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Wei JY, Wang J, Liu W, Zhang KZ, Sun P. Short communication: Effects of different selenium supplements on rumen fermentation and apparent nutrient and selenium digestibility of mid-lactation dairy cows. J Dairy Sci 2019; 102:3131-3135. [PMID: 30738681 DOI: 10.3168/jds.2018-15455] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 12/11/2018] [Indexed: 12/31/2022]
Abstract
The aim of this study was to evaluate the dose-dependent effects of a hydroxy-analog of selenomethionine (HMSeBA) on rumen fermentation, apparent nutrient digestibility, and total selenium absorption in mid-lactation dairy cows, and to compare the effects with those of sodium selenite (SS). Fifty mid-lactation dairy cows with similar milk yields, days in milk, and parity were randomly assigned to 1 of 5 treatments according to a randomized complete block design. The cows were fed a basal diet containing 0.06 mg/kg dry matter (DM) of Se (control) or the same basal diet supplemented with SS, yielding 0.3 mg of Se/kg of DM (SS-0.3), or HMSeBA, yielding 0.1, 0.3, or 0.5 mg of Se/kg of DM (SO-0.1, SO-0.3, and SO-0.5, respectively), during the experimental period. The final content of Se in control, SS-0.3, SO-0.1, SO-0.3, and SO-0.5 was 0.06, 0.34, 0.15, 0.33, and 0.52 mg of Se/kg of DM. The experiment lasted for 10 wk, with a pretrial period of 2 wk. Supplementation with HMSeBA altered rumen fermentation by linearly increasing total volatile fatty acids and the molar proportions of propionate and butyrate but decreasing rumen pH, ammonia content, and the ratio of acetate to propionate. Compared with SS, HMSeBA enhanced the molar proportion of propionate in the rumen and the apparent digestibility of crude protein, neutral detergent fiber, acid detergent fiber, and selenium. We demonstrated that HMSeBA promoted rumen fermentation, apparent nutrient digestibility, and selenium absorption, implying that HMSeBA has a greater apparent absorption than SS.
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Affiliation(s)
- J Y Wei
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - J Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - W Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - K Z Zhang
- Beijing Sino Farm, Beijing, 100125, China
| | - P Sun
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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2
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Zhang JX, Qi MJ, Shi MZ, Chen JJ, Zhang XQ, Yang J, Zhang KZ, Han YL, Guo C. Effects of Danhong injection, a traditional Chinese medicine, on nine cytochrome P450 isoforms in vitro. Biomed Chromatogr 2018; 33:e4454. [PMID: 30520061 DOI: 10.1002/bmc.4454] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/23/2018] [Accepted: 11/29/2018] [Indexed: 01/03/2023]
Abstract
Danhong injection (DHI) is made from Salvia miltiorrhiza Bunge. and Carthamus tinctorius L. extract and is widely used in the clinical treatment of cardiovascular and cerebrovascular diseases. This study aimed to evaluate the effect of DHI on cytochrome P450 (CYP450) enzymes in vitro to predict drug-drug interactions based on CYP450 as combination therapy. To assess the inhibitory effect of DHI on CYP450, we detected the IC50 value of DHI on CYP450 in vitro by liquid chromatography/tandem mass spectrometry (LC-MS/MS). Simultaneously, the induction effect of DHI on CYP450s was also evaluated. The relative induction ratios of DHI on CYP1A2, CYP2B6 and CYP3A4 activity were calculated by LC-MS/MS. The expression level of CYP3A4 mRNA was determined by reverse transcription PCR (RT-PCR). The LC-MS/MS data showed DHI intensively inhibit CYP2A6 activity and the intensity of inhibition was followed by CYP2C8, CYP3A4, CYP2C19, CYP2B6, CYP2D6, CYP1A2, CYP2E1 and CYP2C9 in vitro. The results of RT-PCR showed that there is a certain induction of DHI on CYP3A4 mRNA in human primary hepatocytes in vitro. The study suggested that drug-drug interactions might occur in clinical co-administration of drugs owing to the CYP2A6 inhibition and CYP3A4 induction.
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Affiliation(s)
- Jing-Xian Zhang
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, P. R. China
| | - Mei-Juan Qi
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, P. R. China
| | - Mei-Zhi Shi
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, P. R. China
| | - Jun-Jun Chen
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, P. R. China
| | - Xiang-Qi Zhang
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, P. R. China
| | - Jiao Yang
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, P. R. China
| | - Ke-Zhi Zhang
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai, P. R. China.,KG Pharma Limited, Foshan, P. R. China
| | - Yong-Long Han
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, P. R. China
| | - Cheng Guo
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, P. R. China
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Chen JJ, Zhang JX, Zhang XQ, Qi MJ, Shi MZ, Yang J, Zhang KZ, Guo C, Han YL. Effects of diosmetin on nine cytochrome P450 isoforms, UGTs and three drug transporters in vitro. Toxicol Appl Pharmacol 2017; 334:1-7. [DOI: 10.1016/j.taap.2017.08.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 08/23/2017] [Accepted: 08/30/2017] [Indexed: 11/29/2022]
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Sun P, Wang J, Liu W, Bu DP, Liu SJ, Zhang KZ. Hydroxy-selenomethionine: A novel organic selenium source that improves antioxidant status and selenium concentrations in milk and plasma of mid-lactation dairy cows. J Dairy Sci 2017; 100:9602-9610. [PMID: 28987589 DOI: 10.3168/jds.2017-12610] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 08/02/2017] [Indexed: 12/24/2022]
Abstract
This study aimed to evaluate the effect of hydroxy-selenomethionine (HMSeBA), a novel organic selenium (Se) source, on milk performance, antioxidative status, and Se concentrations in the milk and plasma of mid-lactation dairy cows compared with that of sodium selenite (SS). Fifty mid-lactation dairy cows with similar days in milk, milk yield, and parity received the same basal diet containing 0.06 mg of Se/kg of DM. They were assigned to 1 of 5 treatments according to a randomized complete block design: negative control (without Se supplementation), SS supplementation (0.3 mg of Se/kg of DM; SS-0.3) or HMSeBA supplementation (0.1, 0.3, or 0.5 mg of Se/kg of DM: SO-0.1, SO-0.3, and SO-0.5, respectively). The experiment lasted for 10 wk, including a pretrial period of 2 wk. The results indicated that neither Se supplementation nor Se source affected dry matter intake, milk yield, milk composition, or blood biochemical parameters, except for milk fat percentage. Simultaneously, milk fat percentage and milk fat yield increased linearly as the quantity of HMSeBA supplementation was increased. Production of 4% FCM and ECM was elevated linearly as dietary HMSeBA increased. The SO-0.3 group showed higher serum activity of glutathione peroxidase, total antioxidant capacity, and superoxide dismutase than the SS-0.3 group, but malondialdehyde content was not affected by Se source. Furthermore, HMSeBA supplementation linearly increased the activities of serum glutathione peroxidase and superoxide dismutase, but decreased malondialdehyde content. Compared with the SS-0.3 group, the SO-0.3 group showed augmented concentrations of total Se in milk and plasma, and total Se milk-to-plasma concentration ratio. In addition, increasing doses of HMSeBA linearly increased the concentrations of total Se in the milk and plasma. This study demonstrates that HMSeBA improves antioxidant status and increases milk and plasma Se concentrations more effectively than SS, indicating that HMSeBA could replace SS as an effective organic Se source for lactating dairy cows.
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Affiliation(s)
- P Sun
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - J Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - W Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - D P Bu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China; Chinese Academy of Agricultural Sciences-World Agroforestry Center (CAAS-ICRAF) Joint Lab on Agroforestry and Sustainable Animal Husbandry, World Agroforestry Centre, East and Central Asia, 100081, Beijing; Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Hunan, 410128, China.
| | - S J Liu
- China Feed Industry Association, Beijing, 100125, China
| | - K Z Zhang
- Beijing Sino Farm, Beijing, 100028, China
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Ao JY, Zhu XD, Chai ZT, Cai H, Zhang YY, Zhang KZ, Kong LQ, Zhang N, Ye BG, Ma DN, Sun HC. Colony-Stimulating Factor 1 Receptor Blockade Inhibits Tumor Growth by Altering the Polarization of Tumor-Associated Macrophages in Hepatocellular Carcinoma. Mol Cancer Ther 2017; 16:1544-1554. [PMID: 28572167 DOI: 10.1158/1535-7163.mct-16-0866] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 03/23/2017] [Accepted: 05/19/2017] [Indexed: 11/16/2022]
Abstract
Colony-stimulating factor-1 (CSF-1) and its receptor, CSF-1R, regulate the differentiation and function of macrophages and play an important role in macrophage infiltration in the context of hepatocellular carcinoma. The therapeutic effects of CSF-1R blockade in hepatocellular carcinoma remain unclear. In this study, we found that CSF-1R blockade by PLX3397, a competitive inhibitor with high specificity for CSF-1R tyrosine kinase, significantly delayed tumor growth in mouse models. PLX3397 inhibited the proliferation of macrophages in vitro, but intratumoral macrophage infiltration was not decreased by PLX3397 in vivo Gene expression profiling of tumor-associated macrophages (TAM) showed that TAMs from the PLX3397-treated tumors were polarized toward an M1-like phenotype compared with those from vehicle-treated tumors. In addition, PLX3397 treatment increased CD8+ T-cell infiltration, whereas CD4+ T-cell infiltration was decreased. Further study revealed that tumor cell-derived CSF-2 protected TAMs from being depleted by PLX3397. In conclusion, CSF-1R blockade delayed tumor growth by shifting the polarization rather than the depletion of TAMs. CSF-1R blockade warrants further investigation in the treatment of hepatocellular carcinoma. Mol Cancer Ther; 16(8); 1544-54. ©2017 AACR.
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Affiliation(s)
- Jian-Yang Ao
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China.,Department of Hepatobiliary Surgery, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiao-Dong Zhu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
| | - Zong-Tao Chai
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
| | - Hao Cai
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
| | - Yuan-Yuan Zhang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
| | - Ke-Zhi Zhang
- Department of Hepatobiliary Surgery, Taizhou People's Hospital, Taizhou, Jiangsu, China
| | - Ling-Qun Kong
- Department of Hepatobiliary Surgery, Binzhou Medical College Affiliated Hospital, Binzhou, Shandong, China
| | - Ning Zhang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
| | - Bo-Gen Ye
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
| | - De-Ning Ma
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
| | - Hui-Chuan Sun
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, China. .,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, China
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Bu Y, Jia QA, Ren ZG, Xue TC, Zhang QB, Zhang KZ, Zhang QB, You Y, Tian H, Qin LX, Tang ZY. The herbal compound Songyou Yin (SYY) inhibits hepatocellular carcinoma growth and improves survival in models of chronic fibrosis via paracrine inhibition of activated hepatic stellate cells. Oncotarget 2016; 6:40068-80. [PMID: 26517671 PMCID: PMC4741880 DOI: 10.18632/oncotarget.5313] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 10/09/2015] [Indexed: 01/27/2023] Open
Abstract
Chronic fibrosis is a major risk factor for the development of hepatocellular carcinoma (HCC). The pathological progression of hepatic fibrosis has been linked to cellular processes that promote tumor growth and metastasis. Several recent studies have highlighted the cross-talk between tumor cells and activated hepatic stellate cells (aHSCs) in HCC. The herbal compound Songyou Yin (SYY) is known to attenuate hepatoma cell invasion and metastasis via down-regulation of cytokine secretion by aHSCs. However the underlying mechanism of SYY treatment in reversal of hepatic fibrosis and metastasis of liver cancers is not known. In the current study, a nude mouse model with liver fibrosis bearing orthotopic xenograft was established and we found that SYY could reduce associated fibrosis, inhibit tumor growth and improve survival. In the subcutaneous tumor model with fibrosis, we found that SYY could inhibit liver cancer. In vitro, hepatoma cells incubated with conditioned media (CM) from SYY treated aHSCs showed reduced proliferation, decrease in colony formation and invasive potential. SYY treated group showed altered gene expression, with 1205 genes up-regulated and 1323 genes down-regulated. Gene cluster analysis indicated that phosphatidylinositol-3-kinase (PI3K) was one of the key genes altered in the expression profiles. PI3K related markers were all significantly down-regulated. ELISA also indicated decreased secretion of cytokines which were regulated by PI3K/AKT signaling after SYY treatment in the hepatic stellate cell line, LX2. These data clearly demonstrate that SYY therapy inhibits HCC invasive and metastatic potential and improves survival in nude mice models with chronic fibrosis background via inhibition of cytokine secretion by activated hepatic stellate cells.
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Affiliation(s)
- Yang Bu
- Hepatobiliary Surgery, General Hospital of Ningxia Medical University, Yinchuan 750001, China.,Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Qing-An Jia
- Cancer Center, Institutes of Biomedical Sciences, General Surgery, Huashan Hospital, Fudan University, Shanghai 200032, China
| | - Zheng-Gang Ren
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Tong-Chun Xue
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Quan-Bao Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Ke-Zhi Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Qiang-Bo Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Yang You
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Hui Tian
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
| | - Lun-Xiu Qin
- Cancer Center, Institutes of Biomedical Sciences, General Surgery, Huashan Hospital, Fudan University, Shanghai 200032, China
| | - Zhao-You Tang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai 200032, China
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Zhang KZ, Zhang QB, Zhang QB, Sun HC, Ao JY, Chai ZT, Zhu XD, Lu L, Zhang YY, Bu Y, Kong LQ, Tang ZY. Arsenic trioxide induces differentiation of CD133+ hepatocellular carcinoma cells and prolongs posthepatectomy survival by targeting GLI1 expression in a mouse model. J Hematol Oncol 2014; 7:28. [PMID: 24678763 PMCID: PMC4022144 DOI: 10.1186/1756-8722-7-28] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 03/20/2014] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Cancer stem cells (CSCs) play a key role in the posthepatectomy recurrence of hepatocellular carcinoma (HCC). CD133+ HCC cells exhibit liver CSC-like properties, and CSC differentiation-inducing therapy may lead these cells to lose their self-renewal ability and may induce terminal differentiation, which may in turn allow their malignant potential to be controlled. Because arsenic trioxide (As₂O₃) increases remission rates and prolongs survival among patients with acute promyelocytic leukemia by inducing differentiation and apoptosis of leukemic cells, we hypothesized that As₂O₃ might also inhibit HCC recurrence and prolong survival time after hepatectomy by inducing differentiation of HCC CSCs. METHODS We evaluated the As₂O₃ induced differentiation of human HCC CSCs and its mechanism in vitro, and we investigated the effects of treatment with As₂O₃ on recurrence rates and median survival in a mouse xenograft model. RESULTS We found that As₂O₃ induced HCC CSC differentiation by down-regulating the expression of CD133 and some stemness genes, thus inhibiting the cells' self-renewal ability and tumorigenic capacity without inhibiting their proliferation in vitro. In vivo experiments indicated that As₂O₃ decreased recurrence rates after radical resection and prolonged survival in a mouse model. As₂O₃, which shows no apparent toxicity, may induce HCC CSC differentiation by down-regulating the expression of GLI1. CONCLUSIONS We found that As₂O₃ induced HCC CSC differentiation, inhibited recurrence, and prolonged survival after hepatectomy by targeting GLI1expression. Our results suggest that the clinical safety and utility of As₂O₃ should be further evaluated.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Zhao-You Tang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, 136 Yi Xue Yuan Road, Shanghai 200032, P R China.
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Chai ZT, Kong J, Zhu XD, Zhang YY, Lu L, Zhou JM, Wang LR, Zhang KZ, Zhang QB, Ao JY, Wang M, Wu WZ, Wang L, Tang ZY, Sun HC. MicroRNA-26a inhibits angiogenesis by down-regulating VEGFA through the PIK3C2α/Akt/HIF-1α pathway in hepatocellular carcinoma. PLoS One 2013; 8:e77957. [PMID: 24194905 PMCID: PMC3806796 DOI: 10.1371/journal.pone.0077957] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 09/06/2013] [Indexed: 12/21/2022] Open
Abstract
Background & Aims microRNAs (miRNAs) have been reported to regulate angiogenesis by down-regulating the expression of pro-angiogenic or anti-angiogenic factors. The aims of this study were to investigate whether miR-26a inhibited angiogenesis by down-regulating vascular endothelial growth factor A (VEGFA) and its clinical relevance in hepatocellular carcinoma (HCC). Methods The expression of miR-26a was modified in HepG2 and HCCLM3 cell lines respectively, and a panel of angiogenic factors was measured by real-time PCR in the cells. A luciferase reporter assay was used to validate the target gene of miR-26a. Specific inhibitors of signal transduction pathway and siRNA approaches were used to explore the regulatory mechanism of miR-26a. Migration and tube forming assays were conducted to show the changes of angiogenesis induced by miR-26a and its target genes. Finally animal studies were used to further validate those findings. Results Ectopic expression of miR-26a exhibited decreased levels of VEGFA in HepG2 cells. Migration and tube forming of human umbilical vein endothelial cells (HUVECs) were decreased in the conditioned medium from ectopic expression of miR-26a in HepG2 cells compared to control HepG2 cells. The pro-angiogenic effects of the conditioned medium of HepG2 cells on HUVECs were specifically decreased by LY294002, YC-1, and bevacizumab. Integrated analysis disclosed PIK3C2α as a downstream target gene of miR-26a. Ectopic expression of miR-26a suppressed ectopic and orthotopic tumor growth and vascularity in nude mice. The results in HCCLM3 were consistent with those in HepG2. miR-26a expression was inversely correlated with VEGFA expression in HCC patients. Conclusions miR-26a modulated angiogenesis of HCC through the PIK3C2α/Akt/HIF-1α/VEGFA pathway. The expression of VEGFA was inversely correlated with miR-26a expression in HCC tumors.
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Affiliation(s)
- Zong-Tao Chai
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Jian Kong
- Department of Hepatobiliary Surgery, Capital Medical University, Beijing Chaoyang Hospital, Beijing, P.R. China
| | - Xiao-Dong Zhu
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Yuan-Yuan Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Lu Lu
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Jia-Min Zhou
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Long-Rong Wang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Ke-Zhi Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Qiang-Bo Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Jian-Yang Ao
- Department of Hepatobiliary Surgery, Capital Medical University, Beijing Chaoyang Hospital, Beijing, P.R. China
| | - Miao Wang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Wei-Zhong Wu
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Lu Wang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Zhao-You Tang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
| | - Hui-Chuan Sun
- Liver Cancer Institute, Zhongshan Hospital, Fudan University; Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, P.R. China
- * E-mail:
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9
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Lu L, Sun HC, Zhang W, Chai ZT, Zhu XD, Kong LQ, Wang WQ, Zhang KZ, Zhang YY, Zhang QB, Ao JY, Li JQ, Wang L, Wu WZ, Tang ZY. Aspirin minimized the pro-metastasis effect of sorafenib and improved survival by up-regulating HTATIP2 in hepatocellular carcinoma. PLoS One 2013; 8:e65023. [PMID: 23741443 PMCID: PMC3669011 DOI: 10.1371/journal.pone.0065023] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 04/19/2013] [Indexed: 12/16/2022] Open
Abstract
Background & Aims We previously demonstrated the pro-metastasis effect of sorafenib in hepatocellular carcinoma (HCC), which is mediated by down-regulation of tumor suppressor HTATIP2. The aim of the present study was to determine whether aspirin minimizes this effect and improves survival. Methods The effects of sorafenib, aspirin, and combined sorafenib and aspirin were observed in HCCLM3 and HepG2 xenograft nude mice. Tumor growth, intrahepatic metastasis (IHM), lung metastasis, and survival were assessed. Polymerase chain reaction (PCR) array, real-time (RT)-PCR, and Western blotting were used to examine gene expression. The anti-invasion and anti-metastasis effects of aspirin were studied in HTATIP2-knockdown and HTATIP2-overexpressing HCC cell lines. The molecular mechanism of HTATIP2 regulation by aspirin was explored. Results Aspirin suppressed the pro-invasion and pro-metastasis effects of sorafenib in HCC and up-regulated HTATIP2 expression. Aspirin did not inhibit the proliferation of HCC cells, but it decreased the invasiveness of HCC with lower expression of HTATIP2 and increased expression of a set of markers, indicating a mesenchymal-to-epithelial transition in tumor cells. The up-regulation of HTATPI2 expression by aspirin is most likely mediated through inhibition of cyclooxygenase (COX) 2 expression. Conclusions Aspirin minimized the pro-metastasis effect of sorafenib by up-regulating the tumor suppressor HTATIP2; this mechanism is mediated through inhibition of COX2.
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Affiliation(s)
- Lu Lu
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Hui-Chuan Sun
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Wei Zhang
- Department of Hepatobiliary Surgery, Tianjin Medical University Cancer Institute and Hospital (TJCIH); Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin, P.R. China
| | - Zong-Tao Chai
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Xiao-Dong Zhu
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Ling-Qun Kong
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Wen-Quan Wang
- Department of Hepatobiliary and Pancreatic Surgery, Cancer Hospital/Cancer Institute, Fudan University, Shanghai, P.R. China
| | - Ke-Zhi Zhang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Yuan-Yuan Zhang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Qiang-Bo Zhang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Jian-Yang Ao
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Jia-Qi Li
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Lu Wang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Wei-Zhong Wu
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
| | - Zhao-You Tang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University; Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, P.R. China
- * E-mail:
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10
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Zhang QB, Sun HC, Zhang KZ, Jia QA, Bu Y, Wang M, Chai ZT, Zhang QB, Wang WQ, Kong LQ, Zhu XD, Lu L, Wu WZ, Wang L, Tang ZY. Suppression of natural killer cells by sorafenib contributes to prometastatic effects in hepatocellular carcinoma. PLoS One 2013; 8:e55945. [PMID: 23409093 PMCID: PMC3568028 DOI: 10.1371/journal.pone.0055945] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 01/03/2013] [Indexed: 01/17/2023] Open
Abstract
Sorafenib, a multi-tyrosine kinase inhibitor, is a standard treatment for advanced hepatocellular carcinoma (HCC). The present study was undertaken to determine whether the growth and metastasis of HCC were influenced in mice receiving sorafenib prior to implantation with tumors, and to investigate the in-vivo and in-vitro effect of sorafenib on natural killer (NK) cells. In sorafenib-pretreated BALB/c nu/nu mice and C57BL/6 mice, tumor growth was accelerated, mouse survival was decreased, and lung metastasis was increased. However, the depletion of NK1.1+ cells in C57BL/6 mice eliminated sorafenib-mediated pro-metastatic effects. Sorafenib significantly reduced the number of NK cells and inhibited reactivity of NK cells against tumor cells, in both tumor-bearing and tumor-free C57BL/6 mice. Sorafenib down-regulated the stimulatory receptor CD69 in NK cells of tumor-bearing mice, but not in tumor-free mice, and inhibited proliferation of NK92-MI cells, which is associated with the blocking of the PI3K/AKT pathway, and inhibited cytotoxicity of NK cells in response to tumor targets, which was due to impaired ERK phosphorylation. These results suggest immunotherapeutic approaches activating NK cells may enhance the therapeutic efficacy of sorafenib in HCC patients.
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MESH Headings
- Animals
- Antigens, CD/metabolism
- Antigens, Differentiation, T-Lymphocyte/metabolism
- Antineoplastic Agents/administration & dosage
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/toxicity
- Carcinoma, Hepatocellular/immunology
- Carcinoma, Hepatocellular/mortality
- Carcinoma, Hepatocellular/pathology
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Disease Models, Animal
- Humans
- Immunocompromised Host
- Immunosuppressive Agents/administration & dosage
- Immunosuppressive Agents/pharmacology
- Immunosuppressive Agents/toxicity
- K562 Cells
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Lectins, C-Type/metabolism
- Liver Neoplasms/immunology
- Liver Neoplasms/mortality
- Liver Neoplasms/pathology
- Lung Neoplasms/pathology
- Lung Neoplasms/secondary
- MAP Kinase Signaling System/drug effects
- Male
- Mice
- Neoplasm Metastasis
- Niacinamide/administration & dosage
- Niacinamide/analogs & derivatives
- Niacinamide/pharmacology
- Phenylurea Compounds/administration & dosage
- Phenylurea Compounds/pharmacology
- Phosphatidylinositol 3-Kinases/metabolism
- Proto-Oncogene Proteins c-akt/metabolism
- Proto-Oncogene Proteins c-raf/metabolism
- Signal Transduction/drug effects
- Sorafenib
- Tumor Burden/drug effects
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Qiang-Bo Zhang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Hui-Chuan Sun
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Ke-Zhi Zhang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Qing-An Jia
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Yang Bu
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Miao Wang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Zong-Tao Chai
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Quan-Bao Zhang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Wen-Quan Wang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Ling-Qun Kong
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Xiao-dong Zhu
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Lu Lu
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Wei-Zhong Wu
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Lu Wang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
| | - Zhao-You Tang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Key Laboratory for Carcinogenesis and Cancer Invasion, The Chinese Ministry of Education, Shanghai, People’s Republic of China
- * E-mail:
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11
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Wang T, Yang Z, Dong P, long JD, He XZ, Wang X, Zhang KZ, Zhang LW. Electrical shielding box measurement of the negative hydrogen beam from Penning ion gauge ion source. Rev Sci Instrum 2012; 83:063302. [PMID: 22755617 DOI: 10.1063/1.4725534] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The cold-cathode Penning ion gauge (PIG) type ion source has been used for generation of negative hydrogen (H(-)) ions as the internal ion source of a compact cyclotron. A novel method called electrical shielding box dc beam measurement is described in this paper, and the beam intensity was measured under dc extraction inside an electrical shielding box. The results of the trajectory simulation and dc H(-) beam extraction measurement were presented. The effect of gas flow rate, magnetic field strength, arc current, and extraction voltage were also discussed. In conclusion, the dc H(-) beam current of about 4 mA from the PIG ion source with the puller voltage of 40 kV and arc current of 1.31 A was extrapolated from the measurement at low extraction dc voltages.
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Affiliation(s)
- T Wang
- Institute of Fluid Physics, CAEP, P.O. Box 919-106, Mianyang 621900, China.
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12
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Zhang KZ, Lin BZ, Chen YL, Xu BH, Pian XT, Kuang JD, Li B. Fe-doped and ZnO-pillared titanates as visible-light-driven photocatalysts. J Colloid Interface Sci 2011; 358:360-8. [DOI: 10.1016/j.jcis.2011.03.021] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 03/04/2011] [Accepted: 03/06/2011] [Indexed: 11/16/2022]
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13
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Zhang T, Sun HC, Xu Y, Zhang KZ, Wang L, Qin LX, Wu WZ, Liu YK, Ye SL, Tang ZY. Overexpression of platelet-derived growth factor receptor alpha in endothelial cells of hepatocellular carcinoma associated with high metastatic potential. Clin Cancer Res 2006; 11:8557-63. [PMID: 16361537 DOI: 10.1158/1078-0432.ccr-05-0944] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [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: 12/12/2022]
Abstract
PURPOSE Little information is available on the heterogeneity of the vascular endothelium in hepatocellular carcinoma. The aim of this study was to identify the differentially expressed genes in tumor endothelial cells from highly metastatic hepatocellular carcinoma. EXPERIMENTAL DESIGN Magnetic beads conjugated with anti-CD31 antibody were used to isolate vascular endothelial cells from hepatocellular carcinoma xenografts with different metastatic potentials in nude mice. Gene expression profiles for different endothelial cells were compared by use of cDNA microarray. The up-regulated gene was confirmed by reverse transcription-PCR, real-time PCR, and immunohistochemistry. RESULTS cDNA microarray analysis revealed differential expression patterns in seven genes consistently presented in endothelial cells isolated from hepatocellular carcinoma with different metastatic potentials. Overexpression of platelet-derived growth factor receptor alpha was found only in the endothelium of highly metastatic hepatocellular carcinoma, which was confirmed by reverse transcription-PCR, real-time PCR, and immunohistochemistry. Oral administration of STI571 (imatinib mesylate or Glivec), a protein tyrosine kinase inhibitor of platelet-derived growth factor receptor, combined with s.c. injection of IFN-alpha not only effectively reduced tumor weight (by 81.8%) and microvessel density (by 70.2%) but also inhibited lung metastasis (by 100%). Furthermore, immunohistochemical analysis of platelet-derived growth factor receptor alpha in human hepatocellular carcinoma tissues revealed its correlation with postoperative recurrence, especially in patients without microvessel invasion. CONCLUSIONS The gene expression of hepatocellular carcinoma vascular endothelium is different between tumors with different metastatic potential. Platelet-derived growth factor receptor alpha, which is overexpressed in endothelium of highly metastatic hepatocellular carcinoma, may serve as a biomarker for predicting metastasis and a therapeutic target for highly metastatic hepatocellular carcinoma.
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Affiliation(s)
- Ti Zhang
- Liver Cancer Institute and Zhong Shan Hospital of Fudan University, Shanghai, People's Republic of China
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14
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Abstract
Stanniocalcin (STC) is a 28 kD glycoprotein hormone originally found in bony fish in which it regulates calcium/phosphate homeostasis and protects against hypercalcemia. The recently characterized mammalian STC shows about 70% homology with fish STC. The epithelial cells of proximal tubuli in human and rat kidney and brain neurons have been found to express STC. Here we show that the epithelium of the choroid plexus, already at 16 weeks of fetal age, and of plexus papillomas, synthesize and express STC. Our findings suggest that STC may be of importance for the distribution of calcium and phosphate between the cerebrospinal fluid and blood.
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Affiliation(s)
- A M Franzén
- Department of Pathology, Haartman Institute, Helsinki University Central Hospital, P.O. Box 21, FIN-00014 Helsinki, Finland
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15
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Abstract
Gelsolin belongs to a family of proteins that modulate the structural dynamics of cytoskeletal actin. Gelsolin activity is required for the redistribution of actin occurring during membrane ruffling, cell crawling, and platelet activation. A point mutation (G654A) in the gelsolin gene causes a dominantly inherited systemic amyloidosis called familial amyloidosis of the Finnish type (FAF). This disease is characterized by a cranial neuropathy that cannot be explained solely by amyloid deposits. To address the question of whether gelsolin has a specific role in neural cell development, we transfected cDNA for wild type and G654A point-mutated gelsolin into a neural cell line, Paju, which can be induced to differentiate by treatment with phorbol 12-myristate 13-acetate. Overexpressed wild type gelsolin inhibited neural differentiation whereas mutated gelsolin did not, indicating that appropriate gelsolin activity is essential for neural sprouting. The G654A mutant gelsolin induced stabilization of F-actin and reduced the plasticity of neural development. This provides a novel etiopathogenetic mechanism for the neuronal dysfunction in FAF.
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Affiliation(s)
- J A Westberg
- Department of Pathology, Helsinki University Hospital and Haartman Institute, University of Helsinki, Finland Karolinska Institute and Hospital, Stockholm, Sweden
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16
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Zhang KZ, Westberg JA, Paetau A, von Boguslawsky K, Lindsberg P, Erlander M, Guo H, Su J, Olsen HS, Andersson LC. High expression of stanniocalcin in differentiated brain neurons. Am J Pathol 1998; 153:439-45. [PMID: 9708804 PMCID: PMC1852984 DOI: 10.1016/s0002-9440(10)65587-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Stanniocalcin (STC) is a glycoprotein hormone first found in fish, in which it regulates calcium homeostasis and protects against hypercalcemia. Human and mouse stc cDNA were recently cloned. We found a dramatically upregulated expression of STC during induced neural differentiation in a human neural crest-derived cell line, Paju. Immunohistochemical staining of sections from human and adult mouse brain revealed abundant presence of STC in the neurons with no activity in the glial cells. STC expression was not seen in immature brain neurons of fetal or newborn mice. Given that STC has been found to regulate calcium/phosphate metabolism in some mammalian epithelia, we suggest that STC may act as a regulator of calcium homeostasis in terminally differentiated brain neurons.
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Affiliation(s)
- K Z Zhang
- Department of Pathology, Haartman Institute, University of Helsinki, Finland
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17
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Zhang KZ, Junnikkala S, Erlander MG, Guo H, Westberg JA, Meri S, Andersson LC. Up-regulated expression of decay-accelerating factor (CD55) confers increased complement resistance to sprouting neural cells. Eur J Immunol 1998; 28:1189-96. [PMID: 9565358 DOI: 10.1002/(sici)1521-4141(199804)28:04<1189::aid-immu1189>3.0.co;2-d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/10/2022]
Abstract
We studied gene expression in relation to induced neural differentiation in a human neural crest-derived cell line, Paju. Messenger RNA isolated before and after treatment with phorbol 12-myristate 13-acetate was analyzed by differential display reverse transcription PCR. A strongly up-regulated expression of decay-accelerating factor (DAF, CD55) was found to parallel the induced neural sprouting while the expression of two other complement regulatory proteins (CD59/protectin, CD46/membrane cofactor protein) remained unaltered during neural differentiation. The increased membrane expression of DAF, which was also seen on neural processes and growth cones, conferred elevated resistance to complement-mediated lysis. Our findings suggest that in sprouting neurons DAF expression is up-regulated to provide additional complement resistance to pathfinding axons/dendrites invading new environment. It is also suggested that membrane expression of DAF may constitute a marker of growing and regenerating neurons.
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Affiliation(s)
- K Z Zhang
- Department of Pathology, Haartman Institute, University of Helsinki, Finland
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18
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Zhang KZ, Bender JE, Lee S, McFeely FR. Si 2p core-level shifts at the Si(100)-SiO2 interface: An experimental study. Phys Rev B Condens Matter 1996; 54:7686-7689. [PMID: 9984436 DOI: 10.1103/physrevb.54.7686] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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19
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Abstract
A main function attributed to the BCL2 protein is its ability to confer resistance against apoptosis. In addition to the constitutively high expression of BCL2, caused by gene rearrangement in follicular lymphomas, elevated expression of the BCL2 gene has been found in differentiating hematopoietic, neural, and epithelial tissues. To address the question of whether the expression of BCL2 is a cause or consequence of cell differentiation, we used a human neural-crest-derived tumor cell line, Paju, that undergoes spontaneous neural differentiation in vitro. The Paju cell line displays moderate expression of BCL2, the level of which increases in parallel with further neural differentiation induced by treatment with phorbol 12-myristate 13-acetate. Transfection of normal human BCL2 cDNA in sense and antisense orientations had a dramatic impact on the differentiation of the Paju cells. Overexpression of BCL2 cDNA induced extensive neurite outgrowth, even in low serum concentrations, together with an increased expression of neuron-specific enolase. Paju cells expressing the anti-sense BCL2 cDNA construct, which reduced the endogenous levels of BCL2, did not undergo spontaneous neural differentiation. These cells acquired an epithelioid morphology and up-regulated the intermediate filament protein nestin, typically present in primitive neuroectodermal cells. The manipulated levels of BCL2 did not have appreciable impact on cell survival in normal culture. Our findings demonstrate that the BCL2 gene product participates in the regulation of neural differentiation.
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Affiliation(s)
- K Z Zhang
- Department of Pathology, University of Helsinki, Haartman Institute, Finland
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20
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Abstract
In a previous paper, an algorithm was presented for analyzing multiple RNA secondary structures utilizing a multiple string alignment algorithm. In this paper we present another approach to the problem of comparing many secondary structures by utilizing a very efficient tree-matching algorithm that will compare two trees in O([T1] X [T2] X L1 X L2) in the worst case and very close to O([T1] X [T2]) for average trees representing secondary structures. The result of the pairwise comparison algorithm is then used with a cluster algorithm to produce a multiple structure clustering which can be displayed in a taxonomy tree to show related structures.
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Affiliation(s)
- B A Shapiro
- Image Processing Section, National Cancer Institute, National Institutes of Health, Frederick, MD 21701
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21
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Abstract
This is a collective review of 564 patients with Marfan syndrome among 98 pedigrees reported from 18 provinces and cities in China over a 37-year period from 1951 to 1987. A positive family history of Marfan syndrome was found in 74.3% of the patients: the mode of inheritance was dominant in 73.8% and recessive in 0.5%. Sporadic cases occurred in 25.7%. A screening of 29,067 children found five children with Marfan syndrome, giving a prevalence of 17.2 per 100,000 of the population, a gene frequency of 8.61 per 100,000 genes, and a penetrance of 71.69%. Pleiotropy was clear in these cases: arachnodactyly in 77%, ectopia lentis in 86.8%, and dilated aortic root in 80.1%. Chromosome examination showed no regular aberrations except in a family of five in whom a giant-satellited chromosome 14 was found in three afflicted members but not in the two unaffected relatives. The high prevalence of aortic root dilation in Marfan syndrome makes echocardiography the most useful and practical means of diagnosis. Close follow-up and regular echocardiographic evaluation are indicated not only in patients with Marfan syndrome but also in their families, for both diagnostic and therapeutic purposes.
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Affiliation(s)
- Q B Sun
- Dandong First Hospital, China
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22
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Chen G, Zhang KZ, Liao ZH, Wang SH, Ma SJ, Long ZZ, Tian WT, Zhu JY. Studies on peripheral T lymphocyte subsets in patients with autoimmune thyroid diseases. Chin Med J (Engl) 1989; 102:698-701. [PMID: 2534289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Peripheral T lymphocyte subsets in 60 cases of Graves' disease (GD) and 16 cases of Hashimoto's thyroiditis (HT) were determined by the use of OKT monoclonal antibodies (McAb). The results showed that in both diseases OKT3 cells (total T cells) and OKT8 cells (suppressor T cells, TS cells) were lower and the ratio of OKT4 cells (helper T cells, TH cells) OKT8 cells was much higher than those in normal controls. GD patients who were treated with antithyroid drugs (ATD) and whose serum T3, T4 recovered to normal, could be further divided into subgroups of high OKT4/OKT8 cell ratio and of normal ratio. The pathogenesis, treatment and relapse of autoimmune thyroid diseases (AITD) were discussed in this paper on the basis of the results.
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Abstract
One member of a Chinese family with Holt-Oram syndrome also had high myopia, which is a hitherto unreported feature. The genetic background of this unusual association is discussed.
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Abstract
This is a collective review of all cases of HOS reported from China. Of the 24 total cases, 18 are living and are included in this report. The clinical features, including previously undescribed associated anomalies, mode of transmission in the family, genetic characteristics, and dermatoglyphics of this familial upper limb-cardiovascular syndrome, are presented. A practical classification of the syndrome is proposed based on the relative preponderance of either upper limb deformities or cardiovascular anomalies.
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25
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Zhang KZ, Lin ZZ, Wang RY, Wang GF. Malignant exophthalmos. A clinical observation of 12 cases. J TRADIT CHIN MED 1982; 2:299-302. [PMID: 6765727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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26
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Zhang KZ. [Cardiac arrhythmia during the act of swallowing. A report of two cases (author's transl)]. Zhonghua Nei Ke Za Zhi 1980; 19:342-3. [PMID: 7227068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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