** Shares of cancer drug developer Iteos Therapeutics ITOS.O rise 14.7% at $19.16 premarket
** Co says its lung cancer drug, belrestotug, in combination with GSK's GSK.L drug, dostarlimab, showed reduction or disappearance of tumor in 63.3%-76.7% patients, vs 37.5% in patients given only GSK's drug
** GSK's cancer drug dostarlimab is sold under the brand name Jemperli
** The combo was tested in patients with an advanced kind of lung cancer called non-small cell lung cancer
** Stock up 52.5% YTD, as of last close
(Reporting by Kashish Tandon in Bengaluru)