title: The effect of alkaloid from Oxytropis ochrocephala on growth inhibition and expression of PCNA and p53 in mice bearing H22 Hepatocellular Carcinoma.
abstract: To study the antitumor activity of alkaloid extracted from Oxytropis ochrocephala and its possible mechanism, we observed the effect of alkaloid on tumor weight and expression of PCNA and p53 in mice bearing H(22) hepatocellular carcinoma by means of immunohistochemistry SP method. After treatment with alkaloid from Oxytropis ochrocephala, the results showed that alkaloid administration (25 and 50 mg/kg body weight, p.o.) could inhibit H(22) hepatocellular carcinoma growth to various extent, and the rates of inhibition were 48.5% and 57.7% respectively (p<0.01). The antitumor activity of the alkaloid is in a dose dependent manner, with no signs of toxicity to weight, kidney and liver. The sections of tumor showed the number of tumor cell decreased and nucleus appeared putrescence such as nucleus atrophy, disintegrating and dissolving. Meanwhile, the expression of PCNA and mutant p53 protein positive cell numbers in mice bearing H(22) hepatocellular carcinoma also suppressed by alkaloid (p<0.05). It suggested that Alkaloid from Oxytropis ochrocephala showed antitumor effect and its possible mechanism might be associated with the expression inhibition of PCNA and mutant p53 protein. Further studies are needed to explore the antitumor activity of the other compounds of Oxytropis ochrocephala and to specify their possible mechanism of action.
authors.affiliation: College of Animal Science, Northwest Agriculture and Forestry University, Shannxi Province, People's Republic of China.
authors.forename: Ling
authors.initials: L
authors.lastname: Long
authors.forename: Qingwang
authors.initials: Q
authors.lastname: Li
mesh_terms: D000470:Alkaloids / Q000302:isolation & purification / Q000494:pharmacology*; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification / Q000494:pharmacology*; D006528:Carcinoma, Hepatocellular / Q000235:genetics* / Q000473:pathology*; D049109:Cell Proliferation / Q000187:drug effects*; D003864:Depression, Chemical; D004305:Dose-Response Relationship, Drug; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects*; D008113:Liver Neoplasms / Q000235:genetics* / Q000473:pathology*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009154:Mutation; D009368:Neoplasm Transplantation; D033021:Oxytropis / Q000737:chemistry*; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics / Q000378:metabolism*
chemical_list: D000470:Alkaloids; D000972:Antineoplastic Agents, Phytogenic; D018809:Proliferating Cell Nuclear Antigen; D016159:Tumor Suppressor Protein p53