title: Optimization of processing technology of Rhizoma Pinelliae Praeparatum and its anti-tumor effect.
abstract: BACKGROUND
  Rhizoma Pinelliae is the dried tuber of Pinellia ternata (Thunb.) Breit. Modern pharmacological studies have shown that Rhizoma Pinelliae has antitussive, antiemetic, glandular secretion inhibiting and antitumor effects.
  
  
  OBJECTIVE
  To optimize the processing technology of Rhizoma Pinelliae Praeparatum, and to study its anti-tumor effect.
  
  
  METHODS
  Orthogonal design method was applied to analyze the effects of factors such as licorice concentration volume, soaking time and processing temperature on processing technology of Rhizoma Pinelliae Praeparatum; MTT assay and flow cytometry were used to determine the inhibitory effect of Rhizoma Pinelliae Praeparatum on Bel-7402 cells.
  
  
  RESULTS
  During the processing of Rhizoma Pinelliae Praeparatum, the size of influence of licorice concentration volume, soaking time and processing temperature on processing results of Rhizoma Pinelliae was: B>C>A in descending order, i.e. soaking time>processing temperature>licorice concentration volume, different concentrations of Rhizoma Pinelliae Praeparatum ethanol extracts could all exert inhibitory effect on the growth and proliferation of Bel-7402 cells, and with the increase of drug concentration and the extension of culture time, the cell proliferation inhibitory effect of Rhizoma Pinelliae Praeparatum ethanol extract became more and more evident. Apoptotic rate of 1.5 mg/ml Rhizoma Pinelliae Praeparatum ethanol extract group reached 13.53%, the difference was extremely significant compared with the control group. In conclusion the factor most influential to the processing technology of Rhizoma Pinelliae Praeparatum was soaking time, followed by processing temperature, the factor least influential was licorice concentration volume.
  
  
  CONCLUSIONS
  Rhizoma Pinelliae Praeparatum has inhibitory effect on growth and proliferation of Bel-7402 cells.
authors.affiliation: First affiliated hospital of Zhengzhou University Department of Medicine, Zhengzhou, Henan Province, China.
authors.forename: Xiuting
authors.initials: X
authors.lastname: Zhang
authors.affiliation: First affiliated hospital of Zhengzhou University Department of Medicine, Zhengzhou, Henan Province, China.
authors.forename: Yongjiang
authors.initials: Y
authors.lastname: Cai
authors.affiliation: First affiliated hospital of Zhengzhou University Department of Medicine, Zhengzhou, Henan Province, China.
authors.forename: Lijing
authors.initials: L
authors.lastname: Wang
authors.affiliation: First affiliated hospital of Zhengzhou University Department of Medicine, Zhengzhou, Henan Province, China.
authors.forename: Hongchun
authors.initials: H
authors.lastname: Liu
authors.affiliation: First affiliated hospital of Zhengzhou University Department of Medicine, Zhengzhou, Henan Province, China.
authors.forename: Xiulin
authors.initials: X
authors.lastname: Wang
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects*; D002478:Cells, Cultured; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity; D000431:Ethanol / Q000737:chemistry; D006358:Hot Temperature; D020128:Inhibitory Concentration 50; D030021:Pinellia / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D035281:Plant Tubers / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013678:Technology, Pharmaceutical / Q000379:methods*
chemical_list: D000970:Antineoplastic Agents; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; D012997:Solvents; D000431:Ethanol
keywords: Bel-7402 cells; Rhizoma Pinelliae Praeparatum; orthogonal experiment
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