Inhibitors of secreted phospholipase A 2 suppress the release of PGE 2 in renal mesangial cells
摘要:
The upregulation of PGE(2) by mesangial cells has been observed under chronic inflammation condition. In the present work, renal mesangial cells were stimulated to trigger a huge increase of PGE(2) synthesis and were treated in the absence or presence of known PLA(2) inhibitors. A variety of synthetic inhibitors, mainly developed in our labs, which are known to selectively inhibit each of GIVA cPLA(2), GVIA iPLA(2), and GIIA/GV sPLA(2), were used as tools in this study. Synthetic sPLA(2) inhibitors, such as GK115 (an amide derivative based on the non-natural amino acid (R)-gamma-norleucine) as well as GK126 and GK241 (2-oxoamides based on the natural (S)-alpha-amino acid leucine and valine, respectively) presented an interesting effect on the suppression of PGE(2) formation. (C) 2016 Elsevier Ltd. All rights reserved.
Inhibitors of secreted phospholipase A 2 suppress the release of PGE 2 in renal mesangial cells
摘要:
The upregulation of PGE(2) by mesangial cells has been observed under chronic inflammation condition. In the present work, renal mesangial cells were stimulated to trigger a huge increase of PGE(2) synthesis and were treated in the absence or presence of known PLA(2) inhibitors. A variety of synthetic inhibitors, mainly developed in our labs, which are known to selectively inhibit each of GIVA cPLA(2), GVIA iPLA(2), and GIIA/GV sPLA(2), were used as tools in this study. Synthetic sPLA(2) inhibitors, such as GK115 (an amide derivative based on the non-natural amino acid (R)-gamma-norleucine) as well as GK126 and GK241 (2-oxoamides based on the natural (S)-alpha-amino acid leucine and valine, respectively) presented an interesting effect on the suppression of PGE(2) formation. (C) 2016 Elsevier Ltd. All rights reserved.
Hydroxamic Acids Constitute a Novel Class of Autotaxin Inhibitors that Exhibit <i>in Vivo</i> Efficacy in a Pulmonary Fibrosis Model
作者:Aikaterini Nikolaou、Ioanna Ninou、Maroula G. Kokotou、Eleanna Kaffe、Antreas Afantitis、Vassilis Aidinis、George Kokotos
DOI:10.1021/acs.jmedchem.8b00232
日期:2018.4.26
Autotaxin (ATX) catalyzes the hydrolysis of lysophosphatidylcholine (LPC) generating the lipid mediator lysophosphatidic acid (LPA). Both ATX and LPA are involved in various pathological inflammatory conditions, including fibrosis and cancer, and have attracted great interest as medicinal targets over the past decade. Thus, the development of novel potent ATX inhibitors is of great importance. We have developed a novel class of ATX inhibitors containing the zinc binding functionality of hydroxamic acid. Such novel hydroxamic acids that incorporate a non-natural delta-amino acid residue exhibit high in vitro inhibitory potency over ATX (IC50 values 50-60 nM). Inhibitor 32, based on delta-norleucine, was tested for its efficacy in a mouse model of pulmonary inflammation and fibrosis induced by bleomycin and exhibited promising efficacy. The novel hydroxamic ATX inhibitors provide excellent tools for the study of the role of the enzyme and could contribute to the development of novel therapeutic agents for the treatment of fibrosis and other chronic inflammatory diseases.
Inhibitors of secreted phospholipase A 2 suppress the release of PGE 2 in renal mesangial cells
The upregulation of PGE(2) by mesangial cells has been observed under chronic inflammation condition. In the present work, renal mesangial cells were stimulated to trigger a huge increase of PGE(2) synthesis and were treated in the absence or presence of known PLA(2) inhibitors. A variety of synthetic inhibitors, mainly developed in our labs, which are known to selectively inhibit each of GIVA cPLA(2), GVIA iPLA(2), and GIIA/GV sPLA(2), were used as tools in this study. Synthetic sPLA(2) inhibitors, such as GK115 (an amide derivative based on the non-natural amino acid (R)-gamma-norleucine) as well as GK126 and GK241 (2-oxoamides based on the natural (S)-alpha-amino acid leucine and valine, respectively) presented an interesting effect on the suppression of PGE(2) formation. (C) 2016 Elsevier Ltd. All rights reserved.