Genotyping and functional analysis of the D104N variant of human endostatin
| Autor: | David J. Liewehr, William D. Figg, Gordon R. Macpherson, Arun S. Singh, William L. Dahut, David Venzon, Philip W. Kantoff, Michael E. Franks, Charles L. Bennett, Douglas K. Price |
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| Rok vydání: | 2004 |
| Předmět: |
Male
Heterozygote Umbilical Veins Cancer Research Neoplasms Hormone-Dependent Genotype Angiogenesis Molecular Sequence Data Angiogenesis Inhibitors Biology Cohort Studies Neovascularization Prostate cancer medicine Humans Amino Acid Sequence Survival rate Aged Genes Dominant Pharmacology Tube formation Neovascularization Pathologic Case-control study Endothelial Cells Prostatic Neoplasms Middle Aged medicine.disease Endostatins Survival Rate Oncology Case-Control Studies Immunology cardiovascular system Cancer research Molecular Medicine Human umbilical vein endothelial cell medicine.symptom Endostatin |
| Zdroj: | Cancer Biology & Therapy. 3:1298-1303 |
| ISSN: | 1555-8576 1538-4047 |
| DOI: | 10.4161/cbt.3.12.1453 |
| Popis: | Endostatin is an endogenous inhibitor of angiogenesis derived from the extracellular matrix protein collagen XVIII. It has been reported that a variation at the 104 position (D104N) of human endostatin is associated with an increased risk of prostate cancer, potentially indicating that this protein variant is less active as an anti-angiogenic agent. Herein we reported the results of genotyping 389 patients with androgen independent prostate cancer (AIPC) and 352 normal control individuals for D104N endostatin. There was no significant association between the frequency of 104N endostatin and the incidence of AIPC in either Caucasian or African American patients compared to controls (15% Caucasian AIPC versus 13.7% in Caucasian controls, p=0.79; 7.4% African American AIPC versus 5.6% in African American controls, p=0.64). Actuarial analysis revealed no statistically significant association between incidence of the DN heterozygous genotype and survival (p=0.62 by logrank test). To study the functional significance of the D104N conversion, we have expressed and purified insoluble recombinant human 104D and 104N endostatin and compared their respective activities in human umbilical vein endothelial cell (HUVEC) tube formation assays. The 104N variant of human endostatin inhibited HUVEC tube formation at least as well as the wild-type form. We concluded that the D104N variation in human endostatin is neither clinically relevant nor suitable as a pharmacogenomic endpoint to assess the risk for developing AIPC. |
| Databáze: | OpenAIRE |
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