15 results on '"Zang, Xiao-Ping"'
Search Results
2. Abstracts from Japanese journal of hygiene (nihon eiseigaku zasshi) Vol.54 No.2
- Author
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Takeshita, Tatsuya, Tanii, Hideji, Zang, Xiao-Ping, Saijoh, Kiyofumi, Fujita, Yasuyuki, Kodama, Kazunori, Kasagi, Fumiyoshi, Fujita, Shoichiro, Kishimoto, Masumi, Tanihara, Shinichi, Ojima, Toshiyuki, Oki, Izumi, Nakamura, Yosikazu, Yanagawa, Hiroshi, Nose, Takayuki, Momose, Yoshito, Kaetsu, Akihiko, Ishii, Toshiya, Shibata, Kazunori, Miyazaki, Motonobu, Moriyama, Masaki, Une, Hiroshi, Katakura, Michihiro, Sugawara, Naoki, and Miyai, Masaya
- Published
- 1999
- Full Text
- View/download PDF
3. Selective Growth Inhibition of Cancer Cells by L-Methioninase-Containing Fusion Protein Targeted to the Urokinase Receptor
- Author
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Palwai, Naveen R., Zang, Xiao-Ping, Harrison, Roger G., Benbrook, Doris, and Pento, J. Thomas
- Subjects
Carbon-Sulfur Lyases ,Drug Delivery Systems ,Dose-Response Relationship, Drug ,Cell Movement ,Cell Survival ,Short Communication ,Cell Line, Tumor ,Recombinant Fusion Proteins ,Mutation ,Humans ,Antineoplastic Agents ,Cell Proliferation ,Receptors, Urokinase Plasminogen Activator - Abstract
We have reported the development of a novel fusion protein (FP) consisting of an amino-terminal fragment of urokinase linked to the amino terminus of the enzyme L-methioninase (L-M). The present study compared the effect of this novel FP on the proliferation of human ovarian, skin, breast endometrial and pancreatic cancer cell lines.The FP, L-M and a mutated FP, with reduced L-M activity, were produced by recombinant methods. The effect of treatment with FP, L-M and mutated FP on the proliferation of the cancer cells was measured in vitro using an MTS assay.The inhibitory effect of the FP was found to be significantly greater than that of L-M alone or the mutated FP. In addition, the FP produced a greater inhibitory effect on an ovarian cancer cell line than on comparable normal, non-cancerous cells. Further, the FP produced a dose-dependent inhibition of the proliferation of pancreatic cancer cell lines.These results suggest that this FP is a potent and selective inhibitor of the proliferation of various cancer cell lines and has potential as a therapeutic agent for the treatment of various methionine-dependent cancers.
- Published
- 2009
4. Changes in endogenous hormone concentrations during inflorescence induction and development in pineapple (Ananas comosus cv. Smooth Cayenne) by ethephon
- Author
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Liu, Sheng hui, primary, Zang, Xiao ping, additional, and Sun, Guang ming, additional
- Published
- 2011
- Full Text
- View/download PDF
5. Abstracts from Japanese journal of hygiene(nihon eiseigaku zasshi) Vol.54 No.2
- Author
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Takeshita, Tatsuya, primary, Tanii, Hideji, additional, Zang, Xiao-Ping, additional, Saijoh, Kiyofumi, additional, Fujita, Yasuyuki, additional, Kodama, Kazunori, additional, Kasagi, Fumiyoshi, additional, Fujita, Shoichiro, additional, Kishimoto, Masumi, additional, Tanihara, Shinichi, additional, Ojima, Toshiyuki, additional, Oki, Izumi, additional, Nakamura, Yosikazu, additional, Yanagawa, Hiroshi, additional, Nose, Takayuki, additional, Momose, Yoshito, additional, Kaetsu, Akihiko, additional, Ishii, Toshiya, additional, Shibata, Kazunori, additional, Miyazaki, Motonobu, additional, Moriyama, Masaki, additional, Une, Hiroshi, additional, Katakura, Michihiro, additional, Sugawara, Naoki, additional, and Miyai, Masaya, additional
- Published
- 1999
- Full Text
- View/download PDF
6. Influence of novel KGFR tyrosine kinase inhibitors on KGF-mediated proliferation of breast cancer.
- Author
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Mehta M, Kesinger JW, Zang XP, Lerner ML, Brackett DJ, Brueggemeier RW, Li PK, and Pento JT
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- Breast Neoplasms pathology, Cell Growth Processes drug effects, Cell Growth Processes physiology, Cell Line, Tumor, Extracellular Signal-Regulated MAP Kinases metabolism, Female, Fibroblast Growth Factor 7 pharmacology, Humans, Indoles pharmacology, MAP Kinase Signaling System drug effects, Quinolones pharmacology, Receptor, Fibroblast Growth Factor, Type 2 metabolism, Breast Neoplasms drug therapy, Breast Neoplasms enzymology, Fibroblast Growth Factor 7 antagonists & inhibitors, Protein Kinase Inhibitors pharmacology, Receptor, Fibroblast Growth Factor, Type 2 antagonists & inhibitors
- Abstract
Background: Keratinocyte growth factor (KGF) acts at the KGF receptor (KGFR) to produce a rapid stimulation of breast cancer cell proliferation and motility which is mediated via the Erk signaling pathway. Enhancement of KGF/KGFR signal transduction may be an early step in the metastatic progression of breast cancer. Receptor modeling of KGFR was used to identify selective KGFR tyrosine kinase (TK) inhibitor molecules that have the potential to bind selectively to the KGFR. The present study evaluated the biological activity of 57 of these KGFR TK inhibitor compounds on breast cancer cells., Materials and Methods: These compounds were tested for their ability to inhibit KGF-mediated breast cancer cell proliferation in MCF-7 breast cancer cells. Furthermore, the effects of the most effective proliferation inhibitors were examined on Erk signaling and on the relative density of cell membrane KGFR., Results: It was observed that 27 of the 57 compounds tested produced a 20% or greater reduction in KGF-mediated proliferation; while five compounds produced greater than 50% inhibition. In addition, the most potent inhibitors also reduced Erk signaling and cell membrane density of the KGFR., Conclusion: The compounds examined appear to be selective KGFR inhibitors which inhibit KGF-mediated activity and reduce the expression of KGFR on cancer cells. These results may lead to the development of a novel class of anticancer agents for the prevention of metastatic cancer progression.
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- 2010
7. Influence of KGF on the progression of pancreatic cancer.
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Zang XP, Lerner M, Brackett D, and Pento JT
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- Cell Adhesion, Humans, Immunoenzyme Techniques, Pancreatic Neoplasms metabolism, Receptor, Fibroblast Growth Factor, Type 2 metabolism, Tumor Cells, Cultured, Cell Movement, Cell Proliferation, Fibroblast Growth Factor 7 pharmacology, Pancreatic Neoplasms pathology
- Abstract
Background: Keratinocyte growth factor (KGF increases the proliferation and motility of many epithelial cells and is known to be up-regulated in pancreatic cancer. The present study examined the hypothesis that KGF may initiate or enhance the progression of pancreatic cancer by increasing the proliferation and motility of pancreatic cancer cells., Materials and Methods: HPAF-II pancreatic cancer cell migration and proliferation was evaluated using a culture wounding assay 24 and 48 hours following KGF treatment. KGF receptor (KGFR) localization in these cells was established by immunohistochemistry., Results: KGF treatment significantly increased the proliferation and motility of the HPAF-II cells. In addition, KGF enhanced the motile morphology of these cancer cells., Conclusion: The results of this study indicate that KGF has a rapid influence on the proliferation and motility of HPAF-II cells and suggest that KGF may be involved in the progression of pancreatic cancer.
- Published
- 2009
8. SiRNA inhibition of ER-alpha expression reduces KGF-induced proliferation of breast cancer cells.
- Author
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Zang XP and Pento JT
- Subjects
- Breast Neoplasms metabolism, Breast Neoplasms pathology, Cell Growth Processes drug effects, Cell Growth Processes genetics, Cell Line, Tumor, Estrogen Receptor alpha biosynthesis, Estrogen Receptor alpha genetics, Fibroblast Growth Factor 7 antagonists & inhibitors, Humans, Transfection, Breast Neoplasms genetics, Estrogen Receptor alpha antagonists & inhibitors, Fibroblast Growth Factor 7 pharmacology, RNA, Small Interfering genetics
- Abstract
Background: Keratinocyte growth factor (KGF) produces a rapid increase in the proliferation and motility of estrogen receptor (ER)-positive breast cancer cells which is abolished by estrogen deprivation and/or anti-estrogen treatment. The present study examined the hypothesis that ER-alpha is involved in the KGF proliferation in MCF-7 cancer cells using small interfering RNA (siRNA) to selectively inhibit ER-alpha expression., Materials and Methods: At 48 hours following ER-alpha siRNA transfection, the MCF-7 cells were treated with KGF (50 ng/ml) or vehicle for 24 hours. Cell proliferation was measured using a MTT assay. ER-alpha protein levels were quantified by Western blotting., Results: ER-alpha siRNA transfection significantly reduced ER-alpha expression and MCF-7 cell proliferation. KGF-mediated enhancement of cell proliferation and motile cell morphology were reduced or absent in the siRNA transfected MCF-7 cells., Conclusion: ER-alpha expression is associated with KGF-induced proliferation of breast cancer cells.
- Published
- 2008
9. Wilms' tumor 1 protein and focal adhesion kinase mediate keratinocyte growth factor signaling in breast cancer cells.
- Author
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Zang XP, Pento JT, and Tari AM
- Subjects
- Breast Neoplasms enzymology, Breast Neoplasms pathology, Cell Cycle Proteins, Cell Line, Tumor, Cell Movement physiology, Down-Regulation, Enzyme Activation, Fibroblast Growth Factor 7 antagonists & inhibitors, Fibroblast Growth Factor 7 pharmacology, Focal Adhesion Protein-Tyrosine Kinases biosynthesis, GRB2 Adaptor Protein biosynthesis, Humans, Mitogen-Activated Protein Kinase 1 metabolism, Mitogen-Activated Protein Kinase 3 metabolism, Nuclear Proteins biosynthesis, Phosphorylation, RNA Splicing Factors, Recombinant Proteins pharmacology, Signal Transduction, Breast Neoplasms metabolism, Fibroblast Growth Factor 7 metabolism, Focal Adhesion Protein-Tyrosine Kinases metabolism, Nuclear Proteins metabolism
- Abstract
Background: Keratinocyte growth factor (KGF) has been shown to induce breast cancer metastasis in animal models. cDNA microarrays have revealed that KGF increased Wilms tumor 1 (WT1) and focal adhesion kinase (FAK) expression in breast cancer cells. The role of WT1 and FAK in KGF signaling was investigated., Materials and Methods: A cell culture wounding model was used to study the effects of WT1 and FAK down-regulation on KGF-induced proliferation and motility in breast cancer cells., Results: WT1 down-regulation inhibited KGF-mediated proliferation and motility of breast cancer cells, while FAK down-regulation inhibited proliferation, but had no significant effect on cell motility. WT1 down-regulation, but not FAK down-regulation, led to Erk1,2 inactivation., Conclusion: KGF-mediated signaling employs WT1 and FAK to regulate breast cancer cell proliferation and motility and may represent therapeutic targets for the prevention of breast cancer progression.
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- 2008
10. Development of keratinocyte growth factor receptor tyrosine kinase inhibitors for the treatment of cancer.
- Author
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Hackett J, Xiao Z, Zang XP, Lerner ML, Brackett DJ, Brueggemeier RW, Li PK, and Pento JT
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- Breast Neoplasms enzymology, Breast Neoplasms pathology, Cell Growth Processes drug effects, Cell Line, Tumor, Cell Movement drug effects, Drug Design, Humans, Immunohistochemistry, Quinolones chemical synthesis, Quinolones pharmacology, Breast Neoplasms drug therapy, Protein Kinase Inhibitors chemical synthesis, Protein Kinase Inhibitors pharmacology, Receptor, Fibroblast Growth Factor, Type 2 antagonists & inhibitors
- Abstract
Background: The mammary glands of adult female animals are remarkably sensitive to keratinocyte growth factor (KGF). KGF acts at the KGF receptor (KGFR) to produce a rapid and profound stimulation of breast cancer cell proliferation and motility. Further, KGF-induced motility in breast cancer cells is mediated via the Erk1/2 signaling pathway. Thus, enhancement of KGF/KGFR signal transduction may be an early step in the metastatic progression of breast cancer. Receptor modeling of KGFR was used to identify selective KGFR tyrosine kinase inhibitor (TKI) molecules with high receptor affinity. The present study describes the synthesis and biological activity of three of the KGFR TKI compounds., Materials and Methods: Computer modeling of the KGFR was used to create a virtual library of compounds that have the potential to bind with high affinity to the KGFR. Three of these compounds were synthesized and tested in this study. The compounds were tested for their ability to inhibit KGF-mediated breast cancer cell proliferation and motility using a culture wounding assay. In addition, the effect of the most potent KGFR TKI compound on the relative density of cell membrane KGFR was measured using immunocytochemistry., Results: It was observed that the KGFR TKIs decreased KGF-mediated activity as predicted by computer modeling. In addition, the most potent inhibitor also reduced the density of the KGFR on the membrane of the cancer cells., Conclusion: The novel inhibitors identified in this project are selective KGFR inhibitors which appear to reduce the expression of KGFR on cancer cells. These results may lead to the development of a novel class of anticancer agents for the chemoprevention of metastatic cancer development and provide a new approach in the treatment of breast cancer.
- Published
- 2007
11. Influence of L-methioninase targeted to the urokinase receptor on the proliferation and motility of lung and prostate cancer cells.
- Author
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Palwai NR, Zang XP, Harrison RG, and Pento JT
- Subjects
- Carbon-Sulfur Lyases genetics, Cell Growth Processes drug effects, Cell Growth Processes physiology, Cell Line, Tumor, Cell Movement drug effects, Cell Movement physiology, Drug Delivery Systems, Humans, Lung Neoplasms metabolism, Male, Mutation, Peptide Fragments genetics, Peptide Fragments pharmacology, Prostatic Neoplasms metabolism, Receptors, Cell Surface genetics, Receptors, Urokinase Plasminogen Activator, Recombinant Fusion Proteins genetics, Carbon-Sulfur Lyases pharmacology, Lung Neoplasms drug therapy, Lung Neoplasms pathology, Prostatic Neoplasms drug therapy, Prostatic Neoplasms pathology, Receptors, Cell Surface metabolism, Recombinant Fusion Proteins pharmacology
- Abstract
Background: Previously, we reported that a novel fusion protein consisting of an amino-terminal fragment of urokinase linked to the amino terminus of the enzyme L-methioninase inhibited MCF-7 breast cancer cells in vitro to a greater extent than treatment with L-methioninase., Materials and Methods: The fusion protein, L-methioninase and a mutated fusion protein without L-methioninase activity were produced by recombinant methods. The effects of fusion protein, L-methioninase, and mutated fusion protein treatment on the proliferation and motility of SK-LU-i lung and PC-3 prostate and cancer cells were measured in vitro using a culture wounding assay., Results: The fusion protein produced a dose-dependent inhibition of the proliferation and motility of both cancer cell lines. In addition, the fusion protein was found to be significantly more effective than L-methioninase alone or mutated fusion protein., Conclusion: Our results suggest that this fusion protein has potential as a selective therapeutic agent for the treatment of various methionine-dependent cancers.
- Published
- 2007
12. A Comparison of KGF Receptor Expression in Various Types of Human Cancer.
- Author
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Zang XP, Lerner MR, Bahr SJ, Brackett DJ, and Pento JT
- Abstract
Background: Keratinocyte growth factor (KGF) has been observed to produce a rapid increase in the motility of breast cancer cells. KGF/KGFR (KGF receptor) signaling has also been demonstrated in the progression of many types of human cancer. The objective of the present study was to compare KGFR expression in various types of cancer., Materials and Methods: A cancer profiling array containing cDNA from 154 tumor and paired normal samples representing 19 types of human cancer was employed., Results: The results of the present study indicate that KGFR expression is enhanced in many types of human carcinomas at an early stage of cancer development, suggesting that KGFR overexpression may be an early signal in the progression of these cancers. However, the stage of cancer progression and relative level of expression varied considerably among the various types of cancer., Conclusion: These findings suggest that tumor KGFR levels may serve as a prognostic biomarker for cancer staging and/or treatment., (Copyright© 2006 International Institute of Anticaner Research (Dr. John G. Delinassios), All rights reserved.)
- Published
- 2006
13. Targeting a methioninase-containing fusion protein to breast cancer urokinase receptors inhibits growth and migration.
- Author
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Zang XP, Palwai NR, Lerner MR, Brackett DJ, Pento JT, and Harrison RG
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- Animals, Breast Neoplasms pathology, Carbon-Sulfur Lyases genetics, Cell Growth Processes drug effects, Cell Line, Tumor, Cell Movement drug effects, Humans, Injections, Intralesional, Mice, Mice, Nude, Mutagenesis, Site-Directed, Receptors, Cell Surface genetics, Receptors, Urokinase Plasminogen Activator, Recombinant Fusion Proteins biosynthesis, Recombinant Fusion Proteins genetics, Recombinant Fusion Proteins metabolism, Xenograft Model Antitumor Assays, Breast Neoplasms drug therapy, Breast Neoplasms metabolism, Carbon-Sulfur Lyases administration & dosage, Receptors, Cell Surface metabolism, Recombinant Fusion Proteins administration & dosage
- Abstract
Background: We previously reported that a novel fusion protein (consisting of an amino-terminal fragment of urokinase which binds to the urokinase receptor, and L-methioninase which depletes methionine and arrests the growth of methionine-dependent tumors) inhibited MCF-7 breast cancer cells in vitro., Materials and Methods: We produced this fusion protein, L-methioninase, and a mutated fusion protein without L-methioninase activity by recombinant methods. MCF-7 cell proliferation and mobility were measured in vitro in a culture wounding assay. Protein binding to MCF-7 cells was measured by immunocytochemical localization. MCF-7 tumor xenograft growth was measured in nude mice., Results: The fusion protein was significantly more effective than L-methioninase in either the in vitro or in vivo assays. The binding assay showed that the unmutated and mutated fusion protein bound to the cells, but L-methioninase did not., Conclusion: Our results suggest that this fusion protein has potential as a therapeutic agent for cancer treatment.
- Published
- 2006
14. Enhanced motility of KGF-transfected breast cancer cells.
- Author
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Zang XP, Bullen EC, Manjeshwar S, Jupe ER, Howard EW, and Pento JT
- Subjects
- Animals, Breast Neoplasms genetics, Breast Neoplasms metabolism, Cell Line, Tumor, Fibroblast Growth Factor 7 biosynthesis, Fibroblast Growth Factor 7 genetics, Fibroblast Growth Factor 7 metabolism, Humans, Mice, Mice, Nude, Neoplasm Transplantation, Transfection, Transplantation, Heterologous, Breast Neoplasms pathology, Cell Movement physiology, Fibroblast Growth Factor 7 physiology
- Abstract
Background: In a previous study, we reported that keratinocyte growth factor (KGF) produced a rapid increase in the motility of ER-positive breast cancer cells. Others have demonstrated that KGF treatment in rodent species produces rapid mammary ductal hyperplasia. Epithelial cells do not produce KGF; thus, in the present study, MCF-7 cells were stably transfected with a KGF-expressing vector and the motility and morphology of the transfected, non-transfected and empty vector cell lines compared., Materials and Methods: A mammalian expression vector containing a KGF cDNA was transfected into MCF-7/beta cells, and two stable clones (MCF-7/beta/KGF-T8 and MCF-7/beta/KGF-T9) were identified. Western blotting of conditioned medium from these clones was used to confirm the expression of KGF. The motility of wild-type and KGF-transfected MCF-7 cells was compared using time-lapse videomicroscopy and a cell culture wounding model which examined cell migration over a period of 1-3 days., Results: The Western blots demonstrated that the expression of KGF in both the MCF-7/beta/KGF-T8 and MCF-7/beta/KGF-T9 cell lines was higher than the wild-type and MCF-7/beta cell lines. The cell proliferation and migration distance was significantly greater for both KGF-transfected MCF-7 cell lines than the wild-type and MCF-7/beta cell lines under the same experimental conditions. Further, changes in motile morphology were observed in both the MCF-7/beta/KGF-T8 and MCF-7/beta/KGF-T9 cell lines. In addition, the MCF-7/beta/KGF-T8 clone was found to produce much larger tumors than both the MCF-7/beta/KGF-T9 and EV clones in mouse xenografts. These results indicated that autocrine production of KGF in the KGF-transfected MCF-7 cell lines enhanced cell migration, migration-related morphology and xenograft tumor growth., Conclusion: KGF-transfected MCF-7 cells displayed a much greater motility than non-transfected cells, confirming the KGF motility enhancement effect which we previously reported. The use of KGF-transfected breast cancer cells in the xenograft model may help to study the mechanism of KGF-mediated cell motility and to identify specific KGF antagonists that may be used to prevent or impede KGF-mediated metastatic progression.
- Published
- 2006
15. Keratinocyte Growth Factor-Mediated Pattern of Gene Expression in Breast Cancer Cells.
- Author
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Zang XP, Lerner ML, DO SV, Brackett DJ, and Pento JT
- Abstract
Background: Breast cancer metastasis is associated with the motility and invasiveness of breast cancer cells. In a previous study we reported the motility enhancement effect of keratinocyte growth factor (KGF) on breast cancer cells. This study established and characterized the influence of KGF on breast cancer cell motility and determined that KGF-induced motility was observed only in estrogen receptor-positive breast cancer cells. The objective of the present study was to identify genes involved in the KGF motility response in human breast cancer cells., Materials and Methods: Using cDNA expression assays, we compared the expression of mRNA in control and KGF-treated MCF-7 breast cancer cells. Scatter plots and cluster analysis of gene expression were used to determine KGF-mediated gene expression patterns., Results: It was determined that over 100 genes were up- or down-regulated from 3-100 fold at 1h following KGF treatment. We identified up-regulated and down-regulated target genes that are associated with some aspect of tumor progression, proliferation or metastasis., Conclusion: Knowledge of specific genes and patterns of gene regulation associated with KGF-enhanced cell motility may provide important new information concerning the mechanisms involved in tumor metastasis. In addition, these genes and/or protein products may serve as novel therapeutic targets or biomarkers of metastatic progression. The pattern gene of expression observed in this study provides new information on the molecular signature associated with the motility and metastatic progression of breast cancer., (Copyright© 2004 International Institute of Anticaner Research (Dr. John G. Delinassios), All rights reserved.)
- Published
- 2004
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