Jan O. Lundström

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Several mosquito-borne arboviruses belonging to the genera Alphavirus, Flavivirus, and Bunyavirus have been reported to occur in mosquitoes and to infect humans and other vertebrates in western Europe. These zoonotic viruses circulate in nature either in an Aedes-mammal, Anopheles-mammal, or Culex-bird transmission cycle. Infected humans normally do not(More)
We have demonstrated that calf liver protein disulfide-isomerase (Mr 57,000) is a substrate for calf thymus thioredoxin reductase and catalyzes NADPH-dependent insulin disulfide reduction. This reaction can be used as a simple assay for protein disulfide-isomerase during purification in place of the classical method of reactivation of incorrectly oxidized(More)
To mimic the active sites (Trp-Cys-Gly-His-Cys) contained in two thioredoxin-like domains of the eukaryotic enzyme protein disulfide-isomerase (PDI, EC, the Pro-34 residue of Escherichia coli thioredoxin (Trx) was replaced by His using site-directed mutagenesis. The mutant P34H Trx was isolated in high yield and was stable. The equilibrium between(More)
Field studies were conducted in central Sweden from 1983 through 1985 to obtain information on the etiologic agent of Ockelbo disease, described in Sweden in the 1960s and probably identical to Pogosta disease in Finland and to Karelian fever in the western USSR. Mosquitoes (63,644) collected during this 3 year period yielded 21 virus strains. Ockelbo virus(More)
For birds as well as for other animals, parasites are important selective agents (Møller et al. 1990). The need to defend the body against invading parasites has led birds and other organisms to evolve a wide array of adaptations to prevent initial infection and subsequent proliferation (Sheldon & Verhulst 1996; Clayton & Moore 1997; Norris & Evans 2000). A(More)
The pharmacokinetics and metabolism of the new antipsychotic agent remoxipride ((S)-(-)-3-bromo-N(-)[(1-ethyl-2-pyrrolidinyl)methyl]-2, 6-dimethoxybenzamide, FLA731(-), Roxiam, CAS 80125-14-0) was studied in rodents (mice, rats, hamsters), dogs and human subjects using the unlabelled or the labelled (3H or 14C) drug. Oral administration of 20-40 mumol/kg to(More)
It has been shown previously that CaBP2, the rat analog of the murine protein ERp72, and CaBP1, the rat analogue of the hamster protein P5, represent members of the protein disulfide isomerase (PDI) family and are able to catalyze the reduction of insulin in the presence of various reductants (Nguyen Van et al., 1993). We have now examined the abilities of(More)
The incidence of Ockelbo disease and the prevalence of Ockelbo virus neutralizing antibodies were investigated in a sample of the Swedish population. The disease occurs throughout most of Sweden but with higher incidence and antibody prevalence rates in the central part of the country. It generally affects middle-aged men and women, with equal incidence(More)
Two species of arbovirus vector, Culex torrentium and Culex pipiens (Diptera: Culicidae), occur in several European countries, but difficulties in their accurate identification and discrimination have hampered both detailed and large-scale distribution and abundance studies. Using a molecular identification method, we identified to species 2559 larvae of(More)
We studied adult mosquito assemblages in six wetlands, representing three types (wet meadow, alder swamp, and bog), in the lower part of the River Dalälven in Central Sweden during three consecutive years (2000-2002) and evaluated the influence of wetland type and year. Mosquito abundance differed significantly between years but not between wetland types.(More)