As shown in Figure 3, the percentage of cerebral infarction volume of rats in the cerebral hemisphere in the MCAO+Netrin-1 group was 28.76 ± 2.15%; in the MCAO group, the percentage of rat cerebral infarction volume in the cerebral hemisphere was 45.11 ± 5.85%, and the percentage of cerebral infarction volume in the NS group was 0. The gene discussed is NTN1; the disease is cerebral infarction.