阅读说明：本技术 Pcp及其在制备抗肿瘤药物中的应用 (PCP and application thereof in preparing antitumor drugs ) 是由 汤昆 张磊 张付利 常海波 王春丽 刘芳艳 邹娅欣 王子健 魏义渠 杜雅音 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-3H-吲哚]五碳菁溴化盐染料(简称PCP)在制备抗肿瘤药物中的应用。MTT结果显示：PCP能显著抑制结直肠癌细胞系HCT116和SW480细胞活力。可用于制备抗肿瘤药物。本发明的化合物PCP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-3H-indole ] pentacycyanine bromide dye (PCP for short) in preparation of antitumor drugs. MTT results show that: PCP can obviously inhibit the activity of HCT116 and SW480 cells in colorectal cancer cell lines. Can be used for preparing antitumor drugs. The compound PCP of the invention 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-3H-indole ] pentacyano cyanine bromide salt dye, characterized in that the dye is abbreviated as PCP; the chemical structure of the PCP is as follows:

2. the application of compound 1, 5-di [ N- (3, 5-di (2- (2-methoxyethoxy) ethoxy) benzyl-2, 3, 3-trimethyl-3H-indole ] pentacarbon cyanine bromide salt dye in preparing antitumor drugs.

3. The use of PCP in the preparation of an antineoplastic drug according to claim 2, wherein the PCP inhibits the viability of the HCT116 and SW480 colorectal cancer cell lines.

4. The use of PCP in the preparation of an anti-tumor medicament according to claim 3, wherein the concentration of PCP inhibiting cancer cells is 0.20-50 μ M.

5. The use of PCP in the preparation of an anti-neoplastic drug, as claimed in claim 2, wherein the PCP is capable of entering cells and localising to mitochondria and exerting an anti-neoplastic effect by acting on mitochondria.

6. The use of PCP in the preparation of an anti-neoplastic drug, as claimed in claim 2, wherein PCP exerts an anti-neoplastic effect by generating reactive oxygen species.

Technical Field

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

Background

Colorectal cancer is a common malignancy of the digestive system, with incidence and mortality increasing in recent years, now accounting for 3 and 2 of global cancer incidence and mortality, respectively. With the application of new diagnosis and treatment technologies and the continuous updating of chemotherapeutic drugs, the prognosis of colorectal cancer patients is greatly improved, but the overall survival rate of the patients is not remarkably improved. Until now, there are many approaches such as traditional Chinese medicine adjuvant therapy for colorectal cancer, but surgery and chemotherapy are the main ones. Surgical treatment is associated with a greater degree of trauma to the patient's body, and the stage of progression of the tumor determines the feasibility of the surgery. Current chemotherapeutic drugs also have varying degrees of side effects. Therefore, the development of new therapeutic drugs for colorectal cancer remains a primary task for many researchers.

The cyanine dye has the advantages of easy synthesis, good fluorescence effect, adjustable emission spectrum range, convenience for combination with biomolecules and the like, and is widely applied to living biological cell marking. The cyanine dye can be used for gene detection, protein detection, fluorescent probes and the like in the medical field. However, with the development of biotechnology, synthesized cyanine dyes cannot meet the application requirements. Therefore, research and development of novel cyanine dyes are of great significance in the biomedical field. The design and synthesis of a novel pentamethine cyanine dye PCP and the application of the novel pentamethine cyanine dye PCP in the preparation of 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 PCP in preparing an anti-tumor medicament.

In order to achieve the purpose, the invention adopts the following technical scheme: the application of a novel pentamethine cyanine dye PCP in preparing antitumor drugs, wherein the chemical structure of the PCP is shown as follows:

the relevant properties are as follows:

chemical name: 1, 5-di [ N- (3, 5-di (2- (2-methoxyethoxy) ethoxy) benzyl-2, 3, 3-trimethyl-3H-indole ] pentacyano cyanine bromide salt dye (PCP for short).

The molecular formula is as follows: c₆₇H₉₅N₂O₁₆(ii) a Molecular weight: 1184.48, respectively; the detection mode is as follows:¹HNMR、¹³c 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 action concentration of the PCP is 0.20-50 mu M.

The invention provides a method for inhibiting the activity of tumor cells in vitro, which comprises the steps of adding PCP into a culture solution of the tumor cells, wherein the final concentration of the added PCP is 0.20-50 mu M; the tumor cells were colorectal cancer cell lines HCT116 and SW 480.

The invention provides an anti-colorectal cancer drug, which can enter tumor cells and be positioned on mitochondria; the tumor cells were colorectal cancer cell lines HCT116 and SW 480.

The invention also provides an anti-colorectal cancer medicament, and the active component of the anti-colorectal cancer medicament is PCP.

The invention has the beneficial effects.

The invention provides application of PCP in preparing an anti-tumor medicament. MTT results show that: PCP can dose-dependently inhibit proliferation of HCT116 and SW480 cells of colorectal cancer. The plate clone test results show that: PCP significantly inhibited the growth of human colorectal cancer cell lines HCT116 and SW480 cell colonies and was concentration dependent. The subcellular localization results of PCP showed: the compound can enter tumor cells and localize to mitochondria. The active oxygen detection result shows that: the small molecule compound of the invention can cause the generation of active oxygen of cells. The small molecular compound PCP is developed as a new anti-tumor medicament or an auxiliary component thereof, has small action concentration and obvious tumor inhibition effect, and provides a new treatment way and means for treating and curing tumors.

Drawings

FIG. 1 structural characterization of PCP¹H NMR(a)、¹³C NMR (b) and ESI-MS (C) data. A. the¹H NMR(400MHz,DMSO-d6)spectrum of PCP；B¹³C NMR(100MHz,DMSO-d6)spectrum of PCP；C ESI-MS ofPCP。

Figure 2 effect of PCP on proliferation of colorectal cancer HCT116 cells. A is the result of the relative survival rate of cells after the stem cell is subjected to the prognosis of PCP stem cells with different concentrations; B-K is the cell morphology and number results after PCP intervention at concentrations of 0. mu.M, 0.20. mu.M, 0.39. mu.M, 0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M, 12.50. mu.M, 25. mu.M, 50. mu.M, respectively. P < 0.05; p < 0.01; p < 0.001.

FIG. 3 Effect of PCP on the proliferation of colorectal cancer SW480 cells. A is the result of the relative survival rate of cells after the stem cell is subjected to the prognosis of PCP stem cells with different concentrations; B-K is the cell morphology and number results after PCP intervention at concentrations of 0. mu.M, 0.20. mu.M, 0.39. mu.M, 0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M, 12.50. mu.M, 25. mu.M, 50. mu.M, respectively. P < 0.05; p < 0.01; p < 0.001.

FIG. 4 plate cloning assay of PCP inhibition of colorectal cancer HCT116 and SW480 cell proliferation. A is a plate clone test of PCP inhibiting the proliferation of HCT116 cells of colorectal cancer at the concentration of 0. mu.M, 0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M, 12.50. mu.M, respectively; b is a plate clone test of PCP inhibiting the proliferation of the colorectal cancer SW480 cells at the concentration of 0. mu.M, 0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M, 12.50. mu.M, respectively.

FIG. 5 subcellular localization of PCP in HCT116 and SW480 colorectal cancer cells. A is the subcellular localization of PCP in HCT116 colorectal cancer cells; b is the subcellular localization of PCP in SW480 colorectal cancer cells.

FIG. 6 measurement of active oxygen in HCT116 and SW480 colorectal cancer cells by PCP. A is the condition that PCP with the concentration of 0 μ M, 3.12 μ M, 6.25 μ M and 12.50 μ M respectively causes the generation of active oxygen of HCT116 cells; b is the condition that PCP with the concentration of 0. mu.M, 3.12. mu.M, 6.25. mu.M and 12.50. mu.M respectively causes the generation of active oxygen of SW480 cells.

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.

Experimental methods.

Application example 1.PCP Synthesis and Structure identification.

PCP was synthesized according to the following route.

A50 mL two-necked round bottom flask was charged with malondialdehyde bisbenzimide hydrochloride (130.7mg, 0.46mmol, 1.0eq), compound 3(526.7mg, 0.92mmol, 2.0eq), deoxygenated for 30min, deoxygenated glacial acetic acid 5mL and acetic anhydride 5mL were added, stirred for 10min, and reacted at 110 ℃ for 3h under argon. 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 300 meshes, mobile phase: methanol: dichloromethane: 1:20) to obtain a blue solid compound PCP: 186.0mg, yield: 33.5 percent.

¹H NMR(400MH_Z,DMSO-d6)8.39(t,J＝14.0Hz,2H),7.67(d,J＝7.6Hz,2H),7.35(m,4H),7.25(m,2H),6.51-6.38(m,9H),5.30(s,4H),4.01(m,8H),3.67(m,8H),3.52-3.46(m,24H),3.39-3.35(m,8H),3.20(s,12H),1.73(s,12H)；¹³C NMR(100MH_Z,DMSO-d6)173.44,160.05,154.86,142.17,140.96,137.41,128.54,126.17,124.97,122.59,111.34,105.34,103.88,99.87,71.27,69.91,69.77,69.59,68.79,67.25,58.03,49.08,46.50,27.27；MS(ESI):calcd for[M]⁺1184.48, found 1183.73. Structural characterization of PCP¹H NMR(A)、¹³The C NMR (B) and ESI-MS (C) spectra are shown in FIG. 1, A¹H NMR(400MHz,DMSO-d6)spectrum of PCP；B¹³C NMR(100MHz,DMSO-d6)spectrum of PCP；C ESI-MS of PCP。

Application example 2.MTT assay to determine the inhibitory effect of PCP on the viability of the colorectal cancer cell lines HCT116 and SW480 cells.

HCT116 and SW480 cells were as described in 3 × 10³Each well was inoculated into a 96-well plate, cultured in RPMI 1640 complete medium containing 5% CO2, 100U/mL penicillin and 100. mu.g/mL streptomycin at 37 ℃ for 24 hours, PCP was added at different concentrations (0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M and 12.50. mu.M, respectively), 5 wells were set for each concentration, and after 48 hours of drug action, the culture solution was discarded and the cell viability was determined using 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 PCP intervention hole/control hole as the cell activity.

IC₅₀Refers to the concentration of inhibitor at which cell growth is inhibited by half. Here, the concentration of PCP was half the number of the cells of the colorectal cancer cell lines HCT116 and SW480, respectively, as the control group.

As a result: IC of PCP on colorectal cancer HCT116 and SW480 cells₅₀The value was 6.25. mu.M. FIG. 2: measurement of PCP inhibition of colorectal cancer HCT116 cell viability; FIG. 3: measurement of SW480 cell viability of PCP-inhibited colorectal cancer. Wherein A is the result of the relative survival rate of cells after the stem cell is subjected to the prognosis of the PCP stem cell with different concentrations; B-K is the cell morphology and number results after PCP intervention at concentrations of 0. mu.M, 0.20. mu.M, 0.39. mu.M, 0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M, 12.50. mu.M, 25. mu.M, 50. mu.M, respectively. A, P<0.05；**,P<0.01；***,P<0.001。

Application example 3. inhibition of the proliferation of the colorectal cancer cell lines HCT116 and SW480 by PCP was verified using a plate cloning assay.

HCT116 and SW480 cells were inoculated into 6-well plates at 500/well, cultured in RPMI 1640 complete medium containing 5% CO2, 100U/mL penicillin and 100. mu.g/mL streptomycin at 37 ℃ for 24h, PCP was added at different concentrations (0. mu.M, 0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M, 12.50. mu.M, respectively), the medium containing PCP was discarded after 48h of drug action, the cell colonies were stained with 1% crystal violet staining solution after culture in medium without PCP for 14d, and the staining solution was washed off by double distilled water and then dried.

As a result: after the PCP acts for 48 hours, the clone growth of HCT116 and SW480 cells can be obviously inhibited, and the size and the number of cell colonies generated by single cells are inversely related to the concentration of the PCP. See FIG. 4: wherein A: plate cloning assay of PCP inhibition of colorectal cancer HCT116 cell proliferation. Plate cloning assay of PCP inhibition of colorectal cancer SW480 cell proliferation. The interference of PCP concentrations of 0. mu.M, 0.78. mu.M, 1.56. mu.M, 3.12. mu.M, 6.25. mu.M, and 12.50. mu.M on cell proliferation after 2d culture of HCT116 and SW480 cells, respectively.

Application example 4 subcellular localization of PCP in HCT116 and SW480 colorectal cancer cells.

HCT116 and SW480 cells at 0.7 x 10⁵The cells were plated on a 20mL dish, cultured in RPMI 1640 complete medium containing 5% CO2, 100U/mL penicillin and 100. mu.g/mL streptomycin at 37 ℃ for 24h, added with 20. mu.M PCP, and after 2h drug action, the supernatant was aspirated and discarded, Mito-Tracker Green (mitochondrial Green fluorescent Probe) was used for specific fluorescent staining of mitochondria, DAPI staining of cell nuclei, and PCP entry and sub-localization in cells were observed under a confocal laser scanning microscope.

As a result: see FIG. 5: after 2h of action of 20. mu.M PCP, it entered HCT116 and SW480 cells and localized to mitochondria. Wherein a is the subcellular localization of PCP in HCT116 colorectal cancer cells; b is the subcellular localization of PCP in SW480 colorectal cancer cells. Blue light for nuclear DAPI staining, Green light for mitochondrial Mito-Tracker Green staining, red light for PCP autofluorescence, Bright Fielda for white light field.

Application example 5 measurement of active oxygen in HCT116 and SW480 colorectal cancer cells with PCP.

HCT116 and SW480 cells at 0.6 x 10⁵Per well, inoculated to 6-well plate, using RPMI 1640 complete medium containing 5% CO2, 100U/mL penicillin and 100. mu.g/mL streptomycin, cultured for 24h at 37 ℃, added with PCP of different concentrations (0. mu.M, 3.12. mu.M, 6.25. mu.M, 12.50. mu.M, respectively), after 48h of drug action, the supernatant was aspirated and discarded, 1mL of DCFH-DA active oxygen fluorescent probe diluted 1000-fold in medium was added to each well, washed three times with serum-free medium after 20min in 37 ℃, and the active oxygen production level was directly observed using a fluorescence microscope.

As a result, PCP causes the production of active oxygen in HCT116 and SW480 colorectal cancer cells, and the amount of active oxygen is in positive correlation with the concentration of PCP. See FIG. 6: a: PCP causes the production of reactive oxygen species in HCT116 cells; b: PCP causes the production of reactive oxygen species in SW480 cells. When the concentration of PCP was 0. mu.M, 3.12. mu.M, 6.25. mu.M, or 12.50. mu.M, respectively, the generation of active oxygen was concentration-dependent. Bright Field is the corresponding white Field of view.