Figure 2. Dietary AuNPs do not trigger stress responses in fly larvae.

In larvae fed with control food or 2 nM AuNPs, stress responses were measured by quantitative RT-PCR (A–C) or lysotracker staining (D). (A), (B) Dietary AuNPs did not affect expression of heat shock protein genes hsp83 (A) or hsp70 (B). ns, not significant. (C) Dietary AuNPs slightly reduced activation of JNK pathway downstream gene puckered. *, P<0.05. (D) Dietary AuNP slightly reduced autophagy in fat body.