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Lachuer C, Benzengli H, Do B, Rwabihama JP, Leglise P. Oral anticoagulants: Interventional pharmaceutical study with reminder of good practices, and iatrogenic impact. Ann Pharm Fr 2021; 79:409-417. [PMID: 33516717 DOI: 10.1016/j.pharma.2021.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 12/04/2020] [Accepted: 01/06/2021] [Indexed: 10/22/2022]
Abstract
OBJECTIVES Study of the impact of geriatricians' training on the improvement of their prescribing practices, and comparison of iatrogenesis between the two classes of oral anticoagulants. MATERIAL AND METHODS Before/after and here/there comparison between a trained prescribers group and a control group, before and after the pharmacist intervention, with comparison of the iatrogenesis of two oral anticoagulant classes. Patients in the acute and post-acute geriatric departments treated with a vitamin K antagonist or a direct oral anticoagulant were included. Criteria for Good practice were rated according to a scale of severity: calculation of a score and a percentage of compliance per patient, and then an average of the percentage of compliance (main criterion) within the populations to be compared. The proportion of iatrogenic elements between the two classes was compared. We used statistical tests (significance threshold of 5%). RESULTS Vitamin K antagonist: a decreasing trend in the control group (P=0.086) and an increasing trend in the trained group (P=0.183) was observed in prescription compliance before/after training. Direct oral anticoagulants: the compliance before/after decreased in the control group (P=0.005) and increased in the trained group (P=0.024). After training, compliance is higher among the group of trained prescribers for both vitamin K antagonist (P=0.018) and direct oral anticoagulant (P=0.003). The proportion of iatrogenic events in the two oral anticoagulants classes was not significantly different. CONCLUSIONS Interest of good practice reminders in the quality of oral anticoagulants prescriptions with no difference in safety of use between the two classes.
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Affiliation(s)
- C Lachuer
- Pharmacy, Hôpital Joffre-Dupuytren, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, 1, rue Eugène Delacroix, 91210 Draveil, France.
| | - H Benzengli
- Pharmacy, Hôpital Joffre-Dupuytren, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, 1, rue Eugène Delacroix, 91210 Draveil, France.
| | - B Do
- Pharmacy, Hôpital Henri Mondor, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, 51, Avenue du Maréchal de Lattre de Tassigny, 94010 Créteil, France.
| | - J-P Rwabihama
- Geriatric Department, Hôpital Joffre-Dupuytren, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, 1, rue Eugène Delacroix, 91210 Draveil, France.
| | - P Leglise
- Pharmacy, Hôpital Joffre-Dupuytren, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, 1, rue Eugène Delacroix, 91210 Draveil, France.
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Le Guyader G, Vieillard V, Mouraud S, Do B, Marabelle A, Paul M. Stability of nivolumab in its original vials after opening and handing in normal saline bag for intravenous infusion. Eur J Cancer 2020; 135:192-202. [DOI: 10.1016/j.ejca.2020.04.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/21/2020] [Accepted: 04/28/2020] [Indexed: 01/03/2023]
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Macquart De Terline D, Zabsonre P, Balde D, Ikama S, N Guetta R, Tchabi Y, Sidi Aly A, Damourou JMF, Takombe JL, Bernard M, Do B, Diop BI, Jouven X, Antignac M, Ali Toure I. P5712Research Network in Africa (RNA): quality assessment of antihypertensive generic drugs in 10 African countries. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Hypertension results in more deaths than any other risk factor and has been on the rise in Sub-Saharan Africa over the past few decades. Generic drugs have helped improve accessibility and affordability of antihypertensive therapy in developing countries. However, assessment of quality standards of these products is important.
Purpose
We performed a quality assessment of five commonly used antihypertensive generic drugs in ten Sub-Saharan African countries and studied the impact of price on quality.
Methods
Drug samples were prospectively collected using standardized methods between 2012 and 2014. We developed a validated reversed-phase liquid chromatography with tandem mass spectrometry method to accurately quantify the active ingredient in a certified public laboratory. Quality was defined based on the percentage ratio of measured to expected dosage of active ingredient.
Results
A total of 1185 samples were assessed, of which 70.0% were generic (n=830). Among the generic drugs, the percentage of poor quality drugs was 24.3% (n=202/830). The percentage ratio of measured to expected dosage of active ingredient ranged from 49.2% to 111.3%; the majority (81.7%) of the poor quality samples had insufficient quantity of the active ingredient. Moreover, poor quality was not associated with purchase price of the drug.
Conclusion
In this study from ten Sub-Saharan African countries, nearly one-quarter of the available generic antihypertensive drugs were found to be of poor quality. Concerted measures to improve the quality of antihypertensive drugs could lead to major improvements in hypertension control with attendant reduction of its deleterious consequences in low and middle income countries.
Figure 1. Percentage of poor quality in generic antihypertensive drugs according to the country of purchase.
Acknowledgement/Funding
Grant AAP-2014-042, ANSM (Agence Nationale Sécurité du Médicament
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Affiliation(s)
| | - P Zabsonre
- National Sanou Souro de Bobo-Dioulasso hospital, Cardiology department, ouagadougou, Burkina Faso
| | - D Balde
- University Hospital of Conakry, Department of Cardiology, Conakry, Guinea
| | - S Ikama
- University Hospital, Cardiology Department, Brazzaville, Congo
| | - R N Guetta
- Abidjan Institute of Cardiology, Abidjan, Côte d'Ivoire
| | - Y Tchabi
- National University hospital of Cotonou, Cotonou, Benin
| | - A Sidi Aly
- Cardiology clinics, Nouakchott, Mauritania
| | | | - J L Takombe
- General Hospital of Kinshasa, Kinshasa, Congo
| | - M Bernard
- Faculty of Pharmacy, Paris Sud University, UA 401 Matériaux et Santé, Paris, France
| | - B Do
- Faculty of Pharmacy, Paris Sud University, UA 401 Matériaux et Santé, Paris, France
| | - B I Diop
- University Hospital of Fann Dakar, Cardiology Department, Dakar, Senegal
| | - X Jouven
- Paris Cardiovascular Research Center (PARCC), Paris, France
| | - M Antignac
- Hospital Saint-Antoine, Pharmacy Department, Paris, France
| | - I Ali Toure
- University hospital of LAMORDE, Cardiology Department, Niamey, Niger
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Griffiths AJ, Diamond EL, Alsip J, Furlong M, Morrison G, Do B. School-wide implementation of positive behavioral interventions and supports in an alternative school setting: A case study. J Community Psychol 2019; 47:1493-1513. [PMID: 31212369 DOI: 10.1002/jcop.22203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 03/21/2019] [Accepted: 04/27/2019] [Indexed: 06/09/2023]
Abstract
AIMS The purpose of this 1-year case study was to identify how School-Wide Positive Behavioral Interventions and Supports (SW-PBIS) can be adapted to meet the needs of students in alternative schools and to evaluate the early impact of SW-PBIS on discipline outcomes. METHODS Suggestions for adaptations are provided at each stage of the intervention process with a focus on buy-in, training, data collection, and resource allocation. RESULTS Data from this case study included information about key components of the implementation process as well as initial outcomes. Process data revealed the importance of stakeholder buy-in, training opportunities, and potential adaptations to the framework. Outcome data from the first year of implementation indicated that the number of incident reports did not significantly differ from the baseline; however, there was a reduction in defiance-related behaviors and an increase in on-task behaviors. CONCLUSION This study contributes to the determination of the efficacy of SW-PBIS in a historically more punitive environment. Given the initial positive response and lessons learned, it is believed that, with the support of additional Tier 2 and Tier 3 interventions, SW-PBIS may be an appropriate framework to support students in alternative schools.
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Affiliation(s)
- Amy-Jane Griffiths
- Attallah College of Educational Studies, Chapman University, Orange, California
| | - Elena Lilles Diamond
- Department of Counseling and School Psychology, Lewis and Clark College College of Arts and Sciences, Portland, Oregon
| | - James Alsip
- Attallah College of Educational Studies, Chapman University, Orange, California
| | - Michael Furlong
- Department of Counseling, Clinical, and School Psychology, International Center for School-Based Youth Development, University of California Santa Barbara, Santa Barbara, California
| | - Gale Morrison
- Department of Counseling, Clinical, and School Psychology, University of California Santa Barbara, Santa Barbara, California
| | - Bich Do
- Attallah College of Educational Studies, Chapman University, Orange, California
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Secrétan PH, Karoui M, Sadou Yayé H, Levi Y, Tortolano L, Solgadi A, Yagoubi N, Do B. Imatinib: Major photocatalytic degradation pathways in aqueous media and the relative toxicity of its transformation products. Sci Total Environ 2019; 655:547-556. [PMID: 30476834 DOI: 10.1016/j.scitotenv.2018.11.270] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 11/13/2018] [Accepted: 11/18/2018] [Indexed: 06/09/2023]
Abstract
Imatinib (IMA) is a highly potent tyrosine kinase inhibitor used as first-line anti-cancer drug in the treatment of chronic myeloid leukemia. Due to its universal mechanism of action, IMA also has endocrine and mutagenic disrupting effects in vivo and in vitro, which raises the question of its environmental impact. However, to date, very little information is available on its environmental fate and the potential role of its transformation products (TPs) on aquatic organisms. Given the IMA resistance to hydrolysis and direct photolysis according to the literature, we sought to generate TPs through oxidative and radical conditions using the AOPs pathway. Thus, the reactivity of the cytotoxic drug IMA in water in the presence of OH and h+ was investigated for the first time in the present work. In this regard, a non-targeted screening approach was applied in order to reveal its potential TPs. The tentative structural elucidation of the detected TPs was performed by LC-HRMSn. The proposed approach allowed detecting a total of twelve TPs, among which eleven are being described for the first time in this work. Although the structures of these TPs could not be positively confirmed due to lack of standards, their chemical formulas and product ions can be added to databases, which will allow their screening in future monitoring studies. Using the quantitative structure-activity relationship (QSAR) approach and rule-based software, we have shown that the detected TPs possess, like their parent molecule, comparable acute toxicity as well as mutagenic and estrogenic potential. In addition to the in silico studies, we also found that the samples obtained at different exposure times to oxidative conditions, including those where IMA is no longer detected, retained toxicity in vitro. Such results suggest further studies are needed to increase our knowledge of the impact of imatinib on the environment.
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Affiliation(s)
- P H Secrétan
- University of Paris-Sud, Department of Pharmacy, Laboratory "Matériaux et Santé" EA 401, 5 rue Jean Baptiste Clément, 92296 Châtenay-Malabry, France; Assistance Publique-Hôpitaux de Paris, Hôpital Necker, Department of Pharmacy, 149 Rue de Sèvres, 75015 Paris, France.
| | - M Karoui
- University of Paris-Sud, Department of Pharmacy, Laboratory "Matériaux et Santé" EA 401, 5 rue Jean Baptiste Clément, 92296 Châtenay-Malabry, France
| | - H Sadou Yayé
- University of Paris-Sud, Department of Pharmacy, Laboratory "Matériaux et Santé" EA 401, 5 rue Jean Baptiste Clément, 92296 Châtenay-Malabry, France; Assistance Publique-Hôpitaux de Paris, Groupe Pitié-Salpétrière, Department of Pharmacy, 47-83 Boulevard de l'Hôpital, 75013, Paris
| | - Y Levi
- University of Paris-Sud, Faculté de Pharmacie, UMR 8079, CNRS, AgroParisTech, Paris, France
| | - L Tortolano
- University of Paris-Sud, Department of Pharmacy, Laboratory "Matériaux et Santé" EA 401, 5 rue Jean Baptiste Clément, 92296 Châtenay-Malabry, France; Assistance Publique-Hôpitaux de Paris, Groupe hospitalier Henri Mondor, Department of Pharmacy, 51 Avenue du Maréchal de Lattre de Tassigny, 94010 Créteil, France
| | - A Solgadi
- University of Paris-Sud, Faculté de Pharmacie, Service d'Analyse des Médicaments et Métabolites, Institut d'Innovation Thérapeutique, 5 rue Jean Baptiste Clément, 92296 Chatenay-Malabry, France
| | - N Yagoubi
- University of Paris-Sud, Department of Pharmacy, Laboratory "Matériaux et Santé" EA 401, 5 rue Jean Baptiste Clément, 92296 Châtenay-Malabry, France
| | - B Do
- University of Paris-Sud, Department of Pharmacy, Laboratory "Matériaux et Santé" EA 401, 5 rue Jean Baptiste Clément, 92296 Châtenay-Malabry, France; Assistance Publique-Hôpitaux de Paris, Groupe hospitalier Henri Mondor, Department of Pharmacy, 51 Avenue du Maréchal de Lattre de Tassigny, 94010 Créteil, France
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Bardo-Brouard P, Luizard C, Valeyrie-Allanore L, Goujon C, Do B, Colin A, Wolkenstein P, Paul M. High-concentration topical capsaicin in the management of refractory neuropathic pain in patients with neurofibromatosis type 1: a case series. Curr Med Res Opin 2018; 34:887-891. [PMID: 29368950 DOI: 10.1080/03007995.2018.1433142] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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] [Indexed: 10/18/2022]
Abstract
AIM The aim of this case series was to report the use of 8% topical capsaicin patch (marketed under the trade name Qutenza®) a in the management of refractory neuropathic pain (NP) in adult patients with type 1 neurofibromatosis (NF1). METHODS Capsaicin has been suggested for NF1 patients suffering from refractory peripheral NP despite several years of analgesic treatments. The patch was applied for 60 minutes on the painful area, with tolerability control (blood pressure, intensity of pain and dermal reaction). The evaluation was done at the beginning of treatment and during the 2 months following the first treatment (phone calls at weeks 1, 2, 4 and 8). The primary efficacy criterion was the response rate: a patient was considered to be responding if he or she reported an average relief ≥30% at the time of the follow-up calls. The secondary criteria were: interference scores (QCD), Patient Global Impression of Change (PGIC) and overall treatment satisfaction, self-reported by the patient. RESULTS Eight patients (5 females/3 males, 41.8 ± 8.2 years of age) received a first treatment with capsaicin. Patients had pre-existing pain for 6.6 years (±6.0) and were currently receiving an average of 6.1 (±3.9) different analgesics. The response rate was 37.5%. The three responders felt globally improved and satisfied, with the improvement in overall condition as interference scores decreased. Apart from the expected local reactions, the treatment was not accompanied by systemic side effects. CONCLUSIONS As suggested in this case series, capsaicin provided pain relief in certain NF1 patients with resistant NP. The response rate is that expected in multi-line refractory NP. A significant benefit on the overall condition of some patients was observed. In addition, this topical treatment is administered every 3 months without systemic effects. This study is limited by the small number of patients, but was intended to describe a new and well tolerated alternative treatment.
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Affiliation(s)
- P Bardo-Brouard
- a Pharmacy Department , Henri Mondor University Hospital , Créteil , France
| | - C Luizard
- a Pharmacy Department , Henri Mondor University Hospital , Créteil , France
| | - L Valeyrie-Allanore
- b Dermatology Department , Neurofibromatosis Reference Center, Henri Mondor University Hospital , Créteil , France
| | - C Goujon
- c Neurosurgery Department , Henri Mondor University Hospital , Créteil , France
| | - B Do
- a Pharmacy Department , Henri Mondor University Hospital , Créteil , France
- d Université Paris Sud, UFR de Pharmacie , Châtenay-Malabry , France
| | - A Colin
- b Dermatology Department , Neurofibromatosis Reference Center, Henri Mondor University Hospital , Créteil , France
| | - P Wolkenstein
- b Dermatology Department , Neurofibromatosis Reference Center, Henri Mondor University Hospital , Créteil , France
| | - M Paul
- a Pharmacy Department , Henri Mondor University Hospital , Créteil , France
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Antignac M, Diop B, Macquart DE Terline D, Do B, Ikama M, N'guetta R, Balde D, Tchabi Y, Sidi Aly A, Ali Toure I, Zabsonre P, Damorou J, Takombe J, Marijon E, Jouven X. PS075 Quality Assessment of 7 Cardiovascular Drugs in Sub-Saharan African Countries: Results of the Seven Study by Drug and Version of Drug. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Do L, Do B, Mansouri S, Do Thanh X. Day and Night Chronesthesy of 24,25 (OH)2D3, Copper (II) and [Cu(II)-24,25 (OH)2D3] Complex on Renal and Cerebral Enzymatic Activities in Male Hypophysectomized Rats. BIOL RHYTHM RES 2010. [DOI: 10.1076/brhm.30.1.1.3066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- L.A. Do
- a Pharmacology Laboratory, University, Angers, France
| | - B. Do
- a Pharmacology Laboratory, University, Angers, France
| | - S. Mansouri
- a Pharmacology Laboratory, University, Angers, France
| | - X. Do Thanh
- a Pharmacology Laboratory, University, Angers, France
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Park Y, Im S, Lee E, Do B, Moon J. G.P.16.13 Myogenic potential of human lipoaspirate cells. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.389] [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: 11/29/2022]
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Lee K, Do B, Kim S, Kim S. Retained embryos in the transfer catheter and their immediate retransfer have no adverse impact on pregnancy outcome. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.1105] [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: 11/26/2022]
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Raust JA, Goulay-Dufaÿ S, Le Hoang MD, Pradeau D, Guyon F, Do B. Stability studies of ionised and non-ionised 3,4-diaminopyridine: Hypothesis of degradation pathways and chemical structure of degradation products. J Pharm Biomed Anal 2007; 43:83-8. [PMID: 16844337 DOI: 10.1016/j.jpba.2006.06.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2006] [Revised: 06/01/2006] [Accepted: 06/07/2006] [Indexed: 11/24/2022]
Abstract
3,4-Diaminopyridine is used to treat some symptoms met in Lambert-Eaton myasthenia syndrome. It was shown efficient to reduce a form of variable muscle weakness and fatigability typical of the disease and correlated to a block of acetylcholine release. In France, 3,4-diaminopyridine is nowadays given to patients under capsules form and the status of hospital preparation. Whatever the diluant used in the formulation, the stability period could not exceed 12 months. Preliminary studies were made on a salt form in order to test the influence of various stress factors and determine if there is interaction between them. From this study, the most influent stress condition, presence of hydrogen peroxide, was selected and a comparative study was performed to compare the stability of molecular and salt species. Solutions of each species were exposed to 5 or 15% of hydrogen peroxide and analyzed at 8, 24, 72 and 216 h of degradation by HPLC-UV. Fractions of detected impurities were purified and collected by semi-preparative HPLC-UV and analyzed by HPLC-UV-ESI-MS and IR spectroscopy in order to determine their structure hypotheses. Theses experiments demonstrate that the salt species were more stable under oxidative stress condition than molecular species. The two main degradation products were collected and identified as 4-amino, 3-nitropyridine and 3,4-diaminopyridine-N-oxide when the molecular form was degraded whereas only 4-amino, 3-nitropyridine was found in less quantity in the salt solutions. Nitrogen pyridine and pyridine amine could not easily be oxidized by hydrogen peroxide in salt comparatively to molecular species due to the lone pair of electron engaged in a bound with hydrogen in the first case and by resonance change of the pyridine in the second case. This modification of structure promoted different pathways of degradation for the salt form which are more dependent of energy. Owing to the better stability of the salt species, a new pharmaceutical form containing it was developed to assess its stability under ICH standard conditions allowing an industrial manufacture of this drug.
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Affiliation(s)
- J A Raust
- Analytical Development Department, Pharmaceutical Establishment of the Paris Hospitals, Agence Générale des Equipements et Produits de Santé, 7 rue du fer à moulin, 75005 Paris, France
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Do B, Goulay-Dufaÿ S, Le Hoang MD, Adoui N, Graffard H, Guyon F, Pradeau D. Sensitive quantification of diphemanil methyl sulphate in human plasma by liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 845:104-8. [PMID: 16962397 DOI: 10.1016/j.jchromb.2006.07.057] [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] [Received: 05/22/2006] [Revised: 07/26/2006] [Accepted: 07/28/2006] [Indexed: 11/26/2022]
Abstract
A simple detection system with a high-performance liquid chromatography (HPLC) with positive ionisation-tandem mass spectrometry (ESI-MS/MS) for determining diphemanil methylsulphate (DMS) levels in human plasma using 4-diphemanylmethylene,1-methylpiperidine as an internal standard (I.S.), is proposed. The acquisition was performed with the multiple reactional monitoring (MRM) mode, by monitoring the transitions: m/z 278>262 for DMS and m/z 263>247 for the I.S. The method involved a simple single-step deproteinisation with acetonitrile. The analyte was chromatographed on a Zorbax C18 reversed-phase chromatographic column by isocratic elution with 10(-3)M ammonium acetate and 10(-3)M hexafluorobutyric acid, adjusted to pH 7.0 with ammoniac/acetonitrile (40/60, v/v). The results were linear over the studied range (0.5-50.0 ng mL(-1)) and the total analysis time for each run was 10 min. The mean extraction apparent recoveries expressed at the 95% intervals of confidence were 94-104% for DMS and 92-106% for the I.S. The intra- and inter-assay precisions were 4.6-8.4% and 2.9-10.6%, respectively. The limit of quantification was 0.15 ng mL(-1). The devised assay was successfully applied to the residual concentrations monitoring in infant.
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Affiliation(s)
- B Do
- Analytical Development Department, Pharmaceutical Establishment of Paris Hospitals. 7 rue du Fer à Moulin, 75005 Paris, France.
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Do B, Goulay-Dufaÿ S, Hoang MDL, Raust JA, Guyon F, Graffard H, Pradeau D. HPLC Method for Determination of 3,4-Diaminopyridine in the Presence of Related Substances and Degradation Products Formed Under Stress Conditions. Chromatographia 2006. [DOI: 10.1365/s10337-006-0821-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Do B, Mari C, Biswal S, Kalinyak J, Quon A, Gambhir SS. Diagnosis of aseptic deep venous thrombosis of the upper extremity in a cancer patient using fluorine-18 fluorodeoxyglucose positron emission tomography/ computerized tomography (FDG PET/CT). Ann Nucl Med 2006; 20:151-5. [PMID: 16615425 DOI: 10.1007/bf02985628] [Citation(s) in RCA: 15] [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: 10/21/2022]
Abstract
We describe a patient with a history of recurrent squamous cell carcinoma of the tongue and abnormal FDG uptake in the left arm during a re-staging FDG PET/CT. After revision of the patient's clinical history, tests and physical exam, the abnormal FDG uptake was found to correspond to an extensive aseptic deep venous thrombosis of the upper extremity.
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Affiliation(s)
- B Do
- Stanford University Medical Center, Nuclear Medicine Division, Department of Radiology and Molecular Imaging Program at Stanford, USA.
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16
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Goulay-Dufaÿ S, Do B, Le Hoang MD, Raust JA, Graffard H, Guyon F, Pradeau D. Determination of A 3,4-diaminopyridine in plasma by liquid chromatography with electrochemical detection using solid-phase extraction. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 805:261-6. [PMID: 15135099 DOI: 10.1016/j.jchromb.2004.03.010] [Citation(s) in RCA: 3] [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] [Received: 11/04/2003] [Revised: 03/04/2004] [Accepted: 03/05/2004] [Indexed: 11/20/2022]
Abstract
In order to quantify a small amount of a drug, 3,4-diaminopyridine (3,4-DAP), in animal plasma samples, an analytical method was developed. It involved an extraction of 3,4-DAP and phenylephrine, used as internal standard (IS), from plasma with solid-phase extraction (SPE) on C18 cartridges. This analytical method is a hyphenated technique based on high-performance liquid chromatography with electrochemical detection (HPLC-EC) whose purpose is to obtain first a sensitive method and second a satisfying separation between 3,4-DAP and phenylephrine. The analytical method is accurate, specific, and linear between 10 and 500 g of 3,4-DAP per litre. The recovery of 3,4-DAP is estimated at 70.8% with a 95% confidence interval of (66.0 -75.6%). Intermediate precision was evaluated on three quality control samples; the intra-day precision was estimated at 13.5, 9.1, 7.8% and the inter-day precision at 17.9, 8.4, 9.3%. The limit of quantification of the method was evaluated at 10 g l-1. First toxicokinetic parameters determined on dogs plasma samples after one 3,4-DAP oral administration of 1 mg kg-1 were: Cmax=395.7 microg l-1; Tmax =15 min; t1/2=113.6 min; Clearance/F=16.8 ml kg-1 min-1 and Vd/F=2.7 l kg -1.
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17
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Do B, Huang R, Goldman S, Gaballa M, Thai H. 224 MODULATION OF IMPAIRED NITRIC OXIDE MEDIATED ENDOTHELIAL DEPENDENT VASORELAXATION IN CONGESTIVE HEART FAILURE THROUGH β-ADRENERGIC RECEPTOR MANIPULATION. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-224] [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: 11/04/2022]
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18
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Juneman E, Castellano L, Do B, Dahiya R, Goldman S, Gaballa M, Thai H. 232 REGIONAL WALL STRESS IN THE NON-INFARCTED MYOCARDIUM IS INCREASED AFTER ACUTE MYOCARDIAL INFARCTION. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-232] [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: 11/03/2022]
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19
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Nam H, Do B, Yoon S, Roh S, Yoon H. Preparation of reconstructed mature oocytes by nuclear transfer of primordial follicular oocytes in bovine. Fertil Steril 2001. [DOI: 10.1016/s0015-0282(01)02808-4] [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: 11/30/2022]
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20
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Do B, Robinet S, Pradeau D, Guyon F. Speciation of arsenic and selenium compounds by ion-pair reversed-phase chromatography with electrothermic atomic absorption spectrometry. Application of experimental design for chromatographic optimisation. J Chromatogr A 2001; 918:87-98. [PMID: 11403459 DOI: 10.1016/s0021-9673(01)00723-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
An off-line system is proposed consisting of ion-pair reversed-phase liquid chromatography, collections of fractions at the outflow of the column and furnace atomic absorption spectrometry. The so-called system allowed determination of both arsenic and selenium species mainly found in the environment and in mammals (arsenite, arsenate, monomethylarsonate, dimethylarsinate, selenite, selenate, selenocystamine, selenocystine, selenomethionine and selenoethionine). In order to study the retention behaviour of these compounds and to estimate the optimal conditions for the chromatographic separation, central composite designs were used to evaluate the influence of the eluent parameters such as pH, tetrabutylammonium phosphate (TBA) concentration and sodium hydrogenphosphate amounts. The retention factors of each species and the selectivity were established as response criteria. Response surfaces and isoresponse curves were drawn from the mathematical models and enabled one to determine the optimal conditions and to visualise the method robustness. The predicted optimal zone was situated at pH 5.5-6.5, 4.0 mM Na2HPO4 and 3.0-4.0 mM TBA. Regression models suggested linearity for the studied compounds in the range 25-200 microg selenium and arsenic per litre investigated.
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Affiliation(s)
- B Do
- Laboratoire Central d'Analyses, Pharmacie Centrale des Hĵpitaux de Paris, France
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21
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Do B, Robinet S, Pradeau D, Guyon F. Application of central composite designs for optimisation of the chromatographic separation of monomethylarsonate and dimethylarsinate and of selenomethionine and selenite by ion-pair chromatography coupled with plasma mass spectrometric detection. Analyst 2001; 126:594-601. [PMID: 11394299 DOI: 10.1039/b008169h] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Central composite designs (CCDs) were used in the study of the ion-pair chromatographic separation of arsenic and selenium species in tap water: monomethylarsonate, dimethylarsinate, selenomethionine and selenite. The ternary eluent consisted of tetrabutylammonium phosphate (TBA), sodium hydrogenphosphate (Na2HPO4) and 1% acetonitrile. CCD allowed the investigation of the influence of the eluent parameters, which varied from 0.5 to 4.2 mmol l-1 Na2HPO4, 0.5 to 4.2 mmol l-1 TBA and pH 4.9 to 8.2, on the capacity factors (k') of arsenic and selenium compounds. Furthermore, another mathematical model that permitted the variation of the chromatographic selectivity of species, computed from their retention data to be followed, was investigated. This showed the ability to locate the optimum conditions within the experimental design, so that arsenic and selenium species could be simultaneously quantified with good efficiency and resolution. A comparison between the predicted and the experimental response values was made in order to assess the prediction quality of the model. Response surfaces and isoresponse curves obtained from the mathematical models allowed the determination of the optimum chromatographic conditions and the robustness of the method. The predicted optimum zone allowing satisfactory determination of both arsenic and selenium compounds was pH 5.5-6.5, 2.5 mmol l-1 Na2HPO4 and 3.0-4.0 mmol l-1 TBA.
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Affiliation(s)
- B Do
- Laboratoire Central d'Analyses, Pharmacie Central des Hôpitaux de Paris, 7 rue du Fer à Moulin, 75005 Paris, France
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22
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McDonald FE, Wang X, Do B, Hardcastle KI. Synthesis of oxepanes and trans-fused bisoxepanes via biomimetic, endo-regioselective tandem oxacyclizations of polyepoxides. Org Lett 2000; 2:2917-9. [PMID: 10964398 DOI: 10.1021/ol0064009] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] This communication describes the first examples of tandem endo-regioselective and stereospecific oxacyclizations of 1, 5-diepoxides to oxepane products and a similar tandem oxacyclization of 1,5,9-triepoxides to fused bisoxepane cyclic carbonates. A mechanism for these biomimetic oxacyclizations is proposed in which the epoxides act as both electrophilic and nucleophilic reaction partners.
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Affiliation(s)
- F E McDonald
- Department of Chemistry, Emory University, 1515 Pierce Drive, Atlanta, Georgia 30322, USA.
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23
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Mouroux M, Yvon-Groussin A, Peytavin G, Delaugerre C, Legrand M, Bossi P, Do B, Trylesinski A, Diquet B, Dohin E, Delfraissy JF, Katlama C, Calvez V. Early virological failure in naive human immunodeficiency virus patients receiving saquinavir (soft gel capsule)-stavudine-zalcitabine (MIKADO trial) is not associated with mutations conferring viral resistance. J Clin Microbiol 2000; 38:2726-30. [PMID: 10878071 PMCID: PMC87009 DOI: 10.1128/jcm.38.7.2726-2730.2000] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The MIKADO trial was designed to evaluate the efficacy of stavudine-zalcitabine-saquinavir (soft gel capsule) [d4T-ddC-SQV(SGC)] in 36 naive patients (-3.3 log(10) units at week 24 [W24]). Among the 29 patients remaining on d4T-ddC-SQV(SGC) until W24, 10 harbored a virological failure (viral load of >200 copies/ml at W24) (group 1). To determine the reasons for therapeutic failure, genotypic and phenotypic resistance test results and SQV concentrations in plasma were analyzed and compared to those in successfully treated patients (viral load of <200 copies/ml at W24) (group 2). Reverse transcriptase and protease genotypic analyses in group 1 revealed the acquisition of only one SQV-associated mutation (L90M) in only two patients. There was no significant increase in the 50 or 90% inhibitory concentration of SQV in patients with or without the L90M mutation. However, the fact that two patients developed an L90M mutation only 4 weeks after relapse points to the need for genotypic resistance testing in the context of an initial failure of the antiretroviral regimen. At W24, the median SQV concentration in group 1 (71 ng/ml) was significantly lower than in group 2 (475 ng/ml), and the plasma SQV concentration was correlated with the viral load at W24 (r = -0.5; P<0.05) and with the drop in viral load between day 0 and W24 (r = -0.5; P<0.01). These results and the fact that the plasma SQV concentrations in the two groups prior to relapse (W12) were not significantly different strongly suggest that the early failure of this combination is not due to viral resistance but to a lack of compliance, pharmacological variability, and drug interactions or a combination of these factors.
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Affiliation(s)
- M Mouroux
- Department of Virology, Pitié-Salpêtrière Hospital, Paris, France
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24
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Do B, Alet P, Pradeau D, Poupon J, Guilley-Gaillot M, Guyon F. On-line reversed-phase liquid chromatography hydride generation emission spectrometry: speciation of arsenic in urine of patients intravenously treated with As2O3. J Chromatogr B Biomed Sci Appl 2000; 740:179-86. [PMID: 10821403 DOI: 10.1016/s0378-4347(00)00047-5] [Citation(s) in RCA: 12] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hydride generation inductively coupled plasma-atomic emission spectrometry (HG ICP-AES) was used as a continuous detection system for the determination of arsenic in the eluate from a high-performance liquid chromatographic (HPLC) system. Four arsenic species [arsenite As(III), arsenate As(V), monomethylarsonate (MMA), and dimethylarsinate (DMA)] present in the urine samples of patients treated intravenously with arsenite, were analyzed separately by HPLC-HG-ICP-AES using a non-polar C18 column. This analytical method allowed the sensitive determination of the arsenic species in the submicrogram per liter range. Urine samples collected on different days after arsenite administration were found to contain arsenite predominantly--monomethylarsonate and dimethylarsinate were also detected.
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Affiliation(s)
- B Do
- Laboratoire Central d'Analyses, Pharmacie Centrale des Hôpitaux de Paris, France
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25
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Thanh XD, Massicot F, Do B, Breget R, Durand D, Warnet JM, Claude JR, Taniguchi N, Clot JP. Effects of 24R,25-dihydroxyvitamin D3 on alkaline phosphatase activity in pig renal epithelial LLC-PK1 cells in culture. Gen Pharmacol 1998; 31:459-62. [PMID: 9703220 DOI: 10.1016/s0306-3623(98)00011-1] [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] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
1. The effects of 24R,25-dihydroxyvitamin D3 [24,25(OH)2D3] on alkaline phosphatase activity (ALP) were evaluated in pig kidney LLC-PK1 cells in culture. 2. The vitamin D3 metabolite increased ALP activity in these cells, whereas no effect of the hormone was observed on gamma-glutamyltranspeptidase and acid phosphatase activities. 3. ALP activity was stimulated after 3- to 12-hr incubation in the presence of 10(-9) mol/l 24,25(OH)2D3 with a maximum after 6 hr. 4. The hormonal induction of ALP activity was prevented by pretreatment of cells by actinomycin D. 5. It is proposed that 24,25(OH)2D3 could increase ALP activity by de novo protein synthesis.
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Affiliation(s)
- X D Thanh
- Laboratoire de Pharmacologie/CHU-UFR de Pharmacie, Université d'Angers, France
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26
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Massicot F, Do Than X, Do B, Durand M, Warnet JM, Claude J, Clot UP. Stimulating effect of 24, 25-Dihydroxy-vitamin D3 on brush border membrane activities in LLC-PK1 renal epithelial cells. Toxicol Lett 1998. [DOI: 10.1016/s0378-4274(98)80665-6] [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: 11/27/2022]
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27
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Burnat P, Robles F, Do B. High-performance liquid chromatographic determination of modafinil and its two metabolites in human plasma using solid-phase extraction. J Chromatogr B Biomed Sci Appl 1998; 706:295-304. [PMID: 9551816 DOI: 10.1016/s0378-4347(97)00550-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A simple procedure for the simultaneous determination of modafinil, its acid and sulfone metabolites in plasma is described. The assay involved an extraction of the drug, metabolites and internal standard from plasma with a solid-phase extraction using C18 cartridges. These compounds were eluted by methanol. The extract was evaporated to dryness at 40 degrees C under a gentle stream of nitrogen. The residue was redissolved in 250 microl of mobile-phase and a 30 microl aliquot was injected via an automatic sampler into the liquid chromatograph and eluted with the mobile-phase (26%, v/v acetonitrile in 0.05 M orthophosphoric acid buffer adjusted to pH 2.6) at a flow-rate of 1.1 ml/min on a C8 Symmetry cartridge column (5 microm, 150 mm x 3.9 mm, Waters) at 25 degrees C. The eluate was detected at 225 nm. Intra-day coefficients of variation ranged from 1.0 to 2.9% and inter-day coefficients from 0.9 to 6.1%. The limits of detection and quantitation of the assay were 0.01 microg/ml and 0.10 microg/ml respectively.
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Affiliation(s)
- P Burnat
- Laboratoire de Biochimie et Toxicologie Cliniques, Hôpital d'Instruction des Armées Bégin, Saint-Mandé, France
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28
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Do Thanh X, Massicot F, Do B, Breget R, Nivet V, Durand D, Warnet JM, Claude JR, Clot JP. 1 alpha,25-dihydroxyvitamin D3 stimulated alkaline phosphatase activity in cultured pig kidney epithelial LLC-PK1 cells. Acta Physiol Scand 1996; 158:107-11. [PMID: 8876754 DOI: 10.1046/j.1365-201x.1996.481282000.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] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The effects of 1 alpha,25-dihydroxyvitamin D3 (1,25 (OH)2D3) and human growth hormone (hGH) on the activity of alkaline phosphatase (ALP) were evaluated in pig kidney LLC-PK1 cultured cells. 1,25(OH)2D3 (10(-9)-10(-6) mol L-1) and hGH (10(-7) mol L-1) increased ALP activity in these cells while no hormonal effect was detected on two other enzyme activities: gamma-glutamyl transferase and acid phosphatase. ALP activity was maximally increased after 4.5-6 h incubation with both hormones. The hormonal induction of ALP activity was prevented by a pretreatment of cells with actinomycin D. Thus, 1,25 (OH)2D3 and may be hGH could stimulate ALP activity via a transcription of some gene.
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Affiliation(s)
- X Do Thanh
- Laboratoire de Biochimie/Physiologie, UFR de Médecine/Pharmacie, Université d'Angers, France
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29
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Varkey JP, Muhlrad PJ, Minniti AN, Do B, Ward S. The Caenorhabditis elegans spe-26 gene is necessary to form spermatids and encodes a protein similar to the actin-associated proteins kelch and scruin. Genes Dev 1995; 9:1074-86. [PMID: 7744249 DOI: 10.1101/gad.9.9.1074] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.4] [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: 01/26/2023]
Abstract
Six independent mutations in the Caenorhabditis elegans spe-26 gene cause sterility in males and hermaphrodites by disrupting spermatogenesis. Spermatocytes in mutants with the most severe alleles fail to complete meiosis and do not form haploid spermatids. Instead, these spermatocytes arrest with missegregated chromosomes and mislocalized actin filaments, endoplasmic reticulum and ribosomes. In spite of this arrest some of the nuclei and the organelles that normally transport sperm-specific components to the spermatid mature as if they were in spermatids. The spe-26 gene is expressed throughout the testis in both spermatogonial cells and spermatocytes. It encodes a 570-amino-acid polypeptide, which contains five tandem repeat motifs, each of approximately 50 amino acids. These repeats are similar in sequence to repeats in the Drosophila kelch protein, in the invertebrate sperm protein scruin that cross-links actin filaments, as well as in the mouse and pox virus proteins. The functional importance of these repeat motifs is shown by the fact that five of the spe-26 mutations are in the tandem repeats, and one of the most severe mutations is a substitution in a highly conserved glycine. These results suggest that spe-26 encodes a cytoskeletal protein, perhaps actin binding, which is necessary to segregate the cellular components that form haploid spermatids.
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Affiliation(s)
- J P Varkey
- Department of Molecular and Cellular Biology, University of Arizona, Tucson 85721, USA
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