title: Sirna Therapeutics
text: # Sirna Therapeutics
  
  Sirna Therapeutics, Inc. was a San Francisco, California based biotechnology company that explored the use of RNA interference in human disease therapy. Sirna's development pipeline included several small interfering RNA (siRNA) drugs, thought to stably silence the expression of specific disease-related genes. Sirna's clinical trial of an siRNA-based treatment for age-related macular degeneration was the first such trial for an siRNA drug.
  
  Sirna Therapeutics was acquired by Merck & Co. in 2006, the cash transaction deal was worth $1.1 billion.
  
  ## Headquarters and laboratory
  
  Sirna maintained its laboratory on the northeastern edge of Boulder, Colorado. Originally the corporate headquarters were also located in Boulder. Sirna, at one point, launched a search for a new headquarters complex. It originally considered multiple cities, including Cambridge, Massachusetts and San Diego, California.
  
  Sirna selected San Francisco due to its proximity to various scientific institutions, its workforce, and the payroll tax exemption for biotechnology companies. Sirna's move was a part of a trend of biotechnology companies moving to San Francisco, bolstered due to a campaign to attract biotechnology companies to San Francisco and tax breaks instituted by Mayor of San Francisco Gavin Newsom. Business leaders of San Francisco who hoped that the city would have a major biotechnology presence had a positive reception to the Sirna decision.
  
  The mayor's office, the Chamber of Commerce, and the San Francisco Center for Economic Development contributed to bringing Sirna to San Francisco. Howard Robin, the president and chief executive officer of Sirna, said that the first wave of moves would be the ten highest ranking employees; he did not say how many employees would relocate to San Francisco. The company planned to maintain a facility in Boulder. Ultimately Sirna occupied Suite 6504 at China Basin Landing, while the laboratory facilities remained in Boulder, with administrative, manufacturing, and research facilities.
  
  