scholarly journals In Vivo Evaluation of Decellularized Human Tooth Scaffold for Dental Tissue Regeneration

2021 ◽  
Vol 11 (18) ◽  
pp. 8472
Author(s):  
Ik-Hwan Kim ◽  
Mijeong Jeon ◽  
Kyounga Cheon ◽  
Sun Ha Kim ◽  
Han-Sung Jung ◽  
...  
Keyword(s):  
Stem Cells ◽  
Tissue Regeneration ◽  
Tooth Development ◽  
Healing Process ◽  
Permanent Teeth ◽  
Human Tooth ◽  
Pulp Tissue ◽  
Dental Tissue ◽  
In Vivo Evaluation

Conventional root canal treatment may result in loss of tooth vitality, which can lead to unfavorable treatment outcomes. Notably, a ceased tooth development of immature permanent teeth with open apices, regeneration of periodontal ligaments (PDL), and pulp is highly expected healing process. For regeneration, the scaffold is one of the critical components that carry biological benefits. Therefore, this study evaluated a decellularized human tooth as a scaffold for the PDL and pulp tissue regeneration. A tooth scaffold was fabricated using an effective decellularization method as reported in previous studies. PDL stem cells (PDLSCs) and dental pulp stem cells (DPSCs) obtained from human permanent teeth were inoculated onto decellularized scaffolds, then cultured to transplant into immunosuppressed mouse. After 9 weeks, PDLSCs and DPSCs that were inoculated onto decellularized tooth scaffolds and cultured in an in vivo demonstrated successful differentiation. In PDLSCs, a regeneration of the cementum/PDL complex could be expected. In DPSCs, the expression of genes related to revascularization and the hard tissue regeneration showed the possibility of pulp regeneration. This study suggested that the potential possible application of decellularized human tooth could be a scaffold in regeneration PDL and pulp tissue along with PDLSCs and DPSCs, respectively, as a novel treatment method.

Whole-tooth tissue engineering: lessons from development

2011 ◽  
Vol 2 (2) ◽  
pp. 84-86
Author(s):  
Alastair J Sloan
Keyword(s):  
Tissue Engineering ◽  
Stem Cells ◽  
Tissue Regeneration ◽  
Tooth Development ◽  
Embryonic Stem ◽  
Dental Disease ◽  
Dental Tissue ◽  
Dental Practitioners ◽  
Natural Tissue ◽  
Bio Engineering

In an era of regenerative medicine, dentistry can be at the forefront due to the restorative procedures dental practitioners currently use. Orthopaedic practice encourages tissue regeneration through guided tissue regeneration and long term programmes of research on dental tissue regeneration have allowed us to develop a mechanistic understanding of the biological processes underpinning the key events during caries-induced natural tissue regeneration. These may be translated into novel therapies, which will improve on the relatively empirical traditional dental restorative approaches. Tissue engineering solutions for dental disease offer exciting and realistic opportunities and recent reports of bio-engineering of tooth structures and dental tissue regeneration have opened the way for exploitation of these technologies. Engineering of a whole ‘bio-tooth’ and its clinical application may be achievable in the longer term while exploitation of the natural reparative ability of the dentine-pulp complex is leading to significant advances in providing more translational solutions to address the effects of dental disease. Stem cells from the dental pulp have been extensively studied as a source for tooth regeneration but the use of stem cells from bone marrow and embryonic stem cells has demonstrated the possibility of generating teeth from non-dental cells by carefully mimicking the mechanisms observed during embryonic development. There are many challenges ahead but by a careful understanding of both the cell and the molecular biology underpinning tooth development, dentine repair, and the role of stem cells in these processes, tissue-engineered teeth could be a choice for replacement of missing teeth.

scholarly journals Insight into the Role of Dental Pulp Stem Cells in Regenerative Therapy

Biology ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 160 ◽  
Author(s):  
Shinichiro Yoshida ◽  
Atsushi Tomokiyo ◽  
Daigaku Hasegawa ◽  
Sayuri Hamano ◽  
Hideki Sugii ◽  
...  
Keyword(s):  
Stem Cells ◽  
Tissue Regeneration ◽  
Dental Pulp ◽  
High Growth ◽  
Dental Pulp Stem Cells ◽  
Permanent Teeth ◽  
Deciduous Teeth ◽  
Pulp Tissue ◽  
Differentiation Potential ◽  
Cell Based Therapy

Mesenchymal stem cells (MSCs) have the capacity for self-renewal and multilineage differentiation potential, and are considered a promising cell population for cell-based therapy and tissue regeneration. MSCs are isolated from various organs including dental pulp, which originates from cranial neural crest-derived ectomesenchyme. Recently, dental pulp stem cells (DPSCs) and stem cells from human exfoliated deciduous teeth (SHEDs) have been isolated from dental pulp tissue of adult permanent teeth and deciduous teeth, respectively. Because of their MSC-like characteristics such as high growth capacity, multipotency, expression of MSC-related markers, and immunomodulatory effects, they are suggested to be an important cell source for tissue regeneration. Here, we review the features of these cells, their potential to regenerate damaged tissues, and the recently acquired understanding of their potential for clinical application in regenerative medicine.

Regenerative potential of stem cells derived from human exfoliated deciduous (SHED) teeth during engineering of human body tissues

2020 ◽  
Vol 16 ◽  
Author(s):  
Shivkanya Fuloria ◽  
Ajay Jain ◽  
Sameep Singh ◽  
Iswar Hazarika ◽  
Samson Salile ◽  
...  
Keyword(s):  
Stem Cells ◽  
Human Body ◽  
In Vivo Studies ◽  
Permanent Teeth ◽  
Deciduous Teeth ◽  
Pulp Tissue ◽  
Human Teeth ◽  
Body Tissues

Abstract:: Current decade witnesses the regenerative potential of stem cells (SCs) based life-saving therapies for the treatment of various disease and conditions. Human teeth act as reservoir for SCs that exist with high abundance in baby, wisdom, and permanent teeth. The collection of stem cells from human exfoliated deciduous teeth (SHED) is considered as a simple process as it offers the convenience of little or no pain. In comparison to the SCs from dental or bone marrow or other tissues, the SHED offers the benefit of higher cellular differentiation and proliferation. Massive in vitro and in vivo studies reveal the regenerative potential of SHED in the engineering of dental pulp tissue, neuronal tissue, root, bio root, cardiovascular tissues, lymphatic tissues, renal tissues, dermal tissues, hepatic tissues, and bone tissues. Current review describes the methods of collection/isolation/storage, various biomarkers, and types of SHED. This review highlights the regenerative potential of SHED in the engineering of different tissues of human body. As per the available research evidences present study supports that SHED may differentiate into the endothelial cells, neurons, odontoblasts, pancreatic

Stem Cells Derived from Human Exfoliated Deciduous teeth [shed] in Neuronal Disorders: A Review

2020 ◽  
Vol 16 ◽  
Author(s):  
Minu Anoop ◽  
Indrani Datta
Keyword(s):  
Stem Cells ◽  
Neurodegenerative Diseases ◽  
Dental Pulp ◽  
Therapeutic Potential ◽  
Permanent Teeth ◽  
Deciduous Teeth ◽  
Proliferative Potential ◽  
Pulp Tissue ◽  
Human Exfoliated Deciduous Teeth

: Most conventional treatments for neurodegenerative diseases fail due to their focus on neuroprotection rather than neurorestoration. Stem cell‐based therapies are becoming a potential treatment option for neurodegenerative diseases as they can home in, engraft, differentiate and produce factors for CNS recovery. Stem cells derived from human dental pulp tissue differ from other sources of mesenchymal stem cells due to their embryonic neural crest origin and neurotrophic property. These include both dental pulp stem cells [DPSCs] from dental pulp tissues of human permanent teeth and stem cells from human exfoliated deciduous teeth [SHED]. SHED offer many advantages over other types of MSCs such as good proliferative potential, minimal invasive procurement, neuronal differentiation and neurotrophic capacity, and negligible ethical concerns. The therapeutic potential of SHED is attributed to the paracrine action of extracellularly released secreted factors, specifically the secretome, of which exosomes is a key component. SHED and its conditioned media can be effective in neurodegeneration through multiple mechanisms, including cell replacement, paracrine effects, angiogenesis, synaptogenesis, immunomodulation, and apoptosis inhibition, and SHED exosomes offer an ideal refined bed-to-bench formulation in neurodegenerative disorders. However, in spite of these advantages, there are still some limitations of SHED exosome therapy, such as the effectiveness of long-term storage of SHED and their exosomes, the development of a robust GMP-grade manufacturing protocol, optimization of the route of administration, and evaluation of the efficacy and safety in humans. In this review, we have addressed the isolation, collection and properties of SHED along with its therapeutic potential on in vitro and in vivo neuronal disorder models as evident from the published literature.

scholarly journals In vivo evaluation of a recombinant N-acylhomoserine lactonase formulated in a hydrogel using a murine model infected with MDR Pseudomonas aeruginosa clinical isolate, CCASUP2

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Masarra M. Sakr ◽  
Walid F. Elkhatib ◽  
Khaled M. Aboshanab ◽  
Eman M. Mantawy ◽  
Mahmoud A. Yassien ◽  
...  
Keyword(s):  
Survival Rate ◽  
Murine Model ◽  
Histopathological Examination ◽  
Healing Process ◽  
Bacterial Count ◽  
Treated Group ◽  
Control Group ◽  
In Vivo Evaluation ◽  
Systemic Spread

AbstractFailure in the treatment of P. aeruginosa, due to its broad spectrum of resistance, has been associated with increased patient mortality. One alternative approach for infection control is quorum quenching which was found to decrease virulence of such pathogen. In this study, the efficiency of a recombinant Ahl-1 lactonase formulated as a hydrogel was investigated to control the infection of multidrug resistant (MDR) P. aeruginosa infected burn using a murine model. The recombinant N-acylhomoserine lactonase (Ahl-1) was formulated as a hydrogel. To test its ability to control the infection of MDR P. aeruginosa, a thermal injury model was used. Survival rate, and systemic spread of the infection were evaluated. Histopathological examination of the animal dorsal skin was also done for monitoring the healing and cellular changes at the site of infection. Survival rate in the treated group was 100% relative to 40% in the control group. A decrease of up to 3 logs of bacterial count in the blood samples of the treated animals relative to the control group and a decrease of up to 4 logs and 2.3 logs of bacteria in lung and liver samples, respectively were observed. Histopathological examination revealed more enhanced healing process in the treated group. Accordingly, by promoting healing of infected MDR P. aeruginosa burn and by reducing systemic spread of the infection as well as decreasing mortality rate, Ahl-1 hydrogel application is a promising strategy that can be used to combat and control P. aeruginosa burn infections.

scholarly journals Regenerative potential of secretome from dental stem cells: a systematic review of preclinical studies

2018 ◽  
Vol 29 (3) ◽  
pp. 321-332 ◽  
Author(s):  
Suleiman Alhaji Muhammad ◽  
Norshariza Nordin ◽  
Sharida Fakurazi
Keyword(s):  
Systematic Review ◽  
Stem Cells ◽  
Stem Cell ◽  
Animal Models ◽  
Conditioned Medium ◽  
Tissue Regeneration ◽  
Therapeutic Benefit ◽  
Risk Of Bias ◽  
Preclinical Studies

AbstractInjury to tissues is a major clinical challenge due to the limited regenerative capacity of endogenous cells. Stem cell therapy is evolving rapidly as an alternative for tissue regeneration. However, increasing evidence suggests that the regenerative ability of stem cells is mainly mediated by paracrine actions of secretome that are generally secreted by the cells. We aimed to systematically evaluate the efficacy of dental stem cell (DSC)-conditioned medium inin vivoanimal models of various tissue defects. A total of 15 eligible studies was included by searching Pubmed, Scopus and Medline databases up to August 2017. The risk of bias was assessed using the Systematic Review Centre for Laboratory Animal Experimentation risk of bias tool. Of 15 studies, seven reported the therapeutic benefit of the conditioned medium on neurological diseases and three reported on joint/bone-related defects. Two interventions were on liver diseases, whereas the remaining three addressed myocardial infarction and reperfusion, lung injury and diabetes. Nine studies were performed using mouse models and the remaining six studies used rat models. The methodological quality of the studies was low, as most of the key elements required in reports of preclinical studies were not reported. The findings of this review suggested that conditioned medium from DSCs improved tissue regeneration and functional recovery. This current review strengthens the therapeutic benefit of cell-free product for tissue repair in animal models. A well-planned study utilizing validated outcome measures and long-term safety studies are required for possible translation to clinical trials.

scholarly journals Dental Pulp Tissue Regeneration Using Dental Pulp Stem Cells Isolated and Expanded in Human Serum

2017 ◽  
Vol 43 (4) ◽  
pp. 568-574 ◽  
Author(s):  
Evandro Piva ◽  
Susan A. Tarlé ◽  
Jacques E. Nör ◽  
Duohong Zou ◽  
Elizabeth Hatfield ◽  
...  
Keyword(s):  
Stem Cells ◽  
Human Serum ◽  
Tissue Regeneration ◽  
Dental Pulp ◽  
Dental Pulp Stem Cells ◽  
Pulp Tissue ◽  
Dental Pulp Tissue ◽  
Pulp Tissue Regeneration

scholarly journals Development of A Three-Dimensional Tissue Construct from Dental Human Ectomesenchymal Stem Cells: In Vitro and In Vivo Study

2012 ◽  
Vol 6 (1) ◽  
pp. 226-234 ◽  
Author(s):  
Daniela Guzmán-Uribe ◽  
Keila Neri Alvarado Estrada ◽  
Amaury de Jesús Pozos Guillén ◽  
Silvia Martín Pérez ◽  
Raúl Rosales Ibáñez
Keyword(s):  
Three Dimensional ◽  
Human Tooth ◽  
Animal Cells ◽  
Dental Tissue ◽  
Membrane Markers ◽  
Tissue Organization ◽  
Specific Membrane ◽  
Tissue Construct

Application of regenerative medicine technology provides treatment for patients with several clinical problems, like loss of tissue and its function. The investigation of biological tooth replacement, dental tissue engineering and cell culture, scaffolds and growth factors are considered essential. Currently, studies reported on the making of threedimensional tissue constructs focused on the use of animal cells in the early stages of embryogenesis applied to young biomodels. The purpose of this study was the development and characterization of a three-dimensional tissue construct from human dental cells. The construct was detached, cultured and characterized in mesenchymal and epithelial cells of a human tooth germ of a 12 year old patient. The cells were characterized by specific membrane markers (STRO1, CD44), making a biocomplex using Pura Matrix as a scaffold, and it was incubated for four days and transplanted into 30 adult immunosuppressed male Wistar rats. They were evaluated at 6 days, 10 days and 2 months, obtaining histological sections stained with hematoxylin and eosin. Cell cultures were positive for specific membrane markers, showing evident deviations in morphology under phase contrast microscope. Differentiation and organization were noted at 10 days, while the constructs at 2 months showed a clear difference in morphology, organization and cell type. It was possible to obtain a three-dimensional tissue construct from human dental ectomesenchymal cells achieving a degree of tissue organization that corresponds to the presence of cellular stratification and extracellular matrix.

scholarly journals Fully reduced HMGB1 accelerates the regeneration of multiple tissues by transitioning stem cells to GAlert

2018 ◽  
Vol 115 (19) ◽  
pp. E4463-E4472 ◽  
Author(s):  
Geoffrey Lee ◽  
Ana Isabel Espirito Santo ◽  
Stefan Zwingenberger ◽  
Lawrence Cai ◽  
Thomas Vogl ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Tissue Regeneration ◽  
Cell Function ◽  
Elective Surgery ◽  
High Mobility ◽  
Underlying Mechanism ◽  
Clinical Scenarios ◽  
Stem And Progenitor Cells

A major discovery of recent decades has been the existence of stem cells and their potential to repair many, if not most, tissues. With the aging population, many attempts have been made to use exogenous stem cells to promote tissue repair, so far with limited success. An alternative approach, which may be more effective and far less costly, is to promote tissue regeneration by targeting endogenous stem cells. However, ways of enhancing endogenous stem cell function remain poorly defined. Injury leads to the release of danger signals which are known to modulate the immune response, but their role in stem cell-mediated repair in vivo remains to be clarified. Here we show that high mobility group box 1 (HMGB1) is released following fracture in both humans and mice, forms a heterocomplex with CXCL12, and acts via CXCR4 to accelerate skeletal, hematopoietic, and muscle regeneration in vivo. Pretreatment with HMGB1 2 wk before injury also accelerated tissue regeneration, indicating an acquired proregenerative signature. HMGB1 led to sustained increase in cell cycling in vivo, and using Hmgb1−/− mice we identified the underlying mechanism as the transition of multiple quiescent stem cells from G0 to GAlert. HMGB1 also transitions human stem and progenitor cells to GAlert. Therefore, exogenous HMGB1 may benefit patients in many clinical scenarios, including trauma, chemotherapy, and elective surgery.

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