Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P02794 (ferritin)
 17,525 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Ferritin in 93 ovarian epithelial tumors, 10 normal adult ovaries and 4 fetal ovaries were studied with double-PAP technique. Ferritin was demonstrated in 38.89% of the benign ovarian tumors, 46.67% of the borderline and 70.0% of the malignant tumors (P less than 0.05). The positive distribution of ferritin in the serous tumors was more than that in the mucinous and endometrioid tumor (P less than 0.05) and the positive grading of ferritin starring was corresponding to the pathohistopathologic grading of the ovarian tumors. It is considered that ferritin might be used as an immunohistochemical marker in the study of ovarian tumors.
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PMID:[An immunohistochemical study of ferritin in ovarian epithelial tumours]. 132 23

Ferritin in 119 astrocytoma cases was studied by immunocytochemical PAP and immunogold silver staining (IGSS) methods. In 57% of the cases, ferritin was found in the cytoplasm of the tumor cells. The higher the differentiation of the tumor cells, the less ferritin they contained. Contrary to the reaction of glial fibrillary acidic protein (GFAP), the positive rate of ferritin in various types and grades of astrocytomas was inversely proportional to their degree of differentiation. Electron microscopic observation in 30 cases showed ferritin in the cell sap, cytocavity network, endoplasmic reticulum, Golgi apparatus and also in lysosomes. Some of the cases had extraordinary high level of ferritin in their blood serum.
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PMID:Ferritin in astrocytomas. 164 65

High levels of ferritin have been detected in serum and tumoral extracts of gastrointestinal neoplasms. However, its histological localization is not well known. An immunoperoxidase technique (PAP) was used for detecting ferritin in 30 colorectal carcinomas, 20 polyps and 8 cases of non-neoplastic mucosae. Ferritin staining was detected in stromal cells (98%) much more than in epithelial cells (21%). Connective cells were positive in 5 cases of normal mucosae (62%), 19 polyps (95%) and all carcinomas (100%). The number of positive cells gradually rose from normal mucosa to carcinoma with an intermediate score in adenomas. However, no relation could be found between the stromal ferritin score and dysplasia in polyps. Likewise, no relation was found between the stromal ferritin score and the differentiation grade, invasion or metastases in carcinomas. The positive epithelial pattern seen in 12 cases (21%) suggests non-specific staining due to passive diffusion from the stroma. Thus, these immunohistochemical findings suggest that in colonic neoplasms, ferritin could be a tumor marker produced mainly by stromal cell reaction more than by the epithelial cells.
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PMID:Ferritin immunohistochemical localization in normal and neoplastic colonic mucosa. 245 93

An immunohistochemical study was carried out on 28 cases of giant cell tumor of tendon sheath. Although this tumor has been considered to be of histiocytic origin on the basis of light and electron microscopic findings, there remains some debate about the histogenesis of the tumor. To clarify this point, by using the PAP method, each surgical specimen was stained for alpha 1-antitrypsin, alpha 1-antichymotrypsin, lysozyme, ferritin, neuron specific enolase, and S-100 protein. Tumor cells in fifteen out of 28 cases were positively stained for alpha 1-antitrypsin, 19 for alpha 1-antichymotrypsin, 23 for lysozyme, 22 for ferritin, 22 for neuron specific enolase, but no case for S-100 protein. These results suggest that this tumor is composed of cells with histiocytic character. In addition, from the immunohistochemical point of view, at least two types of giant cells seem to exist in this disease.
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PMID:Giant cell tumor of tendon sheath. An immunohistochemical study of 28 cases. 302 39

Updated results of a prospective study assessing the value of tumor marker determinations in a supposedly healthy population (2,000) for identification of a group at risk for cancer are reported. With observation periods varying from 1 to 6 years (mean 3.5 years), repeated determinations by RIA were routinely carried out for CEA, AFP, beta-HCG, beta 2-M, ferritin, and, more recently, beta 1-SP. Preliminary data on TPA, CA 12-5, and CA 19-9 were also obtained. A comparative study of methods for CEA determination using monoclonal and polyclonal antibodies revealed that preference should be given to polyclonal antibodies. In the group considered to be "at risk" (ie, having at least one abnormal marker value) (N = 481), the cancer detection rate was 29 per 1,000 against 3.2 per 1,000 in the normal group (N = 1,519). These figures were significant, even if the number of malignancies detected was small (N = 27). By associating general tumor markers such as CEA, TPA, and CA 19-9 with site-specific markers such as PAP and CA 12-5, it seemed that marker determinations played a useful role in risk assessment in cancer detection programs.
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PMID:Tumor markers for cancer detection. II. 349 Sep 9

The aim of this paper is to determine whether the incidence of estrogen-, progesterone-, CEA-, and ferritin- positive staining of primary tumors, by using the PAP method, is related to the prognosis of breast cancer status. A significantly higher incidence (71 per cent) of CEA-positive tumors was observed in patients who had a recurrence of breast cancer within 2 years after radical operation. Patients, whose tumors were positive in estrogen or negative in CEA, showed a relatively good prognosis, even after a recurrence of the disease. Distant metastases were seen in most of the patients positive in CEA (78 per cent). Before the recurrence of breast cancer, those patients positive in progesterone had a good prognosis. After the recurrence, however, there was no relationship between the prognosis of recurrent disease and the progesterone-staining of primary tumors. Our data suggest that the immunohistological staining of estrogen, progesterone and CEA might offer the effective prognostic indices in breast cancer patients.
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PMID:Immunohistochemical demonstration of estrogen, progesterone, CEA and ferritin in breast cancer and their clinical value for the prediction of early postoperative recurrence. 368 32

The PAP-method was used for immunocytochemical investigations with antisera against angiotensin (ang) I, ang II and renin in kidneys of rats and mice. In 14 rats, ang II was found in the media of the afferent arteriole - both in the region of the JGA and upstream until the interlobular artery. Serial sections alternately reacted for ang II and renin revealed that the octapeptide is contained in the well known renin positive epitheloid cells of the afferent arteriole and, beyond that, together with renin probably in the same "specific" granules. Fixation conditions were critical for the visualization of immunoreactivity With ang I antisera, comparable in terms of titer and affinity to the ang II antisera, specific immunoreactivity could not be found in the kidneys of rats. With horse radish peroxidase and ferritin as tracers it could be shown that the epitheloid cells of the JGA have the ability to pinocytize and incorporate macromolecules into their granules. It is suggested that ang II is taken up by these cells through the same route, Intracellular generation of ang II appears unlikely as an explanation. Functionally the selective uptake of ang II by epitheloid cells might be a specific process, possibly connected with the negative feedback of the octapeptide on renin secretion. Negative results in mice may be explained by a small uptake or more rapid degradation of ang II by the epitheloid cells.
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PMID:Angiotensin II in epitheloid (renin containing) cells of rat kidney. 617 Jun 18

The localization of ferritin was studied in peripheral blood cells and variously fixed tissues with the antibodies against ferritins isolated from human heart and spleen. The unlabelled antibody enzyme method (PAP) was used to detect the binding sites of antibodies. In peripheral blood cell smears both antisera gave rise to strong staining of polymorphonuclear (PMN) cell cytoplasm, whereas the monocytes stained relatively weakly. There were no staining differences between the two antisera. In human spleen sections the spleen ferritin antiserum stained the PMN cells and sinusoidal lining cells, whereas the heart ferritin antiserum stained only PMN cells. Neither of the two antisera stained monocytes in the spleen sections. This finding was observed in specimens fixed in Bouin's fixative, Baker's fixative and neutral formalin. However, the immunoreactivity of ferritin was totally destroyed by some other fixatives (Carnoy's fixative, formol sucrose and glutaraldehyde). These results suggest that ferritin is more readily released from monocytes than from PMN cells, and that mature spleen macrophages contain antigenic determinants of ferritin that are recognized only by anti-spleen ferritin antiserum.
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PMID:Human ferritin: effects of antigen source and fixation on leucocyte staining by immunoperoxidase technique. 618 43

For simultaneous ultrastructural localization of intracellular peptides, protein A-gold techniques or immuno-gold techniques have generally been applied. The present study reports a double immunostaining procedure for simultaneous visualization of two hypophysial hormones (prolactin and corticotropin) on a single ultrathin section of the pars distalis of an amphibian. Prolactin and corticotropin antisera were respectively raised in guinea pigs and rabbits and were applied simultaneously to ultrathin sections. Antigenic binding sites were detected under the electron microscope using differently labeled species-specific secondary antisera raised in goats or sheep. Three labels (gold particles, ferritin, peroxidase) were checked for double labeling. The combinations investigated were: 1) two gold preparations or IgG-gold labeled with different-sized gold particles; 2)IgG-gold and IgG-ferritin; 3) IgG-gold and IgG-PAP (peroxidase-antiperoxidase). The double-immunostaining procedures described here have proved useful in the simultaneous ultrastructural localizations of two intracellular antigens on a single tissue section. These procedures constitute a basis for the development of triple immunostaining methods.
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PMID:A double-immunostaining procedure using colloidal gold, ferritin, and peroxidase as markers for simultaneous detection of two hypophysial hormones with the electron microscope. 620 36

A STEM VG HB 501 equipped with a Gatan spectrometer has been interfaced to a PDP 11-34 computer. Digital energy filtered images have been recorded with several energy windows on both sides of a characteristic level, so that the exact background can be stripped under the core loss signal for each pixel. Results concern the distribution of nitrogen (K-edge at 402 eV), oxygen (K-edge at 532 eV) and iron (L23 edge at 705 eV) in embedded sections of bone marrow. The present performances of the system allow the detection of composition variations of 1 to 2% for these elements, with a lateral accuracy of the order of 5 nm in a section of 50 nm thickness. Individual ferritin molecules distributed within the section are clearly imaged and analyzed with the characteristic iron edge.
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PMID:Electron energy loss chemical mapping of low Z elements in biological sections. 663 71


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