The researchers exposed mouse bone marrow cells to different concentrations of 1,4-BQ and found it induced cytotoxicity that leads to suicidal cell death, or apoptosis.

研究人员让小鼠中的这些骨髓细胞接触不同浓度的1，4-BQ，结果发现它诱导细胞毒性，从而导致自杀性细胞死亡，或者说细胞凋亡。

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But the sprinter's family denied BBC reports Monday that he's suicidal as he awaits trial in what prosecutors say was the premeditated death of Steenkamp.

CNN: Pistorius not suicidal, family says

His death inspired Congress to pass a law mandating better services for suicidal veterans.

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