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  • 1
    ISSN: 1432-2277
    Keywords: Key words Renal transplantation ; chronic rejection ; dietary protein restriction ; Dietary protein restriction ; chronic rejection ; renal transplantation ; Chronic rejection ; dietary protein restriction ; renal transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Non-allogeneic factors such as increased nephron “workload” may contribute to chronic renal allograft rejection. Reducing dietary protein from 20 % to 8 % was tested in a model of chronic rejection: Dark Agouti kidney to Albino Surgery recipient, “tolerised” by previous donor blood transfusions. Survival, weight gain, serum creatinine concentration and creatinine clearance were similar for both groups at all times. Urinary protein was significantly (P 〈 0.05) lower in the low-protein (LP) group 1 month after transplantation. After 3 and 6 months, both groups demonstrated mild chronic rejection. After 6 months, tubular atrophy was significantly (P 〈 0.05) less in the LP group and interstitial fibrosis was marginally reduced. Glomerular hypertrophy, glomerular sclerosis, tubular dilatation, leucocyte infiltration, adhesion molecule expression and TGF-β 1 mRNA expression were similarly increased in both groups. Thus, reducing dietary protein to 8 % lowered urinary protein, but did not significantly affect the development of chronic rejection in renal allografts beyond affording a degree of protection from tubulointerstitial damage.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2568
    Keywords: EPIDERMAL GROWTH FACTOR ; TRANSFORMING GROWTHFACTOR-β1 ; CHRONIC REJECTION ; SMALL BOWEL ; TRANSPLANTATION
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Long-term survival of small bowel transplants ishampered by chronic rejection. Epidermal growth factor(EGF) and transforming growth factor β (TGF-β)have opposing, regulatory roles in normal intestinal physiology and may be involved in thepathogenesis of chronic intestinal rejection. Our aimwas to investigate the expression of EGF andTGF-β1 in chronically rejecting smallbowel transplants. Orthotopic small bowel transplantation was performed inthe allogeneic DA-to-AS rat combination; Cyclosporin wasadministered temporarily to prevent acute rejection.Controls were DA isografts and normal DA rats. PreproEGF and TGF-β1 geneexpression was evaluated by northern blot analysis ofthe ileum RNA and standardized againstglyceraldehyde-3-phosphate-dehydrogenase expression.Allografts demonstrated functional impairment and histological features of chronicrejection, whereas isografts appeared normal. Allograftsdemonstrated a significant reduction of EGF mRNA whencompared to DA isografts. No significant changes were detected in TGF-β1expression in either allogeneic or syngeneic grafts. Inconclusion, this study demonstrates reduced preproEGFand preserved TGF-β1 gene expression inchronically rejecting small bowel transplants.
    Type of Medium: Electronic Resource
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