Biomedical subjects

K Früh

Publications and source records attributed to K Früh.

39 records · Page 3Linked to original sources

PubMed1989

Development of the human immune response against the major surface protein (gp190) of Plasmodium falciparum.

The 190-kilodalton glycoprotein (gp190) of Plasmodium falciparum, the precursor of the major surface proteins of merozoites, is considered a promising candidate for a blood stage malaria vaccine. DNA sequences specific for the gp190 of the two isolates K1 and MAD20 were subcloned and expressed in Escherichia coli. The panel of fusion proteins obtained represents about 80% of the polymorphic sequences observed so far within various isolates of P. falciparum. Sera from individuals living in a malaria-endemic area of West Africa were tested in immunoblots against the gp190 fusion proteins, and antibody reactivity was mapped to defined regions of the gp190. Depending on the age of the individual and on the presence of parasites in the blood, distinct regions of gp190 were differentially recognized by the respective antibodies. Similarly, the analysis of sera from German patients with acute malaria revealed a distinct pattern. When grouped according to age and to parasitemia, the reactivity of the sera of people living in malaria-endemic areas may indicate a correlation between certain gp190 regions and protective immune response.

Animals↗

PubMed1988

Neural adhesion molecule L1 as a member of the immunoglobulin superfamily with binding domains similar to fibronectin.

Diverse glycoproteins of cell surfaces and extracellular matrices operationally termed 'adhesion molecules' are important in the specification of cell interactions during development, maintenance and regeneration of the nervous system. These adhesion molecules have distinct functions involving different cells at different developmental stages, but may cooperate when expressed together. Families of adhesion molecules which share common carbohydrate domains do exist, despite the structural and functional diversity of these glycoproteins. These include the Ca2+-independent neural adhesion molecules: N-CAM, myelin associated glycoprotein (MAG) and L1. L1 is involved in neuron-neuron adhesion, neurite fasciculation, outgrowth of neurites, cerebellar granule cell migration, neurite outgrowth on Schwann cells and interactions among epithelial cells of intestinal crypts. We show here that in addition to sharing carbohydrate epitopes with N-CAM and MAG, L1 is also a member of the immunoglobulin superfamily. It contains six C2 domains and also shares three type III domains with the extracellular matrix adhesion molecule fibronectin.

Amino Acid Sequence↗

PubMed1987

Identification of cDNA clones of the mouse neural cell adhesion molecule L1.

Two cDNA clones of the neural cell adhesion molecule L1 (Mr 200,000) were isolated using lambda gt10 and lambda gt11 libraries constructed from postnatal day 8 mouse brain poly(A)+ RNA. Clone K21 was selected and identified using immunoaffinity purified polyclonal antibodies. It was then used to isolate a secondary clone (K21-1), which hybridized with an oligonucleotide probe synthesized by reverse translation of the aminoterminal sequence of the 80 kDa carboxyterminal proteolytic fragment of L1. Blot hybridization analysis indicated that L1 is encoded by a single gene and transcribed by a single 6 kb mRNA which is present only in cells or tissues known to express L1.

Animals↗