Check list of ground-dwelling ant diversity (Hymenoptera: Formicidae) of the Iguazú National Park with a comparison at regional scale

We describe the ant fauna of Iguazú National Park (INP), a region of high biodiversity andendemism in northeastern Argentina that includes the southernmost protected area ofthe Atlantic Forest (AF). Ants were sampled over seven periods from 1998 to 2011 usinga variety of techniques. We also surveyed museum collections and the scientific literatureto obtain additional records of ants from INP. In addition to providing a species list, wecompare ant composition of INP to other sites in the Upper Paraná, Serra do Mar CoastalForest and Araucaria ecoregion of AF. A total of 172 ant species belonging to 56 genera arereported; 56 species are new records for Misiones Province and 39 species are reportedfrom Argentina for the first time. Alto Paraná and Canindeyú departments in Paraguaypresent the most similar ant fauna to INP. Serra da Bodoquena in Brazil and Pilcomayoin Argentina showed higher similarity with the Upper Paraná AF ecoregion, despite thatSerra da Bodoquena is composed of a mix of ecoregions. Ant diversity was lower in UpperParaná than in Serra do Mar Coastal Forest ecoregion. This difference may result fromhigher primary productivity and a greater altitudinal variation in the coastal region.Fil: Hanisch, Priscila Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; ArgentinaFil: Calcaterra, Luis Alberto. Fundación para el Estudio de Especies Invasivas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Leponce, M.. Royal Belgian Institute of Natural Sciences. Aquatic and Terrestrial Ecology unit; BélgicaFil: Achury, R.. University of Illinois at Urbana; Estados UnidosFil: Suarez, A. V.. University of Illinois at Urbana; Estados UnidosFil: Silva, R. R.. Museu Paraense Emílio Goeldi; BrasilFil: Paris, Carolina Ivon. Universidad de Buenos Aires; Argentin

Graves disease and IgA deficiency as manifestations of 22q11.2 deletion syndrome:

A síndrome de deleção 22q11.2 (SD22q11.2) está associada à alta variabilidade fenotípica, abrangendo o espectro velocardiofacial/síndrome de DiGeorge. Manifestações autoimunes, endocrinológicas e de imunodeficiência vêm sendo relatadas associadas à síndrome. O objetivo deste estudo foi relatar um caso de SD22q11.2 associado à deficiência de IgA e à doença de Graves e rever a literatura visando verificar a frequência dessas alterações na SD22q11.2. Os distúrbios autoimunes, cada vez mais relacionadas a SD22q11.2 e novos fenótipos, vêm sendo incorporadas ao seu espectro clínico. No presente estudo, verificou-se que a doença de Graves associada à SD22q11.2 foi relatada em apenas dezesseis pacientes e quinze descritos na literatura nos últimos 13 anos. Com base na incidência e na amplitude de seu espectro de manifestações já reconhecidas, reforçaram-se os achados da literatura de que a doença de Graves deve ser incluída nas manifestações da SD22q11.2, o que nos levaria a pesquisá-la nos portadores da deleção 22q11.2.The 22q11.2 deletion syndrome (22q11.2DS) is related to a high phenotypic variability including the velocardiofacial/DiGeorge spectrum. Autoimmune, endocrine and immunodeficiency manifestations have been reportedly associated with the syndrome. The objective of this study was to report a case of 22q11.2DS associated with IgA deficiency and Graves disease and review literature in order to verify the frequency of syndrome alterations. Autoimmune disorders have been increasingly related to 22q11.2DS, and new phenotypes are being incorporated in the clinical spectrum of this syndrome. In our study we found that Graves disease in association with 22q11.2DS was reported in only sixteen patients, and fifteen cases were described in the last 13 years. Based on the incidence and on the amplitude of this recognized spectrum, we reinforce the findings of literature that Graves disease should be included on the 22q11.2DS manifestations, which would lead us to seek it with 22q11.2 deletion patients

Evolución, mercados de destino y participación de la agroindustria hortofrutícola chilena de exportación 2002 – 2011.

p. 8 – 22Los objetivos de este trabajo son: analizar las cantidades y valores transados en los mercados internacionales de productos agroindustriales hortofrutícolas chilenos para el periodo 2002- 2011, identificar los principales mercados de destino de estas exportaciones y determinar su participación (dentro de las mismas) a nivel mundial

Distribución espacio-temporal del langostino Melicertus kerathurus (Forsköl, 1775) en la desembocadura del río Guadalquivir (Golfo de Cádiz, suroeste de la Península Ibérica)

Se ha estudiado la distribución espacio-temporal de las diferentes fracciones de la población del langostino Melicertus kerathurus (Forsköl, 1775) en aguas próximas a la desembocadura del río Guadalquivir. Se realizaron doce campañas mensuales de pesca de arrastre y de ictioplancton desde mayo de 2000 a abril de 2001. La fracción larvaria se detecta en primavera y verano cerca de la desembocadura, existiendo una deriva larvaria hacia el interior del estuario. En primavera también son detectadas las mayores abundancias de reclutas, adultos y reproductores. Reclutas y adultos se concentran en aguas someras cercanas a la desembocadura, mientras que los reproductores se localizan en aguas más profundas. Existe un primer reclutamiento al área en otoño y un segundo reclutamiento más importante en primavera, ambos procedentes del estuario del río. Esta discontinuidad en el reclutamiento y el fenómeno de concentración sexual durante el periodo reproductivo, entre otros factores, marcan la estacionalidad de la pesquería en el área.This study analyses the temporal and spatial distribution of the caramote prawn,, Melicertus kerathurus (Forsköl, 1775) throughout its life stages, in waters off the Guadalquivir River mouth (Gulf of Cadiz, southwest Iberian Peninsula). Monthly trawl surveys and ichthyoplankton samplings were carried out from May 2000 to April 2001. Larvae occurred during spring and summer off the river mouth, where a larval drift into the estuary was observed. The main abundance of recruits, adults and mature individuals was also observed during springtime and in summer, when the reproductive season ends. Recruits and adults are located in swallow waters near the river mouth, whereas mature individuals are in deeper waters. Therefore, two recruitment periods and reproductive concentration behavior, among other factors, characterize the fishing seasonality of the species

Spatial and temporal distribution of the wedge sole Dicologoglossa cuneata (Moreau, 1881) in the Guadalquivir River mouth (Gulf of Cadiz, southwest Iberian Peninsula)

The present paper analyses spatio-temporal variations over the different developmental stages of the population of the wedge sole Dicologoglossa cuneata (Moreau, 1881) in the Guadalquivir River mouth. Monthly fish trawl surveys and ichthyoplankton tows were carried out from May 2000 to April 2001. The species's highest egg and larval abundance occurred during winter and at the beginning of spring, within the area's protected nursery grounds, and to the north of the study zone. D. cuneata juveniles were more abundant during winter, concentrating mainly in the areas close to the river mouth. Likewise, the catches of the adults and spawners were highest during winter, distributed mainly north of the protected nursery grounds. The Guadalquivir mouth ecosystem constitutes a major spawning, nursery and recruitment habitat for the wedge sole, whose spawning season occurs in winter and early spring, coinciding with the principal fishing effort of the fleet specialised in this species.Se analiza la variación espacio-temporal de los distintos estados de desarrollo de la población de acedía Dicologoglossa cuneata (Moreau, 1881) en la zona de la desembocadura del Guadalquivir (golfo de Cádiz) a partir de las campañas mensuales de pesca de arrastre y los muestreos ictioplanctónicos realizados durante el periodo de mayo de 2000 a abril de 2001. Las mayores abundancias de huevos y larvas se registraron en invierno, dentro de la denominada zona de cría y engorde, y en el inicio de la primavera, al norte del área de estudio. Los juveniles, que resultaron más abundantes en invierno, se localizaron en dos núcleos muy próximos a la desembocadura. Las capturas de adultos y reproductores fueron más numerosas en los meses invernales, y se recogieron, principalmente, al norte de la zona protegida. La desembocadura del Guadalquivir constituye un importante hábitat para la puesta, cría y reclutamiento de la acedía. Así, su mayor actividad reproductora se produce en invierno y en el inicio de primavera, coincidiendo con la mayor actividad extractiva de la flota pesquera sobre la especie.Instituto Español de Oceanografí

Distribución espacio-temporal de la acedía Dicologoglossa cuneata (Moreau, 1881) en la desembocadura del río Guadalquivir (Golfo de Cádiz, suroeste de la Península Ibérica

Se analiza la variación espacio-temporal de los distintos estados de desarrollo de la población de acedía Dicologoglossa cuneata (Moreau, 1881) en la zona de la desembocadura del Guadalquivir (golfo de Cádiz) a partir de las campañas mensuales de pesca de arrastre y los muestreos ictioplanctónicos realizados durante el periodo de mayo de 2000 a abril de 2001. Las mayores abundancias de huevos y larvas se registraron en invierno, dentro de la denominada zona de cría y engorde, y en el inicio de la primavera, al norte del área de estudio. Los juveniles, que resultaron más abundantes en invierno, se localizaron en dos núcleos muy próximos a la desembocadura. Las capturas de adultos y reproductores fueron más numerosas en los meses invernales, y se recogieron, principalmente, al norte de la zona protegida. La desembocadura del Guadalquivir constituye un importante hábitat para la puesta, cría y reclutamiento de la acedía. Así, su mayor actividad reproductora se produce en inverno y en el inicio de primavera, coincidiendo con la mayor actividad extractiva de la flota pesquera sobre la especie.The present paper analyses spatio-temporal variations over the different developmental stages of the population of the wedge sole Dicologoglossa cuneata (Moreau, 1881) in the Guadalquivir River mouth. Monthly fish trawl surveys and ichthyoplankton tows were carried out from May 2000 to April 2001. The species’s highest egg and larval abundance occurred during winter and at the beginning of spring, within the area’s protected nursery grounds, and to the north of the study zone. D. cuneata juveniles were more abundant during winter, concentrating mainly in the areas close to the river mouth. Likewise, the catches of the adults and spawners were highest during winter, distributed mainly north of the protected nursery grounds. The Guadalquivir mouth ecosystem constitutes a major spawning, nursery and recruitment habitat for the wedge sole, whose spawning season occurs in winter and early spring, coinciding with the principal fishing effort of the fleet specialized in this species

Spatial and temporal distribution of the caramote prawn Melicertus kerathurus (Forsköl, 1775) in the Guadalquivir River mouth (Gulf of Cadiz, southwest Iberian Peninsula)

This study analyses the temporal and spatial distribution of the caramote prawn, Melicertus kerathurus (Forsköl, 1775) throughout its life stages, in waters off the Guadalquivir River mouth (Gulf of Cadiz, southwest Iberian Peninsula). Monthly trawl surveys and ichthyoplankton samplings were carried out from May 2000 to April 2001. Larvae occurred during spring and summer off the river mouth, where a larval drift into the estuary was observed. The main abundance of recruits, adults and mature individuals was also observed during springtime and in summer, when the reproductive season ends. Recruits and adults are located in swallow waters near the river mouth, whereas mature individuals are in deeper waters. Therefore, two recruitments follow each spawning season, one in autumn and a more important one during spring. Discontinuous recruitment periods and reproductive concentration behaviour, among other factors, characterise the fishing seasonality of the species.Se ha estudiado la distribución espacio-temporal de las diferentes fracciones de la población del langostino Melicertus kerathurus (Forsköl, 1775) en aguas próximas a la desembocadura del río Guadalquivir. Se realizaron doce campañas mensuales de pescas de arrastre y de ictioplancton desde mayo de 2000 a abril de 2001. La fracción larvaria se detecta en primavera y verano cerca de la desembocadura, existiendo una deriva larvaria hacia el interior del estuario. En primavera también son detectadas las mayores abundancias de reclutas, adultos y reproductores. Reclutas y adultos se concentran en aguas someras cercanas a la desembocadura, mientras que los reproductores se localizan en aguas más profundas. Existe un primer reclutamiento al área en otoño y un segundo reclutamiento más importante en primavera, ambos procedentes del estuario del río. Esta discontinuidad en el reclutamiento y el fenómeno de concentración sexual durante el periodo reproductivo, entre otros factores, marcan la estacionalidad de la pesquería en el área.Instituto Español de Oceanografí

Mutations in the ND2 subunit of mitochondrial complex I are sufficient to confer increased tumorigenic and metastatic potential to cancer cells

Multiprotein complexes of the mitochondrial electron transport chain form associations to generate supercomplexes. The relationship between tumor cell ability to assemble mitochondrial supercomplexes, tumorigenesis and metastasis has not been studied thoroughly. The mitochondrial and metabolic differences between L929dt cells, which lost matrix attachment and MHC-I expression, and their parental cell line L929, were analyzed. L929dt cells have lower capacity to generate energy through OXPHOS and lower respiratory capacity than parental L929 cells. Most importantly, L929dt cells show defects in mitochondrial supercomplex assembly, especially in those that contain complex I. These defects correlate with mtDNA mutations in L929dt cells at the ND2 subunit of complex I and are accompanied by a glycolytic shift. In addition, L929dt cells show higher in vivo tumorigenic and metastatic potential than the parental cell line. Cybrids with L929dt mitochondria in L929 nuclear background reproduce all L929dt properties, demonstrating that mitochondrial mutations are responsible for the aggressive tumor phenotype. In spite of their higher tumorigenic potential, L929dt or mitochondrial L929dt cybrid cells are sensitive both in vitro and in vivo to the PDK1 inhibitor dichloroacetate, which favors OXPHOS, suggesting benefits for the use of metabolic inhibitors in the treatment of especially aggressive tumors

Evaluation of mutagenicity and antimutagenicity of different fractions of Pterogyne nitens (Leguminosae), using Tradescantia pallida micronuclei assay

Pterogyne nitens (Fabaceae-Caesalpinioideae) é uma árvore nativa da América do Sul, onde é empregada na medicina popular para o tratamento da ascaridíase. Recentemente, descrevemos o efeito mutagênico do extrato etanólico das folhas de P. nitens. Dessa forma, o presente estudo teve por objetivo aprofundar a avaliação do potencial mutagênico das frações isoladas das folhas de Pterogyne nitens, acetato de etila (AcOEt), n-butanólica (BuOH) e hidroalcóolica (HA). Quando o efeito mutagênico foi observado somente nas maiores concentrações testadas, o potencial antimutagênico também foi avaliado. Os ensaios mutagênicos e antimutagênicos foram realizados utilizando ensaio de micronúcleo em Trandescantia pallida. Na avaliação de mutagenicidade, observou-se o efeito nas frações AcOEt (0,460 mg/mL), BuOH (0,142, 0,285, 0,570 e 1,14 mg/mL) e HA (0,050, 0,100, 0,200 e 0,400 mg/mL). Considerando que o efeito mutagênico da fração AcOEt foi observado somente na concentração mais elevada (0,460 mg/mL), o potencial antimutagênico da mesma foi avaliado. As concentrações de 0,115 e 0,230 mg/mL da fração AcOEt demonstraram atividade antimutagênica. A partir dos resultados do presente estudo, conclui-se que determinadas frações de P. nitens apresentam mutagenicidade (BuOH e HA), enquanto a fração AcOEt apresentou efeito antimutagênico nas maiores concentrações. Esses resultados tornam o estudo da P. nitens bastante promissor, considerando que esta planta possui distribuição geográfica ampla e tem sido pouco estudada.Pterogyne nitens (Fabaceae-Caesalpinioideae) is a tree native to South American, where it is used in folk treatment of ascaridiasis. Recently, we have been describing the mutagenic effect of the ethanol extract of leaves of P. nitens. Thus, the present study aimed at evaluating the mutagenic potential of the ethyl acetate (EtOAc), n- butanol (BuOH) and hydroalcoholic (HA) fractions. When the mutagenic effect was observed only in the highest tested concentrations, the antimutagenic activity was also evaluated. Both mutagenic and antimutagenic assays were performed using T. pallida micronuclei assay. Mutagenicity was observed between different concentrations of the P nitens fractions, EtOAc (0.460 mg/mL), BuOH (0.142, 0.285, 0.570 and 1.14 mg/mL) and HA (0.050, 0.100, 0.200 and 0.400 mg/mL). Whereas the mutagenic effect of the EtOAc fraction was observed in the highest concentration (0.460 mg/mL), its antimutagenic potential was evaluated. The 0.115 and 0.230 mg/mL concentrations of the EtOAc fraction demonstrated antimutagenic activity. Based on the results of the present study we can conclude that some P. nitens fractions (BuOH and HA) demonstrated mutagenic effects whereas the EtOAc fraction shown low mutagenicity and amtimutagenicity in the two higher concentrations. Those results stimulate the studies with P. nitens, which possess spread geographic distribution and it is still low studied