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Enlarge Image Vulnerable. A new type of drug blocks a tumor cell's shield (left) against T cells (knights) so that they can attack. Credit: Ryan Snook, www.ryansnook.com A type of drug that helps the body's immune system attack tumors is showing promise. In early clinical trials involving several hundred patients with various kinds of advanced cancer, up to one-quarter of those who received the treatment saw their tumors shrink, and some are still alive more than a year later. The results are the latest good news for so-called immunotherapy treatments that work by overcoming a tumor's ability to evade...

Protein Design Labs Inc. (PDLI)Share price as of Wednesday's close: $15.02Share price now: $18.30Change: 21.8%Volume: 17.5 million shares, daily average 3.4 million sharesLast time this high: Feb. 15, 200252-week high: $45.4752-week low: $13.75Forward P/E before announcement: n/aForward P/E after announcement: n/aIF YOU THOUGHT Kent State's upset over Alabama in this year's NCAA tournament was wacky, wait until you hear this tale of March madness. Shares of Protein Design Labs (PDLI) jumped 21.8% on Thursday, one day after the company announced that its maintenance therapy for psoriasis wasn't much better than a placebo. Protein Design said Phase II tests of its...