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Karamanou K, Perrot G, Maquart FX, Brézillon S. Lumican as a multivalent effector in wound healing. Adv Drug Deliv Rev 2018; 129:344-351. [PMID: 29501701 DOI: 10.1016/j.addr.2018.02.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 01/31/2018] [Accepted: 02/26/2018] [Indexed: 12/14/2022]
Abstract
Wound healing, a complex physiological process, is responsible for tissue repair after exposure to destructive stimuli, without resulting in complete functional regeneration. Injuries can be stromal or epithelial, and most cases of wound repair have been studied in the skin and cornea. Lumican, a small leucine-rich proteoglycan, is expressed in the extracellular matrices of several tissues, such as the cornea, cartilage, and skin. This molecule has been shown to regulate collagen fibrillogenesis, keratinocyte phenotypes, and corneal transparency modulation. Lumican is also involved in the extravasation of inflammatory cells and angiogenesis, which are both critical in stromal wound healing. Lumican is the only member of the small leucine-rich proteoglycan family expressed by the epithelia during wound healing. This review summarizes the importance of lumican in wound healing and potential methods of lumican drug delivery to target wound repair are discussed. The involvement of lumican in corneal wound healing is described based on in vitro and in vivo models, with critical emphasis on its underlying mechanisms of action. Similarly, the expression and role of lumican in the healing of other tissues are presented, with emphasis on skin wound healing. Overall, lumican promotes normal wound repair and broadens new therapeutic perspectives for impaired wound healing.
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Affiliation(s)
- Konstantina Karamanou
- Université de Reims Champagne-Ardenne, Laboratoire de Biochimie Médicale et Biologie Moléculaire, Reims, France; Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece; CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, Reims, France
| | - Gwenn Perrot
- Université de Reims Champagne-Ardenne, Laboratoire de Biochimie Médicale et Biologie Moléculaire, Reims, France; CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, Reims, France
| | - Francois-Xavier Maquart
- Université de Reims Champagne-Ardenne, Laboratoire de Biochimie Médicale et Biologie Moléculaire, Reims, France; CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, Reims, France; CHU Reims, Laboratoire Central de Biochimie, Reims, France
| | - Stéphane Brézillon
- Université de Reims Champagne-Ardenne, Laboratoire de Biochimie Médicale et Biologie Moléculaire, Reims, France; CNRS UMR 7369, Matrice Extracellulaire et Dynamique Cellulaire, Reims, France.
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Bagheri Varzaneh M, Rahmani H, Jahanian R, Mahdavi AH, Perreau C, Perrot G, Brézillon S, Maquart FX. The influence of oral copper-methionine on matrix metalloproteinase-2 gene expression and activation in right-sided heart failure induced by cold temperature: A broiler chicken perspective. J Trace Elem Med Biol 2017; 39:71-75. [PMID: 27908427 DOI: 10.1016/j.jtemb.2016.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 06/09/2016] [Accepted: 07/06/2016] [Indexed: 11/16/2022]
Abstract
This study was designed to investigate the expression, activation and activity of matrix metalloproteinase-2 (MMP-2) in the heart of broiler chickens reared in cold conditions and fed with copper-methionine supplement at different levels. The chickens (n=480) were randomly allotted to six treatments and four replicates. Treatments included two rearing temperatures (i.e. normal and cold temperatures) each combined with three levels of supplemental copper-methionine (i.e. 0, 100 and 200mg/kg). On d 38 and 45 of age, four broilers from each treatment were sacrificed and their hearts were stored at -80°C. Right-sided heart failure, as evident from abdominal and pericardial fluid accumulation, was observed in broilers under cold stress and not receiving supplemental copper. This clinical observation was confirmed at molecular level through increased MMP-2 expression, activation and activity in this group. Birds reared under normal temperature, however, were not involved in right-sided heart failure nor benefitted from copper-methionine supplementation. In contrast, gelatin zymography and real-time PCR demonstrated that dietary supplementation with copper-methionine decreased pro-MMP-2 and MMP-2 in the heart of chickens reared in cold conditions. However, gelatin reverse zymography did not show any difference between treatments in tissue inhibitor of metalloproteinase-2. Level of supplementation showed similar effects on parameters determined. It is concluded that dietary supplementation with copper-methionine reduced right-sided heart failure at clinical and molecular levels in cold-stressed chickens.
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Affiliation(s)
- Mina Bagheri Varzaneh
- Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran; Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA N° 7369, Faculté de Médecine de Reims, 51095 Reims cedex, France.
| | - Hamidreza Rahmani
- Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Rahman Jahanian
- Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Amir Hossein Mahdavi
- Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Corinne Perreau
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA N° 7369, Faculté de Médecine de Reims, 51095 Reims cedex, France
| | - Gwenn Perrot
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA N° 7369, Faculté de Médecine de Reims, 51095 Reims cedex, France
| | - Stéphane Brézillon
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA N° 7369, Faculté de Médecine de Reims, 51095 Reims cedex, France
| | - François-Xavier Maquart
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA N° 7369, Faculté de Médecine de Reims, 51095 Reims cedex, France; CHU de Reims, Laboratoire Central de Biochimie, 51092 Reims cedex, France
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Bagheri Varzaneh M, Rahmani H, Jahanian R, Mahdavi AH, Perreau C, Perrot G, Brézillon S, Maquart FX. Effects of Dietary Copper-Methionine on Matrix Metalloproteinase-2 in the Lungs of Cold-Stressed Broilers as an Animal Model for Pulmonary Hypertension. Biol Trace Elem Res 2016; 172:504-510. [PMID: 26749413 DOI: 10.1007/s12011-015-0612-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 12/28/2015] [Indexed: 02/04/2023]
Abstract
The objective of the present study was to investigate the effects of different levels of copper (as supplemental copper-methionine) on ascites incidence and matrix metalloproteinase-2 (MMP-2) changes in the lungs of cold-stressed broilers. For this purpose, 480 1-day-old Ross 308 broiler chickens were randomly assigned to six treatments. Treatments consisted of two ambient temperatures (thermoneutral and cold stress) each combined with 0, 100, and 200 mg supplemental copper/kg as copper-methionine in a 2 × 3 factorial arrangement in a completely randomized design with four replicates. Ascites was diagnosed based on abdominal and pericardial fluid accumulation at 45 days of age. Fourty-eight broilers were killed at 38 and 45 days of age, and their lungs were collected for biological analysis. Results showed that MMP-2 increased in the lungs of ascitic broilers and that copper-methionine supplementation significantly reduced MMP-2 in cold-stressed broiler chickens. Treatments did not affect tissue inhibitor of metalloproteinase-2 (TIMP-2) at 38 and 45 days of age, and no difference was observed between 100 and 200 mg/kg copper-methionine treatments. In conclusion, copper-methionine at higher than conventional levels of supplementation decreased ascites incidence in low temperature through reduced MMP-2 concentration. Further research is warranted to investigate the effect of copper on MMP-2 concentrations in other tissues with high oxygen demand.
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Affiliation(s)
- Mina Bagheri Varzaneh
- Department of Animal Sciences, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA NO 7369, Faculté de Médecine de Reims, 51095, Reims Cedex, France.
| | - Hamidreza Rahmani
- Department of Animal Sciences, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Rahman Jahanian
- Department of Animal Sciences, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Amir Hossein Mahdavi
- Department of Animal Sciences, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Corinne Perreau
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA NO 7369, Faculté de Médecine de Reims, 51095, Reims Cedex, France
| | - Gwenn Perrot
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA NO 7369, Faculté de Médecine de Reims, 51095, Reims Cedex, France
| | - Stéphane Brézillon
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA NO 7369, Faculté de Médecine de Reims, 51095, Reims Cedex, France
| | - François-Xavier Maquart
- Unité de Recherche "Matrice Extracellulaire et Dynamique Cellulaire" (MEDyC), UMR CNRS/URCA NO 7369, Faculté de Médecine de Reims, 51095, Reims Cedex, France
- CHU de Reims, Laboratoire Central de Biochimie, 51092, Reims Cedex, France
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Lecoules S, Carmoi T, Klotz C, Rapp C, Perrot G, Galeano C, Algayres JP. Fièvre révélatrice d’un cancer colique : 11 observations. Rev Med Interne 2013; 34:136-40. [DOI: 10.1016/j.revmed.2012.08.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2008] [Revised: 07/08/2012] [Accepted: 08/08/2012] [Indexed: 12/26/2022]
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Klotz C, Zyani M, Galéano C, Baton O, Perrot G, Algayres JP. Cancer papillaire de la thyroïde au cours de la polypose adénomateuse familiale : intérêt du dépistage systématique ? Rev Med Interne 2012. [DOI: 10.1016/j.revmed.2012.10.310] [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: 10/27/2022]
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Lebon L, Perrot G, Galéano C, Carmoi T, Lecoules S, Algayres JP. SIADH et inhibiteurs de la pompe à protons chez le sujet âgé : trois observations. Rev Med Interne 2012. [DOI: 10.1016/j.revmed.2012.10.249] [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: 11/16/2022]
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Croce S, MacGrogan G, Lagarde P, Ribeiro A, Stoeckle E, Guyon F, Floquet A, Noël JC, Perrot G, Coindre JM, Chibon F. Les tumeurs musculaires lisses utérines à potentiel de malignité incertain (STUMP) : léiomyomes à profil remanié ou léiomyosarcomes de bas grade ? Étude moléculaire de faisabilité (par CGH-array) sur une série de 31 cas. Ann Pathol 2012. [DOI: 10.1016/j.annpat.2012.09.112] [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: 10/27/2022]
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Bonnefoy S, Chauvin A, Galéano-Cassaz C, Camilleri-Broet S, Jacquet SF, Carmoi T, Perrot G, Blondon H, Lecoules S, Cambon A, Algayres JP. [Tropical sprue in an expatriate]. Rev Med Interne 2012; 33:284-7. [PMID: 22405324 DOI: 10.1016/j.revmed.2012.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 01/19/2012] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Tropical sprue is a postinfective malabsorption syndrome that occurs in some tropical endemic areas. CASE REPORT A 65-year-old Caucasian patient, with no significant past medical history, living in Cambodia for 10 years, presented with a 23 kg weight loss and chronic diarrhea. Clinical examination was unremarkable. Laboratory tests showed a moderate nutritional deficiency syndrome. The upper gastrointestinal endoscopy showed duodenal villous atrophy and histological analysis confirmed subtotal villous atrophy with important intraepithelial lymphocytosis. The diagnosis of tropical sprue was considered on the epidemiological, clinical and biological context, and the absence of other cause of villous atrophy. A three-month duration treatment with antibiotics, folic acid and vitamin B12 was initiated. The clinical course was favorable with disappearance of diarrhea in 15 days. One year later, the patient had resumed his usual weight, and laboratory tests and duodenal biopsies were normal. CONCLUSION The diagnosis of tropical sprue should be systematically discussed in any malabsorption syndrome with villous atrophy in a patient living or having lived in the tropics.
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Affiliation(s)
- S Bonnefoy
- Clinique médicale, HIA du Val-de-Grâce, 74, boulevard de Port-Royal, 75005 Paris, France.
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Bonnefoy S, Hitier JB, Bila A, Charbonnel A, Tsiti P, Galéano C, Perrot G, Blondon H, Carmoi T, Lecoules S, Tuleja E, Algayres JP. Actinomycose abdominopelvienne postopératoire chez une patiente de 19ans. Rev Med Interne 2011. [DOI: 10.1016/j.revmed.2011.10.070] [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: 10/15/2022]
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Carmoi T, Grateau G, Billhot M, Dumas G, Biale L, Perrot G, Algayres JP. [Prolonged fever: specific issues in the young adult population]. Rev Med Interne 2011; 31:838-45. [PMID: 20537444 DOI: 10.1016/j.revmed.2009.10.437] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2009] [Revised: 09/30/2009] [Accepted: 10/31/2009] [Indexed: 11/29/2022]
Abstract
Early studies on prolonged fever date back to the 1960s. Fifty years later, prolonged unexplained fever remains a diagnostic challenge to the general internists. Although the aetiologies of prolonged fevers have not changed much in the general population, the distribution between the various causes is not the same anymore. A regular decrease in infectious and neoplastic causes is noticed whatever the age. Prolonged fevers related to inflammatory disorders and fevers that remain of unknown origin still represent approximately 30 to 50% of the cases. In the young adult population, as in the older patients, prolonged fevers can be attributed to four groups: infection, inflammation, neoplasic and other aetiologies (including drug-related fevers). In the young adult population, the management of prolonged fever presents some specific issues that are the purpose of this review coupled with our own experience. The prognosis of undiagnosed prolonged fever is usually favourable, as a life-threatening aetiology is exceptionally diagnosed during the follow-up if the initial management was complete and accurate.
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Affiliation(s)
- T Carmoi
- Clinique médicale, hôpital d'instruction des armées du Val-de-Grâce, 74, boulevard de Port-Royal, 75005 Paris, France.
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Selvais C, D'Auria L, Tyteca D, Perrot G, Lemoine P, Troeberg L, Dedieu S, Noël A, Nagase H, Henriet P, Courtoy PJ, Marbaix E, Emonard H. Cell cholesterol modulates metalloproteinase-dependent shedding of low-density lipoprotein receptor-related protein-1 (LRP-1) and clearance function. FASEB J 2011; 25:2770-81. [PMID: 21518850 DOI: 10.1096/fj.10-169508] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Low-density lipoprotein receptor-related protein-1 (LRP-1) is a plasma membrane scavenger and signaling receptor, composed of a large ligand-binding subunit (515-kDa α-chain) linked to a shorter transmembrane subunit (85-kDa β-chain). LRP-1 cell-surface level and function are controlled by proteolytic shedding of its ectodomain. Here, we identified ectodomain sheddases in human HT1080 cells and demonstrated regulation of the cleavage by cholesterol by comparing the classical fibroblastoid type with a spontaneous epithelioid variant, enriched ∼ 2-fold in cholesterol. Two membrane-associated metalloproteinases were involved in LRP-1 shedding: a disintegrin and metalloproteinase-12 (ADAM-12) and membrane-type 1 matrix metalloproteinase (MT1-MMP). Although both variants expressed similar levels of LRP-1, ADAM-12, MT1-MMP, and specific tissue inhibitor of metalloproteinases-2 (TIMP-2), LRP-1 shedding from epithelioid cells was ∼4-fold lower than from fibroblastoid cells. Release of the ectodomain was triggered by cholesterol depletion in epithelioid cells and impaired by cholesterol overload in fibroblastoid cells. Modulation of LRP-1 shedding on clearance was reflected by accumulation of gelatinases (MMP-2 and MMP-9) in the medium. We conclude that cholesterol exerts an important control on LRP-1 levels and function at the plasma membrane by modulating shedding of its ectodomain, and therefore represents a novel regulator of extracellular proteolytic activities.
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Affiliation(s)
- Charlotte Selvais
- Cell Biology Laboratory, de Duve Institute, UCL-75.41, 75 avenue Hippocrate, B-1200 Bruxelles, Belgium
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Chauvin A, Galéano-Cassaz C, Camilleri-Broet S, Carmoi T, Perrot G, Blondon H, Lecoules S, Cambon A, Algayres JP. Sprue tropicale chez un expatrié : un diagnostic à ne pas méconnaitre. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.277] [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: 10/18/2022]
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Cambon A, Lecoules S, Chauvin A, Carmoi T, Perrot G, Galéano-Cassaz C, Blondon H, Algayres JP. Cholangite sclérosante au cours de l’histiocytose langerhansienne de l’adulte. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.211] [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: 10/18/2022]
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Cambon A, Carmoi T, Algayres JP, Lecoules S, Chauvin A, Galeano-Cassaz C, Perrot G, Blondon H. Anémie ferriprive à bilan endoscopique digestif normal : plaidoyer pour l’entéroscanner. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Langlois B, Perrot G, Schneider C, Henriet P, Emonard H, Martiny L, Dedieu S. LRP-1 promotes cancer cell invasion by supporting ERK and inhibiting JNK signaling pathways. PLoS One 2010; 5:e11584. [PMID: 20644732 PMCID: PMC2904376 DOI: 10.1371/journal.pone.0011584] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [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: 04/02/2010] [Accepted: 06/20/2010] [Indexed: 01/16/2023] Open
Abstract
Background The low-density lipoprotein receptor-related protein-1 (LRP-1) is an endocytic receptor mediating the clearance of various extracellular molecules involved in the dissemination of cancer cells. LRP-1 thus appeared as an attractive receptor for targeting the invasive behavior of malignant cells. However, recent results suggest that LRP-1 may facilitate the development and growth of cancer metastases in vivo, but the precise contribution of the receptor during cancer progression remains to be elucidated. The lack of mechanistic insights into the intracellular signaling networks downstream of LRP-1 has prevented the understanding of its contribution towards cancer. Methodology/Principal Findings Through a short-hairpin RNA-mediated silencing approach, we identified LRP-1 as a main regulator of ERK and JNK signaling in a tumor cell context. Co-immunoprecipitation experiments revealed that LRP-1 constitutes an intracellular docking site for MAPK containing complexes. By using pharmacological agents, constitutively active and dominant-negative kinases, we demonstrated that LRP-1 maintains malignant cells in an adhesive state that is favorable for invasion by activating ERK and inhibiting JNK. We further demonstrated that the LRP-1-dependent regulation of MAPK signaling organizes the cytoskeletal architecture and mediates adhesive complex turnover in cancer cells. Moreover, we found that LRP-1 is tethered to the actin network and to focal adhesion sites and controls ERK and JNK targeting to talin-rich structures. Conclusions We identified ERK and JNK as the main molecular relays by which LRP-1 regulates focal adhesion disassembly of malignant cells to support invasion.
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Affiliation(s)
- Benoit Langlois
- Université de Reims Champagne-Ardenne, CNRS UMR 6237 MEDyC, Laboratoire SiRMa, Campus Moulin de la Housse, Reims, France
| | - Gwenn Perrot
- Université de Reims Champagne-Ardenne, CNRS UMR 6237 MEDyC, Laboratoire SiRMa, Campus Moulin de la Housse, Reims, France
| | - Christophe Schneider
- Université de Reims Champagne-Ardenne, CNRS UMR 6237 MEDyC, Laboratoire SiRMa, Campus Moulin de la Housse, Reims, France
| | - Patrick Henriet
- Cell Biology Unit, de Duve Institute and Université Catholique de Louvain, Brussels, Belgium
| | - Hervé Emonard
- Université de Reims Champagne-Ardenne, CNRS UMR 6237 MEDyC, Laboratoire SiRMa, Campus Moulin de la Housse, Reims, France
| | - Laurent Martiny
- Université de Reims Champagne-Ardenne, CNRS UMR 6237 MEDyC, Laboratoire SiRMa, Campus Moulin de la Housse, Reims, France
| | - Stéphane Dedieu
- Université de Reims Champagne-Ardenne, CNRS UMR 6237 MEDyC, Laboratoire SiRMa, Campus Moulin de la Housse, Reims, France
- * E-mail:
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Letousey P, Baillieul F, Perrot G, Rabenoelina F, Boulay M, Vaillant-Gaveau N, Clément C, Fontaine F. Early events prior to visual symptoms in the apoplectic form of grapevine esca disease. Phytopathology 2010; 100:424-31. [PMID: 20373962 DOI: 10.1094/phyto-100-5-0424] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Plant infection by pathogens generates various forms of symptoms. Most of them have been described as soon as they become visible, whereas preceding, discrete signs during incubation are poorly or not understood. In Vitis vinifera, esca-related pathogenic fungi inhabit living trunk wood and induce the so-called apoplexy, a sudden wilting of leaves within a few days. To further understand the apoplexy expression, the period preceding symptom appearance was investigated by following physiological and molecular markers associated with photosynthetic mechanisms and stress responses. Within the week preceding symptoms, drastic physiological alterations of photosynthesis were registered in pre-apoplectic vines, as revealed by a decrease in gas exchange, changes in chlorophyll fluorescence, and repression of photosynthesis-related genes. In the meantime, expression of defense-related genes was induced and amplified during symptom expression. Water-stress-related genes were specifically investigated because water transport may be impeded by clogging xylem vessels due to esca-causing fungi. Neither of the tested water-stress-related genes was affected in pre-apoplectic grapevine leaves whereas these genes were downregulated in drying leaves. Our results suggest that, during incubation of esca apoplexy, grapevine perceives some signals (likely fungi-originated toxins) and reacts by reducing photosynthesis and triggering defense mechanisms.
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Affiliation(s)
- P Letousey
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Université de Reims Champagne-Ardenne, Reims, France
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Lecoules S, Carmoi T, Billhot M, Perrot G, Blondon H, Algayres JP. L’atteinte hépatique dans la maladie de Wegener. Rev Med Interne 2009. [DOI: 10.1016/j.revmed.2009.03.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Perrot G, Pavic M, Milou F, Crozes C, Faucompret S, Vincent E. [Difficult diagnosis of a pancreatic paraganglioma]. Rev Med Interne 2007; 28:701-4. [PMID: 17618712 DOI: 10.1016/j.revmed.2007.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Revised: 06/05/2007] [Accepted: 06/05/2007] [Indexed: 02/02/2023]
Abstract
INTRODUCTION The paraganglioma is a rare tumour that can sometimes develop near to the pancreatic gland and can occasionally mimic an intra pancreatic mass. Invasive investigations with puncture or primary surgical resection must be avoided because of the risk of vital complications. EXEGESIS We report on the case of a 41 years old woman presenting with a mass apparently affecting the pancreatic gland. She also presented with malaises. Paraganglioma was suspected because of the malaises and the blood pressure crises. The diagnosis was permitted by the findings of high urinary metanephrine levels. So the tumour was resected without previous fine needle aspiration and with specific anaesthetic measures. No complication was observed. CONCLUSION When a patient presents with a pancreatic mass, physician must carefully take into account the possibility of a paraganglioma particularly when malaises are present.
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Affiliation(s)
- G Perrot
- Service des maladies de l'appareil digestif, HIA Desgenettes, 108 boulevard Pinel, 69275 Lyon cedex 03, France.
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Perrot G, Miailhes P, Bailly F, Chevallier M, Cotte L, Pradat P, Boibieux A, Trepo C. Étude prospective comparant l'élastométrie impulsionnelle à la ponction biopsie hépatique pour l'évaluation de la fibrose hépatique chez les co-infectés VIH–VHB. Rev Med Interne 2007. [DOI: 10.1016/j.revmed.2007.03.197] [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: 11/24/2022]
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Overberg JA, Oesch P, Perrot G. Wie standardisiert sind Nachbehandlungsschemata für Knieendoprothesen in der Schweiz? physioscience 2007. [DOI: 10.1055/s-2007-962871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Geslin C, Le Romancer M, Erauso G, Gaillard M, Perrot G, Prieur D. PAV1, the first virus-like particle isolated from a hyperthermophilic euryarchaeote, "Pyrococcus abyssi". J Bacteriol 2003; 185:3888-94. [PMID: 12813083 PMCID: PMC161591 DOI: 10.1128/jb.185.13.3888-3894.2003] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We describe the first virus-like particle of a hyperthermophilic euryarchaeote which was discovered in a strain of "Pyrococcus abyssi" previously characterized in our laboratory. This particle, named PAV1, is lemon-shaped (120 nm x 80 nm), with a short tail terminated by fibers, and resembles the virus SSV1, the type member of the Fuselloviridae, isolated from Sulfolobus shibatae. Sensitivity of the virus-like particle to organic solvents and detergents suggested that the envelope of PAV1 may contain lipids in addition to proteins. It contains a double-stranded circular DNA of 18 kb which is also present in high copy number in a free form in the host cytoplasm. No integrated form of the PAV1 genome could be detected in the host chromosome. Under standard growth conditions, the host cells continuously release PAV1 particles into the culture supernatant without spontaneous lysis, with a maximum reached in the late stationary phase. UV, gamma irradiation, treatment with mitomycin C, and various physiological stresses had no effect on PAV1 production. Screening of a large number of Thermococcales isolates did not permit to find a sensitive host. These results suggest that PAV1 persists in the host strain in a stable carrier state rather than a prophage.
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Affiliation(s)
- C Geslin
- Université de Bretagne Occidentale, CNRS UMR 6539, Institut Universitaire Européen de la Mer, Technopôle Brest-Iroise, 29280 Plouzané, France.
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Williams RL, Vila J, Perrot G, Scheraga HA. Empirical solvation models in the context of conformational energy searches: application to bovine pancreatic trypsin inhibitor. Proteins 1992; 14:110-9. [PMID: 1384032 DOI: 10.1002/prot.340140112] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Continuum solvation models that estimate free energies of solvation as a function of solvent accessible surface area are computationally simple enough to be useful for predicting protein conformation. The behavior of three such solvation models has been examined by applying them to the minimization of the conformational energy of bovine pancreatic trypsin inhibitor. The models differ only with regard to how the constants of proportionality between free energy and surface area were derived. Each model was derived by fitting to experimentally measured equilibrium solution properties. For two models, the solution property was free energy of hydration. For the third, the property was NMR coupling constants. The purpose of this study is to determine the effect of applying these solvation models to the nonequilibrium conformations of a protein arising in the course of global searches for conformational energy minima. Two approaches were used: (1) local energy minimization of an ensemble of conformations similar to the equilibrium conformation and (2) global search trajectories using Monte Carlo plus minimization starting from a single conformation similar to the equilibrium conformation. For the two models derived from free energy measurements, it was found that both the global searches and local minimizations yielded conformations more similar to the X-ray crystallographic structures than did searches or local minimizations carried out in the absence of a solvation component of the conformational energy. The model derived from NMR coupling constants behaved similarly to the other models in the context of a global search trajectory. For one of the models derived from measured free energies of hydration, it was found that minimization of an ensemble of near-equilibrium conformations yielded a new ensemble in which the conformation most similar to the X-ray determined structure PTI4 had the lowest total free energy. Despite the simplicity of the continuum solvation models, the final conformation generated in the trajectories for each of the models exhibited some of the characteristics that have been reported for conformations obtained from molecular dynamics simulations in the presence of a bath of explicit water molecules. They have smaller root mean square (rms) deviations from the experimentally determined conformation, fewer incorrect hydrogen bonds, and slightly larger radii of gyration than do conformations derived from search trajectories carried out in the absence of solvent.
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Affiliation(s)
- R L Williams
- Baker Laboratory of Chemistry, Cornell University, Ithaca, New York 14853-1301
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Perrot G, Cheng B, Gibson K, Vila J, Palmer K, Nayeem A, Maigret B, Scheraga H. MSEED: A program for the rapid analytical determination of accessible surface areas and their derivatives. J Comput Chem 1992. [DOI: 10.1002/jcc.540130102] [Citation(s) in RCA: 125] [Impact Index Per Article: 3.9] [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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Abstract
Several new methods or improvements of older algorithms determining the different pieces of molecular surface are presented. Their improvement in time and their complexity are discussed. Only the indexes of the atoms on which the pieces are relying are, in fact, determined, since their explicit representation from these numbers varies according to the 3D capabilities of the graphic workstation (dots, grid, etc.), and this generation is not C.P.U. consuming. To have a simplified representation of the surface of macromolecules, a polyhedron with planar triangular faces is then introduced: Each concave triangular surface piece is replaced with planar triangles relying on its three atomic centers, while saddle-shaped rectangles and convex pieces are wholly ignored. A minimal data structure of the polyhedron is then proposed, which contains only topological informations, since no coordinates have been generated. If the atomic radius is then considered to be constant (independent of atomic type), the surface of a set of N points is now defined by the choice of a subset with a topology. This choice is controlled by a parameter of rugosity (the atomic radius). Contrary to Voronoi polyhedrons partition, which gives a topology for a set of N points, our approach gives a topology only for the exterior points of this set. A few applications of this very simple definition of molecular surface are then discussed: the 3D interactive manipulation of macromolecules, the steric intermolecular recognition, and the determination of local and global properties of the surface.
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Affiliation(s)
- G Perrot
- Laboratoire de R.M.N. et de Modélisation Moléculaire, Institut Lebel, Université L. Pasteur, Strasbourg, France
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Eisenstark A, Perrot G. Catalase has only a minor role in protection against near-ultraviolet radiation damage in bacteria. Mol Gen Genet 1987; 207:68-72. [PMID: 3299003 DOI: 10.1007/bf00331492] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In bacterial cells near-ultraviolet radiation (NUV) generates H2O2 which can be decomposed by endogenous catalase to H2O and O2. To assess the roles of H2O2 and catalase in NUV lethality, we manipulated the amount of intracellular catalase (a) by the use of mutant and plasmid strains with altered endogenous catalase, (b) physiologically, by the addition of glucose, and (c) by induction of catalase synthesis with oxidizing agents. Not only was there no direct correlation between NUV-resistance and catalase activity, but in some cases the correlation was inverse. Also, while there was correlation between NUV and H2O2 sensitivity for most strains tested, there were a number of exceptions which indicates that the modes of killing were different for the two agents.
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Michel H, Briot D, Perrot G, Muller A, Barth P, Gauthier-Lafaye P. [Clinical use in adults of 2 new muscle relaxants: atracurium and vecuronium]. Ann Fr Anesth Reanim 1984; 3:277-83. [PMID: 6148032 DOI: 10.1016/s0750-7658(84)80120-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
115 general and urologic surgery adult patients, ASA class I-II, were divided in four groups according to initial bolus and relaxant used: group A atracurium 0.6 mg X kg-1, group B 0.5 mg X kg-1, group C vecuronium 0.1 mg X kg-1 and group D pancuronium 0.1 mg X kg-1. When the single twitch recovered to 25% of control height (T25), subgroups were individualized depending on whether repeat doses of 1/3 of initial bolus were given or not, and whether reversal was spontaneous or obtained by a standard dose of neostigmine 2.5 mg and atropine 1.25 mg. By ulnar nerve stimulation at the wrist, the force of thumb adduction was recorded on a polygraph; single twitch (tw), train of four (tof) and ratio tof 4/1 (Rtof) were measured. Anaesthesia was induced with thiopentone and fentanyl without premedication and maintained with fentanyl and N2O in oxygen; the trachea was intubated once the block was at its maximum. The onset time of maximal block was 5 min for groups A, B and C, and 7.9 min for group D. T25 was 39.9 +/- 8.5 min for group A, 34.4 +/- 9.7 min for group B, 28.9 +/- 9.9 min for group C and 70.7 +/- 25.9 min for group D. A Rtof equal to 75% was achieved in less than 65 min with atracurium and vecuronium, but much later with pancuronium. Reversal at T25 was efficient, but not really required, for atracurium and vecuronium, but necessary and useful for pancuronium.(ABSTRACT TRUNCATED AT 250 WORDS)
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Perrot G, Muller A, Laugner B. [Accidental overdose of intrathecal morphine. Treatment with intravenous naloxone alone]. Ann Fr Anesth Reanim 1983; 2:412-4. [PMID: 6689252 DOI: 10.1016/s0750-7658(83)80059-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A case of opiate accidental overdose is reported where 8 mg morphine were given by spinal injection. The rapid onset respiratory depression was treated by naloxone alone administered as a continuous infusion (6 mg), together with additional intravenous injections.
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Perrot G, Aubertin L. [Where human warmth and nonverbal relations have their place]. Infirm Can 1977; 19:30-2. [PMID: 242973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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