Resistant pests : A producer’s perspective

La population mondiale continue de s'accroître rapidement tout en exigeant l'innocuité de ses aliments. Ces aliments sont produits sur une étendue limitée de sol et d'eau qui doit être protégée aujourd'hui et pour les générations à venir. En s'adaptant aux méthodes de lutte utilisées, les ennemis des cultures, actuels et nouveaux, se modifient et prolifèrent sous les conditions que nous leur fournissons lors de la production de ces denrées alimentaires. Pour produire des aliments tout en encourageant l'utilisation efficace des ressources et le développement durable, les producteurs de cultures et les éleveurs doivent choisir des moyens sûrs et efficaces pour gérer les ravageurs à des niveaux acceptables et limiter leur capacité de s'adapter. Actuellement, un problème existe, en ce sens que les responsables de cette gestion, à savoir les politiciens, les législateurs gouvernementaux, l'industrie agro-chimique, les comités de recherche et d'experts, ainsi que les producteurs et les consommateurs ne disposent pas d'une stratégie à long terme sur la façon de gérer les ennemis des cultures de façon efficace et sécuritaire. Une telle stratégie identifierait clairement la gestion intégrée efficace comme un élément pour assurer l'inocuité alimentaire, ainsi que le maintien de la qualité du sol et des habitats fauniques. En raison de la vitesse à laquelle la résistance ou l'adaptation apparaissent, le développement d'une stratégie à long terme doit être mis en branle rapidement.The world population continues to grow rapidly while also demanding a safe, secure food supply. This supply is produced on a limited soil and water base which needs to be protected today and for future generations. By adapting to the control methods that are being used, current and new pests are changing and thriving under the conditions we provide while we produce food. A resource efficient and sustainable food production chain requires that producers of crops and livestock have a selection of safe, effective tools to manage pests to acceptable levels, and to minimize their ability to adapt. At present, the problem exists that those with responsibility for pest management like government policy makers, government regulators, the pest control industry, research and expert committees, food producers and consumers, lack a long-term strategic plan on how to manage pests safely and effectively. Such a strategic plan would clearly identify effective pest management as a major key, one that would give food producers the means of providing for food security while maintaining soil quality and wildlife habitat. Because of the speed at which pest resistance or adaptation is occurring, the process of developing the long-term strategy must be put in place quickly

Epidemiology of Injury in Women’s Super League Football: A Cohort Study

Introduction: The epidemiology of injury in male professional football has been well documented (Ekstrand, Hägglund, & Waldén, 2011) and used as a basis to understand injury trends for a number of years. The prevalence and incidence of injuries occurring in women’s super league football is unknown. The aim of this study is to estimate the prevalence and incidence of injury in an English Super League Women’s Football squad. Methods: Following ethical approval from Leeds Beckett University, players (n = 25) signed to a Women’s Super League Football club provided written informed consent to complete a self-administered injury survey. Measures of exposure, injury and performance over a 12-month period was gathered

Global CNS gene transfer for a childhood neurogenetic enzyme deficiency: Canavan disease.

The neurogenetic prototypic disease on which we chose to test our gene therapy strategy is Canavan disease (CD). CD is an autosomal recessive leukodystrophy associated with spongiform degeneration of the brain. At present the disease is uniformly fatal in affected probands. CD is characterized by mutations in the aspartoacylase (ASPA) gene, resulting in loss of enzyme activity. In this review, recent evidence is summarized on the etiology and possible treatments for CD. In particular, we discuss two gene delivery systems representing recent advances in both viral and liposome technology: a novel cationic liposome-polymer-DNA (LPD) complex, DCChol/DOPE-protamine, as well as recombinant adeno-associated virus (AAV) vectors

Inhibition of release of inflammatory in primary and cultured cells by a Chinese herbal medicine formula for allergic rhinitis

BACKGROUND - We demonstrated that a Chinese herbal formula, which we refer to as RCM-101, developed from a traditional Chinese medicine formula, reduced nasal and non-nasal symptoms of seasonal allergic rhinitis (SAR). The present study in primary and cultured cells was undertaken to investigate the effects of RCM-101 on the production/release of inflammatory mediators known to be involved in SAR. METHODS - Compound 48/80-induced histamine release was studied in rat peritoneal mast cells. Production of leukotriene B4 induced by the calcium ionophore A23187 was studied in porcine neutrophils using an HPLC assay and lipopolysaccharide-stimulated prostaglandin E2 production was studied in murine macrophage (Raw 264.7) cells by immune-enzyme assay. Expression of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) was determined in Raw 264.7 cells, using western blotting techniques. RESULTS - RCM-101 (1-100 microg/mL) produced concentration-dependent inhibition of compound 48/80-induced histamine release from rat peritoneal mast cells and of lipopolysaccharide-stimulated prostaglandin E2 release from Raw 264.7 cells. Over the range 1 - 10 microg/mL, it inhibited A23187-induced leukotriene B4 production in porcine neutrophils. In addition, RCM-101 (100 microg/mL) inhibited the expression of COX-2 protein but did not affect that of COX-1. CONCLUSION - The findings indicate that RCM-101 inhibits the release and/or synthesis of histamine, leukotriene B4 and prostaglandin E2 in cultured cells. These interactions of RCM-101 with multiple inflammatory mediators are likely to be related to its ability to reduce symptoms of allergic rhinitis

Rapid change in freshwater content of the Arctic Ocean

Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 36 (2009): L10602, doi:10.1029/2009GL037525.The dramatic reduction in minimum Arctic sea ice extent in recent years has been accompanied by surprising changes in the thermohaline structure of the Arctic Ocean, with potentially important impact on convection in the North Atlantic and the meridional overturning circulation of the world ocean. Extensive aerial hydrographic surveys carried out in March–April, 2008, indicate major shifts in the amount and distribution of fresh-water content (FWC) when compared with winter climatological values, including substantial freshening on the Pacific side of the Lomonosov Ridge. Measurements in the Canada and Makarov Basins suggest that total FWC there has increased by as much as 8,500 cubic kilometers in the area surveyed, effecting significant changes in the sea-surface dynamic topography, with an increase of about 75% in steric level difference from the Canada to Eurasian Basins, and a major shift in both surface geostrophic currents and freshwater transport in the Beaufort Gyre.Support for this work was provided by the National Science Foundation Office of Polar Programs under grants 0352687, 0634097 (MGM); 0633979, 0806115 (AP); 0633885, 0352754, 0634226 (MAS, JHM); and 06341222 (MBA)

Fatigue in adults with cerebral palsy: A three-year follow-up study.

OBJECTIVES: To describe the course of fatigue over a 3-year follow-up period in adults with cerebral palsy and to investigate the association of known determinants of fatigue (i.e. demographic characteristics and/or body composition) with change in fatigue. METHODS: Forty-one adults with cerebral palsy from a previous study of fatigue were invited to participate in a follow-up study. Twenty-three adults with cerebral palsy (Gross Motor Function Classification System (GMFCS) levels I-V; mean age 38 years 2 months, standard deviation (SD) 14 years 1 month)) agreed to participate (convenience sample). Fatigue was measured with the Fatigue Impact and Severity Self-Assessment (FISSA, range 31-157) questionnaire. The course of fatigue is described at group, subgroup (GMFCS) and individual levels. RESULTS: The mean FISSA score for all participants was 84.0 (SD 27.7) at baseline and 91.7 (SD 26.7) at follow-up. Despite variations among individuals in the change of fatigue, there was no statistically significant difference in FISSA score over time (p = 0.087, 95% confidence interval (95% CI) -16.7 to 1.22). No known determinants of fatigue predictive of change in FISSA scores were found. DISCUSSION: Fatigue appears to be relatively stable within adults with cerebral palsy over time, with a variable presentation between individuals and across GMFCS levels. Care providers should monitor and discuss fatigue in young individuals with cerebral palsy in order to attenuate fatigue later in life

The lymphocyte secretome from young adults enhances skeletal muscle proliferation and migration, but effects are attenuated in the secretome of older adults.

Older people experience skeletal muscle wasting, in part due to impaired proliferative capacity of quiescent skeletal muscle satellite cells which can be reversed by exposure to young blood. To investigate the role of immune cells in muscle regeneration, we isolated lymphocytes from whole blood of young and older healthy volunteers and cultured them with, or without, anti-CD3/CD28 activators to induce release of cytokines, interleukins, and growth factors into the media. The secreted proteins were collected to prepare a conditioned media, which was subsequently used to culture C2C12 myoblasts. The conditioned media from the activated young lymphocytes increased the rate of proliferation of myoblasts by around threefold (P < 0.005) and caused an approximate fourfold (P < 0.005) increase in migration compared with nonactivated lymphocyte control media. These responses were characterized by minimal myotube formation (2%), low fusion index (5%), low myosin heavy chain content, and substantial migration. In contrast, myoblasts treated with conditioned media from activated old lymphocytes exhibited a high degree of differentiation, and multi-nucleated myotube formation that was comparable to control conditions, thus showing no effect on proliferation or migration of myoblasts. These results indicate that secreted proteins from lymphocytes of young people enhance the muscle cell proliferation and migration, whereas secreted proteins from lymphocytes of older people may contribute to the attenuated skeletal muscle satellite cell proliferation and migration

Inhibition of release of inflammatory mediators in primary and cultured cells by a Chinese herbal medicine formula for allergic rhinitis

BACKGROUND: We demonstrated that a Chinese herbal formula, which we refer to as RCM-101, developed from a traditional Chinese medicine formula, reduced nasal and non-nasal symptoms of seasonal allergic rhinitis (SAR). The present study in primary and cultured cells was undertaken to investigate the effects of RCM-101 on the production/release of inflammatory mediators known to be involved in SAR. METHODS: Compound 48/80-induced histamine release was studied in rat peritoneal mast cells. Production of leukotriene B(4 )induced by the calcium ionophore A23187 was studied in porcine neutrophils using an HPLC assay and lipopolysaccharide-stimulated prostaglandin E(2 )production was studied in murine macrophage (Raw 264.7) cells by immune-enzyme assay. Expression of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) was determined in Raw 264.7 cells, using western blotting techniques. RESULTS: RCM-101 (1–100 μg/mL) produced concentration-dependent inhibition of compound 48/80-induced histamine release from rat peritoneal mast cells and of lipopolysaccharide-stimulated prostaglandin E(2 )release from Raw 264.7 cells. Over the range 1 – 10 μg/mL, it inhibited A23187-induced leukotriene B(4 )production in porcine neutrophils. In addition, RCM-101 (100 μg/mL) inhibited the expression of COX-2 protein but did not affect that of COX-1. CONCLUSION: The findings indicate that RCM-101 inhibits the release and/or synthesis of histamine, leukotriene B(4 )and prostaglandin E(2 )in cultured cells. These interactions of RCM-101 with multiple inflammatory mediators are likely to be related to its ability to reduce symptoms of allergic rhinitis