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Acuña-Castillo C, Escobar A, García-Gómez M, Bachelet VC, Huidobro-Toro JP, Sauma D, Barrera-Avalos C. P2X7 Receptor in Dendritic Cells and Macrophages: Implications in Antigen Presentation and T Lymphocyte Activation. Int J Mol Sci 2024; 25:2495. [PMID: 38473744 DOI: 10.3390/ijms25052495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/15/2024] [Accepted: 01/24/2024] [Indexed: 03/14/2024] Open
Abstract
The P2X7 receptor, a member of the P2X purinergic receptor family, is a non-selective ion channel. Over the years, it has been associated with various biological functions, from modulating to regulating inflammation. However, its emerging role in antigen presentation has captured the scientific community's attention. This function is essential for the immune system to identify and respond to external threats, such as pathogens and tumor cells, through T lymphocytes. New studies show that the P2X7 receptor is crucial for controlling how antigens are presented and how T cells are activated. These studies focus on antigen-presenting cells, like dendritic cells and macrophages. This review examines how the P2X7 receptor interferes with effective antigen presentation and activates T cells and discusses the fundamental mechanisms that can affect the immune response. Understanding these P2X7-mediated processes in great detail opens up exciting opportunities to create new immunological therapies.
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Affiliation(s)
- Claudio Acuña-Castillo
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
| | - Alejandro Escobar
- Laboratorio Biología Celular y Molecular, Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología, Universidad de Chile, Santiago 8380000, Chile
| | - Moira García-Gómez
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
| | - Vivienne C Bachelet
- Escuela de Medicina, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Santiago 9160000, Chile
| | - Juan Pablo Huidobro-Toro
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
| | - Daniela Sauma
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
- Centro Ciencia & Vida, Av. Del Valle Norte 725, Huechuraba 8580000, Chile
| | - Carlos Barrera-Avalos
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
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Mechanosensitive Vaginal Epithelial Adenosine Triphosphate Release and Pannexin 1 Channels in Healthy, in Type 1 Diabetic, and in Surgically Castrated Female Mice. J Sex Med 2020; 17:870-880. [PMID: 32241676 DOI: 10.1016/j.jsxm.2020.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 01/15/2020] [Accepted: 02/09/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND Distension of hollow organs is known to release adenosine triphosphate (ATP) from the lining epithelium, which triggers local responses and activates sensory nerves to convey information to the central nervous system. However, little is known regarding participation of ATP and mediators of ATP release, such as Pannexin 1 (Panx1) channels, in mechanisms of vaginal mechanosensory transduction and of changes imposed by diabetes and menopause, conditions associated with vaginal dysfunction and risk for impaired genital arousal. AIM To investigate if intravaginal mechanical stimulation triggers vaginal ATP release and if (a) this response involves Panx1 channels and (b) this response is altered in animal models of diabetes and menopause. METHODS Diabetic Akita female mice were used as a type 1 diabetes (T1D) model and surgical castration (ovariectomy [OVX]) as a menopause model. Panx1-null mice were used to evaluate Panx1 participation in mechanosensitive vaginal ATP release. Vaginal washes were collected from anesthetized mice at baseline (non-stimulated) and at 5 minutes after intravaginal stimulation. For the OVX and Sham groups, samples were collected before surgery and at 4, 12, 22, 24, and 28 weeks after surgery. ATP levels in vaginal washes were measured using the luciferin-luciferase assay. Panx1 mRNA levels in vaginal epithelium were quantified by quantitative polymerase chain reaction. OUTCOMES The main outcome measures are quantification of mechanosensitive vaginal ATP release and evaluation of impact of Panx1 deletion, OVX, and T1D on this response. RESULTS Intravaginal mechanical stimulation-induced vaginal ATP release was 84% lower in Panx1-null (P < .001) and 76% lower in diabetic (P < .0001) mice compared with controls and was reduced in a progressive and significant manner in OVX mice when compared with Sham. Panx1 mRNA expression in vaginal epithelium was 44% lower in diabetics than that in controls (P < .05) and 40% lower in OVX than that in the Sham (P < .05) group. CLINICAL TRANSLATION Panx1 downregulation and consequent attenuation of mechanosensitive vaginal responses may be implicated in mechanisms of female genital arousal disorder, thereby providing potential targets for novel therapies to manage this condition. STRENGTHS & LIMITATIONS Using animal models, we demonstrated Panx1 involvement in mechanosensitive vaginal ATP release and effects of T1D and menopause on this response and on Panx1 expression. A limitation is that sex steroid hormone levels were not measured, precluding correlations and insights into mechanisms that may regulate Panx1 expression in the vaginal epithelium. CONCLUSIONS Panx1 channel is a component of the vaginal epithelial mechanosensory transduction system that is essential for proper vaginal response to mechanical stimulation and is targeted in T1D and menopause. Harroche J, Urban-Maldonado M, Thi MM, et al. Mechanosensitive Vaginal Epithelial Adenosine Triphosphate Release and Pannexin 1 Channels in Healthy, in Type 1 Diabetic, and in Surgically Castrated Female Mice. J Sex Med 2020;17:870-880.
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Pfaffenzeller MS, Franciosi MLM, Cardoso AM. Purinergic signaling and tumor microenvironment in cervical Cancer. Purinergic Signal 2020; 16:123-135. [PMID: 32170538 PMCID: PMC7166227 DOI: 10.1007/s11302-020-09693-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 02/27/2020] [Indexed: 02/07/2023] Open
Abstract
Cervical cancer is the fourth most common type of cancer incidence in the world female population, and it has become a public health problem worldwide. Several factors are involved in this type of cancer, including intrinsic factors related to the inflammatory process, such as extracellular nucleotides and adenosine-components of the purinergic system. The present review focuses on the role of the purinergic system in cervical cancer, especially regarding the interaction of extracellular nucleotides with their respective receptors expressed in the tumor microenvironment of cervical cancer and their role in the host immune response. The high concentrations of extracellular nucleotides in the tumor microenvironment of cervical cancer interfere in the regulation, proliferation, differentiation, and apoptosis of cancer cells of the uterine cervix through different P1 and P2 receptor subtypes. Such diverse cellular processes that are mediated by adenosine triphosphate and adenosine across the tumor microenvironment and that also have effects on host immune defense will be reviewed here in detail.
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Affiliation(s)
| | | | - Andréia Machado Cardoso
- Academic Coordination, Medicine, Campus Chapecó, Federal University of Fronteira Sul, Chapecó, SC Brazil
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Faria RX, de Jesus Hiller N, Salles JP, Resende JALC, Diogo RT, von Ranke NL, Bello ML, Rodrigues CR, Castro HC, de Luna Martins D. Arylboronic acids inhibit P2X7 receptor function and the acute inflammatory response. J Bioenerg Biomembr 2019; 51:277-290. [PMID: 31256283 DOI: 10.1007/s10863-019-09802-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 05/26/2019] [Indexed: 02/08/2023]
Abstract
The P2X7 receptor (P2X7R) is an ion channel which is activated by interactions with the extracellular ATP molecules. The molecular complex P2X7R/ATP induces conformational changes in the protein subunits, opening a pore in the ion channel macromolecular structure. Currently, the P2X7R has been studied as a potential therapeutic target of anti-inflammatory drugs. Based on this, a series of eight boronic acids (NO) analogs were evaluated on the biologic effect of this pharmacophoric group on the human and murine P2X7R. The boronic acids derivatives NO-01 and NO-12 inhibited in vitro human and murine P2X7R function. These analogs compounds showed effect better than compound BBG and similar to inhibitor A740003 for inhibiting dye uptake, in vitro IL-1β release and ATP-induced paw edema in vivo. In both, in vitro and in vivo assays the compound NO-01 showed to be the hit compound in the present series of the arylboronic acids analogs. The molecular docking suggests that the NO derivatives bind into the upper body domain of the P2X7 pore and that the main intermolecular interaction with the two most active NO derivatives occur with the residues Phe 95, 103 and 293 by hydrophobic interactions and with Leu97, Gln98 and Ser101 by hydrogen bonds.. These results indicate that the boronic acid derivative NO-01 shows the lead compound characteristics to be used as a scaffold structure to the development of new P2X7R inhibitors with anti-inflammatory action.
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Affiliation(s)
- Robson Xavier Faria
- Laboratory of Toxoplasmosis and Other Protozoans, Instituto Oswaldo Cruz, Avenida Brasil, 4365, Pavilion 108, room 32, CEP, Rio de Janeiro, Fiocruz, 21045-900, Brazil. .,Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil.
| | - Noemi de Jesus Hiller
- Research Group on Catalysis and Synthesis, Laboratory 413, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Juliana Pimenta Salles
- Laboratory of Toxoplasmosis and Other Protozoans, Instituto Oswaldo Cruz, Avenida Brasil, 4365, Pavilion 108, room 32, CEP, Rio de Janeiro, Fiocruz, 21045-900, Brazil
| | | | - Roberta Tosta Diogo
- Laboratory of Toxoplasmosis and Other Protozoans, Instituto Oswaldo Cruz, Avenida Brasil, 4365, Pavilion 108, room 32, CEP, Rio de Janeiro, Fiocruz, 21045-900, Brazil.,Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Natalia Lidmar von Ranke
- Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil.,Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Murilo Lamim Bello
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Carlos Rangel Rodrigues
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Helena Carla Castro
- Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Daniela de Luna Martins
- Research Group on Catalysis and Synthesis, Laboratory 413, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
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Truvé K, Dickinson P, Xiong A, York D, Jayashankar K, Pielberg G, Koltookian M, Murén E, Fuxelius HH, Weishaupt H, Swartling FJ, Andersson G, Hedhammar Å, Bongcam-Rudloff E, Forsberg-Nilsson K, Bannasch D, Lindblad-Toh K. Utilizing the Dog Genome in the Search for Novel Candidate Genes Involved in Glioma Development-Genome Wide Association Mapping followed by Targeted Massive Parallel Sequencing Identifies a Strongly Associated Locus. PLoS Genet 2016; 12:e1006000. [PMID: 27171399 PMCID: PMC4865040 DOI: 10.1371/journal.pgen.1006000] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Accepted: 03/30/2016] [Indexed: 12/15/2022] Open
Abstract
Gliomas are the most common form of malignant primary brain tumors in humans and second most common in dogs, occurring with similar frequencies in both species. Dogs are valuable spontaneous models of human complex diseases including cancers and may provide insight into disease susceptibility and oncogenesis. Several brachycephalic breeds such as Boxer, Bulldog and Boston Terrier have an elevated risk of developing glioma, but others, including Pug and Pekingese, are not at higher risk. To identify glioma-associated genetic susceptibility factors, an across-breed genome-wide association study (GWAS) was performed on 39 dog glioma cases and 141 controls from 25 dog breeds, identifying a genome-wide significant locus on canine chromosome (CFA) 26 (p = 2.8 x 10-8). Targeted re-sequencing of the 3.4 Mb candidate region was performed, followed by genotyping of the 56 SNVs that best fit the association pattern between the re-sequenced cases and controls. We identified three candidate genes that were highly associated with glioma susceptibility: CAMKK2, P2RX7 and DENR. CAMKK2 showed reduced expression in both canine and human brain tumors, and a non-synonymous variant in P2RX7, previously demonstrated to have a 50% decrease in receptor function, was also associated with disease. Thus, one or more of these genes appear to affect glioma susceptibility.
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Affiliation(s)
- Katarina Truvé
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Bioinformatics Core Facility, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- * E-mail: (KT); (KLT)
| | - Peter Dickinson
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America
| | - Anqi Xiong
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Daniel York
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America
| | - Kartika Jayashankar
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America
| | - Gerli Pielberg
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Michele Koltookian
- Broad Institute of Harvard and Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts, United States of America
| | - Eva Murén
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Hans-Henrik Fuxelius
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Holger Weishaupt
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Fredrik J. Swartling
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Göran Andersson
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Åke Hedhammar
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Erik Bongcam-Rudloff
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Karin Forsberg-Nilsson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Danika Bannasch
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America
| | - Kerstin Lindblad-Toh
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
- Broad Institute of Harvard and Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts, United States of America
- * E-mail: (KT); (KLT)
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Burnstock G, Di Virgilio F. Purinergic signalling and cancer. Purinergic Signal 2014; 9:491-540. [PMID: 23797685 DOI: 10.1007/s11302-013-9372-5] [Citation(s) in RCA: 234] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Accepted: 06/06/2013] [Indexed: 01/24/2023] Open
Abstract
Receptors for extracellular nucleotides are widely expressed by mammalian cells. They mediate a large array of responses ranging from growth stimulation to apoptosis, from chemotaxis to cell differentiation and from nociception to cytokine release, as well as neurotransmission. Pharma industry is involved in the development and clinical testing of drugs selectively targeting the different P1 nucleoside and P2 nucleotide receptor subtypes. As described in detail in the present review, P2 receptors are expressed by all tumours, in some cases to a very high level. Activation or inhibition of selected P2 receptor subtypes brings about cancer cell death or growth inhibition. The field has been largely neglected by current research in oncology, yet the evidence presented in this review, most of which is based on in vitro studies, although with a limited amount from in vivo experiments and human studies, warrants further efforts to explore the therapeutic potential of purinoceptor targeting in cancer.
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Burnstock G. Purinergic signalling in the reproductive system in health and disease. Purinergic Signal 2014; 10:157-87. [PMID: 24271059 PMCID: PMC3944041 DOI: 10.1007/s11302-013-9399-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 10/24/2013] [Indexed: 12/16/2022] Open
Abstract
There are multiple roles for purinergic signalling in both male and female reproductive organs. ATP, released as a cotransmitter with noradrenaline from sympathetic nerves, contracts smooth muscle via P2X1 receptors in vas deferens, seminal vesicles, prostate and uterus, as well as in blood vessels. Male infertility occurs in P2X1 receptor knockout mice. Both short- and long-term trophic purinergic signalling occurs in reproductive organs. Purinergic signalling is involved in hormone secretion, penile erection, sperm motility and capacitation, and mucous production. Changes in purinoceptor expression occur in pathophysiological conditions, including pre-eclampsia, cancer and pain.
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Affiliation(s)
- Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK,
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