Hematopoietic and myeloprotective activities of an acidic Angelica sinensis polysaccharide on human CD34⁺ stem cells

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• 作者：Ji-Gua Lee^a ; Wen-Ting Hsieh^a ; Shee-Uan Chen^b ; Been-Huang Chiang^a ; ^{bhchiang@ntu.edu.tw}
• 关键词：Angelica sinensis polysaccharides ; Hematopoiesis ; Myeloprotection ; Human umbilical cord blood ; CD34+ stem cells
• 刊名：Journal of Ethnopharmacology
• 出版年：2012
• 出版时间：15 February 2012
• 年：2012
• 卷：139
• 期：3
• 页码：739-745
• 全文大小：412 K

文摘

Ethnopharmacological relevance

Angelica sinensis (AS) is a Chinese herbal medicine traditionally used in prescriptions for replenishing blood and treating abnormal menstruation and other women's diseases.

Aim of the study

This study aimed to separate and identify the major hematopoietic fraction from Angelica sinensis polysaccharides (ASPS), and to investigate the myeloprotective activity of the major bioactive fraction of ASPS as a possible supporting agent for cancer treatments.

Materials and methods

The ASPS was fractionated with DEAE-Sepharose CL-6B column to obtain four fractions (F1, F2, F3 and F4). Each fraction was cultured with human peripheral blood mononuclear cells (MNCs) to collect conditioned medium (CM). The hematopoietic ability of various MNC-CM was then evaluated by the colony-forming assay on CD34⁺ cells collected by the MACS method from human umbilical cord blood (UCB). In myeloprotective experiment, Adriblastina was used to act as the myelosuppressive agent. The monosaccharide composition of ASPS was analyzed by high-performance anion-exchange chromatography-pulse amperometric detector.

Results

The F2 fraction, which was found to have the highest hematopoietic activity, stimulated the human peripheral blood MNCs to secret GM-CSF and IL-3. F2 could also protect the hematopoietic function of CD34⁺ cells from Adriblastina. F2 occupies 19 % of ASPS and contains 0.53 % protein. The monosaccharide composition of F2 was arabinose (51.82 % ), fructose (1.65 % ), galactose (29.96 % ), glucose (4.78 % ) and galacturonic acid (14.80 % ), with molecular weight 2.5-295 kDa.

Conclusions

The bioactive fraction identified and fractionated from ASPS may be used as a health-promoting agent for anemia patients and cancer patients under chemoradiation treatment.