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  • Electronic Resource  (2)
  • Cytochrome P-450  (1)
  • Intermediate filament coexpression  (1)
  • 1
    ISSN: 1432-2307
    Keywords: Adrenal cortex ; Hypercorticism ; Adrenocortical adenoma ; Cytochrome P-450 ; Steroid 11β-hydroxylase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cytochrome P-450 specific for steroid 11β-hydroxylation (P-45011β ) was immunohistochemically demonstrated in the adrenal glands of human, pig and bovine and of mineralo- and glucocorticoid excess using a specific monoclonal antibody against P-45011β of bovine adrenocortical mitochondria. P-45011β was present in all three cortical zones of the histologically normal adrenal glands of bovine, pig and human, particularly in the zona fasciculata (ZF) and reticularis (ZR). The P-45011β immunoreactivity was intensive in cortical micronodules and inner ZF and ZR in Cushing's disease, and relatively intensive in the zona glomerulosa (ZG) and outer ZF in idiopathic hyperaldosteronism (IHA), corresponding to the sites of active steroidogenesis. In adenomas with Cushing's syndrome and primary aldosteronism, compact cells were generally stained well. In the adrenal glands attached to the adenomas, immunoreactivity was observed only focally in ZG cells but not in ZF and ZR cells.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2307
    Keywords: Intermediate filament coexpression ; Cytokeratin ; Neurofilament ; Vimentin ; Carcinoid tumours
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The immunohistochemical expression of intermediate filaments was investigated in 56 carcinoid tumors from 50 cases including 31 rectal and 25 non-rectal sites. Cytokeratin was the most frequently expressed in 55 of the tumours. Only one tumour of the stomach was negative for cytokeratin. Neurofilament (68 kd and 160 kd) was positive in 25 (44.6%) tumours with no preferential pattern of expression in particular tumours. Vimentin was positive in 18 out of the 31 rectal carcinoids (58%), and 3 of the 25 non-rectal carcinoids (12%). There was a significant difference in vimentin immunoreactivity between rectal and non-rectal carcinoids. The coexpression of cytokeratin and neurofilament was 44.6% and that of cytokeratin and vimentin was 37.5%. The coexpression of all three types of intermediate filament was 35.5% in rectal carcinoids, but 8% in non-rectal carcinoids. The present study revealed coexpression of cytokeratin, neurofilament and vimentin in carcinoids and an especially high incidence of vimentin expression in those of rectal origin.
    Type of Medium: Electronic Resource
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