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Miguel MMV, Shaddox LM. Grade C Molar-Incisor Pattern Periodontitis in Young Adults: What Have We Learned So Far? Pathogens 2024; 13:580. [PMID: 39057807 PMCID: PMC11279578 DOI: 10.3390/pathogens13070580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2024] [Revised: 06/26/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024] Open
Abstract
Grade C molar-incisor pattern periodontitis (C-MIP) is a disease that affects specific teeth with an early onset and aggressive progression. It occurs in systemically healthy patients, mostly African descendants, at an early age, with familial involvement, minimal biofilm accumulation, and minor inflammation. Severe and rapidly progressive bone loss is observed around the first molars and incisors. This clinical condition has been usually diagnosed in children and young adults with permanent dentition under 30 years of age. However, this disease can also affect the primary dentition, which is not as frequently discussed in the literature. Radiographic records have shown that most patients diagnosed in the permanent dentition already presented disease signs in the primary dentition. A hyperresponsive immunological profile is observed in local (gingival crevicular fluid-GCF) and systemic environments. Siblings have also displayed a heightened inflammatory profile even without clinical signs of disease. A. actinomycetemcomitans has been classified as a key pathogen in C-MIP in both dentitions. Scaling and root planning associated with systemic antibiotics is the current gold standard to treat C-MIP, leading to GCF biomarker reduction, some systemic inflammatory response modulation and microbiome profile changes to a healthy-site profile. Further studies should focus on other possible disease-contributing risk factors.
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Affiliation(s)
- Manuela Maria Viana Miguel
- Center for Oral Health Research, College of Dentistry, University of Kentucky, Lexington, KY 40508, USA;
| | - Luciana Macchion Shaddox
- Center for Oral Health Research, College of Dentistry, University of Kentucky, Lexington, KY 40508, USA;
- Department of Oral Health Practice, Periodontology Division, College of Dentistry, University of Kentucky, Lexington, KY 40508, USA
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2
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Gori A, Brindisi G, Daglia M, del Giudice MM, Dinardo G, Di Minno A, Drago L, Indolfi C, Naso M, Trincianti C, Tondina E, Brunese FP, Ullah H, Varricchio A, Ciprandi G, Zicari AM. Exploring the Role of Lactoferrin in Managing Allergic Airway Diseases among Children: Unrevealing a Potential Breakthrough. Nutrients 2024; 16:1906. [PMID: 38931261 PMCID: PMC11206375 DOI: 10.3390/nu16121906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/08/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024] Open
Abstract
The prevalence of allergic diseases has dramatically increased among children in recent decades. These conditions significantly impact the quality of life of allergic children and their families. Lactoferrin, a multifunctional glycoprotein found in various biological fluids, is emerging as a promising immunomodulatory agent that can potentially alleviate allergic diseases in children. Lactoferrin's multifaceted properties make it a compelling candidate for managing these conditions. Firstly, lactoferrin exhibits potent anti-inflammatory and antioxidant activities, which can mitigate the chronic inflammation characteristic of allergic diseases. Secondly, its iron-binding capabilities may help regulate the iron balance in allergic children, potentially influencing the severity of their symptoms. Lactoferrin also demonstrates antimicrobial properties, making it beneficial in preventing secondary infections often associated with respiratory allergies. Furthermore, its ability to modulate the immune response and regulate inflammatory pathways suggests its potential as an immune-balancing agent. This review of the current literature emphasises the need for further research to elucidate the precise roles of lactoferrin in allergic diseases. Harnessing the immunomodulatory potential of lactoferrin could provide a novel add-on approach to managing allergic diseases in children, offering hope for improved outcomes and an enhanced quality of life for paediatric patients and their families. As lactoferrin continues to capture the attention of researchers, its properties and diverse applications make it an intriguing subject of study with a rich history and a promising future.
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Affiliation(s)
- Alessandra Gori
- Department of Mother-Child, Urological Science, Sapienza University of Rome, 00161 Rome, Italy; (A.G.); (G.B.)
| | - Giulia Brindisi
- Department of Mother-Child, Urological Science, Sapienza University of Rome, 00161 Rome, Italy; (A.G.); (G.B.)
| | - Maria Daglia
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (M.D.); (A.D.M.); (H.U.)
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China
| | - Michele Miraglia del Giudice
- Department of Woman, Child and General and Specialized Surgery, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (M.M.d.G.); (G.D.); (C.I.)
| | - Giulio Dinardo
- Department of Woman, Child and General and Specialized Surgery, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (M.M.d.G.); (G.D.); (C.I.)
| | - Alessandro Di Minno
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (M.D.); (A.D.M.); (H.U.)
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Naples, Italy
| | - Lorenzo Drago
- Laboratory of Clinical Microbiology & Microbiome, Department of Biomedical Sciences for Health, University of Milan, 20122 Milan, Italy;
- UOC Laboratory of Clinical Medicine, MultiLab Department, IRCCS Multimedica, 20138 Milan, Italy
| | - Cristiana Indolfi
- Department of Woman, Child and General and Specialized Surgery, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (M.M.d.G.); (G.D.); (C.I.)
| | - Matteo Naso
- Allergy Center, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (M.N.); (C.T.)
| | - Chiara Trincianti
- Allergy Center, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (M.N.); (C.T.)
| | - Enrico Tondina
- Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy;
| | | | - Hammad Ullah
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (M.D.); (A.D.M.); (H.U.)
| | - Attilio Varricchio
- Department of Otolaryngology, University of Molise, 86100 Campobasso, Italy;
| | - Giorgio Ciprandi
- Allergy Clinic, Casa di Cura Villa Montallegro, 16145 Genoa, Italy;
| | - Anna Maria Zicari
- Department of Mother-Child, Urological Science, Sapienza University of Rome, 00161 Rome, Italy; (A.G.); (G.B.)
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3
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Ustianowska K, Ustianowski Ł, Bakinowska E, Kiełbowski K, Szostak J, Murawka M, Szostak B, Pawlik A. The Genetic Aspects of Periodontitis Pathogenesis and the Regenerative Properties of Stem Cells. Cells 2024; 13:117. [PMID: 38247810 PMCID: PMC10814055 DOI: 10.3390/cells13020117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/05/2024] [Accepted: 01/07/2024] [Indexed: 01/23/2024] Open
Abstract
Periodontitis (PD) is a prevalent and chronic inflammatory disease with a complex pathogenesis, and it is associated with the presence of specific pathogens, such as Porphyromonas gingivalis. Dysbiosis and dysregulated immune responses ultimately lead to chronic inflammation as well as tooth and alveolar bone loss. Multiple studies have demonstrated that genetic polymorphisms may increase the susceptibility to PD. Furthermore, gene expression is modulated by various epigenetic mechanisms, such as DNA methylation, histone modifications, or the activity of non-coding RNA. These processes can also be induced by PD-associated pathogens. In this review, we try to summarize the genetic processes that are implicated in the pathogenesis of PD. Furthermore, we discuss the use of these mechanisms in diagnosis and therapeutic purposes. Importantly, novel treatment methods that could promote tissue regeneration are greatly needed in PD. In this paper, we also demonstrate current evidence on the potential use of stem cells and extracellular vesicles to stimulate tissue regeneration and suppress inflammation. The understanding of the molecular mechanisms involved in the pathogenesis of PD, as well as the impact of PD-associated bacteria and stem cells in these processes, may enhance future research and ultimately improve long-term treatment outcomes.
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Affiliation(s)
- Klaudia Ustianowska
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.U.); (Ł.U.); (E.B.); (K.K.); (M.M.); (B.S.)
| | - Łukasz Ustianowski
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.U.); (Ł.U.); (E.B.); (K.K.); (M.M.); (B.S.)
| | - Estera Bakinowska
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.U.); (Ł.U.); (E.B.); (K.K.); (M.M.); (B.S.)
| | - Kajetan Kiełbowski
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.U.); (Ł.U.); (E.B.); (K.K.); (M.M.); (B.S.)
| | - Joanna Szostak
- Department of Experimental and Clinical Pharmacology, Pomeranian Medical University, 70-111 Szczecin, Poland;
| | - Martyna Murawka
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.U.); (Ł.U.); (E.B.); (K.K.); (M.M.); (B.S.)
| | - Bartosz Szostak
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.U.); (Ł.U.); (E.B.); (K.K.); (M.M.); (B.S.)
| | - Andrzej Pawlik
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (K.U.); (Ł.U.); (E.B.); (K.K.); (M.M.); (B.S.)
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4
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Yoshida A, Bouziane A, Erraji S, Lakhdar L, Rhissassi M, Miyazaki H, Ansai T, Iwasaki M, Ennibi O. Etiology of aggressive periodontitis in individuals of African descent. JAPANESE DENTAL SCIENCE REVIEW 2021; 57:20-26. [PMID: 33737991 PMCID: PMC7946349 DOI: 10.1016/j.jdsr.2020.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/22/2020] [Accepted: 12/30/2020] [Indexed: 12/30/2022] Open
Abstract
Aggressive periodontitis (AgP) is a form of periodontitis that affects adolescents and has a significantly higher prevalence in individuals of African descent. AgP typically shows familial aggregation, suggesting a genetic predisposition. Young age, good health status, rapid attachment loss, and familial aggregation are the primary features of this disease. AgP has been closely linked to specific bacterial strains of Aggregatibacter actinomycetemcomitans. A. actinomycetemcomitans strains isolated from patients with AgP produce leukotoxin (LtxA), which specifically affects polymorphonuclear leukocytes in primates, especially humans. High-throughput 16S rRNA gene sequencing and bioinformatics analyses revealed differences in the subgingival microbiota between patients with AgP and those with chronic periodontitis (ChP). The genera Atopobium and Prevotella show increased prevalences in AgP than in ChP. According to AgP susceptibility, several single nucleotide polymorphisms have been detected in different genes in individuals of African descent. Interleukin (IL)-1α and IL-1β genetic polymorphisms may be associated with the severity of both ChP and AgP. An elevated serum level of IL-17 produced by Th17 cells may be a characteristic of AgP. Analyses of the relationships among bacteria, host defenses, genetic predisposition, and numerous other factors are required to understand the progression of this disease.
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Affiliation(s)
- Akihiro Yoshida
- Department of Oral Microbiology, Faculty of Dentistry, Matsumoto Dental University, Shiojiri, Japan
| | - Amal Bouziane
- Department of Periodontology, School of Medicine Dentistry, Mohammed V University, Rabat, Morocco
| | - Samir Erraji
- Department of Periodontology, School of Medicine Dentistry, Mohammed V University, Rabat, Morocco
| | - Leila Lakhdar
- Department of Periodontology, School of Medicine Dentistry, Mohammed V University, Rabat, Morocco
| | - Meryem Rhissassi
- Department of Periodontology, School of Medicine Dentistry, Mohammed V University, Rabat, Morocco
| | - Hideo Miyazaki
- Department of Dental Technology, Meirin College, Niigata, Japan
| | - Toshihiro Ansai
- Division of Community Oral Health Development, Kyushu Dental University, Kitakyushu, Japan
| | | | - Oumkeltoum Ennibi
- Department of Periodontology, School of Medicine Dentistry, Mohammed V University, Rabat, Morocco
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5
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Shaddox LM, Morford LA, Nibali L. Periodontal health and disease: The contribution of genetics. Periodontol 2000 2020; 85:161-181. [PMID: 33226705 DOI: 10.1111/prd.12357] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Periodontitis is an infectious, inflammatory disease that is associated with a complex interplay between specific bacteria, host response, and environmental factors. Because of its high degree of familial aggregation, specifically for the more aggressive forms of the disease, genetics factors have been implicated in disease pathogenesis for several decades. This review provides an overview of what we currently know regarding the genetic and epigenetic contributions to periodontal disease and discusses future opportunities in the field.
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Affiliation(s)
- Luciana Macchion Shaddox
- Division of Periodontology, Department of Oral Health Practice, University of Kentucky College of Dentistry, Lexington, Kentucky, USA
| | - Lorri Ann Morford
- Division of Orthodontics, Department of Oral Health Sciences, University of Kentucky College of Dentistry, Lexington, Kentucky, USA
| | - Luigi Nibali
- Faculty of Dentistry, Oral & Craniofacial Sciences, Kings College London, Guy's Hospital, London, UK
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6
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Zupin L, Polesello V, Segat L, Kamada AJ, Kuhn L, Crovella S. Association Between LTF Polymorphism and Risk of HIV-1 Transmission Among Zambian Seropositive Mothers. Curr HIV Res 2019; 16:52-57. [PMID: 29165086 DOI: 10.2174/1570162x15666171120105752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 10/11/2017] [Accepted: 11/14/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Lactoferrin is a member of the innate immune system acting in the first line of defence against pathogens, and it is known for its antibacterial, antifungal and antiviral activity, including HIV-1. Two polymorphisms, T29A and R47K, in the exon 1 region of the LTF gene (encoding for the lactoferrin protein) were previously described as able to influence the lactoferrin antimicrobial function. OBJECTIVES LTF T29A and R47K genetic variants were analysed in a Zambian population to unravel if these polymorphisms could play a role in HIV-1 mother-to-child HIV-1 transmission. METHODS LTF T29A and R47K polymorphisms were genotyped, using allelic specific fluorescent probes and real time PCR, in a population comprising 101 HIV-1 positive mothers and 333 children born to seropositive mothers. RESULTS Maternal LTF T29A A/A and A/G genotypes were found to be associated with decreased risk of HIV-1 MTCT, being more frequent among non-transmitter mothers respect to transmitter mothers. CONCLUSION Our data suggested that maternal LTF genetic background contributes to the susceptibility to HIV-1 transmission from mother to new-borns.
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Affiliation(s)
- Luisa Zupin
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Vania Polesello
- Institute for Maternal and Child Health IRCCS "Burlo Garofolo", Trieste, Italy
| | - Ludovica Segat
- Institute for Maternal and Child Health IRCCS "Burlo Garofolo", Trieste, Italy
| | | | - Louise Kuhn
- Gertrude H. Sergievsky Center and Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, United States
| | - Sergio Crovella
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy.,Institute for Maternal and Child Health IRCCS "Burlo Garofolo", Trieste, Italy
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7
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Wang M, Qin M. Lack of association between LTF gene polymorphisms and different caries status in primary dentition. Oral Dis 2018; 24:1545-1553. [PMID: 29989276 DOI: 10.1111/odi.12939] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 06/27/2018] [Accepted: 07/02/2018] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Dental caries is related to cariogenic bacteria, salivary components, oral hygiene and host susceptibility. Lactoferrin is an important antimicrobial glycoprotein in saliva; however, the role of the LTF gene in caries susceptibility is unclear. We investigated the association between LTF polymorphisms and the severity of caries. DESIGN Our study included 910 healthy paediatric subjects (aged 24-48 months) categorised into three groups: 403 with no caries or white-spot lesions; 230 with moderate caries (8 ≤ dmft ≤ 12); and 277 with severe caries (13 ≤ dmft ≤ 20). Information regarding the subjects' oral habits was gathered using questionnaires. The LTF rs1126477 and rs1126478 polymorphism alleles were genotyped by Sanger sequencing. RESULTS The three groups showed no significant differences in LTF polymorphisms alleles, genotypes or haplotypes distribution. Multifactor dimensionality reduction analysis showed that the interactions between breastfeeding for a duration >24 months, night feeding >24 months and high frequency of sweet food intake increased the risk of caries (p = 0.0014); however, we detected no interaction effect between the LTF polymorphisms and oral habits on caries susceptibility. CONCLUSIONS The LTF rs1126477 and rs1126478 polymorphisms showed no association with the different levels of caries risk in our Chinese paediatric cohort.
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Affiliation(s)
- Mengchen Wang
- Department of Paediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China.,Department of Stomatology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Man Qin
- Department of Paediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
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8
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Velliyagounder K, Bahdila D, Pawar S, Fine DH. Role of lactoferrin and lactoferrin‐derived peptides in oral and maxillofacial diseases. Oral Dis 2018; 25:652-669. [DOI: 10.1111/odi.12868] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/20/2018] [Accepted: 03/17/2018] [Indexed: 12/30/2022]
Affiliation(s)
- K Velliyagounder
- Department of Oral BiologyRutgers School of Dental Medicine Newark New Jersey
| | - D Bahdila
- Department of Oral BiologyRutgers School of Dental Medicine Newark New Jersey
| | - S Pawar
- Department of Oral BiologyRutgers School of Dental Medicine Newark New Jersey
| | - DH Fine
- Department of Oral BiologyRutgers School of Dental Medicine Newark New Jersey
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9
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Gonçalves PF, Harris TH, Elmariah T, Aukhil I, Wallace MR, Shaddox LM. Genetic polymorphisms and periodontal disease in populations of African descent: A review. J Periodontal Res 2017; 53:164-173. [PMID: 29105764 DOI: 10.1111/jre.12505] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2017] [Indexed: 01/22/2023]
Abstract
Aggressive periodontitis is a rare but rapidly progressing form of periodontal disease that usually affects otherwise systemically healthy individuals, at a young age. It usually affects first molars and incisors, which are usually lost if treatment is not properly and early rendered. Although of low prevalence, it affects individuals of African descent at a higher prevalence, and usually multiple members within the same family. Several studies have been performed in the attempt to evaluate specific single nucleotide polymorphisms (SNPs) that could be associated with this disease. To the best of our knowledge, the present article provides the first review of the literature focusing on studies that evaluated SNPs in patients of African descent with aggressive periodontitis. Several SNPs have been evaluated in different genes according to their role in the pathogenesis of the disease, with positive and negative associations (such as IL1, FCGR3B, FPR1, LTF, CYBA, GLT6D1, TLR4) with both the localized and generalized forms of aggressive periodontitis. Given the complexity of periodontitis, the difficulty in gathering large cohorts diagnosed with this rare form of disease, and the fact that candidate gene studies may only determine part of the genetic risk of a disease, the search for specific SNPs associated with aggressive periodontitis seems to be a long one, most likely to result in the combination of multiple SNPs, in multiple genes.
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Affiliation(s)
- P F Gonçalves
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL, USA.,Department of Dentistry, Federal University of Jequitinhonha and Mucuri Valleys, Diamantina, MG, Brazil
| | - T H Harris
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - T Elmariah
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - I Aukhil
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - M R Wallace
- Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA.,University of Florida Genetics Institute, University of Florida, Gainesville, FL, USA
| | - L M Shaddox
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL, USA
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10
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Cardiometabolic risk factors and lactoferrin: polymorphisms and plasma levels in French-Canadian children. Pediatr Res 2017; 82:741-748. [PMID: 28678770 DOI: 10.1038/pr.2017.72] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 02/11/2017] [Indexed: 01/13/2023]
Abstract
BackgroundLactoferrin (LTF) could play a beneficial role in insulin resistance and diabetes, but the association of its gene variants with cardio-metabolic disorders in children has not been investigated. This study aimed to examine the relationship between LTF variants, plasma LTF concentrations, and cardio-metabolic risk factors in French-Canadian children.MethodsThe study cohort comprises 1,749 French Canadians aged 9, 13, and 16 years. The association of 13 LTF polymorphisms, metabolic parameters, and plasma LTF levels was tested in this cross-sectional, province-wide school-based survey.ResultsNone of the genetic association remained significant after correction for multiple testing and LTF SNPs were not associated with LTF levels. Plasma LTF was positively correlated with body mass index (r2=0.2245, P=0.0011) and weight (r2=0.2515, P=0.0008). After segregating according to high-density lipoprotein cholesterol (HDL-C), the association remained only in subjects exhibiting low HDL-C (r2=0.3868, P=0.0002 for body mass index and r2=0.3665, P=0.0004 for weight). In girls, plasma LTF was positively correlated with total cholesterol (r2=0.2231, P=0.0378), LDL cholesterol (r2=0.2409, P=0.0246), and apolipoprotein B (r2=0.2478, P=0.0207).ConclusionsWe found no association between LTF gene variants and metabolic parameters following correction for multiple testing. HDL-C and gender-specific positive associations were evidenced between plasma LTF, anthropometric profile, and lipid levels.
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11
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Zupin L, Robino A, Navarra CO, Pirastu N, Di Lenarda R, Gasparini P, Crovella S, Bevilacqua L. LTFandDEFB1polymorphisms are associated with susceptibility toward chronic periodontitis development. Oral Dis 2017; 23:1001-1008. [DOI: 10.1111/odi.12689] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 03/23/2017] [Accepted: 04/30/2017] [Indexed: 12/12/2022]
Affiliation(s)
- L Zupin
- Department of Surgical, Medical and Health Sciences; University of Trieste; Trieste Italy
| | - A Robino
- Institute for Maternal and Child Health-IRCCS “Burlo Garofolo”; Trieste Italy
| | - CO Navarra
- Department of Surgical, Medical and Health Sciences; University of Trieste; Trieste Italy
| | - N Pirastu
- Department of Surgical, Medical and Health Sciences; University of Trieste; Trieste Italy
| | - R Di Lenarda
- Department of Surgical, Medical and Health Sciences; University of Trieste; Trieste Italy
| | - P Gasparini
- Department of Surgical, Medical and Health Sciences; University of Trieste; Trieste Italy
- Institute for Maternal and Child Health-IRCCS “Burlo Garofolo”; Trieste Italy
| | - S Crovella
- Department of Surgical, Medical and Health Sciences; University of Trieste; Trieste Italy
- Institute for Maternal and Child Health-IRCCS “Burlo Garofolo”; Trieste Italy
| | - L Bevilacqua
- Department of Surgical, Medical and Health Sciences; University of Trieste; Trieste Italy
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12
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Stacy A, Abraham N, Jorth P, Whiteley M. Microbial Community Composition Impacts Pathogen Iron Availability during Polymicrobial Infection. PLoS Pathog 2016; 12:e1006084. [PMID: 27973608 PMCID: PMC5156373 DOI: 10.1371/journal.ppat.1006084] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 11/21/2016] [Indexed: 01/07/2023] Open
Abstract
Iron is an essential nutrient for bacterial pathogenesis, but in the host, iron is tightly sequestered, limiting its availability for bacterial growth. Although this is an important arm of host immunity, most studies examine how bacteria respond to iron restriction in laboratory rather than host settings, where the microbiome can potentially alter pathogen strategies for acquiring iron. One of the most important transcriptional regulators controlling bacterial iron homeostasis is Fur. Here we used a combination of RNA-seq and chromatin immunoprecipitation (ChIP)-seq to characterize the iron-restricted and Fur regulons of the biofilm-forming opportunistic pathogen Aggregatibacter actinomycetemcomitans. We discovered that iron restriction and Fur regulate 4% and 3.5% of the genome, respectively. While most genes in these regulons were related to iron uptake and metabolism, we found that Fur also directly regulates the biofilm-dispersing enzyme Dispersin B, allowing A. actinomycetemcomitans to escape from iron-scarce environments. We then leveraged these datasets to assess the availability of iron to A. actinomycetemcomitans in its primary infection sites, abscesses and the oral cavity. We found that A. actinomycetemcomitans is not restricted for iron in a murine abscess mono-infection, but becomes restricted for iron upon co-infection with the oral commensal Streptococcus gordonii. Furthermore, in the transition from health to disease in human gum infection, A. actinomycetemcomitans also becomes restricted for iron. These results suggest that host iron availability is heterogeneous and dependent on the infecting bacterial community. One of the most well-studied phenomena in microbiology is nutritional immunity, or how the host withholds nutrients such as iron to combat infection. As part of this, researchers have characterized how many pathogens respond to iron restriction. However, these studies are often conducted in laboratory media rather than the host. As a result, they overlook how the host environment, such as its microbiome, might alter pathogen behavior regarding iron during infection. To address this gap, we used an opportunistic pathogen that causes abscess and oral cavity infections. We defined how it responds to iron restriction in vitro and then used this data to assess its iron status in vivo. Our results show that in mono-culture abscesses the pathogen is not starved for iron but in co-culture abscesses and multispecies gum disease it is starved for iron. Therefore, host environments are not uniformly restricted for iron, and the microbiome can modulate iron availability to pathogens.
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Affiliation(s)
- Apollo Stacy
- Department of Molecular Biosciences, Institute of Cellular and Molecular Biology, John Ring LaMontagne Center for Infectious Disease, The University of Texas at Austin, Austin, TX United States of America
| | - Nader Abraham
- Department of Molecular Biosciences, Institute of Cellular and Molecular Biology, John Ring LaMontagne Center for Infectious Disease, The University of Texas at Austin, Austin, TX United States of America
| | - Peter Jorth
- Department of Molecular Biosciences, Institute of Cellular and Molecular Biology, John Ring LaMontagne Center for Infectious Disease, The University of Texas at Austin, Austin, TX United States of America
| | - Marvin Whiteley
- Department of Molecular Biosciences, Institute of Cellular and Molecular Biology, John Ring LaMontagne Center for Infectious Disease, The University of Texas at Austin, Austin, TX United States of America
- * E-mail:
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Lactoferrin gene polymorphisms in Italian patients with recurrent tonsillitis. Int J Pediatr Otorhinolaryngol 2016; 88:153-6. [PMID: 27497404 DOI: 10.1016/j.ijporl.2016.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 07/02/2016] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Recurrent tonsillitis is an oral pathology characterized by inflammation of tonsils. The disease susceptibility depends upon environmental and host factors, specifically the innate immune response, the first line of host defence could play an important role. Among innate immunity members, lactoferrin, known for its antimicrobial properties, was previously correlated with the risk of oral pathology as periodontitis and dental caries. METHODS 89 Italian children presenting recurrent tonsillitis and 95 healthy children were genotyped for two LTF non-synonymous polymorphisms, called Thr29Ala and Arg47Lys, in order to investigate their potential role in recurrent tonsillitis susceptibility. RESULTS no different allele, genotype and haplotype frequency distributions were detected comparing patients and controls. CONCLUSION data from the current study indicate that LTF polymorphisms might not be involved in recurrent tonsillitis development in our Italian population. However, since the importance of lactoferrin in oral immunity has been previously assessed, further studies should be necessary to unravel the potential role of LTF genetic variants in oral cavity.
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Zupin L, Polesello V, Coelho AVC, Boniotto M, Arraes LC, Segat L, Crovella S. Lactotransferrin gene functional polymorphisms do not influence susceptibility to human immunodeficiency virus-1 mother-to-child transmission in different ethnic groups. Mem Inst Oswaldo Cruz 2015; 110:222-9. [PMID: 25946246 PMCID: PMC4489453 DOI: 10.1590/0074-02760140447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 03/05/2015] [Indexed: 11/29/2022] Open
Abstract
Lactotransferrin, also known as lactoferrin, is an iron binding glycoprotein that
displays antiviral activity against many different infectious agents, including human
immunodeficiency virus (HIV)-1. Lactotransferrin is present in the breast milk and in
the female genitourinary mucosa and it has been hypothesised as a possible candidate
to prevent mother-to-child HIV-1 transmission. To verify if two functional
polymorphisms, Thr29Ala and Arg47Lys, in the lactotransferrin encoding gene (LTF)
could affect HIV-1 infection and vertical transmission, a preliminary association
study was performed in 238 HIV-1 positive and 99 HIV-1 negative children from Brazil,
Italy, Africa and India. No statistically significant association for the Thr29Ala
and Arg47Lys LTF polymorphisms and HIV-1 susceptibility in the studied populations
was found. Additionally LTF polymorphisms frequencies were compared between the four
different ethnic groups.
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Affiliation(s)
- Luisa Zupin
- Institute for Maternal and Child Health, Scientific Institute For Research, Hospitalization and Care Burlo Garofolo, Trieste, Italy
| | - Vania Polesello
- Institute for Maternal and Child Health, Scientific Institute For Research, Hospitalization and Care Burlo Garofolo, Trieste, Italy
| | | | - Michele Boniotto
- Faculty of Medicine, National Institute of Health and Medical Research, University of Paris-Est Créteil, Créteil, France
| | | | - Ludovica Segat
- Institute for Maternal and Child Health, Scientific Institute For Research, Hospitalization and Care Burlo Garofolo, Trieste, Italy
| | - Sergio Crovella
- Institute for Maternal and Child Health, Scientific Institute For Research, Hospitalization and Care Burlo Garofolo, Trieste, Italy
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Abstract
Lactoferrin is one of a number of multifunctional proteins that are present in or on all mucosal surfaces throughout the body. Levels of lactoferrin are consistently elevated in inflammatory diseases such as arthritis, inflammatory bowel diseases, corneal disease, and periodontitis. Single-nucleotide polymorphisms (SNPs) in lactoferrin have been shown to be present in individuals susceptible to Escherichia coli-induced travelers' diarrhea and in tear fluid derived from virally associated corneal disease. Here, we review data showing a lactoferrin SNP in amino acid position 29 in the antimicrobial region of lactoferrin that acts against caries associated bacteria. This SNP was initially discovered in African American subjects with localized aggressive periodontitis (LAP) who had proximal bone loss but minimal proximal caries. Results were confirmed in a genetic association study of children from Brazil with this same SNP who showed a reduced level of caries. In vitro data indicate that lactoferrin from whole saliva derived from subjects with this SNP, recombinant human lactoferrin containing this SNP, or an 11-mer peptide designed for this SNP kills mutans streptococci associated with caries by >1 log. In contrast, the SNP has minimal effect on Gram-negative species associated with periodontitis. Moreover, periodontally healthy subjects homozygous for this lysine (K) SNP have lactoferrin in their saliva that kills mutans streptococci and have reduced proximal decay. The review summarizes data supporting the ecologic plaque hypothesis and suggests that a genetic variant in lactoferrin with K in position 29 when found in saliva and crevice fluid can influence community biofilm composition. We propose that, for caries, this SNP is ethnicity independent and protective by directly killing caries-provoking bacteria (reducing proximal decay). However, the clinical effect of this SNP in LAP is ethnicity dependent, destructive (increases LAP incidence), and complex with mechanisms still to be determined.
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Affiliation(s)
- D H Fine
- Department of Oral Biology, Rutgers School of Dental Medicine, Rutgers University, Newark, NJ, USA
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Doetzer AD, Schlipf N, Alvim-Pereira F, Alvim-Pereira CC, Werneck R, Riess O, Bauer P, Trevilatto PC. Lactotransferrin Gene (LTF) Polymorphisms and Dental Implant Loss: A Case-Control Association Study. Clin Implant Dent Relat Res 2014; 17 Suppl 2:e550-61. [PMID: 25535701 DOI: 10.1111/cid.12284] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Dental implants have been widely used to replace missing teeth, accomplishing aesthetics and function. Due to its large use worldwide, the small percentage of implant loss becomes significant in number of cases. Lactotransferrin (LTF) is a pleiotropic protein, expressed in various body tissues and fluids, which modulates the host immune-inflammatory response and bone metabolism, and might be involved in dental implant osseointegration. Recently, a few studies have been investigating genetic aspects underlying dental implant failure. PURPOSE This case-control study aimed to investigate the association of genetic markers (tag SNPs) in LTF gene and clinical parameters with dental implant loss. MATERIAL AND METHODS 278 patients, both sexes, mean age 51 years old, divided into 184 without and 94 with implant loss, were genotyped for sixteen tag SNPs, representative of the whole LTF gene. Also, clinical oral and systemic parameters were analyzed. Univariate and Multivariate Logistic Regression model were used to analyze the results (p < .05). RESULTS No association was found between the tag SNPs and implant loss in the study population. Clinical association was found with medical treatment, hormonal reposition, edentulism, number of placed implants, plaque, calculus, and mobility. CONCLUSION Clinical variables, but not LTF gene polymorphisms, were associated with implant loss.
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Affiliation(s)
- Andrea Duarte Doetzer
- Core for Advanced Molecular Investigation (COMI), School of Health and Biosciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
| | - Nina Schlipf
- Department of Medical Genetics, University of Tübingen, Tübingen, Germany
| | - Fabiano Alvim-Pereira
- Department of Dentistry/Postgraduate Program in Science Applied to Health, UFS-Federal University of Sergipe, Lagarto, SE, Brazil
| | - Claudia Cristina Alvim-Pereira
- Department of Medicine/Postgraduate Program in Science Applied to Health, UFS-Federal University of Sergipe, Lagarto, SE, Brazil
| | - Renata Werneck
- Core for Advanced Molecular Investigation (COMI), School of Health and Biosciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
| | - Olaf Riess
- Department of Medical Genetics, University of Tübingen, Tübingen, Germany
| | - Peter Bauer
- Department of Medical Genetics, University of Tübingen, Tübingen, Germany
| | - Paula Cristina Trevilatto
- Core for Advanced Molecular Investigation (COMI), School of Health and Biosciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
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Ikuta T, Inagaki Y, Tanaka K, Saito T, Nakajima Y, Bando M, Kido JI, Nagata T. Gene polymorphism of β-defensin-1 is associated with susceptibility to periodontitis in Japanese. Odontology 2013; 103:66-74. [PMID: 24276427 DOI: 10.1007/s10266-013-0139-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Accepted: 10/23/2013] [Indexed: 12/13/2022]
Abstract
Periodontitis is a multifactorial disease associated with genetic and environmental factors. Single-nucleotide polymorphisms (SNPs) are associated with susceptibility to common diseases such as diabetes and periodontitis. Although the oral cavity is exposed to various organisms, the conditions are well controlled by innate and acquired immune systems. Antimicrobial peptides (AMPs) play an important role in the innate immune system; however, the association of AMP-SNPs with periodontitis has not been fully elucidated. This study investigated the relationship between AMP-SNPs and periodontitis in Japanese. One hundred and five Japanese subjects were recruited, which included patients with aggressive, severe, moderate and mild periodontitis, and age-matched healthy controls. Genomic DNA was isolated from peripheral blood and genotypes of SNPs of β-defensin-1 and lactoferrin genes (DEFB1: rs1799946, rs1800972 and rs11362; and LTF: rs1126478) were investigated using the PCR-Invader assay. Protein level of AMPs in gingival crevicular fluid (GCF) was quantified by ELISA. Case-control studies revealed that the -44 CC genotype of DEFB1 (rs1800972) was associated with periodontitis (OR 2.51), particularly with severe chronic periodontitis (OR 4.15) and with combined severe and moderate chronic periodontitis (OR 4.04). No statistical differences were found in other genotypes. The β-defensin-1 concentrations in GCF were significantly lower in subjects with the -44 CC genotype of DEFB1 than in those without this genotype. No significant differences between GCF concentrations of AMPs and other genotypes were detected. The -44 CC genotype of the β-defensin-1 gene (DEFB1 rs1800972) may be associated with susceptibility to chronic periodontitis in Japanese.
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Affiliation(s)
- Takahisa Ikuta
- Department of Periodontology and Endodontology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
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Alexander DB, Iigo M, Yamauchi K, Suzui M, Tsuda H. Lactoferrin: an alternative view of its role in human biological fluids. Biochem Cell Biol 2012; 90:279-306. [PMID: 22553915 DOI: 10.1139/o2012-013] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Lactoferrin is a major component of biologically important mucosal fluids and of the specific granules of neutrophils. Understanding its biological function is essential for understanding neutrophil- and mucosal-mediated immunity. In this review, we reevaluate the in vivo functions of human lactoferrin (hLF) emphasizing in vivo studies and in vitro studies performed in biologically relevant fluids. We discuss the evidence in the literature that supports (or does not support) proposed roles for hLF in mucosal immunity and in neutrophil function. We argue that the current literature supports a microbiostatic role, but not a microbicidal role, for hLF in vivo. The literature also supports a role for hLF in inhibiting colonization and infection of epithelial surfaces by microorganisms and in protecting tissues from neutrophil-mediated damage. Using this information, we briefly discuss hLF in the context of the complex biological fluids in which it is found.
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Affiliation(s)
- David B Alexander
- Laboratory of Nanotoxicology Project, Nagoya City University, 3-1 Tanabedohri, Mizuho-ku, Nagoya 467-8603, Japan.
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Morinha F, Albuquerque C, Requicha J, Dias I, Leitão J, Gut I, Guedes-Pinto H, Viegas C, Bastos E. Analysis of new lactotransferrin gene variants in a case-control study related to periodontal disease in dog. Mol Biol Rep 2011; 39:4673-81. [PMID: 21947848 DOI: 10.1007/s11033-011-1259-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 09/14/2011] [Indexed: 12/14/2022]
Abstract
The molecular and genetic research has contributed to a better understanding of the periodontal disease (PD) in humans and has shown that many genes play a role in the predisposition and progression of this complex disease. Variations in human lactotransferrin (LTF) gene appear to affect anti-microbial functions of this molecule, influencing the PD susceptibility. PD is also a major health problem in small animal practice, being the most common inflammatory disease found in dogs. Nevertheless, the research in genetic predisposition to PD is an unexplored subject in this species. This work aims to contribute to the characterization of the genetic basis of canine PD. In order to identify genetic variations and verify its association with PD, was performed a molecular analysis of LTF gene in a case-control approach, including 40 dogs in the PD cases group and 50 dogs in the control group. In this study were detected and characterized eight new single nucleotide variations in the dog LTF gene. Genotype and allele frequencies of these variations showed no statistically significant differences between the control and PD cases groups. Our data do not give evidence for the contribution of these LTF variations to the genetic background of canine PD. Nevertheless, the sequence variant L/15_g.411C > T leads to an aminoacid change (Proline to Leucine) and was predicted to be possibly damaging to the LTF protein. Further investigations would be of extreme value to clarify the biological importance of these new findings.
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Affiliation(s)
- Francisco Morinha
- IBB/CGB-UTAD (Institute for Biotechnology and Bioengineering, Centre of Genomics and Biotechnology, University of Trás-os-Montes e Alto Douro), Quinta de Prados, P.O. Box 1013, 5001-801, Vila Real, Portugal.
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Field LA, Love B, Deyarmin B, Hooke JA, Shriver CD, Ellsworth RE. Identification of differentially expressed genes in breast tumors from African American compared with Caucasian women. Cancer 2011; 118:1334-44. [PMID: 21800289 DOI: 10.1002/cncr.26405] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Revised: 05/06/2011] [Accepted: 06/10/2011] [Indexed: 12/27/2022]
Abstract
BACKGROUND Breast tumors from African American women have less favorable pathological characteristics and higher mortality rates than those of Caucasian women. Although socioeconomic status may influence prognosis, biological factors are also likely to contribute to tumor behavior. METHODS Patients with invasive breast cancer were matched by age, grade, and estrogen receptor status; patients with benign disease were matched by age and diagnosis type. RNA from laser microdissected tumors and whole-sectioned nonmalignant breast tissues was hybridized to HG U133A 2.0 microarrays. Data were analyzed using Partek Genomics Suite using a cutoff of P < .001, >1.5-fold change, and results were validated by quantitative real-time polymerase chain reaction. RESULTS Clinicopathological factors did not differ significantly between groups for age at diagnosis, tumor size or stage, lymph node or human epidermal growth receptor 2 status, intrinsic subtype, or mortality. Two-way analysis of the tumor specimens revealed 25 probes representing 23 genes differentially expressed between populations; hierarchical clustering classified 24 of 26 African American women and 25 of 26 Caucasian women correctly. In the nonmalignant specimens, 15 probes representing 13 genes were differentially expressed, including 5 genes that also differed in the tumor specimens; these genes were able to correctly classify nonmalignant breast specimens from 20 of 22 of African American women and all of the Caucasian women. CONCLUSIONS Despite matching of tumors by pathological characteristics, molecular profiles differed between African American women and Caucasian women in both invasive tumors and benign breast tissues. These differentially expressed genes, including CRYBB2, PSPHL, and SOS1, are involved in cellular growth and differentiation, invasion, metastasis, and immune response and thus may contribute to the poor outcome in African American women.
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Affiliation(s)
- Lori A Field
- Windber Research Institute, Windber, Pennsylvania, USA
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Brinkmann O, Zhang L, Giannobile WV, Wong DT. Salivary biomarkers for periodontal disease diagnostics. ACTA ACUST UNITED AC 2010; 5:25-35. [DOI: 10.1517/17530059.2011.542144] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Zhang L, Henson BS, Camargo PM, Wong DT. The clinical value of salivary biomarkers for periodontal disease. Periodontol 2000 2010; 51:25-37. [PMID: 19878467 DOI: 10.1111/j.1600-0757.2009.00315.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Wakabayashi H, Kondo I, Kobayashi T, Yamauchi K, Toida T, Iwatsuki K, Yoshie H. Periodontitis, periodontopathic bacteria and lactoferrin. Biometals 2010; 23:419-24. [PMID: 20155438 DOI: 10.1007/s10534-010-9304-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 02/03/2010] [Indexed: 11/28/2022]
Abstract
Lactoferrin (LF) is a component of saliva and is suspected to be a defense factor against oral pathogens including Streptococcus mutans and Candida albicans. Periodontitis is a very common oral disease caused by periodontopathic bacteria. Antimicrobial activities and other biological effects of LF against representative periodontopathic bacteria, Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, and Prevotella intermedia, have been widely studied. Association of polymorphisms in LF with incidence of aggressive periodontitis and the role of LF in the gingival crevicular fluid as a marker of periodontitis severity have also been reported. Periodontopathic bacteria reside as a biofilm in supragingival and subgingival plaque. Our recent study indicated that LF exhibits antibacterial activity against planktonic forms of P. gingivalis and P. intermedia at higher concentrations, and furthermore, LF effectively inhibits biofilm formation and reduces the established biofilm of these bacteria at physiological concentrations. A small-scale clinical study indicated that oral administration of bovine LF reduces P. gingivalis and P. intermedia in the subgingival plaque of chronic periodontitis patients. LF seems to be a biofilm inhibitor of periodontopathic bacteria in vitro and in vivo.
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Affiliation(s)
- Hiroyuki Wakabayashi
- Food Science and Technology Institute, Morinaga Milk Industry Co., Ltd, 5-1-83 Higashihara, Zama, Kanagawa 228-8583, Japan.
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Zhang W, Duan S, Bleibel WK, Wisel SA, Huang RS, Wu X, He L, Clark TA, Chen TX, Schweitzer AC, Blume JE, Dolan ME, Cox NJ. Identification of common genetic variants that account for transcript isoform variation between human populations. Hum Genet 2008; 125:81-93. [PMID: 19052777 DOI: 10.1007/s00439-008-0601-x] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Accepted: 11/23/2008] [Indexed: 12/22/2022]
Abstract
In addition to the differences between populations in transcriptional and translational regulation of genes, alternative pre-mRNA splicing (AS) is also likely to play an important role in regulating gene expression and generating variation in mRNA and protein isoforms. Recently, the genetic contribution to transcript isoform variation has been reported in individuals of recent European descent. We report here results of an investigation of the differences in AS patterns between human populations. AS patterns in 176 HapMap lymphoblastoid cell lines derived from individuals of European and African ancestry were evaluated using the Affymetrix GeneChip Human Exon 1.0 ST Array. A variety of biological processes such as response to stimulus and transcription were found to be enriched among the differentially spliced genes. The differentially spliced genes also include some involved in human diseases that have different prevalence or susceptibility between populations. The genetic contribution to the population differences in transcript isoform variation was then evaluated by a genome-wide association using the HapMap genotypic data on single nucleotide polymorphisms (SNPs). The results suggest that local and distant genetic variants account for a substantial fraction of the observed transcript isoform variation between human populations. Our findings provide new insights into the complexity of the human genome as well as the health disparities between the two populations.
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Affiliation(s)
- Wei Zhang
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Box MC6091, 5841 S. Maryland Ave., Chicago, IL 60637, USA.
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Wu YM, Juo SH, Ho YP, Ho KY, Yang YH, Tsai CC. Association between lactoferrin gene polymorphisms and aggressive periodontitis among Taiwanese patients. J Periodontal Res 2008; 44:418-24. [PMID: 18973542 DOI: 10.1111/j.1600-0765.2008.01120.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE A dramatic difference in the frequencies of the Lys/Arg single nucleotide polymorphism in the lactoferrin genotype between a small population of patients with localized juvenile periodontitis and healthy subjects has been reported. As the single nucleotide polymorphism could be associated with ethnicity, the present study aimed to investigate the association between polymorphisms of the lactoferrin gene and periodontitis. MATERIAL AND METHODS Sixty-five patients with aggressive periodontitis, 278 with chronic periodontitis and 88 healthy controls were genotyped for the Lys/Arg polymorphism of the lactoferrin gene at position 29 [reference sequence (rs) 1126478] in the N-terminal alpha-helical region. RESULTS The frequencies of the GG genotype and the G allele were highest in the aggressive periodontitis group, followed by the chronic periodontitis group and then the healthy controls. The frequency of the G allele was significantly higher in aggressive periodontitis and chronic periodontitis groups than in healthy controls (p = 0.0037 and 0.0212). Although the difference of the GG genotype distribution between subjects with chronic periodontitis and healthy controls did not reach significance, the distribution of genotypes between aggressive periodontitis and healthy controls was significantly different. The association of the gene polymorphism and aggressive periodontitis still existed, even after adjusting for age, gender and smoking status by logistic regression analysis (GG/AG+AA: odds ratio = 2.16, 95% confidence interval = 1.09-4.35, p = 0.0287). After the study, subjects were further stratified by their smoking status; the GG genotype was still significantly associated with the risk of aggressive periodontitis in the nonsmoking group (odds ratio = 2.69, p = 0.018). However, there were no statistical differences between chronic periodontitis vs. healthy controls and aggressive periodontitis vs. healthy controls in the smoking group. CONCLUSION The present study revealed that the A/G polymorphism in the lactoferrin gene might be associated with aggressive periodontitis. The A allele might reduce the risk of development of aggressive periodontitis in a Taiwanese population. Our results also support the hypothesis that lactoferrin genetic polymorphisms could play a role in the risk for periodontitis separate from the smoking factor. The functionality of this gene's polymorphisms has to be further elucidated.
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Affiliation(s)
- Y-M Wu
- Department of Periodontics, Chung-Ho Memorial Hospital, and Graduate Institute of Dental Sciences (Faulty of Dentistry), College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Zhang W, Duan S, Kistner EO, Bleibel WK, Huang RS, Clark TA, Chen TX, Schweitzer AC, Blume JE, Cox NJ, Dolan ME. Evaluation of genetic variation contributing to differences in gene expression between populations. Am J Hum Genet 2008; 82:631-40. [PMID: 18313023 DOI: 10.1016/j.ajhg.2007.12.015] [Citation(s) in RCA: 160] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2007] [Revised: 11/16/2007] [Accepted: 12/20/2007] [Indexed: 12/11/2022] Open
Abstract
Gene expression is a complex quantitative trait partially regulated by genetic variation in DNA sequence. Population differences in gene expression could contribute to some of the observed differences in susceptibility to common diseases and response to drug treatments. We characterized gene expression in the full set of HapMap lymphoblastoid cell lines derived from individuals of European and African ancestry for 9156 transcript clusters (gene-level) evaluated with the Affymetrix GeneChip Human Exon 1.0 ST Array. Gene expression was found to differ significantly between these samples for 383 transcript clusters. Biological processes including ribosome biogenesis and antimicrobial humoral response were found to be enriched in these differential genes, suggesting their possible roles in contributing to the population differences at a higher level than that of mRNA expression and in response to environmental information. Genome-wide association studies for local or distant genetic variants that correlate with the differentially expressed genes enabled identification of significant associations with one or more single-nucleotide polymorphisms (SNPs), consistent with the hypothesis that genetic factors and not simply population identity or other characteristics (age of cell lines, length of culture, etc.) contribute to differences in gene expression in these samples. Our results provide a comprehensive view of the genes differentially expressed between populations and the enriched biological processes involved in these genes. We also provide an evaluation of the contributions of genetic variation and nongenetic factors to the population differences in gene expression.
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Affiliation(s)
- Wei Zhang
- Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
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Ho YP, Lin YC, Yang YH, Ho KY, Wu YM, Tsai CC. Cyclooxygenase-2 Gene−765 single nucleotide polymorphism as a protective factor against periodontitis in Taiwanese. J Clin Periodontol 2007; 35:1-8. [DOI: 10.1111/j.1600-051x.2007.01167.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Keijser S, Jager MJ, Dogterom-Ballering HCM, Schoonderwoerd DT, de Keizer RJW, Krose CJM, Houwing-Duistermaat JJ, van der Plas MJA, van Dissel JT, Nibbering PH. Lactoferrin Glu561Asp polymorphism is associated with susceptibility to herpes simplex keratitis. Exp Eye Res 2007; 86:105-9. [PMID: 18022620 DOI: 10.1016/j.exer.2007.09.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2007] [Revised: 09/23/2007] [Accepted: 09/28/2007] [Indexed: 01/25/2023]
Abstract
Lactoferrin plays an important role in the defense against infections, including herpes simplex virus (HSV) keratitis. We studied the impact of three single nucleotide polymorphisms in the human lactoferrin gene on the susceptibility to HSV infections of the eye and the severity of such infections. Lactoferrin gene polymorphisms were determined by PCR combined with restriction fragment length analysis in 105 HSV keratitis patients and 145 control subjects. Bilateral tear samples were harvested from 50 patients and 40 healthy controls and tear lactoferrin concentrations were determined by ELISA. Patients' records were used to acquire information about the severity of the HSV keratitis. The frequencies of the Glu561Asp polymorphism, but not those of the Ala11Thr and Lys29Arg polymorphisms, differed significantly between patients and control subjects with an under-representation of the Asp561 allele in the patient group. Furthermore, the values for best corrected visual acuity, frequency of recurrences since onset, and average duration of clinical episodes did not differ among patients with various lactoferrin genotypes. In addition, tear lactoferrin concentrations were the same in patients with HSV keratitis and healthy controls and also did not differ among patients with various lactoferrin genotypes. Lactoferrin Glu561Asp polymorphism is associated with the susceptibility to HSV keratitis with a protective role for lactoferrin variants comprising Asp561. However, no beneficial effects of this lactoferrin variant on the clinical outcome of ocular HSV keratitis were noted.
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Affiliation(s)
- S Keijser
- Department of Ophthalmology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands
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Zarember KA, Sugui JA, Chang YC, Kwon-Chung KJ, Gallin JI. Human polymorphonuclear leukocytes inhibit Aspergillus fumigatus conidial growth by lactoferrin-mediated iron depletion. THE JOURNAL OF IMMUNOLOGY 2007; 178:6367-73. [PMID: 17475866 DOI: 10.4049/jimmunol.178.10.6367] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Aspergillus fumigatus, a common mold, rarely infects humans, except during prolonged neutropenia or in cases of chronic granulomatous disease (CGD), a primary immunodeficiency caused by mutations in the NADPH oxidase that normally produces fungicidal reactive oxygen species. Filamentous hyphae of Aspergillus are killed by normal, but not CGD polymorphonuclear leukocytes (PMN); however, the few studies on PMN-mediated host defenses against infectious conidia (spores) of this organism have yielded conflicting results, some showing that PMN do not inhibit conidial growth, with others showing that they do, most likely using reactive oxygen species. Given that CGD patients are exposed daily to hundreds of viable A. fumigatus conidia, yet considerable numbers of them survive years without infection, we reasoned that PMN use ROS-independent mechanisms to combat Aspergillus. We show that human PMN from both normal controls and CGD patients are equipotent at arresting the growth of Aspergillus conidia in vitro, indicating the presence of a reactive oxygen species-independent factor(s). Cell-free supernatants of degranulated normal and CGD neutrophils both suppressed fungal growth and were found to be rich in lactoferrin, an abundant PMN secondary granule protein. Purified iron-poor lactoferrin at concentrations occurring in PMN supernatants (and reported in human mucosal secretions in vivo) decreased fungal growth, whereas saturation of lactoferrin or PMN supernatants with iron, or testing in the presence of excess iron in the form of ferritin, completely abolished activity against conidia. These results demonstrate that PMN lactoferrin sequestration of iron is important for host defense against Aspergillus.
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Affiliation(s)
- Kol A Zarember
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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Teng CT, Gladwell W. Single nucleotide polymorphisms (SNPs) in human lactoferrin gene. Biochem Cell Biol 2006; 84:381-4. [PMID: 16936811 DOI: 10.1139/o06-035] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The lactoferrin protein possesses antimicrobial and antiviral activities. It is also involved in the modulation of the immune response. In a normal healthy individual, lactoferrin plays a role in the front-line host defense against infection and in immune and inflammatory responses. Whether genomic variations, such as single nucleotide polymorphisms (SNPs), have an effect on the structure and function of lactoferrin protein and whether these variations contribute to the different susceptibility of individuals in response to environmental insults are interesting health-related issues. In this study, the lactoferrin gene was resequenced as part of the Environmental Genome Project of the National Institute of Environmental Health Sciences, which operates within the National Institutes of Health. Ninety-one healthy donors of different ethnicities were used to establish common SNPs in the exons of the lactoferrin gene in the general population. The data will serve as a basis from which study the association of lactoferrin polymorphism and disease.
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Affiliation(s)
- Christina T Teng
- Gene Regulation Section, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, 111 TW Alexander, PO Box 12233, NC 27709, USA.
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