Experimental chronic jet lag promotes growth and lung metastasis of Lewis lung carcinoma in C57BL/6 mice. 2012

Mingwei Wu, and Jing Zeng, and Yanfeng Chen, and Zhaolei Zeng, and Jinxin Zhang, and Yuchen Cai, and Yanli Ye, and Liwu Fu, and Lijian Xian, and Zhongping Chen
State Key Laboratory of Oncology in South China, Department of Research, Cancer Center, Sun Yat-Sen University, Guangzhou, Guangdong, PR China. wumw@mail.sysu.edu.cn

Circadian rhythm has been linked to cancer genesis and development, but the detailed mechanism by which circadian disruption accelerates tumor growth remains unclear. The purpose of this study was to investigate the effect of circadian disruption on tumor growth and metastasis in male C57BL/6 mice, using an experimental chronic jet lag model. Lewis lung carcinoma cells were inoculated into both flanks of the mice following 10 days of exposure to experimental chronic jet lag or control conditions. The effects on tumor growth and lung metastasis were assessed, and the effect on gene expression was detected using cDNA microarrays and real-time quantitative RT-PCR. Tumors grew faster in the experimental chronic jet lag mice compared to the control mice (P=0.004). Lung metastases were found in 10 out of 24 mice in the chronic jet lag group, but only in 3 out of 24 mice in the LD group (P=0.023). Microarray data showed that in both liver and tumors circadian disruption altered the expression of genes, including those related to the cell cycle, apoptosis, the immune response and metastasis suppressor genes. The expression of the Ndrg1 gene was suppressed by chronic jet lag. We conclude that circadian disruption can promote tumor progression and metastasis by affecting the expression of both tumor-related genes and metastasis suppressor genes.

UI MeSH Term Description Entries
D008297 Male Males
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D009362 Neoplasm Metastasis The transfer of a neoplasm from one organ or part of the body to another remote from the primary site. Metastase,Metastasis,Metastases, Neoplasm,Metastasis, Neoplasm,Neoplasm Metastases,Metastases
D001831 Body Temperature The measure of the level of heat of a human or animal. Organ Temperature,Body Temperatures,Organ Temperatures,Temperature, Body,Temperature, Organ,Temperatures, Body,Temperatures, Organ
D005786 Gene Expression Regulation Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation. Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D018827 Carcinoma, Lewis Lung A carcinoma discovered by Dr. Margaret R. Lewis of the Wistar Institute in 1951. This tumor originated spontaneously as a carcinoma of the lung of a C57BL mouse. The tumor does not appear to be grossly hemorrhagic and the majority of the tumor tissue is a semifirm homogeneous mass. (From Cancer Chemother Rep 2 1972 Nov;(3)1:325) It is also called 3LL and LLC and is used as a transplantable malignancy. Lewis Lung Carcinoma,Lung Carcinoma, Lewis
D020179 Jet Lag Syndrome A chronobiologic disorder resulting from rapid travel across a number of time zones, characterized by insomnia or hypersomnolence, fatigue, behavioral symptoms, headaches, and gastrointestinal disturbances. (From Cooper, Sleep, 1994, pp593-8) Time Zone Change Syndrome,Jet Lag,Time Zone Syndrome,Jet Lag Syndromes,Jet Lags,Lag, Jet,Lags, Jet,Time Zone Syndromes
D020869 Gene Expression Profiling The determination of the pattern of genes expressed at the level of GENETIC TRANSCRIPTION, under specific circumstances or in a specific cell. Gene Expression Analysis,Gene Expression Pattern Analysis,Transcript Expression Analysis,Transcriptome Profiling,Transcriptomics,mRNA Differential Display,Gene Expression Monitoring,Transcriptome Analysis,Analyses, Gene Expression,Analyses, Transcript Expression,Analyses, Transcriptome,Analysis, Gene Expression,Analysis, Transcript Expression,Analysis, Transcriptome,Differential Display, mRNA,Differential Displays, mRNA,Expression Analyses, Gene,Expression Analysis, Gene,Gene Expression Analyses,Gene Expression Monitorings,Gene Expression Profilings,Monitoring, Gene Expression,Monitorings, Gene Expression,Profiling, Gene Expression,Profiling, Transcriptome,Profilings, Gene Expression,Profilings, Transcriptome,Transcript Expression Analyses,Transcriptome Analyses,Transcriptome Profilings,mRNA Differential Displays

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