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Qu WQ, Fan JX, Zheng DW, Gu HY, Yu YF, Yan X, Zhao K, Hu ZB, Qi BW, Zhang XZ, Yu AX. Deep-penetration functionalized cuttlefish ink nanoparticles for combating wound infections with synergetic photothermal-immunologic therapy. Biomaterials 2023; 301:122231. [PMID: 37418854 DOI: 10.1016/j.biomaterials.2023.122231] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/09/2023]
Abstract
The challenge of wound infections post-surgery and open trauma caused by multidrug-resistant bacteria poses a constant threat to clinical treatment. As a promising antimicrobial treatment, photothermal therapy can effectively resolve the problem of drug resistance in conventional antibiotic antimicrobial therapy. Here, we report a deep-penetration functionalized cuttlefish ink nanoparticle (CINP) for photothermal and immunological therapy of wound infections. CINP is decorated with zwitterionic polymer (ZP, namely sulfobetaine methacrylate-methacrylate copolymer) to form CINP@ZP nanoparticles. Natural CINP is found to not only exhibit photothermal destruction of methicillin-resistant Staphylococcus aureus (MRSA) and Escherichia coli (E. coli), but also trigger macrophages-related innate immunity and enhance their antibacterial functions. The ZP coating on the surface of CINP enables nanoparticles to penetrate into deeply infected wound environment. In addition, CINP@ZP is further integrated into the thermosensitive Pluronic F127 gel (CINP@ZP-F127). After in situ spraying gel, CINP@ZP-F127 is also documented notable antibacterial effects in mice wound models infected with MRSA and E. coli. Collectively, this approach combining of photothermal therapy with immunotherapy can promote delivery efficiency of nanoparticles to the deep foci of infective wounds, and effectively eliminate wound infections.
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Affiliation(s)
- Wen-Qiang Qu
- Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, PR China
| | - Jin-Xuan Fan
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, 430072, PR China
| | - Di-Wei Zheng
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, 430072, PR China
| | - Hui-Yun Gu
- Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, PR China
| | - Yi-Feng Yu
- Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, PR China
| | - Xiao Yan
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, 430072, PR China
| | - Kai Zhao
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, 430072, PR China
| | - Zhong-Bao Hu
- Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, PR China
| | - Bai-Wen Qi
- Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, PR China
| | - Xian-Zheng Zhang
- Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, PR China; Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, 430072, PR China.
| | - Ai-Xi Yu
- Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, PR China.
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Deng L, Petrek H, Tu MJ, Batra N, Yu AX, Yu AM. Erratum: Author correction to 'Bioengineered miR-124-3p prodrug selectively alters the proteome of human carcinoma cells to control multiple cellular components and lung metastasis in vivo' [Acta Pharmaceutica Sinica B 11 (2021) 3950-3965]. Acta Pharm Sin B 2023; 13:3577-3578. [PMID: 37655312 PMCID: PMC10465936 DOI: 10.1016/j.apsb.2023.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
Abstract
[This corrects the article DOI: 10.1016/j.apsb.2021.07.027.].
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Affiliation(s)
- Linglong Deng
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430072, China
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Hannah Petrek
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Mei-Juan Tu
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Neelu Batra
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Ai-Xi Yu
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430072, China
| | - Ai-Ming Yu
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
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Yu AX, Wang Z, Yi XZ. Regenerative peripheral nerve interface prevents neuroma formation after peripheral nerve transection. Neural Regen Res 2023; 18:814-818. [DOI: 10.4103/1673-5374.353498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Yi WR, Tu MJ, Yu AX, Lin J, Yu AM. Bioengineered miR-34a modulates mitochondrial inner membrane protein 17 like 2 (MPV17L2) expression toward the control of cancer cell mitochondrial functions. Bioengineered 2022; 13:12489-12503. [PMID: 35579419 PMCID: PMC9276019 DOI: 10.1080/21655979.2022.2076399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Genome-derived microRNAs (miRNAs or miRs) control post-transcriptional gene expression critical for various cellular processes. Recently, we have invented a novel platform technology to achieve high-yield production of fully humanized, bioengineered miRNA agents (hBERAs) for research and development. This study is aimed to produce and utilize a new biologic miR-34a-5p (or miR-34a) molecule, namely, hBERA/miR-34a, to delineate the role of miR-34a-5p in the regulation of mitochondrial functions in human carcinoma cells. Bioengineered hBERA/miR-34a was produced through in vivo fermentation production and purified by anion exchange fast protein liquid chromatography. hEBRA/miR-34a was processed to target miR-34a-5p in human osteosarcoma and lung cancer cells, as determined by selective stem-loop reverse transcription quantitative polymerase chain reaction analysis. The mitochondrial inner membrane protein MPV17 like 2 (MPV17L2) was validated as a direct target for miR-34a-5p by dual luciferase reporter assay. Western blot analysis revealed that bioengineered miR-34a-5p effectively reduced MPV17L2 protein outcomes, leading to much lower levels of respiratory chain Complex I activities and intracellular ATP that were determined with specific assay kits. Moreover, Seahorse Mito Stress Test assay was conducted, and the results showed that biologic miR-34a-5p sharply reduced cancer cell mitochondrial respiration capacity, accompanied by a remarkable increase of oxidative stress and elevated apoptotic cell death, which are manifested by greater levels of reactive oxygen species and selective apoptosis biomarkers, respectively. These results demonstrate the presence and involvement of the miR-34a-5p-MPV17L2 pathway in the control of mitochondrial functions in human carcinoma cells and support the utility of novel bioengineered miRNA molecules for functional studies.
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Affiliation(s)
- Wan-Rong Yi
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China.,Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Mei-Juan Tu
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Ai-Xi Yu
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Jun Lin
- Department of Gastroenterology/Hepatology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Ai-Ming Yu
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
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Gu HY, Qu WQ, Peng HH, Yu YF, Jiang ZZ, Qi BW, Yu AX. Stemness Subtypes and Scoring System Predict Prognosis and Efficacy of Immunotherapy in Soft Tissue Sarcoma. Front Immunol 2022; 13:796606. [PMID: 35464409 PMCID: PMC9022121 DOI: 10.3389/fimmu.2022.796606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 03/07/2022] [Indexed: 11/29/2022] Open
Abstract
Tumor stemness has been reported to play important roles in cancers. However, a comprehensive analysis of tumor stemness remains to be performed to investigate the specific mechanisms and practical values of stemness in soft tissue sarcomas (STS). Here, we applied machine learning to muti-omic data of patients from TCGA-SARC and GSE21050 cohorts to reveal important roles of stemness in STS. We demonstrated limited roles of existing mRNAsi in clinical application. Therefore, based on stemness-related signatures (SRSs), we identified three stemness subtypes with distinct stemness, immune, and metabolic characteristics using consensus clustering. The low-stemness subtype had better prognosis, activated innate and adaptive immunity (e.g., infiltrating B, DC, Th1, CD8+ T, activated NK, gamma delta T cells, and M1 macrophages), more enrichment of metabolic pathways, more sites with higher methylation level, higher gene mutations, CNA burdens, and immunogenicity indicators. Furthermore, the 16 SRS-based stemness prognostic index (SPi) was developed, and we found that low-SPi patients with low stemness had better prognosis and other characteristics similar to those in the low-stemness subtype. Besides, low-stemness subtype and low-SPi patients could benefit from immunotherapy. The predictive value of SPi in immunotherapy was more accurate after the addition of MSI into SPi. MSIlowSPilow patients might be more sensitive to immunotherapy. In conclusion, we highlighted mechanisms and practical values of the stemness in STS. We also recommended the combination of MSI and SPi which is a promising tool to predict prognosis and achieve precise treatments of immunotherapy in STS.
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Affiliation(s)
- Hui-Yun Gu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wen-Qiang Qu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Hai-Heng Peng
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yi-Feng Yu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhe-Zhen Jiang
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Bai-Wen Qi
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Ai-Xi Yu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
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Deng L, Petrek H, Tu MJ, Batra N, Yu AX, Yu AM. Bioengineered miR-124-3p prodrug selectively alters the proteome of human carcinoma cells to control multiple cellular components and lung metastasis in vivo. Acta Pharm Sin B 2021; 11:3950-3965. [PMID: 35024318 PMCID: PMC8727917 DOI: 10.1016/j.apsb.2021.07.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 02/07/2023] Open
Abstract
With the understanding of microRNA (miRNA or miR) functions in tumor initiation, progression, and metastasis, efforts are underway to develop new miRNA-based therapies. Very recently, we demonstrated effectiveness of a novel humanized bioengineered miR-124-3p prodrug in controlling spontaneous lung metastasis in mouse models. This study was to investigate the molecular and cellular mechanisms by which miR-124-3p controls tumor metastasis. Proteomics study identified a set of proteins selectively and significantly downregulated by bioengineered miR-124-3p in A549 cells, which were assembled into multiple cellular components critical for metastatic potential. Among them, plectin (PLEC) was verified as a new direct target for miR-124-3p that links cytoskeleton components and junctions. In miR-124-3p-treated lung cancer and osteosarcoma cells, protein levels of vimentin, talin 1 (TLN1), integrin beta-1 (ITGB1), IQ motif containing GTPase activating protein 1 (IQGAP1), cadherin 2 or N-cadherin (CDH2), and junctional adhesion molecule A (F11R or JAMA or JAM1) decreased, causing remodeling of cytoskeletons and disruption of cell-cell junctions. Furthermore, miR-124-3p sharply suppressed the formation of focal adhesion plaques, leading to reduced cell adhesion capacity. Additionally, efficacy and safety of biologic miR-124-3p therapy was established in an aggressive experimental metastasis mouse model in vivo. These results connect miR-124-3p-PLEC signaling to other elements in the control of cytoskeleton, cell junctions, and adhesion essential for cancer cell invasion and extravasation towards metastasis, and support the promise of miR-124 therapy.
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Affiliation(s)
- Linglong Deng
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430072, China
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Hannah Petrek
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Mei-Juan Tu
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Neelu Batra
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Ai-Xi Yu
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430072, China
| | - Ai-Ming Yu
- Department of Biochemistry and Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
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Choi YH, Zhang C, Liu Z, Tu MJ, Yu AX, Yu AM. A Novel Integrated Pharmacokinetic-Pharmacodynamic Model to Evaluate Combination Therapy and Determine In Vivo Synergism. J Pharmacol Exp Ther 2021; 377:305-315. [PMID: 33712506 PMCID: PMC8140393 DOI: 10.1124/jpet.121.000584] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 03/09/2021] [Indexed: 11/22/2022] Open
Abstract
Understanding pharmacokinetic (PK)-pharmacodynamic (PD) relationships is essential in translational research. Existing PK-PD models for combination therapy lack consideration of quantitative contributions from individual drugs, whereas interaction factor is always assigned arbitrarily to one drug and overstretched for the determination of in vivo pharmacologic synergism. Herein, we report a novel generic PK-PD model for combination therapy by considering apparent contributions from individual drugs coadministered. Doxorubicin (Dox) and sorafenib (Sor) were used as model drugs whose PK data were obtained in mice and fit to two-compartment model. Xenograft tumor growth was biphasic in mice, and PD responses were described by three-compartment transit models. This PK-PD model revealed that Sor (contribution factor = 1.62) had much greater influence on overall tumor-growth inhibition than coadministered Dox (contribution factor = 0.644), which explains the mysterious clinical findings on remarkable benefits for patients with cancer when adding Sor to Dox treatment, whereas there were none when adding Dox to Sor therapy. Furthermore, the combination index method was integrated into this predictive PK-PD model for critical determination of in vivo pharmacologic synergism that cannot be correctly defined by the interaction factor in conventional models. In addition, this new PK-PD model was able to identify optimal dosage combination (e.g., doubling experimental Sor dose and reducing Dox dose by 50%) toward much greater degree of tumor-growth inhibition (>90%), which was consistent with stronger synergy (combination index = 0.298). These findings demonstrated the utilities of this new PK-PD model and reiterated the use of valid method for the assessment of in vivo synergism. SIGNIFICANCE STATEMENT: A novel pharmacokinetic (PK)-pharmacodynamic (PD) model was developed for the assessment of combination treatment by considering contributions from individual drugs, and combination index method was incorporated to critically define in vivo synergism. A greater contribution from sorafenib to tumor-growth inhibition than that of coadministered doxorubicin was identified, offering explanation for previously inexplicable clinical observations. This PK-PD model and strategy shall have broad applications to translational research on identifying optimal dosage combinations with stronger synergy toward improved therapeutic outcomes.
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Affiliation(s)
- Young Hee Choi
- Department of Biochemistry and Molecular Medicine, University of California (UC) Davis School of Medicine, Sacramento, California (Y.H.C., C.Z., Z.L., M.-J.T., A.-M.Y.); College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggi-do, Republic of Korea (Y.H.C.); and Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (A.-X.Y.)
| | - Chao Zhang
- Department of Biochemistry and Molecular Medicine, University of California (UC) Davis School of Medicine, Sacramento, California (Y.H.C., C.Z., Z.L., M.-J.T., A.-M.Y.); College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggi-do, Republic of Korea (Y.H.C.); and Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (A.-X.Y.)
| | - Zhenzhen Liu
- Department of Biochemistry and Molecular Medicine, University of California (UC) Davis School of Medicine, Sacramento, California (Y.H.C., C.Z., Z.L., M.-J.T., A.-M.Y.); College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggi-do, Republic of Korea (Y.H.C.); and Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (A.-X.Y.)
| | - Mei-Juan Tu
- Department of Biochemistry and Molecular Medicine, University of California (UC) Davis School of Medicine, Sacramento, California (Y.H.C., C.Z., Z.L., M.-J.T., A.-M.Y.); College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggi-do, Republic of Korea (Y.H.C.); and Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (A.-X.Y.)
| | - Ai-Xi Yu
- Department of Biochemistry and Molecular Medicine, University of California (UC) Davis School of Medicine, Sacramento, California (Y.H.C., C.Z., Z.L., M.-J.T., A.-M.Y.); College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggi-do, Republic of Korea (Y.H.C.); and Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (A.-X.Y.)
| | - Ai-Ming Yu
- Department of Biochemistry and Molecular Medicine, University of California (UC) Davis School of Medicine, Sacramento, California (Y.H.C., C.Z., Z.L., M.-J.T., A.-M.Y.); College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyonggi-do, Republic of Korea (Y.H.C.); and Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (A.-X.Y.)
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Li PC, Tu MJ, Ho PY, Batra N, Tran MM, Qiu JX, Wun T, Lara PN, Hu X, Yu AX, Yu AM. In vivo fermentation production of humanized noncoding RNAs carrying payload miRNAs for targeted anticancer therapy. Am J Cancer Res 2021; 11:4858-4871. [PMID: 33754032 PMCID: PMC7978307 DOI: 10.7150/thno.56596] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 01/17/2021] [Indexed: 12/19/2022] Open
Abstract
Rationale: Noncoding RNAs (ncRNAs) such as microRNAs (miRs or miRNAs) play important roles in the control of cellular processes through posttranscriptional gene regulation. However, ncRNA research is limited to utilizing RNA agents synthesized in vitro. Recombinant RNAs produced and folded in living cells shall better recapitulate biologic RNAs. Methods: Herein, we developed a novel platform for in vivo fermentation production of humanized recombinant ncRNA molecules, namely hBERAs, carrying payload miRNAs or siRNAs. Target hBERAs were purified by anion exchange FPLC method. Functions of hBERA/miRNAs were investigated in human carcinoma cells and antitumor activities were determined in orthotopic osteosarcoma xenograft spontaneous lung metastasis mouse models. Results: Proper human tRNAs were identified to couple with optimal hsa-pre-miR-34a as new fully-humanized ncRNA carriers to accommodate warhead miRNAs or siRNAs. A group of 30 target hBERAs were all heterogeneously overexpressed (each accounting for >40% of total bacterial RNA), which facilitated large-scale production (8-31 mg of individual hBERAs from 1L bacterial culture). Model hBERA/miR-34a-5p and miR-124-3p were selectively processed to warhead miRNAs in human carcinoma cells to modulate target gene expression, enhance apoptosis and inhibit invasiveness. In addition, bioengineered miR-34a-5p and miR-124-3p agents both reduced orthotopic osteosarcoma xenograft tumor growth and spontaneous pulmonary metastases significantly. Conclusion: This novel ncRNA bioengineering technology and resulting recombinant ncRNAs are unique additions to conventional technologies and tools for basic research and drug development.
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Tang PF, Hou ZY, Wu XB, Zhang CQ, Wang JW, Xing X, Shao ZW, Yu AX, Wang G, Chen B, Zhang P, Hu YJ, Wang BW, Guo XD, Tang X, Zhou DS, Liu F, Chen AM, Zhang K, Li KN, Zhu YB. Expert consensus on management principles of orthopedic emergency in the epidemic of coronavirus disease 2019. Chin Med J (Engl) 2020; 133:1096-1098. [PMID: 32358326 PMCID: PMC7213622 DOI: 10.1097/cm9.0000000000000810] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Pei-Fu Tang
- Department of Orthopedics, Department of Orthopedics, The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
| | - Zhi-Yong Hou
- Emergency Center of Trauma, Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, China
| | - Xin-Bao Wu
- Department of Traumatology and Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Chang-Qing Zhang
- Department of Orthopedics, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200233, China
| | - Jun-Wen Wang
- Department of Orthopedics, Wuhan Fourth Hospital, Wuhan, Hubei 430034, China
| | - Xin Xing
- Emergency Center of Trauma, Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, China
| | - Zeng-Wu Shao
- Department of Orthopedics, Union Hospital Tongji Medical College Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Ai-Xi Yu
- Department of Trauma Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China
| | - Gang Wang
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Bin Chen
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Ping Zhang
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Yan-Jun Hu
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Bo-Wei Wang
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Xiao-Dong Guo
- Department of Orthopedics, Union Hospital Tongji Medical College Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Xin Tang
- Department of Orthopedics, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, China
| | - Dong-Sheng Zhou
- Department of Orthopedics, Shandong Provincial Hospital, Jinan, Shandong 25002, China
| | - Fan Liu
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, China
| | - Ai-Mi Chen
- Department of Orthopedics, Changzheng Hospital Affiliated to Naval Military Medical University, Shanghai 200003, China
| | - Kun Zhang
- Department of Orthopedics, Honghui Hospital Affiliated to Medical College of Xi'an Jiaotong University, Xi'an Shaanxi 710054, China
| | - Kai-Nan Li
- Department of Orthopedics, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610081, China
| | - Yan-Bin Zhu
- Emergency Center of Trauma, Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, China
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Tu MJ, Yi WY, Liu Z, Zhang C, Yu AX, Yu AM. Bioengineered miR‐328‐3p modulates SLC2A1/GLUT1‐mediated glucose uptake and metabolism to exert synergistic antiproliferative effects with chemotherapeutics. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.03668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Ai-Xi Yu
- Zhongnan Hospital of Wuhan University
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Li DF, Yuan Y, Tu MJ, Hu X, Li YZ, Yi WR, Li PC, Zhao Y, Cheng Z, Yu AM, Jian C, Yu AX. The Optimal Outcome of Suppressing Ewing Sarcoma Growth in vivo With Biocompatible Bioengineered miR-34a-5p Prodrug. Front Oncol 2020; 10:222. [PMID: 32161722 PMCID: PMC7052494 DOI: 10.3389/fonc.2020.00222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 02/10/2020] [Indexed: 12/31/2022] Open
Abstract
Being the second most common type of primary bone malignancy in children and adolescents, Ewing Sarcoma (ES) encounters the dilemma of low survival rate with a lack of effective treatments. As an emerging approach to combat cancer, RNA therapeutics may expand the range of druggable targets. Since the genome-derived oncolytic microRNA-34a (miR-34a) is down-regulated in ES, restoration of miR-34a-5p expression or function represents a new therapeutic strategy which is, however, limited to the use of chemically-engineered miRNA mimics. Very recently we have developed a novel bioengineering technology using a stable non-coding RNA carrier (nCAR) to achieve high-yield production of biocompatible miRNA prodrugs, which is a great addition to current tools for the assessment of RNA therapeutics. Herein, for the first time, we investigated the biochemical pharmacology of bioengineered miR-34a-5p prodrug (nCAR/miR-34a-5p) in the control of ES using human ES cells and xenograft mouse models. The bioengineered nCAR/miR-34a-5p was precisely processed to mature miR-34a-5p in ES cells and subsequently suppressed cell proliferation, attributable to the enhancement of apoptosis and induction of G2 cell cycle arrest through downregulation of SIRT-1, BCL-2 and CDK6 protein levels. Furthermore, systemic administration of nCAR/miR-34a-5p dramatically suppressed the ES xenograft tumor growth in vivo while showing biocompatibility. In addition, the antitumor effect of bioengineered nCAR/miR-34a-5p was associated with a lower degree of tumoral cell proliferation and greater extent of apoptosis. These findings demonstrate the efficacy of bioengineered miR-34a-5p prodrug for the treatment of ES and support the development of miRNA therapeutics using biocompatible bioengineered miRNA prodrugs.
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Affiliation(s)
- Dai-Feng Li
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China.,Molecular Imaging Program at Stanford (MIPS), Bio-X Program, Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University, Stanford, CA, United States
| | - Ying Yuan
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Mei-Juan Tu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, United States
| | - Xiang Hu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yi-Zhou Li
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wan-Rong Yi
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Peng-Cheng Li
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yong Zhao
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhen Cheng
- Molecular Imaging Program at Stanford (MIPS), Bio-X Program, Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University, Stanford, CA, United States
| | - Ai-Ming Yu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, United States
| | - Chao Jian
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Ai-Xi Yu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
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Yi W, Tu MJ, Liu Z, Zhang C, Batra N, Yu AX, Yu AM. Bioengineered miR-328-3p modulates GLUT1-mediated glucose uptake and metabolism to exert synergistic antiproliferative effects with chemotherapeutics. Acta Pharm Sin B 2020; 10:159-170. [PMID: 31993313 PMCID: PMC6976971 DOI: 10.1016/j.apsb.2019.11.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/16/2019] [Accepted: 10/31/2019] [Indexed: 12/15/2022] Open
Abstract
MicroRNAs (miRNAs or miRs) are small noncoding RNAs derived from genome to control target gene expression. Recently we have developed a novel platform permitting high-yield production of bioengineered miRNA agents (BERA). This study is to produce and utilize novel fully-humanized BERA/miR-328-3p molecule (hBERA/miR-328) to delineate the role of miR-328-3p in controlling nutrient uptake essential for cell metabolism. We first demonstrated successful high-level expression of hBERA/miR-328 in bacteria and purification to high degree of homogeneity (>98%). Biologic miR-328-3p prodrug was selectively processed to miR-328-3p to suppress the growth of highly-proliferative human osteosarcoma (OS) cells. Besides glucose transporter protein type 1, gene symbol solute carrier family 2 member 1 (GLUT1/SLC2A1), we identified and verified large neutral amino acid transporter 1, gene symbol solute carrier family 7 member 5 (LAT1/SLC7A5) as a direct target for miR-328-3p. While reduction of LAT1 protein levels by miR-328-3p did not alter homeostasis of amino acids within OS cells, suppression of GLUT1 led to a significantly lower glucose uptake and decline in intracellular levels of glucose and glycolytic metabolite lactate. Moreover, combination treatment with hBERA/miR-328 and cisplatin or doxorubicin exerted a strong synergism in the inhibition of OS cell proliferation. These findings support the utility of novel bioengineered RNA molecules and establish an important role of miR-328-3p in the control of nutrient transport and homeostasis behind cancer metabolism.
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Key Words
- 2-NBDG, 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl) amino]-2-deoxyglucose
- ABCG2, ATP-binding cassette subfamily G member 2
- ACN, acetonitrile
- Au/Uv, absorbance unit of ultraviolet-visible spectroscopy
- BCRP, breast cancer resistant protein
- BERA, bioengineered miRNA agent
- Bioengineered RNA
- CI, combination index
- CPT, cisplatin
- Cancer
- Chemosensitivity
- DOX, doxorubicin
- E. coli, Escherichia coli
- ESI, electrospray ionization
- FPLC, fast protein liquid chromatography
- Fa, fraction affected
- GLUT1
- GLUT1, glucose transporter protein type 1
- HCC, hepatocellular carcinoma
- HPLC, high-performance liquid chromatography
- IS, internal standard
- KRB, Krebs–Ringer bicarbonate
- LAT1
- LAT1, large neutral amino acid transporter 1
- LC–MS/MS, liquid chromatography–tandem mass spectroscopy
- MCT4, monocarboxylate transporter 4
- MRE, miRNA response elements
- MRM, multiple reaction monitoring
- MiR-328
- OS, osteosarcoma
- PAGE, polyacrylamide gel electrophoresis
- PTEN, phosphatase and tensin homolog
- PVDF, Polyvinylidene fluoride
- RAGE, receptor for advanced glycosylation end products
- RT-qPCR, reverse transcription quantitative real-time polymerase chain reaction
- SLC2A1, 7A5, 16A3, solute carrier family 2 member 1, family 7 member 5, family 16 member 3
- WT, wild type
- hBERA, humanized bioengineered miRNA agent
- hsa, Homo sapiens
- htRNASer, human seryl-tRNA
- mTOR, mammalian target of rapamycin
- miR or miRNA, microRNA
- ncRNA, noncoding RNAs
- nt, nucleotide
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Affiliation(s)
- Wanrong Yi
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430072, China
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento 95817, CA, USA
| | - Mei-Juan Tu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento 95817, CA, USA
| | - Zhenzhen Liu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento 95817, CA, USA
| | - Chao Zhang
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento 95817, CA, USA
| | - Neelu Batra
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento 95817, CA, USA
| | - Ai-Xi Yu
- Department of Orthopaedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430072, China
| | - Ai-Ming Yu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento 95817, CA, USA
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Jian C, Tu MJ, Ho PY, Duan Z, Zhang Q, Qiu JX, DeVere White RW, Wun T, Lara PN, Lam KS, Yu AX, Yu AM. Co-targeting of DNA, RNA, and protein molecules provides optimal outcomes for treating osteosarcoma and pulmonary metastasis in spontaneous and experimental metastasis mouse models. Oncotarget 2018; 8:30742-30755. [PMID: 28415566 PMCID: PMC5458164 DOI: 10.18632/oncotarget.16372] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 03/03/2017] [Indexed: 11/30/2022] Open
Abstract
Metastasis is a major cause of mortality for cancer patients and remains as the greatest challenge in cancer therapy. Driven by multiple factors, metastasis may not be controlled by the inhibition of single target. This study was aimed at assessing the hypothesis that drugs could be rationally combined to co-target critical DNA, RNA and protein molecules to achieve saturation attack against metastasis. Independent actions of the model drugs DNA-intercalating doxorubicin, RNA-interfering miR-34a and protein-inhibiting sorafenib on DNA replication, RNA translation and protein kinase signaling in highly metastatic, human osteosarcoma 143B cells were demonstrated by the increase of? H2A.X foci formation, reduction of c-MET expression and inhibition of Erk1/2 phosphorylation, respectively, and optimal effects were found for triple-drug combination. Consequently, triple-drug treatment showed a strong synergism in suppressing 143B cell proliferation and the greatest effects in reducing cell invasion. Compared to single- and dual-drug treatment, triple-drug therapy suppressed pulmonary metastases and orthotopic osteosarcoma progression to significantly greater degrees in orthotopic osteosarcoma xenograft/spontaneous metastases mouse models, while none showed significant toxicity. In addition, triple-drug therapy improved the overall survival to the greatest extent in experimental metastases mouse models. These findings demonstrate co-targeting of DNA, RNA and protein molecules as a novel therapeutic strategy for the treatment of metastasis.
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Affiliation(s)
- Chao Jian
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China.,Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Mei-Juan Tu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Pui Yan Ho
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Zhijian Duan
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Qianyu Zhang
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Jing-Xin Qiu
- Department of Pathology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | | | - Theodore Wun
- Division of Hematology Oncology, UC Davis School of Medicine, Sacramento, CA, USA
| | - Primo N Lara
- Division of Hematology Oncology, UC Davis School of Medicine, Sacramento, CA, USA.,Department of Internal Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, CA, USA
| | - Kit S Lam
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Ai-Xi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Ai-Ming Yu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA, USA
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Zhao Y, Liu JG, Chen WM, Yu AX. Efficacy of thermosensitive chitosan/β-glycerophosphate hydrogel loaded with β-cyclodextrin-curcumin for the treatment of cutaneous wound infection in rats. Exp Ther Med 2017; 15:1304-1313. [PMID: 29434717 PMCID: PMC5776171 DOI: 10.3892/etm.2017.5552] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 11/22/2017] [Indexed: 01/01/2023] Open
Abstract
Wound infection has been a persistent problem that is common and costly. Thermosensitive hydrogel has been demonstrated to be a suitable dressing candidate due to its high moldability, easy administration and ability to maintain a moist topical environment at the wound bed. In the present study, a novel thermosensitive hydrogel was successfully prepared and characterized to have a porous inner structure and a sustained curcumin-releasing profile. The wound healing ability of the hydrogel was investigated in a wound infection model in rats. On analysis, it was observed that the hydrogel complex-dressed wounds exhibited a faster wound closure rate compared with gauze-covered wounds, which was paralleled with improved histological outcomes that were observed. Additionally, the results of in vitro antimicrobial, anti-oxidant, western blot analysis and reverse transcription-quantitative polymerase chain reaction assays indicated that the hydrogel complex had distinct anti-oxidative, antimicrobial and anti-nuclear factor-κB-signaling capacities. These results suggest that this novel hydrogel may be a suitable candidate for facilitating the healing of infected cutaneous wounds in rats.
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Affiliation(s)
- Yong Zhao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Jia-Guo Liu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China.,Department of Orthopedics, Hubei University of Medicine Affiliated Taihe Hospital, Shiyan, Hubei 442000, P.R. China
| | - Wei-Min Chen
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Ai-Xi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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Li PC, Tu MJ, Ho PY, Jilek JL, Duan Z, Zhang QY, Yu AX, Yu AM. Bioengineered NRF2-siRNA Is Effective to Interfere with NRF2 Pathways and Improve Chemosensitivity of Human Cancer Cells. Drug Metab Dispos 2017; 46:2-10. [PMID: 29061583 DOI: 10.1124/dmd.117.078741] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 10/18/2017] [Indexed: 12/28/2022] Open
Abstract
The nuclear factor (erythroid-derived 2)-like 2 (NRF2) is a transcription factor in the regulation of many oxidative enzymes and efflux transporters critical for oxidative stress and cellular defense against xenobiotics. NRF2 is dysregulated in patient osteosarcoma (OS) tissues and correlates with therapeutic outcomes. Nevertheless, research on the NRF2 regulatory pathways and its potential as a therapeutic target is limited to the use of synthetic small interfering RNA (siRNA) carrying extensive artificial modifications. Herein, we report successful high-level expression of recombinant siRNA against NRF2 in Escherichia coli using our newly established noncoding RNA bioengineering technology, which was purified to >99% homogeneity using an anion-exchange fast protein liquid chromatography method. Bioengineered NRF2-siRNA was able to significantly knock down NRF2 mRNA and protein levels in human OS 143B and MG63 cells, and subsequently suppressed the expression of NRF2-regulated oxidative enzymes [heme oxygenase-1 and NAD(P)H:quinone oxidoreductase 1] and elevated intracellular levels of reactive oxygen species. In addition, recombinant NRF2-siRNA was effective to sensitize both 143B and MG63 cells to doxorubicin, cisplatin, and sorafenib, which was associated with significant downregulation of NRF2-targeted ATP-binding cassette (ABC) efflux transporters (ABCC3, ABCC4, and ABCG2). These findings support that targeting NRF2 signaling pathways may improve the sensitivity of cancer cells to chemotherapy, and bioengineered siRNA molecules should be added to current tools for related research.
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Affiliation(s)
- Peng-Cheng Li
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
| | - Mei-Juan Tu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
| | - Pui Yan Ho
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
| | - Joseph L Jilek
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
| | - Zhijian Duan
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
| | - Qian-Yu Zhang
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
| | - Ai-Xi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
| | - Ai-Ming Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (P.-C.L., A.-X.Y.) and Department of Biochemistry and Molecular Medicine, Comprehensive Cancer Center, UC Davis School of Medicine, Sacramento, California (P.-C.L., M.-J.T., P.Y.H., J.L.J., Z.D., Q.-Y.Z., A.-M.Y.)
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Liu DC, Zheng X, Zho Y, Yi WR, Li ZH, Hu X, Yu AX. HIF-1α inhibits IDH-1 expression in osteosarcoma. Oncol Rep 2017; 38:336-342. [DOI: 10.3892/or.2017.5655] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 11/16/2016] [Indexed: 11/05/2022] Open
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Yi WR, Li ZH, Qi BW, Ernest MER, Hu X, Yu AX. Downregulation of IDH2 exacerbates the malignant progression of osteosarcoma cells via increased NF-κB and MMP-9 activation. Oncol Rep 2016; 35:2277-85. [PMID: 26782630 DOI: 10.3892/or.2016.4553] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 11/26/2015] [Indexed: 11/06/2022] Open
Abstract
Isocitrate dehydrogenase 2 (IDH2) is a mitochondrial NADP-dependent isocitrate dehydrogenase. It is considered to be a novel tumor suppressor in several types of tumors. However, the role and related mechanism of IDH2 in osteosarcoma remain unknown. The expression and significance of IDH2 were investigated by immunohistochemistry in formalin-fixed paraffin sections from 44 osteosarcoma patients. IDH2 was downregulated via lentiviral vector‑mediated RNA interference (RNAi) in the Saos-2 and MG-63 human osteosarcoma cell lines. The effect of IDH2 downregulation on human osteosarcoma was studied in vitro by MTT, flow cytometry and invasion assays. Nuclear factor-κB (NF-κB) and matrix metalloproteinase-9 (MMP-9) assays were also used to study the likely molecular mechanism of IDH2 downregulation on the malignant progression of osteosarcoma cells. The results revealed that the expression of IDH2 was inversely correlated with pathological grade and metastasis in osteosarcoma. IDH2 downregulation promoted a pro-proliferative effect on the Saos-2 and MG-63 osteosarcoma cell lines. IDH2 downregulation accelerated cell cycle progression from S to G2/M phase. The pro-proliferative effect induced by IDH2 downregulation may be ascribed to increased NF-κB activity via IκBα phosphorylation. The invasive activity of osteosarcoma cells was also significantly promoted by IDH2 downregulation and may result from elevated MMP-9 activity. In conclusion, IDH2 downregulation may exacerbate malignant progression via increased NF-κB and MMP-9 activity and may implicate the potential biological importance of IDH2 targeting in osteosarcoma cells. Downregulation of IDH2 exacerbates the malignant progression of osteosarcoma cells via increased NF-κB and MMP-9 activation.
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Affiliation(s)
- Wan-Rong Yi
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Zong-Huan Li
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Bai-Wen Qi
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Mendame Ehya Regis Ernest
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Xiang Hu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Ai-Xi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, P.R. China
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Zhao Y, Tu MJ, Yu YF, Wang WP, Chen QX, Qiu JX, Yu AX, Yu AM. Combination therapy with bioengineered miR-34a prodrug and doxorubicin synergistically suppresses osteosarcoma growth. Biochem Pharmacol 2015; 98:602-13. [PMID: 26518752 PMCID: PMC4725324 DOI: 10.1016/j.bcp.2015.10.015] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 10/21/2015] [Indexed: 01/07/2023]
Abstract
Osteosarcoma (OS) is the most common form of primary malignant bone tumor and prevalent among children and young adults. Recently we have established a novel approach to bioengineering large quantity of microRNA-34a (miR-34a) prodrug for miRNA replacement therapy. This study is to evaluate combination treatment with miR-34a prodrug and doxorubicin, which may synergistically suppress human OS cell growth via RNA interference and DNA intercalation. Synergistic effects were indeed obvious between miR-34a prodrug and doxorubicin for the suppression of OS cell proliferation, as defined by Chou-Talalay method. The strongest antiproliferative synergism was achieved when both agents were administered simultaneously to the cells at early stage, which was associated with much greater degrees of late apoptosis, necrosis, and G2 cell cycle arrest. Alteration of OS cellular processes and invasion capacity was linked to the reduction of protein levels of miR-34a targeted (proto-)oncogenes including SIRT1, c-MET, and CDK6. Moreover, orthotopic OS xenograft tumor growth was repressed to a significantly greater degree in mouse models when miR-34a prodrug and doxorubicin were co-administered intravenously. In addition, multiple doses of miR-34a prodrug and doxorubicin had no or minimal effects on mouse blood chemistry profiles. The results demonstrate that combination of doxorubicin chemotherapy and miR-34a replacement therapy produces synergistic antiproliferative effects and it is more effective than monotherapy in suppressing OS xenograft tumor growth. These findings support the development of mechanism-based combination therapy to combat OS and bioengineered miR-34a prodrug represents a new natural miRNA agent.
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Affiliation(s)
- Yong Zhao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430070, China; Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Mei-Juan Tu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Yi-Feng Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430070, China
| | - Wei-Peng Wang
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Qiu-Xia Chen
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA
| | - Jing-Xin Qiu
- Department of Pathology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Ai-Xi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430070, China.
| | - Ai-Ming Yu
- Department of Biochemistry & Molecular Medicine, UC Davis School of Medicine, Sacramento, CA 95817, USA.
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Song J, Yu AX, Li ZH. Comparison of conservative and operative treatment for distal radius fracture: a meta-analysis of randomized controlled trials. Int J Clin Exp Med 2015; 8:17023-17035. [PMID: 26770293 PMCID: PMC4694193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 09/23/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND The authors conducted a meta-analysis to compare the effectiveness and safety of conservative and operative treatment for distal radius fracture. METHODS PubMed, EMBASE, and the Cochrane Library were searched to identify the relevant studies published up to February of 2015. All randomized controlled trials published to compare the conservative and operative treatment were included in the study. Results were pooled using meta-analysis to compare the efficacy and safety of conservative and operative treatment for distal radius fracture. RESULTS The databases were derived from seven qualified studies that included a total of 523 patients in which 269 cases adopted conservative treatment while 253 cases adopted operative treatment. Overall, compared with the conservative treatment- treated the distal radius fracture, operative therapies resulted in significantly better radiographic (P<0.05), however, no significant differences of the functional outcomes and complication rate were observed between the two methods (P>0.05). CONCLUSION Surgical treatment seems to be more effective distal radius fracture compared with conservative treatment when the radiographic outcomes were analyzed, and no significant differences were deteched in the functional outcomes and complication rate.
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Affiliation(s)
- Jian Song
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University Wuhan 430071, China
| | - Ai-Xi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University Wuhan 430071, China
| | - Zong-Huan Li
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan University Wuhan 430071, China
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Xiao WD, Yu AX, Liu DL. Fasudil hydrochloride could promote axonal growth through inhibiting the activity of ROCK. Int J Clin Exp Pathol 2014; 7:5564-5568. [PMID: 25337198 PMCID: PMC4203169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 08/23/2014] [Indexed: 06/04/2023]
Abstract
OBJECTIVE This study aims to investigate the neuroprotective effect of Rho kinase inhibitor fasudil hydrochloride in ischemia/reperfusion injury N2a neuron. METHODS In vitro, N2a cells induced by ischemia and ischemia-reperfusion were treated with fasudil hydrochloride, cell damage was analyzed by MTT. On the other hand, the cytoskeleton of N2a cells was scanned through immunofluorescence techniques by Confocal Laser Microscopy which stained with FITC-phalloidin for F-actin visualization. RESULTS The activation of ROCK-II increased significantly in the damaged local during the following phase of ischemia/reperfusion injury. Ischemia induced a striking reorganization of actin cytoskeleton with a weakening of fluorescent intensity of the peripheral filament actin bands and formation of the long and thick stress fibers, but pretreatment of Fasudil hydrochloride could reversed the changes of ultra-structure on the cellular surface. MTT assay showed that Fasudil hydrochloride could prolong the survival time of the N2a cells after mimic ischemia-reperfusion for 24 h. CONCLUSIONS The activation of ROCK-II has an exceptional hoist after ischemia/reperfusion injury, it is likely to induce the collapse of the growth cone through MLC-P. Fasudil hydrochloride could promote axonal growth on inhibitory of ROCK activity.
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Affiliation(s)
- Wei-Dong Xiao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University Wuhan 430071, Hubei, P. R. China
| | - Ai-Xi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University Wuhan 430071, Hubei, P. R. China
| | - Dan-Li Liu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University Wuhan 430071, Hubei, P. R. China
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Xia CY, Yu AX, Qi B, Zhou M, Li ZH, Wang WY. Analysis of blood flow and local expression of angiogenesis‑associated growth factors in infected wounds treated with negative pressure wound therapy. Mol Med Rep 2014; 9:1749-54. [PMID: 24584462 DOI: 10.3892/mmr.2014.1997] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 02/19/2014] [Indexed: 11/06/2022] Open
Abstract
Angiogenesis is involved in the wound healing process. Increased angiogenesis and blood flow constitute a major mechanism of negative pressure wound therapy (NPWT), which has been shown to facilitate the healing of infected wounds. However, the effect on the expression of angiogensis‑related growth factor remains unknown. The goal of the current study was to investigate the angiogenic factor levels prior to and following NPWT in infected wounds. A total of 20 patients with infected wounds treated with NPWT were included in the study. Patients acted as their own control; the postoperative measurements of patients were considered as the experimental group, while preoperative measurements were considered as the controlled group. Blood flow was recorded prior to and during NPWT. A total of 10 angiogensis‑related growth factors were detected using a protein biochip array to analyze the change in protein levels prior to NPWT, and on the third day during NPWT. All wounds were successfully reconstructed by skin grafting or using local flaps following NPWT. NPWT resulted in significantly increased blood flow in the wound. There was a significant increase in vascular endothelial growth factor (VEGF), EGF, platelet‑derived growth factor and angiotesin‑2 following NPWT, while basic fibroblast growth factor decreased significantly. NPWT affects the local expression of angiogenesis‑associated growth factors, which represents another mechanism to explain how NPWT accelerates wound healing.
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Affiliation(s)
- Cheng-Yan Xia
- Department of Micro‑Orthopaedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Ai-Xi Yu
- Department of Micro‑Orthopaedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Baiwen Qi
- Department of Micro‑Orthopaedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Min Zhou
- Department of Micro‑Orthopaedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Zong-Huan Li
- Department of Micro‑Orthopaedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Wei-Yang Wang
- Department of Micro‑Orthopaedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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Wang W, Pan Z, Hu X, Li Z, Zhao Y, Yu AX. Vacuum-assisted closure increases ICAM-1, MIF, VEGF and collagen I expression in wound therapy. Exp Ther Med 2014; 7:1221-1226. [PMID: 24940415 PMCID: PMC3991501 DOI: 10.3892/etm.2014.1567] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 02/04/2014] [Indexed: 12/13/2022] Open
Abstract
Severe traumatic wounds are challenging to manage during surgery. The introduction of vacuum-assisted closure (VAC) is a breakthrough in wound management. The aim of the present study was to investigate the effect of VAC on cytokines in wounds during the management of severe traumatic wounds following initial debridement. VAC and conventional wound care (CWC) were independently applied to severe traumatic wounds on pigs. The expression levels of intercellular adhesion molecule-1 (ICAM-1), migration inhibitory factor (MIF), vascular endothelial growth factor (VEGF), basic fibroblast growth factor, collagen I and human fibroblast collagenase 1 were detected by quantitative polymerase chain reaction and western blotting. VAC significantly increased the expression of ICAM-1, MIF, VEGF and collagen I compared with that induced by CWC at the protein and mRNA levels. Therefore, the results of the present study indicate that VAC therapy is an effective method for treating severe traumatic wounds, as it increases the expression of cytokines in wounds. VAC significantly increases the expression of ICAM-1, MIF, VEGF and collagen I to manage severe traumatic wounds.
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Affiliation(s)
- Weiyang Wang
- Department of Micro-Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Zhenyu Pan
- Department of Micro-Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Xiang Hu
- Department of Micro-Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Zonghuan Li
- Department of Micro-Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Yong Zhao
- Department of Micro-Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Ai-Xi Yu
- Department of Micro-Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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Li ZH, Yu AX, Guo XP, Qi BW, Zhou M, Wang WY. Absorbable implants versus metal implants for the treatment of ankle fractures: A meta-analysis. Exp Ther Med 2013; 5:1531-1537. [PMID: 23737914 PMCID: PMC3671805 DOI: 10.3892/etm.2013.1017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 03/14/2013] [Indexed: 11/11/2022] Open
Abstract
This meta-analysis was performed to evaluate the efficiency and the safety of absorbable implants. Five major electronic databases (PubMed, Embase, Cochrane Library, SinoMed and Wanfang Data) were systematically searched for randomized controlled trials (RCTs) from their establishment to November 2012. Studies on absorbable implants and metal implants for ankle fractures were selected. The meta-analysis was performed using RevMan 5.1. Ten studies with 762 patients were included and analyzed. Compared with metal implants, absorbable implants used for the internal fixation of ankle fractures produce similar radiographic and functional outcomes (P= 0.52). Normally, removal of the internal fixation is unnecessary (P<0.0001) and the incidence of palpable implants is lower (P=0.02) for absorbable implants. No statistically significant difference was observed between the two groups with regard to foreign body reactions (P=0.07), infection (P= 0.69), osteoarthritis (P= 0.39), pain (P= 0.06), refracture (P=0.67), skin necrosis (P=0.99), deep vein thrombosis (P=0.21) and nerve injury (P=0.94). Absorbable implants used in ankle fractures rarely require reoperation and result in similar functional outcomes and complications compared with metal implants. These characteristics make them efficient and reasonably safe for the treatment of ankle fractures.
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Affiliation(s)
- Zong-Huan Li
- Department of Micro-Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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Hu X, Yu AX, Qi BW, Fu T, Wu G, Zhou M, Luo J, Xu JH. The expression and significance of IDH1 and p53 in osteosarcoma. J Exp Clin Cancer Res 2010; 29:43. [PMID: 20459648 PMCID: PMC2873426 DOI: 10.1186/1756-9966-29-43] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Accepted: 05/07/2010] [Indexed: 02/01/2023]
Abstract
Background To detect the expression of isocitrate dehydrogenase 1 (IDH1) and transformation-related protein 53 (p53) in osteosarcoma and analyze the correlation between them and the clinico-pathological features. Methods The expressions of IDH1 and p53 were detected in human osteosarcoma cell lines (MG-63 and U2OS) by immunocytochemistry, Real-time PCR and Western Blotting. The expressions of IDH1 and p53 in formalin-fixed paraffin-embedded tissue sections from 44 osteosarcoma patients were determined by immunohistochemistry, and the correlation between them and clinicopagthological features were analyzed. None of these patients received chemotherapy prior to surgery. Results IDH1 is detected in osteosarcoma cell lines and biopsies. IDH1 expresses higher in U2OS cells with wild type p53 than in MG-63 cells with mutation p53. IDH1 correlates with histological Rosen grade and metastasis negatively. P53 correlates with histological Rosen grade, metastasis and overall survival in clinical osteosarcoma biopsies. Osteosarcoma patients with High IDH1 expression have a very high p53 expression. Conclusion IDH1 may correlate with p53 and be a candidate biomarker for osteosarcoma correlate with histological Rosen grade and metastasis.
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Affiliation(s)
- Xiang Hu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, No 169 Donghu Road, Wuchang District, 430071, Wuhan, China
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Tao SX, Yu AX, Yu GR, Deng K, Zheng XH, Zhang Y, Zhang JH. [Anatomic study and clinical application of sural neuro-myocutaneous compound flap transposition]. Zhonghua Zheng Xing Wai Ke Za Zhi 2008; 24:16-19. [PMID: 18437975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To investigate the anatomical study and clinical applications of sural neuron-myocutaneous flap transposition for repairing the special patients with soft tissue defect in foot and ankle. METHODS The branches, distributions and anastomoses of the vessels and nerves lie in superficial layer of the posterior crural region were observed on 30 sides of adult cadaver lower limb specimens perfused with red latex. Since February 2004, distally based sural neuron-myocutaneous flap was applied for repairing 7 cases of soft tissue defect in foot and ankle. RESULTS The nutrient vessels of sural nerve, small saphenous vein and posterior femoral cutaneous nerve anastomosed permanently with the musculocutaneous perforators of medial and lateral head of gastrocnemius. There were 2 - 3 anastomoses found respectively. The musculocutaneous perforators pierced the two heads of gastrocnemius muscle (1.8 +/- 0.5) cm medially and (3.7 +/- 0.9) cm laterally away from the groove of the muscle. The medial anastomoses more closed to the middle groove and their diameters were found larger than the lateral ones. In operation, we routinely observed the compound flap for 15 to 20 minutes and found actively errhysis on the muscle, so the fine blood circulation in the flap was demonstrated. All flap survived after operation and the cases were followed up 2 to 6 months with cured osteomyelitis and satisfied flap outline. CONCLUSIONS Distally based sural neuro-myocutaneous flap can live. The operative method is simple. The flap offers an excellent donor site for repairing the soft tissue defect in foot and ankle in special cases.
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Affiliation(s)
- Sheng-Xiang Tao
- Department of Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
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Abstract
OBJECTIVE Anatomical study on the anastomosis between the neurovascular axis and the musculocutaneous perforators in leg. The distally-based neuron-myocutaneous flap was used for repairing special patients with soft tissue defect in foot and ankle. METHODS Systematical observation was carried out on 30 injected lower legs about the anastomosis between the neurovascular axis and the musculocutaneous perforators, and we summarized the clinical experiences from February 2004 on 12 cases using distally-based neuron-myocutaneous flap for repairing special patients with soft tissue defect in foot and ankle. RESULTS The neuron-vessels of sural nerve anastomosed permanently with the musculocutaneous perforators of medial and lateral head of gastrocnemius. There were two to three anastomoses found, respectively. The medial anastomotic branches were found larger in caliber than the lateral ones. The spatium intermuscular branches of the posterior tibial artery gave off their junior branches and anastomosed with the vessels in or out of the soleus muscle. There were two to three muscular branches perforated out of the soleus muscle, with mean caliber 0.5 +/- 0.2 mm and accompanying with one to two veins. The neuron-vessels of the superficial fibular nerve gave off alone its course two to three muscular branches to the long extensor muscle digits and the long fibular muscle, and one to two fasciocutaneous to the skin. The diameter of the muscular branches was 0.4 +/- 0.2 mm in average. Accounting for the operating models in the 12 cases, we had distally-based sural neuron-myocutaneous flap in 7 cases, saphenous neuron-myocutaneous flap in 4 cases, and superficial fibular neuron-myocutaneous flap in 1 case. All these cases were followed up at least for 2-6 months and had the significant results of nice limb's shape and cured osteomyelitis. CONCLUSION Distally-based neuro-myocutaneous flap in leg can live with reliable blood circulation. These flaps offer excellent donor sites for repairing special the soft tissue defect in foot and ankle.
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Affiliation(s)
- Ai-Xi Yu
- Department of Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan, China
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Yu AX, Chen ZG, Yu GR. [Repair of humeral fracture and non-union with transfer of vascularized periosteal flap]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:310-1. [PMID: 11761862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To study the results of humeral fracture and non-union repaired by vascularized periosteal flap transfer. METHODS The clinical data of humeral fracture and non-union in 23 cases were analysized retrospectively since 1995. Among them, minuted or several segmental fracture in 12 cases, non-union in 11 cases, and following injury of radial nerve in 7 cases. The operative method was open reduction, inner or external fixation with vascularized periosteal flap transfer. RESULTS The period of follow-up was 6 months to 2 years. The repair result of all patients was excellent and good, but elbow joint motion in 2 cases of non-union was not satisfactory. The periosteal flap had good osteogenic ability. The period of bone union was 2 to 5 months in humeral fracture and non-union. And function of radial nerve was recovery. CONCLUSION Transfer of distal humeral periosteal flap pedicled with radial collateral vessels is a better method for humeral fracture and non-union.
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Affiliation(s)
- A X Yu
- Department of Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan Hubei, P. R. China 430071
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Abstract
A monoclonal antibody designated Apt4, which is IgG1, was produced by fusion of mouse myeloma cells to spleen cells from a BALB/c mouse immunized with normal human platelets. Apt4 whole IgG caused the aggregation of both platelet rich plasma (PRP) and washed platelets from normal subjects and a patient with Bernard Soulier syndrome but not those from two patients with the Type 1 Glanzmann's thrombasthenia. No aggregation was observed when Apt4 F(ab')2 fragments were used. Immunofluorescence study showed that both whole IgG and F(ab')2 fragments of Apt4 bound to fresh or formalin fixed platelets from normal subjects and a patient with Bernard Soulier syndrome but not to those from two patients with Glanzmann's thrombasthenia. Aggregation induced by Apt4 IgG was inhibited by EDTA (10 mM), PGE1 (1 mM), 2-deoxy-D-glucose/antimycin (1.4 uM), and apyrase (20 units/ml). Preincubation of normal PRP with monoclonal anti-GPIIb/IIIa or anti-GPIb antibodies completely or partially inhibited the Apt4-induced aggregation, whereas anti-GPIIIa antibodies have no effects on this activation. Monoclonal ant-Fc gamma RII antibody (IV.3) inhibited Apt4 induced aggregation. Immunoprecipitation of 125I-labeled platelet membrane lysate by Apt4 IgG showed two protein bands with a molecular weight of 145,000 and 95,000 daltons respectively under non-reducing condition, which are corresponding to GPIIb and GPIIIa. In conclusion, Apt4 antibody binds to GPIIb/IIIa complex and induces aggregation, requiring energy metabolism, calcium, ADP release and Fc portion of IgG to interact with Fc receptor, but independent of thromboxane A2 formation.
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Affiliation(s)
- A X Yu
- Sylvester Cancer Center/Harrington Center for Blood Diseases, University of Miami School of Medicine, Florida
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