Time-Delayed Subsidies: Interspecies Population Effects in Salmon

Cross-boundary nutrient inputs can enhance and sustain populations of organisms in nutrient-poor recipient ecosystems. For example, Pacific salmon (Oncorhynchus spp.) can deliver large amounts of marine-derived nutrients to freshwater ecosystems through their eggs, excretion, or carcasses. This has led to the question of whether nutrients from one generation of salmon can benefit juvenile salmon from subsequent generations. In a study of 12 streams on the central coast of British Columbia, we found that the abundance of juvenile coho salmon was most closely correlated with the abundance of adult pink salmon from previous years. There was a secondary role for adult chum salmon and watershed size, followed by other physical characteristics of streams. Most of the coho sampled emerged in the spring, and had little to no direct contact with spawning salmon nutrients at the time of sampling in the summer and fall. A combination of techniques suggest that subsidies from spawning salmon can have a strong, positive, time-delayed influence on the productivity of salmon-bearing streams through indirect effects from previous spawning events. This is the first study on the impacts of nutrients from naturally-occurring spawning salmon on juvenile population abundance of other salmon species

Understanding the partners in policymaking program and the impact of participation on parents of children with developmental disabilities

Title from PDF of title page, viewed on June 9, 2011Dissertation advisor: Joan V. GallosVitaIncludes bibliographical references (p. 76-90)Thesis (Ph.D.)--Dept. of Public Affairs and Administration and Dept. of Sociology. University of Missouri--Kansas City, 2011Parents are critical partners in the lives of individuals with developmental disabilities; however, they often lack an understanding of available resources or they do not know how to navigate the disability service system to obtain the services they need. Advocacy and leadership skills along with basic knowledge of best practices can assist individuals with disabilities and their families in obtaining the services they need while limiting societal and systematic hurdles which may prevent them from living their lives as fully participating citizens. The Partners in Policymaking program, which exists both nationally and internationally, trains families of children with development disabilities and adults with disabilities to make changes in their lives and in their communities and ultimately become integrated citizens. Previous research into the effectiveness of the program has shown increased advocacy activities of the participants; however, these studies do not seek an understanding beyond the anticipated outcomes nor identify what features may lead to these outcomes. Using grounded theory, a substantive theory is presented to describe program features and identify outcomes of the Partners in Policymaking program in Missouri. Fourteen parents of children with developmental disabilities who participated in the program were selected using theoretical sampling to participate in semi-structured interviews. Inductive and constant comparison is used to interpret the data until saturation of themes was reached. Seven themes are presented as the key elements which made the Partners in Policy program meaningful for the parents which are: (1) being ready, (2) respect, (3) changed perceptions, (4) membership, (5) understanding possibilities, (6) navigating a future, and (7) decreased intimidations. These themes impacted parents in such a way that they were transformed by their participation in the program. Seven themes are presented as the key elements which made the Partners in Policy program meaningful for the parents which are: (1) being ready, (2) respect, (3) changed perceptions, (4) membership, (5) understanding possibilities, (6) navigating a future, and (7) decreased intimidations. These themes impacted parents in such a way that they were transformed by their participation in the program.Introduction -- Review of the literature -- Evolution of disability policy and Partners in Policymaking Program -- Methodology -- Results -- Conclusio

Polarization restricts hepatitis C virus entry into HepG2 hepatoma cells

The primary reservoir for hepatitis C virus (HCV) replication is believed to be hepatocytes, which are highly polarized with tight junctions (TJ) separating their basolateral and apical domains. HepG2 cells develop polarity over time, resulting in the formation and remodeling of bile canalicular (BC) structures. HepG2 cells expressing CD81 provide a model system to study the effects of hepatic polarity on HCV infection. We found an inverse association between HepG2-CD81 polarization and HCV pseudoparticle entry. As HepG2 cells polarize, discrete pools of claudin-1 (CLDN1) at the TJ and basal/lateral membranes develop, consistent with the pattern of receptor staining observed in liver tissue. The TJ and nonjunctional pools of CLDN1 show an altered association with CD81 and localization in response to the PKA antagonist Rp-8-Br-cyclic AMPs (cAMPs). Rp-8-Br-cAMPs reduced CLDN1 expression at the basal membrane and inhibited HCV infection, supporting a model where the nonjunctional pools of CLDN1 have a role in HCV entry. Treatment of HepG2 cells with proinflammatory cytokines, tumor necrosis factor alpha and gamma interferon, perturbed TJ integrity but had minimal effect(s) on cellular polarity and HCV infection, suggesting that TJ integrity does not limit HCV entry into polarized HepG2 cells. In contrast, activation of PKC with phorbol ester reduced TJ integrity, ablated HepG2 polarity, and stimulated HCV entry. Overall, these data show that complex hepatocyte-like polarity alters CLDN1 localization and limits HCV entry, suggesting that agents which disrupt hepatocyte polarity may promote HCV infection and transmission within the liver

Person-Centered Practice as Anchor and Beacon: Pandemic Wisdom from the NCAPPS Community

Objective: This article summarizes the individual, systemic, and collective challenges and opportunities presented by the COVID-19 pandemic, based on 16 videos solicited by the National Center on Advancing Person-Centered Practices and Systems (NCAPPS) and submitted by NCAPPS collaborators during the first six months of the pandemic. Method: Informed by participatory action approaches and content analysis, we describe common themes in a series of 16 videos solicited by NCAPPS from subject matter experts with professional and lived experience of disability and human services systems. Results: The team organized the findings to identify both specific factors within each of the levels and the complex interplay between each of the factors at four levels: (1) individual disabled people and their/our spouses, family, and friends; (2) person-centered strategies; (3) system, services, and providers; and (4) society. Discussion: Practices such as person-centered planning, peer support, and self-direction enable us to respond to and cope with the traumas caused by the pandemic. Systems-level themes reveal clear opportunities for abandoning outdated practices and rebuilding the service system in a more person-centered manner. Commentators argued that a society that strives for collective responsibility and well-being and leaves no one behind will generate the interdependence necessary to weather disasters like the COVID-19 pandemic. Conclusion: Person-centered practices are both an anchor for weathering the pandemic and a beacon for rebuilding lives, service systems, and communities

Genomic Profiling of Childhood Tumor Patient-Derived Xenograft Models to Enable Rational Clinical Trial Design.

Accelerating cures for children with cancer remains an immediate challenge as a result of extensive oncogenic heterogeneity between and within histologies, distinct molecular mechanisms evolving between diagnosis and relapsed disease, and limited therapeutic options. To systematically prioritize and rationally test novel agents in preclinical murine models, researchers within the Pediatric Preclinical Testing Consortium are continuously developing patient-derived xenografts (PDXs)-many of which are refractory to current standard-of-care treatments-from high-risk childhood cancers. Here, we genomically characterize 261 PDX models from 37 unique pediatric cancers; demonstrate faithful recapitulation of histologies and subtypes; and refine our understanding of relapsed disease. In addition, we use expression signatures to classify tumors for TP53 and NF1 pathway inactivation. We anticipate that these data will serve as a resource for pediatric oncology drug development and will guide rational clinical trial design for children with cancer

Pronova Biopharma - Vurdering av utslipp til Sandefjordsfjorden

Det er gjort en vurdering av hvordan avløpsvann fra Pronova Biopharma kan påvirke oksygenforholdene i Sandefjordsfjorden. Arbeidet har bl.a. omfattet strømmålinger, oksygenprøver og bruk av modeller. Hovedkonklusjonen er at til vanlig vil utslippet bare i meget liten grad påvirke oksygenforholdene. De viktigste elementene i fjordens oksygenbudsjett varierer med tiden, og høsten er den mest sårbare perioden. Man kan ikke se helt bort fra at et sammentreff av flere ugunstige faktorer da kan skape en periode med en merkbar redusert konsentrasjon (til vannkvalitetsklasse Mindre God) i en lokal vannmasse omkring utslippet. Ingen undersøkelser har imidlertid påvist at dette har skjedd.Pronova Biopharma AS, Sandefjord v/ A.L. Steneru

Genetic risk and a primary role for cell-mediated immune mechanisms in multiple sclerosis.

Multiple sclerosis is a common disease of the central nervous system in which the interplay between inflammatory and neurodegenerative processes typically results in intermittent neurological disturbance followed by progressive accumulation of disability. Epidemiological studies have shown that genetic factors are primarily responsible for the substantially increased frequency of the disease seen in the relatives of affected individuals, and systematic attempts to identify linkage in multiplex families have confirmed that variation within the major histocompatibility complex (MHC) exerts the greatest individual effect on risk. Modestly powered genome-wide association studies (GWAS) have enabled more than 20 additional risk loci to be identified and have shown that multiple variants exerting modest individual effects have a key role in disease susceptibility. Most of the genetic architecture underlying susceptibility to the disease remains to be defined and is anticipated to require the analysis of sample sizes that are beyond the numbers currently available to individual research groups. In a collaborative GWAS involving 9,772 cases of European descent collected by 23 research groups working in 15 different countries, we have replicated almost all of the previously suggested associations and identified at least a further 29 novel susceptibility loci. Within the MHC we have refined the identity of the HLA-DRB1 risk alleles and confirmed that variation in the HLA-A gene underlies the independent protective effect attributable to the class I region. Immunologically relevant genes are significantly overrepresented among those mapping close to the identified loci and particularly implicate T-helper-cell differentiation in the pathogenesis of multiple sclerosis

Telephone Consultation for Improving Health of People Living with or at Risk of HIV: A Systematic Review

BACKGROUND: Low cost, effective interventions are needed to deal with the major global burden of HIV/AIDS. Telephone consultation offers the potential to improve health of people living with HIV/AIDS cost-effectively and to reduce the burden on affected people and health systems. The aim of this systematic review was to assess the effectiveness of telephone consultation for HIV/AIDS care. METHODS: We undertook a comprehensive search of peer-reviewed and grey literature. Two authors independently screened citations, extracted data and assessed the quality of randomized controlled trials which compared telephone interventions with control groups for HIV/AIDS care. Telephone interventions were voice calls with landlines or mobile phones. We present a narrative overview of the results as the obtained trials were highly heterogeneous in design and therefore the data could not be pooled for statistical analysis. RESULTS: The search yielded 3321 citations. Of these, nine studies involving 1162 participants met the inclusion criteria. The telephone was used for giving HIV test results (one trial) and for delivering behavioural interventions aimed at improving mental health (four trials), reducing sexual transmission risk (one trial), improving medication adherence (two trials) and smoking cessation (one trial). Limited effectiveness of the intervention was found in the trial giving HIV test results, in one trial supporting medication adherence and in one trial for smoking cessation by telephone. CONCLUSIONS: We found some evidence of the benefits of interventions delivered by telephone for the health of people living with HIV or at risk of HIV. However, only limited conclusions can be drawn as we only found nine studies for five different interventions and they mainly took place in the United States. Nevertheless, given the high penetration of low-cost mobile phones in countries with high HIV endemicity, more evidence is needed on how telephone consultation can aid in the delivery of HIV prevention, treatment and care