La concentración de óxido nítrico en suero de pacientes con periodontitis agresiva y crónica generalizada no está relacionada con la severidad de la enfermedad

Introduction: Periodontitis is an inflammatory disease that affects the supporting tissues of teeth, the effects of excess of nitric oxide, may contribute to the symptoms of periodontitis. Objective: Determine the serum nitric oxide concentration in generalized chronic and aggressive periodontitis patients and to compare it with a healthy subjects group from the Mexican population. Materials and methods: A case and control study was performed. Sixty-nine individuals were included from the Postgraduate Periodontology Clinic of the University Center of Health Sciences, the University of Guadalajara, Mexico. Patients with clinical features of generalized chronic periodontitis (GCP group n=19), generalized aggressive periodontitis (GAP group n=11), and a group of healthy subjects (HS=39) were included in the study. Informed consent was obtained from each subject, and serum nitric oxide concentration was measured by an enzyme-linked immunosorbent assay. Results: Nitric oxide concentration in the study groups was greater in the GCP group (462.57 µmol/L ± 16.57 µmol/L) than in the GAP group (433.84 µmol/L ± 18.61 µmol/L) and the HS group (422.46 µmol/L ± 12.07 µmol/L). A comparison using Student’s t-test (one-tailed) between healthy subjects and generalized chronic periodontitis showed borderline significance (p<0.04), whereas no significant differences were observed in HS and GAP groups, with a p-value of 0.64, and the GAP vs. GCP p-value was 0.33. Conclusion: The serum nitric oxide concentration observed in the present study suggests that nitric oxide plays a major role in the inflammatory process, which cannot necessarily be linked to the severity of the disease and periodontal tissue destruction.Introducción. La periodontitis es una enfermedad inflamatoria que afecta los tejidos de soporte dental, los efectos del exceso de óxido nítrico, pueden contribuir a los síntomas de la periodontitis.Objetivo. Determinar la concentración de óxido nítrico en suero de pacientes con periodontitis agresiva y crónica generalizada y compararlas con individuos sanos de población mexicana.Materiales y métodos. Estudio de casos y controles. Se incluyeron 69 individuos de la Clínica de Posgrado de Periodoncia del Centro Universitario de Ciencias de la Salud de la Universidad de Guadalajara. Se dividieron en tres grupos. Pacientes con periodontitis crónica generalizada (GCP n=19), Pacientes con periodontitis agresiva generalizada (GAP n=11) e Individuos sanos periodontalmente (HS n=39). Se obtuvo consentimiento informado de todos los participantes. Se realizó ensayo de ELISA para medir la concentración de óxido nítrico en suero.Resultados. Las concentraciones de óxido nítrico observadas fueron mayores en el grupo GCP (462.57 µmol/L ± 16.57 µmol/L) que en los grupos GAP (433.84 µmol/L ± 18.61 µmol/L) y HS (422.46 µmol/L ± 12.07 µmol/L). La comparación entre HS y GCP mediante la prueba estadística T de Student (una cola), mostró diferencias significativas (p<0.04), y no se observaron diferencias entre los grupos HS y GAP (p=0.64) y GAP contra GCP (p=0.33).Conclusiones. La concentración de óxido nítrico en suero, observada en el presente estudio, sugiere que el óxido nítrico desempeña un importante papel en el proceso inflamatorio, lo que, no necesariamente está ligado a la severidad de la enfermedad y a la destrucción del tejido periodontal

La era de la transformación digital de las organizaciones y su impacto en la competitividad

En un esfuerzo desarrollado por distintos autores y grupos de investigación para explorar diversos aspectos asociados al nuevo contexto que plantean la era digital, el termino cuarta revolución industrial o revolución 4.0 ha empezado a ser utilizado con frecuencia para denominar un proceso que tal como menciona Klaus Schwab (2016) se diferencia de la tercera revolución industrial o revolución digital iniciada en los años 80 del siglo XX, por tres elementos: velocidad (crecimiento exponencial), amplitud y profundidad (no solo está cambiando el qué y el cómo, sino también el quiénes) y el impacto en los sistemas (transformación en los sistemas productivos, sociales, empresariales). Para la academia es un reto comprender de manera acertada las transformaciones que se plantean en distintos escenarios como resultado del proceso en mención, con el objetivo de realizar aportes conceptuales, teóricos y prácticos útiles para los distintos actores interesados en identificar oportunidades y prever los desafíos de la revolución 4.0. Este libro recoge el resultado de dichas investigaciones. Debido a la riqueza y variedad en las temáticas, estos trabajos se pueden agrupar en cuatro grandes áreas: aportes académicos y al conocimiento; nuevas tecnologías; competitividad, y tendencias del mercadeo. (apartes del texto)Contiene: Capítulo 1. Gestión tecnológica: Fundamentos teóricos que facilitan su desarrollo y la medición en la empresa / Yiset Lorena Alvarado Peña, Melva Inés Gómez Caicedo -- Capítulo 2. Innovación, tecnológica robótica e inteligencia artificial marcan la educación y a los profesiones del futuro / Luz Eneida Moreno -- Capítulo 3. Brecha entre la industria y la academia / Iván Darío Ladino Vega, Jairo Ignacio Rodríguez Osorno, Walder de Jesús Casanova García -- Capítulo 4. Un chatbot como herramienta de apoyo al reclutamiento de personal en las empresas / Cecilia Ávila, Nicolas Vaca, Yeimy Roa -- Capítulo 5. Predicción de la satisfacción de los clientes de restaurantes mediante inteligencia artificial (IA) / Teresa Amanda Chávez de Menesses, María Andreína Moros Ochoa, Jenny-Paola Lis-Gutiérrez, Gilmer Yovanni Castro Nieto, Cristhian Salinas-Ortegón -- Capítulo 6. Determinantes de la competitividad en Colombia: ¿De las exportaciones tradicionales de commodities a bienes manufacturados? / Irma Liliana Vásquez Merchán -- Capítulo 7. Las redes sociales en la promoción de destinos de bienestar, una mirada al termalismo / Julia Rodas Quintero, Sandra Patricia Cote Daza, Jesús Alexis Barón Chivara -- Capítulo 8. Derechos de autor en el escenario de la revolución 4.0: ¿Cuánto saben los bogotanos? / Cristhian Salinas Ortegón, Jenny Paola Lis Gutiérrez, Mercedes Gaitán Angulo, Teresa Amanda Chávez de Menesses -- Capítulo 9. Sistema experto basado en reglas para la selección, evaluación y diagnóstico de iniciativas de innovación social (IS) / Jenny Cubillos Díaz, Anderson Quintero, Jenny Paola Lis Gutiérrez -- Capítulo 10. Identificación de los factores que inciden en las proyecciones financieras de las organizaciones floricultoras de Cundinamarca / Vladimir Camacho Cuineme -- Capítulo 11. Desempeño en servicios intensivos en conocimiento: un análisis de su comportamiento en países latinoamericanos / Diana Geraldine Jiménez García, Oscar Fernando Castellanos Domínguez.Fundación Universitaria Los Libertadore

A survey of the clinicopathological and molecular characteristics of patients with suspected Lynch syndrome in Latin America

Background: Genetic counselling and testing for Lynch syndrome (LS) have recently been introduced in several Latin America countries. We aimed to characterize the clinical, molecular and mismatch repair (MMR) variants spectrum of patients with suspected LS in Latin America. Methods: Eleven LS hereditary cancer registries and 34 published LS databases were used to identify unrelated families that fulfilled the Amsterdam II (AMSII) criteria and/or the Bethesda guidelines or suggestive of a dominant colorectal (CRC) inheritance syndrome. Results: We performed a thorough investigation of 15 countries and identified 6 countries where germline genetic testing for LS is available and 3 countries where tumor testing is used in the LS diagnosis. The spectrum of pathogenic MMR variants included MLH1 up to 54%, MSH2 up to 43%, MSH6 up to 10%, PMS2 up to 3% and EPCAM up to 0.8%. The Latin America MMR spectrum is broad with a total of 220 different variants which 80% were private and 20% were recurrent. Frequent regions included exons 11 of MLH1 (15%), exon 3 and 7 of MSH2 (17 and 15%, respectively), exon 4 of MSH6 (65%), exons 11 and 13 of PMS2 (31% and 23%, respectively). Sixteen international founder variants in MLH1, MSH2 and MSH6 were identified and 41 (19%) variants have not previously been reported, thus representing novel genetic variants in the MMR genes. The AMSII criteria was the most used clinical criteria to identify pathogenic MMR carriers although microsatellite instability, immunohistochemistry and family history are still the primary methods in several countries where no genetic testing for LS is available yet. Conclusion: The Latin America LS pathogenic MMR variants spectrum included new variants, frequently altered genetic regions and potential founder effects, emphasizing the relevance implementing Lynch syndrome genetic testing and counseling in all of Latin America countries.Radium Hospital Foundation (Oslo, Norway) in the design of the study and collection, analysis, and interpretation of data and in writing the manuscript, Helse Sør-Øst (Norway) in the design of the study and collection, analysis, and interpretation of data and in writing the manuscript, the French Association Recherche contre le Cancer (ARC) in the analysis, and interpretation of data, the Groupement des Entreprises Françaises dans la Lutte contre le Cancer (Gefluc) in the analysis, and interpretation of data, the Association Nationale de la Recherche et de la Technologie (ANRT, CIFRE PhD fellowship to H.T.) in the analysis, and interpretation of data and by the OpenHealth Institute in the analysis, and interpretation of data. Barretos Cancer Hospital received financial support by FINEP-CT-INFRA (02/2010)info:eu-repo/semantics/publishedVersio

MDR1 C3435T Polymorphism in Mexican Children with Acute Lymphoblastic Leukemia and in Healthy Individuals

To determine the influence of the MDR1 C3435T polymorphism on the development of childhood acute lymphoblastic leukemia (ALL), we studied 107 children with ALL and 111 healthy subjects. All subjects were genotyped for the C3435T polymorphism using the polymerase chain reaction–restriction fragment length polymorphism method. The genotype frequencies in the patients were 17% homozygous CC, 61% heterozygous CT, and 22% homozygous TT; in healthy individuals the genotype frequencies were 14% CC, 53% CT, and 33% TT. In patients with ALL the allele frequencies were 0.47 for the C allele and 0.53 for the T allele; in the healthy group these allele frequencies were 0.40 and 0.60 for the C and T alleles, respectively. No significant differences in allele frequency (p \u3e 0.176) and genotype frequency (p \u3e 0.255) were detected between the two groups. These findings suggest that the CT or TT genotype does not increase the risk for childhood ALL in Mexican patients. On the other hand, significant differences in allele frequencies were detected in the comparison of Mexican healthy subjects with other populations. Whether these differences are fortuitous or related to diverse genetic backgrounds remains to be elucidated

46,XX ovotesticular disorder in a Mexican patient with Beckwith–Wiedemann syndrome: a case report

Abstract Introduction Beckwith–Wiedemann syndrome is an overgrowth syndrome that is characterized by hypoglycemia at birth, coarse face, hemihypertrophy and an increased risk to develop embryonal tumors. In approximately 15% of patients, the inheritance is autosomal dominant with variable expressivity and incomplete penetrance, whereas the remainder of Beckwith–Wiedemann syndrome cases are sporadic. Beckwith–Wiedemann syndrome molecular etiologies are complex and involve the two imprinting centers 1 (IC1) and 2 (IC2) of 11p15 region. This case report describes, for the first time, the unusual association of ovotesticular disorder in a patient from Morelia, Mexico with Wiedemann-Beckwith syndrome. Case presentation We report the case of a Mexican six-year-old girl with Beckwith–Wiedemann Syndrome, ambiguous genitalia, and bilateral ovotestes. She has a 46,XX karyotype without evidence of Y-chromosome sequences detected by fluorescence in situ hybridization with both SRY and wcp-Y probes. Conclusion Although a random association between these two conditions cannot be excluded, future analysis of this patient with Beckwith–Wiedemann syndrome and 46,XX ovotesticular disorder may lead to new insights into these complex pathologies. We speculate that a possible misregulation in the imprinted genes network has a fundamental role in the coexistence of these two disorders.</p