Indigenous markets for dairy products in Africa: trade-offs between food safety and economics

In the absence of information on which to base policies in emerging dairy markets in developing countries, public officials have tended to rely on models for dairy product marketing and health assurance derived from industrialised countries where large-scale production systems, cold-chain pathways and milk pasteurization and packaging are key features. These models have invariably failed in many African market situations where small-scale dairy systems without cold-chain market pathways currently dominate and will continue to do so in the foreseeable future. The main reason is simple: many resource-poor consumers simply refuse to pay the extra costs that pasteurized, packaged milk incurs, and prefer to buy raw milk and boil it themselves. But the role of traditional preferences should not be discounted: in Kenya, high-income consumers express the same preference for raw milk as do those with lower income, and often end up buying more of it. As a result, informal or raw milk and traditional product markets generally dominate in developing countries, comprising over 90% of the market in Tanzania and Uganda, for example, and some 83% of the market of the world’s largest milk producer, India. In Kenya, the informal market has some 85% market share. The issue, of course, is public health concerns linked to raw milk. Current dairy market policies throughout the developing world have largely been adopted from the West, and reflect international standards of food safety, etc. However, as the percentages above show, they are being systematically ignored, and as a result, most consumers buy milk and dairy products that are completely outside any regulatory environment. It is possible that to better address the public health issues, policies may need to take a more pro-active approach to informal milk trading, and which better address the realities of consumer willingness to pay for higher standards. The policy question which needs to be answered is thus: is it preferable to maintain strict milk standards which result in higher costs and thereby free most marketed milk into informal channels, or is the public better off by standards that are relaxed but capture more of the informal market? If standards were relaxed to allow raw milk marketing, yet maintain some regulations regarding handling and if some incentives were given to milk traders to comply (e.g., training and certification), then a much larger proportion of the milk market may fall under regulatory control, improving the average standards of milk in the market. An important step to addressing this issue is to collect quantitative and qualitative information about milk-borne health risks under different production and marketing situations. This paper describes specific dairy marketing studies in Kenya, Ghana and Tanzania aimed at assessing public health risks from informally marketed milk and examines the economic trade-offs that policy makers should consider. Preliminary results from Kenya are presented and recommendations on cost-effective and practical interventions to improve milk safety made

Detection of curved lines with B-COSFIRE filters: A case study on crack delineation

The detection of curvilinear structures is an important step for various computer vision applications, ranging from medical image analysis for segmentation of blood vessels, to remote sensing for the identification of roads and rivers, and to biometrics and robotics, among others. %The visual system of the brain has remarkable abilities to detect curvilinear structures in noisy images. This is a nontrivial task especially for the detection of thin or incomplete curvilinear structures surrounded with noise. We propose a general purpose curvilinear structure detector that uses the brain-inspired trainable B-COSFIRE filters. It consists of four main steps, namely nonlinear filtering with B-COSFIRE, thinning with non-maximum suppression, hysteresis thresholding and morphological closing. We demonstrate its effectiveness on a data set of noisy images with cracked pavements, where we achieve state-of-the-art results (F-measure=0.865). The proposed method can be employed in any computer vision methodology that requires the delineation of curvilinear and elongated structures.Comment: Accepted at Computer Analysis of Images and Patterns (CAIP) 201

The effects of treatment with chemotherapy on energy metabolism and inflammatory mediators in small-cell lung carcinoma.

A disturbed energy balance has been demonstrated in lung cancer patients. Both an enhanced resting energy expenditure (REE) and a decreased energy intake contribute to weight loss. Enhanced systemic levels of inflammatory mediators were found to be related to the enhanced REE in lung cancer. The aim of the present study was to investigate energy metabolism and systemic levels of inflammatory mediators in small-cell lung carcinoma (SCLC) patients before and after treatment with chemotherapy. Hypermetabolism and an enhanced inflammatory response have already been demonstrated in SCLC by our group before. Twelve newly diagnosed SCLC patients were consecutively included in the study. REE was measured by indirect calorimetry and body composition was determined by bioelectrical impedance (BIA) before and 1 month after treatment. To assess the inflammatory state the acute-phase proteins, C-reactive protein (CRP) and lipopolysaccharide-binding protein (LBP), both soluble tumour necrosis factor (TNF) receptors, (sTNF-R)-55 and sTNF-R75, and soluble intercellular adhesion molecule (sICAM)-1 were measured in plasma before and 1 month after treatment. CRP was assessed by turbidemetry, whereas the other inflammatory parameters were measured by enzyme-linked immunosorbent assay (ELISA). A significant reduction in REE was found irrespective of therapeutic outcome, whereas body weight and body composition remained stable. The acute-phase proteins CRP and LBP were reduced significantly after treatment with chemotherapy, whereas both sTNF receptors and sICAM-1 remained enhanced. No correlation, however, existed between the decrease in REE and the decrease in the acute-phase proteins. In conclusion, chemotherapeutic treatment attenuates the tumour-related metabolic derangements and acute-phase response

Natural history of Arabidopsis thaliana and oomycete symbioses

Molecular ecology of plant–microbe interactions has immediate significance for filling a gap in knowledge between the laboratory discipline of molecular biology and the largely theoretical discipline of evolutionary ecology. Somewhere in between lies conservation biology, aimed at protection of habitats and the diversity of species housed within them. A seemingly insignificant wildflower called Arabidopsis thaliana has an important contribution to make in this endeavour. It has already transformed botanical research with deepening understanding of molecular processes within the species and across the Plant Kingdom; and has begun to revolutionize plant breeding by providing an invaluable catalogue of gene sequences that can be used to design the most precise molecular markers attainable for marker-assisted selection of valued traits. This review describes how A. thaliana and two of its natural biotrophic parasites could be seminal as a model for exploring the biogeography and molecular ecology of plant–microbe interactions, and specifically, for testing hypotheses proposed from the geographic mosaic theory of co-evolution

Blockade of T-cell activation by dithiocarbamates involves novel mechanisms of inhibition of nuclear factor of activated T cells.

Dithiocarbamates (DTCs) have recently been reported as powerful inhibitors of NF-kappaB activation in a number of cell types. Given the role of this transcription factor in the regulation of gene expression in the inflammatory response, NF-kappaB inhibitors have been suggested as potential therapeutic drugs for inflammatory diseases. We show here that DTCs inhibited both interleukin 2 (IL-2) synthesis and membrane expression of antigens which are induced during T-cell activation. This inhibition, which occurred with a parallel activation of c-Jun transactivating functions and expression, was reflected by transfection experiments at the IL-2 promoter level, and involved not only the inhibition of NF-kappaB-driven reporter activation but also that of nuclear factor of activated T cells (NFAT). Accordingly, electrophoretic mobility shift assays (EMSAs) indicated that pyrrolidine DTC (PDTC) prevented NF-kappaB, and NFAT DNA-binding activity in T cells stimulated with either phorbol myristate acetate plus ionophore or antibodies against the CD3-T-cell receptor complex and simultaneously activated the binding of AP-1. Furthermore, PDTC differentially targeted both NFATp and NFATc family members, inhibiting the transactivation functions of NFATp and mRNA induction of NFATc. Strikingly, Western blotting and immunocytochemical experiments indicated that PDTC promoted a transient and rapid shuttling of NFATp and NFATc, leading to their accelerated export from the nucleus of activated T cells. We propose that the activation of an NFAT kinase by PDTC could be responsible for the rapid shuttling of the NFAT, therefore transiently converting the sustained transactivation of this transcription factor that occurs during lymphocyte activation, and show that c-Jun NH2-terminal kinase (JNK) can act by directly phosphorylating NFATp. In addition, the combined inhibitory effects on NFAT and NF-KB support a potential use of DTCs as immunosuppressants

A novel germline mutation of PTEN associated with brain tumours of multiple lineages

We have identified a novel germline mutation in the PTEN tumour suppressor gene. The mutation was identified in a patient with a glioma, and turned out to be a heterozygous germline mutation of PTEN (Arg234Gln), without loss of heterozygosity in tumour DNA. The biological consequences of this germline mutation were investigated by means of transfection studies of the mutant PTEN molecule compared to wild-type PTEN. In contrast to the wild-type molecule, the mutant PTEN protein is not capable of inducing apoptosis, induces increased cell proliferation and leads to high constitutive PKB/Akt activation, which cannot be increased anymore by stimulation with insulin. The reported patient, in addition to glioma, had suffered from benign meningioma in the past but did not show any clinical signs of Cowden disease or other hereditary diseases typically associated with PTEN germline mutations. The functional consequences of the mutation in transfection studies are consistent with high proliferative activity. Together, these findings suggest that the Arg234Gln missense mutation in PTEN has oncogenic properties and predisposes to brain tumours of multiple lineages

Global Regulator SATB1 Recruits β-Catenin and Regulates TH2 Differentiation in Wnt-Dependent Manner

Chromatin organizer SATB1 and Wnt transducer β-catenin form a complex and regulate expression of GATA3 and TH2 cytokines in Wnt-dependent manner and orchestrate TH2 lineage commitment

Treatment of multiple traumatized adolescents by enhancing regulation skills and reducing trauma related symptoms: rationale, study design, and methods of randomized controlled trial (the Mars-study)

BACKGROUND: There is ongoing debate regarding the treatment of severe and multiple traumatized children and adolescents with post-traumatic stress disorder (PTSD). Many clinicians favor a phase-based treatment approach (i.e., a stabilization phase prior to trauma-focused therapy) over immediate trauma-focused psychological treatment, despite the lack of scientific evidence. Research on the effects of different treatment approaches is needed for children and adolescents with (symptoms of complex) PTSD resulting from repeated sexual and/or physical abuse during childhood. OBJECTIVE: This paper describes the rationale, study design, and methods of the MARS-study, a two-arm randomized controlled trial (RCT) that aims to compare the results of phase-based treatment with those of immediate trauma-focused treatment and determine whether immediate trauma-focused treatment is not worse than phase-based treatment in reducing PTSD symptoms. METHODS: Participants are individuals between 12 and 18 years who meet the diagnostic criteria for PTSD due to repeated sexual abuse, physical abuse, or domestic violence during childhood. Participants will be blindly allocated to either the phase-based or immediate trauma-focused treatment condition. In the phase-based treatment condition, participants receive 12 sessions of the Dutch version of Skill Training in Affective and Interpersonal Regulation (STAIR-A), followed by 12 sessions of EMDR therapy. In the immediate trauma-focused condition, the participants receive 12 sessions of EMDR therapy. The two groups are compared for several outcome variables before treatment, mid-treatment (only in the phase-based treatment condition), after 12 trauma-focused treatment sessions (post-treatment), and six months post-treatment (follow-up). The main parameter is the presence and severity of PTSD symptoms (Clinician-Administered PTSD Scale for Children and Adolescents, CAPS-CA). The secondary outcome variables are the severity of complex PTSD symptoms (Interpersonal Problems as measured by the Experiences in Close Relationship-Revised, ECR-RC; Emotion Regulation as measured by the Difficulties in Emotion Regulation Scale, DERS; Self Esteem as measured by the Rosenberg Self Esteem Scale, RSES), changes in anxiety and mood symptoms (Revised Anxiety and Depression Scale; RCADS), changes in posttraumatic cognitions (Child Posttraumatic Cognitions Inventory, CPTCI), changes in general psychopathology symptoms (Child Behavior Checklist, CBCL), and Quality of Life (Youth Outcome Questionnaire, Y-OQ-30). Furthermore, parental stress (Opvoedingsvragenlijst, OBVL) and patient-therapist relationship (Feedback Informed Treatment, FIT) will be measured, whereas PTSD symptoms will be monitored in each session during both treatment conditions (Children's Revised Impact of Event Scale, CRIES-13). DISCUSSION: Treating (symptoms of complex) PTSD in children and adolescents with a history of repeated sexual and/or physical abuse during childhood is of great importance. However, there is a lack of consensus among trauma experts regarding the optimal treatment approach. The results of the current study may have important implications for selecting effective treatment options for clinicians working with children and adolescents who experience the effects of exposure to multiple interpersonal traumatic events during childhood. TRIAL REGISTRATIONS: The study was registered on the "National Trial Register (NTR)" with the number NTR7024. This registry was obtained from the International Clinical Trial Registry Platform (ICTRP) and can be accessed through the ICTRP Search Portal ( https://trialsearch.who.int/ )