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  • 1
    Publication Date: 1964-05-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 726-727 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To eliminate the inherent danger of aerosol infection the same strain of the saprophyte M. smegmatis against which Vaichulis3 first demonstrated synergism between penicillin and isoniazid was used. Cells were grown in 'Dubos Tween' broth without glycerol, albumin, or glucose. Standard Warburg ...
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 11 (1959), S. 185-195 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 14 (1961), S. 198-204 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A CDC strain ofTrichophyton rubrum was grown on solid medium and in shake cultures. The resulting forms (mat-like and spheroidal, respectively) were prepared for sectioning and study by the freeze-drying technic. The results indicate certain similarities and differences in growth and pigmentation patterns, depending upon the method of culture. Pigmentation is not random but occurs in specific areas of the fungal clone. The relationship between each form and their pigmentation patterns is briefly described and discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 14 (1961), S. 205-214 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Pigmentation inTrichophyton rubrum appears to be dependent upon tyrosine and phenylalanine (as precursors), carbohydrate (primarily as an energy source), and oxygen. 2. Cysteine and methionine inhibit the growth ofT. rubrum in a minimal medium. L-sorbose also inhibits the growth of this organism, even in a complete medium. 3.T. rubrum apparently synthesizes all of the vitamins required for growth and pigmentation. 4. At certain concentrations of ascorbic acid, it is possible to distinguish between the pigmentogenic and growth processes ofT. rubrum. 5. Sunlight suppresses growth and pigmentation inT. rubrum.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 32 (1967), S. 194-198 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary WhenTrichophyton rubrum is grown in a minimal medium containing glucose, the carbon skeleton of fungal phenylalanine and tyrosine is derived from the glucose carbon. Tracer experiments with variously labeled glucose-C14 indicate that phenylalanine synthesis is linked to glycolysis, but suggest that the pentose phosphate pathway is not involved. These findings suggest that aromatic amino acid biosynthesis may not be linked to the shikimic acid pathway inT. rubrum.
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  • 7
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary From a metabolic point of view, sodium propionate and sodium caprylate in sub-fungistatic concentrations, manifest some interesting effects upon the metabolism, fatty acid synthesis, and pigmentogenesis ofTrichophyton rubrum in its earlier growth phases. Propionate at the higher concentration and caprylate inhibit growth as measured by mycelial dry weight. The higher concentration of propionate suppressed pigment production but a yellow pigment, apparently differing from others previously described, was observed consistently in cultures with the lower concentration of the salt. Caprylate in the concentration tested resulted in a culture in which fatty acid concentration was significantly decreased, however, there appears to be no correlation between fatty acid content depression and mycelial dry weight. Data on fatty acid composition suggest that propionate, an odd-numbered carbon chain fatty acid, diverts synthesis of even-numbered carbon chain fatty acids to the odd-numbered ones.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 44 (1971), S. 159-165 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Jensen, Altschuler &Bard (1957) have surveyed the respiratory enzymes ofTrichophyton mentagrophytes. Enzymes of the hexosediphosphate, hexosemonophosphate, and tricarboxylic acid pathways were found plus a group of miscellaneous enzymes. In view of the close morphological, immunological, and nutritional similarities ofT. mentagrophytes toTrichophyton rubrum, we felt that a study of the enzymology of the latter organism had potential value in forming a basis for the comparison of the two dermatophytes. Our results showed that cell-free extracts ofT. rubrum contain glucokinase, TPN-dependent glucose and fructose dehydrogenases and separate TPN- and DPN-linked glycerol dehydrogenases. These results are in accord with findings of other investigators. ATPase activity was minimal, and shikimic acid kinase, and shikimic and quinic acid dehydrohydrogenases were not detected.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 29 (1966), S. 145-150 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fatty acids ofTrichophyton rubrum found during the logarithmic growth phase and during the early and late stationary phases of growth were separated and identified by gas chromatography. At all three stages of growth, the most abundant fatty acids were palmitic, stearic, octadecenoic and octadecadienoic which, together, accounted for 85–93% of the total fatty acid content. With age, there appears to be a tendency toward chain elongation and desaturation. Analysis of the fatty acid content of a pigmented culture indicated the presence of 8 unsaturated fatty acids which accounted for 65% of the total fatty acids isolated, octadecadienoic acid alone contributing almost 50% to this figure.
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  • 10
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung ObwohlT. rubrum fur exogene shikimicsäure durchlässig ist, fördern weder Shikimicsäure noch Quinicsäure das Wachstum dieses Pilzes im Falle eines Mangels von Phenykalanine oder Tyrosine, noch dienen sie als Substanzen für Pigmentgenese in Medien ohne diese Aminosäuren. Die Atmung des Pilzes ist durch Shikimicoder Quinicsäure unbeeinflußt und der Pilz ist unfähig, beide Substanzen zu benützen, wenn sie zum Kulturmedium hinzugefügt werden. Isotope Verdünnungen mit Shikimicsäure-U-C14 zeigten, daß de novo Shikimicsäure-Synthese nicht erfolgt. Diese Erkenntnis unterstüzt vorherige Befunde, daß Shikimicsäure Richtung der aromatischen Biosynthese in der Biosynthese von Phenylalanine durchT. rubrum nicht begangen wird.
    Notes: Abstract Even thoughTrichophyton rubrum is permeable to exogenous shikimic acid, neither shikimic nor quinic acids stimulate the growth of this fungus in a minimal medium deficient in phenylalanine or tyrosine, nor do they serve as substrates for pigmentogenesis in media lacking these amino acids. The respiration of the dermatophyte is unaffected by shikimic or quinic acids and the fungus does not have the capacity to utilize either compound when it is added to the culture medium. Isotope dilution studies with shikimic acid-U-C14 show that de novo shikimic acid synthesis does not occur. This information supports previous findings that the shikimic acid pathway of aromatic biosynthesis is not involved in the biosynthesis of phenylalanine byTrichophyton rubrum.
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