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Ignatieva N, Zakharkina O, Kurkov A, Molchanov M, Mazayshvili K. Analysis of the vein wall destruction under endovenous laser ablation in an ex vivo model. J COSMET LASER THER 2022; 23:163-169. [DOI: 10.1080/14764172.2021.1990961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Natalia Ignatieva
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Olga Zakharkina
- Institute of Photon Technologies, Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Moscow, Russia
| | - Alexander Kurkov
- Institute for Regenerative Medicine, I. M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Maxim Molchanov
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russia
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Xu M, Liu J, Sun J, Xu X, Hu Y, Liu B. Optical Microscopy and Electron Microscopy for the Morphological Evaluation of Tendons: A Mini Review. Orthop Surg 2020; 12:366-371. [PMID: 32096911 PMCID: PMC7189050 DOI: 10.1111/os.12637] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 12/17/2022] Open
Abstract
The morphological characteristics of tendons have been thoroughly evaluated via microscopy. Optical microscopy and electron microscopy are the most commonly used techniques for tendon tissue observation. According to the principles of both microscopy types, preparation and evaluation methods vary. Simple optical microscopy is commonly used in the observation of cells and extracellular matrix, and many stains, including hematoxylin–eosin, Van Gieson, Prussian blue, Alcian blue, and toluidine blue, are used for evaluating cells, collagen fiber arrangement, and noncollagenous proteins. Histological scoring systems have been used in many studies for semi‐quantification. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are the most commonly used electron microscopy types, and special consideration is needed for the fixation and embedding protocols. Glutaraldehyde followed by osmium is most commonly used in the chemical fixation of tendon tissue, followed by epoxy resin embedment. Longitudinal sections captured in SEM images show the arrangement of collagen fibrils and the cells and lipid drops among them, while cross sections captured in TEM images show the diameter and distribution of collagen fibrils. SEM and TEM are used together for comprehensive evaluations. This mini review is focused on the preparation methodology and related evaluation indexes for the morphological evaluation of tendons.
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Affiliation(s)
- Mingyou Xu
- Graduate School, Tianjin Medical University, Tianjin, China.,Department of Orthopedic Oncology, Tianjin Hospital, Tianjin, China
| | - Jie Liu
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Jiayi Sun
- Center for Medical Device Evaluation NMPA, Beijing, China
| | - Xinrong Xu
- Analytical and Testing Center, South China University of Technology, Guangzhou, China
| | - Yongcheng Hu
- Department of Orthopedic Oncology, Tianjin Hospital, Tianjin, China
| | - Bin Liu
- Center for Medical Device Evaluation NMPA, Beijing, China
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Ignatieva N, Zakharkina O, Dadasheva A, Shekhter A, Sviridov A, Lunin V. Transformation of the dermal collagen framework under laser heating. JOURNAL OF BIOPHOTONICS 2019; 12:e201960024. [PMID: 31454461 DOI: 10.1002/jbio.201960024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 08/10/2019] [Accepted: 08/25/2019] [Indexed: 06/10/2023]
Abstract
The aim of this study was to compare between the changes undergone by the dermal collagen framework when heated by IR laser radiation and by traditional means and to reveal the specific features of the dermal matrix modification under moderate IR laser irradiation. Rabbit skin specimens were heated to 50°C, 55°C, 60°C and 65°C in a calorimeter furnace and with a 1.68-μm fiber Raman laser. The proportion of the degraded collagen macromolecules was determined by differential scanning calorimetry. Changes in the architectonics of the collagen framework were revealed by using standard, phase-contrast, polarization optical and scanning electron microscopy techniques. The collagen denaturation and dermal matrix amorphization temperature in the case of laser heating proved to be lower by 10°C than that for heating in the calorimeter furnace. The IR laser treatment of the skin was found to cause a specific low-temperature (45°C-50°C) transformation of its collagen framework, with some collagen macromolecules remaining intact. The transformation reduces to the splitting of collagen bundles and distortion of the course of collagen fibers. The denaturation of collagen macromolecules in the case of traditional heating takes its course in a threshold manner, so that their pre-denaturation morphological changes are insignificant.
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Affiliation(s)
| | - Olga Zakharkina
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russian Federation
| | - Aygun Dadasheva
- Department of Chemistry, Lomonosov Moscow State University, Baku Branch, Baku, Azerbaijan
| | - Anatoly Shekhter
- Institute for Regenerative Medicine, I M Sechenov First Moscow State Medical University, Moscow, Russian Federation
| | - Alexander Sviridov
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russian Federation
| | - Valery Lunin
- Lomonosov Moscow State University, Moskva, Russian Federation
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Lee W, Rahman H, Kersh ME, Toussaint KC. Application of quantitative second-harmonic generation microscopy to posterior cruciate ligament for crimp analysis studies. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:46009. [PMID: 28451692 DOI: 10.1117/1.jbo.22.4.046009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 04/11/2017] [Indexed: 05/03/2023]
Abstract
We use second-harmonic generation (SHG) microscopy to quantitatively characterize collagen fiber crimping in the posterior cruciate ligament (PCL). The obtained SHG images are utilized to define three distinct categories of crimp organization in the PCL. Using our previously published spatial-frequency analysis, we develop a simple algorithm to quantitatively distinguish the various crimp patterns. In addition, SHG microscopy reveals both the three-dimensional structural variation in some PCL crimp patterns as well as an underlying helicity in these patterns that have mainly been observed using electron microscopy. Our work highlights how SHG microscopy could potentially be used to link the fibrous structural information in the PCL to its mechanical properties.
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Affiliation(s)
- Woowon Lee
- University of Illinois at Urbana-Champaign, Department of Mechanical Science and Engineering, Urbana, Illinois, United StatesbUniversity of Illinois at Urbana-Champaign, PROBE Lab, Urbana, Illinois, United States
| | - Hafizur Rahman
- University of Illinois at Urbana-Champaign, Department of Mechanical Science and Engineering, Urbana, Illinois, United States
| | - Mariana E Kersh
- University of Illinois at Urbana-Champaign, Department of Mechanical Science and Engineering, Urbana, Illinois, United States
| | - Kimani C Toussaint
- University of Illinois at Urbana-Champaign, Department of Mechanical Science and Engineering, Urbana, Illinois, United StatesbUniversity of Illinois at Urbana-Champaign, PROBE Lab, Urbana, Illinois, United StatescUniversity of Illinois at Urbana-Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United StatesdUniversity of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois, United States
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Shekhter AB, Guller AE, Istranov LP, Istranova EV, Butnaru DV, Vinarov AZ, Zakharkina OL, Kurkov AV, Kantimerov DF, Antonov EN, Marisov LV, Glybochko PV. [Morphology of collagen matrices for tissue engineering (biocompatibility, biodegradation, tissue response)]. Arkh Patol 2016; 77:29-38. [PMID: 26841647 DOI: 10.17116/patol201577629-38] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE to perform a comparative morphological study of biocompatibility, biodegradation, and tissue response to implantation of collagen matrices (scaffolds) for tissue engineering in urology and other areas of medicine. MATERIAL AND METHODS Nine matrix types, such as porous materials reconstructed from collagen solution; a collagen sponge-vicryl mesh composite; decellularized and freeze-dried bovine, equine, and fish dermis; small intestinal submucosa, decellularized bovine dura mater; and decellularized human femoral artery, were implanted subcutaneously in 225 rats. The tissues at the implantation site were investigated for a period of 5 to 90 days. Classical histology and nonlinear optical microscopy (NLOM) were applied. RESULTS The investigations showed no rejection of all the collagen materials. The period of matrix bioresorption varied from 10 days for collagen sponges to 2 months for decellularized and freeze-dried vessels and vicryl meshes. Collagen was prone to macrophage resorption and enzymatic lysis, being replaced by granulation tissue and then fibrous tissue, followed by its involution. NLOM allowed the investigators to study the number, density, interposition, and spatial organization of collagen structures in the matrices and adjacent tissues, and their change over time during implantation. CONCLUSION The performed investigation could recommend three matrices: hybrid collagen/vicryl composite; decellularized bovine dermis; and decellularized porcine small intestinal submucosa, which are most adequate for tissue engineering in urology. These and other collagen matrices may be used in different areas of regenerative medicine.
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Affiliation(s)
- A B Shekhter
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - A E Guller
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia; Macquarie University, Sydney, Australia
| | - L P Istranov
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - E V Istranova
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - D V Butnaru
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - A Z Vinarov
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - O L Zakharkina
- Institute for Problems of Laser and Information Technologies, Russian Academy of Sciences, Moscow, Russia
| | - A V Kurkov
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - D F Kantimerov
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - E N Antonov
- Institute for Problems of Laser and Information Technologies, Russian Academy of Sciences, Moscow, Russia
| | - L V Marisov
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - P V Glybochko
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
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Manickavasagam A, Hirvonen LM, Melita LN, Chong EZ, Cook RJ, Bozec L, Festy F. Multimodal optical characterisation of collagen photodegradation by femtosecond infrared laser ablation. Analyst 2014; 139:6135-43. [PMID: 25318007 DOI: 10.1039/c4an01523a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Collagen is a structural component of the human body, as a connective tissue it can become altered as a result of pathophysiological conditions. Although the collagen degradation mechanism is not fully understood, it plays an important role in ageing, disease progression and applications in therapeutic laser treatments. To fully understand the mechanism of collagen alteration, in our study photo-disruptive effects were induced in collagen I matrix by point-irradiation with a femtosecond Ti-sapphire laser under controlled laser ablation settings. This was followed by multi-modal imaging of the irradiated and surrounding areas to analyse the degradation mechanism. Our multi-modal methodology was based on second harmonic generation (SHG), scanning electron microscope (SEM), autofluorescence (AF) average intensities and the average fluorescence lifetime. This allowed us to quantitatively characterise the degraded area into four distinct zones: (1) depolymerised zone in the laser focal spot as indicated by the loss of SHG signal, (2) enhanced crosslinking zone in the inner boundary of the laser induced cavity as represented by the high fluorescence ring, (3) reduced crosslinking zone formed the outer boundary of the cavity as marked by the increased SHG signal and (4) native collagen. These identified distinct zones were in good agreement with the expected photochemical changes shown using Raman spectroscopy. In addition, imaging using polarisation-resolved SHG (p-SHG) revealed both a high degree of fibre re-orientation and a SHG change in tensor ratios around the irradiation spot. Our multi-modal optical imaging approach can provide a new methodology for defining distinct zones that can be used in a clinical setting to determine suitable thresholds for applying safe laser treatments without affecting the surrounding tissues. Furthermore this technique can be extended to address challenges observed in collagen based tissue engineering and used as a minimally invasive diagnostic tool to characterise diseased and non-diseased collagen rich tissues.
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Affiliation(s)
- A Manickavasagam
- Biomaterial, Biomimetics & Biophotonics Division, King's College London Dental Institute, London, UK.
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Lee H, Huttunen MJ, Hsu KJ, Partanen M, Zhuo GY, Kauranen M, Chu SW. Chiral imaging of collagen by second-harmonic generation circular dichroism. BIOMEDICAL OPTICS EXPRESS 2013; 4:909-16. [PMID: 23761852 PMCID: PMC3675869 DOI: 10.1364/boe.4.000909] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/15/2013] [Accepted: 05/16/2013] [Indexed: 05/03/2023]
Abstract
We provide evidence that the chirality of collagen can give rise to strong second-harmonic generation circular dichroism (SHG-CD) responses in nonlinear microscopy. Although chirality is an intrinsic structural property of collagen, most of the previous studies ignore that property. We demonstrate chiral imaging of individual collagen fibers by using a laser scanning microscope and type-I collagen from pig ligaments. 100% contrast level of SHG-CD is achieved with sub-micrometer spatial resolution. As a new contrast mechanism for imaging chiral structures in bio-tissues, this technique provides information about collagen morphology and three-dimensional orientation of collagen molecules.
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Affiliation(s)
- H. Lee
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - M. J. Huttunen
- Department of Physics, Tampere University of Technology, P.O. Box 692, Tampere, Finland
| | - K.-J. Hsu
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - M. Partanen
- Department of Physics, Tampere University of Technology, P.O. Box 692, Tampere, Finland
| | - G.-Y. Zhuo
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - M. Kauranen
- Department of Physics, Tampere University of Technology, P.O. Box 692, Tampere, Finland
| | - S.-W. Chu
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
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