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https://www.readbyqxmd.com/read/28211068/dentine-matrix-proteins-isolation-and-effects-on-human-pulp-cells
#1
M Widbiller, A Eidt, S R Lindner, K-A Hiller, H Schweikl, W Buchalla, K M Galler
AIM: To establish a simplified and efficient protocol for the isolation and concentration of matrix proteins from human dentine, and to assess the effects of extracted dentine matrix proteins (eDMP) on the behavior of human pulp cells. METHODOLOGY: Matrix proteins were isolated from human dentine, purified, concentrated and characterized with protein and enzyme-linked immunosorbent assays. Culture media were supplemented with eDMP in different concentrations, referred to as eDMP 1 to 10,000, to assess viability and proliferation of human pulp cells by DNA and MTT assays; apoptotic events were quantified by flow cytometry...
February 17, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28210430/growth-kinetics-and-characterization-of-human-dental-pulp-stem-cells-comparison-between-third-molar-and-first-premolar-teeth
#2
Davood Mehrabani, Parisa Mahdiyar, Kianoosh Torabi, Reza Robati, Shahrokh Zare, Mehdi Dianatpour, Amin Tamadon
BACKGROUND: Dental pulp stem cells (DPSCs) play an important role in tissue regeneration. This study compares the growth kinetics and characterization of third molar and first premolar human DPSCs. MATERIAL AND METHODS: Dental pulp tissues were isolated from human first premolar and third molar teeth and were digested by treating them with collagenase type I. Single-cell suspensions from each dental pulp were seeded in T25 culture flasks and the media were replaced every 3 days until 70% confluence...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28209631/hdpscs-fabricate-a-vascularised-woven-bone-tissue-a-new-tool-in-bone-tissue-engineering
#3
Francesca Paino, Marcella La Noce, Alessandra Giuliani, Alfredo De Rosa, Serena Mazzoni, Luigi Laino, Evzen Amler, Gianpaolo Papaccio, Vincenzo Desiderio, Virginia Tirino
Human dental pulp stem cells (hDPSCs) are mesenchymal stem cells successfully used in human bone tissue engineering. To better establish if these cells can lead to a bone tissue ready to be grafted, we checked DPSCs for their osteogenic and angiogenic differentiation capabilities with the specific aim to obtain a new tool for bone transplantation. Therefore, hDPSCs were specifically selected from the stromal-vascular dental pulp fraction, using appropriate markers and cultured. Growth curves, expression of bone-related markers, calcification, angiogenesis as well as in vivo transplantation assay were performed...
February 16, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28206897/retrospective-study-of-the-survival-rates-of-indirect-pulp-therapy-versus-different-pulpotomy-medicaments
#4
Patrice Barsamian Wunsch, Marissa M Kuhnen, Al M Best, Tegwyn H Brickhouse
PURPOSE: The purposes of this retrospective chart review were to determine: (1) how primary molars in need of vital pulp therapy (VPT) have been treated over a period of four years at a university-based pediatric dental practice (UBP); and which treatments-indirect pulp therapy (IPT), formocresol pulpotomy (FCP), and ferric sulfate pulpotomy (FSP)-have been successful. METHODS: Electronic patient records (axiUm) that contained the procedure codes D3120 (pulp cap-indirect) or D3220 (therapeutic pulpotomy) were totaled by year...
October 15, 2016: Pediatric Dentistry
https://www.readbyqxmd.com/read/28205268/the-effect-of-delta-like-1-homologue-on-the-proliferation-and-odontoblastic-differentiation-in-human-dental-pulp-stem-cells
#5
Shengcai Qi, Yanhong Yan, Yue Wen, Jialiang Li, Jing Wang, Fubo Chen, Xiaoshan Tang, Guangwei Shang, Yuanzhi Xu, Raorao Wang
INTRODUCTION: This study aimed to investigate the functions of delta-like homologue 1 (DLK1) in the proliferation and differentiation of human dental pulp stem cells (hDPSCs). METHODS: Immunohistochemical analysis was used to determine the expression of alkaline phosphatase (ALP), dentin sialophosphoprotein (DSPP), DLK1, NOTCH1 and p-ERK1/2 in the mouse first maxillary molar. Recombinant lentivirus was constructed to overexpress DLK1 stably in hDPSCs. The cell viability and proliferation of hDPSCs were examined by CCK8 and EdU incorporation assay respectively...
February 15, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28198096/treated-dentin-matrix-paste-as-a-novel-pulp-capping-agent-for-dentin-regeneration
#6
Jinlong Chen, Caiyun Cui, Xiangchen Qiao, Bo Yang, Mei Yu, Weihua Guo, Weidong Tian
Regenerating dentin and preserving pulp vitality are the two key targets for the treatment of dental pulp exposure. Calcium hydroxide (CH), the widely used capping agent, may induce potential tunnel defect in reparative dentin and cause inflammation or even necrosis in pulp tissues. This study aimed to produce a novel pulp capping agent with better bioactivities. Treated dentin matrix (TDM) paste (TDMP) was fabricated consisting of TDM powder and aqueous TDM extract. The chemical and biological characteristics of TDMP were investigated, and its effect on the odontogenic differentiation of dental pulp stem cells explored at gene and protein level; the therapeutic effect for pulp exposure in miniature swine was further verified...
February 15, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28196330/decellularized-human-dental-pulp-as-a-scaffold-for-regenerative-endodontics
#7
J S Song, K Takimoto, M Jeon, J Vadakekalam, N B Ruparel, A Diogenes
Teeth undergo postnatal organogenesis relatively late in life and only complete full maturation a few years after the crown first erupts in the oral cavity. At this stage, development can be arrested if the tooth organ is damaged by either trauma or caries. Regenerative endodontic procedures (REPs) are a treatment alternative to conventional root canal treatment for immature teeth. These procedures rely on the transfer of apically positioned stem cells, including stem cells of the apical papilla (SCAP), into the root canal system...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28194098/spatiotemporal-profiles-of-proprioception-processed-by-the-masseter-muscle-spindles-in-rat-cerebral-cortex-an-optical-imaging-study
#8
Satoshi Fujita, Mari Kaneko, Hiroko Nakamura, Masayuki Kobayashi
Muscle spindles in the jaw-closing muscles, which are innervated by trigeminal mesencephalic neurons (MesV neurons), control the strength of occlusion and the position of the mandible. The mechanisms underlying cortical processing of proprioceptive information are critical to understanding how sensory information from the masticatory muscles regulates orofacial motor function. However, these mechanisms are mostly unknown. The present study aimed to identify the regions that process proprioception of the jaw-closing muscles using in vivo optical imaging with a voltage-sensitive dye in rats under urethane anesthesia...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28190584/the-effects-of-m1-and-m2-macrophages-on-odontogenic-differentiation-of-human-dental-pulp-cells
#9
Hee Chul Park, Hongxuan Quan, Tingting Zhu, Yongjoon Kim, Bongju Kim, Hyeong-Cheol Yang
INTRODUCTION: M1 (classically activated) and M2 (alternatively activated) macrophages are known to play primary roles in inflammation and tissue regeneration. To investigate the role of macrophages in dentin regeneration, this study examined the effects of M1 and M2 macrophages on the odontogenic/osteogenic differentiation of human dental pulp cells (HDPCs) using the conditioned media (CM) of the activated human monocyte cell line THP-1. METHODS: M1 and M2 macrophages were induced by lipopolysaccharide/interferon-γ and interleukin-4, respectively, and the phenotypes were confirmed by flow cytometry...
February 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28188902/dental-pulp-as-a-source-of-low-contaminated-dna
#10
Michel Drancourt, Gérard Aboudharam, Olivier Croce, Fabrice Armougom, Catherine Robert, Didier Raoult
The in-laboratory contamination of the ancient samples hinders the result interpretation of the investigations in the field of paleomicrobiology. We had promoted the dental pulp as a sample that limits the risks of in-laboratory contamination of the ancient material. In this work, we measured the contamination of the dental pulp manipulated according to paleomicrobiology protocol, used as a source of a total DNA for metagenomics. First, total DNA extracted from two dog canines was sequenced using next generation sequencing...
February 8, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28179933/role-of-cd146-enrichment-in-purification-of-stem-cells-derived-from-dental-pulp-polyp
#11
Maryam Sadat Tavangar, Seyed-Mojtaba Hosseini, Ali Dehghani-Nazhvani, Ahmad Monabati
INTRODUCTION: Hyperplastic pulpitis (pulp polyp) tissues contains cells with stem cell properties similar to that of the dental pulp stem cells (DPSCs). It has also been shown that CD146 enrichment can homogenize the cultures of DPSCs and enhance the colony forming potentials of their cultures. This study determines whether CD146 enrichment can help purifying the stem cells from heterogeneous cultures of the pulp polyp derived stem cells (PPSCs). METHODS AND MATERIALS: Healthy dental pulps and pulp polyp tissues were enzymatically digested and the harvested single cells were sorted according to the presence of CD146 marker...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28179918/correlation-between-histological-status-of-the-pulp-and-its-response-to-sensibility-tests
#12
Mandana Naseri, Akbar Khayat, Sara Zamaheni, Shiva Shojaeian
INTRODUCTION: The purpose of this study was to assess the accuracy of sensibility tests by correlating it with histologic pulp condition. METHODS AND MATERIALS: Assessment of clinical signs and symptoms were performed on 65 permanent teeth that were scheduled to be extracted for periodontal, prosthodontic or orthodontic reasons. The normal pulp and reversible pulpitis were considered as treatable tooth conditions while irreversible pulpitis and necrosis were considered as untreatable conditions...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28177588/a-retrospective-study-of-isolated-fractures-of-the-alveolar-process-in-the-permanent-dentition
#13
Maja Marotti, Kurt Alois Ebeleseder, Gerold Schwantzer, Stefanie Jauk
BACKGROUND/AIM: There is a lack of studies of fractures of the alveolar process (FAP). Only five were published in the last fifty years. The aim of this study was to analyze the risk of pulp necrosis and infection (PN), pulp canal obliteration (PCO), infection-related root resorption (IRR), ankylosis-related resorption (ARR), marginal bone loss (MBL), and tooth loss (TL) as well as to identify the possible risk factors for teeth involved in an isolated alveolar process fracture. In the second part, any late complications of the involved teeth were reported in patients who responded to a follow-up examination...
February 8, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28164460/development-and-application-of-led-arrays-for-use-in-phototherapy-research
#14
Mohammed A Hadis, Paul R Cooper, Michael R Milward, Patricia C Gorecki, Edward Tarte, James Churm, William M Palin
Lasers/LEDs demonstrate therapeutic effects for a range of biomedical applications. However, a consensus on effective light irradiation parameters and efficient and reliable measurement techniques remain limited. The objective here is to develop, characterise and demonstrate the application of LED arrays in order to progress and improve the effectiveness and accuracy of in vitro photobiomodulation studies. 96-well plate format LED arrays (400-850 nm) were developed and characterised to accurately assess irradiance delivery to cell cultures...
February 6, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28163685/ionotropic-p2x-atp-receptor-channels-mediate-purinergic-signaling-in-mouse-odontoblasts
#15
Yuta Shiozaki, Masaki Sato, Maki Kimura, Toru Sato, Masakazu Tazaki, Yoshiyuki Shibukawa
ATP modulates various functions in the dental pulp cells, such as intercellular communication and neurotransmission between odontoblasts and neurons, proliferation of dental pulp cells, and odontoblast differentiation. However, functional expression patterns and their biophysical properties of ionotropic ATP (P2X) receptors (P2X1-P2X7) in odontoblasts were still unclear. We examined these properties of P2X receptors in mouse odontoblasts by patch-clamp recordings. K(+)-ATP, nonselective P2X receptor agonist, induced inward currents in odontoblasts in a concentration-dependent manner...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28159719/improvement-of-osteogenesis-in-dental-pulp-pluripotent-like-stem-cells-by-oligopeptide-modified-poly-%C3%A3-amino-ester-s
#16
Raquel Núñez-Toldrà, Pere Dosta, Sheyla Montori, Víctor Ramos, Maher Atari, Salvador Borrós
: Controlling pluripotent stem cell differentiation via genetic manipulation is a promising technique in regenerative medicine. However, the lack of safe and efficient delivery vehicles limits this application. Recently, a new family of poly (β-amino ester)s (pBAEs) with oligopeptide-modified termini showing high transfection efficiency of both siRNA and DNA plasmid has been developed. In this study, oligopeptide-modified pBAEs were used to simultaneously deliver anti-OCT3/4 siRNA, anti-NANOG siRNA, and RUNX2 plasmid to cells from the dental pulp with pluripotent-like characteristics (DPPSC) in order to promote their osteogenic differentiation...
January 31, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28157689/differential-mineralization-of-human-dental-pulp-stem-cells-on-diverse-polymers
#17
Christian Apel, Patricia Buttler, Jochen Salber, Anandhan Dhanasingh, Sabine Neuss
In tissue engineering, biomaterials are used as scaffolds for spatial distribution of specific cell types. Biomaterials can potentially influence cell proliferation and extracellular matrix formation, both in positive and negative ways. The aim of the present study was to investigate and compare mineralized matrix production of human dental pulp stem cells (DPSC), cultured on 17 different well-characterized polymers. Osteogenic differentiation of DPSC was induced for 21 days on biomaterials using dexamethasone, L-ascorbic-acid-2-phosphate, and sodium β-glycerophosphate...
February 3, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28151902/clinical-pathological-and-genetic-evaluations-of-chinese-patient-with-otodental-syndrome-and-multiple-complex-odontoma-case-report
#18
Anqi Liu, Meiling Wu, Xiaohe Guo, Hao Guo, Zhifei Zhou, Kewen Wei, Kun Xuan
Otodental syndrome is a rare autosomal-dominant disease characterized by globodontia, associated with sensorineural, high-frequency hearing loss. Here, we describe the clinical, pathological, and genetic evaluations of a 9-year-old girl with otodental syndrome and multiple complex odontoma.The patient presented with a draining sinus tract in her left cheek, globodontia, and hearing loss. The odontomas which caused the cutaneous sinus tracts were extracted because of the odontogenic infection. The extracted odontoma and primary tooth was studied by micro-CT and further observed histopathologically...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28150746/rapid-cell-separation-with-minimal-manipulation-for-autologous-cell-therapies
#19
Alban J Smith, Richard D O'Rorke, Akshay Kale, Roberts Rimsa, Matthew J Tomlinson, Jennifer Kirkham, A Giles Davies, Christoph Wälti, Christopher D Wood
The ability to isolate specific, viable cell populations from mixed ensembles with minimal manipulation and within intra-operative time would provide significant advantages for autologous, cell-based therapies in regenerative medicine. Current cell-enrichment technologies are either slow, lack specificity and/or require labelling. Thus a rapid, label-free separation technology that does not affect cell functionality, viability or phenotype is highly desirable. Here, we demonstrate separation of viable from non-viable human stromal cells using remote dielectrophoresis, in which an electric field is coupled into a microfluidic channel using shear-horizontal surface acoustic waves, producing an array of virtual electrodes within the channel...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28148303/variation-in-human-dental-pulp-stem-cell-ageing-profiles-reflect-contrasting-proliferative-and-regenerative-capabilities
#20
Amr Alraies, Nadia Y A Alaidaroos, Rachel J Waddington, Ryan Moseley, Alastair J Sloan
BACKGROUND: Dental pulp stem cells (DPSCs) are increasingly being recognized as a viable cell source for regenerative medicine. Although significant variations in their ex vivo expansion are well-established, DPSC proliferative heterogeneity remains poorly understood, despite such characteristics influencing their regenerative and therapeutic potential. This study assessed clonal human DPSC regenerative potential and the impact of cellular senescence on these responses, to better understand DPSC functional behaviour...
February 2, 2017: BMC Cell Biology
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