Abstract
Tissue transglutaminase (tTG) activity was used to test the potent regulatory role of vasoactive intestinal peptide (VIP) on Retinoic Acid-induced effect in human neuroblastoma cell line. The comparison between both differentiation and cell death related to tissue transglutaminase was discussed in this model. VIP alone was a potent differentiating agent in SK-N-SH cells but in the presence of retinoic acid (RA), this peptide rather potentiates RA-induced tTG activity which is now considered as an apoptosis marker in neuroblastoma cell line. This paper demonstrated an additional neuromodulator role for VIP.
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