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Abstract Title:

Garlic compounds induced calpain and intrinsic caspase cascade for apoptosis in human malignant neuroblastoma SH-SY5Y cells.

Abstract Source:

Apoptosis. 2007 Apr;12(4):671-84. PMID: 17219050

Abstract Author(s):

Surajit Karmakar, Naren L Banik, Sunil J Patel, Swapan K Ray

Abstract:

Malignant (N-type) neuroblastoma continues to defy current chemotherapeutic regimens. We tested the garlic compounds diallyl sulfide (DAS) and diallyl disulfide (DADS) for induction of apoptosis in human malignant neuroblastoma SH-SY5Y cells. Viability of human primary neurons was unaffected after 24 h treatment with 50 and 100 microM DAS and 50 microM DADS but slightly affected with 100 microM DADS. Treatment with 50 and 100 microM DAS or DADS significantly decreased viability in SH-SY5Y cells. Wright staining showed morphological features of apoptosis in SH-SY5Y cells treated with 50 and 100 microM DAS or DADS for 24 h. ApopTag assay demonstrated DNA fragmentation in apoptotic cells. Apoptosis was associated with an increase in [Ca(2+)](i), increase in Bax:Bcl-2 ratio, mitochondrial release of cytochrome c, increase in cytosolic Smac/Diablo, and down regulation of inhibitor-of-apoptosis proteins and nuclear factor kappa B (NFkappaB). Activation of caspase-9 and caspase-3 indicated involvement of intrinsic pathway of apoptosis. Calpain and caspase-3 activities produced 145 kD spectrin break down product (SBDP) and 120 kD SBDP, respectively. Also, caspase-3 activity cleaved inhibitor of caspase-activated DNase (ICAD). Results strongly suggested that the garlic compounds DAS and DADS suppressed anti-apoptotic factors and activated calpain and intrinsic caspase cascade for apoptosis in SH-SY5Y cells.

 

Study Type : In Vitro Study
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