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Interleukin pattern of Apert fibroblasts in vitro
1Istituto di Istologia ed Embriologia generale, Università di Ferrara, Italy.
European Journal of Cell Biology
|June 17, 1998
Summary
Apert syndrome fibroblasts show altered interleukin (IL) secretion, with higher IL-1 receptor antagonist and lower IL-1/IL-6 levels, suggesting cytokine imbalances regulate extracellular matrix in this connective disorder.
Area of Science:
- Cell Biology
- Immunology
- Genetics
Background:
- Apert syndrome fibroblasts exhibit altered extracellular matrix (ECM) composition.
- Interleukins (ILs) modulate fibroblast phenotype, but their role in Apert syndrome is unclear.
Purpose of the Study:
- To investigate interleukin secretion patterns in Apert syndrome fibroblasts.
- To determine if cytokine profiles differ between Apert and normal fibroblasts.
Main Methods:
- Enzyme-linked immunosorbent assay (ELISA) to quantify IL-1, IL-6, and IL-1 receptor antagonist (IL-1ra).
- Bioactivity assays for IL-1.
- Northern blot analysis for cytokine mRNA expression.
Main Results:
- Apert fibroblasts secreted less IL-1 and IL-6 but significantly more IL-1ra than normal fibroblasts.
- IL-1 bioactivity was reduced in Apert cell supernatants.
- Apert cells showed high IL-6 mRNA but low secreted IL-6, indicating post-transcriptional regulation.
- IL-1ra treatment decreased IL-6 secretion, suggesting an autocrine effect.
Conclusions:
- Apert syndrome fibroblasts display a distinct cytokine profile characterized by increased IL-1ra and altered IL-1/IL-6 regulation.
- This cytokine imbalance may contribute to the altered ECM production and cellular phenotype in Apert syndrome.
- Interleukins likely act as autocrine regulators of ECM production in Apert fibroblasts.