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Yang Y, Hou X, Kong S, Zha Z, Huang M, Li C, Li N, Ge F, Chen W. Intraoperative radiotherapy in breast cancer: Alterations to the tumor microenvironment and subsequent biological outcomes (Review). Mol Med Rep 2023; 28:231. [PMID: 37888611 PMCID: PMC10636769 DOI: 10.3892/mmr.2023.13118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 10/03/2023] [Indexed: 10/28/2023] Open
Abstract
Intraoperative radiotherapy (IORT) is a precise, single high‑dose irradiation directly targeting the tumor bed during surgery. In comparison with traditional external beam RT, it minimizes damage to other normal tissues, ensures an adequate dose to the tumor bed and results in improved cosmetic outcomes and quality of life. Furthermore, IORT offers a shorter treatment duration, lower economic costs and therapeutic efficacy comparable with traditional RT. However, its relatively higher local recurrence rate limits its further clinical applications. Identifying effective radiosensitizing drugs and rational RT protocols will improve its advantages. Furthermore, IORT may not only damage DNA to directly kill breast tumor cells but also alter the tumor microenvironment (TME) to exert a sustained antitumor effect. Specific doses of IORT may exert anti‑angiogenic effects, and consequently antitumor effects, by impacting post‑radiation peripheral blood levels of vascular endothelial growth factor and delta‑like 4. IORT may also modify the postoperative wound fluid composition to continuously inhibit tumor growth, e.g. by reducing components such as microRNA (miR)‑21, miR‑221, miR‑115, oncostatin M, TNF‑β, IL‑6 and IL‑8, and by elevating levels of components such as miR‑223, to inhibit the ability of postoperative wound fluid to induce proliferation, invasion and migration of residual cancer cells. IORT can also modify cancer cell glucose metabolism to inhibit the proliferation of residual tumor cells. In addition, IORT can induce a bystander effect, eliminating the postoperative wound fluid‑induced epithelial‑mesenchymal transition and tumor stem cell phenotype. Insights gained at the molecular level may provide new directions for identifying novel therapeutic targets and approaches. A more comprehensive understanding of the effects of IORT on the breast cancer (BC) TME may further its clinical application. Hence, the present article reviews the primary effects of IORT on BC and its impact on the TME, aiming to offer fresh research perspectives for relevant professionals.
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Affiliation(s)
- Yang Yang
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
| | - Xiaochen Hou
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
| | - Shujia Kong
- Department of Pharmacy, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
| | - Zhuocen Zha
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
| | - Mingqing Huang
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
| | - Chenxi Li
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
| | - Na Li
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
| | - Fei Ge
- Department of Breast Surgery, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Wenlin Chen
- Third Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University and Yunnan Cancer Hospital, Kunming, Yunnan 650118, P.R. China
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Szczepanek J, Skorupa M, Jarkiewicz-Tretyn J, Cybulski C, Tretyn A. Harnessing Epigenetics for Breast Cancer Therapy: The Role of DNA Methylation, Histone Modifications, and MicroRNA. Int J Mol Sci 2023; 24:ijms24087235. [PMID: 37108398 PMCID: PMC10138995 DOI: 10.3390/ijms24087235] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/24/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Breast cancer exhibits various epigenetic abnormalities that regulate gene expression and contribute to tumor characteristics. Epigenetic alterations play a significant role in cancer development and progression, and epigenetic-targeting drugs such as DNA methyltransferase inhibitors, histone-modifying enzymes, and mRNA regulators (such as miRNA mimics and antagomiRs) can reverse these alterations. Therefore, these epigenetic-targeting drugs are promising candidates for cancer treatment. However, there is currently no effective epi-drug monotherapy for breast cancer. Combining epigenetic drugs with conventional therapies has yielded positive outcomes and may be a promising strategy for breast cancer therapy. DNA methyltransferase inhibitors, such as azacitidine, and histone deacetylase inhibitors, such as vorinostat, have been used in combination with chemotherapy to treat breast cancer. miRNA regulators, such as miRNA mimics and antagomiRs, can alter the expression of specific genes involved in cancer development. miRNA mimics, such as miR-34, have been used to inhibit tumor growth, while antagomiRs, such as anti-miR-10b, have been used to inhibit metastasis. The development of epi-drugs that target specific epigenetic changes may lead to more effective monotherapy options in the future.
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Affiliation(s)
- Joanna Szczepanek
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, 87-100 Torun, Poland
| | - Monika Skorupa
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, 87-100 Torun, Poland
- Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, 87-100 Torun, Poland
| | | | - Cezary Cybulski
- International Hereditary Cancer Center, Department of Genetics and Pathology, Pomeranian Medical University, 70-204 Szczecin, Poland
| | - Andrzej Tretyn
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, 87-100 Torun, Poland
- Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, 87-100 Torun, Poland
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Identification of Radiation-Induced miRNA Biomarkers Using the CGL1 Cell Model System. Bioengineering (Basel) 2022; 9:bioengineering9050214. [PMID: 35621492 PMCID: PMC9137836 DOI: 10.3390/bioengineering9050214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/11/2022] [Accepted: 05/14/2022] [Indexed: 11/17/2022] Open
Abstract
MicroRNAs (miRNAs) have emerged as a potential class of biomolecules for diagnostic biomarker applications. miRNAs are small non-coding RNA molecules, produced and released by cells in response to various stimuli, that demonstrate remarkable stability in a wide range of biological fluids, in extreme pH fluctuations, and after multiple freeze–thaw cycles. Given these advantages, identification of miRNA-based biomarkers for radiation exposures can contribute to the development of reliable biological dosimetry methods, especially for low-dose radiation (LDR) exposures. In this study, an miRNAome next-generation sequencing (NGS) approach was utilized to identify novel radiation-induced miRNA gene changes within the CGL1 human cell line. Here, irradiations of 10, 100, and 1000 mGy were performed and the samples were collected 1, 6, and 24 h post-irradiation. Corroboration of the miRNAome results with RT-qPCR verification confirmed the identification of numerous radiation-induced miRNA expression changes at all doses assessed. Further evaluation of select radiation-induced miRNAs, including miR-1228-3p and miR-758-5p, as well as their downstream mRNA targets, Ube2d2, Ppp2r2d, and Id2, demonstrated significantly dysregulated reciprocal expression patterns. Further evaluation is needed to determine whether the candidate miRNA biomarkers identified in this study can serve as suitable targets for radiation biodosimetry applications.
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Oghabi Bakhshaiesh T, Esmaeili R. Effects of noncoding RNAs in radiotherapy response in breast cancer: a systematic review. Cell Cycle 2022; 21:883-893. [PMID: 35108162 PMCID: PMC9037412 DOI: 10.1080/15384101.2022.2035915] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Radiotherapy has an essential role in breast cancer treatment. However, tumor cells may be resistant to radiotherapy. Noncoding RNAs are considered regulators of different pathways which modulate radiotherapy. This systematic review classifies long noncoding RNAs, and microRNAs precipitated in the radiation response of breast cancer patients. A total of 14 microRNAs and 8 long noncoding RNAs were studied in this review. MiR-22, miR-200 c, Let7, and LINP1 as tumor suppressors increase the effect of radiotherapy in BC. However, some noncoding RNAs such as HOTAIR, NEAT1, and miR-21 are precipitated in radio-resistance breast cancers. Significant changes in the pattern of noncoding RNAs expression before and after radiotherapy make them a good candidate for the prognosis and prediction of radiotherapy response. MiR-21 and miR-182 can promote radio-resistance via cancer stem cells. At last, the molecular mechanisms initiating radio-resistance were also examined to find the candidate noncoding RNAs for the development of radiation-sensitized agents.
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Affiliation(s)
| | - Rezvan Esmaeili
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran,CONTACT Rezvan Esmaeili No 146, Gandhi Street, Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
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Wuhrer A, Uhlig S, Tuschy B, Berlit S, Sperk E, Bieback K, Sütterlin M. Wound Fluid from Breast Cancer Patients Undergoing Intraoperative Radiotherapy Exhibits an Altered Cytokine Profile and Impairs Mesenchymal Stromal Cell Function. Cancers (Basel) 2021; 13:2140. [PMID: 33946741 PMCID: PMC8124792 DOI: 10.3390/cancers13092140] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/18/2021] [Accepted: 04/27/2021] [Indexed: 12/16/2022] Open
Abstract
Intraoperative radiotherapy (IORT) displays an increasingly used treatment option for early breast cancer. It exhibits non-inferiority concerning the risk of recurrence compared to conventional external irradiation (EBRT) in suitable patients with early breast cancer. Since most relapses occur in direct proximity of the former tumor site, the reduction of the risk of local recurrence effected by radiotherapy might partially be due to an alteration of the irradiated tumor bed's micromilieu. Our aim was to investigate if IORT affects the local micromilieu, especially immune cells with concomitant cytokine profile, and if it has an impact on growth conditions for breast cancer cells as well as mammary mesenchymal stromal cells (MSC), the latter considered as a model of the tumor bed stroma.42 breast cancer patients with breast-conserving surgery were included, of whom 21 received IORT (IORT group) and 21 underwent surgery without IORT (control group). Drainage wound fluid (WF) was collected from both groups 24 h after surgery for flow cytometric analysis of immune cell subset counts and potential apoptosis and for multiplex cytokine analyses (cytokine array and ELISA). It served further as a supplement in cultures of MDA-MB 231 breast cancer cells and mammary MSC for functional analyses, including proliferation, wound healing and migration. Furthermore, the cytokine profile within conditioned media from WF-treated MSC cultures was assessed. Flow cytometric analysis showed no group-related changes of cell count, activation state and apoptosis rates of myeloid, lymphoid leucocytes and regulatory T cells in the WF. Multiplex cytokine analysis of the WF revealed group-related differences in the expression levels of several cytokines, e.g., oncostatin-M, leptin and IL-1β. The application of WF in MDA-MB 231 cultures did not show a group-related difference in proliferation, wound healing and chemotactic migration. However, WF from IORT-treated patients significantly inhibited mammary MSC proliferation, wound healing and migration compared to WF from the control group. The conditioned media collected from WF-treated MSC-cultures also exhibited altered concentrations of VEGF, RANTES and GROα. IORT causes significant changes in the cytokine profile and MSC growth behavior. These changes in the tumor bed could potentially contribute to the beneficial oncological outcome entailed by this technique. The consideration whether this alteration also affects MSC interaction with other stroma components presents a promising gateway for future investigations.
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Affiliation(s)
- Anne Wuhrer
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (B.T.); (S.B.); (M.S.)
| | - Stefanie Uhlig
- FlowCore Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (S.U.); (K.B.)
| | - Benjamin Tuschy
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (B.T.); (S.B.); (M.S.)
| | - Sebastian Berlit
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (B.T.); (S.B.); (M.S.)
| | - Elena Sperk
- Department of Radiation Oncology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany;
| | - Karen Bieback
- FlowCore Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (S.U.); (K.B.)
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, German Red Cross Blood Donor Services, Heidelberg University, 68167 Mannheim, Germany
- Mannheim Institute for Innate Immunoscience, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany
| | - Marc Sütterlin
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (B.T.); (S.B.); (M.S.)
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6
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Advances in electrochemiluminescence co-reaction accelerator and its analytical applications. Anal Bioanal Chem 2021; 413:4119-4135. [PMID: 33715042 DOI: 10.1007/s00216-021-03247-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/10/2021] [Accepted: 02/22/2021] [Indexed: 10/21/2022]
Abstract
Electrochemiluminescence (ECL) can be produced through two main routes: annihilation route and coreactant route. The vast majority of applications of ECL are based on coreactant ECL which can be generated in aqueous media at relatively low potentials compared with organic solvents. However, the development of more efficient ECL systems remains a compelling goal. Co-reaction accelerator (CRA) can significantly enhance the ECL signal through promoting more production of the coreactant intermediate. Compared with other ECL enhancement strategies, the CRA protocol is distinctive owing to its diverse, simple, and highly effective features. Various species such as inorganic compound, organic compound, and nanomaterials (NMs) have been developed as CRA and NM CRA has gained particular attention owing to their unique properties of excellent catalytic behavior and large surface area. By integration with the inherent advantages of ECL, bioanalysis based on CRA-enhanced ECL showed excellent performance such as ultrahigh sensitivity, wide dynamic range, low cost, simple instrumentation, and measurements in complex media. It has been extensively applied in various fields including clinical diagnosis, environmental monitoring, and food safety. Therefore, it is of great interest to present a systematic and critical review on the advances in ECL CRA. Herein, the recent progress on CRA and its applications in ECL bioanalysis are summarized by illustrating some representative work and a discussion of the future development trends of CRA ECL is offered.
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Pei B, Li T, Qian Q, Fan W, He X, Zhu Y, Xu L. Downregulation of microRNA-30c-5p was responsible for cell migration and tumor metastasis via COTL1-mediated microfilament arrangement in breast cancer. Gland Surg 2020; 9:747-758. [PMID: 32775265 DOI: 10.21037/gs-20-472] [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] [Indexed: 12/20/2022]
Abstract
Background Breast cancer metastasis is the main problem that affects the therapy and prognosis of breast cancer patients. Studies have indicated the role of microRNAs in breast cancer regulation, but the mechanisms are largely unknown. Methods In this study, we determined the expression of microRNA-30c-5p (miR-30c-5p) and coactosin-like protein 1 (COTL1) gene in breast cancer tissues, and revealed their effects on breast cancer metastasis regulation. Breast cancer and paracancerous tissues were collected. Reverse transcriptase polymerase chain reaction (RT-PCR) was used to analyze the expression of miR-30c-5p and COTL1, and breast cancer cell line (MCF-7) was employed to verify the relationship between miR-30c-5p and COTL1. Western blot analysis and immunofluorescence were used for proteins analysis and microfilament observation, respectively. A dual-luciferase reporter gene was used for microRNA-gene interaction assay. Results The results showed that the expression of miR-30c-5p decreased, while the expression of COTL1 increased in breast cancer tissues. The results of luciferase reporting gene assay showed that, COTL1 was the target of miR-30c-5p. After miR-30c-5p was upregulated, the expression of COTL1 was reduced, microfilament arrangement was in disorder, and cell migration ability was inhibited. After miR-30c-5p was downregulated, the expression of COTL1 was increased, and the cell migration ability was enhanced. COTL1 protein expression levels were significantly higher in cancer tissues with lymph node metastasis. Conclusions These findings indicate that miR-30c-5p/COTL1 pathway regulates breast cancer metastasis and can be used as a potential therapy target.
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Affiliation(s)
- Bei Pei
- Changzhou No. 2 People's Hospital, Xinglong Lance, Changzhou, China.,Department of Breast Surgery, Changzhou No. 2 People's Hospital, Changzhou 213003, China
| | | | - Qi Qian
- Changzhou No. 2 People's Hospital, Xinglong Lance, Changzhou, China.,Department of Breast Surgery, Changzhou No. 2 People's Hospital, Changzhou 213003, China
| | - Wenqiang Fan
- Changzhou No. 2 People's Hospital, Xinglong Lance, Changzhou, China.,Department of Breast Surgery, Changzhou No. 2 People's Hospital, Changzhou 213003, China
| | - Xiao He
- Changzhou No. 2 People's Hospital, Xinglong Lance, Changzhou, China.,Department of Breast Surgery, Changzhou No. 2 People's Hospital, Changzhou 213003, China
| | - Yulan Zhu
- Changzhou No. 2 People's Hospital, Xinglong Lance, Changzhou, China.,Department of Breast Surgery, Changzhou No. 2 People's Hospital, Changzhou 213003, China
| | - Lingyun Xu
- Changzhou No. 2 People's Hospital, Xinglong Lance, Changzhou, China.,Department of Breast Surgery, Changzhou No. 2 People's Hospital, Changzhou 213003, China.,Dalian Medical University, Dalian, China
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Yang LW, Wu XJ, Liang Y, Ye GQ, Che YC, Wu XZ, Zhu XJ, Fan HL, Fan XP, Xu JF. miR-155 increases stemness and decitabine resistance in triple-negative breast cancer cells by inhibiting TSPAN5. Mol Carcinog 2020; 59:447-461. [PMID: 32096299 DOI: 10.1002/mc.23167] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 01/20/2020] [Accepted: 01/31/2020] [Indexed: 12/24/2022]
Abstract
Effective therapeutic targets for triple-negative breast cancer (TNBC), a special type of breast cancer (BC) with rapid metastasis and poor prognosis, are lacking, especially for patients with chemotherapy resistance. Decitabine (DCA) is a Food and Drug Administration-approved DNA methyltransferase inhibitor that has been proven effective for the treatment of tumors. However, its antitumor effect in cancer cells is limited by multidrug resistance. Cancer stem cells (CSCs), which are thought to act as seeds during tumor formation, regulate tumorigenesis, metastasis, and drug resistance through complex signaling. Our previous study found that miR-155 is upregulated in BC, but whether and how miR-155 regulates DCA resistance is unclear. In this study, we demonstrated that miR-155 was upregulated in CD24- CD44+ BC stem cells (BCSCs). In addition, the overexpression of miR-155 increased the number of CD24- CD44+ CSCs, DCA resistance and tumor clone formation in MDA-231 and BT-549 BC cells, and knockdown of miR-155 inhibited DCA resistance and stemness in BCSCs in vitro. Moreover, miR-155 induced stemness and DCA resistance by inhibiting the direct target gene tetraspanin-5 (TSPAN5). We further confirmed that overexpression of TSPAN5 abrogated the effect of miR-155 in promoting stemness and DCA resistance in BC cells. Our data show that miR-155 increases stemness and DCA resistance in BC cells by targeting TSPAN5. These data provide a therapeutic strategy and mechanistic basis for future possible clinical applications targeting the miR-155/TSPAN5 signaling axis in the treatment of TNBC.
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Affiliation(s)
- La-Wei Yang
- Clinical Research Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xian-Jin Wu
- Clinical Research Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Department of Clinical Laboratory, Huizhou Municipal Central Hospital, Huizhou, China
| | - Yi Liang
- Clinical Research Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Guang-Qing Ye
- Clinical Research Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yu-Chuang Che
- Department of Clinical Laboratory, Huizhou Municipal Central Hospital, Huizhou, China
| | - Xue-Zhen Wu
- Department of Clinical Laboratory, Huizhou Municipal Central Hospital, Huizhou, China
| | - Xiao-Jie Zhu
- Department of Clinical Laboratory, Huizhou Municipal Central Hospital, Huizhou, China
| | - Huo-Liang Fan
- Department of Clinical Laboratory, Huizhou Municipal Central Hospital, Huizhou, China
| | - Xiang-Ping Fan
- Department of Clinical Laboratory, Huizhou Municipal Central Hospital, Huizhou, China
| | - Jun-Fa Xu
- Department of Clinical Immunology, Guangdong Medical University, Dongguan, China
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9
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Ye WQ, Wei YX, Zhang YZ, Yang CG, Xu ZR. Multiplexed detection of micro-RNAs based on microfluidic multi-color fluorescence droplets. Anal Bioanal Chem 2019; 412:647-655. [PMID: 31836924 DOI: 10.1007/s00216-019-02266-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/12/2019] [Accepted: 11/08/2019] [Indexed: 12/29/2022]
Abstract
In this work, simple, rapid, and low-cost multiplexed detection of tumor-related micro-RNAs (miRNAs) was achieved based on multi-color fluorescence on a microfluidic droplet chip, which simplified the complexity of light path to a half. A four-T-junction structure was fabricated to form uniform nano-volume droplet arrays with customized contents. Multi-color quantum dots (QDs) used as the fluorescence labels were encapsulated into droplets to develop the multi-path fluorescence detection module. We designed an integrated multiplex fluorescence resonance energy transfer system assisted by multiple QDs (four colors) and one quencher to detect four tumor-related miRNAs (miRNA-20a, miRNA-21, miRNA-155, and miRNA-221). The qualitative analysis of miRNAs was realized by the color identification of QDs, while the quantitative detection of miRNAs was achieved based on the linear relationship between the quenching efficiency of QDs and the concentration of miRNAs. The practicability of the multiplex detection device was further confirmed by detecting four tumor-related miRNAs in real human serum samples. The detection limits of four miRNAs ranged from 35 to 39 pmol/L was achieved without any target amplification. And the linear range was from 0.1 nmol/L to 1 μmol/L using 10 nL detection volume (one droplet) under the detection speed of 320 droplets per minute. The multiple detection system for miRNAs is simple, fast, and low-cost and will be a powerful platform for clinical diagnostic analysis. Graphical abstract.
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Affiliation(s)
- Wen-Qi Ye
- Research Center for Analytical Sciences, Northeastern University, 3-11 Wenhua Road, Shenyang, 110819, Liaoning, China
| | - Yi-Xuan Wei
- Research Center for Analytical Sciences, Northeastern University, 3-11 Wenhua Road, Shenyang, 110819, Liaoning, China
| | - Ying-Zhi Zhang
- Research Center for Analytical Sciences, Northeastern University, 3-11 Wenhua Road, Shenyang, 110819, Liaoning, China
| | - Chun-Guang Yang
- Research Center for Analytical Sciences, Northeastern University, 3-11 Wenhua Road, Shenyang, 110819, Liaoning, China.
| | - Zhang-Run Xu
- Research Center for Analytical Sciences, Northeastern University, 3-11 Wenhua Road, Shenyang, 110819, Liaoning, China
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10
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Bradley JA. The current status of intraoperative radiation therapy in breast cancer: Challenges and promises. Breast J 2018; 24:713-714. [PMID: 30221437 DOI: 10.1111/tbj.13071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 05/02/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Julie A Bradley
- Department of Radiation Oncology, University of Florida College of Medicine, Jacksonville, FL, USA
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Liao H, Zhou Y, Chai Y, Yuan R. An ultrasensitive electrochemiluminescence biosensor for detection of MicroRNA by in-situ electrochemically generated copper nanoclusters as luminophore and TiO 2 as coreaction accelerator. Biosens Bioelectron 2018; 114:10-14. [PMID: 29775853 DOI: 10.1016/j.bios.2018.05.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/27/2018] [Accepted: 05/07/2018] [Indexed: 11/28/2022]
Abstract
Herein, we constructed an ultrasensitive electrochemiluminescence (ECL) biosensor for detecting microRNA-21 (miR-21) based on in-situ generation of copper nanoclusters (Cu NCs) as luminophore and titanium dioxide (TiO2) as coreaction accelerator. First, numerous AT-rich double-stranded DNA (dsDNA) was produced from the conversion of a small amount of target miR-21 via the combination of exonuclease III (Exo III)-assisted amplification and hybridization chain reaction (HCR), which could reduce the aggregation-caused self-etching effect of Cu NCs and improve the emitting of Cu NCs. Simultaneously, the introduction of TiO2 in the sensing interface not just acted as the immobilizer of dsDNA-stabilized Cu NCs, more than acted as the coreaction accelerator to accelerate the reduction of the coreaction reagent (S2O82-) for significantly enhancing the ECL efficiency of Cu NCs. The biosensor showed an excellent linear relationship in the concentration range from 100 aM to 100 pM with the detection limit of 19.05 aM Impressively, the strategy not only opened up a novel and efficient preparation method for the Cu NCs, but expanded the application of Cu NCs in ultrasensitive biodetection owing to the addition of coreaction accelerator.
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Affiliation(s)
- Hongxia Liao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemial Engineering, Southwest University, Chongqing 400715, China
| | - Ying Zhou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemial Engineering, Southwest University, Chongqing 400715, China
| | - Yaqin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemial Engineering, Southwest University, Chongqing 400715, China.
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemial Engineering, Southwest University, Chongqing 400715, China.
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