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Kalinkin AI, Sigin VO, Kuznetsova EB, Ignatova EO, Vinogradov II, Vinogradov MI, Vinogradov IY, Zaletaev DV, Nemtsova MV, Kutsev SI, Tanas AS, Strelnikov VV. Epigenomic Profiling Advises Therapeutic Potential of Leukotriene Receptor Inhibitors for a Subset of Triple-Negative Breast Tumors. Int J Mol Sci 2023; 24:17343. [PMID: 38139172 PMCID: PMC10743620 DOI: 10.3390/ijms242417343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/04/2023] [Accepted: 12/09/2023] [Indexed: 12/24/2023] Open
Abstract
Triple-negative breast cancer (TNBC) is the most aggressive molecular subtype, with a poor survival rate compared to others subtypes. For a long time, chemotherapy was the only systemic treatment for TNBC, and the identification of actionable molecular targets might ultimately improve the prognosis for TNBC patients. We performed a genome-wide analysis of DNA methylation at CpG islands on a collection of one hundred ten breast carcinoma samples and six normal breast tissue samples using reduced representation bisulfite sequencing with the XmaI restriction enzyme (XmaI-RRBS) and identified a subset of TNBC samples with significant hypomethylation at the LTB4R/LTB4R2 genes' CpG islands, including CpG dinucleotides covered with cg12853742 and cg21886367 HumanMethylation 450K microarray probes. Abnormal DNA hypomethylation of this region in TNBC compared to normal samples was confirmed by bisulfite Sanger sequencing. Gene expression generally anticorrelates with promoter methylation, and thus, the promoter hypomethylation detected and confirmed in our study might be revealed as an indirect marker of high LTB4R/LTB4R2 expression using a simple methylation-sensitive PCR test. Analysis of RNA-seq expression and DNA methylation data from the TCGA dataset demonstrates that the expression of the LTB4R and LTB4R2 genes significantly negatively correlates with DNA methylation at both CpG sites cg12853742 (R = -0.4, p = 2.6 × 10-6; R = -0.21, p = 0.015) and cg21886367 (R = -0.45, p = 7.3 × 10-8; R = -0.24, p = 0.005), suggesting the upregulation of these genes in tumors with abnormal hypomethylation of their CpG island. Kaplan-Meier analysis using the TCGA-BRCA gene expression and clinical data revealed poorer overall survival for TNBC patients with an upregulated LTB4R. To this day, only the leukotriene inhibitor LY255283 has been tested on an MCF-7/DOX cell line, which is a luminal A breast cancer molecular subtype. Other studies compare the effects of Montelukast and Zafirlukast (inhibitors of the cysteinyl leukotriene receptor, which is different from LTB4R/LTB4R2) on the MDA-MB-231 (TNBC) cell line, with high methylation and low expression levels of LTB4R. In our study, we assess the therapeutic effects of various drugs (including leukotriene receptor inhibitors) with the DepMap gene effect and drug sensitivity data for TNBC cell lines with hypomethylated and upregulated LTB4R/LTB4R2 genes. LY255283, Minocycline, Silibinin, Piceatannol, Mitiglinide, 1-Azakenpaullone, Carbetocin, and Pim-1-inhibitor-2 can be considered as candidates for the additional treatment of TNBC patients with tumors demonstrating LTB4R/LTB4R2 hypomethylation/upregulation. Finally, our results suggest that the epigenetic status of leukotriene B4 receptors is a novel, potential, predictive, and prognostic biomarker for TNBC. These findings might improve individualized therapy for TNBC patients by introducing new therapeutic adjuncts as anticancer agents.
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Affiliation(s)
- Alexey I. Kalinkin
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
| | - Vladimir O. Sigin
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
| | - Ekaterina B. Kuznetsova
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
- Laboratory of Medical Genetics, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119992 Moscow, Russia
| | - Ekaterina O. Ignatova
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
- Nikolay Nikolaevich Blokhin National Medical Research Center of Oncology, 115478 Moscow, Russia
| | - Ilya I. Vinogradov
- Regional Clinical Oncology Dispensary, 390011 Ryazan, Russia;
- Department of Histology, Pathological Anatomy and Medical Genetics, Ryazan State Medical University, 390026 Ryazan, Russia; (M.I.V.); (I.Y.V.)
| | - Maxim I. Vinogradov
- Department of Histology, Pathological Anatomy and Medical Genetics, Ryazan State Medical University, 390026 Ryazan, Russia; (M.I.V.); (I.Y.V.)
| | - Igor Y. Vinogradov
- Department of Histology, Pathological Anatomy and Medical Genetics, Ryazan State Medical University, 390026 Ryazan, Russia; (M.I.V.); (I.Y.V.)
| | - Dmitry V. Zaletaev
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
| | - Marina V. Nemtsova
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
- Laboratory of Medical Genetics, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119992 Moscow, Russia
| | - Sergey I. Kutsev
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
| | - Alexander S. Tanas
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
| | - Vladimir V. Strelnikov
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (V.O.S.); (E.B.K.); (E.O.I.); (D.V.Z.); (M.V.N.); (S.I.K.); (A.S.T.); (V.V.S.)
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Wang X, Yin G, Zhang W, Song K, Zhang L, Guo Z. Prostaglandin Reductase 1 as a Potential Therapeutic Target for Cancer Therapy. Front Pharmacol 2021; 12:717730. [PMID: 34421612 PMCID: PMC8377670 DOI: 10.3389/fphar.2021.717730] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 07/29/2021] [Indexed: 12/12/2022] Open
Abstract
Altered tumor metabolism is a hallmark of cancer and targeting tumor metabolism has been considered as an attractive strategy for cancer therapy. Prostaglandin Reductase 1 (PTGR1) is a rate-limiting enzyme involved in the arachidonic acid metabolism pathway and mainly responsible for the deactivation of some eicosanoids, including prostaglandins and leukotriene B4. A growing evidence suggested that PTGR1 plays a significant role in cancer and has emerged as a novel target for cancer therapeutics. In this review, we summarize the progress made in recent years toward the understanding of PTGR1 function and structure, highlight the roles of PTGR1 in cancer, and describe potential inhibitors of PTGR1. Finally, we provide some thoughts on future directions that might facilitate the PTGR1 research and therapeutics development.
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Affiliation(s)
- Xing Wang
- Department of Breast and Thyroid Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Center for Novel Target and Therapeutic Intervention, Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Guobing Yin
- Department of Breast and Thyroid Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Zhang
- Center for Novel Target and Therapeutic Intervention, Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Kunlin Song
- Center for Novel Target and Therapeutic Intervention, Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Longbin Zhang
- Center for Novel Target and Therapeutic Intervention, Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Zufeng Guo
- Center for Novel Target and Therapeutic Intervention, Institute of Life Sciences, Chongqing Medical University, Chongqing, China
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Bergmann CB, Hammock BD, Wan D, Gogolla F, Goetzman H, Caldwell CC, Supp DM. TPPU treatment of burned mice dampens inflammation and generation of bioactive DHET which impairs neutrophil function. Sci Rep 2021; 11:16555. [PMID: 34400718 PMCID: PMC8368302 DOI: 10.1038/s41598-021-96014-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/03/2021] [Indexed: 12/20/2022] Open
Abstract
Oxylipins modulate the behavior of immune cells in inflammation. Soluble epoxide hydrolase (sEH) converts anti-inflammatory epoxyeicosatrienoic acid (EET) to dihydroxyeicosatrienoic acid (DHET). An sEH-inhibitor, TPPU, has been demonstrated to ameliorate lipopolysaccharide (LPS)- and sepsis-induced inflammation via EETs. The immunomodulatory role of DHET is not well characterized. We hypothesized that TPPU dampens inflammation and that sEH-derived DHET alters neutrophil functionality in burn induced inflammation. Outbred mice were treated with vehicle, TPPU or 14,15-DHET and immediately subjected to either sham or dorsal scald 28% total body surface area burn injury. After 6 and 24 h, interleukin 6 (IL-6) serum levels and neutrophil activation were analyzed. For in vitro analyses, bone marrow derived neutrophil functionality and mRNA expression were examined. In vivo, 14,15-DHET and IL-6 serum concentrations were decreased after burn injury with TPPU administration. In vitro, 14,15-DHET impaired neutrophil chemotaxis, acidification, CXCR1/CXCR2 expression and reactive oxygen species (ROS) production, the latter independent from p38MAPK and PI3K signaling. We conclude that TPPU administration decreases DHET post-burn. Furthermore, DHET downregulates key neutrophil immune functions and mRNA expression. Altogether, these data reveal that TPPU not only increases anti-inflammatory and inflammation resolving EET levels, but also prevents potential impairment of neutrophils by DHET in trauma.
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Affiliation(s)
- Christian B Bergmann
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Bruce D Hammock
- Department of Entomology, University of California, Davis, CA, USA
| | - Debin Wan
- Department of Entomology, University of California, Davis, CA, USA
| | - Falk Gogolla
- Institute of Bioinformatics, Medical University of Innsbruck, Innsbruck, Austria
| | - Holly Goetzman
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Charles C Caldwell
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Dorothy M Supp
- Division of Plastic, Reconstructive and Hand Surgery/Burn Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA. .,Scientific Staff, Shriners Children's Ohio, Dayton, OH, USA.
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Wu ZH, Tang Y, Zhou Y. DNA Methylation Based Molecular Subtypes Predict Prognosis in Breast Cancer Patients. Cancer Control 2021; 28:1073274820988519. [PMID: 33504182 PMCID: PMC8482718 DOI: 10.1177/1073274820988519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 11/09/2020] [Accepted: 12/28/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Epigenetic changes are tightly linked to tumorigenesis development and malignant transformation' However, DNA methylation occurs earlier and is constant during tumorigenesis. It plays an important role in controlling gene expression in cancer cells. METHODS In this study, we determining the prognostic value of molecular subtypes based on DNA methylation status in breast cancer samples obtained from The Cancer Genome Atlas database (TCGA). RESULTS Seven clusters and 204 corresponding promoter genes were identified based on consensus clustering using 166 CpG sites that significantly influenced survival outcomes. The overall survival (OS) analysis showed a significant prognostic difference among the 7 groups (p<0.05). Finally, a prognostic model was used to estimate the results of patients on the testing set based on the classification findings of a training dataset DNA methylation subgroups. CONCLUSIONS The model was found to be important in the identification of novel biomarkers and could be of help to patients with different breast cancer subtypes when predicting prognosis, clinical diagnosis and management.
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Affiliation(s)
- Zeng-Hong Wu
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yun Tang
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Zhou
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Impaired mammary tumor formation and metastasis by the point mutation of a Smad3 linker phosphorylation site. Biochim Biophys Acta Mol Basis Dis 2018; 1864:3664-3671. [DOI: 10.1016/j.bbadis.2018.08.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 08/08/2018] [Accepted: 08/23/2018] [Indexed: 02/06/2023]
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Kim W, Son B, Lee S, Do H, Youn B. Targeting the enzymes involved in arachidonic acid metabolism to improve radiotherapy. Cancer Metastasis Rev 2018; 37:213-225. [DOI: 10.1007/s10555-018-9742-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Li Q, Gao H, Zhou S, Liao Y. LncRNA PlncRNA-1 overexpression inhibits the growth of breast cancer by upregulating TGF-β1 and downregulating PHGDH. Breast Cancer 2018; 25:619-625. [PMID: 29626321 DOI: 10.1007/s12282-018-0858-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 04/03/2018] [Indexed: 12/31/2022]
Abstract
OBJECTIVE To investigate the role of lncRNA PlncRNA-1 in the pathogenesis of breast cancer. METHODS A total of 78 patients with breast cancer as well as 48 healthy females were included in this study. Expression in tumor tissues and adjacent healthy tissues of breast cancer patients, as well as in breast tissues and serum of both patients and healthy control was detected by qRT-PCR. Cell proliferation was detected by CCK-8 assay, and cell apoptosis was tested by MTT assay. PlncRNA-1 overexpression cell lines were constructed and the effects on TGF-β1 as well as phosphoglycerate dehydrogenase (PHGDH) were explored by western blot. RESULTS Expression levels of PlncRNA-1 were significantly lower in tumor tissues than those in adjacent healthy tissues. Significantly lower expression levels of PlncRNA-1 were also found in breast cancer patients than those in healthy controls in both breast tissue and serum. Upregulation of PlncRNA-1 promoted the expression of TGF-β1, but inhibited the expression of PHGDH. LncRNA PlncRNA-1 overexpression reduced the proliferation rate, but increased the apoptosis rate of breast cancer cells, while treatment with TGF-β inhibitor reduced those effects of PlncRNA-1 overexpression. CONCLUSION LncRNA PlncRNA-1 overexpression inhibits the growth of breast cancer by upregulating TGF-β1 and downregulating PHGDH.
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Affiliation(s)
- Qing Li
- Department of Pathology, The People's Hospital of Dongying, No. 317, South Road, East District, Dongying, 257000, Shandong, China.
| | - Haifeng Gao
- Department of Oncology, The People's Hospital of Dongying, Dongying, 257000, Shandong, China
| | - Shuyan Zhou
- Department of Pathophysiology, Wannan Medical College, Wuhu, 241000, Anhui, China
| | - Yuting Liao
- Department of Pathology, The People's Hospital of Dongguan, Dongguan, 523000, Guangdong, China
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Heme oxygenase-1/carbon monoxide axis suppresses transforming growth factor-β1-induced growth inhibition by increasing ERK1/2-mediated phosphorylation of Smad3 at Thr-179 in human hepatocellular carcinoma cell lines. Biochem Biophys Res Commun 2018. [DOI: 10.1016/j.bbrc.2018.03.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Abstract
The high affinity leukotriene B4 receptor, BLT1 mediates chemotaxis of diverse leukocyte subsets to the sites of infection or inflammation. Whereas the pathological functions of LTB4/BLT1 axis in allergy, autoimmunity and cardiovascular disorders are well established; its role in cancer is only beginning to emerge. In this review, we summarize recent findings on LTB4/BLT1 axis enabling distinct outcomes toward tumor progression. In a mouse lung tumor model promoted by silicosis-induced inflammation, genetic deletion of BLT1 attenuated neutrophilic inflammation and tumor promotion. In contrast, in a spontaneous model of intestinal tumorigenesis, absence of BLT1 led to defective mucosal host response, altered microbiota and bacteria dependent colon tumor progression. Furthermore, BLT1 mediated CD8+ T cell recruitment was shown to be essential for initiating anti-tumor immunity in number of xenograft models and is critical for effective PD1 based immunotherapy. BLT2 mediated chemotherapy resistance, tumor promotion and metastasis are also discussed. This new information points to a paradigm shift in our understanding of the LTB4 pathways in cancer.
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Sommakia S, Baker OJ. Regulation of inflammation by lipid mediators in oral diseases. Oral Dis 2017; 23:576-597. [PMID: 27426637 PMCID: PMC5243936 DOI: 10.1111/odi.12544] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 07/08/2016] [Accepted: 07/13/2016] [Indexed: 02/06/2023]
Abstract
Lipid mediators (LM) of inflammation are a class of compounds derived from ω-3 and ω-6 fatty acids that play a wide role in modulating inflammatory responses. Some LM possess pro-inflammatory properties, while others possess proresolving characteristics, and the class switch from pro-inflammatory to proresolving is crucial for tissue homeostasis. In this article, we review the major classes of LM, focusing on their biosynthesis and signaling pathways, and their role in systemic and, especially, oral health and disease. We discuss the detection of these LM in various body fluids, focusing on diagnostic and therapeutic applications. We also present data showing gender-related differences in salivary LM levels in healthy controls, leading to a hypothesis on the etiology of inflammatory diseases, particularly Sjögren's syndrome. We conclude by enumerating open areas of research where further investigation of LM is likely to result in therapeutic and diagnostic advances.
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Affiliation(s)
- Salah Sommakia
- School of Dentistry, The University of Utah, Salt Lake City, UT, USA
| | - Olga J. Baker
- School of Dentistry, The University of Utah, Salt Lake City, UT, USA
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Roberts LS, Yan P, Bateman LA, Nomura DK. Mapping Novel Metabolic Nodes Targeted by Anti-Cancer Drugs that Impair Triple-Negative Breast Cancer Pathogenicity. ACS Chem Biol 2017; 12:1133-1140. [PMID: 28248089 DOI: 10.1021/acschembio.6b01159] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Triple-negative breast cancers (TNBCs) are estrogen receptor, progesterone receptor, and HER2 receptor-negative subtypes of breast cancers that show the worst prognoses and lack targeted therapies. Here, we have coupled the screening of ∼400 anticancer agents that are under development or in the clinic with chemoproteomic and metabolomic profiling to identify novel metabolic mechanisms for agents that impair TNBC pathogenicity. We identify 20 anticancer compounds that significantly impaired cell survival across multiple types of TNBC cells. Among these 20 leads, the phytoestrogenic natural product licochalcone A was of interest, since TNBCs are unresponsive to estrogenic therapies, indicating that licochalcone A was likely acting through another target. Using chemoproteomic profiling approaches, we reveal that licochalcone A impairs TNBC pathogenicity, not through modulating estrogen receptor activity but rather through inhibiting prostaglandin reductase 1, a metabolic enzyme involved in leukotriene B4 inactivation. We also more broadly performed metabolomic profiling to map additional metabolic mechanisms of compounds that impair TNBC pathogenicity. Overlaying lipidomic profiling with drug responses, we find that deubiquitinase inhibitors cause dramatic elevations in acyl carnitine levels, which impair mitochondrial respiration and contribute to TNBC pathogenic impairments. We thus put forth two unique metabolic nodes that are targeted by drugs or drug candidates that impair TNBC pathogenicity. Our results also showcase the utility of coupling drug screens with chemoproteomic and metabolomic profiling to uncover unique metabolic drivers of TNBC pathogenicity.
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Affiliation(s)
- Lindsay S. Roberts
- Departments of Chemistry, Molecular and
Cell Biology, and Nutritional Sciences and Toxicology, 127 Morgan Hall, University of California, Berkeley, Berkeley, California 94720, United States
| | - Peter Yan
- Departments of Chemistry, Molecular and
Cell Biology, and Nutritional Sciences and Toxicology, 127 Morgan Hall, University of California, Berkeley, Berkeley, California 94720, United States
| | - Leslie A. Bateman
- Departments of Chemistry, Molecular and
Cell Biology, and Nutritional Sciences and Toxicology, 127 Morgan Hall, University of California, Berkeley, Berkeley, California 94720, United States
| | - Daniel K. Nomura
- Departments of Chemistry, Molecular and
Cell Biology, and Nutritional Sciences and Toxicology, 127 Morgan Hall, University of California, Berkeley, Berkeley, California 94720, United States
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Park SJ, Yang SW, Kim BC. Transforming growth factor-β1 induces cell cycle arrest by activating atypical cyclin-dependent kinase 5 through up-regulation of Smad3-dependent p35 expression in human MCF10A mammary epithelial cells. Biochem Biophys Res Commun 2016; 472:502-7. [PMID: 26966064 DOI: 10.1016/j.bbrc.2016.02.121] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 02/29/2016] [Indexed: 12/22/2022]
Abstract
Cyclin-dependent kinases (Cdks) play important roles in control of cell division. Cdk5 is an atypical member of Cdk family with non-cyclin-like regulatory subunit, p35, but its role in cell cycle progression is still unclear. In the present study, we investigated the role of Cdk5/p35 on transforming growth factor-β1 (TGF-β1)-induced cell cycle arrest. In human MCF10A mammary epithelial cells, TGF-β1 induced cell cycle arrest at G1 phase and increased p27KIP1 expression. Interestingly, pretreatment with roscovitine, an inhibitor of Cdk5, or transfection with small interfering (si) RNAs specific to Cdk5 and p35 significantly attenuated the TGF-β1-induced p27KIP1 expression and cell cycle arrest. TGF-β1 increased Cdk5 activity via up-regulation of p35 gene at transcriptional level, and these effects were abolished by transfection with Smad3 siRNA or infection of adenovirus carrying Smad3 mutant at the C-tail (3SA). Chromatin immunoprecipitation assay further revealed that wild type Smad3, but not mutant Smad3 (3SA), binds to the region of the p35 promoter region (-1000--755) in a TGF-β1-dependent manner. These results for the first time demonstrate a role of Cdk5/p35 in the regulation of cell cycle progression modulated by TGF-β1.
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Affiliation(s)
- Seong Ji Park
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon 200-701, South Korea
| | - Sun Woo Yang
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon 200-701, South Korea
| | - Byung-Chul Kim
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon 200-701, South Korea.
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