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Supanumpar N, Pisarnturakit PP, Charatcharoenwitthaya N, Subbalekha K. Physicians' awareness of medication-related osteonecrosis of the jaw in patients with osteoporosis. PLoS One 2024; 19:e0297500. [PMID: 38277387 PMCID: PMC10817186 DOI: 10.1371/journal.pone.0297500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 01/06/2024] [Indexed: 01/28/2024] Open
Abstract
A serious adverse effect of antiresorptive drugs, which are widely used to treat osteoporosis, is medication-related osteonecrosis of the jaw (MRONJ). Physicians can reduce the risk of MRONJ by educating patients and emphasizing the importance of good oral health. However, limited information is available regarding physicians' awareness and clinical practices associated with MRONJ. Hence, this study aimed to examine physicians' awareness related to MRONJ and associated clinical practices. This study was a cross-sectional study conducted from December 2022 to February 2023. An online self-administered questionnaire was sent to physicians in Thailand who prescribed antiresorptive drugs for osteoporosis. Most respondents agreed that antiresorptive drugs might cause MRONJ (92.3%), poor oral health increased the risk of MRONJ (84%), and MRONJ is an important consideration in patients with osteoporosis (85%). Of the respondents, 48.1% and 15.5% always referred patients to dentists before and during antiresorptive therapy, respectively. Approximately 60% of physicians informed patients of the MRONJ risk before prescribing antiresorptive drugs, and 30% inquired about patients' oral symptoms at the follow-up visit. Overall, 44% of physicians advised patients to receive oral health care; the most common reason for not advising this was that respondents did not consider themselves to be adequately knowledgeable to detect oral health problems. These findings indicate that while most physicians who prescribed antiresorptive drugs for osteoporosis were aware of and considered MRONJ in their practice, several took insufficient action to prevent it. This highlights the need to emphasize clinical practice guidelines and collaboration between physicians and dentists.
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Affiliation(s)
- Nachapol Supanumpar
- Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Chulalongkorn University, Bangkok, Thailand
| | | | | | - Keskanya Subbalekha
- Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Chulalongkorn University, Bangkok, Thailand
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2
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Ibrahim HA, Nahari MH, Al-khadher MA, Ismail NI, Elgzar WT. Gender Disparities in Osteoporosis Knowledge, Health Beliefs and Preventive Behaviors in Najran City, Saudi Arabia. Nutrients 2023; 15:3658. [PMID: 37630848 PMCID: PMC10457756 DOI: 10.3390/nu15163658] [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: 07/04/2023] [Revised: 07/24/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
Osteoporosis is a chronic bone disease affecting both men and women, but it is more prevalent in women. Promoting a healthy lifestyle among adults, particularly women, is crucial in preventing and reducing the osteoporosis impact. This study aimed to compare the osteoporosis knowledge, health beliefs and preventive behaviors among adult male and female in Najran city Saudi Arabia. This cross-sectional study was performed on 516 males and 581 females in Najran City, Saudi Arabia, from January to April 2023. The data collection instrument is a self-reported online questionnaire consisting of basic data, the Osteoporosis Preventive Behavior (OPB) scale, the osteoporosis knowledge assessment tool, and the osteoporosis health belief scale. The results revealed that male participants had a higher OPB (26.70) than females (20.32). However, females have a higher knowledge (10.71), perceive themselves as more susceptible to osteoporosis (20.34) and had higher exercise barriers (20.11) compared to males (9.97, 18.79 and 19.20, respectively). Statistically significant correlations (p < 0.001) were observed between OPB, osteoporosis knowledge (r = 0.26), perceived susceptibility (r = 0.33), severity (r = 0.53), exercise (r = 0.54) and calcium (r = 0.33) benefits, exercise (r = 0.40) and calcium (r = 0.81) barriers and health motivation (r = 0.37). The study concluded significant disparities between males and females regarding osteoporosis-related knowledge, preventive behaviors, perceived susceptibility, severity, and exercise perceived barriers. The results suggest gender-based educational interventions to enhance OPB by addressing osteoporosis-related knowledge, perceived susceptibility, seriousness, benefits, and health motivation.
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Affiliation(s)
- Heba A. Ibrahim
- Department of Maternity and Childhood Nursing, Nursing College, Najran University, Najran 66441, Saudi Arabia;
| | - Mohammed H. Nahari
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Najran University, Najran 66441, Saudi Arabia;
| | - Mugahed A. Al-khadher
- Department of Medical Surgical Nursing, Nursing College, Najran University, Najran 66441, Saudi Arabia;
| | - Nemat I. Ismail
- Department of Obstetrics and Gynecology Nursing, Nursing College, Damanhour University, Damanhour 22511, Egypt;
| | - Wafaa T. Elgzar
- Department of Maternity and Childhood Nursing, Nursing College, Najran University, Najran 66441, Saudi Arabia;
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Wang L, Li Y. The impact of communication on women's risk perceptions for osteoporosis in China. Women Health 2021; 61:845-853. [PMID: 34525900 DOI: 10.1080/03630242.2021.1979165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Osteoporosis (OP) is an increasingly important public health issue, women constitute approximately 80% of those diagnosed with OP. Improved risk perception regarding OP is important for early prevention. This study aimed to examine the association among socio-demographic, communication related variables and risk perception regarding OP. An online survey with 950 participants was conducted. The survey comprised 19 questions pertaining to lifestyle, general health, bone fracture awareness and demographics. Bivariate analyses were used to examine unadjusted relations among socio-demographic, communication related variables and comparative perceived risk of OP. Ordinary least squares (OLS) regression analysis was used to analyze the association between communication media exposure, information processing mode, educational level, self-efficacy and risk perception for OP. Results suggest that some socio-demographic variables (gender, educational level, income) and some communication relevant variables (communication media exposure, the ability to acquire information and systematic information processing) were positively associated with higher OP risk perception, while self-efficacy was negative factor. The study also showed that heuristic-systematic processing and self-efficacy were found to moderate the impact of communication media on risk perceptions. Improved understanding of the impact of communication on risk perception may aid in the development of effective intervention strategies to reduce the burden of OP.
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Affiliation(s)
- Li Wang
- College of Humanities, Huzhou University, Huzhou, China
| | - Yongjin Li
- College of Life Sciences, Huzhou University, Huzhou, China
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Montazeri-Najafabady N, Ghasemi Y, Dabbaghmanesh MH, Ashoori Y, Talezadeh P, Koohpeyma F, Abootalebi SN, Gholami A. Exploring the bone sparing effects of postbiotics in the post-menopausal rat model. BMC Complement Med Ther 2021; 21:155. [PMID: 34049521 PMCID: PMC8161980 DOI: 10.1186/s12906-021-03327-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 05/13/2021] [Indexed: 12/20/2022] Open
Abstract
Background Post-menopausal osteoporosis is a concern of health organizations, and current treatments do not seem enough. Postbiotics as bioactive compounds produced by probiotics may be an attractive alternative for bone health. In this study, we prepared, formulated, and compared the effects of cell lysate and supernatant of five native probiotic strains (Lactobacillus acidophilus, Lactobacillus reuteri, Lactobacillus casei, Bifidobacterium longum, and Bacillus coagulans) in ovariectomized (OVX) rats. Methods The probiotic strains were isolated, and their cell-free supernatants and biomasses as postbiotics were extracted and formulated using standard microbial processes. The Sprague-Dawley rats were fed by 1 × 109 CFU/ml/day postbiotic preparations for 4 weeks immediately after ovariectomy. Dual-energy X-ray absorptiometry (DEXA) scans were accomplished to evaluate femur, spine, and tibia BMD. The serum biochemical markers [calcium, phosphorus, and alkaline phosphatase] were assessed. Results Postbiotics could considerably improve the global and femur area in OVX rats. In the case of global bone mineral density (BMD), Lactobacillus casei lysate and supernatant, Bacillus coagulans lysate and supernatant, lysate of Bifidobacterium longum and Lactobacillus acidophilus, and Lactobacillus reuteri supernatant significantly increased BMD. We found Bacillus coagulans supernatant meaningfully enriched tibia BMD. Conclusion Postbiotic could ameliorate bone loss resulting from estrogen deficiency. Also, the effects of postbiotics on different bone sites are strain-dependent. More clinical studies need to explore the optimal administrative dose and duration of the specific postbiotics in protecting bone loss.
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Affiliation(s)
- Nima Montazeri-Najafabady
- Endocrinology and Metabolism Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.,Biotechnology Research Center, Shiraz University of Medical Sciences, P.O. Box: 71348-14336, Shiraz, Iran
| | - Younes Ghasemi
- Pharmaceutical Science Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | | | - Yousef Ashoori
- Pharmaceutical Science Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Pedram Talezadeh
- Endocrinology and Metabolism Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Farhad Koohpeyma
- Endocrinology and Metabolism Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyedeh Narjes Abootalebi
- Division of Intensive Care Unit, Department of Pediatrics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ahmad Gholami
- Biotechnology Research Center, Shiraz University of Medical Sciences, P.O. Box: 71348-14336, Shiraz, Iran.
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Souza ATP, Freitas GP, Lopes HB, Totoli GGC, Tarone AG, Marostica-Junior MR, Rosa AL, Beloti MM. Jabuticaba peel extract modulates adipocyte and osteoblast differentiation of MSCs from healthy and osteoporotic rats. J Bone Miner Metab 2021; 39:163-173. [PMID: 32889573 DOI: 10.1007/s00774-020-01152-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 08/20/2020] [Indexed: 12/26/2022]
Abstract
INTRODUCTION The jabuticaba peel extract (JPE) contains bioactive compounds that regulate fat metabolism. Because the negative correlation between fat accumulation and bone formation in bone marrow, we hypothesized that JPE inhibits adipocyte as well as favors osteoblast differentiation of mesenchymal stromal cells (MSCs) under healthy and osteoporotic conditions, a disease that display an imbalance between adipocyte and osteoblast differentiation resulting in reduced bone mass. MATERIAL AND METHODS To test these hypotheses, bone marrow MSCs were harvested from healthy and osteoporotic rats and cultured in adipogenic and osteogenic media with three concentrations of JPE, 0.25, 5 and 10 µg/ml, and vehicle (control). After selecting the most efficient concentrations of JPE, we used them to evaluate adipocyte and osteoblast differentiation of MSCs from both sources. RESULTS We observed that, in general, JPE inhibited adipocyte differentiation of MSCs with more pronounced effects in cells from healthy than osteoporotic rats. In addition, JPE increased osteoblast differentiation, exhibiting a slightly higher osteogenic potential on MSCs from osteoporotic compared to healthy condition. CONCLUSION Our results demonstrated that JPE drives MSCs to inhibit adipocyte differentiation and toward osteoblast differentiation under healthy and osteoporotic conditions. These findings pave the way for further translational studies to investigate the therapeutic possibilities of JPE in both prevention and treatment of osteoporosis.
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Affiliation(s)
- Alann Thaffarell Portilho Souza
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Gileade Pereira Freitas
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Helena Bacha Lopes
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Gabriela Guaraldo Campos Totoli
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Adriana Gadioli Tarone
- School of Food Engineering, University of Campinas, Rua Monteiro Lobato 80, Campinas, 13083-862, SP, Brazil
| | | | - Adalberto Luiz Rosa
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Marcio Mateus Beloti
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café S/N, Ribeirão Preto, SP, 14040-904, Brazil.
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The relationship between orthopedic clinical imaging and bone strength prediction. MEDICINE IN NOVEL TECHNOLOGY AND DEVICES 2021. [DOI: 10.1016/j.medntd.2021.100060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Catalano A, Bellone F, Morabito N, Corica F. Sclerostin and Vascular Pathophysiology. Int J Mol Sci 2020; 21:ijms21134779. [PMID: 32640551 PMCID: PMC7370046 DOI: 10.3390/ijms21134779] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/26/2020] [Accepted: 07/03/2020] [Indexed: 12/12/2022] Open
Abstract
There is cumulating evidence for a contribution of Wnt signaling pathways in multiple processes involved in atherosclerosis and vascular aging. Wnt signaling plays a role in endothelial dysfunction, in the proliferation and migration of vascular smooth muscle cells (VSMCs) and intimal thickening. Moreover, it interferes with inflammation processes, monocyte adhesion and migration, as well as with foam cell formation and vascular calcification progression. Sclerostin is a negative regulator of the canonical Wnt signaling pathway and, accordingly, the consequence of increased sclerostin availability can be disruption of the Wnt signalling cascade. Sclerostin is becoming a marker for clinical and subclinical vascular diseases and several lines of evidence illustrate its role in the pathophysiology of the vascular system. Sclerostin levels increase with aging and persist higher in some diseases (e.g., diabetes, chronic kidney disease) that are known to precipitate atherosclerosis and enhance cardiovascular risk. Current knowledge on the association between sclerostin and vascular diseases is summarized in this review.
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Affiliation(s)
- Antonino Catalano
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (F.B.); (N.M.); (F.C.)
- A.O.U. Policlinico “G.Martino”, Via Consolare Valeria, 98125 Messina, Italy
- Correspondence: ; Tel.: +39-090-221-3946; Fax: +39-090-221-7176
| | - Federica Bellone
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (F.B.); (N.M.); (F.C.)
- A.O.U. Policlinico “G.Martino”, Via Consolare Valeria, 98125 Messina, Italy
| | - Nunziata Morabito
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (F.B.); (N.M.); (F.C.)
- A.O.U. Policlinico “G.Martino”, Via Consolare Valeria, 98125 Messina, Italy
| | - Francesco Corica
- Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy; (F.B.); (N.M.); (F.C.)
- A.O.U. Policlinico “G.Martino”, Via Consolare Valeria, 98125 Messina, Italy
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Colangelo L, Pepe J, Nieddu L, Sonato C, Scillitani A, Diacinti D, Angelozzi M, Cipriani C, Minisola S. Long-term bone mineral density changes after surgical cure of patients with tumor-induced osteomalacia. Osteoporos Int 2020; 31:1383-1387. [PMID: 32185436 DOI: 10.1007/s00198-020-05369-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 02/25/2020] [Indexed: 12/20/2022]
Abstract
UNLABELLED This paper reports our personal experience filling the gap regarding changes of bone mineral density after surgical treatment in patient suffering from tumor-induced osteomalacia. INTRODUCTION No systematic data are available regarding long-term bone mineral density (BMD) changes after surgical cure of patients with tumor-induced osteomalacia. METHODS From October 2001 through April 2018, we studied 10 consecutive patients (mean age ± SD, 45.5 ± 13.8 years; 5 males and 5 females) with tumor-induced osteomalacia. We evaluated BMD when initially presented at our Center and after surgical removal of the tumor. RESULTS Basal BMD and corresponding Z-score values (mean values ± SD) measured by DXA were as follows: L1-L4 = 0.692 ± 0.15 g/cm2, Z-score = - 2.80 ± 1.60; femur neck 0.447 ± 0.10 g/cm2, Z-score = - 2.66 ± 0.93; total femur = 0.450 ± 0.08 g/cm2, Z-score = -3.04 ± 0.85). Furthermore, Trabecular Bone Score (TBS) was evaluated in three patients (basal values, 0.990 ± 0.32). Seven patients were intermittently followed after surgical excision of the tumor while supplemented with cholecalciferol and calcium salts; the remaining three were lost to follow-up. There was a striking increase of BMD values that peaked at 26.7 ± 6.50 months: L1-L4 = 1.289 ± 0.247 g/cm2, p < 0.001, Z-score + 1.75 ± 1.42; femur neck = 0.890 ± 0.235 g/cm2, p = 0.028, Z-score = + 0.50 ± 1.40; total femur = 0.834 ± 0.150 g/cm2, p = 0.005, Z-score = - 0.74 ± 1.14. In patients with the greatest bone involvement at lumbar site, there was a striking increase of an average 1.5% (p < 0.01) in respect to baseline Z-score value for each additional month of observation during the first 2-3 years post-surgery. An improvement of trabecular microarchitecture was also documented (TBS, 1.255 ± 0.16). CONCLUSION This is the first case series documenting an impressive increase of BMD at both lumbar and femoral sites, together with an improvement of trabecular microarchitecture as documented by TBS. This is the consequence of huge mineralization of the large amount of osteoid tissue after resolution of the disease.
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Affiliation(s)
- L Colangelo
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, Rome, Italy.
| | - J Pepe
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, Rome, Italy
| | - L Nieddu
- Faculty of Economics, UNINT University, Via Cristoforo Colombo 200, 00147, Rome, Italy
| | - C Sonato
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, Rome, Italy
| | - A Scillitani
- Endocrinology Unit, "Casa Sollievo della Sofferenza", IRCCS, San Giovanni Rotondo, Foggia, Italy
| | - D Diacinti
- Department of Radiology, Sapienza University of Rome, Rome, Italy
| | - M Angelozzi
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, Rome, Italy
| | - C Cipriani
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, Rome, Italy
| | - S Minisola
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, Rome, Italy
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Chen W, Wasnik S, Fu Y, Aranda L, Rundle CH, Lau KHW, Baylink DJ, Zhang X. Unique anabolic action of stem cell gene therapy overexpressing PDGFB-DSS6 fusion protein in OVX osteoporosis mouse model. Bone Rep 2020; 12:100236. [PMID: 31886323 PMCID: PMC6920713 DOI: 10.1016/j.bonr.2019.100236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 12/18/2022] Open
Abstract
In the present study we sought to improve the efficacy and safety of our Sca1+ PDGFB stem cell gene therapy for osteoporosis in ovariectomized (OVX) mouse model. This therapy is administered by marrow transplantation. We established the promise of this approach by previously showing that this therapy in normal mice increase bone density, increased endosteal cortical and trabecular bone formation, caused de novo trabecular bone formation, increased cortical thickness and improve bone strength. In the current study we produced a fusion gene, PDGFB-DSS6. We reasoned that the DSS6, calcium binding protein would trap the PDGFB at the bone surface and thereby limit the amount of PDGFB required to produce an optimal bone formation response, i.e. efficacy with a lower engraftment. The result shows that indeed with a very low level of engraftment we achieved a large increase in bone formation in the OVX model of bone loss. Serum analysis for biochemical marker of new bone formation showed an approximate 75% increase in alkaline phosphatase levels in Sca1+PDGFB-DSS6 group as compared to other groups. Quantitative analysis of bone by microCT showed a massive increase in trabecular bone density and trabecular connectivity of the femur in the metaphysis in Sca1+ PDGFB-DSS6 group. The increased cortical porosity produced by OVX was replaced by the Sca1+ PDGFB-DSS6 therapy but not by the positive control Sca1+ PDGFB. Additionally, an increase in the femur bone strength was also observed specifically in Sca1+ PDGFB-DSS6 as compared to other treatment groups, emphasizing the functional significance of the observed anabolic action is on bone formation. In future work we will focus on nontoxic preconditioning of our marrow transplantation procedure and also on transcriptional control of therapeutic gene expression to avoid excess bone formation.
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Affiliation(s)
- Wanqiu Chen
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
| | - Samiksha Wasnik
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
| | - Yawen Fu
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
| | - Leslie Aranda
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
| | - Charles H. Rundle
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
- Musculoskeletal Disease Center, Jerry L. Pettis Memorial Veterans Affairs Medical Center, Loma Linda, CA, USA
| | - Kin-Hing William Lau
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
- Musculoskeletal Disease Center, Jerry L. Pettis Memorial Veterans Affairs Medical Center, Loma Linda, CA, USA
| | - David J. Baylink
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
| | - Xiaobing Zhang
- Department of Medicine, Division of Regenerative Medicine, Loma Linda University, Loma Linda, California, USA
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Sun Y, Chen R, Zhu D, Shen ZQ, Zhao HB, Lee WH. Osteoking improves OP rat by enhancing HSP90‑β expression. Int J Mol Med 2020; 45:1543-1553. [PMID: 32323753 PMCID: PMC7138285 DOI: 10.3892/ijmm.2020.4529] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 02/27/2020] [Indexed: 12/18/2022] Open
Abstract
Osteoporosis (OP) is a chronic bone disease that affects individuals worldwide. Osteoporosis is primarily asymptomatic, and patients with OP suffer from pain, inconvenience, economic pressure and osteoporotic fracture (OPF). Osteoking, a Traditional Chinese Medicine compound that originates from the Yi ethnic group, has been used for a number of years to treat fractures. In our previous study, osteoking exhibited therapeutic effects on rats with OPF by promoting calcium deposition. Based on bioinformatics and network pharmacology analyses of a component‑target‑disease database, heat shock protein HSP 90‑β (HSP90‑β), also known as HSP90‑β, was identified to be a key target of osteoking in OP. High HSP90‑β expression levels were observed in osteoporotic rats and rat bone mesenchymal stem cells (rBMSCs) following osteoking treatment. After 12 weeks of administration in vivo, there was increased bone mineral density (BMD) (P<0.05), increased bone alkaline phosphatase (P<0.05), and improved bone microstructure in the osteoking group compared with those of the negative control group. In vitro, increased calcium deposition in rBMSCs was observed after 4 weeks of osteoking treatment. These results suggest that the mechanisms of osteoking are closely associated with HSP90‑β and activate the bone morphogenetic protein (BMP) signalling pathway, primarily through BMP‑2. Osteoking treatment improves OP in rats by enhancing HSP90‑β expression.
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Affiliation(s)
- Yan Sun
- Pharmaceutical College and Key Laboratory of Pharmacology for Natural Products of Yunnan Province, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Ran Chen
- The Clinical Laboratory Department, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650000, P.R. China
| | - Di Zhu
- Pharmaceutical College and Key Laboratory of Pharmacology for Natural Products of Yunnan Province, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Zhi-Qiang Shen
- Pharmaceutical College and Key Laboratory of Pharmacology for Natural Products of Yunnan Province, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Hong-Bin Zhao
- The Emergency Department, The First People's Hospital of Yunnan Province/The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan 650032, P.R. China
| | - Wen-Hui Lee
- Key Laboratory of Bio‑active Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology, 650032, P.R. China
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11
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Chen X, Zhu X, Hu Y, Yuan W, Qiu X, Jiang T, Xia C, Xiong L, Li F, Gao Y. EDTA-Modified 17β-Estradiol-Laden Upconversion Nanocomposite for Bone-Targeted Hormone Replacement Therapy for Osteoporosis. Theranostics 2020; 10:3281-3292. [PMID: 32194868 PMCID: PMC7053193 DOI: 10.7150/thno.37599] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 01/14/2020] [Indexed: 01/10/2023] Open
Abstract
Hormone therapy (HT) is one of the most effective treatments for osteoporosis. However, the nonselective accumulation of hormone in organs such as breast, heart and uterus other than bones causes serious side effects, which impedes the application of HT. Hence, it is critically important to develop a HT strategy with reduced non-specific enrichment of hormone drugs in non-target tissues and enhanced bone-targeting ability. Methods: Herein, a 17β-estradiol (E2)-laden mesoporous silica-coated upconversion nanoparticle with a surface modification of ethylenediaminetetraacetic acid (EDTA) (NaLuF4:Yb,Tm@NaLuF4@mSiO2-EDTA-E2, E2-csUCNP@MSN-EDTA) is developed for bone-targeted osteoporosis hormone therapy. EDTA was attached onto the surface of E2 upconversion nanocomposite to enhance its affinity and efficiency targeting bone tissue and cells to optimize hormone replacement therapy for osteoporosis. We characterized the size, cytotoxicity, loading and release efficiency, in situ and ex vivo imaging. Further, in vitro and in vivo osteogenic ability was tested using preosteoblast and ovariectomy mouse model of osteoporosis. Results: The upconversion core of E2-csUCNP@MSN-EDTA nanoparticle serves as an excellent imaging agent for tracking the loaded hormone drug in vivo. The mesoporous silica layer has a high loading efficiency for E2 and provides a relatively long-lasting drug release within 50 h. EDTA anchored on the silica layer endows the nanocomposite with a bone targeting property. The nanocomposite effectively reverses estrogen deficiency-induced osteoporosis and reduces the damage of hormone to the uterus. The bone mineral density in the nanocomposite treatment group is nearly twice that of the ovariectomized (OVX) group. Compared with the E2 group, the uterine weight and luminal epithelial height were significantly lower in the nanocomposite treatment group. Conclusion: This work demonstrated that E2-csUCNP@MSN-EDTA alleviates the side effect of hormone therapy while maintaining its therapeutic efficacy, which has great potential for developing the next generation of methods for osteoporosis treatment.
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12
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Minisola S, Cipriani C, Grotta GD, Colangelo L, Occhiuto M, Biondi P, Sonato C, Vigna E, Cilli M, Pepe J. Update on the safety and efficacy of teriparatide in the treatment of osteoporosis. Ther Adv Musculoskelet Dis 2019; 11:1759720X19877994. [PMID: 31632472 PMCID: PMC6778993 DOI: 10.1177/1759720x19877994] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 08/29/2019] [Indexed: 12/14/2022] Open
Abstract
Following the completion of the Fracture Prevention Trial, teriparatide was approved by the United States Food and Drug Administration and the European Medicine Agency as the first therapeutic anabolic agent for the treatment of postmenopausal women with severe osteoporosis. It subsequently received additional approval for the treatment of osteoporosis in men, and for the treatment of osteoporosis associated with glucocorticoid therapy in men and women at risk of fracture. In this review, we summarize the most important data concerning PTH 1-34 therapy before 2016 in the treatment of osteoporosis, and report some outstanding results published in the last 2 years. New data on safety will also discussed, together with the state of art of nonclassical utilization. Finally, in view of the recent approval of biosimilars, possible future landscapes are discussed.
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Affiliation(s)
- Salvatore Minisola
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Viale del Policlinico, 155, Rome, 00161, Italy
| | - Cristiana Cipriani
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Giada Della Grotta
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Luciano Colangelo
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Marco Occhiuto
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Piergianni Biondi
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Chiara Sonato
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Evelina Vigna
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Mirella Cilli
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
| | - Jessica Pepe
- Department of Internal Medicine and Medical Disciplines, "Sapienza" Rome University, Rome, Italy
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13
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Galli C, Colangelo M, Pedrazzi G, Guizzardi S. The Response of Osteoblasts and Bone to Sinusoidal Electromagnetic Fields: Insights from the Literature. Calcif Tissue Int 2019; 105:127-147. [PMID: 30997574 DOI: 10.1007/s00223-019-00554-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 04/11/2019] [Indexed: 12/23/2022]
Abstract
Electromagnetic fields (EMFs) have been proposed as a tool to ameliorate bone formation and healing. Despite their promising results, however, they have failed to enter routine clinical protocols to treat bone conditions where higher bone mass has to be achieved. This is no doubt also due to a fundamental lack of knowledge and understanding on their effects and the optimal settings for attaining the desired therapeutic effects. This review analysed the available in vitro and in vivo studies that assessed the effects of sinusoidal EMFs (SEMFs) on bone and bone cells, comparing the results and investigating possible mechanisms of action by which SEMFs interact with tissues and cells. The effects of SEMFs on bone have not been as thoroughly investigated as pulsed EMFs; however, abundant evidence shows that SEMFs affect the proliferation and differentiation of osteoblastic cells, acting on multiple cellular mechanisms. SEMFs have also proven to increase bone mass in rodents under normal conditions and in osteoporotic animals.
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Affiliation(s)
- C Galli
- Department of Medicine and Surgery, University of Parma, Parma, Italy.
| | - M Colangelo
- Department of Medicine and Surgery, Histology and Embryology Lab, University of Parma, Parma, Italy
| | - G Pedrazzi
- Department of Medicine and Surgery, Neuroscience Unit, University of Parma, Via Volturno 39, 43126, Parma, Italy
| | - S Guizzardi
- Department of Medicine and Surgery, Histology and Embryology Lab, University of Parma, Parma, Italy
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14
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Colangelo L, Biamonte F, Pepe J, Cipriani C, Minisola S. Understanding and managing secondary osteoporosis. Expert Rev Endocrinol Metab 2019; 14:111-122. [PMID: 30735441 DOI: 10.1080/17446651.2019.1575727] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 01/22/2019] [Indexed: 02/08/2023]
Abstract
INTRODUCTION The term secondary osteoporosis (SO) identifies a reduction of bone mass related to a well-established disease or pharmacological agent. The identification of the underlying disease often represents a challenging situation in clinical practice. AREAS COVERED The prevalence of SO in the real world may vary, ranging from 17% to 80%; therefore, search for a form of SO represents a pillar when evaluating patients with osteoporosis. Guidelines for treatment of specific secondary forms of osteoporosis, such as glucocorticoid-induced osteoporosis, have been published even though often neglected in clinical practice. For the majority of SO, there are currently no specific guidelines concerning treatment with only few trials showing the effect of bone-active drugs on fracture risk reduction. EXPERT OPINION Healthcare professionals should be aware of the secondary forms of osteoporosis, in particular when the reason for reduced skeletal resistance is uncertain or when bone mineral density results are unsatisfactory in a patient compliant to therapy. In a few cases (such as, for example: no response to therapy, better classification of bone involvement in patients with kidney failure, suspicion of rare metabolic bone disease) bone biopsy is needed to investigate the patient. This review highlights recent advances in understanding and managing SO.
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Affiliation(s)
- Luciano Colangelo
- a Department of Internal Medicine and Medical Disciplines , "Sapienza" University of Rome , Rome , Italy
| | - Federica Biamonte
- a Department of Internal Medicine and Medical Disciplines , "Sapienza" University of Rome , Rome , Italy
| | - Jessica Pepe
- a Department of Internal Medicine and Medical Disciplines , "Sapienza" University of Rome , Rome , Italy
| | - Cristiana Cipriani
- a Department of Internal Medicine and Medical Disciplines , "Sapienza" University of Rome , Rome , Italy
| | - Salvatore Minisola
- a Department of Internal Medicine and Medical Disciplines , "Sapienza" University of Rome , Rome , Italy
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15
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Chen G, Xu Q, Dai M, Liu X. Bergapten suppresses RANKL-induced osteoclastogenesis and ovariectomy-induced osteoporosis via suppression of NF-κB and JNK signaling pathways. Biochem Biophys Res Commun 2019; 509:329-334. [DOI: 10.1016/j.bbrc.2018.12.112] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 12/15/2018] [Indexed: 12/26/2022]
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16
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Akkawi I, Zmerly H. Osteoporosis: Current Concepts. JOINTS 2018; 6:122-127. [PMID: 30051110 PMCID: PMC6059859 DOI: 10.1055/s-0038-1660790] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Accepted: 05/02/2018] [Indexed: 01/13/2023]
Abstract
Osteoporosis is a worldwide disease characterized by reduction of bone mass and alteration of bone architecture resulting in increased bone fragility and increased fracture risk. Causes of osteoporosis include increasing age, female sex, postmenopausal status, hypogonadism or premature ovarian failure, low body mass index, ethnic background, rheumatoid arthritis, low bone mineral density (BMD), vitamin D deficiency, low calcium intake, hyperkyphosis, current smoking, alcohol abuse, immobilization, and long-term use of certain medications. The diagnosis of osteoporosis is established by measurement of BMD of the hip and spine using dual energy X-ray absorptiometry. According to the World Health Organization criteria, osteoporosis is defined as a BMD that lies 2.5 standard deviation or more below the average value for young healthy women. Bone turnover biomarker detection may be useful in monitoring osteoporosis treatment and assessing fracture risk but not for diagnosis of osteoporosis. Management of osteoporosis consists of nonpharmacological interventions, which are recommended for all subjects, and pharmacological therapy in all postmenopausal women who have had an osteoporotic fracture or have BMD values consistent with osteoporosis.
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Affiliation(s)
- Ibrahim Akkawi
- Orthopaedics and Traumatology Unit, Villa Erbosa Hospital, Bologna, Italy
| | - Hassan Zmerly
- Orthopaedics and Traumatology Unit, Villa Erbosa Hospital, Bologna, Italy
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17
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Li L, Wang Y, Zhang N, Zhang Y, Lin J, Qiu X, Gui Y, Wang F, Li D, Wang L. Heterozygous deletion of LRP5 gene in mice alters profile of immune cells and modulates differentiation of osteoblasts. Biosci Trends 2018; 12:266-274. [PMID: 29899194 DOI: 10.5582/bst.2018.01013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Skeletal homeostasis is dynamically influenced by the immune system. Low density lipoprotein receptor-related protein-5 (LRP5) is a co-receptor of the Wnt signaling pathway, which modulates bone metabolism in humans and mice. Immune disorders can lead to abnormal bone metabolism. It is unclear whether and how LRP5 alters the balance of the immune system to modulate bone homeostasis. In this study, we used primary osteoblast to detect the differentiation of osteoblasts in vitro, the immune cells of spleen and bone marrow of 6-month old LRP5 heterozygote (HZ) and wild-type (WT) mice were analyzed by Flow cytometry. We found that LRP5+/- could influence the differentiation of osteoblasts by decreasing the mRNA level of Osterix, and increasing the mRNA level of Runx2 and the ratio of receptor activator for nuclear factor-κB ligand/osteoprotegerin (RANKL/OPG). In the LRP5+/- mice, percentages of NK cells, CD3e+ cells, and CD8a+ T cells were increased in both spleen and bone marrow, and percentages of CD106+ cells and CD11c+ cells were increased in spleen while decreased in bone marrow, conversely, CD62L+ cells were decreased in spleen while increased in bone marrow compared to the WT mice. Percentages of CD4+ cells, CD14+ cells, and CD254+ cells were increased in the spleen, and CTLA4+ cells were increased in the bone marrow of the LRP5+/- mice. The mRNA level of Wnt signaling molecules such as β-catenin, and c-myc were decreased and APC was increased in spleen lymphocytes and bone marrow lymphocytes, and the mRNA level of Wnt3a was decreased in spleen lymphocytes while no change in bone marrow lymphocytes was seen with silencing LRP5 by specific small interfering RNA. In conclusion, heterozygous deletion of the LRP5 gene in mice could alter the profile of the immune cells, influence the balance of immune environment, and modulate bone homeostasis, which might present a potential mechanism to explore the Wnt signaling pathway in the modulation of the immune system.
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Affiliation(s)
- Lisha Li
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases
| | - Yan Wang
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases
| | - Na Zhang
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases
| | - Yang Zhang
- First Affiliated Hospital of Heilongjiang University of Chinese Medicine
| | - Jing Lin
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases
| | - Xuemin Qiu
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases
| | - Yuyan Gui
- Obstetrics and Gynecology Hospital of Fudan University
| | - Feifei Wang
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases
| | - Dajin Li
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases
| | - Ling Wang
- Obstetrics and Gynecology Hospital of Fudan University.,The Academy of Integrative Medicine of Fudan University.,Shanghai Key Laboratory of Female Reproductive Endocrine-related Diseases.,Laboratory for Reproductive Immunology, Hospital & Institute of Obstetrics and Gynecology, IBS, Fudan University Shanghai Medical College
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18
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Abstract
Sarcoidosis is a systemic granulomatous lung disease of unknown origin affecting people of any age, mainly young adults. The disease is extremely heterogeneous with an unpredictable clinical course. Different phenotypes have been identified: an acute syndrome can be distinguished from subacute and chronic variants. About 20% of patients are chronically progressive and may develop lung fibrosis. Sarcoidosis usually involves the lungs and thoracic lymph nodes, although the skin, eyes, bones, liver, spleen, heart, upper respiratory tract and nervous system can also be affected. No reliable indicators of clinical outcome are available, and there is no single serological biomarker with demonstrated unequivocal diagnostic and prognostic value. Diagnosis requires histological confirmation although a presumptive diagnosis may be acceptable in special conditions. This review examines the diagnostic approach to sarcoidosis involving a multidisciplinary team of specialists in which the internist has the task of identifying all pulmonary and extrapulmonary localizations of the disease and of managing complications and comorbidities.
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Affiliation(s)
- Elena Bargagli
- Respiratory Medicine, Department of Clinical and Experimental Medicine, Department of Clinical and Experimental Biomedical Sciences, University Hospital Careggi (AOUC), Largo Brambilla 1, 50134, Florence, Italy.
| | - Antje Prasse
- Medizinische Hochschule Hannover, Abteilung für Pneumologie Carl-Neuberg-Straße 1, 30625, Hannover, Germany
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19
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Mesenchymal Stem Cells: Cell Fate Decision to Osteoblast or Adipocyte and Application in Osteoporosis Treatment. Int J Mol Sci 2018; 19:ijms19020360. [PMID: 29370110 PMCID: PMC5855582 DOI: 10.3390/ijms19020360] [Citation(s) in RCA: 224] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/13/2018] [Accepted: 01/22/2018] [Indexed: 12/11/2022] Open
Abstract
Osteoporosis is a progressive skeletal disease characterized by decreased bone mass and degraded bone microstructure, which leads to increased bone fragility and risks of bone fracture. Osteoporosis is generally age related and has become a major disease of the world. Uncovering the molecular mechanisms underlying osteoporosis and developing effective prevention and therapy methods has great significance for human health. Mesenchymal stem cells (MSCs) are multipotent cells capable of differentiating into osteoblasts, adipocytes, or chondrocytes, and have become the favorite source of cell-based therapy. Evidence shows that during osteoporosis, a shift of the cell differentiation of MSCs to adipocytes rather than osteoblasts partly contributes to osteoporosis. Thus, uncovering the molecular mechanisms of the osteoblast or adipocyte differentiation of MSCs will provide more understanding of MSCs and perhaps new methods of osteoporosis treatment. The MSCs have been applied to both preclinical and clinical studies in osteoporosis treatment. Here, we review the recent advances in understanding the molecular mechanisms regulating osteoblast differentiation and adipocyte differentiation of MSCs and highlight the therapeutic application studies of MSCs in osteoporosis treatment. This will provide researchers with new insights into the development and treatment of osteoporosis.
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20
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Xiong K, Wu T, Fan Q, Chen L, Yan M. Novel Reduced Graphene Oxide/Zinc Silicate/Calcium Silicate Electroconductive Biocomposite for Stimulating Osteoporotic Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2017; 9:44356-44368. [PMID: 29211449 DOI: 10.1021/acsami.7b16206] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In the absence of external assistance, autogenous healing of bone fracture is difficult due to impaired regeneration ability under osteoporosis pathological conditions. In this study, a reduced graphene oxide/zinc silicate/calcium silicate (RGO/ZS/CS) conductive biocomposite with an optimal surface electroconductivity of 5625 S/m was prepared by a two-step spin-coating method. The presence of lamellar apatite nanocrystals on the surfaces of the biocomposite suggests that it has good in vitro biomineralization ability. The silicon and zinc released from the biocomposite induced a significant increase in the osteogenesis of mouse bone mesenchymal stem cells (mBMSCs). Furthermore, alkaline phosphatase activities were further promoted when 3 μA direct current was applied to stimulate the mBMSCs that were cultured on the RGO/ZS/CS surface. However, electrical stimulation failed to further upregulate the osteogenesis-related gene expression. Moreover, RGO/ZS/CS extracts were found to suppress the receptor activator of nuclear factor-κB ligand-induced osteoclastic differentiation of mouse leukemic monocyte macrophages (RAW264.7 cells). Although the zinc ions in the RGO/ZS/CS extracts showed an inhibitory role in human umbilical vein endothelial cell (HUVEC) proliferation, dilutions of the RGO/ZS/CS extracts (1/16, 1/32, and 1/64) promoted HUVEC proliferation, and their angiogenesis-related gene expression was also upregulated. On the basis of the results of the in vitro angiogenesis model, more interconnected tubes formed when the above dilutions of RGO/ZS/CS extracts were added to ECMatrix. The new RGO/ZS/CS electroconductive biocomposite has potential to be used for stimulating osteoporotic bone regeneration.
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Affiliation(s)
- Kun Xiong
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
| | - Tingting Wu
- Department of Bone and Joint Surgery, Institute of Orthopedic Diseases, The First Affiliated Hospital, Jinan University , Guangzhou 510630, China
| | - Qingbo Fan
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
| | - Lin Chen
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
| | - Minhao Yan
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
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