A Basket Trial of Refractory Rheumatoid Arthritis (RA), Sjögren's Disease (SjD), Idiopathic Inflammatory Myopathies (IIMs) and Systemic Sclerosis (SSc) subjects to evaluate the safety and efficacy of AlloNK, a non-genetically modified allogeneic NK cell, in combination with rituximab.

An open-label Phase 2a study to evaluate the safety and efficacy of AlloNK®, an allogeneic cord blood-derived NK cell therapy, in combination with rituximab in relapsing forms of B-cell dependent rheumatologic diseases.

AlloNK® (also known as AB-101) is a non-genetically modified, allogeneic, off-the-shelf, cryopreserved cord blood-derived NK cell therapy.

For Subjects with Refractory Rheumatoid Arthritis (RA):

• Documented diagnosis of RA, meeting the 2010 ACR/EULAR classification criteria.
• Rheumatoid Factor (RF) or Anti Citrullinated Protein Antibody (ACPA) positive.
• High-sensitivity C-reactive protein (hs-CRP) > 3 mg/L or Erythrocyte Sedimentation Rate (ESR) > 28 mm/hr.
• Have had prior treatment for a period of at least 12 weeks with a biologic disease modifying anti-rheumatic drug and were deemed refractory by the treating physician.
• Minimum of six swollen joint counts (SJC) and six tender joint counts (TJC) according to joint assessment.

For subjects with Sjögren's Disease (SjD)

• Prior diagnosis of Primary SjD as per 2016 ACR/EULAR criteria with confirmatory diagnosis in the 24 weeks preceding screening.
• Total Clinical European League Against Rheumatism Sjogren's Syndrome Disease Activity Index (clinESSDAI) > 6.
• Salivary Flow Rate > 0.1 mL/min on stimulation.

For subjects with Idiopathic Inflammatory Myopathies (IIMs)

• Presence of a positive autoantibody (ANA >1:80 or RNP or SSA/SSB or other myositis specific autoantibodies.
• Refractory IIM as defined by inadequate response/intolerance to at least 3 months of glucocorticoids and/or at least one other immunosuppressive.
• Muscle biopsy or muscle MRI to confirm IIM diagnosis, where applicable, within 12 months prior to enrollment.

For Subjects with Systemic Sclerosis (SSc)

• Diagnosis of SSc in accordance with the ACR/EULAR 2013 classification.
• Modified Rodnan skin score (mRSS) > 10.
• Initial confirmatory diagnosis within 8 years of screening.
• Refractory SSc as defined by inadequate response/intolerance to at least 3 months of glucocorticoids and/or at least one other immunosuppressive.

AlloNK is early in clinical development, next steps will be based on the progress of our data.