scholarly journals Immunohistochemical study of dental pulp cells with 3D collagen type I gel in demineralized dentin tubules in vivo

2020 ◽  
Author(s):  
Sultan Zeb Khan ◽  
Sana Mirza ◽  
Samina Karim ◽  
Takashi Inoue ◽  
Mohammed S. Bin-Shuwaish ◽  
...  
Keyword(s):  
Body Weight ◽  
Dental Pulp ◽  
Collagen Gel ◽  
Male Rats ◽  
Type I ◽  
Dental Pulp Cells ◽  
Pulp Cells ◽  
Dentin Tubules ◽  
Demineralized Dentin

Dental pulp cells (DPCs) represent good candidates for the regeneration of dental tissue. This study aimed to evaluate the growth and differentiation potential of DPCs cultured inside demineralized dentin tubules in vivo. Six green fluorescent protein (GFP)-transgenic rats (body weight 100 g each) and thirty-two Sprague-Dawley (SD) male rats (body weight 250 g each) were used for DPC collection and dentin tubules preparation and transplantation, respectively. Third-passage DPCs with or without collagen gels were loaded into demineralized dentin tubules. Both types of grafts were transplanted into the rectus abdominis muscles of SD rats and were harvested after 21 days. The expression of alkaline phosphatase (ALP), bone sialoprotein (BSP), osteopontin (OPN), nestin, and dentin sialoprotein (DSP) were analyzed by immunohistochemistry. Histological analysis showed that DPCs in the collagen gel formed an osteodentin-like hard tissue matrix after 21 days. Increased positive immunoreactivity for ALP, BSP, OPN, nestin, and DSP was observed in experimental groups compared with control. Our results demonstrate that DPCs in collagen gel inside demineralized dentin tubules show increased growth and differentiation.

scholarly journals Effects of different aperture-sized type I collagen/silk fibroin scaffolds on the proliferation and differentiation of human dental pulp cells

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Shihui Jiang ◽  
Zhaoxia Yu ◽  
Lanrui Zhang ◽  
Guanhua Wang ◽  
Xiaohua Dai ◽  
...  
Keyword(s):  
Silk Fibroin ◽  
Dental Pulp ◽  
Type I Collagen ◽  
Type I ◽  
Dental Pulp Cells ◽  
Human Dental Pulp Cells ◽  
Alp Activity ◽  
Proliferation And Differentiation ◽  
Human Dental Pulp ◽  
Pulp Cells

Abstract This study aimed at evaluate the effects of different aperture-sized type I collagen/silk fibroin (CSF) scaffolds on the proliferation and differentiation of human dental pulp cells (HDPCs). The CSF scaffolds were designed with 3D mapping software Solidworks. Three different aperture-sized scaffolds (CSF1–CSF3) were prepared by low-temperature deposition 3D printing technology. The morphology was observed by scanning electron microscope (SEM) and optical coherence tomography. The porosity, hydrophilicity and mechanical capacity of the scaffold were detected, respectively. HDPCs (third passage, 1 × 105 cells) were seeded into each scaffold and investigated by SEM, CCK-8, alkaline phosphatase (ALP) activity and HE staining. The CSF scaffolds had porous structures with macropores and micropores. The macropore size of CSF1 to CSF3 was 421 ± 27 μm, 579 ± 36 μm and 707 ± 43 μm, respectively. The porosity was 69.8 ± 2.2%, 80.1 ± 2.8% and 86.5 ± 3.3%, respectively. All these scaffolds enhanced the adhesion and proliferation of HDPCs. The ALP activity in the CSF1 group was higher than that in the CSF3 groups (P < 0.01). HE staining showed HDPCs grew in multilayer within the scaffolds. CSF scaffolds significantly improved the adhesion and ALP activity of HDPCs. CSF scaffolds were promising candidates in dentine-pulp complex regeneration.

TheHOX genes are expressed, in vivo, in human tooth germs: In vitro cAMP exposure of dental pulp cells results in parallel HOX network activation and neuronal differentiation

2006 ◽  
Vol 97 (4) ◽  
pp. 836-848 ◽  
Author(s):  
Vincenzo D'Antò ◽  
Monica Cantile ◽  
Maria D'Armiento ◽  
Giulia Schiavo ◽  
Gianrico Spagnuolo ◽  
...  
Keyword(s):  
Neuronal Differentiation ◽  
Dental Pulp ◽  
Human Tooth ◽  
Dental Pulp Cells ◽  
Network Activation ◽  
Pulp Cells ◽  
Tooth Germs

scholarly journals Runx3 negatively regulates Osterix expression in dental pulp cells

2007 ◽  
Vol 405 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Li Zheng ◽  
Koichiro Iohara ◽  
Masaki Ishikawa ◽  
Takeshi Into ◽  
Teruko Takano-Yamamoto ◽  
...  
Keyword(s):  
Transcriptional Regulation ◽  
Dental Pulp ◽  
Tooth Development ◽  
Tooth Germ ◽  
Dental Pulp Cells ◽  
Mobility Shift ◽  
Pulp Cells ◽  
Mobility Shift Assay ◽  
Responsive Element

Osterix, a zinc-finger-containing transcription factor, is required for osteoblast differentiation and bone formation. Osterix is also expressed in dental mesenchymal cells of the tooth germ. However, transcriptional regulation by Osterix in tooth development is not clear. Genetic studies in osteogenesis place Osterix downstream of Runx2 (Runt-related 2). The expression of Osterix in odontoblasts overlaps with Runx3 during terminal differentiation in vivo. Runx3 down-regulates Osterix expression in mouse DPCs (dental pulp cells). Therefore the regulatory role of Runx3 on Osterix expression in tooth development was investigated. Enforced expression of Runx3 down-regulated the activity of the Osterix promoter in the human embryonic kidney 293 cell line. When the Runx3 responsive element on the Osterix promoter, located at −713 to −707 bp (site 3, AGTGGTT) relative to the cap site, was mutated, this down-regulation was abrogated. Furthermore, electrophoretic mobility-shift assay and chromatin immunoprecipitation assays in mouse DPCs demonstrated direct functional binding of Runx3 to the Osterix promoter. These results demonstrate the transcriptional regulation of Osterix expression by Runx3 during differentiation of dental pulp cells into odontoblasts during tooth development.

Type I collagen regulated dentin matrix protein-1 (Dmp-1) and osteocalcin (OCN) gene expression of rat dental pulp cells

2003 ◽  
Vol 88 (6) ◽  
pp. 1112-1119 ◽  
Author(s):  
Morimichi Mizuno ◽  
Tetsuro Miyamoto ◽  
Keinoshin Wada ◽  
Sanae Watatani ◽  
Gui Xia Zhang
Keyword(s):  
Gene Expression ◽  
Dental Pulp ◽  
Matrix Protein ◽  
Type I Collagen ◽  
Type I ◽  
Dental Pulp Cells ◽  
Dentin Matrix Protein 1 ◽  
Dentin Matrix Protein ◽  
Pulp Cells ◽  
Dentin Matrix

scholarly journals Visfatin Induces Senescence of Human Dental Pulp Cells

Cells ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 193 ◽  
Author(s):  
Chang Youp Ok ◽  
Sera Park ◽  
Hye-Ock Jang ◽  
Takashi Takata ◽  
Moon-Kyoung Bae ◽  
...  
Keyword(s):  
Dental Pulp ◽  
Dental Pulp Cells ◽  
Human Dental Pulp Cells ◽  
Human Dental Pulp ◽  
Pulp Cells ◽  
Secretory Phenotype ◽  
Interfering Rna ◽  
First Time

Dental pulp plays an important role in the health of teeth. The aging of teeth is strongly related to the senescence of dental pulp cells. A novel adipokine, visfatin, is closely associated with cellular senescence. However, little is known about the effect of visfatin on the senescence of human dental pulp cells (hDPCs). Here, it was found that in vivo visfatin levels in human dental pulp tissues increase with age and are upregulated in vitro in hDPCs during premature senescence activated by H2O2, suggesting a correlation between visfatin and senescence. In addition, visfatin knockdown by small interfering RNA led to the reduction in hDPC senescence; however, treatment with exogenous visfatin protein induced the senescence of hDPCs along with increased NADPH consumption, which was reversed by FK866, a chemical inhibitor of visfatin. Furthermore, visfatin-induced senescence was associated with both the induction of telomere damage and the upregulation of senescence-associated secretory phenotype (SASP) factors as well as NF-κB activation, which were all inhibited by FK866. Taken together, these results demonstrate, for the first time, that visfatin plays a pivotal role in hDPC senescence in association with telomere dysfunction and the induction of SASP factors.

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