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Engineered Tissue Implants benefited Knee Injured patients

Scientists at the University of Bristol have recommended that knee cartilage injuries could be possibly repaired by bioengineered tissue implants //without any signs of osteoarthritis progression.

'The maturation of cartilage implanted with engineered tissue has taken only about 12 months and this is the first of its kind to study' – researchers reports.

The study, 'Maturation of tissue engineered cartilage implanted in injured and osteoarthritic human knees', published in the July 2006 (Volume 12, Number 7) issue of Tissue Engineering, demonstrates that engineered cartilage tissue can grow and mature when implanted into patients with a knee injury. The novel tissue engineering approach can lead to cartilage regeneration even in knees affected by osteoarthritis.

The tissue engineering method used in this study involved isolating cells from healthy cartilage removed during surgery from 23 patients with an average age of 36 years. After growing the cells in culture for 14 days, the researchers seeded them onto scaffolds made of esterified hyaluronic acid, grew them for another 14 days on the scaffolds, and then implanted them into the injured knees of the study patients.

Cartilage regeneration was seen in ten of 23 patients, including in some patients with pre-existing early osteoarthritis of the knee secondary to traumatic injury. Maturation of the implanted, tissue-engineered cartilage was evident as early as 11 months after implantation.

Antony Hollander, ARC Professor of Rheumatology & Tissue Engineering at Bristol University who led the study, said: 'This is the first time we have shown that tissue-engineered cartilage implanted into knees can mature within 12 months after implantation, even in joints showing signs of osteoarthritis.

'Left untreated, many cartilage injuries will progress to osteoarthritis and the need for eventual replacement of the whole joint. Future investigations need to be carried
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