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Coutzac C, Jouniaux JM, Paci A, Schmidt J, Mallardo D, Seck A, Asvatourian V, Cassard L, Saulnier P, Lacroix L, Woerther PL, Vozy A, Naigeon M, Nebot-Bral L, Desbois M, Simeone E, Mateus C, Boselli L, Grivel J, Soularue E, Lepage P, Carbonnel F, Ascierto PA, Robert C, Chaput N. Systemic short chain fatty acids limit antitumor effect of CTLA-4 blockade in hosts with cancer. Nat Commun 2020; 11:2168. [PMID: 32358520 PMCID: PMC7195489 DOI: 10.1038/s41467-020-16079-x] [Citation(s) in RCA: 225] [Impact Index Per Article: 56.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 04/08/2020] [Indexed: 12/19/2022] Open
Abstract
Gut microbiota composition influences the clinical benefit of immune checkpoints in patients with advanced cancer but mechanisms underlying this relationship remain unclear. Molecular mechanism whereby gut microbiota influences immune responses is mainly assigned to gut microbial metabolites. Short-chain fatty acids (SCFA) are produced in large amounts in the colon through bacterial fermentation of dietary fiber. We evaluate in mice and in patients treated with anti-CTLA-4 blocking mAbs whether SCFA levels is related to clinical outcome. High blood butyrate and propionate levels are associated with resistance to CTLA-4 blockade and higher proportion of Treg cells. In mice, butyrate restrains anti-CTLA-4-induced up-regulation of CD80/CD86 on dendritic cells and ICOS on T cells, accumulation of tumor-specific T cells and memory T cells. In patients, high blood butyrate levels moderate ipilimumab-induced accumulation of memory and ICOS + CD4 + T cells and IL-2 impregnation. Altogether, these results suggest that SCFA limits anti-CTLA-4 activity. The gut microbiota has been reported to regulate the efficacy of cancer therapy. Here, the authors show that short-chain fatty acids, which are generated through bacterial fermentation, increases immune tolerance leading to resistance to anti-CTLA-4 immunotherapy in mice and patients with metastatic melanoma.
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Affiliation(s)
- Clélia Coutzac
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France.,Université Paris-Saclay, Faculté de Médicine, Le Kremlin Bicêtre, F-94276, France.,Université Paris-Descartes, Faculté de Médicine, F-75006, Paris, France.,Hôpital Européen Georges Pompidou, Département de Gastroentérologie et Oncologie Digestive, Assistance Publique-Hôpitaux de Paris, F-75015, Paris, France
| | - Jean-Mehdi Jouniaux
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France.,Université Paris-Saclay, Faculté de Médicine, Le Kremlin Bicêtre, F-94276, France
| | - Angelo Paci
- Université Paris-Saclay, Institut Gustave Roussy, CNRS, Vectorologie et thérapeutiques anticancéreuses, F-94805, Villejuif, France.,Institut Gustave Roussy, Pharmacology and Drug Analysis Department, Villejuif, F-94805, France.,Université Paris-Saclay, Faculté de Pharmacie, Chatenay-Malabry, F-92296, France
| | - Julien Schmidt
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France.,Université Paris-Saclay, Faculté de Médicine, Le Kremlin Bicêtre, F-94276, France
| | - Domenico Mallardo
- Unit of Melanoma, Cancer Immunotherapy and Development Therapeutics, Instituto Nazionale Tumori- IRCCS -Fondazione G. Pascale, Napoli, Italia
| | - Atmane Seck
- Université Paris-Saclay, Institut Gustave Roussy, CNRS, Vectorologie et thérapeutiques anticancéreuses, F-94805, Villejuif, France.,Institut Gustave Roussy, Pharmacology and Drug Analysis Department, Villejuif, F-94805, France
| | - Vahe Asvatourian
- Institut Gustave Roussy, Biostatistics and Epidemiology Unit, Villejuif, F-94805, France.,Université Paris-Saclay, UVSQ, Inserm, CESP, 94807, Villejuif, France
| | - Lydie Cassard
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France
| | - Patrick Saulnier
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Genomic platform Molecular Biopathology unit and Biological Resource Center, F-94805, Villejuif, France
| | - Ludovic Lacroix
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Genomic platform Molecular Biopathology unit and Biological Resource Center, F-94805, Villejuif, France
| | - Paul-Louis Woerther
- Institut Gustave Roussy, Department of Medical Biology and Pathology, Microbiology unit, Villejuif, F-94805, France
| | - Aurore Vozy
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France
| | - Marie Naigeon
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France
| | - Laetitia Nebot-Bral
- Université Paris-Saclay, Faculté de Médicine, Le Kremlin Bicêtre, F-94276, France.,Université Paris-Saclay, Institut Gustave Roussy, CNRS, Stabilité génétique et oncogenèse, 94805, Villejuif, France
| | - Mélanie Desbois
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France
| | - Ester Simeone
- Unit of Melanoma, Cancer Immunotherapy and Development Therapeutics, Instituto Nazionale Tumori- IRCCS -Fondazione G. Pascale, Napoli, Italia
| | - Christine Mateus
- Institut Gustave Roussy, Dermatology Unit, Department of Medicine, Villejuif, F-94805, France
| | - Lisa Boselli
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France
| | - Jonathan Grivel
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France
| | - Emilie Soularue
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France.,Université Paris-Saclay, Faculté de Médicine, Le Kremlin Bicêtre, F-94276, France.,Hôpital du Kremlin Bicêtre Department of Gastroenterology, Assistance Publique-Hôpitaux de Paris, Le Kremlin Bicêtre, France
| | - Patricia Lepage
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Franck Carbonnel
- Université Paris-Saclay, Faculté de Médicine, Le Kremlin Bicêtre, F-94276, France.,Hôpital du Kremlin Bicêtre Department of Gastroenterology, Assistance Publique-Hôpitaux de Paris, Le Kremlin Bicêtre, France
| | - Paolo Antonio Ascierto
- Unit of Melanoma, Cancer Immunotherapy and Development Therapeutics, Instituto Nazionale Tumori- IRCCS -Fondazione G. Pascale, Napoli, Italia
| | - Caroline Robert
- Université Paris-Saclay, Faculté de Médicine, Le Kremlin Bicêtre, F-94276, France.,Institut Gustave Roussy, Dermatology Unit, Department of Medicine, Villejuif, F-94805, France
| | - Nathalie Chaput
- Université Paris-Saclay, Institut Gustave Roussy, Inserm, CNRS, Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse, Laboratoire d'Immunomonitoring en Oncologie, F-94805, Villejuif, France. .,Université Paris-Saclay, Faculté de Pharmacie, Chatenay-Malabry, F-92296, France. .,Université Paris-Saclay, Institut Gustave Roussy, CNRS, Stabilité génétique et oncogenèse, 94805, Villejuif, France.
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Boulate G, Amazit L, Naman A, Seck A, Paci A, Lombes A, Pussard E, Baudin E, Lombes M, Hescot S. Potentiation of mitotane action by rosuvastatin: New insights for adrenocortical carcinoma management. Int J Oncol 2019; 54:2149-2156. [PMID: 30942448 DOI: 10.3892/ijo.2019.4770] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 03/15/2019] [Indexed: 11/06/2022] Open
Abstract
Mitotane (also termed o,p'‑DDD) is the most effective therapy for advanced adrenocortical carcinoma (ACC). Mitotane‑induced dyslipidemia is treated with statins. Mitotane and statins are known to exert anti‑proliferative effects in vitro; however, the effects of statins have never been directly evaluated in patients with ACC and ACC cells, at least to the best of our knowledge. Thus, in this study, we aimed to examine the effects of the rosuvastatin on ACC cells. It has been shown that the combined use of mitotane and statins significantly increases the tumor control rate in patients with ACC; however, it would be of interest to elucidate the molecular mechanisms involved in this potentiation. In this study, we examined the effects of mitotane, rosuvastatin and their combination in NCI‑H295R human ACC cells using proliferation assays, gene expression analyses and free intracellular cholesterol measurements. The results revealed that mitotane dose‑dependently reduced cell viability, induced apoptosis and increased intracellular free cholesterol levels, considered as one of the key features of mitotane action, while rosuvastatin alone reduced cell viability and increased apoptosis at high concentrations. We also demonstrated that rosuvastatin potentiated the effects of mitotane by reducing cell viability, inducing apoptosis, increasing intracellular free cholesterol levels, and by decreasing the expression of 3‑hydroxy‑3‑methylglutaryl‑CoA reductase (HMGCR) and ATP binding cassette subfamily a member 1 (ABCA1), genes involved in cholesterol metabolism, and inhibiting steroidogenesis. Collectively, potentiating the effects of mitotane with the use of rosuvastatin may provide novel therapeutic strategies for ACC, given that the combination of these drugs, pending clinical validation, may lead to the better management of ACC.
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Affiliation(s)
| | - Larbi Amazit
- INSERM UMR‑S 1185, 94276 Le Kremlin‑Bicêtre Cedex, France
| | | | - Atmane Seck
- Department of Pharmacology, Gustave Roussy, 94800 Villejuif, France
| | - Angelo Paci
- Department of Pharmacology, Gustave Roussy, 94800 Villejuif, France
| | - Anne Lombes
- INSERM UMRS 1016, Cochin Institute, 75014 Paris, France
| | - Eric Pussard
- Department of Genetics and Hormonology, APHP, 94270 Le Kremlin‑Bicêtre Cedex, France
| | - Eric Baudin
- INSERM UMR‑S 1185, 94276 Le Kremlin‑Bicêtre Cedex, France
| | - Marc Lombes
- INSERM UMR‑S 1185, 94276 Le Kremlin‑Bicêtre Cedex, France
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Houndjo DS, Ba E, Faye M, Ba F, Sar FB, Ouedraogo V, Seck A, Sow A, Camara M, Seck S, Diaw M, Touré M, Mbengue A, Ba A, Samb A. [Prescription And Delivery's Survey Of Benzodiazepines In The Occurrence Of Addictions At Mbour's District]. Mali Med 2019; 34:30-34. [PMID: 35897247] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
UNLABELLED Impact of the prescription and delivery of benzodiazepines in the occurrence of addictions in the district of Mbour. INTRODUCTION Benzodiazepines (BZD) are widely used nowadays and are at the origin of an addiction. OBJECTIVES The objective was to evaluate the quality of benzodiazepine prescribing and delivery in the Mbour department of Senegal and subsequently to implement an addictovigilance strategy. Thus, we studied the prescribing habits, the quality of delivery and identified the consumption habits of these drugs. MATERIALS AND METHODS It was a cross-sectional, prospective study with two questionnaires: addressed to patients and prescribers, conducted in pharmacies, hospitals, districts and Mbour health posts. RESULTS 44% of BZD prescriptions were prescribed by doctors and especially general practitioner. 31.1% did not comply with the rules of prescription (marketing authorization). As for the dispensing rules, (85.3%) were dispensed without a prescription. The level of consumption was high in the 30-40 age group (43.95%) predominantly female (59%). Insomnia predominated as a reason for prescription (16.4%) on anxiety (11.94%) with (65.5%) dependence. CONCLUSION The abuses observed in the prescription, the delivery and consumption of BZD, constitutes a real health problem. Half of the consumers become addicted, hence the need for a national addictovigilance program.
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Affiliation(s)
- D S Houndjo
- Laboratoire de Physiologie et d'Explorations Fonctionnelles. Université Cheikh Anta Diop de Dakar. Faculté de Médecine, de Pharmacie et d'Odontologie-Sénégal
- Clinique de Psychiatrie et Psychologie médicale, CHNU Fann, UCAD
| | - Ehm Ba
- Clinique de Psychiatrie et Psychologie médicale, CHNU Fann, UCAD
| | - M Faye
- Clinique de Psychiatrie et Psychologie médicale, CHNU Fann, UCAD
| | - F Ba
- Laboratoire de Physiologie Humaine, UFR2S, UGB, Sénégal
| | - F B Sar
- Laboratoire de Physiologie Humaine, UFR des sciences de la santé, UT, Sénégal
- UMI 3189. « Environnement, santé, sociétés. CNRS » CNRST Université Bamako-UCAD, Dakar, Sénégal
| | - V Ouedraogo
- Laboratoire de Physiologie Humaine, UFR des sciences de la santé, UT, Sénégal
| | - A Seck
- Laboratoire de Physiologie et d'Explorations Fonctionnelles. Université Cheikh Anta Diop de Dakar. Faculté de Médecine, de Pharmacie et d'Odontologie-Sénégal
| | - A Sow
- Laboratoire de Physiologie et d'Explorations Fonctionnelles. Université Cheikh Anta Diop de Dakar. Faculté de Médecine, de Pharmacie et d'Odontologie-Sénégal
| | - M Camara
- Clinique de Psychiatrie et Psychologie médicale, CHNU Fann, UCAD
| | - S Seck
- Clinique de Psychiatrie et Psychologie médicale, CHNU Fann, UCAD
| | - M Diaw
- Laboratoire de Physiologie et d'Explorations Fonctionnelles. Université Cheikh Anta Diop de Dakar. Faculté de Médecine, de Pharmacie et d'Odontologie-Sénégal
| | - M Touré
- Laboratoire de Physiologie et d'Explorations Fonctionnelles. Université Cheikh Anta Diop de Dakar. Faculté de Médecine, de Pharmacie et d'Odontologie-Sénégal
| | - A Mbengue
- Laboratoire de Physiologie Humaine, UFR des sciences de la santé, UT, Sénégal
| | - A Ba
- Laboratoire de Physiologie et d'Explorations Fonctionnelles. Université Cheikh Anta Diop de Dakar. Faculté de Médecine, de Pharmacie et d'Odontologie-Sénégal
| | - A Samb
- Laboratoire de Physiologie et d'Explorations Fonctionnelles. Université Cheikh Anta Diop de Dakar. Faculté de Médecine, de Pharmacie et d'Odontologie-Sénégal
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4
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Seck A, Hichami A, Doucouré S, Diallo Agne F, Bassène H, Ba A, Sokhna C, Khan NA, Samb A. Th1/Th2 Dichotomy in Obese Women with Gestational Diabetes and Their Macrosomic Babies. J Diabetes Res 2018; 2018:8474617. [PMID: 30539027 PMCID: PMC6261071 DOI: 10.1155/2018/8474617] [Citation(s) in RCA: 8] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 09/25/2018] [Indexed: 12/17/2022] Open
Abstract
The aim of the study was to assess T cell differentiation and the modulation of inflammatory cytokines in obese and gestational diabetes mellitus (GDM) women and their macrosomic newborns. Hence, immediately after delivery, blood samples were collected through the mother's arm vein and the umbilical cordon vein. Biochemical parameters measured were HbA1C, glucose, insulin, triglyceride (TG), total cholesterol (Tchol), HDL cholesterol (HDLchol), and LDL cholesterol (LDLchol). T lymphocytes were purified from the total blood with Ficoll-Paque. The mRNA expression of inflammatory markers in T cells was determined by RT-qPCR. We observed that diabetic mothers exhibited higher HbA1C, glycemia, insulinemia, TG, Tchol, HDLchol, and LDLchol levels than control mothers. Glycemia was not significantly different between macrosomic and control newborns. However, insulinemia was high in macrosomic babies. TG, Tchol, HDLchol, and LDLchol were not significantly different between macrosomic and control babies. In diabetic mothers, mRNA expression of the Th1 cell subtype was significantly increased. Th1 markers were upregulated in babies born to diabetic women than in control newborns. However, expression of two Th2 markers (GATA3 and IL-4) was not significantly different between control and GDM women and between their respective newborns. Interestingly, IL-10 mRNA expression was decreased in diabetic mothers and their offsprings. The Th1/Th2 cytokine ratio was increased in GDM obese mothers and their macrosomic newborns, suggesting a proinflammatory status in these subjects.
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Affiliation(s)
- A. Seck
- Laboratory of Physiology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
| | - A. Hichami
- U1231 INSERM/Université de Bourgogne-Franche Comté (UBFC)/Agro-Sup, Physiologie de la Nutrition & Toxicologie, Dijon 21000, France
| | - S. Doucouré
- Institute of Research for Development, VITROME Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Mediterranean Infection, CP18524 Dakar, Senegal
| | - F. Diallo Agne
- Laboratory of Biochemistry and Molecular Biology, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
| | - H. Bassène
- Institute of Research for Development, VITROME Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Mediterranean Infection, CP18524 Dakar, Senegal
| | - A. Ba
- Laboratory of Physiology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
- UMI 3189, “Environnement, Santé, Sociétés”, CNRS, CNRST, Université Bamako-UCAD, Dakar, Senegal
| | - C. Sokhna
- Institute of Research for Development, VITROME Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Mediterranean Infection, CP18524 Dakar, Senegal
| | - N. A. Khan
- U1231 INSERM/Université de Bourgogne-Franche Comté (UBFC)/Agro-Sup, Physiologie de la Nutrition & Toxicologie, Dijon 21000, France
| | - A. Samb
- Laboratory of Physiology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
- UMI 3189, “Environnement, Santé, Sociétés”, CNRS, CNRST, Université Bamako-UCAD, Dakar, Senegal
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5
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Kacou-Ndouba A, Revathi G, Mwathi P, Seck A, Diop A, Kabedi-Bajani MJ, Mwiti W, Anguibi-Pokou MJ, Morrissey I, Torumkuney D. Results from the Survey of Antibiotic Resistance (SOAR) 2011-14 in the Democratic Republic of Congo, Ivory Coast, Republic of Senegal and Kenya. J Antimicrob Chemother 2016; 71 Suppl 1:i21-31. [PMID: 27048579 DOI: 10.1093/jac/dkw070] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES To assess antibiotic susceptibility of community-acquired respiratory tract isolates from Ivory Coast, Kenya, Democratic Republic of Congo (DRC) and Senegal in 2011-14. METHODS Bacterial isolates were collected and MICs determined using Etest(®) for all antibiotics except erythromycin, for which testing was by disc diffusion. Susceptibility was assessed using CLSI, EUCAST and pharmacokinetic/pharmacodynamic (PK/PD) breakpoints. For macrolide interpretation, CLSI breakpoints were adjusted for incubation in CO2. RESULTS Susceptibility to penicillin (using CLSI oral or EUCAST breakpoints) was low among isolates of Streptococcus pneumoniae from the DRC and Kenya (17.4% and 19%, respectively) but higher among isolates from the Ivory Coast (70%) and Senegal (85.7%). Penicillin susceptibility using CLSI iv breakpoints was higher in all countries, but still only 69.6% in the DRC. Macrolide susceptibility (based on CLSI erythromycin disc diffusion breakpoints) was also low in Kenya (∼65%) but 87%-100% elsewhere. Haemophilus influenzae were only collected in the DRC and Senegal, with β-lactamase prevalence of 39% and 4%, respectively. Furthermore, β-lactamase-negative ampicillin-resistant (BLNAR) isolates were found in DRC (four isolates, 17%), but only two isolates were found in Senegal (by EUCAST definition). Amoxicillin/clavulanic acid in vitro susceptibility was 73.9% in the DRC and 100% in Senegal based on CLSI breakpoints, but this reduced to 65.2% in the DRC when BLNAR rates were considered. Clarithromycin susceptibility was >95% in both countries. CONCLUSIONS There was considerable variability in antibiotic susceptibility among the African countries participating in the surveillance programme. Thus, continued surveillance is necessary to track future changes in antibiotic resistance. Use of EUCAST versus CLSI breakpoints showed profound differences for cefaclor and ofloxacin against S. pneumoniae, with EUCAST showing lower susceptibility.
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Affiliation(s)
| | - G Revathi
- Department of Pathology, Aga Khan University Hospital, Nairobi, Kenya, PO Box 30270, 00100
| | - P Mwathi
- Kenyatta National Hospital, Microbiology Department, P.O. Box 20723, Nairobi, Kenya 00200
| | - A Seck
- Institute Pasteur Dakar, Dakar Faculty of Medicine, 36 Avenue Pasteur, B.P. 220, Dakar, Senegal
| | - A Diop
- University of Dakar, Faculty of Medicine, BP 45515, Dakar-Fann, Senegal
| | - M J Kabedi-Bajani
- University of Kinshasa, National Institute Biomedical Research (INRB), Kinshasa, Democratic Republic of Congo
| | - W Mwiti
- GlaxoSmithKline Kenya, 23 Likoni Road, P.O. Box 78392, Nairobi, Kenya 00507
| | - M J Anguibi-Pokou
- GlaxoSmithKline West and Central Africa, 7 Rue des Bougainvilliers Cocody, 01 BP 8111 Abidjan 01, Cote d'Ivoire
| | - I Morrissey
- IHMA Europe Sàrl, 9A route de la Corniche, Epalinges 1066, Switzerland
| | - D Torumkuney
- GlaxoSmithKline, 980 Great West Road, Brentford, Middlesex TW8 9GS, UK
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Azan A, Caspers PJ, Bakker Schut TC, Roy S, Boutros C, Mateus C, Routier E, Besse B, Planchard D, Seck A, Kamsu Kom N, Tomasic G, Koljenović S, Noordhoek Hegt V, Texier M, Lanoy E, Eggermont AMM, Paci A, Robert C, Puppels GJ, Mir LM. A Novel Spectroscopically Determined Pharmacodynamic Biomarker for Skin Toxicity in Cancer Patients Treated with Targeted Agents. Cancer Res 2016; 77:557-565. [PMID: 27836854 DOI: 10.1158/0008-5472.can-16-1733] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 09/14/2016] [Accepted: 10/02/2016] [Indexed: 11/16/2022]
Abstract
Raman spectroscopy is a noninvasive and label-free optical technique that provides detailed information about the molecular composition of a sample. In this study, we evaluated the potential of Raman spectroscopy to predict skin toxicity due to tyrosine kinase inhibitors treatment. We acquired Raman spectra of skin of patients undergoing treatment with MEK, EGFR, or BRAF inhibitors, which are known to induce severe skin toxicity; for this pilot study, three patients were included for each inhibitor. Our algorithm, based on partial least squares-discriminant analysis (PLS-DA) and cross-validation by bootstrapping, discriminated to variable degrees spectra from patient suffering and not suffering cutaneous adverse events. For MEK and EGFR inhibitors, discriminative power was more than 90% in the viable epidermis skin layer; whereas for BRAF inhibitors, discriminative power was 71%. There was a 81.5% correlation between blood drug concentration and Raman signature of skin in the case of EGFR inhibitors and viable epidermis skin layer. Our results demonstrate the power of Raman spectroscopy to detect apparition of skin toxicity in patients treated with tyrosine kinase inhibitors at levels not detectable via dermatological inspection and histological evaluation. Cancer Res; 77(2); 557-65. ©2016 AACR.
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Affiliation(s)
- Antoine Azan
- UMR 8203, CNRS, Gustave Roussy, Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France.
| | - Peter J Caspers
- Center for Optical Diagnostics & Therapy, Department of Dermatology, Cancer Institute, Erasmus MC, Rotterdam, the Netherlands.,RiverD International B.V. Rotterdam, the Netherlands
| | - Tom C Bakker Schut
- Center for Optical Diagnostics & Therapy, Department of Dermatology, Cancer Institute, Erasmus MC, Rotterdam, the Netherlands.,RiverD International B.V. Rotterdam, the Netherlands
| | - Séverine Roy
- Department of Medical Oncology, Gustave Roussy, Villejuif, France
| | - Céline Boutros
- Department of Medical Oncology, Gustave Roussy, Villejuif, France
| | - Christine Mateus
- Department of Medical Oncology, Gustave Roussy, Villejuif, France
| | - Emilie Routier
- Department of Medical Oncology, Gustave Roussy, Villejuif, France
| | - Benjamin Besse
- Department of Medical Oncology, Gustave Roussy, Villejuif, France
| | - David Planchard
- Department of Medical Oncology, Gustave Roussy, Villejuif, France
| | - Atmane Seck
- Department of Pharmacology and Drug Analysis, Gustave Roussy, Villejuif, France
| | - Nyam Kamsu Kom
- UMR 981, INSERM, Gustave Roussy, Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France
| | - Gorana Tomasic
- Department of Pathology, Gustave Roussy, Villejuif, France
| | - Senada Koljenović
- Department of Pathology, Cancer Institute, Erasmus MC, Rotterdam, the Netherlands
| | | | - Matthieu Texier
- UMR 1018, INSERM, Gustave Roussy, Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France
| | - Emilie Lanoy
- UMR 1018, INSERM, Gustave Roussy, Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France
| | - Alexander M M Eggermont
- Department of Medical Oncology, Gustave Roussy, Villejuif, France.,Faculty of Medicine, Univ. Paris-Sud, Université Paris-Saclay, Le Kremlin Bicêtre, France
| | - Angelo Paci
- UMR 8203, CNRS, Gustave Roussy, Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France.,Department of Pharmacology and Drug Analysis, Gustave Roussy, Villejuif, France
| | - Caroline Robert
- Department of Medical Oncology, Gustave Roussy, Villejuif, France.,UMR 981, INSERM, Gustave Roussy, Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France.,Faculty of Medicine, Univ. Paris-Sud, Université Paris-Saclay, Le Kremlin Bicêtre, France
| | - Gerwin J Puppels
- Center for Optical Diagnostics & Therapy, Department of Dermatology, Cancer Institute, Erasmus MC, Rotterdam, the Netherlands.,RiverD International B.V. Rotterdam, the Netherlands
| | - Lluis M Mir
- UMR 8203, CNRS, Gustave Roussy, Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France
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7
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Paci A, Hescot S, Seck A, Jublanc C, Mercier L, Vezzosi D, Drui D, Quinkler M, Fassnacht M, Bruckert E, Lombès M, Leboulleux S, Broutin S, Baudin E. Dyslipidemia causes overestimation of plasma mitotane measurements. Endocrinol Diabetes Metab Case Rep 2016; 2016:150135. [PMID: 27298727 PMCID: PMC4901334 DOI: 10.1530/edm-15-0135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 05/12/2016] [Indexed: 11/08/2022] Open
Abstract
Summary
Mitotane (o,p′-DDD) is the standard treatment for advanced adrenocortical carcinoma (ACC). Monitoring of plasma mitotane levels is recommended to look for a therapeutic window between 14 and 20mg/L, but its positive predictive value requires optimization. We report the case of an ACC patient with a history of dyslipidemia treated with mitotane in whom several plasma mitotane levels >30mg/L were found together with an excellent neurological tolerance. This observation led us to compare theoretical or measured o,p′-DDD and o,p′-DDE levels in a series of normolipidemic and dyslipidemic plasma samples to explore potential analytical issues responsible for an overestimation of plasma mitotane levels. We demonstrate an overestimation of mitotane measurements in dyslipidemic patients. Mitotane and o,p′-DDE measurements showed a mean 20% overestimation in hypercholesterolemic and hypertriglyceridemic plasma, compared with normolipidemic plasma. The internal standard p,p′-DDE measurements showed a parallel decrease in hypercholesterolemic and hypertriglyceridemic plasma, suggesting a matrix effect. Finally, diluting plasma samples and/or using phospholipid removal cartridges allowed correcting such interference.
Learning points
Hypercholesterolemia (HCH) and hypertriglyceridemia (HTG) induce an overestimation of plasma mitotane measurements.
We propose a routine monitoring of lipidemic status.
We propose optimized methodology of measurement before interpreting high plasma mitotane levels.
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Affiliation(s)
- Angelo Paci
- 1Pharmacology and Drug Analysis Department, Gustave Roussy, Villejuif, France
| | - Ségolène Hescot
- 2INSERM U1185, Fac Med Paris Sud, Le Kremlin-Bicêtre, France
- 3Nuclear Medicine and Endocrine Oncology Department, Gustave Roussy, Villejuif, France
| | - Atmane Seck
- 1Pharmacology and Drug Analysis Department, Gustave Roussy, Villejuif, France
| | - Christel Jublanc
- 4Assistance Publique-Hôpitaux de Paris, La Pitié-Salpetriere Hospital, Department of Endocrinology, Paris, France
| | - Lionel Mercier
- 1Pharmacology and Drug Analysis Department, Gustave Roussy, Villejuif, France
| | | | - Delphine Drui
- 6CHU Nantes, Department of Endocrinology, Nantes, France
| | | | - Martin Fassnacht
- 8Endocrine and Diabetes Unit, Department of Medicine 1, University Hospital, University of Würzburg, Würzburg, Germany
| | - Eric Bruckert
- 4Assistance Publique-Hôpitaux de Paris, La Pitié-Salpetriere Hospital, Department of Endocrinology, Paris, France
| | - Marc Lombès
- 2INSERM U1185, Fac Med Paris Sud, Le Kremlin-Bicêtre, France
| | - Sophie Leboulleux
- 3Nuclear Medicine and Endocrine Oncology Department, Gustave Roussy, Villejuif, France
| | - Sophie Broutin
- 1Pharmacology and Drug Analysis Department, Gustave Roussy, Villejuif, France
| | - Eric Baudin
- 2INSERM U1185, Fac Med Paris Sud, Le Kremlin-Bicêtre, France
- 3Nuclear Medicine and Endocrine Oncology Department, Gustave Roussy, Villejuif, France
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8
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Ndiaye D, Diongue K, Bane K, Seck A, Niang SO, Lèye Benoist F, Ndiaye D, Touré B. [Efficacy of sodium hydroxide at 2.5 %, chlorhexidine gluconate at 0.5 % and calcium hydroxide against Candida albicans]. J Mycol Med 2016; 26:317-322. [PMID: 27198757 DOI: 10.1016/j.mycmed.2016.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 03/16/2016] [Accepted: 04/06/2016] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Endodontic flora is dominated in the apical part of the channels by strict anaerobic and some facultative anaerobic bacteria but also by Candida yeasts, especially Candida albicans species that are involved in the maintenance and persistence of endodontic infections. Their elimination of the canal system in practice by chemo-mechanical methods of disinfection is not always guaranteed. Thus, this in vitro study was performed to determine the sensitivity of C. albicans with sodium hypochlorite (NaOCl) dosed at 2.5 %, the chlorhexidine digluconate 0.5 % and calcium hydroxide used in inter-session medication. METHODS The diffusion method was used initially to test the sensitivity of C. albicans strains with the above products. Then a dilution technique has allowed us to determine the minimum inhibitory concentration of these active products on C. albicans. RESULTS Strains from infected pulp teeth of patients showed a sensitivity of C. albicans to sodium hypochlorite to a minimum inhibitory concentration less than 70μg/mL and 30μg/mL for chlorhexidine. CONCLUSION This study demonstrated a sensitivity of C. albicans to sodium hypochlorite and chlorhexidine.
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Affiliation(s)
- D Ndiaye
- Département d'odontologie, université Cheikh Anta Diop-Dakar BP 5005 Dakar, Sénégal.
| | - K Diongue
- Laboratoire de parasitologie et de mycologie, CHU Le Dantec, BP 16477, Dakar, Sénégal
| | - K Bane
- Département d'odontologie, université Cheikh Anta Diop-Dakar BP 5005 Dakar, Sénégal
| | - A Seck
- Département d'odontologie, université Cheikh Anta Diop-Dakar BP 5005 Dakar, Sénégal
| | - S O Niang
- Département d'odontologie, université Cheikh Anta Diop-Dakar BP 5005 Dakar, Sénégal
| | - F Lèye Benoist
- Département d'odontologie, université Cheikh Anta Diop-Dakar BP 5005 Dakar, Sénégal
| | - D Ndiaye
- Laboratoire de parasitologie et de mycologie, CHU Le Dantec, BP 16477, Dakar, Sénégal
| | - B Touré
- Département d'odontologie, université Cheikh Anta Diop-Dakar BP 5005 Dakar, Sénégal
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9
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Simon-Yarza MT, Baati T, Paci A, Lesueur LL, Seck A, Chiper M, Gref R, Serre C, Couvreur P, Horcajada P. Antineoplastic busulfan encapsulated in a metal organic framework nanocarrier: first in vivo results. J Mater Chem B 2016; 4:585-588. [DOI: 10.1039/c5tb02084k] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [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
Nanoparticles of a mesoporous iron(iii) trimesate MIL-100 nanocarrier encapsulating high amounts of the challenging antineoplastic busulfan were administered to rats and compared with the commercial Busilvex®.
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10
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Hescot S, Seck A, Guerin M, Cockenpot F, Huby T, Broutin S, Young J, Paci A, Baudin E, Lombès M. Lipoprotein-Free Mitotane Exerts High Cytotoxic Activity in Adrenocortical Carcinoma. J Clin Endocrinol Metab 2015; 100:2890-8. [PMID: 26120791 DOI: 10.1210/jc.2015-2080] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Mitotane (o,p'-DDD), the only approved drug for advanced adrenocortical carcinoma (ACC), is a lipophilic agent that accumulates into circulating lipoprotein fractions and high-lipid-containing tissues. OBJECTIVE The aim of our study was to evaluate the in vivo and in vitro biological implication of serum lipoproteins on pharmacological action of mitotane. Distribution and concentration of mitotane were studied in plasma and adrenal tissue samples from mitotane-treated patients. The effect of lipoprotein-bound or lipoprotein-free (LP-F) mitotane was analyzed on proliferation and apoptosis of human adrenocortical H295R cells. A retrospective study of patients with ACC treated or not with statins was also performed. RESULTS o,p'-DDD distribution among very low-density lipoprotein, low-density lipoprotein (LDL), high-density lipoprotein (HDL), and LP-F fractions obtained after plasma ultracentrifugation of 23 of mitotane-treated patients was widely distributed in each subfraction. A positive correlation was observed between mitotane levels in plasma and in LDL, HDL, but also LP-F compartment. Intratumor o,p'-DDD concentrations in five ACC samples of mitotane-treated patients were found to be independent of cholesterol transporter expression, scavenger receptors, and LDL receptors. In vitro studies showed significant higher antiproliferative and proapoptotic effects and higher cell and mitochondrial uptake of mitotane when H295R cells were grown in LP-F medium. Finally, retrospective study of an ACC cohort of 26 mitotane-treated patients revealed that statin therapy was significantly associated with a higher rate of tumor control. CONCLUSIONS Altogether, our in vitro and in vivo studies provided compelling evidence for a greater efficacy of LP-F mitotane. Patients with ACC may thus benefit from therapeutic strategies that aim to increase LP-F mitotane fraction.
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Affiliation(s)
- Ségolène Hescot
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Atmane Seck
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Maryse Guerin
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Florence Cockenpot
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Thierry Huby
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Sophie Broutin
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Jacques Young
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Angelo Paci
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Eric Baudin
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
| | - Marc Lombès
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche (INSERM UMR)-S 1185 (S.H., J.Y., E.B., M.L.), Le Kremlin-Bicêtre F-94276, France; Department of Nuclear Medicine and Endocrine Oncology (S.H., E.B.) and Department of Pharmacology (A.S., F.C., S.B., A.P., E.B.), Gustave Roussy, Villejuif F-94805, France; INSERM UMR-S Institute of Cardiometabolism and Nutrition/1166, (M.G., T.H.) Pitié-Salpetrière Hospital, Paris, F-75013, France; Department of Endocrinology (J.Y., M.L.), Centre Hospitalier Universitaire Bicêtre, Le Kremlin-Bicêtre F-94276, France
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11
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Jovelet C, Seck A, Mir O, Simasotchi C, Broutin S, Goffinet F, Bidart JM, Paci A, Gil S. Variation in transplacental transfer of tyrosine kinase inhibitors in the human perfused cotyledon model. Ann Oncol 2015; 26:1500-4. [PMID: 25851627 DOI: 10.1093/annonc/mdv172] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 10/21/2014] [Accepted: 03/25/2015] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The use of tyrosine kinase inhibitors (TKis) during pregnancy in humans remains rare, and little data are available on their transplacental passage. Erlotinib and gefitinib are the first-line targeted therapy in case of stage IV nonsmall-cell lung cancer with an EGFR-activating mutation. There are no data available regarding the comparative use of these TKis in pregnant patients. We aimed to compare the transplacental transfer of gefitinib, imatinib and erlotinib, using the ex vivo method of human perfused cotyledon, and to determine the placental accumulation of TKis. MATERIALS AND METHODS Term placentas were perfused after delivery with gefitinib, imatinib and erlotinib at targeted maternal concentrations around the steady-state plasma trough concentration (i.e. 500, 1000 and 1500 ng/ml, respectively). Samples from fetal and maternal circulations were collected in order to monitor TKis concentrations. Main transfer parameters such as fetal transfer rate (FTR), clearance index (CI) and placental uptake were assessed. RESULTS Mean FTR of gefitinib, imatinib and erlotinib were 16.8%, 10.6% and 31.4%, respectively. Mean CI of gefitinib, imatinib and erlotinib were 0.59, 0.48 and 0.93, respectively. Placental uptake in cotyledon was 0.030% %, 0.010% and 0.003% for gefitinib, imatinib and erlotinib, respectively, corresponding to a mean mass of 27.7 µg for gefitinib, 15.7 µg for imatinib and 6.8 µg for erlotinib. CONCLUSION The results suggest that TKis cross the placenta at therapeutic level. Particularly, erlotinib crosses the placenta at a higher rate than gefitinib or imatinib. All of them have a very low placental uptake. These data may suggest that gefitinib should be preferred to erlotinib for the treatment of pregnant woman with lung cancer harboring an EGFR-activating mutation, during the second and third trimesters of pregnancy.
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Affiliation(s)
- C Jovelet
- Translational Research Laboratory, Gustave Roussy, Villejuif
| | - A Seck
- Department of Pharmacology and Drug Analysis, Gustave Roussy, Villejuif
| | - O Mir
- Department of Cancer Medicine, Gustave Roussy, University of Paris Sud, Villejuif
| | | | - S Broutin
- Department of Pharmacology and Drug Analysis, Gustave Roussy, Villejuif
| | - F Goffinet
- PremUp Foundation, Paris Department of Gynaecology and Obstetrics, Teaching Hospital Cochin, Assistance Publique-Hôpitaux de Paris, DHU 'Risks in Pregnancy', University Paris Descartes, Paris
| | - J M Bidart
- Department of Medical Biology and Pathology, Gustave Roussy, Villejuif
| | - A Paci
- Department of Pharmacology and Drug Analysis, Gustave Roussy, Villejuif
| | - S Gil
- PremUp Foundation, Paris UMR-S 1139, INSERM, Paris Descartes University, Paris, France
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12
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Sylla A, Guéye M, Keita Y, Seck N, Seck A, Mbow F, Ndiaye O, Diouf S, Sall MG. [Dehydration and malnutrition as two independent risk factors of death in a Senegalese pediatric hospital]. Arch Pediatr 2015; 22:235-40. [PMID: 25612874 DOI: 10.1016/j.arcped.2014.11.024] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 10/07/2014] [Accepted: 11/11/2014] [Indexed: 11/25/2022]
Abstract
UNLABELLED Inpatient mortality is an indicator of the quality of care. We analyzed the mortality of under 5-year-old hospitalized children in the pediatric ward of Aristide Le Dantec Hospital for updating our data 10 years after our first study. METHODS We analyzed the data of the children hospitalized between 1 January and 31 December 2012. For each child, we collected anthropometric measurements converted to a z-score related to World Health Organization growth data. Logistic regression-generating models built separately with different anthropometric parameters were used to assess the risk of mortality according to children's characteristics. RESULTS Data from 393 children were included. The overall mortality rate was 10% (39/393). Using logistic regression, the risk factors associated with death were severe wasting (odds ratio [OR]=8.27; 95% confidence interval [95% CI]) [3.79-18], male gender (OR=2.98; 95% CI [1.25-7.1]), dehydration (OR=5.4; 95% CI [2.54-13.43]) in the model using the weight-for-height z-score; male gender (OR=2.5; 95% CI [1.11-5.63]), dehydration (OR=8.43; 95% CI [3.83-18.5]) in the model using the height-for-age z-score; male gender (OR=2.7; 95% CI [1.19-6.24]), dehydration (OR=7.5; 95% CI [3.39-16.76]), severe deficit in the weight-for-age z-score (OR=2.4; 95% CI [1.11-5.63]) in the model using the weight-for-age z-score; and male gender (OR=2.5; 95% CI [1.11-5.63]) and dehydration (OR=8.43; 94% CI [3.83-18.5]) in the last model with mid-upper arm circumference (MUAC). Dehydration and malnutrition were two independent risk factors of death. The protocols addressing dehydration and malnutrition management should be audited and performed systematically for each child's anthropometric measurements at admission.
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Affiliation(s)
- A Sylla
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal.
| | - M Guéye
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
| | - Y Keita
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
| | - N Seck
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
| | - A Seck
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
| | - F Mbow
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
| | - O Ndiaye
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
| | - S Diouf
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
| | - M G Sall
- Service universitaire de pédiatrie de l'université Cheikh Anta Diop de Dakar, BP 5593, Dakar-Fann, Sénégal
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13
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Hescot S, Paci A, Seck A, Slama A, Viengchareun S, Trabado S, Brailly-Tabard S, Al Ghuzlan A, Young J, Baudin E, Lombès M. The lack of antitumor effects of o,p'DDA excludes its role as an active metabolite of mitotane for adrenocortical carcinoma treatment. Discov Oncol 2014; 5:312-23. [PMID: 25026941 DOI: 10.1007/s12672-014-0189-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 07/03/2014] [Indexed: 01/26/2023] Open
Abstract
Mitotane (o,p'DDD) is the most effective treatment of advanced adrenocortical carcinoma (ACC) but its mechanism of action remains unknown. Previous studies suggested that o,p'DDA may represent the active metabolite of mitotane. We aimed at reevaluating the potential role and pharmacological effects of o,p'DDA. Functional consequences of o,p'DDA exposure were studied on proliferation, steroidogenesis, and mitochondrial respiratory chain in human H295R and SW13 adrenocortical cells. Mitotane and its metabolites were quantified using high-performance liquid chromatography combined to an ultraviolet detection in these cells treated with o,p'DDD or o,p'DDA and in human adrenal tissues. Dose-response curves up to 300 μM showed that, as opposed to o,p'DDD, o,p'DDA did not inhibit cell proliferation nor alter respiratory chain complex IV activity, gene expression nor induce mitochondrial biogenesis, oxidative stress, or apoptosis. However, whereas mitotane drastically decreased expression of genes involved in steroidogenesis, o,p'DDA slightly reduced expression of some steroidogenic enzymes and exerts weak anti-secretory effects only at high doses. While o,p'DDD concentration was significantly reduced by 40 % in H295R cell supernatants after 48 h incubation, o,p'DDA levels remained unchanged suggesting that o,p'DDA was not efficiently transported into the cells. o,p'DDA was not detected in cell homogenates or supernatants after 48 h exposure to o,p'DDD, consistent with the absence of o,p'DDA production in these models. Finally, unlike o'p'DDD, we found that o,p'DDA content was undetectable in two ACC and one normal adrenal gland of mitotane-treated patients, suggesting a lack of cellular uptake and in situ production. Our results demonstrate that o,p'DDD, but not o,p'DDA, induces functional alterations in adrenal cells.
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Affiliation(s)
- Ségolène Hescot
- Inserm U693, Fac Med Paris Sud, 63 rue Gabriel Péri, 94276, Le Kremlin-Bicêtre Cedex, France
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Fall C, Richard V, Dufougeray A, Biron A, Seck A, Laurent F, Breurec S. Staphylococcus aureus nasal and pharyngeal carriage in Senegal. Clin Microbiol Infect 2013; 20:O239-41. [PMID: 24707853 DOI: 10.1111/1469-0691.12385] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [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: 05/22/2013] [Revised: 09/02/2013] [Accepted: 09/02/2013] [Indexed: 11/28/2022]
Abstract
Nasal and pharyngeal swabs were collected from 132 patients admitted to the Principal Hospital in Dakar (Senegal), in January and February 2012. The prevalence of Staphylococcus aureus carriage was 56.1% (n = 74): 40.2% for pharyngeal samples and 36.4% for nasal samples. None of the isolates was methicillin-resistant. Carriage was independently associated with being female (p <0.01) and large households (≥15 members) (p 0.04). The luk-PV genes encoding Panton-Valentine leukocidin (PVL) were present in 26.2% of the isolates. These data highlight the importance of the oropharynx as a site of colonization, and the high prevalence of PVL-positive isolates in Senegal as compared with industrialized countries.
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Affiliation(s)
- C Fall
- Institut Pasteur, Unité de Bactériologie médicale et Environnementale, Dakar, Sénégal
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15
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Seck A, Guèye M, Dieng L, Mbodj EB, Ndiaye C, Seck MT, Lo AS, Ngom PI. [Correlations between colorimetric parameters of teeth, eyes and skin. Perspectives in the choice of tooth shade for complete denture]. Odontostomatol Trop 2013; 36:17-25. [PMID: 24380117] [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: 06/03/2023]
Abstract
Rehabilitation with complete denture include among other objectives, improvement of facial and dental esthetics. To these ends, the artificial teeth should mimic as far as possible, healthy and natural dentition. The main objective of this study was to investigate factors associated with tooth color among black African subjects. One hundred and two subjects (72 men and 30 women) were included in this investigation. The colorimetric parameters of their teeth as well as those of the conjunctiva of their eyes and skin were recorded from standardized photographs. Two software, Mesurim and Photoshop were used for that purpose. Univariate and linear regression analysis were run to assess the association between tooth color and the variables age, gender and colorimetric parameters of eyes and skin. It appears from the result of this study that tooth color was positively and significantly associated with age. Stepwise multiple regression analysis further revealed that tooth hue can be best predicted by a combination of skin complexion and brightness and eye lightness.
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Affiliation(s)
- A Seck
- Dpt odontologie, Faculté de médecine, de pharmacie et d'odontostomatologie Université Cheikh Anta Diop, Dakar, Sénégal
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16
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Harrois D, Breurec S, Seck A, Delauné A, Le Hello S, Pardos de la Gándara M, Sontag L, Perrier-Gros-Claude JD, Sire JM, Garin B, Weill FX. Prevalence and characterization of extended-spectrum β-lactamase-producing clinical Salmonella enterica isolates in Dakar, Senegal, from 1999 to 2009. Clin Microbiol Infect 2013; 20:O109-16. [PMID: 23992040 DOI: 10.1111/1469-0691.12339] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 07/03/2013] [Accepted: 07/14/2013] [Indexed: 11/29/2022]
Abstract
A total of 1623 clinical isolates of Salmonella belonging to 229 serotypes were received by the Senegalese Reference Center for Enterobacteria from January 1999 to December 2009. The most common serotypes were Enteritidis (19% of the isolates), Typhi (8%), Typhimurium (7%) and Kentucky (4%). A significant increase in the prevalence of resistance to amoxicillin (0.9% in 1999 to 11.1% in 2009) and nalidixic acid (0.9% in 1999 to 26.7% in 2009) was observed in non-typhoidal Salmonella serotypes. For critically important antibiotics, notably ciprofloxacin and extended-spectrum cephalosporins (ESCs), the rates of resistance were low: 0.3% and 0.5%, respectively. Seven ESC-resistant Salmonella strains and three additional ESC-resistant strains from Senegal (1990) and Mali (2007) were studied to identify the genetic basis of their antibiotic resistance. All ESC-resistant strains produced an extended-spectrum β-lactamase (ESBL). These were CTX-M-15 (n = 6; 2000-2008), SHV-12 (n = 3; 2000-2001) and SHV-2 (n = 1; 1990). A large IncHI2 ST1 pK29-like plasmid was found in six strains (three producing SHV-12 and three CTX-M-15), whereas IncN and IncF plasmids were found in three strains and one strain, respectively. The association of plasmid-mediated quinolone resistance (PMQR) genes qnrB1 and aac(6')-Ib-cr was found in four ESBL-producing strains, leading to decreased susceptibility and even full resistance to ciprofloxacin (MIC range 0.75-2 mg/L) despite the absence of mutations in the quinolone resistance-determining region (QRDR) of gyrA, gyrB, parC and parE. This association of ESBL and multiple PMQR mechanisms within the same strains is therefore a serious concern as it hampers the use of both ESCs and fluoroquinolones for severe Salmonella infections.
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Affiliation(s)
- D Harrois
- Institut Pasteur, Unité des Bactéries Pathogènes Entériques, Paris, France; Institut Pasteur de Dakar, Unité de Bactériologie Médicale et Environnementale, Dakar, Senegal
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17
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Seck A, Ramantanis P, Vuong J, Bendimerad DF, Lepers C, Benkelfat BE, Frignac Y. Analyzing the benefit of optical transmission systems based on Root Raised Cosine PS-QPSK and a flexible channel grid. Opt Express 2013; 21:10496-10501. [PMID: 23669907 DOI: 10.1364/oe.21.010496] [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: 06/02/2023]
Abstract
We numerically investigate the multi-channel transmission performance of Polarization Switched Quadrature Phase Shift Keying (PS-QPSK) and we compare it to the performance of Polarization-Division-Multiplexed QPSK (PDM-QPSK), using Root Raised Cosine (RRC) spectral shaping, in the context of a flexible channel grid. We point out the impact of the roll-off factor and the potential influence of different dispersion compensation scenarios. Finally, the advantage of PS-QPSK against PDM-QPSK is presented as a function of the system parameters, while we also discuss the benefit of a RRC spectral shaping against a tight filtering at the transmitter side with a 2nd order super-Gaussian-shaped filter.
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Affiliation(s)
- A Seck
- Institut Mines-Télécom/Télécom SudParis, CNRS UMR 5157 SAMOVAR, 9 rue Charles Fourier, 91011 EVRY, France
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18
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Sambe-Ba B, Seck A, Wane AA, Fall-Niang NK, Gassama-Sow A. [Sensitivity to antibiotics and genetic support to resistance of Shigella flexneri strains isolated in Dakar from 2001 to 2010]. ACTA ACUST UNITED AC 2013; 106:89-94. [PMID: 23483461 DOI: 10.1007/s13149-013-0283-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2012] [Accepted: 02/12/2013] [Indexed: 10/27/2022]
Abstract
Diarrheal diseases remain a leading cause of death with 14.7 million deaths in 2001 and 26% of global mortality worldwide according to WHO. Shigella species are prevalent in tropical areas; they are present all the year, with epidemic outbreaks in rainy season. Between 2001 and 2010 one hundred ninety (190) strains of Shigella flexneri isolated from National Senegalese Enterobacteriaceae Center located at the Pasteur Institute in Dakar were studied. Susceptibility was performed by antibiogram following the CASFM recommendations. Detection and characterization of integrons and resistance genes was done by PCR using specific primers and sequencing. Antibiotic susceptibility showed high percentage resistance to tetracycline: 95%, cotrimoxazole 60%, ampicillin 55%. Nineteen strains were cephalosporin resistant (10%). Two isolates were resistant to quinolones and one was imipenem resistant. Genes tet, dfr, cat, bla tem1 , bla oxa30 , bla shv , bla CTX-M , blakpc,bla IMP , gyrA, gyrB, parC and parE were detected on isolates. Integrons harbored genes resistance. The class 1 integron predominated followed by class 2 integron. Genes bla oxa30 , aadA1/aadA2 dfrA1, dfrA7 were found on class 1 integron. Class 2 integron showed three different types cassettes. No class 3 integron was detected. Genes dfrA1, dfrA7, sat, and aadA1 were harbouring by integrons. Antibiotic susceptibility showed that Shigella flexneri strains are resistant to the first line drugs used to treat shigellosis in Senegal. Resistance to 3rd generation of cephalosporins and fluoroquinolones emerged and is of great concern. These molecules must be used with caution in the treatment of shigellosis.
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Affiliation(s)
- B Sambe-Ba
- Institut Pasteur de Dakar, 36, avenue Pasteur, BP 220, Dakar, Sénégal
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19
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Berveiller P, Vinot C, Mir O, Broutin S, Deroussent A, Seck A, Camps S, Paci A, Gil S, Tréluyer JM. Comparative transplacental transfer of taxanes using the human perfused cotyledon placental model. Am J Obstet Gynecol 2012; 207:514.e1-7. [PMID: 23174392 DOI: 10.1016/j.ajog.2012.10.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 09/14/2012] [Accepted: 10/03/2012] [Indexed: 10/27/2022]
Abstract
OBJECTIVES The use of taxanes (paclitaxel and docetaxel) in pregnant cancer patients is increasing. We aimed to compare their transplacental transfer using the gold standard human placental perfusion model, to guide drug selection. STUDY DESIGN Term placentas were perfused with paclitaxel or docetaxel and 2 different albumin concentrations. Main transfer parameters such as fetal transfer rate (FTR), clearance index, and placental uptake of taxanes were assessed. RESULTS Twelve placentas were perfused, 6 with paclitaxel and 6 with docetaxel. Mean FTR of paclitaxel decreased significantly from 5.67 ± 0.02% in low albumin conditions to 1.72 ± 0.09% in physiological albumin conditions. Similarly, mean clearance index decreased significantly from 0.22 ± 0.02 to 0.09 ± 0.01. Regarding docetaxel, mean FTR were similar in low albumin and physiological conditions (5.03 ± 0.60% and 4.04 ± 0.22%, respectively) while mean clearance index decreased significantly from 0.18 ± 0.02 to 0.13 ± 0.01. Taxanes accumulation in cotyledon was similar for docetaxel and paclitaxel: 4.54 ± 1.84% vs 3.31 ± 1.88%, respectively. CONCLUSION Transplacental transfer and placental accumulation of paclitaxel and docetaxel were low and similar, especially in physiological conditions of albumin. Further studies are warranted to optimize the selection of a taxane in pregnant cancer patients.
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Breurec S, Michel R, Seck A, Brisse S, Côme D, Dieye FB, Garin B, Huerre M, Mbengue M, Fall C, Sgouras DN, Thiberge JM, Dia D, Raymond J. Clinical relevance of cagA and vacA gene polymorphisms in Helicobacter pylori isolates from Senegalese patients. Clin Microbiol Infect 2011; 18:153-9. [PMID: 21722260 DOI: 10.1111/j.1469-0691.2011.03524.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The molecular epidemiology of Helicobacter pylori in Africa is poorly documented. From January 2007 to December 2008, we investigated 187 patients with gastric symptoms in one of the main tertiary hospitals in Dakar, Senegal. One hundred and seventeen patients were culture-positive for H. pylori. Polymorphisms in vacA and cagA status were investigated by PCR; the 3'-region of cagA was sequenced, and EPIYA motifs were identified. Bacterial heterogeneity within individuals was extensively assessed by using an approach based on vacA and cagA heterogeneity. Fourteen per cent of H. pylori-positive patients displayed evidence of mixed infection, which may affect disease outcome. Patients with multiple vacA alleles were excluded from subsequent analyses. Among the final study population of 105 patients, 29 had gastritis only, 61 had ulcerated lesions, and 15 had suspicion of neoplasia based on endoscopic findings. All cases of suspected neoplasia were histologically confirmed as gastric cancer (GC). The cagA gene was present in 73.3% of isolates. CagA proteins contained zero (3.7%), one (93.9%) or two (2.4%) EPIYA-C segments, and all were western CagA. Most of the isolates possessed presumed high-vacuolization isotypes (s1i1m1 (57.1%) or s1i1m2 (21.9%)). Despite the small number of cases, GC was associated with cagA (p 0.03), two EPIYA-C segments in the C-terminal region of CagA (p 0.03), and the s1 vacA allele (p 0.002). Multiple EPIYA-C segments were less frequent than reported in other countries, possibly contributing to the low incidence of GC in Senegal.
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Affiliation(s)
- S Breurec
- Institut Pasteur, Unité de Biologie Médicale et Environnementale, Dakar, Senegal.
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21
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Deroussent A, Rodriguez S, Martelli S, Seck A, Dubus-Daudigeos E, Desmaële D, Vassal G, Paci A. Quantification of dimethyl-ifosfamide and its N-deschloropropylated metabolites in mouse plasma by liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:743-50. [PMID: 21377940 DOI: 10.1016/j.jchromb.2011.02.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2010] [Revised: 02/05/2011] [Accepted: 02/07/2011] [Indexed: 11/15/2022]
Abstract
Among antitumor oxazaphosphorine drugs, the prodrug ifosfamide (IFO) and its analogs require metabolic activation by specific liver cytochrome P450 (CYP) enzymes to become therapeutically active. New 7,9-dimethyl-ifosfamide analogs have shown greater cytotoxic activity than IFO, whereas side-chain oxidation still occurred leading to monochloroacetone after N-dechloropropylation. A sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) assay was developed and validated for the simultaneous quantitation of the prodrug 7S,9S-dimethyl-ifosfamide (diMeIFO) and its two inactive metabolites, N(2)- and N(3)-deschloropropyl-dimethylifosfamide (N(2)-DCP-diMeIFO and N(3)-DCP-diMeIFO) in mouse plasma. After protein precipitation with methanol, the analytes were separated by isocratic reversed-phase chromatography with (methanol/ammonium formate pH 5.5, 60:40, v/v) and detected by tandem mass spectrometry using multiple reaction monitoring of transitions ions m/z 289→168 for diMeIFO, m/z 213→168 for N(2)-DCP-diMeIFO, m/z 213→92 for N(3)-DCP-diMeIFO and m/z 261→154 for IFO (internal standard). The calibration curves were linear over the concentration range of 20-10,000ng/mL for the three analytes. Mean extraction recoveries from mouse plasma were 99, 96, 99 and 100% for diMeIFO, N(2)-DCP-diMeIFO, N(3)-DCP-diMeIFO and IFO, respectively. The lower limit of quantitation for diMeIFO and its metabolites was 20 ng/mL in 50 μL plasma. The method was accurate with calculated bias from -5.8 to 4.0% for diMeIFO, from -1.1 to 10.6% for N(2)-DCP-diMeIFO and from -6.9 to 9.8% for N(3)-DCP-diMeIFO, and precise with coefficients of variation lower than 6.8%, 7.8% and 14.3%, respectively. The assay was successfully applied to a preliminary pharmacokinetic study of diMeIFO and of its metabolites in mice.
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Affiliation(s)
- Alain Deroussent
- CNRS UMR 8203, Vectorologie et Thérapeutiques Anticancéreuses, Université Paris XI, Institut de Cancérologie Gustave Roussy, IRCIV, Villejuif, France.
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22
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Dia D, Seck A, Mbengue M, Bassène ML, Breurec S, Fall B, Fall C, Diouf ML. [Helicobacter pylori and gastroduodenal lesions in Dakar, Senegal]. Med Trop (Mars) 2010; 70:367-370. [PMID: 22368935] [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: 05/31/2023]
Abstract
INTRODUCTION The bacteriological characteristics of Helicobacter pylori (HP) vary in function of time and place. The aim of this study was to update histological and bacteriological feature of HP infection in patients presenting gastroduodenal lesions in Dakar, Senegal. PATIENTS AND METHOD This prospective study included patients with gastroduodenal lesions managed over a 6-month period in a digestive endoscopy center in Dakar. In all cases gastric biopsy was performed to obtain specimens for histological diagnosis according Sydney modified classification and HP culture with antibiogram. RESULTS A total of 158 patients were included. Mean patient age was 48.7 years and the sex-ratio was 1.2. Endoscopic lesions were ulcer in 88 cases, gastritis in 54 cases and tumors in 16. Histological examination demonstrated chronic gastritis in 100% of cases, inflammatory activity in 79.1%, metaplasia in 78.5%, gastric atrophy in 41.1%, adenocarcinoma in 7.6%, dysplasia in 5.7%, and MALT lymphoma in 2.5% with presence of HP in 72.8% of cases. Cultures were positive for HP in 65.8% of cases. Antibiograms indicated that HP was sensitive to amoxicilline in 100% of cases, clarithromycine in 96.6%, ciprofloxacine in 84.1%, and métronidazole in 29.5%. CONCLUSION Chronic gastritis is a constant feature of gastroduodenal lesions in Dakar. Histology combined with culture showed HP infection in 78.5% of cases. The antibiotic sensitivity of HP in Dakar has changed over the past decade.
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Affiliation(s)
- D Dia
- Service d'hépato-gastroentérologie, CHU Aristide Le Dantec, Dakar, Sénégal.
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23
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Rao P, Pascale F, Seck A, Teriitheau C, Namur J, Deschamps F, Paci A, Willis S, De Baère T. Evaluation des modes d’administration d’irinotecan sur modeles VX2 lapin : etude de pharmacocinetique et reponse tumorale. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s0221-0363(09)75500-3] [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: 10/19/2022]
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24
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Mbengue M, Seck A, Dia D, Diouf ML, Ka MM, Boye CS, Mboup S, Moreira Diop T. [Gastroduodenal peptic ulcer: descriptive study]. Dakar Med 2003; 48:176-80. [PMID: 15776626] [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: 05/02/2023]
Abstract
Our goals were to describe the epidemiological, clinical and endoscopic aspects of gastrointestinal ulcer and to determine the frequency of H. pylori, we included 140 gastrointestinal peptic ulcers from January 1999 to June 2000. Diagnosis of ulcerous disease delt with the presence of an ulcer discovered during a high digestive endoscopy. Gastro-duodenal ulcers bleeding or with stenosis have been excluded as well as patients who were under anticoagulant treatment or antibiotics or under pump of protons inhibitors during the previous month. Data were collected from a unique questionnaire specifying the sociodemographic characteristic, the history of the ulcerous disease, the antecedents, the style of life, and the endoscopic findings. Five biopsies were done using sterile grips and a fast urease test and the direct exam of the smear. The prevalence of gastro-duodenal ulcers in our population of survey was 6.2%. One hundred twenty eight duodenal ulcers (91.4%), and 12 gastric ulcers (8.6%) were found. The average of age was of 37.1 years +/- 15.3. The sex ratio was 2.9. The gastro-duodenal disease had begun for more than 5 years at 40.8%. No difference in the characters of the pain and signs has been found between duodenal and gastric localization of the ulcer. Hp was associated in 91.4% (91.4% when duodenal ulcers, 88.9% when gastric ulcers and all gastric and duodenal ulcers). We conclude that gastrointestinal ulcers occupies an important place in our gastroenterological practice and the infection rate with H. pylori infection is so high during gastro-duodenal ulcers in our country that the eradication of Hp could be proposed in any case of gastro-duodenal ulcer diagnosed by endoscopy.
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Affiliation(s)
- M Mbengue
- Clinique médicale, Hôpital Aristide Le Dantec de Dakar, BP 6243 Sénégal.
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25
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Seck A. [AIDS in Senegal, a public health world challenge]. Soins 2001:46-7. [PMID: 12008605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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26
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Seck A. [Awa Seck. Nurse, director and woman leader. Interview by Odile Lamy and Colette Pilon-Bergman]. Infirm Que 2000; 8:14-7. [PMID: 11885457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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27
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Diouf ML, Diouf B, Niang A, Ka EH, Pouye A, Seck A, Raphenon G, Moreira-Diop T. [Prevalence of hepatitis B and C viruses in a chronic hemodialysis center in Dakar]. Dakar Med 2000; 45:1-4. [PMID: 14666779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
In endemic areas of hepatitis B and C, hemodialysis patients are highly exposed to these infections. So the authors studied the prevalence of hepatitis B and C viruses among chronic hemodialysis patients of CHU A. Le Dantec of Dakar in a cross study carried out from June 1996 to June 1997, in order to identify risk factors and suggest appropriate prophylaxis. The study concerned fifteen chronic hemodialysis patients in an unit of hemodialysis in Dakar. For each patient, clinical and biochemical data were collected serological markers of B and C viruses were tested and HCV-RNA in case of seropositivity to C virus. The mean age of patients were 48 years and average duration of hemodialysis was 40 months. Hepatic injury was silent in all cases. Only one patient (6.7%) was AgHBs carrier while 9 patients (60%) were positive for antibodies anti HBs without previous hepatitis B vaccine. Twelve patients (80%) were found to be HCV-antibody positive and half of them were HCV. RNA positive. Average value of alanine amino transferase was higher in HCV-viremic patients than in seropositive but non viremic patients, although normal. Genotype 2 ac was found in 3 HCV viremic patients but it could not be determined in 3 other patients. Hemodialysis duration and number of blood transfusions were found to be risk factors of HCV infection. The high prevalence of HCV seropositivity among chronic hemodialysis patients in Dakar has led to strengthen precautions in our hemodialysis unit. HCV serological screening in blood donors is advocated.
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Affiliation(s)
- M L Diouf
- Clinique Médicale I CHU A. Le Dantec Dakar
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28
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Diouf ML, Diouf B, Seck A, Raphenon G, Moreira-Diop T. [Hepatitis C virus genotypes among chronic hemodialysis patients in Dakar]. Gastroenterol Clin Biol 1999; 23:1261-2. [PMID: 10651539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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29
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Khati C, Stevanin G, Durr A, Chneiweiss H, Belal S, Seck A, Cann H, Brice A, Agid Y. Genetic heterogeneity of autosomal dominant cerebellar ataxia type 1: clinical and genetic analysis of 10 French families. Neurology 1993; 43:1131-7. [PMID: 8170557 DOI: 10.1212/wnl.43.6.1131] [Citation(s) in RCA: 15] [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: 01/29/2023] Open
Abstract
We performed linkage analysis between the gene responsible for spinal cerebellar ataxia 1 (SCA1) and the highly polymorphic chromosome 6 locus, D6S89, in 10 French families with autosomal dominant cerebellar ataxia (ADCA) type 1. These families were clinically indistinguishable except for one family with loss of hearing and vision. Very close linkage was observed in four families, with no evidence of recombination between SCA1 and D6S89. Linkage with D6S89 was excluded in the six others, thus demonstrating genetic heterogeneity for ADCA type 1. The D6S89 marker, which is very closely linked to the disease locus, can be used to identify SCA1 families and will lead to predictive testing.
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Affiliation(s)
- C Khati
- Unité Inserm 289, Hôpital de la Salpêtrière, Paris, France
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30
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Abstract
Heart involvement is frequent in Friedreich's ataxia (FA), the most prevalent of the spino-cerebellar degenerative diseases, which is inherited with an autosomal recessive pattern. However, the pathophysiological link between cardiac and neurological disorders is not yet clearly established. We compared a group of 10 patients with FA to a control group (C) of 16 normal subjects, using Doppler-echocardiography. To see whether cardiac involvement was specific to FA, the data of patients with FA were also compared to those of patients with autosomal dominant olivo-ponto-cerebellar atrophia (OPCA), another spino-cerebellar degenerative disease. There was an increase in left ventricular mass index in FA (154 +/- 9 g.m-2 vs 99 +/- 7 g. m-2 in C, P < 0.001), systolic function was normal, the ejection fraction (EF) slope and E/A ratio were decreased (85 +/- 9 mm.s-1 vs 130 +/- 7 mm.s-1 in C, P < 0.001 and 1.5 +/- 0.1 vs 1.7 +/- 0.1 in C, P < 0.01, respectively), while the isovolumic relaxation period was increased (96 +/- 3 ms vs 92 +/- 2 ms in C, P < 0.01). Deceleration time and time-velocity integrals of A wave to total mitral flow were not modified. In OPCA only the E/A ratio was decreased (1.5 +/- 0.1 vs 1.7 +/- 0.1 in C, P < 0.05). These data show the presence of cardiomyopathy in FA with left ventricular hypertrophy and suggest the presence of diastolic function abnormalities. The cardiomyopathy seems specifically associated with FA and not to spino-cerebellar degenerative disease in general.
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Affiliation(s)
- D Morvan
- Service de Cardiologie, INSERM U.289, Hôpital Pitié-Salpêtrière, Paris, France
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Chavoix C, Samson Y, Pappata S, Prenant C, Mazière M, Seck A, Agid Y. Positron emission tomography study of brain benzodiazepine receptors in Friedreich's ataxia. Neurol Sci 1990; 17:404-9. [PMID: 2177374 DOI: 10.1017/s0317167100030973] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Central type benzodiazepine receptors were studied in 9 patients with Friedreich's ataxia and 12 healthy subjects using positron emission tomography (PET) and [11C]Ro 15-1788, a specific antagonist of the central type benzodiazepine receptors, as radioligand. A standard PET procedure was used in 5 patients and 8 controls to obtain brain kinetics of the total binding of the radioligand. The remaining subjects were intravenously injected with a saturating dose of unlabeled Ro 15-1788, 30 minutes after the tracer injection, to determine the nondisplaceable binding of [11C]Ro 15-1788. A semi-quantitative method was used to quantify the [11C]Ro 15-1788 data. None of the quantification indices in the cerebellar hemispheres, or in the other brain areas investigated, was significantly modified in patients with Friedreich's ataxia. These findings suggest that brain benzodiazepine receptors are unaffected in Friedreich's ataxia.
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Affiliation(s)
- C Chavoix
- Département de Biologie, Hôpital d'Orsay, France
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Fujita R, Agid Y, Trouillas P, Seck A, Tommasi-Davenas C, Driesel AJ, Olek K, Grzeschik KH, Nakamura Y, Mandel JL, Hanauer A. Confirmation of linkage of Friedreich ataxia to chromosome 9 and identification of a new closely linked marker. Genomics 1989; 4:110-1. [PMID: 2563350 DOI: 10.1016/0888-7543(89)90323-6] [Citation(s) in RCA: 50] [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: 01/01/2023]
Abstract
A linkage analysis with chromosome 9 markers was performed in 33 families with Friedreich ataxia (FA). Linkage with D9S15, previously established by S. Chamberlain et al. (1988, Nature London 334:248-249) was confirmed in our sample (z(theta) = 6.82 at theta = 0.02) while INFB (interferon-beta gene) shows looser linkage. An additional marker, D9S5, was also shown to be closely linked to FA (z(theta) = 5.77 at theta = 0.00).
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Affiliation(s)
- R Fujita
- U.184 INSERM, Laboratoire de Génétique Moléculaire des Eucaryotes du CNRS, Faculté de Médecine, Strasbourg, France
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Söling HD, Seck A. Precursor specific inhibition of hepatic gluconeogenesis by glisoxepide, an inhibitor of the L-aspartate/L-glutamate antiport system. FEBS Lett 1975; 51:52-9. [PMID: 235462 DOI: 10.1016/0014-5793(75)80853-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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