ABSTRACT
<p><b>OBJECTIVE</b>To study the effect of GMCSF-absence on the rate of wound healing and neovascularization during wound repair.</p><p><b>METHODS</b>30 wild type (WT) mice and 30 GMCSF- absence mice (GMCSF-KO) were obtained. They were received full thickness skin wound (0.8 cm x 0.8 cm) in each side of midline after deeply anesthesia. In the different post-injury time points, the wound sites were digitally photographed to calculate the percentage of wound closure by using computer image analyses software. The wound specimens were also obtained dynamically for immunohistological analysis of CD31 at wound site.</p><p><b>RESULTS</b>The analysis of the wound closure showed that wound healing in GMCSF-KO mice was delayed significantly comparing with that in WT mice from the day 3 post-wounding. At days 7 and 10 after wounding significantly more numbers of blood vessels were formed in the WT controls compared to the GMCSF-KO mice.</p><p><b>CONCLUSIONS</b>GMCSF-absence inhibits neovascularization during wound repair and leads to the delay of wound healing.</p>
Subject(s)
Animals , Female , Mice , Disease Models, Animal , Granulocyte-Macrophage Colony-Stimulating Factor , Mice, Inbred C57BL , Mice, Knockout , Monocytes , Neovascularization, Physiologic , Skin , Wounds and Injuries , Wound HealingABSTRACT
<p><b>OBJECTIVE</b>To investigate gene mutations of the epidermal growth factor receptor (EGFR) and K-RAS in Chinese non-small cell lung cancers (NSCLCs).</p><p><b>METHODS</b>Mutations of exons 18, 19 and 21 of the EGFR and codons 12, 13 of the K-RAS in 101 NSCLCs were detected by PCR-amplifying and gene sequencing, and the relationship between mutations and clinical characters of NSCLCs and response to gefitinib were analyzed.</p><p><b>RESULTS</b>Overall, 26 EGFR mutations (25.7%), 3 K-RAS mutations (2.9%) were detected, and EGFR mutation frequencies in adenocarcinomas, nonsmoker and female were found to be high (44.2%, 65.7% and 48.3% respectively). Nine out of 10 gefitinib treated patients with disease control was found with EGFR mutation.</p><p><b>CONCLUSION</b>The data suggest that mutation frequency of EGFR in NSCLCs from Chinese patients is higher than that of western ethnicities, such mutations are well correlated with tumor response to gefitinib, and gefitinib is more fit for Chinese NSCLC patients.</p>