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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 54 (1990), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The incorporation and redistribution of [1-14C]arachidonic acid in SK-N-BE human neuroblastoma cell phospholipids were investigated. By continuous labelling in serum-enriched medium, a rapid radioactivity incorporation into phosphatidylcholine (PtdCho), phosphatidylinositol, and phosphatidylserine was observed; initially, phosphatidylethanolamine (PtdEtn) was poorly labelled, but at later stages it displayed the highest level of arachidonic acid incorporation, in comparison with other phospholipid classes. Labelling of triacylglycerols was also observed. When cells were pulse-labelled with [1-14C]arachidonic acid and then reincubated in label-free medium, a decrease of the radioactivity in triacylglycerols was observed initially, paralleled by an increase of phospholipid labelling; thereafter, arachidonic acid redistribution was consistent with a net decrease of the radioactivity associated with PtdCho acid-stable forms (i.e., diacyl plus alkylacyl forms), concomitantly with a net labelling increase of both acid-stable PtdEtn and alkenylacyl-PtdEtn. Data indicate the following: (a) neuroblastoma cells incorporate arachidonic acid into phospholipids through complex kinetics involving transfer of the fatty acid from acid-stable PtdCho to both alkenylacyl-PtdEtn and acid-stable PtdEtn; and (b) triacylglycerols act as storage molecules for arachidonic acid which is subsequently incorporated into phospholipids. The possibility that arachidonic acid transfer to PtdEtn subclasses is driven by distinct mechanisms is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism 1045 (1990), S. 213-218 
    ISSN: 0005-2760
    Keywords: (Mouse) ; Arachidonic acid ; Calcium ; Keratinocyte ; Phospholipid
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neurological sciences 11 (1990), S. 471-479 
    ISSN: 1590-3478
    Keywords: Neuropathy ; hereditary motor and sensory neuropathy ; Charcot-Marie-Tooth disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Allo scopo di distinguere chiaramente in sottogruppi i pazienti affetti da HMSN, abbiamo studiato prospeticamente dal punto di vista clinico, genetico ed elettrofisiologico 128 soggetti: 46 casi indice, 39 parenti affetti e 43 sani. La diagnosi di HMSN I o II è state posta in 77 casi. La distinzione tra I e II tipo è risultata impossibile dal punto di vista clinico, ma lo studio delle velocità di conduzione ha dimostrato una chiara divisione in due popolazioni. Il comportamento delle VCM è risultato omogeneo all'interno delle singole famiglie. L'ereditarietà, autosomica dominante in quasi tutti i casi, è risultata probabilmente recessiva in tre soggetti con HMSN I, mentre l'analisi dell'albero genealogico suggerisce una trasmissione X-linked in un'altra famiglia di I tipo. Non abbiamo trovato linkage con il locus Duffy. In queste neuropatie fenotipi simili possono essere determinati da differenti difetti genici. La presenza di un diffuso rallentamento della conduzione nervosa periferica, evidenziata dal confronto tra velocità di conduzione della risposta Fe VCM del nervo ulnare depone per una patogenesi primitivamente mielinica dell'HMSN I.
    Notes: Abstract In an attempt to clearly identify the different HMSN subgroups, we prospectively evaluated 128 subjects (46 index cases, 39 affected and 43 unaffected relatives) on clinical, genetic and electrophysiological grounds. The diagnosis of HMNS I or II was made in 77 patients. Differential diagnosis between type I and II patients was impossible on clinical grounds alone, but nerve conduction study showed a clearcut subdivision into two populations. MCV behavior was consistent within families. Inheritance, autosomal dominant in almost all cases, was probably recessive in three HMSN I subjects and pedigree analysis pointed to X-linked transmission in one HMSN I family. We found no evidence for linkage to Duffy locus. We think that similar HMSN phenotypes can be determined by different gene defects. Ulnar nerve F-conduction velocity did not significantly differ from distal MCV in HMSN I: the evidence of a diffuse slowing of nerve conduction supports the hypothesis of a primary myelin defect.
    Type of Medium: Electronic Resource
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