CN105294835A - LDV modified 5-fluorouracil, preparation therefor, nanostructure thereof, vigor thereof and application thereof - Google Patents
LDV modified 5-fluorouracil, preparation therefor, nanostructure thereof, vigor thereof and application thereof Download PDFInfo
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Abstract
The present invention discloses a compound 5-fluorouracil-1-acetyl-Leu-Asp-Val, and Leu-Asp-Val is LDV for short. The present invention discloses a preparation method for LDV modified 5-fluorouracil, a nanostructure of the LDV modified 5-fluorouracil, an antitumor effect of the LDV modified 5-fluorouracil, and effects of LDV modified 5-fluorouracil for resisting adhesion, invasion and migration of antitumor cells, and elucidates applications of the LDV modified 5-fluorouracil in medical science.
Description
Technical field
The present invention relates to 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val.Abbreviation is LDV.Relate to its preparation method, relate to its nanostructure, relate to its inside and outside antitumor action, relate to the effect of its antitumor cell Adhesion, Invasion and migration.Thus the present invention relates to it and preparing antitumor drug, prepare antitumor cell migration and adhere to and attack the application in medicine.The invention belongs to biomedicine field.
Background technology
5 FU 5 fluorouracil is a clinical conventional antitumor drug, and it can be used for the treatment of kinds cancer, cancer of the stomach, liver cancer, colon etc.Although 5 FU 5 fluorouracil has good curative effect for the treatment of tumour, also there are some problems that can not be ignored in it.Such as Half-life in vivo is short, and oral administration biaavailability is low, and dosage is close with toxic dose, and toxic side effect is large.In order to the antitumor action of 5 FU 5 fluorouracil can be played better, improve its tumor killing effect, reduce toxic side effect.People have carried out a large amount of modification work to 5 FU 5 fluorouracil for many years, have synthesized multiple 5 FU 5 fluorouracil derivative, as introduced glucose, porphyrins on 5 FU 5 fluorouracil, metal complexes, amino acid and small peptide etc.Regrettably these effort do not obtain the result expected.In the structural modification of 5 FU 5 fluorouracil, also has the study on the synthesis introduced by RGD tripeptides.Because in the research that some are important, RGD tripeptides has confirmed do not have recognition reaction to integrin receptor, so this modification chemical work that to be a kind of target ambiguous, to 5 FU 5 fluorouracil without any biological significance.
RGD tetrapeptide, namely RGDS, RGDF and RGDV are integrin alphas
vβ
3blocker, there is antithrombotic and Anti cell adhesion active.LAM-111 (laminin-111) participates in the growth of tumour, infiltration, transfer, multiple physiological process such as adhesion and vasculogenesis.Applicant is also once with the β-carboline-3-carboxylic acid that amino acid modified tetrahydro-beta-carboline-3-carboxylic acid, β-carboline-3-carboxylic acid and 1-position replace, and the β-carboline-3-carboxylic acid of the tetrahydro-beta-carboline-3-carboxylic acid or the replacement of 1-position that comprise the replacement of 1-position prepares efficient antithrombotic agent or antineoplastic agent.Fig. 1 is the representative of the structure type that contriver creates.Although contriver has paid large quantity research energy, screen hundreds of compound, never there is the antitumor and antitumor compound adhering to infiltration and transporting action simultaneously.
Contriver is in the analysis structure of hundreds of compound and the basis of activity change, recognize LDV and 5 FU 5 fluorouracil coupling, the 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val of formation can have antitumor adhesion with antitumor cell simultaneously and infiltrate and transporting action.Based on this understanding, inventors herein propose the present invention.
Summary of the invention
First content of the present invention is to provide the 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val of structure below.
Second content of the present invention is to provide the preparation method of 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val, and the method is made up of following steps:
(1) 60 DEG C of 5 FU 5 fluorouracil, at ethyl bromoacetate solution, reacts 10h in the aqueous solution of 30%NaOH, and then at ice-water bath, concentrated hydrochloric acid forms 5 FU 5 fluorouracil-1-guanidine-acetic acid under existing;
(2) liquid phase synthesis is adopted to prepare Leu-Asp (OBzl)-Val-OBzl;
(3) by Leu-Asp (OBzl)-Val-OBzl and the coupling of 5 FU 5 fluorouracil-1-guanidine-acetic acid, 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp (OBzl)-Val-OBzl is prepared;
(4) by 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp (OBzl)-Val-OBzl deprotection, preparation 55-Fluracil-1-base acetyl-Leu-Asp-Val.
3rd content of the present invention evaluates the antiproliferation of 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val.
4th content of the present invention evaluates 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val to the restraining effect of mice bearing S180 tumor propagation.
5th content of the present invention evaluates 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val antitumor cell to adhere to, invasion and attack and transporting action.
Accompanying drawing explanation
Fig. 1. the structure type representative of the active compound for anti tumor that contriver creates, in formula, AA is L-amino acid or glycine.
The synthetic route .i of Fig. 2 .5-Fluracil-1-base acetyl-Leu-Asp-Val) DCC, HOBt, NMM, THF; Ii) hydrogenchloride/ethyl acetate solution (4N); Iii) CH
3oH, 2NNaOH; Iv) NaOH (30%), 60 DEG C, ethyl bromoacetate, dense HCl.
Fig. 3 .5-Fluracil-1-base acetyl-Leu-Asp-Val is in pure water solution 1 × 10
-5transmission electron microscope photo under M concentration.
Embodiment
In order to set forth the present invention further, provide a series of embodiment below.These embodiments are illustrative completely, and they are only used for being specifically described the present invention, not should be understood to limitation of the present invention.
Embodiment 1 prepares 5 FU 5 fluorouracil-1-guanidine-acetic acid
1.30g (10mmol) 5 FU 5 fluorouracil is placed in 100mL eggplant bottle, add the aqueous dissolution of 10mLNaOH (30%), reaction is heated to 60 DEG C, treat to dissolve completely, slow dropping 1.75mL ethyl bromoacetate solution, constant temperature 60 DEG C reaction 12h, TLC (ethyl acetate: Glacial acetic acid: water=5: 2: 0.5) show reaction and complete.Reaction solution is cooled to room temperature, under ice bath, slowly drips concentrated hydrochloric acid, regulate pH to 2, stir 0.5h, there is colorless solid to separate out, filter, filter cake is washed three times with frozen water and ether respectively, shady and cool place dries, and obtaining 0.56g (30%) title compound, is colourless powder.ESI-MS(m/e)：189[M+H]
+.
1HNMR(500MHz，DMSO-d
6)：δ/ppm＝13.21(s，1H)，11.89(d，J＝4.5Hz1H)，8.07(d，J＝6.5Hz1H)，4.37(s，2H)。
Embodiment 2 prepares Boc-Asp (OBzl)-Val-OBzl
22.10g (68.30mmol) Boc-Asp (OBzl) the anhydrous THF of 200mL is dissolved in 500mL reaction flask, add 10.10g (75.13mmol) N-hydroxyl benzotriazole (HOBt) and 16.90g (81.90mmol) dicyclohexylcarbodiimide (DCC) under ice bath, stir 30min and obtain reactant A.Separately the anhydrous THF of 27.12g (68.30mmol) TosVal-OBzl 150mL is dissolved in 250mL reaction flask, slowly drips N-methylmorpholine (NMM) under ice bath and regulate pH to 9, obtain reactant B.Under ice bath, reactant B is added in reactant A, slowly drip N-methylmorpholine (NMM) and regulate pH to 9, stirred at ambient temperature reaction 12h, thin-layer chromatography TLC (sherwood oil: acetone: Glacial acetic acid=4: 1: 0.1) show reaction and complete.Reacting liquid filtering, removal of solvent under reduced pressure, residue column chromatography for separation (sherwood oil-acetone system), obtained 18.28g (52.3%) Boc-Asp (OBzl)-Val-OBzl.ESI-MS(m/e)：513[M+H]
+。
Embodiment 3 prepares HClAsp (OBzl)-Val-OBzl
Under ice-water bath, the ethyl acetate solution (4N) of 18.28g (35.7mmol) Boc-Asp (OBzl)-Val-OBzl and 36mL hydrogenchloride, stirring at room temperature reaction 2h, thin-layer chromatography TLC (methylene dichloride: methyl alcohol: Glacial acetic acid=20: 1: 0.1) show reaction and complete.Concentrating under reduced pressure removing ethyl acetate, residue carries out concentrating under reduced pressure with except de-chlorine hydride with a small amount of ether repeatedly, obtains 14.61g (91.23%) HClAsp (OBzl)-Val-OBzl.ESI-MS(m/e)：411[M-H]
-。
Embodiment 4 prepares Boc-Leu-Asp (OBzl)-Val-OBzl
9.80g (47.31%) Boc-Leu-Asp (OBzl)-Val-OBzl is obtained by 7.53g (32.6mmol) Boc-Leu and 14.60g (32.6mmol) HClAsp (OBzl)-Val-OBzl according to the operation of embodiment 2.ESI-MS(m/e)：626[M+H]
+。
Embodiment 5 prepares HClLeu-Asp (OBzl)-Val-OBzl
According to the operation of embodiment 3, obtain 7.74g (89.70%) HClLeu-Asp (OBzl)-Val-OBzl by 9.80g (15.4mmol) Boc-Leu-Asp (OBzl)-Val-OBzl.ESI-MS(m/e)：524[M-H]
-。
Embodiment 6 prepares 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp (OBzl)-Val-OBzl (2)
2.59g (13.80mmol) 5 FU 5 fluorouracil-1-guanidine-acetic acid 15mL dry DMF is dissolved in 100mL reaction flask, add 2.13g (15.18mmol) N-hydroxyl benzotriazole (HOBt) and 3.41g (16.56mmol) dicyclohexylcarbodiimide (DCC) under ice bath, stir 30min and obtain reactant A.Separately 7.74g (13.8mmol) HClLeu-Asp (OBzl)-Val-OBzl 20mL dry DMF is dissolved in 100mL reaction flask, slowly drips N-methylmorpholine (NMM) under ice bath and regulate pH to 9, obtain reactant B.Under ice bath, reactant B is added in reactant A, slow dropping N-methylmorpholine (NMM) regulates pH to 9, stirred at ambient temperature reaction 12h, thin-layer chromatography TLC (methylene dichloride: methyl alcohol: Glacial acetic acid=15: 1: 0.1) show reaction and complete.Reacting liquid filtering, removal of solvent under reduced pressure, residue column chromatography for separation (methylene chloride-methanol system), obtained 1.45g (15.21%) 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp (OBzl)-Val-OBzl, ESI-MS (m/e): 696 [M+H]
+.
1h-NMR (300MHz, DMSO-d
6): δ/ppm=11.84 (s, 1H), 8.43 (m, 2H), 8.00-7.93 (m, 2H), 7.35 (m, 10H), 5.16-5.04 (m, 4H), 4.70 (m, 1H), 4.36 (m, 3H), 4.23-4.35 (m, 1H), 2.89-2.61 (m, 2H), 2.50 (s, 1H), 2.08-2.01 (m, 1H), 1.64-1.58 (m, 1H), 1.47-1.44 (m, 2H), 0.88-0.82 (m, 12H).
Embodiment 7 prepares 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val (3)
Under ice bath, in NaOH methanol aqueous solution (2N), stirring reaction 2.5h, thin-layer chromatography TLC (methylene dichloride: methyl alcohol: Glacial acetic acid=15: 1: 0.1) and (ethyl acetate: Glacial acetic acid: water=5: 2: 1) show reaction complete.Obtained 0.37g (36%) 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val is colorless solid powder, ESI-MS (m/e): 516 [M+H]
+dEG C .mp:192.2-193.2; [α]
d 25=-30.70 (c=0.3, CH
3oH) .IR (KBr): 3282,3267,3068,2972,1699,1683,1564,1417,1373,1276,1230,1174,1033cm
-1.
1h-NMR (500MHz, DMSO-d
6) :/ppm=8.46 (s, 2H), 8.04-8.03 (m, 1H), 7.49-7.47 (m, 1H), 4.51-4.25 (m, 5H), (2.58-2.53 m, 1H), 2.38-2.34 (m, 1H), 1.98-1.97 (m, 1H), (1.60-1.57 m, 1H), 1.45-1.44 (m, 2H), 0.85-0.77 (m, 12H). purity: 95.92% moving phase: CH
3oH: H
2o: Glacial acetic acid=95: 5: 0.1, retention time: 7.94min.
Experimental example 1 measures the transmission electron microscope photo of compound 3
By compound 3 according to 1 × 10
-5the pure water solution of the concentration configuration compound of M, is layered on uniformly on copper mesh, observes the self-assembly property of compound under transmission electron microscope (TEM, JEM-1230, JEOL).The photo obtained is as Fig. 3.Result shows, compound 3 all can form nano particle in water, and diameter is at 40-400nm.
Experimental example 2 measures the cytotoxicity of compound 3 pairs of cells
1) substratum of compound 3 of the present invention containing 0.1%DMSO is mixed with desired concn.
2) tumour cell of experiment is HepG
2(human liver cell cancer cells), HL60 (human promyelocytic leukemia), BEL-7402 (human liver cancer cell), MCF-7 (human breast cancer cell), HeLa (human cervical carcinoma cell), U-2OS (human osteosarcoma cell), S180 (mouse ascites oncocyte), L02 (Human normal hepatocyte) and Haca-T (strain of people's epidermis normal cell).
3) experimental technique HL-60, BEL-7402, MCF-7 and S180 cell selects RPMI-1640 substratum; HeLa, HepG
2, U-2OS, L02 and Haca-T cell selects DMEM substratum.In substratum all containing 10% through the foetal calf serum and 1 × 10 of deactivation
5u/L penicillin and 100mg/L Streptomycin sulphate.
Attached cell HepG
2, the cultivation of MCF-7, BEL-7402, HeLa, Haca-T, U-2OS and half attached cell S180: respectively that growth conditions is good, is in the cell of logarithmic phase with 3 × 10
4the density of individual/mL is inoculated in 96 orifice plates, and every hole 100 μ L, is placed in 37 DEG C and 5%CO
2cell incubation case in cultivate 4 hours, then add by the concentration gradient preset the solution that the compound 3 through sterilising treatment is mixed with the substratum containing 0.1%DMSO, every hole 25 μ L, control group adds the solvent of isopyknic sample dissolution.Continue cultivation after 48 hours, every hole adds the MTT solution that 25 μ L concentration are 5mg/mL, is placed in 37 DEG C and 5%CO
2cell incubation case in cultivate 4 hours.After careful removing supernatant liquor, every hole adds the DMSO of 100 μ L, and about 10min dissolve purple of vibrating residue (first a ceremonial jade-ladle, used in libation), detects O.D. (absorbancy) value immediately in microplate reader, and wavelength is 570nm.
The cultivation of suspension cell HL60: respectively that growth conditions is good, is in the cell of logarithmic phase with 5 × 10
4the density of individual/mL is inoculated in 96 orifice plates, every hole 100 μ L, then adds by the concentration gradient preset the solution that the compound 3 through sterilising treatment is mixed with the substratum containing 0.1%DMSO, every hole 25 μ L, control group adds the solvent of isopyknic sample dissolution, is placed in 37 DEG C and 5%CO
2cell incubation case in cultivate 48 hours.Every hole adds the MTT solution that 25 μ L concentration are 5mg/mL, and continuing the condition that is placed in is 37 DEG C and 5%CO
2cell incubation case in cultivate 4 hours.The centrifugal 10min of 2500rpm, careful sucking-off supernatant liquor, every hole adds 100 μ LDMSO, and about 10min dissolve purple of vibrating residue (first a ceremonial jade-ladle, used in libation), detects O.D. (absorbancy) value immediately in microplate reader, and wavelength is 570nm.
The activity of compound 3 inhibition tumor cell propagation under each concentration is obtained by following formula:
Cell proliferation (%)=(the average O.D. value of compound 3 groups average O.D. value/control group) × 100%, experiment repetition 3 times, maps to drug level with cell proliferation, obtains IC by graphing method
50(half effective inhibition concentration) value.
4) the results are shown in Table 1 and table 2.Result shows, in vitro in cytotoxicity test, have rated compound 3 and shows weak cytotoxicity in the concentration of 34.61+5.36 to MCF-7.Only the high density of 100 and 200 μMs to Bel-7402, HepG
2, HL60, U-2OS, HeLa, S180, L02 and Haca-T etc. 9 strain tumour cell show weak cytotoxicity.
Table 1 compound 3 in vitro cytotoxic effect (IC
50, mean value ± SD μM)
Table 2 compound 3 in vitro cytotoxic effect (IC
50, mean value ± SD μM)
The anti-tumor in vivo of experimental example 3 assessing compound 3 is active
1) compound 3 physiological saline solution of the present invention, 5 FU 5 fluorouracil physiological saline solution as positive control, with physiological saline as negative control;
2) compound 3 and the equal gastric infusion of physiological saline, the dosage of compound 3 is 10 μm of ol/kg, and the dosage of physiological saline is 0.2mL/20g, the dosage of 5 FU 5 fluorouracil be 10 μm of ol/kg and dosage be 150 μm of ol/kg, successive administration 7 days, altogether administration 7 times.
3) laboratory animal is ICR male mice (cleaning grade), body weight 20 ± 2g, often organizes 12 mouse.
4) knurl source is mouse S 180 sarcoma, purchased from Department Of Medicine, Peking University's animal experimental center, and maintenance of going down to posterity voluntarily.
5) extract and inoculate eugonic S180 ascitic tumor knurl liquid under animal model and treatment aseptic condition, the liquid of (1: 2) is become fully to mix with normal saline dilution, by freshly prepared 0.2% Trypan Blue of tumor cell suspension, by white blood cell count(WBC) method counting after mixing, contaminate blue person for dead cell, tinter is not viable cell, and is calculated as follows cell concn and cell survival rate.
Viable count/4 × 10 in the block plaid of cell concn=4
4× extension rate=cell count/mL
Cell survival rate=viable count/(viable count+dead cell number) × 100%
Knurl liquid homogenate method survival rate being greater than 90% is prepared into 2.0 × 10
7the cell suspension of individual/mL, in the subcutaneous vaccination of mouse armpit, 0.2mL/ only, manufactures S180 tumor-bearing mice.After tumor inoculation 24h, treatment group mouse oral administration of compound every day 3,5 FU 5 fluorouracil or physiological saline, dosage is same as above, successive administration 7 days, altogether administration 7 times.8th day, claim Mouse Weight, etherization, de-cervical vertebra puts to death mouse, then fixes the right armpit tumor location of mouse with tweezers, cuts off skin, expose tumour, blunt separation, weighs, and is calculated as follows tumour inhibiting rate: the average knurl of tumour inhibiting rate %=(the average knurl of negative control group heavy-the average knurl weight of compound 5 groups)/negative control group heavy × 100%.Experimental data adopts t inspection and variance analysis, and knurl is heavy to be represented with mean value+SDg.The results are shown in Table 3.Can find out, under the oral dosage of 10nmol/kg, 10 μm of ol/kg, the dosage of physiological saline is 0.2mL/20g, the dosage of 5 FU 5 fluorouracil be 10 μm of ol/kg and dosage be 150 μm of ol/kg, the knurl of compound 3 treatment group mouse heavy with physiological saline group phase and 5 FU 5 fluorouracil (10 μm of ol/kg) group than tool significant difference.Compare 5 FU 5 fluorouracil (150 μm of ol/kg) do not have significant difference by group.Visible, the effective dose of compound 3 is lower than 5 FU 5 fluorouracil 15 times.
Table 3 compound 3 is on the impact of S180 tumor weight
g
N=12; A) with physiological saline group and 5 FU 5 fluorouracil (10 μm of ol/lg) group than P<0.01, compare P>0.05 with 5 FU 5 fluorouracil (150 μm of ol/kg) group.
The extracorporeal anti-tumor cell adhesion activity of experimental example 4 assessing compound 3
1) 5 FU 5 fluorouracil and the DMEM substratum of compound 3 containing 0.1%DMSO are mixed with the solution that concentration is 100 μMs.
2) cell is HepG
2.
3) Fn (people's fibronectin).
4) experimental technique
With PBS, Fn is mixed with the solution that concentration is 100 μ g/mL, adds in 96 well culture plates by 100 μ L/ holes, culture plate is placed in 4 DEG C of refrigerator overnight.Next day, absorb and do not wrap by Fn solution, wash 1 time with PBS, every hole adds the PBS solution 30 μ L shrouding containing 2%FBS, at 37 DEG C and 5%CO
2incubator in hatch 3 hours, discard each hole solution.By good for growth conditions, be in the HCCLM3 cell of logarithmic phase with 5 × 10
4the density of individual/mL is inoculated in bag by 96 orifice plates of Fn, and every hole 100 μ L, adds the solution of 25 μ L compounds 3 simultaneously, makes its final concentration be 20nM, at 37 DEG C and 5%CO
2cultivate 2 hours in incubator, wash away the cell do not adhered to PBS, after discarding PBS, every hole adds the MTT solution that 25 μ L concentration are 5mg/mL, is placed in 37 DEG C and 5%CO
2hatch 4 hours in incubator, after careful removing supernatant liquor, every hole adds 100 μ LDMSO, and vibrate about 10min dissolution precipitation, detects O.D. (absorbancy) value immediately under microplate reader 570nm wavelength.The calculation formula of adherence inhibition rate is as follows: adherence inhibition rate (%)=[1-(the OD value of the OD value/blank group cell of compound 3 groups of cells)] × 100%; Experimental data statistics all adopts t inspection and variance analysis, and adherence inhibition rate represents with mean value ± SD.
5) the results are shown in Table 4.As can be seen from result, when concentration is 20nM, the obvious anti-HepG of compound 3
2cell and FN adhere to.Suppress SACC-LM cell to be compared with in the of 1 μM with the effective concentration of ECM and platelet adhesion reaction with Leu-Asp-Val disclosed in contriver, the effective concentration of compound 3 reduces 50 times.
The extracorporeal anti-tumor cell adhesion activity of table 4 compound 3
n＝3
The extracorporeal anti-tumor cell-invasive activity of experimental example 5 assessing compound 3
1) 5 FU 5 fluorouracil and the DMEM substratum of compound 3 containing 0.1%DMSO are mixed with the solution that concentration is 100 μMs.
2) cell is HepG
2.
3) matrigel is matrigel.
4) experimental technique
The frozen matrigel matrigel4 DEG C in-20 DEG C of refrigerators is spent the night, liquefy; Get 720 μ L plasma-free DMEM medium, add 180 μ LMatrigel, mixing, room on the polycarbonate membrane being added to Transwell cell, 100 μ L/, put into 37 DEG C and 5%CO
25h is hatched in incubator.Absorb residual liquid in cell, every hole adds 50 μ LDMEM substratum, 37 DEG C and 5%CO
230min is hatched in incubator.
HepG
2after cell dissociation, wash 3 times with plasma-free DMEM medium, counting, be made into cell suspension, density is 5 × 10
5individual/mL.Every hole adds 100 μ L cell suspensions, adds the solution that 25 μ L add 25 μ L5-Fluracils and compound 3 simultaneously simultaneously, makes its final concentration be 20nM.Blank adds the solution that 25 μ L prepare containing the DMEM substratum of 0.1%DMSO.Lower room adds 600 μ L plasma-free DMEM medium, at 37 DEG C and 5%CO
2cultivate 48 hours in incubator.
Wipe the cell of matrigel and upper indoor with cotton swab after, with the paraformaldehyde fixed cell 30min of 4%.Absorb stationary liquid, wash 3 times with PBS, with the Viola crystallina dye liquor dyeing 30min of 0.1%.Absorb staining fluid, wash 3 times with PBS.
Choose 9 roughly the same visuals field at each cell to observe, take pictures, counting.Experimental data statistics all adopts t inspection and variance analysis, and the cell count of invasion and attack represents with mean value ± SD.
5) the results are shown in Table 5.Can find out, compound 3 is under the concentration of 20nM compared with blank group, and the cell count that invasion and attack occur has significant difference.Suppress the effective concentration of SACC-LM cell invasion to be compared with in the of 1 μM with Leu-Asp-Val disclosed in contriver, the effective concentration of compound 3 reduces 50 times.
The extracorporeal anti-tumor cell-invasive activity of table 5 compound 3
N=9; A) p<0.01. is compared with blank group and 5 FU 5 fluorouracil group
The extracorporeal anti-tumor cell migration of experimental example 6 assessing compound 3 is active
1) 5 FU 5 fluorouracil and 3 is mixed with the DMEM substratum containing 0.1%DMSO the solution that concentration is 100 μMs.
2) cell is HepG
2.
3) experimental technique
HepG
2after cell dissociation, wash 3 times with plasma-free DMEM medium, counting, be made into cell suspension, density is 2 × 10
6individual/mL.Every hole adds 100 μ L cell suspensions, adds the solution that 25 μ L add 25 μ L5-Fluracils and compound 3 simultaneously simultaneously, makes its final concentration be 20nM.Blank adds the solution that 25 μ L prepare containing the DMEM substratum of 0.1%DMSO.Lower room adds 600 μ L plasma-free DMEM medium, at 37 DEG C and 5%CO
2cultivate 6 hours in incubator.
Wipe the cell of upper indoor with cotton swab after, with the paraformaldehyde fixed cell 30min of 4%.Absorb stationary liquid, wash 3 times with PBS, with the Viola crystallina dye liquor dyeing 30min of 0.1%.Absorb staining fluid, wash 3 times with PBS.
Choose 9 roughly the same visuals field at each cell to observe, take pictures, counting.Experimental data statistics all adopts t inspection and variance analysis, and the cell count of invasion and attack represents with mean value ± SD.
4) the results are shown in Table 6.Can find out, under 20nM concentration, compound 3 is compared with blank group, and the cell count that invasion and attack occur all significantly reduces, and illustrates that compound 3 has obvious anti-HepG
2cell invasion effect.Suppress the effective concentration of SACC-LM cell migration to be compared with in the of 1 μM with Leu-Asp-Val disclosed in contriver, the effective concentration of compound 3 reduces 50 times.
The extracorporeal anti-tumor cell migration of table 6 compound 3 is active
N=9; A) p<0.01 is compared with blank group and 5 FU 5 fluorouracil group.
Claims (5)
1. the compound 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val of structure below.
2. the preparation method of the 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val of claim 1, the method is made up of following steps:
(1) 60 DEG C of 5 FU 5 fluorouracil, at ethyl bromoacetate solution, reacts 10h in the 30%NaOH aqueous solution, and then at ice-water bath, concentrated hydrochloric acid forms 5 FU 5 fluorouracil-1-guanidine-acetic acid under existing;
(2) liquid phase synthesis is adopted to prepare Leu-Asp (OBzl)-Val-OBzl;
(3) by Leu-Asp (OBzl)-Val-OBzl and the coupling of 5 FU 5 fluorouracil-1-guanidine-acetic acid, 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp (OBzl)-Val-OBzl is prepared;
(4) by 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp (OBzl)-Val-OBzl deprotection, 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val is prepared.
3. the nanostructure of the 5 FU 5 fluorouracil-1-base acetyl-Leu-Asp-Val of claim 1.
4. 5 FU 5 fluorouracil-1-base acetyl-the Leu-Asp-Val of claim 1 is preparing the application in antitumor drug.
5. 5 FU 5 fluorouracil-1-base acetyl-the Leu-Asp-Val of claim 1 is preparing the application in antitumor cell Adhesion, Migration and invasion and attack medicine.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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