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Moeurng S, Posridee K, Kamkaew A, Thaiudom S, Oonsivilai A, Oonsivilai R. Identification of Pheophytin a and Hydroxy Pheophytin a from Rang Chuet ( Thunbergia laurifolia Linn.) as Potent NQO-1 Inducers in Liver Cells. Foods 2024; 13:1443. [PMID: 38790743 PMCID: PMC11119997 DOI: 10.3390/foods13101443] [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: 04/14/2024] [Revised: 05/01/2024] [Accepted: 05/03/2024] [Indexed: 05/26/2024] Open
Abstract
Thunbergia laurifolia Linn. (Rang Chuet, RC), a Thai medicinal plant, possesses various bioactive compounds with potential health benefits. This study aimed to identify detoxifying compounds within RC crude extract. RC leaves were extracted using the Soxhlet method with chloroform. Total carotenoids, chlorophylls, extract yield, total phenolic contents (TPCs), and total flavonoid contents (TFCs) were measured. The extract's composition was analyzed. Cytotoxicity and effects on the detoxification enzyme NQO-1 were assessed in liver cell lines (AML12 and HepG2) using MTT and NQO-1 assays, respectively. Bioactive fractions were identified using fractionation techniques and mass spectrometry (LC-MS). RC extract displayed significant levels of carotenoids (0.375 mg/g), chlorophylls (2.682 mg/g), and favorable yield (15.3%). TPC and TFC were 363.776 mg/g and 112.22 mg/g of extract, respectively. Analysis revealed phenolic acids (gallic acid, caffeic acid), flavonoid (apigenin), chlorophylls (chlorophylls a, b, pheophytin a and b), and lutein. Among the fractions, Fraction 3 (F3) exhibited the highest NQO-1 enzyme activity. F3 contained pheophytin a and hydroxy pheophytin a, confirmed by LC-MS (m/z 871.59+ [M + H]+ and 887.59+ [M + H]+). F3 significantly induced NQO-1 activity in both HepG2 (3.908-fold) and AML12 (1.99-fold) cells. This study identified F3 from RC extract as a promising fraction containing pheophytin a and hydroxy pheophytin a, responsible for inducing the detoxification enzyme NQO-1 in liver cells. These findings suggest RC's potential for promoting detoxification.
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Affiliation(s)
- Sreylak Moeurng
- Department of Bioengineering, Faculty of Engineering, Royal University of Phnom Penh, Phnom Penh 12156, Cambodia;
| | - Kakanang Posridee
- Health and Wellness Research Group, School of Food Technology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand; (K.P.); (S.T.)
| | - Anyanee Kamkaew
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand;
| | - Siwatt Thaiudom
- Health and Wellness Research Group, School of Food Technology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand; (K.P.); (S.T.)
| | - Anant Oonsivilai
- School of Electrical Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Ratchadaporn Oonsivilai
- Health and Wellness Research Group, School of Food Technology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand; (K.P.); (S.T.)
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Li M, Zheng Y, Li X, Shen X, Zhang T, Weng B, Mao H, Zhao J. ATBF1 is a potential diagnostic marker of histological grade and functions via WNT5A in breast cancer. BMC Cancer 2022; 22:1280. [PMID: 36476423 PMCID: PMC9727999 DOI: 10.1186/s12885-022-10380-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Histological grade has been demonstrated to be an important factor of breast cancer outcome and is associated with cell differentiation and is currently being evaluated via H&E-stained sections. Molecular biomarkers are essential to improve the accuracy of histological grading. ATBF1, a large transcription factor, has been considered a tumor suppressor gene with frequent mutations or deletions in multiple cancers. In breast cancer, ATBF1 was reported to function in cell differentiation and mammary development. However, its role in the clinic has rarely been reported. METHODS Breast cancer tissues (BCTs) and adjacent noncancerous tissues (ANCTs) were collected to analyze the expression of ATBF1 at the mRNA and protein levels. Three anti-ATBF1 antibodies recognizing independent peptides of ATBF1 (N-terminal end, middle region and C-terminal end) were applied for IHC staining. Small interfering RNA (siRNA) was used to silence ATBF1 expression and to investigate the roles of ATBF1 in MCF7 cells. Microarrays were introduced to analyze the differentially expressed genes, enriched GO terms and KEGG terms regulated by ATBF1 and its potential downstream genes, which were further confirmed in vitro and in clinical samples. RESULTS The expression of ATBF1 was reduced in BCTs at both the mRNA and protein levels compared with that in ANCTs. ATBF1 protein was predominantly localized in the nucleus of ANCTs but in the cytoplasm of BCTs. Both the mRNA and protein levels of ATBF1 were significantly correlated with histological grade. Consistently, knockdown of ATBF1 increased stemness marker expression and reduced differentiation markers in vitro. Further analysis identified WNT5A as an essential downstream gene of ATBF1 in breast cancer cells. Treatment of WNT5A disrupted cell proliferation induced by ATBF1 silencing. In BCTs, a significant correlation was observed between the expression of WNT5A and ATBF1. CONCLUSION The results indicated that ATBF1 expression might be a useful diagnostic marker associated with histological grade and breast cancer malignancy. WNT5A and its signaling pathway are novel mechanisms by which ATBF1 contributes to breast cancer tumorigenesis.
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Affiliation(s)
- Mei Li
- grid.203507.30000 0000 8950 5267Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang 315211 China ,Ningbo Institute of Medical Sciences, Ningbo, Zhejiang China
| | - Yanan Zheng
- grid.203507.30000 0000 8950 5267Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang 315211 China
| | - Xujun Li
- grid.9227.e0000000119573309Department of Breast Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang China
| | - Xiaohan Shen
- Ningbo Diagnostic Pathology Center, Ningbo, Zhejiang China
| | - Tingxia Zhang
- grid.203507.30000 0000 8950 5267Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang 315211 China
| | - Bowen Weng
- grid.203507.30000 0000 8950 5267Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang 315211 China
| | - Haijiao Mao
- grid.203507.30000 0000 8950 5267Department of Orthopaedic Surgery, the Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang China
| | - Jiyuan Zhao
- grid.203507.30000 0000 8950 5267Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang 315211 China
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Pedro B, Rupji M, Dwivedi B, Kowalski J, Konen JM, Owonikoko TK, Ramalingam SS, Vertino PM, Marcus AI. Prognostic significance of an invasive leader cell-derived mutation cluster on chromosome 16q. Cancer 2020; 126:3140-3150. [PMID: 32315457 PMCID: PMC7275903 DOI: 10.1002/cncr.32903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/11/2020] [Accepted: 03/17/2020] [Indexed: 11/06/2022]
Abstract
BACKGROUND Intratumoral heterogeneity is defined by subpopulations with varying genotypes and phenotypes. Specialized, highly invasive leader cells and less invasive follower cells are phenotypically distinct subpopulations that cooperate during collective cancer invasion. Because leader cells are a rare subpopulation that would be missed by bulk sequencing, a novel image-guided genomics platform was used to precisely select this subpopulation. This study identified a novel leader cell mutation signature and tested its ability to predict prognosis in non-small cell lung cancer (NSCLC) patient cohorts. METHODS Spatiotemporal genomic and cellular analysis was used to isolate and perform RNA sequencing on leader and follower populations from the H1299 NSCLC cell line, and it revealed a leader-specific mutation cluster on chromosome 16q. Genomic data from patients with lung squamous cell carcinoma (LUSC; n = 475) and lung adenocarcinoma (LUAD; n = 501) from The Cancer Genome Atlas were stratified by 16q mutation cluster (16qMC) status (16qMC+ vs 16qMC-) and compared for overall survival (OS), progression-free survival (PFS), and gene set enrichment analysis (GSEA). RESULTS Poorer OS, poorer PFS, or both were found across all stages and among early-stage patients with 16qMC+ tumors within the LUSC and LUAD cohorts. GSEA revealed 16qMC+ tumors to be enriched for the expression of metastasis- and survival-associated gene sets. CONCLUSIONS This represents the first leader cell mutation signature identified in patients and has the potential to better stratify high-risk NSCLC and ultimately improve patient outcomes.
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Affiliation(s)
- Brian Pedro
- Graduate Program in Cancer Biology, Emory University, Atlanta, Georgia
| | - Manali Rupji
- Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Bhakti Dwivedi
- Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Jeanne Kowalski
- Winship Cancer Institute, Emory University, Atlanta, Georgia.,Department of Biostatistics and Bioinformatics, Emory University, Atlanta, Georgia
| | - Jessica M Konen
- Graduate Program in Cancer Biology, Emory University, Atlanta, Georgia
| | - Taofeek K Owonikoko
- Winship Cancer Institute, Emory University, Atlanta, Georgia.,Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia
| | - Suresh S Ramalingam
- Winship Cancer Institute, Emory University, Atlanta, Georgia.,Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia
| | - Paula M Vertino
- Department of Radiation Oncology, Emory University, Atlanta, Georgia.,Department of Biomedical Genetics and Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, New York
| | - Adam I Marcus
- Winship Cancer Institute, Emory University, Atlanta, Georgia.,Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia
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Role of columnar cell lesions in breast carcinogenesis: analysis of chromosome 16 copy number changes by multiplex ligation-dependent probe amplification. Mod Pathol 2018; 31:1816-1833. [PMID: 29976944 DOI: 10.1038/s41379-018-0099-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 05/31/2018] [Accepted: 06/01/2018] [Indexed: 11/08/2022]
Abstract
Columnar cell lesions have been proposed as precursor lesions of low-grade breast cancer. The molecular characteristic of low-grade breast neoplasia is whole-arm loss of chromosome 16q. Copy number changes of 6 genes on 16p and 20 genes on 16q were analysed by multiplex ligation-dependent probe amplification in 165 lesions of 103 patients. Twenty-three columnar cell lesions and 19 atypical ducal hyperplasia lesions arising in columnar cell lesions were included, as well as cases of usual ductal hyperplasia, blunt duct adenosis, ductal carcinoma in situ, lobular neoplasia and invasive carcinoma. Usual ductal hyperplasia and blunt duct adenosis lacked whole-arm losses of 16q. In contrast, columnar cell lesions without atypia, columnar cell lesions with atypia, atypical ductal hyperplasia, low-grade ductal carcinoma in situ and low-grade invasive carcinomas increasingly harboured whole-arm losses of 16q (17%, 27%, 47% and 57%, respectively). However, no recurrent losses in specific genes could be identified. In several patients, columnar cell lesions and atypical ductal hyperplasia harboured similar losses as related ductal carcinoma in situ or invasive carcinomas within the same breast. There were indications for 16q breakpoints near the centromere. Whole-arm gains on 16p were relatively scarce and there was no relation between whole-arm gains of 16p and progression of lesions of the low-grade breast neoplasia family. In conclusion, columnar cell lesions (with and without atypia) often harbour whole-arm losses of 16q, which underlines their role as precursors in low-grade breast carcinogenesis, in contrast with usual ductal hyperplasia and blunt duct adenosis. However, no recurrent losses in specific genes could be identified, pointing to minor events in multiple tumour suppressor genes rather than major events in a single 16q gene contributing to low-grade breast carcinogenesis.
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Li M, Zhang C, Zhong Y, Zhao J. Cellular localization of ATBF1 protein and its functional implication in breast epithelial cells. Biochem Biophys Res Commun 2017. [DOI: 10.1016/j.bbrc.2017.06.068] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Zaw KTT, Sato N, Ikeda S, Thu KS, Mieno MN, Arai T, Mori S, Furukawa T, Sasano T, Sawabe M, Tanaka M, Muramatsu M. Association of ZFHX3 gene variation with atrial fibrillation, cerebral infarction, and lung thromboembolism: An autopsy study. J Cardiol 2016; 70:180-184. [PMID: 28007413 DOI: 10.1016/j.jjcc.2016.11.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/28/2016] [Accepted: 11/11/2016] [Indexed: 01/08/2023]
Abstract
AIM We aimed to study a single nucleotide polymorphism (SNP), rs2106261, in the transcription factor gene, ZFHX3, in atrial fibrillation (AF) and other related phenotypes by phenome scanning in a Japanese population. METHOD We retrieved consecutive autopsy data (n=2433, mean age=80 years) from the Japanese SNP database for geriatric diseases (JG-SNP). Clinical data, including an AF diagnosis, were collected from medical charts. Genotyping was performed with the DNA chip method. We also analyzed 42 pathological and 26 clinical phenotypes, including cerebral infarctions (CIs) and lung thromboembolisms (LTs), diagnosed by macroscopic inspection during the autopsy. RESULT Among the 2433 patients with available data, 18.6% had AF, 29.4% had CI, and 4.9% had LT phenotypes. The A allele of the rs2106261 SNP was significantly associated with AF, after adjusting for age, sex, diabetes, hypertension, and smoking (AA+AG/GG, OR=1.51, 95%CI: 1.16-1.97, p=0.002). In the entire cohort, CI was not associated with rs2106261 (p=0.14). However, among patients under 80 years old, rs2106261 was significantly associated with CI (AA+AG/GG, OR=1.57, 95%CI: 1.09-2.26, p=0.01). LT was also associated with rs2106261 (AA+AG/GG, OR=1.99, 95%CI: 1.31-3.01, p=0.001). Associations between rs2106261 and CI and LT remained positive after adjusting for the presence of AF, which indicated that this SNP variant might serve as an independent risk marker. CONCLUSION We showed that the ZFHX3 polymorphism, rs2106261 (A allele), was a risk marker for AF and AF-related phenotypes. The roles of this variant in the development of AF and its related phenotypes warrant further investigation.
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Affiliation(s)
- Khin Thet Thet Zaw
- Department of Molecular Epidemiology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Noriko Sato
- Department of Molecular Epidemiology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shinobu Ikeda
- Data Science Department, JCRAC Data Center, Clinical Research Center, National Medical Research Center Hospital, Tokyo, Japan
| | - Kaung Si Thu
- Department of Molecular Epidemiology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Makiko Naka Mieno
- Department of Medical Informatics, Center of Information, Jichii Medical University, Tochigi, Japan
| | - Tomio Arai
- Department of Pathology, Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan; Research Team for Geriatric Pathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Seijiro Mori
- Center for Promotion of Clinical Investigation, Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan
| | - Tetsushi Furukawa
- Department of Bioinformational Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tetsuo Sasano
- Department of Biofunctional Informatics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motoji Sawabe
- Department of Moleculo-genetic Sciences, Division of Biomedical Laboratory Sciences, Molecular Pathophysiology, Graduate School of Health Care Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masashi Tanaka
- Department of Clinical Laboratory, Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan
| | - Masaaki Muramatsu
- Department of Molecular Epidemiology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
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Overexpression of NAD(P)H:quinone oxidoreductase 1 (NQO1) and genomic gain of the NQO1 locus modulates breast cancer cell sensitivity to quinones. Life Sci 2015; 145:57-65. [PMID: 26687450 DOI: 10.1016/j.lfs.2015.12.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 11/04/2015] [Accepted: 12/07/2015] [Indexed: 01/28/2023]
Abstract
AIMS Alterations in the expression of antioxidant enzymes are associated with changes in cancer cell sensitivity to chemotherapeutic drugs (menadione and β-lapachone). Mechanisms of acquisition of resistance to pro-oxidant drugs were investigated using a model of oxidative stress-resistant MCF-7 breast cancer cells (Resox cells). MAIN METHODS FISH experiments were performed in tumor biopsy and breast cancer cells to characterize the pattern of the NQO1 gene. SNP-arrays were conducted to detect chromosomal imbalances. Finally, the importance of NQO1 overexpression in the putative acquisition of either drug resistance or an increased sensitivity to quinones by cancer cells was investigated by immunoblotting and cytotoxicity assays. KEY FINDINGS Genomic gain of the chromosomal band 16q22 was detected in Resox cells compared to parental breast cancer MCF-7 cells and normal human mammary epithelial 250MK cells. This genomic gain was associated with amplification of the NQO1 gene in one tumor biopsy as well as in breast cancer cell lines. Using different breast cell models, we found that NQO1 overexpression was a main determinant for a potential chemotherapy resistance or an increased sensitivity to quinone-bearing compounds. SIGNIFICANCE Because NQO1 is frequently modified in tumors at genomic and transcriptomic levels, the impact of NQO1 modulation on breast cancer cell sensitivity places NQO1 as a potential link between cancer redox alterations and resistance to chemotherapy. Thus, the NQO1 gene copy number and NQO1 activity should be considered when quinone-bearing molecules are being utilized as potential drugs against breast tumors.
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Zhang X, Wu X, Jia W, Pan C, Li X, Lei C, Chen H, Lan X. Novel Nucleotide Variations, Haplotypes Structure and Associations with Growth Related Traits of Goat AT Motif-Binding Factor (ATBF1) Gene. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2015; 28:1394-406. [PMID: 26323396 PMCID: PMC4554846 DOI: 10.5713/ajas.14.0860] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 03/11/2015] [Accepted: 04/01/2015] [Indexed: 01/05/2023]
Abstract
The AT motif-binding factor (ATBF1) not only interacts with protein inhibitor of activated signal transducer and activator of transcription 3 (STAT3) (PIAS3) to suppress STAT3 signaling regulating embryo early development and cell differentiation, but is required for early activation of the pituitary specific transcription factor 1 (Pit1) gene (also known as POU1F1) critically affecting mammalian growth and development. The goal of this study was to detect novel nucleotide variations and haplotypes structure of the ATBF1 gene, as well as to test their associations with growth-related traits in goats. Herein, a total of seven novel single nucleotide polymorphisms (SNPs) (SNP 1-7) within this gene were found in two well-known Chinese native goat breeds. Haplotypes structure analysis demonstrated that there were four haplotypes in Hainan black goat while seventeen haplotypes in Xinong Saanen dairy goat, and both breeds only shared one haplotype (hap1). Association testing revealed that the SNP2, SNP5, SNP6, and SNP7 loci were also found to significantly associate with growth-related traits in goats, respectively. Moreover, one diplotype in Xinong Saanen dairy goats significantly linked to growth related traits. These preliminary findings not only would extend the spectrum of genetic variations of the goat ATBF1 gene, but also would contribute to implementing marker-assisted selection in genetics and breeding in goats.
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Affiliation(s)
- Xiaoyan Zhang
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xianfeng Wu
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Wenchao Jia
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chuanying Pan
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiangcheng Li
- Institute of Beijing Animal Science and Veterinary, Chinese Academy of Agricultural Science, Beijing 100194, China
| | - Chuzhao Lei
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hong Chen
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xianyong Lan
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
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TGF- β Signaling Cooperates with AT Motif-Binding Factor-1 for Repression of the α -Fetoprotein Promoter. JOURNAL OF SIGNAL TRANSDUCTION 2014; 2014:970346. [PMID: 25105025 PMCID: PMC4106063 DOI: 10.1155/2014/970346] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 05/23/2014] [Indexed: 12/21/2022]
Abstract
α-Fetoprotein (AFP) is known to be highly produced in fetal liver despite its barely detectable level in normal adult liver. On the other hand, hepatocellular carcinoma often shows high expression of AFP. Thus, AFP seems to be an oncogenic marker. In our present study, we investigated how TGF-β signaling cooperates with AT motif-binding factor-1 (ATBF1) to inhibit AFP transcription. Indeed, the expression of AFP mRNA in HuH-7 cells was negatively regulated by TGF-β signaling. To further understand how TGF-β suppresses the transcription of the AFP gene, we analyzed the activity of the AFP promoter in the presence of TGF-β. We found that the TGF-β signaling and ATBF1 suppressed AFP transcription through two ATBF1 binding elements (AT-motifs). Using a heterologous reporter system, both AT-motifs were required for transcriptional repression upon TGF-β stimulation. Furthermore, Smads were found to interact with ATBF1 at both its N-terminal and C-terminal regions. Since the N-terminal (ATBF1N) and C-terminal regions of ATBF1 (ATBF1C) lack the ability of DNA binding, both truncated mutants rescued the cooperative inhibitory action by the TGF-β signaling and ATBF1 in a dose-dependent manner. Taken together, these findings indicate that TGF-β signaling can act in concert with ATBF1 to suppress the activity of the AFP promoter through direct interaction of ATBF1 with Smads.
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Li M, Fu X, Ma G, Sun X, Dong X, Nagy T, Xing C, Li J, Dong JT. Atbf1 regulates pubertal mammary gland development likely by inhibiting the pro-proliferative function of estrogen-ER signaling. PLoS One 2012; 7:e51283. [PMID: 23251482 PMCID: PMC3520988 DOI: 10.1371/journal.pone.0051283] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 10/31/2012] [Indexed: 11/18/2022] Open
Abstract
ATBF1 is a candidate tumor suppressor that interacts with estrogen receptor (ER) to inhibit the function of estrogen-ER signaling in gene regulation and cell proliferation control in human breast cancer cells. We therefore tested whether Atbf1 and its interaction with ER modulate the development of pubertal mammary gland, where estrogen is the predominant steroid hormone. In an in vitro model of cell differentiation, i.e., MCF10A cells cultured in Matrigel, ATBF1 expression was significantly increased, and knockdown of ATBF1 inhibited acinus formation. During mouse mammary gland development, Atbf1 was expressed at varying levels at different stages, with higher levels during puberty, lower during pregnancy, and the highest during lactation. Knockout of Atbf1 at the onset of puberty enhanced ductal elongation and bifurcation and promoted cell proliferation in both ducts and terminal end buds of pubertal mammary glands. Enhanced cell proliferation primarily occurred in ER-positive cells and was accompanied by increased expression of ER target genes. Furthermore, inactivation of Atbf1 reduced the expression of basal cell markers (CK5, CK14 and CD44) but not luminal cell markers. These findings indicate that Atbf1 plays a role in the development of pubertal mammary gland likely by modulating the function of estrogen-ER signaling in luminal cells and by modulating gene expression in basal cells.
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Affiliation(s)
- Mei Li
- Department of Genetics and Cell Biology, College of Life Sciences, Nankai University, Tianjin, China
- Department of Hematology and Medical Oncology, Emory Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Xiaoying Fu
- Department of Hematology and Medical Oncology, Emory Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Gui Ma
- Department of Genetics and Cell Biology, College of Life Sciences, Nankai University, Tianjin, China
| | - Xiaodong Sun
- Department of Hematology and Medical Oncology, Emory Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Xueyuan Dong
- Department of Hematology and Medical Oncology, Emory Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States of America
- * E-mail: (XD) (XD); (JTD) (JD)
| | - Tamas Nagy
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Changsheng Xing
- Department of Hematology and Medical Oncology, Emory Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Jie Li
- Department of Hematology and Medical Oncology, Emory Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Jin-Tang Dong
- Department of Genetics and Cell Biology, College of Life Sciences, Nankai University, Tianjin, China
- Department of Hematology and Medical Oncology, Emory Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States of America
- * E-mail: (XD) (XD); (JTD) (JD)
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Oestrogen causes ATBF1 protein degradation through the oestrogen-responsive E3 ubiquitin ligase EFP. Biochem J 2012; 444:581-90. [PMID: 22452784 DOI: 10.1042/bj20111890] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We reported previously that the tumour suppressor ATBF1 (AT motif-binding factor 1) formed an autoregulatory feedback loop with oestrogen-ERα (oestrogen receptor α) signalling to regulate oestrogen-dependent cell proliferation in breast cancer cells. In this loop ATBF1 inhibits the function of oestrogen-ERα signalling, whereas ATBF1 protein levels are fine-tuned by oestrogen-induced transcriptional up-regulation as well as UPP (ubiquitin-proteasome pathway)-mediated protein degradation. In the present study we show that EFP (oestrogen-responsive finger protein) is an E3 ubiquitin ligase mediating oestrogen-induced ATBF1 protein degradation. Knockdown of EFP increases ATBF1 protein levels, whereas overexpression of EFP decreases ATBF1 protein levels. EFP interacts with and ubiquitinates ATBF1 protein. Furthermore, we show that EFP is an important factor in oestrogen-induced ATBF1 protein degradation in which some other factors are also involved. In human primary breast tumours the levels of ATBF1 protein are positively correlated with the levels of EFP protein, as both are directly up-regulated ERα target gene products. However, the ratio of ATBF1 protein to EFP protein is negatively correlated with EFP protein levels. Functionally, ATBF1 antagonizes EFP-mediated cell proliferation. These findings not only establish EFP as the E3 ubiquitin ligase for oestrogen-induced ATBF1 protein degradation, but further support the autoregulatory feedback loop between ATBF1 and oestrogen-ERα signalling and thus implicate ATBF1 in oestrogen-dependent breast development and carcinogenesis.
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Jamshidi M, Bartkova J, Greco D, Tommiska J, Fagerholm R, Aittomäki K, Mattson J, Villman K, Vrtel R, Lukas J, Heikkilä P, Blomqvist C, Bartek J, Nevanlinna H. NQO1 expression correlates inversely with NFκB activation in human breast cancer. Breast Cancer Res Treat 2011; 132:955-68. [DOI: 10.1007/s10549-011-1629-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Accepted: 06/03/2011] [Indexed: 12/17/2022]
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13
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Dong XY, Guo P, Sun X, Li Q, Dong JT. Estrogen up-regulates ATBF1 transcription but causes its protein degradation in estrogen receptor-alpha-positive breast cancer cells. J Biol Chem 2011; 286:13879-90. [PMID: 21367855 DOI: 10.1074/jbc.m110.187849] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The proper level of estrogen-estrogen receptor (ER) signaling is important for the maintenance of epithelial homeostasis in the breast. In a previous study we demonstrated that ATBF1, which has been suggested as a tumor suppressor in breast cancer, inhibited estrogen-mediated cell proliferation by selectively competing with AIB1 for binding to the ER. However, the expression of ATBF1 mRNA was shown to positively correlate with ER in breast cancer specimens. We, therefore, examined whether estrogen regulates ATBF1. We demonstrated that estrogen up-regulated the transcription of ATBF1, which was mediated by the direct binding of the ER onto the ATBF1 promoter, and that a half-estrogen-responsive element in the ATBF1 promoter was essential for ER direct binding. Furthermore, we found that estrogen at lower levels increased, but at higher levels decreased the expression of ATBF1 protein, which involved the degradation of ATBF1 protein by the estrogen-responsive proteasome system. ATBF1 protein levels fluctuate with estrogen levels. Although lower levels of estrogen increased ATBF1 protein expression, ATBF1 still inhibited cell proliferation caused by lower levels of estrogen. These findings not only reveal an autoregulatory feedback loop between ATBF1 and estrogen-ER signaling but also suggest that ATBF1 plays a role in both the maintenance of breast epithelial homeostasis and breast tumorigenesis caused by elevated estrogen levels.
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Affiliation(s)
- Xue-Yuan Dong
- Department of Hematology and Medical Oncology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322, USA
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14
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Dong XY, Sun X, Guo P, Li Q, Sasahara M, Ishii Y, Dong JT. ATBF1 inhibits estrogen receptor (ER) function by selectively competing with AIB1 for binding to the ER in ER-positive breast cancer cells. J Biol Chem 2010; 285:32801-32809. [PMID: 20720010 DOI: 10.1074/jbc.m110.128330] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Loss of the q22 band of chromosome 16 is a frequent genetic event in breast cancer, and the candidate tumor suppressor gene, ATBF1, has been implicated in breast cancer by genomic deletion, transcriptional down-regulation, and association with better prognostic parameters. In addition, estrogen receptor (ER)-positive breast cancer expresses a higher level of ATBF1, suggesting a role of ATBF1 in ER-positive breast cancer. In this study, we examined whether and how ATBF1 affects the ER function in breast cancer cells. We found that ATBF1 inhibited ER-mediated gene transcription, cell growth, and proliferation in ER-positive breast cancer cells. In vitro and in vivo immunoprecipitation experiments revealed that ATBF1 interacted physically with the ER and that multiple domains in both ATBF1 and ER proteins mediated the interaction. Furthermore, we demonstrated that ATBF1 inhibited ER function by selectively competing with the steroid receptor coactivator AIB1 but not GRIP1 or SRC1 for binding to the ER. These findings not only support the concept that ATBF1 plays a tumor-suppressive role in breast cancer, they also provide a mechanism for how ATBF1 functions as a tumor suppressor in breast cancer.
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Affiliation(s)
- Xue-Yuan Dong
- From the Winship Cancer Institute and Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Xiaodong Sun
- From the Winship Cancer Institute and Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Peng Guo
- From the Winship Cancer Institute and Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Qunna Li
- From the Winship Cancer Institute and Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Masakiyo Sasahara
- Department of Pathology, Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, Toyama 930-0194, Japan
| | - Yoko Ishii
- Department of Pathology, Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, Toyama 930-0194, Japan
| | - Jin-Tang Dong
- From the Winship Cancer Institute and Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, Georgia 30322.
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15
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Jung AC, Briolat J, Millon R, de Reyniès A, Rickman D, Thomas E, Abecassis J, Clavel C, Wasylyk B. Biological and clinical relevance of transcriptionally active human papillomavirus (HPV) infection in oropharynx squamous cell carcinoma. Int J Cancer 2010; 126:1882-1894. [PMID: 19795456 DOI: 10.1002/ijc.24911] [Citation(s) in RCA: 169] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Human papillomaviruses (HPV) are associated with a subset of head and neck squamous cell carcinoma (HNSCC), particularly HPV16. This study analyzed the presence and genotype of high risk HPVs, viral DNA load and transcription of the E6/E7 mRNAs, in 231 consecutive HNSCC. Twelve out of 30 HPV16 DNA-positive tumors displayed high E6/E7 mRNAs levels and were localized in the oropharyngeal region. While HPV-free and non-transcriptionally active HPV-related patients showed similar 5-years survival rates, E6/E7 expression was associated with a better prognosis. This emphasizes the importance of considering the transcriptional status of HPV-positive tumors for patient stratification. A gene expression profiling analysis of these different types of tumors was carried out. The most significant differentially expressed gene was CDKN2A, a known biomarker for HPV-related cancer. Assessing both the expression level of the E6/E7 mRNAs and of CDKN2A in HNSCC is required to detect active HPV infection. Chromosomic alterations were investigated by Comparative Genomic Hybridation (CGH) analysis of tumors with transcriptionally active HPV and HPV-negative tumors. The loss of the chromosomal region 16q was found to be a major genetic event in HPV-positive lesions. A cluster of genes located in 16q21-24 displayed decreased expression levels, notably APP-BP1 that is involved in the modulation of the transcriptional activity of p53. In conclusion, this study highlights important criteria required to predict clinically active HPV infection, identifies new biological pathways implicated in HPV tumorigenesis and increases the understanding of HPV-HNSCC physiopathology that is required to develop new targets for therapy.
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Affiliation(s)
- Alain C Jung
- Centre Régional de Lutte Contre le Cancer Paul Strauss, Laboratoire de Biologie Tumorale, 3 Rue de la porte de l'Hôpital, Strasbourg Cedex, France
| | - Jenny Briolat
- INSERM UMRS 903, Laboratoire Pol Bouin, IFR 53, CHU Maison Blanche, 45 Rue Cognacq- Jay, Reims, France
| | - Régine Millon
- Centre Régional de Lutte Contre le Cancer Paul Strauss, Laboratoire de Biologie Tumorale, 3 Rue de la porte de l'Hôpital, Strasbourg Cedex, France
| | - Aurélien de Reyniès
- Programme Carte d'Identité des Tumeurs (CIT), Ligue Nationale Contre le Cancer, 14 Rue Corvisart, Paris, France
| | - David Rickman
- Programme Carte d'Identité des Tumeurs (CIT), Ligue Nationale Contre le Cancer, 14 Rue Corvisart, Paris, France
| | - Emilie Thomas
- Programme Carte d'Identité des Tumeurs (CIT), Ligue Nationale Contre le Cancer, 14 Rue Corvisart, Paris, France
| | - Joseph Abecassis
- Centre Régional de Lutte Contre le Cancer Paul Strauss, Laboratoire de Biologie Tumorale, 3 Rue de la porte de l'Hôpital, Strasbourg Cedex, France
| | - Christine Clavel
- INSERM UMRS 903, Laboratoire Pol Bouin, IFR 53, CHU Maison Blanche, 45 Rue Cognacq- Jay, Reims, France
| | - Bohdan Wasylyk
- IGBMC, UMR 7104 CNRS UDS-U 964 INSERM, 1 Rue Laurent Fries, Illkirch Graffenstaden, France
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Marjani H, Biramijamal F, Rakhshani N, Hossein-Nezhad A, Malekzadeh R. Investigation of NQO1 genetic polymorphism, NQO1 gene expression and PAH-DNA adducts in ESCC. A case-control study from Iran. GENETICS AND MOLECULAR RESEARCH 2010; 9:239-49. [DOI: 10.4238/vol9-1gmr693] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Geyer FC, Lopez-Garcia MA, Lambros MB, Reis-Filho JS. Genetic characterization of breast cancer and implications for clinical management. J Cell Mol Med 2009; 13:4090-103. [PMID: 19754664 PMCID: PMC4496116 DOI: 10.1111/j.1582-4934.2009.00906.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Breast cancer is a genetic disease caused by the accumulation of mutations in neoplastic cells. In the last few years, high-throughput microarray-based molecular analysis has provided increasingly more coherent information about the genetic aberrations in breast cancer. New biomarkers and molecular techniques are slowly becoming part of the diagnostic and prognostic armamentarium available for pathologists and oncologists to tailor the therapy for breast cancer patients. In this review, we will focus on the contribution of breast cancer somatic genetics to our understanding of breast cancer biology and its impact on breast cancer patient management.
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Affiliation(s)
- Felipe C Geyer
- Molecular Pathology Laboratory, The Breakthrough Breast Cancer Research Centre, Institute of Cancer Research, London, UK
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NAD(P)H:quinone oxidoreductase 1 Pro187Ser polymorphism and expression do not cosegregate with clinico-pathological characteristcs of human mammary tumors. Pharmacogenet Genomics 2009; 19:505-12. [DOI: 10.1097/fpc.0b013e32832cf9cf] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Kai K, Zhang Z, Yamashita H, Yamamoto Y, Miura Y, Iwase H. Loss of heterozygosity at the ATBF1-A locus located in the 16q22 minimal region in breast cancer. BMC Cancer 2008; 8:262. [PMID: 18796146 PMCID: PMC2564977 DOI: 10.1186/1471-2407-8-262] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2008] [Accepted: 09/16/2008] [Indexed: 01/07/2023] Open
Abstract
Background Loss of heterozygosity (LOH) on the long arm of chromosome 16 is one of the most frequent genetic events in solid tumors. Recently, the AT-motif binding factor 1 (ATBF1)-A gene, which has been assigned to chromosome 16q22.3-23.1, was identified as a plausible candidate for tumor suppression in solid tumors due to its functional inhibition of cell proliferation and high mutation rate in prostate cancer. We previously reported that a reduction in ATBF1-A mRNA levels correlated with a worse prognosis in breast cancer. However, the mechanisms regulating the reduction of ATBF1-A mRNA levels (such as mutation, methylation in the promoter region, or deletion spanning the coding region) have not been fully examined. In addition, few studies have analyzed LOH status at the ATBF1-A locus, located in the 16q22 minimal region. Methods Profiles of ATBF1-A mRNA levels that we previously reported for 127 cases were used. In this study, breast cancer specimens as well as autologous blood samples were screened for LOH using 6 polymorphic microsatellite markers spanning chromosome band 16q22. For mutational analysis, we selected 12 cases and analyzed selected spots in the ATBF1-A coding region at which mutations have been frequently reported in prostate cancer. Results Forty-three cases that yielded clear profiles of LOH status at both D16S3106 and D16S3018 microsatellites, nearest to the location of the ATBF1-A gene, were regarded as informative and were classified into two groups: LOH (22 cases) and retention of heterozygosity (21 cases). Comparative assessment of the ATBF1-A mRNA levels according to LOH status at the ATBF1-A locus demonstrated no relationship between them. In the 12 cases screened for mutational analysis, there were no somatic mutations with amino acid substitution or frameshift; however, two germ line alterations with possible polymorphisms were observed. Conclusion These findings imply that ATBF1-A mRNA levels are regulated at the transcriptional stage, but not by genetic mechanisms, deletions (LOH), or mutations.
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Affiliation(s)
- Kazuharu Kai
- Department of Breast and Endocrine Surgery, Faculty of Medical and Pharmaceutical Science, Kumamoto University, Kumamoto, Japan.
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