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Cordoba-Chacon J, Sugasini D, Yalagala PCR, Tummala A, White ZC, Nagao T, Kineman RD, Subbaiah PV. Tissue-dependent effects of cis-9,trans-11- and trans-10,cis-12-CLA isomers on glucose and lipid metabolism in adult male mice. J Nutr Biochem 2019; 67:90-100. [PMID: 30856468 DOI: 10.1016/j.jnutbio.2019.01.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/22/2018] [Accepted: 01/29/2019] [Indexed: 12/22/2022]
Abstract
Mixtures of the two major conjugated linoleic acid (CLA) isomers trans-10,cis-12-CLA and cis-9,trans-11-CLA are used as over the counter supplements for weight loss. Because of the reported adverse effects of CLA on insulin sensitivity in some mouse studies, we sought to compare the impact of dietary t10c12-CLA and c9t11-CLA on liver, adipose tissue, and systemic metabolism of adult lean mice. We fed 8 week-old C57Bl/6J male mice with low fat diets (10.5% Kcal from fat) containing 0.8% t10c12-CLA or c9t11-CLA for 9 or 38 days. Diets containing c9t11-CLA had minimal impact on the endpoints studied. However, 7 days after starting the t10c12-CLA diet, we observed a dramatic reduction in fat mass measured by NMR spectroscopy, which interestingly rebounded by 38 days. This rebound was apparently due to a massive accumulation of lipids in the liver, because adipose tissue depots were visually undetectable. Hepatic steatosis and the disappearance of adipose tissue after t10c12-CLA feeding was associated with elevated plasma insulin levels and insulin resistance, compared to mice fed a control diet or c9t11-CLA diet. Unexpectedly, despite being insulin resistant, mice fed t10c12-CLA had normal levels of blood glucose, without signs of impaired glucose clearance. Hepatic gene expression and fatty acid composition suggested enhanced hepatic de novo lipogenesis without an increase in expression of gluconeogenic genes. These data indicate that dietary t10c12-CLA may alter hepatic glucose and lipid metabolism indirectly, in response to the loss of adipose tissue in mice fed a low fat diet.
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Affiliation(s)
- Jose Cordoba-Chacon
- Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Illinois at Chicago, Chicago, IL.
| | - Dhavamani Sugasini
- Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Illinois at Chicago, Chicago, IL
| | - Poorna C R Yalagala
- Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Illinois at Chicago, Chicago, IL
| | - Apoorva Tummala
- Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Illinois at Chicago, Chicago, IL
| | - Zachary C White
- Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Illinois at Chicago, Chicago, IL
| | - Toshihiro Nagao
- Osaka Research Institute of Industrial Science and Technology, Osaka, Japan
| | - Rhonda D Kineman
- Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Illinois at Chicago, Chicago, IL; Research and Development Division, Jesse Brown Veterans Affairs Medical Center, Chicago, IL
| | - Papasani V Subbaiah
- Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Illinois at Chicago, Chicago, IL; Research and Development Division, Jesse Brown Veterans Affairs Medical Center, Chicago, IL.
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Matencio A, Hernández-Gil CJG, García-Carmona F, López-Nicolás JM. Physicochemical, thermal and computational study of the encapsulation of rumenic acid by natural and modified cyclodextrins. Food Chem 2017; 216:289-95. [DOI: 10.1016/j.foodchem.2016.08.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 08/06/2016] [Accepted: 08/08/2016] [Indexed: 12/12/2022]
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Zhang HW, Zhang T, Shen BZ, Liu M, Liu JR. Toxicological insight from AP-1 silencing study on proliferation, migration, and dedifferentiation of rat vascular smooth muscle cell. Cardiovasc Toxicol 2012; 12:25-38. [PMID: 21818553 DOI: 10.1007/s12012-011-9135-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
There has an effective way to prevent intimal hyperplasia on vascular smooth muscle cell (VSMC) proliferation in grafted veins. The activator protein-1 (AP-1) transcription factor plays an important role in cardiovascular generation and angioplasty. Once activated, AP-1 binds its specific DNA sequence to promote the proliferation of VSMC, differentiation, and migration. The objectives of this study were to determine toxicological effects of AP-1 silencing study on proliferation, migration, and dedifferentiation of rat vascular smooth muscle cell. To suppress the expression of AP-1 gene, AP-1 siRNA was used to interfere post-transcription in rat primary VSMCs. To observe the expression of SM α-actin and downstream genes of AP-1, the activity of cell matrix metal proteinases and the migration ability of VSMC was examined by a modified Boyden chamber assay. Effects of AP-1 siRNA on proliferation and differentiation in rat VSMCs were evaluated by cell cycle analysis, DNA synthesis, MTT-test, and immunofluorescence. The results showed that the level of SM α-actin protein expression was increased. AP-1 siRNA also significantly decreased the MTT extinction value, DNA synthesis, PCNA expression, and the cell migration velocity when compared to the control group. AP-1 siRNA also clearly arrested cell cycle of VSM at the G0/G1 phase. Zymographic and Western blotting analyses showed that AP-1 siRNA suppressed serum-induced MMP-2 expression. These data suggest that the AP-1 siRNA was able to effectively inhibit the proliferation, migration, and dedifferentiation of smooth muscle cells. Thus, AP-1 siRNA provides a novel method to prevent intimal hyperplasia in blood vessel angioplasty.
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Affiliation(s)
- Hong-Wei Zhang
- Treatment Center of Oncology, The Fourth Affiliated Hospital of Harbin Medical University, NanGang District, Harbin, The People's Republic of China
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Schneider AC, Beguin P, Bourez S, Perfield JW, Mignolet E, Debier C, Schneider YJ, Larondelle Y. Conversion of t11t13 CLA into c9t11 CLA in Caco-2 cells and inhibition by sterculic oil. PLoS One 2012; 7:e32824. [PMID: 22427892 PMCID: PMC3299700 DOI: 10.1371/journal.pone.0032824] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 02/06/2012] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Conjugated linoleic acids (CLA), and principally c9t11 CLA, are suspected to have numerous preventive properties regarding non-infectious pathologies such as inflammatory diseases, atherosclerosis and several types of cancer. C9t11 CLA is produced in the rumen during biohydrogenation of linoleic acid, but can also be synthesized in mammalian tissues from trans-vaccenic acid (C18:1 t11) through the action of delta-9 desaturase (D9D). For several years, it is also known that c9t11 CLA can be synthesized from conjugated linolenic acids (CLnA), i.e. c9t11c13 CLnA and c9t11t13 CLnA. This study aimed at investigating to which extent and by which route c9t11 CLA can be produced from another isomer of CLA, the t11t13 CLA that is structurally very similar to c9t11t13 CLnA, in Caco-2 cells. METHODOLOGY/PRINCIPAL FINDINGS Caco-2 cells were incubated for 24 h with 20 µmol/l of t11t13 CLA in the absence or presence of sterculic oil used as an inhibitor of D9D. Caco-2 cells were able to convert t11t13 CLA into c9t11 CLA, and c9t11t13 CLnA was formed as an intermediate compound. In the presence of sterculic oil, the production of this intermediate was decreased by 46% and the formation of c9t11 CLA was decreased by 26%. No other metabolite was detected. CONCLUSIONS/SIGNIFICANCE These results not only highlight the conversion of t11t13 CLA into c9t11 CLA but demonstrate also that this conversion involves first a desaturation step catalysed by D9D to produce c9t11t13 CLnA and then the action of another enzyme reducing the double bond on the Δ13 position.
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Affiliation(s)
| | - Pauline Beguin
- Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Sophie Bourez
- Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - James W. Perfield
- University of Missouri, Columbia, Missouri, United States of America
| | - Eric Mignolet
- Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Cathy Debier
- Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Yves-Jacques Schneider
- Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Yvan Larondelle
- Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Linoleic acid enhances angiogenesis through suppression of angiostatin induced by plasminogen activator inhibitor 1. Br J Cancer 2011; 105:1750-8. [PMID: 22015554 PMCID: PMC3242595 DOI: 10.1038/bjc.2011.434] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background: The intake of dietary fatty acids is highly correlated with the risk of various cancers. Linoleic acid (LA) is the most abundant polyunsaturated fat in the western diet, but the mechanism(s) by fatty acids such as LA modulate cancer cells is unclear. In this study, we examined the role of LA in various steps in gastric cancer progression. Methods: The difference in gene expression between LA-treated and untreated OCUM-2MD3 gastric carcinoma cells was examined by mRNA differential display. The involvement of candidate genes was examined by oligo- and plasmid-mediated RNA interference. Biological functions of several of these genes were examined using in vitro assays for invasion, angiogenesis, apoptosis, cell viability, and matrix digestion. Angiogenesis in vivo was measured by CD-31 immunohistochemistry and microvessel density scoring. Results: LA enhanced the plasminogen activator inhibitor 1 (PAI-1) mRNA and protein expression, which are controlled by PAI-1 mRNA-binding protein. LA-stimulated invasion depended on PAI-1. LA also enhanced angiogenesis by suppression of angiostatin, also through PAI-1. LA did not alter cell growth in culture, but increased dietary LA-enhanced tumour growth in an animal model. Conclusion: Our findings suggest that dietary LA impacts multiple steps in cancer invasion and angiogenesis, and that reducing LA in the diet may help slow cancer progression.
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Li S, Wei J, Yuan L, Sun H, Liu Y, Zhang Y, Li J, Liu X. RGD-modified endostatin peptide 30 derived from endostatin suppresses invasion and migration of HepG2 cells through the αvβ3 pathway. Cancer Biother Radiopharm 2011; 26:529-38. [PMID: 21834652 DOI: 10.1089/cbr.2011.0978] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The nucleotide sequence encoding amino acids 1-30 of endostatin (peptide 30, with amino acids 25-31 mutated from RGIRGAD to RGDRGD) was artificially synthesized and cloned into the plasmid pTYB2 and expressed in Escherichia coli (DE3). Peptide 30 was purified by chitin affinity chromatography followed by dithiothreitol removal by gel filtration and protein identification using Tricine-sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Similarly, peptide 27, corresponding to amino acids 1-27 of endostatin, was produced as control. The effects of peptide 30 on the metastatic potential of HepG2 cells were then investigated. Peptide 30 was found to effectively suppress the adhesion, invasion, and migration of HepG2 cells. Flow cytometry demonstrated that peptide 30 did not alter the expression of membrane integrin αvβ3, although immunofluorescent staining revealed that these integrins formed clusters on the cell surface. Therefore, the effects of peptide 30 on cancer cell invasion may involve the αvβ3 pathway. Moreover, peptide 30 inactivated metalloproteinase-2 (MMP-2) and MMP-9 and downregulated the expression of COX-2 (cyclooxygenase 2), MMP-2, and MMP-9 at both mRNA and protein levels. Peptide 30 also upregulated the expression of tissue inhibitor of metalloproteinase-1 and tissue inhibitor of metalloproteinase-2 at mRNA and protein levels. Lastly, an antibody against αvβ3 enhanced the biological effects of peptide 30.
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Affiliation(s)
- Shuyan Li
- Department of Biochemistry and Molecular Biology, Harbin Medical University, No. 194 Baojian Road, Harbin, China
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Li Y, Sun WG, Liu HK, Qi GY, Wang Q, Sun XR, Chen BQ, Liu JR. γ-Tocotrienol inhibits angiogenesis of human umbilical vein endothelial cell induced by cancer cell. J Nutr Biochem 2011; 22:1127-36. [PMID: 21292465 DOI: 10.1016/j.jnutbio.2010.09.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2010] [Revised: 09/20/2010] [Accepted: 09/22/2010] [Indexed: 01/12/2023]
Abstract
Antiangiogenic therapy mediated by food components is an established strategy for cancer chemoprevention. Growth factors play critical roles in tumor angiogenesis. A conditioned medium containing growth factors from human gastric adenocarcinoma SGC-7901 cell conditioned medium was used as an angiogenic stimulus in this study. The purpose of this study was to evaluate the inhibitory effect and possible mechanism of γ-tocotrienol on tumor angiogenesis. The results showed that γ-tocotrienol (10-40 μmol/L) significantly suppressed proliferation, migration and tube formation of human umbilical vein endothelial cells (HUVECs) induced by SGC-7901 cell conditioned medium in a dose-dependent manner. γ-Tocotrienol (800-1200 μg/egg) also inhibited new blood vessel formation on the growing chick embryo chorioallantoic membrane in a dose-dependent manner. Moreover, the inhibitory effects of γ-tocotrienol on HUVECs were correlated with inducing the apoptosis and arresting cell cycle at the G(0)/G(1) phase at a dose of 40 μmol/L γ-tocotrienol. In addition, γ-tocotrienol inhibited angiogenesis in HUVECs by down-regulation of β-catenin, cyclin D1, CD44, phospho-VEGFR-2 and MMP-9. The antiangiogenic effects of γ-tocotrienol on HUVECs may be attributable to regulation of Wnt signaling by decreasing β-catenin expression. Thus, our results suggest that γ-tocotrienol has a potential chemopreventive agent via antiangiogenesis.
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Affiliation(s)
- Yang Li
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, Harbin 150081, People's Republic of China.
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Bi S, Liu JR, Li Y, Wang Q, Liu HK, Yan YG, Chen BQ, Sun WG. gamma-Tocotrienol modulates the paracrine secretion of VEGF induced by cobalt(II) chloride via ERK signaling pathway in gastric adenocarcinoma SGC-7901 cell line. Toxicology 2010; 274:27-33. [PMID: 20452389 DOI: 10.1016/j.tox.2010.05.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 05/02/2010] [Accepted: 05/04/2010] [Indexed: 11/26/2022]
Abstract
Hypoxia is a common characteristic feature of solid tumors, and carcinoma cells are known to secrete many growth factors. These growth factors, such as vascular endothelial growth factor (VEGF), play a major role in the regulation of tumor angiogenesis and metastasis. In this study, the effect of gamma-tocotrienol, a natural product commonly found in palm oil and rice bran, on the accumulation of HIF-1alpha protein and the paracrine secretion of VEGF in human gastric adenocarcinoma SGC-7901 cell line induced by cobalt(II) chloride (as a hypoxia mimic) was investigated. These results showed that cobalt(II) chloride induced the high expression of VEGF in SGC-7901 cells at dose of 150 micromol/L for 24h. Both basal level and cobalt(II) chloride-induced HIF-1alpha protein accumulation and VEGF paracrine secretion were inhibited in SGC-7901 cells treated with gamma-tocotrienol at 60 micromol/L treatment for 24 h. U0126, a MEK1/2 inhibitor, decreased the expression of HIF-1alpha protein and the paracrine secretion of VEGF under normoxic and hypoxic conditions. In this study, gamma-tocotrienol also significantly inhibited the hypoxia-stimulated expression of phosphorylated extracellular signal-regulated kinase 1/2 (p-ERK1/2). The mechanism seems to involve in inhibiting hypoxia-mediated activation of p-ERK1/2, it leads to a marked decrease in hypoxia-induced HIF-1alpha protein accumulation and VEGF secretion. These data suggest that HIF-1alpha/VEGF could be a promising target for gamma-tocotrienol in an effective method of chemoprevention and chemotherapy in human gastric cancer.
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Affiliation(s)
- Sheng Bi
- Central Laboratory, The First Affiliated Hospital of Harbin Medical University, 23 YouZheng Street, NanGang District, Harbin 150001, People's Republic of China
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Hornebeck W, Bellon G, Emonard H. Fibronectin type II (FnII)-like modules regulate gelatinase A activity. ACTA ACUST UNITED AC 2005; 53:405-10. [PMID: 16085117 DOI: 10.1016/j.patbio.2004.12.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2004] [Accepted: 12/07/2004] [Indexed: 11/25/2022]
Abstract
Gelatinase A, a member of the matrix metalloproteinase family, contains three fibronectin type II (FnII)-like modules that are inserted within its catalytic domain. These FnII modules, defined as exosites, play an essential role in targeting the enzyme to matrix macromolecules, a process which can down-regulate membrane-type metalloproteinase-driven progelatinase A activation. The exosite/substrate-directed gelatinase inhibitors has been proposed as an alternative approach to disappointing active site-directed inhibitors, to control gelatinase A activity. In preliminary experiments, we evidenced that long-chain unsaturated fatty acids could bind preferentially to the first FnII module of gelatinase A. This interaction inhibits the activity of this enzyme towards proteins (type I gelatin and collagen) and an octapeptide substrate, with K(i) in the micromolar range. Since gelatinase A-catalyzed matrix proteolysis might display a positive or negative influence (depending on the substrate cleaved), the design of exosite-specific compounds for noncatalytic targeting of gelatinase A would necessitate an extensive degradomic analysis.
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Affiliation(s)
- W Hornebeck
- Laboratoire de Biochimie, CNRS UMR 6198, IFR 53 Biomolécules, Université de Reims-Champagne, Reims, France.
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Cusack S, Jewell C, Cashman KD. The effect of conjugated linoleic acid on the viability and metabolism of human osteoblast-like cells. Prostaglandins Leukot Essent Fatty Acids 2005; 72:29-39. [PMID: 15589397 DOI: 10.1016/j.plefa.2004.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2004] [Accepted: 09/07/2004] [Indexed: 11/18/2022]
Abstract
Studies in experimental animals and murine osteoblast cells in culture have produced conflicting findings on the effect of conjugated linoleic acid (CLA) on bone formation. The present study investigated the influence of CLA on viability and metabolism of two human osteoblast-like cell lines (SaOS2 and MG63). Both cell lines were exposed to increasing concentrations (0-50 microM) of CLA either as pure cis (c) 9: trans (t) 11 and t10:c12 CLA isomers or a blend of isomers, or linoleic acid (C18:2). Cell cytotoxicity and degree of DNA fragmentation were unaffected by any fatty acid treatment. PGE2 biosynthesis by both cell lines was variably reduced by CLA isomer blend and t10:c12 CLA, but not c9:t11 CLA. Alkaline phosphatase activity was variably increased by all CLA treatments. These results suggest a lack of cytotoxic effect of CLA on human osteoblast-like cells and tentatively suggest a possible beneficial effect on bone formation in humans.
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Affiliation(s)
- S Cusack
- Department of Food and Nutritional Sciences, University College, Western Road, Cork, Ireland
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Xu L, Sun DZ, He J, Liu L, Wei PK. Expression of tumor metastasis-related gene protein in the same syndromic classification of gastric carcinoma on traditional Chinese medicine. Shijie Huaren Xiaohua Zazhi 2004; 12:2782-2787. [DOI: 10.11569/wcjd.v12.i12.2782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To explore the entity of gastric carcinoma under the same syndromic classification based on traditional Chinese medicine from the angle of gene protein expression.
METHODS: Patients with gastric carcinoma were collected and then classified before operation according to dialectic criterion of traditional Chinese medicine. Samples of gastric carcinoma from all the patient were collected after operation. EnVision two step immuhistochemical method was used to observe the expession of E-cadherin, C-erbB-2, P53, nm23, ICAM-1, VEGF, KDR, MMP-2, TIMP-2 in the cancerous samples.
RESULTS: The preceding 9 gene proteins were differently expressed in each type. There was significant difference (P = 0.0 001 < 0.01) in the expression of the 9 gene proteins between different syndromic types. Several genes had different expression in the same syndromic type. The rates of VEGF, E-cad, nm23 expression were higher (94%, 90% and 92% respectively) than other proteins. E-cad expression in the stagnation of phlegm-damp type is the highest expression (average rank = 63.09). E-cad expression was lower in the types of the stasis and endogenous toxics and the discordance of liver-stomach.
CONCLUSION: Metastasis of gastric carcinoma in the types of the stasis and endogenous toxics and the discordance of liver-stomach may relate to the loss of E-cadherin expression. However, both cancer gene and anti-oncogene are expressed at a high level in the two types.
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Affiliation(s)
- Ling Xu
- Pin-kang Wei, Department of Traditional Chinese Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Da-Zhi Sun
- Pin-kang Wei, Department of Traditional Chinese Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Jin He
- Department of Pathology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Long Liu
- Pin-kang Wei, Department of Traditional Chinese Medicine, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
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N/A. N/A. Shijie Huaren Xiaohua Zazhi 2004; 12:2192-2195. [DOI: 10.11569/wcjd.v12.i9.2192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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