Intragraft TGF-β1 mRNA: A correlate of interstitial fibrosis and chronic allograft nephropathy

Vijay K. Sharma, Roxana M. Bologa, Guo Ping Xu, Baogui Li, Janet Mouradian, John Wang, David Serur, Venkateswara Rao, Manikkam Suthanthiran

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Abstract

Chronic allograft nephropathy is a relentlessly progressive process and a major cause of long-term graft dysfunction and ultimate failure. Interstitial fibrosis, tubular atrophy, and glomerular and vascular lesions characterize this mechanistically unresolved disorder. Given the prominent role of TGF-β1 in tissue repair and in fibrosis, we have explored the hypothesis that fibrosis and chronic allograft nephropathy would be distinguished by intragraft TGF-β1 mRNA expression. This postulate was tested by mRNA phenotyping of RNA isolated from 127 human renal allograft biopsies. Reverse transcription assisted polymerase chain reaction was used to amplify and identify ingraft gene expression. Our investigation demonstrated a significant correlation between intragraft TGF-β1 mRNA display and renal allograft interstitial fibrosis and chronic allograft nephropathy. In contrast, intragraft expression of mRNA encoding immunoregulatory cytokines, IL-2, IFN-γ, IL-4, IL-10, or cytotoxic attack molecules, granzyme B and perforin was not a correlate of interstitial fibrosis or chronic allograft nephropathy. Our studies identify, for the first time, a significant association between intragraft TGF-β1 mRNA expression and renal allograft interstitial fibrosis, and advance a candidate molecular mechanism for chronic allograft nephropathy.

Original languageEnglish
Pages (from-to)1297-1303
Number of pages7
JournalKidney International
Volume49
Issue number5
DOIs
Publication statusPublished - 1 Jan 1996

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ASJC Scopus subject areas

  • Nephrology

Cite this

Sharma, V. K., Bologa, R. M., Xu, G. P., Li, B., Mouradian, J., Wang, J., Serur, D., Rao, V., & Suthanthiran, M. (1996). Intragraft TGF-β1 mRNA: A correlate of interstitial fibrosis and chronic allograft nephropathy. Kidney International, 49(5), 1297-1303. https://doi.org/10.1038/ki.1996.185