Quantification of some trace elements in humans

人体中某些微量元素的定量

• 批准号: 249583-2006
• 负责人: PejovicMilic, Ana
• 金额: $ 2.08万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=335580
• 关键词: Quantification; some; trace; elements; humans

This research concentrates on the further development, evaluation, validation and application of the new techniques for in vivo measurements of  trace and toxic elements in human bone. Measurements are non-invasive, no sample is taken, nor is there discomfort to the patient.   A beneficial effect of low strontium doses has been recently found in osteoporosis patients.  At intermediate and high doses, strontium can induce diseases such as osteomalacia in renal patients and rickets in children. The in vivo X-ray fluorescence technique has been developed to measure strontium stored in the bone. We would like to further develop and improve the sensitivity of the technique, and facilitate its clinical application to benefit patients suffering from osteoporosis.    Aluminum and manganese are toxic elements. It is documented that increased aluminum levels are detected in dialysis patients causing a variety of health problems and deaths. Furthermore, it has been vigorously debated whether aluminum in any form is associated with Alzheimer's disease. Manganese is essential to human life, in particular, to neurological and skeletal functions. Exposure to manganese at low levels for a prolonged period of time can result in milder neurological symptoms than those seen in manganism, Parkinson's disease like syndrome: including memory deficit, loss of motor control and reduction in the refinement of certain bodily motions. To measure the elements concentration, in vivo neutron activation analysis of bone is developed using a low-energy accelerator. A critical feature of this technique is that the interfering reactions are not energetically permitted. This research project focuses on, but is not limited to: a further system development and an in vivo pilot study of the new techniques of in vivo measurements of elements in human bone.

本研究的重点是进一步发展，评估，验证和应用的新技术，在体内测量人体骨骼中的微量和有毒元素。测量是非侵入性的，不需要取样，也不会给患者带来不适。 最近发现低剂量锶对骨质疏松症患者有益，中、高剂量锶可诱发肾病患者骨软化症和儿童佝偻病等疾病。体内X射线荧光技术已被开发用于测量储存在骨中的锶。我们希望进一步发展和提高该技术的灵敏度，并促进其临床应用，以造福骨质疏松症患者。 铝和锰是有毒元素。据记载，在透析患者中检测到铝水平升高，导致各种健康问题和死亡。此外，人们一直在激烈地争论铝是否以任何形式与阿尔茨海默病有关。锰对人类生命至关重要，特别是对神经和骨骼功能。长时间暴露于低水平的锰会导致比锰中毒、帕金森病样综合征更轻微的神经系统症状：包括记忆缺陷、运动控制丧失和某些身体动作的精细化减少。为了测量元素浓度，使用低能加速器开发了骨的体内中子活化分析。该技术的一个关键特征是，干扰反应在能量上是不允许的。该研究项目的重点是，但不限于：进一步的系统开发和人体骨元素体内测量新技术的体内试验研究。