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Bermúdez-Puga S, Morán-Marcillo G, Espinosa de Los Monteros-Silva N, Naranjo RE, Toscano F, Vizuete K, Torres Arias M, Almeida JR, Proaño-Bolaños C. Inspiration from cruzioseptin-1: membranolytic analogue with improved antibacterial properties. Amino Acids 2023; 55:113-124. [PMID: 36609571 DOI: 10.1007/s00726-022-03209-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 09/25/2022] [Indexed: 01/09/2023]
Abstract
Peptide engineering has gained attraction as a source of new cationicity-enhanced analogues with high potential for the design of next-generation antibiotics. In this context, cruzioseptin-1 (CZS-1), a peptide identified from Cruziohyla calcarifer, is recognized for its antimicrobial potency. However, this amidated-peptide is moderately hemolytic. In order to reduce toxicity and increase antimicrobial potency, 3 peptide analogues based on cruzioseptin-1 were designed and evaluated. [K4K15]CZS-1, an analogue with increased cationicity and reduced hydrophobicity, showed antibacterial, antifungal and antiproliferative properties. In addition, [K4K15]CZS-1 is less hemolytic than CZS-1. The in silico and scanning electron microscopy analysis reveal that [K4K15]CZS-1 induces a membranolytic effect on bacteria. Overall, these results confirm the potential of CZS-1 as source of inspiration for design new selective antimicrobial analogues useful for development of new therapeutic agents.
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Affiliation(s)
- Sebastián Bermúdez-Puga
- Biomolecules Discovery Group, Laboratory of Molecular Biology and Biochemistry, Universidad Regional Amazónica Ikiam, Km 7 ½ Vía Muyuna, Tena, Napo, 150150, Ecuador
| | - Giovanna Morán-Marcillo
- Biomolecules Discovery Group, Laboratory of Molecular Biology and Biochemistry, Universidad Regional Amazónica Ikiam, Km 7 ½ Vía Muyuna, Tena, Napo, 150150, Ecuador
| | - Nina Espinosa de Los Monteros-Silva
- Biomolecules Discovery Group, Laboratory of Molecular Biology and Biochemistry, Universidad Regional Amazónica Ikiam, Km 7 ½ Vía Muyuna, Tena, Napo, 150150, Ecuador
| | - Renato E Naranjo
- Dirección Nacional de Biodiversidad, Ministerio del Ambiente, Agua y Transición Ecológica, Madrid 1159 y Andalucía, Quito, 170525, Ecuador
| | - Fernanda Toscano
- Departamento de Ciencias de la Vida y Agricultura, Laboratorio de Inmunología y Virología, Universidad de las Fuerzas Armadas ESPE, CENCINAT, GISAH Av. Gral. Rumiñahui S/N, P.O. Box 171, -5-231B, Sangolquí, Ecuador
| | - Karla Vizuete
- Center of Nanoscience and Nanotechnology, Universidad de las Fuerzas Armadas ESPE, Sangolquí, 170501, Ecuador
| | - Marbel Torres Arias
- Departamento de Ciencias de la Vida y Agricultura, Laboratorio de Inmunología y Virología, Universidad de las Fuerzas Armadas ESPE, CENCINAT, GISAH Av. Gral. Rumiñahui S/N, P.O. Box 171, -5-231B, Sangolquí, Ecuador
| | - José R Almeida
- Biomolecules Discovery Group, Laboratory of Molecular Biology and Biochemistry, Universidad Regional Amazónica Ikiam, Km 7 ½ Vía Muyuna, Tena, Napo, 150150, Ecuador
| | - Carolina Proaño-Bolaños
- Biomolecules Discovery Group, Laboratory of Molecular Biology and Biochemistry, Universidad Regional Amazónica Ikiam, Km 7 ½ Vía Muyuna, Tena, Napo, 150150, Ecuador.
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2
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Jiménez D, Torres Arias M. Immunouniverse of SARS-CoV-2. Immunol Med 2022; 45:186-224. [PMID: 35502127 DOI: 10.1080/25785826.2022.2066251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
SARS-CoV-2 virus has become a global health problem that has caused millions of deaths worldwide. The infection can present with multiple clinical features ranging from asymptomatic or mildly symptomatic patients to patients with severe or critical illness that can even lead to death. Although the immune system plays an important role in pathogen control, SARS-CoV-2 can drive dysregulation of this response and trigger severe immunopathology. Exploring the mechanisms of the immune response involved in host defense against SARS-CoV-2 allows us to understand its immunopathogenesis and possibly detect features that can be used as potential therapies to eliminate the virus. The main objective of this review on SARS-CoV-2 is to highlight the interaction between the virus and the immune response. We explore the function and action of the immune system, the expression of molecules at the site of infection that cause hyperinflammation and hypercoagulation disorders, the factors leading to the development of pneumonia and subsequent severe acute respiratory distress syndrome which is the leading cause of death in patients with COVID-19.
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Affiliation(s)
- Dennis Jiménez
- Departamento de Ciencias de la Vida y Agricultura, Carrera de Ingeniería en Biotecnología, Universidad de las Fuerzas Armadas ESPE, Sangolquí, Pichincha, Ecuador
| | - Marbel Torres Arias
- Departamento de Ciencias de la Vida y Agricultura, Carrera de Ingeniería en Biotecnología, Universidad de las Fuerzas Armadas ESPE, Sangolquí, Pichincha, Ecuador.,Laboratorio de Inmunología y Virología, CENCINAT, GISAH, Universidad de las Fuerzas Armadas, Sangolquí, Pichincha, Ecuador
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3
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Molina P, Torres Arias M. Herramientas biotecnológicas en el diagnóstico, prevención y tratamiento frente a pandemias. RB 2021. [DOI: 10.21931/rb/2021.06.03.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Las pandemias son consideradas como un problema emergente de salud pública a nivel mundial, las cuales además de caracterizarse por tasas altas de morbilidad y mortalidad, ocasionan conflictos en los aspectos sociales, económicos y políticos. Las herramientas biotecnológicas, por su parte, han ido evolucionando conforme al avance tecnológico-científico, lo que ha permitido optimizar métodos de diagnóstico con alta sensibilidad y especificidad, además de mejorar el desarrollo de productos biológicos para la prevención y terapia de enfermedades. El objetivo de esta revisión es identificar la actualización de las herramientas biotecnológicas en el diagnóstico, tratamiento terapéutico y profiláctico frente a los patógenos causantes de las enfermedades pandémicas a lo largo de la historia, mediante la recopilación de información científica. Con este estudio se logró establecer que las herramientas y productos de origen biotecnológico han constituido un papel fundamental en el control de pandemias a través de la innovación constante que ha permitido alcanzar resultados eficientes tanto en diagnóstico como en el tratamiento.
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Affiliation(s)
- Pamela Molina
- Departamento de Ciencias de la Vida y Agricultura, Carrera de Ingeniería en Biotecnología, Universidad de las Fuerzas Armadas ESPE
| | - Marbel Torres Arias
- Departamento de Ciencias de la Vida y Agricultura, Carrera de Ingeniería en Biotecnología, Universidad de las Fuerzas Armadas ESPE Laboratorio de Inmunología y Virología, CENCINAT, GISAH, Universidad de las Fuerzas Armadas ESPE] Av. General Rumiñahui S/N y Ambato, PO BOX 171-5-231B, Sangolquí, Pichincha, Ecuador
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4
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Toulkeridis T, Seqqat R, Torres Arias M, Salazar-Martinez R, Ortiz-Prado E, Chunga S, Vizuete K, Heredia-R M, Debut A. Volcanic Ash as a Precursor for SARS-CoV-2 Infection Among Susceptible Populations in Ecuador: A Satellite Imaging and Excess Mortality-Based Analysis. Disaster Med Public Health Prep 2021; 16:1-13. [PMID: 34006342 PMCID: PMC8314306 DOI: 10.1017/dmp.2021.154] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/17/2021] [Accepted: 05/02/2021] [Indexed: 12/13/2022]
Abstract
The global coronavirus disease 2019 (COVID-19) pandemic has altered entire nations and their health systems. The greatest impact of the pandemic has been seen among vulnerable populations, such as those with comorbidities like heart diseases, kidney failure, obesity, or those with worse health determinants such as unemployment and poverty. In the current study, we are proposing previous exposure to fine-grained volcanic ashes as a risk factor for developing COVID-19. Based on several previous studies it has been known since the mid 1980s of the past century that volcanic ash is most likely an accelerating factor to suffer from different types of cancer, including lung or thyroid cancer. Our study postulates, that people who are most likely to be infected during a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) widespread wave will be those with comorbidities that are related to previous exposure to volcanic ashes. We have explored 8703 satellite images from the past 21 y of available data from the National Oceanic and Atmospheric Administration (NOAA) database and correlated them with the data from the national institute of health statistics in Ecuador. Additionally, we provide more realistic numbers of fatalities due to the virus based on excess mortality data of 2020-2021, when compared with previous years. This study would be a very first of its kind combining social and spatial distribution of COVID-19 infections and volcanic ash distribution. The results and implications of our study will also help countries to identify such aforementioned vulnerable parts of the society, if the given geodynamic and volcanic settings are similar.
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Affiliation(s)
- Theofilos Toulkeridis
- Universidad de las Fuerzas Armadas ESPE, Sangolquí, Ecuador
- Universidad de Especialidades Turísticas, Quito, Ecuador
| | - Rachid Seqqat
- Universidad de las Fuerzas Armadas ESPE, Sangolquí, Ecuador
| | | | | | - Esteban Ortiz-Prado
- OneHealth Global Research Group, Universidad de las Américas, Quito, Ecuador
| | | | - Karla Vizuete
- Universidad de las Fuerzas Armadas ESPE, Sangolquí, Ecuador
| | - Marco Heredia-R
- Centro de Innovación en Tecnología para el Desarrollo, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - Alexis Debut
- Universidad de las Fuerzas Armadas ESPE, Sangolquí, Ecuador
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Ryffel B, Huang F, Robinet P, Panek C, Couillin I, Erard F, Piotet J, Le Bert M, Mackowiak C, Torres Arias M, Dimier-Poisson I, Zheng SG. Corrigendum: Blockade of IL-33R/ST2 Signaling Attenuates Toxoplasma gondii Ileitis Depending on IL-22 Expression. Front Immunol 2020; 11:592865. [PMID: 33193440 PMCID: PMC7656990 DOI: 10.3389/fimmu.2020.592865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 08/25/2020] [Indexed: 12/03/2022] Open
Affiliation(s)
- Bernhard Ryffel
- Department of Clinical Immunology, Sun Yat-sen University Third Affiliated Hospital, Guangzhou, China.,INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Feng Huang
- Department of Clinical Immunology, Sun Yat-sen University Third Affiliated Hospital, Guangzhou, China
| | - Pauline Robinet
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Corine Panek
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | | | - François Erard
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Julie Piotet
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Marc Le Bert
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | | | - Marbel Torres Arias
- Immunology and Virology Laboratory, Nanoscience and Nanotechnology Center, Universidad de las Fuerzas Armadas, ESPE, Sangolquí, Ecuador
| | | | - Song Guo Zheng
- Department of Internal Medicine, Ohio State College of Medicine, Columbus, OH, United States
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6
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García DA, Mendoza L, Vizuete K, Debut A, Arias MT, Gavilanes A, Terencio T, Ávila E, Jeffryes C, Dahoumane SA. Sugar-Mediated Green Synthesis of Silver Selenide Semiconductor Nanocrystals under Ultrasound Irradiation. Molecules 2020; 25:E5193. [PMID: 33171592 PMCID: PMC7664687 DOI: 10.3390/molecules25215193] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/02/2020] [Accepted: 11/05/2020] [Indexed: 12/27/2022] Open
Abstract
Silver selenide (Ag2Se) is a promising nanomaterial due to its outstanding optoelectronic properties and countless bio-applications. To the best of our knowledge, we report, for the first time, a simple and easy method for the ultrasound-assisted synthesis of Ag2Se nanoparticles (NPs) by mixing aqueous solutions of silver nitrate (AgNO3) and selenous acid (H2SeO3) that act as Ag and Se sources, respectively, in the presence of dissolved fructose and starch that act as reducing and stabilizing agents, respectively. The concentrations of mono- and polysaccharides were screened to determine their effect on the size, shape and colloidal stability of the as-synthesized Ag2Se NPs which, in turn, impact the optical properties of these NPs. The morphology of the as-synthesized Ag2Se NPs was characterized by transmission electron microscopy (TEM) and both α- and β-phases of Ag2Se were determined by X-ray diffraction (XRD). The optical properties of Ag2Se were studied using UV-Vis spectroscopy and its elemental composition was determined non-destructively using scanning electron microscopy-energy-dispersive spectroscopy (SEM-EDS). The biological activity of the Ag2Se NPs was assessed using cytotoxic and bactericidal approaches. Our findings pave the way to the cost-effective, fast and scalable production of valuable Ag2Se NPs that may be utilized in numerous fields.
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Affiliation(s)
- Daniela Armijo García
- School of Biological Sciences and Engineering, Yachay Tech, San Miguel de Urcuquí 100650, Ecuador;
| | - Lupe Mendoza
- School of Biological Sciences and Engineering, Yachay Tech, San Miguel de Urcuquí 100650, Ecuador;
| | - Karla Vizuete
- Center of Nanoscience and Nanotechnology, Universidad de las Fuerzas Armadas ESPE, Sangolquí 171103, Ecuador; (K.V.); (A.D.); (M.T.A.); (A.G.)
| | - Alexis Debut
- Center of Nanoscience and Nanotechnology, Universidad de las Fuerzas Armadas ESPE, Sangolquí 171103, Ecuador; (K.V.); (A.D.); (M.T.A.); (A.G.)
| | - Marbel Torres Arias
- Center of Nanoscience and Nanotechnology, Universidad de las Fuerzas Armadas ESPE, Sangolquí 171103, Ecuador; (K.V.); (A.D.); (M.T.A.); (A.G.)
| | - Alex Gavilanes
- Center of Nanoscience and Nanotechnology, Universidad de las Fuerzas Armadas ESPE, Sangolquí 171103, Ecuador; (K.V.); (A.D.); (M.T.A.); (A.G.)
| | - Thibault Terencio
- School of Chemical Sciences and Engineering, Yachay Tech, San Miguel de Urcuquí 100650, Ecuador; (T.T.); (E.Á.)
| | - Edward Ávila
- School of Chemical Sciences and Engineering, Yachay Tech, San Miguel de Urcuquí 100650, Ecuador; (T.T.); (E.Á.)
| | - Clayton Jeffryes
- Center for Advances in Water and Air Quality & The Dan F. Smith Department of Chemical & Biomolecular Engineering, Lamar University, Beaumont, TX 77710, USA;
| | - Si Amar Dahoumane
- School of Biological Sciences and Engineering, Yachay Tech, San Miguel de Urcuquí 100650, Ecuador;
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7
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Debierre-Grockiego F, Moiré N, Torres Arias M, Dimier-Poisson I. Recent Advances in the Roles of Neutrophils in Toxoplasmosis. Trends Parasitol 2020; 36:956-958. [PMID: 32952059 DOI: 10.1016/j.pt.2020.08.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/25/2020] [Accepted: 08/25/2020] [Indexed: 12/24/2022]
Abstract
Neutrophils are now recognized as major components of the response to Toxoplasma gondii by their contribution to parasite elimination by a number of mechanisms. This article focuses on recent advances in the understanding of the mechanisms of migration, cytokine release, and formation of extracellular traps by neutrophils during toxoplasmosis.
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8
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Ryffel B, Huang F, Robinet P, Panek C, Couillin I, Erard F, Piotet J, Le Bert M, Mackowiak C, Torres Arias M, Dimier-Poisson I, Zheng SG. Blockade of IL-33R/ST2 Signaling Attenuates Toxoplasma gondii Ileitis Depending on IL-22 Expression. Front Immunol 2019; 10:702. [PMID: 31057534 PMCID: PMC6482336 DOI: 10.3389/fimmu.2019.00702] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/14/2019] [Indexed: 12/30/2022] Open
Abstract
Oral T. gondii infection (30 cysts of 76K strain) induces acute lethal ileitis in sensitive C57BL/6 (B6) mice with increased expression of IL-33 and its receptor ST2 in the ileum. Here we show that IL-33 is involved in ileitis, since absence of IL-33R/ST2 attenuated neutrophilic inflammation and Th1 cytokines upon T. gondii infection with enhanced survival. Blockade of ST2 by neutralizing ST2 antibody in B6 mice conferred partial protection, while rmIL-33 aggravated ileitis. Since IL-22 expression further increased in absence of ST2, we blocked IL-22 by neutralizing antibody, which abrogated protection from acute ileitis in ST2 deficient mice. In conclusion, severe lethal ileitis induced by oral T. gondii infection is attenuated by blockade of ST2 signaling and may be mediated in part by endogenous IL-22.
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Affiliation(s)
- Bernhard Ryffel
- Department of Clinical Immunology, Sun Yat-sen University Third Affiliated Hospital, Guangzhou, China
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Feng Huang
- Department of Clinical Immunology, Sun Yat-sen University Third Affiliated Hospital, Guangzhou, China
| | - Pauline Robinet
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Corine Panek
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | | | - François Erard
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Julie Piotet
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | - Marc Le Bert
- INEM UMR 7355 CNRS and University of Orleans, Orléans, France
| | | | - Marbel Torres Arias
- Immunology and Virology Laboratory, Nanoscience and Nanotechnology Center, Universidad de las Fuerzas Armadas, ESPE, Sangolquí, Ecuador
| | | | - Song Guo Zheng
- Department of Internal Medicine, Ohio State College of Medicine, Columbus, OH, United States
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9
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Caza J, Fernández R, Torres Arias M, Muñoz D, Ortiz Tirado J, Manjunatha B, I. Mulla4and Rajesh R. Kundapur S. THE DEVELOPMENT, PURIFICATION AND CHARACTERIZATION OF ANTI- VITELLOGENIN ANTIBODIES RAISED IN HENS (GALLUS GALLUS DOMESTICUS) AGAINST TILAPIA (OREOCHROMIS NILOTICUS) VITELLOGENIN PROTEIN. J microb biotech food sci 2019. [DOI: 10.15414/jmbfs.2019.8.5.1165-1168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
ABSTRACT
This study was conducted to induce, isolate and characterize and determine the role of Vitellogenin (Vtg) which is used as a biomarker of environmental quality and steroidogenesis in oviparous organisms. We have purified Vtg from male adult tilapia scientifically known as Oreochromis niloticus previously treated with estradiol 5 μg/g body weight (BW). By using ion exchange chromatography Vtg was purified from blood plasma yielding 1.13 mg Vtg/ml. Subsequently, Lohmann Brown hens were immunized at a 125 and 100 μg Vtg/ml, including three antigen treatments of booster doses of 75 and 50 μg Vtg/ml, respectively. At day 30 post-immunization, posture eggs were collected, we have successfully optimized the extraction of anti-VtgIgY antibody. The purified anti-VtgIgY was validated with SDS-PAGE, detecting heavy and light chains of 70 kDa and 30 kDa, respectively. Further, we have developed ELISA using anti-VtgIgY. To estimate the Vtg specificity, commercial anti-Vtg antibodies of dorada (Sparusaurata) were used and validated for tilapia by Western Blot. Detection of the Vtg monomer was at a dilution of 1/2000 IgY primary antibody. The antibodies thus obtained through the conventional techniques of production and validation of IgY antibodies for Vtg of tilapia demonstrate that they are viable under local conditions, can be successfully used for programs of environmental monitoring and reproduction control in oviparous species.
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10
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Lombardo-Quezada J, Sanclemente G, Colmenero J, Español-Rego M, Arias MT, Ruiz P, Mauro E, Sastre L, Crespo G, Rimola A, Moreno A, Lozano F, Navasa M. Mannose-Binding Lectin-Deficient Donors Increase the Risk of Bacterial Infection and Bacterial Infection-Related Mortality After Liver Transplantation. Am J Transplant 2018; 18:197-206. [PMID: 28649744 DOI: 10.1111/ajt.14408] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 03/15/2017] [Revised: 05/23/2017] [Accepted: 06/13/2017] [Indexed: 01/25/2023]
Abstract
Mannose-binding lectin (MBL) is synthesized by the liver and binds to microbes. MBL2 gene polymorphisms produce intermediate/low/null or normal MBL serum levels (MBL-deficient or MBL-sufficient phenotypes, respectively). We aimed to evaluate the incidence and severity of infection, rejection, and survival within 1 year after liver transplantation (LT) according to donor and recipient MBL2 gene polymorphisms. A repeated-event analysis for infection episodes (negative binomial regression, Andersen-Gill model) was performed in 240 LTs. Four hundred twenty-eight infectious episodes (310 bacterial, 15 fungal, 65 cytomegalovirus [CMV]-related, and 38 viral non-CMV-related episodes) and 48 rejection episodes were recorded. The main bacterial infections were urinary (n = 82, 26%) and pneumonia (n = 69, 22%). LT recipients of MBL-deficient livers had a higher risk of bacterial infection (incidence rate ratio [IRR] 1.48 [95% confidence interval 1.04-2.09], p = 0.028), pneumonia (IRR 2.4 [95% confidence interval 1.33-4.33], p = 0.013), and septic shock (IRR 5.62 [95% confidence interval 1.92-16.4], p = 0.002) compared with recipients of MBL-deficient livers. The 1-year bacterial infection-related mortality was higher in recipients of MBL-deficient versus MBL-sufficient livers (65.8% vs. 56.1%, respectively; p = 0.0097). The incidence of rejection, viral, or fungal infection was similar in both groups. Recipient MBL2 genotype did not significantly increase the risk of bacterial infection. LT recipients of MBL-deficient livers have a higher risk of bacterial infection, pneumonia, septic shock, and 1-year bacterial infection-related mortality after LT.
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Affiliation(s)
- J Lombardo-Quezada
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - G Sanclemente
- Infectious Diseases Department, REIPI, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - J Colmenero
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - M Español-Rego
- Immunology Department, Center of Biomedical Diagnosis, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - M T Arias
- Immunology Department, Center of Biomedical Diagnosis, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - P Ruiz
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - E Mauro
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - L Sastre
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - G Crespo
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - A Rimola
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - A Moreno
- Infectious Diseases Department, REIPI, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - F Lozano
- Immunology Department, Center of Biomedical Diagnosis, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - M Navasa
- Liver Transplant Unit, CIBERehd, Barcelona, Spain.,Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
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11
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Mas V, Arias MT, Fabregat V, Nomdedeu B, Serrapagès C, Vives J, Martorell J, Carreras E, Ercilla MG. Description of a novel HLA-DRB1 allele found in a candidate for bone marrow transplantation*. ACTA ACUST UNITED AC 2004; 64:304-7. [PMID: 15304014 DOI: 10.1111/j.1399-0039.2004.00274.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
We report the identification of a new DRB1* allele in a Spanish Caucasoid family during a search for a histocompatible bone marrow donor. This novel allele, designated as DRB1*1145, differs from DRB1*1123 in one nucleotide at position 199 in exon 2 (A replacing T), leading to one amino acid change from phenylalanine (Phe) to isoleucine (Ile) at codon 67. The propositus's father had identical class II alleles but showed a minor mismatch at locus B (B*4403 by B*4402) and a C-locus mismatch (Cw*1502 by Cw*0501). We discuss the criteria of selecting a non-related bone marrow donor with a minor mismatch on the DRB1* allele or the related father having a minor mismatch at B locus and a C-locus mismatch.
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Affiliation(s)
- V Mas
- Servei d' Immunologia, Institut d' Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic, Barcelona, Spain
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Abstract
HLA-Cw*16 is a relatively common HLA-C specificity among Caucasoids, with Cw*1601 being the most frequent allele. We report herein the identification by sequence-based typing of a new HLA-Cw*16 allele in a Spanish Caucasoid blood donor. The novel allele, designated Cw*1606, differs from Cw*1601 by two nucleotide changes at positions 361 (T to A) and 368 (A to C) in exon 3, which leads to two amino acid changes from Trp (TGG) to Arg (AGG) and from Tyr (TAT) to Ser (TCT) at codons 97 and 99 in the alpha2 domain, respectively. Sequence comparisons suggest that the new HLA-Cw*1606 variant could have arisen from an intralocus gene conversion event.
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Affiliation(s)
- V Mas
- Servei d'Immunologia, Institut Clínic d'Infeccions i Immunologia (ICII), Institut d'Investigacions Mèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic, Barcelona, Spain
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Gimferrer I, Arias MT, Fabregat V, Martorell J, Vives J, Lozano F. HLA-B*5130, a new HLA-B allele carrying a rare nucleotide substitution in exon 4. Tissue Antigens 2003; 61:97-8. [PMID: 12622782 DOI: 10.1034/j.1399-0039.2003.610111.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report herein the identification of a new HLA-B*51 allele in a Spanish Caucasoid organ donor. The novel allele, designated B*5130, differs from B*51011 by one nucleotide change at position 787 (A to G) in exon 4, leading to an amino acid change from Arg (AGA) to Gly (GGA) at codon 239 in the alpha3 domain. This substitution is present in most classical and nonclassical HLA class I loci (A, C, E, and G) but not in any of the HLA-B alleles reported so far, except for B*7301. Although the frequency of the new variant seems to be low, its existence makes mandatory the analysis of exon 4 before assigning a B*5101 type.
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Affiliation(s)
- I Gimferrer
- Institut Clínic d'Infeccions i Immunologia, Institut d'Investigacions Mèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain
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Ercilla MG, Guardia A, Suárez B, Arias MT, Fabregat V, Costa M, Salinas I, Martorell J, Vives J, Lozano F. Identification of a new HLA-DRB1 allele (DRB1*0318) in three members of a Caucasian Spanish family. Tissue Antigens 2001; 57:489-91. [PMID: 11556978 DOI: 10.1034/j.1399-0039.2001.057005489.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This communication reports the identification of a new allele HLA-DRB1*03 in three members of a Caucasian Spanish family. The new allele has been officially named HLA-DRB1*0318 by the World Health Organization Nomenclature Committee. The exon 2 sequence of this new allele is identical to that of DRB1*03011 except for the first nucleotide of codon 45. The nucleotide change (C replacing G) leads to the amino acid substitution of glycine to arginine (GGG-->CGG) at position 45. This position of the beta1 domain shows very little polymorphism among DRB1* alleles (nucleotide changes at this position have only been reported for DRB1*1436 and DRB1*0105) and locates in the vicinity of the highly polymorphic position 47, which is a constituent of the groove's pocket interacting with the amino acid position 7 of the antigen peptide. The familial study showed that the new allele was maternally transmitted into the HLA-A*3002, -B*1801, -Cw*0501, -DRB1*0318, -DRB3*0202, -DQB1*0201 haplotype. Interestingly, the two siblings of the family, which were HLA identical and suffered of insulin-dependent diabetes mellitus (IDDM), were carriers of the two HLA haplotypes (DRB1*03/DQB1*0201 and DRB1*04/DQB1*0302) reported as susceptibility markers to IDDM in Caucasians.
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Affiliation(s)
- M G Ercilla
- Institut Clínic d'Infeccions i Immunologia (ICII), Institut d'Investigacions August Pi i Sunyer (IDIBAPS), Hospital Clínic, Barcelona, Spain.
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Padilla O, Calvo J, Vilà JM, Arman M, Gimferrer I, Places L, Arias MT, Pujana MA, Vives J, Lozano F. Genomic organization of the human CD5 gene. Immunogenetics 2000; 51:993-1001. [PMID: 11061284 DOI: 10.1007/s002510000235] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
CD5 is a member of the family of receptors which contain extracellular domains homologous to the type I macrophage scavenger receptor cysteine-rich (SRCR) domain. Here, we compare the exon/intron organization of the human CD5 gene with its mouse homologue, as well as with the human CD6 gene, the closest related member of the SRCR superfamily. The human CD5 gene spans about 24.5 kb and consists of at least 11 exons. These exons are conserved in size, number, and structure in the mouse CD5 homologue. No evidence for the biallelic polymorphism reported in the mouse could be found among a population of 100 individuals of different ethnic origins. The human CD5 gene maps to the Chromosome (Chr) 11q12.2 region, 82 kb downstream from the human CD6 gene, in a head-to-tail orientation, a situation which recalls that reported at mouse Chr 19. The exon/intron organization of the human CD5 and CD6 genes was very similar, differing in the size of intron 1 and the number of exons coding for their cytoplasmic regions. While several isoforms, resulting from alternative splicing of the cytoplasmic exons, have been reported for CD6, we only found evidence of a cytoplasmic tailless CD5 isoform. The conserved structure of the CD5 and CD6 loci, both in mouse and human genomes, supports the notion that the two genes may have evolved from duplication of a primordial gene. The existence of a gene complex for the SRCR superfamily on human Chr 11q (and mouse Chr 19) still remains to be disclosed.
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Affiliation(s)
- O Padilla
- Servei d'Immunologia, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain
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Lozano F, Arias MT, Vilà JM, Gimferrer I, Places L, Hummler A, Ehninger G, Martorell J, Vives J. Identification of a novel HLA-Cw*07 variant (Cw*0714) in a German Caucasian family. Tissue Antigens 2000; 55:86-8. [PMID: 10703619 DOI: 10.1034/j.1399-0039.2000.550119.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report herein the identification of a new HLA-Cw*07 allele in two members of a German Caucasian family. This novel allele, designated as Cw*0714, differs from Cw*07011 and Cw*0706 by two nucleotide changes: one at codon 66 (AAC-->AAG) in the exon 2, leading to an amino acid change from Asn to Lys; and another silent substitution at codon 99 (TAT-->TAC) in the exon 3. The latest substitution (T-->C at the third position of codon 99) was not seen in any of the HLA-Cw*07 alleles reported so far, thus being characteristic to the new HLA-Cw*0714 allele.
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Affiliation(s)
- F Lozano
- Servei d'Immunologia, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain
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Gimferrer I, Arias MT, Suárez B, Martorell J, Vives J, Lozano F. Discrepancies between serology- and sequence-based typing of HLA class I alleles among unrelated donor/recipient pairs. Transplant Proc 1999; 31:2579-80. [PMID: 10500726 DOI: 10.1016/s0041-1345(99)00509-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- I Gimferrer
- Servei d'Immunologia, Hospital Clínic, Barcelona, Spain
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Palou E, Mongay L, Arias MT, Isart F, Suárez B, Massó M, Fabregat V, Martorell J, Gayá A. Identification of a novel DRB1-allele (DRB1*0106) by sequence-based typing. Tissue Antigens 1999; 53:308-10. [PMID: 10203026 DOI: 10.1034/j.1399-0039.1999.530313.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report herein the identification of a new DRB1 allele using sequence-based typing. The new allele, DRB1*0106, was detected during routine HLA typing of a patient undergoing bone marrow transplantation. DRB1*0106 is identical to DRB1*0101 except for two codons, 71 (AGG-->GCG) and 86 (GGT-->GTG), changing the encoded arginine to alanine and glycine to valine. Both sequences were confirmed by polymerase chain reaction with sequence-specific primers (PCR-SSP). The polymorphism at codon 71 has not been, until now, identified in DRB1*01 alleles, although it is present in all the DRB1*15 alleles as well as DRB1*1309 and DRB1*1424.
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Affiliation(s)
- E Palou
- Servei d'Immunologia, Hospital Clínic, Barcelona, Spain
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