WASHINGTON (Reuters) - A new chemical compound, part-cat and part-human, may provide an end to misery-making cat allergies, U.S. researchers reported on Sunday. And they said their approach in creating the compound may work against more dangerous allergies, such as deadly peanut allergies. The compound, tested in mice bred to be allergic to cats, virtually shut down the histamine reaction that causes the uncomfortable symptoms of cat allergies such as runny eyes, sneezing and itching, Dr. Andrew Saxon of the University of California Los Angeles School of Medicine and colleagues reported. Writing in the April issue of Nature Medicine, they...