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Liu Y, Zhang K, Yang X. CircMCTP2 enhances the progression of bladder cancer by regulating the miR-99a-5p/FZD8 axis. J Egypt Natl Canc Inst 2024; 36:8. [PMID: 38494582 DOI: 10.1186/s43046-024-00206-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 01/13/2024] [Indexed: 03/19/2024] Open
Abstract
BACKGROUND CircRNAs and miRNAs are involved in the progression of tumor. CircMCTP2 is considered as a novel tumor promoter. However, the exact functions of circMCTP2 in bladder cancer are still unclear. This study was designed to explore the underlying mechanisms of circMCTP2-modulated tumor development in bladder cancer. METHODS The present study is an original research. The levels of circMCTP2 in a total of 39 bladder cancer specimens and cell lines were determined by RT-qPCR. The expression of FZD8 in T24 and RT-4 cells treated with miR-99a-5p mimics were examined using western blotting. In addition, the proliferative, migrative and invasive abilities of transfected cells were determined by CCK8 and Transwell assays. Furthermore, the apoptosis of transfected cells was evaluated using flow cytometry. Dual luciferase reporter assay was performed to elucidate the relationship between miR-99a-5p and circMCTP2/FZD8. RESULTS The levels of circMCTP2 were elevated in bladder cancer samples and cells, and this was related to worse survival rate. Downregulation of circMCTP2 suppressed growth and metastasis of cells, whereas the apoptotic rate of cells was enhanced. The levels of miR-99a-5rp was elevated after the downregulation of circMCTP2. Moreover, reverse correlation between the expression of miR-99a-5p and circMCTP2 was revealed in bladder cancer specimens. Additionally, FZD8 was the putative target of miR-99a-5p and the mimics of miR-99a-5p inhibited the proliferation, migration and invasion of bladder cancer cells via the FZD8/Wnt-b-catenin axis. Moreover, circMCTP2 regulated the growth and metastasis of bladder cancer cells potentially through regulating the miR-99a-5p/FZD8/Wnt-b-catenin axis. In summary, circMCTP2 was considered as an oncogenic factor through regulating the miR-99a-5p/FZD8/Wnt-b-catenin axis. CONCLUSIONS This novel signaling could regulate the biological behaviours of bladder cancer cells, and these findings highlighted circMCTP2 as a critical target for treating bladder cancer.
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Affiliation(s)
- Yan Liu
- Department of Urinary Surgery, the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China.
| | - Kexin Zhang
- Department of Urinary Surgery, the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China
| | - Xianxu Yang
- Department of Urinary Surgery, the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province, 121000, China
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Zhai S, Li X, Lin T. Obese Mouse Fat Cell-derived Extracellular Vesicles Transport miR-99a-5p to Mitigate the Proliferation and Migration of Non-small Cell Lung Cancer Cells. Comb Chem High Throughput Screen 2024; 27:214-226. [PMID: 36927435 DOI: 10.2174/1386207326666230316103604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 12/29/2022] [Accepted: 01/20/2023] [Indexed: 03/18/2023]
Abstract
OBJECTIVE Fat cells-derived extracellular vesicles (FC-EVs) play a role in regulating the tumor microenvironment in cancers by transporting RNAs. MicroRNAs (miRNAs) are vital regulators of cancer development. This study was conducted to explore the role of FC-EVs in the proliferation and migration of non-small cell lung cancer (NSCLC) cells, providing targets for NSCLC treatment. METHODS The obese mouse model was established via high-fat diet (HFD), followed by separation and characterization of FC-EVs (HFD-EVs). The levels of miR-99a-5p, precursor-miR-99a-5p, and heparan sulfate-glucosamine 3-sulfotransferase 3B1 (HS3ST3B1) were measured by RT-qPCR or Western blot assay. Cell proliferation and migration were evaluated by 3-(4, 5-dimethylthiazol- 2-yl)-2, 5-diphenyltetrazolium bromide and wound healing assays. The expression of Cy3-labeled miR-99a-5p in A549 cells (one NSCLC cell line) was observed via confocal microscopy. The binding of miR-99a-5p to HS3ST3B1 was analyzed by the dual luciferase assay. Rescue experiments were performed to confirm the role of HS3ST3B1 in NSCLC cells. RESULTS miR-99a-5p was upregulated in adipose tissues, FCs, and HFD-EVs. HFD-EVs mitigated the proliferation and migration of NSCLC cells. HFD-EVs transported miR-99a-5p into A549 cells, which upregulated miR-99a-5p expression and inhibited HS3ST3B1 expression in A549 cells. HS3ST3B1 overexpression reversed the inhibition of HFD-EVs on the proliferation and migration of NSCLC cells. CONCLUSION HFD-EVs transported miR-99a-5p into NSCLC cells and inhibited HS3ST3B1, thereby inhibiting proliferation and migration of NSCLC cells.
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Affiliation(s)
- Shengping Zhai
- Department of General Practice, Yantai Yuhuangding Hospital Affiliated to Qingdao University, Yantai, 264000, China
| | - Xiaoping Li
- Department of Pulmonary and Critical Care Medicine, Yantai Yuhuangding Hospital Affiliated to Qingdao University, Yantai, 264000, China
| | - Tiantian Lin
- Respiratory Intensive Care Unit, Yantai Yuhuangding Hospital Affiliated to Qingdao University, Yantai, 264000, China
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Tonyan ZN, Barbitoff YA, Nasykhova YA, Danilova MM, Kozyulina PY, Mikhailova AA, Bulgakova OL, Vlasova ME, Golovkin NV, Glotov AS. Plasma microRNA Profiling in Type 2 Diabetes Mellitus: A Pilot Study. Int J Mol Sci 2023; 24:17406. [PMID: 38139235 PMCID: PMC10744218 DOI: 10.3390/ijms242417406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/04/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023] Open
Abstract
Type 2 diabetes mellitus (T2D) is a chronic metabolic disease characterized by insulin resistance and β-cell dysfunction and leading to many micro- and macrovascular complications. In this study we analyzed the circulating miRNA expression profiles in plasma samples from 44 patients with T2D and 22 healthy individuals using next generation sequencing and detected 229 differentially expressed miRNAs. An increased level of miR-5588-5p, miR-125b-2-3p, miR-1284, and a reduced level of miR-496 in T2D patients was verified. We also compared the expression landscapes in the same group of patients depending on body mass index and identified differential expression of miR-144-3p and miR-99a-5p in obese individuals. Identification and functional analysis of putative target genes was performed for miR-5588-5p, miR-125b-2-3p, miR-1284, and miR-496, showing chromatin modifying enzymes and apoptotic genes being among the significantly enriched pathways.
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Affiliation(s)
- Ziravard N. Tonyan
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
| | - Yury A. Barbitoff
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
| | - Yulia A. Nasykhova
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
| | - Maria M. Danilova
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
| | - Polina Y. Kozyulina
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
| | - Anastasiia A. Mikhailova
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
| | - Olga L. Bulgakova
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
| | - Margarita E. Vlasova
- St. Martyr George City Hospital, 194354 St. Petersburg, Russia; (M.E.V.); (N.V.G.)
| | - Nikita V. Golovkin
- St. Martyr George City Hospital, 194354 St. Petersburg, Russia; (M.E.V.); (N.V.G.)
| | - Andrey S. Glotov
- Department of Genomic Medicine, D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, 199034 St. Petersburg, Russia; (Z.N.T.); (Y.A.B.); (Y.A.N.); (M.M.D.); (P.Y.K.); (A.A.M.); (O.L.B.)
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Cousseau CPV, Sorroche BP, de Jesus Teixeira R, de Carvalho AC, Melendez ME, de Castro Capuzzo R, Laus AC, da Silva LS, de Menezes NS, Carvalho AL, Arantes LMRB. miR-99a-5p as a biomarker for lymph node metastasis prediction in oral squamous cell carcinoma patients. Head Neck 2023; 45:2489-2497. [PMID: 37522839 DOI: 10.1002/hed.27459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/22/2023] [Accepted: 07/04/2023] [Indexed: 08/01/2023] Open
Abstract
BACKGROUND Metastatic lymph node involvement influences therapy decisions and serves as a prognostic indicator in oral squamous cell carcinoma (OSCC). However, many early-stage patients with clinically negative lymph nodes exhibit no metastasis upon surgical staging. This study aimed to identify differentially expressed miRNAs capable of distinguishing pathologically positive (pN+) from negative (pN0) nodes in OSCC patients without clinical evidence of lymph node metastases (cN0). METHODS Expression levels of 798 miRNAs were assessed in tumor samples from 10 pN+ and 10 pN0 patients using the Nanostring nCounter platform. Validation was performed in an independent cohort of 15 pN+ and 24 pN0 patients through RT-qPCR. RESULTS Eight miRNAs exhibited differential expression between pN0 and pN+ patients. Notably, hsa-miR-99a-5p demonstrated high sensitivity and specificity in predicting patients at higher risk of positive lymph nodes. CONCLUSIONS These findings highlight hsa-miR-99a-5p as a potential biomarker for detecting lymph node metastasis in primary OSCC tumors.
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Affiliation(s)
| | | | | | | | - Matias Eliseo Melendez
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
- Brazilian National Cancer Institute, Rio de Janeiro, Brazil
| | | | - Ana Carolina Laus
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
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Huang Y, Guan Y, Zhang X. METTL3-Mediated Maturation of miR-99a-5p Promotes Cell Migration and Invasion in Oral Squamous Cell Carcinoma by Targeting ZBTB7A. Mol Biotechnol 2023:10.1007/s12033-023-00815-x. [PMID: 37498409 DOI: 10.1007/s12033-023-00815-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 06/29/2023] [Indexed: 07/28/2023]
Abstract
METTL3 is an important methyltransferase in N(6)-methyladenosine (m6A) modification. Recently, METTL3 mediates methylation of pri-microRNA (miRNA) to accelerate miRNA maturation, regulating tumor development. This study explored whether METTL3 mediated miR-99a-5p to influence oral squamous cell carcinoma (OSCC) cell metastasis. MiR-99a-5p, ZBTB7A, and MATTL3 expression was measured using quantitative real-time PCR. Biological behaviors were assessed using cell counting kit-8, flow cytometry, Transwell assay, as well as western blot. Luciferase reporter assay evaluated the interaction between miR-99a-5p and ZBTB7A. METTL3-regulated pri-miR-99a-5p processing was determined by RNA binding protein immunoprecipitation (RIP) and methylated RNA immunoprecipitation (MeRIP) assays. The consequences clarified that miR-99a-5p was upregulated in OSCC cells. Downregulation of miR-99a-5p suppressed cellular viability, migration, invasion, and epithelial-mesenchymal transition (EMT), and induced apoptosis. ZBTB7A acted as a miR-99a-5p target and reversed the effects on cellular behaviors induced by miR-99a-5p inhibitor. m6A content and METTL3 expression were increased in OSCC cells. METTL3 promoted the m6A modification of pri-miR-99a-5p and thereby facilitated miR-99a-5p processing. Moreover, knockdown of METTL3 inhibited OSCC metastasis by downregulating miR-99a-5p. Taken together, METTL3 promoted miR-99a-5p maturation in an m6A-dependent manner, which further targets ZBTB7A to accelerate the progression of OSCC. These findings suggest potential targets for OSCC therapy.
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Affiliation(s)
- Yuhua Huang
- Department of stomatology, The Second Affiliated Hospital of Guangzhou, University of Chinese Medicine, 6/F, East Zone, No. 111, Dade Road, Yuexiu District, Guangzhou, 510000, Guangdong, China
| | - Yun Guan
- Department of stomatology, The Second Affiliated Hospital of Guangzhou, University of Chinese Medicine, 6/F, East Zone, No. 111, Dade Road, Yuexiu District, Guangzhou, 510000, Guangdong, China
| | - Xing Zhang
- Department of stomatology, The Second Affiliated Hospital of Guangzhou, University of Chinese Medicine, 6/F, East Zone, No. 111, Dade Road, Yuexiu District, Guangzhou, 510000, Guangdong, China.
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Tamai M, Tatarano S, Okamura S, Fukumoto W, Kawakami I, Osako Y, Sakaguchi T, Sugita S, Yonemori M, Yamada Y, Nakagawa M, Enokida H, Yoshino H. microRNA-99a-5p induces cellular senescence in gemcitabine-resistant bladder cancer by targeting SMARCD1. Mol Oncol 2022; 16:1329-1346. [PMID: 35148461 PMCID: PMC8936529 DOI: 10.1002/1878-0261.13192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 01/02/2022] [Accepted: 02/09/2022] [Indexed: 12/02/2022] Open
Abstract
Patients with advanced bladder cancer are generally treated with a combination of chemotherapeutics, including gemcitabine, but the effect is limited due to acquisition of drug resistance. Thus, in this study, we investigated the mechanism of gemcitabine resistance. First, gemcitabine‐resistant cells were established and resistance confirmed in vitro and in vivo. Small RNA sequencing analyses were performed to search for miRNAs involved in gemcitabine resistance. miR‐99a‐5p, selected as a candidate miRNA, was downregulated compared to its parental cells. In gain‐of‐function studies, miR‐99a‐5p inhibited cell viabilities and restored sensitivity to gemcitabine. RNA sequencing analysis was performed to find the target gene of miR‐99a‐5p. SMARCD1 was selected as a candidate gene. Dual‐luciferase reporter assays showed that miR‐99a‐5p directly regulated SMARCD1. Loss‐of‐function studies conducted with si‐RNAs revealed suppression of cell functions and restoration of gemcitabine sensitivity. miR‐99a‐5p overexpression and SMARCD1 knockdown also suppressed gemcitabine‐resistant cells in vivo. Furthermore, β‐galactosidase staining showed that miR‐99a‐5p induction and SMARCD1 suppression contributed to cellular senescence. In summary, tumor‐suppressive miR‐99a‐5p induced cellular senescence in gemcitabine‐resistant bladder cancer cells by targeting SMARCD1.
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Affiliation(s)
- Motoki Tamai
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Shuichi Tatarano
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Shunsuke Okamura
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Wataru Fukumoto
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Issei Kawakami
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Yoichi Osako
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Takashi Sakaguchi
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Satoshi Sugita
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Masaya Yonemori
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Yasutoshi Yamada
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Masayuki Nakagawa
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Hideki Enokida
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Hirofumi Yoshino
- Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima Uni versity, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
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Sun X, Yan H. MicroRNA-99a-5p suppresses cell proliferation, migration, and invasion by targeting isoprenylcysteine carboxylmethyltransferase in oral squamous cell carcinoma. J Int Med Res 2021; 49:300060520939031. [PMID: 34038200 PMCID: PMC8161884 DOI: 10.1177/0300060520939031] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND MicroRNA (miR)-99a-5p acts as a tumor suppressor in several tumors, including bladder cancer and breast cancer, but its biological function in oral squamous cell carcinoma (OSCC) is poorly understood. METHODS miR-99a-5p expression was determined in OSCC tissues and cell lines using quantitative reverse transcription polymerase chain reaction (RT-qPCR). Cell proliferation was assessed by the Cell Counting Kit-8 assay and colony formation assay. Wound healing and Transwell assays were used to analyze migration and invasion abilities, respectively, in OSCC cells. The luciferase reporter assay, RT-qPCR, and western blotting were used to determine the relationship between miR-99a-5p and isoprenylcysteine carboxylmethyltransferase (ICMT). RESULTS miR-99a-5p expression in OSCC tissues and cell lines was significantly decreased compared with corresponding controls, and was significantly associated with clinical stage and lymph node metastasis in OSCC. Functional assays revealed that miR-99a-5p overexpression significantly inhibited the proliferation, migration, and invasion abilities of CAL-27 and TCA-8113 OSCC cells. miR-99a-5p was found to directly target ICMT, while ICMT restoration reversed the role of miR-99a-5p in OSCC cells. CONCLUSIONS Our results indicate that miR-99a-5p-mediates the down-regulation of ICMT, which could be used as a novel potential therapeutic target for OSCC treatment.
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Affiliation(s)
- Xiang Sun
- Department of Stomatology, Yulin First Hospital, Yulin, Shaanxi Province, China
| | - Huixin Yan
- Department of Stomatology, Yan'an Hospital of Traditional Chinese Medicine, Yan'an, Shaanxi Province, China
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Sun G, Li Z, He Z, Wang W, Wang S, Zhang X, Cao J, Xu P, Wang H, Huang X, Xia Y, Lv J, Xuan Z, Jiang T, Fang L, Yang J, Zhang D, Xu H, Xu Z. Circular RNA MCTP2 inhibits cisplatin resistance in gastric cancer by miR-99a-5p-mediated induction of MTMR3 expression. J Exp Clin Cancer Res 2020; 39:246. [PMID: 33198772 PMCID: PMC7670601 DOI: 10.1186/s13046-020-01758-w] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 11/01/2020] [Indexed: 01/01/2023]
Abstract
Background Cisplatin (CDDP) is the first-line chemotherapy for gastric cancer (GC). The poor prognosis of GC patients is partially due to the development of CDDP resistance. Circular RNAs (circRNAs) are a subclass of noncoding RNAs that function as microRNA (miRNA) sponges. The role of circRNAs in CDDP resistance in GC has not been evaluated. Methods RNA sequencing was used to identify the differentially expressed circRNAs between CDDP-resistant and CDDP-sensitive GC cells. qRT-PCR was used to detect the expression of circMCTP2 in GC tissues. The effects of circMCTP2 on CDDP resistance were investigated in vitro and in vivo. Pull-down assays and luciferase reporter assays were performed to confirm the interactions among circMCTP2, miR-99a-5p, and myotubularin-related protein 3 (MTMR3). The protein expression levels of MTMR3 were detected by western blotting. Autophagy was evaluated by confocal microscopy and transmission electron microscopy (TEM). Results CircMCTP2 was downregulated in CDDP-resistant GC cells and tissues compared to CDDP-sensitive GC cells and tissues. A high level of circMCTP2 was found to be a favorable factor for the prognosis of patients with GC. CircMCTP2 inhibited proliferation while promoting apoptosis of CDDP-resistant GC cells in response to CDDP treatment. CircMCTP2 was also found to reduce autophagy in CDDP-resistant GC cells. MiR-99a-5p was verified to be sponged by circMCTP2. Inhibition of miR-99a-5p could sensitize GC cells to CDDP. MTMR3 was confirmed to be a direct target of miR-99a-5p. Knockdown of MTMR3 reversed the effects of circMCTP2 on the proliferation, apoptosis and autophagy of CDDP-resistant GC cells. CircMCTP2 was also confirmed to inhibit CDDP resistance in vivo in a nude mouse xenograft model. Conclusions CircMCTP2 sensitizes GC to CDDP through the upregulation of MTMR3 by sponging miR-99a-5p. Overexpression of CircMCTP2 could be a new therapeutic strategy for counteracting CDDP resistance in GC. Supplementary Information The online version contains supplementary material available at 10.1186/s13046-020-01758-w.
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Affiliation(s)
- Guangli Sun
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Zheng Li
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Zhongyuan He
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Weizhi Wang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Sen Wang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Xing Zhang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Jiacheng Cao
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Penghui Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Haixiao Wang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Xiaoxu Huang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Yiwen Xia
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Jialun Lv
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Zhe Xuan
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Tianlu Jiang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Lang Fang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Jing Yang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Diancai Zhang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Hao Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China
| | - Zekuan Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu province, China. .,Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, Jiangsu province, China.
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Mizuno K, Tanigawa K, Nohata N, Misono S, Okada R, Asai S, Moriya S, Suetsugu T, Inoue H, Seki N. FAM64A: A Novel Oncogenic Target of Lung Adenocarcinoma Regulated by Both Strands of miR-99a ( miR-99a-5p and miR-99a-3p). Cells 2020; 9:E2083. [PMID: 32932948 DOI: 10.3390/cells9092083] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 08/28/2020] [Accepted: 09/10/2020] [Indexed: 02/06/2023] Open
Abstract
Lung adenocarcinoma (LUAD) is the most aggressive cancer and the prognosis of these patients is unfavorable. We revealed that the expression levels of both strands of miR-99a (miR-99a-5p and miR-99a-3p) were significantly suppressed in several cancer tissues. Analyses of large The Cancer Genome Atlas (TCGA) datasets showed that reduced miR-99a-5p or miR-99a-3p expression is associated with worse prognoses in LUAD patients (disease-free survival (DFS): p = 0.1264 and 0.0316; overall survival (OS): p = 0.0176 and 0.0756, respectively). Ectopic expression of these miRNAs attenuated LUAD cell proliferation, suggesting their tumor-suppressive roles. Our in silico analysis revealed 23 putative target genes of pre-miR-99a in LUAD cells. Among these targets, high expressions of 19 genes were associated with worse prognoses in LUAD patients (OS: p < 0.05). Notably, FAM64A was regulated by both miR-99a-5p and miR-99a-3p in LUAD cells, and its aberrant expression was significantly associated with poor prognosis in LUAD patients (OS: p = 0.0175; DFS: p = 0.0276). FAM64A knockdown using siRNAs suggested that elevated FAM64A expression contributes to cancer progression. Aberrant FAM64A expression was detected in LUAD tissues by immunostaining. Taken together, our miRNA-based analysis might be effective for identifying prognostic and therapeutic molecules in LUAD.
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Cao X, Tang S, Du F, Li H, Shen X, Li D, Wang Y, Zhang Z, Xia L, Zhu Q, Yin H. miR-99a-5p Regulates the Proliferation and Differentiation of Skeletal Muscle Satellite Cells by Targeting MTMR3 in Chicken. Genes (Basel) 2020; 11:E369. [PMID: 32235323 DOI: 10.3390/genes11040369] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/18/2020] [Accepted: 03/28/2020] [Indexed: 01/03/2023] Open
Abstract
Noncoding RNAs, especially microRNAs (miRNAs), have been reported to play important roles during skeletal muscle development and regeneration. Our previous sequencing data revealed that miR-99a-5p is one of the most abundant miRNAs in chicken breast muscle. The purpose of this study was to reveal the regulatory mechanism of miR-99a-5p in the proliferation and differentiation of chicken skeletal muscle satellite cells (SMSCs). Through the investigation of cell proliferation activity, cell cycle progression, and 5-ethynyl-29-deoxyuridine (EdU) assay, we found that miR-99a-5p can significantly promote the proliferation of SMSCs. Moreover, we found that miR-99a-5p can inhibit myotube formation by decreasing the expression of muscle cell differentiation marker genes. After miR-99a-5p target gene scanning, we confirmed that miR-99a-5p directly targets the 3′ untranslated region (UTR) of myotubularin-related protein 3 (MTMR3) and regulates its expression level during chicken SMSC proliferation and differentiation. We also explored the role of MTMR3 in muscle development and found that its knockdown significantly facilitates the proliferation but represses the differentiation of SMSCs, which is opposite to the effects of miR-99a-5p. Overall, we demonstrated that miR-99a-5p regulates the proliferation and differentiation of SMSCs by targeting MTMR3.
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11
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Liu Y, Li B, Yang X, Zhang C. MiR-99a-5p inhibits bladder cancer cell proliferation by directly targeting mammalian target of rapamycin and predicts patient survival. J Cell Biochem 2018; 120:19330-19337. [PMID: 30560585 DOI: 10.1002/jcb.27318] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 06/27/2018] [Indexed: 12/14/2022]
Abstract
Bladder cancer is a common malignancy and miR-99a-5p has been reported to be downregulated in bladder cancer, but its function and the underlying mechanism in bladder cancer development remains largely unclear. Here, we report that miR-99a-5p expression was decreased in bladder cancer compared with the adjacent normal tissues. Receiver operating characteristic curve revealed that miR-99a-5p expression signature had area under curve value of 0.7989 in differing bladder cancer from the adjacent normal tissues. Bladder cancer patients with low expression of miR-99a-5p had a poor survival rate. Gain-of-function and loss-of-function approaches demonstrated that miR-99a-5p inhibited bladder cell proliferation and cell cycle. Furthermore, we identified that mammalian target of rapamycin (mTOR) was a direct target of miR-99a-5p and mTOR restore could rescue the proliferative ability of bladder cancer cells. Moreover, miR-99a-5p/mTOR axis regulated S6K1 phosphorylation. These suggested that miR-99a-5p/mTOR axis might be a therapeutic target for bladder cancer.
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Affiliation(s)
- Yan Liu
- Department of Urinary Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Bingxun Li
- Department of Urinary Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Xianxu Yang
- Department of Urinary Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Chenglong Zhang
- Department of Urinary Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
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12
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Arai T, Okato A, Yamada Y, Sugawara S, Kurozumi A, Kojima S, Yamazaki K, Naya Y, Ichikawa T, Seki N. Regulation of NCAPG by miR-99a-3p (passenger strand) inhibits cancer cell aggressiveness and is involved in CRPC. Cancer Med 2018; 7:1988-2002. [PMID: 29608247 PMCID: PMC5943442 DOI: 10.1002/cam4.1455] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 02/26/2018] [Accepted: 02/28/2018] [Indexed: 12/11/2022] Open
Abstract
Effective treatments for patients with castration-resistant prostate cancer (CRPC) have not yet been established. Novel approaches for identification of putative therapeutic targets for CRPC are needed. Analyses of RNA sequencing of microRNA (miRNA) expression revealed that miR-99a-3p (passenger strand) is significantly downregulated in several types of cancers. Here, we aimed to identify novel miR-99a-3p regulatory networks and therapeutic targets for CRPC. Ectopic expression of miR-99a-3p significantly inhibited cancer cell proliferation, migration, and invasion in PCa cells. Non-SMC condensin I complex subunit G (NCAPG) was a direct target of miR-99a-3p in PCa cells. Overexpression of NCAPG was detected in CRPC clinical specimens and was significantly associated with shorter disease-free survival and advanced clinical stage. Knockdown of NCAPG inhibited cancer cell aggressiveness. The passenger strand miR-99a-3p acted as an antitumor miRNA in naïve PCa and CRPC. NCAPG was regulated by miR-99a-3p, and its overexpression was involved in CRPC pathogenesis. Involvement of passenger strand of miRNA in cancer pathogenesis is novel concept, and identification of antitumor miRNA regulatory networks in CRPC might be provided novel prognostic markers and therapeutic targets for this disease.
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Affiliation(s)
- Takayuki Arai
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba, Japan.,Department of Urology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Atsushi Okato
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba, Japan.,Department of Urology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yasutaka Yamada
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba, Japan.,Department of Urology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Sho Sugawara
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba, Japan.,Department of Urology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Akira Kurozumi
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba, Japan.,Department of Urology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Satoko Kojima
- Department of Urology, Teikyo University Chiba Medical Center, Ichihara, Japan
| | - Kazuto Yamazaki
- Department of Pathology, Teikyo University Chiba Medical Center, Ichihara, Japan
| | - Yukio Naya
- Department of Urology, Teikyo University Chiba Medical Center, Ichihara, Japan
| | - Tomohiko Ichikawa
- Department of Urology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Naohiko Seki
- Department of Functional Genomics, Chiba University Graduate School of Medicine, Chiba, Japan
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13
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Tsai TF, Lin JF, Chou KY, Lin YC, Chen HE, Hwang TIS. miR-99a-5p acts as tumor suppressor via targeting to mTOR and enhances RAD001-induced apoptosis in human urinary bladder urothelial carcinoma cells. Onco Targets Ther 2018; 11:239-252. [PMID: 29379304 PMCID: PMC5757495 DOI: 10.2147/ott.s114276] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Introduction miR-99a-5p, known to play an important role in mammalian target of rapamycin (mTOR) regulation, is downregulated in human bladder cancer. The study aimed to investigate the anticancer activity of miR-99a-5p and the possible mechanism associated with mTOR in bladder cancer cells. Materials and methods Vectors expressing miR-99a-5p were transfected into human urinary bladder urothelial carcinoma (5637 and T24) cells. The level of miR-99a-5p was monitored by microRNA (miRNA) quantitative polymerase chain reaction (QPCR). Luciferase reporter assays were performed to verify the direct binding of miR-99a-5p to mTOR transcripts. The mTOR transcripts and protein levels were measured by QPCR and Western blot, respectively. Cell viability of miR-99a-5p-transfected cells was detected by tetrazolium salt (WST-1). Inhibition of mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2) signaling was detected by the phosphorylation of mTOR and AKT using Western blot. The ability of miR-99a-5p to enhance RAD001-induced apoptosis was determined as the expression of cleaved caspase 3 and levels of DNA fragmentation. Results Transfection of miR-99a-5p-expressing vector elevated the expression level of miR-99a-5p up to sixfold compared to vector-only controls. The results from luciferase assay verified that miR-99a-5p directly binds to the predicted sequence in the 3′ untranslated region (3′-UTR) of mTOR. The levels of mTOR RNA and protein were decreased in miR-99a-5p-transfected cells. Dual inhibition of mTORC1 and mTORC2 by miR-99a-5p was confirmed by the decreased phosphorylation of mTOR (at Ser2448 and Ser2481), phospho-rpS6 and phospho-4EBP1. The phosphorylation of AKT was significantly inhibited in miR-99a-5p-transfected cells upon RAD001 treatment. Enforced expression of miR-99a-5p potentiated RAD001-induced apoptosis in these cells. Conclusion This is the first study showing that miR-99a-5p markedly inhibits the growth of bladder cancer cells via dual inhibition of mTORC1 and mTORC2. Our data demonstrated that forced expression of miR-99a-5p inhibits the feedback of AKT survival pathway and enhances the induction of apoptosis in RAD001-treated bladder cancer cells.
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Affiliation(s)
| | | | | | | | | | - Thomas I-Sheng Hwang
- Department of Urology.,Division of Urology, Department of Surgery, Shin-Kong Wu Ho-Su Memorial Hospital.,Department of Urology, Taipei Medical University.,Division of Urology, School of Medicine, Fu-Jen Catholic University, Taipei, Taiwan, Republic of China
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14
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Zhao H, Li G, Ma Q, Tao Z, Wang R, Fan Z, Feng Y, Ji X, Luo Y. MicroRNA-99a-5p in circulating immune cells as a potential biomarker for the early diagnosis of ischemic stroke. Brain Circ 2017; 3:21-28. [PMID: 30276300 PMCID: PMC6126231 DOI: 10.4103/bc.bc_1_17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 02/04/2017] [Accepted: 02/12/2017] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVES: We have previously shown the neuroprotective function of microRNA-99a-5p in experimental stroke. Here, we explore its diagnostic potential for acute stroke patients. MATERIALS AND METHODS: MiR-99a-5p levels in circulating from acute stroke patients and control were measured by real-time polymerase chain reaction. Pearson's correlation and receiver operator characteristic (ROC) curves were used to analyze clinical significance of miR-99a-5p and its sensitivity and specificity for stroke diagnosis. RESULTS: We demonstrated that miR-99a-5p expression was upregulated in neutrophils of both ischemic stroke and hemorrhage patients, while was only increased in the lymphocytes of hemorrhage patients. ROC analysis revealed that the miR-99a-5p level in neutrophils and lymphocytes had a moderate diagnostic value for stroke. Moreover, a positive correlation existed between plasma miR-99a-5p levels and neutrophil numbers or neutrophil/lymphocyte ratio. Meanwhile, miR-99a-5p levels in neutrophils were negatively correlated with thrombin time, while positively correlated with D-dimer and urea levels. Lymphocytic miR-99a-5p levels were positively correlated with platelet mean volume and distribution width. CONCLUSION: This study demonstrated that miR-99a-5p levels in circulating immune cells might facilitate the diagnosis of ischemic stroke.
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Affiliation(s)
- Haiping Zhao
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China
| | - Guangwen Li
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China
| | - Qingfeng Ma
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China
| | - Zhen Tao
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China
| | - Rongliang Wang
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China
| | - Zhibin Fan
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China
| | - Yan Feng
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China
| | - Xuming Ji
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China.,Beijing Institute for Brain Disorders, Beijing, China
| | - Yumin Luo
- Cerebrovascular Diseases Research Institute and Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China.,Beijing Geriatric Medical Research Center, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Diseases, Beijing, China.,Beijing Institute for Brain Disorders, Beijing, China
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15
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Abstract
BACKGROUND MicroRNAs (miRNAs) are non-coding RNAs that negatively regulate gene expression by preventing the translation of specific mRNA transcripts. Recent studies have shown that miRNAs are stably expressed in human serum samples, making them good candidates for the non-invasive detection of disease. However, before circulating miRNAs can be used reliably as biomarkers of disease, the pre-measurement variables that may affect serum miRNA levels must be assessed. METHODS In this study we used quantitative RT-PCR to examine the effect of hemolysis, fasting, and smoking on the levels of 742 miRNAs in the serum of healthy individuals. We also compared serum miRNA profiles of samples taken from healthy individuals over different time periods to assess normal serum miRNA fluctuations. RESULTS We have found that mechanical hemolysis of blood samples can significantly alter serum miRNA quantification and have identified 162 miRNAs that are significantly up-regulated in hemolysed serum samples. Conversely, fasting and smoking were demonstrated to not have a significant effect on the overall serum miRNA profiles of healthy individuals. The serum miRNA profiles of matched samples taken from individuals over varying time periods showed a high correlation and no miRNAs were significantly differentially expressed in these samples further suggesting the utility of serum miRNAs as biomarkers of disease. Taking the above results into consideration, we have identified miR-99a-5p and miR-139-5p as novel endogenous controls for serum miRNA studies due to their consistency across all sample sets. CONCLUSION These results identify important pre-profiling factors that should be taken into consideration when identifying endogenous controls and candidate biomarkers for circulating miRNA studies.
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Affiliation(s)
- Sara A MacLellan
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, BC, Canada
| | - Calum MacAulay
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, BC, Canada
| | - Stephen Lam
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, BC, Canada
| | - Cathie Garnis
- Department of Integrative Oncology, British Columbia Cancer Research Centre, Vancouver, BC, Canada ; Department of Surgery, University of British Columbia, Vancouver, BC, Canada
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