Biology-oriented development of novel lipophilic antioxidants with neuroprotective activity

Discovery of hydroxycinnamic acid derivatives with enhanced in lipophilicity, blood brain barrier permeability and neuroprotective potential.

[SEIP-SERPE-SEOP Consensus document on the treatment of uncomplicated acute osteomyelitis and septic arthritis]

This is a Consensus Document of the Spanish Society of Paediatric Infectious Diseases (Sociedad Española de Infectología Pediatrica), Spanish Society of Paediatric Rheumatology (Sociedad Española de Reumatología Pediátrica) and the Spanish Society of Paediatric Orthopaedics (Sociedad Española de Ortopedia Pediátrica), on the treatment of uncomplicated acute osteomyelitis and septic arthritis. A review is presented on the medical and surgical treatment of acute osteoarticular infection, defined as a process with less than 14 days of symptomatology, uncomplicated and community-acquired. The different possible options are evaluated based on the best available scientific knowledge, and a number of evidence-based recommendations for clinical practice are provided.

Aplicación clínica de la técnica percutánea en la tenosinovitis estenosante de los flexores de la mano

Introducción: La tenosinovitis estenosante de los flexores de la mano es una patología que conduce al bloqueo de la polea de flexión proximal del dedo. Aunque el tratamiento inicial es conservador, si éste no es efectivo, está indicado el tratamiento quirúrgico mediante liberación abierta o percutánea.

Material y método: Estudio descriptivo retrospectivo de 116 pacientes intervenidos de dedo en resorte en el HCUV (enero 2005- diciembre 2007), seguimiento medio 36 meses. Análisis de datos con el 91% de los pacientes (105 pacientes) con un total de 182 dedos afectos realizando comparación de ambas técnicas.

Resultados: Edad media varones 53.70 años y la de las mujeres 53.95. El 34% de las manos intervenidas no presentan otras patologías asociadas. Primer dedo más afectado, seguido del tercero y cuarto. Se realizó técnica percutánea en el 42% de los pacientes, abierta en el 53% y ambas en el 5% del total. Destacan los problemas con la cicatriz en la tenolisis abierta. Técnica percutánea permite reincorporación a la vida laboral 8 días antes.

Discusión: La liberación percutánea de la polea AI es una alternativa a la liberación abierta por su bajo coste y por permitir una rápida reincorporación del paciente a su vida laboral. Gracias a estudios experimentales en cadáver, se obtienen referencias topográficas que aportan mayor seguridad, permitiendo ampliar el uso de esta técnica que ha demostrado grandes ventajas en el ámbito socio-económico y laboral.

Estudio a largo plazo (más de 10 años de evolución), de las complicaciones de las artroplastias trapecio-metacarpianas de tipo ARPE®

Objetivo: La artrosis trapecio-metacarpiana es una patología incapacitante, que produce dolor, disminución de la fuerza, pérdida de destreza en la pinza y limitación de la movilidad del pulgar. Cuando fracasa el tratamiento médico se pueden realizar diferentes técnicas quirúrgicas. Las prótesis totales de la articulación representan una de ellas. Desde mayo de 1999 hasta abril de 2004 se realizaron, de forma consecutiva, un total de 116 prótesis totales de la articulación trapecio-metacarpiana en 103 pacientes que padecían artrosis, utilizando la prótesis no cementada y no constreñida tipo ARPE® (Biomet Spain Orthopaedics SL, Valencia). Se presentan en este estudio los resultados de la revisión clínica, funcional y radiológica de los pacientes revisados durante 10 años de evolución.

Material y Método: Los análisis de supervivencia fueron realizados mediante el método de Kaplan-Meier. De los 103 pacientes, 6 fueron excluidos y 97 pacientes, con 109 prótesis acabaron el estudio.

Resultados: En la revisión de los 10 años de evolución, 102 (93,6%) eran prótesis funcionales y 7 (6,4%) prótesis eran consideradas prótesis fallidas (3 retiradas por aflojamiento, 3 luxaciones y 1 subluxación y dolor). La probabilidad de supervivencia de Kaplan–Meier fue de 94.1% [CI95% (90.4%,98.8%)]. Radiográficamente, 88 (86,3%) de las prótesis consideradas funcionales no mostraron evidencia de alteraciones del implante y 14 (13,7%) mostraron cambios radio gráficos que eran compatibles con la funcionalidad del implante. Se presenta en detalle el estudio de las complicaciones que han existido, con las posibles soluciones en las cirugías de revisión.

Conclusión: La prótesis total de ARPE® ofrece una alternativa de tratamiento segura y fiable en pacientes con artrosis trapecio-metacarpiana grado III y algunos de grado IV con buen capital óseo, sobre todo, en el trapecio. La mayoría de las complicaciones aparecen por defectos de indicación o por defectos de la técnica quirúrgica y se pueden resolver con recambio protésico o con trapecectomía dependiendo de las circunstancias del implante y del paciente.

Computational NMR coupling constants: shifting and scaling factors for evaluating 1JCH

Optimized shifting and/or scaling factors for calculating one-bond carbon-hydrogen spin-spin coupling constants have been determined for 35 combinations of representative functionals (PBE, B3LYP, B3P86, B97-2 and M06-L) and basis sets (TZVP, HIII-su3, EPR-III, aug-cc-pVTZ-J, ccJ-pVDZ, ccJ-pVTZ, ccJ-pVQZ, pcJ-2 and pcJ-3) using 68 organic molecular systems with 88 (1)JCH couplings including different types of hybridized carbon atoms. Density functional theory assessment for the determination of (1)JCH coupling constants is examined, comparing the computed and experimental values. The use of shifting constants for obtaining the calculated coupling improves substantially the results, and most models become qualitatively similar. Thus, for the whole set of couplings and for all approaches excluding those using the M06 functional, the root-mean-square deviations lie between 4.7 and 16.4 Hz and are reduced to 4-6.5 Hz when shifting constants are considered. Alternatively, when a specific rovibrational contribution of 5 Hz is subtracted from the experimental values, good results are obtained with PBE, B3P86 and B97-2 functionals in combination with HIII-su3, aug-cc-pVTZ-J and pcJ-2 basis sets.

Effect of lairage time ( 0h, 3 h, 6 h or 12 h) on glycogen content and meat quality parameters in suckling lambs

The effect of slaughter at arrival (L0) or after 3 (L3), 6 (L6), 12 (L12) h of lairage on carcass and meat quality of suckling lambs has been studied. Lairage time had a slight effect on carcass quality traits, but most of the meat quality parameters at 24h post mortem were affected. Weight losses increased and glycogen content of liver and longissimus muscle decreased as lairage time increased. Longissimus muscle from L3 lambs had the highest pH, shear force and toughness and the lowest b* and C* values, at 24h post mortem. L3 and L6 had the higher proportion of expelled juice, or low water holding capacity (WHC), at 24h post mortem. Texture parameters and WHC were similar among groups after 5 days of storage. Despite the fact that the effects of lairage time on meat quality disappears after storage, from the point of view of weight losses the slaughter of suckling lambs at arrival is recommended.

Molecular epidemiology of enterovirus 71, coxsackievirus A16 and A6 associated with hand, foot and mouth disease in Spain

Hand, foot and mouth disease (HFMD) is a childhood illness frequently caused by genotypes belonging to the enterovirus A species, including coxsackievirus (CV)-A16 and enterovirus (EV)-71. Between 2010 and 2012, several outbreaks and sporadic cases of HFMD occurred in different regions of Spain. The objective of the present study was to describe the enterovirus epidemiology associated with HFMD in the country. A total of 80 patients with HFMD or atypical rash were included. Detection and typing of the enteroviruses were performed directly in clinical samples using molecular methods. Enteroviruses were detected in 53 of the patients (66%). CV-A6 was the most frequent genotype, followed by CV-A16 and EV-71, but other minority types were also identified. Interestingly, during almost all of 2010, CV-A16 was the only causative agent of HFMD but by the end of the year and during 2011, CV-A6 became predominant, while CV-A16 was not detected. In 2012, however, both CV-A6 and CV-A16 circulated. EV-71 was associated with HFMD symptoms only in three cases during 2012. All Spanish CV-A6 sequences segregated into one major genetic cluster together with other European and Asian strains isolated between 2008 and 2011, most forming a particular clade. Spanish EV-71 strains belonged to subgenogroup C2, as did most of the European sequences circulated. In conclusion, the recent increase of HFMD cases in Spain and other European countries has been due to a larger incidence of circulating species A enteroviruses, mainly CV-A6 and CV-A16, and the emergence of new genetic variants of these viruses.

Physico-chemical characteristics of carcass and meat Manchego-breed suckling lambs slaughtered at different weights

Forty-nine Manchego-breed lambs raised exclusively on their dams' milk until slaughter were used in this study. The effects of gender and slaughter weight (10, 12 and 14 kg) on carcass fatness, meat quality and the fatty acid composition of their fat were studied. Fatness, and in particular dorsal-fat thickness (P⩽0.01), increased with live weight. The effect of gender was even greater (P⩽0.001), as female lambs presented the highest fatness values for all parameters studied. The smallest drop in m. longissimus pH values was seen in the lowest-weight (10 kg) lambs. These same lambs displayed the highest L* value and thus the lightest colour. Fatty acid composition, which was not influenced by live weight, was affected by gender. The subcutaneous fat of female lambs contained more linolenic acid (C18:3) (P⩽0.01) and a greater proportion of polyunsaturated fatty acids than that of male lambs (P⩽0.001). Likewise, the intramuscular fat of female lambs displayed a greater proportion of monounsaturated fatty acids (P⩽0.001) than that of male lambs.

Effective dose in the manufacturing process of rutile covered welding electrodes

Shielded metal arc welding using covered electrodes is the most common welding process. Sometimes the covering contains naturally occurring radioactive materials (NORMs). In Spain the most used electrodes are those covered with rutile mixed with other materials. Rutile contains some detectable natural radionuclides, so it can be considered a NORM. This paper mainly focuses on the use of MCNP (Monte Carlo N-Particle Transport Code) as a predictive tool to obtain doses in a factory which produces this type of electrode and assess the radiological impact in a specific facility after estimating the internal dose.To do this, in the facility, areas of highest radiation and positions of workers were identified, radioactive content of rutile and rutile covered electrodes was measured, and, considering a worst possible scenario, external dose at working points has been calculated using MCNP. This procedure has been validated comparing the results obtained with those from a pressurised ionisation chamber and TLD dosimeters. The internal dose has been calculated using DCAL (dose and risk calculation). The doses range between 8.8 and 394 μSv yr(-1), always lower than the effective dose limit for the public, 1 mSv yr(-1). The highest dose corresponds to the mixing area.

Glycogen synthase kinase-3 inhibitors as potent therapeutic agents for the treatment of Parkinson disease

Parkinson's disease (PD) is a devastating neurodegenerative disorder characterized by degeneration of the nigrostriatal dopaminergic pathway. Because the current therapies only lead to temporary, limited improvement and have severe side effects, new approaches to treat PD need to be developed. To discover new targets for potential therapeutic intervention, a chemical genetic approach involving the use of small molecules as pharmacological tools has been implemented. First, a screening of an in-house chemical library on a well-established cellular model of PD was done followed by a detailed pharmacological analysis of the hits. Here, we report the results found for the small heterocyclic derivative called SC001, which after different enzymatic assays was revealed to be a new glycogen synthase kinase-3 (GSK-3) inhibitor with IC(50) = 3.38 ± 0.08 μM. To confirm that GSK-3 could be a good target for PD, the evaluation of a set of structurally diverse GSK-3 inhibitors as neuroprotective agents for PD was performed. Results show that inhibitors of GSK-3 have neuroprotective effects in vitro representing a new pharmacological option for the disease-modifying treatment of PD. Furthermore, we show that SC001 is able to cross the blood-brain barrier, protects dopaminergic neurons, and reduces microglia activation in in vivo models of Parkinson disease, being a good candidate for further drug development.

Siringoma condroide en la mano. A propósito de un caso

El siringoma condroide (SC) es un tumor muy infrecuente de origen epitelial, por lo general benigno. Clínicamente se presenta en la cabeza y cuello y se caracteriza por ser un tumor subcutáneo o intradérmico, de consistencia firme. El diagnóstico definitivo se establece mediante el estudio anatomopatológico. El tratamiento consiste en la exéresis quirúrgica. En el presente artículo, se presenta un nuevo caso de SC de la mano, de localización extraordinariamente infrecuente.

African swine fever virus p72 genotype IX in domestic pigs, Congo, 2009

African swine fever virus p72 genotype IX, associated with outbreaks in eastern Africa, is cocirculating in the Republic of the Congo with West African genotype I. Data suggest that viruses from eastern Africa are moving into western Africa, increasing the threat of outbreaks caused by novel viruses in this region.

Osteoma osteoide en hueso ganchoso

El osteoma osteoide es un tumor óseo benigno poco frecuente en la muñeca. Se caracteriza por la aparición de dolor inespecífico sin relación con actividades, que empeora por la noche y mejora con la administración de ácido acetilsalicílico. Su diagnóstico se basa en la clínica y en las pruebas se imagen, fundamentalmente en la TAC y la RM. El tratamiento consiste en la exéresis quirúrgica.

Presentamos un caso clínico de un osteoma osteoide en el ganchoso junto a una revisión de la literatura.