Fatty Acid Synthase-associated Protein with Death Domain: a Prognostic Factor for Survival in Patients with Nasopharyngeal Carcinoma

Fatty acid synthase-associated protein with death domain (FADD) is a key adaptor protein that bridges a death receptor (eg, death receptor 5) to caspase 8 to form the death-inducing signaling complex during apoptosis. The expression and prognostic impact of FADD in nasopharyngeal carcinoma (NPC) have not been well studied. This study focused on detecting FADD expression and analyzing its prognostic impact on NPC. FADD expression was assessed on pretreatment tumor tissues of 248 cases of NPC patients and 76 cases of noncancerous nasopharyngeal control tissue. The results showed that the positive percentage of FADD expression in NPC (63.7%, 158/248) was significantly higher than that in the noncancerous nasopharyngeal control tissues (28.9%, 22/76) (P < .0001). The positive expression of FADD in the NPC with cervical lymph node metastasis was significantly higher than those without lymph node metastasis (P = .009). Furthermore, FADD expression was more pronouncedly increased in metastatic NPC than the matched primary NPC tissues (P = .017). Both univariate and multivariate survival analysis indicated that increased FADD expression was significantly correlated inversely with overall survival in NPC patients (P = .003 and P = .007, respectively). Taken together, high expression of FADD may be an independent biomarker for poor prognosis in NPC.