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This phase II trial studies the treatment response for patients with acute graft-versus-host disease (GVHD). GVHD occurs when donor immune cells attack the healthy tissue of a bone marrow or stem cell transplant patient. The standard treatment for GVHD is to lower the activity of the donor cells by using steroid medications such as prednisone. But steroid treatment may cause many complications and the risk of these complications increases with higher doses of steroids and longer treatment. It is important to find ways to decrease the steroid treatment in patients who do not need long courses. Researchers are doing this study to find out how many subjects respond well to lower steroid dosing based on a blood test (GVHD biomarker) and if they develop fewer complications.

The LCH-IV is an international, multicenter, prospective clinical study for pediatric
Langerhans Cell Histiocytosis LCH (age < 18 years).

DF1001-001 is a study of a new molecule that targets natural killer (NK) cells and T-cell
activation signals to specific receptors on cancer cells. The study will occur in two phases.
The first phase will be a dose escalation phase, enrolling patients with various types of
solid tumors that express human epidermal growth factor receptor 2 (HER2). The second phase
will include a dose expansion using the best dose selected from the first phase of the study.
Multiple cohorts will be opened with eligible patients having either HER2 activated non-small
cell lung cancer, hormone receptor (HR) positive HER2 negative metastatic breast cancer, or
HER2 positive metastatic breast cancer. DF1001-001 will be administered as monotherapy or in
combination; combinations are DF1001 + nivolumab, DF1001 + Nab paclitaxel, and DF1001 +
sacituzumab govitecan-hziy.

This phase II trial studies how well acalabrutinib works in treating patients with chronic graft versus host disease. Acalabrutinib may be an effective treatment for graft-versus-host disease caused by a stem cell transplant.