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Ashraf H, Zargar N, Zandi B, Azizi A, Amiri M. The Evaluation of Debris and Smear Layer Generated by Three Rotary Instruments Neo NiTi, 2Shape and Revo_S: An Ex-vivo Scanning Electron Microscopic Study. IRANIAN ENDODONTIC JOURNAL 2023; 18:96-103. [PMID: 37152856 PMCID: PMC10155103 DOI: 10.22037/iej.v18i2.39966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 02/09/2023] [Accepted: 03/15/2023] [Indexed: 05/09/2023]
Abstract
Introduction This study compared the cleaning effectiveness of NeoNiTi, 2Shape and Revo_S rotary instruments. Materials and Methods Fifty mandibular molar mesial roots were selected with an angle of curvature less than 20 degrees divided into three groups (n=15). Five samples were selected as negative control group. In all three systems, the final file was 25, 6%. The score of debris and smear layer in three thirds (coronal, middle and apical) of the root canal walls were evaluated using scanning electron microscopic (SEM) magnification. The data were analyzed using the Kruskal Wallis and Mann Whitney U tests for intergroup comparison (P≤0.05) and Freidman and Wilcoxon signed-rank test was employed for intragroup comparison (P≤0.05). Results Residual debris of the 2Shape system in the apical region was significantly higher than the other two systems (P=0.039). Revo_S and 2Shape groups had significantly higher quantities of debris in the apical than the coronal region (P=0.029 and P=0.02, respectively). In the 2Shape group, the amount of mid-region debris was significantly higher (P=0.005) than the coronal. In inter-group comparison there was no significant difference in residual smear layer between the systems. In intra-group comparison in all three systems, the amount of smear layer in the coronal third was significantly higher than in the other two areas. (P=0.017, P<0.001 and P=0.032, respectively). Conclusion 2Shape left the highest amount of debris in the apical region. The amount of debris in Revo_S and 2Shape groups in the apical region was significantly higher than in the coronal. The amount of smear layer in all three groups in the coronal area was higher than the middle and apical areas.
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Affiliation(s)
- Hengameh Ashraf
- Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
| | - Nazanin Zargar
- Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
| | - Babak Zandi
- Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
| | - Aytan Azizi
- Departmentof Endodontics, School of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Maryam Amiri
- Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
- Corresponding author: Maryam Amiri, School of Dentistry, Shahid Beheshti University of Medical sciences, Daneshju Blv, Evin Avenue, Chamran High Way, Postal code: 1983963113. E-mail:
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Khan AZ, Utheim TP, Jackson CJ, Tønseth KA, Eidet JR. Concise Review: Considering Optimal Temperature for Short-Term Storage of Epithelial Cells. Front Med (Lausanne) 2021; 8:686774. [PMID: 34485330 PMCID: PMC8416270 DOI: 10.3389/fmed.2021.686774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 07/08/2021] [Indexed: 11/23/2022] Open
Abstract
Transplantation of novel tissue-engineered products using cultured epithelial cells is gaining significant interest. While such treatments can readily be provided at centralized medical centers, delivery to patients at geographically remote locations requires the establishment of suitable storage protocols. One important aspect of storage technology is temperature. This paper reviews storage temperature for above-freezing point storage of human epithelial cells for regenerative medicine purposes. The literature search uncovered publications on epidermal cells, retinal pigment epithelial cells, conjunctival epithelial cells, corneal/limbal epithelial cells, oral keratinocytes, and seminiferous epithelial cells. The following general patterns were noted: (1) Several studies across different cell types inclined toward 4 and 16°C being suitable short-term storage temperatures. Correspondingly, almost all studies investigating 37°C concluded that this storage temperature was suboptimal. (2) Cell death typically escalates rapidly following 7–10 days of storage. (3) The importance of the type of storage medium and its composition was highlighted by some of the studies; however, the relative importance of storage medium vs. storage temperature has not been investigated systematically. Although a direct comparison between the included investigations is not reasonable due to differences in cell types, storage media, and storage duration, this review provides an overview, summarizing the work carried out on each cell type during the past two decades.
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Affiliation(s)
- Ayyad Zartasht Khan
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway.,Department of Surgery, Sørlandet Hospital Arendal, Arendal, Norway.,Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Tor Paaske Utheim
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway.,Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway.,Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway.,Department of Ophthalmology, Stavanger University Hospital, Stavanger, Norway.,Department of Plastic and Reconstructive Surgery, Oslo University Hospital, Oslo, Norway.,Department of Ophthalmology, Oslo University Hospital, Oslo, Norway
| | - Catherine Joan Jackson
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway.,Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway.,Ifocus Eye Clinic, Haugesund, Norway
| | - Kim Alexander Tønseth
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Plastic and Reconstructive Surgery, Oslo University Hospital, Oslo, Norway
| | - Jon Roger Eidet
- Department of Ophthalmology, Oslo University Hospital, Oslo, Norway
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Xu Y, Yang XL, Yang XL, Ren YR, Zhuang XY, Zhang L, Zhang XF. Functional Annotations of Single-Nucleotide Polymorphism (SNP)-Based and Gene-Based Genome-Wide Association Studies Show Genes Affecting Keratitis Susceptibility. MEDICAL SCIENCE MONITOR : INTERNATIONAL MEDICAL JOURNAL OF EXPERIMENTAL AND CLINICAL RESEARCH 2020; 26:e922710. [PMID: 32450567 PMCID: PMC7269196 DOI: 10.12659/msm.922710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background Keratitis is a complex condition in humans and is the second most common cause of legal blindness worldwide. Material/Methods To reveal the genomic loci underlying keratitis, we performed functional annotations of SNP-based and gene-based genome-wide association studies of keratitis in the UK Biobank (UKB) cohort with 337 199 subjects of European ancestry. Results The publicly available SNP-based association results showed a total of 34 SNPs, from 14 distinct loci, associated with keratitis in the UKB. Gene-based association analysis identified 2 significant genes: IQCF3 (p=2.0×10−6) and SOD3 (p=2.0×10−6). Thirty-two candidate genes were then prioritized using information from multiple sources. The overlap of IQCF3 in these 2 analyses resulted in a total of 33 hub genes. Functional annotation of hub genes was performed and transcriptional factors of IQCF3 and SOD3 were predicted. Conclusions A total of 34 SNPs from 14 distinct loci were identified as being associated with keratitis, and 32 candidate genes were then prioritized. In addition, IQCF3 and SOD3 were identified by their p values through gene-based tests on the basis of individual SNP-based tests. The functional relationship between these suspect genes and keratitis suggest that IQCF3 and SOD3 are candidate genes underlying keratitis.
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Affiliation(s)
- Yue Xu
- Department of Ophthalmology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China (mainland)
| | - Xiao-Lin Yang
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China (mainland)
| | - Xiao-Long Yang
- Department of Ophthalmology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China (mainland)
| | - Ya-Ru Ren
- Department of Ophthalmology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China (mainland)
| | - Xin-Yu Zhuang
- Department of Ophthalmology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China (mainland)
| | - Lei Zhang
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China (mainland)
| | - Xiao-Feng Zhang
- Department of Ophthalmology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China (mainland)
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Liu L, Nielsen FM, Emmersen J, Bath C, Østergaard Hjortdal J, Riis S, Fink T, Pennisi CP, Zachar V. Pigmentation Is Associated with Stemness Hierarchy of Progenitor Cells Within Cultured Limbal Epithelial Cells. Stem Cells 2018; 36:1411-1420. [PMID: 29781179 DOI: 10.1002/stem.2857] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 04/26/2018] [Accepted: 05/07/2018] [Indexed: 12/15/2022]
Abstract
Ex vivo cultured human limbal epithelial stem/progenitor cells (hLESCs) are the main source for regenerative therapy of limbal stem cell deficiency (LSCD), which is worldwide one of the major causes of corneal blindness. Despite many stemness-associated markers have been identified within the limbal niche, the phenotype of the earliest hLESCs has not been hitherto identified. We sought to confirm or refute the use of tumor protein p63 (p63) and ATP binding cassette subfamily B member 5 (ABCB5) as surrogate markers for hLESCs early within the limbal differentiation hierarchy. Based on a robust fluorescence-activated cell sorting and subsequent RNA isolation protocol, a comprehensive transcriptomic profile was obtained from four subpopulations of cultured hLESCs. The subpopulations were defined by co-expression of two putative stem/progenitor markers, the p63 and ABCB5, and the corneal differentiation marker cytokeratin 3. A comparative transcriptomic analysis yielded novel data that indicated association between pigmentation and differentiation, with the p63 positive populations being the most pigmented and immature of the progenitors. In contrast, ABCB5, either alone or in co-expression patterns, identified more committed progenitor cells with less pigmentation. In conclusion, p63 is superior to ABCB5 as a marker for stemness. Stem Cells 2018;36:1411-1420.
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Affiliation(s)
- Lei Liu
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.,Department of Pediatric Surgery, First Hospital of Jilin University, Changchun, Jilin, People's Republic of China
| | - Frederik Mølgaard Nielsen
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Jeppe Emmersen
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Chris Bath
- Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark
| | | | - Simone Riis
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Trine Fink
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Cristian Pablo Pennisi
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Vladimir Zachar
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
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Preservation of Ocular Epithelial Limbal Stem Cells: The New Frontier in Regenerative Medicine. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 951:179-189. [DOI: 10.1007/978-3-319-45457-3_15] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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