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Aguiari P, Villani V, Liu Y, Brent G, Perin L, Milanesi A. VP.36 Hypothyroidism impairs skeletal muscle regeneration through dysregulation of MuSCs cell cycle. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.153] [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: 11/07/2022]
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Aguilar R, Zanandrea L, Perin L, Marcondes S, Novaes A, Lodi S, Cazeli A, Zanandrea L, Aguilar D, Andrade G. AVALIAÇÃO DE DOADORES DE SANGUE ENTRE ESTUDANTES DE MEDICINA DE UMA INSTITUIÇÃO DE ENSINO SUPERIOR DO ESPÍRITO SANTO. Hematol Transfus Cell Ther 2020. [DOI: 10.1016/j.htct.2020.10.592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Marcondes S, Novaes A, Cazeli A, Lodi S, Passamani J, Belloti V, Vieira A, Aguilar R, Perin L, Zanandrea L. COVID-19: EXPERIÊNCIA DE ATENDIMENTO DOS PACIENTES ONCO-HEMATOLÓGICOS DO HOSPITAL SANTA CASA DE MISERICÓRDIA DE VITÓRIA. Hematol Transfus Cell Ther 2020. [PMCID: PMC7604103 DOI: 10.1016/j.htct.2020.10.890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Molina I, Perin L, Aviles AS, de Abreu Vieira PM, da Silva Fonseca K, Cunha LM, Carneiro CM. The effect of benznidazole dose among the efficacy outcome in the murine animal model. A quantitative integration of the literature. Acta Trop 2020; 201:105218. [PMID: 31610148 DOI: 10.1016/j.actatropica.2019.105218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 03/22/2019] [Revised: 09/06/2019] [Accepted: 10/10/2019] [Indexed: 12/17/2022]
Abstract
Despite more than 100 years since it was firstly described Chagas disease, only two drugs are available to treat Chagas disease: Nifurtimox launched by Bayer in 1965 and benznidazole launched by Roche in 1971. Drug discovery initiatives have been looking for new compounds as an alternative to these old drugs. Although new platforms have been used with the latest technologies, a critical step on that process still relies on the in vivo model. Unfortunately, to date, available animal models have limited predictive value and there is no standardization. With the aim to better understand the role of benznidazole, the current standard of care of Chagas disease, we performed this review. We intend to analyze the influence of the experimental design of the most used animal model, the murine model, in the assessment of the efficacy endpoint.
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Affiliation(s)
- Israel Molina
- Tropical Medicine Unit, Infectious Disease Department. PROSICS (International Health Program of the Catalan Health Institute), Hospital Universitario Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain; Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil.
| | - Luisa Perin
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Augusto Sao Aviles
- Tropical Medicine Unit, Infectious Disease Department. PROSICS (International Health Program of the Catalan Health Institute), Hospital Universitario Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Paula Melo de Abreu Vieira
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil; Laboratório de Morfopatologia, Departamento de Ciências Biológicas, Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Katia da Silva Fonseca
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Lucas Maciel Cunha
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Claudia M Carneiro
- Laboratório de Imunopatologia, Núcleo de Pesquisas em Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
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Soyer TG, Mendonça DVC, Tavares GSV, Lage DP, Dias DS, Ribeiro PAF, Perin L, Ludolf F, Coelho VTS, Ferreira ACG, Neves PHAS, Matos GF, Chávez-Fumagalli MA, Coimbra ES, Pereira GR, Coelho EAF, Antinarelli LMR. Evaluation of the in vitro and in vivo antileishmanial activity of a chloroquinolin derivative against Leishmania species capable of causing tegumentary and visceral leishmaniasis. Exp Parasitol 2019; 199:30-37. [PMID: 30817917 DOI: 10.1016/j.exppara.2019.02.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 09/04/2018] [Revised: 02/09/2019] [Accepted: 02/23/2019] [Indexed: 12/23/2022]
Abstract
The treatment against leishmaniasis presents problems, since the currently used drugs are toxic and/or have high costs. In addition, parasite resistance has increased. As a consequence, in this study, a chloroquinolin derivative, namely 7-chloro-N,N-dimethylquinolin-4-amine or GF1059, was in vitro and in vivo tested against Leishmania parasites. Experiments were performed to evaluate in vitro antileishmanial activity and cytotoxicity, as well as the treatment of infected macrophages and the inhibition of infection using pre-treated parasites. This study also investigated the GF1059 mechanism of action in L. amazonensis. Results showed that the compound was highly effective against L. infantum and L. amazonensis, presenting a selectivity index of 154.6 and 86.4, respectively, against promastigotes and of 137.6 and 74.3, respectively, against amastigotes. GF1059 was also effective in the treatment of infected macrophages and inhibited the infection of these cells when parasites were pre-incubated with it. The molecule also induced changes in the parasites' mitochondrial membrane potential and cell integrity, and caused an increase in the reactive oxygen species production in L. amazonensis. Experiments performed in BALB/c mice, which had been previously infected with L. amazonensis promastigotes, and thus treated with GF1059, showed that these animals presented significant reductions in the parasite load when the infected tissue, spleen, liver, and draining lymph node were evaluated. GF1059-treated mice presented both lower parasitism and low levels of enzymatic markers, as compared to those receiving amphotericin B, which was used as control. In conclusion, data suggested that GF1059 can be considered a possible therapeutic target to be tested against leishmaniasis.
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Affiliation(s)
- Tauane G Soyer
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Débora V C Mendonça
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Grasiele S V Tavares
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Daniela P Lage
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Daniel S Dias
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Patrícia A F Ribeiro
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luisa Perin
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fernanda Ludolf
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Vinicio T S Coelho
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Andreza C G Ferreira
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Física e Química, Instituto de Ciências Exatas e Informática, Belo Horizonte, Minas Gerais, Brazil
| | - Pedro H A S Neves
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Física e Química, Instituto de Ciências Exatas e Informática, Belo Horizonte, Minas Gerais, Brazil
| | - Guilherme F Matos
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Física e Química, Instituto de Ciências Exatas e Informática, Belo Horizonte, Minas Gerais, Brazil
| | - Miguel A Chávez-Fumagalli
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Elaine S Coimbra
- Departamento de Parasitologia, Microbiologia e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | - Guilherme R Pereira
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Física e Química, Instituto de Ciências Exatas e Informática, Belo Horizonte, Minas Gerais, Brazil
| | - Eduardo A F Coelho
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
| | - Luciana M R Antinarelli
- Programa de Pós-Graduação Em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Perin L, Dal Ri C, Pellanda L. PO473 Nutritional Knowledge, Nutritional Status and Food Consumption of Teachers. Glob Heart 2018. [DOI: 10.1016/j.gheart.2018.09.361] [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: 11/17/2022] Open
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Solez K, Fung KC, Saliba KA, Sheldon VLC, Petrosyan A, Perin L, Burdick JF, Fissell WH, Demetris AJ, Cornell LD. The bridge between transplantation and regenerative medicine: Beginning a new Banff classification of tissue engineering pathology. Am J Transplant 2018; 18:321-327. [PMID: 29194964 PMCID: PMC5817246 DOI: 10.1111/ajt.14610] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 11/21/2017] [Accepted: 11/24/2017] [Indexed: 01/25/2023]
Abstract
The science of regenerative medicine is arguably older than transplantation-the first major textbook was published in 1901-and a major regenerative medicine meeting took place in 1988, three years before the first Banff transplant pathology meeting. However, the subject of regenerative medicine/tissue engineering pathology has never received focused attention. Defining and classifying tissue engineering pathology is long overdue. In the next decades, the field of transplantation will enlarge at least tenfold, through a hybrid of tissue engineering combined with existing approaches to lessening the organ shortage. Gradually, transplantation pathologists will become tissue-(re-) engineering pathologists with enhanced skill sets to address concerns involving the use of bioengineered organs. We outline ways of categorizing abnormalities in tissue-engineered organs through traditional light microscopy or other modalities including biomarkers. We propose creating a new Banff classification of tissue engineering pathology to standardize and assess de novo bioengineered solid organs transplantable success in vivo. We recommend constructing a framework for a classification of tissue engineering pathology now with interdisciplinary consensus discussions to further develop and finalize the classification at future Banff Transplant Pathology meetings, in collaboration with the human cell atlas project. A possible nosology of pathologic abnormalities in tissue-engineered organs is suggested.
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Affiliation(s)
- K. Solez
- Department of Laboratory Medicine and PathologyFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada
| | - K. C. Fung
- Department of Laboratory Medicine and PathologyFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada
| | - K. A. Saliba
- Department of Laboratory Medicine and PathologyFaculty of Medicine and DentistryUniversity of AlbertaEdmontonABCanada
| | - V. L. C. Sheldon
- Medical Anthropology ProgramDepartment of AnthropologyFaculty of Arts and SciencesUniversity of TorontoTorontoOntarioCanada
| | - A. Petrosyan
- Division of Urology GOFARR Laboratory for Organ Regenerative Research and Cell TherapeuticsChildren's Hospital Los AngelesSaban Research InstituteUniversity of Southern CaliforniaLos AngelesCAUSA
| | - L. Perin
- Division of Urology GOFARR Laboratory for Organ Regenerative Research and Cell TherapeuticsChildren's Hospital Los AngelesSaban Research InstituteUniversity of Southern CaliforniaLos AngelesCAUSA
| | - J. F. Burdick
- Department of SurgeryJohns Hopkins School of MedicineBaltimoreMDUSA
| | - W. H. Fissell
- Department of MedicineVanderbilt University Medical CenterNashvilleTNUSA
| | - A. J. Demetris
- Department of PathologyUniversity of PittsburghUPMC‐MontefiorePittsburghPAUSA
| | - L. D. Cornell
- Department of Laboratory Medicine and PathologyMayo ClinicRochesterMNUSA
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Barbon F, Perin L, Domênico B, Pancotte L, Ghiggi P, Calza J. Interferência da Distância de Fotopolimerização na Intensidade da Luz Emitida pelos Fotopolimerizadores à Luz LED. J Oral Invest 2015. [DOI: 10.18256/2238-510x/j.oralinvestigations.v4n1p4-8] [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] Open
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Gross O, Perin L, Deltas C. Alport syndrome from bench to bedside: the potential of current treatment beyond RAAS blockade and the horizon of future therapies. Nephrol Dial Transplant 2014; 29 Suppl 4:iv124-30. [DOI: 10.1093/ndt/gfu028] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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10
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Cabrol S, Perin L, Colle M, Coutant R, Jésuran-Perelroizen M, Le Bouc Y, Czernichow P. Evolution of IGF-1 in children born small for gestational age and with growth retardation, treated by growth hormone adapted to IGF-1 levels after 1 year. Horm Res Paediatr 2012; 76:419-27. [PMID: 22156543 DOI: 10.1159/000334651] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Accepted: 10/25/2011] [Indexed: 11/19/2022] Open
Abstract
AIM This study was designed to estimate the percentage of growth hormone (GH)-treated children born small for gestational age (SGA), with serum IGF-1 >2 SDS before and after GH dose adaptation. METHODS SGA boys aged 4-9 and girls aged 4-7 with a height <-2 SDS and an annual growth rate below the mean received a subcutaneous GH dose of 57 μg/kg/day for 2 years. The GH dose was to be decreased by 30% in children with serum IGF-1 >2 SDS at 12 months and on the previous sample. The GH dose could be reduced a second time to 35 μg/kg·day. IGF-1 and IGFBP-3 dosages were centralized. RESULTS Among the 49 (21 boys) children included in the study, 8 (16.3%) had an IGF-1 >2 SDS consecutively at 9 and 12 months (95% CI 7.3, 29.7). The GH dose was decreased in 6/8 children. However, IGF-1 levels were elevated at several nonconsecutive determinations in 45% (95% CI 28.4, 56.6) of the patients. CONCLUSION A high IGF-1 level is observed in 45% of the GH SGA-treated children with a relatively high dose of GH. A 30% reduction in the GH dose causes a decrease in IGF-1 below 2 SDS in most children.
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Affiliation(s)
- S Cabrol
- Department of Paediatric Endocrinology, APHP, Hôpital Armand-Trousseau, Centre de Référence Maladies Endocriniennes Rares de la Croissance (CRMERC) and Research Unit 938 Inserm-UPMC Paris VI, Paris, France
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Perin L, Giuliani S, Jin D, Sedrakyan S, Carraro G, Habibian R, Warburton D, Atala A, De Filippo RE. Renal differentiation of amniotic fluid stem cells. Cell Prolif 2007; 40:936-48. [PMID: 18021180 DOI: 10.1111/j.1365-2184.2007.00478.x] [Citation(s) in RCA: 169] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES The role of stem cells in regenerative medicine is evolving rapidly. Here, we describe the application, for kidney regeneration, of a novel non-genetically modified stem cell, derived from human amniotic fluid. We show that these pluripotent cells can develop and differentiate into de novo kidney structures during organogenesis in vitro. MATERIALS AND METHODS Human amniotic fluid-derived stem cells (hAFSCs) were isolated from human male amniotic fluid obtained between 12 and 18 weeks gestation. Green fluorescent protein and Lac-Z-transfected hAFSCs were microinjected into murine embryonic kidneys (12.5-18 days gestation) and were maintained in a special co-culture system in vitro for 10 days. Techniques of live microscopy, histology, chromogenic in situ hybridization and reverse transcriptase polymerase chain reaction were used to characterize the hAFSCs during their integration and differentiation in concert with the growing organ. RESULTS Green fluorescent protein and Lac-Z-transfected hAFSCs demonstrated long-term viability in organ culture. Histological analysis of injected kidneys revealed that hAFSCs were capable of contributing to the development of primordial kidney structures including renal vesicle, C- and S-shaped bodies. Reverse transcriptase polymerase chain reaction confirmed expression of early kidney markers for: zona occludens-1, glial-derived neurotrophic factor and claudin. CONCLUSIONS Human amniotic fluid-derived stem cells may represent a potentially limitless source of ethically neutral, unmodified pluripotential cells for kidney regeneration.
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Affiliation(s)
- L Perin
- Childrens Hospital Los Angeles, Saban Research Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90027, USA
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Perin L, Martínez-Aguilar L, Paredes-Valdez G, Baldani JI, Estrada-de Los Santos P, Reis VM, Caballero-Mellado J. Burkholderia silvatlantica sp. nov., a diazotrophic bacterium associated with sugar cane and maize. Int J Syst Evol Microbiol 2006; 56:1931-1937. [PMID: 16902033 DOI: 10.1099/ijs.0.64362-0] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [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: 11/18/2022] Open
Abstract
In a previous study, nitrogen-fixing isolates were recovered from the rhizosphere of maize and from surface-sterilized leaves of sugar cane cultivated in Rio de Janeiro, Brazil. On the basis of 16S rRNA gene sequence similarities, these isolates were identified as belonging to the genus Burkholderia, and whole-cell-protein profiles demonstrated that they are closely related to each other. In the present study, novel isolates were recovered from the roots of different sugar-cane varieties cultivated in diverse geographical regions of Brazil. Twenty-one nitrogen-fixing isolates were analysed using polyphasic taxonomy criteria, including DNA-DNA relatedness, 16S rRNA gene sequence similarities, fatty acid profiles, whole-cell-protein patterns and multilocus enzyme electrophoresis profiles, as well as morphological, physiological and biochemical characterization. The analysis confirmed that these isolates belong to a novel species within the genus Burkholderia, for which the name Burkholderia silvatlantica sp. nov. is proposed. The type strain, SRMrh-20(T) (=LMG 23149(T)=ATCC BAA-1244(T)), was isolated from the rhizosphere of maize var. Avantis A2345 cultivated in Seropédica, Rio de Janeiro.
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Affiliation(s)
- L Perin
- Embrapa Agrobiology, km 47, BR 465, C.P. 74505, Seropédica, Rio de Janeiro, Brazil
- Universidade Federal Rural do Rio de Janeiro, km 45, BR 465, C.P. 74505, Seropédica, Rio de Janeiro, Brazil
| | - L Martínez-Aguilar
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Ap. Postal 565-A, Cuernavaca, Morelos, Mexico
| | - G Paredes-Valdez
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Ap. Postal 565-A, Cuernavaca, Morelos, Mexico
| | - J I Baldani
- Embrapa Agrobiology, km 47, BR 465, C.P. 74505, Seropédica, Rio de Janeiro, Brazil
| | - P Estrada-de Los Santos
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Ap. Postal 565-A, Cuernavaca, Morelos, Mexico
| | - V M Reis
- Embrapa Agrobiology, km 47, BR 465, C.P. 74505, Seropédica, Rio de Janeiro, Brazil
| | - J Caballero-Mellado
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Ap. Postal 565-A, Cuernavaca, Morelos, Mexico
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Perin L, Martínez-Aguilar L, Castro-González R, Estrada-de Los Santos P, Cabellos-Avelar T, Guedes HV, Reis VM, Caballero-Mellado J. Diazotrophic burkholderia species associated with field-grown maize and sugarcane. Appl Environ Microbiol 2006; 72:3103-10. [PMID: 16672447 PMCID: PMC1472400 DOI: 10.1128/aem.72.5.3103-3110.2006] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Until recently, diazotrophy was known in only one of the 30 formally described species of Burkholderia. Novel N(2)-fixing plant-associated Burkholderia species such as B. unamae, B. tropica, and B. xenovorans have been described, but their environmental distribution is scarcely known. In the present study, the occurrence of N(2)-fixing Burkholderia species associated with different varieties of sugarcane and maize growing in regions of Mexico and Brazil was analyzed. Only 111 out of more than 900 isolates recovered had N(2)-fixing ability as demonstrated by the acetylene reduction assay. All 111 isolates also yielded a PCR product with primers targeting the nifH gene, which encodes a key enzyme in the process of nitrogen fixation. These 111 isolates were confirmed as belonging to the genus Burkholderia by using a new 16S rRNA-specific primer pair for diazotrophic species (except B. vietnamiensis) and closely related nondiazotrophic Burkholderia. In Mexico, many isolates of B. unamae (predominantly associated with sugarcane) and B. tropica (more often associated with maize) were recovered. However, in Brazil B. tropica was not identified among the isolates analyzed, and only a few B. unamae isolates were recovered from one sugarcane variety. Most Brazilian diazotrophic Burkholderia isolates (associated with both sugarcane and maize plants) belonged to a novel species, as revealed by amplified 16S rRNA gene restriction profiles, 16S rRNA gene sequencing, and protein electrophoresis. In addition, transmissibility factors such as the cblA and esmR genes, identified among clinical and environmental isolates of opportunistic pathogens of B. cenocepacia and other species of the B. cepacia complex, were not detected in any of the plant-associated diazotrophic Burkholderia isolates analyzed.
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Affiliation(s)
- L Perin
- Universidade Federal Rural do Rio de Janeiro, km. 45, BR 465, CP 74505, Seropédica, Rio de Janeiro, Brazil
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Raynaud-Simon A, Perin L, Meaume S, Lesourd B, Moulias R, Postel-Vinay MC, Le Bouc Y. IGF-I, IGF-I-binding proteins and GH-binding protein in malnourished elderly patients with inflammation receiving refeeding therapy. Eur J Endocrinol 2002; 146:657-65. [PMID: 11980621 DOI: 10.1530/eje.0.1460657] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To investigate the mechanisms determining the success or failure of refeeding therapy in malnourished elderly patients with inflammation by studying changes in plasma IGF-I, GH-binding protein (GHBP) and IGF-binding protein (IGFBP) levels and IGFBP-3 proteolysis. DESIGN AND METHODS We studied 15 severely malnourished hospitalized elderly patients. Weight, food intake, plasma albumin, transthyretin, C-reactive protein (CRP), orosomucoid, interleukin-6 (IL-6), IGF-I, intact and proteolytically degraded IGFBP-3 and GHBP levels were determined on admission and during refeeding therapy designed to increase food intake to 40 kcal/kg body weight per day (15% protein). RESULTS Plasma IGF-I, IGFBP-3 and GHBP levels were significantly low for age on admission in all malnourished elderly patients. They increased in nine patients as nutritional status improved (albuminemia >30 g/l; transthyretinemia >200 mg/l or weight gain >5% of initial body weight) and levels of inflammation markers decreased (group 1). In contrast, plasma IGF-I, IGFBP-3 and GHBP levels remained low in six patients in whom nutritional status failed to improve and levels of inflammation markers increased (group 2). IGF-I showed greater variations than IGFBP-3 or GHBP with respect to nutritional status. High plasma CRP and IL-6 levels were associated with high levels of IGFBP-3 proteolysis. CONCLUSION Efficient refeeding therapy was associated with a significant increase in IGF-I plasma levels. In patients with severe and persistent inflammation, high levels of proteolysis of IGFBP-3 may have contributed to the low plasma IGF-I levels, persistence of hypercatabolism and lack of improvement in nutritional status.
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Affiliation(s)
- A Raynaud-Simon
- Unite de Nutrition Gériatrique, Hôpital Charles Foix AP-HP, F-94205 Ivry sur Seine, France.
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15
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Ducos B, Cabrol S, Houang M, Perin L, Holzenberger M, Le Bouc Y. IGF type 1 receptor ligand binding characteristics are altered in a subgroup of children with intrauterine growth retardation. J Clin Endocrinol Metab 2001; 86:5516-24. [PMID: 11701730 DOI: 10.1210/jcem.86.11.7985] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
The IGFs, IGF-I and IGF-II, regulate fetal growth by activating IGF type 1 receptors (IGF-IR). We aimed to quantify the binding of IGF-I to its cognate receptors in intrauterine growth-retarded children (IUGR). We measured the affinity of the erythrocyte IGF-IR and the number of IGF-IR receptors in 17 children with retarded growth (mean height, -2.7 SD), normal levels of GH, and a history of idiopathic intrauterine growth retardation (height at birth, -10 to -2 SD; mean, -3.1 SD). These children had reduced receptor affinity (Kd = 0.47 nM; P < 0.01) and more receptors per cell [binding capacity (Bmax) = 11.7 binding sites/cell; P < 0.05)] compared with control children (Kd = 0.32 nM; Bmax = 7.8 binding sites/cell). Moreover, the distributions of Kd and Bmax suggested that there were two groups of IUGR children. Group 1 included subjects with normal receptor binding function (Kd = 0.36 nM; Bmax = 8.2 sites/cell) and normal levels of circulating IGF-I. Group 2 comprised children with low receptor affinity (Kd = 0.56 nM) and increased receptor number (Bmax = 14.7 sites/cell). This group showed significantly decreased IGF-I levels (-2.1 SD; P < 0.01). We investigated these IGF-IR binding parameters in two additional groups of growth-retarded children (Turner syndrome and patients with chronic renal failure), in whom the IGF-I axis was not believed to be the primary cause, and found that Kd and Bmax were normal or nearly normal. We also measured IGF-IR binding parameters in 4 Seckel syndrome patients with IUGR and severely retarded growth (mean height, -7.9 SD). Their receptor affinity was reduced, but not statistically different, from that in controls, and their receptor number was normal, whereas IGF-I levels were elevated. Our results suggest heterogeneous alterations in IGF-IR binding function in IUGR patients.
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Affiliation(s)
- B Ducos
- Laboratoire d'Explorations Fonctionnelles Endocriniennes, Hôpital d'Enfants Armand Trousseau, Assistance Publique des Hôpitaux de Paris (AP-HP), and INSERM, U-515, Hôpital Saint-Antoine, 75571 Paris, France
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16
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Houang M, Cabrol S, Perin L, Ducos B, Bensman A, Le Bouc Y. Insulin-like growth factor-I (IGF-I), insulin-like growth factor binding proteins (IGFBP) and insulin-like growth factor type I receptor in children with various status of chronic renal failure. Growth Horm IGF Res 2000; 10:332-341. [PMID: 11161964 DOI: 10.1054/ghir.2000.0178] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Chronic renal failure in childhood causes severe growth retardation. The aim of the study was to identify whether changes in the IGF system could account for the growth retardation observed in children with chronic renal failure. Insulin-like growth factor (IGF-I) serum concentrations, insulin-like growth factor binding proteins (IGFBP) and/or IGF-I binding to erythrocyte type I receptor of IGF were analysed in 69 children (mean age 11.6 +/- 4.3 years) with chronic renal failure and growth retardation (mean height -2.6 +/- 1.8 SD). The study population was separated into three groups, according to their renal status, children on conservative treatment (CRF group: n = 30), on haemodialysis (ESRD group: n = 26) and those transplanted (RT group: n = 13). Nineteen of these children, some from each of the three groups, received recombinant growth hormone therapy (rhGH). Mean basal IGF-I serum concentrations were -0.7 +/- 1.2 SD in the CRF group, + 2.1 +/- 3 SD in the ESRD group and + 1.1 +/- 2 SD in the RT group. Under rhGH therapy, as height velocity improved, mean IGF-I concentrations increased up to + 3.1 +/- 0.6 SD in the CRF group, to + 6.9 +/- 2.8 SD in the ESRD group and to + 3.9 +/- 2 SD in the RT group. Basal IGFBP-3 levels, studied by Western Ligand Blot were low in the CRF group and high in the ESRD and normal in the RT groups, whereas IGFBP-2 and a 30-32 kDa IGFBP were always high in all cases. Western immunoblot analysis showed that this 30-32 kDa IGFBP was mostly composed of IGFBP-1 and IGFBP-6 in all three groups, but IGFBP-6 was particularly abundant in the ESRD group. IGFBP-6 concentrations assessed by RIA were moderately increased in CRF children (392 +/- 177 ng/mL) and very high in children on ESRD (2094 +/- 1525 ng/mL) when compared to normal values (131 +/- 42 ng/mL). Binding studies of IGF type I receptor showed that there was no particular difference in IGF-I binding between renal failure patients and normal children. In poorly growing children, especially in ESRD children and to a lesser extent in RT children, high concentrations of IGF-I and IGFBP-1, 2, 3 and 6, suggest a resistance mainly by a sequestration mechanism. Moreover, in the CRF group, especially in the younger children, low levels of IGF-I and IGFBP-3 are evocative of an associated resistance at the GH receptor level.
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Affiliation(s)
- M Houang
- Service d'explorations fonctionnelles endocriniennes, Hopital Armand Trousseau, AP-HP, Paris, 75012, France.
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17
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Holzenberger M, Leneuve P, Hamard G, Ducos B, Perin L, Binoux M, Le Bouc Y. A targeted partial invalidation of the insulin-like growth factor I receptor gene in mice causes a postnatal growth deficit. Endocrinology 2000; 141:2557-66. [PMID: 10875258 DOI: 10.1210/endo.141.7.7550] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The insulin-like growth factor (IGF) system is a major regulator of somatic growth in vertebrates. Both ligands (IGF-I and IGF-II) signal via the same IGF receptor (IGF-IR). Classical IGF-IR invalidation is lethal at birth, so that conditional models are needed to study the postnatal role of this receptor. To establish a genetically inducible invalidation of IGF-IR, we targeted the IGF-IR gene using a construct that introduced a neomycin resistance cassette into intron 2, leaving the rest of the gene intact. This neomycin resistance cassette interfered with the processing of the primary transcript, resulting in there being 12% fewer IGF-binding sites at the cell surface in heterozygous mice and 41% fewer in homozygous mice. Hetero- and homozygous offspring grew more slowly than their wild-type littermates. This difference was noticeable from 4 weeks after birth and was significant from 5 weeks after birth in males. In females, the effect on postnatal growth of insertion of the neo cassette was not significant. In males, IGF-I levels increased moderately (+26%) but significantly, indicating effective feedback regulation of the IGF system. IGF-binding protein-4 (IGFBP-4) levels, estimated by Western ligand blotting, were low in homozygotes (-38%), whereas IGFBP-1, -2, and -3 levels were unaffected. In females, IGF-I and IGFBP-1, -2, -3, and -4 levels did not differ significantly among heterozygous, homozygous, and wild-type animals. We investigated the molecular mechanism involved and characterized two RNA-splicing events that could account for the decrease in IGF-IR. The phenotype of these mice developed exclusively postnatally, and body proportions were maintained. IGF-IRneo mice constitute a new model for human postnatal growth deficiency.
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18
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Logié A, Boulle N, Gaston V, Perin L, Boudou P, Le Bouc Y, Gicquel C. Autocrine role of IGF-II in proliferation of human adrenocortical carcinoma NCI H295R cell line. J Mol Endocrinol 1999; 23:23-32. [PMID: 10425444 DOI: 10.1677/jme.0.0230023] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In adrenocortical tumors, the malignant phenotype is associated with rearrangements (paternal isodisomy) at the 11p15 locus and IGF-II gene overexpression, strongly suggesting that the IGF system is a major determinant of adrenocortical tumor progression. The aim of this study was to validate an in vitro model for investigating the involvement of the IGF system in adrenocortical tumorigenesis. We analyzed the production of IGF mRNA and proteins, IGF-binding proteins (IGFBPs) and IGF receptors by the NCI H295R cell line, which is derived from a human adult adrenocortical carcinoma. H295R cells were shown to proliferate for a long period (26 days) in the absence of serum or any added growth factor. Northern blot analyses showed high IGF-II mRNA contents in H295R cells. The cells secreted large amounts of IGF-II protein (14 ng/10(6) cells per 48 h) although no IGF-I protein was detected. Western ligand blot analyses of conditioned media detected the presence of large amounts of a 34 kDa protein, which was identified as IGFBP-2 by immunoblotting. The presence of high-affinity binding sites for IGF-I and IGF-II on H295R cells was shown by binding experiments using radiolabeled IGFs and confirmed by reverse transcription PCR analyses showing type 1 and type 2 IGF receptors. Proliferation of H295R cells was inhibited by anti-IGF-II antibody (45%) and by anti-type 1 IGF receptor antibody (53%) indicating that IGF-II is an autocrine growth factor for these cells and that its effects are, at least in part, mediated by the type 1 IGF receptor. These findings confirm the involvement of the IGF system in adrenocortical tumors and suggest that the H295R cell line is a suitable in vitro model for studying the molecular mechanisms of adrenocortical tumor proliferation.
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Affiliation(s)
- A Logié
- Laboratoire d'Explorations Fonctionnelles Endocriniennes, Hôpital Trousseau AP-HP, Paris, France
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19
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Boulle N, Logié A, Gicquel C, Perin L, Le Bouc Y. Increased levels of insulin-like growth factor II (IGF-II) and IGF-binding protein-2 are associated with malignancy in sporadic adrenocortical tumors. J Clin Endocrinol Metab 1998; 83:1713-20. [PMID: 9589681 DOI: 10.1210/jcem.83.5.4816] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In adrenocortical tumors, malignancy is strongly associated with insulin-like growth factor II (IGF-II) gene overexpression and abnormalities at the 11p15 locus, suggesting a role for this growth factor in adrenocortical tumorigenesis. To further investigate this role, the IGF/IGF-binding protein (IGFBP) system was analyzed in 18 adrenocortical tumors, classified into 2 groups on the basis of their IGF-II messenger ribonucleic acid (mRNA) content (group 1, normal IGF-II mRNA content, mostly benign tumors; group 2, high IGF-II mRNA content, mostly malignant tumors). Group 2 tumors contained 10 times more IGF-II protein than group 1 tumors or normal adrenal tissue (P < 0.001), indicating efficient translation of IGF-II mRNA in malignant tumors. Western ligand blotting detected various functional IGFBPs in normal adrenocortical glands and tumors: a doublet of 39-42 kDa identified by immunoblotting as IGFBP-3, a band at 32 kDa, and bands at 29-30 and 24 kDa. Total IGFBP-3 protein levels were similar in the two groups of tumors. By contrast, malignant tumors differed from benign ones by specific expression of the 32-kDa IGFBP. Immunoblotting identified this 32-kDa band together with a proteolytic fragment of 25 kDa as IGFBP-2, and quantitative analysis showed significantly higher levels of total IGFBP-2 in malignant tumors than in benign tumors (P < 0.001). Despite enhanced levels of IGBP-2 protein in malignant tumors, no increase in IGFBP-2 mRNA levels was detected, suggesting post-transcriptional regulation of this IGFBP. These results confirm the major role of IGF-II in adrenocortical tumorigenesis and suggest that IGFBP-2 may be a regulator of IGF-II proliferative effects in this tumor system.
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Affiliation(s)
- N Boulle
- Laboratoire d'Explorations Fonctionnelles Endocriniennes, Hôpital Trousseau, Paris, France
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20
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Le Bouc Y, Bellocq A, Philippe C, Perin L, Garabedian M, Fouqueray B, Zacharias C, Cadranel J, Baud L. Insulin-like growth factors and their binding proteins in pleural fluid. Eur J Endocrinol 1997; 137:467-73. [PMID: 9405025 DOI: 10.1530/eje.0.1370467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We investigated the expression and potential regulatory role of insulin-like growth factors (IGFs) and their specific binding proteins (BPs) in tuberculous and nontuberculous pleuritis. By using a radioimmunoassay after acid gel filtration chromatography, we found that mean concentrations of IGF-I were 211.9 +/- 20.2 microg/l and 203.2 +/- 31.1 microg/l in pleural fluid of 14 patients with tuberculous pleuritis and 9 patients with malignant pleuritis respectively. These values were near those in serum of the same patients (221.3 +/- 19.5 microg/l and 204.6 +/- 21.0 microg/l respectively). By using a specific protein-binding assay, we found that mean concentrations of IGF-II were 345.3 +/- 61.0 microg/l and 167.6 +/- 22.7 microg/l in tuberculous and malignant pleural effusions respectively. These values were significantly lower than those in serum of the same patients (628.3 +/- 79.0 microg/l, P<0.025 and 532.0 +/- 85.9 microg/l, P<0.025 respectively). Because bioavailability and bioactivity of IGFs may be regulated by their binding to IGFBPs, we studied IGFBP patterns in the pleural fluid of 6 patients with tuberculous pleuritis. As assessed by Western ligand blotting the levels of IGFBP-1 and IGFBP-2 were increased whereas those of IGFBP-3 were decreased in pleural fluid in comparison with serum. The decrease in IGFPB-3 levels reflected increased proteolysis, as assessed by Western immunoblotting. In spite of this presence of IGFBPs, IGFs could be responsible for the local biosynthesis of 1.25-dihydroxyvitamin D (1,25-(OH)2D) since pleural fluid levels of both IGF-I and IGF-II significantly correlated with those of 1,25-(OH)2D. These results indicate that IGFs are detectable in pleural fluid and may contribute to control the activity of 25-hydroxyvitamin D-1alpha hydroxylase in tuberculous pleuritis.
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Affiliation(s)
- Y Le Bouc
- Laboratoire de Physiologie, Hôpital Trousseau, Paris, France
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21
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Le Bouc Y, Perin L, Cabrol S, Gourmelen M. [IGF-I and its regulation system]. Arch Pediatr 1996; 3 Suppl 1:141s-143s. [PMID: 8795995 DOI: 10.1016/0929-693x(96)86020-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Y Le Bouc
- Laboratoire d'explorations fonctionnelles endocriniennes, hôpital d'Enfants Armand-Trousseau, Paris, France
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Houang M, Perin L, Cabrol S, Bensman A, Le Bouc Y. Taux sériques d'IGPI ei variations d'IGF BP3 chez des enfants insuffisants rénaux chroniques. Arch Pediatr 1995. [DOI: 10.1016/0929-693x(95)90252-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: 11/26/2022]
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23
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Lassarre C, Lalou C, Perin L, Binoux M. Protease-induced alteration of insulin-like growth factor binding protein-3 as detected by radioimmunoassay. Agreement with ligand blotting data. Growth Regul 1994; 4:48-55. [PMID: 7524885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Structural alteration of insulin-like growth factor binding protein-3 (IGFBP-3) resulting from limited proteolysis by one or more serine proteases in vivo was first described in the serum of pregnant women and in certain pathological conditions. Western immunoblotting has since been employed to detect the phenomenon in normal serum, using a polyclonal antibody raised against recombinant human IGFBP-3 and a highly sensitive technique of visualization by chemiluminescence. The major proteolytic fragment of 30 kDa, which fails to be detected in native serum by ligand blotting owing to its weak affinity for IGFs, has proved clearly visible in all serum samples tested, sometimes accompanied by smaller fragments of 20 and 16 kDa. Among the serum samples analysed, increasing proportions of proteolysed IGFBP-3 were found in the following order: acromegalic patients, normal subjects, GH-deficient patients, pregnant women. In RIAs done with the same antibody, many of the serum samples yielded dose-response curves which were not parallel with standard curves, with lower gradients. In the samples where measurements were possible, apparent IGFBP-3 levels proved lower in pregnant women (2.28 +/- 0.23 mg/l, mean +/- SEM) than in normal adults (4.26 +/- 0.33 mg/l, P < 0.001). These observations, which contradict earlier reports of higher levels in pregnant women, suggest that the 30 kDa proteolytic fragment has a weaker affinity for the antibody than the intact IGFBP-3 (which in ligand- and immunoblotting appears as a characteristic 42-39 kDa doublet and which is barely or not detectable in pregnancy serum).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Lassarre
- Institut National de la Santé et de la Recherche Médicale, Unité de Recherches sur la Régulation de la Croissance (U.142), Hôpital Saint Antoine, Paris, France
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Abstract
Insulin-like growth factors (IGFs), initially known as somatomedins, and their specific, high-affinity binding proteins (IGFBPs) are synthesized in most tissues, but principally in the liver. The interest of measuring their circulating levels, which reflect liver production, is to obtain indications as to their endocrine function and regulation. IGF-I plays a pivotal role in post-natal growth. Its half-life is significantly increased by its association with IGFBPs and its serum levels reflect somatotropic status, unlike growth hormone (GH) which has a much shorter half-life and whose secretion comes in pulses. Since investigation of growth retardation must include the most finely tuned appreciation possible of somatotropic secretion, assays of IFG-I and electrophoretic analysis of IGFBP profile can be useful tools, both diagnostically and therapeutically, and can help in determining the need or otherwise for GH treatment, especially in view of the growing demand for such therapy.
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Affiliation(s)
- M Gourmelen
- Laboratoire d'Explorations Fonctionnelles Endocriniennes, Hôpital Armand-Trousseau, Paris, France
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Bianchi M, Fantuzzi G, Bertini R, Perin L, Salmona M, Ghezzi P. The pneumotoxicant paraquat induces IL-8 mRNA in human mononuclear cells and pulmonary epithelial cells. Cytokine 1993; 5:525-30. [PMID: 8142610 DOI: 10.1016/1043-4666(93)90045-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Paraquat (PQ) is a herbicide which is highly pneumotoxic by generating reactive oxygen intermediates (ROI). Pro-inflammatory cytokines, particularly IL-1 and TNF, have been implicated in some ROI-mediated pathologies, including bleomycin toxicity and ischaemia/reperfusion injury. We have studied the effect of PQ on the expression of the neutrophil chemotactic cytokine, IL-8, by human peripheral blood mononuclear cells (PBMC). While almost no IL-8 mRNA was detected in unstimulated cells, PQ (100 microM) induced high mRNA expression with a maximum at 24 h of incubation. While PQ did stimulate the appearance of IL-8 mRNA, no significant production of IL-8 protein was detected. However, PQ potentiated the production of IL-8 in the presence of 1 ng/ml of endotoxin (lipopolysaccharide, LPS). This was paralleled by an increased production of chemotactic activity for neutrophils, indicating that the IL-8 was actually bioactive. Stimulation of IL-8 mRNA by PQ was suppressed by IL-4 and by free radical scavengers (dimethylsulfoxide, mannitol). Increased IL-8 expression by PQ was also observed in the human pulmonary epithelial cell line A549 indicating that the effect of PQ was not specific for PBMC. These findings suggest that IL-8 might be involved in the pulmonary effects of PQ and that its production might be stimulated following an oxidative insult, and might clarify the pathogenetic mechanisms of adult respiratory distress syndrome (ARDS) or oxidant-induced pulmonary fibrosis.
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Affiliation(s)
- M Bianchi
- Mario Negri Institute for Pharmacological Research, Milan, Italy
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26
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Salmona M, Donnini M, Perin L, Diomede L, Romano M, Marini MG, Tacconi MT, Luisetti M. A novel pharmacological approach for paraquat poisoning in rat and A549 cell line using ambroxol, a lung surfactant synthesis inducer. Food Chem Toxicol 1992; 30:789-94. [PMID: 1427517 DOI: 10.1016/0278-6915(92)90081-u] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Paraquat (PQ) is a widely used herbicide that causes acute adult respiratory distress syndrome (ARDS) and chronic lung damage (diffuse fibrosis). One of the earliest biochemical effects induced by PQ is damage to type II pneumocytes with consequent depletion of surfactant. With the aim of counteracting the toxic effects of PQ, a series of investigations were performed into the possible protective effect of the drug ambroxol, which induces the synthesis of surfactant in lung alveolar type II cells. The number of survivors and survival time of rats treated ip with 35 mg PQ/kg was significantly increased by 3 days of ambroxol pretreatment and by ambroxol treatment 30 min or 2 hr after PQ. Total phospholipid content in lung and bronchoalveolar lavage fluid (BALF) was significantly reduced 30 hr after treatment with PQ alone. The association of ambroxol with PQ significantly antagonized this reduction. In BALF the ratio between palmitic acid and stearic acid concentrations was significantly lower in animals treated with PQ alone but was returned to normal by the association with ambroxol. The cell line A549, exposed in vitro to PQ concentrations from 0.5 x 10(-4) to 2 x 10(-3) M, showed a significant dose-dependent loss of viability. Cells pretreated with ambroxol (10 mg/ml) were more resistant to PQ and their viability started to decrease significantly only from a PQ concentration of 0.8 x 10(-3) M. Membrane microviscosity was measured on the same cells. Cells treated with PQ alone showed a reduction of membrane microviscosity, which was significantly counteracted by ambroxol pretreatment. The curves of modification of membrane microviscosity of cells treated with PQ and with ambroxol plus PQ paralleled those of cell viability, indicating that the stimulation of surfactant synthesis in vitro may be a prerequisite for counteracting some of the early effects of PQ.
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Affiliation(s)
- M Salmona
- Laboratory for Enzyme Research, Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
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27
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Gourmelen M, Perin L, Binoux M. Effects of exogenous insulin-like growth factor I on insulin-like growth factor binding proteins in a case of growth hormone insensitivity (Laron-type). Acta Paediatr Scand Suppl 1991; 377:115-7. [PMID: 1723834 DOI: 10.1111/apa.1991.80.s377.115] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The electrophoretic profiles of serum insulin-like growth factor binding proteins (IGFBPs) from an 18-year-old patient with growth hormone (GH) insensitivity were analysed by Western ligand blotting before and after administration of recombinant human insulin-like growth factor I (IGF-I). Under basal conditions, the profile was the same as that observed in all cases of GH deficiency or insensitivity, that is, low IGFBP-3 (seen as two bands of 41.5 and 38.5 kDa) and enhanced IGFBP-2 and, to a lesser extent, IGFBP-1. Subcutaneous injection of IGF-I, 40 micrograms/kg, provoked an increase in serum IGF-I levels to close to the lower limits of the normal range and a small increase in IGFBP-3, suggesting that IGF-I has a direct effect on the synthesis of this GH/IGF-I-dependent IGFBP. Moderate increases were also observed in IGFBP-2 and IGFBP-4. Repeated doses of IGF-I over 7 days had no further effect on these changes, which persisted for a few days after the last injection.
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Affiliation(s)
- M Gourmelen
- Laboratoire Central d'Explorations Endocriniennes, Hôpital d'Enfants Armand Trousseau, Paris, France
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28
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Perin L, Donnini M, Diomede L, Romano M, Tacconi MT, Luisetti M, Salmona M. Protection against acute paraquat toxicity by ambroxol. Cytotechnology 1991; 5:25-7. [DOI: 10.1007/bf00736800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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29
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Taraboletti G, Perin L, Bottazzi B, Mantovani A, Giavazzi R, Salmona M. Membrane fluidity affects tumor-cell motility, invasion and lung-colonizing potential. Int J Cancer 1989; 44:707-13. [PMID: 2793242 DOI: 10.1002/ijc.2910440426] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Membrane fluidity, determined by steady-state fluorescence polarization measurements, was correlated with metastatic capacity of murine tumor-cell lines. A correlation was observed in cell lines with different metastatic potential, and was confirmed when their lung-colonizing ability was modulated by alteration of either the membrane lipid composition or the culture conditions. Two cellular functions, motility and basement membrane invasion, were affected by the membrane lipid composition, and might explain the role of membrane fluidity observed in cancer metastasis.
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Affiliation(s)
- G Taraboletti
- Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy
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30
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Perin L. [Considerations on syphilis morbidity in prostitutes]. Gaz Med Fr 1958; 65:1709-10. [PMID: 13609844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
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