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Kzar WA, Abbas RF. Association of Polymorphism with Periodontitis and Salivary Levels of Hypoxia-Inducible Factor-1α. Eur J Dent 2024. [PMID: 38744330 DOI: 10.1055/s-0044-1785530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024] Open
Abstract
OBJECTIVE This investigation aims to investigate the association between HIF-1α genetic polymorphism and periodontitis and examine and contrast the levels of HIF-1α present in the saliva of subjects afflicted with periodontitis and in the control group. Additionally, this study aims to establish diagnostic proficiency of this biomarker in distinguishing between periodontal health and disease. MATERIALS AND METHODS This study entailed the collection of venous blood samples and unstimulated saliva samples from a total of 160 participants, encompassing 80 individuals diagnosed with periodontitis and 80 periodontitis-free individuals. The periodontal parameters were evaluated, involving the measurement of clinical attachment loss, the probing pocket depth, and the bleeding on probing percentage. Subsequently, genetic analysis of HIF-1α using polymerase chain reaction (PCR) technique, DNA sequencing, and enzyme-linked immunosorbent assays was conducted. RESULTS The genetic analysis of 352 bp of the HIF-1α gene revealed the presence of 66 single-nucleotide polymorphisms (SNPs) in control samples, whereas 78 SNPs were found in periodontitis sample. The nucleotide A was replaced with a C nucleotide at position 207 of the amplified PCR fragments. The homozygous AA pattern was predominant in the control group, with significant differences between the two groups. In contrast, the homozygous CC pattern was more dominant in the periodontitis group, with significant differences between the two groups. The analysis of Hardy-Weinberg equilibrium for the comparison between the observed and the expected genotypes showed significant differences between the observed and the expected values in the control and periodontitis groups, as well as the total sample. The highest mean values of the measured periodontal parameters were found in the periodontitis group (clinical attachment loss = 4.759, probing pocket depth = 4.050, and bleeding on probing = 30.950) with statistically significant differences between the groups. The periodontitis group showed significantly higher salivary HIF-1α levels compared to control group (p < 0.001). Besides, HIF-1α is a good biomarker in distinguishing between periodontal health and periodontitis. CONCLUSION rs1951795 SNP of HIF-1α has no significant impact on the progression of periodontitis and the salivary level HIF-1α. Periodontitis results in a notable elevation in HIF-1α salivary levels, with an outstanding diagnostic ability to distinguish between periodontitis and periodontal health.
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Affiliation(s)
- Wael Abdulazeez Kzar
- Department of Periodontology, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Raghad Fadhil Abbas
- Department of Periodontology, College of Dentistry, University of Baghdad, Baghdad, Iraq
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Davis LL, Aragão WAB, de Oliveira Lopes G, Eiró LG, Freire AR, Prado FB, Rossi AC, da Silva Cruz A, das Graças Fernandes Dantas K, Albuquerque ARL, Paz SPA, Angélica RS, Lima RR. Chronic exposure to lead acetate promotes changes in the alveolar bone of rats: microstructural and physical-chemical characterization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:13930-13940. [PMID: 34599710 DOI: 10.1007/s11356-021-16723-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
There are a few data relating to the effects of lead (Pb) exposure on the alveolar bone, which has very distinct morphophysiological characteristics and is of great importance in the oral cavity. In this context, the aim of this study was to investigate the changes promoted after long-term exposure to Pb in the microstructure of the alveolar bone of rats. Twenty adult Wistar rats were exposed to 50 mg/kg/day of lead acetate for 55 days. These animals were euthanized and had their mandible removed. Each mandible was divided into hemimandibles, and the alveolar bone was used for bone lead quantification, crystallinity analysis, microstructure evaluation by the percentage of bone volume (BV/TV), number of trabeculae (Tb.N), thickness of the trabecular (Tb.Th), and trabecular space (Tb.Sp). Morphometric analysis of the exposed root area was also performed. Long-term exposure to Pb resulted in high levels of Pb in the alveolar bone but showed no changes in the organization of crystallinity. The microstructural analyses showed a reduction of BV/TV, Tb.Th, and Tb.N and increase of Tb.Sp parameters, resulting in an increase in the exposed root area and an alveolar bone loss in height. The findings of this study reveal the ability of Pb to alter the alveolar bone microstructure after long-term exposure to the metal, possibly due to changes in tissue homeostasis, contributing to the reduction of bone quality.
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Affiliation(s)
- Lodinikki Lemoy Davis
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa street, N. 1. Campus do Guamá. - CEP, Belém, PA, 66075-110, Brazil
| | - Walessa Alana Bragança Aragão
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa street, N. 1. Campus do Guamá. - CEP, Belém, PA, 66075-110, Brazil
| | - Géssica de Oliveira Lopes
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa street, N. 1. Campus do Guamá. - CEP, Belém, PA, 66075-110, Brazil
| | - Luciana Guimaraes Eiró
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa street, N. 1. Campus do Guamá. - CEP, Belém, PA, 66075-110, Brazil
| | - Alexandre Rodrigues Freire
- Laboratory of research in Mechanobiology, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, Brazil
| | - Felippe Bevilacqua Prado
- Laboratory of research in Mechanobiology, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, Brazil
| | - Ana Cláudia Rossi
- Laboratory of research in Mechanobiology, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, Brazil
| | - Allan da Silva Cruz
- Group of Applied Analytical Spectrometry, Institute of Natural and Exact Sciences, Federal University of Pará, Belém, PA, Brazil
| | | | - Alan Rodrigo Leal Albuquerque
- Group of Applied Analytical Spectrometry, Institute of Natural and Exact Sciences, Federal University of Pará, Belém, PA, Brazil
| | - Simone Patricia Aranha Paz
- Group of Applied Analytical Spectrometry, Institute of Natural and Exact Sciences, Federal University of Pará, Belém, PA, Brazil
| | - Rômulo Simões Angélica
- Laboratory of Mineral Characterization, Institute of Geology and Geochemistry, Federal University of Pará, Belém, PA, Brazil
| | - Rafael Rodrigues Lima
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa street, N. 1. Campus do Guamá. - CEP, Belém, PA, 66075-110, Brazil.
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Zhang S, Huo X, Li M, Hou R, Cong X, Xu X. Oral antimicrobial activity weakened in children with electronic waste lead exposure. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:14763-14770. [PMID: 32056098 DOI: 10.1007/s11356-020-08037-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 02/10/2020] [Indexed: 02/05/2023]
Abstract
Environmental lead (Pb) exposure can induce dysbacteriosis, impair oral health, and is associated with the development of dental caries. However, the mechanism is unclear. The aim of this study was to explore the effects of Pb toxicity on oral antimicrobial activity in children in an e-waste area. Results showed higher blood Pb levels in e-waste-exposed group children, accompanied by decreased saliva SAG (salivary agglutinin) concentrations, increased peripheral WBC (white blood cell) counts and monocyte counts, and elevated peripheral monocyte percentage. LnPb (natural logarithmic transformation of blood Pb level) was negatively correlated with saliva SAG concentration, while positively correlated with peripheral monocyte percentage. Saliva SAG concentration played a complete mediating role in the correlation of LnPb to peripheral monocyte percentage. To our knowledge, this is the first study on the relationship of environmental Pb exposure and oral antimicrobial activity in children, showing that environmental Pb exposure may weaken oral antimicrobial activity through reducing saliva SAG concentration, which may raise the risk of oral dysbacteriosis and ultimately pathogen infection.
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Affiliation(s)
- Shaocheng Zhang
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, 22 Xinling Rd, Shantou, 515041, Guangdong, China
| | - Xia Huo
- Laboratory of Environmental Medicine and Developmental Toxicology, Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511486, Guangdong, China
| | - Minghui Li
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, 22 Xinling Rd, Shantou, 515041, Guangdong, China
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, 9713 GZ, Groningen, The Netherlands
| | - Ruikun Hou
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, 22 Xinling Rd, Shantou, 515041, Guangdong, China
| | - Xiaowei Cong
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, 22 Xinling Rd, Shantou, 515041, Guangdong, China
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, 9713 GZ, Groningen, The Netherlands
| | - Xijin Xu
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, 22 Xinling Rd, Shantou, 515041, Guangdong, China.
- Department of Cell Biology and Genetics, Shantou University Medical College, Shantou, 515041, Guangdong, China.
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Khalid M, Abdollahi M. Role of lead in dental diseases. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, TOXICOLOGY AND CARCINOGENESIS 2020; 38:329-361. [PMID: 33382012 DOI: 10.1080/26896583.2020.1834313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lead (Pb) is ubiquitous in our environment and causes many pathophysiological health effects, including dental diseases. Dental Pb levels are considered good biological indicators of environmental and occupational Pb exposure. Pb in blood and saliva causes imbalances in the growth of oral microflora. The pH of saliva decreases, interferes with and interacts with bone-seeking elements, changes oral inflammatory parameters, generates reactive oxygen species, causes oxidative damage, and delays the mineralization process, leading to dental diseases. Pb's dental diseases include periodontitis, enamel lesions and defects, fluorosis, Burton's line, and tooth loss. Environmental and physiological factors, including age, gender, tooth type and position, pregnancy and lactation, eating and drinking habits, smoking habits, and exposures from Pb-contaminated residential and occupational areas, affect the distribution of Pb in blood, bone, and saliva, which contributes to dental diseases. However, living and working in Pb free areas can prevent environmental and occupational Pb exposure. Healthy lifestyles and eating habits, prohibiting smoking and alcohol drinking, further help prevent Pb exposure. Also, the fluoridation of water, salt, and milk provide nutritional supplements of trace elements, which can help prevent teeth from absorbing Pb from the environment, thereby reducing the risk of dental diseases.
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Affiliation(s)
- Madiha Khalid
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS) and Department of Toxicology and Pharmacology, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Abdollahi
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS) and Department of Toxicology and Pharmacology, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Emecen-Huja P, Li HF, Ebersole JL, Lambert J, Bush H. Epidemiologic evaluation of Nhanes for environmental Factors and periodontal disease. Sci Rep 2019; 9:8227. [PMID: 31160648 PMCID: PMC6547714 DOI: 10.1038/s41598-019-44445-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 04/15/2019] [Indexed: 01/22/2023] Open
Abstract
Periodontitis is a chronic inflammation that destroys periodontal tissues caused by the accumulation of bacterial biofilms that can be affected by environmental factors. This report describes an association study to evaluate the relationship of environmental factors to the expression of periodontitis using the National Health and Nutrition Examination Study (NHANES) from 1999-2004. A wide range of environmental variables (156) were assessed in patients categorized for periodontitis (n = 8884). Multiple statistical approaches were used to explore this dataset and identify environmental variable patterns that enhanced or lowered the prevalence of periodontitis. Our findings indicate an array of environmental variables were different in periodontitis in smokers, former smokers, or non-smokers, with a subset of specific environmental variables identified in each population subset. Discriminating environmental factors included blood levels of lead, phthalates, selected nutrients, and PCBs. Importantly, these factors were found to be coupled with more classical risk factors (i.e. age, gender, race/ethnicity) to create a model that indicated an increased disease prevalence of 2-4 fold across the sample population. Targeted environmental factors are statistically associated with the prevalence of periodontitis. Existing evidence suggests that these may contribute to altered gene expression and biologic processes that enhance inflammatory tissue destruction.
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Affiliation(s)
- P Emecen-Huja
- Division of Periodontics, College of Dental Medicine, Medical University of South Carolina, Charleston, South Carolina, USA.
| | - H-F Li
- Providence St. Joseph Health of Oregon, Medical Data and Research Center, Portland, OR, USA
| | - J L Ebersole
- School of Dental Medicine, University of Nevada, Las Vegas, Las Vegas, Nevada, USA
| | - J Lambert
- College of Nursing, University of Cincinnati, Cincinnati, OH, USA
| | - H Bush
- Department of Biostatistics, College of Public Health, University of Kentucky, Lexington, KY, USA
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Peyyala R, Emecen-Huja P, Ebersole JL. Environmental lead effects on gene expression in oral epithelial cells. J Periodontal Res 2018; 53:961-971. [PMID: 30152021 DOI: 10.1111/jre.12594] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 06/20/2018] [Accepted: 07/04/2018] [Indexed: 01/02/2023]
Abstract
BACKGROUND AND OBJECTIVE Host responses in periodontitis span a range of local and emigrating cell types and biomolecules. Accumulating evidence regarding the expression of this disease across the population suggests some component of genetic variation that controls onset and severity of disease, in concert with the qualitative and quantitative parameters of the oral microbiome at sites of disease. However, there remains little information regarding the capacity of accruing environmental stressors or modifiers over a lifespan at both the host genetic and microbial ecology levels to understand fully the population variation in disease. This study evaluated the impact of environmental lead exposure on the responses of oral epithelial cells to challenge with a model pathogenic oral biofilm. METHODS AND RESULTS Using NanoString technology to quantify gene expression profiles of an array of 511 host response-associated genes in the epithelial cells, we identified an interesting primary panel of basal responses of the cells with numerous genes not previously considered as major response markers for epithelial cells, eg, interleukin (IL)-32, CTNNB1, CD59, MIF, CD44 and CD99. Even high levels of environment lead had little effect on these constitutive responses. Challenge of the cells with the biofilms (Streptococcus gordonii/Fusobacterium nucleatum/Porphyromonas gingivalis) resulted in significant increases in an array of host immune-related genes (134 of 511). The greatest magnitude in differential expression was observed with many genes not previously described as major response genes in epithelial cells, including IL-32, CD44, NFKBIA, CTSC, TNFAIP3, IL-1A, IL-1B, IL-8 and CCL20. The effects of environmental lead on responses to the biofilms were mixed, although levels of IL-8, CCL20 and CD70 were significantly decreased at lead concentrations of 1 and/or 5 μmol/L. CONCLUSION The results provided new information on a portfolio of genes expressed by oral epithelial cells, targeted substantial increases in an array of immune-related genes post-biofilm challenge, and a focused impact of environmental lead on these induced responses.
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Affiliation(s)
- Rebecca Peyyala
- Center for Oral Health Research and Division of Periodontology, College of Dentistry, University of Kentucky, Lexington, Kentucky
| | - Pinar Emecen-Huja
- Center for Oral Health Research and Division of Periodontology, College of Dentistry, University of Kentucky, Lexington, Kentucky
| | - Jeffrey L Ebersole
- Center for Oral Health Research and Division of Periodontology, College of Dentistry, University of Kentucky, Lexington, Kentucky
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