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  • 1
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 352-354 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Under IR light a piece of retina from a dark-adapted toad (Bufo marinus) was finely chopped in Ringer's solution, yielding some isolated rods with intact outer and inner segments. The light-sensitive current from one of these rods was recorded by sucking its inner segment into a close-fitting glass ...
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 317 (1985), S. 252-255 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Membrane current was recorded in darkness from a toad rod outer segment, either isolated or still attached to an inner segment, by drawing it partially into a suction pipette containing Ringer's solution12. The inner segment and the basal portion of the outer segment outside the pipette were then ...
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 313 (1985), S. 579-582 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Figure 1A shows the responses of a toad (Bufo marinus) rod to flashes (traces a,c) and steps (traces b,d) of light. All responses were saturated, but the flash in c and the light step in d were 60-110 times brighter than the corresponding ones in a and b. A striking feature is that all the ...
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 311 (1984), S. 661-663 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] We recorded the Na-Ca exchange current from an isolated, dark-adapted rod after its outer segment was loaded with Ca2+ (Fig. 1). Ca2+ loading was readily achieved as the light-sensitive conductance was highly permeable to divalent cations, especially after initial exposure to a Na solution ...
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    ISSN: 1573-7373
    Schlagwort(e): glioblastoma multiforme ; external beam-radiotherapy ; CDDP ; intraoperative radiotherapy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract This trial tested the assumed efficacy and safety of externalbeam-radiotherapy combined with daily administration of low dose cisplatin(CDDP) (ERCLC therapy) for patients with glioblastoma multiforme (GBM).Thirty adult patients with supratentorial GBM received daily postoperativetreatment with low dose intravenous CDDP (4–6 mg/m2) administered30 minutes before external irradiation. In 10 patients, intraoperativeradiotherapy (IORT) following surgery was given prior to ERCLC therapy.Tumor response on MRI, interval to tumor progression, survival, andtoxicities were analyzed. None of the patients showed a tumor response toERCLC therapy. Overall, the median time to tumor progression was 6 monthswith a 1-year tumor progression-free rate of 26.7% and a 2-year rateof 0%. The median survival time was 15 months with a 1-year survivalrate of 69.9% and a 2-year rate of 31.5%. The survival rate ofpatients with IORT was better than that of those without IORT, however,there was no significant difference. Anorexia associated with nauseaoccurred in 70% and general fatigue in 10.0%. Leukopenia andthrombocytopenia occurred in 26.7% and 33.3%, respectively.However, none of the patients had to be withdrawn from therapy due to thesetoxicities. Other toxicities were not observed. This clinical study showedthat daily administration of low dose CDDP did not enhance tumor response toirradiation for GBM on MRI. Regarding toxicity, however, ERCLC therapy waswell tolerated. Although this trial did not provide sufficient data todetermine whether ERCLC therapy was effective for GBM due to the smallnumber of patients, additional clinical trials of this therapy may bewarranted because that the survival rate in this study was equal to thebetter results recently reported for newly diagnosed GBM.
    Materialart: Digitale Medien
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  • 6
    ISSN: 1573-7373
    Schlagwort(e): DCC ; glioma ; RT-PCR ; recurrent tumor ; survival rate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Deleted in colorectal carcinoma (DCC) gene has been as a candidate of tumor suppressor genes, has been identified recently and is thought to relate to the metastatic potential in some cancers. We examined the gene in 60 human gliomas (26 glioblastomas multiforme (GBMs), 16 anaplastic astrocytomas (AAs), 6 low grade astrocytomas (LGAs) of WHO Grade II, and 11 recurrent gliomas) and A172 human GBM cell line by reverse transcription polymerase chain reaction (RT-PCR). Twenty (77%) GBMs, 11 (69%) AAs, and 1 (17%) LGA revealed the reduced or absent DCC expression. Reduced DCC expression was also shown in 10 (91%) recurrent gliomas. Furthermore, in 5 cases with both primary and recurrent GBM, the DCC expressions of all recurrent tumors were lower than those of primary tumors. No significant correlation between DCC expression and Mib-1 labeling index was confirmed. The survival rate of patients without reduced DCC expression was significantly superior to that of patients with reduced DCC expression in overall malignant astrocytic tumors. In GBM and AA separately, DCC expression also tended to correlate with patient's prognosis. These results suggest that reduced DCC expression is an important marker in tumor malignancy and recurrence in astrocytic tumors and that may be a useful prognostic factor in patients with malignant astrocytic tumors.
    Materialart: Digitale Medien
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  • 7
    ISSN: 1861-387X
    Schlagwort(e): mRNA fingerprinting ; Polymerase chain reaction ; Gene expression ; Glial cell differentiation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract To identify differentially expressed genes involved in rat C6 glioma cell differentiation induced by cyclic AMP, we adopted mRNA fingerprinting using arbitrarily primed polymerase chain reaction (PCR) (RAP). Four complementary DNA (cDNA) fragments differentially expressed during differentiation were isolated, and they appeared to contain coding regions of corresponding mRNAs. RAP can be used to efficiently identify cDNA fragments by comparing nucleotide and deduced amino acid sequences with those in databases, and is thus a useful method to search for and identify important genes involved in complex cellular processes such as glioma cell differentiation.
    Materialart: Digitale Medien
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