PMID- 8691733 OWN - NLM STAT- MEDLINE DCOM- 19960829 LR - 20190725 IS - 0085-2538 (Print) IS - 0085-2538 (Linking) VI - 49 IP - 4 DP - 1996 Apr TI - Quantification of glomerular TGF-beta 1 mRNA in patients with diabetes mellitus. PG - 1120-6 AB - 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. FAU - Iwano, M AU - Iwano M AD - First Department of Internal Medicine, Nara Medical University, Japan. FAU - Kubo, A AU - Kubo A FAU - Nishino, T AU - Nishino T FAU - Sato, H AU - Sato H FAU - Nishioka, H AU - Nishioka H FAU - Akai, Y AU - Akai Y FAU - Kurioka, H AU - Kurioka H FAU - Fujii, Y AU - Fujii Y FAU - Kanauchi, M AU - Kanauchi M FAU - Shiiki, H AU - Shiiki H FAU - Dohi, K AU - Dohi K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Kidney Int JT - Kidney international JID - 0323470 RN - 0 (RNA, Messenger) RN - 0 (Transforming Growth Factor beta) RN - 9007-34-5 (Collagen) SB - IM CIN - Kidney Int. 1998 Oct;54(4):1390-1. PMID: 9773681 MH - Aged MH - Base Sequence MH - Biopsy MH - Blotting, Southern MH - Collagen/genetics MH - Diabetes Mellitus/*genetics/metabolism MH - Diabetic Neuropathies/*genetics/metabolism MH - Female MH - Humans MH - Immunohistochemistry MH - Kidney Glomerulus/*chemistry/pathology MH - Male MH - Microscopy, Confocal MH - Middle Aged MH - Molecular Sequence Data MH - Polymerase Chain Reaction MH - RNA, Messenger/analysis MH - Transforming Growth Factor beta/analysis/*genetics EDAT- 1996/04/01 00:00 MHDA- 1996/04/01 00:01 CRDT- 1996/04/01 00:00 PHST- 1996/04/01 00:00 [pubmed] PHST- 1996/04/01 00:01 [medline] PHST- 1996/04/01 00:00 [entrez] AID - S0085-2538(15)59456-8 [pii] AID - 10.1038/ki.1996.162 [doi] PST - ppublish SO - Kidney Int. 1996 Apr;49(4):1120-6. doi: 10.1038/ki.1996.162.