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- Brett Dumas, Hassan Yameen, Shayna Sarosiek, J Mark Sloan, and Vaishali Sanchorawala.
- Amyloidosis Center, Boston University School of Medicine and Boston Medical Center, Boston, MA, USA.
- Amyloid. 2020 Dec 1; 27 (4): 244-249.
AbstractThe proteasome inhibitor, bortezomib, has become a backbone for the first line treatment of patients with AL amyloidosis who are not eligible for high dose melphalan and stem cell transplantation. The presence of t(11;14), seen in up to 40-60% of patients with AL amyloidosis, may be associated with poorer response when treated with bortezomib based regimens. This remains a critical distinction in light of recent evidence demonstrating favourable responses to BCL-2 inhibition with venetoclax in patients with t(11;14) in multiple myeloma. We report on 135 patients with newly diagnosed AL amyloidosis treated with a bortezomib-based regimen as first line therapy between 2013 and 2017. Treatment outcomes were compared between a cohort of patients with t(11;14) and those without the translocation. Forty-four patients had the presence of t(11;14). Five-year overall survival was 46% for those with t(11;14) and 72% in patients without this translocation (p = .026). The median haematologic event free survival was 17 months for patients with t(11;14) compared to 34 months without (p = .068). Haematologic response of VGPR or better was achieved in 41% of patients with t(11;14) vs 66% without t(11;14) (p = .012). Cardiac and renal responses to first line treatment with bortezomib-based regimens were also higher in patients without t(11;14). In conclusion, patients with AL amyloidosis and the presence of t(11;14) have inferior outcomes with respect to survival, as well as haematologic and organ responses, when treated with bortezomib-based regimens as first line therapy.
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