Cytotoxic T-lymphocyte antigen 4 (CTLA4) is a co-receptor expressed by activated, memory T cells and regulatory T cells 1,2,3,4,5,6. It is a homodimer that can bind to the homodimeric ligands CD80 ...

Florida’s 'forgotten' coastline offers quaint towns and fresh seafood without the crowds Opinion: 'We are the free world now' — Europe declares war on free speech in the US Kennedy Center president ...

Exercise can reverse damage to sedentary, aging hearts and help prevent risk of future heart failure -- if it's enough exercise, and if it's begun in time, according to a new study by cardiologists.

New Delhi: The struggle is real and every athlete, great and small, goes through it. There are no exceptions. But as they’ll all tell anyone who’ll listen, the important thing is to keep struggling.

GOLD COAST, Australia: Two centuries ago, United States President James Monroe declared the Western Hemisphere off-limits to European powers in what would became known in history books as the “Monroe ...