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De Bartolo MI, Belvisi D, Mancinelli R, Costanzo M, Caturano C, Leodori G, Berardelli A, Fabbrini G, Vivacqua G. A systematic review of salivary biomarkers in Parkinson's disease. Neural Regen Res 2024; 19:2613-2625. [PMID: 38595280 PMCID: PMC11168506 DOI: 10.4103/nrr.nrr-d-23-01677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/25/2023] [Accepted: 01/25/2024] [Indexed: 04/11/2024] Open
Abstract
The search for reliable and easily accessible biomarkers in Parkinson's disease is receiving a growing emphasis, to detect neurodegeneration from the prodromal phase and to enforce disease-modifying therapies. Despite the need for non-invasively accessible biomarkers, the majority of the studies have pointed to cerebrospinal fluid or peripheral biopsies biomarkers, which require invasive collection procedures. Saliva represents an easily accessible biofluid and an incredibly wide source of molecular biomarkers. In the present study, after presenting the morphological and biological bases for looking at saliva in the search of biomarkers for Parkinson's disease, we systematically reviewed the results achieved so far in the saliva of different cohorts of Parkinson's disease patients. A comprehensive literature search on PubMed and SCOPUS led to the discovery of 289 articles. After screening and exclusion, 34 relevant articles were derived for systematic review. Alpha-synuclein, the histopathological hallmark of Parkinson's disease, has been the most investigated Parkinson's disease biomarker in saliva, with oligomeric alpha-synuclein consistently found increased in Parkinson's disease patients in comparison to healthy controls, while conflicting results have been reported regarding the levels of total alpha-synuclein and phosphorylated alpha-synuclein, and few studies described an increased oligomeric alpha-synuclein/total alpha-synuclein ratio in Parkinson's disease. Beyond alpha-synuclein, other biomarkers targeting different molecular pathways have been explored in the saliva of Parkinson's disease patients: total tau, phosphorylated tau, amyloid-β1-42 (pathological protein aggregation biomarkers); DJ-1, heme-oxygenase-1, metabolites (altered energy homeostasis biomarkers); MAPLC-3beta (aberrant proteostasis biomarker); cortisol, tumor necrosis factor-alpha (inflammation biomarkers); DNA methylation, miRNA (DNA/RNA defects biomarkers); acetylcholinesterase activity (synaptic and neuronal network dysfunction biomarkers); Raman spectra, proteome, and caffeine. Despite a few studies investigating biomarkers targeting molecular pathways different from alpha-synuclein in Parkinson's disease, these results should be replicated and observed in studies on larger cohorts, considering the potential role of these biomarkers in determining the molecular variance among Parkinson's disease subtypes. Although the need for standardization in sample collection and processing, salivary-based biomarkers studies have reported encouraging results, calling for large-scale longitudinal studies and multicentric assessments, given the great molecular potentials and the non-invasive accessibility of saliva.
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Affiliation(s)
| | - Daniele Belvisi
- IRCCS Neuromed, Pozzilli, Italy
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Romina Mancinelli
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, Sapienza University of Rome, Rome, Italy
| | | | - Claudia Caturano
- Department of Experimental Morphology and Microscopy -Integrated Research Center (PRAAB) -Campus Biomedico University of Rome, Rome, Italy
| | - Giorgio Leodori
- IRCCS Neuromed, Pozzilli, Italy
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Alfredo Berardelli
- IRCCS Neuromed, Pozzilli, Italy
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Giovanni Fabbrini
- IRCCS Neuromed, Pozzilli, Italy
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Giorgio Vivacqua
- Department of Experimental Morphology and Microscopy -Integrated Research Center (PRAAB) -Campus Biomedico University of Rome, Rome, Italy
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Chen Y, Chen H, Han C, Ou H, Zhan X. The structure and proteomic analysis of byssus in Pteria penguin: Insights into byssus evolution and formation. J Proteomics 2024; 307:105267. [PMID: 39089615 DOI: 10.1016/j.jprot.2024.105267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 07/27/2024] [Accepted: 07/28/2024] [Indexed: 08/04/2024]
Abstract
Byssus is a unique external structure in sessile bivalves and is critical for settlement and metamorphosis. However, little is known about the stout byssus in Pteria penguin. We explored the byssus structure and proteins using scanning electron microscopy and proteomics, respectively. The results revealed that P. penguin byssus has a dense and highly aligned fiber inner core, and the outer cuticle contains protein granules embedded in the protein matrix. Proteomic analysis revealed 31 proteins in the byssus, among which 15 differentially expressed proteins were mainly enriched in the EGF/EGF-like and laminin EGF-like domains. Foot proteins were enriched in the EF-hand, immunoglobulin, and fibronectin domains. All these domains can participate in protein-protein and/or protein-metal interactions in the extracellular matrix (ECM), which, together with the seven types of ECM proteins detected in the byssus, supports the hypothesis that the byssus is derived from the ECM. We also found that in vitro acellular structures of the byssus and the shell shared commonalities in their formation processes. These results are useful for further understanding byssus evolution and the characterization of byssus-related proteins. SIGNIFICANCE: This manuscript investigates the structure and the origin of Pteria penguin byssus, given that byssus is vital to provide critical protection for reproduction and even against environmental stresses that affect survival. However, there is rare research on byssus protein composition. Hence, though scanning electron microscopy and proteomics, we discovered that P. penguin byssus possesses the dense and highly aligned fiber inner core, and the outer cuticle has protein granules embedded in the protein matrix. Proteomic analysis showed that there were 31 proteins in the byssus, among which 15 proteins were mainly enriched in the EGF/EGF-like and TSP-1 domains. Foot proteins closely related to byssus formation were enriched in EF hand, immunoglobulin, and fibronectin domains. These domains are able to participate in protein-protein and/or protein-metal interactions in the extracellular matrix (ECM), which together with the seven types of ECM proteins detected in byssus support the hypothesis that byssus derive from the ECM. We also found in vitro acellular structures the byssus and the shell share commonalities in their formation processes. These results were useful for further understanding the byssus evolution and the characterization of the byssus-related proteins.
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Affiliation(s)
- Yi Chen
- School of Ecology, Hainan University, Haikou 570228, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan University, Haikou 570228, China
| | - Hengda Chen
- School of Marine Biology and Fisheries, Hainan University, Haikou 570228, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan University, Haikou 570228, China
| | - Changqing Han
- School of Marine Biology and Fisheries, Hainan University, Haikou 570228, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan University, Haikou 570228, China
| | - Huilong Ou
- School of Marine Biology and Fisheries, Hainan University, Haikou 570228, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan University, Haikou 570228, China
| | - Xin Zhan
- School of Marine Biology and Fisheries, Hainan University, Haikou 570228, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan University, Haikou 570228, China.
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Winter C, Tetyczka C, Pham DT, Kolb D, Leitinger G, Schönfelder S, Kunert O, Gerlza T, Kungl A, Bucar F, Roblegg E. Investigation of Hydrocolloid Plant Polysaccharides as Potential Candidates to Mimic the Functions of MUC5B in Saliva. Pharmaceutics 2024; 16:682. [PMID: 38794344 PMCID: PMC11124828 DOI: 10.3390/pharmaceutics16050682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/26/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024] Open
Abstract
The successful substitution of complex physiological fluids, such as human saliva, remains a major challenge in drug development. Although there are a large number of saliva substitutes on the market, their efficacy is often inadequate due to short residence time in the mouth, unpleasant mouthfeel, or insufficient protection of the teeth. Therefore, systems need to be identified that mimic the functions of saliva, in particular the salivary mucin MUC5B and the unique physiological properties of saliva. To this end, plant extracts known to contain hydrocolloid polysaccharides and to have mucus-forming properties were studied to evaluate their suitability as saliva substitutes. The aqueous plant extracts of Calendula officinalis, Fucus sp. thalli, and lichenan from Lichen islandicus were examined for composition using a range of techniques, including GC-MS, NMR, SEC, assessment of pH, osmolality, buffering capacity, viscoelasticity, viscoelastic interactions with human saliva, hydrocolloid network formation, and in vitro cell adhesion. For this purpose, a physiologically adapted adhesive test was developed using human buccal epithelial cells. The results show that lichenan is the most promising candidate to mimic the properties of MUC5B. By adjusting the pH, osmolality, and buffering capacity with K2HPO4, it was shown that lichenan exhibited high cell adhesion, with a maximum detachment force that was comparable to that of unstimulated whole mouth saliva.
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Affiliation(s)
- Christina Winter
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Technology and Biopharmacy, University of Graz, Universitätsplatz 1, 8010 Graz, Austria; (C.W.); (C.T.)
- Research Center Pharmaceutical Engineering GmbH, Inffeldgasse 13, 8010 Graz, Austria
| | - Carolin Tetyczka
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Technology and Biopharmacy, University of Graz, Universitätsplatz 1, 8010 Graz, Austria; (C.W.); (C.T.)
- Research Center Pharmaceutical Engineering GmbH, Inffeldgasse 13, 8010 Graz, Austria
| | - Duy Toan Pham
- Department of Health Sciences, College of Natural Sciences, Can Tho University, Can Tho 900000, Vietnam;
| | - Dagmar Kolb
- Core Facility Ultrastructure Analysis, Center for Medical Research, Medical University of Graz, Neue Stiftingtalstrasse 6/VI, 8010 Graz, Austria;
| | - Gerd Leitinger
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/V, 8010 Graz, Austria;
| | - Sandra Schönfelder
- Institute of Pharmaceutical Sciences, Department of Pharmacognosy, University of Graz, Beethovenstraße 8, 8010 Graz, Austria; (S.S.); (F.B.)
| | - Olaf Kunert
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Schubertstraße 1, 8010 Graz, Austria; (O.K.); (T.G.); (A.K.)
| | - Tanja Gerlza
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Schubertstraße 1, 8010 Graz, Austria; (O.K.); (T.G.); (A.K.)
| | - Andreas Kungl
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Schubertstraße 1, 8010 Graz, Austria; (O.K.); (T.G.); (A.K.)
| | - Franz Bucar
- Institute of Pharmaceutical Sciences, Department of Pharmacognosy, University of Graz, Beethovenstraße 8, 8010 Graz, Austria; (S.S.); (F.B.)
| | - Eva Roblegg
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Technology and Biopharmacy, University of Graz, Universitätsplatz 1, 8010 Graz, Austria; (C.W.); (C.T.)
- Research Center Pharmaceutical Engineering GmbH, Inffeldgasse 13, 8010 Graz, Austria
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Lu N, Haykal N, McCoy JL, Tobey ABJ. Use of botox for sialorrhea and dysphagia in the neonatal population. Am J Otolaryngol 2024; 45:104210. [PMID: 38241761 DOI: 10.1016/j.amjoto.2023.104210] [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: 09/13/2023] [Accepted: 11/28/2023] [Indexed: 01/21/2024]
Abstract
INTRODUCTION Botox is frequently used for sialorrhea in patients with compromised airways and those with etiologies causing difficulty with secretion management (i.e. strokes, neurologic disorders, etc.). There are no published studies regarding the use of botulinum toxin (BoNT) in the neonate population. We aim to discuss our experience and safety of BoNT use in the neonate population in regards to alleviating secretion management and airway protection. METHODS Retrospective review of neonates admitted to the neonatal intensive care unit (NICU) ≤12 months of age who received BoNT injection to submandibular (SMG) and parotid (PG) glands for sialorrhea/dysphagia. BoNT was administered under ultrasound (u/s) guidance by interventional radiology. RESULTS 6 children were examined. 2 (33 %) were male. Avg NICU stay was 87.5 ± 33.1 days. 2 underwent surgical airway intervention prior to injection. Mean age at initial BoNT was 1.5 ± 0.7 months. Avg weight at injection was 4 ± 1.1 kg. Each PG and SMG were injected in 5/6 cases. Bilateral SMG were unidentified on u/s in 1 case and thus not injected. Dose range injected per gland was 5-15u. 100 % required tube feeds, 50 % with tubes distal to stomach (NJT/NDT). 83 % were completely NPO prior to injection and there was no noted clinical improvement in oral skills post injection. All had noted desats/apneas prior to injection and 83 % had reported decreased events post injection. 50 % had reported decrease O2 requirements and frequent suctioning 2wks after injection, however 2 (33 %) required surgical airway intervention after injection (trach, SGP/MDO). 4/6 (67 %) trialed medical therapy, anticholinergics being the most common. 50 % underwent 2nd injection (age = 6.5 ± 0.3 months) avg. 4.7 ± 0.7mo after 1st injection, and the same 3pts underwent 3rd injection (age = 12.5 ± 2.4 months) avg. 6.1 ± 2.5mo after 2nd injection. 1 pt. had a total 6 injections. There were no injection related complications. CONCLUSION BoNT injection is a safe, non-invasive alterative for management of sialorrhea in neonates. Further extensive study needs to be performed to identify the optimal dose per gland in this population.
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Affiliation(s)
- Nathan Lu
- University of Pittsburgh Medical Center, Children's Hospital of Pittsburgh, Department of Otolaryngology, Pittsburgh, PA, United States of America.
| | - Nadine Haykal
- University of Pittsburgh Medical Center, Children's Hospital of Pittsburgh, Department of Otolaryngology, Pittsburgh, PA, United States of America
| | - Jennifer L McCoy
- University of Pittsburgh Medical Center, Children's Hospital of Pittsburgh, Department of Otolaryngology, Pittsburgh, PA, United States of America
| | - Allison B J Tobey
- University of Pittsburgh Medical Center, Children's Hospital of Pittsburgh, Department of Otolaryngology, Pittsburgh, PA, United States of America
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Jost WH, Bäumer T, Bevot A, Birkmann U, Buhmann C, Grosheva M, Guntinas-Lichius O, Laskawi R, Paus S, Pflug C, Schroeder AS, Spittau B, Steffen A, Wilken B, Winterholler M, Berweck S. Botulinum neurotoxin type A in the interdisciplinary treatment of sialorrhea in adults and children-update and practice recommendations. Front Neurol 2023; 14:1275807. [PMID: 38162447 PMCID: PMC10757066 DOI: 10.3389/fneur.2023.1275807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 11/14/2023] [Indexed: 01/03/2024] Open
Abstract
Sialorrhea is defined as a chronic excessive flow of saliva from the mouth, often with adverse consequences for health and quality of life of patients. In addition to currently used non-drug treatment and systemic drugs, intraglandular Botulinum Neurotoxin A (BoNT/A) injections have been examined in case studies, controlled trials and clinical practice. Two pivotal Phase III trials recently led to market approval in the USA and EU for IncobotulinumtoxinA [Xeomin®, IncoBoNT/A, Clostridium botulinum neurotoxin type A (150 kD), free from complexing proteins, Merz Pharmaceuticals GmbH] for treatment of chronic sialorrhea in adults and pediatric patients. This review provides a multidisciplinary approach to discuss the current state of sialorrhea therapy as well as benefits and current limitations of BoNT/A injections. A consensus regarding treatment recommendations made available to physicians in Germany in 2022 has now been updated here for presentation to an international audience. This review provides a framework including a flow chart for patient selection, recommendations for dosing and the injection process, as well as a discussion of therapeutic goals, long-term benefits and safety aspects. This review is aimed at supporting physicians in developing multidisciplinary and individualized treatment approaches to achieve optimal benefits for patients.
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Affiliation(s)
| | - Tobias Bäumer
- Institute of Systemic Motor Science, CBBM, University of Lübeck, Lübeck, Germany
| | - Andrea Bevot
- Department of Neuropediatrics and Developmental Medicine, University Children’s Hospital Tübingen, Tübingen, Germany
| | - Ulrich Birkmann
- Department of Neurology, Schluckambulanz, GFO Clinics Troisdorf, Troisdorf, Germany
| | - Carsten Buhmann
- Department of Neurology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Maria Grosheva
- Department of Otorhinolaryngology, Head and Neck Surgery, Medical Faculty, University of Cologne, Cologne, Germany
| | | | - Rainer Laskawi
- Department of Otorhinolaryngology, University Hospital Göttingen, Göttingen, Germany
| | - Sebastian Paus
- Department of Neurology, GFO Clinics Troisdorf, Troisdorf, Germany
| | - Christina Pflug
- Department of Voice, Speech and Hearing Disorders, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - A. Sebastian Schroeder
- Clinic for Child Neurology and Social Pediatrics, Child Center Maulbronn, Maulbronn, Germany
| | - Björn Spittau
- Anatomy and Cell Biology, Medical School OWL, Bielefeld University, Bielefeld, Germany
| | - Armin Steffen
- Department for Otorhinolaryngology, University of Lübeck, Lübeck, Germany
| | - Bernd Wilken
- Department of Pediatric Neurology, Klinikum Kassel, Kassel, Germany
| | - Martin Winterholler
- Department of Neurology, Sana Hospital Rummelsberg, Nuremberg/Schwarzenbruck, Germany
| | - Steffen Berweck
- Specialist Center for Pediatric Neurology, Neurorehabilitation and Epileptology, Schön Clinic, Vogtareuth, Germany
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Fine DH, Schreiner H. Oral microbial interactions from an ecological perspective: a narrative review. FRONTIERS IN ORAL HEALTH 2023; 4:1229118. [PMID: 37771470 PMCID: PMC10527376 DOI: 10.3389/froh.2023.1229118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/16/2023] [Indexed: 09/30/2023] Open
Abstract
Landscape ecology is a relatively new field of study within the sub-specialty of ecology that considers time and space in addition to structure and function. Landscape ecology contends that both the configuration (spatial pattern) and the composition (organisms both at the macro and or micro level) of an ecology can change over time. The oral cavity is an ideal place to study landscape ecology because of the variety of landscapes, the dynamic nature of plaque biofilm development, and the easy access to biofilm material. This review is intended to provide some specific clinical examples of how landscape ecology can influence the understanding of oral diseases and act as a supplement to diagnosis and treatment. The purpose of this review is two-fold; (1) to illustrate how landscape ecology can be used to clarify the two most prominent microbiologically induced infections in the oral cavity, and (2) how studies of oral microbiology can be used to enhance the understanding of landscape ecology. The review will distinguish between "habitat" and "niche" in a landscape and extend the concept that a "patch", is the demarcating unit of a habitat within a landscape. The review will describe how; (1) an individual patch, defined by its shape, edges and internal components can have an influence on species within the patch, (2) spatial dynamics over time within a patch can lead to variations or diversities of species within that patch space, and (3) an unwelcoming environment can promote species extinction or departure/dispersion into a more favorable habitat. Understanding this dynamic in relationship to caries and periodontal disease is the focus of this review.
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Affiliation(s)
- Daniel H. Fine
- Department of Oral Biology, Rutgers School of Dental Medicine, Newark, NJ, United States
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Castillo-Lopez E, Pacífico C, Sener-Aydemir A, Hummel K, Nöbauer K, Ricci S, Rivera-Chacon R, Reisinger N, Razzazi-Fazeli E, Zebeli Q, Kreuzer-Redmer S. Diet and phytogenic supplementation substantially modulate the salivary proteome in dairy cows. J Proteomics 2023; 273:104795. [PMID: 36535624 DOI: 10.1016/j.jprot.2022.104795] [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: 08/19/2022] [Revised: 11/30/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022]
Abstract
Phytogenic compounds may influence salivation or salivary properties. However, their effects on the bovine salivary proteome have not been evaluated. We investigated changes in the bovine salivary proteome due to transition from forage to high-concentrate diet, with and without supplementation with a phytogenic feed additive. Eight non-lactating cows were fed forage, then transitioned to a 65% concentrate diet (DM basis) over a week. Cows were control (n = 4, CON) or supplemented with a phytogenic feed additive (n = 4, PHY). Proteomic analysis was conducted using liquid chromatography coupled with mass spectrometry. We identified 1233 proteins; 878 were bovine proteins, 189 corresponded to bacteria, and 166 were plant proteins. Between forage and high-concentrate, 139 proteins were differentially abundant (P < 0.05), with 48 proteins having a log2FC difference > |2|. The salivary proteome reflected shifts in processes involving nutrient utilization, body tissue accretion, and immune response. Between PHY and CON, 195 proteins were differently abundant (P < 0.05), with 37 having a log2FC difference > |2|; 86 proteins were increased by PHY, including proteins involved in smell recognition. Many differentially abundant proteins correlated (r > |0.70|) with salivary bicarbonate, total mucins or pH. Results provide novel insights into the bovine salivary proteome using a non-invasive approach, and the association of specific proteins with major salivary properties influencing rumen homeostasis. SIGNIFICANCE: Phytogenic compounds may stimulate salivation due to their olfactory properties, but their effects on the salivary proteome have not been investigated. We investigated the effect of high-concentrate diets and supplementation with a phytogenic additive on the salivary proteome of cows. We show that analysis of cows' saliva can be a non-invasive approach to detect effects occurring not only in the gut, but also systemically including indications for gut health and immune response. Thus, results provide unique insights into the bovine salivary proteome, and will have a crucial contribution to further understand animal response in terms of nutrient utilization and immune activity due to the change from forage to a high-energy diet. Additionally, our findings reveal changes due to supplementation with a phytogenic feed additive with regard to health and olfactory stimulation. Furthermore, findings suggest an association between salivary proteins and other components like bicarbonate content.
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Affiliation(s)
- Ezequias Castillo-Lopez
- University of Veterinary Medicine Vienna, Institute of Animal Nutrition and Functional Plant Compounds, Christian Doppler Laboratory for Innovative Gut Health Concepts of Livestock, Vienna, Austria.
| | - Cátia Pacífico
- University of Veterinary Medicine Vienna, Institute of Animal Nutrition and Functional Plant Compounds, Christian Doppler Laboratory for Innovative Gut Health Concepts of Livestock, Vienna, Austria
| | - Arife Sener-Aydemir
- University of Veterinary Medicine Vienna, Institute of Animal Nutrition and Functional Plant Compounds, Christian Doppler Laboratory for Innovative Gut Health Concepts of Livestock, Vienna, Austria
| | - Karin Hummel
- University of Veterinary Medicine Vienna, VetCore Facility (Proteomics), Vienna, Austria
| | - Katharina Nöbauer
- University of Veterinary Medicine Vienna, VetCore Facility (Proteomics), Vienna, Austria
| | - Sara Ricci
- University of Veterinary Medicine Vienna, Institute of Animal Nutrition and Functional Plant Compounds, Christian Doppler Laboratory for Innovative Gut Health Concepts of Livestock, Vienna, Austria
| | - Raul Rivera-Chacon
- University of Veterinary Medicine Vienna, Institute of Animal Nutrition and Functional Plant Compounds, Christian Doppler Laboratory for Innovative Gut Health Concepts of Livestock, Vienna, Austria
| | | | - Ebrahim Razzazi-Fazeli
- University of Veterinary Medicine Vienna, VetCore Facility (Proteomics), Vienna, Austria
| | - Qendrim Zebeli
- University of Veterinary Medicine Vienna, Institute of Animal Nutrition and Functional Plant Compounds, Christian Doppler Laboratory for Innovative Gut Health Concepts of Livestock, Vienna, Austria
| | - Susanne Kreuzer-Redmer
- University of Veterinary Medicine Vienna, Institute of Animal Nutrition and Functional Plant Compounds, Nutrigenomics Unit, Vienna, Austria.
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Chibly AM, Aure MH, Patel VN, Hoffman MP. Salivary gland function, development, and regeneration. Physiol Rev 2022; 102:1495-1552. [PMID: 35343828 PMCID: PMC9126227 DOI: 10.1152/physrev.00015.2021] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 11/27/2021] [Accepted: 03/17/2022] [Indexed: 02/08/2023] Open
Abstract
Salivary glands produce and secrete saliva, which is essential for maintaining oral health and overall health. Understanding both the unique structure and physiological function of salivary glands, as well as how they are affected by disease and injury, will direct the development of therapy to repair and regenerate them. Significant recent advances, particularly in the OMICS field, increase our understanding of how salivary glands develop at the cellular, molecular, and genetic levels: the signaling pathways involved, the dynamics of progenitor cell lineages in development, homeostasis, and regeneration, and the role of the extracellular matrix microenvironment. These provide a template for cell and gene therapies as well as bioengineering approaches to repair or regenerate salivary function.
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Affiliation(s)
- Alejandro M Chibly
- Matrix and Morphogenesis Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
| | - Marit H Aure
- Matrix and Morphogenesis Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
| | - Vaishali N Patel
- Matrix and Morphogenesis Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
| | - Matthew P Hoffman
- Matrix and Morphogenesis Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
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Lima BP, Davies JR, Wickström C, Johnstone KF, Hall JW, Svensater G, Herzberg MC. Streptococcus gordonii Poised for Glycan Feeding through a MUC5B-Discriminating, Lipoteichoic Acid-Mediated Outside-In Signaling Circuit. J Bacteriol 2022; 204:e0011822. [PMID: 35652671 PMCID: PMC9210975 DOI: 10.1128/jb.00118-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/09/2022] [Indexed: 11/20/2022] Open
Abstract
Many oral bacteria employ cell wall-anchored adhesins to bind to the salivary films coating the teeth and mucosal surfaces. Surface binding prevents clearance and facilitates catabolism of salivary film glycoproteins. We asked whether Streptococcus gordonii adhesin expression changes in response to surface salivary cues using a eukaryote-like, outside-in recognition and signaling circuit. To determine whether the cues were discriminated, S. gordonii was tested during cell adhesion and biofilm formation on a MUC5B-rich or lower-molecular-mass salivary fraction or an uncoated abiotic surface. Cells were recovered and analyzed for differences in gene expression and proteins in cell wall fractions. In salivary-free conditions, planktonic S. gordonii presented three prominent cell wall LPXTG-motif proteins, SGO_1487, SGO_0890, and MbpA (mucin-binding protein A; SGO_0707). During biofilm formation on MUC5B-coated surfaces, MbpA, a MUC5B-binding protein, and key genes in the tagatose and quorum-sensing pathways were strongly promoted. The response to MUC5B required the two-component system (TCS), streptococcal regulator of adhesins sensor and regulator (SraSR, SGO_1180/81), lipoteichoic acid (LTA), and the homologous paired adhesins, SspA and SspB (SspAB). LTA appears to link the outside signal (MUC5B) to intramembrane SraSR. Tagatose pathway gene expression may poise cells to metabolize MUC5B glycans and, with a quorum-sensing gene (luxS), may direct formation of a consortium to facilitate glycan cross-feeding by S. gordonii. We now show that a Gram-positive bacterium discriminates specific surface environmental cues using an outside-in signaling mechanism to apparently optimize colonization of saliva-coated surfaces. IMPORTANCE All organisms throughout the tree of life sense and respond to their surface environments. To discriminate among mucosal surface environmental cues, we report that Streptococcus gordonii recognizes a high-molecular-weight mucin glycoprotein, MUC5B, using the paired adhesins SspAB and lipoteichoic acid; the latter bridges the outside signal to an intramembrane two-component system to transcriptionally regulate a MUC5B-specific adhesin and genes that may facilitate glycan catabolism.
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Affiliation(s)
- Bruno P. Lima
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Julia R. Davies
- Section for Oral Biology and Pathology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Claes Wickström
- Section for Oral Biology and Pathology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Karen F. Johnstone
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jeffrey W. Hall
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Gunnel Svensater
- Section for Oral Biology and Pathology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Mark C. Herzberg
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
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10
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Chafin JB, Bayazid L. Pediatric Salivary Gland Disease. Pediatr Clin North Am 2022; 69:363-380. [PMID: 35337545 DOI: 10.1016/j.pcl.2022.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Salivary gland disease in the pediatric population is rare, yet it encompasses a wide spectrum of disease. It is estimated that 4.3% of salivary gland disease occurs in the pediatric population, with most classified as nonneoplastic. Further extrapolation reveals that 5% of salivary gland neoplastic diseases occur in patients younger than 20 years. Moreover, salivary gland tumors represent 1% of all head and neck tumors across all ages. Regardless, clinicians across all fields should be familiar with the workup of various pediatric salivary gland diseases and appropriate referral to a pediatric otolaryngologist.
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Affiliation(s)
- James Brett Chafin
- Department of Pediatric Otolaryngology-Head & Neck Surgery, Nemours Children's Health System, 807 Childrens Way 4th Floor, Jacksonville, FL 32207, USA.
| | - Leith Bayazid
- Department of Otolaryngology-Head and Neck Surgery, University of South Florida College of Medicine, 12901 Bruce B. Downs Boulevard, MDC 73, Tampa, FL 33612, USA
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11
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Siqueira WL, Canales MP, Crosara KTB, Marin LM, Xiao Y. Proteome difference among the salivary proteins adsorbed onto metallic orthodontic brackets and hydroxyapatite discs. PLoS One 2021; 16:e0254909. [PMID: 34319997 PMCID: PMC8318307 DOI: 10.1371/journal.pone.0254909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 07/06/2021] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to investigate the atomic composition and the proteome of the salivary proteins adsorbed on the surface of orthodontic metallic bracket. For this, the atomic composition of orthodontic metallic brackets was analyzed with X-ray Photoelectron Spectroscopy (XPS). The acquired bracket pellicle was characterized after brackets were immersed in human whole saliva supernatant for 2 hours at 37°C. Hydroxyapatite (HA) discs were used as a control. Acquired pellicle was harvested from the HA discs (n = 12) and from the metallic brackets (n = 12). Proteomics based on mass spectrometry technology was used for salivary protein identification and characterization. Results showed that most of the proteins adsorbed on the surface of orthodontic metallic brackets and on the HA discs were identified specifically to each group, indicating a small overlapping between the salivary proteins on each study group. A total of 311 proteins present on the HA discs were unique to this group while 253 proteins were unique to metallic brackets, and only 45 proteins were common to the two groups. Even though most proteins were unique to each study group, proteins related to antimicrobial activity, lubrication, and remineralization were present in both groups. These findings demonstrate that the salivary proteins adsorbed on the bracket surface are dependent on the material molecular composition.
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Affiliation(s)
- Walter Luiz Siqueira
- College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada
- * E-mail:
| | - Maria Pia Canales
- Schulich Dentistry & Medicine, The University of Western Ontario, London, ON, Canada
| | | | - Lina Maria Marin
- College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada
| | - Yizhi Xiao
- Schulich Dentistry & Medicine, The University of Western Ontario, London, ON, Canada
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12
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Photoinactivation of Staphylococci with 405 nm Light in a Trachea Model with Saliva Substitute at 37 °C. Healthcare (Basel) 2021; 9:healthcare9030310. [PMID: 33799642 PMCID: PMC7998829 DOI: 10.3390/healthcare9030310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/28/2021] [Accepted: 03/04/2021] [Indexed: 02/03/2023] Open
Abstract
The globally observed rise in bacterial resistance against antibiotics has increased the need for alternatives to antibiotic treatments. The most prominent and important pathogen bacteria are the ESKAPE pathogens, which include among others Staphylococcus aureus, Klebsiella pneumoniae and Acinetobacter baumannii. These species cause ventilator-associated pneumonia (VAP), which accounts for 24% of all nosocomial infections. In this study we tested the efficacy of photoinactivation with 405 nm violet light under conditions comparable to an intubated patient with artificial saliva for bacterial suspension at 37 °C. A technical trachea model was developed to investigate the visible light photoinactivation of Staphylococcus carnosus as a non-pathogen surrogate of the ESKAPE pathogen S. aureus (MRSA). The violet light was coupled into the tube with a fiber optic setup. The performed tests proved, that photoinactivation at 37 °C is more effective with a reduction of almost 3 log levels (99.8%) compared to 25 °C with a reduction of 1.2 log levels. The substitution of phosphate buffered saline (PBS) by artificial saliva solution slightly increased the efficiency during the experimental course. The increased efficiency might be caused by a less favorable environment for bacteria due to for example the ionic composition.
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13
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Investigation of Changes in Saliva in Radiotherapy-Induced Head Neck Cancer Patients. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18041629. [PMID: 33572065 PMCID: PMC7914760 DOI: 10.3390/ijerph18041629] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 12/12/2022]
Abstract
The intact function of the salivary glands is of utmost importance for oral health. During radiotherapy in patients with head and neck tumors, the salivary glands can be damaged, causing the composition of saliva to change. This leads to xerostomia, which is a primary contributor to oral mucositis. Medications used for protective or palliative treatment often show poor efficacy as radiation-induced changes in the physico-chemical properties of saliva are not well understood. To improve treatment options, this study aimed to carefully examine unstimulated whole saliva of patients receiving radiation therapy and compare it with healthy unstimulated whole saliva. To this end, the pH, osmolality, electrical conductivity, buffer capacity, the whole protein and mucin concentrations, and the viscoelastic and adhesive properties were investigated. Moreover, hyaluronic acid was examined as a potential candidate for a saliva replacement fluid. The results showed that the pH of radiation-induced saliva shifted from neutral to acidic, the osmolality increased and the viscoelastic properties changed due to a disruption of the mucin network and a change in water secretion from the salivary glands. By adopting an aqueous 0.25% hyaluronic acid formulation regarding the lost properties, similar adhesion characteristics as in healthy, unstimulated saliva could be achieved.
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14
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Aspinall SR, Parker JK, Khutoryanskiy VV. Oral care product formulations, properties and challenges. Colloids Surf B Biointerfaces 2021; 200:111567. [PMID: 33454623 DOI: 10.1016/j.colsurfb.2021.111567] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/01/2021] [Accepted: 01/05/2021] [Indexed: 12/13/2022]
Abstract
This review explores the physical, chemical and structural properties of key components of oral care products, whilst looking at the challenges which need to be overcome to continue to improve the efficacy of oral care, and improve dental health. Oral care has been an essential part of all populations and cultures around the world for thousands of years. To maintain good oral health, dental plaque causing bacteria and malodour must be controlled whilst also strengthening and protecting the teeth to prevent dental caries. Advanced modern formulations need to provide controlled and extended release of ingredients vital for dental health. With modern day products such as toothpastes and mouthwashes, it has never been easier to maintain good oral hygiene and health, yet the incidence of dental caries is still on the rise. The complex formulations of modern toothpastes and mouthwashes makes them one of the most sophisticated pharmaceutical products on the market today. The demands of the consumer coupled with the complexity of the oral cavity make it one of the most challenging development processes.
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Affiliation(s)
- Sam R Aspinall
- Department of Pharmacy, University of Reading, Whiteknights, Reading, UK
| | - Jane K Parker
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, UK
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15
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Hakami Z, Hand AR. Expression of aquaporin 5 during murine palatine glands development: a light and electron microscopic immunocytochemical study. Eur J Oral Sci 2020; 128:379-385. [PMID: 32812295 DOI: 10.1111/eos.12734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2020] [Indexed: 11/28/2022]
Abstract
Although aquaporin 5 (AQP5) seems to play a role in cytodifferentiation and cell proliferation during the development of salivary glands, its distribution during minor salivary glands development has been scarcely reported. This study examined the temporal-spatial distribution of AQP5 in the developing rat palatine glands using light and electron microscopy. At embryonic (E) age E18, AQP5 labeling was observed on the cell membranes of some terminal bulb cells. After lumenization at E20, AQP5 labeled the apical membrane in acini where a lumen existed, in addition to displaying positive diffuse cytoplasmic and cell membrane staining. At the electron microscopic level, AQP5 labeled the supranuclear cytoplasm and the luminal microvilli along the apical membrane. At birth, AQP5 was also localized to the lateral membranes associated ultrastructurally with the microvilli of intercellular canaliculi. After postnatal (PN) day PN7, mucous acini and serous demilunes showed reactivity. AQP5 reached peak reactivity around PN13 with a similar staining pattern in all acini, but had reduced dramatically by PN21. Thereafter, AQP5 reactivity was mainly associated with serous cells in adults. In conclusion, the transitory expression of AQP5 during palatine glands development may reflect changing physiological functions of the secretory cells and/or AQP5 throughout the maturation of the glands.
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Affiliation(s)
- Zaki Hakami
- Division of Orthodontics, Department of Preventive Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Arthur R Hand
- Departments of Craniofacial Sciences and Cell Biology, School of Dental Medicine, UConn Health, Farmington, CT, USA
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16
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Kashyap B, Kullaa AM. Regulation of mucin 1 expression and its relationship with oral diseases. Arch Oral Biol 2020; 117:104791. [PMID: 32652493 DOI: 10.1016/j.archoralbio.2020.104791] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 05/05/2020] [Accepted: 05/29/2020] [Indexed: 02/08/2023]
Abstract
OBJECTIVE The aim of this study is to describe the polymorphic mucin 1 (MUC1), and to provide an overview of the known complex and multiple functions of MUC1 in normal oral mucosa and oral mucosal lesions in compromised situations as well as exploring the challenges associated with the heterogeneous nature of MUC1. We will review the current knowledge and provide insights into the future management possibilities of using MUC1 as a therapeutic agent. METHODS A literature search of the electronic databases included MEDLINE (1966 -December 2019) and hand searches of cross-references were undertaken using terms related to mucins, MUC1. RESULTS MUC1 is a large transmembrane glycoprotein expressed on the apical surface of most of epithelial cell surfaces. Not only is it involved in lubrication, cell surface hydration, and protection against degrading enzymes, MUC1 also promotes abnormal cellular signalling, angiogenesis, anti-adhesion and tumorigenesis. Aberrant glycosylation, overexpression, loss of apical constraint are characteristics of the transformation of a normal cell to a cancerous cell. This review summarizes studies of MUC1 expression and function with a special emphasis on oral epithelial cells in normal and abnormal conditions. In addition, current knowledge of MUC1 and unexplored areas of MUC1 are presented. CONCLUSION MUC1 is an archetypical transmembrane protein, the presence of MUC1 in ectopic regions may lead to dysregulation of certain enzymes and activation of various pathways, favouring the development of inflammatory responses and tumour formation. This review examines the potential of MUC1 in the development of future therapeutics.
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Affiliation(s)
- Bina Kashyap
- Institute of Dentistry, University of Eastern Finland, Kuopio Campus, and Educational Dental Clinic, Kuopio University Hospital, Kuopio, Finland.
| | - Arja M Kullaa
- Department of Oral Diagnostic Sciences, Institute of Dentistry, Faculty of Health Sciences, University of Eastern Finland, Kuopio Campus, Finland.
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17
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Carter BG, Foegeding EA, Drake MA. Invited review: Astringency in whey protein beverages. J Dairy Sci 2020; 103:5793-5804. [PMID: 32448585 DOI: 10.3168/jds.2020-18303] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 03/05/2020] [Indexed: 01/08/2023]
Abstract
Astringency is the sensation of mouth drying and puckering, and it has also been described as a loss of lubrication in the mouth. Astringency is perceived as an increase in oral friction or roughness. Astringency caused by tannins and other polyphenols has been well documented and studied. Whey proteins are popular for their functional and nutritional quality, but they exhibit astringency, particularly under acidic conditions popular in high acid (pH 3.4) whey protein beverages. Acids cause astringency, but acidic protein beverages have higher astringency than acid alone. Whey proteins are able to interact with salivary proteins, which removes the lubricating saliva layer of the mouth. Whey proteins can also interact directly with epithelial tissue. These various mechanisms of astringency limit whey protein ingredient applications because astringency is undesirable to consumers. A better understanding of the causes of whey protein astringency will improve our ability to produce products that have high consumer liking and deliver excellent nutrition.
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Affiliation(s)
- B G Carter
- Department of Food, Bioprocessing and Nutrition Sciences, Southeast Dairy Foods Research Center, North Carolina State University, Raleigh 27695
| | - E A Foegeding
- Department of Food, Bioprocessing and Nutrition Sciences, Southeast Dairy Foods Research Center, North Carolina State University, Raleigh 27695
| | - M A Drake
- Department of Food, Bioprocessing and Nutrition Sciences, Southeast Dairy Foods Research Center, North Carolina State University, Raleigh 27695.
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18
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Urbanowicz M, Sadowska K, Pijanowska DG, Pomećko R, Bocheńska M. Potentiometric Solid-Contact Ion-Selective Electrode for Determination of Thiocyanate in Human Saliva. SENSORS (BASEL, SWITZERLAND) 2020; 20:E2817. [PMID: 32429165 PMCID: PMC7288078 DOI: 10.3390/s20102817] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/06/2020] [Accepted: 05/12/2020] [Indexed: 12/13/2022]
Abstract
A new solid-contact potentiometric ion-selective electrode for the determination of SCN- (SCN-ISE) has been described. Synthesized phosphonium derivative of calix[4]arene was used as a charged ionophore. The research included selection of the ion-selective membrane composition, determination of the ISEs metrological parameters and SCN-ISE application for thiocyanate determination in human saliva. Preparation of the ISEs included selection of a plasticizer for the ion-selective membrane composition and type of the electrode material. The study was carried out using ISE with liquid internal electrolyte (LE-ISE) and solid-contact electrodes made of glassy carbon (GC-ISE) and gold rods (Au-ISE). The best parameters were found for GC sensors for which the ion-selective membrane contained chloroparaffin as a plasticizer (S = 59.9 mV/dec, LOD = 1.6 ´ 10-6 M). The study of potentiometric selectivity coefficients has shown that the thiocyanate-selective sensor could be applied in biomedical research for determination of SCN- concentration in human saliva. The accuracy of the SCN- determination was verified by testing 59 samples of volunteers' saliva by potentiometric sensors and UV-Vis spectrophotometry as a reference technique. Moreover, SCN- concentrations in the smokers' and non-smokers' saliva were compared. In order to investigate the influence of various factors (sex, health status, taken medications) on the thiocyanate level in the saliva, more extensive studies on a group of 100 volunteers were carried out. Additionally, for a group of 18 volunteers, individual profiles of SCN- concentration in saliva measured on a daily basis for over a month were collected.
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Affiliation(s)
- Marcin Urbanowicz
- Nalecz Institute of Biocybernetics and Biomedical Engineering Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland; (K.S.); (D.G.P.)
| | - Kamila Sadowska
- Nalecz Institute of Biocybernetics and Biomedical Engineering Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland; (K.S.); (D.G.P.)
| | - Dorota G. Pijanowska
- Nalecz Institute of Biocybernetics and Biomedical Engineering Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland; (K.S.); (D.G.P.)
| | - Radosław Pomećko
- Department of Chemistry and Technology of Functional Materials, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (R.P.); (M.B.)
| | - Maria Bocheńska
- Department of Chemistry and Technology of Functional Materials, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (R.P.); (M.B.)
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19
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Gardner A, So P, Carpenter G. Endogenous salivary citrate is associated with enhanced rheological properties following oral capsaicin stimulation. Exp Physiol 2020; 105:96-107. [PMID: 31705555 PMCID: PMC6973168 DOI: 10.1113/ep088166] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 11/04/2019] [Indexed: 12/14/2022]
Abstract
NEW FINDINGS What is the central question of this study? What are the relationships between physical properties of saliva, protein composition and metabolite composition? What is the main finding and its importance? Salivary citrate, one of the major endogenous metabolites in saliva, increased upon capsaicin stimulation and was associated with improved physical properties measured by extensional rheology. This suggests salivary gland citrate transporters might be a valuable area of future study. ABSTRACT Saliva displays viscoelastic properties which enable coating, lubrication and protection of the oral mucosa and hard tissues. Individuals lacking saliva or perceiving oral dryness can manage their symptoms using artificial saliva preparations, but these often fail to mimic the sensation and functionality of natural saliva. It is widely acknowledged that mucins (MUC7 and MUC5B) confer saliva's rheological properties, but artificial saliva containing purified mucins is still often an inadequate substitute. This work aimed to explore salivary components that influence salivary extensional rheology to better understand how natural saliva could be replicated. Saliva was stimulated via control and capsaicin solutions in healthy volunteers. Extensional rheology was analysed using a CaBER-1 (capillary breakup) extensional rheometer. Protein composition, including mucins, was measured by gel-electrophoresis band densitometry and metabolites were measured by 1 H nuclear magnetic resonance spectroscopy. Capsaicin stimulation significantly increased capillary breakup time, extensional viscosity and the abundance of most major salivary proteins. Stimulation also increased salivary citrate and choline concentrations. Significant correlations were found between capillary breakup time and amylase (r = 0.67, P < 0.05), statherin (ρ = 0.66, P < 0.05) and citrate (ρ = 0.81, P < 0.01). The relationship between citrate and salivary rheology was subsequently investigated in vitro. These results suggest that citrate and non-mucin proteins are stronger predictors of salivary rheology than the more often studied mucin glycoproteins. Potential mechanisms are discussed and future work in this area could help formulate more effective saliva substitutes, more closely resembling natural saliva.
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Affiliation(s)
- Alexander Gardner
- Salivary Research, Centre for Host‐Microbiome InteractionsFaculty of Dental, Oral & Craniofacial SciencesKing's College LondonLondonUK
- Department of Restorative Dentistry, Dental Hospital and SchoolUniversity of DundeeDundeeUK
| | - Po‐Wah So
- Department of Neuroimaging, Institute of PsychiatryPsychology and Neuroscience, King's College LondonMaurice Wohl Clinical Neuroscience InstituteLondonUK
| | - Guy Carpenter
- Salivary Research, Centre for Host‐Microbiome InteractionsFaculty of Dental, Oral & Craniofacial SciencesKing's College LondonLondonUK
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20
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Jost WH, Bäumer T, Laskawi R, Slawek J, Spittau B, Steffen A, Winterholler M, Bavikatte G. Therapy of Sialorrhea with Botulinum Neurotoxin. Neurol Ther 2019; 8:273-288. [PMID: 31542879 PMCID: PMC6858891 DOI: 10.1007/s40120-019-00155-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Indexed: 12/11/2022] Open
Abstract
Botulinum neurotoxin (BoNT) is considered the treatment of choice for various symptoms and diseases such as focal dystonia and focal spasticity. The effects of BoNT on the salivary glands have also been known for years, but their use was limited because of a lack of approval studies. Now the indication of sialorrhea is approved in some countries for incobotulinumtoxinA, such as the USA and Europe, and therapy could also become the treatment of choice. According to the pivotal study, a dose of 100 units of incobotulinumtoxinA, which is divided into the parotid and submandibular glands, is recommended. RimabotulinumtoxinB is approved in the USA only. To define the value of this therapy, we must consider anatomy, physiology, and available therapies. Therapy includes conservative measures such as functional dysphagia therapy, oral or transdermal application of anticholinergics, and, in selected cases, radiotherapy and surgical procedures. A combination of different approaches is optional. On the basis of the evidence and clinical experience, BoNT injections will be the first line of pharmacotherapy for chronic sialorrhea.
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Affiliation(s)
| | - Tobias Bäumer
- Paediatric and Adult Movement Disorders and Neuropsychiatry, Institut of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Rainer Laskawi
- ENT Department, University Medical Center, Göttingen, Germany
| | - Jaroslaw Slawek
- Neurology Department, Medical University of Gdansk, Gdańsk, Poland
| | - Björn Spittau
- Center for Transdisciplinary Neurosciences Rostock (CTNR), University of Rostock, Rostock, Germany
| | - Armin Steffen
- Department for Otorhinolaryngology, University of Lübeck, UKSH, Lübeck, Germany
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21
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Ahmed A, Gulino A, Amayo S, Arancio W, Florena AM, Belmonte B, Jurjus A, Leone A, Miletich I. Natriuretic peptide system expression in murine and human submandibular salivary glands: a study of the spatial localisation of ANB, BNP, CNP and their receptors. J Mol Histol 2019; 51:3-13. [PMID: 31722080 DOI: 10.1007/s10735-019-09849-5] [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: 07/19/2019] [Accepted: 10/18/2019] [Indexed: 11/30/2022]
Abstract
The natriuretic peptide (NP) system comprises of three ligands, the Atrial Natriuretic Peptide (ANP), Brain Natriuretic peptide (BNP) and C-type Natriuretic peptide (CNP), and three natriuretic peptide receptors, NPRA, NPRB and NPRC. Here we present a comprehensive study of the natriuretic peptide system in healthy murine and human submandibular salivary glands (SMGs). We show CNP is the dominant NP in mouse and human SMG and is expressed together with NP receptors in ducts, autonomic nerves and the microvasculature of the gland, suggesting CNP autocrine signalling may take place in some of these glandular structures. These data suggest the NP system may control salivary gland function during homeostasis through the regulation of electrolyte re-absorption, neural stimulation and/or blood vessel wall contraction/relaxation. We also show abnormal expression of NPRA in the stroma of a subset of human SMGs resected from patients diagnosed with oral squamous cell carcinoma (OSCC) of non-salivary gland origin. This finding warrants further research to investigate a possible correlation between early OSCC invasion and NPRA overexpression.
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Affiliation(s)
- Araz Ahmed
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, Guy's Hospital, Floor 27 Guy's Tower, London, SE1 9RT, UK
| | - Alessandro Gulino
- Dipartimento Di Promozione Della Salute, Materno-Infantile, Medicina Interna E Specialistica Di Eccellenza "G. D'Alessandro", University of Palermo, Palermo, Italy
| | - Simita Amayo
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, Guy's Hospital, Floor 27 Guy's Tower, London, SE1 9RT, UK
| | - Walter Arancio
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale delle Scienze, 90128, Palermo, Italy
| | - Ada Maria Florena
- Dipartimento Di Promozione Della Salute, Materno-Infantile, Medicina Interna E Specialistica Di Eccellenza "G. D'Alessandro", University of Palermo, Palermo, Italy
| | - Beatrice Belmonte
- Dipartimento Di Promozione Della Salute, Materno-Infantile, Medicina Interna E Specialistica Di Eccellenza "G. D'Alessandro", University of Palermo, Palermo, Italy
| | - Abdo Jurjus
- Department of Anatomy, Cell Biology and Physiology, American University of Beirut, Beirut, Lebanon
| | - Angelo Leone
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, Guy's Hospital, Floor 27 Guy's Tower, London, SE1 9RT, UK. .,Department of Biomedicine, Neuroscience and Advanced Diagnostic, Bi.N.D, School of Medicine, Institute of Anatomy and Histology, University of Palermo, Palermo, Italy.
| | - Isabelle Miletich
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, Guy's Hospital, Floor 27 Guy's Tower, London, SE1 9RT, UK.
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22
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Spirk C, Hartl S, Pritz E, Gugatschka M, Kolb-Lenz D, Leitinger G, Roblegg E. Comprehensive investigation of saliva replacement liquids for the treatment of xerostomia. Int J Pharm 2019; 571:118759. [PMID: 31622744 DOI: 10.1016/j.ijpharm.2019.118759] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 01/20/2023]
Abstract
The sensation of dry mouth also referred to as xerostomia is becoming increasingly common worldwide. Current treatment strategies include topical agents, sialagogues and saliva substitutes. The latter have been reported to be ineffective as special physicochemical features of natural saliva have so far been ignored (e.g., buffer capacity, osmolality, etc.). The aim of this study was to comprehensively investigate the most relevant physicochemical properties of three products frequently used in the clinics and compare them to unstimulated whole saliva (UWS). Sialin-Sigma®, Glandomed® and Xylitol CVS HealthTM Dry Mouth Spray were characterized regarding their pH, osmolality, electrical conductivity, buffer capacity, rheological behaviour, microstructure, surface tension and wettability and compared to UWS. The influence of residual saliva was examined under consideration of the conditions of xerostomia to assess whether the quantity given in the instruction for use is appropriate. All three products showed significant differences to UWS regarding the values received. Only Xylitol CVS HealthTM Dry Mouth Spray showed a comparable wettability. It could be further determined that the recommended doses were too low. These data can not only be used for an improved understanding of saliva, but also for the development of a replacement fluid to successfully alleviate xerostomia.
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Affiliation(s)
- C Spirk
- Institute of Pharmaceutical Sciences, Pharmaceutical Technology and Biopharmacy, University of Graz, Universitätsplatz 1, 8010 Graz, Austria
| | - S Hartl
- Institute of Pharmaceutical Sciences, Pharmaceutical Technology and Biopharmacy, University of Graz, Universitätsplatz 1, 8010 Graz, Austria
| | - E Pritz
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/II, 8010 Graz, Austria
| | - M Gugatschka
- Division of Phoniatrics, Medical University of Graz, Auenbruggerplatz 26, 8036 Graz, Austria
| | - D Kolb-Lenz
- Core Facility Ultrastructure Analysis, Center for Medical Research, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/II, 8010 Graz, Austria
| | - G Leitinger
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/II, 8010 Graz, Austria
| | - E Roblegg
- Institute of Pharmaceutical Sciences, Pharmaceutical Technology and Biopharmacy, University of Graz, Universitätsplatz 1, 8010 Graz, Austria; Research Center Pharmaceutical Engineering GmbH, Inffeldgasse 13, 8010 Graz, Austria.
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23
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Acharya S, Jin C, Bylund J, Shen Q, Kamali-Moghaddam M, Jontell M, Carlén A, Karlsson NG. Reduced sialyl-Lewis x on salivary MUC7 from patients with burning mouth syndrome. Mol Omics 2019; 15:331-339. [PMID: 31414088 DOI: 10.1039/c9mo00061e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We analysed and compared MUC7 O-glycosylation and inflammatory biomarkers in saliva from female patients with burning mouth syndrome (BMS) and gender/age-matched controls. Oligosaccharides from salivary MUC7 from BMS and controls were released. Inflammatory mediators were measured by multiplex proximity extension assay. Presence of sialyl-Lewisx (Si-Lex) epitope on MUC7 was confirmed using Western blot. MUC7 O-glycans and measured inflammatory biomarkers were found to be similar between BMS and controls. However, oligosaccharides sialyl-Lewisx (Si-Lex) was found to be reduced in samples from BMS patients. Positive correlation (combined patients and controls) was found between levels of C-C motif chemokine 19 (CCL-19) and the amount of core-2 oligosaccharides on MUC7 as well as fractalkine (CX3CL1) and level of sialylation. Patients with BMS were shown to represent a heterogeneous group in terms of inflammatory biomarkers. This indicates that BMS patients could be further stratified on the basis of low-level inflammation. The results furthermore indicate that reduced sialylation of MUC7, particularly Si-Lex, may be an important feature in patients with BMS. However, the functional aspects and potential involvement in immune regulation of Si-Lex remains unclear. Our data suggests a chemokine driven alteration of MUC7 glycosylation.
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Affiliation(s)
- Shikha Acharya
- Department of Oral Microbiology and Immunology, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, PO 450, 40530, Gothenburg, Sweden.
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24
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Łysik D, Niemirowicz-Laskowska K, Bucki R, Tokajuk G, Mystkowska J. Artificial Saliva: Challenges and Future Perspectives for the Treatment of Xerostomia. Int J Mol Sci 2019; 20:E3199. [PMID: 31261876 PMCID: PMC6651665 DOI: 10.3390/ijms20133199] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/21/2019] [Accepted: 06/28/2019] [Indexed: 12/16/2022] Open
Abstract
The chronic sensation of a dry mouth is a disease condition called xerostomia and affects a large part of the population. Xerostomia is associated with decreased secretion, or more often, qualitative changes in saliva proteins and immunoglobulin concentrations that develop as a result of salivary gland dysfunction. Several reasons causing dry mouth were described, and usually, they include taking medications, diseases or radiotherapy. In some situations, when it is difficult to use salivary stimulants or salivary gland damage is irreversible, the only option might seem to be saliva substitutes. The paper presents the most important aspects considering saliva preparations. The rheological and lubricating properties and the reconstruction of the complex saliva structure has been the main purpose of research. The biological properties of saliva preparations were also widely discussed. As part of the work, the antimicrobial effect of three commercial saliva preparations was tested. Finally, inadequate antimicrobial properties against the strains isolated from the oral cavity were demonstrated. The development of salivary substitutes, in particular, the improvement of antimicrobial properties, can be achieved using nanotechnology, including drug delivery systems containing nanocarriers.
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Affiliation(s)
- Dawid Łysik
- Department of Materials Engineering and Production, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland
| | | | - Robert Bucki
- Department of Microbiological and Nanobiomedical Engineering, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland
| | - Grażyna Tokajuk
- Department of Integrated Dentistry, Medical University of Bialystok, M. Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland
| | - Joanna Mystkowska
- Department of Materials Engineering and Production, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland.
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25
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Trombley TM, Agarwal SC, Beauchesne PD, Goodson C, Candilio F, Coppa A, Rubini M. Making sense of medieval mouths: Investigating sex differences of dental pathological lesions in a late medieval Italian community. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 169:253-269. [PMID: 30924143 DOI: 10.1002/ajpa.23821] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 02/21/2019] [Accepted: 03/02/2019] [Indexed: 02/06/2023]
Abstract
OBJECTIVES Bioarchaeological investigations of sex-based differences in the prevalence of dental pathological lesions, particularly caries, have drawn considerable attention, and out of this work, two dominant models have emerged. Traditionally, the first model interprets sex-related patterns in caries as a product of gendered differences in diet. A more recent model interprets a generally higher propensity for caries prevalence in females in light of reproductive ecology. To test the hypothesis that females have higher risk of caries in accordance with reproductive ecology, we examined and analyzed caries prevalence and other potentially synergistic oral pathological lesions in a late medieval (A.D. 1300-1500) Italian archaeological sample. MATERIALS AND METHODS We examined sex- and age-related prevalence in caries and other oral pathological lesions in a late medieval Italian skeletal assemblage excavated from Villamagna consisting of 38 females and 37 males (n = 1,534 teeth). We examined age- and sex-related patterns in six dental traits: antemortem tooth loss, caries, calculus, periapical inflammation, tooth wear, and periodontitis. RESULTS Significant age-related increases in antemortem tooth loss, caries, calculus, and tooth wear were observed in both males and females. However, there was a lack of expected sex differences in oral pathological lesions, with instead older males exhibiting significantly more antemortem tooth loss and corrected caries than females. DISCUSSION Results are discussed in relation to the ethnohistoric context of medieval rural dietary practices as well as biomedical salivary literature, which suggest that dietary changes throughout the life course may have facilitated trade-offs that buffered females from higher rates of dental pathological lesions.
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Affiliation(s)
- Trent M Trombley
- Department of Anthropology, University of California, Berkeley, Berkeley, California
| | - Sabrina C Agarwal
- Department of Anthropology, University of California, Berkeley, Berkeley, California
| | - Patrick D Beauchesne
- Department of Behavioral Sciences, University of Michigan, Dearborn, Dearborn, Michigan
| | - Caroline Goodson
- Faculty of History, University of Cambridge, King's College, Cambridge, United Kingdom
| | - Francesca Candilio
- Anthropological Service, Soprintendenza Archeologia, Belle Arti e Paesaggio per la città metropolitana di Cagliari e le province di Oristano e Sud Sardegna, Cagliari, Italy.,Physical Anthropology Section, University of Pennsylvania Museum of Archaeology and Anthropology, Philadelphia, Pennsylvania
| | - Alfredo Coppa
- Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
| | - Mauro Rubini
- Department of Archaeology, Foggia University, Foggia, Italy.,Anthropological Service, S.A.B.A.P.-LAZ, Rome, Italy
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26
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Ji S, Samara NL, Revoredo L, Zhang L, Tran DT, Muirhead K, Tabak LA, Ten Hagen KG. A molecular switch orchestrates enzyme specificity and secretory granule morphology. Nat Commun 2018; 9:3508. [PMID: 30158631 PMCID: PMC6115407 DOI: 10.1038/s41467-018-05978-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 08/01/2018] [Indexed: 12/22/2022] Open
Abstract
Regulated secretion is an essential process where molecules destined for export are directed to membranous secretory granules, where they undergo packaging and maturation. Here, we identify a gene (pgant9) that influences the structure and shape of secretory granules within the Drosophila salivary gland. Loss of pgant9, which encodes an O-glycosyltransferase, results in secretory granules with an irregular, shard-like morphology, and altered glycosylation of cargo. Interestingly, pgant9 undergoes a splicing event that acts as a molecular switch to alter the charge of a loop controlling access to the active site of the enzyme. The splice variant with the negatively charged loop glycosylates the positively charged secretory cargo and rescues secretory granule morphology. Our study highlights a mechanism for dictating substrate specificity within the O-glycosyltransferase enzyme family. Moreover, our in vitro and in vivo studies suggest that the glycosylation status of secretory cargo influences the morphology of maturing secretory granules.
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Affiliation(s)
- Suena Ji
- Developmental Glycobiology Section, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA
| | - Nadine L Samara
- Section on Biological Chemistry, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA
| | - Leslie Revoredo
- Developmental Glycobiology Section, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA
| | - Liping Zhang
- Developmental Glycobiology Section, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA
| | - Duy T Tran
- Section on Biological Chemistry, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA
| | - Kayla Muirhead
- Developmental Glycobiology Section, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA
| | - Lawrence A Tabak
- Section on Biological Chemistry, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA
| | - Kelly G Ten Hagen
- Developmental Glycobiology Section, NIDCR, National Institutes of Health, 30 Convent Drive, Bethesda, MD, 20892-4370, USA.
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27
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An ex vivo salivary lubrication system to mimic xerostomic conditions and to predict the lubricating properties of xerostomia relieving agents. Sci Rep 2018; 8:9087. [PMID: 29904095 PMCID: PMC6002370 DOI: 10.1038/s41598-018-27380-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 05/25/2018] [Indexed: 12/14/2022] Open
Abstract
Advances in medical research has resulted in successful treatment of many life-threatening infectious diseases as well as autoimmune and lifestyle-related diseases, increasing life-expectancy of both the developed and developing world. As a result of a growing ageing population, the focus has also turned on chronic diseases which seriously affect the quality of older patient life. Xerostomia (dry mouth) is one such condition, which leads to bad oral health and difficulty in consumption of dry foods and speech. Saliva substitutes are used to ease symptoms. However, they often don’t work properly and objective comparison of saliva substitutes to mimic natural salivary functions does not exist. The study thus aims to develop an ex vivo friction assay simulating dry mouth conditions and facilitating objective comparison of saliva substitutes. A reciprocating sliding tongue-enamel system was developed and compared to a PDMS (polydimethylsiloxane)-PDMS friction system. The tongue-enamel system, but not the PDMS-PDMS model, showed high mucin-containing saliva (unstimulated and submandibular/sublingual saliva) to give higher Relief than mucin-poor lubricants (water, parotid saliva, Dentaid Xeros) and correlated well (r = 0.97) with in vivo mouth feel. The tongue-enamel friction system mimicked dry mouth conditions and relief and seems suited to test agents meant to lubricate desiccated oral surfaces.
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28
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Nagler R. Altered Salivary Profile in Heavy Smokers and its Possible Connection to Oral Cancer. Int J Biol Markers 2018; 22:274-80. [DOI: 10.1177/172460080702200406] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Saliva is the first biological fluid to encounter inhaled cigarette smoke, whose numerous carcinogens and oxidants are responsible for the oral cancer so prevalent among smokers. Whole saliva, collected from 25 consenting heavy smokers and from a control group of 25 age- and gender-matched non-smokers, was subjected to sialochemical, biochemical, immunological and oxidative analyses. The mean flow rate was significantly higher in smokers than in non-smokers, as were the median activity value of superoxide dismutase (SOD) and the total salivary antioxidant capacity (ImAnOx) (by 32% and 12%, respectively, p=0.05). The salivary carbonyl concentration (an oxidative stress indicator) was significantly higher by 126% (p=0.0006) among smokers, while lactate dehydrogenase, albumin, total immunoglobulin G, and the metalloproteinases MMP-2 and MMP-9 concentrations were significantly lower in the smokers, by 86% (p=0.003), 65% (p=0.003), 61% (p=0.048), 35% (p=0.005) and 55% (p=0.035), respectively. Apparently, the oral cavity's salivary antioxidant system fails to cope with the severe attack of reactive oxygen species originating in cigarette smoke. Moreover, various other salivary functional and protective parameters also decreased among the smokers. Hence, further research aimed at examining the possibility of administration of agents as antioxidants or saliva substitutes to the oral cavity of smokers should be considered.
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Affiliation(s)
- R.M. Nagler
- Department of Oral & Maxillofacial Surgery and Oral Biochemistry Laboratory, Rambam Medical Center and Faculty of Medicine, Technion-Israel Institute of Technology, Haifa - Israel
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29
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Hawkins PG, Kadam AS, Jackson WC, Eisbruch A. Organ-Sparing in Radiotherapy for Head-and-Neck Cancer: Improving Quality of Life. Semin Radiat Oncol 2018; 28:46-52. [DOI: 10.1016/j.semradonc.2017.08.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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30
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Fonseca-Santos B, Chorilli M. An overview of polymeric dosage forms in buccal drug delivery: State of art, design of formulations and their in vivo performance evaluation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [PMID: 29525088 DOI: 10.1016/j.msec.2017.12.022] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Owing to the ease of the administration, the oral cavity is an attractive site for the delivery of drugs. The main difficulty for administration via the buccal route is an effective physiological removal mechanism of the oral cavity that takes way the formulation from the buccal site and decreases the bioavailability of drugs. The use of mucoadhesive polymers in buccal drug delivery shows assessing buccal drug permeation and absorption, however some studies bring an in vivo performance. This review points to the use of polymers in the manufacture of drug delivery systems (hydrogels, films and tablets) and shows the results of their in vivo performance tests.
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Affiliation(s)
- Bruno Fonseca-Santos
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, 14800-903 Araraquara, São Paulo, Brazil.
| | - Marlus Chorilli
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, 14800-903 Araraquara, São Paulo, Brazil.
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31
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Hawkins PG, Lee JY, Mao Y, Li P, Green M, Worden FP, Swiecicki PL, Mierzwa ML, Spector ME, Schipper MJ, Eisbruch A. Sparing all salivary glands with IMRT for head and neck cancer: Longitudinal study of patient-reported xerostomia and head-and-neck quality of life. Radiother Oncol 2017; 126:68-74. [PMID: 28823405 DOI: 10.1016/j.radonc.2017.08.002] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 07/21/2017] [Accepted: 08/02/2017] [Indexed: 11/25/2022]
Abstract
BACKGROUND AND PURPOSE While parotid-sparing intensity modulated radiotherapy (IMRT) has demonstrated superiority to conventional RT in terms of observer-rated xerostomia, patient-reported outcome measures (PROMs) have only marginally improved. We investigated how sparing all salivary glands affects PROMs. MATERIALS AND METHODS Patients treated to the bilateral neck with all-gland-sparing IMRT answered xerostomia (XQ) and head-and-neck quality of life (HNQOL) questionnaires. Longitudinal regression was used to assess the relationship between questionnaire scores and mean bilateral parotid gland (bPG), contralateral submandibular gland (cSMG), and oral cavity (OC) doses. Marginal R2 and Akaike information criterion (AIC) were used for model evaluation. RESULTS 252 patients completed approximately 600 questionnaires. On univariate analysis, bPG, cSMG, and OC doses significantly correlated with XQ-summary, XQ-eating, and HNQOL-eating scores. On multivariate analysis, bPG and OC doses significantly correlated with XQ-summary, XQ-eating, and HNQOL-eating scores; and cSMG dose with HNQOL-summary. Combining doses to all three structures yielded the highest R2 for XQ-summary, XQ-rest, XQ-eating, and HNQOL-eating. In the 147 patients who received a mean cSMG dose ≤39Gy, there were no failures in contralateral level IB. CONCLUSIONS Reducing doses to all salivary glands maximizes PROMs. A cSMG dose constraint of ≤39Gy does not increase failure risk.
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Affiliation(s)
- Peter G Hawkins
- Department of Radiation Oncology, University of Michigan, Ann Arbor, United States
| | - Jae Y Lee
- Department of Radiation Oncology, University of Michigan, Ann Arbor, United States
| | - Yanping Mao
- Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Pin Li
- Department of Biostatistics, University of Michigan, Ann Arbor, United States
| | - Michael Green
- Department of Radiation Oncology, University of Michigan, Ann Arbor, United States
| | - Francis P Worden
- Department of Internal Medicine, Division of Medical Oncology, University of Michigan, Ann Arbor, United States
| | - Paul L Swiecicki
- Department of Internal Medicine, Division of Medical Oncology, University of Michigan, Ann Arbor, United States
| | - Michelle L Mierzwa
- Department of Radiation Oncology, University of Michigan, Ann Arbor, United States
| | - Matthew E Spector
- Department of Otolaryngology-Head and Neck Surgery, University of Michigan, Ann Arbor, United States
| | - Matthew J Schipper
- Department of Radiation Oncology, University of Michigan, Ann Arbor, United States; Department of Biostatistics, University of Michigan, Ann Arbor, United States
| | - Avraham Eisbruch
- Department of Radiation Oncology, University of Michigan, Ann Arbor, United States.
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Larsen KR, Johansen JD, Reibel J, Zachariae C, Rosing K, Pedersen AML. Oral symptoms and salivary findings in oral lichen planus, oral lichenoid lesions and stomatitis. BMC Oral Health 2017; 17:103. [PMID: 28662707 PMCID: PMC5492674 DOI: 10.1186/s12903-017-0393-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 06/16/2017] [Indexed: 02/08/2023] Open
Abstract
Background To examine if patients with oral lichen planus, oral lichenoid lesions and generalised stomatitis and concomitant contact allergy have more frequent and severe xerostomia, lower unstimulated and chewing-stimulated saliva and citric-acid-stimulated parotid saliva flow rates, and higher salivary concentration of total protein and sIgA than cases without contact allergy and healthy controls. Methods Forty-nine patients (42 women, aged 61.0 ± 10.3 years) and 29 healthy age- and gender-matched subjects underwent a standardised questionnaire on general and oral health, assessment of xerostomia, clinical examination, sialometry, mucosal biopsy and contact allergy testing. Results Nineteen patients had oral lichen planus, 19 patients had oral lichenoid lesions and 11 patients had generalised stomatitis. 38.8% had contact allergy. Xerostomia was significantly more common and severe in patients (46.9%) than in healthy controls, whereas the saliva flow rates did not differ. The patients had higher sIgA levels in unstimulated and chewing-stimulated saliva than the healthy controls. The total protein concentration in saliva was lower in the unstimulated saliva samples whereas it was higher in the chewing stimulated saliva samples from patients when compared to healthy controls. The differences were not significant and they were irrespective of the presence of contact allergy. Conclusion Xerostomia is prevalent in patients with oral lichen planus, lichenoid lesions and generalised stomatitis, but not associated with salivary gland hypofunction, numbers of systemic diseases or medications, contact allergy, age, or gender. Salivary sIgA levels were higher in patients than in healthy controls, but did not differ between patient groups. The total salivary protein concentration was lower in unstimulated saliva samples and higher in chewing-stimulated saliva samples in patients than in healthy controls, but did not differ between patient groups. Our findings do not aid in the discrimination between OLP and OLL and these conditions with or without contact allergic reactions.
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Affiliation(s)
- Kristine Roen Larsen
- Section for Oral Pathology and Oral Medicine, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, 20 Noerre Allé, DK-2200, Copenhagen N, Denmark.
| | - Jeanne Duus Johansen
- National Allergy Research Centre, Department of Dermatology and Allergy, Gentofte University Hospital, 28 Kildegaardsvej, DK-2900, Hellerup, Denmark
| | - Jesper Reibel
- Section for Oral Pathology and Oral Medicine, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, 20 Noerre Allé, DK-2200, Copenhagen N, Denmark
| | - Claus Zachariae
- Department of Dermatology and Allergy, Gentofte University Hospital, 28 Kildegaardsvej, DK-2900, Hellerup, Denmark
| | - Kasper Rosing
- Section for Community Dentistry, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, 20 Noerre Allé, DK-2200, Copenhagen N, Denmark
| | - Anne Marie Lynge Pedersen
- Section for Oral Pathology and Oral Medicine, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, 20 Noerre Allé, DK-2200, Copenhagen N, Denmark
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33
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Frenkel ES, Ribbeck K. Salivary mucins promote the coexistence of competing oral bacterial species. ISME JOURNAL 2017; 11:1286-1290. [PMID: 28117832 DOI: 10.1038/ismej.2016.200] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 11/25/2016] [Accepted: 12/01/2016] [Indexed: 01/11/2023]
Abstract
Mucus forms a major ecological niche for microbiota in various locations throughout the human body such as the gastrointestinal tract, respiratory tract and oral cavity. The primary structural components of mucus are mucin glycoproteins, which crosslink to form a complex polymer network that surrounds microbes. Although the mucin matrix could create constraints that impact inhabiting microbes, little is understood about how this key environmental factor affects interspecies interactions. In this study, we develop an experimental model using gel-forming human salivary mucins to understand the influence of mucin on the viability of two competing species of oral bacteria. We use this dual-species model to show that mucins promote the coexistence of the two competing bacteria and that mucins shift cells from the mixed-species biofilm into the planktonic form. Taken together, these findings indicate that the mucus environment could influence bacterial viability by promoting a less competitive mode of growth.
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Affiliation(s)
- Erica Shapiro Frenkel
- Biological Sciences in Dental Medicine, Harvard University, Cambridge, MA, USA.,Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Katharina Ribbeck
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
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Abstract
The proteome of whole saliva, in contrast to that of serum, is highly susceptible to a variety of physiological and biochemical processes. First, salivary protein secretion is under neurologic control, with protein output being dependent on the stimulus. Second, extensive salivary protein modifications occur in the oral environment, where a plethora of host- and bacteria-derived enzymes act on proteins emanating from the glandular ducts. Salivary protein biosynthesis starts with the transcription and translation of salivary protein genes in the glands, followed by post-translational processing involving protein glycosylation, phosphorylation, and proteolysis. This gives rise to salivary proteins occurring in families, consisting of structurally closely related family members. Once glandular secretions enter the non-sterile oral environment, proteins are subjected to additional and continuous protein modifications, leading to extensive proteolytic cleavage, partial deglycosylation, and protein-protein complex formation. All these protein modifications occur in a dynamic environment dictated by the continuous supply of newly synthesized proteins and removal by swallowing. Understanding the proteome of whole saliva in an environment of continuous turnover will be a prerequisite to gain insight into the physiological and pathological processes relevant to oral health, and be crucial for the identification of meaningful biomarkers for oral disease.
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Affiliation(s)
- E J Helmerhorst
- Boston University Goldman School of Dental Medicine, Department of Periodontology and Oral Biology, 700 Albany Street CABR W-201, Boston, MA 02118, USA.
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35
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Gandara B, Izutsu K, Truelove E, Ensign W, Sommers E. Age-related Salivary Flow Rate Changes in Controls and Patients with Oral Lichen Planus. J Dent Res 2016. [DOI: 10.1177/00220345850640091101] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Unstimulated whole saliva and stimulated whole, parotid, and labial minor gland saliva samples were collected from 25 patients with oral lichen planus and from 25 age- and sex-matched controls between the ages of 25 and 87 years. All subjects did not smoke or chew tobacco, had no serious illnesses, and were unmedicated. There were no significant differences in flow rates between the two groups. However, a significant age-related decrease in labial minor gland saliva flow rate was found in both the lichen planus group and the controls. Flow rates of unstimulated and stimulated whole saliva and stimulated parotid saliva were not related to age in either group.
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Affiliation(s)
| | - K.T. Izutsu
- Department of Oral Medicine, SC-63, Department of Oral Biology, SB-22, School of Dentistry, University of Washington, Seattle, Washington 98195
| | | | - W.Y. Ensign
- Department of Oral Biology, SB-22, School of Dentistry, University of Washington, Seattle, Washington 98195
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Abstract
Nature's demands on salivary glands are extensive and diverse and range from the reptilian need for a venomous drop to incapacitate its prey to the 100 quarts that ruminants require to digest a day's grazing. Other species depend on saliva not for survival, but for improving the quality of life, using the fluid for functions varying from grooming and cleansing to nest-building. Humans can manage without saliva; its loss is not life-threatening in any immediate sense, but it results in a variety of difficulties and miseries. Oral digestion per se is only of marginal importance in humans, but saliva is important in preparing food for mastication, for swallowing, and far normal taste perception. Without saliva, mealtimes are difficult, uncomfortable, and embarrassing. The complex mix of salivary constituents provides an effective set of systems for lubricating and protecting the soft and hard tissues. Protection of soft tissues is afforded against desiccation, penetration, ulceration, and potential carcinogens by mucin and anti-proteases. Saliva can encourage soft tissue repair by reducing clotting time and accelerating wound contraction. A major protective function results from the salivary role in maintenance of the ecological balance in the oral cavity via: (1) debridement/lavage; (2) aggregation and reduced adherence by both immunological and non-immunological means; and (3) direct antibacterial activity. Saliva also possesses antifungal and anti-viral systems. Saliva is effective in maintaining pH in the oral cavity, contributes to the regulation of plaque pH, and helps neutralize reflux acids in the esophagus. Salivary maintenance of tooth integrity is dependent on: (I) mechanical cleansing and carbohydrate clearance; (2) post-eruptive maturation of enamel; (3) regulation of the ionic environment to provide a remineralizing potential without spontaneous precipitation; and (4) pellicle deposition and limitation of acid diffusion. Saliva also plays a role in water balance, can serve in a limited way in excretion, and has possible hormonal function in the gastro-intestinal tract.
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Affiliation(s)
- I. D. Mandel
- School of Dental and Oral Surgery, Columbia University, 630 West 168th Street, New York, New York 10032
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Abstract
Modern technology has allowed us to understand better the functions of saliva and now provides a rationale for developing: (1) diagnostic reagents for monitoring oral and systemic health status and (2) replacement therapies for individuals with salivary dysfunctions. Several areas of dental research are directed at augmenting or enhancing both the quality and quantity of saliva for individuals with dry mouth. An “intrinsic” approach is being explored which utilizes medications such as pilocarpine and bromhexine to stimulate the salivary glands to produce more saliva. An “extrinsic” approach proposes to use topically applied artificial saliva. Studies in our laboratory have been directed toward developing artificial salivas which incorporate many of the protective features of “native” saliva. An ideal artificial saliva should be “long-lasting”, provide lubrication, inhibit colonization of microflora responsible for dental caries and gingivitis, and coat the oral soft tissues for protection against environmental insult and desiccation. Studies are currently under way to determine the structural requirements of salivary molecules responsible for these protective functions. Composite salivary molecules consisting of multiple biologically active or “functional domains” could then be designed and synthesized based upon primary sequence and conformational analyses, computer-assisted structural predictions, and in vitro testing. These supcrsalivary substances could then be used as saliva substitutes for targeting to selected oral surfaces to promote mineralization, hydration, and/or regulate microbial-mediated disease.
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Affiliation(s)
- M. J. Levine
- Departments of Oral Biology, 109 Foster Hall, State University of New York at Buffalo, Buffalo, New York 14214
| | - A. Aguirre
- Endodontics, School of Dental Medicine, 109 Foster Hall, State University of New York at Buffalo, Buffalo, New York 14214
| | - M. N. Hatton
- Oral Surgery, School of Dental Medicine, 109 Foster Hall, State University of New York at Buffalo, Buffalo, New York 14214
| | - L. A. Tabak
- Endodontics, School of Dental Medicine, 109 Foster Hall, State University of New York at Buffalo, Buffalo, New York 14214
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Hakami Z, Wakisaka S. Postnatal morphological and lectin histochemical observation of the submucosal glands of rat nasopharynx. Acta Histochem 2016; 118:665-673. [PMID: 27670789 DOI: 10.1016/j.acthis.2016.09.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 09/14/2016] [Accepted: 09/16/2016] [Indexed: 11/19/2022]
Abstract
The development of submucosal glands of rat nasopharynx was studied with respect to their morphological maturation and glycoprotein alterations during the postnatal period. This study examined the histological morphology with hematoxylin-eosin and the binding pattern of lectins, soybean agglutinin (SBA), Dolichos biflorus agglutinin (DBA), Vicia villosa agglutinin (VVA), Ulex europaeus agglutinin-I (UEA-I), peanut agglutinin (PNA), wheat germ agglutinin (WGA), and succinylated WGA (sucWGA) on frozen sections from newborn into adulthood. At birth, nasopharyngeal glands consisted of rudimentary secretory units which by postnatal day 3 (PN3) showed the characteristic features of salivary glands comprised of mixed mucous and serous cells. With maturation, serous cells increased in number and were arranged in clusters. Lectin reactivity at birth was detected at the acinar cell basal membranes for DBA, SBA, VVA, UEA-1 and PNA. At PN3, lectins labeled the apical cytoplasm and basolateral membranes of mucous cells and progressively with maturation, extended from the apical to basal portions of the cytoplasm with variable reactivity of VVA, PNA and sucWGA. Serous cells were labeled by UEA-1 starting from PN10 and also by PNA in adults. Ducts showed variable lectin reaction on the luminal membrane with strong reactivity of DBA and UEA-1 at PN21. Taken together, lectin histochemistry indicated the transitional occurrence of glycoproteins depending on the stage of maturation of the glands. Moreover, these results emphasize the difference in the morphology and lectin histochemistry between the nasopharyngeal and palatine glands.
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Affiliation(s)
- Zaki Hakami
- Department of Preventive Dental Sciences, Division of Orthodontics, College of Dentistry, Jazan University, Jazan, Saudi Arabia.
| | - Satoshi Wakisaka
- Department of Oral Anatomy and Developmental Biology, Osaka University Graduate School of Dentistry, Osaka, Japan
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Navarrete BA, Palacios PJR, Aguilar-Salvatierra A, Guardia J, Gómez-Moreno G. Effect of inhaled corticosteroids on salival composition: a cross-sectional study in patients with bronchial asthma. Clin Drug Investig 2016; 35:569-74. [PMID: 26271244 DOI: 10.1007/s40261-015-0313-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND To date, no evidence exists in the literature as to the effects of inhaled corticosteroids (ICs) on salivary composition in patients with bronchial asthma. OBJECTIVE The aim of this study was to assess the effect of ICs on salival composition. METHODS Adult patients attending an outpatient respiratory clinic who were classified into two groups (controls and patients with bronchial asthma receiving ICs), were recruited in this cross-sectional study. For each participant, data of clinical records, baseline history of asthma, and regular IC dose were recorded. A sample of stimulated saliva was collected and processed for investigation of mucin 5B (MUC5B), lipoxygenase (LPO), total antioxidant capacity, and 8-hydroxydeoxyguanosine (8-OHdG) levels. RESULTS Overall, 103 patients (49 controls and 54 patients receiving regular treatment with ICs) were recruited. No differences in comorbidities or smoking habits were observed. Patients treated with high-doses of ICs showed lower levels of salival MUC5B compared with those treated with medium IC doses or those not treated with ICs (1.60 vs. 2.20 vs. 2.53 ng/mL; p = 0.042). CONCLUSION In patients with asthma, treatment with high-doses of ICs is associated with reduced levels of salivary MUC5B. This effect can explain some of the effects of ICs on oral health.
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Biopolymeric Mucin and Synthetic Polymer Analogs: Their Structure, Function and Role in Biomedical Applications. Polymers (Basel) 2016; 8:polym8030071. [PMID: 30979166 PMCID: PMC6432556 DOI: 10.3390/polym8030071] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 02/23/2016] [Accepted: 02/24/2016] [Indexed: 12/17/2022] Open
Abstract
Mucin networks are viscoelastic fibrillar aggregates formed through the complex self-association of biopolymeric glycoprotein chains. The networks form a lubricious, hydrated protective shield along epithelial regions within the human body. The critical role played by mucin networks in impacting the transport properties of biofunctional molecules (e.g., biogenic molecules, probes, nanoparticles), and its effect on bioavailability are well described in the literature. An alternate perspective is provided in this paper, presenting mucin’s complex network structure, and its interdependent functional characteristics in human physiology. We highlight the recent advances that were achieved through the use of mucin in diverse areas of bioengineering applications (e.g., drug delivery, biomedical devices and tissue engineering). Mucin network formation is a highly complex process, driven by wide variety of molecular interactions, and the network possess structural and chemical variations, posing a great challenge to understand mucin’s bulk behavior. Through this review, the prospective potential of polymer based analogs to serve as mucin mimic is suggested. These analog systems, apart from functioning as an artificial model, reducing the current dependency on animal models, can aid in furthering our fundamental understanding of such complex structures.
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Çelebioğlu HY, Gudjónsdóttir M, Chronakis IS, Lee S. Investigation of the interaction between mucins and β-lactoglobulin under tribological stress. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.09.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Dave LA, Hayes M, Montoya CA, Rutherfurd SM, Moughan PJ. Human gut endogenous proteins as a potential source of angiotensin-I-converting enzyme (ACE-I)-, renin inhibitory and antioxidant peptides. Peptides 2016; 76:30-44. [PMID: 26617077 DOI: 10.1016/j.peptides.2015.11.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 10/07/2015] [Accepted: 11/19/2015] [Indexed: 01/17/2023]
Abstract
It is well known that endogenous bioactive proteins and peptides play a substantial role in the body's first line of immunological defence, immune-regulation and normal body functioning. Further, the peptides derived from the luminal digestion of proteins are also important for body function. For example, within the peptide database BIOPEP (http://www.uwm.edu.pl/biochemia/index.php/en/biopep) 12 endogenous antimicrobial and 64 angiotensin-I-converting enzyme (ACE-I) inhibitory peptides derived from human milk and plasma proteins are listed. The antimicrobial peptide database (http://aps.unmc.edu/AP/main.php) lists over 111 human host-defence peptides. Several endogenous proteins are secreted in the gut and are subject to the same gastrointestinal digestion processes as food proteins derived from the diet. The human gut endogenous proteins (GEP) include mucins, serum albumin, digestive enzymes, hormones, and proteins from sloughed off epithelial cells and gut microbiota, and numerous other secreted proteins. To date, much work has been carried out regarding the health altering effects of food-derived bioactive peptides but little attention has been paid to the possibility that GEP may also be a source of bioactive peptides. In this review, we discuss the potential of GEP to constitute a gut cryptome from which bioactive peptides such as ACE-I inhibitory, renin inhibitory and antioxidant peptides may be derived.
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Affiliation(s)
- Lakshmi A Dave
- Massey Institute of Food Science and Technology, Massey University, Palmerston North, New Zealand; Teagasc, The Irish Agricultural and Food Development Authority, Food BioSciences Department, Ashtown, D 15 Dublin, Ireland
| | - Maria Hayes
- Teagasc, The Irish Agricultural and Food Development Authority, Food BioSciences Department, Ashtown, D 15 Dublin, Ireland
| | - Carlos A Montoya
- Massey Institute of Food Science and Technology, Massey University, Palmerston North, New Zealand
| | - Shane M Rutherfurd
- Massey Institute of Food Science and Technology, Massey University, Palmerston North, New Zealand.
| | - Paul J Moughan
- Massey Institute of Food Science and Technology, Massey University, Palmerston North, New Zealand
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Arranz E, Corredig M, Guri A. Designing food delivery systems: challenges related to the in vitro methods employed to determine the fate of bioactives in the gut. Food Funct 2016; 7:3319-36. [DOI: 10.1039/c6fo00230g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This review discussesin vitroavailable approaches to study delivery and uptake of bioactive compounds and the associated challenges.
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Affiliation(s)
- Elena Arranz
- Food Science Department
- University of Guelph
- Guelph
- Canada
| | | | - Anilda Guri
- Food Science Department
- University of Guelph
- Guelph
- Canada
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44
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Ployon S, Belloir C, Bonnotte A, Lherminier J, Canon F, Morzel M. The membrane-associated MUC1 improves adhesion of salivary MUC5B on buccal cells. Application to development of an in vitro cellular model of oral epithelium. Arch Oral Biol 2016; 61:149-55. [DOI: 10.1016/j.archoralbio.2015.11.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 11/02/2015] [Accepted: 11/03/2015] [Indexed: 12/19/2022]
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45
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Frenkel ES, Ribbeck K. Salivary mucins in host defense and disease prevention. J Oral Microbiol 2015; 7:29759. [PMID: 26701274 PMCID: PMC4689954 DOI: 10.3402/jom.v7.29759] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/16/2015] [Accepted: 11/17/2015] [Indexed: 12/15/2022] Open
Abstract
Mucus forms a protective coating on wet epithelial surfaces throughout the body that houses the microbiota and plays a key role in host defense. Mucins, the primary structural components of mucus that creates its viscoelastic properties, are critical components of the gel layer that protect against invading pathogens. Altered mucin production has been implicated in diseases such as ulcerative colitis, asthma, and cystic fibrosis, which highlights the importance of mucins in maintaining homeostasis. Different types of mucins exist throughout the body in various locations such as the gastrointestinal tract, lungs, and female genital tract, but this review will focus on mucins in the oral cavity. Salivary mucin structure, localization within the oral cavity, and defense mechanisms will be discussed. These concepts will then be applied to present what is known about the protective function of mucins in oral diseases such as HIV/AIDS, oral candidiasis, and dental caries.
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Affiliation(s)
- Erica Shapiro Frenkel
- Biological Sciences in Dental Medicine, Harvard University, Cambridge, MA, USA.,Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Katharina Ribbeck
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA;
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Is Pilocarpine Effective in Preventing Radiation-Induced Xerostomia? A Systematic Review and Meta-analysis. Int J Radiat Oncol Biol Phys 2015; 94:503-11. [PMID: 26867879 DOI: 10.1016/j.ijrobp.2015.11.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 09/29/2015] [Accepted: 11/04/2015] [Indexed: 01/03/2023]
Abstract
PURPOSE To evaluate the efficacy of concomitant administration of pilocarpine on radiation-induced xerostomia in patients with head and neck cancers. METHODS AND MATERIALS The PubMed, Web of Science, Cochrane Library, and ClinicalTrials were searched to identify randomized, controlled trials studying the effect of concomitant administration of pilocarpine for radiation-induced xerostomia. Included trials were systematically reviewed, and quantifiable outcomes were pooled for meta-analysis. Outcomes of interest included salivary flow, clinician-rated xerostomia grade, patient-reported xerostomia scoring, quality of life, and adverse effects. RESULTS Six prospective, randomized, controlled trials in 8 articles were included in this systematic review. The total number of patients was 369 in the pilocarpine group and 367 in the control group. Concomitant administration of pilocarpine during radiation could increase the unstimulated salivary flow rate in a period of 3 to 6 months after treatment, and also reduce the clinician-rated xerostomia grade. Patient-reported xerostomia was not significantly impacted by pilocarpine in the initial 3 months but was superior at 6 months. No significant difference of stimulated salivary flow rate could be confirmed between the 2 arms. Adverse effects of pilocarpine were mild and tolerable. CONCLUSIONS The concomitant administration of pilocarpine during radiation increases unstimulated salivary flow rate and reduces clinician-rated xerostomia grade after radiation. It also relieves patients' xerostomia at 6 months and possibly at 12 months. However, pilocarpine has no effect on stimulated salivary flow rate.
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Authimoolam SP, Lakes AL, Puleo DA, Dziubla TD. Layer-by-Layers of Polymeric Micelles as a Biomimetic Drug-Releasing Network. Macromol Biosci 2015; 16:242-54. [PMID: 26418812 DOI: 10.1002/mabi.201500310] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 09/11/2015] [Indexed: 11/08/2022]
Abstract
Mucin networks are lubricous biofunctional coats formed through the continuous deposition of mucin glycoproteins. Previously, we demonstrated the synthesis of a mucin mimic using biotinylated-filomicelles crosslinked via streptavidin using a layer-by-layer approach. These networks recreate the fibrous nature of mucin and can serve as a drug-releasing network. In this work, the ability to vary the network properties by blending filomicelles with spherical micelles is demonstrated. In addition, the deposition of a dense polymer coating on the mucin network was shown to act as a barrier to control diffusion and improved the structural stability under simulated oral chemical conditions. These biomimetic coatings can be utilized as a delivery system, providing a tunable drug release for oral applications.
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Affiliation(s)
- Sundar P Authimoolam
- Department of Chemical and Materials Engineering, College of Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington, Kentucky, 40506, USA
| | - Andrew L Lakes
- Department of Chemical and Materials Engineering, College of Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington, Kentucky, 40506, USA
| | - David A Puleo
- Department of Biomedical Engineering, College of Engineering, University of Kentucky, 522 Robotics Building, Lexington, Kentucky, 40506, USA
| | - Thomas D Dziubla
- Department of Chemical and Materials Engineering, College of Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington, Kentucky, 40506, USA.
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48
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Guri A, Li Y, Corredig M. Interfacial dilational properties of tea polyphenols and milk proteins with gut epithelia and the role of mucus in nutrient adsorption. Food Funct 2015; 6:3642-51. [PMID: 26328543 DOI: 10.1039/c5fo00654f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
By interacting with nutrients, the mucus layer covering the intestinal epithelium may mediate absorption. This study aimed to determine possible interactions between epigallocatechin-3-gallate (EGCG), skim milk proteins or their complexes with human intestinal mucin films. The films were extracted from postconfluent monolayers of HT29-MTX, a human intestinal cell line, and a model system was created using drop shape tensiometry. The EGCG uptake tested in vitro on postconfluent Caco-2 cells or co-cultures of Caco-2/HT29-MTX (mucus producing) showed recovery of bioavailable EGCG only for Caco-2 cell monolayers, suggesting an effect of mucus on absorption. Interfacial dilational rheology was employed to characterize the properties of the interface mixed with mucus dispersion. Adsorption of polyphenols greatly enhanced the viscoelastic modulus of the mucus film, showing the presence of interactions between the nutrient molecules and mucus films. On the other hand, in situ digestion of milk proteins using trypsin showed higher surface activities as a result of protein unfolding and competitive adsorption of the hydrolyzed products. There was an increase of viscoelastic modulus over the drop ageing time for the mixed interfaces, indicating the formation of a stiffer interfacial network. These results bring new insights into the role of the mucus layer in nutrient absorption and the interactions of mucus and dairy products.
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Affiliation(s)
- Anilda Guri
- Food Science Department, University of Guelph, Ontario, N1G2W1, Canada
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Aliko A, Wolff A, Dawes C, Aframian D, Proctor G, Ekström J, Narayana N, Villa A, Sia YW, Joshi RK, McGowan R, Beier Jensen S, Kerr AR, Lynge Pedersen AM, Vissink A. World Workshop on Oral Medicine VI: clinical implications of medication-induced salivary gland dysfunction. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 120:185-206. [DOI: 10.1016/j.oooo.2014.10.027] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 10/12/2014] [Indexed: 10/23/2022]
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50
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Zaieni SH, Derakhshan Z, Sariri R. Alternations of salivary antioxidant enzymes in systemic lupus erythematosus. Lupus 2015; 24:1400-5. [PMID: 26113360 DOI: 10.1177/0961203315593170] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 06/02/2015] [Indexed: 11/16/2022]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease with chronic systemic inflammation. Oxidative stress may play a role in the pathogenesis of SLE. An increase in free radicals or an impaired antioxidant defense system in SLE causes oxidative stress. Therefore, oxidative damage plays an important role in the pathogenesis of SLE. Variations in antioxidant activity have been previously studied in serum of patients with this disease. However, salivary factors have not been evaluated. Considering that saliva, the noninvasive biological fluid, could be a reflection of the state of health, the purpose of this study was evaluation of peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) activity in the saliva of patients with SLE. During the course of the practical part of the project, 30 patients with SLE and 30 healthy controls were selected to donate their saliva samples. After centrifugation of un-stimulated saliva, biological activity of POD, CAT and SOD were evaluated on their appropriate substrates using spectrophotometric methods and the results were statistically analyzed. The results showed that activities of antioxidant enzymes SOD and CAT were significantly reduced in saliva of SLE patients as compared to controls. The results suggest that antioxidant status was impaired in the saliva of SLE patients, and antioxidant status of saliva could be one of the non-invasive markers for SLE.
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Affiliation(s)
- S H Zaieni
- Department of Internal Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Z Derakhshan
- Department of Biology, University of Guilan, Rasht, Iran
| | - R Sariri
- Department of Biology, University of Guilan, Rasht, Iran
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