KR20180073641A - 적응 방법 - Google Patents
적응 방법 Download PDFInfo
- Publication number
- KR20180073641A KR20180073641A KR1020187014503A KR20187014503A KR20180073641A KR 20180073641 A KR20180073641 A KR 20180073641A KR 1020187014503 A KR1020187014503 A KR 1020187014503A KR 20187014503 A KR20187014503 A KR 20187014503A KR 20180073641 A KR20180073641 A KR 20180073641A
- Authority
- KR
- South Korea
- Prior art keywords
- oxygen
- concentration
- antioxidant
- oxidized
- microorganism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
도면 1은 인간 소화관 내강의 산화환원 풀을 보여준다. 식품의 섭취를 통한 산소의 연속적 유입 및 소화관 점막층으로부터 확산이 있다는 사실에도 불구하고, 소화관의 순 산화환원 전위는 음성, ca -300mV 상태로 남아있다.
도면 2는 산화 스트레스에 의해 유발된 산소 민감한 효소에 대한 잠재적 피해 및 회복 기전을 보여준다.
도면 3은 인간 소화관 내에 소화관 미생물 균총에 의해 이용되는 주요 발효 경로를 보여준다.
도면 4a
맞춤 제작된 3개의 챔버가 있는 모의된 인간 장관 산화환원 모형 (SHIRM).
도면 4b
SHIRM에서 전자 수용체를 향하여 세균 세포로부터 전자 흐름의 계통도 표현. (Eo') 볼트에서 계측된 산화환원 전위 (환원 전위 및 산화 전위).
도면 4c
세균 세포로부터, 산화환원 전위를 포함하는 전자 수용체로의 전자 전달에 관련된 중간체의 SHIRM 계통도 표현.
도면 5.
SHIRM 작업의 기본 작업 흐름.
도면 6.
작은 베드 용적 ca 100ml 산소 주입기에 연계된 SHIRM 애노드 챔버의 표현.
도면 7.
공기 호흡 SHIRM: 측면 팔을 통해, 공기로부터 애노드 챔버 내로 직접적인 산소 확산.
도면 8.
SHIRM 작업의 작업 흐름, 10 단계
도면 9.
적응된 균주의 선별
도면 10.
적응된 균주의 산소 내성 프로필을 탐구하기 위한 전략.
| 시스테인 | 시스틴 | Eh | |
| mM | (mV) | ||
| 7,2 | 0,4 | -223 | 산소 포화된 배지 |
| 7,995 | 0,005 | -283 | |
| 7 | 1 | -211 | |
| 6 | 2 | -198 | |
| 5 | 3 | -188 | |
| 4 | 4 | -178 | 질소 일소에 의해 제조된 산소 고갈된 성장 배지 |
| 3 | 5 | -168 | |
| 2 | 6 | -155 | |
| 1 | 7 | -135 | |
| 0,01 | 8 | -13 | |
| 균주 코드 | 전체 명칭 | 단리 조건 | |
| 1 | TCS1 | Translucent colonies smooth | 3,5/v0,6 (1:100)의 6차 주기 |
| 2 | LTCS | Large translucent colonies smooth | 3,5/v0,6 (1:1000)의 10차 주기 |
| 3 | STCS | Small translucent colonies smooth | 3,5/v0,6 (1:1000)의 10차 주기 |
| 4 | OCS-1 | Opaque colonies smooth | 3,5/v0,6 (1:10)의 10차 주기 |
| 5 | OCS-2 | Opaque colonies smooth | 3,5/v0,6 (1:10)의 10차 주기 |
| g/L | ||
| 카시톤 | 10 | |
| 효모 추출물 | 2,5 | |
| NaCl | 0,9 | |
| K2HPO4 | 0,45 | |
| KH2PO4 | 0,45 | |
| NaHCO3 | 4 | |
| CaCl2.2H2O | 0,12 | 함께 고압멸균 |
| MgSO4.7H2O | 0,09 | |
| 글루코오스 | 4,5 | |
| 아세트산나트륨 | 2,7 | |
| 시스테인 | 1 | |
| 황산암모늄 | 1,32 | |
| 레자주린 | 0,001 | |
| 헤민 | 0,01 | |
| 비타민 | ||
| μg/L | 고압멸균 후 추가 | |
| 비오틴 (B7) | 10 | 필터 살균 |
| 코발라민 (B12) | 10 | |
| PABA | 30 | |
| 엽산 | 50 | |
| 피리독사민 | 150 | |
| 리보플라빈 (B2) | 50 | |
| 티아민 (B1) | 50 | |
| SCFA | ||
| mM | 고압멸균 후 추가 | |
| 프로피온산염 | 9 | 필터 살균 |
| 이소부티레이트 | 1 | |
| 이소발레르산염 | 2 | |
| 발레르산염 | 3 | |
| 최종 pH를 대략 7,2로 조정한다 | ||
Claims (19)
- 혐기성 미생물의 적응 및 산소에 더욱 내성인 혐기성 미생물의 선별을 위한 방법에 있어서, 상기 방법은 적용 전압 및 산소 확산을 통한 산화 스트레스의 단계별 이중 유도, 그리고 산화환원 상태를 조정하기 위한 항산화제/산화된 대응물 농도 비율의 단계별 변화와 함께 상기 미생물을 배양하는 단계를 포함하는 것을 특징으로 하는 방법.
- 청구항 1에 있어서, 항산화제/산화된 대응물은 시스테인/시스틴, 글루타티온/글루타티온-산화된 상태, 아스코르빈산/디히드로아스코르브산염, 디티오트레이톨/산화된 디티오트레이톨, 그리고 갈산/산화된 갈산으로 구성된 군에서 선택되는 것을 특징으로 하는 방법.
- 청구항 1 또는 청구항 2에 있어서, 상기 방법은 산화된 대응물의 농도에서 단계별 증가, 적용 전압에서 단계별 증가 및 산소 플럭스에서 단계별 증가와 합동된 항산화제의 농도에서 단계별 감소를 포함하는 것을 특징으로 하는 방법.
- 청구항 1 내지 3 중에서 어느 한 항에 있어서, 상기 방법에 대한 시작 조건은 낮은 또는 제로 산소 플럭스, 낮은 적용 전압, 높은 농도의 항산화제 및 낮은 농도 또는 제로 농도의 산화된 대응물, 그리고 산소가 제거된 배양 배지 중에서 하나 또는 그 이상, 또는 모두에서 선택되는 것을 특징으로 하는 방법.
- 청구항 4에 있어서, 시작 조건은 8mM 시스테인, 0mM 시스틴, 0.1V의 적용 전압, 그리고 제로 또는 낮은 산소 플럭스 중에서 하나 또는 그 이상, 또는 모두에서 선택되는 것을 특징으로 하는 방법.
- 청구항 5에 있어서, 단계별 변화는 3mM의 최소 시스테인 농도, 5mM의 최대 시스틴 농도, 0.6 V의 최대 적용 전압, 그리고 높은 산소 플럭스 중에서 하나 또는 그 이상, 또는 모두일 때까지 지속되는 것을 특징으로 하는 방법.
- 청구항 1 내지 5 중에서 어느 한 항에 있어서, 적용 전압은 0.6 V를 초과하지 않고, 및/또는 시스테인 농도는 3mM보다 낮지 않고, 및/또는 시스틴 농도는 5mM보다 높지 않고, 및/또는 배양 배지에서 용존 산소 농도는 준치사 농도에서 유지되는 것을 특징으로 하는 방법.
- 청구항 1 내지 7 중에서 어느 한 항에 있어서, 일단 단계별 변화가 완결되면, 상기 방법은 단계별 변화 후 도달된 적용 전압, 산소 확산 및 항산화제/산화된 대응물 농도 비율의 최종 조건 하에 상기 미생물을 배양하는 하나 또는 그 이상의 추가 단계를 포함하는 것을 특징으로 하는 방법.
- 청구항 8에 있어서, 추가 단계별 변화가 실행되는 단계를 더욱 포함하는 것을 특징으로 하는 방법.
- 청구항 1 내지 9 중에서 어느 한 항에 있어서, 상기 방법 또는 추가 단계는 새로운 배양 배지 내로 혐기성 미생물의 재접종을 수반하는 것을 특징으로 하는 방법.
- 청구항 10에 있어서, 상기 재접종은 배양 조건에서 상기 단계별 변화를 수반하는 것을 특징으로 하는 방법.
- 청구항 1 내지 11 중에서 어느 한 항에 있어서, 미생물은 페칼리박테리움 프라우스니치이 (Faecalibacterium prausnitzii)인 것을 특징으로 하는 방법.
- 청구항 1 내지 12 중에서 어느 한 항에 있어서, 상기 방법은 추가 단계를 수반하고, 여기서 유지된 물질대사 특징을 갖는 최고 적응된 균주를 선별하기 위해, 적응된 균주가 산소 내성, 부티르산염 생산 및 성장 동역학의 사정에 대해 선별검사되는 것을 특징으로 하는 방법.
- 혐기성 미생물의 증강된 생산을 위한 방법에 있어서, 이들 미생물은 일정한 산화 전위/적용 전압, 산소 확산 및 항산화제/산화된 대응물 농도 비율의 조합과 함께 배양되고, 따라서 도태 압력을 실시가능하게 하고 일정한 미생물 균주의 높은 수율을 유발하는 것을 특징으로 하는 방법.
- 청구항 14에 있어서, 상기 배양 조건은 3mM 시스테인, 5mM 시스틴, 0.6 V의 적용 전압 및 0.2nmolesml-1min-1의 산소 플럭스를 포함하는 것을 특징으로 하는 방법.
- 청구항 14 또는 청구항 15에 있어서, 상기 미생물은 페칼리박테리움 프라우스니치이 (Faecalibacterium prausnitzii)인 것을 특징으로 하는 방법.
- 청구항 1 내지 13 중에서 어느 한 항의 방법에 의해 획득된 미생물 균주.
- 청구항 17에 있어서, 상기 미생물은 DSM 32380, DSM 32378 및 DSM 32379로 구성된 군에서 선택되는 페칼리박테리움 프라우스니치이 (Faecalibacterium prausnitzii) 균주인 것을 특징으로 하는 미생물 균주.
- DSM 32380, DSM 32378 및 DSM 32379으로 구성된 군에서 선택되는 페칼리박테리움 프라우스니치이 (Faecalibacterium prausnitzii) 균주.
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