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Dutriaux A, Diazzi S, Bresesti C, Hardouin S, Deshayes F, Collignon J, Flagiello D. LADON, a Natural Antisense Transcript of NODAL, Promotes Tumour Progression and Metastasis in Melanoma. Noncoding RNA 2023; 9:71. [PMID: 37987367 PMCID: PMC10661258 DOI: 10.3390/ncrna9060071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/02/2023] [Accepted: 11/10/2023] [Indexed: 11/22/2023] Open
Abstract
The TGFβ family member NODAL, repeatedly required during embryonic development, has also been associated with tumour progression. Our aim was to clarify the controversy surrounding its involvement in melanoma tumour progression. We found that the deletion of the NODAL exon 2 in a metastatic melanoma cell line impairs its ability to form tumours and colonize distant tissues. However, we show that this phenotype does not result from the absence of NODAL, but from a defect in the expression of a natural antisense transcript of NODAL, here called LADON. We show that LADON expression is specifically activated in metastatic melanoma cell lines, that its transcript is packaged in exosomes secreted by melanoma cells, and that, via its differential impact on the expression of oncogenes and tumour suppressors, it promotes the mesenchymal to amoeboid transition that is critical for melanoma cell invasiveness. LADON is, therefore, a new player in the regulatory network governing tumour progression in melanoma and possibly in other types of cancer.
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Affiliation(s)
| | | | | | | | | | - Jérôme Collignon
- Institut Jacques Monod, Université Paris Cité, CNRS, F-75013 Paris, France; (A.D.); (S.D.)
| | - Domenico Flagiello
- Institut Jacques Monod, Université Paris Cité, CNRS, F-75013 Paris, France; (A.D.); (S.D.)
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Kocic G, Hadzi-Djokic J, Colic M, Veljkovic A, Tomovic K, Roumeliotis S, Smelcerovic A, Liakopoulos V. The Role of Nucleases Cleaving TLR3, TLR7/8 and TLR9 Ligands, Dicer RNase and miRNA/piRNA Proteins in Functional Adaptation to the Immune Escape and Xenophagy of Prostate Cancer Tissue. Int J Mol Sci 2022; 24:ijms24010509. [PMID: 36613950 PMCID: PMC9820234 DOI: 10.3390/ijms24010509] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/10/2022] [Accepted: 12/20/2022] [Indexed: 12/29/2022] Open
Abstract
The prototypic sensors for the induction of innate and adaptive immune responses are the Toll-like receptors (TLRs). Unusually high expression of TLRs in prostate carcinoma (PC), associated with less differentiated, more aggressive and more propagating forms of PC, changed the previous paradigm about the role of TLRs strictly in immune defense system. Our data reveal an entirely novel role of nucleic acids-sensing Toll-like receptors (NA-TLRs) in functional adaptation of malignant cells for supply and digestion of surrounding metabolic substrates from dead cells as specific mechanism of cancer cells survival, by corresponding ligands accelerated degradation and purine/pyrimidine salvage pathway. The spectrophotometric measurement protocols used for the determination of the activity of RNases and DNase II have been optimized in our laboratory as well as the enzyme-linked immunosorbent method for the determination of NF-κB p65 in prostate tissue samples. The protocols used to determine Dicer RNase, AGO2, TARBP2 and PIWIL4 were based on enzyme-linked immunosorbent assay. The amount of pre-existing acid-soluble oligonucleotides was measured and expressed as coefficient of absorbance. The activities of acid DNase II and RNase T2, and the activities of nucleases cleaving TLR3, TLR7/8 and TLR9 ligands (Poly I:C, poly U and unmethylated CpG), increased several times in PC, compared to the corresponding tumor adjacent and control tissue, exerting very high sensitivity and specificity of above 90%. Consequently higher levels of hypoxanthine and NF-κB p65 were reported in PC, whereas the opposite results were observed for miRNA biogenesis enzyme (Dicer RNase), miRNA processing protein (TARB2), miRNA-induced silencing complex protein (Argonaute-AGO) and PIWI-interacting RNAs silence transposon. Considering the crucial role of purine and pyrimidine nucleotides as energy carriers, subunits of nucleic acids and nucleotide cofactors, future explorations will be aimed to design novel anti-cancer immune strategies based on a specific acid endolysosomal nuclease inhibition.
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Affiliation(s)
- Gordana Kocic
- Department of Biochemistry, Faculty of Medicine, University of Nis, 18000 Nis, Serbia
- Correspondence: or ; Tel.: +381-63-8122522
| | | | - Miodrag Colic
- Serbian Academy of Sciences and Arts, 11000 Belgrade, Serbia
| | - Andrej Veljkovic
- Department of Biochemistry, Faculty of Medicine, University of Nis, 18000 Nis, Serbia
| | - Katarina Tomovic
- Department of Pharmacy, Faculty of Medicine, University of Nis, 18000 Nis, Serbia
| | - Stefanos Roumeliotis
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece
| | - Andrija Smelcerovic
- Department of Chemistry, Faculty of Medicine, University of Nis, 18000 Nis, Serbia
| | - Vassilios Liakopoulos
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece
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Ashraf MAB, Zahid A, Ashraf S, Waquar S, Iqbal S, Malik A. Implication of Prophetic Variables and their Impulsive Interplay in CA Prostate Patients Experiencing Osteo-Metastasis. Anticancer Agents Med Chem 2021; 20:2106-2113. [PMID: 32718298 DOI: 10.2174/1871520620666200727094430] [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] [Received: 01/08/2020] [Revised: 06/06/2020] [Accepted: 06/11/2020] [Indexed: 12/30/2022]
Abstract
AIMS To identify variables having a critical role in prostate cancer patients experiencing osteometastasis. BACKGROUND Prostatic carcinoma is a multifactorial complex disorder that exhibits an increased propensity to develop bone metastasis. An interplay of inflammatory and bone remodeling parameters promotes the formation of pre-metastatic niches in bones of patients, which could render them more vulnerable to skeletal disabilities. OBJECTIVE To evaluate the multi-dynamic inter-relationship of circulating variables in prostate cancer patients experiencing osteo-metastasis. MATERIALS AND METHODS Fifty-seven (n=57) men with clinically confirmed prostate cancer, fifty-nine (n=59) with skeletal metastases, and one hundred (n=100) healthy subjects i.e., men aging from 53-84 years with no clinical evidence of prostate were recruited from the Jinnah Hospital Lahore, Pakistan. Informed consent was obtained, and a venous blood sample was drawn and stored at -70oC until assayed. Levels of variables were evaluated using appropriate methods. Levels of Matrix Metalloproteinases (MMPs), Osteopontin (OPN), TGH- β, and sRANKL were estimated by the ELISA method. Each sample was suspended and the given protocol was employed. ELISA readings were obtained for the estimation of all variables. RESULTS Highly significant (P˂0.05) differential expression of oxidative stress, inflammatory cytokines, and bone remodeling variables were observed in localized and osteo-metastatic CA prostate patients. A strong positive correlation was revealed among OPN, sRANKL, MMP-7, MMP-9, PSA, and TGF-β (OPN vs. MMP-7, r=0.698* and OPN vs. MMP-9, r=0.765**, OPN vs. RANKL, =0.856*, sRANKL vs. MMP-9, r=0.825**, TGF- β vs. RANKL, r=0.868* and PSA vs. TGF- β, r=0.752*); lower levels of OPG were estimated in metastasized patients, showing that both osteolytic and osteoblastic phases of bone remodeling occur simultaneously. CONCLUSION The altered oxidative and inflammatory responses endorse Matrix Metalloproteinases (MMPs) increased activity, RANKL/OPG imbalance, and enhanced bone matrix proteins turnover, which can foster the process of osteo-metastasis. The perturbed RANKL/OPG drift and enhanced PSA levels are associated with increased TGF-β activity to aggravate Epithelial Mesenchymal transition (EM) and osteo-tropism of prostate cancer. Thus, designing novel targets of these major variables can minimize the incidence of prostate cancer patients.
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Affiliation(s)
- Muhammad A B Ashraf
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Lahore, Pakistan
| | - Ayesha Zahid
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Lahore, Pakistan
| | - Shazia Ashraf
- Department of Pathology, Independent Medical College, Faisalabad, Pakistan
| | - Sulayman Waquar
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Lahore, Pakistan
| | - Saima Iqbal
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Lahore, Pakistan
| | - Arif Malik
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Lahore, Pakistan
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4
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Kirschenbaum A, Izadmehr S, Yao S, O'Connor-Chapman KL, Huang A, Gregoriades EM, Yakar S, Levine AC. Prostatic Acid Phosphatase Alters the RANKL/OPG System and Induces Osteoblastic Prostate Cancer Bone Metastases. Endocrinology 2016; 157:4526-4533. [PMID: 27783536 PMCID: PMC5133341 DOI: 10.1210/en.2016-1606] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Prostate cancer (PCa) is unique in its tendency to produce osteoblastic (OB) bone metastases. There are no existing therapies that specifically target the OB phase that affects 90% of men with bone metastatic disease. Prostatic acid phosphatase (PAP) is secreted by PCa cells in OB metastases and increases OB growth, differentiation, and bone mineralization. The purpose of this study was to investigate whether PAP effects on OB bone metastases are mediated by autocrine and/or paracrine alterations in the receptor activator of nuclear factor κ-B (RANK)/RANK ligand (RANKL)/osteoprotegerin (OPG) system. To investigate whether PAP modulated these factors and altered the bone reaction, we knocked down PAP expression in VCaP cells and stably overexpressed PAP in PC3M cells, both derived from human PCa bone metastases. We show that knockdown of PAP in VCaP cells decreased OPG while increasing RANK/RANKL expression. Forced overexpression of PAP in PC3M cells had the inverse effect, increasing OPG while decreasing RANK/RANKL expression. Coculture of PCa cells with MC3T3 preosteoblasts also revealed a role for secretory PAP in OB-PCa cross talk. Reduced PAP expression in VCaP cells decreased MC3T3 proliferation and differentiation and reduced their OPG expression. PAP overexpression in PC3M cells altered the bone phenotype creating OB rather than osteolytic lesions in vivo using an intratibial model. These findings demonstrate that PAP secreted by PCa cells in OB bone metastases increases OPG and plays a critical role in the vicious cross talk between cancer and bone cells. These data suggest that inhibition of secretory PAP may be an effective strategy for PCa OB bone lesions.
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Affiliation(s)
- Alexander Kirschenbaum
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
| | - Sudeh Izadmehr
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
| | - Shen Yao
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
| | - Kieley L O'Connor-Chapman
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
| | - Alan Huang
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
| | - Elias M Gregoriades
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
| | - Shoshana Yakar
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
| | - Alice C Levine
- Department of Urology (A.K.); Department of Genetics and Genomic Sciences (S.I.), Graduate School of Biomedical Sciences; and Division of Endocrinology, Diabetes and Bone Disease (S.Yao, K.L.O.-C., A.H., E.M.G., A.C.L.), Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York 10029; and Departments of Basic Science and Craniofacial Biology (S.Yak.), New York University College of Dentistry, New York, New York 10010
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5
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Kong HY, Byun J. Emerging roles of human prostatic Acid phosphatase. Biomol Ther (Seoul) 2014; 21:10-20. [PMID: 24009853 PMCID: PMC3762301 DOI: 10.4062/biomolther.2012.095] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 01/10/2013] [Accepted: 01/14/2013] [Indexed: 11/21/2022] Open
Abstract
Prostate cancer is one of the most prevalent non-skin related cancers. It is the second leading cause of cancer deaths among males in most Western countries. If prostate cancer is diagnosed in its early stages, there is a higher probability that it will be completely cured. Prostatic acid phosphatase (PAP) is a non-specific phosphomonoesterase synthesized in prostate epithelial cells and its level proportionally increases with prostate cancer progression. PAP was the biochemical diagnostic mainstay for prostate cancer until the introduction of prostate-specific antigen (PSA) which improved the detection of early-stage prostate cancer and largely displaced PAP. Recently, however, there is a renewed interest in PAP because of its usefulness in prognosticating intermediate to high-risk prostate cancers and its success in the immunotherapy of prostate cancer. Although PAP is believed to be a key regulator of prostate cell growth, its exact role in normal prostate as well as detailed molecular mechanism of PAP regulation is still unclear. Here, many different aspects of PAP in prostate cancer are revisited and its emerging roles in other environment are discussed.
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Affiliation(s)
- Hoon Young Kong
- Department of Molecular Biology, Institute of Nanosensor and Biotechnology, Dankook University, Yongin 448-701, Republic of Korea
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6
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Muniyan S, Chaturvedi NK, Dwyer JG, LaGrange CA, Chaney WG, Lin MF. Human prostatic acid phosphatase: structure, function and regulation. Int J Mol Sci 2013; 14:10438-64. [PMID: 23698773 PMCID: PMC3676848 DOI: 10.3390/ijms140510438] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 05/08/2013] [Accepted: 05/08/2013] [Indexed: 11/16/2022] Open
Abstract
Human prostatic acid phosphatase (PAcP) is a 100 kDa glycoprotein composed of two subunits. Recent advances demonstrate that cellular PAcP (cPAcP) functions as a protein tyrosine phosphatase by dephosphorylating ErbB-2/Neu/HER-2 at the phosphotyrosine residues in prostate cancer (PCa) cells, which results in reduced tumorigenicity. Further, the interaction of cPAcP and ErbB-2 regulates androgen sensitivity of PCa cells. Knockdown of cPAcP expression allows androgen-sensitive PCa cells to develop the castration-resistant phenotype, where cells proliferate under an androgen-reduced condition. Thus, cPAcP has a significant influence on PCa cell growth. Interestingly, promoter analysis suggests that PAcP expression can be regulated by NF-κB, via a novel binding sequence in an androgen-independent manner. Further understanding of PAcP function and regulation of expression will have a significant impact on understanding PCa progression and therapy.
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Affiliation(s)
- Sakthivel Muniyan
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; E-Mails: (S.M.); (N.K.C.); (W.G.C.)
| | - Nagendra K. Chaturvedi
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; E-Mails: (S.M.); (N.K.C.); (W.G.C.)
| | - Jennifer G. Dwyer
- College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; E-Mail:
| | - Chad A. LaGrange
- Department of Surgery/Urology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; E-Mail:
| | - William G. Chaney
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; E-Mails: (S.M.); (N.K.C.); (W.G.C.)
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ming-Fong Lin
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; E-Mails: (S.M.); (N.K.C.); (W.G.C.)
- Department of Surgery/Urology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; E-Mail:
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
- College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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7
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Mueller K, Quandt J, Marienfeld RB, Weihrich P, Fiedler K, Claussnitzer M, Laumen H, Vaeth M, Berberich-Siebelt F, Serfling E, Wirth T, Brunner C. Octamer-dependent transcription in T cells is mediated by NFAT and NF-κB. Nucleic Acids Res 2013; 41:2138-54. [PMID: 23293002 PMCID: PMC3575799 DOI: 10.1093/nar/gks1349] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The transcriptional co-activator BOB.1/OBF.1 was originally identified in B cells and is constitutively expressed throughout B cell development. BOB.1/OBF.1 associates with the transcription factors Oct1 and Oct2, thereby enhancing octamer-dependent transcription. In contrast, in T cells, BOB.1/OBF.1 expression is inducible by treatment of cells with PMA/Ionomycin or by antigen receptor engagement, indicating a marked difference in the regulation of BOB.1/OBF.1 expression in B versus T cells. The molecular mechanisms underlying the differential expression of BOB.1/OBF.1 in T and B cells remain largely unknown. Therefore, the present study focuses on mechanisms controlling the transcriptional regulation of BOB.1/OBF.1 and Oct2 in T cells. We show that both calcineurin- and NF-κB-inhibitors efficiently attenuate the expression of BOB.1/OBF.1 and Oct2 in T cells. In silico analyses of the BOB.1/OBF.1 promoter revealed the presence of previously unappreciated combined NFAT/NF-κB sites. An array of genetic and biochemical analyses illustrates the involvement of the Ca2+/calmodulin-dependent phosphatase calcineurin as well as NFAT and NF-κB transcription factors in the transcriptional regulation of octamer-dependent transcription in T cells. Conclusively, impaired expression of BOB.1/OBF.1 and Oct2 and therefore a hampered octamer-dependent transcription may participate in T cell-mediated immunodeficiency caused by the deletion of NFAT or NF-κB transcription factors.
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Affiliation(s)
- Kerstin Mueller
- Institute of Physiological Chemistry, University Ulm, D-89081 Ulm, Germany, Institute of Pathology, University Ulm, D-89081 Ulm, Germany
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8
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Xu Z, Gao X, He Y, Ju J, Zhang M, Liu R, Wu Y, Ma C, Ma C, Lin Z, Huang X, Zhao Q. Synergistic effect of SRY and its direct target, WDR5, on Sox9 expression. PLoS One 2012; 7:e34327. [PMID: 22523547 PMCID: PMC3327683 DOI: 10.1371/journal.pone.0034327] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Accepted: 02/25/2012] [Indexed: 11/18/2022] Open
Abstract
SRY is a sex-determining gene that encodes a transcription factor, which triggers male development in most mammals. The molecular mechanism of SRY action in testis determination is, however, poorly understood. In this study, we demonstrate that WDR5, which encodes a WD-40 repeat protein, is a direct target of SRY. EMSA experiments and ChIP assays showed that SRY could bind to the WDR5 gene promoter directly. Overexpression of SRY in LNCaP cells significantly increased WDR5 expression concurrent with histone H3K4 methylation on the WDR5 promoter. To specifically address whether SRY contributes to WDR5 regulation, we introduced a 4-hydroxy-tamoxifen-inducible SRY allele into LNCaP cells. Conditional SRY expression triggered enrichment of SRY on the WDR5 promoter resulting in induction of WDR5 transcription. We found that WDR5 was self regulating through a positive feedback loop. WDR5 and SRY interacted and were colocalized in cells. In addition, the interaction of WDR5 with SRY resulted in activation of Sox9 while repressing the expression of β-catenin. These results suggest that, in conjunction with SRY, WDR5 plays an important role in sex determination.
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Affiliation(s)
- Zhen Xu
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
| | - Xinxing Gao
- Model Animal Research Center, Nanjing University, Nanjing, China
| | - Yinghong He
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
- School of Basic Medicine, Dali University, Yunnan, China
| | - Junyi Ju
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
| | - Miaomiao Zhang
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
| | - Ronghua Liu
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
| | - Yupeng Wu
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
| | - Chunyan Ma
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
| | - Chi Ma
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
| | - Zhaoyu Lin
- Model Animal Research Center, Nanjing University, Nanjing, China
| | - Xingxu Huang
- Model Animal Research Center, Nanjing University, Nanjing, China
| | - Quan Zhao
- The State Key Laboratory of Pharmaceutical Biotechnology, Molecular Immunology and Cancer Research Center, School of Life Sciences, Nanjing University, Nanjing, China
- * E-mail:
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9
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John G, Hegarty JP, Yu W, Berg A, Pastor DM, Kelly AA, Wang Y, Poritz LS, Schreiber S, Koltun WA, Lin Z. NKX2-3 variant rs11190140 is associated with IBD and alters binding of NFAT. Mol Genet Metab 2011; 104:174-9. [PMID: 21803625 DOI: 10.1016/j.ymgme.2011.06.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Accepted: 06/29/2011] [Indexed: 12/31/2022]
Abstract
NKX2-3 SNP rs11190140 is associated with inflammatory bowel disease (IBD). The T allele is over-transmitted in IBD and the C allele represents a potential CpG methylation site. We hypothesize that genetic variation and/or methylation of SNP rs11190140 may play a role in NKX2-3 gene expression by affecting transcription factor binding. We studied 233 IBD cases and 250 unrelated healthy individuals from an IBD population from central Pennsylvania and performed genotype analyses of the genetic variation and methylation status analysis using PCR-based RFLP. For transcription factor binding, nuclear extracts from human B cells were incubated with biotin-labeled oligonucleotide sequences of the NKX2-3 promoter region containing the genetic variation of T, non-methylated C or methylated C at rs11190140, followed by biotin pull-down and Western blot analysis for transcription factors SP1, NFAT1, NF-κB, and ETS-1. In case-control analysis, the genetic variation was significantly associated with IBD (OR=0.503, 95% CI=0.330-0.764, p<0.001). Methylation status analyses revealed that the C allele is subject to modification by DNA methylation. transcription factor binding assay indicated distinct differential binding of NFAT1 to the NKX2-3 promoter sequence, with higher binding to those with non-methylated and methylated C than to T. The binding of NFAT1 to the NKX2-3 promoter region with rs1190140 was confirmed by ChIP assay. We speculate that the rs11190140 may regulate NKX2-3 expression and have a role in IBD pathogenesis.
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Affiliation(s)
- Gerrit John
- Department of Surgery, Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA
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Hassan MI, Aijaz A, Ahmad F. Structural and functional analysis of human prostatic acid phosphatase. Expert Rev Anticancer Ther 2010; 10:1055-68. [PMID: 20645695 DOI: 10.1586/era.10.46] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Prostatic acid phosphatase (PAP) is the most abundant phosphatase in human prostate tissue/secretions. It is a clinically important protein for its relevance as a biomarker of prostate carcinoma. Furthermore, it has a potential role in fertilization. We describe here most of the features of PAP including gene regulation, gene/protein structure, functions, its role in tumor progression and evolutionary features. PAP has phosphatase activity and is an extensively studied biomarker of prostate cancer. The major action of PAP is to dephosphorylate macromolecules with the help of catalytic residues (His(12) and Asp(258)) that are located in the cleft between two domains. This article will be of great interest to all those scientists who are working in the area of prostate pathophysiology.
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Affiliation(s)
- Md Imtaiyaz Hassan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
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Heemers HV, Sebo TJ, Debes JD, Regan KM, Raclaw KA, Murphy LM, Hobisch A, Culig Z, Tindall DJ. Androgen deprivation increases p300 expression in prostate cancer cells. Cancer Res 2007; 67:3422-30. [PMID: 17409453 DOI: 10.1158/0008-5472.can-06-2836] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Standard therapy for nonorgan confined prostate cancer aims to block the production or action of androgens. Although initially successful, antiandrogen therapy eventually fails and androgen depletion independent (ADI) disease emerges. Remarkably, ADI prostate cancers still rely on a functional androgen receptor (AR). Aberrant expression of coregulatory proteins required for the formation of productive AR transcriptional complexes is critical for ADI AR activation. Previously, we have shown that the transcriptional coactivator p300 is required for ADI activation of the AR and is up-regulated in prostate cancer, in which its expression is associated with cell proliferation and predicts aggressive tumor features. The mechanism responsible for the deregulated expression of p300, however, remains elusive. Here, we show that p300 expression in prostate cancer cells is subject to androgen regulation. In several prostate cancer model systems, addition of synthetic and natural androgens led to decreased expression of p300 in a time-dependent and dose-dependent manner. Experiments using AR antagonists or small interfering RNA targeting the AR revealed that down-regulation of p300 depends entirely on the presence of a functional AR. It is noteworthy that androgens down-regulated p300 protein expression while leaving messenger levels unaltered. Conversely, both short-term and long-term androgen deprivation resulted in marked up-regulation of p300 expression. The androgen deprivation-induced increase in p300 expression was not affected by the addition of cytokines or growth factors or by cotreatment with antiandrogens. Moreover, increased p300 expression upon androgen starvation is crucial for prostate cancer cell proliferation, as loss of p300 expression severely reduces expression of cyclins governing G(1)-S and G(2)-M cell cycle transition and decreases 5-bromo-2'-deoxyuridine incorporation.
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Affiliation(s)
- Hannelore V Heemers
- Departments of Urology/Biochemistry and Molecular Biology and Laboratory Medicine/Pathology, Mayo Clinic, Rochester, Minnesota, USA
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Armstrong K, Robson CN, Leung HY. NF-kappaB activation upregulates fibroblast growth factor 8 expression in prostate cancer cells. Prostate 2006; 66:1223-34. [PMID: 16683270 DOI: 10.1002/pros.20376] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Fibroblast growth factor 8 (FGF8) is over-expressed in prostate cancer (CaP) correlating with high-grade disease and reduced survival. The role of acetylation in transcriptional regulation of FGF8 was investigated using the histone deacetylase (HDAC) inhibitor Trichostatin A (TSA). METHODS FGF8 transcriptional response to TSA was investigated by gene reporter assays, RT-PCR, and Western blotting. Chromatin immunoprecipitation (ChIP) assays were also performed. RESULTS FGF8 is upregulated in response to TSA treatment along with NF-kappaB transcriptional activity. Over-expression of p65 activated FGF8 transcription. ChIP assays revealed p65 recruitment to the fgf8 promoter, containing putative NF-kappaB binding sites, post TSA stimulation. PI-3K activity is required for TSA mediated FGF8 upregulation. CONCLUSION Using TSA treatment in prostate cancer cells, a requirement of PI-3K activity in mediating TSA function is demonstrated and a novel role for NF-kappaB in the regulation of FGF8 expression is uncovered.
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Affiliation(s)
- Kelly Armstrong
- Urology Research Group, Northern Institute for Cancer Research, University of Newcastle upon Tyne, Medical School, Framlington Place, Newcastle upon Tyne, United Kingdom
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Li S, Bobek LA. Functional analysis of human MUC7 mucin gene 5'-flanking region in lung epithelial cells. Am J Respir Cell Mol Biol 2006; 35:593-601. [PMID: 16778149 PMCID: PMC2643277 DOI: 10.1165/rcmb.2006-0110oc] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The human MUC7 gene encodes a low-molecular-mass mucin glycoprotein that functions in modulation of microbial flora in the oral cavity and respiratory tracts. MUC7 gene expression is tissue- and cell-specific, with dominant expression in salivary gland acinar cells. To begin to understand the molecular mechanisms responsible for controlling MUC7 gene expression, we analyzed the promoter activity of MUC7 5'-flanking region in a human lung epithelial cell line A549. We demonstrated that MUC7 gene is expressed constitutively in this cell line and is upregulated by TNF-alpha stimulation. The promoter activities of a 2,762-bp fragment of the human genomic DNA (-2,732/+30 bp) and its deletion series, subcloned into a luciferase reporter vector, were characterized at the basal level and under stimulation by TNF-alpha. The results indicated that the minimal functional MUC7 promoter is in the region of -138/+30 bp. This region also revealed the greatest increase in the promoter activity upon TNF-alpha stimulation. Two putative AP1-binding elements and one NF-kappaB-binding element were identified within the proximal promoter. Further analyses demonstrated that mutations of these elements dramatically reduced specific DNA-protein binding ability and reporter gene expression. AP1 elements played an essential role in the constitutive expression, while the NF-kappaB element was crucially important in the response to TNF-alpha stimulation, demonstrating that TNF-alpha activates MUC7 transcription via NF-kappaB signaling pathway.
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Affiliation(s)
- Shimin Li
- Department of Oral Biology, University at Buffalo, The State University of New York, 109 Foster Hall, 3435 Main Street, Buffalo, NY 14214, USA
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Cho-Vega JH, Troncoso P, Do KA, Rago C, Wang X, Tsavachidis S, Medeiros LJ, Spurgers K, Logothetis C, McDonnell TJ. Combined laser capture microdissection and serial analysis of gene expression from human tissue samples. Mod Pathol 2005; 18:577-84. [PMID: 15529182 DOI: 10.1038/modpathol.3800327] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Cell-specific gene expression profiling from heterogeneous human tissues is confounded by cell purification limitations. Here, we describe a technique to generate gene expression profiles of pure populations of prostate cancer cells obtained from fresh-frozen prostatectomy specimens and small initial quantities of RNA by combining laser capture microdissection and microserial analysis of gene expression (LCM-microSAGE). Two microSAGE libraries were obtained from approximately 100,000 laser pulses, estimated to contain fewer than 3 x 10(5) cells and 20-30 ng mRNA. Two libraries were sequenced to a depth of 10,111 and 10,463 unique tags from normal and cancer cells, representing 6453 and 6923 genes, respectively. Most transcripts were expressed at similar levels, but cancer cells compared with normal cells had increased expression of 385 tags and decreased expression of 389 tags. A total of 20 genes were differentially expressed (P<0.05); five of these genes were upregulated and 15 were downregulated in cancer cells. Quantitative reverse transcriptase-polymerase chain reaction results from three selected genes corroborated the existence of cell-specific gene expression in LCM-microSAGE-derived libraries. In conclusion, the LCM-microSAGE approach demonstrates that large-scale expression profiles of known and unknown transcripts can be generated from pure populations of target cells obtained from human tissue samples comprised of heterogeneous mixtures of cell types.
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Affiliation(s)
- Jeong Hee Cho-Vega
- Department of Molecular Pathology, The University of Texas, MD Anderson Cancer Center, Houston, TX 77030, USA
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