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Xia X, Jiang M, Lin C, Ke R. Visualization of Individual RNA Molecules by Proximity Ligation-Based Chromogenic In Situ Hybridization Assay. Methods Mol Biol 2024; 2822:143-156. [PMID: 38907917 DOI: 10.1007/978-1-0716-3918-4_11] [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: 06/24/2024]
Abstract
RNA in situ hybridization reveals the abundance and location of gene expression in cells or tissues, providing a technical basis for the clinical diagnosis of diseases. In this chapter, we show a "V" shape probe-mediated single-molecule chromogenic in situ hybridization (vsmCISH) technique for bright-field visualization of individual RNA molecules. In our method, several pairs of target hybridization probes are hybridized to RNA molecules and each probe pair forms a "V" shape overhang. The overhang oligonucleotides then mediated the proximity ligation to form DNA circles, followed by rolling circle amplification for signal enhancement and enzyme-catalyzed chromogenic reaction-based readout. The colorimetric assay avoids problems such as photobleaching and autofluorescence of current fluorescent in situ hybridization-based single-molecule RNA detection techniques. Furthermore, the relatively straightforward protocol makes the method useful for biological research and clinical diagnosis applications.
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Affiliation(s)
- Xueqian Xia
- School of Medicine, Huaqiao University, Xiamen, Fujian, China
| | - Meng Jiang
- School of Medicine, Huaqiao University, Xiamen, Fujian, China
- College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Chen Lin
- School of Medicine, Huaqiao University, Xiamen, Fujian, China
| | - Rongqin Ke
- School of Medicine, Huaqiao University, Xiamen, Fujian, China.
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2
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Jiang M, Wei K, Li M, Lin C, Ke R. Single-molecule RNA in situ detection in clinical FFPE tissue sections by vsmCISH. RNA (NEW YORK, N.Y.) 2023; 29:836-846. [PMID: 36813533 PMCID: PMC10187679 DOI: 10.1261/rna.079482.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 02/05/2023] [Indexed: 05/18/2023]
Abstract
Although RNA plays a vital role in gene expression, it is less used as an in situ biomarker for clinical diagnostics than DNA and protein. This is mainly due to technical challenges caused by the low expression level and easy degradation of RNA molecules. To tackle this issue, methods that are sensitive and specific are needed. Here, we present an RNA single-molecule chromogenic in situ hybridization assay based on DNA probe proximity ligation and rolling circle amplification. When the DNA probes hybridize into close proximity to the RNA molecules, they form a V-shape structure and mediate the circularization of circle probes. Thus, our method was termed vsmCISH. We successfully applied our method to assess HER2 mRNA expression status in invasive breast cancer tissue and investigated the utility of albumin mRNA ISH for differentiating primary from metastatic liver cancer. The promising results on clinical samples indicate that our method has great potential for application in diagnosing diseases using RNA biomarkers.
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Affiliation(s)
- Meng Jiang
- School of Medicine, Huaqiao University, Quanzhou, Fujian, China
- College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Kaipeng Wei
- Department of Pathology, The 910 Hospital, Quanzhou, Fujian, China
| | - Meiqing Li
- Department of Pathology, Women and Children's Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Chen Lin
- School of Medicine, Huaqiao University, Quanzhou, Fujian, China
| | - Rongqin Ke
- School of Medicine, Huaqiao University, Quanzhou, Fujian, China
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3
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Pérez-Santos I, García-Cabezas MÁ, Cavada C. Mapping the primate thalamus: systematic approach to analyze the distribution of subcortical neuromodulatory afferents. Brain Struct Funct 2023:10.1007/s00429-023-02619-w. [PMID: 36890350 DOI: 10.1007/s00429-023-02619-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 02/09/2023] [Indexed: 03/10/2023]
Abstract
Neuromodulatory afferents to thalamic nuclei are key for information transmission and thus play critical roles in sensory, motor, and limbic processes. Over the course of the last decades, diverse attempts have been made to map and describe subcortical neuromodulatory afferents to the primate thalamus, including axons using acetylcholine, serotonin, dopamine, noradrenaline, adrenaline, and histamine. Our group has been actively involved in this endeavor. The published descriptions on neuromodulatory afferents to the primate thalamus have been made in different laboratories and are not fully comparable due to methodological divergences (for example, fixation procedures, planes of cutting, techniques used to detect the afferents, different criteria for identification of thalamic nuclei…). Such variation affects the results obtained. Therefore, systematic methodological and analytical approaches are much needed. The present article proposes reproducible methodological and terminological frameworks for primate thalamic mapping. We suggest the use of standard stereotaxic planes to produce and present maps of the primate thalamus, as well as the use of the Anglo-American school terminology (vs. the German school terminology) for identification of thalamic nuclei. Finally, a public repository of the data collected under agreed-on frameworks would be a useful tool for looking up and comparing data on the structure and connections of primate thalamic nuclei. Important and agreed-on efforts are required to create, manage, and fund a unified and homogeneous resource of data on the primate thalamus. Likewise, a firm commitment of the institutions to preserve experimental brain material is much needed because neuroscience work with non-human primates is becoming increasingly rare, making earlier material still more valuable.
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Affiliation(s)
- Isabel Pérez-Santos
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Facultad de Medicina, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo 4, 28029, Madrid, Spain.,PhD Program in Neuroscience, Universidad Autónoma de Madrid-Cajal, Madrid, Spain
| | - Miguel Ángel García-Cabezas
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Facultad de Medicina, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo 4, 28029, Madrid, Spain.,PhD Program in Neuroscience, Universidad Autónoma de Madrid-Cajal, Madrid, Spain.,Neural Systems Laboratory, Department of Health Sciences, Boston University, Boston, MA, USA
| | - Carmen Cavada
- Department of Anatomy, Histology and Neuroscience, School of Medicine, Facultad de Medicina, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo 4, 28029, Madrid, Spain. .,PhD Program in Neuroscience, Universidad Autónoma de Madrid-Cajal, Madrid, Spain.
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4
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Zweyer M, Ohlendieck K, Swandulla D. Verification of Protein Changes Determined by 2D-DIGE Based Proteomics Using Immunofluorescence Microscopy. Methods Mol Biol 2023; 2596:445-464. [PMID: 36378456 DOI: 10.1007/978-1-0716-2831-7_30] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Fluorescence two-dimensional difference gel electrophoresis (2D-DIGE) is a key biochemical method for the comparative analysis of complex protein mixtures. The technique focuses on the identification and characterization of individual protein species following gel electrophoretic separation making it an important analytical tool of top-down proteomics. In order to verify changes in the expression levels of a particular protein, as determined by 2D-DIGE analysis, and evaluate the subcellular localization of the proteoform of interest, immunofluorescence microscopy is very well suited. This chapter describes in detail the preparation of tissue specimens and the process of cryo-sectioning, as well as incubation with primary antibodies and fluorescently labeled secondary antibodies, followed by image analysis. As illustrative examples, the co-detection of immuno-labeled dystrophin and the Y-chromosome in skeletal muscle are shown, and the localization of calbindin in the cerebellum is presented.
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Affiliation(s)
- Margit Zweyer
- Department of Neonatology and Pediatric Intensive Care, Children's Hospital, University of Bonn, Bonn, Germany
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Bonn, Germany
| | - Kay Ohlendieck
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland
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5
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Li Q, Zhang X, Ke R. Spatial Transcriptomics for Tumor Heterogeneity Analysis. Front Genet 2022; 13:906158. [PMID: 35899203 PMCID: PMC9309247 DOI: 10.3389/fgene.2022.906158] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 05/31/2022] [Indexed: 12/12/2022] Open
Abstract
The molecular heterogeneity of cancer is one of the major causes of drug resistance that leads to treatment failure. Thus, better understanding the heterogeneity of cancer will contribute to more precise diagnosis and improved patient outcomes. Although single-cell sequencing has become an important tool for investigating tumor heterogeneity recently, it lacks the spatial information of analyzed cells. In this regard, spatial transcriptomics holds great promise in deciphering the complex heterogeneity of cancer by providing localization-indexed gene expression information. This study reviews the applications of spatial transcriptomics in the study of tumor heterogeneity, discovery of novel spatial-dependent mechanisms, tumor immune microenvironment, and matrix microenvironment, as well as the pathological classification and prognosis of cancer. Finally, future challenges and opportunities for spatial transcriptomics technology’s applications in cancer are also discussed.
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6
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Nikovics K, Durand M, Castellarin C, Burger J, Sicherre E, Collombet JM, Oger M, Holy X, Favier AL. Macrophages Characterization in an Injured Bone Tissue. Biomedicines 2022; 10:biomedicines10061385. [PMID: 35740407 PMCID: PMC9219779 DOI: 10.3390/biomedicines10061385] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 06/08/2022] [Indexed: 11/16/2022] Open
Abstract
Biomaterial use is a promising approach to facilitate wound healing of the bone tissue. Biomaterials induce the formation of membrane capsules and the recruitment of different types of macrophages. Macrophages are immune cells that produce diverse combinations of cytokines playing an important role in bone healing and regeneration, but the exact mechanism remains to be studied. Our work aimed to identify in vivo macrophages in the Masquelet induced membrane in a rat model. Most of the macrophages in the damaged area were M2-like, with smaller numbers of M1-like macrophages. In addition, high expression of IL-1β and IL-6 cytokines were detected in the membrane region by RT-qPCR. Using an innovative combination of two hybridization techniques (in situ hybridization and in situ hybridization chain reaction (in situ HCR)), M2b-like macrophages were identified for the first time in cryosections of non-decalcified bone. Our work has also demonstrated that microspectroscopical analysis is essential for macrophage characterization, as it allows the discrimination of fluorescence and autofluorescence. Finally, this work has revealed the limitations of immunolabelling and the potential of in situ HCR to provide valuable information for in vivo characterization of macrophages.
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Affiliation(s)
- Krisztina Nikovics
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (C.C.); (E.S.); (M.O.); (A.-L.F.)
- Correspondence: or ; Tel.: +33-(0)-1-78-65-13-331
| | - Marjorie Durand
- Osteo-Articulary Biotherapy Unit, Department of Medical and Surgical Assistance to the Armed Forces, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (M.D.); (J.-M.C.)
| | - Cédric Castellarin
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (C.C.); (E.S.); (M.O.); (A.-L.F.)
| | - Julien Burger
- Microbiology and Infectious Diseases Department, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France;
| | - Emma Sicherre
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (C.C.); (E.S.); (M.O.); (A.-L.F.)
| | - Jean-Marc Collombet
- Osteo-Articulary Biotherapy Unit, Department of Medical and Surgical Assistance to the Armed Forces, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (M.D.); (J.-M.C.)
| | - Myriam Oger
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (C.C.); (E.S.); (M.O.); (A.-L.F.)
| | - Xavier Holy
- Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France;
| | - Anne-Laure Favier
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (C.C.); (E.S.); (M.O.); (A.-L.F.)
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7
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In Situ Gene Expression in Native Cryofixed Bone Tissue. Biomedicines 2022; 10:biomedicines10020484. [PMID: 35203694 PMCID: PMC8962289 DOI: 10.3390/biomedicines10020484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/09/2022] [Accepted: 02/15/2022] [Indexed: 01/21/2023] Open
Abstract
Bone is a very complex tissue that is constantly changing throughout the lifespan. The precise mechanism of bone regeneration remains poorly understood. Large bone defects can be caused by gunshot injury, trauma, accidents, congenital anomalies and tissue resection due to cancer. Therefore, understanding bone homeostasis and regeneration has considerable clinical and scientific importance in the development of bone therapy. Macrophages are well known innate immune cells secreting different combinations of cytokines and their role in bone regeneration during bone healing is essential. Here, we present a method to identify mRNA transcripts in cryosections of non-decalcified rat bone using in situ hybridization and hybridization chain reaction to explore gene expression in situ for better understanding the gene expression of the bone tissues.
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8
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Shandilya R, Kumari R, Singh RD, Chouksey A, Bhargava A, Goryacheva IY, Mishra PK. Gold based nano-photonic approach for point-of-care detection of circulating long non-coding RNAs. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 36:102413. [PMID: 34147663 DOI: 10.1016/j.nano.2021.102413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 05/06/2021] [Accepted: 06/10/2021] [Indexed: 10/21/2022]
Abstract
Development of a rapid, sensitive and easy to use point of care assay for detection of circulating long non-coding RNAs (lncRNAs) is of great importance. These biomolecules possess the ability to regulate vital cellular processes and act as biomarkers for various human non-communicable diseases. The present work aimed to develop a simplified and reliable cytometric fluorescence-based approach for precise recognition of circulating lncRNAs in a given sample using biotinylated uracil-modified oligonucleotide tethered AlexaFluor488-labeled streptavidin gold colloidal (BiO-StrAG) nano-conjugates. The fluorophores in close proximity to the gold nanoparticles result in quenching of fluorescence; however, specific recognition of target lncRNAs increases this distance which causes plasmonic enhancement of fluorescence. As per the flow cytometry and fluorometry investigations, the developed methodology provides a precise and sensitive approach for detection of the target lncRNAs (up to 5 nM in any given sample). With advantages of high selectivity and feasibility, our strategy offers great potential of being developed as a promising tool for interrogating aberrant regulation of lncRNAs functions, especially indicated in various diseased states.
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Affiliation(s)
- Ruchita Shandilya
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Roshani Kumari
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Radha Dutt Singh
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Anju Chouksey
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Arpit Bhargava
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Irina Yu Goryacheva
- Department of General and Inorganic Chemistry, Saratov State University, Saratov, Russia
| | - Pradyumna Kumar Mishra
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India.
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9
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Supadmanaba IGP, Mantini G, Randazzo O, Capula M, Muller IB, Cascioferro S, Diana P, Peters GJ, Giovannetti E. Interrelationship between miRNA and splicing factors in pancreatic ductal adenocarcinoma. Epigenetics 2021; 17:381-404. [PMID: 34057028 PMCID: PMC8993068 DOI: 10.1080/15592294.2021.1916697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers because of diagnosis at late stage and inherent/acquired chemoresistance. Recent advances in genomic profiling and biology of this disease have not yet been translated to a relevant improvement in terms of disease management and patient’s survival. However, new possibilities for treatment may emerge from studies on key epigenetic factors. Deregulation of microRNA (miRNA) dependent gene expression and mRNA splicing are epigenetic processes that modulate the protein repertoire at the transcriptional level. These processes affect all aspects of PDAC pathogenesis and have great potential to unravel new therapeutic targets and/or biomarkers. Remarkably, several studies showed that they actually interact with each other in influencing PDAC progression. Some splicing factors directly interact with specific miRNAs and either facilitate or inhibit their expression, such as Rbfox2, which cleaves the well-known oncogenic miRNA miR-21. Conversely, miR-15a-5p and miR-25-3p significantly downregulate the splicing factor hnRNPA1 which acts also as a tumour suppressor gene and is involved in processing of miR-18a, which in turn, is a negative regulator of KRAS expression. Therefore, this review describes the interaction between splicing and miRNA, as well as bioinformatic tools to explore the effect of splicing modulation towards miRNA profiles, in order to exploit this interplay for the development of innovative treatments. Targeting aberrant splicing and deregulated miRNA, alone or in combination, may hopefully provide novel therapeutic approaches to fight the complex biology and the common treatment recalcitrance of PDAC.
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Affiliation(s)
- I Gede Putu Supadmanaba
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, VU University Medical Center (VUMC), Amsterdam, The Netherlands.,Biochemistry Department, Faculty of Medicine, Universitas Udayana, Denpasar, Bali, Indonesia
| | - Giulia Mantini
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, VU University Medical Center (VUMC), Amsterdam, The Netherlands.,Cancer Pharmacology Lab, AIRC Start up Unit, Fondazione Pisana per La Scienza, Pisa, Italy
| | - Ornella Randazzo
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, VU University Medical Center (VUMC), Amsterdam, The Netherlands.,Dipartimento Di Scienze E Tecnologie Biologiche Chimiche E Farmaceutiche (STEBICEF), Università Degli Studi Di Palermo, Palermo, Italy
| | - Mjriam Capula
- Cancer Pharmacology Lab, AIRC Start up Unit, Fondazione Pisana per La Scienza, Pisa, Italy.,Institute of Life Sciences, Sant'Anna School of Advanced Studies, Pisa, Italy
| | - Ittai B Muller
- Department of Clinical Chemistry, Amsterdam UMC, VU University Medical Center (VUMC), Amsterdam, The Netherlands
| | - Stella Cascioferro
- Dipartimento Di Scienze E Tecnologie Biologiche Chimiche E Farmaceutiche (STEBICEF), Università Degli Studi Di Palermo, Palermo, Italy
| | - Patrizia Diana
- Dipartimento Di Scienze E Tecnologie Biologiche Chimiche E Farmaceutiche (STEBICEF), Università Degli Studi Di Palermo, Palermo, Italy
| | - Godefridus J Peters
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, VU University Medical Center (VUMC), Amsterdam, The Netherlands.,Department of Biochemistry, Medical University of Gdansk, Poland
| | - Elisa Giovannetti
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, VU University Medical Center (VUMC), Amsterdam, The Netherlands.,Cancer Pharmacology Lab, AIRC Start up Unit, Fondazione Pisana per La Scienza, Pisa, Italy
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10
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Sicherre E, Favier AL, Riccobono D, Nikovics K. Non-Specific Binding, a Limitation of the Immunofluorescence Method to Study Macrophages In Situ. Genes (Basel) 2021; 12:649. [PMID: 33925331 PMCID: PMC8145419 DOI: 10.3390/genes12050649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/20/2021] [Accepted: 04/26/2021] [Indexed: 12/24/2022] Open
Abstract
Advances in understanding tissue regenerative mechanisms require the characterization of in vivo macrophages as those play a fundamental role in this process. This characterization can be approached using the immuno-fluorescence method with widely studied and used pan-markers such as CD206 protein. This work investigated CD206 expression in an irradiated-muscle pig model using three different antibodies. Surprisingly, the expression pattern during immunodetection differed depending on the antibody origin and could give some false results. False results are rarely described in the literature, but this information is essential for scientists who need to characterize macrophages. In this context, we showed that in situ hybridization coupled with hybridization-chain-reaction detection (HCR) is an excellent alternative method to detect macrophages in situ.
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Affiliation(s)
- Emma Sicherre
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (E.S.); (A.-L.F.)
| | - Anne-Laure Favier
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (E.S.); (A.-L.F.)
| | - Diane Riccobono
- Radiobiology Unit, Department of NRBC Defence, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France;
| | - Krisztina Nikovics
- Imagery Unit, Department of Platforms and Technology Research, French Armed Forces Biomedical Research Institute, 91223 Brétigny-sur-Orge, France; (E.S.); (A.-L.F.)
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11
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Shiyanbola O, Hardin H, Hu R, Eickhoff JC, Lloyd RV. Long Noncoding RNA Expression in Adrenal Cortical Neoplasms. Endocr Pathol 2020; 31:385-391. [PMID: 32725507 DOI: 10.1007/s12022-020-09642-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/22/2020] [Indexed: 12/29/2022]
Abstract
Long noncoding RNAs (lncRNAs) consist of nucleic acid molecules that are greater than 200 nucleotides in length and they do not code for specific proteins. A growing body of evidence indicates that these lncRNAs have important roles in tumorigenesis. Separating adrenal cortical adenomas from carcinomas is often a difficult problem for the surgical pathologist. This is especially true when only small needle biopsies are available for examination. We used in situ hybridization (ISH) analysis to study normal adrenal cortical tissues and adrenal cortical tumors to determine the role of specific lncRNAs in tumor development and classification. The lncRNAS studied included metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), psoriasis susceptibility-related RNA gene induced by stress (PRINS), and HOX antisense intergenic RNA myeloid 1 (HAM1). We constructed a tissue microarray (TMA) for the studies and also analyzed a subset of cases by quantitative reverse transcriptase polymerase chain reaction (qRT-PCR). Two 1-mm duplicate cores of normal adrenal cortex (NAC) (n = 23), adrenal cortical adenomas (ACAs) (n = 95), and adrenal cortical carcinomas (ACCs), (n = 20) were used on the TMA. The results of ISH were analyzed by image analysis. ISH showed predominantly nuclear expression of lncRNAs in adrenal cortical tissues. MALAT1 showed more expression in ACCs than in NAC and ACA (p < 0.05). PRINS had higher expression in NACs and ACAs than in ACCs. The lncRNAs MALAT1, PRINS, and HAM1 are all expressed in normal and neoplastic adrenal cortical tissues. MALAT1 had the highest expression in ACC compared to ACAs and may have a role in ACC development.
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Affiliation(s)
- Oyewale Shiyanbola
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Heather Hardin
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Rong Hu
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Jens C Eickhoff
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Ricardo V Lloyd
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
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12
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Jung J, Jeong S, Jeong H, Oh HE, Choi JW, Lee ES, Kim YS, Kwak Y, Kim WH, Lee JH. Increased HOXC6 mRNA expression is a novel biomarker of gastric cancer. PLoS One 2020; 15:e0236811. [PMID: 32745141 PMCID: PMC7398522 DOI: 10.1371/journal.pone.0236811] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 07/15/2020] [Indexed: 12/22/2022] Open
Abstract
In this study, we aimed to investigate the molecular biomarkers that are pivotal for the development and progression of gastric cancer (GC). We analyzed clinical specimens using RNA sequencing to identify the target genes. We found that the expression of HOXC6 mRNA was upregulated with the progression of cancer, which was validated by quantitative real time PCR and RNA in-situ hybridization. To compare the protein expression of HOXC6, we evaluated GC and normal gastric tissue samples using western blot analysis and immunohistochemistry. We detected significantly higher levels of HOXC6 in the GC tissues than in the normal controls at both mRNA and protein levels. The expression levels of HOXC6 mRNA in patients with advanced gastric cancer (AGC) were significantly higher than those in patients with early gastric cancer (EGC). Kaplan-Meier curves showed that high expression of HOXC6 mRNA is significantly associated with poor clinical prognosis. Our findings suggest that HOXC6 mRNA may be a novel biomarker and can be potentially valuable in predicting the prognosis of GC patients. Especially, HOXC6 mRNA in-situ hybridization may be a diagnostic tool for predicting prognosis of individual GC patients.
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Affiliation(s)
- Jiyoon Jung
- Department of Pathology, Ansan Hospital, Korea University College of Medicine, Ansan-Si, Gyeonggi-Do, Republic of Korea
| | - Sanghoon Jeong
- Medical Science Research Center, Ansan Hospital, Korea University College of Medicine, Ansan-si, Gyeonggi-Do, Republic of Korea
| | - Hoiseon Jeong
- Department of Pathology, Ansan Hospital, Korea University College of Medicine, Ansan-Si, Gyeonggi-Do, Republic of Korea
| | - Hwa Eun Oh
- Department of Pathology, Ansan Hospital, Korea University College of Medicine, Ansan-Si, Gyeonggi-Do, Republic of Korea
| | - Jung-Woo Choi
- Department of Pathology, Ansan Hospital, Korea University College of Medicine, Ansan-Si, Gyeonggi-Do, Republic of Korea
| | - Eung Seok Lee
- Department of Pathology, Ansan Hospital, Korea University College of Medicine, Ansan-Si, Gyeonggi-Do, Republic of Korea
| | - Young-Sik Kim
- Department of Pathology, Ansan Hospital, Korea University College of Medicine, Ansan-Si, Gyeonggi-Do, Republic of Korea
| | - Yoonjin Kwak
- Department of Pathology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Woo Ho Kim
- Department of Pathology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Ju-Han Lee
- Department of Pathology, Ansan Hospital, Korea University College of Medicine, Ansan-Si, Gyeonggi-Do, Republic of Korea
- * E-mail:
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Tan C, Dai Y, Liu X, Zhao G, Wang W, Li J, Qi L. STAT5A induced LINC01198 promotes proliferation of glioma cells through stabilizing DGCR8. Aging (Albany NY) 2020; 12:5675-5692. [PMID: 32246817 PMCID: PMC7185146 DOI: 10.18632/aging.102938] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/27/2020] [Indexed: 01/03/2023]
Abstract
Background: LINC01198 has been suggested to be able to predict overall prognosis for glioma; however, it has been little described in glioma. Results: It was shown that LINC01198 was markedly enriched in neoplasmic tissues relative to normal controls; and that elevated LINC01198 significantly correlated with unfavorable overall prognosis. Moreover, activation of STAT5A, identified as transcription factor (TF), can induce the expression of LINC01198. DGCR8, a kind of RNA-binding proteins (RBPs), was identified to be able to bind with LINC01198 that can stabilize the DGCR8. Five differential miRNAs with most significant difference, including miR-21-5p, miR-34-5p, miR-1246, miR-4488 and miR-494, were obtainable after silencing of DGCR8. Conclusions: Together, the data we presented here suggested that STAT5 induced LINC01198 promotes proliferation and motility of glioma cells through stabilizing DGCR8 in glioma cells. Methods: Expression of LINC01198 was appraised by quantitative PCR (qPCR) and in situ hybridization (ISH) in glioma clinical specimens, totaling 100 cases. Post hoc statistical analysis was conducted. In vitro, LINC01198 was stably silenced or re-expressed by transfection with lentiviral-based vectors. Chromatin-immunoprecipitation (CHIP) was applied to identify the relevant TFs that can bind with LINC01198, which was corroborated with electrophoretic mobility shift (EMSA) assay. RNA-immunoprecipitation (RIP) was used to identify the RNA-binding protein that can bind with LINC01198. Moreover, miRNA microarray was used to screen out differential miRNAs after silencing of DGCR8.
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Affiliation(s)
- Cheng Tan
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
| | - Yimeng Dai
- Department of Radiology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
| | - Xiaoyang Liu
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
| | - Guifang Zhao
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan 511518, P.R. China.,Department of Pathophysiology, Jilin Medical University, Jilin 132013, P.R. China
| | - Weiyao Wang
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan 511518, P.R. China.,Department of Pathophysiology, Jilin Medical University, Jilin 132013, P.R. China
| | - Jia Li
- Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P.R. China
| | - Ling Qi
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan 511518, P.R. China.,Department of Pathophysiology, Jilin Medical University, Jilin 132013, P.R. China
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Rahman HU, Yue X, Yu Q, Zhang W, Zhang Q, Li P. Current PCR-based methods for the detection of mycotoxigenic fungi in complex food and feed matrices. WORLD MYCOTOXIN J 2020. [DOI: 10.3920/wmj2019.2455] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Mycotoxins are toxic secondary fungal metabolites produced by certain types of filamentous fungi, such as Aspergillus, Fusarium, and Penicillium spp. Mycotoxigenic fungi and their produced mycotoxins are considered to be an important issue in food and feed safety due to their toxic effects like carcinogenicity, immunosuppression, neurotoxicity, nephrotoxicity, and hepatotoxicity on humans and animals. To boost the safety level of food and feedstuff, detection and identification of toxins are essential at critical control points across food and feed chains. Zero-tolerance policies by the European Union and other organizations about the extreme low level of tolerance of mycotoxins contamination in food and feed matrices have led to an increasing interest to design more sensitive, specific, rapid, cost-effective, and safer to use mycotoxigenic fungi detection technologies. Hence, many mycotoxigenic fungi detection technologies have been applied to measure and control toxins contamination in food and feed substrates. PCR-based mycotoxigenic fungi detection technologies, such as conventional PCR, real-time PCR, nested PCR, reverse transcriptase (RT)-PCR, loop-mediated isothermal amplification (LAMP), in situ PCR, polymerase chain reaction-denaturing gradient gel electrophoresis (PCR DGGE), co-operational PCR, multiplex PCR, DNA arrays, magnetic capture-hybridization (MCH)-PCR and restriction fragment length polymorphism (RFLP), would contribute to our understanding about different mycotoxigenic fungi detection approaches and will enhance our capability about mycotoxigenic fungi identification, isolation and characterization at critical control points across food and feed chains. We have assessed the principles, results, the limit of detection, and application of these PCR-based detection technologies to alleviate mycotoxins contamination problem in complex food and feed substrates. The potential application of these detection technologies can reduce mycotoxins in complex food and feed matrices.
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Affiliation(s)
- H. Ur Rahman
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China P.R
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China P.R
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China P.R
| | - X. Yue
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China P.R
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China P.R
- Laboratory of Quality & Safety Risk Assessment for Oilseeds Products, Wuhan, Ministry of Agriculture, Wuhan 430062, China P.R
| | - Q. Yu
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China P.R
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China P.R
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China P.R
- National Reference Laboratory for Agricultural Testing (Biotoxin), Wuhan 430062, China P.R
| | - W. Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China P.R
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China P.R
- Quality Inspection and Test Center for Oilseeds Products, Ministry of Agriculture, Wuhan 430062, China P.R
| | - Q. Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China P.R
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China P.R
- Laboratory of Quality & Safety Risk Assessment for Oilseeds Products, Wuhan, Ministry of Agriculture, Wuhan 430062, China P.R
| | - P. Li
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China P.R
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China P.R
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China P.R
- Laboratory of Quality & Safety Risk Assessment for Oilseeds Products, Wuhan, Ministry of Agriculture, Wuhan 430062, China P.R
- National Reference Laboratory for Agricultural Testing (Biotoxin), Wuhan 430062, China P.R
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