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Kanetaka K, Sakamoto M, Yamamoto Y, Takamura M, Kanematsu T, Hirohashi S. Possible involvement of tetraspanin CO-029 in hematogenous intrahepatic metastasis of liver cancer cells. J Gastroenterol Hepatol 2003; 18:1309-14. [PMID: 14535989 DOI: 10.1046/j.1440-1746.2003.03182.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [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: 12/09/2022]
Abstract
BACKGROUND AND AIM A correlation between overexpression of tetraspanin CO-029 and the intrahepatic spread of hepatocellular carcinoma (HCC) has been observed in surgically resected specimens from humans. However, the cellular mechanisms involved in CO-029 protein modulation of the metastatic phenotype are unknown. In the present study, CO-029 cDNA was stably transfected into a non-metastatic human HCC cell line to investigate whether it could directly promote metastasis. METHODS We constructed a human HCC cell line that stably overexpressed CO-029 and mock transfectants. Using these transfectants, we examined cell proliferation characteristics in monolayer culture and the ability to adhere to culture plates coated with laminin, fibronectin, vitronectin and collagen type-I or type-IV. Orthotopic implantation of these transfectants to SCID mice was also performed. RESULTS Several clones of CO-029 transfectants and mock transfectants were established. The growth rates and adhesive properties to the extracellular matrix did not differ between CO-029 and mock transfectants. When orthotopically implanted, the size of the primary tumor in the liver did not differ between CO-029 and the mock transfectants. However, only CO-029 positive clones developed intrahepatic metastatic lesions. CONCLUSION These results suggest that CO-029 might be involved in hematogenous intrahepatic metastasis, although the precise cellular mechanisms involved remain unknown.
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Affiliation(s)
- Kengo Kanetaka
- Pathology Division, National Cancer Center Research Institute, Tokyo, Japan
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Huber M, Bahr I, Krätzschmar JR, Becker A, Müller EC, Donner P, Pohlenz HD, Schneider MR, Sommer A. Comparison of proteomic and genomic analyses of the human breast cancer cell line T47D and the antiestrogen-resistant derivative T47D-r. Mol Cell Proteomics 2003; 3:43-55. [PMID: 14557597 DOI: 10.1074/mcp.m300047-mcp200] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [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: 01/07/2023] Open
Abstract
In search of novel mechanisms leading to the development of antiestrogen-resistance in human breast tumors, we analyzed differences in the gene and protein expression pattern of the human breast carcinoma cell line T47D and its derivative T47D-r, which is resistant toward the pure antiestrogen ZM 182780 (Faslodex trade mark, fulvestrant). Affymetrix DNA chip hybridizations on the commercially available HuGeneFL and Hu95A arrays were carried out in parallel to the proteomics analysis where the total cellular protein content of T47D or T47D-r was separated on two-dimensional gels. Thirty-eight proteins were found to be reproducibly up- or down-regulated more than 2-fold in T47D-r versus T47D in the proteomics analysis. Comparison with differential mRNA analysis revealed that 19 of these were up- or down-regulated in parallel with the corresponding mRNA molecules, among which are the protease cathepsin D, the GTPases Rab11a and MxA, and the secreted protein hAG-2. For 11 proteins, the corresponding mRNA was not found to be differentially expressed, and for eight proteins an inverse regulation was found at the mRNA level. In summary, mRNA expression data, when combined with proteomic information, provide a more detailed picture of how breast cancer cells are altered in their antiestrogen-resistant compared with the antiestrogen-sensitive state.
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Affiliation(s)
- Martina Huber
- Research Laboratories of Schering AG, 13342 Berlin, Germany
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103
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Shimizu M, Yoshimoto T, Matsuzawa A, Takeda Y. Modification of tumor cells with Fas (CD95) antigen gene and Fas ligand (CD95L) gene transfection by electroporation for immunotherapy of cancer. Mol Biotechnol 2003; 25:79-87. [PMID: 13679638 DOI: 10.1385/mb:25:1:79] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 11/11/2022]
Abstract
Electroporation is a method for introducing DNA into cells by using a high-voltage electric field. This method is very simple and easily manipulated. We describe here a method for the modification of tumor cells with the Fas/Apo-1 (CD95) antigen-gene and Fas ligand (FasL)-gene transfection through the use of electroporation, and suggest that the Fas-FasL system is a good target for the induction of apoptosis-mediated antitumor activity. The Fas receptor/ligand system induces apoptosis and plays an important role in regulation of the immune system. In the method described, hepatoma MH134 (Fas- and FasL-) is transfected with murine Fas and FasL cDNA. A single administration of monoclonal anti-Fas antibody efficiently suppresses the growth of F6b (MH134+Neo+Fas) tumors but not that of N1d (MH134+Neo) tumors in gld/gld lpr/lpr mice. MH134+Neo+FasL tumor cells were rejected after the induction of inflammation with infiltration of neutrophils in mice. These results suggest that electroporation and Fas-mediated apoptosis are a good method for inducing of antitumor activity.
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Affiliation(s)
- Motomu Shimizu
- Medical Research and Development Center, Tokyo Metropolitan Institute of Medical Science, Tokyo Metropolitan Organization for Medical Research, Honkomagome 3-18-22, Bunkyo-ku, Tokyo, 113- 8613, Japan.
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Fraser SP, Grimes JA, Diss JKJ, Stewart D, Dolly JO, Djamgoz MBA. Predominant expression of Kv1.3 voltage-gated K+ channel subunit in rat prostate cancer cell lines: electrophysiological, pharmacological and molecular characterisation. Pflugers Arch 2003; 446:559-71. [PMID: 12838421 DOI: 10.1007/s00424-003-1077-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2002] [Accepted: 03/24/2003] [Indexed: 11/26/2022]
Abstract
Voltage-gated K+ currents expressed in two rat prostate cancer ("Dunning") cell lines of markedly different metastatic ability were characterised using electrophysiological, pharmacological and molecular approaches. Whole-cell patch-clamp recordings showed that both strongly metastatic MAT-LyLu and weakly metastatic AT-2 cell lines possessed outward (delayed-rectifier type) K+ currents, which activated at around -40 mV. From the parameters measured, several characteristics of the two cell lines were similar. However, a number of statistically significant differences were noted for MAT-LyLu versus the AT-2 cells as follows: (1) current densities were smaller; (2) the slope factor for channel activation was smaller; (3) the voltage at which current was half-inactivated, and the slope factor for channel inactivation were greater; (4) the time constants for current decay at -20 and 0 mV were smaller; and (5) the residual peak current was larger following 60 s of repetitive voltage pulses for stimulation frequencies in the range 0.05-0.2 Hz. On the other hand, the K+ currents in both cell lines showed similar pharmacological profiles. Thus, the currents were blocked by 4-aminopyridine, tetraethylammonium, verapamil, margatoxin, and charybdotoxin, with highly similar IC(50)s for given blockers. The electrophysiological and pharmacological data taken together suggested expression of voltage-gated K+ channels of the Kv1 family, expression of the Kv1.3 subunit being predominant. Western blot and RT-PCR tests both confirmed that the cells indeed expressed Kv1.3 and to a lesser extent Kv1.4 and Kv1.6 channel alpha-subunits. In view of the similarity of channel expression in the two cell lines, voltage-gated K+ channel activity may not be a primary determinant of metastatic potential in the rat model of prostate cancer, but the possible contribution of K+ channel activity to the metastatic process is discussed.
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Affiliation(s)
- S P Fraser
- Department of Biological Sciences, Imperial College of Science, Technology and Medicine, Sir Alexander Fleming Building, London SW7 2AZ, UK.
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105
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Abstract
AIM: Now many countries have developed cancer therapy with heavy ions, especially in GSI (Gesellschaft fürSchwerionenforschung mbH, Darmstadt, Germany), remarkable results have obtained, but due to the complexity of particle track structure, the basic theory still needs further researching. In this paper, the genotoxic effects of heavy ions irradiation on SMMC-7721 cells were measured using the single cell gel electrophoresis (comet assay). The information about the DNA damage made by other radiations such as X-ray, γ-ray, UV and fast neutron irradiation is very plentiful, while little work have been done on the heavy ions so far. Hereby we tried to detect the reaction of liver cancer cells to heavy ion using comet assay, meanwhile to establish a database for clinic therapy of cancer with the heavy ions.
METHODS: The human hepatoma cells were chosen as the test cell line irradiated by 80Mev/u 20Ne10+ on HIRFL (China), the radiation-doses were 0, 0.5, 1, 2, 4 and 8 Gy, and then comet assay was used immediately to detect the DNA damages, 100-150 cells per dose-sample (30-50 cells were randomly observed at constant depth of the gel). The tail length and the quantity of the cells with the tail were put down. EXCEL was used for statistical analysis.
RESULTS: We obtained clear images by comet assay and found that SMMC-7721 cells were all damaged apparently from the dose 0.5 Gy to 8 Gy (t-test: P < 0.001, vs control). The tail length and tail moment increased as the doses increased, and the number of cells with tails increased with increasing doses. When doses were higher than 2 Gy, nearly 100% cells were damaged. Furthermore, both tail length and tail moment, showed linear equation.
CONCLUSION: From the clear comet assay images, our experiment proves comet assay can be used to measure DNA damages by heavy ions. Meanwhile DNA damages have a positive correlation with the dose changes of heavy ions and SMMC-7721 cells have a great radiosensitivity to 20Ne10+. Different reactions to the change of doses indicate that comet assay is a useful tool to detect DNA damage induced by heavy ions.
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Affiliation(s)
- Li-Mei Qiu
- Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000, Gansu Province, China.
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Parihar AS, Coghlan MJ, Gopalakrishnan M, Shieh CC. Effects of intermediate-conductance Ca2+-activated K+ channel modulators on human prostate cancer cell proliferation. Eur J Pharmacol 2003; 471:157-64. [PMID: 12826234 DOI: 10.1016/s0014-2999(03)01825-9] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [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: 12/18/2022]
Abstract
The effects of 1-ethyl-2-benzimidazolinone (1-EBIO) and riluzole on human prostate cancer cells, LNCaP and PC-3, were evaluated using rubidium (86Rb(+)) efflux and proliferation assays. 1-EBIO and riluzole evoked concentration-dependent increases in 86Rb(+) efflux from LNCaP and PC-3 cells that were sensitive to inhibition by intermediate-conductance Ca(2+)-activated K(+) channel (IK(Ca)) blockers clotrimazole and charybdotoxin. Blockers of large-conductance Ca(2+)-activated K(+) (BK(Ca)) channel, iberiotoxin, or small-conductance Ca(2+)-activated K(+) (SK(Ca)) channel, apamin or scyllatoxin, had no effect. Concurrently, both 1-EBIO and riluzole evoked concentration-dependent increases in proliferation from human prostate cancer cell lines (LNCaP and PC-3 cells). Clotrimazole and charybdotoxin, but not iberiotoxin, apamin or scyllatoxin, inhibited 1-EBIO- and riluzole-evoked increases in proliferation from LNCaP and PC-3 cells. N-(3-(trifluoromethyl)phenyl)-N'-(2-hydroxy-5-chlorophenyl)urea (NS-1608) and 2-amino-5-(2-fluorophenyl)-4-methyl-1H-pyrrole-3-carbonitrile (NS-8), BK(Ca) channel openers had no effect on LNCaP and PC-3 proliferation. These results demonstrate that IK(Ca) channels play an important role in the regulation of human prostate cancer cell proliferation.
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Affiliation(s)
- Ashutosh S Parihar
- Neuroscience Research, Global Pharmaceutical Research and Development, Department R4PM, Building AP9A, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, IL 60064-6125, USA
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Li YZ, Wang Q, Jiang YF. Establishment of hepatocarcinoma cell line transfected by the B7 gene and its biocharacteristics. Hepatobiliary Pancreat Dis Int 2003; 2:278-80. [PMID: 14599984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To study the function of costimulation sign in tumor immunology and construct the new cell line B7+ Smmc7721. METHODS The B7 gene was transfected into the hepatocarcinoma cell Smmc7721 by liposma. Polymerase chain reaction (PCR) and reverse transcriptase-PCR (RT-PCR) were applied to test the result. MTT colorimetric assay was used to value the killing effect of lymphokine activated killer cells (LAK) activated by IL-2 on the transfected cell line and the original line. RESULT B7+ Smmc7721 was improved to be steadily expressed B7 molecule and LAK cells could more effectively act on the B7+ Smmc7721 cells. CONCLUSION The B7 gene can be transfected to hepatocarcinoma cells and can be expressed steadily in vitro, thus increasing the efficiency of LAK cells activated by IL-2 on them.
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Affiliation(s)
- You-Zhu Li
- First Clinical Hospital, Jilin University, Changchun 130021, China.
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108
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Tijerina M, Kopecková P, Kopecek J. Correlation of subcellular compartmentalization of HPMA copolymer-Mce6 conjugates with chemotherapeutic activity in human ovarian carcinoma cells. Pharm Res 2003; 20:728-37. [PMID: 12751627 DOI: 10.1023/a:1023425300829] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE Intracellular targets sensitive to oxidized damage generated by photodynamic therapy (PDT) utilizing N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer-mesochlorin e6 monoethylenediamine (Mce6) conjugates was explored to aid in the design of second generation PDT delivery systems. METHODS Low temperature, metabolic inhibitor, and nuclear localization sequences (NLS(FITC)) were used to achieve desired subcellular localization that was evaluated by confocal analysis and subcellular fractionation. Mce6 was bound to HPMA copolymer conjugates via non-degradable dipeptide linkers (P-GG-Mce6, P-NLS(FITC)-GG-Mce6) or lysosomally degradable tetrapeptide spacers (P-GFLG-Mce6, P-NLS(FITC)-GFLG-Mce6). Chemotherapeutic efficacy was assessed by the concentration that inhibited growth by 50% (IC50), cell associated drug concentration (CAD) and confocal microscopy. RESULTS P-GFLG-Mce6 possessed enhanced chemotherapeutic activ ity compared to P-GG-Mce6 indicating enzymatically released Mce6 was more active than copolymer-bound Mce6. Lysosomes appeared less sensitive to photodamage as observed by a higher IC50. Nuclear-directed HPMA copolymer-Mce6 conjugates (P-NLS(FITC)-GG-Mce6, P-NLS(FITC)-GFLG-Mce6) possessed enhanced chemotherapeutic activity. However, control cationic HPMA copolymer-Mce6 conjugates containing a scrambled NLS (P-scNLS(FITC)-GG-Mce6) or amino groups (P-NH2-GG-Mce6) also displayed increased chemotherapeutic activity. CONCLUSIONS Nuclear delivery was observed for P-NLS(FITC)-GG-Mce6 and P-NLS(FITC)-GFLG-Mce6 indicating NLS was a feasible approach for nuclear delivery. Due to the cationic nature of NLS, increased membrane binding of PDT systems incorporating cationic nuclear targeting moieties must be addressed.
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Affiliation(s)
- Monica Tijerina
- Department Pharmaceutics, University of Utah, Salt Lake City 84112, USA
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109
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Abstract
Whereas some sphingolipids such as sphingoid bases and ceramide can mediate and induce cell killing, other sphingolipids such as sphingosine 1-phosphate promote cell survival or proliferation. The tight equilibrium between the intracellular levels of each of these biomodulators is controlled by the various enzymes that either produce or degrade these lipid molecules. Herein, the effects of sphingoid bases and their derivatives on the regulation of (cancer) cell growth and death are reviewed. In addition, the consequences of pharmacological manipulation of the enzymes that govern sphingoid base metabolism on in vitro and in vivo tumor cell growth are presented. Further development of pharmacological tools aimed at interfering with the metabolism of sphingolipids is expected to provide new avenues in the treatment of cancers as well as other diseases.
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Affiliation(s)
- Olivier Cuvillier
- Inserm U466, Hôpital Rangueil, TSA 50032, 1 Avenue Jean Poulhès, 31059 Toulouse Cedex 9, France.
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Chauhan SS, Liang XJ, Su AW, Pai-Panandiker A, Shen DW, Hanover JA, Gottesman MM. Reduced endocytosis and altered lysosome function in cisplatin-resistant cell lines. Br J Cancer 2003; 88:1327-34. [PMID: 12698203 PMCID: PMC2747565 DOI: 10.1038/sj.bjc.6600861] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
We isolated human KB adenocarcinoma cisplatin-resistant (CP-r) cell lines with multidrug-resistance phenotypes because of reduced accumulation of cisplatin and other cytotoxic compounds such as methotrexate and heavy metals. The uptake of horseradish peroxidase (HRPO) and Texas Red dextran was decreased several-fold in KB-CP-r cells, indicating a general defect in fluid-phase endocytosis. In contrast, although EGF receptors were decreased in amount, the kinetics of EGF uptake, a marker of receptor-mediated endocytosis, was similar in sensitive and resistant cells. However, 40-60% of the (125)I-EGF released into the medium after uptake into lysosomes of KB-CP-r cells was TCA precipitable as compared to only 10% released by sensitive cells. These results indicate inefficient degradation of internalised (125)I-EGF in the lysosomes of KB-CP-r cells, consistent with slower processing of cathepsin L, a lysosomal cysteine protease. Treatment of KB cells by bafilomycin A(1), a known inhibitor of the vacuolar proton pump, mimicked the phenotype seen in KB-CP-r cells with reduced uptake of HRPO, (125)I-EGF, (14)C-carboplatin, and release of TCA precipitable (125)I-EGF. KB-CP-r cells also had less acidic lysosomes. KB-CP-r cells were crossresistant to Pseudomonas exotoxin, and Pseudomonas exotoxin-resistant KB cells were crossresistant to cisplatin. Since cells with endosomal acidification defects are known to be resistant to Pseudomonas exotoxin and blocking of endosomal acidification mimics the CP-r phenotype, we conclude that defective endosomal acidification may contribute to acquired cisplatin resistance.
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Affiliation(s)
- S S Chauhan
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Dr, Room 1A09, Bethesda, MD 20842-4254, USA
| | - X J Liang
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Dr, Room 1A09, Bethesda, MD 20842-4254, USA
| | - A W Su
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Dr, Room 1A09, Bethesda, MD 20842-4254, USA
| | - A Pai-Panandiker
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Dr, Room 1A09, Bethesda, MD 20842-4254, USA
| | - D W Shen
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Dr, Room 1A09, Bethesda, MD 20842-4254, USA
| | - J A Hanover
- Laboratory of Cell Biochemistry and Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, 8 Center Dr., Room 402, Bethesda, MD 20892-0850, USA
| | - M M Gottesman
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Dr, Room 1A09, Bethesda, MD 20842-4254, USA
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 37 Convent Dr, Room 1A09, Bethesda, MD 20842-4254, USA. E-mail:
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111
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Abstract
Polyethylene glycol (PEG) has been coupled to many cationic polymers such as polyethylenimine (PEI) to improve the stability and transfection efficiency. We prepared PEG-grafted PEI with different lengths and amounts of PEG and used these graft copolymers as nonviral gene vectors. We measured the complex size and zeta-potential of polymer-DNA complexes in the presence of salt to estimate the stability of polymer-DNA complexes. We also investigated the cytotoxicity and transfection efficiency in C3 cells. In the case of graft copolymers, the stability of polymer-DNA complexes and transfection efficiency were affected by the graft length and amount of PEG side chain. PEG side chains stabilize the polymer-DNA complexes in the presence of salt, but the longer PEG side chains also interrupt the gene delivery in the cells due to the more efficient steric hindrance by longer PEG side chains, and therefore the transfection efficiency is decreased. Short PEG side chains with molecular weight of 350 kDa stabilized the polymer-DNA complexes without decreased transfection efficiency.
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Affiliation(s)
- Shi-Joon Sung
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejon
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112
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Abstract
Neuronal apoptosis may contribute to pathologic neuronal loss in certain disease states such as neurodegenerative diseases. Staurosporine (ST), a nonselective protein kinase inhibitor, has been shown to induce apoptosis in a variety of cells including nerve cell lines. In this study, we investigated the neuroprotective effect of sauchinone, which is a unique lignan from Saururus chinensis, on ST-induced apoptosis in C6 rat glioma cells. Sauchinone attenuated ST-induced apoptosis of C6 glioma cells as evidenced by DNA fragmentation. We also provide evidence that the inhibitory effect of sauchinone on ST-induced apoptosis involves a dose-dependent upregulation of an antiapoptotic protein, Bcl-2. Mounting evidence shows that the activation of caspases, especially caspase-3, triggers the apoptotic process. The activity of caspase-3 of ST-pretreated cells was significantly decreased upon sauchinone treatment in a dose-dependent manner. Taken together, the data demonstrate that sauchinone protects C6 glioma cells from ST-induced apoptosis in a caspase-3 dependent manner. Our findings may be critical for developing a strategy to protect nerve cells from apoptosis, suggesting the potential development of sauchinone as a neuroprotective agent.
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Affiliation(s)
- Hyun Song
- College of Pharmacy, Duksung Women's University, Seoul, Korea
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