李坤艷等
[摘要] 目的 分析中國健康受試者單劑量或多次口服奧美沙坦酯后體內(nèi)藥代動力學(xué)的特征。 方法 單劑量實(shí)驗(yàn):12名篩選合格的受試者,采用開放、隨機(jī)、單劑量、三周期、3×3拉丁方設(shè)計方法將試驗(yàn)分為3組,每組4名,每周期分別服用相對應(yīng)劑量的藥物,且每周期服藥前經(jīng)過7 d的洗脫期。多次給藥試驗(yàn):12名健康受試者每天服用20 mg奧美沙坦酯,連續(xù)4 d。采集服藥前0 h及服藥后48 h內(nèi)的血樣,分析體內(nèi)藥物各PK參數(shù)。 結(jié)果 單劑量服用奧美沙坦
[關(guān)鍵詞] 奧美沙坦酯;藥代動力學(xué);中國人
[中圖分類號] R969.1 [文獻(xiàn)標(biāo)識碼] A [文章編號] 1674-4721(2014)08(a)-0013-04
Pharmacokinetic study of olmesartan medoxomil in healthy Chinese subjects after single and multiple administrations
LI Kun-yan QIU Yu JIANG Yun LUO Cheng-hui YANG Nong LIN Xiao-ping ZHOU Chun-hua WANG Jing
GCP Center,Hunan Cancer Hospital;the Affiliated Cancer Hospital of Xiangya School of Medicine,Central South University,Changsha 410006,China
[Abstract] Objective To investigate pharmacokinetic characters of olmesartan medoxomil in healthy Chinese subjects after single and multiple administrations. Methods A single dose experiment:12 screening qualified subjects,the test wass divided into three groups by randomized-sequence,single-dose,3-treatment,3-period crossover design,each group of 4 peoples,each cycle respectively corresponding to the dose of drugs,and each cycle after 7 d washout period before taking the medicine.Multiple dosing test:12 healthy subjects were given 20 mg olmesartan medoxomil every day,continuous 4 d.Collected 0 h before taking the medicine and medication after blood analysis within 48 h of drugs in vivo PK parameters. Results Single dose olmesartan medoxomil (20,40,80 mg) after the maximum concentration in plasma (Cmax) were respectively (1016±349),(1503±266),(2516±1196) ng/ml,1/2 level elimination half-life (t1/2) for (5.2±1.2),(5.6±1.6),(6.2±0.9) h,after multiple dose olmesartan medoxomil,the Cmax and t1/2 was (894±301) ng/ml,(6.4±1.2) h respectively,single dose and t1/2 level differences between multiple dosing has no statistical significance.A single dose experiment,when within 20 to 80 mg dose,AUC0-∞,AUC0-48 and Cmax PK parameters with a linear relationship between dose of drug. Conclusion Olmesartan medoxomil has no accumulation in healthy Chinese subjects after 20 mg multiple-dose.
[Key words] Olmesartan medoxomil;Pharmacokinetics;Chinese
奧美沙坦酯是一個新型血管緊張素Ⅱ受體拮抗劑類抗高血壓前藥,臨床顯示有較好的安全性和有效性。體外以前體藥物奧美沙坦酯形式存在,進(jìn)入體內(nèi)后通過腸壁、門靜脈、肝臟等部位芳基酯酶脫酯作用轉(zhuǎn)化成有藥理活性的化合物奧美沙坦而發(fā)揮藥理作用[1-3]。美國、歐洲、日本等國家已經(jīng)對奧美沙坦體內(nèi)藥代動力學(xué)特征進(jìn)行了較多的研究[4-11],研究結(jié)果顯示,奧美沙坦在西方人和日本人體內(nèi)的藥代動力學(xué)特征沒有種族差異性,但檢索國內(nèi)關(guān)于奧美沙坦藥代動力學(xué)研究時,發(fā)現(xiàn)有相關(guān)研究顯示,奧美沙坦在人體內(nèi)的藥動學(xué)特征具有一定的種族差異性[12-15]。研究數(shù)據(jù)顯示,中國人服用單劑量奧美沙坦20 mg后,中國人體內(nèi)的藥物吸收速度和吸收程度均比西方人和日本人高,且消除速度也更快。這些發(fā)現(xiàn)對重新考慮奧美沙坦酯說明書關(guān)于中國人服用奧美沙坦的劑量與國外人群的劑量相同為每天20~40 mg的合理性提出質(zhì)疑。但是目前沒有更多相關(guān)研究證實(shí)上述這一結(jié)果,也沒有關(guān)于中國人日服用>20 mg奧美沙坦時藥代動力學(xué)的分析研究。本研究主要研究目的是驗(yàn)證在中國健康受試者體內(nèi)服用20 mg奧美沙坦后的各藥代動力學(xué)參數(shù)和分析在20~80 mg劑量范圍內(nèi)中國人體內(nèi)奧美沙坦的藥代動力學(xué)特征。
1 資料與方法
1.1 一般資料
12名健康中國受試者,男女各半,年齡20~25歲,體重51~60 kg,研究前均簽訂知情同意書。受試者均不吸煙,且無明顯的臨床疾病史,無心、肝、腎、消化道、神經(jīng)系統(tǒng)、代謝系統(tǒng)以及精神異常等疾病,體格檢查顯示血壓、心率、心電圖、呼吸狀況、肝腎功能、血常規(guī)、尿常規(guī)等均無有臨床意義的異常;HIV、肝炎病毒B、C檢測均為陰性;女性受試者妊娠檢測為陰性。
1.2 試驗(yàn)設(shè)計
本研究闡述了在中國健康受試者體內(nèi)單劑量或多次服用奧美沙坦酯的藥代動力學(xué)特征,在劑量20~80 mg范圍,奧美沙坦酯的藥代動力學(xué)與劑量呈線性關(guān)系。多次服用奧美沙坦酯20 mg后,體內(nèi)無蓄積作用。中國人體內(nèi)奧美沙坦t1/2比西方人和日本人快2倍;相反,中國人體內(nèi)奧美沙坦吸收比率比其高2倍。
[參考文獻(xiàn)]
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[22] Rohatagi S,Carrothers TJ,Kshirsagar S,et al.Evaluation of population pharmacokinetics and exposure-response relationship with coadministration of amlodipine besylate and olmesartan medoxomil[J].J Clin Pharmacol,2008,48(7):823-836.
[23] Mizuno M,Sada T,Ikeda M,et al.Pharmacology of CS-866,a novel nonpeptide angiotensin Ⅱ receptor antagonist[J].Eur J Pharmacol,1995,285(2):181-188.
(收稿日期:2014-06-12 本文編輯:林利利)
[12] Jiang J,Liu D,Hu P.Pharmacokinetic and safety profile of olmesartan medoxomil in healthy Chinese subjects after single and multiple administrations[J].Pharmazie,2009, 64(5):323-326.
[13] Li KY,Liang JP,Hu BQ,et al.The relative bioavailability and fasting pharmacokinetics of three formulations of olmesartan medoxomil 20 mg capsules and tablets in healthy Chinese male volunteers:an open-label,randomized-sequence,single-dose,three-way crossover study[J].Clin Ther,2010,32(9):1674-1680.
[14] 萬茜,黃原原,付志敏,等.奧美沙坦氫氯噻嗪片在中國健康志愿者體中的藥代動力學(xué)[J].中國臨床藥理學(xué)與治療學(xué),2011,16(4):393-399.
[15] 于洋,胡玉欽,劉建芳,等.單劑量口服奧美沙坦酯片在中國健康志愿者體內(nèi)的藥代動力學(xué)研究[J].解放軍醫(yī)藥雜志,2014,26(1):67-69.
[16] Tanaka H,Nagasawa Y,Matsui I,et al.Pharmacokinetics of olmesartan medoxomil in hemodialysis patients:little effect of dialysis upon its pharmacokinetics[J].Clin Exp Nephrol,2009,13(1):61-65.
[17] Rohatagi S,Lee J,Shenouda M,et al.Pharmacokinetics of amlodipine and olmesartan after administration of amlodipine besylate and olmesartan medoxomil in separate dosage forms and as a fixed-dose combination[J].J Clin Pharmacol,2008,48(11):1309-1322.
[18] Johnson JA.Predictability of the effects of race or ethnicity on pharmacokinetics of drugs[J].Int J Clin Phannacol Ther,2000,38(2):53-60.
[19] Gardner SF,F(xiàn)ranks AM.Olmesartan medoxomil:the seventh angiotensin receptor antagonist[J].Ann Pharmacother,2003,37(1):99-105.
[20] Brousil JA,Burke JM.Olmesartan medoxomil:an angiotensin Ⅱ-receptor blocker[J].Clin Ther,2003,25(4):1041-1055.
[21] Nakagomi-Hagihara R,Nakai D,Kawai K,et al.OATP1B1,OATP1B3 and mrp2 are involved in hepatobiliary transport of olmesartan,a novel angiotensin Ⅱ blocker[J].Drug Metab Dispos,2006,34(5):862-869.
[22] Rohatagi S,Carrothers TJ,Kshirsagar S,et al.Evaluation of population pharmacokinetics and exposure-response relationship with coadministration of amlodipine besylate and olmesartan medoxomil[J].J Clin Pharmacol,2008,48(7):823-836.
[23] Mizuno M,Sada T,Ikeda M,et al.Pharmacology of CS-866,a novel nonpeptide angiotensin Ⅱ receptor antagonist[J].Eur J Pharmacol,1995,285(2):181-188.
(收稿日期:2014-06-12 本文編輯:林利利)
[12] Jiang J,Liu D,Hu P.Pharmacokinetic and safety profile of olmesartan medoxomil in healthy Chinese subjects after single and multiple administrations[J].Pharmazie,2009, 64(5):323-326.
[13] Li KY,Liang JP,Hu BQ,et al.The relative bioavailability and fasting pharmacokinetics of three formulations of olmesartan medoxomil 20 mg capsules and tablets in healthy Chinese male volunteers:an open-label,randomized-sequence,single-dose,three-way crossover study[J].Clin Ther,2010,32(9):1674-1680.
[14] 萬茜,黃原原,付志敏,等.奧美沙坦氫氯噻嗪片在中國健康志愿者體中的藥代動力學(xué)[J].中國臨床藥理學(xué)與治療學(xué),2011,16(4):393-399.
[15] 于洋,胡玉欽,劉建芳,等.單劑量口服奧美沙坦酯片在中國健康志愿者體內(nèi)的藥代動力學(xué)研究[J].解放軍醫(yī)藥雜志,2014,26(1):67-69.
[16] Tanaka H,Nagasawa Y,Matsui I,et al.Pharmacokinetics of olmesartan medoxomil in hemodialysis patients:little effect of dialysis upon its pharmacokinetics[J].Clin Exp Nephrol,2009,13(1):61-65.
[17] Rohatagi S,Lee J,Shenouda M,et al.Pharmacokinetics of amlodipine and olmesartan after administration of amlodipine besylate and olmesartan medoxomil in separate dosage forms and as a fixed-dose combination[J].J Clin Pharmacol,2008,48(11):1309-1322.
[18] Johnson JA.Predictability of the effects of race or ethnicity on pharmacokinetics of drugs[J].Int J Clin Phannacol Ther,2000,38(2):53-60.
[19] Gardner SF,F(xiàn)ranks AM.Olmesartan medoxomil:the seventh angiotensin receptor antagonist[J].Ann Pharmacother,2003,37(1):99-105.
[20] Brousil JA,Burke JM.Olmesartan medoxomil:an angiotensin Ⅱ-receptor blocker[J].Clin Ther,2003,25(4):1041-1055.
[21] Nakagomi-Hagihara R,Nakai D,Kawai K,et al.OATP1B1,OATP1B3 and mrp2 are involved in hepatobiliary transport of olmesartan,a novel angiotensin Ⅱ blocker[J].Drug Metab Dispos,2006,34(5):862-869.
[22] Rohatagi S,Carrothers TJ,Kshirsagar S,et al.Evaluation of population pharmacokinetics and exposure-response relationship with coadministration of amlodipine besylate and olmesartan medoxomil[J].J Clin Pharmacol,2008,48(7):823-836.
[23] Mizuno M,Sada T,Ikeda M,et al.Pharmacology of CS-866,a novel nonpeptide angiotensin Ⅱ receptor antagonist[J].Eur J Pharmacol,1995,285(2):181-188.
(收稿日期:2014-06-12 本文編輯:林利利)