Israeli scientists say substance prevents cancer’s spread in mice with 90% successOn warpath against secondary tumors, scientists believe they’ve found a way to stop cancer cells from entering blood, moving around the body; but solution not yet in medicine formNathan Jeffay is The Times of Israel's health and science correspondentIsraeli scientists are aiming to produce the world’s first preventative drug designed to stop tumors causing secondary cancer, and say the active ingredient has shown more than 90 percent effectiveness in mice.They have published peer-reviewed research showing that it successfully prevented metastasis in mice, meaning it prevented the spread of diseased cells that can cause secondary cancer.The effectiveness rate reported means mice with breast cancer that received the peptide were at least 90% less likely to develop secondary tumors than the control group.Though the study focused on breast cancer, the team says it expects the peptide to be effective on all solid tumors — meaning cancers other than those of the blood, bone marrow or lymph nodes.We are taking a preventative approach, which could save many from a second illness and save many lives.”Chill said that the next challenge is to develop the peptide into a drug, with dosing mechanisms that can deliver it to the right location in the human body."