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  • 1
    ISSN: 1438-2199
    Schlagwort(e): Keywords: Amino acids ; Kainic acid ; Neurodegeneration ; Excitotoxicity ; Poly(ADP-ribose) polymerase ; PARP ; In vivo
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary. Poly(ADP-ribose) polymerase (PARP) is activated in glutamate-induced toxicity of neurons in culture (Cosi et al., 1994). Since injection of the excitatory amino acid, kainic acid (KA) into the rat striatum induces a delayed neuronal death, the effects of this in vivo excitotoxin lesioning procedure on striatal PARP activity was investigated. PARP activity was measured in striatal extracts both in the absence ("endogenous" activity) and presence ("total" activity) of exogenously-added fragmented DNA. KA (5 nmols/1 μl) produced significant and time-dependent changes in striatal PARP activity, compared to saline-injected control animals: no changes at 6 h after intrastriatal KA, a 68% and 48% decrease in endogenous and total PARP activity respectively at 12 h, a doubling in endogenous PARP activity at 24 h, and a 382% and 60% increase in endogenous and total activities at 1 week after KA. PARP cleavage was not detected at any time point. These results suggest a participation of PARP in KA-induced toxicity in the brain in vivo.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1573-675X
    Schlagwort(e): Anti-Fas antibody ; antisense homology box-derived peptide ; apoptosis ; Fas ligand ; ovarian cancer.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract We found that a short synthetic peptide corresponding to the “antisense homology box” of Fas ligand induced apoptotic cell death of Fas-expressing human ovarian cancer cell lines. The peptide was deduced from residues 256–265 of human Fas ligand, based on the hypothesis that it should contain a specific binding site to the corresponding Fas. Interestingly, the ovarian cancer cell line NOS4, which was sensitive to anti-Fas antibody induced apoptosis, was not affected by the peptide, whereas another cell line, SKOV-3, which was insensitive to anti-Fas antibody, was killed by the peptide. Thus, this short peptide was shown to have a unique activity to induce apoptosis in human ovarian cancer cells in a manner different from anti-Fas antibody.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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