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  • 1975-1979  (1)
  • 1965-1969  (2)
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  • 1
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Autoren berichtenüber die Ergebnisse von In-vitro-Untersuchungen über die Höhe der Porphobilinogen- und der Porphyrinsynthese in menschlichen Erythrozyten mit Eisenmangel. Es zeigte sich, 1. daß die Synthese von Porphobilinogen aus δ-Aminolacvulinsäure praktisch normal ist; 2. daß in Erythrozyten mit Eisenmangel die Aminolaevulinsäure dem gleichen Stoffwechselweg folgt wie in normalen roten Blutkörperchen; 3. daß die Synthese von Porphyrin aus Porphobilinogen zum Teil gehemmt und die Menge des gebildeten Porphyrins erheblich verringert ist; 4. daß die Gabe von Eisen die Höbe der Porphyrinsynthese aus Porphobilinogen normalisiert ohne die Synthese diese Pyrolls zu stören.
    Notes: Summary The results ofin vitro studies on the rate of porphobilinogen and porphyrin synthesis in iron deficient human red blood cells are reported. It was found: 1. that the synthesis of porphobilinogen from δ-aminolaevulic acid is virtually normal; 2. that in iron deficient red blood cells δ-aminolaevulic acid follows the same metabolic paths as in normal red blood cells; 3. that the synthesis of porphyrin from porphobilinogen is partly inhibited, the amount of porphyrin formed being appreciably decreased; 4. that the administration of iron normalises the rate of porphyrin synthesis from porphobilinogen without interfering with the synthesis of this pyrrole.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 16 (1968), S. 333-341 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Ergebnisse von Untersuchungen zur Feststellung, ob die Höhe der Protoporphyrinsynthese aus δ-Aminolävulinsäure bei Eisenmangelanämie geringer ist und ob Eisen für die Synthese von Zwischenprodukten im Porphyrinstoffwechsel wesentlich ist, werden berichtet. Durch das Messen von δ-Aminolävulinsäure im Harn, Porphobilinogen-, Koproporphyrin- und Uroporphyrinausscheidung im Harn und die fäkale Ausscheidung von Koproporphyrin und Protoporphyrin wurde ein Absinken der Höhe der Porphyrinsynthese bei Fällen von idiopathischer hypochromer Anämie nachgewiesen. Der relative Anstieg in der Porphobilinogenausscheidung im Harn deutet auf eine Teilblockierung der Porphyrinsynthese von Porphobilinogen. Eisenbehandlung normalisiert den Porphyrinstoffwechsel.
    Notes: Summary The results of studies done to ascertain whether the rate of protoporphyrin synthesis from δ-aminolaevulic acid is decreased in iron deficiency anaemia and whether iron is essential for the synthesis of the intermediate compounds in the porphyrin metabolism are reported. By measuring the urinary δ-amino-laevulic acid, porphobilinogen, coproporphyrin and uroporphyrin excretion and the faecal coproporphyrin and protoporphyrin excretion a decrease in the rate of porphyrin synthesis was demonstrated in cases of idiopathic hypochromic anaemia. The relative increase in the urinary porphobilinogen excretion points to a partial block of porphyrin synthesis from porphobilinogen. Iron treatment normalises the porphyrin metabolism.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new type of hemoglobin F, in which isoleucine in position 75 (E 19) of the γ chain is replaced by a threonine residue, has been found in 29 out of 32 homozygotes for β thalassemia. The amount of this hemoglobin ranges from traces to 40% of the total Hb F. The same γ75 Thr chain is also present in the Hb F of 40% of normal newborns and premature infants examined, of one 14-week-old fetus and in one out of 3 patients with aplastic anemia and raised levels of Hb F. Our results strongly suggest that the synthesis of this new chain is under the control of a γ gene nonallelic with those coding for Aγ and Gγ chains.
    Type of Medium: Electronic Resource
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