ReJoin for Knee Osteoarthritis

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Indication: Knee Osteoarthritis (KOA)

Technology Platform: Human Adipose-Derived Mesenchymal Progenitor Cells (haMPC)

Trial Phase: Clinical Trial Phase IIb, all patients completed treatment as of August 2014

The Trial . In 2013, we completed a Phase I/IIa clinical trial, in China, for our Knee Osteoarthritis (KOA) therapy named ReJoin™ . The trial tested the safety and efficacy of intra-articular injections of autologous haMPCs in order to reduce inflammation and repair damaged joint cartilage. The 6-month follow-up clinical data showed ReJoin™ therapy to be both safe and effective.

In Q2 of 2014 we completed patient enrollment for the Phase IIb clinical trial of ReJoin™ for KOA. The multi-center study has enrolled 53 patients to participate in a randomized, single blind trial. We published 48 weeks follow-up data of Phase I/IIa on December 5, 2014. The 48 weeks data indicated that patients have reported a decrease in pain and a significant improvement in mobility and flexibility, while the clinical data shows our ReJoin™ regenerative medicine treatment to be safe. We announced interim 24 week results for ReJoin™ on March 25, 2015, which confirmed that the primary and secondary endpoints of ReJoin™ therapy groups have all improved significantly compared to their baseline. We plan to release 12 month follow-up data in late 2015.

Our ReJoin™ human adipose-derived mesenchymal progenitor cell (haMPC) therapy for KOA is an interventional therapy using proprietary device, process, culture and medium:
• Obtain adipose (fat) tissue from the patient using our CFDA approved medical device, the A-Stromal™ Kit; and
• Expand haMPCs using our proprietary culture medium (serum-free and antibiotics-free); and
• formulated for ReJoin™ therapy using our proprietary formulation.

Our process is distinguishable from sole Stromal Vascular Fraction (SVF) therapy.
The immunophenotype of our haMPCs exhibited multiple biomarkers such as CD29+, CD73+, CD90+, CD49d+, HLA-I+, HLA-DR-, Actin-, CD14-, CD34-, and CD45-. In contrast, SVF is merely a heterogeneous fraction including preadipocytes, endothelial cells, smooth muscle cells, pericytes, macrophages, fibroblasts, and adipose-derived stem cells (ASCs).

About Knee Osteoarthritis
Osteoarthritis is a degenerative disease of the joints. KOA is one of the most common types of osteoarthritis. Pathological manifestation of osteoarthritis is primarily local inflammation caused by immune response and subsequent damage of joints. Restoration of immune response and joint tissues are the objective of therapies. According to International Journal of Rheumatic Diseases, 2011, 53% of KOA patients will degenerate to the point of disability.

Conventional treatment usually involves invasive surgery with painful recovery and physical therapy. As drug-based methods of management are ineffective, the same journal estimates that some 1.5 million patients with this disability will degenerate to the point of requiring artificial joint replacement surgery every year. However, only 40,000 patients will actually be able to undergo replacement surgery, leaving the majority of patients to suffer from a life-long disability due to lack of effective treatment.

KOAprocess Our KOA therapy is not surgically invasive – it uses a small amount (30ml) of adipose tissue obtained via liposuction from the patient, which is cultured and re-injected into the patient. The injections are designed to induce the body’s secretion of growth factors promoting immune response and regulation, and regrowth of cartilage. The down-regulation of the patient’s immune response is aimed at reducing and controlling inflammation which is a central cause of KOA. We believe our proprietary method, subsequent haMPC proliferation and processing know-how will enable haMPC therapy to be a low cost and relatively safe and effective treatment for KOA. Additionally, banked haMPCs can continue to be stored for additional use in the future.