Florfenicol concentrations in milk of lactating cows postreated by intramuscular or intramammary routes

Objetivo. Determinar la concentración de florfenicol en leche bovina después del tratamiento intramuscular o intramamario, para establecer el tiempo de retiro, la eficacia terapéutica, y su influencia sobre la producción láctea. Materiales y métodos. Se seleccionaron doce vacas Holstein en lactancia de la hacienda de Universidad de Antioquia (Colombia). Se asignaron al azar al grupo control (n=6) o al grupo florfenicol (n=6), al cual se le administró 20 mg/kg de florfenicol por vía intramamaria e intramuscular con 15 días de diferencia entre tratamientos. Resultados. La Tmax y Cmax para la vía intramuscular fueron 6 horas y 2.86 mg/L respectivamente. La Tmax y Cmax para la vía intramamaria, fueron estimados como 0 hora y aproximadamente 20000 mg/L respectivamente por extrapolación de la línea de regresión. La fase de eliminación del florfenicol en leche, tuvo una vida media de eliminación (t½) promedio de 19.8 horas y 4.9 horas para la vía intramuscular e intramamaria respectivamente. Cuando la concentración inhibitoria minima (C.I.M) del florfenicol para Stahphylococcus aureus, fue usada como el valor de referencia, la eficacia terapéutica sólo se alcanzó por la vía intramamaria. No existió diferencia estadística significativa entre las producciones lácteas de las vacas tratadas y no tratadas. Conclusiones. De acuerdo con estos resultados, el tiempo de retiro postratamiento no debe ser menor de 3 días para la administración intramamaria y al menos 7 días para la administración intramuscular. La eficacia terapéutica sólo se alcanzó por la vía intramamaria. Además no existió diferencia estadística significativa en la producción láctea de las vacas tratadas con respecto a las no tratadas

La Peña de Estebanvela

Pleistocene and Holocene hunter – gatherers in Iberia and the Gibraltar Strait: the current archaeological record, aims to be an updating of the current knowledge on human predatory societies settled in Iberia. The archaeological record of that region is essential for the reconstruction of Human Evolution in Europe in biological, behavioural and cultural domains thus it preserves the earliest and more significant records of the humanization in the continent and because it allows the recovery of the main trends in that process. This is possible thanks to a rich, large and complete record, encompassing all the stages on that development and all the adaptive and cultural modes. Moreover, the discovery of that record is amongst the earliest known archaeological occurrences in the history of our discipline, materialized already during the XIX century. The main aim of that volume is the systematic presentation of the current empirical data written by the same research teams already on work every year on the excavation and analysis of the sites. We have included the current knowledge on the main archaeo-palaeontological sites, those bearing the more significant record. These sites are arranged in eight physiographic and geological regions with the aim of making clear the adaptive ways of human societies to similar environments. Beyond these eight regions it seemed important to us to present the heritage of symbolic behaviour on the caves of the two regions bearing the more extensive record of that cultural trait: the Cantabrian and the Levantine regions. The cave paintings coming from outside these two regions are presented in their own region. Finally, beyond the empirical data, we would like to highlight the main research lines in which the modern Iberian Archaeology is currently engaged in the field of Human Evolution and Palaeoecology.Peer reviewe

Extracellular Matrix Stiffness and Composition Regulate the Myofibroblast Differentiation of Vaginal Fibroblasts

Fibroblast to myofibroblast differentiation is a key feature of wound-healing in soft tissues, including the vagina. Vaginal fibroblasts maintain the integrity of the vaginal wall tissues, essential to keep pelvic organs in place and avoid pelvic organ prolapse (POP). The micro-environment of vaginal tissues in POP patients is stiffer and has different extracellular matrix (ECM) composition than healthy vaginal tissues. In this study, we employed a series of matrices with known stiffnesses, as well as vaginal ECMs, in combination with vaginal fibroblasts from POP and healthy tissues to investigate how matrix stiffness and composition regulate myofibroblast differentiation in vaginal fibroblasts. Stiffness was positively correlated to production of α-smooth muscle actin (α-SMA). Vaginal ECMs induced myofibroblast differentiation as both α-SMA and collagen gene expressions were increased. This differentiation was more pronounced in cells seeded on POP-ECMs that were stiffer than those derived from healthy tissues and had higher collagen and elastin protein content. We showed that stiffness and ECM content regulate vaginal myofibroblast differentiation. We provide preliminary evidence that vaginal fibroblasts might recognize POP-ECMs as scar tissues that need to be remodeled. This is fundamentally important for tissue repair, and provides a rational basis for POP disease modelling and therapeutic innovations in vaginal reconstruction

Revealing the last 13,500 years of environmental history from the multiproxy record of a mountain lake (Lago Enol, northern Iberian Peninsula)

This is the author's accepted manuscript. The final publication is available at Springer via http://dx.doi.org/10.1007/s10933-009-9387-7.We present the Holocene sequence from Lago Enol (43°16′N, 4°59′W, 1,070 m a.s.l.), Cantabrian Mountains, northern Spain. A multiproxy analysis provided comprehensive information about regional humidity and temperature changes. The analysis included sedimentological descriptions, physical properties, organic carbon and carbonate content, mineralogy and geochemical composition together with biological proxies including diatom and ostracod assemblages. A detailed pollen study enabled reconstruction of variations in vegetation cover, which were interpreted in the context of climate changes and human impact. Four distinct stages were recognized for the last 13,500 years: (1) a cold and dry episode that includes the Younger Dryas event (13,500–11,600 cal. year BP); (2) a humid and warmer period characterizing the onset of the Holocene (11,600–8,700 cal. year BP); (3) a tendency toward a drier climate during the middle Holocene (8,700–4,650 cal. year BP); and (4) a return to humid conditions following landscape modification by human activity (pastoral activities, deforestation) in the late Holocene (4,650–2,200 cal. year BP). Superimposed on relatively stable landscape conditions (e.g. maintenance of well established forests), the typical environmental variability of the southern European region is observed at this site.The Spanish Inter-Ministry Commission of Science and Technology (CICYT), the Spanish National Parks agency, the European Commission, the Spanish Ministry of Science, and the European Social Fund

Revealing the last 13,500 years of environmental history from the multiproxy record of a mountain lake (Lago Enol, northern Iberian Peninsula)

This is the author's accepted manuscript. The final publication is available at Springer via http://dx.doi.org/10.1007/s10933-009-9387-7.We present the Holocene sequence from Lago Enol (43°16′N, 4°59′W, 1,070 m a.s.l.), Cantabrian Mountains, northern Spain. A multiproxy analysis provided comprehensive information about regional humidity and temperature changes. The analysis included sedimentological descriptions, physical properties, organic carbon and carbonate content, mineralogy and geochemical composition together with biological proxies including diatom and ostracod assemblages. A detailed pollen study enabled reconstruction of variations in vegetation cover, which were interpreted in the context of climate changes and human impact. Four distinct stages were recognized for the last 13,500 years: (1) a cold and dry episode that includes the Younger Dryas event (13,500–11,600 cal. year BP); (2) a humid and warmer period characterizing the onset of the Holocene (11,600–8,700 cal. year BP); (3) a tendency toward a drier climate during the middle Holocene (8,700–4,650 cal. year BP); and (4) a return to humid conditions following landscape modification by human activity (pastoral activities, deforestation) in the late Holocene (4,650–2,200 cal. year BP). Superimposed on relatively stable landscape conditions (e.g. maintenance of well established forests), the typical environmental variability of the southern European region is observed at this site.The Spanish Inter-Ministry Commission of Science and Technology (CICYT), the Spanish National Parks agency, the European Commission, the Spanish Ministry of Science, and the European Social Fund

Evidence of paleoecological changes and Mousterian occupations at the Galeria de las Estatuas site, Sierra de Atapuerca, northern Iberian plateau, Spain

Here we present a new site in the Sierra de Atapuerca (Burgos, Spain): Galeria de las Estatuas (GE), which provides new information about Mousterian occupations in the Iberian Plateau. The GE was an ancient entrance to the cave system, which is currently closed and sealed by a stalagmitic crust, below which a detritic sedimentary sequence of more than 2 m is found. This has been divided into five litostratigraphic units with a rich assemblage of faunal and lithic remains of clear Mousterian affinity. Radiocarbon dates provide minimum ages and suggest occupations older than 45 C-14 ka BP. The palynological analysis detected a landscape change to increased tree coverage, which suggests that the sequence recorded a warming episode. The macromammal assemblage is composed of both ungulates (mainly red deer and equids) and carnivores. Taphonomic analysis reveals both anthropic, and to a lesser extent, carnivore activities. The GE was occupied by Neanderthals and also sporadically by carnivores. This new site broadens the information available regarding different human occupations at the Sierra de Atapuerca, which emphasizes the importance of this site-complex for understanding human evolution in Western Europe

TCR signal strength controls thymic differentiation of discrete proinflammatory gamma delta T cell subsets

The mouse thymus produces discrete gd T cell subsets that make either interferon-g (IFN-g) or interleukin 17 (IL-17), but the role of the T cell antigen receptor (TCR) in this developmental process remains controversial. Here we show that Cd3g+/− Cd3d+/− (CD3 double-haploinsufficient (CD3DH)) mice have reduced TCR expression and signaling strength on gd T cells. CD3DH mice had normal numbers and phenotypes of ab thymocyte subsets, but impaired differentiation of fetal Vg6+ (but not Vg4+) IL-17- producing gd T cells and a marked depletion of IFN-g-producing CD122+ NK1.1+ gd T cells throughout ontogeny. Adult CD3DH mice showed reduced peripheral IFN-g+ gd T cells and were resistant to experimental cerebral malaria. Thus, TCR signal strength within specific thymic developmental windows is a major determinant of the generation of proinflammatory gd T cell subsets and their impact on pathophysiology