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  • 11
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Integration of genome-wide expression profiling with linkage analysis is a new approach to identifying genes underlying complex traits. We applied this approach to the regulation of gene expression in the BXH/HXB panel of rat recombinant inbred strains, one of the largest available rodent ...
    Type of Medium: Electronic Resource
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  • 12
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    Unknown
    Oxford : Periodicals Archive Online (PAO)
    Economic Inquiry. 23:4 (1985:Oct.) 703 
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  • 13
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    Unknown
    Berlin, etc. : Periodicals Archive Online (PAO)
    Philologus. 60 (1901) 261 
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  • 14
    ISSN: 1439-099X
    Keywords: Key Words: Locally advanced head and neck cancer ; Neoadjuvant combined radio-chemotherapy ; Prognostic factors ; Hemoglobin concentrations ; Schlüsselwörter: Fortgeschrittene Kopf-Hals-Tumoren ; Kombinierte neoadjuvante Radiochemotherapie ; Prognosefaktoren ; Hämoglobinkonzentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Hintergrund: Hämoglobinkonzentrationen sind in der letzten Zeit, insbesondere bei Patienten mit Kopf-Hals-Tumoren, als Prognosefaktor in den Mittelpunkt des Interesses gerückt. Die meisten klinischen Studien zeigen einen signifikanten Einfluß der Hämoglobinkonzentration auf das Überleben der Patienten unter Radiotherapie. In unserer Studie haben wir den Einfluß des Hämoglobins in einem multimodalen Regime getestet. Patienten und Methoden: 43 Patienten mit fortgeschrittenen Kopf-Hals-Tumoren wurden mit kombinierter Radiochemotherapie behandelt. Die Therapie bestand aus zwei Induktionskursen mit Ifosfamid (1 500 mg/m2, Tag 1 bis 5) und Cisplatin (60 mg/m2, Tag 5), gefolgt von einer hyperfraktioniert akzelerierten Radiatio mit einer Gesamtherddosis von nur 30 Gy. Anschließend erfolgte die radikale Operation mit Neck-Dissection. Ergebnisse: Die Ein- und Zwei-Jahres-Überlebensraten betrugen 79% bzw. 56%, die entsprechenden rezidivfreien Überlebensraten für ein und zwei Jahre 68% und 49%. In unserer Studie waren Tumorgröße (T3 vs. T4, p = 0,0088), Ansprechen auf die Radiochemotherapie am Tumor (histologische Tumorfreiheit vs. Tumorreste, p = 0,045), Ansprechen der Radiochemotherapie im Bereich der Lymphknoten (histologische Tumorfreiheit vs. Tumorreste, p = 0,013) und der Hämoglobinwert nach Radiochemotherapie von prognostischer Bedeutung (Hämoglobin ≥ 11,5 g/dl vs. 〈 11,5 g/dl, p = 0,0084). Schlußfolgerung: In unserer Studie besaß Hämoglobin einen signifikanten prognostischen Einfluß auf das Überleben bei Patienten mit Kopf-Hals-Tumoren, die einer kombinierten Radiochemotherapie unterzogen wurden (univariate Analyse). Des weiteren konnte demonstriert werden, daß die Chemotherapie und eine anschließende Strahlenbehandlung mit geringer Gesamtdosis ähnliche Ergebnisse erbringen im Vergleich zu radikaler Resektion und hochdosierter Radiotherapie. Im Falle eines Rezidivs könnte dem Patienten noch ein voller Kurs reiner Strahlentherapie zugemutet werden.
    Notes: Purpose: Hemoglobin levels are currently the focus of interest as prognostic factors in patients with head and neck cancer. Most published clinical trials have confirmed hemoglobin to possess a significant influence on survival in patients treated with radiotherapy. In our study we have investigated the prognostic value of hemoglobin in a combined modality schedule. Patients and Methods: Forty-three patients with advanced head and neck tumors were treated with combined radio-chemotherapy. The therapy comprised 2 courses of induction chemotherapy with ifosfamide (1,500 mg/m2, day 1 to 5) and cisplatin (60 mg/m2, day 5) followed by hyperfractionated accelerated radiotherapy with a total dose of only 30 Gy. Surgery involved tumor resection and neck dissection. Results: The 1-year overall survival rate and the 2-year survival rate were 79% and 56%, respectively. The 1- and 2-year recurrence-free survival rates were 68% and 49%, respectively. Prognostic factors with an impact on survival were seen in tumor size (T3 vs T4, p = 0.0088), response to radio-chemotherapy at the primary site (no vital tumor rest vs vital tumor rest, p = 0.045), response to lymph node radio-chemotherapy (no vital tumor cells vs vital tumor cells, p = 0.013) and level of hemoglobin after radio-chemotherapy (Hb ≥ 11.5 g/dl vs 〈 11.5 g/dl, p = 0.0084). Conclusion: In our study hemoglobin level after radio-chemotherapy was identified for the first time to be also a significant prognostic factor (univariate analysis) in head and neck cancer patients who underwent combined radio-chemotherapy. Besides chemotherapy plus low-dose irradiation achieved similar results in comparison with radical resection and high-dose radiotherapy at least for the first 2 years after therapy. Relapsing disease could be treated with 1 additional course of radiotherapy which is supposed to be well tolerated.
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  • 15
    ISSN: 1432-2048
    Keywords: Cell cultures ; Chlorophyll protein ; Photosynthesis (light harvesting) ; Poly(A)RNA ; Thylakoid membranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In thylakoid membranes isolated from green plants of parsley, pea, and barley, the light-harvesting chlorophyll a/b protein complex (LHCP, mol. weight: 25,000), is a major constituent. Poly(A)RNA isolated from these species was translated in a wheat germ, cell-free system. The in vitro translation products were treated with antibodies raised against the LHCP. This treatment resulted in the precipitation of a precursor protein (mol. weight: 29,000). Poly(A)RNA was also prepared from a cell culture ofPetroselinum that does not develop chloroplasts upon illumination. This poly(A)RNA is capable of stimulating amino acid incorporation in the in vitro translation system, however, it does not direct the synthesis of LHCP.
    Type of Medium: Electronic Resource
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  • 16
    ISSN: 1432-2048
    Keywords: Cell cultures ; Chlorophyll protein ; Photosynthesis (light harvesting) ; Poly(A)RNA ; Thylakoid membranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In thylakoid membranes isolated from green plants of parsley, pea, and barley, the light-harvesting chlorophyll a/b protein complex (LHCP, mol. weight: 25,000), is a major constituent. Poly(A)RNA isolated from these species was translated in a wheat germ, cell-free system. The in vitro translation products were treated with antibodies raised against the LHCP. This treatment resulted in the precipitation of a precursor protein (mol. weight: 29,000). Poly(A)RNA was also prepared from a cell culture ofPetroselinum that does not develop chloroplasts upon illumination. This poly(A)RNA is capable of stimulating amino acid incorporation in the in vitro translation system, however, it does not direct the synthesis of LHCP.
    Type of Medium: Electronic Resource
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  • 17
    ISSN: 1432-2048
    Keywords: Chlorophyll protein ; Hordeum ; Photosynthesis (light harvesting) ; Poly(A)RNA ; Polysomes ; Thylakoid membranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Polysomes from dark-grown and illuminated barley seedlings were translated in cell-free systems. The translation products reacting with the antibody against the light-harvesting chlorophyll a/b protein (LHCP) were analyzed by polyacrylamide gel electrophoresis. It was found that, in addition to the precursor protein of LHCP, a product was obtained that co-migrated with the mature protein. Furthermore, the results show that the light-induced proly(A)RNA for LHCP is integrated into the polysomal complex without delay, indicating that the integration of LHCP into the membrane is controlled at a higher level of gene expression.
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1432-1327
    Keywords: Key words Dinuclear iron complexes ; Non-heme iron complexes ; Mössbauer spectroscopy ; Mixed-valent iron complexes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract  The asymmetrically coordinated complex [{L(Ph2acac)FeIII}(μ-O){FeIII(Cl4-cat)L}](BPh4)·1.5toluene has been synthesized and structurally characterized (Ph2acac–=1,3-diphenylpropane-1,3-dionate, Cl4-cat2–=tetrachlorocatecholate, L=1,4,7-trimethyl-1,4,7-triazacyclononane). This species can be electrochemically oxidized and reduced by one electron, respectively, yielding two species which both have an S=1/2 ground state. It is shown that the oxidation is ligand-centered, affording a coordinated semiquinonate(1–) ligand with S=1/2 which is antiferromagnetically coupled to a high-spin FeIII ion (S=5/2) yielding an S=2 state which, in turn, is antiferromagnetically coupled (through the oxo bridge) to the second high-spin FeIII ion (S=5/2) yielding the observed S=1/2 ground state. In contrast, the reduction is metal-centered generating a mixed-valent species with an [FeIII-O-FeII]3+ core; intramolecular antiferromagnetic coupling again produces an S=1/2 ground state. The symmetrical complex [{LFeIII(Ph2acac)}2(μ-O)](ClO4)2 has also been synthesized, as have the mononuclear species [LFeII(Ph2acac)Cl] and [LFeIII(aacac)Cl](ClO4)·1 mesitylene [aacac–=3-(9-anthryl)acetylacetonate(1–)], all of which have been characterized by X-ray crystallography. The magnetism, the Mössbauer-, EPR-, and UV-VIS-spectra and the electrochemistry of complexes are reported.
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 27 (1981), S. 724-730 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 422 (1993), S. 418-423 
    ISSN: 1432-2013
    Keywords: Neurodegeneration ; Plasticity ; Dendritic spines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We have developed an in vitro model of chronic epilepsy in order to study the consequences of prolonged periods of epileptic activity. After applying the convulsants bicuculline and/or picrotoxin to mature rat hippocampal slice cultures for 3 days, large numbers of swollen and vacuolated cells were observed throughout all hippocampal subfields. The number of dendritic spines of pyramidal cells was massively reduced. These changes were similar to those observed previously in post-mortem studies of hippocampal tissue from human epilepsy patients. Intracellular recordings from CA3 pyramidal cells revealed that spontaneous synaptic activity was greatly reduced in treated cultures. γ-Aminobutyric acid-mediated inhibition was apparently not affected by sustained convulsant activity, although synaptic excitation was markedly depressed. Acute re-application of bicuculline to treated cultures elicited, upon stimulation of the mossy fibre tract, a typical interictal burst lasting several hundred milliseconds, with a wave form similar to those occurring in untreated cultures, but of a shorter duration. In contrast, ictal bursts (lasting tens of seconds), which always occur spontaneously in control cultures during initial perfusion of bicuculline, were not observed in treated cultures. These pathological changes were reversible when treated cultures were returned to normal medium for 1 week. The surviving cells had a healthy morphology and a normal complement of dendritic spines. Spontaneous synaptic activity was normal, and ictal bursts occurred spontaneously upon perfusion of bicuculline. The findings suggest that the morphological and functional changes are a consequence, rather than a direct cause of epilepsy.
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