CN105601710B

CN105601710B - A kind of peptide variant for the treatment of cancer and its application

Info

Publication number: CN105601710B
Application number: CN201610002822.2A
Authority: CN
Inventors: 朱凌玮
Original assignee: Li Bao Jun
Current assignee: Li Bao Jun
Priority date: 2014-05-29
Filing date: 2014-05-29
Publication date: 2019-10-15
Anticipated expiration: 2034-05-29
Also published as: CN105481949A; CN105601712A; CN105601714B; CN105601714A; CN105601710A; CN105504016A; CN105597078B; CN105601715B; CN105585615A; CN105622722B; CN105601711A; CN105601711B; CN105585615B; CN105601713A; CN105622722A; CN105597078A; CN105481948B; CN105481948A; CN105504017B; CN105504017A

Abstract

The present invention provides the variant SEQ ID No:2-15 and its pharmaceutical applications of a series of peptide of anticancers.These peptide variants are to carry out the modification of specificity respectively by series of points mutation and both ends on the basis of sequence SEQ ID No:1 and obtain, these peptide variants have the effect of stronger killing tumor cell relative to wild type, there is wide pharmacy prospect.

Description

A kind of peptide variant for the treatment of cancer and its application

Technical field

The invention belongs to field of biotechnology, specifically, the present invention relates to the peptide variants for the treatment of cancer.

Background technique

Micro-pipe is the constituent of one of three threadlike networks of cytoskeleton, is complicated, unstable polymer, micro- The basic unit of pipe is α-and 'beta '-tubulin dimer.For example, they are responsible for various kinds of cell movement, axonal transport or movement Property, in particular, they provide the basic material for being used to form mitotic spindle.Micro-pipe constantly re-forms different length Hollow tube.Therefore, by destroying the microtubule dynamics of cancer cell, peptide of the invention, which can play, prevents the anti-of cancer cell multiplication from having The effect (slowing down or prevent the mitosis of cancer cell) of silk disintegrating agent.

Active peptide of the invention also shows the plasma membrane for specifically changing cancer cell, and shows in host organisms Healthy cell in do not cause these identical changes.The active peptide has the property of polycation, therefore they can be acted on On the plasma membrane of the cancer cell rich in negative electrical charge.

In the prior art, in order to improve the activity of albumen or peptide, specificity is carried out for the active site of albumen or peptide Mutation and substitution, so that finding the higher variant of activity is conventional way.

Detailed description of the invention

Peptide shown in sequence SEQ ID No:1 is well known in the prior art can be used for treating cancer.But its Activity is not very satisfactory.In order to further increase the bioactivity of the peptide, applicant through a large number of experiments, for Specific site has carried out the modification that point mutation and both ends carry out specificity respectively in peptide shown in SEQ ID No:1, thus Obtain the variant that there is higher tumor-suppression activity than peptide itself shown in SEQ ID No:1.

Specifically, the sequence for being used as the peptide of the active constituent for the treatment of cancer is (Table I) as follows:

Applicant has confirmation to the research of these peptides of SEQ ID No:2 to SEQ ID No:15, these peptides are relative to SEQ The peptide of ID No:1 has higher cytotoxic activity to cancer cell, while having to the cell of host to be treated very weak Toxicity or nontoxicity.Change to active peptide of the invention the micro-pipe of cancer cell.

The drug that cited peptide is used as treating cancer in Table I specifically can effectively treat leukaemia, liver cancer, glue Matter blastoma etc..

Another feature according to the present invention generates sequence SEQ ID No:1 to SEQ ID No:15 by chemical synthesis Peptide.

Another purpose of invention is related to the pharmaceutical composition comprising one of peptide defined above.

Advantageously, the composition is the uncoated or coating of aqueous suspension or solution form or drying regime Tablet form, such as pill, gel capsule, capsule or powder.

If described pharmaceutical composition is in drying regime, it can for example form sediment with one or more inert diluents The mixing such as powder, cellulose, sucrose, lactose or silica.It can also include in the dry state other substances, such as a kind of Or a variety of lubricants such as magnesium stearate or talcum powder, colorant, coating (sugar coated tablet) or varnish.

If pharmaceutical composition of the invention is liquid form, it may include containing inert diluent such as water, second Alcohol, glycerol, vegetable oil or atoleine pharmaceutical solution, suspension, emulsion, syrup and elixir.The pharmaceutical composition Object can also include other liquid substances in addition to diluent, such as wetting agent, sweetener, thickener, flavoring agent or stabilization Agent product.

The composition optionally with pharmaceutical inert excipient or combination of media, which is characterized in that can be with skin It is skin, transdermal or percutaneous；It is oral；Parenterally；Composition described in the form local application of nose or bronchus application.

Pharmaceutical compositions for the parenteral administration can be aqueous or non-aqueous solution, suspension or emulsion.These systems Agent is for example oily by the organic ester as the water of solvent or medium, propylene glycol, vegetable oil especially olive oil and sesame oil, injectable Acetoacetic ester or other suitable organic solvents are made.Described pharmaceutical composition can also contain adjuvant, especially wetting agent, etc. Penetration enhancer, emulsifier, dispersing agent and stabilizer.

For local application, advantageously, the drug is applied in the form of ointment, emulsifiable paste, gel or patch.

In addition, described pharmaceutical composition may be utilized independently or be used in combination in given treatment with other drugs, or Person combines with radiotherapy or operation.

Specific embodiment

A) the synthesis of peptide

The synthesis and purifying of peptide SEQ ID No:1 to SEQ ID No:17

It is prepared by using N-9- difluorophenyl methoxycarbonyl and Novasyn TGS resin manual separation synthesis in solid state The peptide.The group of side chain protection includes the tert-butyl of serine and the tert-butoxycarbonyl of lysine.In order to prepare with second Acetic anhydride is added in resin-peptide complexes by the peptide of acylated N-terminal residue after being connected to last amino acid residue, And 1 hour is kept stirring to promote acetylation.

Pass through the trifluoroacetic acid/1,2- dithioglycol/methyl phenyl ethers anisole/phenol/water (volume ratio for being 10mL.g-1 with concentration Handle 2 hours at room temperature 82.5:2.5:5:5:5) to shear the resin-peptide complexes.It is then filtered to remove tree Rouge.Then 4 DEG C of ether is added, precipitates thick peptide, collects thick peptide after being then centrifuged 15 minutes with 1000g at room temperature.Then Thick peptide is dissolved in water, and uses Shiseido C-18 semi-preparative column (250mm x 10.0mm；5 μm) with containing 0.1% (v/v) 40% (v/v) acetonitrile of TFA is to carry out chromatography by RP-HPLC under the rate isocratic elution of 2mL/min.With UV-DAD detector (ultraviolet light diode array detector) (Shimadzu, model SPD-M10A) adjusts elution at 215nm, And the fraction of each elution is collected manually in the vial of 2mL.It is closed by HPLC and ESI-MS analysis to measure At peptide (two kinds of peptides of acetylation and non-acetylation) sequence.After peptide is synthesized, purifies and examines, confirmation has obtained Table I institute The peptide sequence shown.

B) activity of the peptide SEQ ID No:1-17 to healthy cell

Contact two kinds of nononcogenic fibroblast FIBRO1 and FIBRO2 with peptide SEQ ID No:1-17, it is strong to observe Whether the microtubular network of health cell is also destroyed by the peptide.In the case where the use of peptide concentration being 15 μM, represent a variety of normal thin The human fibroblasts of born of the same parents do not respond to (the tubulin density of polymerization does not change) to peptide SEQ ID No:1-15 at all.And The fibroblast of SEQ ID No:16-17 processing is affected to tubulin density, thickness thinning about 15%. This explanation, peptide SEQ ID No:1-15 are inactive to healthy cell.When peptide SEQ ID No:1-15 is used as mammal, especially When being the therapeutic agent of people, in fact it is very likely to that seldom side effect occurs.

C) the measurement of cell Proliferation and cell survival rate

Following cell line (Table II) is analyzed, to determine the activity of simultaneously quantitation of peptides SEQ ID No:1-17.

Table II

Organization type	Cell line
		Acute promyelocytic leukemia cell line	NB4
Liver cancer	HepG2
		Glioblastoma	U87M6

With the volume of every hole 0.2mL will about 10000 cell inoculations into 96 hole microplates, after 24 hours, with peptide SEQ ID No:1-17 is handled.By cell in CO under conditions of there are peptide SEQ ID No:1-17₂It is incubated at 37 DEG C in incubator 48 hours.After incubation, by MTT reagent or (3- (4,5- dimethyl -2- base) -2,5- diphenyl bromination tetrazolium (0.5mg/ml, In the volume of 0.1ml) it is added in each hole and is incubated for 2 hours at 37 DEG C.Then, the tetrazole ring contained by MTT is lived The succinate dehydrogenase of cell restores.Then, supernatant is removed, and 0.1ml lysis buffer is added (containing 10%tritonX100 With the isopropanol of 10%1N HCl) with dissolution be formed by bluish violet formazan precipitating.After a few minutes, existed at room temperature with microplate reader Absorbance is measured under the Detection wavelength of 562nm.The survival rate of control cell is confirmed using the hole without peptide.By thin after processing (peptide SEQ ID No:1-17 is at this come the IC50 that assesses each cell for the ratio of the absorbance of the absorbance and control cell of born of the same parents Cause concentration when 50% cytotoxicity in a little cell lines) value, μM.Table III

As shown in Table III, peptide SEQ ID No:2-15 significantly improves the proliferation of three of the above tumour cell.Than peptide SEQ ID No:1 significantly reduces the virose dosage of cancer cell, and SEQ ID No:16 and 17 improves IC50 value instead, Illustrate that the peptide SEQ ID No:2-15 of the application has compared with the existing technology to the better inhibitory effect of tumour cell, it can be into one Step is used for the associated treatment of tumour.

Drug resistance of the cancer cell to peptide

SEQ ID No:1-15 is subjected to drug resistance experiment to cancer cell respectively, experimental method is the side of this field routine Method, the peptide, which has, as the result is shown does not induce quick drug resistance process.

Sequence table

<110>Zhu Lingwei

A kind of peptide variant XA4 for the treatment of cancer of 120 > of < and its application

〈160〉17

〈210〉1

〈211〉14

〈212〉PRT

〈213〉artificial sequence

〈400〉1

INWLKIAKKVAGML

〈210〉2

〈211〉14

〈212〉PRT

〈213〉artificial sequence

〈400〉2

SINWLKIAKKVAGML

〈210〉3

〈211〉15

〈212〉PRT

〈213〉artificial sequence

〈400〉3

SINWLAIAKKVAGML

〈210〉4

〈211〉15

〈212〉PRT

〈213〉artificial sequence

〈400〉4

SINWLAIAAKVAGML

〈210〉5

〈211〉15

〈212〉PRT

〈213〉artificial sequence

〈400〉5

SINWLAIAAKVGGML

〈210〉6

〈211〉16

〈212〉PRT

〈213〉artificial sequence

〈400〉6

SINWLKIAKKVAGMLL

〈210〉7

〈211〉16

〈212〉PRT

〈213〉artificial sequence

〈400〉7

SINWLKIAKKVAGMLL

〈210〉8

〈211〉16

〈212〉PRT

〈213〉artificial sequence

〈400〉8

SINWLAIAKKVAGMLL

〈210〉9

〈211〉16

〈212〉PRT

〈213〉artificial sequence

〈400〉9

SINWLAIAAKVAGMLL

〈210〉10

〈211〉16

〈212〉PRT

〈213〉artificial sequence

〈400〉10

SINWLAIAAKVGGMLL

〈210〉11

〈211〉18

〈212〉PRT

〈213〉artificial sequence

〈400〉12

INWLINWLKIAKKVAGML

〈210〉12

〈211〉19

〈212〉PRT

〈213〉artificial sequence

〈400〉12

INWLSINWLKIAKKVAGML

〈210〉13

〈211〉19

〈212〉PRT

〈213〉artificial sequence

〈400〉13

INWLSINWLAIAKKVAGML

〈210〉14

〈211〉20

〈212〉PRT

〈213〉artificial sequence

〈400〉14

INWLSINWLAIAAKVGGMLL

〈210〉15

〈211〉20

〈212〉PRT

〈213〉artificial sequence

〈400〉15

INWLSINWLKIAKKVAGMLL

〈210〉16

〈211〉18

〈212〉PRT

〈213〉artificial sequence

〈400〉16

INWL INWLAIAKKVAGML

〈210〉17

〈211〉20

〈212〉PRT

〈213〉artificial sequence

〈400〉17

INWLSINWLAIAKKVAGMLL

Claims

1. a kind of peptide for treating cancer, it is characterised in that: be XA4, amino acid sequence is SEQ ID No:4.

2. peptide described in claim 1 answering in preparation treatment acute promyelocytic leukemia or the drug of hepatoblastoma With.