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Gheisari M, Nosrati S, Zare S, Dara M, Zolghadri S, Razeghian-Jahromi I. The impact of high nicotine concentrations on the viability and cardiac differentiation of mesenchymal stromal cells: a barrier to regenerative therapy for smokers. Front Cell Dev Biol 2024; 12:1323691. [PMID: 38638529 PMCID: PMC11024539 DOI: 10.3389/fcell.2024.1323691] [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: 10/18/2023] [Accepted: 03/20/2024] [Indexed: 04/20/2024] Open
Abstract
Background: Current treatment methods are not successful in restoring the lost cardiomyocytes after injury. Stem cell-based strategies have attracted much attention in this regard. Smoking, as a strong cardiovascular risk factor, not only affects the cardiac cells adversely but also deteriorates the function of stem cells. Since mesenchymal stem cells (MSCs) are one of the popular candidates in cardiovascular disease (CVD) clinical trials, we investigated the impact of nicotine on the regenerative properties (viability and cardiac differentiation) of these cells. Methods: MSCs were isolated from rat bone marrow and characterized based on morphology, differentiation capability, and the expression of specific mesenchymal markers. The MTT assay was used to assess the viability of MSCs after being exposed to different concentrations of nicotine. Based on MTT findings and according to the concentration of nicotine in smokers' blood, the growth curve and population doubling time were investigated for eight consecutive days. Cells were treated with 5-azacytidine (an inducer of cardiac differentiation), and then the expressions of cardiac-specific markers were calculated by qPCR. Results: MSCs were spindle-shaped, capable of differentiating into adipocyte and osteocyte, and expressed CD73 and CD90. The viability of MSCs was reduced upon exposure to nicotine in a concentration- and time-dependent manner. The growth curve showed that nicotine reduced the proliferation of MSCs, and treated cells needed more time to double. In addition, the expressions of GATA4 and troponin were downregulated in nicotine-treated cells on day 3. However, these two cardiac markers were overexpressed on day 7. Conclusion: Nicotine decreased normal growth and reduced the expression of cardiac markers in MSCs. This aspect is of eminent importance to smokers with cardiovascular disease who are candidates for stem cell therapy.
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Affiliation(s)
- Maryam Gheisari
- Department of Biochemistry, Shiraz Branch, Islamic Azad University, Shiraz, Iran
| | - Shadi Nosrati
- Department of Biochemistry, Shiraz Branch, Islamic Azad University, Shiraz, Iran
| | - Shahrokh Zare
- Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mahintaj Dara
- Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Samaneh Zolghadri
- Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
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2
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Insua A, Galindo-Moreno P, Miron RJ, Wang HL, Monje A. Emerging factors affecting peri-implant bone metabolism. Periodontol 2000 2024; 94:27-78. [PMID: 37904311 DOI: 10.1111/prd.12532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/05/2023] [Accepted: 09/10/2023] [Indexed: 11/01/2023]
Abstract
Implant dentistry has evolved to the point that standard implant osseointegration is predictable. This is attributed in part to the advancements in material sciences that have led toward improvements in implant surface technology and characteristics. Nonetheless, there remain several cases where implant therapy fails (specifically at early time points), most commonly attributed to factors affecting bone metabolism. Among these patients, smokers are known to have impaired bone metabolism and thus be subject to higher risks of early implant failure and/or late complications related to the stability of the peri-implant bone and mucosal tissues. Notably, however, emerging data have unveiled other critical factors affecting osseointegration, namely, those related to the metabolism of bone tissues. The aim of this review is to shed light on the effects of implant-related factors, like implant surface or titanium particle release; surgical-related factors, like osseodensification or implanted biomaterials; various drugs, like selective serotonin reuptake inhibitors, proton pump inhibitors, anti-hypertensives, nonsteroidal anti-inflammatory medication, and statins, and host-related factors, like smoking, diet, and metabolic syndrome on bone metabolism, and aseptic peri-implant bone loss. Despite the infectious nature of peri-implant biological complications, these factors must be surveyed for the effective prevention and management of peri-implantitis.
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Affiliation(s)
- Angel Insua
- Department of Periodontology and Oral Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Pablo Galindo-Moreno
- Department of Periodontology and Oral Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Department of Oral Surgery and Implant Dentistry, University of Granada, Granada, Spain
| | - Richard J Miron
- Department of Periodontology, University of Bern, Bern, Switzerland
| | - Hom-Lay Wang
- Department of Periodontology and Oral Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Alberto Monje
- Department of Periodontology and Oral Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Department of Periodontology, University of Bern, Bern, Switzerland
- Department of Periodontology, Universitat Internacional de Catalunya, Barcelona, Spain
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3
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Harsono AD, Dilogo IH, Prasetyono TOH, Prasetyo M, Werdhani RA, Jusman SWA, Siregar NC, Soedjana H. Clinical evaluation of intralesional umbilical cord-derived mesenchymal stem cells, conditioned medium and triamcinolone acetonide injection for keloid treatment: A pilot study. Int Wound J 2023; 21:e14460. [PMID: 37885365 PMCID: PMC10828519 DOI: 10.1111/iwj.14460] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/09/2023] [Accepted: 10/12/2023] [Indexed: 10/28/2023] Open
Abstract
Topical keloid therapy is performed with triamcinolone acetonide (TA) intralesional injection. However, the recurrence rate is high with various side effects. Mesenchymal stem cells (MSCs) have high proliferative abilities and reduce the activity and proliferation of fibroblast cells in keloids. To overcome the costs and limitations, conditioned medium (CM) is used. This study aims to evaluate feasibility of intralesional injection of umbilical cord MSC (UC-MSC) and conditioned medium (UC-CM) compared to TA for keloid therapy. Twenty-four patients with keloids who met the inclusion criteria were included, randomized into three treatment groups and then got assessed for the sociodemographic data, keloid volume, histopathology (type 1:3 collagen ratio), interleukin-10 (IL-10) levels and Patient and Observer Scar Assessment Scale (POSAS) score during visits. Largest volume regression occurred in the UC-MSC group, followed by UC-CM and then the TA group (UC-MSC: 45.32% ± 2.61%; UC-CM: 43.61% ± 3.67%; TA: 28.34% ± 3.81%; p = 0.003). Similar pattern was also observed in increase in IL-10 levels, the decrease in POSAS scores and the reduction of type 1:3 collagen ratio. Hence, UC-MSC and UC-CM are promisingly more effective than TA for keloid therapy, showcasing their superiority in reducing keloid volume, symptoms and type 1:3 collagen ratio, as well as increasing the levels of IL-10.
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Affiliation(s)
- Anastasia Dessy Harsono
- Department of Plastic and Reconstructive SurgeryGatot Subroto Army HospitalJakartaIndonesia
- Doctoral Program in Medical Sciences Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
| | - Ismail Hadisoebroto Dilogo
- ICTEC (Indonesian Clinical Training and Education Center), Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
- Medical Technology Cluster, Indonesian Medical Education and Research Institute, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
- Stem Cell Medical Technology Integrated Service Unit, Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
- Stem Cell and Tissue Engineering Research Center, Indonesian Medical Education and Research Institute, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
- Department of Orthopaedic and Traumatology, Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
| | - Theddeus Octavianus Hari Prasetyono
- ICTEC (Indonesian Clinical Training and Education Center), Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
- Medical Technology Cluster, Indonesian Medical Education and Research Institute, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
| | - Marcel Prasetyo
- Department of Radiology, Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
| | - Retno Asti Werdhani
- Department of Community Medicine, Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
| | - Sri Widia A. Jusman
- Department of Biochemistry and Molecular Biology, Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
| | - Nuryati Chairani Siregar
- Department of Anatomical Pathology, Cipto Mangunkusumo Hospital, Faculty of MedicineUniversitas IndonesiaJakartaIndonesia
| | - Hardisiswo Soedjana
- Department of Plastic and Reconstructive Surgery, Hasan Sadikin Hospital, Faculty of MedicineUniversitas PadjadjaranBandungIndonesia
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4
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Zhou M, Graves DT. Impact of the host response and osteoblast lineage cells on periodontal disease. Front Immunol 2022; 13:998244. [PMID: 36304447 PMCID: PMC9592920 DOI: 10.3389/fimmu.2022.998244] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/12/2022] [Indexed: 12/05/2022] Open
Abstract
Periodontitis involves the loss of connective tissue attachment and alveolar bone. Single cell RNA-seq experiments have provided new insight into how resident cells and infiltrating immune cells function in response to bacterial challenge in periodontal tissues. Periodontal disease is induced by a combined innate and adaptive immune response to bacterial dysbiosis that is initiated by resident cells including epithelial cells and fibroblasts, which recruit immune cells. Chemokines and cytokines stimulate recruitment of osteoclast precursors and osteoclastogenesis in response to TNF, IL-1β, IL-6, IL-17, RANKL and other factors. Inflammation also suppresses coupled bone formation to limit repair of osteolytic lesions. Bone lining cells, osteocytes and periodontal ligament cells play a key role in both processes. The periodontal ligament contains cells that exhibit similarities to tendon cells, osteoblast-lineage cells and mesenchymal stem cells. Bone lining cells consisting of mesenchymal stem cells, osteoprogenitors and osteoblasts are influenced by osteocytes and stimulate formation of osteoclast precursors through MCSF and RANKL, which directly induce osteoclastogenesis. Following bone resorption, factors are released from resorbed bone matrix and by osteoclasts and osteal macrophages that recruit osteoblast precursors to the resorbed bone surface. Osteoblast differentiation and coupled bone formation are regulated by multiple signaling pathways including Wnt, Notch, FGF, IGF-1, BMP, and Hedgehog pathways. Diabetes, cigarette smoking and aging enhance the pathologic processes to increase bone resorption and inhibit coupled bone formation to accelerate bone loss. Other bone pathologies such as rheumatoid arthritis, post-menopausal osteoporosis and bone unloading/disuse also affect osteoblast lineage cells and participate in formation of osteolytic lesions by promoting bone resorption and inhibiting coupled bone formation. Thus, periodontitis involves the activation of an inflammatory response that involves a large number of cells to stimulate bone resorption and limit osseous repair processes.
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Affiliation(s)
- Mi Zhou
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Dana T. Graves
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
- *Correspondence: Dana T. Graves,
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Gousopoulou E, Bakopoulou A, Apatzidou DA, Leyhausen G, Volk J, Staufenbiel I, Geurtsen W, Adam K. Evaluation of stemness properties of cells derived from granulation tissue of peri-implantitis lesions. Clin Exp Dent Res 2021; 7:739-753. [PMID: 33605088 PMCID: PMC8543464 DOI: 10.1002/cre2.406] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/31/2020] [Accepted: 01/29/2021] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES Peri-implantitis (PI) is an inflammatory disease associated with peri-implant bone loss and impaired healing potential. There is limited evidence about the presence of mesenchymal stromal cells (MSCs) and their regenerative properties within the granulation tissue (GT) of infrabony peri-implantitis defects. The aim of the present study was to characterize the cells derived from the GT of infrabony PI lesions (peri-implantitis derived mesenchymal stromal cells-PIMSCs). MATERIAL AND METHODS PIMSC cultures were established from GT harvested from PI lesions with a pocket probing depth ≥6 mm, bleeding on probing/suppuration, and radiographic evidence of an infrabony component from four systemically healthy individuals. Cultures were analyzed for embryonic (SSEA4, NANOG, SOX2, OCT4A), mesenchymal (CD90, CD73, CD105, CD146, STRO1) and hematopoietic (CD34, CD45) stem cell markers using flow cytometry. PIMSC cultures were induced for neurogenic, angiogenic and osteogenic differentiation by respective media. Cultures were analyzed for morphological changes and mineralization potential (Alizarin Red S method). Gene expression of neurogenic (NEFL, NCAM1, TUBB3, ENO2), angiogenic (VEGFR1, VEGFR2, PECAM1) and osteogenic (ALPL, BGLAP, BMP2, RUNX2) markers was determined by quantitative RT-PCR. RESULTS PIMSC cultures demonstrated high expression of embryonic and mesenchymal stem cell markers with inter-individual variability. After exposure to neurogenic, angiogenic and osteogenic conditions, PIMSCs showed pronounced tri-lineage differentiation potential, as evidenced by their morphology and expression of respective markers. High mineralization potential was observed. CONCLUSIONS This study provides evidence that MSC-like populations reside within the GT of PI lesions and exhibit a multilineage differentiation potential. Further studies are needed to specify the biological role of these cells in the healing processes of inflamed PI tissues and to provide indications for their potential use in regenerative therapies.
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Affiliation(s)
- Evangelia Gousopoulou
- Department of Preventive Dentistry, Periodontology & Implant Biology, School of Dentistry, Faculty of Health SciencesAristotle University of Thessaloniki (AUTh)ThessalonikiGreece
- Department of Conservative Dentistry, Periodontology & Preventive Dentistry, School of DentistryHannover Medical School (MHH)HannoverGermany
| | - Athina Bakopoulou
- Department of Conservative Dentistry, Periodontology & Preventive Dentistry, School of DentistryHannover Medical School (MHH)HannoverGermany
- Department of Prosthodontics, School of Dentistry, Faculty of Health SciencesAristotle University of Thessaloniki (AUTh)ThessalonikiGreece
| | - Danae Anastasia Apatzidou
- Department of Preventive Dentistry, Periodontology & Implant Biology, School of Dentistry, Faculty of Health SciencesAristotle University of Thessaloniki (AUTh)ThessalonikiGreece
| | - Gabriele Leyhausen
- Department of Conservative Dentistry, Periodontology & Preventive Dentistry, School of DentistryHannover Medical School (MHH)HannoverGermany
| | - Joachim Volk
- Department of Conservative Dentistry, Periodontology & Preventive Dentistry, School of DentistryHannover Medical School (MHH)HannoverGermany
| | - Ingmar Staufenbiel
- Department of Conservative Dentistry, Periodontology & Preventive Dentistry, School of DentistryHannover Medical School (MHH)HannoverGermany
| | - Werner Geurtsen
- Department of Conservative Dentistry, Periodontology & Preventive Dentistry, School of DentistryHannover Medical School (MHH)HannoverGermany
| | - Knut Adam
- Department of Conservative Dentistry, Periodontology & Preventive Dentistry, School of DentistryHannover Medical School (MHH)HannoverGermany
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6
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Nguyen B, Alpagot T, Oh H, Ojcius D, Xiao N. Comparison of the effect of cigarette smoke on mesenchymal stem cells and dental stem cells. Am J Physiol Cell Physiol 2021; 320:C175-C181. [PMID: 33175571 DOI: 10.1152/ajpcell.00217.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The persistent prevalence of cigarette smoking continues to contribute to preventable disease and death in the United States. Although much is known about the deleterious systemic effects of cigarette smoke and nicotine, some clinically relevant areas, such as the impact of cigarette smoke and nicotine on stem cells and the subsequent implications in regenerative medicine, still remain unclear. This review focuses on recent studies on the effect of cigarette smoke and one of its deleterious components, nicotine, on mesenchymal stem cells, with an emphasis on dental stem cells.
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Affiliation(s)
- Brandon Nguyen
- Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California
| | - Tamer Alpagot
- Department of Periodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California
| | - Heesoo Oh
- Department of Orthodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California
| | - David Ojcius
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California
| | - Nan Xiao
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California
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7
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The Effects of Smoking Cigarettes on Immediate Dental Implant Stability—A Prospective Case Series Study. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app11010027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background: Smoking tobacco significantly affects the biology of periodontal tissues and contributes to the increased risk of peri-implant diseases. The aim of the study was to investigate whether smoking cigarettes affects the primary and secondary stability of maxillary dental implants, inserted into fresh sockets immediately after extraction. Methods: The study was conducted on 164 patients between the ages of 27–71 years old. 67 individuals smoked more than 20 cigarettes daily and 97 were non-smokers. 190 immediate implants were inserted in the maxilla. Immediate implantations were performed with simultaneous augmentation of the socket with xenogenic bone grafting material. In the posterior region, implants were inserted into the palatal alveolus. The stability of the implants was measured using Insertion Torque Value (ITV) and two types of devices: Periotest (PT) and Osstell (ISQ). Marginal bone loss was evaluated on cone beam computed tomography scans. Results: In an aesthetic area, the PT values at 6 months post-implantation were higher for smokers than non-smokers (p < 0.05), respectively. The ISQ values were significantly lower in smokers compared to non-smokers at 6 months post-implantation (p = 0.0226), respectively. In the posterior region PT values were higher in smokers both on the day of implantation (p = 0.0179), 6 months after surgery (p = 0.0003) as well as 24 months after surgery (p < 0.0001), as compared to non-smokers, respectively. Smokers revealed lower ISQ values than non-smokers (p = 0.0047) on the day of implantation, as well as 6 months after implantation (p = 0.0002), respectively. There were no significant differences in marginal bone loss after 18 months of loading between smokers and non-smokers in the aesthetic, as well as posterior regions (p > 0.05). ITV measurements were lower in smokers than non-smokers in the aesthetic (16.3 vs. 17.5 Ncm) and posterior area (16.8 vs. 17.9 Ncm). Conclusions: This study indicate that smoking cigarettes has a negative effect on the stability of immediate implants in the maxilla. Primary stability of immediate implants may be lower in the posterior area of the maxilla in smokers when compared to non-smokers, which may eliminate smokers from immediate implants in this region. Secondary stability of immediate implants may be lower in both the aesthetic and posterior areas in smokers compared to non-smokers, which may encourage the postponement of final crowns delivery at 6 months post op and the extension of the occlusaly temporary crowns use in some smoker cases.
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Micu IC, Bolboacă SD, Caracostea GV, Gligor D, Ciurea A, Iozon S, Soancă A, Mureșan D, Roman A. Self-reported and clinical periodontal conditions in a group of Eastern European postpartum women. PLoS One 2020; 15:e0237510. [PMID: 32810155 PMCID: PMC7433868 DOI: 10.1371/journal.pone.0237510] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 07/28/2020] [Indexed: 12/02/2022] Open
Abstract
Periodontitis is a highly prevalent condition leading to a continuous destruction of tooth-supporting tissues. It increases the risk for various systemic diseases and adverse pregnancy outcomes. Therefore, screening for periodontitis is important. Screening measures can range from self-reported symptoms to clinical full-mouth periodontal examination. The hypothesis of our study was that self-reported parameters and clinical definition perform equally well in identifying periodontitis patients. The aim of this study was to develop, validate its internal consistency, and evaluate a self-reported instrument against periodontal clinical evaluation for diagnosis of periodontitis in a group of postpartum women, as well as to describe their periodontal status and the risk factors associated with periodontal disease. A cross-sectional study on postpartum women was conducted in a tertiary university hospital, from April 2018 to March 2019. Sociodemographic and behavioral data, periodontal clinical parameters, and self-reported periodontal perception were collected. A 16-item questionnaire was developed to obtain information about perceived periodontal alterations and oral hygiene habits. The utility of the questionnaire was tested against a periodontal diagnosis based on a full-mouth periodontal examination. The questionnaire was applied in 215 postpartum women aged 29.16±5.54 years (mean age (y) ± standard deviation) having the following periodontal status: 16 individuals without periodontal disease (7.44%), 32 individuals with gingivitis (14.88%), 19 individuals with mild periodontitis (8.84%), 132 individuals with moderate periodontitis (61.39%), and 16 individuals with severe periodontitis (7.44%). A significant association was observed between oral hygiene score, smoking status, and periodontal conditions (p<0.05). A significant association between the self-reported items related to “gum swelling”, “halitosis”, “previous periodontal diagnosis” and “previous periodontal treatment” with clinical periodontitis have been identified (p<0.05). Using self-reported questionnaires for detection of periodontal disease was ineffective in our studied population, since self-reported parameters and clinical definition do not appear to perform equally in identifying periodontitis cases. Clinical periodontal examination remains the gold standard for screening. Periodontitis was frequent in our group and the severity was significantly associated with the oral hygiene score and smoking. These results underline the necessity for periodontal clinical examination during pregnancy.
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Affiliation(s)
- Iulia C. Micu
- Department of Periodontology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Sorana D. Bolboacă
- Department of Medical Informatics and Biostatistics, “Iuliu Hațieganu” University of Medicine and Pharmacy Cluj-Napoca, Romania
- * E-mail: (SDB); (GVC)
| | - Gabriela V. Caracostea
- Department of Obstetrics and Gynecology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Emergency County Clinical Hospital, Cluj-Napoca, Romania
- * E-mail: (SDB); (GVC)
| | - Diana Gligor
- Department of Obstetrics and Gynecology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Emergency County Clinical Hospital, Cluj-Napoca, Romania
| | - Andreea Ciurea
- Department of Periodontology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Sofia Iozon
- Department of Periodontology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Emergency County Clinical Hospital, Cluj-Napoca, Romania
| | - Andrada Soancă
- Department of Periodontology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Emergency County Clinical Hospital, Cluj-Napoca, Romania
| | - Daniel Mureșan
- Department of Obstetrics and Gynecology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Emergency County Clinical Hospital, Cluj-Napoca, Romania
| | - Alexandra Roman
- Department of Periodontology, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Emergency County Clinical Hospital, Cluj-Napoca, Romania
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9
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Abstract
Although stem cell therapy has tremendous therapeutic potential, clinical translation of stem cell therapy has yet to be fully realized. Recently, patient comorbidities and lifestyle choices have emerged to be important factors in the efficacy of stem cell therapy. Tobacco usage is an important risk factor for numerous diseases, and nicotine exposure specifically has become increasing more prevalent with the rising use of electronic cigarettes. This review describes the effects of nicotine exposure on the function of various stem cells. We place emphasis on the differential effects of nicotine exposure in vitro and as well as in preclinical models. Further research on the effects of nicotine on stem cells will deepen our understanding of how lifestyle choices can impact the outcome of stem cell therapies.
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Affiliation(s)
- Alex Hp Chan
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA 94305, USA.,Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA.,Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - Ngan F Huang
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA 94305, USA.,Stanford Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA.,Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
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10
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Areewong K, Chantaramungkorn M, Khongkhunthian P. Platelet-rich fibrin to preserve alveolar bone sockets following tooth extraction: A randomized controlled trial. Clin Implant Dent Relat Res 2019; 21:1156-1163. [PMID: 31647177 DOI: 10.1111/cid.12846] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/12/2019] [Accepted: 09/07/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND Platelet-rich fibrin (PRF) can be used in the alveolar socket preservation (ARP). However, the hard tissue-regeneration property of PRF in alveolar socket preservation is still unclear. PURPOSE To compare the new bone formation ratio between using PRF as a socket preservation material and normal wound healing, by means of histomorphometric analysis. MATERIALS AND METHODS Thirty-three healthy volunteers were recruited and randomized into PRF and control group. Minimally traumatic extractions were performed. Eighteen patients were treated with ARP using PRF, while the rest were left to heal naturally. Bone specimens were harvested using trephine bur 2 months after the extraction process. Histomorphometric analysis of new bone formation area compared with total socket area was performed using the software Fiji Is Just Image J (version 2, GNU General Public License). RESULTS Thirty-three volunteers were participated. Twenty-eight bone specimens were collected. The new bone formation ratio was higher in PRF group than in control group (31.33 ± 18% and 26.33 ± 19.63%, respectively). However, there was no statistically significant difference in the ratio between the PRF and control groups (P = .431). CONCLUSIONS It may be concluded that the use of PRF in ARP does not statistically significant enhance new bone formation after tooth extraction compared to normal wound healing (P > .05).
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Affiliation(s)
- Kanokporn Areewong
- Center of Excellence for Dental Implantology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Montri Chantaramungkorn
- Department of Restorative Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Pathawee Khongkhunthian
- Center of Excellence for Dental Implantology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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11
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G F Tresguerres F, Cortes ARG, Hernandez Vallejo G, Cabrejos-Azama J, Tamimi F, Torres J. Clinical and radiographic outcomes of allogeneic block grafts for maxillary lateral ridge augmentation: A randomized clinical trial. Clin Implant Dent Relat Res 2019; 21:1087-1098. [PMID: 31419002 DOI: 10.1111/cid.12834] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/15/2019] [Accepted: 07/24/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND A main drawback of bone block graft surgery is the resorption occurring in early stages of healing. To our knowledge, there are no studies comparing outcomes of freeze-dried bone allograft (FDBA) blocks with different architecture. PURPOSE The aim of this work was to investigate different factors that can affect graft resorption and to compare the resorption rates of two different types of allogeneic blocks, corticocancellous and cancellous. MATERIALS AND METHODS A randomized clinical trial was designed. Twenty-eight patients referred for onlay bone augmentation prior to implant placement were included in the study. Preoperative computerized tomography (CT) was taken for all patients. Patients received FDBA blocks of either cancellous or corticocancellous bone obtained from the iliac crest. After a 4-month follow-up, postoperative CT was taken. Then, another surgery was performed, with the purpose to place dental implants. The aforementioned groups were compared for bone resorption and implant outcome using analysis of covariance (ANCOVA) and repeated ANOVA measures, respectively. Demographic data, trabecular bone density, and graft sites were also analyzed. RESULTS A total of 93 implants were placed in the augmented bone sites over 28 patients. A 100% survival rate was achieved during a mean follow-up period of 24 months in both groups. Higher bone resorption rate was found with cancellous bone grafts (29.2% ± 2.6) compared with corticocancellous grafts (19.3% ± 2.3). Moreover, higher resorption rates in patients with lower bone density (<185 Hounsfield Units) (31.7% ± 3.1) and smokers (26.39% ± 2.3) were observed when compared with patients with higher bone density (>185 Hounsfield Units) (16.8% ± 2.1) and nonsmokers (22.1% ± 2.3), respectively. CONCLUSION Within the limitations of this study, these findings indicate that both corticocancellous and cancellous FDBA grafts constitute a clinical acceptable alternative for bone reconstruction, although cancellous grafts present higher resorption rates. Moreover, host factors such as patient's low bone density and smoking habits may also increase graft resorption rates.
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Affiliation(s)
- Francisco G F Tresguerres
- Department of Dental Clinical Specialties, Faculty of Dentistry, Complutense University, Madrid, Spain
| | - Arthur R G Cortes
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Sao Paulo, Brazil
| | - Gonzalo Hernandez Vallejo
- Department of Dental Clinical Specialties, Faculty of Dentistry, Complutense University, Madrid, Spain
| | - Jatsue Cabrejos-Azama
- Department of Dental Clinical Specialties, Faculty of Dentistry, Complutense University, Madrid, Spain
| | - Faleh Tamimi
- Faculty of Dentistry, McGill University, Montreal, Quebec
| | - Jesusis Torres
- Department of Dental Clinical Specialties, Faculty of Dentistry, Complutense University, Madrid, Spain
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