Discovery of highly selective and orally active lysophosphatidic acid receptor-1 antagonists with potent activity on human lung fibroblasts.
Lysophosphatidic acid is a class of bioactive phospholipid that mediates most of its biological effects through LPA receptors, of which six isoforms have been identified. The recent results from LPA1 knockout mice suggested that blocking LPA1 signaling could provide a potential novel approach for the treatment of idiopathic pulmonary fibrosis. Here, we report the design and synthesis of pyrazole- and triazole-derived carbamates as LPA1-selective and LPA1/3 dual antagonists. In particular, compound 2, the most selective LPA1 antagonist reported, inhibited proliferation and contraction of normal human lung fibroblasts (NHLF) following LPA stimulation. Oral dosing of compound 2 to mice resulted in a dose-dependent reduction of plasma histamine levels in a murine LPA challenge model. Furthermore, we applied our novel antagonists as chemistry probes and investigated the contribution of LPA1/2/3 in mediating the pro-fibrotic responses. Our results suggest LPA1 as the major receptor subtype mediating LPA-induced proliferation and contraction of NHLF.
Discovery Chemistry, Small Molecule Research, Pharmaceutical Research and Early Drug Development, Hoffmann-La Roche , 340 Kingsland Street, Nutley, New Jersey 07110, USA. yimin.qian@roche.com
Yimin
Y
Qian
Matthew
M
Hamilton
Achyutharao
A
Sidduri
Stephen
S
Gabriel
Yonglin
Y
Ren
Ruoqi
R
Peng
Rama
R
Kondru
Arjun
A
Narayanan
Terry
T
Truitt
Rachid
R
Hamid
Yun
Y
Chen
Lin
L
Zhang
Adrian J
AJ
Fretland
Ruben Alvarez
RA
Sanchez
Kung-Ching
KC
Chang
Matthew
M
Lucas
Ryan C
RC
Schoenfeld
Dramane
D
Laine
Maria E
ME
Fuentes
Christopher S
CS
Stevenson
David C
DC
Budd
D000284:Administration, Oral; D000818:Animals; D055808:Drug Discovery; D005347:Fibroblasts / Q000187:drug effects; D006801:Humans; D008168:Lung / Q000166:cytology / Q000187:drug effects*; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D011720:Pyrazoles / Q000737:chemistry / Q000494:pharmacology; D049368:Receptors, Lysophosphatidic Acid / Q000037:antagonists & inhibitors*; D021241:Spectrometry, Mass, Electrospray Ionization; D013329:Structure-Activity Relationship
D011720:Pyrazoles; D049368:Receptors, Lysophosphatidic Acid