推荐回答(4个)
锶是人体内的一种微量元素,绝大多数锶都存于骨组织中。它可以调节骨组织的结构,改善骨的强度,促进骨细胞的生理活性。试验研究证实锶盐具有抗骨吸收和增加骨形成的作用,锶盐可以抑制破骨细胞的活性,促进成骨细胞的活性,促进骨盐的沉积;其与羟基磷灰石和磷酸三钙等复合后,其机械强度、溶解性及诱导成骨能力等特性明显得到改善;锶盐口服有治疗骨质疏松症的作用。结论:锶对于骨细胞生长分化和骨基质吸收沉积都有不可替代的生理作用,应在骨组织工程的研发中给予必要的重视.
我国GB8537-1995标准规定锶含量大于0.2毫克/升为锶矿泉水,其限量指标为小于5毫克/升。
人体所有的组织都含有锶。锶对人体的功能主要是与骨骼的形成密切相关,为人体骨骼及牙齿的正常组成部分。它与血管的功能及构造也有关系,其作用机制可能是锶在肠内与钠竞争吸收部位,从而减少人体对钠的吸收,增加钠的排泄。体内钠过多,易引起高血压、心血血管疾病,而锶却能减少人体对钠的吸收,故也有预防疾病之作用。
锶还与神经及肌肉的兴奋有关,临床上曾用各种化合物荨麻疹和副甲状腺功能不全而引起的抽搐症。5毫克/升以下的含锶矿泉水,有益于人体健康,而又不会产生不良的作用.
人体所有的组织都含有锶。锶对人体的功能主要是与骨骼的形成密切相关,为人体骨骼及牙齿的正常组成部分。它与血管的功能及构造也有关系,其作用机制可能是锶在肠内与钠竞争吸收部位,从而减少人体对钠的吸收,增加钠的排泄。体内钠过多,易引起高血压、心血血管疾病,而锶却能减少人体对钠的吸收,故也有预防疾病之作用。锶还与神经及肌肉的兴奋有关,临床上曾用各种化合物荨麻疹和副甲状腺功能不全而引起的抽搐症。
我国GB8537-1995标准规定锶含量大于0.2毫克/升为锶矿泉水,其限量指标为小于5毫克/升
5毫克/升以下的含锶矿泉水,有益于人体健康,而又不会产生不良的作用.巴马寿河泉锶型矿泉水产自世界长寿之乡——中国.巴马,其锶的含量为0.4毫克/升——1毫克/升,是一种非常合适通过食物补充锶微量元素的产品,比起保健品来效果更直接
锶对骨骼的具体作用
研究表明,锶可调节 骨髓间充质干细胞向成骨细胞分化,并促进骨基质蛋白的合成和沉淀。因此锶对成骨细胞分化和骨生成促进作用。骨骼中,锶能取代钙化组织骨骼和牙齿羟基磷灰石晶体中少量的钙, 锶元素的适量掺入可提高骨质的机械性能,在硬度方面的提高更明显, 这可能是由于少量锶元素的置换,在一定程度上减少了晶格缺陷, 使原子间的排列更加紧密,起到一定强化作用,从而改善骨的机械强度。
锶对成骨细胞和破骨细胞的作用
成骨细胞和破骨细胞间协调的相互作用是调节骨重建、 维持骨骼的稳定性和完整性的关键。研究发现锶能够用至少两种机制增加前成骨细胞和多功能干细胞增殖。另外,在骨质疏松动物模型中,锶可改善骨代谢,预防骨丢失,提高骨质疏松动物的骨质量。
锶与心血管疾病
研究表明,饮用水中锶水平越低,心血管疾病死亡率越高。饮用水中锶在5.0-10.0mg/L 时,心血管疾病病死率最低。饮用水及尿液中锶水平与高血压性心脏病呈显著负相关;饮用水中钠 / 锶比值与中枢神经系统血管损伤、动脉硬化、退行性心脏病、高血压性心脏病呈显著正相关;尿钠/ 锶比值与全身性动脉硬化呈显著负相关。其作用机制可能是锶在肠内与钠竞争性吸收,从而减少钠的吸收,增加体内钠的排泄。人体内钠过多, 易引起高血压及心血管疾病, 而锶却能减少人体对钠的吸收,故有预防心血管疾病的作用。
喝喝陈沟水,富含锶、钠、镁
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