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Biomedicines Apr 2024Osteopontin (OPN) and osteoprotegerin (OPG) are glycoproteins that participate in the regulation of tissue biomineralization. The aim of the project is to verify the...
Osteopontin (OPN) and osteoprotegerin (OPG) are glycoproteins that participate in the regulation of tissue biomineralization. The aim of the project is to verify the hypothesis that the content of OPN and OPG in the aorta walls increases with the development of atherosclerosis and that these proteins are quantitatively related to the main proteins in the extracellular arteries matrix. Quantitative and qualitative analyses of the OPN and OPG content in 101 aorta sections have been conducted. Additionally, an enzyme-linked immunosorbent assay (ELISA) test has been performed to determine the collagen types I-IV and elastin content in the tissues. Correlations between the biochemical data and patients' age/sex, atherosclerosis stages, and calcification occurrences in the tissue have been established. We are the first to report correlations between OPN or OPG and various types of collagen and elastin content (OPG/type I collagen correlation: r = 0.37, = 0.004; OPG/type II collagen: r = 0.34, = 0.007; OPG/type III collagen: r = 0.39, = 0.002, OPG/type IV collagen: r = 0.27, = 0.03; OPG/elastin: r = 0.42, = 0.001; OPN/collagen type I: r = 0.34, = 0.007; OPN/collagen type II: r = 0.52, = 0.000; OPN/elastin: r = 0.61, = 0.001). OPN overexpression accompanies calcium deposit (CA) formation with the protein localized in the calcium deposit, whereas OPG is located outside the CA. Although OPN and OPG seem to play a similar function (inhibiting calcification), these glycoproteins have different tissue localizations and independent expression regulation. The independent expression regulation presumably depends on the factors responsible for stimulating the synthesis of collagens and elastin.
PubMed: 38672202
DOI: 10.3390/biomedicines12040847 -
Journal of Oral and Maxillofacial... Dec 2023Concentrated platelet derivatives (PDs) such as platelet-rich plasma (PRP) and platelet-rich fibrin (PRF) have been extensively applied in tissue engineering, and...
PURPOSE
Concentrated platelet derivatives (PDs) such as platelet-rich plasma (PRP) and platelet-rich fibrin (PRF) have been extensively applied in tissue engineering, and particularly in various fields of regenerative dentistry. The purpose of the present citation analysis was to compile the 100 top-cited articles on the PDs uses in oral and maxillofacial surgery.
METHODS
A cross-sectional search of the relevant studies in the Web of Science citation database was conducted to identify the 100 most-cited articles. All the included papers consisted of independent variables of this analysis. Covariates that were further considered were basic bibliometric indexes, such as publication year, publishing journal, authorship, institution and country of origin, study design, and field of study. The primary outcome variables were citation counts and citation density. A descriptive analysis of secondary outcome variables, namely bibliographic data such as keyword, abstract, title term co-occurrence analysis, thematic map and wordcloud analysis, was performed using the bibliometrix R and VOSviewer software.
RESULTS
The total citation count for the 100 most-cited articles ranged from 85 to 1821, with 2002 being the most productive year. With 15 articles, the Journal of Periodontology was the most represented journal, followed closely by the Journal of Oral and Maxillofacial Surgery and Clinical Oral Implants Research. The United States published the largest number of papers. Original basic science research studies on implantology and biology dominated the top-cited list. Randomized clinical trials and systematic reviews were adequately represented in the top-cited list. Platelet-derived growth factor and osteoprotegerin represented emerging minimally developed themes, while PRP, growth factors and fibrin, along with the applications of PRF in gingival recession and intra bony defects, were considered important motor themes.
CONCLUSIONS
The current study provides a complete list and in-depth analysis of the 100 most-cited publications relevant to PDs use in oral and maxillofacial surgery, identifying the most important research topics, most impactful authors, institutions, and countries. Though PRP studies were leading the top-cited list, publications focusing on PRF pesented higher citation density values, indicating a continuously increasing citation rate.
Topics: Humans; United States; Cross-Sectional Studies; Bibliometrics; Surgery, Oral; Authorship
PubMed: 37783365
DOI: 10.1016/j.joms.2023.09.010 -
Frontiers in Bioengineering and... 2023There are considerable socioeconomic costs associated with bone defects, making regenerative medicine an increasingly attractive option for treating them. Chitosan is a...
There are considerable socioeconomic costs associated with bone defects, making regenerative medicine an increasingly attractive option for treating them. Chitosan is a natural biopolymer; it is used in approaches for sustained slow release and osteogenesis, and metformin has osteoinductivity. Our study aimed to synthesize chitosan and human serum albumin (HSA) with a metformin nanoformulation to evaluate the therapeutic effects of this nanoformulation on bone defects . A pluripotent differentiation assay was performed on mouse bone marrow mesenchymal stem cells (BMSCs). Cell Counting Kit-8 was used to detect whether metformin was toxic to BMSCs. The osteogenesis-related gene expression of osteocalcin (OCN) and osteoprotegerin (OPG) from BMSCs was tested by real-time polymerase chain reaction (PCR). HSA, metformin hydrochloride, and chitosan mixtures were magnetically stirred to finish the assembly of metformin/HSA/chitosan nanoparticles (MHC NPs). The MHC NPs were characterized using transmission electron microscopy (TEM), dynamic light scattering (DLS), and Fourier transform infrared spectroscopy (FT-IR). To test the expression of OCN and OPG, western blot were used. MHC NPs were evaluated for their osteoinductivity using alkaline phosphatase (ALP). BMSCs successfully differentiated into osteogenic and adipogenic lineages . According to real-time PCR, a 50 µM concentration of metformin promoted osteogenesis in BMSCs most effectively by upregulating the osteogenic markers OCN and OPG. The microstructure of MHC NPs was spherical with an average nanosize of 20 ± 4.7 nm and zeta potential of -8.3 mV. A blueshift and redshift were observed in MHC NPs following exposure to wavelengths of 1,600-1,900 and 2,000-3,700 nm, respectively. The encapsulation (%) of metformin was more than 90%. The simulation study showed that MHC NPs have good stability and it could release metformin slowly at room temperature. Upon treatment with the studied MHC NPs for 3 days, ALP was significantly elevated in BMSCs. In addition, the MHC NPs-treated BMSCs upregulated the expression of OPG and OCN, as shown by real-time PCR and western blot. MHC NPs have a stable metformin release effect and osteogenic ability. Therefore, as a derived synthetic biopolymer, it is expected to play a role in bone tissue regeneration.
PubMed: 37476483
DOI: 10.3389/fbioe.2023.1169496 -
Journal of Dentistry Jul 2024To perform a comprehensive quantitative and qualitative analysis of the findings from previously published meta-analyses and to assess existing biases. (Review)
Review
OBJECTIVES
To perform a comprehensive quantitative and qualitative analysis of the findings from previously published meta-analyses and to assess existing biases.
DATA/SOURCES
A search was conducted for meta-analyses of observational studies investigating the association between any risk factor and peri‑implantitis in PubMed, Scopus, Cochrane Database of Systematic Reviews, and Epistemonikos, from inception until October 2023 (PROSPERO: CRD42024512408).
STUDY SELECTION
From a total of 5002 publications, 51 full-text articles were evaluated for eligibility, and 12 articles that described 41 unique meta-analyses evaluating the association between risk factors and periimplantitis were selected. Among 41 associations, 24 associations were significant. None of the associations were graded as convincing evidence. Two associations, presence of periodontitis (OR = 3.84 [95 % CI 2.58,5.72]) and cigarette smoking (RR=2.07 [95 % CI 1.41,3.04]) were graded as highly suggestive. Eight associations, diabetes mellitus, hyperglycaemia, lack of prophylaxis, history of chronic periodontal disease, ongoing or history of periodontal disease, implants located in the anterior region of the jaw (maxillary and mandibular), osteoprotegerin (OPG) gene polymorphisms, and lack of keratinized mucosal width were graded as suggestive evidence.
CONCLUSIONS
Periodontitis and cigarette smoking are highly suggestive risk factors for peri‑implantitis. The remaining risk factors which are suggestive require more high-quality studies to be performed to upgrade the level of evidence.
CLINICAL SIGNIFICANCE
The highly suggestive and suggestive risk factors for peri‑implantitis summarized in this umbrella review should be rigorously assessed, monitored and managed by clinicians to reduce the risk peri‑implantitis, as well as to form part of the preoperative consent process.
Topics: Humans; Peri-Implantitis; Risk Factors; Observational Studies as Topic; Meta-Analysis as Topic; Dental Implants; Periodontitis; Bias
PubMed: 38762079
DOI: 10.1016/j.jdent.2024.105065 -
PeerJ 2024Physical activity is an important factor in modelling the remodelling and metabolism of bone tissue. The aim of the study was to evaluate the changes in indices...
BACKGROUND
Physical activity is an important factor in modelling the remodelling and metabolism of bone tissue. The aim of the study was to evaluate the changes in indices demonstrating bone turnover in men under the influence of maximum-intensity exercise.
METHODS
The study involved 33 men aged 20-25, divided into two groups: experimental ( = 15) and control ( = 18). People training medium- and long-distance running were assigned to the experimental group, and non-training individuals to the control. Selected somatic, physiological and biochemical indices were measured. The level of aerobic fitness was determined using a progressively increasing graded test (treadmill test for subjective fatigue). Blood samples for determinations were taken before the test and 60 minutes after its completion. The concentration of selected bone turnover markers was assessed: bone fraction of alkaline phosphatase (b-ALP), osteoclacin (OC), N-terminal cross-linked telopeptide of the alpha chain of type I collagen (NTx1), N-terminal propeptide of type I progolagen (PINP), osteoprotegerin (OPG). In addition, the concentration of 25(OH)D3 prior to the stress test was determined. Additionally, pre and post exercise, the concentration of lactates in the capillary blood was determined.
RESULTS
When comparing the two groups, significant statistical differences were found for the mean level of: 25(OH)D3 ( = 0.025), b-ALP ( < 0.001), OC ( = 0.004) and PINP ( = 0.029) prior to the test. On the other hand, within individual groups, between the values pre and post the stress test, there were statistically significant differences for the average level of: b-ALP ( < 0.001), NTx1 ( < 0.001), OPG ( = 0.001) and PINP ( = 0.002).
CONCLUSION
A single-session maximum physical effort can become an effective tool to initiate positive changes in bone turnover markers.
Topics: Humans; Male; Adult; Biomarkers; Bone Remodeling; Exercise; Young Adult; Osteoprotegerin; Alkaline Phosphatase; Collagen Type I; Peptides; Running; Exercise Test; Procollagen
PubMed: 38770097
DOI: 10.7717/peerj.17258 -
Journal of Orthopaedic Surgery and... Jul 2023Patellar instability (PI) at an early age is believed closely correlated with bone loss in the development of the femoral trochlea and can cause trochlear dysplasia....
INTRODUCTION
Patellar instability (PI) at an early age is believed closely correlated with bone loss in the development of the femoral trochlea and can cause trochlear dysplasia. However, the molecular mechanism of PI-induced bone loss has not been established. The Janus kinase (JAK)/signal transducers and activators of transcription (STAT) signaling pathway plays an important role in bone development by regulating the expression of osteoprotegerin (OPG) and receptor activator of nuclear factor kappa B ligand (RANKL). The aim of this study was to explore the association of JAK1/STAT3 signaling to PI-induced subchondral bone loss in the femoral trochlea.
METHODS
Four-week-old male C57BL/6 mice were randomly divided into two groups (n = 50/group). Mice in the experimental group underwent surgery to induce PI. Distal femurs were collected 2 and 4 weeks after surgery (n = 25 knees/each time point, each group). Microcomputed tomography and histological observations were performed to investigate the morphology of the femoral trochlea and changes in bone mass. qPCR, western blot, and immunohistochemistry analyses were performed to evaluate the expression of JAK1, STAT3, RANKL, and OPG in subchondral bone. A t test was performed for the statistical analysis; a P value < 0.05 was considered to be statistically significant.
RESULTS
In the experimental group, subchondral bone loss in the femoral trochlea was observed two and four weeks after PI; morphological changes, such as a flatter trochlear groove and an increased sulcus angle, were observed in the femoral trochlea; qPCR, western blot, and immunohistochemistry analyses showed higher expression of JAK1, STAT3, and RANKL and lower expression of OPG (P < 0.05).
CONCLUSION
PI-induced subchondral bone loss in the femoral trochlea and resulted in trochlear dysplasia in growing mice. This bone loss is associated with activation of the JAK1/STAT3 signaling pathway, which weakens the function of osteoblasts and stimulates both formation and function of osteoclasts.
Topics: Male; Animals; Mice; Mice, Inbred C57BL; Joint Instability; X-Ray Microtomography; Patellofemoral Joint; Bone Diseases, Metabolic; Femur
PubMed: 37488636
DOI: 10.1186/s13018-023-04019-6 -
Molecular Medicine Reports Jul 2024Periodontal disease is a common infectious disease that can lead to the loss of teeth. Hower how to effectively suppress the inflammation with medication is unclear. The...
Periodontal disease is a common infectious disease that can lead to the loss of teeth. Hower how to effectively suppress the inflammation with medication is unclear. The aim of the present study was to investigate the anti‑inflammatory effect of Oroxylin A in periodontitis and its potential role through heme oxygenase‑1 (HO‑1). Primary rat gingival fibroblasts (RGFs) were cultured using the tissue block method and identified by immunofluorescence. Following lipopolysaccharide (LPS) stimulation of RGFs, Oroxylin A was administered at 50, 100, 200 or 400 µg/ml. Reverse transcription‑quantitative PCR was used to assess mRNA expression of cyclooxygenase (COX)‑2, TNF‑α, RANKL and osteoprotegerin (OPG). Western blotting was used to detect protein expression levels of COX ‑2, TNF‑α, RANKL and OPG. Following HO‑1 knockdown, the same treatment was performed. The expression of COX‑2 in rat gingival tissue was observed by immunohistochemistry. One‑way analysis of variance and Student's t test were used for statistical analysis. Oroxylin A downregulated mRNA expression of COX‑2, TNF‑α, RANKL and OPG in LPS‑induced RGFs. With increase of Oroxylin A dose, the expression of HO‑1 was gradually upregulated. When HO‑1 was knocked down, Oroxylin A did not downregulate the expression of COX‑2, TNF‑α, RANKL and OPG in LPS‑induced RGFs. Immunohistochemical results showed that expression of COX‑2 was downregulated by Oroxylin A, and the expression of TNF‑α, RANKL and OPG were also downregulated. Oroxylin A decreased expression of inflammatory cytokines in LPS‑induced RGFs and had a good inhibitory effect on periodontitis in rats.
Topics: Animals; Rats; Flavonoids; Periodontitis; RANK Ligand; Male; Cyclooxygenase 2; Fibroblasts; Osteoprotegerin; Lipopolysaccharides; Gingiva; Tumor Necrosis Factor-alpha; Cytokines; Heme Oxygenase-1; Cells, Cultured; Rats, Sprague-Dawley
PubMed: 38785151
DOI: 10.3892/mmr.2024.13249 -
Archives of Oral Biology Sep 2023This study aimed to explore the effect of periostin in the osteogenic abilities of dental follicle stem cells (DFSCs) and DFSC sheets in the inflammatory...
OBJECTIVE
This study aimed to explore the effect of periostin in the osteogenic abilities of dental follicle stem cells (DFSCs) and DFSC sheets in the inflammatory microenvironment.
DESIGN
DFSCs were isolated from dental follicles and identified. A lentiviral vector was used to knock down periostin in DFSCs. 250 ng/ml lipopolysaccharide from Porphyromonas gingivalis (P.g-LPS) was used to construct the inflammatory microenvironment. Osteogenic differentiation was evaluated by alizarin red staining, quantitative real-time polymerase chain reaction (qRT-PCR), and western blot. The formation of extracellular matrix was assessed by qRT-PCR and immunofluorescence. The expressions of receptor activator of nuclear factor kappa-B ligand (RANKL) and osteoprotegerin (OPG) were measured by western blot.
RESULTS
Knockdown of periostin inhibited osteogenic differentiation and promoted adipogenic differentiation of DFSCs. In an inflammatory microenvironment, knockdown of periostin attenuated the proliferation and osteogenic differentiation of DFSCs. Knockdown of periostin inhibited the formation of extracellular matrix collagen I (COL-I), fibronectin, and laminin in DFSC sheets, but did not affect the expression of osteogenesis-related markers alkaline phosphatase (ALP) and osteocalcin (OCN). In the inflammatory microenvironment, knocking down periostin inhibited the expression of OCN and OPG in DFSC sheets, and promoted the expression of RANKL.
CONCLUSION
Periostin played a key role in maintaining the osteogenic abilities of DFSCs and DFSC sheets in the inflammatory microenvironment and might be an important molecule in the process of DFSCs coping with inflammatory microenvironment and promoting periodontal tissues regeneration.
Topics: Osteogenesis; Dental Sac; Cells, Cultured; Stem Cells; Cell Differentiation; Osteocalcin; Periodontal Ligament
PubMed: 37320885
DOI: 10.1016/j.archoralbio.2023.105737 -
Poultry Science Jun 2024Skeletal disorders can seriously threaten the health and the performance of poultry, such as tibial dyschondroplasia (TD) and osteoporosis (OP). Oligomeric...
Skeletal disorders can seriously threaten the health and the performance of poultry, such as tibial dyschondroplasia (TD) and osteoporosis (OP). Oligomeric proanthocyanidins (OPC) are naturally occurring polyphenolic flavonoid compounds that can be used as potential substances to improve the bone health and the growth performance of poultry. Eighty 7-day-old green-eggshell yellow feather layer chickens were randomly divided into 4 groups: basal diet and basal diet supplementation with 25, 50, and 100 mg/kg OPC. The results have indicated that the growth performance and bone parameters of chickens were significantly improved supplementation with OPC in vivo, including the bone volume (BV), the bone mineral density (BMD) and the activities of antioxidative enzymes, but ratio of osteoprotegerin (OPG)/receptor activator of NF-κB (RANK) ligand (RANKL) was decreased. Furthermore, primary bone marrow mesenchymal stem cells (BMSCs) and bone marrow monocytes/macrophages (BMMs) were successfully isolated from femur and tibia of chickens, and co-cultured to differentiate into osteoclasts in vitro. The osteogenic differentiation derived from BMSCs was promoted treatment with high concentrations of OPC (10, 20, and 40 µmol/L) groups in vitro, but emerging the inhibition of osteoclastogenesis by increasing the ratio of OPG/RANKL. In contrary, the osteogenic differentiation was also promoted treatment with low concentrations of OPC (2.5, 5, and 10 µmol/L) groups, but osteoclastogenesis was enhanced by decreasing the ratio of OPG/RANKL in vitro. In addition, OPG inhibits the differentiation and activity of osteoclasts by increasing the autophagy in vitro. Dietary supplementation of OPC can improve the growth performance of bone and alter the balance of osteoblasts and osteoclasts, thereby improving the bone health of chickens.
Topics: Animals; Osteoprotegerin; RANK Ligand; Proanthocyanidins; Chickens; Osteogenesis; Chick Embryo; Animal Feed; Osteoclasts; Diet; Random Allocation; Dietary Supplements; Avian Proteins; Dose-Response Relationship, Drug
PubMed: 38631227
DOI: 10.1016/j.psj.2024.103706 -
Journal of Applied Oral Science :... 2023Fetal bovine serum (FBS) is the most used supplement in culture media; however, it may interfere with in vitro assays via effects on cell proliferation and cytokine...
BACKGROUND
Fetal bovine serum (FBS) is the most used supplement in culture media; however, it may interfere with in vitro assays via effects on cell proliferation and cytokine production. The ideal FBS concentration for assays using apical papilla cells (APCs) remains unknown. Therefore, this study aimed to evaluate the effects of FBS on APC activation, cell viability/proliferation, and cytokine production.
METHODOLOGY
Human APCs were cultured, plated, and maintained in media containing increasing concentrations of FBS for 24 h, 48 h, 72 h, 7 days, and 14 days in the presence of Lipopolysaccharide (LPS - 1 µg/mL). At each time point, the cells were subjected to the MTT assay. The cytokines transforming growth factor (TGF)-β1, osteoprotegerin (OPG), and interleukin (IL)-6, along with the chemokine CCL2, were quantified using the enzyme-linked immunosorbent assay at the 24-h time-point. Statistical analysis was performed using two-way analysis of variance (ANOVA) followed by Tukey's post-hoc test (p<0.05).
RESULTS
In general, APCs exhibited increasing metabolic activity in an FBS concentration-dependent fashion, regardless of the presence of LPS. In contrast, FBS interfered with the production of all the cytokines evaluated in this study, affecting the response induced by the presence of LPS.
CONCLUSION
FBS increased APC metabolism in a concentration-dependent manner and differentially affected the production of TGF-β1, OPG, IL-6, and CCL2 by APCs in vitro.
Topics: Humans; Cytokines; Lipopolysaccharides; Serum Albumin, Bovine; Interleukin-6; Cells, Cultured
PubMed: 37493700
DOI: 10.1590/1678-7757-2023-0020