Change of body temperature after MPTP administration. Open circle, MPTP, mice that breathed air, treated with MPTP (n = 3). Solid square, MPTP + H2S, mice treated with MPTP that breathed H2S (n = 5). Day 0 is the day when MPTP was administered to mice. Pre, body temperature of mice before breathing H2S or air in the experimental chamber; post, body temperature of mice immediately after breathing H2S or air in the chamber. *p < 0.05 vs. MPTP.