The DOI matches its Crossref record; 46 of the 46 references it cites were found in a registry or an index.
Inhibition of STAT3 signaling induces apoptosis and decreases survivin expression in primary effusion lymphoma
Abstract
Despite some exciting new leads in molecular pathogenesis, AIDS-defining primary effusion lymphoma (PEL) remains a fatal malignancy. The lack of substantial progress in the management of PEL demands innovative treatment approaches. Targeting intracellular molecules critical to cell survival is one unexplored strategy for treating PEL. Here we show that inhibition of signal transducer and activator of transcription–3 (STAT3) leads to apoptosis in PEL cells. STAT3 is constitutively phosphorylated in PEL cell lines BC-1, BCBL-1, and VG-1. Transduction of dominant-negative STAT3 and pharmacological STAT3 inhibition caused caspase-dependent cell death. Although STAT3 activation is known to induce expression of Bcl-2 family proteins, PEL cell apoptosis was independent of Bcl-2, Bcl-XL, or Mcl-1 protein expression. Instead, STAT3 inhibition induced transcriptional repression of survivin, a recently identified inhibitor of apoptosis. Forced overexpression of survivin rescued VG-1 cells from apoptosis induced by STAT3 inhibition. Our findings suggest that activated STAT3 signaling directly contributes to malignant progression of PEL by preventing apoptosis, acting through the prosurvival protein survivin. Since constitutive STAT3 activation and survivin expression have been widely documented in different types of cancers, their linkage may extend to many malignancies and be critical to their pathogenesis.
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Metadata
- Authors
- Aoki, Y., Feldman, G. M., & Tosato, G.
- Venue
- Blood
- Publisher
- American Society of Hematology
- Published
- 2003-02-15
- Volume
- 101
- Issue
- 4
- Pages
- 1535-1542
- ISSN
- 0006-4971 (ISSN-L)
- 1528-0020
- OpenAlex
- W2045429389
- Cited by
- 438
- References
- 46
- FWCI
- 10.80
- Type
- journal article
- Language
- en
- Open access
- closed
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