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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 41 (1998), S. 619-623 
    ISSN: 1530-0358
    Keywords: Cytomegalovirus ; Enteritis ; Transplant ; Human immunodeficiency virus ; Immunosuppression ; Mortality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Cytomegalovirus infection causing symptomatic enteritis is most usually associated with immunosuppressed transplant patients or patients positive for human immunodeficiency virus. Most reports studying this illness are small and do not clearly define the risk factors or mortality rates. METHODS: The present study retrospectively reviewed the charts of 67 patients with biopsy-proven cytomegalovirus enteritis (esophageal, gastric, small bowel, and colonic) to define and to investigate factors that influence survival. Patients were classified into four groups based on underlying medical condition: 1) patients positive for human immunodeficiency virus; 2) transplant patients receiving immunosuppressive medications; 3) immunosuppressed nontransplant patients; and 4) otherwise healthy individuals. Mortality rates based on underlying medical condition, location of intestinal cytomegalovirus infection, cytomegalovirus therapy, age, and average days to institution of treatment were defined and statistically assessed. RESULTS: Mortality was significantly greater in the normal patient group (80 percent) than in the transplant (21 percent), other immunosuppressed (44 percent), or human immunodeficiency virus-positive (75 percent) groups (P=0.0006, Cochran-Mantel-Haenszel statistics). There was no difference in mortality based on intestinal location of disease or treatment modality (surgery, medical therapy, or both). Cohorts of patients older than 65 years had a statistically higher mortality ratevs. those younger than 65 years old (68vs. 38 percent;P=0.05, Cochran-Mantel-Haenszel statistics). Statistically increased mortality was also associated with increased time from hospital admission to institution of cytomegalovirus treatment, whether therapy was medication alone or medication and surgery (P 〈 0.05, exact Wilcoxon's test). CONCLUSIONS: 1) Lethal cytomegalovirus enteritis can arise in patient populations not typically identified as being at risk for this disorder, including normal individuals. 2) Mortality in cytomegalovirus enteritis is adversely associated with age older than 65 years and increased time to institution of therapy but is not affected by anatomic site of infection or particular form of treatment. Paradoxically, in this study, normal patients had the highest mortality, which we attribute to a low index of suspicion and relatively late institution of therapy.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1530-0358
    Keywords: Graft-versus-host disease ; Small-bowel transplantation ; Lymphocyte function associated antigen-1 ; Intestinal inflammation ; Monoclonal antibody therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We previously showed that intestinal tissue expression of lymphocyte function associated antigen-1 is increased in animals with graft-versus-host disease after small-bowel transplantation. HYPOTHESIS: Treatment of rats with monoclonal antibody to lymphocyte function associated antigen-1 after small-bowel transplantation will lessen the severity of graft-versus-host disease. METHODS: Graft-versus-host disease was created in Lewis X Brown-Norway F1 rats by heterotopic vascularized small-bowel transplantation from Lewis donors. Transplanted rats were treated with either saline or various regimens of monoclonal antibody to lymphocyte function associated antigen-1. Clinical characteristics, weight loss, spleen index, white blood cell counts, native intestinal histology, bowel permeability, and survival were then compared between groups and appropriate sham-operated and lymphocyte function associated antigen-1-treated controls. RESULTS: Lymphocyte function associated antigen-1-treated rats lost less weight, had larger spleen indexes, more normal white blood cell counts, more normal native intestinal histology, less alteration in bowel permeability, and longer survival than untreated small-bowel transplantation rats. CONCLUSIONS: In this model of graft-versushost disease after small-bowel transplantation, monoclonal antibody to lymphocyte function associated antigen-1 treatment decreased the severity of graft-versus-host disease and prolonged rat survival.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 41 (1998), S. 687-690 
    ISSN: 1530-0358
    Keywords: Bowel permeability ; Crohn's disease ; Ileocolectomy ; Intestine ; Lactulose/rhamnose ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Numerous investigators have shown increased bowel permeability in patients with Crohn's disease. It is unclear whether this is a precondition affecting the entire intestine or a consequence of the inflammation and, therefore, only affecting the diseased bowel. The present study tested the hypothesis that resection of diseased bowel in patients with ileocolonic Crohn's disease would correct abnormalities in bowel permeability. METHODS: Ten patients (5 females; mean age, 33±2 years) with ileocolonic Crohn's disease who underwent elective ileocolic resections had bowel permeability measured preoperatively and postoperatively by the relative urinary clearance of orally consumed lactulose and rhamnose. RESULTS: Mean preoperative bowel permeability in patients with Crohn's disease was significantly elevated relative to healthy volunteers (0.172±0.04vs. 0.046±0.01;P〈0.05, unpairedt-test). After ileocolectomy, bowel permeability decreased in patients with Crohn's disease and reached a normal range by postoperative day 30. CONCLUSIONS: Bowel permeability is increased in patients with ileocolic Crohn's disease because of the presence of diseased bowel and decreases to a normal range in these patients after resection of gross intestinal disease. This suggests that bowel permeability may be a quantitative and clinically effective method with which to assess the presence and severity of diseased bowel in patients with Crohn's disease.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-2568
    Keywords: GRAFT-VERSUS-HOST DISEASE ; SMALL BOWEL TRANSPLANTATION ; LYMPHOCYTE FUNCTION ASSOCIATED ANTIGEN-1 ; INTESTINAL INFLAMMATION
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Experimental graft-versus-host disease (GVHD)causes immune-mediated intestinal injury. The adhesionmolecule lymphocyte function associated antigen-1(LFA-1) is involved in leukocyte homing to areas of inflammatory injury. Our hypothesis was thatLFA-1 is increased in the GVHD injured small bowel andcolon. We found that animals with GVHD caused byauxiliary small bowel transplantation displayedsignificantly increased expression of intestinal LFA-1αat times of clinical illness when compared to controls.The staining pattern progressed from a few discretelystained cells in the lamina propria on day 5 to diffuse confluent staining of lamina propria onday 13 and was statistically significantly increasedfrom controls at days 10 and 13. CyA-treated animals hadintermediate staining between control and day 13 GVHD animals. There was no differencebetween sham-operated control animals and SBTx animalswith GVHD in the amount of staining for LFA-1 inextraintestinal organs normally affected by GVHD. Weconclude that: (1) LFA-1 expression in the small boweland colon progressively increased during GVHD afterSBTx; and (2) CyA treatment is associated with decreasedLFA-1 expression in the small bowel and colon of GVHD animals after SBTx. LFA-1 may play animportant role in immune-mediated injury of theintestine.
    Type of Medium: Electronic Resource
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