** Shares of drug developer Marker Therapeutics MRKR.O up 29% at $1.63 premarket
** Co reports data from its ongoing early-stage trial testing its experimental therapy, MT-601, in patients with relapsed B-cell lymphoma, a type of blood cancer that has returned after previous treatment
** Co says 66% of patients saw their cancer shrink or disappear, with 50% showing no detectable cancer after treatment
** The therapy had no severe side effects, co says
** As of last close, stock down 60% YTD
(Reporting by Kamal Choudhury in Bengaluru)
((Kamal.Choudhury@thomsonreuters.com;))