** Shares of drug developer Relay Therapeutics RLAY.O rise
14.58% to $7.15 premarket
** Co says its experimental breast cancer treatment
meaningfully extended the time patients lived without their
disease worsening in an early-stage trial
** The therapy helped 52 patients live for an average of 9.2
months without the disease worsening after treatment in the
study
** Co to start a late-stage trial for the combination next
year, pending regulatory discussions
** The treatment, RLY-2608, in combination with
AstraZeneca's AZN.L Faslodex, was generally well tolerated
across all doses, the company said
** The trial enrolled 118 heavily pre-treated patients with
PI3K mutant, advanced breast cancer
** Up to last close, stock down 43.3% YTD
(Reporting by Sneha S K)
((Sneha.SK@thomsonreuters.com;))