Archives of oral biology最新文献

{"title":"Overexpression of programmed cell death ligand 1 reduces LPS-induced inflammatory cytokine upregulation and enhances osteo/odontogenic-differentiation of human dental pulp stem cells via upregulation of CCCTC-binding factor","authors":"Yinan Zhu ,&nbsp;Minmin Chen ,&nbsp;Fang Liu ,&nbsp;Buyun Li ,&nbsp;Yanwen He","doi":"10.1016/j.archoralbio.2024.106031","DOIUrl":"10.1016/j.archoralbio.2024.106031","url":null,"abstract":"<div><h3>Objective</h3><p>The aim of this study was to explore the effect and mechanism of programmed cell death ligand 1 (PD-L1) in promoting the proliferation and osteo/odontogenic-differentiation of human dental pulp stem cells (hDPSCs) by mediating CCCTC-binding factor (CTCF) expression.</p></div><div><h3>Design</h3><p>The interaction between PD-L1 and CTCF was verified through co-immunoprecipitation. hDPSCs transfected with PD-L1 overexpression and CTCF knockdown vectors were treated with lipopolysaccharide or an osteogenic-inducing medium. Inflammatory cytokines and osteo/odontogenic-differentiation related genes were measured. Osteo/odontogenic-differentiation of hDPSCs was assessed using alkaline phosphatase (ALP) and alizarin red S staining.</p></div><div><h3>Results</h3><p>Overexpression of PD-L1 inhibited LPS-induced pro-inflammatory cytokine upregulation, cell proliferation, ALP activity, and calcium deposition in hDPSCs and elevated the expression of osteo/odontogenic-differentiation related genes; however, such expression patterns could be reversed by CTCF knockdown. Co-immunoprecipitation results confirmed the binding of PD-L1 to CTCF, indicating that PD-L1 overexpression in hDPSCs increases CTCF expression, thus inhibiting the inflammatory response and increasing osteo/odontogenic-differentiation of hDPSCs.</p></div><div><h3>Conclusion</h3><p>PD-L1 overexpression in hDPSCs enhances the proliferation and osteo/odontogenic-differentiation of hDPSCs and inhibit the inflammatory response by upregulating CTCF expression.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141403443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Early onset of enamel formation in Baka pygmy’s deciduous canines","authors":"Elsa Sonkeng Tiwa ,&nbsp;Charles Muhima Pilipili ,&nbsp;Fernando V. Ramírez Rozzi","doi":"10.1016/j.archoralbio.2024.106030","DOIUrl":"10.1016/j.archoralbio.2024.106030","url":null,"abstract":"<div><h3>Objective</h3><p>Our aim was to evaluate by enamel microstructure analysis two hypotheses that would explain the early dental eruption in the Bakaparticularity, a shorter crown formation time and/or earlier onset of crown formation.</p></div><div><h3>Design</h3><p>Deciduous canines corresponds to the best teeth to perform the analysis of enamel microstructure. Longitudinal ground sections of 21 deciduous canines from 12 individuals were studied with transmitted light microscopy. Cross-striations, striaes of Retzius (SR) and the neonatal line (NNL) enable to establish the prenatal crown formation time (preCFT), the postnatal crown formation time (postCFT), the crown formation time (CFT) as well as the daily secretion rate (DSR) and the enamel extension rate (EER) and their variation along crown formation.</p></div><div><h3>Results</h3><p>The DSR and the EER in the Baka are similar than in other populations with an average DSR of 3.26 µm and EER of 18.18 µm. The preCFT was 154 days, the postCFT 265 days and CFT 419 days. Comparison with other population does not show difference in CFT. However, the preCFT and the postCFT differ, the first is higher and the second lower in the Baka than in other populations. Furthermore, the number of prenatal areas of enamel was greater in the Baka.</p></div><div><h3>Conclusion</h3><p>Our analysis suggests that the Baka does not distinguish by a different CFT but the onset of crown formation is earlier than in other groups. Therefore, the early dental eruption in the Baka results from an earlier onset of crown formation.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141398603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-species biofilm of Streptococcus mutans and Candida albicans produces subsurface caries lesions on bovine enamel","authors":"Jéssica Silva Santana ,&nbsp;Alberto Carlos Botazzo Delbem ,&nbsp;Juliano Pelim Pessan ,&nbsp;Caio Sampaio ,&nbsp;Leonardo Antônio de Morais ,&nbsp;Taynara Leandro Pereira ,&nbsp;Douglas Roberto Monteiro ,&nbsp;Thayse Yumi Hosida","doi":"10.1016/j.archoralbio.2024.106029","DOIUrl":"10.1016/j.archoralbio.2024.106029","url":null,"abstract":"<div><h3>Objectives</h3><p>To develop a protocol for forming subsurface caries lesions on bovine enamel by dual-species biofilms of <em>Streptococcus mutans</em> and <em>Candida albicans in vitro</em>.</p></div><div><h3>Design</h3><p>Biofilms were grown on bovine enamel specimens in artificial saliva (AS) for seven days. After 24 h of formation, the AS was supplemented or not with fluoride (F) using sodium fluoride (0.005 or 0.008 ppm F), and the biofilms were exposed or not to a 20 % sucrose solution (reproducing a cariogenic challenge) once/day. On the seventh day, the biofilms were harvested and had their extracellular polysaccharides (EPS) and inorganic components analyzed. The specimens were subjected to computed X-ray microtomography analysis to determine their mineral concentration. Data were compared using two-way analyses of variance, followed by Fisher’s LSD or Student–Newman–Keuls tests (<em>p</em> &lt; 0.05).</p></div><div><h3>Results</h3><p>Biofilms exposed to the cariogenic challenge had significantly higher EPS concentrations than those not exposed, regardless of the presence of F. For biofilms grown with 0.008 ppm F, those exposed to the cariogenic challenge had lower F levels than those not exposed. For biofilms exposed to the cariogenic challenge, those grown with 0.008 ppm F had lower lesion depths and integrated mineral loss, and higher outer layers than those grown without F.</p></div><div><h3>Conclusions</h3><p>The dual biofilm model assessed was able to create subsurface caries lesions in bovine enamel <em>in vitro</em>, which was influenced by the presence of F in the culture medium and exposure to sucrose.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141400919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Roles of the histone methyltransferase SET domain bifurcated 1 in epithelial cells during tooth development","authors":"Yuri Takagiwa,&nbsp;Norihisa Higashihori,&nbsp;Sakurako Kano,&nbsp;Keiji Moriyama","doi":"10.1016/j.archoralbio.2024.106026","DOIUrl":"10.1016/j.archoralbio.2024.106026","url":null,"abstract":"<div><h3>Objective</h3><p>This study aimed to reveal the effects of SET domain bifurcated 1 (SETDB1) on epithelial cells during tooth development.</p></div><div><h3>Design</h3><p>We generated conditional knockout mice (<em>Setdb1</em> ^{<em>fl/fl,Keratin14</em>-Cre+} mice), in which <em>Setdb1</em> was deleted only in epithelial cells. At embryonic day 14.5 (E14.5), immunofluorescence staining was performed to confirm the absence of SETDB1 within the epithelium of tooth embryos from <em>Setdb1</em> ^{<em>fl/fl,Keratin14</em>-Cre+} mice. Mouse embryos were harvested after reaching embryonic day 13.5 (E13.5), and sections were prepared for histological analysis. To observe tooth morphology in detail, electron microscopy and micro-CT analysis were performed at postnatal months 1 (P1M) and 6 (P6M). Tooth embryos were harvested from postnatal day 7 (P7) mice, and the epithelial components of the tooth embryos were isolated and examined using quantitative RT-PCR for the expression of genes involved in tooth development.</p></div><div><h3>Results</h3><p><em>Setdb1</em> ^{<em>fl/fl,Keratin14</em>-Cre+} mice exhibited enamel hypoplasia, brittle and fragile dentition, and significant abrasion. Coronal sections displayed abnormal ameloblast development, including immature polarization, and a thin enamel layer that detached from the dentinoenamel junction at P7. Electron microscopic analysis revealed characteristic findings such as an uneven surface and the absence of an enamel prism. The expression of <em>Msx2</em>, <em>Amelogenin (Amelx), Ameloblastin (Ambn), and Enamelin (Enam)</em> was significantly downregulated in the epithelial components of tooth germs in <em>Setdb1</em> ^{<em>fl/fl,Keratin14</em>-Cre+} mice.</p></div><div><h3>Conclusions</h3><p>These results indicate that SETDB1 in epithelial cells is important for tooth development and clarify the relationship between the epigenetic regulation of SETDB1 and amelogenesis imperfecta for the first time.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141322205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of fibroblast growth factor-2 in modulating the differentiation of periodontal ligament and alveolar bone-derived stem cells","authors":"Benjamin Sexton ,&nbsp;Yuanyuan Han ,&nbsp;Renan Dal-Fabbro ,&nbsp;Jinping Xu ,&nbsp;Darnell Kaigler ,&nbsp;Marco C. Bottino","doi":"10.1016/j.archoralbio.2024.106027","DOIUrl":"https://doi.org/10.1016/j.archoralbio.2024.106027","url":null,"abstract":"<div><h3>Objective</h3><p>This study examined how range concentrations of Fibroblast Growth Factor-2 (FGF-2) influence the differentiation and activity of human-derived periodontal ligament (hPDLSCs) and alveolar bone-derived stem cells (haBMSCs).</p></div><div><h3>Design</h3><p>hPDLSCs and haBMSCs were cultured with varying concentrations of FGF-2 (0, 1, 2.5, 5, 10, 20 ng/mL) and monitored for osteogenic differentiation through alkaline phosphatase (ALP) activity and quantification of gene expression (qRT-PCR) for osteogenesis markers. Additionally, alizarin red staining and a hydroxyproline colorimetric assay evaluated and quantified osteogenic matrix mineralization and collagen deposition. Statistical analyses were performed using one-way ANOVA or two-way ANOVA for multiple comparisons between groups.</p></div><div><h3>Results</h3><p>At low FGF-2 concentrations, hPDLSCs differentiated toward an osteogenic lineage, whereas higher concentrations of FGF-2 inhibited osteogenesis and promoted fibroblastic differentiation. The effect of FGF-2 at the lowest concentration tested (1 ng/mL) led to significantly higher ALP activity than osteogenically induced positive controls at early time points and equivalent RUNX2 expression at early and later time points. FGF-2 supplementation of haBMSC cultures was sufficient, at all concentrations, to increase ALP activity at an earlier time point. Mineralization of haBMSC cultures increased significantly within 5–20 ng/mL FGF-2 concentrations under basal growth media conditions (α-minimal essential medium supplemented with 15 % fetal bovine serum and 1 % penicillin/streptomycin).</p></div><div><h3>Conclusions</h3><p>FGF-2 has a dual capacity in promoting osteogenic and fibroblastic differentiation within hPDLSCs contingent upon the dosage and timing of administration, alongside supporting osteogenic differentiation in haBMSCs. These findings underscore the need for precision growth factors dosing when considering the design of biomaterials for periodontal regeneration.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141308216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In vivo modification of the enamel pellicle and saliva resveratrol levels after use of resveratrol-containing orodispersible capsules","authors":"Flávia Mauad Levy ,&nbsp;João Victor Frazão Câmara ,&nbsp;Talita Mendes Oliveira Ventura ,&nbsp;Vinícius Taioqui Pelá ,&nbsp;Flávia Iano ,&nbsp;Tamara Teodoro Araujo ,&nbsp;Thamyris de Souza Carvalho ,&nbsp;Nathalia Mariana Pavan ,&nbsp;Valdecir Farias Ximenes ,&nbsp;Marília Afonso Rabelo Buzalaf","doi":"10.1016/j.archoralbio.2024.106016","DOIUrl":"https://doi.org/10.1016/j.archoralbio.2024.106016","url":null,"abstract":"<div><h3>Objectives</h3><p>To evaluate in vivo 1) the bioavailability of trans-resveratrol when administered through sublingual capsules; 2) the effect of resveratrol on the protein composition of the acquired enamel pellicle (AEP).</p></div><div><h3>Design</h3><p>Ten volunteers received a sublingual capsule containing 50 mg of trans-resveratrol. Unstimulated saliva was then collected after 0, 30, 60, and 120 min and AEP was collected after 120 min following administration of the capsule. In the next week, the volunteers received a placebo sublingual capsule, and saliva and AEP were collected again. Saliva samples were analyzed for free trans-resveratrol using high-performance liquid chromatopgraphy (HPLC), and AEP samples were subjected to proteomic analysis (nLC-ESI-MS/MS).</p></div><div><h3>Results</h3><p>Trans-resveratrol was detected in saliva at all the time points evaluated, with the peak at 30 min. A total of 242 proteins were identified in both groups. Ninety-six proteins were increased and 23 proteins were decreased in the Resveratrol group. Among the up-regulated proteins, isoforms of cystatins, PRPs, Mucin-7, Histatin-1, Lactotrasnferrin and Lysozyme-C were increased and the isoforms of Protein S100, Neutrophil defensins, Albumin, PRPs, and, Statherin were decreased in Resveratrol group.</p></div><div><h3>Conclusion</h3><p>The sublingual capsule is effective at increasing the bioavailability of trans-resveratrol in saliva. Several proteins involved in important processes to maintain systemic and oral health homeostasis were identified. These proteins differently expressed due to the presence of trans-resveratrol deserve attention for future studies, since they have important functions, mainly related to antimicrobial action.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141249700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dietary supplementation with grape seed extract from Vitus vinifera prevents suppression of GABAergic protein expression in female Sprague Dawley trigeminal ganglion in a model of chronic temporomandibular joint disorder","authors":"Sophia R. Antonopoulos,&nbsp;Daniel A. Garten,&nbsp;Paul L. Durham","doi":"10.1016/j.archoralbio.2024.106014","DOIUrl":"https://doi.org/10.1016/j.archoralbio.2024.106014","url":null,"abstract":"<div><h3>Objective</h3><p>To investigate cellular changes in protein expression in the trigeminal ganglion in an established preclinical chronic model of temporomandibular joint disorder (TMD) in response to grape seed extract (GSE) supplementation based on its beneficial use in preclinical chronic orofacial pain models.</p></div><div><h3>Design</h3><p>Three experimental conditions included female Sprague-Dawley rats as naïve controls, and animals subjected to neck muscle inflammation and prolonged jaw opening with and without daily supplementation of GSE in the drinking water prior to inflammation. Changes were evaluated in mechanical sensitivity to von Frey filaments and protein expression in the trigeminal ganglion of animals 14 days post jaw opening.</p></div><div><h3>Results</h3><p>Calcitonin-gene related peptide and protein kinase A, proteins positively associated with peripheral sensitization and enhanced nociception, did not show elevated expression at day 14 in the model compared to naïve or GSE supplemented animals. However, neuronal levels of glutamate decarboxylase (GAD) 65/67, which are enzymes responsible for the synthesis of the inhibitory neurotransmitter GABA that functions to suppress neuronal excitability, were significantly decreased on day 14 post jaw opening. Similarly, a significant decrease in neuronal expression of the GABA receptor subunits GABAB1 and GABAB2, but not GABAA, was observed in the TMD model. Importantly, GSE prevented suppression of GAD 65/67 and GABAB subunits, maintaining levels similar to naïve animals.</p></div><div><h3>Conclusion</h3><p>Results from our study provide evidence of the downregulation of inhibitory GABAergic proteins in trigeminal ganglion neurons in a preclinical chronic TMD model and the benefits of GSE supplementation in preventing their suppression and maintaining normal levels.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141242247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Salivary buffering capacity is correlated with umami but not sour taste sensitivity in healthy adult Japanese subjects","authors":"Aiko Hyodo ,&nbsp;Ayaka Mikami ,&nbsp;Kengo Horie ,&nbsp;Yoshihiro Mitoh ,&nbsp;Yuzo Ninomiya ,&nbsp;Seiji Iida ,&nbsp;Ryusuke Yoshida","doi":"10.1016/j.archoralbio.2024.106013","DOIUrl":"https://doi.org/10.1016/j.archoralbio.2024.106013","url":null,"abstract":"<div><h3>Objective</h3><p>Saliva serves multiple important functions crucial for maintaining a healthy oral and systemic environment. Among them, the pH buffering effect, which is primarily mediated by bicarbonate ions, helps maintain oral homeostasis by neutralizing acidity from ingested foods. Therefore, higher buffering capacity, reflecting the ability to neutralize oral acidity, may influence taste sensitivity, especially for sour taste since it involves sensing H⁺ ions. This study aims to explore the relationship between salivary buffering capacity and taste sensitivities to the five basic tastes in healthy adult humans.</p></div><div><h3>Design</h3><p>Eighty seven healthy adult students participated in this study. Resting saliva volume was measured using the spitting method. The liquid colorimetric test was used to assess salivary buffering capacity. The whole-mouth taste testing method was employed to determine the recognition threshold for each tastant (NaCl, sucrose, citric acid, quinine-HCl, monosodium glutamate).</p></div><div><h3>Results</h3><p>Taste recognition thresholds for sour taste as well as sweet, salty, and bitter tastes showed no correlation with salivary buffering capacity. Interestingly, a negative relationship was observed between recognition threshold for umami taste and salivary buffering capacity. Furthermore, a positive correlation between salivary buffering capacity and resting saliva volume was observed.</p></div><div><h3>Conclusions</h3><p>Salivary buffering capacity primarily influences sensitivity to umami taste, but not sour and other tastes.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141242246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is epithelial-mesenchymal transition related to the biological behavior of salivary gland neoplasms?","authors":"Débora Frota Colares ,&nbsp;Nara Régia da Silva Domingos ,&nbsp;Rodrigo Porpino Mafra ,&nbsp;Leorik Pereira da Silva ,&nbsp;Leão Pereira Pinto ,&nbsp;Lélia Batista de Souza","doi":"10.1016/j.archoralbio.2024.106017","DOIUrl":"https://doi.org/10.1016/j.archoralbio.2024.106017","url":null,"abstract":"<div><h3>Objective</h3><p>To evaluate and compare the expression of E-cadherin, Snail1 and Twist1 in pleomorphic adenomas (PAs), adenoid cystic carcinomas (AdCCa) and carcinoma ex-pleomorphic adenomas (CaexPA) of salivary glands, as well as investigate possible associations with clinicopathological parameters.</p></div><div><h3>Study design</h3><p>E-cadherin, Snail1 and Twist1 antibody immunostaining were analyzed semiquantitatively in 20 PAs, 20 AdCCas and 10 CaexPAs. Cases were classified as low and high expression for analysis of the association with clinicopathological parameters.</p></div><div><h3>Results</h3><p>Compared to PAs, AdCCas and CaexPAs exhibited higher nuclear expression of Snail1 (<em>p</em> = 0.021 and <em>p</em> = 0.028, respectively) and Twist1 (<em>p</em> = 0.009 and <em>p</em> = 0.001). Membranous and cytoplasmic expression of E-cadherin were positively correlated in PAs, AdCCas and CaexPAs (<em>r</em> = 0.645, <em>p</em> = 0.002; <em>r</em> = 0.824, <em>p</em> &lt; 0.001; <em>r</em> = 0.677, <em>p</em> = 0.031). In PAs, positive correlation was found between nuclear expression of Snail1 and membrane expression of E-cadherin (<em>r</em> = 0.634; <em>p</em> = 0.003), as well as between nuclear expression of Snail1 and Twist1 (<em>r</em> = 0.580; <em>p</em> = 0.007). Negative correlations were detected between membrane expression of E-cadherin and cytoplasmic expression of Snail1 in AdCCas (<em>r</em> = − 0.489; <em>p</em> = 0.029).</p></div><div><h3>Conclusions</h3><p>E-cadherin, Twist1, and Snail1 may participate in modulating events related to cell differentiation and adhesion in PAs and to biological behavior in AdCCas and CaexPAs, which indicates the involvement of EMT in these processes. Furthermore, the expression of these proteins in these carcinomas may reflect the plasticity feature of EMT.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141289964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evergrowing incisors of diprotodont marsupials record age and life history","authors":"William M.G. Parker ,&nbsp;Justin W. Adams ,&nbsp;Eliza J. Campbell ,&nbsp;Graeme Coulson ,&nbsp;Gordon D. Sanson ,&nbsp;Alistair R. Evans","doi":"10.1016/j.archoralbio.2024.106018","DOIUrl":"https://doi.org/10.1016/j.archoralbio.2024.106018","url":null,"abstract":"<div><h3>Objective</h3><p>Tooth growth and wear are commonly used tools for determining the age of mammals. The most speciose order of marsupials, Diprotodontia, is characterised by a pair of procumbent incisors within the lower jaw. This study examines the growth and wear of these incisors to understand their relationship with age and sex.</p></div><div><h3>Design</h3><p>Measurements of mandibular incisor crown and root length were made for two sister species of macropodid (kangaroos and wallabies); <em>Macropus giganteus</em> and <em>Macropus fuliginosus</em>. Histological analysis examined patterns of dentine and cementum deposition within these teeth. Broader generalisability within Diprotodontia was tested using dentally reduced <em>Tarsipes rostratus</em> – a species disparate in body size and incisor function to the studied macropodids.</p></div><div><h3>Results</h3><p>In the macropodid sample it is demonstrated that the hypsodont nature of these incisors makes measurements of their growth (root length) and wear (crown length) accurate indicators of age and sex. Model fitting finds that root growth proceeds according to a logarithmic function across the lifespan, while crown wear follows a pattern of exponential reduction for both macropodid species. Histological results find that secondary dentine deposition and cementum layering are further indicators of age. Incisor measurements are shown to correlate with age in the sample of <em>T. rostratus</em>.</p></div><div><h3>Conclusions</h3><p>The diprotodontian incisor is a useful tool for examining chronological age and sex, both morphologically and microstructurally. This finding has implications for population ecology, palaeontology and marsupial evolution.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0003996924001390/pdfft?md5=c7987e80eea2ddcab22c393e4aa3cbae&pid=1-s2.0-S0003996924001390-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141308215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}