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Research ArticleResearch

Intravenous Administration of Recombinant Human IL-10 Suppresses the Development of Anti–Thy 1–Induced Glomerulosclerosis in Rats

H. Rachmawati, L. Beljaars, C. Reker-Smit, H. I. Bakker, A. M. Van Loenen-Weemaes, M. N. Lub-De Hooge and K. Poelstra
PDA Journal of Pharmaceutical Science and Technology March 2011, 65 (2) 116-130;
H. Rachmawati
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L. Beljaars
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C. Reker-Smit
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H. I. Bakker
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A. M. Van Loenen-Weemaes
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M. N. Lub-De Hooge
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K. Poelstra
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Abstract

Aim: Interleukin-10 (IL-10) is a cytokine with potent antifibrotic and anti-inflammatory properties. However, IL-10 has a very short plasma half-life in vivo. This prompted the question whether a short intravenous treatment might have prolonged effects on more chronic processes like sclerosis.

Methods: Glomerulosclerosis was induced by anti-Thymocyte 1 (Anti–Thy 1) antibody. Four days after induction, an intravenous injection of recombinant human IL-10 (rhIL-10) was given for 3 consecutive days. Untreated rats received vehicle only (phosphate-buffered saline). Parameters of inflammation and fibrosis were assessed at protein and mRNA levels. Untreated rats showed renal histopathological changes as compared to normal rats.

Results: Glomerular matrix expansion and inflammatory cell influx was observed and an increase in glomerular-inducible nitric oxide synthetase and α-smooth muscle actin (α-SMA) were found on the protein level, factors that were clearly attenuated by IL-10 treatment. In particular, the decrease of matrix metalloproteinase-13 levels between days 4 and 7 was completely prevented by IL-10. In contrast, IL-10 did not significantly reduce mRNA levels for procollagen α1(1), α-SMA, and transforming growth factor 1.

Conclusion: A short-term treatment with rhIL-10 after induction of Anti–Thy 1 antibody nephritic rats attenuated intraglomerular inflammation, and at the protein level also influenced the parameters reflecting matrix deposition and degradation. Despite in fact that IL-10 was shown to be effective in the inhibition of matrix deposition, it had no beneficial effect on proteinuria.

LAY ABSTRACT: Interleukin-10 is a cytokine with potent antifibrotic and anti-inflammatory properties. Its short plasma half-life raises the question whether a short intravenous treatment might have prolonged effects on chronic disease like sclerosis. To confirm this, recombinant human interleukin-10 was used to treat glomerulosclerosis in rats. The disease was induced by Anti–Thy 1 antibody. Four days after induction, an intravenous injection of IL-10 was given for 3 consecutive days. Untreated rats received vehicle only (phosphate-buffered saline). Parameters of inflammation and fibrosis were assessed at protein and mRNA levels. In this study, untreated rats showed renal histopathological changes as compared to normal rats. Glomerular matrix expansion and inflammatory cell influx was observed, and increases in glomerular nitric oxide synthetase and α-smooth muscle actin α-SMA were found on the protein level. In contrast, treated rats clearly showed reduction of all these parameters. In particular, the decrease of anti-matrix metalloproteinase-13 (MMP-13) levels between days 4 and 7 was completely prevented by IL-10. However, IL-10 did not significantly reduce mRNA levels for procollagen α1(1), α-SMA, and TGFβ-1. Based on these results, it can be concluded that a short-term treatment with rhIL-10 after induction of Anti–Thy 1 antibody in nephritic rats attenuated intraglomerular inflammation, and at the protein level also influenced the parameters reflecting matrix deposition and degradation. Despite in fact that IL-10 was shown to be effective in the inhibition of matrix deposition, it had no beneficial effect on proteinuria.

  • Interleukin-10
  • Anti–Thy 1
  • Glomerulosclerosis
  • Matrix metalloprotein
  • Mesangial cell
  • ©PDA, Inc. 2011
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PDA Journal of Pharmaceutical Science and Technology: 65 (2)
PDA Journal of Pharmaceutical Science and Technology
Vol. 65, Issue 2
March/April 2011
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Intravenous Administration of Recombinant Human IL-10 Suppresses the Development of Anti–Thy 1–Induced Glomerulosclerosis in Rats
H. Rachmawati, L. Beljaars, C. Reker-Smit, H. I. Bakker, A. M. Van Loenen-Weemaes, M. N. Lub-De Hooge, K. Poelstra
PDA Journal of Pharmaceutical Science and Technology Mar 2011, 65 (2) 116-130;

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Intravenous Administration of Recombinant Human IL-10 Suppresses the Development of Anti–Thy 1–Induced Glomerulosclerosis in Rats
H. Rachmawati, L. Beljaars, C. Reker-Smit, H. I. Bakker, A. M. Van Loenen-Weemaes, M. N. Lub-De Hooge, K. Poelstra
PDA Journal of Pharmaceutical Science and Technology Mar 2011, 65 (2) 116-130;
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