Localization in situ of costimulatory molecules and cytokines in B-cell non-Hodgkin's lymphoma

Costimulatory molecules are essential in cognate interactions between T and B lymphocytes. To study the prerequisites of functional interactions between malignant B cells and intermingled T cells in B-cell non-Hodgkin's lymphomas (B-NHL), we examined the expression of CD40, CD80 and CD86 and their ligands CD40 ligand (CD40L, CD154), CD28 and...

Increased immunoreactivity and protein tyrosine kinase activity of the protooncogene pp60c-src in preneoplastic lesions in rat pancreas

This study investigates the possibility that the c-Src protein tyrosine kinase is involved in experimental exocrine pancreatic carcinogenesis. Expression and activity of the protooncogene pp60c-src (c-Src) are investigated in acinar pancreatic (pre-) neoplastic lesions induced in rats by azaserine and compared with normal rat pancreas. Low or...

Overexpression of transforming growth factor-α and epidermal growth factor receptor, but not epidermal growth factor, in exocrine pancreatic tumours in hamsters

Using immunohistochemistry, Northern blotting and a semi-quantitative PCR technique, epidermal growth factor (EGF), transforming growth factor-α (TGF-α) and epidermal growth factor receptor (EGFR) expression were studied in the pancreas of N-nitrosobis(2-oxopropyl)-amine (BOP)-treated hamsters. After initiation pancreatic carcinogenesis was...

Epidermal growth factor receptor expression in pancreatic lesions induced in the rat by azaserine

In the present study, the expression of the epidermal growth factor receptor (EGFR) was investigated in putative preneoplastic and neoplastic acinar cell lesions induced in the rat pancreas by azaserine, using Northern blotting, in situ hybridisation (ISH) and immunohistochemistry. EGFR protein levels were decreased in putative preneoplastic...

Transforming growth factor-alfa and epidermal growth factor expression in the exocrine pancreas of azaserine-treated rats: Modulation by cholecystokinin or a low fat, high fiber (caloric restricted) diet

Expression of growth factors and their receptors on human sarcomas. Immunohistochemical detection of platelet-derived growth factor, epidermal growth factor and their receptors

The expression of both platelet-derived growth factor (PDGF) and epidermal growth factor (EGF), and of their receptors was examined immunohistochemically in a number of normal tissues as well as in benign and malignant mesenchymal tumors. The benign lesions studied were from the skin: palmar fibromatosis (fibroblastic) and from the uterus:...