JP2007332122A - Anti-nc1 monoclonal antibody reactive peptide - Google Patents

Anti-nc1 monoclonal antibody reactive peptide Download PDF

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JP2007332122A
JP2007332122A JP2006188600A JP2006188600A JP2007332122A JP 2007332122 A JP2007332122 A JP 2007332122A JP 2006188600 A JP2006188600 A JP 2006188600A JP 2006188600 A JP2006188600 A JP 2006188600A JP 2007332122 A JP2007332122 A JP 2007332122A
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antibody
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Morisuke Yokoyama
司甫 横山
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<P>PROBLEM TO BE SOLVED: To provide a peptide having an immune reactivity with an anti-NC1 monoclonal antibody, and/or a chronic kidney inflammation detective reagent using the antibody, and a kidney disease therapeutic agent. <P>SOLUTION: This reagent detects kidney inflammation at an early stage by discovering a peptide and/or a substance having immune reactivity to the antibody from a live body sample such as blood serum and urine of kidney inflammation, using a peptide having an immune reactivity with an anti-NC1 monoclonal antibody, and/or its antibody. This medicine comprises a peptide having an immune reactivity with an anti-NC1 monoclonal antibody, and/or its antibody. A method to screen an antibody and/or a peptide which has immune reactivity with the peptide and/or its antibody using a peptide having an immune reactivity with an anti-NC1 monoclonal antibody and/or its antibody, is also patented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

発明の詳細な説明Detailed Description of the Invention

産業上の利用分野Industrial application fields

本発明は、抗NC1モノクロ−ナル抗体の利用に関するもので、特には免疫組織染色に用いる時、障害腎を染色し、健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体に関するものである。抗NC1モノクローナル抗体は、それ自身が免疫反応性を持つNC1様物質の検出に有用であるし、尿から検出する事で、腎疾患診断薬に利用できる。
又、免疫組織染色に用いる時、障害腎を染色し健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体は、ジン疾患治療剤の標的物質として利用できる。更に、免疫組織染色に用いる時、障害腎を染色し健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体を用いれば、公知のNC1のアミノ酸配列から、特に免疫反応性の強い領域(ペプチド)を見出だす事で抗原決定基を確定できる。この確定された領域(ペプチド)は、以降、抗NC1モノクローナル抗体と免疫反応性を有するペプチド及び又はその抗体と共に、腎疾患モデルの惹起物質として、ワクチン、免疫寛容剤(免疫調整剤と同義に使用)あるいは腎疾患治療剤などの薬剤(以下薬剤)として、又、薬剤開発の標的物質として薬剤候補のスクリーニングに、あるいは早期の腎炎検出のリガンドとして用いられる。
The present invention relates to the use of an anti-NC1 monoclonal antibody, and particularly to an anti-NC1 monoclonal antibody characterized by staining a damaged kidney and not a healthy kidney when used for immunohistochemical staining. The anti-NC1 monoclonal antibody is useful for detecting an NC1-like substance that itself has immunoreactivity, and can be used as a diagnostic agent for renal diseases by detecting it from urine.
Further, when used for immunohistochemical staining, an anti-NC1 monoclonal antibody characterized by staining a damaged kidney but not a healthy kidney can be used as a target substance for a gin disease therapeutic agent. Furthermore, when using an anti-NC1 monoclonal antibody characterized by staining a damaged kidney but not a healthy kidney when used for immunohistochemical staining, a region (peptide) having a particularly strong immunoreactivity from the known amino acid sequence of NC1. The antigenic determinant can be determined by finding This established region (peptide) is used hereinafter as a vaccine, immunotolerant (synonymous with immunomodulator) as an inducer of a renal disease model, together with a peptide immunoreactive with an anti-NC1 monoclonal antibody and / or its antibody. ) Or a drug for treating renal diseases (hereinafter referred to as a drug), as a target substance for drug development, for screening drug candidates, or as a ligand for early nephritis detection.

腎炎の抗原の存在あるいは示唆は古今東西、多数の論文があるし、提唱された抗原例も多数あるが、唯一の例を除き、今だ確定されたものはない。それにも関わらず、抗原の探索が続くのは、腎炎が免疫反応に基づいて起こる、もしくは進行原因と考えられているからである。
実際、専門誌「腎と透析」では「注目される腎関連蛋白」として巻頭に抗原例を毎号連載をしているほどである(腎と透析2005 July Vol59 No.1東京医学社)。抗原が決定されている唯一の例は、稀な腎炎である「抗糸球体基底膜(GBM)抗体腎炎」である。抗GBM抗体腎炎は急速に悪化する「急性腎炎」である。
しかし、通常、腎炎と呼ばれるものの大多数は、10年以上の単位でゆっくり進行する。その中には、糖尿病や高血圧を原因疾患とした二次性腎炎もあるが、いずれも、腎炎の悪化を促進する抗原は確定していない。
ここで、本発明のご理解を頂くためにタイプ4コラーゲンの概要を述べる。
タイプ4コラーゲンは全て解明されているわけではない。タイプ4コラーゲンは多数の分子が結合し、そこに多種類の成分が係わる事で組織基底膜は形成する。又、タイプ4コラーゲンは組織基底膜の中心成分であることから基底膜コラーゲンとも呼ばれる。
タイプ4コラーゲンはアルファ鎖6種が知られ、1分子は3種のアルファ鎖から構成される。又、基底膜を構成するタイプ4コラーゲンは組織により3種のアルファ鎖の構成が異なる。胎盤由来の基底膜ではアルファ1、アルファ2に富み、全身の各組織基底膜に共通に見られる。腎由来の基底膜は特異で、アルファ3からアルファ6鎖に富むとされ、腎臓の糸球体、ボウマン嚢、尿細管の基底膜には共通したアルファ鎖が示唆されている。
タイプ4コラーゲン1分子は三領域に分けられ、N末端から三本鎖らせん構造を持つ7Sと中央螺旋部(TH)、C末端領域で非らせん構造のNC1である。
生体組織から取り出す時、処理方法により得られる領域は異なり、ペプシン処理で三本鎖らせん領域が、細菌由来コラゲナーゼ処理でNC1が得るのが一般的手法である(Extracelluar Matrix IRL PRESS/ OXFORD UNIVERSITY PRESS Oxford New York)。
一方、腎炎は、毎年3万人が新規透析導入例となり、本人の生活の質(QL)にとっても、国民医療費(透析1例に付き、600万円/年)の上でも多大な負担である。透析の技術は進歩しているが、それ以前のごく初期に腎障害を特定したり、直接腎炎を治療する薬剤はない。その理由は、腎炎の発症メカニズムが解明されていないことが大きい。又、腎炎には、腎炎特有の抗原が存在する可能性があるとして、世界中で様々な抗原物質が研究されているが、抗糸球体基底膜(GBM)抗体腎炎を除き、抗原は特定されていない。抗原が特定されれば、そこを標的物質として診断薬や腎炎治療剤の開発が期待できる。
The existence or suggestion of nephritis antigens has been published in many countries in the east and west, and there are many examples of antigens that have been proposed, but none of them has been confirmed yet. Nevertheless, the search for antigens continues because nephritis is thought to occur or cause progression based on an immune response.
In fact, in the specialized journal “kidney and dialysis”, antigen examples are serialized at the beginning of the book as “noticeable kidney-related proteins” (kidney and dialysis 2005 July Vol59 No. 1 Tokyo Medical Co., Ltd.). The only example where the antigen has been determined is “anti-glomerular basement membrane (GBM) antibody nephritis”, a rare nephritis. Anti-GBM antibody nephritis is “acute nephritis” that worsens rapidly.
However, usually the majority of what is called nephritis progress slowly in units of 10 years or more. Among them, there is secondary nephritis caused by diabetes and hypertension, but none of them has an established antigen that promotes the worsening of nephritis.
Here, an outline of type 4 collagen will be described in order to obtain an understanding of the present invention.
Not all type 4 collagen has been elucidated. In type 4 collagen, a large number of molecules bind to each other, and a tissue basement membrane is formed by involving various types of components. Type 4 collagen is also called basement membrane collagen because it is a central component of tissue basement membrane.
Type 4 collagen is known to have 6 types of alpha chains, and one molecule is composed of 3 types of alpha chains. In addition, the type 4 collagen constituting the basement membrane differs in the structure of the three types of alpha chains depending on the tissue. The placenta-derived basement membrane is rich in alpha 1 and alpha 2, and is commonly found in tissue basement membranes throughout the body. The kidney-derived basement membrane is unique and is rich in alpha 3 to alpha 6 chains, suggesting a common alpha chain in the kidney glomeruli, Bowman's sac, and tubule basement membrane.
One molecule of type 4 collagen is divided into three regions: 7S having a triple-stranded helical structure from the N-terminal, central helical part (TH), and NC1 having a non-helical structure in the C-terminal region.
When the tissue is removed from the living tissue, the region obtained by the treatment method is different, and it is a general technique to obtain a triple-stranded helical region by pepsin treatment and NC1 by bacterial collagenase treatment (Extracellular Matrix IRL PRESS / OXFORD UNIVERSITY PRESS Oxford). New York).
On the other hand, nephritis is a case of 30,000 new dialysis patients introduced every year, which is a great burden for the quality of life (QL) of the person and the national medical expenses (6 million yen / year per dialysis). is there. Although dialysis technology has progressed, there are no drugs that identify kidney damage or treat nephritis directly in the very early stages. The reason is largely that the onset mechanism of nephritis has not been elucidated. In addition, various antigenic substances have been studied all over the world because nephritis may have antigens peculiar to nephritis. However, antigens are not specified except for anti-glomerular basement membrane (GBM) antibody nephritis. Not. Once the antigen is identified, it can be expected to develop diagnostic agents and nephritis therapeutic agents using it as a target substance.

抗GBM抗体腎炎の抗原は、腎臓のGBMに存在するタイプ4コラーゲンアルファ3鎖のNC1のC末端36アミノ酸残基に存在する。
稀な腎炎である抗GBM抗体腎炎は急性腎炎に属し、典型的には2週間ほどで重篤な状態になるので、速やかに確定診断する事が必要とされる。確定診断には腎生検の免疫組織染色を用い、GBMに自己抗体である免疫グロブリンIgGの沈着の有無で判定する。しかし、この検査は、検体採取で患者さんへの苦痛と危険性があり、免疫組織染色には専門病理医の高度な診断能力が求められる。
そこで簡便法として、血中に出現する自己抗体を検出するELISAキットが利用されている。現在、日本で唯一診断薬として認可され、保険適用されているのは高価な輸入品である。キット添付の説明書及びそこで引用している文献では、抗GBM抗体腎炎のみが高濃度で自己抗体が検出され、他の腎炎は健常者と同じ程度に低くしか検出されないとしている。同説明書によれば、用いている抗原はウシGBM抗原との記載である。GBMはタイプ4コラーゲンを主成分として多種の成分からなる。大きさから行けばGBM>タイプ4コラーゲン>NC1>アルファ3鎖のNC1>36アミノ酸残基(抗原)である。ウシGBM抗原を用いる事は、この巨大領域には36アミノ酸残基(抗原)以外には他腎炎の抗原が無いと言う暗黙の了解のもとに診断の場で用いられている事になる。なお、GBM抗原部位は、アルファ3鎖のNC1でN末端からのアミノ酸配列が17−31、及び127−141にあるとの報告もある(J.Biol Chem(1993)268,26033−26036)。いずれの抗原部位も、アルファ3鎖である。
Anti-GBM antibody nephritis antigens are present at the NC1 C-terminal 36 amino acid residues of NC1 of type 4 collagen alpha 3 chain present in kidney GBM.
Anti-GBM antibody nephritis, which is a rare nephritis, belongs to acute nephritis, and typically becomes serious in about 2 weeks, so it is necessary to make a definitive diagnosis promptly. For the definitive diagnosis, immunohistochemical staining of renal biopsy is used, and the determination is made based on the presence or absence of deposition of immunoglobulin IgG, which is an autoantibody, on GBM. However, this test is painful and dangerous for patients due to sample collection, and immunohistochemical staining requires the advanced diagnostic ability of a specialized pathologist.
Therefore, as a simple method, an ELISA kit for detecting autoantibodies appearing in blood is used. Currently, it is expensive imported goods that are the only diagnostics approved and covered by insurance in Japan. According to the instructions attached to the kit and the literature cited therein, only the anti-GBM antibody nephritis is detected at a high concentration and the autoantibody is detected, and other nephritis is detected as low as that of a healthy person. According to the instructions, the antigen used is a description of bovine GBM antigen. GBM is composed of various components with type 4 collagen as the main component. From the size, GBM> type 4 collagen>NC1> NC1 of alpha 3 chain> 36 amino acid residues (antigen). The use of bovine GBM antigen is used in diagnosis based on the implicit understanding that there are no other nephritis antigens other than 36 amino acid residues (antigens) in this large region. In addition, there is a report that the GBM antigen site is NC3 of the alpha 3 chain and the amino acid sequence from the N-terminus is 17-31 and 127-141 (J. Biol Chem (1993) 268, 26033-26036). Both antigenic sites are alpha 3 chains.

発明が解決しょうとする課題Problems to be solved by the invention

これまで、世界中で見出だされていない腎炎の抗原部位を見出だす事で、慢性腎炎の早期診断試薬、ジン疾患治療薬、ジン疾患治療薬候補のスクリーニング方法を提示しょうとするものである。By finding the antigenic site of nephritis that has not been found in the world so far, we are going to present screening methods for early diagnosis reagents, gin disease treatment drugs, and gin disease treatment drug candidates for chronic nephritis. is there.

課題を解決するための手段Means for solving the problem

本発明者は、長い間腎疾患や他疾患に伴う二次性腎疾患の治療薬開発と早期検出方法に努めてきた。The present inventor has long sought to develop a therapeutic agent and early detection method for secondary kidney disease associated with kidney disease and other diseases.

先ずウシ腎糸球体よりNC1を精製した。ウシ腎臓よりの収率は僅か0.0025%であり、新鮮なウシ腎臓1kgを原料として約25mgであった。NC1を惹起原として、ラットと前例の無いサルに腎炎を発症させることで、取り出したNC1の抗原性を確認した。
しかし、NC1の採取には多大の時間もいるし、生物体特有の変質を防ぐ必要もあるし、常に均一なものを精製するには多大な費用も掛かる。加えて収率が低い。
First, NC1 was purified from bovine kidney glomeruli. The yield from bovine kidney was only 0.0025%, and it was about 25 mg using 1 kg of fresh bovine kidney as a raw material. The antigenicity of the extracted NC1 was confirmed by causing nephritis in rats and unprecedented monkeys using NC1 as a trigger.
However, it takes a lot of time to collect NC1, and it is necessary to prevent alterations peculiar to living organisms, and it is very expensive to always purify a uniform product. In addition, the yield is low.

続いて約2年、このNC1を抗原とした抗NC1モノクローナル抗体の複数作製に努めた。そして、障害腎を染色し、健常腎臓を染色しないことを特徴とする特異な抗NC1モノクローナル抗体(12D)を見出だした(医学と薬学 53(3):335−341,2005)。同様の抗NC1モノクローナル抗体を作製するには、上記の公開されている文献で可能である。Subsequently, for about two years, efforts were made to produce a plurality of anti-NC1 monoclonal antibodies using NC1 as an antigen. Then, a specific anti-NC1 monoclonal antibody (12D) characterized by staining a damaged kidney but not a healthy kidney was found (Medicine and Pharmacy 53 (3): 335-341, 2005). Similar anti-NC1 monoclonal antibodies can be produced in the above published literature.

そこで、この、障害腎を染色し健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体を用いて、NC1より抗原部位を特定する事とした。
ヒトNC1のアミノ酸配列は、公開されている。抗NC1モノクローナル抗体に免疫反応性を持つペプチドは、NC1に限定して示すが、本願はこれに限定されない。本検索方法はあらゆるペプチドからの本願の抗NC1モノクローナル抗体よる免疫反応性を持つペプチドの検索にあてはまる。
Therefore, it was decided to identify the antigenic site from NC1 using an anti-NC1 monoclonal antibody characterized by staining the damaged kidney but not the healthy kidney.
The amino acid sequence of human NC1 has been published. Peptides having immunoreactivity with the anti-NC1 monoclonal antibody are limited to NC1, but the present application is not limited thereto. This search method is applicable to search for peptides having immunoreactivity with the anti-NC1 monoclonal antibody of the present application from all peptides.

コラーゲン1分子のNC1のアルファ鎖1本当りはアミノ酸残基数は約230である。公表されているアミノ酸配列は複数あり、N端の1個から3個が異なるが、本願発明者はニノミヤの提示配列に従った。
アルファ鎖は6本であるから、総計1380アミノ酸残基を調べれば良いが手法の確立と膨大な手間が求められる。
そこで、活性部位を予測するパソコンソフトを使用する事とした。抗GBM抗体腎炎の抗原で知られるNC1アルファ3鎖では、N端5位置から18位置のアミノ酸鎖(TTRGFVFTRHSQTT)をパソコンソフト専門家より指定された。そこで同位置を含むN端から連続した20アミノ酸残基(以下3−1)と、対象にNC1アルファ4鎖、NC1アルファ5鎖(以下5−1)、NC1アルファ6鎖の同位置のペプチドを検討した。更に、パソコンソフトの指定した部位(SDMFSKPQSET)も含む5−15(後述)も検討した。しかし、いずれも、期待した結果は得られなかった。
The number of amino acid residues per one alpha chain of NC1 of one collagen molecule is about 230. There are a plurality of published amino acid sequences, and 1 to 3 N-terminals are different, but the present inventor followed the sequence presented by Ninomiya.
Since there are six alpha chains, it is sufficient to examine a total of 1380 amino acid residues, but establishment of a method and enormous effort are required.
Therefore, we decided to use PC software that predicts the active site. In the NC1 alpha 3 chain known as an anti-GBM antibody nephritis antigen, an amino acid chain (TTRGFVFTRHSQTT) from the N-terminal position 5 to 18 has been designated by a PC software expert. Therefore, there are 20 amino acid residues (hereinafter 3-1) continuous from the N-terminus including the same position, and NC1 alpha 4 chain, NC1 alpha 5 chain (hereinafter 5-1), and NC1 alpha 6 chain peptides at the same position as the target. investigated. Furthermore, 5-15 (described later) including a part (SDMFSKPQSET) designated by the personal computer software was also examined. However, none of the expected results were obtained.

又、別途試験の結果は、抗原5−1がパソコンソフトで指定されなかったにもかかわらず、抗原3−1と免疫反応性に差がなかった。そこで、抗原部位を見出だせるか否か不明ながら、より網羅的に検索する事とした。
その時、パソコンソフト指定の3−1と同程度の免疫反応性を示した抗原5−1の連続を、即ち、アルファ5鎖NC1の全域を調べることとした。
In addition, as a result of the separate test, there was no difference in immunoreactivity with the antigen 3-1 even though the antigen 5-1 was not designated by the personal computer software. Therefore, it was decided to search more comprehensively while it was unclear whether or not antigenic sites could be found.
At that time, it was decided to examine the continuity of the antigen 5-1 that showed the same level of immunoreactivity as 3-1 specified by the PC software, that is, the entire region of the alpha 5 chain NC1.

候補ペプチドの合成。
NC1アルファ5鎖をN端から20アミノ酸単位で、5アミノ酸単位を重ねながらNC1アルファ5鎖の全てを20アミノ酸単位で15個の合成ペプチドとした(5−1〜5−15)。ペプチド5−15は、20個のアミノ酸を超えたものを入れた。
ペプチドの作製は合成のみで無く、他の分野で利用されている方法ならいずれでも当業者に可能である。
Synthesis of candidate peptides.
The NC1 alpha5 chain was composed of 20 amino acid units from the N-terminal, and 5 amino acid units were overlapped, so that all of the NC1 alpha5 chain was made into 15 synthetic peptides of 20 amino acid units (5-1 to 5-15). Peptide 5-15 included more than 20 amino acids.
Peptides can be produced not only by synthesis, but also by any method used in other fields by those skilled in the art.

候補ペプチドの検索に用いる免疫反応方法(ELISA)とその試薬。
1)候補ペプチド100ul/well(10ug/ml)をコートしたプレートに、
2)PBS(pH7.4)で100倍希釈した抗NC1モノクローナル抗体(未希釈時1mg/ml)100ulを加えて、23Cで2時間反応後PBSで洗浄し、
3)酵素標識抗マウスIgG抗体100ulを加えて、1時間反応後PBSで洗浄し、
4)発色基質(TMB,過酸化水素)を加えて10分後に、
5)反応停止液(希硫酸)を加えて、直ちに450nmでOD値を測定する。
免疫反応としては、酵素免疫反応に限定されず、AB法、RIA,免疫発光法、沈降反応、凝集反応、ウエスタンブロット法他を含み、酵素標識抗体としてはポリクローナル又はモノクローナル抗体を問わず、又それを放射性物質、発光物質で標識した物、無標識物でも良い。
反応形式は、サンドイッチ法に囚われず、競合法等でも良い。
プレートに替え、ガラス、磁性物質、ラテックスにしても良く、無しにして固相法を用いないことでも良い。
プレートにペプチドをコートする時、コート物質をアビジン、ビオチン、又はこれらの結合した成分を介しても良い。
プレートにコートするペプチドは、複数種を混合しても良く、後から選ばれた混合体を構成ペプチドに別けて再度選んでも良い。
ペプチドは合成のみで無く、他の分野で利用されている方法ならいずれでも当業者に可能である。
Immunoreaction method (ELISA) and its reagents used for searching for candidate peptides.
1) To a plate coated with 100 ul / well (10 ug / ml) of candidate peptide,
2) Add 100 ul of anti-NC1 monoclonal antibody (1 mg / ml undiluted) diluted 100 times with PBS (pH 7.4), react for 2 hours at 23C, and then wash with PBS.
3) Add 100 ul of enzyme-labeled anti-mouse IgG antibody, react for 1 hour and then wash with PBS.
4) Ten minutes after adding the chromogenic substrate (TMB, hydrogen peroxide),
5) Add a reaction stop solution (dilute sulfuric acid) and immediately measure the OD value at 450 nm.
The immune reaction is not limited to the enzyme immune reaction, but includes AB method, RIA, immunoluminescence method, precipitation reaction, agglutination reaction, Western blotting method, etc. May be labeled with a radioactive substance, a luminescent substance, or unlabeled.
The reaction format is not limited to the sandwich method, and may be a competitive method or the like.
Instead of the plate, glass, a magnetic substance, or latex may be used, and without using the solid phase method.
When the peptide is coated on the plate, the coating substance may be avidin, biotin, or a component to which these are bound.
Peptides to be coated on the plate may be mixed in a plurality of types, or a mixture selected later may be selected again by separating it into constituent peptides.
Peptides can be used by those skilled in the art not only by synthesis but also by any method used in other fields.

測定結果は、抗NC1モノクローナル抗体(12D)は、5−12>5−13>5−8>5−10>5−5の順の5か所でOD高値であった。また、対象とした腎炎発症前の尿試料(51歳女性、約1年半後に、高血圧で受診中の大学病院にて慢性腎炎と診断されるTDc No.2)もOD値の順位は異なるが、抗NC1モノクローナル抗体(12D)の示した5か所で高値を示した。As a result of the measurement, the anti-NC1 monoclonal antibody (12D) had high OD values at 5 locations in the order of 5-12> 5-13> 5-8> 5-10> 5-5. In addition, the urine sample before the onset of nephritis (51-year-old woman, TDc No. 2 diagnosed as chronic nephritis at a university hospital about 1 and a half years later with high blood pressure) has a different OD value order. The anti-NC1 monoclonal antibody (12D) showed high values at 5 locations.

抗NC1モノクローナル抗体(12D)が認識した5か所は、単に腎臓の障害により表出した部位であるばかりで無く、ヒト尿も同じ部位で免疫反応を示した事から、これらのペプチドは腎炎の共通した抗原部位である。The five sites recognized by the anti-NC1 monoclonal antibody (12D) are not only the sites expressed by kidney damage, but human urine also showed an immune reaction at the same site. It is a common antigenic site.

障害腎を染色し健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体(12D)用いれば、腎障害の時に特有に出現するNC1様物質を検出でき、腎障害と無関係のNC1を測定しない事が可能となる。Using anti-NC1 monoclonal antibody (12D), which is characterized by staining damaged kidneys and not healthy kidneys, can detect NC1-like substances that appear peculiarly at the time of kidney damage, and do not measure NC1 unrelated to kidney damage Is possible.

腎障害の時に特有に出現するNC1様物質の検出方法(ELISA)とその試薬。
1)ウサギ由来抗NC1抗体(NC1に反応するなら、いずれの動物由来のポリクローナル抗体でも、免疫組織染色で健常腎臓組織に反応する抗NC1モノクローナル抗体でも良い)をコートした96穴マイクロプレートに、
2)PBS(pH7.4)で2倍希釈した尿検体もしくは血清検体100ul/wellを加えて、室温で2時間反応後PBSで3回洗浄し、
3)抗NC1モノクローナル抗体(12D)を加えて、室温で2時間反応後PBSで3回洗浄し、
4)酵素(HRP)標識抗マウスIgG抗体100ulを加えて、室温で1時間反応後PBSで3回洗浄し、
5)発色基質(TMB,過酸化水素)を加えて10分後に、
6)反応停止液(希硫酸)を加えて、直ちに波長450nmでOD値を測定する。
標準物質には、動物の腎臓由来を用いるか、本願のペプチドの1個もしくは複数個を組み合わせて用いる。
更に、本測定の抗体は、本願のペプチドにより作製した抗体(モノクローナル抗体及びポリクローナル抗体)を単独又は組み合わせて用いる事ができる。
免疫反応としては、酵素免疫反応に限定されず、AB法、RIA,免疫発光法、沈降反応、凝集反応、他を含み、酵素標識抗体としてはポリクローナル又はモノクローナル抗体を問わず、又それを放射性物質、発光物質で標識した物、無標識物でも良い。
反応形式は、サンドイッチ法に囚われず、競合法等でも良い。
プレートに替え、ガラス、磁性物質、ラテックスにしても良く、無しにして固相法を用いないことでも良い。
プレートに抗体をコートする時、コート物質をアビジン、ビオチン、又はこれらの結合した成分を介しても良い。
A detection method (ELISA) for NC1-like substances that appears uniquely at the time of renal injury and its reagents.
1) A 96-well microplate coated with a rabbit-derived anti-NC1 antibody (a polyclonal antibody derived from any animal that reacts with NC1 or an anti-NC1 monoclonal antibody that reacts with healthy kidney tissue by immunohistological staining) may be coated.
2) Add 100 ul / well of urine sample or serum sample diluted 2-fold with PBS (pH 7.4), react at room temperature for 2 hours, and then wash with PBS three times.
3) Add anti-NC1 monoclonal antibody (12D), react for 2 hours at room temperature, then wash 3 times with PBS,
4) Add 100 ul of enzyme (HRP) -labeled anti-mouse IgG antibody, react at room temperature for 1 hour, and then wash with PBS three times.
5) Ten minutes after adding the chromogenic substrate (TMB, hydrogen peroxide),
6) Add a reaction stop solution (dilute sulfuric acid) and immediately measure the OD value at a wavelength of 450 nm.
The standard substance is derived from animal kidneys or used in combination with one or more of the peptides of the present application.
Furthermore, the antibody of this measurement can use the antibody (monoclonal antibody and polyclonal antibody) produced with the peptide of this application individually or in combination.
The immune reaction is not limited to the enzyme immune reaction, but includes AB method, RIA, immunoluminescence method, precipitation reaction, agglutination reaction, etc. The enzyme-labeled antibody may be a polyclonal or monoclonal antibody, and may be a radioactive substance. A product labeled with a luminescent substance or a non-labeled product may be used.
The reaction format is not limited to the sandwich method, and may be a competitive method or the like.
Instead of the plate, glass, a magnetic substance, or latex may be used, and without using the solid phase method.
When the antibody is coated on the plate, the coating substance may be avidin, biotin, or a component to which these are bound.

本願の抗NC1モノクローナル抗体以外の抗NC1抗体能を有する血清、尿又はその精製物でもペプチドの検索に使用できる。例えば、動物由来の抗NC1抗体である。NC1で惹起した腎炎モデルは急性腎炎の一種なので、その抗NC1抗体は、ヒト抗GBM抗体の自己抗体に近いので、本願の抗NC1モノクローナル抗体と比較しながら使用を進める事が良い。動物の糖尿病モデルや高血圧モデル由来の生体試料を用いる場合も可能であるが、やはり、本願の抗NC1モノクローナル抗体もしくはヒト慢性腎炎の単離した生体試料(血清や尿他)と比較しながら進める事が良い。Serum, urine, or a purified product thereof having anti-NC1 antibody ability other than the anti-NC1 monoclonal antibody of the present application can be used for searching for peptides. For example, an animal-derived anti-NC1 antibody. Since the nephritis model induced by NC1 is a kind of acute nephritis, the anti-NC1 antibody is close to the autoantibody of the human anti-GBM antibody, so that it is better to use it compared with the anti-NC1 monoclonal antibody of the present application. Although it is possible to use biological samples derived from animal diabetes models or hypertension models, it is still possible to proceed while comparing the anti-NC1 monoclonal antibody of the present application or an isolated biological sample of human chronic nephritis (serum, urine, etc.). Is good.

本発明に従って、ペプチドを診断、治療、薬剤のスクリーニング用途に用いる事ができる。追加のアミノ酸や種々のアミノ酸配列の置換で修飾された配列も使用できる。In accordance with the present invention, peptides can be used for diagnostics, therapeutics, drug screening applications. Additional amino acids and sequences modified by substitution of various amino acid sequences can also be used.

本発明の範疇のペプチドはNC1様免疫反応性を持つ事である。用いるペプチドは、提示ペプチドと同等のNC1様免疫反応性ペプチドで有る限り、短くしても、改変しても、修飾しても、合体させたアミノ酸配列でも良い。例えば5−12と5−13の合体である。提示ペプチドの一部を変更するには、簡単には動物由来の配列を用いても良い。例えばウシ由来は、アルファ5鎖全てのアルファ鎖が公開されている。更には、全く別配列のアミノ酸配列でも良い。
本願は、アルファ5鎖のNC1のアミノ酸配列を全て含むもので、一部を用いたものでも良く、5−1の様に、尿や血清他のヒト腎炎試料とNC1様免疫反応性を持つものならいずれのペプチド域も利用できる。より望ましくは、全域アルファ5鎖よりもNC1様免疫反応性の優れたペプチドで、一層望ましく、より短いペプチドでよりNC1様免疫反応性を示すペプチドである。
Peptides within the scope of the present invention have NC1-like immunoreactivity. As long as the peptide used is an NC1-like immunoreactive peptide equivalent to the presented peptide, it may be shortened, altered, modified, or a combined amino acid sequence. For example, a combination of 5-12 and 5-13. In order to change a part of the displayed peptide, a sequence derived from an animal may be used. For example, for bovine origin, all alpha chains of the alpha 5 chain have been published. Furthermore, a completely different amino acid sequence may be used.
This application includes all of the amino acid sequence of NC1 of the alpha 5 chain, which may be partially used, and has NC1-like immunoreactivity with human nephritis samples such as urine and serum, as in 5-1. Any peptide region can be used. More desirably, the peptide is more excellent in NC1-like immunoreactivity than the entire alpha 5 chain, and more desirable is a peptide that exhibits NC1-like immunoreactivity in a shorter peptide.

発明の効果The invention's effect

作製したペプチド及びその抗体は、NC1及びその抗体の代用として利用できる。特にペプチドは、NC1を腎臓から精製するのに比べ格段に廉価で、合成機で均一に短時間に作製できるので、扱い易い。
本願発明で用いたアルファ5鎖NC1の網羅的ペプチドマップは(もちろん、ペプチド鎖は更に長くしても短くしても良い)、腎炎患者個々の免疫反応性の違いや、病気進行に従って変化する免疫反応性が捕らえるにも有用で、テーラーメード医療に役立つものである。
抗NC1モノクローナル抗体、特には免疫組織染色に用いる時、障害腎を染色し、健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体は、直接的間接的に、慢性腎炎の検出と治療とに役立つ。
The prepared peptide and its antibody can be used as a substitute for NC1 and its antibody. In particular, peptides are much cheaper than purifying NC1 from the kidney, and are easy to handle because they can be produced uniformly and in a short time by a synthesizer.
The comprehensive peptide map of the alpha5 chain NC1 used in the present invention (of course, the peptide chain may be longer or shorter) is the immunity that changes according to the differences in the immunoreactivity of individual patients with nephritis and the progression of the disease. It is useful for capturing reactivity and is useful for tailor-made medicine.
An anti-NC1 monoclonal antibody, particularly an anti-NC1 monoclonal antibody characterized by staining a damaged kidney and not a healthy kidney when used for immunohistological staining, is used directly and indirectly for the detection and treatment of chronic nephritis. Useful.

マウス由来抗NC1モノクローナル抗体(12D)とヒトTDC No2(尿)とによる アルファ5鎖NC1由来ペプチドの免疫反応性比較 *明細書の3−1は図のH4NA3−1に、5−1は図のH4NA5−1に相当する。以下同じ。Comparison of immunoreactivity of alpha5-chain NC1-derived peptides with mouse-derived anti-NC1 monoclonal antibody (12D) and human TDC No2 (urine) * 3-1 in the specification is H4NA3-1 in the figure, 5-1 is in the figure It corresponds to H4NA5-1. same as below. ヒトタイプ4コラーゲンNC1の アルファ3鎖、アルファ4鎖 アルファ5鎖、アルファ6鎖Human type 4 collagen NC1 alpha 3 chain, alpha 4 chain alpha 5 chain, alpha 6 chain

Claims (8)

抗タイプ4コラーゲンNC1(以下NC1)モノクローナル抗体と免疫反応性を有するペプチド及び又はその抗体Peptide having immunoreactivity with anti-type 4 collagen NC1 (hereinafter NC1) monoclonal antibody and / or antibody thereof 免疫組織染色に用いる時、障害腎を染色し、健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体と免疫反応性を有するペプチド及び又はその抗体Peptide having immunoreactivity with anti-NC1 monoclonal antibody and / or antibody thereof characterized in that when used for immunohistochemical staining, damaged kidney is stained and healthy kidney is not stained 免疫組織染色に用いる時、障害腎を染色し、健常腎臓を染色しないことを特徴とする抗NC1モノクローナル抗体を用いたNC1様物質の検出方法A method for detecting an NC1-like substance using an anti-NC1 monoclonal antibody characterized in that when used for immunohistochemical staining, the damaged kidney is stained and the healthy kidney is not stained 下記のアミノ酸配列を含むペプチド及び又はその抗体(各ペプチドは連続するアミノ酸配列をN端から5個単位に見やすい様に示した)
1)GRGTC NYYAN SYSFW LATVD 5−13
2)SCLEE FRSAP FIECH GRGTC 5−12
3)GWDSL WIGYS FMMHT SAGAE 5−10
4)PFISR CAVCE APAVV IAVHS 5−8
5)STMPF MFCNI NNVCN FASRN 5−5
Peptides containing the following amino acid sequences and / or antibodies thereof (each peptide is shown so that a continuous amino acid sequence can be easily seen from the N-terminal to 5 units)
1) GRGTC NYYAN SYSFW LATVD 5-13
2) SCLEE FRSAP FIICH GRGTC 5-12
3) GWDSL WIGYS FMMHT SAGAE 5-10
4) PFISR CAVCE APAVV IAVHS 5-8
5) STMPF MFCNI NNVCN FASRN 5-5
前記の請求項4のアミノ酸配列を含むペプチドのいずれか1つと、4個以上のアミノ酸配列と相同性を持ち、タイプ4コラーゲンNC1様免疫活性を持つペプチドと及び又はその抗体Any one of the peptides comprising the amino acid sequence of claim 4, a peptide having homology with 4 or more amino acid sequences and having type 4 collagen NC1-like immunological activity and / or an antibody thereof 請求項2のペプチド及び又はその抗体を用いたワクチン及び又は免疫調整剤Vaccine and / or immunomodulator using the peptide of claim 2 and / or its antibody 請求項2のペプチド及び又はその抗体を用いた腎炎検出方法A method for detecting nephritis using the peptide of claim 2 and / or its antibody 請求項2の抗NC1モノクローナル抗体を用いたワクチン及び又は腎疾患治療剤及び又は免疫調整剤A vaccine and / or a renal disease therapeutic agent and / or an immunomodulator using the anti-NC1 monoclonal antibody of claim 2
JP2006188600A 2006-06-12 2006-06-12 Anti-nc1 monoclonal antibody reactive peptide Pending JP2007332122A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014163924A (en) * 2013-02-21 2014-09-08 Morisuke Yokoyama High blood pressure detection reagent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014163924A (en) * 2013-02-21 2014-09-08 Morisuke Yokoyama High blood pressure detection reagent

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