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Sprenger HG, Langebeek N, Mulder PGH, Ten Napel CHH, Vriesendorp R, Hoepelman AIM, Legrand JC, Koopmans PP, Bravenboer B, Ten Kate RW, Groeneveld P, Bierman W, van der Werf T, Gisolf E, Richter C. A randomized controlled trial of single-class maintenance therapy with abacavir/lamivudine/zidovudine after standard triple antiretroviral induction therapy: final 96-week results from the FREE study. HIV Med 2014; 16:122-31. [PMID: 25472825 DOI: 10.1111/hiv.12186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2014] [Indexed: 12/13/2022]
Abstract
OBJECTIVES The aim of the study was to test the antiviral efficacy of a triple nucleoside reverse transcriptase inhibitor (NRTI) regimen, with potential beneficial metabolic effects, as maintenance therapy after induction with dual NRTIs and a boosted protease inhibitor (PI). METHODS An open-label, noninferiority study was carried out. Antiretroviral therapy (ART)-naïve patients with CD4 count ≤ 350 cells/μL and HIV-1 RNA >30000 copies/mL (n=207) were treated with zidovudine/lamivudine and lopinavir/ritonavir. After achieving HIV-1 RNA <50 copies/mL on two consecutive occasions between weeks 12 and 24 after baseline, 120 patients (baseline: median HIV-1 RNA 5.19 log10 copies/mL; median CD4 count 180 cells/μL) were randomized to receive abacavir/lamivudine/zidovudine (ABC/3TC/ZDV) (n=61) or to continue the PI-based ART (n=59). RESULTS For the proportions of patients (intention-to-treat; missing=failure) with HIV-1 RNA <400 copies/mL (PI group, 66%; ABC/3TC/ZDV group, 71%) and <50 copies/mL (PI group, 63%; ABC/3TC/ZDV group, 62%) at 96 weeks, switching to ABC/3TC/ZDV was noninferior compared with continuing the PI regimen; the difference in failure rate (ABC/3TC/ZDV minus PI) was -4.4 percentage points [95% confidence interval (CI) -21.0 to +12.3 percentage points] and +0.4 percentage points (95% CI -16.9 to +17.7 percentage points), respectively. In the per protocol analysis, the difference in virological failure for HIV-1 RNA >400 copies/mL (0 of 39 patients in the PI group and two of 45 patients in the NRTI group) and for HIV-1 RNA >50 copies/mL (two of 39 and three of 45 patients, respectively) was +4.4 percentage points (95% CI -2.1 to +11.0 percentage points) and +1.5 percentage points (95% CI -8.6 to +11.7 percentage points), respectively, also showing noninferiority. Serum lipids significantly improved in the NRTI group, but not in the PI arm. CONCLUSIONS A single-class NRTI regimen after successful induction with standard ART had similar antiviral efficacy compared to continuation of a PI-based regimen at 96 weeks after baseline, with improved serum lipids.
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Affiliation(s)
- H G Sprenger
- Department of Internal Medicine, Division of General Internal Medicine and Infectious Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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Langebeek N, Sprenger HG, Gisolf EH, Reiss P, Sprangers MAG, Legrand JC, Richter C, Nieuwkerk PT. A simplified combination antiretroviral therapy regimen enhances adherence, treatment satisfaction and quality of life: results of a randomized clinical trial. HIV Med 2013; 15:286-90. [DOI: 10.1111/hiv.12112] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/02/2013] [Indexed: 12/20/2022]
Affiliation(s)
- N Langebeek
- Department of Internal and Infectious Diseases; Rijnstate Hospital; Arnhem the Netherlands
| | - HG Sprenger
- Department of Internal Medicine, Section Infectious Diseases; University of Groningen, University Medical Centre Groningen; Groningen the Netherlands
| | - EH Gisolf
- Department of Internal and Infectious Diseases; Rijnstate Hospital; Arnhem the Netherlands
| | - P Reiss
- Department of Internal Medicine; Department of Global Health; Academic Medical Center; Amsterdam the Netherlands
| | - MAG Sprangers
- Department of Medical Psychology; Academic Medical Center; Amsterdam the Netherlands
| | - JC Legrand
- Teaching Hospital of Charleroi; Brussels Belgium
| | - C Richter
- Department of Internal and Infectious Diseases; Rijnstate Hospital; Arnhem the Netherlands
| | - PT Nieuwkerk
- Department of Medical Psychology; Academic Medical Center; Amsterdam the Netherlands
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Sprenger HG, ten Napel CHH, Vriesendorp R, Hoepelman IM, Legrand JC, Koopmans PP, Kasteren ME, Bravenboer B, ten Kate RW, Groeneveld PHP, Werf TS, Gisolf EH, Richter C. FREE trial: induction therapy with ART (abacavir/lamivudine/lopinavir/r) followed by maintenance regimen with triple NRTI, compared to continued ART. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p55] [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: 11/10/2022] Open
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Méric de Bellefon L, Legrand JC, Codden T, Carlier E, Vanhaeverbeek M. [Klebsiella pneumoniae septicaemia and meningitis in a diabetic patient with an hepatic abscess]. Rev Med Brux 2007; 28:460-463. [PMID: 18069521] [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: 05/25/2023]
Abstract
Klebsiella pneumoniae infections show particular features depending on the geographical localization as well as comorbidity factors. We are presenting the case of a european patient with diabetes mellitus who presented a septicaemia, a meningitis as well as an hepatic abscess due to a K. pneumoniae and whose evolution was excellent under antibiotics. Usually described among Asian patients, the primary hepatic K. pneumoniae abscess, which is a clinical entity recently described, can give rise to potentially serious and multiple septic metastasis. We also discuss the diagnostic and therapeutic attitudes related to this infection.
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Affiliation(s)
- L Méric de Bellefon
- Services de Médecine Interne, C.H.U. de Charleroi, Hôpital André Vésale, Montigny-le-Tilleul.
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Laterre PF, Colardyn F, Delmée M, De Waele J, Legrand JC, Van Eldere J, Vergison A, Vogelaers D. Antimicrobial therapy for intra-abdominal infections: guidelines from the Infectious Disease Advisory Board (IDAB). Acta Chir Belg 2006; 106:2-21. [PMID: 16612906 DOI: 10.1080/00015458.2006.11679825] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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: 10/21/2022]
Abstract
Intra-abdominal infection is a common cause of severe sepsis in a hospital setting and remains associated with a significant morbidity, mortality and resource use. Early adequate surgery or drainage remain the cornerstones of intra-abdominal infection management and impact on patients outcome. Concomitant early and adequate empiric antimicrobial therapy further influences patients morbidity and mortality. Multiple empirical regimens have been proposed in this setting, but rarely supported by well designed, randomized-controlled studies. The current manuscript summarizes the recommendations of the Infection Disease Advisory Board on the management of intra-abdominal infections. Empiric antimicrobial therapy for the most common causes of abdominal infections is proposed. In addition, particular attention has been paid on antibiotic treatment duration.
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Affiliation(s)
- P F Laterre
- Department of Critical Care Medicine, St Luc University Hospital, Brussels, Belgium.
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Legrand JC. [The quest of quality in the field of infectious disease at the hospital]. Rev Med Brux 2005; 26:493-503. [PMID: 16454153] [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: 05/06/2023]
Abstract
The implementation of a quality program in the field of the infectious diseases requires the prior definition of criteria (efficacy, low toxicity, low cost, less emergence of resistant strains) but also the target (the patient it-self, his or her community, the health system as a whole). A lot of tools are questioned: antimicrobial policy (escalation/streamlining, restricted formularies, antibiotics rotation), guidelines, relational tools (booklets and CME, prescription's formularies, computer's help and the Web) but also the role of an infectious diseases specialist and an antimicrobial management team. Finally, we outline some processes of evaluation.
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Affiliation(s)
- J C Legrand
- Clinique des Maladies Infectieuses, Service de Médecine Interne, C.H.U. de Charleroi
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Legrand JC, Struelens M. [For rational use of antibiotics in the hospital]. Rev Med Brux 2001; 22:15-25. [PMID: 11252901] [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
Being faced with the risks of emergence and spread of antibiotic multiresistant bacterial strains in the hospital, it is a joint responsibility of all medical specialities and hospital management to promote the protection of the microbial ecology. Strategies to optimize antimicrobial use and practical approaches are discussed here. The need of mobilization of the entire hospital community and implementation of infectious diseases consultants is emphasized, as recommended by the "Groupement pour le Dépistage, l'Etude et la Prévention des Infections Hospitalières" (GDEPIH).
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Affiliation(s)
- J C Legrand
- Service de Médecine Interne-Maladies Infectieuses, C.H.U. de Charleroi, Site de Charleroi
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Abstract
OBJECTIVE The 'HICPAC guidelines', published in the USA in 1995 stressed the crucial role of restrictive usage of glycopeptides in the strategy to limit the emergence and spread of resistant enterococci. Because controversy still remains in Belgium on the necessity and feasability of restricting glycopeptide usage, the infectious diseases advisory board (IDAB) developed a consensus statement on the judicious use of glycopeptides in Belgium. METHODS The literature on the indications for glycopeptide treatment was reviewed, categorized and discussed by a working party of the IDAB.Consequently, the IDAB reached consensus on the warranted indications for glycopeptide use in Belgium. RESULTS The opinion of the IDAB-members is reported in a consensus statement specifying the indications for treatment and for prophylaxis with glycopeptide antimicrobials, as well as the situations where glycopeptides should not be used, taking into account the specific epidemiology of bacterial resistance, the availability of antibiotics and the common prescribing practices in Belgium. CONCLUSIONS The IDAB concludes that restrictive usage of glycopeptides must also be a priority in Belgium. Guidelines on the judicious use of these antibiotics adapted to the national situations must contribute to this objective.
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Affiliation(s)
- B Gordts
- Departments of Microbiology and Infection Control, AZ St Jan, Brugge, Belgium.
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Prost AC, Ménégaux F, Langlois P, Vidal JM, Koulibaly M, Jost JL, Duron JJ, Chigot JP, Vayre P, Aurengo A, Legrand JC, Rosselin G, Gespach C. Differential transferrin receptor density in human colorectal cancer: A potential probe for diagnosis and therapy. Int J Oncol 1998; 13:871-5. [PMID: 9735419 DOI: 10.3892/ijo.13.4.871] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 11/06/2022] Open
Abstract
Transferrin receptor density was investigated in human colorectal surgical specimens. Crude membranes were prepared from 23 cancer tumors (adenocarcinoma or malignant villous tumor) and 3 non-cancer tumors (polyadenoma or villous tumor) and 26 adjacent control mucosa. Contrary to non-cancer tumors, Scatchard analysis of 125I-transferrin binding data evidenced higher maximal transferrin binding capacity and lower dissociation constant in cancer tissues (Bmax cancer 1.828+/-0.320 nmol/g, Kd 24.1+/-4.7 nM), as compared to paired control colonic mucosa (Bmax contol 0.851+/-0.182 nmol/g, Kd 30.7+/-7.3 nM), paired t-tests: Bmax p<0.001, Kd p<0.05). As the cancer/control Bmax ratio was 2.6+/-0.4,transferrin carrier constructs should be proposed for cancer imaging or therapy.
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Affiliation(s)
- A C Prost
- Service Central de Medecine Nucleaire, Centre Hospitalier Le Mans, 72037 Le-Mans, France
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Aupetit-Faisant B, Blanchouin N, Legrand JC. [Dysfunction of the aldosterone synthesis pathway as a marker of malignity in symptomatic and asymptomatic adrenal masses]. Bull Acad Natl Med 1995; 179:1355-65; discussion 1365-7. [PMID: 8556410] [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: 01/31/2023]
Abstract
Fundamental research performed in the author's laboratory led to the understanding of mechanisms of the mineralocorticoid biosynthetic pathway. Sensitive assays were then developed to allow measurement of the different mineralocorticoid metabolites in several biological fluids. Using these methods biological markers that contribute to the differential diagnosis between benign and malignant adrenal tumors were identified. In the present paper we report that the exploration of the entire mineralocorticoid pathway in the plasma of patients during basal state and after stimulation and/or inhibition test is a powerful tool to predict or validate diagnosis of adrenal malignancy. Moreover, mineralocorticoid exploration can help differentiate between two different types of malignancy, ie malignant cortical adrenaloma and metastases of other cancer. The biochemical mechanisms leading to the atypical mineralocorticoid metabolism in the case of malignant cortical adrenaloma are now under study.
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Legrand JC, Bastin F, Belva P, Chastel C, Renaux J, Van Eukem P. Piperacillin-tazobactam treatment for severe intra-abdominal infections. Acta Chir Belg 1995; 95:162-5. [PMID: 7610751] [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: 01/26/2023]
Abstract
In this limited series of 23 patients suffering from severe or life-threatening intra-abdominal infection, piperacillin + tazobactam, together with adequate surgical drainage and resections, cured 78% of our patients and eradicated almost all the pathogens. Side effects included essentially eosinophilia and elevation of transaminases but was never severe. Piperacillin + tazobactam seem thus to be an acceptable treatment, associated with correct surgical drainage. This regimen has to be compared in appropriate trial versus gold standard therapy, such as imipenem, a beta-lactam with aminoglucoside and imidazole or clindamycin or with broad spectrum beta-lactam and other inhibitors or beta-lactamases, but our rate of cure is impressive in such a population.
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Affiliation(s)
- J C Legrand
- Department of Internal Medicine, Hôpital Civil de Charleroi, Belgium
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12
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Benoliel JJ, Collin E, Mauborgne A, Bourgoin S, Legrand JC, Hamon M, Cesselin F. Mu and delta opioid receptors mediate opposite modulations by morphine of the spinal release of cholecystokinin-like material. Brain Res 1994; 653:81-91. [PMID: 7982079 DOI: 10.1016/0006-8993(94)90375-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [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: 01/28/2023]
Abstract
The possible modulations by morphine and various opioids of the spinal release of cholecystokinin-like material (CCKLM) evoked by 30 mM K+ was studied in vitro, using slices of the dorsal part of the rat lumbar enlargement superfused with an artificial cerebrospinal fluid. Addition of the mu agonist, DAGO (0.1-10 microM), to the perfusing fluid produced a concentration-dependent decrease in the peptide release, which could be prevented by the preferential mu antagonist, naloxone. Complex modulations were induced by the delta agonist, DTLET, as this drug inhibited CCKLM release when added at 10 nM-3 microM to the perfusing fluid, but enhanced it at 10 microM. Both effects were preventable by the delta antagonists naltrindole and ICI 154129, suggesting that delta receptors, possibly of different subtypes, mediated the inhibition and stimulation by DTLET. Morphine also exerted a biphasic effect, as the alkaloid decreased CCKLM release at 0.01-0.1 microM and enhanced it at 10 microM. Morphine-induced inhibition was preventable by naloxone, whereas its stimulatory effect could be blocked by naltrindole and ICI 154129. Although inactive on its own on CCKLM release, the selective kappa 1 agonist U 50488H (1 microM) prevented the inhibitory effects of both DAGO (10 microM) and morphine (0.1 microM), suggesting the existence of interactions between kappa 1 and mu receptors within the dorsal zone of the rat spinal cord. These data indicate that low concentrations of morphine exert an inhibitory influence on spinal CCKergic neurons that depends on the stimulation of mu opioid receptors. The excitatory influence of 10 microM morphine likely results from the simultaneous stimulation of mu, delta and kappa receptors, as the inhibitory effect of mu receptor stimulation can be masked by that of kappa 1 receptors, allowing only the expression of a delta-dependent excitatory effect similar to that induced by 10 microM DTLET.
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Affiliation(s)
- J J Benoliel
- INSERM U 288, Neurobiologie Cellulaire et Fonctionnelle, Faculté de Médecine Pitié-Salpêtrière, Paris, France
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Zongazo MA, Carayon A, Masson F, Isnard R, Eurin J, Maistre G, Barthélemy C, Prost AC, Legrand JC. Atrial natriuretic peptide during water deprivation or hemorrhage in rats. Relationship with arginine vasopressin and osmolarity. ACTA ACUST UNITED AC 1994; 86:167-75. [PMID: 1343602 DOI: 10.1016/0928-4257(92)90003-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The concentrations of atrial natriuretic peptide (ANP) in atria, hypothalami and plasma were investigated in relation to the variations of the plasma endogenous immunoreactive arginine vasopressin (Ir-AVP) during water deprivation or hemorrhage in normal conscious Wistar rats. Furthermore, the in vitro and in vivo effect of extracellular hyperosmolarity on ANP release from right atrium and hypothalamus was examined. Water deprivation elevated circulating immunoreactive ANP (Ir-ANP: pg/ml) to 153 +/- 7 (24 h); 174 +/- 1 (48 h) from the control level (109.6 +/- 7.8). This increase in Ir-ANP concentration which correlated with atrial (r = -0.93) or hypothalamic (r = -0.87) Ir-ANP content decrease, was associated with significantly enhanced levels of plasma Ir-AVP, plasma sodium, osmolarity and hematocrit. An acute volume depletion by hemorrhage significantly reduced plasma Ir-ANP (67 +/- 8.4 pg/ml) from the sham operated level (140 +/- 18 pg/ml). Plasma Ir-AVP was elevated dramatically (207.4 +/- 53.4 pg/ml) compared with the sham operated level (8.8 +/- 2.6 pg/ml). These results, indicating the lack of correlation between plasma Ir-ANP and Ir-AVP in vivo, suggest that the ANP secretion, which is regulated mainly by plasma volume, may be modulated by a change in plasma osmolarity. Extracellular hyperosmolarity stimulated the ANP release from superfused sliced normal rat atria and hypothalami.
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Affiliation(s)
- M A Zongazo
- Service de Biochimie Médicale, Faculté de Médecine, Pitié-Salpêtrière, Paris, France
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Artigou JY, Salloum J, Carayon A, Lechat P, Maistre G, Isnard R, Legrand JC, Grosgogeat Y. [Changes in plasma endothelin during coronary spasm]. Arch Mal Coeur Vaiss 1993; 86:1581-6. [PMID: 8010858] [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: 01/28/2023]
Abstract
The role of endothelin, a powerful vasoconstrictor, was studied in coronary spasm. A methylergonovine stress test was performed in patients with normal coronary angiography. Patients who developed spasm (Group I, n = 6) were compared with those who did not (Group II, n = 6). Plasma endothelin was measured at 8, 11 a.m., 2 p.m., 4, 7, 9, 11 p.m. and 1 a.m. The stress test was carried out at 17 hours and an additional endothelin measurement was performed during spasm in positive cases. The clinical characteristics of the two groups were comparable especially with regards to cardiovascular risk factors. Except for the value recorded during coronary spasm, the plasma endothelin levels were significantly higher in the group with coronary spasm. A time-dependent variation was observed in both groups with higher endothelin levels in the morning. In group I the plasma endothelin levels were higher under basal conditions and during spasm in patients with spastic angina.
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Affiliation(s)
- J Y Artigou
- Service de cardiologie, Hôpital Pitié-Salpêtrière, Paris
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15
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Azizi C, Carayon A, Masson F, Noé E, Barthelemy C, Eurin J, Maistre G, Legrand JC. Mechanisms of isoproterenol-induced atrial natriuretic peptide release from superfused rabbit atria. Am J Physiol 1993; 265:H1283-8. [PMID: 8238415 DOI: 10.1152/ajpheart.1993.265.4.h1283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The mechanisms for isoproterenol-induced atrial natriuretic peptide (ANP) release were studied in superfused rabbit sliced right atria. Addition of 1 microM norepinephrine to this preparation induced a significant monophasic twofold rise in ANP release. This effect was abolished by 1 microM propranolol and mimicked by 1 microM isoproterenol. Furthermore, addition of 200 microM 3-isobutyl-1-methylxanthine (IBMX) to the superfusing medium potentiated isoproterenol effect 31%. In addition, superfusion of slices with 0.5 mM N6,2-O-dibutyryladenosine 3',5'-cyclic monophosphate [(Bu)-2cAMP] enhanced ANP release in the same manner as the beta-agonist. After isoproterenol stimulation, adenosine 3',5'-cyclic monophosphate (cAMP) concentration in effluents increased significantly. ANP secretory response to isoproterenol was unaffected by extracellular calcium concentration or 1 mM ethylene glycol-bis(beta-aminoethyl ether)-N,N,N',N'-tetraacetic acid (EGTA). Finally, 10 microM indomethacin significantly reduced isoproterenol-stimulated ANP release. It is concluded that 1) norepinephrine-induced ANP release is mediated by its beta-agonist activity, 2) isoproterenol-stimulated release appears to be mediated by cAMP, 3) isoproterenol effect does not require extracellular calcium, and 4) prostaglandins may be involved in this beta-adrenergic effect.
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Affiliation(s)
- C Azizi
- Service de Biochimie, Faculté de Médecine Pitié-Salpêtrière, Paris, France
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Isnard R, Carayon A, Eurin J, Maistre G, Bouanani N, Barthelemy C, Crozatier B, Komajda M, Legrand JC. Glomerular atrial natriuretic factor receptors in experimental congestive heart failure. Am J Physiol 1993; 265:H923-8. [PMID: 8214128 DOI: 10.1152/ajpheart.1993.265.3.h923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Heart failure is usually characterized by a relative insensitivity to atrial natriuretic factor (ANF). Downregulation of ANF receptors has been reported but remains controversial. Renal response to ANF infusion, glomerular ANF receptors, and guanosine 3',5'-cyclic monophosphate (cGMP) production have been studied in rabbits with congestive heart failure (CHF) after traumatic aortic regurgitation and abdominal aortic stenosis. Diuresis and natriuresis induced by ANF infusions were significantly decreased in CHF animals. Plasma cGMP was higher in CHF rabbits before ANF administration than in controls (37.6 +/- 7.2 vs. 17.1 +/- 3.9 pmol/ml, P < 0.02) and increased to a same level after ANF in both groups (48.8 +/- 4.2 vs. 52.5 +/- 2.8 pmol/ml, NS). No difference was found in glomerular ANF receptor density (436 +/- 54 vs. 425 +/- 57 fmol/mg protein, NS) nor in affinity between the two groups (dissociation constant; 240 +/- 24 vs. 347 +/- 49 pM, NS). Moreover, in vitro glomerular cGMP production in response to exogenous ANF was preserved. In conclusion, despite a blunted renal response to ANF in vivo, glomerular ANF receptors were unchanged in this model, and no defect in cGMP production in response to ANF was found. This suggests the existence of an intracellular defect beyond the second messenger.
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Affiliation(s)
- R Isnard
- Service de Cardiologie, Hôpital Pitié-Salpétrière, Paris, France
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Artigou JY, Salloum J, Carayon A, Lechat P, Maistre G, Isnard R, Komajda M, Legrand JC, Grosgogeat Y. Variations in plasma endothelin concentrations during coronary spasm. Eur Heart J 1993; 14:780-4. [PMID: 8325305 DOI: 10.1093/eurheartj/14.6.780] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
A provocation test using methylergometrine was carried out in patients with a normal coronary angiogram. Patients exhibiting spasm (Group 1, n = 6) were compared with non-spasm patients (Group II, n = 6). The endothelin concentration was determined in all cases at 0800, 1100, 1400, 1600, 1900, 2100, 2300 and 0100 h. The provocation test was carried out at 1700 h and an additional determination was made during spasm if the test was positive. The two groups had similar clinical characteristics and did not differ in terms of risk factors. Apart from the value recorded during spasm, the endothelin plasma level was significantly higher in Group I. A time x measurement interaction was noted in both groups, with a higher endothelin level in the morning. The endothelin level increased significantly during spasm in Group I patients. The plasma concentration of endothelin appeared to be higher in the basal state and during spasm in patients exhibiting spastic angina.
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Affiliation(s)
- J Y Artigou
- Cardiology Department, Hôpital Pitié-Salpêtrière, Paris, France
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Aupetit-Faisant B, Battaglia C, Zenatti M, Emeric-Blanchouin N, Legrand JC. Hypoaldosteronism accompanied by normal or elevated mineralocorticosteroid pathway steroid: a marker of adrenal carcinoma. J Clin Endocrinol Metab 1993; 76:38-43. [PMID: 8421100 DOI: 10.1210/jcem.76.1.8421100] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In order to find a biochemical marker to assist the physician in the difficult differential diagnosis between malignant and nonmalignant adrenal tumors, plasma levels of the mineralocorticosteroids (deoxycorticosterone, 18-hydroxydeoxycorticosterone, corticosterone, 18-hydroxycorticosterone, and aldosterone) were determined. The same method (RIA which is preceded by a crucial separation step) was used to measure all these steroids including aldosterone. The subjects included 15 adults presenting various clinical signs of adrenocortical tumors (histopathologically: 6 with adrenal carcinoma, 1 with a history of adrenal carcinoma, 1 with adrenal metastasis from other forms of cancer, 6 with adenoma, and 1 with hyperplasia). The results show that both presurgery and during a recurrence of adrenal carcinoma, hypoaldosteronism occurs which contrasts with the normal or even elevated levels of some aldosterone precursors. In the 7 cases of adrenal cortical carcinoma, this dysfunction of the aldosterone pathway was detected regardless of the impairment of the other steroidogenesis pathways, whereas it was never found with a nonmalignant tumor. Despite the limited number of cases so far available, these findings suggest that detection of abnormalities of the aldosterone pathway, and particularly the detection of hypoaldosteronism by an assay method involving a crucial steroid separating step, could contribute to a differential diagnosis between benign and malignant adrenocortical tumor and between adrenal metastasis and other forms of cancer.
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Taquet H, Komajda M, Grenier O, Belas F, Landault C, Carayon A, Lechat P, Grosgogeat Y, Legrand JC. Plasma calcitonin gene-related peptide decreases in chronic congestive heart failure. Eur Heart J 1992; 13:1473-6. [PMID: 1464337 DOI: 10.1093/oxfordjournals.eurheartj.a060088] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
To investigate the role of calcitonin gene-related peptide (CGRP) in cardiac failure, a sensitive and specific radioimmunoassay was developed to study plasma levels of CGRP in 37 normal subjects and 41 patients with heart failure (HF). The mean plasma levels of CGRP were 294.3 pg.ml-1 (SEM: 41.4) in normal subjects and 121.2 pg.ml-1 (SEM: 21.2) in HF patients. The significant decrease observed in HF patients suggests that CGRP is involved in the pathogenesis of heart failure via a direct effect or via modulation of sympathetic nervous activity.
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Affiliation(s)
- H Taquet
- Service de Biochimie Médicale, Groupe hospitalier Pitié-Salpêtrière, Paris, France
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20
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Benoliel JJ, Bourgoin S, Mauborgne A, Pohl M, Legrand JC, Hamon M, Cesselin F. GABA, acting at both GABAA and GABAB receptors, inhibits the release of cholecystokinin-like material from the rat spinal cord in vitro. Brain Res 1992; 590:255-62. [PMID: 1330214 DOI: 10.1016/0006-8993(92)91103-l] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Superfusion of slices of the dorsal zone of the lumbar enlargement of the rat spinal cord with an artificial cerebrospinal fluid allowed the collection of cholecystokinin-like material (CCKLM) whose Ca(2+)-dependent release could be evoked by tissue depolarization with 30 mM K+. Studies on the possible influence of GABA and related agonists on this process showed that the amino acid, the GABAA agonist, muscimol, and the GABAB agonist, baclofen, inhibited the K(+)-evoked release of CCKLM from the rat spinal cord in a concentration-dependent manner. Maximal inhibition did not exceed -40% with either agonist. Furthermore, the effects of GABAA and GABAB receptor stimulation were not additive. Whereas the effects of muscimol (10 microM) and baclofen (1 microM) could be completely antagonized by bicuculline (1 microM) and phaclofen (10 microM), respectively, complete blockade of the inhibition by GABA (1 microM) could only be achieved in the presence of both antagonists. These data indicate that both GABAA and GABAB receptors are involved in the negative influence of GABA onto CCK-containing neurones within the dorsal horn of the rat spinal cord. Apparently, these receptors are not located on CCK-containing neurones themselves, since the inhibitory effect of GABA on the K(+)-evoked release of CCKLM could be completely prevented by tetrodotoxin (1 microM). As CCK acts centrally as an endogenous opioid antagonist, such a GABA-inhibitory control of spinal CCK-containing neurones might participate in the analgesic action of the amino acid via the intrathecal route.
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Affiliation(s)
- J J Benoliel
- INSERM U 288, Neurobiologie Cellulaire et Fonctionnelle, Paris, France
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21
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Cacoub P, Piette JC, Wechsler B, Bletry O, Godeau P, Carayon A, Maistre G, Legrand JC. Plasma endothelin-1 concentrations in polyarteritis nodosa. Ann Rheum Dis 1992; 51:704. [PMID: 1352096] [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: 03/25/2023]
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22
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Benoliel JJ, Mauborgne A, Bourgoin S, Legrand JC, Hamon M, Cesselin F. Opioid control of the in vitro release of cholecystokinin-like material from the rat substantia nigra. J Neurochem 1992; 58:916-22. [PMID: 1310726 DOI: 10.1111/j.1471-4159.1992.tb09344.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Possible interactions between Met-enkephalin and cholecystokinin (CCK)-containing neurons in the rat substantia nigra were investigated by looking for the effects of various opioid receptor ligands and inhibitors of enkephalin-degrading enzymes on the K(+)-evoked overflow of CCK-like material (CCKLM) from substantia nigra slices. The delta-opioid agonists D-Pen2, D-Pen5-enkephalin (50 microM) and Tyr-D-Thr-Gly-Phe-Leu-Thr (DTLET; 3 microM) enhanced, whereas the mu-opioid agonists Tyr-D-Ala-Gly-MePhe-Gly-ol (DAGO; 10 microM) and MePhe3, D-Pro4-morphiceptin (PL 017; 10 microM) decreased, the K(+)-evoked release of CCKLM. By contrast, the kappa-opioid agonist U-50488 H (5 microM) was inactive. The stimulatory effect of DTLET could be prevented by the delta antagonist ICI-154129 (50 microM), but not by the mu antagonist naloxone (1 microM). Conversely, the latter drug, but not ICI-154129, prevented the inhibitory effect of DAGO and PL 017. A significant increase in CCKLM overflow was observed upon tissue superfusion with the peptidase inhibitors kelatorphan or bestatin plus thiorphan. This effect probably resulted from the stimulation of delta-opioid receptors by endogenous enkephalins protected from degradation, because it could be prevented by ICI-154129 (50 microM). Furthermore the peptidase inhibitors did not enhance CCKLM release further when delta-opioid receptors were stimulated directly by DTLET (3 microM). These data indicate that opioids acting on delta and mu receptors may exert an opposite influence, i.e., excitatory and inhibitory, respectively, on CCK-containing neurons in the rat substantia nigra.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J J Benoliel
- INSERM U288, Neurobiologie Cellulaire et Fonctionnelle, Faculté de Médecine Pitié-Salpêtrière, Paris, France
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23
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Zongazo MA, Carayon A, Masson F, Maistre G, Noé E, Eurin J, Barthelemy C, Komajda M, Legrand JC. Effects of arginine vasopressin and extracellular osmolarity on atrial natriuretic peptide release by superfused rat atria. Eur J Pharmacol 1991; 209:45-55. [PMID: 1667640 DOI: 10.1016/0014-2999(91)90009-f] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This study investigated the characteristics of atrial natriuretic peptide (ANP) release from superfused sliced atria and ventricles of rats. Right atria spontaneously released more immunoreactive ANP (Ir-ANP: pg/min per mg tissue) (32 +/- 3) than did left atria (11 +/- 2) or right ventricles (1.5 +/- 0.5). Addition of 10(-9) to 10(-5) M of arginine vasopressin (AVP) to the superfusing fluid or increasing its osmolarity (290 to 490 mOsM) resulted in a significant increase of the Ir-ANP outflow from right atria. The effect of AVP was prevented by a specific V1 receptor antagonist, ([d(ch2)5Tyr(Me)]AVP). Superfusion with indomethacin (10(-5) M) did not alter spontaneous release but inhibited the peak levels of Ir-ANP induced by AVP (10(-5) M). Moreover, DDAVP, a specific V2 receptor agonist, did not induce Ir-ANP release. Ca(2+)-free medium alone or plus 1 mM EGTA induced a significant increase in basal Ir-ANP outflow. The Ir-ANP released chromatographed similarly to the standard alpha-rANP. These results suggest a specific stimulatory effect of AVP and osmolarity and a negative influence of extracellular Ca2+ on atrial spontaneous Ir-ANP release. It appears that the effect of AVP could be mediated by prostaglandin synthesis.
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Affiliation(s)
- M A Zongazo
- Service de Biochimie Médicale, Faculté de Médecine, Pitié-Salpêtriere, Paris, France
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24
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Berlin I, Crespo-Laumonnier B, Cournot A, Landault C, Aubin F, Legrand JC, Puech AJ. The alpha 2-adrenergic receptor antagonist yohimbine inhibits epinephrine-induced platelet aggregation in healthy subjects. Clin Pharmacol Ther 1991; 49:362-9. [PMID: 2015726 DOI: 10.1038/clpt.1991.42] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Onset of sudden death, myocardial infarction, and stroke occurs more likely in the morning hours. Similarly, a morning increase in epinephrine-induced platelet aggregation was observed accompanied by an increase in plasma catecholamines. Inhibition of the morning increase in platelet aggregation would be of therapeutic benefit. In this study the effect of the selective alpha 2-adrenergic receptor antagonist yohimbine on platelet aggregation was evaluated in healthy subjects. Yohimbine administered orally selectively antagonized epinephrine but not collagen, arachidonic acid, or adenosine diphosphate-induced ex vivo platelet aggregation. The lowest dose of yohimbine that significantly inhibited epinephrine-induced platelet aggregation was 8 mg. The inhibitory effect of yohimbine on platelet aggregation lasted 10 hours with the 12 mg dose. At the doses studied (4, 8, and 12 mg), yohimbine did not modify blood pressure, standing heart rate, or plasma catecholamine or glucose concentrations. Twelve milligrams of yohimbine moderately but significantly accelerated supine heart rate (mean maximal increase, 7 +/- 3 beats/min). Further clinical studies are needed to evaluate whether bedtime administration of 12 mg yohimbine may block the morning increase in epinephrine-induced platelet aggregation.
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Affiliation(s)
- I Berlin
- Department of Clinical Pharmacology, Hôpital Pitié-Salpêtrière, Paris, France
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25
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Benoliel JJ, Bourgoin S, Mauborgne A, Legrand JC, Hamon M, Cesselin F. Differential inhibitory/stimulatory modulation of spinal CCK release by mu and delta opioid agonists, and selective blockade of mu-dependent inhibition by kappa receptor stimulation. Neurosci Lett 1991; 124:204-7. [PMID: 1648690 DOI: 10.1016/0304-3940(91)90094-a] [Citation(s) in RCA: 47] [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: 12/28/2022]
Abstract
Opioid-cholecystokinin (CCK) interactions at the spinal level were investigated by looking for possible modulations by various opioid agonists of the release of cholecystokinin-like material (CCKLM) from slices of the dorsal zone of the rat lumbar enlargement. K(+)-evoked CCKLM overflow was reduced by 0.1-10 microM of the mu agonist DAGO or 10 nM to 3 microM of the delta agonist DTLET. By contrast, at a higer concentration (10 microM), the latter drug as well as morphine enhanced CCKLM overflow. Although inactive alone, the kappa opioid agonist U 50488 H (1 microM) prevented the inhibitory effect of DAGO without affecting that of DTLET. These data suggest that an opioid acting through the stimulation of mu, delta and kappa receptors (such as morphine) should produce a net increase in the spinal release of CCK.
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MESH Headings
- 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer
- Analgesics/pharmacology
- Animals
- Cholecystokinin/metabolism
- Enkephalin, Ala(2)-MePhe(4)-Gly(5)-
- Enkephalin, Leucine/analogs & derivatives
- Enkephalin, Leucine/pharmacology
- Enkephalins/pharmacology
- In Vitro Techniques
- Male
- Narcotic Antagonists
- Oligopeptides/pharmacology
- Pyrrolidines/pharmacology
- Rats
- Rats, Inbred Strains
- Receptors, Opioid/drug effects
- Receptors, Opioid/physiology
- Receptors, Opioid, delta
- Receptors, Opioid, kappa
- Receptors, Opioid, mu
- Spinal Cord/metabolism
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Affiliation(s)
- J J Benoliel
- INSERM U 288, Faculté de Médecine Pitié-Salpêtrière, Paris, France
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26
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Berlin I, Deray G, Maistre G, Masson F, Barthelemy C, Legrand JC, Jacobs C. Cicletanine does not affect plasma atrial natriuretic peptide concentration in healthy subjects. Eur J Clin Pharmacol 1990; 39:593-4. [PMID: 1965645 DOI: 10.1007/bf00316103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effect of 50 and 150 mg cicletanine, a new vasodilator antihypertensive, on plasma atrial natriuretic peptide (ANP), cyclic GMP and antidiuretic hormone has been investigated at rest and during standardized exercise, in a double blind cross over study in healthy subjects. Exercise significantly increased in plasma ANP, cyclic GMP and antidiuretic hormone concentrations, and cicletanine did not affect any of them either at rest or during exercise. Since the alpha-1 adrenoceptor blocker prazosine decreases, beta-adrenoceptor blockers increase and the vasodilator cicletanine does not alter the plasma ANP response to exercise, it is suggested that adrenergic receptors may be directly involved in the regulation of ANP secretion.
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Affiliation(s)
- I Berlin
- Department of Clinical Pharmacology, Hôpital Pitiè-Salpêtrière, Paris, France
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27
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Eurin J, Carayon A, Zongazo MA, Masson F, Barthelemy C, Maistre G, Rouby JJ, Eurin B, Legrand JC. Characteristics of atrial natriuretic hormone receptors in human pheochromocytomas. Acta Endocrinol (Copenh) 1990; 122:740-4. [PMID: 2165346 DOI: 10.1530/acta.0.1220740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The presence of functional receptors for human atrial natriuretic hormone in human pheochromocytomas was recently reported. The present study reports the binding of hANH as measured by Scatchard analysis in 4 human adrenal glands and in 5 human pheochromocytomas. Binding assays using [3H]ANH revealed a single class of high-affinity binding sites for hANH in both tissues. Human pheochromocytomas present a lower number of binding sites than normal human adrenal gland (Bmax of 7.1 +/- 2.1 vs 33.6 +/- 6.9 fmol/mg protein, respectively). However, the decreased number of ANH receptors was not paralleled by modifications of tissular cyclic GMP (cGMP). Moreover, plasma hANH concentrations in 7 patients with pheochromocytomas (20.2 +/- 2.7 pmol/l) were statistically higher than those obtained in 25 normal control humans (8.1 +/- 0.6 pmol/l, p less than 0.001). We also demonstrated the presence of immunoreactive ANH in the tumour itself.
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Affiliation(s)
- J Eurin
- Service de Biochimie, Faculté de médecine Pitié-Salpêtrière, Paris, France
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28
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Deray G, Chanson P, Maistre G, Warnet A, Eurin J, Barthelemy C, Masson F, Martinez F, Lubetzki J, Legrand JC. Atrial natriuretic factor in patients with acromegaly. Eur J Clin Pharmacol 1990; 38:409-13. [PMID: 2143136 DOI: 10.1007/bf02336675] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In acromegaly the plasma volume is chronically elevated and it returns to normal when the disease is successfully treated. To define the role of ANF in such a chronic disorder of extracellular fluid volume homeostasis the plasma level was assayed in 37 acromegalic patients with active or inactive (successfully treated) disease. Five patients were studied before and after therapy. The effects of acute change in sodium-fluid status on plasma ANF levels was examined in 7 active and 4 inactive acromegalic patients and in 7 healthy subjects. As compared to 14 patients with inactive acromegaly, 23 patients with active acromegaly had an expanded plasma volume (n = 12; 50.1 vs 37.6 ml.kg-1 BW) and an increased blood concentration of growth hormone (n = 23; 22.5 vs 2.1 ng.ml-1). Plasma ANF concentrations in active and inactive acromegalic patients (33.2 and 26.6 pg.ml-1, respectively) did not differ significantly from one another or from the level in the controls (26.9 pg.ml-1). In those patients there was no correlation between plasma volume and ANF level. Infusion of 21 isotonic saline in 2 h led to a similar, significant increase in ANF levels in active (from 26.2 to 72.4 pg.ml-1) and in inactive acromegalic patients (from 33.6 to 96.7 pg.ml-1) as well as in healthy subjects (from 21 to 70.6 pg.ml-1). Successful treatment reduced the plasma volume (from 49.2 to 35.8 ml.kg-1 BW) and growth hormone level (from 10.1 to 2.6 pg.ml-1), while the ANF level remained unchanged (from 33.8 to 35.5 pg.ml-1).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- G Deray
- Department of Nephrology, Hopital Pitie-Salpetriere, Paris, France
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29
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Deray G, Berlin I, Maistre G, Martinez F, Legrand S, Carayon A, Prost A, Puech A, Masson F, Legrand JC. Beta-adrenoceptor blockade potentiates exercise-induced release of atrial natriuretic peptide. Eur J Clin Pharmacol 1990; 38:363-6. [PMID: 1971599 DOI: 10.1007/bf00315576] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effect of a non selective and a cardio-selective beta-blocker on basal and exercise-stimulated plasma atrial natriuretic peptide concentrations in healthy volunteers has been studied. Nine healthy volunteers received single oral doses of 5 mg tertatolol, 100 mg atenolol or placebo, at one week intervals, in a double blind cross over trial. At rest plasma atrial natriuretic peptide, aldosterone, antidiuretic hormone and cyclic GMP concentrations and plasma renin activity were not modified by the treatments. During exercise plasma atrial natriuretic peptide concentrations were significantly increased by each treatment, the increment being significantly greater on beta-blockers than on placebo. The rise in atrial natriuretic peptide was 72% after placebo (from 24 to 42 pg/ml), 184% after atenolol (from 30 to 86 pg/ml), and 183% after tertatolol (from 34 to 95 pg/ml), respectively. Thus, the study has shown that in healthy subjects the plasma natriuretic peptide concentration is increased by exercise and that the increase is considerably and equally potentiated by selective and non selective beta-adrenoceptor blockade. The effect may be mainly due to a reduction in ventricular contractility with an increase in atrial pressure. The beta-blockers did not influence the resting plasma atrial natriuretic peptide levels, which suggests that in healthy subjects basal atrial natriuretic peptide secretion is not controlled via beta-receptors.
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Affiliation(s)
- G Deray
- Department of Nephrology, Hôpital Pitie-Salpetriere, Paris, France
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30
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Deray G, Maistre G, Desruenne M, Eurin J, Barthelemy C, Masson F, Baumelou A, Leger P, Cabrol C, Legrand JC. Atrial natriuretic peptide level and intracardiac pressure in cardiac transplant recipients. Eur J Clin Pharmacol 1990; 38:219-21. [PMID: 2140324 DOI: 10.1007/bf00315019] [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: 12/30/2022]
Abstract
Blood pressures and plasma atrial natriuretic peptide (ANP) concentrations have been measured in venous and intracardiac sites in 11 patients (10 men and 1 woman) given cardiac transplants. The mean plasma ANP level was 214.4 pg.ml-1 in the superior vena cava and 281 pg.ml-1 in the right atrium. This significantly higher level was maintained in the right ventricle (269) and in the pulmonary artery (295). The level in controls was 25 pg.ml-1. Intra cardiac and mean arterial pressures were in normal range in all patients, and there was no correlation between plasma ANP level and intracardiac pressure. The data suggest that in cardiac transplant patients right atrial pressure does not have a primary role in releasing ANP. The transplanted heart is denervated and remains so for many months after operation, thus suggesting that innervation is not obligatory for ANP secretion. Further studies are required to determine the relative contribution of donor and recipient atrial tissues to ANP secretion.
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Affiliation(s)
- G Deray
- Department of Nephrology, Hopital Pitie-Salpeteriere, Paris, France
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31
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Abstract
After several years of insulin therapy, about 20% of insulin-dependent diabetics have little or no perception of hypoglycaemia because of a loss of the adrenergic warning symptoms. This defect, poorly correlated with the presence of autonomic neuropathy, has been classically explained by a defect in the catecholamine secretion. We compared the hormonal counterregulation during hypoglycaemia induced by subcutaneous injection of insulin in 7 insulin-dependent diabetics with poor perception of hypoglycaemia and experiencing repeated episodes of severe hypoglycaemia (group A) and 7 insulin-treated diabetics with very good perception of hypoglycaemia and not experiencing severe hypoglycaemia (group B). Groups A and B were similar in terms of age, duration of diabetes, HbA1c level and degenerative complications. The glucagon levels were identical and non-reactive in the two groups. The basal levels and secretion peaks of adrenaline, noradrenaline, growth hormone and cortisol were similar between the two groups, but there was a significant delay in secretion in group A with a blood glucose threshold of adrenergic secretion of between 3.1 +/- 0.5 and 1.6 +/- 0.2 mmoles/l in group A and between 4.6 +/- 0.3 and 3.2 +/- 0.2 mmoles/l in group B (P less than 0.05). This delayed secretion could be explained by desensitisation of the hypothalamic glucostat and could be due to the frequency and/or severity of hypoglycaemic episodes.
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Affiliation(s)
- A Grimaldi
- Service Diabétologie, C. H. U. Pitie-Salpetriere, Paris, France
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32
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Deray G, Maistre G, Le Hoang P, Eurin J, Baumelou B, Masson F, Barthelemy C, Legrand JC, Jacobs C. Effect of cyclosporine on atrial natriuretic factor in patients with uveitis. N Engl J Med 1990; 322:336. [PMID: 2136933 DOI: 10.1056/nejm199002013220516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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33
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Prost AC, Anakök M, Aurengo A, Salomon JC, Legrand JC, Rosselin G. Tissue distribution of 131I radiolabeled transferrin in the athymic nude mouse: localization of a human colon adenocarcinoma HT-29 xenograft. Int J Rad Appl Instrum B 1990; 17:209-16. [PMID: 2341276 DOI: 10.1016/0883-2897(90)90149-u] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The tissue distribution of 131I-transferrin (131I-Tf) was studied in athymic nude mice having s.c. human colonic adenocarcinoma HT-29 xenografts. Four days after 131I-Tf injection, the 131I-specific activity measured in the HT-29 tumor, i.e. amount of radioactivity per gram of fresh tissue, represented 0.31 +/- 0.09% of the injected radioactivity and was 1.90 fold more than that measured in the murine colon (P less than 0.05). After correction for intravascular 131I-Tf as estimated by means of 99mTc-Sn in vivo labeling of red blood cells, the 131I specific activity observed in the HT-29 tumor was 7.21 fold more than that observed in the murine colon. This subtracting method enabled us to localize a HT-29 tumor xenograft by gamma scintigraphy of the entire animal and demonstrated that 131I-Tf could be a non-specific but potent marker for human colon cancer.
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Affiliation(s)
- A C Prost
- Service de Biophysique, C.H.U. La Pitié-Salpêtrière, Paris, France
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34
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Deray G, Maistre G, Cacoub P, Barthelemy C, Eurin J, Carayon A, Masson F, Martinez F, Baumelou A, Legrand JC. Renal and hemodialysis clearances of endogenous natriuretic peptide. A clinical and experimental study. Nephron Clin Pract 1990; 54:148-53. [PMID: 2138254 DOI: 10.1159/000185836] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The purpose of the present study was to assess the plasma levels of atrial natriuretic peptide (ANP) in chronically uremic patients not submitted to dialysis and to determine the predialysis plasma concentration of ANP, the effect of ultrafiltration on plasma levels of ANP (hemodialysis, (HD), and the HD clearance of ANP in a population of adult patients treated with maintenance HD. The mean plasma ANP concentration (pg/ml) in HD was 370.2 +/- 35.5 pg/ml (mean +/- SEM) before HD and decreased to 165.3 +/- 15.2 after HD (p less than 0.01). Both values were significantly higher than in controls (28 +/- 2; n = 39). The changes in plasma ANP levels correlated inversely with those in plasma protein concentration (r = -0.53; p less than 0.03; y = 48.6 +/- 0.8 x). ANP clearance across the cuprophan membrane averaged 13 +/- 6.4 ml/mn. Resting plasma ANP values in the 16 uremic patients ranged between 16 and 277 pg/ml (124 +/- 11 pg/ml). These levels were significantly higher than those observed in controls (p less than 0.01). In these patients there was a highly significant correlation between serum creatinine and plasma ANP concentrations (p less than 0.01; r = 0.75; y = 0.2x + 3). Furthermore we report the results of the determination of the renal clearance of ANP in normal dogs. In all dogs a fall in plasma ANP concentration was recorded between the aorta (28.6 +/- 4.5 pg/ml) and the renal vein (14.2 +/- 2.7 pg/ml). The renal extraction ratio averaged 51.3 +/- 3.7%. Mean ANP renal clearance was 38.2 +/- 5.2 ml/mn.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- G Deray
- Department of Nephrology, Groupe Hospitalier Pitié-Salpétrière, Paris, France
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35
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Deray G, Baumelou B, Le Hoang P, Aupetit B, Girard B, Baumelou A, Legrand JC, Jacobs C. Enhancement of cyclosporin nephrotoxicity by diuretic therapy. Clin Nephrol 1989; 32:47. [PMID: 2758701] [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: 01/02/2023] Open
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36
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Legrand JC, Aupetit B. [An assay for aldosterone precursors: a tool for clinical diagnosis and adrenal physiopathology]. Bull Acad Natl Med 1989; 173:735-9; discussion 739-41. [PMID: 2598071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
After their contribution to the study of 18 hydroxycorticosterone as an intermediate in aldosterone biosynthesis the authors present here a new series of assays for the measurement of plasma aldosterone precursors as a pertinent tool in the extensive study and clinical evaluation of the mineralocorticoid function of the adrenal. These radioimmunoassays must be undertaken under strict technical conditions: time of blood withdrawal and also posture. Their use is irrelevant in any other clinical feature but the salt loss syndrome and hyper mineralo-corticism together with or without high plasma aldosterone.
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37
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Legrand JC, Alewaeters A, Leenaerts L, Gilbert P, Labbe M, Glupczynski Y. Gardnerella vaginalis bacteremia from pulmonary abscess in a male alcohol abuser. J Clin Microbiol 1989; 27:1132-4. [PMID: 2787333 PMCID: PMC267503 DOI: 10.1128/jcm.27.5.1132-1134.1989] [Citation(s) in RCA: 31] [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: 01/02/2023] Open
Abstract
A case of Gardnerella vaginalis bacteremia is reported. This bacteremia occurred in a male alcohol abuser who developed definite signs of pulmonary abscess and empyema. Streptococcus milleri grew from another blood culture, but Gardnerella vaginalis was also isolated from a bronchoscopic aspirate and pleural drainage sample as part of mixed flora containing anaerobes, Streptococcus species, Neisseria sicca, and a Haemophilus sp. We discuss the possible pathogenic character of G. vaginalis outside the genital tract from a review of the literature.
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Affiliation(s)
- J C Legrand
- Département d'Hématologie-Oncologie, Hôpital Civil de Charleroi, Belgium
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38
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Joubert D, Benlot C, Lagoguey A, Garnier P, Brandi AM, Gautron JP, Legrand JC, Peillon F. Normal and growth hormone (GH)-secreting adenomatous human pituitaries release somatostatin and GH-releasing hormone. J Clin Endocrinol Metab 1989; 68:572-7. [PMID: 2493037 DOI: 10.1210/jcem-68-3-572] [Citation(s) in RCA: 41] [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: 01/01/2023]
Abstract
Neuropeptides such as vasoactive intestinal peptide, LHRH, or TRH have been found in rat pituitary tissue and could act via paracrine or autocrine actions in this tissue. In this study we investigated whether normal human pituitary tissue and GH-secreting human pituitary adenomas could release somatostatin (SRIH) and GHRH. Fragments from three human pituitaries and dispersed cells from six GH-secreting adenomas (four adenomas were studied for GHRH release and five for SRIH release) were perifused using a Krebs-Ringer culture medium, and the perifusion medium was collected every 2 min (1 mL/fraction for 5 h). GH, GHRH, and SRIH were measured by RIA under basal conditions and in the presence of 10(-6) mol/L TRH or SRIH. Both normal pituitaries and GH-secreting pituitary adenomas released SRIH and GHRH. SRIH release commenced 90-180 min after initiation of the perifusion, at which time GH secretion had decreased significantly. TRH stimulated SRIH release from normal pituitary tissue and inhibited SRIH release from adenoma tissue. GHRH was present at the start of the perifusion, but rapidly disappeared. However, SRIH stimulated GHRH release from normal pituitary tissue, but not from adenoma tissue. Significant amounts of GHRH and SRIH were released during the experiments, suggesting their local synthesis. These results indicate that pituitary cells can release hypothalamic peptides. The liberation of these neuropeptides is regulated, and moreover, their regulation differs between normal and adenomatous pituitaries.
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Affiliation(s)
- D Joubert
- INSERM U.223, Faculté de Médecine Pitié-Salpétrière, Paris, France
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39
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40
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Aupetit B, Ghazi A, Blanchouin N, Toury R, Shechter E, Legrand JC. Impact on energy metabolism of quantitative and functional cyclosporine-induced damage of kidney mitochondria. Biochim Biophys Acta 1988; 936:325-31. [PMID: 2848579 DOI: 10.1016/0005-2728(88)90008-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this study we have measured, under experimental conditions which maintained efficient coupling, respiratory intensity, respiratory control, oxidative phosphorylation capacity and protonmotive force. Succinate cytochrome-c reductase and cytochrome-c oxidase activities were also studied. These investigations were carried out using kidney mitochondria from cyclosporine-treated rats (in vivo studies) and from untreated rats in the presence of cyclosporine (in vitro studies). Inhibition of respiratory intensity by cyclosporine did not exceed 21.1% in vitro and 15.9% in vivo. Since there was no in vitro inhibition of succinate cytochrome-c reductase and cytochrome-c oxidase activities, the slowing of electron flow observed can be interpreted as a consequence of an effect produced by cyclosporine between cytochromes b and c1. Cyclosporine had no effect on respiratory control either in vitro or in vivo. Statistically significant inhibition of the oxidative phosphorylation was observed both in vitro (6.6%) and in vivo (12.1%). Moreover, cyclosporine did not induce any change of membrane potential either in vivo or in vitro. Our findings show that cyclosporine is neither a protonophore, nor a potassium ionophore. In cyclosporine-treated rats we notices a decrease of protein in subcellular fraction, including the mitochondrial fraction. The role of the inhibition respiratory characteristics by cyclosporine in nephrotoxicity in vivo must take account of these two parameters: inhibition of the respiratory characteristics measured in vitro and diminution of mitochondrial protein in cyclosporine-treated rats.
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Affiliation(s)
- B Aupetit
- Service de Biochimie Médicale, Faculté de Médecine Pitié-Salpétrière, Paris, France
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41
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Taquet H, Javoy-Agid F, Mauborgne A, Benoliel JJ, Agid Y, Legrand JC, Tramu G, Cesselin F, Hamon M. Biochemical mapping of cholecystokinin-, substance P-, [Met]enkephalin-, [Leu]enkephalin- and dynorphin A (1-8)-like immunoreactivities in the human cerebral cortex. Neuroscience 1988; 27:871-83. [PMID: 2472575 DOI: 10.1016/0306-4522(88)90190-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [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: 01/01/2023]
Abstract
The distribution of immunoreactive cholecystokinin, substance P, [Met]enkephalin, [Leu]-enkephalin and dynorphin was determined in the cerebral cortex of the human brain post mortem. Peptide radioimmunoassays in three selected zones of the cortical gray mantle (frontal, temporal, occipital) revealed significant regional differences, prompting to the development of a new dissection procedure for the complete mapping of peptide-like materials throughout the entire cerebral cortex. For this purpose, frozen cerebral hemispheres were cut rostrocaudally in 21 verticofrontal serial sections, from which the cortical gray matter was divided into 4-5 distinct zones. The peptides could be measured in each of the 93 dissected pieces of tissue, but their distribution was uneven. The most abundant was cholecystokinin, particularly in the anterior part of the frontal lobe and in the temporal cortex, where its levels reached 0.5 ng/mg of tissue. The regional distribution of cholecystokinin resembled that of substance P with a decreasing gradient from the frontal to the occipital pole, but absolute levels of substance P were hardly one tenth of cholecystokinin levels. The mean concentrations of the three opioid peptides were even less than those of substance P, and their regional distributions were markedly different. [Met]Enkephalin was concentrated in the occipital cortex, and [Leu]enkephalin in the temporal cortex. Dynorphin was the least abundant, even in the temporal cortex where the highest levels were found. The widespread and heterogeneous distribution of these peptides strongly suggests that each of them exerts specific functions in the human cerebral cortex.
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Affiliation(s)
- H Taquet
- INSERM U. 288, Faculté de Médecine Pitié-Salpêtrière, Paris, France
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42
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Taquet H, Nomoto M, Rose S, Jenner P, Javoy-Agid F, Mauborgne A, Benoliel JJ, Marsden CD, Legrand JC, Agid Y. Levels of Met-enkephalin, Leu-enkephalin, substance P and cholecystokinin in the brain of the common marmoset following long term 1-methyl-4-phenyl-1,2,3,6,-tetrahydropyridine treatment. Neuropeptides 1988; 12:105-10. [PMID: 2468106 DOI: 10.1016/0143-4179(88)90039-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [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: 01/01/2023]
Abstract
Common marmosets were treated daily with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP, 7-9 mg/kg i.p.) for 25 days, and then kept out of drug for three months before biochemical measurements in various brain areas. This treatment induced a dramatic fall (-80%) in dopamine, homovanillic acid and dihydroxyphenylacetic acid levels in the putamen and caudate nucleus, and a significant but less pronounced reduction (less than or equal to 50%) in the levels of these compounds in the nucleus accumbens. In contrast, the concentrations of four neuropeptides: met-enkephalin, leu-enkephalin, substance P, and cholecystokinin, remained unaltered in all brain areas examined in MPTP-treated marmosets. Therefore the neuropeptide alterations previously reported in Parkinson's disease are probably not secondary to the severe lesion of dopaminergic neurones, but constitute another intrinsic feature of the disease.
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Affiliation(s)
- H Taquet
- INSERM U.288, Faculté de Médecine Pitié-Salpêtrière, Paris, France
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43
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Deray G, Maistre G, Basset JY, Cacoub P, Carayon A, Anouar M, Baumelou A, Legrand JC, Ancri D, Jacobs C. Plasma levels of atrial natriuretic peptide in chronically dialyzed patients. Kidney Int Suppl 1988; 25:S86-8. [PMID: 2972869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- G Deray
- Department of Nephrology, Groupe Hospitalier Pitie-Salpetriere, Paris, France
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44
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Komajda M, Carayon A, Nguyen JP, Maistre G, Drobinski G, Legrand S, Landault C, Legrand JC, Grosgogeat Y. [Atrial natriuretic factor, catecholamines and the renin-angiotensin system in cardiac insufficiency. Relation to hemodynamic parameters]. Arch Mal Coeur Vaiss 1988; 81:845-53. [PMID: 2973293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Plasma concentrations of atrial natriuretic factor (ANF), catecholamines (adrenaline, noradrenaline, dopamine) and aldosterone, and plasma renin activity (PRA) were measured in a group of 20 patients with moderate to medium heart failure (NYHA class II 7 patients, class III 13 patients), 24 hours after treatment was discontinued. Compared with a control group, plasma concentrations of ANF (p less than 0.01), noradrenaline (p less than 0.05), aldosterone (p less than 0.01) and PRA (p less than 0.01) were significantly increased. There was a significant difference between class II patients and class III patients in plasma ANF (p less than 0.01) and noradrenaline (p less than 0.02) concentrations, but not in PRA and aldosterone levels. A significant correlation was observed between plasma ANF concentration and left ventricular end-diastolic pressure (r = 0.68, p less than 0.001), pulmonary arterial pressure (r = 0.59, p less than 0.01), pulmonary capillary pressure (r = 0.51, p less than 0.02), cardiac index (r = 0.46, p less than 0.05) and left ventricular end-diastolic volume (r = 0.50, p less than 0.05). However, ANF concentration was not correlated with mean right atrial pressure. Plasma adrenaline concentration correlated with systemic arterial resistance (r = 0.80, p less than 0.001), pulmonary arterial pressure (r = 0.57, p less than 0.02), mean pulmonary capillary pressure (r = 0.62, p less than 0.001), cardiac index (r = 0.53, p less than 0.05) and left ventricular end-diastolic pressure (r = 0.58, p less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Komajda
- Service de cardiologie, CHU Pitié-Salpêtrière, Paris
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45
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Zenatti M, Aupetit B, Ghazzi A, Shechter E, Michel A, Nataf V, Aymard P, Legrand JC. Is the inhibition of oxidative phosphorylation chains in kidney mitochondria responsible for cyclosporine nephrotoxicity? Transplant Proc 1988; 20:700-4. [PMID: 3388507] [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: 01/05/2023]
Affiliation(s)
- M Zenatti
- Service de Biochimie Médicale, Faculté de Médecine Pitié-Salpétrière, Paris
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46
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Berlin I, Grimaldi A, Landault C, Zoghbi F, Thervet F, Puech AJ, Legrand JC. Lack of hypoglycemic symptoms and decreased beta-adrenergic sensitivity in insulin-dependent diabetic patients. J Clin Endocrinol Metab 1988; 66:273-8. [PMID: 2828405 DOI: 10.1210/jcem-66-2-273] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Plasma epinephrine, norepinephrine, and dopamine responses were studied in insulin-dependent diabetic patients at rest, on standing and during insulin-induced hypoglycemia. beta-Adrenergic sensitivity was evaluated by the isoproterenol sensitivity test. Five men who had adrenergic symptoms during hypoglycemia and no severe hypoglycemic accidents (coma, seizures) (group A) and five men who had repeated severe hypoglycemic accidents but lack of adrenergic symptoms of hypoglycemia (group B) were studied. The mean resting plasma epinephrine was lower in group B (147 +/- 22 pmol/L, SEM) than in group A (398 +/- 98 pmol/L, P less than 0.02). On standing plasma epinephrine increased significantly in both groups. During hypoglycemia blood glucose decreased identically in the two groups; plasma epinephrine and norepinephrine increased significantly and to the same extent in both groups; the mean maximal heart rate was significantly greater in group A than in group B. Isoproterenol sensitivity (defined as the dose of isoproterenol required to increase heart rate by 25 beats/min) was lower in group B (5.87 +/- 1.12 micrograms) than in group A (2.37 +/- 0.22 micrograms, P less than 0.01). The group B patients had significantly fewer hypoglycemic symptoms during insulin-induced hypoglycemia than did group A patients. We conclude that decreased beta-adrenergic sensitivity contributes to the lack of adrenergic symptoms of hypoglycemia in insulin-dependent diabetic patients.
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Affiliation(s)
- I Berlin
- Department of Clinical Pharmacology, Hôpital Pitié-Salpêtrière, Paris, France
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47
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Deray G, Maistre G, Eurin J, Martinez F, Barthelemy C, Legrand JC, Baumelou A, Jacobs C. Plasma levels of atrial natriuretic factor in inappropriate secretion of antidiuretic hormone syndrome. Am J Nephrol 1988; 8:510-1. [PMID: 2975467 DOI: 10.1159/000167671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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48
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Kains JP, Dereume JP, Jacobs F, Legrand JC, Wautrecht JC, Thys JP. Salmonella endarteritis, about two cases and their management. J Cardiovasc Surg (Torino) 1987; 28:538-41. [PMID: 3308899] [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: 01/05/2023]
Abstract
Mycotic aneurysms due to Salmonella are a classical but uncommon complication of Salmonella infections. We report two cases of such aneurysms, the first one having developed two successive aneurysms of the iliac arteries due to Salmonella typhimurium. The literature on Salmonella endarteritis is briefly reviewed. The importance of an aggressive surgical approach of the mycotic aneurysm, with removal of all infected material and extra-anatomic bypass through contaminated tissue is emphasized. The role of antibiotic treatment is also discussed.
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Affiliation(s)
- J P Kains
- Department of Internal Medicine, CUB Hospital Erasme, Brussels, Belgium
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49
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Legrand JC, Van der Auwera P, Bailly A, Daubresse JC, Renaux J, Wastiaux F. Circulating inhibitor of factor VIII during treatment with teicoplanin and rifampicin. J Antimicrob Chemother 1987; 19:850-2. [PMID: 2956232 DOI: 10.1093/jac/19.6.850] [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: 01/03/2023] Open
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50
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Taquet H, Javoy-Agid F, Mauborgne A, Benoliel JJ, Agid Y, Legrand JC, Hamon M, Cesselin F. Brain neuropeptides in progressive supranuclear palsy. Brain Res 1987; 411:178-82. [PMID: 2440513 DOI: 10.1016/0006-8993(87)90697-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
No significant alterations in the levels of Met-enkephalin-, Leu-enkephalin-, cholecystokinin- and substance P-like immunoreactive materials were found in 10 areas of postmortem brains from patients with progressive supranuclear palsy (PSP) when compared to controls. These results are at difference with the marked decrease in the levels of enkephalin-, cholecystokinin- and substance P-like immunoreactive materials previously reported in the basal ganglia of parkinsonian patients. Since PSP and Parkinson's disease are both characterized by a severe dopamine nigrostriatal deficit, these results suggest that the decreased brain peptide concentrations found in Parkinson's disease do not simply result from a dopaminergic neuronal loss.
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