Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 387
Filtrar
Más filtros

Tipo del documento
Intervalo de año de publicación
1.
Ultrasound Obstet Gynecol ; 59(3): 377-384, 2022 03.
Artículo en Inglés | MEDLINE | ID: mdl-34405924

RESUMEN

OBJECTIVE: The use of twin-specific vs singleton growth charts in the assessment of twin pregnancy has been controversial. The aim of this study was to assess whether a diagnosis of small-for-gestational age (SGA) made using twin-specific estimated-fetal-weight (EFW) and birth-weight (BW) charts is associated more strongly with adverse neonatal outcomes in twin pregnancies, compared with when the diagnosis is made using singleton charts. METHODS: This was a cohort study of twin pregnancies delivered at St George's Hospital, London, between January 2007 and May 2020. Twin pregnancies complicated by intrauterine death of one or both twins, fetal aneuploidy or major abnormality, twin-twin transfusion syndrome or twin anemia-polycythemia sequence and those delivered before 32 weeks' gestation, were excluded. SGA was defined as EFW or BW below the 10th centile, and was assessed using both twin-specific and singleton EFW and BW charts. The main study outcome was composite adverse neonatal outcome. Mixed-effects logistic regression analysis with random pregnancy-level intercepts was used to test the association between SGA classified using the different charts and adverse neonatal outcome. RESULTS: A total of 1329 twin pregnancies were identified, of which 913 (1826 infants) were included in the analysis. Of these pregnancies, 723 (79.2%) were dichorionic and 190 (20.8%) were monochorionic. Using the singleton charts, 33.3% and 35.7% of pregnancies were classified as SGA based on EFW and BW, respectively. The corresponding values were 5.9% and 5.6% when using the twin-specific charts. Classification as SGA based on EFW using the twin charts was associated significantly with composite adverse neonatal outcome (odds ratio (OR), 4.78 (95% CI, 1.47-14.7); P = 0.007), as compared with classification as appropriate-for-gestational age (AGA). However, classification as SGA based on EFW using the singleton standard was not associated significantly with composite adverse neonatal outcome (OR, 1.36 (95% CI, 0.63-2.88); P = 0.424). Classification as SGA based on EFW using twin-specific standards provided a significantly better model fit than did using the singleton standard (likelihood ratio test, P < 0.001). When twin-specific charts were used, classification as SGA based on BW was associated significantly with a 9.3 times increased odds of composite adverse neonatal outcome (OR, 9.27 (95% CI, 2.86-30.0); P < 0.001). Neonates classified as SGA according to the singleton BW standard but not according to the twin-specific BW standards had a significantly lower rate of composite adverse neonatal outcome than did AGA twins (OR, 0.24 (95% CI, 0.07-0.66); P = 0.009). CONCLUSIONS: The singleton charts classified one-third of twins as SGA, both prenatally and postnatally. Infants classified as SGA according to the twin-specific charts, but not those classified as SGA according to the singleton charts, had a significantly increased risk of adverse neonatal outcome compared with infants classified as AGA. This study provides further evidence that twin-specific charts perform better than do singleton charts in the prediction of adverse neonatal outcome in twin pregnancies. The use of these charts may reduce misclassification of twins as SGA and improve identification of those that are truly growth restricted. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.


Asunto(s)
Enfermedades del Recién Nacido , Embarazo Gemelar , Peso al Nacer , Estudios de Cohortes , Femenino , Retardo del Crecimiento Fetal/diagnóstico , Retardo del Crecimiento Fetal/epidemiología , Peso Fetal , Edad Gestacional , Humanos , Recién Nacido , Recién Nacido Pequeño para la Edad Gestacional , Embarazo , Resultado del Embarazo/epidemiología , Estudios Retrospectivos , Ultrasonografía Prenatal
2.
Morphologie ; 106(354): 195-198, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-33965324

RESUMEN

Jejunum is drained into superior mesenteric vein through a series of jejunal veins. The way in which the first jejunal vein terminates is of great importance in upper abdominal surgery and radiological procedures. Knowledge of its variations is particularly important in surgical procedures like orthotropic hepatic transplantation, hepatic vein reconstruction, pancreatic surgery and surgical procedures of duodenojejunal junction. We saw a first jejunal vein opening directly into the portal vein. Further, the inferior mesenteric vein drained into the first jejunal vein. This case could be useful to gastroenterologists, general surgeons and radiologists.


Asunto(s)
Venas Mesentéricas , Vena Porta , Abdomen , Venas Mesentéricas/diagnóstico por imagen , Venas Mesentéricas/cirugía , Vena Porta/diagnóstico por imagen , Vena Porta/cirugía
3.
Morphologie ; 106(354): 206-208, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34147369

RESUMEN

Gall bladder is known for many congenital anomalies such as duplication, intrahepatic position, floating position etc. Most of its anomalies can be detected in ultrasound examination and radiography. We report an extremely rare congenital anomaly of gall bladder as observed in a male cadaver during dissection classes. The gall bladder was totally enclosed in the right free margin of the lesser omentum, in front of the usual contents of the right free margin of lesser omentum. The size, shape and blood supply of the gall bladder were normal. Though this anomaly might not cause any functional disturbances, it might result in complications during laparoscopic cholecystectomy.


Asunto(s)
Colecistectomía Laparoscópica , Vesícula Biliar , Vesícula Biliar/anomalías , Vesícula Biliar/diagnóstico por imagen , Humanos , Hígado , Masculino , Mesenterio , Epiplón/diagnóstico por imagen
4.
Niger J Clin Pract ; 25(4): 524-530, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35439914

RESUMEN

Background: One of the most important goal of non surgical endodontic retreatment is the successful removal of gutta percha and sealers from the root canal system. A variety of techniques have been recommended for retreatment procedures for the removal of gutta-percha and sealers with or without the help of adjunctive chemical solvents, by using stainless steel hand files or nickel-titanium rotary files, gate glidden burs, heated instruments, ultrasonic instruments, and lasers 1,3. The current advancements in the design of NiTi instruments have proved efficacious in the removal of filling materials from the root canal wall and various studies have also confirmed their cleaning ability and efficacy 4,5. Nevertheless, the use of rotary instrumentation can lead to the formation of dentinal cracks in the root canal dentin. Many researchers have reported the incidence of crack formation and propagation after the procedure with manual, rotary and reciprocating instruments. The behavior of rotary instruments in the generation of defects have been the point of greatest interest during many years 6. These dentinal cracks can be defined as defects with a complete crack line extending from inner root canal space up to the outer surface of the root when the tensile stress in the root canal wall exceeds the tensile stress of dentin 7. Aim: This study was conducted to investigate and to compare the amount of dentinal microcracks formation with various new instrumentation methods and conventional hand filing method. It also looks into amount of gutta-percha removed after retreatment from the canal and the time required for all the instrumentation technique. Methodology: Sixty extracted human maxillary first molars with curved roots were mounted on addition silicone impression material incorporated in an aluminium hollow block, then instrumented using step-back preparation with 35 size K files. Obturation was done using gutta-percha with AH plus sealer. These were stored for 14 days and divided into three groups Mani GPR, Endostar Re Endo and H file and were subjected to retreatment procedures. Retreatment was considered complete when no filling material was observed on the canal wall and the canal was smooth and free of visible debris. The samples were examined under scanning electron microscope and the number of cracks were calculated. The percentage of root canal filling material and time taken was recorded. Statistical Analysis: The data obtained were analyzed by using descriptive statistics, ANOVA (Analysis of Variance), chi-square test and Scheffe's post hoc test through SPSS for window (version 22.0). Result: All the techniques showed similar amount of crack propagation, with no statistical difference between the group. Retreatment done using H Files required more time and removed less material. The coronal third showed less amount of gutta-percha remnants than the apical third in all groups. Conclusion: All the groups showed a similar amount of crack propagation. Less number of cracks were observed in the coronal one third and more amount of cracks were found at the apical third. Endostar RE Endo rotary instrument proved to be most effective and least time-consuming. Hedstrom Files required more time and removed less material.


Asunto(s)
Gutapercha , Materiales de Obturación del Conducto Radicular , Cavidad Pulpar , Humanos , Retratamiento , Obturación del Conducto Radicular/métodos , Preparación del Conducto Radicular/métodos , Solventes , Titanio
5.
Ultrasound Obstet Gynecol ; 58(3): 439-449, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-33538373

RESUMEN

OBJECTIVES: To construct chorionicity-specific birth-weight reference charts for dichorionic diamniotic (DCDA) and monochorionic diamniotic (MCDA) twin pregnancies, incorporating estimated-fetal-weight (EFW) data in order to adjust for the relationship between suboptimal growth and preterm delivery. An additional aim was to determine if the inclusion of complicated twin pregnancies impacts on the reference charts produced. METHODS: The inclusion criteria for this retrospective cohort study were twin pregnancy of known DCDA or MCDA chorionicity, known pregnancy outcome, last ultrasound scan within 14 days before birth and delivery between 25 and 38 weeks' gestation (Analysis A). An analysis was also conducted excluding pregnancies with complications recorded (Analysis B). Previously published twin EFW reference ranges were used in the analysis. A joint statistical model for EFW and observed birth weight for each pregnancy was created in order to estimate population birth-weight reference ranges corresponding to the distribution expected if all pregnancies delivered at any given gestational age. It was not assumed that the median EFW was equal to birth weight for any given gestational age. The models were fitted using a Bayesian approach. RESULTS: We retrieved data on 1664 twin pregnancies, of which 707 DCDA and 241 MCDA pregnancies met the inclusion criteria. In Analysis A, the estimated population median birth weight was similar to the median EFW at around 27 weeks' gestation but fell below the EFW values with increasing gestation, being 156 g lower in both DCDA and MCDA pregnancies at 35 weeks; this finding was confirmed by direct comparison of the last EFW and birth-weight values in each pregnancy. When the analysis was repeated after excluding complicated twin pregnancies (Analysis B), compared with Analysis A, there was very little difference in the median birth-weight results obtained across gestation. The largest absolute difference between Analyses A and B for DCDA twins was at 31, 32 and 33 weeks, with a 9-g lower median birth weight in Analysis A compared with Analysis B. The largest absolute difference for MCDA twins was greater than that for DCDA twins, with a 21-g lower median birth weight at 25 weeks in Analysis A compared with Analysis B. CONCLUSIONS: We have established population chorionicity-specific birth-weight reference charts for DCDA and MCDA twin pregnancies, corresponding to the range expected were all pregnancies to deliver at any given gestational age. In this population of twins, the median birth weight was consistently lower than that reported for singletons, and there was variation in the median birth weight at different gestational ages according to chorionicity. © 2021 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology. - Legal Statement: This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.


Asunto(s)
Peso al Nacer , Corion/embriología , Peso Fetal , Gráficos de Crecimiento , Gemelos/estadística & datos numéricos , Adulto , Teorema de Bayes , Femenino , Desarrollo Fetal , Edad Gestacional , Humanos , Embarazo , Resultado del Embarazo , Embarazo Gemelar , Valores de Referencia , Estudios Retrospectivos
6.
Public Health ; 200: 33-38, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34656815

RESUMEN

OBJECTIVES: COVID-19 continues to cause devastation throughout the world. Various factors influence the perioperative course and prognosis of COVID-19. This study aims to collate the independent prognostic factors among hospitalised COVID-19 patients in east Iran. STUDY DESIGN: In this cohort study, all patients with a confirmed diagnosis of COVID-19 between 19 February 2020 and 1 August 2020 who were admitted to nine public hospitals of South Khorasan province, Iran, were enrolled. METHODS: Univariate analysis (chi-square [χ2], and Mann-Whitney U test) and multiple logistic regression were performed. RESULTS: This study included 1290 participants; 676 patients (52.4%) were male. A total of 1189 (92.2%) recovered, and 101 (7.8%) died. The results show that in-hospital mortality increases with advanced age (the optimal cut-off point = 62 years). The following three variables were shown to have the most significant role in in-hospital mortality: age >60 years (odds ratio [OR] = 8.01, 95% confidence interval [CI] 4.8-13.35), shortness of breath (OR = 2.65, 95% CI: 1.4-69.17) and atypical radiological manifestations in a chest X-ray on admission (OR = 2.16, 95% CI: 1.3-28.64). In the univariate analysis, associated comorbidities, such as cardiovascular diseases, influenced the in-hospital mortality rate, while the same could not be replicated in the multiple variable analysis. CONCLUSIONS: This study revealed the potential predictors of COVID-19 and highlighted the need to be cautious with advanced age and heightened clinical symptoms at the time of admission.


Asunto(s)
COVID-19 , Anciano , Estudios de Cohortes , Mortalidad Hospitalaria , Hospitalización , Humanos , Incidencia , Irán/epidemiología , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Factores de Riesgo , SARS-CoV-2
7.
Kathmandu Univ Med J (KUMJ) ; 19(74): 248-252, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34819445

RESUMEN

Background Thrombocytopenia is a common haematological abnormality noted in clinical practice, however, it can be missed in cases where specific investigations are not asked for. Acute Febrile Illness with thrombocytopenia is a diagnostic and therapeutic challenge, as thrombocytopenia has an inverse relation to mortality and morbidity in various febrile illnesses. Vector-borne and zoonotic diseases (like malaria, dengue, scrub typhus, and leptospirosis), infections and sepsis are some of the common causes of fever with thrombocytopenia. Objective To identify the causes of fever with thrombocytopenia, assess the clinical complications associated with febrile thrombocytopenia, and overall study the clinical profile of thrombocytopenia in a tertiary care hospital Method Medical records of all adult patients, admitted to a tertiary level hospital, with fever and thrombocytopenia (platelet count < 1,00,000 /mm3 ) were assessed (from October 2009 to March 2011). Detailed case history, general physical examination findings, routine and specific examinations were recorded according to a pre-decided format. Data were analysed using SPSS 16.0 Result Acute febrile illness with thrombocytopenia was most commonly seen in Dengue patients. Headache and arthralgia were more commonly encountered in scrub typhus. Platelet transfusions were necessitated in a large number of patients, especially in scrub typhus. Malaria patients had the highest mortality rate. Conclusion Acute Febrile Illnesses (AFI) are of varied origins, and proper diagnosis is imperative. The degree of thrombocytopenia in infections has a prognostic value. It can also help in differential diagnosis and clear identification of aetiology of acute febrile illnesses. Timely identification and management of thrombocytopenia in acute febrile illness can positively impact the overall patient outcome.


Asunto(s)
Dengue , Leptospirosis , Trombocitopenia , Adulto , Dengue/complicaciones , Dengue/diagnóstico , Dengue/epidemiología , Fiebre/diagnóstico , Fiebre/etiología , Humanos , India , Centros de Atención Terciaria , Trombocitopenia/diagnóstico , Trombocitopenia/epidemiología , Trombocitopenia/etiología
8.
Heart Lung Circ ; 29(6): e69-e77, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32471696

RESUMEN

The global coronavirus disease (COVID-19) pandemic poses an unprecedented stress on healthcare systems internationally. These Health system-wide demands call for efficient utilisation of resources at this time in a fair, consistent, ethical and efficient manner would improve our ability to treat patients. Excellent co-operation between hospital units (especially intensive care unit [ICU], emergency department [ED] and cardiology) is critical in ensuring optimal patient outcomes. The purpose of this document is to provide practical guidelines for the effective use of interventional cardiology services in Australia and New Zealand. The document will be updated regularly as new evidence and knowledge is gained with time. Goals Considerations.


Asunto(s)
Betacoronavirus , Consenso , Infecciones por Coronavirus , Cuidados Críticos , Unidades de Cuidados Intensivos , Pandemias , Neumonía Viral , Australia/epidemiología , COVID-19 , Cardiología/normas , Infecciones por Coronavirus/epidemiología , Infecciones por Coronavirus/fisiopatología , Infecciones por Coronavirus/terapia , Humanos , Nueva Zelanda/epidemiología , Neumonía Viral/epidemiología , Neumonía Viral/fisiopatología , Neumonía Viral/terapia , Guías de Práctica Clínica como Asunto , SARS-CoV-2
9.
Colorectal Dis ; 20(6): 502-508, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29205835

RESUMEN

AIM: In the UK Bowel Scope Screening Programme (BSSP), patients progress to colonoscopy based on high-risk features on flexible sigmoidoscopy (FS). We aim to assess the practice of colonoscopy conversion and predictors of detection of additional adenomas on colonoscopy. METHOD: The Bowel Cancer Screening database was interrogated and collated with endoscopic and histological findings from patients undergoing colonoscopy following FS between August 2013 and August 2016. Multivariate analysis was performed to identify predictors of new adenomas. RESULTS: FS was performed on 11 711 patients, with an adenoma detection rate (ADR) of 8.5% and conversion to colonoscopy in 421 (3.6%). The additional ADR at colonoscopy was 35.2%, with one additional malignant diagnosis (0.26%). The adenoma miss rate was 3.6%. On multivariate analysis, a polyp ≥ 10 mm was the only high-risk indication associated with additional ADR at colonoscopy (OR 3.68, 95% CI 1.51-3.65, P < 0.001), in addition to male gender (OR 2.36, 95% CI 1.46-3.83, P < 0.001). Predictors of detection of a new adenoma ≥ 10 mm included: villous adenoma (P = 0.002), polyp ≥ 10 mm (P = 0.007) and male gender (P = 0.039). The presence of any conversion criterion was associated with the detection of any proximal adenoma (P < 0.001) and adenoma ≥ 10 mm (P = 0.031). CONCLUSION: Male gender, polyps ≥ 10 mm and villous-preponderant histology at FS were predictors of adenomas < 10 mm and ≥ 10 mm at colonoscopy. Further data are required to assess the role for gender-based stratification of conversion criteria.


Asunto(s)
Adenoma/diagnóstico , Carcinoma/diagnóstico , Pólipos del Colon/diagnóstico , Colonoscopía , Neoplasias Colorrectales/diagnóstico , Errores Diagnósticos/estadística & datos numéricos , Sigmoidoscopía , Adenoma/patología , Adenoma Velloso/diagnóstico , Adenoma Velloso/patología , Carcinoma/patología , Pólipos del Colon/patología , Neoplasias Colorrectales/patología , Detección Precoz del Cáncer , Femenino , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Oportunidad Relativa , Factores Sexuales , Carga Tumoral , Reino Unido
10.
Kathmandu Univ Med J (KUMJ) ; 16(64): 345-347, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-31729351

RESUMEN

Celiac trunk is the first ventral branch of the abdominal aorta. It usually terminates by giving three branches; the common hepatic artery, the left gastric artery and the splenic artery. We report a rare variation of the branching pattern of the celiac trunk. The Celiac trunk divided into two branches; left gastric artery and splenicogastroduodenal trunk. The splenico-gastroduodenal trunk divided into splenic and gastroduodenal arteries. The superior mesenteric artery and hepatic artery took origin from a common hepato-mesenteric trunk. The hepatic artery had a winding course around the portal vein and hepatic duct. The knowledge of these variations is important while doing radiological investigations and liver transplant and pancreatic surgeries.


Asunto(s)
Arteria Celíaca/anatomía & histología , Arteria Mesentérica Superior/anatomía & histología , Mesenterio/irrigación sanguínea , Bazo/irrigación sanguínea , Adulto , Cadáver , Arteria Hepática/anatomía & histología , Humanos , Masculino
11.
Ceylon Med J ; 62(3): 184-188, 2017 09 30.
Artículo en Inglés | MEDLINE | ID: mdl-29076713

RESUMEN

Introduction: The dietary habits of children expose the oral cavity to challenging environments. A durable interface between the restorative material and tooth surface is essential to ensure marginal integrity thereby contributing to the longevity of restoration. Objectives: The objective of this study was to compare the micro-leakage of two newer glass ionomer cements (SDI Riva Self Cure GIC and GC Fuji IX GP EXTRA) in primary molars immersed in sugarcane juice, chocolate milk and mango drink. Methods: The study included 60 extracted non carious upper and lower primary molars. The buccal and lingual surfaces were restored with SDI Riva Self Cure GIC and GC Fuji IX GP EXTRA respectively. The sample was divided into three groups (chocolate milk, mango drink, sugarcane juice). Each group (n=18) was further subdivided into three subgroups based on the immersion regime. Six teeth were kept as control. The teeth were immersed in Rhodamine B dye. Following this, micro-leakage was determined under 40 x stereomicroscope. Results: Both the materials showed micro leakage when immersed in the three beverages. When specimen under each group were compared, the microleakage score increased with an increase in immersion frequency. This was not statistically significant. The microleakage values for both the materials immersed in the three beverages were not significant. Conclusions: Both the materials used in this study can be conveniently used in restoration of primary molars.

12.
13.
Diabet Med ; 33(12): 1700-1704, 2016 12.
Artículo en Inglés | MEDLINE | ID: mdl-26773871

RESUMEN

AIM: To investigate whether the effectiveness of lifestyle interventions on the incidence of diabetes was influenced by the baseline age and BMI of the Asian-Indian participants with prediabetes. METHODS: Pooled data, obtained from two of our Indian Diabetes Prevention Programmes (2006, n=236 and 2013, n=473; total N=709) which had similar baseline characteristics and intervention principles, were analysed. For the present secondary analysis we dichotomously categorized the participants' baseline age (<45 and ≥45 years) and BMI (<25.0 and ≥ 25.0 kg/m2 ). Glycaemic status was ascertained at 6-monthly intervals by oral glucose tolerance tests. The incidence rates of diabetes and relative risk reduction in both the intervention and the control group were calculated for categories of baseline age and BMI. Interactions between the intervention and baseline age and BMI on diabetes risk were also analysed. RESULTS: Incident diabetes was diagnosed in 227 of the total 709 participants (32.0%) [control group 139 participants (38.8%) vs intervention group 88 participants (24.2%)] during the median follow-up period of 2 years. The overall relative risk reduction was 35.4% (95% CI 19.3-48.3). Lifestyle intervention was equally effective in both age groups [relative risk reduction in those aged <45 years: 43.7% (95% CI 19.8-60.5) and in those aged ≥ 45 years: 28.9% (95% CI 5.3-46.6) P for interaction = 0.52] and in categories of BMI [BMI <25 kg/m2 : 36.1% (95% CI 9.5-54.9); and BMI ≥ 25 kg/m2 : 34.8% (95% CI 12.9-51.2); P for interaction = 0.95]. CONCLUSIONS: In Asian-Indian individuals with prediabetes, the effectiveness of lifestyle intervention was not modified by baseline age and BMI.


Asunto(s)
Diabetes Mellitus Tipo 2/prevención & control , Estilo de Vida Saludable/fisiología , Adulto , Asia/etnología , Índice de Masa Corporal , Diabetes Mellitus Tipo 2/etnología , Femenino , Intolerancia a la Glucosa/etnología , Intolerancia a la Glucosa/prevención & control , Humanos , India/etnología , Masculino , Persona de Mediana Edad , Estado Prediabético/etnología , Estado Prediabético/prevención & control , Prevención Primaria , Estudios Prospectivos
14.
Haemophilia ; 22(4): 570-82, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27291889

RESUMEN

INTRODUCTION: Inherited macrothrombocytopenia represents a heterogeneous group of disorders which are characterized by the presence of a reduced number of abnormally large platelets in the circulation, which may or may not be associated with a bleeding tendency. In spite of several causative genes having been identified, the underlying genetic defects remain to be identified in approximately half of the cases. AIMS: To understand the molecular pathology of isolated giant platelet disorder from India. MATERIALS AND METHODS: We studied 112 cases that were referred for investigation of macrothrombocytopenia. Agonist induced platelet aggregation and platelet GP1b/IX/V receptor expression were investigated to assess GP1b/IX/V receptor expression and the GP1BA, GP1BB, GP9, ABCG5, ABCG8, TUBB1 and MYH9 genes were analysed to identify candidate gene defects. RESULTS: Twenty-three candidate gene defects were identified in 48 of 112 cases, 20 of which were novel. Of the candidate defects identified, 91% were missense and 9% were nonsense variations. The missense variations were in GP9 (9), ABCG5 (4), GP1BB (3), GP1BA (3) and MYH9 (2), while the nonsense defects occurred in MYH9 (1) and GP1BA (1). CONCLUSIONS: This study increases the understanding of the molecular basis of an isolated giant platelet disorder, a common heterogeneous condition prevalent in north and eastern India.


Asunto(s)
Enfermedades Genéticas Ligadas al Cromosoma X/diagnóstico , Complejo GPIb-IX de Glicoproteína Plaquetaria/metabolismo , Trombocitopenia/diagnóstico , Transportador de Casetes de Unión a ATP, Subfamilia G, Miembro 5/genética , Adolescente , Adulto , Anciano , Pruebas de Coagulación Sanguínea , Plaquetas/citología , Plaquetas/metabolismo , Niño , Codón sin Sentido , Femenino , Estudios de Asociación Genética , Enfermedades Genéticas Ligadas al Cromosoma X/genética , Genotipo , Hemorragia/etiología , Heterocigoto , Humanos , India , Lipoproteínas/genética , Masculino , Persona de Mediana Edad , Proteínas Motoras Moleculares/genética , Mutación Missense , Cadenas Pesadas de Miosina/genética , Fenotipo , Complejo GPIb-IX de Glicoproteína Plaquetaria/genética , Polimorfismo de Nucleótido Simple , Trombocitopenia/congénito , Trombocitopenia/genética , Adulto Joven
15.
Nano Lett ; 15(4): 2391-5, 2015 Apr 08.
Artículo en Inglés | MEDLINE | ID: mdl-25793915

RESUMEN

The piezoelectronic transistor (PET) has been proposed as a transduction device not subject to the voltage limits of field-effect transistors. The PET transduces voltage to stress, activating a facile insulator-metal transition, thereby achieving multigigahertz switching speeds, as predicted by modeling, at lower power than the comparable generation field effect transistor (FET). Here, the fabrication and measurement of the first physical PET devices are reported, showing both on/off switching and cycling. The results demonstrate the realization of a stress-based transduction principle, representing the early steps on a developmental pathway to PET technology with potential to contribute to the IT industry.

16.
Indian J Lepr ; 88(3): 177-83, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-30207442

RESUMEN

Cutaneous sarcoidosis may occasionally be mistaken and treated for leprosy. We present two cases of sarcoidosis of the skin which were initially treated as leprosy based on the histopathological features. Histological study in one patient showed perineural and perivascular granuloma adding on to the diagnostic confusion. It is very important for the clinicians to consider sarcoidosis as a possible diagnosis in a patient with clinical features that are not typical of leprosy. Histopathology along with appropriate in -situ techniques can help in arriving at an appropriate diagnosis.


Asunto(s)
Errores Diagnósticos , Lepra/diagnóstico , Lepra/patología , Sarcoidosis/diagnóstico , Sarcoidosis/patología , Adulto , Humanos , Masculino , Persona de Mediana Edad , Piel/patología
17.
West Indian Med J ; 65(2): 383-388, 2016 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-28358444

RESUMEN

Cancer is one of the leading causes of death across the world. Oral cancer is the sixth most common type of cancer in the world. The incidence of oral cancer increases with the increase in the consumption of carcinogens such as tobacco and alcohol as seen in south and southeast Asia. Oral cancer is seen to arise from pre-existing leukoplakia and oral submucous fibrosis. Antioxidants have been hypothesized to be chemopreventive agents for several cancers. Micronutrients such as zinc, copper and selenium, along with antioxidants are required for the production of various enzymes that help prevent DNA damage caused by free radicals.

18.
Gut ; 64(7): 1120-31, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24902765

RESUMEN

BACKGROUND: Chronic liver injury triggers a progenitor cell repair response, and liver fibrosis occurs when repair becomes deregulated. Previously, we reported that reactivation of the hedgehog pathway promotes fibrogenic liver repair. Osteopontin (OPN) is a hedgehog-target, and a cytokine that is highly upregulated in fibrotic tissues, and regulates stem-cell fate. Thus, we hypothesised that OPN may modulate liver progenitor cell response, and thereby, modulate fibrotic outcomes. We further evaluated the impact of OPN-neutralisation on murine liver fibrosis. METHODS: Liver progenitors (603B and bipotential mouse oval liver) were treated with OPN-neutralising aptamers in the presence or absence of transforming growth factor (TGF)-ß, to determine if (and how) OPN modulates liver progenitor function. Effects of OPN-neutralisation (using OPN-aptamers or OPN-neutralising antibodies) on liver progenitor cell response and fibrogenesis were assessed in three models of liver fibrosis (carbon tetrachloride, methionine-choline deficient diet, 3,5,-diethoxycarbonyl-1,4-dihydrocollidine diet) by quantitative real time (qRT) PCR, Sirius-Red staining, hydroxyproline assay, and semiquantitative double-immunohistochemistry. Finally, OPN expression and liver progenitor response were corroborated in liver tissues obtained from patients with chronic liver disease. RESULTS: OPN is overexpressed by liver progenitors in humans and mice. In cultured progenitors, OPN enhances viability and wound healing by modulating TGF-ß signalling. In vivo, OPN-neutralisation attenuates the liver progenitor cell response, reverses epithelial-mesenchymal-transition in Sox9+ cells, and abrogates liver fibrogenesis. CONCLUSIONS: OPN upregulation during liver injury is a conserved repair response, and influences liver progenitor cell function. OPN-neutralisation abrogates the liver progenitor cell response and fibrogenesis in mouse models of liver fibrosis.


Asunto(s)
Cirrosis Hepática/metabolismo , Osteopontina/metabolismo , Células Madre/metabolismo , Animales , Progresión de la Enfermedad , Regulación hacia Abajo/fisiología , Inmunohistoquímica , Hígado/patología , Cirrosis Hepática/patología , Ratones Endogámicos C57BL , Factor de Transcripción SOX9/metabolismo , Factor de Crecimiento Transformador beta/fisiología , Regulación hacia Arriba/fisiología , Cicatrización de Heridas/fisiología
19.
Haemophilia ; 21(2): 152-161, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25521966

RESUMEN

The major therapy for haemophilia is plasma derived or recombinant clotting factors which are evolving steadily to increase potency, stability and half-life. Research in the area of haemophilia therapeutics, however, is not restricted only to modifications in the recombinant products, but alternate therapeutic strategies are being developed which are in different phases of experimental and clinical trials. This chapter reviews the diverse molecular innovations which are being developed for alternate therapeutic approaches in haemophilia. The data is mainly extracted from the literature and the Conference abstracts. Some of the novel therapeutic approaches include inhibition of anticoagulant pathway factors (activated protein C, antithrombin, tissue factor pathway inhibitor) by monoclonal antibodies, peptide inhibitors, DNA or RNA aptamers, use of variant coagulation factors (factor Xa, factor Va) which are more resistant to inactivation or enzymatically more active and antibody-mediated therapy including a humanized anti-factor IXa/X bispecific antibody mimicking factor VIII. Other approaches include nonsense mutation suppression, induction of prothrombotic microparticles by P-selectin-immunoglobulin chimeras, suppression of fibrinolytic potential either by antifibrinolytics or by the use of mutant molecules of fibrinolytic inhibitors. Few products are proposed as 'stand alone' treatment for haemophilia, while a few can be used as adjuvant therapies to recombinant factors with an aim to reduce the amount of factor intake. All efforts are underway to produce an alternate, novel drug for haemophilia which will have an increased half-life, subcutaneously injectable, non-immunogenic and effective both in the presence and absence of inhibitors.


Asunto(s)
Hemofilia A/terapia , Hemofilia B/terapia , Hemofilia A/genética , Hemofilia B/genética , Humanos
20.
West Indian Med J ; 64(3): 279-82, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-26426184

RESUMEN

Anticonvulsants, antihypertensive calcium channel blockers and immunosuppressants are the three main classes of drugs known to cause drug-induced gingival hypertrophy or hyperplasia. Among the calcium channel blockers, nifedipine administration has most frequently been associated with medication-related gingival hyperplasia. The incidence with amlodipine, which has a mode of action pharmacodynamically comparable to nifedipine, has rarely been reported. Here, we present a rare case of amlodipine-induced gingival hyperplasia in a hypertensive patient.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA