iBB
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iBB
Institute for Bioengineering and Biosciences
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March 6, 1:18 PM
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Electrical stimulation towards improved osteogenic differentiation of human mesenchymal stem/stromal cells

Electrical stimulation towards improved osteogenic differentiation of human mesenchymal stem/stromal cells | iBB | Scoop.it

Electrical stimulation (ES) has been tested clinically for over 40 years to promote bone healing, mainly as an adjunct to standard fracture treatments. However, the biological mechanisms by which ES promotes bone healing and the osteogenic commitment of bone progenitors cells remain poorly described.

In a recent study published in Scientific Reports, iBB researchers (João C. Silva, Fábio Garrudo and Frederico Ferreira) in collaboration with Sofia Fernandes (IBEB-Faculdade de Ciências-Universidade de Lisboa) and João Meneses, Nuno Alves and Paula Pascoal-Faria (CDRSP-Politécnico de Leiria), study the effect of five different ES protocols on the viability, proliferation, and osteogenic differentiation of human bone marrow-derived mesenchymal stem/stromal cells (hBM-MSCs). A numerical finite element method (FEM) model of the culture platform was employed to characterize the system and predict the magnitude/distribution of the electric fields generated by the different ES protocols. In vitro cell culture studies showed that all the ES protocols did not impair cell viability and morphology and supported the osteogenic differentiation of hBM-MSCs. Our results evidenced relevant differences when considering the applied protocol operation mode (potential versus current controlled), including the choice of stimulus duration and period. They also suggest an improved performance of the applied current-controlled protocol (STIM3 OM) in promoting hBM-MSCs osteogenic differentiation as shown by a more efficient in vitro mineralization and higher expression of the late osteogenic marker genes. Overall, this work emphasizes the critical role of numerical modelling in selecting and optimizing ES parameters to improve MSC-based osteogenesis in vitro, a step forward towards the development of novel therapeutic strategies for bone regeneration.

This study was developed under the scope of the FCT funded projects “InSilico4OCReg” (PTDC/EME-SIS/0838/2021) and “OptiBioScafold” (PTDC/EME-SIS/4446/2020).

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March 6, 6:16 AM
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Heparinized Acellular Hydrogels for Magnetically Induced Wound Healing Applications

Heparinized Acellular Hydrogels for Magnetically Induced Wound Healing Applications | iBB | Scoop.it

The regulation of angiogenesis could be very helpful in the development of therapeutic approaches for wound healing and anticancer therapy. Recently, Dra. Filipa Pires from Instituto de Telecomunicações in collaboration with IBB (Dr. João C Silva and Dr. Frederico C. Ferreira) and FCT-UNL (Dr. Carla Portugal) researchers, designed magnetic heparinized hydrogels to modulate the anti-inflammatory and angiogenic activity of mesenchymal stem cells (MSCs), aiming to accelerate tissue healing. The results evidenced that the application of a static magnetic field guides MSC alignment and affects the angiogenic and anti-inflammatory character of the MSCs secretome. Particularly, the outcomes showed that the hydrogels containing less heparin and magnetic nanoparticles (0.25%) display a low pro-inflammatory character, ensuring an MSCs secretome with enhanced pro-angiogenic properties, which showed to be able to enhance wound contraction and cell migration rate compared to non-heparinized hydrogels.

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This work was recently published in ACS Applied Materials & Interfaces journal and was financially supported by the FCT project “BeLive” (PTDC/EDM/30828/2017).

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September 7, 2023 12:16 PM
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Hydroxyapatite-filled osteoinductive and piezoelectric nanofibers for bone tissue engineering

Hydroxyapatite-filled osteoinductive and piezoelectric nanofibers for bone tissue engineering | iBB | Scoop.it

The production of piezoelectric constructs in order to address osteoporotic-related fractures holds significant promise. Such scaffolds could be used to mimic the native piezoelectric features of bone as well as assisting electrical stimulation-based therapies, which have been found to accelerate bone repair. In an article recently published in the journal Science and Technology of Advanced Materials, iBB researchers Frederico Barbosa, João Silva, Fábio Garrudo, Marta Carvalho, Paola Alberte, Leonor Resina and Frederico Ferreira, in collaboration with colleagues from the University of Nottingham and the Universitat Politècnica de Catalunya, developed novel hydroxyapatite-filled PVDF-TrFE nanofibers with enhanced piezoelectrical properties and osteogenic potential.

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August 29, 2023 9:27 AM
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3D (Bio)printing of Magnetic Hydrogels and their Potential for Tissue Engineering Applications

3D (Bio)printing of Magnetic Hydrogels and their Potential for Tissue Engineering Applications | iBB | Scoop.it

Magnetic hydrogels have recently been drawing a lot of attention in the scientific community due to their remote controllability and high biocompatibility. By combining these materials with a 3D bioprinting technique, it is possible to fabricate intricate structures responsive to an external magnetic stimulus, thus allowing the tuning of the constructs properties to better recapitulate the microarchitecture of native tissues. In this article recently published in the International Journal of Bioprinting, iBB researchers Duarte Almeida, Paola Sanjuan-Alberte, João C. Silva and Frederico Ferreira provided an overview of the current state of the art of magnetic hydrogels, exploring the production of the magnetic components and their introduction in the hydrogels, and emphasizing the current research made on the applications of these materials for tissue engineering strategies.

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May 3, 2023 1:23 PM
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Innovative design and manufacturing of curvature-featuring scaffolds for osteochondral repair

Innovative design and manufacturing of curvature-featuring scaffolds for osteochondral repair | iBB | Scoop.it

The irreversible progressive nature of degenerative osteochondral defects, affecting both articular cartilage and the subchondral bone, is a leading cause for joint disease and disability among adults, resulting in severe limitations for people to perform daily activities and represents a heavy economic burden for society. Current treatments do no provide adequate long-term solutions and innovative tissue engineering strategies are regarded as a promising alternative to improve clinical outcomes. A key aspect that needs to be considered is the integration between native tissue and the tissue engineered construct. In this recent article resulting from a collaboration between researchers from iBB and CDRSP-Politécnico de Leiria, published in the Journal Polymers, a new approach to design and manufacture curved scaffolds to mimic osteochondral tissue geometry was presented. The curvature of the sphere was proposed as a template and a procedure was developed for an automated design of scaffolds with explicitly defined curvatures. Fused filament fabrication (3D-Printing) was used for scaffolds’ manufacturing. A Shape fidelity analysis implemented through micro-CT and SEM imaging validated the maximum curvature printability limit predicted from CAD modeling and confirmed the suitability of fused filament fabrication to manufacture curvature-featuring scaffolds. Additionally, a mechanical analysis was conducted with printed scaffolds and through finite element analysis to determine scaffold mechanical properties and identify the regions more susceptible to higher loads.

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November 15, 2022 4:17 AM
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Electrically Conductive Hydrogels for Articular Cartilage Tissue Engineering

Electrically Conductive Hydrogels for Articular Cartilage Tissue Engineering | iBB | Scoop.it

As current treatment options for cartilage degeneration remain ineffective, tissue engineering has emerged as an exciting approach to create cartilage substitutes. In particular, hydrogels seem to be suitable candidates for this purpose due to their high biocompatibility and customizability, being able to be tailored to fit the biophysical properties of native cartilage. Moreover, these hydrogel matrices can be combined with conductive materials in order to simulate the natural electrochemical properties of articular cartilage. In this recent review published in the journal Gels, iBB researchers Filipe Miguel (MSc student in Biotechnology), Frederico Barbosa (PhD student in Bioengineering), Prof. Frederico Ferreira and Dr. João Silva highlight the most common conductive materials combined with hydrogels and their diverse applications, and discuss the current state of research on the development of electrically conductive hydrogels for cartilage tissue engineering.

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March 23, 2022 12:22 PM
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Piezoelectric Nanofibers for Osteochondral Tissue Engineering

Piezoelectric Nanofibers for Osteochondral Tissue Engineering | iBB | Scoop.it

Osteochondral (OC) tissue disorders, particularly osteoarthritis, number among the most prevalent and debilitating diseases in the adult population worldwide. However, despite the recent achievements in the field, no satisfactory clinical treatments have been developed to date to resolve this unmet medical issue. Notably, while the piezoelectric nature of the OC tissue has been extensively reported in different studies, this feature keep being neglected in the design of novel biomaterial scaffolds for OC regeneration. Thus, piezoelectric electrospun scaffolds capable of both recapitulating the piezoelectric nature of the tissue’s fibrous extracellular matrix and of providing a platform for electrical and mechanical stimulation of cells/tissues are promising platforms to promote OC regeneration. In a recent publication in the International Journal of Molecular Sciences, SCERG-iBB researchers MSc Frederico Barbosa, Prof. Frederico Ferreira and Dr. João Silva review and discuss the current state of the art of such piezoelectric biomimetic scaffolds for OC tissue engineering strategies.

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January 25, 2021 8:54 AM
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Special Issue on “Advanced Polymeric Scaffolds for Stem Cell Engineering and Regenerative Medicine”

Special Issue on “Advanced Polymeric Scaffolds for Stem Cell Engineering and Regenerative Medicine” | iBB | Scoop.it

João Carlos Silva and Frederico Castelo Ferreira from SCERG-iBB are guest-editing a special issue for the open-access journal “Polymers” entitled “Advanced Polymeric Scaffolds for Stem Cell Engineering and Regenerative Medicine”. Polymer scaffolds play a crucial role in tissue engineering and regenerative medicine applications since they can closely mimic the architecture of a native extracellular matrix (ECM) and improve the biological performance of cells both in vitro and in vivo. This Special Issue welcomes full research papers, communications and reviews on recent exciting developments of polymeric scaffolds for tissue engineering and regenerative medicine applications.

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September 8, 2019 4:08 AM
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João Carlos Silva to Defend PhD Thesis in Bioengineering

João Carlos Silva to Defend PhD Thesis in Bioengineering | iBB | Scoop.it

João Carlos Fernandes da Silva will be defending his PhD thesis in Bioengineering (Cell Therapies and regenerative Medicine) at Instituto Superior Técnico, friday the 27th september 2019 (14:00 H, room PA-3). During the last years, and under the supervision of Frederico Ferreira from SCERG-iBB and Robert Linhardt from RPI, João focused his efforts on the fabrication of hierarchical and biomimetic cartilage constructs. The title of his thesis is "Bioengineering strategies towards the in vitro fabrication of hierarchical and biomimetic cartilage constructs".

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March 6, 6:20 AM
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Synergy between 3D electroconductive scaffolds and electrical stimulation to improve bone tissue engineering strategies

Synergy between 3D electroconductive scaffolds and electrical stimulation to improve bone tissue engineering strategies | iBB | Scoop.it

In a recent article published in the Journal of Materials Chemistry B, iBB researchers working in collaboration with colleagues from Instituto de Telecomunicações (IT), CDRSP-Politécnico de Leiria and CERENA, demonstrated a synergistic effect between 3D printed porous electroconductive scaffolds and electrical stimulation (EStim) in the enhancement of the osteogenic differentiation of human bone marrow derived mesenchymal stem/stromal cells (hBMSCs), envisaging improved bone tissue engineering (BTE) strategies. The 3D scaffolds were fabricated in polycaprolactone (PCL) and coated with the conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) following previously optimized strategies. Results show that the PEDOT:PSS coatings are electroconductive (11.3–20.1 S cm−1), stable (up to 21 days in saline solution), allow the immobilization of gelatin (Gel) to further improve bioactivity, and enhance the in vitro mineralization of the scaffolds. Finite element modelling allowed the prediction of the magnitude and distribution of the electrical fields within the conductive scaffolds structure when submitted to EStim. The osteogenic differentiation of hBMSCs was performed with and without EStim and the abovementioned synergy between conductive materials and EStim in the improvement of BTE strategies was clearly shown by the increased cell-secreted calcium deposition (tissue mineralization) and by the upregulation of bone-specific marker genes. This study was coordinated by Dr. João C. Silva (iBB) and Dr. Fabio Garrudo (iBB and IT) and performed under the scope of the FCT projects BioMaterARISES (EXPL/CTM-CTM/0995/2021) and InSilico4OCReg (PTDC/EME-SIS/0838/2021).

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September 18, 2023 5:33 AM
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SCERG-iBB researcher João Carlos Silva was awarded with a ON Foundation Education Travel Grant to attend EORS 2023

SCERG-iBB researcher João Carlos Silva was awarded with a ON Foundation Education Travel Grant to attend EORS 2023 | iBB | Scoop.it

João Carlos Silva was awarded with one of the Education Travel Grants of the Orthoregeneration Network (ON) Foundation to participate and share the latest developments of his research work on novel strategies for bone and cartilage tissue engineering in the European Orthopaedic Research Society (EORS) conference meeting 2023, which will be held on the 27th-29th September at the Alfandega Porto Congress Centre, Porto-Portugal.

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September 7, 2023 12:11 PM
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Novel Electroactive Mineralized Polyacrylonitrile/PEDOT:PSS Electrospun Nanofibers for Bone Repair Applications

Novel Electroactive Mineralized Polyacrylonitrile/PEDOT:PSS Electrospun Nanofibers for Bone Repair Applications | iBB | Scoop.it

The repair of bone defects remains an important challenge in current orthopaedic clinical practice. Novel approaches, including electrical stimulation-based therapies, have been gaining traction due to their encouraging results in both in vivo and in vitro settings. The development of electroconductive scaffolds to assist this type of therapy holds significant promise, as such constructs could be used to guide electrical stimuli directly to the damaged site, therefore increasing the effectiveness of the regeneration process. In an article recently published in the journal International Journal of Molecular Sciences, iBB researchers Frederico Barbosa, João Silva, Fábio Garrudo and Frederico Ferreira, in collaboration with colleagues from Instituto de Telecomunicações (IT) and CERENA, developed mineralized and electroconductive PEDOT:PSS-based nanofibers with bone-like features. This project was developed under the scope of Frederico Barbosa’s PhD thesis, supervised by Frederico Ferreira and João Silva.

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June 12, 2023 2:05 PM
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“Advanced Bioprocessing Strategies for Tissue Engineering and Biomimetic Modelling Applications” in Frontiers in Bioengineering and Biotechnology

“Advanced Bioprocessing Strategies for Tissue Engineering and Biomimetic Modelling Applications” in Frontiers in Bioengineering and Biotechnology | iBB | Scoop.it

Advances in bioprocessing technologies have allowed the scalable and reproducible fabrication of tissue engineering (TE) constructs with higher structural complexity and functionality, achieving a closer mimicry of native-like microenvironments. The Research Topic co-edited by iBB researchers Dr. João C. Silva and Dr. Carlos Rodrigues in collaboration with Prof. Eirini Velliou (University College London, UK) and Prof. Diana Massai (Politecnico di Torino, Italy) aims to provide an overview of the major advances in bioprocessing technologies and methods for TE and regenerative medicine applications. Relevant strategies involving bioreactors, microfluidic systems, 3D bio-printed tissues and organ-on-chips that provide biomimetic, monitored, and controlled 3D in vitro culture conditions for the biophysical stimulation of cells or TE constructs towards improved functionality will receive special attention. Novel stem cell bioengineering and biomaterial-based approaches applied to regenerative medicine and in vitro disease modelling are also of special interest, together with new technologies for biological tissue characterization or for identifying and testing innovative pharmacological treatments. Moreover, innovative in silico and AI-based approaches paving the way towards optimized and automated TE strategies are also welcomed.

This Research Topic invites contributions (Original Research articles and Literature Review manuscripts) describing and discussing the most recent and innovative developments in bioprocessing TE strategies for regenerative medicine and disease modelling applications, leveraged by advances in bioreactor systems, novel biomaterials, 3D bioprinting methods, imaging and biosensing, computational modelling, AI and machine learning, among others.

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April 13, 2023 10:35 AM
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Recent Advances on Electrospun Nanofibers for Periodontal Regeneration

Recent Advances on Electrospun Nanofibers for Periodontal Regeneration | iBB | Scoop.it

As current treatments for periodontitis have failed to promote tissue repair and the coordinated regeneration of the whole periodontium, innovative therapeutic strategies are urgently needed to improve the clinical outcomes. Electrospun nanofibrous scaffolds are particularly promising for applications in periodontal regeneration since they are able to mimic the native tissue extracellular matrix (ECM) features such as the size and alignment of the fibers present in the periodontal ligament (PDL). In this article recently published in the journal Nanomaterials, iBB researchers MSc Mafalda Santos, Dr. Marta Carvalho and Dr. João Silva provided an overview of the current state of the art of the application of electrospun nanofibers in periodontal regeneration, either as guided tissue regeneration (GTR) membranes or as scaffolds for tissue engineering strategies.

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April 28, 2022 3:21 AM
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Additive Manufactured PCL-Graphene Scaffolds for Tissue Engineering

Additive Manufactured PCL-Graphene Scaffolds for Tissue Engineering | iBB | Scoop.it

Understanding the mechano–biological coupling mechanisms of biomaterials for tissue engineering is of major importance to assure proper scaffold performance in situ. Therefore, it is of paramount importance to establish correlations between biomaterials, their processing conditions, and their mechanical behaviour, as well as their biological performance. In a collaborative work between CDRSP-Politécnico de Leiria and SCERG-iBB  (João C. Silva and Frederico Ferreira), it was possible to infer a correlation between the addition of different concentrations of graphene nanoparticles (GPN) in three-dimensional poly(ε-caprolactone) (PCL)-based scaffolds, their extrusion-based processing parameters, and the lamellar crystal orientation observed in the different scaffolds through small-angle X-ray scattering experiments. Moreover, in vitro cell culture studies performed at SCERG-iBB demonstrated the suitability and potential of these novel 3D PCL/GPN scaffolds for tissue engineering applications. The results of this study were just published in Polymers.

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February 23, 2022 11:48 AM
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InSilico4OCReg – Computational Models Optimizing In Vitro Biophysical Stimulation Protocols for Osteochondral Regeneration

InSilico4OCReg – Computational Models Optimizing In Vitro Biophysical Stimulation Protocols for Osteochondral Regeneration | iBB | Scoop.it

The research project “InSilico4OCReg - In silico models guiding in vitro biophysical stimulation of biomimetic hierarchical scaffolds: a computational modelling approach towards functional osteochondral regeneration” was recommended for funding by FCT (250,000 euros in the 2021 Call for SR&TD Project Grants). The project started in January 2022 and aims to develop an innovative combined in silico modelling-in vitro experimental system which, inspired by the properties of the native osteochondral tissue, will be able to optimize tissue engineering strategies towards the production of implants with improved functionality and mechanical properties. The multidisciplinary team of InSilico4OCReg includes researchers from iBB, CDRSP-Politécnico de Leiria, Rensselaer Polytechnic Institute (Troy, NY-USA), and an orthopedic surgeon (Hospital dos Lusíadas). The project, which falls within the scientific area of Mechanical Engineering-Engineering Systems, is headed by João Carlos Silva (PI, SCERG-iBB) and Prof. Paula Pascoal-Faria (co-PI, CDRSP-Politécnico de Leiria).

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October 3, 2019 6:58 AM
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Development of Extruded Perfusion Bioreactor Platform for Cartilage Tissue Engineering

Development of Extruded Perfusion Bioreactor Platform for Cartilage Tissue Engineering | iBB | Scoop.it

Bioreactors that provide different biophysical stimuli have been used in tissue engineering approaches aimed at enhancing the quality of the cartilage tissue generated. However, such systems are often highly complex, costly and not very versatile. In a recent study published in Biotechnology Journal, researchers from SCERG-iBB working with colleagues from the Polytechnic Institute of Leiria and Rensselaer Polytechnic Institute (USA) developed a novel, cost-effective and customizable perfusion bioreactor fabricated by additive manufacturing (AM) to study of the effect of fluid flow on the chondrogenic differentiation of human bone-marrow mesenchymal stem/stromal cells (hBMSCs) in 3D porous poly (ε-caprolactone) (PCL) scaffolds. Results suggest that the chondrogenic differentiation of hBMSCs was enhanced in cell-scaffold constructs cultured under perfusion and highlights the potential of customizable AM platforms for developing more reliable in vitro models and improved personalized cartilage repair strategies.

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February 28, 2019 4:36 AM
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Compositional and Structural Analysis of GAGs in Cell-Derived ECM

Compositional and Structural Analysis of GAGs in Cell-Derived ECM | iBB | Scoop.it

Cell-derived ECM have emerged as promising materials for regenerative medicine due to their ability to recapitulate the native tissue microenvironment. However, little is known about the glycosaminoglycan (GAG) composition of these cell-derived ECM. In a recent study published in Glycoconjugate Journal, researchers from SCERG-iBB, working in collaboration with colleagues from the Rensselaer Polytechnic Institute, characterized three different cell-derived ECM in terms of their GAG content, composition and sulfation patterns using a highly sensitive LC-MS/MS technique. Distinct GAG compositions and disaccharide sulfation patterns were verified for the different cell-derived ECM. Additionally, the effect of decellularization method on the GAG and disaccharide relative composition was also assessed. The method offers a novel approach to determine the GAG composition of cell-derived ECM, which we believe is critical for a better understanding of ECM role in directing cellular responses and has the potential for generating important knowledge for the development of new ECM-like biomaterials for tissue engineering applications.

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