** Shares of drug developer vTv Therapeutics VTVT.O fall
~39% to $12.95 after the bell
** Company says the U.S. FDA has placed a clinical hold on
its ongoing late-stage study testing its experimental treatment
for type 1 diabetes
** * Clinical hold was placed after a chromatographic signal
was observed during a recent study which assessed how the drug
was absorbed and distributed into the body - VTVT
** Chromatography is a technique used to separate and
analyze different components of a substance
** FDA requires a single laboratory test to characterize
this signal before the study can resume - VTVT
** No patient had been dosed in the study at the time of
the clinical hold and past clinical studies did not reveal any
clinically concerning safety issues - VTVT
** Up to last close, stock has risen 84.4% YTD
(Reporting by Sneha S K)
((Sneha.SK@thomsonreuters.com;))