Written informed consent must be obtained before any assessment is performed.
To be eligible for inclusion in this study patients must meet all of the following criteria:
Patient must have a BMI between 18 -35 kg/m2
Patient must have symptomatic knee osteoarthritis predominantly in one knee (index knee)
Patient must have knee osteoarthritis (Kellgren-Lawrence grade 2 or 3) in the index knee, as confirmed by radiography
Patient must have radiographic confirmation of a medial joint space width of 1.5 to 3.5 mm for females, or 2 to 4 mm for males within the medial tibio-femoral compartment of the index knee
Subjects meeting any of the following criteria are not eligible for inclusion in this study:
Patient has a known autoimmune disease, inflammatory or chronic arthropathy
Patient had partial or complete joint replacement in one or both knees
Patient has symptomatic, isolated patello-femoral pain in the index knee as per the Investigator's examination
Pregnant or nursing (lactating) women
Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant.
Previous use of LRX712 or use of other investigational drugs at the time of enrollment, or within 5 half-lives of enrollment, or within 30 days, whichever is longer; or longer if required by local regulations
Patient has malalignment (valgus- or varus-deformity) ≥ 7.5° in the index knee as per anatomic PA axis measured by weight-bearing short knee radiography
History of significant cardiac conduction/electrophysiological disorder, e.g. familial long QT syndrome or known family history of Torsades de Pointes or prolonged QT syndrome or QTcF ≥ 450 msec (Fridericia Correction) for males and ≥ 460 msec for females at screening or baseline (by local 12-lead digitized ECG reading)
Signs or symptoms, in the judgment of the investigator, of a clinically significant systemic viral, bacterial or fungal infection within 30 days prior to screening.
Other protocol-defined inclusion/exclusion criteria may apply.