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Huo X, Feng D, Zhang S, Li Z, Li X, Li C, Guo M, Wang J, Zhang Z, Lu Q, Du X, Bai Z, Chen Z. Characterization and clinical evaluation of microsatellite instability and loss of heterozygosity within tumor-related genes in colorectal cancer. BMC Med Genomics 2021; 14:235. [PMID: 34563193 PMCID: PMC8466986 DOI: 10.1186/s12920-021-01051-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 08/05/2021] [Indexed: 11/30/2022] Open
Abstract
Background Microsatellite instability (MSI) is a biomarker for better outcomes in colorectal cancer (CRC). However, this conclusion is controversial. In addition, MSs can be a useful marker for loss of heterozygosity (LOH) of genes, but this finding has not been well studied. Here, we aimed to clarify the predictive value of MSI/LOH within tumor-related genes in CRC. Methods We detected MSI/LOH of MSs in tumor-related genes and the Bethesda (B5) panel by STR scanning and cloning/sequencing. We further analyzed the relationship between MSI/LOH status and clinical features or outcomes by Pearson’s Chi-square test, Fisher’s exact test and the Kaplan–Meier method. Results The findings indicated that the MSI rates of B5 loci were all higher than those of loci in tumor-related genes. Interestingly, MSI/LOH of 2 loci in the B5 panel and 12 loci in tumor-related genes were associated with poorer outcomes, while MSI/LOH of the B5 panel failed to predict outcomes in CRC. MSI of BAT25, MSI/LOH of BAT26 and MSI of the B5 panel showed closer relationships with mucinous carcinoma. In addition, LOH-H of the B5 panel was associated with increased lymphatic metastasis. Conclusions In summary, MSI/LOH of certain loci or the whole panel of B5 is related to clinical features, and several loci within tumor-related genes showed prognostic value in the outcomes of CRC. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-021-01051-5.
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Affiliation(s)
- Xueyun Huo
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China
| | - Dandan Feng
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China
| | - Shuangyue Zhang
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences and Comparative Medicine Center, Peking Union Medical Collage, Beijing, 100021 , China
| | - Zhenkun Li
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China
| | - Xiaohong Li
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China
| | - Changlong Li
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China
| | - Meng Guo
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China
| | - Jin Wang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing, 100050, China
| | - Zhongtao Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing, 100050, China
| | - Qingxian Lu
- Department of Ophthalmology and Visual Sciences, University of Louisville School of Medicine, Louisville, KY, 40202, USA
| | - Xiaoyan Du
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China
| | - Zhigang Bai
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing, 100050, China.
| | - Zhenwen Chen
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, 100069, China.
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Liu X, Liu Y, Cao Q, Wu Y, Huo X, Du X, Chen Z. Impact of age on N-methyl-N-nitrosourea induced microsatellite instability in young and old C57BL/6J mice. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2020; 853:503189. [PMID: 32522351 DOI: 10.1016/j.mrgentox.2020.503189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 03/20/2020] [Accepted: 03/27/2020] [Indexed: 10/24/2022]
Abstract
Age is an important factor in the evaluation of chemical toxicology. Chemical carcinogenic compounds can induce genomic mutations. However, few studies have been conducted on the association between genomic mutation frequency, such as microsatellite instability (MSI), and the age of mice treated with a nitrosourea mutagen. In the current work, we treated young (6 weeks) and old (10 months) mice with N-methyl-N-nitrosourea (MNU) for 4 months; the MSI frequency was then measured using polymerase chain reaction (PCR) and short tandem repeat (STR) scanning. The percentage of animals with MSI in the old group was significantly higher than that in the young group (100% and 75%). The frequency of MSI events was significantly different between the two groups as well (15.8% for old and 9.4% for young). The ratio of MSI loci displayed no obvious difference between the two groups. In addition, a few loci, including D15Mit5 and D8Mit14 exhibited the highest frequency of MSI events. Since specific loci showed increased MSI in the present study and a higher frequency in previous studies, these loci could be regarded as "hot spot". These results suggested that old mice would be more susceptible to this mutagen, and prone to accrue MSI. The hot spot microsatellite loci are potentially useful markers for genomic instability analysis.
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Affiliation(s)
- Xingchen Liu
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing 100069, China
| | - Yihan Liu
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing 100069, China
| | - Qi Cao
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing 100069, China
| | - Ying Wu
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing 100069, China
| | - Xueyun Huo
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing 100069, China
| | - Xiaoyan Du
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing 100069, China.
| | - Zhenwen Chen
- School of Basic Medical Sciences, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing 100069, China
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Du X, Wang D, Li Y, Huo X, Li C, Lu J, Wang Y, Guo M, Chen Z. Newly breeding an inbred strain of ischemia-prone Mongolian gerbils and its reproduction and genetic characteristics. Exp Anim 2017; 67:83-90. [PMID: 29046492 PMCID: PMC5814317 DOI: 10.1538/expanim.17-0071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
The Mongolian gerbil has been a useful laboratory animal in many research fields,
especially in ischemia studies. However, due to the variation of the circle of Willis
(COW), the ischemic model is unstable and various. To solve this problem, we newly
established an inbred strain of gerbils, restricting breeding and keeping to
F23. The data on the breeding and growth of the animals are described in the
present study. The genetic characteristics of F4 to F20 detected by
microsatellite DNA and biochemical markers are also shown here. The results demonstrated
that the frequency of ischemic model by unilateral carotid occlusion and the frequency of
incomplete COW increased, increasing from 50% and 75% in F1 to 88.89% and 100%
in F20, respectively. The ratios of consistent patterns of COW in parents were
positively related with the number of inbred generations. A reproductive performance
analysis indicated that the average size of litters in the inbred gerbils was less than
that of outbred gerbils and that adult body weight was also lower in inbred gerbils; also,
the pups in the 2nd litter were the best ones chosen to reproduce. The genetic detection
results indicated that 26 out of 28 microsatellite loci and all 26 biochemical markers
were homozygous in F20, showing comparably identical genetic composition in
inbred gerbils. All the data demonstrated that an inbred strain of ischemia-prone gerbil
has been established successfully. This strain can be used in stroke research and can
largely reduce the number of animals needed in experiments.
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Affiliation(s)
- Xiaoyan Du
- School of Basic Medical Sciences, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China.,Department of Laboratory Animal, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China
| | - Dongping Wang
- Institute of Jingfeng Medical Laboratory Animals, No. 20 Dongdajie, Fengtai District, Beijing 100071, P.R. China
| | - Ying Li
- Institute of Jingfeng Medical Laboratory Animals, No. 20 Dongdajie, Fengtai District, Beijing 100071, P.R. China.,Animal Science and Technology College, Jilin Agricultural University, No. 2888 Xin Cheng Da Jie, Changchun 130118, P.R. China
| | - Xueyun Huo
- School of Basic Medical Sciences, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China
| | - Changlong Li
- School of Basic Medical Sciences, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China
| | - Jing Lu
- School of Basic Medical Sciences, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China
| | - Ying Wang
- School of Basic Medical Sciences, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China.,Department of Laboratory Animal, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China
| | - Meng Guo
- School of Basic Medical Sciences, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China.,Department of Laboratory Animal, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China
| | - Zhenwen Chen
- School of Basic Medical Sciences, Capital Medical University, No.10 Xitoutiao, Youanmen, Fengtai District, Beijing 100069, P.R. China
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