1
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Hernandez JC, Chen CL, Machida T, Uthaya Kumar DB, Tahara SM, Montana J, Sher L, Liang J, Jung JU, Tsukamoto H, Machida K. LIN28 and histone H3K4 methylase induce TLR4 to generate tumor-initiating stem-like cells. iScience 2023; 26:106254. [PMID: 36949755 PMCID: PMC10025994 DOI: 10.1016/j.isci.2023.106254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 01/09/2022] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
Chemoresistance and plasticity of tumor-initiating stem-like cells (TICs) promote tumor recurrence and metastasis. The gut-originating endotoxin-TLR4-NANOG oncogenic axis is responsible for the genesis of TICs. This study investigated mechanisms as to how TICs arise through transcriptional, epigenetic, and post-transcriptional activation of oncogenic TLR4 pathways. Here, we expressed constitutively active TLR4 (caTLR4) in mice carrying pLAP-tTA or pAlb-tTA, under a tetracycline withdrawal-inducible system. Liver progenitor cell induction accelerated liver tumor development in caTLR4-expressing mice. Lentiviral shRNA library screening identified histone H3K4 methylase SETD7 as central to activation of TLR4. SETD7 combined with hypoxia induced TLR4 through HIF2 and NOTCH. LIN28 post-transcriptionally stabilized TLR4 mRNA via de-repression of let-7 microRNA. These results supported a LIN28-TLR4 pathway for the development of HCCs in a hypoxic microenvironment. These findings not only advance our understanding of molecular mechanisms responsible for TIC generation in HCC, but also represent new therapeutic targets for the treatment of HCC.
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Affiliation(s)
- Juan Carlos Hernandez
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
- MS Biotechnology Program, California State University Channel Islands, Camarillo, CA 93012, USA
| | - Chia-Lin Chen
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
- Department of Life Sciences & Institute of Genome Sciences, National Yang Ming Chiao Tung University, Taipei 110, Taiwan
| | - Tatsuya Machida
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
| | - Dinesh Babu Uthaya Kumar
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
| | - Stanley M. Tahara
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
| | - Jared Montana
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
| | - Linda Sher
- Department of Surgery, University of Southern California, Los Angeles, CA 90033, USA
| | | | - Jae U. Jung
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
| | - Hidekazu Tsukamoto
- Department of Pathology, University of Southern California, Los Angeles, CA 90033, USA
- Southern California Research Center for ALPD and Cirrhosis, Los Angeles, CA, USA
- Department of Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, USA
| | - Keigo Machida
- Departments of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA 90033, USA
- Southern California Research Center for ALPD and Cirrhosis, Los Angeles, CA, USA
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2
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Yang Z, Deng Y, Zhang K, Bai Y, Zhu J, Zhang J, Cheng J, Li L, He J, Wang W. LIN28A polymorphisms and hepatoblastoma susceptibility in Chinese children. J Cancer 2021; 12:1373-1378. [PMID: 33531982 PMCID: PMC7847658 DOI: 10.7150/jca.52621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 12/07/2020] [Indexed: 02/07/2023] Open
Abstract
Hepatoblastoma (HB) is the most prevalent primary hepatic cancer in children aged 6 months to 3 years. LIN28A is recurrently mutated in various diseases, and critically involved in tumorigenesis. However, a limited number of studies have examined the involvement of LIN28A polymorphisms in HB risk. We used the TaqMan assay to genotype four LIN28A polymorphisms (rs3811464 G>A, rs3811463 T>C, rs34787247 G>A, and rs11247957 G>A) in 275 Chinese children with HB and 1018 cancer-free controls from five medical centers in China. Their association with HB risk was evaluated on the basis of odds ratio (OR) and corresponding 95% confidence interval (CI). Overall, no significant associations were found in single locus and combine analysis. Interestingly, in the stratified analysis, we found that subjects with 1-3 risk genotypes were more likely to develop HB in patients ≥17 months of age (adjusted OR=1.76, 95% CI=1.04-2.98, P=0.034). The rs3811464 GA/AA genotypes were associated with decrease HB risk in patients with clinical stage III+IV disease (adjusted OR=0.50, 95% CI=0.26-0.96, P=0.038). Our results suggest that the LIN28A polymorphisms have a weak association with HB susceptibility in the Chinese children. LIN28A rs3811464 G>A may decrease HB risk in stage III+IV patients which need further validations with larger samples and different ethnicities.
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Affiliation(s)
- Zhonghua Yang
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Yuyao Deng
- Department of Clinical Medicine, The Fourth Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning, China
| | - Keren Zhang
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Yuzuo Bai
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
| | - Jinhong Zhu
- Department of Clinical Laboratory, Biobank, Harbin Medical University Cancer Hospital, Harbin 150040, Heilongjiang, China
| | - Jiao Zhang
- Department of Pediatric Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Jiwen Cheng
- Department of Pediatric Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, Shaanxi, China
| | - Li Li
- Kunming Key Laboratory of Children Infection and Immunity, Yunnan Key Laboratory of Children's Major Disease Research, Yunnan Institute of Pediatrics Research, Yunnan Medical Center for Pediatric Diseases, Kunming Children's Hospital, Kunming 650228, Yunnan, China
| | - Jing He
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
- ✉ Corresponding author: Weilin Wang, Department of Pediatric Surgery, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang110004, Liaoning, China, ; or Jing He, Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou 510623, Guangdong, China,
| | - Weilin Wang
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China
- ✉ Corresponding author: Weilin Wang, Department of Pediatric Surgery, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang110004, Liaoning, China, ; or Jing He, Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou 510623, Guangdong, China,
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3
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Hypoxia induces an endometrial cancer stem-like cell phenotype via HIF-dependent demethylation of SOX2 mRNA. Oncogenesis 2020; 9:81. [PMID: 32913192 PMCID: PMC7484801 DOI: 10.1038/s41389-020-00265-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 07/31/2020] [Accepted: 08/21/2020] [Indexed: 12/20/2022] Open
Abstract
Endometrial cancer stem cells (ECSCs) are stem-like cells endowed with self-renewal and differentiation abilities, and these cells are essential for cancer progression in endometrial cancer (EC). As hallmarks of the tumour microenvironment (TME), hypoxia and hypoxia-inducing factors (HIFs) give rise to the dysregulation of tumour stemness genes, such as SOX2. Against this backdrop, we investigated the regulatory mechanisms regulated by HIFs and SOX2 in ECSCs during EC development. Here, ECSCs isolated from EC cell lines and tissues were found to express stemness genes (CD133 and aldehyde dehydrogenase, ALDH1) following the induction of their ECSC expansion. Notably, m6A methylation of RNA and HIF-1α/2α-dependent AlkB homologue 5 (ALKBH5) participate in the regulation of HIFs and SOX2 in EC, as confirmed by the observations that mRNA levels of m6A demethylases and ALKBH5 significantly increase under hypoxic conditions in ECSCs. Moreover, hypoxia and high ALKBH5 levels restore the stem-like state of differentiated ECSCs and increase the ECSC-like phenotype, whereas the knockdown of HIFs or ALKBH5 significantly reduces their tumour initiation capacity. In addition, our findings validate the role of ALKBH5 in promoting SOX2 transcription via mRNA demethylation, thereby maintaining the stem-like state and tumorigenicity potential of ECSCs. In conclusion, these observations demonstrate a critical role for m6A methylation-mediated regulation of the HIF-ALKBH5-SOX2 axis during ECSC expansion in hypoxic TMEs.
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Cao G, Gao Z, Jiang Y, Chu M. Lin28 gene and mammalian puberty. Mol Reprod Dev 2020; 87:525-533. [PMID: 32363678 DOI: 10.1002/mrd.23347] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 04/21/2020] [Indexed: 11/10/2022]
Abstract
Lin28a and Lin28b, homologs of the Caenorhabditis elegans Lin28 gene, play important roles in cell pluripotency, reprogramming, and tumorigenicity. Recently, genome-wide association and transgenic studies showed that Lin28a and/or Lin28b gene were involved in the onset of mammalian puberty, the stage representing the attainment of reproduction capacity; however, the detailed mechanism of these genes in mammalian puberty remains largely unknown. The present paper reviews the research progress on the roles of Lin28a/b genes in the onset of mammalian puberty by analyzing the results coming from gene expression patterns, mutations, and transgenic studies, and put forward possible pathways for further studies on their roles in animal reproduction.
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Affiliation(s)
- Guiling Cao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, China.,College of Agriculture, Liaocheng University, Liaocheng, China
| | - Zeyang Gao
- College of Agriculture, Liaocheng University, Liaocheng, China
| | - Yunliang Jiang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, China
| | - Mingxing Chu
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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5
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Hua R, Zhuo Z, Ge L, Zhu J, Yuan L, Chen C, Liu J, Cheng J, Zhou H, Zhang J, Xia H, Zhang X, He J. LIN28A gene polymorphisms modify neuroblastoma susceptibility: A four-centre case-control study. J Cell Mol Med 2020; 24:1059-1066. [PMID: 31747721 PMCID: PMC6933387 DOI: 10.1111/jcmm.14827] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/15/2019] [Accepted: 10/28/2019] [Indexed: 02/05/2023] Open
Abstract
Neuroblastoma ranks the most common seen solid tumour in childhood. Overexpression of LIN28A gene has been linked to the development of multiple human malignancies, but the relationship between LIN28A single nucleotide polymorphisms (SNPs) and neuroblastoma susceptibility is still under debate. Herein, we evaluated the correlation of four potentially functional LIN28A SNPs (rs3811464 G>A, rs3811463 T>C, rs34787247 G>A, and rs11247957 G>A) and neuroblastoma susceptibility in 505 neuroblastoma patients and 1070 controls from four independent hospitals in China. The correlation strengths were determined by using odds ratios (ORs) and corresponding 95% confidence intervals (CIs). Among these SNPs, rs34787247 G>A exhibited a significant association with increased susceptibility in neuroblastoma (GA vs GG: adjusted OR = 1.30, 95% CI = 1.03-1.64; AA vs GG: adjusted OR = 2.51, 95% CI = 1.36-4.64, AA/GA vs GG: adjusted OR = 1.42, 95% CI = 1.12-1.80, AA vs GG/GA: adjusted OR = 2.39, 95% CI = 1.29-4.42). Furthermore, the combined analysis of risk genotypes revealed that subjects carrying three risk genotypes (adjusted OR = 1.64, 95% CI = 1.02-2.63) are more inclined to develop neuroblastoma than those without risk genotype, and so do carriers of 1-4 risk genotypes (adjusted OR = 1.26, 95% CI = 1.01-1.56). Stratification analysis further revealed risk effect of rs3811464 G>A, rs34787247 G>A and 1-4 risk genotypes in some subgroups. Haplotype analysis of these four SNPs yields two haplotypes significantly correlated with increased neuroblastoma susceptibility. Overall, our finding indicated that LIN28A SNPs, especially rs34787247 G>A, may increase neuroblastoma risk.
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Affiliation(s)
- Rui‐Xi Hua
- Department of Pediatric SurgeryGuangzhou Institute of PediatricsGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangzhouChina
- Department of OncologyThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina
| | - Zhenjian Zhuo
- Department of Pediatric SurgeryGuangzhou Institute of PediatricsGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangzhouChina
| | - Lili Ge
- Henan Provincial Key Laboratory of Children's Genetics and Metabolic DiseasesChildren's Hospital Affiliated to Zhengzhou UniversityHenan Children's HospitalZhengzhou Children's HospitalZhengzhouChina
| | - Jinhong Zhu
- Department of Pediatric SurgeryGuangzhou Institute of PediatricsGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangzhouChina
- Department of Clinical LaboratoryBiobankHarbin Medical University Cancer HospitalHarbinChina
| | - Li Yuan
- Department of Pediatric SurgeryGuangzhou Institute of PediatricsGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangzhouChina
| | - Chongfen Chen
- Henan Provincial Key Laboratory of Children's Genetics and Metabolic DiseasesChildren's Hospital Affiliated to Zhengzhou UniversityHenan Children's HospitalZhengzhou Children's HospitalZhengzhouChina
| | - Jing Liu
- Henan Provincial Key Laboratory of Children's Genetics and Metabolic DiseasesChildren's Hospital Affiliated to Zhengzhou UniversityHenan Children's HospitalZhengzhou Children's HospitalZhengzhouChina
| | - Jiwen Cheng
- Department of Pediatric SurgeryThe Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Haixia Zhou
- Department of HematologyThe Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhouChina
| | - Jiao Zhang
- Department of Pediatric SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Huimin Xia
- Department of Pediatric SurgeryGuangzhou Institute of PediatricsGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangzhouChina
| | - Xianwei Zhang
- Department of Pediatric Oncologic SurgeryChildren's Hospital Affiliated to Zhengzhou UniversityHenan Children's HospitalZhengzhou Children's HospitalZhengzhouChina
| | - Jing He
- Department of Pediatric SurgeryGuangzhou Institute of PediatricsGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangzhouChina
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6
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Tian N, Shangguan W, Zhou Z, Yao Y, Fan C, Cai L. Lin28b is involved in curcumin-reversed paclitaxel chemoresistance and associated with poor prognosis in hepatocellular carcinoma. J Cancer 2019; 10:6074-6087. [PMID: 31762817 PMCID: PMC6856568 DOI: 10.7150/jca.33421] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 08/24/2019] [Indexed: 12/11/2022] Open
Abstract
Chemoresistance remains a big challenge in hepatocellular carcinoma (HCC) treatment. Several studies indicated that RNA-binding protein Lin28B serves an oncogenic role in HCC, but its activity in HCC chemotherapy has never been assessed. In this study, we found that overexpression of Lin28B significantly increased the paclitaxel chemoresistance in two different HCC cells lines while silencing Lin28B reduced the chemoresistance in paclitaxel-resistance HCC cells. Curcumin, a natural anti-cancer agent, increased the sensitivity of HCC cells to paclitaxel through inhibiting NF-κB stimulated Lin28B expression both in vitro and in vivo. Furthermore, by analyzing TCGA (The Cancer Genome Atlas) LIHC (liver hepatocellular carcinoma) and GSE14520 databases, we found that Lin28B was highly upregulated in HCC tissue compared with that in normal tissue and associated with α‑fetoprotein levels, and that patients with Lin28B higher expression had a significant shorter overall survival time than those with Lin28B lower expression. Our data reveal that Lin28B may serve as a predictive biomarker and a treatment target to reverse HCC chemotherapy resistance in future clinical practice.
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Affiliation(s)
- Nan Tian
- Institute of Molecular Medicine, Life Science College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Wenbing Shangguan
- Institute of Molecular Medicine, Life Science College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Zuolin Zhou
- Institute of Molecular Medicine, Life Science College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Yao Yao
- Institute of Molecular Medicine, Life Science College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Chunlei Fan
- Institute of Molecular Medicine, Life Science College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Lijun Cai
- Department of gastroenterology, the First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
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7
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Mosallaei M, Simonian M, Esmaeilzadeh E, Bagheri H, Miraghajani M, Salehi AR, Mehrzad V, Salehi R. Single nucleotide polymorphism rs10889677 in miRNAs Let-7e and Let-7f binding site of IL23R gene is a strong colorectal cancer determinant: Report and meta-analysis. Cancer Genet 2019; 239:46-53. [PMID: 31546198 DOI: 10.1016/j.cancergen.2019.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 08/11/2019] [Accepted: 09/15/2019] [Indexed: 12/13/2022]
Abstract
Single nucleotide polymorphisms (SNPs) in the recognition sites of microRNAs (miRNAs), located at 3' untranslated region (UTR) of mRNAs, interfere with posttranslational gene regulation. Deregulation of genes may contribute to some disease susceptibility including colorectal cancer (CRC). In the present study, in a case-control setup, 167 CRC patients and 161 control subjects were studied for allele and genotype frequency of rs10889677 polymorphism in miRNAs Let-7e and Let-7f binding sites at 3' UTR of IL23R gene using PCR-RFLP assay. Also, related articles were retrieved from MEDLINE, Cochrane review, Google Scholar and Scopus databases for meta-analysis study. According to our results, AA genotype of SNP rs10889677 was significantly correlated with increased risk of CRC (OR = 3.10; 95% CI [1.86-5.18]; P: < 0.001). In a meta-analysis on 10 risk estimates for the CC versus AA genotype, we found an inverse association between CC SNPs and risk of all cancer (OR = 0.59; 95% CI [0.49-0.71]; P < 0.001). In conclusion, our results demonstrate that rs10889677 polymorphism is significantly associated with CRC risk.
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Affiliation(s)
- Meysam Mosallaei
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Miganoosh Simonian
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Emran Esmaeilzadeh
- Neuroscience Research Center, Iran University of Medical Science, Tehran, Iran
| | - Hadi Bagheri
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Maryam Miraghajani
- Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ahmad Reza Salehi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Valiollah Mehrzad
- Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Rasoul Salehi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran; Gerfa Namayesh Azmayesh (GENAZMA) Science & Research Institute, Isfahan, Iran.
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8
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Chen WC, Wei CK, Lee JC. MicroRNA-let-7c suppresses hepatitis C virus replication by targeting Bach1 for induction of haem oxygenase-1 expression. J Viral Hepat 2019; 26:655-665. [PMID: 30706605 DOI: 10.1111/jvh.13072] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 12/17/2018] [Accepted: 01/05/2019] [Indexed: 12/26/2022]
Abstract
MicroRNAs are small noncoding RNAs that are central factors between hepatitis C virus (HCV) and host cellular factors for viral replication and liver disease progression, including liver fibrosis, cirrhosis and hepatocellular carcinoma. In the present study, we found that overexpressing miR-let-7c markedly reduced HCV replication because it induced haem oxygenase-1 (HO-1) expression by targeting HO-1 transcriptional repressor Bach1, ultimately leading to stimulating an antiviral interferon response and blockade of HCV viral protease activity. In contrast, the antiviral actions of miR-let-7c were attenuated by miR-let-7c inhibitor treatment, exogenously expressing Bach1 or suppressing HO-1 activity and expression. A proposed model indicates a key role for miR-let-7c targeting Bach1 to transactivate HO-1-mediated antiviral actions against HCV. miR-let-7c may serve as an attractive target for antiviral development.
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Affiliation(s)
- Wei-Chun Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Ku Wei
- Department of Biotechnology, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jin-Ching Lee
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Biotechnology, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan.,PhD Program in Life Sciences, College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
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9
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Wu J, Feng X, Du Y, Luan B, Yu H, Yu Y, Wu L, Zhao H. β-catenin/LIN28B promotes the proliferation of human choriocarcinoma cells via Let-7a repression. Acta Biochim Biophys Sin (Shanghai) 2019; 51:455-462. [PMID: 30958882 DOI: 10.1093/abbs/gmz027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 02/27/2019] [Accepted: 03/02/2019] [Indexed: 01/03/2023] Open
Abstract
Choriocarcinoma is a rare and malignant trophoblastic tumor. However, the molecular mechanisms by which choriocarcinoma is regulated remain unknown. In the present study, we first elucidated that LIN28B was highly expressed in human choriocarcinoma tissues and choriocarcinoma cell lines. Our data further demonstrated that knockdown of LIN28B by small interfering RNA caused an increase in Let-7a expression in JAR cells. In addition, silencing of LIN28B inhibited IGF2BP1 expression and suppressed cell proliferation capacity, both of which can be markedly restored by Let-7a inhibitor. In contrast, LIN28B over-expression-improved cell proliferation was inhibited by Let-7a mimic. Knockdown of β-catenin resulted in reduced expression of LIN28B and increased expression of Let-7a. Knockdown of β-catenin also caused a decrease in cell proliferation, which can be recovered by re-expression of LIN28B or by Let-7a inhibitor. Collectively, our data indicate that β-catenin/LIN28B/Let-7a pathway may be crucial for the regulation of cell proliferation in human choriocarcinoma cells.
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Affiliation(s)
- Jing Wu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Xuan Feng
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Yan Du
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
| | - Baoxin Luan
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Huandi Yu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Yinhua Yu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
| | - Lanxiang Wu
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Hongbo Zhao
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, China
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10
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Jia ZF, Cao DH, Wu YH, Jin MS, Pan YC, Cao XY, Jiang J. Lethal-7-related polymorphisms are associated with susceptibility to and prognosis of gastric cancer. World J Gastroenterol 2019; 25:1012-1023. [PMID: 30833806 PMCID: PMC6397727 DOI: 10.3748/wjg.v25.i8.1012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/18/2019] [Accepted: 01/26/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The lethal-7 (let-7) family members and their targets are involved in the development and progression of tumors. Let-7-related polymorphisms have been reported to be associated with tumorigenesis and prognosis. In gastric cancer, however, the related studies are limited.
AIM To investigate the role of let-7-related microRNA polymorphisms in the tumorigenesis and prognosis of gastric cancer in a Chinese population.
METHODS A total of 898 gastric cancer patients and 992 tumor-free controls were recruited into this study from 2008 to 2013. Gastric cancer patients were followed periodically. Ten single nucleotide polymorphisms (SNPs) in the let-7 gene region or their target mRNAs were genotyped using the MassARRAY system and their associations with the risk for or overall survival of gastric cancer were analyzed.
RESULTS All the ten SNPs were in Hardy-Weinberg equilibrium. The C allele of the rs3811463 polymorphism in the 3’-untranslated region (UTR) of LIN28A was associated with a lower risk of gastric cancer [odds ratio (OR) = 0.74, 95% confidence interval (CI): 0.61-0.88, P = 0.001] after adjustment for age and Helicobacter pylori status. Seven hundred and thirty-five gastric cancer patients who had undergone radical tumorectomy were included in the survival analysis and their 5-year survival rate was 53.9% (95%CI: 50.1%-57.6%). The rs10889677 in the 3’-UTR of IL23R was corresponded to the prognosis of gastric cancer in a dose-response manner, in which the death risk increased by 25% [hazard ratio (HR) = 1.25, 95%CI: 1.04-1.45, P = 0.011] with each increase in the number of C alleles after controlling for other potential clinicopathological parameters.
CONCLUSION The let-7-related polymorphism rs3811463 in LIN28A is associated with the susceptibility to gastric cancer and the let-7-related polymorphism rs10889677 in IL23R is associated with the prognosis of gastric cancer.
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Affiliation(s)
- Zhi-Fang Jia
- Division of Clinical Research, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Dong-Hui Cao
- Division of Clinical Research, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Yan-Hua Wu
- Division of Clinical Research, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Mei-Shan Jin
- Division of Pathology, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Yu-Chen Pan
- Division of Clinical Research, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Xue-Yuan Cao
- Department of Gastrointestinal Surgery, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Jing Jiang
- Division of Clinical Research, the First Hospital of Jilin University, Changchun 130021, Jilin Province, China
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11
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RNA-binding protein LIN28B inhibits apoptosis through regulation of the AKT2/FOXO3A/BIM axis in ovarian cancer cells. Signal Transduct Target Ther 2018; 3:23. [PMID: 30174831 PMCID: PMC6117292 DOI: 10.1038/s41392-018-0026-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/12/2018] [Accepted: 07/22/2018] [Indexed: 02/06/2023] Open
Abstract
LIN28B is an evolutionarily conserved RNA-binding protein that regulates mRNA translation and miRNA let-7 maturation in embryonic stem cells and developing tissues. Increasing evidence demonstrates that LIN28B is activated in cancer and serves as a critical oncogene. However, the underlying molecular mechanisms of LIN28B function in tumorigenesis are still largely unknown. Here we report that LIN28B was expressed in over half of the patients with epithelial ovarian cancer who were examined (n = 584). Functional experiments demonstrated that LIN28B inhibited ovarian cancer cell apoptosis. Furthermore, we showed that the proapoptotic factor BIM played an essential role in the antiapoptotic function of LIN28B. RNA-IP microarray analysis suggested that LIN28B binds to mRNAs that are associated with the DNA damage pathway, such as AKT2, in ovarian cancer cells. By binding to AKT2 mRNA and enhancing its protein expression, LIN28B regulated FOXO3A protein phosphorylation and decreased the transcriptional level of BIM, which antagonized the antiapoptosis activity of LIN28B. Taken together, these results mechanistically linked LIN28B and the AKT2/FOXO3A/BIM axis to the apoptosis pathway. The findings may have important implications in the diagnosis and therapeutics of ovarian cancer. Researchers in China have uncovered the molecular mechanism behind the activity of a gene related to ovarian cancer. Xiaomin Zhong’s team at Sun Yat-Sen University knocked down the gene, LIN28B, in cancer cell lines and discovered that this increased their response to a chemical, which induces programmed cell death (PCD). By contrast, increasing LIN28B expression reduced PCD sensitivity, leading to the conclusion that LIN28B inhibits PCD in cancer cells. Examining gene expression in the knockdown lines revealed that LIN28B suppresses the activity of the PCD-related gene BIM. Further experiments showed that this happens through the modulation of genes upstream of BIM. These results demonstrate that LIN28B acts by regulating a genetic pathway, which regulates PCD. Altogether, this improved understanding of LIN28B may help with the diagnosis and therapy of ovarian cancer.
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12
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Xiong H, Zhao W, Wang J, Seifer BJ, Ye C, Chen Y, Jia Y, Chen C, Shen J, Wang L, Sui X, Zhou J. Oncogenic mechanisms of Lin28 in breast cancer: new functions and therapeutic opportunities. Oncotarget 2018; 8:25721-25735. [PMID: 28147339 PMCID: PMC5421965 DOI: 10.18632/oncotarget.14891] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 01/11/2017] [Indexed: 12/25/2022] Open
Abstract
The RNA binding protein Lin28 is best known for the critical role in cell development, recent researches also have implied its oncogenic function in various human cancers, including breast cancer. Specifically, aberrant Lin28 participates in multiple pathological processes, such as proliferation, metastasis, radiotherapy and chemotherapy resistance, metabolism, immunity and inflammation as well as stemness. In this review, we summarize the let-7-dependent and let-7-independent mechanism regulated by Lin28, focusing on its relation with tumor hallmarks in breast cancer, and subsequently discuss our present knowledge of Lin28 to develop a molecular-based therapeutic strategy against breast cancer.
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Affiliation(s)
- Hanchu Xiong
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Wenhe Zhao
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Ji Wang
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | | | - Chenyang Ye
- Cancer Institute (Key Laboratory of Cancer Prevention & Intervention, National Ministry of Education), Second Affiliated Hospital, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yongxia Chen
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yunlu Jia
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Cong Chen
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Jianguo Shen
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Linbo Wang
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Xinbing Sui
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China.,Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jichun Zhou
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang, China.,Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, Zhejiang, China
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13
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Zhang GM, Wang MY, Liu YN, Zhu Y, Wan FN, Wei QY, Ye DW. Functional variants in the low-density lipoprotein receptor gene are associated with clear cell renal cell carcinoma susceptibility. Carcinogenesis 2017; 38:1241-1248. [PMID: 29029037 DOI: 10.1093/carcin/bgx098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 09/21/2017] [Indexed: 12/17/2022] Open
Abstract
Recent studies indicate that abnormal levels of low-density lipoprotein (LDL), which is an important component of dyslipidaemia, are associated with alterations to cancer risk, including that of renal cell carcinoma (RCC). Single nucleotide polymorphisms at microRNA-binding sites contribute to cancer susceptibility and progression by affecting the messenger RNA (mRNA) function of target genes. In this case-control study, we examined the frequency of six potentially functional single nucleotide polymorphisms in the LDL receptor gene (LDLR) in 1004 clear cell RCC (ccRCC) patients and 1065 cancer-free subjects. Logistic regression analyses estimated odds ratios (ORs) and 95% confidence intervals (CIs). The association between genetic variants and levels of LDLR mRNA and protein was also evaluated. Compared with the CC genotype, multivariate logistic regression analysis showed that the LDLR rs2738464 variant GG genotype was associated with a significantly decreased ccRCC risk (P = 0.002, OR: 0.605, 95% CI: 0.439-0.833). Further functional experiments showed that the rs2738464 variant G allele affected miR-330 regulation of the LDLR 3'-untranslated region (UTR), increasing LDLR mRNA levels in patient kidney tissues. These findings suggest that LDLR rs2738464 may affect the affinity of miR-330 binding to the LDLR 3'-UTR, thus regulating LDLR expression and contributing to ccRCC risk.
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Affiliation(s)
- Gui-Ming Zhang
- Department of Urology, The Affiliated Hospital of Qingdao University, China.,Department of Urology, Fudan University Shanghai Cancer Center, China.,Department of Oncology, Shanghai Medical College, Fudan University, China
| | - Meng-Yun Wang
- Department of Oncology, Shanghai Medical College, Fudan University, China.,Cancer Institute, Fudan University Shanghai Cancer Center, China
| | - Ya-Nan Liu
- Department of Urology, The Affiliated Hospital of Qingdao University, China
| | - Yao Zhu
- Department of Urology, Fudan University Shanghai Cancer Center, China.,Department of Oncology, Shanghai Medical College, Fudan University, China
| | - Fang-Ning Wan
- Department of Urology, Fudan University Shanghai Cancer Center, China.,Department of Oncology, Shanghai Medical College, Fudan University, China
| | - Qing-Yi Wei
- Cancer Institute, Fudan University Shanghai Cancer Center, China.,Duke Cancer Institute, Duke University Medical Center, USA
| | - Ding-Wei Ye
- Department of Urology, Fudan University Shanghai Cancer Center, China.,Department of Oncology, Shanghai Medical College, Fudan University, China
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14
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Liu Y, Ge ZP, Sun LZ, Tong P, Lu HM. Genetic variation of rs3811463 is associated with gestational diabetes mellitus susceptibility. Exp Ther Med 2017; 14:5157-5162. [PMID: 29201231 DOI: 10.3892/etm.2017.5188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 08/24/2017] [Indexed: 12/14/2022] Open
Abstract
Gestational diabetes mellitus (GDM) is a growing health concern, and it increases the risk of adverse pregnancy outcomes with substantial long-term adverse health impacts on mothers and their offspring. Several studies have revealed specific associations between genetic variants and the risk of GDM. Single nucleotide polymorphisms (SNPs) are the major type of genetic variation in humans. Let-7 microRNA targets are enriched for genes containing SNPs associated with glucose metabolism, including Lin28. In the present study, the effect of T/C variants of rs3811463 (a SNP located near to the let-7 binding site in Lin28) on GDM risk was investigated. A GDM rat model was successfully constructed using a high fat diet and streptozotocin injection, and the primary skeletal muscle cells were isolated. The cell transfection results demonstrated that rs3811463-T/C significantly affected the glucose uptake and insulin sensitivity. Reverse transcription-quantitative polymerase chain reaction analysis indicated that the C allele at rs3811463 regulated the expression of glucose metabolism-associated genes insulin-like growth factor two binding protein 2 and glucokinase. Western blot analysis data revealed that replacement of the T allele by the C allele at rs3811463 modulated the protein level of Sirtuin 1. Taken together, it was concluded that the let-7/Lin28 axis regulated glucose uptake and insulin sensitivity by modulating the expression of glucose metabolism-associated proteins. These findings provide novel evidence on the association between genetic variations of rs3811463 and GDM susceptibility.
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Affiliation(s)
- Yun Liu
- Department of Geriatric Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Zhi-Ping Ge
- Department of Obstetrics, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Women and Children Health Hospital, Nanjing, Jiangsu 210029, P.R. China
| | - Li-Zhou Sun
- Department of Obstetrics, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Women and Children Health Hospital, Nanjing, Jiangsu 210029, P.R. China
| | - Pei Tong
- Department of Geriatric Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Hong-Mei Lu
- Department of Obstetrics, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Women and Children Health Hospital, Nanjing, Jiangsu 210029, P.R. China
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15
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Venugopal P, Lavu V, Rao SR, Venkatesan V. Association of microRNA-125a and microRNA-499a polymorphisms in chronic periodontitis in a sample south Indian population: A hospital-based genetic association study. Gene 2017; 631:10-15. [DOI: 10.1016/j.gene.2017.07.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 07/13/2017] [Accepted: 07/17/2017] [Indexed: 12/29/2022]
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16
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Yin J, Zhao J, Hu W, Yang G, Yu H, Wang R, Wang L, Zhang G, Fu W, Dai L, Li W, Liao B, Zhang S. Disturbance of the let-7/LIN28 double-negative feedback loop is associated with radio- and chemo-resistance in non-small cell lung cancer. PLoS One 2017; 12:e0172787. [PMID: 28235063 PMCID: PMC5325287 DOI: 10.1371/journal.pone.0172787] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 01/18/2017] [Indexed: 12/19/2022] Open
Abstract
Radio- and chemo-resistance represent major obstacles in the therapy of non-small-cell lung cancer (NSCLC) and the underlying molecular mechanisms are not known. In the present study, during induction of radio- or chemo-resistance in NSCLC cells, dynamic analyses revealed that decreased expression of let-7 induced by irradiation or cisplatin resulted in increased expression of its target gene LIN28, and increased expression of LIN28 then contributed to further decreased expression of let-7 by inhibiting its maturation and biogenesis. Moreover, we showed that down-regulation of let-7 and up-regulation of LIN28 expression promoted resistance to irradiation or cisplatin by regulating the single-cell proliferative capability of NSCLC cells. Consequently, in NSCLC cells, let-7 and LIN28 can form a double-negative feedback loop through mutual inhibition, and disturbance of the let-7/LIN28 double-negative feedback loop induced by irradiation or chemotherapeutic drugs can result in radio- and chemo-resistance. In addition, low expression of let-7 and high expression of LIN28 in NSCLC patients was associated significantly with resistance to radiotherapy or chemotherapy. Therefore, our study demonstrated that disturbance of the let-7/LIN28 double-negative feedback loop is involved in the regulation of radio- and chemo-resistance, and that let-7 and LIN28 could be employed as predictive biomarkers of response to radiotherapy or chemotherapy in NSCLC patients.
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Affiliation(s)
- Jun Yin
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jian Zhao
- Department of Chest Surgery, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Weimin Hu
- Department of Abdominal Surgery, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Guangping Yang
- Department of Chest Surgery, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Hui Yu
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Ruihao Wang
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Linjing Wang
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Guoqian Zhang
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Wenfan Fu
- Department of Chest Surgery, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Lu Dai
- Department of Chest Surgery, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Wanzhen Li
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Boyu Liao
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Shuxu Zhang
- Department of Radiotherapy, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
- * E-mail:
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17
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Chen Y, Zhang Y, He J, Fu Y, Lin C, Li X. MicroRNA-133b is regulated by TAp63 while no gene mutation is present in colorectal cancer. Oncol Rep 2017; 37:1646-1652. [PMID: 28098895 DOI: 10.3892/or.2017.5371] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 08/08/2016] [Indexed: 11/06/2022] Open
Abstract
Downregulation of miR-133b has been reported in multiple types of malignancies including colorectal cancer (CRC). We previously confirmed that TAp63 actively translates microRNA-133b (miR-133b) transcripts. While the presence of miRNA mutations have frequently been described in CRC, most CRCs do not show any variation in the miR‑133b coding sequence. Therefore, it is important to elucidate the relationship between TAp63 and miR-133b, and identify other mediators of miR-133b downregulation in CRC. The expression of TAp63 was detected by RT-qPCR, western blotting, immunohistochemistry (IHC) and densitometric analysis using Image-Pro Plus 6.0 software in 38 CRC and corresponding non-cancerous tissues (NCTs). The expression of mature miR‑133b was determined by RT-qPCR, in situ hybridization (ISH) and densitometric analysis using Image-Pro Plus 6.0 software. The DNA from 38 CRC tissues and NCTs were screened for miR-133b mutations through sequence analysis. Compared with the NCTs, TAp63 mRNA expression was significantly lower in 21 (55.27%) tumor tissues. Compared with the NCTs, the miR‑133b expression level was significantly lower in 31 (81.58%) tumor tissues. The expression of miR‑133b was found to be positively correlated with TAp63. Loss of TAp63 and miR-133b was associated with an increased likelihood of metastatic events. The area under the ROC curve (AUC) of TAp63 for CRC was 0.623 [95% confidence interval (CI), 0.497-0.748; P=0.046], with 73.7% sensitivity and 50% specificity, respectively. The AUC of miR-133b for CRC was 0.857 (95% CI, 0.774‑0.940; P<0.0001), with 78.9% sensitivity and 81.6% specificity, respectively. The combined AUC of TAp63 and miR-133b for CRC was 0.881 (95% CI, 0.805-0.956; P<0.0001), with 89.5% sensitivity and 71.1% specificity, respectively. Point mutations within the seed region of miR-133b were found in 1 patient, but the point mutation did not impact the secondary structure of the pre-miR-133b. Therefore, downregulation of TAp63 may be one reason for the dysregulation of miR‑133b in CRC. The expression analysis of TAp63 and miR-133b revealed that they may be used as valuable prognostic biomarkers for CRC.
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Affiliation(s)
- Yifei Chen
- Department of Gastrointestinal Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Yi Zhang
- Department of Oncological Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221000, P.R. China
| | - Jianhuai He
- Department of Breast, Thyroid and Vascular Surgery, Chenzhou No. 1 People's Hospital, Chenzhou, Hunan 423000, P.R. China
| | - Ying Fu
- Department of Gastrointestinal Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Changwei Lin
- Department of Gastrointestinal Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Xiaorong Li
- Department of Gastrointestinal Surgery, The Third XiangYa Hospital of Central South University, Changsha, Hunan 410013, P.R. China
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18
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PMS1T, producing phased small-interfering RNAs, regulates photoperiod-sensitive male sterility in rice. Proc Natl Acad Sci U S A 2016; 113:15144-15149. [PMID: 27965387 DOI: 10.1073/pnas.1619159114] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Phased small-interfering RNAs (phasiRNAs) are a special class of small RNAs, which are generated in 21- or 24-nt intervals from transcripts of precursor RNAs. Although phasiRNAs have been found in a range of organisms, their biological functions in plants have yet to be uncovered. Here we show that phasiRNAs generated by the photopheriod-sensetive genic male sterility 1 (Pms1) locus were associated with photoperiod-sensitive male sterility (PSMS) in rice, a germplasm that started the two-line hybrid rice breeding. The Pms1 locus encodes a long-noncoding RNA PMS1T that was preferentially expressed in young panicles. PMS1T was targeted by miR2118 to produce 21-nt phasiRNAs that preferentially accumulated in the PSMS line under long-day conditions. A single nucleotide polymorphism in PMS1T nearby the miR2118 recognition site was critical for fertility change, likely leading to differential accumulation of the phasiRNAs. This result suggested possible roles of phasiRNAs in reproductive development of rice, demonstrating the potential importance of this RNA class as regulators in biological processes.
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19
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Wu J, Sun Y, Block TJ, Marinkovic M, Zhang ZL, Chen R, Yin Y, Song J, Dean DD, Lu Z, Chen XD. Umbilical cord blood-derived non-hematopoietic stem cells retrieved and expanded on bone marrow-derived extracellular matrix display pluripotent characteristics. Stem Cell Res Ther 2016; 7:176. [PMID: 27906056 PMCID: PMC5134264 DOI: 10.1186/s13287-016-0437-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 10/24/2016] [Accepted: 11/08/2016] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Umbilical cord blood (UCB) not only contains hematopoietic stem cells (HSCs), but also non-hematopoietic stem cells (NHSCs) that are able to differentiate into a number of distinct cell types. Based on studies published to date, the frequency of NHSCs in UCB is believed to be very low. However, the isolation of these cells is primarily based on their adhesion to tissue culture plastic surfaces. METHODS AND RESULTS In the current study, we demonstrate that this approach overlooks some of the extremely immature NHSCs because they lack the ability to adhere to plastic. Using a native extracellular matrix (ECM), produced by bone marrow (BM) stromal cells, the majority of the UCB-NHSCs attached within 4 h. The colony-forming unit fibroblast frequency of these cells was 1.5 × 104/108 mononuclear cells, which is at least 4000-fold greater than previously reported for UCB-NHSCs. The phenotype of these cells was fibroblast-like and different from those obtained by plastic adhesion; they formed embryonic body-like clusters that were OCT4-positive and expressed other human embryonic stem cell-related markers. Importantly, when implanted subcutaneously for 8 weeks into immunocompromised mice, these ECM-adherent and expanded NHSCs generated three germ layer-derived human tissues including muscle, fat, blood vessel, bone, gland, and nerve. Moreover, injection of these cells into muscle damaged by cryoinjury significantly accelerated muscle regeneration. CONCLUSIONS These results indicate that UCB may be a virtually unlimited source of NHSCs when combined with isolation and expansion on ECM. NHSCs may be a practical alternative to embryonic stem cells for a number of therapeutic applications.
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Affiliation(s)
- Junjie Wu
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.,Department of Orthodontics, Fourth Military Medical University, School of Stomatology, Xi'an, Shaanxi Province, 710032, People's Republic of China
| | - Yun Sun
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.,Center for Reproductive Medicine, Ren-Ji Hospital, School of Medicine, Shanghai Jiao-Tong University, Shanghai, 200135, People's Republic of China
| | - Travis J Block
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.,Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Milos Marinkovic
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.,Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Zhi-Liang Zhang
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.,Department of Plastic Surgery, Ren-Ji Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, People's Republic of China
| | - Richard Chen
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA
| | - Yixia Yin
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.,Biomedical Materials Engineering Research Center, Wuhan University of Technology, Wuhan, People's Republic of China
| | - Juquan Song
- Department of Surgery, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA
| | - David D Dean
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.,Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - Zhongding Lu
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA.
| | - Xiao-Dong Chen
- Research Division, Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229-3900, USA. .,Research Service, Audie L. Murphy Division, South Texas Veterans Health Care System, San Antonio, TX, 78229-4404, USA.
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20
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Role of let-7 family microRNA in breast cancer. Noncoding RNA Res 2016; 1:77-82. [PMID: 30159414 PMCID: PMC6096426 DOI: 10.1016/j.ncrna.2016.10.003] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 10/29/2016] [Accepted: 10/29/2016] [Indexed: 02/06/2023] Open
Abstract
Metastasis and resistance to therapy significantly contribute to cancer-related deaths. Growing body of evidence suggest that altered expression of microRNAs (miRNAs) is one of the root cause of adverse clinical outcome. miRNAs such as let-7 are the new fine tuners of signaling cascade and cellular processes which regulates the genes in post-transcriptional manner. In this review, we described the regulation of let-7 expression and the involvement of molecular factors in this process. We discussed the mechanism by which let-7 alter the expression of genes involved in the process of tumorigenesis. Further, we listed the pathways targeted by let-7 to reduce the burden of the tumor. In addition, we described the role of let-7 in breast cancer metastasis and stemness properties. This article will provide the in-depth insight into the biology of let-7 miRNA and its role in the breast cancer progression.
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Ma C, Song H, Yu L, Guan K, Hu P, Li Y, Xia X, Li J, Jiang S, Li F. miR-762 promotes porcine immature Sertoli cell growth via the ring finger protein 4 (RNF4) gene. Sci Rep 2016; 6:32783. [PMID: 27596571 PMCID: PMC5011707 DOI: 10.1038/srep32783] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/15/2016] [Indexed: 02/06/2023] Open
Abstract
A growing number of reports have revealed that microRNAs (miRNAs) play critical roles in spermatogenesis. Our previous study showed that miR-762 is differentially expressed in immature and mature testes of Large White boars. Our present data shows that miR-762 directly binds the 3′ untranslated region (3′UTR) of ring finger protein 4 (RNF4) and down-regulates RNF4 expression. A single nucleotide polymorphism (SNP) in the RNF4 3′UTR that is significantly associated with porcine sperm quality traits leads to a change in the miR-762 binding ability. Moreover, miR-762 promotes the proliferation of and inhibits apoptosis in porcine immature Sertoli cells, partly by accelerating DNA damage repair and by reducing androgen receptor (AR) expression. Taken together, these findings suggest that miR-762 may play a role in pig spermatogenesis by regulating immature Sertoli cell growth.
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Affiliation(s)
- Changping Ma
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Huibin Song
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Lei Yu
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Kaifeng Guan
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Pandi Hu
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Yang Li
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Xuanyan Xia
- College of Informatics, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Jialian Li
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Siwen Jiang
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, PR China
| | - Fenge Li
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture &Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, PR China
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Carmel-Gross I, Bollag N, Armon L, Urbach A. LIN28: A Stem Cell Factor with a Key Role in Pediatric Tumor Formation. Stem Cells Dev 2016; 25:367-77. [PMID: 26692113 DOI: 10.1089/scd.2015.0322] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Differentiation and development are normally unidirectional processes in which progenitor/stem cells differentiate into more mature cells. Transformation of adult cells into cancer cells is accompanied in many cases by dedifferentiation of the adult cell, while differentiation failure of progenitor cells can result in the formation of unique type of cancers called pediatric cancer. LIN28A and its paralog LIN28B are pluripotent genes that are expressed mainly in stem/progenitor cells. Since the first identification of LIN28 in mammals, numerous studies demonstrated the general oncogenic features of these genes. In this review, we emphasize the unique role of LIN28 in pediatric tumor formation. We show, based on comprehensive literature screen and analysis of published microarray data, that LIN28 expression in pediatric tumors is even more common than in adult tumors, and discuss the possibility that in the case of pediatric cancers, LIN28 acts by preventing normal development/differentiation rather than by transformation of mature cells into cancer cells. Overall, this review highlights the role of LIN28 as a bridge point between embryonic development, stem cell biology, and cancer.
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Affiliation(s)
- Ilana Carmel-Gross
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University , Ramat Gan, Israel
| | - Naomi Bollag
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University , Ramat Gan, Israel
| | - Leah Armon
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University , Ramat Gan, Israel
| | - Achia Urbach
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University , Ramat Gan, Israel
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23
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DiStefano JK. Beyond the Protein-Coding Sequence: Noncoding RNAs in the Pathogenesis of Type 2 Diabetes. Rev Diabet Stud 2016; 12:260-76. [PMID: 26859655 DOI: 10.1900/rds.2015.12.260] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Diabetes mellitus results from a deficiency or failure to maintain normal glucose homeostasis. The most common form of the disease is type 2 diabetes (T2D), a progressive metabolic disorder characterized by elevated glucose levels that develops in response to either multi-organ insulin resistance or insufficient insulin secretion from pancreatic β-cells. Although the etiology of T2D is complex, many factors are known to contribute to defects of glucose homeostasis, including obesity, unhealthy lifestyle choices, genetic susceptibility, and environmental exposures. In addition to these factors, noncoding RNAs (ncRNAs) have been recently implicated in the pathogenesis of T2D, playing roles in several of the pathophysiological mechanisms underlying the disease, particularly in insulin-sensitive tissues such as pancreatic β-cells, liver, muscle, and adipose tissue. A growing number of publications demonstrate that polymorphisms in ncRNAs or their target genes may represent a new class of genetic variation contributing to the development of T2D. This review summarizes both the current state of knowledge of ncRNAs, specifically microRNAs (miRNAs), involved in the regulation of β-cell function, insulin sensitivity, and insulin action in peripheral organs. The role of genetic variation in miRNAs or miRNA binding sites in the pathogenesis of T2D is also discussed. While far less is known about the impact of long ncRNAs (lncRNAs) in the development of T2D, emerging evidence suggests that these molecules may be able to contribute to β-cell dysfunction in response to hyperglycemia. This article provides an overview of the studies conducted to date in this field, focusing on lncRNAs that are dysregulated in human pancreatic islets.
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24
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Mullany LE, Wolff RK, Herrick JS, Buas MF, Slattery ML. SNP Regulation of microRNA Expression and Subsequent Colon Cancer Risk. PLoS One 2015; 10:e0143894. [PMID: 26630397 PMCID: PMC4667940 DOI: 10.1371/journal.pone.0143894] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 11/10/2015] [Indexed: 12/27/2022] Open
Abstract
Introduction MicroRNAs (miRNAs) regulate messenger RNAs (mRNAs) and as such have been implicated in a variety of diseases, including cancer. MiRNAs regulate mRNAs through binding of the miRNA 5’ seed sequence (~7–8 nucleotides) to the mRNA 3’ UTRs; polymorphisms in these regions have the potential to alter miRNA-mRNA target associations. SNPs in miRNA genes as well as miRNA-target genes have been proposed to influence cancer risk through altered miRNA expression levels. Methods MiRNA-SNPs and miRNA-target gene-SNPs were identified through the literature. We used SNPs from Genome-Wide Association Study (GWAS) data that were matched to individuals with miRNA expression data generated from an Agilent platform for colon tumor and non-tumor paired tissues. These samples were used to evaluate 327 miRNA-SNP pairs for associations between SNPs and miRNA expression levels as well as for SNP associations with colon cancer. Results Twenty-two miRNAs expressed in non-tumor tissue were significantly different by genotype and 21 SNPs were associated with altered tumor/non-tumor differential miRNA expression across genotypes. Two miRNAs were associated with SNP genotype for both non-tumor and tumor/non-tumor differential expression. Of the 41 miRNAs significantly associated with SNPs all but seven were significantly differentially expressed in colon tumor tissue. Two of the 41 SNPs significantly associated with miRNA expression levels were associated with colon cancer risk: rs8176318 (BRCA1), ORAA 1.31 95% CI 1.01, 1.78, and rs8905 (PRKAR1A), ORGG 2.31 95% CI 1.11, 4.77. Conclusion Of the 327 SNPs identified in the literature as being important because of their potential regulation of miRNA expression levels, 12.5% had statistically significantly associations with miRNA expression. However, only two of these SNPs were significantly associated with colon cancer.
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Affiliation(s)
- Lila E. Mullany
- University of Utah, School of Medicine, Department of Internal Medicine, Salt Lake City, Utah, United States of America
- * E-mail:
| | - Roger K. Wolff
- University of Utah, School of Medicine, Department of Internal Medicine, Salt Lake City, Utah, United States of America
| | - Jennifer S. Herrick
- University of Utah, School of Medicine, Department of Internal Medicine, Salt Lake City, Utah, United States of America
| | - Matthew F. Buas
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Martha L. Slattery
- University of Utah, School of Medicine, Department of Internal Medicine, Salt Lake City, Utah, United States of America
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25
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Romero-Cordoba SL, Salido-Guadarrama I, Rodriguez-Dorantes M, Hidalgo-Miranda A. miRNA biogenesis: biological impact in the development of cancer. Cancer Biol Ther 2015; 15:1444-55. [PMID: 25482951 PMCID: PMC4622859 DOI: 10.4161/15384047.2014.955442] [Citation(s) in RCA: 178] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
microRNAs (miRNAs) are non coding RNAs with different biological functions and pathological implications. Given their role as post-transcriptional gene expression regulators, they are involved in several important physiological processes like development, cell differentiation and cell signaling. miRNAs act as modulators of gene expression programs in different diseases, particularly in cancer, where they act through the repression of genes which are critical for carcinogenesis. The expression level of mature miRNAs is the result of a fine mechanism of biogenesis, carried out by different enzymatic complexes that exert their function at transcriptional and post-transcriptional levels. In this review, we will focus our discussion on the alterations in the miRNA biogenesis machinery, and its impact on the establishment and development of cancer programs.
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Key Words
- Ago2, Argonaute 2 protein
- Ars2, Arsenic Resistance protein 2
- DGCR8, DiGeorge syndrome Critical Region 8 protein
- EMT, epithelial–mesenchymal transition
- KSRP, KH-type splicing regulatory protein
- MK2, MAPK-activated protein kinase 2
- PABP, poly(A)-binding protein
- PACT, kinase R–activating protein
- PRC2, Polycomb repressor complex
- RISC, RNA-induced silencing complex
- TRBP, TAR RNA binding protein
- TUT4, terminal uridine transferase-4
- XPO5, exportin 5
- cancer
- cellular signaling
- circRNA, circular RNA
- hnRNPs, heterogeneous nuclear ribonucleoproteins
- miRNA biogenesis
- miRNAs, microRNAs
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26
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Buas MF, Onstad L, Levine DM, Risch HA, Chow WH, Liu G, Fitzgerald RC, Bernstein L, Ye W, Bird NC, Romero Y, Casson AG, Corley DA, Shaheen NJ, Wu AH, Gammon MD, Reid BJ, Hardie LJ, Peters U, Whiteman DC, Vaughan TL. MiRNA-Related SNPs and Risk of Esophageal Adenocarcinoma and Barrett's Esophagus: Post Genome-Wide Association Analysis in the BEACON Consortium. PLoS One 2015; 10:e0128617. [PMID: 26039359 PMCID: PMC4454432 DOI: 10.1371/journal.pone.0128617] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 04/30/2015] [Indexed: 01/09/2023] Open
Abstract
Incidence of esophageal adenocarcinoma (EA) has increased substantially in recent decades. Multiple risk factors have been identified for EA and its precursor, Barrett’s esophagus (BE), such as reflux, European ancestry, male sex, obesity, and tobacco smoking, and several germline genetic variants were recently associated with disease risk. Using data from the Barrett’s and Esophageal Adenocarcinoma Consortium (BEACON) genome-wide association study (GWAS) of 2,515 EA cases, 3,295 BE cases, and 3,207 controls, we examined single nucleotide polymorphisms (SNPs) that potentially affect the biogenesis or biological activity of microRNAs (miRNAs), small non-coding RNAs implicated in post-transcriptional gene regulation, and deregulated in many cancers, including EA. Polymorphisms in three classes of genes were examined for association with risk of EA or BE: miRNA biogenesis genes (157 SNPs, 21 genes); miRNA gene loci (234 SNPs, 210 genes); and miRNA-targeted mRNAs (177 SNPs, 158 genes). Nominal associations (P<0.05) of 29 SNPs with EA risk, and 25 SNPs with BE risk, were observed. None remained significant after correction for multiple comparisons (FDR q>0.50), and we did not find evidence for interactions between variants analyzed and two risk factors for EA/BE (smoking and obesity). This analysis provides the most extensive assessment to date of miRNA-related SNPs in relation to risk of EA and BE. While common genetic variants within components of the miRNA biogenesis core pathway appear unlikely to modulate susceptibility to EA or BE, further studies may be warranted to examine potential associations between unassessed variants in miRNA genes and targets with disease risk.
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Affiliation(s)
- Matthew F. Buas
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- * E-mail: (MFB); (TLV)
| | - Lynn Onstad
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - David M. Levine
- Department of Biostatistics, University of Washington, School of Public Health, Seattle, Washington, United States of America
| | - Harvey A. Risch
- Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT, United States of America
| | - Wong-Ho Chow
- Department of Epidemiology, MD Anderson Cancer Center, Houston, TX, United States of America
| | - Geoffrey Liu
- Pharmacogenomic Epidemiology, Ontario Cancer Institute, Toronto, Ontario, Canada, M5G 2M9
| | - Rebecca C. Fitzgerald
- Medical Research Council (MRC) Cancer Cell Unit, Hutchison-MRC Research Centre and University of Cambridge, Cambridge, United Kingdom
| | - Leslie Bernstein
- Department of Populations Sciences, Beckman Research Institute and City of Hope Comprehensive Cancer Center, Duarte, California, United States of America
| | - Weimin Ye
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Nigel C. Bird
- Department of Oncology, Medical School, University of Sheffield, Sheffield, United Kingdom
| | - Yvonne Romero
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
- The Romero Registry, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Alan G. Casson
- Department of Surgery, University of Saskatchewan, Saskatoon, SK, Canada
| | - Douglas A. Corley
- Division of Research, Kaiser Permanente Northern California, Oakland, California, United States of America
- San Francisco Medical Center, Kaiser Permanente Northern California, San Francisco, California, United States of America
| | - Nicholas J. Shaheen
- Division of Gastroenterology and Hepatology, University of North Carolina School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Anna H. Wu
- Department of Preventive Medicine, University of Southern California/Norris Comprehensive Cancer Center, Los Angeles, California, United States of America
| | - Marilie D. Gammon
- Department of Epidemiology, University of North Carolina School of Public Health, Chapel Hill, North Carolina, United States of America
| | - Brian J. Reid
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Laura J. Hardie
- Division of Epidemiology, University of Leeds, Leeds, United Kingdom
| | - Ulrike Peters
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Department of Epidemiology, University of Washington, School of Public Health, Seattle, Washington, United States of America
| | - David C. Whiteman
- Cancer Control, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Thomas L. Vaughan
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Department of Epidemiology, University of Washington, School of Public Health, Seattle, Washington, United States of America
- * E-mail: (MFB); (TLV)
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27
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Gao Y, Liu Y, Liu GL, Ran LK, Zeng F, Wu JY, Song FZ. Association between the pre-mir-218 polymorphism and cancer risk in the Chinese population: a meta-analysis. Asian Pac J Cancer Prev 2015; 15:2517-22. [PMID: 24761857 DOI: 10.7314/apjcp.2014.15.6.2517] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Several recent studies have explored associations between pre-mir-218 polymorphism (rs11134527) and cancer risk. However, published data are still inconclusive. To obtain a more precise estimation of the relationship in the Chinese population, we carried out a meta-analysis for the first time. MATERIALS AND METHODS Through retrieval from the PubMed, Medline, Embase, Web of Science databases, China National Knowledge Infrastructure and the Chinese BioMedical Literature Database, a total of four studies were analyzed with 3,561 cases and 3,628 controls for SNP pre-mir-218 rs11134527. We calculated odds ratios (ORs) and 95% confidence intervals (95%CIs) to explore the strength of associations. RESULTS The results showed that the rs11134527 polymorphism was associated with decreased cancer risk in GG versus AA and GG versus AA+AG models tested ( GG vs AA: OR=0.82, 95%CI: 0.71-0.94; GG vs AA+AG: OR=0.84, 95%CI: 0.74-0.96), and significantly decreased cervical cancer risk was observed in GG versus AA and GG versus AA+AG models (GG vs AA: OR=0.79, 95%CI: 0.66-0.94; GG vs AA+AG: OR=0.80, 95%CI: 0.68-0.94). However, no significant association between the rs11134527 polymorphism and hepatocellular carcinoma risk was observed in all comparison models tested (AG vs AA: OR=0.94, 95%CI: 0.79-1.11; GG vs AA: OR=0.88, 95%CI: 0.70-1.10; GG+AG vs AA: OR=0.92, 95%CI: 0.79-1.08; GG vs AA+AG: OR=0.91, 95%CI: 0.75-1.11). CONCLUSION The findings suggest that pre-miR-218 rs11134527 polymorphism may have some relation to cancer development in Chinese. However, well-designed studies with larger sample size and more detailed data are needed to confirm these conclusions.
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Affiliation(s)
- Yue Gao
- Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China E-mail :
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Yan YX, Wu LJ, Zhang J, Wang S, Wang W, Dong J, He Y. Let-7 related genetic variation and risk of metabolic syndrome in a Chinese population. Endocr J 2015; 62:887-96. [PMID: 26178671 DOI: 10.1507/endocrj.ej15-0236] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
MicroRNA (miRNA) related genetic variation may change miRNA binding affinity and mRNA expression levels of the target genes, thus leading to altered metabolic parameters. This study explored the influence of let-7 related single nucleotide polymorphisms (SNPs) on individual susceptibility to metabolic syndrome (MetS) in a Chinese population. Seven SNPs located at the pri-let-7 gene region, pre-let-7 gene region or 3'-UTR of the KRAS gene were selected. The SNPs were genotyped in 503 MetS patients and 529 normal controls using the high-throughput Sequenom genotyping platform. Unconditional logistic regression analysis was utilized to estimate the association between these SNPs and the risk of MetS. There are three SNPs significantly associated with MetS. The A allele of rs17276588 was associated with an increased risk effect for MetS (Adjusted OR=1.75, 95%CI 1.37-2.25, P<0.001). Rs10993081 AG genotype was significantly associated with an increased risk of MetS compared with AA genotypes (Adjusted OR=1.42, 95%CI 1.11-1.83, P=0.006). Rs10877887 TC genotype was significantly associated with an increased risk of MetS compared with TT genotypes (Adjusted OR=1.52, 95% CI 1.16-1.99, P=0.002). Additionally, interactions between rs7045890 and rs712, rs17276588 and rs10877887 were significantly associated with risk of MetS. In conclusion, our study found that let-7 related genetic variation is associated with MetS and may contribute to the susceptibility of MetS. Larger, prospective studies are warranted to validate our findings.
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Affiliation(s)
- Yu-Xiang Yan
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China
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29
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Zhang Y, Zhu L, Wang R, Miao L, Jiang H, Yuan H, Ma H, Chen N. Genetic variants in let-7/Lin28 modulate the risk of oral cavity cancer in a Chinese Han population. Sci Rep 2014; 4:7434. [PMID: 25503985 PMCID: PMC5378942 DOI: 10.1038/srep07434] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 11/21/2014] [Indexed: 02/07/2023] Open
Abstract
Let-7 and Lin28 establish a double-negative feedback loop to affect several biological processes, such as differentiation of stem cell, invasion and metastasis, and tumorigenesis. In this study, we systematically investigated the associations between 6 potentially functional SNPs of let7 and Lin28 genes and the risk of oral cavity cancer with a case-control study including 384 oral cavity cancer cases and 731 controls. We found that the variant allele (T) of rs221636 of Lin28B was significantly associated with a reduced risk of oral cavity cancer [odds ratio (OR) = 0.73, 95% confidence interval (CI) = 0.58-0.92, P = 7.55 × 10(-3) in additive model]. Bioinformatics prediction indicated that rs221636 was located at the binding site of hsa-miR-548p in the 3' UTR of Lin28B. Luciferase activity assay also showed a lower expression level for rs221636 T allele compared with A allele. These findings indicated that rs221236 located at Lin28B may contribute to the risk of oral cavity cancer through the interruption of miRNA binding.
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Affiliation(s)
- Yu Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Longbiao Zhu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Ruixia Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Limin Miao
- 1] Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China [2] Department of Epidemiology and Biostatistics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Cancer Center, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Hongbing Jiang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
| | - Hua Yuan
- 1] Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China [2] Department of Epidemiology and Biostatistics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Cancer Center, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Hongxia Ma
- Department of Epidemiology and Biostatistics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Cancer Center, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Ning Chen
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
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30
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Xie R, Wang Y, Nie W, Huang W, Song W, Wang Z, Guan X. Lin28B expression correlates with aggressive clinicopathological characteristics in breast invasive ductal carcinoma. Cancer Biother Radiopharm 2014; 29:215-20. [PMID: 24885919 DOI: 10.1089/cbr.2014.1610] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Lin28B is a RNA-binding protein that inhibits the let-7 microRNA family and acts as an oncogene in various human malignant diseases. Conversely, the members of let-7 family function as tumor suppressers and are often inactivated in cancers. The interaction of Lin28B/let-7 plays a crucial part of tumorigenesis. In this study, the authors examined the Lin28B expression using immunohistochemistry in 190 breast cancers and analyzed the correlation of Lin28B immunostaining and clinicopathological characteristics. Breast cancer patients previously diagnosed with invasive ductal carcinomas were enrolled in this study. All cases went through surgical procedures as the initial treatment. The characteristics of every case were collected, including tumor size, pathologic grade, metastatic lymphoid nodes, and estrogen receptor α (ERα), progesterone receptor (PR), and HER2 status. The immunostaining was scored by two independent investigators. Eighty-three (43.7%) of 190 cases showed positive expression of Lin28B. Lin28B immunostaining was increased in tumors compared with the adjacent tissues. Overexpression of Lin28B was linked to poor differentiation, advanced-stage disease, and Ki67-positive status (all p<0.05). Besides, Lin28B expression was significantly different among breast cancer subtypes. This study addresses the role of Lin28B in breast cancers and provides insight of its predictive effects in disease development.
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Affiliation(s)
- Ruilian Xie
- 1 Department of Medical Oncology, Jinling Hospital, Southern Medical University , Guangzhou, China
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31
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Enriched variations in TEKT4 and breast cancer resistance to paclitaxel. Nat Commun 2014; 5:3802. [PMID: 24823476 DOI: 10.1038/ncomms4802] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 04/03/2014] [Indexed: 12/13/2022] Open
Abstract
Among chemotherapeutic agents, paclitaxel has shown great efficacy against breast cancer. Prediction of paclitaxel response may improve patient outcomes. Here we show, using exome sequencing, that in comparison with pre-treatment biopsies, two TEKT4 germline variations are enriched in post-treatment tumours. We find TEKT4 variations in ~ 10% of an independent cohort of 84 pairs of samples. Tektin4 (encoded by TEKT4) associates closely with tubulin in doublet microtubules and helps stabilize these structures. These two TEKT4 germline variations in a high cis linkage are biologically relevant, as the ectopic expression of variant TEKT4 deregulates the microtubule stability, antagonizes the paclitaxel-induced stabilizing effect of microtubules and increases paclitaxel resistance. Furthermore, TEKT4 germline variations are associated with reduced disease-free survival and overall survival compared with wild-type TEKT4 in patients undergoing paclitaxel-based chemotherapy. Taken together, we reveal a potential mechanism of resistance to paclitaxel through the acquisition of germline variations in breast cancer.
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32
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Wen J, Liu H, Wang Q, Liu Z, Li Y, Xiong H, Xu T, Li P, Wang LE, Gomez DR, Mohan R, Komaki R, Liao Z, Wei Q. Genetic variants of the LIN28B gene predict severe radiation pneumonitis in patients with non-small cell lung cancer treated with definitive radiation therapy. Eur J Cancer 2014; 50:1706-1716. [PMID: 24780874 DOI: 10.1016/j.ejca.2014.03.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/19/2014] [Accepted: 03/09/2014] [Indexed: 12/25/2022]
Abstract
BACKGROUND LIN28 is an RNA-binding protein that not only plays key roles in multiple cellular developmental processes and tumourigenesis, but also is involved in tissue inflammatory response. However, no published study has investigated associations between genetic variants in LIN28 and radiation-induced pneumonitis (RP) in patients with non-small cell lung cancer (NSCLC) treated with definitive radiation therapy. METHODS We genotyped eight potentially functional single nucleotide polymorphisms (SNPs) of LIN28A (rs11247946 T>C, rs3811464 C>T, rs11581746 T>C, and rs12728900 G>A) and LIN28B (rs314280 G>A, rs12194974 G>A, rs17065417 A>C and rs314276 C>A) in 362 patients with NSCLC, who received definitive radio(chemo)therapy. The associations between RP risk and genotypes were assessed by hazards ratio (HR) in Cox proportional hazards regression analysis with time to event considered with and without adjustment for potential confounders. RESULTS Multivariate analyses found that patients carrying LIN28B rs314280 AG and AA/AG or rs314276 AC and AA/AC genotypes had a higher risk of grade ⩾3 RP (for rs314280 AG and AA/AG versus GG, adjusted HR=2.97 and 2.23, 95% confidence interval (CI)=1.32-6.72 and 1.01-4.94, P=0.009 and 0.048, respectively; for rs314276 AC and AA/AC versus CC, adjusted HR=2.30 and 2.00, 95% CI=1.24-4.28 and 1.11-3.62, and P=0.008 and 0.022, respectively). Further stratified analyses showed a more consistent and profound risk in the subgroups of age <65years, males, stage III/IV, ever smokers, having radio-chemotherapy and mean lung dose (MLD) ⩾19.0Gy. CONCLUSION Genetic variants of LIN28B, but not LIN28A, may be biomarkers for susceptibility to severe RP in NSCLC patients. Large, prospective studies are needed to confirm our findings.
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Affiliation(s)
- Juyi Wen
- Department of Radiation Oncology, Navy General Hospital, Beijing, China; Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Hongliang Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, NC 27710, USA
| | - Qiming Wang
- Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Zhensheng Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, NC 27710, USA
| | - Yangkai Li
- Duke Cancer Institute, Duke University Medical Center, Durham, NC 27710, USA
| | - Huihua Xiong
- Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Ting Xu
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Peng Li
- Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Li-E Wang
- Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Daniel R Gomez
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Radhe Mohan
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Ritsuko Komaki
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Zhongxing Liao
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA.
| | - Qingyi Wei
- Duke Cancer Institute, Duke University Medical Center, Durham, NC 27710, USA.
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Desjardins A, Bouvette J, Legault P. Stepwise assembly of multiple Lin28 proteins on the terminal loop of let-7 miRNA precursors. Nucleic Acids Res 2014; 42:4615-28. [PMID: 24452802 PMCID: PMC3985620 DOI: 10.1093/nar/gkt1391] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Lin28 inhibits the biogenesis of let-7 miRNAs through direct interactions with let-7 precursors. Previous studies have described seemingly inconsistent Lin28 binding sites on pre-let-7 RNAs. Here, we reconcile these data by examining the binding mechanism of Lin28 to the terminal loop of pre-let-7g (TL-let-7g) using biochemical and biophysical methods. First, we investigate Lin28 binding to TL-let-7g variants and short RNA fragments and identify three independent binding sites for Lin28 on TL-let-7g. We then determine that Lin28 assembles in a stepwise manner on TL-let-7g to form a stable 1:3 complex. We show that the cold-shock domain (CSD) of Lin28 is responsible for remodelling the terminal loop of TL-let-7g, whereas the NCp7-like domain facilitates the initial binding of Lin28 to TL-let-7g. This stable binding of multiple Lin28 molecules to the terminal loop of pre-let-7g extends to other precursors of the let-7 family, but not to other pre-miRNAs tested. We propose a model for stepwise assembly of the 1:1, 1:2 and 1:3 pre-let-7g/Lin28 complexes. Stepwise multimerization of Lin28 on pre-let-7 is required for maximum inhibition of Dicer cleavage for a least one member of the let-7 family and may be important for orchestrating the activity of the several factors that regulate let-7 biogenesis.
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Affiliation(s)
- Alexandre Desjardins
- Département de Biochimie et Médecine Moléculaire, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
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A potentially functional polymorphism in the promoter region of let-7 family is associated with survival of hepatocellular carcinoma. Cancer Epidemiol 2013; 37:998-1002. [PMID: 24103425 DOI: 10.1016/j.canep.2013.09.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Revised: 09/05/2013] [Accepted: 09/05/2013] [Indexed: 01/09/2023]
Abstract
BACKGROUND The let-7 family plays a vital role in the normal cellular activity of liver cells and the carcinogenesis of hepatocellular carcinoma (HCC). In the previous study, we have detected the association between single nucleotide polymorphisms (SNPs) in the promoter region of let-7 and susceptibility to HCC. However, it is still unknown whether these polymorphisms are associated with HCC prognosis. METHODS We investigated the effect of two potentially functional SNPs in the promoter region of let-7 family, rs10877887 (T>C) and rs13293512 (T>C), on the overall survival of 331 HCC patients. Log-rank test and Cox proportional hazard models were used for the survival analyses. RESULTS We found that HCC patients carrying the C allele of rs10877887 had a significantly increased death risk (adjusted HR=1.22, 95%CI=1.02-1.47, P=0.03 in the additive model), compared to those with T allele. In the stratified analysis, the risk effect was evident in HCC patients with Barcelona Clinic Liver Cancer (BCLC) stage B (adjusted HR=1.24, 95%CI=1.02-1.51, P=0.03) and in those who received chemotherapy or intervention (adjusted HR=1.25, 95%CI=1.02-1.53, P=0.04). CONCLUSIONS Our results suggest that rs10877887 in the promoter region of let-7 may be a prognostic biomarker for HCC patients, which need the validation from other larger studies in different populations.
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Zhang J, Zhang L, Fan R, Guo N, Xiong C, Wang L, Jin S, Li W, Lu J. The polymorphism in the let-7 targeted region of the Lin28 gene is associated with increased risk of type 2 diabetes mellitus. Mol Cell Endocrinol 2013; 375:53-7. [PMID: 23660113 DOI: 10.1016/j.mce.2013.04.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 04/24/2013] [Accepted: 04/26/2013] [Indexed: 01/05/2023]
Abstract
Genetic polymorphisms in the miRNAs pathway of the pathogenesis of disease might contribute to the risk of disease. However, it is unclear whether these polymorphisms about miRNAs are associated with the risk of type 2 diabetes mellitus (T2DM). We performed a case-control study to investigate two polymorphisms in the let-7/Lin28 pathway based on 588 T2DM patients and 588 age and sex matched controls. The results showed that the rs3811463 polymorphism was associated with increased risk of T2DM (odds ratio (OR)=1.47, 95% confidence inference (95%CI)=1.13-1.93, P=0.005), while the rs3811464 not (OR=1.04, 95%CI=0.79-1.36, P=0.78). For the rs3811463 polymorphism, the variant genotypes were associated with increased risk of disease in females; statistically differences were observed in the clinical features of age at diagnosis, hypertension and peripheral neuropathy for the variant and wild genotype of the rs3811463 in T2DM. In summary, the results indicated that the rs3811463 polymorphism in the let-7/Lin28 pathway could significantly increase the risk of T2DM.
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Affiliation(s)
- Jie Zhang
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, Wenzhou Medical College, Wenzhou, Zhejiang 325035, China
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Sun X, Fan C, Du N, Ren H. Possible carcinogenesis of tumor suppressor let-7. Med Hypotheses 2013; 81:410-3. [PMID: 23790474 DOI: 10.1016/j.mehy.2013.05.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 05/01/2013] [Accepted: 05/23/2013] [Indexed: 10/26/2022]
Abstract
Cancer stem cells (CSCs), a group showing high capacities of sphere-forming and self renewal, are blamed for tumor initiation, recurrence and therapy resistance. Therefore, therapeutics specifically targeting and perishing CSCs may be promising. Let-7 miRNAs, one of the earliest discovered miRNAs, were considered as novel and vital agents to eliminate cancer and CSCs. However, in recent researches, many regulatory loops among let-7 and its targeted genes were noticed; the regulation of let-7 caused by its hunting mRNAs helped to form the hypotheses that hunters and preys may swap their roles when in confrontations. Besides, the evil side of let-7 was discovered occasionally, therefore, we hypothesize that dual characteristics of let-7 do exist, which will have significant impacts on anticancer research. Targeted therapies against cancer and CSCs by using let-7 or other miRNAs as weapons should be thought twice before clinical application.
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Affiliation(s)
- Xin Sun
- Oncology Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province 710061, PR China
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Murray MJ, Saini HK, Siegler CA, Hanning JE, Barker EM, van Dongen S, Ward DM, Raby KL, Groves IJ, Scarpini CG, Pett MR, Thornton CM, Enright AJ, Nicholson JC, Coleman N. LIN28 Expression in malignant germ cell tumors downregulates let-7 and increases oncogene levels. Cancer Res 2013; 73:4872-84. [PMID: 23774216 DOI: 10.1158/0008-5472.can-12-2085] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Despite their clinicopathologic heterogeneity, malignant germ cell tumors (GCT) share molecular abnormalities that are likely to be functionally important. In this study, we investigated the potential significance of downregulation of the let-7 family of tumor suppressor microRNAs in malignant GCTs. Microarray results from pediatric and adult samples (n = 45) showed that LIN28, the negative regulator of let-7 biogenesis, was abundant in malignant GCTs, regardless of patient age, tumor site, or histologic subtype. Indeed, a strong negative correlation existed between LIN28 and let-7 levels in specimens with matched datasets. Low let-7 levels were biologically significant, as the sequence complementary to the 2 to 7 nt common let-7 seed "GAGGUA" was enriched in the 3' untranslated regions of mRNAs upregulated in pediatric and adult malignant GCTs, compared with normal gonads (a mixture of germ cells and somatic cells). We identified 27 mRNA targets of let-7 that were upregulated in malignant GCT cells, confirming significant negative correlations with let-7 levels. Among 16 mRNAs examined in a largely independent set of specimens by quantitative reverse transcription PCR, we defined negative-associations with let-7e levels for six oncogenes, including MYCN, AURKB, CCNF, RRM2, MKI67, and C12orf5 (when including normal control tissues). Importantly, LIN28 depletion in malignant GCT cells restored let-7 levels and repressed all of these oncogenic let-7 mRNA targets, with LIN28 levels correlating with cell proliferation and MYCN levels. Conversely, ectopic expression of let-7e was sufficient to reduce proliferation and downregulate MYCN, AURKB, and LIN28, the latter via a double-negative feedback loop. We conclude that the LIN28/let-7 pathway has a critical pathobiologic role in malignant GCTs and therefore offers a promising target for therapeutic intervention.
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Affiliation(s)
- Matthew J Murray
- Department of Pathology, Cambridge University, Cambridge, United Kingdom.
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Sabarinathan R, Tafer H, Seemann SE, Hofacker IL, Stadler PF, Gorodkin J. The RNAsnp web server: predicting SNP effects on local RNA secondary structure. Nucleic Acids Res 2013; 41:W475-9. [PMID: 23630321 PMCID: PMC3977658 DOI: 10.1093/nar/gkt291] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The function of many non-coding RNA genes and cis-regulatory elements of messenger RNA largely depends on the structure, which is in turn determined by their sequence. Single nucleotide polymorphisms (SNPs) and other mutations may disrupt the RNA structure, interfere with the molecular function and hence cause a phenotypic effect. RNAsnp is an efficient method to predict the effect of SNPs on local RNA secondary structure based on the RNA folding algorithms implemented in the Vienna RNA package. The SNP effects are quantified in terms of empirical P-values, which, for computational efficiency, are derived from extensive pre-computed tables of distributions of substitution effects as a function of gene length and GC content. Here, we present a web service that not only provides an interface for RNAsnp but also features a graphical output representation. In addition, the web server is connected to a local mirror of the UCSC genome browser database that enables the users to select the genomic sequences for analysis and visualize the results directly in the UCSC genome browser. The RNAsnp web server is freely available at: http://rth.dk/resources/rnasnp/.
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Affiliation(s)
- Radhakrishnan Sabarinathan
- Center for non-coding RNA in Technology and Health, University of Copenhagen, Grønnegårdsvej 3, 1870 Frederiksberg C, Denmark
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Liu Q, Bai X, Li H, Zhang Y, Zhao Y, Zhang X, Ye L. The oncoprotein HBXIP upregulates Lin28Bviaactivating TF II D to promote proliferation of breast cancer cells. Int J Cancer 2013; 133:1310-22. [DOI: 10.1002/ijc.28154] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 02/22/2013] [Indexed: 12/26/2022]
Affiliation(s)
- Qian Liu
- Department of Biochemistry; College of Life Sciences; Nankai University; Tianjin; 300071; People's Republic of China
| | - Xiao Bai
- Department of Biochemistry; College of Life Sciences; Nankai University; Tianjin; 300071; People's Republic of China
| | - Hang Li
- Department of Biochemistry; College of Life Sciences; Nankai University; Tianjin; 300071; People's Republic of China
| | - Yingyi Zhang
- Department of Biochemistry; College of Life Sciences; Nankai University; Tianjin; 300071; People's Republic of China
| | - Yu Zhao
- Department of Biochemistry; College of Life Sciences; Nankai University; Tianjin; 300071; People's Republic of China
| | - Xiaodong Zhang
- Department of Cancer Research; Institute for Molecular Biology; College of Life Sciences; Nankai University; Tianjin; 300071; People's Republic of China
| | - Lihong Ye
- Department of Biochemistry; College of Life Sciences; Nankai University; Tianjin; 300071; People's Republic of China
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Shi TY, Cheng X, Yu KD, Sun MH, Shao ZM, Wang MY, Zhu ML, He J, Li QX, Chen XJ, Zhou XY, Wu X, Wei Q. Functional variants in TNFAIP8 associated with cervical cancer susceptibility and clinical outcomes. Carcinogenesis 2013; 34:770-8. [PMID: 23299407 DOI: 10.1093/carcin/bgt001] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Tumor necrosis factor-α-induced protein 8 (TNFAIP8) is an anti apoptotic and pro-oncogenic signaling molecule involved in the process of immunity, carcinogenesis and tumor progression. Single nucleotide polymorphisms (SNPs) at microRNA-binding sites may change messenger RNA target gene function, thus leading to cancer susceptibility and tumor progression. In this study of 1584 cervical cancer cases and 1394 cancer-free female controls, we investigated associations between three potentially functional SNPs in TNFAIP8 family genes and cervical cancer risk as well as platinum resistance and clinical outcomes in Eastern Chinese women. We found that the TNFAIP8-rs11064 variant GG genotype was associated with an increased risk of cervical cancer compared with AA/AG genotypes (adjusted odds ratio = 2.16, 95% confidence interval = 1.16-4.03, P = 0.015). Further in vitro and ex vivo functional experiments demonstrated that the TNFAIP8-rs11064 variant G allele weakened the binding affinity of miR-22 to the TNFAIP8 3'-untranslated region (UTR) in four cancer cell lines, resulting in increased production of the TNFAIP8 protein in the patients' cervical tissues. In the survival subset, the high TNFAIP8 protein expression was significantly associated with both resistance to cisplatin and nedaplatin, recurrence and death from cervical cancer. Taken together, in the absence of information on human papillomavirus (HPV) infection, the TNFAIP8-rs11064 SNP may function by affecting the affinity of miR-22 binding to the 3'-UTR of TNFAIP8 and regulating TNFAIP8 expression, thus contributing to cervical cancer risk. Additionally, the increased TNFAIP8 protein expression may predict platinum resistance and clinical outcomes in cervical cancer patients. Larger, prospective studies with detailed HPV infection data are warranted to validate our findings.
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Affiliation(s)
- Ting-Yan Shi
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China
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Shi TY, Chen XJ, Zhu ML, Wang MY, He J, Yu KD, Shao ZM, Sun MH, Zhou XY, Cheng X, Wu X, Wei Q. A pri-miR-218 variant and risk of cervical carcinoma in Chinese women. BMC Cancer 2013; 13:19. [PMID: 23320911 PMCID: PMC3585813 DOI: 10.1186/1471-2407-13-19] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 12/09/2012] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND MicroRNA (miRNA)-related single nucleotide polymorphisms (SNPs) may compromise miRNA binding affinity and modify mRNA expression levels of the target genes, thus leading to cancer susceptibility. However, few studies have investigated roles of miRNA-related SNPs in the etiology of cervical carcinoma. METHODS In this case-control study of 1,584 cervical cancer cases and 1,394 cancer-free female controls, we investigated associations between two miR-218-related SNPs involved in the LAMB3-miR-218 pathway and the risk of cervical carcinoma in Eastern Chinese women. RESULTS We found that the pri-miR-218 rs11134527 variant GG genotype was significantly associated with a decreased risk of cervical carcinoma compared with AA/AG genotypes (adjusted OR=0.77, 95% CI=0.63-0.95, P=0.015). However, this association was not observed for the miR-218 binding site SNP (rs2566) on LAMB3. Using the multifactor dimensionality reduction analysis, we observed some evidence of interactions of these two SNPs with other risk factors, especially age at primiparity and menopausal status, in the risk of cervical carcinoma. CONCLUSIONS The pri-miR-218 rs11134527 SNP was significantly associated with the risk of cervical carcinoma in Eastern Chinese women. Larger, independent studies are warranted to validate our findings.
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Affiliation(s)
- Ting-Yan Shi
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiao-Jun Chen
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Mei-Ling Zhu
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Meng-Yun Wang
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jing He
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ke-Da Yu
- Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhi-Ming Shao
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Meng-Hong Sun
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiao-Yan Zhou
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xi Cheng
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiaohua Wu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Qingyi Wei
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Epidemiology, The University of Texas M.D, Anderson Cancer Center, Houston, Texas, USA
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Ziebarth JD, Bhattacharya A, Cui Y. Integrative analysis of somatic mutations altering microRNA targeting in cancer genomes. PLoS One 2012; 7:e47137. [PMID: 23091610 PMCID: PMC3473044 DOI: 10.1371/journal.pone.0047137] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Accepted: 09/11/2012] [Indexed: 12/13/2022] Open
Abstract
Determining the functional impact of somatic mutations is crucial to understanding tumorigenesis and metastasis. Recent sequences of several cancers have provided comprehensive lists of somatic mutations across entire genomes, enabling investigation of the functional impact of somatic mutations in non-coding regions. Here, we study somatic mutations in 3'UTRs of genes that have been identified in four cancers and computationally predict how they may alter miRNA targeting, potentially resulting in dysregulation of the expression of the genes harboring these mutations. We find that somatic mutations create or disrupt putative miRNA target sites in the 3'UTRs of many genes, including several genes, such as MITF, EPHA3, TAL1, SCG3, and GSDMA, which have been previously associated with cancer. We also integrate the somatic mutations with germline mutations and results of association studies. Specifically, we identify putative miRNA target sites in the 3'UTRs of BMPR1B, KLK3, and SPRY4 that are disrupted by both somatic and germline mutations and, also, are in linkage disequilibrium blocks with high scoring markers from cancer association studies. The somatic mutation in BMPR1B is located in a target site of miR-125b; germline mutations in this target site have previously been both shown to disrupt regulation of BMPR1B by miR-125b and linked with cancer.
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Affiliation(s)
- Jesse D. Ziebarth
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
- Center for Integrative and Translational Genomics, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Anindya Bhattacharya
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
- Center for Integrative and Translational Genomics, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Yan Cui
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
- Center for Integrative and Translational Genomics, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
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Polymorphism rs4919510:C>G in mature sequence of human microRNA-608 contributes to the risk of HER2-positive breast cancer but not other subtypes. PLoS One 2012; 7:e35252. [PMID: 22586447 PMCID: PMC3346742 DOI: 10.1371/journal.pone.0035252] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Accepted: 03/14/2012] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND A few polymorphisms are located in the mature microRNA sequences. Such polymorphisms could directly affect the binding of microRNA to hundreds of target mRNAs. It remains unknown whether rs4919510:C>G located in the mature miR-608 alters breast cancer susceptibility. METHODS The association of rs4919510:C>G with risk and pathologic features of breast cancer were investigated in two independent case-control studies, the first set including 1,138 sporadic breast cancer patients (including 927 invasive ductal carcinoma patients, 777 of them with known subtypes: 496 luminal-like, 133 HER2-positive, and 148 triple-negative) and 1,434 community-based controls, and the second set including 294 familial/early-onset breast cancer patients and 500 hospital-based cancer-free controls. Odds ratios (ORs) were estimated by logistic regression. Predicted targets of miR-608 and complementary sequences containing rs4919510:C>G were surveyed to reveal potential pathological mechanism. RESULTS In the first set, although rs4919510:C>G was unrelated to breast cancer in general patients, variant genotypes (CG/GG) were specifically associated with increased risk of HER2-positive subtype (Adjusted OR = 1.97, 95% CI, 1.34-2.90 in the recessive model). Variant G-allele was the risk allele with OR of 1.62 (95% CI, 1.23-2.15). Patients carrying GG-genotype also had larger HER2-positive tumors (P for Kruskal-Wallis test = 0.006). The relationship between rs4919510:C>G and risk of HER2-positive subgroup was validated in the second set (Bonferroni corrected P = 0.06). The adjusted combined OR (total 164 HER2-positive cases) in the recessive model was 1.97 (95% CI, 1.43-2.72) for GG genotype (corrected P = 1.1 × 10(-4)). Bioinformatic analysis indicated that, HSF1, which is required for HER2-induced tumorigenesis, might be a target of miR-608. The minimum free-energy of ancestral-miR-608 (C-allele) binding to HSF1 is -35.9 kcal/mol, while that of variant-form (G-allele) is -31.5 kcal/mol, indicating a lower affinity of variant-miR-608 to HSF1 mRNA. CONCLUSION rs4919510:C>G in mature miR-608 may influence HER2-positive breast cancer risk and tumor proliferation.
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YUE JING, WU BULING, GAO JIE, HUANG XIN, LI CHANGXIA, MA DANDAN, FANG FUCHUN. DMP1 is a target of let-7 in dental pulp cells. Int J Mol Med 2012; 30:295-301. [DOI: 10.3892/ijmm.2012.982] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 04/05/2012] [Indexed: 11/06/2022] Open
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Li N, Zhong X, Lin X, Guo J, Zou L, Tanyi JL, Shao Z, Liang S, Wang LP, Hwang WT, Katsaros D, Montone K, Zhao X, Zhang L. Lin-28 homologue A (LIN28A) promotes cell cycle progression via regulation of cyclin-dependent kinase 2 (CDK2), cyclin D1 (CCND1), and cell division cycle 25 homolog A (CDC25A) expression in cancer. J Biol Chem 2012; 287:17386-17397. [PMID: 22467868 DOI: 10.1074/jbc.m111.321158] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The RNA-binding protein LIN28A regulates the translation and stability of a large number of mRNAs as well as the biogenesis of certain miRNAs in embryonic stem cells and developing tissues. Increasing evidence indicates that LIN28A functions as an oncogene promoting cancer cell growth. However, little is known about its molecular mechanism of cell cycle regulation in cancer. Using tissue microarrays, we found that strong LIN28A expression was reactivated in about 10% (7.1-17.1%) of epithelial tumors (six tumor types, n = 369). Both in vitro and in vivo experiments demonstrate that LIN28A promotes cell cycle progression in cancer cells. Genome-wide RNA-IP-chip experiments indicate that LIN28A binds to thousands of mRNAs, including a large group of cell cycle regulatory mRNAs in cancer and embryonic stem cells. Furthermore, the ability of LIN28A to stimulate translation of LIN28A-binding mRNAs, such as CDK2, was validated in vitro and in vivo. Finally, using a combined gene expression microarray and bioinformatics approach, we found that LIN28A also regulates CCND1 and CDC25A expression and that this is mediated by inhibiting the biogenesis of let-7 miRNA. Taken together, these results demonstrate that LIN28A is reactivated in about 10% of epithelial tumors and promotes cell cycle progression by regulation of both mRNA translation (let-7-independent) and miRNA biogenesis (let-7-dependent).
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Affiliation(s)
- Ning Li
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Xiaomin Zhong
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Xiaojuan Lin
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104; Department of Obstetrics and Gynecology, Second West China Hospital of Sichuan University, Chengdu, China
| | - Jinyi Guo
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Lian Zou
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104; Department of Obstetrics and Gynecology, Second West China Hospital of Sichuan University, Chengdu, China
| | - Janos L Tanyi
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Zhongjun Shao
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Shun Liang
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Li-Ping Wang
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Wei-Ting Hwang
- Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Dionyssios Katsaros
- Department of Obstetrics and Gynecology, University of Turin, Turin 10124, Italy
| | - Kathleen Montone
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Xia Zhao
- Department of Obstetrics and Gynecology, Second West China Hospital of Sichuan University, Chengdu, China
| | - Lin Zhang
- Ovarian Cancer Research Center and Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania 19104.
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Wang X, Cao L, Wang Y, Wang X, Liu N, You Y. Regulation of let-7 and its target oncogenes (Review). Oncol Lett 2012; 3:955-960. [PMID: 22783372 DOI: 10.3892/ol.2012.609] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 02/01/2012] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs (miRNAs) are highly evolutionarily-conserved non-coding small RNAs, which were first identified in Caenorhabditis elegans. Let-7 miRNA is involved in the regulation of gene expression in cells. Several novel factors and feedback loops involved in the regulation of the synthesis of let-7 have been identified and additional let-7 target genes have been found. Let-7 has also been shown to be significantly correlated with the occurrence and development of cancer and the results of preliminary studies suggest that it is involved in the regulation of oncogenic pathways in numerous types of tumors. Let-7 is, therefore, a potential molecular target for tumor therapy. Thus, this review examined let-7 and the correlation between let-7 and oncogenic pathways in cancer.
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Affiliation(s)
- Xirui Wang
- Department of Neurosurgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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