JP7132661B2 - スフィンゴモナス属細菌由来のナノ小胞及びその用途 - Google Patents
スフィンゴモナス属細菌由来のナノ小胞及びその用途 Download PDFInfo
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Description
(a)健常者及び被検者のサンプルから分離した小胞からDNAを抽出する段階と、
(b)前記抽出したDNAに対して16S rDNAに存在する遺伝子の配列に基づいて作製したプライマーペアを用いてPCRを行った後、それぞれのPCR産物を得る段階と、
(c)前記PCR産物の定量分析を通じて健常者に比べてスフィンゴモナス属細菌由来の小胞の含量が低い場合、肝硬変、肝がん、心筋梗塞、腎不全、糖尿病、脳腫瘍、軽度認知障害、認知症、うつ病、自閉症、及びアトピー性皮膚炎からなる群から選ばれた一つ以上の疾患であると判定する段階。
(a)健常者及び被検者のサンプルから分離した小胞からDNAを抽出する段階と、
(b)前記抽出したDNAに対して16S rDNAに存在する遺伝子の配列に基づいて作製したプライマーペアを用いてPCRを行った後、それぞれのPCR産物を得る段階と、
(c)前記PCR産物の定量分析を通じて健常者に比べてスフィンゴモナス属細菌由来の小胞の含量が低い場合、肝硬変、肝がん、心筋梗塞、腎不全、糖尿病、脳腫瘍、軽度認知障害、認知症、うつ病、自閉症、及びアトピー性皮膚炎からなる群から選ばれた一つ以上の疾患であると判定する段階。
(a)健常者及び被検者のサンプルから分離した小胞からDNAを抽出する段階と、
(b)前記抽出したDNAに対して16S rDNA塩基配列に基づいて作製したプライマーペアを用いてPCRを行った後、それぞれのPCR産物を得る段階と、
(c)前記PCR産物の定量分析を通じてスフィンゴモナス属細菌由来の小胞の含量が低い場合、肝硬変、肝がん、心筋梗塞、腎不全、糖尿病、脳腫瘍、軽度認知障害、認知症、うつ病、自閉症、及びアトピー性皮膚炎からなる群から選ばれた一つ以上の疾患であると判定する段階。
細菌と細菌由来の小胞が胃腸管を通じて全身的に吸収されるかを評価するため、下記のような方法で実験を行った。まず、マウスの胃腸に蛍光で標識した前記細菌と、前記細菌由来の小胞をそれぞれ50μgの容量で口腔投与し、0分、5分、3時間、6時間、12時間後に蛍光を測定した。マウス全体のイメージを観察した結果、図1aに示すように、細菌の場合には、全身的に吸収されなかったが、細菌由来の小胞の場合には、投与後5分で全身的に吸収され、投与3時間後には、膀胱で蛍光が濃く観察され、小胞が泌尿器系に排泄されることが分かり、また、小胞は、投与12時間まで体内に存在することが分かった(図1a参照)。
細菌と細菌由来の小胞が粘膜防御膜を通過して組織に浸潤されるかを評価するため、細菌と細菌由来の小胞を腸に直接投与した後、免疫組織化学(Immunohistochemistry)方法により粘膜防御膜を通過して腸組織への浸潤を評価した。粘膜組織において細菌と小胞の存在を評価するため、細菌と小胞に対する抗体を作製してGFP(Green fluorescent protein)を付けて使用し、DAPI(4、6-diamidino 2-phenylindole)染色を行った後、顕微鏡で観察した。
血液または尿を先に10mlのチューブに入れ、遠心分離機(3,500xg、10min、4℃)で浮遊物を沈めた後、上澄み液だけを新しい10mlのチューブに移した。0.22μmのフィルターを使用して細菌及び異物を除去した後、セントリプレップチューブ(centrifugal filters 50kD)に移して1500xg、4℃で15分間遠心分離して50kDより小さな物質は捨て、10mlまで濃縮させた。再び0.22μmのフィルターを使用してバクテリア及び異物を除去した後、Type 90tiローターで150,000xg、4℃で3時間の間超高速遠心分離を行い、上澄み液を除去した後、塊状のペレットを生理食塩水(Phosphate buffered saline、PBS)で溶かした。
前記実施例3の方法で肝硬変患者97人、肝がん患者76人、さらに年齢と性別をマッチングした健常者171人の血液を対象に、血液中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液に比べて肝硬変及び肝がん患者の血液でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図3参照)。
前記実施例3の方法で心筋梗塞患者69人と、年齢と性別をマッチングした健常者159人の血液を対象に、血液中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液に比べて心筋梗塞患者の血液でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図4参照)。
前記実施例3の方法で腎不全患者36人と、年齢と性別をマッチングした健常者72人の血液を対象に、血液中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液に比べて腎不全患者の血液でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図5参照)。
前記実施例3の方法で糖尿病患者81人と、年齢と性別をマッチングした健常者126人の血液を対象に、血液中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液に比べて糖尿病患者の血液でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図6を参照)。
前記実施例3の方法で脳患者80人と、年齢と性別をマッチングした健常者121人の血液を対象に、血液中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液に比べて脳腫瘍患者の血液でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図7参照)。
前記実施例3の方法で軽度認知障害患者76人、アルツハイマー認知症患者70人、及び年齢と性別をマッチングした健常者146人の血液を対象に、血液中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液に比べて軽度認知障害及びアルツハイマー認知症患者の血液でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図8参照)。
前記実施例3の方法でうつ病患者70人と、年齢と性別をマッチングした健常者140人の血液を対象に、血液中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液に比べて、うつ病患者の血液でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図9参照)。
前記実施例3の方法で自閉症患者30人と、年齢と性別をマッチングした健常者40人の尿を対象に、尿中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の尿に比べて自閉症患者の尿中でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図10を参照)。
前記実施例3の方法でアトピー性皮膚炎患者61人と、年齢と性別をマッチングした健常者52人の血液及び尿を対象に、血液及び尿中に存在する小胞から遺伝子を抽出してメタゲノム解析を行った後、スフィンゴモナス属細菌由来の小胞の分布を評価した。その結果、健常者の血液及び尿に比べてアトピー性皮膚炎患者の血液及び尿でスフィンゴモナス属細菌由来の小胞が有意に減少していることを確認した(図11を参照)。
スフィンゴモナス・パウシモビリス及びスフィンゴモナス・コーリエンシス菌株を培養した後、その小胞を分離して特性を分析した。前記菌株を37℃培養器で吸光度(OD 600)が1.0~1.5になるまで、MRS(de Man-Rogosa and Sharpe)培地で培養した後、LB(Luria-Bertani)培地にサブカルチャーした。以後、菌株が含まれている培養液を回収して10,000xg、4℃で20分間遠心分離して菌体を除去し、0.22μmのフィルターでろ過した。ろ過した上澄み液を100 kDa Pellicon 2 Cassetteフィルターメンブレン(Merck Millipore、US)でMasterFlexポンプシステム(Cole-Parmer、US)を用いて微細ろ過(microfiltration)によって50ml以下の体積で濃縮した。濃縮させた上澄み液を再び0.22μmのフィルターでろ過した後、BCA(Bicinchoninic acid)アッセイを用いてタンパク質を定量し、得られた小胞に対して下記実験を行った。
炎症細胞においてスフィンゴモナス・パウシモビリス由来の小胞(Sphingomonas paucimobilis EV、SPC101)の炎症メディエーター(IL-6、TNF-α)の分泌に対する影響を調べるため、マウスマクロファージ細胞株であるRaw 264.7細胞にスフィンゴモナス・パウシモビリス由来の小胞を様々な濃度(0.1、1、10μg/ml)で処理した後、細胞死滅とELISAを行った。
前記実施例14の結果に基づいて、スフィンゴモナス・パウシモビリス由来の小胞の抗炎症効果を評価するため、様々な濃度(0.1、1、10μg/ml)のスフィンゴモナス・パウシモビリス由来の小胞(SPC101)をマウスマクロファージ細胞株に12時間前処理した後、病原性原因因子である大腸菌由来の小胞1μg/mlを処理し、12時間後に炎症性サイトカインの分泌をELISAで測定した。
前記実施例16の結果に基づいて、他のスフィンゴモナス属細菌の抗炎症効果を評価するため、スフィンゴモナス・コーリエンシス由来の小胞(SPC102)を様々な濃度(0.1、1、10μg/ml)でマウスマクロファージ細胞株に12時間前処理した後、病原性原因因子である大腸菌由来の小胞1μg/mlを処理し、12時間後に炎症性サイトカインの分泌をELISAで測定した。
スフィンゴモナス・パウシモビリス由来の小胞を経口で投与したとき、時間別の臓器内の吸収及び分布を確認するため、以下のような方法で実験を行った。蛍光で標識したスフィンゴモナス・パウシモビリス由来の小胞10μgを経口で投与し、それぞれ1、3、6、32、48、72時間後に蛍光を側定した。マウス全体のイメージの蛍光を観察した結果、経口投与1時間からスフィンゴモナス・パウシモビリス由来の小胞が胃に分布し、3時間からは小腸及び大腸にも分布することを確認し、これらの臓器内の分布が72時間まで維持されることを観察した(図16参照)。
Claims (2)
- 下記段階を含む、肝硬変、肝がん、心筋梗塞、腎不全、糖尿病、脳腫瘍、軽度認知障害、認知症、うつ病及びアトピー性皮膚炎からなる群から選ばれた1以上の疾患の診断のための情報提供方法。
(a)健常者及び被検者のサンプルから分離した小胞からDNAを抽出する段階と、
(b)前記抽出したDNAに対して配列番号1及び配列番号2で表されるプライマーからなるプライマーペアを用いてPCR(Polymerase Chain Reaction)を行った後、それぞれのPCR産物を得る段階と、
(c)前記PCR産物の定量分析を通じて健常者に比べてスフィンゴモナス(Sphingomonas)属細菌由来の小胞の割合が低い場合、肝硬変、肝がん、心筋梗塞、腎不全、糖尿病、脳腫瘍、軽度認知障害、認知症、うつ病及びアトピー性皮膚炎からなる群から選ばれた1以上の疾患であると判定する段階。 - 前記(a)段階におけるサンプルは、血液または尿であることを特徴とする、請求項1に記載の情報提供方法。
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WO2018111028A1 (ko) * | 2016-12-16 | 2018-06-21 | 주식회사 엠디헬스케어 | 세균 메타게놈 분석을 통한 심장질환 진단방법 |
WO2018155950A1 (ko) * | 2017-02-24 | 2018-08-30 | 주식회사 엠디헬스케어 | 세균 메타게놈 분석을 통한 당뇨병 진단 방법 |
KR101940445B1 (ko) * | 2017-02-24 | 2019-01-18 | 주식회사 엠디헬스케어 | 세균 메타게놈 분석을 통한 당뇨병 진단 방법 |
KR102008451B1 (ko) * | 2017-05-26 | 2019-08-07 | 주식회사 엠디헬스케어 | 세균 메타게놈 분석을 통한 자폐증 진단방법 |
KR102130485B1 (ko) | 2017-10-13 | 2020-07-06 | 주식회사 엠디헬스케어 | 세균 메타게놈 분석을 통한 알츠하이머치매 진단방법 |
WO2019074216A1 (ko) * | 2017-10-13 | 2019-04-18 | 주식회사 엠디헬스케어 | 세균 메타게놈 분석을 통한 알츠하이머치매 진단방법 |
RU2727540C1 (ru) | 2019-11-22 | 2020-07-22 | федеральное государственное автономное образовательное учреждение высшего образования "Казанский (Приволжский) федеральный университет" (ФГАОУ ВО КФУ) | Применение мембранных везикул мультипотентных стромальных клеток, индуцированных цитохалазином В, для восстановления и повышения митохондриальной функции |
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Japanese Journal of Lactic Acid Bacteria,2012年,Vol.23, No.1,p.24-33 |
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US11529377B2 (en) | 2022-12-20 |
JP2022106991A (ja) | 2022-07-20 |
EP3896174A1 (en) | 2021-10-20 |
MX2021002409A (es) | 2021-04-28 |
CL2021000414A1 (es) | 2021-09-20 |
MY195855A (en) | 2023-02-23 |
AU2019399286B2 (en) | 2023-06-08 |
JP2021534777A (ja) | 2021-12-16 |
US11944652B2 (en) | 2024-04-02 |
US20230190826A1 (en) | 2023-06-22 |
JP7378847B2 (ja) | 2023-11-14 |
KR102242196B1 (ko) | 2021-04-20 |
KR20200070991A (ko) | 2020-06-18 |
SG11202101841QA (en) | 2021-03-30 |
CA3111069A1 (en) | 2020-06-18 |
PH12021550438A1 (en) | 2021-11-22 |
US20220062353A1 (en) | 2022-03-03 |
BR112021003775A2 (pt) | 2021-05-25 |
CN112654722A (zh) | 2021-04-13 |
IL281117A (en) | 2021-04-29 |
EP3896174A4 (en) | 2022-08-17 |
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