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研究,可能对患者的个体化治疗更具意义。                                     and  calcium/calmodulin-dependent  protein  kinase  Ⅱ [J].
              心肌细胞兴奋-收缩耦联平衡和钙稳态是心肌收缩                              Br J Pharmacol,2015,172(17):4342-4354.
          的核心环节。研究发现,多靶点 TKIs 伊马替尼可激活                        [ 6 ]  LU Z J,WU C Y,JIANG Y P,et al. Suppression of pho-
            2+
          Ca /钙调蛋白依赖性蛋白激酶Ⅱ,使其磷酸化水平增                               sphoinositide 3-kinase signaling and alteration of multiple
          强,进而导致新生大鼠心肌细胞钙调控异常,引发病理                                ion  currents  in  drug-induced  long  QT  syndrome[J].  Sci
                                                                  Transl Med,2012,4(131):131ra50.
                    [15]
          性心肌肥厚 。另一种 TKIs 索拉非尼的急性毒性作用
                                                             [ 7 ]  LI  C  X,ZOU  R  Y,ZHANG  H,et  al.  Upregulation  of
          则可导致心肌细胞受磷蛋白磷酸化降低,从而减弱其对
                                                                  phosphoinositide 3-kinase prevents sunitinib-induced car‐
                      2+
          心肌肌质网Ca -ATP酶的亲和力,使肌质网钙瞬变幅度
                                                                  diotoxicity in vitro and in vivo[J]. Arch Toxicol,2019,93
          降低 50%、钙储备降低 33%,从而抑制心肌细胞收缩
                                                                 (6):1697-1712.
          力 。本研究发现,舒尼替尼可呈浓度依赖趋势地抑制
            [16]
                                                             [ 8 ]  LU  Z  J,JIANG  Y  P,WANG  W,et  al.  Loss  of  cardiac
          hiPSC-CMs 的收缩,同时可破坏钙调控的稳态,具体表                           phosphoinositide 3-kinase p110 alpha results in contractile
          现为显著的钙瞬变幅度下降和钙瞬变恢复时程延长。                                 dysfunction[J]. Circulation,2009,120(4):318-325.
          这与前期相关研究观察到的舒尼替尼急性毒性作用会                            [ 9 ]  GARG  P,GARG  V,SHRESTHA  R,et  al.  Human  in‐
          浓度依赖性地降低钙瞬变幅度,从而减弱心肌细胞收缩                                duced  pluripotent  stem  cell-derived  cardiomyocytes  as
                      [4]
          力的结果一致 。这说明舒尼替尼引发钙调控紊乱导致                                models  for  cardiac  channelopathies:a  primer  for  non-
          hiPSC-CMs 收缩抑制可能和钙通道内流和肌质网钙泵                            electrophysiologists[J]. Circ Res,2018,123(2):224-243.
          活性降低有关,与其他体内研究和体外细胞水平结果相                           [10]  DEICHER  A,SEEGER  T.  Human  induced  pluripotent
          一致  [4―6] 。前期相关研究发现,抑制 PI3K 活性是舒尼替                      stem cells as a disease model system for heart failure[J].
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          尼、达沙替尼和厄洛替尼引发心律失常的重要因素 。                                Curr Heart Fail Rep,2021,18(1):1-11.
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          本研究发现激活PI3K可显著改善舒尼替尼导致的心肌
                                                                  al. 2016 ESC Position Paper on cancer treatments and car‐
          收缩功能障碍,进一步提示,抑制PI3K活性是TKIs心脏
                                                                  diovascular  toxicity  developed  under  the  auspices  of  the
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          点、多靶点,本研究选择多靶点的舒尼替尼作为代表药
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          替尼致心肌毒性的潜在分子机制。                                         croRNAs in doxorubicin-induced cardiotoxicity:an over‐
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          中国药房  2023年第34卷第2期                                                 China Pharmacy  2023 Vol. 34  No. 2    · 143 ·
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