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Simbilyabo LZ, Yang L, Wen J, Liu Z. The unfolded protein response machinery in glioblastoma genesis, chemoresistance and as a druggable target. CNS Neurosci Ther 2024; 30:e14839. [PMID: 39021040 PMCID: PMC11255034 DOI: 10.1111/cns.14839] [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: 03/14/2024] [Revised: 06/22/2024] [Accepted: 06/24/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND The role of the unfolded protein response (UPR) has been progressively unveiled over the last decade and several studies have investigated its implication in glioblastoma (GB) development. The UPR restores cellular homeostasis by triggering the folding and clearance of accumulated misfolded proteins in the ER consecutive to endoplasmic reticulum stress. In case it is overwhelmed, it induces apoptotic cell death. Thus, holding a critical role in cell fate decisions. METHODS This article, reviews how the UPR is implicated in cell homeostasis maintenance, then surveils the evidence supporting the UPR involvement in GB genesis, progression, angiogenesis, GB stem cell biology, tumor microenvironment modulation, extracellular matrix remodeling, cell fate decision, invasiveness, and grading. Next, it concurs the evidence showing how the UPR mediates GB chemoresistance-related mechanisms. RESULTS The UPR stress sensors IRE1, PERK, and ATF6 with their regulator GRP78 are upregulated in GB compared to lower grade gliomas and normal brain tissue. They are activated in response to oncogenes and are implicated at different stages of GB progression, from its genesis to chemoresistance and relapse. The UPR arms can be effectors of apoptosis as mediators or targets. CONCLUSION Recent research has established the role of the UPR in GB pathophysiology and chemoresistance. Targeting its different sensors have shown promising in overcoming GB chomo- and radioresistance and inducing apoptosis.
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Affiliation(s)
- Lucette Z. Simbilyabo
- Department of Neurosurgery, Xiangya HospitalCentral South UniversityChangshaHunanChina
- Hypothalamic Pituitary Research Center, Xiangya HospitalCentral South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric Disorders, Xiangya HospitalCentral South UniversityChangshaHunanChina
| | - Liting Yang
- Department of Neurosurgery, Xiangya HospitalCentral South UniversityChangshaHunanChina
- Hypothalamic Pituitary Research Center, Xiangya HospitalCentral South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric Disorders, Xiangya HospitalCentral South UniversityChangshaHunanChina
| | - Jie Wen
- Department of Neurosurgery, Xiangya HospitalCentral South UniversityChangshaHunanChina
- Hypothalamic Pituitary Research Center, Xiangya HospitalCentral South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric Disorders, Xiangya HospitalCentral South UniversityChangshaHunanChina
| | - Zhixiong Liu
- Department of Neurosurgery, Xiangya HospitalCentral South UniversityChangshaHunanChina
- Hypothalamic Pituitary Research Center, Xiangya HospitalCentral South UniversityChangshaHunanChina
- National Clinical Research Center for Geriatric Disorders, Xiangya HospitalCentral South UniversityChangshaHunanChina
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Schneider B, William D, Lamp N, Zimpfer A, Henker C, Classen CF, Erbersdobler A. The miR-183/96/182 cluster is upregulated in glioblastoma carrying EGFR amplification. Mol Cell Biochem 2022; 477:2297-2307. [PMID: 35486213 PMCID: PMC9395473 DOI: 10.1007/s11010-022-04435-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 04/08/2022] [Indexed: 11/29/2022]
Abstract
Glioblastoma (GBM) is one of the most frequent primary brain tumors. Limited therapeutic options and high recurrency rates lead to a dismal prognosis. One frequent, putative driver mutation is the genomic amplification of the oncogenic receptor tyrosine kinase EGFR. Often accompanied by variants like EGFRvIII, heterogenous expression and ligand independent signaling render this tumor subtype even more difficult to treat, as EGFR-directed therapeutics show only weak effects at best. So EGFR-amplified GBM is considered to have an even worse prognosis, and therefore, deeper understanding of molecular mechanisms and detection of potential targets for novel therapeutic strategies is urgently needed. In this study, we looked at the level of microRNAs (miRs), small non-coding RNAs frequently deregulated in cancer, both acting as oncogenes and tumor suppressors. Comparative analysis of GBM with and without EGFR amplification should give insight into the expression profiles of miRs, which are considered both as potential targets for directed therapies or as therapeutic reagents. Comparison of miR profiles of EGFR-amplified and EGFR-normal GBM revealed an upregulation of the miR-183/96/182 cluster, which is associated with oncogenic properties in several tumor entities. One prominent target of this miR cluster is FOXO1, a pro-apoptotic factor. By observing FOXO1 downregulation in EGFR-amplified tumors, we can see a significant correlation of EGFR amplification, miR-183/96/182 cluster upregulation, and repression of FOXO1. Although no significant difference in overall survival is shown, these data may contribute to the molecular understanding of this tumor subtype and offer potential targets for miR-based therapies.
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Affiliation(s)
- Björn Schneider
- Institute of Pathology, University Medicine Rostock, Strempelstr. 14, 18057 Rostock, Germany
| | - Doreen William
- Children and Adolescents Hospital, University Medicine Rostock, Ernst-Heydemann-Str. 8, 18057 Rostock, Germany
- Present Address: ERN-GENTURIS, Hereditary Cancer Syndrome Center Dresden, Institute for Clinical Genetics, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
| | - Nora Lamp
- Institute of Pathology, University Medicine Rostock, Strempelstr. 14, 18057 Rostock, Germany
| | - Annette Zimpfer
- Institute of Pathology, University Medicine Rostock, Strempelstr. 14, 18057 Rostock, Germany
| | - Christian Henker
- Department of Neurosurgery, University Medicine Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Carl Friedrich Classen
- Children and Adolescents Hospital, University Medicine Rostock, Ernst-Heydemann-Str. 8, 18057 Rostock, Germany
| | - Andreas Erbersdobler
- Institute of Pathology, University Medicine Rostock, Strempelstr. 14, 18057 Rostock, Germany
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Zhang S, Shao Z, Liu X, Hou M, Cheng F, Lei D, Yuan H. The E50K optineurin mutation impacts autophagy-mediated degradation of TDP-43 and leads to RGC apoptosis in vivo and in vitro. Cell Death Dis 2021; 7:49. [PMID: 33723228 PMCID: PMC7960725 DOI: 10.1038/s41420-021-00432-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/23/2021] [Accepted: 02/13/2021] [Indexed: 01/31/2023]
Abstract
The glaucoma-associated E50K mutation in optineurin (OPTN) is known to affect autophagy and cause the apoptosis of retinal ganglion cells (RGCs), but the pathogenic mechanism remains unclear. In this study, we investigated whether the OPTN (E50K) mutation caused TDP-43 aggregation by disrupting autophagy in vivo and in vitro. OPTN (E50K) mutant mice were generated and analysed for genotype and phenotype. Adeno-associated virus type 2 vectors containing either GFP only, GFP-tagged wild-type OPTN or GFP-tagged E50K-mutated OPTN were used to transfect R28 cells. Loss of RGCs decreased retinal thickness and visual impairment were observed in OPTN (E50K) mice compared with WT mice. Moreover, overexpression of E50K OPTN induced R28 cell apoptosis. Increased p62/SQSTM1 and LC3-II levels indicated that autophagic flux was inhibited and contributed to TDP-43 aggregation in vivo and in vitro. We found that rapamycin effectively reduced the aggregation of TDP-43 in OPTN (E50K) mice and decreased the protein levels of p62/SQSTM1 and the autophagic marker LC3-II. Moreover, rapamycin increased the RGC number and visual function of E50K mice. In addition, we also observed increased cytoplasmic TDP-43 in the spinal cord and motor dysfunction in 24-month-old OPTN (E50K) mice, indicating that TDP-43 accumulation may be the common pathological mechanism of glaucoma and amyotrophic lateral sclerosis (ALS). In conclusion, the disruption of autophagy by OPTN (E50K) affected the degradation of TDP-43 and may play an important role in OPTN (E50K)-mediated glaucomatous retinal neurodegeneration.
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Affiliation(s)
- Shiqi Zhang
- grid.412463.60000 0004 1762 6325Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China ,grid.410736.70000 0001 2204 9268The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry Education, Heilongjiang Province, Harbin, China
| | - Zhengbo Shao
- grid.412463.60000 0004 1762 6325Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China ,grid.412463.60000 0004 1762 6325Research Institute, Second Affiliated Hospital of Harbin Medical University, Harbin, China ,grid.412463.60000 0004 1762 6325Future Medical Laboratory, the Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xinna Liu
- grid.412463.60000 0004 1762 6325Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China ,grid.410736.70000 0001 2204 9268The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry Education, Heilongjiang Province, Harbin, China
| | - Mingying Hou
- grid.412463.60000 0004 1762 6325Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China ,grid.410736.70000 0001 2204 9268The Key Laboratory of Myocardial Ischemia, Harbin Medical University, Ministry Education, Heilongjiang Province, Harbin, China
| | - Fang Cheng
- grid.412463.60000 0004 1762 6325Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China ,grid.412463.60000 0004 1762 6325Research Institute, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Dawei Lei
- grid.412463.60000 0004 1762 6325Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Huiping Yuan
- grid.412463.60000 0004 1762 6325Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China ,grid.412463.60000 0004 1762 6325Research Institute, Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Liu K, Tsung K, Attenello FJ. Characterizing Cell Stress and GRP78 in Glioma to Enhance Tumor Treatment. Front Oncol 2020; 10:608911. [PMID: 33363039 PMCID: PMC7759649 DOI: 10.3389/fonc.2020.608911] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 11/11/2020] [Indexed: 02/06/2023] Open
Abstract
Glioblastoma (GBM) is the most common primary brain tumor, carrying a very poor prognosis, with median overall survival at about 12 to 15 months despite surgical resection, chemotherapy with temozolomide (TMZ), and radiation therapy. GBM recurs in the vast majority of patients, with recurrent tumors commonly displaying increase in resistance to standard of care chemotherapy, TMZ, as well as radiotherapy. One of the most commonly cited mechanisms of chemotherapeutic and radio-resistance occurs via the glucose-regulated protein 78 (GRP78), a well-studied mediator of the unfolded protein response (UPR), that has also demonstrated potential as a biomarker in GBM. Overexpression of GRP78 has been directly correlated with malignant tumor characteristics, including higher tumor grade, cellular proliferation, migration, invasion, poorer responses to TMZ and radiation therapy, and poorer patient outcomes. GRP78 expression is also higher in GBM tumor cells upon recurrence. Meanwhile, knockdown or suppression of GRP78 has been shown to sensitize cells to TMZ and radiation therapy. In light of these findings, various novel developing therapies are targeting GRP78 as monotherapies, combination therapies that enhance the effects of TMZ and radiation therapy, and as treatment delivery modalities. In this review, we delineate the mechanisms by which GRP78 has been noted to specifically modulate glioblastoma behavior and discuss current developing therapies involving GRP78 in GBM. While further research is necessary to translate these developing therapies into clinical settings, GRP78-based therapies hold promise in improving current standard-of-care GBM therapy and may ultimately lead to improved patient outcomes.
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Affiliation(s)
- Kristie Liu
- Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States
| | - Kathleen Tsung
- Department of Neurosurgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States
| | - Frank J Attenello
- Department of Neurosurgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States
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Niu L, Chen S, Yang X, Ma C, Pan C, Wang H, Li Q, Geng F, Tang X. Vitamin D decreases Porphyromonas gingivalis internalized into macrophages by promoting autophagy. Oral Dis 2020; 27:1775-1788. [PMID: 33098722 DOI: 10.1111/odi.13696] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/16/2020] [Accepted: 10/19/2020] [Indexed: 01/01/2023]
Abstract
OBJECTIVES This paper aims to study the effect of the active form of vitamin D (calcitriol) on the internalized Porphyromonas gingivalis in macrophages and to assess the role of autophagy during this process. MATERIALS AND METHODS Quantitative RT-PCR and bacteria culture were used to quantify live P. gingivalis internalized into U937-derived macrophages. Western blot assays were performed to detect the effect of P. gingivalis and calcitriol on autophagy in macrophages. Transmission electron microscope was used to observe the effect of calcitriol on the status of internalized P. gingivalis. Colocalization of P. gingivalis with the autophagosome and lysosome markers was observed by confocal laser scanning microscopy. RESULTS Calcitriol caused a dose-dependent decrease in live P. gingivalis numbers and promoted both the endogenous and P. gingivalis-induced autophagy in macrophages. Calcitriol significantly promoted the destruction of P. gingivalis and the colocalization of P. gingivalis with autophagosome and lysosome markers. Conversely, with 3-MA, live P. gingivalis numbers in macrophages increased significantly and inhibition effect of calcitriol on the number of live P. gingivalis was attenuated. CONCLUSION In U937-derived macrophages, calcitriol may promote colocalization of P. gingivalis with autophagosomes and lysosomes, namely autophagy process, to degrade live P. gingivalis.
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Affiliation(s)
- Li Niu
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China.,Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Shuangshuang Chen
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Xue Yang
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Chunliang Ma
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Chunling Pan
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Hongyan Wang
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Qian Li
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Fengxue Geng
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Xiaolin Tang
- Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
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Xia Q, Xu M, Zhang P, Liu L, Meng X, Dong L. Therapeutic Potential of Autophagy in Glioblastoma Treatment With Phosphoinositide 3-Kinase/Protein Kinase B/Mammalian Target of Rapamycin Signaling Pathway Inhibitors. Front Oncol 2020; 10:572904. [PMID: 33123479 PMCID: PMC7567033 DOI: 10.3389/fonc.2020.572904] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 08/20/2020] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma (GB) is the most malignant and aggressive form of brain tumor, characterized by frequent hyperactivation of the phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) signaling pathway. PI3K/AKT/mTOR inhibitors have a promising clinical efficacy theoretically. However, strong drug resistance is developed in GB against the PI3K/AKT/mTOR inhibitors due to the cytoprotective effect and the adaptive response of autophagy during the treatment of GB. Activation of autophagy by the PI3K/AKT/mTOR inhibitors not only enhances treatment sensitivity but also leads to cell survival when drug resistance develops in cancer cells. In this review, we analyze how to increase the antitumor effect of the PI3K/AKT/mTOR inhibitors in GB treatment, which is achieved by various mechanisms, among which targeting autophagy is an important mechanism. We review the dual role of autophagy in both GB therapy and resistance against inhibitors of the PI3K/AKT/mTOR signaling pathway, and further discuss the possibility of using combinations of autophagy and PI3K/AKT/mTOR inhibitors to improve the treatment efficacy for GB. Finally, we provide new perspectives for targeting autophagy in GB therapy.
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Affiliation(s)
- Qin Xia
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Mengchuan Xu
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Pei Zhang
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Liqun Liu
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Xinyi Meng
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Lei Dong
- School of Life Science, Beijing Institute of Technology, Beijing, China
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Roles of aminoacyl-tRNA synthetase-interacting multi-functional proteins in physiology and cancer. Cell Death Dis 2020; 11:579. [PMID: 32709848 PMCID: PMC7382500 DOI: 10.1038/s41419-020-02794-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 12/15/2022]
Abstract
Aminoacyl-tRNA synthetases (ARSs) are an important class of enzymes with an evolutionarily conserved mechanism for protein synthesis. In higher eukaryotic systems, eight ARSs and three ARS-interacting multi-functional proteins (AIMPs) form a multi-tRNA synthetase complex (MSC), which seems to contribute to cellular homeostasis. Of these, AIMPs are generally considered as non-enzyme factors, playing a scaffolding role during MSC assembly. Although the functions of AIMPs are not fully understood, increasing evidence indicates that these scaffold proteins usually exert tumor-suppressive activities. In addition, endothelial monocyte-activating polypeptide II (EMAP II), as a cleavage product of AIMP1, and AIMP2-DX2, as a splice variant of AIMP2 lacking exon 2, also have a pivotal role in regulating tumorigenesis. In this review, we summarize the biological functions of AIMP1, EMAP II, AIMP2, AIMP2-DX2, and AIMP3. Also, we systematically introduce their emerging roles in cancer, aiming to provide new ideas for the treatment of cancer.
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Angiopoietin 2 promotes angiogenesis in tissue-engineered bone and improves repair of bone defects by inducing autophagy. Biomed Pharmacother 2018; 105:932-939. [PMID: 30021387 DOI: 10.1016/j.biopha.2018.06.078] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 06/13/2018] [Accepted: 06/13/2018] [Indexed: 12/26/2022] Open
Abstract
Angiogenesis plays a key role in the repair of large segmental bone defects with tissue-engineered bones. However, there is no effective method of promoting angiogenesis in tissue-engineered bone. Both angiopoietin 2 (Ang2) and autophagy have been shown to be involved in angiogenesis, but their roles in angiogenesis of tissue-engineered bone remains unknown. In this in vivo study, a radius bone defect was created in New Zealand white rabbits, which were then treated by implantation of a hydroxyapatite/collagen scaffold followed by injection of different concentrations of Ang2. Expression of the autophagic modulators microtubule-associated protein 1 light chain 3 (LC3), Beclin-1, and SQSTM1/P62 were measured via western blotting, while the angiogenic modulators VEGF and CD31 were detected by western blotting and immunohistochemistry, respectively. X-ray imaging combined with general observation was used to evaluate bone defect healing. Expression of LC3 -I/LC3-II, Beclin-1, VEGF, and CD31 in the callus area increased and SQSTM1/p62 decreased in a dose-dependent manner with increasing Ang2 concentration. In the group treated with a high concentration of Ang2, the new callus grew well, accompanied by remarkable angiogenesis, leading to good repair of the bone defects. However, in the low concentration of Ang2 group, in spite of the existence of angiogenesis and new bone formation, the bone defects were not repaired. Furthermore, angiogenesis and osteogenesis were both obstructed in the control group. In conclusion, our study demonstrated that a high concentration of Ang2 promoted angiogenesis in tissue-engineered bone and improved repair of bone defects by inducing autophagy.
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