Glomerular transforming growth factor-β1 mRNA as a marker of glomerulosclerosis - application in renal biopsies

Chih Wei Yang, Swei Hsueh, Mai Szu Wu, Ping Chin Lai, Jeng Yi Huang, Ching Herng Wu, Sau An Hu, Jung Fu Chen, Chiu Ching Huang

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

As transforming growth factor-β1 (TGF-β1) is implicated in the pathogenesis of glomerulosclerosis, the aim of the study was to demonstrate if levels of glomerular TGF-β1 mRNA in renal biopsies correlated with glomerulosclerosis. Glomeruli were collected by microdissection from renal biopsies in patients with membranous nephropathy, lupus nephritis, diabetic nephropathy, minimal change disease and IgA nephropathy presented by proteinuria when serum creatinine was <3 mg%. Glomerular mRNAs were reverse transcribed and TGF-β1, α2(IV) collagen, β-actin cDNA quantitated by competitive polymerase chain reaction (PCR). By semiquantitative electron microscopy, a 3.5-fold increase of glomerular TGF-β1/β-actin mRNA ratio in the moderate sclerotic group (n = 23, p <0.01) and a 1.5-fold increase in the mild sclerotic group (n = 22, p <0.05) were observed when compared to the minimal sclerotic group (n = 12). A concordant increase of glomerular α2(IV) collagen mRNA was found with 2.2- and 1.3-fold in moderate and mild sclerotic groups, respectively. The TGF-β1/β-actin mRNA ratios were highest in membranous nephropathy (466.4 ± 133.4, n = 11), followed by lupus nephritis (394.9 ± 94.8, n = 12) and diabetic nephropathy (333.2 ± 97.6, n = 10). Patients with minimal change disease (233.1 ± 54.1, n = 15) and IgA nephropathy (185.3 ± 39.6, n = 9) had low levels. The degree of glomerulosclerosis in each group followed the TCF-β1/β-actin mRNA ratios indicating that the level is the major determinant of glomerulosclerosis but not the disease entities. Glomerular TGF-β1/β-actin mRNA ratio did not correlate with clinical parameters such as the urinary protein excretion and creatinine clearance. These results suggest that glomerular TGF-β1/β-actin mRNA ratio may be used as a marker of glomerulosclerosis in renal biopsy to reflect the local sclerotic process.

Original languageEnglish
Pages (from-to)290-297
Number of pages8
JournalNephron
Volume77
Issue number3
Publication statusPublished - 1997
Externally publishedYes

Fingerprint

Transforming Growth Factors
Kidney
Biopsy
Actins
Messenger RNA
Lipoid Nephrosis
Membranous Glomerulonephritis
Lupus Nephritis
Diabetic Nephropathies
Immunoglobulin A
Creatinine
Collagen
Microdissection
Proteinuria
Electron Microscopy
Complementary DNA
Polymerase Chain Reaction
Serum

Keywords

  • Glomerulosclerosis
  • Renal biopsy
  • Reverse transcriptase-polymerase chain reaction
  • Transforming growth factor-β1

ASJC Scopus subject areas

  • Nephrology

Cite this

Yang, C. W., Hsueh, S., Wu, M. S., Lai, P. C., Huang, J. Y., Wu, C. H., ... Huang, C. C. (1997). Glomerular transforming growth factor-β1 mRNA as a marker of glomerulosclerosis - application in renal biopsies. Nephron, 77(3), 290-297.

Glomerular transforming growth factor-β1 mRNA as a marker of glomerulosclerosis - application in renal biopsies. / Yang, Chih Wei; Hsueh, Swei; Wu, Mai Szu; Lai, Ping Chin; Huang, Jeng Yi; Wu, Ching Herng; Hu, Sau An; Chen, Jung Fu; Huang, Chiu Ching.

In: Nephron, Vol. 77, No. 3, 1997, p. 290-297.

Research output: Contribution to journalArticle

Yang, CW, Hsueh, S, Wu, MS, Lai, PC, Huang, JY, Wu, CH, Hu, SA, Chen, JF & Huang, CC 1997, 'Glomerular transforming growth factor-β1 mRNA as a marker of glomerulosclerosis - application in renal biopsies', Nephron, vol. 77, no. 3, pp. 290-297.
Yang, Chih Wei ; Hsueh, Swei ; Wu, Mai Szu ; Lai, Ping Chin ; Huang, Jeng Yi ; Wu, Ching Herng ; Hu, Sau An ; Chen, Jung Fu ; Huang, Chiu Ching. / Glomerular transforming growth factor-β1 mRNA as a marker of glomerulosclerosis - application in renal biopsies. In: Nephron. 1997 ; Vol. 77, No. 3. pp. 290-297.
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AU - Hu, Sau An

AU - Chen, Jung Fu

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N2 - As transforming growth factor-β1 (TGF-β1) is implicated in the pathogenesis of glomerulosclerosis, the aim of the study was to demonstrate if levels of glomerular TGF-β1 mRNA in renal biopsies correlated with glomerulosclerosis. Glomeruli were collected by microdissection from renal biopsies in patients with membranous nephropathy, lupus nephritis, diabetic nephropathy, minimal change disease and IgA nephropathy presented by proteinuria when serum creatinine was <3 mg%. Glomerular mRNAs were reverse transcribed and TGF-β1, α2(IV) collagen, β-actin cDNA quantitated by competitive polymerase chain reaction (PCR). By semiquantitative electron microscopy, a 3.5-fold increase of glomerular TGF-β1/β-actin mRNA ratio in the moderate sclerotic group (n = 23, p <0.01) and a 1.5-fold increase in the mild sclerotic group (n = 22, p <0.05) were observed when compared to the minimal sclerotic group (n = 12). A concordant increase of glomerular α2(IV) collagen mRNA was found with 2.2- and 1.3-fold in moderate and mild sclerotic groups, respectively. The TGF-β1/β-actin mRNA ratios were highest in membranous nephropathy (466.4 ± 133.4, n = 11), followed by lupus nephritis (394.9 ± 94.8, n = 12) and diabetic nephropathy (333.2 ± 97.6, n = 10). Patients with minimal change disease (233.1 ± 54.1, n = 15) and IgA nephropathy (185.3 ± 39.6, n = 9) had low levels. The degree of glomerulosclerosis in each group followed the TCF-β1/β-actin mRNA ratios indicating that the level is the major determinant of glomerulosclerosis but not the disease entities. Glomerular TGF-β1/β-actin mRNA ratio did not correlate with clinical parameters such as the urinary protein excretion and creatinine clearance. These results suggest that glomerular TGF-β1/β-actin mRNA ratio may be used as a marker of glomerulosclerosis in renal biopsy to reflect the local sclerotic process.

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