“…Intraplantar injections of the MRGPRC-specific peptides BAM8-22 or Tyr 6 -g 2 -MSH6-12 into juvenile or adult rats dose dependently resulted in acute nocifensive behavior, thermal hyperalgesia, and mechanical allodynia (Grazzini et al, 2004;Ndong et al, 2009). Likewise, intrathecal injection of MRGPRC agonists into juvenile or adult rats and Kunming mice also induced acute pain-like behavior and thermal hyperalgesia (Grazzini et al, 2004;Chang et al, 2009;Wei et al, 2010). MRGPRC may also be responsible for inflammatory pain, because complete Freund's adjuvant (CFA)-induced thermal hyperalgesia was alleviated by RNAi-mediated MRGPRC knockdown in rats (Ndong et al, 2009).…”