Researchers from Tengion, Inc., whose science and technology facility is located in Winston-Salem, NC, presented their findings to reporters in a special press conference on May 18, 2008 at 9:30 a.m.

Patients with advanced bladder disease often require cystectomy (removal of the bladder). Replacement bladders made from intestinal tissue have been proven to be successful but have also been associated with many well documented complications, such as chronic urinary retention, hematuria and infection.

Growing a replacement organ for a patient using his or her own cells presents a new option. After a bladder biopsy is obtained from a patient, bladder progenitor cells are grown in culture and seeded on a biodegradable bladder-shaped scaffold made from collagen and/or polyglycolic acid. The neo-organ is then implanted into the patient.

Fourteen large mammals that underwent radical cystectomy were implanted with the neo-bladder construct and within six months, structure and pharmacological characteristics of the neo-bladder were similar to the native bladder. There was no evidence of abnormal tissue development, immune response or evidence of systemic response to the neo-bladder regeneration. Results suggest that the new organ had successfully and safely regenerated. -American Urological Association