[Use of botulinum toxin in ORL departments in Germany]. / Verwendung von Botulinumtoxin an HNO-Kliniken in Deutschland.

BACKGROUND: There are no regional data about the prevalence and use of botulinum toxin (BoNT) in otorhinolaryngology (ORL) departments in Germany. In order to obtain an overview of the current applications of BoNT in ORL departments a survey was carried out. MATERIALS AND METHODS: Standardized multi-choice questionnaires were mailed to 150 ORL departments. In the analysis a differentiation was made between university and regional departments. Also an analysis of the whole collective of respondent hospitals was carried out. The most commonly treated indication is the Frey syndrome followed by hypersalivation due to a salivary fistula after parotidectomy, dysphagia, aesthetic application and laryngeal dystonia. RESULTS: The rate of return was 62% and 75% of all responding hospitals use BoNT as a therapeutic option, especially where "off-label-use" indications are concerned (15 out of 20 indications or 75%). DISCUSSION: BoNT is widely used as a therapeutic option with an increasing trend. Due to different applications a schedule of hospitals would be helpful in order to be able to find the nearest hospital for the appropriate indications.

The absence of one or both nidogens does not alter basement membrane composition in adult murine kidney.

Nidogen-1 and nidogen-2 are major components of all basement membranes and are considered to function as link molecules between laminin and collagen type IV networks. Surprisingly, the knockout of one or both nidogens does not cause defects in all tissues or in all basement membranes. In this study, we have elucidated the appearance of the major basement membrane components in adult murine kidney lacking nidogen-1, nidogen-2, or both nidogens. To this end, we localized laminin-111, perlecan, and collagen type IV in knockout mice, heterozygous (+/-) or homozygous (-/-) for the nidogen-1 gene, the nidogen-2 gene, or both nidogen genes with the help of light microscopic immunostaining. We also performed immunogold histochemistry to determine the occurrence of these molecules in the murine kidney at the ultrastructural level. The renal basement membranes of single knockout mice contained a similar distribution of laminin-111, perlecan, and collagen type IV compared to heterozygous mice. In nidogen double-knockout animals, the basement membrane underlying the tubular epithelium was sometimes altered, giving a diffuse and thickened pattern, or was totally absent. The normal or thickened basement membrane of double-knockout mice also showed a similar distribution of laminin-111, perlecan, and collagen type IV. The results indicate that the lack of nidogen-1, nidogen-2, or both nidogens, plays no crucial role in the occurrence and localization of laminin-111, collagen type IV, and perlecan in murine tubular renal basement membranes.