AB-101 in Combination With B-Cell Depleting mAb in Patients Who Failed Treatment for Class III or IV Lupus Nephritis
AB-101 (also known as AlloNK) is an off-the shelf, allogeneic cell product made of "natural killer" cells, also called NK cells. White blood cells are part of the immune system and NK cells are a type of white blood cell that is known to enhance the effect of monoclonal antibody therapies.

This clinical trial will enroll adult patients with lupus nephritis Class III or IV either with or without the presence of Class V who relapsed or did not respond to previous standard of care treatment approaches.

The primary objective is to assess the safety, tolerability and preliminary activity of AB-101 plus rituximab after cyclophosphamide and fludarabine in adult subjects with relapsed/refractory lupus nephritis Class III or IV, with or without the presence of Class V.

Patients will be assigned to receive either AB-101 alone as monotherapy or in combination with rituximab. All patients will receive at least 1 treatment cycle of AB-101, followed by scheduled assessments of overall health and response status.

Patients may receive up to 2 cycles of treatment spaced 24 weeks apart.
- EligibilityCriteria: Inclusion Criteria:  Adult subjects with biopsy proven lupus nephritis Class III or IV either with or without the presence of Class V according to the 2018 Revised International Society of Nephrology/Renal Pathology Society (ISN/RPS) criteria, who failed or did not respond to previous standard of care treatment approaches A kidney biopsy must be performed < 24 weeks prior to the screening visit or during the screening period. Eligible subjects must have evidence of active disease on renal biopsy based on the modified NIH Lupus Nephritis activity and chronicity indices. Eligible subjects must have detectable anti-double stranded DNA antibody titers for enrollment.  Exclusion Criteria:  Known past or current malignancy other than inclusion diagnosis Known clinically significant cardiac disease Known past or current clinically significant lung disease, including: Current use of tobacco products Subjects with a history of HBV infections are considered ineligible - HealthyVolunteers: No - Gender: All - MinimumAge: 18 Years - MaximumAge: 99 Years - StdAgeList: Adult, Older Adult