1
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Karahan G, Martel J, Rahimi S, Farag M, Matias F, MacFarlane AJ, Chan D, Trasler J. Higher incidence of embryonic defects in mouse offspring conceived with assisted reproduction from fathers with sperm epimutations. Hum Mol Genet 2023; 33:48-63. [PMID: 37740387 PMCID: PMC10729866 DOI: 10.1093/hmg/ddad160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/30/2023] [Accepted: 09/13/2023] [Indexed: 09/24/2023] Open
Abstract
Assisted reproductive technologies (ART) account for 1-6% of births in developed countries. While most children conceived are healthy, increases in birth and genomic imprinting defects have been reported; such abnormal outcomes have been attributed to underlying parental infertility and/or the ART used. Here, we assessed whether paternal genetic and lifestyle factors, that are associated with male infertility and affect the sperm epigenome, can influence ART outcomes. We examined how paternal factors, haploinsufficiency for Dnmt3L, an important co-factor for DNA methylation reactions, and/or diet-induced obesity, in combination with ART (superovulation, in vitro fertilization, embryo culture and embryo transfer), could adversely influence embryo development and DNA methylation patterning in mice. While male mice fed high-fat diets (HFD) gained weight and showed perturbed metabolic health, their sperm DNA methylation was minimally affected by the diet. In contrast, Dnmt3L haploinsufficiency induced a marked loss of DNA methylation in sperm; notably, regions affected were associated with neurodevelopmental pathways and enriched in young retrotransposons, sequences that can have functional consequences in the next generation. Following ART, placental imprinted gene methylation and growth parameters were impacted by one or both paternal factors. For embryos conceived by natural conception, abnormality rates were similar for WT and Dnmt3L+/- fathers. In contrast, paternal Dnmt3L+/- genotype, as compared to WT fathers, resulted in a 3-fold increase in the incidence of morphological abnormalities in embryos generated by ART. Together, the results indicate that embryonic morphological and epigenetic defects associated with ART may be exacerbated in offspring conceived by fathers with sperm epimutations.
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Affiliation(s)
- Gurbet Karahan
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Mena Farag
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
| | - Fernando Matias
- Nutrition Research Division, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | | | - Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Jacquetta Trasler
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, H3G 1Y6, Canada
- Department of Pediatrics, McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
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Girón S, Martel J, Galindo M, Herrera-Limones R. Building and environmental acoustics in obsolete residential neighbourhoods: The case of San Pablo, Spain. Heliyon 2023; 9:e19414. [PMID: 37809548 PMCID: PMC10558503 DOI: 10.1016/j.heliyon.2023.e19414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/15/2023] [Accepted: 08/22/2023] [Indexed: 10/10/2023] Open
Abstract
In order to establish an agreement between the objectives of acoustic quality in the outdoor environment and the acoustic insulation in a building as required in the current legislation in Spain, the acoustic insulation of typical social housing has been studied in the residential neighbourhood of San Pablo in Seville. Field measurements based on acoustic sonometry have been performed in its public areas, together with the consultations to the strategic noise maps prepared by the administration of the city and with data from a questionnaire answered by neighbours on the perception of environmental and domestic noise. These inputs have enabled calculations of airborne and impact noise insulation in a typical dwelling of the neighbourhood. The neighbourhood presents various kinds of obsolescence, as do many residential estates built in Europe in the same period, mainly in terms of its low quality of construction and structural solutions, its energy poverty, and its typology. Results on acoustic insulation indicate that the requirements of current Spanish legislation have not been met, Dnt,A = 49 dBA, L'nT,w = 80 dB. However, thanks not only to the urban layout of the various types of housing blocks in the neighbourhood, but also to the breadth and abundance of green and common areas and to their roads, the existing environmental sound levels remain below the established limit: Ld < 60 dBA. Hence, the calculation for the external noise insulation in façades indicates that the requirements are met, D2m,nT,Atr = 33 dBA. In the acoustic survey, most people consider the environmental acoustic conditions of the neighbourhood to be acceptable or good and believe that they are barely affected by the domestic noise of next-door neighbours. The research found that social heritage neighbourhoods of the 1960s and 1970s, laid out with cul-de-sacs, curved layouts, and small pockets of parking, significantly improve their urban acoustic performance.
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Affiliation(s)
- S. Girón
- Instituto Universitario de Arquitectura y Ciencias de la Construcción (IUACC), Departamento de Física Aplicada II, Escuela Técnica Superior de Arquitectura, Universidad de Sevilla, Avenida Reina Mercedes 2, 41012, Seville, Spain
| | - J. Martel
- Instituto Universitario de Arquitectura y Ciencias de la Construcción (IUACC), Departamento de Física Aplicada II, Escuela Técnica Superior de Arquitectura, Universidad de Sevilla, Avenida Reina Mercedes 2, 41012, Seville, Spain
| | - M. Galindo
- Instituto Universitario de Arquitectura y Ciencias de la Construcción (IUACC), Departamento de Física Aplicada II, Escuela Técnica Superior de Arquitectura, Universidad de Sevilla, Avenida Reina Mercedes 2, 41012, Seville, Spain
| | - R. Herrera-Limones
- Instituto Universitario de Arquitectura y Ciencias de la Construcción (IUACC), Departamento de Construcciones Arquitectónicas I, Escuela Técnica Superior de Arquitectura, Universidad de Sevilla, Avenida Reina Mercedes 2, 41012, Seville, Spain
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Rahimi S, Shao X, Chan D, Martel J, Bérard A, Fraser WD, Simon MM, Kwan T, Bourque G, Trasler J. Capturing sex-specific and hypofertility-linked effects of assisted reproductive technologies on the cord blood DNA methylome. Clin Epigenetics 2023; 15:82. [PMID: 37170172 PMCID: PMC10176895 DOI: 10.1186/s13148-023-01497-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 05/02/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND Children conceived through assisted reproduction are at an increased risk for growth and genomic imprinting disorders, often linked to DNA methylation defects. It has been suggested that assisted reproductive technology (ART) and underlying parental infertility can induce epigenetic instability, specifically interfering with DNA methylation reprogramming events during germ cell and preimplantation development. To date, human studies exploring the association between ART and DNA methylation defects have reported inconsistent or inconclusive results, likely due to population heterogeneity and the use of technologies with limited coverage of the epigenome. In our study, we explored the epigenetic risk of ART by comprehensively profiling the DNA methylome of 73 human cord blood samples of singleton pregnancies (n = 36 control group, n = 37 ART/hypofertile group) from a human prospective longitudinal birth cohort, the 3D (Design, Develop, Discover) Study, using a high-resolution sequencing-based custom capture panel that examines over 2.4 million autosomal CpGs in the genome. RESULTS We identified evidence of sex-specific effects of ART/hypofertility on cord blood DNA methylation patterns. Our genome-wide analyses identified ~ 46% more CpGs affected by ART/hypofertility in female than in male infant cord blood. We performed a detailed analysis of three imprinted genes which have been associated with altered DNA methylation following ART (KCNQ1OT1, H19/IGF2 and GNAS) and found that female infant cord blood was associated with DNA hypomethylation. When compared to less invasive procedures such as intrauterine insemination, more invasive ARTs (in vitro fertilization, intracytoplasmic sperm injection, embryo culture) resulted in more marked and distinct effects on the cord blood DNA methylome. In the in vitro group, we found a close to fourfold higher proportion of significantly enriched Gene Ontology terms involved in development than in the in vivo group. CONCLUSIONS Our study highlights the ability of a sensitive, targeted, sequencing-based approach to uncover DNA methylation perturbations in cord blood associated with hypofertility and ART and influenced by offspring sex and ART technique invasiveness.
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Affiliation(s)
- Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Xiaojian Shao
- Digital Technologies Research Centre, National Research Council Canada, Ottawa, ON, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Anick Bérard
- Research Unit On Medications and Pregnancy, Research Centre, CHU Sainte-Justine, Montreal, Canada
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
- Faculty of Medicine, Université Claude Bernard Lyon 1, Lyon, France
| | - William D Fraser
- Department of Obstetrics and Gynecology, Université de Sherbrooke and Centre de Recherche du CHUS, Sherbrooke, QC, Canada
| | | | - Tony Kwan
- McGill University Genome Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Guillaume Bourque
- McGill University Genome Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Jacquetta Trasler
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada.
- Department of Human Genetics, McGill University, Montreal, QC, Canada.
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada.
- Department of Pediatrics, McGill University, Montreal, QC, Canada.
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Chan D, Ly L, Rebolledo EMD, Martel J, Landry M, Scott-Boyer MP, Droit A, Trasler JM. Transgenerational impact of grand-paternal lifetime exposures to both folic acid deficiency and supplementation on genome-wide DNA methylation in male germ cells. Andrology 2023. [PMID: 36697378 DOI: 10.1111/andr.13399] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 07/20/2022] [Revised: 01/05/2023] [Accepted: 01/22/2023] [Indexed: 01/27/2023]
Abstract
BACKGROUND DNA methylation (DNAme) erasure and reacquisition occur during prenatal male germ cell development; some further remodeling takes place after birth during spermatogenesis. Environmental insults during germline epigenetic reprogramming may affect DNAme, presenting a potential mechanism for transmission of environmental exposures across multiple generations. OBJECTIVES We investigated how germ cell DNAme is impacted by lifetime exposures to diets containing either low or high, clinically relevant, levels of the methyl donor folic acid and whether resulting DNAme alterations were inherited in germ cells of male offspring of subsequent generations. MATERIALS AND METHODS Female mice were placed on a control (FCD), 7-fold folic acid deficient (7FD) or 10- to 20-fold supplemented (10FS and 20FS) diet before and during pregnancy. Resulting F1 litters were weaned on the respective diets. F2 and F3 males received control diets. Genome-wide DNAme at cytosines (within CpG sites) was assessed in F1 spermatogonia, and in F1, F2 and F3 sperm. RESULTS In F1 germ cells, a greater number of differentially methylated cytosines (DMCs) were observed in spermatogonia as compared with F1 sperm for all folic acid diets. DMCs were lower in number in F2 versus F1 sperm, while an unexpected increase was found in F3 sperm. DMCs were predominantly hypomethylated, with genes in neurodevelopmental pathways commonly affected in F1, F2 and F3 male germ cells. While no DMCs were found to be significantly inherited inter- or transgenerationally, we observed over-representation of repetitive elements, particularly young long interspersed nuclear elements (LINEs). DISCUSSION AND CONCLUSION These results suggest that the prenatal window is the time most susceptible to folate-induced alterations in sperm DNAme in male germ cells. Altered methylation of specific sites in F1 germ cells was not present in later generations. However, the presence of DNAme perturbations in the sperm of males of the F2 and F3 generations suggests that epigenetic inheritance mechanisms other than DNAme may have been impacted by the folate diet exposure of F1 germ cells.
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Affiliation(s)
- Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Lundi Ly
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Edgar Martínez Duncker Rebolledo
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Mylène Landry
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | | | - Arnaud Droit
- Centre de Recherche du CHU de Québec-Université Laval, Québec, QC, Canada.,Département de Médecine Moléculaire, Université Laval, Québec, QC, Canada
| | - Jacquetta M Trasler
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Human Genetics, McGill University, Montreal, QC, Canada.,Departments of Pediatrics and Pharmacology & Therapeutics, McGill University, Montreal, QC, Canada
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5
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Ihirwe RG, Martel J, Rahimi S, Trasler J. Protective and sex-specific effects of moderate dose folic acid supplementation on the placenta following assisted reproduction in mice. FASEB J 2023; 37:e22677. [PMID: 36515682 PMCID: PMC10108070 DOI: 10.1096/fj.202201428r] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 09/01/2022] [Revised: 11/02/2022] [Accepted: 11/21/2022] [Indexed: 12/15/2022]
Abstract
Epigenetic defects induced by assisted reproductive technologies (ART) have been suggested as a potential mechanism contributing to suboptimal placentation. Here, we hypothesize that ART perturbs DNA methylation (DNAme) and gene expression during early placenta development, leading to abnormal placental phenotypes observed at term. Since folic acid (FA) plays a crucial role in epigenetic regulation, we propose that FA supplementation can rescue ART-induced placental defects. Female mice were placed on a control diet (CD), a moderate 4-fold (FAS4) or high dose 10-fold (FAS10) FA-supplemented diet prior to ART and compared to a natural mating group. ART resulted in 41 and 28 differentially expressed genes (DEGs) in E10.5 female and male placentas, respectively. Many DEGs were implicated in early placenta development and associated with DNAme changes; a number clustered at known imprinting control regions (ICR). In females, FAS4 partially corrected alterations in gene expression while FAS10 showed evidence of male-biased adverse effects. DNAme and gene expression for five genes involved in early placentation (Phlda2, EphB2, Igf2, Peg3, L3mbtl1) were followed up in placentas from normal as well as delayed and abnormal embryos. Phlda2 and Igf2 expression levels were lowest after ART in placentas of female delayed embryos. Moreover, ART concomitantly reduced DNAme at the Kcnq1ot1 ICR which regulates Phlda2 expression; FAS4 partially improved DNAme in a sex-specific manner. In conclusion, ART-associated placental DNAme and transcriptome alterations observed at mid-gestation are sex-specific; they may help explain adverse placental phenotypes detected at term and are partially corrected by maternal moderate dose FA supplementation.
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Affiliation(s)
- Rita Gloria Ihirwe
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Jacquetta Trasler
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada.,Department of Pediatrics, McGill University, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
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Tillett Z, Strout T, Martel J, Crispo M. 85 An Assessment of Out-of-Hospital Provider Education and Sequelae Around Breaking Bad News. Ann Emerg Med 2022. [DOI: 10.1016/j.annemergmed.2022.08.108] [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] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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7
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Martel J, Addo K, Kim Y, Hamdan F, Demo H, Bonavita G, Li J, Ahmad S, Shah S, Delurgio D, Bailey C, Shim J. Impact of mapping technology on procedural characteristics during radiofrequency or cryoballoon pulmonary vein isolation for atrial fibrillation. Europace 2022. [DOI: 10.1093/europace/euac053.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background/Introduction: Cryoballoon ablation (CBA) is often associated with shorter procedure times along with tradeoffs such as increased fluoroscopy use compared to radiofrequency (RF) ablation of atrial fibrillation (AF), however the impact of mapping technology on these characteristics is not fully understood.
Purpose
To assess the effect of mapping technology on trends in fluoroscopy use and procedure times in AF pulmonary vein isolation (PVI) procedures with an RF or CBA catheter.
Methods
Acute procedure data from 210 de novo AF cases using a 3D mapping system was prospectively collected from 48 centers in eight countries. Choice of technology was left to physician discretion; a PVI only ablation strategy was utilized in all cases. Procedure data such as total procedure and fluoroscopy times from cases using either an RF or CBA catheter with either a grid-style mapping catheter (HD Grid) or circular mapping catheter (CMC) were compared.
Results
Of the 210 cases, RF ablation was used in 103 (49%), and CBA used in 107 (51%). In RF cases, a relatively even split between CMC and HD Grid use was observed (n=46, 45% vs. n=57, 55%), while a CMC was used in 100% of CBA cases (Figure 1). Across all cases, fluoroscopy and procedure times were significantly shorter when HD Grid was used (7.4±26.7 minutes; 108.2±46.3 minutes) compared to a CMC (20.4±17.6 minutes; 133.7±62.7) (p<0.001; p=0.003). A similar trend was also observed in RF cases using HD Grid (7.4±26.7 minutes; 108.2±46.3 minutes) compared to a CMC (17.9±12.3 minutes; 175.1±50.5) (p=0.01; p<0.001). Fluoroscopy times in RF cases with HD Grid (7.4±26.7 minutes) were significantly shorter compared to CBA cases with a CMC (21.5±19.4 minutes) (p<0.001), while procedure times were similar (108.2±46.3 minutes; 116.0±59.2 minutes, p=0.20).
Conclusion(s)
Use of HD Grid resulted in significantly shorter procedure and fluoroscopy times compared to a CMC across all cases, including those using RF ablation. Fluoroscopy times were also significantly shorter in RF cases using HD Grid compared to CBA cases using a CMC, with similar procedure times. These observations suggest that use of HD Grid may better enable safer and more efficient PVI, specifically when employing RF ablation, in addition to safer and equally efficient RF PVI compared to CBA with a CMC. Further study in in a larger, randomized cohort may be necessary.
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Affiliation(s)
- J Martel
- South Miami Hospital, Miami, United States of America
| | - K Addo
- Mount Carmel Health System, Columbus, United States of America
| | - Y Kim
- Korea University, Seoul, Korea (Republic of)
| | - F Hamdan
- Aultman Hospital, Canton, United States of America
| | - H Demo
- Swedish Hospital, Chicago, United States of America
| | - G Bonavita
- Aultman Hospital, Canton, United States of America
| | - J Li
- ProMedica Toledo Hospital, Toledo, United States of America
| | - S Ahmad
- Kettering Medical Center, Dayton, United States of America
| | - S Shah
- Virginia Arrhythmia Consultants, Richmond, United States of America
| | - D Delurgio
- Emory Saint Joseph’s Hospital, Atlanta, United States of America
| | - C Bailey
- Abbott, St. Paul, United States of America
| | - J Shim
- Korea University, Seoul, Korea (Republic of)
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Shah S, Shim J, Martel J, Addo K, Delurgio D, Demo H, Hamdan F, Bonavita G, Li J, Bailey C, Kim Y. Global preferences in mapping technology and its impact on fluoroscopy and procedure times during catheter ablation of atrial fibrillation. Europace 2022. [DOI: 10.1093/europace/euac053.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background/Introduction
Choice in mapping technology may play a critical role in reducing fluoroscopy and procedure times during atrial fibrillation (AF) ablation, however this relationship is not well studied.
Purpose
To assess the impact of mapping technology on trends in fluoroscopy use and procedure times in AF ablation procedures.
Methods
Acute procedure data from 525 AF cases was prospectively collected from 68 centers in nine countries. Choice of technology and ablation strategy, including PVI and substrate modification, were left to physician discretion. Procedure data such as total procedure and fluoroscopy times from cases using a grid-style mapping catheter (HD Grid) were compared to those using a circular mapping catheter (CMC).
Results
Of the 525 cases, HD Grid was used in 230 (44%), and CMC was used in 295 (56%). HD Grid was routinely used for both de novo and redo procedures while CMC was used predominantly for de novo procedures (Table 1). Similar procedure times were noted in redo PAF and redo PersAF procedures, while significantly shorter procedure times were observed for the HD Grid group in both de novo PAF and PersAF (113.9±48.8 vs. 125.9±56.3 minutes, p=0.04; and 142.8±53.2 vs. 169.8±52.2 minutes, p=0.001).
Overall fluoroscopy times were significantly shorter using HD Grid compared to a CMC (9.0±19.6 minutes vs. 19.8±16.4 minutes, p<0.001), including significantly shorter fluoroscopy times in de novo PAF, de novo PersAF, and redo PAF (Table 1). There were 155 cases completed without fluoroscopy use; zero fluoroscopy cases accounted for 50% (114/230) and 14% (41/295) of total cases completed with HD Grid and a CMC, respectively (p<0.001).
Conclusion(s)
Use of HD Grid was observed in a significantly higher portion of zero fluoroscopy cases and resulted in significantly shorter procedure and fluoroscopy times in both de novo PAF and de novo PersAF and significantly shorter fluoroscopy times in redo PAF. These observations suggest that use of HD Grid may better enable faster and safer procedures in these specific AF types compared to CMCs, although further analysis in a larger, randomized cohort may be warranted.
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Affiliation(s)
- S Shah
- Virginia Arrhythmia Consultants, Richmond, United States of America
| | - J Shim
- Korea University, Seoul, Korea (Republic of)
| | - J Martel
- South Miami Hospital, Miami, United States of America
| | - K Addo
- Mount Carmel Health System, Columbus, United States of America
| | - D Delurgio
- Emory Saint Joseph’s Hospital, Atlanta, United States of America
| | - H Demo
- Swedish Hospital, Chicago, United States of America
| | - F Hamdan
- Aultman Hospital, Canton, United States of America
| | - G Bonavita
- Aultman Hospital, Canton, United States of America
| | - J Li
- ProMedica Toledo Hospital, Toledo, United States of America
| | - C Bailey
- Abbott, St. Paul, United States of America
| | - Y Kim
- Korea University, Seoul, Korea (Republic of)
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Friera A, Martí M, Torregrosa A, Valdés P, Fernández-Gil M, Martel J, Pueyo J, Gorospe L, Rovira À, Mesa J, Parlorio E, Munuera J. Ecografía: estado actual y postura de la SERAM. Radiología 2022. [DOI: 10.1016/j.rx.2021.12.001] [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] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hansen J, Strout T, Sholl J, Martel J. 161 Community Based Prehospital Care Project: Providing a Low-Barrier-to-Access Care Model for Those Experiencing Homelessness in an Urban Environment. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.172] [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] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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McClymont E, Fell D, Albert A, Alton G, Barrett J, El-Chaar D, Harrold J, Krajden M, Lipsky N, Maan E, Malinowski A, Othman M, Raeside A, Ray J, Roberts A, Ryan G, Sadarangani M, Sauve L, van Schalkwyk J, Shah P, Snelgrove J, Sprague A, Ting J, Walker M, Whittle W, Williams C, Yudin M, Zipursky J, Abenhaim H, Boucoiran I, Castillo E, Crane J, Elwood C, Joynt C, Kotaska A, Martel J, Murphy-Kaulbeck L, Poliquin V, Ryan S, Saunders S, Scott H, Money D. Canadian surveillance of COVID-19 in pregnancy: Epidemiology and maternal and infant outcomes. Am J Obstet Gynecol 2020. [PMCID: PMC7683302 DOI: 10.1016/j.ajog.2020.08.137] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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12
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Boudray J, Martel J, Carmignac V, Terriat B, Ricolfi F, Olivier-Faivre L, Vabres P. Traitement innovant des malformations artério-veineuses multiples associées à PTEN par l’alpélisib. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.374] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Weiss K, Groten T, Martel J, Radosa J, Wagenpfeil G, Meyberg-Solomayer G, Takacs Z, Geisel J, Solomayer EF, Zemlin M, Hamza A. Zusammenhang zwischen maternalen Glukose-Stoffwechsel im 3. Trimenon und Neugeborenenstoffwechsel. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1717987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- K Weiss
- Klinik für Frauenheilkunde, Geburtshilfe und Reproduktionsmedizin, Universitätsklinikum des Saarlandes
| | - T Groten
- Universitätsklinikum Jena, Klinik für Geburtshilfe
| | - J Martel
- Klinik für Frauenheilkunde, Geburtshilfe und Reproduktionsmedizin, Universitätsklinikum des Saarlandes
| | - J Radosa
- Klinik für Frauenheilkunde, Geburtshilfe und Reproduktionsmedizin, Universitätsklinikum des Saarlandes
| | - G Wagenpfeil
- Universitätsklinikum des Saarlandes, Theoretische und Klinische Medizin
| | - G Meyberg-Solomayer
- Klinik für Frauenheilkunde, Geburtshilfe und Reproduktionsmedizin, Universitätsklinikum des Saarlandes
| | - Z Takacs
- Klinik für Frauenheilkunde, Geburtshilfe und Reproduktionsmedizin, Universitätsklinikum des Saarlandes
| | - J Geisel
- Universitätsklinikum des Saarlandes, Zentrallabor
| | - E.-F Solomayer
- Klinik für Frauenheilkunde, Geburtshilfe und Reproduktionsmedizin, Universitätsklinikum des Saarlandes
| | - M Zemlin
- Klinik für Allgemeine Pädiatrie und Neonatologie, Universitätsklinikum des Saarlandes
| | - A Hamza
- Klinik für Frauenheilkunde, Geburtshilfe und Reproduktionsmedizin, Universitätsklinikum des Saarlandes
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Rahimi S, Martel J, Karahan G, Angle C, Behan NA, Chan D, MacFarlane AJ, Trasler JM. Moderate maternal folic acid supplementation ameliorates adverse embryonic and epigenetic outcomes associated with assisted reproduction in a mouse model. Hum Reprod 2020; 34:851-862. [PMID: 30989206 DOI: 10.1093/humrep/dez036] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [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: 09/24/2018] [Revised: 01/14/2019] [Indexed: 01/08/2023] Open
Abstract
STUDY QUESTION Could clinically-relevant moderate and/or high dose maternal folic acid supplementation prevent aberrant developmental and epigenetic outcomes associated with assisted reproductive technologies (ART)? SUMMARY ANSWER Our results demonstrate dose-dependent and sex-specific effects of folic acid supplementation in ART and provide evidence that moderate dose supplements may be optimal for both sexes. WHAT IS KNOWN ALREADY Children conceived using ART are at an increased risk for growth and genomic imprinting disorders, often associated with DNA methylation defects. Folic acid supplementation is recommended during pregnancy to prevent adverse offspring outcomes; however, the effects of folic acid supplementation in ART remain unclear. STUDY DESIGN, SIZE, DURATION Outbred female mice were fed three folic acid-supplemented diets, control (rodent daily recommended intake or DRI; CD), moderate (4-fold DRI; 4FASD) or high (10-fold DRI; 10FASD) dose, for six weeks prior to ART and throughout gestation. Mouse ART involved a combination of superovulation, in vitro fertilisation, embryo culture and embryo transfer. PARTICIPANTS/MATERIALS, SETTING, METHODS Midgestation embryos and placentas (n = 74-99/group) were collected; embryos were assessed for developmental delay and gross morphological abnormalities and embryos and placentas were examined for epigenetic defects. We assessed methylation at four imprinted genes (Snrpn, Kcnq1ot1, Peg1 and H19) in matched midgestation embryos and placentas (n = 31-32/group) using bisulfite pyrosequencing. In addition, we examined genome-wide DNA methylation patterns in placentas (n = 6 normal placentas per sex/group) and embryos (n = 6 normal female embryos/group; n = 3 delayed female embryos/group) using reduced representation bisulfite sequencing (RRBS). MAIN RESULTS AND THE ROLE OF CHANCE Moderate, but not high dose supplementation, was associated with a decrease in the proportion of developmentally delayed embryos. Although moderate dose folic acid supplementation reduced DNA methylation variance at certain imprinted genes in embryonic and placental tissues, high dose supplementation exacerbated the negative effects of ART at imprinted loci. Furthermore, folic acid supplements resolved female-biased aberrant imprinted gene methylation. Supplementation was more effective at correcting ART-induced genome-wide methylation defects in male versus female placentas; however, folic acid supplementation also led to additional methylation perturbations which were more pronounced in males. LARGE-SCALE DATA The RRBS data from this study have been submitted to the NCBI Gene Expression Omnibus under the accession number GSE123143. LIMITATIONS REASONS FOR CAUTION Although the combination of mouse ART utilised in this study consisted of techniques commonly used in human fertility clinics, there may be species differences. Therefore, human studies, designed to determine the optimal levels of folic acid supplementation for ART pregnancies, and taking into account foetal sex, are warranted. WIDER IMPLICATIONS OF THE FINDINGS Taken together, our findings support moderation in the dose of folic acid supplements taken during ART. STUDY FUNDING/COMPETING INTEREST(S) This work was funded by the Canadian Institutes of Health Research (FDN-148425). The authors declare no conflict of interest.
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Affiliation(s)
- Sophia Rahimi
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada.,Department of Human Genetics, McGill University, 3640 rue University, Montréal QC, Canada
| | - Josée Martel
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada
| | - Gurbet Karahan
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada.,Department of Human Genetics, McGill University, 3640 rue University, Montréal QC, Canada
| | - Camille Angle
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montréal QC, Canada
| | - Nathalie A Behan
- Nutrition Research Division, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa ON, Canada
| | - Donovan Chan
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada
| | - Amanda J MacFarlane
- Nutrition Research Division, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa ON, Canada
| | - Jacquetta M Trasler
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada.,Department of Human Genetics, McGill University, 3640 rue University, Montréal QC, Canada.,Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montréal QC, Canada.,Department of Pediatrics, McGill University, 1001 Décarie Boulevard, Montréal QC, Canada
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Ly L, Chan D, Landry M, Angle C, Martel J, Trasler J. Impact of mothers' early life exposure to low or high folate on progeny outcome and DNA methylation patterns. Environ Epigenet 2020; 6:dvaa018. [PMID: 33240529 PMCID: PMC7673481 DOI: 10.1093/eep/dvaa018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/03/2020] [Accepted: 09/19/2020] [Indexed: 05/14/2023]
Abstract
The dynamic patterning of DNA and histone methylation during oocyte development presents a potentially susceptible time for epigenetic disruption due to early life environmental exposure of future mothers. We investigated whether maternal exposure to folic acid deficient and supplemented diets starting in utero could affect oocytes and cause adverse developmental and epigenetic effects in next generation progeny. Female BALB/c mice (F0) were placed on one of four amino acid defined diets for 4 weeks before pregnancy and throughout gestation and lactation: folic acid control (rodent recommended daily intake; Ctrl), 7-fold folic acid deficient, 10-fold folic acid supplemented or 20-fold folic acid supplemented diets. F1 female pups were weaned onto Ctrl diets, mated to produce the F2 generation and the F2 offspring were examined at E18.5 for developmental and epigenetic abnormalities. Resorption rates were increased and litter sizes decreased amongst F2 E18.5-day litters in the 20-fold folic acid supplemented group. Increases in abnormal embryo outcomes were observed in all three folic acid deficient and supplemented groups. Subtle genome-wide DNA methylation alterations were found in the placentas and brains of F2 offspring in the 7-fold folic acid deficient , 10-fold folic acid supplemented and 20-fold folic acid supplemented groups; in contrast, global and imprinted gene methylation were not affected. The findings show that early life female environmental exposures to both low and high folate prior to oocyte maturation can compromise oocyte quality, adversely affecting offspring of the next generation, in part by altering DNA methylation patterns.
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Affiliation(s)
- Lundi Ly
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Mylène Landry
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Camille Angle
- Department of Pharmacology & Therapeutics, McGill University, Montreal, QC, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Jacquetta Trasler
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
- Department of Pharmacology & Therapeutics, McGill University, Montreal, QC, Canada
- Department of Pediatrics, McGill University, Montreal, QC, Canada
- Correspondence address. Research Institute of the McGill University Health Centre, 1001 Boulevard Décarie, Block E.M.0.3211, Montreal, QC, Canada H4A 3J1. Tel: +1-514-934-1934 (ext. 25235); Fax: +1-514-933-9673; E-mail:
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Whidden L, Martel J, Rahimi S, Chaillet JR, Chan D, Trasler JM. Compromised oocyte quality and assisted reproduction contribute to sex-specific effects on offspring outcomes and epigenetic patterning. Hum Mol Genet 2018; 25:4649-4660. [PMID: 28173052 DOI: 10.1093/hmg/ddw293] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/04/2016] [Accepted: 08/25/2016] [Indexed: 11/13/2022] Open
Abstract
Clinical studies have revealed an increased incidence of growth and genomic imprinting disorders in children conceived using assisted reproductive technologies (ARTs), and aberrant DNA methylation has been implicated. We propose that compromised oocyte quality associated with female infertility may make embryos more susceptible to the induction of epigenetic defects by ART. DNA methylation patterns in the preimplantation embryo are dependent on the oocyte-specific DNA methyltransferase 1o (DNMT1o), levels of which are decreased in mature oocytes of aging females. Here, we assessed the effects of maternal deficiency in DNMT1o (Dnmt1Δ1o/+) in combination with superovulation and embryo transfer on offspring DNA methylation and development. We demonstrated a significant increase in the rates of morphological abnormalities in offspring collected from Dnmt1Δ1o/+ females only when combined with ART. Together, maternal oocyte DNMT1o deficiency and ART resulted in an accentuation of placental imprinting defects and the induction of genome-wide DNA methylation alterations, which were exacerbated in the placenta compared to the embryo. Significant sex-specific trends were also apparent, with a preponderance of DNA hypomethylation in females. Among genic regions affected, a significant enrichment for neurodevelopmental pathways was observed. Taken together, our results demonstrate that oocyte DNMT1o-deficiency exacerbates genome-wide DNA methylation abnormalities induced by ART in a sex-specific manner and plays a role in mediating poor embryonic outcome.
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Affiliation(s)
- Laura Whidden
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
| | - Josée Martel
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Sophia Rahimi
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - J Richard Chaillet
- Department of OB/GYN and Reproductive Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Donovan Chan
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Jacquetta M Trasler
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada,Department of Human Genetics, McGill University, Montreal, QC, Canada,Department of Pediatrics, McGill University, Montreal, QC, Canada
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17
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Chevallier J, Martel J. [Dartres (herpes simplex): an attempt at historical exploration]. Ann Dermatol Venereol 2014; 141:298-305. [PMID: 24703646 DOI: 10.1016/j.annder.2014.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 02/04/2014] [Accepted: 02/13/2014] [Indexed: 11/28/2022]
Affiliation(s)
- J Chevallier
- 1, chemin Tony-Garnier, 69120 Vaulx-en-Velin, France.
| | - J Martel
- 1140, rue de Sonnaz, 73000 Chambéry, France
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18
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McGraw S, Oakes CC, Martel J, Cirio MC, de Zeeuw P, Mak W, Plass C, Bartolomei MS, Chaillet JR, Trasler JM. Loss of DNMT1o disrupts imprinted X chromosome inactivation and accentuates placental defects in females. PLoS Genet 2013; 9:e1003873. [PMID: 24278026 PMCID: PMC3836718 DOI: 10.1371/journal.pgen.1003873] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 08/28/2013] [Indexed: 01/04/2023] Open
Abstract
The maintenance of key germline derived DNA methylation patterns during preimplantation development depends on stores of DNA cytosine methyltransferase-1o (DNMT1o) provided by the oocyte. Dnmt1omat−/− mouse embryos born to Dnmt1Δ1o/Δ1o female mice lack DNMT1o protein and have disrupted genomic imprinting and associated phenotypic abnormalities. Here, we describe additional female-specific morphological abnormalities and DNA hypomethylation defects outside imprinted loci, restricted to extraembryonic tissue. Compared to male offspring, the placentae of female offspring of Dnmt1Δ1o/Δ1o mothers displayed a higher incidence of genic and intergenic hypomethylation and more frequent and extreme placental dysmorphology. The majority of the affected loci were concentrated on the X chromosome and associated with aberrant biallelic expression, indicating that imprinted X-inactivation was perturbed. Hypomethylation of a key regulatory region of Xite within the X-inactivation center was present in female blastocysts shortly after the absence of methylation maintenance by DNMT1o at the 8-cell stage. The female preponderance of placental DNA hypomethylation associated with maternal DNMT1o deficiency provides evidence of additional roles beyond the maintenance of genomic imprints for DNA methylation events in the preimplantation embryo, including a role in imprinted X chromosome inactivation. During oocyte growth and maturation, vital proteins and enzymes are produced to ensure that, when fertilized, a healthy embryo will arise. When this natural process is interrupted, one or more of these essential elements can fail to be produced thus compromising the health of the future embryo. We are using a mouse model, lacking an enzyme (DNMT1o) produced in the oocyte and only required post-fertilization in the early embryo for the maintenance of inherited DNA methylation marks. Here, we reveal that oocytes lacking DNMT1o, when fertilized, generated conceptuses with a wide variety of placental abnormalities. These placental abnormalities were more frequent and severe in females, and showed specific genomic regions constantly deprived of their normal methylation marks. The affected genomic regions were concentrated on the X chromosome. Interestingly, we also found that a region important for the regulation of the X chromosome inactivation process was hypomethylated in female blastocysts and was associated with sex-specific abnormalities in the placenta, relaxation of imprinted X chromosome inactivation, and disruption of DNA methylation later in development. Our findings provide a novel unanticipated role for DNA methylation events taking place within the first few days of life specifically in female preimplantation embryos.
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Affiliation(s)
- Serge McGraw
- Departments of Pharmacology & Therapeutics, Pediatrics and Human Genetics, Research Institute at The Montreal Children's Hospital of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada
| | - Christopher C. Oakes
- Department of Epigenomics and Cancer Risk Factors, The German Cancer Research Center, Heidelberg, Baden-Württemberg, Germany
| | - Josée Martel
- Departments of Pharmacology & Therapeutics, Pediatrics and Human Genetics, Research Institute at The Montreal Children's Hospital of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada
| | - M. Cecilia Cirio
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Pauline de Zeeuw
- Departments of Pharmacology & Therapeutics, Pediatrics and Human Genetics, Research Institute at The Montreal Children's Hospital of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada
| | - Winifred Mak
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Christoph Plass
- Department of Epigenomics and Cancer Risk Factors, The German Cancer Research Center, Heidelberg, Baden-Württemberg, Germany
| | - Marisa S. Bartolomei
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - J. Richard Chaillet
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Jacquetta M. Trasler
- Departments of Pharmacology & Therapeutics, Pediatrics and Human Genetics, Research Institute at The Montreal Children's Hospital of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada
- * E-mail:
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19
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Martel J. Histoire du peigne. Ann Dermatol Venereol 2012; 139:157-60. [DOI: 10.1016/j.annder.2011.12.001] [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] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Asenjo B, Martel J, Pérez Rodrigo S, Ferrando J. Caso de neurorradiología presentado en la Sesión General de Lectura de Casos del XXX Congreso Nacional de la SERAM, A Coruña. Mayo 2010. Radiología 2010; 52:563-6. [DOI: 10.1016/j.rx.2010.08.003] [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] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Accepted: 08/10/2010] [Indexed: 11/26/2022]
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Bouzas R, Pérez Rodrigo S, Martel J, Cuartero V. Caso de abdomen presentado en la Sesión General de Lectura de Casos del XXX Congreso Nacional de la SERAM, A Coruña. Mayo 2010. Radiología 2010; 52:570-1. [DOI: 10.1016/j.rx.2010.08.002] [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] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Accepted: 08/10/2010] [Indexed: 11/25/2022]
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22
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Albillos J, Martel J, Bueno Á, Pérez Rodrigo S. Caso de pediatría presentado en la Sesión General de Lectura de Casos del XXX Congreso Nacional de la SERAM, A Coruña. Mayo 2010. Radiología 2010; 52:575-7. [DOI: 10.1016/j.rx.2010.08.006] [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] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Accepted: 08/10/2010] [Indexed: 11/28/2022]
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Fortier AL, Lopes FL, Darricarrère N, Martel J, Trasler JM. Superovulation alters the expression of imprinted genes in the midgestation mouse placenta. Hum Mol Genet 2008; 17:1653-65. [PMID: 18287259 DOI: 10.1093/hmg/ddn055] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Imprinted genes play important roles in embryonic growth and development as well as in placental function. Many imprinted genes acquire their epigenetic marks during oocyte growth, and this period may be susceptible to epigenetic disruption following hormonal stimulation. Superovulation has been shown to affect growth and development of the embryo, but an effect on imprinted genes has not been shown in postimplantation embryos. In the present study, we examined the effect of superovulation/in vivo development or superovulation/3.5dpc (days post-coitum) embryo transfer on the allelic expression of Snrpn, Kcnq1ot1 and H19 in embryos and placentas at 9.5 days of gestation. Superovulation followed by in vivo development resulted in biallelic expression of Snrpn and H19 in 9.5dpc placentas while Kcnq1ot1 was not affected; in the embryos, there was normal monoallelic expression of the three imprinted genes. We did not observe significant DNA methylation perturbations in the differentially methylated regions of Snrpn or H19. Superovulation followed by embryo transfer at 3.5dpc resulted in biallelic expression of H19 in the placenta. The expression of an important growth factor closely linked to H19, Insulin-like growth factor-II, was increased in the placenta following superovulation with or without embryo transfer. These results show that both maternally and paternally methylated imprinted genes were affected, suggesting that superovulation compromises oocyte quality and interferes with the maintenance of imprinting during preimplantation development. Our findings contribute to the evidence that mechanisms for maintaining imprinting are less robust in trophectoderm-derived tissues, and have clinical implications for the screening of patients following assisted reproduction.
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Affiliation(s)
- Amanda L Fortier
- Department of Human Genetics, McGill University, Montreal Children's Hospital Research Institute, Montreal, Quebec, Canada
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Martel J, Bueno A, Domínguez MP, Llorens P, Quirós J, Delgado C. Percutaneous radiofrequency ablation: relationship between different probe types and procedure time on length and extent of osteonecrosis in dog long bones. Skeletal Radiol 2008; 37:147-52. [PMID: 18038230 DOI: 10.1007/s00256-007-0416-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [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: 05/23/2007] [Revised: 09/07/2007] [Accepted: 10/17/2007] [Indexed: 02/02/2023]
Abstract
PURPOSE We have been using radiofrequency ablation for the percutaneous treatment of osteoid osteoma since 2001. Frequently, lesions are located near the joint surface, involve the vertebral body or are close to major nerves. We seek to determine whether radiofrequency ablation (RFA) can be used safely in these cases. MATERIALS AND METHODS A total of 65 lesions were induced in 4 dogs. Each dog underwent RFA on the diaphysis of long bones, as well as femoral and humeral heads. Four different sessions were carried out by using 1- and 2-cm probes with or without a cool-tip system and by varying the timing of the procedure. Plain film, CT, and MRI were obtained. All bone samples were examined histologically. RESULTS The dogs' activity after the procedure was normal. No pathologic fractures occurred despite unrestricted activity of the animals. Cortical bone was always respected; therefore, articular cartilage has not been damaged. Radiological findings were characteristic. There were no significant differences in lesion size, probe type, and the duration of the procedure. The mean lesion diameter perpendicular to the electrode was 18.5 mm. CONCLUSIONS Our study confirms the insulative effect of cortical bone. RFA can be safely performed close to the joint surface without damaging the cartilage.
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Affiliation(s)
- J Martel
- Departamento de Diagnóstico por Imagen, Fundación Hospital Alcorcón, Avda. de Budapest s/n, 28922 Alcorcón, Madrid, Spain.
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Garamendi JF, Malpica N, Martel J, Schiavi E. Automatic Segmentation of the Liver in CT Using Level Sets Without Edges. Pattern Recognition and Image Analysis 2007. [DOI: 10.1007/978-3-540-72847-4_22] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fortier AL, Lopes FL, Martel J, Trasler JM. The effect of superovulation on methylation and expression of imprinted genes in pre- and post-implantation mouse embryos. Dev Biol 2007. [DOI: 10.1016/j.ydbio.2007.03.371] [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] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lucifero D, Suzuki J, Bordignon V, Martel J, Vigneault C, Therrien J, Filion F, Smith LC, Trasler JM. Bovine SNRPN methylation imprint in oocytes and day 17 in vitro-produced and somatic cell nuclear transfer embryos. Biol Reprod 2006; 75:531-8. [PMID: 16790688 DOI: 10.1095/biolreprod.106.051722] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [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: 01/19/2023] Open
Abstract
Findings from recent studies have suggested that the low survival rate of animals derived via somatic cell nuclear transfer (SCNT) may be in part due to epigenetic abnormalities brought about by this procedure. DNA methylation is an epigenetic modification of DNA that is implicated in the regulation of imprinted genes. Genes subject to genomic imprinting are expressed monoallelically in a parent of origin-dependent manner and are important for embryo growth, placental function, and neurobehavioral processes. The vast majority of imprinted genes have been studied in mice and humans. Herein, our objectives were to characterize the bovine SNRPN gene in gametes and to compare its methylation profile in in vivo-produced, in vitro-produced, and SCNT-derived Day 17 elongating embryos. A CpG island within the 5' region of SNRPN was identified and examined using bisulfite sequencing. SNRPN alleles were unmethylated in sperm, methylated in oocytes, and approximately 50% methylated in somatic samples. The examined SNRPN region appeared for the most part to be normally methylated in three in vivo-produced Day 17 embryos and in eight in vitro-produced Day 17 embryos examined, while alleles from Day 17 SCNT embryos were severely hypomethylated in seven of eight embryos. In this study, we showed that the SNRPN methylation profiles previously observed in mouse and human studies are also conserved in cattle. Moreover, SCNT-derived Day 17 elongating embryos were abnormally hypomethylated compared with in vivo-produced and in vitro-produced embryos, which in turn suggests that SCNT may lead to faulty reprogramming or maintenance of methylation imprints at this locus.
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Affiliation(s)
- Diana Lucifero
- McGill University and Montreal Children's Hospital Research Institute, Montreal, Quebec, Canada
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Martel J. [Mohs micrographical surgery]. Ann Dermatol Venereol 2004; 131:285-6. [PMID: 15107750 DOI: 10.1016/s0151-9638(04)93595-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tenenhouse HS, Martel J, Gauthier C, Segawa H, Miyamoto KI. Differential effects of Npt2a gene ablation and X-linked Hyp mutation on renal expression of Npt2c. Am J Physiol Renal Physiol 2003; 285:F1271-8. [PMID: 12952859 DOI: 10.1152/ajprenal.00252.2003] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.9] [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: 11/22/2022] Open
Abstract
The present study was undertaken to define the mechanisms governing the regulation of the novel renal brush-border membrane (BBM) Na-phosphate (Pi) cotransporter designated type IIc (Npt2c). To address this issue, the renal expression of Npt2c was compared in two hypophosphatemic mouse models with impaired renal BBM Na-Pi cotransport. In mice homozygous for the disrupted Npt2a gene (Npt2-/-), BBM Npt2c protein abundance, relative to actin, was increased 2.8-fold compared with Npt2+/+ littermates, whereas a corresponding increase in renal Npt2c mRNA abundance, relative to beta-actin, was not evident. In contrast, in X-linked Hyp mice, which harbor a large deletion in the Phex gene, the renal abundance of both Npt2c protein and mRNA was significantly decreased by 80 and 50%, respectively, relative to normal littermates. Pi deprivation elicited a 2.5-fold increase in BBM Npt2c protein abundance in Npt2+/+ mice but failed to elicit a further increase in Npt2c protein in Npt2-/- mice. Pi restriction led to an increase in BBM Npt2c protein abundance in both normal and Hyp mice without correcting its renal expression in the mutants. In summary, we report that BBM Npt2c protein expression is differentially regulated in Npt2-/- mice and Hyp mice and that the Npt2c response to low-Pi challenge differs in both hypophosphatemic mouse strains. We demonstrate that Npt2c protein is maximally upregulated in Npt2-/- mice and suggest that Npt2c likely accounts for residual BBM Na-Pi cotransport in the knockout model. Finally, our data indicate that loss of Phex function abrogates renal Npt2c protein expression.
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Martel J. [Adrien Doyon (1827-1907). Creator of the Annals, but also well-known balneologist and European scholar]. Ann Dermatol Venereol 2003; 130:1088-91. [PMID: 14724554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
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Martel J, Roux JJ, Treilleux I, Bouchet P, Froger X, Mechin-Cretinon I. [Breast metastases of an ovarian adenocarcinoma]. Ann Dermatol Venereol 2003; 130:623-5. [PMID: 13679699] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
Abstract
INTRODUCTION Breast metastases are rare. Primary tumors are cutaneous, pulmonary, digestive and prostatic. A malignant tumor of the ovary is rarely responsible. OBSERVATION A 69-year-old women presented a voluminous unilateral mastitis in a poly-metastatic context 3 years after the discovery of an ovarian adenocarcinoma. The anatomo-pathological examination confirmed the ovarian origin of the breast nodules observed. Progression was poor and the patient died 8 months after the first clinical signs in the breast. COMMENTS The difficulty in differentiating a primary from a secondary carcinomatous mastitis is enhanced when the primary cancer is unknown. In our patient, the immunohistochemical study did not discriminate between the breast and ovarian origin. The diagnosis was finally made on the basis of standard histology and the anatomoclinical correlation. Since immunohistochemical examinations may not be specific enough, such as was the case in our patient, the anatomoclinical confrontation is essential.
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Affiliation(s)
- J Martel
- Unité de Dermatologie, Centre Hospitalier de Chambéry.
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Raux-Rakotomalala F, Houliat T, Martel J, Stoll D, Bébéar JP, Darrouzet V. [Adenoid cystic carcinoma of the head and neck: a review of 30 cases]. Rev Laryngol Otol Rhinol (Bord) 2003; 124:235-41. [PMID: 15038566] [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] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
OBJECTIVES To evaluate treatment results and identify prognostics factors which determine local and regional treatment failure and crude survival in adenoid cystic tumours (ACT) in the head and neck. METHODS A retrospective study (1984 to 2001) of 30 cases of adenoid cystic tumour. The mean age was 56.9 years, with a sex ratio female to male of 2:1. Tumours of all sites were encountered, most (26.7%) being in the nose and sinuses and major salivary glands (26.6%). Tumours at the T4 stage were found in 14 cases, mainly situated in the nose and sinuses (50%). No patient had cervical lymphadenopathy, while two patients (6.7%) had bony metastases at the time of diagnosis. Two patients (6.7%) were treated by surgery alone, for T1 and T2 tumours; four patients (13%) had radiotherapy alone, and 24 patients (80%) had surgery with post-operative radiotherapy with a mean dose of 60.3 Grays (56-65 Grays). RESULTS Local recurrence occurred in 30.8% (nine cases) after a mean interval of 43 months (1 to 10 years). Treatment of these recurrences was by revision surgery in six cases, leading to local control in one case, but in a patient with pulmonary metastases. No cases of lymph node recurrence were observed. 30% of patients developed metastases; these were pulmonary in 44% and bony in 33.3%. Mean follow-up was five years. Crude survival at 3 years was 91%, at 5 years 86%, and at 10 years 50%. The percentage tumour-free survival was 70% at 3 years, and 57% at 5 years. 22 patients (73.3%) are still alive, 17 of them recurrence-free. Analysis of the prognostic factors has shown tumour to be more aggressive in the nose and sinuses when they presented at an advanced stage (T4); recurrence was more common when excision was incomplete, or if there was peri-neural spread. Tumours of "massive" histological type carried a poorer prognosis than those of cribrigorm type (60% death compared with 10%). The development of metastases is independent of local recurrence. Metastases to bone appear to be more rapidly aggressive than pulmonary metastases, which may remain asymptomatic for some time. CONCLUSION Combined radiotherapy and surgery have allowed improved local control of ACT, but the therapeutic challenge remains the multiply recurrent ACT, or those with symptomatic metastases, and this despite new research techniques (neutral therapy, immuno-histochemistry, molecular biology). ACT are rare tumours, whose prognosis remains poor.
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Affiliation(s)
- F Raux-Rakotomalala
- CHU Pellegrin, Service d'ORL, Place Amélie Raba-Léon, F-33076 Bordeaux, France.
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Lukasiewicz E, Martel J, Roujeau JC, Flahault A. [Dermatology in private practice in France in 2000]. Ann Dermatol Venereol 2002; 129:1261-5. [PMID: 12514513] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVES Data regarding French dermatological practice are scarce. Our objective was to identify the skin disorders most commonly diagnosed by office-based dermatologists. We also documented the severity of these skin disorders, as reflected by the repercussions on patient's everyday life, and the way physicians managed patients. DESIGN We carried out a one-day survey of visits to a randomly selected sample of 900 French office-based dermatologists. The randomization was stratified according to the five French different dialing area codes. RESULTS Office-based dermatologists saw 6411 patients with 7839 skin disorders during the survey. The daily number of visits to French dermatologists was estimated at 47 000 and the annual number between 12 and 14 millions. Office-based dermatologists mostly managed warts, acne, nevus, dermatitis, malignancies and pre-malignancies, fungal infection and psoriasis. Repercussions on patients'everyday life were assessed by physicians as important or very important in 28 p. 100 of cases. Half of the patients received topical treatment, 20.5 p. 100 a systemic drug and 40 p. 100 a minor surgical procedure (including cryotherapy). CONCLUSION Although dermatologists frequently see benign skin disorders such as warts or nevus, more severe diseases represent an important part of their activity.
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Affiliation(s)
- E Lukasiewicz
- Inserm unité 444, Faculté de Médecine Saint-Antoine, Paris, France.
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Marqués R, Martel J, Mesa F, Medina F. Left-handed-media simulation and transmission of EM waves in subwavelength split-ring-resonator-loaded metallic waveguides. Phys Rev Lett 2002; 89:183901. [PMID: 12398601 DOI: 10.1103/physrevlett.89.183901] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2002] [Indexed: 05/24/2023]
Abstract
At microwave frequencies, hollow metallic waveguides behave in certain aspects as a "one-dimensional plasma." This feature will be advantageously used for simulating the propagation of electromagnetic (EM) waves in left-handed metamaterials provided the hollow waveguide is periodically loaded with split ring resonators. It will be shown that EM transmission in this structure is feasible within a certain frequency band even if the transverse dimensions of the waveguide are much smaller than the associated free-space wavelength. This effect can be qualitatively and quantitatively explained by the left-handed metamaterial theory, thus providing a new experimental validation for such a theory.
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Affiliation(s)
- R Marqués
- Departamento de Electrónica y Electromagnetismo, Universidad de Sevilla, 41012 Sevilla, Spain.
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Tenenhouse HS, Gauthier C, Martel J, Hoenderop JGJ, Hartog A, Meyer MH, Meyer RA, Bindels RJM. Na/P(i) cotransporter ( Npt2) gene disruption increases duodenal calcium absorption and expression of epithelial calcium channels 1 and 2. Pflugers Arch 2002; 444:670-6. [PMID: 12194021 DOI: 10.1007/s00424-002-0865-2] [Citation(s) in RCA: 20] [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] [Received: 03/08/2002] [Revised: 04/24/2002] [Accepted: 04/25/2002] [Indexed: 11/24/2022]
Abstract
Mice homozygous for the disrupted type-II Na/P(i) cotransporter gene ( Npt2(-/-)) exhibit hypophosphataemia, increased serum concentration of 1,25-dihydroxyvitamin D (1,25-(OH)(2)D) and calcium (Ca) and elevated urinary Ca excretion. To determine whether the hypercalcaemia and hypercalciuria are secondary to 1,25-(OH)(2)D-stimulated intestinal Ca absorption, we examined the effect of Npt2 gene disruption on serum Ca and urinary Ca excretion after an overnight fast, and on duodenal Ca absorption. We also compared the duodenal expression of the epithelial Ca channels, ECaC1 and ECaC2, and calbindinD(9K) mRNAs, relative to that of beta-actin mRNA, in Npt2(+/+) and Npt2(-/-) mice. Both serum Ca and urine Ca/creatinine were significantly decreased in Npt2(-/-) mice after an overnight fast and were no longer different from that in wild-type mice. Absorption of (45)Ca from isolated duodenal segments in vivo and (45)Ca appearing in the plasma were significantly increased in Npt2(-/-) compared with Npt2(+/+) mice. In addition, the duodenal abundance of ECaC1, ECaC2 and calbindinD(9K) mRNAs was significantly elevated in mutant mice relative to that in wild-type mice. In contrast, both duodenal Ca absorption and ECaC1 and ECaC2 mRNA abundance were lower in mice with X-linked hypophosphataemia ( Hyp) than in normal littermates. In summary, we provide evidence for increased duodenal Ca absorption in Npt2(-/-) mice and suggest a role for ECaC1, ECaC2 and calbindinD(9K) in mediating this response.
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Affiliation(s)
- Harriet S Tenenhouse
- Department of Pediatrics, McGill University-Montreal Children's Hospital Research Institute, 2300 Tupper Street, Montreal, Quebec H3H 1P3, Canada.
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Charette AB, Grenon M, Lemire A, Pourashraf M, Martel J. Practical and highly regio- and stereoselective synthesis of 2-substituted dihydropyridines and piperidines: application to the synthesis of (-)-coniine. J Am Chem Soc 2001; 123:11829-30. [PMID: 11716753 DOI: 10.1021/ja017136x] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A B Charette
- Département de Chimie, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec, H3C 3J7, Canada
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Martel J. Examining the foreseeable: assisted suicide as a herald of changing moralities. Soc Leg Stud 2001; 10:147-170. [PMID: 11942336 DOI: 10.1177/a017399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
After her intense battle for the decriminalization of assisted suicide in the Supreme Court of Canada, Sue Rodriguez committed suicide with medical assistance in 1994. Following her suicide, government and law representatives remained silent and no criminal charges were ever brought against the person(s) who presumably assisted Ms Rodriguez in her death. This apparent non-intervention of criminal law is examined in view of the useful role that the Rodriguez event may have played in a possible shift in the dominant morality. It is argued that the Rodriguez assisted suicide may have been a useful 'crime' (in the Durkheimian sense) in that it brought to the fore the possibility that social conditions--which made the 'crime' possible--may no longer be in harmony with conventional morality. Similarly to Socrates' crime, the Rodriguez case can be seen as an anticipation of a new morality. It can be analyzed as a prelude to alterations, as directly preparing the way for changes in the dominant morality. The role of criminal law as a preferred mode of moral regulation is also examined in relation to the moral demands and expectations that arose during as well as after the judicial saga.
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Martel J, Darrouzet V, Duclos JY, Bébéar JP, Stoll D. [Olfactory esthesioneuromas]. Rev Laryngol Otol Rhinol (Bord) 2001; 121:227-36. [PMID: 11233705] [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] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Olfactory neuroblastomas are rare malignant tumours of the nose arising from the olfactory epithelium. In a retrospective series of 18 cases and a review of the literature, the authors establish the main features of this tumour. They emphasise the difficulties of histological examination, often requiring immuno-cyt-chemistery and electron microscopy. They point out the value of a new classification, and confirm treatments being radio-surgical, with use of the combined rhino-neurosurgical approach when there is extension to the cribriform plate. They report a 5-year survival of 91.5%, with 87.5% at 10 years. The high incidence of lymph gland metastases (16.6%) is greater than that of local recurrence (11%) especially in the more advanced cases. The question of prophylactic treatment of the neck nodes is one to be considered.
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Affiliation(s)
- J Martel
- C.H.U. Pellegrin, Clinique Universitaire O.R.L., Place Amélie Raba Léon, 33076 Bordeaux, France
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Bonnet S, Mercié P, Lacape G, Viallard JF, Faure I, Martel J, Couzi L, Leng B, Pellegrin JL. [Macro-CK disclosing disseminated epidermoid carcinoma of the pyriform sinus in a patient with dermatomyositis]. Rev Med Interne 2001; 22:292-6. [PMID: 11270273 DOI: 10.1016/s0248-8663(00)00331-3] [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: 10/18/2022]
Abstract
INTRODUCTION The association between dermatomyositis and cancer is clearly established, but its frequency remains difficult to define. EXEGESIS We report the case of an association between a dermatomyositis and a cancer of the piriform antrum. Four months after surgical treatment and radiotherapy, the increased macro-CK level gave us reason to suspect a cancer relapse with pulmonary, hepatic, splenic and renal metastases without progressive clinical signs. CONCLUSION Mitochondrial macro-CK detection must evoke the presence of neoplasia with or without metastasis, which would be a poor prognosis, as has been shown in our patient.
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Affiliation(s)
- S Bonnet
- Clinique de médecine interne et maladies infectieuses, hôpital Haut-Lévêque, 5, avenue de Magellan, 33604 Pessac, France
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Tenenhouse HS, Martel J, Gauthier C, Zhang MY, Portale AA. Renal expression of the sodium/phosphate cotransporter gene, Npt2, is not required for regulation of renal 1 alpha-hydroxylase by phosphate. Endocrinology 2001; 142:1124-9. [PMID: 11181527 DOI: 10.1210/endo.142.3.8029] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Several reports have suggested that the regulation of renal 1,25-dihydroxyvitamin D [1,25-(OH)(2)D] synthesis by extracellular phosphate (Pi) is dependent on normal transepithelial Pi transport by the renal tubule. Mice homozygous for the disrupted Na/Pi cotransporter gene Npt2 (Npt2(-/-)) exhibit renal Pi wasting, an approximately 85% decrease in renal brush border membrane Na/Pi cotransport, hypophosphatemia, and an increase in serum 1,25-(OH)(2)D concentration. We undertook 1) to determine the mechanism for the increased circulating levels of 1,25-(OH)(2)D in Npt2(-/-) mice and 2) to establish whether renal 1alpha-hydroxylase was appropriately regulated by dietary Pi in the absence of Npt2 gene expression. On a control diet, the 2.5-fold increase in the serum 1,25-(OH)(2)D concentration in Npt2(-/-) mice, relative to that in Npt2(+/+) littermates, is associated with a corresponding increase in renal mitochondrial 25-hydroxyvitamin D-1 alpha-hydroxylase (1 alpha-hydroxylase) activity and messenger RNA (mRNA) abundance. A low Pi diet elicits an increase in serum 1,25-(OH)(2)D concentration, renal 1alpha-hydroxylase activity, and mRNA abundance in Npt2(+/+) and Npt2(-/-) mice to similar levels in both mouse strains. A high Pi diet has no effect on serum 1,25-(OH)(2)D concentration, renal 1 alpha-hydroxylase activity, or mRNA abundance in Npt2(+/+) mice, but normalizes these parameters in Npt2(-/-) mice. In addition, renal 24-hydroxylase mRNA abundance is significantly reduced in Npt2(-/-) mice compared with that in Npt2(+/+) mice under all dietary conditions. In summary, we demonstrate that 1) increased renal synthesis of 1,25-(OH)(2)D is responsible for the increased serum 1,25-(OH)(2)D concentration in Npt2(-/-) mice; and 2) renal 1alpha-hydroxylase gene expression is appropriately regulated by dietary manipulation of serum Pi in both Npt2(+/+) and Npt2(-/-) mice. Thus, intact renal Na/Pi cotransport is not required for the regulation of renal 1alpha-hydroxylase by Pi.
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Affiliation(s)
- H S Tenenhouse
- Department of Pediatrics, McGill University-Montreal Children's Hospital Research Institute, Montréal, Québec, Canada H3H 1P3.
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Abstract
Maxillary sinus hypoplasia is rare, with an estimated prevalence of 1-5%. Out of the CT scans performed in sinusal patients between March 1998 and June 1999, we report on 4 isolated maxillary sinus hypoplasia, 4 maxillary sinus hypoplasia associated to concha bullosa, and 10 isolated conchae bullosas. All cases were evaluated by nasosinusal endoscopy and CT scan. Size, location and uni/bilateral presentation of concha bullosa is correlated to maxillary sinus hypoplasia presence, specially with regards to uncinate process presence, medial or lateral retraction. The pathogenesis of maxillary sinus hypoplasia is reviewed, and its relation to concha bullosa, evaluating how this could explain some cases of the so called chronic maxillary sinus atelectasia, as an acquired and progressive variant of maxillary sinus hypoplasia in adults.
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Affiliation(s)
- G Plaza
- Unidad de Otorrinolaringología, Fundación Hospital Alcorcón, Madrid
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Martel J, Faisant M, Lebeau B, Pinel C, Feray C, Feuilhade M. [Subcutaneous mycosis due to Scopulariopsis brevicaulis in an immunocompromised patient]. Ann Dermatol Venereol 2001; 128:130-3. [PMID: 11275588] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
BACKGROUND Scopulariopsis brevicaulis is a causal agent of onchomycosis. We report the unusual clinical manifestations caused by this opportunist fungus. CASE REPORT A 61-year-old man consulted in February 1997 for a budding lesion located on the right medial malleolus. This patient had had a liver transplantation for primary biliary cirrhosis in 1990 and had been taking prednisone and cyclosporine since this time. Cyclosporine had been recently replaced by tacrolimus. The histology examination of a lesion specimen taken from the ankle evidenced a dermal mycosis due to opportunist filamentous fungus. Total excision was performed. The patient then developed nodular lesions of the left elbow during the summer of 1997. Mycology culture of a skin biopsy grew numerous colonies of Scopulariopsis brevicaulis. Excision of the elbow lesion was delayed due to hospitalization for suspected graft rejection and development of insulin-dependent diabetes. The elbow lesion was then resected followed by a skin graft. The mycology examination identified the same causal agent. DISCUSSION This liver transplant recipient developed two unusual extra-ungual localizations (ankle and elbow) of a Scopulariopsis brevicaulis infection. Chronic immunosuppression favored development of the infection with a pseudo-epithéliomatous presentation. The histology and mycology examinations were necessary for positive diagnosis.
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Affiliation(s)
- J Martel
- 2, rue Claude Martin, 73000 Chambéry
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Martel J, Duclos JY, Darrouzet V, Guyot M, Bébéar JP. [Malignant or necrotizing otitis externa: experience in 22 cases]. Ann Otolaryngol Chir Cervicofac 2000; 117:291. [PMID: 11084403] [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] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Malignant or progressive necrotizing otitis extrema is an uncommon but severe infectious condition of the external auditory canal. Over a period of four years, we treated 22 patients: 60% had diabetes (1/4 insulin dependent) and 13% were immunodepressed. The causal germ was Pseudomonas aeruginosa in 87% of cases. The pretherapeutic work-up included a computed tomography scan and a technetium scintigraphy to confirm diagnosis and assess extension. Repeated scintigraphies with gallium were used to follow the course under treatment. Medical treatment was used in most cases (16/22) with parenteral antibiotic therapy using a third-generation cephalosporin (ceftazidime or ceftriaxone) and a fluoroquinolone (ciprofloxacin or ofloxacin) and, if there was no contraindication, hyperbaric oxygen. Surgery is not indicated in malignant otitis externa. We had a 95% cure rate with only 10% recurrence. We reviewed the data in the literature on malignant otitis externa and present the important diagnostic, imaging and therapeutic aspects.
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Affiliation(s)
- J Martel
- Service d'ORL et de chirurgie cervico-faciale, Service de médecine nucléaire, Hôpital Pellegrin C.H.U. de Bordeaux, 33076 Bordeaux Cedex
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Martel J, Després N, Ahnadi CE, Lachance JF, Monticello JE, Fink G, Ardemagni A, Banfi G, Tovey J, Dykes P, John R, Jeffery J, Grant AM. Comparative multicentre study of a panel of thyroid tests using different automated immunoassay platforms and specimens at high risk of antibody interference. Clin Chem Lab Med 2000; 38:785-93. [PMID: 11071074 DOI: 10.1515/cclm.2000.112] [Citation(s) in RCA: 21] [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: 11/15/2022]
Abstract
The introduction of automation for immunoassays in recent years has brought about important and evident improvements in assay precision. Increasing standardization and comparability between platforms should enable the development of clinical guidelines and diagnostic algorithms for appropriate clinical decision making. A continuing source of variation between different automated immunoassay platforms is the sporadic effect of interfering antibodies or substances, thus causing aberrant results not supporting the patient's clinical status. The aim of this study was to describe current thyroid panel variation between automated immunoassay platforms including population specimens at risk of antibody interference. A multisite design with laboratories in three different countries using four different automated immunoassay platforms (Roche-Boehringer Mannheim Elecsys (Italy), Roche-Boehringer Mannheim ES300 (Wales), Bayer Immuno 1 and the Bayer ACS:180 evaluated the thyroid panel of thyrotropin (TSH), triiodothyromine (T3), free thyroxine (FT4) and free triiodothyronine (FT3). A common set of 158 randomly selected patient samples of non-thyroid and thyroid disorders, with and without treatment, was tested. Included were 62 patient samples at risk for endogenous antibody interference with high antimicrosomal antibody, anti-TSH receptor antibody and increased rheumatoid factor sub-populations. Across all controls and between platforms, precision measurements were comparable and varied between 0.7% and 12.8% for TSH, 2.8% and 13% for FT4, 1.8% and 10.5% for FT3 and 3.1% and 16% for T3 assay. Acceptable correlation and reproducibility were found between the three Bayer Immuno 1 platforms at each country's site with all four thyroid panel assays demonstrating r-values of 0.989 to 1.000 and slopes of 0.915 to 1.078. Comparisons between the different platforms showed acceptable correlation for all thyroid panel assays. Specimens containing rheumatoid factor were associated with a significantly increased variation between systems for the FT4 and FT3 assays (p < 0.01). This effect did not appear to be selective for a given platform. For specimens with raised autoimmune antibodies and therefore at risk of assay antibody interference, no variation could be observed between the platforms.
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Affiliation(s)
- J Martel
- Centre for Research and Evaluation in Diagnostics, Department of Clinical Biochemistry, Centre Hospitalier Universitaire de Sherbrooke, Qc, Canada
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Martel J, Dieny A, Blanc M, Rogeaux O, Jeanneret J, Berger F. [Ecchymotic aeras to biopsy]. Ann Dermatol Venereol 2000; 127:751-2. [PMID: 11011173] [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: 02/17/2023]
Affiliation(s)
- J Martel
- Centre Hospitalier de Chambéry, BP 1125, 73011 Chambéry Cedex
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Duclos JY, Darrouzet V, Martel J, Berge J, Calas V, Bébéar JP. [Abnormal trajectory of the internal carotid artery in the middle ear. Report of a case]. Rev Laryngol Otol Rhinol (Bord) 2000; 121:187-92. [PMID: 11109886] [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] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
The authors report a case with an aberrant course of the internal carotid artery within the middle ear--a rare abnormality with only about fifty cases so far reported in the literature. The combination of pulsatile tinnitus and a retro-tympanic mass calls for a precise anatomical investigation of the temporal bone before any surgery is undertaken. The role of the various complementary investigations is discussed. A high resolution CT scan is the key investigation, and is sufficient to give the diagnosis in the majority of cases. Angio-MRI currently affords the possibility of confirming this vascular malpositioning in a non-invasive way. Arteriography should be used only when there is remaining doubt about the possibility of a glomus tumour, or before treatment by clamping. The most logical course to adopt would seem to us to be to abstain from treatment once this diagnosis has been made, given the risk of major haemorrhage and the potential neurological complications.
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Affiliation(s)
- J Y Duclos
- C.H.U. Pellegrin, Clinique ORL et CCF, Tripode, Bordeaux, France
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47
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Lappalainen JH, Martel J, Lempa K, Wilsey B, Ossipov V. Effects of Resource Availability on Carbon Allocation and Developmental Instability in Cloned Birch Seedlings. Int J Plant Sci 2000; 161:119-125. [PMID: 10648201 DOI: 10.1086/314228] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Abundant nitrogen improves seedling growth and establishment. Vigorous growth brings about changes in rates and patterns of plant development and changes in the relationship between primary and secondary metabolism, which may make seedlings more susceptible to herbivores and pathogens than are slow-growing seedlings. We studied how nitrogen fertilization and manual defoliation of source leaves affect growth, carbon allocation, and developmental instability in cloned seedlings of white birch (Betula pubescens Ehrh.). Biomass was higher, whereas concentrations of most classes of phenolic compounds were lower in the nitrogen-rich environment. Interestingly, fertilization did not change the concentrations of cell wall-bound proanthocyanidins, which represent an important fraction of the group of phenolic compounds. Nitrogen enrichment increased levels of fluctuating asymmetry, an index of developmental instability. This result confirms that not only stress but also any deviation from normal resource availability may increase leaf developmental instability in birches. In contrast to fertilization, a one-time defoliation of source leaves did not shape seedling growth, development, or carbon allocation. This could be the result of compensatory growth or of the fact that the defoliation treatment was not strong enough to induce detectable effects until the end of the growing season.
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48
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Hoag HM, Martel J, Gauthier C, Tenenhouse HS. Effects of Npt2 gene ablation and low-phosphate diet on renal Na(+)/phosphate cotransport and cotransporter gene expression. J Clin Invest 1999; 104:679-86. [PMID: 10491403 PMCID: PMC408436 DOI: 10.1172/jci7103] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.0] [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: 01/20/2023] Open
Abstract
The renal Na(+)/phosphate (Pi) cotransporter Npt2 is expressed in the brush border membrane (BBM) of proximal tubular cells. We examined the effect of Npt2 gene knockout on age-dependent BBM Na(+)/Pi cotransport, expression of Na(+)/Pi cotransporter genes Npt1, Glvr-1, and Ram-1, and the adaptive response to chronic Pi deprivation. Na(+)/Pi cotransport declines with age in wild-type mice (Npt2(+/+)), but not in mice homozygous for the disrupted Npt2 allele (Npt2(-/-)). At all ages, Na(+)/Pi cotransport in Npt2(-/-) mice is approximately 15% of that in Npt2(+/+) littermates. Only Npt1 mRNA abundance increases with age in Npt2(+/+) mice, whereas Npt1, Glvr-1, and Ram-1 mRNAs show an age-dependent increase in Npt2(-/-) mice. Pi deprivation significantly increases Na(+)/Pi cotransport, Npt2 protein, and mRNA in Npt2(+/+) mice. In contrast, Pi-deprived Npt2(-/-) mice fail to show the adaptive increase in transport despite exhibiting a fall in serum Pi. We conclude that (a) Npt2 is a major determinant of BBM Na(+)/Pi cotransport; (b) the age-dependent increase in Npt1, Glvr-1, and Ram-1 mRNAs in Npt2(-/-) mice is insufficient to compensate for loss of Npt2; and (c) Npt2 is essential for the adaptive BBM Na(+)/Pi cotransport response to Pi deprivation.
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Affiliation(s)
- H M Hoag
- Department of Biology, Department of Pediatrics, McGill University-Montreal Children's Hospital Research Institute, Montreal, Quebec H3H 1P3, Canada
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49
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Martel J, Chopin P, Colpaert F, Marien M. Neuroprotective effects of the alpha2-adrenoceptor antagonists, (+)-efaroxan and (+/-)-idazoxan, against quinolinic acid-induced lesions of the rat striatum. Exp Neurol 1998; 154:595-601. [PMID: 9878194 DOI: 10.1006/exnr.1998.6942] [Citation(s) in RCA: 36] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A deficient control of neuronal repair mechanisms by noradrenergic projections originating from the locus coeruleus may be a critical factor in the progression of neurodegenerative diseases. Blockade of presynaptic inhibitory alpha2-adrenergic autoreceptors can disinhibit this system, facilitating noradrenaline release. In order to test the neuroprotective potential of this approach in a model involving excitotoxicity, the effects of treatments with the alpha2-adreneceptor antagonists, (+)-efaroxan (0.63 mg/kg i.p., thrice daily for 7 days) or (+/-)-idazoxan (2.5 mg/kg i.p., thrice daily for 7 days), were evaluated in rats which received a quinolinic acid-induced lesion of the left striatum. Both drug treatments resulted in a reduced ipsiversive circling response to apomorphine and a reduced choline acetyltransferase deficit in the lesioned striatum. The mechanisms underlying this effect are not known for certain, but may include noradrenergic receptor modulation of glial cell function, growth factor synthesis and release, activity of glutamatergic corticostriatal afferents, and/or events initiated by NMDA receptor activation. These results suggest a therapeutic potential of alpha2-adrenoceptor antagonists in neurodegenerative disorders where excitotoxicity has been implicated.
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Affiliation(s)
- J Martel
- Centre de Recherche Pierre Fabre, 17 Avenue Jean Moulin, Castres Cédex, 81106, France
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50
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Santen RJ, Martel J, Hoagland M, Naftolin F, Roa L, Harada N, Hafer L, Zaino R, Pauley R, Santner S. Demonstration of aromatase activity and its regulation in breast tumor and benign breast fibroblasts. Breast Cancer Res Treat 1998; 49 Suppl 1:S93-9; discussion S109-19. [PMID: 9797023 DOI: 10.1023/a:1006081729828] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [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: 11/12/2022]
Abstract
Breast tumors from post-menopausal women contain higher amounts of estradiol than would be predicted from levels circulating in plasma. This observation raised the hypothesis that tumors may synthesize estradiol in situ and increase their tissue estradiol levels via this mechanism. The key enzyme involved in tissue estrogen synthesis, aromatase, is present in breast tumors but, according to some investigators, not in sufficient concentration to be biologically meaningful. We postulated that foci of cells in breast tumors might contain high amounts of aromatase and this locally produced estrogen might act in a paracrine or autocrine fashion. To test this hypothesis, we utilized immunohistochemistry to localize the aromatase enzyme, an histological scoring system to quantitate it, and culture of isolated breast cells to demonstrate its potential regulation. In 26 archival breast tumors, 16 (62%) contained aromatase by radiometric assay. With the immunohistochemical method, we detected areas with staining in the stroma as well as tumor epithelial cells. Staining ranged from the intensity approaching that seen in placenta to levels just distinguishable from background. We adopted an histological scoring system (H-score) from that used to quantitate progesterone receptor levels in tissue and used it to quantitate aromatase activity. A higher histologic score was found in stromal spindle cells (13) than in tumor epithelial cells (4.8). The biochemical aromatase results correlated with the H-score of stromal but not epithelial cells. To further study stromal cells from tumors, we isolated stromal cells from breast tumors and the benign areas of breast distal to the tumor and grew them in culture. Addition of dexamethasone, phorbol esters, and cyclic AMP analogues stimulated aromatase enzyme and messenger RNA levels substantially. Use of aromatase enzyme inhibitors such as letrozole blocked estrogen production but did not alter aromatase message levels. Epithelial cells, whether nonmalignant or cancer derived, exhibited no regulation by dexamethasone, phorbol esters, or cAMP analogues. These data, taken together, suggest that stromal cells may be more important than epithelial cancer cells for estrogen production in breast tumors. The ability to stimulate aromatase activity substantially with various enhancers of aromatase provides further credence for an important biologic role of estrogen production in tumor tissue.
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Affiliation(s)
- R J Santen
- Department of Internal Medicine, University of Virginia School of Medicine, Charlottesville, USA
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