Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Comparison of mice gut microbiota before and after fasting for a day

절식이 마우스 장내미생물에 미치는 영향

  • Hong, Jiwan (Faculty of Biotechnology, College of Applied Life Sciences, SARI, Jeju National University) ;
  • Jo, Hyejun (Faculty of Biotechnology, College of Applied Life Sciences, SARI, Jeju National University) ;
  • Unno, Tatsuya (Faculty of Biotechnology, College of Applied Life Sciences, SARI, Jeju National University)
  • Received : 2019.08.08
  • Accepted : 2019.10.02
  • Published : 2019.12.31
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Abstract

In this study, we investigated the effects of fasting on gut microbiota of mice fed normal (CTL) or high-fat diets (HF). Mice were raised for 16 weeks and fasted for a day at the end of the experiment. Fecal samples were collected one day before and after fasting, which were analyzed using MiSeq. Our results showed that the species richness and evenness were decreased in fasted HF group, whereas no difference was observed for CTL groups. Moreover, HF fed mice gut microbiota showed different microbial communities after fasting, while CTL groups did not show microbiota shifts. Differential abundance analysis showed that fasting CTL group mice increased and decreased one operational taxonomic unit (OTU) in S24_7 and one OTU in Ruminococcaceae, respectively. On the other hand, fasting HF group mice decreased 10 OTUs and increased 3 OTUs most of which were classified to Ruminococcaceae. Our results suggest that fasting mice may affect the abundance of Ruminococcaceae species and effects of fasting seem to be more obvious for HF-fed mice compared to those of mice fed CTL-diet.

본 연구에서는 절식이 일반사료 및 고지방사료를 섭취한 마우스의 장내미생물생태에 미치는 영향에 관하여 조사하였다. 일반 사료 및 고지방사료를 마우스에 16주 동안 무한급이 형태로 섭취하게 하여 실험종료 직전에 1일(24시간) 간 절식시켰으며, 절식 전 후의 분변 샘플을 채집하고 MiSeq을 이용하여 장내미생물생태 분석을 진행하였다. 본 연구의 결과는 고지방사료를 섭취한 마우스에서는 절식 전후 장내미생물생태 내의 종 풍부성과 균등성이 감소한 반면, 일반사료를 섭취한 마우스에서는 차이를 나타내지 않았다. 또한, 고지방사료를 섭취한 마우스의 장내미생물생태에서는 절식 후 변화하는 것을 확인하였으며, 일반 사료를 섭취한 마우스의 절식 전후 변화가 없었다. Difference abundance analysis는 일반사료를 섭취한 마우스에서 절식 이후 S24-7로 분류되는 OTU는 증가하고, Ruminococcaceae로 분류되는 OTU가 감소하는 것으로 확인되었다. 반면, 고지방사료를 섭취한 마우스에서는 절식 이후 10OTUs가 감소하고, 3OTUs가 증가하였는데, 대부분 Ruminococcaceae로 분류되는 것으로 확인되었다. 본 연구 결과는 마우스에서의 절식이 장내미생물생태 중 Ruminococcaceae의 abundance에 영향을 미치며, 일반사료를 섭취한 마우스에 비해 고지방사료를 섭취한 마우스에서 절식에 대한 효과가 더 명확하게 나타난다는 것을 시사한다.

Keywords

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