Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound   Target Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound

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Query: EC:3.2.1.17 (lysozyme)
21,489 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Immunohistochemical detection of lactoferrin (LF), lysozyme (LZ) and carcinoembryonic antigen (CEA) was made in obstructive adenitis of the submandibular glands. Atrophic and altered acinar cells in the early stage of the lesion stained strongly for LF, whereas they were unreactive or stained slightly for LZ. Ductal cells usually stained for LZ. Staining for CEA was strong and irregularly distributed in altered acinar cells. Duct-like structures and dilated ductal segments in the chronic stage were generally negative for LF, LZ and CEA. Secretory components in luminal cavities gave abundant staining for LF, LZ and CEA. Histocytes which infiltrated into the connective tissue in the later stage showed a positive LZ reaction.
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PMID:Histochemical studies of obstructive adenitis in human submandibular salivary glands. I. Immunohistochemical demonstration of lactoferrin, lysozyme and carcinoembryonic antigen. 393 Jun 73

The distribution of carcinoembryonic antigen (CEA), secretory component (SC), immunoglobulin A (IgA), immunoglobulin M (IgM), J-chain, and lysozyme in tumors of minor salivary glands was investigated using an immunoperoxidase method. Although CEA was demonstrated in both benign and malignant tumors, its distribution was relatively more common and with increased staining intensity in malignant tissues. In pleomorphic adenomas, the distribution of SC was similar to that of IgA and J-chain, suggesting the presence of secretory IgA in the epithelial cells. However, some neoplastic epithelial cells contained SC but not IgA and J-chain. No IgM was detected in such cells. Lysozyme could be demonstrated only in pleomorphic adenomas. Mucoepidermoid tumors and adenoidcystic carcinomas were negative for lysozyme. These findings suggest that some neoplastic ductal epithelial cells of pleomorphic adenomas retain functional characteristics of normal epithelial cells.
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PMID:Immunohistochemical characterization of functional markers in human minor salivary gland tumors. 609 Jun 22

A primary endometrial adenocarcinoma is reported that showed abundant foci suggestive of pathologically differentiated intestinal epithelium. The tumor epithelium was composed of four main cell types. Columnar cells resembled absorptive intestinal cells and displayed glycocalyceal carcinoembryonic antigen immunostaining; mucin-producing cells and a few Paneth-like lysozyme-rich cells were irregularly distributed; a massive quantity of argyrophil cells including a few amphicrine (muco-argyrophil) ones, were detected by Grimelius-Alcian blue method. Immunocytochemical evidence was obtained for the storage of serotonin, somatostatin and gastrin/cholecystokinin in some of the endocrine cells. These findings suggest that the tumor arose from a pluripotential stem cell of the glandular epithelium.
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PMID:Endometrial carcinoma of the intestinal type. A first case report. 615 52

Eighteen argyrophil cell carcinomas in 101 early gastric carcinomas were explained histologically, ultrastructurally, and immunohistochemically for polypeptides, carcinoembryonic antigen (CEA), lysozyme, and human chorionic gonadotrophin (hCG). Seven of these 18 tumors had gastrin, and two of seven tumors also contained somatostatin. In all of these 18 tumors CEA were demonstrated. Seven had lysozyme and five of seven tumors also contained gastrin; hCG were present in four of the 18 tumors and two of four tumors had gastrin, CA, mucin, and lysozyme simultaneously. Argentaffin cells were found in seven of 18 tumors. Of the above seven tumors containing gastrin, three had argentaffin cells. Ultrastructurally, several types of secretory granules were noted and tumor cells resembling D1- or P cells were present in nine of the 18 tumors. Macroscopically, many of the tumors showed IIc or IIc + III type. Histologically, the 18 tumors consisted of six well differentiated adenocarcinomas and 12 poorly differentiated adenocarcinomas including signet-ring cell carcinoma. These 12 tumors frequently developed in the stomach of young females. In view of our previous investigations, it was suggested that the IIc-type argyrophil cell carcinoma histologically showing poorly differentiated adenocarcinoma may be related to scirrhous carcinoma of the stomach.
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PMID:Argyrophil cells in early gastric carcinoma: an immunohistochemical and ultrastructural study. 617 41

In a collection of parotid gland tumors the presence of different antigens was studied by immuno-histochemical methods. The series was composed of different tumors: adeno- and cystadenocarcinomas, adenoid-cystic carcinomas, salivary duct carcinomas, mucoepidermoid tumors, squamous cell carcinomas and anaplastic carcinomas. The following substances were studied: 1. Substances normally present in salivary glands like lysozyme and lactoferrin. 2. Oncofetal antigens: carcinoembryonic antigen (CEA) and alpha-fetoprotein (AFP). 3. Different classes of intermediate-sized filaments: prekeratin and vimentin. The presence of lactoferrin and carcinoembryonic antigen could be demonstrated in the glandular differentiated tumors, whereas the squamous cell carcinomas, although CEA positive, were lactoferrin negative. The anaplastic carcinomas were negative for lactoferrin and CEA. Lysozyme and AFP could not be demonstrated in the tumors of our material. Mucoepidermoid tumors and squamous cell carcinomas were clearly positive for prekeratin filaments whereas the stromal part showed a vimentin filaments in the cytoplasm of fibroblasts. These antigens provide a useful tool to distinguish between the epithelial and mesenchymal tumors.
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PMID:Tumor antigens in neoplasms of the human parotid gland. 618 17

The group of tumour markers contain antigens and cell products which can be demonstrated in tumour cells by immunocytochemical methods (immunofluorescence, immunoperoxidase) and can, thus, be analysed for the classification of tumour. In human salivary gland tumours the distribution of cytoplasmatic antigens as components of the cytoskeleton, the occurrence of cell membrane antigens and of enzymatic cell products is demonstrated. Prekeratin, as an intermediate-sized filament protein, is a specific marker of epithelial tumours, whereas vimentin is a marker of mesenchymal cells. A special feature is the occurrence of prekeratin and vimentin in spindle-shaped cells of pleomorphic adenomas. The tumour-associated carcinoembryonic antigen (CEA) is found in glandular tumours and highly differentiated keratinized squamous cell carcinomas. With regard to enzymatic cell products, lactoferrin is present in glandular tumours and amylase in acinic cell tumours, but lysozyme is not detectable. The implementation of tumour markers contributes not only to an improvement in tumour diagnosis, but opens up new aspects in the cyto- and histogenesis of tumours.
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PMID:[Use of tumor markers in the diagnosis of salivary gland tumors]. 618 37

The light microscopic, electron microscopic and histochemical features of a highly malignant colonic tumor resected from a 39 year old man are presented. The tumor was composed predominantly of undifferentiated cells with focally admixed neuroendocrine, exocrine and squamous cells, occasionally arranged in an organoid manner. Histochemically the tumor contained argyrophilic cells as well as cells that reacted positively with the antibodies to alpha-1-antitrypsin, alpha-1-antichymotrypsin, carcinoembryonic antigen and lysozyme. The term "stem cell carcinoma of the intestine" is proposed for this highly malignant tumor composed of undifferentiated cells exhibiting only focally their multidirectional developmental capacity.
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PMID:Undifferentiated carcinoma of the colon containing exocrine, neuroendocrine and squamous cells. 619 29

Malignant transformation in cells is accompanied by enzymatic changes that may be useful markers of malignancy. Studies of oncofetal antigens in gastric juice show an increased concentration in patients with gastric carcinoma. The object of the present study was to test if the concentration of lysosomal enzymes and carcinoembryonic antigen (CEA) were altered in patients with gastric carcinoma compared to patients earlier operated with gastric resection--a supposedly premalignant condition. The results show that no differences could be found in CEA and beta-hexosaminidase levels between the patients with gastric carcinoma and those with gastric resection. However, lysozyme content was significantly higher in gastric carcinoma and might prove useful for screening of patients after gastric resection. Both CEA, beta-hexosaminidase, and lysozyme levels were significantly higher in patients with gastric carcinoma than in a control population, and can therefore have a role in screening of asymptomatic patients.
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PMID:Carcinoembryogenic antigen and lysosomal enzymes in gastric juice as an aid in the diagnosis of gastric cancer. 622 30

An immunoperoxidase technique has been utilized for the localization of carcinoembryonic antigen (CEA), secretory component (SC) and lysozyme ( LZ ) in normal and cancerous common bile duct tissues. Little or no CEA was found in the non-cancerous common bile duct tissues. SC was found in the surface epithelium and accessory gland epithelium and LZ was demonstrated only in the accessory glands. Some inflammatory cells were also positively stained for LZ . In adenocarcinoma, CEA was always present on the luminar border of the carcinoma cells, occasionally with intercellular and intracellular localization. LZ was absent, or only faintly detected in carcinoma. SC was generally distributed in well-differentiated adenocarcinoma cells, but showed a reduced intensity of staining with progressive dedifferentiation. These findings suggest that CEA, SC and LZ could be useful markers providing valuable information in the pathological diagnosis of bile duct carcinoma.
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PMID:Immunohistochemistry of carcinoembryonic antigen, secretory component and lysozyme in benign and malignant common bile duct tissues. 642 41

An unusual case of classic thymic granuloma is reported. A 16-year-old boy presented with a huge mediastinal mass and the superior vena caval syndrome. Irradiation and combination chemotherapy induced complete remission, despite several episodes of lymph node recurrence. Examination of the first biopsy specimen was considered to indicate a histiocytic tumor or malignant form of eosinophilic granuloma, because of the diffuse proliferation of histiocytes and marked infiltration of eosinophils. Late involvement in the lymph node appeared to have the same histologic characteristics as the mediastinal tumor. Immunohistochemically, the proliferating histiocytes were stained with anti-S100 protein IgG but not with anti-lysozyme or anti-NCA (nonspecific cross-reacting antigen with carcinoembryonic antigen) antibody. These characteristics were similar to those of interdigitating cells in the lymph nodes, thymus, and other lymphoid tissues. The relationship of this case to mediastinal Hodgkin's disease or proliferative disorders of histiocytes is discussed.
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PMID:A case of large "thymic granuloma". Neoplasm of T-zone histiocyte. 649 38


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