ABSTRACT
OBJECTIVE: To determine the E-cadherin and beta-catenin expression phenotype in untreated primary prostate cancer and corresponding bone metastases. MATERIALS AND METHODS: Paired bone metastasis and primary prostate specimens were obtained from 14 men with untreated metastatic prostate carcinoma. The tumours were histologically graded by an independent pathologist. Expression of mRNA for E-cadherin and beta-catenin was detected within the tumour cells using in-situ hybridization with a 35S-labelled cDNA probe. The expression of E-cadherin and beta-catenin were graded as uniform, heterogeneous or negative. RESULTS: The mRNA for E-cadherin was expressed in 13 of 14 primary carcinomas and 11 bone metastases; beta-catenin was expressed by 13 and nine, respectively. Of the primary tumours, nine expressed E-cadherin and beta-catenin uniformly; in contrast, all metastases had down-regulated E-cadherin and/or beta-catenin. CONCLUSIONS: The down-regulation of E-cadherin and beta-catenin are a feature of the metastatic phenotype, which may be a significant factor in the genesis of bone metastases. However, this does not appear to be reflected in the expression of these molecules in the primary tumours.
Subject(s)
Bone Neoplasms/metabolism , Cadherins/metabolism , Cytoskeletal Proteins/metabolism , Prostatic Neoplasms/metabolism , Trans-Activators , Bone Neoplasms/secondary , Down-Regulation , Humans , Male , RNA, Messenger/metabolism , beta CateninABSTRACT
Acute percutaneous salicylate intoxication is a rare event in children but can happen with a skin disease where salicylic acid, used as a keratolytic ointment, can be absorbed transcutaneously. Until now, few cases of transcutaneous salicylate intoxication have been reported in the literature. Our case report is about a 5-year-old girl with lamellar ichthyosis and an acute salicylate transcutaneous intoxication after the application of a skin ointment. The child had a fever, hyperpnoea with respiratory alkalosis, comatose state and oculogyric crisis. We would like to emphasize the danger of applying salicylic acid in children with extensive skin diseases and, therefore, it is advisable to measure the plasma salicylic levels so as to prevent eventual salicylate toxicity.
