Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P39060 (endostatin)
 2,284 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Circulating endothelial cells (CECs) were evaluated by flow cytometry in immunodeficient mice bearing human lymphoma. A trend toward higher CEC values was observed on days 7 and 14 after transplant, and differences versus controls were highly significant on day 21 (P = 0.0061). A strong correlation was found between CEC and tumor volume (r, 0.942; P = 0.004) and between CEC and tumor-generated VEGF (r, 0.669; P = 0.02). In mice given cyclophosphamide, most of the circulating apoptotic cells were hematopoietic and not endothelial. Conversely, in mice given endostatin, all of the increase in apoptotic cells was in the endothelial cell compartment. CEC evaluation is promising as a noninvasive, surrogate angiogenesis marker.
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PMID:Kinetics and viability of circulating endothelial cells as surrogate angiogenesis marker in an animal model of human lymphoma. 1138 57

In this review, the cellular and molecular mechanisms underlying angiogenesis in lymphoproliferative disorders are summarized, alongside with possible therapeutic applications. Although most of the initial studies in angiogenesis were done on solid tumors, recent data demonstrate the importance of angiogenesis in hematological malignancies including leukemia, lymphoma, and multiple myeloma. Expression of angiogenic polypeptides vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) correlate with clinical characteristics in leukemia and lymphoma, and their serum concentrations serve as predictors of poor prognosis. Antiangiogenic drugs, including thalidomide, arsenic trioxide, endostatin, vasostatin, and neutralizing antibodies to VEGF receptors, used alone or in combination with established chemo- or immunotherapy regimens, constitute a promising approach for the treatment of lymphoproliferative disorders.
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PMID:Angiogenesis in lymphoproliferative disorders. 1181 16

Many new biotherapy agents to treat cancer are being studied as single agents and in combination with conventional cancer therapy, such as chemotherapy. These agents include the monoclonal antibodies, rituximab, trastuzumab, alemtuzumab, and IMC-C225. Radioimmunotherapy, a type of biotherapy that combines a radioactive isotope with a monoclonal antibody, also is being studied and has shown promise in the treatment of lymphoma. A tyrosine kinase inhibitor, STI 571, has been approved recently by the U.S. Food and Drug Administration. Several vaccines as cancer treatment are currently under investigation. Other biotherapy agents being investigated include angiogenesis inhibitors, such as endostatin, antivascular endothelial cell growth factor, and thalidomide, an agent that inhibits the formation of blood vessels that supply tumors.
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PMID:New agents and future directions in biotherapy. 1184 84

Endostatin prevents angiogenesis and tumor growth by inhibiting endothelial cell proliferation and migration. The purpose of this study was to determine serum endostatin concentrations in 53 healthy dogs and in 38 dogs with confirmed malignant neoplasms. Endostatin concentration was determined with a competitive enzymatic immunoassay (EIA) with rabbit polyclonal antibody generated against a recombinant canine endostatin protein. Both the presence of cancer and increasing age were associated with increased serum concentration of endostatin. Endostatin concentration in healthy dogs was 87.7 +/- 3.5 ng/mL. Upper and lower limits of the reference range for serum endostatin concentration in healthy dogs were 60 and 113 ng/mL. Dogs with lymphoma (LSA) and hemangiosarcoma (HSA) had endostatin concentrations of 107 +/- 9.3 ng/mL. In conclusion, this study demonstrates that endostatin can be quantified in dogs and that endostatin concentrations are high in dogs with HSA and LSA.
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PMID:Endostatin concentrations in healthy dogs and dogs with selected neoplasms. 1232 7

Measurement of tumor angiogenesis to predict and/or to assess the efficacy of antiangiogenic therapies is mainly based on the evaluation of microvessel density (MVD). We developed a novel flow cytometry procedure to measure circulating endothelial cells (CECs) and circulating endothelial cells progenitors (CECPs) in either preclinical and clinical studies. Preclinical studies were performed on an animal model of human lymphoma. A trend toward higher CECs values was observed on day 7 and 14 after transplant, and differences vs controls were highly significant on day 21 (p = 0.0061). A strong correlation was found between CECs and tumor volume (r = 0.942, p = 0.004) and between CECs and tumor-generated VEGF (r = 0.669, p = 0.02). In mice given cyclophosphamide, most of circulating apoptotic cells were hematopoietic and not endothelial. Conversely, in mice given endostatin, all of the increase in apoptotic cells was in the endothelial cell compartment. In a parallel study, we looked for CECs in the peripheral blood of 20 healthy controls and 76 newly diagnosed cancer patients by means of four-color flow cytometry. In breast cancer (n = 46) and lymphoma (n = 30) patients, both resting and activated CECs were increased by 5 fold (P < 0.0008 vs control). CECs significantly correlated with plasma levels of VCAM-1 and VEGF. Resting and activated CECs were similar to healthy controls in 7 lymphoma patients achieving complete remission after chemotherapy, and activated CECs were found to decrease in 13 breast cancer patients evaluated before and 24h after quadrantectomy. In conclusion, our findings indicate a close relation between CEC increase and tumor progression, and support CECs evaluation as a clinically relevant, non invasive angiogenesis marker. Furthermore, this assay offers insight into anti-angiogenic activity of different drugs.
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PMID:Circulating endothelial cells as a novel marker of angiogenesis. 1267 13

Peripheral T cell lymphoma (PTCL) has a poor prognosis. Overexpression of vascular endothelial growth factor (VEGF) might contribute to the poor prognosis of PTCL and could be the target of novel therapy. The efficacy and safety of recombinant human endostatin (Endostar) in combination with cyclophosphamide, doxorubicin, vincristine and prednisone (ECHOP) have been explored in 15 PTCL patients. The objective response rate was 80%, with 53.3% patients having achieved complete response (CR) rate. The CR rate was 100% (3/3) in angioimmunoblastic T cell lymphoma (AITL) patients compared to only 36.4% (4/11) in PTCL not otherwise specified (PTCL-NOS) patients. With a median follow-up of 69 months, the 5-year progression-free survival and overall survival (OS) were 53% and 60%, respectively. The 5-year OS was 100% in AITL but was only 45% in PTCL-NOS. Seven out of 11 patients showed overexpression of VEGFR2 in their tumor vessels and had a better efficacy than those with low expression of VEGFR2. Grade 3 or 4 neutropenia is the most common toxicity observed. ECHOP was safe and might display potential benefit in AITL patients.
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PMID:Recombinant human endostatin in combination with CHOP regimen for peripheral T cell lymphoma. 2805 48