135459-87-9
135459-87-9 结构式
基本信息
雷奈酸锶
雷尼酸锶
5-[双(羧甲基)氨基]-2-羧基-4-氰基-3-噻吩乙酸二锶
S 12911
Protelos
S 12911-2
TrontiuMranelate
Srtontiumranelate
StrontiuM Ranelic
STRONTIUM RANELATE
Ranelate StrontiuM
StronitiuM ranelate
安全数据
常见问题列表
雷尼酸锶具有抑制骨吸收，促进骨形成的双重药理作用。一方面在成骨细胞富集的细胞中，能增大胶原蛋白与非胶原蛋白的合成，通过增强前成骨细胞的增殖而促进成骨细胞介导的骨形成。另一方面，通过降低破骨细胞分化和再吸收活性，减少骨吸收，从而使得骨更新重新达到平衡，有利于骨形成。
雷奈酸锶主要通过锶原子，发挥其药理作用，锶是一种与钙同族的碱土金属元素，在元素周期表中位于钙的下方。其吸收、分布、排泄与钙相似。口服2g以后。锶的绝对生物利用度为27％。大剂量的锶能使骨矿代谢发生异常，低剂量的锶能增强前成骨细胞复制，增加成骨细胞的数量，刺激骨形成；同时还能降低破骨细胞的活性，减少破骨细胞的数量，降低骨吸收的速率。在动物和人体内研究也得到的结果相吻合。
骨质疏松症（OP）是一种进行性骨骼疾病，其特征为骨密度（BMD）降低和骨组织显微结构发生退行性改变。表现为骨脆性提高和易发生骨折，后者以脊椎、髋部和腕处最为常见。妇女由于在停经后或者接受手术切除卵巢后，体内停止产生能保持骨质强硬的雌激素。因此，原发性OP在停经后或更年期妇女中尤为多见。
目前常用于治疗骨质疏松的药物有两类：一类为抑制破骨细胞活性从而抑制骨吸收的药物，如二膦酸盐、雌激素、降钙素等；第二类为促进成骨细胞活性从而刺激骨形成的药物，目前仅有人重组甲状旁腺素1-34一个产品上市，需要注射给药，药价较高。
| Target | Value |
| Calcium channel | 0.5 mM |
Strontium Ranelate (0.1-1 mM; 22 days; Mouse calvaria cells) treatment shows the expression of mRNA for early osteoblast markers (alkaline phosphatase, ALP) is visualized by day 5, while late markers (osteocalcin, OCN) are detectable only by day 15 and beyond.
Strontium Ranelate (0.1-1 mM; 22 days; Mouse calvaria cells) treatment results in significantly increases the mRNA expression of the osteoblastic markers ALP, BSP and OCN at day 22 of MC cell culture.
Strontium Ranelate is found to increase alkaline phosphatase activity and prostaglandin E2 production in a COX-2 dependent manner in murine marrow stromal cells.
RT-PCR
| Cell Line: | Mouse calvaria (MC) cells |
| Concentration: | 0.1 mM, 0.3 mM or 1 mM |
| Incubation Time: | 22 days |
| Result: | The expression of mRNA for early osteoblast markers (ALP) was visualized by day 5, while late markers (OCN) were detectable only by day 15 and beyond. |
Western Blot Analysis
| Cell Line: | Mouse calvaria (MC) cells |
| Concentration: | 0.1 mM, 0.3 mM or 1 mM |
| Incubation Time: | 22 days |
| Result: | Significantly increased the mRNA expression of the osteoblastic markers ALP, BSP and OCN at day 22 of MC cell culture. |
Strontium Ranelate increases bone formation and decreased bone resorption, which results in increased bone mass in the vertebrae of intact adult mice.
In intact adult rats, Strontium Ranelate also increases bone mass, as measured by dual-energy X-ray absorptiometry, in lumbar vertebra and femur, and this is confirmed by histological assessment of trabecular bone volume in the tibial metaphysis.
Strontium Ranelate is found to decrease bone resorption and to increase bone formation in alveolar bone in normal adult monkeys (Macaca fascicularis), which exhibits extensive bone remodeling.
In ovariectomized rats, short-term (3 months) treatment with Strontium Ranelate prevents trabecular bone loss induced by oestrogen deficiency, as demonstrated by bone ash, bone mineral content and histomorphometric analysis in the tibial metaphysis. This effect results from decreased bone resorption while bone formation was maintained. These beneficial effects of Strontium Ranelate on bone mass and microarchitecture in ovariectomized rats are confirmed in long-term experiments. In this long-term study (2 years), the increase in bone mass and microarchitecture induced by Strontium Ranelate results in a marked improvement in bone strength, supporting the beneficial effect of this drug on bone resistance.