1
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Pei H, Han Z, Du D, Fan Y, Si H, Chang W, Wang Y, Li L, Tang B. Combined Molecular and Morphological Imaging of CTCs for HER2-Targeted Chemotherapy Guidance. Anal Chem 2023; 95:13235-13241. [PMID: 37606014 DOI: 10.1021/acs.analchem.3c02333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Since biomolecules change dynamically with tumor evolution and drug treatment, it is necessary to confirm target molecule expression in real time for effective guidance of subsequent chemotherapy treatment. However, current methods to confirm target proteins require complex processing steps and invasive tissue biopsies, limiting their clinical utility for targeted treatment monitoring. Here, CTCs, as a promising liquid biopsy source, were used to molecularly characterize the target protein HER2. To accurately identify CTCs, we specifically proposed a combined molecular and morphological imaging method, rather than using specific biomarker alone or morphology analysis, we identified CTCs as CK19+/CD45-/HE+. On the basis of the accurate identification of CTCs, we further analyzed the target protein HER2 in clinical patients at the single-CTC level. Comparative analysis of the clinical results of patient pathological tissue and paired blood samples showed that CTCs had a heterogeneous HER2 expression at the single-cell level and showed results inconsistent with the immunohistochemistry results in some cases. CTC-based analysis could help clinicians have a more comprehensive understanding of patient target protein expression. We believe that CTC-based target protein studies are of great significance for the precise management of targeted therapy.
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Affiliation(s)
- Haimeng Pei
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Zhaojun Han
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Dexin Du
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Yuanyuan Fan
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Haibin Si
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Wendi Chang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Yiguo Wang
- Department of Gastroenterology, The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, Shandong 250012, People's Republic of China
| | - Lu Li
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, People's Republic of China
- Laoshan Laboratory,168 Wenhai Middle Road, Aoshanwei Jimo, Qingdao 266237, People's Republic of China
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2
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Photofuel cell-based self-powered biosensor for HER2 detection by integration of plasmonic-metal/conjugated molecule hybrids and electrochemical sandwich structure. Biosens Bioelectron 2023; 220:114850. [DOI: 10.1016/j.bios.2022.114850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/18/2022] [Accepted: 10/21/2022] [Indexed: 11/23/2022]
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3
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Lei Z, Wang Z. Peptide Array-Based In Situ Fluorescence Assay for Profiling Multiple Matrix Metalloproteinase Activities. Methods Mol Biol 2023; 2578:177-189. [PMID: 36152287 DOI: 10.1007/978-1-0716-2732-7_12] [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] [Indexed: 06/16/2023]
Abstract
Peptide array-based in situ fluorescence assay is a reliable and efficient technique for high-throughput profiling and localization of enzyme activity. Here, peptide array is fabricated by spotting five specific MMPs (MMP-2, MMP-3, MMP-7, MMP-9, and MMP-14) peptide substrates containing FAM/Dabcyl fluorescent resonance energy transfer (FRET) pair on the surface of cell monolayers or tissue sections. MMP activities are determined in situ by the fluorescence intensity of stained cells/tissues due to the cellular internalization of hydrolyzed peptide fragments with FAM moieties. Identification of MMP expression patterns of cells, highly sensitive determination of MMP activities in cell monolayer (as low as hundreds of cells per square centimeter), and evaluation of inhibition potencies of six compounds toward five MMPs are achieved by this method. Five MMP activities in the localized parts of 32 thyroid tissues are also well profiled without separation or extraction procedures.
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Affiliation(s)
- Zhen Lei
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, China
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Zhenxin Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, China.
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4
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Cho CH, Cho M, Park JK. Biomarker barcodes: multiplexed microfluidic immunohistochemistry enables high-throughput analysis of tissue microarray. LAB ON A CHIP 2021; 21:3471-3482. [PMID: 34263282 DOI: 10.1039/d1lc00375e] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We present a multiplexed microfluidic immunohistochemistry (IHC) technology that enables high-throughput analysis of tissue microarrays (TMAs) using the patterns of biomarker barcodes, which consist of a series of expressed linear patterns of specific biomarkers. A multichannel poly(dimethylsiloxane) microfluidic device was reversibly assembled by the pressure of simple equipment for multiplexed IHC on each core of TMA or cell microarray (CMA) section slides. By injecting primary antibodies from different biomarkers independently into each channel, multiplexed immunostaining can be performed on each core of TMA. We confirmed the equal immunostaining quality regardless of the channel orders and core positions in the slide. Four different biomarkers (ER, PR, HER2, and Ki67) were used for the demonstration of distinctive expression patterns on CMAs which consist of six different breast cancer cell lines, and it was confirmed that these bar-like signals could be a biomarker barcode for the TMA core. A biomarker barcode of breast cancer patient-derived TMA was quickly scanned by a slide scanner and compared to the conventional method for breast cancer diagnosis. This "barcode-IHC" concept, which has been verified by performing multiplexed microfluidic IHC on CMA and TMA samples, provides high reproducibility and the potential of high-throughput screening with molecular diagnostic capability.
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Affiliation(s)
- Chang Hyun Cho
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - Minkyung Cho
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - Je-Kyun Park
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
- KAIST Institute for Health Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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5
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Oh J, Carlson JCT, Landeros C, Lee H, Ferguson S, Faquin WC, Clark JR, Pittet MJ, Pai SI, Weissleder R. Rapid Serial Immunoprofiling of the Tumor Immune Microenvironment by Fine Needle Sampling. Clin Cancer Res 2021; 27:4781-4793. [PMID: 34233961 PMCID: PMC8416923 DOI: 10.1158/1078-0432.ccr-21-1252] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/19/2021] [Accepted: 06/30/2021] [Indexed: 01/22/2023]
Abstract
PURPOSE There is increasing effort to discover and integrate predictive and/or prognostic biomarkers into treatment algorithms. While tissue-based methods can reveal tumor-immune cell compositions at a single time point, we propose that single-cell sampling via fine needle aspiration (FNA) can facilitate serial assessment of the tumor immune microenvironment (TME) with a favorable risk-benefit profile. EXPERIMENTAL DESIGN Primary antibodies directed against 20 murine and 25 human markers of interest were chemically modified via a custom linker-bio-orthogonal quencher (FAST) probe. A FAST-FNA cyclic imaging and analysis pipeline were developed to derive quantitative response scores. Single cells were harvested via FNA and characterized phenotypically and functionally both in preclinical and human samples using the newly developed FAST-FNA assay. RESULTS FAST-FNA samples analyzed manually versus the newly developed deep learning-assisted pipeline gave highly concordant results. Subsequently, an agreement analysis showed that FAST and flow cytometry of surgically resected tumors were positively correlated with an R2 = 0.97 in preclinical samples and an R2 = 0.86 in human samples with the detection of the relevant tumor and immune biomarkers of interest. Finally, the feasibility of applying this minimally invasive approach to analyze the TME during immunotherapy was assessed in patients with cancer revealing local antitumor immune programs. CONCLUSIONS The FAST-FNA is an innovative technology that combines bio-orthogonal chemistry coupled with a computational analysis pipeline for the comprehensive profiling of single cells obtained through FNA. This is the first demonstration that the complex and rapidly evolving TME during treatment can be accurately and serially measured by simple FNA.
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Affiliation(s)
- Juhyun Oh
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
| | - Jonathan C T Carlson
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard Cancer Center, Massachusetts General Hospital, Boston, Massachusetts
| | - Christian Landeros
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
- Harvard-MIT Program in Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Hakho Lee
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
| | - Scott Ferguson
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
| | - William C Faquin
- Division of Head and Neck Pathology, Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - John R Clark
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard Cancer Center, Massachusetts General Hospital, Boston, Massachusetts
| | - Mikael J Pittet
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
- Harvard Cancer Center, Massachusetts General Hospital, Boston, Massachusetts
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
- Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
| | - Sara I Pai
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
- Harvard Cancer Center, Massachusetts General Hospital, Boston, Massachusetts
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Department of Otolaryngology, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard Cancer Center, Massachusetts General Hospital, Boston, Massachusetts
- Division of Interventional Radiology, Department of Radiology Massachusetts General Hospital, Boston, Massachusetts
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts
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6
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Momenbeitollahi N, Cloet T, Li H. Pushing the detection limits: strategies towards highly sensitive optical-based protein detection. Anal Bioanal Chem 2021; 413:5995-6011. [PMID: 34363087 PMCID: PMC8346249 DOI: 10.1007/s00216-021-03566-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 01/07/2023]
Abstract
Proteins are one of the main constituents of living cells. Studying the quantities of proteins under physiological and pathological conditions can give valuable insights into health status, since proteins are the functional molecules of life. To be able to detect and quantify low-abundance proteins in biofluids for applications such as early disease diagnostics, sensitive analytical techniques are desired. An example of this application is using proteins as biomarkers for detecting cancer or neurological diseases, which can provide early, lifesaving diagnoses. However, conventional methods for protein detection such as ELISA, mass spectrometry, and western blotting cannot offer enough sensitivity for certain applications. Recent advances in optical-based micro- and nano-biosensors have demonstrated promising results to detect proteins at low quantities down to the single-molecule level, shining lights on their capacities for ultrasensitive disease diagnosis and rare protein detection. However, to date, there is a lack of review articles synthesizing and comparing various optical micro- and nano-sensing methods of enhancing the limits of detections of the antibody-based protein assays. The purpose of this article is to critically review different strategies of improving assay sensitivity using miniaturized biosensors, such as assay miniaturization, improving antibody binding capacity, sample purification, and signal amplification. The pros and cons of different methods are compared, and the future perspectives of this research field are discussed.
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Affiliation(s)
| | - Teran Cloet
- School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Huiyan Li
- School of Engineering, University of Guelph, Guelph, Ontario, N1G 2W1, Canada.
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7
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Fredman G, Skov L, Mann M, Dyring-Andersen B. Towards Precision Dermatology: Emerging Role of Proteomic Analysis of the Skin. Dermatology 2021; 238:185-194. [PMID: 34062531 DOI: 10.1159/000516764] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 04/21/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The skin is the largest organ in the human body and serves as a multilayered protective shield from the environment as well as a sensor and thermal regulator. However, despite its importance, many details about skin structure and function at the molecular level remain incompletely understood. Recent advances in liquid chromatography tandem mass spectrometry (LC-MS/MS) proteomics have enabled the quantification and characterization of the proteomes of a number of clinical samples, including normal and diseased skin. SUMMARY Here, we review the current state of the art in proteomic analysis of the skin. We provide a brief overview of the technique and skin sample collection methodologies as well as a number of recent examples to illustrate the utility of this strategy for advancing a broader understanding of the pathology of diseases as well as new therapeutic options. Key Messages: Proteomic studies of healthy skin and skin diseases can identify potential molecular biomarkers for improved diagnosis and patient stratification as well as potential targets for drug development. Collectively, efforts such as the Human Skinatlas offer improved opportunities for enhancing clinical practice and patient outcomes.
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Affiliation(s)
- Gabriella Fredman
- Department of Dermatology and Allergy, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Lone Skov
- Department of Dermatology and Allergy, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Matthias Mann
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark.,Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Beatrice Dyring-Andersen
- Department of Dermatology and Allergy, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark.,Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark.,Leo Foundation Skin Immunology Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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8
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Liu M, Xu Y, Zhou Y, Lang R, Shi Z, Zhao J, Meng Y, Bao L. Integrated Analyses Reveal the Multi-Omics and Prognostic Characteristics of ATP5B in Breast Cancer. Front Genet 2021; 12:652474. [PMID: 34122507 PMCID: PMC8194306 DOI: 10.3389/fgene.2021.652474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/19/2021] [Indexed: 11/13/2022] Open
Abstract
The beta subunit of F1Fo-ATP synthase (ATP5B) has been demonstrated to play an essential role in tumor progression and metastasis. However, there has been no comprehensive pan-cancer multi-omics analysis of ATP5B, while the clinical relevance of ATP5B and its potential mechanism in regulating breast cancer are still poorly understood. In this study, we demonstrated that ATP5B has a higher frequency of amplification than deletion in most cancer types, and the copy number variation (CNV) of ATP5B was significantly positively correlated with its mRNA expression level. DNA methylation analysis across pan-cancer also revealed a strong correlation between ATP5B expression and epigenetic changes. We identified 6 significant methylation sites involved in the regulation of ATP5B expression. Tissue microarrays (TMA) from 129 breast cancer samples, integrated with multiple additional breast cancer dataset, were used to evaluate the ATP5B expression and its correlation with prognosis. Higher levels of ATP5B expression were consistently associated with a worse OS in all datasets, and Cox regression analysis suggested that ATP5B expression was an independent prognostic factor. Gene enrichment analysis indicated that the gene signatures of DNA damage recognition, the E-cadherin nascent pathway and the PLK1 pathway were enriched in ATP5B-high patients. Moreover, somatic mutation analysis showed that a significant different mutation frequency of CDH1 and ADAMTSL3 could be observed between the ATP5B-high and ATP5B-low groups. In conclusion, this study reveals novel significance regarding the genetic characteristics and clinical value of ATP5B highlighted in predicting the outcome of breast cancer patients.
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Affiliation(s)
- Min Liu
- Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China.,The Graduate School, Tianjin Medical University, Tianjin, China
| | - Yuxuan Xu
- Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China.,The Graduate School, Tianjin Medical University, Tianjin, China
| | - Yaoyao Zhou
- Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China.,The Graduate School, Tianjin Medical University, Tianjin, China
| | - Ronggang Lang
- Department of Breast Cancer Pathology and Research Laboratory, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China
| | - Zhenyu Shi
- Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China
| | - Jing Zhao
- Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China
| | - Yuanyuan Meng
- Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China.,The Graduate School, Tianjin Medical University, Tianjin, China
| | - Li Bao
- Key Laboratory of Cancer Prevention and Therapy, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Tianjin, China
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9
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Li H, Zhao S, Shen L, Wang P, Liu S, Ma Y, Liang Z, Wang G, Lv J, Qiu W. E2F2 inhibition induces autophagy via the PI3K/Akt/mTOR pathway in gastric cancer. Aging (Albany NY) 2021; 13:13626-13643. [PMID: 34091441 PMCID: PMC8202834 DOI: 10.18632/aging.202891] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/14/2021] [Indexed: 12/24/2022]
Abstract
Background: E2F2 is a member of the E2F transcription factor family and has important but not fully understood biological functions in cancers. The biological role of E2F2 in gastric cancer (GC) also remains unclear. Methods: We examined the expression levels of E2F2 in GC using publicly available datasets such as TIMER, Oncomine, GEPIA, UALCAN, etc., and in our patient cohort, using quantitative real-time PCR, western blotting, and immunohistochemistry. We further investigated the effects of E2F2 on phosphatidylinositol 3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) signaling, autophagy, and the migration and invasion of GC cells by the wound healing assay, Transwell assay and transmission electron microscopy. Results: E2F2 was highly expressed in both GC tissues and cells compared with normal gastric tissues/cells. High E2F2 expression was associated with poor overall survival (OS). In addition, the expression of E2F2 in GC was strongly correlated with a variety of immune markers. E2F2 overexpression promoted the migration and invasiveness of GC cells in vitro through inhibition of PI3K/Akt/mTOR-mediated autophagy. Conclusion: High E2F2 expression was associated with the characteristics of invasive tumors and poor prognosis. E2F2 also had potential modulatory effects on tumor immunity. We discovered a novel function of E2F2 in the regulation of PI3K/Akt/mTOR-mediated autophagy and the downstream processes of cell migration and invasion.
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Affiliation(s)
- Hui Li
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Shufen Zhao
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Liwei Shen
- Department of Oncology, Qingdao Women and Children's Hospital, Qingdao, Shandong, China
| | - Peige Wang
- Department of Emergency Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Shihai Liu
- Central Laboratory, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yingji Ma
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Zhiwei Liang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Gongjun Wang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Jing Lv
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Wensheng Qiu
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
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10
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Lei Z, Jian M, Wei J, Wang Y, Meng X, Wang Z. Array-based in situ fluorescence assay for profiling multiplex matrix metalloproteinases activities in tissue section. Anal Chim Acta 2019; 1078:112-118. [DOI: 10.1016/j.aca.2019.05.071] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 05/26/2019] [Accepted: 05/29/2019] [Indexed: 12/25/2022]
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11
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Tentori AM, Nagarajan MB, Kim JJ, Zhang WC, Slack FJ, Doyle PS. Quantitative and multiplex microRNA assays from unprocessed cells in isolated nanoliter well arrays. LAB ON A CHIP 2018; 18:2410-2424. [PMID: 29998262 PMCID: PMC6081239 DOI: 10.1039/c8lc00498f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
MicroRNAs (miRNAs) have recently emerged as promising biomarkers for the profiling of diseases. Translation of miRNA biomarkers to clinical practice, however, remains a challenge due to the lack of analysis platforms for sensitive, quantitative, and multiplex miRNA assays that have simple and robust workflows suitable for translation. The platform we present here utilizes functionalized hydrogel posts contained within isolated nanoliter well reactors for quantitative and multiplex assays directly from unprocessed cell samples without the need of prior nucleic acid extraction. Simultaneous reactor isolation and delivery of miRNA extraction reagents is achieved by sealing an array of wells containing the functionalized hydrogel posts and cells against another array of wells containing lysis and extraction reagents. The nanoliter well array platform features >100× better sensitivity compared to previous technology utilizing hydrogel particles without relying on signal amplification and enables >100 parallel assays in a single device. These advances provided by this platform lay the groundwork for translatable and robust analysis technologies for miRNA expression profiling in samples with small populations of cells and in precious, material-limited samples.
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Affiliation(s)
- Augusto M. Tentori
- Department of Chemical Engineering
, Massachusetts Institute of Technology
,
Cambridge
, USA
.
; Tel: +1 617 253 4534
| | - Maxwell B. Nagarajan
- Department of Chemical Engineering
, Massachusetts Institute of Technology
,
Cambridge
, USA
.
; Tel: +1 617 253 4534
| | - Jae Jung Kim
- Department of Chemical Engineering
, Massachusetts Institute of Technology
,
Cambridge
, USA
.
; Tel: +1 617 253 4534
| | - Wen Cai Zhang
- Department of Pathology
, Beth Israel Deaconess Medical Center/Harvard Medical School
,
Boston
, USA
| | - Frank J. Slack
- Department of Pathology
, Beth Israel Deaconess Medical Center/Harvard Medical School
,
Boston
, USA
| | - Patrick S. Doyle
- Department of Chemical Engineering
, Massachusetts Institute of Technology
,
Cambridge
, USA
.
; Tel: +1 617 253 4534
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