Effect of irradiation on the expression of E-cadherin and β-catenin in early and late radiation sequelae of the urinary bladder and its modulation by NF-κB inhibitor thalidomide

Publikationen als Autor:in / Herausgeber:in der Vetmeduni

Kleiter, Miriam; Krischak, Alexander

Abstrakt

Purpose In a previous study we have shown in a mouse model that administration of nuclear factor-kappa B (NF-kappa B) inhibitor thalidomide has promising therapeutic effects on early radiation cystitis (ERC) and late radiation sequelae (LRS) of the urinary bladder. The aim of this study was to evaluate in the same mice the effect of thalidomide on adherens junction (AJ) proteins in ERC and LRS. Methods Urothelial expressions of E-cadherin and beta-catenin were assessed by immunohistochemistry in formalin-fixed paraffin-embedded (FFPE) bladder specimens over 360 days post single-dose irradiation on day 0. First, the effect of irradiation on AJ expression and then effects of thalidomide on irradiation-induced AJ alterations were assessed using three different treatment times. Results Irradiation provoked a biphasic upregulation of E-cadherin and beta-catenin in the early phase. After a mild decrease of E-cadherin and a pronounced decrease of beta-catenin at the end of the early phase, both increased again in the late phase. Early administration of thalidomide (day 1-15) resulted in a steeper rise in the first days, an extended and increased expression at the end of the early phase and a higher expression of beta-catenin alone at the beginning of the late phase. Conclusion Upregulation of AJ proteins is an attempt to compensate irradiation-induced impairment of urothelial barrier function. Early administration of thalidomide improves these compensatory mechanisms by inhibiting NF-kappa B signaling and its interfering effects.

Dokumententyp

Originalarbeit

Open Access Type

Hybrid

DOI

10.1007/s00066-021-01751-y

PubMed ID

MEDLINE:33688971