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2015 ; 19
(12
): 2780-92
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The I?B kinase inhibitor ACHP strongly attenuates TGF?1-induced myofibroblast
formation and collagen synthesis
#MMPMID26337045
Mia MM
; Bank RA
J Cell Mol Med
2015[Dec]; 19
(12
): 2780-92
PMID26337045
show ga
Excessive accumulation of a collagen-rich extracellular matrix (ECM) by
myofibroblasts is a characteristic feature of fibrosis, a pathological state
leading to serious organ dysfunction. Transforming growth factor beta1 (TGF?1) is
a strong inducer of myofibroblast formation and subsequent collagen production.
Currently, there are no remedies for the treatment of fibrosis. Activation of the
nuclear factor kappa B (NF-?B) pathway by phosphorylating I?B with the enzyme I?B
kinase (IKK) plays a major role in the induction of fibrosis. ACHP
{2-Amino-6-[2-(cyclopropylmethoxy)-6-hydroxyphenyl]-4-(4-piperidinyl)-3
pyridinecarbonitrile}, a selective inhibitor of IKK, prohibits the activation of
the NF-?B pathway. It is not known whether ACHP has potential anti-fibrotic
properties. Using adult human dermal and lung fibroblasts we have investigated
whether ACHP has the ability to inhibit the TGF?1-induced transition of
fibroblasts into myofibroblasts and its excessive synthesis of ECM. The presence
of ACHP strongly suppressed the induction of the myofibroblast markers
alpha-smooth muscle actin (?SMA) and SM22?, as well as the deposition of the ECM
components collagen type I and fibronectin. Furthermore, post-treatment with ACHP
partly reversed the expression of ?SMA and collagen type I production. Finally,
ACHP suppressed the expression of the three collagen-modifying enzymes lysyl
hydroxylase (PLOD1, PLOD2 and PLOD3) in dermal fibroblasts, but did not do so in
lung fibroblasts. We conclude that the IKK inhibitor ACHP has potent antifibrotic
properties, and that the NF-?B pathway plays an important role in myofibroblast
biology.