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Scheffer F, De la Cruz Borthiry FL, Cañumil VA, Franchi AM, Beltrame JS, Ribeiro ML. Lipopolysaccharide as a pro-inflammatory stimulus during early gestation delays the development of the offspring in the rat. Placenta 2022. [DOI: 10.1016/j.placenta.2022.03.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Luz de la Cruz Borthiry F, Beltrame JS, Schander JA, Franchi AM, Ribeiro ML. Chronic mild maternal stress modulates early pregnancy processes. Placenta 2022. [DOI: 10.1016/j.placenta.2022.03.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Cañumil VA, Bogetti E, de la Cruz Borthiry FL, Ribeiro ML, Beltrame JS. Steroid hormones and first trimester vascular remodeling. Vitam Horm 2021; 116:363-387. [PMID: 33752825 DOI: 10.1016/bs.vh.2021.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Successful implantation and placentation require neoangiogenesis and the remodeling of the uterine spiral arteries. Progesterone and estradiol control various of the placental functions, but their role in vascular remodeling remains controversial. Therefore, this chapter aims to summarize the current knowledge regarding the role of steroid hormones in the uteroplacental vascular remodeling during the first trimester of gestation.
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Affiliation(s)
- V A Cañumil
- Center of Pharmacological and Botanical Studies (CEFyBO), School of Medicine University of Buenos Aires (UBA)-National Research Council (CONICET), Buenos Aires, Argentina
| | - E Bogetti
- Center of Pharmacological and Botanical Studies (CEFyBO), School of Medicine University of Buenos Aires (UBA)-National Research Council (CONICET), Buenos Aires, Argentina
| | - F L de la Cruz Borthiry
- Center of Pharmacological and Botanical Studies (CEFyBO), School of Medicine University of Buenos Aires (UBA)-National Research Council (CONICET), Buenos Aires, Argentina
| | - M L Ribeiro
- Center of Pharmacological and Botanical Studies (CEFyBO), School of Medicine University of Buenos Aires (UBA)-National Research Council (CONICET), Buenos Aires, Argentina
| | - J S Beltrame
- Center of Pharmacological and Botanical Studies (CEFyBO), School of Medicine University of Buenos Aires (UBA)-National Research Council (CONICET), Buenos Aires, Argentina.
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Beltrame JS, Cañumil VA, Sordelli MS, Ribeiro ML. Novel Role for Lysophosphatidic Acid in Vascular Remodeling at the Maternal-Fetal Interface. Reproduction 2019; 159:R55-R67. [PMID: 31426027 DOI: 10.1530/rep-18-0570] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 08/19/2019] [Indexed: 11/08/2022]
Abstract
Lysophosphatidic acid (LPA) belongs to the group of phosphorylated lipids reported as crucial mediators in the physiology of reproduction. LPA binds to G-protein coupled receptors and regulates a wide range of female reproductive functions. This bioactive lipid has been also implicated in vascular functions during physiological and pathological conditions. In this regard, the establishment of a successful pregnancy requires proper coordination of vascular processes and remodeling of maternal blood vessels during early gestation. During this process, first trimester cytotrophoblast changes from an invasive to an endovascular phenotype and transforms uterine spiral arteries which are the nutrient supply for placenta and fetus. Here we present an overview of LPA participation in vascular remodeling and highlight the importance of LPA-LPA3 signaling during early gestation at the maternal-fetal interface.
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Affiliation(s)
- Jimena Soledad Beltrame
- J Beltrame, Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO (CONICET-UBA), Buenos Aires, Argentina
| | - Vanesa A Cañumil
- V Cañumil, Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO (CONICET, UBA), Buenos Aires, Argentina
| | - Micaela Soledad Sordelli
- M Sordelli, Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO (CONICET - UBA), Buenos Aires, Argentina
| | - María Laura Ribeiro
- M Ribeiro, Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO (CONICET, UBA), Buenos Aires, Argentina
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Santos PS, Caria CRP, Gotardo EMF, Ribeiro ML, Pedrazzoli J, Gambero A. Artificial sweetener saccharin disrupts intestinal epithelial cells' barrier function in vitro. Food Funct 2018; 9:3815-3822. [PMID: 29938270 DOI: 10.1039/c8fo00883c] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
SCOPE Consumption of non-nutritive sweeteners (NNS) is a dietary practice used by those who wish to lose weight or by patients on a sugar-restricted diet such as those with DM2. Although these substances are safe, possible biological interactions with the digestive tract, particularly in relation to intestinal permeability, have not been studied. Thus, the current work sought to investigate the action of different NNS on intestinal permeability using an in vitro Caco-2 cell model. METHODS AND RESULTS Caco-2 cells were incubated with acesulfame K, aspartame, saccharin, or sucralose at equimolar concentrations. Acesulfame K, aspartame, and sucralose did not disrupt monolayer integrity in the cells. However, saccharin increased paracellular permeability and decreased transepithelial electrical resistance (TEER) via a non-cytotoxic mechanism. The levels of the tight junction protein claudin-1 were reduced in Caco-2 cells that had previously been exposed to saccharin. The inhibition of nuclear factor-κB (NF-κB) was able to prevent the reduction in TEER induced by saccharin treatment. Thalidomide, as an inhibitor of ubiquitin ligase, was able to prevent the decrease in claudin-1 protein expression and the TEER reduction in Caco-2 cells. CONCLUSIONS Saccharin disrupts monolayer integrity and alters paracellular permeability in a Caco-2 cell monolayer model, via a mechanism involving NF-κB activation, resulting in the ubiquitination of the tight junction protein claudin-1. Saccharin consumption may potentially alter the intestinal integrity in humans.
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Affiliation(s)
- P S Santos
- Clinical Pharmacology and Gastroenterology Unit, São Francisco University Medical School, Bragança Paulista, SP, Brazil.
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6
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Fidalgo T, Ferreira G, Oliveira AC, Silva Pinto C, Martinho P, Mendes MJ, Duarte M, Salvado R, Ribeiro ML. Acquired von Willebrand syndrome in haematologic malignancies - how the clinical-laboratory correlation improves a challenging diagnosis - a case series. Haemophilia 2017; 23:e361-e365. [PMID: 28497886 DOI: 10.1111/hae.13243] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2017] [Indexed: 11/26/2022]
Affiliation(s)
- T Fidalgo
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - G Ferreira
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - A C Oliveira
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - C Silva Pinto
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - P Martinho
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - M J Mendes
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - M Duarte
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - R Salvado
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
| | - M L Ribeiro
- Serviço de Hematologia Clínica, Centro Hospitalar Universitãrio de Coimbra, Coimbra, Portugal
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Jaouani M, Manco L, Kalai M, Chaouch L, Douzi K, Silva A, Macedo S, Darragi I, Boudriga I, Chaouachi D, Fitouri Z, Van Wijk R, Ribeiro ML, Abbes S. Molecular basis of pyruvate kinase deficiency among Tunisians: description of new mutations affecting coding and noncoding regions in the PKLR gene. Int J Lab Hematol 2017; 39:223-231. [PMID: 28133914 DOI: 10.1111/ijlh.12610] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 10/26/2016] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Pyruvate kinase (PK) deficiency is one of the most common hereditary nonspherocytic hemolytic anemias worldwide with clinical manifestations ranging from mild to severe hemolysis. However, investigation of this enzymopathy is lacking in Tunisia. We report here a pioneer investigation of PK deficiency among Tunisian cases referred to our laboratory for biological analysis of unknown cause of hemolytic anemia. METHODS Two hundred and fifty-three patients with unknown cause of hemolytic anemia have been addressed to our laboratory in order to investigate for red blood cells genetic disorders. Red cell enzyme activities were measured by standard methods, and molecular analysis was performed by DNA sequencing. The interpretation of mutation effect and the molecular modeling were performed by using specific software. RESULTS Six different PKLR mutations were found (c.966-1G>T; c.965+1G>A; c.721G>T; c.1163C>A; c.1456C>T; c.1537T>A), among which four are described for the first time. Genotype-phenotype correlations for the novel missense mutations were investigated by three-dimensional structure analysis. CONCLUSION This study provides important data of PK deficiency among Tunisians. It might be followed by a large neonatal screening to determine the spectrum of PK mutations and identify potential deficient patients for an early medical follow-up.
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Affiliation(s)
- M Jaouani
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - L Manco
- Unidade de Hematlogia Molecular, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal.,Research Centre for Anthropology and Health (CIAS), Department of Life Sciences, Universidade de Coimbra, Coimbra, Portugal
| | - M Kalai
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - L Chaouch
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - K Douzi
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - A Silva
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - S Macedo
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - I Darragi
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - I Boudriga
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - D Chaouachi
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Z Fitouri
- Service de pédiatrie-urgences-consultations, Hôpital d'Enfants de Tunis, Tunis, Tunisia
| | - R Van Wijk
- Laboratory for Red Blood Cell Research, Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - M L Ribeiro
- Unidade de Hematlogia Molecular, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
| | - S Abbes
- Laboratoire d'Hématologie Moléculaire et Cellulaire, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
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Fidalgo T, Oliveira A, Silva Pinto C, Martinho P, Ferreira G, Salvado R, Sevivas T, Catarino C, Ribeiro ML. VWF collagen (types III and VI)-binding defects in a cohort of type 2M VWD patients - a strategy for improvement of a challenging diagnosis. Haemophilia 2017; 23:e143-e147. [PMID: 28083987 DOI: 10.1111/hae.13156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/18/2016] [Indexed: 11/28/2022]
Affiliation(s)
- T Fidalgo
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - A Oliveira
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - C Silva Pinto
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - P Martinho
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - G Ferreira
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - R Salvado
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - T Sevivas
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - C Catarino
- Immunohemotherapy Department, Hospital de Santa Maria-Centro Hospitalar Lisboa Norte, Lisbon, Portugal
| | - M L Ribeiro
- Serviço de Hematologia Clínica, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
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Del Orbe Barreto R, Arrizabalaga B, De la Hoz AB, García-Orad Á, Tejada MI, Garcia-Ruiz JC, Fidalgo T, Bento C, Manco L, Ribeiro ML. Detection of new pathogenic mutations in patients with congenital haemolytic anaemia using next-generation sequencing. Int J Lab Hematol 2016; 38:629-638. [PMID: 27427187 DOI: 10.1111/ijlh.12551] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 06/07/2016] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Congenital haemolytic anaemia (CHA) refers to a group of genetically heterogeneous disorders, mainly caused by changes in genes encoding globin chains, cytoskeletal proteins and red cell enzymes, in which accurate diagnosis can be challenging with conventional techniques. METHODS To set-up a comprehensive assay for detecting mutations that could improve aetiological diagnosis, we designed a custom panel for sequencing coding regions from 40 genes known to be involved in the pathogenesis of CHA, using the Ion Torrent™ (Thermo Fisher Scientific, S.L. Waltham, MA, USA) Personal Genome Machine (PGM) Sequencer. A control group of 16 samples with previously known mutations and a test group of 10 patients with unknown mutations were included for assay validation and application, respectively. RESULTS In the test group, we identified pathogenic mutations in all cases: four patients had novel mutations in genes related to membrane defects (SPTB, ANK1, SLC4A1 and EPB41), four were homozygous or compound heterozygous for mutations in genes related to enzyme deficiencies (GPI, TPI1 and GSS), one had a mutation in the HBB gene and another presented a homozygous mutation in the ADAMTS13 gene. CONCLUSIONS Ion PGM sequencing with our custom panel is a highly efficient way to detect mutations causing haemolytic anaemia, including new variations. It is a high-throughput detection method that is ready for application in clinical laboratories.
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Affiliation(s)
| | - B Arrizabalaga
- BioCruces Health Research Institute, Barakaldo, Spain.,Department of Haematology, Cruces University Hospital, Barakaldo, Spain
| | - A B De la Hoz
- BioCruces Health Research Institute, Barakaldo, Spain
| | - Á García-Orad
- BioCruces Health Research Institute, Barakaldo, Spain.,Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - M I Tejada
- BioCruces Health Research Institute, Barakaldo, Spain.,Molecular Genetics Laboratory, Genetics Service, Cruces University Hospital, Barakaldo, Spain
| | - J C Garcia-Ruiz
- BioCruces Health Research Institute, Barakaldo, Spain.,Department of Haematology, Cruces University Hospital, Barakaldo, Spain
| | - T Fidalgo
- Serviço de Hematologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - C Bento
- Serviço de Hematologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - L Manco
- Research Centre for Anthropology and Health (CIAS), Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - M L Ribeiro
- Serviço de Hematologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
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Del Orbe Barreto R, Arrizabalaga B, de la Hoz AB, Aragües P, Garcia-Ruiz JC, Arrieta A, Adán R, Manco L, Macedo-Ribeiro S, Bento C, Ribeiro ML. Severe neonatal jaundice due to a de novo glucose-6-phosphate dehydrogenase deficient mutation. Int J Lab Hematol 2015; 38:e27-9. [PMID: 26693676 DOI: 10.1111/ijlh.12455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
| | - B Arrizabalaga
- BioCruces Health Research Institute, Barakaldo, Spain.,Servicio de Hematología, Hospital Universitario Cruces, Barakaldo, Spain
| | - A B de la Hoz
- BioCruces Health Research Institute, Barakaldo, Spain
| | - P Aragües
- Servicio de Hematología, Hospital Universitario Cruces, Barakaldo, Spain
| | - J C Garcia-Ruiz
- BioCruces Health Research Institute, Barakaldo, Spain.,Servicio de Hematología, Hospital Universitario Cruces, Barakaldo, Spain
| | - A Arrieta
- Servicio de Inmunología, Hospital Universitario Cruces, Barakaldo, Spain
| | - R Adán
- Servicio de Pediatría, Hospital Universitario Cruces, Barakaldo, Spain
| | - L Manco
- Serviço de Hematologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal.,CIAS/Departamento de Ciências da Vida, Universidade de Coimbra, Coimbra, Portugal
| | - S Macedo-Ribeiro
- Protein Crystallography Group, Institute for Molecular and Cell Biology (IBMC), Universidade do Porto, Porto, Portugal
| | - C Bento
- Serviço de Hematologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - M L Ribeiro
- Serviço de Hematologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
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Beltrame JS, Sordelli MS, Cella M, Perez Martinez S, Franchi AM, Ribeiro ML. Lysophosphatidic acid increases the production of pivotal mediators of decidualization and vascularization in the rat uterus. Placenta 2013; 34:751-6. [PMID: 23790320 DOI: 10.1016/j.placenta.2013.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 05/10/2013] [Accepted: 06/04/2013] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The decidual reaction and the formation of new vessels in the uterus are two crucial processes during embryo implantation. Previously, we observed that lysophosphatidic acid (LPA) increases cyclooxygenase-2 derived - prostaglandin E2 production during implantation in the rat uterus and that it augments the expression of decidualization (IGFBP-1) and vascularization (IL-10) markers. Both cyclooxygenase and nitric oxide synthase (NOS) are known enzymes involved in these processes. Thus, we became interested in studying which factors contribute to LPA receptor-specific role during the decidual and the vascular reaction at implantation. METHODS We adopted a pharmacological approach in vitro incubating the uterus from rats on day 5 of gestation (day of implantation) with LPA, DGPP (a highly selective antagonist of LPA3, an LPA receptor) and cyclooxygenase and NOS selective and non-selective inhibitors. We determined NOS activity, prostaglandin E2 production and IGFBP-1 and IL-10 expression to evaluate decidualization and vascularization. RESULTS We observed that LPA augmented the activity of the inducible NOS isoform through LPA1/LPA3. Inducible NOS activity participated in the induction of cyclooxygenase-2/prostaglandin E2 increase stimulated by LPA. Also, cyclooxygenase-2 derived prostaglandins mediated LPA-stimulatory action on NOS activity. Both cyclooxygenase-2 and inducible NOS mediated LPA effect on IGFBP-1 and IL-10 expression. CONCLUSIONS These results suggest the participation of LPA/LPA3 in the production of crucial molecules involved in vascularization and decidualization, two main processes that prepare the uterine milieu for embryo invasion during implantation.
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Affiliation(s)
- J S Beltrame
- Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO CONICET - UBA, Buenos Aires, Argentina
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Sordelli MS, Beltrame JS, Cella M, Gervasi MG, Perez Martinez S, Burdet J, Zotta E, Franchi AM, Ribeiro ML. Interaction between lysophosphatidic acid, prostaglandins and the endocannabinoid system during the window of implantation in the rat uterus. PLoS One 2012; 7:e46059. [PMID: 23029388 PMCID: PMC3460956 DOI: 10.1371/journal.pone.0046059] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 08/27/2012] [Indexed: 11/30/2022] Open
Abstract
Bioactive lipid molecules as lysophosphatidic acid (LPA), prostaglandins (PG) and endocannabinoids are important mediators of embryo implantation. Based on previous published data we became interested in studying the interaction between these three groups of lipid derivatives in the rat uterus during the window of implantation. Thus, we adopted a pharmacological approach in vitro using LPA, DGPP (a selective antagonist of LPA3, an LPA receptor), endocannabinoids’ receptor selective antagonists (AM251 and AM630) and non selective (indomethacin) and selective (NS-398) inhibitors of cyclooxygenase-1 and 2 enzymes. Cyclooxygenase isoforms participate in prostaglandins’ synthesis. The incubation of the uterus from rats pregnant on day 5 of gestation (implantation window) with LPA augmented the activity and the expression of fatty acid amide hydrolase, the main enzyme involved in the degradation of endocannabinoids in the rodent uteri, suggesting that LPA decreased endocannabinoids’ levels during embryo implantation. It has been reported that high endocannabinoids are deleterious for implantation. Also, LPA increased PGE2 production and cyclooxygenase-2 expression. The incubation of LPA with indomethacin or NS-398 reversed the increment in PGE2 production, suggesting that cyclooxygenase-2 was the isoform involved in LPA effect. PGs are important mediators of decidualization and vascularization at the implantation sites. All these effects were mediated by LPA3, as the incubation with DGPP completely reversed LPA stimulatory actions. Besides, we also observed that endocannabinoids mediated the stimulatory effect of LPA on cyclooxygenase-2 derived PGE2 production, as the incubation of LPA with AM251 or AM630 completely reversed LPA effect. Also, LPA augmented via LPA3 decidualization and vascularization markers. Overall, the results presented here demonstrate the participation of LPA3 in the process of implantation through the interaction with other groups of lipid molecules, prostaglandins and endocannabinoids, which prepare the uterine milieu for embryo invasion during the window of implantation.
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Affiliation(s)
- Micaela S. Sordelli
- Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO (CONICET – Facultad de Medicina, Universidad de Buenos Aires (UBA)), Buenos Aires, Argentina
| | - Jimena S. Beltrame
- Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO (CONICET – Facultad de Medicina, Universidad de Buenos Aires (UBA)), Buenos Aires, Argentina
| | - Maximiliano Cella
- Laboratorio de Fisiopatología de la Preñez y el Parto, CEFYBO (CONICET – Facultad de Medicina, UBA), Buenos Aires, Argentina
| | - María Gracia Gervasi
- Laboratorio de Biología de la Reproducción en Mamíferos, CEFYBO (CONICET – Facultad de Medicina, UBA), Buenos Aires, Argentina
| | - Silvina Perez Martinez
- Laboratorio de Biología de la Reproducción en Mamíferos, CEFYBO (CONICET – Facultad de Medicina, UBA), Buenos Aires, Argentina
| | - Juliana Burdet
- Laboratorio de Fisiopatología Molecular (Cátedra de Fisiopatología, Departamento de Cs. Biológicas, Facultad de Farmacia y Bioquıímica, UBA), Buenos Aires, Argentina
| | - Elsa Zotta
- Laboratorio de Fisiopatología Molecular (Cátedra de Fisiopatología, Departamento de Cs. Biológicas, Facultad de Farmacia y Bioquıímica, UBA), Buenos Aires, Argentina
| | - Ana M. Franchi
- Laboratorio de Fisiopatología de la Preñez y el Parto, CEFYBO (CONICET – Facultad de Medicina, UBA), Buenos Aires, Argentina
| | - María Laura Ribeiro
- Laboratorio de Fisiología y Farmacología de la Reproducción, CEFYBO (CONICET – Facultad de Medicina, Universidad de Buenos Aires (UBA)), Buenos Aires, Argentina
- * E-mail:
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Osycka-Salut C, Gervasi MG, Pereyra E, Cella M, Ribeiro ML, Franchi AM, Perez-Martinez S. Anandamide induces sperm release from oviductal epithelia through nitric oxide pathway in bovines. PLoS One 2012; 7:e30671. [PMID: 22363468 PMCID: PMC3281848 DOI: 10.1371/journal.pone.0030671] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 12/20/2011] [Indexed: 11/19/2022] Open
Abstract
Mammalian spermatozoa are not able to fertilize an egg immediately upon ejaculation. They acquire this ability during their transit through the female genital tract in a process known as capacitation. The mammalian oviduct acts as a functional sperm reservoir providing a suitable environment that allows the maintenance of sperm fertilization competence until ovulation occurs. After ovulation, spermatozoa are gradually released from the oviductal reservoir in the caudal isthmus and ascend to the site of fertilization. Capacitating-related changes in sperm plasma membrane seem to be responsible for sperm release from oviductal epithelium. Anandamide is a lipid mediator that participates in the regulation of several female and male reproductive functions. Previously we have demonstrated that anandamide was capable to release spermatozoa from oviductal epithelia by induction of sperm capacitation in bovines. In the present work we studied whether anandamide might exert its effect by activating the nitric oxide (NO) pathway since this molecule has been described as a capacitating agent in spermatozoa from different species. First, we demonstrated that 1 µM NOC-18, a NO donor, and 10 mM L-Arginine, NO synthase substrate, induced the release of spermatozoa from the oviductal epithelia. Then, we observed that the anandamide effect on sperm oviduct interaction was reversed by the addition of 1 µM L-NAME, a NO synthase inhibitor, or 30 µg/ml Hemoglobin, a NO scavenger. We also demonstrated that the induction of bull sperm capacitation by nanomolar concentrations of R(+)-methanandamide or anandamide was inhibited by adding L-NAME or Hemoglobin. To study whether anandamide is able to produce NO, we measured this compound in both sperm and oviductal cells. We observed that anandamide increased the levels of NO in spermatozoa, but not in oviductal cells. These findings suggest that anandamide regulates the sperm release from oviductal epithelia probably by activating the NO pathway during sperm capacitation.
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Affiliation(s)
- Claudia Osycka-Salut
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO-CONICET), Buenos Aires, Argentina
| | - María Gracia Gervasi
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO-CONICET), Buenos Aires, Argentina
| | - Elba Pereyra
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO-CONICET), Buenos Aires, Argentina
| | - Maximiliano Cella
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO-CONICET), Buenos Aires, Argentina
| | - María Laura Ribeiro
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO-CONICET), Buenos Aires, Argentina
| | - Ana María Franchi
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO-CONICET), Buenos Aires, Argentina
| | - Silvina Perez-Martinez
- Centro de Estudios Farmacológicos y Botánicos (CEFYBO-CONICET), Buenos Aires, Argentina
- * E-mail:
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14
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Andrade HM, Toledo VPCP, Pinheiro MB, Guimarães TMPD, Oliveira NC, Castro JA, Silva RN, Amorim AC, Brandão RMSS, Yoko M, Silva AS, Dumont K, Ribeiro ML, Bartchewsky W, Monte SJH. Evaluation of miltefosine for the treatment of dogs naturally infected with L. infantum (=L. chagasi) in Brazil. Vet Parasitol 2011; 181:83-90. [PMID: 21641721 DOI: 10.1016/j.vetpar.2011.05.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 05/06/2011] [Accepted: 05/09/2011] [Indexed: 11/30/2022]
Abstract
Dogs naturally infected with Leishmania Infantum (=L. chagasi) were treated with miltefosine using different therapeutic regimens. The animals were evaluated for clinical evolution, biochemical parameters, parasite load (by real-time PCR), cytokine levels and humoral response. After treatment and during the following 24 months, there was progressive clinical improvement and complete recovery in 50% (7/14) of the treated animals. There was a decrease in the smear positivity of the bone marrow after treatment, and there was also a gradual and constant decrease in positive cultures at the end of the follow-up period. However, the PCR detection of parasite DNA remained positive. In general, all animals presented a significant increase in parasite load 6 months after treatment. The IFN-γ levels in all the groups tended to increase during follow-up period, regardless of the miltefosine dose administered. The IL-4 and IL-10 levels of the animals tended to decrease during follow-up, except after 300 days when only IL-10 increased. The serum antibodies identified antigens that ranged from 116 kDa to less than 29 kDa in the Western blot assay. Furthermore, 300 days after treatment, qualitative and quantitative differences in the antigen profiles were observed. Antigens of 97 and 46 kDa were the most intensely recognized. Higher levels of antigen-specific Leishmania IgG were detected before and 300 days after treatment in all groups. Taking together, the improvement in the clinical symptoms was not followed by parasitological clearance, suggesting that treatment with miltefosine is not recommended, especially in endemic areas like Brazil, where children are the major victims and dogs are involved in the maintenance of the parasite cycle.
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Affiliation(s)
- H M Andrade
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, Belo Horizonte, MG, Brazil.
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15
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Santos RA, Nogueira CS, Granja S, Baptista JB, Ribeiro ML, Rocha MG. Kawasaki disease and human bocavirus--potential association? J Microbiol Immunol Infect 2011; 44:235-7. [PMID: 21524620 DOI: 10.1016/j.jmii.2011.01.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2009] [Revised: 12/04/2010] [Accepted: 12/05/2010] [Indexed: 11/25/2022]
Abstract
Kawasaki disease (KD) is an acute febrile multisystem vasculitic syndrome of unknown etiology, occurring mostly in infants and children younger than 5 years of age. We present a 13-month-old male with KD from whom was found human bocavirus DNA in nasopharyngeal secretions. Human bocavirus DNA in a patient with KD raised question about the coincidental or possible etiological association.
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Affiliation(s)
- R A Santos
- Pediatric Hospital of Coimbra, Avenida Bissaya Barreto, Coimbra, Portugal
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16
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Cella M, Farina MG, Dominguez Rubio AP, Di Girolamo G, Ribeiro ML, Franchi AM. Dual effect of nitric oxide on uterine prostaglandin synthesis in a murine model of preterm labour. Br J Pharmacol 2010; 161:844-55. [PMID: 20860663 PMCID: PMC2992899 DOI: 10.1111/j.1476-5381.2010.00911.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 04/20/2010] [Accepted: 05/17/2010] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Maternal infections are one of the main causes of adverse developmental outcomes including embryonic resorption and preterm labour. In this study a mouse model of inflammation-associated preterm delivery was developed, and used to study the relationship between nitric oxide (NO) and prostaglandins (PGs). EXPERIMENTAL APPROACH The murine model of preterm labour was achieved by assaying different doses of bacterial lipopolysaccharides (LPS). Once established, it was used to analyse uterine levels of prostaglandins E(2) and F(2α) (by radioimmunoassay), cyclooxygenases (COX) and NOS proteins (by Western blot) and NO synthase (NOS) activity. Effects of inhibitors of COX and NOS on LPS-induced preterm labour were also studied. In vitro assays with a nitric oxide donor (SNAP) were performed to analyse the modulation of prostaglandin production by NO. KEY RESULTS Lipopolysaccharide increased uterine NO and PG synthesis and induced preterm delivery. Co-administration of meloxicam, a cyclooxygenase-2 inhibitor, or aminoguanidine, an inducible NOS inhibitor, prevented LPS-induced preterm delivery and blocked the increase in PGs and NO. Notably, the levels of NO were found to determine its effect on PG synthesis; low concentrations of NO reduced PG synthesis whereas high concentrations augmented them. CONCLUSIONS AND IMPLICATIONS An infection-associated model of preterm labour showed that preterm delivery can be prevented by decreasing PG or NO production. NO was found to have a dual effect on PG synthesis depending on its concentration. These data contribute to the understanding of the interaction between NO and PGs in pregnancy and parturition, and could help to improve neonatal outcomes.
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Affiliation(s)
- M Cella
- Laboratory of Physiopathology of Pregnancy and Labor, Center for Pharmacological and Botanical Studies (National Research Council - School of Medicine, University of Buenos Aires), Buenos Aires, Argentina.
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17
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da Silva RN, Amorim AC, Brandão RMSS, de Andrade HM, Yokoo M, Ribeiro ML, Bartchewsky W, Socorro-Silva A, de Castro JAF, do Monte SJH. Real-time PCR in clinical practice: a powerful tool for evaluating Leishmania chagasi loads in naturally infected dogs. Ann Trop Med Parasitol 2010; 104:137-43. [PMID: 20406580 DOI: 10.1179/136485910x12647085215453] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The performance of the less expensive SYBR-Green-based PCR assay, for quantifying Leishmania chagasi in smears of bone-marrow aspirates from naturally infected, mongrel dogs, was recently compared with that of a similar PCR based on TaqMan chemistry. Aspirates were obtained from 36 infected dogs and examined for parasites by direct examination, culture, and quantitative PCR (qPCR) using specific primers (based on the parasite's kinetoplast DNA), DNA extracted from a smear, and either the SYBR-Green or TaqMan chemistries. Every aspirate smear was found PCR-positive for L. chagasi (whether the assay employed SYBR Green or TaqMan) but only 74% of the aspirates were found positive by culture and only 33% by direct, microscopical examination. There was no evidence of PCR inhibition when the DNA was collected from smears, and the parasite loads estimated using the SYBR-Green PCR were almost identical to those estimated using the TaqMan PCR (r=0.99). As a method for quantifying parasite loads in dogs infected with L. chagasi (and, probably, other mammals infected with other leishmanial parasites), PCR based on SYBR Green may therefore be an appropriate and inexpensive alternative to PCR based on TaqMan, and a reliable clinical tool.
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Affiliation(s)
- R N da Silva
- Departamento de Parasitologia e Microbiologia, Centro de Ciências da Saúde, Universidade Federal do Piauí, Teresina, PI, Brazil
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18
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Aisemberg J, Vercelli C, Wolfson M, Salazar AI, Osycka-Salut C, Billi S, Ribeiro ML, Farina M, Franchi AM. Inflammatory agents involved in septic miscarriage. Neuroimmunomodulation 2010; 17:150-2. [PMID: 20134189 DOI: 10.1159/000258710] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Even though the understanding of the cause of early pregnancy loss due to chromosomal abnormalities has improved, there is a dearth of knowledge of the causes of loss in euploid conceptuses. Maternal infections are a cause of abort in humans, but the mechanisms are not clear, so we have developed a murine model to study the mechanism of septic abortion by inducing embryonic resorption (ER) with lipopolysaccharide (LPS). We demonstrated that augmented production of nitric oxide (NO) and prostaglandins (PG) is involved in ER, and that inhibitors of their synthesis could prevent ER. Also, we observed an increase in the oxidative damage, evidenced by nitration of tyrosine proteins, due to the peroxynitrite anion. Since an association between chronic marijuana smoking and early miscarriage has been shown in women, we studied the participation of anandamide (AEA), the principal endocannabinoid, on the mechanism of action of LPS. We showed that LPS-induced NO synthesis and tissue damage were mediated by AEA, and that this endotoxin inhibited AEA degradation and increased its synthesis. These results suggest that several inflammatory molecules participate in the mechanism of early pregnancy loss and that their modulation could be useful tools to prevent it.
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Affiliation(s)
- Julieta Aisemberg
- Laboratory of Physiopathology of Pregnancy and Labor--Center for Pharmacological and Botanical Studies (CEFYBO, CONICET), School of Medicine, University of Buenos Aires, Buenos Aires, Argentina
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19
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Vercelli CA, Aisemberg J, Billi S, Cervini M, Ribeiro ML, Farina M, Franchi AM. Anandamide regulates lipopolysaccharide-induced nitric oxide synthesis and tissue damage in the murine uterus. Reprod Biomed Online 2009; 18:824-31. [PMID: 19490788 DOI: 10.1016/s1472-6483(10)60033-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In women, the association between chronic marijuana smoking and early miscarriage has long been known. Anandamide, a major endocannabinoid, mimics some of the psychotropic, hypnotic and analgesic effects of Delta(9)-tetrahydrocannabinol, the psychoactive component of marijuana. The uterus contains the highest concentrations of anandamide yet discovered in mammalian tissues and this suggests that it might play a role in reproduction. The production of small amounts of nitric oxide (NO) regulates various physiological events including implantation and myometrial relaxation, but in an inflammatory setting such as sepsis, NO has toxic effects as it is a free radical. The results presented in this study indicate that anandamide modulates NO production induced by lipopolysaccharide (LPS) in an in-vitro murine model. It was shown that LPS-induced NO synthesis and tissue damage were mediated by anandamide, as a cannabinoid receptor type I antagonist could block the effect of LPS (P < 0.001). This endotoxin inhibited anandamide uterine degradation (P < 0.05) and increased the expression of one of its synthesizing enzymes (P < 0.05). Contrary to the known anti-inflammatory and protective effects, in this model anandamide seems to act as a pro-inflammatory molecule modulating the production of NO induced by LPS. This proinflammatory effect of anandamide may be implicated in pathological reproductive events such as septic abortion.
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Affiliation(s)
- C A Vercelli
- Laboratory of Physiopathology of Pregnancy and Labour, Centre for Pharmacological and Botanical Studies, Paraguay 2155, Buenos Aires, Argentina.
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20
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Pereira JC, Martins NP, Ribeiro ML. Novel human pathological mutations. Gene symbol: RHD. Disease: Rhesus negative blood group. Hum Genet 2009; 126:332. [PMID: 19693998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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21
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Pereira JC, Barbot J, Ribeiro ML. Novel human pathological mutations. Gene symbol: ALAS2. Disease: sideroblastic anaemia. Hum Genet 2009; 126:333. [PMID: 19693999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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22
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Gervasi MG, Rapanelli M, Ribeiro ML, Farina M, Billi S, Franchi AM, Martinez SP. The endocannabinoid system in bull sperm and bovine oviductal epithelium: role of anandamide in sperm–oviduct interaction. Reproduction 2009; 137:403-14. [DOI: 10.1530/rep-08-0204] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Anandamide binds to cannabinoid receptors and plays several central and peripheral functions. The aim of this work was to study the possible role for this endocannabinoid in controlling sperm–oviduct interaction in mammals. We observed that bull sperm and bovine oviductal epithelial cells express cannabinoid receptors, CB1 and CB2, and fatty acid amide hydrolase, the enzyme that controls intracellular anandamide levels. A quantitative assay to determine whether anandamide was involved in bovine sperm–oviduct interaction was developed. R(+)-methanandamide, a non-hydrolysable anandamide analog, inhibited sperm binding to and induced sperm release from oviductal epithelia. Selective CB1 antagonists (SR141716A or AM251) completely blocked R(+)-methanandamide effects. However, SR144528, a selective CB2 antagonist, did not exert any effect, indicating that only CB1 was involved in R(+)-methanandamide effect. This effect was not caused by inhibition of the sperm progressive motility or by induction of the acrosome reaction. Overall, our findings indicate for the first time that the endocannabinoid system is present in bovine sperm and oviductal epithelium and that anandamide modulates the sperm–oviduct interaction, by inhibition of sperm binding and induction of sperm release from oviductal epithelial cells, probably by activating CB1 receptors.
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23
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Bartchewsky W, Martini MR, Squassoni AC, Alvarez MC, Ladeira MSP, Salvatore DMF, Trevisan MA, Pedrazzoli J, Ribeiro ML. Influence of Helicobacter pylori infection on the expression of MLH1 and MGMT in patients with chronic gastritis and gastric cancer. Eur J Clin Microbiol Infect Dis 2008; 28:591-7. [PMID: 19089477 DOI: 10.1007/s10096-008-0676-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Accepted: 11/22/2008] [Indexed: 01/04/2023]
Abstract
The aim of the present study was to evaluate the influence of Helicobacter pylori on MLH1 and MGMT mRNA levels in patients with chronic gastritis and gastric cancer. The study included 217 patients, of which 26 were uninfected, 127 had chronic gastritis and were H. pylori-positive, and 64 had gastric cancer. Bacterial genotypes were evaluated by polymerase chain reaction (PCR), and the expression levels of MLH1 and MGMT were determined by quantitative real-time PCR and immunohistochemistry. There was an association between infection with cagA, vacA s1m1 strains and gastric cancer development. When the gastric epithelium and associated inflammation were examined for expression of MLH1 and MGMT, an overall increase in expression was observed. On the other hand, these levels decrease significantly among gastric cancer patients. The loss of MLH1 and MGMT expression in gastric cancer patients suggests that it is not an early event in H. pylori-associated gastric carcinogenesis.
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Affiliation(s)
- W Bartchewsky
- Unidade Integrada de Farmacologia e Gastroenterologia, Universidade São Francisco, Av. São Francisco de Assis, 218. Jd. São José, Bragança Paulista, SP, Brazil
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24
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Cella M, Leguizamón GF, Sordelli MS, Cervini M, Guadagnoli T, Ribeiro ML, Franchi AM, Farina MG. Dual effect of anandamide on rat placenta nitric oxide synthesis. Placenta 2008; 29:699-707. [PMID: 18561998 DOI: 10.1016/j.placenta.2008.05.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 05/05/2008] [Accepted: 05/07/2008] [Indexed: 10/21/2022]
Abstract
Anandamide (AEA) has been reported to have pleiotropic effects on reproduction, but the mechanism by which it exerts these effects is unclear. The aim of this study is to characterize rat placental endocannabinoid system and to analyze the possible functional role of AEA in the regulation of NO levels in rat placenta during pregnancy. We found that cannabinoids receptors (CB1 and CB2), FAAH and TRPV1 were expressed in chorio-allantoic placenta. NOS activity peaked at day 13 and decreased with progression of pregnancy. Both exogenous and endogenous AEA significantly decreased NOS activity. Although pre-incubation with AM251 (CB1 antagonist) or AM630 (CB2 antagonist) had no effect, co-incubation with both antagonists induced NOS activity. Furthermore, pre-incubation with exogenous AEA and both antagonists resulted in the induction of placental NOS activity and this effect was reverted with capsazepine (selective TRPV1 antagonist). Additionally, the enhanced NO synthesis caused by capsaicin was abrogated by co-treatment with capsazepine, illustrating that NOS activity could be modulated by TRPV1. Finally, the inhibition of TRPV1 receptor by capsazepine caused a significant fall in NOS activity. These data support the concept that AEA modulates NO levels by two independent pathways: (1) diminishing the NOS activity via CBs; and (2) stimulating NO synthesis via TRPV1. We hypothesized that AEA have an important implication in the normal function of placental tissues.
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Affiliation(s)
- M Cella
- Laboratory of Physiopathology of Pregnancy and Labor - CEFYBO, School of Medicine, (National Research Council - University of Buenos Aires), Paraguay 2155, C1121ABG Buenos Aires, Argentina.
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25
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Pereira J, Couceiro AB, Ribeiro ML. Gene symbol: RHD. Disease: Rhesus negative blood group. Hum Genet 2008; 123:107. [PMID: 18386336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Janet Pereira
- Centro Hospitalar de Coimbra, EPE, Unidade Hematologia Molecular, 3000-076 Coimbra, Portugal.
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26
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Ortiz RAM, Calafatti SA, Moraes LA, Deguer M, Ecclissato CC, Marchioretto MAM, Ribeiro ML, Bernasconi G, Pedrazzoli J. Effect of Helicobacter pylori infection and acid blockade by lansoprazole on clarithromycin bioavailability. ACTA ACUST UNITED AC 2008; 40:383-9. [PMID: 17334536 DOI: 10.1590/s0100-879x2007000300014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2005] [Accepted: 12/06/2006] [Indexed: 11/22/2022]
Abstract
The effect of proton pump inhibitors and Helicobacter pylori infection on the bioavailability of antibiotics is poorly understood. We determined the effects of 5-day oral administration of 60 mg lansoprazole on the bioavailability of clarithromycin in individuals with and without H. pylori infection. Thirteen H. pylori-infected and 10 non-infected healthy volunteers were enrolled in a study with an open-randomized two-period crossover design and a 21-day washout period between phases. Plasma concentrations of clarithromycin in subjects with and without lansoprazole pre-treatment were measured by liquid chromatography coupled to a tandem mass spectrometer. Clarithromycin Cmax and AUC0-10 h were significantly reduced after lansoprazole administration. In addition, lansoprazole treatment of the H. pylori-positive group resulted in a statistically significant greater reduction in Cmax (40 vs 15%) and AUC0-10 h (30 vs 10%) compared to lansoprazole-treated H. pylori-negative subjects. Thus, treatment with lansoprazole for 5 days reduced bioavailability of clarithromycin, irrespective of H. pylori status. This reduction, however, was even more pronounced in H. pylori-infected individuals.
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Affiliation(s)
- R A M Ortiz
- Unidade Integrada de Farmacologia e Gastroenterologia, Universidade São Francisco, Av. São Francisco de Assis 218, 12916-900 Bragança Paulista, SP, Brazil
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27
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Pereira J, Molinés A, Ribeiro ML. Human gene mutations. Gene symbol: RPS19. Disease: Diamond-Blackfan anaemia. Hum Genet 2007; 122:213. [PMID: 18386370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Janet Pereira
- Centro Hospitalar de Coimbra, Unidade de Hematologia Molecular, 3000-076, Coimbra, Portugal
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28
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Pereira J, Sznajer Y, Ribeiro ML. Human gene mutations. Gene symbol: RPS19. Disease: Diamond-Blackfan anaemia. Hum Genet 2007; 122:213. [PMID: 18386371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Janet Pereira
- Centro Hospitalar de Coimbra, Unidade de Hematologia Molecular, 3000-076, Coimbra, Portugal
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29
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Manco L, Ribeiro ML. Novel human pathological mutations. Gene symbol: TPI1. Disease: triosephosphate isomerase deficiency. Hum Genet 2007; 121:650. [PMID: 17879449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Affiliation(s)
- L Manco
- Department of Anthropology, University of Coimbra, Portugal.
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30
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Manco L, Ribeiro ML. Novel human pathological mutations. Gene symbol: G6PD. Disease: glucose-6-phosphate dehydrogenase deficiency. Hum Genet 2007; 121:646. [PMID: 17879434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Affiliation(s)
- L Manco
- Departamento de Antropologia, Universidade de Coimbra, Portugal.
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31
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Miranda DDC, Arçari DP, Ladeira MSP, Calori-Domingues MA, Romero AC, Salvadori DMF, Gloria EM, Pedrazzoli J, Ribeiro ML. Analysis of DNA damage induced by aflatoxin B1 in Dunkin–Hartley guinea pigs. Mycopathologia 2007; 163:275-80. [PMID: 17429758 DOI: 10.1007/s11046-007-9014-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2007] [Accepted: 03/22/2007] [Indexed: 10/23/2022]
Abstract
Aflatoxin B1 (AFB1) is among the most potent naturally occurring carcinogens and classified as a group I carcinogen. Since the ingestion of aflatoxin-contaminated food is associated with several liver diseases, the aim of the present study was to evaluate the effect of 2, 20, and 200 ppb of AFB1 on DNA damage in peripheral blood lymphocytes and liver cells in Dunkin-Hartley guinea pigs. The animals were divided into four groups according to the given diet. After the treatment the lymphocytes and liver cells were isolated and DNA damage determined by Comet assay. The levels of DNA damage in lymphocytes were higher animals treated with 200 ppb of AFB1-enriched diet (P = 0.02). In the liver cells there were a relationship between the levels of DNA damage and the consumption of AFB1 in all studied groups. These results suggest that Comet assay performed on lymphocytes is a valuable genotoxic marker for high levels of exposure to AFB1 in guinea pig. Additionally our results indicate that the exposure to this toxin increases significantly and increases the level of DNA damage in liver cells, which is a key step on liver cancer development. We also suggest that the Comet assay is an useful tool for monitoring the genotoxicity of AFB1 in liver.
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Affiliation(s)
- D D C Miranda
- Unidade Integrada de Farmacologia e Gastroenterologia, Universidade São Francisco, Av. São Francisco de Assis, 218. Jd. São José, Braganca Paulista, SP, ZIP Code 12916-900, Brazil
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Pérez Martínez S, Hermoso M, Farina M, Ribeiro ML, Rapanelli M, Espinosa M, Villalón M, Franchi A. 17-β-Estradiol upregulates COX-2 in the rat oviduct. Prostaglandins Other Lipid Mediat 2006; 80:155-64. [PMID: 16939880 DOI: 10.1016/j.prostaglandins.2006.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2006] [Revised: 05/30/2006] [Accepted: 06/06/2006] [Indexed: 11/16/2022]
Abstract
We investigated the regulation of cyclooxygenase-2 (COX-2) by 17-beta-estradiol (E2) in the rat oviduct. We observed that COX-2 is expressed mainly in proestrous and estrous stages, periods under estrogenic influence. While exogenous administration of E2 (1 microg/rat) significantly increased COX-2 protein levels, progesterone did not modify it. COX-2 was mainly localized on oviductal epithelial cells from estrogenized rat. Induction of COX-2 expression by E2 was partially reverted by tamoxifen (1 mg/rat), an E2 receptor antagonist. Estradiol treatment also increased prostaglandins (PGs) synthesis: 6-keto-PGF(1alpha) (40%), a stable metabolite of prostacyclin (PGI2), PGF(2alpha) (40%) and PGE2 (50%). Tamoxifen completely suppressed this enhancement. In order to discriminate which isoform of COX was implicated in the stimulatory effect of E2 on PGs synthesis, oviducts were preincubated with meloxicam (Melo: 10(-9)M) or NS-398 (10(-7)M), two selective COX-2 inhibitors. Both Melo and NS-398 abolished the increase of PGs synthesis stimulated by E2. All together, these data indicate that E2 could upregulate COX-2 expression and activity in the rat oviduct and that the stimulatory effect of E2 may be receptor-mediated.
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Affiliation(s)
- S Pérez Martínez
- Laboratory of Physiopathology of Pregnancy and Labor, Center for Pharmacological and Botanical Studies (CEFYBO, CONICET-UBA), Paraguay 2155, CP (C1121ABG), Buenos Aires, Argentina.
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33
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Farina MG, Billi S, Sordelli MS, Ribeiro ML, Di Girolamo G, Lombardi E, Franchi AM. Nitric oxide (NO) inhibits prostaglandin E2 9-ketoreductase (9-KPR) activity in human fetal membranes. Prostaglandins Other Lipid Mediat 2006; 79:260-70. [PMID: 16647639 DOI: 10.1016/j.prostaglandins.2006.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Revised: 02/09/2006] [Accepted: 02/20/2006] [Indexed: 10/24/2022]
Abstract
Nitric oxide (NO) synthesized by fetal membranes may act either directly inhibiting myometrium contractility or indirectly interacting with tocolytic agents as prostaglandins (PGs). Here we examined if NO could modulate prostaglandin E(2) 9-ketoreductase (9-KPR) activity in human fetal membranes (HFM). 9-KPR is the enzyme that converts PGE(2) into PGF(2alpha), the main PGs known to induce uterine contractility at term. Chorioamnion explants obtained from elective caesareans were incubated with aminoguanidine (AG), an iNOS inhibitor, or NOC-18, a NO donor. NOC-18 (2mM) increased PGE(2) production and diminished PGF(2alpha) synthesis in HFM. AG presented the opposite effect. When we evaluated the activity of 9-KPR by the conversion of [(3)H]-PGE(2) into [(3)H]-PGF(2alpha) and 13,14-dihidro-15-keto prostaglandin F(2alpha) (the PGF(2alpha) metabolite), we found that NOC-18 inhibited 9-KPR activity. Interestingly, AG did not elicit any effect on 9-KPR but l-NAME, a non-selective NOS inhibitor, significantly increased its activity. Our data suggests that exogenous NO inhibits 9-KPR activity in HFM, thus modulating the synthesis of important labor mediators as PGF(2alpha).
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Affiliation(s)
- M G Farina
- Center for Pharmacological and Botanical Studies (CEFYBO, CONICET), Laboratory of Physiopathology of Pregnancy and Labor, Paraguay 2155, C1121ABG Buenos Aires, Argentina.
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34
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Manco L, Pereira J, Bento MC, Ribeiro ML. Gene symbol: NT5C3. Disease: haemolytic anemia. Hum Genet 2006; 118:534. [PMID: 16402212 DOI: 10.1007/s00439-005-0040-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- L Manco
- Unidad de Hematologia Molecular, Hospital Pediátrico de Coimbra, Portugal.
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35
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Ribeiro ML, Farina M, Billi S, Pérez Martínez S, Brañes MC, Villalón M, Franchi A. Effect of in vivo administration of epidermal growth factor on prostaglandin production and NOS activity in term rat placentae. Possible participation of placental EGF receptors. Placenta 2005; 26:758-65. [PMID: 16226126 DOI: 10.1016/j.placenta.2004.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2004] [Revised: 10/13/2004] [Accepted: 10/13/2004] [Indexed: 11/20/2022]
Abstract
Many authors hypothesize that the epidermal growth factor (EGF) is involved in the onset of labor. Previous reports from our laboratory showed that intrauterine administration of EGF delays the beginning of labor. The aims of this study were: 1) to analyze the effect of intrauterine administration of 500 ng EGF on placental prostaglandins and nitric oxide, and 2) to characterize the expression of EGF receptors (EGF-R) in pregnant rat placentae. Saline solution (sham group) and 500 ng EGF (EGF-treated group) were administered via intrauterine injection on day 21 of gestation, and both groups of animals were sacrificed on day 22 (sham rats delivered on day 22). Results showed that EGF treatment: 1) inhibited the production of prostaglandin E (p<0.001) and F(2alpha) (p<0.01), 2) increased the synthesis of nitric oxide (p<0.001), and 3) reduced the expression of cyclooxygenase-II, the enzyme responsible for PG synthesis. Placentae were found to express EGF-R and its activated form, and the expressions of both forms were higher at mid and term pregnancy. Hence, EGF is a very interesting molecule for studying the regulation of placental prostaglandin and nitric oxide production related to the parturition process.
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Affiliation(s)
- M L Ribeiro
- Laboratory of Physiopathology of Pregnancy and Labor,Center for Pharmacological and Botanical Studies, Serrano 669, Buenos Aires, Argentina.
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36
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Ribeiro ML, Aisemberg J, Billi S, Farina MG, Meiss R, McCann S, Rettori V, Villalón M, Franchi AM. Epidermal growth factor prevents prepartum luteolysis in the rat. Proc Natl Acad Sci U S A 2005; 102:8048-53. [PMID: 15911754 PMCID: PMC1142386 DOI: 10.1073/pnas.0502899102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We have previously reported that intrauterine (i/u) administration of epidermal growth factor (EGF 500 ng) on day (d) 21 of pregnancy delayed 19.0 +/- 0.6 h the onset of labor. Progesterone (P) is secreted by ovarian corpora lutea (CL) throughout gestation in the rat. Prepartum CL regression due to increased uterine cyclooxygenase I and prostaglandin F(2alpha) results in P withdrawal followed by labor. The aims of the present work were (i) to study whether EGF delayed-onset of labor was mediated by a mechanism that prevented CL regression; (ii) to determine amniotic fluid (AF) EGF in pregnant rats. Rats on d21 of pregnancy received i/u EGF (500 ng) and were killed 0, 4, 8, 12, 24, and 48 h later. Control AF from rats on d13 and 18-22 of pregnancy was obtained. EGF decreased uterine prostaglandin F(2alpha) synthesis 8 h after treatment. Twelve hours after EGF injection, P reached its highest serum level and uterine cyclooxygenase I expression was undetectable. CL from rats killed 8 and 12 h after EGF were similar to those from rats on d13 of pregnancy, when serum P is maximum. EGF in AF increased throughout gestation, reached a maximum on d21, and decreased before the onset of labor. We suggest that the effect of EGF on the onset of labor was mediated by an early effect on the uterus that prevented prepartum CL regression.
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Affiliation(s)
- M L Ribeiro
- Laboratory of Physiopathology of Pregnancy and Labor, Center for Pharmacological and Botanical Studies, School of Medicine Paraquay 2155, Buenos Aires CP(1121), Argentina.
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Coelho LGV, Moretzsohn LD, Vieira WLS, Gallo MA, Passos MCF, Cindr JM, Cerqueira MC, Vitiello L, Ribeiro ML, Mendonça S, Pedrazzoli-Júnior J, Castro LP. New once-daily, highly effective rescue triple therapy after multiple Helicobacter pylori treatment failures: a pilot study. Aliment Pharmacol Ther 2005; 21:783-7. [PMID: 15771765 DOI: 10.1111/j.1365-2036.2005.02370.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Helicobacter pylori treatment failure is a growing problem in daily practice. AIM To determine the efficacy of the combination of rabeprazole, levofloxacin and furazolidone as a rescue therapy. METHODS Duodenal ulcer patients previously submitted, without success, to at least two H. pylori treatment regimens were included. Gastroscopy (urease test, histological examination and culture) and (13)C-urea breath test were performed. All patients received a combination of rabeprazole 20 mg, levofloxacin 500 mg and furazolidone 200 mg (two tablets) administered in a single dose in the morning for 10 days. Clinical examination and a new (13)C-urea breath test were performed 90 days after therapy. RESULTS Twelve patients (eight females and four males), mean age 43 (30-58) years were included. Two patients failed to complete the treatment because of nausea and vomiting. Ten patients completed the study and took all the medications as advised. Culture was obtained in six patients: 100 and 83% of the samples were sensitive to furazolidone and levofloxacin, respectively. Per-protocol and intention-to-treat eradication rates were 100 and 83% (P = 0.019). CONCLUSIONS the combination of rabeprazole, levofloxacin and furazolidone in a single daily dose for 10 days constitutes a highly-effective and low-cost alternative as a third-line therapy in patients infected with H. pylori.
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Affiliation(s)
- L G V Coelho
- Instituto Alfa de Gastroenterologia, Universidade Federal Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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Marchioretto MAM, Ecclissato C, da Silva CMF, Cassiano NM, Calafatti SA, Mendonça S, Ribeiro ML, Bernasconi GCR, Degger MF, Piovesan H, Pedrazzoli J. Plasma hydroxy-metronidazole/metronidazole ratio in hepatitis C virus-induced liver disease. Braz J Med Biol Res 2005; 38:437-44. [PMID: 15761624 DOI: 10.1590/s0100-879x2005000300015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
It has been suggested that the measurement of metronidazole clearance is a sensitive method for evaluating liver function. The aim of this study was to evaluate the usefulness of plasma hydroxy-metronidazole/metronidazole ratios as indicators of dynamic liver function to detect changes resulting from the various forms of chronic hepatitis C virus (HCV) infection. A total of 139 individuals were studied: 14 healthy volunteers, 22 healthy, asymptomatic, consecutive anti-HCV-positive HCV-RNA negative subjects, 81 patients with chronic hepatitis C (49 with moderate/severe chronic hepatitis and 34 with mild hepatitis), and 20 patients with cirrhosis of the liver. HCV status was determined by the polymerase chain reaction. Plasma concentrations of metronidazole and its hydroxy-metabolite were measured by reverse-phase high-performance liquid chromatography with ultraviolet detection in a blood sample collected 10 min after the end of a metronidazole infusion. Anti-HCV-positive HCV-RNA-negative individuals demonstrated a significantly reduced capacity to metabolize intravenously infused metronidazole compared to healthy individuals (0.0478 +/- 0.0044 vs 0.0742 +/- 0.0232). Liver cirrhosis patients also had a reduced plasma hydroxy-metronidazole/metronidazole ratio when compared to the other groups of anti-HCV-positive individuals (0.0300 +/- 0.0032 vs 0.0438 +/- 0.0027 (moderate/severe chronic hepatitis) vs 0.0455 +/- 0.0026 (mild chronic hepatitis) and vs 0.0478 +/- 0.0044 (anti-HCV-positive, HCV-RNA-negative individuals)). These results suggest an impairment of the metronidazole metabolizing system induced by HCV infection that lasts after viral clearance. In those patients with chronic hepatitis C, this impairment is paralleled by progression of the disease to liver cirrhosis.
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Affiliation(s)
- M A M Marchioretto
- Unidade Integrada de Farmacologia e Gastroenterologia, Faculdade de Medicina, Universidade São Francisco, Bragança Paulista, SP, Brasil
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Davel LE, Rimmaudo L, Español A, de la Torre E, Jasnis MA, Ribeiro ML, Gotoh T, de Lustig ES, Sales ME. Different mechanisms lead to the angiogenic process induced by three adenocarcinoma cell lines. Angiogenesis 2005; 7:45-51. [PMID: 15302995 DOI: 10.1023/b:agen.0000037329.45326.a8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Neoangiogenesis is essential for tumor and metastasis growth, but this complex process does not follow the same activation pathway, at least in tumor cell lines originated from different murine mammary adenocarcinomas. LMM3 cells were the most potent to stimulate new blood vessel formation. This response was significantly reduced by preincubating cells with indomethacin and NS-398, non-selective cyclooxygenase (COX) and COX-2 selective inhibitors, respectively. COX-1 and COX-2 isoenzymes were both highly expressed in LMM3 cells, and we observed that indomethacin was more effective than NS-398 to inhibit prostaglandin E2 (PGE2) synthesis. In addition, nitric oxide synthase (NOS) inhibitors, Nomega monomethyl L-arginine and aminoguanidine, also reduced LMM3-induced angiogenesis and nitric oxide (NO) synthesis as well. NOS2 > NOS3 proteins and arginase II isoform were detected in LMM3 cells by Western blot. The latter enzyme was also involved in the LMM3 neovascular response, since the arginase inhibitor, Nomega hydroxy L-arginine reduced the angiogenic cascade. On the other hand, parental LM3 cells were able to stimulate neovascularization via COX-1 and arginase products since only indomethacin and Nomega hydroxy L-arginine, which diminished PGE2 and urea synthesis, respectively, also reduced angiogenesis. In turn, LM2 cells angiogenic response could be due in fact to PGE2-induced VEGF liberation that stimulated neoangiogenesis at very low levels of NO.
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Affiliation(s)
- Lilia E Davel
- Instituto de Oncología Angel H. Roffo, Facultad de Medicina, UBA, Buenos Aires, Argentina
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Cabral DF, Santos A, Ribeiro ML, Mesquita JC, Carvalho-Salles AB, Hackel C. Rarity of DNA sequence alterations in the promoter region of the human androgen receptor gene. Braz J Med Biol Res 2004; 37:1789-94. [PMID: 15558185 DOI: 10.1590/s0100-879x2004001200004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The human androgen receptor (AR) gene promoter lies in a GC-rich region containing two principal sites of transcription initiation and a putative Sp1 protein-binding site, without typical "TATA" and "CAAT" boxes. It has been suggested that mutations within the 5'untranslated region (5'UTR) may contribute to the development of prostate cancer by changing the rates of gene transcription and/or translation. In order to investigate this question, the aim of the present study was to search for the presence of mutations or polymorphisms at the AR-5'UTR in 92 prostate cancer patients, where histological diagnosis of adenocarcinoma was established in specimens obtained from transurethral resection or after prostatectomy. The AR-5'UTR was amplified by PCR from genomic DNA samples of the patients and of 100 healthy male blood donors, included as controls. Conformation-sensitive gel electrophoresis was used for DNA sequence alteration screening. Only one band shift was detected in one individual from the blood donor group. Sequencing revealed a new single nucleotide deletion (T) in the most conserved portion of the promoter region at position +36 downstream from the transcription initiation site I. Although the effect of this specific mutation remains unknown, its rarity reveals the high degree of sequence conservation of the human androgen promoter region. Moreover, the absence of detectable variation within the critical 5'UTR in prostate cancer patients indicates a low probability of its involvement in prostate cancer etiology.
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Affiliation(s)
- D F Cabral
- Centro de Biologia Molecular e Engenharia Genética, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brazil
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Gonçalves P, Pereira JC, Rebelo U, Ribeiro ML. Gene symbol: ALAS2. Disease: sideroblastic anaemia. Hum Genet 2004; 115:531. [PMID: 15565468 DOI: 10.1007/s00439-004-1197-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- P Gonçalves
- Unidade de Hematologia Molecular, Serviço de Hematologia, Centro Hospitalier de Coimbra, Portugal.
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42
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Gonçalves P, Pereira JC, Ribeiro ML. Gene symbol: ALAS2. Disease: sideroblastic anaemia. Hum Genet 2004; 115:532. [PMID: 15678585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- P Gonçalves
- Unidade de Hematologia Molecular, Serviço de Hematologia, Centro Hospitalar de Coimbra, Portugal.
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Gonçalves P, Pereira JC, Kidd AMJ, Ribeiro ML. Gene symbol: RPS19. Disease: Diamond-Blackfan anaemia. Hum Genet 2004; 115:534. [PMID: 15678589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- P Gonçalves
- Unidade de Hematologia Molecular, Serviço de Hematologia, Centro Hospitalar de Coimbra, Portugal.
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44
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Pereira JC, Gutiérrez EO, Ribeiro ML. Gene symbol: ALAS2. Disease: sideroblastic anaemia. Hum Genet 2004; 115:533. [PMID: 15678587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- J C Pereira
- Unidade de Hematologia Molecular, Serviço de Hematologia, Centro Hospitalar de Coimbra, Portugal.
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Pereira JC, Gonçalves P, Cuhna E, Ribeiro ML. Gene symbol: ALAS2. Disease: sideroblastic anaemia. Hum Genet 2004; 115:533. [PMID: 15678586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- J C Pereira
- Unidade de Hematologia Molecular, Serviço de Hematologia, Centro Hospitalar de Coimbra, Portugal.
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Farina M, Ribeiro ML, Weissmann C, Estevez A, Billi S, Vercelli C, Franchi A. Biosynthesis and catabolism of prostaglandin F2alpha (PGF2alpha) are controlled by progesterone in the rat uterus during pregnancy. J Steroid Biochem Mol Biol 2004; 91:211-8. [PMID: 15336698 DOI: 10.1016/j.jsbmb.2004.05.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2004] [Accepted: 05/03/2004] [Indexed: 11/28/2022]
Abstract
Myometrial quiescence is a key factor in all species to accomplish a successful gestation. PGs play a crucial role in mediating parturition events, and their synthesis and metabolism are regulated by cyclooxygenases (COXs) and NAD(+)-dependent 15-hydroxy-PG dehydrogenase (PGDH), respectively. Progesterone (P(4)) is the hormone responsible for maintaining uterine smooth muscle quiescence during pregnancy. In this work, we have studied the effect of P(4) on the activity of COXs and PGDH, the uterine enzymes involved in the biosynthesis and metabolism of prostanoids in the rat. We found that during pregnancy PGF(2alpha) production and also protein levels of COX-1 and COX-2 were decreased. The exogenous administration of P(4) significantly inhibited the uterine production of PGF(2alpha) and also the protein level of COX-2. PGF(2alpha), metabolism was assessed by PGDH activity, which resulted high during pregnancy and increased as a result of P(4) administration. These results indicate that PGs levels were negatively modulated by P(4), which could be exerting its effect by increasing PGs metabolism through stimulation on PGDH activity and an inhibition on COX and that is a major mechanism for maintain uterine quiescence in pregnancy.
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Affiliation(s)
- M Farina
- Center of Pharmacological and Botanical Studies (CEFYBO), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Serrano 669, Capital Federal, 1414 Buenos Aires, Argentina
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Bento MC, Ribeiro ML, Relvas L. Gene symbol: HFE. Disease: Haemochromatosis. Hum Genet 2004; 114:405. [PMID: 15046077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Affiliation(s)
- M C Bento
- Unidade de Hematologia Molecular Serviço de Hematologia, Hospital Pediátrico de Coimbra, Portugal
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48
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Ribeiro ML, Farina M, Aisemberg J, Franchi A. Effects of in vivo administration of epidermal growth factor (EGF) on uterine contractility, prostaglandin production and timing of parturition in rats. Reproduction 2004; 126:459-68. [PMID: 14525528 DOI: 10.1530/rep.0.1260459] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Prostaglandins synthesized by cyclooxygenases elicit uterine contractions during labour. Nitric oxide synthases (NOS) produce nitric oxide (NO), which maintains uterine quiescence during pregnancy. Epidermal growth factor (EGF) interacts with prostaglandins and NO in many biological systems. The aim of this work was to study the effect of the in vivo administration of EGF on uterine contractility, prostaglandin production and timing of parturition in rats. EGF was injected into the uterine lumen of pregnant rats on day 20, 21 or 22 of gestation. Intra-uterine administration of 500 ng EGF on day 21 of gestation delayed parturition for 18 h compared with control rats. Administration of EGF was able to: (i) reduce cyclooxygenase expression in the uterus (determined by western blot analysis) and production of prostaglandins by the uterus (evaluated by conversion of [(14)C]arachidonate to labelled prostaglandins); (ii) decrease prostaglandin concentrations in amniotic fluid (radioimmunoassay); (iii) increase NO production (evaluated by conversion of [(14)C]arginine into [(14)C]citrulline); (iv) increase serum progesterone concentrations to more than control concentrations (P<0.05; radioimmunoassay); and (v) reduce the amplitude of the uterine contractions. The overall effect was a delay in the onset of delivery. This in vivo effect raises the question of whether exogenous EGF plays a role in the initiation of parturition.
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Affiliation(s)
- M L Ribeiro
- Laboratorio de Fisio-patología de la Preñez y el Parto, Centro de Estudios Farmacológicos y Botánicos (CEFYBO, CONICET), Serrano 669, 3rd Floor, C1414DEM, Bs. As. Argentina.
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Ogando D, Cella M, Ribeiro ML, Weissmann C, Aisemberg J, Franchi A. IL-10 inhibits nitric oxide synthesis in murine uterus. Neuroimmunomodulation 2004; 11:127-32. [PMID: 14758059 DOI: 10.1159/000075322] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2003] [Accepted: 04/30/2003] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES Recent reports point to a role for the nitric oxide/nitric oxide synthase (NO/NOS) system in implantation. It has been suggested that inducible NOS expressed at peri-implantation would lead to enhanced NO production, which could promote the attachment of the blastocyst. Short-term administration of NO donors during the pre-implantation period reduced the pregnancy rate in a dose-dependent manner. Thus, it is thought that optimal levels of NO are critical for embryo implantation, so regulation of NOS must be crucial. Taking this into consideration, interleukin-10 (IL-10), synthesized and secreted by the embryo, could be modulating NOS during implantation. In this study we have investigated the in vitro effect of IL-10 on NOS in the uterus. METHODS To determine the effect of IL-10, slices of uterus from estrogenized mice were pre-incubated for 60 min with different concentrations of IL-10 and NOS activity was measured. RESULTS IL-10 (50 and 100 ng/ml in vitro) diminished NOS activity. The in vivo administration of lipopolysaccharide (LPS; 8 mg/kg) significantly increased the conversion of arginine into citrulline. This effect was abolished after 60 min of preincubation with IL-10 (100 ng/ml). The stimulatory effect of LPS and estrogen on NOS activity is exerted on the Ca-independent isoform and IL-10 in vitro abolished this increase. We observed that the uterus of pregnant mice on day 5 of gestation synthesized NO. This production was significantly inhibited by preincubation with IL-10 (100 ng/ml). CONCLUSIONS This report demonstrates that IL-10 is capable of inhibiting NO synthesis in estrogenized, LPS-treated and pregnant rat uterus.
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Affiliation(s)
- Diego Ogando
- Centro de Estudios Farmacológicos y Botánicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
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Ribeiro ML, Ogando D, Farina M, Franchi A. Epidermal growth factor modulation of prostaglandins and nitrite biosynthesis in rat fetal membranes. Prostaglandins Leukot Essent Fatty Acids 2004; 70:33-40. [PMID: 14643177 DOI: 10.1016/j.plefa.2003.08.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The production of prostaglandins (PGs) and nitric oxide (NO) by amnion tissue may play a significant role in parturition. It is thought that epidermal growth factor (EGF) may be one of the fetal signals that governs the initiation of labor. The aim of the present study was to investigate the effect of EGF in vivo on the PGs and nitrite production of rat fetal membranes. We have evaluated the regulation of PGs and nitrite production in rat fetal membranes ex vivo. The intra-uterine administration of EGF 500 ng in day 21 of pregnancy induced increases in PGE(2) (P<0.001) and PGF(2alpha) (P<0.01) compared to the control fetal membranes from pregnant rats on day 22. Also, this dose of EGF diminished nitrate production significantly (P<0.01). We found that fetal membranes at term (days 18-22 of gestation) expressed EGF-R. The NO donor, nitroprussiate 300 and 600 microM, elicited an inhibitory effect on the PGE(2) and PGF(2alpha) stimulated synthesis. On the other hand, indomethacin 10(-6) and 10(-7)M, a non-selective cyclooxygenase inhibitor, reverted the inhibitory effect exerted by EGF. Hence, rat fetal membranes were found to express epidermal growth factor receptors and, under the effect of EGF, PGs and nitrites production pathways interact probably to prevent a toxic effect caused by an exacerbated synthesis of these mediators.
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Affiliation(s)
- M L Ribeiro
- Laboratorio de Fisio-patología de la preñez y el parto, Centro de Estudios Farmacológicos y Botánicos, Serrano 669, 3rd floor, CP (C1414DEM), Bs As, Argentina.
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