1
|
Macdonald JK, Mehta AS, Drake RR, Angel PM. Molecular analysis of the extracellular microenvironment: from form to function. FEBS Lett 2024; 598:602-620. [PMID: 38509768 PMCID: PMC11049795 DOI: 10.1002/1873-3468.14852] [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: 11/29/2023] [Revised: 02/26/2024] [Accepted: 02/28/2024] [Indexed: 03/22/2024]
Abstract
The extracellular matrix (ECM) proteome represents an important component of the tissue microenvironment that controls chemical flux and induces cell signaling through encoded structure. The analysis of the ECM represents an analytical challenge through high levels of post-translational modifications, protease-resistant structures, and crosslinked, insoluble proteins. This review provides a comprehensive overview of the analytical challenges involved in addressing the complexities of spatially profiling the extracellular matrix proteome. A synopsis of the process of synthesizing the ECM structure, detailing inherent chemical complexity, is included to present the scope of the analytical challenge. Current chromatographic and spatial techniques addressing these challenges are detailed. Capabilities for multimodal multiplexing with cellular populations are discussed with a perspective on developing a holistic view of disease processes that includes both the cellular and extracellular microenvironment.
Collapse
Affiliation(s)
- Jade K Macdonald
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC
| | - Anand S Mehta
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC
| | - Richard R Drake
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC
| | - Peggi M. Angel
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC
| |
Collapse
|
2
|
Phase-specific signatures of wound fibroblasts and matrix patterns define cancer-associated fibroblast subtypes. Matrix Biol 2023; 119:19-56. [PMID: 36914141 DOI: 10.1016/j.matbio.2023.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/23/2023] [Accepted: 03/02/2023] [Indexed: 03/13/2023]
Abstract
Healing wounds and cancers present remarkable cellular and molecular parallels, but the specific roles of the healing phases are largely unknown. We developed a bioinformatics pipeline to identify genes and pathways that define distinct phases across the time-course of healing. Their comparison to cancer transcriptomes revealed that a resolution phase wound signature is associated with increased severity in skin cancer and enriches for extracellular matrix-related pathways. Comparisons of transcriptomes of early- and late-phase wound fibroblasts vs skin cancer-associated fibroblasts (CAFs) identified an "early wound" CAF subtype, which localizes to the inner tumor stroma and expresses collagen-related genes that are controlled by the RUNX2 transcription factor. A "late wound" CAF subtype localizes to the outer tumor stroma and expresses elastin-related genes. Matrix imaging of primary melanoma tissue microarrays validated these matrix signatures and identified collagen- vs elastin-rich niches within the tumor microenvironment, whose spatial organization predicts survival and recurrence. These results identify wound-regulated genes and matrix patterns with prognostic potential in skin cancer.
Collapse
|
3
|
Second-Harmonic Generation Imaging Reveals Changes in Breast Tumor Collagen Induced by Neoadjuvant Chemotherapy. Cancers (Basel) 2022; 14:cancers14040857. [PMID: 35205605 PMCID: PMC8869853 DOI: 10.3390/cancers14040857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 02/03/2022] [Indexed: 12/10/2022] Open
Abstract
Breast cancer is the most common invasive cancer in women, with most deaths attributed to metastases. Neoadjuvant chemotherapy (NACT) may be prescribed prior to surgical removal of the tumor for subsets of breast cancer patients but can have diverse undesired and off-target effects, including the increased appearance of the 'tumor microenvironment of metastasis', image-based multicellular signatures that are prognostic of breast tumor metastasis. To assess whether NACT can induce changes in two other image-based prognostic/predictive signatures derived from tumor collagen, we quantified second-harmonic generation (SHG) directionality and fiber alignment in formalin-fixed, paraffin-embedded sections of core needle biopsies and primary tumor excisions from 22 human epidermal growth factor receptor 2-overexpressing (HER2+) and 22 triple-negative breast cancers. In both subtypes, we found that SHG directionality (i.e., the forward-to-backward scattering ratio, or F/B) is increased by NACT in the bulk of the tumor, but not the adjacent tumor-stroma interface. Overall collagen fiber alignment is increased by NACT in triple-negative but not HER2+ breast tumors. These results suggest that NACT impacts the collagenous extracellular matrix in a complex and subtype-specific manner, with some prognostic features being unchanged while others are altered in a manner suggestive of a more metastatic phenotype.
Collapse
|
4
|
Laurito TL, França FT, Vieira-Damiani G, Pelegati VB, Baratti MO, de Carvalho HF, Cesar CL, de Moraes AM, Cintra ML, Teixeira F. The texture of collagen in the microenvironments of Merkel cell carcinoma. Medicine (Baltimore) 2021; 100:e27925. [PMID: 34964766 PMCID: PMC8615296 DOI: 10.1097/md.0000000000027925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 10/18/2021] [Accepted: 11/08/2021] [Indexed: 02/07/2023] Open
Abstract
ABSTRACT Solid tumors typically contain high levels of fibrillar collagen. The increased stromal collagen deposition usually promotes cancer progression since biochemical and biophysical cues from tumor-associated collagen fibers stimulate neoplastic cells. Few studies have investigated the relationship between Merkel cell carcinoma (MCC) and the extracellular matrix (ECM), but there are no works evaluating collagen.This is an observational, analytical, retrospective study including 11 patients with MCC. Primary tumor-stained sections were evaluated by second harmonic generation microscopy and texture analysis.Peritumoral texture features (area fraction, mean gray value, entropy, and contrast) showed much lower values than normal skin (P < .0001) revealing extensively altered structure of peritumoral collagen fibers. These differences were not significant between tumors with unfavorable and favorable known prognostic factors.Profound changes in collagen fibers present in the stroma accompanying primary MCC may contribute to the aggressive behavior of this tumor. Our results indicate that whatever MCC histological subtype, size or anatomical location, MCC promotes the same type of ECM for its development. As an outlook, therapies using ECM macromolecules or fibroblasts (the architects of ECM remodeling) as target could be useful in the treatment of MCC.
Collapse
Affiliation(s)
- Tiago Luders Laurito
- Department of Pathology, Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126. Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Flávia Thomé França
- Department of Pathology, Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126. Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Gislaine Vieira-Damiani
- Federal Institute of Education, Science and Technology of São Paulo, Avenida Ênio Pires de Camargo, 2971, Capivari, SP, Brazil
| | - Vitor Bianchin Pelegati
- National Institute of Photonics Applied to Cell Biology, Department of Quantum Electronics, Institute of Physics, State University of Campinas, Rua Sergio Buarque de Holanda, 777, SP, Brazil
| | - Mariana Ozello Baratti
- National Institute of Photonics Applied to Cell Biology, Department of Quantum Electronics, Institute of Physics, State University of Campinas, Rua Sergio Buarque de Holanda, 777, SP, Brazil
| | - Hernandez Faustino de Carvalho
- National Institute of Photonics Applied to Cell Biology, Department of Quantum Electronics, Institute of Physics, State University of Campinas, Rua Sergio Buarque de Holanda, 777, SP, Brazil
| | - Carlos Lenz Cesar
- National Institute of Photonics Applied to Cell Biology, Department of Quantum Electronics, Institute of Physics, State University of Campinas, Rua Sergio Buarque de Holanda, 777, SP, Brazil
| | - Aparecida Machado de Moraes
- Department of Dermatology, Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126. Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Maria Letícia Cintra
- Department of Pathology, Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126. Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Fernanda Teixeira
- Department of Pathology, Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126. Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| |
Collapse
|
5
|
Hristu R, Stanciu SG, Dumitru A, Paun B, Floroiu I, Costache M, Stanciu GA. Influence of hematoxylin and eosin staining on the quantitative analysis of second harmonic generation imaging of fixed tissue sections. BIOMEDICAL OPTICS EXPRESS 2021; 12:5829-5843. [PMID: 34692218 PMCID: PMC8515976 DOI: 10.1364/boe.428701] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/20/2021] [Accepted: 07/20/2021] [Indexed: 05/13/2023]
Abstract
Second harmonic generation (SHG) microscopy has emerged over the past two decades as a powerful tool for tissue characterization and diagnostics. Its main applications in medicine are related to mapping the collagen architecture of in-vivo, ex-vivo and fixed tissues based on endogenous contrast. In this work we present how H&E staining of excised and fixed tissues influences the extraction and use of image parameters specific to polarization-resolved SHG (PSHG) microscopy, which are known to provide quantitative information on the collagen structure and organization. We employ a theoretical collagen model for fitting the experimental PSHG datasets to obtain the second order susceptibility tensor elements ratios and the fitting efficiency. Furthermore, the second harmonic intensity acquired under circular polarization is investigated. The evolution of these parameters in both forward- and backward-collected SHG are computed for both H&E-stained and unstained tissue sections. Consistent modifications are observed between the two cases in terms of the fitting efficiency and the second harmonic intensity. This suggests that similar quantitative analysis workflows applied to PSHG images collected on stained and unstained tissues could yield different results, and hence affect the diagnostic accuracy.
Collapse
Affiliation(s)
- Radu Hristu
- Center for Microcopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Stefan G. Stanciu
- Center for Microcopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Adrian Dumitru
- Department of Pathology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Bogdan Paun
- Faculty of Automation and Computer Science, Technical University of Cluj-Napoca, 40002 Cluj-Napoca, Romania
| | - Iustin Floroiu
- Center for Microcopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Mariana Costache
- Department of Pathology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - George A. Stanciu
- Center for Microcopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 060042 Bucharest, Romania
| |
Collapse
|
6
|
Jiang W, Li M, Tan J, Feng M, Zheng J, Chen D, Liu Z, Yan B, Wang G, Xu S, Xiao W, Gao Y, Zhuo S, Yan J. A Nomogram Based on a Collagen Feature Support Vector Machine for Predicting the Treatment Response to Neoadjuvant Chemoradiotherapy in Rectal Cancer Patients. Ann Surg Oncol 2021; 28:6408-6421. [PMID: 34148136 DOI: 10.1245/s10434-021-10218-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 04/09/2021] [Indexed: 12/21/2022]
Abstract
BACKGROUND The relationship between collagen features (CFs) in the tumor microenvironment and the treatment response to neoadjuvant chemoradiotherapy (nCRT) is still unknown. This study aimed to develop and validate a perdition model based on the CFs and clinicopathological characteristics to predict the treatment response to nCRT among locally advanced rectal cancer (LARC) patients. METHODS In this multicenter, retrospective analysis, 428 patients were included and randomly divided into a training cohort (299 patients) and validation cohort (129 patients) [7:3 ratio]. A total of 11 CFs were extracted from a multiphoton image of pretreatment biopsy, and a support vector machine (SVM) was then used to construct a CFs-SVM classifier. A prediction model was developed and presented with a nomogram using multivariable analysis. Further validation of the nomogram was performed in the validation cohort. RESULTS The CFs-SVM classifier, which integrated collagen area, straightness, and crosslink density, was significantly associated with treatment response. Predictors contained in the nomogram included the CFs-SVM classifier and clinicopathological characteristics by multivariable analysis. The CFs nomogram demonstrated good discrimination, with area under the receiver operating characteristic curves (AUROCs) of 0.834 in the training cohort and 0.854 in the validation cohort. Decision curve analysis indicated that the CFs nomogram was clinically useful. Moreover, compared with the traditional clinicopathological model, the CFs nomogram showed more powerful discrimination in determining the response to nCRT. CONCLUSIONS The CFs-SVM classifier based on CFs in the tumor microenvironment is associated with treatment response, and the CFs nomogram integrating the CFs-SVM classifier and clinicopathological characteristics is useful for individualized prediction of the treatment response to nCRT among LARC patients.
Collapse
Affiliation(s)
- Wei Jiang
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China.,School of Science, Jimei University, Xiamen, Fujian, People's Republic of China
| | - Min Li
- Department of Radiation Oncology, Sun Yat sen University Cancer Center; State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, People's Republic of China
| | - Jie Tan
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Mingyuan Feng
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Jixiang Zheng
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Dexin Chen
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Zhangyuanzhu Liu
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Botao Yan
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Guangxing Wang
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, Fujian, People's Republic of China
| | - Shuoyu Xu
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China.,Department of Radiology, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, People's Republic of China
| | - Weiwei Xiao
- Department of Radiation Oncology, Sun Yat sen University Cancer Center; State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, People's Republic of China
| | - Yuanhong Gao
- Department of Radiation Oncology, Sun Yat sen University Cancer Center; State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, People's Republic of China.
| | - Shuangmu Zhuo
- School of Science, Jimei University, Xiamen, Fujian, People's Republic of China.
| | - Jun Yan
- Department of General Surgery, Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Nanfang Hospital, The First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China.
| |
Collapse
|
7
|
Perottoni S, Neto NGB, Di Nitto C, Dmitriev RI, Raimondi MT, Monaghan MG. Intracellular label-free detection of mesenchymal stem cell metabolism within a perivascular niche-on-a-chip. LAB ON A CHIP 2021; 21:1395-1408. [PMID: 33605282 DOI: 10.1039/d0lc01034k] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The stem cell niche at the perivascular space in human tissue plays a pivotal role in dictating the overall fate of stem cells within it. Mesenchymal stem cells (MSCs) in particular, experience influential microenvironmental conditions, which induce specific metabolic profiles that affect processes of cell differentiation and dysregulation of the immunomodulatory function. Reports focusing specifically on the metabolic status of MSCs under the effect of pathophysiological stimuli - in terms of flow velocities, shear stresses or oxygen tension - do not model heterogeneous gradients, highlighting the need for more advanced models reproducing the metabolic niche. Organ-on-a-chip technology offers the most advanced tools for stem cell niche modelling thus allowing for controlled dynamic culture conditions while profiling tuneable oxygen tension gradients. However, current systems for live cell detection of metabolic activity inside microfluidic devices require the integration of microsensors. The presence of such microsensors poses the potential to alter microfluidics and their resolution does not enable intracellular measurements but rather a global representation concerning cellular metabolism. Here, we present a metabolic toolbox coupling a miniaturised in vitro system for human-MSCs dynamic culture, which mimics microenvironmental conditions of the perivascular niche, with high-resolution imaging of cell metabolism. Using fluorescence lifetime imaging microscopy (FLIM) we monitor the spatial metabolic machinery and correlate it with experimentally validated intracellular oxygen concentration after designing the oxygen tension decay along the fluidic chamber by in silico models prediction. Our platform allows the metabolic regulation of MSCs, mimicking the physiological niche in space and time, and its real-time monitoring representing a functional tool for modelling perivascular niches, relevant diseases and metabolic-related uptake of pharmaceuticals.
Collapse
Affiliation(s)
- Simone Perottoni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci, 32 - 20133 Milan, Italy.
| | | | | | | | | | | |
Collapse
|
8
|
Borile G, Sandrin D, Filippi A, Anderson KI, Romanato F. Label-Free Multiphoton Microscopy: Much More Than Fancy Images. Int J Mol Sci 2021; 22:2657. [PMID: 33800802 PMCID: PMC7961783 DOI: 10.3390/ijms22052657] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/19/2021] [Accepted: 03/02/2021] [Indexed: 02/07/2023] Open
Abstract
Multiphoton microscopy has recently passed the milestone of its first 30 years of activity in biomedical research. The growing interest around this approach has led to a variety of applications from basic research to clinical practice. Moreover, this technique offers the advantage of label-free multiphoton imaging to analyze samples without staining processes and the need for a dedicated system. Here, we review the state of the art of label-free techniques; then, we focus on two-photon autofluorescence as well as second and third harmonic generation, describing physical and technical characteristics. We summarize some successful applications to a plethora of biomedical research fields and samples, underlying the versatility of this technique. A paragraph is dedicated to an overview of sample preparation, which is a crucial step in every microscopy experiment. Afterwards, we provide a detailed review analysis of the main quantitative methods to extract important information and parameters from acquired images using second harmonic generation. Lastly, we discuss advantages, limitations, and future perspectives in label-free multiphoton microscopy.
Collapse
Affiliation(s)
- Giulia Borile
- Laboratory of Optics and Bioimaging, Institute of Pediatric Research Città della Speranza, 35127 Padua, Italy;
- Department of Physics and Astronomy “G. Galilei”, University of Padua, 35131 Padua, Italy; (D.S.); (A.F.)
| | - Deborah Sandrin
- Department of Physics and Astronomy “G. Galilei”, University of Padua, 35131 Padua, Italy; (D.S.); (A.F.)
- L.I.F.E.L.A.B. Program, Consorzio per la Ricerca Sanitaria (CORIS), Veneto Region, 35128 Padua, Italy
| | - Andrea Filippi
- Department of Physics and Astronomy “G. Galilei”, University of Padua, 35131 Padua, Italy; (D.S.); (A.F.)
| | - Kurt I. Anderson
- Crick Advanced Light Microscopy Facility (CALM), The Francis Crick Institute, London NW1 1AT, UK;
| | - Filippo Romanato
- Laboratory of Optics and Bioimaging, Institute of Pediatric Research Città della Speranza, 35127 Padua, Italy;
- Department of Physics and Astronomy “G. Galilei”, University of Padua, 35131 Padua, Italy; (D.S.); (A.F.)
- L.I.F.E.L.A.B. Program, Consorzio per la Ricerca Sanitaria (CORIS), Veneto Region, 35128 Padua, Italy
| |
Collapse
|
9
|
Tsafas V, Gavgiotaki E, Tzardi M, Tsafa E, Fotakis C, Athanassakis I, Filippidis G. Polarization-dependent second-harmonic generation for collagen-based differentiation of breast cancer samples. JOURNAL OF BIOPHOTONICS 2020; 13:e202000180. [PMID: 32643819 DOI: 10.1002/jbio.202000180] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/29/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
Nonlinear optical imaging techniques have been widely used to reveal biological structures for accurate diagnosis at the cellular as well as the tissue level. In the present study, polarization-dependent second-harmonic generation (PSHG) was used to determine collagen orientation in breast cancer biopsy tissues (grades 0, I, II and III). The obtained data were processed using fast Fourier transform (FFT) analysis, while second-harmonic generation (SHG) anisotropy and the "ratio parameter" values were also calculated. Such measurements were shown to be able to distinguish collagen structure modifications in different cancer grades tested. The analysis presented herein suggests that PSHG imaging could provide a quantitative evaluation of the tumor state and the distinction of malignant from benign breast tissues. The obtained results also allowed the development of a biophysical model, which can explain the aforementioned differentiations and is in agreement with the simulations relating the SHG anisotropy values with the mechanical tension applied to the collagen during cancer progression. The current approach could be a step forward for the development of new, nondestructive, label free optical diagnostic tools for cancer reducing the need of recalls and unnecessary biopsies, while potentially improving cancer detection rates.
Collapse
Affiliation(s)
- Vassilis Tsafas
- Institute of Electronic Structure and Laser, Foundation for Research and Technology, Crete, Greece
- Department of Physics, University of Crete, Crete, Greece
| | - Evangelia Gavgiotaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology, Crete, Greece
- Medical School, University of Crete, Crete, Greece
| | - Maria Tzardi
- Medical School, University of Crete, Crete, Greece
| | - Effrosyni Tsafa
- Institute of Electronic Structure and Laser, Foundation for Research and Technology, Crete, Greece
| | - Costas Fotakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology, Crete, Greece
| | | | - George Filippidis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology, Crete, Greece
| |
Collapse
|
10
|
Biermann AC, Marzi J, Brauchle E, Wichmann JL, Arendt CT, Puntmann V, Nagel E, Abdelaziz S, Winter AG, Brockbank KGM, Layland S, Schenke-Layland K, Stock UA. Improved long-term durability of allogeneic heart valves in the orthotopic sheep model. Eur J Cardiothorac Surg 2020; 55:484-493. [PMID: 30165639 DOI: 10.1093/ejcts/ezy292] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 07/16/2018] [Accepted: 07/20/2018] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Frozen cryopreservation (FC) with the vapour phase of liquid nitrogen storage (-135°C) is a standard biobank technique to preserve allogeneic heart valves to enable a preferable allograft valve replacement in clinical settings. However, their long-term function is limited by immune responses, inflammation and structural degeneration. Ice-free cryopreserved (IFC) valves with warmer storage possibilities at -80°C showed better matrix preservation and decreased immunological response in preliminary short-term in vivo studies. Our study aimed to assess the prolonged performance of IFC allografts in an orthotopic pulmonary sheep model. METHODS FC (n = 6) and IFC (n = 6) allografts were transplanted into juvenile Merino sheep. After 12 months of implantation, functionality testing via 2-dimensional echocardiography and histological analyses was performed. In addition, multiphoton autofluorescence imaging and Raman microspectroscopy analysis were applied to qualitatively and quantitatively assess the matrix integrity of the leaflets. RESULTS Six animals from the FC group and 5 animals from the IFC group were included in the analysis. Histological explant analysis showed early inflammation in the FC valves, whereas sustainable, fully functional, devitalized acellular IFC grafts were obtained. IFC valves showed excellent haemodynamic data with fewer gradients, no pulmonary regurgitation, no calcification and acellularity. Structural remodelling of the leaflet matrix structure was only detected in FC-treated tissue, whereas IFC valves maintained matrix integrity comparable to that of native controls. The collagen crimp period and amplitude and elastin structure were significantly different in the FC valve cusps compared to IFC and native cusps. Collagen fibres in the FC valves were less aligned and straightened. CONCLUSIONS IFC heart valves with good haemodynamic function, reduced immunogenicity and preserved matrix structures have the potential to overcome the known limitations of the clinically applied FC valve.
Collapse
Affiliation(s)
- Anna Christina Biermann
- Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany.,Department of Cardiothoracic Surgery, Royal Brompton and Harefield Foundation Trust, Harefield, UK.,Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
| | - Julia Marzi
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
| | - Eva Brauchle
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
| | - Julian Lukas Wichmann
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Christophe Theo Arendt
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Valentina Puntmann
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Eike Nagel
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Sherif Abdelaziz
- Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Andreas Gerhard Winter
- Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Kelvin Gordon Mashader Brockbank
- Tissue Testing Technologies LLC, North Charleston, SC, USA.,Department of Bioengineering, Clemson University, North Charleston, SC, USA
| | - Shannon Layland
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
| | - Katja Schenke-Layland
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University Tuebingen, Tuebingen, Germany.,Department of Medicine/Cardiology, Cardiovascular Research Laboratories, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.,Natural and Medical Sciences Institute at the University of Tuebingen (NMI), Reutlingen, Germany
| | - Ulrich Alfred Stock
- Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany.,Department of Cardiothoracic Surgery, Royal Brompton and Harefield Foundation Trust, Harefield, UK.,Faculty of Medicine, Imperial College London, London, UK.,Magdi Yacoube Institute, Heart Science Center, Harefield, UK
| |
Collapse
|
11
|
Transcatheter Aortic Heart Valves. JACC Cardiovasc Imaging 2019; 12:135-145. [DOI: 10.1016/j.jcmg.2018.06.028] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/09/2018] [Accepted: 06/22/2018] [Indexed: 12/21/2022]
|
12
|
Fung KLB, Samim M, Gribble A, Barzda V, Vitkin IA. Monte Carlo simulation of polarization-sensitive second-harmonic generation and propagation in biological tissue. JOURNAL OF BIOPHOTONICS 2018; 11:e201800036. [PMID: 29971932 DOI: 10.1002/jbio.201800036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 07/01/2018] [Indexed: 06/08/2023]
Abstract
Polarization-sensitive second harmonic generation (p-SHG) is a nonlinear optical microscopy technique that has shown great promise in biomedicine, such as in detecting changes in the collagen ultrastructure of the tumor microenvironment. However, the complex nature of light-tissue interactions and the heterogeneity of biological samples pose challenges in creating an analytical and experimental quantification platform for tissue characterization via p-SHG. We present a Monte Carlo (MC) p-SHG simulation model based on double Stokes-Mueller polarimetry for the investigation of nonlinear light-tissue interaction. The MC model predictions are compared with experimental measurements of second-order nonlinear susceptibility component ratio and degree of polarization (DOP) in rat-tail collagen. The observed trends in the behavior of these parameters as a function of tissue thickness, as well as the overall extent of agreement between MC and experimental results, are discussed. High sensitivities of the susceptibility ratio and DOP are observed for the varying tissue thickness on the incoming fundamental light propagation pathway.
Collapse
Affiliation(s)
- K L Barry Fung
- Division of Engineering Science, University of Toronto, Toronto, Ontario, Canada
| | - Masood Samim
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Adam Gribble
- Department of Medical Biophysics, University of Toronto, Ontario, Canada
| | - Virginijus Barzda
- Department of Chemical and Physical Sciences, University of Toronto Mississauga, Mississauga, Ontario, Canada
- Department of Physics, University of Toronto, Toronto, Ontario, Canada
| | - I Alex Vitkin
- Division of Biophysics and Bioimaging, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Ontario, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|
13
|
Utino FL, Garcia M, Velho PENF, França AFEDC, Stelini RF, Pelegati VB, Cesar CL, de Souza EM, Cintra ML, Damiani GV. Second-harmonic generation imaging analysis can help distinguish sarcoidosis from tuberculoid leprosy. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-7. [PMID: 30516038 DOI: 10.1117/1.jbo.23.12.126001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
Sarcoidosis and tuberculoid leprosy (TL) are prototypes of granulomatous inflammation in dermatology, which embody one of the histopathology limitations in distinguishing some diseases. Recent advances in the use of nonlinear optical microscopy in skin have enabled techniques, such as second-harmonic generation (SHG), to become powerful tools to study the physical and biochemical properties of skin. We use SHG images to analyze the collagen network, to distinguish differences between sarcoidosis and TL granulomas. SHG images obtained from skin biopsies of 33 patients with TL and 24 with sarcoidosis retrospectively were analyzed using first-order statistics (FOS) and second-order statistics, such as gray-level co-occurrence matrix (GLCM). Among the four parameters evaluated (optical density, entropy, contrast, and second angular moment), only contrast demonstrated statistical significance, being higher in sarcoidosis (p = 0.02; 4908.31 versus 2822.17). The results may indicate insufficient differentiating power for most tested FOS and GLCM parameters in classifying sarcoidosis and TL granulomas, when used individually. But in combination with histopathology (H&E and complementary stains, such as silver and fast acid stains), SHG analysis, like contrast, can contribute to distinguishing between these diseases. This study can provide a way to evaluate collagen distribution in granulomatous diseases.
Collapse
Affiliation(s)
- Fabiane Leonel Utino
- University of Campinas, Department of Pathology, Campinas, Brazil
- University of Campinas, Department of Dermatology, Campinas, Brazil
| | - Marina Garcia
- University of Campinas, Department of Pathology, Campinas, Brazil
| | | | | | | | - Vitor Bianchin Pelegati
- Technology on Photonics Applied to Cell Biology, Campinas, Brazil
- University of Campinas, "Gleb Wataghin" Institute of Physics, Campinas, Brazil
| | - Carlos Lenz Cesar
- Technology on Photonics Applied to Cell Biology, Campinas, Brazil
- University of Campinas, "Gleb Wataghin" Institute of Physics, Campinas, Brazil
- Federal University of Ceará, Department of Physics, Fortaleza, Brazil
| | | | | | - Gislaine Vieira Damiani
- Technology on Photonics Applied to Cell Biology, Campinas, Brazil
- Federal Institute of Education, Science and Technology, São Paulo, Brazil
| |
Collapse
|
14
|
Arthur A, Nguyen TM, Paton S, Klisuric A, Zannettino ACW, Gronthos S. The osteoprogenitor-specific loss of ephrinB1 results in an osteoporotic phenotype affecting the balance between bone formation and resorption. Sci Rep 2018; 8:12756. [PMID: 30143786 PMCID: PMC6109077 DOI: 10.1038/s41598-018-31190-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 08/14/2018] [Indexed: 01/08/2023] Open
Abstract
The present study investigated the effects of conditional deletion of ephrinB1 in osteoprogenitor cells driven by the Osterix (Osx) promoter, on skeletal integrity in a murine model of ovariectomy-induced (OVX) osteoporosis. Histomorphometric and μCT analyses revealed that loss of ephrinB1 in sham Osx:cre-ephrinB1fl/fl mice caused a reduction in trabecular bone comparable to OVX Osx:Cre mice, which was associated with a significant reduction in bone formation rates and decrease in osteoblast numbers. Interestingly, these observations were not exacerbated in OVX Osx:cre-ephrinB1fl/fl mice. Furthermore, sham Osx:cre-ephrinB1fl/fl mice displayed significantly higher osteoclast numbers and circulating degraded collagen type 1 compared to OVX Osx:Cre mice. Confirmation studies found that cultured monocytes expressing EphB2 formed fewer TRAP+ multinucleated osteoclasts and exhibited lower resorption activity in the presence of soluble ephrinB1-Fc compared to IgG control. This inhibition of osteoclast formation and function induced by ephrinB1-Fc was reversed in the presence of an EphB2 chemical inhibitor. Collectively, these observations suggest that ephrinB1, expressed by osteoprogenitors, influences bone loss during the development of osteoporosis, by regulating both osteoblast and osteoclast formation and function, leading to a loss of skeletal integrity.
Collapse
Affiliation(s)
- Agnieszka Arthur
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, 5005, SA, Australia.,South Australian Health and Medical Research Institute, Adelaide, 5000, SA, Australia
| | - Thao M Nguyen
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, 5005, SA, Australia.,South Australian Health and Medical Research Institute, Adelaide, 5000, SA, Australia
| | - Sharon Paton
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, 5005, SA, Australia.,South Australian Health and Medical Research Institute, Adelaide, 5000, SA, Australia.,Myeloma Research Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, 5005, SA, Australia
| | - Ana Klisuric
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, 5005, SA, Australia
| | - Andrew C W Zannettino
- South Australian Health and Medical Research Institute, Adelaide, 5000, SA, Australia.,Myeloma Research Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, 5005, SA, Australia
| | - Stan Gronthos
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, 5005, SA, Australia. .,South Australian Health and Medical Research Institute, Adelaide, 5000, SA, Australia.
| |
Collapse
|
15
|
Biermann AC, Marzi J, Brauchle E, Schneider M, Kornberger A, Abdelaziz S, Wichmann JL, Arendt CT, Nagel E, Brockbank KGM, Seifert M, Schenke-Layland K, Stock UA. Impact of T-cell-mediated immune response on xenogeneic heart valve transplantation: short-term success and mid-term failure. Eur J Cardiothorac Surg 2018; 53:784-792. [PMID: 29186380 DOI: 10.1093/ejcts/ezx396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 10/23/2017] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Allogeneic frozen cryopreserved heart valves (allografts or homografts) are commonly used in clinical practice. A major obstacle for their application is the limited availability in particular for paediatrics. Allogeneic large animal studies revealed that alternative ice-free cryopreservation (IFC) results in better matrix preservation and reduced immunogenicity. The objective of this study was to evaluate xenogeneic (porcine) compared with allogeneic (ovine) IFC heart valves in a large animal study. METHODS IFC xenografts and allografts were transplanted in 12 juvenile merino sheep for 1-12 weeks. Immunohistochemistry, ex vivo computed tomography scans and transforming growth factor-β release profiles were analysed to evaluate postimplantation immunopathology. In addition, near-infrared multiphoton imaging and Raman spectroscopy were employed to evaluate matrix integrity of the leaflets. RESULTS Acellular leaflets were observed in both groups 1 week after implantation. Allogeneic leaflets remained acellular throughout the entire study. In contrast, xenogeneic valves were infiltrated with abundant T-cells and severely thickened over time. No collagen or elastin changes could be detected in either group using multiphoton imaging. Raman spectroscopy with principal component analysis focusing on matrix-specific peaks confirmed no significant differences for explanted allografts. However, xenografts demonstrated clear matrix changes, enabling detection of distinct inflammatory-driven changes but without variations in the level of transforming growth factor-β. CONCLUSIONS Despite short-term success, mid-term failure of xenogeneic IFC grafts due to a T-cell-mediated extracellular matrix-triggered immune response was shown.
Collapse
Affiliation(s)
- Anna C Biermann
- Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany.,Department of Cardiothoracic Surgery, Royal Brompton and Harefield Foundation Trust, Harefield, UK.,Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University, Tuebingen, Germany
| | - Julia Marzi
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University, Tuebingen, Germany.,Department of Cell and Tissue Engineering, Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB), Stuttgart, Germany
| | - Eva Brauchle
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University, Tuebingen, Germany.,Department of Cell and Tissue Engineering, Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB), Stuttgart, Germany
| | - Maria Schneider
- Institue of Medical Immunology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany.,Berlin-Brandenburg Center of Regenerative Therapies (BCRT), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Angela Kornberger
- Department of Cardiothoracic and Vascular Surgery, Johannes Gutenberg-University, Mainz, Germany
| | - Sherif Abdelaziz
- Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Julian L Wichmann
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Christophe T Arendt
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Eike Nagel
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
| | - Kelvin G M Brockbank
- Tissue Testing Technologies LLC, North Charleston, SC, USA.,Department of Bioengineering, Clemson University, North Charleston, SC, USA
| | - Martina Seifert
- Institue of Medical Immunology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany.,Berlin-Brandenburg Center of Regenerative Therapies (BCRT), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Katja Schenke-Layland
- Department of Women's Health, Research Institute for Women's Health, Eberhard-Karls-University, Tuebingen, Germany.,Department of Cell and Tissue Engineering, Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB), Stuttgart, Germany.,Department of Medicine / Cardiology, Cardiovascular Research Laboratories, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Ulrich A Stock
- Department of Thoracic and Cardiovascular Surgery, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany.,Department of Cardiothoracic Surgery, Royal Brompton and Harefield Foundation Trust, Harefield, UK.,Faculty of Medicine, Imperial College London, London, UK.,Magdi Yacoub Institute, Heart Science Centre, Harefield, UK
| |
Collapse
|
16
|
Shen N, Riedl JA, Carvajal Berrio DA, Davis Z, Monaghan MG, Layland SL, Hinderer S, Schenke-Layland K. A flow bioreactor system compatible with real-time two-photon fluorescence lifetime imaging microscopy. ACTA ACUST UNITED AC 2018; 13:024101. [PMID: 29148433 DOI: 10.1088/1748-605x/aa9b3c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Bioreactors are essential cell and tissue culture tools that allow the introduction of biophysical signals into in vitro cultures. One major limitation is the need to interrupt experiments and sacrifice samples at certain time points for analyses. To address this issue, we designed a bioreactor that combines high-resolution contact-free imaging and continuous flow in a closed system that is compatible with various types of microscopes. The high throughput fluid flow bioreactor was combined with two-photon fluorescence lifetime imaging microscopy (2P-FLIM) and validated. The hydrodynamics of the bioreactor chamber were characterized using COMSOL. The simulation of shear stress indicated that the bioreactor system provides homogeneous and reproducible flow conditions. The designed bioreactor was used to investigate the effects of low shear stress on human umbilical vein endothelial cells (HUVECs). In a scratch assay, we observed decreased migration of HUVECs under shear stress conditions. Furthermore, metabolic activity shifts from glycolysis to oxidative phosphorylation-dependent mechanisms in HUVECs cultured under low shear stress conditions were detected using 2P-FLIM. Future applications for this bioreactor range from observing cell fate development in real-time to monitoring the environmental effects on cells or metabolic changes due to drug applications.
Collapse
Affiliation(s)
- Nian Shen
- Department of Women's Health, Research Institute of Women's Health, University Hospital of the Eberhard Karls University, Tübingen, Germany. Department of Cell and Tissue Engineering, Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Stuttgart, Germany
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Sun J, Ren DD, Wan JY, Chen C, Chen D, Yang H, Feng CL, Gao J. Desensitizing Mitochondrial Permeability Transition by ERK-Cyclophilin D Axis Contributes to the Neuroprotective Effect of Gallic Acid against Cerebral Ischemia/Reperfusion Injury. Front Pharmacol 2017; 8:184. [PMID: 28428752 PMCID: PMC5382198 DOI: 10.3389/fphar.2017.00184] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/22/2017] [Indexed: 12/14/2022] Open
Abstract
Ischemic stroke is a devastating disease with complex pathophysiology. Much evidence confirms that opening of the mitochondrial permeability transition pore (MPTP) is related with mitochondrial dysfunction to apoptosis in ischemic stroke, thus elucidating its signaling mechanism and screening novel MPTP inhibitor is therefore of paramount importance. Our earlier studies identified that gallic acid (GA), a naturally occurring plant phenol, endows with effect on inhibition of mitochondrial dysfunction, which has significant neuroprotective effect in cerebral ischemia/reperfusion injury. However, its molecular mechanisms regulating mitochondrial dysfunction remain elusive. Here, we uncover a role of GA in protecting mitochondria via MPTP inhibition. In addition to inhibit CypD binding to adenine nucleotide translocator, GA potentiates extracellular signal-regulated kinases (ERK) phosphorylation, leading to a decrease in cyclophilin D (CypD) expression, resulting in a desensitization to induction of MPTP, thus inhibiting caspase activation and ultimately giving rise to cellular survival. Our study firstly identifies ERK-CypD axis is one of the cornerstones of the cell death pathways following ischemic stroke, and confirms GA is a novel inhibitor of MPTP, which inhibits apoptosis depending on regulating the ERK-CypD axis.
Collapse
Affiliation(s)
- Jing Sun
- Neurobiology and Mitochondrial Key Laboratory, School of Pharmacy, Jiangsu UniversityZhenjiang, China.,Department of Traditional Chinese Medicine, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| | - Da-Dui Ren
- Neurobiology and Mitochondrial Key Laboratory, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| | - Jin-Yi Wan
- Department of Traditional Chinese Medicine, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| | - Chen Chen
- Neurobiology and Mitochondrial Key Laboratory, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| | - Dong Chen
- Neurobiology and Mitochondrial Key Laboratory, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| | - Huan Yang
- Department of Traditional Chinese Medicine, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| | - Chun-Lai Feng
- Department of Pharmaceutics, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| | - Jing Gao
- Neurobiology and Mitochondrial Key Laboratory, School of Pharmacy, Jiangsu UniversityZhenjiang, China
| |
Collapse
|