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Asare A, Yao H, Lara OD, Wang Y, Zhang L, Sood AK. Race-associated molecular changes in gynecologic malignancies. CANCER RESEARCH COMMUNICATIONS 2022; 2:99-109. [PMID: 35992327 PMCID: PMC9390975 DOI: 10.1158/2767-9764.crc-21-0018] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The difference in cancer morbidity and mortality between individuals of different racial groups is complex. Health disparities provide a framework to explore potential connections between poor outcomes and individuals of different racial backgrounds. This study identifies genomic changes in African-American patients with gynecologic malignancies, a population with well-established disparities in outcomes. Our data explore whether social health disparities might mediate interactions between the environment and tumor epigenomes and genomes that can be identified. Using The Cancer Genetic Ancestry Atlas, which encodes data from The Cancer Genome Atlas by ancestry and allows for systematic analyses of sequencing data by racial group, we performed large-scale, comparative analyses to identify novel targets with alterations in methylation, transcript, and microRNA expression between tumors from women of European American or African American racial groups across all gynecologic malignancies. We identify novel discrete genomic changes in these complex malignancies and suggest a framework for identifying novel therapeutic targets for future investigation.
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Affiliation(s)
- Amma Asare
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
| | - Hui Yao
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Olivia D. Lara
- Department of Obstetrics and Gynecology, NYU Langone Health, New York
| | - Ying Wang
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Lin Zhang
- Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Anil K. Sood
- Center for RNA Interference and Non-Coding RNA, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Corresponding Author: Anil K. Sood, Department of Gynecologic Oncology and Reproductive Medicine, Unit 1362, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030. Phone: 713-745-5266; E-mail:
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Zou R, Loke SY, Tang YC, Too HP, Zhou L, Lee ASG, Hartman M. Development and validation of a circulating microRNA panel for the early detection of breast cancer. Br J Cancer 2022; 126:472-481. [PMID: 35013577 PMCID: PMC8810862 DOI: 10.1038/s41416-021-01593-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 08/05/2021] [Accepted: 10/06/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Mammography is widely used for breast cancer screening but suffers from a high false-positive rate. Here, we perform the largest comprehensive, multi-center study to date involving diverse ethnic groups, for the identification of circulating miRNAs for breast cancer screening. METHODS This study had a discovery phase (n = 289) and two validation phases (n = 374 and n = 379). Quantitative PCR profiling of 324 miRNAs was performed on serum samples from breast cancer (all stages) and healthy subjects to identify miRNA biomarkers. Two-fold cross-validation was used for building and optimising breast cancer-associated miRNA panels. An optimal panel was validated in cohorts with Caucasian and Asian samples. Diagnostic ability was evaluated using area under the curve (AUC) analysis. RESULTS The study identified and validated 30 miRNAs dysregulated in breast cancer. An optimised eight-miRNA panel showed consistent performance in all cohorts and was successfully validated with AUC, accuracy, sensitivity, and specificity of 0.915, 82.3%, 72.2% and 91.5%, respectively. The prediction model detected breast cancer in both Caucasian and Asian populations with AUCs ranging from 0.880 to 0.973, including pre-malignant lesions (stage 0; AUC of 0.831) and early-stage (stages I-II) cancers (AUC of 0.916). CONCLUSIONS Our panel can potentially be used for breast cancer screening, in conjunction with mammography.
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Affiliation(s)
- Ruiyang Zou
- Department of Research and Development, MiRXES Lab, Singapore, Singapore
| | - Sau Yeen Loke
- Cellular and Molecular Research, Humphrey Oei Institute of Cancer Research, National Cancer Centre, Singapore, Singapore
| | - Yew Chung Tang
- Department of Research and Development, MiRXES Lab, Singapore, Singapore
| | - Heng-Phon Too
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Center for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Lihan Zhou
- Department of Research and Development, MiRXES Lab, Singapore, Singapore.
| | - Ann S G Lee
- Cellular and Molecular Research, Humphrey Oei Institute of Cancer Research, National Cancer Centre, Singapore, Singapore.
- SingHealth Duke-NUS Oncology Academic Clinical Programme, Duke-NUS Medical School, Singapore, Singapore.
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
| | - Mikael Hartman
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
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Metabotropic Glutamate Receptor 8 Is Regulated by miR-33a-5p and Functions as an Oncogene in Breast Cancer. JOURNAL OF ONCOLOGY 2021; 2021:8002087. [PMID: 34950209 PMCID: PMC8691986 DOI: 10.1155/2021/8002087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 01/24/2023]
Abstract
It has been reported that glutamate metabotropic receptor 8 (GRM8) is closely implicated in the progression of human neuroblastoma, lung cancer, and glioma, but its role in breast cancer remains unknown. Thus, the present study was performed to uncover it. Immunohistochemistry, real-time PCR (RT-PCR), and western blotting experiments were performed to test GRM8 expression levels in tissues and cells. Cell functions were assessed by Cell Count Kit 8 (CCK-8), flow cytometry, wound healing, transwell chambers, and in vivo xenotransplantation experiments. The relationship between miR-33a-5p and GRM8 was evaluated by luciferase gene reporter and western blotting assay. The results showed that GRM8 expression was increased in breast cancer tissues and cells, which was closely associated with lower overall survival rate. Ectopic expression of GRM8 significantly enhanced cell growth, migration, and invasion and tumorigenesis and repressed cell apoptosis. In addition, GRM8 was under the negative regulation of miR-33a-5p, which was downregulated in breast cancer tissues and served as a tumor suppressor. Moreover, overexpression of GRM8 abrogated the inhibitive role of miR-33a-5p played in breast cancer. Collectively, this study reveals that GRM8 functions as an oncogene in breast cancer and is regulated by miR-33a-5p.
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Zhang Y, Lu W, Chen Y, Lin Y, Yang X, Wang H, Liu Z. The miR-19b-3p-MAP2K3-STAT3 feedback loop regulates cell proliferation and invasion in esophageal squamous cell carcinoma. Mol Oncol 2021; 15:1566-1583. [PMID: 33660414 PMCID: PMC8096789 DOI: 10.1002/1878-0261.12934] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 01/22/2021] [Accepted: 02/26/2021] [Indexed: 02/05/2023] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most refractory malignancies worldwide. Mitogen-activated protein kinase 3 (MAP2K3) has a contradictory role in tumor progression, and the function and expression patterns of MAP2K3 in ESCC remain to be determined. We found that MAP2K3 expression to be downregulated in ESCC, and MAP2K3 downregulation correlated with clinically poor survival. MAP2K3 inhibited ESCC cell proliferation and invasion in vitro and in vivo. MAP2K3 suppressed STAT3 expression and activation. Mechanistically, MAPSK3 interacted with MDM2 to promote STAT3 degradation via the ubiquitin-proteasome pathway. Furthermore, exosomal miR-19b-3p derived from the plasma of patients with ESCC could suppress MAP2K3 expression to promote ESCC tumorigenesis. STAT3 was found to bind to the MIR19B promoter and increased the expression of miR-19b-3p in ESCC cells. In summary, our results demonstrated that the miR-19b-3p-MAP2K3-STAT3 feedback loop regulates ESCC tumorigenesis and elucidates the potential of therapeutically targeting this pathway in ESCC.
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Affiliation(s)
- Ying Zhang
- Department of PathologySun Yat‐Sen University Cancer CenterGuangzhouChina
- Sun Yat‐Sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhouChina
| | - Weiqing Lu
- Department of OrthopaedicsFirst Affiliated Hospital of Shantou University Medical CollegeShantouChina
| | - Yelong Chen
- Department of OrthopaedicsFirst Affiliated Hospital of Shantou University Medical CollegeShantouChina
| | - Youbin Lin
- Department of OrthopaedicsFirst Affiliated Hospital of Shantou University Medical CollegeShantouChina
| | - Xia Yang
- Sun Yat‐Sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhouChina
| | - Hu Wang
- Department of OrthopaedicsFirst Affiliated Hospital of Shantou University Medical CollegeShantouChina
| | - Zhaoyong Liu
- Department of OrthopaedicsFirst Affiliated Hospital of Shantou University Medical CollegeShantouChina
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Expression of Estrogen Receptor- and Progesterone Receptor-Regulating MicroRNAs in Breast Cancer. Genes (Basel) 2021; 12:genes12040582. [PMID: 33923732 PMCID: PMC8073827 DOI: 10.3390/genes12040582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 12/17/2022] Open
Abstract
In ~70% of breast cancer (BC) cases, estrogen and progesterone receptors (ER and PR) are overexpressed, which can change during tumor progression. Expression changes of these receptors during cancer initiation and progression can be caused by alterations in microRNA (miR, miRNA) expression. To assess the association of BC progression with aberrant expression of miRNAs that target ER and PR mRNAs, we quantified miR-19b, -222, -22, -378a, and -181a in BC samples (n = 174) by real-time PCR. Underexpression of miR-222 and miR-378a in stage T2–T4 BC was characteristic for HER2-overexpressing tumors. In addition, the expression of miR-181a and miR-378a was higher in these tumors than in tumors with a HER2 IHC score of 0 or 1+. In tumors with a Ki-67 index ≥ 14%, all tested miRNAs were underexpressed in BC with a high Allred PR score (6–8). In ER-and-PR–negative tumors, miR-22, miR-222, miR-181a, and miR-378a underexpression was associated with Ki-67 index > 35% (median value). MiR-19b and miR-22 underexpression could be a marker of lymph node metastasis in ER- and/or PR-positive tumors with HER2 IHC score 0. Thus, the association of miR-19b, miR-22, miR-222, miR-378a, and miR-181a levels with BC characteristics is influenced by the status of tumor ER, PR, HER2, and Ki-67.
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Liu H, Shi C, Deng Y. MALAT1 affects hypoxia-induced vascular endothelial cell injury and autophagy by regulating miR-19b-3p/HIF-1α axis. Mol Cell Biochem 2020; 466:25-34. [PMID: 31933110 DOI: 10.1007/s11010-020-03684-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 01/04/2020] [Indexed: 12/13/2022]
Abstract
Cardiovascular disease has become the leading cause of death in the world. Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) plays an important role in cardiovascular disease, such as stroke. However, the role of MALAT1 in hypoxia (HYP)-induced vascular endothelial cells (VECs) remains unclear. In the present study, HYP-treated human umbilical vein endothelial cells (HUVECs) were utilized to simulate HYP-induced VEC injury. It was found that after HYP treatment, the levels of MALAT1 and hypoxia-induced factor-1 (HIF-1α) in HUVECs were upregulated, while the level of miR-19b-3p was downregulated. Knockdown of MALAT1 with siRNA significantly reduced the HIF-1α level induced by HYP. In addition, MALAT1 knockdown inhibited HYP-induced HUVECs apoptosis, autophagy and inflammation. The overexpression of HIF-1α overcame the effect of MALAT1 knockdown. Mechanism analysis showed that MALAT1-targeted miR-19b-3p and then regulated downstream HIF-1α. MALAT1 knockdown increased the level of miR-19b-3p in cells, and increased miR-19b-3p further inhibited the expression of HIF-1α, thereby reducing the HYP-induced HUVECs apoptosis, autophagy and inflammation. Taken together, these results suggest that MALAT1 may be a potential target for mitigating HYP-induced endothelial cell injury.
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Affiliation(s)
- Huzi Liu
- Department of Cardiothoracic Surgery, The Second Hospital of Shanxi Medical University, Shanxi Medical University, Taiyuan, 030001, China
| | - Chunli Shi
- Department of Outpatient, Shanxi Cardiovascular Hospital (Institute), The Affiliated Cardiovascular Hospital of Shanxi Medical University, Shanxi Medical University, Taiyuan, 030024, China
| | - Yongzhi Deng
- Department of Cardiovascular Surgery, Shanxi Cardiovascular Hospital (Institute), The Affiliated Cardiovascular Hospital of Shanxi Medical University, Shanxi Medical University, No. 18, Yifen Street, Wanbailin District, Taiyuan, 030024, Shanxi, China.
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Ritter A, Hirschfeld M, Berner K, Rücker G, Jäger M, Weiss D, Medl M, Nöthling C, Gassner S, Asberger J, Erbes T. Circulating non‑coding RNA‑biomarker potential in neoadjuvant chemotherapy of triple negative breast cancer? Int J Oncol 2019; 56:47-68. [PMID: 31789396 PMCID: PMC6910196 DOI: 10.3892/ijo.2019.4920] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 09/26/2019] [Indexed: 12/11/2022] Open
Abstract
Due to the positive association between neoadjuvant chemotherapy (NACT) and the promising early response rates of patients with triple negative breast cancer (TNBC), including probabilities of pathological complete response, NACT is increasingly used in TNBC management. Liquid biopsy-based biomarkers with the power to diagnose the early response to NACT may support established monitoring tools, which are to a certain extent imprecise and costly. Simple serum- or urine-based analyses of non-coding RNA (ncRNA) expression may allow for fast, minimally-invasive testing and timely adjustment of the therapy regimen. The present study investigated breast cancer-related ncRNAs [microRNA (miR)-7, -9, -15a, -17, -18a, -19b, -21, -30b, -222 and -320c, PIWI-interacting RNA-36743 and GlyCCC2] in triple positive BT-474 cells and three TNBC cell lines (BT-20, HS-578T and MDA-MB-231) treated with various chemotherapeutic agents using reverse transcription-quantitative PCR. Intracellular and secreted microvesicular ncRNA expression levels were analysed using a multivariable statistical regression analysis. Chemotherapy-driven effects were investigated by analysing cell cycle determinants at the mRNA and protein levels. Serum and urine specimens from 8 patients with TNBC were compared with 10 healthy females using two-sample t-tests. Samples from the patients with TNBC were compared at two time points. Chemotherapeutic treatments induced distinct changes in ncRNA expression in TNBC cell lines and the BT-474 cell line in intra- and extracellular compartments. Serum and urine-based ncRNA expression analysis was able to discriminate between patients with TNBC and controls. Time point comparisons in the urine samples of patients with TNBC revealed a general rise in the level of ncRNA. Serum data suggested a potential association between piR-36743, miR-17, -19b and -30b expression levels and an NACT-driven complete clinical response. The present study highlighted the potential of ncRNAs as liquid biopsy-based biomarkers in TNBC chemotherapy treatment. The ncRNAs tested in the present study have been previously investigated for their involvement in BC or TNBC chemotherapy responses; however, these previous studies were restricted to patient tissue or in vitro models. The data from the present study offer novel insight into ncRNA expression in liquid samples from patients with TNBC, and the study serves as an initial step in the evaluation of ncRNAs as diagnostic biomarkers in the monitoring of TNBC therapy.
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Affiliation(s)
- Andrea Ritter
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Marc Hirschfeld
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Kai Berner
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Gerta Rücker
- Institute of Medical Biometry and Statistics, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79104 Freiburg, Germany
| | - Markus Jäger
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Daniela Weiss
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Markus Medl
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Claudia Nöthling
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Sandra Gassner
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Jasmin Asberger
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
| | - Thalia Erbes
- Department of Obstetrics and Gynecology, Faculty of Medicine, Medical Center‑University of Freiburg, D‑79106 Freiburg, Germany
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Wang Y, Li H, Lu H, Qin Y. Circular RNA SMARCA5 inhibits the proliferation, migration, and invasion of non-small cell lung cancer by miR-19b-3p/HOXA9 axis. Onco Targets Ther 2019; 12:7055-7065. [PMID: 31564891 PMCID: PMC6722457 DOI: 10.2147/ott.s216320] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 08/06/2019] [Indexed: 12/20/2022] Open
Abstract
Background Non-small cell lung cancer (NSCLC) is the main type of lung cancer, remaining a leading cause of cancer-related mortality around the world. Circular RNA SMARCA5 (circSMARCA5) is a novel circular RNA associated with the pathogenesis of several cancers. However, the role of circSMARCA5 in NSCLC remains unknown. In the present study, we aimed to evaluate the functions of circSMARCA5 in NSCLC and the underlying mechanism. Methods The expression pattern of circSMARCA5 was determined using qRT-PCR in NSCLC samples and cell lines. The correlation between miR-19b-3p and circSMARCA5 in NSCLC tissues was detected by qRT-PCR. Cell proliferation was examined utilizing CCK-8 assay. Cell migration and invasion was evaluated using Transwell assay. We used the bioinformatics software TargetScan and miRanda to predict circRNA-miRNA and miRNAi-mRNA interactions. Further, the regulatory role of circSMARCA5 in the malignant development of NSCLC in vivo was examined. Results The results showed that circSMARCA5 was down-regulated in NSCLC tissues as compared to the adjacent normal tissues. Overexpression of circSMARCA5 in NSCLC cell lines significantly inhibited the proliferation, migration, and invasion. Furthermore, circSMARCA5 exerted its tumor-suppressive activity through acting as a sponge for microRNA (miR)-19b-3p. Suppression of miR-19b-3p exhibited inhibitory effects on proliferation, migration, and invasion of NSCLC cell lines, which could be attributed to the regulation of homeobox A9 expression. Finally, overexpression of circSMARCA5 inhibited tumor growth in vivo. Conclusion Collectively, circSMARCA5 executed its inhibitory effects on NSCLC cell lines through miR-19b-3p/HOXA9 axis. The results indicated that circSMARCA5 might be a therapeutic target for the treatment of NSCLC.
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Affiliation(s)
- Yaqiu Wang
- Department of Oncology, Huaihe Hospital of Henan University, Kaifeng 475000, People's Republic of China
| | - Huiping Li
- Respiratory Medicine, the First Affiliated Hospital of Henan University, Kaifeng 475000, People's Republic of China
| | - Hong Lu
- Department of Oncology, Huaihe Hospital of Henan University, Kaifeng 475000, People's Republic of China
| | - Yaguang Qin
- Department of Oncology, Huaihe Hospital of Henan University, Kaifeng 475000, People's Republic of China
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Klinge CM, Piell KM, Tooley CS, Rouchka EC. HNRNPA2/B1 is upregulated in endocrine-resistant LCC9 breast cancer cells and alters the miRNA transcriptome when overexpressed in MCF-7 cells. Sci Rep 2019; 9:9430. [PMID: 31263129 PMCID: PMC6603045 DOI: 10.1038/s41598-019-45636-8] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 06/10/2019] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs are dysregulated in breast cancer. Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2/B1) is a reader of the N(6)-methyladenosine (m6A) mark in primary-miRNAs (pri-miRNAs) and promotes DROSHA processing to precursor-miRNAs (pre-miRNAs). We examined the expression of writers, readers, and erasers of m6A and report that HNRNPA2/B1 expression is higher in tamoxifen-resistant LCC9 breast cancer cells as compared to parental, tamoxifen-sensitive MCF-7 cells. To examine how increased expression of HNRNPA2/B1 affects miRNA expression, HNRNPA2/B1 was transiently overexpressed (~5.4-fold) in MCF-7 cells for whole genome miRNA profiling (miRNA-seq). 148 and 88 miRNAs were up- and down-regulated, respectively, 48 h after transfection and 177 and 172 up- and down-regulated, respectively, 72 h after transfection. MetaCore Enrichment analysis identified progesterone receptor action and transforming growth factor β (TGFβ) signaling via miRNA in breast cancer as pathways downstream of the upregulated miRNAs and TGFβ signaling via SMADs and Notch signaling as pathways of the downregulated miRNAs. GO biological processes for mRNA targets of HNRNPA2/B1-regulated miRNAs included response to estradiol and cell-substrate adhesion. qPCR confirmed HNRNPA2B1 downregulation of miR-29a-3p, miR-29b-3p, and miR-222 and upregulation of miR-1266-5p, miR-1268a, miR-671-3p. Transient overexpression of HNRNPA2/B1 reduced MCF-7 sensitivity to 4-hydroxytamoxifen and fulvestrant, suggesting a role for HNRNPA2/B1 in endocrine-resistance.
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Affiliation(s)
- Carolyn M Klinge
- Department of Biochemistry & Molecular Genetics, University of Louisville School of Medicine, Louisville, KY, 40292, USA.
| | - Kellianne M Piell
- Department of Biochemistry & Molecular Genetics, University of Louisville School of Medicine, Louisville, KY, 40292, USA
| | - Christine Schaner Tooley
- Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, 14203, USA
| | - Eric C Rouchka
- Bioinformatics and Biomedical Computing Laboratory, Department of Computer Engineering and Computer Science, University of Louisville, Louisville, KY, 40292, USA
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