Exploratory Safety Study of ALD518 in Subjects With Steroid-refractory Acute Graft Versus Host Disease (GVHD)

An Exploratory Phase 1/2 Clinical Trial Evaluating ALD518 in Subjects With Glucocorticoid-Refractory Acute Graft vs. Host Disease (GVHD) After Allogeneic Hematopoietic Stem Cell Transplant (HSCT)

The purpose of this study is to determine the safe and tolerable, biologically active, and potentially effective doses(s) of ALD518 in subjects with acute GVHD, who have failed to respond to glucocorticosteroids, for further investigation in Part B.

Inclusion Criteria:

• Glucocorticosteroid refractory acute GVHD Grade 2-4
• Prior corticosteroid therapy at > 1.0mg/kg methylprednisolone or equivalent for minimum of 3 and maximum of 14 days
• Karnofsky Performance Satus Scale ≥ 50%
• Adequate laboratory testing at screening

Exclusion Criteria:

• Subjects having Stage 1 skin acute GVHD
• Subjects with Stage 3 or 4 liver GVHD
• Prior EBV associated malignancy
• Prior or current Hepatitis B or C
• Prior or active tuberculosis