CN1251764C - Tumour gene Switch medicine - Google Patents
Tumour gene Switch medicine Download PDFInfo
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- CN1251764C CN1251764C CN 200310113538 CN200310113538A CN1251764C CN 1251764 C CN1251764 C CN 1251764C CN 200310113538 CN200310113538 CN 200310113538 CN 200310113538 A CN200310113538 A CN 200310113538A CN 1251764 C CN1251764 C CN 1251764C
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Abstract
The present invention relates to a tumor gene switch medicine, which is a medicine which is composed of a section of decoy ribonucleic acid with specific sequences. The ribonucleic acid can be specifically combined with transcriptional control factors of some cancer genes in cells and inhibits the overexpression of the cancer genes, and thereby, the growth of tumor cells is inhibited. The present invention can be developed into a medicine for treating tumor genes.
Description
Technical field:
Anti-tumor medicine.
Background technology:
From molecular level, tumor relates to the movable unusual disease of polygenes, and every kind of tissue canceration or every kind of cell phenotype all relate to tens of and even hundreds of gene activities.Still indeterminate which gene as the treatment target spot.But tentatively distinct now, tumor be to carry out the rapid multistage of multistep.Have preface in vain with a certain cell phenotype related gene group's activity on time and carry out, the tandem type expression rule is arranged, the activity that is in the functional gene in tandem type downstream is controlled by the controlling gene of upstream.Therefore, the controlling gene by changing the upstream movable unusual still can be controlled whole downstream gene group's activity, and then make cell phenotype return to optimum phenotype from the malignant phenotype, reaches the purpose of curing tumor.
The controlling gene of upstream promptly is the gene of express cell nuclear factor (DNA is conjugated protein), comprises that relevant proto-oncogene and antioncogene take place tumor.Because under some extraneous factor effect, proto-oncogene activates and the inactivation of overexpression and antioncogene.Be that disorder out of control takes place controlling gene, expression regulation own is not normal, and causes other downstream gene regulation and control and express not normal chain reaction, causes tumor to take place, and therefore, proto-oncogene, antioncogene are the important target spots of therapy of tumor.
Feature of tumor cell is the proto-oncogene overexpression, wherein c-myc all has high expressed in kinds of tumors such as myelogenous leukemia, B lymphoma, T lymphoma, sarcomas, and in leukemia, breast carcinoma, gastric cancer, small cell lung cancer, colon cancer, neurocytoma, glioblastoma multiforme, retinoblastoma cell cancer amplification is in various degree arranged all.Cause overexpression at the human liver cancer cell hypomethylation.C-fos is in overexpressions such as osteosarcoma, lymphoma.C-jun is at cellule type lung tumor and lung cancer in non-cellule type, colorectal carcinoma high expressed.In the startup of tumor, short tumor stage, the high expressed (taking place relevant with tumor) of c-myc, c-jun is arranged.
Tumor cell another feature: the lost cell period specific lose the respond of on cell proliferation signal, and the c-myc overexpression is one of prerequisite of cell proliferation.The MYC-MAX heterodimer is incorporated into E-box, and expression such as activation itself and downstream communication gene C YC25A form the cell proliferation phenotype, and with the E2F combined effect, activate cyclinA, cyclin E, G1 in cell cycle → conversion of S phase is to play a crucial role.C-myc also can activate the expression of telomerase, forms in the promotion tumor to play an important role.C-jun and c-fos play an important role in the nuclear phase of the downstream of PAS signal transduction path.(being called as early stage fast reaction gene or third messenger).C-myc and c-fos play an important role in cell differentiation.In addition, play an important role in c-myc, c-fos, c-jun, the cell maturation stable at apoptosis, genome.Therefore, the regulation and control that change c-myc, c-fos, c-jun are unusual, are optimum phenotype thereby can change the malignant proliferation phenotype,
Proto-oncogene and antioncogene exist simultaneously at normal cell and tumor cell, the expression degree difference that different is in the two class cells, and tumor cell is the proto-oncogene overexpression, is Normocellular 2～10 times, and the antioncogene inactivation.These explanation expression of gene regulation and control have occurred unusual, this be unusually cis-trans factor bonding state and quantity on the control region of gene generation change, how to eliminate this unusual, change the gene regulation state, at present a kind of new strategy being arranged in the world is transcription factor " bait " method (decoy), with specific DNA sequence in conjunction with transcription regulatory factor (comprising transcription inhibition factor on the activating transcription factor on the enhancer and antioncogene silencer on the proto-oncogene), change the expression status of controlling gene, thereby change cell phenotype.
People are in the basic research of DNA and protein interaction relation, find and confirm: external synthetic one section sequence-specific short chain DNA, can combine with a certain factor in the nucleus protein extract, in polyacrylamide gel electrophoresis, produce the gel inhibition phenomena, provide experiment basis for present decoy nucleic acid develops into medicine.Since the nineties, Bielinska (1990) has proposed with since the double-stranded nucleic acid oligomer regulate gene expression, decoy nucleic acid at first is used in the exploitation of treatment cardiovascular drugs, neointimal hyperplasia (Mann.et al1999) with the decoy exonuclease treatment venous bypass postoperative blood vessel of the E2F factor has entered clinical, prevent and treat myocardial infarction (Sawa.1997.Tounita.1998) with the decoy nucleic acid of NF-Kappa β, also have the decoy nucleic acid of AGE, SRF etc.Decoy nucleic acid is applied to oncotherapy and just has been in the starting stage, as: the decoy nucleic acid of the CREB factor (Cho-chong 1999) is carried out in various tumor cell strains and animal model.The decoy nucleic acid of ER (PivaR et al 2000) is used to suppress the breast cancer cell growth.The decoy nucleic acid of NF-Kappa β (Sharma.HW eta1) is obtained certain inhibition effect at mice fibroma internal and external test.
Summary of the invention:
One of purpose of the present invention provides genetic switch medicine for treating tumor, it is characterized in that a series of sequence-specific decoy nucleic acid, but specificity is in conjunction with transcription regulatory factor separately.Oncogene c-fos, c-jun, the c-myc of downward modulation overexpression, thus the malignant proliferation of inhibition tumor cell reaches the purpose for the treatment of tumor.
Another object of the present invention provides and contains decoy nucleic acid medicine composition of the present invention.
Another object of the present invention is the purposes that decoy nucleic acid of the present invention is used to prepare antitumor drug.
Purpose of the present invention can reach by following measure:
The design of genetic switch medicine for treating tumor is with the sequence of the transcription factor specific bond core sequence as medicine decoy nucleic acid, and suitably increase the flank length of core sequence, make it easily form space structure, stability of drug reaches and the affinity of the target factor to strengthen.
Medicine KGCD101A series is to design for the overexpression of regulating and control proto-oncogene C-FOS.Control region according to proto-oncogene C-FOS combines a plurality of factors, as: SRF, CREB, AP-1, the SIF factor etc., wherein the binding site GRE enhancer sequence STGACGTMR (sequence 1) of the CREB factor is as the core sequence of medicine decoy nucleic acid, competition is reduced the expression of proto-oncogene C-FOS in conjunction with CREB.For example: medicine KGCD101a (sequence 6) is made up of 34 nucleotide, contains this core sequence, and has hairpin structure.For another: medicine KGCD101a-1 also can be made up of sequence 7 that contains this core sequence and sequence 8,48 nucleotide, two sequences are combined in the double-stranded process and form decussate texture.Medicine KGCD101a-2 forms T shape structure by sequence 7 and sequence 9.In a word, this class decoy nucleic acid drug, can be designed as with STGACGTMR is core sequence, nucleotide adds up to 15-55.And easily form the short chain dna molecular of hair clip, false knot, stem ring, dumbbell, the multiple secondary structure of cross.
Medicine KGCD101B and KGCD101C series design for regulating and control multiple proto-oncogene.FOS-JUN forms heterodimer, becomes the AP-1 activating transcription factor, and it is incorporated on the cis element STGASTMA (sequence 2) of a plurality of genes, activates the expression of several genes.Adopting this sequence is the core sequence of medicine decoy nucleic acid, and downward modulation contains AP-1 enhancer expression of gene, thereby suppresses the growth of tumor cell.For example: medicine KGCD101b is made of sequence 10 and sequence 11, contains this core sequence, and nucleotide adds up to 42 double chain DNA molecule.Medicine KGCD101b-1 (sequence 12) has 35 nucleotide and contains this core sequence, has hairpin structure.Medicine KGCD101b-2 (sequence 13) has 42 nucleotide and contains this core sequence, has the dumbbell structure, available ligase makes 5 ' and 3 ' end connect into closed loop, to increase medicine stability.Medicine KGCD101G is made up of sequence 14 and sequence 15, and its nucleotide adds up to 42, contains this core sequence, has decussate texture.Medicine KGCD101c1 is made up of sequence 16 and sequence 17, and its nucleotide adds up to 44, contains this core sequence, has decussate texture.In a word, this class decoy nucleic acid drug, can be designed as with STGASTMA (sequence 2) is core sequence, nucleotide adds up to 15-55 ' and the easy short chain dna molecular that forms hair clip, false knot, stem ring, dumbbell, the multiple secondary structure of cross.
Medicine KGCD102 series designs for the regulation and control proto-oncogene c-jun.Effect according to c-jun autoactivation expression.The enhancer sequence TTACCTCA of c-jun protein binding autogene (sequence 3), this sequence is as the core sequence of the decoy nucleic acid of medicine KGCD102 series, and downward modulation c-jun expresses.For example medicine KGCD102 (sequence 18) is for containing this core sequence, and nucleotide adds up to 37, has one of this type of decoy nucleic acid drug of hairpin structure.Other has medicine KGCD102-1 (sequence 19) is 40 nucleotide, has hairpin structure.Medicine KGCD102-2 (sequence 20) is 38 nucleotide, has the dumbbell structure.Medicine KGCD102-3 (sequence 21 and sequence 22) is 54 nucleotide, has loop-stem structure.In a word, this class decoy nucleic acid drug, can be designed as with TTACCTCA (sequence 3) is core sequence, nucleotide adds up to 15-55, and easily forms the short chain dna molecular of hair clip, false knot, stem ring, dumbbell, the multiple secondary structure of cross.
Medicine KGCD103a series designs for regulation and control proto-oncogene C-MYC.Combine with self enhancer TCTCTTA (sequence 4) sequence according to C-MYC, with the basic composition of this core sequence as the decoy nucleic acid drug, downward modulation C-MYC gene expression.For example: medicine KGCD103a is by sequence 23: and sequence 24 forms: and double-stranded DNA is formed, and 52 nucleotide contain this core sequence.Medicine KGCD103a-1 (sequence 25) has 35 nucleotide that contain this core sequence, hairpin structure.Medicine KGCD103a-2 is formed by sequence 26 and sequence 27: loop-stem structure is formed, and 43 nucleotide contain this core sequence.Medicine KGCD103a-3 is made up of the capitate structure that sequence 28 and sequence 29 form, and 36 nucleotide contain this core sequence.In a word, this class decoy nucleic acid drug, can be designed as with TCTCTTA (sequence 4) is core sequence, nucleotide adds up to 15-55, and easily forms the short chain dna molecular of hair clip, false knot, stem ring, dumbbell, the multiple secondary structure of cross.
Medicine KGCD103b is for the dependency basis of regulation and control control cell cycle thereby design.Promote cell proliferation according to the MYC-MAX heterodimer, make cell lose period specific, cis element RACCACGTGGTY (sequence 5) is as the core sequence of decoy nucleic acid, external synthetic and transfered cell, combine the compound dimer of MYC-MAX with the cis element competition of gene itself, suppress downstream gene expression, change the malignant proliferation phenotype.For example: medicine KGCD103b (sequence 30) is 32 nucleotide, contains this core sequence.The cross structure that medicine KGCD103b-1 is formed by sequence 31 and sequence 32,47 nucleotide contain this core sequence.In a word, this class decoy nucleic acid drug, can be designed as with RACCACGTGGTY (sequence 5) is core sequence, nucleotide adds up to 15-55, and easily forms the short chain dna molecular of hair clip, false knot, stem ring, dumbbell, the multiple secondary structure of cross.
The decoy nucleic acid drug is synthetic through the full-automatic synthesizer of DNA, thioated, deprotection; purification and lyophilizing; soluble in water, behind the quantitative and qualitative determination and analysis, carry out the in-vitro screening and the test of pesticide effectiveness; with the NCI-H460 lung carcinoma cell as the screening system; cell is added 96 well culture plates, behind RPMI 1640 complete culture solutions cultivation 24h, add liposome and above-mentioned decoy nucleic acid; continue at 37 ℃, 5%CO
2The middle 48h that cultivates.Survival rate with SRB colorimetric method for determining cell.The selection result shows that six kinds of decoy nucleic acid all have in various degree inhibitory action, wherein the inhibitory action maximum of KGCD101a and KGCD102 to the NCI-H460 cell.These decoy nucleic acid all can be developed into and are antitumor drug.
Advantage of the present invention:
Decoy nucleic acid is different with antisensenucleic acids, and structural difference is: antisensenucleic acids is the linear nucleic acid oligomer of strand, and decoy nucleic acid can form double-stranded and tool secondary structure; The difference of action site; Antisensenucleic acids is complementary to certain section sequence of gene transcription product mRNA, and decoy nucleic acid is incorporated on the gene transcription regulation factor (protein); Difference on the consumption: the genetic transcription of a copy goes out 200～300 mRNA, and mRNA has instantaneity, needs the antisensenucleic acids dose big, and on copy gene transcription regulatory factor only 1～several, need decoy nucleic acid dose few.
Because of the core sequence of decoy nucleic acid between 6～12 base pairs, the short easily degraded of chain, double-stranded unstable, easily unwind under the room temperature.No secondary space structure is difficult for and protein binding, thereby design needs suitably to increase base during medicine, the lengthening chain length, enhanced stability reaches the affinity with transcription factor, and wherein with structure the bests such as palindrome, hair clip, cross, stem ring, mute tinkling of pieces of jade shapes, so decoy nucleic acid is designed to contain between 15～55 bases of above-mentioned core sequence, can synthesize strand, selfing forms two strands and secondary structure thereof, but also each synthesizes two strands, and hybridization forms double-stranded.Because of nucleic acid is very easily lost activity by nuclease degradation in cell, therefore need modification protection, to strengthen anti-degradation capability, improve stability.Thio-modification is modal blocking group.
In sum, five class decoy nucleic acid of the present invention all have inhibitory action to tumor cell, in the antitumor drug exploitation, sizable application prospect is arranged, decoy nucleic acid drug of the present invention can close with pharmaceutical carrier, and pharmaceutical carrier comprises common carrier such as normal saline and buffer and liposome, polymer etc.
Description of drawings:
Fig. 1: the decoy nucleic acid of KGCD series is to the growth inhibited figure of tumor cell NCI-H460
Fig. 2: KGCD101a and KGCD102decoy nucleic acid are to the growth inhibited figure of various cells
Fig. 3: KGCD101a and KGCD102decoy nucleic acid are to tumor cell NCI-H460's
Half lethal dose (IC
50) figure
As shown in Figure 1: the decoy nucleic acid experimental group that lung cancer cell line NCI-H460 is divided into positive controls, negative control group, blank group and six kinds of KGCD series, be inoculated in 96 well culture plates in the RPMI RPMI-1640 that contains 10% hyclone respectively, inoculation quantity is 2-3 * 10
4/ hole, cultivate after 24 hours, be replaced with serum-free medium, the blank group only adds 0.6 μ l/ hole empty liposome, all the other all add 0.6 μ l/ hole liposome is the different decoy nucleic acid of 200nM with final concentration, handle after 5 hours, be replaced with the RPMI RPMI-1640 that contains 10% hyclone, at 37 ℃, 5%CO
2Cultivate under the condition after 48 hours, with SRB dyeing, microplate reader is in λ
510nmMeasuring its OD value, and calculate cell survival rate, is 100% with blank group numerical value, makes cell growth inhibited figure.As can be seen from Fig. 1: CRE represents the result of the test of positive controls, C represents the result of the test of negative control group, remaining the 6 groups result of the tests that are KGCD series decoy nucleic acid experimental group, this 6 groups of KGCD series decoy nucleic acid all demonstrate in various degree inhibitory action to the NCI-H460 cell, and wherein the suppression ratio with KGCD101a and KGCD102 is the highest.
As shown in Figure 2: handle following tumor cell line NCI-H460 (pulmonary carcinoma) respectively with KGCD101a and KGCD102decoy nucleic acid, CNE (nasopharyngeal carcinoma), U251 (glioma), MCF-7 (breast carcinoma), BEL-7402 (hepatocarcinoma) and normal cell strain: L-02 (hepatocyte) and NIH3T3, the lightest cylinder is represented negative control group (mismatch), and is less to various cell growth effects.And various growth of tumour cell are all had in various degree inhibitory action with KGCD101a and KGCD102decoy nucleic acid, and wherein U251 (glioma) and NCI-H460 (pulmonary carcinoma) are suppressed maximum, and less to the growth effect of normal cell strain.
As shown in Figure 3: handle tumor cell NCI-H460 with the KGCD101a of variable concentrations and the decoy nucleic acid of KGCD102, as seen from the figure: KGCD101a and KGCD102 have inhibitory action to the NCI-H460 cell under the condition of low concentration, their half lethal dose is 30～50nM, and negative control group then cell growth does not have dose difference.
The specific embodiment:
The preparation and the analysis of embodiment 1decoy nucleic acid drug
Synthetic six kinds of following sulfo-decoy nucleic acid drug: KGCD101a (sequence 6), KGCD101b (sequence 10 and sequence 11) ' KGCD101c:(sequence 14 and sequence 15), KGCD102:(sequence 18), KGCD103a:(sequence 23 and sequence 24), KGCD103b (sequence 30).
The negative control sequence: 5 '-TGTGGTCATGTGGTCATGTGTCA-3 '
The positive control sequence: 5 '-TGACGTCATGACGTCATGACGTCA-3 '
The 391 type dna synthesizers that use U.S. applying biological Account Dept of PE company (Applied Biosystems) to make.Designed decoy nucleic acid with the synthetic sulfo-of phosphoramidite solid-phase synthesis.Primary raw material has: four kinds of diisopropyl β-cyanoethyl phosphoramidite monomers: adenosine (A), guanosine (G), cytidine (C), thymidine (T), four kinds of control aperture glass dust (CPG) solid phase synthesis posts (A, G, C, T).Synthetic scale is 10 micromoles.Block reagent is respectively: acetic anhydride/lutidines/oxolane and 1-Methylimidazole ./oxolane, thio reaction reagent: Beaucage reagent/acetonitrile, detritylation reagent: trichloroacetic acid/dichloromethane, liquid flux: acetonitrile and chloroform.The base monomer is dissolved in the anhydrous acetonitrile, and concentration is 100 mMs, and other reagent concentration and consumption all carry out according to the instrument handbook.Building-up process is by the programme-control of instrument own.Synthetic product is collected in the withstand voltage vial of sealing with strong aqua ammonia (29%), handles in 55 ℃ and sloughs various base blocking groups and amido protecting group on the nucleic acid molecules in 15 hours.Deprotection finishes the back volatilization and sloughs most of ammonia, and lyophilizing gets the white powder crude product, is dissolved in again in the buffer, carries out purification with Pharmacia Source 30Q chromatography and AKTA tomographic system.Purification of samples G-15 molecular sieve sephadex chromatography post desalination, lyophilizing gets the pure product of white cotton-shaped nucleic acid.Be stored in-20 ℃ of sample analyses that take a morsel: survey its purity and molecular weight and high performance liquid chromatography (HPLC) survey purity with high performance capillary electrophoresis and be more than 90%, it is entirely true that the dna sequencing method is measured sequence, and nuclear magnetic resonance method is surveyed the thioated degree greater than 98.5%.2 six kinds of KGCD series of embodiment decoy nucleic acid is to the growth inhibited of pulmonary carcinoma NCI-H460 cell
The decoy nucleic acid experimental group that lung cancer cell line NCI-H460 is divided into positive controls, negative control group, blank group and six kinds of KGCD series, be inoculated in 96 well culture plates in the RPMI RPMI-1640 that contains 10% hyclone respectively, inoculation quantity is 2-3 * 10
4/ hole, cultivate after 24 hours, be replaced with serum-free medium, the blank group only adds 0.6 μ l/ hole empty liposome, all the other all add 0.6 μ l/ hole liposome is the different decoy nucleic acid of 200nM with final concentration, handle after 5 hours, be replaced with the RPMI RPMI-1640 that contains 10% hyclone, at 37 ℃, 5%CO
2Cultivate under the condition after 48 hours, with SRB dyeing, microplate reader is in λ
510nmMeasuring its OD value, and calculate cell survival rate, is 100% with blank group numerical value, makes cell growth inhibited figure.As seen from the figure: CRE represents the result of the test of positive controls, C represents the result of the test of negative control group, remaining the 6 groups result of the tests that are KGCD series decoy nucleic acid experimental group, this 6 kinds of KGCD series decoy nucleic acid all demonstrate in various degree inhibitory action to the NCI-H460 cell, and wherein the suppression ratio with KGCD101a and KGCD102 is the highest.
Embodiment 3KGCD101a and KGCD102decoy nucleic acid are to the growth inhibited of various cells
Handle following tumor cell line NCI-H460 (pulmonary carcinoma) respectively with KGCD101a and KGCD102decoy nucleic acid, CNE (nasopharyngeal carcinoma), U251 (glioma), MCF-7 (breast carcinoma), BEL-7402 (hepatocarcinoma) and normal cell strain: L-02 (hepatocyte) and NIH3T3, the lightest cylinder is represented negative control group (mismatch), and is less to various cell growth effects.And various growth of tumour cell are all had in various degree inhibitory action with KGCD101a and KGCD102decoy nucleic acid, and wherein U251 (glioma) and NCI-H460 (pulmonary carcinoma) are suppressed maximum, and less to the growth effect of normal cell strain.
Embodiment 4 medicine KGCD101a and KGCD102 are to the half lethal dose (IC of NCI-H460 cell
50)
KGCD101a and KGCD102 (5-200nM) with variable concentrations handle the NCI-H460 cell respectively, behind the cultivation certain hour, survey its OD value.From as Fig. 3 as can be seen, KGCD101a and KGCD102 have inhibitory action to cancerous cell under the condition of low concentration, and their half lethal dose is 30～50nM, is 30～50 μ g/ml, well below the standard (IC of screening anti-tumor medicine
50≤ 10 μ g/ml).
Embodiment 5 contains the pharmaceutical composition of decoy nucleic acid
Decoy nucleic acid medicine composition as animal and human's class vivo medicine-feeding is composed as follows:
Decoy nucleic acid KGCD101b:1mg/ml
Normal saline or phosphate buffer (PH 7.4): an amount of
Other several nucleic acid of the present invention also adopt same prescription.
Sequence table
＜110〉Ye Qing
＜120〉genetic switch medicine for treating tumor
<160>32
<210>1
<211>9
<212>DNA
＜213〉artificial sequence
<400>1
stgacgtmr?9
<210>2
<211>8
<212>DNA
＜213〉artificial sequence
<400>2
stgastma?8
<210>3
<211>8
<212>DNA
＜213〉artificial sequence
<400>3
ttacctca?8
<210>4
<211>7
<212>DNA
＜213〉artificial sequence
<400>4
tctctta?7
<210>5
<211>12
<212>DNA
＜213〉artificial sequence
<400>5
raccacgtgg?ty?12
<210>6
<211>34
<212>DNA
＜213〉artificial sequence
<400>6
gcctgacgtc?aggggacttt?ccctgacgtc?aggc?34
<210>7
<211>24
<212>DNA
＜213〉artificial sequence
<400>7
gtttcgcggt?gacgtcaccc?tttc?24
<210>8
<211>24
<212>DNA
＜213〉artificial sequence
<400>8
gaaagggacg?tacgtccgcg?aaac?24
<210>9
<211>14
<212>DNA
＜213〉artificial sequence
<400>9
gaaaggcgcg?aaac?14
<210>10
<211>21
<212>DNA
＜213〉artificial sequence
<400>10
cgcttgc
tga?ctcagccgga?a?21
<210>11
<211>21
<212>DNA
＜213〉artificial sequence
<400>11
ttccggc
tga?gtcagcaagc?g?21
<210>12
<211>35
<212>DNA
＜213〉artificial sequence
<400>12
gatcg
tgact?cagcgcgatt?ttcgcgc
tga?gtcac?35
<210>13
<211>42
<212>DNA
＜213〉artificial sequence
<400>13
actctctcag?tc
tgac?tcat?gctctcagca?
tgagtcagac?tg?42
<210>14
<211>21
<212>DNA
＜213〉artificial sequence
<400>14
ctcaacc
tga?ctcagaaccc?t?21
<210>15
<211>21
<212>DNA
＜213〉artificial sequence
<400>15
agggttcact?cagtggttga?g?21
<210>16
<211>21
<212>DNA
＜213〉artificial sequence
<400>16
ccggggctga?ctcaggggca?a?21
<210>17
<211>23
<212>DNA
＜213〉artificial sequence
<400>17
ttgcccctaa?cggttagccc?cgg?23
<210>18
<211>37
<212>DNA
＜213〉artificial sequence
<400>18
ttacctcatt?acctcagccc?gtgaggtaat?gaggtaa?37
<210>19
<211>40
<212>DNA
＜213〉artificial sequence
<400>19
ttacctcatt?acctcattac?ctcatgaggt?aatgaggtaa?40
<210>20
<211>38
<212>DNA
＜213〉artificial sequence
<400>20
gagcccgtcg?ttacctcatc?agcccgtgat?gaggtaac?38
<210>21
<211>32
<212>DNA
＜213〉artificial sequence
<400>21
ttacctcatt?acgtcattac?gtcattacct?ca?32
<210>22
<211>22
<212>DNA
＜213〉artificial sequence
<400>22
tgaggtaatg?ataatgaggt?aa 22
<210>23
<211>26
<212>DNA
＜213〉artificial sequence
<400>23
tcaccatctc?ttatgcggtt?gaatag?26
<210>24
<211>26
<212>DNA
＜213〉artificial sequence
<400>24
ctattcaacc?gcataagaga?tggtga?26
<210>25
<211>35
<212>DNA
＜213〉artificial sequence
<400>25
tctcttatga?ctaatctctt?attagtcata?agaga 35
<210>26
<211>26
<212>DNA
＜213〉artificial sequence
<400>26
tctcttagct?ctcttagcct?ctctta?26
<210>27
<211>17
<212>DNA
＜213〉artificial sequence
<400>27
taagagaggc?taagaga?17
<210>28
<211>19
<212>DNA
＜213〉artificial sequence
<400>28
gagtctctta?ctcccgcgg?19
<210>29
<211>17
<212>DNA
＜213〉artificial sequence
<400>29
ccgcgggtct?cttagac?17
<210>30
<211>32
<212>DNA
＜213〉artificial sequence
<400>30
cacggaacga?gaccacgtgg?tctcgttccg?tg?32
<210>31
<211>24
<212>DNA
＜213〉artificial sequence
<400>31
ttctctgacc?acgtggtcct?cttc?24
<210>32
<211>23
<212>DNA
＜213〉artificial sequence
<400>32
gaagaggctc?tcttagcaga?gaa?23
Claims (4)
1. genetic switch medicine for treating tumor is characterized in that adding sequence 11 or sequence 14 by sequence 10 adds the double-stranded dna oligo that sequence 15 constitutes and form.
2. the described dna oligo of root a tree name claim 1, it has the phosphodiester bond of any one base group modification in sulfenyl, methyl, the amide groups.
3. the pharmaceutical composition formed of described dna oligo of claim 1 and normal saline, phosphate buffer or liposome.
4. the application of the described dna oligo of claim 1 in the preparation antitumor drug.
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| CN 200310113538 CN1251764C (en) | 2002-03-28 | 2002-03-28 | Tumour gene Switch medicine |
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|---|---|---|---|
| CN 200310113538 CN1251764C (en) | 2002-03-28 | 2002-03-28 | Tumour gene Switch medicine |
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| CNB021128189A Division CN1240439C (en) | 2002-03-28 | 2002-03-28 | Genetic switch medicine for treating tumor |
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| CN1251764C true CN1251764C (en) | 2006-04-19 |
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| CN105255862B (en) | 2014-12-30 | 2018-05-22 | 南京艾德凯腾生物医药有限责任公司 | It is a kind of to be used to prepare the nucleic acid oligomer for inhibiting tumour growth drug and its application |
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2002
- 2002-03-28 CN CN 200310113538 patent/CN1251764C/en not_active Expired - Fee Related
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