** U.S.-listed shares of CRISPR Therapeutics CRSP.O up
~17% at $45.50 before the bell
** Late on Tuesday, a panel of advisers to U.S. Food and
Drug Administration recommended that CRSP and partner Vertex
Pharmaceuticals VRTX.O assess potential safety risks of their
sickle cell disease gene therapy after approval
** The advisory panel meeting gives greater confidence in
approval of the therapy called exa-cel - Jefferies
** Adds, feedback from meeting could indicate post-marketing
requirements and details on prescription label
** VRTX has proposed a 15-year follow up of patients to
evaluate its safety outcomes, if therapy is approved
** FDA's decision on the use of the therapy expected by Dec.
8.
** Stock down 5% this year, as of last close
(Reporting by Bhanvi Satija in Bengaluru)
((Bhanvi.Satija@thomsonreuters.com; Outside U.S. +91
9873062788;))