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Wang G, Hou Y, Shin C. Exploring Sustainable Development Pathways for Agri-Food Supply Chains Empowered by Cross-Border E-Commerce Platforms: A Hybrid Grounded Theory and DEMATEL-ISM-MICMAC Approach. Foods 2023; 12:3916. [PMID: 37959035 PMCID: PMC10647628 DOI: 10.3390/foods12213916] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
As cross-border e-commerce platforms become increasingly integrated into the agricultural supply chain, the establishment of a sustainable supply chain ecosystem is of paramount importance. This study, grounded in the platform theory and the supply chain ecosystem theory, combines the grounded theory and the DEMATEL-ISM-MICMAC model to thoroughly analyze the complex mechanisms driving sustainable development. Utilizing the grounded theory, we construct a system of driving factors comprising five primary indicators and eighteen secondary indicators. The hybrid model reveals the interrelationships, significance, system hierarchy, and dependence-driving relationships among these factors. Notably, the driving factor system is categorized into a six-level hierarchical structure, encompassing profound elements, such as policy optimization and digital empowerment, as well as surface-level factors, such as simplification of customs procedures and consumer demand forecasting. Based on the analysis results, this research proposes a set of pathways to achieve the sustainability of the supply chain. These strategies involve improving cross-border agricultural e-commerce policy frameworks, enhancing digital-driven supply-demand coordination, strengthening logistics infrastructure and transparency, and cultivating brand influence. The study's findings not only enrich the relevant theories but also provide practical guidance for the coordinated advancement of economic, social, environmental, and resilient development. Furthermore, they are conducive to advancing the United Nations Sustainable Development Goals.
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Affiliation(s)
- Gaofeng Wang
- School of Management, Henan University of Technology, Zhengzhou 450001, China;
| | - Yanning Hou
- School of Management, Zhengzhou University, Zhengzhou 450001, China;
| | - Changhoon Shin
- College of Ocean Science and Engineering, Korea Maritime & Ocean University, Busan 49112, Republic of Korea
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Hou YN, You AL, Wang Y. [Knobloch syndrome on multimodal imaging: a case report]. Zhonghua Yan Ke Za Zhi 2022; 58:1062-1064. [PMID: 36480889 DOI: 10.3760/cma.j.cn112142-20220128-00041] [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: 12/13/2022]
Abstract
A 12-year-old boy presented to the hospital because of poor vision for half a year. Examination revealed nystagmus in both eyes. Examination of the anterior segment of both eyes showed no obvious abnormalities, and the vitreous bodies of both eyes were concentrated and agglutinated. Fundus showed clear boundary of optic disc, pale white, leopard striated retina, and characteristic atrophy of pigment epithelium, choroid, and macular atrophy. Knobloch syndrome was confirmed by multimodal imaging and genetic testing.
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Affiliation(s)
- Y N Hou
- Hefei Aier Eye Hospital, Hefei 230071, China
| | - A L You
- Chongqing Aier Eye Hospital, Chongqing 401531, China
| | - Y Wang
- Chongqing Aier Eye Hospital, Chongqing 401531, China
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Hou YN, Yang KM, Song J, Wang H, Liu Y, Fan TX. A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins. Sci Rep 2021; 11:16053. [PMID: 34362969 PMCID: PMC8346628 DOI: 10.1038/s41598-021-95439-z] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 06/13/2021] [Indexed: 11/09/2022] Open
Abstract
Originated at heterogeneous interfaces with distinct coefficient of thermal expansion (CTE), thermal mismatch stress is one of the critical influential factors to mechanical properties of metal matrix composites (MMCs). This stress is normally accommodated plastically by various defects, for example, high-density dislocations and twins in Al near heterogeneous interfaces in SiC/Al composites. Basic knowledge on the influence of defect characteristics is important but difficult to extrapolate from experimental results. However, existed theoretical models more focus on the influence of dislocation density, but less focus on defects variety, volume and distribution. In this paper, we propose a physics-based crystal plasticity model that has the capability of dealing with thermal mismatch stress induced dislocations and twins (denoted as TMDT model). The proposed TMDT model that is implemented in the Visco-Plastic Self-Consistent (VPSC) method considers defect heterogeneous distribution (gradient range), defect type (dislocations vs. twins) and defect volume fraction (twin spacing vs. twin volume). We demonstrate the validity and the capability of the VPSC-TMDT model in SiC/Al composites with thermal mismatch induced dislocations or twins. Furthermore, this model predicts the ultra-high strength of Graphene/Copper composites with high-density nanoscale twins, which is in turn the future aim for such nanocomposites.
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Affiliation(s)
- Y N Hou
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - K M Yang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - J Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - H Wang
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Y Liu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - T X Fan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
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Shi W, Wu H, Liu S, Wu Z, Wu H, Liu J, Hou Y. Progesterone Suppresses Cholesterol Esterification in APP/PS1 mice and a cell model of Alzheimer's Disease. Brain Res Bull 2021; 173:162-173. [PMID: 34044033 DOI: 10.1016/j.brainresbull.2021.05.020] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/27/2021] [Accepted: 05/21/2021] [Indexed: 01/01/2023]
Abstract
AIMS Cholesteryl ester(CE), generated from the mitochondria associated membrane (MAM), is involved in the pathogenesis of Alzheimer's Disease (AD). In theory, the different neuroprotective effects of progesterone in AD are all linked to MAM, yet the effect on cholesterol esterification has not been reported. Therefore, this study was aimed to investigate the regulation of progesterone on intracerebral CE in AD models and the underlying mechanism. METHODS APP/PS1 mice and AD cell model induced by Aβ 25-35 were selected as the research objects. APP/PS1 mice were daily administrated intragastrically with progesterone and The Morris Water Maze test was performed to detect the learning and memory abilities. Intracellular cholesterol was measured by Cholesterol/Cholesteryl Ester Quantitation Assay. The structure of MAMs were observed with transmission electron microscopy. The expression of acyl-CoA: cholesterol acyltransferase 1 (ACAT1), ERK1/2 and p-ERK1/2 were detected with western blotting, immunohistochemistry or immunofluorescence. RESULTS Progesterone suppressed the accumulation of intracellular CE, shortened the length of abnormally prolonged MAM in cortex of APP/PS1 mice. Progesterone decreased the expression of ACAT1, which could be blocked by progesterone receptor membrane component 1 (PGRMC1) inhibitor AG205. The ERK1/2 pathway maybe involved in the progesterone mediated regulation of ACAT1 in AD models, rather than the PI3K/Akt and the P38 MEPK pathways. SIGNIFICANCE The results supported a line of evidence that progesterone regulates CE level and the structure of MAM in neurons of AD models, providing a promising treatment against AD on the dysfunction of cholesterol metabolism.
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Affiliation(s)
- Wenjing Shi
- Department of Pharmacology, Hebei Medical University, Shijiazhuang 050017, Hebei Province, China; Department of Pharmacy, Hebei General Hospital, Shijiazhuang 050051, Hebei Province, China.
| | - Hang Wu
- Department of Pharmacy, Heze University, Heze 274000, Shandong Province, China.
| | - Sha Liu
- Department of Pharmacy, the Third Hospital of Shijiazhuang, Shijiazhuang 050000, Hebei Province, China.
| | - Zhigang Wu
- Department of Pharmacy, Hebei North University, Hebei Key Laboratory of Neuropharmacology, Zhangjiakou 075000, China.
| | - Honghai Wu
- Department of Pharmacy, Bethune International Peace Hospital, Shijiazhuang 050082, Hebei Province, China.
| | - Jianfang Liu
- Department of Pharmacy, Bethune International Peace Hospital, Shijiazhuang 050082, Hebei Province, China.
| | - Yanning Hou
- Department of Pharmacology, Hebei Medical University, Shijiazhuang 050017, Hebei Province, China; Department of Pharmacy, Bethune International Peace Hospital, Shijiazhuang 050082, Hebei Province, China.
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Wu Z, Wu H, Sun S, Wu H, Shi W, Song J, Liu J, Zhang Y, Bian F, Jia P, Hou Y. Progesterone attenuates Aβ25–35-induced neuronal toxicity by activating the Ras signalling pathway through progesterone receptor membrane component 1. Life Sci 2020; 253:117360. [DOI: 10.1016/j.lfs.2020.117360] [Citation(s) in RCA: 2] [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] [Received: 11/11/2019] [Revised: 01/16/2020] [Accepted: 01/24/2020] [Indexed: 12/23/2022]
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Hong Y, Liu Y, Yu D, Wang M, Hou Y. The neuroprotection of progesterone against Aβ-induced NLRP3-Caspase-1 inflammasome activation via enhancing autophagy in astrocytes. Int Immunopharmacol 2019; 74:105669. [PMID: 31176046 DOI: 10.1016/j.intimp.2019.05.054] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [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: 03/03/2019] [Revised: 05/17/2019] [Accepted: 05/27/2019] [Indexed: 12/21/2022]
Abstract
Neuroinflammation and autophagy dysfunction are known to be involved in the pathological procession of Alzheimer's disease (AD). Progesterone (PG), neuroactive steroids, exerts a characteristic neuroprotective function in improving AD syndrome. The NOD-like receptor pyrin 3 (NLRP3)-Caspase-1 inflammasome has specific relevance to AD pathological procession. However, the exact role of PG in regulating NLRP3-Caspase-1 inflammasome remains to be elucidated. We demonstrated Aβ up-regulated IL-1β expression in astrocytes by activating NLRP3-Caspase-1 inflammasome. However, pharmacological activation of autophagy by Rapamycin (RAPA) efficiently suppressed Aβ-, lipopolysaccharides (LPS)-induced IL-1β expression via regulating NLRP3-Caspase-1 inflammasome in astrocytes. Remarkably, PG significantly inhibited Aβ-induced NLRP3-Caspase-1 inflammasome activation. Autophagy inhibitor 3-MA blocked the protective effects of PG in mediating NLRP3 inflammasome and IL-1β processing. Taken together, our observations suggest that autophagy-lysosome pathway is one specific molecular mechanism in regulating Aβ-induced NLRP3-Caspase-1 inflammasome activation in astrocytes, particularly uncover the potential neuroprotection of PG in regulating upstream signaling leading to the sequence events of neuroinflammation. That neuroprotective mechanism of PG in regulating NLRP3-Caspase-1 inflammasome can be a potential therapeutic target for ameliorating the pathological procession of AD.
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Affiliation(s)
- Yang Hong
- Department of Clinical Pharmacology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Yunjiang Liu
- Breast Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China.
| | - Dongzhen Yu
- Physical Education Department, Quanzhou Normal University, Quanzhou, Fujian Province, China
| | - Mingxia Wang
- Department of Clinical Pharmacology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Yanning Hou
- Department of Pharmacy, Bethune International Peace Hospital, Shijiazhuang, Hebei Province, China
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Zhang M, Liu J, Zhou MM, Wu H, Hou Y, Li YF, Yin Y, Zheng L, Cai J, Liao FF, Liu FY, Yi M, Wan Y. Anxiolytic effects of hippocampal neurosteroids in normal and neuropathic rats with spared nerve injury. J Neurochem 2017; 141:137-150. [PMID: 28129443 DOI: 10.1111/jnc.13965] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 12/16/2016] [Accepted: 01/11/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Meng Zhang
- Neuroscience Research Institute; Peking University; Beijing China
- Department of Pathology; Beijing Children's Hospital, Capital Medical University; Beijing China
| | - Jia Liu
- Institute of Systems Biomedicine; Peking University; Beijing China
| | - Meng-Meng Zhou
- Neuroscience Research Institute; Peking University; Beijing China
| | - Honghai Wu
- Department of Pharmacy; Bethune International Peace Hospital; Shijiazhuang China
| | - Yanning Hou
- Department of Pharmacy; Bethune International Peace Hospital; Shijiazhuang China
| | - Yun-Feng Li
- Department of New Drug Evaluation; Beijing Institute of Pharmacology and Toxicology; Beijing China
| | - Yuxin Yin
- Institute of Systems Biomedicine; Peking University; Beijing China
| | - Lemin Zheng
- Institute of Cardiovascular Sciences and Institute of Systems Biomedicine; Key Laboratory of Molecular Cardiovascular Sciences of the Ministry of Education; Peking University; Beijing China
| | - Jie Cai
- Neuroscience Research Institute; Peking University; Beijing China
| | - Fei-Fei Liao
- Neuroscience Research Institute; Peking University; Beijing China
| | - Feng-Yu Liu
- Neuroscience Research Institute; Peking University; Beijing China
| | - Ming Yi
- Neuroscience Research Institute; Peking University; Beijing China
| | - You Wan
- Neuroscience Research Institute; Peking University; Beijing China
- Key Laboratory for Neuroscience; Ministry of Education/National Health and Family Planning Commission; Peking University; Beijing China
- Department of Neurobiology; School of Basic Medical Sciences; Peking University; Beijing China
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Zhang M, Liu J, Zhou MM, Wu H, Hou Y, Li YF, Yin Y, Zheng L, Liu FY, Yi M, Wan Y. Elevated Neurosteroids in the Lateral Thalamus Relieve Neuropathic Pain in Rats with Spared Nerve Injury. Neurosci Bull 2016; 32:311-22. [PMID: 27325509 DOI: 10.1007/s12264-016-0044-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 03/16/2016] [Accepted: 05/11/2016] [Indexed: 01/01/2023] Open
Abstract
Neurosteroids are synthesized in the nervous system from cholesterol or steroidal precursors imported from peripheral sources. These compounds are important allosteric modulators of γ-aminobutyric acid A receptors (GABAARs), which play a vital role in pain modulation in the lateral thalamus, a main gate where somatosensory information enters the cerebral cortex. Using high-performance liquid chromatography/tandem mass spectrometry, we found increased levels of neurosteroids (pregnenolone, progesterone, deoxycorticosterone, allopregnanolone, and tetrahydrodeoxycorticosterone) in the chronic stage of neuropathic pain (28 days after spared nerve injury) in rats. The expression of the translocator protein TSPO, the upstream steroidogenesis rate-limiting enzyme, increased at the same time. In vivo stereotaxic microinjection of neurosteroids or the TSPO activator AC-5216 into the lateral thalamus (AP -3.0 mm, ML ±3.0 mm, DV 6.0 mm) alleviated the mechanical allodynia in neuropathic pain, while the TSPO inhibitor PK 11195 exacerbated it. The analgesic effects of AC-5216 and neurosteroids were significantly attenuated by the GABAAR antagonist bicuculline. These results suggested that elevated neurosteroids in the lateral thalamus play a protective role in the chronic stage of neuropathic pain.
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Affiliation(s)
- Meng Zhang
- Neuroscience Research Institute, Peking University, Beijing, 100191, China
| | - Jia Liu
- Institute of Systems Biomedicine, Peking University, Beijing, 100191, China
| | - Meng-Meng Zhou
- Neuroscience Research Institute, Peking University, Beijing, 100191, China
| | - Honghai Wu
- Department of Pharmacy, Bethune International Peace Hospital Shijiazhuang, Shijiazhuang, 050082, China
| | - Yanning Hou
- Department of Pharmacy, Bethune International Peace Hospital Shijiazhuang, Shijiazhuang, 050082, China
| | - Yun-Feng Li
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, Beijing, 100007, China
| | - Yuxin Yin
- Institute of Systems Biomedicine, Peking University, Beijing, 100191, China
| | - Lemin Zheng
- Institute of Cardiovascular Sciences and Institute of Systems Biomedicine, and Key Laboratory of Molecular Cardiovascular Sciences of the Ministry of Education, Peking University, Beijing, 100191, China
| | - Feng-Yu Liu
- Neuroscience Research Institute, Peking University, Beijing, 100191, China
| | - Ming Yi
- Neuroscience Research Institute, Peking University, Beijing, 100191, China.
| | - You Wan
- Neuroscience Research Institute, Peking University, Beijing, 100191, China.
- Key Laboratory for Neuroscience, Ministry of Education/National Health and Family Planning Commission, School of Basic Medical Sciences, Peking University, Beijing, 100191, China.
- Department of Neurobiology, School of Basic Medical Sciences, Peking University, Beijing, 100191, China.
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Hong Y, Wang X, Sun S, Xue G, Li J, Hou Y. Progesterone exerts neuroprotective effects against Aβ-induced neuroinflammation by attenuating ER stress in astrocytes. Int Immunopharmacol 2016; 33:83-9. [DOI: 10.1016/j.intimp.2016.02.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 01/14/2016] [Accepted: 02/01/2016] [Indexed: 01/24/2023]
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Li J, Yu Y, Wang B, Wu H, Xue G, Hou Y. Selective regulation of neurosteroid biosynthesis under ketamine-induced apoptosis of cortical neurons in vitro. Mol Med Rep 2015; 13:1586-92. [PMID: 26709052 PMCID: PMC4732866 DOI: 10.3892/mmr.2015.4712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 03/24/2015] [Accepted: 11/24/2015] [Indexed: 11/05/2022] Open
Abstract
Numerous studies have suggested that ketamine administration can induce neuroapoptosis in primary cultured cortical neurons. Neurosteroids modulate neuronal function and serve important roles in the central nervous system, however the role of neurosteroids in neuroapoptosis induced by ketamine remains to be elucidated. The present study aimed to explore whether neurosteroidogenesis was a pivotal mechanism for neuroprotection against ketamine-induced neuroapoptosis, and whether it may be selectively regulated under ketamine-induced neuroapoptosis conditions in primary cultured cortical neurons. To study this hypothesis, the effect of ketamine exposure on neurosteroidogenesis in primary cultured cortical neurons was investigated. Cholesterol, a substrate involved in the synthesis of neurosteroids, was added to the culture medium, and neurosteroids were quantified using high-performance liquid chromatography-tandem mass spectrometry analysis. The data demonstrated that cholesterol blocked ketamine-induced neuroapoptosis by promoting the synthesis of various neurosteroids, and the pathway of neurosteroid testosterone conversion into estradiol was inhibited by ketamine exposure. These data suggest that endogenous neurosteroids biosynthesis is critical for neuroprotection against ketamine-induced neuroapoptosis and inhibiting the biosynthesis of neuroprotective-neurosteroid estradiol is of notable importance for ketamine-induced neuroapoptosis.
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Affiliation(s)
- Jianli Li
- Department of Anesthesiology, Hebei General Hospital, Shijiazhuang, Hebei 050051, P.R. China
| | - Yang Yu
- Department of Pharmacy, Bethune International Peace Hospital of Chinese People's Liberation Army, Shijiazhuang, Hebei 050082, P.R. China
| | - Bei Wang
- Department of Gynecology, Hebei General Hospital, Shijiazhuang, Hebei 050051, P.R. China
| | - Honghai Wu
- Department of Pharmacy, Bethune International Peace Hospital of Chinese People's Liberation Army, Shijiazhuang, Hebei 050082, P.R. China
| | - Gai Xue
- Department of Pharmacy, Bethune International Peace Hospital of Chinese People's Liberation Army, Shijiazhuang, Hebei 050082, P.R. China
| | - Yanning Hou
- Department of Pharmacy, Bethune International Peace Hospital of Chinese People's Liberation Army, Shijiazhuang, Hebei 050082, P.R. China
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Qin Y, Chen Z, Han X, Wu H, Yu Y, Wu J, Liu S, Hou Y. Progesterone attenuates Aβ(25-35)-induced neuronal toxicity via JNK inactivation and progesterone receptor membrane component 1-dependent inhibition of mitochondrial apoptotic pathway. J Steroid Biochem Mol Biol 2015; 154:302-11. [PMID: 25576906 DOI: 10.1016/j.jsbmb.2015.01.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 12/25/2014] [Accepted: 01/05/2015] [Indexed: 11/21/2022]
Abstract
Progesterone, which acts as a neurosteroid in nervous system, has been shown to have neuroprotective effects in different experiments in vitro and in vivo. Our previous study demonstrates that progesterone exerts neuroprotections in Alzheimer's disease-like rats. Present study attempted to evaluate the protective effects of progesterone on Aβ-treated neurons and potential mechanisms involved in neuroprotection. Results showed that treatment with progesterone protected primary cultured rat cortical neurons against Aβ(25-35)-induced apoptosis. Furthermore, we observed that progesterone alleviated mitochondrial dysfunction by rescuing mitochondrial membrane potential under Aβ challenge. Moreover, progesterone could also attenuate Bax/Bcl-2 proteins ratio upregulation and inhibit the activation of caspase-3 in Aβ-treated neurons. These indicate that progesterone attenuates Aβ(25-35)-induced neuronal toxicity by inhibiting mitochondria-associated apoptotic pathway. Both classic progesterone receptors (classic PR) and progesterone receptor membrane component 1 (PGRMC1), a special progesterone membrane receptor, are broadly expressed throughout the brain. The protective effect of progesterone was partially abolished by PGRMC1 inhibitor AG205 rather than classic PR antagonist RU486 in this study. Additionally, progesterone protected neurons by inhibiting Aβ-induced activation of JNK, which was an upstream signaling component in Aβ-induced mitochondria-associated apoptotic pathway. But this process was independent of PGRMC1. Taken together, these results suggest that progesterone exerts a protective effect against Aβ(25-35)-induced insults at least in part by two complementary pathways: (1) progesterone receptor membrane component 1-dependent inhibition of mitochondrial apoptotic pathway, and (2) blocking Aβ-induced JNK activation. The present study provides new insights into the mechanism by which progesterone brings neuroprotection. This article is part of a Special Issue entitled 'Steroids & Nervous System'.
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Affiliation(s)
- Yabin Qin
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Zesha Chen
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Xiaolei Han
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
| | - Honghai Wu
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
| | - Yang Yu
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
| | - Jie Wu
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Sha Liu
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Yanning Hou
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China; Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China.
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Xue G, Li J, Liu J, Wu H, Hou Y. [In vivo tracking of PKH26-labeled human umbilical cord mesenchymal stem cells after transplantation into rats with liver cirrhosis]. Zhonghua Gan Zang Bing Za Zhi 2015; 22:910-4. [PMID: 25654284 DOI: 10.3760/cma.j.issn.1007-3418.2014.12.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To observe the in vivo migration of human umbilical cord mesenchymal stem cells (hUCMSCs) labeled with the PKH26 red fluorescent dye after transplantation into rats with liver cirrhosis. METHODS Frozen hUCMSCs were resuscitated and labeled with PKH26. Labeling efficiency and fluorescent maintenance time of the PKH26-1abeled cells were measured. Morphology of the labeled and unlabeled (control) cells was observed by microscopy. The cell growth curve was determined using the MTT method. The PKH26-1abeled hUCMSCs were transplanted via tail vein injection into healthy (control) rats and rats with liver cirrhosis. Migration of the PKH26-1abeled hUCMSCs observed 48 h later in frozen liver sections under a fluorescence microscope. RESULTS The labeling ratio of PKH26 to hUCMSCs was 100%. Growth of the labeled cells was good. The cell morphology was not significantly different between the labeled and unlabeled cells; all cells were long and spindle-like. Cell proliferation was not impacted significantly by labeling.Fluorescence was maintained for at least 20 days, as detected by in vitro analysis. After transplantation into the rats, the PKH26-1abeled hUCMSCs were mainly distributed in the area surrounding the portal vein, the blood vessels, and the false lobule of the cirrhotic liver; a small amount ofhUCMSCs were present in the spleen and lung. CONCLUSION PKH26 is an ideal fluorescent dye to label hUCMSCs. The PKH26 labeling technique can be used to study the migration of hUCMSCs in cirrhotic liver.
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Affiliation(s)
- Gai Xue
- Department of Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China
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Yan C, Xue G, Wu L, Liu J, Hou Y. [DIFFERENTIATION OF HUMAN UMBILICAL CORD MESENCHYMAL STEM CELLS INTO HEPATOCYTES INDUCED BY RAT FIBROTIC LIVER TISSUE EXTRACTS]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2015; 29:878-883. [PMID: 26540984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To investigate the differentiation potential of human umbilical cord mesenchymal stem cells (HUCMSCs) into hepatocytes induced by rat fibrotic liver tissue extracts. METHODS Liver fibrosis was induced in the Sprague Dawley rats (weighting, 180-220 g) by repeated intraperitoneal injections of 3% thioacetamide-saline at a dose of 200 mg/kg twice a week for 4 weeks; fibrotic liver tissues were used to prepare liver homogenate supernatants. The HUCMSCs at passage 3 were cultured in DMEM/F12 with 10% fetal bovine serum (FBS) (control group) and in DMEM/F12 with 10% FBS and 50 g/L liver homogenate supernatants (experimental group) for 7 days. The morphological changes of the cells were recorded; the protein levels of cytokeratin 18 (CK18), alpha fetoprotein (AFP), and CYP3A4 were measured using Western blot. The glycogen storing ability of the cells was detected by periodic acid-schiff (PAS) staining. Furthermore, the synthesis of albumin (ALB) and blood urea nitrogen (BUN) was measured. RESULTS In experimental group, after 1 day of induction, the stem cells of fusiform shape began to lose sharp edges and progressively shrunk, and then they changed into hepatocyte-like cells with round and irregular shape at 7 days. Positive expressions of AFP, CK18, and CYP3A4 were observed in the experimental group, but negative expression in the control group. The concentrations of BUN and ALB were (0.43 ± 0.07) mmol/L and (8.08 ± 0.41) µg/mL in the control group and were (2.52 ± 0.20) mmol/L and (41.48 ± 4.11) µg/mL in the experimental group, showing significant differences (t=24.160, P = 0.000; t = 19.810, P = 0.000). PAS staining results showed navy blue nucleus and lavender cytoplasm in the control group, but dark purple cell body and visible nucleus in the experimental group. CONCLUSION HUCMSCs could differentiate into hepatocyte-like cells induced by rat fibrotic liver tissue extracts, which have hepatocyte biomarkers (AFP, CK18, and CYP3A4) and hepatocyte-specific functions of glycogen storage, urea production and ALB secretion, so they could partially replace the function of hepatocytes, that may be one of the therapeutic mechanisms of stem cell transplantation.
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Wang X, Wu H, Xue G, Hou Y. Progesterone promotes neuronal differentiation of human umbilical cord mesenchymal stem cells in culture conditions that mimic the brain microenvironment. Neural Regen Res 2015; 7:1925-30. [PMID: 25624820 PMCID: PMC4298884 DOI: 10.3969/j.issn.1673-5374.2012.25.001] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Accepted: 05/04/2011] [Indexed: 12/16/2022] Open
Abstract
In this study, human umbilical cord mesenchymal stem cells from full-term neonates born by vaginal delivery were cultured in medium containing 150 mg/mL of brain tissue extracts from Sprague-Dawley rats (to mimic the brain microenvironment). Immunocytochemical analysis demonstrated that the cells differentiated into neuron-like cells. To evaluate the effects of progesterone as a neurosteroid on the neuronal differentiation of human umbilical cord mesenchymal stem cells, we cultured the cells in medium containing progesterone (0.1, 1, 10 μM) in addition to brain tissue extracts. Reverse transcription-PCR and flow cytometric analysis of neuron specific enolase-positive cells revealed that the percentages of these cells increased significantly following progesterone treatment, with the optimal progesterone concentration for neuron-like differentiation being 1 μM. These results suggest that progesterone can enhance the neuronal differentiation of human umbilical cord mesenchymal stem cells in culture medium containing brain tissue extracts to mimic the brain microenvironment.
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Affiliation(s)
- Xianying Wang
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China ; The Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei Province, China
| | - Honghai Wu
- Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
| | - Gai Xue
- Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
| | - Yanning Hou
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China ; Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
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Li J, Wang B, Wu H, Yu Y, Xue G, Hou Y. 17β-estradiol attenuates ketamine-induced neuroapoptosis and persistent cognitive deficits in the developing brain. Brain Res 2014; 1593:30-9. [PMID: 25234726 DOI: 10.1016/j.brainres.2014.09.013] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 09/03/2014] [Accepted: 09/04/2014] [Indexed: 02/07/2023]
Abstract
Previous studies have demonstrated that the commonly used anesthetic ketamine can induce widespread neuroapoptosis in the neonatal brain and can cause persistent cognitive impairments as the animal matures. Therefore, searching for adjunctive neuroprotective strategies that inhibit ketamine-induced neuroapoptosis and persistent cognitive impairments is highly warranted. The primary goal of this study was to investigate the protective effect of 17β-estradiol against ketamine-induced neuroapoptosis and persistent cognitive impairments in adult rats. Starting from postnatal day 7, Sprague-Dawley male rat pups were given a daily administration of ketamine (75mg/kg, i.p.) or 17β-estradiol (600μg/kg, s.c.) in combination with ketamine (75mg/kg, i.p.). The animals were treated for three consecutive days. 24h after the last injection, the rats were decapitated, and the prefrontal cortex (PFC) was isolated to detect neuroapoptosis by cleaved caspase-3 immunohistochemistry and by using the TUNEL assay. The neuroactive steroid 17β-estradiol was quantified using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The protein levels of BDNF and pAkt were measured by western blot analysis. At two months of age (60 days), the learning and memory abilities were tested using the Morris water maze. The results showed that ketamine triggered significant neuroapoptosis in the neonatal PFC accompanied by the downregulation of 17β-estradiol, BDNF and pAkt. The co-administration of 17β-estradiol with ketamine attenuated these changes. Moreover, 17β-estradiol significantly reversed the learning and memory deficits observed at 60 days of age. In brief, our present data demonstrate that 17β-estradiol attenuates ketamine-induced neuroapoptosis and reverses long-term cognitive deficits in developing rats and thus may be a potential therapeutic and neuroprotective method for the treatment of neurodevelopmental disorders. This article is part of a Special Issue entitled SI: Brain and Memory.
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Affiliation(s)
- Jianli Li
- Department of Anesthesiology, Hebei General Hospital, Shijiazhuang, Hebei province 050051, China
| | - Bei Wang
- Department of Gynecology, Hebei General Hospital, Shijiazhuang, Hebei province 050051, China
| | - Honghai Wu
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang, Hebei province 050082, China
| | - Yang Yu
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang, Hebei province 050082, China
| | - Gai Xue
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang, Hebei province 050082, China
| | - Yanning Hou
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang, Hebei province 050082, China.
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Liu S, Wu H, Xue G, Ma X, Wu J, Qin Y, Hou Y. Metabolic alteration of neuroactive steroids and protective effect of progesterone in Alzheimer's disease-like rats. Neural Regen Res 2014; 8:2800-10. [PMID: 25206601 PMCID: PMC4146013 DOI: 10.3969/j.issn.1673-5374.2013.30.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 09/11/2013] [Indexed: 11/18/2022] Open
Abstract
A correlation between metabolic alterations of neuroactive steroids and Alzheimer's disease remains unknown. In the present study, amyloid beta (Aβ) 25–35 (Aβ25–35) injected into the bilateral hippocampus CA1 region significantly reduced learning and memory. At the biochemical level, hippocampal levels of pregnenolone were significantly reduced with Aβ25–35 treatment. Furthermore, progesterone was considerably decreased in the prefrontal cortex and hippocampus, and 17β-estradiol was significantly elevated. To our knowledge, this is the first report showing that Aβ25–35, a main etiological factor of Alzheimer's disease, can alter the level and metabolism of neuroactive steroids in the prefrontal cortex and hippocampus, which are brain regions significantly involved in learning and memory. Aβ25–35 exposure also increased the expression of inflammatory mediators, tumor necrosis factor-α and interleukin-1β. However, subcutaneous injection of progesterone reversed the upregulation of tumor necrosis factor-α and interleukin-1β in a dose-dependent manner. Concomitant with improved cognitive abilities, progesterone blocked Aβ-mediated inflammation and increased the survival rate of hippocampal pyramidal cells. We thus hypothesize that Aβ-mediated cognitive deficits may occur via changes in neuroactive steroids. Moreover, our findings provide a possible therapeutic strategy for Alzheimer's disease via neuroactive steroids, particularly progesterone.
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Affiliation(s)
- Sha Liu
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Honghai Wu
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
| | - Gai Xue
- Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
| | - Xin Ma
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Jie Wu
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Yabin Qin
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
| | - Yanning Hou
- Hebei Medical University, Shijiazhuang 050017, Hebei Province, China ; Department of Pharmacy, Bethune International Peace Hospital of Chinese PLA, Shijiazhuang 050082, Hebei Province, China
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Li J, Wu H, Xue G, Wang P, Hou Y. 17β-Oestradiol Protects Primary-Cultured Rat Cortical Neurons from Ketamine-Induced Apoptosis by Activating PI3K/Akt/Bcl-2 Signalling. Basic Clin Pharmacol Toxicol 2013; 113:411-8. [PMID: 23981522 DOI: 10.1111/bcpt.12124] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Accepted: 08/12/2013] [Indexed: 12/30/2022]
Affiliation(s)
- Jianli Li
- Hebei Medical University; Shijiazhuang Hebei Province China
- Hebei General Hospital; Shijiazhuang Hebei Province China
| | - Honghai Wu
- Department of Pharmacy; Bethune International Peace Hospital of Chinese PLA; Shijiazhuang Hebei Province China
| | - Gai Xue
- Department of Pharmacy; Bethune International Peace Hospital of Chinese PLA; Shijiazhuang Hebei Province China
| | - Pei Wang
- Hebei General Hospital; Shijiazhuang Hebei Province China
| | - Yanning Hou
- Hebei Medical University; Shijiazhuang Hebei Province China
- Department of Pharmacy; Bethune International Peace Hospital of Chinese PLA; Shijiazhuang Hebei Province China
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Wu L, Liu J, Zhang Y, Hou Y. Development of a HPLC/MS/MS method for simultaneous determination of tinidazole, dyclonine and chlorhexidine in rat plasma and its application in the pharmacokinetic research of a film-forming solution. J Pharm Biomed Anal 2012; 62:224-7. [DOI: 10.1016/j.jpba.2012.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 01/08/2012] [Accepted: 01/10/2012] [Indexed: 11/30/2022]
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Liu J, Sun J, Sui X, Wang Y, Hou Y, He Z. Predicting blood–brain barrier penetration of drugs by microemulsion liquid chromatography with corrected retention factor. J Chromatogr A 2008; 1198-1199:164-72. [DOI: 10.1016/j.chroma.2008.05.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2008] [Revised: 05/17/2008] [Accepted: 05/22/2008] [Indexed: 10/22/2022]
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Liu J, Wu H, Hou Y. Determination of total tiopronin in human plasma by LC–ESI–MS using tris (2-carboxy-ethyl) phosphine as reducing reagent and methyl acrylate as derivatization reagent for the thiol group. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 844:153-7. [PMID: 16904957 DOI: 10.1016/j.jchromb.2006.06.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2006] [Revised: 05/11/2006] [Accepted: 06/22/2006] [Indexed: 10/24/2022]
Abstract
A quantitative method for the determination of total tiopronin (TP) in human plasma was developed by liquid chromatography with electrospray ionisation (ESI) mass spectrometric detection. After reduction with tris (2-carboxy-ethyl) phosphine (TCEP) and derivatization with methyl acrylate (MA) for the thiol group of TP, plasma samples were processed successively by deproteinization and solid phase extraction. N-acetyl-l-cysteine (NAC) was selected as internal standard undergoing the same treatment as TP. The method was validated that it could meet the need of biological analysis. The lower limit of quantitation (LLOQ) of TP in plasma was 0.02microg/mL. Finally, the method was successfully applied to a pharmacokinetic study in 20 healthy Chinese male volunteers after an oral dose of 200mg TP tablets.
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Affiliation(s)
- Jianfang Liu
- Department of Clinical Pharmacology, Bethune International Peace Hospital, 398 West Zhongshan Road, Shijiazhuang 050082, China
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Hou Y, Belcheva MM, Clark AL, Zahm DS, Coscia CJ. Increased opioid receptor binding and G protein coupling in the accumbens and ventral tegmental area of postnatal day 2 rats. Neurosci Lett 2006; 395:244-8. [PMID: 16300888 PMCID: PMC1819395 DOI: 10.1016/j.neulet.2005.10.086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 09/16/2005] [Revised: 10/27/2005] [Accepted: 10/31/2005] [Indexed: 10/25/2022]
Abstract
In some regions of the developing rat brain such as the nucleus accumbens (Acb), mu opioid (MOP) receptor specific binding in the perinatal period exceeds that in the adult. To investigate the significance of these developmental changes, MOP and nociceptin/orphanin FQ (NOP) receptor binding and G protein coupling as determined by GTPgammaS binding experiments were examined in mesolimbic regions of postnatal day 2 (P2) pups and compared to those of their dams. Acb of the P2 pup exhibited 2-fold greater MOP receptor specific binding than that of the dam. In the ventral tegmental area (VTA), NOP specific binding was about 2-fold higher in the P2 pup. A correlation was found between MOP and NOP binding and their coupling to G protein on dam and P2 pup brain sections. However, the magnitude of increases in MOP and NOP receptor G protein coupling to G protein in P2 pups exceeded the 2-fold differences in binding between pups and dams. Furthermore, the amplitude of the MOP receptor G protein coupling in female P2 Acb was greater than increases in male P2 pup Acb. Differences in MOP and NOP binding and G protein coupling in other mesolimbic regions between P2 pups and dams were rarely observed. The data indicate that greater binding and G protein coupling of MOP and NOP receptors occur in discrete, mesolimbic regions of P2 pups when compared to their dams. It may be of significance that these brain regions, Acb and VTA, are undergoing maturation on P2.
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Affiliation(s)
- Yanning Hou
- Department of Biochemistry & Molecular Biology, St. Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Mariana M. Belcheva
- Department of Biochemistry & Molecular Biology, St. Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Amy L. Clark
- Department of Biochemistry & Molecular Biology, St. Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Daniel S. Zahm
- Department of Pharmacological & Physiological Sciences, St. Louis University School of Medicine, St. Louis, MO 63104, USA
| | - Carmine J. Coscia
- Department of Biochemistry & Molecular Biology, St. Louis University School of Medicine, St. Louis, MO 63104, USA
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Wang N, Wu HH, Hou YN. [Effects of morphine dependence on the levels of neurosteroids in rat brain]. Yao Xue Xue Bao 2005; 40:1037-40. [PMID: 16499091] [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: 05/06/2023]
Abstract
AIM To establish the rat model of morphine-induced conditioned place preference (CPP) and to investigate the effects of morphine psychical dependence on the levels of neurosteroids in rat brain. METHODS Rats were ip administered morphine 5 mg x kg(-1) for 10 days to induce CPP in morphine group. The concentrations of dehydroepiandrosterone (DHEA), pregnenolone (PREG), allopregnanolone (AP), dehydroepiandrosterone sulfate (DS) and pregnenolone sulfate (PS) in nucleus accumbens (Nac), hypothalamus (Ht), amygdale (A) and plasma of rats were determined with liquid chromatography-negative atmospheric pressure ionization mass spectrometry (LC-MS). RESULTS Trained with morphine for 10 days resulted in the acquisition of CPP in morphine group with the time that the rats spent in drug-pairing room was longer than that of control group. Compared with control group, morphine treatment could significantly decrease the contents of DHEA in Nac and plasma, decrease that of PREG in Ht. CONCLUSION Morphine could induce the CPP in rats and affected the contents of some neurosteroids in rat brain, which suggests that endogenous neurosteroids might he related to the development of morphine dependence.
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Affiliation(s)
- Na Wang
- Bethune International Peace Hospital, Shijiazhuang 050082, China
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Ren JM, Hou YN. [Determination of unconjugated neurosteroids in rat brain regions by liquid chromatography-negative atmospheric pressure ionization mass spectrometry]. Yao Xue Xue Bao 2005; 40:262-6. [PMID: 15952601] [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: 05/02/2023]
Abstract
AIM To simultaneously determine three unconjugated neurosteroids, dehydroepiandrosterone (DHEA) , pregnenolone (PREG), allopregnenolone (AP), from several brain regions of the rat. METHODS Neurosteroids were isolated separately in a two steps procedure by using ethyl acetate-n-hexane (90:10) as the first step to extract the unconjugated steroids, then the steroid fractions were further purified by SPE. All steroids were derivatized with 2-nitro-4-trifluoromethylphenylhydrazine (2-NFPH) and analyzed by HPLC-MS ( APCI) using selected-ion monitoring. Methyltestosterone was chosen as the internal standard. Results The linear calibration curve of DHEA was obtained in the concentration range of 0.030-2.00 microg x L(-1). The linear calibration curves of PREG and AP were obtained in the concentration range of 0.025-2.00 microg x L(-1). The concentrations of DHEA, PREG and AP in male rat brain regions were (0.70 +/- 0.23), (4.8 +/- 1.9), (1.1 +/- 0.6) ng x g(-1) for frontal cortex, (0.57 +/- 0.28), (6 +/- 3), (0.5 +/- 0.3) ng x g(-1) for hippocampus, (1.5 +/- 1.0), (9 +/- 5), (1.4 +/- 0.9) ng x g(-1) for amygdale, (0.52 +/- 0.14), (7.7 +/- 2.8), (0.5 +/- 0.6) ng x g(-1) for striatum, (2.9 +/- 1.6), (18 +/- 9), (1.6 +/- 1.3) ng x g(-1) for nucleus accumbens, (4.0 +/- 2.0), (27 +/- 12), (0.8 +/- 0.5) ng x g(-1) for pituitary gland, (1.7 +/- 1.2), ( 16 +/- 10), and (0. 8 +/- 0.7) ng x g(-1) for hypothalamus, respectively. CONCLUSION Good linearity and accuracy were observed for each steroid. The procedure was suitable for measuring concentrations of the unconjugated steroids in rat brain simultaneously.
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Affiliation(s)
- Jin-min Ren
- Bathune International Peace Hospital, Shijiazhuang 050082, China
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Jiang P, Hou YN, Yan CZ. [Preparation, identification and application of anti-P450scc antibody]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2005; 21:198-201. [PMID: 15766405] [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: 05/02/2023]
Abstract
AIM To prepare rabbit anti-rat P450scc antibody, and to detect the expression of rP450scc in rat brain tissue and nerve cells. METHODS An eight-branched polypeptide, rP450scc-16 was synthesized using solid phase synthesis (Fmoc) method. A Newzealand rabbit was immunized with rP450scc-16 and the serum was separated from the whole blood 5 days after the last immunization. The titer and specificity of the antiserum were evaluated, and the expression of rP450scc in normal rat brain and primary rat astrocytes was detected by using ELISA, Western blot and immunocytochemcal staining. RESULTS The titer of the antiserum was 1:6,400. Western blot analysis showed that the rP450scc protein in rat brain, testis and adrenal gland homogenate was recognized by the antiserum as a single band at M(r) being 50,000, which indicated a high specificity of the antiserum. Hypothalamus, cerebral cortex, and hippocampus of rat brain and the cytoplasm of cultured rat astrocytes were positively stained by the antiserum. CONCLUSION A highly specific anti-rP450scc antibody was prepared. The antibody can be used to study the expression and distribution of rP450scc in rat brain.
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Affiliation(s)
- Ping Jiang
- Department of Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China.
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Ren J, Hou Y. [Determination of neurosteroids in rat brain regions by liquid chromatography/negative atomspheric pressure ionization mass spectrometry]. Se Pu 2004; 22:575-8. [PMID: 15807105] [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: 05/02/2023] Open
Abstract
A simplified method has been established using liquid chromatography-negative atomspheric pressure ionization mass spectrometry (LC-MS) to simultaneously determine two conjugated neurosteroids from rat brain regions. Neurosteroids were separately isolated in a two-step procedure using chloroform/2-butanol (50: 50, v/v) where the first step was to extract sulfated steroids, then steroid fractions were purified by solid phase extraction (SPE), and finally the sulfated steroid was solvolyzed. Estrogen sulfate was chosen as internal standard. All steroids were derivatized with 2-nitro-4-trifluoromethylphenylhydrazine (2NFPH) and analyzed by LC-MS using selected-ion monitoring. LC-MS was performed on an Agilent 1100 liquid chromatograph-mass spectrometer with atmospheric pressure chemical ionization (APCI) interface, and the hydrazones of oxosteroids was analyzed in a negative-ion mode. A Zorbax SB C18 column was used with a flow rate of 1 mL/min at 40 degrees C. The mobile phase consisted of acetonitrile and distilled water. The concentrations of PREGS and DHEAS in male rat brain regions were (4.14 +/- 1.33 ) ng/g and (2.26 +/- 0.76) ng/g (pituitary gland), (1.98 +/- 1.13) ng/g and (1.80 +/- 0.93) ng/g (hypothalamus), (1.08 +/- 0.48 ) ng/g and (0.81 +/- 0.23) ng/g (frontal cortex), (0.72 +/- 0.19) ng/g and (0.77 +/- 0.12) ng/g (hippocampus), (1.70 +/- 0.45) ng/g and (1.44 +/- 0.71 ) ng/g (amygdale), (0.92 +/- 0.27) ng/g and (0.85 +/- 0.44) ng/g (striatum), (3.62 +/- 1.77) ng/g and (3.17 +/- 2.11) ng/g (nucleus accumbens), respectively. Good linearity and accuracy were observed for each steroid. The procedure was suitable for measuring concentrations of the sulfated steroids in rat brain regions simultaneously.
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Affiliation(s)
- Jinmin Ren
- Bathune International Peace Hospital, Shijiazhuang 050082, China
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Hou Y, Tan Y, Belcheva MM, Clark AL, Zahm DS, Coscia CJ. Differential effects of gestational buprenorphine, naloxone, and methadone on mesolimbic mu opioid and ORL1 receptor G protein coupling. Brain Res Dev Brain Res 2004; 151:149-57. [PMID: 15246701 DOI: 10.1016/j.devbrainres.2004.05.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/03/2004] [Indexed: 11/20/2022]
Abstract
In addition to its use for heroin addiction pharmacotherapy in general, buprenorphine has advantages in treating maternal heroin abuse. To examine the gestational effects of buprenorphine on opioid receptor signaling, the [(35)S]-GTP gamma S in situ binding induced by the mu agonist [D-Ala(2),MePhe(4),Gly(5)-ol] enkephalin (DAMGO) or the nociceptin/orphanin FQ (N/OFQ) agonist was measured in mesolimbic structures of pup brains from pregnant rats administered with buprenorphine +/- naloxone, naloxone, or methadone by osmotic minipump. Drug- and gender-based changes in DAMGO- and N/OFQ-induced GTP gamma S binding were discovered in mesolimbic regions of dam, P2, and P7 brains. Buprenorphine and/or methadone gestational treatment attenuated DAMGO-induced GTP gamma S binding in some dam and male P2 mesolimbic regions. Methadone diminished DAMGO-induced GTP gamma S binding in almost all monitored brain regions of the dam but had few effects on their N/OFQ-induced GTP gamma S binding. Naloxone used in combination with buprenorphine blocked the inhibition by buprenorphine alone on DAMGO-induced GTP gamma S binding. In contrast to its inhibitory effects on DAMGO-induced GTP gamma S binding, buprenorphine stimulated N/OFQ-induced GTP gamma S binding in male P2 nucleus accumbens and lateral septum. Brain region-dependent gender differences in DAMGO-induced GTP gamma S binding were seen in P2 pups, and males showed greater sensitivity to buprenorphine and methadone than females. Our findings on mu opioid receptor (MOR) GTP-binding regulatory protein (G protein) coupling and its gender dependency are consistent with our earlier studies on mu receptor binding adaptation induced by buprenorphine in dams and neonatal rats after in utero treatment regimens, and they extend the gestational effects of this opiate to mu and N/OFQ receptor functionality.
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Affiliation(s)
- Yanning Hou
- Department of Biochemistry and Molecular Biology, St. Louis University School of Medicine, 1402 S. Grand Boulevard, St. Louis, MO 63104, USA
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27
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Yan C, Hou Y. [Determination of neurosteroids in rat brain by gas chromatography/mass spectrometry]. Se Pu 2004; 22:12-5. [PMID: 15712935] [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: 05/01/2023] Open
Abstract
A simplified method has been established to simultaneously characterize different neurosteroids in rat brain by gas chromatography/mass spectrometry (GC-MS). Neurosteroids were isolated separately in a two-step procedure using ethyl acetate in the first step to extract the unconjugated steroids and chloroform/2-butanol(50/50,v/v) in the second step to extract sulfated steroids. All steroid fractions were further purified by solid phase extraction (SPE) and the sulfated steroids were solvolyzed. All steroids were derivatized with heptafluorobutyric acid anhydride and analyzed by GC-MS (electrospray ionization) using selected ion monitoring. In male rat brain, the concentrations of pregnenolone (PREG), progesterone (PROG), allo-pregnanolone (AP) and dihydroepiandrosterone (DHEA) were (8.53 +/- 1.11) ng/g, (7.01 +/- 2.60 )ng/g, (1.17 +/- 0.19 )ng/g, and (0.92 +/- 0.20) ng/g, respectively. The concentrations of pregnenolone sulfate (PREGS) and dihydroepiandrosterone sulfate (DHEAS) were (5.94 +/- 2.03) ng/g and (1.93 +/- 0.92) ng/g, respectively. Good linearity and accuracy were observed for each steroid. The procedure was suitable for measuring the concentrations of endogenous neurosteroids, simultaneously including the sulfates in rat brain.
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Affiliation(s)
- Caizhen Yan
- Department of Clinical Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China.
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Liu HC, Yu Y, Wang N, Hou YN, Wang YL. [Stereoselectivity in biliary excretion of trans tramadol and trans O-demethyltramadol in rats]. Yao Xue Xue Bao 2003; 38:412-5. [PMID: 14513798] [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: 04/27/2023]
Abstract
AIM To investigate the stereoselectivity in biliary excretion of trans tramadol (trans T) and trans O-demethyltramadol (M1) in rats. METHODS After a single intravenous dose of trans T hydrochloride (10 mg.kg-1) or M1 (2.5 mg.kg-1) to rats, the bile was collected for 30 min, then, blood was obtained from the heart. The enantiomers of trans T, M1 and M1 conjugated with glucuronic acid (M1c) in the bile and plasma were analyzed by high performance capillary electrophoresis (HPCE). RESULTS After the rats were given trans T, the bile concentrations of (+)-trans T were higher than those of (-)-trans T, and the (+)/(-)-trans T ratios were lower compared with those in the plasma. After the rats were given M1, the bile concentrations of (+)-M1 were higher than those of (-)-M1, and the bile concentrations of (+)-M1c were lower than those of (-)-M1c. The glucuronidation rate of (+)-M1 was lower than that of (-)-M1 in the bile. CONCLUSION The biliary excretion of trans T and M1 was stereoselective, (+)-trans T and (-)-M1 being preferentially excreted.
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Affiliation(s)
- Hui-chen Liu
- Department of Pharmacology, Hebei Medical University, Department of Clinical Pharmacology, Bethune International Peace Hospital, Shijiazhuang, China
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Wang N, Liu HC, Liu CS, Hou YN. [Stereoselectivity in O-demethylation of trans tramadol in rat liver microsomes in vitro]. Yao Xue Xue Bao 2002; 37:169-74. [PMID: 12579754] [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: 02/28/2023]
Abstract
AIM To study the stereoselectivity in O-demethylation of trans tramadol. METHODS With or without quinine and quinidine as inhibitors, rat liver microsomes were incubated in vitro with the enantiomers or the racemate of trans tramadol. The concentrations of the enantiomers of trans tramadol and O-demethyltramadol in the incubates were determined by high performance capillary electrophoresis. The O-demethylation processes were assayed by using the enzyme kinetic analysis method. RESULTS After incubation, the concentrations of (-)-O-demethyltramadol were higher than those of (+)-enantiomer in all rat liver microsomal incubates. Enzyme kinetic analysis showed that the Km of the formation of the enantiomers of O-demethyltramadol were similar; The Vmax and Clint of the formation of (-)-O-demethyltramadol were significantly higher than those of the formation of (+)-enantiomer. When the racemate of trans tramadol was used as the substrate, there was interaction between the two enantiomers. The Km of the formation of the enantiomers of O-demethyltramadol increased, the Vmax of the formation of (+)-O-demethyltramadol decreased, the Vmax of the formation of (-)-O-demethyltramadol increased slightly. The O-demethylation of the enantiomers of trans tramadol was shown to be inhibited competitively by quinine and quinidine. The Ki of quinine and quinidine were 1.6 and 10.8 mumol.L-1 to the formation of (-)-O-demethyltramadol, 0.8 and 3.4 mumol.L-1 to the formation of (+)-O-demethyltramadol, respectively. Furthermore, quinine and quinidine were found to have stereoselective inhibition on the formation of O-demethyltramadol, both mainly inhibited the formation of (+)-O-demethyltramadol. CONCLUSION The O-demethylation of trans tramadol was found to be stereoselective in rat liver microsomes in vitro, preferentially metabolized (-)-enantiomer. The stereoselectivity could be influenced by the interaction between the two enantiomers and the enzyme selective inhibitors.
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Affiliation(s)
- Na Wang
- Department of Clinical Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China
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Liu HC, Wang N, Liu CS, Hu YQ, Liu JF, Hou YN. Distribution of enantiomers of trans-tramadol and trans-O-demethyltramadol in central nervous system of rats. Acta Pharmacol Sin 2001; 22:871-5. [PMID: 11749767] [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: 02/23/2023] Open
Abstract
AIM To investigate the distribution of the enantiomers of trans-tramadol (trans-T) and its active metabolite, trans-O-demethyltramadol (M1), in the central nervous system (CNS). METHODS After a single ip dose of trans-T hydrochloride or M1, the rats were killed by decapitation. A high performance capillary electrophoresis (HPCE) method was used to determine the concentrations of enantiomers of trans-T and M1 in the serum and different brain tissues, including cerebrospinal fluid (CF), cerebral cortex (CC), corpus striatum (CS), hypothalamus (HY), cerebellum (CE), and medulla oblongata (MO). RESULTS After ip trans-T hydrochloride, the concentrations of (+)-trans-T were higher than those of (-)-trans-T in the serum and all tested brain tissues; The concentrations of (+)-M1 were lower than those of (-)-M1 in the all tested brain tissues; The concentrations of the enantiomers of trans-T and M1 were the highest in the CC, the lowest in the CF. After ip M1, the concentrations of (+)-M1 were higher than those of (-)-M1 in the serum and all tested brain tissues; The concentrations of the enantiomers of M1 were the highest in the CC, the lowest in the CF. CONCLUSION The concentrations of the enantiomers of trans-T and M1 varied in the serum and different brain tissues. The distribution of trans-T and M1 in the CNS of rats was stereoselective. The stereoselectivity in the distribution of M1 after M1 injection was different with that after trans-T injection.
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Affiliation(s)
- H C Liu
- Department of Clinical Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China.
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Liu HC, Hu YQ, Liu JF, Wang N, Hou YN. [Transportation of the enantiomers of trans tramadol and O-demethyltramadol across blood-brain barrier]. Yao Xue Xue Bao 2001; 36:644-7. [PMID: 12580098] [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: 02/28/2023]
Abstract
AIM To investigate the transportation of the enantiomers of trans tramadol (trans T) and its active metabolite, O-demethyltramadol (M1) across blood-brain barrier. METHODS Rats were sacrificed by femoral artery bleeding 1 h after i.p. administration of trans T hydrochloride, 16.7 mg.kg-1 or 50.0 mg.kg-1. Blood, cerebrospinal fluid and cerebral cortex were taken out. The enantiomers of trans T and M1 were analyzed by high performance capillary electrophoresis (HPCE). RESULTS Among the three tissues, the concentration of each enantiomer of trans T and M1 was the highest in the cerebral cortex, and the lowest in the cerebrospinal fluid. In the serum, the concentration of (+)-trans T was higher than that of (-)-trans T, and the concentrations of the enantiomers of M1 were similar. In the cerebrospinal fluid and cerebral cortex, the concentration of (+)-trans T was higher than that of (-)-trans T, and the concentrations of (+)-M1 was lower than that of (-)-M1. CONCLUSION The transportation across blood-brain barrier of the enantiomers of trans T and M1 was stereoselective. In the brain tissues, the concentrations of (+)-trans T and (-)-M1 were higher than those of their enantiomers.
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Affiliation(s)
- H C Liu
- Department of Clinical Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China.
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Hou YN, Zhu XY, Liang XL, Cheng GF. [Effect of stilbene polymer (Gn-3) on experimental liver injuries in mice]. Yao Xue Xue Bao 2001; 36:81-3. [PMID: 12579868] [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: 02/28/2023]
Abstract
AIM To study the protective effect of Gn-3 (a stilbene polymer isolated from Gnetum parvifolium) against liver injury induced by CCl4, N-acetyl-p-aminophenol (APAP) and Bacillus Calmette-Guerin (BCG) plus bacterial lipopolysaccharide (LPS) in mice. METHODS The experimental model of liver injury were induced by 0.1% CCl4 i.p. (10 mL.kg-1.d-1 for 3d), APAP i.p. (150 mg.kg-1) or BCG (5 mg) plus LPS (7.5 micrograms) in mice. The levels of ALT in serum, MDA and GSH in liver tissues were detected. The histopathologic changes were observed by light microscope. RESULTS Gn-3 was shown to markedly reduce the elevated serum ALT levels, liver tissue MDA and improve the histopathological changes in all the three experimental liver injury models. No effect of Gn-3 was observed on the liver GSH level in liver injury mice. CONCLUSION Gn-3 was found to inhibit the development of liver injury caused by CCl4, APAP, or BCG plus LPS. This means that Gn-3 has liver protective effects.
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Affiliation(s)
- Y N Hou
- Institute of Materia Medica, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100050, China
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Liu HC, Liu TJ, Yang YY, Hou YN. Pharmacokinetics of enantiomers of trans-tramadol and its active metabolite, trans-O-demethyltramadol, in human subjects. Acta Pharmacol Sin 2001; 22:91-6. [PMID: 11730570] [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
AIM To study the stereoselectivity in pharmacokinetics of the enantiomers of trans-tramadol (trans-T) and its active metabolite, trans-O-demethyltramadol (M1) in human subjects. METHODS Trans-T hydrochloride sustained-release tablets were taken orally by 12 healthy male volunteers. After a multiple dosage schedule, the serum concentrations of (+)-trans-T, (-)-trans-T, (+)-M1, and (-)-M1 were determined in serum by high performance capillary electrophoresis (HPCE). RESULTS (+)-Trans-T, (-)-trans-T, (+)-M1 and (-)-M1 in human serum were separated by HPCE. The linear range was 2.5-320 microg/L for the enantiomers of trans-T, and 2.5-50 microg/L for the enantiomers of M1. For the enantiomers of trans-T and M1, the intra-day and inter-day RSD were less than 15 % and 20 %, and the relative recoveries were 94.3 %-106.2 % and 90.4 %-107.8 %, respectively; the limit of quantitation was 1.25 microg/L. The serum concentrations of the enantiomers of trans-T reached a steady state in 12 subjects on d 4 after the initial administration. The steady state serum concentrations of (+)-trans-T were higher than that of (-)-trans-T at every sampling points in the subjects. The differences were significant in the main pharmacokinetic parameters between (+)-trans-T and (-)-trans-T except Tmax. The serum concentrations of (-)-M1 were higher than that of (+)-M1 in most subjects and at most sampling time points. There were significant differences in Cmax and Cmin between the enantiomers of M1. CONCLUSION The pharmacokinetics of trans-T and M1 was found to be stereoselective. (+)-Trans-T was shown to be absorbed completely, but eliminated more slowly. The pharmacokinetic stereoselectivity of M1 was different among human subjects.
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Affiliation(s)
- H C Liu
- Department of Clinical Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China.
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Hou YN, Zhu XY, Cheng GF. [Effects of baicalin on liver microsomal cytochrome P450 system]. Yao Xue Xue Bao 2000; 35:890-2. [PMID: 12567908] [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: 02/28/2023]
Abstract
AIM To investigate the effect of baicalin on liver microsomal cytochrome P450 system and the mechanism of liver protective action of baicalin. METHODS Liver microsomal cytochrome P450, b5, aminopyrin N-demethylase (ADM), 7-ethoxycoumarin O-deethylase (ECD) and benzopyrene hydroxylase (AHH) activity were quantitated by UV chromatography. Activities of six cytochrome P450 isoforms were assayed with Western Blotting. RESULTS Baicalin increased liver microsomal cytochrome. P450 level and ADM, ECD and AHH activity significantly. The three P450 isoforms, 1A1, 2B1 and 2C11, were also induced selectively by baicalin, but the b5 level, 3A2, 2D1 and 2E1 were not induced. CONCLUSION Baicalin increases liver microsomal cytochrome P450 level and induces selectively 1A1, 2B1 and 2C11 of P450 isoforms in mice.
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Affiliation(s)
- Y N Hou
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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Hu YQ, Liu HC, Ma R, Wang J, Hou YN. [Determination of acemetacin and indometacin in human serum by high performance liquid chromatography]. Se Pu 1999; 17:586-7. [PMID: 12552700] [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: 02/28/2023] Open
Abstract
A method of HPLC for the quantitative determination of acemetacin and indometacin in human serum is described. After being extracted with diethyl ether, acemetacin and indometacin were analyzed by reversed-phase HPLC(Spherisorb-C8) and UV-detector(254 nm), with tolbutamide as internal standard. The mobile phase was a mixture of V(acetate buffer solution, pH 4.6):V(methyl alcohol):V(acetonitrile) = 55:5:40 and at a rate of 1.0 mL/min. Over the mass concentration range of 12.5 micrograms/L-1.6 mg/L, both the calibration curves were linear, r = 0.9996, n = 8. The average recoveries of acemetacin and indometacin were 77.2% and 86.7% respectively. The within-day and between-day RSD of acemetacin and indometacin were less than 5% and 10% respectively.
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Affiliation(s)
- Y Q Hu
- Department of Pharmacology, Bethune International Peace Hospital, Shijiazhuang 050082, China
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Hu WY, Li YW, Hou YN, He K, Chen JF, But PP, Zhu XY. The induction of liver microsomal cytochrome P450 by Glycyrrhiza uralensis and glycyrrhetinic acid in mice. Biomed Environ Sci 1999; 12:10-14. [PMID: 10442216] [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: 05/23/2023]
Abstract
The effect of Glycyrrhiza uralensis Fisch (GRZ) aqueous extract and one of its active principles Glycyrrhetinic acid (GRT) on hepatic cytochrome P450 in mice were investigated. Oral administration of GRZ at 10 g/kg/d or GRT at 50 mg/kg/d for 7 days was found to increase the P450 contents up to 4.6 fold compared with the controls. The activities of aryl hydrocarbon hydroxylase (AHH, 3.1 and 3.3 fold), aminopyrine N-demethylase (ADM, 4.2 and 3.2 folds), and 7-ethoxycumarin O-deethylase (ECOD, 2.8 and 2.5 fold) were also shown to be increased. Western blot analysis showed that the subtypes of P450 isoforms induced selectively by GRZ and GRT included CYP1A1 (1.8 and 1.5 fold over that of the control, respectively), CYP2B1 (both 1.3 fold), and CYP2C11 (3.2 and 3.0 fold). Moreover, significant positive correlation between the P450 content or the isoforms and the corresponding enzyme activities mentioned above was observed.
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Affiliation(s)
- W Y Hu
- Department of Pharmacology, Chinese Academy of Medical Sciences & Beijing Union Medical College, China
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Hou YN, Cebers G, Terenius L, Liljequist S. Characterization of NMDA- and AMPA-induced enhancement of AP-1 DNA binding activity in rat cerebellar granule cells. Brain Res 1997; 754:79-87. [PMID: 9134962 DOI: 10.1016/s0006-8993(97)00049-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Effects of the glutamate receptor agonists, N-methyl-D-aspartate (NMDA) and alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA), on the activator protein-1 (AP-1) DNA binding activity were studied in primary cultures of rat cerebellar granule cells. Application of NMDA as well as of AMPA produced a concentration-dependent enhancement of AP-1 binding. Further examination revealed that only a brief exposure (10 min) to NMDA or AMPA was required for the initiation of a significant, four- to sixfold enhancement of AP-1 DNA binding activity. Blockade of the desensitization of AMPA receptors by cyclothiazide further reduced the exposure time needed to activate the AP-1 complex. The time needed to achieve a maximal increase of AP-1 binding activity varied depending on the glutamate receptor agonist used. NMDA gave maximal AP-1 stimulation after 60 min exposure, whereas stimulation with AMPA alone reached a maximum after 240 min exposure. When AMPA was applied together with cyclothiazide the maximal enhancement of AP-1 binding was reached much faster, within 120 min. Supershift analysis with specific antibodies against the members of Fos and Jun protein families (c-Fos, Fos B, c-Jun, Jun B, Jun D) revealed that the NMDA-induced AP-1 complex was composed predominantly of Jun D and c-Fos. The composition of the AP-1 complex activated by AMPA alone was similar to that produced by NMDA, but with an additional contribution of Fos B. In contrast, application of AMPA plus cyclothiazide induced an AP-1 transcription with contribution of Jun D, c-Fos, Fos B, c-Jun and Jun B proteins. These findings indicate that glutamate is able to enhance AP-1 DNA binding activity in cerebellar granule cells through both NMDA and AMPA glutamate receptors.
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Affiliation(s)
- Y N Hou
- Bethune International Peace Hospital, Shijiazhuang, China
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Abstract
We examined the effects of chronic ethanol exposure (50 mM; 3 days) on N-methyl-D-aspartate (NMDA)- and alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA)-induced AP-1 transcription factor DNA binding activity in primary cultures of rat cerebellar granule cells. Chronic ethanol exposure enhanced NMDA-stimulated AP-1 binding activity, with no corresponding change in AMPA-stimulated AP-1 binding. Supershift analysis with specific antibodies against the members of Fos and Jun protein families showed that the NMDA-induced AP-1 protein complex consisted predominantly of c-Fos and Jun D proteins. Chronic ethanol treatment by itself did not change the protein composition of the AP-1 complex.
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Affiliation(s)
- G Cebers
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
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Hou YN, Cebers G, Cebere A, Terenius L, Liljequist S. N-Methyl-D-aspartate-induced enhancement of activator protein-1 DNA binding activity is blocked by ethanol in cerebellar granule cells. Eur J Pharmacol 1996; 309:307-10. [PMID: 8874155 DOI: 10.1016/0014-2999(96)00438-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The effects of ethanol on N-methyl-D-aspartate (NMDA) and non-NMDA receptor agonist-stimulated activator protein-1 (AP-1) DNA binding activity in primary cultures of rat cerebellar granule cells were investigated. The application of intoxicating concentrations of ethanol produced a concentration-dependent inhibition of NMDA-enhanced AP-1 binding with a significant reduction obtained at 50 mM ethanol. The inhibitory actions of ethanol on alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA)-stimulated AP-1 binding were considerably weaker as compared to the effects seen following administration of NMDA. The AMPA-induced enhancement of AP-1 DNA binding activity was demonstrated both in the absence and presence of cyclothiazide, a drug, which is known to block the desensitization of AMPA receptors. Our data suggest that moderate concentrations of ethanol modulate glutamate-induced alterations of gene expression in brain neurons.
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Affiliation(s)
- Y N Hou
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
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Hou YN, Vlaskovska M, Cebers G, Kasakov L, Liljequist S, Terenius L. A mu-receptor opioid agonist induces AP-1 and NF-kappa B transcription factor activity in primary cultures of rat cortical neurons. Neurosci Lett 1996; 212:159-62. [PMID: 8843097 DOI: 10.1016/0304-3940(96)12799-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Activator protein 1 (AP-1) and nuclear factor kappa B (NF-kappa B) represent mammalian transcription factors which bind to distinct enhancer motifs. The specific mu-receptor opioid agonist, Tyr, D-Ala2, Gly, N-Me-Phe4, Gly-ol5 (DAMGO), was found to increase AP-1 and NF-kappa B activity in primary cultures of neurons from rat cerebral cortex. Acute (2 h, 4 h) and long-term (72 h) treatment with DAMGO time-dependently increased the DNA-binding activity of both AP-1 and NF-kappa B and the stimulation could be abolished or inhibited by concurrent incubation with naloxone. However, acute naloxone-precipitated withdrawal did not significantly change AP-1 or NF-kappa B activity. These results indicate a mu-opioid receptor-related co-induction of AP-1 and NF-kappa B transcription factors in cultured cortical neurons.
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Affiliation(s)
- Y N Hou
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
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Hou YN, Tang RY, Yao DF. [Effects of neutrophils emigration on vascular permeability and anti-inflammatory mechanism of dexamethasone]. Zhongguo Yao Li Xue Bao 1988; 9:258-61. [PMID: 3213544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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