VAY736

The Sjögren's Syndrome Symptom Diary (SSSD) oral dryness score is a patient-reported measure assessing severity of mouth dryness. The mouth dryness symptom is scored daily on a numerical scale (higher scores = worse symptoms).

* Plan A - United States of America and US reference countries * Plan B - EU, China, other non-US Regions and EU reference countries Dose response measured by change multi-dimensional disease activity as assessed by the physician. Score range is 0-123. Higher scores on the EULAR Sjogren's Syndrome Disease Activity Index (ESSDAI) scale are associated with poorer health states A negative change from baseline indicates improvement in disease status.

Efficacy (Plan A: US and US reference countries and Plan B: EU, China, other non-US Regions and EU reference countries) Dose response measured by change multi-dimensional disease activity as assessed by the physician. Score range is 0-123. Higher scores on the EULAR Sjogren's Syndrome Disease Activity Index (ESSDAI) scale are associated with poorer health states A negative change from baseline indicates improvement in disease status.

The primary endpoint was a composite of SRI-4 response at Week 29 with sustained reduction in oral corticosteroid from Week 17 through Week 29. Patients taking other rescue medication or prohibited medication or drop out before Week 29 were considered non-responders. SRI-4 response is defined as below: * having \>= 4 points reduction from baseline in Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) score (score is 0 to 105; a higher score indicating more severe disease) AND * no new British Isles Lupus Activity Group (BILAG)-2004 A organ domain score and no more than one new BILAG-2004 B organ domain scores compared with baseline AND * \<10 mm point increase from baseline with scale 0 to 100 mm in the physician's global assessment from baseline Sustained reduction in oral corticosteroid is defined as below: * =\< 5 mg/day or less than or equal to baseline dose, whichever was lower at Week 17 AND * no increase of that dose from Week 17 through Week 29

Difference in ALT normalization

The EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) instrument contains 12 organ-specific domains contributing to disease activity. For each domain, features of disease activity are scored in 3 or 4 levels according to their severity. These scores are then summed across the 12 domains in a weighted manner to provide the total score ranging 0-123. Higher scores on the EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) scale are associated with poorer health states. A negative change from baseline indicates improvement in disease status.

The effect of VAY736 on clinical disease activity was measured by the change in ESSDAI (EULAR Sjögren's syndrome disease activity index) between baseline and week 12. The instrument contains 12 organ-specific domains contributing to disease activity. For each domain, features of disease activity are scored in 3 or 4 levels according to their severity. These scores are then summed across the 12 domains in a weighted manner to provide the total score (range 0-123). A reduction from baseline indicates improvement in patients.

Number of subjects with Adverse Events during the double blind treatment period.

Part 1 The number of patients with adverse events after single intravenous (i.v.) dose of VAY736. Patients are assessed weekly up to 34 weeks post dose or until B cells reach the recovery criteria Part 2 The number of patients with adverse events after single subcutaneous (s.c.) dose of VAY736. Patients are assessed weekly, bi-weekly, then every 4, 8 and 12 weeks up to 188 weeks post dose or until B cells reach the recovery criteria. Part 3 The number of patients with adverse events after repeated subcutaneous (s.c) injections of a fixed dose of VAY736. Patients are assessed bi-weekly, then every 4 weeks and 8 weeks up to 27 weeks from the first dose.

Part 2 The ratio of area under curve (AUC) for single s.c dose and intravenous dose is determined

In Part 3: After the first and last s.c. doses, the area under the plasma concentration-time curve from time zero to the end of the dosing interval (AUCtau) will be determined

In Part 3: After the first and last s.c. doses, the Area under the plasma concentration-time curve from time zero to the time of the last quantifiable concentration (AUClast) will be determined.

In Part 3: After the first and last s.c. doses, the Observed maximum plasma concentration following drug administration (Cmax) will be determined

In Part 3: After the first and last s.c. doses, the time to reach the maximum concentration after drug administration (Tmax) will be determined

In Part 3: After the first and last s.c. doses, the terminal elimination half-life (T1/2) will be determined

In Part 3: After the first and last s.c. doses, Area under the plasma concentration-time curve from time zero to infinity (AUCinf) will be determined.

In Part 3: After the first and last s.c. doses, the concentration of VAY736 during the treatment period, before each dose (Ctrough) will be determined

Part 1 The percentage of patients with adverse events after single intravenous (i.v.) dose of VAY736. Patients are assessed weekly up to 34 weeks post dose or until B cells reach recovery criteria. Part 2 The percentage of patients with adverse events after single subcutaneous (s.c.) dose of VAY736. Patients are assessed weekly, bi-weekly, then every 4, 8 and 12 weeks up to 68 weeks post dose or until B cells reach recovery criteria.. Part 3 The percentage of patients with adverse events after repeated subcutaneous (s.c) injections of a fixed dose of VAY736. Patients are assessed bi-weekly, then every 4 weeks and 8 weeks up to 27 weeks from the first dose.