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Laurent J, Diop M, Amara R, Fisson C, Armengaud J, Labadie P, Budzinski H, Couteau J, Maillet G, Le Floch S, Laroche J, Pichereau V. Relevance of flounder caging and proteomics to explore the impact of a major industrial accident caused by fire on the Seine estuarine water quality. Mar Pollut Bull 2024; 201:116178. [PMID: 38401391 DOI: 10.1016/j.marpolbul.2024.116178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 02/11/2024] [Accepted: 02/16/2024] [Indexed: 02/26/2024]
Abstract
On September 26th 2019, a major fire occurred in the Lubrizol factory located near the Seine estuary, in Rouen-France. Juvenile flounders were captured in the Canche estuary (a reference system) and caged one month in the Canche and in the Seine downstream the accident site. No significant increases of PAHs, PCBs and PFAS was detected in Seine vs Canche sediments after the accident, but a significant increase of dioxins and furans was observed in water and sewage sludge in the Rouen wastewater treatment plant. The proteomics approach highlighted a dysregulation of proteins associated with cholesterol synthesis and lipid metabolism, in fish caged in the Seine. The overall results suggested that the fire produced air borne dioxins and furans that got deposited on soil and subsequently entered in the Seine estuarine waters via runoff; thus contaminating fish preys and caged flounders in the Seine estuary.
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Affiliation(s)
- Jennifer Laurent
- Univ Brest - CNRS - IRD - Ifremer, UMR 6539 LEMAR, IUEM-Université de Bretagne Occidentale, Rue Dumont D'Urville, 29280 Plouzané, France; CEDRE, 715 rue Alain Colas, 29200 Brest, France.
| | - Mamadou Diop
- Univ. Littoral Côte d'Opale, Univ. Lille, CNRS, IRD, UMR 8187, LOG, Laboratoire d'Océanologie et de Géosciences, F-62930 Wimereux, France
| | - Rachid Amara
- Univ. Littoral Côte d'Opale, Univ. Lille, CNRS, IRD, UMR 8187, LOG, Laboratoire d'Océanologie et de Géosciences, F-62930 Wimereux, France
| | - Cédric Fisson
- GIP Seine-Aval, Hangar C - Espace des Marégraphes, CS 41174, 76176 Rouen Cedex 1, France
| | - Jean Armengaud
- Laboratoire Innovations Technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRAe, F-30207 Bagnols-sur-Cèze, France
| | - Pierre Labadie
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France
| | - Hélène Budzinski
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France
| | - Jérôme Couteau
- TOXEM, 12 rue des 4 saisons, 76290 Montivilliers, France
| | | | | | - Jean Laroche
- Univ Brest - CNRS - IRD - Ifremer, UMR 6539 LEMAR, IUEM-Université de Bretagne Occidentale, Rue Dumont D'Urville, 29280 Plouzané, France
| | - Vianney Pichereau
- Univ Brest - CNRS - IRD - Ifremer, UMR 6539 LEMAR, IUEM-Université de Bretagne Occidentale, Rue Dumont D'Urville, 29280 Plouzané, France.
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Delor L, Louzon M, Pelosi C, Michel E, Maillet G, Carronnier H. Ecotoxicity of single and mixture of perfluoroalkyl substances (PFOS and PFOA) in soils to the earthworm Aporrectodea caliginosa. Environ Pollut 2023; 335:122221. [PMID: 37543076 DOI: 10.1016/j.envpol.2023.122221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/30/2023] [Accepted: 07/16/2023] [Indexed: 08/07/2023]
Abstract
Per and polyfluoroalkyl substances (PFAS) are persistent compounds that are massively used in industry, consumer goods and fire-fighting foams. Soil contamination by PFAS is a major environmental concern, and there is a lack of knowledge on both their ecotoxicological mechanisms and the concentrations that induce adverse effects especially to non-target organisms, particularly in the case of PFAS mixtures. This study contributes to filling these gaps by assessing and modelling the effects of PFAS (in single and in mixtures for PFOS and PFOA at different environmental doses) on juvenile endogeic earthworms of a common species in European soils (Aporrectodea caliginosa) at different levels of biological organization (sub-individual and individual). The results showed for the first time combined strong ecotoxicological effects of PFAS on earthworm survival, integumental integrity, growth, sexual maturity and on genomic stability notably with the induction of DNA breaks associated with no abnormal oxidative DNA-lesion levels. Our results demonstrated significant effects at 0.3 mg kg-1 and additive effects in case of mixtures.
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Affiliation(s)
- L Delor
- VALGO, 47 Rue de Ponthieu, 75008, Paris, France
| | - M Louzon
- Ecosystem Department, ENVISOL, 2 Rue Hector Berlioz, 38110, La Tour Du Pin, France
| | - C Pelosi
- UMR INRAE/Avignon Université EMMAH (Environnement Méditerranéen et Modélisation des Agrohydrosystèmes), 228 Route de l'Aérodrome, 84000, Avignon, France
| | - E Michel
- UMR INRAE/Avignon Université EMMAH (Environnement Méditerranéen et Modélisation des Agrohydrosystèmes), 228 Route de l'Aérodrome, 84000, Avignon, France
| | - G Maillet
- TOXEM, 12 Rue des Quatre Saisons, 76290, Montivilliers, France
| | - H Carronnier
- VALGO, 47 Rue de Ponthieu, 75008, Paris, France.
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Petit G, Maillet G, Nault-Horvath E, Stewart C, O'Sullivan T. The Lac-Mégantic Photovoice Initiative. Eur J Public Health 2017. [DOI: 10.1093/eurpub/ckx186.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- G Petit
- University of Sherbrooke/Department of Public Health Estrie, Lac-Méantic, Canada
| | - G Maillet
- University of Sherbrooke/Department of Public Health Estrie, Lac-Méantic, Canada
| | | | - C Stewart
- Department of Public Health Estrie, Lac-Mégantic, Canada
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Lenormand C, Couteau J, Nouhaud FX, Maillet G, Bou J, Gobet F, Pfister C. Predictive Value of NRAMP1 and HGPX1 Gene Polymorphism for Maintenance BCG Response in Non-muscle-invasive Bladder Cancer. Anticancer Res 2016; 36:1737-1743. [PMID: 27069153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 01/29/2016] [Indexed: 06/05/2023]
Abstract
AIM To assess the potential predictive value of natural resistance-associated macrophage protein 1 (NRAMP1) and human glutathione peroxidase 1 (hGPX1) polymorphism in non-muscle-invasive bladder cancer treated with bacillus Calmette-Guerin (BCG) instillation, we conducted an original ancillary multicenter study. PATIENTS AND METHODS We evaluated patients included in the multicenter URO-BCG 4 trial, who received three weekly instillations of one-third dose BCG every 6 months (group I) or two weekly instillations every 3 months (group II) for 3 years. For clinical evaluation we also evaluated tumor recurrence and muscle progression. NRAMP1 and hGPX1 polymorphism analyses were performed on blood DNA. NRAMP1 exon 15 and hGPX1 exon 1c were amplified using Type-it Microsatellite PCR Kit® for multiplex polymerase chain reaction. RESULTS From June 2004 to April 2010, 146 randomized patients were included in this retrospective study. Blood samples were obtained from 107 patients. With 36 months of follow-up, 13.6% of patients had a tumor recurrence and muscle-invasive progression was observed in 4.3% of patients. Concerning NRAMP1 D543N polymorphism, patients with allele A had no tumor recurrence or muscle-invasive progression. No significant difference was observed in gene polymorphism distribution between groups I and II. Moreover, we did not observe any significant association of gene polymorphisms, tumor recurrence or muscle-invasive progression, event time and disease-free survival. CONCLUSION Our results suggest that no significant difference was found for NRAMP1 and hGPX1 gene polymorphisms associated with recurrence time, muscle invasion frequency and disease-free survival, nevertheless, we observed that the NRAMP1 D543N GG genotype group had a shorter time to tumor recurrence.
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Affiliation(s)
| | - Jérôme Couteau
- BioTechnology Laboratory, Science and Technology University, Le Havre, France
| | | | - Géraldine Maillet
- BioTechnology Laboratory, Science and Technology University, Le Havre, France
| | - Jacqueline Bou
- Department of Genetics, Rouen University Hospital, Rouen, France
| | - Françoise Gobet
- Department of Pathology, Rouen University Hospital, Rouen, France
| | - Christian Pfister
- Department of Urology, Rouen University Hospital, Rouen, France Clinical Investigation Center, Inserm 6204, Onco-Urology Group, Rouen, France
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Noel N, Maillet G, Couteau J, Minier C, Pfister C. Recherche combinée des mutations de FGFR3 et p53 dans la tumeur vésicale et les urines (résultats préliminaires). Prog Urol 2012. [DOI: 10.1016/j.purol.2012.08.233] [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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Noël N, Couteau J, Maillet G, Gobet F, d'Aloisio F, Minier C, Pfister C. [Preliminary study of p53 and FGFR3 gene mutations in the urine for bladder tumors]. Prog Urol 2012; 23:29-35. [PMID: 23287481 DOI: 10.1016/j.purol.2012.09.015] [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: 07/19/2012] [Revised: 07/27/2012] [Accepted: 09/17/2012] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Two major pathways are described in bladder carcinogenesis: one for invasive or high grade tumors characterized by alteration of the p53 tumor suppressor gene and the other for non-invasive tumors or low grade involving mutations FGFR3. The objective of our study was to validate the research in the urine of mutations in these two genes in patients with a bladder tumor. PATIENTS AND METHODS In our preliminary study, we investigated 36 patients the FGFR3 and p53 mutations in tumors and urine collected during endoscopic resection. The p53 mutations were sought in FASAY, which allows a functional analysis of the protein P53. The FGFR3 mutations were sought in SNaPshot that searches the eight most frequent mutation points of this gene. RESULTS For 24 patients (66% of cases), we found at least one of the two mutations in the tumor. This mutation was present in the urine in 15 patients (sensitivity=62.5%). In only one patient, we found a mutation in the urinary sediment that did not exist in the tumor (specificity=91.7%). CONCLUSION The search for mutations of p53 and FGFR3 in the urine was a simple and non-invasive assay, which seems superior to urinary cytology for the detection of bladder tumors, raising hopes of an interest in this bio-assay for surveillance of bladder tumors and screening risk populations.
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Affiliation(s)
- N Noël
- Service d'urologie, CHU Charles-Nicolle, 1, rue de Germont, 76031 Rouen, France
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Cailleaud K, Maillet G, Budzinski H, Souissi S, Forget-Leray J. Effects of salinity and temperature on the expression of enzymatic biomarkers in Eurytemora affinis (Calanoida, Copepoda). Comp Biochem Physiol A Mol Integr Physiol 2007; 147:841-9. [PMID: 17126575 DOI: 10.1016/j.cbpa.2006.09.012] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [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: 07/21/2006] [Revised: 09/24/2006] [Accepted: 09/26/2006] [Indexed: 11/25/2022]
Abstract
In order to establish effective enzymatic biomarkers that could provide in situ early warning of contaminant exposure in estuarine ecosystems, the potential effects of the principal abiotic factors (temperature and salinity) were investigated on common biomarkers, the acetylcholinesterase (AChE) and the glutathione S-transferase (GST) in Eurytemora affinis. Short term salinity stress effects simulated during an experimental tide indicated that enzymatic activities of this species are characterized by maximum expression related to an optimal salinity range (between 5 and 15 psu). Moreover, longer time exposure to various salinity tanks confirmed the effects of this factor on both AChE and GST activities. Therefore, optimal AChE activity was measured at 10 psu, while optimal GST activity was measured at 5 psu. Furthermore, significant effects of temperature were also recorded, particularly for AChE expression (slight effects were measured on GST expression) with an optimal condition at 11 degrees C. These experiments indicated a more pronounced effect of salinity over temperature especially on the AChE expression and confirmed the need to standardize sampling procedures in relation with environmental parameters for biomonitoring studies based on enzymatic analyses.
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Affiliation(s)
- K Cailleaud
- Université Bordeaux 1, CNRS, LPTC-UMR 5472 (Laboratory of Physico- and Toxico-Chemistry), 351 crs de la Libération, 33405 Talence, France
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Maillet G, White CI, Gallego ME. Telomere-length regulation in inter-ecotype crosses of Arabidopsis. Plant Mol Biol 2006; 62:859-66. [PMID: 16941208 DOI: 10.1007/s11103-006-9061-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Accepted: 07/17/2006] [Indexed: 05/11/2023]
Abstract
Telomeres, the nucleoprotein complexes at the ends of eukaryotic chromosomes, are maintained at a species-specific equilibrium length. Arabidopsis thaliana is a self-fertilizing plant and different geographical isolates or ecotypes show differing telomere-lengths. We have exploited this telomere-length polymorphism between Arabidopsis ecotypes to investigate the genetic regulation of telomere length by analysing telomere lengths in 16 different inter-ecotype crosses between plants with differing telomere sizes. With two exceptions, the inter-ecotype hybrid plants present a new telomere-length set point, intermediate between that of the two parents. A regulation mechanism thus shortens the longer and lengthens the shorter telomeres.
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Affiliation(s)
- G Maillet
- CNRS UMR6547, Université Blaise Pascal, 24, avenue des Landais, 63177, Aubiere, France
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Maillet G, Féral C, Benhaïm A. [Apoptosis of the follicular cells: its implication in ovarian induction protocols]. ACTA ACUST UNITED AC 2005; 33:653-8. [PMID: 16137911 DOI: 10.1016/j.gyobfe.2005.06.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2005] [Accepted: 06/13/2005] [Indexed: 10/25/2022]
Abstract
Atresia, a degenerative process through which many follicles are removed from the grown pool of follicles involves apoptotic changes in the follicular cells. This review analyses the endocrine regulation of apoptotic cell death in ovarian follicle. FSH is the major survival factor for preovulatory follicle but follicle integrity, in vitro, was necessary to its action on granulosa cell. The role of LH is more ambivalent. FSH and LH exert their activity via activation of the cAMP signal. High levels of intracellular cAMP could enhance steroidogenesis and in the same time induce apoptosis in granulosa cells. Moreover, no correlation between steroidogenesis and apoptosis can be established. During ovarian stimulation in IVF protocol, the use of LH, of coasting and of GnRH agonists and antagonists could be deleterious in follicle survival.
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Affiliation(s)
- G Maillet
- EA 2608-USC Inra, IBFA, sciences C, université de Caen, esplanade de la Paix, 14033 Caen, France
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Marin M, Poret A, Maillet G, Leboulenger F, Le Foll F. Regulation of volume-sensitive Cl- channels in multi-drug resistant MCF7 cells. Biochem Biophys Res Commun 2005; 334:1266-78. [PMID: 16039989 DOI: 10.1016/j.bbrc.2005.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2005] [Accepted: 07/07/2005] [Indexed: 11/22/2022]
Abstract
The P-glycoprotein (P-gp) is thought to be involved in the regulation of volume-sensitive chloride channels. In this study, the possible coupling between P-gp and swelling-activated chloride channels has been examined in MCF7 cells with sensitive (MDR-), resistant (MDR+), and reversed resistant (MDR(REV)) phenotypes. Western blot analysis showed that incubation of cells with doxorubicin induced P-gp expression in a reversible manner. Exposure of MDR+ cells to hypotonicity resulted in an inhibition of P-gp activity while hypotonic challenges induced swelling-activated chloride currents (I(Cl-swell)) in MDR-, MDR+, and MDR(REV) MCF7 cells. While verapamil inhibited I(Cl-swell) in all cell types, doxorubicin and vincristine rapidly and reversibly inhibited I(Cl-swell) uniquely in MDR+. Intracellular dialysis of MDR+ cells with C219 anti-P-gp antibody abolished the sensitivity of I(Cl-swell) to doxorubicin and led to a response pattern very close to that of MDR- cells. Taken together, these results strongly suggest that the P-glycoprotein regulates I(Cl-swell) in resistant MCF7.
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Affiliation(s)
- Matthieu Marin
- Laboratory of Ecotoxicology UPRES-EA 3222, IFRMP 23, University of Le Havre, 25 rue Philippe Lebon, 76058 Le Havre cedex, France.
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Maillet G, Benhaim A, Mittre H, Feral C. Involvement of theca cells and steroids in the regulation of granulosa cell apoptosis in rabbit preovulatory follicles. Reproduction 2003. [DOI: 10.1530/rep.0.1250709] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Follicular atresia is characterized by a rapid loss of granulosa cells and, to a lesser extent, theca cells, via apoptosis. The aim of this study was to investigate the possible involvement of theca cell secretions in the regulation of apoptosis of rabbit granulosa cells. The annexin-V binding method based on externalization of phosphatidylserine to the outer layer of plasma membrane during apoptosis was used to detect apoptotic granulosa cells in flow cytometry. Regulation of apoptosis of granulosa cells was studied in three different culture systems: (i) isolated cultured granulosa cells, (ii) granulosa cells obtained from cultured preovulatory follicles and (iii) granulosa cells co-cultured with theca cells. The results of this study indicate that: (i) the rate of apoptosis of granulosa cells was significantly reduced when granulosa cells were co-cultured with theca cells or obtained from cultured preovulatory follicles in comparison with isolated cultured granulosa cells; (ii) FSH exerts its anti-apoptotic effect only on granulosa cells issued from cultured preovulatory follicles; (iii) ovarian steroids do not affect the percentage of isolated apoptotic granulosa cells; and (iv) the occurrence of an apoptotic process in rabbit theca cells could be upregulated in vitro by hCG and an analogue of the gonadotrophin second messenger cAMP. The results of this study indicate that in rabbits (i) steroids were ineffective in vitro in protecting isolated granulosa cells against apoptosis in comparison with observations in vivo in rats, and (ii) the presence of theca cells was efficient to reduce granulosa cell apoptosis but not sufficient to allow the anti-apoptotic effect of gonadotrophins observed in cultured follicles.
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Maillet G, Benhaïm A, Mittre H, Féral C. Involvement of theca cells and steroids in the regulation of granulosa cell apoptosis in rabbit preovulatory follicles. Reproduction 2003; 125:709-16. [PMID: 12713434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
Follicular atresia is characterized by a rapid loss of granulosa cells and, to a lesser extent, theca cells, via apoptosis. The aim of this study was to investigate the possible involvement of theca cell secretions in the regulation of apoptosis of rabbit granulosa cells. The annexin-V binding method based on externalization of phosphatidylserine to the outer layer of plasma membrane during apoptosis was used to detect apoptotic granulosa cells in flow cytometry. Regulation of apoptosis of granulosa cells was studied in three different culture systems: (i) isolated cultured granulosa cells, (ii) granulosa cells obtained from cultured preovulatory follicles and (iii) granulosa cells co-cultured with theca cells. The results of this study indicate that: (i) the rate of apoptosis of granulosa cells was significantly reduced when granulosa cells were co-cultured with theca cells or obtained from cultured preovulatory follicles in comparison with isolated cultured granulosa cells; (ii) FSH exerts its anti-apoptotic effect only on granulosa cells issued from cultured preovulatory follicles; (iii) ovarian steroids do not affect the percentage of isolated apoptotic granulosa cells; and (iv) the occurrence of an apoptotic process in rabbit theca cells could be upregulated in vitro by hCG and an analogue of the gonadotrophin second messenger cAMP. The results of this study indicate that in rabbits (i) steroids were ineffective in vitro in protecting isolated granulosa cells against apoptosis in comparison with observations in vivo in rats, and (ii) the presence of theca cells was efficient to reduce granulosa cell apoptosis but not sufficient to allow the anti-apoptotic effect of gonadotrophins observed in cultured follicles.
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Affiliation(s)
- G Maillet
- Laboratoire de Biochimie, UPRES EA 2608, USC INRA, CHU Côte de Nacre, Université de Caen, 14032 Caen Cedex, France.
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Maillet G, Bréard E, Benhaïm A, Leymarie P, Féral C. Hormonal regulation of apoptosis in rabbit granulosa cells in vitro: evaluation by flow cytometric detection of plasma membrane phosphatidylserine externalization. Reproduction 2002; 123:243-51. [PMID: 11866691 DOI: 10.1530/rep.0.1230243] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Annexin V and propidium iodide bivariate analysis and the TUNEL method were used to quantify hormonal regulation of apoptosis in rabbit granulosa cells from preovulatory follicles in vitro. The aim of this study was to analyse comparatively the effects of gonadotrophins and their second messenger in the regulation of granulosa cell apoptosis in (i) cultured isolated granulosa cells and (ii) granulosa cells scraped from cultured follicles. The results showed that increasing doses of FSH had no effect on apoptosis of cultured isolated cells but caused a decrease in the number of apoptotic granulosa cells from preovulatory follicles cultured in serum-free conditions. Unlike FSH, addition of hCG did not modify apoptosis of granulosa cells significantly. In contrast, dibutyryl cAMP had an apoptotic effect in the two cellular models in the presence of serum. Moreover, a biphasic effect of dibutyryl cAMP in isolated granulosa cells was observed with an increase in the incorporation of [(3)H]thymidine into DNA at the lowest dose and an increase in apoptotic cell death at the highest dose. It was concluded that, in rabbits: (i) FSH requires follicle integrity to exert its anti-apoptotic effect in granulosa cells; (ii) dibutyryl cAMP induces a dose-dependent apoptotic effect in granulosa cells cultured alone or obtained from cultured preovulatory follicles; and (iii) cAMP signals induce opposite effects on growth and apoptosis in granulosa cells.
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Affiliation(s)
- G Maillet
- Laboratoire de Biochimie, UPRES EA 2608, CHU Côte de Nacre, Université de Caen, 14032 Caen Cedex, France.
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