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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 2024:112294. [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] [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; Interdepartmental Research Centre "Nutraceuticals and Food for Health"
| | | | | | - Letizia Mattii
- Department of Clinical and Experimental Medicine; Interdepartmental Research Centre "Nutraceuticals and Food for Health"
| | | | | | | | - Vincenzo De Tata
- Department of Translational Research; CIME (Interdepartmental Centre of Electron Microscopy), University of Pisa, Pisa, Italy.
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Parmar P, Villalba MI, Horii Huber AS, Kalauzi A, Bartolić D, Radotić K, Willaert RG, MacFabe DF, Kasas S. Mitochondrial nanomotion measured by optical microscopy. Front Microbiol 2023; 14:1133773. [PMID: 37032884 PMCID: PMC10078959 DOI: 10.3389/fmicb.2023.1133773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 03/01/2023] [Indexed: 04/11/2023] Open
Abstract
Nanometric scale size oscillations seem to be a fundamental feature of all living organisms on Earth. Their detection usually requires complex and very sensitive devices. However, some recent studies demonstrated that very simple optical microscopes and dedicated image processing software can also fulfill this task. This novel technique, termed as optical nanomotion detection (ONMD), was recently successfully used on yeast cells to conduct rapid antifungal sensitivity tests. In this study, we demonstrate that the ONMD method can monitor motile sub-cellular organelles, such as mitochondria. Here, mitochondrial isolates (from HEK 293 T and Jurkat cells) undergo predictable motility when viewed by ONMD and triggered by mitochondrial toxins, citric acid intermediates, and dietary and bacterial fermentation products (short-chain fatty acids) at various doses and durations. The technique has superior advantages compared to classical methods since it is rapid, possesses a single organelle sensitivity, and is label- and attachment-free.
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Affiliation(s)
- Priyanka Parmar
- Laboratory of Biological Electron Microscopy, École Polytechnique Fédérale de Lausanne (EPFL) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Maria Ines Villalba
- Laboratory of Biological Electron Microscopy, École Polytechnique Fédérale de Lausanne (EPFL) and University of Lausanne (UNIL), Lausanne, Switzerland
- International Joint Research Group VUB-EPFL NanoBiotechnology and NanoMedicine (NANO), Vrije Universiteit Brussel and École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
- *Correspondence: Maria I. Villalba, ; Sandor Kasas,
| | - Alexandre Seiji Horii Huber
- Laboratory of Biological Electron Microscopy, École Polytechnique Fédérale de Lausanne (EPFL) and University of Lausanne (UNIL), Lausanne, Switzerland
| | - Aleksandar Kalauzi
- Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia
| | - Dragana Bartolić
- Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia
| | - Ksenija Radotić
- Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia
| | - Ronnie Guy Willaert
- International Joint Research Group VUB-EPFL NanoBiotechnology and NanoMedicine (NANO), Vrije Universiteit Brussel and École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
- Alliance Research Group VUB-UGent NanoMicrobiology (NAMI), Research Group Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium
| | - Derrick F. MacFabe
- Kilee Patchell-Evans Autism Research Group, London, ON, Canada
- Department of Microbiology, Faculty of Medicine, Centre of Healthy Eating and Food Innovation (HEFI), Maastricht University, Maastricht, Netherlands
| | - Sandor Kasas
- Laboratory of Biological Electron Microscopy, École Polytechnique Fédérale de Lausanne (EPFL) and University of Lausanne (UNIL), Lausanne, Switzerland
- International Joint Research Group VUB-EPFL NanoBiotechnology and NanoMedicine (NANO), Vrije Universiteit Brussel and École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
- Centre Universitaire Romand de Médecine Légale, UFAM, University of Lausanne, Lausanne, Switzerland
- *Correspondence: Maria I. Villalba, ; Sandor Kasas,
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de Siqueira EA, Magalhães EP, de Assis ALC, Sampaio TL, Lima DB, Marinho MM, Martins AMC, de Andrade GM, de Barros Viana GS. 1α,25-Dihydroxyvitamin D3 (VD3) Shows a Neuroprotective Action Against Rotenone Toxicity on PC12 Cells: An In Vitro Model of Parkinson's Disease. Neurochem Res 2023; 48:250-262. [PMID: 36066698 DOI: 10.1007/s11064-022-03735-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 08/10/2022] [Accepted: 08/22/2022] [Indexed: 01/11/2023]
Abstract
Parkinson's disease (PD) is characterized by dopaminergic cell loss in the substantia nigra, and PD brains show neuroinflammation, oxidative stress, and mitochondrial dysfunction. The study evaluated the neuroprotective activity of 1α,25-dihydroxy vitamin D3 (VD3), on the rotenone (ROT)-induced cytotoxicity in PC12 cells. The viability parameters were assessed by the MTT and flow cytometry, on cells treated or not with VD3 and/or ROT. Besides, ROS production, cell death, mitochondrial transmembrane potential, reduced GSH, superoxide accumulation, molecular docking (TH and Keap1-Nrf2), and TH, Nrf2, NF-kB, and VD3 receptor protein contents by western blot were evaluated. VD3 was shown to improve the viability of ROT-exposed cells. Cells exposed to ROT showed increased production of ROS and superoxide, which decreased after VD3. ROT decrease in the mitochondrial transmembrane potential was prevented, after VD3 treatment and, VD3 was shown to interact with tyrosine hydroxylase (TH) and Nrf2. While ROT decreased TH, Nrf2, and NF-kB expressions, these effects were reversed by VD3. In addition, VD3 also increased VD3 receptor protein contents and values went back to those of controls after ROT exposure. VD3 protects PC12 cells against ROT damage, by decreasing oxidative stress and improving mitochondrial function. One target seems to be the TH molecule and possibly an indirect Nrf2 activation could also justify its neuroprotective actions on this PC12 cell model of PD.
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Affiliation(s)
- Erlânia Alves de Siqueira
- Department of Physiology and Pharmacology, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
| | - Emanuel Paula Magalhães
- Department of Clinical and Toxicological Analysis, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
| | | | - Tiago Lima Sampaio
- Department of Clinical and Toxicological Analysis, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
| | - Danya Bandeira Lima
- Department of Clinical and Toxicological Analysis, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
| | - Marcia Machado Marinho
- Department of Clinical and Toxicological Analysis, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
| | - Alice Maria Costa Martins
- Department of Clinical and Toxicological Analysis, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
| | - Geanne Matos de Andrade
- Department of Physiology and Pharmacology, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil
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Faizan M, Sarkar A, Singh MP. Type 2 diabetes mellitus augments Parkinson's disease risk or the other way around: Facts, challenges and future possibilities. Ageing Res Rev 2022; 81:101727. [PMID: 36038113 DOI: 10.1016/j.arr.2022.101727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 08/01/2022] [Accepted: 08/24/2022] [Indexed: 01/31/2023]
Abstract
About 10% of the adult population is living with type 2 diabetes mellitus (T2DM) and 1% of the population over 60 years of age is suffering from Parkinson's disease (PD). A school of thought firmly believes that T2DM, an age-related disease, augments PD risk. Such relationship is reflected from the severity of PD symptoms in drug naive subjects possessing T2DM. Onset of Parkinsonian feature in case controls possessing T2DM corroborates the role of hyperglycemia in PD. A few cohort, meta-analysis and animal studies have shown an increased PD risk owing to insulin resistance. High fat diet and role of insulin signaling in the regulation of sugar metabolism, oxidative stress, α-synuclein aggregation and accumulation, inflammatory response and mitochondrial function in PD models and sporadic PD further connect the two. Although little is reported about the implication of PD in hyperglycemia and T2DM, a few studies have also contradicted. Ameliorative effect of anti-diabetic drugs on Parkinsonian symptoms and vague outcome of anti-PD medications in T2DM patients also suggest a link. The article reviews the literature supporting augmented risk of one by the other, analysis of proof of the concept, facts, challenges, future possibilities and standpoint on the subject.
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Affiliation(s)
- Mohd Faizan
- Toxicogenomics and Predictive Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226 001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India
| | - Alika Sarkar
- Toxicogenomics and Predictive Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226 001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India
| | - Mahendra Pratap Singh
- Toxicogenomics and Predictive Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226 001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India.
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Weldemariam MM, Woo J, Zhang Q. Pancreatic INS-1 β-Cell Response to Thapsigargin and Rotenone: A Comparative Proteomics Analysis Uncovers Key Pathways of β-Cell Dysfunction. Chem Res Toxicol 2022; 35:1080-1094. [PMID: 35544339 DOI: 10.1021/acs.chemrestox.2c00058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Insulin-secreting β-cells in the pancreatic islets are exposed to various endogenous and exogenous stressing conditions, which may lead to β-cell dysfunction or apoptosis and ultimately to diabetes mellitus. However, the detailed molecular mechanisms underlying β-cell's inability to survive under severe stresses remain to be explored. This study used two common chemical stressors, thapsigargin and rotenone, to induce endoplasmic reticulum (ER) and mitochondria stress in a rat insuloma INS-1 832/13 β-cell line, mimicking the conditions experienced by dysfunctional β-cells. Proteomic changes of cells upon treatment with stressors at IC50 were profiled with TMT-based quantitative proteomics and further verified using label-free quantitive proteomics. The differentially expressed proteins under stress conditions were selected for in-depth bioinformatic analysis. Thapsigargin treatment specifically perturbed unfolded protein response (UPR) related pathways; in addition, 58 proteins not previously linked to the UPR related pathways were identified with consistent upregulation under stress induced by thapsigargin. Conversely, rotenone treatment resulted in significant proteome changes in key mitochondria regulatory pathways such as fatty acid β-oxidation, cellular respiration, citric acid cycle, and respiratory electron transport. Our data also demonstrated that both stressors increased reactive oxygen species production and depleted adenosine triphosphate synthesis, resulting in significant dysregulation of oxidative phosphorylation signaling pathways. These novel dysregulated proteins may suggest an alternative mechanism of action in β-cell dysfunction and provide potential targets for probing ER- and mitochondria stress-induced β-cell death.
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Affiliation(s)
- Mehari Muuz Weldemariam
- Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, North Carolina 28081, United States
| | - Jongmin Woo
- Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, North Carolina 28081, United States
| | - Qibin Zhang
- Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, North Carolina 28081, United States.,Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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