Effects of metformin on bone healing around titanium implants inserted in non-diabetic rats

2016 ◽  
Vol 28 (10) ◽  
pp. e146-e150 ◽  
Author(s):  
Marta Ferreira Bastos ◽  
Caroline Ribeiro Serrão ◽  
Tamires Szeremeske Miranda ◽  
Daniele Ferreira Cruz ◽  
Fernando de Souza Malta ◽  
...  
Keyword(s):  
Bone Healing ◽  
Diabetic Rats ◽  
Titanium Implants

scholarly journals Influence of the Thermal Treatment to Address a Better Osseointegration of Ti6Al4V Dental Implants: Histological and Histomorphometrical Study in a Rabbit Model

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Antonio Scarano ◽  
Ezio Crocetta ◽  
Alessandro Quaranta ◽  
Felice Lorusso
Keyword(s):  
Thermal Treatment ◽  
Dental Implants ◽  
Bone Healing ◽  
Rabbit Model ◽  
Titanium Implants ◽  
Control Group ◽  
Left Femur ◽  
Bone Response ◽  
First Choice ◽  
Significant Difference

Background. Pure titanium continues to be the first choice for dental implants and represents the gold standard for their biocompatibility and physical and mechanical characteristics, while the titanium alloy (Ti6Al4V) has good mechanical properties. The surface structure of the titanium oxide layer formation on the surface influences and improves the bone response around dental implants. Purpose. The purpose of this study is to evaluate the influence of a thermal treatment of Ti6Al4V implant surfaces and the bone healing response in a rabbit model. Methods. Altogether sixteen implants with same design were inserted into the distal femoral metaphysis. A screw (13 mm long, 4 mm in diameter) was inserted in an implant bed. Each rabbit received two implants, one in the left femur and one in the right femur. The samples were histologically and histomorphometrically evaluated at 8 weeks. Results. A statistically significant difference (p = 0.000034) was present histologically in the percentages of bone-implant contact (BIC) between the test group (BIC = 69.25±4.49%.) and control group (BIC = 56.25 ± 4.8%) by one-way analysis of variance (ANOVA). Significance was set at p ≤ 0.05. Conclusions. The outcome of the present study indicates a novel approach to improving bone healing around titanium implants.

Thyroid Hormones May Influence Cortical Bone Healing Around Titanium Implants: A Histometric Study in Rats

2008 ◽  
Vol 79 (5) ◽  
pp. 881-887 ◽  
Author(s):  
Daniela da Silva Feitosa ◽  
Beatriz de Brito Bezerra ◽  
Gláucia Maria Bovi Ambrosano ◽  
Francisco Humberto Nociti ◽  
Márcio Zaffalon Casati ◽  
...  
Keyword(s):  
Thyroid Hormones ◽  
Cortical Bone ◽  
Bone Healing ◽  
Titanium Implants

Role of Metformin in Reversing the Negative Impact of Hyperglycemia on Bone Healing Around Implants Inserted in Type 2 Diabetic Rats

2017 ◽  
Vol 32 (3) ◽  
pp. 547-554 ◽  
Author(s):  
Caroline Serrão ◽  
Marta Bastos ◽  
Daniele Cruz ◽  
Fernando Malta ◽  
Paolla Vallim ◽  
...  
Keyword(s):  
Bone Healing ◽  
Negative Impact ◽  
Diabetic Rats ◽  
Type 2 Diabetic

Effects of local infiltration of insulin around titanium implants in diabetic rats

2011 ◽  
Vol 49 (3) ◽  
pp. 225-229 ◽  
Author(s):  
Baogang Wang ◽  
Yingliang Song ◽  
Feng Wang ◽  
Dehua Li ◽  
Hepeng Zhang ◽  
...  
Keyword(s):  
Diabetic Rats ◽  
Titanium Implants ◽  
Local Infiltration

scholarly journals PPARβ/δ accelerates bone regeneration in diabetic mellitus by enhancing AMPK/mTOR pathway-mediated autophagy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Miao Chen ◽  
Dian Jing ◽  
Rui Ye ◽  
Jianru Yi ◽  
Zhihe Zhao
Keyword(s):  
Bone Regeneration ◽  
Osteogenic Differentiation ◽  
Bone Healing ◽  
High Glucose ◽  
Diabetic Rats ◽  
Diabetic Patients ◽  
Regulatory Effect ◽  
Compound C ◽  
High Glucose Condition ◽  
Glucose Condition

Abstract Background Diabetic patients are more vulnerable to skeletal complications. Peroxisome proliferators-activated receptor (PPAR) β/δ has a positive regulatory effect on bone turnover under physiologic glucose concentration; however, the regulatory effect in diabetes mellitus has not been investigated yet. Herein, we explored the effects of PPARβ/δ agonist on the regeneration of diabetic bone defects and the osteogenic differentiation of rat bone marrow mesenchymal stem cells (rBMSCs) under a pathological high-glucose condition. Methods We detected the effect of PPARβ/δ agonist on osteogenic differentiation of rBMSCs in vitro and investigated the bone healing process in diabetic rats after PPARβ/δ agonist treatment in vivo. RNA sequencing was performed to detect the differentially expressed genes and enriched pathways. Western blot was performed to detect the autophagy-related protein level. Laser confocal microscope (LSCM) and transmission electron microscope (TEM) were used to observe the formation of autophagosomes. Results Our results demonstrated that the activation of PPARβ/δ can improve the osteogenic differentiation of rBMSCs in high-glucose condition and promote the bone regeneration of calvarial defects in diabetic rats, while the inhibition of PPARβ/δ alleviated the osteogenic differentiation of rBMSCs. Mechanistically, the activation of PPARβ/δ up-regulates AMPK phosphorylation, yielding mTOR suppression and resulting in enhanced autophagy activity, which further promotes the osteogenic differentiation of rBMSCs in high-glucose condition. The addition of AMPK inhibitor Compound C or autophagy inhibitor 3-MA inhibited the osteogenesis of rBMSCs in high-glucose condition, suggesting that PPARβ/δ agonist promotes osteogenic differentiation of rBMSCs through AMPK/mTOR-regulated autophagy. Conclusion In conclusion, our study demonstrates the potential role of PPARβ/δ as a molecular target for the treatment of impaired bone quality and delayed bone healing in diabetic patients for the first time.

scholarly journals Effects of Local Opioid Antagonist on Diabetic Fracture Rat Model

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0017
Author(s):  
Jarrett D. Cain ◽  
Michelle Titunick ◽  
Patricia McLaughlin ◽  
Ian Zagon
Keyword(s):  
Growth Factor ◽  
Fracture Healing ◽  
Bone Healing ◽  
Calcium Sulfate ◽  
Bone Fractures ◽  
Diabetic Rats ◽  
Receptor Expression ◽  
Opioid Antagonist ◽  
Diabetic Patients ◽  
Opioid Growth Factor

Category: Diabetes Introduction/Purpose: Complications associated with the diabetes include increased incidence of fracture healing, delayed fracture healing, delayed osteoblasts cell replication, decreased angiogenesis, migration and/or osteoblast cell differentiation. The cellular events involved in bone healing are adversely affected by diabetes; however, can be modulated by the Opioid Growth Factor (OGF)–OGF receptor (OGFr) is an inhibitory peptide that downregulates DNA synthesis in a tissue nonspecific manner. Diabetes is associated with elevated serum levels of OGF and dysregulation of the OGFr leading to multiple complications related to healing, sensitivity, and regeneration. This study explores the presence and function of the OGF-OGFr axis in bone tissue from type 1 diabetic rats examining intact and fractured femurs during early phases of the repair process Methods: Seven-week-old Sprague Dawley rats were injected with streptozotocin (40mg/kg i.p.) to induce T1D; other rats received buffer only and served as controls. After one month, hyperglycemia rats underwent surgery to produce a fracture at the distal third of the femur. Four diabetic rats received opioid antagoinist (naltrexone) and calcium sulfate and all remaining rats received calcium sulfate with water only. X-rays were taken immediately after surgery and after rats were euthanized on post-surgery; femur and tibia were collected for protein isolation, western blot analysis along with frozen or paraffin-embedded for histological analysis Results: Immunofluorescence indicated approximately 90% increase in opioid growth factor receptor expression in diabetic femurs compared to age-matched normal femurs. Western Blotting also suggested an increase in the receptor protein in diabetic bones relative to normal bone. TRAP staining for osteoclasts was greater in control and opioid antagonist-treated diabetic fractures when compared to the number of osteoclasts in vehicle-treated diabetic fractured femurs. Safranin O stained sections revealed approximately more bone in opioid growth receptor antagonist-treated diabetic bone fractures than in vehicle-treated bone fractures Conclusion: These data support our hypothesis that expression levels of OGFr are dysregulated in the bone of diabetic patients leading to complications in bone healing. Moreover, modulation of the OGF-OGFr pathway with receptor antagonists restored some aspects of bone healing. With further study, these preliminary results support the role of the OGF-OGFr axis in treatment of diabetic bone healing. New therapies to target dysregulation of the OGF-OGFr regulatory pathway in diabetes would provide a safe and effective disease-modifying treatment for delayed bone healing.

scholarly journals Proteomics of regenerated tissue in response to a titanium implant with a bioactive surface in a rat tibial defect model

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Raluca M. Boteanu ◽  
Viorel I. Suica ◽  
Luminita Ivan ◽  
Florentina Safciuc ◽  
Elena Uyy ◽  
...  
Keyword(s):  
Bone Healing ◽  
Cultured Cells ◽  
Traumatic Event ◽  
Healing Process ◽  
Dip Coating ◽  
Polymer Coatings ◽  
Titanium Implants ◽  
Mass Spectrometry Analysis ◽  
Defect Model ◽  
Tibial Defect

Abstract Due to their excellent mechanical and biocompatibility properties, titanium-based implants are successfully used as biomedical devices. However, when new bone formation fails for different reasons, impaired fracture healing becomes a clinical problem and affects the patient's quality of life. We aimed to design a new bioactive surface of titanium implants with a synergetic PEG biopolymer-based composition for gradual delivery of growth factors (FGF2, VEGF, and BMP4) during bone healing. The optimal architecture of non-cytotoxic polymeric coatings deposited by dip coating under controlled parameters was assessed both in cultured cells and in a rat tibial defect model (100% viability). Notably, the titanium adsorbed polymer matrix induced an improved healing process when compared with the individual action of each biomolecules. High-performance mass spectrometry analysis demonstrated that recovery after a traumatic event is governed by specific differentially regulated proteins, acting in a coordinated response to the external stimulus. Predicted protein interactions shown by STRING analysis were well organized in hub-based networks related with response to chemical, wound healing and response to stress pathways. The proposed functional polymer coatings of the titanium implants demonstrated the significant improvement of bone healing process after injury.

scholarly journals Berberine in Combination with Insulin Has Additive Effects on Titanium Implants Osseointegration in Diabetes Mellitus Rats

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Li Lu ◽  
Huang Zhijian ◽  
Li Lei ◽  
Chen Wenchuan ◽  
Zhu Zhimin
Keyword(s):  
Combined Treatment ◽  
Insulin Injection ◽  
Serum Levels ◽  
Diabetic Rats ◽  
Titanium Implants ◽  
Sprague Dawley ◽  
Machined Surface ◽  
Double Labeling ◽  
The Right ◽  
Cp Ti

This study evaluated the effects of berberine in combination with insulin on early osseointegration of implants in diabetic rats. Fifty male Sprague-Dawley rats were randomly divided into 5 groups: healthy rats were used as control (HC), and streptozotocin-induced diabetic rats were treated with insulin, berberine, berberine + insulin (IB), or no treatment. Each rat received one machined-surface cp-Ti implant into the right tibia and was given insulin injection and/or gavage feeding with berberine daily for 8 weeks until being sacrificed. Serum levels of alkaline phosphatase (ALP) and bone gamma-carboxyglutamic acid-containing protein (BGP) were analyzed in each group. Peri-implant mineral apposition was marked by fluorochrome double-labeling and osseointegration was histomorphologically examined. The ALP and BGP levels decreased in diabetic rats but were successfully corrected by insulin and berberine combined treatment. Moreover, untreated diabetic rats had less labeled mineral apposition and impaired osseointegration. In contrast, Groups I, B, and IB were observed with increased peri-implant bone formation. The combination treatment of insulin and berberine was more effective than each administrated as a monotherapy. These results suggest that berberine combined with insulin could promote osseointegration in diabetic rats, thereby highlighting its potential application to patients, though further studies are needed.

Effect of FK-506 (tacrolimus) therapy on bone healing of titanium implants: a histometric and biomechanical study in mice

2016 ◽  
Vol 125 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Xiaofei Zheng ◽  
Anchun Mo ◽  
Yuan Wang ◽  
Yuchen Guo ◽  
Yunshu Wu ◽  
...  
Keyword(s):  
Bone Healing ◽  
Biomechanical Study ◽  
Titanium Implants ◽  
Fk 506 ◽  
Tacrolimus Therapy

High-throughput gene expression analysis in bone healing around titanium implants by DNA microarray

2008 ◽  
Vol 19 (2) ◽  
pp. 173-181 ◽  
Author(s):  
Norinaga Kojima ◽  
Shogo Ozawa ◽  
Yasuhiro Miyata ◽  
Hideki Hasegawa ◽  
Yoshinobu Tanaka ◽  
...  
Keyword(s):  
Gene Expression ◽  
Dna Microarray ◽  
Expression Analysis ◽  
High Throughput ◽  
Bone Healing ◽  
Gene Expression Analysis ◽  
Titanium Implants ◽  
High Throughput Gene Expression
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