WO2002016574A2 - Method for identifying peptides that can be specifically cleaved and the use of peptide sequences of this type - Google Patents
Method for identifying peptides that can be specifically cleaved and the use of peptide sequences of this type Download PDFInfo
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- WO2002016574A2 WO2002016574A2 PCT/EP2001/009102 EP0109102W WO0216574A2 WO 2002016574 A2 WO2002016574 A2 WO 2002016574A2 EP 0109102 W EP0109102 W EP 0109102W WO 0216574 A2 WO0216574 A2 WO 0216574A2
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/34—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving hydrolase
- C12Q1/37—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving hydrolase involving peptidase or proteinase
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/18—Drugs for disorders of the alimentary tract or the digestive system for pancreatic disorders, e.g. pancreatic enzymes
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
- A61P19/10—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease for osteoporosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/14—Antivirals for RNA viruses
- A61P31/16—Antivirals for RNA viruses for influenza or rhinoviruses
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P33/00—Antiparasitic agents
- A61P33/10—Anthelmintics
- A61P33/12—Schistosomicides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/12—Antihypertensives
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6803—General methods of protein analysis not limited to specific proteins or families of proteins
- G01N33/6818—Sequencing of polypeptides
Definitions
- the invention relates to methods for finding and identifying specifically cleavable peptides with a defined amino acid sequence using proteolytically acting solutions and the use of these peptides for the targeted release of chemical active substances and for diagnosis.
- a method for the detection of specifically cleaved peptides using a specific protein construct which fluoresces upon proteolytic cleavage of the construct is described in US Pat. No. 5981200.
- the method is based on the fluorescence resonance energy technique (FRET).
- FRET fluorescence resonance energy technique
- An advantage of this method is that it can also be used for the in vivo detection of protein cleavage events.
- FRET fluorescence resonance energy technique
- Proteins an exact assignment of the cleavage event to the respective sequence would be associated with great effort.
- Another disadvantage of this method is that relatively large amounts of labeled substrates have to be used in order to obtain a detectable signal.
- phage display Another method that can be used for the selective identification of enzyme substrates is the phage display (eg laid down in WO 97/47314).
- a disadvantage of this method is that the phage display peptide libraries have a smaller number of possible different sequences than other surface-represented peptide libraries and that the subsequent one
- the object of the present invention is to develop a method for finding and identifying specifically proteolytically cleavable peptides and to provide substances which allow a targeted release of chemical active substances.
- the object is achieved by a method for identifying specifically proteolytically cleavable peptides, which comprises the following method steps: a) incubation of a library of fusion molecules containing a peptide and a nucleic acid encoding the peptide with a proteolytically active sample, b) isolation of the proteolytically cleaved components the fusion molecules, c) determining the sequence of the nucleic acid component of the isolated
- the method according to the invention is based on the use of fusion molecules which have a phenotypic peptide part and a genotypic part
- nucleic acid part which has a sequence coding the peptide part.
- the peptide part is linked to the nucleic acid part via a suitable linker.
- a protein acceptor e.g. B. Puromycin used, which is covalently bound to the nucleic acid part.
- the linker can contain other components such as e.g. B. include a non-coding nucleic acid sequence, preferably a poly-A sequence.
- the nucleic acid part contains further regions which are constant in sequence and which lie on one or both sides of the coding region. These constant nucleic acid regions can e.g. B. serve as primer binding sites for performing a PCR or as restriction enzyme interfaces.
- the nucleic acid part of the fusion molecules contains a variable part which codes for at least two amino acids, preferably for at least four, particularly preferably for seven to twelve amino acids. For this purpose, further constant coding nucleotide sequences can occur.
- the constant nucleic acid sequences can encode peptide sections which e.g. B. allow a simple fixation of the peptide part of the fusion molecule to a solid surface or generate the interesting structural elements. Such structural elements are e.g. B. epitopes for antibodies, tags for cleaning or for the detection of the constructs or elements that determine certain tertiary structures.
- the preparation of such fusion molecules can, for. B. according to WO98 / 31700.
- a system is described there in which a protein acceptor, for example a puromycin, is bound to the nucleic acid, preferably RNA, via a suitable linker.
- a protein acceptor for example a puromycin
- the synthesized protein can be covalently bound to its coding RNA and thus characterized in more detail.
- Comparable systems that can be used for the present invention are described, for example, in DE19646372C1, WO98 / 16636, US 5843701 or WO94 / 13623.
- the fusion molecules are fixed to a surface (support) via their peptide part.
- carrier is understood to mean material which is in solid or gel-like form. Examples of suitable carrier materials are ceramic, metal, in particular semiconductors, noble metal,
- Glasses, plastics, crystalline materials or thin layers of the carrier in particular the materials mentioned, or (bio) molecular filaments such as cellulose, framework proteins. Not only flat materials but also particles come into question as carriers, such as e.g. B. protein-loaded materials for column chromatography or beads made of organic polymers.
- the carrier is generally covalent, quasi-covalent, supramolecular or physical.
- the peptide part of the fusion molecules can e.g. B. via biotin - streptavidin bond to the support, but also specific domains of the peptide part of the fusion molecules, such as. B. metal-binding domains (z. B. His-Tag), terminals
- Cysteine residues or domains that contain epitopes recognizable by specific antibodies can mediate such a fixation.
- Preferred in the method according to the invention are libraries whose fusion molecules have all possible permutations with regard to the variable part of the
- Recognition sequence of at least four amino acids are preferred libraries with a variable peptide part of at least four amino acids are preferred.
- the library of fusion molecules is exposed to a proteolytically active sample either in solution or preferably fixed to a support.
- Extracts in question are extracts from pathological tissue, such as. B. from carcinomas.
- extracts which represent all or part of the proteolytic activity of an organism in particular viruses, microorganisms such as bacteria or protists, can also be used.
- Known protease solutions can also be used as a proteolytically active sample, preliminary sample or comparative sample.
- the library is incubated with the proteolytically active sample preferably under physiological conditions, preferably at temperatures between 0 ° C. and 45 ° C.
- the extracts to be examined for their proteolytic activity can be used directly, or the extracts are in a suitable solvent, such as. B. a physiological saline solution and used for incubation.
- Fusion molecules cleaved by the proteases contained in the sample.
- the result is a specific proteolytic cleavage pattern that is characteristic of the sample extract used.
- the split-off parts of the fusion molecules are encoded by the nucleic acid part.
- proteolytically cleaved fusion molecule parts are isolated and the sample
- the isolation of the cut fusion proteins after incubation of the library and proteolytically active extract in solution can be carried out as follows.
- a constant structural feature e.g. a known epitope for an antibody, in which that part of the peptide is used which is no longer connected to the rest of the fusion molecule, including the nucleic acid part, by the proteolytic cleavage.
- an affinity chromatography using z. B. said antibody The nucleic acid part of the cut fusion proteins cannot bind, is separated from the nucleic acids of the uncut fusion proteins, and is therefore in the
- Other structural features such as e.g. B. His-Tag or Strep-Tag can be used for separation.
- the fusion molecules remaining on the affinity matrix can be eluted and used further in solution or advantageously directly in the fixed state.
- the cut fusion proteins can be isolated using different methods after incubation of the fixed library with extract.
- the nucleic acid part of the cut fusion molecules is obtained directly in the eluate.
- the sequences of the cleaved peptides can be identified directly by PCR amplification of the nucleic acid parts of the cleaved fusion proteins contained in the eluate with subsequent cloning and sequencing.
- the sequence of the cleaved peptides can be carried out again by means of PCR, cloning and sequencing.
- a number of other chromatographic or electrophoretic methods for isolating the proteolytically cleaved fusion molecule parts are possible.
- the fusion molecules are marked or modified for easier identification.
- Magnetic labeling of the nucleic acid part of the fusion molecules is particularly preferred; it can also be used in conjunction with a fluorescent label or a radioactive label.
- the magnetic isolation of the split-off parts of the fusion molecule can be carried out very easily and selectively.
- the proteolytic pattern is evaluated e.g. B. via a
- Hybridization of the isolated nucleic acid sequences on a biochip as z. B. is available from Affymetrix or Nanogen. In this way, the isolated mixture of split-off fusion molecule parts containing different nucleic acid sequences can be analyzed directly.
- the proteolytically active sample can be processed mechanically as follows: If necessary, the entire tissue is cleaned by external washing in cold buffer (50 mM Tris-HCl, pH 7.5, 2 mM EDTA, 150 mM NaCl, 0.5 mM DTT ; Dignam, JD, Preparation of Extracts from Higher Eukaryotes. From: Deutscher, MP (ed.) Guide to Protein Purification. Methods in Enzymology, Vol 182, Academic Press, (1990). Page 194-202). The tissue is crushed in the cold buffer and, if necessary, components such as. B. connective tissue, skin, blood vessels removed. The tissue pieces can be homogenized with Kobayashi et al.
- Tissue homogenizer (see below) can be processed into a homogenate under ice cooling.
- the method must be adapted to the desired tissue type.
- Tissue homogenizers are e.g. E.g .: - Mixer: e.g. Liver can be easily made into porridge in a mixer, then rubbed through a tightly woven nylon net. It creates a fine one
- the homogenized tissue is mixed with further homogenization buffer and shaken at 4 - 8 ° C for up to 45 min. Then that will
- tissue is preferably pulverized with liquid nitrogen in a mortar with constant cooling and the powder freeze-dried in a lyophilizer overnight. The dry powder can then be used again.
- Comparative sample can be used.
- LP1 solution buffer 1
- the glass potter is used for less material.
- the homogenate can be centrifuged for 10 min at 1000 x g at 4 ° C. The supernatant is collected for further preparations.
- the centrifugate (nuclear pellet) is resuspended in 12 ml LP1 and centrifuged as before.
- the nuclear pellet is resuspended in LP2 (20mM Tris-HCl pH 7.5; 150mM NaCl, 1mM EDTA, 1mM EGTA, 1% NP-40).
- the collected supernatants can be used to isolate and purify a cytosolic fraction. They are centrifuged at 100,000 x g, 1 h, 4 ° C. The supernatant forms the extract containing cytosolic proteins.
- the pellet is made from the cytosolic
- the pellet from the membrane fraction separation is washed three times in LP2 and centrifuged at 100,000 x g, 1 h, 4 ° C. After the third washing step, the pellet is resuspended in LP3 (12.5 mM Tris-HCl pH 7.5; 0.4% SDS) and solubilized at 95 ° C. Final centrifugation at 20,800 x g, 15 min RT. The supernatant contains the
- z. B human cells or cell lines in the cell culture as a monolayer. The cells are washed three times with cell culture medium. The medium is then replaced by fresh medium. The secretory proteases are secreted into the medium at 37 ° C. The suitable secretion period is 1 to 3 hours. The same procedure can be used with tissue pieces or tissue sections. To obtain tissue fluid from tissue associations, for. B. organs or tissues are carefully shredded with scissors and scalpel. The
- tissue pieces are washed several times with tissue buffer.
- the tissue pieces or small organs are incubated in physiological buffer or medium at 37 ° C for 1-3 hours. After the incubation, the tissue pieces are left in one
- Sediment 15 ml pointed vessel the medium is removed and can be examined further.
- the tissues can be transferred to centrifugation tubes and gently centrifuged.
- the supernatant contains the proteases of the interstitial fluid from the spaces between the tissues.
- protein extracts can also be obtained by the following method: Comminution of the tissue in ice-cold RIPA buffer (50 mM Tris-HCl, pH 7.4; 1% NP-40, 0.25% sodium deoxycholate, 150 mM NaCI, 1 mM EGTA, 1 mM PMSF, 1 mM Na 3 VO 4 , 1 mM NaF and 1 ⁇ g / ml aprotonin, leupeptin and pepstatin), freeze the shredded tissue and then crush it. To homogenize the tissue, RIPA buffer is added in a volume ratio of 1 to 2 and the batch is then thawed. After 15 min the lysate is centrifuged at 13,000 xg, 4 ° C for 10 min. The lysate can be aliquoted, snap frozen and stored in liquid nitrogen.
- RIPA buffer 50 mM Tris-HCl, pH 7.4; 1% NP-40, 0.25% sodium deoxycholate, 150 mM NaCI,
- the proteolytic activity of an unknown sample compared to a comparison sample can be determined.
- the method for the differential determination of the proteolytic activity comprises the following steps: a) incubation of a library of fusion molecules, containing a peptide and a nucleic acid encoding the peptide, with a proteolytically active sample, b) incubation of the same library of fusion molecules in at least one parallel approach , with at least one proteolytically active comparison sample, c) isolation of the proteolytically cleaved components of the fusion molecules, d) creation of a differential nucleic acid bank e) determination of the sequence of the nucleic acids determined.
- the differential determination of the proteolytically cleaved nucleic acid parts of the fusion molecules can, for. B. by applying an excess single-stranded nucleic acid parts isolated from the comparison sample are carried out on a suitable support, saturation of the free binding sites of the support and subsequent hybridization with single-stranded nucleic acid parts isolated from the sample.
- the separable, non-hybridized nucleic acid parts represent only those cut in the sample
- the proteolytic activity of a sample against at least one pre-sample is determined.
- the differential proteolytic activity can be determined by successively incubating the fusion molecule library with the preliminary sample and sample.
- the method comprises the following process steps: a) incubation of a library of fusion molecules containing a peptide and a nucleic acid encoding the peptide with at least one proteolytically active preliminary sample, b) removal of the split-off components of the fusion molecules, c) incubation of the library thus prepared with a proteolytically active Sample, d) isolation of the proteolytically cleaved components of the fusion molecules, e) determination of the sequence of the nucleic acid component of the separated fusion molecules.
- nucleic acid parts of the proteolytically cleaved and isolated fusion molecule parts are reproduced by means of PCR.
- fusion molecules are used, the nucleic acid part of which is on both sides of the coding
- Nucleic acid sequence have constant nucleic acid sequences as primer binding sites.
- the isolated nucleic acid of the cleaved fusion proteins is preferably amplified by means of PCR and transcribed in vitro in the method according to the invention. Starting from the RNA produced in this way, methods described above are used again new library of fusion proteins was prepared and incubated with the same extract containing proteolytic activities. This cycle can be repeated several times.
- PCR, in vitro transcription and / or in vitro translation can be carried out in one or more of the described cycles with a higher than normal error rate. This increases the available peptide sequences to be tested (in vitro protein evolution).
- the variant of the directed in vitro protein evolution makes it possible to change known cleavage sequences quickly and easily in such a way that other kinetic properties with regard to the cutting proteases result.
- the proteolytically active sample can contain other additives, such as. B. specifically acting protease inhibitors or nuclease inhibitors or non-specific RNA and / or DNA to saturate possible nucleases.
- the sample extracts used contain non-specific cutting lysosomal or endosomal proteases (acidic peptidases, such as aspartate peptidases), the addition of one which acts specifically against these proteases is necessary
- Inhibitors such as B. the addition of pepstatin A, recommended.
- the specific inhibition of exoproteases can also be advantageous in order to prevent the breakdown of the proteins contained in the sample, comparative sample or preliminary sample, in particular those of other proteases and their peptide cofactors.
- the fixed fusion molecules themselves do not have to be protected against exoproteases, since there are no free N- or C-terminal peptide ends.
- the breakdown of the peptide portion of the proteolytically cleaved fusion molecules is irrelevant for the further course of the process.
- Nucleic acid parts of the fusion molecules can be obtained in the freshly prepared tissue homogenate already during tissue processing and the subsequent steps by treatment with RNAse or DNAse inhibitors.
- the nuclease inhibitors be covalently coupled to particles or suitable column materials. Nucleases that bind to surface-coupled nuclease inhibitors are thus separated from the remaining tissue homogenate.
- Nucleases is the protection of the nucleic acid content of the fusion molecules by auxiliary substances.
- the auxiliary substances surround the DNA and RNA, form a complex and thus protect them from nucleases (Katayose, S. (1998) J. Pharm. Sei., 87: 160-163).
- These auxiliaries are in particular polyethyleneimine or PEG-PLL, but can also be proteins or chaparones. Protection against nucleases is also conceivable by using artificial nucleic acids in the fusion molecule, such as. B. PNA.
- the nucleic acids can also be chemically modified to increase stability, e.g. B. by methylation.
- the incubation times of library and extract depend on the proteolytic activity of the sample used.
- the methods according to the invention are carried out repeatedly with variation of the incubation times. This has the advantage that kinetic statements regarding the sample and its peptide substrates, which contain the library of fusion molecules, can be made. Peptide substrates that are proteolytically cleaved at short incubation times have a high rate constant compared to proteolytically active components of the sample.
- Another simple way of being able to make kinetic statements about the proteolytic activity of the sample is either by varying the concentration of the fusion molecules of the library which form the peptide substrates, or preferably by varying the concentration of the sample intended for incubation.
- a great advantage of the method according to the invention is that the proteolytic activity of the sample examined is phenomenological, that is to say without complete
- proteolytic active components of the sample can be described. When comparing different samples, it is irrelevant whether a different proteolytic activity is due to the presence of different proteases or to a direct mutation of a protease, which is rarely the case, or for a malregulation of a protease gene or a protease inhibitor or
- a cell's cytosol can be altered.
- the degree of phosphorylation plays a decisive role in the regulation of enzyme activities in the cells and thus also has a decisive influence on the protease activity.
- a deregulated intracellular phosphatase and, coupled to it, the protease activity plays e.g. B. play a crucial role in the development of cancer.
- sequences of peptides can furthermore be determined quickly and easily, which are cut, in particular specifically cut, by the examined sample.
- sequences can also be found which are not subject to proteolytic cleavage by the examined sample.
- the methods described above can also be used to find inhibitors or activators with a specific effect, without the proteases to be inhibited having to be known in individual cases.
- a potential inhibitor or activator is simply added to the sample solution and the differential proteolytic activity between the sample and samples containing potential inhibitors or activators is determined. The number of split is reduced
- Sequences are inhibitors; if the number of cleaved sequences increases, they are activators. In a preferred embodiment, a preselected library of fusion molecules is used to identify inhibitors
- protease inhibitors also offers the possibility of combining many effective inhibitors in a mixture of active substances in order to prevent the occurrence of resistance.
- Another object of the present invention are proteolytically cleavable substances, which are those obtainable by one of the methods described
- the specific proteolytically cleavable peptide sequences can be used for the synthesis of inhibitors with a specific action.
- z. B chemical modifications to the peptide sequence or one or more ⁇ -amino acids of the peptide are exchanged for ⁇ -amino acids or L-amino acids for D-amino acids in order to prevent proteolysis (see e.g. Werder M. & Hauser H (1999) Helvetica Chimica Acta, 82, 1774-1783).
- the specific proteolytically cleavable peptides that can be identified with the present methods can be used for the construction of drug delivery systems in order to achieve a selective release of active substance at the target site. It can be at the destination z. B. to a certain organ, tissue, a certain cell type, a subcellular compartment or to sick versus healthy tissue or to microbially infected versus unaffected tissues or cells.
- the specifically proteolytically cleavable substances can be used as covalently bound inhibitors.
- the specific proteolytically cleavable peptides can also be used as Linkers can be used to target a drug with a ligand, such as.
- the variant of the directed in vitro protein evolution makes it possible to change known peptide cleavage sequences so that other cleavage kinetics result.
- the time profile of the active ingredient release can thus be controlled.
- diseases can be combated more efficiently by means of a target-controlled release of active substances, in which proteolytic activities have changed at the desired site of action compared to the healthy state or which are due to an incorrect regulation or mutation of specific proteases or their activators or inhibitors .
- diseases with disturbed protease activity are e.g. B. asthma,
- Osteoporosis cancer, such as leukemia, breast cancer, colon cancer, stroke, neuronal diseases, such as Alzheimer's, arthritis, pancreatitis, high blood pressure, thrombosis, colds or schistosmiasis.
- the targeted release of active ingredients can minimize the side effects of these active ingredients and the amount of active ingredient to be used can be reduced due to the changed distribution profiles in the organism.
- Pharmaceutical active ingredients are particularly interesting. B. against bacteria, fungi, viruses or against diseased tissue cells, but also herbicides, fungicides or insecticides can be used.
- the assay can e.g. B. on a comparison of the profile of the proteolytic activity of extracts against a library of fusion molecules defined in their composition between diseased tissue, e.g. B. from cancer cells, and based on a sample to be examined.
- assays which are based on peptides which can only be proteolytically cleaved by pathological tissue compared to a comparison or preliminary sample.
- the separated parts of the Fusion molecules provided sequencing step are omitted.
- the presence of a specific disease-specific protease activity can be identified using a hybridization probe.
- Such a method can be highly integrated by using many cleavable peptides identified as disease-specific markers in such an assay.
- the specifically cleavable peptides identified with the methods according to the invention can also be used directly for the screening of inhibitors, such as, for. B. in a FRET assay.
- the specifically cleavable sequences can also be used in vivo as a substrate for FRET assays.
- Another use of the peptides which can be specifically cleaved from a proteolytically active sample is for isolating the protease which cleaves this peptide sequence (see, for example, Li Y.M. (2000) Nature, 405: 689-694).
- Serine proteases are protein enzymes that catalyze the hydrolysis of peptide bonds within proteins.
- the target protein is often selectively cut due to the specific peptide linkage within the substrate.
- the serine proteases include, among others
- Tissue plasmino activator Tissue plasmino activator, tr ⁇ psin, elastase, chymotrypsin, thrombin and plasmin.
- Many stages of the disease can be treated with serine protease inhibitors, such as blood clotting disorders.
- Elastase inhibitors can reduce the clinical progression of emphysema.
- the specific proteolytically cleavable peptides determined according to the methods described above can be used e.g. B. coupled with standard methods on column material and an affinity chromatography of the proteolytically active samples can be carried out on it.
- the buffer used during the binding cycles must not be denaturing so that the protease is not inactivated.
- the proteases interacting with the peptides can be used e.g. B. coupled with standard methods on column material and an affinity chromatography of the proteolytically active samples can be carried out on it.
- the buffer used during the binding cycles must not be
- Example 1 Preparation of fusion molecules containing a peptide with known ones
- Protease interface and a nucleic acid encoding the peptide.
- fusion molecules that contain a peptide sequence that is specifically cleaved by the protease thrombin (“thrombin fusion molecules”).
- thrombin fusion molecules fusion molecules which contain a peptide sequence which is specifically cleaved by the matrix metalloprotease-3 (MMP-3) (“MMP-3 fusion molecules”).
- MMP-3 fusion molecules matrix metalloprotease-3
- the fusion molecules produced in this way have protease interfaces for MMP-3 or for thrombin.
- the MMP-3 protease cuts between Glu and Leu
- the thrombin protease cuts between Arg and Ser.
- the peptide sequences used and the corresponding nucleotide sequence are given below.
- DNA (bp): AGA CCA AAA CCC GTT GAG CTC TGG AGA AAG (Seq. ID No. 2)
- Fig. 1 shows the PCR products on 2% agarose-ethidium bromide gel. Lane 1: 50 bp DNA marker, Lane 2: MMP-3 DNA, Lane 3: Thrombin DNA,
- the MMP-3 DNA and the thrombin DNA could be successfully amplified.
- the PCR products have the expected molecular weight of 199 bp for the MMP-3 DNA and 89 bp for the thrombin DNA.
- the DNA was incubated with 5 ⁇ T7 buffer, rNTPs and T7 RNA polymerase for 4 hours at 37 ° C.
- RNA was purified by means of phenol-chloroform extraction and on a 6%
- Lane 2 shows the RNA obtained after transcription on 6% urea gel. Lane 1: MMP-3 RNA, Lane 2: thrombin RNA
- RNA can be detected as expected after the transcription reaction.
- the RNA shows no degradation.
- the ligation efficiency was checked on a 5% urea-agarose gel.
- Lane 3 shows the analysis of the ligation reaction on a 5% urea TBE gel.
- Lane 1 MMP-3 RNA
- Lane 2 MMP-3 RNA with puromycin linker
- Lane 3 thrombin RNA
- Lane 4 thrombin RNA with puromycin linker. (The signal L comes from the dye marker.) After ligation of the puromycin linker to the RNA, a clear increase in molecular weight can be seen, which indicates the successful linkage of the thrombin RNA and the MMP-3 RNA with the puromycin.
- RNA 8 ⁇ l of linked RNA were mixed with 200 ⁇ l of reticulocyte lysate, (Promega, Madison, USA L416X), 5 ⁇ l of 35 S-methionine (Hartmann, 10.8 ⁇ M, specific activity: the specific activity is 72181 dpm / pmol), 6 ⁇ l amino acid mix (without methionine 1 mM, Promega) and 80 ⁇ l H 2 O mixed and then incubated at 30 ° C for 30 minutes. After adding 130 ⁇ l 2 M KCI and 75 ⁇ l MgC, the mixture was incubated again at 30 ° C. for 30 minutes.
- oligo dT-cellulose Amersham Pharmacia, Freiburg, Germany
- the purified 200 ⁇ l fusion molecules were mixed with 2.5 ⁇ l 100 ⁇ M reverse primer and incubated for 5 minutes at 80 ° C. After cooling the
- Reaction mixture on ice 50 ul 5x beach buffer, 20 ul dNTP 's (each 10 mM), 2.5 ul RT-Superscript II (all Promega, Madison, USA) were added and incubated at 42 ° C for 40 minutes
- the fusion molecules produced were incubated with the corresponding proteases and the reaction products were analyzed (FIG. 4).
- 10 nM MMP-3 (Sigma, Deisenhofen, Germany) was added to 5 pmol fusion molecule containing the MMP-3 interface and added in MMP-3 buffer (50 mM Tris pH 7, 150 mM NaCl, 10 mM CaCl 2 ) Incubated 37 ° C in a total volume of 15 ul for 45 minutes.
- Thrombin buffer 50 mM Tris pH 8, 150 mM NaCl at 37 ° C in one
- the “MMP-3 or thrombin fusion molecules” produced were proteolytically cleaved by the protease MMP-3 or the protease thrombin.
- Step 1 Coupling of the Fusion Molecules to Streptactin-Sepharose (Carrier Material) via an N-Terminal Strep Tag Step 2. Proteolytic cleavage of the "thrombin fusion molecules" on Streptactin-Sepharose (Carrier Material) via an N-Terminal Strep Tag Step 2. Proteolytic cleavage of the "thrombin fusion molecules" on Streptactin-Sepharose (Carrier Material) via an N-Terminal Strep Tag Step 2. Proteolytic cleavage of the "thrombin fusion molecules" on Streptactin-Sepharose (Carrier Material) via an N-Terminal Strep Tag Step 2. Proteolytic cleavage of the "thrombin fusion molecules" on Streptactin-Sepharose (Carrier Material) via an N-Terminal Strep Tag Step 2. Proteolytic cleavage of the "thrombin fusion molecules" on
- Carrier material with thrombin Carrier material with thrombin.
- Step 3 Isolation of the cleaved C-terminal fusion molecule fragments
- the isolated fragments can optionally be purified via their His tag using affinity chromatography on nickel particles.
- Streptactin-Sepharose washed 5 times in Streptactin buffer (150 mM NaCl, 100 mM Tris pH 8) and then incubated for 2 hours at 4 ° C. Unbound fusion molecules were removed by washing five times with Streptactin buffer.
- the fusion molecules bound to Sterptactin-Sepharose were resuspended in 80 ⁇ l water and incubated with 10 ⁇ l 10 ⁇ thrombin buffer (1.5 M NaCl, 500 mM Tris pH 8) and 10 ⁇ l 100 U / ⁇ l thrombin at 37 ° C. for 45 minutes. As a control, the same approach was carried out without thrombin.
- reaction mixture was centrifuged (1 minute at 3000 rpm).
- streptactin-Sepharose containing the N-terminal fragment of the cleaved fusion molecules, was washed three times with streptactin buffer and then resuspended in 80 ⁇ l water.
- Control batch or the bound N-terminal fragments after incubation with thrombin were separated by SDS-PAGE and visualized by means of phosphoimaging (FIG. 6).
- thrombin fusion molecules or fragments of the fusion molecules bound to streptactin-Sepharose.
- 15 ⁇ l of the resuspended streptactin Sepharose was mixed with 5 ⁇ l Lämmli application buffer each, heated for 5 min at 82 ° C. and separated using 4-20% Tris-Glycine SDS-PAGE. The gel was then dried at 80 ° C. for 2 hours and visualized using phosphoimaging.
- Lane 1 "Thrombin fusion molecules” after incubation with thrombin.
- Lane 2 “Thrombin fusion molecules” without incubation with thrombin (control).
- band ii comes from peptide by-products
- band iii comes from the N-terminal fusion molecule fragment.
- the streptactin-Sepharose After the streptactin-Sepharose had been separated off, 15 ⁇ l of the supernatant or 15 ⁇ l of the resuspended streptactin-Sepharose were used for the PCR. In addition to the 15 ⁇ l samples, the 50 ⁇ l PCR batches also contained 5 ⁇ l 5 ′ and 3 ′ thrombin primers (5 pmol / ⁇ l), 10 mM dNTPs, 5 ⁇ l 10 ⁇ PCR buffer and 5 U / ⁇ l Taq DNA
- Lane 3 "Thrombin fusion molecules” + thrombin; bound to Streptactin-Sepharose.
- Lane 4 "Thrombin fusion molecules” without thrombin; bound to streptactin-sepharose. Consequently, it can be shown that "thrombin fusion molecules" are cut by the incubation with thrombin. After separation of the N-terminal fragment which contains no nucleic acid part, the C-terminal part remains in the supernatant Lane 1, Fig. 7) a strong PCR
- Lane 2 Fig. 7 is only very weak.
Abstract
Description
Claims
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CA002420065A CA2420065A1 (en) | 2000-08-22 | 2001-08-07 | Methods for indentifying specifically cleavable peptides and use of such peptide sequences |
EP01962911A EP1314039A2 (en) | 2000-08-22 | 2001-08-07 | Method for identifying peptides that can be specifically cleaved and the use of peptide sequences of this type |
JP2002522247A JP2004507240A (en) | 2000-08-22 | 2001-08-07 | Methods for identifying specific cleavable peptides and uses of such peptide sequences |
AU2001283985A AU2001283985A1 (en) | 2000-08-22 | 2001-08-07 | Method for identifying peptides that can be specifically cleaved and the use of peptide sequences of this type |
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DE10041238A DE10041238A1 (en) | 2000-08-22 | 2000-08-22 | Process for the identification of specifically cleavable peptides and use of such peptide sequences |
DE10041238.6 | 2000-08-22 |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994013623A1 (en) * | 1992-12-11 | 1994-06-23 | Chiron Corporation | Synthesis of encoded polymers |
US5563041A (en) * | 1993-12-30 | 1996-10-08 | Behringwerke Aktiengesellschaft | Method for determining platelet aggregation |
WO1997047314A1 (en) * | 1996-06-10 | 1997-12-18 | The Scripps Research Institute | Use of substrate subtraction libraries to distinguish enzyme specificities |
US5981200A (en) * | 1996-01-31 | 1999-11-09 | The Regents Of The University Of California | Tandem fluorescent protein constructs |
EP0962527A1 (en) * | 1996-10-17 | 1999-12-08 | Mitsubishi Chemical Corporation | Molecule that homologizes genotype and phenotype and utilization thereof |
JP2001103966A (en) * | 1999-10-06 | 2001-04-17 | Nof Corp | Hybrid cell, monoclonal antibody, production method and assay |
WO2001075088A1 (en) * | 2000-04-05 | 2001-10-11 | Esbatech Ag | Method for identify polypeptides with protease activity |
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Publication number | Priority date | Publication date | Assignee | Title |
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US5723286A (en) * | 1990-06-20 | 1998-03-03 | Affymax Technologies N.V. | Peptide library and screening systems |
ES2373110T3 (en) * | 1997-01-21 | 2012-01-31 | The General Hospital Corporation | SELECTION OF PROTEINS USING ARN-PROTEIN FUSIONS. |
-
2000
- 2000-08-22 DE DE10041238A patent/DE10041238A1/en not_active Withdrawn
-
2001
- 2001-08-07 JP JP2002522247A patent/JP2004507240A/en active Pending
- 2001-08-07 CA CA002420065A patent/CA2420065A1/en not_active Abandoned
- 2001-08-07 WO PCT/EP2001/009102 patent/WO2002016574A2/en not_active Application Discontinuation
- 2001-08-07 AU AU2001283985A patent/AU2001283985A1/en not_active Abandoned
- 2001-08-07 EP EP01962911A patent/EP1314039A2/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994013623A1 (en) * | 1992-12-11 | 1994-06-23 | Chiron Corporation | Synthesis of encoded polymers |
US5563041A (en) * | 1993-12-30 | 1996-10-08 | Behringwerke Aktiengesellschaft | Method for determining platelet aggregation |
US5981200A (en) * | 1996-01-31 | 1999-11-09 | The Regents Of The University Of California | Tandem fluorescent protein constructs |
WO1997047314A1 (en) * | 1996-06-10 | 1997-12-18 | The Scripps Research Institute | Use of substrate subtraction libraries to distinguish enzyme specificities |
EP0962527A1 (en) * | 1996-10-17 | 1999-12-08 | Mitsubishi Chemical Corporation | Molecule that homologizes genotype and phenotype and utilization thereof |
JP2001103966A (en) * | 1999-10-06 | 2001-04-17 | Nof Corp | Hybrid cell, monoclonal antibody, production method and assay |
WO2001075088A1 (en) * | 2000-04-05 | 2001-10-11 | Esbatech Ag | Method for identify polypeptides with protease activity |
Non-Patent Citations (3)
Title |
---|
D'AMICO A V ET AL: "THROMBIN IMPLICATIONS FOR INTRATUMOR THERAPY AGAINST METASTASIS" JOURNAL OF CANCER RESEARCH AND CLINICAL ONCOLOGY, Bd. 114, Nr. 2, 1988, Seiten 129-132, XP002187158 ISSN: 0171-5216 * |
GOODMAN AND GILMAN: "Pharmacological basis of therapeutics" 1991 , MCGRAW-HILL INTERNATIONAL EDITIONS , SINGAPORE XP002187262 2 Seite 1311, Spalte 2, Absatz 2 -Seite 1312, Spalte 2, Absatz 2 * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 21, 3. August 2001 (2001-08-03) & JP 2001 103966 A (NOF CORP;KITAMOTO YASUNORI), 17. April 2001 (2001-04-17) * |
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CA2420065A1 (en) | 2003-02-19 |
DE10041238A1 (en) | 2002-03-07 |
WO2002016574A3 (en) | 2002-09-06 |
JP2004507240A (en) | 2004-03-11 |
AU2001283985A1 (en) | 2002-03-04 |
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