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García-Rivera C, Navarro M, Parra M, Sánchez Bautista A, Gómez I, Ventero MP, Rodríguez JC. [In vitro activity of delafloxacin against clinical isolates of carbapenem-resistant Pseudomonas aeruginosa in a stage prior to the clinical use of this drug]. Rev Esp Quimioter 2024; 37:104-105. [PMID: 38140799 PMCID: PMC10874670 DOI: 10.37201/req/080.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/25/2023] [Accepted: 11/03/2023] [Indexed: 12/24/2023]
Affiliation(s)
| | | | | | | | | | - M P Ventero
- María-Paz Ventero, Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL), Av. Pintor Baeza 12, 03010. Alicante, Spain.
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Grossi JR, Parra M, Benalcázar-Jalkh EB, Giovanini AF, Zielak JC, Sebstiani AM, Gonzaga CC, Coelho PG, Witek L, Deliberador TM. Effects of a local single dose administration of growth hormone on the osseointegration of titanium implants. Med Oral Patol Oral Cir Bucal 2022; 27:e174-e180. [PMID: 35218646 PMCID: PMC8898577 DOI: 10.4317/medoral.25164] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/22/2021] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND The aim of the present study was to evaluate the effect of different concentrations of growth hormone (GH) on endosteal implant's surface at the early stages of osseointegration. MATERIAL AND METHODS Sixty tapered acid-etched titanium implants were divided into four groups: i) Collagen, used as a control group; and three experimental groups, where after collagen coating, GH was administered directly to the surface in varying concentrations: ii) 0.265 mg, iii) 0.53 mg, and iv) 1 mg. Implants were placed in an interpolated fashion in the anterior flange of C3, C4 or C5 of 15 sheep with minimum distance of 6 mm between implants. After 3-, 6- and 12-weeks of healing samples were harvested, histologically processed, qualitatively and quantitatively assessed for bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO). RESULTS Statistical analysis as a function of time in vivo and coating resulted in no significant differences for BIC and BAFO at any evaluation time point. Histological evaluation demonstrated similar osseointegration features for all groups with woven bone formation at 3 weeks and progressive replacement of woven for lamellar bone in close contact with the implant surface and within the implant's threads. CONCLUSIONS A single local application of growth hormone to the surface of titanium implants did not yield improved implant osseointegration independent of healing time.
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Affiliation(s)
- J-R Grossi
- Division of Biomaterials New York University College of Dentistry 433 1st Avenue, Room 842 New York, NY 10010-4086 USA
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Insausti A, Calabrese C, Parra M, Usabiaga I, Vallejo-López M, Écija P, Basterretxea FJ, Grabow JU, Caminati W, Lesarri A, Cocinero EJ. Conformational impact of aliphatic side chains in local anaesthetics: benzocaine, butamben and isobutamben. Chem Commun (Camb) 2020; 56:6094-6097. [PMID: 32352456 DOI: 10.1039/d0cc00760a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We studied the impact of aliphatic side chains on the stability and conformational landscape of the local anaesthetics benzocaine, butamben and isobutamben, combining high-resolution rotational spectroscopy in the microwave and millimetre regions and molecular modelling. The study reveals the connections between alkyl chain flexibility and molecular conformations.
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Affiliation(s)
- A Insausti
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain.
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Parra M, Valenzuela B, Imarai M, Modak B. Obtainment and evaluation of adjuvant effect of the aromatic geranyl derivative Filifolinone in bacterin of Piscirickettsia salmonis. J Fish Dis 2018; 41:157-159. [PMID: 28736920 DOI: 10.1111/jfd.12669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 05/11/2017] [Accepted: 05/15/2017] [Indexed: 06/07/2023]
Affiliation(s)
- M Parra
- Laboratory of Natural Products Chemistry, Centre of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
| | - B Valenzuela
- Laboratory of Natural Products Chemistry, Centre of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
| | - M Imarai
- Laboratory of Immunology, Centre of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
| | - B Modak
- Laboratory of Natural Products Chemistry, Centre of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
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Díaz E, Elgueta E, Sanchez SA, Barberá J, Vergara J, Parra M, Dahrouch M. Hybrid photoluminescent materials containing a benzobisthiazole core for liquid crystal and gel applications. Soft Matter 2017; 13:1804-1815. [PMID: 28169382 DOI: 10.1039/c6sm02650h] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Tetra- and hexacatenar amide compounds containing a linear centrosymmetric benzobisthiazole core were synthesized with good yields. These compounds were characterized and their structures confirmed by elemental analysis, and FT-IR, Maldi mass and NMR spectroscopy. All compounds exhibited excellent thermal stability up to 330 °C. The tetracatenar series containing a double substitution in the meta positions did not show mesomorphic behaviour, whereas the hexacatenar and tetracatenar series having a double substitution in the meta and para positions showed liquid crystal properties with optical textures typical of columnar mesophases corroborated by POM analysis. The mesomorphic properties were dependent on the length, number and position of alkoxy chains attached at the end of the rigid core. XRD studies of the hexacatenar series showed the hexagonal columnar structure of the mesophases. Photoluminescence properties in solution were observed in the visible region, with good quantum yields. In the solid state, these compounds behave as blue emitters and they are able to change colour with acid or base addition. The hexacatenar benzobisthiazole compound with an alkoxy chain of 14 carbons presented properties of a supergelator in chloroform, leading to the formation of a fluorescent organogel material with fluorescence emission in the blue region.
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Affiliation(s)
- E Díaz
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - E Elgueta
- Centro de Investigación de Polímeros Avanzados (CIPA), Universidad de Concepción, Casilla 160-C, Concepción, Chile
| | - S A Sanchez
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile
| | - J Barberá
- Departamento de Química Orgánica, Facultad de Ciencias-Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C, 50009 Zaragoza, Spain
| | - J Vergara
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - M Parra
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - M Dahrouch
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
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Barneda-Zahonero B, Collazo O, Azagra A, Fernández-Duran I, Serra-Musach J, Islam ABMMK, Vega-García N, Malatesta R, Camós M, Gómez A, Román-González L, Vidal A, López-Bigas N, Villanueva A, Esteller M, Parra M. The transcriptional repressor HDAC7 promotes apoptosis and c-Myc downregulation in particular types of leukemia and lymphoma. Cell Death Dis 2015; 6:e1635. [PMID: 25675295 PMCID: PMC4669785 DOI: 10.1038/cddis.2014.594] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 12/16/2014] [Accepted: 12/18/2014] [Indexed: 12/26/2022]
Abstract
The generation of B cells is a complex process requiring several cellular transitions, including cell commitment and differentiation. Proper transcriptional control to establish the genetic programs characteristic of each cellular stage is essential for the correct development of B lymphocytes. Deregulation of these particular transcriptional programs may result in a block in B-cell maturation, contributing to the development of hematological malignancies such as leukemia and lymphoma. However, very little is currently known about the role of transcriptional repressors in normal and aberrant B lymphopoiesis. Here we report that histone deacetylase 7 (HDAC7) is underexpressed in pro-B acute lymphoblastic leukemia (pro-B-ALL) and Burkitt lymphoma. Ectopic expression of HDAC7 induces apoptosis, leads to the downregulation of c-Myc and inhibits the oncogenic potential of cells in vivo, in a xenograft model. Most significantly, we have observed low levels of HDAC7 expression in B-ALL patient samples, which is correlated with the increased levels of c-Myc. From a mechanistic angle, we show that ectopically expressed HDAC7 localizes to the nucleus and interacts with the transcription factor myocyte enhancer factor C (MEF2C) and the corepressors HDAC3 and SMRT. Accordingly, both the HDAC7–MEF2C interaction domain as well as its catalytic domain are involved in the reduced cell viability induced by HDAC7. We conclude that HDAC7 has a potent anti-oncogenic effect on specific B-cell malignancies, indicating that its deregulation may contribute to the pathogenesis of the disease.
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Affiliation(s)
- B Barneda-Zahonero
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - O Collazo
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - A Azagra
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - I Fernández-Duran
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - J Serra-Musach
- Breast Cancer and Systems Biology Unit, Translational Research Laboratory, Catalan Institute of Oncology (ICO), Bellvitge Institute for Biomedical Research (IDIBELL), Avenida Gran Via s/n km 2.7, 08907 L'Hospitalet, Barcelona, Spain
| | - A B M M K Islam
- Department of Genetic Engineering & Biotechnology, University of Dhaka, Dhaka, Bangladesh
| | - N Vega-García
- Department of Hematology, Hospital Sant Joan de Déu, Barcelona, Spain
| | - R Malatesta
- Department of Hematology, Hospital Sant Joan de Déu, Barcelona, Spain
| | - M Camós
- Department of Hematology, Hospital Sant Joan de Déu, Barcelona, Spain
| | - A Gómez
- Cancer Epigenetics Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - L Román-González
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - A Vidal
- Department of Pathology, University Hospital of Bellvitge, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - N López-Bigas
- 1] Research Unit on Biomedical Informatics, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Dr Aiguader 88, 08003 Barcelona, Spain [2] Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - A Villanueva
- Translational Research Laboratory, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute, Barcelona, Spain
| | - M Esteller
- 1] Cancer Epigenetics Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain [2] Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain [3] Department of Physiological Sciences II, School of Medicine, University of Barcelona, Barcelona, Spain
| | - M Parra
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
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Ferri D, Barba-Bon A, Costero AM, Gaviña P, Parra M, Gil S. An Au(iii)–amino alcohol complex for degradation of organophosphorus pesticides. RSC Adv 2015. [DOI: 10.1039/c5ra20645f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
A gold(iii)–amino alcohol complex induces the P–S bond cleavage in organophosphorous pesticides giving rise to less toxic compounds.
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Affiliation(s)
- D. Ferri
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
| | - A. Barba-Bon
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - A. M. Costero
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - P. Gaviña
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - M. Parra
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - S. Gil
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
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Parra M, Villouta S, Vera V, Belmar J, Zúñiga C, Zunza H. Synthesis and Mesomorphic Properties of Azo Compounds Derived from Phenyl-and Thienyl-1,3,4-Thiadiazole. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1997-1215] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The synthesis and mesomorphic behaviour of new series of liquid crystals containing 1,3,4- thiadiazole and thiophene rings with azo central bond are reported (series 5a and 5b). All compounds of series 5a exhibit enantiotropic nematic mesophase and the higher homologues (n = 9 - 10) also show a monotropic smectic C phase. Series 5b show dimorphism SC - N (for n = 5 - 7 the SC is monotropic). These series are compared with the Schiff’s bases analogues, the imine bond gives rise to similar liquid crystals phase but larger mesomorphic range.
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Affiliation(s)
- M. Parra
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - Sh. Villouta
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - V. Vera
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - J. Belmar
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - C. Zúñiga
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - H. Zunza
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
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Aguilera C, Parra M, Fuentes G. Synthesis and Mesomorphic Properties of Polymethylene-α,ω–bis [2-thio- 5-(4',4"n-alcoxybenzoyIoxy)phenyl]-1,3,4-oxadiazole. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1998-0316] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Three homologous series of polymethylene-α,ω-bis[2-thio-5(4′,4″n-alkoxybenzoyloxy)- phenyl]-1,3,4-oxadiazole (series 5 a, b, c), are reported.The compounds have identical mesogenic units at both ends of a spacer (i.e. they are twins). These twins possess a spacer of 6, 8 and 10 carbon atoms joined directly to the oxadiazole ring through sulphur atoms. The lateral alkylic chains vary between 6 and 10 carbon atoms.The presence of enantiotropic and monotropic nematic phase is related to the length of the spacer group. The influence of molecular structure on the mesomorphic properties has been studied. Mesomorphic properties and phase transitions have been determined using polarizing hot-stage microscopy and differential scanning calorimetry.
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Affiliation(s)
- C. Aguilera
- Departamento de Polímeros, Departamento de Qufmica Orgänica, Facultad de Ciencias Qmmicas,Universidad de Concepcion, Casilla 3-C, Concepcion, Chile
| | - M. Parra
- Departamento de Qufmica Orgänica, Facultad de Ciencias Qmmicas,Universidad de Concepcion, Casilla 3-C, Concepcion, Chile
| | - G. Fuentes
- Departamento de Qufmica Orgänica, Facultad de Ciencias Qmmicas,Universidad de Concepcion, Casilla 3-C, Concepcion, Chile
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Belmar J, Ortiz L, Quezada J, Parra M, Jiménez CA. Synthesis and Characterization of Phenylene-bis-pyrazolones and Nitrosation Derivatives. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- J. Belmar
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - L. Ortiz
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - J. Quezada
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - M. Parra
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - C. A. Jiménez
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
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Gandomi SK, Parra M, Reeves D, Yap V, Gau CL. Array-CGH is an effective first-tier diagnostic test for EFTUD2-associated congenital mandibulofacial dysostosis with microcephaly. Clin Genet 2013; 87:80-4. [PMID: 24266672 DOI: 10.1111/cge.12328] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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: 09/13/2013] [Revised: 11/15/2013] [Accepted: 11/21/2013] [Indexed: 12/19/2022]
Abstract
Mandibulofacial dysostosis with microcephaly (MFDM) is a sporadic malformation syndrome with severe craniofacial abnormalities, microcephaly, developmental delay, and dysmorphic features. Most cases of clinically diagnosed MFDM remain genetically unexplained, and to the best of our knowledge a total of 35 patients, 31 different mutations, 4 deletions, and 6 reports have been published. Our proband was born at 36 weeks gestation with microcephaly, microcrania, cleft palate, severe retrognathia, oral and pharyngeal dysphagia, bilateral proximal radioulnar synostosis, 11 thoracic ribs, abnormal magnetic resonance imaging (MRI) findings including simplified gyral pattern and mild dilatation of the posterior bodies of the lateral ventricles secondary to thinning of the white matter, high-pitched cry due to unilateral vocal cord paralysis, and dysmorphic features. Array comparative genomic hybridization (aCGH) + single nucleotide polymorphism (SNP) analysis identified a likely de novo pathogenic deletion on chromosome 17q21.31, encompassing the EFTUD2 gene. Our case represents the fifth reported proband to have MFDM caused by small deletions involving EFTUD2. All known mutations involving EFTUD2 result in genetic haploinsufficiency, consistent with our proband's case as well. Her phenotypic features both overlap and expand on the clinical features of previously reported cases, and her genetic diagnosis also supports the use of aCGH as a first-tier testing option for this disorder.
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Affiliation(s)
- S K Gandomi
- Department of Clinical Diagnostics and Genetic Counseling, Ambry Genetics, Aliso Viejo, CA, USA
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Gandomi SK, Farwell Gonzalez KD, Parra M, Shahmirzadi L, Mancuso J, Pichurin P, Temme R, Dugan S, Zeng W, Tang S. Diagnostic exome sequencing identifies two novel IQSEC2 mutations associated with X-linked intellectual disability with seizures: implications for genetic counseling and clinical diagnosis. J Genet Couns 2013; 23:289-98. [PMID: 24306141 DOI: 10.1007/s10897-013-9671-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 11/04/2013] [Indexed: 10/26/2022]
Abstract
Intellectual disability is a heterogeneous disorder with a wide phenotypic spectrum. Over 1,700 OMIM genes have been associated with this condition, many of which reside on the X-chromosome. The IQSEC2 gene is located on chromosome Xp11.22 and is known to play a significant role in the maintenance and homeostasis of the brain. Mutations in IQSEC2 have been historically associated with nonsyndromic X-linked intellectual disability. Case reports of affected probands show phenotypic overlap with conditions associated with pathogenic MECP2, FOXG1, CDKL5, and MEF2C gene mutations. Affected individuals, however, have also been identified as presenting with additional clinical features including seizures, autistic-behavior, psychiatric problems, and delayed language skills. To our knowledge, only 5 deleterious mutations and 2 intragenic duplications have been previously reported in IQSEC2. Here we report two novel IQSEC2 de novo truncating mutations identified through diagnostic exome sequencing in two severely affected unrelated male probands manifesting developmental delay, seizures, hypotonia, plagiocephaly, and abnormal MRI findings. Overall, diagnostic exome sequencing established a molecular diagnosis for two patients in whom traditional testing methods were uninformative while expanding on the mutational and phenotypic spectrum. In addition, our data suggests that IQSEC2 may be more common than previously appreciated, accounting for approximately 9 % (2/22) of positive findings among patients with seizures referred for diagnostic exome sequencing. Further, these data supports recently published data suggesting that IQSEC2 plays a more significant role in the development of X-linked intellectual disability with seizures than previously anticipated.
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Affiliation(s)
- Stephanie K Gandomi
- Department of Clinical Genomics, Ambry Genetics, 15 Argonaut, Aliso Viejo, CA, 92656, USA,
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Honorato M, Fernandez C, Winkler C, Levancini M, Parra M, Troncoso F. M097 FACTORS ASSOCIATED WITH LOW QUALITY OF LIFE IN CLIMACTERIC WOMEN. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61292-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Parra M. I289 IMPACT OF MENOPAUSE ON WOMEN'S HEALTH: A SURVEY FROM DIFFERENT AREAS OF THE WORLD - CHILE. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)60319-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hill G, Gorman M, Simon S, Frawley L, Whitten K, Wanner L, Parra M, Luce S, Lane L. Effectiveness of Oral Nutritional Supplement Use on Nutritional Status of Community-Dwelling Elderly Receiving Home-Delivered Meals. J Acad Nutr Diet 2012. [DOI: 10.1016/j.jand.2012.06.349] [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: 10/28/2022]
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Garrido Puchalt N, Garcia-Velasco JA, Rivera R, Remohi J, Pellicer A, Simoes T, Pinto S, Marques C, Correia S, Pinto G, Figueiredo S, Santillan I, Verdu V, Parra M, Bajo JM, Macedo J, Coca S, Freour T, Dessolle L, Lammers J, Lattes S, Mansour W, Mirallie S, Jean M, Barriere P, Polyzos NP, Blockeel C, Verpoest W, De Vos M, Stoop D, Vloeberghs V, Camus M, Devroey P, Tournaye H. SESSION 20: FEMALE INFERTILITY 2. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.20] [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: 11/13/2022] Open
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Abalos T, Jiménez D, Moragues M, Royo S, Martínez-Máñez R, Sancenón F, Soto J, Costero AM, Parra M, Gil S. Multi-channel receptors based on thiopyrylium functionalised with macrocyclic receptors for the recognition of transition metal cations and anions. Dalton Trans 2010; 39:3449-59. [PMID: 20333335 DOI: 10.1039/b921486k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We report herein the synthesis and characterization of a family of ligands containing different cation binding sites covalently connected to a thiopyrylium signalling reporter. The receptors L1-L6 are able to signal the presence of certain metal cations via three different channels; i.e. electrochemically, fluorogenically and chromogenically. An acetonitrile solution of L1-L6 shows a bright blue colour due to a charge-transfer band in the 575-585 nm region. The colour variation in acetonitrile of L1-L6 in the presence of the metal cations Ag+, Cd2+, Cu2+, Fe3+, Hg2+, Ni2+, Pb2+ and Zn2+ has been studied. A selective hypsochromic shift of the blue band was found for the systems L4-Pb2+ and L5-Hg2+. Additionally, L1-L6 are poorly fluorescent but coordination with certain metal cations induces an enhancement of the fluorescence at ca 500 nm. For instance, the presence of Cu2+ and Fe3+ induced a remarkable 42-fold and 45-fold enhancement in the emission intensity of L1 centred at 500 nm, respectively. Also remarkable was the 18-fold enhancement observed for L4 and L5 in the presence of Fe3+ and Cu2+, respectively. The electrochemical behaviour of receptors L1-L6 was studied in acetonitrile using platinum as a working electrode and [Bu4N][BF4] as a supporting electrolyte. This family of receptors showed a one-electron reversible redox process at ca. -0.46 V versus sce attributed to the reduction of the thiopyrylium group. A moderate anodic shift in the presence of certain metal cations was observed. The effect in the UV-visible spectra of acetonitrile solutions of receptor L1-L6 in the presence of anions was also studied. A remarkable bleaching was found in the presence of cyanide.
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Affiliation(s)
- T Abalos
- Instituto de Reconocimiento Molecular y Desarrollo Tecnológico, Centro Mixto Universidad Politécnica de Valencia-Universidad de Valencia, Valencia, Spain
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Cáceres L, Vargas T, Parra M. Study of the variational patterns for corrosion kinetics of carbon steel as a function of dissolved oxygen and NaCl concentration. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.07.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Illanes S, Parra M, Serra R, Pino K, Figueroa-Diesel H, Romero C, Arraztoa JA, Michea L, Soothill PW. Increased free fetal DNA levels in early pregnancy plasma of women who subsequently develop preeclampsia and intrauterine growth restriction. Prenat Diagn 2009; 29:1118-22. [DOI: 10.1002/pd.2372] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jasinska A, Service S, Jawaheer D, DeYoung J, Levinson M, Zhang Z, Kremeyer B, Muller H, Aldana I, Garcia J, Restrepo G, Lopez C, Palacio C, Duque C, Parra M, Vega J, Ortiz D, Bedoya G, Mathews C, Davanzo P, Fournier E, Bejarano J, Ramirez M, Ortiz CA, Araya X, Molina J, Sabatti C, Reus V, Ospina J, Macaya G, Ruiz-Linares A, Freimer N. A narrow and highly significant linkage signal for severe bipolar disorder in the chromosome 5q33 region in Latin American pedigrees. Am J Med Genet B Neuropsychiatr Genet 2009; 150B:998-1006. [PMID: 19319892 PMCID: PMC4815924 DOI: 10.1002/ajmg.b.30956] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We previously reported linkage of bipolar disorder to 5q33-q34 in families from two closely related population isolates, the Central Valley of Costa Rica (CVCR) and Antioquia, Colombia (CO). Here we present follow up results from fine-scale mapping in large CVCR and CO families segregating severe bipolar disorder, BP-I, and in 343 population trios/duos from CVCR and CO. Employing densely spaced SNPs to fine map the prior linkage peak region increases linkage evidence and clarifies the position of the putative BP-I locus. We performed two-point linkage analysis with 1134 SNPs in an approximately 9 Mb region between markers D5S410 and D5S422. Combining pedigrees from CVCR and CO yields a LOD score of 4.9 at SNP rs10035961. Two other SNPs (rs7721142 and rs1422795) within the same 94 kb region also displayed LOD scores greater than 4. This linkage peak coincides with our prior microsatellite results and suggests a narrowed BP-I susceptibility regions in these families. To investigate if the locus implicated in the familial form of BP-I also contributes to disease risk in the population, we followed up the family results with association analysis in duo and trio samples, obtaining signals within 2 Mb of the peak linkage signal in the pedigrees; rs12523547 and rs267015 (P = 0.00004 and 0.00016, respectively) in the CO sample and rs244960 in the CVCR sample and the combined sample, with P = 0.00032 and 0.00016, respectively. It remains unclear whether these association results reflect the same locus contributing to BP susceptibility within the extended pedigrees.
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Affiliation(s)
- A.J. Jasinska
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - S. Service
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - D. Jawaheer
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - J. DeYoung
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - M. Levinson
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - Z. Zhang
- Department of Statistics, University of California, Los Angeles, California
| | - B. Kremeyer
- Galton Laboratory, Department of Biology, University College London, London, United Kingdom
| | - H. Muller
- Galton Laboratory, Department of Biology, University College London, London, United Kingdom
| | - I. Aldana
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - J. Garcia
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - G. Restrepo
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Lopez
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Palacio
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Duque
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - M. Parra
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - J. Vega
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - D. Ortiz
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - G. Bedoya
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Mathews
- Department of Psychiatry, University of California, San Francisco, California
| | - P. Davanzo
- Department of Psychiatry and Behavioral Sciences, School of Medicine, University of California, Los Angeles, California
| | - E. Fournier
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - J. Bejarano
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - M. Ramirez
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - C. Araya Ortiz
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - X. Araya
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - J. Molina
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - C. Sabatti
- Department of Statistics, University of California, Los Angeles, California,Department of Statistics and Department of Human Genetics, University of California, Los Angeles, California
| | - V. Reus
- Department of Psychiatry, University of California, San Francisco, California
| | - J. Ospina
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - G. Macaya
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - A. Ruiz-Linares
- Galton Laboratory, Department of Biology, University College London, London, United Kingdom
| | - N.B. Freimer
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California,Correspondence to: N.B. Freimer, UCLA Center for Neurobehavioral Genetics, Gonda Center, Rm. 3506, 695 Charles E. Young Dr S., Box 951761, Los Angeles, CA 90095.
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Parra M, Martínez-Ruíz J, Tomás V, Martínez-Gutiérrez R, García-Cánovas F, Tudela J. Optimization of the soybean peroxidase catalysed biodegradation of 2,4,6-trichlorophenol. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.514] [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: 11/15/2022]
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Martinez-Ruiz J, Parra M, Tomás V, Martinez-Gutiérrez R, García-Canovas F, Tudela J. Biodegradation of 2,4,6-trichlorophenol catalysed by the methylsyringate–laccase mediator system. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jiménez L, Parra M, Tomás V, Martinez-Gutiérrez R, García-Cánovas F, Tudela J. Indigo carmine biodegradation catalysed by soybean peroxidase. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wilson JW, Ott CM, zu Bentrup KH, Ramamurthy R, Quick L, Porwollik S, Cheng P, McClelland M, Tsaprailis G, Radabaugh T, Hunt A, Fernandez D, Richter E, Shah M, Kilcoyne M, Joshi L, Nelman-Gonzalez M, Hing S, Parra M, Dumars P, Norwood K, Bober R, Devich J, Ruggles A, Goulart C, Rupert M, Stodieck L, Stafford P, Catella L, Schurr MJ, Buchanan K, Morici L, McCracken J, Allen P, Baker-Coleman C, Hammond T, Vogel J, Nelson R, Pierson DL, Stefanyshyn-Piper HM, Nickerson CA. Space flight alters bacterial gene expression and virulence and reveals a role for global regulator Hfq. Proc Natl Acad Sci U S A 2007; 104:16299-304. [PMID: 17901201 PMCID: PMC2042201 DOI: 10.1073/pnas.0707155104] [Citation(s) in RCA: 276] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A comprehensive analysis of both the molecular genetic and phenotypic responses of any organism to the space flight environment has never been accomplished because of significant technological and logistical hurdles. Moreover, the effects of space flight on microbial pathogenicity and associated infectious disease risks have not been studied. The bacterial pathogen Salmonella typhimurium was grown aboard Space Shuttle mission STS-115 and compared with identical ground control cultures. Global microarray and proteomic analyses revealed that 167 transcripts and 73 proteins changed expression with the conserved RNA-binding protein Hfq identified as a likely global regulator involved in the response to this environment. Hfq involvement was confirmed with a ground-based microgravity culture model. Space flight samples exhibited enhanced virulence in a murine infection model and extracellular matrix accumulation consistent with a biofilm. Strategies to target Hfq and related regulators could potentially decrease infectious disease risks during space flight missions and provide novel therapeutic options on Earth.
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Affiliation(s)
- J. W. Wilson
- Center for Infectious Diseases and Vaccinology
- Tulane University Health Sciences Center, New Orleans, LA 70112
| | - C. M. Ott
- Habitability and Environmental Factors Division and
| | | | - R. Ramamurthy
- Tulane University Health Sciences Center, New Orleans, LA 70112
| | - L. Quick
- Center for Infectious Diseases and Vaccinology
| | - S. Porwollik
- Sidney Kimmel Cancer Center, San Diego, CA 92121
| | - P. Cheng
- Sidney Kimmel Cancer Center, San Diego, CA 92121
| | | | - G. Tsaprailis
- Center for Toxicology, University of Arizona, Tucson, AZ 85721
| | - T. Radabaugh
- Center for Toxicology, University of Arizona, Tucson, AZ 85721
| | - A. Hunt
- Center for Toxicology, University of Arizona, Tucson, AZ 85721
| | | | - E. Richter
- Center for Infectious Diseases and Vaccinology
| | - M. Shah
- Center for Glycoscience Technology
| | | | - L. Joshi
- Center for Glycoscience Technology
| | | | - S. Hing
- Ames Research Center, National Aeronautics and Space Administration, Moffett Field, CA 94035
| | - M. Parra
- Ames Research Center, National Aeronautics and Space Administration, Moffett Field, CA 94035
| | - P. Dumars
- Ames Research Center, National Aeronautics and Space Administration, Moffett Field, CA 94035
| | - K. Norwood
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - R. Bober
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - J. Devich
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - A. Ruggles
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - C. Goulart
- BioServe, University of Colorado, Boulder, CO 80309
| | - M. Rupert
- BioServe, University of Colorado, Boulder, CO 80309
| | - L. Stodieck
- BioServe, University of Colorado, Boulder, CO 80309
| | | | - L. Catella
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - M. J. Schurr
- Tulane University Health Sciences Center, New Orleans, LA 70112
- University of Colorado at Denver and Health Sciences Center, Denver, CO 80262
| | - K. Buchanan
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Oklahoma City University, Oklahoma City, OK 73106
| | - L. Morici
- Tulane University Health Sciences Center, New Orleans, LA 70112
| | - J. McCracken
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Section of General Surgery, University of Chicago, Chicago, IL 60637
| | - P. Allen
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Southeast Louisiana Veterans Health Care System, New Orleans, LA 70112; and
| | - C. Baker-Coleman
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Southeast Louisiana Veterans Health Care System, New Orleans, LA 70112; and
| | - T. Hammond
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Southeast Louisiana Veterans Health Care System, New Orleans, LA 70112; and
| | - J. Vogel
- RNA Biology Group, Max Planck Institute for Infection Biology, 10117 Berlin, Germany
| | - R. Nelson
- Center for Combinatorial Sciences, The Biodesign Institute, Arizona State University, Tempe, AZ 85287
| | | | - H. M. Stefanyshyn-Piper
- Astronaut Office, Johnson Space Center, National Aeronautics and Space Administration, Houston, TX 77058
| | - C. A. Nickerson
- Center for Infectious Diseases and Vaccinology
- Tulane University Health Sciences Center, New Orleans, LA 70112
- To whom correspondence should be addressed at:
The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, 1001 South McAllister Avenue, Tempe, AZ 85287. E-mail:
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Bosco C, Parra M, Barja P, Rodrigo R, Fernández V, Suarez M, Muñoz H. Increased immunohistochemical expression of thrombomodulin at placental perivascular myofibroblast in severe preeclampsia (PE). Histol Histopathol 2006; 20:1045-55. [PMID: 16136486 DOI: 10.14670/hh-20.1045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The presence of pro-coagulant and anti-coagulant components of the placental vascular endothelium and syncytiotrophoblast are essential for homeostasis. Vascular endothelium prevents blood clot formation in vivo by involving a cell surface thrombin-binding glycoprotein, thrombomodulin (TM), that activates plasma anti-coagulant protein C. The TM levels increase during pregnancy, but the fibrinolytic capacity diminishes. Since vascular lesions with placental coagulation disorders can be associated with preeclampsia (PE), we hypothesized that TM expression in the stem villous vasculature and syncytiotrophoblast of the placenta are impaired in PE. Plasma and placental tissue samples were collected from PE (n=12) and normotensive pregnant patients (n=11). Patient's gestational age was 35.7+/-1.2 (normotensive) and 30.6+/-1.5 weeks (PE). Blood samples were drawn 30 min before delivery. Serum PAI-1 and PAI-2 antigens were determined by enzyme-linked immunoabsorbent assay (ELISA). A monoclonal antibody specific for TM was used for immunohistochemical tissue staining (ABC) and the staining was quantified by semi quantitative scores. Results show no intensity differences at the apical syncytiotrophoblast between the two groups. However, in preeclamptic placenta, TM expression diminished in the endothelium of the stem villi arteries and increased in the perivascular and stromal myofibroblats in cases of severe PE. TM changes were associated with an increased PAI-1/PAI-2 ratio. It is suggested that in severe PE, the decreased placental blood flow may be due to structural and functional impairment of the endothelium of the stem villi vessels and the surrounding perivascular and stromal myofibroblast, by increasing TM expression which may modulate fetal blow flow in the villous tree.
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Affiliation(s)
- C Bosco
- Anatomy and Development Biology Program, Molecular and Clinical Pharmacology Program and Pathology Program, ICBM Faculty of Medicine, University of Chile, Santiago.
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Vargas-Dĭaz J, Garófalo-Gómez N, Rodríguez U, Parra M, Barroso-García E, Novoa-López L, Rojas-Massipe E, Sardiñas-Hernández NL. [Mondini dysplasia: recurrent bacterial meningitis in adolescence]. Rev Neurol 2004; 39:935-9. [PMID: 15573310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
INTRODUCTION Episodes of recurrent bacterial meningitis can occur in patients due to either congenital or acquired disorders. Congenital deformity of the bony labyrinth can be linked to a fistulous tract communicating it with the intracranial subarachnoid space. Mondini deformity is a frequent malformation in congenitally deaf patients. CASE REPORT We report the case of an adolescent with a history of being unable to hear in one ear who, from the age of 10 years, began to suffer repeated bacterial meningoencephalitis with microbiological recovery of Streptococcus pneumoniae on three occasions. The type of germ recovered in the cerebrospinal fluid (CSF) and the history of congenital deafness that was detected when the patient was 3 years old were the diagnostic clues to the possible anomaly of the inner ear with a CSF fistula. The clinically proven CSF rhinorrhea contributed to the diagnosis of an ear anomaly with a fistula. Computerised axial tomography and magnetic resonance studies of the petrous portion of the temporal bone revealed the malformation that was later found and closed during the surgical intervention on the affected ear. The clinical absence of rhinorrhea, a year's progression without new infections after operating on the patient and post-surgery imaging studies were all proof that the fistula had closed. CONCLUSIONS Mondini dysplasia with CSF fistula must be included as a possible diagnosis when faced with a patient with recurrent bacterial meningoencephalitis. Imaging studies, especially magnetic resonance, enable the clinician to check the diagnosis and the CSF fistula can be closed with ear surgery.
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Affiliation(s)
- J Vargas-Dĭaz
- Instituto de Neurología y Neurocirugía, Ciudad de La Habana, Cuba.
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Carbonell F, Galán L, Valdés P, Worsley K, Biscay RJ, Díaz-Comas L, Bobes MA, Parra M. Random field-union intersection tests for EEG/MEG imaging. Neuroimage 2004; 22:268-76. [PMID: 15110017 DOI: 10.1016/j.neuroimage.2004.01.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2003] [Revised: 01/15/2004] [Accepted: 01/15/2004] [Indexed: 11/21/2022] Open
Abstract
Electrophysiological (EEG/MEG) imaging challenges statistics by providing two views of the same spatiotemporal data: topographic and tomographic. Until now, statistical tests for these two situations have developed separately. This work introduces statistical tests for assessing simultaneously the significance of spatiotemporal event-related potential/event-related field (ERP/ERF) components and that of their sources. The test for detecting a component at a given time instant is provided by a Hotelling's T(2) statistic. This statistic is constructed in such a manner to be invariant to any choice of reference and is based upon a generalized version of the average reference transform of the data. As a consequence, the proposed test is a generalization of the well-known Global Field Power statistic. Consideration of tests at all time instants leads to a multiple comparison problem addressed by the use of Random Field Theory (RFT). The Union-Intersection (UI) principle is the basis for testing hypotheses about the topographic and tomographic distributions of such ERP/ERF components. The performance of the method is illustrated with actual EEG recordings obtained from a visual experiment of pattern reversal stimuli.
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Affiliation(s)
- F Carbonell
- Departamento de Sistemas Adaptivos, Institute for Cybernetics, Mathematics and Physics, Calle 15, No. 551, e/C y D, Vedado, Havana 4, C.P. 10400, Cuba.
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Vargas Díaz J, Garófalo Gómez N, Rodríguez U, Parra M, Barroso García E, Novoa López L, Rojas Massipe E, Sardiñas Hernández NL. Displasia de Mondini: meningitis bacteriana recurrente en la adolescencia. Rev Neurol 2004. [DOI: 10.33588/rn.3910.2004155] [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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Yu CKH, Papageorghiou AT, Parra M, Palma Dias R, Nicolaides KH. Randomized controlled trial using low-dose aspirin in the prevention of pre-eclampsia in women with abnormal uterine artery Doppler at 23 weeks' gestation. Ultrasound Obstet Gynecol 2003; 22:233-239. [PMID: 12942493 DOI: 10.1002/uog.218] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE Pre-eclampsia, which is a major cause of perinatal and maternal morbidity and mortality, is thought to be due to impaired perfusion of the placenta. There is contradictory evidence that the administration of low-dose aspirin may provide effective prophylaxis against the subsequent development of pre-eclampsia. In this study we tested the hypothesis that in women identified as being at high-risk for pre-eclampsia, because of impaired flow in the uterine arteries, the prophylactic use of low-dose aspirin from 23 weeks of gestation can reduce the incidence of pre-eclampsia. METHODS We used color and pulsed Doppler to measure the flow in the uterine arteries in 19,950 singleton pregnancies at 22-24 weeks of gestation. Those women exhibiting increased impedance were recruited into a randomized study of aspirin 150 mg per day or placebo. We compared the two groups for the incidence of pre-eclampsia and the other consequences of impaired placentation. RESULTS The screening study identified 844 women (4.2%) as being at high risk of uteroplacental insufficiency. After exclusion and refusal, 560 women were randomly allocated to aspirin 150 mg or placebo per day until 36 weeks' gestation. There were no significant differences between the aspirin and placebo groups in either the incidence of pre-eclampsia (18% vs. 19%, P = 0.6) or pre-eclampsia requiring delivery below 34 weeks (6% vs. 8%, P = 0.36). Furthermore, the administration of aspirin did not significantly alter the incidence of preterm delivery (24% vs. 27%, P = 0.46), birth weight below the 5th centile (22% vs. 24%, P = 0.4), perinatal death (3% vs. 1%, P = 0.33) or placental abruption (4% vs. 2%, P = 0.12). CONCLUSION In pregnancies with impaired placentation, as demonstrated by increased impedance to flow in the uterine arteries, the daily administration of 150 mg aspirin after 23 weeks of gestation does not prevent the subsequent development of pre-eclampsia.
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Affiliation(s)
- C K H Yu
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital Medical School, London, UK
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Albaiges G, Missfelder-Lobos H, Parra M, Lees C, Cooper D, Nicolaides KH. Comparison of color Doppler uterine artery indices in a population at high risk for adverse outcome at 24 weeks' gestation. Ultrasound Obstet Gynecol 2003; 21:170-173. [PMID: 12601841 DOI: 10.1002/uog.30] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To compare uterine artery Doppler velocity and impedance indices in the presence and absence of uterine artery waveform notches, in the prediction of adverse pregnancy outcome in high-risk women. METHODS One hundred and fifty-seven women identified at Doppler screening as being at 'high risk' underwent a further uterine artery Doppler assessment at 24 weeks' gestation. Pulsatility and resistance indices and minimum, time averaged and time averaged maximum velocities were measured, and the presence of bilateral notches noted. Adverse outcomes were pre-eclampsia, birth weight less than the tenth centile, placental abruption and intrauterine death. The best cut-off for each parameter was assessed by univariate logistic regression, and the comparative performance of the screening parameters was assessed using kappa values. RESULTS The best performing index in the presence of bilateral notches was mean resistance index, for a cut-off of 0.67, giving a kappa value of 0.65. Mean pulsatility index and lowest pulsatility index performed similarly well, both with kappa values of 0.58. All velocity indices apart from lowest minimum velocity had kappa values of < 0.4. When indices were analyzed, irrespective of notch status, mean resistance and mean pulsatility indices performed similarly, with kappa values of 0.49 and 0.46, respectively; mean minimum velocity had a kappa value of 0.4. CONCLUSIONS In a high-risk population, uterine artery Doppler mean resistance indices perform better than do velocity indices in the prediction of adverse pregnancy outcome, irrespective of notch status.
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Affiliation(s)
- G Albaiges
- Harris Birthright Centre for Fetal Medicine, King's College Hospital, London, UK
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Gimenez C, Diaz E, Rosado F, Garcia-Ferrer A, Sanchez M, Parra M, Díaz M, Peña F. CHARACTERIZATION OF CURRENT MANAGEMENT PRACTICES WITH HIGH RISK OF NITRATE CONTAMINATION IN AGRICULTURAL AREAS OF SOUTHERN SPAIN. ACTA ACUST UNITED AC 2001. [DOI: 10.17660/actahortic.2001.563.8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Parra M, Jardí M, Koziczak M, Nagamine Y, Muñoz-Cánoves P. p53 Phosphorylation at serine 15 is required for transcriptional induction of the plasminogen activator inhibitor-1 (PAI-1) gene by the alkylating agent N-methyl-N'-nitro-N-nitrosoguanidine. J Biol Chem 2001; 276:36303-10. [PMID: 11470783 DOI: 10.1074/jbc.m103735200] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The alkylating agent N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) is a widely spread environmental carcinogen that causes DNA lesions leading to cell killing. MNNG can also induce a cell-protective response by inducing the expression of DNA repair/transcription-related genes. We recently demonstrated that urokinase-type plasminogen activator, an extracellular protease to which no DNA repair functions have been assigned, was induced by MNNG. Here, we show that the physiological inhibitor of urokinase-type plasminogen activator, PAI-1, is also induced by MNNG in a p53-dependent fashion, because MNNG induced PAI-1 in p53-expressing cells but not in p53-/- cells. MNNG induced p53 phosphorylation at serine 15, resulting in stabilization of the p53 protein, and this phosphorylation event was central for p53-dependent PAI-1 transcription. Finally, we showed that PAI-1 transcriptional induction by MNNG required a p53-responsive element located at -136 base pairs in the PAI-1 promoter, because specific mutation of this site abrogated the induction. Because PAI-1 is a prognostic factor in many metastatic cancers, being involved in the control of tumor invasiveness, our finding that a genotoxic agent induces the PAI-1 gene via p53 adds a new feature to the role of the tumor-suppressor p53 protein. Our results also suggest the possibility that genotoxic agents contribute to tumor metastasis by inducing PAI-1 without involving genetic modification.
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Affiliation(s)
- M Parra
- Institut de Recerca Oncologica, Center d'Oncologia Molecular, Aut. Castelldefels, km 2.7, L'Hospitalet Ll., E-08907 Barcelona, Spain
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Lees C, Parra M, Missfelder-Lobos H, Morgans A, Fletcher O, Nicolaides KH. Individualized risk assessment for adverse pregnancy outcome by uterine artery Doppler at 23 weeks. Obstet Gynecol 2001; 98:369-73. [PMID: 11530114 DOI: 10.1016/s0029-7844(01)01474-0] [Citation(s) in RCA: 30] [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] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To provide individualized risk prediction of severe adverse pregnancy outcome based on uterine artery Doppler screening at 23 weeks. METHODS Color Doppler assessment of the uterine arteries was carried out in 5121 women attending for routine care at 23 weeks in two inner-city obstetric units. The mean uterine artery pulsatility index (PI) was calculated, and the likelihood ratios in relation to PI were generated for severe adverse outcome. This was defined as fetal death, placental abruption, and delivery before 34 weeks associated with preeclampsia and birth weight less than the 10th centile. RESULTS The likelihood of severe adverse pregnancy outcome increased quadratically with mean uterine artery PI. This relationship was not affected by maternal age, ethnicity, or parity. At a mean PI of 1.45, the 95th centile for our population, the likelihood ratio for severe adverse pregnancy outcome was 5. Cigarette smoking had an additional contribution to PI in predicting severe adverse outcome, roughly doubling the risk for a given PI. CONCLUSION The individualized risk of severe adverse pregnancy outcome can be determined by uterine artery Doppler screening at 23 weeks and knowledge of cigarette smoking history. Such individualized risk would allow ultrasound resources and clinical follow-up to be tailored to the pregnant woman for the most appropriate use of antenatal care.
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Affiliation(s)
- C Lees
- Harris Birthright Unit, King's College Hospital, London, United Kingdom.
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Lluís F, Roma J, Suelves M, Parra M, Aniorte G, Gallardo E, Illa I, Rodríguez L, Hughes SM, Carmeliet P, Roig M, Muñoz-Cánoves P. Urokinase-dependent plasminogen activation is required for efficient skeletal muscle regeneration in vivo. Blood 2001; 97:1703-11. [PMID: 11238111 DOI: 10.1182/blood.v97.6.1703] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Plasminogen activators urokinase-type plasminogen activator (uPA) and tissue-type plasminogen activator (tPA) are extracellular proteases involved in various tissue remodeling processes. A requirement for uPA activity in skeletal myogenesis was recently demonstrated in vitro. The role of plasminogen activators in skeletal muscle regeneration in vivo in wild-type, uPA-deficient, and tPA-deficient mice is investigated here. Wild-type and tPA-/- mice completely repaired experimentally damaged skeletal muscle. In contrast, uPA-/- mice had a severe regeneration defect, with decreased recruitment of blood-derived monocytes to the site of injury and with persistent myotube degeneration. In addition, uPA-deficient mice accumulated fibrin in the degenerating muscle fibers; however, the defibrinogenation of uPA-deficient mice resulted in a correction of the muscle regeneration defect. A similar severe regeneration deficit with persistent fibrin deposition was also reproducible in plasminogen-deficient mice after injury, suggesting that fibrinolysis by uPA-mediated plasminogen activation plays a fundamental role in skeletal muscle regeneration. In conclusion, the uPA-plasmin system is identified as a critical component of the mammalian skeletal muscle regeneration process, possibly because it prevents intramuscular fibrin accumulation and contributes to the adequate inflammatory response after injury. These studies demonstrate the requirement of an extracellular proteolytic cascade during muscle regeneration in vivo.
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Affiliation(s)
- F Lluís
- Centre d'Oncologia Molecular, Institut de Recerca Oncològica, Barcelona, Spain
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Gil S, Lázaro MA, Parra M, Breitmaier E, Mestres R. γ-Alkylation of Unsaturated Carboxylic Acids. Stereoselective Synthesis of 2Z- and 2E,6E-3-Methyldeca-2,6-dienoic Acids from 3-Methylbut-2-enoic Acid Through Consecutive Ireland Claisen and Cope Rearrangements. Synlett 2000. [DOI: 10.1055/s-1998-1565] [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: 10/23/2022]
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Albaiges G, Missfelder-Lobos H, Lees C, Parra M, Nicolaides KH. One-stage screening for pregnancy complications by color Doppler assessment of the uterine arteries at 23 weeks' gestation. Obstet Gynecol 2000; 96:559-64. [PMID: 11004359 DOI: 10.1016/s0029-7844(00)00946-7] [Citation(s) in RCA: 152] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To estimate the value of screening for preeclampsia and fetal growth restriction by performing color Doppler assessment of uterine arteries at 23 weeks' gestation in predicting adverse pregnancy outcome. METHODS Women with singleton pregnancies who attended routine ultrasonography at 23 weeks had color Doppler uterine artery imaging. Bilateral uterine artery notches were noted and left and right uterine artery pulsatility indices (PI) were measured. A mean PI of more than 1.45 was considered increased. Screening characteristics for predicting preeclampsia and delivery of small-for-gestational-age infants were calculated. RESULTS Of 1757 pregnancies, increased PI was present in 89 (5.1%) and bilateral notches were noted in 77 (4.4%). Twenty-three of 65 women (35.3%; 95% confidence interval [CI] 23.9, 48.2) had increased PI and later developed preeclampsia, and 8 of 10 (80%; 95% CI 44.4, 97. 5) with preeclampsia required delivery before 34 weeks. The respective values for women with bilateral notches were 21 of 65 (32. 3%; 95% CI 21.2, 45.1) and 8 of 10 (80%; 95% CI 44.4, 97.5). The sensitivity of increased PI was 30 of 143 (21%; 95% CI 14.6, 28.6) for delivery of an infant with birth weight below the tenth percentile and 7 of 10 (70% 95% CI 34.8,93.3) for birth weight below the tenth percentile delivered before 34 weeks. The respective values for bilateral notches were 19 of 143 (13.3%; 95% CI 8.2, 20) and 5 of 10 (50%; 95% CI 18.7, 81.3). CONCLUSION A one-stage color Doppler screening program at 23 weeks identified most women who subsequently developed serious complications of impaired placentation associated with delivery before 34 weeks. The screening results were similar when the high-risk group was defined as women with increased PI or bilateral notches.
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Affiliation(s)
- G Albaiges
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, United Kingdom
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40
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Parra M, Lluís F, Miralles F, Caelles C, Muñoz-Cánoves P. The cJun N-terminal kinase (JNK) signaling pathway mediates induction of urokinase-type plasminogen activator (uPA) by the alkylating agent MNNG. Blood 2000; 96:1415-24. [PMID: 10942386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
The monofunctional alkylating agent N-methyl-N-nitro-N-nitrosoguanidine (MNNG) is a widespread environmental carcinogen that causes DNA lesions, leading to cell death. However, MNNG can also trigger a cell-protective response by inducing the expression of DNA repair/transcription-related genes. We demonstrate that the urokinase-type plasminogen activator (uPA) gene product, a broad spectrum extracellular protease to which no DNA repair function has been assigned, is transcriptionally induced by MNNG in C2C12 and NIH3T3 cells. This induction required an AP1-enhancer element located at -2.4 kilobase (kb), because it was abrogated by deletion of this site. MNNG was found to induce the activation of JNK/SAPK and p38 mitogen-activated protein kinases (MAPKs). Accordingly, we attempted to assess the contribution of each of these MNNG-inducible MAPKs to uPA gene induction by this alkylating agent. Coexpression of dominant negative versions of kinases of the JNK pathway, such as catalytically inactive forms of MEKK1, MKK7, and JNKK, and of cytoplasmic JNK-inhibitor JIP-1, as well as treatment of cells with curcumin (which blocks JNK activation by MNNG), inhibited MNNG-induced uPA transcriptional activity. In contrast, neither dominant negative MKK6 nor SB203580, which specifically inhibit p38 MAP kinase activation, abrogated the MNNG-induced effect. Taken together, our results show that the JNK signaling pathway links external MNNG stimulation and AP1-dependent uPA gene expression, providing the first functional dissection of a transcription-coupled signal transduction pathway for MNNG. (Blood. 2000;96:1415-1424)
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Affiliation(s)
- M Parra
- Departament de Oncològia Molecular, Institut de Recerca Oncològica (IRO), Barcelona, Spain
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Nunomura W, Takakuwa Y, Parra M, Conboy J, Mohandas N. Regulation of protein 4.1R, p55, and glycophorin C ternary complex in human erythrocyte membrane. J Biol Chem 2000; 275:24540-6. [PMID: 10831591 DOI: 10.1074/jbc.m002492200] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.1] [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: 12/27/2022] Open
Abstract
Three binary protein-protein interactions, glycophorin C (GPC)-4.1R, GPC-p55, and p55-4.1R, constitute the GPC-4.1R-p55 ternary complex in the erythrocyte membrane. Little is known regarding the molecular basis for the interaction of 4.1R with either GPC or p55 and regarding the role of 4.1R in regulating the various protein-protein interactions that constitute the GPC-4.1R-p55 ternary complex. In the present study, we present evidence that sequences in the 30-kDa domain encoded by exon 8 and exon 10 of 4.1R constitute the binding interfaces for GPC and p55, respectively. We further show that 4.1R increases the affinity of p55 binding to GPC by an order of magnitude, implying that 4.1R modulates the interaction between p55 and GPC. Finally, we document that binding of calmodulin to 4.1R decreases the affinity of 4.1R interactions with both p55 and GPC in a Ca(2+)-dependent manner, implying that the GPC-4.1R-p55 ternary protein complex can undergo dynamic regulation in the erythrocyte membrane. Taken together, these findings have enabled us to identify an important role for 4.1R in regulating the GPC-4.1R-p55 ternary complex in the erythrocyte membrane.
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Affiliation(s)
- W Nunomura
- Department of Biochemistry, School of Medicine, Tokyo Women's Medical University, Shinjuku, Tokyo 162-8666, Japan
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Parra M, Hui G, Johnson AH, Berzofsky JA, Roberts T, Quakyi IA, Taylor DW. Characterization of conserved T- and B-cell epitopes in Plasmodium falciparum major merozoite surface protein 1. Infect Immun 2000; 68:2685-91. [PMID: 10768960 PMCID: PMC97475 DOI: 10.1128/iai.68.5.2685-2691.2000] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Vaccines for P. falciparum will need to contain both T- and B-cell epitopes. Conserved epitopes are the most desirable, but they are often poorly immunogenic. The major merozoite surface protein 1 (MSP-1) is currently a leading vaccine candidate antigen. In this study, six peptides from conserved or partly conserved regions of MSP-1 were evaluated for immunogenicity in B10 congenic mice. Following immunization with the peptides, murine T cells were tested for the ability to proliferate in vitro and antibody responses to MSP-1 were evaluated in vivo. The results showed that one highly conserved sequence (MSP-1#1, VTHESYQELVKKLEALEDAV; located at amino acid positions 20 to 39) and one partly conserved sequence (MSP-1#23, GLFHKEKMILNEEEITTKGA; located at positions 44 to 63) contained both T- and B-cell epitopes. Immunization of mice with these peptides resulted in T-cell proliferation and enhanced production of antibody to MSP-1 upon exposure to merozoites. MSP-1#1 stimulated T-cell responses in three of the six strains of mice evaluated, whereas MSP-1#23 was immunogenic in only one strain. Immunization with the other four peptides resulted in T-cell responses to the peptides, but none of the resulting peptide-specific T cells recognized native MSP-1. These results demonstrate that two sequences located in the N terminus of MSP-1 can induce T- and B-cell responses following immunization in a murine model. Clearly, these sequences merit further consideration for inclusion in a vaccine for malaria.
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Affiliation(s)
- M Parra
- Departments of Biology, Georgetown University, Washington, DC 20057, USA.
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Nunomura W, Takakuwa Y, Parra M, Conboy JG, Mohandas N. Ca(2+)-dependent and Ca(2+)-independent calmodulin binding sites in erythrocyte protein 4.1. Implications for regulation of protein 4.1 interactions with transmembrane proteins. J Biol Chem 2000; 275:6360-7. [PMID: 10692436 DOI: 10.1074/jbc.275.9.6360] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [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: 11/06/2022] Open
Abstract
In vitro protein binding assays identified two distinct calmodulin (CaM) binding sites within the NH(2)-terminal 30-kDa domain of erythrocyte protein 4.1 (4.1R): a Ca(2+)-independent binding site (A(264)KKLWKVCVEHHTFFRL) and a Ca(2+)-dependent binding site (A(181)KKLSMYGVDLHKAKDL). Synthetic peptides corresponding to these sequences bound CaM in vitro; conversely, deletion of these peptides from a 30-kDa construct reduced binding to CaM. Thus, 4.1R is a unique CaM-binding protein in that it has distinct Ca(2+)-dependent and Ca(2+)-independent high affinity CaM binding sites. CaM bound to 4.1R at a stoichiometry of 1:1 both in the presence and absence of Ca(2+), implying that one CaM molecule binds to two distinct sites in the same molecule of 4.1R. Interactions of 4.1R with membrane proteins such as band 3 is regulated by Ca(2+) and CaM. While the intrinsic affinity of the 30-kDa domain for the cytoplasmic tail of erythrocyte membrane band 3 was not altered by elimination of one or both CaM binding sites, the ability of Ca(2+)/CaM to down-regulate 4. 1R-band 3 interaction was abrogated by such deletions. Thus, regulation of protein 4.1 binding to membrane proteins by Ca(2+) and CaM requires binding of CaM to both Ca(2+)-independent and Ca(2+)-dependent sites in protein 4.1.
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Affiliation(s)
- W Nunomura
- Department of Biochemistry, School of Medicine, Tokyo Women's Medical University, Shinjuku, Tokyo 162-8666, Japan
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Pimtanothai N, Parra M, Johnson AH, David CS, Katovich Hurley C. Assessing the binding of four Plasmodium falciparum T helper cell epitopes to HLA-DQ and induction of T-cell responses in HLA-DQ transgenic mice. Infect Immun 2000; 68:1366-73. [PMID: 10678949 PMCID: PMC97290 DOI: 10.1128/iai.68.3.1366-1373.2000] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/20/2022] Open
Abstract
A subunit vaccine for Plasmodium falciparum malaria will need to contain well-defined T helper cell epitopes that induce protective immune responses to the parasite. One major barrier to the use of subunit vaccines is the requirement for T helper cell epitopes to be presented by the HLA class II molecules that are present in the population being vaccinated. Since the majority of malaria studies have focused on HLA-DR, little information on the role of HLA-DQ in the binding and immune response to malarial epitopes is available. This study used an in vitro peptide-binding assay to predict the extent of HLA-DQ binding of four conserved T helper cell epitopes identified from asexual-stage malaria vaccine candidate antigens. Epstein-Barr virus (EBV)-transformed human B-cell lines expressing 14 different DQ molecules (DQ2.1, -2.2, -4.1, -4.2, -5.1 to -5.3, -6.1, -6.2, -6.4, -7.1, -7.3, -8, and -9) representing all broad serological specificities, including common DQ molecules present in populations in areas where malaria is endemic, were used in the binding assay. Moreover, an HLA-DQ transgenic mouse model was employed to evaluate the correlation between the in vitro DQ binding of the peptides and the generation of in vivo immune responses following peptide immunization. This study identified two broad DQ-binding peptides, ABRA#14 and SERA#9. ABRA#14 also induced T-cell proliferation and Th1-associated cytokine production in DQ8(+) transgenic mice. The combination of peptide binding to EBV-transformed cell lines and DQ transgenic mice provides a method for identifying additional T-cell epitopes for inclusion in a vaccine.
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Affiliation(s)
- N Pimtanothai
- Department of Microbiology, Georgetown University, Washington, D.C., USA
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Parra M, Gascard P, Walensky LD, Gimm JA, Blackshaw S, Chan N, Takakuwa Y, Berger T, Lee G, Chasis JA, Snyder SH, Mohandas N, Conboy JG. Molecular and functional characterization of protein 4.1B, a novel member of the protein 4.1 family with high level, focal expression in brain. J Biol Chem 2000; 275:3247-55. [PMID: 10652311 DOI: 10.1074/jbc.275.5.3247] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.4] [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: 11/06/2022] Open
Abstract
Brain-enriched isoforms of skeletal proteins in the spectrin and ankyrin gene families have been described. Here we characterize protein 4.1B, a novel homolog of erythrocyte protein 4.1R that is encoded by a distinct gene. In situ hybridization revealed high level, focal expression of 4.1B mRNA in select neuronal populations within the mouse brain, including Purkinje cells of the cerebellum, pyramidal cells in hippocampal regions CA1-3, thalamic nuclei, and olfactory bulb. Expression was also detected in adrenal gland, kidney, testis, and heart. 4.1B protein exhibits high homology to the membrane binding, spectrin-actin binding, and C-terminal domains of 4.1R, including motifs for interaction with NuMA and FKBP13. cDNA characterization and Western blot analysis revealed multiple spliceoforms of protein 4.1B, with functionally relevant heterogeneity in the spectrin-actin and NuMA binding domains. Regulated alternative splicing events led to expression of unique 4. 1B isoforms in brain and muscle; only the latter possessed a functional spectrin-actin binding domain. By immunofluorescence, 4. 1B was localized specifically at the plasma membrane in regions of cell-cell contact. Together these results indicate that 4.1B transcription is selectively regulated among neuronal populations and that alternative splicing regulates expression of 4.1B isoforms possessing critical functional domains typical of other protein 4.1 family members.
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Affiliation(s)
- M Parra
- Life Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA
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Abstract
OBJECTIVE To estimate the umbilical artery and vein blood volume flow using B-mode and Doppler ultrasound in the second and third trimesters of pregnancy. DESIGN This was a cross-sectional study of 129 singleton, healthy pregnancies at 23-33 weeks' gestation. The umbilical artery and vein cross-sectional area, time-averaged velocity and pulsatility index were measured in a free loop of cord, and the fetal weight was estimated. Ranges for each parameter were obtained; from these the blood flow for the vein and artery was calculated, and the average flow corrected for fetal weight was derived. RESULTS The median time for examination was 6 min. The mean cross-sectional area and time-averaged velocity for both the vein and artery increased linearly with gestation. The umbilical artery flow correlated closely with the average vein flow (r = 0.9, p < 0.001). There was a significant, though poor, inverse correlation between the umbilical artery pulsatility index and the average umbilical flow (r = -0.25, p < 0.05). The average umbilical flow (calculated from the mean of arterial and venous flow), corrected for estimated fetal weight, decreased from 189.2 ml/kg per min at 23 weeks to 176.2 ml/kg per min at 33 weeks' gestation. CONCLUSION The estimates of fetal umbilical flow obtained by this Doppler method are consistent with previously published data. Averaging the arterial and venous flow is theoretically advantageous in reducing the inherent errors in estimating either the arterial or the venous flow. This method of measuring umbilical flow may have clinical potential in assessing fetal health and disease processes.
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Affiliation(s)
- C Lees
- Harris Birthright Research Centre, King's College Hospital, London, UK
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Leke RF, Djokam RR, Mbu R, Leke RJ, Fogako J, Megnekou R, Metenou S, Sama G, Zhou Y, Cadigan T, Parra M, Taylor DW. Detection of the Plasmodium falciparum antigen histidine-rich protein 2 in blood of pregnant women: implications for diagnosing placental malaria. J Clin Microbiol 1999; 37:2992-6. [PMID: 10449488 PMCID: PMC85431 DOI: 10.1128/jcm.37.9.2992-2996.1999] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.4] [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] [Received: 02/09/1999] [Accepted: 06/07/1999] [Indexed: 11/20/2022] Open
Abstract
Pregnant women have an increased susceptibility to infection by Plasmodium falciparum. Parasites may be present in the placenta yet not detectable in peripheral blood smears by routine light microscopy. In order to determine how frequently misdiagnosis occurs, peripheral blood and placental samples were collected from 1,077 Cameroonian women at the time of giving birth and examined for the presence of malarial parasites by using light microscopy. Results showed that 20.1% of the women who had placental malaria were peripheral blood smear negative. Thus, malarial infection was not detected by microscopic examination of peripheral blood smears from approximately one out of five malaria-infected women. Since P. falciparum parasites secrete histidine-rich protein 2 (HRP-2), we sought to determine if detecting HRP-2 in either peripheral plasma or whole blood might be used to diagnose the presence of parasites "hidden" in the placenta. Samples of peripheral plasma from 127 women with different levels of placental malarial infection were assayed by HRP-2-specific enzyme-linked immunosorbent assay. HRP-2 was detected in 88% of the women with placental malaria who tested negative by blood smear. Additionally, whole blood was obtained from 181 women and tested for HRP-2 with a rapid, chromatographic strip test (ICT). The ICT test accurately detected malarial infection in 89.1% of P. falciparum-infected women. Furthermore, 94% of women with malaria were accurately diagnosed by using a combination of microscopy and the ICT test. Thus, detection of HRP-2 in conjunction with microscopy should improve diagnosis of malaria in pregnant women.
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Affiliation(s)
- R F Leke
- Faculty of Medicine and Biomedical Sciences, The Biotechnology Center, University of Yaounde 1, Yaounde, Cameroon
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Walensky LD, Blackshaw S, Liao D, Watkins CC, Weier HU, Parra M, Huganir RL, Conboy JG, Mohandas N, Snyder SH. A novel neuron-enriched homolog of the erythrocyte membrane cytoskeletal protein 4.1. J Neurosci 1999; 19:6457-67. [PMID: 10414974 PMCID: PMC6782826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/1999] [Accepted: 05/13/1999] [Indexed: 02/13/2023] Open
Abstract
We report the molecular cloning and characterization of 4.1N, a novel neuronal homolog of the erythrocyte membrane cytoskeletal protein 4.1 (4.1R). The 879 amino acid protein shares 70, 36, and 46% identity with 4.1R in the defined membrane-binding, spectrin-actin-binding, and C-terminal domains, respectively. 4.1N is expressed in almost all central and peripheral neurons of the body and is detected in embryonic neurons at the earliest stage of postmitotic differentiation. Like 4.1R, 4.1N has multiple splice forms as evidenced by PCR and Western analysis. Whereas the predominant 4.1N isoform identified in brain is approximately 135 kDa, a smaller 100 kDa isoform is enriched in peripheral tissues. Immunohistochemical studies using a polyclonal 4.1N antibody revealed several patterns of neuronal staining, with localizations in the neuronal cell body, dendrites, and axons. In certain neuronal locations, including the granule cell layers of the cerebellum and dentate gyrus, a distinct punctate-staining pattern was observed consistent with a synaptic localization. In primary hippocampal cultures, mouse 4.1N is enriched at the discrete sites of synaptic contact, colocalizing with the postsynaptic density protein of 95 kDa (a postsynaptic marker) and glutamate receptor type 1 (an excitatory postsynaptic marker). By analogy with the roles of 4.1R in red blood cells, 4.1N may function to confer stability and plasticity to the neuronal membrane via interactions with multiple binding partners, including the spectrin-actin-based cytoskeleton, integral membrane channels and receptors, and membrane-associated guanylate kinases.
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Affiliation(s)
- L D Walensky
- Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205, USA
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Miralles F, Ibáñez-Tallon I, Parra M, Crippa M, Blasi F, Besser D, Nagamine Y, Muñoz-Cánoves P. Transcriptional regulation of the murine urokinase-type plasminogen activator gene in skeletal myoblasts. Thromb Haemost 1999; 81:767-74. [PMID: 10365752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
We have previously shown that urokinase-type plasminogen activator (uPA) is highly expressed in murine C2C12 myoblasts and that antibodies against uPA are able to block both myoblast fusion and differentiation. Here we show the characterization of cis-acting elements in the mouse uPA promoter in vitro which are involved in uPA gene expression in C2C 12 myoblast cells. DNase I hypersensitive (HS) site analysis revealed the presence of three HS sites in myoblasts. Deletion analysis of stably transfected uPA-promoter constructs revealed that at least two of the three HS sites accounted for the high transcriptional expression in C2C12 cells. One was located at -2.4 kb and corresponded to a known PEA3/AP1A element and the other one was located at -4.9 kb and contained a CArG box and a CRE element. So far, no regulatory function had been assigned to this CRE/CArG element. Both HS sites alone were able to activate transcription of a heterologous promoter and showed a cooperative effect when placed together. Electrophoretic mobility-shift assays using myoblast nuclear extracts and specific antibodies demonstrated that cJun, JunD and ATF2 bound to the PEA3/AP1A element, whereas the CRE/CArG element bound SRF. Altogether, these results suggest that high uPA expression in myoblasts is dependent on the cooperation of two regulatory sites in the uPA promoter.
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Affiliation(s)
- F Miralles
- Institut de Recerca Oncològica, Barcelona, Spain
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Shi ZT, Afzal V, Coller B, Patel D, Chasis JA, Parra M, Lee G, Paszty C, Stevens M, Walensky L, Peters LL, Mohandas N, Rubin E, Conboy JG. Protein 4.1R-deficient mice are viable but have erythroid membrane skeleton abnormalities. J Clin Invest 1999; 103:331-40. [PMID: 9927493 PMCID: PMC407893 DOI: 10.1172/jci3858] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A diverse family of protein 4.1R isoforms is encoded by a complex gene on human chromosome 1. Although the prototypical 80-kDa 4.1R in mature erythrocytes is a key component of the erythroid membrane skeleton that regulates erythrocyte morphology and mechanical stability, little is known about 4.1R function in nucleated cells. Using gene knockout technology, we have generated mice with complete deficiency of all 4.1R protein isoforms. These 4.1R-null mice were viable, with moderate hemolytic anemia but no gross abnormalities. Erythrocytes from these mice exhibited abnormal morphology, lowered membrane stability, and reduced expression of other skeletal proteins including spectrin and ankyrin, suggesting that loss of 4. 1R compromises membrane skeleton assembly in erythroid progenitors. Platelet morphology and function were essentially normal, indicating that 4.1R deficiency may have less impact on other hematopoietic lineages. Nonerythroid 4.1R expression patterns, viewed using histochemical staining for lacZ reporter activity incorporated into the targeted gene, revealed focal expression in specific neurons in the brain and in select cells of other major organs, challenging the view that 4.1R expression is widespread among nonerythroid cells. The 4.1R knockout mice represent a valuable animal model for exploring 4.1R function in nonerythroid cells and for determining pathophysiological sequelae to 4.1R deficiency.
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Affiliation(s)
- Z T Shi
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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