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Zhang Y, Yu Y, Su X, Lu Y. HOXD8 inhibits the proliferation and migration of triple-negative breast cancer cells and induces apoptosis in them through regulation of AKT/mTOR pathway. Reprod Biol 2021; 21:100544. [PMID: 34454307 DOI: 10.1016/j.repbio.2021.100544] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/04/2021] [Accepted: 08/06/2021] [Indexed: 10/20/2022]
Abstract
HOXD8 (Homeobox D8) functions as an apoptotic inducer to suppress tumor progression. However, the role of HOXD8 in triple-negative breast cancer (TNBC) has not been fully understood. Firstly, HOXD8 was found to be reduced in TNBC tissues based on the TCGA samples through Ualcan (http://ualcan.path.uab.edu/analysis.html) prediction. Moreover, data from qRT-PCR and western blot confirmed the lower expression of HOXD8 in the TNBC tissues or cells than that in paracancerous tissues or human mammary epithelial cell line (MCF10A), respectively. Secondly, pcDNA-mediated over-expression of HOXD8 were conducted in TNBC cells, and the gain-of functional assays showed that over-expression of HOXD8 promoted TNBC cell progression with repressed cell apoptosis and induced proliferation, migration and invasion. Moreover, xenografted mouse model was constructed by injection of tumor cell line with stable over-expression of HOXD8 to assess the in vivo tumor growth, and the results revealed that over-expression of HOXD8 inhibited tumor growth. Lastly, our results showed that AKT and mTOR phosphorylation were repressed by HOXD8 over-expression in TNBC cells. In conclusion, HOXD8 functioned as an apoptotic inducer to suppress TNBC cell growth and progression by inhibition of AKT/mTOR pathway.
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Affiliation(s)
- Yixin Zhang
- Department of Thyroid and Breast Surgery, the Affiliated Peoples Hospital of Ningbo University, Ningbo City, Zhejiang Province, 315040, China
| | - Yu Yu
- Department of Thyroid and Breast Surgery, the Affiliated Peoples Hospital of Ningbo University, Ningbo City, Zhejiang Province, 315040, China
| | - Xiaobao Su
- Department of Thyroid and Breast Surgery, the Affiliated Peoples Hospital of Ningbo University, Ningbo City, Zhejiang Province, 315040, China
| | - Yuqin Lu
- Department of Nail Breast Surgery, Huai'an Second People's Hospital, Huai'an City, Jiangsu Province, 223002, China.
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Prasad R, Yen TJ, Bellacosa A. Active DNA demethylation-The epigenetic gatekeeper of development, immunity, and cancer. ADVANCED GENETICS (HOBOKEN, N.J.) 2020; 2:e10033. [PMID: 36618446 PMCID: PMC9744510 DOI: 10.1002/ggn2.10033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/16/2020] [Accepted: 10/16/2020] [Indexed: 01/11/2023]
Abstract
DNA methylation is a critical process in the regulation of gene expression with dramatic effects in development and continually expanding roles in oncogenesis. 5-Methylcytosine was once considered to be an inherited and stably repressive epigenetic mark, which can be only removed by passive dilution during multiple rounds of DNA replication. However, in the past two decades, physiologically controlled DNA demethylation and deamination processes have been identified, thereby revealing the function of cytosine methylation as a highly regulated and complex state-not simply a static, inherited signature or binary on-off switch. Alongside these fundamental discoveries, clinical studies over the past decade have revealed the dramatic consequences of aberrant DNA demethylation. In this review we discuss DNA demethylation and deamination in the context of 5-methylcytosine as critical processes for physiological and physiopathological transitions within three states-development, immune maturation, and oncogenic transformation; and we describe the expanding role of DNA demethylating drugs as therapeutic agents in cancer.
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Affiliation(s)
- Rahul Prasad
- Cancer Epigenetics and Cancer Biology Programs, Fox Chase Cancer CenterPhiladelphiaPennsylvaniaUSA
| | - Timothy J. Yen
- Cancer Epigenetics and Cancer Biology Programs, Fox Chase Cancer CenterPhiladelphiaPennsylvaniaUSA
| | - Alfonso Bellacosa
- Cancer Epigenetics and Cancer Biology Programs, Fox Chase Cancer CenterPhiladelphiaPennsylvaniaUSA
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Gargallo P, Yáñez Y, Segura V, Juan A, Torres B, Balaguer J, Oltra S, Castel V, Cañete A. Li-Fraumeni syndrome heterogeneity. Clin Transl Oncol 2019; 22:978-988. [PMID: 31691207 DOI: 10.1007/s12094-019-02236-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/21/2019] [Indexed: 02/07/2023]
Abstract
Clinical variability is commonly seen in Li-Fraumeni syndrome. Phenotypic heterogeneity is present among different families affected by the same pathogenic variant in TP53 gene and among members of the same family. However, causes of this huge clinical spectrum have not been studied in depth. TP53 type mutation, polymorphic variants in TP53 gene or in TP53-related genes, copy number variations in particular regions, and/or epigenetic deregulation of TP53 expression might be responsible for clinical heterogeneity. In this review, recent advances in the understanding of genetic and epigenetic aspects influencing Li-Fraumeni phenotype are discussed.
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Affiliation(s)
- P Gargallo
- Pediatric Oncology, La Fe Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain.
| | - Y Yáñez
- Clinical and Translational Oncology Research Group, La Fe Hospital, Valencia, Spain
| | - V Segura
- Clinical and Translational Oncology Research Group, La Fe Hospital, Valencia, Spain
| | - A Juan
- Pediatric Oncology, La Fe Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - B Torres
- Pediatric Oncology, La Fe Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - J Balaguer
- Pediatric Oncology, La Fe Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - S Oltra
- Genetics Unit, La Fe Hospital, Valencia, Spain.,Genetics Department, Valencia University, Valencia, Spain
| | - V Castel
- Pediatric Oncology, La Fe Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - A Cañete
- Pediatric Oncology, La Fe Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
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Gibbon S. Calibrating cancer risk, uncertainty and environments: Genetics and their contexts in southern Brazil. BIOSOCIETIES 2018; 13:761-779. [PMID: 30976288 PMCID: PMC6453108 DOI: 10.1057/s41292-017-0095-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Drawing on empirical ethnographic research in Brazil this paper examines how in the spaces between identifying genetic markers and conditional cancer risk, environments and diverse epigenetic logics are emerging and being negotiated among research and clinical communities, patients and their families. Focusing on an arena of research and medical intervention related to a gene variant known as R337h, thought to occur with high frequency in the south of Brazil and linked to the cancer syndrome Li-Fraumeni, it emphasises the relevance of examining epigenetics as an emic category but also its utility as an analytic category. It shows how in a context of not yet fully knowing how and in what ways R337h contributes to increased cancer, a range of different 'environments' are invoked that unevenly articulate an emerging and still inchoate and unfolding terrain of understanding. In an arena of expanding genomic research and medicine, where the identification of low risk mutations associated with cancer is increasingly common, the Brazilian case provides a particular lens on the way environments and genes are being meaningfully calibrated and how differently implicated communities resourcefully populate the gaps in knowledge and understanding with consequences for research, care and embodied risk.
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Xu X, Watt DS, Liu C. Multifaceted roles for thymine DNA glycosylase in embryonic development and human carcinogenesis. Acta Biochim Biophys Sin (Shanghai) 2016; 48:82-9. [PMID: 26370152 DOI: 10.1093/abbs/gmv083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 07/12/2015] [Indexed: 01/03/2023] Open
Abstract
Thymine DNA glycosylase (TDG) is a multifunctional protein that plays important roles in DNA repair, DNA demethylation, and transcriptional regulation. These diverse functions make TDG a unique enzyme in embryonic development and carcinogenesis. This review discusses the molecular function of TDG in human cancers and the previously unrecognized value of TDG as a potential target for drug therapy.
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Affiliation(s)
- Xuehe Xu
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky, Lexington, KY 40536-0509, USA
| | - David S Watt
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky, Lexington, KY 40536-0509, USA
| | - Chunming Liu
- Department of Molecular and Cellular Biochemistry, Markey Cancer Center, University of Kentucky, Lexington, KY 40536-0509, USA
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