The Journal of Internal Korean Medicine (대한한방내과학회지)

The Society of Internal Korean Medicine (대한한방내과학회)
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Anti-neoplastic and Anti-inflammatory Effects of Single and Mixed Extracts of Ulmus Davidiana and Oldenlandia Diffusa on Azoxymethane/dextran Sodium Sulfate-induced Colonic Neoplasms

AOM/DSS 유발 대장암에 대한 유근피(楡根皮)와 백화사설초(白花蛇舌草) 단일 및 배합 추출물의 항암 및 항염 효과

  • Lee, Seon-a (Dept. of Internal Medicine, College of Korean Medicine, Wonkwang University) ;
  • Baek, Dong-gi (Dept. of Internal Medicine, College of Korean Medicine, Wonkwang University) ;
  • Moon, Goo (Dept. of Internal Medicine, College of Korean Medicine, Wonkwang University)
  • 이선아 (원광대학교 한의과대학 내과학교실) ;
  • 백동기 (원광대학교 한의과대학 내과학교실) ;
  • 문구 (원광대학교 한의과대학 내과학교실)
  • Received : 2017.08.31
  • Accepted : 2017.12.27
  • Published : 2017.12.30
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Abstract

Objectives: The aim of this experimental study was to evaluate the anti-neoplastic and anti-inflammatory effects of single and mixed extracts of Ulmus davidiana (UD) and Oldenlandia diffusa (OD) on azoxymethane/dextran sodium sulfate (AOM/DSS)-induced colonic neoplasms in mice. Methods: AOM/DSS induces colitis-associated colonic neoplasms in mice. Mice were divided into seven groups: normal-no inducement and no treatment; control-colonic neoplasms with no treatment; UD-colonic neoplasms and treatment with UD; OD-colonic neoplasms and treatment with OD; UD1+OD1-colonic neoplasms and treatment with UD1 and OD1. UD1+OD2-colonic neoplasms and treatment with UD1 and OD2; UD2+OD1-colonic neoplasms and treatment with UD2 and OD1. Single and mixed preparations of UD and OD were applied to mice for six weeks. The colon length and weight and histopathologic changes of colon tissue were observed. Serum pro-inflammatory cytokines, including tumor necrosis factor-alpha ($TNF-{\alpha}$) and interleukin-6 (IL-6), were determined by enzyme-linked immunosorbent assay. The mRNA expression levels of Bax, Bcl-2, and interferon-gamma ($INF-{\gamma}$) were measured by RT-PCR. Results: The colon length was significantly increased in OD, UD1+OD2, and UD2+OD1 mice, and the colon weight was significantly decreased in OD and UD1+OD2 mice. The morphological change of colon epithelial cells was more suppressed in complex-treatment groups than in single-treatment groups. The inhibitory effect on inflammatory cell invasion was especially shown in UD1+OD2 mice. The serum level of the pro-inflammatory $TNF-{\alpha}$ was decreased in all complex-treatment groups, and the IL-6 level was decreased in UD1+OD1 mice. Single-treatment groups had an increase in the mRNA expression of the pro-apoptosis regulator Bax, and UD2+OD1 decreased the mRNA expression of the anti-apoptosis regulator Bcl-2. The mRNA expression of $INF-{\gamma}$ associated with inflammation was decreased in OD and UD1+OD2 mice. Conclusions: This study suggests that single and mixed extracts of Ulmus davidiana and Oldenlandia diffusa have anti-neoplastic and anti-inflammatory effects on AOM/DSS-induced colonic neoplasms in mice. Therefore, we conclude that UD, OD, and a mixture of UD and OD are potential therapeutic agents for colitis-associated colonic neoplasms.

Keywords

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