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  • 1
    Electronic Resource
    Electronic Resource
    Shoot P status regulates cluster-root growth and citrate exudation in Lupinus albus grown with a divided root system (2003)
    Oxford, UK : Blackwell Science, Ltd
    Plant, cell & environment 26 (2003), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The present study was carried out to investigate whether the P concentration in the roots or the shoots controls the growth and citrate exudation of cluster roots in white lupin (Lupinus albus L). Foliar P application indicated that low P concentration in the shoots enhanced cluster-root growth and citrate-exudation rate more so than low P concentration in the roots. In the split-root study, the P concentration in the shoots increased with increased P supply (1, 25 or 75 mmol m−3 P), to the ‘privileged’ root halves. Roots ‘deprived’ of P invariably had the same low P concentrations, whereas those in the ‘privileged’ roots increased with increasing P supply (1, 25 or 75 mmol m−3 P). Nevertheless, the proportion of the total root mass allocated to cluster roots, and the citrate-exudation rates from the root halves were always similar on both root halves, irrespective of P supply, and decreased with increasing shoot P concentrations. Peak citrate exudation rates from developing cluster roots were significantly faster from cluster roots on the ‘deprived’ root halves when the ‘privileged’ half was exposed to 1 mmol m−3 P as compared with 25 or 75 mmol m−3 P. The possibility that changes in the concentrations of P fractions in the root halves influenced cluster-root growth and citrate exudation was discounted, because there were no significant differences in insoluble organic P, ester-P and inorganic P among all ‘deprived’ root halves. The results indicate that cluster-root proportions and citrate exudation rates were regulated systemically by the P status of the shoot, and that P concentrations in the roots had little influence on growth and citrate exudation of cluster roots in L. albus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.2003.00957.x
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  • 2
    Electronic Resource
    Electronic Resource
    Interpretation of ileal biopsies: morphological features in normal and diseased mucosa (2001)
    Oxford, UK : Blackwell Science Ltd
    Histopathology 38 (2001), S. 0 
    Details
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: One of the advantages of flexible colonoscopy is that the terminal ileum can easily be reached and biopsied by an experienced operator. Thus, the pathologist will, with increasing frequency, receive ileal biopsies from patients who have or may not have ileal disease and it is therefore useful to have a good knowledge of the spectrum of ileal mucosal histology and pathology, of its normal function, and of the changes seen in different conditions. It is also desirable to be aware of diseases that occur less frequently.The ileal microscopic features are related to its absorptive function on the one hand, and to non-specific and specific defence mechanisms of the organism against potential hazardous components on the other. As a consequence the mucosa features a constant physiological and controlled inflammatory process. Part of the ileal mucosal structure is determined by the presence of the gut-associated lymphoid tissue (GALT) which plays a key role in discriminating harmless nutrients and harmful pathogens.It will be important to distinguish this normal situation from alterations seen in infectious or inflammatory pathology. Further, because of the therapeutic implications, it is necessary that acute and chronic (idiopathic) inflammation are recognized. This will in general be possible by evaluating the composition of the inflammatory infiltrate and the occurrence of epithelial and mucosal architectural changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2559.2001.01070.x
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  • 3
    Electronic Resource
    Electronic Resource
    Joint involvement in inflammatory bowel disease (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 20 (2004), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Peripheral involvement of the joints, including pauciarticular, asymmetrical, transitory and migrating synovitis and enthesiopathy, is observed in 10–20% of affected inflammatory bowel disease patients. Recurrence is common and frequently coincides with a flare-up of intestinal disease. The true prevalence of axial involvement is less well established. Sacroiliitis is a hallmark of spondylitis, but is under-reported due to its insidious onset and sometimes asymptomatic nature. Radiographic evidence of sacroiliitis is present in about 20–25% of patients. Ankylosing spondylitis, as defined by the Rome criteria, is present in 3–10% of inflammatory bowel disease patients, and is thought to have a different genetic predisposition in these patients compared with ‘classic’ ankylosing spondylitis: whereas the human leucocyte antigen B27 phenotype is present in 90% of patients with ‘classic’ ankylosing spondylitis, the prevalence decreases to only 30% in patients with ankylosing spondylitis secondary to Crohn's disease. Polymorphisms involving CARD15 appear to be a possible genetic trigger: 78% of patients with Crohn's disease and symptomatic or asymptomatic sacroiliitis carry at least one mutation, compared with only 48% of control Crohn's disease patients. Moreover, in other forms of spondyloarthropathy, a similar association has been reported: 42% of patients with spondyloarthropathy and associated asymptomatic chronic gut inflammation, who are considered likely to develop Crohn's disease and ankylosing spondylitis, are carriers of at least one CARD15 mutation, compared with only 7% of patients with normal histology. In addition to genetic markers, clinical features support the relationship between gut and joint pathophysiology. In cases of spondyloarthropathy, a very rapid, substantial and sustained improvement in symptoms has been reported following treatment with infliximab, suggesting an essential role for tumour necrosis factor-α in spondyloarthropathy, similar to that observed in Crohn's disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2004.02044.x
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  • 4
    Electronic Resource
    Electronic Resource
    Rapid improvement of bone metabolism after infliximab treatment in Crohn's disease (2004)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 20 (2004), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : Crohn's disease is associated with low bone mineral density and altered bone metabolism.Aim : To assess the evolution of bone metabolism in Crohn's disease patients treated with infliximab.Methods : We studied 71 Crohn's disease patients treated for the first time with infliximab for refractory Crohn's disease. Biochemical markers of bone formation (type-I procollagen N-terminal propeptide, bone-specific alkaline phosphatase, osteocalcin) and of bone resorption (C-telopeptide of type-I collagen) were measured in the serum before and 8 weeks after infliximab therapy and compared with values in a matched healthy control group.Results : Eight weeks after treatment with infliximab, a normalization of bone markers was observed with a median increase in formation markers of 14–51% according to marker and a lower but significant decrease in resorption marker (median 11%). A clinically relevant increase in bone formation markers was present in 30–61% of patients according to the marker. A clinically relevant decrease in C-telopeptide of type-I collagen was present in 38% of patients. No association was found with any tested demographic or clinical parameter.Conclusion : Infliximab therapy in Crohn's disease may rapidly influence bone metabolism by acting either on bone formation or bone resorption. This improvement seems to be independent of clinical response to infliximab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2004.02152.x
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  • 5
    Electronic Resource
    Electronic Resource
    Association between polymorphism in IgG Fc receptor IIIa coding gene and biological response to infliximab in Crohn's disease (2004)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 19 (2004), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aim : To test the hypothesis of an association between polymorphism in FCGR3A (the gene coding for FcγRIIIa, which is expressed on macrophages and natural killer cells, is involved in antibody-dependent cell-mediated cytotoxicity and has recently been associated with a positive response to rituximab, a recombinant immunoglobulin G1 antibody used in non-Hodgkin's lymphomas) and response to infliximab in Crohn's disease.Methods : FCGR3A-158 polymorphism was determined using an allele-specific polymerase chain reaction assay in 200 Crohn's disease patients who had received infliximab for either refractory luminal (n = 142) or fistulizing (n = 58) Crohn's disease. Clinical and biological responses (according to C-reactive protein levels) were assessed in 200 and 145 patients, respectively.Results : There were 82.9% clinical responders in V/V patients vs. 72.7% in V/F and F/F patients (N.S.). Globally, the decrease in C-reactive protein was significantly higher in V/V patients than in F carriers (P = 0.0078). A biological response was observed in 100% of V/V patients, compared with 69.8% of F carriers (P = 0.0002; relative risk, 1.43; 95% confidence interval, 1.27–1.61). In the sub-group of patients with elevated C-reactive protein before treatment, the multivariate analysis selected the use of immunosuppressive drugs and FCGR3A genotype as independent factors influencing the clinical response to infliximab (P = 0.003).Conclusion : Crohn's disease patients with FCGR3A-158 V/V genotype have a better biological and, possibly, clinical response to infliximab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2004.01871.x
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  • 6
    Electronic Resource
    Electronic Resource
    Non-transferrin-bound iron in untreated and ribavirin-treated chronic hepatitis C patients (2002)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 16 (2002), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : In patients with chronic hepatitis C, elevations in serum iron levels, hepatic iron content and oxidative stress-related molecules have been reported. Treatment with ribavirin induces an increase in hepatic iron concentration. In situations of iron overload, non-transferrin-bound iron can appear. Therefore, we determined non-transferrin-bound iron levels in untreated chronic hepatitis C patients and in patients during interferon–ribavirin treatment.Materials and methods : In 10 untreated and 19 interferon–ribavirin-treated chronic hepatitis C patients, we examined non-transferrin-bound iron levels by a colorimetric method using nitrilotriacetic acid as a ligand and sodium triscarbonatecobalt(iii) to block free iron binding sites on transferrin.Results : Despite the presence of high serum iron saturation and ferritin levels, non-transferrin-bound iron was absent in the majority of hepatitis C virus patients (25/29, 86%). There was no difference in non-transferrin-bound iron levels between untreated and treated patients. Four patients with high non-transferrin-bound iron levels were distinguished by higher serum iron levels. In two of these patients, hepatocytic iron was present on liver biopsy.Conclusions : In the majority of chronic hepatitis C patients, non-transferrin-bound iron levels are normal. Treatment with ribavirin does not induce high non-transferrin-bound iron levels. Non-transferrin-bound iron levels are only higher than normal in hepatitis C patients with higher serum iron levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2002.01316.x
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  • 7
    Electronic Resource
    Electronic Resource
    Lymphoepithelial interactions in human terminal ileum and colon : Electron-microscopic findings in normal and inflamed mucosa
    Amsterdam : Elsevier
    Micron And Microscopica Acta 20 (1989), S. 121-123 
    Details
    ISSN: 0739-6260
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0739-6260(89)90026-9
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  • 8
    Electronic Resource
    Electronic Resource
    High-performance liquid chromatographic assay for the determination of 5-aminosalicylic acid and acetyl-5-aminosalicylic acid concentrations in endoscopic intestinal biopsy in humans
    Amsterdam : Elsevier
    Journal of Chromatography B: Biomedical Sciences and Applications 564 (1991), S. 296-302 
    Details
    ISSN: 0378-4347
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-4347(91)80094-S
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  • 9
    Electronic Resource
    Electronic Resource
    Opportunities for immune modulation in the spondyloarthropathies with special reference to gut inflammation (2000)
    Springer
    Inflammation research 49 (2000), S. 47-54 
    Details
    ISSN: 1420-908X
    Keywords: Key words: Spondyloarthropathy — Reactive arthritis — Immune modulation — Crohn's disease — Inflammatory bowel disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The spondyloarthropathies (SpA) are a related group of disorders, characterized primarily by spondylitis, pauci-articular arthritis and enthesitis. The presence of subclinical gut inflammation in patients with SpA ranges from 25 to 75%, depending upon the type of SpA. Several data suggest that the association between gut inflammation and synovitis reflects an etiopathogenetic relationship, and that strategies which interfere with the gut inflammation may also modulate the synovitis. Here we review some standard as well as experimental drugs used in the treatment of patients with inflammatory bowel disease and discuss what is known about their effect on SpA-related locomotor manifestations. For the more experimental drugs, such as cytokines, anti-cytokines and anti-adhesion compounds, clinical trials in patients with SpA are still very scarce.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000110050558
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  • 10
    Electronic Resource
    Electronic Resource
    Jejunal arteriovenous malformation, diagnosed by angiography and treated by embolization and catheter-guided surgery: case report and review of literature (1998)
    Springer
    Abdominal imaging 23 (1998), S. 127-131 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Gastrointestinal hemorrhage—Arteriovenous malformation—Jejunum—Embolization—Surgery.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. A case of chronic gastrointestinal hemorrhage caused by a small jejunal arteriovenous malformation (AVM) is reported. Treatment by endovascular embolization was temporarily successful. Subsequently, the patient underwent laparoscopic resection, guided by intraoperative catheter localization with methylene blue. Histopathology confirmed a true AVM. Eighteen months after treatment, the patient is free of symptoms. Literature of jejunal AVMs is reviewed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900303
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