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de Bartolomeis A, De Simone G, De Prisco M, Barone A, Napoli R, Beguinot F, Billeci M, Fornaro M. Insulin effects on core neurotransmitter pathways involved in schizophrenia neurobiology: a meta-analysis of preclinical studies. Implications for the treatment. Mol Psychiatry 2023; 28:2811-2825. [PMID: 37085712 PMCID: PMC10615753 DOI: 10.1038/s41380-023-02065-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 03/28/2023] [Accepted: 03/31/2023] [Indexed: 04/23/2023]
Abstract
Impairment of insulin action and metabolic dysregulation have traditionally been associated with schizophrenia, although the molecular basis of such association remains still elusive. The present meta-analysis aims to assess the impact of insulin action manipulations (i.e., hyperinsulinemia, hypoinsulinemia, systemic or brain insulin resistance) on glutamatergic, dopaminergic, γ-aminobutyric acid (GABA)ergic, and serotonergic pathways in the central nervous system. More than one hundred outcomes, including transcript or protein levels, kinetic parameters, and other components of the neurotransmitter pathways, were collected from cultured cells, animals, or humans, and meta-analyzed by applying a random-effects model and adopting Hedges'g to compare means. Two hundred fifteen studies met the inclusion criteria, of which 180 entered the quantitative synthesis. Significant impairments in key regulators of synaptic plasticity processes were detected as the result of insulin handlings. Specifically, protein levels of N-methyl-D-aspartate receptor (NMDAR) subunits including type 2A (NR2A) (Hedges' g = -0.95, 95%C.I. = -1.50, -0.39; p = 0.001; I2 = 47.46%) and 2B (NR2B) (Hedges'g = -0.69, 95%C.I. = -1.35, -0.02; p = 0.043; I2 = 62.09%), and Postsynaptic density protein 95 (PSD-95) (Hedges'g = -0.91, 95%C.I. = -1.51, -0.32; p = 0.003; I2 = 77.81%) were found reduced in insulin-resistant animal models. Moreover, insulin-resistant animals showed significantly impaired dopamine transporter activity, whereas the dopamine D2 receptor mRNA expression (Hedges'g = 3.259; 95%C.I. = 0.497, 6.020; p = 0.021; I2 = 90.61%) increased under insulin deficiency conditions. Insulin action modulated glutamate and GABA release, as well as several enzymes involved in GABA and serotonin synthesis. These results suggest that brain neurotransmitter systems are susceptible to insulin signaling abnormalities, resembling the discrete psychotic disorders' neurobiology and possibly contributing to the development of neurobiological hallmarks of treatment-resistant schizophrenia.
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Affiliation(s)
- Andrea de Bartolomeis
- Section of Psychiatry, Laboratory of Molecular and Translational Psychiatry, Unit of Treatment-Resistant Psychiatric Disorders, Department of Neuroscience, Reproductive Sciences and Odontostomatology University of Naples "Federico II", School of Medicine, Via Pansini 5, 80131, Naples, Italy.
| | - Giuseppe De Simone
- Section of Psychiatry, Laboratory of Molecular and Translational Psychiatry, Unit of Treatment-Resistant Psychiatric Disorders, Department of Neuroscience, Reproductive Sciences and Odontostomatology University of Naples "Federico II", School of Medicine, Via Pansini 5, 80131, Naples, Italy
| | - Michele De Prisco
- Section of Psychiatry, Laboratory of Molecular and Translational Psychiatry, Unit of Treatment-Resistant Psychiatric Disorders, Department of Neuroscience, Reproductive Sciences and Odontostomatology University of Naples "Federico II", School of Medicine, Via Pansini 5, 80131, Naples, Italy
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, 170 Villarroel st, 12-0, 08036, Barcelona, Catalonia, Spain
| | - Annarita Barone
- Section of Psychiatry, Laboratory of Molecular and Translational Psychiatry, Unit of Treatment-Resistant Psychiatric Disorders, Department of Neuroscience, Reproductive Sciences and Odontostomatology University of Naples "Federico II", School of Medicine, Via Pansini 5, 80131, Naples, Italy
| | - Raffaele Napoli
- Department of Translational Medical Sciences, University of Naples "Federico II", Via S. Pansini 5, 80131, Naples, Italy
- URT Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Francesco Beguinot
- Department of Translational Medical Sciences, University of Naples "Federico II", Via S. Pansini 5, 80131, Naples, Italy
- URT Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Martina Billeci
- Section of Psychiatry, Laboratory of Molecular and Translational Psychiatry, Unit of Treatment-Resistant Psychiatric Disorders, Department of Neuroscience, Reproductive Sciences and Odontostomatology University of Naples "Federico II", School of Medicine, Via Pansini 5, 80131, Naples, Italy
| | - Michele Fornaro
- Section of Psychiatry, Laboratory of Molecular and Translational Psychiatry, Unit of Treatment-Resistant Psychiatric Disorders, Department of Neuroscience, Reproductive Sciences and Odontostomatology University of Naples "Federico II", School of Medicine, Via Pansini 5, 80131, Naples, Italy
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Guo F, Ren Z, Liu D, Wang L, Hou X, Chen W. The Inhibitory Effect of Regulatory T Cells on the Intimal Hyperplasia of Tissue-Engineered Blood Vessels in Diabetic Pigs. Front Bioeng Biotechnol 2022; 10:929867. [PMID: 35957644 PMCID: PMC9360552 DOI: 10.3389/fbioe.2022.929867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 06/17/2022] [Indexed: 11/13/2022] Open
Abstract
Severe inflammatory response and functional impairment of endothelial progenitor cells (EPCs) often lead to the implantation failure of EPC-captured tissue-engineered blood vessels (TEBVs) in diabetes. Regulatory T cells (Treg cells) are the most important inhibitory immune cells, but their effects in angiogenesis remain undefined, and the differences in the microenvironment may be an important reason. Here, we constructed a TEBV coated with an anti-CD34 antibody-functionalized heparin-collagen multilayer (anti-CD34 antibody-modified TEBV) using layer-by-layer self-assembly. Then, TEBVs were implanted into diabetic pigs. All TEBVs remained unobstructed 60 days after implantation, although varying degrees of intimal hyperplasia were detectable. Severe intimal hyperplasia was observed in the control group and peripheral injection of Treg cells group. Intravenous injection of Treg cells significantly inhibited intimal hyperplasia, inflammation, and cell apoptosis. Moreover, intravenous injection increased the proportion of circulating EPCs, while peripheral injection did not have these effects and reduced microvessel density around the TEBV. Interestingly, many Nestin+ cells could be detected in TEBVs, most of which were fusiform, showing the characteristics of smooth-muscle cells. Treg cell intravenous transplantation markedly reduced the number of Nestin+ cells in the TEBV. In conclusion, Treg cells inhibited the intimal hyperplasia of TEBVs in diabetic pigs by promoting EPC mobilization, anti-inflammatory action, and cellular protection.
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Affiliation(s)
- Fengjie Guo
- Outpatient Department, The 8th Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Zhipeng Ren
- Department of Thoracic Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Dongxu Liu
- Department of Pathology, The 8th Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Linghui Wang
- Department of Thoracic Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xiaobin Hou
- Department of Thoracic Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- *Correspondence: Wen Chen, ; Xiaobin Hou,
| | - Wen Chen
- Department of Pathology, The 8th Medical Center, Chinese PLA General Hospital, Beijing, China
- *Correspondence: Wen Chen, ; Xiaobin Hou,
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Peruri A, Morgan A, D’Souza A, Mellon B, Hung CW, Kayal G, Shin H, Nguyen K, Zahed M, Yount M, Ellis R, Wynne T, Fritz V, Simmons Z, Roballo KCS. Pineal Gland from the Cell Culture to Animal Models: A Review. LIFE (BASEL, SWITZERLAND) 2022; 12:life12071057. [PMID: 35888145 PMCID: PMC9317964 DOI: 10.3390/life12071057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/05/2022] [Accepted: 07/12/2022] [Indexed: 12/11/2022]
Abstract
This review demonstrates current literature on pineal gland physiology, pathology, and animal model experiments to concisely explore future needs in research development with respect to pineal gland function and neuro-regenerative properties. The pineal gland plays an integral role in sleep and recovery by promoting physiologic circadian rhythms via production and release of melatonin. Yet, the current literature shows that the pineal gland has neuroprotective effects that modulate both peripheral and central nerve injuries through several direct and indirect mechanisms, such as angiogenesis and induction of growth factors and anti-inflammatory mediators. Animal models have also shown correlations between pineal gland function and metabolic homeostasis. Studies have shown that a functional pineal gland is essential in preventing and slowing the progression of certain diseases such as diabetes, osteoporosis, vertebral osteoarthritis, and neurodegenerative processes. Lastly, the array of cell culturing methods and animal models that can be used to further develop the study of pineal gland function and nervous system injury were reviewed.
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Affiliation(s)
- Alekhya Peruri
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Alexandra Morgan
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Alida D’Souza
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Bridget Mellon
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Carey W. Hung
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Gabriella Kayal
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Haejung Shin
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Kim Nguyen
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Malek Zahed
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Mason Yount
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Reilly Ellis
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Taylor Wynne
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Virginia Fritz
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Zachary Simmons
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
| | - Kelly C. S. Roballo
- Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, 2265 Kraft Drive, Blacksburg, VA 24060, USA; (A.P.); (A.M.); (A.D.); (B.M.); (C.W.H.); (G.K.); (H.S.); (K.N.); (M.Z.); (M.Y.); (R.E.); (T.W.); (V.F.); (Z.S.)
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, 1410 Prices Fork, Blacksburg, VA 24060, USA
- Correspondence:
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Cai Y, Li X, Zhou H, Zhou J. The serotonergic system dysfunction in diabetes mellitus. Front Cell Neurosci 2022; 16:899069. [PMID: 35910256 PMCID: PMC9331500 DOI: 10.3389/fncel.2022.899069] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 06/27/2022] [Indexed: 11/13/2022] Open
Abstract
Most peripheral serotonin (5-HT) is synthesized in enterochromaffin cells, and most circulating 5-HT is stored in platelets. As a monoamine, 5-HT has several functions in various non-neuronal and neuronal systems. In the central nervous system, it functions as a neurotransmitter to modulate feeding behavior and mood. Numerous clinical trials have focused on increasing 5-HT activation in the central nervous system, including those involving anti-obesity drugs currently in the market, although severe side effects on peripheral system can lead to the withdrawal of certain drugs. Recent studies have revealed that both the peripheral and central serotonergic systems play a vital role in diabetes and its complications. This review summarizes the roles of the serotonergic system in blood glucose regulation, diabetic macroangiopathy, diabetic peripheral neuropathy, and diabetic encephalopathy, indicating its potential clinical significance as a therapeutic target for the treatment of diabetes and its complications.
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Amer ME, Othamn AI, El-Missiry MA. Melatonin ameliorates diabetes-induced brain injury in rats. Acta Histochem 2021; 123:151677. [PMID: 33401187 DOI: 10.1016/j.acthis.2020.151677] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 12/23/2020] [Accepted: 12/24/2020] [Indexed: 01/30/2023]
Abstract
Diabetic brain is a serious complication of diabetes, and it is associated with oxidative stress and neuronal injury. This study investigated the protective effect of melatonin (MLT) on diabetes-induced brain injury. A rat model of type 2 diabetes mellitus was produced by intraperitoneal injection of nicotinamide 100 mg/kg, followed by intraperitoneal injection of streptozotocin 55 mg/kg. The diabetic rats were orally administered MLT 10 mg/kg of body weight for 15 days. MLT remarkably downregulated serum glucose levels. It also improved levels of the lipid peroxidation product 4-hydroxynonenal, improved levels of antioxidants including glutathione, glutathione peroxidase and glutathione reductase in the brains of the diabetic rats, and this is indicative of the antioxidant potential of MLT. MLT also prevented increase in homocysteine, amyloid-β42 and tau levels in diabetic rats, and this suggests that it can reduce the risk of dementia. This is associated with reduction in the levels of the dopamine, serotonin, and glutamate and is indicative of the regulatory effect of MLT on neurotransmitters. Treatment with MLT improved diabetes-induced structural alteration in the hippocampus and cerebral cortex. MLT significantly reduced caspase-3 and Bax as well as significantly increase Bcl-2 protein and GFAP-positive astrocytes indicating its anti-apoptotic effect. MLT showed remarkable ameliorative effect against biochemical and molecular alterations in the brains of diabetic rats most likely through its antioxidant property.
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Affiliation(s)
- Maggie E Amer
- Faculty of Science, Mansoura University, Mansoura, Egypt.
| | - Azza I Othamn
- Faculty of Science, Mansoura University, Mansoura, Egypt
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Prusik M, Lewczuk B. Roles of Direct Photoreception and the Internal Circadian Oscillator in the Regulation of Melatonin Secretion in the Pineal Organ of the Domestic Turkey: A Novel In Vitro Clock and Calendar Model. Int J Mol Sci 2019; 20:ijms20164022. [PMID: 31426535 PMCID: PMC6721154 DOI: 10.3390/ijms20164022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/10/2019] [Accepted: 08/15/2019] [Indexed: 01/03/2023] Open
Abstract
The regulation of melatonin secretion in the avian pineal organ is highly complex and shows prominent interspecies differences. The aim of this study was to determine the roles of direct photoreception and the internal oscillator in the regulation of melatonin secretion in the pineal organ of the domestic turkey. The pineal organs were collected from 12-, 13- and 14-week-old female turkeys reared under a 12 L:12 D cycle with the photophase from 07.00 to 19.00, and were incubated in superfusion culture for 3-6 days. The cultures were subjected to different light conditions including 12 L:12 D cycles with photophases between 07.00 and 19.00, 13.00 and 01.00 or 01.00 and 13.00, a reversed cycle 12 D:12 L, cycles with long (16 L:8 D) and short (8 L:16 D) photophases, and continuous darkness or illumination. The pineal organs were also exposed to light pulses of variable duration during incubation in darkness or to periods of darkness during the photophase. The secretion of melatonin was determined by direct radioimmunoassay. The turkey pineal organs secreted melatonin in a well-entrained diurnal rhythm with a very high amplitude. Direct photoreception as an independently acting mechanism was able to ensure quick and precise adaptation of the melatonin secretion rhythm to changes in light-dark conditions. The pineal organs secreted melatonin in circadian rhythms during incubation in continuous darkness or illumination. The endogenous oscillator of turkey pinealocytes was able to acquire and store information about the light-dark cycle and then to generate the circadian rhythm of melatonin secretion in continuous darkness according to the stored data. The obtained data suggest that the turkey pineal gland is highly autonomous in the generation and regulation of the melatonin secretion rhythm. They also demonstrate that the turkey pineal organ in superfusion culture is a valuable model for chronobiological studies, providing a highly precise clock and calendar. This system has several features which make it an attractive alternative to other avian pineal glands for circadian studies.
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Affiliation(s)
- Magdalena Prusik
- Department of Histology and Embryology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13, Olsztyn 10-719, Poland
| | - Bogdan Lewczuk
- Department of Histology and Embryology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13, Olsztyn 10-719, Poland.
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