Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.2.1.17 (lysozyme)
 21,489 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Seven cases of mucus-producing bronchioloalveolar carcinoma, which showed organoid differentiation simulating the gastric pyloric mucosa, were found among 176 cases of lung cancer. This type of adenocarcinoma, which corresponds to bronchioloalveolar carcinoma with mucus-secreting cells in the World Health Organization classification, characteristically formed papillary structures composed of two types of mucus cells: tall columnar cells in the upper portion of the papillary structure and more cuboidal cells in the lower portion. The former contained gastric surface mucous cell-type mucins that stained with galactose oxidase-cold thionine Schiff, whereas the latter possessed gastric gland mucous cell-type mucins specifically stained by paradoxical concanavalin A and were also positive for lysozyme and pepsinogen II by immunostaining. Chromogranin A-reactive tumor cells were also scattered among these tumor cells. This pattern of mucus-secreting cells, therefore, simulated the normal pyloric mucosa of the stomach.
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PMID:Mucinous bronchioloalveolar carcinoma with organoid differentiation simulating the pyloric mucosa of the stomach: clinicopathologic, histochemical, and immunohistochemical analysis. 953 96

Mucinous-type adenocarcinoma and non-mucinous-type adenocarcinoma are known to be the representative histological subtypes of bronchioloalveolar carcinoma. Mucinous-type adenocarcinoma is also known to carry abnormalities of the K- ras gene at high frequency. However, the mixed subtype of the both mucinous-type and non-mucinous-type adenocarcinoma (mixed-type) has not been analyzed in detail, although its existence has been reported in a few papers. In this study we carried out immunohistochemical and molecular biological analyses of 15 examples of the mixed-type, in comparison with 11 cases of mucinous-type and 21 cases of non-mucinous-type adenocarcinoma. Immunohistochemically, lysozyme - one of the specific markers of mucinous-type adenocarcinoma - was not stained in the mucinous component of the mixed-type. K- ras gene mutations were detected only in mucinous-type (73%) and non-mucinous-type (10%) adenocarcinomas and not in either the mucinous or non-mucinous component of the mixed-type (0%). Therefore, although mixed-type adenocarcinomas consist of tumor cells showing both mucinous and non-mucinous morphology, the mucinous component of this type differs from mucinous-type adenocarcinoma in terms of immunohistochemical features and K- ras gene alteration.
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PMID:Mixed mucinous-type and non-mucinous-type adenocarcinoma of the lung: immunohistochemical examination and K- ras gene mutation. 1207 May 99