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影响 MTHFR C677T 与严重血液毒性(包括白细胞减少                     [ 8 ]  CHIUSOLO P,GIAMMARCO S,BELLESI S,et al. The
        及粒细胞减少)的相关性;年龄及种族因素可能均会影                                role of MTHFR and RFC1 polymorphisms on toxicity and
        响 MTHFR A1298C 与粒细胞减少的相关性。敏感性分                          outcome of adult patients with hematological malignan-
        析结果表明,大部分研究结果稳健性较好,信度尚可。                                cies treated with high-dose methotrexate followed by leu-
                                                                covorin rescue[J]. Cancer Chemother Pharmacol,2012,
            对比既往已发表的系统评价             [39-40] ,大多在单一遗传
                                                                69(3):691-696.
        模型下进行定量分析,或纳入研究未限制 MTX 的给药
                                                           [ 9 ]  KANTAR M,KOSOVA B,CETINGUL N,et al. Methy-
        剂量及患者病种类型,或未依据血液系统不良事件的严
                                                                lenetetrahydrofolate reductase C677T and A1298C gene
        重程度进行亚组分析以及未充分评估原始研究质量。
                                                                polymorphisms and therapy-related toxicity in children
        本研究考虑到 HDMTX 用于不同病种(如骨肉瘤)在给
                                                                treated for acute lymphoblastic leukemia and non-hodgkin
        药剂量与输注时间等用药方案方面存在差异,故仅关注                                lymphoma[J]. Leuk Lymphoma,2009,50(6):912-917.
        HDMTX 在血液恶性肿瘤患者中的应用,并结合 3 种遗                       [10]  翁鸿,江梅,仇成凤,等.遗传关联性研究 Meta 分析中的
        传模型合并效应量,因此更全面集中地评价了 MTHFR                              Hardy-Weinberg 平衡[J].中国循证心血管医学杂志,
        C677T及A1298C两个位点的多态性对HDMTX血液系                           2016,8(11):1281-1283.
        统不良事件发生风险的影响;其次,纳入的原始研究总                           [11]  STANG A. Critical evaluation of the Newcastle-Ottawa
        体质量较高,均满足 HWE,因此具有较好的群体代表                               scale for the assessment of the quality of nonrandomized
        性。但本研究尚存在一定局限性,如部分合并结果受纳                                studies in meta-analyses[J]. Eur J Epidem,2010,25(9):
        入原始研究数目限制(小于10项),发表偏倚不能完全除                              603-605.
                                                           [12]  SEDGWICK P. Meta-analyses:what is heterogeneity? [J].
        外;此外,部分研究未提及不良事件分级标准,且不同研
                                                                BMJ,2015.DOI:10.1136/bmj.h1435.
        究间HDMTX具体输注方案存在差异,故临床异质性无
                                                           [13]  SEDGWICK P,MARSTON L. How to read a funnel plot
        法完全除外。因此,本文所得结论仍需更高质量、更大
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        样本量的原始研究进一步验证。
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        中国药房    2020年第31卷第7期                                               China Pharmacy 2020 Vol. 31 No. 7  ·857  ·
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