A new therapeutics company is getting started by three UMass Medical School researchers with $110 million in funding and the use of technology licensed from the Worcester school. At the heart of the new Boston company, Atalanta Therapeutics, is a proprietary technology licensed by UMass Medical School, which is a part-founder along with three of its researchers: Anastasia Khvorova, Craig Mello and Neil Aronin. They're using a proprietary technology licensed by the medical school called branched siRNA, an advancement in gene capabilities, that aims to treat neurodegenerative diseases. UMass Medical School's co-founders are among three of its top researchers, Atalanta said.