硫化氢 (H 2 S) 是一种气体分子,因其在生物过程中的作用和在疾病(例如缺血性再灌注损伤)中的治疗潜力而受到关注。尽管具有临床相关性,但 H 2 S 向生物系统的输送因其高浓度的毒性而受到阻碍。在此,我们报告了第一个金属基 H 2 S 供体,可选择性地将这种气体输送到缺氧细胞。我们进一步表明,该化合物释放的 H 2 S 可以保护 H9c2 大鼠成肌细胞免受缺血性再灌注损伤的体外模型的影响。这些结果验证了氧化还原激活金属配合物作为缺氧选择性 H 2 S 释放剂的实用性,可用作研究这种气体分子在复杂生物系统中的作用的工具。
Reactive sulfur species have received considerable attention due to their various biological functions. Among these molecules, hydrogen polysulfides (H2Sn, n > 1) are recently suggested to be the actual signaling molecules derived from hydrogen sulfide (H2S). Hydrogen polysulfides may also have their own biosynthetic pathways. The research on H2Sn is rapidly growing. However, the detection of H2Sn is still challenging. In this work we report a H2Sn-mediated benzodithiolone formation under mild conditions. Based on this reaction, specific fluorescent probes for H2Sn are prepared and evaluated. The probe DSP-3 shows good selectivity and sensitivity for H2Sn.