1
|
Suresh V, Bhattacharya B, Tshuva RY, Danan Gotthold M, Olender T, Bose M, Pradhan SJ, Zeev BB, Smith RS, Tole S, Galande S, Harwell CC, Baizabal JM, Reiner O. PRDM16 co-operates with LHX2 to shape the human brain. OXFORD OPEN NEUROSCIENCE 2024; 3:kvae001. [PMID: 38595939 PMCID: PMC10914218 DOI: 10.1093/oons/kvae001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 11/24/2023] [Accepted: 12/15/2023] [Indexed: 04/11/2024]
Abstract
PRDM16 is a dynamic transcriptional regulator of various stem cell niches, including adipocytic, hematopoietic, cardiac progenitors, and neural stem cells. PRDM16 has been suggested to contribute to 1p36 deletion syndrome, one of the most prevalent subtelomeric microdeletion syndromes. We report a patient with a de novo nonsense mutation in the PRDM16 coding sequence, accompanied by lissencephaly and microcephaly features. Human stem cells were genetically modified to mimic this mutation, generating cortical organoids that exhibited altered cell cycle dynamics. RNA sequencing of cortical organoids at day 32 unveiled changes in cell adhesion and WNT-signaling pathways. ChIP-seq of PRDM16 identified binding sites in postmortem human fetal cortex, indicating the conservation of PRDM16 binding to developmental genes in mice and humans, potentially at enhancer sites. A shared motif between PRDM16 and LHX2 was identified and further examined through comparison with LHX2 ChIP-seq data from mice. These results suggested a collaborative partnership between PRDM16 and LHX2 in regulating a common set of genes and pathways in cortical radial glia cells, possibly via their synergistic involvement in cortical development.
Collapse
Affiliation(s)
- Varun Suresh
- Department of Molecular Genetics, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
- Department of Biological Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India
| | - Bidisha Bhattacharya
- Department of Molecular Genetics, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
| | - Rami Yair Tshuva
- Department of Molecular Genetics, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
| | - Miri Danan Gotthold
- Department of Molecular Genetics, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
| | - Tsviya Olender
- Department of Molecular Genetics, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
| | - Mahima Bose
- Department of Biological Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India
| | - Saurabh J Pradhan
- Chromatin Biology and Epigenetics Laboratory, Biology Department, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pune 411008, India
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter, 3 Dr. Bohr-Gasse, 1030 Vienna, Austria
| | - Bruria Ben Zeev
- Edmond and Lily Safra Pediatric Hospital, Sheba Medical Center and Tel Aviv School of Medicine, Tel Aviv University, Ramat Aviv 69978, Israel
| | - Richard Scott Smith
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, 320 E. Superior St., Chicago, IL 60611, USA
| | - Shubha Tole
- Department of Biological Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India
| | - Sanjeev Galande
- Chromatin Biology and Epigenetics Laboratory, Biology Department, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pune 411008, India
- Department of Life Sciences, Center of Excellence in Epigenetics, Shiv Nadar University, Shiv Nadar IoE, Gautam Buddha Nagar, Uttar Pradesh - 201314, India
| | - Corey C Harwell
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, 35 Medical Center Way, San Francisco, CA 94143, USA
- Weill Institute for Neuroscience, 1651 4th St, San Francisco, CA94158, USA
- Department of Neurology, University of California, San Francisco, 505 Parnassus Ave, San Francisco, CA 94143, USA
| | - José-Manuel Baizabal
- Department of Biology, Indiana University, 1001 E 3rd St., Bloomington, IN 47405, USA
| | - Orly Reiner
- Department of Molecular Genetics, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
- Department of Molecular Neuroscience, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel
| |
Collapse
|
2
|
Li A, Li M, Wang J, Zhou J, Yang T, Fan M, Zhang K, Gao H, Ren H, Chen M. MECOM: a bioinformatics and experimentally identified marker for the diagnosis and prognosis of lung adenocarcinoma. Biomark Med 2024; 18:79-91. [PMID: 38440890 DOI: 10.2217/bmm-2023-0600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024] Open
Abstract
Objective: We aimed to explore the clinical value of MDS1 and EVI1 complex locus (MECOM) in lung adenocarcinoma (LUAD). Methods: Bioinformatics and experimental validation confirmed MECOM expression levels in LUAD. The value of MECOM was analyzed by receiver operating characteristic (ROC) curve and Cox regression analysis. Results: Serum MECOM levels were lower in LUAD and correlated with gender, TNM stage, tumor size, lymph node metastasis and distant metastasis. The ROC curve showed that the area under the curve of MECOM was 0.804 for LUAD and, of note, could reach 0.889 for advanced LUAD; specificity was up to 90%. Conclusion: MECOM may contribute to independently identifying LUAD patients, particularly in advanced stages.
Collapse
Affiliation(s)
- Anqi Li
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Meng Li
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Jing Wang
- Department of Pulmonary & Critical Care Medicine, Shaanxi Provincial Second People's Hospital, Xi'an, 710005, China
| | - Jiejun Zhou
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Tian Yang
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Meng Fan
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Kun Zhang
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Hengxing Gao
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Hui Ren
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Mingwei Chen
- Department of Respiratory & Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
- Department of Pulmonary & Critical Care Medicine, Shaanxi Provincial Second People's Hospital, Xi'an, 710005, China
| |
Collapse
|
3
|
Suresh V, Bhattacharya B, Tshuva RY, Danan Gotthold M, Olender T, Bose M, Pradhan SJ, Ben Zeev B, Smith RS, Tole S, Galande S, Harwell C, Baizabal JM, Reiner O. PRDM16 co-operates with LHX2 to shape the human brain. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.12.553065. [PMID: 37609127 PMCID: PMC10441425 DOI: 10.1101/2023.08.12.553065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
PRDM16 is a dynamic transcriptional regulator of various stem cell niches, including adipocytic, hematopoietic, cardiac progenitors, and neural stem cells. PRDM16 has been suggested to contribute to 1p36 deletion syndrome, one of the most prevalent subtelomeric microdeletion syndromes. We report a patient with a de novo nonsense mutation in the PRDM16 coding sequence, accompanied by lissencephaly and microcephaly features. Human stem cells were genetically modified to mimic this mutation, generating cortical organoids that exhibited altered cell cycle dynamics. RNA sequencing of cortical organoids at day 32 unveiled changes in cell adhesion and WNT-signaling pathways. ChIP-seq of PRDM16 identified binding sites in postmortem human fetal cortex, indicating the conservation of PRDM16 binding to developmental genes in mice and humans, potentially at enhancer sites. A shared motif between PRDM16 and LHX2 was identified and further examined through comparison with LHX2 ChIP-seq data from mice. These results suggested a collaborative partnership between PRDM16 and LHX2 in regulating a common set of genes and pathways in cortical radial glia cells, possibly via their synergistic involvement in cortical development.
Collapse
|
4
|
PRDM16, Negatively Regulated by miR-372-3p, Suppresses Cell Proliferation and Invasion in Prostate Cancer. Andrologia 2023. [DOI: 10.1155/2023/9821829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
Abstract
Prostate cancer (PCa) is one of the most prevalent malignant tumors. The alternation of microRNA (miRNA) expression is associated with prostate cancer progression, whereas its way to influence progression of prostate cancer remains elusive. The expression levels of PRDM16 mRNA and miR-372-3p in PCa cell lines were analyzed using qRT-PCR. The protein expression of PRDM16 in PCa cell lines was also analyzed using western blot. CCK-8, wound healing, and Transwell assays were applied to examine cell proliferation, migration, and invasion in prostate cancer cells, respectively. Dual-luciferase reporter assay was utilized to validate the interaction between miR-372-3p and PRDM16. In the present study, markedly decreased PRDM16 mRNA and protein expression levels were observed in prostate cancer cells. PRDM16 overexpression hampered cellular proliferation, migration, and invasion, while silencing PRDM16 had the opposite effect. Moreover, miR-372-3p could target the regulation expression of PRDM16. Rescue experiments demonstrated that upregulating miR-372-3p conspicuously restored the inhibitory effect of increased PRDM16 on cell proliferation, migration, and invasion in PCa. Overall, our study clarifies the biological role of miR-372-3p/PRDM16 axis in prostate cancer progression, which may be effective biomarkers for clinical treatment of prostate cancer.
Collapse
|
5
|
Zhang H, Guan Q, Wang R, Yang S, Yu X, Cui D, Su Z. Novel association of SNP rs2297828 in PRDM16 gene with predisposition to type 2 diabetes. Gene X 2023; 849:146916. [DOI: 10.1016/j.gene.2022.146916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/27/2022] [Accepted: 09/21/2022] [Indexed: 10/14/2022] Open
|
6
|
Ragab Ibrahim FA, Naser Hussein ZU, Yousef AI, Abd El Moneim NA, Hussein AM, Ahmed AFM, Ragab NM, Al-Masry O. Insights on possible interplay between epithelial-mesenchymal transition and T-type voltage gated calcium channels genes in metastatic breast carcinoma. Heliyon 2022; 8:e10160. [PMID: 36060991 PMCID: PMC9434037 DOI: 10.1016/j.heliyon.2022.e10160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 05/22/2022] [Accepted: 07/27/2022] [Indexed: 12/24/2022] Open
Abstract
Breast cancer (BC) is the most common life-threatening malignancy amongst women with high incidence worldwide. In Egypt, it is the most known malignancy amongst females. Epithelial-mesenchymal transition (EMT) participates in breast tumors’ invasiveness, and metastasis, but the process is poorly understood. The involvement of voltage-gated calcium channels signaling in EMT has not yet been fully explored. Therefore, the aim of this study was to investigate the possible role of T-type calcium channels in metastasis and EMT among breast cancer patients. The study was carried out on 48 female breast cancer patients who were divided into two groups; metastatic and non-metastatic. qRT-PCR was employed to measure the expression of EMT marker genes (N- cadherin, E-cadherin, Snail, Vimentin and T-type VGCCs genes (CACNA1G, CACNA1H, and CACNA1I). The results of the present study revealed differential expression of the EMT marker genes in blood and tissue of non-metastatic and metastatic breast cancer patients, with a clear tendency for the mesenchymal markers to be significantly elevated in metastatic patients as well as malignant tissues taken from non-metastatic patients as compared to their paired tumor adjacent normal (TAN) tissue. Both CACNA1H and CACNA1I (T-type VGCCs oncogenes) were significantly elevated in blood of metastatic patients when compared to non-metastatic ones. In contrast, CACNA1G (tumor suppressor) exhibited a significant decrease in metastatic patients. The strong correlation between the expression of T-type VGCCs and mesenchymal marker genes in metastatic breast cancer patients casts light on the role of T-type VGCCs in metastasis and their involved in tumor invasiveness.
Collapse
|
7
|
Yin G, Yan C, Hao J, Zhang C, Wang P, Zhao C, Cai S, Meng B, Zhang A, Li L. PRDM16, negatively regulated by miR-372-3p, suppresses cell proliferation and invasion in prostate cancer. Andrologia 2022:e14529. [PMID: 35858224 DOI: 10.1111/and.14529] [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: 03/03/2022] [Revised: 05/27/2022] [Accepted: 06/26/2022] [Indexed: 11/26/2022] Open
Abstract
Prostate cancer (PCa) is one of the most prevalent malignant tumours. The alternation of microRNAs (miRNAs) expression is associated with prostate cancer progression, whereas its way to influence progression of prostate cancer remains elusive. The expression levels of PRDM16 mRNA and miR-372-3p in PCa cell lines were analysed using qRT-PCR. The protein expression of PRDM16 in PCa cell lines was also analysed using Western blot. CCK-8, wound healing and Transwell assays were applied to examine cell proliferation, migration, and invasion in prostate cancer cells, respectively. Dual-luciferase reporter assay was utilised to validate the interaction between miR-372-3p and PRDM16. In the present study, markedly decreased PRDM16 mRNA and protein expression levels were observed in prostate cancer cells. PRDM16 overexpression hampered cellular proliferation, migration, and invasion, while silencing PRDM16 had the opposite effect. Moreover, miR-372-3p could target the regulation expression of PRDM16. Rescue experiments demonstrated that upregulating miR-372-3p conspicuously restored the inhibitory effect of increased PRDM16 on cell proliferation, migration, and invasion in PCa. Overall, our study clarifies the biological role of miR-372-3p/PRDM16 axis in prostate cancer progression, which may be effective biomarkers for clinical treatment of prostate cancer.
Collapse
Affiliation(s)
- Guangwei Yin
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Chengquan Yan
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Jing Hao
- Office of Academic Affairs, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Chunying Zhang
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Pengfei Wang
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Chaofei Zhao
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Shengyong Cai
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Bin Meng
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Aili Zhang
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| | - Lin Li
- The Third Department of Urology, Tangshan Gongren Hospital, Tangshan, Hebei Province, China
| |
Collapse
|
8
|
Li M, Ren H, Zhang Y, Liu N, Fan M, Wang K, Yang T, Chen M, Shi P. MECOM/PRDM3 and PRDM16 Serve as Prognostic-Related Biomarkers and Are Correlated With Immune Cell Infiltration in Lung Adenocarcinoma. Front Oncol 2022; 12:772686. [PMID: 35174083 PMCID: PMC8841357 DOI: 10.3389/fonc.2022.772686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 01/03/2022] [Indexed: 12/24/2022] Open
Abstract
Background The MDS1 and EVI1 complex locus (MECOM, also called PRDM3) and PR domain containing 16 (PRDM16) are two highly related zinc finger transcription factors associated with many malignancies. However, the mechanisms of MECOM and PRDM16 in prognosis and tumor immune infiltration in lung adenocarcinoma (LUAD) remain uncertain. Methods The Cancer Genome Atlas (TCGA), Oncomine, UALCAN, GEPIA, and TIMER databases were searched to determine the relationship between the expression of MECOM and PRDM16, clinicopathological features, immune infiltration, and prognosis in LUAD. Coexpressed genes of the two genes were investigated by CBioPortal, and the potential mechanism of MECOM- and PRDM16-related genes was elucidated by GO and KEGG analyses. STRING database was utilized to further construct the protein-protein interaction network of the coexpressed genes, and the hub genes were identified by Cytoscape. Finally, qRT-PCR was performed to identify the mRNA levels of the target genes in LUAD. Results mRNA levels of MECOM and PRDM16 were downregulated in LUAD (p < 0.05), and the low expression of the two genes was associated with the age, gender, smoking duration, tissue subtype, poor stage, nodal metastasis status, TP53 mutation, and prognosis in LUAD (p < 0.05). MECOM and PRDM16 were also found to be correlated with the expression of a variety of immune cell subsets and their markers. KEGG analysis showed that both of them were mainly enriched in the cell cycle, cellular senescence, DNA replication, and p53 signaling pathway. Importantly, the mRNA levels of the two genes were also found to be decreased in the clinical samples of LUAD by qRT-PCR. Conclusion MECOM and PRDM16 may serve as potential prognostic biomarkers which govern immune cell recruitment to LUAD.
Collapse
Affiliation(s)
- Meng Li
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- Department of Talent Highland, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Hui Ren
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- Department of Talent Highland, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Yanpeng Zhang
- Department of Talent Highland, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- Department of Thoracic Surgery, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- Department of Center for Translational Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Na Liu
- Department of Medical Oncology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Meng Fan
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Ke Wang
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Tian Yang
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Mingwei Chen
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Puyu Shi, ; ; Mingwei Chen, ;
| | - Puyu Shi
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Puyu Shi, ; ; Mingwei Chen, ;
| |
Collapse
|
9
|
Pietropaolo V, Prezioso C, Moens U. Role of Virus-Induced Host Cell Epigenetic Changes in Cancer. Int J Mol Sci 2021; 22:ijms22158346. [PMID: 34361112 PMCID: PMC8346956 DOI: 10.3390/ijms22158346] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 07/30/2021] [Accepted: 08/02/2021] [Indexed: 12/12/2022] Open
Abstract
The tumor viruses human T-lymphotropic virus 1 (HTLV-1), hepatitis C virus (HCV), Merkel cell polyomavirus (MCPyV), high-risk human papillomaviruses (HR-HPVs), Epstein-Barr virus (EBV), Kaposi’s sarcoma-associated herpes virus (KSHV) and hepatitis B virus (HBV) account for approximately 15% of all human cancers. Although the oncoproteins of these tumor viruses display no sequence similarity to one another, they use the same mechanisms to convey cancer hallmarks on the infected cell. Perturbed gene expression is one of the underlying mechanisms to induce cancer hallmarks. Epigenetic processes, including DNA methylation, histone modification and chromatin remodeling, microRNA, long noncoding RNA, and circular RNA affect gene expression without introducing changes in the DNA sequence. Increasing evidence demonstrates that oncoviruses cause epigenetic modifications, which play a pivotal role in carcinogenesis. In this review, recent advances in the role of host cell epigenetic changes in virus-induced cancers are summarized.
Collapse
Affiliation(s)
- Valeria Pietropaolo
- Department of Public Health and Infectious Diseases, “Sapienza” University, 00185 Rome, Italy;
- Correspondence: (V.P.); (U.M.)
| | - Carla Prezioso
- Department of Public Health and Infectious Diseases, “Sapienza” University, 00185 Rome, Italy;
- IRCSS San Raffaele Roma, Microbiology of Chronic Neuro-Degenerative Pathologies, 00161 Rome, Italy
| | - Ugo Moens
- Molecular Inflammation Research Group, Department of Medical Biology, Faculty of Health Sciences, University of Tromsø—The Arctic University of Norway, 9037 Tromsø, Norway
- Correspondence: (V.P.); (U.M.)
| |
Collapse
|
10
|
Xu W, Li C, Ma B, Lu Z, Wang Y, Jiang H, Luo Y, Yang Y, Wang X, Liao T, Ji Q, Wang Y, Wei W. Identification of Key Functional Gene Signatures Indicative of Dedifferentiation in Papillary Thyroid Cancer. Front Oncol 2021; 11:641851. [PMID: 33996555 PMCID: PMC8113627 DOI: 10.3389/fonc.2021.641851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 02/19/2021] [Indexed: 12/29/2022] Open
Abstract
Background: Differentiated thyroid cancer (DTC) is the most common type of thyroid cancer. Many of them can relapse to dedifferentiated thyroid cancer (DDTC) and exhibit different gene expression profiles. The underlying mechanism of dedifferentiation and the involved genes or pathways remained to be investigated. Methods: A discovery cohort obtained from patients who received surgical resection in the Fudan University Shanghai Cancer Center (FUSCC) and two validation cohorts derived from Gene Expression Omnibus (GEO) database were used to screen out differentially expressed genes in the dedifferentiation process. Weighted gene co-expression network analysis (WGCNA) was constructed to identify modules highly related to differentiation. Gene Set Enrichment Analysis (GSEA) was used to identify pathways related to differentiation, and all differentially expressed genes were grouped by function based on the GSEA and literature reviewing data. Least absolute shrinkage and selection operator (LASSO) regression analysis was used to control the number of variables in each group. Next, we used logistic regression to build a gene signature in each group to indicate differentiation status, and we computed receiver operating characteristic (ROC) curve to evaluate the indicative performance of each signature. Results: A total of 307 upregulated and 313 downregulated genes in poorly differentiated thyroid cancer (PDTC) compared with papillary thyroid cancer (PTC) and normal thyroid (NT) were screened out in FUSCC cohort and validated in two GEO cohorts. WGCNA of 620 differential genes yielded the seven core genes with the highest correlation with thyroid differentiation score (TDS). Furthermore, 395 genes significantly correlated with TDS in univariate logistic regression analysis were divided into 11 groups. The areas under the ROC curve (AUCs) of the gene signature of group transcription and epigenetic modification, signal and substance transport, extracellular matrix (ECM), and metabolism in the training set [The Cancer Genome Atlas (TCGA) cohort] and validation set (combined GEO cohort) were both >0.75. The gene signature based on group transcription and epigenetic modification, cilia formation and movement, and proliferation can reflect the patient's disease recurrence state. Conclusion: The dedifferentiation of DTC is affected by a variety of mechanisms including many genes. The gene signature of group transcription and epigenetic modification, signal and substance transport, ECM, and metabolism can be used as biomarkers for DDTC.
Collapse
Affiliation(s)
- Weibo Xu
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Cuiwei Li
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ben Ma
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhongwu Lu
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yuchen Wang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Hongyi Jiang
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yi Luo
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yichen Yang
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiao Wang
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Tian Liao
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Qinghai Ji
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yu Wang
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wenjun Wei
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| |
Collapse
|
11
|
Targeting aberrant DNA hypermethylation as a driver of ATL leukemogenesis by using the new oral demethylating agent OR-2100. Blood 2021; 136:871-884. [PMID: 32391874 DOI: 10.1182/blood.2019003084] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 04/10/2020] [Indexed: 12/15/2022] Open
Abstract
Adult T-cell leukemia-lymphoma (ATL) is an aggressive hematological malignancy of CD4+ T cells transformed by human T-cell lymphotropic virus-1 (HTLV-1). Most HTLV-1-infected individuals are asymptomatic, and only 3% to 5% of carriers develop ATL. Here, we describe the contribution of aberrant DNA methylation to ATL leukemogenesis. HTLV-1-infected T-cells and their uninfected counterparts were separately isolated based on CADM1 and CD7 expression status, and differentially methylated positions (DMPs) specific to HTLV-infected T cells were identified through genome-wide DNA methylation profiling. Accumulation of DNA methylation at hypermethylated DMPs correlated strongly with ATL development and progression. In addition, we identified 22 genes downregulated because of promoter hypermethylation in HTLV-1-infected T cells, including THEMIS, LAIR1, and RNF130, which negatively regulate T-cell receptor (TCR) signaling. Phosphorylation of ZAP-70, a transducer of TCR signaling, was dysregulated in HTLV-1-infected cell lines but was normalized by reexpression of THEMIS. Therefore, we hypothesized that DNA hypermethylation contributes to growth advantages in HTLV-1-infected cells during ATL leukemogenesis. To test this idea, we investigated the anti-ATL activities of OR-1200 and OR-2100 (OR21), novel decitabine (DAC) prodrugs with enhanced oral bioavailability. Both DAC and OR21 inhibited cell growth, accompanied by global DNA hypomethylation, in xenograft tumors established by implantation of HTLV-1-infected cells. OR21 was less hematotoxic than DAC, whereas tumor growth inhibition was almost identical between the 2 compounds, making it suitable for long-term treatment of ATL patient-derived xenograft mice. Our results demonstrate that regional DNA hypermethylation is functionally important for ATL leukemogenesis and an effective therapeutic target.
Collapse
|
12
|
Leszczyński P, Śmiech M, Salam Teeli A, Haque E, Viger R, Ogawa H, Pierzchała M, Taniguchi H. Deletion of the Prdm3 Gene Causes a Neuronal Differentiation Deficiency in P19 Cells. Int J Mol Sci 2020; 21:ijms21197192. [PMID: 33003409 PMCID: PMC7582457 DOI: 10.3390/ijms21197192] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/16/2020] [Accepted: 09/22/2020] [Indexed: 12/29/2022] Open
Abstract
PRDM (PRDI-BF1 (positive regulatory domain I-binding factor 1) and RIZ1 (retinoblastoma protein-interacting zinc finger gene 1) homologous domain-containing) transcription factors are a group of proteins that have a significant impact on organ development. In our study, we assessed the role of Prdm3 in neurogenesis and the mechanisms regulating its expression. We found that Prdm3 mRNA expression was induced during neurogenesis and that Prdm3 gene knockout caused premature neuronal differentiation of the P19 cells and enhanced the growth of non-neuronal cells. Interestingly, we found that Gata6 expression was also significantly upregulated during neurogenesis. We further studied the regulatory mechanism of Prdm3 expression. To determine the role of GATA6 in the regulation of Prdm3 mRNA expression, we used a luciferase-based reporter assay and found that Gata6 overexpression significantly increased the activity of the Prdm3 promoter. Finally, the combination of retinoic acid receptors α and β, along with Gata6 overexpression, further increased the activity of the luciferase reporter. Taken together, our results suggest that in the P19 cells, PRDM3 contributed to neurogenesis and its expression was stimulated by the synergism between GATA6 and the retinoic acid signaling pathway.
Collapse
Affiliation(s)
- Paweł Leszczyński
- Institute of Genetics and Animal Biotechnology, Laboratory for Genome Editing and Transcriptional Regulation, Polish Academy of Sciences, 05-552 Jastrzębiec, Poland; (P.L.); (M.Ś.); (A.S.T.); (E.H.)
| | - Magdalena Śmiech
- Institute of Genetics and Animal Biotechnology, Laboratory for Genome Editing and Transcriptional Regulation, Polish Academy of Sciences, 05-552 Jastrzębiec, Poland; (P.L.); (M.Ś.); (A.S.T.); (E.H.)
| | - Aamir Salam Teeli
- Institute of Genetics and Animal Biotechnology, Laboratory for Genome Editing and Transcriptional Regulation, Polish Academy of Sciences, 05-552 Jastrzębiec, Poland; (P.L.); (M.Ś.); (A.S.T.); (E.H.)
| | - Effi Haque
- Institute of Genetics and Animal Biotechnology, Laboratory for Genome Editing and Transcriptional Regulation, Polish Academy of Sciences, 05-552 Jastrzębiec, Poland; (P.L.); (M.Ś.); (A.S.T.); (E.H.)
| | - Robert Viger
- Reproduction, Mother and Child Health, Centre de Recherche du CHU de Québec-Université Laval and Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle (CRDSI), Quebec, QC GIV4G2, Canada;
- Department of Obstetrics, Gynecology, and Reproduction, Université Laval, Quebec, QC G1V0A6, Canada
| | - Hidesato Ogawa
- Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita 565-0871, Japan;
| | - Mariusz Pierzchała
- Institute of Genetics and Animal Biotechnology, Department of Genomics and Biodiversity, Polish Academy of Sciences, 05-552 Jastrzębiec, Poland;
| | - Hiroaki Taniguchi
- Institute of Genetics and Animal Biotechnology, Laboratory for Genome Editing and Transcriptional Regulation, Polish Academy of Sciences, 05-552 Jastrzębiec, Poland; (P.L.); (M.Ś.); (A.S.T.); (E.H.)
- Correspondence: ; Tel.: +48-22-736-70-95
| |
Collapse
|
13
|
Dao FT, Chen WM, Long LY, Li LD, Yang L, Wang J, Liu YR, Jiang H, Zhang XH, Jiang Q, Qin YZ. High PRDM16 expression predicts poor outcomes in adult acute myeloid leukemia patients with intermediate cytogenetic risk: a comprehensive cohort study from a single Chinese center. Leuk Lymphoma 2020; 62:185-193. [PMID: 32902355 DOI: 10.1080/10428194.2020.1817436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Acute myeloid leukemia with intermediate cytogenetic risk (ICR-AML) needs to be stratified and abnormal gene expression might be prognostic. PR/SET domain 16 (PRDM16) transcript levels were assessed in 267 consecutive adult ICR-AML patients at diagnosis by real-time quantitative PCR. 38.2% patients had PRDM16 transcript levels higher than the upper limit of normal bone marrow samples. Through ROC curve analysis and comparison of relapse-free survival (RFS), the optimal cutoff value of PRDM16 transcript levels was identified to group patients into high expression (PRDM16-H, 21.3%) and low expression (PRDM16-L). PRDM16-H was significantly associated with lower 4-year RFS and overall survival (OS) rates in the entire cohort, patients with normal karyotypes, FLT3-ITD (-) and NPM1 mutation (+)/FLT3-ITD (-) patients (all p < .05). Multivariate analysis showed that PRDM16-H was an independent adverse prognostic factor for RFS and OS in the entire cohort. Therefore, high PRDM16 expression at diagnosis predicts poor outcomes in adult ICR-AML patients.
Collapse
Affiliation(s)
- Feng-Ting Dao
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Wen-Min Chen
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Ling-Yu Long
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Ling-Di Li
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Lu Yang
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Jun Wang
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Yan-Rong Liu
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Hao Jiang
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Xiao-Hui Zhang
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Qian Jiang
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Ya-Zhen Qin
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| |
Collapse
|
14
|
Casamassimi A, Rienzo M, Di Zazzo E, Sorrentino A, Fiore D, Proto MC, Moncharmont B, Gazzerro P, Bifulco M, Abbondanza C. Multifaceted Role of PRDM Proteins in Human Cancer. Int J Mol Sci 2020; 21:ijms21072648. [PMID: 32290321 PMCID: PMC7177584 DOI: 10.3390/ijms21072648] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/29/2020] [Accepted: 04/08/2020] [Indexed: 12/15/2022] Open
Abstract
The PR/SET domain family (PRDM) comprise a family of genes whose protein products share a conserved N-terminal PR [PRDI-BF1 (positive regulatory domain I-binding factor 1) and RIZ1 (retinoblastoma protein-interacting zinc finger gene 1)] homologous domain structurally and functionally similar to the catalytic SET [Su(var)3-9, enhancer-of-zeste and trithorax] domain of histone methyltransferases (HMTs). These genes are involved in epigenetic regulation of gene expression through their intrinsic HMTase activity or via interactions with other chromatin modifying enzymes. In this way they control a broad spectrum of biological processes, including proliferation and differentiation control, cell cycle progression, and maintenance of immune cell homeostasis. In cancer, tumor-specific dysfunctions of PRDM genes alter their expression by genetic and/or epigenetic modifications. A common characteristic of most PRDM genes is to encode for two main molecular variants with or without the PR domain. They are generated by either alternative splicing or alternative use of different promoters and play opposite roles, particularly in cancer where their imbalance can be often observed. In this scenario, PRDM proteins are involved in cancer onset, invasion, and metastasis and their altered expression is related to poor prognosis and clinical outcome. These functions strongly suggest their potential use in cancer management as diagnostic or prognostic tools and as new targets of therapeutic intervention.
Collapse
Affiliation(s)
- Amelia Casamassimi
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio, 80138 Naples, Italy; (E.D.Z.); (A.S.)
- Correspondence: (A.C.); (C.A.); Tel.: +39-081-566-7579 (A.C.); +39-081-566-7568 (C.A.)
| | - Monica Rienzo
- Department of Environmental, Biological, and Pharmaceutical Sciences and Technologies, University of Campania “Luigi Vanvitelli”, 81100 Caserta, Italy;
| | - Erika Di Zazzo
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio, 80138 Naples, Italy; (E.D.Z.); (A.S.)
- Department of Medicine and Health Sciences “V. Tiberio”, University of Molise, 86100 Campobasso, Italy;
| | - Anna Sorrentino
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio, 80138 Naples, Italy; (E.D.Z.); (A.S.)
| | - Donatella Fiore
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.F.); (M.C.P.); (P.G.)
| | - Maria Chiara Proto
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.F.); (M.C.P.); (P.G.)
| | - Bruno Moncharmont
- Department of Medicine and Health Sciences “V. Tiberio”, University of Molise, 86100 Campobasso, Italy;
| | - Patrizia Gazzerro
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy; (D.F.); (M.C.P.); (P.G.)
| | - Maurizio Bifulco
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples “Federico II”, 80131 Naples, Italy;
| | - Ciro Abbondanza
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio, 80138 Naples, Italy; (E.D.Z.); (A.S.)
- Correspondence: (A.C.); (C.A.); Tel.: +39-081-566-7579 (A.C.); +39-081-566-7568 (C.A.)
| |
Collapse
|
15
|
Ivanochko D, Halabelian L, Henderson E, Savitsky P, Jain H, Marcon E, Duan S, Hutchinson A, Seitova A, Barsyte-Lovejoy D, Filippakopoulos P, Greenblatt J, Lima-Fernandes E, Arrowsmith CH. Direct interaction between the PRDM3 and PRDM16 tumor suppressors and the NuRD chromatin remodeling complex. Nucleic Acids Res 2019; 47:1225-1238. [PMID: 30462309 PMCID: PMC6379669 DOI: 10.1093/nar/gky1192] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/31/2018] [Accepted: 11/15/2018] [Indexed: 01/01/2023] Open
Abstract
Aberrant isoform expression of chromatin-associated proteins can induce epigenetic programs related to disease. The MDS1 and EVI1 complex locus (MECOM) encodes PRDM3, a protein with an N-terminal PR-SET domain, as well as a shorter isoform, EVI1, lacking the N-terminus containing the PR-SET domain (ΔPR). Imbalanced expression of MECOM isoforms is observed in multiple malignancies, implicating EVI1 as an oncogene, while PRDM3 has been suggested to function as a tumor suppressor through an unknown mechanism. To elucidate functional characteristics of these N-terminal residues, we compared the protein interactomes of the full-length and ΔPR isoforms of PRDM3 and its closely related paralog, PRDM16. Unlike the ΔPR isoforms, both full-length isoforms exhibited a significantly enriched association with components of the NuRD chromatin remodeling complex, especially RBBP4. Typically, RBBP4 facilitates chromatin association of the NuRD complex by binding to histone H3 tails. We show that RBBP4 binds to the N-terminal amino acid residues of PRDM3 and PRDM16, with a dissociation constant of 3.0 μM, as measured by isothermal titration calorimetry. Furthermore, high-resolution X-ray crystal structures of PRDM3 and PRDM16 N-terminal peptides in complex with RBBP4 revealed binding to RBBP4 within the conserved histone H3-binding groove. These data support a mechanism of isoform-specific interaction of PRDM3 and PRDM16 with the NuRD chromatin remodeling complex.
Collapse
Affiliation(s)
- Danton Ivanochko
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G 1L7, Canada.,Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G 2M9, Canada.,Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G 1L7, Canada
| | - Levon Halabelian
- Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G 1L7, Canada
| | - Elizabeth Henderson
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, OX3 7DQ, United Kingdom
| | - Pavel Savitsky
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, OX3 7DQ, United Kingdom
| | - Harshika Jain
- Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G 1L7, Canada
| | - Edyta Marcon
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A8, Canada.,Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON, M5S 3E1, Canada
| | - Shili Duan
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G 2M9, Canada
| | - Ashley Hutchinson
- Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G 1L7, Canada
| | - Alma Seitova
- Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G 1L7, Canada
| | | | - Panagis Filippakopoulos
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, OX3 7DQ, United Kingdom
| | - Jack Greenblatt
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A8, Canada.,Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON, M5S 3E1, Canada
| | - Evelyne Lima-Fernandes
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G 1L7, Canada.,Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G 2M9, Canada.,Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G 1L7, Canada
| | - Cheryl H Arrowsmith
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G 1L7, Canada.,Princess Margaret Cancer Centre, University Health Network, Toronto, ON, M5G 2M9, Canada.,Structural Genomics Consortium, University of Toronto, Toronto, ON, M5G 1L7, Canada
| |
Collapse
|
16
|
PRDM16 functions as a suppressor of lung adenocarcinoma metastasis. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:35. [PMID: 30683132 PMCID: PMC6347838 DOI: 10.1186/s13046-019-1042-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 01/15/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND The transcription factor PR domain containing 16 (PRDM16) is known to play a significant role in the determination and function of brown and beige fat. However, the role of PRDM16 in tumor biology has not been well addressed. Here we investigated the impact of PRDM16 on tumor growth and metastasis in lung cancer. METHODS UALCAN database, immunoblotting and immunohistochemistry analysis were used to assess PRDM16 expression in lung cancer patients. Kaplan-Meier plotter database was used to analyze the overall survival of patients with lung cancer stratified by PRDM16 expression. PRDM16 overexpression and knockdown experiments were conducted to assess the effects of PRDM16 on growth and metastasis in vitro and in vivo, and its molecular mechanism was investigated in lung adenocarcinoma cells by chromatin immunoprecipitation-sequencing (ChIP-Seq), real time-quantitative PCR (RT-qPCR), luciferase assay, xenograft models and rescue experiments. RESULTS PRDM16 was downregulated in lung adenocarcinomas, and its expression level correlated with key pathological characteristics and prognoses of lung adenocarcinoma patients. Overexpressing PRDM16 inhibited the epithelial-to-mesenchymal transition (EMT) of cancer cells both in vivo and in vitro by repressing the transcription of Mucin-4 (MUC4), one of the regulators of EMT in lung adenocarcinomas. Furthermore, deleting the PR domain from PRDM16 increased the transcriptional repression of MUC4 by exhibiting significant differences in histone modifications on its promoter. CONCLUSIONS Our findings demonstrate a critical interplay between transcriptional and epigenetic modifications during lung adenocarcinoma progression involving EMT of cancer cells and suggest that PRDM16 is a metastasis suppressor and potential therapeutic target for lung adenocarcinomas.
Collapse
|
17
|
Functional relevance of genes predicted to be affected by epigenetic alterations in atypical teratoid/rhabdoid tumors. J Neurooncol 2018; 141:43-55. [DOI: 10.1007/s11060-018-03018-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 09/28/2018] [Indexed: 02/01/2023]
|
18
|
T-Type voltage gated calcium channels: a target in breast cancer? Breast Cancer Res Treat 2018; 173:11-21. [PMID: 30242580 DOI: 10.1007/s10549-018-4970-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 09/15/2018] [Indexed: 12/14/2022]
Abstract
PURPOSE The purpose of this review article is to discuss the potential of T-type voltage gated calcium channels (VGCCs) as drug targets in breast cancer. Breast cancer, attributable to the different molecular subtypes, has a crucial need for therapeutic strategies to counter the mortality rate. VGCCs play an important role in regulating cytosolic free calcium levels which regulate cellular processes like tumorigenesis and cancer progression. In the last decade, T-type VGCCs have been investigated in breast cancer proliferation. Calcium channel blockers, in general, have shown an anti-proliferative and cytotoxic effects. T-type VGCC antagonists have shown growth inhibition owing to the inhibition of CaV3.2 isoform. CaV3.1 isoform has been indicated as a tumour-suppressor gene candidate and is reported to support anti-proliferative and apoptotic activity in breast cancer. The distribution of T-type VGCC isoforms in different breast cancer molecular subtypes is diverse and needs to be further investigated. The role of T-type VGCCs in breast cancer migration, metastasis and more importantly in epithelial to mesenchymal transition (EMT) is yet to be elucidated. In addition, interlaced therapy, using a combination of chemotherapy drugs and T-type VGCC blockers, presents a promising therapeutic approach for breast cancer but more validation and clinical trials are needed. Also, for investigating the potential of T-type VGCC blocker therapy, there is a need for isoform-specific agonists/antagonists to define and discover roles of T-type VGCC specific isoforms. CONCLUSION Our article provides a review of the role of T-type VGCCs in breast cancer and also discusses future of the research in this area so that it can be ascertained whether there is any potential of T-type VGCCs as drug targets in breast cancer.
Collapse
|
19
|
Yamagishi M, Fujikawa D, Watanabe T, Uchimaru K. HTLV-1-Mediated Epigenetic Pathway to Adult T-Cell Leukemia-Lymphoma. Front Microbiol 2018; 9:1686. [PMID: 30087673 PMCID: PMC6066519 DOI: 10.3389/fmicb.2018.01686] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 07/06/2018] [Indexed: 11/13/2022] Open
Abstract
Human T-cell leukemia virus type 1 (HTLV-1), the first reported human oncogenic retrovirus, is the etiologic agent of highly aggressive, currently incurable diseases such as adult T-cell leukemia-lymphoma (ATL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). HTLV-1 proteins, including Tax and HBZ, have been shown to have critical roles in HTLV-1 pathogenicity, yet the underlying mechanisms of HTLV-1-driven leukemogenesis are unclear. The frequent disruption of genetic and epigenetic gene regulation in various types of malignancy, including ATL, is evident. In this review, we illustrate a focused range of topics about the establishment of HTLV-1 memory: (1) genetic lesion in the Tax interactome pathway, (2) gene regulatory loop/switch, (3) disordered chromatin regulation, (4) epigenetic lock by the modulation of epigenetic factors, (5) the loss of gene fine-tuner microRNA, and (6) the alteration of chromatin regulation by HTLV-1 integration. We discuss the persistent influence of Tax-dependent epigenetic changes even after the disappearance of HTLV-1 gene expression due to the viral escape from the immune system, which is a remaining challenge in HTLV-1 research. The summarized evidence and conceptualized description may provide a better understanding of HTLV-1-mediated cellular transformation and the potential therapeutic strategies to combat HTLV-1-associated diseases.
Collapse
Affiliation(s)
- Makoto Yamagishi
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo, Japan
| | - Dai Fujikawa
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo, Japan
| | - Toshiki Watanabe
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kaoru Uchimaru
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo, Japan
| |
Collapse
|
20
|
Corrigan DJ, Luchsinger LL, Justino de Almeida M, Williams LJ, Strikoudis A, Snoeck HW. PRDM16 isoforms differentially regulate normal and leukemic hematopoiesis and inflammatory gene signature. J Clin Invest 2018; 128:3250-3264. [PMID: 29878897 DOI: 10.1172/jci99862] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 05/31/2018] [Indexed: 12/13/2022] Open
Abstract
PRDM16 is a transcriptional coregulator involved in translocations in acute myeloblastic leukemia (AML), myelodysplastic syndromes, and T acute lymphoblastic leukemia that is highly expressed in and required for the maintenance of hematopoietic stem cells (HSCs), and can be aberrantly expressed in AML. Prdm16 is expressed as full-length (fPrdm16) and short (sPrdm16) isoforms, the latter lacking the N-terminal PR domain. The role of both isoforms in normal and malignant hematopoiesis is unclear. We show here that fPrdm16 was critical for HSC maintenance, induced multiple genes involved in GTPase signaling, and repressed inflammation, while sPrdm16 supported B cell development biased toward marginal zone B cells and induced an inflammatory signature. In a mouse model of human MLL-AF9 leukemia, fPrdm16 extended latency, while sPrdm16 shortened latency and induced a strong inflammatory signature, including several cytokines and chemokines that are associated with myelodysplasia and with a worse prognosis in human AML. Finally, in human NPM1-mutant and in MLL-translocated AML, high expression of PRDM16, which negatively impacts outcome, was associated with inflammatory gene expression, thus corroborating the mouse data. Our observations demonstrate distinct roles for Prdm16 isoforms in normal HSCs and AML, and identify sPrdm16 as one of the drivers of prognostically adverse inflammation in leukemia.
Collapse
Affiliation(s)
- David J Corrigan
- Columbia Center of Human Development.,Department of Microbiology and Immunology
| | | | | | - Linda J Williams
- Columbia Center of Human Development.,Department of Medicine, and
| | | | - Hans-Willem Snoeck
- Columbia Center of Human Development.,Department of Microbiology and Immunology.,Department of Medicine, and.,Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York, USA
| |
Collapse
|
21
|
Abstract
DNA methylation is a dynamic epigenetic mark that characterizes different cellular developmental stages, including tissue-specific profiles. This CpG dinucleotide modification cooperates in the regulation of the output of the cellular genetic content, in both healthy and pathological conditions. According to endogenous and exogenous stimuli, DNA methylation is involved in gene transcription, alternative splicing, imprinting, X-chromosome inactivation, and control of transposable elements. When these dinucleotides are organized in dense regions are called CpG islands (CGIs), being commonly known as transcriptional regulatory regions frequently associated with the promoter region of several genes. In cancer, promoter DNA hypermethylation events sustained the mechanistic hypothesis of epigenetic transcriptional silencing of an increasing number of tumor suppressor genes. CGI hypomethylation-mediated reactivation of oncogenes was also documented in several cancer types. In this chapter, we aim to summarize the functional consequences of the differential DNA methylation at CpG dinucleotides in cancer, focused in CGIs. Interestingly, cancer methylome is being recently explored, looking for biomarkers for diagnosis, prognosis, and predictors of drug response.
Collapse
Affiliation(s)
- Humberto J Ferreira
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Catalonia, Spain
| | - Manel Esteller
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Catalonia, Spain.
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain.
- Department of Physiological Sciences II, School of Medicine, University of Barcelona, Barcelona, Catalonia, Spain.
| |
Collapse
|
22
|
Zhu S, Xu Y, Song M, Chen G, Wang H, Zhao Y, Wang Z, Li F. PRDM16 is associated with evasion of apoptosis by prostatic cancer cells according to RNA interference screening. Mol Med Rep 2016; 14:3357-61. [DOI: 10.3892/mmr.2016.5605] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 06/27/2016] [Indexed: 11/06/2022] Open
|
23
|
Miyazato P, Matsuo M, Katsuya H, Satou Y. Transcriptional and Epigenetic Regulatory Mechanisms Affecting HTLV-1 Provirus. Viruses 2016; 8:v8060171. [PMID: 27322309 PMCID: PMC4926191 DOI: 10.3390/v8060171] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/01/2016] [Accepted: 06/09/2016] [Indexed: 11/16/2022] Open
Abstract
Human T-cell leukemia virus type 1 (HTLV-1) is a retrovirus associated with human diseases, such as adult T-cell leukemia (ATL) and HTLV-1-associated myelopathy/Tropic spastic paraparesis (HAM/TSP). As a retrovirus, its life cycle includes a step where HTLV-1 is integrated into the host genomic DNA and forms proviral DNA. In the chronic phase of the infection, HTLV‑1 is known to proliferate as a provirus via the mitotic division of the infected host cells. There are generally tens of thousands of infected clones within an infected individual. They exist not only in peripheral blood, but also in various lymphoid organs. Viral proteins encoded in HTLV-1 genome play a role in the proliferation and survival of the infected cells. As is the case with other chronic viral infections, HTLV-1 gene expression induces the activation of the host immunity against the virus. Thus, the transcription from HTLV-1 provirus needs to be controlled in order to evade the host immune surveillance. There should be a dynamic and complex regulation in vivo, where an equilibrium between viral antigen expression and host immune surveillance is achieved. The mechanisms regulating viral gene expression from the provirus are a key to understanding the persistent/latent infection with HTLV-1 and its pathogenesis. In this article, we would like to review our current understanding on this topic.
Collapse
Affiliation(s)
- Paola Miyazato
- International Research Center for Medical Sciences, Center for AIDS Research, Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto 860-0811, Japan.
| | - Misaki Matsuo
- International Research Center for Medical Sciences, Center for AIDS Research, Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto 860-0811, Japan.
| | - Hiroo Katsuya
- International Research Center for Medical Sciences, Center for AIDS Research, Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto 860-0811, Japan.
| | - Yorifumi Satou
- International Research Center for Medical Sciences, Center for AIDS Research, Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto 860-0811, Japan.
| |
Collapse
|
24
|
PRDM16 Suppresses MLL1r Leukemia via Intrinsic Histone Methyltransferase Activity. Mol Cell 2016; 62:222-236. [PMID: 27151440 DOI: 10.1016/j.molcel.2016.03.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 12/10/2015] [Accepted: 03/07/2016] [Indexed: 12/22/2022]
Abstract
PRDM16 is a transcription co-factor that plays critical roles in development of brown adipose tissue, as well as maintenance of adult hematopoietic and neural stem cells. Here we report that PRDM16 is a histone H3K4 methyltransferase on chromatin. Mutation in the N-terminal PR domain of PRDM16 abolishes the intrinsic enzymatic activity of PRDM16. We show that the methyltransferase activity of PRDM16 is required for specific suppression of MLL fusion protein-induced leukemogenesis both in vitro and in vivo. Mechanistic studies show that PRDM16 directly activates the SNAG family transcription factor Gfi1b, which in turn downregulates the HOXA gene cluster. Knockdown Gfi1b represses PRDM16-mediated tumor suppression, while Gfi1b overexpression mimics PRDM16 overexpression. In further support of the tumor suppressor function of PRDM16, silencing PRDM16 by DNA methylation is concomitant with MLL-AF9-induced leukemic transformation. Taken together, our study reveals a previously uncharacterized function of PRDM16 that depends on its PR domain activity.
Collapse
|
25
|
Pera E, Kaemmerer E, Milevskiy MJG, Yapa KTDS, O'Donnell JS, Brown MA, Simpson F, Peters AA, Roberts-Thomson SJ, Monteith GR. The voltage gated Ca(2+)-channel Cav3.2 and therapeutic responses in breast cancer. Cancer Cell Int 2016; 16:24. [PMID: 27034617 PMCID: PMC4815142 DOI: 10.1186/s12935-016-0299-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 03/22/2016] [Indexed: 01/10/2023] Open
Abstract
Background Understanding the cause of therapeutic resistance and identifying new biomarkers in breast cancer to predict therapeutic responses will help optimise patient care. Calcium (Ca2+)-signalling is important in a variety of processes associated with tumour progression, including breast cancer cell migration and proliferation. Ca2+-signalling is also linked to the acquisition of multidrug resistance. This study aimed to assess the expression level of proteins involved in Ca2+-signalling in an in vitro model of trastuzumab-resistance and to assess the ability of identified targets to reverse resistance and/or act as potential biomarkers for prognosis or therapy outcome. Methods Expression levels of a panel of Ca2+-pumps, channels and channel regulators were assessed using RT-qPCR in resistant and sensitive age-matched SKBR3 breast cancer cells, established through continuous culture in the absence or presence of trastuzumab. The role of Cav3.2 in the acquisition of trastuzumab-resistance was assessed through pharmacological inhibition and induced overexpression. Levels of Cav3.2 were assessed in a panel of non-malignant and malignant breast cell lines using RT-qPCR and in patient samples representing different molecular subtypes (PAM50 cohort). Patient survival was also assessed in samples stratified by Cav3.2 expression (METABRIC and KM-Plotter cohort). Results Increased mRNA of Cav3.2 was a feature of both acquired and intrinsic trastuzumab-resistant SKBR3 cells. However, pharmacological inhibition of Cav3.2 did not restore trastuzumab-sensitivity nor did Cav3.2 overexpression induce the expression of markers associated with resistance, suggesting that Cav3.2 is not a driver of trastuzumab-resistance. Cav3.2 levels were significantly higher in luminal A, luminal B and HER2-enriched subtypes compared to the basal subtype. High levels of Cav3.2 were associated with poor outcome in patients with oestrogen receptor positive (ER+) breast cancers, whereas Cav3.2 levels were correlated positively with patient survival after chemotherapy in patients with HER2-positive breast cancers. Conclusion Our study identified elevated levels of Cav3.2 in trastuzumab-resistant SKBR3 cell lines. Although not a regulator of trastuzumab-resistance in HER2-positive breast cancer cells, Cav3.2 may be a potential differential biomarker for survival and treatment response in specific breast cancer subtypes. These studies add to the complex and diverse role of Ca2+-signalling in breast cancer progression and treatment. Electronic supplementary material The online version of this article (doi:10.1186/s12935-016-0299-0) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Elena Pera
- The School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, 20 Cornwall St, Woolloongabba, Brisbane, QLD Australia
| | - Elke Kaemmerer
- The School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, 20 Cornwall St, Woolloongabba, Brisbane, QLD Australia.,Mater Research Institute, The University of Queensland, Brisbane, QLD Australia.,Translational Research Institute, Brisbane, QLD Australia
| | - Michael J G Milevskiy
- The School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD Australia
| | - Kunsala T D S Yapa
- The School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, 20 Cornwall St, Woolloongabba, Brisbane, QLD Australia
| | - Jake S O'Donnell
- Translational Research Institute, Brisbane, QLD Australia.,Diamantina Institute, The University of Queensland, Brisbane, QLD Australia
| | - Melissa A Brown
- The School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD Australia
| | - Fiona Simpson
- Translational Research Institute, Brisbane, QLD Australia.,Diamantina Institute, The University of Queensland, Brisbane, QLD Australia
| | - Amelia A Peters
- The School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, 20 Cornwall St, Woolloongabba, Brisbane, QLD Australia
| | - Sarah J Roberts-Thomson
- The School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, 20 Cornwall St, Woolloongabba, Brisbane, QLD Australia
| | - Gregory R Monteith
- The School of Pharmacy, Pharmacy Australia Centre of Excellence, The University of Queensland, 20 Cornwall St, Woolloongabba, Brisbane, QLD Australia.,Mater Research Institute, The University of Queensland, Brisbane, QLD Australia.,Translational Research Institute, Brisbane, QLD Australia
| |
Collapse
|
26
|
The role of PRDMs in cancer: one family, two sides. Curr Opin Genet Dev 2016; 36:83-91. [DOI: 10.1016/j.gde.2016.03.009] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 03/24/2016] [Indexed: 12/24/2022]
|
27
|
Luchsinger LL, de Almeida MJ, Corrigan DJ, Mumau M, Snoeck HW. Mitofusin 2 maintains haematopoietic stem cells with extensive lymphoid potential. Nature 2016; 529:528-31. [PMID: 26789249 PMCID: PMC5106870 DOI: 10.1038/nature16500] [Citation(s) in RCA: 176] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 11/30/2015] [Indexed: 12/18/2022]
Abstract
Haematopoietic stem cells (HSCs), which sustain production of all blood cell lineages, rely on glycolysis for ATP production, yet little attention has been paid to the role of mitochondria. Here we show in mice that the short isoform of a critical regulator of HSCs, Prdm16 (refs 4, 5), induces mitofusin 2 (Mfn2), a protein involved in mitochondrial fusion and in tethering of mitochondria to the endoplasmic reticulum. Overexpression and deletion studies, including single-cell transplantation assays, revealed that Mfn2 is specifically required for the maintenance of HSCs with extensive lymphoid potential, but not, or less so, for the maintenance of myeloid-dominant HSCs. Mfn2 increased buffering of intracellular Ca(2+), an effect mediated through its endoplasmic reticulum-mitochondria tethering activity, thereby negatively regulating nuclear translocation and transcriptional activity of nuclear factor of activated T cells (Nfat). Nfat inhibition rescued the effects of Mfn2 deletion in HSCs, demonstrating that negative regulation of Nfat is the prime downstream mechanism of Mfn2 in the maintenance of HSCs with extensive lymphoid potential. Mitochondria therefore have an important role in HSCs. These findings provide a mechanism underlying clonal heterogeneity among HSCs and may lead to the design of approaches to bias HSC differentiation into desired lineages after transplantation.
Collapse
Affiliation(s)
- Larry L Luchsinger
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York 10032, USA.,Department of Medicine, Columbia University Medical Center, New York, New York 10032, USA
| | - Mariana Justino de Almeida
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York 10032, USA.,Department of Microbiology and Immunology, Columbia University Medical Center, New York, New York 10032, USA
| | - David J Corrigan
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York 10032, USA.,Department of Microbiology and Immunology, Columbia University Medical Center, New York, New York 10032, USA
| | - Melanie Mumau
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York 10032, USA.,Department of Microbiology and Immunology, Columbia University Medical Center, New York, New York 10032, USA
| | - Hans-Willem Snoeck
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, New York 10032, USA.,Department of Medicine, Columbia University Medical Center, New York, New York 10032, USA.,Department of Microbiology and Immunology, Columbia University Medical Center, New York, New York 10032, USA
| |
Collapse
|
28
|
Chi J, Cohen P. The Multifaceted Roles of PRDM16: Adipose Biology and Beyond. Trends Endocrinol Metab 2016; 27:11-23. [PMID: 26688472 DOI: 10.1016/j.tem.2015.11.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/05/2015] [Accepted: 11/09/2015] [Indexed: 01/07/2023]
Abstract
The PRDM [PRDI-BFI (positive regulatory domain I-binding factor 1) and RIZ1 (retinoblastoma protein-interacting zinc finger gene 1) homologous domain containing] protein family is involved in a spectrum of biological processes including cell fate determination and development. These proteins regulate transcription through intrinsic chromatin-modifying activity or by complexing with histone-modifying or other nuclear proteins. Studies have indicated crucial roles for PRDM16 in the determination and function of brown and beige fat as well as in hematopoiesis and cardiac development, highlighting the importance of PRDM16 in developmental processes in different tissues. More recently, PRDM16 mutations were also identified in humans. The substantial progress in understanding the mechanism underlying the action of PRDM16 in adipose biology may have relevance to other PRDM family members, and this new knowledge has the potential to be exploited for therapeutic benefit.
Collapse
Affiliation(s)
- Jingyi Chi
- The Rockefeller University, Laboratory of Molecular Metabolism, New York, NY 10065, USA
| | - Paul Cohen
- The Rockefeller University, Laboratory of Molecular Metabolism, New York, NY 10065, USA.
| |
Collapse
|
29
|
Dong S, Chen J. SUMOylation of sPRDM16 promotes the progression of acute myeloid leukemia. BMC Cancer 2015; 15:893. [PMID: 26559765 PMCID: PMC4641379 DOI: 10.1186/s12885-015-1844-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Accepted: 10/23/2015] [Indexed: 11/10/2022] Open
Abstract
Background In addition to genetic and epigenetic alteration, post-translational modification of proteins plays a critical role in the initiation, progression and maturation of acute myeloid leukemia (AML). Methods The SUMOylation site of sPRDM16 at K568 was mutated to arginine by site-directed mutagenesis. THP-1 acute myeloid leukemia cells were transduced with a lentivirus containing wild type or K568 mutant sPRDM16. Proliferation, self-renewal and differentiation of transduced THP-1 cells were analyzed both in vitro cell culture and in mouse xenografts. Gene expression profiles were analyzed by RNA-seq. Results Overexpression of sPRDM16 promoted proliferation, enhanced self-renewal capacity, but inhibited differentiation of THP-1 acute myeloid leukemia cells. We further confirmed that K568 is a bona fide SUMOylation site on sPRDM16. Mutation of the sPRDM16 SUMOylation site at K568 partially abolished the capacity of sPRDM16 to promote proliferation and inhibit differentiation of acute myeloid leukemia cells both in vitro and in mouse xenografts. Furthermore, THP-1 cells overexpressing sPRDM16-K568R mutant exhibited a distinct gene expression profile from wild type sPRDM16 following incubation with PMA. Conclusions Our results suggest that K568 SUMOylation of sPRDM16 plays an important role in the progression of acute myeloid leukemia.
Collapse
Affiliation(s)
- Song Dong
- Department of Hematology, Southwest Hospital, Third Military Medical University, 30 Gaotanyan Street, Chongqing, 400038, People's Republic of China.
| | - Jieping Chen
- Department of Hematology, Southwest Hospital, Third Military Medical University, 30 Gaotanyan Street, Chongqing, 400038, People's Republic of China.
| |
Collapse
|
30
|
Ouadid-Ahidouch H, Rodat-Despoix L, Matifat F, Morin G, Ahidouch A. DNA methylation of channel-related genes in cancers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2621-8. [PMID: 25703813 DOI: 10.1016/j.bbamem.2015.02.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 02/04/2015] [Accepted: 02/12/2015] [Indexed: 12/31/2022]
Abstract
DNA methylation at CpG sites is an epigenetic mechanism that regulates cellular gene expression. In cancer cells, aberrant methylation is correlated with the abnormalities in expression of genes that are known to be involved in the particular characteristics of cancer cells such as proliferation, apoptosis, migration or invasion. During the past 30 years, accumulating data have definitely convinced the scientific community that ion channels are involved in cancerogenesis and cancer properties. As they are situated at the cell surface, they might be prime targets in the development of new therapeutic strategies besides their potential use as prognostic factors. Despite the progress in our understanding of the remodeling of ion channels in cancer cells, the molecular mechanisms underlying their over- or down-expression remained enigmatic. In this review, we aimed to summarize the available data on gene promoter methylation of ion channels and to investigate their clinical significance as novel biomarkers in cancer. This article is part of a Special Issue entitled: Membrane channels and transporters in cancers.
Collapse
Affiliation(s)
- Halima Ouadid-Ahidouch
- UFR Sciences, EA 4667, Laboratory of Cell and Molecular Physiology, University of Picardie Jules Verne, SFR CAP-SANTE (FED 4231), Amiens, France.
| | - Lise Rodat-Despoix
- UFR Sciences, EA 4667, Laboratory of Cell and Molecular Physiology, University of Picardie Jules Verne, SFR CAP-SANTE (FED 4231), Amiens, France
| | - Fabrice Matifat
- UFR Sciences, EA 4667, Laboratory of Cell and Molecular Physiology, University of Picardie Jules Verne, SFR CAP-SANTE (FED 4231), Amiens, France
| | - Gilles Morin
- EA 4666 and Department of Molecular and Clinical Genetics, Amiens University Hospital, University of Picardie Jules Verne, Amiens, France
| | - Ahmed Ahidouch
- UFR Sciences, EA 4667, Laboratory of Cell and Molecular Physiology, University of Picardie Jules Verne, SFR CAP-SANTE (FED 4231), Amiens, France; Department of Biology, Faculty of Sciences, Ibn Zohr University, Agadir Morocco
| |
Collapse
|
31
|
Downregulation of Prdm16 mRNA is a specific antileukemic mechanism during HOXB4-mediated HSC expansion in vivo. Blood 2014; 124:1737-47. [PMID: 25082879 DOI: 10.1182/blood-2013-10-534735] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Overexpression of HOXB4 in hematopoietic stem cells (HSCs) leads to increased self-renewal without causing hematopoietic malignancies in transplanted mice. The molecular basis of HOXB4-mediated benign HSC expansion in vivo is not well understood. To gain further insight into the molecular events underlying HOXB4-mediated HSC expansion, we analyzed gene expression changes at multiple time points in Lin(-)Sca1(+)c-kit(+) cells from mice transplanted with bone marrow cells transduced with a MSCV-HOXB4-ires-YFP vector. A distinct HOXB4 transcriptional program was reproducibly induced and stabilized by 12 weeks after transplant. Dynamic expression changes were observed in genes critical for HSC self-renewal as well as in genes involved in myeloid and B-cell differentiation. Prdm16, a transcription factor associated with human acute myeloid leukemia, was markedly repressed by HOXB4 but upregulated by HOXA9 and HOXA10, suggesting that Prdm16 downregulation was involved in preventing leukemia in HOXB4 transplanted mice. Functional evidence to support this mechanism was obtained by enforcing coexpression of sPrdm16 and HOXB4, which led to enhanced self-renewal, myeloid expansion, and leukemia. Altogether, these studies define the transcriptional pathways involved in HOXB4 HSC expansion in vivo and identify repression of Prdm16 transcription as a mechanism by which expanding HSCs avoid leukemic transformation.
Collapse
|
32
|
Chen Y, Parker WD, Wang K. The role of T-type calcium channel genes in absence seizures. Front Neurol 2014; 5:45. [PMID: 24847307 PMCID: PMC4023043 DOI: 10.3389/fneur.2014.00045] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 03/24/2014] [Indexed: 12/05/2022] Open
Abstract
The thalamic relay neurons, reticular thalamic nucleus, and neocortical pyramidal cells form a circuit that sustains oscillatory burst firing, and is regarded as the underlying mechanism of absence seizures. T-type calcium channels play a key role in this circuit. Here, we review the role of T-type calcium channel genes in the development of absence seizures, and emphasize gain or loss of function mutations, and other variations that alter both quantity and quality of transcripts, and methylation status of isoforms of T-type calcium channel proteins might be of equal importance in understanding the pathological mechanism of absence seizures.
Collapse
Affiliation(s)
- Yucai Chen
- University of Illinois at Chicago , Peoria, IL , USA
| | | | - Keling Wang
- Hebei Children Hospital , Shijiazhuang , China
| |
Collapse
|
33
|
Zhang Y, Wang H, Qian Z, Feng B, Zhao X, Jiang X, Tao J. Low-voltage-activated T-type Ca2+ channel inhibitors as new tools in the treatment of glioblastoma: the role of endostatin. Pflugers Arch 2014; 466:811-8. [PMID: 24407946 DOI: 10.1007/s00424-013-1427-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 12/16/2013] [Accepted: 12/18/2013] [Indexed: 11/25/2022]
Abstract
Ca(2+) plays a key role in intracellular signaling and controls various cellular processes such as proliferation, differentiation, cell growth, death, and apoptosis. Aberrant changes in intracellular Ca(2+) levels can promote undesired cell proliferation and migration and are therefore associated with certain tumor types. Many research groups have suggested a potential role for voltage-gated Ca(2+) channels in the regulation of tumor growth and progression, particularly T-type channels due to their unique biophysical properties. T-type channels are expressed in normal tissues throughout the body and in different types of tumors such as breast carcinoma, retinoblastoma, neuroblastoma, and glioma. It has been demonstrated that increased functional expression of the α1 subunit of T-type channels plays a role in the abnormal proliferation of glioblastoma cells. As such, siRNA-mediated knockdown of the expression of the α1 subunit of T-type channels decreases the proliferation of these cells. Moreover, pharmacological blockade of T-type channels significantly decreases tumor growth. In this review, we focus on the use of T-type channel blockers for the potential treatment of cancers, particularly highly proliferative tumors such as glioblastoma. We conclude that T-type channel blockers such as endostatin can serve as a potential therapeutic tool for tumors whose proliferation depends on increased T-type channel expression.
Collapse
Affiliation(s)
- Yuan Zhang
- The Special Procurement Ward, Department of Geriatrics & Neurology, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | | | | | | | | | | | | |
Collapse
|
34
|
Satou Y, Matsuoka M. Virological and immunological mechanisms in the pathogenesis of human T-cell leukemia virus type 1. Rev Med Virol 2013; 23:269-80. [PMID: 23606621 DOI: 10.1002/rmv.1745] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 03/17/2013] [Accepted: 03/18/2013] [Indexed: 12/17/2022]
Abstract
Human T-cell leukemia virus type 1 (HTLV-1) was the first retrovirus shown to cause human disease, such as adult T-cell leukemia and HTLV-1 associated myelopathy/tropic spastic paraparesis. HTLV-1 mainly infects CD4 T cells and deregulates their differentiation, function and homeostasis, which should contribute to the pathogenesis of HTLV-1, for example, inducing transformation of infected CD4 T cells and chronic inflammatory diseases. Therefore, not only virological approach but also immunological approach regarding CD4 T cells are required to understand how HTLV-1 causes related human diseases. This review focuses on recent advances in our understanding of the interaction between HTLV-1 and the main host cell, CD4 T cells, which should provide us some clue to the mechanisms of HTLV-1 mediated pathogenesis.
Collapse
Affiliation(s)
- Yorifumi Satou
- Laboratory for Virus Control, Institute for Virus Research, Kyoto University, Kyoto, Japan.
| | | |
Collapse
|
35
|
Abstract
One of the most promising areas in the therapeutics for metabolic diseases centers around activation of the pathways of energy expenditure. Brown adipose tissue is a particularly appealing target for increasing energy expenditure, given its amazing capacity to transform chemical energy into heat. In addition to classical brown adipose tissue, the last few years have seen great advances in our understanding of inducible thermogenic adipose tissue, also referred to as beige fat. A deeper understanding of the molecular processes involved in the development and function of these cell types may lead to new therapeutics for obesity, diabetes, and other metabolic diseases.
Collapse
|
36
|
Yamagishi M, Watanabe T. Molecular hallmarks of adult T cell leukemia. Front Microbiol 2012; 3:334. [PMID: 23060864 PMCID: PMC3444139 DOI: 10.3389/fmicb.2012.00334] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 08/29/2012] [Indexed: 12/20/2022] Open
Abstract
The molecular hallmarks of adult T cell leukemia (ATL) comprise outstanding deregulations of signaling pathways that control the cell cycle, resistance to apoptosis, and proliferation of leukemic cells, all of which have been identified by early excellent studies. Nevertheless, we are now confronted the therapeutic difficulties of ATL that is a most aggressive T cell leukemia/lymphoma. Using next-generation strategies, emerging molecular characteristics such as specific surface markers and an additional catalog of signals affecting the fate of leukemic cells have been added to the molecular hallmarks that constitute an organizing principle for rationalizing the complexities of ATL. Although human T cell leukemia virus type 1 is undoubtedly involved in ATL leukemogenesis, most leukemic cells do not express the viral protein Tax. Instead, cellular gene expression changes dominate homeostasis disorders of infected cells and characteristics of ATL. In this review, we summarize the state of the art of ATL molecular pathology, which supports the biological properties of leukemic cells. In addition, we discuss the recent discovery of two molecular hallmarks of potential generality; an abnormal microRNA pattern and epigenetic reprogramming, which strongly involve the imbalance of the molecular network of lymphocytes. Global analyses of ATL have revealed the functional impact of crosstalk between multifunctional pathways. Clinical and biological studies on signaling inhibitory agents have also revealed novel oncogenic drivers that can be targeted in future. ATL cells, by deregulation of such pathways and their interconnections, may become masters of their own destinies. Recognizing and understanding of the widespread molecular applicability of these concepts will increasingly affect the development of novel strategies for treating ATL.
Collapse
Affiliation(s)
- Makoto Yamagishi
- Laboratory of Tumor Cell Biology, Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo Minato-ku, Tokyo, Japan
| | | |
Collapse
|
37
|
Karinen S, Saarinen S, Lehtonen R, Rastas P, Vahteristo P, Aaltonen LA, Hautaniemi S. Rule-based induction method for haplotype comparison and identification of candidate disease loci. Genome Med 2012; 4:21. [PMID: 22429919 PMCID: PMC3446271 DOI: 10.1186/gm320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 03/19/2012] [Indexed: 11/21/2022] Open
Abstract
There is a need for methods that are able to identify rare variants that cause low or moderate penetrance disease susceptibility. To answer this need, we introduce a rule-based haplotype comparison method, Haplous, which identifies haplotypes within multiple samples from phased genotype data and compares them within and between sample groups. We demonstrate that Haplous is able to accurately identify haplotypes that are identical by descent, exclude common haplotypes in the studied population and select rare haplotypes from the data. Our analysis of three families with multiple individuals affected by lymphoma identified several interesting haplotypes shared by distantly related patients.
Collapse
Affiliation(s)
- Sirkku Karinen
- Research Programs Unit, Genome-Scale Biology, and Institute of Biomedicine, Biochemistry and Developmental Biology, University of Helsinki, Haartmaninkatu 8, Helsinki, FIN-00014, Finland.
| | | | | | | | | | | | | |
Collapse
|
38
|
Duhoux FP, Ameye G, Montano-Almendras CP, Bahloula K, Mozziconacci MJ, Laibe S, Wlodarska I, Michaux L, Talmant P, Richebourg S, Lippert E, Speleman F, Herens C, Struski S, Raynaud S, Auger N, Nadal N, Rack K, Mugneret F, Tigaud I, Lafage M, Taviaux S, Roche-Lestienne C, Latinne D, Libouton JM, Demoulin JB, Poirel HA. PRDM16 (1p36) translocations define a distinct entity of myeloid malignancies with poor prognosis but may also occur in lymphoid malignancies. Br J Haematol 2011; 156:76-88. [DOI: 10.1111/j.1365-2141.2011.08918.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
39
|
Fog CK, Galli GG, Lund AH. PRDM proteins: important players in differentiation and disease. Bioessays 2011; 34:50-60. [PMID: 22028065 DOI: 10.1002/bies.201100107] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The PRDM family has recently spawned considerable interest as it has been implicated in fundamental aspects of cellular differentiation and exhibits expanding ties to human diseases. The PRDMs belong to the SET domain family of histone methyltransferases, however, enzymatic activity has been determined for only few PRDMs suggesting that they act by recruiting co-factors or, more speculatively, confer methylation of non-histone targets. Several PRDM family members are deregulated in human diseases, most prominently in hematological malignancies and solid cancers, where they can act as both tumor suppressors or drivers of oncogenic processes. The molecular mechanisms have been delineated for only few PRDMs and little is known about functional redundancy within the family. Future studies should identify target genes of PRDM proteins and the protein complexes in which PRDM proteins reside to provide a more comprehensive understanding of the biological and biochemical functions of this important protein family.
Collapse
Affiliation(s)
- Cathrine K Fog
- Biotech Research and Innovation Centre and Centre for Epigenetics, University of Copenhagen, Denmark
| | | | | |
Collapse
|
40
|
Abstract
Human T-cell leukemia virus type 1 (HTLV-1) is an oncogenic retrovirus that is etiologically associated with adult T-cell leukemia. The HTLV-1 bZIP factor (HBZ), which is encoded by the minus strand of the provirus, is involved in both regulation of viral gene transcription and T-cell proliferation. We showed in this report that HBZ interacted with Smad2/3, and enhanced transforming growth factor-β (TGF-β)/Smad transcriptional responses in a p300-dependent manner. The N-terminal LXXLL motif of HBZ was responsible for HBZ-mediated TGF-β signaling activation. In a serial immunoprecipitation assay, HBZ, Smad3, and p300 formed a ternary complex, and the association between Smad3 and p300 was markedly enhanced in the presence of HBZ. In addition, HBZ could overcome the repression of the TGF-β response by Tax. Finally, HBZ expression resulted in enhanced transcription of Pdgfb, Sox4, Ctgf, Foxp3, Runx1, and Tsc22d1 genes and suppression of the Id2 gene; such effects were similar to those by TGF-β. In particular, HBZ induced Foxp3 expression in naive T cells through Smad3-dependent TGF-β signaling. Our results suggest that HBZ, by enhancing TGF-β signaling and Foxp3 expression, enables HTLV-1 to convert infected T cells into regulatory T cells, which is thought to be a critical strategy for virus persistence.
Collapse
|
41
|
Horn KH, Warner DR, Pisano M, Greene RM. PRDM16 expression in the developing mouse embryo. Acta Histochem 2011; 113:150-5. [PMID: 19853285 DOI: 10.1016/j.acthis.2009.09.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Revised: 09/10/2009] [Accepted: 09/16/2009] [Indexed: 11/29/2022]
Abstract
PRDM16 is a member of the PR domain-containing protein family and is associated with various disease states including myelodysplastic syndrome and adult T-cell leukemia, as well as developmental abnormalities such as cleft palate. It is also known to act as a regulator of cell differentiation. Expression analysis of PRDM16 is limited, especially within the developing embryo. The current study evaluated the temporal and spatial localization of PRDM16 during early mouse development (embryonic days 8.5-14.5). PRDM16 was first detected on E9.5 in a limited number of tissues and by E14.5, was expressed in a broad range of developing tissues including those of the brain, lung, kidney, and gastrointestinal tract. The expression pattern is consistent with a role for PRDM16 in the development of multiple tissues. Collectively, these studies are the first to characterize the expression of the PRDM16 gene during early murine development.
Collapse
Affiliation(s)
- Kristin H Horn
- University of Louisville Birth Defects Center, Department of Molecular, Cellular and Craniofacial Biology, School of Dentistry, 501 South Preston Street, Louisville, KY 40292, USA
| | | | | | | |
Collapse
|
42
|
Downregulation of ZEB1 and overexpression of Smad7 contribute to resistance to TGF-β1-mediated growth suppression in adult T-cell leukemia/lymphoma. Oncogene 2010; 29:4157-69. [DOI: 10.1038/onc.2010.172] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
43
|
Abstract
Caveolin-1 is implicated in the regulation of signal pathways. Adult T-cell leukemia (ATL) is a T-cell malignancy causatively associated with human T-cell leukemia virus type 1 (HTLV-1). To determine the role of caveolin-1 in leukemogenesis, we examined caveolin-1 expression levels in HTLV-1-infected T-cell lines and ATL cells. These cells expressed high levels of caveolin-1 compared with uninfected T-cell lines and normal peripheral blood mononuclear cells (PBMCs). Caveolin-1-positive ATL cells were detected in ATL lymph nodes and skin lesions, and caveolin-1 was also detected in the plasma of patients with ATL. Infection of a human T-cell line, an epithelial cell line, and normal PBMCs with HTLV-1 induced caveolin-1 expression. The viral protein Tax transcriptionally activated caveolin-1 gene through nuclear factor-kappaB and cAMP response element binding protein signal pathways. HTLV-1-infected T-cell lines, and ATL cells are known to be resistant to transforming growth factor beta (TGF-beta)-induced growth inhibition. Caveolin-1 was colocalized with TGF-beta type I receptor in HTLV-1-infected T-cell lines and suppressed TGF-beta signaling. Caveolin-1 knockdown in an HTLV-1-infected T-cell line exhibited susceptibility to TGF-beta. Thus, we describe a new function for Tax, repression of TGF-beta signaling through caveolin-1 expression, which may play a critical role in ATL leukemogenesis.
Collapse
|
44
|
Pogribny IP, Beland FA. DNA hypomethylation in the origin and pathogenesis of human diseases. Cell Mol Life Sci 2009; 66:2249-61. [PMID: 19326048 PMCID: PMC11115809 DOI: 10.1007/s00018-009-0015-5] [Citation(s) in RCA: 167] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 02/25/2009] [Accepted: 03/06/2009] [Indexed: 12/15/2022]
Abstract
The pathogenesis of any given human disease is a complex multifactorial process characterized by many biologically significant and interdependent alterations. One of these changes, specific to a wide range of human pathologies, is DNA hypomethylation. DNA hypomethylation signifies one of the major DNA methylation states that refers to a relative decrease from the "normal" methylation level. It is clear that disease by itself can induce hypomethylation of DNA; however, a decrease in DNA methylation can also have an impact on the predisposition to pathological states and disease development. This review presents evidence suggesting the involvement of DNA hypomethylation in the pathogenesis of several major human pathologies, including cancer, atherosclerosis, Alzheimer's disease, and psychiatric disorders.
Collapse
Affiliation(s)
- Igor P Pogribny
- Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
| | | |
Collapse
|
45
|
Transcriptional control of brown adipocyte development and physiological function--of mice and men. Genes Dev 2009; 23:788-97. [PMID: 19339685 DOI: 10.1101/gad.1779209] [Citation(s) in RCA: 231] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The last several years have seen an explosion of information relating to the transcriptional control of brown fat cell development. At the same time, new data have emerged that clearly demonstrate that adult humans do indeed have substantial amounts of functioning brown adipose tissue (BAT). Together, these advances are stimulating a reassessment of the role of brown adipose tissue in human physiology and pathophysiology. These data have also opened up exciting new opportunities for the development of entirely novel classes of therapeutics for metabolic diseases like obesity and type 2 diabetes.
Collapse
|
46
|
Deluche L, Joha S, Corm S, Daudignon A, Geffroy S, Quief S, Villenet C, Kerckaert JP, Laï JL, Preudhomme C, Roche-Lestienne C. Cryptic and partial deletions of PRDM16 and RUNX1 without t(1;21)(p36;q22) and/or RUNX1-PRDM16 fusion in a case of progressive chronic myeloid leukemia: a complex chromosomal rearrangement of underestimated frequency in disease progression? Genes Chromosomes Cancer 2008; 47:1110-7. [PMID: 18767145 DOI: 10.1002/gcc.20611] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Chronic myeloid leukemia (CML) is a myeloproliferative disorder characterized by the presence in leukemic stem cells of the Philadelphia chromosome (Ph) and the formation of the BCR-ABL1 fusion. Untreated, the disease progresses to accelerate phase and blast crisis in which hematopoietic differentiation has become arrested. CML progression is frequently associated with cytogenetic evidence of clonal evolution, defined as additional chromosomal aberrations. We here report a CML resistant to tyrosine kinase inhibitors that rapidly progressed to blastic phase. At this time, array CGH performed on CD34(+) cells revealed cryptic partial deletions of both PRDM16 and RUNX1 and duplication of the der(21) chromosome. These genomic rearrangements were confirmed by FISH with probes targeting the deletion on chromosome 21 (24 kb), and with BAC probes flanking the deletion on 1p36 (220 kb). However, no cryptic t(1;21)(p36;q22) and/or RUNX1-PRDM16 were detected, suggesting that these deletions are the residual hallmarks of a more complex mechanism of chromosomal rearrangement, as indicated by the additional inversion of the region bounded by 1p36.32 and 1p36.12 breaks. At the molecular level, these abnormalities lead to the overexpression of the PR-domain negative oncogenic isoform of PRDM16, associated with two deleted copies within the runt domain of C-teminal aberrant RUNX1. These events are not detectable by conventional cytogenetic and molecular strategies, and may be of underestimated frequency in disease progression.
Collapse
Affiliation(s)
- Lauréline Deluche
- Cancer Research Institute of Lille, JP Aubert Center, Inserm Unit 837, Lille, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Takai K, Sakamoto S, Sakai T, Yasunaga JI, Komatsu K, Matsuoka M. A potential link between alternative splicing of the NBS1 gene and DNA damage/environmental stress. Radiat Res 2008; 170:33-40. [PMID: 18582154 DOI: 10.1667/rr1191.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2007] [Accepted: 03/19/2008] [Indexed: 11/03/2022]
Abstract
NBS1 forms a multimetric complex with MRE11/RAD50, which acts as the sensor of DNA double-strand breaks (DSBs). The mechanisms controlling the expression of NBS1 remain largely unknown. Here we show that NBS1 is transcribed as both a wild-type and an alternatively spliced form exhibiting a premature stop codon in an alternative 50-bp exon in intron 2. Although the wild-type transcript predominates in most tissues, the spliced transcript is abundant in resting peripheral blood mononuclear cells (PBMCs). Levels of the spliced form of NBS1 decreased rapidly after irradiation as levels of the wild-type NBS1 transcript increased, resulting in increased levels of NBS1 protein. Both mitogenic stimulation and methyl methanesulfonate treatment also altered the splicing pattern of NBS1. Resting PBMCs, which predominantly express spliced NBS1, were more susceptible to radiation than mitogen-stimulated cells, which showed predominant expression of the wild-type transcript. Since the alternatively spliced NBS1 gene likely did not produce protein, this alternative splicing seems to be associated with the control of NBS1 protein. Thus alternative splicing of the NBS1 gene may be associated with the regulation of NBS1 in response to DSBs, DNA alkylation damage, and mitogenic response.
Collapse
Affiliation(s)
- Ken Takai
- Laboratory of Virus Control, Institute for Virus Research, Kyoto University, 53 Shogoin Kawara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | | | | | | | | | | |
Collapse
|
48
|
Kajimura S, Seale P, Tomaru T, Erdjument-Bromage H, Cooper MP, Ruas JL, Chin S, Tempst P, Lazar MA, Spiegelman BM. Regulation of the brown and white fat gene programs through a PRDM16/CtBP transcriptional complex. Genes Dev 2008; 22:1397-409. [PMID: 18483224 DOI: 10.1101/gad.1666108] [Citation(s) in RCA: 343] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Brown fat is a specialized tissue that can dissipate energy and counteract obesity through a pattern of gene expression that greatly increases mitochondrial content and uncoupled respiration. PRDM16 is a zinc-finger protein that controls brown fat determination by stimulating brown fat-selective gene expression, while suppressing the expression of genes selective for white fat cells. To determine the mechanisms regulating this switching of gene programs, we purified native PRDM16 protein complexes from fat cells. We show here that the PRDM16 transcriptional holocompex contains C-terminal-binding protein-1 (CtBP-1) and CtBP-2, and this direct interaction selectively mediates the repression of white fat genes. This repression occurs through recruiting a PRDM16/CtBP complex onto the promoters of white fat-specific genes such as resistin, and is abolished in the genetic absence of CtBP-1 and CtBP-2. In turn, recruitment of PPAR-gamma-coactivator-1alpha (PGC-1alpha) and PGC-1beta to the PRDM16 complex displaces CtBP, allowing this complex to powerfully activate brown fat genes, such as PGC-1alpha itself. These data show that the regulated docking of the CtBP proteins on PRDM16 controls the brown and white fat-selective gene programs.
Collapse
Affiliation(s)
- Shingo Kajimura
- Dana-Farber Cancer Institute and the Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Laybourn P. The ups and downs of Tax and histones in adult T-cell leukemogenesis. Future Oncol 2008; 4:311-7. [PMID: 18518755 DOI: 10.2217/14796694.4.3.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
50
|
Down-regulation of TCF8 is involved in the leukemogenesis of adult T-cell leukemia/lymphoma. Blood 2008; 112:383-93. [PMID: 18467597 DOI: 10.1182/blood-2008-01-131185] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Adult T-cell leukemia/lymphoma (ATLL) is caused by latent human T-lymphotropic virus-1 (HTLV-1) infection. To clarify the molecular mechanism underlying leukemogenesis after viral infection, we precisely mapped 605 chromosomal breakpoints in 61 ATLL cases by spectral karyotyping and identified frequent chromosomal breakpoints in 10p11, 14q11, and 14q32. Single nucleotide polymorphism (SNP) array-comparative genomic hybridization (CGH), genetic, and expression analyses of the genes mapped within a common breakpoint cluster region in 10p11.2 revealed that in ATLL cells, transcription factor 8 (TCF8) was frequently disrupted by several mechanisms, including mainly epigenetic dysregulation. TCF8 mutant mice frequently developed invasive CD4(+) T-cell lymphomas in the thymus or in ascitic fluid in vivo. Down-regulation of TCF8 expression in ATLL cells in vitro was associated with resistance to transforming growth factor beta1 (TGF-beta1), a well-known characteristic of ATLL cells, suggesting that escape from TGF-beta1-mediated growth inhibition is important in the pathogenesis of ATLL. These findings indicate that TCF8 has a tumor suppressor role in ATLL.
Collapse
|