Effect of Rare Earths on Composition and Activities of Rare Earth Elements Binding Glycoprotein in Tea

The effects of spraying rare earths(RE) on composition and activities of tea polysaccharide were measured by inductively coupled plasma mass spectrometry (ICP MS), gas chromatography(GC), amino acid analyzer and animal models. The results show that there are rare earth elements binding glycoprotein in tea (REE TGP). The effects of RE on composition and content of saccharides in REE TGP are not obvious. The contents of Hypro and Ser in REE TGP are evidently enhanced in comparison with that in control (not treated with rare earth), but the content of Glu is smaller than that from control. The content of La in REE TGP from the tea garden sprayed rare earth is 193% higher than that in control. REE TGP declines content of blood sugar in mice and enhances immunization of rat, which are very evident when the animals are treated by REE TGP from the tea garden sprayed RE.