Study on Improvement Effects of Total Ginsenosides on D-galactose Induced PC 12 Cell Senescence and Its Me- chanism / 中国药房

OBJECTIVE：To study the improvement effects of total ginsenosides on the senescence of PC 12 cells induced by D-galactose and its mechanism. METHODS ：Rat pheochromocytoma （PC12）cells were treated with D-galactose to establish cell senescence model. CCK- 8 method was used to screen the D-galactose modeling concentration and total ginsenosides concentration. Normal control group ，model group ，total ginsenosides low and high concentration groups were set up. Cell senescence ，cell apoptosis rate ，apoptotic cycle and mitochondrial membrane potential （MMP），cell adenosine triphosphate （ATP）and reactive oxygen species （ROS）levels in each group were detected. The expression of apoptosis related proteins [B lymphoma 2（Bcl-2）and its related egg X protein （Bax），cytochrome C （Cyt-C）] and oxidative damage related proteins [nuclear factor 2 related factor 2 （Nrf2），heme oxygenase 1（HO-1）] were detected. In addition ，positive drug group [ 5 mmol/L N-acetyl-L-cysteine（NAC）] and positive control group [ D-galactose+5 mmol/L NAC] were set up to compare the levels of oxidative damage related proteins. RESULTS：D-galactose could significantly inhibit the survival rate of PC 12 cells，with a critical concentration of 20 mg/mL. The total ginsenosides could significantly increase the survival rate of D-galactose induced senescent cells with a median effective concentration（EC50）of 65 μg/mL，and then the low and high concentrations of total ginsenosides were set at 55 and 65 μg/mL. Compared with normal control group ，the number of aging cells increased ，the apoptotic rate and percentage of G 1 phase were significantly increased i n model group. the percentage of S phase ，MMP and ATP contents ，the protein expression of Bcl- 2 and Cyt-C in mitochondria were decreased significantly ，whileROS content ，the protein expression of Bax ，Nrf2 and Cyt-C protein in endochylema were increased significantly （P＜0.05 or P＜0.01）. Compared with model group ，the number of E-mail：sunqiao150509@163.com aging cells reduced ，the apoptosis rates and percentage of G 1 phase were significantly decreased in total ginsenosides low and high concentration groups ，the percentage of S phase ，the contents of MMP and ATP （except for low concentration group ），protein expression of Bcl- 2，Nrf2 and HO- 1 as well as protein expression of Cyt-C in mitochondria were increased significantly ；ROS level （except for low concentration group ）and Bax protein as well as protein expression of Cyt-C were decreased significantly. The protein expression of Nrf 2 and HO- 1 were increased significantly in positive control group （P＜0.05 or P＜0.01）， but it was lower than that of total ginsenosides groups . CONCLUSIONS：Total ginsenosides can improve D-galactose induced senescence of P 12 cells，the mechanism of which may be related to activating Nrf 2 antioxidant signal pathway to antagonize D-galactose induced oxidative stress and alleviating mitochondrial dysfunction.

Study on the Inhibitory Effects and Mechanism of New Small Molecular Kinase Inhibitors Ibr- 7 on Human Pancreatic Cancer Capan-2 Cells / 中国药房

OBJECTIVE： To observe the inhibitory effects and possible mechanism of new small molecular kinase inhibitors Ibr-7 [Irutinil（Ibr） derivatives] on human pancreatic cancer Capan-2 cells. METHODS： Taking Capan-2 cells as objects， CCK-8 method was used to determine the proliferation of cells after treated with 1， 2， 4， 8 μmol/L Ibr/Ibr-7 for 48 h. The survival rates of cells were calculated. Sensitization effects of 1 μmol/L Ibr/Ibr-7 on different doses of gemcitabine/paclitaxel （0.062 5， 0.125， 0.25， 0.5， 1 μmol/L） were detected. Clone formation test was used to detect the situation of cell clone formation after treated with 1， 2， 4 μmol/L Ibr/Ibr-7 for 48 h. The number of cell colony formation was recorded. Flow cytometry or JC-1 method was used to detect the apoptosis of cells after treated with 2， 4， 8 μmol/L Ibr-7 for 24 or 16 h and the changes of mitochondrial transmembrane potential； total apoptotic rate and the percentage of mitochondrial membrane potential decrease were calculated. Western blotting was used to detect the expression of related apoptotic protein （PARP， Noxa， Bcl-2， Bax， Mcl-1， Bcl-xL）. RESULTS： After treated with 1， 2， 4， 8 μmol/L Ibr/Ibr-7 for 48 h， the survival rates of cells were decreased significantly； those of Ibr-7 groups were significantly lower than those of same-dose Ibr groups； IC50 of Ibr-7 was significantly lower than that of Ibr （P＜0.05 or P＜0.01）. After combined with Ibr/Ibr-7， the survival rate of cells was significantly lower than that of same-dose gemcitabine/paclitaxel alone group， and the Ibr-7 combination group was significantly lower than same-dose Ibr combination group （P＜0.05 or P＜0.01）. After treated with 2， 4 μmol/L Ibr and 1， 2， 4 μmol/L Ibr-7 for 48 h， the number of cell clone formation was decreased significantly， while Ibr-7 groups were significantly lower than same-dose Ibr groups （P＜0.01）. After treated with different doses of Ibr-7 for 24 or 16 h， total apoptosis rate of cells （2， 4， 8 μmol/L）， the proportion of cell mitochondrial membrane potential decrease （8 μmol/L）， the relative protein expression of Noxa （2， 4， 8 μmol/L） and Bax （8 μmol/L） were increased significantly， while the protein expression of PARP （8 μmol/L）， Bcl-2 （4 μmol/L）， Mcl-1 （2， 4， 8 μmol/L） were decreased significantly； above indexes （except for relative expression of PARP and Bcl-2） of 8 μmol/L Ibr-7 group were significantly better than same-dose Ibr group （P＜0.05 or P＜0.01）. There was no statistical significance in protein expression of Bcl-xL among those groups （P＞0.05）. CONCLUSIONS： Compared with Ibr， Ibr-7 has better inhibitory and apoptotic effects on human pancreatic cancer Capan-2 cells in vitro， and has stronger chemotherapeutic drug sensitization activity， the mechanism of which may be associated with reducing mitochondrial transmembrane potential， down-regulating the protein expression of PARP， Bcl-2 and Mcl-1 and up-regulating the protein expression of Noxa and Bax.

Hawthorn Extract Alleviates Atherosclerosis through Regulating Inflammation and Apoptosis Related Factors: An Experimental Study / 中国结合医学杂志

OBJECTIVE@#To determine the effects of hawthorn extract on serum lipid levels, pathological changes in aortic atherosclerosis plaque, inflammatory factors, and apoptosis-related protein and mRNA expression in apolipoprotein E gene knockout (ApoE) mice.@*METHODS@#Thirty-six ApoE mice were fed with a high-fat diet starting at the age of 8 weeks. Mice were randomly divided into 3 groups by a random number table including model group, hawthorn extract group, and simvastatin group, 12 mice in each group. Twelve 8-week-old C57BL/6 mice were fed a basic diet and served as control. The mice in the control and model groups were administered 0.2 mL saline daily, the mice in the hawthorn extract and simvastatin groups were administered with 50 mg/kg hawthorn extract or 5 mg/kg simvastatin daily for 16 weeks. After 16 weeks, plasma lipids including total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C) were determined by an enzymatic assay. Aortic atherosclerotic lesions were observed by light microscopy, scanning and transmission electron microscopy, respectively. Plasma levels of monocyte chemoattractant protein-1 (MCP-1), interleukin-1β (IL-1β), adiponectin (APN), and hypersensitive C-reactive protein (hs-CRP) were measured by enzyme-linked immunosorbent assay (ELISA). Protein and mRNA expressions of Bax and Bcl-2 in the aorta were assessed by Western blotting and quantitative real-time polymerase chain reaction (qRT-PCR), respectively.@*RESULTS@#Compared to the control group, the plasma levels of TC, TG and LDL-C were significantly increased and HDL-C were significantly decreased in the model group (P<0.01). Compared to the model group, treatment with hawthorn extract significantly decreased the plasma levels of TC, TG, and LDL-C and increased the plasma level of HDL-C in ApoE mice (P<0.01). The levels of MCP-1, IL-1ß, and hs-CRP in the model group were significantly increased and APN was significantly decreased compared with the control group (P<0.01). Compared to the model group, treatment with hawthorn extract decreased the levels of MCP-1, IL-1ß, and hs-CRP and increased the APN level (P<0.01). Compared to the control group, the protein and mRNA expression of Bax in the model group were significantly increased and the expression of Bcl-2 was significantly decreased (P<0.01). Hawthorn extract also reduced the protein and mRNA expression of Bax and increased the Bcl-2 expression in the aorta (P<0.01).@*CONCLUSION@#Hawthorn extract has anti-atherosclerosis and stabilizing unstable plaque effects. The mechanism may be related to the inflflammation and apoptosis signaling pathways.

Effect of hedyotisdiffusa on expressions of apoptosis related protein Fas, caspase3 and caspase7 in Renca renal cell carcinoma of model mice / 中国生化药物杂志

Objective To analyse the effect of hedyotisdiffusa on expressions of apoptosis related protein Fas , caspase3 and caspase7 in Renca renal cell carcinoma of model mice.Methods One hundred and twenty BALB/C male mice were randomly divided into normal control group, model control group, interleukin group, hedyotisdiffusa group, 30 mice in each group, half male and female.Excepted for normal control group , renal cell carcinoma models were established in the other groups , and were given corresponding drug treatment.The tumor size and weight , and the tumor inhibition rate of all mice were observed, and the expression levels of Fas,FasL,caspase3 and caspase7 were detected.Results Compared with model control group, the tumor size and weight were lower , the tumor inhibition rate were higher , the positive expression rates and protein levels of Fas were higher , the positive expression rates and protein levels of FasL were lower, the positive expression rates and expression levels of Caspase3,Caspase7 protein were higher in the mice of interleukin group and hedyotisdiffusa group, all with significant differences ( P<0.05 ).The above indicators in hedyotisdiffusa group were significant improved compared with interleukin group (P<0.05).Conclusion The hedyotisdiffusa can effectively promote the expressions of apoptosis related protein Fas,caspase3 and caspase7 in renal cell carcinoma of model mice, inhibit the expression of FasL protein, improve the tumor suppression rate.

Interaction of SARP1 proteins in fibroblasts of hypertrophic scar / 中华医学美学美容杂志

Objective To study interaction proteins with secreted apoptosis-related protein 1 (SARP1) in fibroblasts of hypertrophic scar and to analyze its molecular mechanisms.Methods The recombinant adenovirus Ad-SARP1 was successfully constructed and transfected into the fibroblasts of hypertrophic scar in culture.The proteins were precipitated by immunoprecipitation and separated by SDS-PAGE,then it was stained with Coomassie blue and proteins from SDS-PAGE gel electrophoresis strip were analyzed with enzymolysis and mass spectrometric in turn.The peptide sequences were obtained according to mass spectrometry and the database were searched automatically.Results The results showed that in control cells,Ad-SARP1 and Ad-EGFP infected cells,were precipitated 7 protein bands,their molecular weights were about 93 × 103,43 × 103,40 × 103,37 × 103,31 × 103,26 × 103 and 12× 103,respectively; without SARP1 antibody the protein bands did not precipitate.Analysis of the 6 protein bands showed that proteins that might interact with SARP1 included periostin precursor (OSF-2),asporin precursor (PLAP1),phosphoglycerate kinase 1,rCG50690,apolipoprotein A-I precursor (Apo-AI),and thioredoxin 1 (TRX1).Conclusions The interaction proteins of SARP1 can be obtained by immunoprecipitation combined with liquid chromatography/mass spectrometry and ion trap detection technology.These results provide new clues for the mechanism of SARP1 regulates the apoptosis signal pathway of HSFb.

Effects of secreted apoptosis-related protein 1 on relative apoptosis proteins and apoptosis of fibroblasts in hypertrophic scar / 中华医学美学美容杂志

Objective To explore the effects of secreted apoptosis-related protein 1 (SARP1) on apoptosis of the hyperstrophic scar fibroblasts (HSFB) and its regulating mechnisms.Methods The recombinant vector was identified by enzyme digestion analysis.And the virus supernatant of the recombinant vector was extracted from packaged 293 cells,then it infected the skin fibroblasts from hypertrophic scar patients,which aimed to promote its expression of SARP1 protein.After adenovirus infection,the expression of SARP1 in the fibroblasts was confirmed by RT-PCR and Western blot.The effect of SARP1 on proliferation of HSFB was detected by MTT assay,and the effect of SARP1 on apoptosis of HSFB was detected and change of the cells functions were analyzed by FACS.Results Recombinants were confirmed.After adenovirus infection,both protein and mRNA of SARP1 were detected in HSFB.And the mRNA value of SARPlwas detected to increase significantly by RT-PCR and the protein expression was detected to increase significantly by Western blot (P＜0.05).The proliferation in the groups of the adenovirus infection and HSFB was positively regulated by SARP1 (P＜0.01) and the apoptosis of them was inhibited by the expression of SARP1 as compared to the control groups of HSFB and Ad-EGFP.It showed that the apoptosis index decreased as compared the group of infected fibroblasts to the control group by flow cytometry.Conclusions SARP1 could be highly expressed in HSFB by adenovirus infection,exhibiting the proliferation-enhancing and apoptosis-inhibiting effects on HSFB.

Effect of tetrandrine eye drops on expression of apoptotic protein and transforming growth factor-β2 in human Tenon capsule fibroblast in vitro / 中华实验眼科杂志

BackgroundOur previous study determined that tetrandrine (Tet) has an inhibitory effect on the proliferation of human Tenon capsule fibroblasts ( TCFs ) in vitro,but its mechanism is poorly understood.ObjectiveThis study was to investigate the effect mechanism of Tet on human TCFs.MethodsHuman TCFs were isolated and cultured from scleral tissue of donor using explant technique.The cells were identified by vimentin antibody staining and morphology.The third generation of cells were seeded in the culture plate at the density of 1 × 105 cells/ml.Twenty-four hours after inoculation,the Tet of 1 × 10-5 mol/L was added in the well of culture plate,and the cells cultured only in 1640 medium served as the control group.The apoptosis of the cells was assessed by TUNEL,and the expressions of bax,bel-2,transforming growth factor-β2 (TGF-β2 ) in TCFs were detected using immunochemistry.Results The cultured cells showed the features of the fibroblasts in shape with the positive response for vimentin.A number of TUNEL positive cells were seen in Tet group and no TUNEL positive response was found in control group.The expression levels (A value) of bax,bcl-2 and TGF-~ protein in TCFs were 0.577 ± 0.009,0.430±0.012 and 0.341 ±0.017 in Tet group,and those in control group were 0.320±0.015,0.819±0.021 and 0.624±0.014 respectively,showing statistically significant differences between two groups( t =33.277,-35.356,-28.093,P＜0.01 ).Conclusions Tet suppresses the proliferation of human TCFs through up-regulating the expression of bax and down-regulating the expressions of bcl-2 and TGF-β2 in vitro.

Role of apoptosis in triptolide-induced acute nephrotoxicity and possible mechanisms in rats / 中草药

Objective: To investigate the role of apoptosis in triptolide-induced acute nephrotoxicity and the possible mechanisms in vivo. Methods Thirty male SD rats were randomly divided into control and two testing groups. The rats of two testing groups were ip injected with triptolide solution at doses of 1 and 2 mg/kg of body weight, respectively, and the rats of the control group were ip injected with 0.9% physiological saline instead. Testing rats were killed 48 h after the injection; Blood samples were collected and both kidneys were removed. The BUN and Scr concentrations in plasma were measured, and renal histology was examined by HE staining. TUNEL staining was performed to evaluate apoptosis of renal tissue. Renal expression of apoptosis related proteins Bcl-2, Bax, Bid, Bad, Fas, and FasL proteins, as well as corresponding regulating genes were assessed by immuno-histochemical staining and real-time PCR. Results: After injection, a large number of apoptotic tubular cells appeared corresponding to the increases of BUN and Scr concentrations. Furthermore, increased expression of Bax, Bid, Bad, Fas, and FasL was detected at both protein and mRNA levels, but the expression of Bcl-2 did not differ among the three groups. Conclusion: These results suggest that apoptosis of tubular cells plays a key role in the pathogenesis of triptolide-induced acute nephrotoxicity, and Bcl-2 family, as well as Fas and FasL, is involved in this process.

Effect of Toxoplasma gondii infection on the placental apoptosis-related protein of BALB/c mice during the second trimester of pregnancy / 中国人兽共患病学报

To observe the influence of the placental apoptosis on the expression of Bax,Bcl-2, Fas, FasLand TNF-α during the second trimester of pregnancy, mice of experimental group were intraperitoneal injected with 100 purified Toxoplasma gondii tachyzoites added in 0.2mL of PBS, while those of the control group were injected with 0.2 mL of sterile PBS (0.01 mol/L, pH 7.4) in the 8-th day of pregnancy. During the 12, 14, 16 and 18-th days of pregnancy, 5 mice both in experimental and control group were randomly killed and the expression levels of the apoptosis-related proteins Bax, Bcl-2, Fas, FasL and TNF-α in the placental tissues were determined by means of immunohistochemical methods. It was showed that the apoptosis-related protein expressed both in villus and decidua of the placenta, most of which were expressed in syneytiotrophoblast (ST). The positive cells with expression of Bax, Fas, FasL and TNF-α increased along with the increase of the pregnant days in both the experimental group and the control group, and the positive cells with expression of Bcl-2 decreased along with the increase of the pregnant days. It was also demonstrated that the positive cells with expression of Bax, Fas, FasL and TNF-α of the experimental group showed a higher percentage of expression than that of the control group on the same pregnant days, but the positive cells with Bcl-2 expression of the experimental group were fewer than that of the control group. It is concluded that the expression of apoptosis-related protein Bax, Bcl-2, Fas, FasL and TNF-α in the placenta were altered when the pregnant mice were infected with Toxoplasma gondii during the second trimester, which may induce the apoptosis through the endogenic and ectogenic pathway.

Prokaryotic expression of a novel mouse pro-apoptosis protein PNAS-4 and application of its polyclonal antibodies

Mouse PNAS-4 (mPNAS-4) has 96 percent identity with human PNAS-4 (hPNAS-4) in primary sequence and has been reported to be involved in the apoptotic response to DNA damage. However, there have been no studies reported of the biological functions of mPNAS-4. In studies conducted by our group (unpublished data), it was interesting to note that overexpression of mPNAS-4 promoted apoptotic death in Lewis lung carcinoma cells (LL2) and colon carcinoma cells (CT26) of mice both in vitro and in vivo. In our studies, mPNAS-4 was cloned into the pGEX-6P-1 vector with GST tag at N-terminal in Escherichia coli strain BL21(DE3). The soluble and insoluble expression of recombinant protein mPNAS-4 (rmPNAS-4) was temperature-dependent. The majority of rmPNAS-4 was insoluble at 37°C, while it was almost exclusively expressed in soluble form at 20°C. The soluble rmPNAS-4 was purified by one-step affinity purification, using a glutathione Sepharose 4B column. The rmPNAS-4 protein was further identified by electrospray ionization-mass spectrometry analysis. The search parameters of the parent and fragment mass error tolerance were set at 0.1 and 0.05 kDa, respectively, and the sequence coverage of search result was 28 percent. The purified rmPNAS-4 was further used as immunogen to raise polyclonal antibodies in New Zealand white rabbit, which were suitable to detect both the recombinant and the endogenous mPNAS-4 in mouse brain tissue and LL2 cells after immunoblotting and/or immunostaining. The purified rmPNAS-4 and our prepared anti-mPNAS-4 polyclonal antibodies may provide useful tools for future biological function studies for mPNAS.

Expression of Proteins Related Cell Cycle and Apoptosis during Diethylnitrosamine (DEN)-induced Hepatocarcinogenesis in Rats

PURPOSE: To explore the role of cell cycle and apoptosis regulators during hepatocarcinogenesis, the expression of cell cycle-related proteins (cyclin D1 and p27kip1) and apoptosis-related proteins (p53, survivin, caspase 3). METHODS: Sprague-Dawley rats were given 120 ppm diethylnitrosamine (DEN) as a carcinogen and sequentially sacrificed. The expression of cell cycle and apoptotic related proteins were examined by light microscopy and immunohistochemistry. RESULTS: During the DEN-induced hepatocarcinogenesis, sequential histologic changes from preneoplastic lesions (altered hepatic cellular foci, hyperplastic nodules, and hepatocellular adenomas) and ultimately overt hepatocellular carcinomas and metastatic lesions were noted. The cyclin D1 were progressively increased from preneoplastic lesions to hepatocellular carcinomas. However, the p27kip1 and the survivine proteins did not show any other difference with the increasing degree of carcinogenesis. The p53 and caspase 3 proteins were more significantly increased in hepatocellular carcinomas than preneoplastic lesions. The cyclin D1 protein expression did not show any correlation with the expression of p27Kip1 protein, but the p53 expression was related to the expression of survivin and caspase 3. CONCLUSION: From the above results, over-expression of cyclin D1 plays a role in the early and late stages of hepatocarcinogenesis. In addition p53 and caspase 3 might be useful markers for evaluating the risk of malignant transformation.

Expression and significance of the ICE, Fas and FasL protein in the esophageal carcinoma / 中国康复理论与实践

@#ObjectiveTo study the relationship between the antitumor immunoreaction and the cell apoptosis in esophageal carcinoma.MethodsThe IL-1β converting enzyme, Fas and FasL protein were labeled by LSAB immunohistochemistric method in 46 cases of esophageal carcinoma, of which 13 cases were labeled by TdT mediated dUTP nick end labeling (TUNEL).ResultsThe positive rates of ICE, Fas and FasL proteins in the cancer nests were 78.26%, 60.87% and 47.83%. The expression of ICE protein was related to the histological grading of the cancer.Conclusions The expression of Fas, FasL protein may be related to the immunological escape of the cancer cell; the expression of ICE was related to the histological grading of the cancer.

Premature Ovarian Failure: Histologic Analysis and Immunohistochemical Study of the Ovary with Apoptosis Related Proteins / 대한산부인과학회잡지

OBJECTIVES: Recently, it was suggested that apoptosis may be a basic mechanism of follicular atretic process. If the POF(premature ovarian failure) results from an acceleration of the process of atresia of the oocytes causing premature deletion of stored oocytes, POF may be a good model for the apoptosis. Our objective is to determine the relation between the POF and apoptosis. METHODS: We performed laparoscopic ovarian biopsy in 17 patients with POF. We evaluated the ovaries from a patient with POF by conventional H-E stining and immunohistochemical staining for apoptosis related protein(bcl-2, bax, fas and fas-L). RESULTS: Atretic cystic follicles were seen 4 out of 17 patients, and corpora albicans indicating past ovulation were seen 9 out of 17 patients. Primordial follicles were seen in 3 out of 17 patients, however developing follicles were not seen in all patients. Immunohistochemical analysis revealed that Bax was expressed in the lining cells of the atretic cystic follicle and primordial follicle and mesothelial cells lining the surface of the ovary. Fas and Fas-L were expressed on the lining pregranulosa cells and primary oocyte of the primordial follicle in the ovary of the patient with premature ovarian failure. Bax were also expressed on the lining pregranulosa cell and oocyte of the premature ovarian failure. Bcl-2 was expressed in the lining cells of primordial follicles of the patients with POF. CONCLUSION: Apoptosis may be a basic mechanism of POF. Bax, fas and fas-L may play a role causing premature follicular depletion.

Relationship between the Expression of Apoptosis-Related Proteins and Chemosensitivity in Gastric Cancer Cell Lines

BACKGROUND: There has been a growing realization that a variety of anticancer drugs can induce apoptotic cell death. In the present study, an attempt was made to investigate the responsiveness of gastric cancer cells to various anticancer drugs and to identify which apoptosis-related proteins could be correlated to chemosensitivity. METHODS: Nine human Korean gastric cancer cell lines (SNU-1, -5, -16, -484, -601, -620, -638, -668, and -719) were analyzed. The cytotoxicity of each cell line to camptothecin, cisplatin, mitomycin C, vincristine, 5-FU, epirubicin, and doxorubicin was determined by using a MTT (dimethylthiazole- diphenyltetrazolium-bromide) assay. Apoptosis-related proteins (p53, p21, Bcl-2, Bcl-x, and Bax) were detected using a Western blot assay. RESULTS: Of the nine gastric cancer cell lines, SNU-1 was resistant while SNU-5 was sensitive to anticancer drugs. Mutated p53 was detected in all the cell lines. The highest expression of Bcl-2 was observed in SNU-1 while less or no expression of Bcl-2 was observed in SNU-5, -484, and -601. Bcl-xL was less expressed in SNU-5 than in the other cell lines. CONCLUSIONS: Chemosensitivity in gastric cancer cell lines was correlated mainly with the level of Bcl-2 and partly with that of Bcl-xL. There was no correlation between the chemosensitivity and other apoptosis-related proteins, such as p21, p53, Bax, and Bcl-xS in the studied gastric cancer cell lines.

Inductive effect of Prunella vulgaris Injection on K562 cells apoptosis / 中草药

Objective To investigate the antileukemia effect of Prunella vulgaris Injection(PVI) in order to offer experimental data for the treatment of leukemias with PVI in clinic.Methods Inhibition of PVI on K562 cell proliferation and IC_(50) value was assayed by MTT assay.The growth curve of K562 cells was drawn also.The cellular morphology was observed by invert microscope,Giemsa staining,and MTT assay.The apoptosis induced the effect of PVI to K562 cells was observed by trypan-blue exclusion test and flow cytometer(FCM).The expression of apoptosis related protein bcl-2 and bax was measured by immunocytochemistry,and the quantitative analysis was made with figure analysis system.Results PVI obviously inhibited the proliferation of K562 cells in a dose-dependent manner(r=0.985 0).The IC_(50) was 0.113 mg/mL.(After) K562 cells were treated with PVI(50 mg/mL),the morphological characters of apoptosis were observed.The results of FCM showed that the apoptosis rats [(37.15?1.46)%] in the treatment group were significant higher than that in control group [(5.56?0.68)%](P