Clinical and Experimental Pediatrics

대한소아청소년과학회 (The Korean Pediatric Society)
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Expression of peroxisome proliferator-activated receptor (PPAR)-${\alpha}$ and PPAR-${\gamma}$ in the lung tissue of obese mice and the effect of rosiglitazone on proinflammatory cytokine expressions in the lung tissue

  • Ryu, Seung Lok (Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Shim, Jae Won (Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Kim, Duk Soo (Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Jung, Hye Lim (Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Park, Moon Soo (Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Park, Soo-Hee (Institute of Medical Research, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Lee, Jinmi (Institute of Medical Research, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Lee, Won-Young (Department of Endocrinology and Metabolism, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine) ;
  • Shim, Jung Yeon (Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine)
  • 투고 : 2012.08.29
  • 심사 : 2012.10.24
  • 발행 : 2013.04.15
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초록

Purpose: We investigated the mRNA levels of peroxisome proliferator-activated receptor (PPAR)-${\alpha}$, PPAR-${\gamma}$, adipokines, and cytokines in the lung tissue of lean and obese mice with and without ovalbumin (OVA) challenge, and the effect of rosiglitazone, a PPAR-${\gamma}$ agonist. Methods: We developed 6 mice models: OVA-challenged lean mice with and without rosiglitazone; obese mice with and without rosiglitazone; and OVA-challenged obese mice with and without rosiglitazone. We performed real-time polymerase chain reaction for leptin, leptin receptor, adiponectin, vascular endothelial growth factor (VEGF), tumor necrosis factor (TNF)-${\alpha}$, transforming growth factor (TGF)-${\beta}$, PPAR-${\alpha}$ and PPAR-${\gamma}$ from the lung tissue and determined the cell counts and cytokine levels in the bronchoalveolar lavage fluid. Results: Mice with OVA challenge showed airway hyperresponsiveness. The lung mRNA levels of PPAR${\alpha}$ and PPAR-${\gamma}$ increased significantly in obese mice with OVA challenge compared to that in other types of mice and decreased after rosiglitazone administeration. Leptin and leptin receptor expression increased in obese mice with and without OVA challenge and decreased following rosiglitazone treatment. Adiponectin mRNA level increased in lean mice with OVA challenge. Lung VEGF, TNF-${\alpha}$, and TGF-${\beta}$ mRNA levels increased in obese mice with and without OVA challenge compared to that in the control mice. However, rosiglitazone reduced only TGF-${\beta}$ expression in obese mice, and even augmented VEGF expression in all types of mice. Rosiglitazone treatment did not reduce airway responsiveness, but increased neutrophils and macrophages in the bronchoalveolar lavage fluid. Conclusion: PPAR-${\alpha}$ and PPAR-${\gamma}$ expressions were upregulated in the lung tissue of OVA-challenged obese mice however, rosiglitazone treatment did not downregulate airway inflammation in these mice.

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참고문헌

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피인용 문헌

  1. Adiponectin and Asthma: Knowns, Unknowns and Controversies vol.22, pp.16, 2013, https://doi.org/10.3390/ijms22168971