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  • Articles: DFG German National Licenses  (2)
  • Protein-protein interactions  (1)
  • Technetium-99m hexamethylpropylene amine oxime labelled leucocytes  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 1
    ISSN: 1619-7089
    Keywords: Inflammatory bowel disease ; Seronegative spondylarthropathies ; Technetium-99m hexamethylpropylene amine oxime labelled leucocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Abdominal scintigraphy with technetium-99m hexamethylpropylene amine oxime (99mTc-HMPAO)-labelled leucocytes is an excellent tool for evaluating disease extent and activity of intestinal lesions in patients with inflammatory bowel disease (IBD). In some cases of seronegative spondylarthropathies (SSp), IBD may remain subclinical. The aim of this study was to evaluate the presence of positive abdominal scintigraphy in patients with SSp and without clinical symptoms or signs of IBD. To this end we studied 32 patients with active SSp (European Spondylarthropathy Study Group 1991 criteria) without clinical evidence of IBD (eight had ankylosing spondylitis, four psoriatic arthritis, three reactive arthritis an 17 undifferentiated SSp) and 11 controls without SSp. All SSp and control patients received similar doses of non-steroidal anti-inflammatory drugs (NSAIDs). Abdominal scintigraphic images were obtained at 30 and 120 min after re-injection of99mTc-HMPAO-labelled leucocytes. The99mTc-HMPAO-labelled leucocyte scan was positive in 17 patients with SSp (53.1%) (six with ankylosing spondylitis, three with psoriatic arthritis, two with reactive arthritis and six with undifferentiated SSp). Fourteen patients scored from 2 to 4 on the intensity of uptake scale. The colon and terminal ileum were predominantly involved. Axial involvement was more frequent in patients with a positive scan than in patients with negative results (P〈0.05) (64.7% vs 26.6%; odds ratio: 5). No control patient showed a positive scan. It is concluded that99mTc-HMPAO-labelled leucocyte scan shows increased uptake among patients with SSp without evidence of IBD. These findings provide new evidence linking SSp with intestinal inflammation and suggest that in some cases a bowel-related process could contribute to the development of SSp. Longterm follow-up studies with more patients are necessary to evaluate the diagnostic and therapeutic implications of these results.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1617-4623
    Keywords: Drosophila ; Enhancer of split ; achaete-scute ; Helix-loop-helix proteins ; Protein-protein interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract TheEnhancer of split andachaete-scute gene complexes [E(spl)-C and AS-C] encode helix-loop-helix proteins required for neurogenesis inDrosophila. Using a heterologous bacterial system, we show that (i) the bHLH domains of the proteins encoded by the two gene complexes differ in their ability to form homo- and/or heterodimers; (ii) the bHLH domains of the E(spl)-C proteins m5, m7 and m8 interact with the bHLH domains of the Ac and Sc proteins. These bHLH domains form an interaction network which may represent the molecular mechanism whereby the competent state of the proneural cells is maintained until the terminal determination to neuroblast occurs. Also, the pattern of interactions of the bHLH domains of certain proteins encoded by the two gene complexes may explain their functional redundancy.
    Type of Medium: Electronic Resource
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