Enantiospecific effects of cytochrome P450 2C9 amino acid variants on ibuprofen pharmacokinetics and on the inhibition of cyclooxygenases 1 and 2.

Objective: According to in vitro data, the polymorphic cytochrome P450 enzyme 2C9 (CYP2C9) may be the major S-ibuprofen hydroxylase. In humans, there are 2 variants of CYP2C9 with a high population frequency. We studied their impact on ibuprofen pharmacokinetics and on the inhibition of cyclooxygenases 1 and 2.

[Polypoid ulcerating endocarditis aortalis caused by Streptococcus viridans with perforation of the right atrium. Pathology and clinical aspects of 2 autopsy cases].

We report two cases of patients (one 65 and one 43 years of age, respectively) who died of Streptococcus-viridans induced endocarditis of the aortic valve with perforation into the right atrium. Whereas perforation in Staphylococcus-induced endocarditis is a common complication, it occurs rarely in Streptococcus-induced endocarditis. Because of its uncharacteristic symptoms, the endocarditis was clinically unknown in both cases and was recognized to be the cause of death only at autopsy.

Expression of chromogranin A and B and secretoneurin immunoreactivity in neoplastic and nonneoplastic pancreatic alpha cells.

In the endocrine pancreas, chromogranins A and B as well as secretoneurin (a biologically active peptide processed endoproteolytically from secretogranin II) are most intensely expressed in alpha (glucagon) cells. We examined whether the functional status of neoplastic and nonneoplastic human alpha cells is reflected in the expression patterns of chromogranins/secretogranins. Neoplastic alpha cells were analysed immunocytochemically in six functioning glucagonomas and 37 nonfunctioning neuroendocrine tumours (29 with alpha cells) for their immunoreactivity to chromogranin A and B, as well as secretoneurin.

[Clinical relevance of malignant lateral branchial cyst].

We analyzed 7 patients with so called "maligne lateral cervical cysts" regarding the controversies in the literature. Primary tumors of oropharyngeal sites were discovered in all these cases of "branchiogenic carcinoma" rising the final diagnosis of cystic metastases. Diagnostic tonsillectomy is supposed to be important to solve this problem of differential diagnosis.

An immunohistochemical study of the breast using antibodies to basal and luminal keratins, alpha-smooth muscle actin, vimentin, collagen IV and laminin. Part II: Epitheliosis and ductal carcinoma in situ.

A detailed immunohistochemical study has been carried out on 63 breast lesions with epitheliosis, ductal carcinoma in situ and clinging carcinoma (lobular cancerization), using antibodies directed against keratins 5/14 and 14, 15, 16, 18, 19, vimentin, smooth muscle actin, collagen IV and laminin. The results have shown that epitheliosis on the one hand and ductal in situ and clinging carcinoma on the other are immunohistochemically different epithelial lesions. Epitheliosis appears to be epithelial hyperplasia with keratin 5/14 and keratin 14, 15, 16, 18, 19-positive cells.