1.Potentiating effect and mechanism of extract of Jingfang Granules on activation of macrophages.
Dou-Dou HAO ; Zi-Han LU ; Yang-Gan LUO ; Peng-Fei TU ; Cheng-Hong SUN ; Jing-Chun YAO ; Qing WU ; Zhi-Xiang ZHU
China Journal of Chinese Materia Medica 2023;48(10):2803-2809
This study aimed to explore the potentiating effect and mechanism of the extract of Jingfang Granules(JFG) on the activation of macrophages. The RAW264.7 cells were treated with JFG extract and then stimulated by multiple agents. Subsequently, mRNA was extracted, and reverse transcription-polymerase chain reaction(RT-PCR) was used to measure the mRNA transcription of multiple cytokines in RAW264.7 cells. The levels of cytokines in the cell supernatant were detected by enzyme-linked immunosorbent assay(ELISA). In addition, the intracellular proteins were extracted and the activation of signaling pathways was determined by Western blot. The results showed that JFG extract alone could not promote or slightly promote the mRNA transcription of TNF-α, IL-6, IL-1β, MIP-1α, MCP-1, CCL5, IP-10, and IFN-β, and significantly enhance the mRNA transcription of these cytokines in RAW264.7 cells induced by R848 and CpG in a dose-dependent manner. Furthermore, JFG extract also potentiated the secretion of TNF-α, IL-6, MCP-1, and IFN-β by RAW264.7 cells stimulated with R848 and CpG. As revealed by mechanism analysis, JFG extract enhanced the phosphorylation of p38, ERK1/2, IRF3, STAT1, and STAT3 in RAW264.7 cells induced by CpG. The findings of this study indicate that JFG extract can selectively potentiate the activation of macrophages induced by R848 and CpG, which may be attributed to the promotion of the activation of MAPKs, IRF3, and STAT1/3 signaling pathways.
Tumor Necrosis Factor-alpha/metabolism*
;
Interleukin-6/metabolism*
;
Plant Extracts/metabolism*
;
Lipopolysaccharides/pharmacology*
;
Macrophages
;
Cytokines/metabolism*
;
RNA, Messenger/metabolism*
2.Blueberry attenuates liver injury in metabolic dysfunction-associated liver disease by promoting the expression of mitofilin/Mic60 in human hepatocytes and inhibiting the production of superoxide.
Ya REN ; Houmin FAN ; Lili ZHU ; Tao LIN ; Tingting REN
Chinese Journal of Cellular and Molecular Immunology 2023;39(4):318-324
Objective To study the effect and mechanism of blueberry on regulating the mitochondrial inner membrane protein mitofilin/Mic60 in an in vitro model of metabolic dysfunction-associated liver disease (MAFLD). Methods L02 human hepatocytes were induced by free fatty acids (FFA) to establish MAFLD cell model. A normal group, a model group, an 80 μg/mL blueberry treatment group, a Mic60 short hairpin RNA (Mic60 shRNA) transfection group, and Mic60 knockdown combined with an 80 μg/mL blueberry treatment group were established. The intracellular lipid deposition was observed by oil red O staining, and the effect of different concentrations of blueberry pulp on the survival rate of L02 cells treated with FFA was measured by MTT assay. The levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), triglyceride (TG), total cholesterol (TC), superoxide dismutase (SOD) activity, glutathione (GSH) and malondialdehyde (MDA) contents were measured by visible spectrophotometry. The expression of reactive oxygen species (ROS) in hepatocytes was observed by fluorescence microscopy, and the mRNA and protein expression of Mic60 were detected by real-time quantitative PCR and Western blot analysis, respectively. Results After 24 hours of FFA stimulation, a large number of red lipid droplets in the cytoplasm of L02 cells was observed, and the survival rate of L02 cells treated with 80 μg/mL blueberry was higher. The results of ALT, AST, TG, TC, MDA and the fluorescence intensity of ROS in blueberry treated group were lower than those in model group, while the levels of SOD, GSH, Mic60 mRNA and protein in blueberry treated group were higher than those in model group. Conclusion Blueberry promotes the expression of Mic60, increases the levels of SOD and GSH in hepatocytes, and reduces the production of ROS, thus alleviating the injury of MAFLD hepatocytes and regulating the disorder of lipid metabolism.
Humans
;
Blueberry Plants/chemistry*
;
Hepatocytes/metabolism*
;
Liver/metabolism*
;
Liver Diseases/metabolism*
;
Reactive Oxygen Species/metabolism*
;
Superoxide Dismutase/metabolism*
;
Superoxides/metabolism*
;
Mitochondrial Membranes/metabolism*
;
Mitochondrial Proteins/metabolism*
;
Plant Extracts/pharmacology*
3.Flavonoid-Rich Extract of Oldenlandia diffusa (Willd.) Roxb. Inhibits Gastric Cancer by Activation of Caspase-Dependent Mitochondrial Apoptosis.
Jia-Yin LING ; Qiu-Lan WANG ; Hao-Nan LIANG ; Qing-Bo LIU ; Dong-Hong YIN ; Li LIN
Chinese journal of integrative medicine 2023;29(3):213-223
OBJECTIVE:
To evaluate the apoptosis and cycle arrest effects of Oldenlandia diffusa flavonoids on human gastric cancer cells, determine the action mechanisms in association with the mitochondrial dependent signal transduction pathway that controls production of reactive oxygen species (ROS), and evaluate the pharmacodynamics of a mouse xenotransplantation model to provide a reference for the use of flavonoids in prevention and treatment of gastric cancer.
METHODS:
Flavonoids were extracted by an enzymatic-ultrasonic assisted method and purified with D-101 resin. Bioactive components were characterized by high-performance liquid chromatography. Cell lines MKN-45, AGS, and GES-1 were treated with different concentrations of flavonoids (64, 96, 128, 160 µg/mL). The effect of flavonoids on cell viability was evaluated by MTT method, and cell nuclear morphology was observed by Hoechst staining. The apoptosis rate and cell cycle phases were measured by flow cytometry, the production of ROS was detected by laser confocal microscope, the mitochondrial membrane potential (MMP) were observed by fluorescence microscope, and the expression of apoptotic proteins related to activation of mitochondrial pathway were measured by immunoblotting. MKN-45 cells were transplanted into BALB/c nude mice to establish a xenograft tumor model. Hematoxylin and eosin staining was used to reveal the subcutaneous tumor tissue. The tumor volume and tumor weight were measured, the expression levels of proliferation markers proliferating cell nuclear antigen (PCNA) and Ki-67 were detected by immunohistochemistry, and the expression levels of CA72-4 were measured by enzyme linked immunosorbent assay.
RESULTS:
Oldenlandia diffusa flavonoids inhibited proliferation of MKN-45 and AGS human gastric cancer cells, arrested the cell cycle in G1/S phase, induced accumulation of ROS in the process of apoptosis, and altered MMP. In addition, flavonoids increased Apaf-1, Cleaved-Caspase-3, and Bax, and decreased Cyclin A, Cdk2, Bcl-2, Pro-Caspase-9, and Mitochondrial Cytochrome C (P<0.05). The MKN-45 cell mouse xenotransplantation model further clarified the growth inhibitory effect of flavonoids towards tumors. The expression levels of PCNA and Ki-67 decreased in each flavonoid dose group, the expression level of CA72-4 decreased (P<0.05).
CONCLUSION
Flavonoids derived from Oldenlandia diffusa can inhibit proliferation and induce apoptosis of human gastric cancer cells by activating the mitochondrial controlled signal transduction pathway.
Humans
;
Animals
;
Mice
;
Oldenlandia/metabolism*
;
Proliferating Cell Nuclear Antigen
;
Stomach Neoplasms
;
Flavonoids/pharmacology*
;
Reactive Oxygen Species/metabolism*
;
Mice, Nude
;
Ki-67 Antigen
;
Cell Line, Tumor
;
Apoptosis
;
Plant Extracts/pharmacology*
;
Caspases
;
Cell Proliferation
4.The effects of different herbal compound and extracts from different extraction methods on hypoxia tolerance in mice.
Wan-Yu LI ; Hui-Ping MA ; Qu-Huan MA ; Xiao-Feng SHI ; Yan-Mei LU ; Peng-Peng ZHANG ; Jia-Xu ZHANG ; Xue-Feng DONG ; Qian-Nju YE
Chinese Journal of Applied Physiology 2022;38(3):199-204
Objective: To investigate the effects of different prescription compositions of traditional Chinese medicine and its different extraction methods of compound formula extracts on hypoxia tolerance in mice, in order to preferably select their prescription compositions and preparation extraction methods. Methods: Male BALB/c mice were randomly divided into 6 groups: blank control group, compound danshen group, compound Rhodiola Rosea alcohol-water extract group (Rhodiola rosea, Astragali Radix, Polygonati Rhizoma, Lycii Fructus), compound Rhodiola Rosea water extract group, compound Astragalus alcohol-water extract group (Astragali Radix, Polygonati Rhizoma, Lycii Fructus) and compound Astragalus water extract group, 30 mice in each group. Each group was administered continuously by gavage for 10 d. The blank group was gavaged with sterilized injection water. The mice in the other groups were treated with 0.15 g/kg of compound danshen, 3 g/kg of compound Rhodiola Rosea alcohol-water extract or water extract, and 1.7 g/kg of compound Astragalus alcohol-water extract or water extract, respectively. Each group was subjected to normobaric hypoxia tolerance test, sodium nitrite toxicity survival test and acute cerebral ischemia-hypoxia test 1 h after the last gavage, and the mice brain tissues were used to determine the activity of antioxidant enzymes and metabolites related to oxidative stress. Results: Compared with the blank control group, in normobaric hypoxia tolerance test, the survival time of mice in the compound danshen group and the compound Astragalus alcohol-water extract group and water extraction group was prolonged significantly (P<0.01), and the number of open-mouth gasping after cerebral ischemia and hypoxia was increased significantly (P<0.05). There was no statistical difference in survival time after sodium nitrite injection in each group. Compared with the blank control group, the activities of T-AOC, SOD, GSH and CAT were increased significantly (P<0.05, P<0.01) and the content of MDA was decreased significantly (P<0.01) in the compound Astragalus water extract group. Compared with the compound danshen group, the activities of SOD, CAT and GSH were increased significantly (P<0.01, P<0.05) and the content of MDA was decreased significantly (P<0.05). Conclusion: Compound Astragalus water extraction has the best effect of hypoxia tolerance, compound Rhodiola Rosea can eliminate Rhodiola rosea and consists of Astragali Radix, Polygonati Rhizoma, Lycii Fructus and its extraction method is water extraction.
Animals
;
Astragalus Plant
;
Ethanol
;
Hypoxia
;
Male
;
Mice
;
Plant Extracts/pharmacology*
;
Rhodiola
;
Sodium Nitrite
;
Superoxide Dismutase/metabolism*
;
Water
5.Effect of Rehmanniae Radix on depression-like behavior and hippocampal monoamine neurotransmitters of chronic unpredictable mild stress model rats.
Ping TIAN ; Wei ZHANG ; Kai-Yan LI ; Hong-Wei LI ; Kai MA ; De-En HAN
China Journal of Chinese Materia Medica 2022;47(17):4691-4697
To investigate the effect of Rehmanniae Radix on depression-like behavior and monoamine neurotransmitters of chronic unpredictable mild stress(CUMS) model rats. CUMS combined with isolated feeding was used to induce the depression model of rats. The depression-like behavior of rats was evaluated by sucrose preference test, open field test, and forced swim test. Hematoxylin-Eosin(HE) staining was used to investigate the pathological changes of neurons in the CA1 and CA3 area of hippocampus. Ultra performance liquid chromatography-tandem mass spectrometry(UPLC-MS) was used to detect the contents of 5-hydroxytryptamine(5-HT), 5-hydroxyindoleacetic acid(5-HIAA), dopamine(DA), 3,4-dihydroxyphenylacetic acid(DOPAC), homovanillic acid(HVA), norepinephrine(NE), and 3-methoxy-4-hydroxyphenyl glycol(MHPG) in rats. Western blot was used to detect the protein expressions of tryptophan hydroxylase 2(TPH2), serotonin transporter(SERT), and monoamine oxidase A(MAO-A) in the hippocampus of rats. Compared with the normal group, depressive-like behavior of rats was obvious in the model group. The arrangements of neurons in the CA1 and CA3 area of hippocampus were loose and disorderly. The levels of 5-HT, 5-HIAA, and 5-HT/5-HIAA in the hippocampal area were decreased(P<0.01). The protein expression of TPH2 was decreased(P<0.01), but those of SERT and MAO-A were increased(P<0.01). In the Rehmanniae Radix groups with 1.8 g·kg~(-1) and 7.2 g·kg~(-1), the depression-like behavior of CUMS rats and pathological changes of neurons in CA1, CA3 area of hippocampus were improved. The protein expression of TPH2(P<0.05, P<0.01) was increased, and those of SERT and MAO-A were down-regulated(P<0.05, P<0.01). The levels of 5-HT, 5-HIAA, and 5-HT/5-HIAA in hippocampus were increased(P<0.05, P<0.01). The changes in DA, DOPAC, HVA, DA/(DOPAC +HVA), NE, DHPG, and NE/DHPG were not statistically significant. The results suggested that Rehmanniae Radix improved depression-like behavior of CUMS rats, and the mechanism might be related to the regulation of synthesis, transportation, and metabolism of 5-HT neurotransmitter in the hippocampus.
3,4-Dihydroxyphenylacetic Acid/pharmacology*
;
Animals
;
Antidepressive Agents/therapeutic use*
;
Chromatography, Liquid
;
Depression/drug therapy*
;
Disease Models, Animal
;
Dopamine
;
Eosine Yellowish-(YS)/pharmacology*
;
Hematoxylin/pharmacology*
;
Hippocampus/metabolism*
;
Homovanillic Acid/pharmacology*
;
Hydroxyindoleacetic Acid/metabolism*
;
Methoxyhydroxyphenylglycol/pharmacology*
;
Monoamine Oxidase/metabolism*
;
Neurotransmitter Agents/metabolism*
;
Norepinephrine/pharmacology*
;
Plant Extracts
;
Rats
;
Rehmannia/chemistry*
;
Serotonin/metabolism*
;
Serotonin Plasma Membrane Transport Proteins/pharmacology*
;
Stress, Psychological/metabolism*
;
Tandem Mass Spectrometry
;
Tryptophan Hydroxylase/metabolism*
6.Potential pharmacodynamic substances of Laportea bulbifera in treatment of rheumatoid arthritis based on serum pharmacochemistry and pharmacology.
Juan TANG ; Qing ZHANG ; Dan WU ; Si-Ying CHEN ; Yi CHEN ; Yue-Ting LI ; Lin ZHENG ; Yong HUANG ; Yan-Yu LAN ; Yong-Lin WANG ; Zi-Peng GONG
China Journal of Chinese Materia Medica 2022;47(17):4755-4764
The present study investigated the pharmacodynamic material basis of Laportea bulbifera in the treatment of rheumatoid arthritis. Firstly, human rheumatoid arthritis fibroblast-like synoviocyte line MH7A was cultured in vitro and treated with tumor necrosis factor alpha(TNF-α, 50 ng·mL~(-1)). The proliferation and the levels of inflammatory cytokines such as prostaglandin E2(PGE2), interleukin-1β(IL-1β), and interleukin-6(IL-6) of the MH7A cells exposed to the serum containing L. bulbifera were determined to evaluate the anti-rheumatoid arthritis effects of the serum. Furthermore, the ultra-performance liquid chromatography tandem mass spectrometry fingerprints of the L. bulbifera crude extract, the drug-containing serum, and the drug-free serum were compared to identify the compounds newly generated in the serum after oral administration of the extract. According to the peak areas of common peaks and the results of anti-rheumatoid arthritis effect test, the active components were identified. The serum containing L. bulbifera significantly inhibited the proliferation of the MH7A cells activated by TNF-α and the expression of PGE2, IL-6, and IL-1β. Thirty newly generated compounds were detected in the drug-containing serum. Among them, neochlorogenic acid, cryptochlorogenic acid, chlorogenic acid, rutin, isoquercitrin, luteoloside, kaempferol-3-O-rutinoside, and quercitrin were also present in the crude extract. Twelve characteristic peaks(3, 7, 8, 14, 18, 19, 21, 23, 24, m6, m7, and m15) were significantly correlated with the pharmaceutical effect. According to the correlations, neochlorogenic acid, cryptochlorogenic acid, and chlorogenic acid had great contributions to the anti-rheumatoid arthritis activity. This study preliminarily clarified the potential pharmacodynamic substances of L. bulbifera in the treatment of rheumatoid arthritis, which laid a theoretical and experimental foundation for further development and application of the medicinal plant.
Animals
;
Arthritis, Experimental/drug therapy*
;
Arthritis, Rheumatoid/drug therapy*
;
Chlorogenic Acid/analogs & derivatives*
;
Cytokines/metabolism*
;
Dinoprostone
;
Humans
;
Interleukin-1beta/genetics*
;
Interleukin-6
;
Plant Extracts/therapeutic use*
;
Quinic Acid/analogs & derivatives*
;
Rutin
;
Tumor Necrosis Factor-alpha/metabolism*
;
Urticaceae/chemistry*
7.Activity of Codonopsis canescens against rheumatoid arthritis based on TLRs/MAPKs/NF-κB signaling pathways and its mechanism.
Yu-Jie WANG ; Xiao-Yu ZHONG ; Xin-Hong WANG ; Yuan-Han ZHONG ; Lin LIU ; Fang-Yuan LIU ; Jin-Xiang ZENG ; Ji-Xiao ZHU ; Xiao-Lang DU ; Min LI ; Gang REN ; Guo-Yue ZHONG ; Xiao-Min WANG
China Journal of Chinese Materia Medica 2022;47(22):6164-6174
This paper aims to explore the activity of Codonopsis canescens extract against rheumatoid arthritis(RA) based on the Toll-like receptors(TLRs)/mitogen-activated protein kinases(MAPKs)/nuclear factor kappa B(NF-κB) signaling pathways and its mechanism. The ultra-performance liquid chromatography-quadrupole time-of-flight/mass spectrometry(UPLC-Q-TOF-MS) was used to identify the components of C. canescens extract. Forty-eight male SD rats were randomly divided into six groups, namely the normal group, the model group, the methotrexate(MTX) tablet group, and the low, medium, and high-dose C. canescens extract(ZDS-L, ZDS-M, and ZDS-H) groups, with 8 rats in each group. The model of collagen-induced arthritis in rats was induced by injection of bovine type Ⅱ collagen emulsion. MTX(2.5 mg·kg~(-1)), ZDS-L, ZDS-M, and ZDS-H(0.3 g·kg~(-1), 0.6 g·kg~(-1), and 1.2 g·kg~(-1)) were administrated by gavage. Rats in the normal group and the model group received distilled water. MTX was given once every three days for 28 days, and the rest medicines were given once daily for 28 days. Body weight, degree of foot swelling, arthritis index, immune organ index, synovial histopathological changes, and serum levels of tumor necrosis factor-α(TNF-α), interleukin-1β(IL-1β), and interleukin-6(IL-6) were observed. Protein expressions of TLR2, TLR4, NF-κB p65, p38 MAPK, and p-p38 MAPK in rats were determined by Western blot. Thirty-four main components were identified by UPLC-Q-TOF-MS, including 15 flavonoids, 7 phenylpropanoids, 4 terpenoids, 4 organic acids, 2 esters, and 2 polyalkynes. As compared with the normal group, the body weight of the model group was significantly decreased(P<0.01), and foot swelling(P<0.05, P<0.01), arthritis index(P<0.01), and the immune organ index(P<0.01) were significantly increased. The synovial histopathological injury was obviously observed in the model group. The serum levels of inflammatory factors TNF-α, IL-1β, and IL-6 were significantly increased(P<0.01), and the protein expression levels of TLR2, TLR4, NF-κB p65, p-p38 MAPK/p38 MAPK in the synovial tissue were significantly increased(P<0.01) in the model group. As compared with the model group, the body weights of the ZDS dose groups were increased(P<0.01), and the degree of foot swelling(P<0.01) and the arthritis index were decreased(P<0.05, P<0.01). The immune organ index was decreased(P<0.01) in the ZDS dose groups, and the synovial tissue hyperplasia and inflammatory cell infiltration were alleviated. The serum levels of TNF-α, IL-1β, and IL-6 were significantly decreased(P<0.05, P<0.01), and the protein expression levels of TLR2, TLR4, NF-κB p65, p-p38 MAPK/p38 MAPK were decreased(P<0.05, P<0.01) in the ZDS dose groups. C. canescens extract containing apigenin, tricin, chlorogenic acid, aesculin, ferulic acid, caffeic acid, and oleanolic acid has a good anti-RA effect, and the mechanism may be related to the inhibition of TLRs/MAPKs/NF-κB signaling pathways.
Animals
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Cattle
;
Male
;
Rats
;
Arthritis, Experimental/drug therapy*
;
Arthritis, Rheumatoid/drug therapy*
;
Body Weight
;
Codonopsis/chemistry*
;
Interleukin-6/blood*
;
NF-kappa B/genetics*
;
p38 Mitogen-Activated Protein Kinases/metabolism*
;
Plant Extracts/therapeutic use*
;
Rats, Sprague-Dawley
;
Signal Transduction
;
Toll-Like Receptor 2/metabolism*
;
Toll-Like Receptor 4/metabolism*
;
Tumor Necrosis Factor-alpha/pharmacology*
8.Uptake and transport of Laportea bulbifera extract in Caco-2 cell model.
Jing HUANG ; Hong-Qin XIAO ; Ying LI ; Yi CHEN ; Si-Ying CHEN ; Yue-Ting LI ; Yong HUANG ; Lin ZHENG ; Yong-Lin WANG ; Zi-Peng GONG
China Journal of Chinese Materia Medica 2022;47(20):5617-5626
Laportea bulbifera extract is effective in resisting inflammation and shows a good therapeutic effect on rheumatoid arthritis in rats. However, the absorption characteristics of active components in L. bulbifera extract in Caco-2 cells are still unclear, which limits the in-depth development of L. bulbifera resources. The purpose of this study was to investigate the absorption and transport mechanism of the active components of L. bulbifera extract in the Caco-2 cell model and explore the effects of different factors(concentration, time, pH value, temperature, and efflux transporter inhibitor) on its uptake and transport. The results showed that L. bulbifera extract at the concentration of 2.0-8.0 mg·mL~(-1) showed no toxicity to Caco-2 cells. The uptake and transport of L. bulbifera extract in the Caco-2 cell model were concentration-dependent and time-dependent. The main absorption mechanism was passive diffusion, and acidic condition(pH 5.0-6.0) and 37 ℃ were more favorable for drug absorption. P_(app)>1.0×10~(-6 )cm·s~(-1) of each component indicated that L. bulbifera was a moderately absorbed drug. P-gp, MRP2, and BCRP were not involved in its uptake and transport.
Humans
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Rats
;
Animals
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Caco-2 Cells
;
ATP Binding Cassette Transporter, Subfamily G, Member 2/genetics*
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Intestinal Absorption
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Neoplasm Proteins/metabolism*
;
Urticaceae
;
Biological Transport
;
Plant Extracts/pharmacology*
9.Rumex acetosella Inhibits Platelet Function via Impaired MAPK and Phosphoinositide 3-Kinase Signaling.
Bo-Ra JEON ; Muhammad IRFAN ; Seung Eun LEE ; Jeong Hoon LEE ; Man Hee RHEE
Chinese journal of integrative medicine 2022;28(9):802-808
OBJECTIVE:
To examine the antiplatelet and antithrombotic activity of Rumex acetosella extract.
METHODS:
Standard light aggregometry was used for platelet aggregation, intracellular calcium mobilization assessed using Fura-2/AM, granule secretion (ATP release) by luminometer, and fibrinogen binding to integrin αIIbβ3 detected using flow cytometry. Western blotting is carried out to determine the phosphorylation of mitogen-activated protein kinase (MAPK) and phosphoinositide 3-kinase (PI3K)/Akt signaling.
RESULTS:
Rumex acetosella displayed the ability to inhibit platelet aggregation, calcium mobilization, granule secretion, and fibrinogen binding to integrin αIIbβ3. Rumex acetosella has also down-regulated MAPK and PI3K/Akt phosphorylation (all P<0.01).
CONCLUSION
Rumex acetosella extract exhibits antiplatelet activity via modulating GPVI signaling, and it may protect against the development of platelet-related cardiovascular diseases.
Blood Platelets/metabolism*
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Calcium/metabolism*
;
Fibrinogen/metabolism*
;
Mitogen-Activated Protein Kinases/metabolism*
;
Phosphatidylinositol 3-Kinase/pharmacology*
;
Phosphatidylinositol 3-Kinases/metabolism*
;
Phosphorylation
;
Plant Extracts/pharmacology*
;
Platelet Aggregation
;
Platelet Aggregation Inhibitors/pharmacology*
;
Platelet Glycoprotein GPIIb-IIIa Complex/pharmacology*
;
Proto-Oncogene Proteins c-akt/metabolism*
;
Rumex/metabolism*
10.Protective Effect of Fresh/Dry Dandelion Extracts on APAP-Overdose-Induced Acute Liver Injury.
Yao ZHENG ; Lei LEI ; Shuai LIANG ; Jiao AI ; Xin DENG ; Yan-Qiu LI ; Tian-Pei ZHANG ; Shi-Biao PU ; Yong-Shen REN
Chinese journal of integrative medicine 2022;28(8):683-692
OBJECITVIE:
To compare the liver protective activity of fresh/dried dandelion extracts against acetaminophen (APAP)-induced hepatotoxicity.
METHODS:
Totally 90 Kunming mice were randomly divided into 10 groups according to body weight (9 mice for each group). The mice in the normal control and model (vehicle control) groups were administered sodium carboxymethyl cellulose (CMC-Na, 0.5%) only. Administration groups were pretreated with high and low-dose dry dandelion extract (1,000 or 500 g fresh herb dried and then decocted into 120 mL solution, DDE-H and DDE-L); low-, medium- and high-dose dandelion juice (250, 500, 1,000 g/120 mL, DJ-L, DJ-M, and DJ-H); fresh dandelions evaporation juice water (120 mL, DEJW); dry dandelion extract dissolved by pure water (1 kg/120 mL, DDED-PW); dry dandelion extract dissolved by DEJW (120 g/120 mL, DDED-DEJW) by oral gavage for 7 days at the dosage of 0.5 mL solution/10 g body weight; after that, except normal control group, all other groups were intraperitonealy injected with 350 mg/kg APAP to induce liver injury. Twenty hours after APAP administration, serum and liver tissue were collected and serum alanine aminotransferase (AST), aspartate transaminase (ALT), alkaline phosphatase (AKP), malondialdehyde (MDA), glutathione (GSH), superoxide dismutase (SOD) activities were quantified by biochemical kits; tumor necrosis factor (TNF-α), interleukin (IL)-2, and IL-1 β contents in liver tissue were determined by enzyme linked immunosorbent assay kits. Histopathological changes in liver tissues were observed by hematoxylin and eosin staining; TUNEL Assay and Hoechst 33258 staining were applied for cell apoptosis evaluation. The expressions of heme oxygenase-1 (HO-1), nuclear factor erythroid-2-related factor 2 (Nrf-2), caspase-9, B-cell leukemia/lymphoma 2 (Bcl-2), Bax and p-JNK were determined by Western blot analysis.
RESULTS:
Pretreatment with fresh dandelion juice (FDJ, including DJ-L, DJ-M, DJ-H, DEJW and DDED-DEJW) significantly decreased the levels of serum ALT, AST, AKP, TNF-α and IL-1β compared with vehicle control group (P<0.05 or P<0.01). Additionally, compared with the vehicle control group, FDJ decreased the levels of hepatic MDA and restored GSH levels and SOD activity in livers (P<0.05 or P<0.01). FDJ inhibited the overexpression of pro-inflammatory factors including cyclooxygenase-2 and inducible nitric oxide synthase in the liver tissues (P<0.05 or P<0.01). Furthermore, Western blot analysis revealed that FDJ pretreatment inhibited activation of apoptotic signaling pathways via decreasing of Bax, and caspase-9 and JNK protein expression, and inhibited activation of JNK pathway (P<0.05 or P<0.01). Liver histopathological observation provided further evidence that FDJ pretreatment significantly inhibited APAP-induced hepatocyte necrosis, inflammatory cell infiltration and congestion.
CONCLUSIONS
FDJ pretreatment protects against APAP-induced hepatic injury by activating the Nrf-2/HO-1 pathway and inhibition of the intrinsic apoptosis pathway, and the effect of fresh dandelion extracts was superior to dried dandelion extracts in APAP hepatotoxicity model mice.
Acetaminophen/toxicity*
;
Alanine Transaminase
;
Animals
;
Apoptosis
;
Body Weight
;
Caspase 9/metabolism*
;
Chemical and Drug Induced Liver Injury/prevention & control*
;
Dichlorodiphenyl Dichloroethylene/pharmacology*
;
Glutathione/metabolism*
;
Liver
;
Mice
;
Oxidative Stress
;
Plant Extracts/therapeutic use*
;
Superoxide Dismutase/metabolism*
;
Taraxacum/metabolism*
;
Tumor Necrosis Factor-alpha/metabolism*
;
Water/metabolism*
;
bcl-2-Associated X Protein/metabolism*

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