Τίτλος:
Evidence for APOBEC3B mRNA and protein expression in oral squamous cell carcinomas
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
It has been demonstrated that APOBEC3B possesses cytidine deaminase activity, which is likely to result in C-to-T signature mutations. Increased expression of the APOBEC3B gene has been shown to correlate with higher incidence of such mutations in various cancer types, such as breast, bladder, lung, and head and neck carcinomas. In the current study, we used in silico methods, immunohistochemistry and qRT-PCR to detect the presence of APOBEC3B signature mutations and examine the levels and patterns of APOBEC3B expression in oral squamous cell carcinomas (OSCCs). Using the Cancer Genome Atlas (TCGA) database, we have found a high incidence of C-to-T transitions in head and neck squamous cell carcinomas (HNSCCs), of which OSCCs constitute the largest subgroup. Additionally, we compared APOBEC3B expression, at both mRNA and protein level, between OSCCs and non-cancerous samples. APOBEC3B was detected in both groups, but nuclear localization was consistent only in normal oral cells. APOBEC3B mRNA levels were clearly higher in OSCCs than in controls. These results suggest that while in normal oral cells APOBEC3B has an important nuclear function to fulfill, this activity may be hindered in a subgroup of tumor cells, due to the more prominent localization of the enzyme in the cytoplasm. © 2016 Elsevier Inc.
Συγγραφείς:
Fanourakis, G.
Tosios, K.
Papanikolaou, N.
Chatzistamou, I.
Xydous, M.
Tseleni-Balafouta, S.
Sklavounou, A.
Voutsinas, G.E.
Vastardis, H.
Περιοδικό:
Experimental and Molecular Pathology
Εκδότης:
Academic Press Inc.
Λέξεις-κλειδιά:
apolipoprotein B messenger RNA editing enzyme catalytic polypeptide 3B; hydrolase; messenger RNA; unclassified drug; APOBEC3B protein, human; cytidine deaminase; messenger RNA; minor histocompatibility antigen, adult; aged; APOBEC3B gene; Article; carcinogenesis; clinical article; computer model; controlled study; enzyme localization; female; gene; gene expression; gene location; gene mutation; genetic database; head and neck squamous cell carcinoma; human; human tissue; immunohistochemistry; incidence; male; middle aged; mouth squamous cell carcinoma; nucleic acid base substitution; protein expression; quantitative analysis; retrospective study; reverse transcription polymerase chain reaction; very elderly; active transport; cell nucleus; gene frequency; genetics; metabolism; mouth tumor; mutation; pathology; squamous cell carcinoma, Active Transport, Cell Nucleus; Adult; Aged; Carcinoma, Squamous Cell; Cell Nucleus; Cytidine Deaminase; Female; Gene Frequency; Humans; Male; Middle Aged; Minor Histocompatibility Antigens; Mouth Neoplasms; Mutation; RNA, Messenger
DOI:
10.1016/j.yexmp.2016.11.001
