JP2004091454A - Antibody, method for producing the same and method for quantitatively determining antigen by using the same antibody - Google Patents

Antibody, method for producing the same and method for quantitatively determining antigen by using the same antibody Download PDF

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JP2004091454A
JP2004091454A JP2002291667A JP2002291667A JP2004091454A JP 2004091454 A JP2004091454 A JP 2004091454A JP 2002291667 A JP2002291667 A JP 2002291667A JP 2002291667 A JP2002291667 A JP 2002291667A JP 2004091454 A JP2004091454 A JP 2004091454A
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antibody
cells
antigen
producing
mab
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Hiroyuki Tanaka
田中 宏幸
Yukihiro Masayama
正山 征洋
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple and highly sensitive method for quantitatively determining an antigen, having a high reproducibility by forming antibodies against peoniflorin (PF) which does not exhibit any antigenic property, and its related compound. <P>SOLUTION: The antibodies against PF and its related compounds are obtained by cleaving a part of saccharide part of the PF, bonding the carboxyl group in the PF with the lysine residue of a protein such as bovine serum albumin (BSA) by carbodiimide method using EDC to impart antigenic property, immunizing an animal with the obtained substance, isolating spleen after the immunization, fusing with myeloma cells by using a polyethylene glycol, selecting only fused cells (hybridomas) by using an HAT medium, cloning the hydridomas by a limiting dilution method and isolating hybridomas selected by using the PF-human serum albumin (HSA) complex and producing anti-PF monoclonal antibody (MAb). The quantitative analysis method is performed by adding the PF, its related compound and the antibody into a well adsorbed with the antigen covalently bonded with the protein, incubating, washing the well and then using a labeled immuno-quantitative determination method. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明に属する技術分野】
本発明は芍薬の主有効成分であるPEに対するMAbを生産するハイブリドーマに関する。
【0002】
【従来の技術】
細胞融合技術は、ケーラーとミルスタインの報告(Nature,495−497頁、1975年)以来急速に発展した。哺乳動物の脾細胞と癌細胞であるミエローマ細胞を融合させた雑種細胞をハイブリドーマと称する。ハイブリドーマは用いた脾細胞が産生する抗体産生能を有することから、多くの蛋白質やペプチドの様な高分子化合物に対する抗体の生産に用いられてきた。
【0003】
一方、本出願人は通常は抗原とは成りえない芍薬の配糖体に対するMAbを産生するハイブリドーマを作製する。PEは有用な薬理活性を有する芍薬の主要な配糖体である。
【0004】
【発明が解決しようとする課題】
芍薬中のPFの含有量は少なく、その検出は容易ではない。ましてや漢方薬中の含有量を精査するためには前処理等に多大な労力を要する。このため前処理を必要とせず、再現性があり、かつ高感度なアッセイ系が要求される。これに対応出来うるのはMAb以外にない。
【0005】
【課題を解決するための手段】
本発明者等は、上述の問題点を解決すべく研究を重ねた結果、細胞融合によりPFに対する、MAbを産生するハイブリドーマを得、本ハイブリドーマを培養することによって抗PF抗体を大量に生産することに成功した。本抗体を用いることによって高感度、再現性良好な、かつ前処理を必要としないアッセイ系を完結した
【0006】
【実施の形態】抗PE MAbを生産するハイブリドーマは以下の様に作成する。すなわち、(1)抗原としてPF−BSA複合体を免疫した動物の抗体産生脾臓細胞を作成する。(2)ミエローマ細胞を培養増殖し、調整する。(3)上記2種の細胞をポリエチレングリコールを媒体として融合する。(4)得られたハイブリドーマをHAT培地にて選抜する。(5)抗PFMAb生産ハイブリドーマを選抜する。(6)選抜ハイブリドーマをクローニングする。これらの行程について詳細に説明する。
【0007】
(抗体産生細胞の調整)
PF−BSA複合体を動物に免疫する。免疫法としてはフロイントのコンプリートアジュバンドを併用する手法がとられる。動物としてはマウス、ラット、ウサギ、モルモット、ヒツジなどが例示される。抗体産生細胞としては脾臓、リンパ節、抹消血液等から分離した細胞が使用される。
【0008】
(骨髄腫細胞の調整)
細胞融合に使用する骨髄腫細胞は特に限定されず、各種の哺乳動物の細胞株が利用可能であるが、抗体産生細胞の調整に用いた動物と同種の細胞株を使用するのが好ましい。用いる細胞株は細胞融合の後に、未融合の骨髄腫細胞が選択培地で生存できず、ハイブリドーマのみが増殖可能なようにすることによって、未融合細胞と融合細胞を選別することを考慮して、特定の薬剤抵抗性を有するものが好ましい。例えば8−アザグアニン抵抗性の細胞は、HAT培地中で生育できない性質を有するため好んで用いられる。具体的には、マウス骨髄腫細胞株、PAI,P3−X63−Ag8,P3−X63−Ag8−UI,P3−NSI/1−Ag4−1,X63−Ag8−6.5.3.,SP2/0−Ag14,FO,S194/5XXO,BU.1,MPC11−45.6.,TG.1.7等が用いられる。
【0009】
(融合細胞)
細胞融合は通常MEM培地、RMI1640培地、IMDM培地等のe−RDF培地中で、骨髄腫細胞と抗体産生細胞を混合(混合比は通常1:4−1:10)することにより行われる。融合促進剤としては平均分子量1000−6000のポリエチレングリコール(PEG)が使用できる。PEGの使用濃度は通常30−50%である。
【0010】
(ハイブリドーマの選択的増殖)
融合を終えた細胞は、10%FCS含有e−RDF培地などで適当に希釈し、遠心分離する。沈査を選択培地(例えばHAT培地)で浮遊し、96穴ウエルマイクロプレートに接種した後に、5%炭酸ガス培養装置で培養する。選択培地で生育してくる細胞はハイブリドーマである。
【0011】
(抗体産生ハイブリドーマの検索)
抗体産生ハイブリドーマの検索は常法に従えばよく、特に限定されない。例えばハイブリドーマの増殖した培養液を採取し、PF−HSAと反応させ、酵素、蛍光物質、発光物質などでラベルした2次抗体との反応により検索できる。
【0012】
(クローニング)
抗体産生ハイブリドーマを含むことを確認した培養ウエル中の細胞を限界希釈法などによりクローニングを行い、MAb産生ハイブリドーマを得る。以上の操作により抗PF MAb産生ハイブリドーマC31B9を得た。このハイブリドーマはPFに対する特異的なMAbを産生する新規な細胞である。
【0013】
(抗PF MAbの調整)
上記で得られたハイブリドーマを適切な培地中で培養することにより、その培養上清から本発明MAbが得られる。大量に生産する方法としては骨髄腫細胞由来動物と同種の動物にプリスタン等の鉱物油を腹腔内投与後、ハイブリドーマを接種する。接種後、腹水を採取し、通常の抗体分離操作により抗PF MAbを得る。また、無血清培地で培養し、通常の手法で抗PF MAbを得る。
【0014】
(抗PF MAbのキャラクタリゼーション)
精製した抗PF−MAbのサブクラス、軽鎖等を通常の方法で決定した。
【0015】
(発明の効果)
本抗体は極めて特異性が高いので通常のELISAに用いることにより、再現性が高く、高感度、かつ前処理が不要な定量が可能である。以下の実施例で示すように各種の芍薬のPF含有量を簡便に定量出来る。
【0016】
【実施例】
(抗PE MAb産生ハイブリドーマの製造)
(抗原の調整)
PF5mgをメタノール4mlに溶かした液を,5mgの過ウ素酸ナトリウムを水0.6mlに溶かした液に滴下し室温で1時間反応した。BSA添加炭酸バッファー(50mM,pH9.6,1ml)を上記の反応液に加えて反応した。反応後水に対して4℃で透析を行い、凍結乾燥後PF−BSA(4.8mg)を得た。なおELISAで使用するPE−HSAについても同様な方法で作製した。
【0017】
(抗原中のハプテン数の検討)
得られたPF−BSA抱合体の微量をとり、過剰のシナピン酸を添加して混合する。混合物の小量をカセットのウエルに入れ、マルデイトフマスにて測定する(図1)。
【0018】
(免疫脾細胞の調整)
PF−BSA抱合体50μgをフロイント−コンプリート−アジュバントに乳濁化させ、BALB/C系マウスの腹腔内に投与した。以後、2週間の間隔で50μgのPF−BSA抱合体アジュバント溶液を2回同様に投与し、最後にPE−BSA抱合体のみを100μg投与し免疫を完了した。3日後にマウスを麻酔下屠殺し、脾臓を摘出した。脾臓を細断した後、100メッシュのナイロン網でろ過し、脾臓の単離細胞を得た。
【0019】
(ハイブリドーマの調整)
単離した免疫脾細胞に低張液(155mM塩化アンモニューム)を加えて赤血球を溶血した後、e−RDF培地で細胞を3回洗う。マウス骨髄腫細胞もe−RDF培地で3回洗浄した。両細胞数を計測し脾細胞と骨髄腫細胞を10:1の割合として遠心をする。上清を捨て、沈殿した細胞を充分解きほぐし、ポロエチレングリコール(PEG)4、000を培地で希釈した50%液を1.0ml滴下して融合を行った。37℃、30秒間静置した後、e−RDF培地5mlを5分間かけて添加した。1、000rpmで10分間遠心した。沈殿を10%FCS添加IMDMにより洗い、遠心して上清を捨てた。ヒポキサンチン10−2M、アミノプテリン4x10−7Mおよびチミジン1.5x10−5Mを加えた(HAT−)10%FCS添加e−RDF培地を用いて沈殿を再び浮遊させ、96ウエルマイクロプレートに100μlずつ分注した。3日毎に同一培地を50μl追加し、細胞の増殖を確認した。
【0020】
(抗体産生ハイブリドーマの検索)
ハイブリドーマが増殖したウエルの液を採取し、PF−HSA抱合体を結合させた別のウエルに添加し、直接ELISAによりPFに対するMAb産生ハイブリドーマを検索した。即ち、96ウエルマイクロプレートにPF−HSA抱合体0.1μg/100μl/ウエルを分注し、37℃で1時間インキュベートしてウエルに吸着させた。このウエルに培養上清を100μlずつ分注し抗原抗体反応を行った。0.05%Tween20含有リン酸緩衝食塩水(T−PBS)で3回洗浄した。パーオキシダーゼ標識ヤギ抗マウスIgG抗体1000倍希釈液をウエルあたり100μl添加し、1時間後にTPBSで洗浄した。0.003%過酸化水素、ABTS0.3mg/ml含有クエン酸緩衝液を添加して発色させた。20分後プレートリーダーを用いて405nmの波長で吸光度を測定した。発色したウエルの細胞を採取した。
【0021】
(抗PF MAb産生ハイブリドーマのクローニング)
抗体産生ハイブリドーマを限界希釈してウエルに分注した。抗体産生能を持ち、かつ増殖したハイブリドーマを同様に3回クローニングしてクローンを得た。
【0022】
(抗PE MAbの調整)
上記の抗体産生ハイブリドーマを無血清培地(10μg/mlインスリン、35μg/mlトランスフェリン、20μMエタノールアミン、25nMセレニューム添加eRDF培地)で37℃、炭酸ガス培養器で培養した。上清をプロテインGFFカラムを用いて精製した。即ち、上清をトリス緩衝液でpH7に調整し、カラムに付す。カラムを10mMリン酸緩衝液で洗浄後、吸着している抗体を100mMクエン酸緩衝液で溶出する。得られた抗体溶液は水に対して4回透析し、最後に凍結乾燥して精製抗体をえた。
【0023】
(競合的ELISAによる定量)
PF−HSA抱合体溶液(1μg/ml)を50μずつウエルに添加し1時間反応し吸着させる。比特異的結合を除去するために5%スキンミルク添加PBS溶液300μlを加え1時間反応してブロッキングする。50μlの各種濃度の試料溶液を加え、さらに抗PEMAb溶液(1μg/ml)50μlを添加して1時間インキュベートした。TPBSで3回洗浄し、1000倍希釈したパーオキシダーゼ標識抗マウス抗体100μlを加え1時間反応した。1時間後にTPBSで洗浄した。0.003%過酸化水素、ABTS0.3mg/ml含有クエン酸緩衝液を添加して発色させた。15分後に発色を405nmで測定。各濃度のPEの吸光度から検量線を作成した(図2)。
【0024】
(交差反応性の調査)
PFおよびモノテルペン配糖体の芍薬固有の配糖体類、およびその他のテルペン類を測定した。表1に見られる通り、芍薬の薬理活性を代表している主活性成分であるPFとアルビフロリン(AL)に特異的に親和性を持つ抗体であることが明らかとなった。また,ベンジルペオニフロリンに約30%の交差反応性が認められたが,その他の成分には殆ど交差反応性を示さなかった(図3の構造式参照)。

Figure 2004091454
【0025】
(各種芍薬のPFおよびアルビフロリン(AL)含有量)
各種芍薬の乾燥粉末5mgをメタノール0.5mlで5回抽出する。抽出液を合わせて遠心にかける。上清を10%メタノール溶液で適切な濃度に希釈して実施例に準じて定量する。結果を表2に示す。PFおよびAL含有量を通常の方法によりHPLCで分析した。それらの分析値と抗体を用いて分析した結果(ELISA)と比較したところ両者は非常に良好な一致をみた。このことから今回開発した芍薬の活性本体であるPFおよびAL含量の分析法は信頼性が高く,また,高感度かつ再現性が良好なことが明らかとなった。
Figure 2004091454

【図面の簡単な説明】
【図1】実施例の抗原のハプテン数を調査したマルジマススペクトログラフ。
【図2】実施例の抗体C31B9の検量線を示す片対数グラフ。
【図3】ペオニフロリンと関連化合物の構造式。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hybridoma that produces a MAb against PE, which is a main active ingredient of peony.
[0002]
[Prior art]
Cell fusion technology has evolved rapidly since the report of Kohler and Milstein (Nature, pp. 495-497, 1975). Hybrid cells obtained by fusing mammalian spleen cells and myeloma cells as cancer cells are referred to as hybridomas. Hybridomas have the ability to produce antibodies produced by the spleen cells used, and thus have been used to produce antibodies against high molecular compounds such as many proteins and peptides.
[0003]
On the other hand, the present applicant creates a hybridoma that produces a MAb against the glycoside of Shakuyaku, which cannot normally serve as an antigen. PE is a major glycoside of peony with useful pharmacological activity.
[0004]
[Problems to be solved by the invention]
The content of PF in the peony is low and its detection is not easy. In addition, a great deal of labor is required for pretreatment and the like in order to closely examine the content of the herbal medicine. Therefore, a reproducible and highly sensitive assay system that does not require pretreatment is required. There is nothing other than MAb that can cope with this.
[0005]
[Means for Solving the Problems]
The present inventors have conducted studies to solve the above-mentioned problems, and as a result, obtained a hybridoma that produces MAb against PF by cell fusion, and produced a large amount of anti-PF antibody by culturing the hybridoma. succeeded in. By using this antibody, an assay system with high sensitivity, good reproducibility, and requiring no pretreatment has been completed.
DESCRIPTION OF THE PREFERRED EMBODIMENTS A hybridoma producing an anti-PE MAb is prepared as follows. That is, (1) antibody-producing spleen cells of an animal immunized with a PF-BSA complex as an antigen are prepared. (2) Myeloma cells are cultured and grown and adjusted. (3) The above two cells are fused using polyethylene glycol as a medium. (4) The obtained hybridoma is selected on a HAT medium. (5) Select anti-PFMAb-producing hybridomas. (6) Cloning the selected hybridoma. These steps will be described in detail.
[0007]
(Preparation of antibody-producing cells)
Animals are immunized with the PF-BSA conjugate. As an immunization method, a method using Freund's complete adjuvant in combination is used. Examples of animals include mice, rats, rabbits, guinea pigs, sheep, and the like. Cells isolated from spleen, lymph nodes, peripheral blood, etc. are used as antibody-producing cells.
[0008]
(Preparation of myeloma cells)
The myeloma cells used for cell fusion are not particularly limited, and various mammalian cell lines can be used, but it is preferable to use the same cell line as the animal used for preparing the antibody-producing cells. Considering that after cell fusion, unfused myeloma cells cannot survive in the selection medium and only hybridomas can proliferate after cell fusion, so that unfused cells and fused cells are selected. Those having a particular drug resistance are preferred. For example, 8-azaguanine-resistant cells are preferably used because they have a property that they cannot grow in a HAT medium. Specifically, a mouse myeloma cell line, PAI, P3-X63-Ag8, P3-X63-Ag8-UI, P3-NSI / 1-Ag4-1, X63-Ag8-6.5.3. , SP2 / 0-Ag14, FO, S194 / 5XXO, BU. 1, MPC11-45.6. , TG. 1.7 or the like is used.
[0009]
(Fused cells)
Cell fusion is usually performed by mixing myeloma cells and antibody-producing cells in an e-RDF medium such as a MEM medium, an RMI1640 medium, or an IMDM medium (mixing ratio is usually 1: 4-1: 10). As the fusion promoter, polyethylene glycol (PEG) having an average molecular weight of 1,000 to 6,000 can be used. The working concentration of PEG is usually 30-50%.
[0010]
(Selective growth of hybridoma)
The cells after the fusion are appropriately diluted with e-RDF medium containing 10% FCS and centrifuged. The sediment is suspended in a selection medium (for example, HAT medium), inoculated into a 96-well microplate, and then cultured in a 5% carbon dioxide gas culture apparatus. Cells growing on the selection medium are hybridomas.
[0011]
(Search for antibody-producing hybridomas)
The search for antibody-producing hybridomas may be performed according to a conventional method, and is not particularly limited. For example, a culture solution in which a hybridoma has grown can be collected, reacted with PF-HSA, and searched for by reaction with a secondary antibody labeled with an enzyme, a fluorescent substance, a luminescent substance, or the like.
[0012]
(Cloning)
The cells in the culture wells confirmed to contain the antibody-producing hybridoma are cloned by a limiting dilution method or the like to obtain a MAb-producing hybridoma. By the above operation, anti-PF MAb-producing hybridoma C31B9 was obtained. This hybridoma is a novel cell that produces a specific MAb for PF.
[0013]
(Adjustment of anti-PF MAb)
By culturing the hybridoma obtained above in a suitable medium, the MAb of the present invention can be obtained from the culture supernatant. As a method for mass production, an animal of the same species as the myeloma cell-derived animal is intraperitoneally administered with a mineral oil such as pristane and then inoculated with a hybridoma. After inoculation, ascites is collected, and an anti-PF MAb is obtained by a usual antibody separation operation. Further, the cells are cultured in a serum-free medium, and an anti-PF MAb is obtained by a usual method.
[0014]
(Characterization of anti-PF MAb)
The subclass, light chain, etc. of the purified anti-PF-MAb were determined by a conventional method.
[0015]
(The invention's effect)
Since this antibody has extremely high specificity, it can be used in ordinary ELISA to achieve high reproducibility, high sensitivity, and quantification requiring no pretreatment. As shown in the following examples, the PF content of various peony can be easily determined.
[0016]
【Example】
(Production of anti-PE MAb producing hybridoma)
(Preparation of antigen)
A solution of 5 mg of PF dissolved in 4 ml of methanol was added dropwise to a solution of 5 mg of sodium periodate dissolved in 0.6 ml of water, and reacted at room temperature for 1 hour. BSA-added carbonate buffer (50 mM, pH 9.6, 1 ml) was added to the above reaction solution for reaction. After the reaction, the solution was dialyzed against water at 4 ° C., and lyophilized to obtain PF-BSA (4.8 mg). In addition, PE-HSA used in ELISA was produced in the same manner.
[0017]
(Examination of hapten number in antigen)
Take a trace amount of the obtained PF-BSA conjugate, add excess sinapinic acid and mix. A small amount of the mixture is placed in the wells of a cassette and measured on Maldeit Fuma (FIG. 1).
[0018]
(Preparation of immune splenocytes)
50 μg of the PF-BSA conjugate was emulsified in Freund's complete-adjuvant and administered intraperitoneally to BALB / C mice. Thereafter, 50 μg of the PF-BSA conjugate adjuvant solution was similarly administered twice at two-week intervals, and finally 100 μg of the PE-BSA conjugate alone was administered to complete the immunization. Three days later, the mouse was sacrificed under anesthesia, and the spleen was removed. After shredding the spleen, the mixture was filtered through a 100-mesh nylon net to obtain isolated spleen cells.
[0019]
(Adjustment of hybridoma)
A hypotonic solution (155 mM ammonium chloride) is added to the isolated immunized splenocytes to lyse the erythrocytes, and the cells are washed three times with e-RDF medium. Mouse myeloma cells were also washed three times with e-RDF medium. The numbers of both cells are counted, and splenocytes and myeloma cells are centrifuged at a ratio of 10: 1. The supernatant was discarded, the precipitated cells were decomposed and loosened, and 1.0 ml of a 50% solution of polyethylene glycol (PEG) 4,000 diluted with a medium was added dropwise to perform fusion. After leaving still at 37 ° C. for 30 seconds, 5 ml of e-RDF medium was added over 5 minutes. Centrifuged at 1,000 rpm for 10 minutes. The precipitate was washed with IMDM supplemented with 10% FCS, centrifuged, and the supernatant was discarded. The precipitate was resuspended using 10% FCS-supplemented e-RDF medium supplemented with 10-2 M hypoxanthine, 4 × 10 −7 M aminopterin, and 1.5 × 10 −5 M thymidine, and 100 μl aliquots were placed on a 96-well microplate. Noted. Every three days, the same medium was added in an amount of 50 μl, and cell growth was confirmed.
[0020]
(Search for antibody-producing hybridomas)
The liquid of the well in which the hybridoma had grown was collected, added to another well to which the PF-HSA conjugate was bound, and the MAb producing hybridoma to PF was searched by direct ELISA. That is, 0.1 μg / 100 μl / well of the PF-HSA conjugate was dispensed into a 96-well microplate and incubated at 37 ° C. for 1 hour to be adsorbed to the well. 100 μl of the culture supernatant was dispensed into each well to carry out an antigen-antibody reaction. The plate was washed three times with a phosphate buffered saline solution containing 0.05% Tween 20 (T-PBS). A peroxidase-labeled goat anti-mouse IgG antibody 1000-fold diluted solution was added in an amount of 100 μl per well, and one hour later, the well was washed with TPBS. Citrate buffer containing 0.003% hydrogen peroxide and 0.3 mg / ml ABTS was added for color development. After 20 minutes, the absorbance was measured at a wavelength of 405 nm using a plate reader. The cells of the colored wells were collected.
[0021]
(Cloning of anti-PF MAb producing hybridoma)
The antibody-producing hybridoma was subjected to limiting dilution and dispensed into wells. Hybridomas having antibody-producing ability and proliferating were similarly cloned three times to obtain clones.
[0022]
(Adjustment of anti-PE MAb)
The above antibody-producing hybridoma was cultured in a serum-free medium (eRDF medium supplemented with 10 μg / ml insulin, 35 μg / ml transferrin, 20 μM ethanolamine, and 25 nM serum) at 37 ° C. in a carbon dioxide incubator. The supernatant was purified using a protein GFF column. That is, the supernatant is adjusted to pH 7 with Tris buffer and applied to the column. After washing the column with 10 mM phosphate buffer, the adsorbed antibody is eluted with 100 mM citrate buffer. The obtained antibody solution was dialyzed four times against water and finally freeze-dried to obtain a purified antibody.
[0023]
(Quantification by competitive ELISA)
A PF-HSA conjugate solution (1 μg / ml) is added to the wells in 50 μl increments, and the mixture is allowed to react and adsorb for 1 hour. To remove specific binding, 300 μl of a PBS solution containing 5% skin milk was added, and the mixture was reacted for 1 hour to perform blocking. 50 μl of sample solutions of various concentrations were added, and 50 μl of an anti-PEMAb solution (1 μg / ml) was further added, followed by incubation for 1 hour. After washing three times with TPBS, 100 μl of a 1000-fold diluted peroxidase-labeled anti-mouse antibody was added and reacted for 1 hour. After 1 hour, the plate was washed with TPBS. Citrate buffer containing 0.003% hydrogen peroxide and 0.3 mg / ml ABTS was added for color development. Color development was measured at 405 nm after 15 minutes. A calibration curve was created from the absorbance of PE at each concentration (FIG. 2).
[0024]
(Survey of cross-reactivity)
Glycosides peculiar to Shakuyaku of PF and monoterpene glycosides, and other terpenes were measured. As shown in Table 1, it was revealed that the antibody has specific affinity for PF and albiflorin (AL), which are the main active ingredients representing the pharmacological activity of Shakuyaku. In addition, benzylpeoniflorin was found to have a cross-reactivity of about 30%, but showed little cross-reactivity to other components (see the structural formula in FIG. 3).
Figure 2004091454
[0025]
(PF and Albiflorin (AL) content of various peony)
5 mg of dry powder of various peony is extracted five times with 0.5 ml of methanol. Combine the extracts and centrifuge. The supernatant is diluted to an appropriate concentration with a 10% methanol solution and quantified according to the examples. Table 2 shows the results. The PF and AL contents were analyzed by HPLC according to the usual method. When these analytical values were compared with the results of analysis using an antibody (ELISA), both showed very good agreement. From this result, it was revealed that the method for analyzing the PF and AL contents, which are the active substances of the peony, developed this time is highly reliable, and has high sensitivity and good reproducibility.
Figure 2004091454

[Brief description of the drawings]
FIG. 1 is a mardimas spectrograph in which the number of haptens of the antigen of Example was investigated.
FIG. 2 is a semilogarithmic graph showing a calibration curve of an antibody C31B9 of an example.
FIG. 3 is a structural formula of paeoniflorin and related compounds.

Claims (4)

ペオニフロリン(PF)及び関連化合物に対する抗体。Antibodies to paeoniflorin (PF) and related compounds. 前記PF及び関連化合物はPF,アルビフロリン,オキシペオニフロリン,ベンゾイルペオニフロリンである請求項1に記載の抗体。The antibody according to claim 1, wherein the PF and the related compound are PF, albiflorin, oxypeoniflorin, and benzoylpeoniflorin. PFを構成する糖の一部を切断し,切断された末端をタンパク質と共有結合させたものを抗原ととして抗体を作成する抗体の製造方法。A method for producing an antibody, in which a part of the sugar constituting PF is cleaved, and the cleaved end is covalently bonded to a protein to prepare an antibody using the antigen as an antigen. タンパク質と共有結合したPF関連化合物を吸着させたウエルにPF関連化合物溶液を添加し,更に請求項1に記載の抗体を加えてインキュベートした後にウエルを洗浄し,標識化免疫定量法を用いてPF関連化合物溶液中のPF関連化合物を定量する抗体を用いた抗原の定量方法。A solution containing a PF-related compound is added to the well on which the PF-related compound covalently bonded to the protein is adsorbed, and the antibody according to claim 1 is further added thereto. A method for quantifying an antigen using an antibody for quantifying a PF-related compound in a related compound solution.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108169481A (en) * 2017-07-27 2018-06-15 数字本草中医药检测有限公司 A kind of test strips for detecting Paeoniflorin and its preparation method and application
CN112462071A (en) * 2020-11-13 2021-03-09 北京元恩生物技术有限公司 Special enzyme-linked immunoassay kit for ribavirin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108169481A (en) * 2017-07-27 2018-06-15 数字本草中医药检测有限公司 A kind of test strips for detecting Paeoniflorin and its preparation method and application
CN112462071A (en) * 2020-11-13 2021-03-09 北京元恩生物技术有限公司 Special enzyme-linked immunoassay kit for ribavirin

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