Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:1.11.1.7 (peroxidase)
 65,474 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Rat chloroma cells have been propagated in permanent suspension cultures and are grown in Dulbecco's modified Eagle's medium with 10% fetal calf serum and 2.5% horse serum. Several lines have been established; the one of longest duration, Mia C51, has been maintained for over 18 months and has undergone over 100 transfers. Mia C51 cells have a doubling time of 12 hr and maintain many of the properties of the parent tumor, including the characteristic greenish color with high myeloperoxidase activity, an an aneuploid chromosomal pattern, and intact tumorigenicity. They will uniformly produce greenish chloroma tumors when injected into newborn rats. Electron microscopic examination of chloroma tumors and the cultured cells derived from them reveal the presence of extracellular mature and immature type C virus particles morphologically typical of oncornaviruses. Chloroma cells obtained from tumors that lost their alkaline phosphatase activity after repeated transfer regain full activity in culture. Studies using the antigen-antibody crossed electrophoresis indicate that the loss of alkaline phosphatase activity represents a true decrease in alkaline phosphatase protein, which is restored under culture conditions. The availability of a permanent chloroma cell line in culture that maintains the biological properties of the parent tumor provides a useful model for the study of myeloid leukemia.
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PMID:Characteristics of rat carcinoma in culture. 16 71

Chloroma (chloroleukemia) was induced in a splenectomized rat by repeatedly administering dimethylbenz(a)anthracene (DMBA) and was serially transplanted thereafter. Composed of immature myeloid cells, the tumor imparted a green discoloration to the tissues that it infiltrated extensively. Chloroma cells fluoresced red in ultraviolet light, produced a characteristic curve in spectrophotometry, and contained large amounts of myeloperoxidase. They included numerous intracytoplasmic granules of both types A and B, which contained occasional crystalline bars. Permanent lines of chloroma cells were established in tissue culture. These cells, while maintaining their initial morphology, ceased producing myeloperoxidase and subsequently induced white tumors when they were isotransplanted.
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PMID:Myeloperoxidase and crystalline bodies in the granules of DMBA-induced rat chloroma cells. 433 20

Chloroma (granulocytic sarcoma or myeloid sarcoma) is a rare malignant extra-medullary neoplasm of myeloid precursor cells. It is usually associated with myeloproliferative disorders but very rarely may precede the onset of leukaemia. Here we are presenting a rare case of chloroma in a female patient without initial presentation of AML. 38 year old female patient, with performance score-1 had complaining of per vaginal bleeding for 1-2 days. Patient consulted gynaecologist and underwent biopsy from anterior fornix of vagina. Biopsy material was positive for LCA (leukocyte common antigen), MPO (myeloperoxidase), c-kit positive on IHC (immunohistocytochemistry) while negative for cytokeratin, synaptophysin, chromogranin, CD20 (cluster of differentiation. Whole body CT scan was non informative except mass lesion at vagina. Patient was given 3+7 induction chemotherapy which was tolerated well followed by high dose cytarabine as consolidation therapy.
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PMID:Primary Vaginal Chloroma: A Rare Case Report. 3059 16