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Yang X, Zhang ZC, Lu YN, Chen HL, Wang HS, Lin T, Chen QQ, Chen JS, He WB. Identification and experimental validation of programmed cell death- and mitochondria-associated biomarkers in osteoporosis and immune microenvironment. Front Genet 2024; 15:1439171. [PMID: 39130750 PMCID: PMC11310001 DOI: 10.3389/fgene.2024.1439171] [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: 06/06/2024] [Accepted: 07/08/2024] [Indexed: 08/13/2024] Open
Abstract
Background: Prior research has demonstrated that programmed cell death (PCD) and mitochondria assume pivotal roles in controlling cellular metabolism and maintaining bone cell equilibrium. Nonetheless, the comprehensive elucidation of their mode of operation in osteoporosis (OP) warrants further investigation. Therefore, this study aimed at analyzing the role of genes associated with PCD (PCD-RGs) and mitochondria (mortality factor-related genes; MRGs) in OP. Methods: Differentially expressed genes (DEGs) were identified by subjecting the GSE56815 dataset obtained from the Gene Expression Omnibus database to differential expression analysis and comparing OP patients with healthy individuals. The genes of interest were ascertained through the intersection of DEGs, MRGs, and PCD-RGs; these genes were filtered using machine learning methodologies to discover potential biomarkers. The prospective biomarkers displaying uniform patterns and statistically meaningful variances were identified by evaluating their levels in the GSE56815 dataset and conducting quantitative real-time polymerase chain reaction-based assessments. Moreover, the functional mechanisms of these biomarkers were further delineated by constructing a nomogram, which conducted gene set enrichment analysis, explored immune infiltration, generated regulatory networks, predicted drug responses, and performed molecular docking analyses. Results: Eighteen candidate genes were documented contingent upon the intersection between 2,354 DEGs, 1,136 MRGs, and 1,548 PCD-RGs. The biomarkers DAP3, BIK, and ACAA2 were upregulated in OP and were linked to oxidative phosphorylation. Furthermore, the predictive ability of the nomogram designed based on the OP biomarkers exhibited a certain degree of accuracy. Correlation analysis revealed a strong positive correlation between CD56dim natural killer cells and ACAA2 and a significant negative correlation between central memory CD4+ T cells and DAP3. DAP3, BIK, and ACAA2 were regulated by multiple factors; specifically, SETDB1 and ZNF281 modulated ACAA2 and DAP3, whereas TP63 and TFAP2C governed DAP3 and BIK. Additionally, a stable binding force was observed between the drugs (estradiol, valproic acid, and CGP52608) and the biomarkers. Conclusion: This investigation evidenced that the biomarkers DAP3, BIK, and ACAA2 are associated with PCD and mitochondria in OP, potentially facilitate the diagnosis of OP in clinical settings.
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Affiliation(s)
- Xiu Yang
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- Fuzong Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Zheng-Chao Zhang
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- Department of Emergency Trauma Surgery, Fujian Provincial Hospital, Fuzhou, China
- Fujian Trauma Medicine Center, Fuzhou, China
- Fujian Key Laboratory of Emergency Medicine, Fuzhou, China
| | - Yun-Nan Lu
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- Department of Paediatric Orthopaedics, Fuzhou Second Hospital, The Third Clinical Medicine College of Fujian Medical University, Fuzhou, China
| | - Han-Lin Chen
- Fuzong Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Hong-Shen Wang
- Fuzong Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Tao Lin
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Qing-Quan Chen
- Fuzong Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Jin-Shui Chen
- Fuzong Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Wu-Bing He
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- Department of Emergency Trauma Surgery, Fujian Provincial Hospital, Fuzhou, China
- Fujian Trauma Medicine Center, Fuzhou, China
- Fujian Key Laboratory of Emergency Medicine, Fuzhou, China
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Wu H, Chen G, Zhang G, Lv Q, Gu D, Dai M. Mechanism of vascular endothelial cell-derived exosomes modified with vascular endothelial growth factor in steroid-induced femoral head necrosis. Biomed Mater 2023; 18. [PMID: 36794758 DOI: 10.1088/1748-605x/acb412] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 01/17/2023] [Indexed: 02/17/2023]
Abstract
Steroid-induced avascular necrosis of the femoral head (SANFH) is an intractable orthopedic disease. This study investigated the regulatory effect and molecular mechanism of vascular endothelial cell (VEC)-derived exosomes (Exos) modified with vascular endothelial growth factor (VEGF) in osteogenic and adipogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) in SANFH. VECs were culturedin vitroand transfected with adenovirus Adv-VEGF plasmids. Exos were extracted and identified.In vitro/vivoSANFH models were established and treated with VEGF-modified VEC-Exos (VEGF-VEC-Exos). The internalization of Exos by BMSCs, proliferation and osteogenic and adipogenic differentiation of BMSCs were determined by the uptake test, cell counting kit-8 (CCK-8) assay, alizarin red staining, and oil red O staining. Meanwhile, the mRNA level of VEGF, the appearance of the femoral head, and histological analysis were assessed by reverse transcription quantitative polymerase chain reaction and hematoxylin-eosin staining. Moreover, the protein levels of VEGF, osteogenic markers, adipogenic markers, and mitogen-activated protein kinase (MAPK)/extracellular regulated protein kinases (ERK) pathway-related indicators were examined by Western blotting, along with evaluation of the VEGF levels in femur tissues by immunohistochemistry. Glucocorticoid (GC) induced adipogenic differentiation of BMSCs and inhibited osteogenic differentiation. VEGF-VEC-Exos accelerated the osteogenic differentiation of GC-induced BMSCs and inhibited adipogenic differentiation. VEGF-VEC-Exos activated the MAPK/ERK pathway in GC-induced BMSCs. VEGF-VEC-Exos promoted osteoblast differentiation and suppressed adipogenic differentiation of BMSCs by activating the MAPK/ERK pathway. VEGF-VEC-Exos accelerated bone formation and restrained adipogenesis in SANFH rats. VEGF-VEC-Exos carried VEGF into BMSCs and motivated the MAPK/ERK pathway, thereby promoting osteoblast differentiation of BMSCs in SANFH, inhibiting adipogenic differentiation, and alleviating SANFH.
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Affiliation(s)
- Hongliang Wu
- Department of Orthopedics, Shanghai Punan Hospital of Pudong New District, Shanghai 200125, People's Republic of China
| | - Guocheng Chen
- Department of Orthopedics, Shanghai Punan Hospital of Pudong New District, Shanghai 200125, People's Republic of China
| | - Guibao Zhang
- Department of Orthopedics, Shanghai Punan Hospital of Pudong New District, Shanghai 200125, People's Republic of China
| | - Qiang Lv
- Department of Orthopedics, Shanghai Punan Hospital of Pudong New District, Shanghai 200125, People's Republic of China
| | - Di Gu
- Department of Orthopedics, Shanghai Punan Hospital of Pudong New District, Shanghai 200125, People's Republic of China
| | - Minhua Dai
- Department of Orthopedics, Shanghai Punan Hospital of Pudong New District, Shanghai 200125, People's Republic of China
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Tao ZS, Li TL, Xu HG, Yang M. Hydrogel contained valproic acid accelerates bone-defect repair via activating Notch signaling pathway in ovariectomized rats. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 33:4. [PMID: 34940936 PMCID: PMC8702411 DOI: 10.1007/s10856-021-06627-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 11/16/2021] [Indexed: 05/23/2023]
Abstract
The purpose was to observe whether valproic acid (VPA) has a positive effect on bone-defect repair via activating the Notch signaling pathway in an OVX rat model. The MC3T3-E1 cells were cocultured with VPA and induced to osteogenesis, and the osteogenic activity was observed by alkaline phosphatase (ALP) staining, Alizarin Red (RES) staining and Western blotting (WB). Then the hydrogel-containing VPA was implanted into the femoral epiphysis bone-defect model of ovariectomized (OVX) rats for 12 weeks. Micro-CT, biomechanical testing, histology, immunofluorescence, RT-qPCR, and WB analysis were used to observe the therapeutic effect and explore the possible mechanism. ALP and ARS staining and WB results show that the cell mineralization, osteogenic activity, and protein expression of ALP, OPN, RUNX-2, OC, Notch 1, HES1, HEY1, and JAG1 of VPA group is significantly higher than the control group. Micro-CT, biomechanical testing, histology, immunofluorescence, and RT-qPCR evaluation show that group VPA presented the stronger effect on bone strength, bone regeneration, bone mineralization, higher expression of VEGFA, BMP-2, ALP, OPN, RUNX-2, OC, Notch 1, HES1, HEY1, and JAG1 of VPA when compared with OVX group. Our current study demonstrated that local treatment with VPA could stimulate repair of femoral condyle defects, and these effects may be achieved by activating Notch signaling pathway and acceleration of blood vessel and bone formation.
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Affiliation(s)
- Zhou-Shan Tao
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, No. 2, Zhe shan Xi Road, Wuhu, 241001, Anhui, People's Republic of China.
| | - Tian-Lin Li
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, No. 2, Zhe shan Xi Road, Wuhu, 241001, Anhui, People's Republic of China
| | - Hong-Guang Xu
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, No. 2, Zhe shan Xi Road, Wuhu, 241001, Anhui, People's Republic of China
| | - Min Yang
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, No. 2, Zhe shan Xi Road, Wuhu, 241001, Anhui, People's Republic of China
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Golubinskaya PA, Sarycheva MV, Burda SY, Puzanov MV, Nadezhdina NA, Kulikovskiy VF, Nadezhdin SV, Korokin MV, Burda YE. Pharmacological modulation of cell functional activity with valproic acid and erythropoietin. RESEARCH RESULTS IN PHARMACOLOGY 2019. [DOI: 10.3897/rrpharmacology.5.34710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Introduction: Valproic acid (VA) is carboxylic acid with a branched chain, which is used as an antiepileptic drug.
Valproic acid influence on cells in vivo: VA, which is an antiepileptic drug, is also a teratogen, which causes defects of a neural tube and an axial skeleton, although the mechanisms are not yet fully clear.
Valproic acid influence on mesenchymal stem cells (MSC) in vitro: It is shown that valproic acid reduces the intracellular level of oxygen active forms.
Valproic acid effect on tumor cells: VA inhibits tumor growth through several mechanisms, including the cell cycle stop, differentiation induction and inhibition of growth of tumor vessels.
Valproic acid influence on enzymes: It affects mainly GSK-3.
Valproic acid influence on animals’ cells: It is shown that VA can significantly improve an ability to develop in vitro and improve nuclear reprogramming of embryos.
Erythropoietin (EPO): Is an hypoxia-induced hormone and a cytokine, which is necessary for normal erythropoiesis. EPO is widely used in in vitro experiments.
Conclusion: Thus, the influence of VA and EPO on cells can be used in cell technologies.
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