EP0264376A1 - Conjugues de proteines d'alcaloides de bis-indole, alcaloides de bis-indole, leur preparation et leur application - Google Patents

Conjugues de proteines d'alcaloides de bis-indole, alcaloides de bis-indole, leur preparation et leur application

Info

Publication number
EP0264376A1
EP0264376A1 EP86904190A EP86904190A EP0264376A1 EP 0264376 A1 EP0264376 A1 EP 0264376A1 EP 86904190 A EP86904190 A EP 86904190A EP 86904190 A EP86904190 A EP 86904190A EP 0264376 A1 EP0264376 A1 EP 0264376A1
Authority
EP
European Patent Office
Prior art keywords
bis
group
protein
indole
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86904190A
Other languages
German (de)
English (en)
Inventor
Aarre Huhtikangas
Seppo Lapinjoki
Jarmo Niemi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huhtamaki Oyj
Original Assignee
Huhtamaki Oyj
Huhtamaki Yhtyma OY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI852785A external-priority patent/FI80703C/fi
Application filed by Huhtamaki Oyj, Huhtamaki Yhtyma OY filed Critical Huhtamaki Oyj
Publication of EP0264376A1 publication Critical patent/EP0264376A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D519/00—Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00
    • C07D519/04—Dimeric indole alkaloids, e.g. vincaleucoblastine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
    • A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
    • A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
    • A61K47/6801—Drug-antibody or immunoglobulin conjugates defined by the pharmacologically or therapeutically active agent
    • A61K47/6803—Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates
    • A61K47/6805—Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates the drug being a vinca alkaloid

Definitions

  • the present invention relates to protein conjugates of bis-indole alkaloids and their preparation as well as application.
  • the invention also relates to bis-indole alkaloids which are particularly useful when producing the above protein conjugates.
  • immunotoxines are conjugates wherein a specific carrier protein, which is generally but not necessarily an antibody, is provided with a toxic component, such as a vegetable- or microbe-based proteintoxin, anti- neoplastic drug or radioactive agent (Hofstaetter, Gronski and Seiler, "Immunotoxines - Theoretical and Practical Aspects", Behring Inst. Mitt. No. 74 (1984) 113 - 121).
  • a toxic component such as a vegetable- or microbe-based proteintoxin, anti- neoplastic drug or radioactive agent
  • the carrier segment must be a protein that is capable of binding itself specifically to such surface structures of an animal cell which are characteristic of a target cell, i.e. the cells of a cell population to be destroyed.
  • a protein is especially an antibody molecule produced against the above type of surface structures.
  • Said antibody can in principle be prepared with prior known methods by immunizing an animal with a purified antigen, the above type of surface structure thus acting as such antigen.
  • the above type of antibody can be ⁇ produced by applying conventional hybridoma technique.
  • This technique which has been described e.g. in "Monoclonal Hybridoma Antibodies:- Techniques and Applications", editor Murrell, J.G.R., publisher CRC Press. Inc., Boca Raton, Florida, 1982, makes antibody production possible also against unpurified surface structures of target cells (e.g. pages 151 - 168 of this work). It is also known that, instead of a whole antibody molecule, it is possible to use such fragments thereof that have the molecule segment binding to an antigen, such as proteolytically producible fragments Fab and (Fab) 2 .
  • the carrier can also be some other protein having a property of binding itself selectively to target cells.
  • the Patent application GB 2 116 979 describes the conjugates of transferrine or ceruloplasmine with antitu ⁇ nor drugs, said conjugates being useful in the treatment of cancer diseases since transferrine receptors are abundant in cancer cells.
  • the target cells may be cancer cells but, as pointed out in the article "Ex-vivo treatment of donor bone marrow with anti-T-cell immunotoxins for prevention of graftversus-host disease", Filipovich et al. The Lancet, March 3, 1984, pages 469 - 471, also an immunotoxin directed at a normal cell system is useful whenever the treatment of a disease (or in this particular case: contraception) requires selective destruction of a cell population in question.
  • the Patent application GB 2 137 210 discloses immunoglobuline conjugates of vinca alkaloids wherein, however, a vinca- or bis-indole alkaloid is bound to a protein, in this case to an immunoglobulin, with an ester bond at the point of a vindoline unit, designated hereinafter with R 2 .
  • R 2 a vindoline unit
  • the method of conjugation described in the Patent application GB 2 137 210 must be considered unfavourable since a large-sized protein segment prevents sterically the medical activity of an alkaloid.
  • What is described in this invention is a method of conjugating bis-indole alkaloids to a protein in a manner that leaves free the fragments which have the greatest effect on the activity of an alkaloid molecule.
  • Bis-indole alkaloids some of which are vegetable-based natural molecules and some synthetically derived therefrom, have proved to be so-called cytostats suitable for medical destruction of cancer cells.
  • a compound of the invention is characterized in that formula (I) of the conjugate is
  • Ar-N N-bisindole alkaloid (I) wherein Ar is a benzoe- or arylalkylcarboxylic acid group which contains a protein group.
  • A represents a lower C 1 -C 5 alkylene group and B represents a lower C 1 -C 5 alkylene or alkylenyl group which can be substituted with a hydroxy group and/or a lower alkyl group and Ar represents a group having a formula
  • n is 0 - 5 , which alkylene chain can be substituted and T represents a protein group, such as gluco- protein, immunoglucoprotein or enzyme.
  • the available high specificity is useful in the analysis e.g. in a manner that possible metabolic products in medicines or sideproducts in production do not disturb the assay.
  • Bis-indole alkaloids consist of vindoline and catharanthine units, wherein the indolic part of a catharanthine unit offers a possibility of conjugating a protein group to an aromatic six-member ring in question by using an electrophile aromatic substitution reaction.
  • the protein group relates generally to protein, glycoprotein, e.g. enzyme, albumin, human or animal serum albumin and particularly to immunoglobulinor the like. Since the reactions of protein chemistry occur in aqueous solution, it will be appropriate here to use a diazo coupling with a diazonium salt to which a protein in the formation of a final immunogen can be covalencely bonded as a reaction step performed either prior to or after the diazo coupling.
  • the present vindoline and catharanthine units are both provided with an aromatic six-member ring for diazo coupling.
  • the most active part of the ring is not free for this purpose as that is exactly where the catharanthine unit is attached with a covalence link.
  • the second most reactive carbon atom of said ring is in view of a diazo coupling in a sterically cramped area.
  • the aromatic six-member ring of the catharanthine unit there are in principle 4 carbon atoms available for diazo coupling.
  • a difficulty in the reaction is a tendency of the diazonium ion to react with water molecules. If diazo coupling is slow due to unfavourable reaction conditions, the last-mentioned side reaction, phenol formation, will become the main reaction. Thus, a phenolic compound in question may also be diazo coupled whereby, in addition to a desired diazo compound, there is formed a contamination compound produced by said side reaction.
  • Reaction conditions in which the above alkaloid structure is diazo coupled as quickly as possible and, at the same time, the side reactions remain as few as possible require adjustment of the acidity of the reaction solution. Also, the solution must not be so alkaline that the diazonium ion concentration goes down too much but neither should the solution be so acidic that the concentration of non-protonated amine (indolic part of the catharanthine unit) remains too low.
  • the pH- value of the reaction solution must be adjusted within the range of pH 6,60 to pH 6,90 for producing an immunogen that is sufficiently uniform and able to measure specifically and separately bis-indole alkaloids for satisfying the requirements of ELISA assay procedure.
  • Antibody can be produced by means of the ixnmunosystem of a test animal immunizing the animal with the above conjugate as immunogen and by collecting the antibody from blood circulation.
  • the anibody can be purified, if necessary, by using conventional and appropriate techniques.
  • the analysis is based on a binding reaction between the above antibody and a bis-indole alkaloid to be analysed.
  • the amount of a binding analysate is determined by means of a competing binding tracer.
  • the tracer can be a corresponding commercial compound labelled with a radioactive isotope or a corresponding compound conjugated to a measurable enzyme. Radioactivity and enzymatic activity can be measured by conventional equipment marketed for these purposes. This principle is described in publication Voller et al. Bull. Wild. Hlth. Org. (1979) 53, 55-56.
  • a radioimmuno- metric method works with a trithionated tracer within a concentration range of 0,1 to 50 ng, is highly -specific on a target material and fulfils the criteria generally accepted for the reproducibility of corresponding methods.
  • the method has been found applicable in the assays of the vincristine concentration of plasma.
  • EIA enzyme-immunoanalytical method
  • the performance of a RIA analysis sequence takes appr. two days during which one person can perform appr. 200 analyses. Respectively, the duration of an EIA sequence is appr. eight hours, including appr. 500 samples. The speed and capacity of both assays can be improved significantly if they are developed into a so-called laboratorium kit in which the final laboratorium work phases are minimized and conditions accurately optimized.
  • the protein conjugates of formula (I) according to the invention can as a protein group contain a protein binding specifically to the surface structures of an animal or human cell, an antibody produced against individual structures or an anti- body which is monoclonal and prepared by using hybridoma technique.
  • the antibody can be typical or specific to cancer cells.
  • aminophenylalanine is dissolved in 5 ml of water. To this solution is added 50 mg of bovine serum albumin and 50 mg of 1-ethyl-3-(3-dimethylaminopropyl) carbbdeimide (EDC) and the mixture is incubated overnight at room temperature.
  • bovine serum albumin 50 mg
  • EDC 1-ethyl-3-(3-dimethylaminopropyl) carbbdeimide
  • Reaction product is separated from reagents by dialysing (ultrafiltration) at +4 against water.
  • the solution pH is adjusted to 1,5 with hydrochloric acid in ice bath.
  • 100 mg of NaNO 2 is dissolved in 1 ml of water and added dropwise to the hydrochloric acid solution to which is further added 50 mg of ammoniumamidosulphonate dissolved in 1 ml of water.
  • 15 mg of bis-indole alkaloid (vincristine) is dissolved in the minimum volume (1 - 2 ml) of a borate buffer, pH 6 (0,1 M Na-borate solution whose pH adjusted with 1 M HCl).
  • the bis-indole alkaloid was vincristine but the method can be effected also with other alkaloids mentioned in the specification, such as vinblastine, vindesine or vinzolidine.
  • the above prepared acid solution is added dropwise to a vincristine solution. During the addition, pH is monitored and kept at approx. 7 by means of 0,1 M Na-borate (forming yellow colour). Reaction is allowed to proceed for 3 to 4 hours in darkness followed by adding 3 mg of protein to the solution (solution pH approx. 6).
  • 1-ethyl- 3-(3-dimethylaminopropyl)-carbodeimide (4 mg) dissolved in the minimum volume of water is added to an enzyme solution and reaction is allowed to proceed overnight at +4°C.
  • the end product is separated from reagents by ultrafiltration at +4oC against a suitable buffer (e.g. a phosphate-buffered physiological salt solution).
  • a suitable buffer e.g. a phosphate-buffered physiological salt solution.

Landscapes

  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Medicinal Chemistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Immunology (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

Conjugués de protéines d'alcaloïdes de bis-indoles de formule (I) Ar-N=N-alcaloïde de bis-indoles où Ar est un acide benzoe- ou arylalkylcarboxylique contenant un groupe protéique. L'invention se rapporte également à un procédé de préparation d'un conjugué de protéines alcaloïdes de bis-indoles de formule (I), dans lequel procédé on provoque la réaction entre le conjugué et un dérivé acide de diazonium de formule Ar-N=N(+), où Ar représente le même composé que ci-dessus à l'exception, toutefois, que Ar peut ne pas contenir de groupes protéiques, un groupe protéique étant lié dans ce cas à un groupe acide aromatique. L'invention se rapporte également à un dérivé d'un alcaloïde de bis-indoles de formule Ar1-N=N-alcaloïde de bis-indoles où Ar1 représente un groupe d'acide benzoe- ou arylalkylcarboxylique. Ce dérivé est un composé utile dans la préparation des conjugués de formule (I). Est également décrite l'utilisation des conjugués de formule (I) dans des procédés immunométriques et dans le traitement de maladies, notamment du cancer.
EP86904190A 1985-07-16 1986-07-04 Conjugues de proteines d'alcaloides de bis-indole, alcaloides de bis-indole, leur preparation et leur application Withdrawn EP0264376A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI852785A FI80703C (fi) 1985-07-16 1985-07-16 Bis-indolalkaloiders proteinkonjugat, deras framstaellning och anvaendning.
FI852785 1985-07-16
FI860456A FI860456A (fi) 1985-07-16 1986-01-31 Bis-indolalkaloiders proteinkonjugat, bis-indolalkaloider, deras framstaellning och anvaendning.
FI860456 1986-01-31

Publications (1)

Publication Number Publication Date
EP0264376A1 true EP0264376A1 (fr) 1988-04-27

Family

ID=26157788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86904190A Withdrawn EP0264376A1 (fr) 1985-07-16 1986-07-04 Conjugues de proteines d'alcaloides de bis-indole, alcaloides de bis-indole, leur preparation et leur application

Country Status (5)

Country Link
EP (1) EP0264376A1 (fr)
AU (1) AU6135586A (fr)
DK (1) DK132787D0 (fr)
FI (1) FI860456A (fr)
WO (1) WO1987000530A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1364925A (en) * 1970-11-16 1974-08-29 Gross S J Immunochemical assaying for tetrahydrocannabinol and materials therefor
US3809782A (en) * 1972-03-10 1974-05-07 Hoffmann La Roche Tubocurarine antigens and antibodies specific therefor
OA06421A (fr) * 1980-06-10 1981-09-30 Omnium Chimique Sa Procédé de préparation de dérivés N-(vinblastinoyl-23) d'acides aminés et de peptides.
FI820020L (fi) * 1981-01-12 1982-07-13 Lilly Industries Ltd Immunoglobulinkonjugater
DE3482444D1 (de) * 1983-03-30 1990-07-19 Lilly Industries Ltd Immunoglobulinkonjugate.
US4522750A (en) * 1984-02-21 1985-06-11 Eli Lilly And Company Cytotoxic compositions of transferrin coupled to vinca alkaloids

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8700530A1 *

Also Published As

Publication number Publication date
DK132787A (da) 1987-03-16
FI860456A (fi) 1987-01-17
AU6135586A (en) 1987-02-10
WO1987000530A1 (fr) 1987-01-29
FI860456A0 (fi) 1986-01-31
DK132787D0 (da) 1987-03-16

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Inventor name: NIEMI, JARMO

Inventor name: HUHTIKANGAS, AARRE

Inventor name: LAPINJOKI, SEPPO