Four new ruthenium(II) polypyridyl complexes [Ru(N-N)(2)(dhbn)](ClO4)(2) (N-N = dmb: 4,4'-dimethyl-2,2'-bipyridine 1; bpy = 2,2'-bipyridine 2; phen = 1,10-phenanthroline 3; dmp = 2,9-dimethyl-1,10-phenanthroline 4) were synthesized and characterized. The cytotoxicity in vitro of the ligand and complexes toward HepG-2, HeLa, MG-63 and A549 were assayed by MIT method. The IC50 values of the complexes against the above cells range from 17.7 +/- 1.1 to 45.1 +/- 2.8 mu M. The cytotoxic activity of the complexes against HepG-2 cells follows the order of 4 > 2 > 3 > 1. Ligand shows no cytotoxic activity against the selected cell lines. Cellular uptake, apoptosis, comet assay, reactive oxygen species, mitochondrial membrane potential, cell cycle arrest, and the expression of proteins involved in apoptosis pathway induced by the complexes were investigated. The results indicate that complexes 1-4 induce apoptosis in HepG-2 cells through an intrinsic ROS-mediated mitochondrial dysfunction pathway. (C) 2016 Elsevier Masson SAS. All rights reserved.

Four new ruthenium(II) polypyridyl complexes [Ru(dmb)2(dqtbt)](ClO4)2 (1) (dqtbt=12-(2,3-diphenyl-quinoxalin-6-yl)-4,5,10,13-tetraazabenzo[b]triphenylene, dmb=4,4′-dimethyl-2,2′-bipyridine), [Ru(bpy)2(dqtbt)](ClO4)2 (2) (bpy=2,2′-bipyridine), [Ru(phen)2(dqtbt)](ClO4)2 (3) (phen=1,10-phenanthroline) and [Ru(dmp)2(dqtbt)](ClO4)2 (4) (dmp=2,9-dimethyl-1,10-phenanthroline) were synthesized and characterized. The cytotoxicity in vitro of the complexes was evaluated against human BEL-7402, A549, HeLa, HepG-2 and MG-63 cancer cell lines. These complexes are sensitive to BEL-7402 cells, the IC50 values are 4.9±0.5, 4.6±0.4, 7.7±1.8 and 1.9±0.3μM toward BEL-7402 cells. The complexes can increase the levels of reactive oxygen species and induce the decrease of mitochondrial membrane potential. Morphological and comet assay studies show that the complexes can effectively induce apoptosis in BEL-7402 cells. Complexes 1–4 inhibit the cell growth at G0/G1 phase in BEL-7402 cell line. The complexes can downregulate the expression of Bcl-2 and Bcl-x proteins and upregulate the levels of Bid protein in BEL-7402 cells. The results show that the complexes induce BEL-7402 cell apoptosis through a ROS-mediated mitochondrial dysfunction pathway. In addition, the complexes show strong protein-binding affinities.

In this article, the in vitro cytotoxicity of platycodin D was evaluated in human PC-12, SGC-7901, BEL-7402, HeLa and A549 cancer cell lines. PC-12 cells were sensitive to platycodin D treatment, with an IC50 value of 13.5±1.2μM. Morphological and comet assays showed that platycodin D effectively induced apoptosis in PC-12 cells. Platycodin D increased the levels of reactive oxygen species (ROS) and induced a decrease in mitochondrial membrane potential. Platycodin D induced cell cycle arrest at the G0/G1 phase in the PC-12 cell line. Platycodin D can induce autophagy. In addition, platycodin D can down-regulate the expression of Bcl-2 and Bcl-x, and up-regulate the levels of Bid protein in the PC-12 cells. The results demonstrated that platycodin D induced PC-12 cell apoptosis through a ROS-mediated mitochondrial dysfunction pathway.

目的 探讨2-(1H-苯并咪唑-2-基)-3-苯丙烯腈类化合物的质谱裂解规律.方法 分别在正离子和负离子检测模式下,解析2-(1H-苯并咪唑-2-基)-3-苯丙烯腈类化合物的主要特征碎片离子以及可能的裂解途径.结果 在正离子模式下,1～16号化合物二级质谱主要有[M+H-HR2]+、[M+H-NH]+和[M+H HCN]+3个特征离子峰.其中1～ 10号化合物[M+H HR2]+特征离子进一步三级质谱可裂解为碎片离子峰218、217、77;12～ 16号化合物[M+H-HR2]+特征离子进一步三级质谱可裂解为碎片离子峰244[M+H-HR2-HR1]+.17～18号化合物在正离子模式下,二级质谱主要有[M+H-HR2]+、[M+H-HR3]+2个特征离子峰;[M+H-HR3]+特征离子峰进一步三级质谱可裂解为碎片离子峰[M+H-HR3-HR2]+、[M+H-HR3-NH]+、[M+H-HR3-HCN]+.在负离子模式下,1～ 18号化合物二级质谱主要有[M-H-HCN]I个特征离子峰,1～11号化合物进一步三级质谱可裂解为碎片离子峰216.结论 2-(1H-苯并咪唑-2-基)-3-苯丙烯腈类化合物二级质谱主要有3条裂解途径,当苯并咪唑环上氮或苯环上有取代时都将发生裂解,氮上有取代的化合物裂解易于苯环上有取代的化合物.

研究了研磨液中氨三乙酸、柠檬酸和磷酸盐的离子色谱-抑制电导测定方法.采用IonPac AS11(4mm×250 mm)分析柱以及相应的保护柱IonPacAG11 (4 mm×50 mm),以20 mmol/L NaOH:H2O梯度洗脱,流速1.00 mL/min,进样量25uL.氨三乙酸、柠檬酸和磷酸盐质量浓度与其峰面积具有良好的线性和重复性,相关系数均不低于0.999,其检出限分别为0.02,0.02和0.05 mg/L.方法适用于研磨液中氨三乙酸、柠檬酸和磷酸盐含量的测定.

A Ru(II) polypyridyl complex [Ru(bpy)2(HMSPIP)](ClO4)2 (1) (bpy=2,2'-bipyridine, HMSPIP=2-(4-methylsulfonyl)phenyl-1H-imidazo[4,5-f][1,10] phenanthroline) was synthesized. The IC50 value of the complex against human hepatocellular cell BEL-7402 is 21.6±2.7 μM. The complex shows no cytotoxic activity toward human lung adenocarcinoma cell A549, human osteosarcoma cell MG-63 and human breast cancer cell SK-BR-3 cells. It is easily for complex 1 to be taken up by BEL-7402 cells. The complex can enhance the reactive oxygen species (ROS) levels and induce the decrease in the mitochondrial membrane potential. The complex inhibits the cell growth in BEL-7402 cells at G2/M phase. Complex 1 can regulate the expression of Bcl-2 family proteins. The results show that the complex induces apoptosis of BEL-7402 cells through a ROS-mediated mitochondrial dysfunction pathway.

A new ruthenium(II) polypyridyl complex [Ru(dmp)2(pddppn)](ClO4)2 Ru1 was synthesized and characterized. The cytotoxic activity in vitro of the complex was evaluated by MTT method. Ru1 shows high effect on the inhibition of the cell growth against BEL-7402, HeLa, MG-63 and A549 cells with low IC50 values of 1.6 ± 0.4, 9.0 ± 0.8, 1.5 ± 0.2 and 1.5 ± 0.3 μM, respectively. The cellular uptake indicates that Ru1 can enter into the cytoplasm and accumulate in the cell nuclei. Ru1 can induce apoptosis in A549 cells and enhance the levels of reactive oxygen species (ROS) and induce the decrease of mitochondrial membrane potential. In addition, Ru1 can down-regulate the levels of Bcl-2, Bcl-x, Bak, and Bim expression and up-regulate the expression of Bag-1 and Bad. The complex induces apoptosis of A549 cells through an intrinsic ROS-mediated mitochondrial dysfunction pathway, which was accompanied by regulating the expression of caspases and Bcl-2 family proteins.

One novel nine-membered macrocyclic polysulfur cembranoid lactone, sinulariaoid A (1); three new multioxygenated cembranoids, sinulariaoid B (2), sinulariaoid C (3), sinulariaoid D (4); and four known cembranoids, capilloloid (5), dihydrosinularin (6), sinularin (7), and dihydrosinuflexolide (8) were isolated from the soft coral Sinularia sp. collected off of Sanya Bay in the South China Sea. Their stereochemical structures were determined on the basis of extensive spectroscopic methods, including single crystal X-ray diffraction analysis. Sinulariaoid A (1) is the first reported nine-membered macrocyclic polysulfur cembranoid from soft coral. The cytotoxic activities of compounds 1–8 were determined in four human cancer cell lines (HepG2, HepG2/ADM, MCF-7, and MCF-7/ADM). Of these, sinulariaoid A (1) exhibited the most potent anticancer activity in vitro, and its cytotoxicity in HepG2/ADM was more potent than in the other three cell lines. Furthermore, it was found that sinulariaoid A (1) induced apoptosis, and its selective toxicity toward HepG2/ADM cells was not related to P-glycoproteins.

Nuclear magnetic resonance (NMR) was employed to characterize the hydrogen-deuterium exchange for the proton pump inhibitors pantoprazole sodium, esomeprazole sodium, rabeprazole sodium, lansoprazole, and ilaprazole in methanol-d4. The results showed that the 1H and 13C signals of 8-CH2 (labeled as H8a, H8b, and C8) next to the sulfinyl (S˭O) group of the proton pump inhibitors decreased significantly. Electrospray ionization mass spectrometry showed the presence of deuterated products. Basing on the NMR data, H8a and H8b of proton pump inhibitors were more active for the hydrogen-deuterium exchange. The most significant parameter governing the exchange was the salt-formation of the benzimidazole group. Therefore, the influence of salt-formation on hydrogen-deuterium exchange was characterized for ilaprazole; replacement of NH by N–Na on the benzimidazole group accelerated the exchange process. Tandem mass spectrometry showed that CH˭S–OH was formed by tautomerism involving sulfinyl and CH2 groups in methanol-d4.

Four Ru(ii) complexes [Ru(N–N)2(DHBT)](ClO4)2 were synthesized and characterized. The cytotoxicity in vitro, apoptosis, comet assay, cell migration, ROS, mitochondrial membrane potential, cell cycle arrest and expression of proteins were investigated.

One new imidazole derivative alkaloid pelopuradazole (1), together with three known alkaloids as in 3H-imidazole-4-carboxylic acid (2), 1H-pyrrole-2-carboxylic acid (3) and 2-methyl-3H-imidazole-4-carboxylic acid (4) and two known cyclo-dipeptides pelopurin A (5) and pelopurin B (6), has been isolated from the marine bacterium Pelomonas puraquae sp. nov. Pelopuradazole (1) was a new imidazole derivative alkaloid, while compounds 2, 3, 5 and 6 were firstly obtained as natural products. Compounds 1–6 were isolated from P. puraquae sp. nov. for the first time.

Two new dibenzoxanthenes compounds 1 and 2 have been synthesized and characterized by analytical and spectral methods. The crystal structure of compound 2 informs that the five rings of compound are almost planar. The DNA binding properties of two compounds were studied by absorption titration, viscosity measurement and luminescence. These results indicate that two compounds interact with calf thymus DNA through intercalative mode. Agarose gel electrophoresis experiment shows that PBR 322 DNA can be induced to cleave by two compounds under photoactivated condition. Compound 1 exhibits higher cytotoxicity than compound 2 toward MG-63, BEL-7402 and A549 cells. The apoptosis and cellular uptake of MG-63 cells were studied by fluorescence microscopy. Two compounds can also enhance the level of reactive oxygen species (ROS) and decrease the mitochondrial membrane potential. Compound 1 induces cell cycle arrest in G2/M phase and compound 2 induces cell cycle arrest in G0/G1 phase in MG-63.

The in vitro cytotoxicity, apoptosis, cellular uptake, cell cycle arrest, ROS, mitochondrial membrane potential, western blot analysis and DNA-binding induced by Ru1 were investigated.

Two new ruthenium(II) polypyridyl complexes [Ru(dmb)(2)(dcdppz)](ClO4)(2) (I) and [Ru(bpy)(2) (dcdppz)](ClO4)(2) (2) were prepared and characterized. The crystal structure of the complex 2 was solved by single crystal X-ray diffraction. The complex crystallizes in the monoclinic system, space group P2(1)/n with a = 12.9622(14) angstrom, b = 17.1619(19) angstrom, c = 22.7210(3) angstrom, beta = 100.930(2)degrees R = 0.0536, R-omega = 0.1111. The DNA-binding constants for complexes 1 and 2 were determined to be 1.92 x 10(5) (s = 1.72) and 2.24 x 10(5) (s = 1.86) M-1, respectively. The DNA-binding behaviors showed that complexes 1 and 2 interact with DNA by intercalative mode. The antioxidant activities of the ligand and the complexes were performed. Ligand, dcdppz, has no cytotoxicity against the selected cell lines. Complex 1 shows higher cytotoxicity than complex 2, but lower than cisplatin toward selected cell lines. The apoptosis and cell cycle arrest were investigated, and the apoptotic mechanism of BEL-7402 cells was studied by reactive oxygen species (ROS), mitochondrial membrane potential and western blot analysis. Complex 1 induces apoptosis in BEL-7402 cells through ROS-mediated mitochondrial dysfunction pathway and by regulating the expression of Bcl-2 family proteins. (C) 2014 Elsevier B.V. All rights reserved.

Eight novel N-benzoyl dehydroabietylamine derivatives with potential sterilization and antican-cer biological activities were analyzed through electrospray ionization tandem mass spectrometry ( ESI-IT-MS) .The results indicated that three types of derivatives exhibited their own typical ionization and frag -mentation process , due to their different 7-and 12-substituents on the dehydroabietylamine ring and differ-ent substituents on the benzoyl ring .In ( ±)-ESI-MS, the dimer ions of 7-oxime derivatives ( A) and 12-nitro derivatives ( C) could be more readily formed than that of 7-hydroxy derivatives ( B) .[ M-H2 O+H] +of A was observed in the positive-ion mode.C were prone to be ionized in the negative-ion mode. Two typical fragmentation peaks of [ M-35+H] +and [ M-H2 O+H] +were observed in ( +) -ESI-MS/MS spectra of 7-oxime dehydroabietylamine derivatives .The ion of [ M-H2 O+H] +formed from 18-acyl of ( A) could induce some even fragmentation ion peaks by loss of substituted benzonitrile .The ion of [M-H2O+H] +formed from 7-oxime of (A) can induce some odd fragmentation ion peaks by loss of substituted benzaldehyde .(B) showed more stability than (C) in (-)-ESI-MS/MS process.Fe-wer fragmentation ions of ( B) were obtained even though ( B) derivatives were collided with higher ener-gy.Ion fragmentation of ( B) and ( C) derivatives were induced by loss of neutral molecules of N-substi-tuted benzoyl methylene amine , substituted benzaldehyde or substituted benzene .Due to the strong elec-tron-withdrawing ability of 12-and 4'-nitro of ( C) derivatives , the neutral molecules lost from ( C) deriv-atives can be ionized by capturing one electron .

A new ligand dmdppz and its four ruthenium(II) polypyridyl complexes [Ru(dmb)2(dmdppz)](ClO4)2 (1), [Ru(bpy)2(dmdppz)](ClO4)2 (2), [Ru(phen)2(dmdppz)](ClO4)2 (3) and [Ru(dmp)2(dmdppz)](ClO4)2 (4) (where dmb, bpy, phen, dmp and dmdppz stand for 4,4′-dimethyl-2,2′-bipyridine, 2,2′-bipyridine, 1,10-phenanthroline, 2,9-dimethyl-1,10-phenanthroline and 5,8-dimethoxylpyrido[3,2-a:2′,3′-c]phenazine, respectively) have been synthesized and characterized. Their DNA binding behaviors show that the complexes bind to calf thymus DNA by intercalation. The complexes exhibit efficient photocleavage of pBR322 DNA on irradiation. The cytotoxicity of the ligand and the complexes toward HepG-2, HeLa, MG-63, A549 and BEL-7402 were assayed by MTT ((3-(4,5-dimethylthiazo-2-yl)-2,5-diphenyltetrazolium bromide)) method. The IC50 values of the complexes 1, 2, 3 and 4 toward BEL-7402 cells are 14.6, 16.8, 18.0 and 16.7μM, respectively. Dmdppz shows no cytotoxic activity against selected cell lines. The cellular uptake, apoptosis, comet assay, reactive oxygen species (ROS), mitochondrial membrane potential and western blot analysis were investigated. These results indicate that complexes 1–4 exert their toxicity through the intrinsic ROS-mediated mitochondrial pathway, which is accompanied by the regulation of Bcl-2 family proteins.

The aim of our study was to investigate DNA-binding and cytotoxic activity of the four new Ru(II) polypyridyl complexes [Ru(dmb)(2)(HMHPIP)](ClO4)(2) (1), [Ru(bpy)(2)(HMHPIP)I(ClO4)(2) (2), [Ru(Phen)(2) (HMHPIP)](ClO4)(2) (3) and [Ru(dmp)(2)(HMHPIP)](ClO4)(2) (4). The complexes interact with DNA through intercalative mode and show relatively high cytotoxic activity against A549 cells, no cytotoxicity toward MG-63 cells. Complexes 1-4 can enhance the levels of ROS in A549 cells and induce the decrease of the mitochondrial membrane potential. These complexes inhibit the cell growth in A549 cells at G0/G1 or S phase. Complex 3 activated caspase 7, and down-regulated the expression of the anti-apoptotic protein Bcl-2. Complexes 1-4 induce apoptosis in A549 cells through ROS-mediated mitochondrial dysfunction pathway. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.

Four new ruthenium(ii) complexes [Ru(bpy)2(NHPIP)](ClO4)2 (Ru-1), [Ru(phen)2(NHPIP)](ClO4)2 (Ru-2), [Ru(bpy)2(AHPIP)](ClO4)2 (Ru-3), and [Ru(phen)2(AHPIP)](ClO4)2 (Ru-4) (bpy = 2,2′-bipyridine; phen = 1,10-phenanthroline; NHPIP = 2-(3-nitro-4-hydroxylphenyl)imidazo[4,5-f][1,10]phenanthroline; AHPIP = 2-(3-amino-4-hydroxylphenyl)imidazo[4,5-f][1,10]phenanthroline) were synthesized and characterized by elemental analysis, electrospray mass spectrometry, and 1H NMR spectroscopy. The cytotoxicity in vitro of these complexes against BEL-7402, HeLa, MG-63, and MCF-7 cells was evaluated by the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) method. Ru-4 shows the highest cytotoxic activity towards the selected cell lines among the four complexes. The morphological apoptosis was assayed by an acridine orange/ethidium bromide staining method, and the percentages of necrotic and apoptotic cells were determined by flow cytometry. The cellular uptake and the cell cycle arrest in BEL-7402 cell was investigated. The results showed these complexes inhibit the proliferation of BEL-7402 cells at G0/G1 phase arrest. The detection of mitochondrial membrane potentials using the fluorescence probe JC-1 (5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolcarbocyanine iodide) exhibited that the mitochondrial membrane potentials decrease. Upon irradiation, these complexes can effectively cleave pBR322 DNA.

Two arene Ru(II) complexes [(eta(6)-RC6H5)Ru(m-MOPIP)Cl](+) (R=H 3a, R=CH3 3b; m-MOPIP=2-(3-methoxyphenyl)imidazole[4,5-f][1,10]phenanthroline) were prepared under the microwave irradiation at 60 degrees C for 30 min in Pyrex vessel with the yield of about 90% and 91%, and the target compounds were characterized by H-1 NMR, C-13 NMR, IR, ESI-MS and H-1-H-1 COSY spectra. At the same reaction conditions, application of SiC vessel to screen the effect of microwave irradiation, 3a and 3b were obtained with the yield of about 89% and 90%. These results indicated that the microwave "non-thermal effect" has no obvious influence on the synthesis of arene Ru(II) complexes.