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Wang S, Pan J, Zhang X, Li Y, Liu W, Lin R, Wang X, Kang D, Li Z, Huang F, Chen L, Chen J. Towards next-generation diagnostic pathology: AI-empowered label-free multiphoton microscopy. LIGHT, SCIENCE & APPLICATIONS 2024; 13:254. [PMID: 39277586 PMCID: PMC11401902 DOI: 10.1038/s41377-024-01597-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 08/04/2024] [Accepted: 08/21/2024] [Indexed: 09/17/2024]
Abstract
Diagnostic pathology, historically dependent on visual scrutiny by experts, is essential for disease detection. Advances in digital pathology and developments in computer vision technology have led to the application of artificial intelligence (AI) in this field. Despite these advancements, the variability in pathologists' subjective interpretations of diagnostic criteria can lead to inconsistent outcomes. To meet the need for precision in cancer therapies, there is an increasing demand for accurate pathological diagnoses. Consequently, traditional diagnostic pathology is evolving towards "next-generation diagnostic pathology", prioritizing on the development of a multi-dimensional, intelligent diagnostic approach. Using nonlinear optical effects arising from the interaction of light with biological tissues, multiphoton microscopy (MPM) enables high-resolution label-free imaging of multiple intrinsic components across various human pathological tissues. AI-empowered MPM further improves the accuracy and efficiency of diagnosis, holding promise for providing auxiliary pathology diagnostic methods based on multiphoton diagnostic criteria. In this review, we systematically outline the applications of MPM in pathological diagnosis across various human diseases, and summarize common multiphoton diagnostic features. Moreover, we examine the significant role of AI in enhancing multiphoton pathological diagnosis, including aspects such as image preprocessing, refined differential diagnosis, and the prognostication of outcomes. We also discuss the challenges and perspectives faced by the integration of MPM and AI, encompassing equipment, datasets, analytical models, and integration into the existing clinical pathways. Finally, the review explores the synergy between AI and label-free MPM to forge novel diagnostic frameworks, aiming to accelerate the adoption and implementation of intelligent multiphoton pathology systems in clinical settings.
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Affiliation(s)
- Shu Wang
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, 350007, China
| | - Junlin Pan
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
| | - Xiao Zhang
- College of Computer and Data Science, Fuzhou University, Fuzhou, 350108, China
| | - Yueying Li
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
| | - Wenxi Liu
- College of Computer and Data Science, Fuzhou University, Fuzhou, 350108, China
| | - Ruolan Lin
- Department of Radiology, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Xingfu Wang
- Department of Pathology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
| | - Deyong Kang
- Department of Pathology, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Zhijun Li
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, 350007, China
| | - Feng Huang
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China.
| | - Liangyi Chen
- New Cornerstone Laboratory, State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, National Biomedical Imaging Center, School of Future Technology, Peking University, Beijing, 100091, China.
| | - Jianxin Chen
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, 350007, China.
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2
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Stratigaki M. Autofluorescence for the Visualization of Microorganisms in Biodeteriorated Materials in the Context of Cultural Heritage. Chempluschem 2024:e202400170. [PMID: 39222337 DOI: 10.1002/cplu.202400170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 07/04/2024] [Indexed: 09/04/2024]
Abstract
Microorganisms, including fungi, bacteria, cyanobacteria, and algae, frequently colonize the surfaces of cultural heritage materials. These biological agents can cause biodeterioration through various mechanisms, resulting in aesthetic alteration, physical disruption, or compromise of mechanical integrity. To assess the presence and diversity of microorganisms, a combination of microscopy techniques is commonly used in conjunction with results from both culture-dependent and culture-independent methods. However, microbial populations are often underestimated. To address this issue, microorganisms can be detected by their intrinsic fluorescence, which can be observed via fluorescence microscopy. This approach facilitates the mapping of the spatial arrangement of microorganisms and the understanding of colonization patterns, thereby complementing established imaging techniques and providing insight into the interactions of microbial communities with the substrate. Given the limited research in this area, we examine the potential of microorganism autofluorescence as a molecular tool for investigating biodeterioration in artistic and architectural heritage, with a particular focus on paper and stone materials. Identifying and understanding the diverse microbiota that may be present is crucial for developing tailored and effective preventive measures and conservation treatments, as some of the species discovered may pose significant risks to both artifacts and human health.
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Ma C, Zhu Y, Zhang Z, Chen X, Ji Z, Zhang LN, Xu Q. Ratiometric electrochemiluminescence sensing and intracellular imaging of ClO - via resonance energy transfer. Anal Bioanal Chem 2024; 416:4691-4703. [PMID: 38512384 DOI: 10.1007/s00216-024-05236-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 02/24/2024] [Accepted: 02/27/2024] [Indexed: 03/23/2024]
Abstract
Electrochemiluminescence resonance energy transfer (ECL-RET) is a versatile signal transduction strategy widely used in the fabrication of chem/biosensors. However, this technique has not yet been applied in visualized imaging analysis of intracellular species due to the insulating nature of the cell membrane. Here, we construct a ratiometric ECL-RET analytical method for hypochlorite ions (ClO-) by ECL luminophore, with a luminol derivative (L-012) as the donor and a fluorescence probe (fluorescein hydrazide) as the acceptor. L-012 can emit a strong blue ECL signal and fluorescein hydrazide has negligible absorbance and fluorescence signal in the absence of ClO-. Thus, the ECL-RET process is turned off at this time. In the presence of ClO-, however, the closed-loop hydrazide structure in fluorescein hydrazide is opened via specific recognition with ClO-, accompanied with intensified absorbance and fluorescence signal. Thanks to the spectral overlap between the ECL spectrum of L-012 and the absorption spectrum of fluorescein, the ECL-RET effect is gradually recovered with the addition of ClO-. Furthermore, the ECL-RET system has been successfully applied to image intracellular ClO-. Although the insulating nature of the cell itself can generate a shadow ECL pattern in the cellular region, extracellular ECL emission penetrates the cell membrane and excites intracellular fluorescein generated by the reactions between fluorescein hydrazide and ClO-. The cell imaging strategy via ECL-RET circumvents the blocking of the cell membrane and enables assays of intracellular species. The importance of the ECL-RET platform lies in calibrating the fluctuation from the external environment and improving the selectivity by using fluorescent probes. Therefore, this ratiometric ECL sensor has shown broad application prospects in the identification of targets in clinical diagnosis and environmental monitoring.
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Affiliation(s)
- Cheng Ma
- School of Chemistry and Chemical Engineering, Yangzhou University, YangzhouJiangsu, 225002, China.
| | - Yujing Zhu
- School of Chemistry and Chemical Engineering, Yangzhou University, YangzhouJiangsu, 225002, China
| | - Zhichen Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, YangzhouJiangsu, 225002, China
| | - Xuan Chen
- School of Chemistry and Chemical Engineering, Yangzhou University, YangzhouJiangsu, 225002, China
| | - Zhengping Ji
- School of Chemistry and Chemical Engineering, Yangzhou University, YangzhouJiangsu, 225002, China
| | - Lu-Nan Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, YangzhouJiangsu, 225002, China
| | - Qin Xu
- School of Chemistry and Chemical Engineering, Yangzhou University, YangzhouJiangsu, 225002, China.
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4
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Manohar SM. Shedding Light on Intracellular Proteins using Flow Cytometry. Cell Biochem Biophys 2024; 82:1693-1707. [PMID: 38831173 DOI: 10.1007/s12013-024-01338-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2024] [Indexed: 06/05/2024]
Abstract
Intracellular protein abundance is routinely measured in mammalian cells using population-based techniques such as western blotting which fail to capture single cell protein levels or using fluorescence microscopy which is although suitable for single cell protein detection but not for rapid analysis of large no. of cells. Flow cytometry offers rapid, high-throughput, multiparameter-based analysis of intracellular protein expression in statistically significant no. of cells at single cell resolution. In past few decades, customized assays have been developed for flow cytometric detection of specific intracellular proteins. This review discusses the scope of flow cytometry for intracellular protein detection in mammalian cells along with specific applications. Technological advancements to overcome the limitations of traditional flow cytometry for the same are also discussed.
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Affiliation(s)
- Sonal M Manohar
- Department of Biological Sciences, Sunandan Divatia School of Science, SVKM's NMIMS (Deemed-to-be) University, Vile Parle (West), Mumbai, 400056, India.
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5
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Chernii S, Selin R, Bila G, Bilyy R, Körber M, Mokhir A. Red Fluorescent Aminoferrocene (Pro)Drugs for in Cellulo and in Vivo Imaging. Chemistry 2024; 30:e202401107. [PMID: 38923064 DOI: 10.1002/chem.202401107] [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: 03/19/2024] [Revised: 06/24/2024] [Accepted: 06/24/2024] [Indexed: 06/28/2024]
Abstract
Red fluorescent dyes are usually charged, lipophilic molecules with relatively high molecular weight, which tend to localize in specific intracellular locations, e. g., a cyanine dye Cy5 is biased towards mitochondria. They are often used as markers of biomolecules including nucleic acids and proteins. Since the molecular weight of the dyes is much smaller than that of the biomolecules, the labelling has a negligible effect on the properties of the biomolecules. In contrast, conjugation of the dyes to low molecular weight (pro)drugs can dramatically alter their properties. For example, conjugates of Cy5 with lysosome-targeting aminoferrocenes accumulate in mitochondria and exhibit no intracellular effects characteristic for the parent (pro)drugs. Herein we tested several neutral and negatively charged dyes for labelling lysosome-targeting aminoferrocenes 7 and 8 as well as a non-targeted control 3. We found that a BODIPY derivative BDP-TR exhibits the desired unbiased properties: the conjugation does not disturb the intracellular localization of the (pro)drugs, their mode of action, and cancer cell specificity. We used the conjugates to clarify the mechanism of action of the aminoferrocenes. In particular, we identified new intermediates, explained why lysosome-targeting aminoferrocenes are more potent than their non-targeted counterparts, and evaluated their distribution in vivo.
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Affiliation(s)
- Svitlana Chernii
- Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair Organic Chemistry II, Nikolaus-Fiebiger str. 10, 91058, Erlangen, Germany
- Innovation Development Center ABN LLC, Pirogov str. 2/37, 01030, Kyiv, Ukraine
| | - Roman Selin
- Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair Organic Chemistry II, Nikolaus-Fiebiger str. 10, 91058, Erlangen, Germany
- Institute of General and Inorganic Chemistry NASU, 32/34 Palladin Ave., 03142, Kyiv, Ukraine
| | - Galyna Bila
- Lectinotest R&D, Mechanichna str. 2, 79024, Lviv, Ukraine
- Danylo Halytsky Lviv National Medical University, Department of Histology, Cytology and Embryology, Pekarska str. 68, 79010, Lviv, Ukraine
| | - Rostyslav Bilyy
- Lectinotest R&D, Mechanichna str. 2, 79024, Lviv, Ukraine
- Danylo Halytsky Lviv National Medical University, Department of Histology, Cytology and Embryology, Pekarska str. 68, 79010, Lviv, Ukraine
| | - Marlies Körber
- Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair Organic Chemistry II, Nikolaus-Fiebiger str. 10, 91058, Erlangen, Germany
| | - Andriy Mokhir
- Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, Department of Chemistry and Pharmacy, Chair Organic Chemistry II, Nikolaus-Fiebiger str. 10, 91058, Erlangen, Germany
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6
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Vidal-Flores LM, Reyes-Alberto M, Albor-Ramírez E, Domínguez-Velasco CF, Gutierrez-Herrera E, Padilla-Castañeda MA. Fabrication and Characterization of Brain Tissue Phantoms Using Agarose Gels for Ultraviolet Vision Systems. Gels 2024; 10:540. [PMID: 39195069 DOI: 10.3390/gels10080540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Revised: 08/17/2024] [Accepted: 08/17/2024] [Indexed: 08/29/2024] Open
Abstract
Recreating cerebral tissue using a tissue-mimicking phantom is valuable because it provides a tool for studying physiological and biological processes related to tissues without the necessity of performing the study directly in the tissue or even in a patient. The reproduction of the optical properties allows investigation in areas such as imaging, optics, and ultrasound, among others. This paper presents a methodology for manufacturing agarose-based phantoms that mimic the optical characteristics of brain tissue using scattering and absorbing agents and proposes combinations of these agents to recreate the healthy brain tissue optical coefficients within the wavelength range of 350 to 500 nm. The results of the characterization of the manufactured phantoms propose ideal combinations of the used materials for their use in controlled environment experiments in the UV range, following a cost-effective methodology.
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Affiliation(s)
- Luis M Vidal-Flores
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | - Miguel Reyes-Alberto
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | - Efraín Albor-Ramírez
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | - César F Domínguez-Velasco
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
| | | | - Miguel A Padilla-Castañeda
- Applied Sciences and Technology Institute ICAT, National Autonomous University of Mexico UNAM, Ciudad Universitaria, Mexico City 04510, Mexico
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Dumitrescu OM, Zemba M, Brănișteanu DC, Pîrvulescu RA, Radu M, Stanca HT. Fundus Autofluorescence in Diabetic Retinopathy. J Pers Med 2024; 14:793. [PMID: 39201985 PMCID: PMC11355256 DOI: 10.3390/jpm14080793] [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: 06/23/2024] [Revised: 07/18/2024] [Accepted: 07/24/2024] [Indexed: 09/03/2024] Open
Abstract
Diabetic retinopathy is a leading cause of visual morbidity worldwide. Fundus autofluorescence is a rapid, non-invasive imaging modality that has gained increased popularity in recent years in the multimodal evaluation of diabetic retinopathy and, in particular, of diabetic macular oedema. Acquired using either a fundus camera or the confocal scanning laser ophthalmoscope, short-wavelength and near-infrared autofluorescence are the most used techniques in diabetic retinopathy. In diabetic macular oedema, short-wavelength autofluorescence, in its cystoid pattern, is useful for detecting cystoid macular oedema. Increased spot hyperautofluorescence in short-wavelength and granular changes in near-infrared autofluorescence correlate well with other imaging findings, indicating photoreceptor and retinal pigment epithelium damage and being associated with decreased visual acuity. While also being a marker of oxidative stress, increased short-wavelength autofluorescence in the setting of diabetic macular oedema appears to be a prognostic factor for poor visual outcome, even after the resolution of the intraretinal fluid. Autofluorescence also helps in the assessment of diabetic retinal pigment epitheliopathy and choroidopathy. Fundus autofluorescence is an evolving technology that will assist in gaining further insight into the pathophysiology of diabetic retinopathy and allow for a more comprehensive evaluation of these patients.
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Affiliation(s)
- Otilia-Maria Dumitrescu
- Department of Ophthalmology, “Dr. Carol Davila” Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Mihail Zemba
- Department of Ophthalmology, “Dr. Carol Davila” Central Military Emergency University Hospital, 010825 Bucharest, Romania
- Department of Ophthalmology, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania
| | | | - Ruxandra Angela Pîrvulescu
- Department of Ophthalmology, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania
| | - Madalina Radu
- Department of Ophthalmology, “Dr. Carol Davila” Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Horia Tudor Stanca
- Department of Ophthalmology, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania
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8
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Kuchimaru T. Emerging Synthetic Bioluminescent Reactions for Non-Invasive Imaging of Freely Moving Animals. Int J Mol Sci 2024; 25:7338. [PMID: 39000448 PMCID: PMC11242611 DOI: 10.3390/ijms25137338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 07/02/2024] [Accepted: 07/03/2024] [Indexed: 07/16/2024] Open
Abstract
Bioluminescence imaging (BLI) is an indispensable technique for visualizing the dynamics of diverse biological processes in mammalian animal models, including cancer, viral infections, and immune responses. However, a critical scientific challenge remains: non-invasively visualizing homeostatic and disease mechanisms in freely moving animals to understand the molecular basis of exercises, social behavior, and other phenomena. Classical BLI relies on prolonged camera exposure to accumulate the limited number of photons that traveled from deep tissues in anesthetized or constrained animals. Recent advancements in synthetic bioluminescence reactions, utilizing artificial luciferin-luciferase pairs, have considerably increased the number of detectable photons from deep tissues, facilitating high-speed BLI to capture moving objects. In this review, I provide an overview of emerging synthetic bioluminescence reactions that enable the non-invasive imaging of freely moving animals. This approach holds the potential to uncover unique physiological processes that are inaccessible with current methodologies.
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Affiliation(s)
- Takahiro Kuchimaru
- Center for Molecular Medicine, Jichi Medical University, Tochigi 329-0498, Japan
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Han D, Yang M, Feng Z, Wu Y, Sojic N, Jiang D. Thickness-Resolved Electrochemiluminescence Microscopy of Extracellular Matrix at Tumor Tissues for Rapid Cancer Diagnosis. ACS APPLIED MATERIALS & INTERFACES 2024; 16:32078-32086. [PMID: 38865735 DOI: 10.1021/acsami.4c05735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
The traditional recognition of extracellular matrix (ECM) at tissue sections relies on the time-consuming immunofluorescence that could not meet the demand of rapid diagnosis. Herein, we introduce a thickness-resolved electrochemiluminescence (ECL) microscopy to image thin-layer ECM at tissue sections for fast histopathological analysis. The unique surface-confined ECL mechanism enables to unveil the diversity and complexity of multiple tissue structures with varying thicknesses. Notably, the short lifetimes and the limited diffusion of electrogenerated coreactant radicals combined with their chemical reactivity result in a 2-fold increase in ECL intensity on ECM structures compared to the remaining tissue, enabling ECM visualization without specific labeling. The further quantitation of the ECM localization within tissue sections furnishes crucial insights into tumor progression and, more importantly, differentiates carcinoma and paracancerous tissues from patients in less than 30 min. Moreover, the reported electrochemistry-based microscopy is a dynamic approach allowing to investigate the transport, tortuosity, and trafficking properties through the tissues. This thickness-resolved recognition strategy not only opens new avenues for imaging complex samples but also holds promise for expediting tissue pathologic diagnosis, offering a more automated protocol with enhanced quantitative data compared to current intraoperative pathology methods.
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Affiliation(s)
- Dongni Han
- State Key Laboratory of Analytical Chemistry for Life Science and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Mi Yang
- The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School and Clinical Cancer Institute of Nanjing University, Nanjing 210008, China
| | - Zengyu Feng
- Department of General Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Yulian Wu
- Department of General Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Neso Sojic
- Institute des Sciences Moléculaires, UMR 5255, 16 avenue Pey-Berland, University of Bordeaux, Pessac 33607, France
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life Science and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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10
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Maslanka R, Przywara M, Janeczko A, Zadrag-Tecza R. Microbial cell autofluorescence as a method for measuring the intracellular content of B2 and B6 vitamins. INT J VITAM NUTR RES 2024; 94:334-341. [PMID: 37859397 DOI: 10.1024/0300-9831/a000796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Vitamins are important organic compound required for the proper functioning of cells and organisms. Vitamins of special industrial and pharmaceutical interests include riboflavin (vitamin B2) and pyridoxine (vitamin B6). Commercial production of those biological compounds has increasingly relied on microorganisms and requires simple methods for detecting and estimating their level of synthesis during the biotechnological process. In the case of yeast, methods based on autofluorescence, i.e. natural fluorescence emitted by several cellular compounds, including vitamins, may be useful. Considering that the intensity of emitted light is proportional to the intracellular concentration of riboflavin and pyridoxine, autofluorescence may be a convenient method for their quantification. In this report, we demonstrate a simple, rapid, and sufficiently trustworthy spectrofluorimetric method for determining the content of vitamins B2 and B6 in yeast cells which consists of cells growing, harvesting, washing, and resuspending in a buffer, and then measuring the emitted visible light using specific wavelength of excitation (λex=340 nm and λem=385 nm for pyridoxine; λex=460 nm and λem=535 nm for riboflavin). The limits of detection (LOD) and quantification (LOQ) estimated through measurements of vitamin fluorescence were below 0.005 μg/ml for riboflavin and below 0.05 μg/ml for pyridoxine, respectively. In turn, the smallest credible cell density for measuring autofluorescence was set at 1×108 yeast cells/ml. The relative level of the cell's autofluorescence can be expressed in mass units by applying proper calculation formulas. A comparison of the autofluorescence-based method with the reference HPLC-UV method shows that autofluorescence measurement can be used in the screening analysis of vitamin content (especially riboflavin) in microbial cells.
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Affiliation(s)
- Roman Maslanka
- Institute of Biology, College of Natural Sciences, University of Rzeszow, Poland
| | - Michał Przywara
- Institute of Biology, College of Natural Sciences, University of Rzeszow, Poland
| | - Agnieszka Janeczko
- Institute of Biology, College of Natural Sciences, University of Rzeszow, Poland
| | - Renata Zadrag-Tecza
- Institute of Biology, College of Natural Sciences, University of Rzeszow, Poland
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11
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Eichner C, Paquette M, Müller-Axt C, Bock C, Budinger E, Gräßle T, Jäger C, Kirilina E, Lipp I, Morawski M, Rusch H, Wenk P, Weiskopf N, Wittig RM, Crockford C, Friederici AD, Anwander A. Detailed mapping of the complex fiber structure and white matter pathways of the chimpanzee brain. Nat Methods 2024; 21:1122-1130. [PMID: 38831210 PMCID: PMC11166572 DOI: 10.1038/s41592-024-02270-1] [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: 07/08/2022] [Accepted: 03/29/2024] [Indexed: 06/05/2024]
Abstract
Long-standing questions about human brain evolution may only be resolved through comparisons with close living evolutionary relatives, such as chimpanzees. This applies in particular to structural white matter (WM) connectivity, which continuously expanded throughout evolution. However, due to legal restrictions on chimpanzee research, neuroscience research currently relies largely on data with limited detail or on comparisons with evolutionarily distant monkeys. Here, we present a detailed magnetic resonance imaging resource to study structural WM connectivity in the chimpanzee. This open-access resource contains (1) WM reconstructions of a postmortem chimpanzee brain, using the highest-quality diffusion magnetic resonance imaging data yet acquired from great apes; (2) an optimized and validated method for high-quality fiber orientation reconstructions; and (3) major fiber tract segmentations for cross-species morphological comparisons. This dataset enabled us to identify phylogenetically relevant details of the chimpanzee connectome, and we anticipate that it will substantially contribute to understanding human brain evolution.
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Affiliation(s)
- Cornelius Eichner
- Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.
| | - Michael Paquette
- Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Christa Müller-Axt
- Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
- Faculty of Psychology, TU Dresden, Dresden, Germany
| | - Christian Bock
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
| | - Eike Budinger
- Leibniz Institute for Neurobiology, Combinatorial NeuroImaging Core Facility, Magdeburg, Germany
- Center for Behavioural Neurosciences, Magdeburg, Germany
| | - Tobias Gräßle
- Ecology and Emergence of Zoonotic Diseases, Helmholtz Institute for One Health, Helmholtz Centre for Infection Research, Greifswald, Germany
| | - Carsten Jäger
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
- Paul Flechsig Institute - Centre of Neuropathology and Brain Research, Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Evgeniya Kirilina
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
- Center for Cognitive Neuroscience Berlin, Free University Berlin, Berlin, Germany
| | - Ilona Lipp
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Markus Morawski
- Paul Flechsig Institute - Centre of Neuropathology and Brain Research, Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Henriette Rusch
- Paul Flechsig Institute - Centre of Neuropathology and Brain Research, Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Patricia Wenk
- Leibniz Institute for Neurobiology, Combinatorial NeuroImaging Core Facility, Magdeburg, Germany
| | - Nikolaus Weiskopf
- Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
- Felix Bloch Institute for Solid State Physics, Faculty of Physics and Earth Sciences, Leipzig University, Leipzig, Germany
| | - Roman M Wittig
- Department of Human Behavior, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Tai Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
- The Ape Social Mind Lab, Institut des Sciences Cognitives Marc Jeannerod, Lyon, France
| | - Catherine Crockford
- Department of Human Behavior, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Tai Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
- The Ape Social Mind Lab, Institut des Sciences Cognitives Marc Jeannerod, Lyon, France
| | - Angela D Friederici
- Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Alfred Anwander
- Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
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12
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Laquel P, Ayciriex S, Doignon F, Camougrand N, Fougère L, Rocher C, Wattelet-Boyer V, Bessoule JJ, Testet E. Mlg1, a yeast acyltransferase located in ER membranes associated with mitochondria (MAMs), is involved in de novo synthesis and remodelling of phospholipids. FEBS J 2024; 291:2683-2702. [PMID: 38297966 DOI: 10.1111/febs.17068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 11/27/2023] [Accepted: 01/17/2024] [Indexed: 02/02/2024]
Abstract
In cells, phospholipids contain acyl chains of variable lengths and saturation, features that affect their functions. Their de novo synthesis in the endoplasmic reticulum takes place via the cytidine diphosphate diacylglycerol (CDP-DAG) and Kennedy pathways, which are conserved in eukaryotes. PA is a key intermediate for all phospholipids (PI, PIPs, PS, PE, PC, PG and CL). The de novo synthesis of PA occurs by acylation of glycerophosphate leading to the synthesis of 1-acyl lysoPA and subsequent acylation of 1-acyl lysoPA at the sn-2 position. Using membranes from Escherichia coli overexpressing MLG1, we showed that the yeast gene MLG1 encodes an acyltransferase, leading specifically to the synthesis of PA from 1-acyl lysoPA. Moreover, after their de novo synthesis, phospholipids can be remodelled by acyl exchange with one and/or two acyl chains exchanged at the sn-1 and/or sn-2 position. Based on shotgun lipidomics of the reference and mlg1Δ strains, as well as biochemical assays for acyltransferase activities, we identified an additional remodelling activity for Mlg1p, namely, incorporation of palmitic acid into the sn-1 position of PS and PE. By using confocal microscopy and subcellular fractionation, we also found that this acyltransferase is located in ER membranes associated with mitochondria, a finding that highlights the importance of these organelles in the global cellular metabolism of lipids.
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Affiliation(s)
- Patricia Laquel
- Univ. Bordeaux, CNRS, LBM, UMR 5200, Villenave d'Ornon, France
| | - Sophie Ayciriex
- Univ. Lyon, CNRS, Université Claude Bernard Lyon 1, ISA, UMR 5280, Villeurbanne, France
| | | | | | - Louise Fougère
- Univ. Bordeaux, CNRS, LBM, UMR 5200, Villenave d'Ornon, France
| | | | | | | | - Eric Testet
- Univ. Bordeaux, CNRS, LBM, UMR 5200, Villenave d'Ornon, France
- Bordeaux INP, LBM, UMR 5200, Villenave d'Ornon, France
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13
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Tweel JED, Ecclestone BR, Boktor M, Dinakaran D, Mackey JR, Reza PH. Automated Whole Slide Imaging for Label-Free Histology Using Photon Absorption Remote Sensing Microscopy. IEEE Trans Biomed Eng 2024; 71:1901-1912. [PMID: 38231822 DOI: 10.1109/tbme.2024.3355296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
OBJECTIVE Pathologists rely on histochemical stains to impart contrast in thin translucent tissue samples, revealing tissue features necessary for identifying pathological conditions. However, the chemical labeling process is destructive and often irreversible or challenging to undo, imposing practical limits on the number of stains that can be applied to the same tissue section. Here we present an automated label-free whole slide scanner using a PARS microscope designed for imaging thin, transmissible samples. METHODS Peak SNR and in-focus acquisitions are achieved across entire tissue sections using the scattering signal from the PARS detection beam to measure the optimal focal plane. Whole slide images (WSI) are seamlessly stitched together using a custom contrast leveling algorithm. Identical tissue sections are subsequently H&E stained and brightfield imaged. The one-to-one WSIs from both modalities are visually and quantitatively compared. RESULTS PARS WSIs are presented at standard 40x magnification in malignant human breast and skin samples. We show correspondence of subcellular diagnostic details in both PARS and H&E WSIs and demonstrate virtual H&E staining of an entire PARS WSI. The one-to-one WSI from both modalities show quantitative similarity in nuclear features and structural information. CONCLUSION PARS WSIs are compatible with existing digital pathology tools, and samples remain suitable for histochemical, immunohistochemical, and other staining techniques. SIGNIFICANCE This work is a critical advance for integrating label-free optical methods into standard histopathology workflows.
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14
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Aeindartehran L, Sadri Z, Rahimi F, Alinejad T. Fluorescence in depth: integration of spectroscopy and imaging with Raman, IR, and CD for advanced research. Methods Appl Fluoresc 2024; 12:032002. [PMID: 38697201 DOI: 10.1088/2050-6120/ad46e6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 05/02/2024] [Indexed: 05/04/2024]
Abstract
Fluorescence spectroscopy serves as a vital technique for studying the interaction between light and fluorescent molecules. It encompasses a range of methods, each presenting unique advantages and applications. This technique finds utility in various chemical studies. This review discusses Fluorescence spectroscopy, its branches such as Time-Resolved Fluorescence Spectroscopy (TRFS) and Fluorescence Lifetime Imaging Microscopy (FLIM), and their integration with other spectroscopic methods, including Raman, Infrared (IR), and Circular Dichroism (CD) spectroscopies. By delving into these methods, we aim to provide a comprehensive understanding of the capabilities and significance of fluorescence spectroscopy in scientific research, highlighting its diverse applications and the enhanced understanding it brings when combined with other spectroscopic methods. This review looks at each technique's unique features and applications. It discusses the prospects of their combined use in advancing scientific understanding and applications across various domains.
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Affiliation(s)
- Lida Aeindartehran
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States of America
| | - Zahra Sadri
- Department of Biological Science, Southern Methodist University, Dallas, Texas 75205, United States of America
| | - Fateme Rahimi
- Department of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
| | - Tahereh Alinejad
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou 325015, Zhejiang, People's Republic of China
- Institute of Cell Growth Factor, Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision, and Brain Health), Wenzhou Medical University, Wenzhou 325000, People's Republic of China
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15
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Prater CB, Kjoller KJ, Stuart APD, Grigg DA, 'Limurn R, Gough KM. Widefield Super-Resolution Infrared Spectroscopy and Imaging of Autofluorescent Biological Materials and Photosynthetic Microorganisms Using Fluorescence Detected Photothermal Infrared (FL-PTIR). APPLIED SPECTROSCOPY 2024:37028241256978. [PMID: 38803165 DOI: 10.1177/00037028241256978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
We have demonstrated high-speed, super-resolution infrared (IR) spectroscopy and chemical imaging of autofluorescent biomaterials and organisms using camera-based widefield photothermal detection that takes advantage of temperature-dependent modulations of autofluorescent emission. A variety of biological materials and photosynthetic organisms exhibit strong autofluorescence emission under ultraviolet excitation and the autofluorescent emission has a very strong temperature dependence, of order 1%/K. Illuminating a sample with pulses of IR light from a wavelength-tunable laser source causes periodic localized sample temperature increases that result in a corresponding transient decrease in autofluorescent emission. A low-cost light-emitting diode-based fluorescence excitation source was used in combination with a conventional fluorescence microscopy camera to detect localized variations in autofluorescent emission over a wide area as an indicator of localized IR absorption. IR absorption image stacks were acquired over a range of IR wavelengths, including the fingerprint spectral range, enabling extraction of localized IR absorption spectra. We have applied widefield fluorescence detected photothermal IR (FL-PTIR) to an analysis of autofluorescent biological materials including collagen, leaf tissue, and photosynthetic organisms including diatoms and green microalgae cells. We have also demonstrated the FL-PTIR on live microalgae in water, demonstrating the potential for label-free dynamic chemical imaging of autofluorescent cells.
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Affiliation(s)
- Craig B Prater
- Photothermal Spectroscopy Corporation, Santa Barbara, California, USA
| | - Kevin J Kjoller
- Photothermal Spectroscopy Corporation, Santa Barbara, California, USA
| | - Andrew P D Stuart
- Photothermal Spectroscopy Corporation, Santa Barbara, California, USA
| | - David A Grigg
- Photothermal Spectroscopy Corporation, Santa Barbara, California, USA
| | - Rinuk 'Limurn
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
| | - Kathleen M Gough
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
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16
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Hoffmann C, Cho E, Zalesky A, Di Biase MA. From pixels to connections: exploring in vitro neuron reconstruction software for network graph generation. Commun Biol 2024; 7:571. [PMID: 38750282 PMCID: PMC11096190 DOI: 10.1038/s42003-024-06264-9] [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: 11/10/2023] [Accepted: 04/29/2024] [Indexed: 05/18/2024] Open
Abstract
Digital reconstruction has been instrumental in deciphering how in vitro neuron architecture shapes information flow. Emerging approaches reconstruct neural systems as networks with the aim of understanding their organization through graph theory. Computational tools dedicated to this objective build models of nodes and edges based on key cellular features such as somata, axons, and dendrites. Fully automatic implementations of these tools are readily available, but they may also be purpose-built from specialized algorithms in the form of multi-step pipelines. Here we review software tools informing the construction of network models, spanning from noise reduction and segmentation to full network reconstruction. The scope and core specifications of each tool are explicitly defined to assist bench scientists in selecting the most suitable option for their microscopy dataset. Existing tools provide a foundation for complete network reconstruction, however more progress is needed in establishing morphological bases for directed/weighted connectivity and in software validation.
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Affiliation(s)
- Cassandra Hoffmann
- Systems Neuroscience Lab, Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Parkville, Australia.
| | - Ellie Cho
- Biological Optical Microscopy Platform, University of Melbourne, Parkville, Australia
| | - Andrew Zalesky
- Systems Neuroscience Lab, Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Parkville, Australia
- Department of Biomedical Engineering, The University of Melbourne, Parkville, Australia
| | - Maria A Di Biase
- Systems Neuroscience Lab, Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Parkville, Australia
- Stem Cell Disease Modelling Lab, Department of Anatomy and Physiology, The University of Melbourne, Parkville, Australia
- Psychiatry Neuroimaging Laboratory, Department of Psychiatry, Brigham and Women's Hospital, Harvard Medical School, Boston, USA
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17
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Ghosh B, Chatterjee J, Paul RR, Acuña S, Lahiri P, Pal M, Mitra P, Agarwal K. Molecular histopathology of matrix proteins through autofluorescence super-resolution microscopy. Sci Rep 2024; 14:10524. [PMID: 38719976 PMCID: PMC11078950 DOI: 10.1038/s41598-024-61178-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 05/02/2024] [Indexed: 05/12/2024] Open
Abstract
Extracellular matrix diseases like fibrosis are elusive to diagnose early on, to avoid complete loss of organ function or even cancer progression, making early diagnosis crucial. Imaging the matrix densities of proteins like collagen in fixed tissue sections with suitable stains and labels is a standard for diagnosis and staging. However, fine changes in matrix density are difficult to realize by conventional histological staining and microscopy as the matrix fibrils are finer than the resolving capacity of these microscopes. The dyes further blur the outline of the matrix and add a background that bottlenecks high-precision early diagnosis of matrix diseases. Here we demonstrate the multiple signal classification method-MUSICAL-otherwise a computational super-resolution microscopy technique to precisely estimate matrix density in fixed tissue sections using fibril autofluorescence with image stacks acquired on a conventional epifluorescence microscope. We validated the diagnostic and staging performance of the method in extracted collagen fibrils, mouse skin during repair, and pre-cancers in human oral mucosa. The method enables early high-precision label-free diagnosis of matrix-associated fibrotic diseases without needing additional infrastructure or rigorous clinical training.
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Affiliation(s)
- Biswajoy Ghosh
- Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
- UiT - The Arctic University of Norway, 9019, Tromsø, Norway.
| | | | - Ranjan Rashmi Paul
- Guru Nanak Institute of Dental Sciences and Research, Kolkata, West Bengal, 700114, India
| | | | - Pooja Lahiri
- Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Mousumi Pal
- Guru Nanak Institute of Dental Sciences and Research, Kolkata, West Bengal, 700114, India
| | - Pabitra Mitra
- Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Krishna Agarwal
- UiT - The Arctic University of Norway, 9019, Tromsø, Norway.
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18
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Waldmann M, Bohner M, Baghnavi A, Riedel B, Seidenstuecker M. Awareness for artifacts in fluorescence microscopy of β-TCP. BMC Res Notes 2024; 17:122. [PMID: 38685087 PMCID: PMC11059721 DOI: 10.1186/s13104-024-06781-0] [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: 03/05/2024] [Accepted: 04/18/2024] [Indexed: 05/02/2024] Open
Abstract
Fluorescence analysis of β-TCP ceramics is often used to describe cells found on said ceramics. However, we found, to our knowledge, so far undescribed artifacts which might sometimes be hard to differentiate from cells due to shape and fluorescence behavior. We tried prolonged ultrasound washing as well as Technovit 9100 fixation to reduce these artifacts. While untreated dowels showed no reduction in artifacts no matter the further treatment, Technovit fixation reduced the artifacts with even further reduction achieved by mechanical cleaning. As a consequence, scientists working with these dowels and likely even other types should try to avoid creating false positive results by considering the existence of these artifacts, checking additional filters for unusual fluorescence and by reducing them by using Technovit fixation when possible.
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Affiliation(s)
- Marco Waldmann
- G.E.R.N. Tissue Replacement, Regeneration & Neogenesis, Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center-Albert-Ludwigs-University of Freiburg, Albert-Ludwigs- University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany.
| | - Marc Bohner
- Robert Mathys Foundation RMS, Bischmattstr. 12, Bettlach, 2544, Switzerland
| | - Anna Baghnavi
- G.E.R.N. Tissue Replacement, Regeneration & Neogenesis, Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center-Albert-Ludwigs-University of Freiburg, Albert-Ludwigs- University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany
| | - Bianca Riedel
- G.E.R.N. Tissue Replacement, Regeneration & Neogenesis, Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center-Albert-Ludwigs-University of Freiburg, Albert-Ludwigs- University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany
| | - Michael Seidenstuecker
- G.E.R.N. Tissue Replacement, Regeneration & Neogenesis, Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center-Albert-Ludwigs-University of Freiburg, Albert-Ludwigs- University of Freiburg, Hugstetter Straße 55, 79106, Freiburg, Germany
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19
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Fu B, Brock EE, Andrews R, Breiter JC, Tian R, Toomey CE, Lachica J, Lashley T, Ryten M, Wood NW, Vendruscolo M, Gandhi S, Weiss LE, Beckwith JS, Lee SF. RASP: Optimal Single Puncta Detection in Complex Cellular Backgrounds. J Phys Chem B 2024; 128:3585-3597. [PMID: 38593280 PMCID: PMC11033865 DOI: 10.1021/acs.jpcb.4c00174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/01/2024] [Accepted: 03/25/2024] [Indexed: 04/11/2024]
Abstract
Super-resolution and single-molecule microscopies have been increasingly applied to complex biological systems. A major challenge of these approaches is that fluorescent puncta must be detected in the low signal, high noise, heterogeneous background environments of cells and tissue. We present RASP, Radiality Analysis of Single Puncta, a bioimaging-segmentation method that solves this problem. RASP removes false-positive puncta that other analysis methods detect and detects features over a broad range of spatial scales: from single proteins to complex cell phenotypes. RASP outperforms the state-of-the-art methods in precision and speed using image gradients to separate Gaussian-shaped objects from the background. We demonstrate RASP's power by showing that it can extract spatial correlations between microglia, neurons, and α-synuclein oligomers in the human brain. This sensitive, computationally efficient approach enables fluorescent puncta and cellular features to be distinguished in cellular and tissue environments, with sensitivity down to the level of the single protein. Python and MATLAB codes, enabling users to perform this RASP analysis on their own data, are provided as Supporting Information and links to third-party repositories.
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Affiliation(s)
- Bin Fu
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield
Road, Cambridge CB2 1EW, U.K.
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
| | - Emma E. Brock
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield
Road, Cambridge CB2 1EW, U.K.
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
| | - Rebecca Andrews
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield
Road, Cambridge CB2 1EW, U.K.
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
| | - Jonathan C. Breiter
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield
Road, Cambridge CB2 1EW, U.K.
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- Centre
for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
| | - Ru Tian
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield
Road, Cambridge CB2 1EW, U.K.
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- Centre
for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
| | - Christina E. Toomey
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- The
Queen Square Brain Bank for Neurological Disorders, Department of
Clinical and Movement Neuroscience, UCL
Queen Square Institute of Neurology, London WC1N 3BG, U.K.
- Department
of Neurodegenerative Diseases, UCL Queen
Square Institute of Neurology, London WC1N 3BG, U.K.
| | - Joanne Lachica
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- The
Queen Square Brain Bank for Neurological Disorders, Department of
Clinical and Movement Neuroscience, UCL
Queen Square Institute of Neurology, London WC1N 3BG, U.K.
- The
Francis Crick Institute, King’s Cross, London NW1 1AT, U.K.
| | - Tammaryn Lashley
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- The
Queen Square Brain Bank for Neurological Disorders, Department of
Clinical and Movement Neuroscience, UCL
Queen Square Institute of Neurology, London WC1N 3BG, U.K.
- Department
of Neurodegenerative Diseases, UCL Queen
Square Institute of Neurology, London WC1N 3BG, U.K.
| | - Mina Ryten
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- Great
Ormond Street Institute of Child Health, University College London, London WC1E 6BT, U.K.
- UK
Dementia Research Institute at the University of Cambridge, Cambridge CB2 0AH, U.K.
- Department
of Clinical Neurosciences, School of Clinical Medicine, University of Cambridge, Cambridge CB2 0SP, U.K.
| | - Nicholas W. Wood
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- Department
of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London WC1N 3BG, U.K.
| | - Michele Vendruscolo
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- Centre
for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
| | - Sonia Gandhi
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
- Department
of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London WC1N 3BG, U.K.
- The
Francis Crick Institute, King’s Cross, London NW1 1AT, U.K.
| | - Lucien E. Weiss
- Department of Engineering Physics, Polytechnique
Montréal, Montréal, Québec H3T 1J4, Canada
| | - Joseph S. Beckwith
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield
Road, Cambridge CB2 1EW, U.K.
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
| | - Steven F. Lee
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield
Road, Cambridge CB2 1EW, U.K.
- Aligning
Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland 20815, United States
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20
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Fang N, Wu Z, Su X, Chen R, Shi L, Feng Y, Huang Y, Zhang X, Li L, Zheng L, Hu L, Kang D, Wang X, Chen J. Computer-Aided Multiphoton Microscopy Diagnosis of 5 Different Primary Architecture Subtypes of Meningiomas. J Transl Med 2024; 104:100324. [PMID: 38220044 DOI: 10.1016/j.labinv.2024.100324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 12/19/2023] [Accepted: 01/02/2024] [Indexed: 01/16/2024] Open
Abstract
Meningiomas rank among the most common intracranial tumors, and surgery stands as the primary treatment modality for meningiomas. The precise subtyping and diagnosis of meningiomas, both before and during surgery, play a pivotal role in enabling neurosurgeons choose the optimal surgical program. In this study, we utilized multiphoton microscopy (MPM) based on 2-photon excited fluorescence and second-harmonic generation to identify 5 common meningioma subtypes. The morphological features of these subtypes were depicted using the MPM multichannel mode. Additionally, we developed 2 distinct programs to quantify collagen content and blood vessel density. Furthermore, the lambda mode of the MPM characterized architectural and spectral features, from which 3 quantitative indicators were extracted. Moreover, we employed machine learning to differentiate meningioma subtypes automatically, achieving high classification accuracy. These findings demonstrate the potential of MPM as a noninvasive diagnostic tool for meningioma subtyping and diagnosis, offering improved accuracy and resolution compared with traditional methods.
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Affiliation(s)
- Na Fang
- School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Zanyi Wu
- Department of Neurosurgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Xiaoli Su
- Department of Pathology, the First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Rong Chen
- School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Linjing Shi
- School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Yanzhen Feng
- School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Yuqing Huang
- School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Xinlei Zhang
- School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Lianhuang Li
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, China
| | - Liqin Zheng
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, China
| | - Liwen Hu
- Department of Pathology, the First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Dezhi Kang
- Department of Neurosurgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
| | - Xingfu Wang
- Department of Pathology, the First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
| | - Jianxin Chen
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, China.
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21
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Moelleken M, Krimphove SH, Krefting F, Benson S, Rammos C, Cyrek AE, Dissemond J. How effective is simple mechanical wound debridement in reducing bacterial colonisation? Results of a prospective clinical study. Int Wound J 2024; 21:e14824. [PMID: 38512118 PMCID: PMC10956538 DOI: 10.1111/iwj.14824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 02/18/2024] [Accepted: 02/23/2024] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND AND AIMS Bacteria in wounds can lead to stagnation of wound healing as well as to local or even systemic wound infections up to potentially lethal sepsis. Consequently, the bacterial load should be reduced as part of wound treatment. Therefore, the efficacy of simple mechanical wound debridement should be investigated in terms of reducing bacterial colonisation. PATIENTS AND METHODS Patients with acute or chronic wounds were assessed for bacterial colonisation with a fluorescence camera before and after mechanical wound debridement with sterile cotton pads. If bacterial colonisation persisted, a second, targeted wound debridement was performed. RESULTS A total of 151 patients, 68 (45.0%) men and 83 (55.0%) women were included in this study. The male mean age was 71.0 years and the female 65.1 years. By establishing a new analysis method for the image files, we could document that the bacterial colonised areas were distributed 21.9% on the wound surfaces, 60.5% on the wound edges (up to 0.5 cm) and 17.6% on the wound surroundings (up to 1.5 cm). One mechanical debridement achieved a significant reduction of bacterial colonised areas by an average of 29.6% in the wounds, 18.9% in the wound edges and 11.8% in the wound surroundings and was increased by performing it a second time. CONCLUSIONS It has been shown that even a simple mechanical debridement with cotton pads can significantly reduce bacterial colonisation without relevant side effects. In particular, the wound edges were the areas that were often most contaminated with bacteria and should be included in the debridement with special attention. Since bacteria remain in wounds after mechanical debridement, it cannot replace antimicrobial therapy strategies, but offer a complementary strategy to improve wound care. Thus, it could be shown that simple mechanical debridement is effective in reducing bacterial load and should be integrated into a therapeutic approach to wounds whenever appropriate.
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Affiliation(s)
- Maurice Moelleken
- Department of Dermatology, Venerology and AllergologyUniversity Hospital of EssenEssenGermany
| | | | - Frederik Krefting
- Department of Dermatology, Venerology and AllergologyUniversity Hospital of EssenEssenGermany
| | - Sven Benson
- University Hospital of Essen, Institute of Medical Psychology and Behavioral Immunobiology, Institute of Medical Education, Centre for Translational Neuro‐ and Behavioral SciencesEssenGermany
| | - Christos Rammos
- Department of Cardiology and AngiologyUniversity Hospital of EssenEssenGermany
| | - Anna Ewa Cyrek
- Division of Vascular and Endovascular Surgery, Department of General, Visceral and Transplant SurgeryUniversity Hospital of EssenEssenGermany
| | - Joachim Dissemond
- Department of Dermatology, Venerology and AllergologyUniversity Hospital of EssenEssenGermany
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22
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Huang B, Kang L, Tsang VTC, Lo CTK, Wong TTW. Deep learning-assisted smartphone-based quantitative microscopy for label-free peripheral blood smear analysis. BIOMEDICAL OPTICS EXPRESS 2024; 15:2636-2651. [PMID: 38633093 PMCID: PMC11019683 DOI: 10.1364/boe.511384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/24/2024] [Accepted: 01/30/2024] [Indexed: 04/19/2024]
Abstract
Hematologists evaluate alterations in blood cell enumeration and morphology to confirm peripheral blood smear findings through manual microscopic examination. However, routine peripheral blood smear analysis is both time-consuming and labor-intensive. Here, we propose using smartphone-based autofluorescence microscopy (Smart-AM) for imaging label-free blood smears at subcellular resolution with automatic hematological analysis. Smart-AM enables rapid and label-free visualization of morphological features of normal and abnormal blood cells (including leukocytes, erythrocytes, and thrombocytes). Moreover, assisted with deep-learning algorithms, this technique can automatically detect and classify different leukocytes with high accuracy, and transform the autofluorescence images into virtual Giemsa-stained images which show clear cellular features. The proposed technique is portable, cost-effective, and user-friendly, making it significant for broad point-of-care applications.
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Affiliation(s)
- Bingxin Huang
- Translational and Advanced Bioimaging Laboratory, Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
| | - Lei Kang
- Translational and Advanced Bioimaging Laboratory, Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
| | - Victor T. C. Tsang
- Translational and Advanced Bioimaging Laboratory, Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
| | - Claudia T. K. Lo
- Translational and Advanced Bioimaging Laboratory, Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
| | - Terence T. W. Wong
- Translational and Advanced Bioimaging Laboratory, Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
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23
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Niehaus P, Gonzalez de Vega R, Haindl MT, Birkl C, Leoni M, Birkl-Toeglhofer AM, Haybaeck J, Ropele S, Seeba M, Goessler W, Karst U, Langkammer C, Clases D. Multimodal analytical tools for the molecular and elemental characterisation of lesions in brain tissue of multiple sclerosis patients. Talanta 2024; 270:125518. [PMID: 38128277 DOI: 10.1016/j.talanta.2023.125518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/01/2023] [Accepted: 12/03/2023] [Indexed: 12/23/2023]
Abstract
Multiple sclerosis (MS) is a prevalent immune-mediated inflammatory disease of the central nervous system inducing a widespread degradation of myelin and resulting in neurological deficits. Recent advances in molecular and atomic imaging provide the means to probe the microenvironment in affected brain tissues at an unprecedented level of detail and may provide new insights. This study showcases state-of-the-art spectroscopic and mass spectrometric techniques to compare distributions of molecular and atomic entities in MS lesions and surrounding brain tissues. MS brains underwent post-mortem magnetic resonance imaging (MRI) to locate and subsequently dissect MS lesions and surrounding white matter. Digests of lesions and unaffected white matter were analysed via ICP-MS/MS revealing significant differences in concentrations of Li, Mg, P, K, Mn, V, Rb, Ag, Gd and Bi. Micro x-ray fluorescence spectroscopy (μXRF) and laser ablation - inductively coupled plasma - time of flight - mass spectrometry (LA-ICP-ToF-MS) were used as micro-analytical imaging techniques to study distributions of both endogenous and xenobiotic elements. The essential trace elements Fe, Cu and Zn were subsequently calibrated using in-house manufactured gelatine standards. Lipid distributions were studied using IR-micro spectroscopy and matrix assisted laser desorption/ionisation mass spectrometry imaging (MALDI-MSI). MALDI-MSI was complemented with high-resolution tandem mass spectrometry and trapped ion mobility spectroscopy for the annotation of specified phospho- and sphingolipids, revealing specific lipid species decreased in MS lesions compared to surrounding white matter. This explorative study demonstrated that modern molecular and atomic mapping techniques provide high-resolution imaging for relevant bio-indicative entities which may complement our current understanding of the underlying pathophysiological processes.
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Affiliation(s)
- Peter Niehaus
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany
| | | | | | - Christoph Birkl
- Department of Radiology, Medical University of Innsbruck, Austria
| | - Marlene Leoni
- Diagnostic and Research Center for Molecular Biomedicine, Institute of Pathology, Medical University of Graz, Austria
| | - Anna Maria Birkl-Toeglhofer
- Diagnostic and Research Center for Molecular Biomedicine, Institute of Pathology, Medical University of Graz, Austria; Institute of Pathology, Neuropathology and Molecular Pathology, Medical University of Innsbruck, Austria
| | - Johannes Haybaeck
- Diagnostic and Research Center for Molecular Biomedicine, Institute of Pathology, Medical University of Graz, Austria
| | - Stefan Ropele
- Department of Neurology, Medical University of Graz, Austria
| | | | | | - Uwe Karst
- Institute of Inorganic and Analytical Chemistry, University of Münster, Germany
| | | | - David Clases
- Institute of Chemistry, University of Graz, Austria.
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24
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Stratigaki M, Armirotti A, Ottonello G, Manente S, Traviglia A. Fungal and bacterial species richness in biodeteriorated seventeenth century Venetian manuscripts. Sci Rep 2024; 14:7003. [PMID: 38523163 PMCID: PMC10961312 DOI: 10.1038/s41598-024-57228-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 03/15/2024] [Indexed: 03/26/2024] Open
Abstract
Historical paper documents are susceptible to complex degradation processes, including biodeterioration, which can progressively compromise their aesthetic and structural integrity. This study analyses seventeenth century handwritten historical letters stored at the Correr Museum Library in Venice, Italy, exhibiting pronounced signs of biodeterioration. The techniques used encompassed traditional colony isolation on agar plates and proteomics analyses, employing nanoscale liquid chromatography coupled with high-resolution mass spectrometry (nano-LC-MS). Fluorescence microscopy was used for the first time in the historical paper biodeterioration context to supplement the conventional stereoscopic, optical, and scanning electron microscopic imaging techniques. This method enables the visualisation of microorganisms beyond and beneath the paper's surface through their natural intrinsic autofluorescence in a non-invasive and non-destructive way. The results demonstrate a diverse, complex, and abundant microbiota composed of coexisting fungal and bacterial species (Ascomycota, Mucoromycota, Basidiomycota, Proteobacteria, and Actinobacteria), along with mite carcasses, insects, parasites, and possibly protists. Furthermore, this study reveals certain species that were not previously documented in the biodeterioration of historical paper, including human pathogens, such as Histoplasma capsulatum, Brucella, Candida albicans, and species of Aspergillus (A. flavus, A. fumigatus, A. oryzae, A. terreus, A. niger) known to cause infections or produce mycotoxins, posing substantial risk to both artefacts and humans.
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Affiliation(s)
- Maria Stratigaki
- Center for Cultural Heritage Technology (CCHT), Istituto Italiano di Tecnologia, Via Torino 155, 30172, Venice, Italy.
| | - Andrea Armirotti
- Analytical Chemistry Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy
| | - Giuliana Ottonello
- Analytical Chemistry Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy
| | - Sabrina Manente
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172, Venice, Italy
| | - Arianna Traviglia
- Center for Cultural Heritage Technology (CCHT), Istituto Italiano di Tecnologia, Via Torino 155, 30172, Venice, Italy
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25
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Su F, Chen S, Liu Y, Zhou J, Du Z, Luo X, Wen S, Jin D. Lanthanide Complex for Single-Molecule Fluorescent in Situ Hybridization and Background-Free Imaging. Anal Chem 2024; 96:4430-4436. [PMID: 38447029 DOI: 10.1021/acs.analchem.3c04530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Traditional single-molecule fluorescence in situ hybridization (smFISH) methods for RNA detection often face sensitivity challenges due to the low fluorescence intensity of the probe. Also, short-lived autofluorescence complicates obtaining clear signals from tissue sections. In response, we have developed an smFISH probe using highly grafted lanthanide complexes to address both concentration quenching and autofluorescence background. Our approach involves an oligo PCR incorporating azide-dUTP, enabling conjugation with lanthanide complexes. This method has proven to be stable, convenient, and cost-effective. Notably, for the mRNA detection in SKBR3 cells, the lanthanide probe group exhibited 2.5 times higher luminescence intensity and detected 3 times more signal points in cells compared with the Cy3 group. Furthermore, we successfully applied the probe to image HER2 mRNA molecules in breast cancer FFPE tissue sections, achieving a 2.7-fold improvement in sensitivity compared to Cy3-based probes. These results emphasize the potential of time-resolved smFISH as a highly sensitive method for nucleic acid detection, free of background fluorescence interference.
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Affiliation(s)
- Fei Su
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sidney, NSW 2007, Australia
| | - Shiyu Chen
- UTS-SUStech Joint Research Centre for Biomedical Materials and Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China
| | - Yuanhua Liu
- UTS-SUStech Joint Research Centre for Biomedical Materials and Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China
| | - Jiajia Zhou
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sidney, NSW 2007, Australia
| | - Zhongbo Du
- UTS-SUStech Joint Research Centre for Biomedical Materials and Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China
| | - Xiongjian Luo
- UTS-SUStech Joint Research Centre for Biomedical Materials and Devices, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China
| | - Shihui Wen
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sidney, NSW 2007, Australia
- Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo, Zhejiang 315200, P. R. China
| | - Dayong Jin
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sidney, NSW 2007, Australia
- Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo, Zhejiang 315200, P. R. China
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26
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Boudna M, Campos AD, Vychytilova-Faltejskova P, Machackova T, Slaby O, Souckova K. Strategies for labelling of exogenous and endogenous extracellular vesicles and their application for in vitro and in vivo functional studies. Cell Commun Signal 2024; 22:171. [PMID: 38461237 PMCID: PMC10924393 DOI: 10.1186/s12964-024-01548-3] [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: 11/19/2023] [Accepted: 02/29/2024] [Indexed: 03/11/2024] Open
Abstract
This review presents a comprehensive overview of labelling strategies for endogenous and exogenous extracellular vesicles, that can be utilised both in vitro and in vivo. It covers a broad spectrum of approaches, including fluorescent and bioluminescent labelling, and provides an analysis of their applications, strengths, and limitations. Furthermore, this article presents techniques that use radioactive tracers and contrast agents with the ability to track EVs both spatially and temporally. Emphasis is also placed on endogenous labelling mechanisms, represented by Cre-lox and CRISPR-Cas systems, which are powerful and flexible tools for real-time EV monitoring or tracking their fate in target cells. By summarizing the latest developments across these diverse labelling techniques, this review provides researchers with a reference to select the most appropriate labelling method for their EV based research.
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Affiliation(s)
- Marie Boudna
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic
| | - Andres Delgado Campos
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic
| | | | - Tana Machackova
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic
| | - Ondrej Slaby
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic.
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic.
| | - Kamila Souckova
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic.
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27
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Ferrer-Font L, Burn OK, Mayer JU, Price KM. Immunophenotyping challenging tissue types using high-dimensional full spectrum flow cytometry. Methods Cell Biol 2024; 186:51-90. [PMID: 38705606 DOI: 10.1016/bs.mcb.2024.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
Technological advancements in fluorescence flow cytometry and an ever-expanding understanding of the complexity of the immune system, have led to the development of large flow cytometry panels, reaching up to 40 markers at the single-cell level. Full spectrum flow cytometry, that measures the full emission range of all the fluorophores present in the panel instead of only the emission peaks is now routinely used in many laboratories internationally, and the demand for this technology is rapidly increasing. With the capacity to use larger and more complex staining panels, optimized protocols are required for the best panel design, panel validation and high-dimensional data analysis outcomes. In addition, for ex vivo experiments, tissue preparation methods for single-cell analysis should also be optimized to ensure that samples are of the highest quality and are truly representative of tissues in situ. Here we provide optimized step-by-step protocols for full spectrum flow cytometry panel design, tissue digestion and panel optimization to facilitate the analysis of challenging tissue types.
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Affiliation(s)
- Laura Ferrer-Font
- Hugh Green Cytometry Centre, Malaghan Institute of Medical Research, Wellington, New Zealand.
| | - Olivia K Burn
- Malaghan Institute of Medical Research, Wellington, New Zealand
| | - Johannes U Mayer
- Department of Dermatology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Kylie M Price
- Hugh Green Cytometry Centre, Malaghan Institute of Medical Research, Wellington, New Zealand
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28
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Xu M, Wang H, Tian X, Li B, Wang S, Zhao X, He H. Opsin-Free Activation of Bmp Receptors by a Femtosecond Laser. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308072. [PMID: 38239021 PMCID: PMC10933676 DOI: 10.1002/advs.202308072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/13/2023] [Indexed: 03/14/2024]
Abstract
Bone morphogenetic protein (BMP) signaling plays a vital role in differentiation, organogenesis, and various cell processes. As a member of TGF-β superfamily, the BMP initiation usually accompanies crosstalk with other signaling pathways and simultaneously activates some of them. It is quite challenging to solely initiate an individual pathway. In this study, an opsin-free optical method to specifically activate BMP receptors (BMPR) and subsequent pSmad1/5/8 cascades by a single-time scan of a tightly-focused femtosecond laser in the near infrared range is reported. Via transient two-photon excitation to intrinsic local flavins near the cell membrane, the photoactivation drives conformational changes of preformed BMPR complexes to enable their bonding and phosphorylation of the GS domain in BMPR-I by BMPR-II. The pSmad1/5/8 signaling is initiated by this method, while p38 and pSmad2 are rarely perturbed. Based on a microscopic system, primary adipose-derived stem cells in an area of 420 × 420 µm2 are photoactivated by a single-time laser scanning for 1.5 s and exhibit pSmad1/5/8 upregulation and osteoblastic differentiation after 21 days. Hence, an opsin-free, specific, and noninvasive optical method to initiate BMP signaling, easily accomplished by a two-photon microscope system is reported.
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Affiliation(s)
- Manjun Xu
- School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai200031China
| | - Haipeng Wang
- School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai200031China
| | - Xiaoying Tian
- School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai200031China
| | - Bingyi Li
- School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai200031China
| | - Shaoyang Wang
- School of Biomedical EngineeringHainan UniversityHaikou570228China
| | - Xiaohui Zhao
- School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai200031China
| | - Hao He
- School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai200031China
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29
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Orlova AV, Shmychkov NV, Vlasova KY, Iakimova TM, Lepnev LS, Eliseev AA, Utochnikova VV. Ytterbium 10-carboxyperylene-3,4,9-tricarboxylates for targeted NIR luminescent bioimaging. Dalton Trans 2024; 53:3980-3984. [PMID: 38349065 DOI: 10.1039/d3dt04298g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Two new ytterbium coordination compounds Yb(HPTC)(H2O)2 (Yb1) and Yb(HPTC)(Phen) (Yb2) were obtained using 10-carboxyperylene-3,4,9-tricarboxylate ion (HPTC3-) as a sensitizer. Both coordination compounds exhibited intense NIR-II luminescence upon excitation in the visible range and formed stable suspensions with nanoparticles of 50-70 nm in size in an aqueous solution of sodium alginate. Both complexes demonstrated non-toxicity up to at least 25 mg L-1 in two cell cultures: cancer cells MCF7 and embryonic cells HEK293T - making them suitable for bioimaging. For both complexes, the accumulation in cells was directly measured and it was shown that the accumulation of Yb2 was the same for both cell types (0.51-0.52 πg per cell), while Yb1 demonstrated selective accumulation in cancer cells (0.04 πg per cell for HEK293T and 7.00 πg per cell for MCF7). Thus, Yb1 can also be proposed as a selective vis-excited NIR emitting bioprobe.
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Affiliation(s)
- Anastasia V Orlova
- M.V. Lomonosov Moscow State University, 1/3 Leninskie Gory, Moscow, 119991, Russia.
| | - Nazar V Shmychkov
- M.V. Lomonosov Moscow State University, 1/3 Leninskie Gory, Moscow, 119991, Russia.
| | - Kseniia Yu Vlasova
- M.V. Lomonosov Moscow State University, 1/3 Leninskie Gory, Moscow, 119991, Russia.
| | - Tamara M Iakimova
- M.V. Lomonosov Moscow State University, 1/3 Leninskie Gory, Moscow, 119991, Russia.
| | - Leonid S Lepnev
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, Leninsky Prosp. 53, Moscow, 119992, Russia
| | - Andrei A Eliseev
- M.V. Lomonosov Moscow State University, 1/3 Leninskie Gory, Moscow, 119991, Russia.
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30
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Kozma E, Kele P. Bioorthogonal Reactions in Bioimaging. Top Curr Chem (Cham) 2024; 382:7. [PMID: 38400853 PMCID: PMC10894152 DOI: 10.1007/s41061-024-00452-1] [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: 10/27/2023] [Accepted: 01/22/2024] [Indexed: 02/26/2024]
Abstract
Visualization of biomolecules in their native environment or imaging-aided understanding of more complex biomolecular processes are one of the focus areas of chemical biology research, which requires selective, often site-specific labeling of targets. This challenging task is effectively addressed by bioorthogonal chemistry tools in combination with advanced synthetic biology methods. Today, the smart combination of the elements of the bioorthogonal toolbox allows selective installation of multiple markers to selected targets, enabling multicolor or multimodal imaging of biomolecules. Furthermore, recent developments in bioorthogonally applicable probe design that meet the growing demands of superresolution microscopy enable more complex questions to be addressed. These novel, advanced probes enable highly sensitive, low-background, single- or multiphoton imaging of biological species and events in live organisms at resolutions comparable to the size of the biomolecule of interest. Herein, the latest developments in bioorthogonal fluorescent probe design and labeling schemes will be discussed in the context of in cellulo/in vivo (multicolor and/or superresolved) imaging schemes. The second part focuses on the importance of genetically engineered minimal bioorthogonal tags, with a particular interest in site-specific protein tagging applications to answer biological questions.
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Affiliation(s)
- Eszter Kozma
- Chemical Biology Research Group, Institute of Organic Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar Tudósok Krt. 2, Budapest, 1117, Hungary
| | - Péter Kele
- Chemical Biology Research Group, Institute of Organic Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar Tudósok Krt. 2, Budapest, 1117, Hungary.
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31
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Lepekhina TB, Nikolaev VV, Darvin ME, Zuhayri H, Snegerev MS, Lozhkomoev AS, Senkina EI, Kokhanenko AP, Lozovoy KA, Kistenev YV. Two-Photon-Excited FLIM of NAD(P)H and FAD-Metabolic Activity of Fibroblasts for the Diagnostics of Osteoimplant Survival. Int J Mol Sci 2024; 25:2257. [PMID: 38396933 PMCID: PMC10889693 DOI: 10.3390/ijms25042257] [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: 12/21/2023] [Revised: 02/04/2024] [Accepted: 02/11/2024] [Indexed: 02/25/2024] Open
Abstract
Bioinert materials such as the zirconium dioxide and aluminum oxide are widely used in surgery and dentistry due to the absence of cytotoxicity of the materials in relation to the surrounding cells of the body. However, little attention has been paid to the study of metabolic processes occurring at the implant-cell interface. The metabolic activity of mouse 3T3 fibroblasts incubated on yttrium-stabilized zirconium ceramics cured with aluminum oxide (ATZ) and stabilized zirconium ceramics (Y-TZP) was analyzed based on the ratio of the free/bound forms of cofactors NAD(P)H and FAD obtained using two-photon microscopy. The results show that fibroblasts incubated on ceramics demonstrate a shift towards the free form of NAD(P)H, which is observed during the glycolysis process, which, according to our assumptions, is related to the porosity of the surface of ceramic structures. Consequently, despite the high viability and good proliferation of fibroblasts assessed using an MTT test and a scanning electron microscope, the cells are in a state of hypoxia during incubation on ceramic structures. The FLIM results obtained in this work can be used as additional information for scientists who are interested in manufacturing osteoimplants.
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Affiliation(s)
- Tatiana B. Lepekhina
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia; (T.B.L.); (V.V.N.); (H.Z.); (M.S.S.); (E.I.S.); (Y.V.K.)
| | - Viktor V. Nikolaev
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia; (T.B.L.); (V.V.N.); (H.Z.); (M.S.S.); (E.I.S.); (Y.V.K.)
| | | | - Hala Zuhayri
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia; (T.B.L.); (V.V.N.); (H.Z.); (M.S.S.); (E.I.S.); (Y.V.K.)
| | - Mikhail S. Snegerev
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia; (T.B.L.); (V.V.N.); (H.Z.); (M.S.S.); (E.I.S.); (Y.V.K.)
| | - Aleksandr S. Lozhkomoev
- Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences (ISPMS SB RAS), 634021 Tomsk, Russia;
| | - Elena I. Senkina
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia; (T.B.L.); (V.V.N.); (H.Z.); (M.S.S.); (E.I.S.); (Y.V.K.)
- Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences (ISPMS SB RAS), 634021 Tomsk, Russia;
| | - Andrey P. Kokhanenko
- Department of Quantum Electronics and Photonics, Faculty of Radiophysics, National Research Tomsk State University, Lenin Av. 36, 634050 Tomsk, Russia;
| | - Kirill A. Lozovoy
- Department of Quantum Electronics and Photonics, Faculty of Radiophysics, National Research Tomsk State University, Lenin Av. 36, 634050 Tomsk, Russia;
| | - Yury V. Kistenev
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Lenin Ave. 36, 634050 Tomsk, Russia; (T.B.L.); (V.V.N.); (H.Z.); (M.S.S.); (E.I.S.); (Y.V.K.)
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32
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de la Puente M, Irigoyen-Bañegil C, Ortega Claici A, González-Zamora J, Bilbao-Malavé V, Fernandez-Robredo P, Hernández M, Barrio J, García-Layana A, Recalde S. Could Children's Myopization Have Been Avoided during the Pandemic Confinement? The Conjunctival Ultraviolet Autofluorescence (CUVAF) Biomarker as an Answer. Biomedicines 2024; 12:347. [PMID: 38397949 PMCID: PMC10886979 DOI: 10.3390/biomedicines12020347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 01/29/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND The objective of this study was to evaluate the association of the presence of conjunctival ultraviolet autofluorescence (CUVAF) with the level and progression of myopia and the impact of reduced sunlight exposure during the COVID-19 pandemic confinement (PC). METHODS A retrospective observational study was carried out using three cohorts, children (9-17 years old), young adults (18-25 years old), and adults (>40 years old) with myopia (≤0.75D) and at least three annual eye examinations (before and after PC). All participants underwent an automatic objective refraction and CUVAF area analysis. All the participants filled out a questionnaire regarding lifestyle and myopia history. RESULTS The 298 recruited participants showed that during the PC, children's and young adults' myopia progression rate increased on average by -0.50 and -0.30 D/year, respectively, compared with the pre-pandemic level (p < 0.0001 and p < 0.01). A significantly greater progression was observed in those with low baseline myopia compared to those with moderate or high myopia (p < 0.01). CUVAF shows its protective effect associated with outdoor activity (OA) with regard to the age of onset of myopia and mean diopters (p < 0.01). In fact, although there were no differences in the increase in diopters between children with and without CUVAF during the PC, those who had CUVAF started with lower gains (-0.3 D/year) compared to those who did not (-0.5 D/year; p < 0.05). The myopia treatments (atropine drops, Ortho-K, and MiSight® contact lenses) showed a reduction effect in myopic progression rate post-PC in comparison with non-treated children (p < 0.0001, p < 0.0001 and p < 0.01, respectively). CONCLUSIONS The strict restriction of OA during PC led to the rate of myopia progression doubling among children and young adults. This progression occurred mainly in children with previously low myopia, and CUVAF, as a biomarker of OA, reflects its potential to provide benefits in the form of recommended behavioral changes to protect against the development of myopia.
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Affiliation(s)
- Miriam de la Puente
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Clínica Universidad de Navarra, 31008 Pamplona, Spain;
- Navarra Institute for Health Research, IdiSNA, 31008 Pamplona, Spain
| | - Cristina Irigoyen-Bañegil
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Clínica Universidad de Navarra, 31008 Pamplona, Spain;
- Navarra Institute for Health Research, IdiSNA, 31008 Pamplona, Spain
| | - Aura Ortega Claici
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Faculty of Medicine, Universidad de Navarra, 31008 Pamplona, Spain
| | - Jorge González-Zamora
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Bellvitge University Hospital, 08907 Barcelona, Spain
| | - Valentina Bilbao-Malavé
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Bellvitge University Hospital, 08907 Barcelona, Spain
| | - Patricia Fernandez-Robredo
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Clínica Universidad de Navarra, 31008 Pamplona, Spain;
- Navarra Institute for Health Research, IdiSNA, 31008 Pamplona, Spain
| | - María Hernández
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Clínica Universidad de Navarra, 31008 Pamplona, Spain;
- Navarra Institute for Health Research, IdiSNA, 31008 Pamplona, Spain
| | - Jesús Barrio
- Department of Ophthalmology, Clínica Universidad de Navarra, 31008 Pamplona, Spain;
- Navarra Institute for Health Research, IdiSNA, 31008 Pamplona, Spain
| | - Alfredo García-Layana
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Clínica Universidad de Navarra, 31008 Pamplona, Spain;
- Navarra Institute for Health Research, IdiSNA, 31008 Pamplona, Spain
| | - Sergio Recalde
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, 31008 Pamplona, Spain; (M.d.l.P.); (C.I.-B.); (A.O.C.); (J.G.-Z.); (V.B.-M.); (P.F.-R.); (M.H.); (A.G.-L.)
- Department of Ophthalmology, Clínica Universidad de Navarra, 31008 Pamplona, Spain;
- Navarra Institute for Health Research, IdiSNA, 31008 Pamplona, Spain
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Yi Y, Li Y, Zhang S, Men Y, Wang Y, Jing D, Ding J, Zhu Q, Chen Z, Chen X, Li JL, Wang Y, Wang J, Peng H, Zhang L, Luo W, Feng JQ, He Y, Ge WP, Zhao H. Mapping of individual sensory nerve axons from digits to spinal cord with the transparent embedding solvent system. Cell Res 2024; 34:124-139. [PMID: 38168640 PMCID: PMC10837210 DOI: 10.1038/s41422-023-00867-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 08/07/2023] [Indexed: 01/05/2024] Open
Abstract
Achieving uniform optical resolution for a large tissue sample is a major challenge for deep imaging. For conventional tissue clearing methods, loss of resolution and quality in deep regions is inevitable due to limited transparency. Here we describe the Transparent Embedding Solvent System (TESOS) method, which combines tissue clearing, transparent embedding, sectioning and block-face imaging. We used TESOS to acquire volumetric images of uniform resolution for an adult mouse whole-body sample. The TESOS method is highly versatile and can be combined with different microscopy systems to achieve uniformly high resolution. With a light sheet microscope, we imaged the whole body of an adult mouse, including skin, at a uniform 0.8 × 0.8 × 3.5 μm3 voxel resolution within 120 h. With a confocal microscope and a 40×/1.3 numerical aperture objective, we achieved a uniform sub-micron resolution in the whole sample to reveal a complete projection of individual nerve axons within the central or peripheral nervous system. Furthermore, TESOS allowed the first mesoscale connectome mapping of individual sensory neuron axons spanning 5 cm from adult mouse digits to the spinal cord at a uniform sub-micron resolution.
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Affiliation(s)
- Yating Yi
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Chinese Institute for Brain Research, Beijing, China
| | - Youqi Li
- Chinese Institute for Brain Research, Beijing, China
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Shiwen Zhang
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yi Men
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yuhong Wang
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Dian Jing
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology, Shanghai, China
| | - Jiayi Ding
- Chinese Institute for Brain Research, Beijing, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Qingjie Zhu
- Chinese Institute for Brain Research, Beijing, China
| | - Zexi Chen
- Chinese Institute for Brain Research, Beijing, China
| | - Xingjun Chen
- Chinese Institute for Brain Research, Beijing, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Jun-Liszt Li
- Chinese Institute for Brain Research, Beijing, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Yilong Wang
- Chinese Institute for Brain Research, Beijing, China
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jun Wang
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Hanchuan Peng
- SEU-ALLEN Joint Center, Institute for Brain and Intelligence, Southeast University, Nanjing, Jiangsu, China
| | - Li Zhang
- Chinese Institute for Brain Research, Beijing, China
| | | | - Jian Q Feng
- Texas A&M University, College of Dentistry, Dallas, TX, USA
| | - Yongwen He
- Qujing Medical College, Qujing, Yunnan, China.
| | - Woo-Ping Ge
- Chinese Institute for Brain Research, Beijing, China.
| | - Hu Zhao
- Chinese Institute for Brain Research, Beijing, China.
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Schauenburg D, Weil T. Chemical Reactions in Living Systems. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2303396. [PMID: 37679060 PMCID: PMC10885656 DOI: 10.1002/advs.202303396] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/18/2023] [Indexed: 09/09/2023]
Abstract
The term "in vivo ("in the living") chemistry" refers to chemical reactions that take place in a complex living system such as cells, tissue, body liquids, or even in an entire organism. In contrast, reactions that occur generally outside living organisms in an artificial environment (e.g., in a test tube) are referred to as in vitro. Over the past decades, significant contributions have been made in this rapidly growing field of in vivo chemistry, but it is still not fully understood, which transformations proceed efficiently without the formation of by-products or how product formation in such complex environments can be characterized. Potential applications can be imagined that synthesize drug molecules directly within the cell or confer new cellular functions through controlled chemical transformations that will improve the understanding of living systems and develop new therapeutic strategies. The guiding principles of this contribution are twofold: 1) Which chemical reactions can be translated from the laboratory to the living system? 2) Which characterization methods are suitable for studying reactions and structure formation in complex living environments?
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Affiliation(s)
| | - Tanja Weil
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
- Institute of Inorganic Chemistry IUlm UniversityAlbert‐Einstein‐Allee 1189081UlmGermany
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Yang Y, Jiang Q, Zhang F. Nanocrystals for Deep-Tissue In Vivo Luminescence Imaging in the Near-Infrared Region. Chem Rev 2024; 124:554-628. [PMID: 37991799 DOI: 10.1021/acs.chemrev.3c00506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
In vivo imaging technologies have emerged as a powerful tool for both fundamental research and clinical practice. In particular, luminescence imaging in the tissue-transparent near-infrared (NIR, 700-1700 nm) region offers tremendous potential for visualizing biological architectures and pathophysiological events in living subjects with deep tissue penetration and high imaging contrast owing to the reduced light-tissue interactions of absorption, scattering, and autofluorescence. The distinctive quantum effects of nanocrystals have been harnessed to achieve exceptional photophysical properties, establishing them as a promising category of luminescent probes. In this comprehensive review, the interactions between light and biological tissues, as well as the advantages of NIR light for in vivo luminescence imaging, are initially elaborated. Subsequently, we focus on achieving deep tissue penetration and improved imaging contrast by optimizing the performance of nanocrystal fluorophores. The ingenious design strategies of NIR nanocrystal probes are discussed, along with their respective biomedical applications in versatile in vivo luminescence imaging modalities. Finally, thought-provoking reflections on the challenges and prospects for future clinical translation of nanocrystal-based in vivo luminescence imaging in the NIR region are wisely provided.
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Affiliation(s)
- Yang Yang
- College of Energy Materials and Chemistry, State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot 010021, China
| | - Qunying Jiang
- College of Energy Materials and Chemistry, State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot 010021, China
| | - Fan Zhang
- College of Energy Materials and Chemistry, State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot 010021, China
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
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Rodriguez NG, Claici AO, Ramos-Castaneda JA, González-Zamora J, Bilbao-Malavé V, de la Puente M, Fernandez-Robredo P, Garzón-Parra SJ, Garza-Leon M, Recalde S. Conjunctival ultraviolet autofluorescence as a biomarker of outdoor exposure in myopia: a systematic review and meta-analysis. Sci Rep 2024; 14:1097. [PMID: 38212604 PMCID: PMC10784576 DOI: 10.1038/s41598-024-51417-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024] Open
Abstract
Outdoor exposure is considered the primary modifiable risk factor in preventing the development of myopia. This effect is thought to be attributed to the light-induced synthesis and release of dopamine in the retina. However, until recent years, there was no objective quantifiable method available to measure the association between time spent outdoors and myopia. It is only recently that the conjunctival ultraviolet autofluorescence (CUVAF) area, serving as a biomarker for sun exposure, has begun to be utilized in numerous studies. To provide a comprehensive summary of the relevant evidence pertaining to the association between the CUVAF area and myopia across different geographic regions and age groups, a systematic review and meta-analysis were conducted. The search encompassed multiple databases, including MEDLINE, SCIENCE DIRECT, GOOGLE SCHOLAR, WEB OF SCIENCE, and SCOPUS, and utilized specific search terms such as "conjunctival ultraviolet autofluorescence", "CUVAF", "UVAF", "objective marker of ocular sun exposure", "myopia", "degenerative myopia", and "high myopia". The bibliographic research included papers published between the years 2006 and 2022. A total of 4051 records were initially identified, and after duplicates were removed, 49 articles underwent full-text review. Nine articles were included in the systematic review. These studies covered myopia and outdoor exposure across different regions (Australia, Europe and India) with a total population of 3615 individuals. They found that myopes generally had smaller CUVAF areas compared to non-myopes. The meta-analysis confirmed this, revealing statistically smaller CUVAF areas in myopic patients, with a mean difference of - 3.30 mm2 (95% CI - 5.53; - 1.06). Additionally, some studies showed a positive correlation between more outdoor exposure and larger CUVAF areas. In terms of outdoor exposure time, myopic patients reported less time outdoors than non-myopic individuals, with a mean difference of - 3.38 h/week (95% CI - 4.66; - 2.09). Overall, these findings highlight the connection between outdoor exposure, CUVAF area and myopia, with regional variations playing a significant role. The results of this meta-analysis validate CUVAF as a quantitative method to objectively measure outdoor exposure in relation with myopia development.
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Grants
- 01/0022-23 Doctoral fellowship funded by Miniciencias Bogotá, Colombia.
- PI20/00251 Instituto de Salud Carlos III through the project Co-funded by European Regional Development Fund "A way to make Europe"
- CUN 2019 Multiópticas
- (RD21/0017/0027) Redes de Investigación Cooperativa Orientadas al Resultado en Salud (RICORS) de Terapias avanzadas , Enfermedades Inflamatorias and Enfermedades vasculares cerebrales , Ministerio de Ciencia, Innovación y Universidades, Instituto de Salud Carlos III
- (RD21/0002/0010) Redes de Investigación Cooperativa Orientadas al Resultado en Salud (RICORS) de Terapias avanzadas , Enfermedades Inflamatorias and Enfermedades vasculares cerebrales , Ministerio de Ciencia, Innovación y Universidades, Instituto de Salud Carlos III
- (RD21/0006/0008) Redes de Investigación Cooperativa Orientadas al Resultado en Salud (RICORS) de Terapias avanzadas , Enfermedades Inflamatorias and Enfermedades vasculares cerebrales , Ministerio de Ciencia, Innovación y Universidades, Instituto de Salud Carlos III
- 01-20/21 Fundación Jesús Gangoiti Barrera
- Instituto de Salud Carlos III through the project Co-funded by European Regional Development Fund “A way to make Europe”
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Affiliation(s)
- Natali Gutierrez Rodriguez
- Grupo de Investigación en Optometría-Facultad de Optometría de la Universidad Antonio Nariño, Bogotá, Colombia
| | - Aura Ortega Claici
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, Pamplona, Spain
- Faculty of Medicine, Universidad de Navarra, Pamplona, Spain
| | - Jorge A Ramos-Castaneda
- Research Group Innovación y Cuidado, Faculty of Nursing, Universidad Antonio Nariño, Neiva, Colombia
| | - Jorge González-Zamora
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, Pamplona, Spain
- Department of Ophthalmology, Clínica Universidad de Navarra, Madrid, Spain
- Navarra Institute for Health Research, IdiSNA, Pamplona, Spain
| | - Valentina Bilbao-Malavé
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, Pamplona, Spain
- Department of Ophthalmology, Bellvitge University Hospital, Barcelona, Spain
| | - Miriam de la Puente
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, Pamplona, Spain
- Department of Ophthalmology, Clínica Universidad de Navarra, Madrid, Spain
- Navarra Institute for Health Research, IdiSNA, Pamplona, Spain
| | - Patricia Fernandez-Robredo
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, Pamplona, Spain
- Department of Ophthalmology, Clínica Universidad de Navarra, Madrid, Spain
- Navarra Institute for Health Research, IdiSNA, Pamplona, Spain
| | - Sandra Johanna Garzón-Parra
- Grupo de Investigación en Optometría-Facultad de Optometría de la Universidad Antonio Nariño, Bogotá, Colombia
| | - Manuel Garza-Leon
- Clinical Science Department, Science of Health Division, University of Monterrey, San Pedro Garza García, Nuevo León, México
| | - Sergio Recalde
- Retinal Pathologies and New Therapies Group, Experimental Ophthalmology Laboratory, Department of Ophthalmology, Clinica Universidad de Navarra, Pamplona, Spain.
- Department of Ophthalmology, Clínica Universidad de Navarra, Madrid, Spain.
- Navarra Institute for Health Research, IdiSNA, Pamplona, Spain.
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Dabaghi E, Berber E. An update on the use of near-infrared autofluorescence imaging in endocrine surgical procedures. J Surg Oncol 2024; 129:40-47. [PMID: 38031992 DOI: 10.1002/jso.27541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 12/01/2023]
Abstract
Over the past decade, near-infrared autofluorescence (NIRAF) imaging has been a major breakthrough in endocrine surgery. Although initial focus was directed at the parathyroid glands, subsequent work has also shown that non-parathyroid neuroendocrine tumors also possess autofluorescence properties. The aim of this review is to present an update and synopsis about NIRAF applications in various endocrine surgical procedures. Methodology includes a review of the literature supplemented with expert opinion. Overall, our review reveals that the use of NIRAF may provide the surgeon with adjunctive critical information that has the potential to change the conduct of many various endocrine surgical procedures.
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Affiliation(s)
- Elissa Dabaghi
- Department of Endocrine Surgery, Cleveland Clinic, Ohio, USA
| | - Eren Berber
- Department of Endocrine Surgery, Cleveland Clinic, Ohio, USA
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Tanskanen A, Malone J, MacAulay C, Lane P. Multipath artifacts enable angular contrast in multimodal endoscopic optical coherence tomography. OPTICS EXPRESS 2023; 31:44224-44245. [PMID: 38178499 DOI: 10.1364/oe.504854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 11/29/2023] [Indexed: 01/06/2024]
Abstract
Multipath artifacts are inherent to double-clad fiber based optical coherence tomography (OCT), appearing as ghost images blurred in the A-line direction. They result from the excitation of higher-order inner-cladding modes in the OCT sample arm which cross-couple into the fundamental mode at discontinuities and thus are detected in single-mode fiber-based interferometers. Historically, multipath artifacts have been regarded as a drawback in single fiber endoscopic multimodal OCT systems as they degrade OCT quality. In this work, we reveal that multipath artifacts can be projected into high-quality two-dimensional en face images which encode high angle backscattering features. Using a combination of experiment and simulation, we characterize the coupling of Mie-range scatterers into the fundamental image (LP01 mode) and higher-order image (multipath artifact). This is validated experimentally through imaging of microspheres with an endoscopic multimodal OCT system. The angular dependence of the fundamental image and higher order image generated by the multipath artifact lays the basis for multipath contrast, a ratiometric measurement of differential coupling which provides information regarding the angular diversity of a sample. Multipath contrast images can be generated from OCT data where multipath artifacts are present, meaning that a wealth of clinical data can be retrospectively examined.
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Shamsi E, Parvin P, Ahmadinouri F, Khazai S. Laser-induced fluorescence spectroscopy of plant-based drugs: Opium and hashish provoking at 405 nm. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 302:123055. [PMID: 37390713 DOI: 10.1016/j.saa.2023.123055] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 06/13/2023] [Accepted: 06/19/2023] [Indexed: 07/02/2023]
Abstract
Here, the fluorescence properties of some plant-based drug samples are characterized using a coherent excitation source at 405 nm. The laser-induced fluorescence (LIF) spectroscopy is examined to analyze opium and hashish. In order to improve traditional fluorescence methods for better analysis of optically dense materials, we have proposed five characteristic parameters based on solvent densitometry assay as the fingerprints of drugs of interest. The signal emissions are recorded in terms of various drug concentrations, such that the best fitting over experimental data determines the fluorescence extinction (α) and self-quenching (k) coefficients according to the modified Beer-Lambert formalism. The typical α value is determined to be 0.30 and 0.15 mL/(cm∙mg) for opium and hashish, respectively. Similarly, typical k is obtained 0.390 and 1.25 mL/(cm∙mg), respectively. Furthermore, the concentration at max fluorescence intensity (Cp) is determined for opium and hashish to be 1.8 and 1.3 mg/mL, respectively. Results reveal that opium and hashish benefit their own characteristic fluorescence parameters to discriminate those illicit substances promptly using the present method.
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Affiliation(s)
- Ehsan Shamsi
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - Parviz Parvin
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran.
| | - Fatemeh Ahmadinouri
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - Samaneh Khazai
- Physics Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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40
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Peng J, Liu Q, Pu T, Zhang M, Zhang M, Du M, Li G, Zhang X, Xu C. Targeted Imaging of Endometriosis and Image-Guided Resection of Lesions Using Gonadotropin-Releasing Hormone Analogue-Modified Indocyanine Green. Mol Imaging 2023; 2023:6674054. [PMID: 38089464 PMCID: PMC10713253 DOI: 10.1155/2023/6674054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 10/17/2023] [Accepted: 11/15/2023] [Indexed: 12/18/2023] Open
Abstract
Objective In this study, we utilized gonadotropin-releasing hormone analogue-modified indocyanine green (GnRHa-ICG) to improve the accuracy of intraoperative recognition and resection of endometriotic lesions. Methods Gonadotropin-releasing hormone receptor (GnRHR) expression was detected in endometriosis tissues and cell lines via immunohistochemistry and western blotting. The in vitro binding capacities of GnRHa, GnRHa-ICG, and ICG were determined using fluorescence microscopy and flow cytometry. In vivo imaging was performed in mouse models of endometriosis using a near-infrared fluorescence (NIRF) imaging system and fluorescence navigation system. The ex vivo binding capacity was determined using confocal fluorescence microscopy. Results GnRHa-ICG exhibited a significantly stronger binding capacity to endometriotic cells and tissues than ICG. In mice with endometriosis, GnRHa-ICG specifically imaged endometriotic tissues (EMTs) after intraperitoneal administration, whereas ICG exhibited signals in the intestine. GnRHa-ICG showed the highest fluorescence signals in the EMTs at 2 h and a good signal-to-noise ratio at 48 h postadministration. Compared with traditional surgery under white light, targeted NIRF imaging-guided surgery completely resected endometriotic lesions with a sensitivity of 97.3% and specificity of 77.8%. No obvious toxicity was observed in routine blood tests, serum biochemicals, or histopathology in mice. Conclusions GnRHa-ICG specifically recognized and localized endometriotic lesions and guided complete resection of lesions with high accuracy.
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Affiliation(s)
- Jing Peng
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Qiyu Liu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Tao Pu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Mingxing Zhang
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Meng Zhang
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Ming Du
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Guiling Li
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
| | - Xiaoyan Zhang
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Congjian Xu
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai 200032, China
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Kulahava T, Belko N, Parkhats M, Bahdanava A, Lepeshkevich S, Chizhevsky V, Mogilevtsev D. Photostability and phototoxicity of graphene quantum dots interacting with red blood cells. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 248:112800. [PMID: 37857078 DOI: 10.1016/j.jphotobiol.2023.112800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/27/2023] [Accepted: 10/09/2023] [Indexed: 10/21/2023]
Abstract
Here we discuss fluorescent properties of graphene quantum dots (GQDs) interacting with the membranes of red blood cells. We report the results of spectroscopic, microscopic, and photon-counting measurements of the GQDs in different surroundings for uncovering specific features of the GQD fluorescence, and describe two observed phenomena important for implementation of the GQDs as fluorescent labels and agents for drug delivery. Firstly, the GQDs can suffer from photodegradation but also can be stabilized in the presence of antioxidants (reduced glutathione, N-acetylcysteine, or 1,4-hydroquinone). Secondly, GQDs can accumulate in red blood cell membranes without compromising the viability of the cells but also can induce hemolysis in the presence of visible light. We discuss mechanisms and regimes of the photodegradation, stabilization, interaction of the GQDs with red blood cell membranes, and hemolysis. Notably, photohemolysis for the case is dependent on the light dose and GQD concentration but not caused by the production of reactive oxygen species.
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Affiliation(s)
- Tatsiana Kulahava
- Institute for Nuclear Problems of the Belarusian State University, Bobruiskaya str. 11, Minsk 220006, Belarus
| | - Nikita Belko
- B.I. Stepanov Institute of Physics, NAS of Belarus, Nezavisimosty ave. 68, Minsk 220072, Belarus.
| | - Marina Parkhats
- B.I. Stepanov Institute of Physics, NAS of Belarus, Nezavisimosty ave. 68, Minsk 220072, Belarus
| | - Anastasiya Bahdanava
- Institute for Nuclear Problems of the Belarusian State University, Bobruiskaya str. 11, Minsk 220006, Belarus
| | - Sergei Lepeshkevich
- B.I. Stepanov Institute of Physics, NAS of Belarus, Nezavisimosty ave. 68, Minsk 220072, Belarus
| | - Vyacheslav Chizhevsky
- B.I. Stepanov Institute of Physics, NAS of Belarus, Nezavisimosty ave. 68, Minsk 220072, Belarus
| | - Dmitri Mogilevtsev
- B.I. Stepanov Institute of Physics, NAS of Belarus, Nezavisimosty ave. 68, Minsk 220072, Belarus.
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42
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Xi G, Huang C, Lin J, Luo T, Kang B, Xu M, Xu H, Li X, Chen J, Qiu L, Zhuo S. Rapid label-free detection of early-stage lung adenocarcinoma and tumor boundary via multiphoton microscopy. JOURNAL OF BIOPHOTONICS 2023; 16:e202300172. [PMID: 37596245 DOI: 10.1002/jbio.202300172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/08/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
Lung cancer is the most commonly diagnosed cancer and the leading cause of cancer-related deaths in China. Rapid and precise evaluation of tumor tissue during lung cancer surgery can reduce operative time and improve negative-margin assessment, thus increasing disease-free and overall survival rates. This study aimed to explore the potential of label-free multiphoton microscopy (MPM) for imaging adenocarcinoma tissues, detecting histopathological features, and distinguishing between normal and cancerous lung tissues. We showed that second harmonic generation (SHG) signals exhibit significant specificity for collagen fibers, enabling the quantification of collagen features in lung adenocarcinomas. In addition, we developed a collagen score that could be used to distinguish between normal and tumor areas at the tumor boundary, showing good classification performance. Our findings demonstrate that MPM imaging technology combined with an image-based collagen feature extraction method can rapidly and accurately detect early-stage lung adenocarcinoma tissues.
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Affiliation(s)
- Gangqin Xi
- School of Science, Jimei University, Xiamen, China
| | - Chen Huang
- Shengli Clinical College of Fujian Medical University, Department of Thoracic Surgery, Fujian Provincial Hospital, Fuzhou, China
| | - Jie Lin
- Shengli Clinical College of Fujian Medical University, Department of Pathology, Fujian Provincial Hospital, Fuzhou, China
| | - Tianyi Luo
- School of Science, Jimei University, Xiamen, China
| | - Bingzi Kang
- School of Science, Jimei University, Xiamen, China
| | - Mingyu Xu
- School of Science, Jimei University, Xiamen, China
| | - Huizhen Xu
- School of Science, Jimei University, Xiamen, China
| | - Xiaolu Li
- School of Science, Jimei University, Xiamen, China
| | - Jianxin Chen
- Key Laboratory of OptoElectronic Science and Technology for Medicine of the Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou, China
| | - Lida Qiu
- College of Physics and Electronic Information Engineering, Minjiang University, Fuzhou, China
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43
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Rummel AD, Sierra MM, Quinn BL, Swartz SM. Hair, there and everywhere: A comparison of bat wing sensory hair distribution. Anat Rec (Hoboken) 2023; 306:2681-2692. [PMID: 36790015 DOI: 10.1002/ar.25176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/17/2023] [Accepted: 01/27/2023] [Indexed: 02/16/2023]
Abstract
Bat wing membranes are composed of specialized skin that is covered with small sensory hairs which are likely mechanosensory and have been suggested to help bats sense airflow during flight. These sensory hairs have to date been studied in only a few of the more than 1,400 bat species around the world. Little is known about the diversity of the sensory hair network across the bat phylogeny. In this study, we use high-resolution photomicrographs of preserved bat wings from 17 species in 12 families to characterize the distribution of sensory hairs along the wing and among species. We identify general patterns of sensory hair distribution across species, including the apparent relationships of sensory hairs to intramembranous wing muscles, the network of connective tissues in the wing membrane, and the bones of the forelimb. We also describe distinctive clustering of these sensory structures in some species. We also quantified sensory hair density in several regions of interest in the propatagium, plagiopatagium, and dactylopagatia, finding that sensory hair density was higher proximally than distally. This examination of the anatomical organization of the sensory hair network in a comparative context provides a framework for existing research on sensory hair function and highlights avenues for further research.
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Affiliation(s)
- Andrea D Rummel
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, Rhode Island, USA
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA
| | - Melissa M Sierra
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, Rhode Island, USA
| | - Brooke L Quinn
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, Rhode Island, USA
| | - Sharon M Swartz
- Department of Ecology, Evolution, and Organismal Biology, Brown University, Providence, Rhode Island, USA
- School of Engineering, Brown University, Providence, Rhode Island, USA
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44
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Brentjens ET, Beall EAK, Zucker RM. Analysis of Microcystis aeruginosa physiology by spectral flow cytometry: Impact of chemical and light exposure. PLOS WATER 2023; 2:1-30. [PMID: 38516272 PMCID: PMC10953801 DOI: 10.1371/journal.pwat.0000177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
M. aeruginosa fluorescent changes were observed using a Cytek Aurora spectral flow cytometer that contains 5 lasers and 64 narrow band detectors located between 365 and 829 nm. Cyanobacteria were treated with different concentrations of H2O2 and then monitored after exposure between 1 and 8 days. The red fluorescence emission derived from the excitation of cyanobacteria with a yellow green laser (550 nm) was measured in the 652-669 nm detector while green fluorescence from excitation with a violet laser (405 nm) was measured in the 532-550 nm detector. The changes in these parameters were measured after the addition of H2O2. There was an initial increase in red fluorescence intensity at 24 hours. This was followed by a daily decrease in red fluorescence intensity. In contrast, green fluorescence increased at 24 hours and remained higher than the control for the duration of the 8-day study. A similar fluorescence intensity effect as H2O2 on M. aeruginosa fluorescence emissions was observed after exposure to acetylacetone, diuron (DCMU), peracetic acid, and tryptoline. Minimal growth was also observed in H2O2 treated cyanobacteria during exposure of H2O2 for 24 days. In another experiment, H2O2-treated cyanobacteria were exposed to high-intensity blue (14 mW) and UV (1 mW) lights to assess the effects of light stress on fluorescence emissions. The combination of blue and UV light with H2O2 had a synergistic effect on M. aeruginosa that induced greater fluorescent differences between control and treated samples than exposure to either stimulus individually. These experiments suggest that the early increase in red and green fluorescence may be due to an inhibition in the ability of photosynthesis to process photons. Further research into the mechanisms driving these increases in fluorescence is necessary.
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Affiliation(s)
- Emma T. Brentjens
- Oak Ridge Institute for Science and Education Research Participation Program hosted by U.S. Environmental Protection Agency, Oak Ridge, TN, United States of America
| | - Elizabeth A. K. Beall
- Oak Ridge Institute for Science and Education Research Participation Program hosted by U.S. Environmental Protection Agency, Oak Ridge, TN, United States of America
| | - Robert M. Zucker
- Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Office of Research and Development, RTP, NC, United States of America
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45
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Matsuda K, Han X, Matsuda N, Yamanaka M, Suzuki I. Development of an In Vitro Assessment Method for Chemotherapy-Induced Peripheral Neuropathy (CIPN) by Integrating a Microphysiological System (MPS) with Morphological Deep Learning of Soma and Axonal Images. TOXICS 2023; 11:848. [PMID: 37888698 PMCID: PMC10611258 DOI: 10.3390/toxics11100848] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/07/2023] [Accepted: 10/08/2023] [Indexed: 10/28/2023]
Abstract
Several anticancer drugs used in cancer therapy induce chemotherapy-induced peripheral neuropathy (CIPN), leading to dose reduction or therapy cessation. Consequently, there is a demand for an in vitro assessment method to predict CIPN and mechanisms of action (MoA) in drug candidate compounds. In this study, a method assessing the toxic effects of anticancer drugs on soma and axons using deep learning image analysis is developed, culturing primary rat dorsal root ganglion neurons with a microphysiological system (MPS) that separates soma from neural processes and training two artificial intelligence (AI) models on soma and axonal area images. Exposing the control compound DMSO, negative compound sucrose, and known CIPN-causing drugs (paclitaxel, vincristine, oxaliplatin, suramin, bortezomib) for 24 h, results show the somatic area-learning AI detected significant cytotoxicity for paclitaxel (* p < 0.05) and oxaliplatin (* p < 0.05). In addition, axonal area-learning AI detected significant axonopathy with paclitaxel (* p < 0.05) and vincristine (* p < 0.05). Combining these models, we detected significant toxicity in all CIPN-causing drugs (** p < 0.01) and could classify anticancer drugs based on their different MoA on neurons, suggesting that the combination of MPS-based culture segregating soma and axonal areas and AI image analysis of each area provides an effective evaluation method to predict CIPN from low concentrations and infer the MoA.
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Affiliation(s)
- Kazuki Matsuda
- Department of Electronics, Graduate School of Engineering, Tohoku Institute of Technology, 35-1 Yagiyama Kasumicho, Taihaku-ku, Sendai 982-8577, Japan; (K.M.); (X.H.); (N.M.)
| | - Xiaobo Han
- Department of Electronics, Graduate School of Engineering, Tohoku Institute of Technology, 35-1 Yagiyama Kasumicho, Taihaku-ku, Sendai 982-8577, Japan; (K.M.); (X.H.); (N.M.)
| | - Naoki Matsuda
- Department of Electronics, Graduate School of Engineering, Tohoku Institute of Technology, 35-1 Yagiyama Kasumicho, Taihaku-ku, Sendai 982-8577, Japan; (K.M.); (X.H.); (N.M.)
| | - Makoto Yamanaka
- Business Creation Division Organs on Chip Project, Usio Inc., 1-6-5 Marunouchi, Chiyoda-ku, Tokyo 100-8150, Japan;
| | - Ikuro Suzuki
- Department of Electronics, Graduate School of Engineering, Tohoku Institute of Technology, 35-1 Yagiyama Kasumicho, Taihaku-ku, Sendai 982-8577, Japan; (K.M.); (X.H.); (N.M.)
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46
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Barroso M, Monaghan MG, Niesner R, Dmitriev RI. Probing organoid metabolism using fluorescence lifetime imaging microscopy (FLIM): The next frontier of drug discovery and disease understanding. Adv Drug Deliv Rev 2023; 201:115081. [PMID: 37647987 PMCID: PMC10543546 DOI: 10.1016/j.addr.2023.115081] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/20/2023] [Accepted: 08/24/2023] [Indexed: 09/01/2023]
Abstract
Organoid models have been used to address important questions in developmental and cancer biology, tissue repair, advanced modelling of disease and therapies, among other bioengineering applications. Such 3D microenvironmental models can investigate the regulation of cell metabolism, and provide key insights into the mechanisms at the basis of cell growth, differentiation, communication, interactions with the environment and cell death. Their accessibility and complexity, based on 3D spatial and temporal heterogeneity, make organoids suitable for the application of novel, dynamic imaging microscopy methods, such as fluorescence lifetime imaging microscopy (FLIM) and related decay time-assessing readouts. Several biomarkers and assays have been proposed to study cell metabolism by FLIM in various organoid models. Herein, we present an expert-opinion discussion on the principles of FLIM and PLIM, instrumentation and data collection and analysis protocols, and general and emerging biosensor-based approaches, to highlight the pioneering work being performed in this field.
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Affiliation(s)
- Margarida Barroso
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY 12208, USA
| | - Michael G Monaghan
- Department of Mechanical, Manufacturing and Biomedical Engineering, Trinity College Dublin, Dublin 02, Ireland
| | - Raluca Niesner
- Dynamic and Functional In Vivo Imaging, Freie Universität Berlin and Biophysical Analytics, German Rheumatism Research Center, Berlin, Germany
| | - Ruslan I Dmitriev
- Tissue Engineering and Biomaterials Group, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, C. Heymanslaan 10, 9000 Ghent, Belgium; Ghent Light Microscopy Core, Ghent University, 9000 Ghent, Belgium.
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47
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Nakashiba T, Ogoh K, Iwano S, Sugiyama T, Mizuno-Iijima S, Nakashima K, Mizuno S, Sugiyama F, Yoshiki A, Miyawaki A, Abe K. Development of two mouse strains conditionally expressing bright luciferases with distinct emission spectra as new tools for in vivo imaging. Lab Anim (NY) 2023; 52:247-257. [PMID: 37679611 PMCID: PMC10533401 DOI: 10.1038/s41684-023-01238-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 08/01/2023] [Indexed: 09/09/2023]
Abstract
In vivo bioluminescence imaging (BLI) has been an invaluable noninvasive method to visualize molecular and cellular behaviors in laboratory animals. Bioluminescent reporter mice harboring luciferases for general use have been limited to a classical luciferase, Luc2, from Photinus pyralis, and have been extremely powerful for various in vivo studies. However, applicability of reporter mice for in vivo BLI could be further accelerated by increasing light intensity through the use of other luciferases and/or by improving the biodistribution of their substrates in the animal body. Here we created two Cre-dependent reporter mice incorporating luciferases oFluc derived from Pyrocoeli matsumurai and Akaluc, both of which had been reported previously to be brighter than Luc2 when using appropriate substrates; we then tested their bioluminescence in neural tissues and other organs in living mice. When expressed throughout the body, both luciferases emitted an intense yellow (oFluc) or far-red (Akaluc) light easily visible to the naked eye. oFluc and Akaluc were similarly bright in the pancreas for in vivo BLI; however, Akaluc was superior to oFluc for brain imaging, because its substrate, AkaLumine-HCl, was distributed to the brain more efficiently than the oFluc substrate, D-luciferin. We also demonstrated that the lights produced by oFluc and Akaluc were sufficiently spectrally distinct from each other for dual-color imaging in a single living mouse. Taken together, these novel bioluminescent reporter mice are an ideal source of cells with bright bioluminescence and may facilitate in vivo BLI of various tissues/organs for preclinical and biomedical research in combination with a wide variety of Cre-driver mice.
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Affiliation(s)
- Toshiaki Nakashiba
- Experimental Animal Division, RIKEN BioResource Research Center, Tsukuba, Japan.
| | - Katsunori Ogoh
- Corporate Research and Development Center, Olympus Corporation, Hachioji, Japan
| | - Satoshi Iwano
- Laboratory for Cell Function and Dynamics, RIKEN Center for Brain Science, Wako, Japan
- Institute for Tenure Track Promotion, University of Miyazaki, Miyazaki, Japan
| | - Takashi Sugiyama
- Corporate Research and Development Center, Olympus Corporation, Hachioji, Japan
- R&D Division, Evident Corporation, Hachioji, Japan
| | - Saori Mizuno-Iijima
- Experimental Animal Division, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Kenichi Nakashima
- Gene Engineering Division, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Seiya Mizuno
- Laboratory Animal Resource Center in Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Fumihiro Sugiyama
- Laboratory Animal Resource Center in Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Atsushi Yoshiki
- Experimental Animal Division, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Atsushi Miyawaki
- Laboratory for Cell Function and Dynamics, RIKEN Center for Brain Science, Wako, Japan
| | - Kuniya Abe
- Technology and Development Team for Mammalian Genome Dynamics, RIKEN BioResource Research Center, Tsukuba, Japan
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48
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Koepple C, Pollmann L, Pollmann NS, Schulte M, Kneser U, Gretz N, Schmidt VJ. Microporous Polylactic Acid Scaffolds Enable Fluorescence-Based Perfusion Imaging of Intrinsic In Vivo Vascularization. Int J Mol Sci 2023; 24:14813. [PMID: 37834261 PMCID: PMC10573679 DOI: 10.3390/ijms241914813] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/29/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
In vivo tissue engineering (TE) techniques like the AV loop model provide an isolated and well-defined microenvironment to study angiogenesis-related cell interactions. Functional visualization of the microvascular network within these artificial tissue constructs is crucial for the fundamental understanding of vessel network formation and to identify the underlying key regulatory mechanisms. To facilitate microvascular tracking advanced fluorescence imaging techniques are required. We studied the suitability of microporous polylactic acid (PLA) scaffolds with known low autofluorescence to form axial vascularized tissue constructs in the AV loop model and to validate these scaffolds for fluorescence-based perfusion imaging. Compared to commonly used collagen elastin (CE) scaffolds, the total number of vessels and cells in PLA scaffolds was lower. In detail, CE-based constructs exhibited significantly higher vessel numbers on day 14 and 28 (d14: 316 ± 53; d28: 610 ± 74) compared to the respective time points in PLA-based constructs (d14: 144 ± 18; d28: 327 ± 34; each p < 0.05). Analogously, cell counts in CE scaffolds were higher compared to corresponding PLA constructs (d14: 7661.25 ± 505.93 and 5804.04 ± 716.59; d28: 11211.75 + 1278.97 and 6045.71 ± 572.72, p < 0.05). CE scaffolds showed significantly higher vessel densities in proximity to the main vessel axis compared to PLA scaffolds (200-400 µm and 600-800 µm on day 14; 400-1000 µm and 1400-1600 µm on day 28). CE scaffolds had significantly higher cell counts on day 14 at distances from 800 to 2000 µm and at distances from 400 to 1600 µm on day 28. While the total number of vessels and cells in PLA scaffolds were lower, both scaffold types were ideally suited for axial vascularization techniques. The intravascular perfusion of PLA-based constructs with fluorescence dye MHI148-PEI demonstrated dye specificity against vascular walls of low- and high-order branches as well as capillaries and facilitated the fluorescence-based visualization of microcirculatory networks. Fluorophore tracking may contribute to the development of automated quantification methods after 3D reconstruction and image segmentation. These technologies may facilitate the characterization of key regulators within specific subdomains and add to the current understanding of vessel formation in axially vascularized tissue constructs.
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Affiliation(s)
- Christoph Koepple
- Department for Hand-, Plastic- and Reconstructive Surgery, BG Trauma Center Ludwigshafen, Heidelberg University, 67071 Ludwigshafen, Germany; (L.P.); (N.S.P.); (M.S.); (U.K.)
| | - Lukas Pollmann
- Department for Hand-, Plastic- and Reconstructive Surgery, BG Trauma Center Ludwigshafen, Heidelberg University, 67071 Ludwigshafen, Germany; (L.P.); (N.S.P.); (M.S.); (U.K.)
| | - Nicola Sariye Pollmann
- Department for Hand-, Plastic- and Reconstructive Surgery, BG Trauma Center Ludwigshafen, Heidelberg University, 67071 Ludwigshafen, Germany; (L.P.); (N.S.P.); (M.S.); (U.K.)
| | - Matthias Schulte
- Department for Hand-, Plastic- and Reconstructive Surgery, BG Trauma Center Ludwigshafen, Heidelberg University, 67071 Ludwigshafen, Germany; (L.P.); (N.S.P.); (M.S.); (U.K.)
| | - Ulrich Kneser
- Department for Hand-, Plastic- and Reconstructive Surgery, BG Trauma Center Ludwigshafen, Heidelberg University, 67071 Ludwigshafen, Germany; (L.P.); (N.S.P.); (M.S.); (U.K.)
| | - Norbert Gretz
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany;
| | - Volker J. Schmidt
- Department of Plastic Surgery and Hand Surgery, Kantonsspital St. Gallen, 9007 St. Gallen, Switzerland;
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49
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Rodriguez-Rios M, Rinaldi G, Megia-Fernandez A, Lilienkampf A, Robb CT, Rossi AG, Bradley M. Moving into the red - a near infra-red optical probe for analysis of human neutrophil elastase in activated neutrophils and neutrophil extracellular traps. Chem Commun (Camb) 2023; 59:11660-11663. [PMID: 37695093 DOI: 10.1039/d3cc03634k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Neutrophils are the first immune cells recruited for defence against invading pathogens; however, their dysregulated activation and subsequent release of the enzyme human neutrophil elastase is associated with several, inflammation-based, diseases. Herein, we describe a FRET-based, tri-branched (one quencher, three fluorophores) near infrared probe that provides an intense OFF/ON amplified fluorescence signal for specific detection of human neutrophil elastase. The probe allowed selective detection of activated neutrophils and labelling of neutrophil extracellular traps.
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Affiliation(s)
- M Rodriguez-Rios
- EaStCHEM School of Chemistry, University of Edinburgh, David Brewster Road, EH9 3FJ Edinburgh, UK
| | - G Rinaldi
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh BioQuarter, Edinburgh EH16 4TJ, UK
| | - A Megia-Fernandez
- EaStCHEM School of Chemistry, University of Edinburgh, David Brewster Road, EH9 3FJ Edinburgh, UK
- Organic Chemistry Department, Faculty of Sciences, University of Granada, Avda. Fuente Nueva S/N, 18071, Spain
| | - A Lilienkampf
- EaStCHEM School of Chemistry, University of Edinburgh, David Brewster Road, EH9 3FJ Edinburgh, UK
| | - C T Robb
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh BioQuarter, Edinburgh EH16 4TJ, UK
| | - A G Rossi
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh BioQuarter, Edinburgh EH16 4TJ, UK
| | - M Bradley
- Precision Healthcare University Research Institute, Queen Mary University of London, Empire House, 67-75 New Road, London E1 1HH, UK.
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50
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Garcia-Millan T, Ramos-Soriano J, Ghirardello M, Liu X, Santi CM, Eloi JC, Pridmore N, Harniman RL, Morgan DJ, Hughes S, Davis SA, Oliver TAA, Kurian KM, Galan MC. Multicolor Photoluminescent Carbon Dots à La Carte for Biomedical Applications. ACS APPLIED MATERIALS & INTERFACES 2023; 15:44711-44721. [PMID: 37715711 PMCID: PMC10540137 DOI: 10.1021/acsami.3c08200] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 09/01/2023] [Indexed: 09/18/2023]
Abstract
Dual-emission fluorescence probes that provide high sensitivity are key for biomedical diagnostic applications. Nontoxic carbon dots (CDs) are an emerging alternative to traditional fluorescent probes; however, robust and reproducible synthetic strategies are still needed to access materials with controlled emission profiles and improved fluorescence quantum yields (FQYs). Herein, we report a practical and general synthetic strategy to access dual-emission CDs with FQYs as high as 0.67 and green/blue, yellow/blue, or red/blue excitation-dependent emission profiles using common starting materials such as citric acid, cysteine, and co-dopants to bias the synthetic pathway. Structural and physicochemical analysis using nuclear magnetic resonance, absorbance and fluorescence spectroscopy, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy in addition to transmission electron and atomic force microscopy (TEM and AFM) is used to elucidate the material's composition which is responsible for the unique observed photoluminescence properties. Moreover, the utility of the probes is demonstrated in the clinical setting by the synthesis of green/blue emitting antibody-CD conjugates which are used for the immunohistochemical staining of human brain tissues of glioblastoma patients, showing detection under two different emission channels.
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Affiliation(s)
| | - Javier Ramos-Soriano
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Mattia Ghirardello
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Xia Liu
- Bristol
Medical School, Public Health Sciences, Southmead Hospital, University of Bristol, Southmead Road, Bristol BS8 NB, U.K.
| | | | - Jean-Charles Eloi
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Natalie Pridmore
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Robert L. Harniman
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - David J. Morgan
- Cardiff
Catalysis Institute, Cardiff University, Park Place, Cardiff CF10 3AT, U.K.
- HarwellXPS—The
EPSRC National Facility for Photoelectron, Spectroscopy, Research Complex at Harwell (RCaH), Didcot OX11 0FA, U.K.
| | - Stephen Hughes
- DST
Innovations Ltd, Unit
6a Bridgend Business Centre, Bennett Street, Bridgend CF31 3SH, U.K.
| | - Sean A. Davis
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Thomas A. A. Oliver
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Kathreena M. Kurian
- Bristol
Medical School, Public Health Sciences, Southmead Hospital, University of Bristol, Southmead Road, Bristol BS8 NB, U.K.
| | - M. Carmen Galan
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
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