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Chen K, Zhang J, Meng L, Kong L, Lu M, Wang Z, Wang W. The epigenetic downregulation of LncGHRLOS mediated by RNA m6A methylase ZCCHC4 promotes colorectal cancer tumorigenesis. J Exp Clin Cancer Res 2024; 43:44. [PMID: 38326863 PMCID: PMC10848513 DOI: 10.1186/s13046-024-02965-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 01/22/2024] [Indexed: 02/09/2024] Open
Abstract
BACKGROUND m6A modification is currently recognized as a major driver of RNA function that maintains cancer cell homeostasis. Long non-coding (Lnc) RNAs control cell proliferation and play an important role in the occurrence and progression of colorectal cancer (CRC). ZCCHC4 is a newly discovered m6A methyltransferase whose role and mechanism in tumors have not yet been elucidated. METHODS The EpiQuik m6A RNA methylation kit was used to detect the level of total RNA m6A in six types of digestive tract tumors. The Kaplan-Meier method and receiver operating characteristic curve were used to evaluate the prognostic and diagnostic value of the newly discovered m6A methyltransferase, ZCCHC4, in CRC. The effects on CRC growth in vitro and in vivo were studied using gain- and loss-of-function experiments. The epigenetic mechanisms underlying ZCCHC4 upregulation in CRC were studied using RIP, MeRIP-seq, RNA pull-down, and animal experiments. RESULTS We reported that the ZCCHC4-LncRNAGHRLOS-KDM5D axis regulates the growth of CRC in vitro and in vivo. We found that ZCCHC4 was upregulated in primary CRC samples and could predict adverse clinical outcomes in patients with CRC. Mechanistically, ZCCHC4 downregulated LncRNAGHRLOS to promote CRC tumorigenesis. As a downstream molecule of LncRNAGHRLOS, KDM5D directly controls CRC cell proliferation, migration, and invasion. CONCLUSION This study suggests that the ZCCHC4 axis contributes to the tumorigenesis and progression of CRC and that ZCCHC4 may be a potential biomarker for this malignancy.
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Affiliation(s)
- Ke Chen
- Vascular Surgery Department, Nanjing Drum Tower Hospital Affiliated to Medical School of Nanjing University, Nanjing, China
| | - Jingcheng Zhang
- Department of Surgery, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
| | - Lei Meng
- General Surgery Department, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Lingshang Kong
- General Surgery Department, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Ming Lu
- General Surgery Department, Anhui Provincial Hospital, Hefei, China
| | - Zhengguang Wang
- General Surgery Department, The First Affiliated Hospital of Anhui Medical University, Hefei, China.
| | - Wenbin Wang
- General Surgery Department, The Second Affiliated Hospital of Anhui Medical University, Hefei, China.
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Ura A, Hayashi T, Komura K, Hosoya M, Takamochi K, Sato E, Saito S, Wakai S, Handa T, Saito T, Kato S, Suzuki K, Yao T. Copy number loss of KDM5D may be a predictive biomarker for ATR inhibitor treatment in male patients with pulmonary squamous cell carcinoma. J Pathol Clin Res 2024; 10:e350. [PMID: 37974379 PMCID: PMC10766025 DOI: 10.1002/cjp2.350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 09/30/2023] [Accepted: 10/25/2023] [Indexed: 11/19/2023]
Abstract
A limited number of patients with lung squamous cell carcinoma (SCC) benefit clinically from molecular targeted drugs because of a lack of targetable driver alterations. We aimed to understand the prevalence and clinical significance of lysine-specific demethylase 5D (KDM5D) copy number loss in SCC and explore its potential as a predictive biomarker for ataxia-telangiectasia and Rad3-related (ATR) inhibitor treatment. We evaluated KDM5D copy number loss in 173 surgically resected SCCs from male patients using fluorescence in situ hybridization. KDM5D copy number loss was detected in 75 of the 173 patients (43%). Genome-wide expression profiles of the transcription start sites (TSSs) were obtained from 17 SCCs, for which the cap analysis of gene expression assay was performed, revealing that upregulated genes in tumors with the KDM5D copy number loss are associated with 'cell cycle', whereas downregulated genes in tumors with KDM5D copy number loss were associated with 'immune response'. Clinicopathologically, SCCs with KDM5D copy number loss were associated with late pathological stage (p = 0.0085) and high stromal content (p = 0.0254). Multiplexed fluorescent immunohistochemistry showed that the number of tumor-infiltrating CD8+ /T-bet+ T cells was lower in SCCs with KDM5D copy number loss than in wild-type tumors. In conclusion, approximately 40% of the male patients with SCC exhibited KDM5D copy number loss. Tumors in patients who show this distinct phenotype can be 'cold tumors', which are characterized by the paucity of tumor T-cell infiltration and usually do not respond to immunotherapy. Thus, they may be candidates for trials with ATR inhibitors.
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Affiliation(s)
- Ayako Ura
- Department of Human PathologyJuntendo University Graduate School of MedicineTokyoJapan
| | - Takuo Hayashi
- Department of Human PathologyJuntendo University Graduate School of MedicineTokyoJapan
| | - Kazumasa Komura
- Department of UrologyOsaka Medical and Pharmaceutical UniversityOsakaJapan
- Translational Research ProgramOsaka Medical and Pharmaceutical UniversityOsakaJapan
| | - Masaki Hosoya
- Department of Clinical OncologyJuntendo University Graduate School of MedicineTokyoJapan
| | - Kazuya Takamochi
- Department of General Thoracic SurgeryJuntendo University Graduate School of MedicineTokyoJapan
| | - Eiichi Sato
- Department of PathologyInstitute of Medical Science (Medical Research Center), Tokyo Medical UniversityTokyoJapan
| | - Satomi Saito
- Department of Human PathologyJuntendo University Graduate School of MedicineTokyoJapan
| | - Susumu Wakai
- Division of Clinical LaboratoryNational Center for Global Health and MedicineTokyoJapan
| | - Takafumi Handa
- Department of Human PathologyJuntendo University Graduate School of MedicineTokyoJapan
| | - Tsuyoshi Saito
- Department of Human PathologyJuntendo University Graduate School of MedicineTokyoJapan
| | - Shunsuke Kato
- Department of Clinical OncologyJuntendo University Graduate School of MedicineTokyoJapan
| | - Kenji Suzuki
- Department of General Thoracic SurgeryJuntendo University Graduate School of MedicineTokyoJapan
| | - Takashi Yao
- Department of Human PathologyJuntendo University Graduate School of MedicineTokyoJapan
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Schäfer G, Bednarova N, Heidenreich A, Klocker H, Heidegger I. KDM5D predicts response to docetaxel chemotherapy in metastatic castration resistant prostate cancer patients. Transl Androl Urol 2021; 10:3946-3952. [PMID: 34804837 PMCID: PMC8575572 DOI: 10.21037/tau-20-1084] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 01/21/2021] [Indexed: 12/26/2022] Open
Abstract
Background The administration of docetaxel chemotherapy is one therapeutic option to delay disease progression and increase overall survival in metastatic castration resistant prostate cancer (mCRPC). However, about 15% of patients are primary resistant to chemotherapy and hence would benefit from an alternative mCRPC treatment. Despite intensive research, there are no robust clinical validated biomarkers to predict mCRPC therapy response. Thus, the aim of the study was to determine KDM5D expression in archival radical prostatectomy specimens of patients medicated with docetaxel at time of mCRPC development in order to correlate KMD5D expression with treatment response. Methods We used in situ hybridization (ISH) (RNA scope 2.5 HD) to determine KDM5D expression in tissue samples of 28 prostate cancer patients. KDM5D status was correlated to chemotherapy response (PSA and radiographic response). Results Data revealed that KDM5D is significantly overexpressed in tumor cells (P<0.0001) but also in benign cells (P<0.02) of those patients who responded to chemotherapy compared to non-responders. Conclusions To summarize, KDM5D is a promising novel biomarker predicting response to docetaxel chemotherapy already at the time of localized disease and thus potentially avoiding metastatic biopsies in the mCRPC stage of disease.
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Affiliation(s)
- Georg Schäfer
- Department of Pathology, Medical University of Innsbruck, Innsbruck, Austria
| | - Nikola Bednarova
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Axel Heidenreich
- Department of Urology, Uro-Oncology, Robot-Assisted and Specialized Urological Surgery, University Hospital Cologne, Cologne, Germany
| | - Helmut Klocker
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Isabel Heidegger
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
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4
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Liu M, Gao N. KDM5D inhibits the transcriptional activation of FKBP4 by suppressing the expression of E2F1 in colorectal cancer in males. Biochem Pharmacol 2021; 194:114814. [PMID: 34688635 DOI: 10.1016/j.bcp.2021.114814] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 10/17/2021] [Accepted: 10/19/2021] [Indexed: 11/21/2022]
Abstract
Colorectal cancer (CRC) remains the most frequently diagnosed malignancy and also a major contributor to cancer-related death throughout the world. Here, we first revealed the role of histone lysine-specific demethylase 5D (KDM5D) in CRC in males. KDM5D expression in tumor and adjacent tissues of male CRC patients was investigated using immunohistochemistry and RT-qPCR, and the correlation between its expression and patients' prognosis was analyzed. Downregulation of KDM5D in CRC patients was associated with poor prognoses. Overexpression of KDM5D significantly inhibited the growth and metastasis of CRC in vitro and in vivo. The downstream mechanism of KDM5D in CRC was investigated using bioinformatics analysis, and the regulatory relationship was confirmed by ChIP-qPCR and luciferase reporter assays. KDM5D suppressed E2F1 expression by mediating H3K4me3 demethylation. E2F1, highly expressed in CRC, promoted the expression of FKBP4 at the transcriptional level by binding to the FKBP4 promoter. Finally, rescue experiments revealed that overexpression of FKBP4 significantly reversed the inhibitory effect of KDM5D on CRC growth and metastasis. Collectively, KDM5D exerted an anti-tumor and anti-metastatic in CRC through demethylation in E2F1 and suppression of FKBP4 transcription, which might represent a novel target in CRC treatment in male.
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Gu J, Chu K. Increased Mars2 expression upon microRNA-4661-5p-mediated KDM5D downregulation is correlated with malignant degree of gastric cancer cells. Cell Biol Int 2021; 45:2118-2128. [PMID: 34273914 DOI: 10.1002/cbin.11661] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 06/28/2021] [Accepted: 07/05/2021] [Indexed: 12/30/2022]
Abstract
Gastric cancer (GC) is the fifth most common malignancy and the third leading cause of cancer-related mortality worldwide. Methionyl-tRNA synthetase 2 (Mars2) has been suggested as a biomarker indicating poor prognosis of cancers. This study focuses on the function of Mars2 in GC and the responsible molecules. Mars2 was highly expressed in GC patients according to a transcriptome analysis and the data from the public database, and its high expression was confirmed in the acquired GC cell lines. Downregulation of Mars2 significantly weakened the proliferation, resistance to death, migration and invasion of GC cells. The H3K4me3 modification level was increased in the promoter region of Mars2, which was attributed to reduced abundance of lysine demethylase 5D (KDM5D) in the Mars2 promoter. MicroRNA (miR)-4661-5p was identified as an upstream regulator of KDM5D. Downregulation of miR-4661-5p led to an increase in the expression of KDM5D while a decline in the expression of Mars2, which reduced the malignant behaviors of GC cells; however, the malignant behaviors of GC cells was restored after further inhibition of KDM5D. To conclude, this study suggested that increased Mars2 expression upon miR-4661-5p-mediated KDM5D downregulation is correlated with malignant degree of GC cells.
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Affiliation(s)
- Jie Gu
- Department of Gastroenterology, Suzhou Hospital of Integrated Traditional Chinese and Western Medicine, Suzhou, Jiangsu, China
| | - Kaifeng Chu
- Department of Hepatology, Suzhou Hospital of Integrated Traditional Chinese and Western Medicine, Suzhou, Jiangsu, China
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Pottmeier P, Doszyn O, Peuckert C, Jazin E. Increased Expression of Y-Encoded Demethylases During Differentiation of Human Male Neural Stem Cells. Stem Cells Dev 2020; 29:1497-1509. [PMID: 33040644 DOI: 10.1089/scd.2020.0138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Human neural stem cells (hNSCs) have long been used as an in vitro model to study neurogenesis and as candidates for nervous system therapy. Many parameters have been considered when evaluating the success of transplantation, but sex of donor and recipients is often not discussed. We investigated two commercial NSC lines, the female hNSC-H9 and male hNSC-H14, and we observed faster growth rates in the male cells. At 4 days of differentiation, male cells presented a significant increase in expression of DCX, an immature neuronal marker, while female cells showed a significant increase in RMST, a long noncoding RNA, which is indispensable during neurogenesis. In addition, expression of neural markers MAP2, PSD95, SYP, DCX, and TUJ1 at day 14 of differentiation suggested a similar differentiation potential in both lines. The most significant differences at day 14 of differentiation were the expression levels of RELN, with almost 100-fold difference between the sexes, and MASH1, with more than 1,000-fold increase in male cells. To evaluate whether some of the observed differences may be sex related, we measured the expression of gametologous genes located on the X- and Y-chromosome. Most noticeable was the increase of Y-encoded demethylases KDM6C (UTY) and KDM5D during differentiation of male cells. Our results indicate that attention should be paid to sex when planning neurogenesis and transplantation experiments.
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Affiliation(s)
- Philipp Pottmeier
- Department of Organismal Biology, EBC, Uppsala University, Uppsala, Sweden
| | - Olga Doszyn
- Department of Organismal Biology, EBC, Uppsala University, Uppsala, Sweden
| | - Christiane Peuckert
- Department of Organismal Biology, EBC, Uppsala University, Uppsala, Sweden.,Department of Molecular Biology, Stockholm University, Stockholm, Sweden
| | - Elena Jazin
- Department of Organismal Biology, EBC, Uppsala University, Uppsala, Sweden
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Meester I, Manilla-Muñoz E, León-Cachón RBR, Paniagua-Frausto GA, Carrión-Alvarez D, Ruiz-Rodríguez CO, Rodríguez-Rangel X, García-Martínez JM. SeXY chromosomes and the immune system: reflections after a comparative study. Biol Sex Differ 2020; 11:3. [PMID: 31937374 PMCID: PMC6958619 DOI: 10.1186/s13293-019-0278-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/09/2019] [Indexed: 01/27/2023] Open
Abstract
Background Sex bias in immune function has been contributed in part to a preponderance of immune system-related genes (ISRG) on the X-chromosome. We verified whether ISRG are more abundant on the X chromosome as compared to autosomal chromosomes and reflected on the impact of our findings. Methods Consulting freely accessible databases, we performed a comparative study consisting of three complementary strategies. First, among coding X/Y-linked genes, the abundance of ISRG was compared to the abundance of genes dedicated to other systems. Genes were assigned considering three criteria: disease, tissue expression, and function (DEF approach). In addition, we carried out two genome-wide approaches to compare the contribution of sex and autosomal chromosomes to immune genes defined by an elevated expression in lymphatic tissues (LTEEG approach) or annotation to an immune system process, GO:0002376 (GO approach). Results The X chromosome had less immune genes than the median of the autosomal chromosomes. Among X-linked genes, ISRG ranked fourth after the reproductive and nervous systems and genes dedicated to development, proliferation and apoptosis. On the Y chromosome, ISRG ranked second, and at the pseudoautosomal region (PAR) first. According to studies on the expression of X-linked genes in a variety of (mostly non-lymphatic) tissues, almost two-thirds of ISRG are expressed without sex bias, and the remaining ISRG presented female and male bias with similar frequency. Various epigenetic controllers, X-linked MSL3 and Y-linked KDM5D and UTY, were preferentially expressed in leukocytes and deserve further attention for a possible role in sex biased expression or its neutralisation. Conclusions The X chromosome is not enriched for ISRG, though particular X-linked genes may be responsible for sex differences in certain immune responses. So far, there is insufficient information on sex-biased expression of X/Y-linked ISRG in leukocytes to draw general conclusions on the impact of X/Y-linked ISRG in immune function. More research on the regulation of the expression X-linked genes is required with attention to 1) female and male mechanisms that may either augment or diminish sex biased expression and 2) tissue-specific expression studies.
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Affiliation(s)
- Irene Meester
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México.
| | - Edgar Manilla-Muñoz
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México
| | - Rafael B R León-Cachón
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México
| | - Gustavo A Paniagua-Frausto
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México
| | - Diego Carrión-Alvarez
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México
| | - C Orelli Ruiz-Rodríguez
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México
| | - Ximena Rodríguez-Rangel
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México
| | - Joyce M García-Martínez
- Ciencias Básicas, Escuela de Medicina, Universidad de Monterrey, Av. Ignacio Morones Prieto 4500 Pte., 66238, San Pedro Garza García, Nuevo León, México
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Mizukami H, Kim JD, Tabara S, Lu W, Kwon C, Nakashima M, Fukamizu A. KDM5D-mediated H3K4 demethylation is required for sexually dimorphic gene expression in mouse embryonic fibroblasts. J Biochem 2019; 165:335-342. [PMID: 30541083 DOI: 10.1093/jb/mvy106] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 12/10/2018] [Indexed: 11/14/2022] Open
Abstract
Males and females share the same genetic code, but gene expression profile often displays differences between two sexes. Mouse embryonic fibroblasts (MEFs) have been used to experiment as a useful tool to test gene function. They have also been characterized by gender-based differences in expressed genes such as Y-linked Sry or X-linked Hprt. However, there is no report on sex differences in global gene expression. Here, using the next-generation RNA sequencing, we compared the comprehensive transcriptome of MEFs derived from two sexes. In comparison with the female group, the male group up-regulated 27 differentially expressed genes (DEGs), in which a male-specific histone demethylase KDM5D gene is included, and 7 DEGs were down-regulated. Based on the results by searching the ENCODE analysis, it was shown that the expression of 15 genes identified is potentially regulated by the methylation of H3K4me1 or H3K4me3. Interestingly, we demonstrated that both of H3K4 methylation are induced by knocking down KDM5D, which causes changes in patterns of eight DEGs found in male MEFs. Collectively, these data not only suggest an importance of KDM5D-mediated demethylation of H3K4 involved in the sexually dimorphic gene expression in male MEFs, but also may provide information regarding sex-dependent changes in gene expression when MEFs are used for experiments.
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Affiliation(s)
- Hayase Mizukami
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA).,Graduate School of Life and Environmental Sciences
| | - Jun-Dal Kim
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA)
| | | | - Weizhe Lu
- Ph.D. Program in Human Biology, School of Integrative Global Majors (SIGMA)
| | - Chulwon Kwon
- Graduate School of Life and Environmental Sciences
| | | | - Akiyoshi Fukamizu
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA).,International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
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Komura K, Jeong SH, Hinohara K, Qu F, Wang X, Hiraki M, Azuma H, Lee GS, Kantoff PW, Sweeney CJ. Resistance to docetaxel in prostate cancer is associated with androgen receptor activation and loss of KDM5D expression. Proc Natl Acad Sci U S A 2016; 113:6259-64. [PMID: 27185910 DOI: 10.1073/pnas.1600420113] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The androgen receptor (AR) plays an essential role in prostate cancer, and suppression of its signaling with androgen deprivation therapy (ADT) has been the mainstay of treatment for metastatic hormone-sensitive prostate cancer for more than 70 y. Chemotherapy has been reserved for metastatic castration-resistant prostate cancer (mCRPC). The Eastern Cooperative Oncology Group-led trial E3805: ChemoHormonal Therapy Versus Androgen Ablation Randomized Trial for Extensive Disease in Prostate Cancer (CHAARTED) showed that the addition of docetaxel to ADT prolonged overall survival compared with ADT alone in patients with metastatic hormone-sensitive prostate cancer. This finding suggests that there is an interaction between AR signaling activity and docetaxel sensitivity. Here we demonstrate that the prostate cancer cell lines LNCaP and LAPC4 display markedly different sensitivity to docetaxel with AR activation, and RNA-seq analysis of these cell lines identified KDM5D (lysine-specific demethylase 5D) encoded on the Y chromosome as a potential mediator of this sensitivity. Knocking down KDM5D expression in LNCaP leads to docetaxel resistance in the presence of dihydrotestosterone. KDM5D physically interacts with AR in the nucleus, and regulates its transcriptional activity by demethylating H3K4me3 active transcriptional marks. Attenuating KDM5D expression dysregulates AR signaling, resulting in docetaxel insensitivity. KDM5D deletion was also observed in the LNCaP-derived CRPC cell line 104R2, which displayed docetaxel insensitivity with AR activation, unlike parental LNCaP. Dataset analysis from the Oncomine database revealed significantly decreased KDM5D expression in CRPC and poorer prognosis with low KDM5D expression. Taking these data together, this work indicates that KDM5D modulates the AR axis and that this is associated with altered docetaxel sensitivity.
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Jangravi Z, Najafi M, Shabani M. Investigation of Histone Lysine-Specific Demethylase 5D KDM5D) Isoform Expression in Prostate Cancer Cell Lines: a System Approach. Iran Biomed J 2016; 20:117-21. [PMID: 26728332 PMCID: PMC4726892 DOI: 10.7508/ibj.2016.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Background: It is now well-demonstrated that histone demethylases play an important role in developmental controls, cell-fate decisions, and a variety of diseases such as cancer. Lysine-specific demethylase 5D (KDM5D) is a male-specific histone demethylase that specifically demethylates di- and tri-methyl H3K4 at the start site of active gene. In this light, the aim of this study was to investigate isoform/transcript-specific expression profiles of KDM5D in three prostate cancer cell lines, Du-145, LNCaP, and PC3. Methods: Real-time PCR analysis was performed to determine the expression levels of different KDM5D transcripts in the prostate cell lines. A gene regulatory network was established to analyze the gene expression profile. Results: Significantly different expression levels of both isoforms were found among the three cell lines. Interestingly, isoform I was expressed in three cell lines while isoform III did only in DU-145. The expression levels of both isoforms were higher in DU-145 when compared to other cell lines (P<0.0001). The observed expression profile was determined by using regulatory network analyses. Conclusion: The present study, for the first time, not only showed the expression profiles of KDM5D isoforms in prostate cancer cell lines but also evaluated the effects of the gene regulatory network on the expression profile of this gene.
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Affiliation(s)
- Zohreh Jangravi
- Dept. of Biochemistry, Iran University of Medical Sciences, Tehran, Iran.,Dept. of Molecular Systems Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Mohammad Najafi
- Dept. of Biochemistry, Iran University of Medical Sciences, Tehran, Iran.,Dept. of Biochemistry, Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammd Shabani
- Dept. of Biochemistry, Iran University of Medical Sciences, Tehran, Iran
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