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1.
目的 文献报道氟尿嘧啶(5-Fu)与光敏剂联用具有协同抗肿瘤作用,笔者设计合成二氢卟吩e6(化合物3)与5-Fu经酰腙键偶联的pH响应性、光化疗双模抗肿瘤光敏剂(化合物1),研究其初步体外光动力抗癌活性及作用机制。方法 首先,5-Fu与五硫化二磷于吡啶中回流反应形成4-硫代-5-氟尿嘧啶,再和水合肼于甲醇中反应制得5-氟尿嘧啶-4-腙(化合物2);然后,将脱镁叶绿素a(化合物4)酸碱降解产物3经EDC·HCl催化缩合形成二氢卟吩e6-131,152-酸酐中间体后,直接与2发生选择性酰化反应,制得目标化合物1,并考察其体外pH响应性5-Fu释放及对黑素瘤B16-F10和肝癌HepG2细胞的光动力抗癌活性和作用机制。结果 化合物1在微酸(pH 5.0)环境中能有效释放5-Fu,24 h累积释放率可达60.3%;其在光照下对黑素瘤B16-F10和肝癌HepG2细胞的半数抑制浓度(IC50)分别为0.73 μmol/L和0.90 μmol/L,均显著优于先导物3和上市药物他拉泊芬(talaporfin),且能显著提升肿瘤细胞内活性氧(ROS)水平和诱导肿瘤细胞凋亡,并阻滞肿瘤细胞周期于S期。其结构经紫外、电喷雾质谱、氢谱和元素分析确证。结论 新型双模抗肿瘤光敏剂化合物1具有光动力抗癌活性强、治疗指数(暗毒/光毒比)高,且可在微酸(pH 5.0)环境响应性释放5-Fu等优点,从而实现“单分子”光化疗双重抗肿瘤作用,值得进一步开发研究。  相似文献   

2.
目的 设计合成比紫红素-18(2)化学性质更稳定的二氢卟吩p6-13,15-环酰亚胺类光敏剂(1)。方法 以蚕沙叶绿素a粗提物(糊状叶绿素)酸水解产物脱镁叶绿酸a(3)的五元β-酮基羧酸酯环经碱性条件下空气氧化降解制得的紫红素-18(2)为原料,用各种胺包括羧基保护的氨基酸与其酸酐环发生缩合反应制得目标化合物。结果 以32.6%~65.2%的收率成功合成了目标化合物1a~1j,其结构经电喷雾质谱(ESI-MS)、氢谱(1H NMR)、紫外谱(UV)和元素分析确证。结论 紫红素-18(2)和胺反应可以制得目标化合物1。该合成路线具有原料廉价易得、反应条件温和、操作简便等优点。  相似文献   

3.
冯国 《中国药师》2013,(6):835-837
摘 要 目的:建立HPLC法测定复方吡拉西坦脑蛋白水解物片中维生素B1、维生素B2和维生素B6含量的方法。方法: 采用Insteril ODS-3色谱柱(250 mm×4.6 mm,5 μm),流动相:0.01 mol·L-1庚烷磺酸钠(含0.25%三乙胺,用冰醋酸调节pH至3.8)-甲醇(75∶25),柱温30℃,检测波长为280 nm,流速:1.0 ml·min-1结果: 维生素B1、维生素B2、维生素B6分别在3.98~99.40 μg·ml-1(r=0.999 7)、4.08~101.91μg·ml-1(r=0.999 9)、2.08~52.00 μg·ml-1(r=0.999 9)范围内线性关系良好,平均回收率分别为99.18%、99.53%、99.27%,RSD分别为0.60%、0.67%、0.71%(n=9)。结论:本法简便、快速、准确,可用于复方吡拉西坦脑蛋白水解物片中维生素B1、维生素B2和维生素B6的含量测定  相似文献   

4.
目的 建立CO2超临界流体色谱法测定莪术油中呋喃二烯、牻牛儿酮和莪术二酮含量的方法。方法 采用ACQUITY UPC2 HSS C18 SB色谱柱(3.0 mm×150 mm,1.8 μm),以CO2-乙腈为流动相,梯度洗脱;流速为1.0 mL·min-1;检测波长为216 nm,柱温为55℃,背压为2 000 psi。结果 呋喃二烯在2.67~1 337.26μg·mL-1内线性关系良好(r=1.000),加样回收率为97.94%(n=6,RSD=1.50%)。牻牛儿酮在2.77~1 386.00 μg·mL-1内线性关系良好(r=1.000),加样回收率为96.07%(n=6,RSD=1.68%);莪术二酮在6.99~3 493.00 μg·mL-1内线性关系良好(r=1.000),加样回收率为99.33%(n=6,RSD=1.88%)。结论 本方法快捷准确、稳定且绿色环保,可用于莪术油中上述3个倍半萜类成分的质量控制。  相似文献   

5.
目的 利用近红外光谱分析技术建立注射用益气复脉(冻干)主要原料红参醇提过程中3种单体皂苷——人参皂苷Rg1、Re和Rb1的定量模型,实现提取过程中关键指标的快速检测。方法 在线采集红参醇提过程的近红外光谱,以超高效液相色谱(UPLC)法测定提取过程药液中人参皂苷Rg1、Re和Rb1的量为参考值,采用偏最小二乘法建立光谱与测定值之间的定量校正模型,进而对提取过程进行在线分析。结果 人参皂苷Rg1和Re的建模波段均为9 403.7~7 498.3 cm-1和6 102~5 446.3 cm-1组合波段;人参皂苷Rb1的建模波段为5 774.1~5 446.3 cm-1。人参皂苷Rg1、Re、Rb1定量模型的交叉验证决定系数(R2)分别为99.40、99.44、99.41,交叉验证均方根误差分别为5.18、2.77、11.00。结论 所建立的3种单体皂苷定量模型预测性能良好,能够有效测定红参醇提过程中人参皂苷Rg1、Re和Rb1的量。  相似文献   

6.
目的 建立斑蝥酸钠维生素B6注射液中斑蝥酸钠和维生素B6含量的同时测定方法。方法 采用HPLC,色谱柱为Syncronis C18(250 mm×4.6 mm,5 μm),流动相为0.02 mol·L-1磷酸二氢钾溶液(磷酸调pH值至2.6)-乙腈,梯度洗脱,流速为1.0 mL·min-1,检测波长为193,290 nm,波长切换法,柱温:30℃。结果 斑蝥酸钠回归方程为Y=1.926X+0.010(r=0.999 7),在0.064 6~0.322 8 mg·mL-1内斑蝥酸钠与峰面积的线性关系良好,平均回收率为98.9%,RSD为1.2%(n=9)。维生素B6回归方程为Y=24.153X+0.670(r=0.999 9),在0.535 9~2.679 7 mg·mL-1内维生素B6与峰面积的线性关系良好,平均回收率为100.2%,RSD为1.0%(n=9);仪器精密度、稳定性和重复性试验的RSD均<2.0%。结论 所建立的方法结果准确、重复性好,可用于斑蝥酸钠维生素B6注射液的质量控制。  相似文献   

7.
孙小玲 《中国药师》2013,16(3):349-351
摘 要 目的:建立HPLC梯度法同时测定复方三七维康胶囊中三七皂苷R1、人参皂苷Rb1、Rg13种皂苷的含量。方法: 色谱柱:大连Spherisorb C18分析柱(200 mm×4.6 mm,5 μm);流动相:乙腈-水,梯度洗脱;流速:1.0 ml·min-1;检测波长 203 nm。结果:三七皂苷R1、人参皂苷Rg1和Rb1分别在1.06~18.55 μg(r=0.997 3)、2.02~35.35 μg(r=0.998 2)和2.02~35.35 μg(r=0.998 2)之间线性关系良好。平均回收率三七皂苷R1为100.8%(RSD=1.53%,n=5),人参皂苷 Rg1为98.9%(RSD=1.87%,n=5),人参皂苷Rb1为99.7%(RSD=1.90%,n=5)。结论:HPLC梯度洗脱法能够将多种皂苷很好地分离检测,该方法准确可靠,重复性好,可用于控制其质量。  相似文献   

8.
目的 从民族药山胡椒内生真菌Trichoderma sp.SHJN1和Perenniporia sp.SHJG1的代谢物中寻找活性先导化合物。方法 采用正相硅胶、反相硅胶、Sephadex LH-20凝胶及制备型HPLC等对Trichoderma sp.SHJN1和Perenniporia sp.SHJG1发酵物进行分离纯化,再通过NMR、ESI-MS等鉴定化合物结构,同时采用人乳腺癌细胞(MCF-7)和人肺癌细胞(A549)对这些化合物的抗肿瘤活性进行初步评价。结果 从2株内生真菌次级代谢产物中共分离鉴定了12个化合物:alantrypinone (1)、oryzalactam (2)、phomoindene A (3)、cis-gregatin B (4)、huaspenone B (5)、stigmasta-7,22-dien-3β,5α,6α-triol (6)、ergosterol (7)、1-deoxy-2-demethylviridiol (8)、viridiol (9)、trichodermamides A (10)、chromone (11)、对-羟基苯乙酸(12)。抗肿瘤活性评价结果显示,化合物3 抑制MCF-7细胞增殖活性IC50为(62.9±1.02)μmol·L-1[顺铂(cisplatin,DDP) IC50为(30.1±1.67)μmol·L-1];化合物89 抑制A549细胞增殖活性的IC50分别为(34.6±1.57)μmol·L-1和(44.9±1.74)μmol·L-1[DDP IC50为(20.6±1.42)μmol·L-1]。结论 化合物389 具有潜在抗肿瘤活性。  相似文献   

9.
目的 建立HPLC测定绞股蓝中七叶胆苷XLVI和人参皂苷Rb3含量的方法。方法 采用Ultimate XB-C18色谱柱(250 mm×4.6 mm,5 μm),以乙腈(A)-水(B)线性梯度洗脱,检测波长203 nm,流速1 mL·min-1,柱温30℃。结果 七叶胆苷XLVI在3.30~39.62 μg·mL-1范围内线性良好(r2=0.999 7),平均回收率为113%,RSD为1.84%;人参皂苷Rb3在3.27~39.26 μg·mL-1范围内线性良好(r2=0.999 7),平均回收率为102%,RSD为2.82%。结论 该方法有较好的分离效果,准确性、精密度和重复性良好,为绞股蓝的研究和质量控制提供了科学依据。  相似文献   

10.
目的 建立高效液相色谱(HPLC)法同时测定复方三维右旋泛酸钙糖浆中维生素B1、维生素B2、维生素B6和烟酰胺的含量。方法 采用外标法进行测定,色谱柱为Thermo Betasil C18 Analytical(4.6 mm×250 mm, 5 μm),流动相为乙腈-5 mmol·L-1十二烷基硫酸钠(含0.05%甲酸)水溶液梯度洗脱,流速1.0 mL·min-1,检测波长260 nm,柱温30 ℃。分别测定10批复方三维右旋泛酸钙糖浆。结果 维生素B1、维生素B2、维生素B6、烟酰胺4种成分的线性范围分别为5.76~115.2 μg·mL-1(r=0.999 9)、1.16~23.20 μg·mL-1(r=0.999 9)、1.72~34.4 μg·mL-1(r=0.999 6)和5.76~115.2 μg·mL-1(r=0.999 9),平均加样回收率为96.2%~98.4%(RSD为2.14%~3.42%)。不同批次复方三维右旋泛酸钙糖浆中维生素B1、维生素B2、维生素B6、烟酰胺含量范围分别为0.133 7~0.155 9、0.027 86~0.030 71、0.039 05~0.047 7、0.138 7~0.148 2 mg·g-1结论 该方法为完善复方三维右旋泛酸钙糖浆的质量标准和加强质量控制提供了新的方法和依据。  相似文献   

11.
二氢卟吩F甲醚的合成及其光敏化力和肿瘤光生物活性   总被引:3,自引:0,他引:3  
光动力疗法(photodynamictherapy,PDT)始于70年代,现已发展成为新的肿瘤法定疗法。其治疗基础为:当一定波长的光辐照浓集光敏剂的肿瘤组织时,由敏化剂诱发光动力效应,导致肿瘤组织坏死而达到治疗目的[1]。目前,国内外临床应用的光敏剂如血卟啉衍生物(hematoporphyrinderivative,HpD)、光敏素II(photofrinII)和癌光啉(PSD007)等均为组成不定的复杂卟啉混合物,它们在红光区(λ>600nm)的吸收系数小而导致光动力反应深度不能满足浸润较深…  相似文献   

12.
目的 合成13-酰胺基取代苦参碱衍生物及研究该类化合物的体外抗肿瘤活性。方法 以槐果碱为原料,通过迈克尔加成(Michael addition),叠氮还原酰化反应,制得系列13-位酰胺取代的衍生物,所有化合物结构均经1H NMR等谱确证;选取人肝癌细胞(BEL-7404)和小鼠黑色素瘤细胞(K111)对所合成的目标化合物进行体外抗肿瘤药理活性筛选。结果 设计合成了9个新化合物,大多数化合物对两株肿瘤细胞都具有较强的抑制活性。结论 化合物4b4e对人肝癌细胞(BEL-7404)有较强的抑制活性。  相似文献   

13.
目的设计并合成了1,2,3-三氮唑类苦参碱衍生物,并对其进行体外抗肿瘤活性研究。方法以苦参碱为起始原料,通过水解反应、N-烷基化反应、click反应等反应得到目标化合物。采用噻唑蓝(MTT)法考察所合成目标化合物对HeLa、MCF-7和HepG23种肿瘤细胞的体外抗增殖活性。结果合成了9个1,2,3-三氮唑类苦参碱衍生物,其结构经~1H-NMR,~(13)C-NMR及HR-MS确定,抗肿瘤活性测试结果表明该类化合物具有一定的抗肿瘤活性,其中化合物5h对MCF-7肿瘤细胞表现出良好的活性,且活性优于母体化合物苦参碱。结论部分目标化合物具有较好的抗肿瘤活性,为该类抗肿瘤化合物的进一步优化提供思路。  相似文献   

14.
目的设计并合成积雪草酸C2、C3、C23、C28衍生物,并对其体外抗肿瘤活性进行研究。方法以天然产物积雪草酸为先导化合物,对C2、C3、C23位羟基及C28位羧基进行结构改造,并采用SRB法对目标化合物进行初步的体外抗肿瘤活性研究。结果设计并合成了目标化合物,利用MS及1H-NMR确证了结构;体外实验中,积雪草酸衍生物的抗肿瘤活性明显高于积雪草酸,并优于对照药吉非替尼。结论积雪草酸衍生物具有良好的抗肿瘤活性,值得进一步研究。  相似文献   

15.
目的设计并合成甘草次酸C3、C30衍生物,并对其体外抗肿瘤活性进行研究。方法以甘草次酸为先导化合物,对其C3位羟基、C30位羧基进行结构修饰,并采用SRB法对目标化合物进行体外抗肿瘤活性研究。结果设计合成了12个新型甘草次酸衍生物,并利用MS、1H-NMR及元素分析确证了结构;体外实验中,目标化合物对MCF-7和A549肿瘤细胞的抑制活性均明显强于甘草次酸,其中化合物GA-I1、GA-I2和GA-II1对MCF-7和A549两种细胞表现出很好的抑制活性,明显高于对照药吉非替尼。结论甘草次酸衍生物具有良好的抗肿瘤活性,值得进一步研究。  相似文献   

16.
Purpose. To examine the structure–activity relationships for the inhibition of the activity of recombinant human CYP3A4 and to establish a generalized, quantitative physicochemical model for use in early drug discovery. Methods. Inhibition of the activity of recombinant human CYP3A4 (erythromycin N–demethylase) by 30 diverse chemicals was studied using enhanced throughput methodology. Results. There was a general, strong correlation between the IC50 value determined against erythromycin N–demethylase activity and lipophilicity (LogD7.4) (r 2 = 0.68, p <0.0001). This relationship was strengthened further by subdividing the structures studied into two distinct subpopulations of chemistry within the dataset. These could be identified by the absence (r 2 = 0.80, p <0.0001) or presence (r 2 = 0.69, p <0.0001) of a sterically uninhindered N–containing heterocycle, more specifically a pyridine, imidazole, or triazole function. The presence of these structural motifs increased the potency of CYP3A4 inhibition by approximately 10–fold for a given lipophilicity (LogD7.4.value). More detailed analyses of AstraZeneca compounds demonstrated that the inhibitory potency of the pyridine structure can be attenuated through direct steric effects or electronic substitution resulting in a modulation of the pKa of the pyridine nitrogen, thereby influencing its ability to interact with the CYP heme. Conclusions. A generalized, quantitative model is proposed for the inhibition of the major drug metabolizing enzyme, CYP3A4. This model indicates the importance of lipophilicity and rationalizes increased potency arising through additional interactions with the heme iron. These general relationships were shown to be applicable to a selection of compounds of interest to several early research projects.  相似文献   

17.
含有替加氟的卵磷脂类似物设计、合成及抗癌活性   总被引:9,自引:1,他引:8  
许新华  陈茹玉 《药学学报》2002,37(11):858-862
目的合成含有替加氟的以卵磷脂类似物作载体的缀合物,并测定其生物活性。方法将替加氟转化为羟烷基衍生物,六乙基亚磷酰三胺作磷酰化试剂,与羟烷基替加氟、1-十六烷基甘油及硫作用,经一锅法合成得到环甘油硫代磷脂羟烷基替加氟缀合物,通过三乙胺对环甘油硫代磷脂替加氟缀合物开环得到标题产物。结果得到新化合物9个(2a~c,3a~c,4a~c),其结构经IR,NMR和元素分析确证。结论体外活性测定表明,化合物4a对人体膀胱癌细胞的抑制效果比替加氟好。  相似文献   

18.
Nanoparticles have been explored recently as an efficient means of delivering photosensitizers for cancer diagnosis and photodynamic therapy (PDT). Silicon phthalocyanine 4 (Pc4) is currently being clinically tested as a photosensitizer for PDT. Unfortunately, Pc4 aggregates in aqueous solutions, which dramatically reduces its PDT efficacy and therefore limits its clinical application. We have encapsulated Pc4 using silica nanoparticles (Pc4SNP), which not only improved the aqueous solubility, stability, and delivery of the photodynamic drug but also increased its photodynamic efficacy compared to free Pc4 molecules. Pc4SNP generated photo-induced singlet oxygen more efficiently than free Pc4 as measured by chemical probe and EPR trapping techniques. Transmission electron microscopy and dynamic light scattering measurements showed that the size of the particles is in the range of 25–30 nm. Cell viability measurements demonstrated that Pc4SNP was more phototoxic to A375 or B16-F10 melanoma cells than free Pc4. Pc4SNP photodamaged melanoma cells primarily through apoptosis. Irradiation of A375 cells in the presence of Pc4SNP resulted in a significant increase in intracellular protein-derived peroxides, suggesting a Type II (singlet oxygen) mechanism for phototoxicity. More Pc4SNP than free Pc4 was localized in the mitochondria and lysosomes. Our results show that these stable, monodispersed silica nanoparticles may be an effective new formulation for Pc4 in its preclinical and clinical studies. We expect that modifying the surface of silicon nanoparticles encapsulating the photosensitizers with antibodies specific to melanoma cells will lead to even better early diagnosis and targeted treatment of melanoma in the future.  相似文献   

19.
This work describes the synthesis and characterization of three novel complexes derived from N-benzyl-ethylenediamine and oxalate. Precursor compounds were synthesized by reacting N-benzyl-ethylenediamine with K2PtCl4. Subsequent substitution of chlorides by oxalate led to the final products. Elemental analysis and the infrared, 1H, 13C, and 195Pt NMR spectra of these complexes were provided. The cytotoxic activities were investigated against human non-small cell lung carcinoma (A549), mouse non-metastatic cell skin melanoma (B16-F1), mouse metastatic cell skin melanoma (B16-F10), human cell breast adenocarcinoma (MDA-MB-231) and normal cell lines such as baby hamster cell kidney (BHK-21), hamster cell ovary (CHO) and compared to cisplatin and carboplatin under the same experimental conditions. The presence of oxalate as a leaving group conferred an interesting cytotoxicity profile to the complexes in the tested cell lines.  相似文献   

20.
Triarylmethane and thiazine dyes have attracted attention as anticancer and antimicrobial agents, due to their structural features and selective localizations. Although these dyes have been initially explored in the context of photodynamic therapy, some of these such as New Fuchsin and Azure B have still not been extensively investigated. For this reason, we evaluated the chemical stability, aggregation effect, and lipophilicity, as well as the photodynamic activity against LM‐2 murine mammary carcinoma cells of five new brominated dyes of triarylmethane and thiazine. These cationic compounds were obtained at high purities and unequivocally characterized by conventional techniques. The introduction of bromine atoms into the chromophoric system of New Fuchsin and Azure B dyes gave rise to a moderate bathochromic shift and increased the lipophilicity, thereby improving their photophysical and photochemical properties for biomedical applications. Moreover, the in vitro photodynamic activity demonstrated that, as the degree of bromination increased, the phototoxicity remained unchanged or decreased. The lower efficiency to inactivate cultured tumor cells may be attributed to the formation of the colorless carbinol pseudobase and aggregation effects for triarylmethane and thiazine dyes, respectively. A promising strategy to reverse the biological activity decrease observed might be the design of third‐generation photosensitizers.  相似文献   

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