食品科学 ›› 2014, Vol. 35 ›› Issue (1): 250-253.doi: 10.7506/spkx1002-6630-201401049

• 营养卫生 • 上一篇    下一篇

硒化乳酸菌胞外多糖对小鼠腹腔巨噬细胞及肿瘤细胞内游离Ca2+的影响

刘 鹭,潘道东*,丁 琳,曾小群   

  1. 宁波大学海洋学院食品系,浙江 宁波 315211
  • 收稿日期:2013-03-27 修回日期:2013-12-25 出版日期:2014-01-15 发布日期:2014-01-22
  • 通讯作者: 潘道东 E-mail:daodongpan@163.com
  • 基金资助:

    浙江省自然科学基金重点项目(Z3110211);国家自然科学基金项目(41276121);宁波市重大攻关项目(2011C11017)

Effect of Selenium-Modified Exopolysaccharide from Lactococcus lactis subsp. lactis on [Ca2+]i in Mouse Macrophages and Cancer Cells

LIU Lu, PAN Dao-dong*, DING Lin, ZENG Xiao-qun   

  1. Department of Food Science and Engineering , College of Marine, Ningbo University, Ningbo 315211, China
  • Received:2013-03-27 Revised:2013-12-25 Online:2014-01-15 Published:2014-01-22
  • Contact: PAN Dao-Dong E-mail:daodongpan@163.com

摘要:

目的:研究硒化乳酸菌胞外多糖对小鼠腹腔巨噬细胞、SGC7901胃癌细胞及海拉细胞(Hela cells)内游离Ca2+的影响。方法:分离制备小鼠腹腔巨噬细胞,利用Ca2+荧光探针Fluo-3/AM及激光共聚显微镜测定加药后10 min细胞内Ca2+浓度的变化。结果:添加硒化多糖后,巨噬细胞内Ca2+浓度缓慢升高,而胃癌细胞与Hela细胞内Ca2+水平均有不同程度的下降。结论:通过对乳酸菌胞外多糖进行硒化修饰可增强其刺激巨噬细胞的能力,因而发挥其免疫功效。硒化多糖与肿瘤细胞表面受体结合后引起细胞内Ca2+内流的减少,提示硒化后的多糖可引起肿瘤细胞不同程
度的细胞凋亡。

关键词: 胞外多糖, 硒化, 巨噬细胞, 钙离子, 肿瘤细胞

Abstract:

Objective: The effect of Se-exopolysaccharide (EPS) from Lactococcus lactis subsp. lactis on intracellular free
Ca2+ levels in mouse macrophages cells, gastric cancer cells SGC7901 and Hela cells was studied. Methods: Cells labeled
with Fluo-3/AM dye for 10 min were examined using laser confocal scanning microscope. Results: The intracellular Ca2+
level in mouse macrophages increased in the presence of Se-EPS. On the other hand, Se-EPS could decrease the intracellular
Ca2+ levels both in gastric cancer cells SGC7901 and Hela cells. Conclusion: Se-EPS can activate macrophages, which may
be related to Ca2+ signal pathways. Se-rich EPS has gained the capacity to induceapoptosis in tumor cells.

Key words: exopolysaccharides, selenization, macrophage, Ca2+, cancer cells

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