Elevated homocysteine in African American Prostate Cancer: Association with Diet and Dietary practices, evaluating its biomarker potential, and characterizing its tumor promoting function

项目总结/摘要 我们的研究计划的长期目标是减少前列腺癌对非洲人的不成比例的影响。 美国男人在我们已发表和即将发表的研究中，我们发现， 代谢产物同型半胱氨酸与具有较高西非血统的男性显著相关， 临床前列腺癌标志物前列腺特异性抗原水平升高， 前列腺癌我们的研究进一步揭示了维生素B6水平的显着降低和独特的饮食 非裔美国人的做法谁是在高风险发展前列腺癌。此外，我们还展示了一种可能的 同型半胱氨酸升高在促进前列腺肿瘤向骨转移（或扩散）中的作用， 主要见于非裔美国患者。 基于这些发现，在本申请中，我们提出确定不同饮食之间的关联， 实践和同型半胱氨酸水平升高以及非裔美国人患前列腺癌的可能性 男人此外，我们建议确定升高的同型半胱氨酸在促进生长中的生物学作用， 和非洲裔美国人前列腺癌的发展。我们还将评估综合水平的能力， 三种代谢物：同型半胱氨酸，蛋氨酸和维生素B6，在血浆中，以检测前列腺癌的早期， 非裔美国人 这项研究的影响取决于了解饮食和饮食模式在导致前列腺癌中的作用 风险和发展健康生活方式干预的潜力（例如，饮食调整，维生素B6 补充等）以降低AA男性患前列腺癌的风险。从长远来看，同型半胱氨酸和 维生素B6可作为筛选AA男性前列腺癌高危人群的标志物。

Project Summary/Abstract Our research plan's long-term objective is to reduce the disproportionate effects of prostate cancer on African American men. In our published and yet to be published studies, we have found that increased levels of a metabolite homocysteine were significantly associated with men with higher West African ancestry who have elevated levels of the clinical prostate cancer marker prostate-specific antigen and who have been diagnosed with prostate cancer. Our work further reveals significantly reduced levels of vitamin B6 and unique dietary practices in African American men who are at high risk of developing prostate cancer. Also, we show a possible role for elevated homocysteine in promoting metastasis (or spread) of the prostate tumors to the bone, which is predominantly seen in African American patients. Based on these findings, in this application, we propose determining the association between different dietary practices and elevated levels of homocysteine and the likelihood of having prostate cancer in African American men. In addition, we propose to determine the biological role of elevated homocysteine in promoting the growth and development of African American prostate cancer. We will also evaluate the ability of combined levels of three metabolites: homocysteine, methionine, and vitamin B6, in plasma, to detect prostate cancer early in African American men. This study's impact relies on understanding the role of diet and dietary patterns in contributing to prostate cancer risk and the potential to develop healthy lifestyle interventions (e.g., dietary modification, vitamin B6 supplementation, etc.) to mitigate the risk of developing PCa in AA men. In the longer term, homocysteine and vitamin B6 could be set as markers to screen AA men at higher risk of developing PCa.