KR20220118788A - Pharmaceutical composition for preventing or treating of nonalcoholic fatty liver disease comprising stimulator of expression or activity of EWSR1 - Google Patents
Pharmaceutical composition for preventing or treating of nonalcoholic fatty liver disease comprising stimulator of expression or activity of EWSR1 Download PDFInfo
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- KR20220118788A KR20220118788A KR1020210022657A KR20210022657A KR20220118788A KR 20220118788 A KR20220118788 A KR 20220118788A KR 1020210022657 A KR1020210022657 A KR 1020210022657A KR 20210022657 A KR20210022657 A KR 20210022657A KR 20220118788 A KR20220118788 A KR 20220118788A
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- ewsr1
- protein
- nonalcoholic steatohepatitis
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Abstract
Description
본 발명은 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 치료용 약학적 조성물에 관한 것으로, 보다 상세하게는 EWSR1(Ewing sarcoma breakpoint region 1) 유전자의 mRNA 또는 이의 단백질 발현 정도를 측정할 수 있는 제제를 포함하는 비알콜성 지방간질환 진단용 조성물, 이를 이용한 비알콜성 지방간질환을 진단하는 방법, 비알콜성 지방간질환 진단 키트 및 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 치료용 약학적 조성물에 관한 것이다. The present invention relates to a pharmaceutical composition for preventing or treating nonalcoholic steatohepatitis comprising an expression or activity promoter of EWSR1, and more particularly, measuring the mRNA or protein expression level of EWSR1 (Ewing sarcoma breakpoint region 1) gene. A composition for diagnosing nonalcoholic fatty liver disease comprising a preparation capable of or to a pharmaceutical composition for treatment.
간은 영양소 대사의 중심 역할을 하는 장기로서, 정상적인 사람의 간은 약 1,500g의 무게를 가지며 간질환이 발병하여 간 기능 이상이 초래되면 생체의 영양소 대사에 문제가 생기는 바, 구체적으로 포도당을 글리코겐으로 만들거나 또는 단백질을 알부민으로 전환하거나 불필요한 것을 분해하여 쓸개즙으로 전달하는 등의 간 기능에 이상이 생긴다.The liver is an organ that plays a central role in nutrient metabolism, and a normal human liver weighs about 1,500 g. It causes abnormalities in liver function, such as converting protein into albumin, or breaking down unnecessary substances and delivering them to the bile.
다양한 간질환 중 비알콜성 지방간질환(Nonalcoholic fatty liver disease, NAFLD)은 가장 흔하게 나타나는 간질환으로, 술을 마시지 않거나 거의 마시지 않는 사람에게 주로 생기는 지방간을 일컫는다. 비알콜성 지방간의 증상은 간 손상을 일으키지 않는 단순한 지방증에서 비알콜성 지방간염(Nonalcoholic Steatohepatitis, NASH)에 이르기까지 그 정도가 다양한데, 이중 가장 심각한 형태인 비알콜성 지방간염은 간경변 및 간암으로까지 진행할 수 있다. 이러한 비알콜성 지방간질환의 원인은 비만, 혈중 지방질의 농도가 높은 고지혈증 또는 당뇨병 등의 질병, 약물, 심각한 영양 부족 등으로 추정되고 있다.Among various liver diseases, nonalcoholic fatty liver disease (NAFLD) is the most common liver disease and refers to fatty liver that occurs mainly in people who drink little or no alcohol. Symptoms of nonalcoholic fatty liver vary in severity from simple steatosis that does not cause liver damage to nonalcoholic steatohepatitis (NASH). can proceed. The causes of nonalcoholic fatty liver disease are estimated to be obesity, diseases such as hyperlipidemia or diabetes with high blood lipid concentrations, drugs, and severe nutritional deficiencies.
RNA 결합 단백인 Ewing sarcoma breakpoint region 1 (EWSR1) 단백은 multifunctional RNA/ssDNA 결합 단백질로 Fli-1이나 ERG와 같은 oncogene들과 fusion되어 암의 형성에 관여하며 정상 세포에서는 transformation하는 dominant oncogene으로 알려져 있다. 이 이러한 연구를 바탕으로 현재 EWSR1을 각종 암의 진단으로 사용을 많이 한다. 그러나 현재까지 EWSR1을 이용하여 비알콜성 지방간질환을 진단, 예후 바이오마커와 치료제에 대한 연구는 미비하다. Ewing sarcoma breakpoint region 1 (EWSR1), an RNA-binding protein, is a multifunctional RNA/ssDNA binding protein that is fused with oncogenes such as Fli-1 and ERG to participate in cancer formation and is known as a dominant oncogene that transforms in normal cells. Based on these studies, EWSR1 is currently widely used for diagnosis of various cancers. However, until now, studies on non-alcoholic fatty liver disease diagnosis, prognostic biomarkers and therapeutics using EWSR1 are insufficient.
이에 본 발명에서는 비알콜성 지방간질환을 진단할 수 있는 바이오마커를 선별하기 위해 예의 노력한 결과, 비알콜성 간질환 환자의 간 조직에서 EWSR1이 감소하고, 혈청 내 발현은 증가하는 것을 확인하였고, 이를 통해 고지방 식이로 유도된 비알콜성 지방간 마우스 모델에 EWSR1 유전자를 삽입한 결과 몸무게 감소와 간 조직 내 지방 축적 정도가 억제되는 것을 확인하였으므로, EWSR1은 비알콜성 지방간 진단, 예후용 바이오 마커 및 이를 포함하는 비알콜성 지방간질환의 예방 또는 치료용 약학적 조성물로 사용될 수 있음을 확인하고, 본 발명을 완성하였다.Accordingly, in the present invention, as a result of diligent efforts to select biomarkers capable of diagnosing nonalcoholic fatty liver disease, it was confirmed that EWSR1 decreased in liver tissue of patients with nonalcoholic liver disease and increased serum expression. As a result of inserting the EWSR1 gene into a non-alcoholic fatty liver mouse model induced by a high-fat diet, it was confirmed that weight loss and the degree of fat accumulation in the liver tissue were suppressed. It was confirmed that it can be used as a pharmaceutical composition for the prevention or treatment of non-alcoholic fatty liver disease, and the present invention has been completed.
본 발명의 목적은 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 치료용 약학적 조성물을 제공하는데 있다. It is an object of the present invention to provide a pharmaceutical composition for preventing or treating nonalcoholic steatohepatitis comprising an agent that promotes the expression or activity of EWSR1.
본 발명의 다른 목적은 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 개선용 건강기능식품조성을 제공하는데 있다. Another object of the present invention is to provide a health functional food composition for preventing or improving non-alcoholic steatohepatitis, comprising an EWSR1 expression or activity promoter.
본 발명의 또 다른 목적은 EWSR1(Ewing sarcoma breakpoint region 1) 유전자의 mRNA 또는 단백질 수준을 측정하는 제제를 포함하는 비알콜성 지방간염 진단용 바이오 마커 조성물을 제공하는 데 있다. Another object of the present invention is to provide a biomarker composition for diagnosing nonalcoholic steatohepatitis, comprising an agent for measuring mRNA or protein level of Ewing sarcoma breakpoint region 1 (EWSR1) gene.
본 발명의 다른 목적은 상기 비알콜성 지방간염 진단용 바이오 마커 조성물을 포함하는 비알콜성 지방간염 진단용 키트를 제공하는 데 있다. Another object of the present invention is to provide a kit for diagnosing nonalcoholic steatohepatitis comprising the biomarker composition for diagnosing nonalcoholic steatohepatitis.
본 발명의 또 다른 목적은 상기 비알콜성 지방간염 진단용 조성물을 이용한 비알콜성 지방간염 진단을 위한 정보를 제공하는 방법을 제공하는데 있다. Another object of the present invention is to provide a method for providing information for diagnosing nonalcoholic steatohepatitis using the composition for diagnosis of nonalcoholic steatohepatitis.
본 발명의 또 다른 목적은 상기 비알콜성 지방간염 진단용 조성물을 이용하여 비알콜성 지방간염 치료제의 스크리닝 방법을 제공하는 데 있다. Another object of the present invention is to provide a screening method for a therapeutic agent for nonalcoholic steatohepatitis using the composition for diagnosis of nonalcoholic steatohepatitis.
상기 목적을 달성하기 위해, 본 발명은 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 치료용 약학적 조성물을 제공할 수 있다. In order to achieve the above object, the present invention may provide a pharmaceutical composition for preventing or treating nonalcoholic steatohepatitis comprising an agent that promotes the expression or activity of EWSR1.
본 발명은 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 개선용 건강기능식품조성을 제공할 수 있다. The present invention can provide a health functional food composition for preventing or improving non-alcoholic steatohepatitis comprising an agent that promotes the expression or activity of EWSR1.
본 발명은 EWSR1(Ewing sarcoma breakpoint region 1) 유전자의 mRNA 또는 단백질 수준을 측정하는 제제를 포함하는 비알콜성 지방간염 진단용 바이오 마커 조성물을 제공한다. The present invention provides a biomarker composition for diagnosing nonalcoholic steatohepatitis, comprising an agent for measuring the mRNA or protein level of the Ewing sarcoma breakpoint region 1 (EWSR1) gene.
본 발명의 바람직한 일실시예에 있어서, 상기 mRNA 수준을 측정하는 제제는 상기 EWSR1유전자에 특이적으로 결합하는 프라이머쌍, 프로브 또는 안티센스 뉴클레오타이드일 수 있다.In a preferred embodiment of the present invention, the agent for measuring the mRNA level may be a primer pair, a probe, or an antisense nucleotide that specifically binds to the EWSR1 gene.
본 발명의 바람직한 또 다른 일실시예에 있어서, 상기 단백질 수준을 측정하는 제제는 상기 EWSR1 단백질 또는 펩타이드 단편에 특이적으로 결합하는 항체, 상호작용 단백질, 리간드, 나노입자(nanoparticles) 또는 압타머(aptamer)를 포함할 수 있다. In another preferred embodiment of the present invention, the agent for measuring the protein level is an antibody, interacting protein, ligand, nanoparticles or aptamer that specifically binds to the EWSR1 protein or peptide fragment. ) may be included.
또한, 본 발명은 상기 비알콜성 지방간염 진단용 바이오 마커 조성물을 포함하는 비알콜성 지방간염 진단용 키트를 제공한다.In addition, the present invention provides a non-alcoholic steatohepatitis diagnostic kit comprising the biomarker composition for diagnosing non-alcoholic steatohepatitis.
본 발명의 바람직한 또 다른 일실시예에 있어서, 상기 키트는 RT-PCR(Reverse transcription polymerase chain reaction) 키트, DNA 칩 키트, ELISA(enzyme linked immunosorbent assay) 키트, 단백질 칩 키트, 래피드(rapid) 키트 또는 MRM(Multiple reaction monitoring) 키트일 수 있다.In another preferred embodiment of the present invention, the kit is a reverse transcription polymerase chain reaction (RT-PCR) kit, a DNA chip kit, an ELISA (enzyme linked immunosorbent assay) kit, a protein chip kit, a rapid kit or It may be a multiple reaction monitoring (MRM) kit.
또한, 본 발명은 (a) 환자의 생물학적 시료로부터 EWSR1 유전자의 mRNA 또는 이의 단백질 발현 수준을 측정하는 단계; 및 In addition, the present invention comprises the steps of (a) measuring the mRNA or protein expression level of the EWSR1 gene from a patient's biological sample; and
(b) 상기 mRNA 또는 단백질 발현 수준을 대조군 시료와 비교하는 단계를 포함하는 비알콜성 지방간염 진단을 위한 정보를 제공하는 방법을 제공할 수 있다. (b) it is possible to provide a method of providing information for the diagnosis of nonalcoholic steatohepatitis comprising the step of comparing the mRNA or protein expression level with a control sample.
본 발명의 바람직한 일실시예에 있어서, 상기 만성간질환 진단에 대한 정보 제공방법은 EWSR1 유전자의 mRNA의 발현 정도가 대조군에 비해 증가하면 비알콜성 지방간염인 것으로 정보를 제공하는 단계를 추가로 포함할 수 있다. In a preferred embodiment of the present invention, the information providing method for the diagnosis of chronic liver disease further comprises providing information as non-alcoholic steatohepatitis when the mRNA expression level of the EWSR1 gene increases compared to the control group. can do.
본 발명의 바람직한 또 다른 일실시예에 있어서, 상기 mRNA 발현 정도 측정은 역전사효소 중합효소반응, 경쟁적 역전사효소 중합효소반응, 실시간 역전사효소 중합효소반응, RNase 보호 분석법, 노던 블랏팅 또는 DNA 칩을 이용하여 수행할 수 있다.In another preferred embodiment of the present invention, the mRNA expression level is measured using a reverse transcriptase polymerase reaction, a competitive reverse transcriptase polymerase reaction, a real-time reverse transcriptase polymerase reaction, an RNase protection assay, Northern blotting or a DNA chip. can be done by
본 발명의 바람직한 일실시예에 있어서, 상기 만성간질환 진단에 대한 정보 제공방법은 환자의 생물학적 시료가 간 조직일 경우 EWSR1 단백질의 발현 정도가 대조군에 비해 감소하면 비알콜성 지방간염인 것으로 정보를 제공하는 단계를 추가로 포함할 수 있다. In a preferred embodiment of the present invention, the information providing method for the diagnosis of chronic liver disease provides information as non-alcoholic steatohepatitis when the expression level of EWSR1 protein is decreased compared to the control when the biological sample of the patient is liver tissue. It may further include the step of providing.
본 발명의 바람직한 일실시예에 있어서, 상기 만성간질환 진단에 대한 정보 제공방법은 환자의 생물학적 시료가 혈청일 경우 EWSR1 단백질의 발현 정도가 대조군에 비해 증가하면 비알콜성 지방간염인 것으로 정보를 제공하는 단계를 추가로 포함할 수 있다. In a preferred embodiment of the present invention, the information providing method for the diagnosis of chronic liver disease provides information as non-alcoholic steatohepatitis when the expression level of EWSR1 protein increases compared to the control when the patient's biological sample is serum. It may further include the step of
본 발명의 바람직한 또 다른 일실시예에 있어서, 상기 단백질 발현 정도 측정은 단백질 칩 분석, 면역측정법, 리간드 바인딩 어세이, MALDI-TOF(Matrix Desorption/Ionization Time of Flight Mass Spectrometry)분석, SELDI-TOF(Sulface Enhanced Laser Desorption/Ionization Time of Flight Mass Spectrometry)분석, 방사선 면역분석, 방사 면역 확산법, 오우크테로니 면역 확산법, 로케트 면역전기영동, 조직면역 염색, 보체 고정 분석법, 2차원 전기영동 분석, 액상 크로마토그래피-질량분석(liquid chromatography-Mass Spectrometry, LC-MS), LC-MS/MS(liquid chromatography-Mass Spectrometry/ Mass Spectrometry), 웨스턴 블랏 및 ELISA(enzyme linked immunosorbent assay)를 이용하여 수행할 수 있다.In another preferred embodiment of the present invention, the protein expression level measurement is a protein chip analysis, immunoassay, ligand binding assay, MALDI-TOF (Matrix Desorption/Ionization Time of Flight Mass Spectrometry) analysis, SELDI-TOF ( Sulface Enhanced Laser Desorption/Ionization Time of Flight Mass Spectrometry (Sulface Enhanced Laser Desorption/Ionization Time of Flight Mass Spectrometry) analysis, radioimmunoassay, radioimmunodiffusion method, Oakteroni immunodiffusion method, rocket immunoelectrophoresis, tissue immunostaining, complement fixation assay, 2D electrophoresis analysis, liquid chromatography It can be performed using liquid chromatography-Mass Spectrometry (LC-MS), liquid chromatography-Mass Spectrometry/Mass Spectrometry (LC-MS/MS), Western blot and ELISA (enzyme linked immunosorbent assay).
또한 본 발명은 a) 동물의 간에서 EWSR1 유전자의 mRNA 발현 수준 또는 EWSR1 단백질의 발현 수준을 측정하는 단계; (b) 상기 동물에 시험 물질을 처리하는 단계; (c) 상기 시험물질을 처리한 동물의 간에서 EWSR1 유전자의 mRNA 발현 수준 또는 EWSR1 단백질의 발현 수준을 측정하는 단계; 및 (d) 상기 단계 (a)에서 측정한 EWSR1 유전자의 mRNA 발현 수준 또는 EWSR1 단백질의 발현 수준과 비교하여, 상기 단계 (c)에서 측정한 EWSR1 유전자의 mRNA 발현 수준이 낮아지거나 EWSR1 단백질의 발현 수준이 증가한 물질을 선별하는 단계를 포함하는 것을 특징으로 하는 비알콜성 지방간염 치료제의 스크리닝 방법을 제공한다.In addition, the present invention comprises the steps of: a) measuring the mRNA expression level of the EWSR1 gene or the expression level of the EWSR1 protein in the liver of an animal; (b) treating the animal with a test substance; (c) measuring the mRNA expression level of the EWSR1 gene or the expression level of the EWSR1 protein in the liver of the animal treated with the test substance; And (d) compared with the mRNA expression level of the EWSR1 gene or the expression level of the EWSR1 protein measured in step (a), the mRNA expression level of the EWSR1 gene measured in step (c) is lowered or the expression level of the EWSR1 protein It provides a screening method for a therapeutic agent for nonalcoholic steatohepatitis, comprising the step of selecting the increased substance.
본 발명에서 비알콜성 지방간을 유도한 세포 모델에서 EWSR1의 RNA이 크게 증가한 반면 EWSR1 단백질의 발현은 유의적으로 감소하였고, EWSR1 knock-out mice의 간 조직 DNA micro-array를 수행한 결과 EWSR1의 발현 저하가 간 세포내 지방 대사의 항상성 조절에 영향을 준다는 사실을 확인하였으며, 임상적으로도 비알콜성 지방간염환자의 간 조직내 EWSR1의 발현은 감소하였고, 혈청 내 발현은 증가하는 확인함으로써, EWSR1이 비알콜성 지방간질환을 진단할 수 있는 효과가 있다. 고지방 식이로 유도된 비알콜성 지방간 마우스 모델에 EWSR1을 과발현한 결과 몸무게 증가와 간 조직내 지방 축적이 감소하는 효과가 있다. 이를 이용하여 EWSR1을 발현 또는 촉진제로 비알콜성 지방간을 치료할 수 있는 효과가 있다.In the present invention, RNA of EWSR1 was significantly increased, whereas expression of EWSR1 protein was significantly decreased in the cell model inducing nonalcoholic fatty liver. It was confirmed that the decrease affects the homeostatic regulation of intracellular fat metabolism. Clinically, the expression of EWSR1 in the liver tissue of nonalcoholic steatohepatitis patients was decreased and the expression in the serum was increased. It is effective in diagnosing this nonalcoholic fatty liver disease. As a result of overexpression of EWSR1 in a non-alcoholic fatty liver mouse model induced by a high-fat diet, weight gain and fat accumulation in the liver tissue were reduced. Using this, there is an effect of treating nonalcoholic fatty liver with EWSR1 expression or promoter.
도 1은 간 세포주인 FL83B에서 지방 축적에 따른 EWSR1 발현을 확인한 결과이다.
도 2는 비알콜성 지방간질환이 진행됨에 따른 EWSR1의 발현을 확인한 결과이다.
도 3는 단순지방간과 비알콜성지방간염 환자의 간조직과 혈청에서의 EWSR1 발현을 확인한 결과이다.
도 4는 간세포주에 PA와 pFlag-EWSR1 발현 벡터를 세포내 주입 시켰을 때 지방 축적 정도와 신호전달기전을 확인한 결과이다.
도 5은 고지방 식이로 유도된 비알콜성 지방간 마우스 모델에 EWSR1 유전자를 쥐에 주입했을 때 몸무게 와 간 조직내 지방 축적을 확인한 결과이다. 1 is a result of confirming the expression of EWSR1 according to fat accumulation in the liver cell line FL83B.
2 is a result confirming the expression of EWSR1 as nonalcoholic fatty liver disease progresses.
3 is a result confirming the expression of EWSR1 in liver tissue and serum of patients with simple fatty liver and nonalcoholic steatohepatitis.
4 is a result confirming the degree of fat accumulation and signaling mechanism when PA and pFlag-EWSR1 expression vector were intracellularly injected into hepatocytes.
5 is a result confirming body weight and fat accumulation in liver tissue when the EWSR1 gene is injected into a mouse model of non-alcoholic fatty liver induced by a high-fat diet.
하, 본 발명을 상세하게 설명한다. Hereinafter, the present invention will be described in detail.
본 발명은 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 치료용 약학적 조성물을 제공할 수 있다. The present invention may provide a pharmaceutical composition for preventing or treating non-alcoholic steatohepatitis comprising an agent that promotes the expression or activity of EWSR1.
지방 식이로 유도된 비알콜성 지방간 마우스 모델에 EWSR1 과발현 벡터(pFlag-EWSR1)를 이용하여 EWSR1을 과발현한 결과 몸무게 증가와 간 조직내 지방 축적이 감소하였다 (도 5). As a result of overexpression of EWSR1 using the EWSR1 overexpression vector (pFlag-EWSR1) in a non-alcoholic fatty liver mouse model induced by a fat diet, weight gain and fat accumulation in liver tissue were reduced ( FIG. 5 ).
본 발명에서 EWSR1(Ewing sarcoma breakpoint region 1)의 “발현 또는 활성 촉진제”란 EWSR1에 직접 또는 간접적으로 작용하여 EWSR1의 발현 또는 활성을 개선, 유도, 자극, 증가시키는 물질을 의미한다. 이런 물질은 유기 또는 무기 화합물과 같은 단일 화합물, 펩타이드, 단백질, 핵산, 탄수화물 및 지질과 같은 생체 고분자 화합물 및 복수 화합물의 복합체 등을 포함한다. 상기 물질이 상기 EWSR1의 발현 또는 활성을 촉진시키는 기작은 특별히 제한되지 않는다. 예를 들어, 물질은 전사, 번역 등의 유전자 발현을 증대시키거나, 비활성형을 활성형으로 전환시키는 기작으로 작용할 수 있다. 바람직하게는, EWSR1의 발현 또는 활성을 촉진시키는 물질은 펩타이드, 단백질, 핵산, 탄수화물 및 지질과 같은 생체 고분자 화합물이다. 핵산 및 단백질 서열이 이미 공지된 EWSR1에 대하여 당업자는 촉진제로 작용하는 유기 또는 무기 화합물과 같은 단일 화합물 펩타이드, 단백질, 핵산, 탄수화물 및 지질과 같은 생체 고분자 화합물 및 복수 화합물의 복합체 등을 당 분야의 기술을 이용하여 제조하거나 스크리닝 할 수 있다.In the present invention, "expression or activity promoter" of EWSR1 (Ewing sarcoma breakpoint region 1) refers to a substance that improves, induces, stimulates, or increases the expression or activity of EWSR1 by acting directly or indirectly on EWSR1. Such substances include single compounds such as organic or inorganic compounds, biopolymers such as peptides, proteins, nucleic acids, carbohydrates and lipids, and complexes of multiple compounds. The mechanism by which the substance promotes the expression or activity of EWSR1 is not particularly limited. For example, the substance may act as a mechanism for increasing gene expression such as transcription and translation, or converting an inactive form into an active form. Preferably, the substance that promotes the expression or activity of EWSR1 is a biopolymer compound such as a peptide, a protein, a nucleic acid, a carbohydrate, and a lipid. For EWSR1, whose nucleic acid and protein sequence are already known, those skilled in the art can prepare single compound peptides such as organic or inorganic compounds that act as promoters, biopolymer compounds such as proteins, nucleic acids, carbohydrates and lipids, and complexes of multiple compounds, etc. can be prepared or screened using
본 발명의 EWSR1의 발현 또는 활성 촉진제는 유전자 치료 등에 사용되기 위하여 세포 내에서 EWSR1을 발현할 수 있는 벡터의 형태로 제공될 수 있다. 이에, 본 발명은 EWSR1을 코딩하는 핵산, 바람직하게는 이 핵산을 함유하는 재조합 벡터를 유효성분으로 포함하는 비알콜성 지방간염 예방 또는 치료용 약학적 조성물에 관한 것이다.The EWSR1 expression or activity promoter of the present invention may be provided in the form of a vector capable of expressing EWSR1 in cells for use in gene therapy or the like. Accordingly, the present invention relates to a pharmaceutical composition for preventing or treating nonalcoholic steatohepatitis comprising a nucleic acid encoding EWSR1, preferably, a recombinant vector containing the nucleic acid as an active ingredient.
EWSR1을 코딩하는 핵산 서열은, 이와 동등한 활성을 갖는 단백질을 코딩하는 한, 하나 이상의 핵산 염기가 치환, 결실, 삽입 또는 이들의 조합에 의해 변이될 수 있다. 이러한 핵산 분자의 서열은 단쇄 또는 이중쇄일 수 있으며, DNA 분자 또는 RNA(mRNA) 분자일 수 있다.In the nucleic acid sequence encoding EWSR1, one or more nucleic acid bases may be mutated by substitution, deletion, insertion, or a combination thereof, as long as it encodes a protein having an activity equivalent thereto. The sequence of such a nucleic acid molecule may be single-stranded or double-stranded, and may be a DNA molecule or an RNA (mRNA) molecule.
본 발명의 벡터는, 리포좀, 플라스미드 벡터, 코즈미드 벡터, 박테리오파아지 벡터 및 바이러스 벡터 등을 포함하나, 이에 제한되지 않는다. 본 발명에서, 바람직한 바이러스 벡터의 예로는 아데노바이러스(adenovirus), 아데노부속바이러스(adeno-associated virus), 레트로바이러스(retrovirus), 렌티바이러스(lentivirus), 단순포진 바이러스(herpes simplex virus), 알파바이러스(alpha virus) 등이 있다. 본 발명의 재조합 벡터는 EWSR1을 코딩하는 핵산과 이의 전사 또는 해독을 위한 조절서열을 포함할 수 있다. 특히 중요한 조절서열은 프로모터, 인핸서와 같이 전사 개시를 조절하는 것이다. 또한, 개시코돈, 종결코돈, 폴리아데닐화 시그널, 코작(Kozak), 인핸서, 막 표적화 및 분비를 위한 신호서열, IRES(Internal Ribosome Entry Site) 등으로 이루어진 조절 서열을 포함할 수 있다. 이러한 조절서열과 EWSR1을 코딩하는 핵산은 작동가능하게 연결되어야 할 것이다.The vector of the present invention includes, but is not limited to, a liposome, a plasmid vector, a cosmid vector, a bacteriophage vector and a viral vector. In the present invention, examples of preferred viral vectors include adenovirus, adeno-associated virus, retrovirus, lentivirus, herpes simplex virus, alphavirus ( alpha virus). The recombinant vector of the present invention may include a nucleic acid encoding EWSR1 and regulatory sequences for transcription or translation thereof. Particularly important regulatory sequences are those that regulate transcription initiation, such as promoters and enhancers. In addition, it may include a regulatory sequence consisting of a start codon, a stop codon, a polyadenylation signal, Kozak, an enhancer, a signal sequence for membrane targeting and secretion, an IRES (Internal Ribosome Entry Site), and the like. This regulatory sequence and the nucleic acid encoding EWSR1 should be operably linked.
여기서, 이용된 용어 '작동가능하게 연결된'이란 핵산 서열간의 결합이 기능적으로 연관되어 있는 것을 의미한다. 임의의 핵산서열이 작동가능하게 연결된 경우는 임의의 핵산서열이 다른 핵산서열과 기능적으로 관련성을 가지도록 위치해 있는 경우이다. 본 발명에 있어서, 임의의 전사 조절서열이 EWSR1을 코딩하는 핵산분자의 전사에 영향을 미치는 경우, 상기 전사 조절서열이 상기 핵산분자와 작동가능하게 연결되어 있다고 말한다. 본 발명에서, 치료는 비알콜성 지방간염을 억제, 예방하거나, 비알콜성 지방간염과 관련된 증상을 감소, 경감, 역전시키고 비알콜성 지방간염의 진행을 억제하는 것을 포함한다.As used herein, the term 'operably linked' means that the binding between nucleic acid sequences is functionally linked. When any nucleic acid sequence is operably linked, any nucleic acid sequence is positioned such that it is functionally related to another nucleic acid sequence. In the present invention, when any transcriptional regulatory sequence affects the transcription of a nucleic acid molecule encoding EWSR1, it is said that the transcriptional regulatory sequence is operably linked to the nucleic acid molecule. In the present invention, treatment includes inhibiting, preventing, or reducing, alleviating, or reversing the symptoms associated with nonalcoholic steatohepatitis and inhibiting the progression of nonalcoholic steatohepatitis.
본 발명의 약학 조성물은 화학물질, 뉴클레오타이드, 안티센스, siRNA 올리고 뉴클레오타이드 및 천연물 추출물을 유효성분으로 포함할 수 있다. 본 발명의 약학 조성물 또는 복합 제제는 유효 성분 이외에 약제학적으로 적합하고 생리학적으로 허용되는 보조제를 사용하여 제조될 수 있으며, 상기 보조제로는 부형제, 붕해제, 감미제, 결합제, 피복제, 팽창제, 윤활제, 활택제 또는 향미제 등의 가용화제를 사용할 수 있다.The pharmaceutical composition of the present invention may include chemicals, nucleotides, antisense, siRNA oligonucleotides, and natural product extracts as active ingredients. The pharmaceutical composition or combination formulation of the present invention may be prepared using a pharmaceutically suitable and physiologically acceptable adjuvant in addition to the active ingredient, and the adjuvant includes an excipient, a disintegrant, a sweetener, a binder, a coating agent, a swelling agent, and a lubricant. , a solubilizing agent such as a lubricant or a flavoring agent may be used.
본 발명의 약학 조성물은 투여를 위해서 유효 성분 이외에 추가로 약제학적으로 허용 가능한 담체를 1 종 이상 포함하여 약학 조성물로 바람직하게 제제화할 수 있다. 액상 용액으로 제제화되는 조성물에 있어서 허용 가능한 약제학적 담체로는, 멸균 및 생체에 적합한 것으로서, 식염수, 멸균수, 링거액, 완충 식염수, 알부민 주사용액, 덱스트로즈 용액, 말토 덱스트린 용액, 글리세롤, 에탄올 및 이들 성분 중 1 성분 이상을 혼합하여 사용할 수 있으며, 필요에 따라 항산화제, 완충액, 정균제 등 다른 통상의 첨가제를 첨가할 수 있다. 또한 희석제, 분산제, 계면활성제, 결합제 및 윤활제를 부가적으로 첨가하여 수용액, 현탁액, 유탁액 등과 같은 주사용 제형, 환약, 캡슐, 과립 또는 정제로 제제화할 수 있다.The pharmaceutical composition of the present invention may be preferably formulated into a pharmaceutical composition including one or more pharmaceutically acceptable carriers in addition to the active ingredient for administration. In the composition formulated as a liquid solution, acceptable pharmaceutical carriers are sterile and biocompatible, and include saline, sterile water, Ringer's solution, buffered saline, albumin injection, dextrose solution, maltodextrin solution, glycerol, ethanol and One or more of these components may be mixed and used, and other conventional additives such as antioxidants, buffers, and bacteriostats may be added as needed. In addition, diluents, dispersants, surfactants, binders and lubricants may be additionally added to form an injectable formulation such as an aqueous solution, suspension, emulsion, etc., pills, capsules, granules or tablets.
본 발명의 약학 조성물의 약제 제제 형태는 과립제, 산제, 피복정, 정제, 캡슐제, 좌제, 시럽, 즙, 현탁제, 유제, 점적제 또는 주사 가능한 액제 및 활성 화합물의 서방출형 제제 등이 될 수 있다. 본 발명의 약학 조성물 정맥내, 동맥내, 복강내, 근육내, 동맥내, 복강내, 흉골내, 경피, 비측내, 흡입, 국소, 직장, 경구, 안구내 또는 피내 경로를 통해 통상적인 방식으로 투여할 수 있다.The pharmaceutical formulation of the pharmaceutical composition of the present invention may be granules, powders, coated tablets, tablets, capsules, suppositories, syrups, juices, suspensions, emulsions, drops or injectable solutions and sustained-release formulations of the active compound. can Pharmaceutical compositions of the present invention in a conventional manner via intravenous, intraarterial, intraperitoneal, intramuscular, intraarterial, intraperitoneal, intrasternal, transdermal, intranasal, inhalational, topical, rectal, oral, intraocular or intradermal routes can be administered.
본 발명의 약학 조성물의 적합한 투여량은 환자의 상태 및 체중, 질병의 정도, 약물형태, 시간에 따라 다르지만 당업자에 의해 적절하게 선택될 수 있으며, 필요에 따라 일일 1회 내지 수회로 나누어 투여할 수 있다.A suitable dosage of the pharmaceutical composition of the present invention varies depending on the patient's condition and weight, the degree of disease, drug form, and time, but may be appropriately selected by those skilled in the art, and may be administered once or several times a day as needed. have.
본 발명은 EWSR1의 발현 또는 활성 촉진제를 포함하는 비알콜성 지방간염 예방 또는 이의 발현 단백질을 포함하는 비알콜성 지방간염 예방 또는 개선용 건강기능식품조성을 제공할 수 있다. The present invention can provide a health functional food composition for preventing or improving nonalcoholic steatohepatitis comprising an expression or activity promoter for EWSR1 or for preventing or improving nonalcoholic steatohepatitis comprising an expression protein thereof.
상기 건강기능식품 조성물은 여러 가지 영양제, 비타민, 광물(전해질), 합성 풍미제 및 천연 풍미제 등의 풍미제, 착색제 및 중진제(치즈, 초콜릿 등), 펙트산 및 그의 염, 알긴산 및 그의 염, 유기산, 보호성 콜로이드 증점제, pH 조절제, 안정화제, 방부제, 글리세린, 알코올, 탄산음료에 사용되는 탄산화제 등을 함유할 수 있다. 그밖에 천연 과일 주스, 합성 과일 주스 및 야채 음료의 제조를 위한 과육을 함유할 수 있다. 이러한 성분은 독립적으로 또는 조합하여 사용할 수 있다. 또한, 건강기능식품 조성물은 육류, 소세지, 빵, 초콜릿, 캔디류, 스넥류, 과자류, 피자, 라면, 껌류, 아이스크림류, 스프, 음료수, 차, 기능수, 드링크제, 알코올 및 비타민 복합제 중 어느 하나의 형태일 수 있다.The health functional food composition includes various nutrients, vitamins, minerals (electrolytes), flavoring agents such as synthetic flavoring agents and natural flavoring agents, coloring agents and thickening agents (cheese, chocolate, etc.), pectic acid and its salts, alginic acid and salts thereof , organic acids, protective colloidal thickeners, pH adjusters, stabilizers, preservatives, glycerin, alcohols, carbonation agents used in carbonated beverages, and the like. In addition, it may contain the pulp for the manufacture of natural fruit juices, synthetic fruit juices and vegetable beverages. These components may be used independently or in combination. In addition, the health functional food composition is in the form of any one of meat, sausage, bread, chocolate, candy, snacks, confectionery, pizza, ramen, gum, ice cream, soup, beverage, tea, functional water, drink, alcohol and vitamin complex can be
또한, 상기 건강기능식품 조성물은 식품첨가물을 추가로 포함할 수 있으며, "식품첨가물"로서의 적합 여부는 다른 규정이 없는 한 식품의약품 안정청에 승인된 식품첨가물공전의 총칙 및 일반 시험법 등에 따라 해당 품목에 관한 규격 및 기준에 의하여 판정한다.In addition, the health functional food composition may additionally contain food additives, and whether or not it is suitable as a "food additive" is determined according to the general rules and general test methods of the Food Additives Code approved by the Food and Drug Administration, unless otherwise specified. It is judged according to the standards and standards for
상기 "식품첨가물공전"에 수재된 품목으로 예를 들어, 케톤류, 글리신, 구연산 칼륨, 니코틴산, 계피산 등의 화학적 합성품, 감색소, 감초추출물, 결정셀룰로오스, 고랭색소, 구아검 등의 천연첨가물, L-글루타민산나트륨 제제, 면류 첨가 알칼리제, 보존료제제, 타르색소 제제 등의 혼합 제제류 등을 들 수 있다.As items listed in the "Food Additives Codex", for example, chemical synthetic products such as ketones, glycine, potassium citrate, nicotinic acid, and cinnamic acid, natural additives such as depigmentation, licorice extract, crystalline cellulose, high cold pigment, and guar gum, L - Mixed preparations, such as sodium glutamate preparation, noodle-added alkali agent, preservative preparation, tar color preparation, etc. are mentioned.
본 발명은 EWSR1(Ewing sarcoma breakpoint region 1) 유전자의 mRNA 또는 단백질 수준을 측정하는 제제를 포함하는 비알콜성 지방간염 진단용 바이오 마커 조성물을 제공하는 것이다. An object of the present invention is to provide a biomarker composition for diagnosing nonalcoholic steatohepatitis comprising an agent for measuring mRNA or protein level of Ewing sarcoma breakpoint region 1 (EWSR1) gene.
본 발명에서 사용된 용어 "진단"은 병리 상태의 존재 또는 특징을 확인하는 것을 의미한다. 본 발명의 목적상, 진단은 비알콜성 지방간염 여부를 확인하는 것이다.As used herein, the term “diagnosis” refers to ascertaining the presence or characteristics of a pathological condition. For the purposes of the present invention, diagnosis is to determine whether nonalcoholic steatohepatitis is present.
본 발명에서 사용된 용어 "진단용 바이오마커"란 정상 대조군에 비해 만성 간질환이 진행된 개체에 비해, 특정 유전자 발현 수준 또는 단백질 발현 수준의 유의적인 증가 또는 감소 양상을 보이는 폴리펩티드 또는 핵산(예: mRNA 등), 지질, 당지질, 당단백질, 당(단당류, 이당류, 올리고당류 등) 등과 같은 유기 생체 분자 등을 포함하며, 바람직하게는EWSR1(Ewing sarcoma breakpoint region 1)이다.As used herein, the term "diagnostic biomarker" refers to a polypeptide or nucleic acid (eg, mRNA, etc.) that shows a significant increase or decrease in specific gene expression level or protein expression level, compared to an individual with advanced chronic liver disease compared to a normal control. ), lipids, glycolipids, glycoproteins, and organic biomolecules such as sugars (monosaccharides, disaccharides, oligosaccharides, etc.), preferably Ewing sarcoma breakpoint region 1 (EWSR1).
본 발명의 구체적인 일구현예에서, 비알콜성 지방간을 유도한 세포 모델에서 EWSR1의 RNA이 크게 증가한 반면 EWSR1 단백질의 발현은 유의적으로 감소하였고 (도 1), 지방 식이를 이용해 유도된 비알코올성 지방간 마우스의 간 조직에서 EWSR1의 발현을 WB와 Immunohistochemistry를 통해 확인한 결과, 정상 간 조직에 비해 비알콜성 지방간질환이 진행될수록 EWSR1의 발현이 감소한다는 것을 확인하였다 (도 2). EWSR1 knock-out mice의 간 조직 DNA micro-array를 수행한 결과 EWSR1의 발현 저하가 간 세포내 지방 대사의 항상성 조절에 영향을 준다는 사실을 확인하였다 (도 3). 임상적으로도 비알콜성 지방간염 환자의 간 조직내 EWSR1의 발현은 감소하였고, 혈청 내 발현은 증가하는 확인하였다 (도 4). EWSR1이 AMPK의 활성화 시키고 이로 인해 지방산의 합성을 억제하고 지방산의 산화를 촉진함으로써 세포내 지방 축적을 감소시킨다는 사실을 확인하였다 (도 5). In a specific embodiment of the present invention, the expression of EWSR1 protein was significantly decreased while RNA of EWSR1 was significantly increased in the cell model induced by non-alcoholic fatty liver ( FIG. 1 ), and non-alcoholic fatty liver induced using a fat diet. As a result of confirming the expression of EWSR1 in the liver tissue of mice through WB and Immunohistochemistry, it was confirmed that the expression of EWSR1 decreased as the nonalcoholic fatty liver disease progressed compared to normal liver tissue ( FIG. 2 ). As a result of performing liver tissue DNA micro-array of EWSR1 knock-out mice, it was confirmed that decreased expression of EWSR1 affects the homeostatic regulation of hepatic intracellular fat metabolism (FIG. 3). Clinically, it was confirmed that the expression of EWSR1 in the liver tissue of patients with nonalcoholic steatohepatitis decreased, and the expression in the serum increased ( FIG. 4 ). It was confirmed that EWSR1 activates AMPK, thereby inhibiting fatty acid synthesis and promoting fatty acid oxidation, thereby reducing intracellular fat accumulation (FIG. 5).
본 발명에 사용된 용어 "mRNA 발현수준 측정"이란 생물학적 시료에서 만성 간질환 진단을 위한 바이오마커의 mRNA 존재 여부와 발현 정도를 확인하는 과정으로 mRNA의 양을 측정한다. 이를 위한 분석 방법으로는 역전사 중합효소반응(RT-PCR), 경쟁적 역전사 중합효소반응(Competitive RT-PCR), 실시간 역전사 중합효소반응(Real-time RT-PCR), RNase 보호 분석법(RPA; RNase protection assay), 노던 블랏팅(Northern blotting), DNA 칩 등이 있으나 이로 제한되는 것은 아니다.As used herein, the term “mRNA expression level measurement” refers to a process of determining the presence and expression level of mRNA of a biomarker for diagnosing chronic liver disease in a biological sample, and measuring the amount of mRNA. Analytical methods for this include reverse transcription polymerase reaction (RT-PCR), competitive reverse transcription polymerase reaction (Competitive RT-PCR), real-time reverse transcription polymerase reaction (Real-time RT-PCR), RNase protection assay (RPA; RNase protection) assay), Northern blotting, and a DNA chip, but is not limited thereto.
상기 EWSR1(Ewing sarcoma breakpoint region 1)의 mRNA 수준을 측정하는 제제는 상기 EWSR1의 유전자에 특이적으로 결합하는 프라이머쌍, 프로브 또는 안티센스 뉴클레오타이드인 것을 특징으로 하며, 상기 유전자들의 핵산 정보가 GeneBank 등에 알려져 있으므로 당업자는 상기 서열을 바탕으로 이들 프라이머쌍, 프로브 또는 안티센스 뉴클레오타이드를 디자인할 수 있다.The agent for measuring the mRNA level of Ewing sarcoma breakpoint region 1 (EWSR1) is characterized in that it is a primer pair, probe, or antisense nucleotide that specifically binds to the EWSR1 gene, and the nucleic acid information of the genes is known in GeneBank, etc. Those skilled in the art can design these primer pairs, probes or antisense nucleotides based on the above sequence.
본 발명에서 사용된 용어 "프라이머"는 표적 유전자 서열을 인지하는 단편으로서, 정방향 및 역방향의 프라이머 쌍을 포함하나, 바람직하게는, 특이성 및 민감성을 가지는 분석 결과를 제공하는 프라이머 쌍이다.As used herein, the term "primer" refers to a fragment recognizing a target gene sequence, including a pair of forward and reverse primers, but preferably a primer pair that provides analysis results with specificity and sensitivity.
본 발명에서 사용된 용어 "프로브"란 시료 내의 검출하고자 하는 표적 물질과 특이적으로 결합할 수 있는 물질을 의미하며, 상기 결합을 통하여 특이적으로 시료 내의 표적 물질의 존재를 확인할 수 있는 물질을 의미한다. 프로브의 종류는 당업계에서 통상적으로 사용되는 물질로서 제한은 없으나, 바람직하게는 PNA(peptide nucleic acid), LNA(locked nucleic acid), 펩타이드, 폴리펩타이드, 단백질, RNA 또는 DNA 일 수 있으며, 가장 바람직하게는 PNA이다. As used herein, the term “probe” refers to a substance capable of specifically binding to a target substance to be detected in a sample, and refers to a substance capable of specifically confirming the presence of a target substance in a sample through the binding. do. The type of probe is not limited as a material commonly used in the art, but preferably PNA (peptide nucleic acid), LNA (locked nucleic acid), peptide, polypeptide, protein, RNA or DNA, and most preferably It is PNA.
본 발명에서 사용된 용어 "안티센스"는 안티센스 올리고머가 왓슨-크릭 염기쌍 형성에 의해 RNA 내의 표적 서열과 혼성화되어, 표적서열 내에서 전형적으로 mRNA와 RNA:올리고머 헤테로이중체의 형성을 허용하는 뉴클레오티드 염기의 서열 및 서브유닛간 백본을 갖는 올리고머를 의미한다. 올리고머는 표적 서열에 대한 정확한 서열 상보성 또는 근사 상보성을 가질 수 있다.As used herein, the term "antisense" means that an antisense oligomer is hybridized with a target sequence in RNA by Watson-Crick base pairing, and typically mRNA and RNA: oligomeric heteroduplex formation in the target sequence. It refers to an oligomer having a sequence and an inter-subunit backbone. An oligomer may have exact sequence complementarity or approximate complementarity to a target sequence.
본 발명에 있어서, 상기 EWSR1의 단백질 수준을 측정하는 제제는 상기 단백질 또는 펩타이드 단편에 특이적으로 결합하는 항체, 상호작용 단백질, 리간드, 나노입자(nanoparticles) 또는 압타머(aptamer)인 것을 특징으로 할 수 있다. In the present invention, the agent for measuring the protein level of EWSR1 is an antibody that specifically binds to the protein or peptide fragment, an interacting protein, a ligand, nanoparticles or an aptamer. can
본 발명에 사용된 용어 "단백질 발현수준 측정"이란 생물학적 시료에서 만성 간질환 진단을 위한 바이오 마커로서, 상기 EWSR1의 단백질 수준을 측정하는 제제는 상기 단백질 또는 펩타이드 단편에 특이적으로 결합하는 항체, 상호작용 단백질, 리간드, 나노입자(nanoparticles) 또는 압타머(aptamer)인 것을 특징으로 할 수 있다. As used herein, the term "measurement of protein expression level" is a biomarker for diagnosing chronic liver disease in a biological sample, and the agent for measuring the protein level of EWSR1 is an antibody that specifically binds to the protein or peptide fragment, mutual It may be characterized as a functional protein, ligand, nanoparticles or aptamer.
본 발명에 사용된 용어 "단백질 발현수준 측정"이란 생물학적 시료에서 만성 간질환 진단을 위한 바이오마커로부터 발현된 단백질의 존재 여부와 발현 정도를 확인하는 과정이다. 상기 유전자의 단백질 또는 펩타이드 단편에 특이적으로 결합하는 항체, 상호작용 단백질, 리간드, 나노입자 (nanoparticles) 또는 압타머(aptamer)를 이용하여 단백질의 양을 확인할 수 있다.As used herein, the term "measurement of protein expression level" is a process of confirming the presence and level of expression of a protein expressed from a biomarker for diagnosing chronic liver disease in a biological sample. The amount of the protein can be confirmed using an antibody, an interacting protein, a ligand, nanoparticles, or an aptamer that specifically binds to a protein or peptide fragment of the gene.
상기 단백질 발현 수준 측정 또는 비교 분석 방법으로는 단백질 칩 분석, 면역측정법, 리간드 바인딩 어세이, MALDI-TOF(Matrix Desorption/Ionization Time of Flight Mass Spectrometry)분석, SELDI-TOF(Sulface Enhanced Laser Desorption/Ionization Time of Flight Mass Spectrometry)분석, 방사선 면역분석, 방사 면역 확산법, 오우크테로니 면역 확산법, 로케트 면역전기영동, 조직면역 염색, 보체 고정 분석법, 2차원 전기영동 분석, 액상 크로마토그래피-질량분석(liquid chromatography-Mass Spectrometry, LC-MS), LC-MS/MS(liquid chromatography-Mass Spectrometry/ Mass Spectrometry), 웨스턴 블랏 및 ELISA(enzyme linked immunosorbent assay)등이 있으나 이로 제한되는 것은 아니다. The protein expression level measurement or comparative analysis method includes protein chip analysis, immunoassay, ligand binding assay, MALDI-TOF (Matrix Desorption/Ionization Time of Flight Mass Spectrometry) analysis, SELDI-TOF (Sulface Enhanced Laser Desorption/Ionization Time) analysis. of Flight Mass Spectrometry analysis, radioimmunoassay, radioimmunodiffusion method, Ouchteroni immunodiffusion method, rocket immunoelectrophoresis, tissue immunostaining, complement fixation assay, 2D electrophoresis analysis, liquid chromatography-mass spectrometry (liquid chromatography) -Mass Spectrometry, LC-MS), LC-MS/MS (liquid chromatography-Mass Spectrometry/ Mass Spectrometry), Western blot, and ELISA (enzyme linked immunosorbent assay), but are not limited thereto.
본 발명에 사용된 용어 "항체"는 항원과 특이적으로 결합하여 항원-항체 반응을 일으키는 물질을 가리킨다. 본 발명의 목적상, 항체는 본 발명의 바이오마커에 대해 특이적으로 결합하는 항체를 의미한다. 본 발명의 항체는 다클론 항체, 단클론 항체 및 재조합 항체를 모두 포함한다.As used herein, the term "antibody" refers to a substance that specifically binds to an antigen and causes an antigen-antibody reaction. For the purposes of the present invention, an antibody refers to an antibody that specifically binds to a biomarker of the present invention. Antibodies of the present invention include polyclonal antibodies, monoclonal antibodies and recombinant antibodies.
본 발명은 상기 비알콜성 지방간염 진단용 바이오 마커 조성물을 포함하는 비알콜성 지방간염 진단용 키트에 관한 것이다. The present invention relates to a kit for diagnosing nonalcoholic steatohepatitis comprising the biomarker composition for diagnosing nonalcoholic steatohepatitis.
상기 키트는 당업계에 알려져 있는 통상의 제조방법에 의해 제조될 수 있다. 상기 키트는 예를 들면, 동결 건조 형태의 항체와 완충액, 안정화제, 불활성 단백질 등을 포함할 수 있다. The kit may be prepared by a conventional manufacturing method known in the art. The kit may include, for example, a freeze-dried antibody, a buffer, a stabilizer, an inactive protein, and the like.
상기 키트는 검출 가능한 표지를 더 포함할 수 있다. 용어 "검출 가능한 표지"는 표지가 없는 동일한 종류의 분자들 중에서 표지를 포함하는 분자를 특이적으로 검출하도록 하는 원자 또는 분자를 의미한다. 상기 검출 가능한 표지는 상기 단백질 또는 그의 단편에 특이적으로 결합하는 항체, 상호작용 단백질, 리간드, 나노입자, 또는 압타머에 부착된 것일 수 있다. 상기 검출 가능한 표지는 방사종(radionuclide), 형광원(fluorophore), 효소(enzyme)를 포함할 수 있다. The kit may further include a detectable label. The term “detectable label” refers to an atom or molecule that allows for specific detection of a molecule comprising a label among molecules of the same type without a label. The detectable label may be attached to an antibody that specifically binds to the protein or fragment thereof, an interacting protein, a ligand, a nanoparticle, or an aptamer. The detectable label may include a radioactive species (radionuclide), a fluorophore (fluorophore), and an enzyme (enzyme).
상기 키트는 당업계에 알려진 다양한 면역분석법 또는 면역염색법에 따라 이용될 수 있다. 상기 면역분석법 또는 면역염색법은 방사능면역분석, 방사능면역침전, 면역침전, ELISA, 캡처-ELISA, 억제 또는 경쟁 분석, 샌드위치 분석, 유세포 분석, 면역형광염색 및 면역친화성 정제를 포함할 수 있다. 바람직하게, 상기 키트는 RT-PCR(reverse transcription polymerase chain reaction) 키트, DNA 칩 키트, ELISA(enzyme linked immunosorbent assay) 키트, 단백질 칩 키트, 래피드(rapid) 키트 또는 MRM(multiple reaction monitoring)인 것일 수 있다. The kit may be used according to various immunoassays or immunostaining methods known in the art. The immunoassay or immunostaining method may include radioimmunoassay, radioimmunoprecipitation, immunoprecipitation, ELISA, capture-ELISA, inhibition or competition assay, sandwich assay, flow cytometry, immunofluorescence staining and immunoaffinity purification. Preferably, the kit may be a reverse transcription polymerase chain reaction (RT-PCR) kit, a DNA chip kit, an ELISA (enzyme linked immunosorbent assay) kit, a protein chip kit, a rapid kit or MRM (multiple reaction monitoring). have.
본 발명은 또 다른 관점에서, (a) 환자의 생물학적 시료로부터 EWSR1의 mRNA 또는 단백질 수준을 측정하는 단계; 및 In another aspect, the present invention, (a) measuring the mRNA or protein level of EWSR1 from a patient's biological sample; and
(b) 상기 mRNA 또는 단백질 발현 수준을 대조군 시료와 비교하는 단계를 포함하는 만성간질환 진단에 대한 정보 제공방법에 관한 것이다.(b) relates to a method for providing information on the diagnosis of chronic liver disease, comprising the step of comparing the mRNA or protein expression level with a control sample.
상기 방법에서 "생물학적 시료(biological sample)"란 조직, 세포, 혈액, 혈청, 혈장, 타액, 뇌척수액 또는 뇨와 같은 시료 등을 의미하며, 바람직하게는 혈액, 혈장, 혈청, 간 조직을 의미한다.In the above method, "biological sample" means a sample such as tissue, cells, blood, serum, plasma, saliva, cerebrospinal fluid or urine, and preferably means blood, plasma, serum, or liver tissue.
상기 만성간질환 진단에 대한 정보 제공방법에서 EWSR1 유전자의 mRNA 또는 이의 단백질의 발현 수준 측정 방법은 상술한 바와 같다.In the method for providing information on the diagnosis of chronic liver disease, the method for measuring the expression level of EWSR1 gene mRNA or protein thereof is as described above.
상기 만성간질환 진단에 대한 정보 제공방법은 상기 만성간질환 진단에 대한 정보 제공방법은 EWSR1 유전자의 mRNA의 발현 정도가 대조군에 비해 증가하면 비알콜성 지방간염인 것으로 정보를 제공하는 단계를 추가로 포함할 수 있다.In the method for providing information on the diagnosis of chronic liver disease, the method for providing information on the diagnosis of chronic liver disease further comprises the step of providing information as non-alcoholic steatohepatitis when the mRNA expression level of the EWSR1 gene increases compared to the control group. may include
상기 만성간질환 진단에 대한 정보 제공방법은 환자의 생물학적 시료가 간 조직일 경우 EWSR1 단백질의 발현 정도가 대조군에 비해 감소하면 비알콜성 지방간염인 것으로 정보를 제공하는 단계를 추가로 포함할 수 있다. The information providing method for the diagnosis of chronic liver disease may further include providing information as non-alcoholic steatohepatitis when the expression level of EWSR1 protein is reduced compared to the control when the biological sample of the patient is liver tissue. .
기 만성간질환 진단에 대한 정보 제공방법은 환자의 생물학적 시료가 혈청일 경우 EWSR1 단백질의 발현 정도가 대조군에 비해 증가하면 비알콜성 지방간염인 것으로 정보를 제공하는 단계를 추가로 포함할 수 있다. The information providing method for the diagnosis of chronic liver disease may further include providing information as non-alcoholic steatohepatitis when the expression level of EWSR1 protein increases compared to the control when the patient's biological sample is serum.
또한 본 발명은 a) 동물의 간에서 EWSR1 유전자의 mRNA 발현 수준 또는 EWSR1 단백질의 발현 수준을 측정하는 단계; (b) 상기 동물에 시험 물질을 처리하는 단계; (c) 상기 시험물질을 처리한 동물의 간에서 EWSR1 유전자의 mRNA 발현 수준 또는 EWSR1 단백질의 발현 수준을 측정하는 단계; 및 (d) 상기 단계 (a)에서 측정한 EWSR1 유전자의 mRNA 발현 수준 또는 EWSR1 단백질의 발현 수준과 비교하여, 상기 단계 (c)에서 측정한 EWSR1 유전자의 mRNA 발현 수준이 낮아지거나 EWSR1 단백질의 발현 수준이 증가한 물질을 선별하는 단계를 포함하는 것을 특징으로 하는 비알콜성 지방간염 치료제의 스크리닝 방법을 제공한다.In addition, the present invention comprises the steps of: a) measuring the mRNA expression level of the EWSR1 gene or the expression level of the EWSR1 protein in the liver of an animal; (b) treating the animal with a test substance; (c) measuring the mRNA expression level of the EWSR1 gene or the expression level of the EWSR1 protein in the liver of the animal treated with the test substance; And (d) compared with the mRNA expression level of the EWSR1 gene or the expression level of the EWSR1 protein measured in step (a), the mRNA expression level of the EWSR1 gene measured in step (c) is lowered or the expression level of the EWSR1 protein It provides a screening method for a therapeutic agent for nonalcoholic steatohepatitis, comprising the step of selecting the increased substance.
이하, 실시예를 통하여 본 발명을 더욱 상세히 설명하고자 한다. 이들 실시예는 오로지 본 발명을 예시하기 위한 것으로서, 본 발명의 범위가 이들 실시예에 의해 제한되는 것으로 해석되지 않는 것은 당업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.Hereinafter, the present invention will be described in more detail through examples. These examples are only for illustrating the present invention, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not to be construed as being limited by these examples.
[실시예 1] 재료 및 방법[Example 1] Materials and methods
1-1 세포 배양1-1 Cell Culture
사람 간암세포주(Human hepatoma cell line)인 Huh7과 마우스 정상간세포주(Mouse hepatocyte)인 FL83B는 from American Type Culture Collection (ATCC, VA, USA)에서 구매하였다. Huh7은 Dulbecco's Modified Eagle's medium (DMEM,Hyclone, UT, USA) 배지에, FL83B는 F-12K(Kaighn's Modification of Ham's F-12 Medium, Gibco, MA, USA) 배지에 각각 항생제(100μg/ml 페니실린 및 0.25μg/ml 스트렙토마이신)와 10% FBS(Fetal bovine medium,(Invitrogen, MA, USA)를 첨가하여 배양하였다. 세포는 일정한 습도를 유지하는 37℃ 항온기에서 배양하고 3~4일마다 계대배양하였다. Huh7과 FL83B에 EWSR1 과발현 벡터(pFlag-EWSR1, provided by Dr.Sean Bong Lee, Tulane University School of Medicine, New Orleans, LA 70112, USA)를 lipofectamine 방법으로 세포내로 도입하였다. 과발현시킨 후 대조군으로 Bovine Serum Albumin (BSA)과 실험군으로 palmitic acid를 처리하여 비알콜성 지방간질환 in vitro 모델을 확립하였다.Huh7, a human hepatoma cell line, and FL83B, a mouse hepatocyte, were purchased from American Type Culture Collection (ATCC, VA, USA). Huh7 is in Dulbecco's Modified Eagle's medium (DMEM, Hyclone, UT, USA) medium, FL83B is F-12K (Kaighn's Modification of Ham's F-12 Medium, Gibco, MA, USA) medium in antibiotics (100 μg/ml penicillin and 0.25 μg/ml streptomycin) and 10% FBS (Fetal bovine medium, (Invitrogen, MA, USA) were added and cultured. Cells were cultured in a 37°C incubator maintaining constant humidity and subcultured every 3 to 4 days. EWSR1 overexpression vector (pFlag-EWSR1, provided by Dr.Sean Bong Lee, Tulane University School of Medicine, New Orleans, LA 70112, USA) was introduced into cells by lipofectamine method in Huh7 and FL83B. After overexpression, Bovine Serum as a control An in vitro model of nonalcoholic fatty liver disease was established by treatment with albumin (BSA) and palmitic acid as the experimental group.
1-2 Nile red 염색1-2 Nile red staining
세포에서의 지방축적을 알아보기 위해 Huh7과 FL83B에 BSA와 Palmitic acid (PA)를 각각 24시간 처리 후 PBS로 media를 씻어주었다. 그 후 4% 파라포름알데하이드에 3분 고정하였고 이를 다시 PBS로 씻어주었다. Nile red (sigma)로 5분 동안 염색한 후 PBS로 씻어주고 형광현미경으로 관찰하였다.In order to examine the fat accumulation in the cells, Huh7 and FL83B were treated with BSA and Palmitic acid (PA) for 24 hours, respectively, and then the media was washed with PBS. After that, it was fixed in 4% paraformaldehyde for 3 minutes and washed again with PBS. After staining with Nile red (sigma) for 5 minutes, it was washed with PBS and observed with a fluorescence microscope.
1-3 Total RNA추출1-3 Total RNA extraction
동결 보관되어 있던 세포나 간조직을 trizol reagent (Invitrogen, Carlsbad, CA, USA) 1 ㎖을 넣고 혼합하여 상온에서 5분간 방치하였다. 여기에 0.2 ㎖의 클로로폼(chloroform)을 첨가하여 잘 섞은 다음 상온에서 2-3분간 방치한 후, 4℃, 12,000 g에서 15분간 원심 분리하여 얻은 무색의 상층액을 새로운 튜브(tube)로 옮겼다. 이 상층액에 0.5㎖의 아이소프로판올(isopropanol)을 혼합하고 실온에서 10분간 방치한 다음 4℃, 12,000 g에서 10분간 원심 분리하여 RNA를 침전시키고 상층을 제거하였다. 침전된 RNA에 75% 에탄올 1㎖을 잘 혼합한 후 4℃, 12 000 g에서 10분간 원심 분리하여 상층을 제거 하고 실온에서 10분간 건조시켰다. 건조된 RNA에 100 ㎕의 증류수를 첨가하여 녹인 후, 그 중 1㎕를 취하여 분광기(spectrometer)로 흡광도를 측정하고, 1% 아가로스 겔(agarose gel)에서 전기영동을 수행하여 RNA의 순도를 확인하였다. Cells or liver tissue stored frozen were mixed with 1 ml of trizol reagent (Invitrogen, Carlsbad, CA, USA), and left at room temperature for 5 minutes. 0.2 ml of chloroform was added thereto, mixed well, left at room temperature for 2-3 minutes, and then centrifuged at 4° C. for 15 minutes at 12,000 g. The colorless supernatant obtained was transferred to a new tube. . 0.5 ml of isopropanol was mixed with this supernatant, left at room temperature for 10 minutes, and then centrifuged at 4° C. and 12,000 g for 10 minutes to precipitate RNA and remove the supernatant. After mixing 1 ml of 75% ethanol with the precipitated RNA, centrifugation was performed at 4 ℃, 12 000 g for 10 minutes to remove the upper layer and dried at room temperature for 10 minutes. After dissolving the dried RNA by adding 100 μl of distilled water, taking 1 μl of it, measuring the absorbance with a spectrometer, and performing electrophoresis on a 1% agarose gel to confirm the purity of the RNA did.
1-4 실시간 중합효소연쇄반응 (Real-time PCR)1-4 Real-time PCR
TRIzol(Ambion)을 사용하여 RNA를 추출한 후 reverse transcriptase(Promega)를 이용하여 cDNA를 합성하였다. 이를 SYBR Green I(Takara)과 함께 EWSR1 primer와 반응시켜 실시간 중합효소연쇄반응을 통해 EWSR1의 발현을 분석하였다. EWSR1 primer의 염기서열은 다음과 같다. EWSR1 Forward primer 5‘ -GTGCAATTTATGTGCAAGGATTA- 3’ & EWSR1 Reverse primer 5‘ - TCCAGTTCTCTTGTTCATCTTGA- 3’ 상기 유전자의 발현에 보정을 위한 대조군으로서, β-액틴의 유전자의 발현을 상기와 동일한 방법을 수행하여 확인하고, 이를 기준으로 보정 한 다음, EWSR1 유전자의 발현 수준을 정량적으로 비교하였다. After RNA was extracted using TRIzol (Ambion), cDNA was synthesized using reverse transcriptase (Promega). This was reacted with EWSR1 primer together with SYBR Green I (Takara) to analyze the expression of EWSR1 through real-time polymerase chain reaction. The base sequence of the EWSR1 primer is as follows. EWSR1 Forward primer 5' -GTGCAATTTATGTGCAAGGATTA- 3' & EWSR1 Reverse primer 5' -TCCAGTCTCTTGTTCATCTTGA-3' As a control for correcting the expression of the gene, the expression of the β-actin gene was confirmed by performing the same method as above, After correction based on this, the expression level of the EWSR1 gene was quantitatively compared.
1-5 웨스턴 블롯 (Western blot) 분석1-5 Western blot analysis
Huh7과 FL83B에 RIPA 완충액(20 mM Tris-HCl at pH 7.5, 150 mM NaCl, 1 % Triton X-100, 1 % sodium deoxycholate, and 0.1 % SDS), protease inhibitor (Roche, Basel, Swiss), phosphatase inhibitor cocktail (Sigma, MO, USA))를 처리하여 단백질을 추출하였다. 각각의 단백질을 RIPA 완충액과 섞어 5분 끓인 후 상온에서 식혔다. SDS(Sodium dodecyl sulfate) 폴리아크릴아미드 겔에서 전기영동하여 단백질을 크기별로 분리한 후, Nitrocellulose membrane(GE Healthcare, WI, USA)으로 이동시켰다. 차단 완충액(Blocking buffer)으로 1시간 차단하고 EWSR1과 Actin 항체로 4℃에서 18시간 반응시킨 후, horseradish peroxidase(HRP)가 표지된 이차항체로 2시간 반응시켰다. ECL 완충액(GE Healthcare)을 사용하여 단백질의 발현을 확인하였다. RIPA buffer (20 mM Tris-HCl at pH 7.5, 150 mM NaCl, 1 % Triton X-100, 1 % sodium deoxycholate, and 0.1 % SDS), protease inhibitor (Roche, Basel, Swiss), phosphatase inhibitor in Huh7 and FL83B cocktail (Sigma, MO, USA)) to extract the protein. Each protein was mixed with RIPA buffer, boiled for 5 minutes, and then cooled at room temperature. Proteins were separated by size by electrophoresis on sodium dodecyl sulfate (SDS) polyacrylamide gel, and then transferred to a Nitrocellulose membrane (GE Healthcare, WI, USA). Blocked with blocking buffer for 1 hour, reacted with EWSR1 and Actin antibody at 4°C for 18 hours, and then reacted with horseradish peroxidase (HRP)-labeled secondary antibody for 2 hours. Expression of the protein was confirmed using ECL buffer (GE Healthcare).
1-6 동물 실험1-6 Animal Experiments
실험동물로는 약 6주령이 된 C57BL/6 종 마우스를 구입하여 실험을 진행하였다. 실험은 두 가지 방식으로 진행되었는데 우선 정상대조군, 고지방식이군으로 나눠 9개월 동안 식이를 진행하고 간을 분리하여 EWSR1의 발현을 웨스턴 블롯과 면역조직화학염색으로 확인하였다. 다음으로 정상 대조군, 고지방식이군, 고지방식이에 EWSR1 과발현군, 이렇게 3군으로 나누어 식이를 4주 동안 진행하며 EWSR1 과발현 실험군은 4일에 한 번 꼬리 정맥으로 EWSR1 발현벡터를 PBS와 함께 주입하였다. 이들도 간을 분리하여 간 내에서 지방이 축적되어 만들어지는 분자 중 하나인 triglyceride (TG)를 측정하였고, VetTest 8008(IDEXX)을 사용하여 혈액내의 효소 활성 alanine Aminotransferase(ALT))이나 TG, Cholesterol을 측정하였다. As experimental animals, C57BL/6 mice, which are about 6 weeks old, were purchased and the experiment was carried out. The experiment was conducted in two ways. First, the diet was divided into a normal control group and a high-fat diet group for 9 months, and the liver was isolated and the expression of EWSR1 was confirmed by Western blot and immunohistochemical staining. Next, the normal control group, the high-fat diet group, and the high-fat diet EWSR1 overexpression group were divided into 3 groups and the diet was carried out for 4 weeks. . They also separated the liver and measured triglyceride (TG), one of the molecules produced by the accumulation of fat in the liver. Using VetTest 8008 (IDEXX), enzyme activity alanine aminotransferase (ALT)) measured.
1-7 H&E 염색과 면역조직화학염색, Oil red O 염색1-7 H&E staining, immunohistochemical staining, Oil red O staining
간 조직의 형태를 확인하기 위해 H&E 염색법을 사용하였고 박절한 조직에 Harry’s hematoxylin 염색액으로 1분간 염색한 후 흐르는 물에 수세하였다. 이후 eosin염색액으로 1분간 대조염색을 하고 함수(100%- 95%- 90%- 80%- 70% EtOH)의 역방향으로 탈수과정을 거친 후 봉입하여 현미경으로 관찰하였다. 조직 내의 EWSR1의 발현을 확인하기 위해 사용한 면역조직화학염색법은 박절한 조직에 EWSR1 항체로 4℃에서 18시간 반응시킨 후 세척하여 Dako envision Plus 시스템 (Dako)으로 상온에서 30분 조절하고, 디아미노벤지딘으로 상온에서 1분 30초 동안 면역 반응을 수행한 후 hematoxylin 염색액으로 1분간 염색하였다. 그 후 함수(100%- 95%- 90%- 80%- 70% EtOH)의 역방향으로 탈수과정을 거친 후 봉입하여 현미경으로 관찰하였다. 간 조직 내의 지방 축적의 정도를 확인하기 위해 Oil red O 염색법을 사용하였는데 박절한 조직을 이소프로판올에 녹인 oil red o 시약을 15분 염색한 후 hematoxylin 염색액으로 1분간 염색하였다. 그 후 물로 수세 후 봉입하여 현미경으로 관찰하였다.H&E staining was used to confirm the morphology of the liver tissue, and the sliced tissue was stained with Harry's hematoxylin staining solution for 1 minute and then washed with running water. Then, counterstaining was performed for 1 minute with eosin staining solution, dehydrated in the reverse direction of water (100%-95%-90%-80%-70% EtOH), and then sealed and observed under a microscope. The immunohistochemical staining method used to confirm the expression of EWSR1 in the tissue was reacted with EWSR1 antibody at 4° C. for 18 hours, washed, and adjusted for 30 minutes at room temperature with the Dako envision Plus system (Dako), followed by diaminobenzidine After performing an immune response at room temperature for 1 minute and 30 seconds, the cells were stained with hematoxylin staining solution for 1 minute. Then, after dehydration in the reverse direction of water (100%- 95%- 90%- 80%- 70% EtOH), it was sealed and observed under a microscope. Oil red O staining method was used to check the degree of fat accumulation in liver tissue. The sliced tissue was stained with oil red o reagent dissolved in isopropanol for 15 minutes and then stained with hematoxylin staining solution for 1 minute. After washing with water, it was sealed and observed under a microscope.
[실시예 2] 지방의 축적에 따른 EWSR1의 발현을 in vitro 실험에서 확인[Example 2] EWSR1 expression according to fat accumulation was confirmed in an in vitro experiment
간 세포주인 FL83B에 우리 몸을 이루는 지방산 중 하나인 Palmitic acid(PA)를 24시간 처리하여 비알코올성 지방 간 in vitro 모델로 재현하였고, 이에 따라 EWSR1 발현과 세포 내 위치를 real-time PCR, Western blot(WB)과 immunofluorescence staining을 통해 확인하였다. 그 결과, 간세포에 PA 처리로 EWSR1의 mRNA 발현은 유의적으로 증가하지만 (P < 0.001) protein에서의 발현은 감소하는 것을 확인하였다. 또한, 간세포에 PA를 처리하였을 때 지방이 축적되는 것을 Nile-Red staining 후 형광현미경을 통해 확인하였고 이에 따라 EWSR1의 발현이 정상 간세포에서는 주로 핵에서 발현되는 반면, PA를 처리하였을 때 핵에서 세포질로 발현 위치가 바뀜을 확인하였다 (도 1).The liver cell line, FL83B, was treated with palmitic acid (PA), one of the fatty acids in our body, for 24 hours and reproduced in an in vitro model of non-alcoholic fatty liver. (WB) and confirmed by immunofluorescence staining. As a result, it was confirmed that the expression of EWSR1 mRNA significantly increased (P < 0.001) but decreased in protein by PA treatment in hepatocytes. In addition, when PA was treated in hepatocytes, fat accumulation was confirmed through fluorescence microscopy after Nile-Red staining. Accordingly, EWSR1 expression was mainly expressed in the nucleus in normal hepatocytes, whereas when PA was treated, the expression of EWSR1 moved from the nucleus to the cytoplasm. It was confirmed that the expression position was changed (FIG. 1).
[실시예 3] 비알콜성 지방 간질환 마우스 모델에서 EWSR1의 발현 확인[Example 3] Confirmation of expression of EWSR1 in non-alcoholic fatty liver disease mouse model
고지방 식이를 이용해 유도된 비알코올성 지방간 마우스의 간 조직에서 EWSR1의 발현을 웨스턴 블롯과 면역조직화학 분석 (Immunohistochemistry analysis)을 통해 확인하였다. 그 결과, 정상 간 조직과 비교하여 비알콜성 지방 간질환이 진행될수록 EWSR1의 protein 발현이 감소한다는 것을 확인하였고 (P = 0.0015) 면역조직화학분석을 통한 EWSR1의 발현도 비알코올성 지방간 마우스의 간 조직에서 감소한 것을 확인하였다 (도 2). The expression of EWSR1 in the liver tissue of non-alcoholic fatty liver mice induced using a high-fat diet was confirmed by Western blot and immunohistochemistry analysis. As a result, it was confirmed that the protein expression of EWSR1 decreased as the nonalcoholic fatty liver disease progressed (P = 0.0015) compared to normal liver tissue. It was confirmed that the decrease in (Fig. 2).
[실시예 4] 지방 간질환 환자의 샘플에서 EWSR1 발현 확인[Example 4] Confirmation of EWSR1 expression in samples of fatty liver disease patients
임상적으로 비알콜성 지방간 진단 마커로서의 유용성을 확인하고자 단순 지방간(Fatty liver)과 비알콜성 지방 간염 환자(Non-alcoholic steatohepatitis, NASH)의 간 조직과 혈청을 이용해 EWSR1의 발현을 각각 면역조직화학 분석과 ELISA분석을 통해 확인하였다 (도 3). 그 결과, 단순 지방간과 비알콜성 지방 간염 환자의 간 조직 내 EWSR1의 발현은 감소하였고 혈청 내 발현이 증가함을 확인하였다. 이러한 결과로 EWSR1 단백이 비알콜성 지방 간질환의 진단 마커로서의 가능성을 확인하였다. To confirm clinical utility as a diagnostic marker for nonalcoholic fatty liver, the expression of EWSR1 was analyzed by immunohistochemical It was confirmed through analysis and ELISA analysis (FIG. 3). As a result, it was confirmed that the expression of EWSR1 in the liver tissue of patients with simple fatty liver and nonalcoholic steatohepatitis was decreased and the expression in serum was increased. As a result, the potential of EWSR1 protein as a diagnostic marker for nonalcoholic fatty liver disease was confirmed.
[실시예 5] 간 세포주에 pFlag-EWSR1 발현 벡터를 세포 내 주입 시킨 후, PA 처리에 따른 지방축적 정도와 신호전달 기전 확인[Example 5] After intracellular injection of the pFlag-EWSR1 expression vector into the liver cell line, the degree of fat accumulation and the signaling mechanism according to PA treatment were confirmed
비알콜성 지방 간질환이 진행될 때 감소했던 EWSR1의 발현을 다시 과발현시켰을 때 세포 내 지방축적 정도와 관련 신호전달 기전을 확인하였다. 간세포에 pFlag-EWSR1 발현 벡터를 세포 내 transfection 시켜 과발현시킨 후, PA를 처리하여 지방이 축적되는 정도를 Nile-Red staining과 Fluorescence-activated cell sorting (FACS) 분석을 통해 비교 분석하였다. 그리고 이와 연관이 있을 것으로 보이는 신호전달기전을 WB을 통해 확인하였다. 그 결과, PA 처리에 따라 유도되는 세포 내 지방축적은 EWSR1의 과발현에 따라 억제되어 짐을 확인하였다 (P = 0.0444). 또한, 이때 세포 내 변화가 있는 신호전달 기전을 확인한 결과, EWSR1 발현은 세포 내의 에너지 항상성 유지에 센서 역할을 하는 효소인 AMPK의 활성을 조절함을 확인하였다. 이에 따라 EWSR1이 AMPK의 활성화를 촉진하고 그로 인해 지방산의 합성을 억제하고 지방산의 산화를 촉진하는 ACC(acetyl CoA carboxylase)와 CPT1a의 발현을 증가시킴으로써 세포 내 지방축적을 감소시킨다는 사실을 확인하였다 (도 4). When the expression of EWSR1, which was decreased during the progression of nonalcoholic fatty liver disease, was overexpressed again, the degree of intracellular fat accumulation and related signaling mechanisms were confirmed. After intracellular transfection of the pFlag-EWSR1 expression vector into hepatocytes and overexpression, the degree of fat accumulation by treatment with PA was compared and analyzed through Nile-Red staining and Fluorescence-activated cell sorting (FACS) analysis. And the signaling mechanism that seems to be related to this was confirmed through WB. As a result, it was confirmed that the intracellular fat accumulation induced by PA treatment was inhibited by overexpression of EWSR1 (P = 0.0444). In addition, as a result of confirming the signaling mechanism with intracellular changes at this time, it was confirmed that EWSR1 expression regulates the activity of AMPK, an enzyme that serves as a sensor in maintaining energy homeostasis in cells. Accordingly, it was confirmed that EWSR1 reduced intracellular fat accumulation by promoting the activation of AMPK and thereby inhibiting fatty acid synthesis and increasing the expression of ACC (acetyl CoA carboxylase) and CPT1a, which promote fatty acid oxidation (Fig. 4).
[실시예 6] 고지방 식이로 유도된 비알콜성 지방간 마우스 모델에 EWSR1 유전자를 처리한 뒤 마우스의 몸무게 및 간 조직 내 지방의 축적 확인[Example 6] After treatment with the EWSR1 gene in a non-alcoholic fatty liver mouse model induced by a high-fat diet, the weight of the mouse and the accumulation of fat in the liver tissue
in vivo 실험을 통해 고지방 식이로 유도된 비알콜성 지방간 마우스 모델에 EWSR1 유전자를 쥐에 주입(Hydrodynamic gene delivery)하여 EWSR1을 과발현시킨 후 마우스의 지방간질환의 변화를 관찰하였다. 그 결과, EWSR1을 과발현시킨 그룹에서 몸무게와 간의 무게가 감소한 것을 확인하였다. 또한, TG가 EWSR1을 과발현시킨 그룹에서 감소하는 것을 확인하였다. 이러한 결과로 EWSR1 단백이 비알콜성 지방 간질환의 치료와 예방에 대한 가능성을 가지고 있음을 확인하였다 (도 5).Through an in vivo experiment, the EWSR1 gene was injected (hydrodynamic gene delivery) into a mouse model of nonalcoholic fatty liver induced by a high-fat diet to overexpress EWSR1, and then, changes in fatty liver disease in mice were observed. As a result, it was confirmed that body weight and liver weight decreased in the group overexpressing EWSR1. In addition, it was confirmed that TG decreased in the group overexpressing EWSR1. As a result, it was confirmed that the EWSR1 protein has the potential for treatment and prevention of non-alcoholic fatty liver disease (FIG. 5).
Claims (10)
(b) 상기 mRNA 또는 단백질 발현 수준을 대조군 시료와 비교하는 단계를 포함하는, 비알콜성 지방간염 진단을 위한 정보를 제공하는 방법.(a) measuring the mRNA or protein expression level of the EWSR1 gene from the patient's biological sample; and
(b) a method of providing information for diagnosing nonalcoholic steatohepatitis, comprising the step of comparing the mRNA or protein expression level with a control sample.
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