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Zhang J, Hu W, Zou Z, Li Y, Kang F, Li J, Dong S. The role of lipid metabolism in osteoporosis: Clinical implication and cellular mechanism. Genes Dis 2024; 11:101122. [PMID: 38523674 PMCID: PMC10958717 DOI: 10.1016/j.gendis.2023.101122] [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: 05/21/2023] [Revised: 08/02/2023] [Accepted: 08/13/2023] [Indexed: 03/26/2024] Open
Abstract
In recent years, researchers have become focused on the relationship between lipids and bone metabolism balance. Moreover, many diseases related to lipid metabolism disorders, such as nonalcoholic fatty liver disease, atherosclerosis, obesity, and menopause, are associated with osteoporotic phenotypes. It has been clinically observed in humans that these lipid metabolism disorders promote changes in osteoporosis-related indicators bone mineral density and bone mass. Furthermore, similar osteoporotic phenotype changes were observed in high-fat and high-cholesterol-induced animal models. Abnormal lipid metabolism (such as increased oxidized lipids and elevated plasma cholesterol) affects bone microenvironment homeostasis via cross-organ communication, promoting differentiation of mesenchymal stem cells to adipocytes, and inhibiting commitment towards osteoblasts. Moreover, disturbances in lipid metabolism affect the bone metabolism balance by promoting the secretion of cytokines such as receptor activator of nuclear factor-kappa B ligand by osteoblasts and stimulating the differentiation of osteoclasts. Conclusively, this review addresses the possible link between lipid metabolism disorders and osteoporosis and elucidates the potential modulatory mechanisms and signaling pathways by which lipid metabolism affects bone metabolism balance. We also summarize the possible approaches and prospects of intervening lipid metabolism for osteoporosis treatment.
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Affiliation(s)
- Jing Zhang
- College of Bioengineering, Chongqing University, Chongqing 400044, China
- Department of Biomedical Materials Science, College of Biomedical Engineering, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Wenhui Hu
- Department of Biomedical Materials Science, College of Biomedical Engineering, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Zhi Zou
- College of Bioengineering, Chongqing University, Chongqing 400044, China
| | - Yuheng Li
- Department of Biomedical Materials Science, College of Biomedical Engineering, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Fei Kang
- Department of Biomedical Materials Science, College of Biomedical Engineering, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Jianmei Li
- Department of Biomedical Materials Science, College of Biomedical Engineering, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Shiwu Dong
- Department of Biomedical Materials Science, College of Biomedical Engineering, Army Medical University (Third Military Medical University), Chongqing 400038, China
- State Key Laboratory of Trauma and Chemical Poisoning, Army Medical University (Third Military Medical University), Chongqing 400038, China
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Wang X, Ge Q, Zeng Q, Zou K, Bao Z, Ying J, Wu Z, Jin H, Chen J, Xu T. Dnmt3b ablation affects fracture repair process by regulating apoptosis. BMC Musculoskelet Disord 2024; 25:180. [PMID: 38413962 PMCID: PMC10900613 DOI: 10.1186/s12891-024-07283-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Accepted: 02/14/2024] [Indexed: 02/29/2024] Open
Abstract
PURPOSE Previous studies have shown that DNA methyltransferase 3b (Dnmt3b) is the only Dnmt responsive to fracture repair and Dnmt3b ablation in Prx1-positive stem cells and chondrocyte cells both delayed fracture repair. Our study aims to explore the influence of Dnmt3b ablation in Gli1-positive stem cells in fracture healing mice and the underlying mechanism. METHODS We generated Gli1-CreERT2; Dnmt3bflox/flox (Dnmt3bGli1ER) mice to operated tibia fracture. Fracture callus tissues of Dnmt3bGli1ER mice and control mice were collected and analyzed by X-ray, micro-CT, biomechanical testing, histopathology and TUNEL assay. RESULTS The cartilaginous callus significantly decrease in ablation of Dnmt3b in Gli1-positive stem cells during fracture repair. The chondrogenic and osteogenic indicators (Sox9 and Runx2) in the fracture healing tissues in Dnmt3bGli1ER mice much less than control mice. Dnmt3bGli1ER mice led to delayed bone callus remodeling and decreased biomechanical properties of the newly formed bone during fracture repair. Both the expressions of Caspase-3 and Caspase-8 were upregulated in Dnmt3bGli1ER mice as well as the expressions of BCL-2. CONCLUSIONS Our study provides an evidence that Dnmt3b ablation Gli1-positive stem cells can affect fracture healing and lead to poor fracture healing by regulating apoptosis to decrease chondrocyte hypertrophic maturation.
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Affiliation(s)
- Xu Wang
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Qinwen Ge
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Qinghe Zeng
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Kaiao Zou
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Zhengsheng Bao
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The Second College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Jun Ying
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China
| | - Zhen Wu
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang Province, China
| | - Hongting Jin
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China.
| | - Jiali Chen
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China.
| | - Taotao Xu
- Institute of Orthopedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, Zhejiang Province, China.
- The First College of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China.
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Hou X, Zhang N, Guo L, Wang Y, Zheng M, Chen S, Liu P, Wang M, Li J, Wu S, Tian F. Cumulative exposure to remnant cholesterol and the risk of fragility fractures: a longitudinal cohort study. Front Endocrinol (Lausanne) 2023; 14:1251344. [PMID: 38089619 PMCID: PMC10713996 DOI: 10.3389/fendo.2023.1251344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 10/30/2023] [Indexed: 12/18/2023] Open
Abstract
Objective To investigate the association between cumulative remnant cholesterol (cumRC) and the risk of new-onset fragility fractures. Methods This study included individuals who participated in the 2006, 2008, and 2010 Kailuan health examinations. Baseline characteristics were compared between groups according to cumRC quartiles. The incidence density was calculated, and the log-rank test was used to compare the cumulative incidence. Cox proportional hazards models were used to estimate the hazard ratio (HR) and 95% confidence interval (CI), and restricted cubic spline was used to examine the possibly non-linear relation between cumRC and the risk of fragility fractures. Additional analyses were performed with stratification by age (≥ or <65 years). Results A total of 43,839 individuals were included in this study. During the median follow-up period of 10.97 years, a total of 489 fragility fractures occurred. Multivariable Cox proportional hazards regression model 3 showed that the Q1 and Q4 groups versus the Q2 group were associated with a higher HR of fragility fracture (HR 1.61, 95% CI: 1.23-2.11; HR 1.38, 95% CI: 1.06-1.81), and restricted cubic spline regression analysis showed a non-linear relationship between cumRC level and the risk of fragility fractures (P Overall association < 0.001, P Non-linear association = 0.001). The association was significant in the age group <65 years but not in the age group ≥65 years. The sensitivity analyses were consistent with the main results. Conclusions Both too high and too low cumRC levels were associated with a greater risk of fragility fractures, and this association was more significant in young and middle-aged people.
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Affiliation(s)
- Xiaoli Hou
- School of Public Health, North China University of Science and Technology, Tangshan, China
| | - Nan Zhang
- Orthopedics Department, Kailuan General Hospital, Tangshan, China
| | - Lu Guo
- School of Public Health, North China University of Science and Technology, Tangshan, China
| | - Yongheng Wang
- School of Public Health, North China University of Science and Technology, Tangshan, China
| | - Mengyi Zheng
- Cardiology Department, Capital Medical University, Beijing, China
| | - Shuohua Chen
- Cardiology Department, Kailuan General Hospital, Tangshan, China
| | - Peipei Liu
- School of Public Health, North China University of Science and Technology, Tangshan, China
| | - Mengqin Wang
- Emergency Department, Jishuitan, The Fourth Clinical Hospital of Peking University, Beijing, China
| | - Jia Li
- Jitang College, North China University of Science and Technology, Tangshan, China
| | - Shouling Wu
- Cardiology Department, Kailuan General Hospital, Tangshan, China
| | - Faming Tian
- School of Public Health, North China University of Science and Technology, Tangshan, China
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Zhang P, He J, Gan Y, Shang Q, Chen H, Zhao W, Shen G, Jiang X, Ren H. Plastrum testudinis Ameliorates Oxidative Stress in Nucleus Pulposus Cells via Downregulating the TNF-α Signaling Pathway. Pharmaceuticals (Basel) 2023; 16:1482. [PMID: 37895953 PMCID: PMC10610230 DOI: 10.3390/ph16101482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/05/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
BackgroundPlastrum testudinis (PT), a widely used traditional Chinese medicine, exerts protective effects against bone diseases such as intervertebral disc degeneration (IDD). Despite its effectiveness, the molecular mechanisms underlying the effects of PT on IDD remain unclear. Methods In this study, we used a comprehensive strategy combining bioinformatic analysis with experimental verification to investigate the possible molecular mechanisms of PT against IDD. We retrieved targets for PT and IDD, and then used their overlapped targets for protein-protein interaction (PPI) analysis. In addition, we used Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses to investigate the anti-IDD mechanisms of PT. Moreover, in vivo and in vitro experiment validations including hematoxylin-eosin (HE) and safranine O-green staining, senescence-associated β-galactosidase (SA-β-gal) assay, cell immunofluorescence staining, intracellular ROS measurement and Western blot analysis were performed to verify bioinformatics findings. Results We identified 342 and 872 PT- and IDD-related targets (32 overlapping targets). GO enrichment analysis yielded 450 terms related to oxidative stress and inflammatory response regulation. KEGG analysis identified 48 signaling pathways, 10 of which were significant; the TNF-α signaling pathway had the highest p-value, and prostaglandin G/H synthase 2 (PTGS2), endothelin-1 (EDN1), TNF-α, JUN and FOS were enriched in this pathway. Histopathological results and safranin O/green staining demonstrated that PT attenuated IDD, and SA-β-gal assay showed that PT ameliorated nucleus pulposus cell (NPC) senescence. An ROS probe was adopted to confirm the protective effect of PT against oxidative stress. Western blot analyses confirmed that PT downregulated the protein expression of PTGS2, EDN1, TNF-α, JUN and FOS in the TNF-α signaling pathway as well as cellular senescence marker p16, proinflammatory cytokine interleukin-6 (IL6), while PT upregulated the expression of NPC-specific markers including COL2A1 and ACAN in a concentration-dependent manner. Conclusions To the best of our knowledge, this study is the first to report that PT alleviates IDD by downregulating the protein expression of PTGS2, EDN1, TNF-α, JUN and FOS in the TNF-α signaling pathway and upregulating that of COL2A1 and ACAN, thus suppressing inflammatory responses and oxidative stress in NPCs.
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Affiliation(s)
- Peng Zhang
- Guangzhou University of Chinese Medicine, Guangzhou 510405, China; (P.Z.); (Y.G.); (Q.S.); (H.C.)
| | - Jiahui He
- The Affiliated TCM Hospital of Guangzhou Medical University, Guangzhou 510130, China;
| | - Yanchi Gan
- Guangzhou University of Chinese Medicine, Guangzhou 510405, China; (P.Z.); (Y.G.); (Q.S.); (H.C.)
| | - Qi Shang
- Guangzhou University of Chinese Medicine, Guangzhou 510405, China; (P.Z.); (Y.G.); (Q.S.); (H.C.)
| | - Honglin Chen
- Guangzhou University of Chinese Medicine, Guangzhou 510405, China; (P.Z.); (Y.G.); (Q.S.); (H.C.)
| | - Wenhua Zhao
- Department of Spinal Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China; (W.Z.); (G.S.)
| | - Gengyang Shen
- Department of Spinal Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China; (W.Z.); (G.S.)
| | - Xiaobing Jiang
- Department of Spinal Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China; (W.Z.); (G.S.)
| | - Hui Ren
- Department of Spinal Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China; (W.Z.); (G.S.)
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Morsczeck C, De Pellegrin M, Reck A, Reichert TE. Evaluation of Current Studies to Elucidate Processes in Dental Follicle Cells Driving Osteogenic Differentiation. Biomedicines 2023; 11:2787. [PMID: 37893160 PMCID: PMC10604663 DOI: 10.3390/biomedicines11102787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
When research on osteogenic differentiation in dental follicle cells (DFCs) began, projects focused on bone morphogenetic protein (BMP) signaling. The BMP pathway induces the transcription factor DLX3, whichh in turn induces the BMP signaling pathway via a positive feedback mechanism. However, this BMP2/DLX3 signaling pathway only seems to support the early phase of osteogenic differentiation, since simultaneous induction of BMP2 or DLX3 does not further promote differentiation. Recent data showed that inhibition of classical protein kinase C (PKCs) supports the mineralization of DFCs and that osteogenic differentiation is sensitive to changes in signaling pathways, such as protein kinase B (PKB), also known as AKT. Small changes in the lipidome seem to confirm the participation of AKT and PKC in osteogenic differentiation. In addition, metabolic processes, such as fatty acid biosynthesis, oxidative phosphorylation, or glycolysis, are essential for the osteogenic differentiation of DFCs. This review article attempts not only to bring the various factors into a coherent picture of osteogenic differentiation in DFCs, but also to relate them to recent developments in other types of osteogenic progenitor cells.
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Affiliation(s)
- Christian Morsczeck
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany (A.R.); (T.E.R.)
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Bao C, Wu T, Zhu S, Wang X, Zhang Y, Wang X, Yang L, He C. Regulation of cholesterol homeostasis in osteoporosis mechanisms and therapeutics. Clin Sci (Lond) 2023; 137:1131-1143. [PMID: 37553962 DOI: 10.1042/cs20220752] [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: 11/04/2022] [Revised: 06/27/2023] [Accepted: 07/03/2023] [Indexed: 08/10/2023]
Abstract
Osteoporosis is a metabolic bone disease that affects hundreds of millions of people worldwide and is characterized by excessive loss of bone protein and mineral content. The incidence and mortality of osteoporosis increase with age, creating a significant medical and economic burden globally. The importance of cholesterol levels has been reported in the development of diseases including osteoporosis. It is important to note that key enzymes and molecules involved in cholesterol homeostasis are closely related to bone formation. Excessive cholesterol may cause osteoporosis, cholesterol and its metabolites affect bone homeostasis by regulating the proliferation and stimulation of osteoblasts and osteoclasts. Therefore, antagonism of elevated cholesterol levels may be a potential strategy to prevent osteoporosis. There is sufficient evidence to support the use of bisphosphonates and statin drugs for osteoporosis in the clinic. Therefore, in view of the aggravation of the aging problem, we summarize the intracellular mechanism of cholesterol homeostasis and its relationship with osteoporosis (including cholesterol and cholesterol oxidation products (COPs) in osteoporosis). Furthermore, the current clinical cholesterol-lowering drugs for osteoporosis were also summarized, as are new and promising therapies (cell-based therapies (e.g., stem cells) and biomaterial-delivered target drug therapies for osteoporosis as well).
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Affiliation(s)
- Chuncha Bao
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Tao Wu
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Siyi Zhu
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Xiaoyi Wang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Yujia Zhang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Xiangxiu Wang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Lin Yang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Chengqi He
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
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Akhmetshina A, Kratky D, Rendina-Ruedy E. Influence of Cholesterol on the Regulation of Osteoblast Function. Metabolites 2023; 13:metabo13040578. [PMID: 37110236 PMCID: PMC10143138 DOI: 10.3390/metabo13040578] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/11/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
Bone is a dynamic tissue composed of cells, an extracellular matrix, and mineralized portion. Osteoblasts are responsible for proper bone formation and remodeling, and function. These processes are endergonic and require cellular energy in the form of adenosine triphosphate (ATP), which is derived from various sources such as glucose, fatty acids, and amino acids. However, other lipids such as cholesterol have also been found to play a critical role in bone homeostasis and can also contribute to the overall bioenergetic capacity of osteoblasts. In addition, several epidemiological studies have found a link between elevated cholesterol, cardiovascular disease, an enhanced risk of osteoporosis, and increased bone metastasis in cancer patients. This review focuses on how cholesterol, its derivatives, and cholesterol-lowering medications (statins) regulate osteoblast function and bone formation. It also highlights the molecular mechanisms underlying the cholesterol-osteoblast crosstalk.
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Affiliation(s)
- Alena Akhmetshina
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria
- Department of Medicine, Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Dagmar Kratky
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Elizabeth Rendina-Ruedy
- Department of Medicine, Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37235, USA
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Niu J, Wang Y, Meng Y, Qi W, Wen J. Asperosaponin VI induces osteogenic differentiation of human umbilical cord mesenchymal stem cells via the estrogen signaling pathway. Medicine (Baltimore) 2022; 101:e32344. [PMID: 36550906 PMCID: PMC9771310 DOI: 10.1097/md.0000000000032344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Asperosaponin VI (ASA VI) is an active ingredient found in the traditional Chinese herb Radix Dipsaci, which is used to treat fractures. ASA VI combined with osteogenic medium can induce osteogenic differentiation of rat-derived stem cells. However, whether ASA VI alone can induce osteoblast differentiation of human mesenchymal stem cells (MSCs) remains unclear. METHODS ASA VI human-derived binding proteins were searched in the PharmMapper database, osteogenesis-related signaling pathways were obtained through a literature search, and proteins contained in these signaling pathways were queried in the Kyoto Encyclopedia of Genes and Genomes database. SystemsDock was used to perform online molecular docking of target proteins to evaluate their binding abilities, and validation experiments were performed. RESULTS A total of 620 ASA VI target proteins and 12 osteogenesis-related signaling pathways were queried, and 17 intersecting targets were screened. Molecular docking results showed that these targets had high binding affinity for ASA VI. We selected estrogen receptor 2 and its estrogen signaling pathway for experimental validation. The results showed that ASA VI can induce the osteogenic differentiation of MSCs through the estrogen signaling pathway. CONCLUSION ASA VI can independently induce osteogenic differentiation of human umbilical cord MSCs, and the estrogen signaling pathway plays an important role in this process. Thus, ASA VI may have potential as an anti-osteoporosis drug.
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Affiliation(s)
- Junting Niu
- Department of Medical Genetics, School of Basic Medicine, Jilin University, Changchun, China
| | - Yiqing Wang
- Department of Medical Genetics, School of Basic Medicine, Jilin University, Changchun, China
| | - Yao Meng
- Department of Medical Genetics, School of Basic Medicine, Jilin University, Changchun, China
| | - Wanli Qi
- Department of Osteosci, The Affiliated Hospital of Changchun University of Chinese Medicine, Changchun, China
- * Correspondence: Wanli Qi, Department of Osteosci, The Affiliated Hospital of Changchun University of Chinese Medicine, Changchun 130021, China (e-mail: )
| | - Jianping Wen
- Department of Medical Genetics, School of Basic Medicine, Jilin University, Changchun, China
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Feng L, Pérez-Sánchez H, Bai Q. Studying noncovalent or covalent bond problem between smoothened and cholesterol by molecular dynamics simulation and Markov state model. Phys Chem Chem Phys 2022; 24:19564-19575. [PMID: 35942902 DOI: 10.1039/d2cp01453j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Smoothened (SMO) is an attractive therapeutic target for the treatment and prevention of several malignant tumors of the nervous system. The crystal structure of SMO shows cholesterol interacts with residue Asp95 via the noncovalent bond. However, some studies indicate that cholesterol covalently binds to residue Asp95 of SMO. To study these contradictory results, we performed molecular dynamics (MD) simulations and Markov state model (MSM) on SMO in complex with noncovalent-bound and covalent-bound cholesterol. The MD simulated results showed that the noncovalent-bound cholesterol was extremely unstable around the position of residue Asp95 of SMO, while the covalent-bound cholesterol could keep the stable connection with residue Asp95 of SMO. The free energy landscape showed that noncovalent-bound cholesterol had more deep energy wells than covalent-bound cholesterol when it dynamically interacted with the extracellular domain of SMO crystal structure. The MSM results showed the noncovalent-bound cholesterol had more dynamic configuration transformation pathways than the covalent-bound cholesterol. These results theoretically revealed cholesterol should have a covalent bond with residue Asp95 if cholesterol could be stable in the near position of residue Asp95 of SMO. Our studies not only elucidate the covalent binding contradictory issue between cholesterol and residue Asp95 of SMO, but also supply helpful information for antagonists design of SMO.
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Affiliation(s)
- Liya Feng
- Key Lab of Preclinical Study for New Drugs of Gansu Province, Institute of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, Gansu, P. R. China
| | - Horacio Pérez-Sánchez
- Structural Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, UCAM Universidad Católica de Murcia, Murcia, Spain.
| | - Qifeng Bai
- Key Lab of Preclinical Study for New Drugs of Gansu Province, Institute of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, Gansu, P. R. China
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Endo- and Exometabolome Crosstalk in Mesenchymal Stem Cells Undergoing Osteogenic Differentiation. Cells 2022; 11:cells11081257. [PMID: 35455937 PMCID: PMC9024772 DOI: 10.3390/cells11081257] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/03/2022] [Accepted: 04/05/2022] [Indexed: 02/04/2023] Open
Abstract
This paper describes, for the first time to our knowledge, a lipidome and exometabolome characterization of osteogenic differentiation for human adipose tissue stem cells (hAMSCs) using nuclear magnetic resonance (NMR) spectroscopy. The holistic nature of NMR enabled the time-course evolution of cholesterol, mono- and polyunsaturated fatty acids (including ω-6 and ω-3 fatty acids), several phospholipids (phosphatidylcholine, phosphatidylethanolamine, sphingomyelins, and plasmalogens), and mono- and triglycerides to be followed. Lipid changes occurred almost exclusively between days 1 and 7, followed by a tendency for lipidome stabilization after day 7. On average, phospholipids and longer and more unsaturated fatty acids increased up to day 7, probably related to plasma membrane fluidity. Articulation of lipidome changes with previously reported polar endometabolome profiling and with exometabolome changes reported here in the same cells, enabled important correlations to be established during hAMSC osteogenic differentiation. Our results supported hypotheses related to the dynamics of membrane remodelling, anti-oxidative mechanisms, protein synthesis, and energy metabolism. Importantly, the observation of specific up-taken or excreted metabolites paves the way for the identification of potential osteoinductive metabolites useful for optimized osteogenic protocols.
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Lu K, Shi TS, Shen SY, Shi Y, Gao HL, Wu J, Lu X, Gao X, Ju HX, Wang W, Cao Y, Chen D, Li CJ, Xue B, Jiang Q. Defects in a liver-bone axis contribute to hepatic osteodystrophy disease progression. Cell Metab 2022; 34:441-457.e7. [PMID: 35235775 DOI: 10.1016/j.cmet.2022.02.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 11/26/2021] [Accepted: 02/08/2022] [Indexed: 12/12/2022]
Abstract
Hepatic osteodystrophy (HOD) is a metabolic bone disease that is often associated with chronic liver disease and is marked by bone loss. Here, we demonstrate that hepatic expression of the phosphatase PP2Acα is upregulated during HOD, leading to the downregulation of expression of the hepatokine lecithin-cholesterol acyltransferase (LCAT). Loss of LCAT function markedly exacerbates the bone loss phenotype of HOD in mice. In addition, we found that alterations in cholesterol levels are involved in the regulation of osteoblast and osteoclast activities. We also found that LCAT improves liver function and relieves liver fibrosis in the mouse HOD model by promoting reversal of cholesterol transport from the bone to the liver. In summary, defects in a liver-bone axis occur during HOD that can be targeted to ameliorate disease progression.
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Affiliation(s)
- Ke Lu
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing 210008, China; Branch of National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, 321 Zhongshan Road, Nanjing 210008, China; Faculty of Pharmaceutical Sciences, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Tian-Shu Shi
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing 210008, China; Branch of National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, 321 Zhongshan Road, Nanjing 210008, China
| | - Si-Yu Shen
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing 210008, China; Branch of National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, 321 Zhongshan Road, Nanjing 210008, China
| | - Yong Shi
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing 210008, China; Branch of National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, 321 Zhongshan Road, Nanjing 210008, China
| | - Hong-Liang Gao
- Core Laboratory, Sir Run Run Hospital, Nanjing Medical University, Nanjing 211166, China
| | - Jing Wu
- Core Laboratory, Sir Run Run Hospital, Nanjing Medical University, Nanjing 211166, China
| | - Xiang Lu
- Core Laboratory, Sir Run Run Hospital, Nanjing Medical University, Nanjing 211166, China
| | - Xiang Gao
- Model Animal Research Center of Nanjing University, Xuefu Road, Nanjing 210032, China
| | - Huang-Xian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China
| | - Wei Wang
- National Laboratory of Solid-State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China
| | - Yi Cao
- National Laboratory of Solid-State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China
| | - Di Chen
- Faculty of Pharmaceutical Sciences, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Chao-Jun Li
- Ministry of Education Key Laboratory of Model Animal for Disease Study, Model Animal Research Center of the Medical School, Nanjing University, Nanjing 210093, China; State Key Laboratory of Reproductive Medicine and China International Joint Research Center on Environment and Human Health, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China.
| | - Bin Xue
- Core Laboratory, Sir Run Run Hospital, Nanjing Medical University, Nanjing 211166, China.
| | - Qing Jiang
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing 210008, China; Branch of National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, 321 Zhongshan Road, Nanjing 210008, China.
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12
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New Function of Cholesterol Oxidation Products Involved in Osteoporosis Pathogenesis. Int J Mol Sci 2022; 23:ijms23042020. [PMID: 35216140 PMCID: PMC8876989 DOI: 10.3390/ijms23042020] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/05/2022] [Accepted: 02/09/2022] [Indexed: 12/13/2022] Open
Abstract
Osteoporosis (OP) is a systemic bone disease characterized by decreased bone strength, microarchitectural changes in bone tissues, and increased risk of fracture. Its occurrence is closely related to various factors such as aging, genetic factors, living habits, and nutritional deficiencies as well as the disturbance of bone homeostasis. The dysregulation of bone metabolism is regarded as one of the key influencing factors causing OP. Cholesterol oxidation products (COPs) are important compounds in the maintenance of bone metabolic homeostasis by participating in several important biological processes such as the differentiation of mesenchymal stem cells, bone formation in osteoblasts, and bone resorption in osteoclasts. The effects of specific COPs on mesenchymal stem cells are mainly manifested by promoting osteoblast genesis and inhibiting adipocyte genesis. This review aims to elucidate the biological roles of COPs in OP development, starting from the molecular mechanisms of OP, pointing out opportunities and challenges in current research, and providing new ideas and perspectives for further studies of OP pathogenesis.
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13
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Wang B, Wang H, Li Y, Song L. Lipid metabolism within the bone micro-environment is closely associated with bone metabolism in physiological and pathophysiological stages. Lipids Health Dis 2022; 21:5. [PMID: 34996476 PMCID: PMC8742318 DOI: 10.1186/s12944-021-01615-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/15/2021] [Indexed: 12/12/2022] Open
Abstract
Recent advances in society have resulted in the emergence of both hyperlipidemia and obesity as life-threatening conditions in people with implications for various types of diseases, such as cardiovascular diseases and cancer. This is further complicated by a global rise in the aging population, especially menopausal women, who mostly suffer from overweight and bone loss simultaneously. Interestingly, clinical observations in these women suggest that osteoarthritis may be linked to a higher body mass index (BMI), which has led many to believe that there may be some degree of bone dysfunction associated with conditions such as obesity. It is also common practice in many outpatient settings to encourage patients to control their BMI and lose weight in an attempt to mitigate mechanical stress and thus reduce bone pain and joint dysfunction. Together, studies show that bone is not only a mechanical organ but also a critical component of metabolism, and various endocrine functions, such as calcium metabolism. Numerous studies have demonstrated a relationship between metabolic dysfunction in bone and abnormal lipid metabolism. Previous studies have also regarded obesity as a metabolic disorder. However, the relationship between lipid metabolism and bone metabolism has not been fully elucidated. In this narrative review, the data describing the close relationship between bone and lipid metabolism was summarized and the impact on both the normal physiology and pathophysiology of these tissues was discussed at both the molecular and cellular levels.
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Affiliation(s)
- Bo Wang
- Department of Orthopedics, The first affiliated Hospital of Army Medical University, Army Medical University, Gaotanyan Street No. 30, Chongqing, 400038, China
| | - Heng Wang
- Department of Orthopedics, The first affiliated Hospital of Army Medical University, Army Medical University, Gaotanyan Street No. 30, Chongqing, 400038, China
- Battalion of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Yuancheng Li
- Battalion of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Lei Song
- Department of Orthopedics, The first affiliated Hospital of Army Medical University, Army Medical University, Gaotanyan Street No. 30, Chongqing, 400038, China.
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14
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Song Y, Liu J, Zhao K, Gao L, Zhao J. Cholesterol-induced toxicity: An integrated view of the role of cholesterol in multiple diseases. Cell Metab 2021; 33:1911-1925. [PMID: 34562355 DOI: 10.1016/j.cmet.2021.09.001] [Citation(s) in RCA: 96] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/16/2021] [Accepted: 09/07/2021] [Indexed: 12/23/2022]
Abstract
High levels of cholesterol are generally considered to be associated with atherosclerosis. In the past two decades, however, a number of studies have shown that excess cholesterol accumulation in various tissues and organs plays a critical role in the pathogenesis of multiple diseases. Here, we summarize the effects of excess cholesterol on disease pathogenesis, including liver diseases, diabetes, chronic kidney disease, Alzheimer's disease, osteoporosis, osteoarthritis, pituitary-thyroid axis dysfunction, immune disorders, and COVID-19, while proposing that excess cholesterol-induced toxicity is ubiquitous. We believe this concept will help broaden the appreciation of the toxic effect of excess cholesterol, and thus potentially expand the therapeutic use of cholesterol-lowering medications.
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Affiliation(s)
- Yongfeng Song
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China; Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong 250021, China; Shandong Institute of Endocrine & Metabolic Disease, Jinan, Shandong 250062, China
| | - Junjun Liu
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China; Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong 250021, China; Shandong Institute of Endocrine & Metabolic Disease, Jinan, Shandong 250062, China
| | - Ke Zhao
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China; Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong 250021, China; Shandong Institute of Endocrine & Metabolic Disease, Jinan, Shandong 250062, China
| | - Ling Gao
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China; Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong 250021, China; Shandong Institute of Endocrine & Metabolic Disease, Jinan, Shandong 250062, China
| | - Jiajun Zhao
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China; Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong 250021, China; Shandong Institute of Endocrine & Metabolic Disease, Jinan, Shandong 250062, China.
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15
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Li Z, Li JN, Li Q, Liu C, Zhou LH, Zhang Q, Xu Y. miR-25-5p regulates endothelial progenitor cell differentiation in response to shear stress through targeting ABCA1. Cell Biol Int 2021; 45:1876-1886. [PMID: 33945659 DOI: 10.1002/cbin.11621] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 04/07/2021] [Accepted: 05/01/2021] [Indexed: 11/10/2022]
Abstract
The importance of flow shear stress (SS) on the differentiation of endothelial progenitor cells (EPCs) has been demonstrated in various studies. Cholesterol retention and microRNA regulation have been also proposed as relevant factors involved in this process, though evidence regarding their regulatory roles in the differentiation of EPCs is currently lacking. In the present study on high shear stress (HSS)-induced differentiation of EPCs, we investigated the importance of ATP-binding cassette transporter 1 (ABCA1), an important regulator in cholesterol efflux, and miR-25-5p, a potential regulator of endothelial reconstruction. We first revealed an inverse correlation between miR-25-5p and ABCA1 expression levels in EPCs under HSS treatment; their direct interaction was subsequently validated by a dual-luciferase reporter assay. Further studies using flow cytometry and quantitative polymerase chain reaction demonstrated that both miR-25-5p overexpression and ABCA1 inhibition led to elevated levels of specific markers of endothelial cells, with concomitant downregulation of smooth muscle cell markers. Finally, knockdown of ABCA1 in EPCs significantly promoted tube formation, which confirmed our conjecture. Our current results suggest that miR-25-5p might regulate the differentiation of EPCs partially through targeting ABCA1, and such a mechanism might account for HSS-induced differentiation of EPCs.
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Affiliation(s)
- Zhe Li
- Department of Cerebrovascular Diseases, Blue Cross Brain Hospital affiliated to Tongji University, Shanghai, China
| | - Jia-Nan Li
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Qiang Li
- Department of Neurosurgery, Changhai Hospital of Shanghai affiliated to Naval Military Medical University, Shanghai, China
| | - Chun Liu
- Department of Cerebrovascular Diseases, Blue Cross Brain Hospital affiliated to Tongji University, Shanghai, China
| | - Lin-Hua Zhou
- Department of Cerebrovascular Diseases, Blue Cross Brain Hospital affiliated to Tongji University, Shanghai, China
| | - Qi Zhang
- Department of Cerebrovascular Diseases, Blue Cross Brain Hospital affiliated to Tongji University, Shanghai, China
| | - Yi Xu
- Department of Neurosurgery, Changhai Hospital of Shanghai affiliated to Naval Military Medical University, Shanghai, China
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Zolfaroli I, Ortiz E, García-Pérez MÁ, Hidalgo-Mora JJ, Tarín JJ, Cano A. Positive association of high-density lipoprotein cholesterol with lumbar and femoral neck bone mineral density in postmenopausal women. Maturitas 2021; 147:41-46. [PMID: 33832646 DOI: 10.1016/j.maturitas.2021.03.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/08/2021] [Accepted: 03/02/2021] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Experimental studies suggest that lipids affect bone metabolism. We aimed to elucidate whether lipid levels are associated with bone mineral density (BMD) in a cohort of postmenopausal women. DESIGN A cross-sectional study of participants in the Chronic Ailment Reduction after MENopause (CARMEN) cohort. Women underwent assessment of clinical and analytical parameters, including fasting lipid levels. BMD was assessed at both lumbar spine and hip. Homogeneity in the cohort was optimized by filtering out a series of confounding variables with a known impact on bone. MAIN OUTCOME MEASURES Association of BMD at lumbar spine and femoral neck with lipid levels. RESULTS A total of 667 of the 1304 screened women were analyzed. A strong correlation was revealed between total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) in univariate analysis. Multivariate analysis detected a significant positive association of HDL-C with BMD at both spine (p = 0.007) and femoral neck (p = 0.013). Other independent predictors of spine BMD were years since menopause (ysm, negatively associated), and body mass index (BMI) and estradiol, both positively associated with BMD. The other independent variables in the femoral neck were ysm and glucose (negatively associated) and BMI, estradiol, and phosphate, all positively associated with BMD. CONCLUSION Levels of HDL-C, but not TC, LDL-C or triglycerides, were positively associated with BMD at both the lumbar spine and femoral neck in a homogeneous cohort of postmenopausal women.
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Affiliation(s)
- Irene Zolfaroli
- Service of Obstetrics and Gynecology, Hospital Clínico-INCLIVA, Av Blasco Ibáñez 17, 46010, Valencia, Spain.
| | - Ester Ortiz
- Service of Obstetrics and Gynecology, Hospital Universitario Dr Peset, Av Gaspar Aguilar 90, 46017, Valencia, Spain.
| | - Miguel-Ángel García-Pérez
- Department of Genetics, Faculty of Biological Sciences, University of Valencia, Burjassot, and INCLIVA, Burjassot, 46100, Valencia, Spain.
| | - Juan José Hidalgo-Mora
- Service of Obstetrics and Gynecology, Hospital Clínico-INCLIVA, Av Blasco Ibáñez 17, 46010, Valencia, Spain.
| | - Juan J Tarín
- Department of Cellular Biology, Functional Biology and Physical Anthropology, Faculty of Biological Sciences, University of Valencia, Burjassot, 46100, Valencia, Spain.
| | - Antonio Cano
- Department of Pediatrics, Obstetrics and Gynecology, University of Valencia and INCLIVA, Av Blasco Ibáñez 15, 46010, Valencia, Spain.
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17
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Zarzeczny R, Polak A, Nawrat-Szołtysik A, Manasar A. Associations between the serum levels of selected bone turnover markers and biological traits in nursing home women aged 80+ without inflammation. A pilot study. Exp Gerontol 2020; 137:110970. [PMID: 32428562 DOI: 10.1016/j.exger.2020.110970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/27/2020] [Accepted: 05/13/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Bone turnover markers (BTM) reflect the status of bone remodeling processes responsible for bone mineral density. The existing body of evidence that osseous tissue can interact with many other body tissues and organs suggests that the cross-talks can lead to different relationships. The biological traits associated with BTMs have not been thoroughly studied in the elderly despite bone turnover being known to increase with age. OBJECTIVE To determine whether the C-terminal crosslinking telopeptides of type I collagen (CTXI) and the serum levels of total (TAP) and bone-specific (BAP) alkaline phosphatase are associated with the biological traits in nursing home women aged 80-92 years without inflammation and, if so, to indicate the best predictors of these BTM's blood concentrations. METHODS A group of 64 female volunteers aged 80 years and older, the residents of nursing homes, were screened for the study. Fifty two women were ineligible as they met the exclusion criteria. As a result, the study group consisted of 12 participants (85.1 ± 3.9 years; 58.1 ± 8.7 kg; 1.52 ± 0.06 m), all having blood C-reactive protein (CRP) levels below 3 mg/l. Also assessed were the participants' morphology, glucose and insulin levels, lipid profiles, CTXI, TAP, and BAP. Other measured parameters included body composition, resting heart rate and arterial blood pressure, isometric knee extension peak torque (IKEPT), and walking capacity (6-min walk test). The statistical analysis was performed using Pearson's correlation coefficients, the Benjamini-Hochberg procedure, and a stepwise multiple regression analysis with backward elimination. RESULTS Inverse correlations were found between CTX-I and hemoglobin concentration (HGB) (r = -0.680; p = .015), red blood cells count (RBC) (r = -0.664; p = .019), fat-free mass (r = -0.633; p = .027), body weight (r = -0.589; p = .044), and total cholesterol (r = -0.581; p = .048). The multiple regression analysis of CTX-I showed that body weight was the only independent variable that was statistically significant (r2 = 0.346; p < .05; SEE = 0.347 ng/ml). BAP was positively correlated with double product (DP) (r = 0.742; p = .006), RBC (r = 0.650; p = .022), HGB (r = 0.637; p = .026), mean arterial pressure (MAP) (r = 0.622; p = .031), diastolic blood pressure (DBP) (r = 0.612; p = .034), body height (r = 0.603; p = .038), IKEPT (r = 0.565; p = .056), and systolic blood pressure (SBP) (r = 0.538; p = .071). BAP, a dependent variable, was the most closely correlated with DP (r2 = 0.550; p < .01; SEE = 9.161 U/l). TAP was also significantly associated with DP (r = 0.775; p = .003), with the association being stronger than between BAP and DP (r2 = 0.600; p < .01; SEE = 1000.5 beats/min*mm Hg). CONCLUSIONS In relatively healthy the oldest-old nursing home women without inflammation, total body weight was the best predictor of bone resorption shown by the CTX-I concentration, whereas the rate pressure product (DP) turned out to best predict osteoblastic activity determinable from serum alkaline phosphatase activity. The results of the study suggest that the activity of serum TAP and BAP can be enhanced by different mechanisms.
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Affiliation(s)
- Ryszard Zarzeczny
- Chair of Biomedical Sciences, Józef Piłsudski University of Physical Education, 34 Marymoncka str., 00-968 Warsaw 45, Poland.
| | - Anna Polak
- Chair of Physiotherapy Basics, The Jerzy Kukuczka Academy of Physical Education in Katowice, 72A Mikołowska str., 40-065 Katowice, Poland.
| | - Agnieszka Nawrat-Szołtysik
- Chair of Physiotherapy Basics, The Jerzy Kukuczka Academy of Physical Education in Katowice, 72A Mikołowska str., 40-065 Katowice, Poland.
| | - Ahmed Manasar
- Silesians Analytical Laboratories in Katowice, 1 Żelazna str., 40-851 Katowice, Poland.
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18
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Zhang L, Yang Y, Liao Z, Liu Q, Lei X, Li M, Saijilafu, Zhang Z, Hong D, Zhu M, Li B, Yang H, Chen J. Genetic and pharmacological activation of Hedgehog signaling inhibits osteoclastogenesis and attenuates titanium particle-induced osteolysis partly through suppressing the JNK/c-Fos-NFATc1 cascade. Theranostics 2020; 10:6638-6660. [PMID: 32550895 PMCID: PMC7295048 DOI: 10.7150/thno.44793] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 05/07/2020] [Indexed: 12/19/2022] Open
Abstract
Rationale: Wear particle-induced periprosthetic osteolysis (PPO) is a common long-term complication of total joint arthroplasty, and represents the major cause of aseptic loosening and subsequent implant failure. Previous studies have identified the central role of osteoclast-mediated bone resorption in the pathogenesis of PPO. Thus, therapeutic approaches of inhibiting osteoclast formation and activity are considered to be of great potential to prevent and treat this osteolytic disease. Hedgehog (Hh) signaling has been shown to play an important role in promoting osteoblast differentiation and bone formation. While Hh signaling is also implicated in regulating osteoclastogenesis, whether it can directly inhibit osteoclast differentiation and bone resorption remains controversial. Moreover, its potential therapeutic effects on PPO have never been assessed. In this study, we explored the cell-autonomous role of Hh signaling in regulating osteoclastogenesis and its therapeutic potential in preventing wear particle-induced osteolysis. Methods: Hh signaling was activated in macrophages by genetically ablating Sufu in these cells using LysM-Cre or by treating them with purmorphamine (PM), a pharmacological activator of Smoothened (Smo). In vitro cell-autonomous effects of Hh pathway activation on RANKL-induced osteoclast differentiation and activity were evaluated by TRAP staining, phalloidin staining, qPCR analyses, and bone resorption assays. In vivo evaluation of its therapeutic efficacy against PPO was performed in a murine calvarial model of titanium particle-induced osteolysis by μCT and histological analyses. Mechanistic details were explored in RANKL-treated macrophages through Western blot analyses. Results: We found that Sufu deletion or PM treatment potently activated Hh signaling in macrophages, and strongly inhibited RANKL-induced TRAP+ osteoclast production, F-actin ring formation, osteoclast-specific gene expression, and osteoclast activity in vitro. Furthermore, we found that Sufu deletion or PM administration significantly attenuated titanium particle-induced osteoclast formation and bone loss in vivo. Our mechanistic study revealed that activation of Hh signaling suppressed RANKL-induced activation of JNK pathway and downregulated protein levels of two key osteoclastic transcriptional factors, c-Fos and its downstream target NFATc1. Conclusions: Both genetic and pharmacological activation of Hh signaling can cell-autonomously inhibit RANKL-induced osteoclast differentiation and activity in vitro and protect against titanium particle-induced osteolysis in vivo. Mechanistically, Hh signaling hinders osteoclastogenesis partly through suppressing the JNK/c-Fos-NFATc1 cascade. Thus, Hh signaling may serve as a promising therapeutic target for the prevention and treatment of PPO and other osteolytic diseases.
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Affiliation(s)
- Liwei Zhang
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
| | - Yanjun Yang
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
| | - Zirui Liao
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
| | - Qingbai Liu
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
| | - Xinhuan Lei
- Orthopedic Department, Taizhou Hospital Affiliated to Wenzhou Medical University, Linhai, Zhejiang 317000, China
| | - Meng Li
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
| | - Saijilafu
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
| | - Zunyi Zhang
- Institute of Life Sciences, College of Life and Environmental Science, Key Laboratory of Mammalian Organogenesis and Regeneration, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
| | - Dun Hong
- Orthopedic Department, Taizhou Hospital Affiliated to Wenzhou Medical University, Linhai, Zhejiang 317000, China
| | - Min Zhu
- Orthopedic Department, Taizhou Hospital Affiliated to Wenzhou Medical University, Linhai, Zhejiang 317000, China
| | - Bin Li
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
| | - Huilin Yang
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
| | - Jianquan Chen
- Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu 215007, China
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19
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Yang Y, Liu Q, Zhang L, Fu X, Chen J, Hong D. A modified tape transfer approach for rapidly preparing high-quality cryosections of undecalcified adult rodent bones. J Orthop Translat 2020; 26:92-100. [PMID: 33437628 PMCID: PMC7773961 DOI: 10.1016/j.jot.2020.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/18/2020] [Accepted: 03/02/2020] [Indexed: 12/28/2022] Open
Abstract
Background/Objective Histology-based analyses are important tools to dissect cellular and molecular mechanisms of skeletal homeostasis, diseases, and regeneration. The success of these efforts is highly dependent on rapidly obtaining high-quality sections of mineralized skeletal tissues suitable for various analyses. However, the current techniques for preparing such sections are still far from satisfactory. This study aimed to develop a new approach for preparing high-quality undecalcified bone sections applicable to various histological analyses. Methods Two important modifications were made to the conventional Cryojane Tape-Transfer System, including utilization of an optimized adhesive to prepare adhesive glass slides for improving the transfer efficiency, and a cheap conventional benchtop UV transilluminator for UV curing. Cryosections of undecalcified rodent bones were prepared using this modified tape transfer approach, and their tissue morphology and structural integrity were visually examined. A variety of histological analyses, including calcein labeling, Von kossa staining, immunofluorescence, and enzymatic activity staining as well as 5-Ethynyl-2’-deoxyuridine (EdU) and TUNEL assays, were performed on these sections. Results We developed a modified version of tape transfer approach that can prepare cryosections of undecalcified rodent adult bones within 4 days at a low cost. Bone sections prepared by this approach exhibited good tissue morphology and structural integrity. Moreover, these sections were applicable to a variety of histological analyses, including calcein labeling, Von kossa staining, immunofluorescence, and enzymatic activity staining as well as EdU and TUNEL assays. Conclusion The tape transfer approach we developed provides a rapid, affordable, and easy learning method for preparing high-quality undecalcified bone sections valuable for bone research. The translational potential of this article Our research provides a rapid, affordable, and easy learning method for preparing high-quality undecalcified bone sections that can be potentially used for accurate diagnosis of various bone disorders and evaluation of the efficacy of different therapies in the treatment of these diseases.
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Affiliation(s)
- Yanjun Yang
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.,Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Qingbai Liu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Department of Orthopedics, Lianshui County People's Hospital, Huaian, Jiangsu, China
| | - Liwei Zhang
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.,Orthopedic Department, Taizhou Hospital Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China
| | - Xuejie Fu
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.,Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Jianquan Chen
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.,Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Dun Hong
- Orthopedic Department, Taizhou Hospital Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China
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Qamar H, Waqas M, Li A, Iqbal M, Mehmood K, Li J. Plastrum Testudinis Extract Mitigates Thiram Toxicity in Broilers via Regulating PI3K/AKT Signaling. Biomolecules 2019; 9:biom9120784. [PMID: 31779199 PMCID: PMC6995622 DOI: 10.3390/biom9120784] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/08/2019] [Accepted: 11/20/2019] [Indexed: 12/15/2022] Open
Abstract
Tibial dyschondroplasia (TD) negatively affects broilers all over the world, in which the accretion of the growth plate (GP) develops into tibial proximal metaphysis. Plastrum testudinis extract (PTE) is renowned as a powerful antioxidant, anti-inflammatory, and bone healing agent. The current study was conducted to evaluate the efficacy of PTE for the treatment of thiram-induced TD chickens. Broilers (day old; n = 300) were raised for 3 days with normal feed. On the 4th day, three groups (n = 100 each) were sorted, namely, the control (normal diet), TD, and PTE groups (normal diet+ thiram 50 mg/kg). On the 7th day, thiram was stopped in the TD and PTE group, and the PTE group received a normal diet and PTE (30 mg/kg/day). Plastrum testudinis extract significantly restored (p < 0.05) the liver antioxidant enzymes, inflammatory cytokines, serum biochemicals, GP width, and tibia weight as compared to the TD group. The PTE administration significantly increased (p < 0.05) growth performance, vascularization, AKT (serine/threonine-protein kinase), and PI3K expressions and the number of hepatocytes and chondrocytes with intact nuclei were enhanced. In conclusion, PTE has the potential to heal TD lesions and act as an antioxidant and anti-inflammatory drug in chickens exposed to thiram via the upregulation of AKT and PI3K expressions.
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Affiliation(s)
- Hammad Qamar
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (H.Q.); (M.W.); (M.I.); (K.M.)
| | - Muhammad Waqas
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (H.Q.); (M.W.); (M.I.); (K.M.)
- Faculty of Veterinary & Animal Sciences, University of the Poonch, Rawalakot, District Poonch 12350, Azad Jammu & Kashmir, Pakistan
| | - Aoyun Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (H.Q.); (M.W.); (M.I.); (K.M.)
| | - Mudassar Iqbal
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (H.Q.); (M.W.); (M.I.); (K.M.)
- University College of Veterinary & Animal Sciences, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Khalid Mehmood
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (H.Q.); (M.W.); (M.I.); (K.M.)
- University College of Veterinary & Animal Sciences, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Jiakui Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (H.Q.); (M.W.); (M.I.); (K.M.)
- College of Animals Husbandry and Veterinary Medicine, Tibet Agricultural and Animal Husbandry University, Linzhi, Tibet 860000, China
- Correspondence: ; Tel.: +86-027-87286251
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Modulation of Bone and Marrow Niche by Cholesterol. Nutrients 2019; 11:nu11061394. [PMID: 31234305 PMCID: PMC6628005 DOI: 10.3390/nu11061394] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 06/14/2019] [Accepted: 06/17/2019] [Indexed: 12/21/2022] Open
Abstract
Bone is a complex tissue composing of mineralized bone, bone cells, hematopoietic cells, marrow adipocytes, and supportive stromal cells. The homeostasis of bone and marrow niche is dynamically regulated by nutrients. The positive correlation between cardiovascular disease and osteoporosis risk suggests a close relationship between hyperlipidemia and/or hypercholesterolemia and the bone metabolism. Cholesterol and its metabolites influence the bone homeostasis through modulating the differentiation and activation of osteoblasts and osteoclasts. The effects of cholesterol on hematopoietic stem cells, including proliferation, migration, and differentiation, are also well-documented and further relate to atherosclerotic lesions. Correlation between circulating cholesterol and bone marrow adipocytes remains elusive, which seems opposite to its effects on osteoblasts. Epidemiological evidence has demonstrated that cholesterol deteriorates or benefits bone metabolism depending on the types, such as low-density lipoprotein (LDL) or high-density lipoprotein (HDL) cholesterol. In this review, we will summarize the latest progress of how cholesterol regulates bone metabolism and bone marrow microenvironment, including the hematopoiesis and marrow adiposity. Elucidation of these association and factors is of great importance in developing therapeutic options for bone related diseases under hypercholesterolemic conditions.
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Liu C, An F, Cao Y, Wang J, Tian Y, Wu H, Wang J. Significant association between RETN genetic polymorphisms and alcohol-induced osteonecrosis of femoral head. Mol Genet Genomic Med 2019; 7:e822. [PMID: 31207150 PMCID: PMC6687866 DOI: 10.1002/mgg3.822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Alcohol-induced osteonecrosis of femoral head (ONFH) is a complex disease and genetic factors are one of the causes. The purpose of this study is to investigate the effects of RETN (resistin; OMIM: 605565) and LDLR (low density lipoprotein receptor; OMIM: 606945) polymorphisms on the risk of alcohol-induced ONFH in Chinese Han population. METHODS A case-control study including 201 patients and 201 controls was designed. Seven single nucleotide polymorphisms (SNPs) in RETN gene and four SNPs in LDLR gene were genotyped using Agena MassARRAY platform. In allele model and genetic model, chi-square test and logistic regression were used to study the associations between these SNPs and ONFH susceptibility. In addition, the relationships between these SNPs, clinical phenotypes, and blood lipid level with one-way analysis of variance were analyzed. RESULTS In the allele model, rs7408174 and rs3745369 in RETN were associated with increased risk of alcohol-induced ONFH, whereas rs34861192 and rs3219175 in RETN showed reduced risk of alcohol-induced ONFH. In the genetic model, rs7408174 was associated with increased risk of alcohol-induced ONFH in dominant model and log-additive model. Rs3745369 showed an increased risk in codominant model, recessive model, and log-additive model. Rs34861192 showed a decreased risk in codominant model, dominant model, and log-additive model, and rs3219175 showed a decreased risk in dominant model and log-additive model. The rs3745368 in RETN was associated with the clinical stage of the disease. CONCLUSION These results suggest that RETN genetic polymorphisms are associated with the susceptibility of alcohol-induced ONFH in Chinese Han population.
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Affiliation(s)
- Chang Liu
- Inner Mongolia Medical University, Hohhot, China.,Department of Orthopedics and Traumatology, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Feimeng An
- Inner Mongolia Medical University, Hohhot, China.,Department of Orthopedics and Traumatology, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Yuju Cao
- Zhengzhou Traditional Chinese Medicine (TCM) Traumatology Hospital, Zhengzhou, China
| | - Jiaqi Wang
- Inner Mongolia Medical University, Hohhot, China.,Department of Orthopedics and Traumatology, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Ye Tian
- Inner Mongolia Medical University, Hohhot, China.,Department of Orthopedics and Traumatology, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Huiqiang Wu
- Inner Mongolia Autonomous Region Hospital of Traditional Chinese Medicine, Hohhot, China
| | - Jianzhong Wang
- Department of Orthopedics and Traumatology, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
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Asperosaponin VI stimulates osteogenic differentiation of rat adipose-derived stem cells. Regen Ther 2019; 11:17-24. [PMID: 31193169 PMCID: PMC6518317 DOI: 10.1016/j.reth.2019.03.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 02/14/2019] [Accepted: 03/20/2019] [Indexed: 12/20/2022] Open
Abstract
In the aging population, the decrease on osteogenic differentiation resulted into a significant reduction in bone formation. Bone tissue engineering has been a successful technique for treatment of bone defects. It is reported that adipose-derived stem cells (ADSCs) have pluripotency to differentiate into adipocytes and osteoblasts. However little is revealed about the effect of the herbal medicine Asperosaponin VI (ASA VI) on ADSCs differentiation. In our study, we isolated and identified ADSCs from rats. We examined the effect of different concentrations of ASA VI in ADSCs on alkaline phosphatase (ALP) activity, calcium deposition, the expression of bone-related proteins and the release of inflammatory cytokines. Flowcytometry assay showed ADSCs were highly expressed CD44 and CD105, but hardly expressed CD34 and CD45, suggesting ADSCs were successfully isolated for follow-up experiments. ALP activity examination and Alizarin red (AR) stain showed that ASA VI enhanced the ALP activity and promoted matrix mineralization in ADSCs. In addition, bone-related protein OCN and RUNX2, and Smad2/3 phosphorylation was upregulated after ASA VI treatment in ADSCs. ELISA results showed that ASA VI blocked the release of TNF-α, IL-6 and IL-1β in ADSCs. Considering this results, we concluded that ASA VI promotes osteogenic differentiation of ADSCs through inducing the expression of bone-related proteins. These findings enriched the function of ASA VI as a regenerative medicine and shed new light for the treatment of bone defects in clinical research.
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