In recent years, stem cell therapy has become a very promising and advanced scientific research topic. The development of treatment methods has evoked great expectations. This paper is a review focused on the discovery of different stem cells and the potential therapies based on these cells. The genesis of stem cells is followed by laboratory steps of controlled stem cell culturing and derivation. Quality control and teratoma formation assays are important procedures in assessing the properties of the stem cells tested. Derivation methods and the utilization of culturing media are crucial to set proper environmental conditions for controlled differentiation. Among many types of stem tissue applications, the use of graphene scaffolds and the potential of extracellular vesicle-based therapies require attention due to their versatility. The review is summarized by challenges that stem cell therapy must overcome to be accepted worldwide. A wide variety of possibilities makes this cutting edge therapy a turning point in modern medicine, providing hope for untreatable diseases.

/pdf/stem-cells-past-present-and-future-454he6l4j5.pdf

Stem cells: past, present, and future.

Recently, a growing attention has been observed toward potential advantages of stem cell (SC)-based therapies in regenerative treatments. Mesenchymal stem/stromal cells (MSCs) are now considered excellent candidates for tissue replacement therapies and tissue engineering. Autologous MSCs importantly contribute to the state-of-the-art clinical strategies for SC-based alveolar bone regeneration. The donor cells and immune cells play a prominent role in determining the clinical success of MSCs therapy. In line with the promising future that stem cell therapy has shown for tissue engineering applications, dental stem cells have also attracted the attention of the relevant researchers in recent years. The current literature review aims to survey the variety and extension of SC-application in tissue-regenerative dentistry. In this regard, the relevant English written literature was searched using keywords: "tissue engineering", "stem cells", "dental stem cells", and "dentistry strategies". According to the available database, SCs application has become increasingly widespread because of its accessibility, plasticity, and high proliferative ability. Among the growing recognized niches and tissues containing higher SCs, dental tissues are evidenced to be rich sources of MSCs. According to the literature, dental SCs are mostly present in the dental pulp, periodontal ligament, and dental follicle tissues. In this regard, the present review has described the recent findings on the potential of dental stem cells to be used in tissue regeneration.

Role and application of stem cells in dental regeneration: A comprehensive overview

https://doi.org/10.1016/j.bioactmat.2022.09.019

A shear-thinning, ROS-scavenging hydrogel combined with dental pulp stem cells promotes spinal cord repair by inhibiting ferroptosis

Dental problems including cavities, periodontitis, apical periodontitis, and pulpitis are among the most cost-consuming burden for both patients and the health care system all over the world. The pathological consequences of these complications importantly lead to tooth loss causing functional and psychological conflictions for patients. The traditional treatment includes removing the impaired tooth or its restoration using hard restorative materials that are supposed to mimic the tissue of enamel or dentine whereas these materials cannot simulate the chemical, biological, or physical characteristics of a natural tooth. Therefore, different daily-progressing methods of tissue engineering (TE) are being propounded as new and promising approaches for managing dentistry conflicts. TE is now considered almost a practical, reproducible, and clinically safe therapy for regenerating different oral and dental tissues including either the whole dental organ or its various anatomical parts. TE necessarily constitutes three angles of stem cell (SC), scaffold, and essential growth factors (GFs). Generally, scaffolds can be made of decellularized scaffolds (usually containing the extra-cellular matrix (ECM) of target organs and tissues) or biologic scaffolds (containing natural polymer). The current study aims to review the studies conducted in the recent decade on decellularized and biological scaffolds and their potential applications in modern regenerative dentistry.

Decellularized and biological scaffolds in dental and craniofacial tissue engineering: a comprehensive overview

OBJECTIVE Parathyroid hormone (PTH) is a main systemic mediator of calcium and phosphate homeostasis in the bone. Dental pulp stem cells (DPSCs) have been extensively studied in the regeneration of bone and tooth tissues. This paper aims to uncover the influences of PTH on the proliferative ability and osteo/odontogenic differentiation of DPSCs, as well as the underlying mechanisms. MATERIALS AND METHODS The optimal concentration of PTH on DPSCs was determined by alkaline phosphatase (ALP) activity assay, ALP staining and western blot analysis. Proliferative ability and cell cycle distribution of DPSCs were analyzed by Cell counting kit-8, 5-ethynyl-20-deoxyuridine assay, and flow cytometry. Osteo/odontogenic capacity of DPSCs was evaluated and finally, the involvement of mitogen-activated protein kinase (MAPK) pathway was assessed. RESULTS Purified DPSCs were obtained by enzymatic digestion, which presented a typical fibroblast-like morphology. 10-9  mol/L PTH was concerned as the optimal concentration for DPSCs induction. 10-9  mol/L PTH treatment did not change the proliferative rate of DPSCs (p > .05). Relative expressions of DSPP/DSPP, RUNX2/RUNX2, OSX/OSX, and ALP/ALP were upregulated in PTH-treated DPSCs relative to control group. Particularly, their mRNA/protein levels at Day 7 were markedly higher relative to those at Day 3 (p < .05 or p < .01). Mineralized nodules were formed after PTH induction, and calcium content increased by cetylpyridinium chloride quantitative analysis. Mechanistically, the protein levels of p-ERK and p-P38 significantly increased after PTH treatment, and the inhibitors targeting MAPK were identified that weakened the effects of PTH on the committed differentiation of DPSCs. CONCLUSIONS PTH enhances the osteo/odontogenic differentiation capacity of DPSCs via ERK and P38 signaling pathways.

Parathyroid hormone enhances the osteo/odontogenic differentiation of dental pulp stem cells via ERK and P38 MAPK pathways.

Adult stem cells are excellent cell resource for cell therapy and regenerative medicine. Dental pulp stem cells (DPSCs) have been discovered and well known in various application. Here, we reviewed the history of dental pulp stem cell study and the detail experimental method including isolation, culture, cryopreservation, and the differentiation strategy to different cell lineage. Moreover, we discussed the future potential application of the combination of tissue engineering and of DPSC differentiation. This review will help the new learner to quickly get into the DPSC filed.

/pdf/recycle-the-dental-fairy-s-package-overview-of-dental-pulp-21dd0vi1m9.pdf

Recycle the dental fairy’s package: overview of dental pulp stem cells

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Recycle the dental fairy’s package: overview of dental pulp stem cells