Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Macrophage and Anticancer Activities of Feed Additives on β-Glucan from Schizophyllum commune in Breast Cancer Cells

치마버섯균 유래의 베타글루칸에 대한 사료첨가제로서의 대식세포 기능 활성 및 유방암 세포주에서의 항암효능 효과

  • Received : 2011.03.29
  • Accepted : 2011.06.10
  • Published : 2011.07.31
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Abstract

[ ${\beta}$ ]Glucan is a polysaccharide expressed on the cell walls of fungi. It is known that ${\beta}$-glucan is recognized by a family of C-type lectin receptors, dectin-1, which is expressed mainly on myeloid immune cells, including macrophages, neutrophils and dendritic cells. Raw 264.7 cells were treated with ${\beta}$-glucan from Schizophyllum commune. ${\beta}$-Glucan was not cytotoxic up to 400 ${\mu}g$/mL as measured by MTT assay. To measure the activity of macrophages, NO and TNF-${\alpha}$ assays were performed in Raw 264.7 cells. Treatment with ${\beta}$-glucan for 24 hr significantly increased production of NO and TNF-${\alpha}$ compared with control groups (p<0.05), indicating activation of macrophages. To measure inhibition of breast cancer cell proliferation, MTT assay was performed in MDA-MB-231 cells. Cell viability was significantly decreased in the group treated with 400 ${\mu}g$/mL of ${\beta}$-glucan for 48 hr (p<0.05) compared to the control group. However, tumor volume was decreased in the groups administered 200 ${\mu}g$ of ${\beta}$-glucan/mouse compared to the control group. These results indicate that ${\beta}$-glucan inhibits breast cancer cell growth through the induction of apoptosis.

치마버섯에서 추출한 베타글루칸을 Raw 264.7 세포에 처치한 후 MTT assay로 측정한 결과 베타글루칸 400 ${\mu}g$/mL까지에 의한 세포독성은 없었다. 대식세포의 활성능을 측정하기 위해서 Raw 264.7 세포에서 NO와 TNF-${\alpha}$의 생성을 측정하였다. 베타글루칸을 대식세포에 24시간 처리한 결과 대조군과 비교 시 NO와 TNF-${\alpha}$가 유의적으로 상승하였다. 이 결과 베타글루칸이 대식세포인 Raw 264.7 세포를 활성화 시키는 것으로 사료된다. 따라서 본 실험에 사용된 베타글루칸은 면역강화용 사료첨가제로서의 의미가 충분하다고 사료된다. MDA-MB-231 유방암 세포의 성장을 저해하는지 확인하기 위하여 MTT assay를 시행하였다. 400 ${\mu}g$/mL 베타글루칸을 48시간 처리한 결과 대조군과 비교 시 유방암 세포의 성장이 유의적으로 억제하였다. 그리고 베타글루칸이 유방암 세포에서 성장 억제 효과를 알아보기 위해 누드마우스에 MDA-MB-231 유방암 세포를 접종하였다. 베타글루칸의 용량은 대조군(0 ${\mu}g$/mouse), 저용량(200 ${\mu}g$/mouse), 고용량(400 ${\mu}g$/mouse)으로 설정하여 누드마우스에 경구투여 하였다. 이 결과 저용량군(200 ${\mu}g$/mouse)이 고용량군(400 ${\mu}g$/mouse)보다 항암효능이 더 많이 일어나는 것을 확인하였다. MDA-MB-231 유방암 세포주에서 베타글루칸이 종양 성장이 감소하였지만, 그 결과가 유의적인 차이를 보이지 않아 본 연구에서 사용한 용량에서는 베타글루칸이 MDA-MB-231 유방암 세포주에서 종양 성장을 유의적으로 억제하지 않는 것으로 사료된다. 조직병리학적 검사에서 독성이 무해한 것으로 판단되어 면역강화용 사료첨가제로 사용하여도 무방할 것으로 사료된다.

Keywords

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