Efficacy and Safety of Low-dose Ibrutinib and Itraconazole in Chronic Graft Versus Host Disease

Summary

Chronic graft-versus-host disease (cGVHD) affects 30 to 70% of Allogeneic Hematopoietic Cell Transplantation, decreases the quality of life, and increases mortality. First-line treatments for cGVHD are steroids, however, up to 50% of patients do not respond to treatment. There is no well-defined second-line treatment for cGVHD, but ibrutinib, a Bruton tyrosine kinase inhibitor, has been successfully used in phase 2 clinical trials for moderate to severe steroid-refractory cGVHD and has been shown to be safe, showing rates of response of 69% at a median follow-up of 26 months. Therefore, ibrutinib was approved by the FDA for the treatment of steroid-refractory cGVHD. Also, it is known that ibrutinib is metabolized by cytochrome isoenzyme 3A4 and that itraconazole is a potent inhibitor of this hepatic isoenzyme. Therefore, the investigators hypothesized that in subjects with newly diagnosed cGVHD and in patients with steroid-refractory cGVHD, low-dose ibrutinib in combination with itraconazole might be effective and safe.

Timeline

Start

2022-04-01

Primary completion

2023-04-01

Completion

2023-08-01

Publications

• Background Wolff D, Fatobene G, Rocha V, Kroger N, Flowers ME. Steroid-refractory chronic graft-versus-host disease: treatment options and patient management. Bone Marrow Transplant. 2021 Sep;56(9):2079-2087. doi: 10.1038/s41409-021-01389-5. Epub 2021 Jul 3.
• Results Waller EK, Miklos D, Cutler C, Arora M, Jagasia MH, Pusic I, Flowers MED, Logan AC, Nakamura R, Chang S, Clow F, Lal ID, Styles L, Jaglowski S. Ibrutinib for Chronic Graft-versus-Host Disease After Failure of Prior Therapy: 1-Year Update of a Phase 1b/2 Study. Biol Blood Marrow Transplant. 2019 Oct;25(10):2002-2007. doi: 10.1016/j.bbmt.2019.06.023. Epub 2019 Jun 28.
• Results Tapaninen T, Olkkola AM, Tornio A, Neuvonen M, Elonen E, Neuvonen PJ, Niemi M, Backman JT. Itraconazole Increases Ibrutinib Exposure 10-Fold and Reduces Interindividual Variation-A Potentially Beneficial Drug-Drug Interaction. Clin Transl Sci. 2020 Mar;13(2):345-351. doi: 10.1111/cts.12716. Epub 2019 Nov 29.

Drugs

Indications