Quantification of glomerular TGF-beta 1 mRNA in patients with diabetes mellitus - PubMed (original) (raw)
Quantification of glomerular TGF-beta 1 mRNA in patients with diabetes mellitus
M Iwano et al. Kidney Int. 1996 Apr.
Free article
Abstract
Transforming growth factor-beta 1 (TGF-beta 1) is a primary determinant of the mesangial expansion observed in diabetic nephropathy. In this study, we quantitated the levels of intraglomerular TGF-beta 1 mRNA in patients with diabetes mellitus using a competitive polymerase chain reaction (PCR) method. Renal biopsy specimens were obtained from 29 patients with non-insulin-dependent diabetes mellitus. Total RNA was extracted from the glomeruli and reverse transcribed into cDNA with reverse transcriptase. To prepare samples containing identical amounts of beta-actin cDNA (8 pg), we performed competitive PCR by co-amplifying mutant templates of beta-actin with a unique EcoRI site. We also used this competitive PCR method to measure TGF-beta 1 cDNA by co-amplifying mutant templates of TGF-beta 1. We observed higher expression of TGF-beta 1 mRNA in glomeruli of patients with diabetic nephropathy as compared with normal glomeruli. Intraglomerular TGF-beta 1 mRNA was elevated, even in the early stage of diabetic nephropathy. Moreover, levels of intraglomerular TGF-beta 1 mRNA correlated with values of HbA1c. These data suggest that hyperglycemia induces intraglomerular TGF-beta 1 mRNA expression in vivo, and that TGF-beta 1 overproduction may be associated with the progression of diabetic nephropathy.
Comment in
- Evidence that TGF-beta should be a therapeutic target in diabetic nephropathy.
Border WA, Noble NA. Border WA, et al. Kidney Int. 1998 Oct;54(4):1390-1. doi: 10.1046/j.1523-1755.1998.00127.x. Kidney Int. 1998. PMID: 9773681 Review. No abstract available.
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