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Salchow J, Mann J, Koch B, von Grundherr J, Jensen W, Elmers S, Straub LA, Vettorazzi E, Escherich G, Rutkowski S, Dwinger S, Bergelt C, Sokalska-Duhme M, Bielack S, Calaminus G, Baust K, Classen CF, Rössig C, Faber J, Faller H, Hilgendorf I, Gebauer J, Langer T, Metzler M, Schuster S, Niemeyer C, Puzik A, Reinhardt D, Dirksen U, Sander A, Köhler M, Habermann JK, Bokemeyer C, Stein A. Comprehensive assessments and related interventions to enhance the long-term outcomes of child, adolescent and young adult cancer survivors - presentation of the CARE for CAYA-Program study protocol and associated literature review. BMC Cancer 2020; 20:16. [PMID: 31906955 PMCID: PMC6945396 DOI: 10.1186/s12885-019-6492-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 12/23/2019] [Indexed: 12/21/2022] Open
Abstract
Background Improved, multimodal treatment strategies have been shown to increase cure rates in cancer patients. Those who survive cancer as a child, adolescent or young adult (CAYA), are at a higher risk for therapy-, or disease-related, late or long-term effects. The CARE for CAYA-Program has been developed to comprehensively assess any potential future problems, to offer need-based preventative interventions and thus to improve long-term outcomes in this particularly vulnerable population. Methods The trial is designed as an adaptive trial with an annual comprehensive assessment followed by needs stratified, modular interventions, currently including physical activity, nutrition and psycho-oncology, all aimed at improving the lifestyle and/or the psychosocial situation of the patients. Patients, aged 15–39 years old, with a prior cancer diagnosis, who have completed tumour therapy and are in follow-up care, and who are tumour free, will be included. At baseline (and subsequently on an annual basis) the current medical and psychosocial situation and lifestyle of the participants will be assessed using a survey compiled of various validated questionnaires (e.g. EORTC QLQ C30, NCCN distress thermometer, PHQ-4, BSA, nutrition protocol) and objective parameters (e.g. BMI, WHR, co-morbidities like hyperlipidaemia, hypertension, diabetes), followed by basic care (psychological and lifestyle consultation). Depending on their needs, CAYAs will be allocated to preventative interventions in the above-mentioned modules over a 12-month period. After 1 year, the assessment will be repeated, and further interventions may be applied as needed. During the initial trial phase, the efficacy of this approach will be compared to standard care (waiting list with intervention in the following year) in a randomized study. During this phase, 530 CAYAs will be included and 320 eligible CAYAs who are willing to participate in the interventions will be randomly allocated to an intervention. Overall, 1500 CAYAs will be included and assessed. The programme is financed by the innovation fund of the German Federal Joint Committee and will be conducted at 14 German sites. Recruitment began in January 2018. Discussion CAYAs are at high risk for long-term sequelae. Providing structured interventions to improve lifestyle and psychological situation may counteract against these risk factors. The programme serves to establish uniform regular comprehensive assessments and need-based interventions to improve long-term outcome in CAYA survivors. Trial registration Registered at the German Clinical Trial Register (ID: DRKS00012504, registration date: 19th January 2018).
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Singh VK, Singh V, Yadav PK, Chandra S, Bano D, Koch B, Talat M, Hasan SH. Nitrogen doped fluorescent carbon quantum dots for on-off-on detection of Hg2+ and glutathione in aqueous medium: Live cell imaging and IMPLICATION logic gate operation. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.112042] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Singh AK, Singh VK, Singh M, Singh P, Khadim SR, Singh U, Koch B, Hasan S, Asthana R. One pot hydrothermal synthesis of fluorescent NP-carbon dots derived from Dunaliella salina biomass and its application in on-off sensing of Hg (II), Cr (VI) and live cell imaging. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.02.023] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gupta RC, Dwivedi SK, Razi SS, Singh P, Koch B, Misra A. A Chemodosimeter Exhibiting Fluorescence “Turn‐On” Response to Detect Copper(II) Ions: Cell Imaging and Logic Function. ChemistrySelect 2019. [DOI: 10.1002/slct.201900292] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Adams S, Kojima C, Britt J, Miller M, Koch B, Andrae J, Duckett S. 39 Investigation of Ovine DRD2. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Basu Baul TS, Longkumer I, Duthie A, Singh P, Koch B, Guedes da Silva MFC. Triphenylstannyl((arylimino)methyl)benzoates with selective potency that induce G1 and G2/M cell cycle arrest and trigger apoptosis via ROS in human cervical cancer cells. Dalton Trans 2018; 47:1993-2008. [PMID: 29345708 DOI: 10.1039/c7dt04037g] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Metal complexes with organelle specificity and potent but selective cytotoxicity are highly desirable. A novel series of triphenylstannyl 4-((arylimino)methyl)benzoates (2-8) were obtained by the reactions of triphenylstannyl 4-formylbenzoate [Ph3Sn(L1)] 1 with primary aromatic amines. Two representative compounds (10, 11) were also synthesized by reacting aqua-triphenylstannyl 2-formylbenzoate [Ph3Sn(L9)(H2O)] (9) with aniline and p-fluoroaniline, respectively. These compounds were characterized by elemental analysis, IR and 1H, 13C and 119Sn NMR spectroscopy, as well as single-crystal X-ray diffraction for compounds 5, 7-11 and three pro-ligands. The in vitro cytotoxic activities of 1-11 were assessed using the MTT tetrazolium dye assay against HeLa (human cervical) and MDA-MB-231 (breast) cancer cells, with IC50 values revealing high activity. Compared to cisplatin, compounds 1-11 exhibited enhanced cytotoxic efficacy, indicating their potential as potent anticancer agents. Among these, 1 and 5 demonstrated maximum inhibition in HeLa cells, with negligible effect on normal human embryonic kidney (HEK) cells. The combined results of the DCFH-DA dye and Hoechst 33342/PI nuclear staining assays, along with flow cytometry analysis, show that they possess a dual mode of action: They induced apoptotic cell death, attributable to the tin-assisted generation of reactive oxygen species. Cell cycle analyses indicated that compounds 1 and 5 exhibit cell growth inhibition and may cause turbulences in the G1 and G2/M phases.
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Dwivedi SK, Gupta RC, Srivastava P, Singh P, Koch B, Maiti B, Misra A. Dual Fluorophore Containing Efficient Photoinduced Electron Transfer Based Molecular Probe for Selective Detection of Cr3+ and PO43– Ions through Fluorescence “Turn–On–Off” Response in Partial Aqueous and Biological Medium: Live Cell Imaging and Logic Application. Anal Chem 2018; 90:10974-10981. [DOI: 10.1021/acs.analchem.8b02570] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Mukhopadhyay S, Singh RS, Paitandi RP, Sharma G, Koch B, Pandey DS. Influence of substituents on DNA and protein binding of cyclometalated Ir(iii) complexes and anticancer activity. Dalton Trans 2018. [PMID: 28640302 DOI: 10.1039/c7dt01015j] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Synthesis of terpyridyl based ligands 3-([2,2':6',2''-terpyridin]-4'-yl)-7-methoxy-2-(methylthio)-quinolone, (L1); 3-([2,2':6',2''-terpyridin]-4'-yl)-6-methoxyquinolin-2(1H)-one, (L2); 3-([2,2'-:6',2''-terpyridin]-4'-yl)-6-methylquinolin-2(1H)-one (L3) and cyclometalated iridium(iii) complexes [[Ir(ppy)2L1]+PF6- (1), [Ir(ppy)2L2]+PF6- (2), [Ir(ppy)2L3]+PF6- (3) (2-phenylpyridine = Hppy)] involving these ligands has been described. The ligands L1-L3 and complexes 1-3 have been thoroughly characterized by elemental analyses, spectral studies (IR, 1H, 13C NMR, UV/vis and fluorescence) ESI-MS, and the structure of 3 has been unambiguously authenticated by single crystal X-ray analyses. UV/vis, fluorescence and circular dichroism spectroscopic studies showed rather efficient binding of 1 with CT-DNA (calf thymus DNA) and BSA (bovine serum albumin) relative to 2 and 3. Molecular docking studies unveiled binding of 1-3 with minor groove of CT-DNA via van der Waal's forces and electrostatically with the hydrophobic moiety of HSA (human serum albumin). The ligands and complexes exhibited moderate cytotoxicity towards MDA-MB-231 (breast cancer cell line) and significant influence on HeLa (cervical cancer cell line) cells. Cytotoxicity, morphological changes, and apoptosis have been followed by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide) assay, Hoechst 33342/PI (PI = propidium iodide) staining, cell cycle analysis by FACS (fluorescence activated cell sorting), and ROS (reactive oxygen species) generation by DCFH-DA (dichlorodihydrofluorescein diacetate) dye. Confocal microscopy images revealed that the drug efficiently initiates apoptosis in the cell cytosol. The IC50 values showed superior cytotoxicity of 1-3 against the HeLa cell line relative to cisplatin, and their ability to induce apoptosis is in the order 1 > 2 > 3.
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Dwinger S, Bergelt C, Koch B, Salchow J, Grundherr J, Schulz-Kindermann F, Quidde J, Bokemeyer C, Stein A. CARE-for-CAYA: Erste Erfahrungen aus einem Präventionskonzept für junge Menschen nach Krebserkrankung mit Fokus auf das Psychoonkologie-Modul. Psychother Psychosom Med Psychol 2018. [DOI: 10.1055/s-0038-1667914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Biswas A, Mukhopadhyay S, Singh RS, Kumar A, Rana NK, Koch B, Pandey DS. Manipulating Metallogel Properties by Luminogens and Their Applications in Cell Imaging. ACS OMEGA 2018; 3:5417-5425. [PMID: 30023918 PMCID: PMC6044964 DOI: 10.1021/acsomega.7b01837] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 02/16/2018] [Indexed: 06/08/2023]
Abstract
Manipulating gelation properties of the isomeric zinc-terpyridine complexes C-1 (nongelator) and C-2 (gelator) using three different luminescent dyes, viz., acridine yellow (AY), ethidium bromide (EB), and azido-boron dipyrromethene, have been described. Hybrid gels created by the combination of C-1, C-2, and above-mentioned dyes have been termed complex-luminogen mixed gels (CLMGs). Ensuing CLMGs have been thoroughly characterized by spectral, morphological, and rheological studies. Cytotoxicity measurements and imaging against breast cancer cell line MDA-MB-231 unveiled that three out of the five CLMGs can be effectively used for cell imaging. Interestingly, direct use of the metal-containing hybrid gels for live cell imaging which is a distinctive approach, has been successfully achieved with significantly encouraging results.
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Prasad R, Rana NK, Koch B. Dendrobium chrysanthum ethanolic extract induces apoptosis via p53 up-regulation in HeLa cells and inhibits tumor progression in mice. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2018; 14:/j/jcim.ahead-of-print/jcim-2016-0070/jcim-2016-0070.xml. [PMID: 28195549 DOI: 10.1515/jcim-2016-0070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 10/18/2016] [Indexed: 11/15/2022]
Abstract
Background Dendrobium is one of the diverse genus of orchid plants. It possesses a number of pharmacological activities and has long been used in traditional system of medicine. The goal of this study was to investigate the apoptosis inducing property of the ethanolic extract from the leaves of Dendrobium chrysanthum, a species of Dendrobium whose anticancer role has not been ascertained yet. Methods To evaluate the anticancer activity of the ethanolic extract of D. chrysanthum in vitro in HeLa (human cervical cancer) cells, cytotoxic activity, generation of reactive oxygen species (ROS), induction of apoptosis and effect on cell cycle were determined. The in vivo study was carried out in Dalton's lymphoma (DL) bearing mice to assess the tumor growth delay. Results Our study demonstrated that the ethanolic extract showed dose-dependent cytotoxicity against HeLa cells. The extract exhibited dose-dependent increase in ROS production as well as apoptotic cell death which was further confirmed through presence of DNA fragmentation. Cell cycle analysis by flow cytometry suggests that the ethanolic extract perturbed cell cycle progression and leads to the delay of the cells in S phase. Further, the real-time PCR studies also showed up-regulation of apoptotic genes p53 and Bax. The in vivo antitumor activity exhibited significant increase in the life span of DL bearing mice as compared to control with significant decrease in abdominal size along with reduced tumor ascites. Conclusions These observations demonstrate the anticancer potential of the D. chrysanthum ethanolic extract mediated through p53-dependent apoptosis.
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Justice SMM, Britt J, Jr. MM, Greene M, Davis C, Koch B, Duckett S, Jesch E. Predictions of Lean Meat Yield in Lambs Using Dexa and Chemical Analyses Proximate. MEAT AND MUSCLE BIOLOGY 2018. [DOI: 10.22175/rmc2018.162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Singh VK, Singh V, Yadav PK, Chandra S, Bano D, Kumar V, Koch B, Talat M, Hasan SH. Bright-blue-emission nitrogen and phosphorus-doped carbon quantum dots as a promising nanoprobe for detection of Cr(vi) and ascorbic acid in pure aqueous solution and in living cells. NEW J CHEM 2018. [DOI: 10.1039/c8nj02126k] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Efficient synthesis of N,P-CQDs via a one-step hydrothermal method with a high quantum yield for potential applications in turn-off and turn-on detections of Cr(vi) and AA in vitro in living cells.
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Jr. MFM, Britt J, Adams S, Koch B, Andrae J, Duckett S. Prenatal and Postnatal Lamb Muscle Growth as Influenced by Ergot Alkaloid Exposure in Utero. MEAT AND MUSCLE BIOLOGY 2018. [DOI: 10.22175/rmc2018.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Gupta SR, Singh P, Koch B, Singh VP. A water soluble, highly sensitive and selective fluorescent probe for Al3+ ions and its application in live cell imaging. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.08.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Thors L, Koch M, Wigenstam E, Koch B, Hägglund L, Bucht A. Comparison of skin decontamination efficacy of commercial decontamination products following exposure to VX on human skin. Chem Biol Interact 2017; 273:82-89. [DOI: 10.1016/j.cbi.2017.06.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/15/2017] [Accepted: 06/05/2017] [Indexed: 10/19/2022]
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Goutam J, Sharma G, Tiwari VK, Mishra A, Kharwar RN, Ramaraj V, Koch B. Isolation and Characterization of "Terrein" an Antimicrobial and Antitumor Compound from Endophytic Fungus Aspergillus terreus (JAS-2) Associated from Achyranthus aspera Varanasi, India. Front Microbiol 2017; 8:1334. [PMID: 28790982 PMCID: PMC5526331 DOI: 10.3389/fmicb.2017.01334] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 06/30/2017] [Indexed: 12/25/2022] Open
Abstract
The present study aimed at characterizing biological potentials of endophyte Aspergillus terreus JAS-2 isolated from Achyranthus aspera. Crude extracted from endophytic fungus JAS-2 was purified and chemically characterized by chromatographic and spectroscopic studies respectively. Spectral assignment of NMR (nuclear magnetic resonance) data, 1H proton and 13C carbon analysis along with FTIR data elucidated the structure of compound as 4,5-Dihydroxy-3-(1-propenyl)-2-cyclopenten-1-one. After purification and identification a set of experiment was conducted to explore efficacy of compound. Results revealed that on accessing the antifungal activity of compound, growth diameter of tested phytopathogenic fungi was reduced to 50% at higher concentration taken (10 μgμl−1). Compound exhibited in-vitro bacterial cell inhibition at 20 μgml−1 concentration along with moderate antioxidant behavior. Evaluation of anticancer activity against human lung cancer cell line (A-549) exhibited its IC50 value to be 121.9 ± 4.821 μgml−1. Further cell cycle phase distribution were analyzed on the basis of DNA content and evaluated by FACS (Fluorescence Activated Cell Sorting) and it was revealed that at 150 μgml−1 of compound maximum cells were found in sub G1 phase which represents apoptotic dead cells. Terrein (4, 5-Dihydroxy-3-(1-propenyl)-2-cyclopenten-1-one) a multi-potential was isolated from endophytic fungus JAS-2, from well recognized medicinal herb A. aspera. To best of our knowledge, this is the first report of “Terrein” from endophytic derived fungus. This compound had also exhibited anticancer and antifungal activity against human lung cancer cell line A-549 and Bipolaris sorokiniana respectively which is causal organism of many plants disease. Hence endophytes are serving as alternative sources of drug molecules.
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Paul A, Hazra S, Sharma G, Guedes da Silva MFC, Koch B, Pombeiro AJL. Unfolding biological properties of a versatile dicopper(II) precursor and its two mononuclear copper(II) derivatives. J Inorg Biochem 2017; 174:25-36. [PMID: 28599129 DOI: 10.1016/j.jinorgbio.2017.05.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/26/2017] [Accepted: 05/30/2017] [Indexed: 11/30/2022]
Abstract
Synthesis, inter-conversions and biological study of the dichloro bridged dicopper(II) compound [CuLCl]2 (1) and its two mononuclear derivatives [CuLCl(H2O)]·H2O (2) and [CuLCl(py)] (3) (HL=2-(2-pyridylmethyleneamino)benzenesulfonic acid) are described. The dimeric compound 1 collapses into monomers 2 and 3 in the presence of coordinating solvents, water and pyridine, respectively, and 1 is regenerated upon simple stirring of 2 or 3 in methanol. The reactions of 1 with neutral (present study) and charged (earlier studies) ligands result in monomeric and multimeric compounds, respectively, attesting that it is a versatile dicopper(II) precursor. The anticancer activity of these copper complexes (1-3) was screened against lung (A-549) and breast (MDA-MB-231) human cancer cell lines. The IC50 (half maximal inhibitory concentration) value for one (3) of the compounds suggests preferential cytotoxicity against breast cancer MDA-MB-231 cell line. Furthermore, the IC50 value obtained for complex 3 is found to be almost two-fold times cytotoxic than the standard drug cisplatin. In addition, the underlying possible mechanism of its apoptosis-inducing efficacy in MDA-MB-231 cells has been rationalized by using flow cytometry (FACS) and Hoechst 33342/propidium iodide (PI) fluorescence staining. The stimulation of apoptotic induction for complex 3 has further been affirmed by reactive oxygen species (ROS) generation and mitochondrial aggregations studies.
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Agrawal P, Singh RP, Sonali, Kumari L, Sharma G, Koch B, Rajesh CV, Mehata AK, Singh S, Pandey BL, Muthu MS. TPGS-chitosan cross-linked targeted nanoparticles for effective brain cancer therapy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 74:167-176. [DOI: 10.1016/j.msec.2017.02.008] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 11/24/2016] [Accepted: 02/03/2017] [Indexed: 10/20/2022]
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Basu Baul TS, Dutta D, Duthie A, Prasad R, Rana NK, Koch B, Tiekink ERT. Triphenyltin(IV) benzoates with diazenyl/imino scaffold exhibiting remarkable apoptosis mediated by reactive oxygen species. J Inorg Biochem 2017; 173:79-92. [PMID: 28505480 DOI: 10.1016/j.jinorgbio.2017.04.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 03/25/2017] [Accepted: 04/23/2017] [Indexed: 01/13/2023]
Abstract
The cytotoxic potency of a series of triphenyltin(IV) compounds of general composition [Ph3Sn(Ln)] (1-6) has been probed in vitro employing MDA-MB-231 (human breast cancer) and HeLa (human cervical cancer) cell lines, where Ln=L1-3; isomeric 2/3/4-{(E)-2-[4-(dimethylamino)phenyl]diazenyl}benzoates and L4-6 are their corresponding isoelectronic imino analogues 2/3/4-[(E)-{[4-(dimethylamino)phenyl]methylidene}amino]benzoates. Compounds 1-6 have been characterized by elemental analysis and their spectroscopic properties were studied using IR and NMR (1H, 13C, 119Sn) techniques. The molecular structures of a pro-ligand 2-[(E)-{[4-(dimethylamino)phenyl]methylidene}amino]benzoic acid (HL4) and two representative molecules, Ph3Sn(L2) 2 and Ph3Sn(L5) 5, have been determined by X-ray crystallography. Structural analyses of 2 and 5 revealed distorted tetrahedral geometries within C3O donor sets owing to monodentate modes of coordination of the respective carboxylate ligands, close intramolecular Sn…O(carbonyl) interactions notwithstanding. Cytotoxic studies in vitro in MDA-MB-231 and HeLa cell lines revealed high activity, in sub-micromolar range, for all investigated compounds. Among these, 1 and 3 exhibited potent cytotoxicity most effectively towards MDA-MB-231 cells with a IC50 value of 1.19 and 1.44μM, respectively, whereas 5 showed remarkable activity towards HeLa cells with a IC50 value of 0.88μM, yet the series of compounds had minimal cytotoxic effect on normal HEK 293 (human embryonic kidney) cell line. The underlying investigation suggested that the compounds exert potent antitumor effect by elevating intracellular reactive oxygen species generation and cause delay in cell cycle by inhibiting cells at G2/M phase. The results presented herein suggest further development of this class of triphenyltin(IV) compounds-based drugs as potential anti-cancer therapies should be pursued.
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Thors L, Lindberg S, Johansson S, Koch B, Koch M, Hägglund L, Bucht A. RSDL decontamination of human skin contaminated with the nerve agent VX. Toxicol Lett 2017; 269:47-54. [PMID: 28179194 DOI: 10.1016/j.toxlet.2017.02.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 01/30/2017] [Accepted: 02/04/2017] [Indexed: 11/19/2022]
Abstract
Dermal exposure to low volatile organophosphorus compounds (OPC) may lead to penetration through the skin and uptake in the blood circulation. Skin decontamination of toxic OPCs, such as pesticides and chemical warfare nerve agents, might therefore be crucial for mitigating the systemic toxicity following dermal exposure. Reactive skin decontamination lotion (RSDL) has been shown to reduce toxic effects in animals dermally exposed to the nerve agent VX. In the present study, an in vitro flow-through diffusion cell was utilized to evaluate the efficacy of RSDL for decontamination of VX exposed to human epidermis. In particular, the impact of timing in the initiation of decontamination and agent dilution in water was studied. The impact of the lipophilic properties of VX in the RSDL decontamination was additionally addressed by comparing chemical degradation in RSDL and decontamination efficacy between the VX and the hydrophilic OPC triethyl phosphonoacetate (TEPA). The epidermal membrane was exposed to 20, 75 or 90% OPC diluted in deionized water and the decontamination was initiated 5, 10, 30, 60 or 120min post-exposure. Early decontamination of VX with RSDL, initiated 5-10min after skin exposure, was very effective. Delayed decontamination initiated 30-60min post-exposure was less effective but still the amount of penetrated agent was significantly reduced, while further delayed start of decontamination to 120min resulted in very low efficacy. Comparing RSDL decontamination of VX with that of TEPA showed that the decontamination efficacy at high agent concentrations was higher for VX. The degradation mechanism of VX and TEPA during decontamination was dissected by 31P NMR spectroscopy of the OPCs following reactions with RSDL and its three nucleophile components. The degradation rate was clearly associated with the high pH of the specific solution investigated; i.e. increased pH resulted in a more rapid degradation. In addition, the solubility of the OPC in RSDL also influenced the degradation rate since the degradation of VX was significantly faster when the NMR analysis was performed in the organic solvent acetonitrile compared to water. In conclusion, we have applied the in vitro flow-through diffusion cell for evaluation of skin decontamination procedures of human epidermis exposed to OPCs. It was demonstrated that early decontamination is crucial for efficient mitigation of epidermal penetration of VX and that almost complete removal of the nerve agent from the skin surface is possible. Our data also indicate that the pH of RSDL together with the solubility of OPC in RSDL are of primary importance for the decontamination efficacy.
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Agrawal P, Sonali, Singh RP, Sharma G, Mehata AK, Singh S, Rajesh CV, Pandey BL, Koch B, Muthu MS. Bioadhesive micelles of d-α-tocopherol polyethylene glycol succinate 1000: Synergism of chitosan and transferrin in targeted drug delivery. Colloids Surf B Biointerfaces 2017; 152:277-288. [PMID: 28122295 DOI: 10.1016/j.colsurfb.2017.01.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 12/19/2016] [Accepted: 01/12/2017] [Indexed: 11/28/2022]
Abstract
The aim of this work was to prepare targeted bioadhesive d-α- tocopheryl glycol succinate 1000 (TPGS) micelles containing docetaxel (DTX) for brain targeted cancer therapy. Considering the unique bioadhesive feature of chitosan, herein, we have developed a synergistic transferrin receptor targeted bioadhesive micelles using TPGS conjugated chitosan (TPGS-chitosan), which target the overexpressed transferrin receptors of glioma cells for brain cancer therapy. The micelles were prepared by the solvent casting method and characterized for their particle size, polydispersity, zeta-potential, surface morphology, drug encapsulation efficiency, and in-vitro release. The IC50 values demonstrated transferrin receptor targeted TPGS-chitosan micelles could be 248 folds more effective than Docel™ after 24h treatment with the C6 glioma cells. Further, time dependent bioadhesive cellular uptake study indicated that a synergistic effect was achieved with the chitosan and transferrin in targeted TPGS-chitosan micelles through the biodhesive property of chitosan as well as transferrin receptor mediated endocytosis. The in-vivo pharmacokinetic results demonstrated that relative bioavailability of non-targeted and targeted micelles were 2.89 and 4.08 times more effective than Docel™ after 48h of treatments, respectively.
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Singh VK, Prasad R, Koch B, Hasan SH, Dubey M. Pyrene–fluorescein-based colour-tunable AIE-active hybrid fluorophore material for potential live cell imaging applications. NEW J CHEM 2017. [DOI: 10.1039/c7nj00106a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A novel hybrid fluorophore (FHPY) has been synthesized based on two standard fluorescent hydrophobic–hydrophilic molecules, viz. pyrene and fluorescein, with an objective to tune the AIE along with the morphology and live cell imaging.
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49
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Paitandi RP, Singh RS, Mukhopadhyay S, Sharma G, Koch B, Vishnoi P, Pandey DS. Synthesis, characterization, DNA binding and cytotoxicity of fluoro-dipyrrin based arene ruthenium(II) complexes. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.03.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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50
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Cai C, Koch B, Akhras S, Hildt E, Zeuzem S, Lange CM. Macrophage-derived extracellular vesicles mediate a long-lasting innate immune response against hepatitis C virus. ZEITSCHRIFT FÜR GASTROENTEROLOGIE 2016. [DOI: 10.1055/s-0036-1597522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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