EP1309611A1 - Antiheparinpeptide - Google Patents

Antiheparinpeptide

Info

Publication number
EP1309611A1
EP1309611A1 EP01965326A EP01965326A EP1309611A1 EP 1309611 A1 EP1309611 A1 EP 1309611A1 EP 01965326 A EP01965326 A EP 01965326A EP 01965326 A EP01965326 A EP 01965326A EP 1309611 A1 EP1309611 A1 EP 1309611A1
Authority
EP
European Patent Office
Prior art keywords
heparin
aha
compound according
reagent
carboxylic acid
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Withdrawn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
EP01965326A
Other languages
English (en)
French (fr)
Inventor
Gérard Quentin
Florence Laur
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.)
Diagnostica Stago SAS
Original Assignee
Diagnostica Stago SAS
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
Application filed by Diagnostica Stago SAS filed Critical Diagnostica Stago SAS
Publication of EP1309611A1 publication Critical patent/EP1309611A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K7/00—Peptides having 5 to 20 amino acids in a fully defined sequence; Derivatives thereof
    • C07K7/02—Linear peptides containing at least one abnormal peptide link
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/02—Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/04—Antihaemorrhagics; Procoagulants; Haemostatic agents; Antifibrinolytic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides

Definitions

  • the present invention relates to a compound exhibiting anti-heparin activity, of the formula Z - B m - (AXA) X - B overwhelm- (AXA) y - B 0 - (AXA) Z - B p , the diagnostic reagents the comprising and the use of said compound in an in vitro diagnostic test or for the manufacture of a drug for anti-heparin purposes.
  • Unfractionated heparin is a natural sulfated polysaccharide, from the glycosaminoglycan family. It is mainly extracted from the intestinal mucosa of pork or beef.
  • the ionic charge of the molecule is also heterogeneous: different degree of sulfation of glucosamine sulfate units and number of different carboxylic functions at the level of iduronic and glucuronic acid units [1, 2].
  • heparin The essential physical characteristics of heparin are: its polyanionicity and its high charge density. Indeed, each disaccharide carries 3 to 4 negative charges (sulfates and carboxylates).
  • a particular arrangement of the different heparin units forms the pentasaccharide in a reproducible manner throughout the sequence.
  • This pentasaccharide is known as the site of recognition of heparin for antithrombin III, generating between these two entities a strong affinity and consequently a high anticoagulant activity [3].
  • Unfractionated heparin is a polydisperse macromolecule: commercial preparations based on NHF have a molecular weight between 12,000 and 18,000 Da.
  • the NHF has an equivalent activity on factors lia and Xa.
  • LMWHs keep a high anti-Xa activity and an anti- ⁇ a activity which decreases with the size of the LMWH molecule.
  • LMWHs can be advantageously used as an anticoagulant instead of UFHs.
  • heparins HNF or LMWH in therapy may require the administration of compounds neutralizing their anti-coagulant effects, in particular at the end of interventions on the circulatory system, such as for example the extra-corporal circulation.
  • the presence of heparin in the samples can lead to erroneous interpretations of the results. It is therefore necessary to also have compounds with anti-heparin properties for the diagnosis.
  • Protamine sulfate is the only known compound capable of neutralizing the anti-coagulant effects of heparin in vivo.
  • Protamine belongs to the family of basic proteins rich in arginine residues, is purified from salmon sperm [6 - 7] and neutralizes heparin thanks to its positive charges [8 - 10].
  • protamine causes hemodynamic and hematological side effects such as hypotension, bradycardia, thrombocytopenia and leukopenia [11 - 15].
  • the positive charges of protamine are directly proportional to the neutralization efficiency of heparin, but also to the toxicity of the molecule [16].
  • Poly L-Lysine and Polybrene are other compounds known to neutralize heparin. However, these polycations also appear too toxic for clinical use.
  • Wakefield et al. (WO 95/13083) describe variants of the protamine which would be less toxic. These are peptides having a sequence of 20 to 40 amino acids, with a positive charge between +14 and +18 and the structure of which corresponds to clusters of positive residues interspersed with neutral amino acids. Harris et al. (EP 999219) describe linear or branched anti-heparin peptides comprising a succession of clusters of Arginine and Alanine.
  • the present invention relates to new synthetic molecules useful as agents neutralizing heparin.
  • the properties of the molecules of the present invention have been more particularly studied in in vitro diagnostic reagents.
  • heparin which may be present in the blood samples tested
  • the molecules whose general formula 1 is explained below make it possible to meet these two criteria. They therefore prove to be particularly useful for neutralizing any interference linked to the presence of heparin for both diagnostic and therapeutic purposes.
  • the present invention relates to a compound exhibiting antiheparin activity, of general formula 1 below:
  • * B represents a basic amino acid and can be advantageously selected from Lysine, Arginine, Ornithine, Histidine, Homolysine, Homoarginine; m, n, o and p independently of one another represent an integer between 2 and 4. Among the preferred compounds of the invention, there are more particularly the compounds in which m, n, o are equal to 4 and p equal to 2.
  • AXA represents a hydrocarbon chain corresponding to the formula:
  • n being an integer between 2 and 6; x, y and z independently of one another represent an integer between 1 and 6.
  • Z is selected from the following compounds:
  • Z is pyroglutamic acid (PGIu).
  • AHA corresponds to NH - (CH 2 ) 5 - CO - that is to say amino hexanoic acid, with x equal to 2 and y, z equal to 1.
  • the invention relates to the compound corresponding to the following formula: PGIu -, - (AHA) 2 - K "- AHA - I - AHA - K 2
  • the compounds described above have an anti-heparin power, determined by the ⁇ relative coagulation time between a heparin plasma and a non-heparinized plasma, less than 10%, preferably less than 5%.
  • the present invention therefore also relates to the use of a compound corresponding to formula 1 indicated above in an in vitro diagnostic reagent, in particular the reagents for calculating the coagulation time of a blood sample or the detection or determination of different elements of the coagulation cascade, regardless of the presence or absence of heparin in said sample.
  • Said reagents in particular reagents of the TP (prothrombin time) type, advantageously have a turbidity measured by an OD at 630 nm, less than 0.5, preferably less than 0.1.
  • the invention relates to an in vitro diagnostic reagent comprising a compound as defined by general formula 1 above, preferably a compound in which AXA corresponds to NH - (CH 2 ) 5 - CO - c 'is to say amino hexanoic acid, with x equal to 2 and y, z equal to 1, and more preferably the compound below of formula:
  • Such a diagnostic reagent thus makes it possible to carry out tests or assays in blood samples, regardless of the presence or absence of heparin in said samples.
  • a reagent according to the invention advantageously corresponds to conventional coagulation tests, that is to say tests making it possible to determine the coagulation time of a blood sample or tests allowing the detection or the assay of different elements of the cascade of coagulation, such as the assay of factor Vlla, fibrinogen, proteins C and S, the TP test. These tests are commonly used by those skilled in the art.
  • a preferred in vitro diagnostic reagent according to the invention is a reagent comprising Thromboplastin, making it possible to carry out a TP test (Prothrombin time or Quick time)
  • the final concentration in such reagents of the compound according to the invention defined above is advantageously between 2 and 10 ⁇ g / ml. Preferably this concentration is 5 ⁇ g / ml.
  • the invention also relates to the use of a compound of general formula 1 defined above, as an anti-heparin agent for the preparation of a medicament.
  • the synoptic table of figure 1 summarizes the various stages of the synthesis.
  • the structural sequence is synthesized by chemistry on solid support, using an appropriate automaton (Applied Biosystems 433A).
  • hydrophobic spacer arms (AXA) were added in double coupling.
  • the resin used is an MBHA resin (methyl benzydrylamine), so as to recover a neutral amide C-terminal structure after cleavage of the resin.
  • the chemistry used here is an Fmoc chemistry, using piperidine deprotection at each step.
  • the synthesis scale on the synthesizer is 0.1 nmole, leading to approximately 100 mg of crude product.
  • the product is cleaved from the resin and deprotected on the side chains by a treatment with TFA (55% trifluoroacetic acid). After concentrating the cleavage solution by 2/3 of the volume, the product is precipitated from ether.
  • the crude product is then lyophilized and then purified by reverse phase HPLC, using a Cl 8 Kromasil 5 ⁇ m column (20 mm * 250 mm) with a water / acetonitrile gradient 0.1% of TFA (from 0 to 60% acetonitrile in 30 min at 15 ml / minute). The detection is made at 214 nm and the fractions are collected manually. The quantity of purified product recovered is 50 mg.
  • the structure of the final product is confirmed by analysis of the sequence after hydrolysis with HCl 6N, 120 ° C, 24h; the hydrolyzate is then analyzed by reverse phase HPLC (Kromasil Cl 8 column, 5 ⁇ m, 250 mm * 4.6 mm), after derivatization with PITC (phenylthioisocyanate).
  • Example 2 Test of anti-heparin agents according to the invention on a TP test:
  • the objective is to analyze the performances (anti-heparin power and turbidity) of anti-heparin agents incorporated in a Thromboplastin Diagnostica Stago reagent.
  • the samples to be tested are prepared from a pool of normal plasma overloaded or not with heparin (heparin plasma at 1 IU / ml in HNF (Calciparin 25,000 IU / ml, Sanofi)).
  • a reagent serving as a negative control that is to say without an anti-heparin agent, is useful for checking the heparinization of the plasma.
  • the automaton takes 50 ⁇ l of sample plasma, which it incubates 240 sec. at 37 ° C in a cup containing a ball; then it transfers the well to the measurement zone and adds 100 ⁇ l of Thromboplastin reagent to the sample.
  • the coagulation time is determined as follows:
  • the anti-heparin power is calculated as follows: determination of the relative time delta between a heparin and non-heparin plasma, that is to say:
  • the turbidity must be as low as possible for a diagnostic application and more particularly in a Thromboplastin (TP) test.
  • This turbidity is determined with the measurement of the OD at 630 nm on a spectrophotometer (Uvikon 940, Kontron).
  • a reagent serving as a negative control that is to say without an anti-heparin agent, is useful for measuring the influence of this anti-heparin agent on the turbidity of the reagent.
  • Example 3 Analysis of the performances (anti-heparin power and turbidity) of different anti-heparin agents according to the invention, introduced into a reagent of the Thromboplastin type (results compared with the control (C) having no anti-heparin agent) :

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • Hematology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Diabetes (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biophysics (AREA)
  • Genetics & Genomics (AREA)
  • Molecular Biology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Peptides Or Proteins (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
EP01965326A 2000-08-17 2001-08-14 Antiheparinpeptide Withdrawn EP1309611A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0010682A FR2813080B1 (fr) 2000-08-17 2000-08-17 Peptides anti-heparine
FR0010682 2000-08-17
PCT/FR2001/002610 WO2002014353A1 (fr) 2000-08-17 2001-08-14 Peptides anti-heparine

Publications (1)

Publication Number Publication Date
EP1309611A1 true EP1309611A1 (de) 2003-05-14

Family

ID=8853565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01965326A Withdrawn EP1309611A1 (de) 2000-08-17 2001-08-14 Antiheparinpeptide

Country Status (6)

Country Link
US (1) US6835808B2 (de)
EP (1) EP1309611A1 (de)
JP (1) JP2004506651A (de)
CN (1) CN1447818A (de)
FR (1) FR2813080B1 (de)
WO (1) WO2002014353A1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7915223B2 (en) * 2004-09-27 2011-03-29 Technion Research & Development Foundation Ltd. Antimicrobial agents
WO2006035431A2 (en) * 2004-09-27 2006-04-06 Technion Research & Development Foundation Ltd. Fatty acid modified polylysines as antimicrobial agents
US20090092574A1 (en) 2006-12-29 2009-04-09 Scott Richard W Ophthalmic And Otic Compositions Of Facially Amphiphilic Polymers And Oligomers And Uses Thereof
EP2142257A2 (de) * 2007-04-30 2010-01-13 Technion Research & Development Foundation Ltd. Polymer-mittel gegen krebs
WO2008132737A1 (en) * 2007-04-30 2008-11-06 Technion Research & Development Foundation Ltd. Novel antimicrobial agents
US8278309B2 (en) * 2008-10-27 2012-10-02 Polymedix, Inc. Synthetic mimetics of host defense and uses thereof
RU2012133562A (ru) * 2010-01-07 2014-02-20 Полимедикс Инк. Антигепариновые соединения
RU2606128C2 (ru) 2011-05-16 2017-01-10 Селлсьютикс Корпорейшн Соединения для применения в лечении мукозита
CN103739674A (zh) * 2013-04-01 2014-04-23 中国人民解放军军事医学科学院野战输血研究所 系列低分子鱼精蛋白模拟肽及其应用
GB201400292D0 (en) 2014-01-08 2014-02-26 Haemostatix Ltd Peptide dendrimers and agents
GB201508014D0 (en) * 2015-05-11 2015-06-24 Haemostatix Ltd Haemostatic device
GB201508024D0 (en) * 2015-05-11 2015-06-24 Haemostatix Ltd Haemostatic compositions
US11771694B2 (en) 2020-06-05 2023-10-03 Innovation Pharmaceuticals Inc. Arylamide compounds for treatment and prevention of viral infections

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2634020B2 (fr) 1987-12-30 1991-02-22 Serbio Cuvette pour analyseur biologique
US5614494A (en) * 1993-11-12 1997-03-25 University Of Michigan, The Board Of Regents Acting For And On Behalf Of Peptides for heparin and low molecular weight heparin anticoagulation reversal
US5877153A (en) * 1996-06-11 1999-03-02 Commonwealth Biotechnologies Inc. Heparin-binding peptides
US6200955B1 (en) 1996-06-11 2001-03-13 Commonwealth Biotechnologies, Inc. Heparin binding peptides

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO0214353A1 *

Also Published As

Publication number Publication date
FR2813080A1 (fr) 2002-02-22
JP2004506651A (ja) 2004-03-04
CN1447818A (zh) 2003-10-08
WO2002014353A1 (fr) 2002-02-21
FR2813080B1 (fr) 2002-11-29
US6835808B2 (en) 2004-12-28
US20030171539A1 (en) 2003-09-11

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