1
|
Ma SH, Wu CY, Lyu YS, Chou YJ, Chang YT, Wu CY. Association between sodium-glucose co-transporter 2 inhibitors and risk of bullous pemphigoid in patients with type 2 diabetes: A nationwide population-based cohort study. J Eur Acad Dermatol Venereol 2022; 36:1318-1324. [PMID: 35344615 DOI: 10.1111/jdv.18106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/04/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Certain anti-diabetic agents have been linked to the development of bullous pemphigoid (BP). However, the relationship between BP and sodium-glucose co-transporter 2 inhibitors (SGLT2is) remains inconclusive. OBJECTIVE To investigate the association between SGLT2i usage and BP. METHODS Participants were recruited from the Taiwan National Health Insurance Database between 2007 and 2018. A total of 149,060 patients with diabetes receiving SGLT2i were matched 1:2 with diabetic patients without SGLT2i usage. Factors such as age, sex, duration of diabetes condition, DPP4i usage, insulin usage, and selected comorbidities were included in the multivariate analysis. RESULTS Compared with the control, the 2-year-cumulative incidence was significantly low in patients using SGLT2i after adjustment for competing mortality. Patients with diabetes receiving SGLT2i had a low risk (adjusted hazard ratio [HR] 0·56, 95% confidence interval [CI], 0·33-0·96) for BP after adjustment for potential confounders. Age (HR, 1·06), renal disease (HR, 1·79), cerebrovascular disease (HR, 3·23), epilepsy (HR, 3·07), DPP4i users (HR: 2·55), and insulin users (HR: 2·56) were significant risk factors for BP. CONCLUSIONS The risk of BP did not increase in patients receiving SGLT2i. Thus, SGLT2i could be a safe choice for patients with diabetes having additional risk factors or a history of BP.
Collapse
Affiliation(s)
- S H Ma
- Department of Dermatology, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - C Y Wu
- Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Institute of Biomedical Informatics, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Institute of Public Health and Department of Public Health, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Division of Translational Research and Center of Excellence for Cancer Research, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Public Health, China Medical University, Taichung, Taiwan
| | - Y S Lyu
- Institute of Biomedical Informatics, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Y J Chou
- Institute of Public Health and Department of Public Health, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Y T Chang
- Department of Dermatology, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Dermatology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - C Y Wu
- Department of Dermatology, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Institute of Public Health and Department of Public Health, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Dermatology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| |
Collapse
|
2
|
Hao MY, Sun LL, Sheng MW, Lyu YS, Lin YB, Yang YH, Zhi JH, Yu WL, Du HY. [Berberine alleviates programmed necrosis of metabolic-associated fatty liver disease via activating Nrf2 pathway in mice]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:224-229. [PMID: 35359076 DOI: 10.3760/cma.j.cn501113-20200910-00509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To investigate the effect of berberine on programmed necrosis of hepatocytes induced by metabolic-associated fatty liver disease (MAFLD) in mice and its related molecular mechanism. Methods: Twenty male C57BL/6N mice were randomly divided into four groups (n=5 in each group): control group (S), fatty liver group (H), berberine group(B), nuclear factor erythroid 2-related factor 2 inhibitor group (Nrf2), and all-trans-retinoic acid (ATRA) group (A). Serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), triglycerides (TG), total cholesterol (TC), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) concentrations were detected at the end of week 12 to calculate fatty liver index (liver mass/body mass ratio). Liver tissue was stained with HE, Masson and Oil Red O, and SAF score was used to evaluate the degree of liver injury. The expression levels of hepatic programmed necrosis-related proteins, namely receptor-interacting protein kinase 3 (RIPK3), phosphorylated mixed series protease-like domain (p-MLKL) and Nrf2 were detected by Western blot method. One-way ANOVA was used for intragroup comparisons and LSD-t tests were used for intergroup comparisons. Results: Compared with S group, H group serum ALT, AST, LDH, TG, TC, TNF-α, IL-1β levels and fatty liver index were significantly increased. The liver tissue was filled with vacuolar-like changes and inflammatory cell infiltration. Numerous red lipid droplets were observed with oil red O staining. Collagen fiber hyperplasia was evident with Masson staining. SAF scores (6.60 ± 0.55 and 0.80 ± 0.45) were significantly increased. The expressions of RIPK3 and p-MLKL were up-regulated. Nrf2 level was relatively increased, and the differences were statistically significant (P < 0.05). Compared with H group, berberine intervention group liver biochemical indexes, lipid levels, pro-inflammatory mediator expression, fatty liver index, and SAF score were significantly reduced, and the expression of RIPK3 and p-MLKL were down-regulated, while Nrf2 levels were further increased, and the differences were statistically significant (P<0.05). Compared with B group, treatment with Nrf2 inhibitor had antagonized the protective effect of berberine on fatty liver. Serum ALT, AST, LDH, TG, TC and TNF-α, IL-1β levels, fatty liver index, and SAF scores were significantly increased and the expressions of RIPK3 and p-MLKL were relatively increased, and the differences were statistically significant (P < 0.05). Conclusion: Berberine can significantly improve the metabolic-associated fatty liver disease injury in mice, and its mechanism is related to activation of Nrf2 and inhibition of programmed necrosis of hepatocytes.
Collapse
Affiliation(s)
- M Y Hao
- Tianjin First Central Hospital Clinic Institute, Tianjin Medical University, Tianjin 300192, China Hao Mingyue is working on the Department of Anesthesiology, Tianjin Eye Hospital, Tianjin 300020, China
| | - L L Sun
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China
| | - M W Sheng
- Department of Anesthesiology, Tianjin First Center Hospital, School of Medical, Nankai University, Tianjin 300192, China
| | - Y S Lyu
- Tianjin First Central Hospital Clinic Institute, Tianjin Medical University, Tianjin 300192, China
| | - Y B Lin
- Department of General Surgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
| | - Y H Yang
- Tianjin First Central Hospital Clinic Institute, Tianjin Medical University, Tianjin 300192, China
| | - J H Zhi
- Tianjin First Central Hospital Clinic Institute, Tianjin Medical University, Tianjin 300192, China
| | - W L Yu
- Department of Anesthesiology, Tianjin First Center Hospital, School of Medical, Nankai University, Tianjin 300192, China
| | - H Y Du
- Department of General Surgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
| |
Collapse
|
3
|
Chiou WC, Chen JC, Chen YT, Yang JM, Hwang LH, Lyu YS, Yang HY, Huang C. The inhibitory effects of PGG and EGCG against the SARS-CoV-2 3C-like protease. Biochem Biophys Res Commun 2021; 591:130-136. [PMID: 33454058 PMCID: PMC7787066 DOI: 10.1016/j.bbrc.2020.12.106] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 12/29/2020] [Indexed: 01/08/2023]
Abstract
The coronavirus disease (COVID-19) pandemic, resulting from human-to-human transmission of a novel severe acute respiratory syndrome coronavirus (SARS-CoV-2), has led to a global health crisis. Given that the 3 chymotrypsin-like protease (3CLpro) of SARS-CoV-2 plays an indispensable role in viral polyprotein processing, its successful inhibition halts viral replication and thus constrains virus spread. Therefore, developing an effective SARS-CoV-2 3CLpro inhibitor to treat COVID-19 is imperative. A fluorescence resonance energy transfer (FRET)-based method was used to assess the proteolytic activity of SARS-CoV-2 3CLpro using intramolecularly quenched fluorogenic peptide substrates corresponding to the cleavage sequence of SARS-CoV-2 3CLpro. Molecular modeling with GEMDOCK was used to simulate the molecular interactions between drugs and the binding pocket of SARS-CoV-2 3CLpro. This study revealed that the Vmax of SARS-CoV-2 3CLpro was about 2-fold higher than that of SARS-CoV 3CLpro. Interestingly, the proteolytic activity of SARS-CoV-2 3CLpro is slightly more efficient than that of SARS-CoV 3CLpro. Meanwhile, natural compounds PGG and EGCG showed remarkable inhibitory activity against SARS-CoV-2 3CLpro than against SARS-CoV 3CLpro. In molecular docking, PGG and EGCG strongly interacted with the substrate binding pocket of SARS-CoV-2 3CLpro, forming hydrogen bonds with multiple residues, including the catalytic residues C145 and H41. The activities of PGG and EGCG against SARS-CoV-2 3CLpro demonstrate their inhibition of viral protease activity and highlight their therapeutic potentials for treating SARS-CoV-2 infection.
Collapse
Affiliation(s)
- Wei-Chung Chiou
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Jui-Chieh Chen
- Department of Biochemical Science and Technology, National Chiayi University, Chiayi, Taiwan
| | - Yun-Ti Chen
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan
| | - Jinn-Moon Yang
- Institute of Bioinformatics and Systems Biology, National Chiao Tung University, Hsinchu, Taiwan; Department of Biological Science and Technology, College of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan; Center for Intelligent Drug Systems and Smart Bio-devices, National Chiao Tung University, Hsinchu, Taiwan; Faculty of Internal Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan; Hepatobiliary Division, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | - Lih-Hwa Hwang
- Institute of Microbiology and Immunology, National Yang-Ming University, Taipei, Taiwan
| | - Yi-Shuan Lyu
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Hsin-Yi Yang
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Cheng Huang
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei, Taiwan.
| |
Collapse
|
4
|
Kim HM, Shin HY, Lee SP, Ryu ST, Shin TY, Chae HJ, Kim HR, Lyu YS, Lim KS. Inhibition of tumour necrosis factor-alpha secretion from rat astrocytes by Sesim-Tang. Phytother Res 2002; 16:28-32. [PMID: 11807961 DOI: 10.1002/ptr.787] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Substance P (SP) can stimulate secretion of tumour necrosis factor-alpha (TNF-alpha) from astrocytes stimulated with lipopolysaccharide (LPS). In this study, we have examined whether an aqueous extract of Sesim-Tang inhibits the secretion of TNF-alpha from primary cultures of rat astrocytes. Sesim-Tang (10-1000 microg/mL) significantly inhibited the TNF-alpha secretion by astrocytes stimulated with LPS and SP. Interleukin-1 (IL-1) has been shown to elevate TNF-alpha secretion from LPS-stimulated astrocytes while having no effect on astrocytes in the absence of LPS. We therefore examined whether IL-1 mediated inhibition of TNF-alpha secretion from primary astrocytes by Sesim-Tang. Treatment with Sesim-Tang (10-1000 microg/mL) of astrocytes stimulated with both LPS and SP decreased IL-1 secretion significantly. Moreover, the secretion of TNF-alpha by LPS and SP in astrocytes was progressively inhibited with increasing amounts of IL-1 neutralizing antibody. Our results suggest that Sesim-Tang may inhibit TNF-alpha secretion by inhibiting IL-1 secretion and that Sesim-Tang has an antiinflammatory activity in the central nervous system.
Collapse
Affiliation(s)
- H M Kim
- Department of Oriental Pharmacy, College of Pharmacy, Center of Oriental Medicinal Science, Wonkwang University, Iksan, Chonbuk 570-749.
| | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Na HJ, Koo HN, Lee GG, Yoo SJ, Park JH, Lyu YS, Kim HM. Juniper oil inhibits the heat shock-induced apoptosis via preventing the caspase-3 activation in human astrocytes CCF-STTG1 cells. Clin Chim Acta 2001; 314:215-20. [PMID: 11718698 DOI: 10.1016/s0009-8981(01)00699-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Brain astrocytes play a pivotal role in neuronal activities. METHODS An investigation was undertaken to determine whether juniper oil inhibits heat shock-induced apoptosis of astrocytes. RESULTS Juniper oil inhibited the heat shock-induced apoptosis in human astrocyte CCF-STTG1 cells. Pretreatment of the cells with juniper oil inhibited the heat shock-induced DNA fragmentation and condensation of nuclear chromatin. Juniper oil alone did not affect the apoptosis. Juniper oil inhibited the heat shock-induced caspase-3 activation and poly-ADP-ribose polymerase (PARP) fragmentation in the human astrocytes. CONCLUSIONS Juniper oil may inhibit the apoptosis of astrocytes by preventing the caspase-3 activation.
Collapse
Affiliation(s)
- H J Na
- Department of Oriental Pharmacy, College of Pharmacy, and Korea Institute of Oriental Pharmacy, Wonkwang University, Iksan, Chonbuk 570-749, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|
6
|
Koo HN, Jeong HJ, Kim CH, Park ST, Lee SJ, Seong KK, Lee SK, Lyu YS, Kim HM. Inhibition of heat shock-induced apoptosis by peppermint oil in astrocytes. J Mol Neurosci 2001; 17:391-6. [PMID: 11859935 DOI: 10.1385/jmn:17:3:391] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Exposure to environmental stresses and toxins is linked to the pathogenesis of neuropsychiatric disorders. Astrocytes, the most abundant glial-cell type in the brain, are considered to have physiological and pathological roles in neuronal activities. We have investigated whether peppermint oil inhibits heat shock-induced apoptosis of astrocytes. We found that peppermint oil inhibits the heat shock-induced apoptosis in both human astrocyte CCF-STTG1 cells and rat astrocytes. Pretreatment of the cells with peppermint oil inhibited the heat shock-induced DNA fragmentation and condensation of nuclear chromatin. Peppermint oil also inhibited the caspase-3 activation and poly-ADP-ribose polymerase fragmentation in CCF-STTG1 cells. These results suggest that peppermint oil may modulate the apoptosis of astrocytes via the activation of the caspase-3.
Collapse
Affiliation(s)
- H N Koo
- College of Pharmacy and Center of Oriental Medicinal Science, Wonkwang University, Iksan, Chonbuk, Republic of Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Um JY, Chung HS, Kim MS, Na HJ, Kwon HJ, Kim JJ, Lee KM, Lee SJ, Lim JP, Do KR, Hwang WJ, Lyu YS, An NH, Kim HM. Molecular authentication of Panax ginseng species by RAPD analysis and PCR-RFLP. Biol Pharm Bull 2001; 24:872-5. [PMID: 11510476 DOI: 10.1248/bpb.24.872] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In order to develop convenient and reproducible methods for the identification of ginseng drugs at a DNA level, randomly amplified polymorphic DNA (RAPD) and PCR-restriction fragment length polymorphism (PCR-RFLP) analyses were applied within Panax species. To authenticate Panax ginseng among ginseng populations, RAPD analysis was carried out using a 20 mer-random primer. The similarity coefficients among the DNA of ginseng plants analyzed were low, ranging from 0.197 to 0.491. In addition, by using PCR-RFLP analysis, very different fingerprints were obtained within Korean ginseng plants. These results suggest that these methods are able to authenticate the concerned Panax species. Broader application of this approach to authenticate other morphologically similar medicinal materials is rationalized.
Collapse
Affiliation(s)
- J Y Um
- College of Pharmacy, Wonkwang University, Iksan, Chonbuk, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Kim HM, Shin HY, Lim KH, Ryu ST, Shin TY, Chae HJ, Kim HR, Lyu YS, An NH, Lim KS. Taraxacum officinale inhibits tumor necrosis factor-alpha production from rat astrocytes. Immunopharmacol Immunotoxicol 2000; 22:519-30. [PMID: 10946829 DOI: 10.3109/08923970009026009] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Substance P (SP) can stimulate production of tumor necrosis factor-alpha (TNF-alpha) from astrocytes stimulated with lipopolysaccharide (LPS). The objective of the current study was to determine the effect of Taraxacum officinale (TO) on the production of TNF-alpha from primary cultures of rat astrocytes. TO (100 and 1000 microg/ml) significantly inhibited the TNF-alpha production by astrocytes stimulated with LPS and SP. Interleukin-1 (IL-1) has been shown to elevate TNF-alpha production from LPS-stimulated astrocytes while having no effect on astrocytes in the absence of LPS. We therefore examined whether IL-1 mediated inhibition of TNF-alpha production from primary astrocytes by TO. Treatment of TO (100 and 1000 microg/ml) to astrocytes stimulated with both LPS and SP decreased IL-1 production significantly. Moreover, the production of TNF-alpha by LPS and SP in astrocytes was progressively inhibited with increasing amount of IL-1 neutralizing antibody. Our results suggest that TO may inhibit TNF-alpha production by inhibiting IL-1 production and that TO has an antiinflammatory activity in the central nervous system.
Collapse
Affiliation(s)
- H M Kim
- College of Pharmacy, Center of Oriental Medicinal Science, Wonkwang University, Iksan, Chonbuk, South Korea.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Abstract
We hypothesize that the accumulation of tetrodotoxin (TTX) sensitive sodium channels in injured dorsal root ganglion (DRG) neurons plays a critically important role in the generation of ectopic discharges and mechanical allodynia after peripheral nerve injury. Using the segmental spinal nerve (L5) ligation model of neuropathic pain, this hypothesis was tested by examining the effect of TTX on the mechanical sensitivity of the affected hind paw. Various concentrations of TTX were applied topically to the L5 DRG by using chronically implanted polyethylene tubing. The data showed that application of TTX at low doses (12.5-50 nM), which are far less than those needed for blocking action potential conduction, produced a significant elevation of mechanical threshold in the paw for foot withdrawals, a sign of reduced allodynic behaviors. The data suggest that TTX-sensitive subtypes of sodium channels play an important role in maintaining allodynic behaviors in an animal model of neuropathic pain.
Collapse
Affiliation(s)
- Y S Lyu
- Marine Biomedical Institute, University of Texas Medical Branch, 77555-1069, Galveston, TX, USA
| | | | | | | |
Collapse
|
10
|
Abstract
We examined the effect of Solanum lyratum Thunb. (Solanaceae) (SL) on the production of nitric oxide (NO). Stimulation of mouse peritoneal macrophages with SL after the treatment of recombinant interferon-gamma (rIFN-gamma) resulted in increased NO synthesis. SL had no effect on NO synthesis by itself. When SL was used in combination with rIFN-gamma, there was a marked cooperative induction of NO synthesis in a dose-dependent manner. The optimal effect of SL on NO synthesis was shown 6 h after treatment with rIFN-gamma. The increased production of NO from rIFN-gamma plus SL-stimulated cells was decreased by the treatment with staurosporin. In addition, synergy between rIFN-gamma and SL was mainly dependent on SL-induced tumor necrosis factor-alpha (TNF-alpha) secretion. All the preparations of SL were endotoxin free. The present results indicate that the capacity of SL to increase NO production from rIFN-gamma-primed mouse peritoneal macrophages is the result of SL-induced TNF-alpha secretion via the signal transduction pathway of PKC activation.
Collapse
Affiliation(s)
- H M Kim
- College of Pharmacy, Wonkwang University, Iksan, Chonbuk, South Korea.
| | | | | | | | | | | |
Collapse
|
11
|
Kim HM, Lee YJ, Lyu YS. Inhibition of lipopolysaccharide plus substance P-induced tumor necrosis factor-alpha production from astrocytes by Chongmyung-Tang. J Ethnopharmacol 1999; 66:295-300. [PMID: 10473176 DOI: 10.1016/s0378-8741(99)00021-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Astrocytes have the capacity to secrete or respond to a variety of cytokines. In this study, we have examined whether an aqueous extract of Chongmyung-Tang (CmT) inhibits production of tumor necrosis factor-alpha (TNF-alpha) from primary cultures of mouse astrocytes. CmT (1 and 10 microg/ml) significantly inhibited the TNF-alpha production by astrocytes stimulated with lipopolysaccharide (LPS) and substance P (SP). Interleukin-1 (IL-1) has been shown to elevate TNF-alpha production from LPS-stimulated astrocytes while having no effect on astrocytes in the absence of LPS. We therefore examined whether IL-1 mediated inhibition of TNF-alpha production from primary astrocytes by CmT. Treatment of CmT (1 and 10 microg/ml) to astrocytes stimulated with both LPS and SP decreased IL-1 production significantly. In addition, reverse-transcribed polymerase chain reaction analysis demonstrated that significantly reduced level of the TNF-alpha mRNA was expressed in astrocytes treated with CmT. Our results suggest that CmT inhibits TNF-alpha production by reducing TNF-alpha mRNA expression.
Collapse
Affiliation(s)
- H M Kim
- Department of Oriental Pharmacy, College of Pharmacy, Wonkwang University, Iksan, Chonbuk, South Korea.
| | | | | |
Collapse
|
12
|
Kim HM, Kim HW, Lyu YS, Won JH, Kim DK, Lee YM, Morii E, Jippo T, Kitamura Y, An NH. Inhibitory effect of mast cell-mediated immediate-type allergic reactions by Cichorium intybus. Pharmacol Res 1999; 40:61-5. [PMID: 10378992 DOI: 10.1006/phrs.1999.0474] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the effect of an aqueous extract of Cichorium intybus (CIAE) on mast cell-mediated immediate type allergic reactions. CIAE (0.1-1000 mg kg-1) dose-dependently inhibited systemic anaphylactic reaction induced by compound 48/80 in mice. Especially, CIAE inhibited compound 48/80-induced anaphylactic reaction 100% with the dose of 1000 mg kg-1. CIAE 1000 mg kg-1also significantly inhibited local anaphylactic reaction activated by anti-dinitrophenyl (DNP) IgE. When mice were pretreated with CIAE at a concentration ranging from 0.1 to 1000 mg kg-1, the plasma histamine levels were reduced in a dose-dependent manner. CIAE (1-1000 microg ml-1) dose-dependently inhibited histamine release from the rat peritoneal mast cells (RPMC) activated by compound 48/80 or anti-DNP IgE. The level of cAMP in RPMC, when CIAE (1000 microg ml-1) was added, increased significantly compared with that of control cells. These results indicate that CIAE inhibits mast cell-mediated immediate-type allergic reactions in vivo and in vitro.
Collapse
Affiliation(s)
- H M Kim
- College of Pharmacy, Wonkwang University, Iksan, Chonbuk, 570-749, South Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Kim HM, Lee EH, Na HJ, Lee SB, Shin TY, Lyu YS, Kim NS, Nomura S. Effect of Polygala tenuifolia root extract on the tumor necrosis factor-alpha secretion from mouse astrocytes. J Ethnopharmacol 1998; 61:201-208. [PMID: 9705011 DOI: 10.1016/s0378-8741(98)00040-3] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We investigated whether an aqueous extract of Polygala tenuifolia root (PTAE) inhibits secretion of tumor necrosis factor-alpha (TNF-alpha) from primary cultures of mouse astrocytes. PTAE dose-dependently inhibited the TNF-alpha secretion by astrocytes stimulated with substance P (SP) and lipopolysaccharide (LPS). Interleukin-1 (IL-1) has been shown to elevate TNF-alpha secretion from LPS-stimulated astrocytes while having no effect on astrocytes in the absence of LPS. We therefore also investigated whether IL-1 mediated inhibition of TNF-alpha secretion from primary astrocytes by PTAE. Treatment of PTAE to astrocytes stimulated with both LPS and SP decreased IL-1 secretion to the level observed with LPS alone. Moreover, incubation of astrocytes with IL-1 antibody abolished the synergistic co-operative effect of LPS and SP. These results suggest that PTAE may inhibit TNF-alpha secretion by inhibiting IL-1 secretion and that PTAE has an anti-inflammatory activity on the central nervous system curing some pathological disease states.
Collapse
Affiliation(s)
- H M Kim
- Department of Oriental Pharmacy, College of Pharmacy, Wonkwang University, Iksan, Chonbuk, South Korea
| | | | | | | | | | | | | | | |
Collapse
|