Sidonie Conzelmann

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The antennae of moths have been an invaluable model for studying the principles of odour perception. In spite of the enormous progress in understanding olfaction on the molecular level, for the moth one of the key elements in olfactory signalling, the odourant receptors, are still elusive. We have assessed a genome database of a heliothine moth (Heliothis(More)
Olfactory sensory neurons expressing a given odorant receptor gene project their axons with great precision to a few specific glomeruli in the olfactory bulb. It is not clear to which extent the positions of these glomeruli are fixed. We sought to evaluate the constancy of the glomerular array in the mouse by determining the relative positions of glomeruli(More)
Poly-alpha2,8-sialic acid (polySia) is a unique modification of the neural cell adhesion molecule, NCAM, tightly associated with neural development and plasticity. However, the vital role attributed to this carbohydrate polymer has been challenged by the mild phenotype of mice lacking polySia due to NCAM-deficiency. To dissect polySia and NCAM functions, we(More)
Rat monoclonal antibodies were raised against fragment E3 of the mouse Engelbreth-Holm-Swarm (EHS) tumor laminin and selected according to their exclusive reaction with laminin A chain by immunoblotting and staining pattern in embryonic kidneys by immunofluorescence. Immunochemical studies of nine purified antibodies showed a comparable reaction with(More)
Olfactory receptors of the OR37 subfamily are characterized by distinct sequence features and are expressed in neurons segregated in a restricted area of the olfactory epithelium. In the present study, we have characterized the complement of OR37-like genes in the mouse. Five OR37-like genes were identified. They reside within only 60kb of DNA on chromosome(More)
Olfactory sensory neurons expressing different members of the mOR37 odourant receptor subfamily send their axons to distinct glomeruli located in the immediate vicinity in the olfactory bulb [Strotmann, J., Conzelmann, S., Beck, A., Feinstein, P., Breer, H. & Mombaerts, P. (2000) J. Neurosci., 20, 6927-6938]. In this study, the potential of transgenic mouse(More)
Human perlecan is a heparan sulfate proteoglycan with a large core protein of 467 kDa to which three glycosaminoglycan side chains are attached. It belongs to the heparan sulfate proteoglycan family which has been implicated in strong interactions between developing hematopoietic cells and their microenvironment in the bone marrow. Here we report that(More)
Three novel G-protein-coupled receptor genes related to the previously described RA1c gene have been isolated from the mouse genome. Expression of these genes has been detected in distinct areas of the brain and also in the olfactory epithelium of the nose. Developmental studies revealed a differential onset of expression: in the brain at embryonic stage(More)
Olfactory receptors (ORs) are expressed in sensory neurons of the nasal epithelium, where they are supposed to be involved in the recognition of suitable odorous compounds and in the guidance of outgrowing axons towards the appropriate glomeruli in the olfactory bulb. During development, some olfactory receptor subtypes have also been found in non-sensory(More)
During critical phases of mouse development, axons from olfactory sensory neurons grow out of the nasal neuroepithelium and navigate through the connective mesenchyme tissue towards their targets in the developing telencephalic vesicle. Between embryonic days E11 and E16, populations of cells are located in the mesenchyme which express distinct olfactory(More)