TGM3 and head and neck squamous cell carcinoma: Wu et al. showed that ectopic TGM3 expression reduced the protein levels of full-length PARP, procaspase-3, procaspase-8, and the inhibitor of apoptosis Bcl-2 and increased the protein level of cleaved PARP and pro-apoptotic marker Bax in head and neck squamous cell carcinoma lines HN4, HN13, and HN30 [35].