Б>The principal investors in drug development differ at each stage. While basic discovery research is funded primarily by government and by philanthropic organizations, late-stage development is funded mainly by pharmaceutical companies or venture capitalists. The period between discovery and proof of concept, however, is considered extremely risky and therefore has been difficult to fund. Several initiatives discussed below have been undertaken to overcome this funding gap.

Б>Historically, the largest government investments in basic drug discovery research have been made by the National Institutes of Health (NIH). The Defense Advanced Research Projects Agency (DARPA) has also contributed to the discovery stage by taking on some relatively high-risk biologic projects. Moreover, in part as a result of the public’s impatience with the slow pace of the discovery process, state governments are increasingly taking the initiative in this area. One such example is the California Institute for Regenerative Medicine, a state agency established in 2005 by the California Stem Cell Research and Cures Initiative, which provides grants and loans for stem cell research and facilities at California’s research institutions and universities. Another example is the Texas Cancer Initiative, under which state funds are dedicated to cancer research conducted in Texas. Beyond these public investments, private foundations are also taking a significant financial interest in the discovery process, facilitating progress by funding research in their particular areas of interest.

Б>At the other end of the continuum is late-stage development, which is funded primarily by pharmaceutical companies or venture capitalists with some collaborative support from government sources, such as NIH. Such partnerships are critical in the transition from proof of concept to clinical development.

Б>http://www.ncbi.nlm.nih.gov/books/NBK50972/