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Elkin ER, Campbell KA, Lapehn S, Harris SM, Padmanabhan V, Bakulski KM, Paquette AG. Placental single cell transcriptomics: Opportunities for endocrine disrupting chemical toxicology. Mol Cell Endocrinol 2023; 578:112066. [PMID: 37690473 PMCID: PMC10591899 DOI: 10.1016/j.mce.2023.112066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 09/02/2023] [Accepted: 09/05/2023] [Indexed: 09/12/2023]
Abstract
The placenta performs essential biologic functions for fetal development throughout pregnancy. Placental dysfunction is at the root of multiple adverse birth outcomes such as intrauterine growth restriction, preeclampsia, and preterm birth. Exposure to endocrine disrupting chemicals during pregnancy can cause placental dysfunction, and many prior human studies have examined molecular changes in bulk placental tissues. Placenta-specific cell types, including cytotrophoblasts, syncytiotrophoblasts, extravillous trophoblasts, and placental resident macrophage Hofbauer cells play unique roles in placental development, structure, and function. Toxicant-induced changes in relative abundance and/or impairment of these cell types likely contribute to placental pathogenesis. Although gene expression insights gained from bulk placental tissue RNA-sequencing data are useful, their interpretation is limited because bulk analysis can mask the effects of a chemical on individual populations of placental cells. Cutting-edge single cell RNA-sequencing technologies are enabling the investigation of placental cell-type specific responses to endocrine disrupting chemicals. Moreover, in situ bioinformatic cell deconvolution enables the estimation of cell type proportions in bulk placental tissue gene expression data. These emerging technologies have tremendous potential to provide novel mechanistic insights in a complex heterogeneous tissue with implications for toxicant contributions to adverse pregnancy outcomes.
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Affiliation(s)
- Elana R Elkin
- School of Public Health, San Diego State University, San Diego, CA, USA.
| | - Kyle A Campbell
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Samantha Lapehn
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA, USA
| | - Sean M Harris
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Vasantha Padmanabhan
- Department of Pediatrics, Michigan Medicine, Ann Arbor, MI, USA; Department of Obstetrics and Gynecology, Michigan Medicine, Ann Arbor, MI, USA
| | - Kelly M Bakulski
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Alison G Paquette
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA, USA; Department of Pediatrics, University of Washington, Seattle, WA, USA
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2
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Tian F, Lei J, Ni Y, Zhong D, Xie N, Ma J, Wang H, Si S, Wu Y, Jiang T. Regulation of CD18 stability by SIGIRR-modulated ubiquitination: new insights into the relationship between innate immune response and acute lung injury. FEBS J 2022; 290:2721-2743. [PMID: 36527283 DOI: 10.1111/febs.16708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 10/27/2022] [Accepted: 11/03/2022] [Indexed: 12/23/2022]
Abstract
Inappropriate accumulation of alveolar macrophages (AMs) and subsequent excessive production of immune responses play critical roles in the pathogenesis of acute lung injury (ALI), but the core negative regulators governing innate signalling in AMs are ill defined. We have previously shown that single immunoglobin IL-1 receptor-related protein (SIGIRR), a negative regulator of IL-1 receptor and Toll-like receptor signalling, inhibits lipopolysaccharide (LPS)-induced inflammatory responses in AMs. To address the biological relevance of SIGIRR in vivo, we generated a murine ALI model via intratracheal instillation of LPS. Intriguingly, SIGIRR expression was observed to be decreased in resident and recruited macrophages during ALI. This decrease was associated with parallel induction in CD18 protein levels in LPS-challenged lung tissues. Through intranasal injection of SIGIRR lentiviral particles studies, we showed that the overexpression of SIGIRR attenuated recruitment of macrophages and neutrophils, decreased production of inflammatory cytokines and ameliorated pathological changes in lungs. Whilst exploring the basis for this phenotype, SIGIRR was found to be coexpressed with CD18 in AMs, and SIGIRR potentiated the instability of CD18 protein via enhancement of its ubiquitination and proteasome degradation. Conversely, by using CD18-/- mice, we further observed that CD18 deletion completely abolished the therapeutic effects of overexpression of SIGIRR on LPS-induced ALI. Mover, overexpression of CD18 in AMs promoted adhesion to ECM components, enhanced TLR4-mediated inflammasome activation and thereby potentiated IL-1β production. These data collectively identify SIGIRR/CD18 as a key negative regulatory circuit maintaining innate immune homeostasis in AMs along the pathogenesis of ALI.
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Affiliation(s)
- Feng Tian
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Jie Lei
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Yunfeng Ni
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Daixing Zhong
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Nianlin Xie
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Jun Ma
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Haiqiang Wang
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
| | - Shaokui Si
- Department of Respiration, Third Hospital of Baoji, Baoji, China
| | - Yumei Wu
- Department of Pharmacy, Air Force Medical University, Xi'an, China
| | - Tao Jiang
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, China
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Li T, Zheng C, Han WJ, Chen ZZ. Regulation of STUB1 expression and its biological significance in mouse Sertoli cells. Syst Biol Reprod Med 2022; 68:298-313. [PMID: 35343345 DOI: 10.1080/19396368.2022.2027554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
STIP1 Homology and U-Box Containing Protein 1 (STUB1), a ubiquitin E3 ligase initially involved in immune responses, has recently emerged as a pleiotropic regulator of different biological systems, including skeletal and male reproduction systems. On the latter, a homozygous mutation in the STUB1 gene has been identified in patients with hypogonadism. However, the pattern of expression and biological actions of STUB1 in testis remains so far unexplored. Herein, we report analyses on the testicular expression of STUB1 in human testes with impaired spermatogenesis and paracrine regulation of STUB1 expression in mouse testis development and the direct effects of ablation STUB1 on Sertoli cell (SC) functions. STUB1 was expressed abundantly in pachytene spermatocytes and SCs, and weakly in spermatogonia and differentiating spermatids in normal human testis. In contrast, Sertoli-specific expression of STUB1 was significantly decreased in the human testes with impaired spermatogenesis. Throughout postnatal development of mouse testis, however, STUB1 was expressed exclusively in the nuclei of the functionally mature SCs. The adjacent germ cell (GC)-derived IL-1α overtly regulated STUB1 expression through promoting the ETS domain transcription factor Elk-1 (ELK1)-mediated transactivation. Importantly, ablation of endogenous STUB1 caused lipid accumulation and senescence in GC co-incubated SCs. Together with previous reports on the stimulatory effects of IL-1α on cell senescence, our findings suggest that STUB1 may serve as an important negative feedback signaling to modulate the magnitude of GCs-derived IL-1α, which is normally maintained at low levels within testis.
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Affiliation(s)
- Tao Li
- Reproductive Center, Baoji Maternal and Child Health Hospital, Baoji, P. R. China
| | - Chao Zheng
- Department of Urology, Baoji Traditional Chinese Medicine Hospital, Baoji, P. R. China
| | - Wei-Jun Han
- Department of Urology, Baoji Traditional Chinese Medicine Hospital, Baoji, P. R. China
| | - Zhen-Zhen Chen
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, P. R. China.,Department of Human Anatomy, Histology and Embryology, Air Force Military Medical University, Xi'an, P. R. China
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Liu Z, Yuan M, Meng X, Bie H, Yao S. Identification of testicular Foxq1 as a critical modulator of lactate metabolism in mouse Sertoli cells. Histochem Cell Biol 2021; 156:227-237. [PMID: 34091745 DOI: 10.1007/s00418-021-01994-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2021] [Indexed: 01/10/2023]
Abstract
Postmeiotic germ cells require the lactate produced by the adjacent Sertoli cells (SCs) as their sole energy fuels. Lactate production in SCs is elaborately regulated by monitoring the transcription of the lactate dehydrogenase A (Ldha) gene. However, the transcription factors that are responsible for the control of Ldha transcription in SCs remain ill defined. Herein, the expression of forkhead box Q1 (FOXQ1), a central modulator of glucose metabolism in liver, was demonstrated in mouse testis throughout postnatal development, with maximum levels in adult specimens. At this age, FOXQ1 was immunolocalized in the nuclei of the functionally mature SCs. Testicular levels of FOXQ1 were overtly modulated by germ cells (GCs)-derived IL-1α, in a dose- and time-dependent manner. To further clarify the biological functions of FOXQ1, we disrupted the mouse Foxq1 gene using a Cas9/RNA-mediated gene targeting strategy. Foxq1-/- males were subfertile and showed oligoasthenozoospermia due to lactate deficiency. Moreover, we provided the molecular evidence that FOXQ1 may regulate lactate production by directly targeting the transactivation of the Ldha gene in SCs. From a functional standpoint, overexpression of the exogenous Ldha ameliorated Foxq1 deficiency-impaired lactate synthesis in the SCsFoxq1-/- cells. Thus, these findings collectively underscore a reproductive facet of this recently characterized transcription factor, which may operate as a novel transcriptional integrator linking energy homeostasis and nursery function in SCs.
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Affiliation(s)
- Zetao Liu
- Department of Urology, Qingdao No. 3 People's Hospital, Qingdao, 266041, China
| | - Mingyou Yuan
- Department of Pharmacy, Qingdao Municipal Hospital, Qingdao, 266071, China
| | - Xiangxiang Meng
- Department of Clinical Laboratory, Rizhao Hospital of Traditional Chinese Medicine, Rizhao, 276800, China
| | - Haiwen Bie
- Department of Clinical Laboratory, Rizhao Hospital of Traditional Chinese Medicine, Rizhao, 276800, China
| | - Shaobo Yao
- Department of Pathology, Linyi Cancer Hospital, No. 6 Lingyuan East Rd., Linyi, 276034, China.
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Li M, Zhang S, Ma Y, Yang Y, An R. Role of hsa‑miR‑105 during the pathogenesis of paclitaxel resistance and its clinical implication in ovarian cancer. Oncol Rep 2021; 45:84. [PMID: 33846814 PMCID: PMC8025119 DOI: 10.3892/or.2021.8035] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 01/21/2021] [Indexed: 12/17/2022] Open
Abstract
More than 70% of patients with epithelial ovarian cancer (EOC), one of the leading cause of gynecological cancer-related deaths worldwide, are diagnosed at an advanced stage of the disease. Currently, the mainstay for treatment of advanced EOC is tumor debulking surgery followed by combined platinum- and paclitaxel (PTX)-based chemotherapy. However, most patients eventually develop chemoresistance, which remains a major obstacle to successful treatment. Herein, by using clinical specimens and experimentally induced cell models, we found that the expression levels of hsa-miR-105 were significantly decreased in PTX-resistant EOC tissues and cell lines. Follow-up functional experiments demonstrated that repression of hsa-miR-105 conferred resistance to paclitaxel in EOC cells, whereas restoration of hsa-miR-105 expression in situ via intratumoral injection of hsa-miR-105 micrON™ agomir potentiated in vivo sensitivity to PTX and thereafter significantly inhibited tumor growth in a PTX-challenged xenograft model. Mechanistically, hsa-miR-105 exerted its tumor suppressor function by directly inhibiting the zinc and ring finger 2 (ZNRF2) signaling pathway. Importantly, aberrant expression of hsa-miR-105 in both tumor and circulating samples predicted a poor post-chemotherapy prognosis in EOC patients. These findings collectively suggest that hsa-miR-105 may act as a potent tumor suppressor miRNA during the progression of EOC, likely affecting cell proliferation, invasiveness and chemosensitivity to PTX, and functioning at least in part via inhibition of ZNRF2 signaling. The stability and availability and ease in measurement of circulating hsa-miR-105 make it a valuable diagnostic/prognostic biomarker candidate for chemotherapy of EOC.
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Affiliation(s)
- Mao Li
- Department of Obstetrics and Gynecology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Shun Zhang
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Tangdu Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710038, P.R. China
| | - Yuan Ma
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Tangdu Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710038, P.R. China
| | - Yang Yang
- Department of Obstetrics and Gynecology, First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710082, P.R. China
| | - Ruifang An
- Department of Obstetrics and Gynecology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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Peng Y, Chen Y, Chen S, Wang J, Jiang C, Hou W, Xu C. JUND-dependent up-regulation of HMOX1 is associated with cisplatin resistance in muscle-invasive bladder cancer. J Biochem 2021; 168:73-82. [PMID: 32240302 DOI: 10.1093/jb/mvaa027] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 02/16/2020] [Indexed: 02/03/2023] Open
Abstract
The standard-of-care for metastatic muscle-invasive bladder cancer (MIBC) is platinum-based chemotherapy regimens. Acquired resistance that occurs frequently through unidentified mechanisms, however, remains the major obstacle for implementing therapeutic effectiveness. Here, using data mining and analysis on clinical samples, we show that expression of JUND, a core component of activator protein-1 family, was significantly induced in cisplatin (CDDP)-resistant MIBC. Accumulation of nuclear JUND was associated with low post-chemotherapy survival in MIBC patients. In both genetically engineered cell models and murine xenograft models, we provided evidence that bladder cancer (BC) cells with excessive JUND expression were less responsive to CDDP treatment. This CDDP resistance was further demonstrated to be mediated, at least in part, by transactivation of HMOX1 [the gene encoding heme oxygenase-1 (HO-1)], one of the most important antioxidant signalling pathways of cell adaptation to stress. One mutation within the HMOX1 promoter successfully abolished oxidative stress-enhanced and JUND-driven HMOX1 promoter activation, suggesting that this unique site synergized for maximal HO-1 induction in CDDP-challenged BC cells. Overall, our data highlight an indispensible role of JUND, both as a target as a modifier of the oxidative stress signalling, in conferring an adaptive response during the pathogenesis of CDDP resistance in MIBC.
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Affiliation(s)
- Ye Peng
- Department of Orthopaedics, Air Force Medical Center, PLA, No. 30 Fucheng Road, Beijing 100142, China
| | - Yongjie Chen
- Department of Urology, 73rd Group Army Hospital, PLA Army, No. 94 Wenyuan Road, Xia'men 361000, China
| | - Shiwei Chen
- Department of Urology, 73rd Group Army Hospital, PLA Army, No. 94 Wenyuan Road, Xia'men 361000, China
| | - Jiaolian Wang
- Department of Urology, 73rd Group Army Hospital, PLA Army, No. 94 Wenyuan Road, Xia'men 361000, China
| | - Cheng Jiang
- Department of Urology, 73rd Group Army Hospital, PLA Army, No. 94 Wenyuan Road, Xia'men 361000, China
| | - Wugang Hou
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, No. 127 Changle West Road, Xi'an 710032, China
| | - Chun Xu
- Department of Urology, 73rd Group Army Hospital, PLA Army, No. 94 Wenyuan Road, Xia'men 361000, China
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Shi Y, Qi W, Xu Q, Wang Z, Cao X, Zhou L, Ye L. The role of epigenetics in the reproductive toxicity of environmental endocrine disruptors. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2021; 62:78-88. [PMID: 33217042 DOI: 10.1002/em.22414] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 06/11/2023]
Abstract
Environmental endocrine disruptors (EEDs) seriously endanger human health by interfering with the normal function of reproductive systems. In males, EEDs can affect sperm formation and semen quality as well spermatogenesis, ultimately reducing fertility. In females, EEDs can affect uterine development and the expression levels of reproduction-related genes, ultimately reducing female fertility and the normal development of the fetus. There are a large number of putative mechanisms by which EEDs can induce reproductive toxicity, and many studies have shown the involvement of epigenetics. In this review, we summarize the role of DNA methylation, noncoding RNAs, genomic imprinting, chromatin remodeling and histone modification in the reproductive toxicity of EEDs.
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Affiliation(s)
- Yanbin Shi
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
| | - Wen Qi
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
| | - Qi Xu
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
| | - Zheng Wang
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
| | - Xiaolian Cao
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
| | - Liting Zhou
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
| | - Lin Ye
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun, China
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Li N, Li Y, Gao H, Li J, Ma X, Liu X, Gong P, Cui X, Li Y. Forkhead-box A3 (FOXA3) represses cancer stemness and partially potentiates chemosensitivity by targeting metastasis-associated in colon cancer 1 (MACC1) signaling pathway in colorectal cancer cells. Curr Cancer Drug Targets 2020; 21:CCDT-EPUB-112119. [PMID: 33292133 DOI: 10.2174/1568009620666201207150632] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/13/2020] [Accepted: 10/14/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND The major challenge to the treatment of advanced colorectal cancer (CRC) is persistent occurrence of chemoresistance. One of the established etiologies is the existence of cancerstem-like cells (CSCs) using which tumors resist to external therapeutic challenges. OBJECTIVE The forkhead-box A3 (FOXA3) is a potent transcription factor that potentiates the acquisition and maintenance of stemness fate in many physiological systems. However, its effect on cancer stemness, particularly treatment, has not been explored in CRC, forming the basis of the current study. METHODS FOXA3 expression in oxaliplatin-resistant CRC tissues and cells was evaluated using RT-qPCR. Effects of FOXA3 manipulation on sensitivity to oxaliplatin were assessed using WST-1, apoptotic ELISA, colony formation and xenograft model. Effects of FOXA3 alteration on CSCs were determined using tumor sphere assay and CD44 staining. Transcriptional regulation of MACC1 by FOXA3 was studied using ChIP, Co-IP and luciferase reporter assay. RESULTS FOXA3 expression was significantly reduced in tumor samples from oxaliplatin-non-responsive patients compared with that in tumor samples from oxaliplatin-sensitive patients. This downregulation of FOXA3 expression predicted a poor post-chemotherapy overall- or disease-free survival in our 117-patient cohort. FOXA3 down-regulation significantly enhanced cell survival and stem-like properties, thus rendering the CRC cells unresponsiveness to oxaliplatin-induced cell death. Mechanistically, the anti-neoplasic effect of FOXA3 was mediated mainly through transcriptional repression of metastasis-associated in colon cancer 1 (MACC1) in oxaliplatin-resistant CRC cells. CONCLUSION Our findings establish FOXA3 as a potent tumor suppressor in CRC, which may disrupt the maintenance of stemness and modulate sensitivity to oxaliplatin by inhibiting the transcription of MACC1 within CRC cells.
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Affiliation(s)
- Na Li
- Cancer center of Suining Central Hospital, Suining 629000. China
| | - Yun Li
- Department of Medical Oncology, First Affiliated Hospital of Medical College of Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region. China
| | - Hongbo Gao
- Radionuclide Diagnosis and Treatment Center, Beijing Nuclear Industry Hospital, Beijing 100045. China
| | - Jing Li
- Department of Medical Oncology, First Affiliated Hospital of Medical College of Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region. China
| | - Xiaoping Ma
- Department of Medical Oncology, First Affiliated Hospital of Medical College of Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region. China
| | - Xiaomei Liu
- Cancer center of Suining Central Hospital, Suining 629000. China
| | - Ping Gong
- Department of Medical Oncology, First Affiliated Hospital of Medical College of Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region. China
| | - Xiaobin Cui
- Department of Pathology, Medical College of Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region. China
| | - Yong Li
- Department of Radiology, Suining Central Hospital, Suining 629000. China
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Zhang L, Geng Z, Wan Y, Meng F, Meng X, Wang L. Functional analysis of miR-767-5p during the progression of hepatocellular carcinoma and the clinical relevance of its dysregulation. Histochem Cell Biol 2020; 154:231-243. [PMID: 32333091 DOI: 10.1007/s00418-020-01878-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2020] [Indexed: 02/08/2023]
Abstract
Aberrant microRNA (miRNA) expression is a central hallmark of hepatocellular carcinoma (HCC) and identification of the mechanisms underlying the miRNA actions should provide invaluable resource for revealing the molecular basis of different malignant behaviors in HCC. Previous high-throughput analysis has identified miR-767-5p as a unique miRNA signature of HCC, but the biological relevance and corresponding molecular basis of miR-767-5p in HCC is still in its infancy. The current study was, therefore, designed to elucidate whether changes in miR-767-5p expression levels affect HCC pathogenesis, and to further identify the putative targets. miR-767-5p expression was observed to be upregulated by ~ 3.7-fold in surgical HCC specimens as compared to that in adjacent normal hepatic tissues, and this up-regulation trend correlated well to disease progression and predicted a poor prognosis in HCC patients. Functionally, miR-767-5p-overexpressing cells had a significantly higher proliferative, migratory, and invasive potential, and exhibited an enhanced anchorage-dependent clonogenesis and a tumor formation potential in vivo. Mechanistically, PMP22, a core component of integral membrane glycoprotein of peripheral nervous system myelin, was further identified as a direct down-stream target of miR-767-5p in HCC cells. Conversely, stable ectopic expression of PMP22 abrogated the promoting effects of miR-767-5p on HCC aggressive phenotype. Collectively, the available data suggest that as a potent oncomiR, miR-767-5p actions along HCC progression are in part mediated by its function as a posttranscriptional repressor of PMP22 signaling.
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Affiliation(s)
- Lei Zhang
- Department of Geriatric Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 177 Yanta West Road, Xi'an, 710061, China
| | - Zhimin Geng
- Department of Geriatric Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 177 Yanta West Road, Xi'an, 710061, China
| | - Yong Wan
- Department of Geriatric Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 177 Yanta West Road, Xi'an, 710061, China
| | - Fandi Meng
- Department of Geriatric Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 177 Yanta West Road, Xi'an, 710061, China
| | - Xiankui Meng
- Department of Geriatric Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 177 Yanta West Road, Xi'an, 710061, China
| | - Lin Wang
- Department of Geriatric Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, No. 177 Yanta West Road, Xi'an, 710061, China.
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10
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Tang X, Zhou Y, Liu Y, Zhang W, Liu C, Yan C. Potentiation of cancerous progression by LISCH7 via direct stimulation of TGFB1 transcription in triple-negative breast cancer. J Cell Biochem 2020; 121:4642-4653. [PMID: 32048750 DOI: 10.1002/jcb.29679] [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: 04/17/2019] [Accepted: 01/30/2020] [Indexed: 12/15/2022]
Abstract
As an aggressive breast cancer (BCa) subtype, triple-negative breast cancer (TNBC) responses poorly to chemotherapy and endocrine therapy, and usually has a worse prognosis. This is largely due to the lack of specific therapeutic targets, laying claim to an imperious demand to clarify the key signaling pathways potentiating TNBC progression. Herein, we report that expression levels of the liver-specific bHLH-Zip transcription factor (LISCH7), a recently identified key player in cancerous progression, preferentially enriched in TNBC in comparison with other BCa subtypes, and this upregulation was observed to be correlated to a poor survival outcome in patients with TNBC. Ablation of LISCH7 in TNBC cells impaired cell proliferation, reduced cell invasiveness, and enhanced sensitivity to the first-line chemotherapeutic drug docetaxel at both in vitro and in vivo levels. Importantly, concurrent induction of TGFB1, the gene encoding transforming growth factor-β1 (TGF-β1), an essential multipluripotent regulator of TNBC, was accompanied with these alterations in cancerous properties. We further showed that LISCH7 could directly bind to the TGFB1 promoter and stimulate TGFB1 transcription in TNBC cells. The recruitment of LISCH7 onto the TGFB1 chromatin and transactivation of TGFB1 were substantially augmented by treatment with the exogenous TGF-β1 in a time- and dose-dependent manner. Collectively, these findings suggest that LISCH7 and TGF-β1 form a reciprocal positive regulatory loop and cooperatively regulate cancerous progression in TNBC cells. Thus, simultaneous inhibition of both LISCH7 and TGF-β1 signaling may represent a more effective approach to counteract advanced TNBC.
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Affiliation(s)
- Xiaojiang Tang
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yuhui Zhou
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yang Liu
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Wei Zhang
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Chao Liu
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Changyou Yan
- Compositive Sector, Health and Family Planning Commission of Chengcheng County, Weinan, China
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Fu Y, Hu X, Zheng C, Sun G, Xu J, Luo S, Cao P. Intrahippocampal miR-342-3p inhibition reduces β-amyloid plaques and ameliorates learning and memory in Alzheimer's disease. Metab Brain Dis 2019; 34:1355-1363. [PMID: 31134481 DOI: 10.1007/s11011-019-00438-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 05/20/2019] [Indexed: 12/26/2022]
Abstract
Accumulation of extracellular amyloid-β (Aβ) in hippocampal subregions is a hallmark of Alzheimer's disease (AD), which promotes neuronal apoptosis, potentiates cognitive decline and play a causative role in AD pathogenesis. However, whether this process is controlled by distinct miRNAs at the posttranscriptional level remain fascinating but poorly understood. Using post mortem hippocampal samples from human AD patients and 3xTg-AD mouse, we demonstrate that miR-342-3p expression was significantly induced during the AD development. With the aid of intrahippocampal injection of miR-342-3p antagomir, we further show that in vivo miR-342-3p inhibition synergistically improved cognitive deficits in 3xTg-AD mice. The hippocampal Aβ-plaque burden in 3xTg-AD mice, as revealed by immunohistochemical analysis with 4G8 antibody, was attenuated also. Mechanistically, the upregulation of neuronal miR-342-3p is linked to an increase in the activation of the stress kinase c-Jun N-terminal kinase with the subsequent death of the neurons in Aβ-challenged HT22 hippocampal neuronal cells. These findings support the model that derangement of hippocampus signal transduction and subsequent neuronal apoptosis in AD arises as a consequence of increased Aβ burden and chronic activation of the JNK MAPK cascade in a miR-342-3p-dependent manner. Overall, we described for the first time the regulatory activity of miR-342-3p on relevant Aβ metabolism pathways in Alzheimer's disease.
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Affiliation(s)
- Yin Fu
- Heilongjiang University of Chinese Medicine, Harbin, 150040, China
| | - Xiaoyang Hu
- Basic Medical College of Heilongjiang University of Chinese Medicine, Heilongjiang University of Chinese Medicine, Harbin, 150040, China
| | - Chunyu Zheng
- Heilongjiang University of Chinese Medicine, Harbin, 150040, China
| | - Guicai Sun
- Department of Orthopaedics, The Fourth Affiliated Hospital of Nanchang University, Jiangxi, 330003, China
| | - Jianyu Xu
- Department of Radiation Oncology, Tumor Hospital of Harbin Medical University, Harbin, 150000, China
| | - Shanshan Luo
- Department of Pharmacy, No.211 Hospital of PLA, Harbin, 50000, China
| | - Peigang Cao
- Department of Cardiology, General Hospital of Heilongjiang Agricultural Reclamation Bureau, No. 235 Hashuang Road, Harbin, 150088, Heilongjiang Province, China.
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12
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MicroRNA-552 deficiency mediates 5-fluorouracil resistance by targeting SMAD2 signaling in DNA-mismatch-repair-deficient colorectal cancer. Cancer Chemother Pharmacol 2019; 84:427-439. [PMID: 31087138 DOI: 10.1007/s00280-019-03866-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 05/04/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Although DNA-mismatch-repair-deficient (dMMR) status and aberrant expression of miRNAs are both critically implicated in the pathogenesis of resistance to 5-fluorouracil (5-FU) in colorectal cancer (CRC), whether these two factors regulate tumor response to 5-FU in a coordinated manner remains unknown. This study is designed to elucidate whether changes in miR-552 expression levels correlate to 5-FU-based chemoresistance in CRC, and to further identify the putative targets of miR-552 using multiple approaches. METHODS miR-552 expression was assessed in 5-FU-resistant CRC tissues and cells using real-time PCR. Effects of miR-552 dysregulation on 5-FU resistance in CRC cells were determined by measuring cell viability, apoptosis and in vivo oncogenic capacity. Finally, we studied the posttranscriptional regulation of SMAD2 by miR-552 using multiple approaches including luciferase reporter assay, site-directed mutagenesis and transient/stable transfection, at molecular and functional levels. RESULTS Expression of miR-552 was significantly downregulated in 5-FU-resistant CRC tissues and cells, and this downregulation, regulated by dMMR, was associated with poor postchemotherapy prognosis. Functionally, forced expression of miR-552 exhibited a proapoptotic effect and attenuated 5-FU resistance, whereas inhibition of miR-552 expression potentiated 5-FU resistance in CRC cells. Mechanically, miR-552 directly targeted the 3'-UTR of SMAD2, and stable ablation of SMAD2 neutralized the promoting effects of miR-552 deficiency-induced 5-FU resistance. CONCLUSIONS Overall, our findings have revealed a critical role of miR-552/SMAD2 cascade in modulating cellular response to 5-FU chemotherapy. miR-552 may act as an efficient mechanistic link synchronizing dMMR and 5-FU resistance in CRC.
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Wang XH, Yan CY, Liu JR. Hyperinsulinemia-induced KLF5 mediates endothelial angiogenic dysfunction in diabetic endothelial cells. J Mol Histol 2019; 50:239-251. [PMID: 31049798 DOI: 10.1007/s10735-019-09821-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 03/27/2019] [Indexed: 12/15/2022]
Abstract
Reduced expression of endothelial nitric oxide synthase (eNOS) is a hallmark of endothelial dysfunction in diabetes, which predisposes diabetic patients to numerous cardiovascular complications including blunted angiogenesis. The Krüppel-like factor (KLF) five has been implicated as a central regulator of cardiovascular remodeling, but its role in endothelial cells (ECs) remains poorly understood. We show here that expression of endothelial KLF5 was significantly increased in the ECs from mouse diabetes mellitus type 2 (T2DM) model, when compared to non-diabetic or T1DM mouse. KLF5 up-regulation by insulin was dependent on activation of multiple pathways, including mammalian target of rapamycin, oxidative stress and Protein kinase C pathways. Hyperinsulinemia-induced KLF5 inhibited endothelial function and migration, and thereby compromised in vitro and in vivo angiogenesis. Mechanistically, KLF5 acted in concert with the MTA1 coregulator to negatively regulate NOS3 transcription, thereby leading to the diminished eNOS levels in ECs. Conversely, potentiation of cGMP content (the essential downstream effector of eNOS signaling) by pharmacological approaches successfully rescued the endothelial proliferation and in vitro tube formation, in the HUVECs overexpressing the exogenous KLF5. Collectively, the available data suggest that the augmentation of endothelial KLF5 expression by hyperinsulinemia may represent a novel mechanism for negatively regulating eNOS expression, and may thus help to explain for the T2DM-related endothelial dysfunction at the transcriptional level.
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Affiliation(s)
- Xi-Hui Wang
- Department of Cardiology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi, People's Republic of China
| | - Chang-You Yan
- Family Planning Service Stations of Health and Family Planning Commission of Chengcheng County, Chengcheng County, Weinan, 714000, Shaanxi, People's Republic of China
| | - Jian-Rong Liu
- Department of Cardiology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi, People's Republic of China. .,Department of Neurosurgery, The 2nd Affiliated Hospital of Xi'an Medical University, No. 167 Fangdong Road, Baqiao District, Xi'an, 710038, People's Republic of China.
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Jia QP, Yan CY, Zheng XR, Pan X, Cao X, Cao L. Upregulation of MTA1 expression by human papillomavirus infection promotes CDDP resistance in cervical cancer cells via modulation of NF-κB/APOBEC3B cascade. Cancer Chemother Pharmacol 2019; 83:625-637. [PMID: 30631898 DOI: 10.1007/s00280-018-03766-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 12/29/2018] [Indexed: 01/05/2023]
Abstract
OBJECTIVE Compelling evidence establishes the etiological role of viral proteins E6 and E7 of high-risk human papillomaviruses (HPV) in cervical carcinogenesis, but their contribution in chemoresistance that leads to advanced metastatic lesions remains poorly defined. Since metastasis-associated protein 1 (MTA1) upregulation and augmentation of APOBEC3B expression are both strongly associated with cervical cancer (CCa) development, and both molecules have been shown to be functionally associated with NF-κB pathway, we therefore sought to investigate the potential mechanistic link between MTA1, APOBEC3B and NF-κB during the pathogenesis of cisplatin (CDDP) resistance in HPV-positive CCa cells. METHODS MTA1 expression was assessed in HPV-transfected CCa cells using quantitative RT-PCR and immunoblotting. Effects of MTA1 deregulation on CDDP chemosensitivity in CCa cells were determined by measuring cell viability, apoptosis and in vivo oncogenic capacity. Finally, we studied the transcriptional regulation of the antiviral DNA cytosine deaminase APOBEC3B by MTA1 using multiple approaches including DNA deaminase activity assay, luciferase reporter assay, chromatin immunoprecipitation, co-immunoprecipitation and transient/stable transfection, at the molecular and functional levels. RESULTS Expression levels of MTA1 were significantly induced in HPV-positive CCa cells. Transduction experiments showed that the E6 oncoprotein alone was sufficient to cause MTA1 upregulation. Moreover, MTA1 knockdown potentiated CDDP sensitivity in highly metastatic CCa cells. Mechanistically, MTA1 acted as an indirect upstream modulator of APOBEC3B transcription during the pathogenesis of CDDP chemoresistance. HPV-mediated stimulation of APOBEC3B expression was accompanied by the enhanced recruitment of Iκκ α/β and p65 to the NF-κB consensus sites in the APOBEC3B promoter, and this recruitment was substantially abrogated by MTA1 siRNA treatment. CONCLUSIONS These findings reveal an obligatory coregulatory role of MTA1 in the indirect regulation of APOBEC3B expression via classical NF-κB pathway, and also suggest that inhibition of MTA1/NF-κB/APOBEC3B cascade may be repositioned to suppress cancer mutagenesis, dampen tumor evolution, and decrease the probability of adverse outcomes from CDDP resistance in CCa.
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Affiliation(s)
- Qiu-Ping Jia
- Department of Gynaecology and Obstetrics, The 2nd Affiliated Hospital of Xi'an Medical University, No. 167 Fangdong Road, Xi'an, 710038, Shaanxi, People's Republic of China
| | - Chang-You Yan
- Family Planning Service Stations of Health and Family Planning Commission of Chengcheng County, Chengcheng County, Weinan, 714000, Shaanxi, China
| | - Xue-Rong Zheng
- Department of Gynaecology and Obstetrics, The 1st Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi, People's Republic of China
| | - Xia Pan
- Department of Gynaecology and Obstetrics, XD Group Hospital, Xi'an, 710077, Shaanxi, People's Republic of China
| | - Xin Cao
- Department of Gynaecology and Obstetrics, XD Group Hospital, Xi'an, 710077, Shaanxi, People's Republic of China
| | - Lei Cao
- Department of Gynaecology and Obstetrics, The 2nd Affiliated Hospital of Xi'an Medical University, No. 167 Fangdong Road, Xi'an, 710038, Shaanxi, People's Republic of China.
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Xu YY, Yu HR, Sun JY, Zhao Z, Li S, Zhang XF, Liao ZX, Cui MK, Li J, Li C, Zhang Q. Upregulation of PITX2 Promotes Letrozole Resistance Via Transcriptional Activation of IFITM1 Signaling in Breast Cancer Cells. Cancer Res Treat 2019; 51:576-592. [PMID: 30025446 PMCID: PMC6473270 DOI: 10.4143/crt.2018.100] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 07/14/2018] [Indexed: 02/06/2023] Open
Abstract
PURPOSE Although the interferon α (IFNα) signaling and the paired-like homeodomain transcription factor 2 (PITX2) have both been implicated in the progression of breast cancer (BCa), it remains obscure whether these two pathways act in a coordinated manner. We therefore aimed to elucidate the expression and function of PITX2 during the pathogenesis of endocrine resistance in BCa. MATERIALS AND METHODS PITX2 expression was assessed in BCa tissues using quantitative reverse transcription polymerase chain reaction (RT-qPCR) and immunohistochemistry and in experimentally induced letrozole-resistant BCa cells using RT-qPCR and immunoblotting. Effects of PITX2 deregulation on BCa progression was determined by assessing MTT, apoptosis and xenograft model. Finally, using multiple assays, the transcriptional regulation of interferon-inducible transmembrane protein 1 (IFITM1) by PITX2 was studied at both molecular and functional levels. RESULTS PITX2 expression was induced in letrozole-resistant BCa tissues and cells, and PITX2 induction by IFNα signaling powerfully protected BCa cells against letrozole insult and potentiated letrozole-resistance. Mechanistically, PITX2 enhanced IFNα-induced AKT activation by transactivating the transcription of IFITM1, thus rendering BCa cells unresponsive to letrozoleelicited cell death. Additionally, ablation of IFITM1 expression using siRNA substantially abolished IFNα-elicited AKT phosphorylation, even in the presence of PITX2 overexpression, thus sensitizing BCa cells to letrozole treatment. CONCLUSION These results demonstrate that constitutive upregulation of PITX2/IFITM1 cascade is an intrinsic adaptive mechanism during the pathogenesis of letrozole-resistance, and modulation of PITX2/IFITM1 level using different genetic and pharmacological means would thus have a novel therapeutic potential against letrozole resistance in BCa.
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Affiliation(s)
- Ying-ying Xu
- Department of Breast Surgery, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Hai-ru Yu
- Department of Medical Imaging, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Jia-yi Sun
- Department of Medical Imaging, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Zhao Zhao
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Shuang Li
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Xin-feng Zhang
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Zhi-xuan Liao
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Ming-ke Cui
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Juan Li
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Chan Li
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Qiang Zhang
- Department of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, Shenyang, China
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Chai X, Yan J, Gao Y, Jin J. Endothelial HNF4α potentiates angiogenic dysfunction via enhancement of vascular endothelial growth factor resistance in T2DM. J Cell Biochem 2019; 120:12989-13000. [PMID: 30873661 DOI: 10.1002/jcb.28570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/18/2018] [Accepted: 01/02/2019] [Indexed: 12/24/2022]
Abstract
Although both hyperprocoagulant status, characterized by elevated thrombin levels, and vascular endothelial growth factor (VEGF) resistance, marked by attenuated expression of VEGFR2 (also called FLK1 or KDR), are known to contribute importantly to an increased risk of vascular events in diabetes mellitus type 2 (T2DM), it remains obscure whether these two biological events regulate angiogenic response in a coordinated manner. We show here that endothelial expression of hepatocyte nuclear factor 4α (HNF4α) was significantly upregulated in rodents and humans with T2DM, and HNF4α upregulation by thrombin was dependent on activation of multiple pathways, including protein kinase B, c-Jun N-terminal kinase, p38, oxidative stress, protein kinase C, and AMPK (5'-adenosine monophosphate (AMP)-activated protein kinase). Functionally, HNF4α inhibited VEGF-mediated endothelial proliferation and migration, and blunted VEGF-stimulated in vitro angiogenesis, thus rendering endothelial cells unresponsive to established angiogenic VEGF stimulation. Mechanistically, HNF4α potentiated the endothelial VEGF resistance through the direct transcriptional repression of FLK1 gene. From a therapeutic standpoint, overexpression of the exogenous FLK1 successfully rescued HNF4α-inhibited angiogenic response to VEGF and potentiated VEGF-stimulated in vitro tube formation. Considering a strong association between HNF4A deregulation and increased risk of T2DM, our findings suggest that HNF4α may act as a critical converging point linking hyperprocoagulant condition to VEGF resistance in diabetic ECs, and repression of FLK1 expression by thrombin-induced HNF4α mediates, at least partially, the vascular dysfunction caused by T2DM.
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Affiliation(s)
- Xubing Chai
- Department of Endocrinology, Xi'an Institute of Rheumatolog, Xi'an No. 5 Hospital, Xi'an, Shaanxi, China
| | - Jun Yan
- Department of Endocrinology, Xi'an Institute of Rheumatolog, Xi'an No. 5 Hospital, Xi'an, Shaanxi, China
| | - Yaya Gao
- Department of Endocrinology, Xi'an Institute of Rheumatolog, Xi'an No. 5 Hospital, Xi'an, Shaanxi, China
| | - Jing Jin
- Department of Geriatric, Xi'an Institute of Rheumatolog, Xi'an No. 5 Hospital, Xi'an, Shaanxi, China
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17
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Luo XH, Liu JZ, Wang B, Men QL, Ju YQ, Yin FY, Zheng C, Li W. KLF14 potentiates oxidative adaptation via modulating HO-1 signaling in castrate-resistant prostate cancer. Endocr Relat Cancer 2019; 26:181-195. [PMID: 30400002 DOI: 10.1530/erc-18-0383] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Accepted: 09/11/2018] [Indexed: 12/23/2022]
Abstract
Insights into the mechanisms by which key factors stimulate cell growth under androgen-depleted conditions is a premise to the development of effective treatments with clinically significant activity in patients with castration-resistant prostate cancer (CRPC). Herein, we report that, the expression of Krüppel-like factor 14 (KLF14), a master transcription factor in the regulation of lipid metabolism, was significantly induced in castration-insensitive PCa cells and tumor tissues from a mouse xenograft model of CRPC. KLF14 upregulation in PCa cells, which was stimulated upstream by oxidative stress, was dependent on multiple pathways including PI3K/AKT, p42/p44 MAPK, AMPK and PKC pathways. By means of ectopic overexpression and genetic inactivation, we further show that KLF14 promoted cell growth via positive regulation of the antioxidant response under androgen-depleted conditions. Mechanistically, KLF14 coupled to p300 and CBP to enhance the transcriptional activation of HMOX1, the gene encoding the antioxidative enzyme heme oxygenase-1 (HO-1) that is one of the most important mechanisms of cell adaptation to stress. Transient knockdown of HMOX1 is sufficient to overcome KLF14 overexpression-potentiated PCa cell growth under androgen-depleted conditions. From a pharmacological standpoint, in vivo administration of ZnPPIX (a specific inhibitor of HO-1) effectively attenuates castration-resistant progression in the mouse xenograft model, without changing KLF14 level. Together, these results provide comprehensive insight into the KLF14-dependent regulation of antioxidant response and subsequent pathogenesis of castration resistance and indicate that interventions targeting the KLF14/HO-1 adaptive mechanism should be further explored for CRPC treatment.
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Affiliation(s)
- Xiao-Hui Luo
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Jian-Zhou Liu
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Bo Wang
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Qun-Li Men
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Yu-Quan Ju
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Feng-Yan Yin
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Chao Zheng
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Wei Li
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, Shaanxi Province, People's Republic of China
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18
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Liu W, Guo Q, Zhao H. Oxidative stress-elicited YY1 potentiates antioxidative response via enhancement of NRF2-driven transcriptional activity: A potential neuronal defensive mechanism against ischemia/reperfusion cerebral injury. Biomed Pharmacother 2018; 108:698-706. [DOI: 10.1016/j.biopha.2018.09.082] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 09/10/2018] [Accepted: 09/14/2018] [Indexed: 12/21/2022] Open
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19
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Interference with lactate metabolism by mmu-miR-320-3p via negatively regulating GLUT3 signaling in mouse Sertoli cells. Cell Death Dis 2018; 9:964. [PMID: 30237478 PMCID: PMC6148074 DOI: 10.1038/s41419-018-0958-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 08/13/2018] [Accepted: 08/23/2018] [Indexed: 12/30/2022]
Abstract
Disruption of the nursery function in Sertoli cells (SCs) by reducing lactate production, a preferred energy substrate for developed germ cells (spermatocytes and spermatids), is tightly associated with spermatogenic failure such as SC-only syndrome (SCOS). However, whether this complicated pathogenesis is regulated by certain miRNAs at the post-transcriptional level remain fascinating but largely unknown. Here we show for the first time that mmu-miR-320-3p was exclusively expressed in murine SCs and this expression was significantly induced in busulphan-treated murine testis. The most efficient stimulatory germ cell types for the induction of apoptosis-elicited mmu-miR-320-3p expression were meiotic spermatocytes and haploid spermatids. Functionally, forced expression of the exogenous mmu-miR-320-3p in SCs compromises male fertility by causing oligozoospermia and defection of sperm mobility. Mechanistically, mmu-miR-320-3p negatively regulates lactate production of SCs by directly inhibiting glucose transporter 3 (GLUT3) expression. Thus, dysregulation of mmu-miR-320-3p/GLUT3 cascade and consequently of lactate deficiency may be a key molecular event contributing the germ cell loss by SC dysfunction. Future endeavor in the continuous investigation of this important circulating miRNA may shed novel insights into epigenetic regulation of SCs nursery function and the etiology of azoospermia, and offers novel therapeutic and prognostic targets for SCOS.
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Wang J, Zhang B, Jiao Y, Xu Z, Qian B, Wang Q. Involvement of prostatic interstitial cells of Cajal in inflammatory cytokines-elicited catecholamines production: Implications for the pathophysiology of chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS). Biochem Biophys Res Commun 2018; 503:420-427. [DOI: 10.1016/j.bbrc.2018.04.050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 04/07/2018] [Indexed: 12/24/2022]
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21
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Liu H, Wei SP, Zhi LQ, Liu LP, Cao TP, Wang SZ, Chen QP, Liu D. Synovial GATA1 mediates rheumatoid arthritis progression via transcriptional activation of NOS2
signaling. Microbiol Immunol 2018; 62:594-606. [PMID: 29993142 DOI: 10.1111/1348-0421.12637] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 07/05/2018] [Accepted: 07/09/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Huan Liu
- Department of Rheumatology and Immunology; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
| | - Shu-Ping Wei
- Department of Preventive and Health Services; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
| | - Li-Qin Zhi
- Department of Rheumatology and Immunology; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
- Xi'an Institute of Rheumatology; Xi'an 710082 China
| | - Li-Ping Liu
- Department of Rheumatology and Immunology; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
- Xi'an Institute of Rheumatology; Xi'an 710082 China
| | - Tuan-Ping Cao
- Department of Rheumatology and Immunology; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
- Xi'an Institute of Rheumatology; Xi'an 710082 China
| | - Su-Zhi Wang
- Department of Rheumatology and Immunology; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
| | - Qing-Ping Chen
- Department of Rheumatology and Immunology; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
| | - Dan Liu
- Department of Rheumatology and Immunology; Xi'an No. 5 Hospital; 112 XiGuanZhengJie Lian Hu District Xi'an 710082 China
- Xi'an Institute of Rheumatology; Xi'an 710082 China
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miR-34a Regulates Multidrug Resistance via Positively Modulating OAZ2 Signaling in Colon Cancer Cells. J Immunol Res 2018; 2018:7498514. [PMID: 30175154 PMCID: PMC6098920 DOI: 10.1155/2018/7498514] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 06/06/2018] [Accepted: 06/12/2018] [Indexed: 02/06/2023] Open
Abstract
Although aberrant expression of miR-34a, an essential tumor suppressor miRNA, has been frequently observed in colon cancer (CCa), whether miR-34a can regulate CCa progression by modulating other facets of this malignancy (such as multidrug resistance, MDR) remains unknown. Here, we report for the first time that miR-34a expression was significantly downregulated in clinical CCa samples from oxaliplatin-resistant patients and in experimentally established multidrug-resistant CCa cells. By using histoculture drug response assay, we further confirmed that clinical CCa samples with lower miR-34a expression appeared to be more resistant to chemotherapy. Functionally, ectopic expression of exogenous miR-34a resensitized multidrug-resistant HCT-8/OR cells to oxaliplatin treatment, whereas miR-34a inhibition augmented the oxaliplatin resistance in chemosensitive HCT-8 cells. Mechanistically, miR-34a positively regulated the mRNA stability of the ornithine decarboxylase antizyme 2 (OAZ2) by directly targeting its three prime untranslated region (3′UTR). Consequently, suppression of the expression of miR-34a/OAZ2 signaling by chemotherapeutic agents significantly enhanced the activation of MDR-associated ATP-binding cassette (ABC) transporters and antiapoptosis pathways, thus leading to MDR development in CCa cells. Collectively, our combined analysis reveals a critical role of miR-34a/OAZ2 cascade in conferring a proper cellular response to CCa chemotherapy.
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Ni F, Yan CY, Zhou S, Hui PY, Du YH, Zheng L, Yu J, Hu XJ, Zhang ZG. Repression of GRIM19 expression potentiates cisplatin chemoresistance in advanced bladder cancer cells via disrupting ubiquitination-mediated Bcl-xL degradation. Cancer Chemother Pharmacol 2018; 82:593-605. [PMID: 30032449 DOI: 10.1007/s00280-018-3651-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 07/18/2018] [Indexed: 01/24/2023]
Abstract
OBJECTIVE The mainstay of treatment for advanced bladder cancer (BC) is cisplatin (CDDP)-based systematic chemotherapy. However, acquired chemoresistance induced by as yet unidentified mechanisms is encountered frequently and often results in treatment failure and disease progression. The present study was designed to elucidate the expression and potential role of the gene associated with retinoid-interferon-induced mortality-19 (GRIM19) in the pathogenesis of CDDP resistance in BC. METHODS RT-qPCR and immunoblotting were employed to evaluate the expression profile of GRIM19 in clinical BC samples and in different BC cells. Using cell viability assay, apoptotic ELISA, xenografts mouse model, and Transwell assay, the effects of GRIM19 inhibition or GRIM19 overexpression on CDDP resistance were determined in different BC cells. Lastly, using co-immunoprecipitation, we provided the molecular evidence for the interaction between GRIM19 and Bcl-xL. RESULTS Expression levels of GRIM19 were significantly down-regulated in recurrent BC specimens, and in experimentally induced CDDP-resistant BC cells. Functionally, overexpression of the exogenous GRIM19 potentiated CDDP sensitivity and suppressed the survival and invasion of BC cells in the presence of CDDP challenge. Mechanistically, the compromised CDDP chemosensitization induced by GRIM19 loss was at least partially attributed to the attenuation of Bcl-xL polyubiquitination and subsequent degradation, because (1) GRIM19 colocalized with Bcl-xL in the mitochondria of BC cells and (2) GRIM19 overexpression promoted the ubiquitination of Bcl-xL, and this event could be effectively reversed by pretreatment with inhibitors of p38-MAPK and JNK pathways, indicating that GRIM19 overexpression-induced Bcl-xL ubiquitination may achieve in a p38/JNK-dependent manner. Using the UMUC-3 cells stably depleted of endogenous GRIM19, we further show that inhibition of Bcl-xL rectified GRIM19 deficiency-caused CDDP resistance in BC cells. In addition, BCL2L1 mRNA levels were negatively correlated with GRIM19 mRNA levels in CDDP-associated clinical BC tissues. CONCLUSIONS Disruption of GRIM19/Bcl-xL is a key mechanism of CDDP resistance in advanced BC. Therapeutically, enhancement of GRIM19 expression or employment of p38/JNK inhibitors may serve as resensitizing therapies for subgroups of CDDP-resistant or refractory BC patients.
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Affiliation(s)
- Feng Ni
- Department of Urology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi Province, China
| | - Chang-You Yan
- Family Planning Service Stations of Health and Family Planning Commission of Chengcheng County, Chengcheng County, Weinan City, 714000, Shaanxi Province, China
| | - Sheng Zhou
- Department of Anorectal Surgery, The 2nd Affiliated Hospital of Xi'an Medical University, No. 167 Fangdong Street, Baqiao District, Xi'an, 710038, Shaanxi Province, China.
| | - Peng-Yu Hui
- Department of Urology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi Province, China
| | - Yong-Hui Du
- Department of Urology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi Province, China
| | - Liang Zheng
- Department of Urology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi Province, China
| | - Jin Yu
- Department of Urology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi Province, China
| | - Xiao-Jian Hu
- Department of Urology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi Province, China
| | - Zhi-Gang Zhang
- Department of Urology, The 2nd Affiliated Hospital of Xi'an Medical University, Xi'an, 710038, Shaanxi Province, China
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Zheng XR, Pan X, Zhang J, Cao X. Hyperinsulinemia-induced PAX6 expression promotes endometrial epithelial cell proliferation via negatively modulating p27 signaling. Biomed Pharmacother 2018; 97:802-808. [DOI: 10.1016/j.biopha.2017.10.156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/22/2017] [Accepted: 10/26/2017] [Indexed: 12/12/2022] Open
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25
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Qiao GY, Dong BW, Zhu CJ, Yan CY, Chen BL. Deregulation of WNT2/FZD3/β-catenin pathway compromises the estrogen synthesis in cumulus cells from patients with polycystic ovary syndrome. Biochem Biophys Res Commun 2017; 493:847-854. [DOI: 10.1016/j.bbrc.2017.07.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 07/10/2017] [Indexed: 11/17/2022]
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26
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Repression of ESR1 transcription by MYOD potentiates letrozole-resistance in ERα-positive breast cancer cells. Biochem Biophys Res Commun 2017; 492:425-433. [DOI: 10.1016/j.bbrc.2017.08.082] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 08/21/2017] [Indexed: 11/15/2022]
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27
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Zhao Y, Li HX, Wang K, Yan BY, Li W. Regulation of testicular steroidogenesis by Foxa3 via transcriptional modulation of ERα signaling in type 2 diabetes mellitus (T2DM). Biochem Biophys Res Commun 2017. [DOI: 10.1016/j.bbrc.2017.06.118] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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Dong BW, Jin XH, Yan CY, Yang T, Cai GQ, Lu J. Synergistic upregulation of NONO and PSPC1 regulates Sertoli cell response to MEHPviamodulation of ALDH1A1 signaling. FEBS Lett 2017; 591:914-923. [PMID: 28117896 DOI: 10.1002/1873-3468.12568] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/10/2017] [Accepted: 01/18/2017] [Indexed: 01/30/2023]
Affiliation(s)
- Bing-wei Dong
- Department of Pathology; Xian Yang Central Hospital; China
| | - Xiao-hang Jin
- Department of Histology and Embryology; Fourth Military Medical University; Xi'an China
| | | | - Tian Yang
- Department of Histology and Embryology; Fourth Military Medical University; Xi'an China
| | - Guo-qing Cai
- Department of Gynaecology and Obstetrics; Xijing Hospital; Fourth Military Medical University; Xi'an China
| | - Jian Lu
- Department of Pharmacy; Xian Yang Central Hospital; China
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Hao GJ, Hao HJ, Ding YH, Wen H, Li XF, Wang QR, Zhang BB. Suppression of EIF4G2 by miR-379 potentiates the cisplatin chemosensitivity in nonsmall cell lung cancer cells. FEBS Lett 2017; 591:636-645. [PMID: 28117895 DOI: 10.1002/1873-3468.12566] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/10/2017] [Accepted: 01/16/2017] [Indexed: 12/11/2022]
Abstract
Although microRNAs and EIF4G2 are both known to play pivotal roles in cancer progression, it remains unknown whether these pathways regulate chemosensitivity in a coordinated manner. Here, we show that miR-379 expression is significantly downregulated in chemoresistant nonsmall cell lung cancer (NSCLC) tissues and cells. Manipulation of miR-379 levels could alter the in vitro and in vivo cisplatin (CDDP) resistance in lung cancer (LCa) cells. Mechanistically, miR-379 potentiated LCa chemosensitivity via modulation of CDDP-induced apoptosis by directly targeting the EIF4G2 3'UTR. Additionally, we observed an inverse correlation between miR-379 and EIF4G2 expression in LCa tissues from patients with CDDP-based chemotherapy. Together, our findings shed new light on the potential involvement of miR-379/EIF4G2 cascade in the pathogenesis of CDDP resistance in LCa.
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Affiliation(s)
- Guang-Jun Hao
- Department of Oncology, First Hospital of Yulin City, China
| | - Hai-Jun Hao
- Department of Clinical Laboratory, First Hospital of Yulin City, China
| | - Yan-Hui Ding
- Department of Oncology, First Hospital of Yulin City, China
| | - Hui Wen
- Department of Oncology, First Hospital of Yulin City, China
| | - Xiao-Feng Li
- Department of Oncology, First Hospital of Yulin City, China
| | - Qian-Ru Wang
- Department of Oncology, First Hospital of Yulin City, China
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30
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Wu J, Li WZ, Huang ML, Wei HL, Wang T, Fan J, Li NL, Ling R. Regulation of cancerous progression and epithelial-mesenchymal transition by miR-34c-3p via modulation of MAP3K2 signaling in triple-negative breast cancer cells. Biochem Biophys Res Commun 2017; 483:10-16. [PMID: 28069384 DOI: 10.1016/j.bbrc.2017.01.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 01/06/2017] [Indexed: 12/20/2022]
Abstract
Emerging but limited data have evidenced an essential involvement of microRNAs (miRNAs) in the development and progression of triple negative breast cancer (TNBC), which empowers these small regulators as an innovative therapeutic approach, especially for this unique tumor subgroup still lacking an efficient and specific therapeutic target. Herein, we reported the down-regulation of miR-34c-3p level in TNBC tissues, and its expression was closely associated with estrogen receptor alpha (ERα), but not other receptors, in well-characterized breast cancer (BCa) cells. Functionally, ectopic expression of miR-34c-3p inhibited migration, invasion and epithelial-mesenchymal transition (EMT) in TNBC cells. From a mechanistic standpoint, bioinformatics coupled with luciferase and gain-of-function, loss-of-function assays showed that miR-34c-3p may regulate TNBC progression by directly targeting the 3'-untranslated region (UTR) of mitogen-activated protein kinase kinase kinase 2 (MAP3K2). Consistently, MAP3K2 overexpression could effectively rescue miR-34c-3p mimics-induced suppression of cell invasion and EMT. In light of these findings, miR-34c-3p may function as a tumor suppressor in regulating of TNBC invasiveness and EMT through negatively modulating MAP3K2 pathway. Future endeavor in this field may help to identify a novel biomarker to predict prognosis and response to therapy in TNBC.
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Affiliation(s)
- Jiang Wu
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Wei-Zhi Li
- Department of Ultrasound, Xianyang Central Hospital, Xianyang 712000, China
| | - Mei-Ling Huang
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Hong-Liang Wei
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Ting Wang
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Jing Fan
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Nan-Lin Li
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Rui Ling
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China.
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miR-24 suppression of POZ/BTB and AT-hook-containing zinc finger protein 1 (PATZ1) protects endothelial cell from diabetic damage. Biochem Biophys Res Commun 2016; 480:682-689. [DOI: 10.1016/j.bbrc.2016.10.116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 10/12/2016] [Indexed: 12/16/2022]
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32
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Jenardhanan P, Panneerselvam M, Mathur PP. Effect of environmental contaminants on spermatogenesis. Semin Cell Dev Biol 2016; 59:126-140. [DOI: 10.1016/j.semcdb.2016.03.024] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 03/30/2016] [Accepted: 03/31/2016] [Indexed: 11/16/2022]
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33
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Gao ZJ, Min J, Wu XC, Yang T, Yan CY, Dong BH, Zhang T. Repression of neuronal nitric oxide (nNOS) synthesis by MTA1 is involved in oxidative stress-induced neuronal damage. Biochem Biophys Res Commun 2016; 479:40-7. [PMID: 27603575 DOI: 10.1016/j.bbrc.2016.09.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 09/03/2016] [Indexed: 12/14/2022]
Abstract
The Metastasis-associated protein 1 (MTA1) coregulator, an essential component of the nucleosome remodeling and deacetylase (NuRD) complex, potentiates neuroprotective effects against ischemia/reperfusion (I/R) injury. But the underlying mechanism(s) remain largely unknown. Here, we discovered that neuronal MTA1 was a target of oxidative stress, and stimulation of neurons with oxygen glucose deprivation (OGD) treatment significantly inhibited MTA1 expression. Additionally, MTA1 depletion augmented ischemic oxidative stress and thus promoted oxidative stress-induced neuronal cell death by OGD. While studying the impact of MTA1 status on global neuronal gene expression, we unexpectedly discovered that MTA1 may modulate OGD-induced neuronal damage via regulation of distinct nitric oxide synthase (NOS) (namely neuronal NOS, nNOS) signaling. We provided in vitro evidence that NOS1 is a chromatin target of MTA1 in OGD-insulted neurons. Mechanistically, neuronal ischemia-mediated repression of NOS1 expression is accompanied by the enhanced recruitment of MTA1 along with histone deacetylases (HDACs) to the NOS1 promoter, which could be effectively blocked by a pharmacological inhibitor of the HDACs. These findings collectively reveal a previously unrecognized, critical homeostatic role of MTA1, both as a target and as a component of the neuronal oxidative stress, in the regulation of acute neuronal responses against brain I/R damage. Our study also provides a molecular mechanistic explanation for the previously reported neurovascular protection by selective nNOS inhibitors.
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Affiliation(s)
- Zi-Jun Gao
- Department of Anesthesiology, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710054, China
| | - Jie Min
- Department of Ophthalmology, Xi'an No. 4 Hospital, Guangren Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Xu-Cai Wu
- Department of Anesthesiology, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710054, China
| | - Tian Yang
- The 1st Cadet Brigade, Fourth Military Medical University, Xi'an 710032, China
| | - Chang-You Yan
- Xi'an Health Management Service Center, Xi'an 710032, China
| | - Bu-Huai Dong
- Department of Anesthesiology, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710054, China.
| | - Tao Zhang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
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34
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Xu X, Lv YG, Yan CY, Yi J, Ling R. Enforced expression of hsa-miR-125a-3p in breast cancer cells potentiates docetaxel sensitivity via modulation of BRCA1 signaling. Biochem Biophys Res Commun 2016; 479:893-900. [PMID: 27693788 DOI: 10.1016/j.bbrc.2016.09.087] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 09/17/2016] [Indexed: 01/03/2023]
Abstract
Epigenetic gene inactivation by microRNAs (miRNAs) plays a key role in malignant transformation, prevention of apoptosis, drug resistance and metastasis. It has been shown that miR-125a is down-regulated in HER2-amplified and HER2-overexpressing breast cancers (BCa), and this miRNA is believed to serve as an important tumor suppressor. miR-125a has two mature forms: hsa-miR-125a-3p and hsa-miR-125a-5p. However, the functional details of these miRNAs in BCa, particularly during pathogenesis of drug resistance, remain largely unexplored. Herein, we reported that hsa-miR-125a-3p expression was significantly reduced in chemoresistant BCa tissues and in experimentally established chemoresistant BCa cells. hsa-miR-125a-3p knockdown promoted cell proliferation and compromised docetaxel (Dox)-induced cell death, whereas overexpression of hsa-miR-125a-3p attenuated Dox chemoresistance in BCa cells. From a mechanistic standpoint, hsa-miR-125a-3p directly targeted 3'-untranslated regions (3'-UTRs) of breast cancer early onset gene 1 (BRCA1) and inhibits its protein expression via translational repression mechanism. In addition, suppression of BRCA1 expression by siRNA treatment effectively improved hsa-miR-125a-3p deficiency-triggered chemoresistance in BCa cells. Collectively, these findings suggest that hsa-miR-125a-3p may function as a tumor suppressor by regulating the BRCA1 signaling, and reintroduction of hsa-miR-125a-3p analogs could be a potential adjunct therapy for advanced/chemoresistant BCa.
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Affiliation(s)
- Xin Xu
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yong-Gang Lv
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China
| | - Chang-You Yan
- Xi'an Health Management Service Center, Xi'an 710032, Shaanxi Province, China
| | - Jun Yi
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.
| | - Rui Ling
- Department of Thyroid Gland and Breast Vascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, China.
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35
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Chen RA, Sun XM, Yan CY, Liu L, Hao MW, Liu Q, Jiao XY, Liang YM. Hyperglycemia-induced PATZ1 negatively modulates endothelial vasculogenesis via repression of FABP4 signaling. Biochem Biophys Res Commun 2016; 477:548-555. [DOI: 10.1016/j.bbrc.2016.06.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 06/09/2016] [Indexed: 12/11/2022]
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36
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Ning P, Zhong JG, Jiang F, Zhang Y, Zhao J, Tian F, Li W. Role of protein S in castration-resistant prostate cancer-like cells. Endocr Relat Cancer 2016; 23:595-607. [PMID: 27342144 DOI: 10.1530/erc-16-0126] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 06/24/2016] [Indexed: 01/13/2023]
Abstract
Understanding how castration-resistant prostate cancer (CRPC) cells survive the androgen-deprivation condition is crucial for treatment of this advanced prostate cancer (PCa). Here, we reported for the first time the up-regulation of protein S (PROS), an anticoagulant plasma glycoprotein with multiple biological functions, in androgen-insensitive PCa cells and in experimentally induced castration-resistant PCa cells. Overexpression of exogenous PROS in LNCaP cells reduced androgen deprivation-induced apoptosis and enhanced anchorage-dependent clonogenic ability under androgen deprivation condition. Reciprocally, PROS1 knockdown inhibited cell invasiveness and migration, caused the growth inhibition of castration-resistant tumor xenograft under androgen-depleted conditions, and potentiated Taxol (a widely prescribed anti-neoplastic agent)-mediated cell death in PC3 cells. Furthermore, PROS overexpression significantly stimulated AKT activation but failed to evoke oxidative stress in LNCaP cells under normal condition, suggesting that the malignance-promoting effects of the above-mentioned pathway may occur in the order of oxidative stress/PROS/AKT. The potential mechanism may be due to control of oxidative stress-elicited activation of PI3K-AKT-mTOR pathway. Taken together, our gain-of-function, loss-of-function analyses suggest that PROS may facilitate cell proliferation and promote castration resistance in human castration-resistant PCa-like cells via its apoptosis-regulating property. Future study emphasizing on delineating how PROS regulate cellular processes controlling transformation during the development of castration resistance should open new doors for the development of novel therapeutic targets for CRPC.
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Affiliation(s)
- Peng Ning
- Department of Histology and EmbryologyFourth Military Medical University, Xi'an, China Department of Tumor Radiotherapy3rd Hospital of PLA, Bao Ji, China
| | - Jia-Guo Zhong
- Section 2 of Department of Surgery42nd Hospital of PLA, Jiajiang County Leshan City, Sichuan, China
| | - Fan Jiang
- Department of Tumor Radiotherapy3rd Hospital of PLA, Bao Ji, China
| | - Yi Zhang
- Department of Tumor Radiotherapy3rd Hospital of PLA, Bao Ji, China
| | - Jie Zhao
- Department of Histology and EmbryologyFourth Military Medical University, Xi'an, China
| | - Feng Tian
- Department of Thoracic SurgeryTangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Wei Li
- Department of Histology and EmbryologyFourth Military Medical University, Xi'an, China
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Guo J, Zhang T, Yu J, Li HZ, Zhao C, Qiu J, Zhao B, Zhao J, Li W, Zhao TZ. Neuroprotective effects of a chromatin modifier on ischemia/reperfusion neurons: implication of its regulation of BCL2 transactivation by ERα signaling. Cell Tissue Res 2016; 364:475-488. [PMID: 26728277 DOI: 10.1007/s00441-015-2347-9] [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: 07/30/2015] [Accepted: 12/10/2015] [Indexed: 12/26/2022]
Abstract
An understanding of the molecular mechanisms involved in the regulation of estrogen receptor alpha (ERα)-mediated neuroprotective effects is valuable for the development of therapeutic strategy against neuronal ischemic injury. Here, we report the upregulated expression of metastasis-associated protein 1 (MTA1), a master chromatin modifier and transcriptional regulator, in the murine middle cerebral artery occlusion (MCAO) model. Inhibition of MTA1 expression by in vivo short interfering RNA treatment potentiated neuronal apoptosis in a caspase-3-dependent manner and thereafter aggravated MCAO-induced neuronal damage. Mechanistically, the pro-survival effects of MTA1 required the participation of ERα signaling. We also provide in vitro evidence that MTA1 enhances the binding of ERα with the BCL2 promoter upon ischemic insults via recruitment of HDAC2 together with other unidentified coregulators, thus promoting the ERα-mediated transactivation of the BCL2 gene. Collectively, our results suggest that the augmentation of endogenous MTA1 expression during neuronal ischemic injury acts additionally to an endocrinous cascade orchestrating intimate interactions between ERα and BCL2 pathways and operates as an indispensable defensive mechanism in response to neuronal ischemia/reperfusion stress. Future studies in this field will shed light on the modulation of the complicated neuroprotective effects by estrogen signaling.
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Affiliation(s)
- Jun Guo
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Tao Zhang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Jia Yu
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Hong-Zeng Li
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Cong Zhao
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Jing Qiu
- Department of Neurology, General Hospital of Shenyang Military Command, Shenyang, 110015, People's Republic of China
| | - Bo Zhao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Jie Zhao
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Wei Li
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, People's Republic of China.
| | - Tian-Zhi Zhao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China.
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Wang H, Dong BW, Zheng ZH, Wu ZB, Li W, Ding J. Metastasis-associated protein 1 (MTA1) signaling in rheumatoid synovium: Regulation of inflammatory response and cytokine-mediated production of prostaglandin E2 (PGE2). Biochem Biophys Res Commun 2016; 473:442-8. [PMID: 26970310 DOI: 10.1016/j.bbrc.2016.03.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 03/08/2016] [Indexed: 01/13/2023]
Abstract
Abnormal perpetual inflammatory response and sequential cytokine-induced prostaglandin E2 (PGE2) play important roles in the pathogenesis of rheumatoid arthritis (RA). The underlying regulatory mechanism, however, remain largely unknown. Here, we discovered that expression level of Metastasis associated protein 1 (MTA1), an important chromatin modifier that plays a critical role in transcriptional regulation by modifying DNA accessibility for cofactors, was upregulated in human rheumatoid synovial tissues. Furthermore, a knockdown of MTA1 by siRNA in the human fibroblast-like synovial cell line MH7A was found to impair the 4-hydroxynonenal (4-HNE)-induced transcriptional expression levels of certain proinflammatory cytokines including IL-1β, TNF-α and IL-6. Moreover, endogenous MTA1 was required for the cytokines-induced PGE2 synthesis by rheumatoid synoviocytes. Collectively, the coordinated existence of MTA1 inside distinct cascade loops points to its indispensable role in the modulation of the integrated cytokine network along the pathogenesis of RA. Further exploration of the functional details of this master transcriptional regulator should be an attractive strategy to identify novel therapeutic target for RA and warrants execution.
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Affiliation(s)
- Hui Wang
- Department of Medical Psychology, Fourth Military Medical University, Xi'an, 710032, China
| | - Bing-Wei Dong
- Department of Pathology, Xian Yang Central Hospital, Xian Yang, 712000, China
| | - Zhao-Hui Zheng
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Zhen-Biao Wu
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Wei Li
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, China.
| | - Jin Ding
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China.
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Scinicariello F, Feroe AG, Attanasio R. Urinary Phthalates and Leukocyte Telomere Length: An Analysis of NHANES 1999-2002. EBioMedicine 2016; 6:96-102. [PMID: 27211552 PMCID: PMC4856743 DOI: 10.1016/j.ebiom.2016.02.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/21/2016] [Accepted: 02/16/2016] [Indexed: 01/04/2023] Open
Abstract
The International Agency for Research on Cancer classified the di-2-ethylhexyl phthalate (DEHP) as “possibly carcinogenic to humans”. In vitro studies reported that phthalate exposure resulted in induction of several nuclear transcription factors that are activators of telomerase reverse transcriptase (TERT) and telomerase activity of the human telomerase complex. The objective of this study was to determine whether there is an association between urinary phthalate metabolites [mono-ethyl phthalate (MEP), mono-butyl phthalate (MBP), mono-(2-ethyl)-hexyl phthalate (MEHP), and mono-benzyl phthalate (MBzP) and leukocyte telomere length (LTL) in the adult population of the National Health and Nutrition Examination Survey (NHANES) 1999–2002 (n = 2472). After adjustment for potential confounders, participants in the 3rd and 4th quartiles of urinary MEHP had statistically significantly longer LTL (5.34%, 95% CI: 1.31, 9.53; and 7.14%, 95% CI: 2.94, 11.63; respectively) compared to the lowest quartile, with evidence of a dose–response relationship (p-trend = 0.01). The association remained when the analyses were stratified by age groups (20–39 years, 40–59 years, and 60 years and older), and sex. Furthermore, MBP and MBzP were associated with higher LTL in older participants. The age independent association between longer LTL and MEHP (a metabolite of DEHP) might suggest a possible role of MEHP as tumor promoter. NHANES 1999–2002 analysis of phthalate metabolites (MEHP, MEP. MBP, and MBzP) and leukocyte telomere length (LTL) MEHP was associated with longer LTLs evidence of a dose–response relationship. Analyses stratified by age groups, sex and smoking confirmed the association of the MEHP with longer LTL. An association between MBP and MBzP with higher LTL was found in the 60 years and older participants.
Mono-(2-ethyl)-hexyl phthalate (MEHP) is a metabolite of di-2-ethylhexyl phthalate (DEHP) and recently the International Agency for Research on Cancer (IARC) classified DEHP as “possibly carcinogenic to humans” (Group 2B). Also, the National Toxicology Program list DEHP as “reasonably anticipated to be a human carcinogen.” The associations between MEHP and longer leukocyte telomere length (LTL) found in all age groups may potentially suggest a role of this compound as tumor promoter. However, further studies, such as prospective studies, are needed to more fully understand the implications of the findings of this study.
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Affiliation(s)
- Franco Scinicariello
- Division of Toxicology and Human Health Sciences, Agency for Toxic Substances and Disease Registry (ATSDR), Atlanta, GA 30341, USA.
| | - Aliya G Feroe
- Department of Biology, Bowdoin College, Brunswick, ME, USA
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