Unique changes in interstitial extracellular matrix composition are associated with rejection and cyclosporine toxicity in human renal allograft biopsies

被引:46
作者
Abrass, CK
Berfield, AK
Stehman-Breen, C
Alpers, CE
Davis, CL
机构
[1] Univ Washington, Sch Med, Dept Med, Div Nephrol, Seattle, WA 98195 USA
[2] Univ Washington, Sch Med, Dept Surg, Div Transplantat, Seattle, WA 98195 USA
[3] Univ Washington, Sch Med, Dept Pathol, Seattle, WA 98195 USA
[4] Vet Affairs Puget Sound Hlth Care Syst, Seattle, WA USA
关键词
cyclosporine; rejection; renal allograft; COL4A3; laminin; collagen; interstitial fibrosis;
D O I
10.1016/S0272-6386(99)70252-0
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
Renal allograft loss from chronic rejection or cyclosporine toxicity (CsAT) is characterized by progressive interstitial fibrosis, yet the protein composition of these lesions is unknown, The normal tubular basement membrane (TBM) contains laminin (LM), collagen IV (containing collagen IV alpha chain 1 [COL4A1] and COL4A2), thrombospondin (TSP), and fibronectin (FN), Only TSP and FN extend beyond the TBM into the interstitial space, Very scanty amounts of interstitial collagens (I and III) are detected in the interstitium, In a pilot study of human renal allograft biopsy specimens, three patterns of extracellular matrix (ECM) composition were identified. Pattern 1 showed no change in ECM composition; pattern 2 showed generalized accumulation of collagens I and III in the interstitium; and pattern 3 showed new expression of COL4A3 and LM-beta 3 in the proximal TBM, Criteria were established for the clinicopathological diagnosis of CsAT and rejection, These diagnoses were correlated with the ECM composition in 22 renal allograft biopsy specimens. Control groups were examined in a similar manner and included native kidney biopsy specimens from patients with other allografts (n = 7), renal biopsy specimens from patients with glomerular disease (n = 9), and renal allograft biopsy specimens from patients without clinicopathological evidence of renal disease. These data show that rejection is associated with pattern 3 and CsAT is associated with pattern 2, Thus, detection of ECM composition may be a useful adjunct to standard microscopy in distinguishing rejection from CsAT in renal allograft biopsy specimens. These data suggest that interstitial fibrosis associated with rejection and CsAT result from different pathogenic mechanisms. This is a US government work, There are no restrictions on its use.
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页码:11 / 20
页数:10
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