PMID- 27294001 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20160613 LR - 20201001 IS - 2156-6976 (Print) IS - 2156-6976 (Electronic) IS - 2156-6976 (Linking) VI - 6 IP - 5 DP - 2016 TI - Decreased 5-Hydroxymethylcytosine (5-hmC) predicts poor prognosis in early-stage laryngeal squamous cell carcinoma. PG - 1089-98 AB - Accumulating evidences suggest that large-scale loss of 5-hydroxymethylcytosine (5-hmC) is an epigenetic hallmark in different cancers. However, the levels of 5-hmC in laryngeal squamous cell carcinoma (LSCC) and its prognostic value in this cancer remain largely unknown. Using dot-blot and quantitative RT-PCR assays, we investigate 5-hmC levels and expression of TET-1, -2 and -3 in LSCCs and explore the association of 5-hmC levels with clinicopathological characteristics and clinical outcome of LSCC patients. Our data showed that 5-hmC was significantly decreased in LSCCs as compared with matched normal tissues. We also found a strong link between decreased 5-hmC and the reduction of TET-1 gene expression, but not TET-2 or -3, suggesting that decreased TET-1 expression was implicated in 5-hmC loss in LSCC. Moreover, Mann-Whitney U tests showed that 5-hmC content was significantly associated with smoking (P = 0.039) and tumor invasion (P = 0.004). Importantly, we found that decreased 5-hmC was significantly associated with poor survival of early-stage LSCC patients (P = 0.043). Altogether, our findings implicate that decreased 5-hmC probaly caused by the reduction of TET-1 is crucial to the clinical pathology of LSCC and is a poor prognostic factor in ealry-stage LSCC patients. FAU - Zhang, Yanfang AU - Zhang Y AD - Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061, The People's Republic of China; Department of Endocrinology, Luoyang Central Hospital Affiliated to Zhengzhou UniversityLuoyang 471009, The People's Republic of China. FAU - Wu, Kexia AU - Wu K AD - Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, The People's Republic of China. FAU - Shao, Yuan AU - Shao Y AD - Department of Otolaryngology, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, The People's Republic of China. FAU - Sui, Fang AU - Sui F AD - Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, The People's Republic of China. FAU - Yang, Qi AU - Yang Q AD - Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, The People's Republic of China. FAU - Shi, Bingyin AU - Shi B AD - Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, The People's Republic of China. FAU - Hou, Peng AU - Hou P AD - Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, The People's Republic of China. FAU - Ji, Meiju AU - Ji M AD - Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061, The People's Republic of China. LA - eng PT - Journal Article DEP - 20160501 PL - United States TA - Am J Cancer Res JT - American journal of cancer research JID - 101549944 PMC - PMC4889722 OTO - NOTNLM OT - 5-hydroxymethylcytosine (5-hmC) OT - Laryngeal squamous cell carcinoma (LSCC) OT - TET-1 OT - poor survival EDAT- 2016/06/14 06:00 MHDA- 2016/06/14 06:01 PMCR- 2016/05/01 CRDT- 2016/06/14 06:00 PHST- 2016/04/14 00:00 [received] PHST- 2016/04/18 00:00 [accepted] PHST- 2016/06/14 06:00 [entrez] PHST- 2016/06/14 06:00 [pubmed] PHST- 2016/06/14 06:01 [medline] PHST- 2016/05/01 00:00 [pmc-release] PST - epublish SO - Am J Cancer Res. 2016 May 1;6(5):1089-98. eCollection 2016.