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Lopez AG, Lefebvre H. Iatrogenic pseudopheochromocytoma. Annales d'Endocrinologie 2023; 84:398. [PMID: 37059657 DOI: 10.1016/j.ando.2023.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Lopez AG, Duparc C, Renouf S, Machevin E, Guillou VL, Sabourin JC, Defortescu G, Buffet A, Gimenez-Roqueplo AP, Dubessy C, Lefebvre H, Louiset E. RF33 | PSUN04 Luteinizing Hormone-Chorionic Gonadotrophin Receptor in Pheochromocytomas. J Endocr Soc 2022. [DOI: 10.1210/jendso/bvac150.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Abstract
Background
Pheochromocytomas and paragangliomas (PPGL) are catecholamine-producing neuroendocrine tumors that arise from the adrenal medulla or ganglia and display the highest heritability rate among all human tumours. Genomic analyses allowed identification of molecular subgroups of PPGL which are organized into 2 main clusters. Cluster 1 contains SDHx- and VHL-mutated tumors which do not produce epinephrine while cluster 2 includes the epinephrine-secreting PPGL related to RET, NF1, TMEM127 and MAX mutations. PPGL must be early diagnosed and treated to prevent adrenergic crises which can be life-threatening. Detection of PPGL is particularly important during pregnancy since PPGL are associated with a high risk of either maternal or fetal complications in this context. Reciprocally, pregnancy can favor adrenergic crises in patients with previously undiagnosed or silent pheochromocytoma (PCC). These dangerous events can be triggered by tumor compression resulting from fetus growth, or labor and delivery. However, it is known that surges in plasma catecholamines may also occur during early gestation suggesting that pregnancy may also activate the secretory activity of PPGL through the involvement of non-mechanical factors, such as gestational hormones.
Methods
In the present study, we report a case of silent PCC revealed in a pregnant woman by life-threatening adrenergic myocarditis occurring at 31 weeks of gestation. Analysis of PPGL susceptibility genes showed the presence of a heterozygous germline RET variant of uncertain significance. The fact that the first symptoms of catecholamine excess had appeared during the first trimester of pregnancy led us to conduct in vitro studies to investigate the effects of estradiol and the pregnancy hormone chorionic gonadotropin (hCG) on epinephrine secretion by cultured cells derived from the resected patient's tumor. Expression of luteinizing hormone/chorionic gonadotropin receptor (LHCGR) was searched for in the tumor and an additional series of 12 PCC by RT-qPCR and immunohistochemistry. LHCGR expression was also analyzed in silico in the PPGL cohorts of the COMETE and The Cancer Genome Atlas (TCGA) databases.
Results
hCG stimulated epinephrine secretion by primary cultured PCC cells. The tumor expressed the LHCG receptor, which was colocalized with catecholamine-producing enzymes. A similar expression pattern of the LHCG receptor was also observed in 5 out of a series of 12 PCCs. Moreover, in silico studies revealed that PPGL display the highest expression levels of LHCGR mRNA among the 32 solid tumor types of TCGA cohort. Interestingly, expression of LHCGR was higher in cluster 2 than in cluster 1 PPGL.
Conclusion
We show that PCC can express functional LHCG receptor. Consequently, pregnancy may activate catecholamine production by previously silent pheochromocytoma as early as the first trimester of gestation especially in women with gene mutations that predispose to cluster 2 epinephrine-secreting PCC.
Presentation: Sunday, June 12, 2022 12:30 p.m. - 2:30 p.m., Monday, June 13, 2022 1:18 p.m. - 1:23 p.m.
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Garber S, Rainey WE, Rege J, van Rooyen D, Lopez AG. OR13-5 Bone Morphogenetic Protein-4 (BMP4) Inhibits Adrenal Cell Cortisol Synthesis by Blocking CYP17A1 and CYP11B1 Expression. J Endocr Soc 2022. [PMCID: PMC9629239 DOI: 10.1210/jendso/bvac150.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background Cytochrome P450c17 (17α-hydroxylase, encoded by CYP17A1) and cytochrome P450c11 (11β-hydroxylase, encoded by CYP11B1) are essential for production of adrenal cortisol. The expression of CYP17A1 and CYP11B1 in adrenocortical cells is stimulated by adrenocorticotropic hormone (ACTH) through the cAMP and protein kinase A signal transduction pathway. Several growth factors can act as autocrine/paracrine regulators for modulating the steroidogenesis in the adrenal cortex. Among these factors, bone morphogenetic protein-4 (BMP4), a member of the superfamily of transforming growth factor-beta (TGFβ) has been previously reported to have an inhibitory effect on adrenal cell CYP17A1 expression and dehydroepiandrosterone (DHEA) production [1]. The role of BMP4 within the adrenal and its mechanisms regulating steroidogenesis are still unclear. In the present study, we examined human adrenal expression of BMP4 and its chronic effects on the H295R adrenal cell line. Objective To define the autocrine/paracrine role of BMP4 in adrenocortical zonation and adrenal steroidogenesis. Methods BMP4 expression in normal human adrenal glands was studied using microarray analysis with laser-captured adrenal capsule and cortical zones. Adrenal BMP4 protein expression was examined following immunohistochemistry (IHC) with a rabbit polyclonal antibody against human BMP4. In vitro studies were performed using H295R and human adrenal cells treated with or without ACTH (10nM), forskolin (10 µM) and BMP4 (50 ng/mL). The experimental medium was collected every 24 h and analyzed for cortisol. Experiments were terminated at 96 h followed by isolation of RNA and qPCR analysis for PPIA (normalization transcript), cytochrome P450 cholesterol side-chain cleavage (CYP11A1), CYP17A1 and CYP11B1. Results Microarray analysis of adrenal zone RNA demonstrated a BMP4 expression gradient with zona glomerulosa (ZG) expressing 3 and 11-fold higher levels than the zona fasciculata (ZF) and zona reticularis (ZR), respectively. IHC confirmed that BMP4 expression was highest in the ZG and the outer ZF. Administration of BMP4 to cultures of H295R cells caused a significant decrease in basal and forskolin-stimulated cortisol production at 48 h. By 96 h, BMP4 inhibited forskolin-stimulated cortisol by 60%. Cortisol inhibition occurred in conjunction with an inhibition in forskolin-stimulated CYP17A1 (↓75%) and CYP11B1 (↓65%). However, CYP11A1 expression was unaffected. In primary cultures of human adrenal cells BMP4 inhibited the ability of ACTH to increase cortisol production (↓75%), as well as CYP11B1(↓65%) and CYP17A1 (↓57%) expression. Conclusion Our findings indicate that the human adrenal has outer cortex localized expression of BMP4 that could play a paracrine/autocrine role in zone-specific production of aldosterone vs. cortisol through BMP4 selective inhibition of CYP17A1 and CYP11B1. Bibliography: 1. Rege J, Nishimoto HK, Nishimoto K, Rodgers RJ, Auchus RJ, Rainey WE. Bone Morphogenetic Protein-4 (BMP4): A Paracrine Regulator of Human Adrenal C19 Steroid Synthesis. Endocrinology 2015; 156: 2530–2540. Presentation: Sunday, June 12, 2022 12:00 p.m. - 12:15 p.m.
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Amar L, Cornu EC, Defortescu G, Duparc C, Fernandes-Rosa FL, Lefebvre H, Louiset E, Manceau G, Meatchi T, Renouf S, Sabourin JC, Zennaro MC, Lopez AG. OR20-4 Expression of the Neuropeptide Substance P and the NK1 Receptor in Aldosterone-Producing Adenomas. J Endocr Soc 2022. [DOI: 10.1210/jendso/bvac150.516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Abstract
Background
Aldosterone-producing adenoma (APA) is a major cause of primary aldosteronism (PA) which is the most frequent form of secondary hypertension (1-2). The pathophysiology of PA is quite complex and still incompletely understood. Substance P (SP) encoded by the TAC1 gene belongs to a family of bioactive peptides named tachykinins. A recently published study indicated that SP, released by subcapsular nerve fibres, stimulates aldosterone production through activation of the neurokinin type 1 receptor (NK1R) in the human adrenal gland (3). The aim of our work was to investigate the presence of SP fibres and the NK1 receptor in a large series of APA in order to assess the potential role of this peptide in the pathophysiology of PA.
Methods
APA tissues were studied by molecular and histological approaches. Expression of SP and NK1 receptor was searched for in a series of 51 APA by RT-Q-PCR and immunohistochemistry.
Results
Quantitative RT-PCR data indicated that adenomas strongly express TAC1 mRNA. Immunohistochemistry showed the presence of SP-positive nerve fibres in APAs tissues. SP was also detected in a subpopulation of adenomatous cells. Adenomas strongly express mRNA encoding the NK1 receptor. The distribution of the NK1 receptor within APAs is similar to that of aldosterone synthase (CYP11B2), suggesting that SP may regulate aldosterone secretion by APAs.
Conclusion
These results suggest that SP and its NK1 receptor may be involved in the pathophysiology of aldosterone hypersecretion by APAs. References: 1. Monticone S, Burrello J, Tizzani D, Bertello C, Viola A, Buffolo F, et al. Prevalence and Clinical Manifestations of Primary Aldosteronism Encountered in Primary Care Practice. J Am Coll Cardiol. 2017;69(14): 1811-20. 2. Buffolo F, Monticone S, Tetti M, Mulatero P. Primary aldosteronism in the primary care setting. Curr Opin Endocrinol Diabetes Obes. 2018;25(3): 155-9. 3. Wils J, Duparc C, Cailleux A-F, Lopez A-G, Guiheneuf C, Boutelet I, et al. The neuropeptide substance P regulates aldosterone secretion in human adrenals. Nat Commun. 2020;11(1): 2673.
Presentation: Monday, June 13, 2022 11:45 a.m. - 12:00 p.m.
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Lopez AG, Duparc C, Renouf S, Machevin E, Le Guillou V, Sabourin JC, Defortescu G, Buffet A, Gimenez-Roqueplo AP, Dubessy C, Louiset E, Lefebvre H. Expression of LHCGR (Luteinizing Hormone/Chorionic Gonadotrophin Receptor) in Pheochromocytomas Unveils an Endocrine Mechanism Connecting Pregnancy and Epinephrine Overproduction. Hypertension 2022; 79:1006-1016. [PMID: 35189708 DOI: 10.1161/hypertensionaha.121.18864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The mechanisms by which pregnancy may unmask pheochromocytomas and paragangliomas are not totally understood. We hypothesized that gestational hormones may participate in the pathophysiology of catecholamine excess during pregnancy. We report a case of silent pheochromocytoma revealed in a pregnant woman by life-threatening adrenergic myocarditis. METHODS In vitro studies were conducted to investigate the effect of estradiol and the pregnancy hormone hCG (human chorionic gonadotropin) on epinephrine secretion by cultured cells derived from the patient's tumor. Expression of LHCG (luteinizing hormone/chorionic gonadotropin) receptor was searched for in the patient's tumor, and a series of 12 additional pheochromocytoma by RT-Q-PCR and immunohistochemistry. LHCGR expression was also analyzed in silico in the pheochromocytomas and paragangliomas cohorts of the Cortico et Médullosurrénale: les Tumeurs Endocrines and The Cancer Genome Atlas databases. RESULTS hCG stimulated epinephrine secretion by cultured cells derived from the patient's pheochromocytoma. The patient's tumor expressed the LHCG receptor, which was colocalized with catecholamine-producing enzymes. A similar expression pattern of the LHCG receptor was also observed in 5 out of our series of pheochromocytoma. Moreover, in silico studies revealed that pheochromocytomas and paragangliomas display the highest expression levels of LHCG receptor mRNA among the 32 solid tumor types of The Cancer Genome Atlas cohort. CONCLUSIONS Pregnancy may thus favor surges in plasma catecholamine and hypertensive crises through hCG-induced stimulation of epinephrine production by pheochromocytomas.
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Affiliation(s)
- Antoine-Guy Lopez
- Normandie University, UNIROUEN, INSERM U1239, NorDIC, Rouen, France (A.-G.L., C. Duparc, S.R., C. Dubessy, E.L., H.L.).,Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen University Hospital, France. (A.-G.L., H.L.)
| | - Céline Duparc
- Normandie University, UNIROUEN, INSERM U1239, NorDIC, Rouen, France (A.-G.L., C. Duparc, S.R., C. Dubessy, E.L., H.L.)
| | - Sylvie Renouf
- Normandie University, UNIROUEN, INSERM U1239, NorDIC, Rouen, France (A.-G.L., C. Duparc, S.R., C. Dubessy, E.L., H.L.)
| | - Elise Machevin
- Department of Gynaecology-Obstetrics, Evreux Hospital Centre, France (E.M.)
| | - Vincent Le Guillou
- Department of Thoracic and Cardiovascular Surgery, Rouen University Hospital, France. (V.L.G.)
| | - Jean-Christophe Sabourin
- Department of Pathology and INSERM 1245, Rouen University Hospital, France. (J.-C.S,).,Tumor BioBank-Centre for Biological Resources, Rouen University Hospital, France. (J.-C.S., H.L.)
| | - Guillaume Defortescu
- Normandie University, UNIROUEN, INSERM U1239, NorDIC, Rouen, France (A.-G.L., C. Duparc, S.R., C. Dubessy, E.L., H.L.).,Department of Urology, Rouen University Hospital, France. (G.D.)
| | - Alexandre Buffet
- Université de Paris, PARCC, INSERM, Paris, France (A.B., A.-P.G.-R.).,Service de Génétique, Assistance Publique-Hôpitaux de Paris, Hôpital européen Georges Pompidou, Paris, France (A.B., A.-P.G.-R.)
| | - Anne-Paule Gimenez-Roqueplo
- Université de Paris, PARCC, INSERM, Paris, France (A.B., A.-P.G.-R.).,Service de Génétique, Assistance Publique-Hôpitaux de Paris, Hôpital européen Georges Pompidou, Paris, France (A.B., A.-P.G.-R.)
| | - Christophe Dubessy
- Normandie University, UNIROUEN, INSERM, PRIMACEN, Rouen, France (C. Dubessy)
| | - Estelle Louiset
- Normandie University, UNIROUEN, INSERM U1239, NorDIC, Rouen, France (A.-G.L., C. Duparc, S.R., C. Dubessy, E.L., H.L.)
| | - Hervé Lefebvre
- Normandie University, UNIROUEN, INSERM U1239, NorDIC, Rouen, France (A.-G.L., C. Duparc, S.R., C. Dubessy, E.L., H.L.).,Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen University Hospital, France. (A.-G.L., H.L.).,Tumor BioBank-Centre for Biological Resources, Rouen University Hospital, France. (J.-C.S., H.L.)
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Affiliation(s)
- Antoine-Guy Lopez
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Unité Hypertension Artérielle, Paris, France (A.-G.L., J.-B.d.F., L.A.).,Normandie Univ, UNIROUEN, INSERM U1239, Rouen University Hospital, Department of Endocrinology, Diabetology and Metabolic Diseases, Rouen, France (A.-G.L.)
| | - Anna F Dominiczak
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, United Kingdom. (A.F.D.)
| | - Rhian Touyz
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, United Kingdom. (R.T.)
| | - Markus Schlaich
- Dobney Hypertension Centre, School of Medicine, Royal Perth Hospital Unit, Royal Perth Hospital Medical Research Foundation, The University of Western Australia, Australia (M.S.)
| | - Jean-Baptiste de Freminville
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Unité Hypertension Artérielle, Paris, France (A.-G.L., J.-B.d.F., L.A.).,Université de Paris, PARCC, INSERM, France (J.-B.d.F., L.A.)
| | - Laurence Amar
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Unité Hypertension Artérielle, Paris, France (A.-G.L., J.-B.d.F., L.A.).,Université de Paris, PARCC, INSERM, France (J.-B.d.F., L.A.)
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Djari C, Sahut-Barnola I, Septier A, Plotton I, Montanier N, Dufour D, Levasseur A, Wilmouth J, Pointud JC, Faucz FR, Kamilaris C, Lopez AG, Guillou F, Swain A, Vainio SJ, Tauveron I, Val P, Lefebvre H, Stratakis CA, Martinez A, Lefrançois-Martinez AM. Protein kinase A drives paracrine crisis and WNT4-dependent testis tumor in Carney complex. J Clin Invest 2021; 131:146910. [PMID: 34850745 DOI: 10.1172/jci146910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 10/01/2021] [Indexed: 12/16/2022] Open
Abstract
Large-cell calcifying Sertoli cell tumors (LCCSCTs) are among the most frequent lesions occurring in male Carney complex (CNC) patients. Although they constitute a key diagnostic criterion for this rare multiple neoplasia syndrome resulting from inactivating mutations of the tumor suppressor PRKAR1A, leading to unrepressed PKA activity, LCCSCT pathogenesis and origin remain elusive. Mouse models targeting Prkar1a inactivation in all somatic populations or separately in each cell type were generated to decipher the molecular and paracrine networks involved in the induction of CNC testis lesions. We demonstrate that the Prkar1a mutation was required in both stromal and Sertoli cells for the occurrence of LCCSCTs. Integrative analyses comparing transcriptomic, immunohistological data and phenotype of mutant mouse combinations led to the understanding of human LCCSCT pathogenesis and demonstrated PKA-induced paracrine molecular circuits in which the aberrant WNT4 signal production is a limiting step in shaping intratubular lesions and tumor expansion both in a mouse model and in human CNC testes.
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Affiliation(s)
- Cyril Djari
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France
| | | | - Amandine Septier
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France
| | - Ingrid Plotton
- UM Pathologies Endocriniennes Rénales Musculaires et Mucoviscidose, Hospices Civils de Lyon, Bron, France
| | - Nathanaëlle Montanier
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France.,Université Clermont-Auvergne, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Damien Dufour
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France
| | - Adrien Levasseur
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France
| | - James Wilmouth
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France
| | | | - Fabio R Faucz
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), NIH, Bethesda, Maryland, USA
| | - Crystal Kamilaris
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), NIH, Bethesda, Maryland, USA
| | - Antoine-Guy Lopez
- Normandie University, UNIROUEN, INSERM U1239, Rouen University Hospital, Department of Endocrinology, Diabetology and Metabolic Diseases and CIC-CRB 140h4, Rouen, France
| | | | - Amanda Swain
- Division of Cancer Biology, Institute of Cancer Research, London, United Kingdom
| | - Seppo J Vainio
- Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Igor Tauveron
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France.,Université Clermont-Auvergne, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Pierre Val
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France
| | - Hervé Lefebvre
- Normandie University, UNIROUEN, INSERM U1239, Rouen University Hospital, Department of Endocrinology, Diabetology and Metabolic Diseases and CIC-CRB 140h4, Rouen, France
| | - Constantine A Stratakis
- Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), NIH, Bethesda, Maryland, USA
| | - Antoine Martinez
- iGReD, Université Clermont-Auvergne, CNRS6293, INSERM U1103, Clermont-Ferrand, France
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Lopez AG, Duparc C, Wils J, Naccache A, Castanet M, Lefebvre H, Louiset E. Steroidogenic cell microenvironment and adrenal function in physiological and pathophysiological conditions. Mol Cell Endocrinol 2021; 535:111377. [PMID: 34216641 DOI: 10.1016/j.mce.2021.111377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 12/19/2022]
Abstract
The human adrenal cortex is a complex organ which is composed of various cell types including not only steroidogenic cells but also mesenchymal cells, immunocompetent cells and neurons. Intermingling of these diverse cell populations favors cell-to-cell communication processes involving local release of numerous bioactive signals such as biogenic amines, cytokines and neuropeptides. The resulting paracrine interactions play an important role in the regulation of adrenocortical cell functions both in physiological and pathophysiological conditions. Especially, recent evidence indicates that adrenocortical cell microenvironment is involved in the pathogenesis of adrenal disorders associated with corticosteroid excess. The paracrine factors involved in these intraadrenal regulatory mechanisms may thus represent valuable targets for future pharmacological treatments of adrenal diseases.
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Affiliation(s)
- Antoine-Guy Lopez
- Normandie Univ, UNIROUEN, INSERM, U1239, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Rouen, France; Rouen University Hospital, Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen, France
| | - Céline Duparc
- Normandie Univ, UNIROUEN, INSERM, U1239, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Rouen, France
| | - Julien Wils
- Normandie Univ, UNIROUEN, INSERM, U1239, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Rouen, France; Rouen University Hospital, Department of Pharmacology, Rouen, France
| | - Alexandre Naccache
- Normandie Univ, UNIROUEN, INSERM, U1239, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Rouen, France; Rouen University Hospital, Department of Pediatrics, Rouen, France
| | - Mireille Castanet
- Normandie Univ, UNIROUEN, INSERM, U1239, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Rouen, France; Rouen University Hospital, Department of Pediatrics, Rouen, France
| | - Hervé Lefebvre
- Normandie Univ, UNIROUEN, INSERM, U1239, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Rouen, France; Rouen University Hospital, Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen, France.
| | - Estelle Louiset
- Normandie Univ, UNIROUEN, INSERM, U1239, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Rouen, France
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Deflorenne E, Peuchmaur M, Vezzosi D, Ajzenberg C, Brunaud L, Chevalier N, Christin-Maitre S, Decoudier B, Driessens N, Drui DD, Gilly O, Goudet P, Illouz F, Jublanc C, Lefebvre H, Lopez AG, Lussey C, Morini A, Raffin-Sanson ML, Raingeard I, Renoult-Pierre P, Storey C, Tabarin A, Vantyghem MC, Vidal-Petiot E, Baudin E, Bertherat J, Amar L. Adrenal ganglioneuromas: a retrospective multicentric study of 104 cases from the COMETE network. Eur J Endocrinol 2021; 185:463-474. [PMID: 34291731 DOI: 10.1530/eje-20-1049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 07/06/2021] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Adrenal ganglioneuromas are rare, differentiated, neuroblastic tumors that originate from the peripheral sympathetic nervous system. Because of their rarity, information is limited, derived from small cases series. Our objective was to characterize this tumor and provide help for its management. METHODS A retrospective multicenter analysis of adrenal ganglioneuromas from 20 French centers belonging to the COMETE network and one Belgian center. RESULTS Among the 104 cases identified, 59.6% were women (n = 62/104), median age at diagnosis was 29 years, with 24 pediatric cases. 60.6% (n = 63/104) were incidentalomas. Ganglioneuromas were non-secreting tumors in 90.8% of cases (n = 89/98), whereas the preoperative hormonal evaluation was indeterminate for 9.2% of patients (n = 9/98). CT imaging, performed on 96 patients, revealed large tumors (median diameter of 50 mm) with a non-contrast density > 10 Hounsfield units in 98.1% (n = 52/53) and calcifications in 64.6% of cases (n = 31/48). Increased uptake on 123I-MIBG scintigraphy and 18F-FDG-PET/CT was observed in 26.7% (n = 8/30) and 42.2% (n = 19/45) of the tumors, respectively. All 104 patients underwent surgery. No recurrence was observed among the 42 patients who had an imaging follow-up (mean 29.6 months, median 18 months (4-156)). CONCLUSION Adrenal ganglioneuromas are large tumors, mostly nonfunctioning, without benign imaging features. Although the duration of follow-up was limited in our series, no recurrence was identified. A review of the literature confirms the absence of postoperative recurrence. Based on all available data, in the absence of special circumstances (genetic form, uncertain histological diagnosis), long-term follow-up is not necessary after complete surgery for patients with an adrenal ganglioneuroma.
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Affiliation(s)
- Elisa Deflorenne
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Centre de Référence des Maladies Rares de la Surrénale, Unité Fonctionnelle d 'Hypertension Artérielle, Université de Paris, Paris, France
- Sorbonne Université, Médecine Paris, France, undefined
- UMR970, Paris-Cardiovascular research Center, INSERM, F-75015, Paris, France
| | - Michel Peuchmaur
- Service de Pathologie, HU Robert Debré, APHP, Paris, France
- Université de Paris, Paris, France
| | | | - Christiane Ajzenberg
- Assistance Publique-Hôpitaux de Paris, Hôpital Henri Mondor, Service de Médecine Interne et Endocrinologie, Créteil, France
| | - Laurent Brunaud
- Département de Chirurgie Viscérale, Métabolique et Cancérologique Unité Médico-chirurgicale de chirurgie Métabolique, Endocrinienne et Thyroïdienne (UMET), Université de Lorraine, CHU de Nancy, Hôpital Brabois Adultes, Nancy, France
| | - Nicolas Chevalier
- Université Côte d'Azur, Service d'Endocrinologie, Diabétologie et Reproduction, CHU de Nice, Hôpital de l'Archet 2, Nice, France
| | - Sophie Christin-Maitre
- Assistance Publique-Hôpitaux de Paris, Hôpital Saint-Antoine, Service d'Endocrinologie et Maladies de la Reproduction, Paris, France
| | - Bénédicte Decoudier
- Centre Hospitalier Universitaire de Reims, Service d'Endocrinologie-Diabète-Nutrition, Reims, France
| | - Natacha Driessens
- Département d'Endocrinologie, CUB-Hôpital Erasme, Bruxelles, Belgique
| | - Delphine D Drui
- Centre Hospitalier Universitaire de Nantes, Hôpital Nord Laënnec, Service d'Endocrinologie, Diabétologie et Maladies Métaboliques, L'institut du Thorax, Nantes, France
| | - Olivier Gilly
- CHU de Nîmes, Service des Maladies Métaboliques et Endocriniennes, Nîmes, France
| | - Pierre Goudet
- CHU de Dijon, Chirurgie Endocrinienne et Métabolique, Dijon, France
| | - Frédéric Illouz
- Centre de Référence des Maladies Rares de la Thyroïde et des Récepteurs Hormonaux, Département d'Endocrinologie Diabétologie Nutrition, Angers, France
| | - Christel Jublanc
- Assistance Publique-Hôpitaux de Paris, Hôpital Pitié-Salpêtrière, Service d'Endocrinologie-Métabolisme, Institut E3M, Paris, France
| | - Hervé Lefebvre
- Université de Rouen Normandie, UNIROUEN, INSERM U1239, CHU de Rouen, Service d'Endocrinologie, Diabète et Maladies Métaboliques et CIC-CRB 1404, Rouen, France
| | - Antoine-Guy Lopez
- Université de Rouen Normandie, UNIROUEN, INSERM U1239, CHU de Rouen, Service d'Endocrinologie, Diabète et Maladies Métaboliques et CIC-CRB 1404, Rouen, France
| | - Charlotte Lussey
- Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Nucléaire, Paris, France
| | - Aurelien Morini
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges-Pompidou, Laboratoire d'Anatomo-Pathologie, Paris, France
| | - Marie-Laure Raffin-Sanson
- Assistance Publique-Hôpitaux de Paris, CHU Ambroise-Paré, Service d'Endocrinologie et Nutrition, Boulogne-Billancourt, France
| | - Isabelle Raingeard
- CHRU de Montpellier, Service d'Endocrinologie, Diabète, Maladies Métaboliques, Montpellier, France
| | - Peggy Renoult-Pierre
- Centre Hospitalier Universitaire de Tours, Département d'Endocrinologie, Tours, France
| | - Caroline Storey
- Assistance Publique-Hôpitaux de Paris, Hôpital Universitaire Robert Debré, Service d'Endocrinologie Diabétologie Pédiatrique, Paris, France
| | - Antoine Tabarin
- CHU de Bordeaux, Service d'Endocrinologie, Diabétologie et Maladies Métaboliques, Bordeaux, France
| | - Marie Christine Vantyghem
- Centre Hospitalier Régional Universitaire de Lille, Service d'Endocrinologie et Maladies Métaboliques, Lille, France
| | - Emmanuelle Vidal-Petiot
- Assistance Publique-Hôpitaux de Paris, Hôpital Bichat, Service de Physiologie, Paris, France
| | - Eric Baudin
- Institut Gustave Roussy, Service de Médecine Nucléaire et de Cancérologie Endocrinienne, Villejuif, France
| | - Jerome Bertherat
- Université Paris Descartes, Hôpital Cochin, Centre de Référence des Maladies Rares de la Surrénale, Service d'Endocrinologie, Paris, France
| | - Laurence Amar
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Centre de Référence des Maladies Rares de la Surrénale, Unité Fonctionnelle d 'Hypertension Artérielle, Université de Paris, Paris, France
- UMR970, Paris-Cardiovascular research Center, INSERM, F-75015, Paris, France
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Lopez AG, Kerlan V, Desailloud R. Non-classical effects of vitamin D: Non-bone effects of vitamin D. Ann Endocrinol (Paris) 2020; 82:43-51. [PMID: 33279474 DOI: 10.1016/j.ando.2020.12.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 12/01/2020] [Indexed: 12/14/2022]
Abstract
Our understanding of vitamin D has improved considerably in recent years. The role of vitamin D in preventing osteoporotic fractures is now well-established. However, an important controversy has emerged in the last decade concerning the effects of the active form of vitamin D (1,25-dihydroxy-vitamin D) on tissues other than bone (non-classical effects). The demonstration that the vitamin D receptor (VDR) is ubiquitously, expressed combined with increasing observational data supporting a relationship between the level of 25-hydroxy-vitamin D in the serum and chronic metabolic disorders, cardiovascular disease and neoplasms, have led to its redefinition as a steroid hormone and the proposal of its use in preventing and/or treating those diseases. This article is an update on the different non-bone or non-classical effects of "vitamin-hormone D", and its potential preventive or therapeutic role in certain diseases, however, this review is not exhaustive. The different modalities of substitution or supplementation proposed in France by the Groupe de Recherche et d'Information sur les Ostéoporoses (GRIO) are also summarised.
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Affiliation(s)
- Antoine-Guy Lopez
- Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen University Hospital, Rouen, France.
| | - Véronique Kerlan
- Department of Endocrinology, Diabetes and Metabolic Diseases, Hôpital de la Cavale Blanche, Brest, France
| | - Rachel Desailloud
- Department of Endocrinology, Diabetes and Nutrition, and PériTox, UMR-I 01 INERIS, University Picardie Jules Verne (UPJV), Amiens, France
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Abstract
Mast cells are immune cells present in adrenals from various species. Proliferation and activation of adrenal mast cells seem to be influenced by environment, since they increase during summer and in response to sodium restriction in frogs and mouse, respectively. Although the physiological factors regulating adrenal mast cell activity have not been identified, they might involve neurotransmitters and the renin-angiotensin system. Some data indicate that adrenal mast cells stimulate proliferation of steroidogenic cells in the zona glomerulosa and activate the mineralocorticoid production. In human, mast cell degranulation stimulates aldosterone synthesis through the release of serotonin (5-HT) and activation of 5-HT4 receptors. Increase in mast cell population and upregulation of the 5-HT signaling pathway occur in aldosterone-producing adenomas. In particular, aldosterone-producing adenoma cells overexpress 5-HT4 receptors and are hyper-responsive to 5-HT4 receptor agonists. These data suggest that the intra-adrenal serotonergic regulatory system represents a potential target for development of both adrenal imaging methods to evaluate the lateralization of aldosterone production, and pharmacological treatments of primary aldosteronism.
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Affiliation(s)
- Antoine-Guy Lopez
- Normandie University, UNIROUEN, INSERM, DC2N, Rouen, France
- Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen University Hospital, Rouen, France
| | - Céline Duparc
- Normandie University, UNIROUEN, INSERM, DC2N, Rouen, France
| | - Alexandre Naccache
- Normandie University, UNIROUEN, INSERM, DC2N, Rouen, France
- Department of Pediatrics, Rouen University Hospital, Rouen, France
| | - Mireille Castanet
- Normandie University, UNIROUEN, INSERM, DC2N, Rouen, France
- Department of Pediatrics, Rouen University Hospital, Rouen, France
| | - Hervé Lefebvre
- Normandie University, UNIROUEN, INSERM, DC2N, Rouen, France
- Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen University Hospital, Rouen, France
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12
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Lopez AG, Fraissinet F, Lefebvre H, Brunel V, Ziegler F. Pharmacological and analytical interference in hormone assays for diagnosis of adrenal incidentaloma. Annales d'Endocrinologie 2019; 80:250-258. [DOI: 10.1016/j.ando.2018.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 09/27/2018] [Accepted: 11/19/2018] [Indexed: 12/19/2022]
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13
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Guillemot J, Guérin M, Cailleux AF, Lopez AG, Kuhn JM, Anouar Y, Yon L. Characterization of the EM66 Biomarker in the Pituitary and Plasma of Healthy Subjects With Different Gonadotroph Status and Patients With Gonadotroph Tumor. Front Endocrinol (Lausanne) 2019; 10:102. [PMID: 30853937 PMCID: PMC6395403 DOI: 10.3389/fendo.2019.00102] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 02/04/2019] [Indexed: 12/05/2022] Open
Abstract
Granins and their derived-peptides are useful markers of secretion from normal and tumoral neuroendocrine cells. The need to identify new diagnostic markers for neuroendocrine tumors, including pituitary tumors prompted us to determine plasma levels of the secretogranin II-derived peptide EM66 in healthy volunteers with different gonadotroph status and to evaluate its usefulness as a circulating marker for the diagnosis of gonadotroph tumor. Using a radioimmunoassay, we determined plasma EM66 concentrations in healthy men and women volunteers in different physiological conditions in relation with the gonadotroph function. Our results revealed that in men, in women with or without contraception, in pregnant or post-menopausal women, plasma EM66 concentrations are not significantly different, and did not show any correlation with gonadotropin levels. In addition, stimulation or inhibition tests of the gonadotroph axis had no effect on EM66 levels, whatever the group of healthy volunteers investigated while gonadotropin levels showed the expected variations. Immunohistochemical experiments and HPLC analysis showed the occurrence of EM66 in pituitary gonadotroph, lactotroph and corticotroph tumors but not in somatotroph tumor. In patients with gonadotroph or lactotroph tumor, plasma EM66 levels were 1.48 (0.82-4.38) ng/ml and 2.49 (1.19-3.54) ng/ml, respectively. While median value of EM66 was significantly lower in patients with gonadotroph tumor compared to healthy volunteers [2.59 (0.62-4.95) ng/ml], plasma EM66 concentrations were in the same range as normal values and did not show any correlation with gonadotropin levels. These results show that plasma EM66 levels are independent of the activity of the gonadotroph axis in healthy volunteers and, while EM66 levels are reduced in gonadotroph tumors, plasma EM66 does not provide a helpful marker for the diagnosis of these tumors.
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Affiliation(s)
- Johann Guillemot
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie Univ, UNIROUEN, INSERM, Rouen, France
| | - Marlène Guérin
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie Univ, UNIROUEN, INSERM, Rouen, France
| | - Anne-Françoise Cailleux
- Endocrinology, Diabetes and Metabolism Department, Normandie Univ, UNIROUEN, Rouen University Hospital, INSERM CIC-CRB, Rouen, France
| | - Antoine-Guy Lopez
- Department of Endocrinology, Diabetes and Metabolic Diseases, Normandie Univ, UNIROUEN, Rouen University Hospital, Rouen, France
| | - Jean-Marc Kuhn
- Endocrinology, Diabetes and Metabolism Department, Normandie Univ, UNIROUEN, Rouen University Hospital, INSERM CIC-CRB, Rouen, France
| | - Youssef Anouar
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie Univ, UNIROUEN, INSERM, Rouen, France
| | - Laurent Yon
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie Univ, UNIROUEN, INSERM, Rouen, France
- *Correspondence: Laurent Yon
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Lefebvre H, Duparc C, Naccache A, Lopez AG, Castanet M, Louiset E. Paracrine Regulation of Aldosterone Secretion in Physiological and Pathophysiological Conditions. Vitam Horm 2018; 109:303-339. [PMID: 30678861 DOI: 10.1016/bs.vh.2018.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Aldosterone secretion by the zona glomerulosa of the adrenal cortex is controlled by circulating factors including the renin angiotensin system (RAS) and potassium. Mineralocorticoid production is also regulated through an autocrine/paracrine mechanism by a wide variety of bioactive signals released in the vicinity of adrenocortical cells by chromaffin cells, nerve endings, cells of the immune system, endothelial cells and adipocytes. These regulatory factors include conventional neurotransmitters and neuropeptides. Their physiological role in the control of aldosterone secretion is not fully understood, but it is likely that they participate in the RAS-independent regulation of zona glomerulosa cells. Interestingly, recent observations indicate that autocrine/paracrine processes are involved in the pathophysiology of primary aldosteronism. The intraadrenal regulatory systems observed in aldosterone-producing adenomas (APA), although globally similar to those occurring in the normal adrenal gland, harbor alterations at different levels, which tend to strengthen the potency of paracrine signals to activate aldosterone secretion. Enhancement of paracrine stimulatory tone may participate to APA expansion and aldosterone hypersecretion together with somatic mutations of driver genes which activate the calcium signaling pathway and subsequently aldosterone synthase expression. Intraadrenal regulatory mechanisms represent thus promising pharmacological targets for the treatment of primary aldosteronism.
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Affiliation(s)
- Hervé Lefebvre
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie University, UNIROUEN, INSERM, Rouen, France; Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen University Hospital, Rouen, France.
| | - Céline Duparc
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie University, UNIROUEN, INSERM, Rouen, France
| | - Alexandre Naccache
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie University, UNIROUEN, INSERM, Rouen, France; Unit of Pediatric Endocrinology, Department of Pediatrics, Rouen University Hospital, Rouen, France
| | - Antoine-Guy Lopez
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie University, UNIROUEN, INSERM, Rouen, France; Department of Endocrinology, Diabetes and Metabolic Diseases, Rouen University Hospital, Rouen, France
| | - Mireille Castanet
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie University, UNIROUEN, INSERM, Rouen, France; Unit of Pediatric Endocrinology, Department of Pediatrics, Rouen University Hospital, Rouen, France
| | - Estelle Louiset
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Normandie University, UNIROUEN, INSERM, Rouen, France
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Abstract
OBJECTIVE To estimate the rate of treatment with anti-parkinson drugs (APD) among patients with depression. METHOD In a nationwide case register linkage study, all persons with a main diagnosis of depression during 5 years were identified. A control group of persons with diagnoses of osteoarthritis was included. The subsequent risk of getting treatment with APD was estimated for the two groups. Statistical analyses involved Poisson's regression and competing risk models. RESULTS A total of 14 991 persons were included. The rate of getting APD was 2.57 (95% CI: 1.46-4.52) times higher for persons with depression than for persons with osteoarthritis. Overall, the rate was highest for men. However, women with depression had a 3.89 (95% CI: 1.98-7.62) times higher rate of APD treatment as women with osteoarthritis while no significant difference was found among men. CONCLUSION Provided that prescription of APD reflects the presence of Parkinson's disease, results support a positive statistical association between depressive disorders and Parkinson's disease.
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Affiliation(s)
- M Brandt-Christensen
- Department of Psychiatry, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark.
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Søndergård L, Kvist K, Lopez AG, Andersen PK, Kessing LV. Temporal changes in suicide rates for persons treated and not treated with antidepressants in Denmark during 1995-1999. Acta Psychiatr Scand 2006; 114:168-76. [PMID: 16889587 DOI: 10.1111/j.1600-0447.2006.00796.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To compare the temporal changes in suicide rate among patients treated with antidepressants with the change in suicide rate among persons who have not been treated with antidepressants during 1995-1999. METHOD In a historic prospective national pharmacoepidemiological register linkage study by using four Danish registers we included 438,625 patients who had purchased antidepressants, and compared them with 1,199,057 population based control persons. The annual rate of suicide was estimated using Poisson regression analyses. RESULTS The suicide rate decreased for persons treated with antidepressants as well as for persons not treated with antidepressants. The proportion of persons, who committed suicide and who had not been treated with antidepressants decreased. The reduction in suicide rate was more pronounced among persons treated with SSRIs or older antidepressants than among persons not treated with antidepressants. CONCLUSION Several factors contribute to the decreasing suicide rate. The most pronounced decrease in suicide rate was found among persons treated with antidepressants.
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Affiliation(s)
- L Søndergård
- Department of Psychiatry, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark.
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Chemlal K, Huys G, Fonteyne PA, Vincent V, Lopez AG, Rigouts L, Swings J, Meyers WM, Portaels F. Evaluation of PCR-restriction profile analysis and IS2404 restriction fragment length polymorphism and amplified fragment length polymorphism fingerprinting for identification and typing of Mycobacterium ulcerans and M. marinum. J Clin Microbiol 2001; 39:3272-8. [PMID: 11526162 PMCID: PMC88330 DOI: 10.1128/jcm.39.9.3272-3278.2001] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [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: 12/11/2000] [Accepted: 05/29/2001] [Indexed: 11/20/2022] Open
Abstract
Mycobacterium ulcerans and M. marinum are emerging necrotizing mycobacterial pathogens that reside in common reservoirs of infection and exhibit striking pathophysiological similarities. Furthermore, the interspecific taxonomic relationship between the two species is not clear as a result of the very high phylogenetic relatedness (i.e., >99.8% 16S rRNA sequence similarity), in contrast to only 25 to 47% DNA relatedness. To help understand the genotypic affiliation between these two closely related species, we performed a comparative analysis including PCR restriction profile analysis (PRPA), IS2404 restriction fragment length polymorphism (RFLP), and amplified fragment length polymorphism (AFLP) on a set of M. ulcerans (n = 29) and M. marinum (n = 28) strains recovered from different geographic origins. PRPA was based on a triple restriction of the 3' end region of 16S rRNA, which differentiated M. ulcerans into three types; however, the technique could not distinguish M. marinum from M. ulcerans isolates originating from South America and Southeast Asia. RFLP based on IS2404 produced six M. ulcerans types related to six geographic regions and did not produce any band with M. marinum, confirming the previous findings of Chemlal et al. (K. Chemlal, K. DeRidder, P. A. Fonteyne, W. M. Meyers, J. Swings, and F. Portaels, Am. J. Trop. Med. Hyg. 64:270-273, 2001). AFLP analysis resulted in profiles which grouped M. ulcerans and M. marinum into two separate clusters. The numerical analysis also revealed subgroups among the M. marinum and M. ulcerans isolates. In conclusion, PRPA appears to provide a rapid method for differentiating the African M. ulcerans type from other geographical types but is unsuitable for interspecific differentiation of M. marinum and M. ulcerans. In comparison, whole- genome techniques such as IS 2404-RFLP and AFLP appear to be far more useful in discriminating between M. marinum and M. ulcerans, and may thus be promising molecular tools for the differential diagnosis of infections caused by these two species.
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Affiliation(s)
- K Chemlal
- Department of Microbiology, Mycobacteriology Unit, Institute of Tropical Medicine, B-2000 Antwerp, Belgium.
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Lopez AG, Craighead HG. Subwavelength surface-relief gratings fabricated by microcontact printing of self-assembled monolayers. Appl Opt 2001; 40:2068-2075. [PMID: 18357211 DOI: 10.1364/ao.40.002068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have designed and tested subwavelength diffractive optical elements consisting of surface-relief gratings made by microcontact printing of self-assembled monolayers. The first device is a beam deflector for 1.55-mum operation consisting of a surface-relief grating made up of eight pillars over one period (9.3 mum) of the grating. The widths of the pillars vary to approximate a linear phase profile within each grating period. The second device is a quarter-wave plate for 632.8-nm operation consisting of a subwavelength surface-relief grating with a 300-nm period and 58% duty cycle.
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Rudnicka W, Brzychcy M, Klink M, Lopez AG, Fonteyne PA, Rüsch-Gerdes S, Rózalska B. The production of nitric oxide and tumor necrosis factor by murine macrophages infected with mycobacterial strains differing by hemolytic activity. Microbiol Immunol 1999; 43:637-44. [PMID: 10529104 DOI: 10.1111/j.1348-0421.1999.tb02451.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/28/2022]
Abstract
In this study, we compared the secretion of nitric oxide (NO) and tumor necrosis factor (TNF-alpha) by murine macrophages infected in vitro with hemolytic or unhemolytic mycobacteria isolates. We observed that unhemolytic mycobacteria induced more intensive NO production by macrophages and were more susceptible to bactericidal effect of mononuclear phagocytes than hemolytic mycobacterial strains. In contrast, the high-virulence hemolytic isolates induced significantly stronger TNF-alpha production by infected macrophages than the low-virulence unhemolytic bacilli.
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Affiliation(s)
- W Rudnicka
- Department of Infectious Biology, Institute of Microbiology and Immunology, University of Lódź, Banacha, Poland
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20
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Lopez AG, Craighead HG. Wave-plate polarizing beam splitter based on a form-birefringent multilayer grating. Opt Lett 1998; 23:1627-1629. [PMID: 18091866 DOI: 10.1364/ol.23.001627] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We have fabricated a novel device that acts as a quarter-wave plate at normal incidence and as a polarizing beam splitter at an angle of incidence of ~40 deg . The device is made from a multilayer (SiO(2) /Si(3)N(4)) surface-relief zeroth-order one-dimensional grating with a period of 0.3 mum . The device is designed for an operating wavelength of 632.8 nm. We designed the device by using rigorous coupled-wave analysis and fabricated it by direct-write electron-beam lithography and reactive ion etching. Measurements confirmed the performance of the device as a wave plate and as a polarizing beam splitter.
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Quillen JE, Rossen JD, Oskarsson HJ, Minor RL, Lopez AG, Winniford MD. Acute effect of cigarette smoking on the coronary circulation: constriction of epicardial and resistance vessels. J Am Coll Cardiol 1993; 22:642-7. [PMID: 8354792 DOI: 10.1016/0735-1097(93)90170-6] [Citation(s) in RCA: 140] [Impact Index Per Article: 4.5] [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: 01/30/2023]
Abstract
OBJECTIVES This study was performed to determine the acute effect of cigarette smoking on proximal and distal epicardial conduit and coronary resistance vessels. BACKGROUND Cigarette smoking causes constriction of epicardial arteries and a decrease in coronary blood flow in patients with coronary artery disease, despite an increase in myocardial oxygen demand. The role of changes in resistance vessel tone in the acute coronary hemodynamic effect of smoking has not been examined. METHODS Twenty-four long-term smokers were studied during cardiac catheterization after vasoactive medications had been discontinued. The effect of smoking one cigarette 10 to 15 mm long on proximal and distal conduit vessel segments was assessed before and immediately after smoking and at 5, 15 and 30 min after smoking (n = 8). To determine the effect of smoking on resistance vessels, coronary flow velocity was measured in a nonobstructed artery with a 3F intracoronary Doppler catheter before and for 5 min after smoking (n = 8). Eight patients were studied without smoking to control for spontaneous changes in conduit arterial diameter (n = 5) and resistance vessel tone (n = 3). RESULTS The average diameter of proximal coronary artery segments decreased from 2.56 +/- 0.12 mm (mean +/- SEM) before smoking to 2.41 +/- 0.09 mm 5 min after smoking (-5 +/- 2%, p < 0.05). Distal coronary diameter decreased from 1.51 +/- 0.07 to 1.39 +/- 0.06 mm (-8 +/- 2%, p < 0.01). Marked focal vasoconstriction after smoking was observed in two patients. Coronary diameter returned to baseline by 30 min after smoking. There was no change in vessel diameter in control patients. Despite a significant increase in the heart rate-mean arterial pressure product, coronary flow velocity decreased by 7 +/- 4% (p < 0.05) and coronary vascular resistance increased by 21 +/- 4% (p < 0.01) 5 min after smoking. There was no change in these variables in the control subjects. CONCLUSIONS Smoking causes immediate constriction of proximal and distal epicardial coronary arteries and an increase in coronary resistance vessel tone, despite an increase in myocardial oxygen demand. These acute coronary hemodynamic effects may contribute to the adverse cardiovascular consequences of cigarette smoking.
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Affiliation(s)
- J E Quillen
- Department of Internal Medicine, University of Iowa College of Medicine, Iowa City 52242
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Abstract
Although both intravenous dipyridamole and adenosine have been used to produce coronary vasodilation during cardiac imaging, the relative potency of the commonly administered doses of these agents has not been evaluated. Accordingly, the coronary and systemic hemodynamic effects of intravenous adenosine (140 micrograms/kg per min) and intravenous dipyridamole (0.56 mg/kg over 4 min) were compared with a maximally dilating dose of intracoronary papaverine in 15 patients. Coronary blood flow responses were assessed using a Doppler catheter in a nonstenotic coronary artery. The protocol was discontinued in two patients because of transient asymptomatic atrioventricular (AV) block during adenosine infusion. The mean heart rate increased more with adenosine (11 +/- 9 beats/min) and dipyridamole (11 +/- 7 beats/min) than with papaverine (4 +/- 3 beats/min, p less than 0.05 vs. adenosine and papaverine). The mean arterial pressure decreased less with dipyridamole (-10 +/- 3 mm Hg) and papaverine (-9 +/- 4 mm Hg) than with adenosine (-16 +/- 5 mm Hg, p less than 0.01 vs. dipyridamole and papaverine). The peak/rest coronary blood flow velocity ratio was greater with papaverine (3.9 +/- 1.1) than with adenosine (3.4 +/- 1.2, p less than or equal to 0.05 vs. papaverine) or dipyridamole (3.1 +/- 1.2, p less than 0.01 vs. papaverine). A larger decrease in coronary resistance as measured by the coronary vascular resistance index occurred with papaverine (0.25 +/- 0.06) and adenosine (0.26 +/- 0.09) than with dipyridamole (0.31 +/- 0.10, p less than 0.01 vs. papaverine, p less than 0.05 vs. adenosine).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J D Rossen
- Department of Internal Medicine, University of Iowa College of Medicine, Iowa City 52242
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Faraci FM, Lopez AG, Breese K, Armstrong ML, Heistad DD. Effect of atherosclerosis on cerebral vascular responses to activation of leukocytes and platelets in monkeys. Stroke 1991; 22:790-6. [PMID: 2057980 DOI: 10.1161/01.str.22.6.790] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The goal of this study was to test the hypothesis that atherosclerosis alters responses of cerebral arteries and the ocular circulation to the activation in vivo of leukocytes and platelets. We measured blood flow to the brain and eye using microspheres and pressure in the cerebral microvessels of normal and atherosclerotic monkeys. The intracarotid injection of 10(-7) M N-formyl-L-methionyl-L-leucyl-L-phenylalanine to activate leukocytes did not alter cerebral blood flow in 11 normal or 10 atherosclerotic monkeys but increased the resistance of large cerebral arteries by 46 +/- 11% (mean +/- SEM) in the atherosclerotic animals. The injection of N-formyl-L-methionyl-L-leucyl-L-phenylalanine did not alter blood flow to the eye in 10 normal monkeys but decreased blood flow to the choroid by 38 +/- 9% in 11 atherosclerotic monkeys. The intracarotid injection of 3 x 10(-9) M prostaglandin E2, a leukocyte product, produced an increase in the resistance of large cerebral arteries in five atherosclerotic but not in six normal monkeys. Prostaglandin E2 reduced blood flow to the retina and choroid in the atherosclerotic monkeys by 62 +/- 22% and 65 +/- 17%, respectively. The intracarotid infusion of 25 micrograms/min collagen to activate platelets increased cerebral blood flow by 21 +/- 5% in 10 normal monkeys but did not alter it in 11 atherosclerotic monkeys. Collagen did not alter blood flow to the choroid in 10 normal monkeys but decreased it by 29 +/- 8% in 11 atherosclerotic monkeys.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- F M Faraci
- Department of Internal Medicine, Veterans Administration Medical Center, Iowa City, Iowa
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