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Updated: Aug 6, 2026
11:27
A Guide to Production, Crystallization, and Structure Determination of Human IKK1/α
Published on: November 2, 2018
IKKalpha and IKKbeta function in TNFalpha-stimulated adhesion molecule expression in human aortic smooth muscle cells
Christopher J MacKenzie1, Elwyn Ritchie, Andrew Paul
1Department of Physiology and Pharmacology, University of Strathclyde, John Arbuthnott Building, Strathclyde Institute for Biomedical Sciences, 27 Taylor Street, Glasgow, G4 0NR, Scotland, UK. christopher.mackenzie@strath.ac.uk
Cellular Signalling
|July 29, 2006
Summary
This study shows that blocking the NF-kappaB pathway prevents TNFalpha-stimulated adhesion molecule expression in human aortic smooth muscle cells. The IKKbeta kinase is identified as a key target for potential drug therapies.
Area of Science:
- Vascular Biology
- Molecular Medicine
- Immunology
Background:
- The regulation of adhesion molecules like ICAM-1 and VCAM-1 in vascular smooth muscle is not fully understood.
- The role of the NF-kappaB pathway and its upstream kinases in this process is controversial.
Purpose of the Study:
- To investigate the effect of inhibiting the NF-kappaB pathway on TNFalpha-induced ICAM-1 and VCAM-1 expression.
- To determine the specific roles of IKKalpha and IKKbeta kinases in this pathway.
Main Methods:
- Primary cultures of human aortic smooth muscle cells were used.
- Adenoviral constructs including wild-type IkappaB alpha, dominant-negative IKKalpha, and dominant-negative IKKbeta were employed.
- NF-kappaB DNA-binding activity, IKK kinase activity, IkappaB alpha degradation, and adhesion molecule expression were assessed.
Main Results:
- Blocking NF-kappaB with Ad.IkappaB alpha completely prevented TNFalpha-stimulated ICAM-1 and VCAM-1 expression.
- Inhibiting IKKbeta with Ad.IKKbeta+/- blocked TNFalpha-induced IKK activity, IkappaB alpha degradation, NF-kappaB binding, and adhesion molecule expression.
- Ad.IKKalpha+/- had no significant effect on NF-kappaB binding or adhesion molecule expression.
Conclusions:
- TNFalpha-stimulated ICAM-1 and VCAM-1 expression in human aortic smooth muscle cells is dependent on the NF-kappaB pathway.
- IKKbeta is a promising therapeutic target for modulating adhesion molecule expression.
- Adenoviral dominant-negative IKKbeta is an effective inhibitor of TNFalpha-induced ICAM-1 and VCAM-1 expression.
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