SLFN5 and cancer: On the one hand, SLFN5 is not universal, and has different mechanisms of action for different types/subtypes of cancers and different effects on cancers, and part of the mechanism of SLFN5 has not yet been clarified and is in the early stage of research; on the other hand, there is no clear research that can show whether SLFN5 is easy to mutate and whether it is stable when put into the production of drugs.