Naslov
Influence of the glycosaminoglycan layer on the permeation of hypericin in rat bladders in vivo.

Autori
Huygens, Ann ; Crnolatac, Ivo ; Maes, Jan ; Van Cleynenbreugel, Ben ; Van Poppel, Hendrik ; Roskams, Tania ; de Witte, Peter

Izvornik
BJU international (1464-4096) 100 (2007), 5; 1176-1181

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
hypericin; GAG layer; permeation; bladder

Sažetak
Objective was to investigate the influence of a glycosaminoglycan (GAG) layer on the specific location of hypericin in superficial urothelial carcinoma lesions of the bladder after intravesical instillation. Fisher rat bladders were incubated with 15 or 30 µm hypericin for 2 h. To examine the influence of the GAG layer on the permeation of hypericin, bladders were pre-treated with chondroitinase ABC, n-dodecyl-β-d-maltoside (DDM) or sodium dodecyl sulphate (SDS) to disrupt, or protamine to neutralise the GAG layer before incubating with hypericin. After incubation, the photosensitizer permeation was examined quantitatively in cryostat sections of the bladders, using fluorescence microscopy and image analysis. Disrupting or neutralising the GAG layer in the bladder had no influence on the permeation of hypericin. Pre-treatment of the bladder with chondroitinase, DDM or SDS resulted in a significantly lower accumulation of hypericin, whereas neutralising the GAG layer in rats with protamine had no significant effect on the biodistribution of hypericin. The GAG matrix causes no obstacle to the permeation of hypericin in the urothelium of the bladder, and modification of this GAG layer cannot explain the enhanced accumulation of hypericin in superficial bladder tumours.

Izvorni jezik
Engleski

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