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2017 ; 73
(5
): 581-591
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gab.com Text
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English Wikipedia
First-in-human studies of seletalisib, an orally bioavailable small-molecule
PI3K? inhibitor for the treatment of immune and inflammatory diseases
#MMPMID28160012
Helmer E
; Watling M
; Jones E
; Tytgat D
; Jones M
; Allen R
; Payne A
; Koch A
; Healy E
Eur J Clin Pharmacol
2017[May]; 73
(5
): 581-591
PMID28160012
show ga
PURPOSE: PI3Ks are potential therapeutic targets in immune-inflammatory diseases.
These studies aimed to investigate the safety, tolerability and PK profile of
seletalisib, a selective inhibitor of PI3K? in humans. METHODS: These phase I,
randomised, double-blind, placebo-controlled, single-centre studies (NCT02303509,
NCT02207595) evaluated single and multiple oral doses of seletalisib (5-90 mg QD
and 30 mg BID) in healthy adults and subjects with mild-to-moderate psoriasis
(Study-1). Pharmacodynamic effects on markers of inflammation were assessed via
changes in ex vivo basophil degranulation and histological assessment of
psoriatic skin biopsies. RESULTS: Seletalisib was well tolerated at doses ?15 mg
(Study-1) and ?45 mg QD (Study-2) for 14 days. No safety concerns or
dose-limiting toxicities were identified (Study-1). Incidence of
gastrointestinal-related AEs was not dose related but higher incidences of rash
AEs were associated with higher-dose seletalisib (Study-2 rash AEs: 18 in 12
seletalisib-treated subjects versus 1 in 1 placebo-treated subject). Mean
seletalisib plasma concentration-time profiles increased with increasing doses
after single and multiple dosing, with no major deviations from
dose-proportionality. There was no unexpected accumulation or loss of exposure
after multiple dosing (time-independent pharmacokinetic profile). Apparent t
(1/2) values were supportive of once-daily dosing (geometric mean t(1/2):
Study-1, 17.7-21.1 h; Study-2, 18.1-22.4 h). No clinically significant food
effect was observed (Study-1). Pharmacodynamic findings demonstrated ex vivo
inhibition of basophil degranulation, improvements in histological assessment of
skin biopsies and other markers of psoriatic biology and preliminary evidence of
target engagement in psoriatic skin tissue. CONCLUSIONS: Seletalisib safety,
tolerability and pharmacokinetic/pharmacodynamic profiles support its continued
clinical development in immune-inflammatory diseases.
|*Phosphoinositide-3 Kinase Inhibitors
[MESH]
|Administration, Oral
[MESH]
|Biological Availability
[MESH]
|Double-Blind Method
[MESH]
|Enzyme Inhibitors/administration & dosage/adverse effects/*therapeutic use
[MESH]
|Humans
[MESH]
|Placebos
[MESH]
|Psoriasis/*drug therapy
[MESH]
|Pyridines/administration & dosage/*therapeutic use
[MESH]