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Circannual variation in blood parasitism in a sub-Saharan migrant passerine bird, the garden warbler

Knowing the natural dynamics of pathogens in migratory birds is important, for example, to understand the factors that influence the transport of pathogens to and their transmission in new geographical areas, whereas the transmission of other pathogens might be restricted to a specific area. We studied haemosporidian blood parasites of the genera Plasmodium, Haemoproteus and Leucocytozoon in a mig

Lower birth weight indicates higher risk of autistic traits in discordant twin pairs

Background. Autism spectrum disorder (ASD) is a neurodevelopmental disorder of complex etiology. Although strong evidence supports the causal role of genetic factors, environmental risk factors have also been implicated. This study used a co-twin-control design to investigate low birth weight as a risk factor for ASD. Method. We studied a population-based sample of 3715 same-sex twin pairs partici

Pathogenic Ischemic Stroke Phenotypes in the NINDS-Stroke Genetics Network.

NINDS (National Institute of Neurological Disorders and Stroke)-SiGN (Stroke Genetics Network) is an international consortium of ischemic stroke studies that aims to generate high-quality phenotype data to identify the genetic basis of pathogenic stroke subtypes. This analysis characterizes the etiopathogenetic basis of ischemic stroke and reliability of stroke classification in the consortium.

Pancreatic cancer - cost for overtreatment with gemcitabine.

Gemcitabine has been the standard chemotherapeutic agent in pancreatic cancer. However, two-thirds of pancreatic tumors display low expression of human equilibrative nucleoside transporter 1 (hENT1), which mediates cellular entry of the drug, and do not respond to gemcitabine therapy. The objective was to determine the costs of gemcitabine overtreatment and the cost-effectiveness of hENT1 testing

Gastric and enteric Helicobacter species in animal models and in the human colon

The Gram-negative genus of Helicobacter consists of many bacterial species that colonize a wide range of animal hosts. The genus can be divided into gastric species that colonize the stomach, and enteric species that preferentially colonize the colon and biliary tree of various animal hosts. Helicobacter pylori cause gastritis, gastro-duodenal ulcer disease and gastric adenocarcinoma and lymphoma

Mechanisms controlling striatal projection neurone generation, from patterning to early differentiation

The striatum is part of the telencephalon, the most anterior part of the vertebrate brain. From when it first can be identified, telencephalic morphology is highly complex and a wide range of mechanisms has been suggested to participate in its induction, patterning and neurogenesis. Sonic hedgehog (shh), a gene coding for a secreted protein has been suggested to be required for ventral telencephal

On the etiology and pathogenesis of systemic lupus erythematosus with special reference to environmental factors

Systemic lupus erythematosus (SLE) is a complex autoimmune disease in which environmental factors interact with genetic factors in the development of the disease process and evolution of clinical manifestations. In this thesis both exogenous factors and host factors were investigated, as well as important immunopathological aspects including involvement of immune complex (IC), the complement syste

Structural studies of metal-binding proteins revealing dynamic behaviour

The Mg2+ and Mn2+ structures of calbindin D9k have been determined and they reveal a conformational change compared to the structures of apo and (Ca2+)2-calbindin D9k. These findings are unique, since normally calcium and not magnesium is known to induce conformational changes of EF-hand proteins. It has also been shown that calbindin D9k

Solute exhange across the alveolo-capillary barrier.

The aim of this thesis was to study the transfer of solutes across the alveolo-capillary barrier in experimental models of alveolar surfactant dysfunction and lung injury as well as in smokers. Experimental studies were performed in anaesthetized, and mechanically ventilated animals. Surfactant dysfunction was induced by administration of a synthetic detergent in aerosol form. Lung injury was indu

Polymer Gels: Modeling the Swelling Behavior

This thesis is concerned with the swelling behavior of polyelectrolyte gels. The thesis can be divided into two parts. Part one deals with the modeling and computer simulation of the gel swelling. The second part contains experimental results from the binding of oppositely charged surfactant to a polyacrylate network and a theoretical model for the swelling in the presence of a "skin" around the g

Costs in the ecology and evolution of the vertebrate immune system

A central assumption of theories of the ecology and evolution of immunological defence is that defence has not only benefits (in the form of resistance against parasites), but also costs. The aim of my studies was to investigate the nature and magnitude of costs of the vertebrate immune system, and to examine some of the consequences of these costs. First, I investigated the energetic cost of the

PACAP and airway regulation with special reference to smooth muscle and neutrophils

The investigations focus on the neuropeptidepituitary adenylate cyclase-activating peptide and its effects on airway regulation, with emphasis on smooth muscle relaxation and neutrophil activation and migration. In the nasal mucosa, PACAP-containing nerve fibers were localized invascular smooth muscle and close to seromucous glands. In the lung, PACAP-containing nerve fibers were found close to se