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Matos MA, Almeida ND, Hocevar LS, Tartaglia A, Salles C, DE Souza AJ. One stage procedure for developmental dysplasia of the hip in patients aged eight years or older. Systematic review and meta-analysis. Acta Orthop Belg 2023; 89:45-50. [PMID: 37294984 DOI: 10.52628/89.1.8940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The objective of the present study is to perform a systematic review with meta-analysis of the literature on treatment of developmental dysplasia of the hip (DDH) in patients over eight years of age to provide better understanding of therapeutic strategies and results. Authors carried out a systematic review and metanalysis of the literature on DDH treated in patients aged eight years of age or older. A literature search was carefully performed from June 2019 to June 2020. The articles had to report one stage reconstructive surgical treatment of DDH for patients eight years or older, presenting clinical and radiographic evaluation according to the Tonnis and Severin, and McKay systems. Meta-analysis was carried out using the software metanalyst to perform the pooled effect size Nine studies met the inclusion criteria. They assessed a total of 234 patients and 266 hips. Female patients accounted for 75.7% (eight unknown) and the follow-up ranged from 1 to 17.4 years. The majority of the procedures included an acetabular surgery (93.9%) while femoral shortening was performed in 78%. Acceptable outcomes were found in between 67% (Mckay system) and 91% (Severin system) of the cases. Femoral varus and derrotation shortening associated with redirectional osteotomy of the acetabulum (for those with closed triradiate cartilage) or acetabular redirection/reshaping were the most prevalent combined procedures; this strategy can lead to 60% of acceptable clinical results and 90% of radiographically acceptable results. Therefore, our findings give credence to the recommendation for the treatment of DDH in patients over eight years old.
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Meira e Cruz M, Gozal D, Salles C, Rocha I. Comorbid Insomnia and Obstructive Sleep Apnea in School Age Children and Adolescents: a descriptive analysis with focus on polysomnographic data. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.522] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Araujo R, Ribeiro P, Souza A, Dias C, Almondes K, Meira e Cruz M, Salles C. Putative metabolic markers in sleep deprived adults: results from a systematic review. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.812] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Meira e Cruz M, Vantine F, Kryger M, Rocha I, Salles C. Cardiometabolic status in high risk pregnant women with comorbid insomnia and sleep disordered breathing: a survey based comparative study. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.308] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Meira e Cruz M, Santos I, Gozal D, Salles C, Rocha I, Ettlin D. Insomnia, sleep disordered breathing and cardiometabolic risk factors in patients complaining of pain in the orofacial region. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.230] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Leandro M, Sá C, Filho D, Souza L, Salles C, Tenorio M, Paz C, Matos M. ASSOCIAÇÕES E FATORES DE RISCO DA OSTEONECROSE DA CABEÇA FEMORAL NA DOENÇA FALCIFORME: REVISÃO SISTEMÁTICA. Hematol Transfus Cell Ther 2020. [DOI: 10.1016/j.htct.2020.10.010] [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: 10/23/2022] Open
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Salles C, Steil MC, Fouletier J, Duttine M, Wattiaux A, Marinha D. Long-term stability of iron-doped calcium titanate CaTi0.9Fe0.1O3−δ oxygen transport membranes under non-reactive and reactive atmospheres. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.04.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Almeida B, Cabral J, Faiçal A, Oliveira J, Souza M, Salles C, Vianna M, D’Agostino E, Ferreira N, Reis L, Embiruçu E, Santos C, Duarte A, Acosta A, Siqueira I. Discordant congenital Zika virus infection in dizygotic twins: a case report. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Cabral J, Faiçal A, Almeida B, Oliveira J, Embiruçu E, Ferreira N, Reis L, Salles C, Cabral B, Costa B, Francisco M, Santos C, Alcantara L, Acosta A, Siqueira I. Neurodevelopmental delays arising from in utero exposure to Zika virus in Salvador, Brazil. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3533] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Farhat N, Loubineaud E, Prest E, El-Chakhtoura J, Salles C, Bucs S, Trampé J, Van den Broek W, Van Agtmaal J, Van Loosdrecht M, Kruithof J, Vrouwenvelder J. Application of monochloramine for wastewater reuse: Effect on biostability during transport and biofouling in RO membranes. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.01.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Salles C, Kerjean JR, Veiseth‐Kent E, Stieger M, Wilde P, Cotillon C. The TeRiFiQ project: Combining technologies to achieve significant binary reductions in sodium, fat and sugar content in everyday foods whilst optimising their nutritional quality. NUTR BULL 2017. [DOI: 10.1111/nbu.12297] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- C. Salles
- CSGA AgroSup Dijon; CNRS INRA Université de Bourgogne Franche‐Comté Dijon France
| | | | | | - M. Stieger
- Wageningen University Wageningen The Netherlands
| | - P. Wilde
- Institute of Food Research Norwich UK
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Fouilland E, Trottet A, Alves-de-Souza C, Bonnet D, Bouvier T, Bouvy M, Boyer S, Guillou L, Hatey E, Jing H, Leboulanger C, Le Floc'h E, Liu H, Mas S, Mostajir B, Nouguier J, Pecqueur D, Rochelle-Newall E, Roques C, Salles C, Tournoud MG, Vasseur C, Vidussi F. Significant Change in Marine Plankton Structure and Carbon Production After the Addition of River Water in a Mesocosm Experiment. Microb Ecol 2017; 74:289-301. [PMID: 28303313 DOI: 10.1007/s00248-017-0962-6] [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] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 03/02/2017] [Indexed: 06/06/2023]
Abstract
Rivers are known to be major contributors to eutrophication in marine coastal waters, but little is known on the short-term impact of freshwater surges on the structure and functioning of the marine plankton community. The effect of adding river water, reducing the salinity by 15 and 30%, on an autumn plankton community in a Mediterranean coastal lagoon (Thau Lagoon, France) was determined during a 6-day mesocosm experiment. Adding river water brought not only nutrients but also chlorophyceans that did not survive in the brackish mesocosm waters. The addition of water led to initial increases (days 1-2) in bacterial production as well as increases in the abundances of bacterioplankton and picoeukaryotes. After day 3, the increases were more significant for diatoms and dinoflagellates that were already present in the Thau Lagoon water (mainly Pseudo-nitzschia spp. group delicatissima and Prorocentrum triestinum) and other larger organisms (tintinnids, rotifers). At the same time, the abundances of bacterioplankton, cyanobacteria, and picoeukaryote fell, some nutrients (NH4+, SiO43-) returned to pre-input levels, and the plankton structure moved from a trophic food web based on secondary production to the accumulation of primary producers in the mesocosms with added river water. Our results also show that, after freshwater inputs, there is rapid emergence of plankton species that are potentially harmful to living organisms. This suggests that flash flood events may lead to sanitary issues, other than pathogens, in exploited marine areas.
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Affiliation(s)
- E Fouilland
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France.
| | - A Trottet
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
- DHI Water & Environment (S) Pte Ltd, 1 Cleantech loop #03-05 Clean Tech One, Singapore, 637141, Singapore
| | - C Alves-de-Souza
- Sorbonne Universités, Université Pierre et Marie Curie - Paris 6, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, CS90074, 29688, Roscoff cedex, France
- Laboratório de Ficologia, Departamento de Botânica, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, s/n, São Cristovão, Rio de Janeiro, RJ, 20940-040, Brazil
| | - D Bonnet
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - T Bouvier
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - M Bouvy
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - S Boyer
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - L Guillou
- Sorbonne Universités, Université Pierre et Marie Curie - Paris 6, CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, CS90074, 29688, Roscoff cedex, France
| | - E Hatey
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - H Jing
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - C Leboulanger
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - E Le Floc'h
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - H Liu
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - S Mas
- UMS 3301Centre d'écologie marine expérimentale MEDIMEER, Université de Montpellier, CNRS, Station Marine, 2 rue des Chantiers, 34200, Sète, France
| | - B Mostajir
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - J Nouguier
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - D Pecqueur
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - E Rochelle-Newall
- UMR 7618 iEES-Paris (IRD-UPMC-CNRS-INRA-UDD-UPEC), UPMC, case 237, 4 place Jussieu, 75252, Paris cedex, France
| | - C Roques
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
| | - C Salles
- UMR 5569 Laboratoire HydroSciences (CNRS, IRD, UM), Université de Montpellier, case courrier 057, 34095, Montpellier cedex 5, France
| | - M-G Tournoud
- UMR 5569 Laboratoire HydroSciences (CNRS, IRD, UM), Université de Montpellier, case courrier 057, 34095, Montpellier cedex 5, France
| | - C Vasseur
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
- LOV-UPMC-CNRS, UMR 7093, Station zoologique, BP 28 06234, Villefranche-sur-mer, France
| | - F Vidussi
- UMR 9190 MARBEC Marine Biodiversity, Exploitation and Conservation, CNRS, IRD, IFREMER, Université de Montpellier, Montpellier & Sète, France
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Salles C, Fouletier J, Marinha D, Steil MC. Determining the rate-limiting step during oxygen semi-permeation of CaTi0.9Fe0.1O3-δ oxygen transport membranes. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.11.083] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Syarifuddin A, Septier C, Salles C, Thomas-Danguin T. Reducing salt and fat while maintaining taste: An approach on a model food system. Food Qual Prefer 2016. [DOI: 10.1016/j.foodqual.2015.08.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tournier C, Rodrigues J, Canon F, Salles C, Feron G. A Method to Evaluate Chewing Efficiency in Infants Through Food Bolus Characterization: A Preliminary Study. J Texture Stud 2015. [DOI: 10.1111/jtxs.12116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- C. Tournier
- UMR6265 Centre des Sciences du Goût et de l'Alimentation; CNRS; Dijon F-21000 France
- UMR1324 Centre des Sciences du Goût et de l'Alimentation; INRA; Dijon F-21000 France
- UMR Centre des Sciences du Goût et de l'Alimentation; Université de Bourgogne; Dijon F-21000 France
| | - J. Rodrigues
- UMR6265 Centre des Sciences du Goût et de l'Alimentation; CNRS; Dijon F-21000 France
- UMR1324 Centre des Sciences du Goût et de l'Alimentation; INRA; Dijon F-21000 France
- UMR Centre des Sciences du Goût et de l'Alimentation; Université de Bourgogne; Dijon F-21000 France
| | - F. Canon
- UMR6265 Centre des Sciences du Goût et de l'Alimentation; CNRS; Dijon F-21000 France
- UMR1324 Centre des Sciences du Goût et de l'Alimentation; INRA; Dijon F-21000 France
- UMR Centre des Sciences du Goût et de l'Alimentation; Université de Bourgogne; Dijon F-21000 France
| | - C. Salles
- UMR6265 Centre des Sciences du Goût et de l'Alimentation; CNRS; Dijon F-21000 France
- UMR1324 Centre des Sciences du Goût et de l'Alimentation; INRA; Dijon F-21000 France
- UMR Centre des Sciences du Goût et de l'Alimentation; Université de Bourgogne; Dijon F-21000 France
| | - G. Feron
- UMR6265 Centre des Sciences du Goût et de l'Alimentation; CNRS; Dijon F-21000 France
- UMR1324 Centre des Sciences du Goût et de l'Alimentation; INRA; Dijon F-21000 France
- UMR Centre des Sciences du Goût et de l'Alimentation; Université de Bourgogne; Dijon F-21000 France
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Emorine M, Septier C, Thomas-Danguin T, Salles C. Ham particle size influences saltiness perception in flans. J Food Sci 2014; 79:S693-6. [PMID: 24621087 DOI: 10.1111/1750-3841.12399] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 01/19/2014] [Indexed: 12/28/2022]
Abstract
One major issue of the food industry is reducing sodium content while maintaining food acceptability and liking. Despite extensive research in this field, little has been published on real complex food products. The aim of this study was to investigate whether the size of particles, a parameter easily adjusted in food processing, could influence the salty taste of low-salt food product. We thus evaluated the effect of ham particle sizes (4 levels, including a zero level) on salt perception and the consumer liking of flans varying in their overall salt concentrations (low- and high-salt content). Two consumer panels, composed of 107 and 77 subjects, rated, respectively, the saltiness of and liking for the developed flans (8 samples). The outcomes of this study indicated first, that the addition of ham to flans increased the salty taste perception and second, that a decrease in ham particle size (ground ham) increased the perceived saltiness. Moreover, low- and high-salt flans were equally liked, demonstrating that food manufacturers could reduce the salt contents (here, by over 15%) while maintaining consumer acceptability through the manipulation of the size of the salt-providing particles.
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Affiliation(s)
- M Emorine
- CNRS, UMR6265 Centre des Sciences du Goût et de l'Alimentation, F-21000 Dijon, France; INRA, UMR1324 Centre des Sciences du Goût et de l'Alimentation, F-21000, Dijon, France; Univ. de Bourgogne, Centre des Sciences du Goût et de l'Alimentation F-21000 Dijon, France
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Chahinian N, Bancon-Montigny C, Brunel V, Aubert G, Salles C, Marchand P, Rodier C, Seidel JL, Gayrard E, Hernandez F, Perrin JL, Tournoud MG. Temporal and spatial variability of organotins in an intermittent Mediterranean river. J Environ Manage 2013; 128:173-181. [PMID: 23747368 DOI: 10.1016/j.jenvman.2013.05.004] [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] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 02/07/2013] [Accepted: 05/08/2013] [Indexed: 06/02/2023]
Abstract
Organotin compounds (OTs) are exclusively anthropogenic and have been widely used for their biocidal properties and as stabilizers in various industrial applications. Hence organotins are common pollutants. Their high toxicity has led to their entry on the EU water framework's priority substances' list. However, few studies are available regarding their behaviour in surface waters, in particular, in intermittent Mediterranean rivers. The Vène is an intermittent river located in Languedoc-Roussillon, southern France. It is the main tributary of an important shellfish farming site: the Thau lagoon. The present study aims at establishing the presence of OTs on a 1.5 km long reach of the river into which a waste water treatment plant (WWTP) discharges. The study is carried out during steady-state flow conditions over two consecutive years and investigates potential OTs sources in everyday domestic activities. Routine field monitoring was carried out over a 5 month period during the springs of 2008 and 2009. The results establish the presence of butyltins and octyltins throughout the 1.5 km long reach at concentrations exceeding the maximum allowable concentration levels imposed by the water framework directive. The WWTP is recognized as an important OTs point source; however, using trace and rare earth elements as tracers, an urban stormwater sewage gutter is identified as a secondary source. Its impact on the river's pollutant loads is however variable in time because of flow intermittency. The paper discusses the need for specific monitoring and management schemes for intermittent rivers.
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Affiliation(s)
- N Chahinian
- Institut de Recherche pour le Développement (IRD), UMR HydroSciences Montpellier, Université Montpellier 2, Case courrier MSE, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France.
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Chabanet C, Tarrega A, Septier C, Siret F, Salles C. Fat and salt contents affect the in-mouth temporal sodium release and saltiness perception of chicken sausages. Meat Sci 2013; 94:253-61. [DOI: 10.1016/j.meatsci.2012.09.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 07/16/2012] [Accepted: 09/06/2012] [Indexed: 11/17/2022]
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Emorine M, Septier C, Thomas-Danguin T, Salles C. Heterogeneous salt distribution in hot snacks enhances saltiness without loss of acceptability. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.01.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Yven C, Guessasma S, Chaunier L, Della Valle G, Salles C. The role of mechanical properties of brittle airy foods on the masticatory performance. J FOOD ENG 2010. [DOI: 10.1016/j.jfoodeng.2010.06.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lawrence G, Salles C, Septier C, Busch J, Thomas-Danguin T. Odour–taste interactions: A way to enhance saltiness in low-salt content solutions. Food Qual Prefer 2009. [DOI: 10.1016/j.foodqual.2008.10.004] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Medeiros M, Santos H, Salles C, Rosa H. Multiple Chemical Sensitivity: an Unusual Case of Vocal Disorder. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.101] [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: 11/28/2022]
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Pionnier E, Sémon E, Chabanet C, Salles C. Évaluation de la technique de microextraction sur phase solide (SPME) pour l'analyse de l'air humain exhalé pendant la consommation d'aliments. ACTA ACUST UNITED AC 2005. [DOI: 10.3166/sda.25.193-206] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pionnier E, Nicklaus S, Chabanet C, Mioche L, Taylor A, Le Quéré J, Salles C. Flavor perception of a model cheese: relationships with oral and physico-chemical parameters. Food Qual Prefer 2004. [DOI: 10.1016/j.foodqual.2004.04.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [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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Salles C, Sommerer N, Septier C, Issanchou S, Chabanet C, Garem A, Quere JLL. Goat Cheese Flavor: Sensory Evaluation of Branched-Chain Fatty Acids and Small Peptides. J Food Sci 2002. [DOI: 10.1111/j.1365-2621.2002.tb10686.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
The taste-active compounds of a Camembert cheese selected for its intense bitterness defect were investigated. The water-soluble fraction (WSE) was extracted with pure water and fractionated by successive tangential ultrafiltrations and nanofiltration. The physicochemical assessment of these fractions led to the construction of a model WSE which was compared by sensory evaluation to the crude water-soluble extract, using a panel of 16 trained tasters. As no significant difference was perceived, this model WSE was then used directly or mixed with other cheese components for omission tests. Among the main taste characteristics of the WSE (salty, sour, umami and bitter), bitterness was found to be due to small peptides whose mass distribution was obtained by RPHPLC-MS (400-3000 Da) and whose taste properties are discussed.
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Affiliation(s)
- E Engel
- Unité Mixte de Recherches sur les Arĵmes, Institut National de la Recherche Agronomique, Dijon, France.
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Engel E, Nicklaus S, Septier C, Salles C, Le Quéré JL. Evolution of the taste of a bitter Camembert cheese during ripening: characterization of a matrix effect. J Agric Food Chem 2001; 49:2930-2939. [PMID: 11409989 DOI: 10.1021/jf000967m] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The objective of this study was to characterize the effect of ripening on the taste of a typically bitter Camembert cheese. The first step was to select a typically bitter cheese among several products obtained by different processes supposed to enhance this taste defect. Second, the evolution of cheese taste during ripening was characterized from a sensory point of view. Finally, the relative impact of fat, proteins, and water-soluble molecules on cheese taste was determined by using omission tests performed on a reconstituted cheese. These omission tests showed that cheese taste resulted mainly from the gustatory properties of water-soluble molecules but was modulated by a matrix effect due to fat, proteins, and cheese structure. The evolution of this matrix effect during ripening was discussed for each taste characteristic.
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Affiliation(s)
- E Engel
- Laboratoire de Recherches sur les Arômes, Institut National de la Recherche Agronomique, 17 rue Sully, B.P. 86510, 21065 Dijon Cedex, France
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Engel E, Tournier C, Salles C, Le Quéré JL. Evolution of the composition of a selected bitter Camembert cheese during ripening: release and migration of taste-active compounds. J Agric Food Chem 2001; 49:2940-2947. [PMID: 11409990 DOI: 10.1021/jf000966u] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of this study was to add to the understanding of changes in taste that occur during the ripening of a bitter Camembert cheese by the evolution of its composition. Physicochemical analyses were performed on rind, under-rind, and center portions of a Camembert cheese selected for its intense bitterness. At each of the six steps of ripening studied organic acids, sugars, total nitrogen, soluble nitrogen, phosphotungstic acid soluble nitrogen, non-protein nitrogen, Na, K, Ca, Mg, Pi, Cl, and biogenic amines were quantified in each portion. Changes in cheese composition seemed to mainly result from the development of Penicillium camemberti on the cheese outer layer. Migration phenomena and the release of potentially taste-active compounds allowed for the evolution of saltiness, sourness, and bitterness throughout ripening to be better understood. Apart from taste-active compounds, the impact of the cheese matrix on its taste development is discussed.
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Affiliation(s)
- E Engel
- Laboratoire de Recherches sur les Arômes, Institut National de la Recherche Agronomique, 17 rue Sully, B.P. 86510, 21065 Dijon Cedex, France
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Sommerer N, Salles C, Promé D, Promé JC, Le Quéré JL. Isolation of oligopeptides from the water-soluble extract of goat cheese and their identification by mass spectrometry. J Agric Food Chem 2001; 49:402-408. [PMID: 11170605 DOI: 10.1021/jf000200u] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A procedure for the separation and identification of small peptides from the water-soluble fraction of a goat cheese was developed. The water-soluble extract was ultrafiltered (1000 Da membrane cutoff), and peptides were isolated by sequential chromatography: size exclusion chromatography (HPLC-grade water), anion exchange chromatography (phosphate buffer gradient), and semipreparative reverse-phase high-performance liquid chromatography (water/acetonitrile gradient). The fractions obtained were analyzed by combined mass spectrometry methods including electrospray ionization, liquid secondary ionization, and tandem mass spectrometry to identify and to confirm the sequences of 28 tri- to octapeptides naturally appearing in goat cheese during ripening. Among these peptides, 26 are produced by degradation of caseins but do not correspond to the known specific cleavages due to chymosin. Only low correlation was found between hydrophobicity of peptides and HPLC elution time with acetonitrile gradient.
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Affiliation(s)
- N Sommerer
- INRA Laboratoire de Recherches Sur les Arômes, 17 rue Sully, F-21065 Dijon Cedex, France
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Engel E, Nicklaus S, Septier C, Salles C, Le Quéré JL. Taste active compounds in a goat cheese water-soluble extract. 2. Determination of the relative impact of water-soluble extract components on its taste using omission tests. J Agric Food Chem 2000; 48:4260-4267. [PMID: 10995347 DOI: 10.1021/jf991364h] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of this work was to determine the relative impact of water-soluble compounds on the gustatory properties of a goat cheese water-soluble extract (WSE). Using a semisynthetic model mixture (MWSE) previously elaborated in physicochemical and gustatory accordance with the cheese WSE (see part 1, Engel et al. J. Agric. Food Chem. 2000, 48, 4252-4259), omission tests were performed. Among the main taste characteristics of the WSE (salty, sour, and bitter), saltiness was explained by an additive contribution of sodium, potassium, calcium, and magnesium cations, whereas sourness was mainly due to a synergistic effect involving sodium chloride, phosphates, and lactic acid and bitterness was found to result from calcium and magnesium chlorides, the impact of which was partially masked by sodium chloride. In contrast, amino acids, lactose, and peptides did not have any significant impact on WSE taste properties. To quantify the contribution of the taste active compounds to bitterness and saltiness, stepwise multiple linear regressions were performed. Those contributions were expressed as a percentage of the considered taste characteristic intensity in the WSE. The model obtained allowed up to 97.4% of the perceived saltiness to be described and approximately 85% of the bitterness.
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Affiliation(s)
- E Engel
- Laboratoire de Recherches sur les Arômes, Institut National de la Recherche Agronomique 17 rue Sully, BP 86510, 21065 Dijon Cedex, France
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Engel E, Nicklaus S, Garem A, Septier C, Salles C, Le Quéré JL. Taste active compounds in a goat cheese water-soluble extract. 1. Development and sensory validation of a model water-soluble extract. J Agric Food Chem 2000; 48:4252-4259. [PMID: 10995346 DOI: 10.1021/jf991363p] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of this study was to evaluate the impact of the components of a goat cheese water-soluble extract (WSE) on its flavor by both physicochemical and sensory techniques with special emphasis on taste. After characterization of the organoleptic properties of the cheese, the WSE was extracted with pure water and submitted to successive tangential ultrafiltrations and nanofiltration. The physicochemical assessment of these fractions led to the constitution of a model mixture (MWSE) compared by sensory evaluation to the crude WSE, using a panel of 16 trained members. The results of both sensory profile and triangular tests indicate no significant difference, therefore proving that the reconstitution of the WSE was correct, thereby showing the sensory neutrality of lipids and peptides smaller than 500 Da, which had not been included in the MWSE. Moreover, the cheese gustatory characteristics are comparable to those of the WSE despite weaker levels of sharpness and astringency in the extract, the respective origins of which are discussed.
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Affiliation(s)
- E Engel
- Laboratoire de Recherches sur les Arômes, Institut National de la Recherche Agronomique, 17 rue Sully, BP 86510, 21065 Dijon Cedex, France
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Benos PV, Gatt MK, Ashburner M, Murphy L, Harris D, Barrell B, Ferraz C, Vidal S, Brun C, Demailles J, Cadieu E, Dreano S, Gloux S, Lelaure V, Mottier S, Galibert F, Borkova D, Minana B, Kafatos FC, Louis C, Sidén-Kiamos I, Bolshakov S, Papagiannakis G, Spanos L, Cox S, Madueño E, de Pablos B, Modolell J, Peter A, Schöttler P, Werner M, Mourkioti F, Beinert N, Dowe G, Schäfer U, Jäckle H, Bucheton A, Callister DM, Campbell LA, Darlamitsou A, Henderson NS, McMillan PJ, Salles C, Tait EA, Valenti P, Saunder RD, Glover DM. From sequence to chromosome: the tip of the X chromosome of D. melanogaster. Science 2000; 287:2220-2. [PMID: 10731137 DOI: 10.1126/science.287.5461.2220] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
One of the rewards of having a Drosophila melanogaster whole-genome sequence will be the potential to understand the molecular bases for structural features of chromosomes that have been a long-standing puzzle. Analysis of 2.6 megabases of sequence from the tip of the X chromosome of Drosophila identifies 273 genes. Cloned DNAs from the characteristic bulbous structure at the tip of the X chromosome in the region of the broad complex display an unusual pattern of in situ hybridization. Sequence analysis revealed that this region comprises 154 kilobases of DNA flanked by 1.2-kilobases of inverted repeats, each composed of a 350-base pair satellite related element. Thus, some aspects of chromosome structure appear to be revealed directly within the DNA sequence itself.
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Affiliation(s)
- P V Benos
- The European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton Hall, Cambridge CB10 1SD, UK
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Salles C, Hervé C, Septier C, Demaizières D, Lesschaeve I, Issanchou S, Le Quéré J. Evaluation of taste compounds in water-soluble extract of goat cheeses. Food Chem 2000. [DOI: 10.1016/s0308-8146(99)00213-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Alexandre J, Saboya F, Marques BC, Ribeiro MLP, Salles C, da Silva MG, Sthel MS, Auler LT, Vargas H. Photoacoustic thermal characterization of kaolinite clays. Analyst 1999. [DOI: 10.1039/a902601k] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sommerer N, Garem A, Mollé D, Septier C, Le Quéré J, Salles C. Isolation of a peptidic fraction from the goat cheese water-soluble extract by nanofiltration for sensory evaluation studies. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0167-4501(98)80047-2] [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: 03/07/2023]
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Kunen S, Overstreet S, Salles C. Concurrent validity study of the Slosson Intelligence Test-Revised in mental retardation testing. Ment Retard 1996; 34:380-6. [PMID: 8990822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The new Slosson Intelligence Test-Revised and the recommended abbreviated battery of the Stanford-Binet Intelligence Scale: Fourth Edition were given to individuals whose Stanford-Binet IQs ranged from 36 to 110. The Slosson-R correlated highly with the Stanford-Binet, r = .92. However, except for the moderately retarded category, the Slosson-R unsatisfactorily matched the Stanford-Binet's assignment of individuals to IQ categories. In contrast, when all individuals were classified as either having or not having mental retardation, the match rate was much better. The Slosson-R can adequately screen for mental retardation, but its ability to accurately assign individuals to specific IQ categories appears to be limited.
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Affiliation(s)
- S Kunen
- Department of Psychology, University of New Orleans, LA 70148, USA
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Costa CG, Halzen F, Bellandi J, Salles C. Composition of primary cosmic rays beyond the "knee" from emulsion chamber observations. Phys Rev D Part Fields 1996; 54:5558-5562. [PMID: 10021244 DOI: 10.1103/physrevd.54.5558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Costa CG, Halzen F, Salles C. Particle production in very-high-energy cosmic-ray emulsion chamber events: Usual and unusual events. Phys Rev D Part Fields 1995; 52:3890-3893. [PMID: 10019616 DOI: 10.1103/physrevd.52.3890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Salles C, Dalmas S, Septier C, Issanchou S, Noël Y, Etiévant P, Le Quéré J. Production of a cheese model for sensory evaluation of flavour compounds. ACTA ACUST UNITED AC 1995. [DOI: 10.1051/lait:1995642] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Mével-Ninio M, Terracol R, Salles C, Vincent A, Payre F. ovo, a Drosophila gene required for ovarian development, is specifically expressed in the germline and shares most of its coding sequences with shavenbaby, a gene involved in embryo patterning. Mech Dev 1995; 49:83-95. [PMID: 7748792 DOI: 10.1016/0925-4773(94)00305-7] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Genetic analyses of Drosophila oogenesis have revealed the central role of ovo, a gene required for differentiation of the female germline. A number of recessive ovo mutations also affect the shavenbaby (svb) function required for late embryo patterning, suggesting a tight structural link between ovo and svb. By using various genomic probes for in situ hybridization to wild type and mutant embryos, we show that ovo indeed shares most of its coding sequences with svb. svb expression is detected early in the presumptive head region and later in each segment. It requires control elements located upstream of the ovo genomic region. ovo expresses abundant maternal RNAs which are uniformly distributed in early cleavage embryos. A fraction that lacks an alternative ovo-specific protein coding region (ORF 2b) is detected in pole cells. Expression of an ovo-specific lacZ reporter gene (ovoB) shows that ovo encodes a nuclear protein present in the germline of both sexes. Zygotic ovoB expression is first detected in embryos at around stage 17 and persists up to the adult stage. Our data show that the germline specific expression of ovo in females correlates with its function in oogenesis. This expression, however, is also observed in males in which ovo is not required.
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Affiliation(s)
- M Mével-Ninio
- Centre de Génétique Moléculaire du C.N.R.S, Gif sur Yvette, France
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Bellandi J, Costa CG, Covolan RJ, Dobrigkeit C, Mundim LM, Salles C. Analytical description of hadronic integral spectra of cosmic-ray superfamilies with Feynman scaling breaking. Int J Clin Exp Med 1994; 50:6836-6842. [PMID: 10017660 DOI: 10.1103/physrevd.50.6836] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ferrer P, Crozatier M, Salles C, Vincent A. Interspecific comparison of Drosophila serendipity delta and beta: multimodular structure of these C2H2 zinc finger proteins. J Mol Evol 1994; 38:263-73. [PMID: 8006993 DOI: 10.1007/bf00176088] [Citation(s) in RCA: 6] [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: 01/28/2023]
Abstract
The Drosophila serendipity (sry) beta and delta genes, which resulted from a gene duplication event, provide an interesting model for the evolutionary diversification in structure and function of C2H2 zinc finger proteins. We examined here the divergence of the sry beta and delta proteins over an estimated period of 45 million years by comparing their predicted sequences in D. melanogaster, D. pseudoobscura, and D. subobscura. Between orthologs, i.e., pairs of either sry beta or sry delta, the NH2-proximal region delineated by pairs of C-X2-C motifs and the DNA-binding finger domain are highly conserved. Sequence conservation operates over the entire finger domain, including the links separating adjacent fingers, even though each has a unique sequence different from the widespread TGEKP motif. In contrast, the sequence of the central acidic region has extensively diverged and differs between species in the number of amino acids, probably because of slippage-driven mutations. The NH2-terminal region and fingers 1, 5, and 6 differentiate the sry beta and delta proteins while zinc fingers 2, 3, and 4 are virtually identical in these two paralogs. A nuclear localization signal of the SV40T antigen type, preceded by a potential CKII phosphorylation regulatory site, is conserved in sry delta but not found in sry beta. The interspecific conserved regions correlate well with the positions of zygotic lethal mutations in the D. melanogaster sry delta protein. Furthermore, P-element transformation experiments show that a transgenic copy of the D. pseudoobscura sry delta gene rescues the sry delta mutant phenotype. Convergence of genetic and structural data on the sry proteins supports a multimodular function and mode of evolution of these C2H2 finger proteins.
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Affiliation(s)
- P Ferrer
- Centre de Biologie du Développement, Scientifique/Université Paul Sabatier, Toulouse, France
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Méjean V, Salles C, Bullions LC, Bessman MJ, Claverys JP. Characterization of the mutX gene of Streptococcus pneumoniae as a homologue of Escherichia coli mutT, and tentative definition of a catalytic domain of the dGTP pyrophosphohydrolases. Mol Microbiol 1994; 11:323-30. [PMID: 8170394 DOI: 10.1111/j.1365-2958.1994.tb00312.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We show that deletion of a gene of Streptococcus pneumoniae, which we call mutX, confers a mutator phenotype to resistance to streptomycin. Analysis of the DNA sequence changes that occurred in several streptomycin-resistant mutants showed that mutations are unidirectional AT to CG transversions. The mutX gene is located immediately downstream of the previously identified ung gene and genetic evidence suggests that the two genes are co-ordinately regulated. Nucleotide sequence determination reveals that the mutX gene encodes a 17,870 Da protein (154 residues) which exhibits significant homology with the MutT protein of Escherichia coli, a nucleoside triphosphatase (dGTP pyrophosphohydrolase). The mutX gene complements the E. coli mutT mutator phenotype when introduced on a plasmid. Site-directed mutagenesis and analysis of nitrosoguanidine-induced mutT mutants suggest that a small region of high homology between the two proteins (61% identity over 23 residues) is part of the catalytic site of the nucleoside triphosphatase. Computer searching for sequence homology to MutX uncovered a second E. coli protein, the product of orf17, a gene of unknown function located near the ruvC gene. The region of high homology between MutX and MutT is also conserved in this protein, which raises the interesting possibility that the orf17 gene plays some role in determining mutation rates in E. coli. Finally, a small set of proteins, including a family of virus-encoded proteins and two evolutionarily conserved proteins encoded by an antisense transcript from the Xenopus laevis and human bFGF genes, were also found to harbour significant homology to this highly conserved region.
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Affiliation(s)
- V Méjean
- Microbiologie et Génétique Moléculaires CNRS-UPR 9007, Université Paul Sabatier, Toulouse, France
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Salles C, Créancier L, Claverys JP, Méjean V. The high level streptomycin resistance gene from Streptococcus pneumoniae is a homologue of the ribosomal protein S12 gene from Escherichia coli. Nucleic Acids Res 1992; 20:6103. [PMID: 1461744 PMCID: PMC334482 DOI: 10.1093/nar/20.22.6103] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- C Salles
- CNRS-UPR9007, Université Paul Sabatier, Toulouse, France
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Abstract
A fluorescence polarization technique with 1,6-diphenyl 1,3,5-hexatriene as a fluorescent probe was used to determine the fluidity of red cell membranes from hemodialysed patients before and after dialysis. After dialysis, there was a decrease in fluidity and activation energy values revealed a significantly changed distribution. The membrane lipid composition showed a significant increase in cholesterol after dialysis (p less than 0.001) and a significant reduction in saturated fatty acids (p less than 0.01) with an increase in unsaturated fatty acids (p less than 0.05). A compensatory mechanism could be suggested involving a reduction of saturated fatty acids in response to the increase in the cholesterol/phospholipid ratio. This could lead to an optimization of membrane fluidity.
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Affiliation(s)
- E Peuchant
- Laboratoire de Biochimie Médicale A, Université de Bordeaux II, Clermont-Ferrand, France
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Fournier F, Salles C, Tabet J, Debrauwer L, Rao D, Paris A, Borie G. Tandem mass spectrometric investigation on 17β-estradiol palmitate in negative ion chemical ionization. Anal Chim Acta 1990. [DOI: 10.1016/s0003-2670(00)83656-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
A one-step extraction procedure to directly quantify cholesterol, phospholipids, and fatty acids in red blood cell membranes has been developed. The method uses a single solvent, isopropanol, which extracts lipids and allows the rapid formation of isopropylic esters of fatty acids by acid catalysis. The efficiency of this new technique has been confirmed by comparing yields of cholesterol and total and individual phospholipids with yields obtained following conventional extraction procedures. Moreover, in comparison to the formation of methyl esters, we demonstrate that directly obtained isopropylic esters immediately allow the quantitative determination of fatty acids, without involving the hydrolytic degradation of fatty acids and the oxidation of unsaturated fatty acids.
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Affiliation(s)
- E Peuchant
- Department of Biochemistry, Saint-André Hospital, Bordeaux, France
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