Gene therapy will also cure other hair problems like e.g. the graying of hair. The American biotech firm AntiCancer Inc. showed in 1995, that they can deliver melanin and test genes to the hair follicles by using liposomes as gene vectors. It is known, that the tyrosinase-gene colours hair. According to some press articles AntiCancer Inc. are also researching gene therapy to make hair curly permanently.