Response Genetics Inc. said in a regulatory filing that Chief Financial Officer David D. O’Toole left the company last Wednesday, and the company had hired Kevin R. Harris to serve as interim CFO as of Monday.

Until earlier this month, Harris was CFO of struggling Los Angeles security software developer CyberDefender Corp., which has been sold to Santa Monica infomercial marketer Guthy-Renker Corp.

Shares on Tuesday jumped 14 percent to 91 cents on the Nasdaq, making the stock the biggest mover on the LABJ Stock Index.