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Li MH, Zheng H, Choi EJ, Nahm FS, Choe GY, Lee PB. Therapeutic effect of epidural dexamethasone palmitate in a rat model of lumbar spinal stenosis. Reg Anesth Pain Med 2024:rapm-2024-105530. [PMID: 38960590 DOI: 10.1136/rapm-2024-105530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 05/28/2024] [Indexed: 07/05/2024]
Abstract
BACKGROUND Dexamethasone palmitate (DEP), a prodrug of dexamethasone (DEX), is a synthetic corticosteroid medication distinguished by the inclusion of a fatty acid component known as palmitate. This study introduces DEP as a novel therapeutic option for spinal epidural injection, aiming to provide safer and longer-lasting pain relief as an alternative to for patients with spinal stenosis. METHODS 40 rats were randomly divided into four groups: those receiving epidural administration of normal saline (NS), and DEP in the lumbar spinal stenosis (LSS) model, and non-model rats receiving epidural NS administration. Paw withdrawal thresholds to mechanical stimulation and motor function (neurogenic intermittent claudication) were observed for up to 21 days. Hematology and blood chemistry analyses were performed 1 week after drug therapy. Tissue samples were collected for steroid pathology examination to evaluate adhesion degree, perineural area inflammation, and chromatolysis in the dorsal root ganglion (DRG), and adrenal gland. RESULTS The DEX and DEP groups demonstrated significant recovery from mechanical allodynia and motor dysfunction after 2 weeks of drug therapy (p<0.001). However, by the third week, the effect of DEX started to diminish while the effect of DEP persisted. Furthermore, the DEP group exhibited reduced fibrosis and less chromatolysis than the NS group. No steroid overdose or toxin was observed in any group. CONCLUSION The epidural administration of DEP demonstrated therapeutic efficacy in reducing allodynia and hyperalgesia resulting from chronic DRG compression, thus offering prolonged pain relief. These findings underscore the potential of DEP as a promising treatment alternative for pain associated with LSS, serving as a viable substitute for .
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Affiliation(s)
- Mei Hui Li
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Jongno-gu, Korea (the Republic of)
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (the Republic of)
| | - Haiyan Zheng
- Department of Anesthesiology, Zhejiang University School of Medicine First Affiliated Hospital, Hangzhou, Zhejiang, China
| | - Eun Joo Choi
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (the Republic of)
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Jongno-gu, Seoul, Korea (the Republic of)
| | - Francis Sahngun Nahm
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (the Republic of)
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Jongno-gu, Seoul, Korea (the Republic of)
| | - Ghee Young Choe
- Pathology, Seoul National University Bundang Hospital, Seongnam, Korea (the Republic of)
- Pathology, Seoul National University College of Medicine, Jongno-gu, Seoul, Korea (the Republic of)
| | - Pyung Bok Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea (the Republic of)
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Jongno-gu, Seoul, Korea (the Republic of)
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Cho J, Kang KN, Lee MS, Kim YU. Surgical versus nonsurgical management of lumbar degenerative spondylolisthesis based on spinal canal cross-sectional area. Medicine (Baltimore) 2024; 103:e36874. [PMID: 38215145 PMCID: PMC10783222 DOI: 10.1097/md.0000000000036874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 12/15/2023] [Indexed: 01/14/2024] Open
Abstract
Disability and pain associated with lumbar degenerative spondylolisthesis (LDS) result in a significant burden on both the healthcare costs and patients' quality of life. Currently, there exists controversy regarding employment of either nonsurgical management (NSM) or surgical management (SM) in a clinical setting. Spinal canal cross-sectional area (SCA) has been an important morphological parameter for the analysis of LDS. However, there is lack of research about the comparative value of NSM and SM according to SCA. Moreover, previous research have not yet evaluated the clinical most suitable cutoff values of SCA. The objective of this research was to evaluate the effective of NSM and SM for LDS using SCA as an objective morphological parameter. The axial T2 magnetic resonance imaging images were obtained from each patient. We collected SCA samples from 149 patients with LDS. 72 patients underwent SM and the rest did NSM. We measured SCA at the L4/5 LDS on magnetic resonance imaging using a picture archiving and communications system. We measured SCA at the intervertebral disk posterior border, turning down to reach the facet joint side on the opposite edge at the L4/5 level. The average SCA value was 114.34 ± 48.11 mm2 in the NSM group and 69.88 ± 27.87 mm2 in the SM group. Therefore, the SM group had considerably lower SCA (P < .001). In view of the effectiveness of SCA as a prediction factor of surgical option, Receiver Operating Characteristic curve analysis show the optimal cutoff value for SCA as 83.21 mm2, with 70.8% sensitivity, 71.4% specificity, and an area under the curve of 0.80 (95% CI, 0.73-0.87). The narrower the SCA, the higher the probability of SM. Thus, it is proposed that to evaluate surgical decision making, the pain physician should carefully inspect the SCA.
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Affiliation(s)
- Jaeho Cho
- Department of Anesthesiology and Pain Medicine, Seoul National University, College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Keum Nae Kang
- Department of Anesthesiology and Pain Medicine, National Police Hospital, Seoul, Republic of Korea
| | - Min Sang Lee
- Department of Anesthesiology and Pain Medicine, National Police Hospital, Seoul, Republic of Korea
| | - Young Uk Kim
- Department of Anesthesiology and Pain Medicine, Catholic Kwandong University, College of Medicine, International St. Mary’s Hospital, Incheon, Republic of Korea
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The Role of Prostaglandin E1 as a Pain Mediator through Facilitation of Hyperpolarization-Activated Cyclic Nucleotide-Gated Channel 2 via the EP2 Receptor in Trigeminal Ganglion Neurons of Mice. Int J Mol Sci 2021; 22:ijms222413534. [PMID: 34948328 PMCID: PMC8706703 DOI: 10.3390/ijms222413534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 12/06/2021] [Accepted: 12/13/2021] [Indexed: 01/14/2023] Open
Abstract
Cyclooxygenase metabolizes dihomo-γ-linolenic acid and arachidonic acid to form prostaglandin (PG) E, including PGE1 and PGE2, respectively. Although PGE2 is well known to play an important role in the development and maintenance of hyperalgesia and allodynia, the role of PGE1 in pain is unknown. We confirm whether PGE1 induced pain using orofacial pain behavioral test in mice and determine the target molecule of PGE1 in TG neurons with whole-cell patch-clamp and immunohistochemistry. Intradermal injection of PGE1 to the whisker pads of mice induced a reduced threshold, enhancing the excitability of HCN channel-expressing trigeminal ganglion (TG) neurons. The HCN channel-generated inward current (Ih) was increased by 135.3 ± 4.8% at 100 nM of PGE1 in small- or medium-sized TG, and the action of PGE1 on Ih showed a concentration-dependent effect, with a median effective dose (ED50) of 29.3 nM. Adenylyl cyclase inhibitor (MDL12330A), 8-bromo-cAMP, and the EP2 receptor antagonist AH6809 inhibited PGE1-induced Ih. Additionally, PGE1-induced mechanical allodynia was blocked by CsCl and AH6809. PGE1 plays a role in mechanical allodynia through HCN2 channel facilitation via the EP2 receptor in nociceptive neurons, suggesting a potential therapeutic target in that PGE1 could be involved in pain as endogenous substances under inflammatory conditions.
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Lee HJ, Ju J, Choi E, Nahm FS, Choe GY, Lee PB. Effect of epidural polydeoxyribonucleotide in a rat model of lumbar foraminal stenosis. Korean J Pain 2021; 34:394-404. [PMID: 34593657 PMCID: PMC8494961 DOI: 10.3344/kjp.2021.34.4.394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 11/05/2022] Open
Abstract
Background We aimed to investigate the effect of epidural polydeoxyribonucleotide (PDRN) on mechanical allodynia and motor dysfunction in a rat model of lumbar foraminal stenosis (LFS). Methods This study was conducted in two stages, using male Sprague-Dawley rats. The rats were randomly divided into eight groups. In the first stage, the groups were as follows vehicle (V), sham (S), and epidural PDRN at 5 (P5), 8 (P8), and 10 (P10) mg/kg; and in the second stage, they were as follows intraperitoneal PDRN 8 mg/kg, epidural 3,7-dimethyl-1-propargilxanthine (DMPX) (0.1 mg/kg), and DMPX (0.1 mg/kg). The LFS model was established, except for the S group. After an epidural injection of the test solutions, von Frey and treadmill tests were conducted for 3 weeks. Subsequently, histopathologic examinations were conducted in the V, S, P5, and P10 groups. Results A total of 65 rats were included. The P8 and P10 groups showed significant recovery from mechanical allodynia and motor dysfunction at all time points after drug administration compared to the V group. These effects were abolished by concomitant administration of DMPX. On histopathological examination, no epineurial inflammation or fibrosis was observed in the epidural PDRN groups. Conclusions Epidural injection of PDRN significantly improves mechanical allodynia and motor dysfunction in a rat model of LFS, which is mediated by the spinal adenosine A2A receptor. The present data support the need for further research to determine the role of epidural PDRN in spinal stenosis treatment.
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Affiliation(s)
- Ho-Jin Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Korea.,Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jiyoun Ju
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Eunjoo Choi
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Korea.,Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Francis Sahngun Nahm
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Korea.,Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Ghee Young Choe
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Korea.,Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Pyung Bok Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Korea.,Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
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Usefulness of the Inferior Articular Process's Cross-Sectional Area as a Morphological Parameter for Predicting Central Lumbar Spinal Stenosis. J Clin Med 2020; 9:jcm9010214. [PMID: 31941110 PMCID: PMC7019757 DOI: 10.3390/jcm9010214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/27/2019] [Accepted: 01/08/2020] [Indexed: 11/23/2022] Open
Abstract
Hypertrophy of facet joints is associated with a high risk of central lumbar spinal stenosis (CLSS). However, no research has reported the effect of inferior articular process hypertrophy in CLSS. We hypothesize that the inferior articular process’s cross-sectional area (IAPCSA) is larger in patients with CLSS compared to those without CLSS. Data on IAPCSA were obtained from 116 patients with CLSS. A total of 102 control subjects underwent lumbar spine magnetic resonance imaging (LS-MRI) as part of a routine medical examination. Axial T1-weighted images were obtained from the two groups. Using an imaging analysis system, we investigated the cross-sectional area of the inferior articular process. The average IAPCSA was 70.97 ± 13.02 mm2 in control subjects and 88.77 ± 18.52 mm2 in patients with CLSS. CLSS subjects had significantly greater levels of IAPCSA (p < 0.001) than controls. A receiver operating characteristic (ROC) curve was plotted to determine the validity of IAPCSA as a predictor of CLSS. The most suitable cut-off point of IAPCSA for predicting CLSS was 75.88 mm2, with a sensitivity of 71.6%, a specificity of 68.6%, and an area under the curve (AUC) of 0.78 (95% CI: 0.72–0.84). Greater IAPCSA levels were associated with a higher incidence of CLSS. These results demonstrate that IAPCSA is a useful morphological predictor in the evaluation of CLSS.
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An SJ, Mun JU, Kang KN, Kim YU. Superior articular process cross-sectional area is a new sensitive parameter for the diagnosis of lumbar central canal spinal stenosis. Clin Interv Aging 2018; 13:1763-1767. [PMID: 30271131 PMCID: PMC6152598 DOI: 10.2147/cia.s172355] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Purpose Previous studies reported that hypertrophied superior articular process (SAP) was associated with an increased risk of lumbar foraminal stenosis. However, no study investigated the effect of SAP hypertrophy in lumbar central canal spinal stenosis (LCCSS). We hypothesized that the SAP cross-sectional area (SAPCSA) is the main morphologic feature in the diagnosis of LCCSS. Patients and methods Data regarding the SAPCSA were collected from 109 patients with LCCSS. All patients were enrolled after the LCCSS diagnosis was confirmed by an experienced, board-certified neuroradiologist. All patients had clinical manifestations compatible with LCCSS. A total of 120 subjects in the control group underwent lumbar spine MRI as part of non-symptomatic medical examination. T2-weighted axial images were obtained from the 2 groups. Using a picture archiving and communications system, we analyzed the CSA of the bone margin of SAP at the level of L4–L5 facet joint on MRI. Results The average SAPCSA was 96.63±13.37 mm2 in the control group, and 123.59±14.18 mm2 in the LCCSS. The LCCSS group showed significantly higher levels of the SAPCSA (P<0.001) compared with the control one. Receiver operator characteristic (ROC) curve analysis was performed to determine the validity of the SAPCSA as a predictor of LCCSS. In the LCCSS group, the optimal cut-off-point was 110.71 mm2, with 83.5% sensitivity, 83.3% specificity, and area under the curve of 0.92 (95% CI: 0.88–0.95). Conclusion Higher SAPCSA values were associated with a higher possibility of LCCSS. These results are important in the evaluation of patients with LCCSS.
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Affiliation(s)
- Sang Joon An
- Department of Neurology, Catholic Kwandong University of Korea College of Medicine, International St Mary's Hospital, Incheon, Korea
| | - Jong-Uk Mun
- Department of Orthopaedic Surgery, Changwon Gyeongsang National University Hospital, Changwon, Korea
| | - Keum Nae Kang
- Department of Anesthesiology and Pain Medicine, National Police Hospital, Seoul, Korea
| | - Young Uk Kim
- Department of Anesthesiology and Pain Medicine, Catholic Kwandong University of Korea College of Medicine, International St Mary's Hospital, Incheon, Korea,
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An SJ, Choi SI, Kang KN, Yoon SH, Kim YU. Optimal cut-off points of lumbar pedicle thickness as a morphological parameter to predict lumbar spinal stenosis syndrome: a retrospective study. J Pain Res 2018; 11:1709-1714. [PMID: 30233228 PMCID: PMC6129025 DOI: 10.2147/jpr.s168990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Purpose Lumbar spinal stenosis syndrome (LSSS) is induced by factors such as ligamentum flavum hypertrophy, facet joint hypertrophy and disc degeneration. However, the role of lumbar pedicle (LP) in LSSS has yet to be evaluated. We devised a new morphological parameter called the lumbar pedicle thickness (LPT) to evaluate the connection between LSSS and the LP. We hypothesized that the LPT is a major morphological parameter in the diagnosis of LSSS. Patients and methods The LPT data were collected from 136 patients diagnosed with LSSS. A total of 99 control subjects underwent lumbar spine magnetic resonance imaging (MRI) as part of a detailed medical assessment. Axial T2-weighted magnetic resonance (MR) images were acquired from all the participants. Using our picture archiving and communication system, we analyzed the thickness of the LP at the level of L5 vertebra on MRI. Results The average LPT was 9.46±1.81 mm in the control group and 13.26±1.98 mm in the LSSS group. LSSS patients showed a significantly greater LPT (P<0.001) than the control group. The receiver operating characteristic (ROC) curve analysis showed an optimal cutoff point of 11.33 mm for the LPT, with 83.8% sensitivity, 83.8% specificity and area under the curve of 0.92 (95% confidence interval [CI], 0.89-0.96). Conclusion A higher LPT was associated with a higher possibility of LSSS, suggesting its importance in the evaluation of patients with LSSS.
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Affiliation(s)
- Sang Joon An
- Department of Neurology, Catholic Kwandong University of Korea College of Medicine, International St. Mary's Hospital, Incheon, Republic of Korea
| | - Soo Il Choi
- Department of Anesthesiology and Pain Medicine, Catholic Kwandong University of Korea College of Medicine, International St. Mary's Hospital, Incheon, Republic of Korea,
| | - Keum Nae Kang
- Department of Anesthesiology and Pain Medicine, National Police Hospital, Seoul, Republic of Korea
| | - Syn-Hae Yoon
- Department of Anesthesiology and Pain Medicine, National Police Hospital, Seoul, Republic of Korea
| | - Young Uk Kim
- Department of Anesthesiology and Pain Medicine, Catholic Kwandong University of Korea College of Medicine, International St. Mary's Hospital, Incheon, Republic of Korea,
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Abstract
BACKGROUND AND OBJECTIVE Liposomal prostaglandin E1 (Lipo-PGE1) can inhibit platelet aggregation and vasodilatation and has been found to be therapeutic in ischemia and spinal diseases including stenosis. However, the neurologic safety of epidural administration of lipo-PGE1 requires further study. We investigated the neurotoxicity of epidurally administered lipo-PGE1 agonist in rats. METHODS Twenty-seven rats were randomly divided into three groups: Epidural isotonic sodium chloride solution administration (negative control, group N, n = 9); epidural lipo-PGE1 agonist (group L, n = 9); and epidural alcohol (positive control, group A, n = 9). A single 3-mL injection of lipo-PGE1 agonist (0.3 mL, 0.15 μg/kg), 40% ethanol, or isotonic sodium chloride solution was administered. Neurologic assessments were performed 3, 7, and 21 days after the injection. Histopathologic data were evaluated by one pathologist via light microscopy. RESULTS All rats in groups N and L, except one rat in group L, demonstrated normal response to neurologic assessments. Histopathologic findings showed no evidence of degenerative myelopathy, chromatolysis, or myelin loss in group N or L at any time point. However, all rats in group A revealed sensory and motor deficits as well as histopathologic abnormalities. CONCLUSION Liposomal prostaglandin E1 agonist did not cause any apparent neurologic abnormalities in the spinal cord or dorsal root ganglion, suggesting it is neurologically safe for epidural injection in this species. Additional mammalian study is warranted.
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Optimal Cut-Off Value of the Superior Articular Process Area as a Morphological Parameter to Predict Lumbar Foraminal Stenosis. Pain Res Manag 2017; 2017:7914836. [PMID: 28163566 PMCID: PMC5253487 DOI: 10.1155/2017/7914836] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 11/21/2016] [Indexed: 11/17/2022]
Abstract
Background. We devised a new morphological parameter called the superior articular process area (SAPA) to evaluate the connection between lumbar foraminal stenosis (LFS) and the superior articular process. Objective. We hypothesized that the SAPA is an important morphologic parameter in the diagnosis of LFS. Methods. All patients over 60 years of age were included. Data regarding the SAPA were collected from 137 patients with LFS. A total of 167 control subjects underwent lumbar magnetic resonance imaging (MRI) as part of a routine medical examination. We analyzed the cross-sectional area of the bone margin of the superior articular process at the level of L4-L5 facet joint in the axial plane. Results. The average SAPA was 96.3 ± 13.6 mm2 in the control group and 128.1 ± 17.2 mm2 in the LFS group. The LFS group was found to have significantly higher levels of SAPA (p < 0.001) in comparison to the control group. In the LFS group, the optimal cut-off value was 112.1 mm2, with 84.4% sensitivity, 83.9% specificity, and AUC of 0.94 (95% CI: 0.91-0.96). Conclusions. Higher SAPA values were associated with a higher possibility of LFS. These results are important in the evaluation of patients with LFS.
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Yu WJ, Chang CC, Kuo TF, Tsai TC, Chang SJ. Toona sinensis Roem leaf extracts improve antioxidant activity in the liver of rats under oxidative stress. Food Chem Toxicol 2012; 50:1860-5. [PMID: 22497899 DOI: 10.1016/j.fct.2012.03.068] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 03/09/2012] [Accepted: 03/23/2012] [Indexed: 02/06/2023]
Abstract
Toona sinensis Roem (TS) is an herbal plant widely cultivated in Asia. Recently, several antioxidant compounds in TS leaf (TSL) extracts were chemically identified including quercetin, gallic acid, and others. However, in vivo experiments regarding the antioxidative function of TSL are limited. In this study, Sprague Dawley (SD) rats with oxidative stress were successfully established by intraperitoneal injection of hydrogen peroxide (H(2)O(2)) (1mmol/kg BW) and fed with different TSL extracts for in vivo antioxidation evaluation. Among the TSLs tested in this study, TSL6 exhibited the best antioxidative effects which increased the enzyme activities of catalase, cupper/zinc superoxide dismutase (Cu/Zn SOD), glutathione peroxidase (GPx), glutathione reductase (GR), and Glutathione S transferase (GST) activities in liver compared to those in TSL-2 and TSL-2P groups. In conclusion, we provide the strong in vivo evidences for the first time that TSL extracts ameliorate the antioxidant enzymes (AOEs) activity in liver and is beneficial for the hepatic detoxification.
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Affiliation(s)
- Wen-Jen Yu
- Department of Biotechnology, Hung Kuang University, Taiwan
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Fan S, Chen HN, Wang CJ, Tseng WC, Hsu HK, Weng CF. Toona sinensis Roem (Meliaceae) leaf extract alleviates liver fibrosis via reducing TGFbeta1 and collagen. Food Chem Toxicol 2007; 45:2228-36. [PMID: 17629604 DOI: 10.1016/j.fct.2007.05.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2006] [Revised: 04/29/2007] [Accepted: 05/16/2007] [Indexed: 01/06/2023]
Abstract
Toona sinensis Roem (TS) leaf tea as a health food for the improvement of blood sugar and hypertension has been demonstrated. Thioacetamide (TAA), a hepatotoxin, causes the progression of liver fibrosis. In this study, we tested the effects of TS leaf on TAA-induced liver injury. TAA (200mg/kg Bwt/3 days, i.p.) treated rats were orally administrated with TS leaf extract (1g/kg Bwt/10 days) three times. After 30 days treatment, the morphological data showed that TS leaf extract given to TAA-treated rats had less liver fibrosis. The GOT/GPT, collagen 1 and collagen 3 mRNAs of livers in TAA-treated rats were elevated when compared to normal rats. The improvements of GOT/GPT, collagen 1 and collagen 3 mRNAs were shown in the TS leaf extract given to TAA-treated rats. TS leaf extract given to TAA-treated rats showed higher levels of cytochrome P450 (1A1, 2A and reductase) than those of TAA-treated rats. Compared to the TAA-treated group, TGFbeta1 mRNA (RT-PCR) was decreased with an increase of TGFbetaR1 protein (western blot) in the TS leaf extract given to TAA-treated rats. The decreased tendency of FGFR2 was found in the TS leaf extract given to TAA-treated rats. The result implies that TS leaf possesses beneficial effects on liver injury through increments of detoxification and the metabolic pathway.
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Affiliation(s)
- Sabrina Fan
- Institute of Biotechnology, National Dong Hwa University, Hualien 974, Taiwan
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