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Marciano S, Dirchwolf M, Torres MC, Allevato J, García Dans C, García B, Pollarsky F, Gaite L, Sirotinsky E, Rios B, Anselmo MN, Peche M, Hurtado E, Haddad L, Narvaez A, Mauro E, Martinez A, Bellizzi C, Ratusnu N, D'Amico C, Arora S, Gadano A. Fibrosis assessment in patients with nonalcoholic fatty liver disease: Adherence to proposed algorithms and barriers to complying with them. Rev Gastroenterol Mex (Engl Ed) 2021; 87:4-12. [PMID: 34690105 DOI: 10.1016/j.rgmxen.2021.09.002] [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] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 08/24/2020] [Indexed: 11/30/2022]
Abstract
INTRODUCTION AND AIMS Fibrosis staging in patients with nonalcoholic fatty liver disease (NAFLD) is carried out through the application of stepwise algorithms but there is little real-world data on their use. Our aim was to calculate the number of patients with NAFLD and indeterminate or high risk for fibrosis, assessed through noninvasive scores, that consequently underwent further staging evaluation. MATERIALS AND METHODS A cross-sectional multicenter cohort study was conducted on patients with NAFLD evaluated by hepatologists within the time frame of June 1 and July 31, 2018. The FIB-4 and NAFLD fibrosis scores were calculated in all the patients, and if at least one of the scores suggested indeterminate or high risk for fibrosis, we believed the patient should have undergone additional fibrosis staging assessment. RESULTS The study included 238 patients. The median time interval from NAFLD diagnosis and inclusion in the analysis was 12.2 months (IQR 3.0-36.5). A total of 128 (54%) patients had at least one noninvasive score that suggested indeterminate or high risk for fibrosis but studies to confirm the fibrosis grade (elastography, biopsy, etc.) were performed on only 72 (56%). The main barriers encountered by the physicians for applying the staging algorithms were related to health insurance coverage and imaging study costs. CONCLUSIONS A high percentage of patients with NAFLD were at indeterminate or high risk for fibrosis, according to noninvasive scores, but additional studies were carried out on only half of them, showing low adherence to current recommendations.
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Affiliation(s)
- S Marciano
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Departamento de Investigación, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
| | - M Dirchwolf
- Sección Hepatología, Hospital Privado de Rosario, Rosario, Argentina
| | - M C Torres
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J Allevato
- Unidad de Diagnóstico y Tratamiento para Enfermedades Hepáticas de Neuquén, Neuquén, Argentina
| | - C García Dans
- Sección Hepatología, Hospital Zonal Bariloche Dr. Ramón Carrillo, Bariloche, Argentina
| | - B García
- Sección Hepatología, Centro de Estudios Digestivos de Mendoza, Mendoza, Argentina
| | - F Pollarsky
- Sección Hepatología, Hospital Dr. Carlos Bonorino Udaondo, Buenos Aires, Argentina
| | - L Gaite
- Sección Hepatología, Clínica de Nefrología, Santa Fe, Argentina
| | - E Sirotinsky
- Centro de Estudios Digestivos, Comodoro Rivadavia, Argentina
| | - B Rios
- Hepatología, Centro de Investigación, Neuquén, Argentina
| | - M N Anselmo
- Sección Gastroenterología y Hepatología, Hospital Zonal Esquel, Esquel, Argentina
| | - M Peche
- Hospital López Lima Gral Roca, Rio Negro, Argentina
| | - E Hurtado
- Hospital Municipal Coronel Suárez, Buenos Aires, Argentina
| | - L Haddad
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - A Narvaez
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - E Mauro
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - A Martinez
- Sección Gastroenterología, Hospital Juan A. Fernández, Buenos Aires, Argentina
| | - C Bellizzi
- Sección Gastroenterología, Hospital Juan A. Fernández, Buenos Aires, Argentina
| | - N Ratusnu
- Hospital Regional de Ushuaia, Ushuaia, Tierra del Fuego, Argentina
| | - C D'Amico
- Hepatología, CEMA - Centro de Especialidades Médicas Ambulatoria, Mar del Plata, Argentina
| | - S Arora
- Project ECHO, School of Medicine, University of New Mexico, Albuquerque, New Mexico, United States
| | - A Gadano
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Departamento de Investigación, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
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Marciano S, Dirchwolf M, Torres MC, Allevato J, García Dans C, García B, Pollarsky F, Gaite L, Sirotinsky E, Rios B, Anselmo MN, Peche M, Hurtado E, Haddad L, Narvaez A, Mauro E, Martinez A, Bellizzi C, Ratusnu N, D Amico C, Arora S, Gadano A. Fibrosis assessment in patients with nonalcoholic fatty liver disease: Adherence to proposed algorithms and barriers to complying with them. Rev Gastroenterol Mex (Engl Ed) 2021; 87:S0375-0906(21)00015-X. [PMID: 33773856 DOI: 10.1016/j.rgmx.2020.08.006] [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] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 08/13/2020] [Accepted: 08/24/2020] [Indexed: 11/29/2022]
Abstract
INTRODUCTION AND AIMS Fibrosis staging in patients with nonalcoholic fatty liver disease (NAFLD) is carried out through the application of stepwise algorithms but there is little real-world data on their use. Our aim was to calculate the number of patients with NAFLD and indeterminate or high risk for fibrosis, assessed through noninvasive scores, that consequently underwent further staging evaluation. MATERIALS AND METHODS A cross-sectional multicenter cohort study was conducted on patients with NAFLD evaluated by hepatologists within the time frame of June 1 and July 31, 2018. The FIB-4 and NAFLD fibrosis scores were calculated in all the patients, and if at least one of the scores suggested indeterminate or high risk for fibrosis, we believed the patient should have undergone additional fibrosis staging assessment. RESULTS The study included 238 patients. The median time interval from NAFLD diagnosis and inclusion in the analysis was 12.2months (IQR 3.0-36.5). A total of 128 (54%) patients had at least one noninvasive score that suggested indeterminate or high risk for fibrosis but studies to confirm the fibrosis grade (elastography, biopsy, etc.) were performed on only 72 (56%). The main barriers encountered by the physicians for applying the staging algorithms were related to health insurance coverage and imaging study costs. CONCLUSIONS A high percentage of patients with NAFLD were at indeterminate or high risk for fibrosis, according to noninvasive scores, but additional studies were carried out on only half of them, showing low adherence to current recommendations.
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Affiliation(s)
- S Marciano
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Departamento de Investigación, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
| | - M Dirchwolf
- Sección Hepatología, Hospital Privado de Rosario, Rosario, Argentina
| | - M C Torres
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J Allevato
- Unidad de Diagnóstico y Tratamiento para Enfermedades Hepáticas de Neuquén, Neuquén, Argentina
| | - C García Dans
- Sección Hepatología, Hospital Zonal Bariloche Dr. Ramón Carrillo, Bariloche, Argentina
| | - B García
- Sección Hepatología, Centro de Estudios Digestivos de Mendoza, Mendoza, Argentina
| | - F Pollarsky
- Sección Hepatología, Hospital Dr. Carlos Bonorino Udaondo, Buenos Aires, Argentina
| | - L Gaite
- Sección Hepatología, Clínica de Nefrología, Santa Fe, Argentina
| | - E Sirotinsky
- Centro de Estudios Digestivos, Comodoro Rivadavia, Argentina
| | - B Rios
- Hepatología, Centro de Investigación, Neuquén, Argentina
| | - M N Anselmo
- Sección Gastroenterología y Hepatología, Hospital Zonal Esquel, Esquel, Argentina
| | - M Peche
- Hospital López Lima Gral Roca, Rio Negro, Argentina
| | - E Hurtado
- Hospital Municipal Coronel Suárez, Buenos Aires, Argentina
| | - L Haddad
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - A Narvaez
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - E Mauro
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - A Martinez
- Sección Gastroenterología, Hospital Juan A. Fernández, Buenos Aires, Argentina
| | - C Bellizzi
- Sección Gastroenterología, Hospital Juan A. Fernández, Buenos Aires, Argentina
| | - N Ratusnu
- Hospital Regional de Ushuaia, Ushuaia, Tierra del Fuego, Argentina
| | - C D Amico
- Hepatología, CEMA - Centro de Especialidades Médicas Ambulatoria, Mar del Plata, Argentina
| | - S Arora
- Project ECHO, School of Medicine, University of New Mexico, Albuquerque, New Mexico, Estados Unidos de América
| | - A Gadano
- Sección Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Departamento de Investigación, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
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Moreira-Soto A, Torres MC, Lima de Mendonça MC, Mares-Guia MA, Dos Santos Rodrigues CD, Fabri AA, Dos Santos CC, Machado Araújo ES, Fischer C, Ribeiro Nogueira RM, Drosten C, Sequeira PC, Drexler JF, Bispo de Filippis AM. Evidence for multiple sylvatic transmission cycles during the 2016-2017 yellow fever virus outbreak, Brazil. Clin Microbiol Infect 2018; 24:1019.e1-1019.e4. [PMID: 29427798 DOI: 10.1016/j.cmi.2018.01.026] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [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: 11/27/2017] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Since December 2016, Brazil has experienced an unusually large outbreak of yellow fever (YF). Whether urban transmission may contribute to the extent of the outbreak is unclear. The objective of this study was to characterize YF virus (YFV) genomes and to identify spatial patterns to determine the distribution and origin of YF cases in Minas Gerais, Espírito Santo and Rio de Janeiro, the most affected Brazilian states during the current YFV outbreak. METHODS We characterized near-complete YFV genomes from 14 human cases and two nonhuman primates (NHP), sampled from February to April 2017, retrieved epidemiologic data of cases and used a geographic information system to investigate the geospatial spread of YFV. RESULTS All YFV strains were closely related. On the basis of signature mutations, we identified two cocirculating YFV clusters. One was restricted to the hinterland of Espírito Santo state, and another formed a coastal cluster encompassing several hundred kilometers. Both clusters comprised strains from humans living in rural areas and NHP. Another NHP lineage clustered in a basal relationship. No signs of adaptation of YFV strains to human hosts were detected. CONCLUSIONS Our data suggest sylvatic transmission during the current outbreak. Additionally, cocirculation of two distinct YFV clades occurring in humans and NHP suggests the existence of multiple sylvatic transmission cycles. Increased detection of YFV might be facilitated by raised awareness for arbovirus-mediated disease after Zika and chikungunya virus outbreaks. Further surveillance is required, as reemergence of YFV from NHPs might continue and facilitate the appearance of urban transmission cycles.
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Affiliation(s)
- A Moreira-Soto
- Institute of Virology, University of Bonn Medical Centre, Bonn, Germany; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Institute of Virology, Germany
| | - M C Torres
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - M C Lima de Mendonça
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - M A Mares-Guia
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | | | - A A Fabri
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - C C Dos Santos
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - E S Machado Araújo
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - C Fischer
- Institute of Virology, University of Bonn Medical Centre, Bonn, Germany
| | - R M Ribeiro Nogueira
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - C Drosten
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Institute of Virology, Germany; German Centre for Infection Research (DZIF), Germany
| | - P Carvalho Sequeira
- Laboratório de Flavivírus, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - J F Drexler
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Institute of Virology, Germany; German Centre for Infection Research (DZIF), Germany.
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Roger A, Arcalá Campillo E, Torres MC, Millan C, Jáuregui I, Mohedano E, Liñan S, Verdu P, Rubira N, Santaolalla M, González P, Orovitg A, Villarrubia E. Reduced work/academic performance and quality of life in patients with allergic rhinitis and impact of allergen immunotherapy. Allergy Asthma Clin Immunol 2016; 12:40. [PMID: 27525014 PMCID: PMC4982204 DOI: 10.1186/s13223-016-0146-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 08/01/2016] [Indexed: 11/10/2022] Open
Abstract
Background Allergic rhinitis (AR) is characterised by burdensome nasal and/or ocular symptoms. This inflammatory disease can be debilitating and thus result in considerable health-related and economic consequences. Methods In a cross-sectional study, adult subjects with AR (N = 683) completed three allergy-specific questionnaires that assessed the impact of AR on the work/academic performance, daily activities, health-related quality of life (HRQOL), and satisfaction with allergen immunotherapy (AIT). Regression analyses were used to examine the associations between several clinical variables and the patient-reported outcomes. Results Total loss of productivity was 21.0 and 21.2 % for employed and student patients, respectively, whereas the impairment of daily activities was 22.0 %. The mean overall HRQOL score was 1.94 ± 1.29 (on the scale of 0–6 points). Global score for satisfaction with AIT was 65.5 ± 24.8 (on a 0–100 scale). Simple regression analysis found statistically significant associations between loss of work and academic productivity, impairment of daily activities and the type and severity of AR. AIT was a protective factor. The persistent and more severe types of AR and lack of AIT contributed to the worsening of HRQOL. Conclusions AR (the persistent and more severe form of the disease) has an impact on functional characteristics of adult patients in Spain. AIT might reduce the effect of this disease on the work/academic performance and HRQOL. Trial registration Retrospectively registered
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Affiliation(s)
- A Roger
- Allergy Unit, Germans Trias i Pujol Hospital, Badalona, Spain
| | | | - M C Torres
- Unidad de Alergia, Hospital Casa de Salud, Valencia, Spain
| | - C Millan
- Unidad de Alergia, Hospital Jerez de la Frontera, Jerez de la Frontera, Spain
| | - I Jáuregui
- Servicio de Alergia, Hospital Universitario de Basurto, Bilbao, Spain
| | - E Mohedano
- Servicio de Alergia, Hospital Universitario de Fuenlabrada, Fuenlabrada, Spain
| | - S Liñan
- Neumología Pediátrica, Hospital de Nens de Barcelona, Barcelona, Spain
| | - P Verdu
- Servicio de Alergia, Hospital Universitario de Gran Canaria Dr. Negrín, Las Palmas de Gran Canaria, Spain
| | - N Rubira
- Unidad de Alergia, Centro Sanitario C Mora, Sant Cugat, Barcelona, Spain
| | - M Santaolalla
- Servicio de Alergia, Hospital Universitario de Sanchinarro, Madrid, Spain
| | - P González
- Servicio de Alergia, Hospital General Universitario de Alicante, Alicante, Spain
| | - A Orovitg
- Unidad de Alergia, Hospital Viamed Santa Angela de la Cruz, Seville, Spain
| | - E Villarrubia
- Health Outcomes Research Department, 3D Health Research, Balmes 152 6º 2ª, 08008 Barcelona, Spain
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Torres MC, Beltrame MH, Santos ICR, Picheth G, Petzl-Erler ML, Pedrosa FO, Steffens MBR, de Souza EM. Polymorphisms of the promoter and exon 3 of the receptor for advanced glycation end products (RAGE) in Euro- and Afro-Brazilians. Int J Immunogenet 2011; 39:155-60. [PMID: 22133449 DOI: 10.1111/j.1744-313x.2011.01073.x] [Citation(s) in RCA: 9] [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: 11/30/2022]
Abstract
The receptor for advanced glycation end products (RAGE or AGER), a member of the immunoglobulin superfamily, is involved in pathologies such as atherosclerosis and diabetes. Over 50 SNPs were reported for RAGE, among which were the promoter region polymorphisms -429T>C (rs1800625), -374T>A (rs1800624) and a 63-bp deletion (-407 to -345 bp), all related to increased RAGE expression. Additionally, in the exon 3, a putative site of binding ligands, the missense variation G82S (rs2070600) was associated with skin disorders in patients with diabetes. We have determined allele, genotype and haplotype frequencies of RAGE polymorphisms -429T>C, -374T>A, 63-bp deletion and G82S in Euro-Brazilians (n = 108) and Afro-Brazilians (n = 91), characterized according to the predominant ancestry of the individuals. The allele frequencies for Euro- and Afro-Brazilians were as follows: -429C, 12.5% vs. 12.1% (P = 0.90); -374A, 31.5% vs. 26.2% (P = 0.25); 63del, 0.0% vs. 3.8% (P = 0.004); and 82S, 1.9% vs. 0.6% (P = 0.24). Absolute linkage disequilibrium was found between the promoter polymorphisms -429T>C and -374T>A plus the 63-bp deletion (D'=1.000; P < 0.0001). The haplotype frequencies differed (P = 0.003) between Euro- and Afro-Brazilians. Our results showed that the frequencies of the 63-bp deletion were higher in Afro-Brazilians, while the other analysed polymorphisms were similarly distributed in the studied populations. The -374T>A plus 63-bp deletion polymorphism captures more than 80% of the haplotypic variation in the studied population.
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Affiliation(s)
- M C Torres
- Department of Biochemistry and Molecular Biology, Federal University of Parana, Curitiba, Parana, Brazil
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Santos JAM, Sarmento S, Alves P, Torres MC, Bastos AL, Ponte F. Single-acquisition method for simultaneous determination of extrinsic gamma-camera sensitivity and spatial resolution. Appl Radiat Isot 2007; 66:44-9. [PMID: 17855102 DOI: 10.1016/j.apradiso.2007.07.024] [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] [Received: 05/17/2007] [Revised: 06/18/2007] [Accepted: 07/23/2007] [Indexed: 11/27/2022]
Abstract
A new method for measuring simultaneously both the extrinsic sensitivity and spatial resolution of a gamma-camera in a single planar acquisition was implemented. A dual-purpose phantom (SR phantom; sensitivity/resolution) was developed, tested and the results compared with other conventional methods used for separate determination of these two important image quality parameters. The SR phantom yielded reproducible and accurate results, allowing an immediate visual inspection of the spatial resolution as well as the quantitative determination of the contrast for six different spatial frequencies. It also proved to be useful in the estimation of the modulation transfer function (MTF) of the image formation collimator/detector system at six different frequencies and can be used to estimate the spatial resolution as function of the direction relative to the digital matrix of the detector.
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Affiliation(s)
- J A M Santos
- Serviço de Física Médica, Instituto Português de Oncologia Francisco Gentil do Porto, E.P.E., Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
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Abstract
Acrylates are a well-known cause of occupational contact dermatitis due to its widespread use in several settings such as dentistry, orthopaedic surgery, graphic industry and cosmetics. We describe the case of a manicurist who developed occupational rhinitis and allergic contact dermatitis induced by the application of acrylic-sculptured nails.
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Affiliation(s)
- M C Torres
- Allergy Department, Universitary Hospital La Fe, Valencia, Spain.
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Valls-Bellés V, Torres MC, Muñiz P, Boix L, González-Sanjose ML, Codoñer-Franch P. The protective effects of melanoidins in adriamycin-induced oxidative stress in isolated rat hepatocytes. J Sci Food Agric 2004; 84:1701-1707. [DOI: 10.1002/jsfa.1859] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
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Torres MC, Ramos ME, Coelho TL, Harari S. Salivary Streptococcus mutans and Lactobacillus sp levels in cardiac children. J Clin Pediatr Dent 2002; 26:103-9. [PMID: 11688806] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
This study assesses salivary conditions of 20 children with cardiac disease comparing with a control group of 15 healthy children. The results showed that there was no difference between the groups on salivary flow, buffer capacity and the level of Streptococcus mutans (Sm). The test group i.e., children with cardiac disease, showed a lower level of Lactobacillus sp. The association between the usage of antibiotics and the risk of developing caries, measuring the level of Streptococcus mutans and Lactobacillus sp., showed that children taking antibiotics frequently had a significant lower level of Lactobacillus sp (p<0.05) than healthy children. This association was not found on relation to the levels of Streptococcus mutans.
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Affiliation(s)
- M C Torres
- Department of Periodontology, Estacio de Sa University, UNESA-RJ, Brazil
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Abstract
The article describes the development of a child with Joubert Syndrome who, since the age of 16 months, has received personalized stimulation therapy at home and in the Early Intervention Unit (EIU) of the Faculty, in each of the five areas considered by the Portage Guide to Early Education: socialization, language, self-help, cognition, and motoricity. Repeated evaluations during the treatment (up to age 40 months) showed show progress in all developmental areas, as well as in general attitude to and capacity for learning. During treatment, greatest progress was made in the areas of cognition and communication.
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Affiliation(s)
- M C Torres
- Universidad de Santiago, Departamento de Psicología Evolutiva y de la Educación, 15706 Santiago de Compostela, Spain.
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Milian-Suazo F, Salman MD, Black WC, Triantis JM, Ramirez C, Payeur JB, Torres MC. Molecular epidemiologic analysis of Mycobacterium bovis isolates from Mexico. Am J Vet Res 2000; 61:90-5. [PMID: 10630786 DOI: 10.2460/ajvr.2000.61.90] [Citation(s) in RCA: 12] [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: 11/20/2022]
Abstract
OBJECTIVE To assess phylogenetic relationships among Mycobacterium bovis isolates by use of random amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) fingerprinting and to relate genetic profiles of isolates to epidemiologic characteristics. ANIMALS 400 cattle with tuberculosis. PROCEDURE Mycobacterium bovis was isolated from various organs of cattle slaughtered in 6 geographic regions of Mexico. Most cattle were adult Holsteins from large herds that did not participate in a tuberculosis control program. Four random primers and 2 selected primers were used in RAPD-PCR fingerprinting of 88 isolates. Pairwise genetic distance between isolates was obtained and subjected to cluster analysis with bootstrapping to test for levels of support. RESULTS 98 different fragments were obtained; there was broad genetic diversity among isolates, and each isolate had a unique RAPD-genotype, including those originating from the same herd. Clustering by geographic location, affected organ, or severity of lesion was not detected. Linkage disequilibrium analysis suggested that M. bovis was highly clonal and that mutations develop at a rapid rate among isolates. CONCLUSIONS AND CLINICAL RELEVANCE Use of RAPD-PCR could not differentiate M. bovis isolates by epidemiologic characteristics or identify common sources of infection.
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Affiliation(s)
- F Milian-Suazo
- CENID-Microbiología, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Km Palo Alto, DF, México
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Torres MC, Varaprasad CV, Johnson F, Iden CR. Formation of s-triazines during aerial oxidation of 8-oxo-7,8-dihydro-2'-deoxyguanosine in concentrated ammonia. Carcinogenesis 1999; 20:167-72. [PMID: 9934865 DOI: 10.1093/carcin/20.1.167] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
After automated DNA synthesis, oligodeoxynucleotides containing 8-oxoguanine are sensitive to aerial oxidation when subjected to the basic conditions necessary for deprotection and release of the oligomer from the control pore glass support. The major oxidation products of this heterocyclic moiety have been characterized by permitting 8-oxo-7,8-dihydro-2'-deoxyguanosine to react with oxygen in the presence of 28% aqueous ammonia at room temperature. Products were isolated by reverse phase HPLC and analyzed by electrospray ionization-mass spectrometry and gas chromatography-mass spectrometry of the trimethylsilyl-derivatives. 2-Amino-4-hydroxy-s-triazine-6-carboxylic acid and 2-amino-4-hydroxy-6-carbamyl-s-triazine were identified by these techniques and standards were synthesized. In addition, GC-MS analysis revealed other oxidation products, including urea, guanidine and 2-deoxyribose, which were not observed by HPLC because these compounds are transparent in the UV region of the spectrum. Both s-triazines were also observed when a purified, synthetic oligodeoxynucleotide containing a single 8-oxoguanine moiety was exposed to the same conditions. Oxidation of 8-oxoguanine appears to parallel the uric acid oxidation pathway, and a mechanistic scheme is proposed to account for the products of degradation.
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Affiliation(s)
- M C Torres
- Department of Pharmacological Sciences, State University of New York at Stony Brook, Health Sciences Center, 11794-8651, USA
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Abstract
This case-control study (n = 100 dental patients, matched for age and sex) investigated the role of life-events in periodontitis. Data collected included life events, tobacco use, oral health behaviours and socio-demographics. The results of conditional simple logistic regression analysis showed that periodontitis was associated with the negative impact of life-events (p < 0.01), the number of negative life-events (p < 0.05), high levels of dental plaque (p < 0.01), tobacco smoking (p < 0.01) and being unemployed (p < 0.05). These associations remained statistically significant after adjusting for oral health behaviour and socio-demographic variables, but not tobacco smoking (p > 0.05). Marital status became statistically significant after adjusting for the other variables (p < 0.05). A model is suggested to explain the pathways through which life events may affect periodontal health. It was concluded that psychosocial factors and oral health risk behaviours cluster together as important determinants of periodontitis.
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Affiliation(s)
- R Croucher
- Joint Department of Dental Public Health, University College London, UK
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14
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Torres MC, Rieger RA, Iden CR. Characterization of the alkaline degradation products of an oligodeoxynucleotide containing 8-oxo-7,8-dihydro-2'-deoxyguanosine by electrospray ionization mass spectrometry. Chem Res Toxicol 1996; 9:1313-8. [PMID: 8951234 DOI: 10.1021/tx960107t] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 02/03/2023]
Abstract
Oligodeoxynucleotides containing 8-oxo-7,8-dihydro-2'-deoxyguanosine exhibit alkaline sensitivity and undergo cleavage of the phosphodiester backbone. Identification of the major degradation products and unstable intermediates formed in concentrated ammonia was accomplished by HPLC isolation and characterization by electrospray ionization mass spectrometry. Unstable intermediates were reduced in situ with NaBH4 prior to isolation and mass analysis. This technique produced accurate mass data for an oligonucleotide intermediate containing an abasic site, a strand cleavage, product containing the 3'-terminus, and two products with the 5'-terminus. 8-Oxoguanine was not present in the product HPLC chromatogram, suggesting rearrangement or degradation of this moiety prior to glycosidic bond cleavage. A scheme for the decomposition of 7,8-dihydro-2'-deoxyguanosine-containing oligonucleotides in 28% ammonia solution is presented.
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Affiliation(s)
- M C Torres
- Department of Pharmacological Sciences, State University of New York, Stony Brook 11794-3400, USA
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15
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Reddy DM, Rieger RA, Torres MC, Iden CR. Analysis of synthetic oligodeoxynucleotides containing modified components by electrospray ionization mass spectrometry. Anal Biochem 1994; 220:200-7. [PMID: 7978247 DOI: 10.1006/abio.1994.1319] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Electrospray ionization mass spectrometry (ESI/MS) has been used to confirm the synthesis of oligodeoxynucleotides containing modified structures and to identify products of unstable oligomer degradation. Negative ion mass spectra of oligomers and dimethoxytrityl-protected oligomers exhibited a distribution of multiply charged molecular ions with few adduct ions present. Molecular masses may be determined from the array of peaks with excellent accuracy and serve to corroborate the synthetic sequence and the inclusion of a modified structure within the sequence. Incorporation of modified deoxynucleotides, stable isotopes, and other novel structures such as a terminal biotin moiety and a phosphorothioate linkage can be rapidly verified by ESI/MS. This technique has also proved useful for the identification of products of unstable oligomers formed during synthesis, deprotection, or purification, including the major products formed under basic conditions from 5'-dimethoxytrityl-protected oligomers containing 8-oxo-2'-deoxyguanosine.
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Affiliation(s)
- D M Reddy
- Department of Pharmacological Sciences, School of Medicine, State University of New York at Stony Brook 11794-8651
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16
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Abstract
The effect of administration of diazepam on successive negative contrast in one-way avoidance learning was examined in rats. Contrast was induced by shifting rats from a large reward, 30 s spent in the safe compartment, to a small reward, 1 s spent in the safe compartment. IP administration of 2 mg/kg diazepam eliminated this negative contrast. Moreover, this effect is dose dependent, with doses of 2 and 2.5 mg/kg, but not 0.5 mg/kg, effective in reliably reducing contrast. These results suggest the existence of similar or common underlying mechanisms in both aversive and appetitive contrast effects; they are discussed in light of the current theories of frustrative nonreward and as a mean of studying the behavioral and biological mechanisms of anxiety.
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Affiliation(s)
- A Morales
- Departamento de Psicología Experimental y Fisiología del Comportamiento, Universidad de Granada, España
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17
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Ryan SG, Sherman SL, Terry JC, Sparkes RS, Torres MC, Mackey RW. Startle disease, or hyperekplexia: Response to clonazepam and assignment of the gene (STHE) to chromosome 5q by linkage analysis. Ann Neurol 1992; 31:663-8. [PMID: 1355335 DOI: 10.1002/ana.410310615] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.0] [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: 11/07/2022]
Abstract
Familial startle disease (also known as hyperekplexia and congenital "stiff-man" syndrome) is an autosomal dominant disorder characterized by an exaggerated startle reaction of sudden, unexpected auditory or tactile stimuli; affected neonates also have severe and occasionally fatal hypertonia. We recently encountered a large, five-generation family with startle disease, and treated 16 patients (including 1 neonate) with clonazepam; all experienced dramatic and sustained improvement. We performed systematic linkage analysis in this family, and found tight linkage between the disease locus and a polymorphic genetic marker locus (colony-stimulating factor receptor, or CSF1R) that has been physically mapped to chromosome 5q33-q35. The maximum odds ratio favoring linkage over nonlinkage is greater than 10,000,000:1 (lod score, 7.10) at 3% recombination. Several genes encoding neurotransmitter receptor components have been physically mapped to the subtelomeric region of chromosome 5q, and are thus candidates for the startle disease gene. The availability of additional large pedigrees with startle disease should facilitate identification and characterization of the gene for this disorder.
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Affiliation(s)
- S G Ryan
- Department of Pediatrics (Neurology), University of Texas Health Science Center, San Antonio 78284-7814
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18
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Ryan SG, Wiznitzer M, Hollman C, Torres MC, Szekeresova M, Schneider S. Benign familial neonatal convulsions: evidence for clinical and genetic heterogeneity. Ann Neurol 1991; 29:469-73. [PMID: 1859177 DOI: 10.1002/ana.410290504] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.2] [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: 12/29/2022]
Abstract
The gene for autosomal dominant "benign" familial neonatal convulsions, a transient, primary epilepsy of infancy, has recently been assigned to chromosome 20q. To determine whether this disorder is genetically heterogeneous, we performed linkage analysis in two previously unreported pedigrees with benign familial neonatal convulsions in which clinical heterogeneity was evident. There were 14 affected persons in the first family, and none had seizures (febrile or afebrile) after the age of 2 months. The second family had 13 affected individuals and 2 obligate carriers; seizures frequently did not remit until 6 to 24 months, febrile convulsions occurred in at least 2 patients, apparent audiogenic seizures occurred in 4 patients, and 1 individual had refractory epilepsy until late adolescence. Linkage studies with the chromosome 20 markers D20S19 and D20S20 were performed in both families. The resulting data favored linkage of the disease and marker loci in Family 2 by a maximum odds ratio of 45:1 at 6% recombination. In Family 1, however, the odds were greater than 20,000:1 against linkage at 10% recombination or less. We conclude that the syndrome of benign familial neonatal convulsions is clinically and genetically heterogeneous. Further study will be necessary to clarify the relationship between phenotype and genotype in this disorder.
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Affiliation(s)
- S G Ryan
- Department of Pediatrics, University of Texas Health Science Center, San Antonio 78284
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19
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Bruhn JG, Rogers PJ, Torres MC. A model for a health career information center. J Allied Health 1980; 9:169-75. [PMID: 7429955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A model health career information center was developed and evaluated at a university health science center. One part of the information center is a statewide, toll-free health careers hotline which provides information about health careers to high school and college students, parents, counselors, and teachers, especially in small schools and rural areas, which are not usually included in recruiting circuits. Evaluation of the hotline after one year of operation has indicated that it fills a need, is considered useful by callers, and is of a relatively small cost, considering the geographical coverage. The model information system proposed can be implemented in phases with only slight modifications to meet the unique needs of specific health science centers or their geographical location.
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Arteaga A, Cisternas H, Torres MC, Alliende ME. [Effects of diet changes and use of dextrothyroxine and chlorphenisate on serum lipids]. Rev Med Chil 1969; 97:285-90. [PMID: 5386042] [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: 01/15/2023]
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