Taxillus chinensis and Uncaria rhyncophylla are the herbs used in traditional Chinese anticancer formulations. During the past decade, research on plant polysaccharides has gained importance due to their therapeutic value and minimum side effects. In this study, hot water extraction method was employed to isolate polysaccharides from the stems of T. chinensis and stems with hooks of U. rhyncophylla. Size-exclusion chromatography was then used for further fractionation. Separated fractions from T. chinensis were designated as TCP-1, TCP-2 and TCP-3 and those from U. rhyncophylla were termed UC-1 and UC-2. Their sugar compositions were estimated using gas chromatography that revealed the presence fructose, glucose, xylose, arbinose, and rhamnose. Amino acid analysis of these fractions has indicated that they are protein-bound polysaccharides. The antioxidant activities were investigated using DPPH and yeast assays. The ability of these polysaccharide fractions to stimulate mouse macrophages was measured using Griess reagent and ELISA test. The results revealed that some of the isolated fractions (TCP-2, TCP-3, UC-1 and UC-2) displayed significant antioxidant activities and were also found to be effective immunomodulators in a concentration-dependent manner. Outcomes of this research strongly indicate that U. rhyncophylla and T. chinensis have therapeutic potential to be used for the treatment of cancer.

01 Feb 1983·Journal of VirologyQ2 · MEDICINE

UC-1, a new bacteriophage that uses the tonA polypeptide as its receptor

Q2 · MEDICINE

Article

Author: Lundrigan, Michael D. ; Lancaster, John H. ; Earhart, Charles F.

We characterized UC-1, a previously undescribed Escherichia coli phage. UC-1 was observed to have an icosahedral head and a long, flexible, noncontractile tail: its genome consisted of linear double-stranded DNA having a molecular weight of 34 X 10(6). The product of the tonA gene served as at least part of the receptor for UC-1. E. coli tonA strains neither plated nor adsorbed UC-1 well, tonA mutants were selected on the basis of UC-1 resistance, and ferrichrome, a siderophore which utilizes TonA as its receptor, blocked infection. Restriction analyses, DNA-DNA hybridization experiments, and guanine-plus-cytosine determinations demonstrated that UC-1 DNA was unrelated to that of other phages (T1, T5, and phi 80) which employ TonA as a receptor. Also, mutants specifically resistant to UC-1 were isolated. UC-1 may be useful as a probe for investigating TonA, which functions as a receptor for more ligands than any other membrane protein. Study of the resistant mutants may improve our understanding of how phage DNA penetrates the cell envelope.

01 Jul 1966·Journal of the American Oil Chemists' SocietyQ4 · AGRICULTURAL & FORESTRY SCIENCE

High oleic acid safflower oil: A new stable edible oil

Q4 · AGRICULTURAL & FORESTRY SCIENCE

Article

Author: Kohler, G. O. ; Applewhite, T. H. ; Fuller, G.

A safflower seed (UC-1) oil in which the oleic acid content is ∼80% of the total fatty acids is described.The UC-1 oil compared favorably to the hydrogenated com. frying oils.

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