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Updated: Jun 14, 2026

A Microphysiological System to Study Leukocyte-Endothelial Cell Interaction during Inflammation
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[Induction effect of platelet-activating factor on Src-suppressed C kinase substrate gene expression in rat pulmonary

Shan Chen1, Geng-yun Sun, Qing-hai You

  • 1Department of Respiratory Medicine, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China.

Zhongguo Wei Zhong Bing Ji Jiu Yi Xue = Chinese Critical Care Medicine = Zhongguo Weizhongbing Jijiuyixue
|April 7, 2010
PubMed
Abstract

Insights

Platelet-activating factor (PAF) increases Src-suppressed C kinase substrate (SSeCKS) mRNA in rat pulmonary microvascular endothelial cells. The nuclear factor-kappaB (NF-κB) pathway, not protein kinase C (PKC), mediates this effect.

Area of Science:

  • Molecular biology
  • Cellular signaling
  • Endothelial cell function

Context:

  • Platelet-activating factor (PAF) is a potent lipid mediator involved in inflammation and vascular responses.
  • Src-suppressed C kinase substrate (SSeCKS) is a protein involved in cellular signaling and regulation.
  • Pulmonary microvascular endothelial cells (RPMVECs) play a critical role in lung function and vascular integrity.

Purpose:

  • To investigate the effect of PAF on SSeCKS mRNA expression in RPMVECs.
  • To elucidate the signal transduction pathways involved in PAF-mediated SSeCKS mRNA regulation.

Summary:

  • PAF stimulation dose-dependently and time-dependently increased SSeCKS mRNA levels in RPMVECs.
  • SSeCKS mRNA expression peaked at 1.5 hours post-PAF stimulation and remained elevated for 24 hours.
  • Inhibition of nuclear factor-kappaB (NF-κB) attenuated PAF-induced SSeCKS mRNA expression, while protein kinase C (PKC) inhibition had no effect.

Impact:

  • This study reveals that PAF upregulates SSeCKS mRNA expression in pulmonary endothelial cells.
  • The findings highlight the crucial role of the NF-κB signaling pathway in this process.
  • Understanding these mechanisms can provide insights into inflammatory lung diseases and vascular pathologies.

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