** Shares of drug developer CymaBay Therapeutics CBAY.O
rise 24.6% to $32.0 premarket
** Gilead Sciences GILD.O says it will acquire CBAY for
$4.3 billion, in a bid to expand its portfolio of liver disease
drugs
** Under the deal, GILD will gain access to CymaBay's lead
drug candidate, seladelpar, for the treatment of primary biliary
cholangitis — a type of chronic inflammatory liver disease
** GILD will pay CBAY $32.50 per share in cash, representing
a premium of 26.5% to Friday's close
** U.S. health regulator has accepted CBAY's marketing
application for seladelpar under priority review and will decide
on the use of the drug by Aug. 14
** Up to last close, CBAY has more than tripled in the last
12 months
(Reporting by Mariam E Sunny in Bengaluru)