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https://www.readbyqxmd.com/read/28506888/calcium-sensing-receptor-erk-signaling-promotes-odontoblastic-differentiation-of-human-dental-pulp-cells
#1
Hiroyuki Mizumachi, Shinichiro Yoshida, Atsushi Tomokiyo, Daigaku Hasegawa, Sayuri Hamano, Asuka Yuda, Hideki Sugii, Suguru Serita, Hiromi Mitarai, Katsuaki Koori, Nahisa Wada, Hidefumi Maeda
Activation of the G protein-coupled calcium-sensing receptor (CaSR) has crucial roles in skeletal development and bone turnover. Our recent study has identified a role for activated CaSR in the osteogenic differentiation of human periodontal ligament stem cells. Furthermore, odontoblasts residing inside the tooth pulp chamber play a central role in dentin formation. However, it remains unclear how CaSR activation affects the odontoblastic differentiation of human dental pulp cells (HDPCs). We have investigated the odontoblastic differentiation of HDPCs exposed to elevated levels of extracellular calcium (Ca) and strontium (Sr), and the contribution of CaSR and the L-type voltage-dependent calcium channel (L-VDCC) to this process...
May 12, 2017: Bone
https://www.readbyqxmd.com/read/28503150/dental-pulp-cells-isolated-from-teeth-with-superficial-caries-retain-an-inflammatory-phenotype-and-display-an-enhanced-matrix-mineralization-potential
#2
Hanaa Alkharobi, James Beattie, Josie Meade, Deirdre Devine, Reem El-Gendy
We have isolated dental pulp cells (DPCs) from three healthy (hDPCs) and three carious (cDPCs) donors and shown that compared to hDPCs cells isolated from superficial carious lesions show higher clonogenic potential; show an equivalent proportion of cells with putative stem cell surface markers; show enhanced matrix mineralization capability; have enhanced angiogenic marker expression and retain the inflammatory phenotype in vitro characteristic of superficial caries lesions in vivo. Our findings suggest that cDPCs may be used for further investigation of the cross talk between inflammatory, angiogenic and mineralization pathways in repair of carious pulp...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28500952/isolation-and-characterization-of-lymphoid-enhancer-factor-1-positive-deciduous-dental-pulp-stem-like-cells-after-transfection-with-a-piggybac-vector-containing-lef1-promoter-driven-selection-markers
#3
Tomoya Murakami, Issei Saitoh, Masahiro Sato, Emi Inada, Miki Soda, Masataka Oda, Hisanori Domon, Yoko Iwase, Tadashi Sawami, Kazunari Matsueda, Yutaka Terao, Hayato Ohshima, Hirofumi Noguchi, Haruaki Hayasaki
OBJECTIVE: Lymphoid enhancer-binding factor-1 (LEF1) is a 48-kD nuclear protein that is expressed in pre-B and T cells. LEF1 is also an important member of the Wnt/β-catenin signaling pathway that plays important roles in the self-renewal and differentiation of embryonic stem cells. We speculated that LEF1 might function in the stem cells from human exfoliated deciduous teeth (SHED). In this study, we attempted to isolate such LEF1-positive cells from human deciduous dental pulp cells (HDDPCs) by genetic engineering technology, using the human LEF1 promoter...
May 7, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28498451/differential-effects-of-p38-and-erk1-2-on-the-chondrogenic-and-osteogenic-differentiation-of-dental-pulp-stem-cells
#4
Pengfei Ba, Xiaoyu Duan, Guo Fu, Shuyan Lv, Pishan Yang, Qinfeng Sun
The extracellular signal-regulated protein kinase 1/2 (Erk1/2) and p38 mitogen‑activated protein‑kinase pathways serve important roles in the regulation of osteogenic and chondrogenic differentiation in mesenchymal stem cells (MSCs). However, the exact mechanism remains unclear, and the effect is controversial. In the present study, the effects of Erk1/2 and p38 on the osteogenic and chondrogenic differentiation of dental pulp stem cells (DPSCs) were compared in vitro. The results indicated that inhibition of Erk1/2 is able to enhance the osteogenic differentiation of DPSCs and inhibit chondrogenic differentiation, whereas inhibition of p38 demonstrated the opposite effect...
May 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28496518/cytotoxicity-of-selected-nanoparticles-on-human-dental-pulp-stem-cells
#5
Kasra Tabari, Sepanta Hosseinpour, Peter Parashos, Parisa Kardouni Khozestani, Hossein Mohammad Rahimi
INTRODUCTION: Nanoparticles are being increasingly applied in dentistry due to their antimicrobial and mechanical properties. This in vitro study aimed to assess and compare the cytotoxicity of four metal oxide nanoparticles (TiO2, SiO2, ZnO, and Al2O3) on human dental pulp stem cells. METHODS AND MATERIALS: Four suspension with different concentrations (25, 50, 75, 100 µg/mL) of each nanoparticle were prepared and placed into cavities of three 96-well plates (containing 1×10(4) cells per well that were seeded 24 earlier)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28494644/the-alpha-7-nicotinic-acetylcholine-receptor-of-deciduous-dental-pulp-stem-cells-regulates-osteoclastogenesis-during-physiological-root-resorption
#6
Lulu Wang, Zhifei Zhou, Yujiang Chen, Shuai Yuan, Yang Du, Xinke Ju, Lizheng Wu, Xiaojing Wang
The physiological root resorption of deciduous teeth is a normal phenomenon, but the mechanisms underlying this process are still unclear. In this study, deciduous dental pulp stem cells (DDPSCs) and permanent dental pulp stem cells (DPSCs) were derived from deciduous teeth and normal permanent teeth at different stages of resorption. In the middle stage of root resorption, DDPSCs exhibited an increase in the ability to induce osteoclast differentiation. Activation of the alpha 7 nicotinic acetylcholine receptor (α7 nAChR) by secretory mammalian Ly-6 urokinase-type plasminogen activator receptor-associated protein 1 (SLURP-1) caused a significant increase in the expression levels of NF-κB, RANKL and the ratio of RANKL/OPG...
May 11, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28491933/wnt-and-bmp-signaling-crosstalk-in-regulating-dental-stem-cells-implications-in-dental-tissue-engineering
#7
Fugui Zhang, Jinglin Song, Hongmei Zhang, Enyi Huang, Dongzhe Song, Viktor Tollemar, Jing Wang, Jinhua Wang, Maryam Mohammed, Qiang Wei, Jiaming Fan, Junyi Liao, Yulong Zou, Feng Liu, Xue Hu, Xiangyang Qu, Liqun Chen, Xinyi Yu, Hue H Luu, Michael J Lee, Tong-Chuan He, Ping Ji
Tooth is a complex hard tissue organ and consists of multiple cell types that are regulated by important signaling pathways such as Wnt and BMP signaling. Serious injuries and/or loss of tooth or periodontal tissues may significantly impact aesthetic appearance, essential oral functions and the quality of life. Regenerative dentistry holds great promise in treating oral/dental disorders. The past decade has witnessed a rapid expansion of our understanding of the biological features of dental stem cells, along with the signaling mechanisms governing stem cell self-renewal and differentiation...
December 2016: Genes & Diseases
https://www.readbyqxmd.com/read/28487958/effects-of-taz-on-human-dental-pulp-stem-cell-proliferation-and-migration
#8
Songbo Tian, Xiaochao Tian, Yanping Liu, Fusheng Dong, Jie Wang, Xuqian Liu, Zhiyong Zhang, Huizhen Chen
Transcriptional coactivator with PDZ‑binding motif (TAZ) acts as the key downstream regulatory target in the Hippo signaling pathway. TAZ overexpression has been reported to promote cellular proliferation and induce epithelial‑mesenchymal transition in human mammary epithelial cells. However, the effects of TAZ in the regulation of human dental pulp stem cell (hDPSC) proliferation and migration, as well as the molecular mechanisms underlying its actions, remain to be elucidated. The present study demonstrated that TAZ was expressed in hDPSCs...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28475038/resolving-stem-and-progenitor-cells-in-the-adult-mouse-incisor-through-gene-co-expression-analysis
#9
Kerstin Seidel, Pauline Marangoni, Cynthia Tang, Bahar Houshmand, Wen Du, Richard L Maas, Steven Murray, Michael C Oldham, Ophir D Klein
Investigations into stem cell-fueled renewal of an organ benefit from an inventory of cell type-specific markers and a deep understanding of the cellular diversity within stem cell niches. Using the adult mouse incisor as a model for a continuously renewing organ, we performed an unbiased analysis of gene co-expression relationships to identify modules of co-expressed genes that represent differentiated cells, transit-amplifying cells, and residents of stem cell niches. Through in vivo lineage tracing, we demonstrated the power of this approach by showing that co-expression module members Lrig1 and Igfbp5 define populations of incisor epithelial and mesenchymal stem cells...
May 5, 2017: ELife
https://www.readbyqxmd.com/read/28474536/comments-on-an-overview-of-protocols-for-the-neural-induction-of-dental-and-oral-stem-cells-in-vitro-article-in-tissue-engineering-part-b-heng-et-al-february-2016-doi-10-1089-ten-teb-2015-0488
#10
Orsolya Pall, Bela Varga Varga, Pierre-Yves Collart-Dutilleul, Csilla Gergely, Frédéric Cuisinier
We read with interest the review of Heng et al.(2016). The article summarizes a wide range of protocols about the in vitro neurodifferentiation of different dental and oral stem cells. Our research group is also interested in the study of neurogenic potential of dental pulp stem cells, so we were pleased to find such a detailed and comprehensive review about this topic. Unfortunately when reading carefully the article, we observed numerous errors regarding for example the quantity of the products in several protocols...
May 5, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/28469672/stemness-maintenance-properties-in-human-oral-stem-cells-after-long-term-passage
#11
Francesca Diomede, Thangavelu Soundara Rajan, Valentina Gatta, Marco D'Aurora, Ilaria Merciaro, Marco Marchisio, Aurelio Muttini, Sergio Caputi, Placido Bramanti, Emanuela Mazzon, Oriana Trubiani
Background. Neural crest-derived mesenchymal stem cells (MSCs) from human oral tissues possess immunomodulatory and regenerative properties and are emerging as a potential therapeutic tool to treat diverse diseases, such as multiple sclerosis, myocardial infarction, and connective tissue damages. In addition to cell-surface antigens, dental MSCs express embryonic stem cell markers as neural crest cells originate from the ectoderm layer. In vitro passages may eventually modify these embryonic marker expressions and other stemness properties, including proliferation...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28457960/highly-degradable-porous-melt-derived-bioactive-glass-foam-scaffolds-for-bone-regeneration
#12
Amy Nommeots-Nomm, Sheyda Labbaf, Aine Devlin, Naomi Todd, Hua Geng, Anu K Solanki, Hok Man Tang, Polytimi Perdika, Alessandra Pinna, Fatemeh Ejeian, Olga Tsigkou, Peter D Lee, Mohammad Hossein Nasr Esfahani, Christopher A Mitchell, Julian R Jones
A challenge in using bioactive melt-derived glass in bone regeneration is to produce scaffolds with interconnected pores while maintaining the amorphous nature of the glass and its associated bioactivity. Here we introduce a method for creating porous melt-derived bioactive glass foam scaffolds with low silica content and report in vitro and preliminary in vivo data. The gel-cast foaming process was adapted, employing temperature controlled gelation of gelatin, rather than the in situ acrylic polymerisation used previously...
April 27, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28457634/combined-effects-of-vascular-endothelial-growth-factor-and-bone-morphogenetic-protein-2-on-odonto-osteogenic-differentiation-of-human-dental-pulp-stem-cells-in%C3%A2-vitro
#13
Hacer Aksel, George T-J Huang
INTRODUCTION: The purpose of this study was to investigate whether combined and concerted delivery of vascular endothelial growth factor (VEGF) and bone morphogenetic protein 2 (BMP-2) enhances odonto/osteogenic differentiation of human dental pulp stem cells (DPSCs) in vitro. METHODS: Various concentrations of VEGF and/or BMP-2 with or without the presence of odonto/osteogenic medium (OM) were added into DPSC cultures for 21 days. The mineral formation in cultures was evaluated using alizarin red stain (ARS)...
April 27, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28457531/spatial-development-of-gingival-fibroblasts-and-dental-pulp-cells-effect-of-extracellular-matrix
#14
Gili Kaufman, Drago Skrtic
Cells sensing changes in their microenvironmental stiffness and composition alter their responses, accordingly. This study determines whether gingival fibroblasts (GFs) and dental pulp mesenchymal stem cells (DPMSCs) support the formation of continuous layers in vitro by mimicking the stiffness and protein composition of their native extracellular matrix (ECM). Immortalized cells were incubated with (i) 0-100% Matrigel-ECM (M-ECM) for 7-28d, and with (ii) collagen and fibrin matrices for 14d. Cultures were analyzed by phase-contrast, fluorescence and confocal microscopies...
April 10, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28456779/effect-of-long-term-culture-on-the-biological-and-morphological-characteristics-of-human-adipose-tissue-derived-stem-cells
#15
L Danisovic, L Oravcova, L Krajciova, Z Varchulova Novakova, M Bohac, I Varga, J Vojtassak
Mesenchymal stem cells (MSCs) are multipotent cells that can be obtained from different tissues, including bone marrow, adipose tissue, umbilical blood, Wharton's jelly, and dental pulp. Due to their differentiation potential, regenerative and immunosuppressive properties, as well as ability to expand under in vitro conditions, these cells represent a promising therapeutic tool for regenerative medicine. However, the basic prerequisite for the therapeutic utilization of MSCs is obtaining a sufficient amount...
February 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28442664/induction-of-neural-crest-cells-from-human-dental-pulp-derived-induced-pluripotent-stem-cells
#16
Eisuke Kawano, Taku Toriumi, Shinya Iguchi, Daigo Suzuki, Shuichi Sato, Masaki Honda
We previously generated induced pluripotent stem (iPS) cells from human dental pulp cells of deciduous teeth. Neural crest cells (NCCs) play a vital role in the development of the oral and maxillofacial region. Therefore, NCCs represent a cell source for bone, cartilage, and tooth-related tissue engineering. In this study, we examined whether iPS cells are capable of differentiating into NCCs through modification of the human embryonic stem cell protocol. First, iPS cells were dissociated into single cells and then reaggregated in low-cell-adhesion plates with neural induction medium for 8 days in suspension culture to form neurospheres...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28427322/dental-pulp-pluripotent-like-stem-cells-dppsc-a-new-stem-cell-population-with-chromosomal-stability-and-osteogenic-capacity-for-biomaterials-evaluation
#17
Raquel Núñez-Toldrà, Ester Martínez-Sarrà, Carlos Gil-Recio, Miguel Ángel Carrasco, Ashraf Al Madhoun, Sheyla Montori, Maher Atari
BACKGROUND: Biomaterials are widely used to regenerate or substitute bone tissue. In order to evaluate their potential use for clinical applications, these need to be tested and evaluated in vitro with cell culture models. Frequently, immortalized osteoblastic cell lines are used in these studies. However, their uncontrolled proliferation rate, phenotypic changes or aberrations in mitotic processes limits their use in long-term investigations. Recently, we described a new pluripotent-like subpopulation of dental pulp stem cells derived from the third molars (DPPSC) that shows genetic stability and shares some pluripotent characteristics with embryonic stem cells...
April 21, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28416308/implantation-of-endothelial-cells-with-mesenchymal-stem-cells-accelerates-dental-pulp-tissue-regeneration-healing-in-pulpotomized-rat-molars
#18
Yukiko Sueyama, Tomoatsu Kaneko, Takafumi Ito, Reika Kaneko, Takashi Okiji
INTRODUCTION: This study aimed to examine whether the implantation of mesenchymal stem cells (MSCs) with endothelial cells (ECs) accelerates pulp tissue regeneration/healing and induces dentin bridge formation in a rat model of molar coronal pulp regeneration. METHODS: The maxillary first molars of Wistar rats were subjected to pulpotomy. Then, pulp chambers were implanted with biodegradable hydrogel-made scaffolds carrying MSCs together or without dermal microvascular ECs, and the cavities were sealed with mineral trioxide aggregate...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28412509/a-monoclonal-antibody-recognizes-undifferentiation-specific-carbohydrate-moieties-expressed-on-cell-surface-of-the-human-dental-pulp-cells
#19
Kyung-Jung Kang, Seon-Yle Ko, Chun-Jeih Ryu, Young-Joo Jang
Human dental pulp cells are obtained from dental pulp tissue, and have the ability to form dentin and a pulp-like complex. Although adult stem cells have been identified from the primary culture by using specific cell surface markers, the identity of surface markers for the purification of stem cells within the dental pulp population are still unclear. Previously, we had constructed monoclonal antibodies against the undifferentiated cell-specific surface markers of human dental pulp cells (hDPCs) by performing decoy immunization...
April 6, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28410532/role-of-p16-ink4a-and-bmi-1-in-oxidative-stress-induced-premature-senescence-in-human-dental-pulp-stem-cells
#20
Cristina Mas-Bargues, José Viña-Almunia, Marta Inglés, Jorge Sanz-Ros, Juan Gambini, José Santiago Ibáñez-Cabellos, José Luis García-Giménez, José Viña, Consuelo Borrás
Human dental pulp stem cells (hDPSCs) are a source for cell therapy. Before implantation, an in vitro expansion step is necessary, with the inconvenience that hDPSCs undergo senescence following a certain number of passages, loosing their stemness properties. Long-term in vitro culture of hDPSCs at 21% (ambient oxygen tension) compared with 3-6% oxygen tension (physiological oxygen tension) caused an oxidative stress-related premature senescence, as evidenced by increased β-galactosidase activity and increased lysil oxidase expression, which is mediated by p16(INK4a) pathway...
April 7, 2017: Redox Biology
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