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2016 ; 7
(7
): 697-701
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Discovery of MK-7145, an Oral Small Molecule ROMK Inhibitor for the Treatment of
Hypertension and Heart Failure
#MMPMID27437080
Tang H
; Zhu Y
; Teumelsan N
; Walsh SP
; Shahripour A
; Priest BT
; Swensen AM
; Felix JP
; Brochu RM
; Bailey T
; Thomas-Fowlkes B
; Pai LY
; Hampton C
; Corona A
; Hernandez M
; Metzger J
; Forrest M
; Zhou X
; Owens K
; Tong V
; Parmee E
; Roy S
; Kaczorowski GJ
; Yang L
; Alonso-Galicia M
; Garcia ML
; Pasternak A
ACS Med Chem Lett
2016[Jul]; 7
(7
): 697-701
PMID27437080
show ga
ROMK, the renal outer medullary potassium channel, is involved in potassium
recycling at the thick ascending loop of Henle and potassium secretion at the
cortical collecting duct in the kidney nephron. Because of this dual site of
action, selective inhibitors of ROMK are expected to represent a new class of
diuretics/natriuretics with superior efficacy and reduced urinary loss of
potassium compared to standard-of-care loop and thiazide diuretics. Following our
earlier work, this communication will detail subsequent medicinal chemistry
endeavors to further improve lead selectivity against the hERG channel and
preclinical pharmacokinetic properties. Pharmacological assessment of highlighted
inhibitors will be described, including pharmacodynamic studies in both an acute
rat diuresis/natriuresis model and a subchronic blood pressure model in
spontaneous hypertensive rats. These proof-of-biology studies established for the
first time that the human and rodent genetics accurately predict the in vivo
pharmacology of ROMK inhibitors and supported identification of the first small
molecule ROMK inhibitor clinical candidate, MK-7145.