阅读说明：本技术 Pcps及其在制备抗肿瘤药物中的应用 (PCPS and application thereof in preparation of antitumor drugs ) 是由 王群 刘芳艳 张付利 张磊 贾爽爽 滕铁山 汤昆 余琦 胡彬 贾航 姜笑梅 芦 于 2020-06-09 设计创作，主要内容包括：本发明属于化工医药技术领域,涉及1,5-二[N-(3,5-二(2-(2-甲氧乙氧基)乙氧基)乙氧基)苄基-2,3,3-三甲基-5-磺酸基-3H-吲哚]五碳菁溴化盐染料(简称为PCPS)在制备抗肿瘤药物中的应用。MTT结果显示：PCPS能显著抑制结直肠癌细胞系DLD-1和HCT116细胞活力。动物实验结果显示：PCPS显著抑制人结直肠癌细胞系HCT116 BALB/C裸鼠皮下荷瘤生长,可用于制备抗肿瘤药物。本发明的化合物PCPS作为新型抗肿瘤药物或者其辅助成分进行开发,抑制肿瘤效果显著,将为治疗和治愈肿瘤提供新的治疗途径和手段。(The invention belongs to the technical field of chemical medicines, and relates to application of 1, 5-bis [ N- (3, 5-bis (2- (2-methoxyethoxy) ethoxy) benzyl-2, 3, 3-trimethyl-5-sulfo-3H-indole ] pentacycyanine bromide dye (PCPS for short) in preparation of antitumor drugs. MTT results show that: the PCPS can obviously inhibit the activity of the DLD-1 and HCT116 cells of the colorectal cancer cell lines. The results of animal experiments show that: the PCPS can obviously inhibit the growth of subcutaneous tumor-bearing tumors of nude mice with human colorectal cancer cell line HCT116BALB/C, and can be used for preparing antitumor drugs. The compound PCPS is developed as a novel anti-tumor medicament or an auxiliary component thereof, has obvious tumor inhibition effect, and provides a new treatment way and means for treating and curing tumors.)

1, 5-bis [ N- (3, 5-bis (2- (2-methoxyethoxy) ethoxy) benzyl-2, 3, 3-trimethyl-5-sulfo-3H-indole ] pentacyano cyanine bromide salt dye, which is characterized in that the dye is abbreviated as PCPS and has the following chemical structure:

2.1, 5-di [ N- (3, 5-di (2- (2-methoxyethoxy) ethoxy) benzyl-2, 3, 3-trimethyl-5-sulfo-3H-indole ] pentacyano cyanine bromide salt dye in the preparation of antitumor drugs.

3. The use of a PCPS in the preparation of an antineoplastic medicament, as claimed in claim 2, wherein the PCPS inhibits the cell viability of the colorectal cancer cell lines DLD-1 and HCT 116.

4. The use of PCPS in the preparation of an anti-tumor medicament as claimed in claim 3 wherein the concentration of PCPS inhibiting cancer cells is 10-25 μ M.

5. The use of a PCPS in the preparation of an anti-tumor medicament according to claim 3, wherein the PCPS inhibits the growth of subcutaneous tumor bearing cells of a colorectal cancer cell line DLD-1BALB/C nude mouse at a dose of 2.78 mg/kg.

6. The use of PCPS in the preparation of an anti-tumor medicament as claimed in claim 2 wherein PCPS exerts an anti-tumor effect by photothermal activity.

Technical Field

The invention belongs to the technical field of chemical medicines, and particularly relates to application of a novel pentamethine cyanine dye PCPS in preparation of antitumor drugs.

Background

In recent years, the incidence and mortality of malignant tumors at home and abroad are on an increasing trend, and the malignant tumors become important public health problems which are widely concerned by society, and the prevention and control of the tumors become the key points of the global health strategy. And colorectal cancer is stable in the prostate among malignant tumors causing human morbidity and mortality, and seriously threatens human health. At present, the malignant tumor treatment mainly comprises surgery and chemotherapy although various means exist, but the treatment can only maintain the short life of the patient and brings great pain to the patient. Therefore, the development of novel targeting drugs with small toxic and side effects and excellent antitumor performance is required by the public and is the aim of great efforts of researchers.

The design and synthesis of a novel pentamethine cyanine dye PCPS and the application thereof in preparing antitumor drugs are the first research of the subject group, and experiments show that the compound has the potential of treating colorectal cancer, and no research on the related antitumor activity of the compound exists at present.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a novel application of a novel cyanine dye as a medicament, in particular to an application of PCPS in preparing an anti-tumor medicament.

In order to achieve the purpose, the invention adopts the following technical scheme:

the novel pentamethine cyanine dye PCPS has the chemical structure shown in the specification.

The relevant properties are as follows:

chemical name: 1, 5-bis [ N- (3, 5-bis (2- (2-methoxyethoxy) ethoxy) benzyl-2, 3, 3-trimethyl-5-sulfo-3H-indole ] pentacyano cyanine bromide dye (PCPS for short)

The molecular formula is as follows: c₆₇H₉₃N₂O₂₂S₂ ^2-(ii) a Molecular weight: 1342.59, respectively; the detection mode is as follows:¹H NMR、¹c NMR and ESI-MS; the characteristics are as follows: a blue solid; the source is as follows: synthesized in the laboratory. Pharmacological properties: dissolved in water.

Further, the concentration of the PCPS having an antitumor effect is 6.25 to 100. mu.M.

The invention provides a method for inhibiting the activity of tumor cells in vitro, which is to add PCPS into a culture solution of the tumor cells, wherein the final concentration of the added PCPS is 6.25 to 100 mu M. The tumor cells were colorectal cancer cell lines DLD-1 and HCT 116.

The invention provides a method for inhibiting tumor growth in vivo, which comprises the step of injecting PCPS into a BALB/C nude mouse through a paraneoplastic tissue, wherein the injection dosage of the PCPS is 27.8 mg/kg. The in vivo model can be a colorectal cancer cell line HCT116BALB/C nude mouse subcutaneous tumor-bearing model.

The invention also provides an anti-tumor medicament, and the active component of the anti-tumor medicament is PCPS.

The PCPS provided by the invention plays an anti-tumor role through photo-thermal activity, namely, the anti-tumor medicine containing the PCPS as an active ingredient can obviously inhibit the activity of HCT116 and SW480 cells of colorectal cancer tumors through the photo-thermal effect.

The invention has the beneficial effects.

The invention provides an application of PCPS in preparing an anti-tumor medicament. MTT results show that: PCPS can inhibit the proliferation of DLD-1 and HCT116 cells of colorectal cancer in a dose-dependent manner. The results of animal experiments show that: PCPS can obviously inhibit the growth of subcutaneous tumor-bearing tumors of nude mice with human colorectal cancer cell line HCT116 BALB/C. The small molecular compound PCPS is developed as a new anti-tumor medicament or an auxiliary component thereof, has obvious tumor inhibition effect, and provides a new treatment way and means for treating and curing tumors.

Drawings

FIG. 1 structural identification of PCPS¹H NMR(A)、¹³C NMR (B) and ESI-MS (C) data.

FIG. 2. assay of PCPS inhibition of colorectal cancer DLD-1 and HCT116 cell viability.

FIG. 3. assay of PCPS inhibition of growth of subcutaneous tumor-bearing BALB/C nude mice of colorectal cancer HCT116 cells.

FIG. 4 measurement of the cell viability PTT and PDT performance of PCPS to inhibit DLD-1 and HCT116 from colorectal cancer.

Detailed Description

In order to make the technical purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is further described with reference to specific examples, but the implementation is intended to explain the present invention and should not be construed as a limitation of the present invention, and those who do not specify specific techniques or conditions in the examples follow the techniques or conditions described in the literature in the field or follow the product specification.

The experimental method comprises the following steps:

application example 1, PCPS Synthesis.

The synthetic route is as follows:

to a 50mL two-necked round bottom flask was added malondialdehyde bisbenzimide hydrochloride (26.5mg, 0.093mmol, 1.0eq), compound 5(119.9mg, 0.18mmol, 2.0eq), oxygen removed for 30min, oxygen removed glacial acetic acid 5mL and acetic anhydride 5mL were added, stirred for 10min, and reacted at 110 ℃ under argon for 3 h. TLC monitoring reaction is finished, cooling to room temperature, and rotary evaporation is carried out to remove the solvent to obtain a crude product. And (3) separating the crude product by column chromatography (200-mesh silica gel with 300 meshes, mobile phase: methanol: dichloromethane: 1:10) to obtain a blue solid compound Cy5-peg-SO 3: 49.0mg, yield: 39.2 percent. 1H NMR (400MHZ, DMSO-d6)8.40(d, J ═ 12.8Hz,2H),7.87(s,2H),7.62(d, J ═ 8.4Hz,2H),7.28(d, J ═ 8.4Hz,2H),6.51-6.36(m,9H),5.29(s,4H),4.00(m,8H),3.67(m,8H),3.53-3.46(m,24H),3.40-3.38(m,8H),3.20(s,12H),1.74(s, 12H); 13C NMR (100MHZ, DMSO-d6)173.80,160.06,155.02,145.27,142.24,140.40,137.27,126.51,126.25,120.11,110.46,105.21,104.23,100.03,71.27,69.91,69.78,69.59,68.79,67.27,58.05,49.07,46.65, 27.22; MS (ESI), calcd for [ M ] -1342.59, found 1342.56. The structure identification map is shown in FIG. 1, the structure identification 1H NMR (A) is shown in FIG. 1-A, the HRMS (B) data is shown in FIG. 1-B, and the ESI-MS data is shown in FIG. 1-C.

The inhibition of PCPS on the viability of the colorectal cancer cell lines DLD-1 and HCT116 cells was determined using the MTT method, example 2.

DLD-1 cells were as described in 3 × 10³Inoculating to 96-well plate with 5% CO₂100U/mL penicillin and 100. mu.g/mL streptomycin in RPMI 1640 complete medium was cultured at 37 ℃ for 24 hours, PCPS was added at different concentrations (3.12. mu.M, 6.25. mu.M, 12.5. mu.M, 25. mu.M, 50. mu.M, and 100. mu.M, respectively), 3 wells were set for each concentration, 0.4W near-infrared light was applied after 1 hour of drug action, each well was irradiated for 2 minutes, culture was continued for 24 hours, the culture solution was discarded, and the cell viability was measured with MTT reagent.

The determination method comprises the following steps: adding a pre-prepared MTT reaction solution into 15 mu L/hole, continuously culturing for 4h, sucking and removing the supernatant, adding DMSO into 100 mu L/hole to dissolve the reduction product, reacting for 5min in a dark place, reading the absorbance value at 490nm, and calculating the cell activity to determine the absorbance value of the PCPS intervention hole/control hole as the cell activity.

IC50 refers to the concentration of inhibitor at which cell growth is inhibited by half. This is the concentration of PCPS when the number of the colorectal cancer cell lines DLD-1 and HCT116 cells is half of that of the control group.

As a result: IC of PCPS on DLD-1 and HCT116 cells for colorectal cancer₅₀Values were 7.3 μ M, 10.3 μ M, respectively, see fig. 2, where a.pcps inhibits the determination of colorectal cancer HCT116 cell viability. Measurement of the inhibition of colorectal cancer DLD-1 cell viability by PCPS. A, P<0.05；**,P<0.01；***,P<0.001。

Application example 3, PCPS inhibits growth of subcutaneous tumor-bearing tumor of colorectal cancer HCT116 cell BALB/C nude mouse

The determination method comprises the following steps: establishing a colorectal cancer HCT116 cell BALB/C nude mouse subcutaneous tumor-bearing model in a subcutaneous injection mode, carrying out PCPS intervention treatment by tail vein injection according to the dose of 27.8mg/kg, simultaneously giving 0.4W near infrared illumination, carrying out euthanasia on nude mice, cutting tumor tissues, and determining the effect of PCPS on inhibiting the growth of the colorectal cancer HCT116 cell BALB/C nude mice subcutaneous tumor-bearing.

As a result: PCPS can obviously inhibit the growth of subcutaneous tumor-bearing tumors of a colorectal cancer cell line HCT116BALB/C nude mouse. See fig. 3, where a. tumor images under different treatments; B. comparing the heart index, the liver index, the spleen index, the lung index, the kidney index and the tumor weight of the nude mice under different treatments from top to bottom and from left to right in sequence; C. change curves of tumor volume under different treatments; D. tumor weight change curves for different treatments.

Application example 4 PCPS inhibition of colorectal cancer cell lines DLD-1 and HCT116 cell viability by photothermal Effect

DLD-1 and HCT116 cells were as described in 3 × 10³Perwell inoculation into 96 well plates, 5% CO₂100U/mL penicillin and 100 mug/mL streptomycin in RPMI 1640 complete medium, culturing at 37 ℃ for 24h, adding PCPS with different concentrations (3.12 muM, 6.25 muM, 12.5 muM, 25 muM, 50 muM and 100 muM respectively), setting 3 multiple wells for each concentration, placing a 96-well plate on ice after 1h of drug action, giving 0.4W near-infrared illumination, irradiating each well for 2min, continuing culturing for 24h, abandoning the culture solution, and measuring the cell viability by using an MTT reagent to preliminarily determine the photothermal performance of the PCPS.

DLD-1 and HCT116 cells were as described in 3 × 10³Perwell inoculation into 96 well plates, 5% CO₂100U/mL penicillin and 100. mu.g/mL streptomycin in RPMI 1640 complete medium was cultured at 37 ℃ for 24 hours, PCPS was added at different concentrations (3.12. mu.M, 6.25. mu.M, 12.5. mu.M, 25. mu.M, 50. mu.M, 100. mu.M, respectively), while 5mM N-acetyl-cysteine (NAC) was added, 3 wells were set for each concentration, after 1 hour of drug action, 0.4W near infrared light was applied, each well was irradiated for 2min, culture was continued for 24 hours, the culture solution was discarded, and MTT reagent was used to determine the photodynamic properties of PCPS.

Accurately weighing a certain amount of sample PCPS by using an analytical balance to prepare 1 × 10^-3Taking out the mother liquor, naturally raising the temperature to room temperature, taking 50 mu L of the mother liquor into a 5mL volumetric flask by using a liquid transfer gun, adding water to a scale mark, and shaking up to obtain 1 × 10^-5M in an aqueous solution to be tested. Taking 2mL of sample aqueous solution to be detected into a 24-pore plate, adding 3 mu L of SOSG probe methanol solution with fixed concentration by using a pipette gun, and supplementing calculated amount of methanol to ensure that the final detection concentration of the SOSG probe is 1.5 mu M, wherein the volume content of the methanol in the solution is 2%. After shaking and mixing, a laser (660nm, 0.5 w/cm) is used²) The sample solution was irradiated for 2 min. After irradiation, the sample is transferred to a cuvette quickly, and the fluorescence emission spectrum of the sample at 500nm to 600nm is measured immediately on a fluorescence spectrophotometer, with the excitation wavelength of 494nm, Ex ═ 5nm, and Em ═ 5 nm. The maximum emission wavelength of the SOSG probe is 530nm, and the generation of singlet oxygen is quantified by the corresponding fluorescence intensity at the emission wavelength.

Accurately weighing a certain amount of sample PCPS by using an analytical balance to prepare 1 × 10^-3And (3) taking the aqueous solution of M as mother liquor, and storing the mother liquor in a refrigerator for later use. During the test, the mother liquor is taken out and naturally raised to the room temperature, 500 mu L of the mother liquor is taken in a 5mL volumetric flask by a pipette, water is added to the volumetric flask to reach the scale, and the volumetric flask is shaken up to obtain 100 mu M stock solution. The stock solution is diluted in a gradient way to be prepared into aqueous solutions to be detected with different concentrations. Taking 2mL of blank aqueous solution and 2mL of aqueous solution to be detected in a 24-well plate, and respectively using (660nm, 0.5 w/cm)²) The laser single hole is continuously irradiated for 2min, and simultaneously the temperature change is recorded by an infrared camera at 0, 0.5, 1, 1.5 and 2min respectively.

As a result: PCPS can remarkably inhibit the cell viability of DLD-1 and HCT116 of colorectal cancer tumors through a photothermal effect. See fig. 4, wherein a. pcps inhibits colorectal cancer HCT116 cell viability PTT and measurement of PDT performance; b, measuring the activity PTT and PDT performance of the PCPS for inhibiting the DLD-1 cell of the colorectal cancer; C. comparing the singlet oxygen generation capacities of PCPS with different concentrations after laser irradiation; D. temperature profile of PCPS of different concentrations during irradiation with near-infrared laser.

From the above experimental results it can be seen that: the PCPS can obviously inhibit the cell activity of colorectal cancer tumors DLD-1 and HCT116 through photothermal effect, and can obviously inhibit the growth of subcutaneous tumor-bearing tumors of a colorectal cancer cell line HCT116BALB/C nude mouse, and can be used for preparing antitumor drugs. The small molecular compound PCPS is developed as a new anti-tumor medicament or an auxiliary component thereof, has obvious tumor inhibition effect, and provides a new treatment way and means for treating and curing tumors.