Cheng-Ming Hsu1, Pai-Mei Lin, Chi-Chih Lai, Hsin-Ching Lin, Sheng-Fung Lin, Ming-Yu Yang. 1. Division of Laryngology, Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan.
Abstract
BACKGROUND: Circadian clock regulates daily rhythms in various physiologic processes and deregulated circadian clock are linked to cancers. We have previously demonstrated the association between altered circadian clock genes (CCGs) and head and neck squamous cell carcinoma (HNSCC). The purpose of this study was to investigate whether the CCGs were also altered in peripheral blood (PB) of patients with HNSCC. METHODS: The 9 CCGs expression profiles of PB leukocytes from 94 patients with HNSCC and 56 healthy individuals were investigated using real-time quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) and immunocytochemistry. RESULTS: All the 9 CCGs were significantly downregulated in the PB of preoperative patients (p < .0001). Recovery of PER1 and CLOCK expression was observed in postoperative patients with good prognosis but not in patients that died within 1 year after surgery. CONCLUSION: CCGs were also altered in PB leukocytes of patients with HNSCC and PER1 and CLOCK are potential circulating prognostic markers for HNSCC.
BACKGROUND: Circadian clock regulates daily rhythms in various physiologic processes and deregulated circadian clock are linked to cancers. We have previously demonstrated the association between altered circadian clock genes (CCGs) and head and neck squamous cell carcinoma (HNSCC). The purpose of this study was to investigate whether the CCGs were also altered in peripheral blood (PB) of patients with HNSCC. METHODS: The 9 CCGs expression profiles of PB leukocytes from 94 patients with HNSCC and 56 healthy individuals were investigated using real-time quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) and immunocytochemistry. RESULTS: All the 9 CCGs were significantly downregulated in the PB of preoperative patients (p < .0001). Recovery of PER1 and CLOCK expression was observed in postoperative patients with good prognosis but not in patients that died within 1 year after surgery. CONCLUSION: CCGs were also altered in PB leukocytes of patients with HNSCC and PER1 and CLOCK are potential circulating prognostic markers for HNSCC.