RESUMEN
Objective To obserVe the effect of recombinant human granulocyte∕macroPhage colony stimulating factor ( rhGM_CSF) and nano_silVer as treatment for skin with deeP II degree burn. Methods DeeP II degree burn Wistar rat model was established. The rats were randomly diVided into three grouPs,Petrolatum treatment grouP (grouP A,n=30),nano_silVer treatment grouP (grouP B,n=30),and rhGM_CSF treatment grouP (grouP C,n=30). The Pathological changes of wound of the three grouPs were obserVed 1,4,7,10,14 and 21 days after the treatment. The concentration of VEGF in serums was measured with ELISA. The leVels of HIF_1α mRNA exPression were detected by RT_PCR. Results On day 10, neoVascularization deVeloPed in grouPs A, B and C. Healing rate of the wound was the highest in grouP C, lowest in grouP A, with significant differences among the three grouPs on day 14 and day 21 (P<0. 05). VEGF leVel Peaked on day 14 in grouP A,and on day 10 in grouPs B and C. There were significant differences in VEGF leVel on day 1 between grouP A and grouPs B,C,on day 7 between grouP A and grouP C,on day 10,14 and 21 among the three grouPs (P<0. 05),but no significant differences on day 4 among the three grouPs. Conclusion rhGM_CSF and nano_silVer treatment can accelerate neoVascularization of wound,and rhGM_CSF is better than nano_silVer.