1.Potentilla anserina polysaccharide alleviates cadmium-induced oxidative stress and apoptosis of H9c2 cells by regulating the MG53-mediated RISK pathway.
Lixia ZHAO ; Ju CHENG ; Di LIU ; Hongxia GONG ; Decheng BAI ; Wei SUN
Chinese Journal of Natural Medicines (English Ed.) 2023;21(4):279-291
Oxidative stress plays a crucial role in cadmium (Cd)-induced myocardial injury. Mitsugumin 53 (MG53) and its mediated reperfusion injury salvage kinase (RISK) pathway have been demonstrated to be closely related to myocardial oxidative damage. Potentilla anserina L. polysaccharide (PAP) is a polysaccharide with antioxidant capacity, which exerts protective effect on Cd-induced damage. However, it remains unknown whether PAP can prevent and treat Cd-induced cardiomyocyte damages. The present study was desgined to explore the effect of PAP on Cd-induced damage in H9c2 cells based on MG53 and the mediated RISK pathway. For in vitro evaluation, cell viability and apoptosis rate were analyzed by CCK-8 assay and flow cytometry, respectively. Furthermore, oxidative stress was assessed by 2',7'-dichlorodihydrofluorescein diacetate (DCFH-DA) staining and using superoxide dismutase (SOD), catalase (CAT), and glutathione/oxidized glutathione (GSH/GSSG) kits. The mitochondrial function was measured by JC-10 staining and ATP detection assay. Western blot was performed to detect the expression of proteins related to MG53, the RISK pathway, and apoptosis. The results indicated that Cd increased the levels of reactive oxygen species (ROS) in H9c2 cells. Cd decreased the activities of SOD and CAT and the ratio of GSH/GSSG, resulting in decreases in cell viability and increases in apoptosis. Interestingly, PAP reversed Cd-induced oxidative stress and cell apoptosis. Meanwhile, Cd reduced the expression of MG53 in H9c2 cells and inhibited the RISK pathway, which was mediated by decreasing the ratio of p-AktSer473/Akt, p-GSK3βSer9/GSK3β and p-ERK1/2/ERK1/2. In addition, Cd impaired mitochondrial function, which involved a reduction in ATP content and mitochondrial membrane potential (MMP), and an increase in the ratio of Bax/Bcl-2, cytoplasmic cytochrome c/mitochondrial cytochrome c, and Cleaved-Caspase 3/Pro-Caspase 3. Importantly, PAP alleviated Cd-induced MG53 reduction, activated the RISK pathway, and reduced mitochondrial damage. Interestingly, knockdown of MG53 or inhibition of the RISK pathway attenuated the protective effect of PAP in Cd-induced H9c2 cells. In sum, PAP reduces Cd-induced damage in H9c2 cells, which is mediated by increasing MG53 expression and activating the RISK pathway.
Cadmium/metabolism*
;
Caspase 3/metabolism*
;
Potentilla/metabolism*
;
Glycogen Synthase Kinase 3 beta/pharmacology*
;
Proto-Oncogene Proteins c-akt/metabolism*
;
Cytochromes c/metabolism*
;
Glutathione Disulfide/pharmacology*
;
Oxidative Stress
;
Myocytes, Cardiac
;
Reactive Oxygen Species/metabolism*
;
Reperfusion Injury/metabolism*
;
Apoptosis
;
Polysaccharides/pharmacology*
;
Adenosine Triphosphate/metabolism*
2.Effects of arsenic and its main metabolites on A549 cell apoptosis and the expression of pro-apoptotic genes Bad and Bik.
Qian ZHOU ; Jin Yao YIN ; Jing Wen TAN ; Shu Ting LI ; Cheng Lan JIANG ; Yue Feng HE
Chinese Journal of Industrial Hygiene and Occupational Diseases 2022;40(9):661-667
Objective: To investigate the effect of arsenic and its main metabolites on the apoptosis of human lung adenocarcinoma cell line A549 and the expression of pro-apoptotic genes Bad and Bik. Methods: In October 2020, A549 cells were recovered and cultured, and the cell viability was detected by the cell counting reagent CCK-8 to determine the concentration and time of sodium arsenite exposure to A549. The study was divided into NaAsO(2) exposure groups and metobol: le expoure groups: the metabolite comparison groups were subdivided into the control group, the monomethylarsinic acid exposure group (60 μmol/L) , and the dimethylarsinic acid exposure group (60 μmol/L) ; sodium arsenite dose groups were subdivided into 4 groups: control group (0) , 20, 40, 60 μmol/L sodium arsenite NaAsO(2). Hoechst 33342/propidium iodide double staining (Ho/PI) was used to observe cell apoptosis and real-time quantitative polymerase chain reaction (qRT-PCR) was used to detect the expression levels of Bad and Bik mRNA in cells after exposure. Western blotting was used to detect the protein expressions of Bad, P-Bad-S112, Bik, cleaved Bik and downstream proteins poly ADP-ribose polymerase PARP1 and cytochrome C (Cyt-C) , using spectrophotometry to detect the activity changes of caspase 3, 6, 8, 9. Results: Compared with the control group, the proportion of apoptotic cells in the 20, 40, and 60 μmol/L NaAsO(2) dose groups increased significantly (P<0.01) , and the expression levels of Bad, Bik mRNA, the protein expression levels of Bad, P-Bad-S112, Bik, cleaved Bik, PARP1, Cyt-C were increased (all P<0.05) , and the activities of Caspase 3, 6, 8, and 9 were significantly increased with significantly differences (P<0.05) . Compared with the control group, the expression level of Bad mRNA in the DMA exposure group (1.439±0.173) was increased with a significant difference (P=0.024) , but there was no significant difference in the expression level of Bik mRNA (P=0.788) . There was no significant differences in the expression levels of Bad and Bik mRNA in the poison groups (P=0.085, 0.063) . Compared with the control group, the gray values of proteins Bad, Bik, PARP1 and Cyt-C exposed to MMA were 0.696±0.023, 0.707±0.014, 0.907±0.031, 1.032±0.016, and there was no significant difference between the two groups (P=0.469, 0.669, 0.859, 0.771) ; the gray values of proteins Bad, Bik, PARP1 and Cyt-C exposed to DMA were 0.698±0.030, 0.705±0.022, 0.908±0.015, 1.029±0.010, and there was no difference between the two groups (P=0.479, 0.636, 0.803, 0.984) . Conclusion: Sodium arsenite induces the overexpression of Bad and Bik proteins, initiates the negative feedback regulation of phosphorylated Bad and the degradation of Bik, activates the downstream proteins PARP1, Cyt-C and Caspase pathways, and mediates the apoptosis of A549 cells.
A549 Cells
;
Adenosine Diphosphate Ribose/pharmacology*
;
Apoptosis
;
Apoptosis Regulatory Proteins
;
Arsenic
;
Arsenites
;
Cacodylic Acid/pharmacology*
;
Caspase 3
;
Caspases/pharmacology*
;
Cytochromes c/pharmacology*
;
Humans
;
Mitochondrial Proteins/pharmacology*
;
Poisons
;
Propidium/pharmacology*
;
RNA, Messenger
;
Sincalide/pharmacology*
;
Sodium Compounds
;
bcl-Associated Death Protein/metabolism*
3.Effect of ethanol extract of Gastrodiae Rhizoma on mitochondrial dysfunction in cerebral ischemia-reperfusion injury.
Yuan LUO ; Pu CHEN ; Li-Ping YANG ; Xiao-Hua DUAN
China Journal of Chinese Materia Medica 2022;47(20):5564-5573
This study observed the effects of ethanol extract of Gastrodiae Rhizoma(GE) on multiple aspects of mitochondrial dysfunction by investigating the mitochondria isolated from rat brains subjected to focal middle cerebral artery occlusion/reperfusion(MCAO/R). SD rats were randomly divided into a sham operation group(Sham), a model group(MCAO/R), low-and high-dose ethanol extract of GE groups(262.3 and 524.6 mg·kg~(-1)), and a nimodipine group(Nim, 15 mg·kg~(-1)). After continuous intragastric administration for 7 days, the MCAO/R model was induced in rats by the suture method. The neurological function and percentage of cerebral infarction volume were measured 24 h after reperfusion, and mitochondrial ultrastructure was observed under an electron microscope. Mitochondria were separated by gradient centrifugation and detected for reactive oxygen species(ROS), malondialdehyde(MDA), respiratory chain enzyme complex Ⅰ-Ⅳ activity, mitochondrial permeability transition pore(mPTP), mitochondrial membrane potential(MMP), and mitochondrial adenosine triphosphate(ATP) content. Enzyme-linked immunosorbent assay(ELISA) was used to detect the expression of cytochrome C(Cyt C) in different sites. TUNEL staining was used to observe the apoptosis of brain tissues in each group, and Western blot was used to detect the expression of B-cell lymphoma 2(Bcl-2) and Bcl-2-associated X protein(Bax) in brain tissues. The experimental results revealed that compared with the Sham group, the MCAO/R group showed evident neurological dysfunction and cerebral infarction(P<0.01) accompanied by mitochondrial swelling and crest disappearance, increased ROS level and MDA content, inhibited activity of respiratory chain enzyme complex Ⅰ-Ⅳ, abnormal opening of mPTP, and reduced MMP and mitochondrial ATP(P<0.01). Besides, many Cyt C was released from mitochondria into the cytoplasm to induce apoptosis(P<0.01). The ethanol extract of GE positively affected the behavior deficit and mitochondrial health of MCAO/R rats, with the manifestations of decreased production of ROS and MDA(P<0.01), potentiated activity of mitochondrial respiratory chain enzyme complex Ⅰ-Ⅳ, and restored the level of mPTP(P<0.05). In addition, the ethanol extract of GE reduced the loss of MMP and the escape of Cyt C to the cytoplasm(P<0.05), reduced the number of TUNEL positive cells(P<0.01) accompanied by the decrease in Bax and the up-regulation of Bcl-2(P<0.01), and increased the level of ATP(P<0.01). In conclusion, GE ethanol extract has a protective effect against MCAO/R-induced mitochondrial dysfunction, and the mechanism may be related to the regulation of oxidative stress, maintenance of functional morphology of mitochondria, and inhibition of endogenous apoptosis.
Animals
;
Rats
;
bcl-2-Associated X Protein/metabolism*
;
Reactive Oxygen Species/metabolism*
;
Ethanol
;
1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine/pharmacology*
;
Neuroprotective Agents/pharmacology*
;
Rats, Sprague-Dawley
;
Reperfusion Injury/metabolism*
;
Infarction, Middle Cerebral Artery
;
Mitochondria
;
Proto-Oncogene Proteins c-bcl-2/metabolism*
;
Apoptosis
;
Cytochromes c/metabolism*
;
Adenosine Triphosphate/pharmacology*
4.Role of mitochondrial permeability transition pore in mediating the inhibitory effect of gastrodin on oxidative stress in cardiac myocytes .
Xuechao HAN ; Jingman XU ; Sen XU ; Yahan SUN ; Mali HE ; Xiaodong LI ; Xinyu LI ; Jiayi PI ; Rui YU ; Wei TIAN
Journal of Southern Medical University 2018;38(11):1306-1311
OBJECTIVE:
To explore the role of mitochondrial permeability transition pore (mPTP) in mediating the protective effect of gastrodin against oxidative stress damage in H9c2 cardiac myocytes.
METHODS:
H9c2 cardiac myocytes were treated with HO, gastrodin, gastrodin+HO, cyclosporin A (CsA), or CsA+gas+HO group. MTT assay was used to detect the survival ratio of H9c2 cells, and flow cytometry with Annexin V-FITC/PI double staining was used to analyze the early apoptosis rate after the treatments. The concentration of ATP and level of reactive oxygen species (ROS) in the cells were detected using commercial kits. The mitochondrial membrane potential of the cells was detected with laser confocal microscopy. The expression of cytochrome C was detected with Western blotting, and the activity of caspase-3 was also assessed in the cells.
RESULTS:
Gastrodin pretreatment could prevent oxidative stress-induced reduction of mitochondrial membrane potential, and this effect was inhibited by the application of CsA. Gastrodin significantly lowered the levels of ROS and apoptosis-related factors in HO-exposed cells, and such effects were reversed by CsA. CsA significantly antagonized the protective effect of gastrodin against apoptosis in HO-exposed cells.
CONCLUSIONS
Gastrodin prevents oxidative stress-induced injury in H9c2 cells by inhibiting mPTP opening to reduce the cell apoptosis.
Adenosine Triphosphate
;
analysis
;
Apoptosis
;
drug effects
;
Benzyl Alcohols
;
antagonists & inhibitors
;
pharmacology
;
Caspase 3
;
analysis
;
Cell Line
;
Cell Survival
;
drug effects
;
Cyclosporine
;
pharmacology
;
Cytochromes c
;
analysis
;
Glucosides
;
antagonists & inhibitors
;
pharmacology
;
Humans
;
Hydrogen Peroxide
;
antagonists & inhibitors
;
pharmacology
;
Membrane Potential, Mitochondrial
;
drug effects
;
Mitochondrial Membrane Transport Proteins
;
physiology
;
Myocytes, Cardiac
;
drug effects
;
metabolism
;
Oxidative Stress
;
Reactive Oxygen Species
;
analysis
5.Protective Effect of Ozone against Hemiscorpius lepturus Envenomation in Mice.
Parvaneh NASERZADEH ; Farshad SHAHI ; Delavar SHAHBAZZADEH ; Mostafa GHANEI ; Khadijeh ASHTARI ; Yoones PANAHI ; Mir-Jamal HOSSEINI ; Morteza IZADI ;
Biomedical and Environmental Sciences 2017;30(8):581-590
OBJECTIVEScorpion (Hemiscorpius lepturus) stings are a public health concern in Iran, particularly in south and southwestern regions of Iran. The gold standard for the treatment of a scorpion sting is anti-venom therapy. However, immunotherapy can have serious side effects, such as anaphylactic shock (which can sometimes even lead to death). The aim of the current study was to demonstrate the protective effect of ozone against toxicity induced by Hemiscorpius lepturus (H. lepturus) venom in mice.
METHODSEight hours after the injection of ozone to the experimental design groups, the male mice were decapitated and mitochondria were isolated from five different tissues (liver, kidney, heart, brain, and spinal cord) using differential ultracentrifugation. Then, assessment of mitochondrial parameters including mitochondrial reactive oxidative species (ROS) production, mitochondrial membrane potential (MMP), ATP level, and the release of cytochrome c from the mitochondria was performed.
RESULTSOur results showed that H. lepturus venom-induced oxidative stress is related to ROS production and MMP collapse, which is correlated with cytochrome c release and ATP depletion, indicating the predisposition to the cell death signaling.
CONCLUSIONIn general, ozone therapy in moderate dose can be considered as clinically effective for the treatment of H. lepturus sting as a protective and antioxidant agent.
Animals ; Brain ; drug effects ; metabolism ; Cytochromes c ; metabolism ; Heart ; drug effects ; Kidney ; drug effects ; metabolism ; Liver ; drug effects ; metabolism ; Male ; Membrane Potential, Mitochondrial ; drug effects ; Mice ; Mice, Inbred BALB C ; Muscle, Skeletal ; drug effects ; metabolism ; Myocardium ; metabolism ; Ozone ; pharmacology ; Scorpion Venoms ; toxicity ; Scorpions ; physiology ; Spinal Cord ; drug effects ; metabolism
6.Huaiqihuang Granules () reduce proteinuria by enhancing nephrin expression and regulating necrosis factor κB signaling pathway in adriamycin-induced nephropathy.
Hong LIU ; Wei SUN ; Liu-Bao GU ; Yue TU ; Bing-Yin YU ; Hao HU
Chinese journal of integrative medicine 2017;23(4):279-287
OBJECTIVETo investigate the effects of Huaiqihuang Granules (, HQH), a mixture of Chinese herbs including Trametes robiniophila Murr, Fructus Lycii and Polygonatum sibiricum, on adriamycininduced nephropathy (ADRN) in rats and its underlying mechanisms.
METHODSRats with ADRN were divided into four groups: the sham group, the model group (distilled water), the low-dose HQH-treated (2 g/kg) group, and the high-dose HQH-treated (4 g/kg) group. Body weight and 24-h urinary protein (Upro) were checked every week. After 5-week intervention, at the end of the study, the rats were sacrificed and blood samples were collected for examination of biochemical parameters, including glomerular morphological makers, podocyte shape, cellular apoptosis, expressions of nephrin, inflammatory and apoptosis markers.
RESULTSHQH ameliorated the rat's general status, proteinuria, renal morphological appearance and glomerulosclerosis. The decreased expression of nephrin in ADRN rats was increased by HQH, as well as the impaired podocyte foot process fusion. Cytosolic levels of p65 and inhibitor of nuclear factor κBα (IκBα) were decreased in ADRN rats, and recovered by the treatment of HQH. Consistently, the induced expression of tumor necrosis factor α (TNF-α), phosphorylated nuclear factor κB p65 (p-NFκB p65) and IκBα in ADRN were markedly suppressed by HQH. In addition, induction of Bax, cleaved caspase-3 and cytochrome C in ADRN rats were suppressed by HQH, indicating the amelioration of apoptosis.
CONCLUSIONHQH could ameliorate renal impairments in ADRN rats by increasing nephrin expression, inhibiting NF-κB signaling pathway via the down-regulation of p-NF-κB p65 and p-IκBα, and suppression of glomerular and tubular apoptosis.
Animals ; Apoptosis ; drug effects ; Body Weight ; drug effects ; Caspase 3 ; metabolism ; Chromatography, High Pressure Liquid ; Cytochromes c ; metabolism ; Doxorubicin ; adverse effects ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Kidney ; drug effects ; pathology ; Kidney Diseases ; blood ; chemically induced ; complications ; drug therapy ; Kidney Glomerulus ; drug effects ; pathology ; ultrastructure ; Kidney Tubules ; drug effects ; pathology ; ultrastructure ; Male ; Membrane Proteins ; metabolism ; NF-KappaB Inhibitor alpha ; metabolism ; NF-kappa B ; metabolism ; Organ Size ; drug effects ; Proteinuria ; blood ; complications ; drug therapy ; Rats, Sprague-Dawley ; Signal Transduction ; drug effects ; Transcription Factor RelA ; metabolism ; Tumor Necrosis Factor-alpha ; metabolism ; bcl-2-Associated X Protein ; metabolism
7.Garcinia xanthochymus extract protects PC12 cells from HO-induced apoptosis through modulation of PI3K/AKT and NRF2/HO-1 pathways.
Jing XU ; Sheng GAN ; Jun LI ; De-Bing WAND ; Yu CHEN ; Xin HU ; Guang-Zhong YANG
Chinese Journal of Natural Medicines (English Ed.) 2017;15(11):825-833
The aim of the present study was to investigate the protective effects and underlying mechanisms of Garcinia xanthochymus, a perennial medicinal plant native to Yunnan, China, against HO-induced oxidative damage in rat pheochromacytoma PC12 cells. Preincubation of PC12 cells with fruit EtOAc fraction (fruit-EFr., 12.5-50 µmol·L) of G. xanthochymus for 24 h prior to HO exposure markedly improved cell viability and increased the activities of antioxidant enzymes (superoxide dismutase, catalase, and heme oxygenase-1 [HO-1]), prevented lactate dehydrogenase release and lipid peroxidation malondialdehyde production, attenuated the decrease of matrix metalloproteinases (MMP), and scavenged reactive oxygen species (ROS). Fruit-EFr. also reduced BAX and cytochrome C expression and improved BCL-2 expression, thereby decreasing the ratio of BAX to BCL-2. Fruit-EFr. activated the nuclear translocation of NRF2 to increase HO-1 and induced the phosphorylation of AKT. Its cytoprotective effect was abolished by LY294002, a specific inhibitor of PI3K. Taken together, the above findings suggested that fruit-EFr.of G. xanthochymus could enhance cellular antioxidant defense capacity, at least in part, through upregulating HO-1 expression and activating the PI3K/AKT pathway and that it could suppress HO-induced oxidative damage via PI3K/AKT and NRF2/HO-1 signaling pathways.
Animals
;
Antioxidants
;
metabolism
;
pharmacology
;
Apoptosis
;
drug effects
;
Biological Transport
;
Cell Survival
;
Cytochromes c
;
metabolism
;
Fruit
;
Garcinia
;
Heme Oxygenase-1
;
metabolism
;
Hydrogen Peroxide
;
NF-E2-Related Factor 2
;
metabolism
;
Oxidative Stress
;
drug effects
;
PC12 Cells
;
Phosphatidylinositol 3-Kinase
;
metabolism
;
Phosphatidylinositol 3-Kinases
;
Phosphorylation
;
Plant Extracts
;
pharmacology
;
Protective Agents
;
pharmacology
;
Proto-Oncogene Proteins c-akt
;
metabolism
;
Proto-Oncogene Proteins c-bcl-2
;
metabolism
;
Rats
;
Signal Transduction
;
bcl-2-Associated X Protein
;
metabolism
8.Xuezhikang () reduced renal cell apoptosis in streptozocin-induced diabetic rats through regulation of Bcl-2 family.
Wei-Na LU ; Fen-Ping ZHENG ; Dong-Wu LAI ; Hong LI
Chinese journal of integrative medicine 2016;22(8):611-618
OBJECTIVETo investigate the effect of Xuezhikang (, XZK) on renal cell apoptosis in diabetic rats and the possible mechanism.
METHODSSixty-six rats were randomly divided into 3 groups: the normal, model and XZK groups. In each group, the rats were further randomly divided into 3-month and 6-month subgroups, respectively. Diabetes of rats was induced by a single intraperitoneal injection of 1% streptozocin at 60 mg/kg body weight. Rats in the XZK group received gastric perfusion of XZK (1200 mg/kg body weight) everyday for 3 or 6 months, while rats in the normal and model groups received equal volume of saline. Twenty-four hours' urine was collected for urinary albumin excretion (UAE) measurement. Periodic acid-Schiff (PAS) and Masson's trichrome staining were used for saccharides and collagen detection. Cell apoptosis of renal cortex was investigated by TdT-mediated dUTP nick end labeling (TUNEL) staining. Bax and Bcl-2 expressions were detected by immunohistochemistry and Western blot, respectively. Cytochrome C (Cyt C) and caspase-9 concentration were detected by Western blot.
RESULTSCompared with the model group, XZK treatment could significantly decrease the kidney hypertrophy index, 24 h UAE, renal cell apoptosis, cytoplasmic Cyt C level and active caspase-9 level, as well as suppress the increment of Bax and up-regulate the expression of Bcl-2, leading to the suppression of Bax/Bcl-2 ratio at 3 and 6 months (P<0.05 or P<0.01). Moreover, XZK treatment could alleviate the deposition of PAS-stained saccharides and Masson's trichromestained collagen to different extent.
CONCLUSIONSRenal cell apoptosis was observed in diabetic kidney, in which mitochondrial apoptotic pathway might be involved. XZK treatment could attenuate pathological changes in diabetic kidney and reduce renal cell apoptosis, probably via the suppression of Bax/Bcl-2 ratio, which lead to inhibition of Cyt C release and following caspase-9 activation.
Albuminuria ; blood ; complications ; Animals ; Apoptosis ; drug effects ; Blood Glucose ; metabolism ; Caspase 9 ; metabolism ; Cytochromes c ; metabolism ; Diabetes Mellitus, Experimental ; blood ; drug therapy ; metabolism ; pathology ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Hypertrophy ; In Situ Nick-End Labeling ; Kidney ; drug effects ; pathology ; Kidney Glomerulus ; pathology ; Lipids ; blood ; Male ; Mesangial Cells ; drug effects ; pathology ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Rats, Sprague-Dawley ; Streptozocin ; bcl-2-Associated X Protein ; metabolism
9.Dose-effect relationship between vitamin C and paraquat poisoning rats.
Baoling WEN ; Lei YU ; Yan FANG ; Xiaolong WANG
Journal of Central South University(Medical Sciences) 2016;41(12):1323-1327
To explore the dose-effect relationship between vitamin C and paraquat (PQ) poisoning rats.
Methods: A total of 40 Sprague-Dawley (SD) rats were randomly divided into 4 groups: a control group, a PQ poisoning group, a vitamin C group 1 and a vitamin C group 2 (n=10 in each group). 150 mg/kg PQ was perfused into rat stomach to establish PQ poisoning rat model. In PQ poisoning group, 30 mg/kg methylprednisolone and 2.5 mg/kg cyclophosphamide were injected peritoneally on the basis of PQ poisoning rat model. In vitamin C1 and C2 group, vitamin C was injected at a dosage of 5 or 500 mg/kg, respectively. The control group only received normal saline (NS). The malondialdehyde (MDA), liver and kidney function as well as arterial blood gas in the blood were examined 36 h later. At the end, the rats were killed and took the liver tissues for pathological examination and weight ratio calculation. The glutathione peroxidase (GSH-PX), ctychrome C (Cyt C) in the liver tissues were detected by chromatometry, and the Bcl-2 was detected by Western blot.
Results: Compared with the PQ poisoning group, the MDA and Cyt C were decreased, the GSH-PX was increased, and liver and kidney functions were improved in the vitamin C group 1 (all P<0.01); but in the vitamin C group 2, the MDA increased and liver/kidney functions were impaired (all P<0.01). The expression of Bcl-2 in the PQ poisoning group was lower than that in the control group; compared with the PQ poisoning group, it was increased in the vitamin C1 group, while it was decreased in the vitamin C group 2 (both P<0.01). There was no obvious difference in the lung function, wet/dry weight ratio and pathological changes between the poisoning group and experimental groups (all P>0.05).
Conclusion: Vitamin C at the low dose shows a certain degree of protection for the liver and kidney in the PQ poisoning rats model through it antioxidative activity and anit-apoptosis activity, while vitamin C at the high does may promote oxidation. Meanwhile, vitamin C doesn't show protective effect on lung in the PQ poisoning rats.
Animals
;
Apoptosis
;
drug effects
;
Ascorbic Acid
;
administration & dosage
;
pharmacology
;
Cytochromes c
;
drug effects
;
metabolism
;
Dose-Response Relationship, Drug
;
Glutathione Peroxidase
;
drug effects
;
Kidney
;
drug effects
;
pathology
;
physiopathology
;
Lung
;
drug effects
;
pathology
;
physiopathology
;
Malondialdehyde
;
metabolism
;
Paraquat
;
toxicity
;
Protective Agents
;
pharmacology
;
Proto-Oncogene Proteins c-bcl-2
;
drug effects
;
metabolism
;
Rats
;
Rats, Sprague-Dawley
;
Vitamins
10.Effect of prolonged propofol infusion on myocardial enzyme, mitochondrial cytochrome C and adenosine triphosphate in rabbits.
Guangmin XU ; Zhixun LAN ; Xianxiang TONG
Journal of Central South University(Medical Sciences) 2016;41(11):1181-1185
To explore the effect of long-time propofol infusion on myocardial enzymes, mitochondrial cytochrome C and ATP in rabbits.
Methods: A total of 18 New Zealand rabbits were randomly divided into 3 groups: a control group, a propofol group and an intralipid group. The rabbits were continuously infused with 0.9% normal saline in the control group, 1% propofol in the propofol group, and 10% intralipid in the intralipid group, respectivey. The arterial blood was collected at 0, 8, 16 h and the end of experiment to examine creatine kinase (CK) and creatine kinase isoenzyme (CK-MB). In the end, the myocardial mitochondria from myocardial tissues was separated by differential centrifugation, and mitochondrial cytochrome C content and adenosine triphosphate (ATP) levels were examined by high performance liquid chromatography.
Results: Compared with the control group, the release of cytochrome C from mitochondria were increased in the propofol group and the intralipid group (both P<0.05), but there was no significant difference between them (P>0.05). There was also no significant difference in the ATP content of the mitochondria among the 3 groups (P>0.05). The levels of CK were increased at 8, 16 and 24 h after infusion in the propofol group and the intralipid group compared with that before the infusion (all P<0.05); compared with the control group, the levels of CK were increased at 8, 16 and 24 h after infusion in the propofol group and the intralipid group (all P<0.05); compared with the intralipid group, the levels of CK were increased at 8, 16 and 24 h after infusion in the propofol group (all P>0.05); compared with the control group, the levels of CK-MB were obviously increased in the infusion of propofol for 24 h in the propofol group (P<0.05).
Conclusion: The levels of serum CK increase after the infusion of propofol and intralipid for a long time, and the levels of CK-MB also elevate in the infusion of propofol. Propofol and intralipid can increase the release of myocardial mitochondrial cytochrome C, but they don't affect the ATP production in myocardial mitochondrial.
Adenosine Triphosphate
;
metabolism
;
Animals
;
Creatine Kinase
;
blood
;
metabolism
;
Creatine Kinase, MB Form
;
blood
;
metabolism
;
Cytochromes c
;
metabolism
;
Emulsions
;
administration & dosage
;
pharmacology
;
Infusions, Intravenous
;
Mitochondria
;
drug effects
;
Myocardium
;
chemistry
;
enzymology
;
Phospholipids
;
administration & dosage
;
pharmacology
;
Polyphosphates
;
Propofol
;
administration & dosage
;
pharmacology
;
Rabbits
;
Soybean Oil
;
administration & dosage
;
pharmacology

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