Abstract:
:In the present study we demonstrated Jurkat leukemia cell lines of TIB152 and TIB153 with different sensitivities to recombinant soluble TRAIL cytotoxicity. TRAIL receptor death receptor 5 (DR5) was constitutively localized in the rafts in both cell lines. FADD, caspase-8, and PI3K-p85 subunit were recruited into DR5 lipid rafts of TIB152 but not in TIB153 cells. The expression and enzyme activity of acid sphingomyelinase, which digests sphingomyeline to produce ceramide and plays an essential role in lipid raft assembling, were higher in the rafts of TIB152 than in TIB153. These data provide evidences that DR5-recruited raft components contribute to the different sensitivity of Jurkat leukemia cell lines to TRAIL-induced cell death and may throw some light on the development of better therapeutic strategies for the cancer cells resistant to TRAIL treatment.
journal_name
IUBMB Lifejournal_title
IUBMB lifeauthors
Min Y,Shi J,Zhang Y,Liu S,Liu Y,Zheng Ddoi
10.1002/iub.166subject
Has Abstractpub_date
2009-03-01 00:00:00pages
261-7issue
3eissn
1521-6543issn
1521-6551journal_volume
61pub_type
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