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Fooyontphanich K, Morcillo F, Joët T, Dussert S, Serret J, Collin M, Amblard P, Tangphatsornruang S, Roongsattham P, Jantasuriyarat C, Verdeil JL, Tranbarger TJ. Multi-scale comparative transcriptome analysis reveals key genes and metabolic reprogramming processes associated with oil palm fruit abscission. BMC Plant Biol 2021; 21:92. [PMID: 33573592 PMCID: PMC7879690 DOI: 10.1186/s12870-021-02874-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Fruit abscission depends on cell separation that occurs within specialized cell layers that constitute an abscission zone (AZ). To determine the mechanisms of fleshy fruit abscission of the monocot oil palm (Elaeis guineensis Jacq.) compared with other abscission systems, we performed multi-scale comparative transcriptome analyses on fruit targeting the developing primary AZ and adjacent tissues. RESULTS Combining between-tissue developmental comparisons with exogenous ethylene treatments, and naturally occurring abscission in the field, RNAseq analysis revealed a robust core set of 168 genes with differentially regulated expression, spatially associated with the ripe fruit AZ, and temporally restricted to the abscission timing. The expression of a set of candidate genes was validated by qRT-PCR in the fruit AZ of a natural oil palm variant with blocked fruit abscission, which provides evidence for their functions during abscission. Our results substantiate the conservation of gene function between dicot dry fruit dehiscence and monocot fleshy fruit abscission. The study also revealed major metabolic transitions occur in the AZ during abscission, including key senescence marker genes and transcriptional regulators, in addition to genes involved in nutrient recycling and reallocation, alternative routes for energy supply and adaptation to oxidative stress. CONCLUSIONS The study provides the first reference transcriptome of a monocot fleshy fruit abscission zone and provides insight into the mechanisms underlying abscission by identifying key genes with functional roles and processes, including metabolic transitions, cell wall modifications, signalling, stress adaptations and transcriptional regulation, that occur during ripe fruit abscission of the monocot oil palm. The transcriptome data comprises an original reference and resource useful towards understanding the evolutionary basis of this fundamental plant process.
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Affiliation(s)
- Kim Fooyontphanich
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
- Grow A Green Co, Ltd. 556 Maha Chakraphat Rd. Namaung, Chachoengsao, Chachoengsao Province, 24000, Thailand
| | - Fabienne Morcillo
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
- CIRAD, DIADE, F-34398, Montpellier, France
| | - Thierry Joët
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | - Stéphane Dussert
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | - Julien Serret
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | - Myriam Collin
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | | | - Sithichoke Tangphatsornruang
- National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Pathum Thani, Thailand
| | - Peerapat Roongsattham
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
- Department of Genetics, Faculty of Science, Kasetsart University Bangkhen Campus, 50 Phahonyothin Road Jatujak, Bangkok, Thailand
| | - Chatchawan Jantasuriyarat
- Department of Genetics, Faculty of Science, Kasetsart University Bangkhen Campus, 50 Phahonyothin Road Jatujak, Bangkok, Thailand
| | - Jean-Luc Verdeil
- CIRAD, UMR AGAP, F-34398, Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France
| | - Timothy J Tranbarger
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France.
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Guerin C, Joët T, Serret J, Lashermes P, Vaissayre V, Agbessi MDT, Beulé T, Severac D, Amblard P, Tregear J, Durand-Gasselin T, Morcillo F, Dussert S. Gene coexpression network analysis of oil biosynthesis in an interspecific backcross of oil palm. Plant J 2016; 87:423-41. [PMID: 27145323 DOI: 10.1111/tpj.13208] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 03/23/2016] [Revised: 04/27/2016] [Accepted: 04/27/2016] [Indexed: 05/25/2023]
Abstract
Global demand for vegetable oils is increasing at a dramatic rate, while our understanding of the regulation of oil biosynthesis in plants remains limited. To gain insights into the mechanisms that govern oil synthesis and fatty acid (FA) composition in the oil palm fruit, we used a multilevel approach combining gene coexpression analysis, quantification of allele-specific expression and joint multivariate analysis of transcriptomic and lipid data, in an interspecific backcross population between the African oil palm, Elaeis guineensis, and the American oil palm, Elaeis oleifera, which display contrasting oil contents and FA compositions. The gene coexpression network produced revealed tight transcriptional coordination of fatty acid synthesis (FAS) in the plastid with sugar sensing, plastidial glycolysis, transient starch storage and carbon recapture pathways. It also revealed a concerted regulation, along with FAS, of both the transfer of nascent FA to the endoplasmic reticulum, where triacylglycerol assembly occurs, and of the production of glycerol-3-phosphate, which provides the backbone of triacylglycerols. Plastid biogenesis and auxin transport were the two other biological processes most tightly connected to FAS in the network. In addition to WRINKLED1, a transcription factor (TF) known to activate FAS genes, two novel TFs, termed NF-YB-1 and ZFP-1, were found at the core of the FAS module. The saturated FA content of palm oil appeared to vary above all in relation to the level of transcripts of the gene coding for β-ketoacyl-acyl carrier protein synthase II. Our findings should facilitate the development of breeding and engineering strategies in this and other oil crops.
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Affiliation(s)
- Chloé Guerin
- PalmElit SAS, Montferrier-sur-Lez, F-34980, France
| | - Thierry Joët
- IRD, UMR DIADE, 911 Av. Agropolis, Montpellier, 34394, France
| | - Julien Serret
- IRD, UMR DIADE, 911 Av. Agropolis, Montpellier, 34394, France
| | | | | | | | | | - Dany Severac
- MGX-Montpellier GenomiX, c/o Institut de Génomique Fonctionnelle, 141 Rue de la Cardonille, Montpellier Cedex 5, 34094, France
| | | | - James Tregear
- IRD, UMR DIADE, 911 Av. Agropolis, Montpellier, 34394, France
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Roongsattham P, Morcillo F, Fooyontphanich K, Jantasuriyarat C, Tragoonrung S, Amblard P, Collin M, Mouille G, Verdeil JL, Tranbarger TJ. Cellular and Pectin Dynamics during Abscission Zone Development and Ripe Fruit Abscission of the Monocot Oil Palm. Front Plant Sci 2016; 7:540. [PMID: 27200017 PMCID: PMC4844998 DOI: 10.3389/fpls.2016.00540] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 04/05/2016] [Indexed: 05/09/2023]
Abstract
The oil palm (Elaeis guineensis Jacq.) fruit primary abscission zone (AZ) is a multi-cell layered boundary region between the pedicel (P) and mesocarp (M) tissues. To examine the cellular processes that occur during the development and function of the AZ cell layers, we employed multiple histological and immunohistochemical methods combined with confocal, electron and Fourier-transform infrared (FT-IR) microspectroscopy approaches. During early fruit development and differentiation of the AZ, the orientation of cell divisions in the AZ was periclinal compared with anticlinal divisions in the P and M. AZ cell wall width increased earlier during development suggesting cell wall assembly occurred more rapidly in the AZ than the adjacent P and M tissues. The developing fruit AZ contain numerous intra-AZ cell layer plasmodesmata (PD), but very few inter-AZ cell layer PD. In the AZ of ripening fruit, PD were less frequent, wider, and mainly intra-AZ cell layer localized. Furthermore, DAPI staining revealed nuclei are located adjacent to PD and are remarkably aligned within AZ layer cells, and remain aligned and intact after cell separation. The polarized accumulation of ribosomes, rough endoplasmic reticulum, mitochondria, and vesicles suggested active secretion at the tip of AZ cells occurred during development which may contribute to the striated cell wall patterns in the AZ cell layers. AZ cells accumulated intracellular pectin during development, which appear to be released and/or degraded during cell separation. The signal for the JIM5 epitope, that recognizes low methylesterified and un-methylesterified homogalacturonan (HG), increased in the AZ layer cell walls prior to separation and dramatically increased on the separated AZ cell surfaces. Finally, FT-IR microspectroscopy analysis indicated a decrease in methylesterified HG occurred in AZ cell walls during separation, which may partially explain an increase in the JIM5 epitope signal. The results obtained through a multi-imaging approach allow an integrated view of the dynamic developmental processes that occur in a multi-layered boundary AZ and provide evidence for distinct regulatory mechanisms that underlie oil palm fruit AZ development and function.
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Affiliation(s)
| | | | - Kim Fooyontphanich
- UMR DIADE, Institut de Recherche pour le DéveloppementMontpellier, France
| | | | - Somvong Tragoonrung
- National Center for Genetic Engineering and Biotechnology, Genome InstitutePathum Thani, Thailand
| | | | - Myriam Collin
- UMR DIADE, Institut de Recherche pour le DéveloppementMontpellier, France
| | - Gregory Mouille
- Institut Jean-Pierre Bourgin, UMR1318 Institut National de la Recherche Agronomique -AgroParisTechERL3559 Centre National de la Recherche Scientifique, France
| | | | - Timothy J. Tranbarger
- UMR DIADE, Institut de Recherche pour le DéveloppementMontpellier, France
- *Correspondence: Timothy J. Tranbarger
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Roongsattham P, Morcillo F, Jantasuriyarat C, Pizot M, Moussu S, Jayaweera D, Collin M, Gonzalez-Carranza ZH, Amblard P, Tregear JW, Tragoonrung S, Verdeil JL, Tranbarger TJ. Temporal and spatial expression of polygalacturonase gene family members reveals divergent regulation during fleshy fruit ripening and abscission in the monocot species oil palm. BMC Plant Biol 2012; 12:150. [PMID: 22920238 PMCID: PMC3546427 DOI: 10.1186/1471-2229-12-150] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 07/26/2012] [Indexed: 05/18/2023]
Abstract
BACKGROUND Cell separation that occurs during fleshy fruit abscission and dry fruit dehiscence facilitates seed dispersal, the final stage of plant reproductive development. While our understanding of the evolutionary context of cell separation is limited mainly to the eudicot model systems tomato and Arabidopsis, less is known about the mechanisms underlying fruit abscission in crop species, monocots in particular. The polygalacturonase (PG) multigene family encodes enzymes involved in the depolymerisation of pectin homogalacturonan within the primary cell wall and middle lamella. PG activity is commonly found in the separation layers during organ abscission and dehiscence, however, little is known about how this gene family has diverged since the separation of monocot and eudicots and the consequence of this divergence on the abscission process. RESULTS The objective of the current study was to identify PGs responsible for the high activity previously observed in the abscission zone (AZ) during fruit shedding of the tropical monocot oil palm, and to analyze PG gene expression during oil palm fruit ripening and abscission. We identified 14 transcripts that encode PGs, all of which are expressed in the base of the oil palm fruit. The accumulation of five PG transcripts increase, four decrease and five do not change during ethylene treatments that induce cell separation. One PG transcript (EgPG4) is the most highly induced in the fruit base, with a 700-5000 fold increase during the ethylene treatment. In situ hybridization experiments indicate that the EgPG4 transcript increases preferentially in the AZ cell layers in the base of the fruit in response to ethylene prior to cell separation. CONCLUSIONS The expression pattern of EgPG4 is consistent with the temporal and spatial requirements for cell separation to occur during oil palm fruit shedding. The sequence diversity of PGs and the complexity of their expression in the oil palm fruit tissues contrast with data from tomato, suggesting functional divergence underlying the ripening and abscission processes has occurred between these two fruit species. Furthermore, phylogenetic analysis of EgPG4 with PGs from other species suggests some conservation, but also diversification has occurred between monocots and eudicots, in particular between dry and fleshy fruit species.
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Affiliation(s)
- Peerapat Roongsattham
- Institut de Recherche pour le Développement, IRD Centre de Montpellier, IRD/CIRAD Palm Development Group, DIADE 911 avenue agropolis BP 64501, 34394, Montpellier cedex 5, France
| | - Fabienne Morcillo
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, UMR DIADE, Montpellier, F-34398, France
| | - Chatchawan Jantasuriyarat
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkhen Campus, 50 Phahonyothin Road, Jatujak, Thailand
| | - Maxime Pizot
- Institut de Recherche pour le Développement, IRD Centre de Montpellier, IRD/CIRAD Palm Development Group, DIADE 911 avenue agropolis BP 64501, 34394, Montpellier cedex 5, France
| | - Steven Moussu
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, UMR DIADE, Montpellier, F-34398, France
| | - Dasuni Jayaweera
- Division, Loughborough, The University of Nottingham, Sutton Bonington Campus, School of Biosciences, Plant Science, Leicestershire, LE12 5RD, United Kingdom
| | - Myriam Collin
- Institut de Recherche pour le Développement, IRD Centre de Montpellier, IRD/CIRAD Palm Development Group, DIADE 911 avenue agropolis BP 64501, 34394, Montpellier cedex 5, France
| | - Zinnia H Gonzalez-Carranza
- Division, Loughborough, The University of Nottingham, Sutton Bonington Campus, School of Biosciences, Plant Science, Leicestershire, LE12 5RD, United Kingdom
| | | | - James W Tregear
- Institut de Recherche pour le Développement, IRD Centre de Montpellier, IRD/CIRAD Palm Development Group, DIADE 911 avenue agropolis BP 64501, 34394, Montpellier cedex 5, France
| | - Somvong Tragoonrung
- Genome Institute, National Center for Genetic Engineering and Biotechnology, BIOTEC, 113 Thailand Science Park, Phahonyothin Road, Klong 1, Klong Luang, Pathumthani, 12120, Thailand
| | - Jean-Luc Verdeil
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement CIRAD, UMR AGAP, MRI-PHIV, Montpellier, F-34398, France
| | - Timothy J Tranbarger
- Institut de Recherche pour le Développement, IRD Centre de Montpellier, IRD/CIRAD Palm Development Group, DIADE 911 avenue agropolis BP 64501, 34394, Montpellier cedex 5, France
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Bonnot D, Béani JC, Bourrain J, Berthod F, Boitard M, Reymond J, Bériel H, Amblard P. Analysis of 8-methoxypsoralen plasma kinetics in 475 subjects: investigation of factors that could modify the bioavailability of 8-MOP. J DERMATOL TREAT 2009. [DOI: 10.3109/09546639409084533] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Beani JC, Bonnot D, Berthod F, Boitard M, Reymond JL, Beriel H, Amblard P. Bioavailability of two 8-methoxypsoralen formulations. J DERMATOL TREAT 2009. [DOI: 10.3109/09546639209088706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Billotte N, Marseillac N, Risterucci AM, Adon B, Brottier P, Baurens FC, Singh R, Herrán A, Asmady H, Billot C, Amblard P, Durand-Gasselin T, Courtois B, Asmono D, Cheah SC, Rohde W, Ritter E, Charrier A. Microsatellite-based high density linkage map in oil palm (Elaeis guineensis Jacq.). Theor Appl Genet 2005; 110:754-65. [PMID: 15723275 DOI: 10.1007/s00122-004-1901-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2003] [Accepted: 12/02/2004] [Indexed: 05/20/2023]
Abstract
A microsatellite-based high-density linkage map for oil palm (Elaeis guinensis Jacq.) was constructed from a cross between two heterozygous parents, a tenera palm from the La Me population (LM2T) and a dura palm from the Deli population (DA10D). A set of 390 simple sequence repeat (SSR) markers was developed in oil palm from microsatellite-enriched libraries and evaluated for polymorphism along with 21 coconut SSRs. A dense and genome-wide microsatellite framework as well as saturating amplified fragments length polymorphisms (AFLPs) allowed the construction of a linkage map consisting of 255 microsatellites, 688 AFLPs and the locus of the Sh gene, which controls the presence or absence of a shell in the oil palm fruit. An AFLP marker E-Agg/M-CAA132 was mapped at 4.7 cM from the Sh locus. The 944 genetic markers were distributed on 16 linkage groups (LGs) and covered 1,743 cM. Our linkage map is the first in oil palm to have 16 independent linkage groups corresponding to the plant's 16 homologous chromosome pairs. It is also the only high-density linkage map with as many microsatellite markers in an Arecaceae species and represents an important step towards quantitative trait loci analysis and physical mapping in the E. guineensis species.
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Affiliation(s)
- N Billotte
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR 1096 Polymorphismes d'Intérêt Agronomique, TA 40/03 Avenue Agropolis, 34398, Montpellier Cedex 5, France.
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Affiliation(s)
- J L Bourrain
- Allergologie - Photobiologie, Département Pluridisciplinaire de Médecine, CHU de Grenoble, France.
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Chosidow O, Amblard P, Bazex J, Bernard P. [Seborrheic dermatitis]. Ann Dermatol Venereol 2002; 129:S191-3. [PMID: 12718151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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Guillot B, Denoeux JP, Amblard P, Grosshans E, Bedane C. [Leg ulcer]. Ann Dermatol Venereol 2002; 129:S126-31. [PMID: 12718139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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Amblard P, Béani JC, Bonnetblanc JM, Crickx B, Roujeau JC. [Health risks associated with radiation. Radioprotection. Specifying biological risks associated with natural radiation and knowing how to inform the patients]. Ann Dermatol Venereol 2002; 129:S19-22. [PMID: 12718120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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Dreno B, Moyse D, Alirezai M, Amblard P, Auffret N, Beylot C, Bodokh I, Chivot M, Daniel F, Humbert P, Meynadier J, Poli F. Multicenter randomized comparative double-blind controlled clinical trial of the safety and efficacy of zinc gluconate versus minocycline hydrochloride in the treatment of inflammatory acne vulgaris. Dermatology 2002; 203:135-40. [PMID: 11586012 DOI: 10.1159/000051728] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND In addition to tetracyclines, zinc may constitute an alternative treatment in inflammatory lesions of acne. OBJECTIVE To evaluate the place of zinc gluconate in relation to antibiotics in the treatment of acne vulgaris. METHODS Zinc was compared to minocycline in a multicenter randomized double-blind trial. 332 patients received either 30 mg elemental zinc or 100 mg minocycline over 3 months. The primary endpoint was defined as the percentage of the clinical success rate on day 90 (i.e. more than 2/3 decrease in inflammatory lesions, i.e. papules and pustules). RESULTS This clinical success rate was 31.2% for zinc and 63.4% for minocycline. Minocycline nevertheless showed a 9% superiority in action at 1 month and one of 17% at 3 months, with respect to the mean change in lesion count. Regarding safety, the majority of the adverse effects of zinc gluconate and of minocycline concerned the gastrointestinal system and were moderate (5 dropouts with zinc gluconate and 4 with minocycline). CONCLUSION Minocycline and zinc gluconate are both effective in the treatment of inflammatory acne, but minocycline has a superior effect evaluated to be 17% in our study.
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Affiliation(s)
- B Dreno
- Department of Dermatology, CHU Nantes, France
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Lachapelle JM, Amblard P, Ramelet AA. [News of the Association of French speaking dermatologists. Memories from Cayenne]. Ann Dermatol Venereol 2001; 128:1001-2. [PMID: 11907957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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Billotte N, Risterucci AM, Barcelos E, Noyer JL, Amblard P, Baurens FC. Development, characterisation, and across-taxa utility of oil palm (Elaeis guineensis Jacq.) microsatellite markers. Genome 2001. [DOI: 10.1139/g01-017] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The results of the development of oil palm (Elaeis guineensis Jacq.) microsatellite markers are given step by step, from the screening of libraries enriched in (GA)n, (GT)n, and (CCG)n simple-sequence repeats (SSRs) to the final characterisation of 21 SSR loci. Also published are primer sequences, estimates of allele size range, and expected heterozygosity in E. guineensis and in the closely related species E. oleifera, in which an optimal utility of the SSR markers was observed. Multivariate data analyses showed the ability of SSR markers to efficiently reveal the genetic-diversity structure of the genus Elaeis in accordance with known geographical origins and with measured genetic relationships based on previous molecular studies. High levels of allelic variability indicated that E. guineensis SSRs will be a powerful tool for genetic studies of the genus Elaeis, including variety identification and intra- or inter-specific genetic mapping. PCR amplification tests on a subset of 16 other palm species and allele-sequence data showed that E. guineensis SSRs are putative transferable markers across palm taxa. In addition, phenetic information based on SSR flanking region sequences makes E. guineensis SSR markers a potentially useful molecular resource for any researcher studying the phylogeny of palm taxa.Key words: Palmae, SSR, phenetic analysis, phylogeny.
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Billotte N, Risterucci AM, Barcelos E, Noyer JL, Amblard P, Baurens FC. Development, characterisation, and across-taxa utility of oil palm (Elaeis guineensis Jacq.) microsatellite markers. Genome 2001; 44:413-25. [PMID: 11444700] [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: 02/20/2023]
Abstract
The results of the development of oil palm (Elaeis guineensis Jacq.) microsatellite markers are given step by step, from the screening of libraries enriched in (GA)n, (GT)n, and (CCG)n simple-sequence repeats (SSRs) to the final characterisation of 21 SSR loci. Also published are primer sequences, estimates of allele size range, and expected heterozygosity in E. guineensis and in the closely related species E. oleifera, in which an optimal utility of the SSR markers was observed. Multivariate data analyses showed the ability of SSR markers to efficiently reveal the genetic-diversity structure of the genus Elaeis in accordance with known geographical origins and with measured genetic relationships based on previous molecular studies. High levels of allelic variability indicated that E. guineensis SSRs will be a powerful tool for genetic studies of the genus Elaeis, including variety identification and intra- or inter-specific genetic mapping. PCR amplification tests on a subset of 16 other palm species and allele-sequence data showed that E. guineensis SSRs are putative transferable markers across palm taxa. In addition, phenetic information based on SSR flanking region sequences makes E. guineensis SSR markers a potentially useful molecular resource for any researcher studying the phylogeny of palm taxa.
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Affiliation(s)
- N Billotte
- Centre de Cooperation Internationale en Recherche Agronomique pour le Développement, Montpellier, France.
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Billotte N, Risterucci A, Barcelos E, Noyer J, Amblard P, Baurens F. Development, characterisation, and across-taxa utility of oil palm ( Elaeis guineensis Jacq.) microsatellite markers. Genome 2001. [DOI: 10.1139/gen-44-3-413] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Schmutz JL, Jeanmougin M, Martin S, Amblard P, Thomas P. [Recommendations of the French Society of Photodermatology for systemic PUVA therapy in psoriasis vulgaris. French Society of Photodermatology]. Ann Dermatol Venereol 2000; 127:753-9. [PMID: 11011174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- J L Schmutz
- Service de Dermatologie, Hôpital Fournier, 36, quai de la Bataille, 54035 Nancy Cedex
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20
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Tamponnet C, Savage CJ, Amblard P, Lasserre JC, Personne JC, Germain JC. Water recovery in space. ESA Bull 1999; 97:56-60. [PMID: 11725802] [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: 02/22/2023]
Abstract
In the absence of recycling, water represents over 90% of the life-support consumables for a manned spacecraft. In addition, over 90% of the waste water generated can be classified as moderately or slightly contaminated (e.g. shower water, condensate from the air-conditioning system, etc.). The ability to recover potable water from moderately contaminated waste water hence enables significant savings to be made in resupply costs. A development model of such a water-recovery system, based on membrane technology has been produced and tested using "real waste water" based on used shower water Results indicate some 95% recovery of potable water meeting ESA standards, with total elimination of microbial contaminants such as bacteria, spores and viruses.
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Affiliation(s)
- C Tamponnet
- Thermal Control and Life Support Division, ESA Directorate for Technical and Operational Support, ESTEC, Noordwijk, The Netherlands
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21
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Lok C, Paul C, Amblard P, Bessis D, Debure C, Faivre B, Guillot B, Ortonne JP, Huledal G, Kalis B. EMLA cream as a topical anesthetic for the repeated mechanical debridement of venous leg ulcers: a double-blind, placebo-controlled study. J Am Acad Dermatol 1999; 40:208-13. [PMID: 10025747 DOI: 10.1016/s0190-9622(99)70190-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [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: 11/18/2022]
Abstract
BACKGROUND A granulating surface is important for skin grafting and healing of leg ulcers. Mechanical debridement to remove necrotic tissue often must be stopped before completion because of pain. OBJECTIVE Our purpose was to assess the effect of EMLA cream on the number of debridements required to obtain a clean ulcer and on pain during debridement and to determine its safety after repeated doses. METHODS In this randomized double-blind, placebo-controlled study, 69 patients with venous leg ulcers received cream before debridement until a clean ulcer was obtained (or a maximum of 15 debridements). RESULTS EMLA decreased the median number of debridements required for a clean ulcer (EMLA 11.5, placebo >15; P = .019) and decreased pain by 50% (P = .003). Plasma levels of lidocaine, prilocaine, and their main metabolites were low without any apparent accumulation. CONCLUSION EMLA produces effective pain relief for the debridement of leg ulcers and shortens the time to a clean ulcer.
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Affiliation(s)
- C Lok
- Department of Dermatology, Sud Hospital, Amiens, France
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22
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Amblard P. [True and false acrocyanoses]. Rev Prat 1998; 48:1665-8. [PMID: 9814068] [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: 02/09/2023]
Abstract
Acrocyanosis is an acrosyndrome frequently found among adolescent or young women. Four clinical symptoms are necessary and sufficient to establish the diagnosis: permanent and painless cyanosis of extremities, local hypothermia, permanent sweatiness, and elastic infiltration of the integument. In practice, only one investigation is useful but not indispensable: capillaroscopy which visualizes capillarovenular stasis. Numerous clinical forms have been described, but they are exceptions, but for supramalleolar erythrocyanosis. Treatment is mainly preventive: protection against cold. Two conditions can be regarded as false acrocyanosis: acrorhigosis and acroiodesis.
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Affiliation(s)
- P Amblard
- Service de dermato-phlébologie et maladies sexuellement transmissibles, Hôpital Michallon, Grenoble
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Affiliation(s)
- J L Bourrain
- Explorations Allergologiques et Photobiologiques, Service de Dermatologie, CHU de Grenoble, France
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24
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Leccia MT, Aubry-Artignan S, Brion JP, Voirin L, Beani JC, Amblard P. [Salmonella enteritidis septicemia manifesting as a suppurated thrombophlebitis]. Ann Dermatol Venereol 1998; 125:108-10. [PMID: 9747225] [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: 02/08/2023]
Abstract
BACKGROUND Non-typloid salmonella can cause septicemia and extradigestive disorders in immunodepressed adults. These frequent diseases can be life-threatening. CASE REPORT A 76-year-old woman was treated with corticosteroid therapy for 1 year for suppurated thrombophlebitis of the right greater saphenous vein. Weight loss, fever at 41 degrees C and Salmonella enterididis isolated from blood cultures and skin samples led to the diagnosis of septicemia with multiple septic foyers including the venous endothelium and surrounding soft tissue. DISCUSSION In Western countries, there has been an uprise in the frequency of low-grade salmonella infections by food poisoning usually causing acute diarrhea. S. enterididis can also cause severe infectious syndromes with multiple septic localizations, main in patients with a compromised immune reaction. In our cases, Salmonella enteritidis septecemia was revealed by an unusual situation. In the literature, inaugural signs usually involve the heart or arteries, but our patient had isolated foyers involving the superficial venous network. This is exceptional especially since there was no iatrogenic venous catheter insult. For our patient, favoring factors were the long-term corticosteroid therapy and altered venous network. The portal of entry could not be clearly identified but the discovery of a sigmoid diverticulosis would be an argument favoring a digestive origin. Medical and surgical management with resection of the necrosed tissues and two adapted antibiotics in a long-term regimen led to a successful outcome.
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Affiliation(s)
- M T Leccia
- Service de Dermatologie, CHU A. Michallon, Grenoble
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25
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Bourrain JL, Paillet C, Woodward C, Beani JC, Amblard P. Diagnosis of photosensitivity to flupenthixol by photoprick testing. Photodermatol Photoimmunol Photomed 1997; 13:159-61. [PMID: 9453086 DOI: 10.1111/j.1600-0781.1997.tb00221.x] [Citation(s) in RCA: 19] [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: 02/06/2023]
Abstract
We report the case of a 38-year-old patient with an erythematous eruption, initially confined to photo-exposed areas and then becoming more generalized, which was attributable to flupenthixol, a thioxanthene derivative used for its neuroleptic properties. The compound has the same polycyclic aromatic hydrocarbons as phenothiazines, but without any cross-reaction in our patient. A photoallergic cause for the eruption was verified on clinical, histological and photobiologic grounds. Photopatch tests were negative, but photoprick testing was positive after UV irradiation of the test site. Photopatch test methods using better skin penetration have been already reported for testing drug photosensitivity. Photoprick testing combines better penetration with greater ease of use.
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26
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Grab JJ, Dreno B, Delaunay M, Chastang C, Cupissol D, Guillot B, Souteyrand P, Sassolas B, Cesarini JP, Lyonnet S, Lok C, Mansat E, Lacour JP, Thomas L, Beylot M, Truchetet F, de la Salmoni??re P, Chemaly C, Lorette G, Meynadier J, Thyss R, Avrii MF, Prigent F, Chevrant-Breton J, Dalac S, Fargeot C, Amblard P, Schaerrer E, Thill L, Massimini G, Royer P. Long term results of an adjuvant therapy with low doses IFN-??2A in resected primary melanoma thicker than 1.5 mm without clinically detectable node metastases. Melanoma Res 1997. [DOI: 10.1097/00008390-199706001-00113] [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: 11/25/2022]
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27
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Affiliation(s)
- J L Bourrain
- Service de Derrnatologie, CHU de Grenoble, France
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28
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Bourrain JL, Béani JC, Amblard P. [Candida vasculitis]. Allerg Immunol (Paris) 1995; 27:375-6. [PMID: 8588829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Apart from direct skin attacks, yeasts of the Candida group hold a place that is much discussed in the occurrence of immuno-allergic reactions of the skin, because of their usual saprophytic characteristics. We report here on observation of a patient of 62 years who presented with a secondary purpuric maculo-papular eruption making a tri-symptom of Gougerot, for which we have incriminated the role of the immunogenicity of Candida. Skin histology confirmed the presence of an angiitis and necrotising capillarity. An intradermal test with candidine reproduced the skin symptoms and histology, whilst other microbial and fungal tests remained within normal limits. Other examinations showed the transitory presence of circulating immune complexes, although the remainder of the immunity factors were negative. A digestive focus of Candida was present. Recovery occurred after systemic mycological treatment was started, though there was a return of symptoms after a temporary initial check.
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29
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Parat MO, Richard MJ, Leccia MT, Amblard P, Favier A, Beani JC. Does manganese protect cultured human skin fibroblasts against oxidative injury by UVA, dithranol and hydrogen peroxide? Free Radic Res 1995; 23:339-51. [PMID: 7493040 DOI: 10.3109/10715769509065255] [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: 01/25/2023]
Abstract
Reactive oxygen species (ROS) are involved in the mechanism of photoaging and carcinogenesis. Skin is endowed with antioxidant enzymes including superoxide dismutases (SOD): cytosolic copper zinc SOD and mitochondrial manganese SOD. The aim of our study was to estimate the protective effect of manganese against oxidative injury on cultured human skin fibroblasts. Dithranol, hydrogen peroxide and UV-A radiation (375 nm) were employed as oxidative stressors. The supply of manganese chloride produced an increase in cellular content of this element up to 24 fold without concomitant elevation of MnSOD activity. Nevertheless, manganese protects cells against two of the three ROS generating systems assessed, namely hydrogen peroxyde and UV-A. This protective effect depends on the concentration of manganese in the medium, 0.1 mM and 0.2 mM protect against UVA cytotoxicity, only 0.2 mM protects against H2O2 cytotoxicity.
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Affiliation(s)
- M O Parat
- Laboratoire de Biochimie C, CHRU Albert Michallon, Grenoble, France
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30
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31
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Grossman RM, Thivolet J, Claudy A, Souteyrand P, Guilhou JJ, Thomas P, Amblard P, Belaich S, de Belilovsky C, de la Brassinne M. A novel therapeutic approach to psoriasis with combination calcipotriol ointment and very low-dose cyclosporine: results of a multicenter placebo-controlled study. J Am Acad Dermatol 1994; 31:68-74. [PMID: 8021375 DOI: 10.1016/s0190-9622(94)70138-5] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.2] [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
BACKGROUND Recent advances in the treatment of psoriasis include both the topical vitamin D analogue calcipotriol and cyclosporine. Combined treatments have been sought to decrease the incidence of side effects while maintaining efficacy in the treatment of severe chronic plaque psoriasis. OBJECTIVE The objective of this study was to evaluate the efficacy and safety of the combination of 2 mg/kg/day of cyclosporine with calcipotriol ointment (50 micrograms/gm) in the treatment of severe plaque psoriasis. METHODS Sixty-nine patients were randomly selected for this double-blind, multicenter study to receive cyclosporine (2 mg/kg/day) combined with calcipotriol ointment (50 micrograms/gm) or cyclosporine (2 mg/kg/day) combined with placebo ointment (vehicle of calcipotriol) for a 6-week period. RESULTS Complete clearing or 90% improvement in Psoriasis Area and Severity Index score occurred in 50.0% of patients in the calcipotriol/cyclosporine group in comparison with 11.8% of patients treated with placebo/cyclosporine (p = 0.0019). The confidence interval for the difference ranged from 17.8% to 58.7%. No difference was found between the two groups with respect to side effects. CONCLUSION The calcipotriol/cyclosporine combination was more effective than placebo/cyclosporine. Further studies are needed to establish the long-term efficacy and safety profile of this combination therapy.
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32
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Alirezai M, Dupuy P, Amblard P, Kalis B, Souteyrand P, Frappaz A, Sendagorta E. Clinical evaluation of topical isotretinoin in the treatment of actinic keratoses. J Am Acad Dermatol 1994; 30:447-51. [PMID: 8113458 DOI: 10.1016/s0190-9622(94)70054-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Retinoids have been shown to improve the manifestations of skin photodamage, including actinic keratoses. OBJECTIVE The efficacy and tolerability of isotretinoin 0.1% cream in the treatment of actinic keratoses were evaluated in a randomized, double-blind, placebo-controlled, parallel-group study. METHODS One hundred patients were randomly assigned to treatment with 0.1% cream or vehicle twice daily for 24 weeks to the face, the scalp, and the upper extremities. Patients were assessed every 4 weeks by the investigators, who counted and recorded the number of lesions in each treatment area. The 93 patients who had at least one postbaseline assessment were included for efficacy analysis. Local tolerability was evaluated at each study visit. RESULTS On the face, the reduction in number of actinic keratoses (mean +/- SEM) at the end of treatment was greater for patients treated with isotretinoin (3.9 +/- 0.6, i.e., 66% of patients with a reduction > 30%) than with placebo (1.7 +/- 0.5, i.e., 45% of patients with a reduction > 30%); this difference was statistically significant (p = 0.001). No significant drug effect was seen for lesions on the scalp or upper extremities. Mild to moderate local reactions with isotretinoin abated with reduced treatment frequency. CONCLUSION Our results suggest that isotretinoin 0.1% cream cannot compete with more rapid treatments of actinic keratoses. However, its effect on facial lesions may be beneficial during long-term treatment of associated sun-damaged skin.
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Affiliation(s)
- M Alirezai
- Department of Dermatology, Hôpital Saint Charles, Montpellier, France
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33
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Bonnot D, Béani JC, Boitard M, Reymond JL, Bériel H, Amblard P. Determination of 8-methoxypsoralen kinetics: a relevant factor in the treatment of psoriasis by psoralen plus ultraviolet A therapy. Photodermatol Photoimmunol Photomed 1994; 10:33-7. [PMID: 8180098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We compared the efficacy of psoralen plus ultraviolet A (UVA) therapy in 2 groups of psoriatic patients: a group of patients treated by a protocol adapted to the results of 8-methoxypsoralen (8-MOP) plasma kinetics (kinetics group) versus a control group of patients treated according to Pathak's standard protocol (UVA exposure 2 h after oral administration of a dose of 8-MOP equal to 0.6 mg/kg) (control group). The 8-MOP plasma kinetics were determined before the beginning of treatment. The parameter for comparison is the rapidity of clearing, taking into account the number of UVA exposures and UVA joules received. The analysis of the results observed show a 26.6% decrease in the number of UVA exposures and a 38.4% decrease in the dose of UVA received. These results are confirmed by the individual analysis of the rapidity with which the clearance of psoriatic lesions was obtained in patients who were treated with the standard PUVA protocol during the first attack and with the adapted protocol during the second attack.
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Affiliation(s)
- D Bonnot
- Laboratory of Physiology and Pharmacology I, UFR of Pharmacy La Tronche, France
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34
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Leccia MT, Richard MJ, Beani JC, Faure H, Monjo AM, Cadet J, Amblard P, Favier A. Protective effect of selenium and zinc on UV-A damage in human skin fibroblasts. Photochem Photobiol 1993; 58:548-53. [PMID: 8248330 DOI: 10.1111/j.1751-1097.1993.tb04930.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Ultraviolet A radiation participates in cytotoxicity and carcinogenesis of the skin by a mechanism involving the generation of reactive oxygen species. Endogenous antiradical defense systems utilize metalloenzymes including Se-dependent glutathione peroxidase and Cu and Zn superoxide dismutase. The aim of the present work was to determine the protective effect of two trace elements, Se and Zn, on cultured human diploid fibroblasts exposed to UV-A radiation (broad-spectrum source with a maximum intensity at 375 nm). Selenium in the culture medium (0.1 mg/L) in the form of sodium selenite increased the synthesis and activity of glutathione peroxidase by 60.5% in the absence of exposure to UV-A radiation and by 35% after irradiation with 5 J/cm2 (P = 0.043). The presence of this element significantly increased the survival of UV-A-irradiated fibroblasts (P < 0.0001). This confirms the essential role of Se in the detoxifying activity of the enzyme. In addition, thiobarbituric acid-reacting substances (TBAR), which are lipid peroxidation markers, decreased in the presence of exogenous Se: -19% and -22% without irradiation and after irradiation with 5 J/cm2 (P = 0.056). When Zn was added at the dose of 6.5 mg/L as ZnCl2, fibroblasts subjected to oxidizing stress induced by UV-A were protected from cytotoxicity (P < 0.0001). The TBAR production decreased significantly: -33% without irradiation and -34% after irradiation with 5 J/cm2 (P = 0.008). Superoxide dismutase activity, however, decreased after supplementing with Zn: -26% without irradiation and -20% after UV-A irradiation (P = 0.017). The antioxidant properties of Zn are thus apparently independent of superoxide dismutase activity.
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Affiliation(s)
- M T Leccia
- Laboratoire de Recherche Photobiologique en Dermatologie, Centre Hospitalier Régional Universitaire A. Michallon, Grenoble, France
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35
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Amblard P. [Cutaneo-mucous herpes. Epidemiology, physiopathology, diagnosis, development, treatment]. Rev Prat 1993; 43:1019-22. [PMID: 8341967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- P Amblard
- Clinique de dermatologie, CHRU de Grenoble
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36
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Amblard P. [Psoriasis. Diagnosis, clinical course, prognosis, treatment]. Rev Prat 1993; 43:229-31. [PMID: 8502946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- P Amblard
- Clinique de dermatologie, CHRU de Grenoble
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37
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Sarrot-Reynauld F, Massot C, Amblard P, Rousset H, Da Costa A, Vital-Durand D, Ninet J, Decousus H. [Systemic mastocytosis: incidence and risks of vasomotor seizures]. Rev Med Interne 1993; 14:1034. [PMID: 7516568 DOI: 10.1016/s0248-8663(05)80151-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We report on 9 cases of systemic mastocytosis which underline the frequency and the potential severity of this disease. All patients had intercritical signs (usually urticaria). Seven patients had also typical crises with flush and vascular collapses are observed together, doctors should measure histamine blood level and perform correct biopsy.
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38
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Amblard P, Leccia MT. [Skin diseases with photosensitivity]. Rev Prat 1992; 42:1365-8. [PMID: 1529248] [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: 12/27/2022]
Abstract
Skin diseases associated with photosensitivity are numerous and may be divided into three main groups: photo-aggravated dermatoses, genophotodermatoses and metabolic photodermatoses. Photo-aggravated dermatoses are autonomous skin diseases in which exposure to sunlight may make the disease worse or precipitate its onset and/or its progressiveness; this group includes lupus erythematosus, autoimmune bullous diseases, acantolytic dyskeratoses, acne vulgaris, rosacea and cutaneous lymphoid infiltrates. To these must be added photosensitive forms of autonomous dermatoses such as atopic dermatitis, psoriasis, herpes labialis, erythema multiforme, granuloma and disseminated superficial actinic porokeratosis. Genophotodermatoses are genodermatoses which are made photosensitive by a recognized or as yet unidentified deficiency of the natural photoprotection system. In this group are albinism, vitiligo, xeroderma pigmentosum and poikiloderma. Metabolic photodermatoses are diseases in which photosensitization reactions, often revealing, are due to the accumulation in the skin of an endogenous chromophore as a result of a congenital (porphyria) or acquired (pellagra) enzymatic disorder.
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Affiliation(s)
- P Amblard
- Clinique de dermatophlébologie, hôpital A.-Michallon, Grenoble
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39
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Leonard F, Morel M, Kalis B, Amblard P, Avenel-Audran M, Beani JC, Bonnetblanc JM, Leroy D, Marguery MC, Peyron JL. Psoralen plus ultraviolet A in the prophylactic treatment of benign summer light eruption. Photodermatol Photoimmunol Photomed 1991; 8:95-8. [PMID: 1804294] [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: 12/28/2022]
Abstract
We report the results of a French multicentre study to evaluate the efficiency of psoralen plus ultraviolet A (PUVA) therapy in the prophylactic treatment of benign summer light eruption (BSLE) and to establish the optimal protocol of radiation. Nine photobiology centres took part in this study; 83 patients (76 of them women) were evaluated. The radiation protocols were as follows: oral psoralen (8-methoxypsoralen; 0.6 mg/kg) was taken at each session; the starting dose of UVA radiation was determined according to skin type, with increments of 0.5 J/cm2 every 2 sessions. The subjects were randomized to receive 10-20 sessions 3 times per week. PUVA therapy was very effective: 68 patients (82%) reported total protection from BSLE. Four patients (5%) showed progress. Only 13% showed no improvement. The satisfactory results were not correlated with either the number of sessions or the J/cm2 of UVA. The intensity of tanning after the PUVA sessions did not appear to predict cure. Thirty-six percent of the patients had adverse reactions to treatment, including erythema, pruritus and triggering of BSLE. However, these effects only required the treatment to be stopped in 2% of the cases (for severe pruritus). The results in the various centres were similar.
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Affiliation(s)
- F Leonard
- Department of Dermatology, University of Reims, France
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40
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Vidal C, Girard PM, Dompmartin D, Bosson JL, Mettra C, Groslambert P, Coulaud JP, Amblard P. Seborrheic dermatitis and HIV infection. Qualitative analysis of skin surface lipids in men seropositive and seronegative for HIV. J Am Acad Dermatol 1990; 23:1106-10. [PMID: 2148754] [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: 12/30/2022]
Abstract
We measured skin surface lipids (cholesterol, free fatty acids, triglycerides, wax esters, and squalene) in patients seropositive for human immunodeficiency virus (HIV) and those seronegative for HIV with and without seborrheic dermatitis. Cholesterol and wax ester fractions were similar in all four groups but triglycerides and squalene were significantly increased and free fatty acids significantly decreased in HIV-positive patients, regardless of the presence of seborrheic dermatitis. In addition, a strong negative correlation was found between free fatty acid and triglyceride levels. We conclude that abnormalities of skin surface lipids are not associated with the development of seborrheic dermatitis in HIV-positive persons but are associated with HIV infection itself.
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Affiliation(s)
- C Vidal
- Department of Dermatology, Centre Hospitalier Universitaire de Grenoble, France
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41
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Reymond JL, Amblard P. [Seborrheic dermatitis. A century of controversy]. Presse Med 1990; 19:1030-1. [PMID: 2141155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Amblard P. [Acne. Physiopathology, clinical aspects, treatment]. Rev Prat 1990; 40:662-4. [PMID: 2139236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- P Amblard
- Clinique dermato-syphiligraphique CHRU, Grenoble
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43
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Abstract
A case-control study was undertaken in order to test the relationship between commonly used anti-inflammatory agents and the efficacy of intra-uterine devices (IUDs). Women who had become pregnant while wearing an IUD were compared with non-pregnant IUD users. 717 cases and 717 controls were recruited from the same medical practices. The case-women (IUD failure) used anti-inflammatory drugs, particularly aspirin, more frequently than the controls (p less than 0.001). In contrast, oral progestins, taken in the second part of the cycle (16th to 25th day) were more frequently used by the control-women group (p less than 0.001). Although cases and controls differed in age and gravidity (younger and higher, respectively) standardization for these items did not change the findings for drug use.
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Affiliation(s)
- E Papiernik
- Unité de Recherches en Physiologie et Psychologie de la Reproduction Humaine, INSERM U 187, Hôpital Antoine Béclère, Clamart, France
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44
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Beani JC, Reymond JL, Amblard P. [Photoprotection in children]. Ann Pediatr (Paris) 1988; 35:361-6. [PMID: 3400969] [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: 01/05/2023]
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Reymond JL, Beani JC, Racinet H, Bonnot D, Beriel H, Amblard P. Comparative pharmacokinetics of 8-MOP in serum and in suction blister fluid. Photodermatol 1988; 5:51-2. [PMID: 3353318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- J L Reymond
- Department of Dermatology, C.H.U.R. Grenoble, France
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Saurat JH, Geiger JM, Amblard P, Beani JC, Boulanger A, Claudy A, Frenk E, Guilhou JJ, Grosshans E, Mérot Y, Meynadier J, Tapernoux B. Randomized double-blind multicenter study comparing acitretin-PUVA, etretinate-PUVA and placebo-PUVA in the treatment of severe psoriasis. Dermatologica 1988; 177:218-24. [PMID: 2976000 DOI: 10.1159/000248567] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A randomized double-blind study was designed with 65 patients in order to clarify two points: (1) does addition of a retinoid to psoralen-ultra violet A photochemotherapy (PUVA) of severe psoriasis decrease the UVA energy required to achieve remission, and (2) is there a difference between two retinoids, i.e. etretinate and acitretin. Acitretin-PUVA treatment was significantly superior to placebo-PUVA with respect to several items (decrease in lesional scores after 6 weeks of therapy, number of PUVA exposures, and total dose of UVA until remission). There were also differences between the etretinate-PUVA and placebo-PUVA groups, but only the decrease in lesional scores reached statistical significance.
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Affiliation(s)
- J H Saurat
- Department of Dermatology, University Hospital of Geneva, Switzerland
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Abstract
In a double blind randomised investigation in 76 patients, roxithromycin (150 mg bd) and doxycycline (200 mg once daily) were compared in two groups of patients who were well-matched for age, sex, body weight, diagnosis, duration and severity of disease and associated pathological conditions, with infected skin conditions. Clinical effectiveness was 92% for roxithromycin and 82% for doxycycline, and bacteriological effectiveness also 92% and 82% respectively, the differences not being statistically significant.
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Affiliation(s)
- P Agache
- University Department of Dermatology, Hôpital St-Jacques, Besançon, France
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Abstract
Three phototherapeutic regimens with photosensitization are now used in dermatology: PUVA (psoralen + UVA), TUV (crude coaltar + UV), PRT (phototherapy with hematoporphyrin derivative). The efficiency of PUVA and TUV is well known in several dermatoses. PRT is now being tested experimentally. For TUV, the lack of a standardized regimen does not allow a clear-cut evaluation of the therapy. For PUVA, late side-effects, particularly carcinogenicity have to be considered. To improve efficiency and minimize the side-effects of PUVA some procedures, such as association with retinoïds, pharmaco-kinetic studies for individual adaptation of the therapeutic regimen and the use of new less mutagenic psoralens are helpful. The persistent phototoxicity following treatments with hematoporphyrin derivative constitutes the major side-effect observed, for this phototherapy.
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Bolla K, Djawari D, Kokoschka EM, Petres J, Lidén S, Gonseth R, Amblard P, Bernengo MG, Bonerandi JJ, Claudy A. Prevention of recurrences in frequently relapsing herpes labialis with thymopentin. A randomized double-blind placebo-controlled multicenter study. Surv Immunol Res 1985; 4 Suppl 1:37-47. [PMID: 3898291 DOI: 10.1007/bf02919055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The present randomized, placebo-controlled double-blind multicenter study included a population of 36 subjects with frequent recurrences (at least once a month) of herpes labialis. Most of the patients had failed to respond adequately to previous treatment with other therapeutic tools, including acyclovir. Either 50 mg of thymopentin or of placebo was administered 3 times a week, by the subcutaneous route, for 6 weeks. Subsequently, the patients were observed for nearly 6 months on the average. The results achieved with thymopentin for the individual parameters were significantly superior to those obtained with placebo; thus significant improvement was seen in patients on thymopentin in the duration of the longest symptomfree period (prolonged from 2.1 weeks to 20.9 weeks, p = 0.000), in the number of relapses (reduced from 1.6 to 0.4 episodes/month, p = 0.001), and in the total duration of herpes symptoms per month (shortened from 2.0 to 0.3 weeks, p = 0.000). Placebo treatment also resulted in considerable improvement (p less than 0.05 or 0.01), but was significantly inferior to the improvement obtained with thymopentin. The longest symptomfree period in the placebo group was prolonged from 2.4 to 11.2 weeks. The number of relapses per month was reduced from 1.4 to 0.8, and the total duration of herpes symptoms per month from 2 to 0.9 weeks. The results of intergroup analyses, in which the observed parameters and the improvement achieved in either group were compared, significantly favored thymopentin treatment. The effect of thymopentin was in all but one parameters superior to that of placebo and highly significant (p less than 0.01).
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Bonnot D, Beani JC, Beriel H, Boitard M, Amblard P, Reymond JL. Influence of the diet on the plasma kinetics of 8-methoxypsoralen. Dermatologica 1985; 171:442-5. [PMID: 4092799 DOI: 10.1159/000249470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The plasma kinetics of 8-methoxypsoralen (8-MOP) have been determined in 103 patients treated by PUVA in the routine conditions in which PUVA therapy is carried out in hospital. 8-MOP is taken with breakfast; four types of breakfast were available, which differed by their lipid content; this study showed that the diet has no influence on the bioavailability of 8-MOP.
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