Turillazzi Emanuela, D'Errico Stefano, Neri Margherita, Riezzo Irene, Fineschi Vittorio
Department of Forensic Pathology, University of Foggia, Ospedali Riuniti, Foggia, Italy.
Toxicol Pathol. 2007 Oct;35(6):840-5. doi: 10.1080/01926230701584148.
Volatile anesthetics can elevate cytosolic free Ca(2 +) by releasing calcium from internal calcium stores and uptaking calcium from extracellular medium. Sevoflurane is an inhaled anesthetic used worldwide. A clear understanding of the exact mechanism of hepatic injury induced by sevoflurane remains elusive. A 69-year-old man with preexisting mild renal dysfunction, having undergone sevoflurane general anesthesia twice in 2 days, developed moderate jaundice. Liver enzymes strongly increased and remained elevated until death, which occurred on the 6th day after the first surgical intervention. The microscopic liver examination revealed an extensive and confluent hepatic necrosis, characterised by a large amount of calcium deposition in hepatic cell cytoplasm. These data were confirmed by confocal laser scanning microscopy and a 3-D visualization of calcium depositions was evident in hepatocytes cytoplasm. Our findings are suggestive with the previous experimental reports that consider elevation of cytoplasmic calcium may be the basis of sevoflurane - induced hepatotoxicity.
挥发性麻醉剂可通过从细胞内钙库释放钙以及从细胞外介质摄取钙来升高胞质游离钙(Ca²⁺)。七氟醚是一种在全球范围内使用的吸入性麻醉剂。对七氟醚所致肝损伤的确切机制仍缺乏清晰的认识。一名69岁男性,既往有轻度肾功能不全,在2天内接受了两次七氟醚全身麻醉,术后出现中度黄疸。肝酶显著升高并持续升高直至死亡,死亡发生在首次手术干预后的第6天。肝脏显微镜检查显示广泛融合的肝坏死,其特征是肝细胞质内大量钙沉积。这些数据通过共聚焦激光扫描显微镜得到证实,并且在肝细胞质中明显可见钙沉积的三维可视化。我们的发现与先前的实验报告一致,这些报告认为胞质钙升高可能是七氟醚诱导肝毒性的基础。