Abstract:
OBJECTIVE:To assess the continued effectiveness and safety of Gel-200 following observation and open-label retreatment in an extension protocol following a randomized, double-blind, phosphate buffered saline (PBS)-controlled trial (initial treatment trial). DESIGN:Patients who completed initial blinded treatment were allowed to enroll into this extension protocol that permitted retreatment with Gel-200 when eligibility criteria were met. Retreatment was administered with a Gel-200 injection, without knowledge of initial treatment assignment (Gel-200 or PBS). Retreated patients were followed for up to 13 weeks. In the extension phase, durability of response following the first injection was analyzed by time to retreatment eligibility. During separate extension and retreatment phases, responses were assessed by WOMAC pain, stiffness, and physical function subscores, total score, and global assessments of disease activity (patient, physician) as well as safety of Gel-200. RESULTS:In the extension phase, time-to-event analyses through 26 weeks following the initial injection showed statistically significantly longer times to retreatment in patients receiving Gel-200 compared with PBS (P < 0.05). Retreatment with Gel-200, e.g., a second injection, resulted in statistically significant improvements from retreatment baseline in all outcome measures (P < 0.0001). The incidence and type of adverse events after retreatment were comparable to those observed following initial injection of Gel-200 without allergic reactions, including "pseudosepsis" or unanticipated treatment-related serious adverse events. CONCLUSIONS:These data demonstrate that a single injection of Gel-200 resulted in durable effectiveness through 26 weeks and that repeated treatment with Gel-200 relieved symptomatic osteoarthritis with a favorable safety profile.
journal_name
Cartilagejournal_title
Cartilageauthors
Strand V,Baraf HS,Lavin PT,Lim S,Hosokawa Hdoi
10.1177/1947603512451024subject
Has Abstractpub_date
2012-10-01 00:00:00pages
297-304issue
4eissn
1947-6035issn
1947-6043pii
10.1177_1947603512451024journal_volume
3pub_type
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