Characterization and immunomodulatory function comparison of various bursal-derived peptides isolated from the humoral central immune organ

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• 作者：Xiu-Li Feng^a ; Qing-Tao Liu^b ; Rui-Bing Cao^a ; Bin Zhou^a ; Yuan-Peng Zhang^a ; Ke Liu^a ; Xiao-Dong Liu^a ; Jian-Chao Wei^c ; Xin-Feng Li^a ; Pu-Yan Chen^a ; ^{puyanchen@yahoo.com.cn}
• 关键词：BF ; the bursa of Fabricius ; BPP-III ; bursal pentapeptide III ; BPP-VI ; bursal pentapeptide VI ; BPP-V ; bursal pentapeptide V ; BHP ; bursal hexapeptide ; BTP ; bursal tripeptide ; BSP-I ; bursal septpeptide I ; BSP-II ; bursal septpeptide II ; BPP-I ; bursal pentapep
• 刊名：Peptides
• 出版年：2012
• 期刊代码：59_01969781
• 类别：neu
• 出版时间：February, 2012
• 卷：33
• 期：2
• 页码：258-264
• 文件大小：894 K

摘要

The bursa of Fabricius (BF) is the acknowledged central immune organ, which is important to the B cell differentiation and antibody production. However, due to difficult purification, the immunomodulatory peptides from BF were little reported. In this study, the extract samples of BF were taken to a chromatographic analysis by RP-HPLC. Five novel low molecular weight peptides were isolated from BF, with amino acid sequences of YEYAY, RMYEE, GPPAT, AGCCNG, and RRL, and named as Bursal pentapeptide (BPP)-III, -IV, -V, and Bursal hexapeptide (BHP), and Bursal tripeptide (BTP), respectively. BSP-I, BSP-II, BPP-I and BPP-II are recently reported to be the bursal-derived bioactive peptides. In this paper, we analyzed the chemical formula and characteristics of these nine bursal-derived peptides. The immunization comparative experiment verified the different immunomodulatory activity of these nine bursal peptides on antibody and cytokine productions. Furthermore, the results showed that at reachable concentrations, BPP-II and BPP-I induced antibody productions, lymphocyte viabilities and cytokine responses in different dose-dependent manner in the immunized mice model, respectively. These results provided important orientations for the comprehensively understanding and study of the humoral central immune system of human, and provided a novel insight on the treatment of serious disease and immune improvement of human.