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Träfflista för sökning "WFRF:(Larsson Rolf) srt2:(2005-2009)"

Sökning: WFRF:(Larsson Rolf) > (2005-2009)

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1.
  • Christensen, Kjeld, et al. (författare)
  • Effects on blood compatibility in vitro by combining a direct P2Y(12) receptor inhibitor and heparin coating of stents
  • 2006
  • Ingår i: Platelets. - 0953-7104. ; 17:5, s. 318-327
  • Tidskriftsartikel (refereegranskat)abstract
    • The effect of the direct platelet P2Y12 receptor inhibitor, AR-C69931MX, on activation of blood induced by stents with and without heparin coating was investigated using a whole blood Chandler loop model in vitro . Stents were deployed in Chandler loops. Fresh human blood with heparin and AR-C69931MX was rotated for 1 h at 37°C and used for measurements of platelets, microparticles, thrombin-antithrombin complex (TAT), fibrinogen binding to platelets, P-selectin expression by platelets, CD11b, Prothrombin Fragment F1+2, FXIa-AT, FXIIa-AT, C3a, sC5b-9 and stent score. In the first experiment there were four study groups with unmodified stents: 1a, no AR-C69931MX; 1b, 250 nmol/L; 1c, 750 nmol/L; 1d, 2250 nmol/L of AR-C69931MX. In the second experiment the concentration of AR-C69931MX was 500 nmol/L: 2a; tubings without stent; 2b; tubings with heparin-coated stent; 2c; tubings with unmodified stents. Heparin-coated stents were used in the third experiment: 3a; no AR-C69931MX; 3b; 500 nmol/L of AR-C69931MX. In the first experiment there were significant differences in all parameters analysed except for C3a, and stent score when the group with no AR-C69931MX was compared to all the groups with AR-C69931MX. In the second experiment there were significant differences in platelet count, TAT, FXIa-AT, FXIIa-AT and stent score when unmodified stents were compared to loops with no stents and partly to loops with heparin-coated stents. In the third experiment there was a significant reduction in generation of TAT, stent score and better preservation of platelet number by combining the platelet inhibitor and heparin-coated stents as compared to heparin-coated stents alone. The conclusion is that the direct P2Y12 receptor inhibitor AR-C69931MX reduced the different aspects of activation of blood induced by both unmodified and heparin-coated stents.
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  • Larsson, Dhana E., et al. (författare)
  • Combination analyses of anti-cancer drugs on human neuroendocrine tumor cell lines
  • 2009
  • Ingår i: Cancer Chemotherapy and Pharmacology. - 0344-5704. ; 65:1, s. 5-12
  • Tidskriftsartikel (refereegranskat)abstract
    • PURPOSE: There is a large need for better pharmacological treatment of neuroendocrine tumors. The aim of this study was to investigate and quantify the cytotoxic potentiating effects resulting from a combination of five substances, NSC 95397, emetine, CGP-74514A hydrochloride, Brefeldin A and sanguinarine chloride, chosen from a previous screening of 1,280 pharmacologically active agents on neuroendocrine tumor cells, with standard cytotoxic agents currently used in the treatment of neuroendocrine tumors.METHOD:The human pancreatic carcinoid cell line BON-1, human typical bronchial carcinoid cell line NCI-H727 and the human atypical bronchial carcinoid cell line NCI-H720 were used. Combinations between doxorubicin, etoposide, oxaliplatin, docetaxel, and each one of the five agents were studied and simultaneous exposures were explored using the median-effect method.RESULTS:Most of the combinations of NSC-95397 and emetine with doxorubicin, etoposide, docetaxel, and oxaliplatin showed synergism, and their remaining combinations were additive. Almost all of the CGP-74514A hydrochloride interactions were additive, while brefeldin A and sanguinarine displayed less synergy but more additive and antagonistic interactions in combination with the standard drugs.CONCLUSION: The synergistic and additive interactions make NSC-95397, emetine, and CGP-74514A hydrochloride potential candidates for incorporation into combination chemotherapy regimens and these drugs might be the suitable candidates for further clinical studies in patients with bronchial carcinoids and pancreatic endocrine tumors.
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  • Larsson, Dhana E., et al. (författare)
  • Identification and evaluation of potential anti-cancer drugs on human neuroendocrine tumor cell lines
  • 2006
  • Ingår i: Anticancer Research. - 0250-7005. ; 26:6B, s. 4125-4129
  • Tidskriftsartikel (refereegranskat)abstract
    • The aim of this study was to investigate drug sensitivity in neuroendocrine tumor cell lines. Materials and Methods: In vitro drug sensitivity screening was performed using the fluorometric microculture cytotoxicity assay in one human pancreatic carcinoid and two human bronchial carcinoid cell lines. In addition, a normal human retinal pigment epithelial cell line was used for comparison. A total of 18 drugs with different mechanisms of action were tested. Results: The most active agents were brefeldin A, emetine, bortezomib and idarubicin, having IC50 values < 1 μM in all four cell lines. In addition, the three tumor cell lines showed sensitivity for sanguinarine, Bay11-7085, mitoxantrone, doxorubicin, β-lapachone, NSC 95397 and CGP-74514A. Conclusion: The cell lines were sensitive for several drugs acting in different ways, covering a broad spectrum of mechanisms of action. Some of these compounds may possibly be used in clinical trials and show therapeutic effect in patients with neuroendocrine tumors.
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6.
  • Ahlin, Gustav, et al. (författare)
  • Structural requirements for drug inhibition of the liver specific human organic cation transport protein 1
  • 2008
  • Ingår i: Journal of Medicinal Chemistry. - 0022-2623. ; 51:19, s. 5932-5942
  • Tidskriftsartikel (refereegranskat)abstract
    • The liver-specific organic cation transport protein (OCT1; SLC22A1) transports several cationic drugs including the antidiabetic drug metformin and the anticancer agents oxaliplatin and imatinib. In this study, we explored the chemical space of registered oral drugs with the aim of studying the inhibition pattern of OCT1 and of developing predictive computational models of OCT1 inhibition. In total, 191 structurally diverse compounds were examined in HEK293-OCT1 cells. The assay identified 47 novel inhibitors and confirmed 15 previously known inhibitors. The enrichment of OCT1 inhibitors was seen in several drug classes including antidepressants. High lipophilicity and a positive net charge were found to be the key physicochemical properties for OCT1 inhibition, whereas a high molecular dipole moment and many hydrogen bonds were negatively correlated to OCT1 inhibition. The data were used to generate OPLS-DA models for OCT1 inhibitors; the final model correctly predicted 82% of the inhibitors and 88% of the noninhibitors of the test set.
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  • Andersson, Claes R., et al. (författare)
  • In vitro drug sensitivity-gene expression correlations involve a tissue of origin dependency
  • 2007
  • Ingår i: Journal of chemical information and modeling. - 1549-9596. ; 47:1, s. 239-248
  • Tidskriftsartikel (refereegranskat)abstract
    • A major concern of chemogenomics is to associate drug activity with biological variables. Several reports have clustered cell line drug activity profiles as well as drug activity-gene expression correlation profiles and noted that the resulting groupings differ but still reflect mechanism of action. The present paper shows that these discrepancies can be viewed as a weighting of drug-drug distances, the weights depending on which cell lines the two drugs differ in.
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