As the article says, the researchers are going to find out why this gene isn't already stopping HIV infection. I.e. back to square one. This is not a cure, it's an interesting in vitro study. HIV is hard to fix because it evolves so quickly in an individual, in response to the immune system and anti-retrovirals. It appears already to have evolved around this gene's activity in vivo. Not sure why this is a headline.
stemceller writes to tell us that a team of researchers at the University of Alberta claims to have discovered a gene capable of blocking HIV thereby preventing the onset of full blown AIDS. "Stephen Barr, a molecular virologist in the Department of Medical Microbiology and Immunology, says his team has identified a gene called TRIM22 that can block HIV infection in a cell culture by preventing the assembly of the virus. 'When we put this gene in cells, it prevents the assembly of the HIV virus," said Barr, a postdoctoral fellow. "This means the virus cannot get out of the cells to infect other cells, thereby blocking the spread of the virus.'"