Biomedical subjects

Christian Vedeler

Publications and source records attributed to Christian Vedeler.

3 recordsLinked to original sources

PubMed2004

Heterogeneous expression of CD59 on human Purkinje cells.

The expression of CD59 and other complement regulators was studied in human cerebellum from 14 individuals with no cerebellar pathology, from one patient with multiple sclerosis (MS) and from two patients with paraneoplastic cerebellar degeneration (PCD). CD59 was present on the Purkinje cells at various levels in eight of the 14 cases with no cerebellar pathology. CD59 was also present on the Purkinje cells of the patient with MS, but not on the scarce remaining Purkinje cells of the two patients with PCD. Other complement regulators (CD35, CD46 and CD55) were not expressed on the Purkinje cells, whereas CD59, CD46 and CD55 were present on the molecular, granulosa and endothelial cells. The results suggest that Purkinje cells not expressing CD59 could be especially prone to complement-mediated damage.

Aged↗

PubMed2003

[Hereditary neuropathies].

BACKGROUND: Hereditary neuropathies constitute a heterogeneous group of diseases that make up a significant proportion of peripheral nerve disease cases. MATERIAL AND METHODS: The paper is based on a review of recent literature, including searches on Medline, and our own clinical and research experience. RESULTS: Charcot-Marie-Tooth disease, itself a heterogeneous disease, is the most common hereditary neuropathy. Several variants of neuropathy are associated with hereditary metabolic disorders. Diagnostic methods include nerve conduction velocity studies and electromyography, quantitative sensory testing, molecular genetic diagnostic testing, and in selected cases processing of nerve biopsies and skin biopsies for determination of epidermal nerve fibre densities. INTERPRETATION: A thorough family history of neuropathic symptoms and signs, and preferably clinical and electrophysiological examination of relatives is essential for the diagnosis of hereditary neuropathy. Molecular genetic analysis is promising for accurate classification of these diseases. Nerve biopsy is only helpful in selected cases.

Charcot-Marie-Tooth Disease↗

PubMed2002

Macrophage infiltration and death in the nerve during the early phases of experimental diabetic neuropathy: a process concomitant with endoneurial induction of IL-1beta and p75NTR.

This study describes the infiltration and death of monocyte/macrophages and concomitant endoneurial expression of the pro-inflammatory cytokine interleukin-1beta (IL-1beta) and neurotrophin receptor p75 (p75NTR) in the sciatic nerve at the early phases of experimental diabetic neuropathy induced in Lewis rats by streptozotocin (STZ) intraperitoneal injection. Immunocytochemistry and single nerve fiber immunostaining showed the presence of macrophages in diabetic nerves by weeks 2 and 3 after STZ administration, and the 15% of these cells were TUNEL positive. IL-1beta was evident in scattered macrophages, and along few isolated nerve fibers until week 5, when it became undetectable, in concomitance with complete endoneurial clearance of macrophages. p75NTR showed an up-regulation in the sciatic nerve of diabetic rats that began by week 3 after STZ administration, reached its peak by week 5, and returned then to a barely detectable level by week 6. These findings seem to indicate that macrophages and IL-1beta may be involved in the pathogenesis of diabetic neuropathy, participating not only to nerve damage but also to the promotion of an attempt of regeneration via p75NTR induction.

Animals↗