U.S.researchers say they have shown that the Zika virus can kill stem cells in brain tumors

 Scientists who study viruses have long tried to harness their power to cause illness in healthy cells, and engineer them to attack and destroy cancer cells.
 Now researchers at Washington University say they have shown that the Zika virus can kill stem cells in brain tumors in the lab.
 Zika is a mosquito-borne virus that can cause severe brain damage in a developing fetus if the woman catches the virus when pregnant.
 Since Zika affects stem cells in the fetus’ brain, scientists theorized that it might be able to infect stem cells in brain tumors.
 “We take a virus, learn how it works and then we leverage it,” said Dr. Michael Diamond, a professor of molecular microbiology, pathology and immunology. “Let’s take advantage of what it’s good at, use it to eradicate cells we don’t want. Take viruses that would normally do some damage and make them do some good.”

zika virus　　　　ジカウイルス
cause severe brain damage　　　重度の脳障害を引き起こす
selectively kill　　　選択的に～を死滅させる →
　　　　　　　　　　　　　　 ～のみを（選んで）死滅させる
hard-to-treat cancerous cells　　　治療が困難ながん細胞