• 1.The Second Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China;;
  • 2.Central Laboratory, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China;
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Objective To explore the effect of dendritic cells (DCs) allergized by K-ras mutant peptide on expressions of chemokines CCL19, CCL22, and cytoskeletal protein fascin-1.
Methods DCs were derived from peripheral blood in the presence of granuloceyte/macrophage-colony stimulating factor, interleukin (IL) -4 in vitro. The DCs were collected on day 7 after culture, and were divided into non-K-ras mutant peptide group (addition of RPMI 1604 culture solution 50 μg/ml) and K-ras mutant peptide group (addition of K-ras mutant peptide 50 μg/ml). Phenotype was identified by flow cytometry. The morphological structure was observed by scanning and transmission electron microscopies, respectively. The expressions of IL-12, CCL19, and CCL22 were tested continuously by enzyme-linked immunosorbent assay (ELISA). The expression of cytoskeletal protein fascin-1 was determined by Western blot.
Results ①The expressions of CD1a, CD80, and CD86 after loading K-ras mutant peptide were higher than that before loading K-ras mutant peptide (P lt;0.01). ②The DCs with petal-like and branch-like profections after loading were observed under scanning electron microscopy; The DCs with irregular shapes, branch-like or burr-like were showed under transmission electron microscopy. ③The expressions of IL-12, CCL19, and CCL22 in the Kras mutant peptide group were higher than those in the non-K-ras mutant peptide group at different times (6, 12, 24, and 48 h) after loading Kras mutant peptide (P lt;0.01). ④The expression of fascin-1 in the K-ras mutant peptide group was also higher than that in the non-K-ras mutant peptide group (P lt;0.01).
Conclusion K-ras mutant peptide can promote DC to mature and improve the expression of chemokines and cytoskeletal protein which will strengthen DC migration.

Citation: JIANG Liangxian ,TAN Guang,WANG Zhongyu,DOU Chunpeng,SHAN Lujuan. Effect of Dendritic Cells Allergized by K-ras Mutant Peptide on Expressions of CCL19, CCL22, and Fascin-1. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2010, 17(9): 917-921. doi: Copy