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Fushimi A, Morimoto Y, Ishikawa S, Yamashita N, Bhattacharya A, Daimon T, Rajabi H, Jin C, Hagiwara M, Yasumizu Y, Luan Z, Suo W, Wong KK, Withers H, Liu S, Long MD, Kufe D. Dependence on the MUC1-C Oncoprotein in Classic, Variant, and Non-neuroendocrine Small Cell Lung Cancer. Mol Cancer Res 2022; 20:1379-1390. [PMID: 35612556 PMCID: PMC9437561 DOI: 10.1158/1541-7786.mcr-22-0165] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/27/2022] [Accepted: 05/20/2022] [Indexed: 01/07/2023]
Abstract
Small cell lung cancer (SCLC) is a recalcitrant malignancy defined by subtypes on the basis of differential expression of the ASCL1, NEUROD1, and POU2F3 transcription factors. The MUC1-C protein is activated in pulmonary epithelial cells by exposure to environmental carcinogens and promotes oncogenesis; however, there is no known association between MUC1-C and SCLC. We report that MUC1-C is expressed in classic neuroendocrine (NE) SCLC-A, variant NE SCLC-N and non-NE SCLC-P cells and activates the MYC pathway in these subtypes. In SCLC cells characterized by NE differentiation and DNA replication stress, we show that MUC1-C activates the MYC pathway in association with induction of E2F target genes and dysregulation of mitotic progression. Our studies further demonstrate that the MUC1-C→MYC pathway is necessary for induction of (i) NOTCH2, a marker of pulmonary NE stem cells that are the proposed cell of SCLC origin, and (ii) ASCL1 and NEUROD1. We also show that the MUC1-C→MYC→NOTCH2 network is necessary for self-renewal capacity and tumorigenicity of NE and non-NE SCLC cells. Analyses of datasets from SCLC tumors confirmed that MUC1 expression in single SCLC cells significantly associates with activation of the MYC pathway. These findings demonstrate that SCLC cells are addicted to MUC1-C and identify a potential new target for SCLC treatment. IMPLICATIONS This work uncovers addiction of SCLC cells to MUC1-C, which is a druggable target that could provide new opportunities for advancing SCLC treatment.
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Affiliation(s)
- Atsushi Fushimi
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Yoshihiro Morimoto
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Satoshi Ishikawa
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Nami Yamashita
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | | | - Tatsuaki Daimon
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Hasan Rajabi
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Caining Jin
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Masayuki Hagiwara
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Yota Yasumizu
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Zhou Luan
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Wenhao Suo
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts
| | - Kwok-Kin Wong
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Medical Center, New York, New York
| | - Henry Withers
- Department of Biostatistics & Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, New York
| | - Song Liu
- Department of Biostatistics & Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, New York
| | - Mark D. Long
- Department of Biostatistics & Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, New York.,Corresponding Authors: Donald Kufe, Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215. E-mail: ; and Mark D. Long, Roswell Park Comprehensive Cancer Center, Carlton & Elm Streets, Buffalo, NY 14263. E-mail:
| | - Donald Kufe
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts.,Corresponding Authors: Donald Kufe, Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215. E-mail: ; and Mark D. Long, Roswell Park Comprehensive Cancer Center, Carlton & Elm Streets, Buffalo, NY 14263. E-mail:
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Wang R, Zhao Y, Wang Y, Zhao Z, Chen Q, Duan Y, Xiong S, Luan Z, Wang J, Cheng B. Diagnostic and Prognostic Values of KRAS Mutations on EUS-FNA Specimens and Circulating Tumor DNA in Patients With Pancreatic Cancer. Clin Transl Gastroenterol 2022; 13:e00487. [PMID: 35351843 PMCID: PMC9132521 DOI: 10.14309/ctg.0000000000000487] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 03/25/2022] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION The ability of carbohydrate antigen 19-9 (CA19-9) to differentiate pancreatic cancer from other benign pancreatic lesions is unsatisfactory. This study explored the diagnostic value of KRAS gene mutations and plasma circulating tumor DNA (ctDNA) in patients with pancreatic cancer. METHODS The prospective cohort study comprised 149 consecutive patients with solid pancreatic lesions who underwent endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA). KRAS subtype mutations were analyzed by digital droplet PCR (ddPCR) in EUS-FNA histopathology tissue samples, and blood samples were sent for plasma ctDNA analysis. The final diagnosis was based on surgical resection pathology or follow-up for at least 2 years. RESULTS Adding KRAS mutation ddPCR increased the sensitivity and accuracy of EUS-FNA from 71.4% to 91.6% (P < 0.001) and 75.8% to 88.6% (P < 0.001), respectively. By comparison, the sensitivities of circulating biomarkers ctDNA and CA19-9 were only 35.2% and 71.2%. The area under the curve of the receiver operating characteristic curve (AUC) of EUS-FNA and KRAS ddPCR combination was >0.90 for distinguishing pancreatic cancer from benign lesions, whereas the AUC of EUS-FNA and CA19-9 combination was 0.83. The median survival time was significantly shorter in patients with G12D KRAS mutations than that in patients with other mutations (180 vs 240 days, P < 0.001). DISCUSSION FNA tissue sample KRAS mutation analysis in tissues significantly improves the diagnostic accuracy of cyto/histopathological evaluation in EUS-FNA samples. The combination of EUS-FNA and tissue sample KRAS ddPCR provided a more accurate method for pancreatic cancer diagnosis, superior to the combination of EUS-FNA and CA19-9/ctDNA. G12D KRAS mutations in pancreatic cancer were independently associated with poor overall survival.
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Affiliation(s)
- Ronghua Wang
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - Yuchong Zhao
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yun Wang
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhenxiong Zhao
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Chen
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yaqi Duan
- Department of Pathology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Si Xiong
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhou Luan
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinlin Wang
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bin Cheng
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Luan Z, Morimoto Y, Fushimi A, Yamashita N, Suo W, Bhattacharya A, Hagiwara M, Jin C, Kufe D. MUC1-C dictates neuroendocrine lineage specification in pancreatic ductal adenocarcinomas. Carcinogenesis 2022; 43:67-76. [PMID: 34657147 PMCID: PMC8832436 DOI: 10.1093/carcin/bgab097] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/22/2021] [Accepted: 10/15/2021] [Indexed: 01/16/2023] Open
Abstract
Pancreatic ductal adenocarcinomas (PDAC) and poorly differentiated pancreatic neuroendocrine (NE) carcinomas are KRAS mutant malignancies with a potential common cell of origin. PDAC ductal, but not NE, lineage traits have been associated with cell-intrinsic activation of interferon (IFN) pathways. The present studies demonstrate that the MUC1 C-terminal subunit (MUC1-C), which evolved to protect mammalian epithelia from loss of homeostasis, is aberrantly overexpressed in KRAS mutant PDAC tumors and cell lines. We show that MUC1-C is necessary for activation of the type I and II IFN pathways and for expression of the Yamanaka OCT4, SOX2, KLF4 and MYC (OSKM) pluripotency factors. Our results demonstrate that MUC1-C integrates IFN signaling and pluripotency with NE dedifferentiation by forming a complex with MYC and driving the (i) achaete-scute homolog 1 and BRN2/POU3F2 neural, and (ii) NOTCH1/2 stemness transcription factors. Of translational relevance, targeting MUC1-C genetically and pharmacologically in PDAC cells (i) suppresses OSKM, NE dedifferentiation and NOTCH1/2, and (ii) inhibits self-renewal capacity and tumorigenicity. In PDAC tumors, we show that MUC1 significantly associates with activation of IFN signaling, MYC and NOTCH, and that upregulation of the MUC1-C → MYC pathway confers a poor prognosis. These findings indicate that MUC1-C dictates PDAC NE lineage specification and is a potential target for the treatment of recalcitrant pancreatic carcinomas with NE dedifferentiation.
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Affiliation(s)
- Zhou Luan
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | | | - Atsushi Fushimi
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Division of Molecular Epidemiology, Jikei University School of Medicine, Tokyo, Japan
| | - Nami Yamashita
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Wenhao Suo
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Department of Pathology, The First Affiliated Hospital, Xiamen University, Xiamen, Fujian, China
| | | | - Masayuki Hagiwara
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Department of Urology, Keio University Medical School, Tokyo, Japan
| | - Caining Jin
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Donald Kufe
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
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Zhao Y, Wang Y, Chen W, Bai S, Peng W, Zheng M, Yang Y, Cheng B, Luan Z. Targeted intervention of eIF4A1 inhibits EMT and metastasis of pancreatic cancer cells via c-MYC/miR-9 signaling. Cancer Cell Int 2021; 21:670. [PMID: 34906136 PMCID: PMC8672469 DOI: 10.1186/s12935-021-02390-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 09/14/2021] [Accepted: 12/03/2021] [Indexed: 02/07/2023] Open
Abstract
Background Owing to the lack of effective treatment options, early metastasis remains the major cause of pancreatic ductal adenocarcinoma (PDAC) recurrence and mortality. However, the molecular mechanism of early metastasis is largely unknown. We characterized the function of eukaryotic translation initiation factors (eIFs) in epithelial-mesenchymal-transition (EMT) and metastasis in pancreatic cancer cells to investigate whether eIFs and downstream c-MYC affect EMT and metastasis by joint interference. Methods We used The Cancer Genome Atlas (TCGA) and Genome Tissue Expression (GTEx) databases to analyze eIF4A1 expression in PDAC tissues and further validated the findings with a microarray containing 53 PDAC samples. Expression regulation and pharmacological inhibition of eIF4A1 and c-MYC were performed to determine their role in migration, invasion, and metastasis in pancreatic cancer cells in vitro and in vivo. Results Elevated eIF4A1 expression was positively correlated with lymph node infiltration, tumor size, and indicated a poor prognosis. eIF4A1 decreased E-cadherin expression through the c-MYC/miR-9 axis. Loss of eIF4A1 and c-MYC decreased the EMT and metastasis capabilities of pancreatic cancer cells, whereas upregulation of eIF4A1 attenuated the inhibition of EMT and metastasis induced by c-MYC downregulation. Treatment with the eIF4A1 inhibitor rocaglamide (RocA) or the c-MYC inhibitor Mycro3 either alone or in combination significantly decreased the expression level of EMT markers in pancreatic cancer cells in vitro. However, the efficiency and safety of RocA alone were not inferior to those of the combination treatment in vivo. Conclusion Overexpression of eIF4A1 downregulated E-cadherin expression through the c-MYC/miR-9 axis, which promoted EMT and metastasis of pancreatic cancer cells. Despite the potential feedback loop between eIF4A1 and c-MYC, RocA monotherapy is a promising treatment inhibiting eIF4A1-induced PDAC metastasis. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-021-02390-0.
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Affiliation(s)
- Yuchong Zhao
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China
| | - Yun Wang
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China.,Departement of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Jianshe East Road No. 1, Zhengzhou, China
| | - Wei Chen
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China
| | - Shuya Bai
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China
| | - Wang Peng
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China
| | - Mengli Zheng
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China
| | - Yilei Yang
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China
| | - Bin Cheng
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China.
| | - Zhou Luan
- Department of Gastroenterology and Hepatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue No. 1095, Wuhan, 430030, China.
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Cao Y, He Y, Yang L, Luan Z. Targeting eIF4A using rocaglate CR‑1‑31B sensitizes gallbladder cancer cells to TRAIL‑mediated apoptosis through the translational downregulation of c‑FLIP. Oncol Rep 2020; 45:230-238. [PMID: 33416145 PMCID: PMC7709814 DOI: 10.3892/or.2020.7856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/29/2020] [Accepted: 10/08/2020] [Indexed: 11/05/2022] Open
Abstract
Induction of the apoptosis of tumor cells is a promising therapeutic approach for the treatment of cancer. Tumor necrosis factor‑related apoptosis‑inducing ligand (TRAIL) is a novel type of anticancer drug. However, gallbladder cancer cells (GBC) exhibit strong resistance to TRAIL. The aim of the present study was to assess the effect of rocaglate CR‑1‑31B (CR‑31), an inhibitor of eukaryotic translation initiation factor 4A (eIF4A), on the sensitization of cells to TRAIL‑induced apoptosis in TRAIL‑resistant GBC. eIF4A was highly abundant in GBC tissues and cell lines (GBC‑SD and SGC‑996). GBC cells were treated using TRAIL and/or CR‑31 and then apoptosis and TRAIL signaling were detected in vitro. CR‑31 enhanced the sensitivity of TRAIL‑resistant GBC cells, due to the CR‑31‑mediated eIF4A translational downregulation of c‑FLIP and the subsequent activation of the caspase cascade. Furthermore, GBC‑SD tumor xenografts models were established and the effects of CR‑31 in vivo were assessed. CR‑31 significantly reduced the growth and initiated the apoptosis of tumor cells, suggesting that CR‑31 also increased sensitivity in vivo. Taken together, the results of the present study show that CR‑31 treatment countered the resistance to TRAIL in GBC cells in vitro and in vivo. Therefore, eIF4A may serve as a novel therapeutic target and its combination with TRAIL‑CR‑31 as a therapy may serve as a novel strategy for GBC treatment.
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Affiliation(s)
- Yang Cao
- Department of Gastric Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P.R. China
| | - Ying He
- Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Litao Yang
- Department of Gastric Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P.R. China
| | - Zhou Luan
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
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Tang XF, Jing YF, Lu W, Huang YZ, Wu NH, Luan Z. [A clinical study of haploidentical hematopoietic stem cell transplantation in the treatment of pediatric patients with acquired severe aplastic anemia: single center experience]. Zhonghua Xue Ye Xue Za Zhi 2019; 40:301-305. [PMID: 31104441 PMCID: PMC7343012 DOI: 10.3760/cma.j.issn.0253-2727.2019.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
目的 探讨单倍型造血干细胞移植(haplo-HSCT)治疗儿童获得性重型再生障碍性贫血(SAA)的疗效。 方法 回顾性分析2011年12月1日至2017年12月1日接受haplo-HSCT的59例SAA患者。 结果 ①全部59例SAA患儿中男37例、女22例,中位年龄4.5(1.2~14.8)岁,中位体重43(12~80)kg;SAA-Ⅰ型47例,SAA-Ⅱ型12例,26例为极重型再生障碍性贫血(VSAA);首次移植56例,二次移植3例。②预处理选用白消安+环磷酰胺+抗胸腺细胞球蛋白(ATG)方案或白消安+氟达拉滨+环磷酰胺+ATG方案;采用环孢素A(CsA)+霉酚酸酯+甲氨蝶呤方案预防急性GVHD;回输单个核细胞中位数为15.60(7.74~21.04)×108/kg,CD34+细胞中位数为4.86(3.74~7.14)×106/kg。③全部59例患儿均获得中性粒细胞和血小板植入。中性粒细胞植入中位时间为13(10~19)d,血小板植入中位时间为19(9~62)d。④Ⅰ~Ⅱ、Ⅲ/Ⅳ度急性GVHD发生率分别为45.76%(27/59)、13.56%(8/59),慢性GVHD发生率为8.47%(5/59)。巨细胞病毒血症发生率为59.32%(35/59)、EB病毒血症发生率为28.81%(17/59)。⑤中位随访时间30(8~80)个月,57例无病存活,2例死亡(均死于GVHD),5年总生存率、无失败生存率均为(96.4±2.5)%。 结论 haplo-HSCT是儿童SAA疗效较好的治疗方法。
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Affiliation(s)
- X F Tang
- Department of Paediatrics, Sixth Medical Center of PLA General Hospital of the People Liberation Army. Beijing 100048, China
| | - Y F Jing
- Department of Paediatrics, Sixth Medical Center of PLA General Hospital of the People Liberation Army. Beijing 100048, China
| | - W Lu
- Department of Paediatrics, Sixth Medical Center of PLA General Hospital of the People Liberation Army. Beijing 100048, China
| | - Y Z Huang
- Hematology Department Laboratory, Sixth Medical Center of PLA General Hospital of the People Liberation Army, Beijing 100048, China
| | - N H Wu
- Department of Paediatrics, Sixth Medical Center of PLA General Hospital of the People Liberation Army. Beijing 100048, China
| | - Z Luan
- Department of Paediatrics, Sixth Medical Center of PLA General Hospital of the People Liberation Army. Beijing 100048, China
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Fang D, He Y, Luan Z. Simvastatin augments activation of liver regeneration through attenuating transforming growth factor-β1 induced-apoptosis in obstructive jaundice rats. Exp Ther Med 2017; 14:4839-4845. [PMID: 29201188 PMCID: PMC5704311 DOI: 10.3892/etm.2017.5156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 09/19/2015] [Accepted: 10/28/2016] [Indexed: 12/16/2022] Open
Abstract
Obstructive jaundice, owing to biliary obstruction, has been illustrated to trigger various biochemical, histological and immunological changes, leading to liver damage or even failure. The detailed molecular mechanism of simvastatin (Sim) involvement in liver regeneration during obstructive jaundice progression remains poorly elucidated. In the present study, an acute obstructive jaundice rat model was established by ligation and division of common bile duct, which was used to investigate the effects of Sim as a hepatoprotective treatment. Male Sprague-Dawley rats were randomly divided into four groups: Sham-operated, bile duct ligation (BDL) plus saline treatment [0.02 mg/kg/d, intraperitoneally (i.p.)], BDL plus low-dose Sim treatment (0.02 mg/kg, i.p.) and BDL plus high-dose Sim treatment (0.2 mg/kg, i.p.). During this experiment, the BDL+normal saline (NS) group demonstrated increased levels of transforming growth factor-β1 (TGF-β1) expression. Furthermore, Sim-treated animals demonstrated significantly downregulated TGF-β1 expression and improved liver function vs. the BDL+NS group, indicating a TGF-β1 antagonizing function. Additionally, Sim increased hepatocyte DNA synthesis in BDL rats compared to both the BDL+NS and Sham group. Apoptosis was increased in BDL+NS compared to the Sham group, and Sim markedly reduced hepatocyte apoptosis in the BDL group. Moreover, analysis of TGF-β1 signaling pathways demonstrated that there was an increased hepatic TGF-β1 and Smad3 expression in the BDL group, which was attenuated in the presence of Sim. In contrast to TGF-β1, Sim induced the activity of the Smad7 (an inhibitor of TGF-β1 signaling) mRNA and Smad7 protein expression. Sim displays hepatoprotective effects in liver cells via the upregulation of Smad7 expression and impaired TGF-β signaling. Furthermore, the observations of the present study may provide evidence on the mechanism behind Sim blunting TGF-β1 signaling, which is used to ameliorate the complication of liver damage and reduce the mortality rates associated with obstructive jaundice.
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Affiliation(s)
- Dazheng Fang
- Department of Hepatobiliary Surgery, Dongfeng General Hospital, Hubei University of Medicine, Shiyan, Hubei 442008, P.R. China
| | - Ying He
- Department of Ophthalmology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430014, P.R. China
| | - Zhou Luan
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
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Cao Y, Liang H, Zhang F, Luan Z, Zhao S, Wang XA, Liu S, Bao R, Shu Y, Ma Q, Zhu J, Liu Y. Prohibitin overexpression predicts poor prognosis and promotes cell proliferation and invasion through ERK pathway activation in gallbladder cancer. J Exp Clin Cancer Res 2016; 35:68. [PMID: 27084680 PMCID: PMC4833931 DOI: 10.1186/s13046-016-0346-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Accepted: 04/11/2016] [Indexed: 12/17/2022]
Abstract
Background Prohibitin (PHB), a pleiotropic protein overexpressed in several tumor types, has been implicated in the regulation of cell proliferation, invasive migration and survival. However, PHB expression and its biological function in gallbladder cancer (GBC) remain largely unknown. Methods PHB and p-ERK protein expressions were determined in human GBC tissues by immunohistochemistry (IHC). The effects of PHB knockdown on GBC cell proliferation and invasiveness were evaluated using Cell Counting Kit-8 (CCK-8) cell viability, cell cycle analysis, transwell invasion and gelatin zymography assays. Subcutaneous xenograft and tail vein-lung metastasis tumor models in nude mice were employed to further substantiate the role of PHB in GBC progression. Results PHB protein was overexpressed in GBC tissues and was significantly associated with histological grade, tumor stage and perineural invasion. Furthermore, PHB expression was negatively associated with overall survival in GBC patients. In vitro experimental studies demonstrated that the downregulation of PHB expression by lentivirus-mediated shRNA interference not only inhibited the ERK pathway activation but also reduced the proliferative and invasive capacities of GBC cells. Moreover, PD0325901, a specific inhibitor of MEK, markedly impaired PHB- mediated phosphorylation of ERK protein. IHC statistical analyses further validated that PHB expression was positively correlated with ERK protein phosphorylation levels in GBC tissue samples. In vivo, PHB depletion also resulted in dramatic reductions in the growth and metastasis of GBC cells. Conclusion Our findings demonstrate that PHB overexpression predicts poor survival in GBC patients. PHB could serve as a novel prognostic biomarker and a potential therapeutic target for GBCs. Electronic supplementary material The online version of this article (doi:10.1186/s13046-016-0346-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yang Cao
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Haibin Liang
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Fei Zhang
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Zhou Luan
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Road, Wuhan, Hubei, 430030, P.R. China
| | - Shuai Zhao
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Xu-An Wang
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Shibo Liu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Runfa Bao
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Yijun Shu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Qiang Ma
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China.,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China
| | - Jian Zhu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China. .,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China.
| | - Yingbin Liu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, P.R. China. .,Institute of Biliary Tract Disease, Shanghai Jiao Tong University School of Medicine, Shanghai, 1665 Kongjiang Road, Shanghai, P.R. China.
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9
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He Y, Luan Z, Fu X, Xu X. Overexpression of uncoupling protein 2 inhibits the high glucose-induced apoptosis of human umbilical vein endothelial cells. Int J Mol Med 2016; 37:631-8. [PMID: 26846204 PMCID: PMC4771113 DOI: 10.3892/ijmm.2016.2478] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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: 06/23/2015] [Accepted: 01/21/2016] [Indexed: 01/09/2023] Open
Abstract
Ectopic apoptosis of vascular cells plays a critical role in the early stage development of diabetic retinopathy (DR). Uncoupling protein 2 (UCP2) is a mitochondrial modulator which protects against endothelial dysfunction. However, the role which UCP2 plays in endothelial apoptosis and its association with DR was unclear. In the present study, we investigated whether UCP2 functioned as an inhibitor of DR in endothelial cells. Firstly, we noted that in UCP2-knockout mice retinal cell death and damage in vivo was similar to that of db/db diabetic mice. Additionally, UCP2 knockdown induced caspase-3 activation and exaggerated high glucose (HG)-induced apoptosis of human umbilical vein endothelial cells (HUVECs). Conversely, adenovirus-mediated UCP2 overexpression inhibited the apoptosis of HUVECs and HG-induced caspase-3 activation. Furthermore, HG treatment resulted in the opening of the permeability transition pore (PTP) and liberation of cytochrome c from mitochondria to the cytosol in HUVECs. Notably, UCP2 overexpression inhibited these processes. Furthermore, adenovirus-mediated UCP2 overexpression led to a significant increase in intracellular nitric oxide (NO) levels and a decrease in reactive oxygen species (ROS) generation in HUVECs. Collectively, these data suggest that UCP2 plays an anti-apoptotic role in endothelial cells. Thus, we suggest that approaches which augment UCP2 expression in vascular endothelial cells aid in preventing the early stage development and progression of DR.
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Affiliation(s)
- Ying He
- Department of Ophthalmology, The Central Hospital of Wuhan, Wuhan, Hubei 430014, P.R. China
| | - Zhou Luan
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Xunan Fu
- Department of Ophthalmology, The Central Hospital of Wuhan, Wuhan, Hubei 430014, P.R. China
| | - Xun Xu
- Department of Ophthalmology, Shanghai First Hospital of Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
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10
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He X, Xu G, Liang W, Liu B, Xu Y, Luan Z, Lu Y, Ko DSC, Manyalich M, Schroder PM, Guo Z. Nomogram for Predicting Time to Death After Withdrawal of Life-Sustaining Treatment in Patients With Devastating Neurological Injury. Am J Transplant 2015; 15:2136-42. [PMID: 25810114 DOI: 10.1111/ajt.13231] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 01/15/2015] [Accepted: 01/16/2015] [Indexed: 01/25/2023]
Abstract
Reliable prediction of time of death after withdrawal of life-sustaining treatment in patients with devastating neurological injury is crucial to successful donation after cardiac death. Herein, we conducted a study of 419 neurocritical patients who underwent life support withdrawal at four neurosurgical centers in China. Based on a retrospective cohort, we used multivariate Cox regression analysis to identify prognostic factors for patient death, which were then integrated into a nomogram. The model was calibrated and validated using data from an external retrospective cohort and a prospective cohort. We identified 10 variables that were incorporated into a nomogram. The C-indexes for predicting the 60-min death probability in the training, external validation and prospective validation cohorts were 0.96 (0.93-0.98), 0.94 (0.91-0.97), and 0.99 (0.97-1.00), respectively. The calibration plots after WLST showed an optimal agreement between the prediction of time to death by the nomogram and the actual observation for all cohorts. Then we identified 22, 26 and 37 as cut-points for risk stratification into four groups. Kaplan-Meier curves indicated distinct prognoses between patients in the different risk groups (p < 0.001). In conclusion, we have developed and validated a nomogram to accurately identify potential cardiac death donors in neurocritical patients in a Chinese population.
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Affiliation(s)
- X He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - G Xu
- Department of Neurosurgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - W Liang
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - B Liu
- Department of Neurosurgery, The People's Hospital of Dongguan City, Dongguan, China
| | - Y Xu
- Department of Neurosurgery, The First People's Hospital of Foshan City, Foshan, China
| | - Z Luan
- Department of Neurosurgery, Jiangmen Central Hospital, Jiangmen, China
| | - Y Lu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - D S C Ko
- Departments of Urology and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - M Manyalich
- TPM-DTI Foundation, Parc Científic de Barcelona, Barcelona, Spain
| | - P M Schroder
- University of Toledo College of Medicine, Toledo, OH
| | - Z Guo
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Luan Z, He Y, He F, Chen Z. Rocaglamide overcomes tumor necrosis factor-related apoptosis-inducing ligand resistance in hepatocellular carcinoma cells by attenuating the inhibition of caspase-8 through cellular FLICE-like-inhibitory protein downregulation. Mol Med Rep 2014; 11:203-11. [PMID: 25333816 PMCID: PMC4237083 DOI: 10.3892/mmr.2014.2718] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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: 10/18/2013] [Accepted: 09/04/2014] [Indexed: 12/18/2022] Open
Abstract
The enhancement of apoptosis is a therapeutic strategy used in the treatment of cancer. Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a promising antitumor agent. However, hepatocellular carcinoma (HCC) cells exhibit marked resistance to the induction of cell death by TRAIL. The present study investigated whether rocaglamide, a naturally occurring product isolated from the genus Aglaia, is able to sensitize resistant HCC cells to TRAIL-mediated apoptosis. Two HCC cell lines, HepG2 and Huh-7, were treated with rocaglamide and/or TRAIL and the induction of apoptosis and effects on the TRAIL signaling pathway were investigated. The in vivo efficacy of rocaglamide was determined in TRAIL-resistant Huh-7-derived tumor xenografts. Rocaglamide significantly sensitized the TRAIL-resistant HCC cells to apoptosis by TRAIL, which resulted from the rocaglamide-mediated downregulation of cellular FLICE-like inhibitory protein and subsequent caspase-8 activation. Furthermore, rocaglamide markedly inhibited tumor growth from Huh-7 cells propagated in severe combined immunodeficient mice, suggesting that chemosentization also occurred in vivo. These data suggest that rocaglamide acted synergistically with TRAIL against the TRAIL-resistant HCC cells. Thus, it is concluded that rocaglamide as an adjuvant to TRAIL-based therapy may present a promising therapeutic approach for the treatment of HCC.
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Affiliation(s)
- Zhou Luan
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Ying He
- Department of Ophthalmology, The Central Hospital of Wuhan, Wuhan, Hubei 430014, P.R. China
| | - Fan He
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Zhishui Chen
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
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12
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Abstract
OBJECTIVES Development of intimal hyperplasia (IH) is the main pathology underlying graft failure following coronary artery bypass graft surgeries for ischaemic heart diseases, especially for great saphenous vein grafts which have a lower patency rate than internal mammary arteries. Neuropilin 1 (NRP1), which is a co-receptor for vascular endothelial growth factor found in vascular endothelial and smooth muscle cells, affects the development of IH. We examined the difference in NRP1 expression and distribution in human coronaries, aortas, mammary arteries and saphenous veins to detect a possible relation to their susceptibility to IH. METHODS Ninety-five human vascular segments obtained from 40 patients were used for the comparison of NRP1 expression between different groups of blood vessels by western blot and real-time PCR. Additionally, staining scores were generated by computerized analysis of the microscopic images obtained after immunofluorescence and immunohistochemical staining to compare NRP1 expression patterns in endothelium, smooth muscles and adventitia in each vessel type. RESULTS NRP1 expression in the aorta (2.03 ± 1.44) was more than twice as high as mammary artery expression (0.85 ± 0.75; n = 16, P = 0.0004); NRP1 of the latter (0.99 ± 0.91) was more than 30% greater than that of the corresponding saphenous vein (0.73 ± 0.69; n = 20, P = 0.0085). In adventitia, NRP1 receptor staining of the saphenous vein was higher (22.96 ± 8.73) than in the mammary artery (15.83 ± 7.13; n = 7, P = 0.049). Variations in NRP1 protein levels were accompanied by parallel variations in its mRNA levels (n = 15, P = 0.34). CONCLUSIONS Autologous saphenous vein grafts, unlike internal mammary artery grafts, have lower NRP1 expression and abundant adventitial distribution of NRP1 within their walls; this may correlate with higher susceptibility to IH development.
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Affiliation(s)
- Mohamed Alattar
- Department of Cardiothoracic Surgery, Zagazig University, Ash Sharqiyah, Egypt
| | - Chunyang Jiang
- Department of Thoracic Surgery, Tianjin Union Medical Center, Tianjin, China
| | - Zhou Luan
- Department of Cardiothoracic Surgery, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tiecheng Pan
- Department of Cardiothoracic Surgery, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ligang Liu
- Department of Cardiothoracic Surgery, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jun Li
- Department of Cardiothoracic Surgery, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Luan Z, He Y, Alattar M, Chen Z, He F. Targeting the prohibitin scaffold-CRAF kinase interaction in RAS-ERK-driven pancreatic ductal adenocarcinoma. Mol Cancer 2014; 13:38. [PMID: 24568222 PMCID: PMC3938031 DOI: 10.1186/1476-4598-13-38] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [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: 11/12/2013] [Accepted: 02/19/2014] [Indexed: 12/19/2022] Open
Abstract
Background Robust ERK1/2 activity, which frequently results from KRAS mutation, invariably occurs in pancreatic ductal adenocarcinoma (PDAC). However, direct interference of KRAS signaling has not led to clinically successful drugs. Correct localization of RAF is regulated by the scaffold protein prohibitin (PHB) that ensures the spatial organization between RAS and RAF in plasma membranes, thus leading to activation of downstream effectors. Methods PHB expression was analyzed in human pancreatic cancer cell lines, normal pancreas, and PDAC tissue. Furthermore, genetic ablation or pharmacological inhibition of PHB was performed to determine its role in growth, migration, and signaling of pancreatic cancer cells in vitro and in vivo. Results The level of PHB expression was crucial for maintenance of oncogenic ERK-driven pancreatic tumorigenesis. Additionally, rocaglamide (RocA), a small molecular inhibitor, selectively bound to PHB with nanomolar affinity to disrupt the PHB-CRAF interaction by altering its localization to the plasma membrane. Consequently, there was an impairment of oncogenic RAS-ERK signaling, thereby blocking in vitro and in vivo growth and metastasis of pancreatic cancer cells that were addicted to RAS-ERK signaling. More importantly, RocA treatment resulted in a significant increase of the lifespan of tumor-bearing mice without any detectable toxicity. Conclusions Blockade of the PHB scaffold-CRAF kinase interaction, which is distinct from direct kinase inhibition, may be a new therapeutic strategy to target oncogenic ERK-driven pancreatic cancer.
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Affiliation(s)
| | | | | | - Zhishui Chen
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Liu WP, Liu CQ, Xiao M, Qu SQ, Hu XH, Wang ZY, He S, Luan Z. Treatment of newborns with severe injured brain with transplantation of human neural precursor cells. Klin Padiatr 2012. [DOI: 10.1055/s-0032-1330780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chen J, Qin M, Fang J, Luan Z, Chai Y, Sun X, Zhu Y, Tang Y. Outcome of 64 Aplastic Anemia Children With Allogenic Hematopoietic Stem Cell Transplant in China: A Report From Chinese Pediatric Group of HSCT. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhou D, Gong H, Luan Z, Hu J, Wu F. Spatial pattern of water controlled wetland communities on the Sanjiang Floodplain, Northeast China. COMMUNITY ECOL 2006. [DOI: 10.1556/comec.7.2006.2.9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Luan Z, Fournier J, Wooten J, Miser D, Chang M. Functionalized mesoporous SBA-15 silica molecular sieves with mercaptopropyl groups: Preparation, characterization and application as adsorbents. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0167-2991(05)80302-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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Abstract
This paper describes a new adsorption material carbon nanotube supported alumina, used for fluoride removal from water. The effects of calcination temperature, alumina loading and pH on fluoride removal capacity were investigated. The optimum calcination temperature for preparing the adsorbents is 450 degrees C and the largest adsorption capacity takes place at alumina loading of 30 wt%. The broad pH range of 6.0-9.0 with high adsorption capability suggests that carbon nanotube supported alumina have great potential applications in practice. The adsorption data at different pH were well fitted to the Freundlich isotherm. The kinetic studies show that the adsorption reaction of fluoride removal by carbon nanotube supported alumina can be described by a second orderrate equation.
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Affiliation(s)
- Y H Li
- Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
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Li Z, Luan Z, Wang S, Gong X, Jia Z. [Treatment of 2-naphtholwastewater using air oxidation and ion exchange]. Huan Jing Ke Xue 2001; 22:53-6. [PMID: 11855181] [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] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The properties of 2-naphtholwastewater were studied in details in this paper, the wastewater was characterized by the strong acidity, high buffer capability and concentrated salt. Air oxidation and anion exchange were employed for the treatment of the wastewater. Under formal pH, room temperature and 1 BV/h rate, the result showed that the removal of COD reached to 97% and the recovery of sodium naphthalensulfonate to 98%. Besides, wastewater treated can be reused for washing the sodium naphthalensulfonate.
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Affiliation(s)
- Z Li
- State Kay Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing 100085, China
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Abstract
CASK, a member of the membrane-associated guanylate kinase (MAGUK) superfamily, binds to the carboxyl-terminus of beta-neurexins on the intracellular side of the presynaptic membrane. The guanylate kinase-like (GUK) domains of MAGUKs lack kinase activities, but might be important for mediating specific protein-protein interaction. By a yeast two-hybrid approach, we identified an interaction between the GUK domain of CASK and the C2B domain of rabphilin3a, a presynaptic protein involved in synaptic vesicle exocytosis. The interaction was confirmed by in vitro GST pull-down and co-immunoprecipitation assays. It was proposed that presynaptic vesicles might be guided to the vicinity of points of exocytosis defined by beta-neurexins via the interaction between rabphilin3a-CASK-beta-neurexins.
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Affiliation(s)
- Y Zhang
- Max-Planck Guest Laboratory, Institute of Biochemistry and Cell Biology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, 320, Yue-Yang Road, 200031, Shanghai, PR China
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Luan Z, Zhao Y, Liu S, Gao L, Li L, Zhang Z. [Relationship between obese gene expressive product and simple obesity in children]. Zhonghua Yu Fang Yi Xue Za Zhi 1999; 33:91-3. [PMID: 11864461] [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] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the relationship between obese gene expressive product-obese protein (OP) and the pathogenesis and prognosis of simple obesity in 30 children with normal body weight (control group). METHODS Before immunoassay, OP was extracted from the whole blood samples with Sep-pak C(18) Cartridge. RESULTS The plasma contents of OP in the obese group were (118.53 +/- 25.02) ng/L and (197.14 +/- 26.83) ng/L (P < 0.001), respectively. In the obese group, plasma OP was not detected in three cases and was (19.90 +/- 3.94) ng/L in other three cases. These obese children with severe OP deficit not only had more increased body mass index, and levels of total cholesterol, triglyceride and low-density lipoprotein-cholesterol, but also had lower therapeutic effect (16.67%) than those with mild OP depletion (79.16%). CONCLUSION The children with simple obesity have OP deficit. Simple obesity may be related with the reduced plasma content of OP. The obese children with severe OP deficit have poorer curative effect and unfavorable prognosis.
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Affiliation(s)
- Z Luan
- Department of Pediatrics The Navy General Hospital, Beijing 100037
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