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  • 1
    Electronic Resource
    Electronic Resource
    Reactive oligonucleotide derivatives and sequence-specific modification of nucleic acids
    Amsterdam : Elsevier
    Biochimie 67 (1985), S. 785-789 
    Details
    ISSN: 0300-9084
    Keywords: DNA ; DNA chain breaks ; chemical modification ; coupures de chaines ; modification selective ; oligonucleotides ; oligonucleotides ; polynucleotides ; targeted reagents
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0300-9084(85)80168-1
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Antikoagulation bei supraventrikulären Tachyarrhythmien Klinischer Nutzen und therapeutisches Risiko (1998)
    Springer
    Der Internist 39 (1998), S. 38-45 
    Details
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Azetylsalizylsäure ; Antikoagulation ; Embolie ; arterielle ; Tachyarrhythmien ; supraventrikuläre ; Vorhofflimmern
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema Als begleitende Präventionsmaßnahme im Hinblick auf das Thromboembolie-Risiko hat sich die Antikoagulation neben der medikamentösen antiarrhythmischen Behandlung supraventrikulärer Tachyarrhythmien bewährt. Grundlage dafür sind mehrere seit 1989 publizierte Studien zur Primär- bzw. Sekundärprävention arterieller Embolien bei Vorhofflimmern. Über die Ergebnisse und die daraus abgeleiteten differenzierten Therapieempfehlungen in Abhängigkeit von den klinischen Verlaufsformen supraventrikulärer Tachyarrhythmien wird hier eingehend referiert. Unbestritten ist die prinzipielle Überlegenheit einer oralen Antikoagulation bei supraventrikulären Tachyarrhythmien, besonders beim Vorhofflimmern. Das gilt auch im Vergleich mit der Embolieprophylaxe durch ASS. Nicht außer Betracht bleiben darf aber das mit der Cumaringabe verbundene Blutungsrisiko. Darauf sei ausdrücklich hingewiesen, da dieses in der ambulanten Praxis, also außerhalb von Studienbedingungen, sicher einen anderen Stellenwert hat. Gründe dafür dürften höhere Komorbitität, höheres Lebensalter der Patienten und möglicherweise auch eine weniger exakte Überwachung der Antikoagulation sein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001080050142
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Cooperative Interactions in Photosensitized Modification of DNA with Oligonucleotide-derived Binary Reagents (2000)
    Springer
    Molecular biology 34 (2000), S. 814-822 
    Details
    ISSN: 1608-3245
    Keywords: DNA ; kinetics ; oligonucleotide derivatives ; photomodification ; sensitization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Quantitative characteristics of thermodynamic and kinetic cooperativity arising in the process of photomodification of a single-stranded DNA fragment with binary systems of oligonucleotide conjugates forming an active site on the target were studied. Oligonucleotides of the binary system were complementary to adjacent segments of the DNA target, and contained arylazide (X) and perylene (S) residues covalently attached to their terminal phosphates. Upon irradiation at the perylene absorption wavelength, the target was modified by the arylazide residue, which was activated owing to the contiguity with the sensitizing perylene group in the tandem complex. Basing on the kinetic data, the constants of association of both derivatives of oligonucleotides with the target were determined: K x = 1.13 · 106 M–1, K s = 1.49 · 104 M–1. It was determined that association of both oligonucleotides with the target proceeded with a positive cooperativity characterized by parameter α = 45. The kinetic cooperativity parameter β was found to be approximately equal to 200; this characterized the acceleration of target modification in complex with the binary reagent versus that in the absence of sensitizer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026619607955
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Reactive oligonucleotide derivatives as gene-targeted biologically active compounds and affinity probes (1991)
    Springer
    Genetica 85 (1991), S. 53-63 
    Details
    ISSN: 1573-6857
    Keywords: Antisense oligonucleotides ; affinity modification ; DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Development of efficient methods for synthesis of oligonucleotides and oligonucleotide analogs has opened up the possibility of designing a broad spectrum of affinity reagents for specific modification of nucleic acids and proteins. These affinity reagents are used for investigation of the topology of ribosomes and nucleic acid polymerases. Oligonucleotides and their analogs are already used for suppression of specific gene expression and for elucidation of the physiological role of their products. Oligonucleotide derivatives appear to offer considerable promise as potential gene-targeted drugs such as antivirals and specific inhibitors of oncogene expression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00056106
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Growth inhibition of pancreatic tumor cells by modified antisense oligodeoxynucleotides (1998)
    Springer
    Langenbeck's archives of surgery 383 (1998), S. 269-275 
    Details
    ISSN: 1435-2451
    Keywords: Key words Pancreatic cancer ; p53 ; Antisense oligodeoxynucleotides ; Cell culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Introduction: Pancreatic adenocarcinomas are largely resistant to apoptosis. More than 50% of pancreatic tumors reveal mutations in the p53 tumor suppressor gene. Methods: We investigated the growth of pancreatic tumor cells after downregulation of p53 protein expression by antisense oligodeoxynucleotides. Results: Proliferation and p53 expression of PancTu-I cells overexpressing mutant p53 protein were inhibited by antisense oligodeoxynucleotide treatment. When analyzed, two of three other pancreatic tumor cell lines with mutated p53 were also inhibited in their growth. Two of two wild-type (wt) p53 pancreatic tumor cells were not significantly influenced by p53 expression and were, only to a lesser extent, affected in their proliferation. K562 cells (lacking p53 mRNA) and normal human skin fibroblasts used as a target mismatch control showed no changes in proliferation rates with treatment. The different biological effects in the various cells were not caused by differences in the uptake of the oligodeoxynucleotides as monitored by confocal laser-scanning microscopy. Conclusions: Truncation and 5′- and 3′-lipophilic modifications of the oligodeoxynucleotides drastically enhanced the growth inhibition of PancTu-I cells, which were resistant to apoptosis-inducing agents. Furthermore, a higher sequence-specificity of the observed effects was achieved with these compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004230050131
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    Paper (German National Licenses)
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