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Lesinurad与非布索坦协同降血尿酸作用明显
发布日期: 2014-03-28
   

  Lesinurad (RDEA594)是一种促尿酸排泄口服药,通过抑制肾近曲小管的尿酸转运子URAT1而治疗有高尿酸血症的痛风患者。通过对超过500例健康人和痛风患者的研究发现,Lesinurad以剂量依赖性降低血尿酸,且耐受性良好。非布索坦是一种黄嘌呤氧化酶抑制剂,被批准用于痛风的高尿酸治疗。既往对健康志愿者的研究发现,(200-400) mg的Lesinurad与40 mg非布索坦联合治疗的耐受性良好,并可明显降低尿酸。

经过降尿酸药洗脱期后,对21例伴血尿酸>8 mg/dl的痛风患者进行了研究。患者在开始降尿酸治疗前至少1周用秋水仙碱0.6 mg/d,并持续用4周来预防痛风发作。第一组的12例患者用非布索坦40 mg qd,第二组的9例患者用非布索坦80 mg qd。两个组均在第1-7天单独用非布索坦,然后在第8-14天加用lesinurad 400 mg。第15-21天加用lesinurad 600 mg。每周周末测定尿酸、尿尿酸和黄嘌呤/次黄嘌呤分泌及完整的药代动力学谱。通过副作用、临床化验结果、生命体征、心电图和体格检查来评价安全性。

结果发现,2组基线时平均尿酸值不同:第一组为9.2 mg/dl,第二组为10.4 mg/dl,单独用非布索坦40 mg和80 mg可分别降低尿酸35%和47%。非布索坦40 mg加lesinurad 400 mg或600 mg可分别降低血尿酸56% 和61%,使尿酸<6及<5 mg/dl的达标率为100%,血尿酸<4 mg/dl的达标率为64%。非布索坦80 mg加lesinurad 400 mg或600 mg可分别降低血尿酸65%和73%,使血尿酸<6、<5和<4 mg/dl的达标率为100%。最高剂量的联合后8-12小时血尿酸降低高达81%,使平均血尿酸达1.9 mg/dl。加lesinurad使非布索坦的血浆水平增高10-30%,但非布索坦的半衰期无改变。非布索坦对lesinurad的药代动力学无作用。而非布索坦单独降低尿酸分泌>50%,合用lesinurad可增加尿尿酸的分泌。lesinurad 和FBX联合耐受性良好,无严重不良反应,也无因副作用而停药。

研究结果显示,所有lesinurad与非布索坦联合均可使血尿酸<6 mg/dl的达标率为100%,而单独用非布索坦不能达标,高剂量的联合则使血尿酸<4 mg/dl的达标率达100%,这能加速改善痛风症状,并加速痛风石的溶解。

 

Lesinurad (RDEA594)是一种促尿酸排泄口服药,通过抑制肾近曲小管的尿酸转运子URAT1而治疗有高尿酸血症的痛风患者。通过对超过500例健康人和痛风患者的研究发现,Lesinurad以剂量依赖性降低血尿酸,且耐受性良好。非布索坦是一种黄嘌呤氧化酶抑制剂,被批准用于痛风的高尿酸治疗。既往对健康志愿者的研究发现,(200-400) mg的Lesinurad与40 mg非布索坦联合治疗的耐受性良好,并可明显降低尿酸。

经过降尿酸药洗脱期后,对21例伴血尿酸>8 mg/dl的痛风患者进行了研究。患者在开始降尿酸治疗前至少1周用秋水仙碱0.6 mg/d,并持续用4周来预防痛风发作。第一组的12例患者用非布索坦40 mg qd,第二组的9例患者用非布索坦80 mg qd。两个组均在第1-7天单独用非布索坦,然后在第8-14天加用lesinurad 400 mg。第15-21天加用lesinurad 600 mg。每周周末测定尿酸、尿尿酸和黄嘌呤/次黄嘌呤分泌及完整的药代动力学谱。通过副作用、临床化验结果、生命体征、心电图和体格检查来评价安全性。

结果发现,2组基线时平均尿酸值不同:第一组为9.2 mg/dl,第二组为10.4 mg/dl,单独用非布索坦40 mg和80 mg可分别降低尿酸35%和47%。非布索坦40 mg加lesinurad 400 mg或600 mg可分别降低血尿酸56% 和61%,使尿酸<6及<5 mg/dl的达标率为100%,血尿酸<4 mg/dl的达标率为64%。非布索坦80 mg加lesinurad 400 mg或600 mg可分别降低血尿酸65%和73%,使血尿酸<6、<5和<4 mg/dl的达标率为100%。最高剂量的联合后8-12小时血尿酸降低高达81%,使平均血尿酸达1.9 mg/dl。加lesinurad使非布索坦的血浆水平增高10-30%,但非布索坦的半衰期无改变。非布索坦对lesinurad的药代动力学无作用。而非布索坦单独降低尿酸分泌>50%,合用lesinurad可增加尿尿酸的分泌。lesinurad 和FBX联合耐受性良好,无严重不良反应,也无因副作用而停药。

研究结果显示,所有lesinurad与非布索坦联合均可使血尿酸<6 mg/dl的达标率为100%,而单独用非布索坦不能达标,高剂量的联合则使血尿酸<4 mg/dl的达标率达100%,这能加速改善痛风症状,并加速痛风石的溶解。

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