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Galinelli NC, Bamford NJ, Erdody ML, Warnken T, de Laat MA, Sillence MN, Harris PA, Bailey SR. Effect of short-term dopamine reduction on insulin sensitivity and post-prandial insulin and glucose responses in Standardbred horses. Domest Anim Endocrinol 2025; 90:106893. [PMID: 39486097 DOI: 10.1016/j.domaniend.2024.106893] [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: 07/02/2024] [Revised: 09/30/2024] [Accepted: 10/18/2024] [Indexed: 11/04/2024]
Abstract
The role of dopamine in the regulation of insulin secretion in horses is poorly understood and requires further investigation. Pituitary pars intermedia dysfunction (PPID) is associated with decreased activity of dopaminergic neurons which normally suppress peptide hormone secretion from the pituitary pars intermedia. A high proportion of horses with PPID also have insulin dysregulation (ID), characterised by post-prandial hyperinsulinaemia and/or tissue insulin resistance, which are risk factors for the development of laminitis. The aim of this study was to investigate the effects of alpha-methyl-para-tyrosine (AMPT), a tyrosine hydroxylase inhibitor that reduces dopamine production, on insulin sensitivity and the post-prandial insulin response to a glucose-containing meal. Six healthy Standardbred horses were enrolled in a placebo-controlled randomised crossover study, in which one dose of AMPT (40 mg/kg BW) or placebo was administered orally, prior to performing an in-feed oral glucose test (OGT) and a frequently sampled intravenous glucose tolerance test (FSIGTT). Dopamine reduction by AMPT was confirmed by an increase in plasma prolactin concentration and the lack of post-prandial increase in plasma dopamine concentration compared to placebo. Post-prandial insulin responses, both peak and AUCi, were increased after AMPT compared to placebo (P=0.048 and P=0.005, respectively), without affecting blood glucose concentrations. However, one dose of AMPT did not appear to affect tissue sensitivity as assessed by the FSIGTT. This study confirmed that dopamine plays a role in the regulation of insulin secretion in horses, as it does in other species, whereby the post-prandial release of dopamine into the circulation may inhibit pancreatic insulin secretion. Further studies are required to evaluate different dosing protocols for AMPT, and to further investigate the links between PPID, ID and laminitis risk in horses.
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Affiliation(s)
- Nicolas C Galinelli
- Melbourne Veterinary School, The University of Melbourne, Parkville, Victoria, Australia
| | - Nicholas J Bamford
- Melbourne Veterinary School, The University of Melbourne, Parkville, Victoria, Australia
| | - Madison L Erdody
- Melbourne Veterinary School, The University of Melbourne, Parkville, Victoria, Australia
| | - Tobias Warnken
- Boehringer Ingelheim Vetmedica GmbH, Ingelheim am Rhein, Germany
| | - Melody A de Laat
- School of Biology and Environmental Science, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Martin N Sillence
- School of Biology and Environmental Science, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Patricia A Harris
- Equine Studies Group, Waltham Petcare Science Institute, Melton Mowbray, United Kingdom
| | - Simon R Bailey
- Melbourne Veterinary School, The University of Melbourne, Parkville, Victoria, Australia.
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2
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Ajiboye BO, Omojolomoloju TE, Salami SA, Onikanni SA, Hosseinzadeh H, Mopuri R, Oyinloye BE. Effect of Dalbergiella welwitschi alkaloid-rich extracts on neuroprotective in streptozotocin-induced diabetic rats. Metab Brain Dis 2024; 39:1353-1362. [PMID: 39093507 DOI: 10.1007/s11011-024-01386-9] [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: 10/19/2023] [Accepted: 07/07/2024] [Indexed: 08/04/2024]
Abstract
The neuroprotective ability of alkaloid-rich leaf extract of Dalbergiella welwitschii in streptozotocin-induced type 2 diabetic rats were investigated in this study. Dalbergiella welwitshii leaf alkaloid-rich extract was obtained using standard procedure. Streptozotocin was injected into the experimental animals intraperitoneally at a dose of 45 mg/mg body weight. Prior to this, the animals were given 20% (w/v) fructose for one week. The animals were grouped into five (n = 8), comprising of normal control (NC), diabetic control (DC), diabetic rats treated with low (50 mg/mg body weight) and high (100 mg/kg body weight) doses of Dalbergiella welwitschii alkaloid-rich leaf extracts (i.e., DWL and DWH respectively) and 200 mg/kg body weight of metformin (MET). The animals were sacrificed on the 21st day, blood and brain tissue were harvested and used for the determination of neurotransmitters, cholinesterase, some ATP activities, oxidative stress biomarkers and histological examination. The results show that diabetic rats placed on DWL, DWH and MET significantly (p < 0.05) reduced cholinergic, elevated some ATPase activities and ameliorated oxidative stress biomarkers. These were supported by the histological examination by improving neuroprotective effects in diabetic rats administered DWL, DWH and MET. Hence, it can be presumed that DWL and DWH could be beneficial in treating diabetic neurodegenerative diseases.
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Affiliation(s)
- Basiru Olaitan Ajiboye
- Phytomedicine and Molecular Toxicology Research Laboratory, Department of Biochemistry, Federal University Oye-Ekiti, Oye-Ekiti, Ekiti State, Nigeria.
- Institute of Drug Research and Development, SE Bogoro Center, Afe Babalola University, Ado-Ekiti, Nigeria.
| | - Tofunmi Enitan Omojolomoloju
- Phytomedicine and Molecular Toxicology Research Laboratory, Department of Biochemistry, Federal University Oye-Ekiti, Oye-Ekiti, Ekiti State, Nigeria
| | - Salmat Adenike Salami
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, Ado-Ekiti, Nigeria
| | - Sunday Amos Onikanni
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, Ado-Ekiti, Nigeria
- Graduate Institute of Biomedical Science, College of Medicine, China Medical University, Taichung, Taiwan
| | - Hossein Hosseinzadeh
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, P.O. Box: 1365-91775, Mashhad, Iran
| | - Ramgopal Mopuri
- Department of Biochemistry, Bharatiya Engineering Science and Technology Innovation University, Gorantla, Anantapur, Andhra Pradesh, India
| | - Babatunji Emmanuel Oyinloye
- Institute of Drug Research and Development, SE Bogoro Center, Afe Babalola University, Ado-Ekiti, Nigeria
- Phytomedicine, Biochemical Toxicology and Biotechnology Research Laboratories, Department of Biochemistry, College of Sciences, Afe Babalola University, Ado-Ekiti, Nigeria
- Biotechnology and Structural Biology (BSB) Group, Department of Biochemistry and Microbiology, University of Zululand, Kwadlangezwa, 3886, South Africa
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3
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Ferrero E, Masini M, Carli M, Moscato S, Beffy P, Vaglini F, Mattii L, Corti A, Scarselli M, Novelli M, De Tata V. Dopamine-mediated autocrine inhibition of insulin secretion. Mol Cell Endocrinol 2024; 592:112294. [PMID: 38838763 DOI: 10.1016/j.mce.2024.112294] [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: 02/20/2024] [Revised: 05/15/2024] [Accepted: 06/01/2024] [Indexed: 06/07/2024]
Abstract
The aim of the present research was to explore the mechanisms underlying the role of dopamine in the regulation of insulin secretion in beta cells. The effect of dopamine on insulin secretion was investigated on INS 832/13 cell line upon glucose and other secretagogues stimulation. Results show that dopamine significantly inhibits insulin secretion stimulated by both glucose and other secretagogues, while it has no effect on the basal secretion. This effect requires the presence of dopamine during incubation with the various secretagogues. Both electron microscopy and immunohistochemistry indicate that in beta cells the D2 dopamine receptor is localized within the insulin granules. Blocking dopamine entry into the insulin granules by inhibiting the VMAT2 transporter with tetrabenazine causes a significant increase in ROS production. Our results confirm that dopamine plays an important role in the regulation of insulin secretion by pancreatic beta cells through a regulated and precise compartmentalization mechanisms.
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Affiliation(s)
| | | | | | - Stefania Moscato
- Department of Clinical and Experimental Medicine, Italy; Interdepartmental Research Centre "Nutraceuticals and Food for Health", Italy
| | | | | | - Letizia Mattii
- Department of Clinical and Experimental Medicine, Italy; Interdepartmental Research Centre "Nutraceuticals and Food for Health", Italy
| | | | | | | | - Vincenzo De Tata
- Department of Translational Research, Italy; CIME (Interdepartmental Centre of Electron Microscopy), University of Pisa, Pisa, Italy.
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4
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Sawamoto A, Okada M, Matsuoka N, Okuyama S, Nakajima M. Tipepidine activates AMPK and improves adipose tissue fibrosis and glucose intolerance in high-fat diet-induced obese mice. FASEB J 2024; 38:e23542. [PMID: 38466234 DOI: 10.1096/fj.202301861rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/13/2024] [Accepted: 02/23/2024] [Indexed: 03/12/2024]
Abstract
Tipepidine (3-[di-2-thienylmethylene]-1-methylpiperidine) (TP) is a non-narcotic antitussive used in Japan. Recently, the potential application of TP in the treatment of neuropsychiatric disorders, such as depression and attention deficit hyperactivity disorder, has been suggested; however, its functions in energy metabolism are unknown. Here, we demonstrate that TP exhibits a metabolism-improving action. The administration of TP reduced high-fat diet-induced body weight gain in mice and lipid accumulation in the liver and increased the weight of epididymal white adipose tissue (eWAT) in diet-induced obese (DIO) mice. Furthermore, TP inhibited obesity-induced fibrosis in the eWAT. We also found that TP induced AMP-activated protein kinase (AMPK) activation in the eWAT of DIO mice and 3T3-L1 cells. TP-induced AMPK activation was abrogated by the transfection of liver kinase B1 siRNA in 3T3-L1 cells. The metabolic effects of TP were almost equivalent to those of metformin, an AMPK activator that is used as a first-line antidiabetic drug. In summary, TP is a potent AMPK activator, suggesting its novel role as an antidiabetic drug owing to its antifibrotic effect on adipose tissues.
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Affiliation(s)
- Atsushi Sawamoto
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, Matsuyama, Ehime, Japan
| | - Madoka Okada
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, Matsuyama, Ehime, Japan
| | - Nanako Matsuoka
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, Matsuyama, Ehime, Japan
| | - Satoshi Okuyama
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, Matsuyama, Ehime, Japan
| | - Mitsunari Nakajima
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, Matsuyama, Ehime, Japan
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5
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Mönnich D, Humphrys LJ, Höring C, Hoare BL, Forster L, Pockes S. Activation of Multiple G Protein Pathways to Characterize the Five Dopamine Receptor Subtypes Using Bioluminescence Technology. ACS Pharmacol Transl Sci 2024; 7:834-854. [PMID: 38481695 PMCID: PMC10928903 DOI: 10.1021/acsptsci.3c00339] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/17/2024] [Accepted: 01/23/2024] [Indexed: 11/01/2024]
Abstract
G protein-coupled receptors show preference for G protein subtypes but can recruit multiple G proteins with various downstream signaling cascades. This functional selection can guide drug design. Dopamine receptors are both stimulatory (D1-like) and inhibitory (D2-like) with diffuse expression across the central nervous system. Functional selectivity of G protein subunits may help with dopamine receptor targeting and their downstream effects. Three bioluminescence-based assays were used to characterize G protein coupling and function with the five dopamine receptors. Most proximal to ligand binding was the miniG protein assay with split luciferase technology used to measure recruitment. For endogenous and selective ligands, the G-CASE bioluminescence resonance energy transfer (BRET) assay measured G protein activation and receptor selectivity. Downstream, the BRET-based CAMYEN assay quantified cyclic adenosine monophosphate (cAMP) changes. Several dopamine receptor agonists and antagonists were characterized for their G protein recruitment and cAMP effects. G protein selectivity with dopamine revealed potential Gq coupling at all five receptors, as well as the ability to activate subtypes with the "opposite" effects to canonical signaling. D1-like receptor agonist (+)-SKF-81297 and D2-like receptor agonist pramipexole showed selectivity at all receptors toward Gs or Gi/o/z activation, respectively. The five dopamine receptors show a wide range of potentials for G protein coupling and activation, reflected in their downstream cAMP signaling. Targeting these interactions can be achieved through drug design. This opens the door to pharmacological treatment with more selectivity options for inducing the correct physiological events.
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Affiliation(s)
- Denise Mönnich
- Institute
of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Laura J. Humphrys
- Institute
of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Carina Höring
- Institute
of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Bradley L. Hoare
- Florey
Institute of Neuroscience and Mental Health, 30 Royal Parade, Parkville, Victoria 3052, Australia
| | - Lisa Forster
- Institute
of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Steffen Pockes
- Institute
of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
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6
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Liu Y, Su L, Wang R, Dai X, Li X, Chang Y, Zhao S, Chen H, Yin Z, Wu G, Zhou H, Zheng L, Zhai Y. Comparative 4D Label-Free Quantitative Proteomic Analysis of Bombus terrestris Provides Insights into Proteins and Processes Associated with Diapause. Int J Mol Sci 2023; 25:326. [PMID: 38203496 PMCID: PMC10778897 DOI: 10.3390/ijms25010326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 12/17/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
Diapause, an adaptative strategy for survival under harsh conditions, is a dynamic multi-stage process. Bombus terrestris, an important agricultural pollinator, is declining in the wild, but artificial breeding is possible by imitating natural conditions. Mated queen bees enter reproductive diapause in winter and recover in spring, but the regulatory mechanisms remain unclear. Herein, we conducted a comparative 4D label-free proteomic analysis of queen bees during artificial breeding at seven timepoints, including pre-diapause, diapause, and post-diapause stages. Through bioinformatics analysis of proteomic and detection of substance content changes, our results found that, during pre-diapause stages, queen bees had active mitochondria with high levels of oxidative phosphorylation, high body weight, and glycogen and TAG content, all of which support energy consumption during subsequent diapause. During diapause stages, body weight and water content were decreased but glycerol increased, contributing to cold resistance. Dopamine content, immune defense, and protein phosphorylation were elevated, while fat metabolism, protein export, cell communication, signal transduction, and hydrolase activity decreased. Following diapause termination, JH titer, water, fatty acid, and pyruvate levels increased, catabolism, synaptic transmission, and insulin signaling were stimulated, ribosome and cell cycle proteins were upregulated, and cell proliferation was accelerated. Meanwhile, TAG and glycogen content decreased, and ovaries gradually developed. These findings illuminate changes occurring in queen bees at different diapause stages during commercial production.
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Affiliation(s)
- Yan Liu
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Long Su
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Ruijuan Wang
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Xiaoyan Dai
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Xiuxue Li
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Yuqing Chang
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Shan Zhao
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Hao Chen
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Zhenjuan Yin
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Guang’an Wu
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
| | - Hao Zhou
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
| | - Li Zheng
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
| | - Yifan Zhai
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 23788 Gongye North Road, Jinan 250100, China; (Y.L.); (L.S.); (R.W.); (X.D.); (X.L.); (Y.C.); (S.Z.); (H.C.); (Z.Y.); (L.Z.)
- Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China; (G.W.); (H.Z.)
- Shandong Provincial Engineering Technology Research Center on Biocontrol of Crops Pests, Jinan 250100, China
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Lisco G, De Tullio A, Iovino M, Disoteo O, Guastamacchia E, Giagulli VA, Triggiani V. Dopamine in the Regulation of Glucose Homeostasis, Pathogenesis of Type 2 Diabetes, and Chronic Conditions of Impaired Dopamine Activity/Metabolism: Implication for Pathophysiological and Therapeutic Purposes. Biomedicines 2023; 11:2993. [PMID: 38001993 PMCID: PMC10669051 DOI: 10.3390/biomedicines11112993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/03/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
Dopamine regulates several functions, such as voluntary movements, spatial memory, motivation, sleep, arousal, feeding, immune function, maternal behaviors, and lactation. Less clear is the role of dopamine in the pathophysiology of type 2 diabetes mellitus (T2D) and chronic complications and conditions frequently associated with it. This review summarizes recent evidence on the role of dopamine in regulating insular metabolism and activity, the pathophysiology of traditional chronic complications associated with T2D, the pathophysiological interconnection between T2D and chronic neurological and psychiatric disorders characterized by impaired dopamine activity/metabolism, and therapeutic implications. Reinforcing dopamine signaling is therapeutic in T2D, especially in patients with dopamine-related disorders, such as Parkinson's and Huntington's diseases, addictions, and attention-deficit/hyperactivity disorder. On the other hand, although specific trials are probably needed, certain medications approved for T2D (e.g., metformin, pioglitazone, incretin-based therapy, and gliflozins) may have a therapeutic role in such dopamine-related disorders due to anti-inflammatory and anti-oxidative effects, improvement in insulin signaling, neuroinflammation, mitochondrial dysfunction, autophagy, and apoptosis, restoration of striatal dopamine synthesis, and modulation of dopamine signaling associated with reward and hedonic eating. Last, targeting dopamine metabolism could have the potential for diagnostic and therapeutic purposes in chronic diabetes-related complications, such as diabetic retinopathy.
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Affiliation(s)
- Giuseppe Lisco
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari, 70124 Bari, Italy; (G.L.); (A.D.T.); (M.I.); (E.G.); (V.A.G.)
| | - Anna De Tullio
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari, 70124 Bari, Italy; (G.L.); (A.D.T.); (M.I.); (E.G.); (V.A.G.)
| | - Michele Iovino
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari, 70124 Bari, Italy; (G.L.); (A.D.T.); (M.I.); (E.G.); (V.A.G.)
| | - Olga Disoteo
- Diabetology Unit, ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy;
| | - Edoardo Guastamacchia
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari, 70124 Bari, Italy; (G.L.); (A.D.T.); (M.I.); (E.G.); (V.A.G.)
| | - Vito Angelo Giagulli
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari, 70124 Bari, Italy; (G.L.); (A.D.T.); (M.I.); (E.G.); (V.A.G.)
| | - Vincenzo Triggiani
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari, 70124 Bari, Italy; (G.L.); (A.D.T.); (M.I.); (E.G.); (V.A.G.)
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8
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Gayden J, Puig S, Srinivasan C, Phan BN, Abdelhady G, Buck SA, Gamble MC, Tejeda HA, Dong Y, Pfenning AR, Logan RW, Freyberg Z. Integrative multi-dimensional characterization of striatal projection neuron heterogeneity in adult brain. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.04.539488. [PMID: 37205475 PMCID: PMC10187292 DOI: 10.1101/2023.05.04.539488] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Striatal projection neurons (SPNs) are traditionally segregated into two subpopulations expressing dopamine (DA) D1-like or D2-like receptors. However, this dichotomy is challenged by recent evidence. Functional and expression studies raise important questions: do SPNs co-express different DA receptors, and do these differences reflect unique striatal spatial distributions and expression profiles? Using RNAscope in mouse striatum, we report heterogenous SPN subpopulations distributed across dorsal-ventral and rostral-caudal axes. SPN subpopulations co-express multiple DA receptors, including D1 and D2 (D1/2R) and D1 and D3. Our integrative approach using single-nuclei multi-omics analyses provides a simple consensus to describe SPNs across diverse datasets, connecting it to complementary spatial mapping. Combining RNAscope and multi-omics shows D1/2R SPNs further separate into distinct subtypes according to spatial organization and conserved marker genes. Each SPN cell type contributes uniquely to genetic risk for neuropsychiatric diseases. Our results bridge anatomy and transcriptomics to offer new understandings of striatal neuron heterogeneity.
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Affiliation(s)
- Jenesis Gayden
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Stephanie Puig
- Department of Psychiatry, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Chaitanya Srinivasan
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - BaDoi N. Phan
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Medical-Scientist Training Program, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Ghada Abdelhady
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Silas A. Buck
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Mackenzie C. Gamble
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, USA
- Molecular and Translational Medicine, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Hugo A. Tejeda
- Unit on Neuromodulation and Synaptic Integration, National Institute of Mental Health, Bethesda, MD 20894, USA
| | - Yan Dong
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Andreas R. Pfenning
- Department of Computational Biology, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Ryan W. Logan
- Department of Psychiatry, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
- Department of Neurobiology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Zachary Freyberg
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, PA 15213, USA
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9
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Li Y, Tan Y, Ren L, Li Q, Sui J, Liu S. Structural and expression analysis of the dopamine receptors reveals their crucial roles in regulating the insulin signaling pathway in oysters. Int J Biol Macromol 2023; 247:125703. [PMID: 37414315 DOI: 10.1016/j.ijbiomac.2023.125703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/30/2023] [Accepted: 07/03/2023] [Indexed: 07/08/2023]
Abstract
Dopamine performs its critical role upon binding to receptors. Since dopamine receptors are numerous and versatile, understanding their protein structures and evolution status, and identifying the key receptors involved in the modulation of insulin signaling will provide essential clues to investigate the molecular mechanism of neuroendocrine regulating the growth in invertebrates. In this study, seven dopamine receptors were identified in the Pacific oysters (Crassostrea gigas) and were classified into four subtypes according to their protein secondary and tertiary structures, and ligand-binding activities. Of which, DR2 (dopamine receptor 2) and D(2)RA-like (D(2) dopamine receptor A-like) were considered the invertebrate-specific type 1 and type 2 dopamine receptors, respectively. Expression analysis indicated that the DR2 and D(2)RA-like were highly expressed in the fast-growing oyster "Haida No.1". After in vitro incubation of ganglia and adductor muscle with exogenous dopamine and dopamine receptor antagonists, the expression of these two dopamine receptors and ILPs (insulin-like peptides) was also significantly affected. Dual-fluorescence in situ hybridization results showed that D(2)RA-like and DR2 were co-localized with MIRP3 (molluscan insulin-related peptide 3) and MIRP3-like (molluscan insulin-related peptide 3-like) in the visceral ganglia, and were co-localized with ILP (insulin-like peptide) in the adductor muscle. Furthermore, the downstream components of dopamine signaling, including PKA, ERK, CREB, CaMKK1, AKT, and GSK3β were also significantly affected by the exogenous dopamine and dopamine receptor antagonists. These findings confirmed that dopamine might affect the secretion of ILPs through the invertebrate-specific dopamine receptors D(2)RA-like and DR2, and thus played crucial roles in the growth regulation of the Pacific oysters. Our study establishes the potential regulatory relationship between the dopaminergic system and insulin-like signaling pathway in marine invertebrates.
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Affiliation(s)
- Yongjing Li
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Ying Tan
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Liting Ren
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Qi Li
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, College of Fisheries, Ocean University of China, Qingdao 266003, China
| | - Jianxin Sui
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, China
| | - Shikai Liu
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, College of Fisheries, Ocean University of China, Qingdao 266003, China.
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10
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Li S, Yuan H, Yang K, Li Q, Xiang M. Pancreatic sympathetic innervation disturbance in type 1 diabetes. Clin Immunol 2023; 250:109319. [PMID: 37024024 DOI: 10.1016/j.clim.2023.109319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/15/2023] [Accepted: 03/06/2023] [Indexed: 04/08/2023]
Abstract
Pancreatic sympathetic innervation can directly affect the function of islet. The disorder of sympathetic innervation in islets during the occurrence of type 1 diabetes (T1D) has been reported to be controversial with the inducing factor unclarified. Several studies have uncovered the critical role that sympathetic signals play in controlling the local immune system. The survival and operation of endocrine cells can be regulated by immune cell infiltration in islets. In the current review, we focused on the impact of sympathetic signals working on islets cell regulation, and discussed the potential factors that can induce the sympathetic innervation disorder in the islets. We also summarized the effect of interference with the islet sympathetic signals on the T1D occurrence. Overall, complete understanding of the regulatory effect of sympathetic signals on islet cells and local immune system could facilitate to design better strategies to control inflammation and protect β cells in T1D therapy.
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Affiliation(s)
- Senlin Li
- Department of Pharmacology, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Huimin Yuan
- Department of Pharmacology, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Keshan Yang
- Department of Pharmacology, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Qing Li
- Department of Pharmacology, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ming Xiang
- Department of Pharmacology, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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11
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Freyberg Z, Gittes GK. Roles of Pancreatic Islet Catecholamine Neurotransmitters in Glycemic Control and in Antipsychotic Drug-Induced Dysglycemia. Diabetes 2023; 72:3-15. [PMID: 36538602 PMCID: PMC9797319 DOI: 10.2337/db22-0522] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 09/24/2022] [Indexed: 12/24/2022]
Abstract
Catecholamine neurotransmitters dopamine (DA) and norepinephrine (NE) are essential for a myriad of functions throughout the central nervous system, including metabolic regulation. These molecules are also present in the pancreas, and their study may shed light on the effects of peripheral neurotransmission on glycemic control. Though sympathetic innervation to islets provides NE that signals at local α-cell and β-cell adrenergic receptors to modify hormone secretion, α-cells and β-cells also synthesize catecholamines locally. We propose a model where α-cells and β-cells take up catecholamine precursors in response to postprandial availability, preferentially synthesizing DA. The newly synthesized DA signals in an autocrine/paracrine manner to regulate insulin and glucagon secretion and maintain glycemic control. This enables islets to couple local catecholamine signaling to changes in nutritional state. We also contend that the DA receptors expressed by α-cells and β-cells are targeted by antipsychotic drugs (APDs)-some of the most widely prescribed medications today. Blockade of local DA signaling contributes significantly to APD-induced dysglycemia, a major contributor to treatment discontinuation and development of diabetes. Thus, elucidating the peripheral actions of catecholamines will provide new insights into the regulation of metabolic pathways and may lead to novel, more effective strategies to tune metabolism and treat diabetes.
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Affiliation(s)
- Zachary Freyberg
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA
- Department of Cell Biology, University of Pittsburgh, Pittsburgh, PA
| | - George K. Gittes
- Division of Pediatric Surgery, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA
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12
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Kebede MA, Piston DW. Sorting Out the Receptor Isoforms Underlying Dopamine Inhibition of Insulin Secretion. Diabetes 2022; 71:1831-1833. [PMID: 35984964 DOI: 10.2337/dbi22-0018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/10/2022] [Indexed: 11/13/2022]
Affiliation(s)
- Melkam A Kebede
- Discipline of Physiology, School of Medical Sciences, Charles Perkins Centre, The University of Sydney, Camperdown, Sydney, Australia
| | - David W Piston
- Department of Cell Biology and Physiology, Washington University in St. Louis, St. Louis, MO
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