** Cancer treatment maker 2seventy bio's shares TSVT.O
rise 9% to $3.8
** Co to sell all its experimental cell therapies to
Regeneron Pharmaceuticals REGN.O to focus on its only approved
product Abecma
** REGN will take on the program, infrastructure and
personnel costs related to TSVT's trials and pay an upfront
payment of $5 mln along with one milestone payment
** TVST also named Chief Operating Officer Chip Baird as its
new chief executive, while current CEO Nick Leschly takes over
the duties of chairman
** Including session gains, stock had fallen ~70% in last 12
months
(Reporting by Khushi Mandowara in Bengaluru)
((Khushi.Mandowara@thomsonreuters.com;))