, and peripheral tissues in glucose homeostasis: effects of exercise training (CROSSYS) aims to gain new systems-level understanding of the central metabolism in human body, and how exercise training affects this cross-talk. METHODS CROSSYS is an exercise training intervention, in which participants are monozygotic twins from pairs discordant for body mass index (BMI) and within a pair at least the other is overweight. Twins are recruited from three population-based longitudinal Finnish twin studies, including twins born in 1983-1987, 1975-1979, and 1945-1958. The participants undergo 6-month-long exercise intervention period, exercising four times a week (including endurance, strength, and high-intensity training). Before and after the exercise intervention, comprehensive measurements are performed in Turku PET Centre, Turku, Finland. The measurements include: two positron emission tomography studies (insulin-stimulated whole-body and tissue-specific glucose uptake and neuroinflammation), magnetic resonance imaging (brain morphology and function, quantification of body fat masses and organ volumes), magnetic resonance spectroscopy (quantification of fat within heart, pancreas, liver and tibialis anterior muscle), echocardiography, skeletal muscle and adipose tissue biopsies, a neuropsychological test battery as well as biosamples from blood, urine and stool. The participants also perform a maximal exercise capacity test and tests of muscular strength. DISCUSSION This study addresses the major public health problems related to modern lifestyle, obesity, and physical inactivity. An eminent strength of this project is the possibility to study monozygotic twin pairs that share the genome at the sequence level but are discordant for BMI that is a risk factor for metabolic impairments such as insulin resistance. Thus, this exercise training intervention elucidates the effects of obesity on metabolism and whether regular exercise training is able to reverse obesity-related impairments in metabolism in the absence of the confounding effects of genetic factors. TRIAL REGISTRATION ClinicalTrials.gov , NCT03730610 . Prospectively registered 5 November 2018.
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Affiliation(s)
- Marja A Heiskanen
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
| | - Sanna M Honkala
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
| | - Jaakko Hentilä
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
| | - Ronja Ojala
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
| | | | - Kalle Koskensalo
- Department of Medical Physics, Turku University Hospital, Turku, Finland
| | - Martin S Lietzén
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
| | - Virva Saunavaara
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
- Department of Medical Physics, Turku University Hospital, Turku, Finland
| | - Jani Saunavaara
- Department of Medical Physics, Turku University Hospital, Turku, Finland
| | - Mika Helmiö
- Division of Digestive Surgery and Urology, Turku University Hospital, Turku, Finland
| | | | - Lauri Nummenmaa
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
- Department of Psychology, University of Turku, Turku, Finland
| | - Maria C Collado
- Institute of Agrochemistry and Food Technology-National Research Council (IATA-CSIC), Valencia, Spain
- Functional Food Forum, University of Turku, Turku, Finland
| | - Tarja Malm
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Leo Lahti
- Department of Future Technologies, University of Turku, Turku, Finland
| | - Kirsi H Pietiläinen
- Obesity Research Unit, Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Abdominal Center, Obesity Center, Endocrinology, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Jaakko Kaprio
- Institute for Molecular Medicine Finland FIMM, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Juha O Rinne
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Jarna C Hannukainen
- Turku PET Centre, University of Turku, P.O. Box 52, FIN-20521, Turku, Finland.
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15
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A multidimensional functional fitness score has a stronger association with type 2 diabetes than obesity parameters in cross sectional data. PLoS One 2021; 16:e0245093. [PMID: 33544739 PMCID: PMC7864668 DOI: 10.1371/journal.pone.0245093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 12/22/2020] [Indexed: 11/19/2022] Open
Abstract
Objectives We examine here the association of multidimensional functional fitness with type 2 diabetes mellitus (T2DM) as compared to anthropometric indices of obesity such as body mass index (BMI) and waist to hip ratio (WHR) in a sample of Indian population. Research design and method We analysed retrospective data of 663 volunteer participants (285 males and 378 females between age 28 and 84), from an exercise clinic in which every participant was required to undergo a health related physical fitness (HRPF) assessment consisting of 15 different tasks examining 8 different aspects of functional fitness. Results The odds of being diabetic in the highest quartile of BMI were not significantly higher than that in the lowest quartile in either of the sexes. The odds of being a diabetic in the highest WHR quartile were significantly greater than the lowest quartile in females (OR = 4.54 (1.95, 10.61) as well as in males (OR = 3.81 (1.75, 8.3). In both sexes the odds of being a diabetic were significantly greater in the lowest quartile of HRPF score than the highest (males OR = 10.52 (4.21, 26.13); females OR = 10.50 (3.53, 31.35)). After removing confounding, the predictive power of HRPF was significantly greater than that of WHR. HRPF was negatively correlated with WHR, however for individuals that had contradicting HRPF and WHR based predictions, HRPF was the stronger predictor of T2DM. Conclusion The association of multidimensional functional fitness score with type 2 diabetes was significantly stronger than obesity parameters in a cross sectional self-selected sample from an Indian city.
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16
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MacDonald AJ, Yang YHC, Cruz AM, Beall C, Ellacott KLJ. Brain-Body Control of Glucose Homeostasis-Insights From Model Organisms. Front Endocrinol (Lausanne) 2021; 12:662769. [PMID: 33868184 PMCID: PMC8044781 DOI: 10.3389/fendo.2021.662769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/12/2021] [Indexed: 12/15/2022] Open
Abstract
Tight regulation of blood glucose is essential for long term health. Blood glucose levels are defended by the correct function of, and communication between, internal organs including the gastrointestinal tract, pancreas, liver, and brain. Critically, the brain is sensitive to acute changes in blood glucose level and can modulate peripheral processes to defend against these deviations. In this mini-review we highlight select key findings showcasing the utility, strengths, and limitations of model organisms to study brain-body interactions that sense and control blood glucose levels. First, we discuss the large platform of genetic tools available to investigators studying mice and how this field may yet reveal new modes of communication between peripheral organs and the brain. Second, we discuss how rats, by virtue of their size, have unique advantages for the study of CNS control of glucose homeostasis and note that they may more closely model some aspects of human (patho)physiology. Third, we discuss the nascent field of studying the CNS control of blood glucose in the zebrafish which permits ease of genetic modification, large-scale measurements of neural activity and live imaging in addition to high-throughput screening. Finally, we briefly discuss glucose homeostasis in drosophila, which have a distinct physiology and glucoregulatory systems to vertebrates.
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17
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Abstract
Energy balance is centrally regulated by the brain through several interacting neuronal systems involving external, peripheral, and central factors within the brain. The hypothalamus integrates these factors and is the key brain area in the regulation of energy balance. In this review, we will explain the structure of the hypothalamus and its role in the regulation of energy balance. An important part of energy balance regulation is the sensing of nutrient status and availability. This review will focus on the sensing of the two main sources of energy by the hypothalamus: glucose and fat. As many common health problems and chronic diseases can be traced back to a disrupted hypothalamic function, we will also discuss hypothalamic sensing of glucose and fats in these pathologies. Finally, we will summarize the current knowledge and discuss how this may be applied clinically and for future research perspectives.
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18
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Dodd GT, Xirouchaki CE, Eramo M, Mitchell CA, Andrews ZB, Henry BA, Cowley MA, Tiganis T. Intranasal Targeting of Hypothalamic PTP1B and TCPTP Reinstates Leptin and Insulin Sensitivity and Promotes Weight Loss in Obesity. Cell Rep 2020; 28:2905-2922.e5. [PMID: 31509751 DOI: 10.1016/j.celrep.2019.08.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 06/29/2019] [Accepted: 08/02/2019] [Indexed: 12/11/2022] Open
Abstract
The importance of hypothalamic leptin and insulin resistance in the development and maintenance of obesity remains unclear. The tyrosine phosphatases protein tyrosine phosphatase 1B (PTP1B) and T cell protein tyrosine phosphatase (TCPTP) attenuate leptin and insulin signaling and are elevated in the hypothalami of obese mice. We report that elevated PTP1B and TCPTP antagonize hypothalamic leptin and insulin signaling and contribute to the maintenance of obesity. Deletion of PTP1B and TCPTP in the hypothalami of obese mice enhances CNS leptin and insulin sensitivity, represses feeding, and increases browning, to decrease adiposity and improve glucose metabolism. The daily intranasal administration of a PTP1B inhibitor, plus the glucocorticoid antagonist RU486 that decreases TCPTP expression, represses feeding, increases browning, promotes weight loss, and improves glucose metabolism in obese mice. Our findings causally link heightened hypothalamic PTP1B and TCPTP with leptin and insulin resistance and the maintenance of obesity and define a viable pharmacological approach by which to promote weight loss in obesity.
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Affiliation(s)
- Garron T Dodd
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Chrysovalantou E Xirouchaki
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Matthew Eramo
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Christina A Mitchell
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Zane B Andrews
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Physiology, Monash University, VIC 3800, Australia
| | - Belinda A Henry
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Physiology, Monash University, VIC 3800, Australia
| | - Michael A Cowley
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Physiology, Monash University, VIC 3800, Australia
| | - Tony Tiganis
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Monash Metabolic Phenotyping Facility, Monash University, VIC, Australia; Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia.
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19
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Bentsen MA, Rausch DM, Mirzadeh Z, Muta K, Scarlett JM, Brown JM, Herranz-Pérez V, Baquero AF, Thompson J, Alonge KM, Faber CL, Kaiyala KJ, Bennett C, Pyke C, Ratner C, Egerod KL, Holst B, Meek TH, Kutlu B, Zhang Y, Sparso T, Grove KL, Morton GJ, Kornum BR, García-Verdugo JM, Secher A, Jorgensen R, Schwartz MW, Pers TH. Transcriptomic analysis links diverse hypothalamic cell types to fibroblast growth factor 1-induced sustained diabetes remission. Nat Commun 2020; 11:4458. [PMID: 32895383 PMCID: PMC7477234 DOI: 10.1038/s41467-020-17720-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 07/15/2020] [Indexed: 12/26/2022] Open
Abstract
In rodent models of type 2 diabetes (T2D), sustained remission of hyperglycemia can be induced by a single intracerebroventricular (icv) injection of fibroblast growth factor 1 (FGF1), and the mediobasal hypothalamus (MBH) was recently implicated as the brain area responsible for this effect. To better understand the cellular response to FGF1 in the MBH, we sequenced >79,000 single-cell transcriptomes from the hypothalamus of diabetic Lepob/ob mice obtained on Days 1 and 5 after icv injection of either FGF1 or vehicle. A wide range of transcriptional responses to FGF1 was observed across diverse hypothalamic cell types, with glial cell types responding much more robustly than neurons at both time points. Tanycytes and ependymal cells were the most FGF1-responsive cell type at Day 1, but astrocytes and oligodendrocyte lineage cells subsequently became more responsive. Based on histochemical and ultrastructural evidence of enhanced cell-cell interactions between astrocytes and Agrp neurons (key components of the melanocortin system), we performed a series of studies showing that intact melanocortin signaling is required for the sustained antidiabetic action of FGF1. These data collectively suggest that hypothalamic glial cells are leading targets for the effects of FGF1 and that sustained diabetes remission is dependent on intact melanocortin signaling.
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MESH Headings
- Agouti-Related Protein/metabolism
- Animals
- Astrocytes/drug effects
- Astrocytes/metabolism
- Blood Glucose/analysis
- Cell Communication
- Cell Nucleus/drug effects
- Cell Nucleus/metabolism
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/diet therapy
- Diabetes Mellitus, Experimental/etiology
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/etiology
- Diabetes Mellitus, Type 2/pathology
- Diet, High-Fat/adverse effects
- Dietary Sucrose/administration & dosage
- Dietary Sucrose/adverse effects
- Fibroblast Growth Factor 1/administration & dosage
- Humans
- Hypoglycemic Agents/administration & dosage
- Hypothalamus/cytology
- Hypothalamus/drug effects
- Hypothalamus/pathology
- Injections, Intraventricular
- Leptin/genetics
- Male
- Melanocortins/metabolism
- Melanocyte-Stimulating Hormones/administration & dosage
- Mice
- Mice, Knockout
- Neurons/drug effects
- Neurons/metabolism
- Oligodendroglia/drug effects
- Oligodendroglia/metabolism
- RNA-Seq
- Receptor, Melanocortin, Type 4/genetics
- Receptors, Melanocortin/antagonists & inhibitors
- Receptors, Melanocortin/metabolism
- Recombinant Proteins/administration & dosage
- Remission Induction/methods
- Signal Transduction/drug effects
- Single-Cell Analysis
- Stereotaxic Techniques
- Transcriptome/drug effects
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Affiliation(s)
- Marie A Bentsen
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Dylan M Rausch
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Kenjiro Muta
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA
- Chakri Naruebodindra Medical Institute, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Jarrad M Scarlett
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA
| | - Jenny M Brown
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA
| | - Vicente Herranz-Pérez
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
- Predepartamental Unit of Medicine, Jaume I University, Castelló de la Plana, Spain
| | - Arian F Baquero
- Obesity Research Unit, Novo Nordisk Research Center Seattle, Inc., Seattle, WA, USA
| | - Jonatan Thompson
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kimberly M Alonge
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA
| | - Chelsea L Faber
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA
| | - Karl J Kaiyala
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, USA
| | - Camdin Bennett
- Obesity Research Unit, Novo Nordisk Research Center Seattle, Inc., Seattle, WA, USA
| | - Charles Pyke
- Pathology & Imaging, Global Discovery and Development Sciences, Novo Nordisk A/S, Maaloev, Denmark
| | - Cecilia Ratner
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kristoffer L Egerod
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Birgitte Holst
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Thomas H Meek
- Obesity Research Unit, Novo Nordisk Research Center Seattle, Inc., Seattle, WA, USA
| | - Burak Kutlu
- Obesity Research Unit, Novo Nordisk Research Center Seattle, Inc., Seattle, WA, USA
| | - Yu Zhang
- Obesity Research Unit, Novo Nordisk Research Center Seattle, Inc., Seattle, WA, USA
| | - Thomas Sparso
- Bioinformatics and Data Mining, Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
| | - Kevin L Grove
- Obesity Research Unit, Novo Nordisk Research Center Seattle, Inc., Seattle, WA, USA
| | - Gregory J Morton
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA
| | - Birgitte R Kornum
- Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | | | - Anna Secher
- Diabetes Research, Global Drug Discovery, Novo Nordisk A/S, Maaloev, Denmark
| | - Rasmus Jorgensen
- Diabetes Research, Global Drug Discovery, Novo Nordisk A/S, Maaloev, Denmark
- Cytoki Pharma, Copenhagen, Denmark
| | - Michael W Schwartz
- UW Medicine Diabetes Institute, University of Washington, Seattle, WA, USA.
| | - Tune H Pers
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
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20
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Raitiere MN. Does photoperiodism involve a seasonal and non-pathological Warburg effect? Med Hypotheses 2020; 135:109447. [DOI: 10.1016/j.mehy.2019.109447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 10/20/2019] [Indexed: 12/15/2022]
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21
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Brown JM, Scarlett JM, Matsen ME, Nguyen HT, Secher A, Jorgensen R, Morton GJ, Schwartz MW. The Hypothalamic Arcuate Nucleus-Median Eminence Is a Target for Sustained Diabetes Remission Induced by Fibroblast Growth Factor 1. Diabetes 2019; 68:1054-1061. [PMID: 30796029 PMCID: PMC6477902 DOI: 10.2337/db19-0025] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 02/14/2019] [Indexed: 12/13/2022]
Abstract
In rodent models of type 2 diabetes (T2D), sustained remission of diabetic hyperglycemia can be induced by a single intracerebroventricular (icv) injection of fibroblast growth factor 1 (FGF1). To identify the brain areas responsible for this effect, we first used immunohistochemistry to map the hypothalamic distribution of phosphorylated extracellular signal-related kinase 1/2 (pERK1/2), a marker of mitogen-activated protein kinase-ERK signal transduction downstream of FGF receptor activation. Twenty minutes after icv FGF1 injection in adult male Wistar rats, pERK1/2 staining was detected primarily in two hypothalamic areas: the arcuate nucleus-median eminence (ARC-ME) and the paraventricular nucleus (PVN). To determine whether an action of FGF1 localized to either the ARC-ME or the PVN is capable of mimicking the sustained antidiabetic effect elicited by icv FGF1, we microinjected either saline vehicle or a low dose of FGF1 (0.3 µg/side) bilaterally into either the ARC-ME area or PVN of Zucker Diabetic Fatty rats, a model of T2D, and monitored daily food intake, body weight, and blood glucose levels over a 3-week period. Whereas bilateral intra-arcuate microinjection of saline vehicle was without effect, remission of hyperglycemia lasting >3 weeks was observed following bilateral microinjection of FGF1 into the ARC-ME. This antidiabetic effect cannot be attributed to leakage of FGF1 into cerebrospinal fluid and subsequent action on other brain areas, since icv injection of the same total dose was without effect. Combined with our finding that bilateral microinjection of the same dose of FGF1 into the PVN was without effect on glycemia or other parameters, we conclude that the ARC-ME area (but not the PVN) is a target for sustained remission of diabetic hyperglycemia induced by FGF1.
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Affiliation(s)
- Jenny M Brown
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Jarrad M Scarlett
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA
- Department of Pediatric Gastroenterology and Hepatology, University of Washington, Seattle, WA
| | - Miles E Matsen
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Hong T Nguyen
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Anna Secher
- Diabetes Research, Global Drug Discovery, Novo Nordisk, Måløv, Denmark
| | - Rasmus Jorgensen
- Diabetes Research, Global Drug Discovery, Novo Nordisk, Måløv, Denmark
| | - Gregory J Morton
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA
| | - Michael W Schwartz
- Department of Medicine, UW Medicine Diabetes Institute, University of Washington, Seattle, WA
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22
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Ladyman SR. Anticipating Future Demands: Hormone-Induced Transcriptional Programming in the Maternal Pancreas During Pregnancy. Endocrinology 2019; 160:1164-1165. [PMID: 30946462 DOI: 10.1210/en.2019-00243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 03/27/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Sharon R Ladyman
- Centre for Neuroendocrinology and Department of Anatomy, School of Medical Sciences, University of Otago, Dunedin, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, Auckland, New Zealand
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23
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Lundqvist MH, Almby K, Abrahamsson N, Eriksson JW. Is the Brain a Key Player in Glucose Regulation and Development of Type 2 Diabetes? Front Physiol 2019; 10:457. [PMID: 31133864 PMCID: PMC6524713 DOI: 10.3389/fphys.2019.00457] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 04/01/2019] [Indexed: 01/08/2023] Open
Abstract
Ever since Claude Bernards discovery in the mid 19th-century that a lesion in the floor of the third ventricle in dogs led to altered systemic glucose levels, a role of the CNS in whole-body glucose regulation has been acknowledged. However, this finding was later overshadowed by the isolation of pancreatic hormones in the 20th century. Since then, the understanding of glucose homeostasis and pathology has primarily evolved around peripheral mechanism. Due to scientific advances over these last few decades, however, increasing attention has been given to the possibility of the brain as a key player in glucose regulation and the pathogenesis of metabolic disorders such as type 2 diabetes. Studies of animals have enabled detailed neuroanatomical mapping of CNS structures involved in glucose regulation and key neuronal circuits and intracellular pathways have been identified. Furthermore, the development of neuroimaging techniques has provided methods to measure changes of activity in specific CNS regions upon diverse metabolic challenges in humans. In this narrative review, we discuss the available evidence on the topic. We conclude that there is much evidence in favor of active CNS involvement in glucose homeostasis but the relative importance of central vs. peripheral mechanisms remains to be elucidated. An increased understanding of this field may lead to new CNS-focusing pharmacologic strategies in the treatment of type 2 diabetes.
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Affiliation(s)
| | - Kristina Almby
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | | | - Jan W Eriksson
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
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24
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Hypoglycemia-activated Hypothalamic Microglia Impairs Glucose Counterregulatory Responses. Sci Rep 2019; 9:6224. [PMID: 30996341 PMCID: PMC6470310 DOI: 10.1038/s41598-019-42728-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 04/05/2019] [Indexed: 12/11/2022] Open
Abstract
Glucose is a major fuel for the central nervous system and hypoglycemia is a significant homeostatic stressor, which elicits counterregulatory reactions. Hypothalamic metabolic- and stress-related neurons initiate these actions, however recruitment of glia in control such adaptive circuit remain unknown. Groups of fed- and fasted-, vehicle-injected, and fasted + insulin-injected male mice were compared in this study. Bolus insulin administration to fasted mice resulted in hypoglycemia, which increased hypothalamo-pituitary-adrenal (HPA) axis- and sympathetic activity, increased transcription of neuropeptide Y (Npy) and agouti-related peptide (Agrp) in the hypothalamic arcuate nucleus and activated IBA1+ microglia in the hypothalamus. Activated microglia were found in close apposition to hypoglycemia-responsive NPY neurons. Inhibition of microglia by minocycline increased counterregulatory sympathetic response to hypoglycemia. Fractalkine-CX3CR1 signaling plays a role in control of microglia during hypoglycemia, because density and solidity of IBA1-ir profiles was attenuated in fasted, insulin-treated, CX3CR1 KO mice, which was parallel with exaggerated neuropeptide responses and higher blood glucose levels following insulin administration. Hypoglycemia increased Il-1b expression in the arcuate nucleus, while IL-1a/b knockout mice display improved glycemic control to insulin administration. In conclusion, activated microglia in the arcuate nucleus interferes with central counterregulatory responses to hypoglycemia. These results underscore involvement of microglia in hypothalamic regulation of glucose homeostasis.
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25
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A hindbrain inhibitory microcircuit mediates vagally-coordinated glucose regulation. Sci Rep 2019; 9:2722. [PMID: 30804396 PMCID: PMC6389891 DOI: 10.1038/s41598-019-39490-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 12/14/2018] [Indexed: 02/07/2023] Open
Abstract
Neurons in the brainstem dorsal vagal complex integrate neural and humoral signals to coordinate autonomic output to viscera that regulate a variety of physiological functions, but how this circuitry regulates metabolism is murky. We tested the hypothesis that premotor, GABAergic neurons in the nucleus tractus solitarius (NTS) form a hindbrain micro-circuit with preganglionic parasympathetic motorneurons of the dorsal motor nucleus of the vagus (DMV) that is capable of modulating systemic blood glucose concentration. In vitro, neuronal activation or inhibition using either excitatory or inhibitory designer receptor exclusively activated by designer drugs (DREADDs) constructs expressed in GABAergic NTS neurons increased or decreased, respectively, action potential firing of GABAergic NTS neurons and downstream synaptic inhibition of the DMV. In vivo, DREADD-mediated activation of GABAergic NTS neurons increased systemic blood glucose concentration, whereas DREADD-mediated silencing of these neurons was without effect. The DREADD-induced hyperglycemia was abolished by blocking peripheral muscarinic receptors, consistent with the hypothesis that altered parasympathetic drive mediated the response. This effect was paralleled by elevated serum glucagon and hepatic phosphoenolpyruvate carboxykinase 1 (PEPCK1) expression, without affecting insulin levels or muscle metabolism. Activity in a hindbrain inhibitory microcircuit is sufficient to modulate systemic glucose concentration, independent of insulin secretion or utilization.
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26
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Mirzadeh Z, Alonge KM, Cabrales E, Herranz-Pérez V, Scarlett JM, Brown JM, Hassouna R, Matsen ME, Nguyen HT, Garcia-Verdugo JM, Zeltser LM, Schwartz MW. Perineuronal Net Formation during the Critical Period for Neuronal Maturation in the Hypothalamic Arcuate Nucleus. Nat Metab 2019; 1:212-221. [PMID: 31245789 PMCID: PMC6594569 DOI: 10.1038/s42255-018-0029-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In leptin-deficient ob/ob mice, obesity and diabetes are associated with abnormal development of neurocircuits in the hypothalamic arcuate nucleus (ARC)1, a critical brain area for energy and glucose homeostasis2,3. As this developmental defect can be remedied by systemic leptin administration, but only if given before postnatal day 28, a critical period (CP) for leptin-dependent development of ARC neurocircuits has been proposed4. In other brain areas, CP closure coincides with the appearance of perineuronal nets (PNNs), extracellular matrix specializations that restrict the plasticity of neurons that they enmesh5. Here we report that in humans as well as rodents, subsets of neurons in the mediobasal aspect of the ARC are enmeshed by PNN-like structures. In mice, these neurons are densely-packed into a continuous ring that encircles the junction of the ARC and median eminence, which facilitates exposure of ARC neurons to the circulation. Most of the enmeshed neurons are both GABAergic and leptin receptor-positive, including a majority of Agrp neurons. Postnatal formation of the PNN-like structures coincides precisely with closure of the CP for Agrp neuron maturation and is dependent on input from circulating leptin, as postnatal ob/ob mice have reduced ARC PNN-like material that is restored by leptin administration during the CP. We conclude that neurons crucial to metabolic homeostasis are enmeshed by PNN-like structures and organized into a densely packed cluster situated circumferentially at the ARC-ME junction, where metabolically-relevant humoral signals are sensed.
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Affiliation(s)
- Zaman Mirzadeh
- Department of Neurosurgery, Barrow Neurological Institute, Phoenix, AZ, USA.
| | - Kimberly M Alonge
- University of Washington Medicine Diabetes Institute, School of Medicine, University of Washington, Seattle, WA, USA
| | - Elaine Cabrales
- Department of Neurosurgery, Barrow Neurological Institute, Phoenix, AZ, USA
| | - Vicente Herranz-Pérez
- Laboratory of Comparative Neurobiology, Instituto Cavanilles, CIBERNED, Universidad de Valencia, Valencia, Spain
- Predepartmental Unit of Medicine, Faculty of Health Sciences, Universitat Jaume I, Castellón de la Plana, Spain
| | - Jarrad M Scarlett
- University of Washington Medicine Diabetes Institute, School of Medicine, University of Washington, Seattle, WA, USA
- Department of Pediatric Gastroenterology and Hepatology, Seattle Children's Hospital, Seattle, WA, USA
| | - Jenny M Brown
- University of Washington Medicine Diabetes Institute, School of Medicine, University of Washington, Seattle, WA, USA
| | - Rim Hassouna
- Naomi Berrie Diabetes Center, Columbia University Medical Center, New York, NY, USA
| | - Miles E Matsen
- University of Washington Medicine Diabetes Institute, School of Medicine, University of Washington, Seattle, WA, USA
| | - Hong T Nguyen
- University of Washington Medicine Diabetes Institute, School of Medicine, University of Washington, Seattle, WA, USA
| | - Jose Manuel Garcia-Verdugo
- Laboratory of Comparative Neurobiology, Instituto Cavanilles, CIBERNED, Universidad de Valencia, Valencia, Spain
| | - Lori M Zeltser
- Naomi Berrie Diabetes Center, Columbia University Medical Center, New York, NY, USA
- Department of Pathology and Cell Biology, Columbia University, New York, NY, USA
| | - Michael W Schwartz
- University of Washington Medicine Diabetes Institute, School of Medicine, University of Washington, Seattle, WA, USA.
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27
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Abstract
Glucose-sensitive neurons have long been implicated in glucose homeostasis, but how glucose-sensing information is used by the brain in this process remains uncertain. Here, we propose a model in which (1) information relevant to the circulating glucose level is essential to the proper function of this regulatory system, (2) this input is provided by neurons located outside the blood-brain barrier (BBB) (since neurons situated behind the BBB are exposed to glucose in brain interstitial fluid, rather than that in the circulation), and (3) while the efferent limb of this system is comprised of neurons situated behind the BBB, many of these neurons are also glucose sensitive. Precedent for such an organizational scheme is found in the thermoregulatory system, which we draw upon in this framework for understanding the role played by brain glucose sensing in glucose homeostasis.
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Affiliation(s)
- Marie Aare Bentsen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Science, University of Copenhagen, Blegdamsvej 3B, Building 7 (Maersk Tower), Copenhagen N 2200, Denmark; University of Washington Medicine Diabetes Institute, Department of Medicine, University of Washington at South Lake Union, 750 Republican St, F704, Box 358062, Seattle, WA 98109, USA
| | - Zaman Mirzadeh
- Department of Neurological Surgery, Barrow Neurological Institute, 350 West Thomas Road, Phoenix, AZ 85013, USA
| | - Michael W Schwartz
- University of Washington Medicine Diabetes Institute, Department of Medicine, University of Washington at South Lake Union, 750 Republican St, F704, Box 358062, Seattle, WA 98109, USA.
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28
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Zheng X, Bi W, Yang G, Zhao J, Wang J, Li X, Zhou X. Hyperglycemia Induced by Chronic Restraint Stress in Mice Is Associated With Nucleus Tractus Solitarius Injury and Not Just the Direct Effect of Glucocorticoids. Front Neurosci 2018; 12:983. [PMID: 30618599 PMCID: PMC6305899 DOI: 10.3389/fnins.2018.00983] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 12/07/2018] [Indexed: 12/20/2022] Open
Abstract
Chronic restraint stress (CRS) can affect hypothalamic-pituitary-adrenal (HPA) axis activity and increase glucocorticoid levels. Glucocorticoids are stress hormones that regulate multiple aspects of energy homeostasis. Stress also impairs glucose tolerance. The aim of this study was to investigate the cause of insulin-resistant hyperglycemia during CRS. We produced the CRS models (a 7-day restraint followed by a 3-day free moving procedure, total of 4 cycles for 40 days) in mice, detected the parameters related to glucose metabolism, and compared them to those of the dexamethasone (DEX) injection (0.2 mg/kg i.p., also a 4 cycle procedure as the CRS). The results showed that the CRS induced a moderate (not higher than 11 mmol/L) and irreversible insulin-resistant hyperglycemia in about 1/3 of the individuals, and all the restrained mice had adrenal hypertrophy. CRS induced the apoptosis of neurons in the anterior part of commissural subnucleus of nucleus tractus solitarius (acNTS) in the hyperglycemic mice, and acNTS mechanical damage also led to insulin-resistant hyperglycemia. In contrast, in the DEX-treated mice, adrenal gland atrophy was evident. The glucose and insulin tolerance varied with the delay of determination. DEX exposure in vivo does not induce the apoptosis of neurons in NTS. This study indicates that restraint stress and DEX induce metabolic disorders through different mechanisms. During CRS, injury (apoptosis) of glucose-sensitive acNTS neurons cause dysregulation of blood glucose. This study also suggests the mouse restraint stress model has value as a potential application in the study of stress-induced hyperglycemia.
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Affiliation(s)
- Xiang Zheng
- Department of Histology, Embryology and Neurobiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Wenjie Bi
- Department of Anatomy, Histology and Embryology, Chengdu Medical College, Chengdu, China
| | - Guizhi Yang
- Department of Histology, Embryology and Neurobiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Jia Zhao
- Department of Histology, Embryology and Neurobiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Jie Wang
- MOE Key Laboratory of Bioinformatics, Bioinformatics Division, Center for Synthetic and System Biology, Department of Automation, Tsinghua University, Beijing, China
| | - Xiaojing Li
- Department of Histology and Embryology, Fuzhou Medical College, Nanchang University, Fuzhou, China
| | - Xue Zhou
- Department of Histology, Embryology and Neurobiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
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29
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Honkala SM, Johansson J, Motiani KK, Eskelinen JJ, Virtanen KA, Löyttyniemi E, Knuuti J, Nuutila P, Kalliokoski KK, Hannukainen JC. Short-term interval training alters brain glucose metabolism in subjects with insulin resistance. J Cereb Blood Flow Metab 2018; 38:1828-1838. [PMID: 28959911 PMCID: PMC6168908 DOI: 10.1177/0271678x17734998] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Brain insulin-stimulated glucose uptake (GU) is increased in obese and insulin resistant subjects but normalizes after weight loss along with improved whole-body insulin sensitivity. Our aim was to study whether short-term exercise training (moderate intensity continuous training (MICT) or sprint interval training (SIT)) alters substrates for brain energy metabolism in insulin resistance. Sedentary subjects ( n = 21, BMI 23.7-34.3 kg/m2, age 43-55 y) with insulin resistance were randomized into MICT ( n = 11, intensity≥60% of VO2peak) or SIT ( n = 10, all-out) groups for a two-week training intervention. Brain GU during insulin stimulation and fasting brain free fatty acid uptake (FAU) was measured using PET. At baseline, brain GU was positively associated with the fasting insulin level and negatively with the whole-body insulin sensitivity. The whole-body insulin sensitivity improved with both training modes (20%, p = 0.007), while only SIT led to an increase in aerobic capacity (5%, p = 0.03). SIT also reduced insulin-stimulated brain GU both in global cortical grey matter uptake (12%, p = 0.03) and in specific regions ( p < 0.05, all areas except the occipital cortex), whereas no changes were observed after MICT. Brain FAU remained unchanged after the training in both groups. These findings show that short-term SIT effectively decreases insulin-stimulated brain GU in sedentary subjects with insulin resistance.
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Affiliation(s)
| | | | | | | | | | | | - Juhani Knuuti
- 3 Turku PET Centre, Åbo Akademi University, Turku, Finland.,4 Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Pirjo Nuutila
- 1 Turku PET Centre, University of Turku, Turku, Finland.,4 Turku PET Centre, Turku University Hospital, Turku, Finland
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30
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Salim C, Thadathil N, Muralidhara M, Rajini PS. Insights on the age dependent neurodegeneration induced by Monocrotophos, (an organophosphorous insecticide) in Caenorhabditis elegans fed high glucose: Evidence in wild and transgenic strains. Comp Biochem Physiol C Toxicol Pharmacol 2018; 211:15-24. [PMID: 29763691 DOI: 10.1016/j.cbpc.2018.05.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/25/2018] [Accepted: 05/08/2018] [Indexed: 12/13/2022]
Abstract
The higher susceptibility of high glucose fed C. elegans to Monocrotophos (MCP, an organophosphorus insecticide) - induced dopaminergic (DA) neuronal degeneration was recently demonstrated. Employing this acute exposure model, the impact of MCP on DA degeneration among worms of two age groups (8 and 13 d old) fed control (CO) and high glucose (GF) diet with specific focus on phenotypic alterations, oxidative impairments and associated molecular perturbations employing both wild (N2) and transgenic strains(BZ555 and NL5901) was investigated. In general, 13 d worms exhibited higher susceptibility to MCP intoxication compared to 8 d old worms. Further, MCP-exposure caused an enhanced degree of DA degeneration among glucose fed (GF) worms as evidenced by lower chemotaxis index, reduced long-term memory and increased nonanone repulsion. Biochemical analysis of 13 d GF worms also revealed a significant increase in ROS, protein carbonyls and reduced ADP/ATP ratio. Interestingly, marked increase in degeneration of dopaminergic neurons and increased in α-synuclein content was evident among 13 d GF worms exposed to MCP. Significant alterations in the mRNA expression levels of daf-2, age-1, sir 2.1 and aak-2 among 13 d GF worms was evident. Collectively these findings suggest that high intake of glucose diet aggravates MCP associated dopaminergic neuronal degeneration and the impact of increasing age under such a condition. Moreover it provides an experimental paradigm to explore the molecular targets and mechanism/s underlying the possible relationship between insecticide exposure-associated dopaminergic degeneration in humans under hyperglycemic conditions.
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Affiliation(s)
- Chinnu Salim
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, New Delhi, India; Department of Food Protectants and Infestation Control, CSIR-Central Food Technological Research Institute, Mysore 570 020, India
| | - Nidheesh Thadathil
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, New Delhi, India; Meat and Marine Science Department, CSIR-Central Food Technological Research Institute, Mysore 570 020, India
| | - M Muralidhara
- Department of Biochemistry, CSIR-Central Food Technological Research Institute, Mysore 570 020, India
| | - P S Rajini
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, New Delhi, India; Department of Food Protectants and Infestation Control, CSIR-Central Food Technological Research Institute, Mysore 570 020, India.
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31
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van Opstal AM, Hafkemeijer A, van den Berg-Huysmans AA, Hoeksma M, Blonk C, Pijl H, Rombouts SARB, van der Grond J. Brain activity and connectivity changes in response to glucose ingestion. Nutr Neurosci 2018; 23:110-117. [DOI: 10.1080/1028415x.2018.1477538] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- A. M. van Opstal
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
| | - A. Hafkemeijer
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
- Institute of Psychology, Department of Methodology and Statistics, Leiden University, Leiden, Netherlands
- Leiden Institute for Brain and Cognition (LIBC), Leiden, Netherlands
| | | | - M. Hoeksma
- Unilever Research & Development, Vlaardingen, Netherlands
| | - C. Blonk
- Unilever Research & Development, Vlaardingen, Netherlands
| | - H. Pijl
- Department of Internal Medicine, Section Endocrinology, Leiden University Medical Center, Leiden, Netherlands
| | - S. A. R. B. Rombouts
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
- Institute of Psychology, Department of Methodology and Statistics, Leiden University, Leiden, Netherlands
- Leiden Institute for Brain and Cognition (LIBC), Leiden, Netherlands
| | - J. van der Grond
- Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
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32
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Zhang Z, Zhang B, Wang X, Zhang X, Yang QX, Qing Z, Lu J, Bi Y, Zhu D. Altered Odor-Induced Brain Activity as an Early Manifestation of Cognitive Decline in Patients With Type 2 Diabetes. Diabetes 2018; 67:994-1006. [PMID: 29500313 DOI: 10.2337/db17-1274] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 02/23/2018] [Indexed: 11/13/2022]
Abstract
Type 2 diabetes is reported to be associated with olfactory dysfunction and cognitive decline. However, whether and how olfactory neural circuit abnormalities involve cognitive impairment in diabetes remains uncovered. This study thus aimed to investigate olfactory network alterations and the associations of odor-induced brain activity with cognitive and metabolic parameters in type 2 diabetes. Participants with normal cognition, including 51 patients with type 2 diabetes and 41 control subjects without diabetes, underwent detailed cognitive assessment, olfactory behavior tests, and odor-induced functional MRI measurements. Olfactory brain regions showing significantly different activation between the two groups were selected for functional connectivity analysis. Compared with the control subjects, patients with diabetes demonstrated significantly lower olfactory threshold score, decreased brain activation, and disrupted functional connectivity in the olfactory network. Positive associations of the disrupted functional connectivity with decreased neuropsychology test scores and reduced pancreatic function were observed in patients with diabetes. Notably, the association between pancreatic function and executive function was mediated by olfactory behavior and olfactory functional connectivity. Our results suggested the alteration of olfactory network is present before clinically measurable cognitive decrements in type 2 diabetes, bridging the gap between the central olfactory system and cognitive decline in diabetes.
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Affiliation(s)
- Zhou Zhang
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Bing Zhang
- Department of Radiology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Xin Wang
- Department of Radiology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Xin Zhang
- Department of Radiology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Qing X Yang
- Department of Radiology, Center for NMR Research, Pennsylvania State University College of Medicine, Hershey, PA
- George M. Leader Foundation Alzheimer's Laboratory, Department of Neurosurgery, Pennsylvania State University College of Medicine, Hershey, PA
| | - Zhao Qing
- Department of Radiology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Jiaming Lu
- Department of Radiology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Yan Bi
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Dalong Zhu
- Department of Endocrinology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
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