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Nishio M, Tsukamoto S, Kodama T, Shigeoka M, Koma YI, Yokozaki H. Pseudoimmunofluorescent immunohistochemistry image analysis of phosphorylated signaling proteins in human esophageal squamous cell carcinoma tissue. Pathol Int 2024; 74:139-145. [PMID: 38258897 DOI: 10.1111/pin.13407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/20/2023] [Accepted: 01/06/2024] [Indexed: 01/24/2024]
Abstract
Immunohistochemistry is primarily employed to visualize the localization of specific molecules in tissue samples. However, there is an increasing need for software-assisted quantitative assessment. In the present study, we performed inverted blue channel-based pseudoimmunofluorescence image analysis using original immunohistochemistry images. In human esophageal squamous cell carcinoma tissues, various humoral factors promote the phosphorylation of signaling proteins, including protein kinase B (Akt) and/or extracellular signal-regulated kinase 1/2 (ERK1/2), leading to tumor progression. Our method demonstrated applicability in the analysis of localized signaling proteins in histological sections. Relatively high phosphorylated Akt (p-Akt) intensity was observed in the cancer-stroma adjacent (Adj) and noncancerous regions of the superficial layer (SL). Furthermore, localized phosphorylated ERK1/2 (Thr202/Tyr204) was observed in the Adj of the SL and invasive front, distinct from the pattern of p-Akt (Ser473) and p-Akt (Thr308). In conclusion, pseudoimmunofluorescent immunohistochemistry image analysis is useful for the quantitative assessment and objective interpretation of localized signaling proteins in esophageal squamous cell carcinoma. The method can also be applied to analyze various immunohistochemistry images from diverse tissues.
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Affiliation(s)
- Mari Nishio
- Division of Pathology, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shuichi Tsukamoto
- Division of Pathology, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takayuki Kodama
- Division of Pathology, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Manabu Shigeoka
- Division of Pathology, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yu-Ichiro Koma
- Division of Pathology, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroshi Yokozaki
- Division of Pathology, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
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Linkova N, Diatlova A, Zinchenko Y, Kornilova A, Snetkov P, Morozkina S, Medvedev D, Krasichkov A, Polyakova V, Yablonskiy P. Pulmonary Sarcoidosis: Experimental Models and Perspectives of Molecular Diagnostics Using Quantum Dots. Int J Mol Sci 2023; 24:11267. [PMID: 37511027 PMCID: PMC10379333 DOI: 10.3390/ijms241411267] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
Sarcoidosis is a complex inflammatory multisystem disease of unknown etiology that is characterised by epithelioid cell granulomatous lesions affecting various organs, mainly the lungs. In general, sarcoidosis is asymptomatic, but some cases result in severe complications and organ failure. So far, no accurate and validated modelling for clinical and pathohistological manifestations of sarcoidosis is suggested. Moreover, knowledge about disease-specific diagnostic markers for sarcoidosis is scarce. For instance, pulmonary granulomatosis is associated with the upregulated production of proinflammatory molecules: TNF-α, IL-6, CXCL1, CCL2, CCL18, CD163, serum angiotensin-converting enzyme (sACE), lysozyme, neopterin, and serum amyloid A (SAA). Quantum dots (QDs) are widely applied for molecular diagnostics of various diseases. QDs are semiconductor nanoparticles of a few nanometres in size, made from ZnS, CdS, ZnSe, etc., with unique physical and chemical properties that are useful for the labelling and detection in biological experiments. QDs can conjugate with various antibodies or oligonucleotides, allowing for high-sensitivity detection of various targets in organs and cells. Our review describes existing experimental models for sarcoidosis (in vitro, in vivo, and in silico), their advantages and restrictions, as well as the physical properties of quantum dots and their potential applications in the molecular diagnostics of sarcoidosis. The most promising experimental models include mice with TSC2 deletion and an in silico multiscale computational model of sarcoidosis (SarcoidSim), developed using transcriptomics and flow cytometry of human sarcoid biopsies. Both models are most efficient to test different candidate drugs for sarcoidosis.
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Affiliation(s)
- Natalia Linkova
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
- St. Petersburg Institute of Bioregulation and Gerontology, Dynamo pr., 3, 197110 Saint Petersburg, Russia
| | - Anastasiia Diatlova
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
| | - Yulia Zinchenko
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
| | - Anastasiia Kornilova
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
| | - Petr Snetkov
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
- Chemical Bioengineering Center, ITMO University, Kronverksky Pr, 49A, 197101 Saint Petersburg, Russia
| | - Svetlana Morozkina
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
- Chemical Bioengineering Center, ITMO University, Kronverksky Pr, 49A, 197101 Saint Petersburg, Russia
| | - Dmitrii Medvedev
- St. Petersburg Institute of Bioregulation and Gerontology, Dynamo pr., 3, 197110 Saint Petersburg, Russia
| | - Alexandr Krasichkov
- Department of Radio Engineering Systems, Electrotechnical University "LETI", Prof. Popova Street 5F, 197022 Saint Petersburg, Russia
| | - Victoria Polyakova
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
| | - Piotr Yablonskiy
- St. Petersburg Research Institute of Phthisiopulmonology, Ligovskii Prospect, 2-4, 191036 Saint Petersburg, Russia
- Department of Hospital Surgery of the Faculty of Medicine, St. Petersburg State University, University Embankment, 7-9, 199034 Saint Petersburg, Russia
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Bartlová M, Tremlová B, Marcinčák S, Pospiech M. Detection of Carrageenan in Meat Products Using Lectin Histochemistry. Foods 2021; 10:foods10040764. [PMID: 33916705 PMCID: PMC8065968 DOI: 10.3390/foods10040764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 03/23/2021] [Accepted: 03/31/2021] [Indexed: 01/03/2023] Open
Abstract
Carrageenan is a polysaccharide that is widely used in the food industry. Due to its water holding capacity, there is a higher risk of adulteration for economic reasons related to it. A verifiable method for detecting carrageenan is still missing in the food inspection sector. The detection of carrageenan in meat products is not well described. Our study describes lectin histochemistry as a novel approach for carrageenan detection. Within this study, the detection of carrageenan in meat products by lectin histochemistry is validated. Lectins of Arachis hypogaea (PNA) and Bandeiraea simlicifolia (BSA), specific for galactose units of carrageenan, were used. The samples included model meat products (ground chicken-meat products) and meat products from retail markets (chicken and pork hams, sausages, salami, and dried sausages). The limit of determination (LoD) of this method was set at 0.01 g kg-1. The method sensitivity for lectin PNA reached 1, and, for lectin BSA, it reached 0.96. Method specificity for lectin PNA was 1, and, for lectin BSA, it was 1.33. Cross-reactivity with other hydrocolloids tested was not confirmed. The results confirm that lectin histochemistry is suitable for detecting carrageenan in meat products.
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Affiliation(s)
- Marie Bartlová
- Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackého tr. 1946/1, 61242 Brno, Czech Republic; (M.B.); (B.T.)
| | - Bohuslava Tremlová
- Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackého tr. 1946/1, 61242 Brno, Czech Republic; (M.B.); (B.T.)
| | - Slavomír Marcinčák
- Department of Food Hygiene and Technology, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 04181 Košice, Slovakia;
| | - Matej Pospiech
- Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackého tr. 1946/1, 61242 Brno, Czech Republic; (M.B.); (B.T.)
- Correspondence: ; Tel.: +420-541-562-704
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Kalčáková L, Pospiech M, Tremlová B, Javůrková Z, Chernukha I. Development of Immunohistochemical Methods for Casein Detection in Meat Products. Foods 2020; 10:E28. [PMID: 33374134 PMCID: PMC7824696 DOI: 10.3390/foods10010028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/19/2020] [Accepted: 12/22/2020] [Indexed: 11/30/2022] Open
Abstract
To increase production efficiency of meat products, milk protein additives are often used. Despite a number of advantages, use of dairy ingredients involves a certain risk, namely the allergenic potential of milk proteins. A number of methods have been developed to detect milk-origin raw materials in foodstuffs, including immunological reference methods. This study presents newly developed immunohistochemical (IHC) methods for casein detection in meat products. Casein was successfully detected directly in meat products where sensitivity was determined at 1.21 and specificity at 0.28. The results obtained from the IHC were compared with the Enzyme-Linked Immuno Sorbent Assay (ELISA) and there was no statistically significant difference between the IHC and ELISA methods (p > 0.05). The correspondence between the methods was 72% in total. The highest correspondence was reached in frankfurters (90%), the lowest in canned pâté (44%).
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Affiliation(s)
- Ludmila Kalčáková
- Department of Plant Origin Foodstuffs Hygiene and Technology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, 612 24 Brno, Czech Republic; (L.K.); (M.P.); (B.T.)
| | - Matej Pospiech
- Department of Plant Origin Foodstuffs Hygiene and Technology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, 612 24 Brno, Czech Republic; (L.K.); (M.P.); (B.T.)
| | - Bohuslava Tremlová
- Department of Plant Origin Foodstuffs Hygiene and Technology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, 612 24 Brno, Czech Republic; (L.K.); (M.P.); (B.T.)
| | - Zdeňka Javůrková
- Department of Plant Origin Foodstuffs Hygiene and Technology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, 612 24 Brno, Czech Republic; (L.K.); (M.P.); (B.T.)
| | - Irina Chernukha
- The V.M. Gorbatov Federal Research Center for Food Systems of Russian Academy of Sciences, Talalikhina ul. 26, 109316 Moscow, Russia;
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A field-applicable colorimetric assay for notorious explosive triacetone triperoxide through nanozyme-catalyzed irreversible oxidation of 3, 3'-diaminobenzidine. Mikrochim Acta 2020; 187:431. [PMID: 32632565 DOI: 10.1007/s00604-020-04409-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 06/23/2020] [Indexed: 10/23/2022]
Abstract
A field-applicable colorimetric assay for fast detection of notorious explosive triacetone triperoxide (TATP) has been developed through the selective irreversible oxidation of 3, 3'-diaminobenzidine by hydrogen peroxide (HP) liberated during the acidic hydrolysis/degradation of TATP in the presence of MnO2 nanozymes. The generated HP was detected by probing the absorbance of the product (indamine polymer) of the 3, 3'-diaminobenzidine (DAB) oxidation reaction at 460.0 nm. The UV-Vis measurements provided a linear range from 1.57 to 10.50 mg L-1 TATP with a detection limit of 0.34 mg L-1. The oxidation of DAB cannot proceed by molecular oxygen, thus it is selectively oxidized by H2O2; this prevents false-positive results from laundry detergents (containing O2-releasing substances). Moreover, a naked-eye field test was developed, and a fast spot test analyzing time of 5 s was achieved. The selectivity of the assay was checked by analyzing some synthetic samples prepared with a laundry detergent as camouflage. The results of the developed assay revealed quantitative recoveries for TATP whereas the standard nanozyme-based method showed significant false-positive results. Graphical abstract.
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A novel selective and sensitive multinanozyme colorimetric method for glutathione detection by using an indamine polymer. Anal Chim Acta 2020; 1127:1-8. [PMID: 32800112 DOI: 10.1016/j.aca.2020.06.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 11/22/2022]
Abstract
A sensitive and selective novel multinanozyme colorimetric method for glutathione (GSH) detection was developed. MnO2-nanozymes can catalyze the oxidation reaction of 3, 3՛-diaminobenzidine (DAB) and produce a brown indamine polymer. In the presence of GSH, this reaction slowly proceeds. When Au-nanozymes was used as peroxidase mimic along with MnO2-nanozymes, the analytical signal and selectivity (particularly, over Cys and AA) were significantly improved for GSH detection. Therefore, this novel multinanozyme system was further developed through optimization for the colorimetric detection of GSH. The calibration curve presented two wide linear range from 0.05 to 0.19 and 0.19-11.35 mg L̶ 1 with a very low detection limit of 0.02 mg L̶ 1 (5 nM) for GSH. The developed method was employed for human serum analysis without any dilution and any deproteinization.
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Poß M, Zittel E, Meschkov A, Schepers U, Feldmann C. Fluorescent Sulfonate-Based Inorganic-Organic Hybrid Nanoparticles for Staining and Imaging. Bioconjug Chem 2018; 29:2818-2828. [PMID: 30004681 DOI: 10.1021/acs.bioconjchem.8b00423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sulfonate-based inorganic-organic hybrid nanoparticles (IOH-NPs) with the general saline composition [Gd(OH)]2+n/2[ Rdye(SO3) n] n- showing optical absorption and emission in the blue to red spectral regime are presented for the first time. All IOH-NPs are prepared via straightforward aqueous synthesis and instantaneously result in colloidally highly stable suspensions with mean particle diameters of 40-50 nm and high zeta potentials (-20 to -40 mV at pH 7.0). Specifically, the IOH-NPs comprise [Gd(OH)]2+2[CSB]4-, [Gd(OH)]2+2[DB71]4-, [Gd(OH)]2+[NFR]2-, [Gd(OH)]2+[AR97]2-, and [Gd(OH)]2+2[EB]4- showing blue, orange, red, and infrared absorption and emission ([CSB]: Chicago Sky Blue; [DB71]: Direct Blue 71; [NFR]: Nuclear Fast Red; [AR97]: Acid Red 97; [EB]: Evans Blue). The novel IOH-NPs are characterized by electron microscopy, dynamic light scattering, infrared spectroscopy, energy-dispersive X-ray analysis, thermogravimetry, elemental analysis, and fluorescence spectroscopy. In vitro studies based on HeLa and HUVEC cells were exemplarily performed with [Gd(OH)]2+2[EB]4- IOH-NPs and show intense fluorescence and only moderate toxicity at concentrations of 1 to 10 μg/mL. Based on aqueous synthesis, good colloidal stability, absence of severely toxic metals (e.g., Cd2+, Pb2+), use of molecular dyes that are already known for staining in cell biology and histology, extremely high dye load per nanoparticle (70-80 wt %), and blue to red absorption and fluorescence, the sulfonate-based IOH-NPs can be highly interesting for staining, fluorescence microscopy, and optical imaging.
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Affiliation(s)
- Marieke Poß
- Institut für Anorganische Chemie , Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15 , 76131 Karlsruhe , Germany
| | - Eva Zittel
- Institute of Toxicology and Genetics , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
| | - Anna Meschkov
- Institute of Toxicology and Genetics , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
| | - Ute Schepers
- Institute of Toxicology and Genetics , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany.,Institute of Organic Chemistry , Karlsruhe Institute of Technology (KIT) , Fritz-Haber Weg 6 , 76131 Karlsruhe , Germany
| | - Claus Feldmann
- Institut für Anorganische Chemie , Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15 , 76131 Karlsruhe , Germany
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Cao Y, Yang M, Ma W, Sun Y, Chen G. Overexpression of SSB Xoc, a Single-Stranded DNA-Binding Protein From Xanthomonas oryzae pv. oryzicola, Enhances Plant Growth and Disease and Salt Stress Tolerance in Transgenic Nicotiana benthamiana. FRONTIERS IN PLANT SCIENCE 2018; 9:953. [PMID: 30026748 PMCID: PMC6041465 DOI: 10.3389/fpls.2018.00953] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 06/13/2018] [Indexed: 05/05/2023]
Abstract
We previously reported that SSBXoc, a highly conserved single-stranded DNA-binding protein from Xanthomonas spp., was secreted through the type III secretion system (T3SS) and functioned as a harpin-like protein to elicit the hypersensitive response (HR) in the non-host plant, tobacco. In this study, we cloned SsbXoc gene from X. oryzae pv. oryzicola (Xoc), the causal agent of bacterial leaf streak in rice, and transferred it into Nicotiana benthamiana via Agrobacterium-mediated transformation. The expression of SsbXoc in transgenic N. benthamiana enhanced growth of both seedling and adult plants. When inoculated with the harpin Hpa1 or the pathogen Pseudomonas syringae pv. tomato DC3000 (Pst DC3000), the accumulation of reactive oxygen species (ROS) was increased more in SsbXoc transgenic lines than that in wild-type (WT) plants. The expression of pathogenesis-related protein genes (PR1a and SGT1), HR marker genes (HIN1 and HSR203J) and the mitogen-activated protein kinase pathway gene, MPK3, was significantly higher in transgenic lines than in WT after inoculation with Pst DC3000. In addition, SsbXoc transgenic lines showed the enhanced resistance to the pathogenic bacteria P. s. tabaci and the improved tolerance to salt stress, accompanied by the elevated transcription levels of the defense- and stress-related genes. Taken together, these results indicate that overexpression of the SsbXoc gene in N. benthamiana significantly enhanced plant growth and increased tolerance to disease and salt stress via modulating the expression of the related genes, thus providing an alternative approach for development of plants with improved tolerance against biotic and abiotic stresses.
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Affiliation(s)
- Yanyan Cao
- School of Agriculture and Biology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Mingtao Yang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Wenxiu Ma
- School of Agriculture and Biology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Yujing Sun
- School of Agriculture and Biology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Gongyou Chen
- School of Agriculture and Biology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
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von Suesskind-Schwendi M, Boxhammer E, Hirt SW, Schreml S, Schmid C, Wollin L, Lehle K. The activity of nintedanib in an animal model of allogenic left lung transplantation resembling aspects of allograft rejection. Exp Lung Res 2017; 43:259-270. [PMID: 29035589 DOI: 10.1080/01902148.2017.1354408] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AIM OF THE STUDY The prevention and treatment of chronic lung allograft dysfunction (CLAD) after lung transplantation (LTx) remain unsatisfactory. Growth factors may play an important role in the development of CLAD. This study evaluated the effects of nintedanib, a receptor tyrosine kinase inhibitor, in the treatment of CLAD after experimental LTx. MATERIALS AND METHODS A rat model of left lung allo-transplantation (Fisher 344 to Wistar Kyoto) was used to evaluate the effect of nintedanib (50 mg/kg per day) on the development of CLAD. Therapy with nintedanib began 2 days before LTx and ended on postoperative day (POD) 20 (n = 6) or 60 (n = 6). Nontreated animals who underwent LTx (n = 12) were used as controls, whereas naïve lungs (n = 24) served as reference for physiological healthy organs without transplantation damage or medical effects. Acute and chronic rejection were evaluated on POD 20 and 60, respectively. RESULTS Immunohistologic analysis showed a decrease in growth factors/receptors on POD 60 (nintedanib-treated vs. nontreated controls: platelet-derived growth factor (PDGF) A: [P ≤ 0.001]; PDGF receptor-α: [P ≤ 0.001]; vascular endothelial growth factor (VEGF) A: [P ≤ 0.001]; VEGF receptor-2: [P ≤ 0.001]). However, no reductions in fibrotic changes were observed in nintedanib-treated allografts compared with nontreated allografts. Although nintedanib treatment started before LTx none of the animals showed impaired wound healing. No dehiscence of the sutures of the bronchus, vessels or skin, or stenosis of the bronchus was found. CONCLUSION In conclusion, while nintedanib reduced the expression of growth factors/receptors in a rat LTx model, a reduction in fibrotic alterations was not observed at POD 60.
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Affiliation(s)
| | - Elke Boxhammer
- a Department of Cardiothoracic Surgery , University Medical Center Regensburg , Regensburg , Germany
| | - Stephan W Hirt
- a Department of Cardiothoracic Surgery , University Medical Center Regensburg , Regensburg , Germany
| | - Stephan Schreml
- b Department of Dermatology , University Medical Center Regensburg , Regensburg , Germany
| | - Christof Schmid
- a Department of Cardiothoracic Surgery , University Medical Center Regensburg , Regensburg , Germany
| | - Lutz Wollin
- c Boehringer Ingelheim Pharma , Biberach , Germany
| | - Karla Lehle
- a Department of Cardiothoracic Surgery , University Medical Center Regensburg , Regensburg , Germany
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Beyond mouse cancer models: Three-dimensional human-relevant in vitro and non-mammalian in vivo models for photodynamic therapy. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2017; 773:242-262. [DOI: 10.1016/j.mrrev.2016.09.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 09/09/2016] [Indexed: 02/08/2023]
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Inoue K, Bando Y, Sakiyama K, Takizawa S, Sakashita H, Kondo H, Amano O. Development and regression of the thyroglossal duct in mice. Ann Anat 2015; 200:54-65. [DOI: 10.1016/j.aanat.2015.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 12/25/2014] [Accepted: 01/29/2015] [Indexed: 11/30/2022]
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12
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A half century of experimental neuroanatomical tracing. J Chem Neuroanat 2011; 42:157-83. [PMID: 21782932 DOI: 10.1016/j.jchemneu.2011.07.001] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 07/04/2011] [Accepted: 07/04/2011] [Indexed: 01/05/2023]
Abstract
Most of our current understanding of brain function and dysfunction has its firm base in what is so elegantly called the 'anatomical substrate', i.e. the anatomical, histological, and histochemical domains within the large knowledge envelope called 'neuroscience' that further includes physiological, pharmacological, neurochemical, behavioral, genetical and clinical domains. This review focuses mainly on the anatomical domain in neuroscience. To a large degree neuroanatomical tract-tracing methods have paved the way in this domain. Over the past few decades, a great number of neuroanatomical tracers have been added to the technical arsenal to fulfill almost any experimental demand. Despite this sophisticated arsenal, the decision which tracer is best suited for a given tracing experiment still represents a difficult choice. Although this review is obviously not intended to provide the last word in the tract-tracing field, we provide a survey of the available tracing methods including some of their roots. We further summarize our experience with neuroanatomical tracers, in an attempt to provide the novice user with some advice to help this person to select the most appropriate criteria to choose a tracer that best applies to a given experimental design.
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Thomas MA, Lemmer B. The use of heat-induced hydrolysis in immunohistochemistry on angiotensin II (AT1) receptors enhances the immunoreactivity in paraformaldehyde-fixed brain tissue of normotensive Sprague–Dawley rats. Brain Res 2006; 1119:150-64. [PMID: 17010318 DOI: 10.1016/j.brainres.2006.08.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Revised: 08/10/2006] [Accepted: 08/15/2006] [Indexed: 11/28/2022]
Abstract
The research on components of the renin-angiotensin system delivered a broad image of angiotensin II-binding sites. Especially, immunohistochemistry (IHC) provided an exact anatomical localization of the AT(1) receptor in the rat brain. Yet, controversial results between in vitro receptor autoradiography and IHC as well as between immunohistochemical studies using various antisera started a vehement discussion concerning specificity and cross-reactivity of these antisera. In particular the magnocellular subdivision of the paraventricular nucleus (PVN) and the supraoptic nucleus (SON) provided controversial results on the localization of AT(1) receptors. Both areas are known for angiotensin II-induced release of vasopressin (VP) and oxytocin (OXT). To evaluate the significance of the appropriate method of antigen retrieval and its relevance for the detection of AT(1) receptors we performed IHC on AT(1) receptors in paraformaldehyde-fixed and paraffin-embedded brain tissue of Sprague-Dawley rats using either the detergent Triton X-100 or microwave oven heating. This study demonstrates that heat-induced hydrolysis enhances the quality and quantity of immunoreactivity (IR) in IHC on AT(1) receptors. In the organum vasculosum lamina terminalis and in the parvocellular subdivisions of the PVN we report a distribution of AT(1)-like-IR similar to that observed with other methods. However, in addition, we provide evidence that distinct AT(1)-like-IR is also localized in few magnocellular neurons of the PVN and in few parvocellular neurons of the dorsal SON but not in magnocellular neurons of the SON. Moreover, parallel IHC indicates that few magnocellular OXT- or VP-releasing neurons of the PVN as well as parvocellular OXT-releasing neurons of the SON do also contain AT(1) receptors.
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Affiliation(s)
- Martin Alexander Thomas
- Institute of Pharmacology and Toxicology, Ruprecht-Karls University of Heidelberg, 68169 Mannheim, Germany.
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