** Shares of China-based drug developer Gracell
Biotechnologies Inc GRCL.O up 16.4% at $3.84 premarket
** Co is among the few gainers on the Nasdaq biotech index
.NBI , amid a fall in U.S. stock index futures
** None of the 29 patients with a type of myeloma in co's
study had any signs of cancer cells in the body after receiving
GRCL's cell therapy drug, Gracell says urn:newsml:reuters.com:*:nPn1Y0DgQa
** Up to Friday's close, stock has declined ~45% this year
(Reporting by Manas Mishra in Bengaluru)
((Manas.Mishra@thomsonreuters.com;
www.twitter.com/Manaswrites15))