Caspase-8 (CT) Blocking Peptide

16 amino acids near the carboxy-terminus of human Caspase-8 isoform A.

This peptide is formulated in PBS pH 7.2 (0.01 M Sodium Phosphate, 0.13 M NaCl) containing 0.1% bovine serum albumin and 0.02% sodium azide.

Store this peptide in working aliquots at -20°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles.

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16 amino acids near the carboxy terminus of human Caspase-8 isoform A.

Caspases are a family of cysteine proteases that can be divided into the apoptotic and inflammatory caspase subfamilies. Unlike the apoptotic caspases, members of the inflammatory subfamily are generally not involved in cell death but are associated with the immune response to microbial pathogens.^1,2 The apoptotic subfamily can be further divided into initiator caspases, which are activated in response to death signals, and executioner caspases, which are activated by the initiator caspases and are responsible for cleavage of cellular substrates that ultimately lead to cell death.³ Caspase-8 is an initiator caspase that was identified as a member of the Fas/APO-1 death-inducing signaling complex.⁴ The adaptor molecule FADD couples procaspase-8 to the Fas receptor death domain; subsequent oligomerization promotes procaspase-8 autoactivation.⁵ FLIP, a catalytically inactive caspase-8-like molecule inhibits these interactions and thus can inhibit apoptosis.⁶

caspase-8 presents a promising target to restore defective apoptosis programs in cancers in order to overcome resistance.

1. Gould LH and Fikrig E. West Nile virus: a growing concern. J. Clin. Invest. 2004; 113:1102-7. 2. Wengler G and Wengler G. Cell-associated West Nile flavivirus is covered with E+pre-M protein heterodimers which are destroyed and reorganized by proteolytic cleavage during virus release. J. Virol. 1989; 2521-6. 3. Chu JJ and Ng ML. Interaction of West Nile virus with α v β 3 integrin mediates virus entry into cells. J. Biol. Chem. 2004; 279:54533-41.