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Realgar nanoparticles versus ATO arsenic compounds induce in vitro and in vivo activity against multiple myeloma.
- Source :
- British Journal of Haematology; Dec2017, Vol. 179 Issue 5, p756-771, 16p, 1 Color Photograph, 3 Black and White Photographs, 3 Graphs
- Publication Year :
- 2017
-
Abstract
- Multiple myeloma (MM), a B cell malignancy characterized by clonal proliferation of plasma cells in the bone marrow, remains incurable despite the use of novel and conventional therapies. In this study, we demonstrated MM cell cytotoxicity triggered by realgar (REA; As<subscript>4</subscript>S<subscript>4</subscript>) nanoparticles (NREA) versus Arsenic trioxide (ATO) against MM cell lines and patient cells. Both NREA and ATO showed in vivo anti-MM activity, resulting in significantly decreased tumour burden. The anti-MM activity of NREA and ATO is associated with apoptosis, evidenced by DNA fragmentation, depletion of mitochondrial membrane potential, cleavage of caspases and antiapoptotic proteins. NREA induced <subscript>2G</subscript>/M cell cycle arrest and modulation of cyclin B1, p53 (TP53), p21 (CDKN1A), Puma (BBC3) and Wee-1 (WEE1). Moreover, NREA induced modulation of key regulatory molecules in MM pathogenesis including JNK activation, c-Myc (MYC), BRD4, and histones. Importantly, NREA, but not ATO, significantly depleted the proportion and clonogenicity of the MM stem-like side population, even in the context of the bone marrow stromal cells. Finally, our study showed that both NREA and ATO triggered synergistic anti-MM activity when combined with lenalidomide or melphalan. Taken together, the anti-MM activity of NREA was more potent compared to ATO, providing the preclinical framework for clinical trials to improve patient outcome in MM. [ABSTRACT FROM AUTHOR]
- Subjects :
- MULTIPLE myeloma
ARSENIC sulfide
ARSENIC trioxide
NANOPARTICLES
APOPTOSIS
Subjects
Details
- Language :
- English
- ISSN :
- 00071048
- Volume :
- 179
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- British Journal of Haematology
- Publication Type :
- Academic Journal
- Accession number :
- 126531816
- Full Text :
- https://doi.org/10.1111/bjh.14974