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Ma P, Ou H, Sun Z, Lu Y, Li M, Xu L, Liang Y, Zheng J, Ou Y. IAVPGEVA: Orally Available DPP4-Targeting Soy Glycinin Derived Octapeptide with Therapeutic Potential in Nonalcoholic Steatohepatitis. J Agric Food Chem 2024; 72:7167-7178. [PMID: 38511978 DOI: 10.1021/acs.jafc.3c08932] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
IAVPGEVA, an octapeptide derived from soybean 11S globulin hydrolysis, also known as SGP8, has exhibited regulatory effects on lipid metabolism, inflammation, and fibrosis in vitro. Studies using MCD and HFD-induced nonalcoholic steatohepatitis (NASH) models in mice show that SGP8 attenuates hepatic injury and metabolic disorders. Mechanistic studies suggest that SGP8 inhibits the JNK-c-Jun pathway in L02 cells and liver tissue under metabolic stress and targets DPP4 with DPP4 inhibitory activity. In conclusion, the results suggest that SGP8 is an orally available DPP4-targeting peptide with therapeutic potential in NASH.
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Affiliation(s)
- Peng Ma
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Hao Ou
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Zhongkan Sun
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Yunbiao Lu
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Mengdan Li
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Liuxin Xu
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Yan Liang
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Jiawei Zheng
- School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
| | - Yu Ou
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu, China
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2
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Wang X, Li J, Shang J, Bai J, Wu K, Liu J, Yang Z, Ou H, Shao L. Metabolites extracted from microorganisms as potential inhibitors of glycosidases (α-glucosidase and α-amylase): A review. Front Microbiol 2022; 13:1050869. [PMID: 36466660 PMCID: PMC9712454 DOI: 10.3389/fmicb.2022.1050869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 10/17/2022] [Indexed: 09/30/2023] Open
Abstract
α-Glucosidase and α-amylase are the two main glycosidases that participate in the metabolism of carbohydrates. Inhibitors of these two enzymes are considered an important medical treatment for carbohydrate uptake disorders, such as diabetes and obesity. Microbes are an important source of constituents that have the potential to inhibit glycosidases and can be used as sources of new drugs and dietary supplements. For example, the α-glucosidase inhibitor acarbose, isolated from Actinoplanes sp., has played an important role in adequately controlling type 2 diabetes, but this class of marketed drugs has many drawbacks, such as poor compliance with treatment and expense. This demonstrates the need for new microorganism-derived resources, as well as novel classes of drugs with better compliance, socioeconomic benefits, and safety. This review introduces the literature on microbial sources of α-glucosidase and α-amylase inhibitors, with a focus on endophytes and marine microorganisms, over the most recent 5 years. This paper also reviews the application of glycosidase inhibitors as drugs and dietary supplements. These studies will contribute to the future development of new microorganism-derived glycosidase inhibitors.
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Affiliation(s)
- Xiaojing Wang
- Affiliated Zhoupu Hospital, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Jiaying Li
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Shanghai University of Medicine and Health Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jiaqi Shang
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Jing Bai
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou, China
| | - Kai Wu
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Jing Liu
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Medical Technology, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Zhijun Yang
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Hao Ou
- Department of Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lei Shao
- Microbial Pharmacology Laboratory, Shanghai University of Medicine and Health Sciences, Shanghai, China
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai, China
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3
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Pu J, Ou H, Yamada T, Wada N, Naito H, Ogura H, Endo T, Liu Z, Irisawa T, Yanagi K, Nakanishi Y, Gao Y, Maruyama M, Okada S, Shinokita K, Matsuda K, Miyata Y, Takenobu T. Continuous Color-Tunable Light-Emitting Devices Based on Compositionally Graded Monolayer Transition Metal Dichalcogenide Alloys. Adv Mater 2022; 34:e2203250. [PMID: 36086880 DOI: 10.1002/adma.202203250] [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] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 08/29/2022] [Indexed: 06/15/2023]
Abstract
The diverse series of transition metal dichalcogenide (TMDC) materials has been employed in various optoelectronic applications, such as photodetectors, light-emitting diodes, and lasers. Typically, the detection or emission range of optoelectronic devices is unique to the bandgap of the active material. Therefore, to improve the capability of these devices, extensive efforts have been devoted to tune the bandgap, such as gating, strain, and dielectric engineering. However, the controllability of these methods is severely limited (typically ≈0.1 eV). In contrast, alloying TMDCs is an effective approach that yields a composition-dependent bandgap and enables light emissions over a wide range. In this study, a color-tunable light-emitting device using compositionally graded TMDC alloys is fabricated. The monolayer WS2 /WSe2 alloy grown by chemical vapor deposition shows a spatial gradient in the light-emission energy, which varies from 2.1 to 1.7 eV. This alloy is incorporated in an electrolyte-based light-emitting device structure that can tune the recombination zone laterally. Thus, a continuous and reversible color-tunable light-emitting device is successfully fabricated by controlling the light-emitting positions. The results provide a new approach for exploring monolayer semiconductor-based broadband optical applications.
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Affiliation(s)
- Jiang Pu
- Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan
| | - Hao Ou
- Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan
| | - Tomoyuki Yamada
- Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan
| | - Naoki Wada
- Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Hibiki Naito
- Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Hiroto Ogura
- Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Takahiko Endo
- Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Zheng Liu
- Innovative Functional Materials Research Institute, AIST, Nagoya, 463-8560, Japan
| | - Toshifumi Irisawa
- Device Technology Research Institute, AIST, Tsukuba, 305-8562, Japan
| | - Kazuhiro Yanagi
- Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Yusuke Nakanishi
- Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Yanlin Gao
- Department of Physics, University of Tsukuba, Tsukuba, 305-8571, Japan
| | - Mina Maruyama
- Department of Physics, University of Tsukuba, Tsukuba, 305-8571, Japan
| | - Susumu Okada
- Department of Physics, University of Tsukuba, Tsukuba, 305-8571, Japan
| | - Keisuke Shinokita
- Institute of Advanced Energy, Kyoto University, Kyoto, 611-0011, Japan
| | - Kazunari Matsuda
- Institute of Advanced Energy, Kyoto University, Kyoto, 611-0011, Japan
| | - Yasumitsu Miyata
- Department of Physics, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Taishi Takenobu
- Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan
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Sun W, Guo J, Ou H, Zhang L, Wang D, Ma Z, Zhu B, ali I, Naz I. Facile synthesis of highly moisture-resistant Mg-MOF-74 by coating hexagonal boron nitride (h-BN). J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Ou H, Matsuoka H, Tempia J, Yamada T, Takahashi T, Oi K, Takaguchi Y, Endo T, Miyata Y, Chen CH, Li LJ, Pu J, Takenobu T. Spatial Control of Dynamic p-i-n Junctions in Transition Metal Dichalcogenide Light-Emitting Devices. ACS Nano 2021; 15:12911-12921. [PMID: 34309369 DOI: 10.1021/acsnano.1c01242] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Emerging transition metal dichalcogenides (TMDCs) offer an attractive platform for investigating functional light-emitting devices, such as flexible devices, quantum and chiral devices, high-performance optical modulators, and ultralow threshold lasers. In these devices, the key operation is to control the light-emitting position, that is, the spatial position of the recombination zone to generate electroluminescence, which permits precise light guides/passes/confinement to ensure favorable device performance. Although various structures of TMDC light-emitting devices have been demonstrated, including the transistor configuration and heterostructured diodes, it is still difficult to tune the light-emitting position precisely owing to the structural device complexity. In this study, we fabricated two-terminal light-emitting devices with chemically synthesized WSe2, MoSe2, and WS2 monolayers, and performed direct observations of their electroluminescence, from which we discovered a divergence in their light-emitting positions. Subsequently, we propose a method to associate spatial electroluminescence imaging with transport properties among different samples; consequently, a common rule for determining the locations of recombination zones is revealed. Owing to dynamic carrier accumulations and p-i-n junction formations, the light-emitting positions in electrolyte-based devices can be tuned continuously. The proposed method will expand the device applicability for designing functional optoelectronic applications based on TMDCs.
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Affiliation(s)
- Hao Ou
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Hirofumi Matsuoka
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Juliette Tempia
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Tomoyuki Yamada
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Togo Takahashi
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Koshi Oi
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Yuhei Takaguchi
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Takahiko Endo
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Yasumitsu Miyata
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Chang-Hsiao Chen
- Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Lain-Jong Li
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Jiang Pu
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Taishi Takenobu
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
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Sun B, Ou H, Ren F, Guan Y, Huan Y, Cai H. Propofol Protects against Cerebral Ischemia/Reperfusion Injury by Down-Regulating Long Noncoding RNA SNHG14. ACS Chem Neurosci 2021; 12:3002-3014. [PMID: 34369750 DOI: 10.1021/acschemneuro.1c00059] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Cerebral ischemia-reperfusion (CI/R) injury is a serious central nervous system disease. Propofol (PPF) exerts a neuroprotective effect in CI/R injury; the underlying cause is still unclear. Here, we cultured mouse hippocampal neuron (HT22 cells) in oxygen-glucose deprivation/reoxygenation (OGD/R) conditions to mimic CI/R injury in vitro. PPF treatment promoted cell viability and reduced apoptotic cells in the OGD/R-treated HT22 cells, which was effectively abrogated by SNHG14 overexpression. Moreover, we constructed a CI/R injury mouse model on C57BL/6J mice by middle cerebral artery occlusion/reperfusion (MCAO/R), followed by administration of PPF. PPF reduced neuronal damage and loss, enhanced glial cell hyperplasia, and ameliorated cerebral cortex tissue damage and brain infarct in MCAO/R-induced mice. SNHG14 overexpression aggravated MCAO/R-induced CI/R injury in mice. Furthermore, SNHG14 promoted the expression of Atg5 and Beclin 1 via competitively binding miR-30b-5p, which contributed to activate autophagy and apoptosis in HT22 cells. In addition, the levels of p-p38 and p-SP1 were reduced in the OGD/R-treated HT22 cells in the presence of PPF. SP1 interacted with the promoter of SNHG14 and elevated the expression of SNHG14. PPF treatment inhibited the SP1-mediated up-regulation of SNHG14. In conclusion, this work demonstrates that PPF inhibits SNHG14 expression though the p38 MAPK signaling pathway. SNHG14 promotes Atg5 and Beclin 1 expression by sponging miR-30b-5p and thus activates autophagy and aggravates CI/R injury.
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Affiliation(s)
- Bei Sun
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Hao Ou
- Department of Emergency and Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha 410013, Hunan, China
| | - Fei Ren
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yujiao Guan
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Ye Huan
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Hongwei Cai
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
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Zhang X, Liu Y, Zhang Z, Tan J, Zhang J, Ou H, Li J, Song Z. Multi-Omics Analysis of Anlotinib in Pancreatic Cancer and Development of an Anlotinib-Related Prognostic Signature. Front Cell Dev Biol 2021; 9:649265. [PMID: 33748143 PMCID: PMC7969999 DOI: 10.3389/fcell.2021.649265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/04/2021] [Accepted: 02/08/2021] [Indexed: 12/28/2022] Open
Abstract
Aberrant regulation of angiogenesis involves in the growth and metastasis of tumors, but angiogenesis inhibitors fail to improve overall survival of pancreatic cancer patients in previous phase III clinical trials. A comprehensive knowledge of the mechanism of angiogenesis inhibitors against pancreatic cancer is helpful for clinical purpose and for the selection of patients who might benefit from the inhibitors. In this work, multi-omics analyses (transcriptomics, proteomics, and phosphoproteomics profiling) were carried out to delineate the mechanism of anlotinib, a novel angiogenesis inhibitor, against pancreatic cancer cells. The results showed that anlotinib exerted noteworthy cytotoxicity on pancreatic cancer cells. Multi-omics analyses revealed that anlotinib had a profound inhibitory effect on ribosome, and regulated cell cycle, RNA metabolism and lysosome. Based on the multi-omics results and available data deposited in public databases, an anlotinib-related gene signature was further constructed to identify a subgroup of pancreatic cancer patients who had a dismal prognosis and might be responsive to anlotinib.
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Affiliation(s)
- Xi Zhang
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Yang Liu
- Department of Pathology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Zhen Zhang
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Juan Tan
- Department of Pathology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Junjun Zhang
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Hao Ou
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Jie Li
- Department of Information Science and Engineering, Hunan University of Chinese Medicine, Changsha, China
| | - Zewen Song
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, China
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Liu S, Li Y, Zhang J, Zhang H, Wang Y, Chuah C, Tang Y, Lam J, Kwok R, Ou H, Ding D, Tang B. A two-in-one Janus NIR-II AIEgen with balanced absorption and emission for image-guided precision surgery. Mater Today Bio 2021; 10:100087. [PMID: 33889836 PMCID: PMC8050777 DOI: 10.1016/j.mtbio.2020.100087] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 10/03/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023] Open
Abstract
Fluorescence imaging in the near-infrared II (NIR-II, 1000-1700 nm) region opens up new avenues for biological systems due to suppressed scattering and low autofluorescence at longer-wavelength photons. Nonetheless, the development of organic NIR-II fluorophores is still limited mainly due to the shortage of efficient molecular design strategy. Herein, we propose an approach of designing Janus NIR-II fluorophores by introducing electronic donors with distinct properties into one molecule. As a proof-of-concept, fluorescent dye 2 TT-m, oC6B with both twisted and planar electronic donors displayed balanced absorption and emission which were absent in its parent compound. The key design strategy for Janus molecule is that it combines the merits of intense absorption from planar architecture and high fluorescence quantum yield from twisted motif. The resulting 2 TT-m, oC6B nanoparticles exhibit a high molar absorptivity of 1.12 ⨯104 M-1 cm-1 at 808 nm and a NIR-II quantum yield of 3.7%, displaying a typical aggregation-induced emission (AIE) attribute. The highly bright and stable 2 TT-m, oC6B nanoparticles assured NIR-II image-guided cancer surgery to resect submillimeter tumor nodules. The present study may inspire further development of molecular design philosophy for highly bright NIR-II fluorophores for biomedical applications.
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Affiliation(s)
- S. Liu
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Y. Li
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - J. Zhang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - H. Zhang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Y. Wang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - C. Chuah
- Institute for NanoScale Science and Technology, College of Science and Engineering, Flinders University, South Australia, 5042, Australia
| | - Y. Tang
- Institute for NanoScale Science and Technology, College of Science and Engineering, Flinders University, South Australia, 5042, Australia
| | - J.W.Y. Lam
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - R.T.K. Kwok
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - H. Ou
- Key Laboratory of Bioactive Materials Ministry of Education and College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - D. Ding
- Key Laboratory of Bioactive Materials Ministry of Education and College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - B.Z. Tang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science and State Key Laboratory of Molecular Neuroscience, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Center for Aggregation-Induced Emission SCUT-HKUST Joint Research Institute State Key Laboratory of Luminescent Materials and Devices South China University of Technology, Guangzhou, 510640, China
- AIE Institute, Guangzhou Development District, Huangpu, Guangzhou, 510530, China
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Deng Z, Ou H, Ren F, Guan Y, Huan Y, Cai H, Sun B. LncRNA SNHG14 promotes OGD/R-induced neuron injury by inducing excessive mitophagy via miR-182-5p/BINP3 axis in HT22 mouse hippocampal neuronal cells. Biol Res 2020; 53:38. [PMID: 32912324 PMCID: PMC7488096 DOI: 10.1186/s40659-020-00304-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [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: 05/15/2020] [Accepted: 08/11/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Long non-coding RNA (lncRNA) small nucleolar RNA host gene 14 (SNHG14) is associated with cerebral ischemia-reperfusion (CI/R) injury. This work aims to explore the role of SNHG14 in CI/R injury. METHODS HT22 (mouse hippocampal neuronal cells) cell model was established by oxygen-glucose deprivation/reoxygenation (OGD/R) treatment. The interaction among SNHG14, miR-182-5p and BNIP3 was verified by luciferase reporter assay. Flow cytometry, western blot and quantitative real-time PCR were performed to examine apoptosis, the expression of genes and proteins. RESULTS SNHG14 and BNIP3 were highly expressed, and miR-182-5p was down-regulated in the OGD/R-induced HT22 cells. OGD/R-induced HT22 cells exhibited an increase in apoptosis. SNHG14 overexpression promoted apoptosis and the expression of cleaved-caspase-3 and cleaved-caspase-9 in the OGD/R-induced HT22 cells. Moreover, SNHG14 up-regulation enhanced the expression of BNIP3, Beclin-1, and LC3II/LC3I in the OGD/R-induced HT22 cells. Furthermore, SNHG14 regulated BNIP3 expression by sponging miR-182-5p. MiR-182-5p overexpression or BNIP3 knockdown repressed apoptosis in OGD/R-induced HT22 cells, which was abolished by SNHG14 up-regulation. CONCLUSION Our study demonstrates that lncRNA SNHG14 promotes OGD/R-induced neuron injury by inducing excessive mitophagy via miR-182-5p/BINP3 axis in HT22 mouse hippocampal neuronal cells. Thus, SNHG14/miR-182-5p/BINP3 axis may be a valuable target for CI/R injury therapies.
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Affiliation(s)
- Zexiang Deng
- Department of Anesthesiology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Hao Ou
- Department of Emergency and Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
| | - Fei Ren
- Department of Anesthesiology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Yujiao Guan
- Department of Anesthesiology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Ye Huan
- Department of Anesthesiology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Hongwei Cai
- Department of Anesthesiology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China.
| | - Bei Sun
- Department of Anesthesiology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China.
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10
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Ou H, Li GL, Wang HQ, Huang GY, Cai GY, Li ZC, Wu ZF, Zhang XW. [MEK inhibitor PD0325901 significantly boosts ssODN-mediated HDR efficiency in porcine fetal fibroblasts]. Yi Chuan 2019; 41:327-336. [PMID: 30992254 DOI: 10.16288/j.yczz.18-294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
There are two major pathways, homology-directed repair (HDR) and nonhomologous end joining (NHEJ), involved in double-strand break (DSB) repair. Single-stranded oligodeoxyribonucleotide (ssODN)-mediated homologous recombination repair is commonly used for animal site-directed genome editing, with great scientific and practical value. To improve ssODN-mediated HDR efficiency in the pig genome, we investigated the effect and molecular mechanism of mitogen-activated extracellular signal-regulated kinase (MEK) inhibitor PD0325901 on the HDR efficiency in porcine fetal fibroblasts (PFFs). The results showed that PD0325901 obviously increased the percentage of G2 and S phase cell populations and reduced the cell population ratio in the G1 phase of PFFs, and promoted the expression of HDR repair factor. At the optimal concentration of 250 nmol/L, PD0325901 increased the repair efficiency of ssODN-mediated GFP reporter vector by 58.8% and the directed editing efficiency of PFF DMD and ROSA26 locus by 48.16% and 17.64%, respectively. The results show that MEK inhibitor PD0325901 significantly promotes the efficiency of ssODN-mediated homologous-directed repair in the porcine genome, thus offering a new idea to generate genetically modified pigs more effectively.
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Affiliation(s)
- Hao Ou
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Guo Ling Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Hao Qiang Wang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Guang Yan Huang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Geng Yuan Cai
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.,Wens Foodstuff Group Co., Ltd, Xinxing 527400, China
| | - Zi Cong Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Zhen Fang Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.,Wens Foodstuff Group Co., Ltd, Xinxing 527400, China
| | - Xian Wei Zhang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.,Wens Foodstuff Group Co., Ltd, Xinxing 527400, China
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11
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Zhang Y, Ullah I, Zhang W, Ou H, Domingos M, Gloria A, Zhou J, Li W, Zhang X. Preparation of electrospun nanofibrous polycaprolactone scaffolds using nontoxic ethylene carbonate and glacial acetic acid solvent system. J Appl Polym Sci 2019. [DOI: 10.1002/app.48387] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yu Zhang
- State Key Laboratory of Materials Processing and Die/Mould TechnologySchool of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan 430074 People's Republic of China
| | - Ismat Ullah
- State Key Laboratory of Materials Processing and Die/Mould TechnologySchool of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan 430074 People's Republic of China
| | - Wancheng Zhang
- State Key Laboratory of Materials Processing and Die/Mould TechnologySchool of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan 430074 People's Republic of China
| | - Hao Ou
- State Key Laboratory of Materials Processing and Die/Mould TechnologySchool of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan 430074 People's Republic of China
| | - Marco Domingos
- School of Mechanical, Aerospace and Civil Engineering, University of Manchester Manchester, UK
| | - Antonio Gloria
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy V.le J.F. Kennedy 54 ‐ Mostra d'Oltremare Pad. 20, 80125 Naples Italy
| | - Jinge Zhou
- State Key Laboratory of Materials Processing and Die/Mould TechnologySchool of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan 430074 People's Republic of China
| | - Wenchao Li
- School of Mechatronics Engineering, Nanchang University Nanchang 330000 People's Republic of China
| | - Xianglin Zhang
- State Key Laboratory of Materials Processing and Die/Mould TechnologySchool of Materials Science and Engineering, Huazhong University of Science and Technology Wuhan 430074 People's Republic of China
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12
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Shi L, Hu Y, Ullah MW, Ullah I, Ou H, Zhang W, Xiong L, Zhang X. Cryogenic free-form extrusion bioprinting of decellularized small intestinal submucosa for potential applications in skin tissue engineering. Biofabrication 2019; 11:035023. [PMID: 30943455 DOI: 10.1088/1758-5090/ab15a9] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A novel strategy of cryogenic 3D bioprinting assisted by free-from extrusion printing has been developed and applied to printing of a decellularized small intestinal submucosa (dSIS) slurry. The rheological properties, including kinetic viscosity, storage modulus (G'), and loss modulus (G″), were appropriate for free-from extrusion printing of dSIS slurry. Three different groups of scaffolds, including P500, P600, and P700, with filament distances of 500, 600, and 700 μm, respectively were fabricated at a 5 mm s-1 working velocity of the platform (V xy) and 25 kPa air pressure of the dispensing system (P) at -20 °C. The fabricated scaffolds were crosslinked via 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) which resulted in a polyporous microstructure. The variations in the filament diameter and pore size were evaluated in the initial frozen state after printing, the lyophilized state, and after immersion in a PBS solution. The Young's modulus of the P500, P600, and P700 scaffolds was measured in wet and dry states for EDC-crosslinked scaffolds. The cell experiment results showed improved cell adhesion, viability, and proliferation both on the surface and within the scaffold, indicating the biocompatibility and suitability of the scaffold for 3D cell models. Further, gene and protein expression of normal skin fibroblasts on dSIS scaffolds demonstrated their ability to promote the production of some extracellular matrix proteins (i.e. collagen I, collagen III, and fibronectin) in vitro. Overall, this study presents a new potential strategy, by combining cryogenic 3D bioprinting with decellularized extracellular matrix materials, to manufacture ideal scaffolds for skin tissue engineering applications.
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Affiliation(s)
- Lei Shi
- State Key Laboratory of Materials Processing and Die/Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
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13
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Li G, Zhang X, Ou H, Wang H, Liu D, Yang H, Wu Z. PIK-75 promotes homology-directed DNA repair. J Genet Genomics 2019; 46:141-144. [PMID: 30935856 DOI: 10.1016/j.jgg.2019.03.002] [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] [Received: 10/23/2018] [Revised: 01/19/2019] [Accepted: 03/04/2019] [Indexed: 10/27/2022]
Affiliation(s)
- Guoling Li
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Xianwei Zhang
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Hao Ou
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Haoqiang Wang
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Dewu Liu
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Huaqiang Yang
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China.
| | - Zhenfang Wu
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China.
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Gao M, Ou H, Jiang Y, Wang K, Peng Y, Zhang H, Yang M, Xiao X. Tanshinone IIA attenuates sepsis-induced immunosuppression and improves survival rate in a mice peritonitis model. Biomed Pharmacother 2019; 112:108609. [PMID: 30784917 DOI: 10.1016/j.biopha.2019.108609] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/12/2019] [Accepted: 01/23/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The importance of sepsis-induced immunosuppression and its contribution to mortality has recently emerged. In this study we examined the effects of Tanshinone II-A (TSN), a widely used traditional Chinese medicine, on immunosuppression in experimental peritonitis induced septic mice. MATERIALS AND METHODS Sepsis was achieved by means of cecal ligation and puncture (CLP). TSN at different doses (5, 15 and 45 mg/kg, i.p.) were used at different time-points (0, 3, 6 and 12 h) after CLP to evaluate its effect on the survival of septic mice. In parallel experiments, mice given TSN at optimal dose and time-point were euthanized to collect peritoneal macrophages, blood and tissue samples at 24 h after the CLP. RESULTS TSN improved the survival of septic mice in a dose- and time-dependent manner. TSN reduced CLP-induced serum biochemical parameters and protected organs from histopathological injuries. CLP-induced apoptosis and decreased percentages of splenic CD4+ and CD8+ T cells were reversed in TSN-treated mice. Moreover, CLP-induced formation of regulatory T cells (Treg) in the spleen was abolished in TSN-treated mice. CLP greatly decreased the levels of interferon-γ and interleukin (IL)-2 in the spleen, while the levels of IL-4 and IL-10 increased after CLP. TSN completely reversed these alterations and elicited a more-balanced Th1/Th2 response. Moreover, TSN promoted macrophage phagocytotic activity and improved bacterial clearance of septic mice. Lastly, TSN abolished CLP-triggered increase in serum HMBG1 level. And HMGB1 neutralization could increase the percentages of splenic CD3+CD4+/CD3+CD8+ lymphocytes and decreased the Treg population. CONCLUSIONS Overall, our data suggest that TSN exerts immune modulatory effect and might be a useful strategy to ameliorate immunosuppression in polymicrobial sepsis.
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Affiliation(s)
- Min Gao
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Hao Ou
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Yu Jiang
- Institute of Emergency Medicine, Hunan Provincial Key Laboratory of Emergency and Critical Care Metabonomics, Hunan Provincial People's Hospital, Changsha, Hunan, 410005, People's Republic of China
| | - Kangkai Wang
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410078, People's Republic of China
| | - Yue Peng
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Huali Zhang
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410078, People's Republic of China
| | - Mingshi Yang
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China.
| | - Xianzhong Xiao
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Critical Care Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, 410013, People's Republic of China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410078, People's Republic of China.
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15
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Peng Y, Ou H, Yang M, Jiang Y, Gao M. [Inhibition of lipopolysaccharide-induced inflammation in RAW264.7 macrophages by sinomenine through regulating heme oxygenase-1 expression and autophagy]. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2019; 43:964-970. [PMID: 30333287 DOI: 10.11817/j.issn.1672-7347.2018.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To investigate the effect of sinomenine on lipopolysaccharide (LPS)-induced inflammation in RAW264.7 macrophages and the underlying mechanisms.
Methods: The mouse RAW264.7 macrophages were treated with sinomenine and/or LPS with or without heme oxygenase-1 (HO-1) inhibitor Znpp. Real-time PCR, ELISA, immunofluenscence, and Western blot were used to detect the mRNA expression of TNF-α and IL-6, the release of TNF-α and IL-6, the protein expression of HO-1 and autophagy, respectively.
Results: Compared with the control group, the mRNA expression and release of inflammatory cytokines TNF-α and IL-6 were increased, the green fluorescence of autophagy-related protein LC3 was accumulated and the protein expression of HO-1 was increased in RAW264.7 cells after LPS treatment (P<0.05). Compared with the LPS group, sinomenine treatment could reduce the mRNA expression and release of TNF-α and IL-6, accompanied by increasess in green fluorescence aggregation of LC3 and HO-1 production (P<0.05). HO-1 inhibitor Znpp could weaken the ability of sinomenine through suppressing TNF-α and IL-6 expression and decreasing the aggregation of LC3 green fluorescence (P<0.05).
Conclusion: Sinomenine could alleviate LPS-induced inflammation in RAW264.7 macrophages, which might be related to HO-1 mediated autophagy. This study provides an experimental and theoretical basis for the clinical application of sinomenine in prevention and treatment of inflammation.
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Affiliation(s)
- Yue Peng
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Hao Ou
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Mingshi Yang
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Yu Jiang
- Institute of Emergency Medicine; Hunan Provincial Key Laboratory of Emergency and Critical Care Metabonomics, Hunan Provincial People's Hospital, Changsha 410005, China
| | - Min Gao
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
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Peng Y, Jiang Y, Ou H, Xing W, Yang M, Gao M. [Role of autophagy in ameliorating sepsis-induced acute lung injury by allicinin in mice]. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2019; 42:899-905. [PMID: 28872080 DOI: 10.11817/j.issn.1672-7347.2017.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To investigate roles of autophagy in ameliorating sepsis-induced acute lung injury by allicinin in mice.
Methods: A total of 152 male Balb/c mice (8-week old) were randomly divided into a sham group, a septic model group, an allicin treatment group, and an autophagy inhibition group. Septic mouse model was established by cecal ligation and puncture (CLP). Mice in the allicin treatment group were given allicin (30 mg/kg, intra-peritoneal injection) at 6 and 12 h, while those in the autophagy inhibition group were given autophagy inhibitor 3-MA (15 mg/kg, intra-peritoneal injection) at half an hour after allicin administration. Mice in the model and sham group were administered with the same amount of saline. Twenty mice in each group were randomly chosen to observe the 7 d survival rate. The other 12 mice were killed at 24 h, and the bronchoalveolar lavage fluid (BALF) (n=6) and lung tissues (n=6) were collected. ELISA was used to detect the tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in the BALF. Hematoxylin-eosin staining was preformed to show the morphological changes in the lung tissues. Malondialdehyde (MDA) content and the activity of superoxide dismutase (SOD) in the lung tissues were examined. The expression of LC3B and Beclin-1 was determined by immunohistochemical analysis.
Results: Compared with the sham group, the 7 d survival rate and lung SOD activity were decreased in the CLP group (P<0.05); the lung morphological damage score, the levels of TNF-α and IL-6 in the BALF, MDA content in the lung, and expression of LC3B and Beclin-1 were increased greatly in the CLP group (P<0.05). Compared with the CLP group, the 7 d survival rate, lung SOD activity and the expressions of LC3B and Beclin-1 were increased significantly in the allicin treatment group (P<0.05); the lung morphological damage scores, the levels of TNF-α and IL-6 in the BALF and MDA content in the lung were decreased obviously in the allicin treatment group (P<0.05). Compared with the allicin treatment group, the 7 d survival rate, lung SOD activity, and the expressions of LC3B and Beclin-1 were decreased in the 3-MA group (P<0.05); the lung morphological damage scores, the levels of TNF-α and IL-6 in the BALF, and MDA content in the lung were increased significantly in the 3-MA group (P<0.05).
Conclusion: Allicin may ameliorate sepsis-induced acute lung injury in mice by enhancing the level of autophagy.
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Affiliation(s)
- Yue Peng
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Yu Jiang
- Institute of Emergency Medicine, Hunan Provincial People's Hospital, Changsha 410005, China
| | - Hao Ou
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Wei Xing
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Mingshi Yang
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Min Gao
- Department of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
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Sun B, Ou H, Ren F, Huan Y, Zhong T, Gao M, Cai H. Propofol inhibited autophagy through Ca 2+/CaMKKβ/AMPK/mTOR pathway in OGD/R-induced neuron injury. Mol Med 2018; 24:58. [PMID: 30470173 PMCID: PMC6251140 DOI: 10.1186/s10020-018-0054-1] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [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: 08/13/2018] [Accepted: 09/24/2018] [Indexed: 11/22/2022] Open
Abstract
Background The neuroprotective role of propofol (PPF) in cerebral ischemia-reperfusion (I/R) has recently been highlighted. This study aimed to explore whether the neuroprotective mechanisms of PPF were linked to its regulation of Ca2+/CaMKKβ (calmodulin-dependent protein kinase kinase β)/AMPK (AMP-activated protein kinase)/mTOR (mammalian target of rapamycin)/autophagy pathway. Methods Cultured primary rat cerebral cortical neurons were treated with oxygen-glucose deprivation and re-oxygenation (OGD/R) to mimic cerebral I/R injury in vitro. Results Compared with the control neurons, OGD/R exposure successfully induced neuronal I/R injury. Furthermore, OGD/R exposure notably caused autophagy induction, reflected by augmented LC3-II/LC3-I ratio and Beclin 1 expression, decreased p62 expression, and increased LC3 puncta formation. Moreover, OGD/R exposure induced elevation of intracellular Ca2+ concentration ([Ca2+]i). However, PPF treatment significantly antagonized OGD/R-triggered cell injury, autophagy induction, and [Ca2+]i elevation. Further investigation revealed that both autophagy induction by rapamycin and [Ca2+]i elevation by the Ca2+ ionophore ionomycin significantly reversed the PPF-mediated amelioration of OGD/R-triggered cell injury. Importantly, ionomycin also significantly abrogated the PPF-mediated suppression of autophagy and CaMKKβ/AMPK/mTOR signaling in OGD/R-exposed neurons. Additionally, activation of CaMKKβ/AMPK/mTOR signaling abrogated the PPF-mediated autophagy suppression. Conclusion Our findings demonstrate that PPF antagonized OGD/R-triggered neuronal injury, which might be mediated, at least in part, via inhibition of autophagy through Ca2+/CaMKKβ/AMPK/mTOR pathway. Electronic supplementary material The online version of this article (10.1186/s10020-018-0054-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bei Sun
- Department of Anesthesiology, Xiangya Hospital, Central South University, 410078, Changsha, Hunan, People's Republic of China
| | - Hao Ou
- Department of Emergency and Critical Care Medicine, The Third Xiangya Hospital, Central South University, 410013, Changsha, Hunan, People's Republic of China.,Translational Medicine Center of Sepsis, Department of Pathophysiology, The Third Xiangya Hospital, Central South University, 410013, Changsha, Hunan, People's Republic of China
| | - Fei Ren
- Department of Anesthesiology, Xiangya Hospital, Central South University, 410078, Changsha, Hunan, People's Republic of China
| | - Ye Huan
- Department of Anesthesiology, Xiangya Hospital, Central South University, 410078, Changsha, Hunan, People's Republic of China
| | - Tao Zhong
- Department of Anesthesiology, Xiangya Hospital, Central South University, 410078, Changsha, Hunan, People's Republic of China
| | - Min Gao
- Department of Emergency and Critical Care Medicine, The Third Xiangya Hospital, Central South University, 410013, Changsha, Hunan, People's Republic of China.,Translational Medicine Center of Sepsis, Department of Pathophysiology, The Third Xiangya Hospital, Central South University, 410013, Changsha, Hunan, People's Republic of China
| | - Hongwei Cai
- Department of Anesthesiology, Xiangya Hospital, Central South University, 410078, Changsha, Hunan, People's Republic of China.
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Chen S, Yang H, Wu M, Wei X, Ou H, Yi M, Meng Y, Lin Z, Huang H, Yao M. Relationship between Expression of ERCC1 and Effect of Cisplatin Concurrent Chemoradiation in Stage II-IIIA Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.735] [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: 11/26/2022]
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Ou H, Xiao X, Jiang Y, Peng Y, Yang M, Gao M. Expression of microRNA-23b in patients with sepsis and its effect on leukocytes and the expression of E-selectin and ICAM-1. Exp Ther Med 2018; 16:4707-4711. [PMID: 30542424 PMCID: PMC6257422 DOI: 10.3892/etm.2018.6759] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 04/02/2018] [Accepted: 09/10/2018] [Indexed: 12/14/2022] Open
Abstract
The expression of microRNA-23b in peripheral blood leukocytes of patients with sepsis was investigated to assess the correlations with leukocyte, E-selectin, ICAM-1 and disease severity. The expression of microRNA-23b in peripheral blood leukocytes from 87 patients with sepsis, 50 patients with systemic inflammatory response syndrome (SIRS) and 50 normal controls were measured by reverse transcription-quantitative PCR (RT-qPCR), and stability of microRNA-23b was evaluated. Enzyme-linked immunosorbent assay (ELISA) was used to detect E-selectin and ICAM-1. Sequential organ failure assessment (SOFA) scoring system was used to assess the severity of sepsis patients. Correlation analysis was performed between microRNA-23b and the total number of white blood cells (WBC), E-selectin, ICAM-1, and SOFA scores. Compared with the normal control group, the expression level of microRNA-23b in the sepsis group was significantly decreased (P<0.05), and WBC and E-selectin were significantly increased (P<0.05). ICAM-1 level in the sepsis and the SIRS groups was significantly higher than that in the control group (P<0.05), and it is also higher in the sepsis group than in the SIRS group. In the sepsis group, the expression level of microRNA-23b in the death group was significantly lower than that in the survivor group (P<0.05), while the level of E-selectin, ICAM-1, and SOFA scores were significantly higher in the death group than in the survivor group (P<0.05), while there was no significant difference in WBC between the groups (P>0.05). The expression level of microRNA-23b in patients with sepsis was significantly negatively correlated with SOFA scores, E-selectin, and ICAM-1 (r=-0.633, -0.585, and -0.439, respectively, P<0.05). The expression of microRNA-23b in peripheral blood of patients with sepsis is related to the manifestation of the inflammatory state, and can be used to judge the severity and prognosis of patients with this disease.
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Affiliation(s)
- Hao Ou
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China.,Department of Critical Care Medicine, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Xianzhong Xiao
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China.,Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
| | - Yu Jiang
- Hunan Provincial Institute of Emergency Medicine, Hunan Provincial People's Hospital, Changsha, Hunan 410005, P.R. China
| | - Yue Peng
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China.,Department of Critical Care Medicine, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Mingshi Yang
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China.,Department of Critical Care Medicine, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Min Gao
- Translational Medicine Center of Sepsis, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China.,Department of Critical Care Medicine, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
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Ou H, Yu Q. [Effects of combination therapy with aspirin, prednisone, and Elevit in patients with unexplained recurrent early pregnancy loss]. Zhonghua Yi Xue Za Zhi 2017; 97:3250-3254. [PMID: 29141364 DOI: 10.3760/cma.j.issn.0376-2491.2017.41.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of triple therapy with aspirin, prednisone and Elevit in patients with unexplained recurrent early pregnancy loss. Methods: From January 1, 2013 to December 31, 2016, a total of 353 women of childbearing age were enrolled in Peking Union Medical College Hospital, including blood, urine and vaginal swabs. One hundred and fifty-five patients were observed normal results of blood test, urine test and vaginal swabs. According to the treatment regimen, 155 patients were divided into two groups, 89 patients (57.42%) treated with (aspirin, prednisone, and Elevit) as experimental group, and the other 66 cases (42.58%) taking folic acid as control group. The fetal bud, fetal heart and neck hyaline layer thickness were examined by ultrasonography at 12 weeks. Visible fetal bud, fetal heart, and nuchal translucency thickness <0.3 cm were used as indicators of successful treatment. t test and χ(2) test were used to analyze and compare the statistical significance of the differences between the two groups of patients, and the Logistic method was used to analyze the data and observe the effect of medication. Results: There were 67 patients successfully treated in the experimental group, the successful rate was 83.75% (67/80), and 33 patients in the control group were successfully treated, the successful rate was 54.10% (33/61). There were significant statistical differences in two groups (P<0.05). Conclusion: The effect of triple therapy with aspirin, prednisone and Elevit in patients with unexplained recurrent early pregnancy loss is significant.
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Affiliation(s)
- H Ou
- Chinese Academy of Medical Sciences & Peking Union Medical College, Peking Union Medical College Hospital, Beijing 100730, China
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Zhao S, Ou H, Peng Y, Liu Z, Yang M, Xiao X. [Role of local citrate anticoagulation in continuous blood purification to patients at high risk of bleeding in ICU]. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2017; 41:1334-1339. [PMID: 28070048 DOI: 10.11817/j.issn.1672-7347.2016.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To evaluate the safety and efficiency of citrate anticoagulant-based continuous blood purification in patients at high risk of bleeding.
Methods: One hundred and fifty-two patients at high risk of bleeding were divided into local citrate group (group A, n=68) and heparin group (group B, n=84). Clotting function, change of pH, ionized sodium, bicarbonate ion, ionized calcium, activated clotting time (ACT) and complications were monitored before and during treatment.
Results: Compared to the group A, the incidence of clotting in filter and chamber, the degree of bleeding or fresh bleeding were significantly reduced in the group B (P<0.05). ACT of post-filter at 4, 8 and 12 h during the treatment in the group A was significantly extended compared with that without treatment (P<0.05), while there was no significant change in group B (P>0.05). The pH value, the levels of ionized sodium, bicarbonate ion and ionized calcium during the treatment were maintained in normal range in both group A and group B.
Conclusion: Local citrate-based continuous blood purification can achieve effective anticoagulation and decrease the incidence of bleeding. It is an ideal choice for patients at high risk of bleeding.
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Affiliation(s)
- Shangping Zhao
- (Center of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Hao Ou
- (Center of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Yue Peng
- (Center of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Zuoliang Liu
- (Center of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Mingshi Yang
- (Center of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Xuefei Xiao
- (Center of Critical Care Medicine, Third Xiangya Hospital, Central South University, Changsha 410013, China
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22
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Liang LY, Lao WQ, Meng Z, Zhang LN, Hou LL, Ou H, Liu ZL, He ZW, Luo XY, Fang JP. [Analysis of the influence of iron overload in glucose metabolism in thalassemia major patients]. Zhonghua Er Ke Za Zhi 2017; 55:419-422. [PMID: 28592008 DOI: 10.3760/cma.j.issn.0578-1310.2017.06.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: This study aimed at determining the characteristics of the glucose homeostasis and its relationship with iron overload of the patients with β-thalassemia major (β-TM). Method: From Sun Yat-sen Memorial Hospital between January 2014 and December 2015, a total of 57 transfusion-dependent β-TM patients with 5-18 years old were enrolled in this study and fasting blood glucose(FBG) and insulin level, serum ferritin (SF), serum iron, transferrin, total iron binding capacity, unsaturated iron binding capacity were determined.Insulin resistance index (IRI), insulin sensitivity index and β-cell function index (BFI) were also estimated. Besides, in 36 patients cardiac T2* and liver T2* were estimated. Result: (1) Four patients(7%) with β-TM were diagnosed diabetes mellitus, and 14(24%) had impaired fasting glucose. (2) The incidence of abnormal glucose metabolism was significantly different according to levels of SF and degrees of the cardiac iron overload(χ(2)=9.737, P<0.05; χ(2)=17.027, P<0.05). It rose while the level of SF increased and the degree of cardiac iron overload aggravated. (3) The incidence of abnormal glucose level was not significantly different in cases with different degree of liver iron overload.The severe group of liver iron overload had significantly higher levels of INS, HOMA-βFI, HOMA-ISI, HOMA-βFI than the non-severe group (Z=-2.434, -2.515, F=8.658, all P<0.05), while no differences were found in the level of FBG, HOMA-βFI between two groups. (4) The result of logistic regression analysis indicated that the cardiac T2* was a significant predictor for the incidence of abnormal glucose metabolism in TM patients (P=0.035, OR=1.182%, 95%CI=1.048 to 1.332). Conclusion: The high prevalence of abnormal glucose metabolism in β-TM patients was mainly closely related with the internal iron overload, especially in organs.The cardiac T2* was an independent risk factor for the incidence of abnormal glucose metabolism in TM patients.
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Affiliation(s)
- L Y Liang
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
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23
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Ou H, Zhao S, Peng Y, Xiao X, Wang Q, Liu H, Xiao X, Yang M. Comparison of bone marrow tissue- and adipose tissue-derived mesenchymal stem cells in the treatment of sepsis in a murine model of lipopolysaccharide-induced sepsis. Mol Med Rep 2016; 14:3862-70. [DOI: 10.3892/mmr.2016.5694] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 07/29/2016] [Indexed: 11/05/2022] Open
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24
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Ou H, Sahli M, Gelin JC, Barrière T. Experimental analysis and finite element simulation of the co-sintering of bi-material components. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.08.023] [Citation(s) in RCA: 9] [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] [Indexed: 10/24/2022]
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25
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Wu Y, Ou H. Novel effects of COX-2-selective inhibitor NS-398 on IL-1β-induced COX-2 and IL-8 expression in human ovarian granulosa cells. J Reprod Immunol 2010. [DOI: 10.1016/j.jri.2010.06.117] [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: 10/19/2022]
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26
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Lin T, Li R, Long H, Ou H. Three-dimensional transient sealing analysis of the bolted flange connections of reactor pressure vessel. Nuclear Engineering and Design 2006. [DOI: 10.1016/j.nucengdes.2006.03.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Ma PL, Yang MS, Li Q, Ou H, Peng Y, Su JW, Zhao JZ. [Study on safety of apnea test in clinical determination of brain death]. Zhongguo Wei Zhong Bing Ji Jiu Yi Xue 2006; 18:260-3. [PMID: 16700984] [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: 05/09/2023]
Abstract
OBJECTIVE To determine the occurrence of severe complications such as hypotension, pulmonary artery hypertension as well as hypercapnia during apnea test in the affirmation of brain death and to investigate the possible effective prophylactic interventions. METHODS Conventional apnea test was performed in 15 clinically suspected brain death patients. Stable circulation was achieved by adjusting preload only (n=4) or combined with titrating norepinephrine (NE, n=11). Blood gas was respectively analyzed before apnea test, 10 minutes after 100% fraction of oxygen (FiO(2)) ventilation, at each 2-minute interval after disconnecting ventilator and 5 minutes after reventilation. Hemodynamic parameters and dosage of NE were recorded at the same time points. Plasma concentration of lactate was measured before and at the end of apnea test. RESULTS Spontaneous breath occurred in 1 case among 15 suspected brain death patients. Partial pressure of carbon dioxide (PaCO(2)) reached higher than 60 mm Hg (1 mm Hg=0.133 kPa) within 8 minutes in positive apnea test patients (P<0.01). pH significantly decreased (P<0.05), but partial pressure of oxygen (PaO(2)) maintained higher than 100 mm Hg during the test. Heart rate (HR) and mean artery pressure (MAP) slightly lowered (P>0.05), but pulmonary artery pressure (PAP) markedly elevated (P<0.05) at the end of the test in comparison with their base lines. On the other hand, HR and MAP increased in the negative apnea test case after ventilator disconnection. Severe arrhythmia events did not occur in all the cases. There was no change in the dosage of NE infusion, the range of which was 0.10-0.60 microg.kg(-1).min(-1) with the mean level of (0.23+/-0.17) microg.kg(-1).min(-1). The trend of HR, MAP, PAP and pulmonary arterial wedge pressure (PAWP) alterations was the same in patients no matter whether or not NE was used. HR, MAP and PAWP lowered, while PAP enhanced. Plasma lactate level was not significantly altered at the end of the test compared with the base line (from (1.41+/-0.05) mmol/L to (1.47+/-0.07) mmol/L). CONCLUSION Adequate oxygenation could be maintained during conventional apnea test. The risk of inducing severe hypotension is low in non brain death patients. Based on adequate preload, low dose of NE infusion could prevent patients with high risk circulation instability from severe hypotension.
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Affiliation(s)
- Peng-lin Ma
- Department of Emergency and Critical Care Medicine, The Second Affiliated Hospital, General Hospital of PLA, Beijing 100091, China.
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28
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Ou H, Haendeler J, Aebly MR, Kelly LA, Cholewa BC, Koike G, Kwitek-Black A, Jacob HJ, Berk BC, Miano JM. Retinoic acid-induced tissue transglutaminase and apoptosis in vascular smooth muscle cells. Circ Res 2000; 87:881-7. [PMID: 11073883 DOI: 10.1161/01.res.87.10.881] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Retinoids exert antiproliferative and prodifferentiating effects in vascular smooth muscle cells (SMCs) and reduce neointimal mass in balloon-injured blood vessels. The mechanisms through which retinoids carry out these effects are unknown but likely involve retinoid receptor-mediated changes in gene expression. Here we report the cloning, chromosomal mapping, and biological activity of the retinoid-response gene rat tissue transglutaminase (tTG). Northern blotting studies showed that tTG is rapidly and dose-dependently induced in a protein synthesis-independent manner after stimulation with the natural retinoid all-trans retinoic acid (atRA). The induction of tTG was selective for atRA and its stereoisomers 9-cis and 13-cis RA, because little or no elevation in mRNA expression was observed with a panel of growth factors. Western blotting and immunofluorescence confocal microscopy showed an accumulation of cytosolic tTG protein after atRA stimulation. Radiolabeled cross-linking studies revealed a corresponding elevation in in vitro tTG activity. The increase in tTG activity was reduced in the presence of 2 distinct inhibitors of tTG (monodansylcadaverine and cystamine). atRA-induced tTG mRNA and protein expression were followed by a significant elevation in SMC apoptosis. Such retinoid-induced programmed cell death could be partially inhibited with each tTG inhibitor and was completely blocked when both inhibitors were used simultaneously. These results establish a role for atRA in the sequential stimulation of tTG and apoptosis in cultured SMCs. atRA-mediated apoptosis in SMCs seems to require the participation of active tTG, suggesting a potential mechanistic link between this retinoid-inducible gene and programmed cell death.
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MESH Headings
- Animals
- Apoptosis
- Blotting, Northern
- Blotting, Western
- Cadaverine/analogs & derivatives
- Cadaverine/pharmacology
- Cells, Cultured
- Chromosome Mapping
- Cloning, Molecular
- Cystamine/pharmacology
- Dose-Response Relationship, Drug
- Enzyme Inhibitors/pharmacology
- GTP-Binding Proteins/antagonists & inhibitors
- GTP-Binding Proteins/genetics
- GTP-Binding Proteins/metabolism
- Growth Substances/metabolism
- Growth Substances/pharmacology
- Male
- Molecular Sequence Data
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Protein Glutamine gamma Glutamyltransferase 2
- RNA, Messenger/metabolism
- Rats
- Rats, Sprague-Dawley
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Transcription, Genetic/drug effects
- Transglutaminases/antagonists & inhibitors
- Transglutaminases/genetics
- Transglutaminases/metabolism
- Tretinoin/metabolism
- Tretinoin/pharmacology
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Affiliation(s)
- H Ou
- Center for Cardiovascular Research, University of Rochester Medical Center, Rochester, NY, USA
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29
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Wang P, Liu B, Ou H, Tong L, Yang J, Tang C. Nitric oxide synthase/nitric oxide pathway mediates intussusception pathogenesis in rats. Chin Med J (Engl) 1999; 112:1016-9. [PMID: 11721463] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
OBJECTIVE To study the role of nitric oxide synthase/nitric oxide pathway in the pathophysiological process of intussusception (IN). METHODS The IN model of rat was induced by lipopolysaccharide (LPS). The content of NOx in plasma and the NOS activity in colic smooth muscle tissues were measured. The content of cGMP was determined by radioimmunoassay. RESULTS LPS (10 mg/kg, i.p.) induced IN in up to 40% of the rats 6 hours after treatment with LPS. The incidence of IN was significantly increased by 58.3% (P < 0.05) and by 66.8% (P < 0.01) in L-arginine (L-Arg)-treated rats (2% in drinking water) and in sodium nitroprusside (NSP)-treated rats (1 mg/kg, i.p.), respectively, but it is significantly decreased by 66.8% (P < 0.01) after administration of M-omega-nitro-L-arginine methyl ester (L-NAME, 15 mg/kg, i.p.), an inhibitor of nitric oxide synthase (NOS) activity. Furthermore, LPS increased total NOS activity, NOx production and cGMP levels in plasma or in colic smooth muscle tissues. These parameters in LPS-IN rats were significantly elevated by 38.8%, 50.7%, and 48.7% respectively (P < 0.01) compared with LPS-non-IN rats. CONCLUSION NOS/NO pathway plays an important role in the process of IN, and inhibition of NO production may serve as a possible approach to prevent IN.
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Affiliation(s)
- P Wang
- Department of Pediatric Surgery and Central Laboratory, First Clinical Hospital, Beijing Medical University, Beijing 100083, China
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30
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Abstract
PURPOSE Laparoscopic colectomy, as many claim, is technically feasible. However, none can definitely attest to its superiority over or even equivalence to traditional open laparotomy. The goal of this study is to assess results of laparoscopic colectomy via a new approach compared with traditional colectomy. METHODS The study involves 12 cases of laparoscopic mini laparotomy with colectomy and another 12 cases of traditional colectomy. Laparoscopic mini laparotomy is performed with the same equipment used in laparoscopic cholecystectomy. Through a small 5-cm to 6-cm incision, the surgeon's left hand inserts into the peritoneal cavity and participates in the laparoscopic mobilization of the bowel along with other laparoscopic instruments. Mesenteric division and bowel anastomosis are performed through the same incision extracorporeally. RESULTS The preliminary result of the study shows that, compared with traditional surgery, laparoscopic mini laparotomy with colectomy offers reduction in the frequency of usage of intramuscular analgesics, better cosmetic results, earlier food intake, and shorter hospital stay. The only disadvantage of laparoscopic mini laparotomy with colectomy is that it takes longer operative time, which may decrease with more experience. CONCLUSION Laparoscopic mini laparotomy with colectomy is an alternative method of laparoscopic colectomy. It seems to offer a similar morbidity and better results compared with colectomy in open laparotomy.
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Affiliation(s)
- H Ou
- Surgical Department, Chino Valley Medical Center, California
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31
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Kok VC, Liu TW, Lin HH, Ou H, Cheng SH, Liu MC, Huang AT. Concomitant renal cell carcinoma and metastatic epithelioid angiosarcoma with microangiopathy. J Formos Med Assoc 1995; 94:48-52. [PMID: 7613233 DOI: pmid/7613233] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Epithelioid angiosarcoma is an extremely rare clinical entity. Recognized only in recent years, epithelioid angiosarcoma mimicks epithelial tumors, both morphologically and immunohistochemically. It is very aggressive, assuming a rapid, metastatic and fatal course. This is a report of a case with an unequivocal diagnosis of epithelioid angiosarcoma and concomitant renal cell carcinoma. Reports of cancer with double origins of this combination, in patients without inherited von Hippel-Lindau disease, are extremely rare in the English literature. A review of the literature encompassing all cases of epithelioid angiosarcoma since 1983 is included.
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Affiliation(s)
- V C Kok
- Department of Medical Oncology, Koo Foundation, Sun Yat-Sen Cancer Center, Taipei, Taiwan, R.O.C
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32
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Ou H. A new dissecting technique of the gallbladder in laparoscopic cholecystectomy. Surg Laparosc Endosc Percutan Tech 1994; 4:51-3. [PMID: 8167865] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Laparoscopic cholecystectomy is still a challenge to most general surgeons because of the complexity and length of the procedure. We have developed a timesaving technique of dissecting the gallbladder by using a dissection forceps. This new method reduces the operative time by half.
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Affiliation(s)
- H Ou
- Surgical Department, Chino Valley Medical Center, CA
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