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Luo M, Chen Y, Yin X, Li J. Cribriform-morular Thyroid Carcinoma Arising in a Medulloblastoma Survivor: Two Metachronous Tumors Shared with the Activation of the Wnt Signaling Pathway. Int J Surg Pathol 2024:10668969241231971. [PMID: 38377966 DOI: 10.1177/10668969241231971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Wnt signaling pathway activation is involved in the pathogenesis of a series of malignant tumors and is characterized by the nuclear accumulation of β-catenin protein. The occurrence of two or more Wnt pathway-associated tumors in a single individual is uncommon and generally attributed to inherited cancer syndrome, especially familial adenomatous polyposis (FAP). Herein, we presented a rare case of a child who suffered from the occurrence of Wnt-activated medulloblastoma and cribriform-morular thyroid carcinoma (CMTC) within a 9-year interval. She had no history of FAP and harbored an unexpected somatic mutation of the APC gene in the CMTC tumor. The potential agents involved in the pathogenesis of the two molecular-linked tumors other than FAP were discussed in this report.
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Affiliation(s)
- Minghua Luo
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
| | - Yaoli Chen
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
| | - Xiaomin Yin
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
| | - Jian Li
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong Province, China
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Aghabozorgi AS, Ebrahimi R, Bahiraee A, Tehrani SS, Nabizadeh F, Setayesh L, Jafarzadeh-Esfehani R, Ferns GA, Avan A, Rashidi Z. The genetic factors associated with Wnt signaling pathway in colorectal cancer. Life Sci 2020; 256:118006. [PMID: 32593708 DOI: 10.1016/j.lfs.2020.118006] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/20/2020] [Accepted: 06/22/2020] [Indexed: 12/11/2022]
Abstract
Colorectal cancer (CRC) is a common cancer with poor prognosis and high mortality. There is growing information about the factors involved in the pathogenesis of CRC. However, the knowledge of the predisposing factors is limited. The development of CRC is strongly associated with the Wingless/Integrated (Wnt) signaling pathway. This pathway comprises several major target proteins, including LRP5/6, GSK3β, adenomatous polyposis coli (APC), axis inhibition protein (Axin), and β-catenin. Genetic variations in these components of the Wnt signaling pathway may lead to the activation of β-catenin, potentially increasing the proliferation of colorectal cells. Because of the potentially important role of the Wnt signaling pathway in CRC, we aimed to review the involvement of different mutations in the main downstream proteins of this pathway, including LRP5/6, APC, GSK3β, Axin, and β-catenin. Determination of the genetic risk factors involved in the progression of CRC may lead to novel approaches for the early diagnosis of CRC and the identification of potential therapeutic targets in the treatment of CRC.
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Affiliation(s)
- Amirsaeed Sabeti Aghabozorgi
- Medical Genetics Research Center, Basic Medical Sciences Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Reyhane Ebrahimi
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Students' Scientific Research Center (SSRC), Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Bahiraee
- Department of Medical Genetics, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Sadra Samavarchi Tehrani
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Students' Scientific Research Center (SSRC), Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Nabizadeh
- Department of Medical Genetics, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Leila Setayesh
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran; Students' Scientific Research Center (SSRC), Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Jafarzadeh-Esfehani
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gordon A Ferns
- Brighton & Sussex Medical School, Division of Medical Education, Falmer, Brighton, Sussex BN1 9PH, UK
| | - Amir Avan
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Zahra Rashidi
- Fertility and Infertility Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran; Department of Anatomical Sciences, Medical School, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Wang D, Zhang Z, Li Y, Xu C, Yu Y, Li M, Chen C, Zhang X. Adenomatous Polyposis Coli Gene Mutations in 22 Chinese Pedigrees with Familial Adenomatous Polyposis. Med Sci Monit 2019; 25:3796-3803. [PMID: 31113927 PMCID: PMC6542301 DOI: 10.12659/msm.913911] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background Familial adenomatous polyposis (FAP), which has a very high tendency of progression to colorectal cancer, is mainly caused by mutations of the adenomatous polyposis coli (APC) gene. This study systematically screened the APC mutations and observed the correlation of APC mutations with clinical manifestations of FAP. Material/Methods Eighty subjects (probands and their family members of 22 FAP pedigrees) were enrolled, underwent abdominal ultrasound, computed tomography, and colonoscopic examinations, and were assessed for APC mutations between January 2010 and June 2015 at Tianjin Union Medical Center. Peripheral blood was collected from subjects, and DNA was extracted and screened for APC mutations using multiplex ligation-dependent probe amplification for large-fragment deletions or PCR-denaturing high-performance liquid chromatography with DNA sequencing for micromutations. Results Nineteen of 22 FAP pedigrees were found to have mutations of APC, and 17 types APC mutations were identified. All the mutations were heterozygosity with autosomal dominant inheritance. APC mutations included 8 caused by frameshift, 3 by aberrant splicing, 2 by missense mutation, 2 by nonsense mutation, and 2 by large-fragment deletion. Frameshift mutation was the most common type of APC mutation, and Coding DNA Sequence 15 was the most common mutation site. Five novel APC mutations, including 1 with large-fragment deletion, were identified. Conclusions We systematically screened 17 mutations of APC from 22 Chinese pedigrees with FAP. This study will broaden the spectrum of known APC germline mutations and help understand the types and distribution of APC mutations among Chinese patients with FAP.
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Affiliation(s)
- Dan Wang
- Department of Pathology, Tianjin Medical University General Hospital, Tianjin, China (mainland)
| | - Zhao Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, China (mainland)
| | - Yuwei Li
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, China (mainland)
| | - Chen Xu
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, China (mainland)
| | - Yongjun Yu
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, China (mainland)
| | - Mingsen Li
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, China (mainland)
| | - Chao Chen
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, China (mainland)
| | - Xipeng Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, China (mainland)
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Ma DJ, Wang BS, Yue JB, Li ZJ, Sun YL. c.1439delA frameshift deletion mutation in familial adenomatous polyposis. Onco Targets Ther 2018; 11:8987-8993. [PMID: 30588011 PMCID: PMC6294057 DOI: 10.2147/ott.s183153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Familial adenomatous polyposis (FAP) is a rare autosomal dominant genetic disease related to germline mutations of the APC gene. The clinical features of this disease most commonly include hundreds of adenomas or polyps. If not treated in a timely fashion, FAP can eventually result in colorectal carcinoma. In this report, clinical manifestations, family history, relevant auxiliary examinations and gene detection from patient blood led us to discover a novel frameshift mutation in exon 12 of the APC gene. The deletion of adenine in c.1439 resulted in the formation of codon 480. The occurrence of this frameshift deletion may lead to inexpressibility of the main functional regions in APC and may affect gene function. In addition, colonoscopy and histopathology showed malignant changes in the colon and rectum. There have been no reports of this frameshift mutation, but it can be considered in case of APC mutations and FAP in patients with clinical manifestations; auxiliary examination may be related, and it may be used as a reference for preventive clinical treatment in the future.
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Affiliation(s)
- De-Jian Ma
- Department of Surgical Oncology, School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan 250062, China
| | - Bi-Shi Wang
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan 250117, China,
| | - Jin-Bo Yue
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan 250117, China
| | - Zeng-Jun Li
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan 250117, China,
| | - Yan-Lai Sun
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan 250117, China,
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Gao J, Zhao C, Liu Q, Hou X, Li S, Xing X, Yang C, Luo Y. Cyclin G2 suppresses Wnt/β-catenin signaling and inhibits gastric cancer cell growth and migration through Dapper1. J Exp Clin Cancer Res 2018; 37:317. [PMID: 30547803 PMCID: PMC6295076 DOI: 10.1186/s13046-018-0973-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 11/21/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Gastric cancer is one of the most common malignant tumors. Cyclin G2 has been shown to be associated with the development of multiple types of tumors, but its underlying mechanisms in gastric tumors is not well-understood. The aim of this study is to investigate the role and the underlying mechanisms of cyclin G2 on Wnt/β-catenin signaling in gastric cancer. METHODS Real-time PCR, immunohistochemistry and in silico assay were used to determine the expression of cyclin G2 in gastric cancer. TCGA datasets were used to evaluate the association between cyclin G2 expression and the prognostic landscape of gastric cancers. The effects of ectopic and endogenous cyclin G2 on the proliferation and migration of gastric cancer cells were assessed using the MTS assay, colony formation assay, cell cycle assay, wound healing assay and transwell assay. Moreover, a xenograft model and a metastasis model of nude mice was used to determine the influence of cyclin G2 on gastric tumor growth and migration in vivo. The effects of cyclin G2 expression on Wnt/β-catenin signaling were explored using a TOPFlash luciferase reporter assay, and the molecular mechanisms involved were investigated using immunoblots assay, yeast two-hybrid screening, immunoprecipitation and Duolink in situ PLA. Ccng2-/- mice were generated to further confirm the inhibitory effect of cyclin G2 on Wnt/β-catenin signaling in vivo. Furthermore, GSK-3β inhibitors were utilized to explore the role of Wnt/β-catenin signaling in the suppression effect of cyclin G2 on gastric cancer cell proliferation and migration. RESULTS We found that cyclin G2 levels were decreased in gastric cancer tissues and were associated with tumor size, migration and poor differentiation status. Moreover, overexpression of cyclin G2 attenuated tumor growth and metastasis both in vitro and in vivo. Dpr1 was identified as a cyclin G2-interacting protein which was required for the cyclin G2-mediated inhibition of β-catenin expression. Mechanically, cyclin G2 impacted the activity of CKI to phosphorylate Dpr1, which has been proved to be a protein that acts as a suppressor of Wnt/β-catenin signaling when unphosphorylated. Furthermore, GSK-3β inhibitors abolished the cyclin G2-induced suppression of cell proliferation and migration. CONCLUSIONS This study demonstrates that cyclin G2 suppresses Wnt/β-catenin signaling and inhibits gastric cancer cell growth and migration through Dapper1.
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Affiliation(s)
- Jinlan Gao
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Chenyang Zhao
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Qi Liu
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Xiaoyu Hou
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Sen Li
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Xuesha Xing
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Chunhua Yang
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
| | - Yang Luo
- The Research Center for Medical Genomics, School of Life Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province 110122 People’s Republic of China
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Han W, Wang Y, Fan J, Wang C. Is APC hypermethylation a diagnostic biomarker for bladder cancer? A meta-analysis. Onco Targets Ther 2018; 11:8359-8369. [PMID: 30568459 PMCID: PMC6267632 DOI: 10.2147/ott.s177601] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Objective Numerous studies have been performed to investigate the association between APC promoter hypermethylation and bladder cancer risk. Nevertheless, the conclusion was uncertain due to small sample size, different ethnicities, and tumor subtype. Hence, to accurately assess the effect of APC promoter hypermethylation on the risk of bladder cancer, we performed the meta-analysis. Materials and methods We retrieved the relevant literatures from electronic databases such as PubMed, Web of Science, Wanfang, Vapp, and CNKI (Chinese National Knowledge Infrastructure). 95% CI and OR were calculated to evaluate the associations of APC promoter hypermethylation with risk and clinical features of bladder cancer. Heterogeneity among studies was assessed with Q test and I 2 statistic. In addition, the diagnostic sensitivity, specificity, and area under the curve (AUC) value of APC hypermethylation for bladder cancer were calculated. Results In total, 14 articles with 531 controls and 1,293 cases were included to assess the associations of APC promoter hypermethylation with the risk and clinical characteristics of bladder cancer. The significant association between APC promoter hypermethylation and bladder cancer risk was detected (OR =17.01, CI =7.40-39.07). Furthermore, the results revealed that APC promoter hypermethylation was significantly correlated with the grade of bladder tumor (pTNM stage: OR =1.84, CI =0.87-3.93; grade: OR =4.11, CI =1.62-10.43). According to the results of diagnostic evaluation, the diagnostic sensitivity, specificity, and AUC value of APC hypermethylation for bladder cancer risk were 0.52 (95% CI =0.41-0.63), 0.98 (95% CI =0.90-1.00), and 0.80 (95% CI =0.76-0.83), respectively. Conclusion This meta-analysis revealed that APC promoter hypermethylation was a risk factor for bladder cancer risk. In addition, APC promoter hypermethylation was significantly associated with the grade of bladder cancer. APC hypermethylation might be a useful biomarker for the clinical diagnosis of bladder cancer.
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Affiliation(s)
- Wei Han
- Department of Pharmacy, Central Hospital of Zibo Mining Group Limited Liability Company, Zibo, China
| | - Yutao Wang
- Shandong Institute of Prevention and Control for Endemic Disease, Thyroid Disease Prevention and Control Center, Jinan, China,
| | - Jingli Fan
- Shandong Institute of Prevention and Control for Endemic Disease, Thyroid Disease Prevention and Control Center, Jinan, China,
| | - Chunlei Wang
- Shandong Institute of Prevention and Control for Endemic Disease, Thyroid Disease Prevention and Control Center, Jinan, China,
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Aghabozorgi AS, Bahreyni A, Soleimani A, Bahrami A, Khazaei M, Ferns GA, Avan A, Hassanian SM. Role of adenomatous polyposis coli (APC) gene mutations in the pathogenesis of colorectal cancer; current status and perspectives. Biochimie 2018; 157:64-71. [PMID: 30414835 DOI: 10.1016/j.biochi.2018.11.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 11/04/2018] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is one of the most common forms of solid tumors in the world with high rates of mortality and morbidity. Most cases of CRCs are initiated by inactivating mutations in a tumor suppressor gene, adenomatous polyposis coli (APC), leading to constitutive activation of the Wnt signaling pathway. This review summarizes the roles of somatic and germline mutations of the APC gene in hereditary as well as sporadic forms of CRC. We also discuss the diagnostic and prognostic value of the APC gene in the pathogenesis of CRC for a better understanding of CRC disease.
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Affiliation(s)
- Amirsaeed Sabeti Aghabozorgi
- Department of Human Genetics, Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran; Student Research Committee, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Amirhossein Bahreyni
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Atena Soleimani
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Afsane Bahrami
- Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Majid Khazaei
- Department of Medical Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gordon A Ferns
- Brighton & Sussex Medical School, Division of Medical Education, Falmer, Brighton, Sussex, BN1 9PH, UK
| | - Amir Avan
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Mahdi Hassanian
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
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Cheng Q, Zhao B, Huang Z, Su Y, Chen B, Yang S, Peng X, Ma Q, Yu X, Zhao B, Ke X. Epigenome-wide study for the offspring exposed to maternal HBV infection during pregnancy, a pilot study. Gene 2018. [PMID: 29526602 DOI: 10.1016/j.gene.2018.03.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND & AIM Hepatitis B virus (HBV) can be transmitted to infants, and is related to infants' later disease risk. Epigenetic change (such as DNA methylation) may be mechanism underlying the relationship. In this study, we aimed to investigate whether prenatal HBV infection could alter DNA methylation status in newborns. METHOD We selected 12 neonates with intrauterine HBV infection whose mothers were HBsAg-positive during pregnancy, relative to 12 HBV-free neonates with HBsAg-negative mothers. The pattern of genome-wide DNA methylation in the umbilical cord blood was investigated by Illumina Infinium Human Methylation 450K BeadChip. RESULT The average level of global methylation in infected neonates exposed to maternal HBV infection was not significantly different from controls. However, after adjusting for multiple comparisons, we found differential significance in the cases group compared to the controls for 663 CpG sites, associated with 534 genes. Among these sites, 53.85% (357/663) had decreased methylation (ΔM < 0) and 46.15% (306/663) had increased methylation (ΔM > 0). The average percentage change (Δβ) in methylation ranged from -46% to 36%. Validated by pyrosequencing, we identified 4 significantly differentially methylated CpG sites in the KLHL35 gene and additional CpGs for the CPT1B gene. These genes play a role in the development of hepatocellular and colorectal carcinoma and fatty acid oxidation, suggesting the candidature of these genes in HBV related disease. CONCLUSION Prenatal HBV exposure, even without malformation or preterm birth, may alter the epigenome profile in newborns. We identified a set of genes with differentially methylated CpG sites presented in the cord blood of HBV-infected newborns with HBsAg-positive mothers, demonstrating that DNA methylation status at birth can be used as a biomarker of prenatal exposure. These DNA methylation differences suggest a possible role for epigenetic processes in neonatal development in response to prenatal HBV exposure.
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Affiliation(s)
- Qijun Cheng
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China
| | - Bin Zhao
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China
| | - Zhenxiang Huang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China
| | - Yanhua Su
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China
| | - Biqin Chen
- Women and Children's medical center, Siming District, Xiamen, Fujian, China
| | - Songjing Yang
- Women and Children's medical center, Siming District, Xiamen, Fujian, China
| | - Xueqi Peng
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China
| | - Qilin Ma
- Neurology Department, the First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China
| | - Xiaoshan Yu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China
| | - Benhua Zhao
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China.
| | - Xiayi Ke
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Fujian, China.
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A novel pathogenic splice acceptor site germline mutation in intron 14 of the APC gene in a Chinese family with familial adenomatous polyposis. Oncotarget 2017; 8:21327-21335. [PMID: 28423518 PMCID: PMC5400587 DOI: 10.18632/oncotarget.15570] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 01/27/2017] [Indexed: 11/25/2022] Open
Abstract
Familial adenomatous polyposis (FAP) is an autosomal dominant precancerous condition, clinically characterized by the presence of multiple colorectal adenomas or polyps. Patients with FAP has a high risk of developing colorectal cancer (CRC) from these colorectal adenomatous polyps by the mean age of diagnosis at 40 years. Germline mutations of the APC gene cause familial adenomatous polyposis (FAP). Colectomy has recommended for the FAP patients with significant polyposis. Here, we present a clinical molecular study of a four generation Chinese family with FAP. Clinical diagnosis of FAP has been done according to the phenotype, family history and medical records. Patient's blood samples were collected and genomic DNA was extracted. In order to identify the pathogenic mutation underlying the disease phenotype targeted next-generation sequencing and confirmatory sanger sequencing has undertaken. Targeted next generation sequencing identified a novel heterozygous splice-acceptor site mutation [c.1744-1G>A] in intron 14 of APC gene, which is co-segregated with the FAP phenotypes in the proband and amongst all the affected family members. This mutation is not present in unaffected family members and in normal healthy controls of same ethnic origin. According to the LOVD database for Chinese colorectal cancer patients, in Chinese population, 60% of the previously reported APC gene mutations causes FAP, are missense mutations. This novel splice-acceptor site mutation causing FAP in this Chinese family expands the germline mutation spectrum of the APC gene in the Chinese population.
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Ghatak S, Chakraborty P, Sarkar SR, Chowdhury B, Bhaumik A, Kumar NS. Novel APC gene mutations associated with protein alteration in diffuse type gastric cancer. BMC MEDICAL GENETICS 2017; 18:61. [PMID: 28576136 PMCID: PMC5457612 DOI: 10.1186/s12881-017-0427-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 05/24/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND The role of adenomatous polyposis coli (APC) gene in mitosis might be critical for regulation of genomic stability and chromosome segregation. APC gene mutations have been associated to have a role in colon cancer and since gastric and colon tumors share some common genetic lesions, it is relevant to investigate the role of APC tumor suppressor gene in gastric cancer. METHODS We investigated for somatic mutations in the Exons 14 and 15 of APC gene from 40 diffuse type gastric cancersamples. Rabbit polyclonal anti-APC antibody was used, which detects the wild-type APC protein and was recommended for detection of the respective protein in human tissues. Cell cycle analysis was done from tumor and adjacent normal tissue. RESULTS APC immunoreactivity showed positive expression of the protein in stages I, II, III and negative expression in Stages III and IV. Two novel deleterious variations (g.127576C > A, g.127583C > T) in exon 14 sequence were found to generate stop codon (Y622* and Q625*)in the tumor samples. Due to the generation of stop codon, the APC protein might be truncated and all the regulatory features could be lost which has led to the down-regulation of protein expression. Our results indicate that aneuploidy might occurdue to the codon 622 and 625 APC-driven gastric tumorigenesis, in agreement with our cell cycle analysis. The APC gene function in mitosis and chromosomal stability might be lost and G1 might be arrested with high quantity of DNA in the S phase. Six missense somatic mutations in tumor samples were detected in exon 15 A-B, twoof which showed pathological and disease causing effects based on SIFT, Polyphen2 and SNPs & GO score and were not previously reported in the literature or the public mutation databases. CONCLUSION The two novel pathological somatic mutations (g.127576C > A, g.127583C > T) in exon 14 might be altering the protein expression leading to development of gastric cancer in the study population. Our study showed that mutations in the APC gene alter the protein expression and cell cycle regulation in diffuse type gastric adenocarcinoma.
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Affiliation(s)
- Souvik Ghatak
- Department of Biotechnology, Mizoram University, Aizawl, 796004 Mizoram India
| | - Payel Chakraborty
- Department of Biotechnology, Mizoram University, Aizawl, 796004 Mizoram India
| | - Sandeep Roy Sarkar
- Department of Pathology, Agartala Government Medical College, Tripura, India
| | - Biswajit Chowdhury
- Department of Pathology, Agartala Government Medical College, Tripura, India
| | - Arup Bhaumik
- Department of Pathology, Agartala Government Medical College, Tripura, India
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