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Zeng L, Yang K, Zhang T, Zhu X, Hao W, Chen H, Ge J. Research progress of single-cell transcriptome sequencing in autoimmune diseases and autoinflammatory disease: A review. J Autoimmun 2022; 133:102919. [PMID: 36242821 DOI: 10.1016/j.jaut.2022.102919] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 12/07/2022]
Abstract
Autoimmunity refers to the phenomenon that the body's immune system produces antibodies or sensitized lymphocytes to its own tissues to cause an immune response. Immune disorders caused by autoimmunity can mediate autoimmune diseases. Autoimmune diseases have complicated pathogenesis due to the many types of cells involved, and the mechanism is still unclear. The emergence of single-cell research technology can solve the problem that ordinary transcriptome technology cannot be accurate to cell type. It provides unbiased results through independent analysis of cells in tissues and provides more mRNA information for identifying cell subpopulations, which provides a novel approach to study disruption of immune tolerance and disturbance of pro-inflammatory pathways on a cellular basis. It may fundamentally change the understanding of molecular pathways in the pathogenesis of autoimmune diseases and develop targeted drugs. Single-cell transcriptome sequencing (scRNA-seq) has been widely applied in autoimmune diseases, which provides a powerful tool for demonstrating the cellular heterogeneity of tissues involved in various immune inflammations, identifying pathogenic cell populations, and revealing the mechanism of disease occurrence and development. This review describes the principles of scRNA-seq, introduces common sequencing platforms and practical procedures, and focuses on the progress of scRNA-seq in 41 autoimmune diseases, which include 9 systemic autoimmune diseases and autoinflammatory diseases (rheumatoid arthritis, systemic lupus erythematosus, etc.) and 32 organ-specific autoimmune diseases (5 Skin diseases, 3 Nervous system diseases, 4 Eye diseases, 2 Respiratory system diseases, 2 Circulatory system diseases, 6 Liver, Gallbladder and Pancreas diseases, 2 Gastrointestinal system diseases, 3 Muscle, Bones and joint diseases, 3 Urinary system diseases, 2 Reproductive system diseases). This review also prospects the molecular mechanism targets of autoimmune diseases from the multi-molecular level and multi-dimensional analysis combined with single-cell multi-omics sequencing technology (such as scRNA-seq, Single cell ATAC-seq and single cell immune group library sequencing), which provides a reference for further exploring the pathogenesis and marker screening of autoimmune diseases and autoimmune inflammatory diseases in the future.
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Affiliation(s)
- Liuting Zeng
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, National Clinical Research Center for Dermatologic and Immunologic Diseases, State Key Laboratory of Complex Severe and Rare Diseases, Beijing, China.
| | - Kailin Yang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China.
| | - Tianqing Zhang
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China
| | - Xiaofei Zhu
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China.
| | - Wensa Hao
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Hua Chen
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, National Clinical Research Center for Dermatologic and Immunologic Diseases, State Key Laboratory of Complex Severe and Rare Diseases, Beijing, China.
| | - Jinwen Ge
- Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, China; Hunan Academy of Chinese Medicine, Changsha, China.
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Pisano A, Pera LL, Carletti R, Cerbelli B, Pignataro MG, Pernazza A, Ferre F, Lombardi M, Lazzeroni D, Olivotto I, Rimoldi OE, Foglieni C, Camici PG, d'Amati G. RNA-seq profiling reveals different pathways between remodeled vessels and myocardium in hypertrophic cardiomyopathy. Microcirculation 2022; 29:e12790. [PMID: 36198058 PMCID: PMC9787970 DOI: 10.1111/micc.12790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 09/01/2022] [Accepted: 09/30/2022] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Coronary microvascular dysfunction (CMD) is a key pathophysiological feature of hypertrophic cardiomyopathy (HCM), contributing to myocardial ischemia and representing a critical determinant of patients' adverse outcome. The molecular mechanisms underlying the morphological and functional changes of CMD are still unknown. Aim of this study was to obtain insights on the molecular pathways associated with microvessel remodeling in HCM. METHODS Interventricular septum myectomies from patients with obstructive HCM (n = 20) and donors' hearts (CTRL, discarded for technical reasons, n = 7) were collected. Remodeled intramyocardial arterioles and cardiomyocytes were microdissected by laser capture and next-generation sequencing was used to delineate the transcriptome profile. RESULTS We identified 720 exclusive differentially expressed genes (DEGs) in cardiomyocytes and 1315 exclusive DEGs in remodeled arterioles of HCM. Performing gene ontology and pathway enrichment analyses, we identified selectively altered pathways between remodeled arterioles and cardiomyocytes in HCM patients and controls. CONCLUSIONS We demonstrate the existence of distinctive pathways between remodeled arterioles and cardiomyocytes in HCM patients and controls at the transcriptome level.
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Affiliation(s)
- Annalinda Pisano
- Department of Radiological, Oncological and Pathological SciencesSapienza University of RomeRomeItaly
| | - Loredana Le Pera
- Italian National Institute of Health (ISS), Core FacilitiesRomeItaly,National Research Council (IBIOM‐CNR)Institute of Biomembranes, Bioenergetics and Molecular BiotechnologiesBariItaly
| | - Raffaella Carletti
- Department of Translational and Precision MedicineSapienza University of RomeRomeItaly
| | - Bruna Cerbelli
- Department of Medico‐Surgical Sciences and BiotechnologiesSapienza University of RomeLatinaItaly
| | - Maria G. Pignataro
- Department of Chemistry and Drug TechnologiesSapienza University of RomeRomeItaly
| | - Angelina Pernazza
- Department of Medico‐Surgical Sciences and BiotechnologiesSapienza University of RomeLatinaItaly
| | - Fabrizio Ferre
- Department of Pharmacy and Biotechnology (FABIT)University of BolognaBolognaItaly
| | - Maria Lombardi
- Cardiovascular Research CenterIRCCS San Raffaele Scientific InstituteMilanItaly
| | - Davide Lazzeroni
- Cardiovascular Research CenterIRCCS San Raffaele Scientific InstituteMilanItaly
| | | | - Ornella E. Rimoldi
- National Research Council (IBFM‐CNR)Institute of Molecular Bioimaging and PhysiologyMilanItaly
| | - Chiara Foglieni
- Cardiovascular Research CenterIRCCS San Raffaele Scientific InstituteMilanItaly
| | - Paolo G. Camici
- Cardiovascular Research CenterIRCCS San Raffaele Scientific InstituteMilanItaly,Faculty of Medicine and SurgeryVita‐Salute UniversityMilanItaly
| | - Giulia d'Amati
- Department of Radiological, Oncological and Pathological SciencesSapienza University of RomeRomeItaly
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Kelley MW. Cochlear Development; New Tools and Approaches. Front Cell Dev Biol 2022; 10:884240. [PMID: 35813214 PMCID: PMC9260282 DOI: 10.3389/fcell.2022.884240] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 05/19/2022] [Indexed: 12/21/2022] Open
Abstract
The sensory epithelium of the mammalian cochlea, the organ of Corti, is comprised of at least seven unique cell types including two functionally distinct types of mechanosensory hair cells. All of the cell types within the organ of Corti are believed to develop from a population of precursor cells referred to as prosensory cells. Results from previous studies have begun to identify the developmental processes, lineage restrictions and signaling networks that mediate the specification of many of these cell types, however, the small size of the organ and the limited number of each cell type has hampered progress. Recent technical advances, in particular relating to the ability to capture and characterize gene expression at the single cell level, have opened new avenues for understanding cellular specification in the organ of Corti. This review will cover our current understanding of cellular specification in the cochlea, discuss the most commonly used methods for single cell RNA sequencing and describe how results from a recent study using single cell sequencing provided new insights regarding cellular specification.
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Kashyap A, Rapsomaniki MA, Barros V, Fomitcheva-Khartchenko A, Martinelli AL, Rodriguez AF, Gabrani M, Rosen-Zvi M, Kaigala G. Quantification of tumor heterogeneity: from data acquisition to metric generation. Trends Biotechnol 2021; 40:647-676. [PMID: 34972597 DOI: 10.1016/j.tibtech.2021.11.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 01/18/2023]
Abstract
Tumors are unique and complex ecosystems, in which heterogeneous cell subpopulations with variable molecular profiles, aggressiveness, and proliferation potential coexist and interact. Understanding how heterogeneity influences tumor progression has important clinical implications for improving diagnosis, prognosis, and treatment response prediction. Several recent innovations in data acquisition methods and computational metrics have enabled the quantification of spatiotemporal heterogeneity across different scales of tumor organization. Here, we summarize the most promising efforts from a common experimental and computational perspective, discussing their advantages, shortcomings, and challenges. With personalized medicine entering a new era of unprecedented opportunities, our vision is that of future workflows integrating across modalities, scales, and dimensions to capture intricate aspects of the tumor ecosystem and to open new avenues for improved patient care.
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Affiliation(s)
- Aditya Kashyap
- IBM Research Europe -Säumerstrasse 4, Rüschlikon CH-8803, Zurich, Switzerland
| | | | - Vesna Barros
- Department of Healthcare Informatics, IBM Research, IBM R&D Labs, University of Haifa Campus, Mount Carmel, Haifa, 3498825, Israel; The Hebrew University, The Edmond J. Safra Campus - Givat Ram, Jerusalem, 9190401, Israel
| | - Anna Fomitcheva-Khartchenko
- IBM Research Europe -Säumerstrasse 4, Rüschlikon CH-8803, Zurich, Switzerland; Eidgenössische Technische Hochschule (ETH-Zurich), Vladimir-Prelog-Weg 1-5/10, 8099 Zurich, Switzerland
| | | | | | - Maria Gabrani
- IBM Research Europe -Säumerstrasse 4, Rüschlikon CH-8803, Zurich, Switzerland
| | - Michal Rosen-Zvi
- Department of Healthcare Informatics, IBM Research, IBM R&D Labs, University of Haifa Campus, Mount Carmel, Haifa, 3498825, Israel; The Hebrew University, The Edmond J. Safra Campus - Givat Ram, Jerusalem, 9190401, Israel
| | - Govind Kaigala
- IBM Research Europe -Säumerstrasse 4, Rüschlikon CH-8803, Zurich, Switzerland.
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Cheng L, Mann SA, Lopez-Beltran A, Chovanec M, Santoni M, Wang M, Albany C, Adra N, Davidson DD, Cimadamore A, Montironi R, Zhang S. Molecular Characterization of Testicular Germ Cell Tumors Using Tissue Microdissection. Methods Mol Biol 2021; 2195:31-47. [PMID: 32852755 DOI: 10.1007/978-1-0716-0860-9_3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Testicular germ cell tumors are among the most common malignancies seen in children and young adults. Genomic studies have identified characteristic molecular profiles in testicular cancer, which are associated with histologic subtypes and may predict clinical behavior including treatment responses. Emerging molecular technologies analyzing tumor genomics, transcriptomics, and proteomics may now guide precision management of testicular tumors. Laser-assisted microdissection methods such as laser capture microdissection efficiently isolate selected tumor cells from routine pathology specimens, avoiding contamination from nontarget cell populations. Laser capture microdissection in combination with next generation sequencing makes precise high throughput genetic evaluation effective and efficient. The use of laser capture microdissection (LCM) for molecular testing may translate into great benefits for the clinical management of patients with testicular cancers. This review discusses application protocols for laser-assisted microdissection to investigate testicular germ cell tumors.
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Affiliation(s)
- Liang Cheng
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA. .,Department of Urology, Indiana University School of Medicine, Indianapolis, IN, USA.
| | - Steven A Mann
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Antonio Lopez-Beltran
- Department of Pathology and Surgery, Faculty of Medicine, University of Cordoba, Cordoba, Spain.,Pathology Service, Champalimaud Clinical Center, Lisbon, Portugal
| | - Michal Chovanec
- 2nd Department of Oncology, Faculty of Medicine, Comenius University and National Cancer Institute, Bratislava, Slovakia.,Division of Hematology and Oncology, Indiana University Simon Cancer Center, Indianapolis, IN, USA
| | | | - Mingsheng Wang
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Costantine Albany
- Department of Medicine, Division of Hematology and Oncology, Indiana University Simon Cancer Center, Indianapolis, IN, USA
| | - Nabil Adra
- Department of Medicine, Division of Hematology and Oncology, Indiana University Simon Cancer Center, Indianapolis, IN, USA
| | - Darrell D Davidson
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Alessia Cimadamore
- Section of Pathological Anatomy, Polytechnic University of the Marche Region, School of Medicine, United Hospitals, Ancona, Italy
| | - Rodolfo Montironi
- Section of Pathological Anatomy, Polytechnic University of the Marche Region, School of Medicine, United Hospitals, Ancona, Italy
| | - Shaobo Zhang
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
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Biocompatibility and Immune Response of a Newly Developed Volume-Stable Magnesium-Based Barrier Membrane in Combination with a PVD Coating for Guided Bone Regeneration (GBR). Biomedicines 2020; 8:biomedicines8120636. [PMID: 33419327 PMCID: PMC7767206 DOI: 10.3390/biomedicines8120636] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/13/2020] [Accepted: 12/18/2020] [Indexed: 02/08/2023] Open
Abstract
To date, there are no bioresorbable alternatives to non-resorbable and volume-stable membranes in the field of dentistry for guided bone or tissue regeneration (GBR/GTR). Even magnesium (Mg) has been shown to constitute a favorable biomaterial for the development of stabilizing structures. However, it has been described that it is necessary to prevent premature degradation to ensure both the functionality and the biocompatibility of such Mg implants. Different coating strategies have already been developed, but most of them did not provide the desired functionality. The present study analyses a new approach based on ion implantation (II) with PVD coating for the passivation of a newly developed Mg membrane for GBR/GTR procedures. To demonstrate comprehensive biocompatibility and successful passivation of the Mg membranes, untreated Mg (MG) and coated Mg (MG-Co) were investigated in vitro and in vivo. Thereby a collagen membrane with an already shown biocompatibility was used as control material. All investigations were performed according to EN ISO 10993 regulations. The in vitro results showed that both the untreated and PVD-coated membranes were not cytocompatible. However, both membrane types fulfilled the requirements for in vivo biocompatibility. Interestingly, the PVD coating did not have an influence on the gas cavity formation compared to the uncoated membrane, but it induced lower numbers of anti-inflammatory macrophages in comparison to the pure Mg membrane and the collagen membrane. In contrast, the pure Mg membrane provoked an immune response that was fully comparable to the collagen membrane. Altogether, this study shows that pure magnesium membranes represent a promising alternative compared to the nonresorbable volume-stable materials for GBR/GTR therapy.
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7
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Han CM, Waks E, Shapiro B. Mathematical modeling and experimental validation for expression microdissection. APPLIED OPTICS 2020; 59:5870-5880. [PMID: 32672729 DOI: 10.1364/ao.395864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Using laser excitation, expression microdissection (xMD) can selectively heat cancer cells targeted via immunohistochemical staining to enable their selective retrieval from tumor tissue samples, thus reducing misdiagnoses caused by contamination of noncancerous cells. Several theoretical models have been validated for the photothermal effect in highly light absorbing and scattering media. However, these models are not generally applicable to the physics behind the process of xMD. In this study, we propose a thermal model that can analyze the transient temperature distribution and heat melt zone in an xMD sample medium composed of a thermoplastic film and a tumor tissue sample sandwiched between two glass slides. Furthermore, we experimentally examined the model using an ink layer with controllable optical properties to serve as a microscale-thin, tissue-mimicking phantom and found the experimentally measured film temperature is in good agreement with the model predictions. The validated model can help researchers to optimize cell retrieval by xMD for improved diagnostics of cancer and other diseases.
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Comba A, Dunn PJ, Kish PE, Kadiyala P, Kahana A, Castro MG, Lowenstein PR. Laser Capture Microdissection of Glioma Subregions for Spatial and Molecular Characterization of Intratumoral Heterogeneity, Oncostreams, and Invasion. J Vis Exp 2020. [PMID: 32338655 DOI: 10.3791/60939] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Gliomas are primary brain tumors characterized by their invasiveness and heterogeneity. Specific histological patterns such as pseudopalisades, microvascular proliferation, mesenchymal transformation and necrosis characterize the histological heterogeneity of high-grade gliomas. Our laboratory has demonstrated that the presence of high densities of mesenchymal cells, named oncostreams, correlate with tumor malignancy. We have developed a unique approach to understand the mechanisms that underlie glioma's growth and invasion. Here, we describe a comprehensive protocol that utilizes laser capture microdissection (LMD) and RNA sequencing to analyze differential mRNA expression of intra-tumoral heterogeneous multicellular structures (i.e., mesenchymal areas or areas of tumor invasion). This method maintains good tissue histology and RNA integrity. Perfusion, freezing, embedding, sectioning, and staining were optimized to preserve morphology and obtain high-quality laser microdissection samples. The results indicate that perfusion of glioma bearing mice using 30% sucrose provides good morphology and RNA quality. In addition, staining tumor sections with 4% Cresyl violet and 0.5% eosin results in good nuclear and cellular staining, while preserving RNA integrity. The method described is sensitive and highly reproducible and it can be utilized to study tumor morphology in various tumor models. In summary, we describe a complete method to perform LMD that preserves morphology and RNA quality for sequencing to study the molecular features of heterogeneous multicellular structures within solid tumors.
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Affiliation(s)
- Andrea Comba
- Dept. of Neurosurgery, University of Michigan Medical School; Dept. of Cell and Developmental Biology, University of Michigan Medical School; Rogel Cancer Center, University of Michigan Medical School
| | - Patrick J Dunn
- Dept. of Neurosurgery, University of Michigan Medical School; Dept. of Cell and Developmental Biology, University of Michigan Medical School; Rogel Cancer Center, University of Michigan Medical School
| | - Phillip E Kish
- Dept. of Neurosurgery, University of Michigan Medical School; Dept. of Ophthalmology & Visual Science, University of Michigan Medical School
| | - Padma Kadiyala
- Dept. of Neurosurgery, University of Michigan Medical School; Dept. of Cell and Developmental Biology, University of Michigan Medical School; Rogel Cancer Center, University of Michigan Medical School
| | - Alon Kahana
- Dept. of Ophthalmology & Visual Science, University of Michigan Medical School
| | - Maria G Castro
- Dept. of Neurosurgery, University of Michigan Medical School; Dept. of Cell and Developmental Biology, University of Michigan Medical School; Rogel Cancer Center, University of Michigan Medical School
| | - Pedro R Lowenstein
- Dept. of Neurosurgery, University of Michigan Medical School; Dept. of Cell and Developmental Biology, University of Michigan Medical School; Rogel Cancer Center, University of Michigan Medical School;
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A Single Cell but Many Different Transcripts: A Journey into the World of Long Non-Coding RNAs. Int J Mol Sci 2020; 21:ijms21010302. [PMID: 31906285 PMCID: PMC6982300 DOI: 10.3390/ijms21010302] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/17/2019] [Accepted: 12/23/2019] [Indexed: 02/07/2023] Open
Abstract
In late 2012 it was evidenced that most of the human genome is transcribed but only a small percentage of the transcripts are translated. This observation supported the importance of non-coding RNAs and it was confirmed in several organisms. The most abundant non-translated transcripts are long non-coding RNAs (lncRNAs). In contrast to protein-coding RNAs, they show a more cell-specific expression. To understand the function of lncRNAs, it is fundamental to investigate in which cells they are preferentially expressed and to detect their subcellular localization. Recent improvements of techniques that localize single RNA molecules in tissues like single-cell RNA sequencing and fluorescence amplification methods have given a considerable boost in the knowledge of the lncRNA functions. In recent years, single-cell transcription variability was associated with non-coding RNA expression, revealing this class of RNAs as important transcripts in the cell lineage specification. The purpose of this review is to collect updated information about lncRNA classification and new findings on their function derived from single-cell analysis. We also retained useful for all researchers to describe the methods available for single-cell analysis and the databases collecting single-cell and lncRNA data. Tables are included to schematize, describe, and compare exposed concepts.
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Abstract
The purpose of this chapter is to provide a step-by-step protocol to enable performance of laser capture microdissection (LCM) on tissue sections from mammalian embryos or postnatal organism stages in order to collect pure populations of neural crest cells from which sufficient amounts of nucleic acids and/or protein can be obtained for quantitative analysis. The methods (1) define a strategy to genetically and indelibly label mammalian neural crest-derived cells with a fluorescent marker, thus enabling their isolation throughout the pre- and postnatal life span of the organism, and (2) describe subsequent isolation by LCM of the labeled neural crest cells, or their derivatives, from embryonic/postnatal tissue cryosections. Details are provided for using the Arcturus PixCell®IIe Laser Capture Microdissection System (Arcturus) and CapSure LCM Caps (Thermo Fisher Scientific), to which the selected cells adhere upon laser-mediated capture. The protocol outlined herein can be applied in any situation wherein limited cellular samples are available for isolation by LCM. Nucleic acids or proteins can be extracted from LCM-isolated cells and processed for high-density gene expression profiling analyses (microarrays or RNA sequencing), Real-Time PCR (q-PCR) for specific candidate gene expression, investigation of DNA methylation, as well as for varied protein analyses.
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Priemer DS, Wang M, Zhang S, Lopez-Beltran A, Kouba E, Montironi R, Davidson DD, MacLennan GT, Wang L, Osunkoya AO, Deng Y, Emerson RE, Cheng L. Small-cell Carcinomas of the Urinary Bladder and Prostate: TERT Promoter Mutation Status Differentiates Sites of Malignancy and Provides Evidence of Common Clonality Between Small-cell Carcinoma of the Urinary Bladder and Urothelial Carcinoma. Eur Urol Focus 2018; 4:880-888. [DOI: 10.1016/j.euf.2017.03.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/01/2017] [Accepted: 03/13/2017] [Indexed: 12/12/2022]
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A comparative analysis of library prep approaches for sequencing low input translatome samples. BMC Genomics 2018; 19:696. [PMID: 30241496 PMCID: PMC6151020 DOI: 10.1186/s12864-018-5066-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 09/11/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Cell type-specific ribosome-pulldown has become an increasingly popular method for analysis of gene expression. It allows for expression analysis from intact tissues and monitoring of protein synthesis in vivo. However, while its utility has been assessed, technical aspects related to sequencing of these samples, often starting with a smaller amount of RNA, have not been reported. In this study, we evaluated the performance of five library prep protocols for ribosome-associated mRNAs when only 250 pg-4 ng of total RNA are used. RESULTS We obtained total and RiboTag-IP RNA, in three biological replicates. We compared 5 methods of library preparation for Illumina Next Generation sequencing: NuGEN Ovation RNA-Seq system V2 Kit, TaKaRa SMARTer Stranded Total RNA-Seq Kit, TaKaRa SMART-Seq v4 Ultra Low Input RNA Kit, Illumina TruSeq RNA Library Prep Kit v2 and NEBNext® Ultra™ Directional RNA Library Prep Kit using slightly modified protocols each with 4 ng of total RNA. An additional set of samples was processed using the TruSeq kit with 70 ng, as a 'gold standard' control and the SMART-Seq v4 with 250 pg of total RNA. TruSeq-processed samples had the best metrics overall, with similar results for the 4 ng and 70 ng samples. The results of the SMART-Seq v4 processed samples were similar to TruSeq (Spearman correlation > 0.8) despite using lower amount of input RNA. All RiboTag-IP samples had an increase in the intronic reads compared with the corresponding whole tissue, suggesting that the IP captures some immature mRNAs. The SMARTer-processed samples had a higher representation of ribosomal and non-coding RNAs leading to lower representation of protein coding mRNA. The enrichment or depletion of IP samples compared to corresponding input RNA was similar across all kits except for SMARTer kit. CONCLUSION RiboTag-seq can be performed successfully with as little as 250 pg of total RNA when using the SMART-Seq v4 kit and 4 ng when using the modified protocols of other library preparation kits. The SMART-Seq v4 and TruSeq kits resulted in the highest quality libraries. RiboTag IP RNA contains some immature transcripts.
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Kummer S, Wilichowski E. Combination of microdissection and single cell quantitative real-time PCR revealed intercellular mitochondrial DNA heterogeneities in fibroblasts of Kearns-Sayre syndrome patients. Mitochondrion 2018; 43:37-42. [PMID: 30092295 DOI: 10.1016/j.mito.2018.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 07/24/2018] [Accepted: 08/02/2018] [Indexed: 11/26/2022]
Abstract
Kearns-Sayre syndrome (KSS) is a multisystemic disorder marked by aerobic cell metabolism dysfunction. Fibroblasts derived from KSS patient skin biopsy exhibit heterogeneous occurrence of mitochondrial genomes as those circular DNA molecules partially carry the common deletion. In our approach, we aim to evaluate the intercellular alterations in respect to mitochondrial DNA integrity by laser capture microdissection and multiplex quantitative real-time PCR in single cells. The obtained results give new insights into the understanding of mitochondrial genetics, e.g. postulated sorting of damaged mitochondria, and heterogeneity of cells. Further, we discuss the relevance of intercellular heterogeneities for human mitochondrial disorders in general.
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Affiliation(s)
- Susann Kummer
- Mitochondrial Structure and Dynamics, Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.
| | - Ekkehard Wilichowski
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg-August-Universität Göttingen, Göttingen, Germany
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xMD-miRNA-seq to generate near in vivo miRNA expression estimates in colon epithelial cells. Sci Rep 2018; 8:9783. [PMID: 29955168 PMCID: PMC6023933 DOI: 10.1038/s41598-018-28198-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 06/19/2018] [Indexed: 01/09/2023] Open
Abstract
Accurate, RNA-seq based, microRNA (miRNA) expression estimates from primary cells have recently been described. However, this in vitro data is mainly obtained from cell culture, which is known to alter cell maturity/differentiation status, significantly changing miRNA levels. What is needed is a robust method to obtain in vivo miRNA expression values directly from cells. We introduce expression microdissection miRNA small RNA sequencing (xMD-miRNA-seq), a method to isolate cells directly from formalin fixed paraffin-embedded (FFPE) tissues. xMD-miRNA-seq is a low-cost, high-throughput, immunohistochemistry-based method to capture any cell type of interest. As a proof-of-concept, we isolated colon epithelial cells from two specimens and performed low-input small RNA-seq. We generated up to 600,000 miRNA reads from the samples. Isolated epithelial cells, had abundant epithelial-enriched miRNA expression (miR-192; miR-194; miR-200b; miR-200c; miR-215; miR-375) and overall similar miRNA expression patterns to other epithelial cell populations (colonic enteroids and flow-isolated colon epithelium). xMD-derived epithelial cells were generally not contaminated by other adjacent cells of the colon as noted by t-SNE analysis. xMD-miRNA-seq allows for simple, economical, and efficient identification of cell-specific miRNA expression estimates. Further development will enhance rapid identification of cell-specific miRNA expression estimates in health and disease for nearly any cell type using archival FFPE material.
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Parsons BL. Multiclonal tumor origin: Evidence and implications. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2018; 777:1-18. [PMID: 30115427 DOI: 10.1016/j.mrrev.2018.05.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/11/2018] [Accepted: 05/05/2018] [Indexed: 12/31/2022]
Abstract
An accurate understanding of the clonal origins of tumors is critical for designing effective strategies to treat or prevent cancer and for guiding the field of cancer risk assessment. The intent of this review is to summarize evidence of multiclonal tumor origin and, thereby, contest the commonly held assumption of monoclonal tumor origin. This review describes relevant studies of X chromosome inactivation, analyses of tumor heterogeneity using other markers, single cell sequencing, and lineage tracing studies in aggregation chimeras and engineered rodent models. Methods for investigating tumor clonality have an inherent bias against detecting multiclonality. Despite this, multiclonality has been observed within all tumor stages and within 53 different types of tumors. For myeloid tumors, monoclonal tumor origin may be the predominant path to cancer and a monoclonal tumor origin cannot be ruled out for a fraction of other cancer types. Nevertheless, a large body of evidence supports the conclusion that most cancers are multiclonal in origin. Cooperation between different cell types and between clones of cells carrying different genetic and/or epigenetic lesions is discussed, along with how polyclonal tumor origin can be integrated with current perspectives on the genesis of tumors. In order to develop biologically sound and useful approaches to cancer risk assessment and precision medicine, mathematical models of carcinogenesis are needed, which incorporate multiclonal tumor origin and the contributions of spontaneous mutations in conjunction with the selective advantages conferred by particular mutations and combinations of mutations. Adherence to the idea that a growth must develop from a single progenitor cell to be considered neoplastic has outlived its usefulness. Moving forward, explicit examination of tumor clonality, using advanced tools, like lineage tracing models, will provide a strong foundation for future advances in clinical oncology and better training for the next generation of oncologists and pathologists.
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Affiliation(s)
- Barbara L Parsons
- US Food and Drug Administration, National Center for Toxicological Research, Division of Genetic and Molecular Toxicology, 3900 NCTR Rd., Jefferson, AR 72079, United States.
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16
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Abstract
Among various methods now available to isolate distinct cell populations or even single cells for DNA/RNA and proteomic analysis, laser capture microdissection (LCM) offers a unique opportunity to study cells in their topological contexts. This chapter focuses on the preparation of LCM membrane slides, tissue staining and laser microdissection of cells of interest from frozen or formalin-fixed, paraffin-embedded glioblastoma tissue.
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17
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Roh HC, Tsai LTY, Lyubetskaya A, Tenen D, Kumari M, Rosen ED. Simultaneous Transcriptional and Epigenomic Profiling from Specific Cell Types within Heterogeneous Tissues In Vivo. Cell Rep 2017; 18:1048-1061. [PMID: 28122230 DOI: 10.1016/j.celrep.2016.12.087] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/28/2016] [Accepted: 12/27/2016] [Indexed: 12/31/2022] Open
Abstract
Epigenomic mechanisms direct distinct gene expression programs for different cell types. Various in vivo tissues have been subjected to epigenomic analysis; however, these studies have been limited by cellular heterogeneity, resulting in composite gene expression and epigenomic profiles. Here, we introduce "NuTRAP," a transgenic mouse that allows simultaneous isolation of cell-type-specific translating mRNA and chromatin from complex tissues. Using NuTRAP, we successfully characterize gene expression and epigenomic states of various adipocyte populations in vivo, revealing significant differences compared to either whole adipose tissue or in vitro adipocyte cell lines. We find that chromatin immunoprecipitation sequencing (ChIP-seq) using NuTRAP is highly efficient, scalable, and robust with even limited cell input. We further demonstrate the general utility of NuTRAP by analyzing hepatocyte-specific epigenomic states. The NuTRAP mouse is a resource that provides a powerful system for cell-type-specific gene expression and epigenomic profiling.
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Affiliation(s)
- Hyun Cheol Roh
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Linus T-Y Tsai
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Anna Lyubetskaya
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Danielle Tenen
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Manju Kumari
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Evan D Rosen
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA; Department of Genetics, Harvard Medical School, Boston, MA 02215, USA; Broad Institute, Cambridge, MA 02142, USA.
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18
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Nyalwidhe JO, Grzesik WJ, Burch TC, Semeraro ML, Waseem T, Gerling IC, Mirmira RG, Morris MA, Nadler JL. Comparative quantitative proteomic analysis of disease stratified laser captured microdissected human islets identifies proteins and pathways potentially related to type 1 diabetes. PLoS One 2017; 12:e0183908. [PMID: 28877242 PMCID: PMC5587329 DOI: 10.1371/journal.pone.0183908] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 08/14/2017] [Indexed: 02/06/2023] Open
Abstract
Type 1 diabetes (T1D) is a chronic inflammatory disease that is characterized by autoimmune destruction of insulin-producing pancreatic beta cells. The goal of this study was to identify novel protein signatures that distinguish Islets from patients with T1D, patients who are autoantibody positive without symptoms of diabetes, and from individuals with no evidence of disease. High resolution high mass accuracy label free quantitative mass spectrometry analysis was applied to islets isolated by laser capture microdissection from disease stratified human pancreata from the Network for Pancreatic Organ Donors with Diabetes (nPOD), these included donors without diabetes, donors with T1D-associated autoantibodies in the absence of diabetes, and donors with T1D. Thirty-nine proteins were found to be differentially regulated in autoantibody positive cases compared to the no-disease group, with 25 upregulated and 14 downregulated proteins. For the T1D cases, 63 proteins were differentially expressed, with 24 upregulated and 39 downregulated, compared to the no disease controls. We have identified functional annotated enriched gene families and multiple protein-protein interaction clusters of proteins are involved in biological and molecular processes that may have a role in T1D. The proteins that are upregulated in T1D cases include S100A9, S100A8, REG1B, REG3A and C9 amongst others. These proteins have important biological functions, such as inflammation, metabolic regulation, and autoimmunity, all of which are pathways linked to the pathogenesis of T1D. The identified proteins may be involved in T1D development and pathogenesis. Our findings of novel proteins uniquely upregulated in T1D pancreas provides impetus for further investigations focusing on their expression profiles in beta cells/ islets to evaluate their role in the disease pathogenesis. Some of these molecules may be novel therapeutic targets T1D.
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Affiliation(s)
- Julius O. Nyalwidhe
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
- Leroy T. Canoles Jr. Cancer Research Center, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Wojciech J. Grzesik
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Tanya C. Burch
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
- Leroy T. Canoles Jr. Cancer Research Center, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Michele L. Semeraro
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Tayab Waseem
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Ivan C. Gerling
- Division of Endocrinology, Diabetes and Metabolism, The University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Raghavendra G. Mirmira
- Department of Pediatrics, Center for Diabetes and Metabolic Diseases, Indiana University, Indianapolis, Indiana, United States of America
| | - Margaret A. Morris
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Jerry L. Nadler
- Department of Internal Medicine, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
- The Strelitz Diabetes Center, Eastern Virginia Medical Center, Norfolk, Virginia, United States of America
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19
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Min L, Choy E, Tu C, Hornicek F, Duan Z. Application of metabolomics in sarcoma: From biomarkers to therapeutic targets. Crit Rev Oncol Hematol 2017; 116:1-10. [PMID: 28693790 PMCID: PMC5527996 DOI: 10.1016/j.critrevonc.2017.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 04/25/2017] [Accepted: 05/09/2017] [Indexed: 02/05/2023] Open
Affiliation(s)
- Li Min
- Sarcoma Biology Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital and Harvard Medical School, 55 Fruit Street, Jackson 1115, Boston, MA 02114, USA; Department of Orthopedics, West China Hospital, Sichuan University, 37 Guoxue Road, Chengdu, Sichuan, 610041, China
| | - Edwin Choy
- Sarcoma Biology Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital and Harvard Medical School, 55 Fruit Street, Jackson 1115, Boston, MA 02114, USA
| | - Chongqi Tu
- Department of Orthopedics, West China Hospital, Sichuan University, 37 Guoxue Road, Chengdu, Sichuan, 610041, China
| | - Francis Hornicek
- Sarcoma Biology Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital and Harvard Medical School, 55 Fruit Street, Jackson 1115, Boston, MA 02114, USA
| | - Zhenfeng Duan
- Sarcoma Biology Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital and Harvard Medical School, 55 Fruit Street, Jackson 1115, Boston, MA 02114, USA.
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20
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Podgorny OV, Lazarev VN. Laser microdissection: A promising tool for exploring microorganisms and their interactions with hosts. J Microbiol Methods 2017; 138:82-92. [PMID: 26775287 DOI: 10.1016/j.mimet.2016.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Revised: 11/11/2015] [Accepted: 01/01/2016] [Indexed: 12/14/2022]
Abstract
Laser microdissection is a method that allows for the isolation of homogenous cell populations from their native niches in tissues for downstream molecular assays. This method is widely used for genomic analysis, gene expression profiling and proteomic and metabolite assays in various fields of biology, but it remains an uncommon approach in microbiological research. In spite of the limited number of publications, laser microdissection was shown to be an extremely useful method for studying host-microorganism interactions in animals and plants, investigating bacteria within biofilms, identifying uncultivated bacteria and performing single prokaryotic cell analysis. The current paper describes the methodological aspects of commercially available laser microdissection instruments and representative examples that demonstrate the advantages of this method for resolving a variety of issues in microbiology.
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Affiliation(s)
- Oleg V Podgorny
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, 1a Malaya Pirogovskaya Str., Moscow 119435, Russia; Koltzov Institute of Developmental Biology of the Russian Academy of Sciences, 26 Vavilov Str., Moscow 119334, Russia.
| | - Vassili N Lazarev
- Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, 1a Malaya Pirogovskaya Str., Moscow 119435, Russia
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21
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Garrido-Gil P, Fernandez-Rodríguez P, Rodríguez-Pallares J, Labandeira-Garcia JL. Laser capture microdissection protocol for gene expression analysis in the brain. Histochem Cell Biol 2017; 148:299-311. [PMID: 28560490 DOI: 10.1007/s00418-017-1585-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2017] [Indexed: 01/18/2023]
Abstract
Laser capture microdissection (LCM) allows the isolation of specific cell populations from complex tissues that can be then used for gene expression studies. However, there are no reproducible protocols to study RNA in the brain and, particularly, in the substantia nigra. RNA is a very labile biomolecule that is easily degraded during manipulation. LCM studies use low amounts of material and special precautions must be taken to preserve RNA yield and integrity, which are decisive for PCR analysis. The RNA yield and/or integrity can be affected negatively by tissue manipulation, LCM process and RNA extraction. We have optimized these three critical steps using nigral tissue sections, and developed a LCM protocol to obtain high-quality RNA for gene expression analysis. The optimal LCM protocol requires the use of 20 µm-thick tissue sections mounted on glass slides and processed for rapid tyrosine hydroxylase immunofluorescence. Additionally, a total microdissected tissue area of 1 mm2 and a column-based RNA extraction method were used to obtain a high RNA yield and integrity. In the rat substantia nigra, we demonstrated the expression of RNA for the angiotensin type 1 and type 2 receptors using this optimized LCM protocol. In conclusion, the LCM protocol reported here can be used to study the expression of both scarcely or abundantly expressed genes in the different brain regions of mammals under both physiological and pathological conditions.
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Affiliation(s)
- P Garrido-Gil
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, CIMUS, University of Santiago de Compostela, 15782, Santiago De Compostela, Spain.,Research Center on Neurodegenerative Diseases (CIBERNED), Madrid, Spain
| | - P Fernandez-Rodríguez
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, CIMUS, University of Santiago de Compostela, 15782, Santiago De Compostela, Spain
| | - J Rodríguez-Pallares
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, CIMUS, University of Santiago de Compostela, 15782, Santiago De Compostela, Spain.,Research Center on Neurodegenerative Diseases (CIBERNED), Madrid, Spain
| | - Jose L Labandeira-Garcia
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, CIMUS, University of Santiago de Compostela, 15782, Santiago De Compostela, Spain. .,Research Center on Neurodegenerative Diseases (CIBERNED), Madrid, Spain.
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22
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Infrared laser ablation sample transfer of tissue DNA for genomic analysis. Anal Bioanal Chem 2017; 409:4119-4126. [DOI: 10.1007/s00216-017-0373-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 04/20/2017] [Indexed: 01/01/2023]
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23
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Cheng L, Zhang S, Wang L, MacLennan GT, Davidson DD. Fluorescence in situ hybridization in surgical pathology: principles and applications. JOURNAL OF PATHOLOGY CLINICAL RESEARCH 2017; 3:73-99. [PMID: 28451457 PMCID: PMC5402181 DOI: 10.1002/cjp2.64] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/16/2016] [Accepted: 12/20/2016] [Indexed: 02/06/2023]
Abstract
Identification of recurrent tumour‐specific chromosomal translocations and novel fusion oncogenes has important diagnostic, therapeutic and prognostic implications. Over the past decade, fluorescence in situ hybridization (FISH) analysis of tumour samples has been one of the most rapidly growing areas in genomic medicine and surgical pathology practice. Unlike traditional cytogenetics, FISH affords a rapid analysis of formalin‐fixed, paraffin‐embedded cells within a routine pathology practice workflow. As more diagnostic and treatment decisions are based on results of FISH, demand for the technology will become more widespread. Common FISH‐detected alterations are chromosome deletions, gains, translocations, amplifications and polysomy. These chromosome alterations may have diagnostic and therapeutic implications for many tumour types. Integrating genomic testing into cancer treatment decisions poses many technical challenges, but rapid progress is being made to overcome these challenges in precision medicine. FISH assessment of chromosomal changes relevant to differential diagnosis and cancer treatment decisions has become an important tool for the surgical pathologist. The aim of this review is to provide a theoretical and practical survey of FISH detected translocations with a focus on strategies for clinical application in surgical pathology practice.
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Affiliation(s)
- Liang Cheng
- Department of Pathology and Laboratory MedicineIndiana University School of MedicineIndianapolisINUSA.,Department of UrologyIndiana University School of MedicineIndianapolisINUSA
| | - Shaobo Zhang
- Department of Pathology and Laboratory MedicineIndiana University School of MedicineIndianapolisINUSA
| | - Lisha Wang
- Michigan Center for Translational PathologyUniversity of MichiganAnn ArborMIUSA
| | - Gregory T MacLennan
- Departments of Pathology and Laboratory MedicineCase Western Reserve UniversityClevelandOHUSA
| | - Darrell D Davidson
- Department of Pathology and Laboratory MedicineIndiana University School of MedicineIndianapolisINUSA
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24
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Gong ZG, Hu J, Wu X, Xu YJ. The Recent Developments in Sample Preparation for Mass Spectrometry-Based Metabolomics. Crit Rev Anal Chem 2017. [PMID: 28631936 DOI: 10.1080/10408347.2017.1289836] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Metabolomics is a critical member in systems biology. Although great progress has been achieved in metabolomics, there are still some problems in sample preparation, data processing and data interpretation. In this review, we intend to explore the roles, challenges and trends in sample preparation for mass spectrometry- (MS-) based metabolomics. The newly emerged sample preparation methods were also critically examined, including laser microdissection, in vivo sampling, dried blood spot, microwave, ultrasound and enzyme-assisted extraction, as well as microextraction techniques. Finally, we provide some conclusions and perspectives for sample preparation in MS-based metabolomics.
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Affiliation(s)
- Zhi-Gang Gong
- a Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences , Shanghai , P. R. China.,b Key Lab of Training , Monitoring and Intervention of Aquatic Sports of General Administration of Sport of P. R. China, Faculty of Physical Education, Jiangxi Normal University , Nanchang , P. R. China
| | - Jing Hu
- a Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences , Shanghai , P. R. China.,c College of Life Science and Technology , Minnan Normal University , Fujian , P. R. China
| | - Xi Wu
- a Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences , Shanghai , P. R. China
| | - Yong-Jiang Xu
- a Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences , Shanghai , P. R. China.,d Department of Medicine , University of California San Diego , La Jolla , California , USA
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25
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Hinneburg H, Schirmeister F, Korać P, Kolarich D. N- and O-Glycomics from Minor Amounts of Formalin-Fixed, Paraffin-Embedded Tissue Samples. Methods Mol Biol 2017; 1503:131-145. [PMID: 27743364 DOI: 10.1007/978-1-4939-6493-2_11] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The availability of well-defined samples in sufficient numbers represents a major bottleneck for any biomarker related research. The utilization of preserved, archived and clinically well-described samples therefore holds a great potential to bridge this gap. This chapter describes a universal workflow for the comprehensive characterization of N- and O-glycans released from whole formalin-fixed, paraffin-embedded tissue sections, including an option for further partitioning using laser microdissection of specific tissue areas/cell populations. Glycoproteins are extracted and subsequently immobilized onto a PVDF membrane prior enzymatic release of N-glycans. Following N-glycan retrieval O-glycans are released using reductive β-elimination from the same sample spot, significantly reducing the required amount of starting material. Released and reduced glycan structures are characterized using porous graphitized carbon liquid chromatography online coupled to an electrospray ionization-ion trap mass spectrometer. This technique provides information on the relative abundances of individual glycans along with detailed structural information, including isomer differentiation and functional epitope characterization of N- and O-glycans obtained from minimal amounts of tissue down to a few thousand cells.
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Affiliation(s)
- Hannes Hinneburg
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, 14424, Potsdam, Germany
- Department of Biology, Chemistry, Pharmacy, Institute of Chemistry and Biochemistry, Freie Universität Berlin, 14195, Berlin, Germany
| | - Falko Schirmeister
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, 14424, Potsdam, Germany
- Department of Biology, Chemistry, Pharmacy, Institute of Chemistry and Biochemistry, Freie Universität Berlin, 14195, Berlin, Germany
| | - Petra Korać
- Faculty of Science, Department of Biology, Division of Molecular Biology, University of Zagreb, Zagreb, Croatia
| | - Daniel Kolarich
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, 14424, Potsdam, Germany.
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26
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Perspectives on testicular germ cell neoplasms. Hum Pathol 2017; 59:10-25. [DOI: 10.1016/j.humpath.2016.08.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 08/09/2016] [Accepted: 08/11/2016] [Indexed: 11/16/2022]
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27
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Yi D, Kong L, Kankala RK, Wang Z. Electrostatic Capture Following Laser Microdissection for the Preparation of Homogeneous Biological Specimens. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2016; 22:1329-1337. [PMID: 27890026 DOI: 10.1017/s143192761601179x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
There is an unmet need for researchers in life sciences and clinical pathology to obtain untainted target cells with very high accuracy, which are suitable for subsequent genome and protein analysis. In this paper, an electrostatic capture laser microdissection technology (ECM) is proposed and explained. Following microscopic identification and separation of target cells from the surrounding tissues using laser cutting, the ECM uses electrostatic forces to capture target cells. Validation experiments indicate that ECM can capture a wide assortment of contamination-free homogeneous samples, ranging from very tiny pieces of a few micrometers in diameter to large pieces with a surface area of over 40,000 µm2. Evidence is also provided indicating that uncontaminated homogeneous tissue materials collected by ECM are suitable for further DNA and RNA analysis. This suggests that ECM capture causes little or no identifiable damage to the collected tissues. This technique has significant advantages compared with existing traditional capture methods, such as very low risk of biological sample damage and the fact that it can be applied to both upright and inverted microscopy. The latter allows for separating target cells in tissue culture. ECM usage provides a cost-effective alternative to more traditional laser capture microdissection techniques.
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Affiliation(s)
- Dingrong Yi
- 1College of Mechanical Engineering and Automation,Huaqiao University,No. 668 Jimei Road,Jimei District,Xiamen,Fujian Province 361021,P. R. China
| | - Linghua Kong
- 1College of Mechanical Engineering and Automation,Huaqiao University,No. 668 Jimei Road,Jimei District,Xiamen,Fujian Province 361021,P. R. China
| | - Ranjith K Kankala
- 2College of Chemical Engineering,Huaqiao University,No. 668 Jimei Road,Jimei District,Xiamen,Fujian Province 361021,P. R. China
| | - Zi Wang
- 1College of Mechanical Engineering and Automation,Huaqiao University,No. 668 Jimei Road,Jimei District,Xiamen,Fujian Province 361021,P. R. China
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28
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Fiorentino M, Scarpelli M, Lopez-Beltran A, Cheng L, Montironi R. Considerations for standardizing predictive molecular pathology for cancer prognosis. Expert Rev Mol Diagn 2016; 17:47-55. [PMID: 27897454 DOI: 10.1080/14737159.2017.1266258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Molecular tests that were once ancillary to the core business of cyto-histopathology are becoming the most relevant workload in pathology departments after histopathology/cytopathology and before autopsies. This has resulted from innovations in molecular biology techniques, which have developed at an incredibly fast pace. Areas covered: Most of the current widely used techniques in molecular pathology such as FISH, direct sequencing, pyrosequencing, and allele-specific PCR will be replaced by massive parallel sequencing that will not be considered next generation, but rather, will be considered to be current generation sequencing. The pre-analytical steps of molecular techniques such as DNA extraction or sample preparation will be largely automated. Moreover, all the molecular pathology instruments will be part of an integrated workflow that traces the sample from extraction to the analytical steps until the results are reported; these steps will be guided by expert laboratory information systems. In situ hybridization and immunohistochemistry for quantification will be largely digitalized as much as histology will be mostly digitalized rather than viewed using microscopy. Expert commentary: This review summarizes the technical and regulatory issues concerning the standardization of molecular tests in pathology. A vision of the future perspectives of technological changes is also provided.
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Affiliation(s)
- Michelangelo Fiorentino
- a Pathology Service , Addarii Institute of Oncology, S. Orsola-Malpighi Hospital , Bologna , Italy
| | - Marina Scarpelli
- b Section of Pathological Anatomy , Marche Polytechnic University, School of Medicine, United Hospitals , Ancona , Italy
| | | | - Liang Cheng
- d Department of Pathology and Laboratory Medicine , Indiana University School of Medicine , Indianapolis , IN , USA
| | - Rodolfo Montironi
- a Pathology Service , Addarii Institute of Oncology, S. Orsola-Malpighi Hospital , Bologna , Italy
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29
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Protein characterization of intracellular target-sorted, formalin-fixed cell subpopulations. Sci Rep 2016; 6:33999. [PMID: 27666089 PMCID: PMC5036045 DOI: 10.1038/srep33999] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 09/01/2016] [Indexed: 12/14/2022] Open
Abstract
Cellular heterogeneity is inherent in most human tissues, making the investigation of specific cell types challenging. Here, we describe a novel, fixation/intracellular target-based sorting and protein extraction method to provide accurate protein characterization for cell subpopulations. Validation and feasibility tests were conducted using homogeneous, neural cell lines and heterogeneous, rat brain cells, respectively. Intracellular proteins of interest were labeled with fluorescent antibodies for fluorescence-activated cell sorting. Reproducible protein extraction from fresh and fixed samples required lysis buffer with high concentrations of Tris-HCl and sodium dodecyl sulfate as well as exposure to high heat. No deterioration in protein amount or quality was observed for fixed, sorted samples. For the feasibility experiment, a primary rat subpopulation of neuronal cells was selected for based on high, intracellular β-III tubulin signal. These cells showed distinct protein expression differences from the unsorted population for specific (phosphorylated tau) and non-specific (total tau) protein targets. Our approach allows for determining more accurate protein profiles directly from cell types of interest and provides a platform technology in which any cell subpopulation can be biochemically investigated.
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30
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Butler LM, Hallström BM, Fagerberg L, Pontén F, Uhlén M, Renné T, Odeberg J. Analysis of Body-wide Unfractionated Tissue Data to Identify a Core Human Endothelial Transcriptome. Cell Syst 2016; 3:287-301.e3. [PMID: 27641958 DOI: 10.1016/j.cels.2016.08.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 05/23/2016] [Accepted: 08/03/2016] [Indexed: 12/11/2022]
Abstract
Endothelial cells line blood vessels and regulate hemostasis, inflammation, and blood pressure. Proteins critical for these specialized functions tend to be predominantly expressed in endothelial cells across vascular beds. Here, we present a systems approach to identify a panel of human endothelial-enriched genes using global, body-wide transcriptomics data from 124 tissue samples from 32 organs. We identified known and unknown endothelial-enriched gene transcripts and used antibody-based profiling to confirm expression across vascular beds. The majority of identified transcripts could be detected in cultured endothelial cells from various vascular beds, and we observed maintenance of relative expression in early passage cells. In summary, we describe a widely applicable method to determine cell-type-specific transcriptome profiles in a whole-organism context, based on differential abundance across tissues. We identify potential vascular drug targets or endothelial biomarkers and highlight candidates for functional studies to increase understanding of the endothelium in health and disease.
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Affiliation(s)
- Lynn Marie Butler
- Institute for Clinical Chemistry and Laboratory Medicine, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany; Clinical Chemistry and Blood Coagulation, Department of Molecular Medicine and Surgery, Karolinska Institute, 171 76 Stockholm, Sweden.
| | - Björn Mikael Hallström
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden
| | - Linn Fagerberg
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden
| | - Fredrik Pontén
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 85 Uppsala, Sweden
| | - Mathias Uhlén
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden
| | - Thomas Renné
- Institute for Clinical Chemistry and Laboratory Medicine, University Medical Centre Hamburg-Eppendorf, 20246 Hamburg, Germany; Clinical Chemistry and Blood Coagulation, Department of Molecular Medicine and Surgery, Karolinska Institute, 171 76 Stockholm, Sweden
| | - Jacob Odeberg
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology (KTH), 171 21 Stockholm, Sweden; Coagulation Unit, Centre for Hematology, Karolinska University Hospital, 171 76 Stockholm, Sweden
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De Marchi T, Liu NQ, Stingl C, Timmermans MA, Smid M, Look MP, Tjoa M, Braakman RBH, Opdam M, Linn SC, Sweep FCGJ, Span PN, Kliffen M, Luider TM, Foekens JA, Martens JWM, Umar A. 4-protein signature predicting tamoxifen treatment outcome in recurrent breast cancer. Mol Oncol 2016; 10:24-39. [PMID: 26285647 PMCID: PMC5528925 DOI: 10.1016/j.molonc.2015.07.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 07/23/2015] [Indexed: 12/02/2022] Open
Abstract
Estrogen receptor (ER) positive tumors represent the majority of breast malignancies, and are effectively treated with hormonal therapies, such as tamoxifen. However, in the recurrent disease resistance to tamoxifen therapy is common and a major cause of death. In recent years, in-depth proteome analyses have enabled identification of clinically useful biomarkers, particularly, when heterogeneity in complex tumor tissue was reduced using laser capture microdissection (LCM). In the current study, we performed high resolution proteomic analysis on two cohorts of ER positive breast tumors derived from patients who either manifested good or poor outcome to tamoxifen treatment upon recurrence. A total of 112 fresh frozen tumors were collected from multiple medical centers and divided into two sets: an in-house training and a multi-center test set. Epithelial tumor cells were enriched with LCM and analyzed by nano-LC Orbitrap mass spectrometry (MS), which yielded >3000 and >4000 quantified proteins in the training and test sets, respectively. Raw data are available via ProteomeXchange with identifiers PXD000484 and PXD000485. Statistical analysis showed differential abundance of 99 proteins, of which a subset of 4 proteins was selected through a multivariate step-down to develop a predictor for tamoxifen treatment outcome. The 4-protein signature significantly predicted poor outcome patients in the test set, independent of predictive histopathological characteristics (hazard ratio [HR] = 2.17; 95% confidence interval [CI] = 1.15 to 4.17; multivariate Cox regression p value = 0.017). Immunohistochemical (IHC) staining of PDCD4, one of the signature proteins, on an independent set of formalin-fixed paraffin-embedded tumor tissues provided and independent technical validation (HR = 0.72; 95% CI = 0.57 to 0.92; multivariate Cox regression p value = 0.009). We hereby report the first validated protein predictor for tamoxifen treatment outcome in recurrent ER-positive breast cancer. IHC further showed that PDCD4 is an independent marker.
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Affiliation(s)
- Tommaso De Marchi
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands; Postgraduate School of Molecular Medicine, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - Ning Qing Liu
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Cristoph Stingl
- Department of Neurology, Erasmus MC, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Mieke A Timmermans
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Marcel Smid
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Maxime P Look
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Mila Tjoa
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Rene B H Braakman
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands; Postgraduate School of Molecular Medicine, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
| | - Mark Opdam
- Division of Medical Oncology, Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.
| | - Sabine C Linn
- Division of Medical Oncology, Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.
| | - Fred C G J Sweep
- Department of Laboratory Medicine, Radboud University Medical Center, PO Box 9101, NL-6500 HB, Nijmegen, The Netherlands.
| | - Paul N Span
- Department of Radiation Oncology, Radboud University Medical Center, PO Box 9101, NL-6500 HB, Nijmegen, The Netherlands.
| | - Mike Kliffen
- Department of Pathology, Maasstad Hospital, Maasstadweg 21, 3079 DZ, Rotterdam, The Netherlands.
| | - Theo M Luider
- Department of Neurology, Erasmus MC, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - John A Foekens
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - John W M Martens
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands; Cancer Genomics Center Netherlands, Amsterdam, The Netherlands.
| | - Arzu Umar
- Department of Medical Oncology, Erasmus MC Cancer Institute, University Medical Center, Wytemaweg 80, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
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Frost AR, Eltoum I, Siegal GP, Emmert‐Buck MR, Tangrea MA. Laser Microdissection. ACTA ACUST UNITED AC 2015; 112:25A.1.1-25A.1.30. [DOI: 10.1002/0471142727.mb25a01s112] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Andra R. Frost
- Department of Pathology, University of Alabama at Birmingham Birmingham Alabama
| | - Isam‐Eldin Eltoum
- Department of Pathology, University of Alabama at Birmingham Birmingham Alabama
| | - Gene P. Siegal
- Department of Pathology, University of Alabama at Birmingham Birmingham Alabama
| | | | - Michael A. Tangrea
- Alvin & Lois Lapidus Cancer Institute, Sinai Hospital Baltimore Maryland
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Recent advances and current issues in single-cell sequencing of tumors. Cancer Lett 2015; 365:1-10. [PMID: 26003306 DOI: 10.1016/j.canlet.2015.04.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 04/19/2015] [Accepted: 04/20/2015] [Indexed: 12/28/2022]
Abstract
Intratumoral heterogeneity is a recently recognized but important feature of cancer that underlies the various biocharacteristics of cancer tissues. The advent of next-generation sequencing technologies has facilitated large scale capture of genomic data, while the recent development of single-cell sequencing has allowed for more in-depth studies into the complex molecular mechanisms of intratumoral heterogeneity. In this review, the recent advances and current challenges in single-cell sequencing methodologies are discussed, highlighting the potential power of these data to provide insights into oncological processes, from tumorigenesis through progression to metastasis and therapy resistance.
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34
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The workflow from post-mortem human brain sampling to cell microdissection: a Brain Net Europe study. J Neural Transm (Vienna) 2015; 122:975-91. [DOI: 10.1007/s00702-015-1378-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 02/04/2015] [Indexed: 11/25/2022]
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Handley A, Schauer T, Ladurner A, Margulies C. Designing Cell-Type-Specific Genome-wide Experiments. Mol Cell 2015; 58:621-31. [DOI: 10.1016/j.molcel.2015.04.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Chabrat A, Doucet-Beaupré H, Lévesque M. RNA Isolation from Cell Specific Subpopulations Using Laser-capture Microdissection Combined with Rapid Immunolabeling. J Vis Exp 2015:52510. [PMID: 25939046 PMCID: PMC4541564 DOI: 10.3791/52510] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Laser capture microdissection (LCM) allows the isolation of specific cells from thin tissue sections with high spatial resolution. Effective LCM requires precise identification of cells subpopulations from a heterogeneous tissue. Identification of cells of interest for LCM is usually based on morphological criteria or on fluorescent protein reporters. The combination of LCM and rapid immunolabeling offers an alternative and efficient means to visualize specific cell types and to isolate them from surrounding tissue. High-quality RNA can then be extracted from a pure cell population and further processed for downstream applications, including RNA-sequencing, microarray or qRT-PCR. This approach has been previously performed and briefly described in few publications. The goal of this article is to illustrate how to perform rapid immunolabeling of a cell population while keeping RNA integrity, and how to isolate these specific cells using LCM. Herein, we illustrated this multi-step procedure by immunolabeling and capturing dopaminergic cells in brain tissue from one-day-old mice. We highlight key critical steps that deserve special consideration. This protocol can be adapted to a variety of tissues and cells of interest. Researchers from different fields will likely benefit from the demonstration of this approach.
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Affiliation(s)
- Audrey Chabrat
- Department of Psychiatry and Neurosciences, Faculty of Medicine, Université Laval; Centre de recherche de l'Institut universitaire en santé mentale de Québec
| | - Hélène Doucet-Beaupré
- Department of Psychiatry and Neurosciences, Faculty of Medicine, Université Laval; Centre de recherche de l'Institut universitaire en santé mentale de Québec
| | - Martin Lévesque
- Department of Psychiatry and Neurosciences, Faculty of Medicine, Université Laval; Centre de recherche de l'Institut universitaire en santé mentale de Québec;
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Zhu Z, Liu T, Han F, Zhan SD, Wang CY. Mutations in the p16 gene in DMBA-induced pancreatic intraepithelial neoplasia and pancreatic cancer in rats. Hepatobiliary Pancreat Dis Int 2015; 14:208-14. [PMID: 25865695 DOI: 10.1016/s1499-3872(15)60331-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND 7, 12-dimethylbenzanthracene (DMBA)-induced pancreatic intraepithelial neoplasia (PanIN) and pancreatic cancer in rats provide a classic model for uncovering the molecular mechanisms underlying pancreatic cancer. However, this model has not been characterized genetically, and in particular, the major genetic alterations in the p16 gene are unknown. METHODS Lesions of PanIN and pancreatic cancer were induced with DMBA implantation in 40 rats, and control pancreatic tissue was obtained from 10 age-matched rats without exposure to DMBA. Pancreatic tissue was harvested three months after DMBA implantation and DNA was extracted. Homozygous deletions and point mutations of the p16 (exons 1 and 2) gene were detected by PCR amplification and direct sequencing. RESULTS DMBA implantation in the 40 rats induced 26 PanINs and 9 carcinomas. The overall frequency of p16 alterations in the pancreatic tissue of these rats was 42.86% (15/35), and the changes were point mutations, not homozygous deletions. p16 mutations were present in 30.77% (8/26) of the rats with PanIN and 77.78% (7/9) of the rats with carcinoma (P<0.05). The increasing incidence of p16 alterations was detected in 20.00% (1/5) of PanIN-1, 28.57% (2/7) of PanIN-2 and 35.71% (5/14) of PanIN-3 lesions. CONCLUSION Our findings indicated that p16 alteration is a common event in the carcinogenesis of this model and that the mutation pattern is analogous to that of human lesions.
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Affiliation(s)
- Zhu Zhu
- Department of Pancreatic Surgery, Union Hospital, Huazhong University of Science and Technology, Wuhan 430022, China.
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38
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García-Nicolás O, Rosales RS, Pallarés FJ, Risco D, Quereda JJ, Graham SP, Frossard JP, Morgan SB, Steinbach F, Drew TW, Strickland TS, Salguero FJ. Comparative analysis of cytokine transcript profiles within mediastinal lymph node compartments of pigs after infection with porcine reproductive and respiratory syndrome genotype 1 strains differing in pathogenicity. Vet Res 2015; 46:34. [PMID: 25889072 PMCID: PMC4364558 DOI: 10.1186/s13567-015-0161-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 02/06/2015] [Indexed: 01/28/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) induces a weak immune response enabling it to persist in different organs of infected pigs. This has been attributed to the ability of PRRSV to influence the induction of cytokine responses. In this study, we investigated the cytokine transcriptional profiles in different compartments of the mediastinal lymph node of pigs infected with three genotype 1 PRRSV strains of differing pathogenicity: the low virulence prototype Lelystad virus (LV), and UK field strain 215–06 and the highly virulent subtype 3 SU1-Bel isolate from Belarus. We have used a combination of laser capture micro-dissection (LCM) followed by real time quantitative PCR (RT-qPCR) and immunohistochemical (IHC) detection of immune cell markers (CD3, CD79a and MAC387) and RT-qPCR quantification of PRRSV and cytokine transcripts. Compared to mock infected pigs, we found a significant downregulation of TNF-α and IFN-α in follicular and interfollicular areas of the mediastinal lymph node from 3 days post-infection (dpi) in animals infected with all three strains. This was accompanied by a transient B cell depletion and T cell and macrophage infiltration in the follicles together with T cell depletion in the interfollicular areas. A delayed upregulation of IFN-γ and IL-23p19 was observed mainly in the follicles. The PRRSV load was higher in all areas and time-points studied in the animals infected with the SU1-Bel strain. This paper describes the first application of LCM to study the cytokine transcript profiles and virus distribution in different compartments of the lymph node of pigs.
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Affiliation(s)
- Obdulio García-Nicolás
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Murcia University, "Mare Nostrum Excellence Campus - 3738", 30100, Murcia, Spain.
| | - Rubén S Rosales
- Department of Bacteriology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Francisco J Pallarés
- Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Murcia University, "Mare Nostrum Excellence Campus - 3738", 30100, Murcia, Spain.
| | - David Risco
- Red de Grupos de Investigación Recursos Faunísticos, Facultad de Veterinaria, Universidad de Extremadura, 10003, Cáceres, Spain.
| | - Juan J Quereda
- Spanish National Center of Biotechnology (CSIC), C/Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain.
| | - Simon P Graham
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Jean-Pierre Frossard
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Sophie B Morgan
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Falko Steinbach
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK. .,Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, GU2 7TE, UK.
| | - Trevor W Drew
- Department of Virology, Animal and Plant Health Agency, Addlestone, Surrey, KT15 3NB, UK.
| | - Tony S Strickland
- Department of Pathology, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK.
| | - Francisco J Salguero
- Department of Pathology, Animal and Plant Health Agency, Addlestone, KT15 3NB, UK. .,Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, GU2 7TE, UK.
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Groh KJ, Suter MJF. Stressor-induced proteome alterations in zebrafish: a meta-analysis of response patterns. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 159:1-12. [PMID: 25498419 DOI: 10.1016/j.aquatox.2014.11.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 11/05/2014] [Accepted: 11/18/2014] [Indexed: 06/04/2023]
Abstract
Proteomics approaches are being increasingly applied in ecotoxicology on the premise that the identification of specific protein expression changes in response to a particular chemical would allow elucidation of the underlying molecular pathways leading to an adverse effect. This in turn is expected to promote the development of focused testing strategies for specific groups of toxicants. Although both gel-based and gel-free global characterization techniques provide limited proteome coverage, the conclusions regarding the cellular processes affected are still being drawn based on the few changes detected. To investigate how specific the detected responses are, we analyzed a set of studies that characterized proteome alterations induced by various physiological, chemical and biological stressors in zebrafish, a popular model organism. Our analysis highlights several proteins and protein groups, including heat shock and oxidative stress defense proteins, energy metabolism enzymes and cytoskeletal proteins, to be most frequently identified as responding to diverse stressors. In contrast, other potentially more specifically responding protein groups are detected much less frequently. Thus, zebrafish proteome responses to stress reported by different studies appear to depend mostly on the level of stress rather than on the specific stressor itself. This suggests that the most broadly used current proteomics technologies do not provide sufficient proteome coverage to allow in-depth investigation of specific mechanisms of toxicant action. We suggest that the results of any differential proteomics experiment performed with zebrafish should be interpreted keeping in mind the list of the most frequent responders that we have identified. Similar reservations should apply to any other species where proteome responses are analyzed by global proteomics methods. Careful consideration of the reliability and significance of observed changes is necessary in order not to over-interpret the experimental results and to prevent the proliferation of false positive linkages between the chemical and the cellular functions it perturbs. We further discuss the implications of the identified "top lists" of frequently responding proteins and protein families, and suggest further directions for proteomics research in ecotoxicology. Apart from improving the proteome coverage, further research should focus on defining the significance of the observed stress response patterns for organism phenotypes and on searching for common upstream regulators that can be targeted by specific assays.
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Affiliation(s)
- Ksenia J Groh
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland; ETH Zürich, Swiss Federal Institute of Technology, Department of Chemistry and Applied Biosciences, 8093 Zürich, Switzerland.
| | - Marc J-F Suter
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland; ETH Zürich, Swiss Federal Institute of Technology, Department of Environmental Systems Science, 8092 Zürich, Switzerland
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40
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Zeng Q, Smith DJ, Shippy SA. Proteomic analysis of individual fruit fly hemolymph. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 981-982:33-9. [DOI: 10.1016/j.jchromb.2014.11.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 11/12/2014] [Accepted: 11/25/2014] [Indexed: 11/16/2022]
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Wojakowska A, Chekan M, Widlak P, Pietrowska M. Application of metabolomics in thyroid cancer research. Int J Endocrinol 2015; 2015:258763. [PMID: 25972898 PMCID: PMC4417976 DOI: 10.1155/2015/258763] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 03/27/2015] [Indexed: 01/10/2023] Open
Abstract
Thyroid cancer is the most common endocrine malignancy with four major types distinguished on the basis of histopathological features: papillary, follicular, medullary, and anaplastic. Classification of thyroid cancer is the primary step in the assessment of prognosis and selection of the treatment. However, in some cases, cytological and histological patterns are inconclusive; hence, classification based on histopathology could be supported by molecular biomarkers, including markers identified with the use of high-throughput "omics" techniques. Beside genomics, transcriptomics, and proteomics, metabolomic approach emerges as the most downstream attitude reflecting phenotypic changes and alterations in pathophysiological states of biological systems. Metabolomics using mass spectrometry and magnetic resonance spectroscopy techniques allows qualitative and quantitative profiling of small molecules present in biological systems. This approach can be applied to reveal metabolic differences between different types of thyroid cancer and to identify new potential candidates for molecular biomarkers. In this review, we consider current results concerning application of metabolomics in the field of thyroid cancer research. Recent studies show that metabolomics can provide significant information about the discrimination between different types of thyroid lesions. In the near future, one could expect a further progress in thyroid cancer metabolomics leading to development of molecular markers and improvement of the tumor types classification and diagnosis.
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Affiliation(s)
- Anna Wojakowska
- Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, 44-101 Gliwice, Poland
| | - Mykola Chekan
- Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, 44-101 Gliwice, Poland
| | - Piotr Widlak
- Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, 44-101 Gliwice, Poland
| | - Monika Pietrowska
- Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, 44-101 Gliwice, Poland
- *Monika Pietrowska:
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Abstract
The increasing interest towards cellular heterogeneity within cell populations has pushed the development of new protocols to isolate and analyze single cells. PCR-based amplification techniques are widely used in this field. However, setting up an experiment and analyzing the results can sometimes be challenging. The aim of this chapter is to provide a general overview on single-cell PCR analysis focusing on the potential pitfalls and on the possible solutions to successfully perform the analysis.
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Bhandari DR, Schott M, Römpp A, Vilcinskas A, Spengler B. Metabolite localization by atmospheric pressure high-resolution scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging in whole-body sections and individual organs of the rove beetle Paederus riparius. Anal Bioanal Chem 2014; 407:2189-201. [PMID: 25424178 PMCID: PMC4357651 DOI: 10.1007/s00216-014-8327-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/04/2014] [Accepted: 11/06/2014] [Indexed: 11/25/2022]
Abstract
Mass spectrometry imaging provides for non-targeted, label-free chemical imaging. In this study, atmospheric pressure high-resolution scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging (AP-SMALDI MSI) was used for the first time to describe the chemical distribution of the defensive compounds pederin, pseudopederin, and pederon in tissue sections (16 μm thick) of the rove beetle Paederus riparius. The whole-insect tissue section was scanned with a 20-μm step size. Mass resolution of the orbital trapping mass spectrometer was set to 100,000 at m/z 200. Additionally, organ-specific compounds were identified for brain, nerve cord, eggs, gut, ovaries, and malpighian tubules. To confirm the distribution of the specific compounds, individual organs from the insect were dissected, and MSI experiments were performed on the dissected organs. Three ganglia of the nerve cord, with a dimension of 250–500 μm, were measured with 10-μm spatial resolution. High-quality m/z images, based on high spatial resolution and high mass accuracy were generated. These features helped to assign mass spectral peaks with high confidence. Mass accuracy of the imaging experiments was <3 ppm root mean square error, and mapping of different compound classes from a single experiment was possible. This approach improved the understanding of the biochemistry of P. riparius. Concentration differences and distributions of pederin and its analogues could be visualized in the whole-insect section. Without any labeling, we assigned key lipids for specific organs to describe their location in the body and to identify morphological structures with a specificity higher than with staining or immunohistology methods.
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Affiliation(s)
- Dhaka Ram Bhandari
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Schubertstraße 60, Building 16, 35392 Giessen, Germany
| | - Matthias Schott
- Institute of Phytopathology and Applied Zoology, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Andreas Römpp
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Schubertstraße 60, Building 16, 35392 Giessen, Germany
| | - Andreas Vilcinskas
- Institute of Phytopathology and Applied Zoology, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Bernhard Spengler
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Schubertstraße 60, Building 16, 35392 Giessen, Germany
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Development and validation of a microRNA based diagnostic assay for primary tumor site classification of liver core biopsies. Mol Oncol 2014; 9:68-77. [PMID: 25131495 DOI: 10.1016/j.molonc.2014.07.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/11/2014] [Accepted: 07/21/2014] [Indexed: 11/20/2022] Open
Abstract
Identification of the primary tumor site in patients with metastatic cancer is clinically important, but remains a challenge. Hence, efforts have been made towards establishing new diagnostic tools. Molecular profiling is a promising diagnostic approach, but tissue heterogeneity and inadequacy may negatively affect the accuracy and usability of molecular classifiers. We have developed and validated a microRNA-based classifier, which predicts the primary tumor site of liver biopsies, containing a limited number of tumor cells. Concurrently we explored the influence of surrounding normal tissue on classification. MicroRNA profiling was performed using quantitative Real-Time PCR on formalin-fixed paraffin-embedded samples. 278 primary tumors and liver metastases, representing nine primary tumor classes, as well as normal liver samples were used as a training set. A statistical model was applied to adjust for normal liver tissue contamination. Performance was estimated by cross-validation, followed by independent validation on 55 liver core biopsies with a tumor content as low as 10%. A microRNA classifier developed, using the statistical contamination model, showed an overall classification accuracy of 74.5% upon independent validation. Two-thirds of the samples were classified with high-confidence, with an accuracy of 92% on high-confidence predictions. A classifier trained without adjusting for liver tissue contamination, showed a classification accuracy of 38.2%. Our results indicate that surrounding normal tissue from the biopsy site may critically influence molecular classification. A significant improvement in classification accuracy was obtained when the influence of normal tissue was limited by application of a statistical contamination model.
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45
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Norris JL, Caprioli RM. Imaging mass spectrometry: a new tool for pathology in a molecular age. Proteomics Clin Appl 2014; 7:733-8. [PMID: 24178781 DOI: 10.1002/prca.201300055] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 08/15/2013] [Accepted: 08/21/2013] [Indexed: 12/28/2022]
Abstract
Mass spectrometry (MS) provides unique advantages for the analysis of clinical specimens, and these capabilities have been critical to the advancement of diagnostic medicine. To date, LC-MS is the MS platform most commonly used for diagnostics; however, LC-MS based proteomics is very labor intensive and costly to implement for high volume assays. Furthermore, when analyzing tissue samples, additional laborious sample preparation steps must be employed (e.g. extraction methods or laser microdissection). The direct analysis of cells and tissues by MALDI imaging MS has developed significant momentum for applications that have diagnostic potential. MALDI imaging MS provides molecular information from specific cell types within tissue sections; however, this laser-based approach significantly reduces the analysis time for each location sampled. This Viewpoint discusses the technologies for direct analysis of tissues, the potential for diagnostic applications using MALDI imaging MS, and the challenges faced in the transfer of the technology to the clinical laboratory.
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Affiliation(s)
- Jeremy L Norris
- Department of Biochemistry, National Research Resource for Imaging Mass Spectrometry, Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, TN
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Catlin NR, Huse SM, Boekelheide K. The stage-specific testicular germ cell apoptotic response to low-dose X-irradiation and 2,5-hexanedione combined exposure. I: Validation of the laser capture microdissection method for qRT-PCR array application. Toxicol Pathol 2014; 42:1221-8. [PMID: 24717900 DOI: 10.1177/0192623314526319] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Over the past decade, laser capture microdissection (LCM) has grown as a tool for gene expression profiling of small numbers of cells from tumor samples and of specific cell populations in complex tissues. LCM can be used to study toxicant effects on selected cell populations within the testis at different stages of spermatogenesis. There are several LCM-related hurdles to overcome, including issues inherent to the method itself, as well as biases that result from amplifying the LCM-isolated RNA. Many technical issues associated with the LCM method are addressed here, including increasing RNA yield and obtaining more accurate quantification of RNA yields. We optimized the LCM method optimized to generate RNA quantities sufficient for quantitative reverse transcription polymerase chain reaction (qRT-PCR) array analysis without amplification and were able to validate the method through direct comparison of results from unamplified and amplified RNA from individual samples. The addition of an amplification step for gene expression studies using LCM RNA resulted in a bias, especially for low abundance transcripts. Although the amplification bias was consistent across samples, researchers should use caution when comparing results generated from amplified and unamplified LCM RNA. Here, we have validated the use of LCM-derived RNA with the qRT-PCR array, improving our ability to investigate cell-type and stage-specific responses to toxicant exposures.
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Affiliation(s)
- Natasha R Catlin
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - Susan M Huse
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - Kim Boekelheide
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
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Kohen R, Dobra A, Tracy JH, Haugen E. Transcriptome profiling of human hippocampus dentate gyrus granule cells in mental illness. Transl Psychiatry 2014; 4:e366. [PMID: 24594777 PMCID: PMC3966046 DOI: 10.1038/tp.2014.9] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 01/06/2014] [Indexed: 12/20/2022] Open
Abstract
This study is, to the best of our knowledge, the first application of whole transcriptome sequencing (RNA-seq) to cells isolated from postmortem human brain by laser capture microdissection. We investigated the transcriptome of dentate gyrus (DG) granule cells in postmortem human hippocampus in 79 subjects with mental illness (schizophrenia, bipolar disorder, major depression) and nonpsychiatric controls. We show that the choice of normalization approach for analysis of RNA-seq data had a strong effect on results; under our experimental conditions a nonstandard normalization method gave superior results. We found evidence of disrupted signaling by miR-182 in mental illness. This was confirmed using a novel method of leveraging microRNA genetic variant information to indicate active targeting. In healthy subjects and those with bipolar disorder, carriers of a high- vs those with a low-expressing genotype of miR-182 had different levels of miR-182 target gene expression, indicating an active role of miR-182 in shaping the DG transcriptome for those subject groups. By contrast, comparing the transcriptome between carriers of different genotypes among subjects with major depression and schizophrenia suggested a loss of DG miR-182 signaling in these conditions.
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Affiliation(s)
- R Kohen
- Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA,Department of Psychiatry and Behavioral Sciences, University of Washington, 1959 Pacific Avenue NE, Seattle, WA 98195-6560, USA. E-mail:
| | - A Dobra
- Department of Statistics, University of Washington, Seattle, WA, USA,Department of Biobehavioral Nursing and Health Systems, University of Washington, Seattle, WA, USA,Center for Statistics and The Social Sciences, University of Washington, Seattle, WA, USA
| | - J H Tracy
- Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA
| | - E Haugen
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
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Mueller C, deCarvalho AC, Mikkelsen T, Lehman NL, Calvert V, Espina V, Liotta LA, Petricoin EF. Glioblastoma cell enrichment is critical for analysis of phosphorylated drug targets and proteomic-genomic correlations. Cancer Res 2013; 74:818-28. [PMID: 24346432 DOI: 10.1158/0008-5472.can-13-2172] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The quality of cancer genomic and proteomic data relies upon the quality of the clinical specimens examined. Here, we show that data derived from non-microdissected glioblastoma multiforme tumor tissue is either masked or not accurate, producing correlations between genomic and proteomic data that lead to false classifications for therapeutic stratification. We analyzed the level of 133 key signaling proteins and phosphoproteins in laser capture microdissected (LCM) primary tumors from a study set of tissues used for the Cancer Genome Atlas (TCGA) profiling efforts, comparing the results to tissue-matched, nontumor cell-enriched lysates from adjacent sections. Among the analytes, 44%, including targets for clinically important inhibitors, such as phosphorylated mTOR, AKT, STAT1, VEGFR2, or BCL2, differed between matched tumor cell-enriched and nonenriched specimens (even in tumor sections with 90% tumor cell content). While total EGFR protein levels were higher in tumors with EGFR mutations, regardless of tumor cell enrichment, EGFR phosphorylation was increased only in LCM-enriched tumor specimens carrying EGFR mutations. Phosphorylated and total PTEN, which is highly expressed in normal brain, was reduced only in LCM-enriched tumor specimens with either PTEN mutation or loss in PTEN copy number, with no differences observed in non-microdissected samples. These results were confirmed in an independent, non-microdissected, publicly available protein data set from the TCGA database. Our findings highlight the necessity for careful upfront cellular enrichment in biospecimens that form the basis for targeted therapy selection and for molecular characterization efforts such as TCGA.
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Affiliation(s)
- Claudius Mueller
- Authors' Affiliations: Center for Applied Proteomics and Molecular Medicine, George Mason University, Manassas, Virginia; Departments of Neurosurgery, Henry Ford Hospital, Detroit; and Pathology, Henry Ford Hospital, Detroit, Michigan
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Maes RK, Langohr IM, Wise AG, Smedley RC, Thaiwong T, Kiupel M. Beyond H&E: integration of nucleic acid-based analyses into diagnostic pathology. Vet Pathol 2013; 51:238-56. [PMID: 24129897 DOI: 10.1177/0300985813505878] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Veterinary pathology of infectious, particularly viral, and neoplastic diseases has advanced significantly with the advent of newer molecular methodologies that can detect nucleic acid of infectious agents within microscopic lesions, differentiate neoplastic from nonneoplastic cells, or determine the suitability of a targeted therapy by detecting specific mutations in certain cancers. Polymerase chain reaction-based amplification of DNA or RNA and in situ hybridization are currently the most commonly used methods for nucleic acid detection. In contrast, the main methodology used for protein detection within microscopic lesions is immunohistochemistry. Other methods that allow for analysis of nucleic acids within a particular cell type or individual cells, such as laser capture microdissection, are also available in some laboratories. This review gives an overview of the factors that influence the accurate analysis of nucleic acids in formalin-fixed tissues, as well as of different approaches to detect such targets.
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Affiliation(s)
- R K Maes
- College of Veterinary Medicine, Michigan State University, 4125 Beaumont Road, Lansing, MI 48910, USA. and
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Martins RP, Lorenzi V, Arce C, Lucena C, Carvajal A, Garrido JJ. Innate and adaptive immune mechanisms are effectively induced in ileal Peyer's patches of Salmonella typhimurium infected pigs. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2013; 41:100-104. [PMID: 23644015 DOI: 10.1016/j.dci.2013.04.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 04/23/2013] [Accepted: 04/24/2013] [Indexed: 06/02/2023]
Abstract
In this report we employed laser-capture microdissection (LCM) coupled to qPCR technology and bioinformatic analysis to characterize, for the first time, the response of Peyer's patches (PP) from orally infected animals to Salmonella typhimurium, in a model of non-typhoidal salmonellosis. Pathogen was highly found in the cytoplasm of phagocytes in PP and differential gene expression analysis indicated an up-regulation of proinflammatory molecules, establishment of a Th1 driven response and triggering of DC and T-cell activity. Furthermore, predictions by bioinformatic analysis pointed to an activation of processes regarding stimulation and maturation of DC, influx of leukocytes in tissue and T lymphocytes priming and differentiation. In short, the approach used in this study proved to be a promising strategy to explore infectious processes. Indeed, it revealed an effective induction of innate and adaptive immune mechanisms in swine PP which appear to be distinct from those observed in mesenteric lymph nodes and closely related to response of gut mucosa.
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Affiliation(s)
- Rodrigo Prado Martins
- Grupo de Genómica y Mejora Animal, Departamento de Genética, Facultad de Veterinaria, Universidad de Córdoba, Campus de Rabanales, Edificio Gregor Mendel C5, 14071 Córdoba, Spain
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