Tengion Inc is a regenerative medicine company. The company is engaged in discovering, manufacturing and commercializing neo-organs, or products composed of living cells, with or without synthetic or natural materials, implanted or injected into the body to engraft into, regenerate, or replace a damaged tissue or organ. Its product candidates seek to eliminate the need to utilize other tissues of the body for a purpose to which they are poorly suited, procure donor organs or administer anti-rejection medications. The company's solution Neo-Kidney Augment is based on its proprietary technology, which uses tubular epithelial cells, procured by a cortical biopsy of the patient's kidney, to create an injectable product candidate that can catalyze the regeneration of functional kidney tissue.