NEW YORK, 2013-01-15 11:00 CET (GLOBE NEWSWIRE) --
Callisto Pharmaceuticals, Inc. (OTCQB:CLSP) ('Callisto') today announced that
it convened its special meeting of stockholders yesterday and it has received
the necessary approvals from its stockholders to authorize Callisto's merger
with and into Synergy Pharmaceuticals Inc. ('Synergy') pursuant to the
previously announced Agreement and Plan of Merger, dated July 20, 2012, as
amended on October 15, 2012. Callisto and Synergy expect to close the merger as
soon as practicable.