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Huo T, Ruan JJ, Jiang MJ, Lei F, Huang W, Tang WQ, Xie WG, Xu XY, Wang S, Liu SH. [Prospective study on the effects of resistance training with elastic band at home on muscle function and walking ability of severely burned children]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:1131-1139. [PMID: 38129299 DOI: 10.3760/cma.j.cn501225-20230729-00022] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Objective: To explore the effects of resistance training with elastic band at home on muscle function and walking ability of severely burned children. Methods: A prospective non-randomized controlled study was conducted. From January 2022 to April 2023, 40 children with severe burns who met the inclusion criteria were admitted to Tongren Hospital of Wuhan University & Wuhan Third Hospital. According to the willingness of the children or their families, the children were assigned to conventional rehabilitation group and combined rehabilitation group. During the study, 8 children dropped out of the study, 17 children were finally included in the conventional rehabilitation group with 6 males and 11 females, aged (8.5±2.4) years, and 15 children were included in the combined rehabilitation group with 5 males and 10 females, aged (9.6±2.5) years. The children in the 2 groups received conventional burn rehabilitation treatment in the hospital, including active and passive activity training, scar massage, and pressure therapy. The children in combined rehabilitation group received resistance training with elastic band of 3 to 5 times per week after discharge, and the children in conventional rehabilitation group received daily activity ability training after discharge. Before home rehabilitation training (1 week before discharge) and 12 weeks after home rehabilitation training, the grip strength was measured using a handheld grip dynamometer, the muscle strengths of the upper and lower limbs were measured using a portable dynamometer for muscle strength, lean body mass was measured by bioelectrical impedance measuring instrument, and the 6-min walking distance was measured. Data were statistically analyzed with independent sample t test, paired sample t test, Mann-Whitney U test, or Fisher's exact probability test. Results: After 12 weeks of home rehabilitation training, the grip strengths of children in combined rehabilitation group and conventional rehabilitation group were (15±4) and (11±4) kg, respectively, which were significantly higher than (10±4) and (9±4) kg before home rehabilitation training (with t values of -9.99 and -11.89, respectively, P values all <0.05); the grip strength of children in combined rehabilitation group was significantly higher than that in conventional rehabilitation group (t=3.24, P<0.05). After 12 weeks of home rehabilitation training, the muscle strengths of upper and lower limbs of children in combined rehabilitation group (with t values of -11.39 and -3.40, respectively, P<0.05) and the muscle strengths of upper and lower limbs of children in conventional rehabilitation group (with t values of -7.59 and -6.69, respectively, P<0.05) were significantly higher than those before home rehabilitation training, and the muscle strengths of upper and lower limbs of children in combined rehabilitation group were significantly higher than those in conventional rehabilitation group (with t values of 3.80 and 7.87, respectively, P<0.05). After 12 weeks of home rehabilitation training, the lean body mass of children in combined rehabilitation group was significantly higher than that before home rehabilitation training (t=0.21, P<0.05). After 12 weeks of home rehabilitation training, the 6-min walking distances of children in conventional rehabilitation group and combined rehabilitation group were significantly longer than those before home rehabilitation training (with t values of -5.33 and -3.40, respectively, P<0.05), and the 6-min walking distance of children in combined rehabilitation group was significantly longer than that in conventional rehabilitation group (t=3.81, P<0.05). Conclusions: Conventional burn rehabilitation treatment in hospital and home resistance training with elastic band for 12 weeks after discharge can significantly improve the muscle function and walking ability of severely burned children.
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Affiliation(s)
- T Huo
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
| | - J J Ruan
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
| | - M J Jiang
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
| | - F Lei
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
| | - W Huang
- Department of Radiology, Liyuan Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430077, China
| | - W Q Tang
- College of Sports Medicine, Wuhan Sports University, Wuhan 430079, China
| | - W G Xie
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
| | - X Y Xu
- Department of Radiology, Liyuan Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430077, China
| | - S Wang
- College of Sports Medicine, Wuhan Sports University, Wuhan 430079, China
| | - S H Liu
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
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Liu Y, Li G, Lu F, Guo Z, Cai S, Huo T. Excess iron intake induced liver injury: The role of gut-liver axis and therapeutic potential. Biomed Pharmacother 2023; 168:115728. [PMID: 37864900 DOI: 10.1016/j.biopha.2023.115728] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 10/23/2023] Open
Abstract
Excessive iron intake is detrimental to human health, especially to the liver, which is the main organ for iron storage. Excessive iron intake can lead to liver injury. The gut-liver axis (GLA) refers to the bidirectional relationship between the gut and its microbiota and the liver, which is a combination of signals generated by dietary, genetic and environmental factors. Excessive iron intake disrupts the GLA at multiple interconnected levels, including the gut microbiota, gut barrier function, and the liver's innate immune system. Excessive iron intake induces gut microbiota dysbiosis, destroys gut barriers, promotes liver exposure to gut microbiota and its derived metabolites, and increases the pro-inflammatory environment of the liver. There is increasing evidence that excess iron intake alters the levels of gut microbiota-derived metabolites such as secondary bile acids (BAs), short-chain fatty acids, indoles, and trimethylamine N-oxide, which play an important role in maintaining homeostasis of the GLA. In addition to iron chelators, antioxidants, and anti-inflammatory agents currently used in iron overload therapy, gut barrier intervention may be a potential target for iron overload therapy. In this paper, we review the relationship between excess iron intake and chronic liver diseases, the regulation of iron homeostasis by the GLA, and focus on the effects of excess iron intake on the GLA. It has been suggested that probiotics, fecal microbiota transfer, farnesoid X receptor agonists, and microRNA may be potential therapeutic targets for iron overload-induced liver injury by protecting gut barrier function.
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Affiliation(s)
- Yu Liu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning 110122, China
| | - Guangyan Li
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning 110122, China
| | - Fayu Lu
- School of Public Health, China Medical University, Shenyang, Liaoning 110122, China
| | - Ziwei Guo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning 110122, China
| | - Shuang Cai
- The First Affiliated Hospital of China Medical University, Shenyang 110001, China.
| | - Taoguang Huo
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning 110122, China; Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning 110122, China.
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Huo T, Xu XY, Xie WG, Liu SH. [Research advances on the application of rehabilitation exercise training in pediatric burn rehabilitation]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:275-279. [PMID: 37805725 DOI: 10.3760/cma.j.cn501225-20220116-00008] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
The sequelae of pediatric burn seriously affect the physical function and quality of life of children with burns. Rehabilitation exercise training mainly based on aerobic and resistance exercise can effectively alleviate the negative effects. This article reviews the effects of rehabilitation exercise training on cardiopulmonary function, muscle function, and quality of life of children with burns, and introduces the latest rehabilitation exercise training prescription for children with burns based on type, mode, intensity, frequency, and time of exercise, so as to improve the level of rehabilitation treatment for children with burns.
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Affiliation(s)
- T Huo
- College of Health Science, Wuhan Sports University, Wuhan 430079, China
| | - X Y Xu
- Liyuan Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430077, China
| | - W G Xie
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
| | - S H Liu
- Department of Burns, Tongren Hospital of Wuhan University & Wuhan Third Hospital, Wuhan 430060, China
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Huo T, Zhang W, Yang J, Li J, Zhang Y, Guo H, Wu X, Li A, Feng C, Jiang H. Effects of chronic realgar exposure on liver lipidome in mice and identification sensitive lipid biomarker model for realgar-induced liver damage. Toxicol Lett 2023; 372:1-13. [DOI: 10.1016/j.toxlet.2022.10.002] [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] [Received: 04/13/2022] [Revised: 08/19/2022] [Accepted: 10/11/2022] [Indexed: 11/18/2022]
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Feng C, Li A, Yin C, Wang S, Jin W, Liu Y, Huo T, Jiang H. Realgar Alleviated Neuroinflammation Induced by High Protein and High Calorie Diet in Rats via the Microbiota-Gut-Brain Axis. Nutrients 2022; 14:nu14193958. [PMID: 36235611 PMCID: PMC9572528 DOI: 10.3390/nu14193958] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/17/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Purpose: Gastrointestinal heat retention syndrome (GHRS) often occurs in adolescents, resulting into nervous system injury. Realgar, an arsenic mineral with neuroprotective effect, has been widely used to treat GHRS. However, its mechanism of action remains unknown. Methods: A GHRS rat model was established using a high protein and high calorie diet. We performed macroscopic characterization by assessing bowel sounds, hot/cold preference, anal temperature, and fecal features. Atomic fluorescence spectroscopy was employed to evaluate brain arsenic level while hippocampal ultrastructural changes were analyzed using transmission electron microscopy. In addition, inflammatory cytokines and BBB breakdown were analyzed by western blotting, immunofluorescence assays, and immunohistochemistry staining. We also evaluated hippocampal metabolites by LC-MS while fecal microorganisms were assessed by 16S rDNA sequencing. Results: Our data showed that the high protein and high calorie diet induced GHRS. The rat model depicted decreased bowel sounds, increased fecal characteristics score, preference for low temperature zone, and increased anal temperature. In addition, there was increase in inflammatory factors IL-6, Iba-1, and NF-κB p65 as well as reduced BBB structural protein Claudin-5 and Occludin. The data also showed appearance of hippocampus metabolites disorder and fecal microbial imbalance. Realgar treatment conferred a neuroprotective effect by inhibiting GHRS-specific characteristics, neuroinflammatory response, BBB impairment, metabolites disorder, and microbial imbalance in the GHRS rat model. Conclusion: Taken together, our analysis demonstrated that realgar confers a neuroprotective effect in GHRS rats through modulation of the microbiota-gut-brain axis.
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Affiliation(s)
- Cong Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
- Laboratory of Research in Parkinson’s Disease and Related Disorders, Health Sciences Institute, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Aihong Li
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Chenhui Yin
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Siying Wang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Weiyuan Jin
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Yi Liu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
- The Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
- Correspondence:
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Meng Y, Yang Z, Huo T, Jiang H. Realgar facilitates the Nrf2-Keap1-p62 positive feedback signaling axis via MAPKs and AKT to interfere with autophagy-induced apoptosis and oxidative stress in the hippocampus. Biomed Pharmacother 2022; 150:112964. [PMID: 35461089 DOI: 10.1016/j.biopha.2022.112964] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 01/16/2022] [Revised: 03/30/2022] [Accepted: 04/11/2022] [Indexed: 12/15/2022] Open
Abstract
Realgar, as a commonly used traditional Chinese medicine, exerts both pharmacological and biological effects. However, the mechanism by which it causes nervous system injury remains unclear. This study aimed to elucidate the specific mechanism underlying the hippocampal neurotoxicity caused by realgar. Nrf2 is an important receptor of exogenous toxic substances and oxidative stress. We utilized a p38-specific inhibitor (SB20358), ERK1/2-specific inhibitor (PD98059), JNK-specific inhibitor (SP600125) and AKT-specific inhibitor (LY249002) to establish the corresponding animal models and explore how realgar activates Nrf2. We established an Nrf2-shRNA gene silencing model in rats and an autophagy-specific inhibitor treatment model to further explore realgar-induced neurotoxicity and the role of Nrf2 in realgar-induced damage to the hippocampus. The results showed that realgar passed through the blood-brain barrier and accumulated in brain tissue to induce central nervous system toxicity. The specific mechanism was that realgar activated MAPKs and AKT signaling molecules to activate the Nrf2-Keap1-p62 positive feedback signaling axis, induced abnormal autophagy initiation and degradation, and promoted oxidative damage and apoptosis in neurons. Effective measures should be taken to prevent and control the arsenic poisoning caused by realgar in the early stage, and this study provides a theoretical and practical basis for the rational use of drugs in the clinic.
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Affiliation(s)
- Yuan Meng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Zhao Yang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China; The Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, Shenyang, Liaoning, People's Republic of China.
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Guo H, Li X, Zhang Y, Li J, Yang J, Jiang H, Sun G, Huo T. Metabolic characteristics related to the hazardous effects of environmental arsenic on humans: A metabolomic review. Ecotoxicol Environ Saf 2022; 236:113459. [PMID: 35367889 DOI: 10.1016/j.ecoenv.2022.113459] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/18/2022] [Accepted: 03/24/2022] [Indexed: 06/14/2023]
Abstract
Arsenic (As) is a toxic metalloid exist ubiquitously in environment. Epidemiological studies and laboratory animal studies have verified that As damages multiple organs or tissues in the body and is associated with a variety of diseases. Changes in metabolites usually indicate disturbances in metabolic pathways and specific metabolites are considered as biomarkers of diseases or drugs/toxins or environmental effects. Metabolomics is the quantitative measurement of the dynamic multi-parameter metabolic responses of biological systems due to pathophysiological or genetic changes. Current years, some metabolomic studies on the hazardous effect of environmental As on humans have been reported. In this paper, we first overviewed the metabolomics studies of environmental As exposure in humans since 2011, emphasizing on the data mining process of metabolic characteristics related to the hazardous effects of environmental As on humans. Then, the relationship between metabolic characteristics and the toxic mechanism of environmental As exposure in humans were discussed, and finally, the prospects of metabolomics studies on populations exposed to environmental As were put forward. Our paper may shed light on the study of mechanisms, prevention and individualized treatment of As poisoning.
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Affiliation(s)
- Haoqi Guo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Xiaohong Li
- The First Affiliated Hospital of China Medical University, Shenyang 110001, PR China
| | - Yuwei Zhang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Jian Li
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Jing Yang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China; Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Guifan Sun
- Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China; Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang 110122, PR China.
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Meng Y, Feng R, Yang Z, Liu T, Huo T, Jiang H. Oxidative stress induced by realgar in neurons: p38 MAPK and ERK1/2 perturb autophagy and induce the p62-Keap1-Nrf2 feedback loop to activate the Nrf2 signalling pathway. J Ethnopharmacol 2022; 282:114582. [PMID: 34492322 DOI: 10.1016/j.jep.2021.114582] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/13/2021] [Accepted: 08/27/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Due to the modernization of traditional Chinese medicine (TCM) and the influence of traditional medication habits (TCM has no toxicity or side effects), arsenic poisoning incidents caused by the abuse of realgar and realgar-containing Chinese patent medicines have occurred occasionally. However, the potential mechanism of central nervous system toxicity of realgar remains unclear. AIM OF THE STUDY This study aimed to clarify the specific mechanism of realgar-induced neurotoxicity. MATERIALS AND METHODS In this study, the roles of ERK1/2 and p38 MAPK in realgar-induced neuronal autophagy and overactivation of the nuclear factor erythroid-derived factor 2-related factor (Nrf2) signalling pathways was investigated in vivo and in vitro. RESULTS The arsenic in realgar passed through the blood-brain barrier and accumulated in the brain, resulting in damage to neurons, synapses and myelin sheaths in the cerebral cortex and a decrease in the total antioxidant capacity. The specific mechanism is that the excessive activation of Nrf2 is regulated by the upstream signalling molecules ERK1/2 and p38MAPK. At the same time, p38 MAPK and ERK1/2 interfere with autophagy, thereby promoting autophagy initiation but causing subsequent dysfunctional autophagic degradation and inducing the p62-Keap1-Nrf2 feedback loop to promote Nrf2 signalling pathway activation and nerve cell apoptosis. CONCLUSIONS This study confirmed the role of the signalling molecules p38 MAPK and ERK1/2 in perturbing autophagy and inducing the p62-Keap1-Nrf2 feedback loop to activate the Nrf2 signalling pathway in realgar-induced neurotoxicity.
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Affiliation(s)
- Yuan Meng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Rui Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Zhao Yang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Tingting Liu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, Liaoning, People's Republic of China; The Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, Shenyang, Liaoning, People's Republic of China.
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Li A, Wu X, Yang J, Li J, Guo H, Zhang Y, Jiang H, Huo T. Sub-chronic exposure to realgar induces liver injury via upregulating the TXNIP/NLRP3 pathway and disturbing bile acid homeostasis in mice. J Ethnopharmacol 2021; 281:114584. [PMID: 34469792 DOI: 10.1016/j.jep.2021.114584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/26/2021] [Accepted: 08/27/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Realgar is a traditional Chinese medicine used in China for a long history. Long-time or excessive use of realgar causes liver injury. However, its underlying mechanism is not fully clarified. AIM OF THE STUDY In this study, we investigated the toxic effect of sub-chronic exposure to realgar on mice liver, and further revealed its underlying mechanism focused on the TXNIP/NLRP3 pathway and bile acid homeostasis. MATERIAL AND METHODS Mice were divided into control and different doses of sub-chronic realgar exposed groups. Total arsenic levels in the blood and liver were determined by atomic fluorescence spectrometry. The effect of realgar on liver function was evaluated by biochemical analysis and histopathological examination. Assay kits were applied for the measurement of oxidative stress indexes, MPO and plasma inflammatory cytokines. The mRNA and proteins involved in the TXNIP/NLRP3 and NF-κB pathways were determined by RT-qPCR, western blot, Immunofluorescence and Immunohistochemistry. UHPLC/MS/MS was used for the quantitative analysis of bile acids (BAs) in mice plasma, liver and urine. The genes related to BAs metabolism were measured by RT-qPCR. RESULTS Sub-chronic exposure to realgar led to arsenic accumulation and caused oxidative damage and inflammatory infiltration in mouse liver, finally resulting in liver injury. Realgar treatment activated the NF-κB pathway and significantly upregulated the TXNIP/NLRP3 pathway in mouse liver. Realgar altered the metabolic balance of BAs, which is related to the abnormal expression of BAs transporters and enzymes. CONCLUSION Sub-chronic exposure to realgar caused liver injury in mouse, and the mechanism may involve the upregulation of the TXNIP/NLRP3 pathway and disordered BAs homeostasis.
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Affiliation(s)
- Aihong Li
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China
| | - Xinyu Wu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China
| | - Jing Yang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China
| | - Jian Li
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China
| | - Haoqi Guo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China
| | - Yuwei Zhang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China; Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, 110122, PR China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang, 110122, PR China; Key Laboratory of Arsenic-related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, Shenyang, 110122, PR China.
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Liu J, Feng R, Wang D, Huo T, Jiang H. Triclosan-induced glycolysis drives inflammatory activation in microglia via the Akt/mTOR/HIF 1α signaling pathway. Ecotoxicol Environ Saf 2021; 224:112664. [PMID: 34416638 DOI: 10.1016/j.ecoenv.2021.112664] [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] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/13/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
Exposure to triclosan (TCS) has been implicated in neurotoxicity including autism spectrum disorders in vivo and oxidative stress and cell apoptosis in vitro. Thus, the molecular mechanisms underlying TCS-induced neurotoxicity warrants further research. In this study, we try to address the mode of action that TCS induced the expression of inflammatory cytokines by shifting metabolism to glycolysis. BV-2 cells were treated with 20 μM TCS for 24 h, and the conditional medium from TCS-induced activated microglia reduced the viability of the murine hippocampal neurons cell line HT22. Protein expression levels in the nuclear factor kappa B (NF-κB) signaling pathway were measured through Western blotting, and the expression levels of inflammatory cytokine were measured using quantitative real-time PCR. The results showed that exposure to TCS enhanced NF-κB activation, increased inflammatory cytokine expression including interleukin (IL) 1β, IL-6, and tumor necrosis factor (TNF) α in the BV-2 cells. The glucose consumption and lactate production in BV2 cell increased sharply after exposure to TCS for 24 h. Based on our qPCR and Western blotting results, the expression of the key glycolysis enzymes-namely hexokinase 1, pyruvate kinase M2, and lactate dehydrogenase A-increased after treatment with 20 μM TCS. Furthermore, inhibiting glycolysis by 2-deoxy-D-glucose reduced the activation of NF-κB and the mRNA expression of the inflammatory cytokines in the TCS-activated BV-2 microglia. The expression of the proteins of the Akt/mTOR/HIF1α pathway examined through Western blotting, which regulates glycolysis, also increased in the BV2 cells exposed to TCS. Moreover, Akt and mTOR inhibition by using LY294002 and rapamycin, respectively, blocked inflammatory cytokine overexpression induced by TCS. In conclusion, TCS can induce glycolysis and directly drive inflammatory activation in microglia; with the mediation of the Akt/mTOR/HIF1α pathway.
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Affiliation(s)
- Jieyu Liu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, PR China
| | - Rui Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, PR China
| | - Dan Wang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, PR China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, PR China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, 110122, PR China.
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Zhang W, Huo T, Li A, Wu X, Feng C, Liu J, Jiang H. Identification of neurotoxicity markers induced by realgar exposure in the mouse cerebral cortex using lipidomics. J Hazard Mater 2020; 389:121567. [PMID: 32061421 DOI: 10.1016/j.jhazmat.2019.121567] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 10/12/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Realgar is a traditional Chinese medicine containing arsenic and has neurotoxicity. This study used realgar exposure mice model, neurobehavioral tests, analytical chemistry, molecular biology and nontargeted lipidomics to explore the mechanism of realgar damages the nervous system. The arsenic contained in realgar passed through the BBB and accumulated in the brain. Neurons, synapses and myelin showed abnormal changes in the cerebral cortex. The number of autophagosomes were incresed as well as levels of MDA, Lp-PLA2, and cPLA2 but the CAT level was significant reduced. Finally, the cognition and memory of mice were decreased. Nontargeted lipidomics detected 34 lipid subclasses including 1603 lipid molecules. The levels of the LPC and LPE were significantly increased. Under the condition of variable importance for the projection (VIP)>1 and P < 0.05, only 28 lipid molecules satisfied the criteria. The lipid molecular markers SM (d36:2), PE (18:2/22:6) and PE (36:3) which were filtered by receiver operating characteristic (ROC) curve (AUC>0.8 or AUC<0.2) were used to identify the neurotoxicity induced by realgar. Therefore, realgar induces neurotoxicity through exacerbating oxidative damage and lipid dysfunction. Providing research basis for the clinical diagnosis and treatment of realgar-induced neurotoxicity.
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Affiliation(s)
- Weiwei Zhang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Aihong Li
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Xinyu Wu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Cong Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Jieyu Liu
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China.
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Cardel MI, Lemas DJ, Lee AM, Miller DR, Huo T, Klimentidis YC, Fernandez JR. Taq1a polymorphism (rs1800497) is associated with obesity-related outcomes and dietary intake in a multi-ethnic sample of children. Pediatr Obes 2019; 14:e12470. [PMID: 30253082 PMCID: PMC6659394 DOI: 10.1111/ijpo.12470] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/18/2018] [Accepted: 05/26/2018] [Indexed: 01/22/2023]
Abstract
BACKGROUND In adults, the Taq1a polymorphism (rs1800497) near the D2 receptor (DRD2) gene is associated with body mass index and binge eating and is more prevalent among non-Hispanic Blacks (NHB) and Hispanic-Americans (HA) relative to non-Hispanic Whites (NHW). We hypothesize Taq1a polymorphism (rs1800497) risk alleles contribute to paediatric racial/ethnic differences in obesity phenotypes. OBJECTIVES This study aims to characterize the relationship between the Taq1a polymorphism (rs1800497), diet and adiposity in a multi-ethnic cohort of 286 children (98 NHB, 76 HA and 112 NHW), ages 7-12. METHODS Dual-energy X-ray absorptiometry, computed tomography scans and two 24-h dietary recalls assessed body composition, fat distribution and dietary intakes, respectively. RESULTS Children with two Taq1a risk alleles (NHB = 50.0%, HA = 43.3%, NHW = 6.7%) reported a 20% increase in total energy intake (P = 0.0034) and per cent of calories from sugar consumed (P = 0.0077) than did children with less than two risk alleles. Children with two Taq1a risk alleles demonstrated significantly higher total body fat (P = 0.0145), body fat percentage (P = 0.0377), intra-abdominal adiposity (P = 0.0459), subcutaneous abdominal adiposity (P = 0.0213) and total abdominal adiposity (P = 0.0209) than did children with one or no Taq1a risk alleles. CONCLUSIONS Our results suggest that having two Taq1a risk alleles is associated with an increase in reported calorie and sugar consumption and is a potential risk factor for early development of excess adiposity in multi-ethnic children. These results need to be confirmed in a larger sample.
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Affiliation(s)
- M. I. Cardel
- Department of Health Outcomes and Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - D. J. Lemas
- Department of Health Outcomes and Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - A. M. Lee
- Department of Health Outcomes and Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - D. R. Miller
- Department of Health Outcomes and Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - T. Huo
- Department of Health Outcomes and Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Y. C. Klimentidis
- Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA
| | - J. R. Fernandez
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL, USA,Department of Nutrition Sciences, School of Public Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA
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Huo T, Fang Y, Zhang Y, Wang Y, Feng C, Yuan M, Wang S, Chen M, Jiang H. Plasma metabolomics study of the hepatoprotective effect of glycyrrhetinic acid on realgar-induced sub-chronic hepatotoxicity in mice via 1H NMR analysis. J Ethnopharmacol 2017; 208:36-43. [PMID: 28673699 DOI: 10.1016/j.jep.2017.06.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 06/14/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Realgar, a type of mineral drug that contains arsenic, is concurrently used with Glycyrrhizae Radx et Rhizoma to reduce its toxicity in many Chinese herbal formulations. Glycyrrhetinic acid (GA) is the bioactive ingredient in Glycyrrhizae Radx et Rhizoma. In this study, the protective effects of GA on realgar-induced hepatotoxicity was investigated using 1H nuclear magnetic resonance (1H NMR)-based metabolomic approaches. MATERIALS AND METHODS Mice were divided into control, GA, realgar, and GA and realgar co-administration groups. Their plasma samples were used for a metabolomics study. RESULTS GA can protect the mice against realgar-induced hepatotoxicity to some extent by relieving alterations in the clinical biochemical parameters and the damage to hepatocytes. Metabolic profiling via principal components analysis (PCA) and partial least squares-discriminant analysis (PLS-DA) indicated that the metabolic perturbation caused by realgar was reduced by GA. Six metabolites, including 3-hydroxybutyrate (3-HB), very low density/low density lipoprotein (VLDL/LDL), N-acetylglycoprotein (NAc), lactate, choline and D-glucose, were considered as potential biomarkers that are involved in the toxicity reduction effect of GA on realgar-induced hepatotoxicity. The correlation analysis showed that these potential biomarkers were all positively correlated with ALT and AST activities (correlation coefficient > 0.5). Lipid and energy metabolism pathways were found to be primarily associated with the hepatoprotective effect of GA. CONCLUSIONS GA has an effective protection function by regulating the lipid and energy metabolism to liver injuries that are induced by realgar.
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Affiliation(s)
- Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Ying Fang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Yinghua Zhang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Yanlei Wang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Cong Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Mingmei Yuan
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Shouyun Wang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Mo Chen
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China.
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Huo T, Fang Y, Zhao L, Xiong Z, Zhang Y, Wang Y, Feng C, Yuan M, Wang S, Chen M, Jiang H. 1HNMR-based metabonomic study of sub-chronic hepatotoxicity induced by realgar. J Ethnopharmacol 2016; 192:1-9. [PMID: 27377338 DOI: 10.1016/j.jep.2016.07.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 06/23/2016] [Accepted: 07/01/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Realgar has been used as a traditional Chinese medicine (TCM) for thousands of years. Recently, a number of realgar or realgar-containing medicines poisoning cases have been reported. However, the toxicological mechanism of realgar has not been clearly clarified. In present study, the subchronic hepatotoxicity of realgar on mice was investigated using 1HNMR-based metabonomic approaches. MATERIALS AND METHODS Twenty-eight male mice were divided into control group and low (0.15g/kg), middle (0.45g/kg), high (1.35g/kg) dosage realgar exposed groups. Their plasma and urine samples were used for NMR spectroscopic metabolic profiling. Principal component analysis (PCA) and pathway analysis were used to detect the hepatotoxic effects of realgar. Liver histopathological examination and plasma clinical chemistry analyses were also performed. RESULTS Plasma clinical chemistry analyses showed increased levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), total protein (TP), total cholesterol (TC) and choline esterase (CHE) in realgar-exposed mice indicating liver injury. The PCA score plots showed the metabolic profiles of realgar-exposed mice apparently separated from the controls. Obvious dose-dependent changes of metabolites in urine and plasma of realgar-exposed mice were observed. From the loading plots and boxplots results, the concentrations of VLDL/LDL, 3-HB, lactate, acetate, acetoacetate, creatine, glutamate, methionine, NAc, TMAO, alanine in plasma and pyruvate, succinate, 2-oxoglutarate, DMA, citrate, hippurate, glycine, taurine, phenylalanine, lactate in urine were significantly changed in realgar-exposed mice. The change trends of metabolites in urine and plasma from mice sub-chronic exposed to realgar are similar to those reported in rats acute exposed to realgar, which indicate the acute and sub-chronic toxic mechanism of realgar are same. The disturbed metabolic pathway include energy metabolism, amino acids metabolism and gut bacteria metabolism. CONCLUSIONS The present work illustrated the NMR-based metabonomic approach can capture and probe the metabolic alterations induced by traditional Chinese medicine in the toxicological effects.
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Affiliation(s)
- Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Ying Fang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China; Department of Identification of Traditional Chinese Medicine, School of Pharmacy, Liaoning University of Traditional Chinese Medicine, Shenyang 110032, PR China
| | - Longshan Zhao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Zhili Xiong
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Yinghua Zhang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Yanlei Wang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Cong Feng
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Mingmei Yuan
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Shouyun Wang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Mo Chen
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, Shenyang 110122, PR China.
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Wang Y, Chen M, Zhang Y, Huo T, Fang Y, Jiao X, Yuan M, Jiang H. Effects of realgar on GSH synthesis in the mouse hippocampus: Involvement of system XAG(-), system XC(-), MRP-1 and Nrf2. Toxicol Appl Pharmacol 2016; 308:91-101. [PMID: 27412851 DOI: 10.1016/j.taap.2016.07.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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: 02/10/2016] [Revised: 06/21/2016] [Accepted: 07/08/2016] [Indexed: 11/16/2022]
Abstract
Realgar is a type of mineral drug that contains arsenic and has neurotoxicity. Glutathione (GSH), which is the main antioxidant in the central nervous system, plays a key role in antioxidant defenses and the detoxification of arsenic. However, whether realgar interferes with the synthesis of GSH in the brain and the molecular mechanisms underlying its effects are largely unknown. Here, we used mouse models of exposure to realgar to show that realgar affects the synthesis of GSH in the hippocampus, leading to ultrastructural changes in hippocampal neurons and synapses and deficiencies in cognitive abilities, and that the mechanisms that cause this effect may be associated with alterations in the expression of system XAG(-), system XC(-), multidrug resistance-associated protein 1(MRP-1), nuclear factor E2-related factor 2 (Nrf2), γ-glutamylcysteine synthetase (γ-GCS), and the levels of glutamate (Glu) and cysteine (Cys) in the extracellular fluid. These findings provide a theoretical basis for preventing the drug-induced chronic arsenic poisoning in the nervous system that is triggered by realgar.
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Affiliation(s)
- Yanlei Wang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China; School of Basic Medical Sciences, North China University of Science and Technology, 46 Xinhua Road, Tangshan, Hebei 063009, People's Republic of China
| | - Mo Chen
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China
| | - Yinghua Zhang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China
| | - Taoguang Huo
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China
| | - Ying Fang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China; School of Pharmacy, Liaoning University of Traditional Chinese Medicine, No. 77 Shenning1 Road, Double D Port, Dalian, Liaoning 116600, People's Republic of China
| | - Xuexin Jiao
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China
| | - Mingmei Yuan
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China; School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China
| | - Hong Jiang
- Department of Health Laboratory Technology, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, People's Republic of China.
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Lü S, Jiang M, Huo T, Li X, Zhang Y. 3-hydroxy-3-methyl glutaryl coenzyme A reductase: an essential actor in the biosynthesis of cantharidin in the blister beetle Epicauta chinensis Laporte. Insect Mol Biol 2016; 25:58-71. [PMID: 26566751 DOI: 10.1111/imb.12198] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 06/05/2023]
Abstract
Cantharidin (C(10)H(12)O(4)) is a monoterpene defensive toxin in insects involved in chemical defence as well as in courtship and mating behaviours. It is relatively well known in the medical literature because of its high anticancer activity and as an effective therapy for molluscum contagiosum. However, little is known about its biosynthesis pathway in vivo, and no enzyme involved in cantharidin biosynthesis has been identified. The purpose of this study was to identify the crucial enzyme that is involved in the biosynthesis of cantharidin. Using the homology cloning method, a 3-hydroxy-3-methyl glutaryl coenzyme A reductase (HMGR) gene, the rate-limiting enzyme in the mevalonate pathway, was cloned from the blister beetle Epicauta chinensis. Quantitative reverse transcription PCR and gas chromatography methods revealed that the HMGR transcripts had a positive correlation with cantharidin production in the beetles (R = 0.891). RNA interference (RNAi) knockdown of HMGR mRNA expression was achieved by microinjection of a specific double-stranded RNA with more than 90% RNAi efficiency, and an apparent decrease of cantharidin production was observed. Furthermore, the HMGR mRNA was greatly upregulated by exogenous juvenile hormone III (JH III), and cantharidin production was also raised in males; however, when injecting the JH III with RNAi of HMGR mRNA at the same time, cantharidin production did not rise. These results demonstrate that HMGR is an essential enzyme in cantharidin biosynthesis in the blister beetle E. chinensis, which further verifies previous research results demonstrating that cantharidin is synthesized de novo by the mevalonate pathway in blister beetles.
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Affiliation(s)
- S Lü
- Key Laboratory of Plant Protection Resources and Pest Management, National Ministry of Education, Northwest A&F University, Yangling, Shaanxi, China
| | - M Jiang
- Key Laboratory of Plant Protection Resources and Pest Management, National Ministry of Education, Northwest A&F University, Yangling, Shaanxi, China
| | - T Huo
- Key Laboratory of Plant Protection Resources and Pest Management, National Ministry of Education, Northwest A&F University, Yangling, Shaanxi, China
| | - X Li
- Department of Entomology, The University of Arizona, Tucson, AZ, USA
| | - Y Zhang
- Key Laboratory of Plant Protection Resources and Pest Management, National Ministry of Education, Northwest A&F University, Yangling, Shaanxi, China
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Xiong F, Tong Y, Li P, Huo T, Mao M. Serum immunoglobulin E level and its impact on the pregnancy outcome associated with fetal growth restriction: a prospective cohort study. Genet Mol Res 2015; 14:3879-88. [PMID: 25966159 DOI: 10.4238/2015.april.27.2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We evaluated the relationship between total serum immunoglobulin E (IgE) levels and pregnancy outcome in a prospective cohort study focusing on fetal growth restriction (FGR). Sixty women with FGR and twenty with normal singleton pregnancy were enrolled during their third trimester. Infants were followed up for 6 months. Blood samples were obtained from pregnant women during the third trimester; cord blood samples were also taken. Six months after birth, blood samples were obtained from infants. Demographic and baseline characteristics were compared between groups. Birth weight, length and head circumference of neonates in the FGR group were lower than those in the control group. Total serum IgE level was significantly increased in third-trimester pregnant women with FGR compared with normal group (P < 0.05). However, this trend was not observed in the cord blood at birth or peripheral blood of 6-month-old infants. The prevalence of atopic eczema between the 2 groups was similar. Linear regression analysis revealed that the IgE level in the third trimester was negatively correlated with birth weight (P < 0.05). Higher serum IgE level in the cord blood was significantly associated with an increased risk of being small for gestational age (P < 0.05). In conclusion, IgE levels in the third trimester of pregnancy and cord blood are strongly related to birth outcomes of FGR.
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Affiliation(s)
- F Xiong
- Department of Pediatrics, West China Second University Hospital, Sichuan University, China
| | - Y Tong
- Laboratory of Early Developmental and Injuries, West China Institute of Woman and Children's Health, West China Second University Hospital, Sichuan University, China
| | - P Li
- Laboratory of Early Developmental and Injuries, West China Institute of Woman and Children's Health, West China Second University Hospital, Sichuan University, China
| | - T Huo
- Laboratory of Early Developmental and Injuries, West China Institute of Woman and Children's Health, West China Second University Hospital, Sichuan University, China
| | - M Mao
- Laboratory of Early Developmental and Injuries, West China Institute of Woman and Children's Health, West China Second University Hospital, Sichuan University, China
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Huo T, Zhang Y, Li W, Yang H, Jiang H, Sun G. Effect of realgar on extracellular amino acid neurotransmitters in hippocampal CA1 region determined by online microdialysis–dansyl chloride derivatization–high-performance liquid chromatography and fluorescence detection. Biomed Chromatogr 2015; 28:1254-62. [PMID: 25237708 DOI: 10.1002/bmc.3154] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An online microdialysis (MD)–dansyl chloride (Dns) derivatization–high-performance liquid chromatography (HPLC) and fluorescence detection (FD) system was developed for simultaneous determination of eight extracellular amino acid neurotransmitters in hippocampus. The MD probe was implanted in hippocampal CA1 region. Dialysate and Dns were online mixed and derivatized. The derivatives were separated on an ODS column and detected by FD. The developed online system showed good linearity, precision, accuracy and recovery. This online MD-HPLC system was applied to monitor amino acid neurotransmitters levels in rats exposed to realgar (0.3, 0.9 and 2.7 g/kg body weight). The result shows that glutamate concentrations were significantly increased (p<0.05) in hippocampal CA1 region of rats exposed to three doses of realgar. A decrease in γ-aminobutyric acid concentrations was found in rats exposed to medium and high doses of realgar (p<0.05). Elevation of excitotoxic index (EI) values in hippocampal CA1 region of realgar-exposed rats was observed (p<0.05). Positive correlation was found between EI values and arsenic contents in hippocampus of realgar-exposed rats, which indicates that the change in extracellular EI values is associated with arsenic accumulation in hippocampus. The developed online MD–Dns derivatization–HPLC–FD system provides a new experimental method for studying the effect of toxic Chinese medicines on amino acid neurotransmitters.
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Song W, Huo T, Guo F, Wang H, Wei H, Yang Q, Dong H, Wang Q, Xiong L. Globular adiponectin elicits neuroprotection by inhibiting NADPH oxidase-mediated oxidative damage in ischemic stroke. Neuroscience 2013; 248:136-44. [PMID: 23756185 DOI: 10.1016/j.neuroscience.2013.05.063] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [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: 03/25/2013] [Revised: 05/09/2013] [Accepted: 05/31/2013] [Indexed: 12/12/2022]
Abstract
Recent studies indicate that adiponectin can attenuate cerebral ischemic lesions via its functional area located in the C-terminal globular domain, which is called globular adiponectin (gAD). However, the mechanisms underlying this action remain unclear. In this study, we investigated the antioxidant properties of gAD during cerebral ischemia. Adult male C57BL/6 mice received an intracerebral injection of gAD with or without tetrabromocinnamic acid (TBCA, a NADPH oxidase activator). Mice were subjected to middle cerebral artery occlusion (MCAO) after gAD injection. Infarct volume, neurological function, the activity of antioxidant enzymes (superoxide dismutase [SOD], catalase), the content of malondialdehyde (MDA), and the expression of Bax, Bcl-2, cleaved caspase-3 and NADPH oxidase 2 (NOX2) were examined at 24h after MCAO. Infarct volume was attenuated in gAD-transduced mice when compared with mice in the MCAO group, with significant improvement in neurological function. In addition, neuronal apoptosis was attenuated, along with the expression of Bax/Bcl-2 and cleaved caspase 3. Furthermore, the activities of SOD and catalase increased, and the content of MDA reduced. However, TBCA blocked the effect of gAD on cerebral protection and its antioxidant abilities. Taken together, these results demonstrate that the neuroprotective action of gAD may result from the promotion of antioxidant capacity by inhibiting the NOX2 signaling system.
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Affiliation(s)
- W Song
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China; Department of Anesthesiology, Shaanxi Province People's Hospital, Xi'an 710068, Shaanxi Province, PR China
| | - T Huo
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - F Guo
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - H Wang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - H Wei
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - Q Yang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - H Dong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - Q Wang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China.
| | - L Xiong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China.
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Huo T, Chang B, Zhang Y, Chen Z, Li W, Jiang H. Alteration of amino acid neurotransmitters in brain tissues of immature rats treated with realgar. J Pharm Biomed Anal 2012; 57:120-4. [DOI: 10.1016/j.jpba.2011.08.032] [Citation(s) in RCA: 17] [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: 05/05/2011] [Revised: 08/18/2011] [Accepted: 08/19/2011] [Indexed: 10/17/2022]
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Zhang H, Huo T, Barth R. SU-GG-T-123: Theoretical and Experimental Determination of Therapeutic Advantage of Single Fraction Megavoltage Grid Therapy for F98 Glioma Brain Tumor Cell Lines. Med Phys 2010. [DOI: 10.1118/1.3468512] [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: 11/07/2022] Open
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Xiong Z, Sun X, Huo T, Li N, Zheng Y, Sun Y. Development and validation of UPLC-MS/MS method for simultaneous determination of gestodene and ethinyl estradiol in rat plasma. Biomed Chromatogr 2010; 24:160-8. [PMID: 19591119 DOI: 10.1002/bmc.1265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A selective and sensitive ultra-performance liquid chromatography method with tandem mass spectrometric detection for simultaneous determination of gestodene (GES) and ethinyl estradiol (EE) in rat plasma was developed and validated. GES, EE and the internal standard, norgestrel, were extracted with ethyl acetate, derivatized (EE only) with dansyl chloride and then back-extracted into diethyl ether-hexane (2:1, v/v). The separation was performed on an ACQUITY UPLC BEH C(18) column with gradient elution using mobile phase consisting of acetonitrile and water (both containing 0.1% formic acid). The detection was carried out by means of electrospray ionization (ESI) mass spectrometry in positive ion mode with multiple-reaction monitoring. Calibration curves of GES and EE were linear (r(2) >or= 0.99) over the concentration ranges 1.59-159 and 0.196-78.4 ng/mL, respectively. The intra- and inter-day precisions were not more than 6.9 and 12.9% for GES and 10.6 and 9.0% for EE, and the accuracies were -2.5-8.0% for GES, and -7.2-0.19% for EE, respectively. The method herein described was superior to previous methods and was applicable to the pharmacokinetic study of GES and EE in rats.
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Affiliation(s)
- Zhili Xiong
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shengyang 110016, People's Republic of China.
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Zheng S, Yu M, Lu X, Huo T, Ge L, Yang J, Wu C, Li F. Urinary metabonomic study on biochemical changes in chronic unpredictable mild stress model of depression. Clin Chim Acta 2010; 411:204-9. [DOI: 10.1016/j.cca.2009.11.003] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2009] [Revised: 11/01/2009] [Accepted: 11/02/2009] [Indexed: 11/17/2022]
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Cai S, Huo T, Li N, Xiong Z, Li F. Lysophosphatidylcholine-biomarker of Metformin action: studied using UPLC/MS/MS. Biomed Chromatogr 2009; 23:782-6. [DOI: 10.1002/bmc.1185] [Citation(s) in RCA: 14] [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: 11/08/2022]
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Thakkar SK, Huo T, Maziya‐Dixon B, Failla ML. Retention and bioaccessibility of B‐carotene in cassava (Manihot esculanta, Crantz) are affected by style of cooking. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.896.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - T. Huo
- Human NutritionThe Ohio State UniversityColumbusOH
| | - B. Maziya‐Dixon
- International Institute of Tropical Agriculture (IITA)IbadanNigeria
| | - M. L. Failla
- Human NutritionThe Ohio State UniversityColumbusOH
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Huo T, Cai S, Lu X, Sha Y, Yu M, Li F. Metabonomic study of biochemical changes in the serum of type 2 diabetes mellitus patients after the treatment of metformin hydrochloride. J Pharm Biomed Anal 2009; 49:976-82. [PMID: 19249171 DOI: 10.1016/j.jpba.2009.01.008] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Revised: 01/05/2009] [Accepted: 01/09/2009] [Indexed: 01/02/2023]
Abstract
A metabonomic study on biochemical changes in the serum of type 2 diabetes mellitus patients after the treatment of metformin hydrochloride was performed. (1)H NMR and UPLC/MS were used to generate metabolic fingerprints for the metabonomic analysis of serum samples obtained from 20 type 2 diabetes mellitus patients without any drugs treatment and 15 type 2 diabetes mellitus patients treated with metformin hydrochloride for 3 months. The resulting data were subjected to chemometric analysis (principal component analysis and partial least squares discriminant analysis) to investigate the effect of metformin hydrochloride on serum metabolite profiles of type 2 diabetes mellitus patients. (1)H NMR spectroscopic analysis revealed increased trimethylamine-N-oxide (TMAO), 3-hydroxybutyrate (3-HB) and decreased glucose, N-acetyl glycoprotein (NAC), lipoprotein, lactate, acetoacetate and unsaturated lipids in serum from metformin treated patients compared to untreated ones. UPLC/MS in positive electrospray ionization detected increased tryptophan and decreased lysophosphatidylcholines (C16:0 LPC, C18:0 LPC and C18:2 LPC) as well as phenylalanine in treated group. Both analytical techniques used in this study were able to detect biochemical changes in the serum of type 2 diabetes mellitus patients after the treatment of metformin hydrochloride, which may be helpful to the understanding of action mechanism of metformin hydrochloride.
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Affiliation(s)
- Taoguang Huo
- Department of Analytical Chemistry, Shenyang Pharmaceutical University, Shenyang, PR China
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Cai S, Huo T, Feng W, Chen L, Qin F, Li F. Quantitative determination of mitiglinide in human plasma by ultra-performance liquid chromatography/electrospray ionization tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 868:83-7. [DOI: 10.1016/j.jchromb.2008.04.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2007] [Revised: 04/17/2008] [Accepted: 04/24/2008] [Indexed: 11/26/2022]
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Li X, Huo T, Qin F, Lu X, Li F. Determination and pharmacokinetics of orientin in rabbit plasma by liquid chromatography after intravenous administration of orientin and Trollius chinensis Bunge extract. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 853:221-6. [PMID: 17416555 DOI: 10.1016/j.jchromb.2007.03.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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: 12/09/2006] [Revised: 03/12/2007] [Accepted: 03/14/2007] [Indexed: 11/27/2022]
Abstract
A high-performance liquid chromatography (HPLC) method was developed and validated for the determination of orientin in rabbit plasma using ultraviolet (UV) absorbance detection. Orientin is the active constituent of purified herbal extract (TRO PE) from the flower of Trollius chinensis Bunge. Protein precipitation was used as the sample preparation technique. A Diamonsil C18 column (150 mmx4.6 mm, 5 microm) was equilibrated with a mobile phase composed of 0.1% acetic acid/methanol/acetonitrile (80/5/15, v/v/v). The calibration curve of orientin in rabbit plasma was linear in the concentration range of 0.530-53.0 microg/mL. This validated method was successfully applied to a pharmacokinetic study in rabbits after the intravenous administrations of orientin and TRO PE at three different doses.
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Affiliation(s)
- Xiaoqin Li
- Department of Analytical Chemistry, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
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Huo T, Huang YH, Wu JC, Chiang JH, Lee PC, Chang FY, Lee SD. Comparison of transarterial chemoembolization and percutaneous acetic acid injection as the primary loco-regional therapy for unresectable hepatocellular carcinoma: a prospective survey. Aliment Pharmacol Ther 2004; 19:1301-8. [PMID: 15191512 DOI: 10.1111/j.1365-2036.2004.01996.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Transarterial chemoembolization (TACE) and percutaneous acetic acid injection (PAI) are effective loco-regional therapies for hepatocellular carcinoma (HCC). AIM To compare the therapeutic efficacy of TACE vs. PAI for unresectable HCC. METHODS A total of 310 patients with unresectable HCCs (size <or=6 cm) undergoing TACE (n = 195) or PAI (n = 115) were studied prospectively. Overall and progression-free survivals were measured endpoints. RESULTS The overall survival was not significantly different between the two groups (P = 0.508). Among 129 patients with large (3.1-6 cm) HCCs, the overall survival was significantly better for the TACE group (P = 0.018). Cox multivariate analysis showed that Child-Pugh B [relative risk (RR): 4.2, 95% confidence interval (CI): 2.3-7.7, P < 0.001] and PAI therapy (RR: 1.4, 95%: 1.0-1.9, P = 0.057) were poor prognostic predictors; the progression-free survival was also significantly better in the TACE group (P = 0.038). Among 181 patients with small (<or=3 cm) HCCs, there was no significant difference of overall survival (P = 0.265) or progression-free survival (P = 0.146) between the two groups; Child-Pugh B was the only prognostic factor predicting a decreased survival (RR: 2.8, 95% CI: 1.7-4.8, P < 0.001). CONCLUSIONS Patients with large HCC undergoing TACE tend to have a more favourable long-term outcome. For small HCC, either TACE or PAI therapy could be recommended as the primary treatment modality.
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Affiliation(s)
- T Huo
- Department of Medicine, Taipei Veterans General Hospital and National Yang-Ming University School of Medicine, Taipei, Taiwan.
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Huo T, Wu JC, Hwang SJ, Lai CR, Lee PC, Tsay SH, Chang FY, Lee SD. Factors predictive of liver cirrhosis in patients with chronic hepatitis B: a multivariate analysis in a longitudinal study. Eur J Gastroenterol Hepatol 2000; 12:687-93. [PMID: 10912490 DOI: 10.1097/00042737-200012060-00019] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE AND DESIGN Chronic hepatitis B virus (HBV) infection may lead to liver cirrhosis; however, factors associated with the development of cirrhosis have been incompletely studied. A total of 516 patients with chronic hepatitis B were followed up longitudinally to determine their outcome. METHODS The clinical and pathological features were compared between those with and without cirrhosis occurrence. The risk factors were analysed, and the probability of the development of cirrhosis was estimated. RESULTS During a mean follow-up period of 5.7 +/- 3.4 years (range 1-17 years), cirrhosis occurred in 71 patients, with a calculated annual incidence of 2.4%. Older age (> 45 years) at entry, male gender, persistent hepatitis (> 1.5-fold rise of serum alanine aminotransferase levels for at least one year) and diabetes mellitus were identified as independent risk factors of cirrhosis in a multivariate analysis (odds ratios 8.0, 19.3, 2.0 and 5.2, respectively; P values all < 0.05). A logistic regression equation was used to predict the probability of cirrhosis occurrence, which was as high as 76.6% when all risk factors were present. Acute exacerbation or super-infection by hepatitis C or D viruses were not significant predictors. Patients with subsequent cirrhosis had higher initial hepatic histological necro-inflammatory activities when compared to age- and sex-matched non-cirrhotic controls (Knodell's scores: 8.2 +/- 2.4 versus 6.0 +/- 4.1, P< 0.05). CONCLUSIONS Patients who were elderly, male, diabetic or had a history of persistent and histologically severe hepatitis were at increased risks of liver cirrhosis. Aggressive anti-viral therapy may be needed for these patients and they should be closely monitored for HBV-related late complications.
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Affiliation(s)
- T Huo
- Department of Medicine, Taipei Veterans General Hospital and National Yang-Ming University School of Medicine, Taiwan, Republic of China.
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Huo T, Healy DP. [3H]domperidone binding to the kidney inner medullary collecting duct dopamine-2K (DA2K) receptor. J Pharmacol Exp Ther 1991; 258:424-8. [PMID: 1830902] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Previous studies by our laboratory have indicated that inner medullary collecting ducts (IMCDs) express a novel dopamine (DA) receptor, designated DA2K, that is linked to stimulation of prostaglandin E2 production. This receptor has a distinct pharmacological profile and is similar in size, but not homologous to, the brain D2 receptor. Because the DA2-selective antagonist domperidone blocks DA-mediated stimulation of prostaglandin E2 production in IMCD cells, we utilized [3H]domperidone to study the binding characteristics of the DA2K receptor in IMCD cells. [3H]Domperidone binding was saturable and best fit to a single high density site (KD, 57.6 +/- 10.5 nM; Bmax, 14.9 +/- 2.7 pmol/mg protein). The specificity of [3H]domperidone binding in IMCD cells was verified by competition analysis with a variety of dopaminergic and nondopaminergic agents. Dopaminergic drugs were less potent competitors for [3H]domperidone binding in IMCD cells than previously reported for brain DA receptors, but the rank order was consistent with the labeling of a DA receptor [antagonists: domperidone greater than spiperone greater than haloperidol greater than Sch 23390 much greater than (-)-sulpiride; agonists: norapomorphine greater than fenoldopam much greater than dopamine = quinpirole], and was better correlated with the pharmacological profile for the brain D2 receptor than the brain D3 receptor. In addition, quinpirole, the most D3-selective ligand currently available, did not compete for [3H]domperidone binding in IMCD cells. These results add further support to the existence of a novel high density DA receptor, DA2K, expressed in IMCD cells.
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Affiliation(s)
- T Huo
- Department of Pharmacology, Mount Sinai School of Medicine, City University of New York, New York
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Abstract
Dopamine (DA) produces a natriuretic/diuretic response in the kidney by mechanisms that are still not well understood. There is some indication that DA2 receptors may be involved in mediating the effects of DA, but little is known regarding the nature of this receptor in the kidney. Autoradiographic localization of [3H]spiperone, a DA2 antagonist, indicated that high-density binding was restricted to inner medullary collecting ducts (IMCDs). [3H]Spiperone binding was saturable, high affinity (Kd, 17.2 +/- 1.65 nM), and high density (Bmax, 935 +/- 83 fmol per mg of protein). The photosensitive spiperone analogue N-(p-azido-m-[125I]iodophenethyl)spiperone labeled similar sized proteins of Mr = 120,000 in membranes prepared from the kidney inner medulla, striatum, and pituitary. However, the rank-order competition profile for the [3H]spiperone binding in the kidney inner medulla differed from the DA2 receptor in striatum and pituitary and, furthermore, RNA (Northern) blot analyses of kidney inner medullary RNA with brain DA2 receptor oligonucleotide probes were negative. Functionally, DA stimulated prostaglandin E2 production by IMCD cells, an effect that could be blocked by the DA2 antagonist domperidone. These results indicate that the kidney inner medulla expresses a functional DA receptor that may represent a newly identified DA receptor subtype (here designated DA2K). Moreover, these results suggest that the kidney inner medulla may be a significant site at which DA, either directly or indirectly, influences water and electrolyte excretion.
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Affiliation(s)
- T Huo
- Department of Pharmacology, Mount Sinai School of Medicine, City University of New York, NY 10029
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Abstract
Dopamine receptors in the rat kidney were characterized by homogenate binding and in vitro autoradiography using the dopamine 1 (DA1)-selective antagonist [3H]Sch 23390. [3H]Sch 23390 binding in cortical membrane preparations was saturable, stereoselective, and competed for by DA agonists and antagonists with a rank order of potency consistent with the labeling of the DA1 receptor. [3H]Sch 22390 binding was best fit to a two-site model: a high affinity-low density site (KD1 4.9 +/- 1.4 nM, Bmax 1 31.4 +/- 13.8 fmol/mg protein) and a low affinity-high density site (KD2 86.4 +/- 23.9 nM, Bmax 2 848.0 +/- 227.4 fmol/mg protein). In vitro autoradiography indicated that [3H]Sch 22390 binding sites were restricted to the cortex. High-resolution autoradiography further indicated that [3H]Sch 22390 binding sites were localized primarily on proximal tubules. Glomeruli and other vascular elements were devoid of [3H]Sch 23390 binding sites. These results suggest that DA and DA1 agonists may affect sodium excretion by a direct action on proximal tubule sodium reabsorption.
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Affiliation(s)
- T Huo
- Department of Pharmacology, Mount Sinai School of Medicine, City University of New York, New York 10029
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