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Guzmán G, de Luis Román D, Rodas LV, Fernández LR, Reyes LM, Medina JAL, Candela CG, Bonmatí EM, Fernández de Sevilla SB, Palmero ÁM. Nutritional status change and its impact on quality of life and functionality in malnourish diabetic patients taking a high calorie, high protein tube feeding with slow release carbohydrates and monounsaturated fatty acids as a sole source of nutrition. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.644] [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: 10/19/2022]
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2
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Affiliation(s)
- Gastón Guzmán
- Institute de Ecología, Apartado Postal 63, Xalapa, Veracruz 91000, Mexico
| | - Clark L. Ovrebo
- Department of Biology, University of Central Oklahoma, 100 North University Drive, Edmond, Oklahoma, USA 73034-5209
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Reyes-Ocampo I, Córdova-Aguilar MS, Guzmán G, Blancas-Cabrera A, Ascanio G. Solvent-free mechanical extraction of Opuntia ficus-indica
mucilage. J FOOD PROCESS ENG 2018. [DOI: 10.1111/jfpe.12954] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- I. Reyes-Ocampo
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; Mexico City Mexico
| | - M. S. Córdova-Aguilar
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; Mexico City Mexico
| | - G. Guzmán
- Área de Ingeniería Química, Departamento de Ingeniería de Procesos e Hidráulica, División de Ciencias Básicas e Ingeniería; Universidad Autónoma Metropolitana, Unidad Iztapalapa; Vicentina Ciudad de México Mexico
| | - A. Blancas-Cabrera
- Unidad de Bioprocesos, Departamento de Biología Molecular y Biotecnología; Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México; Mexico City Ciudad de México Mexico
| | - G. Ascanio
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria; Mexico City Mexico
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Affiliation(s)
- Gastón Guzmán
- Laboratorio de Micologia, Departamento de Botánica, Escuela Nacional de Ciencias Biológicas, I. P. N., México, D. P. México
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Affiliation(s)
- Gastón Guzmán
- Laboratorio de Micología, Departamento de Botánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, D.F., México
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Affiliation(s)
- Gastón Guzmán
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Apartado Postal 26–378, México 16, D.F
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Affiliation(s)
- Gastón Guzmán
- Departamento de Botánica, Escuela Nacional de Ciencias Biológicas, Apartado Postal 26–378, México 4, D.F
| | - Jonathan Ott
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Apartado Postal 70–228, México 20, D.F
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Affiliation(s)
- James M. Trappe
- U. S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, Forestry Sciences Laboratory, Corvallis, Oregon 97330
| | - Gastón Guzmán
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Departamento de Botanica, Laboratorio de Micologia, Mexico 17, D. F
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Methven AS, Guzmán G. Notes on Clavariadelphus. II. Clavariadelphus Fasciculatus Sp. Nov. from Mexico. Mycologia 2018. [DOI: 10.1080/00275514.1988.12025740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Andrew S. Methven
- Botany Department, Eastern Illinois University, Charleston, Illinois 61920
| | - Gastón Guzmán
- Instituto Nacional de Investigaciones Sobre Recursos Bióticos, Apartado Postal 63, Xalapa, Veracruz 91000, Mexico
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Affiliation(s)
- Gastón Guzmán
- Instituto de Ecología, Apartado Postal 63, Xalapa, Veracruz 91000, Mexico
| | - Fidel Tapia
- Instituto de Ecología, Apartado Postal 63, Xalapa, Veracruz 91000, Mexico
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11
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Guzmán G, Vazquez-Arenas J, Ramos-Sánchez G, Bautista-Ramírez M, González I. Improved performance of LiFePO4 cathode for Li-ion batteries through percolation studies. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.06.172] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nunez Rodriguez A, Hernandez Y, Guzmán G, Jiménez Martinez M, Jimenez M, Guzman G, Hernandez Y, Nunez A. Analysis of Applied Behavior Treatment for Children with Autism Spectrum Disorder. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.01.2202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
According to Boesch et al., people with autism spectrum disorder (ASD) are at a greater risk of developing harmful behaviors, such as self-aggression and other challenging behaviors than individuals with normal development do not exhibit. The method of approach that is supported by scientific evidence for interventional procedures is applied behavior analysis, reported by Carr et al. [1].AimIn order to provide evidence-based intervention for autism from this approach in practice.MethodIn reference to a longitudinal approach, an intervention program was designed and implemented to serve 40 children with ASD, who were treated for one (1) year at the Victory BRT Institute in Florida, US. The behaviors targeted for reduction (excess behavioral), are the following: physical aggression, self-aggression and non-compliance. The program began with a baseline (12 consecutive days) with observations at home and others different natural contexts. The last three (3) months of the year consisted of monthly follow-up sessions to monitor the treatment implemented. The results were analyzed by repeated measures, ANOVA Sig (P = 0.003) (F = 8). Analyses show that the critical level associated with the effect of time-content interaction is strong, so the treatment generated a positive effect by reducing the behaviors targeted in time.ConclusionsThese results provide evidence that interventions from applied behavior analysis are effective.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Guzmán G, Ramírez-Guillén F, Miller OK, Lodge DJ, Baroni TJ. Scleroderma stellatum versus Scleroderma bermudense: the status of Scleroderma echinatum and the first record of Veligaster nitidum from the Virgin Islands. Mycologia 2017; 96:1370-9. [DOI: 10.1080/15572536.2005.11832886] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | | | - D. Jean Lodge
- Center for Forest Mycology Research, U.S. Department of Agriculture, Forest Service, Forest Products Lab., P.O. Box 1377 Luquillo, Puerto Rico 00773-1377
| | - Timothy J. Baroni
- Department of Biological Sciences, State University of New York College at Cortland, Cortland, New York 13045-0900
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Troncoso M, Barrios A, Balut F, Witting S, López C, Saez V, Guzmán G, Coria C, Díaz C, Flandes A, Henríquez K. Paroxysmal dyskinesias in pediatric patients. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.09.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Taguas E, Guzmán E, Guzmán G, Vanwalleghem T, Gómez J. Characteristics and importance of rill and gully erosion: a case study in a small catchment of a marginal olive grove. ACTA ACUST UNITED AC 2015. [DOI: 10.18172/cig.2644] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Guzmán G, Cortés-Pérez A, Guzmán-Dávalos L, Ramírez-Guillén F, Sánchez-Jácome MDR. An emendation of Scleroderma, new records, and review of the known species in Mexico. REV MEX BIODIVERS 2013. [DOI: 10.7550/rmb.31979] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Vélez-van-Meerbeke A, Zamora I, Guzmán G, Figueroa B, López Cabra C, Talero-Gutiérrez C. Evaluating executive function in schoolchildren with symptoms of attention deficit hyperactivity disorder. Neurología (English Edition) 2013. [DOI: 10.1016/j.nrleng.2012.06.004] [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: 10/26/2022] Open
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Vélez-van-Meerbeke A, Zamora I, Guzmán G, Figueroa B, López Cabra C, Talero-Gutiérrez C. Evaluación de la función ejecutiva en una población escolar con síntomas de déficit de atención e hiperactividad. Neurologia 2013; 28:348-55. [DOI: 10.1016/j.nrl.2012.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 05/02/2012] [Accepted: 06/30/2012] [Indexed: 10/28/2022] Open
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Nieto O, Castro J, Guzmán G, Foraster L, Fernández E. SOIL-MANAGEMENT SYSTEMS IN THE OLIVE ORCHARD AND INFLUENCE ON THE ORGANIC-MATTER AND NUTRIENT CONTENTS. ACTA ACUST UNITED AC 2012. [DOI: 10.17660/actahortic.2012.937.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Perez-Jiménez M, López B, Dorado G, Pujadas-Salvá A, Guzmán G, Hernandez P. Analysis of genetic diversity of southern Spain fig tree (Ficus carica L.) and reference materials as a tool for breeding and conservation. Hereditas 2012; 149:108-13. [PMID: 22804343 DOI: 10.1111/j.1601-5223.2012.02154.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The common fig tree (Ficus carica L.) is a Mediterranean crop with problematic cultivar identification. The recovery and conservation of possible local varieties for ecological production requires the previous genetic characterization of the available germplasm. In this context, 42 lines corresponding to 12 local varieties and two caprifigs, in addition to 15 reference samples have been fingerprinted using 21 SSR markers. A total of 77 alleles were revealed, detecting a useful level of genetic variability within the local germplasm pools. UPGMA clustering analysis has revealed the genetic structure and relationships among the local and reference germplasm. Eleven of the local varieties could be identified and defined as obtained clusters, showing that SSR analysis is an efficient method to evaluate the Andalusian fig tree diversity for on-farm conservation.
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Affiliation(s)
- M Perez-Jiménez
- Instituto de Agricultura Sostenible (IAS, CSIC), Alameda del Obispo s/n, Córdoba, Spain
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Garcia-Ruiz R, González de Molina M, Guzmán G, Soto D, Infante-Amate J. Guidelines for Constructing Nitrogen, Phosphorus, and Potassium Balances in Historical Agricultural Systems. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/10440046.2011.648309] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [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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Hernández A, Ponce de León R, García S, García R, Mora M, Gutiérrez M, Guzmán G. Parámetros genéticos en rasgos de la producción lechera y la longevidad de vacas Mambí de Cuba. Arch zootec 2011. [DOI: 10.4321/s0004-05922011000300040] [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: 11/11/2022] Open
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Kasuya T, Guzmán G. Veligaster nitidum, a pantropical sclerodermataceous fungus new to Japan and Thailand. MYCOSCIENCE 2007. [DOI: 10.1007/s10267-007-0359-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kasuya T, Guzmán G. <i>Veligaster nitidum</i>, a pantropical sclerodermataceous fungus new to Japan and Thailand. MYCOSCIENCE 2007. [DOI: 10.47371/mycosci.myc48259] [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: 04/03/2023]
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Abstract
Phytophthora cryptogea Pethybridge and Lafferty was consistently isolated from the Nemaguard rootstock (Prunus persica × P. davidiana) of peach trees in Chile. Symptoms included reddish necrotic tissues at the base of the trunk often extending to the main roots, root rot, gummosis, foliar chlorosis, lack of vigor, and dieback, with severely infected trees dying. Isolations with corn meal agar (Difco, Detroit, MI) amended with antibiotics and fungicides (ACMA) (2) and pure cultures were obtained by hyphal tip transfers to ACMA. Ten isolates from different locations were identified by morphology and growth at cardinal temperatures (1). These isolates produced hyphal swellings and sporangia by using carrot juice broth (2) for 48 h followed by the addition of 1% (w/v) nonsterilized soil extract. Sporangia were nonpapillate, internally proliferating, noncaducous, ovoid to obpyriform, and with mean dimensions of 36 × 24 μm. All isolates were typed as A1 using a P. cinnamomi A2 culture as the test isolate and produced oospores on clarified V8 juice agar amended with thiamine, tryptophan, and β-sitosterol (2) after 15 to 30 days at 20°C in the dark. Mycelia grew between 5 and 30°C, with optimal growth at 20°C and no growth at 35°C. The ITS sequence analysis performed by IMI (CABI Bioscience, Wallingford, UK) indicated a close match with P. cryptogea, P. drechsleri, and P. erythroseptica, however, peach isolates were differentiated from P. drechsleri and P. erythroseptica by the absence of mycelial growth at 35°C and the heterothallic production of oospores, respectively. Four P. cryptogea isolates were pathogenic when inoculated onto 1-year-old twigs detached from a Nemaguard tree, causing reddish necrotic lesions varying from 7 to 29 mm long after 15 days of incubation at 20°C. Two-year-old P. persica var. nectarina cv. Ruby Diamond budded on Nemaguard and cultivated in 100-liter containers in open field conditions were inoculated with 500-ml of a mycelial suspension (4.5 × 106 propagules per ml) per plant added to 15-cm-deep holes around the trunk. Plants were immediately irrigated and maintained at field capacity during the experiment. An equal number of noninoculated trees treated similarly were left as controls. During the spring, plants developed a general chlorosis and declined within 90 days postinoculation. Tests were repeated with similar results. In other preliminary tests, plants developed cankers characterized by gumming and reddish necrotic lesions underneath the bark following trunk inoculations with mycelium in agar of the same isolates obtained on ACMA. These tests were also repeated. The pathogen was consistently reisolated from symptomatic tissue. To our knowledge, this is the first report of P. cryptogea as a pathogen on peach trees in Chile. References: (1) F. J. Newhook et al. Mycol. Pap. No. 143. CMI, Kew, Surrey, UK, 1978. (2) W. F. Wilcox and B. A. Latorre. Plant Dis. 86:1357, 2002.
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Affiliation(s)
- G Guzmán
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - B A Latorre
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - W F Wilcox
- Department of Plant Pathology, New York State Agricultural Experiment Station, Cornell University, Geneva
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Guzmán G, Jacobs JQ, Ramírez-Guillén F, Murrieta D, Gándara E. The taxonomy of Psilocybe fagicola-complex. J Microbiol 2005; 43:158-65. [PMID: 15880091] [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: 05/02/2023]
Abstract
Psilocybe fagicola comprises a complex of more than eight species, six of them in Mexico, and all of them possessing a long pseudorhiza, a characteristic not listed by Heim and Cailleux in 1959 in the original description of the type species, but described by Guzmán in 1978 and 1983. The description of Psilocybe fagicola s.s. is here emended to include the length of the cheilocystidia of (6-) 12-20 (-30) microm, as well as the absence or scarcity of pleurocystidia. Psilocybe xalapensis and P. wassoniorum are considered to be synonymous with P. fagicola s.s. However, Psilocybe banderillensis and P. herrerae from Mexico, P. columbiana from Colombia, and P. keralensis from India are considered to be valid species within this complex. Moreover, P. novoxalapensis and P. teofilae, both from Mexico, are described as new species. Length of spores, presence or absence of pleurocystidia and their variations, and type of cheilocystidia constitute the principal defining characteristics of the species. Setaceous hyphae at the base of the stipe, as well as caulocystidia, lack taxonomic value, as do other morphological characteristics, including pileipellis and subpileipellis. A key to the eight considered species is also presented within the paper.
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Affiliation(s)
- Gastón Guzmán
- Instituto de Ecologia, Apartado Postal 63, Xalapa, Veracruz 91000, Mexico.
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Calonge FD, Kreisel H, Guzmán G. Bovista sclerocystis, a new species from Mexico. Mycologia 2004; 96:1152-1154. [PMID: 21148934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Bovista sclerocystis is described as a new species. It was found in Mexico, growing on rich soil of a tropical forest. It belongs to section Globaria, series Albosquamosa. The most striking character of this taxon is the exoperidium composed of polymorphous mycosclereids.
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Calonge FD, Kreisel H, Guzmán G. Bovista sclerocystis, a new species from Mexico. Mycologia 2004. [DOI: 10.1080/15572536.2005.11832913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | - Gastón Guzmán
- Instituto de Ecología, km 2.5 antigua carretera a Coatepec, Apartado Postal 63, Xalapa, Veracruz, 91000, Mexico
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Guzmán G, Tapia F, Ramírez-Guillén F, Baroni TJ, Lodge DJ, Cantrell SA, Nieves-Rivera AM. New species of Psilocybe in the Caribbean, with an emendation of P. guilartensis. Mycologia 2003; 95:1171-80. [PMID: 21149019 DOI: 10.1080/15572536.2004.11833026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Five new species of Psilocybe from the Caribbean are described: P. caribaea, P. egonii, P. subpsilocybioides, P. zapotecoantillarum and P. zapotecocaribaea. All except P. zapotecocaribaea, which is known only from Martinique, are native to Puerto Rico. Psilocybe guilartensis, previously described from Puerto Rico, is the most commonly collected species of Psilocybe in Puerto Rico. New information on morphology is provided for P. guilartensis, and an emendation of the species circumscription is presented.
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Affiliation(s)
- Gastón Guzmán
- Instituto de Ecología, Apartado Postal 63, Xalapa, Veracruz 91000, Mexico
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Hermida L, Rodríguez R, Lazo L, López C, Márquez G, Páez R, Suárez C, Espinosa R, García J, Guzmán G, Guillén G. A recombinant envelope protein from Dengue virus purified by IMAC is bioequivalent with its immune-affinity chromatography purified counterpart. J Biotechnol 2002; 94:213-6. [PMID: 11796173 DOI: 10.1016/s0168-1656(01)00406-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Semi-purified DEN-4 envelope protein, obtained in Pichia pastoris, was capable of generating neutralising and protecting antibodies after immunisation in mice. Here we compared two purification processes of this recombinant protein using two chromatographic steps: immune-affinity chromatography and immobilised metal ion adsorption chromatography (IMAC). The protein purified by both methods produced functional antibodies reflected by titres of haemagglutination inhibition and neutralisation. IMAC could be used as an alternative for high scale purification.
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Affiliation(s)
- L Hermida
- División de Vacunas, Centro de Ingeniería Genética y Biotecnología, Apdo 6162, La Habana, Cuba.
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Sánchez-Seco MP, Rosario D, Quiroz E, Guzmán G, Tenorio A. A generic nested-RT-PCR followed by sequencing for detection and identification of members of the alphavirus genus. J Virol Methods 2001; 95:153-61. [PMID: 11377722 DOI: 10.1016/s0166-0934(01)00306-8] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.1] [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: 11/21/2022]
Abstract
A specific and sensitive nested RT-PCR method was developed for the detection of members of the alphavirus genus. Based on available sequences, degenerated primers were selected in the nsP4 gene. Reaction components and thermal cycling parameters were investigated and standardised, and optimal ones were selected. As few as 25 pfu/tube could be detected. The identities of the amplified fragments were confirmed by sequencing, and phylogenetic analysis was carried out. The resulting phylogenetic tree could be applied to classify every alphavirus according to its serogroup. This technique is suitable for rapid, sensitive and reliable detection of these viruses and may be very valuable for diagnostic applications and surveillance.
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Affiliation(s)
- M P Sánchez-Seco
- Servicio de Microbiología Diagnóstica, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain.
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Pupo-Antúnez M, Rodriguez R, Alvarez M, Amin N, Rodriguez H, Otero A, Guzmán G. Development of a monoclonal antibody specific to a recombinant envelope protein from dengue virus type 4 expressed in Pichia pastoris. Hybridoma (Larchmt) 2001; 20:35-41. [PMID: 11289225 DOI: 10.1089/027245701300060409] [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: 11/13/2022]
Abstract
A mouse monoclonal antibody (MAb, 4B6) was able to recognize dengue virus type 4 envelope (E) protein both as a recombinant protein in Pichia pastoris and when it was present in infected brains of suckling mice. 4B6 was characterized by enzyme-linked immunoadsorbent assay (ELISA), hemaglutination inhibition, neutralization, and immunoblot. The MAb was isotyped as IgG2a. It was serotype 4 specific and it inhibited hemaglutination and neutralized homologous virus. It did not enhance infection of P338D1 cells by dengue type 4 virus strain H-241 strain. This MAb was reactive with recombinant E protein and dengue 4 virus, as revealed by Western blot. In vivo, MAb 4B6 conferred passive protection in mice challenged with homologous virus. Currently, this MAb is being used to purify recombinant E protein for further studies.
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Affiliation(s)
- M Pupo-Antúnez
- Virology Department, Tropical Medicine Institute, Pedro Kouri, Havana City, Cuba.
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Moya Mur JL, Guzmán G, Catalán P, Megías A, Ruiz S, Barrios V, Ortega J, de Pablo C, Harriague C, García Lledó A, Asín Cardiel E. [Yield of transthoracic echocardiography with high frequency transducer in the study of the anterior descending coronary artery]. Rev Esp Cardiol 2001; 54:16-21. [PMID: 11141450 DOI: 10.1016/s0300-8932(01)76259-8] [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: 11/16/2022]
Abstract
INTRODUCTION AND OBJECTIVES This study was performed to evaluate the feasibility and utility of a transthoracic high frequency transducer to detect and measure the left anterior descending coronary artery flow in patients with lesions in this artery or anterior myocardial infarction. MATERIALS AND METHODS We studied 11 subjects with lesions greater than 75% and another 10 with anterior myocardial infarction. We compared the results with a control group of 18 subjects. An ATL HDI 5000 ultrasound unit with a 5-8 MHz transducer was used to identify the left anterior descending in the anterior interventricular sulcus from an apical four chamber window. We considered that left anterior descending was detected when a diastolic predominant flow pattern was obtained with pulse Doppler. RESULTS Left anterior descending was detected in 37/39 of cases (94.4%). Patients with coronary lesions showed a decrease in the limit of significance in the diastolic/systolic peak velocity ratios: 2.5 (SD 0.7) vs 1.8 (SD 0.3) with a p = 0.024. Patients with anterior myocardial infarction obtained lower diastolic/systolic peak velocity ratios than controls: 2.5 (SD 0.7) vs 1.4 (SD 0.3) with a p = 0.001. CONCLUSIONS Left anterior descending coronary artery flow can be assessed by transthoracic high frequency echocardiography in greater than 90% of the cases. Patients with coronary lesions and those with anterior myocardial infarction have a decreased diastolic/systolic peak velocity ratio.
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Affiliation(s)
- J L Moya Mur
- Instituto de Cardiología. Hospital Ramón y Cajal. Madrid.
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35
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Guzmán G, Moya JL, Catalán P, Ortega J, de Pablo C, Asín E. [Left ventricular pseudoaneurysm with a fistula to right ventricle following previous repair of septal defect after acute myocardial infarction]. Rev Esp Cardiol 2000; 53:1287-91. [PMID: 10978241 DOI: 10.1016/s0300-8932(00)75231-6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A case of left ventricular pseudoaneurysm with a fistula to right ventricle is presented. It appeared following the repair of a ventricular septal defect after acute myocardial infarction. The left ventricular pseudoaneurysm is associated, in most cases, with acute myocardial infarction. However, we should not forget surgery as aetiology of this pathology. The most frequent post-surgery pseudoaneurysms appear after aneurysmectomy and after mitral valve replacement. They tend to develop fistulas which differ from post acute myocardial infarction pseudoaneurysms. Few cases have been described following the repair of septal defect and none of them complicated with a fistula to right ventricle, as in our case.
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Affiliation(s)
- G Guzmán
- Instituto de Cardiología. Hospital Ramón y Cajal. Madrid
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36
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Salmones D, Gaitán-Hernández R, Pérez R, Guzmán G. [Studies on genus Pleurotus. VIII. Interaction between mycelial growth and yield]. Rev Iberoam Micol 1997; 14:173-6. [PMID: 15538821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
This project studies the relationship between mycelial growth rate and production of basidiomata of 19 Pleurotus strains. Firstly, monosporic cultures were isolated of five strains from the following species: Pleurotus djamor (3), Pleurotus ostreatus (1) and Pleurotus pulmonarius (1). These were self-crossed in order to obtain 25 infraspecific dikaryons from which their mycelial growth rate was estimated. The parent strains and the 14 fastest growing crosses were cultivated in the pilot plant on barley straw with the following data recorded: days of incubation, primordia initiation, number of harvests, biological efficiency (BE), production rates (PR) and size of the basidiomes. The BE's fluctuated between 16.8 to 75.6% and the PR's between 0.34 to 1.68%. Most of the basidiomata presented a pileus diameter of 5-15 cm. With the exception of one cross with P. djamor, no increase was observed in the productivity and size of the carphophores of the crosses with respect to the parent strains, suggesting that the rapid mycelial growth rate of the strains was not reflected in the development of the fruiting bodies.
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Affiliation(s)
- D Salmones
- Departamento Hongos, Instituto de Ecología, Xalapa, Veracruz, México.
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37
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Pupo-Antúnez M, Rodríguez H, Vázquez S, Vilaseca JC, Alvarez M, Otero A, Guzmán G. Monoclonal antibodies raised to the dengue-2 virus (Cuban: A15 strain) which recognize viral structural proteins. Hybridoma (Larchmt) 1997; 16:347-53. [PMID: 9309425 DOI: 10.1089/hyb.1997.16.347] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Mouse monoclonal antibodies (MAbs) were raised to dengue-2 virus (D-2V) Cuban (A15) strain and the cell culture supernatants were screened by ELISA using the homologous virus. Three MAb-secreting lines were further characterized using immunoblot, haemaglutination, complement-fixation, and neutralization assays. One of these, MAb 8H8, weakly reacted with the viral nonstructural-1 protein (NS1) but more specifically identified the capsid protein (C), MAb 3E1 recognized in serological assays D-2V A15 but it had a weak reaction to C protein by immunodetection whereas another, MAb 4G3, weakly neutralized the homologous virus isolate and blocked the binding of specific anti-envelope (E) Mab, and its reaction with this protein could not be confirmed using immunoblot assays. These reagents are now being used to compare virulent plus avirulent Caribbean viruses antibody dependent enhancement (ADE) assays.
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Affiliation(s)
- M Pupo-Antúnez
- Hybridoma Unit, Institute of Tropical Medicine Pedro Kouri, Havana, Cuba
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38
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Chinchilla A, Cebollada A, Vega M, Díaz M, Guzmán G, Montes JM. [Treatment of dysthymia with sertraline]. Actas Luso Esp Neurol Psiquiatr Cienc Afines 1997; 25:3-9. [PMID: 9133155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We studied 50 patients (40 females, 10 males) diagnosed of dysthymia according to 1CD-10 criteria (F34.1), retrospectively and prospectively. All were treated with Sertraline, with an initial dose of Sertraline 50-100 mg/day, allowing increases to a maximum of 200 mg/day during the follow up. The clinical and therapeutical evolution was measured by HDRS (Hamilton Depression Rating Scale) 21 items, HARS (Hamilton Anxiety Rating Scale), Clinical Global Impression (CGI), subjective patient impression, compliance, secondary effects, complementary treatments when needed, severity, evolution evaluated on days 15, 30, 60 and 90, from the patient and psychiatrist perspective. Seventy two percent of the sample completed the three months of treatment. We obtained a good clinical efficacy with sertraline observed by a statistical significant decrease (p < 0.01) in the scales in the second week of treatment, which continued in following weeks. The mean doses varted from 78 mg/day to 98.7 mg/day during the three months of follow up The tolerance to Sertraline in our sample was good and similar to other data in the literature. Fourteen patients withdrew, but only six (12%) were due to secondary effects In spite of the study's limitations due to the lack of a control group, we could affirm that sertraline was an effective treatment for dysthymic patients and it should be recommended as a first choice in the treatment of affective disorders, facilitating other psychotherapeutical approach due to its favourable tolerance profile.
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Affiliation(s)
- A Chinchilla
- Servicio de Psiquiatría, Hospital Ramón y Cajal, Madrid
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39
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Lavebratt C, Ljungström I, Guzmán G, Thors C, Eriksson T, Akuffo HO. Evaluation of serological assays for diagnosis of onchocercosis. Scand J Infect Dis 1997; 29:65-70. [PMID: 9112301 DOI: 10.3109/00365549709008667] [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: 02/04/2023]
Abstract
Microscopic analysis of skin snips is the most widely used diagnostic technique for onchocercosis in endemic countries. The invasive nature and low sensitivity of that procedure has called for alternative diagnostic methods for this disease. Presently, serological assays detecting filariosis in general are available for routine analysis. However, serological assays specific for onchocercosis are still not universally available. We have evaluated the performance of a dot blot assay (DBA) as a potential method for specific detection of onchocercosis. The DBA, which detects IgG, as compared with 2 IgG4-immunoblot assays, all employing Onchocerca volvulus antigen. Furthermore, an enzyme-linked immunosorbent assay (ELISA) and an immunofluorescence assay (IFA) based on antigens from Acanthocheilonema viteae and Brugia malayi, respectively, were included in the comparison. Samples from microfilariae-positive patients and negative controls from the onchocercosis-endemic country Ghana were analysed. The DBA was significantly more sensitive and specific than the IgG4-assays and the ELISA, respectively. Furthermore, the anti-filarial Ig was increased in patients 1 month post-ivermectin treatment. Sera from patients with suspected filariosis from different parts of the world were analysed using DBA, ELISA and IFA. Patients responding positively in the DBA (12%) had clinical symptoms compatible with onchocercosis whereas those positive in ELISA and IFA (53% and 48%, respectively) had various clinical symptoms. These results indicate that the DBA is more specific than and as sensitive as the ELISA and the IFA presently used for the diagnosis of onchocercosis.
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Affiliation(s)
- C Lavebratt
- Department of Biochemistry and Biotechnology, Royal Institute of Technology, Stockholm, Sweden
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40
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Luna M, Guzmán G, Navarro L, de la Peña SS, Valverde-R C. Circadian rhythm of type II 5'deiodinase activity in the rat hypothalamic-pituitary-adrenal axis. Endocrine 1995; 3:597-601. [PMID: 21153138 DOI: 10.1007/bf02953025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/1994] [Accepted: 04/26/1995] [Indexed: 11/25/2022]
Abstract
Type II 5' deiodinase (5'D-II) activity was assessed in the hypothalamus (HP), pituitary (PIT), and adrenal gland (AG) of adult male rats after two different photoperiodic regimes: (1) cyclic light-dark conditions (LD, 12∶12) or (2) 4 days in continuous darkness (DD). Under cyclic LD conditions HP, PIT and AG 5'D-11 activity showed a significant circadian rhythm (P<0.004-<0.0001). The acrophases obtained by cosinor analysis were: HP, 12∶37; PIT, 03∶04 and AG, 02∶30 h. In contrast, after 4 days in DD, HP 5'D-II rhythmicity was abolished and there was a significant shift in the acrophase of both PIT and AG enzyme activity. These results suggest that the 5'D-II oscillation in PIT and AG corresponds to an endogenous circadian rhythm and is not only a response to the presence of a L/D cycle.
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Affiliation(s)
- M Luna
- Centro de Neurobiología, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, México, D F
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41
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Guzmán G, Gómez V, Moromizato P. [Zenker's diverticulum. Report of 2 cases]. Rev Gastroenterol Mex 1993; 58:369-70. [PMID: 8159906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We review the physiopathology of Zenker diverticulum, its clinic manifestations, diagnosis and treatment, we present two cases registered and treated in the Hospital General de la Zona No. 1 "Gabriel Mancera" of the Mexican Institute of Social Security (IMSS), and compare with the results of other authors, emphasizing the utility of the Total Parenteral Nutrition (TPN) in pre and post operative period, to improve the nutritional condition and diminish the post-operative complications and hospital stancy.
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Affiliation(s)
- G Guzmán
- Servicio de Cirugía General del Hospital General de Zona No. 1 Gabriel Mancera, Instituto Mexicano del Seguro Social, México, D.F
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43
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González P, Escobar MI, Csendes A, Lillo R, Fodor M, Guzmán G, Baum RP, Massardo T, Gaínza V, Otárola S. [Immunoscintigraphy in stomach neoplasms with anti-CEA BW 431/26 monoclonal antibodies marked with Tc 99 m]. Rev Med Chil 1991; 119:572-6. [PMID: 1844299] [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: 12/29/2022]
Abstract
A 57 year old female had a tubular gastric adenocarcinoma confirmed by endoscopy and radiologic studies. Echotomography of the abdomen revealed multiple adenopathies. Immunoscintigraphy with 99mTc labeled anti-CEA BW 431/26 monoclonal antibody was performed. Images obtained at 6 and 24 h showed a significant uptake at the primary lesion and at periaortic adenopathies both in conventional gamma-camera and single emission photon tomography. This immuno-scintigraphic technique may be helpful in the management of patients with gastric cancer.
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Affiliation(s)
- P González
- Departamento de Cirugía, Hospital Clínico de la Universidad de Chile, Santiago de Chile
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44
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Etcheverry R, Allamand JP, Guzmán G, Robinson MI. [Ectopic or migrating spleen and supernumerary spleens: detection and identification with 99mTc, 51Cr and 113In radioisotopes]. Rev Med Chil 1989; 117:1403-8. [PMID: 2519380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Congenital malformations of the spleen are rare. We report a patient with an ectopic spleen located in the left iliac fossa, which was excised in order to prevent severe complications such as torsion of the pedicle, rupture or infection. A second patient with idiopathic thrombocytopenic purpura presented with an accessory spleen located retroperitoneally. Removal of this spleen following removal of the normotopic one resulted in cure of purpura. The clinical, radiological and radioisotopic studies used to locate and identify these malformations are described.
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45
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Palma A, Guzmán G, Robinson MI, Hott R, Palma J. Gammasubdurography in the diagnosis of chronic subdural bilateral and communicating effusion in infants. Acta Neurochir (Wien) 1985; 76:117-20. [PMID: 4025015 DOI: 10.1007/bf01418471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The results obtained by means of Gammasubdurography (G.S.G.) in 37 infants having chronic subdural bilateral effusions, are presented. The use of this procedure, which consists of unilateral injection of Radioiodinated Human Sero Albumin (RIHSA-I 131), into the subdural effusion, is suggested for the determination of a communication between the two cavities. At the same time it is possible to get valuable information about their exact localization and extension. Once the communication is diagnosed, the treatment proposed is internal or external unilateral drainage. The method is safe and is performed in a short time which permits its use in the screening of these patients, especially in conjunction with Gammaencephalography (G.E.G.) and Computer Tomography (CT), patients to it. The test (G.S.G.) has been used by us since 1979. All our cases are included in this series. All of them had been diagnosed by subdural puncture, transillumination, G.E.G. and or CT Scan, as having bilateral subdural collections. All the patients received a saturated iodine solution, 24 hours in advance and for 10 days, as a thyroid blocking agent, which was administered in the usual oral dosage. The radiopharmaceutical administration was performed through a unilateral subdural puncture in a dose of 50 to 80 microcurie of RIHSA-I 131 with a high specific activity. Immediately after this, sequential analog images were obtained with the patient supine and in anterior and lateral head projections. This was accomplished by using a PICKER DYNA 4 Gammacamera equipped with a medium energy parallel hole collimator. The interval between the images was determined during the test in agreement with the findings.
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46
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Olea E, Palma A, Guzmán G, Robinson MI, Hott R. [Gammaencephalography with Tc-99m DTPA in the diagnosis of ventriculitis]. Rev Chil Pediatr 1983; 54:233-236. [PMID: 6658053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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47
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Acevedo A, Arinoviche R, Palma A, Olea E, Guzmán G, Arriagada M, Grisanti M, Testar R. [Reserpine administration by retrograde intravenous route in patients with Raynaud's phenomenon]. Rev Med Chil 1982; 110:1063-5. [PMID: 7184095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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48
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49
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Guzmán G. Variation, distribution, ethnomycological data and relationships of Psilocybe aztecorum, a Mexican hallucinogenic mushroom. Mycologia 1978; 70:385-96. [PMID: 566852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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50
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Guzmán G, Ott J, Boydston J, Pollock SH. Psychotropic mycoflora of Washington, Idaho, Oregon, California and British Columbia. Mycologia 1976; 68:1267-72. [PMID: 1034879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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