Search results for "Rifampicin"
showing 2 items of 22 documents
Klinik und Therapie der fr�hen lepromat�sen Lepra an einem Fallbeispiel
1994
Taking into account the increase in worldwide human migration, leprosy is of growing importance in the differential diagnosis of dermatological diseases encountered in Central Europe. We report on the case of a young man from Ghana who developed hypopigmented maculae and plaques on his trunk and proximal limbs. The diagnosis of lepromatous leprosy could be made in consideration of the histological pattern of infiltrating leucocytes and detection of numerous acid-fast mycobacteria on skin biopsy. The results of the physical examination as well as routine laboratory and immunological parameters were consistent with this form of leprosy. Due to glucose-6-phosphate-dehydrogenase deficiency, tre…
Rifampicin is not an inhibitor of tyrosinase
2022
Rifampicin has been previously described as an inhibitor of tyrosinase (Chai et al., Int. J. Biol. Macromol. 102 (2017) 425–430). However, rifampicin contains a p-diphenol group and compounds with such a moiety have been shown before to reduce tyrosinase-generated o-quinones. Rifampicin also shows strong absorption in a region completely overlapping with the visible absorption band of dopachrome, the oxidation product of L-tyrosine and L-dopa, whose concentration is measured spectrophotometrically in the standard enzymatic assay to monitor the activity of tyrosinase. We have demonstrated that rifampicin is also rapidly oxidized by o-quinones generated from catechols by tyrosinase or by trea…