Objective To observe the effect of recombinant human granulocyte/macrophage colonystimulating factor (rhGM-CSF) combined with nano-silver for deep burn degreen Ⅱ. Methods The burn model were done with Wistar rats. They were randomly divided into four groups , group A (n = 30): petrolatum treatment, group B(n = 30): nano-silver treatment, group C(n = 30): rhGM-CSF treatment, and group D(n =30): rhGM-CSF combined with nano-silver treatment. The healing rates of the four groups were observed on postburn day 1, 4, 7, 10, 14, 21. Meanwhile the levels of VEGF and EGF in serums were measured with ELISA. Results All groups started to heal on postburn day 10. Group A had inflammation obviously , and group D moderately. There were significant difference in the healing retes on postburn day 10 , 14, 21 between four groups (P < 0.05). The level of VEGF in group A peaked on postburn day 21 (25.76 ± 1.46)pg/mL, but the levels of VEGF in group B, group C and group D peaked on postburn day 14[(29.73 ± 1.58)pg/mL, (38.91 ± 2.38)pg/mL, (43.54 ± 1.28)pg/mL]. On postburn day 4, 7, 10, 14, 21, there were significant difference(P <0.05). The level of EGF peaked on postburn day 21 in all groups [(0.72 ± 0.14)ng/mL, (0.93 ± 0.13)ng/mL, (1.18 ± 0.16)ng/mL, (1.50 ± 0.15)ng/mL]. There were significant difference on postburn day 7, 10, 14, 21 between four groups (P < 0.05). Conclusions rhGM-CSF combined with nano-silver treatment could promote wound healing, and be better than rhGM-CSF and nano-silver singly.

Objective To observe the effect of recombinant human granulocyte/macrophage colonystimulating factor (rhGM-CSF) combined with nano-silver as a treatment on deep burn degreen Ⅱ about inflammation .Methods The burn model was built with Wistar rats .They were randomly divided into four groups ,petrolatum treatment (group A ,n= 30) ,nano-silver treatment (group B ,n=30) ,rhGM-CSF treatment(group C ,n=30) ,and rhGM-CSF combined with nano-silver treatment(group D ,n=30) . observation the inflammatory reaction ,and culture bacteria on wound of the four groups at 1st ,4th ,7th ,10th ,14th ,21th day after treatment were made .The level of IL-2 and IL-8 were measured in serums with ELISA .Results The inflammatory reaction:group A>group B>group C>group D ;Bacterias were observed in group A ,group B/C and group D at 4th ,10th ,14th day respectively af-ter treatment .The number of bacterial growed in group D was less than in group A ,group B and group C .The numbers of bacterial growed in group B and group C were less than in group A .And after 10 ,14 ,21 days treatment ,there was significantly statistical difference(P<0 .05) .There was difference among groups in the levele of IL-2 and IL-8 ,which were the lowest in group D and the highest in group A .The level of IL-2 has no significantly statistical difference between every groupat 1st day and between B and C group at 4th day(P>0 .05) .After other days treatment ,there was significantly statistical difference(P<0 .05) .There was signifi-cantly statistical difference in every group at each day of the IL-8 levele except A and B group ,B and C group ,C and D group at 1st day (P<0 .05) .Conclusion rhGM-CSF combined with nano-silver treatment could alleviate inflammatory reaction ,and be better than rhGM-CSF or nano-silver alone .