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Statin 類藥物使用於中風病人之文獻回顧

作者:謝孟倉 (義大醫院神經科 醫師)

Statin 類藥物廣泛被使用在高血脂、高膽固醇的病人身上,已經有許多的證據顯示 Statin 類藥物可以減少心血管疾病的發生機會。Statin 類藥物可以有效抑制肝臟合成低密度膽固醇 ( LDL ),也可以抑制 LDL 氧化、減少巨噬細胞吞噬氧化 LDL、減少血小板凝集及減少動脈粥狀硬化 [1]。Statin 類藥物也可以改變 apolipoprotein B/A1 比例,可以有效降低心肌梗塞及梗塞性腦中風的機會 [2]。回溯性研究顯示,每降低 10% LDL,每年可以減少 0.76% 內頸動脈內膜增厚 [3]。

1. 使用 Statin 類藥物降低腦中風發生的證據

2009 年 Lancet Neurology 的 meta-analysis 中顯示,Statin 對於梗塞性腦中風的初級和次級預防都有幫助,對於出血性腦中風的預防則沒有統計學上的意義。每降低 10% 的 LDL,可以減少 7.5% 中風機會;每降低 1mmol/L 的 LDL ( 39mg/dl ),可以減少 21.1% 中風機會 [4]。其他 Statin 和腦中風相關研究的次分析及分組研究,結果如表一所示 [5-10]:

(表一)

2. Statin 類藥物的安全性考量

Statin 類藥物的副作用包括肝臟酵素 ( GOT 和 GPT )上升、肌酸激酶 ( CPK ) 上升、及肌肉系統病變。常見的肌肉系統副作用包含肌痛、肌肉病變、及橫紋肌溶解症。單獨使用 Statins 造成上述副作用的機會非常低,在 SPARCL Trial 中顯示,使用 Atorvastatin 只有肝臟酵素上升比例較使用安慰劑組高 ( 2.2% vs. 0.4% ),及他常見副作用及肌肉系統疾病,兩組之間並無差異。其中使用 Atorvastatin 造成肌痛比例為 5.5%,肌肉病變為 0.3%,橫紋肌溶解比例為 0.1% [10]。

另一個讓人擔心的問題是,Statins 可以降低缺血性腦中風發生,卻會增加出血性腦中風機會 [11]。在解讀這類資訊時,要考慮除了藥物之外,有沒有其他干擾因子 ( confunding factor )。一般造成出血性腦中風最大原因是高血壓,再詳細分析使用 Statins 發生出血性腦中風的病人,其中男性、年長者、及高血壓的比例都較使用 Statins 未發生出血性腦中風組高。值得注意的是,出血性腦中風病人使用 Statins 會大幅增加再一次出血性腦中風的機會 ( odds ratio: 5.81, p < 0.001 )。

3. 使用 Statins 在特殊病人族群

過去關於 Statins 的研究中,發現 Statins 可能會造成高血糖及增加新發生糖尿病的機會 [12],儘管如此,使用 Statins 在糖尿病病人,依舊可以降低中風 ( relative risk reduction 30% ) 及心血管疾病 ( relative risk reduction 51% ) 發生機會 [13]。

各家 Statins 研究結果都一致指出,慢性腎臟病病人使用 Statins 可以增加病人的eGFR [14,15],當病人合併有糖尿病和慢性腎臟病時,使用 Statins 可以減少eGFR的下降 [16]。

當頸動脈狹窄的病人使用 Statin 類藥物,不僅可以降低膽固醇,也可以減少腦中風和心血管疾病的發生。SPARCL Trial 指出,頸動脈狹窄病人使用 Statins ,中風相對風險下降率為 33%,心血管疾病為42% [17]。

4. The lower, the better

使用 Statins 後目標要將 LDL 降到多低,過去我們常聽到「the lower, the better」 這個口號,在各大學會努力之下,健保給付規定終於修改到和國際指引比較相近。在SPARCL Trial 中發現,當LDL下降超過50%,中風發生機會明顯下降,當LDL可以控制在70mg/dl以下,中風機會也明顯下降 (表二) [18]

(表二)

總結來說,Statins 對腦中風的初級和次級預防非常重要,有心血管危險因子或心血管疾病患者應檢測血脂濃度,並積極使用 Statin 類藥物。在糖尿病、慢性腎病、及頸動脈狹窄病人也建議使用 Statins。

參考資料:

  1. Stancu C, Sima A. Statins: mechanism of action and effects. J Cell Mol Med. 2001 Oct-Dec;5(4):378-87.
  2. Tu JV. Reducing the global burden of stroke: INTERSTROKE. Lancet. 2010 Jul 10;376(9735):74-5
  3. Amarenco P, Labreuche J, Lavallée P, Touboul PJ. Statins in stroke prevention and carotid atherosclerosis: systematic review and up-to-date meta-analysis. Stroke. 2004 Dec;35(12):2902-9
  4. Amarenco P, Labreuche J. Lipid management in the prevention of stroke: review and updated meta-analysis of statins for stroke prevention. Lancet Neurol 2009; 8: 453–63
  5. Randomised trial of cholesterol lowering in 4444 patients with coronary heart disease: the Scandinavian Simvastatin Survival Study (4S). Lancet. 1994 Nov 19;344(8934):1383-9
  6. Ridker PM, Danielson E, Fonseca FA, Genest J, Gotto AM Jr, Kastelein JJ, Koenig W, Libby P, Lorenzatti AJ, MacFadyen JG, Nordestgaard BG, Shepherd J, Willerson JT, Glynn RJ; JUPITER Study Group. Rosuvastatin to prevent vascular events in men and women with elevated C-reactive protein. N Engl J Med. 2008 Nov 20;359(21):2195-207
  7. Sever PS, Dahlöf B, Poulter NR, Wedel H, Beevers G, Caulfield M, Collins R, Kjeldsen SE, Kristinsson A, McInnes GT, Mehlsen J, Nieminen M, O'Brien E, Ostergren J; ASCOT investigators. Prevention of coronary and stroke events with atorvastatin in hypertensive patients who have average or lower-than-average cholesterol concentrations, in the Anglo-Scandinavian Cardiac Outcomes Trial--Lipid Lowering Arm (ASCOT-LLA): a multicentre randomised controlled trial. Lancet. 2003 Apr 5;361(9364):1149-58
  8. Colhoun HM, Betteridge DJ, Durrington PN, Hitman GA, Neil HA, Livingstone SJ, Thomason MJ, Fuller JH; CARDS Investigators. Rapid emergence of effect of atorvastatin on cardiovascular outcomes in the Collaborative Atorvastatin Diabetes Study (CARDS). Diabetologia. 2005 Dec;48(12):2482-5
  9. Waters DD, Schwartz GG, Olsson AG, Zeiher A, Oliver MF, Ganz P, Ezekowitz M, Chaitman BR, Leslie SJ, Stern T; MIRACL Study Investigators. Effects of atorvastatin on stroke in patients with unstable angina or non-Q-wave myocardial infarction: a Myocardial Ischemia Reduction with Aggressive Cholesterol Lowering (MIRACL) substudy. Circulation. 2002 Sep 24;106(13):1690-5
  10. Amarenco P, Bogousslavsky J, Callahan A 3rd, Goldstein LB, Hennerici M, Rudolph AE, Sillesen H, Simunovic L, Szarek M, Welch KM, Zivin JA; Stroke Prevention by Aggressive Reduction in Cholesterol Levels (SPARCL) Investigators. High-dose atorvastatin after stroke or transient ischemic attack. N Engl J Med. 2006 Aug 10;355(6):549-59
  11. Goldstein LB, Amarenco P, Szarek M, Callahan A 3rd, Hennerici M, Sillesen H, Zivin JA, Welch KM; SPARCL Investigators. Hemorrhagic stroke in the Stroke Prevention by Aggressive Reduction in Cholesterol Levels study. Neurology. 2008 ;70:2364-70
  12. Ridker PM, Pradhan A, MacFadyen JG, Libby P, Glynn RJ. Cardiovascular benefits and diabetes risks of statin therapy in primary prevention: an analysis from the JUPITER trial. Lancet. 2012 August 11; 380(9841): 565–571
  13. Callahan A, Amarenco P, Goldstein LB, Sillesen H, Messig M, Samsa GP, Altafullah I, Ledbetter LY, MacLeod MJ, Scott R, Hennerici M, Zivin JA, Welch KM; SPARCL Investigators. Risk of stroke and cardiovascular events after ischemic stroke or transient ischemic attack in patients with type 2 diabetes or metabolic syndrome: secondary analysis of the Stroke Prevention by Aggressive Reduction in Cholesterol Levels (SPARCL) trial. Arch Neurol. 2011 Oct;68(10):1245-51
  14. Amarenco P, Callahan A 3rd, Campese VM, Goldstein LB, Hennerici MG, Messig M, Sillesen H, Welch KM, Wilson DJ, Zivin JA. Effect of high-dose atorvastatin on renal function in subjects with stroke or transient ischemic attack in the SPARCL trial. Stroke. 2014 Oct;45(10):2974-82
  15. de Zeeuw D, Anzalone DA, Cain VA, Cressman MD, Heerspink HJ, Molitoris BA, Monyak JT, Parving HH, Remuzzi G, Sowers JR, Vidt DG. Renal effects of atorvastatin and rosuvastatin in patients with diabetes who have progressive renal disease (PLANET I): a randomised clinical trial. Lancet Diabetes Endocrinol 2015; 3: 181–90
  16. Amarenco P, Callahan A 3rd, Campese VM, Goldstein LB, Hennerici MG, Messig M, Sillesen H, Welch KM, Wilson DJ, Zivin JA. Effect of high-dose atorvastatin on renal function in subjects with stroke or transient ischemic attack in the SPARCL trial. Stroke. 2014 Oct;45(10):2974-82
  17. Sillesen H, Amarenco P, Hennerici MG, Callahan A, Goldstein LB, Zivin J, Messig M, Welch KM; Stroke Prevention by Aggressive Reduction in Cholesterol Levels Investigators. Atorvastatin reduces the risk of cardiovascular events in patients with carotid atherosclerosis: a secondary analysis of the Stroke Prevention by Aggressive Reduction in Cholesterol Levels (SPARCL) trial. Stroke. 2008 Dec;39(12):3297-302
  18. Amarenco P, Goldstein LB, Szarek M, Sillesen H, Rudolph AE, Callahan A 3rd, Hennerici M, Simunovic L, Zivin JA, Welch KM; SPARCL Investigators. Effects of intense low-density lipoprotein cholesterol reduction in patients with stroke or transient ischemic attack: the Stroke Prevention by Aggressive Reduction in Cholesterol Levels (SPARCL) trial. Stroke. 2007;38:3198-3204

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