Neuroprotective effect of suramin on the 6-OHDA-induced zebrafish PD model. (a) Zebrafish were pretreated with 10 μM suramin from 9 h after fertilization (hpf) to 3 days after fertilization (dpf) and then challenged with 250 µM 6-OHDA from 2 to 3 dpf. Quantitative PCR of PTP1B for the control and 6-OHDA groups was performed. (b) Zebrafish were pretreated with 10 μM suramin from 9 hpf to 3 dpf and then challenged with 250 µM 6-OHDA from 2 to 3 dpf. Quantitative PCR of BDNF for the control, 6-OHDA, 6-OHDA plus suramin, and suramin alone groups was performed. (c) Zebrafish were pretreated with 10 μM suramin from 9 hpf to 3 dpf and then challenged with 250 µM 6-OHDA from 2 to 3 dpf. Quantitative PCR of iNOS for the control, 6-OHDA, 6-OHDA plus suramin, and suramin alone groups was performed. (d) Zebrafish were pretreated with 10 μM suramin from 9 hpf to 5 dpf and then challenged with 250 µM 6-OHDA from 2 to 5 dpf. Western blotting of p-eIF2 and GRP-78 for the control, 6-OHDA, 6-OHDA plus suramin, and suramin alone groups was performed. (e) Quantitative results of p-eIF2 protein expression. (f) Quantitative result of GRP-78 protein expression. Data are presented as mean ± SEM, and each value contains three replicates and three samples. ∗Significantly different from the control; #significantly different from the 6-OHDA group.
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