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Lancet Oncol:乳腺癌药物依西斯坦或致骨质疏松

2012-02-11 MedSci MedSci原创

 MedSci评论:  依西斯坦作为芳香酶抑制剂类药物,它干扰女性分泌雌激素,因此认为可以用于乳腺癌的防治。但是雌激素是人体必需要激素,在女性中对维持骨骼代谢,甚至美容中均起关键作用!单一抑制雌激素,自然会导致“雌激素缺乏”相关病症的发生。那么未来能不能在监测雌激素浓度的基础上,进行适度使用?! 2月7日,英国《柳叶刀肿瘤》(Lancet Oncology)网站刊登了加

 MedSci评论:
 依西斯坦作为芳香酶抑制剂类药物,它干扰女性分泌雌激素,因此认为可以用于乳腺癌的防治。但是雌激素是人体必需要激素,在女性中对维持骨骼代谢,甚至美容中均起关键作用!单一抑制雌激素,自然会导致“雌激素缺乏”相关病症的发生。那么未来能不能在监测雌激素浓度的基础上,进行适度使用?!

2月7日,英国《柳叶刀肿瘤》(Lancet Oncology)网站刊登了加拿大研究者的新发现,广泛用于美欧国家的乳腺癌抗癌药依西斯坦可能加速骨质疏松。

依西斯坦(Exemestane)是一种芳香酶抑制剂类药物,商品名阿诺辛(Aromasin),可抑制女性分泌乳腺癌癌细胞生长所需的雌激素,实现抗癌效果,主要用于防治乳腺癌患者复发,或用于高危人群预防乳腺癌。

所谓高危人群,是指一些有明显乳腺癌家族史的人。在美欧国家,依西斯坦已经成为不少老年女性预防乳腺癌的常规药物。

加拿大医学专家在对4500名服用这类药物的健康女性展开数年随访调查后发现,依西斯坦可将罹患乳腺癌的风险降低三分之二,但同时可导致明显骨质疏松。

在服用依西斯坦两年后,诊察发现,服药者腕关节、胫骨等骨质密度明显下降,一些人骨头外层的骨皮质密度甚至出现高达8%的降幅。

骨皮质密度直接关联骨质坚硬度和柔韧度,老年骨折病例中,八成病例缘于骨皮质密度下降。

“考虑用依西斯坦预防乳腺癌的女性应当同时考量效果和风险,”多伦多健康网络大学研究者安杰拉·张在报告中说,“对于正在服用依西斯坦的女性而言,定期检查骨密度、适量补钙、补充维生素D相当重要。”

doi:10.1016/S1470-2045(12)70030-X
Bone loss associated with prevention of breast cancer

Jane A Cauley 

Aromatase inhibitors are the standard of care for the treatment of most postmenopausal women with early stage hormone-receptor-positive breast cancer. 1 These drugs, in general, have a favourable side-effect profile, and are not associated with increased gynaecological or thromboembolism risks compared with selective oestrogen receptor modulators. The side-effects of aromatase inhibitors relate to the musculoskeletal system—loss of areal bone mineral density (BMD) and an increased risk of fracture ...

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    2015-09-27 chuchaii

    What a joy to find such clear thikinng. Thanks for posting!

    0

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    2012-03-07 howi
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    2012-12-02 minlingfeng
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    2012-02-13 Eleven17

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