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Tregear JW, Richaud F, Collin M, Esbelin J, Parrinello H, Cochard B, Nodichao L, Morcillo F, Adam H, Jouannic S. Micro-RNA-Regulated SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE (SPL) Gene Expression and Cytokinin Accumulation Distinguish Early-Developing Male and Female Inflorescences in Oil Palm (Elaeis guineensis). Plants 2022; 11:plants11050685. [PMID: 35270155 PMCID: PMC8912876 DOI: 10.3390/plants11050685] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 11/16/2022]
Abstract
Sexual differentiation of inflorescences and flowers is important for reproduction and affects crop plant productivity. We report here on a molecular study of the process of sexual differentiation in the immature inflorescence of oil palm (Elaeis guineensis). This species is monoecious and exhibits gender diphasy, producing male and female inflorescences separately on the same plant in alternation. Three main approaches were used: small RNA-seq to characterise and study the expression of miRNA genes; RNA-seq to monitor mRNA accumulation patterns; hormone quantification to assess the role of cytokinins and auxins in inflorescence differentiation. Our study allowed the characterisation of 30 previously unreported palm MIRNA genes. In differential gene and miRNA expression studies, we identified a number of key developmental genes and miRNA-mRNA target modules previously described in relation to their developmental regulatory role in the cereal panicle, notably the miR156/529/535-SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE (SPL) gene regulatory module. Gene enrichment analysis highlighted the importance of hormone-related genes, and this observation was corroborated by the detection of much higher levels of cytokinins in the female inflorescence. Our data illustrate the importance of branching regulation within the developmental window studied, during which the female inflorescence, unlike its male counterpart, produces flower clusters on new successive axes by sympodial growth.
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Affiliation(s)
- James W. Tregear
- DIADE, University of Montpellier, CIRAD, IRD, 34394 Montpellier, France; (M.C.); (J.E.); (F.M.); (H.A.); (S.J.)
- Correspondence:
| | - Frédérique Richaud
- CIRAD, UMR AGAP, 34398 Montpellier, France;
- AGAP, University of Montpellier, CIRAD, INRAE, Institut Agro, 34398 Montpellier, France
| | - Myriam Collin
- DIADE, University of Montpellier, CIRAD, IRD, 34394 Montpellier, France; (M.C.); (J.E.); (F.M.); (H.A.); (S.J.)
| | - Jennifer Esbelin
- DIADE, University of Montpellier, CIRAD, IRD, 34394 Montpellier, France; (M.C.); (J.E.); (F.M.); (H.A.); (S.J.)
| | - Hugues Parrinello
- MGX-Montpellier GenomiX, University of Montpellier, CNRS, INSERM, 34094 Montpellier, France;
| | | | | | - Fabienne Morcillo
- DIADE, University of Montpellier, CIRAD, IRD, 34394 Montpellier, France; (M.C.); (J.E.); (F.M.); (H.A.); (S.J.)
- CIRAD, UMR DIADE, 34394 Montpellier, France
| | - Hélène Adam
- DIADE, University of Montpellier, CIRAD, IRD, 34394 Montpellier, France; (M.C.); (J.E.); (F.M.); (H.A.); (S.J.)
| | - Stefan Jouannic
- DIADE, University of Montpellier, CIRAD, IRD, 34394 Montpellier, France; (M.C.); (J.E.); (F.M.); (H.A.); (S.J.)
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Gutiérrez-García G, Martínez C, Boumendil A, Finel H, Malladi R, Afanasyev B, Tsoulkani A, Wilson KMO, Bloor A, Nikoloudis M, Richardson D, López-Corral L, Castagna L, Cornelissen J, Giltat A, Collin M, Fanin R, Bonifazi F, Robinson S, Montoto S, Peggs KS, Sureda A. Long-term outcome of patients receiving haematopoietic allogeneic stem cell transplantation as first transplant for high-risk Hodgkin lymphoma: a retrospective analysis from the Lymphoma Working Party-EBMT. Br J Haematol 2021; 196:1018-1030. [PMID: 34750806 DOI: 10.1111/bjh.17939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 11/30/2022]
Abstract
We analysed long-term outcome of patients receiving haematopoietic allogeneic stem cell transplantation (allo-HSCT) as a first transplant for high-risk Hodgkin lymphoma (HL). One hundred and ninety patients were included in this study, 63% of them had previously received brentuximab vedotin and/or checkpoint inhibitors. Seventy patients (37%) received an unrelated donor allo-HSCT, 99 (51%) had myeloablative conditioning (MAC) and 60% had in vivo T-cell/depleted grafts (TCD). The 100-day cumulative incidence (CI) of grade II-IV acute graft-versus-host disease (GVHD) was 25% and the 3-year CI of chronic GVHD was 38%. The 3-year CI of non-relapse mortality (NRM) and relapse rate were 21% and 38% respectively. After a median follow-up of 58 months, 3-year overall survival (OS) and progression-free survival (PFS) were 58% and 41% respectively. Multivariate analysis showed that, in comparison to reduced-intensity conditioning regimens with or without TCD, MAC using TCD had similar NRM and a lower risk of relapse leading to significantly better OS and PFS. MAC without TCD was associated with higher NRM and worse survival outcomes. These results suggest that in patients with high-risk HL and candidates of allo-HSCT, a MAC strategy with TCD might be the best option.
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Affiliation(s)
- G Gutiérrez-García
- Department of Haematology, Bone Marrow Transplantation Unit, Hospital Clinic of Barcelona, University of Barcelona, Institut de Recerca Biomèdica August Pi i Sunyer, Barcelona, Spain
| | - C Martínez
- Department of Haematology, Bone Marrow Transplantation Unit, Hospital Clinic of Barcelona, University of Barcelona, Institut de Recerca Biomèdica August Pi i Sunyer, Barcelona, Spain
| | | | - H Finel
- Lymphoma Working Party, EBMT, Paris, France
| | - R Malladi
- School of Cancer Sciences, University of Birmingham, Centre for Clinical Haematology, Queen Elizabeth NHS Foundation Trust, Birmingham, UK
| | - B Afanasyev
- State Medical Pavlov University, St. Petersburg, Russia
| | | | | | - A Bloor
- Haematology and Transplant Unit, Christie Hospital NHS Foundation Trust and University of Manchester, Manchester, UK
| | - M Nikoloudis
- Haematology Department Heart of England NHS Trust, Birmingham, UK
| | - D Richardson
- Department of Haematology, Southampton General Hospital, Southampton, UK
| | | | - L Castagna
- Department of Haematology, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - J Cornelissen
- Erasmus MC Cancer Institute University Medical Centre Rotterdam Department of Haematology, Rotterdam, Netherlands
| | - A Giltat
- Department of Haematology, Medical University Hospital, Angers, France
| | | | - R Fanin
- Department of Haematology and Cellular Therapy 'Carlo Melzi', S. Maria della Misericordia University Hospital, DAME, University of Udine, Udine, Italy
| | - F Bonifazi
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, University of Bologna, Bologna, Italy
| | - S Robinson
- Department of Haematology and Oncology, Bristol University Hospital, Bristol, UK
| | - S Montoto
- St. Bartholomew's Hospital, Barts Health NHS Trust, London, UK
| | - K S Peggs
- Department of Haematology, University College London Cancer Institute, London, UK
| | - A Sureda
- Clinical Department of Haematology, Institut Català d'Oncologia-Hospitalet, IDIBELL, University of Barcelona, Barcelona, Spain
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Morcillo F, Serret J, Beckers A, Collin M, Tisné S, George S, Poveda R, Louise C, Tranbarger TJ. A Non-Shedding Fruit Elaeis oleifera Palm Reveals Perturbations to Hormone Signaling, ROS Homeostasis, and Hemicellulose Metabolism. Genes (Basel) 2021; 12:1724. [PMID: 34828330 PMCID: PMC8621672 DOI: 10.3390/genes12111724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
The developmentally programmed loss of a plant organ is called abscission. This process is characterized by the ultimate separation of adjacent cells in the abscission zone (AZ). The discovery of an American oil palm (Elaeis oleifera) variant that does not shed its has allowed for the study of the mechanisms of ripe fruit abscission in this species. A comparative transcriptome analysis was performed to compare the fruit AZs of the non-shedding E. oleifera variant to an individual of the same progeny that sheds its ripe fruit normally. The study provides evidence for widespread perturbation to gene expression in the AZ of the non-shedding variant, compared to the normal fruit-shedding control, and offers insight into abscission-related functions. Beyond the genes with known or suspected roles during organ abscission or indehiscence that were identified, a list of genes with hormone-related functions, including ethylene, jasmonic acid, abscisic acid, cytokinin and salicylic acid, in addition to reactive oxygen species (ROS) metabolism, transcriptional responses and signaling pathways, was compiled. The results also allowed a comparison between the ripe fruit abscission processes of the African and American oil palm species at the molecular level and revealed commonalities with environmental stress pathways.
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Affiliation(s)
- Fabienne Morcillo
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
- CIRAD, UMR (Unité Mixte de Recherche) DIADE, 34398 Montpellier, France
| | - Julien Serret
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Antoine Beckers
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Myriam Collin
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Sebastien Tisné
- CIRAD, UMR AGAP (Amélioration Génétique et Adaptation des Plantes Méditerranéennes et Tropicales), 34398 Montpellier, France;
- AGAP, University of Montpellier, CIRAD, INRAE (Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement), Institut Agro, 34398 Montpellier, France
| | - Simon George
- MGX-Montpellier GenomiX, University of Montpellier, CNRS (Centre National de la Recherche Scientifique), INSERM (Institut National de la Santé et de la Recherche Médicale), 34094 Montpellier, France;
| | - Roberto Poveda
- DANEC, Sangolqui/Rumiñahui, Sangolquí, Pichincha 171102, Ecuador;
| | | | - Timothy John Tranbarger
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
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Hosni H, Diallo A, Morcillo F, Vaissayre V, Collin M, Tranchant-Dubreuil C, Dussert S, Joët T, Castaño F, Marquínez X, Stauffer FW, Hodel DR, Castillo Mont JJ, Adam H, Jouannic S, Tregear JW. Redox-related gene expression and sugar accumulation patterns are altered in the edible inflorescence produced by the cultivated form of pacaya palm (Chamaedorea tepejilote). Ann Bot 2021; 128:231-240. [PMID: 33978714 PMCID: PMC8324030 DOI: 10.1093/aob/mcab060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 05/07/2021] [Indexed: 05/23/2023]
Abstract
BACKGROUND AND AIMS The pacaya palm is a dioecious neotropical palm species that is exploited in Latin America for its male inflorescence, which is edible when immature. It is cultivated, in a non-intensive manner, in Guatemala, where a morphotype occurs that produces much larger, more highly branched inflorescences compared with wild palms. We sought to identify molecular factors underlying this phenotypic divergence, which is likely to be a product of domestication. METHODS We performed RNA-seq-based studies on immature pacaya palm male inflorescences in order to identify genes that might be directly or indirectly affected in their expression in relation to domestication. We also measured the accumulation of a range of soluble sugar molecules to provide information on the biochemical status of the two different types of material. KEY RESULTS A total of 408 genes were found to display significantly different expression levels between the wild and cultivated morphotypes. Three different functional categories were found to be enriched in the gene set that was upregulated in the cultivated morphotype: redox balance; secondary metabolism; and transport. Several sugars were found to accumulate at higher levels in inflorescences of the cultivated morphotype, in particular myo-inositol, fructose and glucose. CONCLUSIONS The observed upregulation of redox-related genes in the cultivated morphotype is corroborated by the observation of higher myo-inositol accumulation, which has been shown to be associated with enhanced scavenging of reactive oxygen species in other plants and which may affect meristem activity.
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Affiliation(s)
- Hanene Hosni
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | - Abdoulaye Diallo
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | - Fabienne Morcillo
- CIRAD, DIADE, Montpellier, France
- DIADE, Université de Montpellier, Institut de Recherche pour le Développement, Montpellier, France
| | - Virginie Vaissayre
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | - Myriam Collin
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | | | - Stéphane Dussert
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | - Thierry Joët
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | - Felipe Castaño
- Universidad Industrial de Santander, Escuela de Biología, Calle, Bucaramanga, Colombia
| | - Xavier Marquínez
- Universidad Nacional de Colombia, Departamento de Biología, Carrera, Bogotá, Colombia
| | - Fred W Stauffer
- Conservatoire et Jardin botaniques de la Ville de Genève, Université de Genève, Laboratoire de Systématique Végétale et Biodiversité, Chambésy, Switzerland
| | - Donald R Hodel
- University of California, Cooperative Extension, Alhambra, CA, USA
| | | | - Hélène Adam
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | - Stefan Jouannic
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
| | - James W Tregear
- Institut de Recherche pour le Développement (IRD), UMR DIADE, Université de Montpellier, Montpellier, France
- For correspondence. E-mail
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Sriwichai W, Collin M, Avallone S. Partial disintegration of vegetable cell wall during cooking improves vitamin K1 (Phylloquinone) bioaccessibility in in vitro digestion. INT J VITAM NUTR RES 2021; 91:439-450. [PMID: 34134516 DOI: 10.1024/0300-9831/a000717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Vegetables rich in vitamin K consumption could prevent bleeding and maintain bone status. The aims of the present work were to investigate i) the effect of household cooking (i.e., boiling for 5 min at 100 °C in distilled water and stir-frying for 3 min at 180 °C in hot canola oil) on phylloquinone bioaccessibility of five rich phylloquinone leafy vegetables, namely Water spinach (Ipomoea aquatic Forssk), Amaranth (Amaranthus blitum subsp. oleraceus L.), Chinese broccoli (Brassica alboglabra), Pak choi (Brassica rapa L.) and Drumstick (Moringa oleifera Lam.), and ii) the structural changes of these leaves before and after in vitro gastro-intestinal digestion. All the experiments were realized in triplicate for each vegetable. The amounts of phylloquinone in leafy vegetables were noticeable in almost all species and ranged from 94 to 182 μg/100 g DM. Their cell wall polysaccharide contents greatly varied from 4.3 to 8.4 g for 100 g. The content in bioaccessible phylloquinone was low in raw leaves (<25 μg/100 g DM) as well as its bioaccessibility (<15%). Leaf pectin content impaired phylloquinone bioaccessibility using principal component analysis. Boiling and stir-frying significantly improved the bioaccessibility of phylloquinone in leaves by a factor of three to twelve and two to seven respectively (p<0.05). These variations were associated with changes in leaf structure. Palisade and spongy cells appeared ruptured and disorganized after stir-frying. Given the estimated bioaccessibility of phylloquinones, the consumption of 500 g of cooked wet leaves per day would cover phylloquinone needs of an individual adult average body weight.
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Affiliation(s)
- Wichien Sriwichai
- Faculty of Agro-Industry, Department of Innovation and Technology of Product Development, King Mongkut's University of Technology North Bangkok, Prachinburi, Thailand
| | - Myriam Collin
- Institut de Recherche pour le Développement, UMR DIADE 2, IRD/CIRAD F2F-Palmiers, IRD, Montpellier, France
| | - Sylvie Avallone
- UMR QualiSud, Université de Montpellier, CIRAD, Institut Agro, Université d'Avignon, Université de la Réunion, Montpellier, France
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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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da Silva Cordeiro L, Collin M, Callado CH, Simões-Gurgel C, Albarello N, Engelmann F. Long-term conservation of Tarenaya rosea (Cleomaceae) root cultures: histological and histochemical analyses during cryopreservation using the encapsulation-vitrification technique. Protoplasma 2020; 257:1021-1033. [PMID: 32040626 DOI: 10.1007/s00709-020-01486-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 01/28/2020] [Indexed: 06/10/2023]
Abstract
Adventitious root cultures of Tarenaya rosea were successfully cryopreserved using the encapsulation-vitrification technique. Histological analysis revealed useful information on the successive steps of cryopreservation. Coupled with complementary histochemical approaches, these studies provided cellular and tissue descriptions of T. rosea root cultures during cryopreservation and contributed to an understanding of cellular stress responses, as well as characterization of the anatomical pattern of root regeneration. The effects of exposure duration to PVS3 solution (0-120 min), unloading treatment (direct and gradual), and recovery medium (liquid and solid) on recovery of cryopreserved roots were investigated. The highest recovery (91%) after cooling in liquid nitrogen (LN) was reached with PVS3 treatment for 90 min, gradual rehydration in unloading solution, and recovery on solid MS medium. The cryopreserved roots showed high multiplication capacity, which was maintained for up to four subcultures. The effect of cryopreservation on root structure was investigated by histological and histochemical studies. Plasmolysis intensified during exposure to loading and PVS3 solutions, but decreased after unloading treatment. The proportion of intercellular spaces increased progressively throughout the cryopreservation protocol, culminating in root cortex disruption. Histochemical analyses revealed polysaccharides, proteins, and both lipidic and pectic substances in intercellular spaces. The vascular cylinder remained intact, ensuring the formation of new roots from the pericycle, showing that proliferative capacity of cryopreserved roots had not diminished.
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Affiliation(s)
- Lívia da Silva Cordeiro
- Núcleo de Biotecnologia Vegetal (NBV), Instituto de Biologia Roberto Alcantara Gomes (IBRAG), Universidade do Estado do Rio de Janeiro (UERJ), Rua São Francisco Xavier, 524, PHLC, sala 509, Rio de Janeiro, RJ, 20550-013, Brazil.
| | - Myriam Collin
- Institut de Recherche pour le Développement (IRD), 911 Avenue Agropolis, BP 64501, 34394, Montpellier, France
| | - Cátia Henriques Callado
- Laboratório de Anatomia Vegetal (LAV), Departamento de Biologia Vegetal, Instituto de Biologia Roberto Alcantara Gomes (IBRAG), Universidade do Estado do Rio de Janeiro (UERJ), Rua São Francisco Xavier, 524, PHLC, sala 225, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Claudia Simões-Gurgel
- Núcleo de Biotecnologia Vegetal (NBV), Instituto de Biologia Roberto Alcantara Gomes (IBRAG), Universidade do Estado do Rio de Janeiro (UERJ), Rua São Francisco Xavier, 524, PHLC, sala 509, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Norma Albarello
- Núcleo de Biotecnologia Vegetal (NBV), Instituto de Biologia Roberto Alcantara Gomes (IBRAG), Universidade do Estado do Rio de Janeiro (UERJ), Rua São Francisco Xavier, 524, PHLC, sala 509, Rio de Janeiro, RJ, 20550-013, Brazil
| | - Florent Engelmann
- Institut de Recherche pour le Développement (IRD), 08 BP 841, Cotonou, Benin
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Tariq F, Alobaidi B, Xavier M, Mccorkindale M, Veltman J, Isaacs J, Pratt A, Anderson A, Collin M. THU0026 CLONAL HAEMATOPOIESIS ASSOCIATED SOMATIC MUTATIONS IN RHEUMATOID ARTHRITIS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Clonal haematopoiesis of indeterminate potential (CHIP) occurs when somatic mutations arise in myeloid neoplasia driver genes of haematopoietic progenitor cells, in the absence of overt cytopenia or dysplasia. The prevalence of CHIP increases with age. The most common genes affected by CHIP mutations in unselected populations are DNMT3A, ASXL1, and TET2. The presence of CHIP is linked to increased basal level of inflammation and a high risk of cardiovascular disease and all-cause mortality. Rheumatoid arthritis (RA) is one of the most common and debilitating multi-system autoimmune disorders, affecting up to 1% of adults in developed countries. The role of somatic mutations in the pathogenesis of autoimmune diseases is an unexplored area; therefore, we aimed to test the hypothesis that clonal haematopoiesis (CH) is associated with the incidence and severity of RA.Objectives:To evaluate the association of CH somatic mutation with severity of RA.Methods:163 RA patients were recruited from the following cohorts: (i)Early RA/treatment naive (n=31), (ii)Refractory RA - non-responders to Disease-Modifying Anti-Rheumatic Drugs (DMARDs) and biologics (n=48), (ii)Flare (n=41) vsRemission patients (n=43) –patients treated with DMARDs and withdrawn from treatment on achieving remission. Six months later, 50% relapse and 50% sustain remission. Single molecule molecular inversion probes (smMIPs) were used to screen for somatic mutations in 40 loci known to carry clonal haematopoiesis driver mutations (CHDMs). Whole exome sequencing was also performed on Flare/Remission patients (n = 84) to screen for CHDMs and other somatic mutations. In-house bioinformatics pipelines were used to call mutations from both the datasets.Results:We identified CH in RA with an overall prevalence of 14%. Twenty-four unique variants with a variant allele frequency (VAF) of 2-35% were found in ten genes including ASXL1, CBL, DNMT3A, GNAS, GNB1, PTPN11, PTPN12, SF3B1, TET2, and TP53. The number of unique patients carrying mutations in these genes are follows:refractory: n=12/48, flare: n=6/41,remission: n=4/43 andearly RA: n=2/31. The majority of the mutations occurred in DNMT3A (n=6) followed by TP53 (N=4) and TET2 (n=3). Two variants with VAF of 15% were identified in two patients under the age of 30, both with clinically severe disease. In patients between the ages of 50-59 yrs., 60-69 yrs., and 70-79 yrs., CH was observed at 11% (4/35), 23% (11/46) and 17%(7/41), respectively.Conclusion:We here report the prevalence of CH in RA, affecting more patients with clinically advanced/refractory disease compared to those with early/less severe disease.Further study will be conducted to confirm the results.References:[1]Acuna-Hidalgo, R., Sengul, H., Steehouwer, M., van de Vorst, M., Vermeulen, S., & Kiemeney, L. et al. (2017). Ultra-sensitive Sequencing Identifies High Prevalence of Clonal Hematopoiesis-Associated Mutations throughout Adult Life.The American Journal Of Human Genetics,101(1), 50-64. doi: 10.1016/j.ajhg.2017.05.013[2]NRAS - National Rheumatoid Arthritis Society. (2020). Retrieved 30 January 2020, fromhttps://www.nras.org.uk/what-is-ra-article[3]Steensma, D., Bejar, R., Jaiswal, S., Lindsley, R., Sekeres, M., Hasserjian, R., & Ebert, B. (2015). Clonal hematopoiesis of indeterminate potential and its distinction from myelodysplastic syndromes.Blood,126(1), 9-16. doi: 10.1182/blood-2015-03-631747Acknowledgments:National Institute for Health Research, United KingdomDisclosure of Interests:Fareeha Tariq: None declared, Bilal Alobaidi: None declared, Miguel Xavier: None declared, Michael McCorkindale: None declared, Joris Veltman: None declared, John Isaacs Consultant of: AbbVie, Bristol-Myers Squibb, Eli Lilly, Gilead, Janssen, Merck, Pfizer, Roche, Arthur Pratt Grant/research support from: Pfizer, GSK, Amy Anderson: None declared, Matthew Collin: None declared
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Oddon PA, Montava M, Salburgo F, Collin M, Vercasson C, Lavieille JP. Conservative treatment of vestibular schwannoma: growth and Penn Acoustic Neuroma Quality of Life scale in French language. Acta Otorhinolaryngol Ital 2018; 37:320-327. [PMID: 28872162 PMCID: PMC5584105 DOI: 10.14639/0392-100x-1094] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 11/19/2016] [Indexed: 11/23/2022]
Abstract
The aim of this study was to determine the natural history of growth and quality of life (QoL) outcomes for vestibular schwannoma (VS) managed conservatively, and to validate the disease-specific Penn Acoustic Neuroma Quality-of-Life (PANQOL) scale in French language. We retrospectively studied 26 patients with VS managed conservatively. Patient characteristics and radiological findings were collected. Two scales were used to measure QoL: the Short Form-36 Health Survey (SF-36) and the PANQOL scale translated into French. Internal consistency and scores were compared with previous studies. The mean follow-up was 25 months (range 6-72). We observed tumour growth in 14 patients (53.8%), no growth in 12 patients (46.2%) and no case of tumour shrinkage. The mean tumour growth was 2.22 mm/year. No predictive factor of growth was found. Patients with vertigo or dizziness experienced a poorer QoL according to the SF-36 (Social Functioning and Emotional Role Limitation dimensions) and to the PANQOL scale (Balance and Energy dimensions). Our results were comparable with the literature using the SF-36. With the PANQOL scale, our scores were not statistically different with those from Dutch and North American studies except in the field of hearing (p = 0.019). Quality of life becomes essential in the management of VS. According to these results, we support a non-conservative strategy associated with vestibular rehabilitation for patients with dizziness or vertigo. The PANQOL is a validated specific scale for VS, which can be useful in French.
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Affiliation(s)
- P A Oddon
- APHM, Hôpital de la Conception, Service d'Oto-rhino-laryngologie et de Chirurgie cervico-faciale, Marseille, France
| | - M Montava
- APHM, Hôpital de la Conception, Service d'Oto-rhino-laryngologie et de Chirurgie cervico-faciale, Marseille, France.,Aix Marseille Université, IFSSTAR, LBA, UMR-T 24, Marseille, France
| | - F Salburgo
- APHM, Hôpital de la Conception, Service d'Oto-rhino-laryngologie et de Chirurgie cervico-faciale, Marseille, France
| | - M Collin
- APHM, Hôpital de la Conception, Service d'Oto-rhino-laryngologie et de Chirurgie cervico-faciale, Marseille, France
| | - C Vercasson
- Aix Marseille Université, EA3279, Service de Santé Publique, Marseille, France
| | - J P Lavieille
- APHM, Hôpital de la Conception, Service d'Oto-rhino-laryngologie et de Chirurgie cervico-faciale, Marseille, France.,Aix Marseille Université, IFSSTAR, LBA, UMR-T 24, Marseille, France
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Viswanathan S, Merheb R, Wen X, Collin M, Groh-Wargo S. Standardized slow enteral feeding protocol reduces necrotizing enterocolitis in micropremies. J Neonatal Perinatal Med 2018; 10:171-180. [PMID: 28409756 DOI: 10.3233/npm-171680] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Compared to early enteral feeds, delayed introduction and slow enteral feeding advancement to reduce necrotizing enterocolitis (NEC) is not well studied in micropremies (<750g birth weight). METHODS Pre-post case control study. Micropremies who followed a standardized slow enteral feeding (SSEF) protocol (September 2009 to March 2015) were compared with a similar group of historical controls (PreSSEF, January 2003 to July 2009). Enteral feeding withheld for first 10-14 days and advanced at <10 ml/kg/day in the SSEF group. RESULTS Ninety-two infants in the SSEF group were compared with 129 PreSSEF group. Birth weight and gestational age in SSEF and PreSSEF were similar. Breast milk initiation rate was higher in SSEF (87.0 vs. 72.0%, p = 0.01) compared to PreSSEF, but were similar at full enteral feeds. Compared with PreSSEF, feeding initiation day, full enteral feeding day, parenteral nutrition days, and total central line days were longer in SSEF. There was significant reduction in NEC (1.1 vs. 16.2%, p < 0.01), surgical NEC (0.0 vs. 7.8%, p < 0.01) and NEC/death (7.6 vs. 29.5%, p < 0.01), in SSEF compared to PreSSEF. SSEF, compared to PreSSEF, had more cholestasis (41.8 vs 28.8%, p = 0.04), higher peak serum alkaline phosphatase (638 vs. 534 IU/dL, p < 0.01), but similar rates of late-onset sepsis (39.1 vs 43.4%, p = 0.53). In infants who survived to discharge, SSEF had higher discharge weight, lower extra-uterine growth restriction, and similar length of stay, compared to PreSSEF. CONCLUSIONS A SSEF protocol significantly reduces the incidence of NEC and combined NEC/death in micropremies.
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Affiliation(s)
- S Viswanathan
- Division of Neonatology, Department of Pediatrics, Nationwide Children's Hospital, Ohio State University College of Medicine, Columbus, OH, USA
| | - R Merheb
- Division of Neonatology, Department of Pediatrics, MetroHealth Medical Center, Case Western Reserve University, Cleveland, OH, USA
| | - Xintong Wen
- Division of Neonatology, Department of Pediatrics, MetroHealth Medical Center, Case Western Reserve University, Cleveland, OH, USA
| | - M Collin
- Division of Neonatology, Department of Pediatrics, MetroHealth Medical Center, Case Western Reserve University, Cleveland, OH, USA
| | - S Groh-Wargo
- Division of Neonatology, Department of Pediatrics, MetroHealth Medical Center, Case Western Reserve University, Cleveland, OH, USA
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Simão MJ, Collin M, Garcia RO, Mansur E, Pacheco G, Engelmann F. Histological characterization of Passiflora pohlii Mast. root tips cryopreserved using the V-Cryo-plate technique. Protoplasma 2018; 255:741-750. [PMID: 29129002 DOI: 10.1007/s00709-017-1182-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 08/03/2017] [Accepted: 11/05/2017] [Indexed: 06/07/2023]
Abstract
Cryopreservation stands out as the main strategy to ensure safe and cost efficient long-term conservation of plant germplasm, especially for biotechnological materials. However, the injuries associated with the procedure may result in structural damage and low recovery rates after cooling. Histological analysis provides useful information on the effects of osmotic dehydration, LN exposure, and recovery conditions on cellular integrity and tissue organization, allowing the determination of the critical steps of the cryopreservation protocol and, thus, the use of optimized treatments. Passiflora pohlii Mast. (Passifloraceae) is a native species from Brazil with potential agronomic interest. Recent studies showed the presence of saponins in its roots, which presented antioxidant activity. The goal of this work was to develop a cryopreservation technique for root tips of in vitro-derived plants of P. pohlii using the V-Cryo-plate technique and to characterize the anatomical alterations that occurred during the successive steps of the protocol. Root tips were excised from in vitro plants and precultured before adhesion to cryo-plates and then treated for different periods with the plant vitrification solutions PVS2 or PVS3. Treatment with PVS2 for 45 min resulted in higher recovery (79%) when compared with PVS3 (43%). The greatest number of adventitious roots per cryopreserved explant was also observed after a 45-min exposure to PVS2. Plasmolysis levels were higher in cortical cells of cryopreserved explants treated with PVS2, while pericycle and central cylinder cells were not damaged after this treatment. Thirty days after rewarming, no plasmolysis could be detected, regardless of the experimental conditions.
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Affiliation(s)
- Mariela J Simão
- Núcleo de Biotecnologia Vegetal, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier no. 524 PHLC Sala 505, Maracanã, Rio de Janeiro, CEP: 20550-013, Brazil
| | - Myriam Collin
- DIADE, IRD, CIRAD, CNRS, Université de Montpellier, Montpellier, France
| | - Renata O Garcia
- Núcleo de Biotecnologia Vegetal, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier no. 524 PHLC Sala 505, Maracanã, Rio de Janeiro, CEP: 20550-013, Brazil
| | - Elisabeth Mansur
- Núcleo de Biotecnologia Vegetal, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier no. 524 PHLC Sala 505, Maracanã, Rio de Janeiro, CEP: 20550-013, Brazil
| | - Georgia Pacheco
- Núcleo de Biotecnologia Vegetal, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier no. 524 PHLC Sala 505, Maracanã, Rio de Janeiro, CEP: 20550-013, Brazil.
| | - Florent Engelmann
- DIADE, IRD, CIRAD, CNRS, Université de Montpellier, Montpellier, France
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Das A, Mhanna M, Sears J, Houdek JW, Kumar N, Gunzler D, Einstadter D, Collin M. Effect of fluctuation of oxygenation and time spent in the target range on retinopathy of prematurity in extremely low birth weight infants. J Neonatal Perinatal Med 2018; 11:257-263. [PMID: 30103354 DOI: 10.3233/npm-1757] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
BACKGROUND The association between saturation of peripheral oxygenation (SpO2) fluctuation and severity of retinopathy of prematurity (ROP) is well elucidated in extremely low birth weight (ELBW) infants. Time spent in the Target range of SpO2 is also associated with the severity of ROP. METHODS In a prospective observational study, the SpO2 of all ELBW infants admitted to our unit were monitored for the first four weeks of life, and averaged every minute for analysis. The percent time spent at SpO2 <90%, 90-95%, and >95% and weekly SpO2 fluctuations [as SpO2 coefficient of variation (CoV)] were calculated. RESULTS During the study period 21 infants had moderate to severe ROP and 35 infants served as controls. Infants with moderate to severe ROP were smaller and younger than their controls [676±124 grams vs. 796±148 grams (p < 0.001); and 24.0±1.0 weeks vs. 25.0±1.7 weeks (p < 0.001) respectively]. There were no significant differences in time spent in the 90-95% range between groups (p = 0.66). However there was a significant increase in weekly SpO2 CoV in infants with moderate to severe ROP vs. controls (p = 0.007). CONCLUSION In ELBW infants, there was an association between SpO2 fluctuation during the first four weeks of life and severity of ROP, although, no association was established with time spent in the target range of SpO2.
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Affiliation(s)
- A Das
- Department of Neonatology, Cleveland Clinic Children's Hospital, Cleveland, OH, USA
| | - M Mhanna
- Department of Neonatology, MetroHealth Medical Center, Cleveland, OH, USA
| | - J Sears
- Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - J W Houdek
- Information Services, The MetroHealth System, Cleveland, OH, USA
| | - N Kumar
- Department of Neonatology, MetroHealth Medical Center, Cleveland, OH, USA
| | - D Gunzler
- Center for Health Care Research and Policy, Case Western Reserve University at MetroHealth Medical Center, Cleveland, OH, USA
| | - D Einstadter
- Department of Internal Medicine, Case Western Reserve University at MetroHealth Medical Center, Cleveland, OH, USA
| | - M Collin
- Department of Neonatology, MetroHealth Medical Center, Cleveland, OH, USA
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Tranbarger TJ, Fooyontphanich K, Roongsattham P, Pizot M, Collin M, Jantasuriyarat C, Suraninpong P, Tragoonrung S, Dussert S, Verdeil JL, Morcillo F. Transcriptome Analysis of Cell Wall and NAC Domain Transcription Factor Genes during Elaeis guineensis Fruit Ripening: Evidence for Widespread Conservation within Monocot and Eudicot Lineages. Front Plant Sci 2017; 8:603. [PMID: 28487710 PMCID: PMC5404384 DOI: 10.3389/fpls.2017.00603] [Citation(s) in RCA: 11] [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: 12/09/2016] [Accepted: 04/03/2017] [Indexed: 05/13/2023]
Abstract
The oil palm (Elaeis guineensis), a monocotyledonous species in the family Arecaceae, has an extraordinarily oil rich fleshy mesocarp, and presents an original model to examine the ripening processes and regulation in this particular monocot fruit. Histochemical analysis and cell parameter measurements revealed cell wall and middle lamella expansion and degradation during ripening and in response to ethylene. Cell wall related transcript profiles suggest a transition from synthesis to degradation is under transcriptional control during ripening, in particular a switch from cellulose, hemicellulose, and pectin synthesis to hydrolysis and degradation. The data provide evidence for the transcriptional activation of expansin, polygalacturonase, mannosidase, beta-galactosidase, and xyloglucan endotransglucosylase/hydrolase proteins in the ripening oil palm mesocarp, suggesting widespread conservation of these activities during ripening for monocotyledonous and eudicotyledonous fruit types. Profiling of the most abundant oil palm polygalacturonase (EgPG4) and 1-aminocyclopropane-1-carboxylic acid oxidase (ACO) transcripts during development and in response to ethylene demonstrated both are sensitive markers of ethylene production and inducible gene expression during mesocarp ripening, and provide evidence for a conserved regulatory module between ethylene and cell wall pectin degradation. A comprehensive analysis of NAC transcription factors confirmed at least 10 transcripts from diverse NAC domain clades are expressed in the mesocarp during ripening, four of which are induced by ethylene treatment, with the two most inducible (EgNAC6 and EgNAC7) phylogenetically similar to the tomato NAC-NOR master-ripening regulator. Overall, the results provide evidence that despite the phylogenetic distance of the oil palm within the family Arecaceae from the most extensively studied monocot banana fruit, it appears ripening of divergent monocot and eudicot fruit lineages are regulated by evolutionarily conserved molecular physiological processes.
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Affiliation(s)
| | - Kim Fooyontphanich
- Institut de Recherche pour le Développement, IRD, UMR DIADEMontpellier, France
| | | | - Maxime Pizot
- Institut de Recherche pour le Développement, IRD, UMR DIADEMontpellier, France
| | - Myriam Collin
- Institut de Recherche pour le Développement, IRD, UMR DIADEMontpellier, France
| | | | - Potjamarn Suraninpong
- Department of Plant Science, Institute of Agricultural Technology, Walailak UniversityNakhon Si Thammarat, Thailand
| | - Somvong Tragoonrung
- Genome Institute, National Center for Genetic Engineering and BiotechnologyPathumthani, Thailand
| | - Stéphane Dussert
- Institut de Recherche pour le Développement, IRD, UMR DIADEMontpellier, France
| | - Jean-Luc Verdeil
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR AGAPMontpellier, France
| | - Fabienne Morcillo
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR DIADEMontpellier, France
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Petitot AS, Kyndt T, Haidar R, Dereeper A, Collin M, de Almeida Engler J, Gheysen G, Fernandez D. Transcriptomic and histological responses of African rice (Oryza glaberrima) to Meloidogyne graminicola provide new insights into root-knot nematode resistance in monocots. Ann Bot 2017; 119:885-899. [PMID: 28334204 PMCID: PMC5604615 DOI: 10.1093/aob/mcw256] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [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: 05/10/2016] [Accepted: 11/24/2016] [Indexed: 05/06/2023]
Abstract
BACKGROUND AND AIMS The root-knot nematode Meloidogyne graminicola is responsible for production losses in rice ( Oryza sativa ) in Asia and Latin America. The accession TOG5681 of African rice, O. glaberrima , presents improved resistance to several biotic and abiotic factors, including nematodes. The aim of this study was to assess the cytological and molecular mechanisms underlying nematode resistance in this accession. METHODS Penetration and development in M. graminicola in TOG5681 and the susceptible O. sativa genotype 'Nipponbare' were compared by microscopic observation of infected roots and histological analysis of galls. In parallel, host molecular responses to M. graminicola were assessed by root transcriptome profiling at 2, 4 and 8 d post-infection (dpi). Specific treatments with hormone inhibitors were conducted in TOG5681 to assess the impact of the jasmonic acid and salicylic acid pathways on nematode penetration and reproduction. KEY RESULTS Penetration and development of M. graminicola juveniles were reduced in the resistant TOG5681 in comparison with the susceptible accession, with degeneration of giant cells observed in the resistant genotype from 15 dpi onwards. Transcriptome changes were observed as early as 2 dpi, with genes predicted to be involved in defence responses, phenylpropanoid and hormone pathways strongly induced in TOG5681, in contrast to 'Nipponbare'. No specific hormonal pathway could be identified as the major determinant of resistance in the rice-nematode incompatible interaction. Candidate genes proposed as involved in resistance to M. graminicola in TOG5681 were identified based on their expression pattern and quantitative trait locus (QTL) position, including chalcone synthase, isoflavone reductase, phenylalanine ammonia lyase, WRKY62 transcription factor, thionin, stripe rust resistance protein, thaumatins and ATPase3. CONCLUSIONS This study provides a novel set of candidate genes for O. glaberrima resistance to nematodes and highlights the rice- M. graminicola pathosystem as a model to study plant-nematode incompatible interactions.
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Affiliation(s)
- Anne-Sophie Petitot
- Institut de Recherche pour le Développement, UMR 186 IPME (IRD-UM2-Cirad) 911, avenue Agropolis, BP 64501 34394 Montpellier Cedex 5, France
| | - Tina Kyndt
- Department of Molecular Biotechnology, Ghent University, Coupure links 653, 9000 Gent, Belgium
| | - Rana Haidar
- Institut de Recherche pour le Développement, UMR 186 IPME (IRD-UM2-Cirad) 911, avenue Agropolis, BP 64501 34394 Montpellier Cedex 5, France
| | - Alexis Dereeper
- Institut de Recherche pour le Développement, UMR 186 IPME (IRD-UM2-Cirad) 911, avenue Agropolis, BP 64501 34394 Montpellier Cedex 5, France
| | - Myriam Collin
- UMR 232 DIADE (IRD-UM2-Cirad) 911, avenue Agropolis BP 64501, 34394 Montpellier Cedex 5, France
| | - Janice de Almeida Engler
- Institut National de la Recherche Agronomique, UMR IBSV INRA/CNRS/UNS, 400, Route de Chappes BP167, 06903 Sophia Antipolis Cedex, France
| | - Godelieve Gheysen
- Department of Molecular Biotechnology, Ghent University, Coupure links 653, 9000 Gent, Belgium
| | - Diana Fernandez
- Institut de Recherche pour le Développement, UMR 186 IPME (IRD-UM2-Cirad) 911, avenue Agropolis, BP 64501 34394 Montpellier Cedex 5, France
- For correspondence. E-mail
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Sriwichai W, Collin M, Tranbarger TJ, Berger J, Avallone S. Improvement of the content in bioaccessible lipophilic micronutrients in raw and processed drumstick leaves ( Moringa oleifera Lam.). Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2016.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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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Creasey T, Jones GL, Collin M. Granulocyte infusion: benefit beyond neutrophils? Transfus Med 2016; 26:390-392. [PMID: 27273103 DOI: 10.1111/tme.12319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 05/01/2016] [Indexed: 11/28/2022]
Affiliation(s)
- T Creasey
- Newcastle upon Tyne Hospitals NHS Foundation Trust, Northern Centre for Cancer Care, Freeman Hospital, Newcastle upon Tyne, UK
| | - G L Jones
- Newcastle upon Tyne Hospitals NHS Foundation Trust, Northern Centre for Cancer Care, Freeman Hospital, Newcastle upon Tyne, UK
| | - M Collin
- Newcastle upon Tyne Hospitals NHS Foundation Trust, Northern Centre for Cancer Care, Freeman Hospital, Newcastle upon Tyne, UK.
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Ahmed SS, Wang XN, Norden J, Pearce K, El-Gezawy E, Atarod S, Hromadnikova I, Collin M, Holler E, Dickinson AM. Erratum: Identification and validation of biomarkers associated with acute and chronic graft versus host disease. Bone Marrow Transplant 2016; 51:890. [DOI: 10.1038/bmt.2016.125] [Citation(s) in RCA: 5] [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: 11/09/2022]
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Ochando J, Kwan WH, Ginhoux F, Hutchinson JA, Hashimoto D, Collin M. The Mononuclear Phagocyte System in Organ Transplantation. Am J Transplant 2016; 16:1053-69. [PMID: 26602545 DOI: 10.1111/ajt.13627] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 11/04/2015] [Accepted: 11/08/2015] [Indexed: 01/25/2023]
Abstract
The mononuclear phagocyte system (MPS) comprises monocytes, macrophages and dendritic cells (DCs). Over the past few decades, classification of the cells of the MPS has generated considerable controversy. Recent studies into the origin, developmental requirements and function of MPS cells are beginning to solve this problem in an objective manner. Using high-resolution genetic analyses and fate-mapping studies, three main mononuclear phagocyte lineages have been defined, namely, macrophage populations established during embryogenesis, monocyte-derived cells that develop during adult life and DCs. These subsets and their diverse subsets have specialized functions that are largely conserved between species, justifying the introduction of a new, universal scheme of nomenclature and providing the framework for therapeutic manipulation of immune responses in the clinic. In this review, we have commented on the implications of this novel MPS classification in solid organ transplantation.
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Affiliation(s)
- J Ochando
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY
| | - W-H Kwan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - F Ginhoux
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Singapore, Singapore
| | - J A Hutchinson
- Department of Surgery, University Hospital Regensburg, Regensburg, Germany
| | - D Hashimoto
- Department of Hematology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Collin
- Institute of Cellular Medicine, Newcastle University, Newcastle, UK
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Collin M, Honoré P, De Roover A, Meurisse M. Solid Pseudopapillary Tumor of the Pancreas: A Report of Six Cases. Acta Chir Belg 2016. [DOI: 10.1080/00015458.2014.11680991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- M. Collin
- Department of Hepatogastroenterology and Transplantation Surgery, CHU de Liége, University of Liége, Liége, Belgium
| | - P. Honoré
- Department of Hepatogastroenterology and Transplantation Surgery, CHU de Liége, University of Liége, Liége, Belgium
| | - A. De Roover
- Department of Hepatogastroenterology and Transplantation Surgery, CHU de Liége, University of Liége, Liége, Belgium
| | - M. Meurisse
- Department of Hepatogastroenterology and Transplantation Surgery, CHU de Liége, University of Liége, Liége, Belgium
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Ochando J, Kwan WH, Ginhoux F, Hutchinson JA, Hashimoto D, Collin M. The Mononuclear Phagocyte System in Organ Transplantation. Am J Transplant 2016. [DOI: 10.1111/ajt.13627 and 21=21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- J. Ochando
- Department of Oncological Sciences; Icahn School of Medicine at Mount Sinai; New York NY
| | - W.-H. Kwan
- Department of Microbiology; Icahn School of Medicine at Mount Sinai; New York NY
| | - F. Ginhoux
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove; Singapore Singapore
| | - J. A. Hutchinson
- Department of Surgery; University Hospital Regensburg; Regensburg Germany
| | - D. Hashimoto
- Department of Hematology; Hokkaido University Graduate School of Medicine; Sapporo Japan
| | - M. Collin
- Institute of Cellular Medicine; Newcastle University; Newcastle UK
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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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Ahmed SS, Wang XN, Norden J, Pearce K, El-Gezawy E, Atarod S, Hromadnikova I, Collin M, Holler E, Dickinson AM. Identification and validation of biomarkers associated with acute and chronic graft versus host disease. Bone Marrow Transplant 2015; 50:1563-71. [DOI: 10.1038/bmt.2015.191] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 07/14/2015] [Accepted: 07/15/2015] [Indexed: 12/28/2022]
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Balavarca Y, Pearce K, Norden J, Collin M, Jackson G, Holler E, Dressel R, Kolb HJ, Greinix H, Socie G, Toubert A, Rocha V, Gluckman E, Hromadnikova I, Sedlacek P, Wolff D, Holtick U, Dickinson A, Bickeböller H. Predicting survival using clinical risk scores and non-HLA immunogenetics. Bone Marrow Transplant 2015. [PMID: 26214138 DOI: 10.1038/bmt.2015.173] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Previous studies of non-histocompatibility leukocyte antigen (HLA) gene single-nucleotide polymorphisms (SNPs) on subgroups of patients undergoing allogeneic haematopoietic stem cell transplantation (HSCT) revealed an association with transplant outcome. This study further evaluated the association of non-HLA polymorphisms with overall survival in a cohort of 762 HSCT patients using data on 26 polymorphisms in 16 non-HLA genes. When viewed in addition to an already established clinical risk score (EBMT-score), three polymorphisms: rs8177374 in the gene for MyD88-adapter-like (MAL; P=0.026), rs9340799 in the oestrogen receptor gene (ESR; P=0.003) and rs1800795 in interleukin-6 (IL-6; P=0.007) were found to be associated with reduced overall survival, whereas the haplo-genotype (ACC/ACC) in IL-10 was protective (P=0.02). The addition of these non-HLA polymorphisms in a Cox regression model alongside the EBMT-score improved discrimination between risk groups and increased the level of prediction compared with the EBMT-score alone (gain in prediction capability for EBMT-genetic-score 10.8%). Results also demonstrated how changes in clinical practice through time have altered the effects of non-HLA analysis. The study illustrates the significance of non-HLA genotyping prior to HSCT and the importance of further investigation into non-HLA gene polymorphisms in risk prediction.
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Affiliation(s)
- Y Balavarca
- Department of Genetic Epidemiology, University Medical Center, Göttingen, Germany
| | - K Pearce
- Department of Haematological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - J Norden
- Department of Haematological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - M Collin
- Department of Haematological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - G Jackson
- Northern Centre for Cancer Care, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - E Holler
- Department of Hematology and Oncology, University of Regensburg, Regensburg, Germany
| | - R Dressel
- Department of Cellular and Molecular Immunology, University Medical Center, Göttingen, Germany
| | - H-J Kolb
- Department of Haematology and Oncology, Klinikum Grosshadern, Medical Klinik III, Munich, Germany
| | - H Greinix
- Department of Haematology, Division of Haematology, Medical University of Graz, Graz, Austria
| | - G Socie
- Department of Haematology, Immunology and Oncology, AP-HP, Saint Louis Hospital, Hematology Transplantation, Paris, France
| | - A Toubert
- Departement d'Immunologie, Université Paris Diderot, INSERM UMRS-940, AP-HP, Paris, France
| | - V Rocha
- Department of Bone Marrow Transplantation, EUROCORD, St Louis Hospital, Paris, France
| | - E Gluckman
- Department of Bone Marrow Transplantation, EUROCORD, St Louis Hospital, Paris, France
| | - I Hromadnikova
- Department of Molecular Biology and Cell Pathology, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - P Sedlacek
- Department of Pediatric Hematology and Oncology, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - D Wolff
- Department of Hematology and Oncology, University of Regensburg, Regensburg, Germany
| | - U Holtick
- Department I of Internal Medicine, University of Cologne, Cologne, Germany
| | - A Dickinson
- Department of Haematological Sciences, Institute of Cellular Medicine, Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - H Bickeböller
- Department of Genetic Epidemiology, University Medical Center, Göttingen, Germany
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Errouane K, Doulbeau S, Vaissayre V, Leblanc O, Collin M, Kaid-Harche M, Dussert S. The embryo and the endosperm contribute equally to argan seed oil yield but confer distinct lipid features to argan oil. Food Chem 2015; 181:270-6. [PMID: 25794750 DOI: 10.1016/j.foodchem.2015.02.112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 02/20/2015] [Accepted: 02/22/2015] [Indexed: 10/23/2022]
Abstract
In the perspective of studying lipid biosynthesis in the argan seed, the anatomy, ploidy level and lipid composition of mature seed tissues were investigated using an experimental design including two locations in Algeria and four years of study. Using flow cytometry, we determined that mature argan seeds consist of two well-developed tissues, the embryo and the endosperm. The lipid content of the embryo was higher than that of the endosperm, but the dry weight of the endosperm was higher. Consequently, both tissues contribute equally to seed oil yield. Considerable differences in fatty acid composition were observed between the two tissues. In particular, the endosperm 18:2 percentage was twofold higher than that of the embryo. The tocopherol content of the endosperm was also markedly higher than that of the embryo. In contrast, the endosperm and the embryo had similar sterol and triterpene alcohol contents and compositions.
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Affiliation(s)
- Kheira Errouane
- Laboratoire des Productions, Valorisations Végétales et Microbiennes, Département de Biotechnologie, Université des Sciences et de la Technologie d'Oran Mohamed Boudiaf, B.P. 1505, El M'Naouar, Oran 31000, Algeria; IRD, UMR DIADE, 911 Av. Agropolis, BP 64501, 34394 Montpellier, France
| | - Sylvie Doulbeau
- IRD, UMR DIADE, 911 Av. Agropolis, BP 64501, 34394 Montpellier, France
| | | | - Olivier Leblanc
- IRD, UMR DIADE, 911 Av. Agropolis, BP 64501, 34394 Montpellier, France; ERL IRD-CNRS 5300, 911 Av. Agropolis, BP 64501, 34394 Montpellier, France
| | - Myriam Collin
- IRD, UMR DIADE, 911 Av. Agropolis, BP 64501, 34394 Montpellier, France
| | - Meriem Kaid-Harche
- Laboratoire des Productions, Valorisations Végétales et Microbiennes, Département de Biotechnologie, Université des Sciences et de la Technologie d'Oran Mohamed Boudiaf, B.P. 1505, El M'Naouar, Oran 31000, Algeria
| | - Stéphane Dussert
- IRD, UMR DIADE, 911 Av. Agropolis, BP 64501, 34394 Montpellier, France.
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Montava M, Curto CL, Mancini J, Collin M, Lavieille JP. [Comparison of stapes protheses: A prospective analysis of audiometric results obtained after stapedotomy by implantation of a teflon piston and a Soft-CliP® piston]. Rev Laryngol Otol Rhinol (Bord) 2015; 136:97-102. [PMID: 29400027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A wide variety of pistons are available for stapes surgery in otosclerosis. The objective of this work was to analyze the short-term and medium-term results of Soft-CliP® piston in primary stapes surgery and to compare it with a conventional prosthesis. The study was prospective, monocentric, randomized, based on efficiency of Soft-CliP® prosthesis (11 patients) versus Causse® Teflon prosthesis (9 patients) in otosclerosis surgery. Epidemiological data, treatment modalities, pure-tone audiometric results and outcome of patients were studied. Mean follow-up was 10 months. Soft-CliP® placement was statistically longer. The mean postoperative air-bone gap was within 10 dB in 73% and 67% of cases at 2 months and in 82% and 89% of cases at medium-term in Soft-CliP® and Teflon groups respectively. A statistically significant decrease in mean air-bone gap and for all frequencies was observed at 2 months and at medium term, with no difference between the 2 groups. The main result was the demonstration of the reliability and safety of Soft-CliP® prosthesis. With a new design, Soft-CliP® placement was easy. The biomechanics of ossicular chain should be better preserved, and the risk of incus erosion and necrosis decreased. A study on a larger population in the long-term would validate these results.
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Castaño F, Stauffer F, Marquinez X, Crèvecoeur M, Collin M, Pintaud JC, Tregear J. Floral structure and development in the monoecious palm Gaussia attenuata (Arecaceae; Arecoideae). Ann Bot 2014; 114:1483-95. [PMID: 25006179 PMCID: PMC4204787 DOI: 10.1093/aob/mcu133] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 05/13/2014] [Indexed: 05/21/2023]
Abstract
BACKGROUND AND AIMS Sexual dimorphism, at both the flower and plant level, is widespread in the palm family (Arecaceae), in contrast to the situation in angiosperms as a whole. The tribe Chamaedoreeae is of special interest for studies of the evolution of sexual expression since dioecy appears to have evolved independently twice in this group from a monoecious ancestor. In order to understand the underlying evolutionary pathways, it is important to obtain detailed information on flower structure and development in each of the main clades. METHODS Dissection and light and scanning electron microscopy were performed on developing flowers of Gaussia attenuata, a neotropical species belonging to one of the three monoecious genera of the tribe. KEY RESULTS Like species of the other monoecious genera of the Chamaedoreeae (namely Hyophorbe and Synechanthus), G. attenuata produces a bisexual flower cluster known as an acervulus, consisting of a row of male flowers with a basal female flower. Whereas the sterile androecium of female flowers terminated its development at an early stage of floral ontogeny, the pistillode of male flowers was large in size but with no recognizable ovule, developing for a longer period of time. Conspicuous nectary differentiation in the pistillode suggested a possible role in pollinator attraction. CONCLUSIONS Gaussia attenuata displays a number of floral characters that are likely to be ancestral to the tribe, notably the acervulus flower cluster, which is conserved in the other monoecious genera and also (albeit in a unisexual male form) in the dioecious genera (Wendlandiella and a few species of Chamaedorea). Comparison with earlier data from other genera suggests that large nectariferous pistillodes and early arrest in staminode development might also be regarded as ancestral characters in this tribe.
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Affiliation(s)
- Felipe Castaño
- UMR DIADE, Palm Developmental Biology Group, Centre IRD Montpellier, BP 64501, 911, avenue Agropolis, 34394 Montpellier Cedex 5, France
| | - Fred Stauffer
- Conservatoire et Jardin Botaniques de la Ville de Genève, Université de Genève, laboratoire de systématique végétale et biodiversité, CP 60, CH-1292 Chambésy/GE, Switzerland
| | - Xavier Marquinez
- Departamento de Biología, Universidad Nacional de Colombia, sede Bogotá, Carrera 30 45-03, Edificio 421, Colombia
| | - Michèle Crèvecoeur
- Université de Genève, Faculté des Sciences, Département de Botanique et Biologie Végétale, quai Ernest Ansermet 30, 1211 Genève 4, Switzerland
| | - Myriam Collin
- UMR DIADE, Palm Developmental Biology Group, Centre IRD Montpellier, BP 64501, 911, avenue Agropolis, 34394 Montpellier Cedex 5, France
| | - Jean-Christophe Pintaud
- Institut de Recherche pour le Développement (IRD), UMR DIADE/DYNADIV, BP 64501, 34394 Montpellier Cedex 5, France
| | - James Tregear
- UMR DIADE, Palm Developmental Biology Group, Centre IRD Montpellier, BP 64501, 911, avenue Agropolis, 34394 Montpellier Cedex 5, France
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Bernardeschi D, Collin M, Payre M, Kalamarides M, Sterkers O. Functional Results of Internal Auditory Canal Decompression in NF2 Patients. Skull Base Surg 2014. [DOI: 10.1055/s-0034-1383976] [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: 10/20/2022]
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Salma M, Engelmann-Sylvestre I, Collin M, Escoute J, Lartaud M, Yi JY, Kim HH, Verdeil JL, Engelmann F. Effect of the successive steps of a cryopreservation protocol on the structural integrity of Rubia akane Nakai hairy roots. Protoplasma 2014; 251:649-659. [PMID: 24150426 DOI: 10.1007/s00709-013-0565-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Accepted: 10/08/2013] [Indexed: 06/02/2023]
Abstract
In this work, we studied the impact of the successive steps of the droplet-vitrification protocol technique employed for cryopreservation of Rubia akane hairy roots on the features of cortical, pericycle and endoderm cells of apical and central root segments, using histology techniques and combining qualitative and quantitative observations. In apical segments, plasmolysis (22-71 %, depending on cell type) was observed only after the loading treatment and did not increase after the following steps of the protocol. By contrast, in central segments, plasmolysis (39-45 %) was already observed after the sucrose pretreatment; it increased to 54-68 %, depending on cell type, after the loading treatment, but no further changes were noted after treatment with the vitrification solution. After liquid nitrogen exposure and unloading treatment, deplasmolysis was more rapid in apical segments, with cortical and pericycle cells having retrieved their original features. In central segments, only cortical cells had retrieved their original features and endoderm and pericycle cells were still highly plasmolysed. Nuclei were more strongly impacted by the cryopreservation protocol in central segments, where they displayed a highly condensed nucleoplasm from the loading treatment onwards and had not retrieved their original aspect after the unloading treatment. By contrast, nuclei had a much less condensed nucleoplasm in cells of apical segments, and they had retrieved their original aspect after the unloading treatment.
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Affiliation(s)
- Mohammad Salma
- UMR DIADE, IRD, 911 Avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France
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Jaligot E, Hooi WY, Debladis E, Richaud F, Beulé T, Collin M, Agbessi MDT, Sabot F, Garsmeur O, D'Hont A, Alwee SSRS, Rival A. DNA methylation and expression of the EgDEF1 gene and neighboring retrotransposons in mantled somaclonal variants of oil palm. PLoS One 2014; 9:e91896. [PMID: 24638102 PMCID: PMC3956824 DOI: 10.1371/journal.pone.0091896] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 02/17/2014] [Indexed: 11/30/2022] Open
Abstract
The mantled floral phenotype of oil palm (Elaeis guineensis) affects somatic embryogenesis-derived individuals and is morphologically similar to mutants defective in the B-class MADS-box genes. This somaclonal variation has been previously demonstrated to be associated to a significant deficit in genome-wide DNA methylation. In order to elucidate the possible role of DNA methylation in the transcriptional regulation of EgDEF1, the APETALA3 ortholog of oil palm, we studied this epigenetic mark within the gene in parallel with transcript accumulation in both normal and mantled developing inflorescences. We also examined the methylation and expression of two neighboring retrotransposons that might interfere with EgDEF1 regulation. We show that the EgDEF1 gene is essentially unmethylated and that its methylation pattern does not change with the floral phenotype whereas expression is dramatically different, ruling out a direct implication of DNA methylation in the regulation of this gene. Also, we find that both the gypsy element inserted within an intron of the EgDEF1 gene and the copia element located upstream from the promoter are heavily methylated and show little or no expression. Interestingly, we identify a shorter, alternative transcript produced by EgDEF1 and characterize its accumulation with respect to its full-length counterpart. We demonstrate that, depending on the floral phenotype, the respective proportions of these two transcripts change differently during inflorescence development. We discuss the possible phenotypical consequences of this alternative splicing and the new questions it raises in the search for the molecular mechanisms underlying the mantled phenotype in the oil palm.
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Affiliation(s)
| | - Wei Yeng Hooi
- UMR DIADE, CIRAD, Montpellier, France
- FELDA Biotechnology Centre, FASSB, Bandar Enstek, Malaysia
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Collin M, Honoré P, De Roover A, Meurisse M. Solid pseudopapillary tumor of the pancreas: a report of six cases. Acta Chir Belg 2014; 114:110-114. [PMID: 25073208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Solid pseudopapillary tumor of the pancreas (SPTP) is a rare pancreatic neoplasm. The aim of this study was to discuss the clinical presentation, management, and outcome of patients with this kind of tumor. MATERIALS AND METHODS A retrospective review was performed in 6 patients with SPTP surgically treated between January 2004 and September 2011 in our hospital. RESULTS All the 6 patients were female. The mean age of the patients was 39 years (range, 18 to 67 years). The main clinical presentation was abdominal pain or discomfort, however a third of the patients were asymptomatic. The mean size of the tumor was 9.7 cm (range, 2.5 to 18 cm). Three tumors had a well defined capsule, 3 tumors extended in the pancreas. Four of the 6 tumors had a cystic component, and calcifications were observed in one tumor. No lymph node involvement, no lymphatic invasion and no nerve invasion were observed. One tumor showed an infiltration of the splenic vein, and another patient had a liver metastasis with complete resection. Distal pancreatectomy (n = 3), local resection (n = 1), cephalic duodenopancreatectomy (n = 1), and distal pancreatectomy associated with a right hepatectomy (n = 1) were performed. The main postoperative complication in the short-term was bleeding (n = 1), and long-term the development of an insulin-requiring diabetes (n = 2). No patient received adjuvant therapy. Overall mortality rate was 0%. All patients were still alive without recurrent disease with a median follow up of 36.2 months. CONCLUSION Patients with SPTP have an excellent prognosis after its complete removal, even if it is a minimized resection.
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Barraco G, Sylvestre I, Collin M, Escoute J, Lartaud M, Verdeil JL, Engelmann F. Histocytological analysis of yam (Dioscorea alata) shoot tips cryopreserved by encapsulation-dehydration. Protoplasma 2014; 251:177-189. [PMID: 23926078 DOI: 10.1007/s00709-013-0536-5] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 07/24/2013] [Indexed: 06/02/2023]
Abstract
In this work, we performed qualitative and quantitative observations of the cytological changes occurring in cells of yam (Dioscorea alata) in vitro shoot tips cryopreserved using the encapsulation-dehydration (E-D) technique. Shoot tip osmoprotection for 24 h in 1.25 M sucrose medium induced drastic changes in cellular cytological features, including high plasmolysis in all three cellular areas studied, the external cell layer (L1), one to three (L1-3) and seven to nine (L7-9) cell layers from the surface of the meristematic dome, pyknotic nuclei in meristematic area cells and disappearance of nucleoli. Nucleus size decreased significantly in all cellular areas studied. Nucleocytoplasmic ratio decreased significantly in L1-3 and L7-9 cells. Nuclear protein content increased, particularly in L1 and L1-3 cells. After physical dehydration, plasma membrane of numerous basal part cells was broken and intracellular soluble protein leakage was observed. Nucleus area and nucleocytoplasmic ratio decreased significantly in L7-9 cells. One week after cryopreservation, shoot tips showed regrowth and living cells had recovered their original morphology. In all cellular areas studied, nuclei had retrieved their original staining and nucleoli were visible. Original nucleus area values were recovered in L1-3 and L1 cells. The nucleocytoplasmic ratio retrieved its initial value in L1 cells but remained at levels observed after osmoprotection for L1-3 and L7-9 cells. The nuclear protein content had retrieved its original level. This investigation provided new insights in changes occurring in D. alata apices throughout an E-D protocol.
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Affiliation(s)
- Giuseppe Barraco
- IRD, UMR DIADE, 911 avenue Agropolis, BP 64501, 34394, Montpellier Cedex 5, France
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Collin M, Roman S, Fernandez C, Triglia JM, Nicollas R. Ossifying fibroma of the middle turbinate revealed by infection in a young child. Eur Ann Otorhinolaryngol Head Neck Dis 2013; 131:193-5. [PMID: 24139075 DOI: 10.1016/j.anorl.2013.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 04/17/2013] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Ossifying fibroma (OF) is a rare benign fibro-osseous tumor, mainly located in the head and neck region. Most often, it affects the mandible but rare involvement of paranasal sinuses has been reported, associated with more locally aggressive behavior. CASE REPORT We report the case of an 8-year-old boy with OF of the middle turbinate, revealed by ethmoiditis. Total resection was performed on an endoscopic approach. The patient was free of clinical or radiological recurrence at 3 years' follow-up. This was the youngest patient with OF of the middle turbinate so far reported in the international literature. DISCUSSION Presumptive diagnosis is established by clinical examination and CT scan (location, oval-shaped mass, heterogeneous tumor with a thin bony rim). Definitive diagnosis is founded on histological examination (psammomatous bodies, osteoblastic rim, trabecular bone). Treatment in paranasal sinus OF is surgical, preferentially on an endoscopic approach. Resection should be as complete as possible to minimize risk of recurrence, especially in sinonasal locations, known to be more aggressive. Ethmoiditis in an unusual age-range should suggest tumoral etiology.
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Affiliation(s)
- M Collin
- Service d'ORL et chirurgie cervico-faciale pédiatrique, pôle de pédiatrie médico-chirurgicale, hôpital d'enfants de La Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13385 Marseille cedex 5, France
| | - S Roman
- Service d'ORL et chirurgie cervico-faciale pédiatrique, pôle de pédiatrie médico-chirurgicale, hôpital d'enfants de La Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13385 Marseille cedex 5, France
| | - C Fernandez
- Service d'anatomopathologie, hôpitaux de La Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13385 Marseille cedex 5, France
| | - J-M Triglia
- Service d'ORL et chirurgie cervico-faciale pédiatrique, pôle de pédiatrie médico-chirurgicale, hôpital d'enfants de La Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13385 Marseille cedex 5, France
| | - R Nicollas
- Service d'ORL et chirurgie cervico-faciale pédiatrique, pôle de pédiatrie médico-chirurgicale, hôpital d'enfants de La Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13385 Marseille cedex 5, France.
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Hügle T, O’Reilly S, Bigley V, Collin M, Krippner-Heidenreich A, van Laar J. SAT0036 Tumor necrosis factor-alpha co-activated T-cells support a profibrotic cytokine milieu on cost of IL-10 expression in patients with systemic sclerosis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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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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Collin M, Coulange M, Devèze A, Montava M, Estève D, Lavieille JP. [Middle ear barotraumas due to rhinopharyngeal scar tissue: tubomanometry diagnostic and therapeutic contribution]. Rev Laryngol Otol Rhinol (Bord) 2012; 133:157-161. [PMID: 23590106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE Evaluation of tubomanometry contribution to diagnosis middle ear barotraumas in relation with rhinopharyngeal scar tissue, and contribution to check postoperative effectiveness of scar tissue surgical resection. METHODS Clinical cases study of two stewardesses who have lost their flight fitness consecutively to barotraumatic otitis during landing, engendered by rhinopharyngeal scar tissue. RESULTS Pre-operative tubomanometric parameters were abnormal in both cases: decrease of intratympanic pressure in one case, variability of tube opening latency index and lengthening of intratympanic pressure rising time in the other case. Surgical section during endonasal endoscopy results in initially abnormal tubomanometric parameters normalization, allowing resumption of flight fitness without any barotrauma. CONCLUSION Some abnormal tubomanometric parameters help to establish causality link between middle ear barotrauma and rhinopharyngeal scar tissue for which surgical section is thus indicated. Post-operative tubomanometric parameters normalization prove surgical effectiveness. Then, flight fitness could then be restored.
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Affiliation(s)
- M Collin
- CHU Nord, Université de la Méditerranée et Assistance Publique Hôpitaux de Marseille, Service d'Oto-Rhino-Laryngologie et de Chirurgie Cervico-Faciale, Chemin de Bourrely, 13915 Marseille cedex 20, France.
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Jouannic S, Lartaud M, Hervé J, Collin M, Orieux Y, Verdeil JL, Tregear JW. The shoot apical meristem of oil palm (Elaeis guineensis; Arecaceae): developmental progression and dynamics. Ann Bot 2011; 108:1477-1487. [PMID: 21303783 PMCID: PMC3219488 DOI: 10.1093/aob/mcr019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [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: 10/12/2010] [Accepted: 12/23/2010] [Indexed: 05/26/2023]
Abstract
BACKGROUND AND AIMS Oil palm, an unbranched perennial monocotyledon, possesses a single shoot apical meristem (SAM), which is responsible for the initiation of the entire above-ground structure of the plant. To compare the palm SAM structure with those of other monocots and to study variations in its structure throughout the life of the plant, its organization was characterized from the embryonic stage to that of the reproductive plant. METHODS SAM structure was studied by a combination of stained histological sections, light and confocal microscopy, and serial section-based three-dimensional reconstructions. KEY RESULTS The oil palm SAM is characterized by two developmental phases: a juvenile phase with a single tunica-corpus structure displaying a gradual increase in size; and a mature phase characterized by a stable size, a modified shape and an established histological zonation pattern. In mature plants, fluctuations in SAM shape and volume occur, mainly as a consequence of changes in the central zone, possibly in relation to leaf initiation. CONCLUSIONS Development of the oil palm SAM is characterized by a juvenile to mature phase transition accompanied by establishment of a zonal pattern and modified shape. SAM zonation is dynamic during the plastochron period and displays distinct features compared with other monocots.
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Affiliation(s)
- Stefan Jouannic
- IRD, UMR DIAPC, IRD/CIRAD Palm Development Group, 911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5, France.
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Adam H, Collin M, Richaud F, Beulé T, Cros D, Omoré A, Nodichao L, Nouy B, Tregear JW. Environmental regulation of sex determination in oil palm: current knowledge and insights from other species. Ann Bot 2011; 108:1529-37. [PMID: 21712294 PMCID: PMC3219494 DOI: 10.1093/aob/mcr151] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [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: 02/16/2011] [Accepted: 04/07/2011] [Indexed: 05/10/2023]
Abstract
BACKGROUND The African oil palm (Elaeis guineensis) is a monoecious species of the palm subfamily Arecoideae. It may be qualified as 'temporally dioecious' in that it produces functionally unisexual male and female inflorescences in an alternating cycle on the same plant, resulting in an allogamous mode of reproduction. The 'sex ratio' of an oil palm stand is influenced by both genetic and environmental factors. In particular, the enhancement of male inflorescence production in response to water stress has been well documented. SCOPE This paper presents a review of our current understanding of the sex determination process in oil palm and discusses possible insights that can be gained from other species. Although some informative phenological studies have been carried out, nothing is as yet known about the genetic basis of sex determination in oil palm, nor the mechanisms by which this process is regulated. Nevertheless new genomics-based techniques, when combined with field studies and biochemical and molecular cytological-based approaches, should provide a new understanding of the complex processes governing oil palm sex determination in the foreseeable future. Current hypotheses and strategies for future research are discussed.
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Affiliation(s)
| | | | - Frédérique Richaud
- CIRAD, IRD/CIRAD Palm Developmental Biology Group, UMR DIADE, Centre IRD, 911 avenue Agropolis, 34394 Montpellier, France
| | - Thierry Beulé
- CIRAD, IRD/CIRAD Palm Developmental Biology Group, UMR DIADE, Centre IRD, 911 avenue Agropolis, 34394 Montpellier, France
| | | | | | | | - Bruno Nouy
- PalmElit SAS, Parc Agropolis Bt. 14, 2214 Boulevard de la Lironde, 34980 Montferrier sur Lez, France
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Moses SE, Osborne W, Valappil M, Collin M, Lee D, Waugh S, Jackson G, Parry CM, Crowley B. Extensive oral herpes simplex virus type 1 infection in a haematopoietic stem cell transplant recipient not responding to aciclovir. J Clin Virol 2011; 52:67-9. [PMID: 21665532 DOI: 10.1016/j.jcv.2011.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 05/03/2011] [Indexed: 10/18/2022]
Affiliation(s)
- S E Moses
- Department of Virology, Health Protection Agency Microbiology Services, Newcastle, UK.
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Hugle T, Krippner-Heidenreich A, Simpson R, Kraaij M, O'Reilly S, Bigley V, Collin M, Iversen L, van Laar JM. Tumour necrosis factor RECEPTOR activated T cells of patients with systemic sclerosis are deficient in IL-10 expression but promote myofibroblast differentiation via IL-6 and TGF-. Ann Rheum Dis 2011. [DOI: 10.1136/ard.2010.148981.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Adam H, Marguerettaz M, Qadri R, Adroher B, Richaud F, Collin M, Thuillet AC, Vigouroux Y, Laufs P, Tregear JW, Jouannic S. Divergent expression patterns of miR164 and CUP-SHAPED COTYLEDON genes in palms and other monocots: implication for the evolution of meristem function in angiosperms. Mol Biol Evol 2010; 28:1439-54. [PMID: 21135149 DOI: 10.1093/molbev/msq328] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
In order to understand how the morphology of plant species has diversified over time, it is necessary to decipher how the underlying developmental programs have evolved. The regulatory network controlling shoot meristem activity is likely to have played an important role in morphological diversification and useful insights can be gained by comparing monocots and eudicots. These two distinct monophyletic groups of angiosperms diverged 130 Ma and are characterized by important differences in their morphology. Several studies of eudicot species have revealed a conserved role for NAM and CUC3 genes in meristem functioning and pattern formation through the definition of morphogenetic boundaries during development. In this study, we show that NAM- and CUC3-related genes are conserved in palms and grasses, their diversification having predated the radiation of monocots and eudicots. Moreover, the NAM-miR164 posttranscriptional regulatory module is also conserved in palm species. However, in contrast to the CUC3-related genes, which share a similar expression pattern between the two angiosperm groups, the expression domain of the NAM-miR164 module differs between monocot and eudicot species. In our studies of spatial expression patterns, we compared existing eudicot data with novel results from our work using two palm species (date palm and oil palm) and two members of the Poaceae (rice and millet). In addition to contrasting results obtained at the gene expression level, major differences were also observed between eudicot and monocot NAM-related genes in the occurrence of putative cis-regulatory elements in their promoter sequences. Overall, our results suggest that although NAM- and CUC3-related proteins are functionally equivalent between monocots and eudicots, evolutionary radiation has resulted in heterotopy through alterations in the expression domain of the NAM-miR164 regulatory module.
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Affiliation(s)
- Hélène Adam
- IRD, UMR DIAPC, IRD/CIRAD Palm Development Group, Montpellier Cedex, France
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Daher A, Adam H, Chabrillange N, Collin M, Mohamed N, Tregear JW, Aberlenc-Bertossi F. Cell cycle arrest characterizes the transition from a bisexual floral bud to a unisexual flower in Phoenix dactylifera. Ann Bot 2010; 106:255-66. [PMID: 20534596 PMCID: PMC2908162 DOI: 10.1093/aob/mcq103] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
BACKGROUND AND AIMS Phoenix dactylifera (date palm) is a dioecious species displaying strong dimorphism between pistillate and staminate flowers. The mechanisms involved in the development of unisexual flowers are as yet unknown. METHODS This paper describes the results of inflorescence and flower development studies using different histological and molecular cytological approaches. Nuclear integrity and cell division patterns in reproductive organs were investigated through DAPI staining and in situ hybridization using a histone H4 gene probe. KEY RESULTS The earliest sex-related difference in flower buds is observed at an otherwise 'bisexual' stage, at which the number of cells in the gynoecium of pistillate flowers is higher than in their staminate counterparts. In the pistillate flower, staminodes (sterile stamens) display precocious arrest of development followed by cell differentiation. In the staminate flower, pistillodes (sterile gynoecium) undergo some degree of differentiation and their development ceases shortly after the ovule has been initiated. Staminode and pistillode cells exhibit nuclear integrity although they did not show any accumulation of histone H4 gene transcripts. CONCLUSIONS These results strongly suggest that the developmental arrest of sterile sex organs and the subsequent unisexuality of date palm flowers result from a cessation of cell division and precocious cell differentiation rather than from cell death.
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Affiliation(s)
| | - Hélène Adam
- IRD/CIRAD Palm Developmental Biology Group, UMR DIAPC, 911 avenue Agropolis, 34394 Montpellier, France
| | - Nathalie Chabrillange
- IRD/CIRAD Palm Developmental Biology Group, UMR DIAPC, 911 avenue Agropolis, 34394 Montpellier, France
| | - Myriam Collin
- IRD/CIRAD Palm Developmental Biology Group, UMR DIAPC, 911 avenue Agropolis, 34394 Montpellier, France
| | | | - James W. Tregear
- IRD/CIRAD Palm Developmental Biology Group, UMR DIAPC, 911 avenue Agropolis, 34394 Montpellier, France
| | - Frederique Aberlenc-Bertossi
- IRD/CIRAD Palm Developmental Biology Group, UMR DIAPC, 911 avenue Agropolis, 34394 Montpellier, France
- For correspondence. E-mail
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Holmberg A, Lood R, Mörgelin M, Söderquist B, Holst E, Collin M, Christensson B, Rasmussen M. Biofilm formation by Propionibacterium acnes is a characteristic of invasive isolates. Clin Microbiol Infect 2009; 15:787-95. [PMID: 19392888 DOI: 10.1111/j.1469-0691.2009.02747.x] [Citation(s) in RCA: 144] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Propionibacterium acnes is a common and probably underestimated cause of delayed joint prosthesis infection. Bacterial biofilm formation is central in the pathogenesis of infections related to foreign material, and P. acnes has been shown to form biofilm both in vitro and in vivo. Here, biofilm formation by 93 P. acnes isolates, either from invasive infections (n = 45) or from the skin of healthy people (n = 48), was analysed. The majority of isolates from deep infections produced biofilm in a microtitre model of biofilm formation, whereas the skin isolates were poor biofilm producers (p <0.001 for a difference). This indicates a role for biofilm formation in P. acnes virulence. The type distribution, as determined by sequencing of recA, was similar among isolates isolated from skin and from deep infections, demonstrating that P. acnes isolates with different genetic backgrounds have pathogenic potential. The biofilm formed on plastic and on bone cement was analysed by scanning electron microscopy (EM) and by transmission EM. The biofilm was seen as a 10-mum-thick layer covering the bacteria and was composed of filamentous as well as more amorphous structures. Interestingly, the presence of human plasma in solution or at the plastic surface inhibits biofilm formation, which could explain why P. acnes primarily infect plasma-poor environments of, for example, joint prostheses and cerebrospinal shunts. This work underlines the importance of biofilm formation in P. acnes pathogenesis, and shows that biofilm formation should be considered in the diagnosis and treatment of invasive P. acnes infections.
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Affiliation(s)
- A Holmberg
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, 221 84 Lund, Sweden
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Thomassin JM, Danvin BJ, Collin M. Endoscopic anatomy of the posterior tympanum. Rev Laryngol Otol Rhinol (Bord) 2008; 129:239-243. [PMID: 19408502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVES This study aims to describe anatomical variations in the posterior tympanum. Different configurations which influence surgical decisions in middle ear surgery are described. Surgical access to the sinus tympani remains a challenge for otologic surgeons. Usually, the retrotympanum is approached through the middle ear in the anterior-posterior direction during chronic ear surgery. An endoscopic approach is necessary to detail all reliefs of the middle ear and control the total removal in a cholesteatoma surgery. MATERIALS AND METHODS Our study included 120 ears with otosclerosis that were operated on. We have performed an intra-operative endoscopic examination with different endoscopes from the Storz company (3.0 mm diameter 45 and 70 degrees). Its rigid endoscopes have been used to obtain a detailed inspection of the entire middle ear cavity. Three main anatomical configurations increase difficulty for the otologic surgeons. RESULTS One hundred and twenty ears were included in this retrospective study. We described 44 shallow sinus tympani of type I (36.6%), and 46 intermediary sinus tympani of type II which account for 38.4% of the ears. In these two groups, a disease such as cholesteatoma is quite easy to control. In 30 ears we observed a deep sinus tympani of type III (25%). This type of sinus is a real difficulty for the surgeon, which means that a total exploration without an endoscope is not possible and entails intraoperative risks. Some anatomical variations were noted: indeed, six high jugular bulbs were described in the middle ear (5%). In 4 other ears (3.3%), there was a posterior extension which passes under the pyramidal eminence and the fallopian canal. CONCLUSION For 8.3% of the ears, some important intraoperative risks are involved, which can cause damage to the facial nerve or the jugular bulb. Moreover a quarter of the ears have deep sinus tympani which can not be explored with a microscope. This makes the endoscope an essential complement to the microscope in otologic surgery.
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Affiliation(s)
- J M Thomassin
- CHU La Timone, Service ORL, 264 rue Saint Pierre, F-13385 Marseille cedex 5, France
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Morcillo F, Gallard A, Pillot M, Jouannic S, Aberlenc-Bertossi F, Collin M, Verdeil JL, Tregear JW. EgAP2-1, an AINTEGUMENTA-like (AIL) gene expressed in meristematic and proliferating tissues of embryos in oil palm. Planta 2007; 226:1353-62. [PMID: 17628826 DOI: 10.1007/s00425-007-0574-3] [Citation(s) in RCA: 15] [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] [Received: 11/17/2006] [Accepted: 06/01/2007] [Indexed: 05/16/2023]
Abstract
In order to better understand the developmental processes that govern the formation of somatic embryos in oil palm (Elaeis guineensis Jacq.), we investigated the transcription factor genes expressed during embryogenesis in this species. The AP2/EREBP transcription factor family includes the AP2 subgroup, which contains several proteins that play important roles in plant development. We identified and characterized EgAP2-1, which codes for a protein that contains two AP2 domains similar to those of the transcription factor BABYBOOM (BBM) and more generally AINTEGUMENTA-like (AIL) proteins of the AP2 subgroup. In a similar way to related genes from eudicots, ectopic expression of EgAP2-1 in transgenic Arabidopsis plants alters leaf morphology and enhances regeneration capacity. In oil palm, EgAP2-1 transcripts accumulate to the greatest extent in zygotic embryos. This expression pattern was investigated in more detail by in-situ hybridization, revealing that in both zygotic and somatic embryos, EgAP2-1 expression is concentrated in proliferating tissues associated with the early development of leaf primordia, root initials and provascular tissues.
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Affiliation(s)
- F Morcillo
- CIRAD/IRD Palm Group, UMR DAP/LIR IRD 192, Centre IRD Montpellier, BP 64501, 911 avenue Agropolis, 34394, Montpellier Cedex 5, France.
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Péret B, Swarup R, Jansen L, Devos G, Auguy F, Collin M, Santi C, Hocher V, Franche C, Bogusz D, Bennett M, Laplaze L. Auxin influx activity is associated with Frankia infection during actinorhizal nodule formation in Casuarina glauca. Plant Physiol 2007; 144:1852-62. [PMID: 17556507 PMCID: PMC1949887 DOI: 10.1104/pp.107.101337] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Plants from the Casuarinaceae family enter symbiosis with the actinomycete Frankia leading to the formation of nitrogen-fixing root nodules. We observed that application of the auxin influx inhibitor 1-naphtoxyacetic acid perturbs actinorhizal nodule formation. This suggests a potential role for auxin influx carriers in the infection process. We therefore isolated and characterized homologs of the auxin influx carrier (AUX1-LAX) genes in Casuarina glauca. Two members of this family were found to share high levels of deduced protein sequence identity with Arabidopsis (Arabidopsis thaliana) AUX-LAX proteins. Complementation of the Arabidopsis aux1 mutant revealed that one of them is functionally equivalent to AUX1 and was named CgAUX1. The spatial and temporal expression pattern of CgAUX1 promoter:beta-glucuronidase reporter was analyzed in Casuarinaceae. We observed that CgAUX1 was expressed in plant cells infected by Frankia throughout the course of actinorhizal nodule formation. Our data suggest that auxin plays an important role during plant cell infection in actinorhizal symbioses.
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Affiliation(s)
- Benjamin Péret
- Unité Mixte de Recherche Diversité et Adaptation des Plantes Cultivées , Equipe Rhizogenèse, 34394 Montpellier cedex 5, France
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Jouannic S, Collin M, Vidal B, Verdeil JL, Tregear JW. A class I KNOX gene from the palm species Elaeis guineensis (Arecaceae) is associated with meristem function and a distinct mode of leaf dissection. New Phytol 2007; 174:551-568. [PMID: 17447911 DOI: 10.1111/j.1469-8137.2007.02020.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Class I Knotted-like homeobox (KNOX) transcription factors are important regulators of shoot apical meristem function and leaf morphology by their contribution to dissected leaf development. Palms are of particular interest as they produce dissected leaves generated by a distinct mechanism compared with eudicots. The question addressed here was whether class I KNOX genes might be involved in meristem function and leaf dissection in palms. Here, we characterized the EgKNOX1 gene from oil palm (Elaeis guineensis, Arecaceae) and compared it with available sequences from other plant species using phylogenetic analysis. Gene expression pattern was investigated using reverse transcription-polymerase chain reaction (RT-PCR) and in situ hybridization. Functional analysis was carried out by ectopic expression in Arabidopsis and rice. EgKNOX1 was orthologous to STM from Arabidopsis and to OSH1 from rice. It was expressed in the central zone of both vegetative and reproductive meristems. During leaf development, its expression was associated with plications from which the leaflets originate. Different modes of leaf dissection are seen to involve a similar class of genes to control meristematic activities, which govern the production of dissected morphologies.
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Affiliation(s)
- Stefan Jouannic
- IRD/CIRAD Palm Group, UMR 1098, Centre IRD Montpellier, 911 avenue Agropolis, 34394 Montpellier cedex 5, France
| | - Myriam Collin
- IRD/CIRAD Palm Group, UMR 1098, Centre IRD Montpellier, 911 avenue Agropolis, 34394 Montpellier cedex 5, France
| | - Benjamin Vidal
- IRD/CIRAD Palm Group, UMR 1098, Centre IRD Montpellier, 911 avenue Agropolis, 34394 Montpellier cedex 5, France
| | - Jean-Luc Verdeil
- Plateau d'Histocytologie et d'Imagerie Cellulaire Végétale, IFR 127, TA/40/02, CIRAD, Avenue Agropolis, F-34398 Montpellier cedex 5, France
| | - James W Tregear
- IRD/CIRAD Palm Group, UMR 1098, Centre IRD Montpellier, 911 avenue Agropolis, 34394 Montpellier cedex 5, France
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Wang XN, Collin M, Sviland L, Marshall S, Jackson G, Schulz U, Holler E, Karrer S, Greinix H, Elahi F, Hromadnikova I, Dickinson A. Skin explant model of human GVHD: Prediction of clinical outcome and correlation with biological risk factors. Biol Blood Marrow Transplant 2006. [DOI: 10.1016/j.bbmt.2005.11.188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Berthold M, Collin M, Sejlitz T, Meister B, Lind P. Cloning of a novel orphan G protein-coupled receptor (GPCR-2037): in situ hybridization reveals high mRNA expression in rat brain restricted to neurons of the habenular complex. ACTA ACUST UNITED AC 2004; 120:22-9. [PMID: 14667573 DOI: 10.1016/j.molbrainres.2003.09.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The family of G protein-coupled receptors (GPCRs) is one of the largest protein families in the mammalian genome. Receptors belonging to this class mediate the effects of very diverse ligands and are responsible for signaling events by affecting the activities of enzymes and ion channels. Here we describe the cloning and identification of GPCR-2037, a novel and previously not identified member of the large family of GPCRs. This orphan GPCR displays several typical features of family A type of GPCRs and shows highest homology with the galanin receptors 2 and 3. In rat brain, in situ hybridization showed that expression of GPCR-2037 mRNA was exclusively localized to neurons of the habenular complex. The expression was particularly prominent in the medial habenular nucleus, whereas the lateral habenular nucleus exhibited a lower number of labeled cells. The restricted and unique expression pattern of GPCR-2037 in the rat brain suggests a role for this orphan GPCR in the habenular complex, a brain structure implicated in the modulation of various physiological functions. Further studies involving the identification of the GPCR ligand will enable the functional characterization of this orphan receptor and its role in regulating the habenular complex.
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Affiliation(s)
- M Berthold
- Department of Assay Development and Screening, Biovitrum AB, SE-112 76, Stockholm, Sweden
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Collin M, Backberg M, Ovesjo ML, Fisone G, Edwards RH, Fujiyama F, Meister B. Plasma membrane and vesicular glutamate transporter mRNAs/proteins in hypothalamic neurons that regulate body weight. Eur J Neurosci 2003. [DOI: 10.1046/j.1460-9568.2003.t01-1-03010.x] [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: 11/20/2022]
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