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Zhang HJ, Chang WJ, Jia CY, Qiao L, Zhou J, Chen Q, Zheng XW, Zhang JH, Li HC, Yang ZY, Liu ZH, Liu GC, Ji SP, Lu F. Destrin Contributes to Lung Adenocarcinoma Progression by Activating Wnt/β-Catenin Signaling Pathway. Mol Cancer Res 2020; 18:1789-1802. [PMID: 32878967 DOI: 10.1158/1541-7786.mcr-20-0187] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 07/09/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022]
Abstract
Lung cancer, especially lung adenocarcinoma, is one of the most common neoplasms worldwide. However, the mechanisms underlying its initiation, development, and metastasis are still poorly understood. Destrin (DSTN) is a member of ADF/cofilin family. Its detailed biological function remains unknown, although it is reported that DSTN is involved in cytoskeleton remodeling and regulation of actin filament turnover. Recent evidence has shown that high expression of cofilin-1 is associated with invasion and poor prognosis of several types of human tumors, but the detailed mechanism is still entirely unclear, particularly in lung cancer tumorigenesis and malignancy. Here, we report that DSTN was highly expressed in a mouse lung cancer model induced by urethane and in clinical lung adenocarcinoma tissue samples. Its expression level was positively correlated with cancer development, as well as metastasis to the liver and lymph nodes. Consistently, it was directly associated with the poor prognosis of lung adenocarcinoma patients. Furthermore, we also found that DSTN promotes cell proliferation, invasion, and migration in vitro, and facilitates subcutaneous tumor formation and lung metastasis via intravenous injection in vivo. Mechanically, DSTN associates with and facilitates nuclear translocation of β-catenin, which promotes epithelial-to-mesenchymal transition (EMT). Taken together, our results indicated that DSTN enhances lung cancer malignancy through facilitating β-catenin nuclear translocation and inducing EMT. Combined with multivariate analyses, DSTN might potentially serve as a therapeutic target and an independent prognostic marker of lung adenocarcinoma. IMPLICATIONS: This finding indicates that DSTN facilitates β-catenin nuclear translocation and promotes malignancy in lung adenocarcinoma.
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Affiliation(s)
- Hui-Juan Zhang
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Wen-Jing Chang
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Cai-Yun Jia
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Ling Qiao
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Jing Zhou
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Qing Chen
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Xiao-Wei Zheng
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China.,Department of Clinical Laboratory, Puyang Hospital of Traditional Chinese Medicine, Puyang, P.R. China
| | - Jian-Hua Zhang
- Department of Clinical Laboratory, Puyang Hospital of Traditional Chinese Medicine, Puyang, P.R. China
| | - Hong-Chao Li
- Department of Pathology, Puyang Oilfeld General Hospital, Puyang, P.R. China
| | - Zheng-Yan Yang
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Zhong-Hua Liu
- Laboratory for NanoMedical Photonics, School of Basic Medical Science, Henan University, Kaifeng, P.R. China
| | - Guang-Chao Liu
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China
| | - Shao-Ping Ji
- Department of Biochemistry and Molecular Biology, Medical School, Henan University, Kaifeng, P.R. China.
| | - Feng Lu
- Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, P.R. China.
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Sarfraz M, Afzal A, Khattak S, Saddozai UAK, Li HM, Zhang QQ, Madni A, Haleem KS, Duan SF, Wu DD, Ji SP, Ji XY. Multifaceted behavior of PEST sequence enriched nuclear proteins in cancer biology and role in gene therapy. J Cell Physiol 2020; 236:1658-1676. [PMID: 32841373 DOI: 10.1002/jcp.30011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 02/28/2020] [Revised: 07/18/2020] [Accepted: 08/04/2020] [Indexed: 01/12/2023]
Abstract
The amino acid sequence enriched with proline (P), glutamic acid (E), serine (S), and threonine (T) (PEST) is a signal-transducing agent providing unique features to its substrate nuclear proteins (PEST-NPs). The PEST motif is responsible for particular posttranslational modifications (PTMs). These PTMs impart distinct properties to PEST-NPs that are responsible for their activation/inhibition, intracellular localization, and stability/degradation. PEST-NPs participate in cancer metabolism, immunity, and protein transcription as oncogenes or as tumor suppressors. Gene-based therapeutics are getting the attention of researchers because of their cell specificity. PEST-NPs are good targets to explore as cancer therapeutics. Insights into PTMs of PEST-NPs demonstrate that these proteins not only interact with each other but also recruit other proteins to/from their active site to promote/inhibit tumors. Thus, the role of PEST-NPs in cancer biology is multivariate. It is hard to obtain therapeutic objectives with single gene therapy. An especially designed combination gene therapy might be a promising strategy in cancer treatment. This review highlights the multifaceted behavior of PEST-NPs in cancer biology. We have summarized a number of studies to address the influence of structure and PEST-mediated PTMs on activation, localization, stability, and protein-protein interactions of PEST-NPs. We also recommend researchers to adopt a pragmatic approach in gene-based cancer therapy.
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Affiliation(s)
- Muhammad Sarfraz
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China.,Faculty of Pharmacy, The University of Lahore, Lahore, Punjab, Pakistan.,Kaifeng Municipal Key Laboratory of Cell Signal Transduction, Henan Provincial Engineering Centre for Tumor Molecular Medicine, Henan University, Kaifeng, Henan, China
| | - Attia Afzal
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China.,Faculty of Pharmacy, The University of Lahore, Lahore, Punjab, Pakistan
| | - Saadullah Khattak
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China
| | - Umair A K Saddozai
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China
| | - Hui-Min Li
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China.,Department of Histology and Embryology, Cell Signal Transduction Laboratory, School of Basic Medical Sciences, Bioinformatics Centre, Institute of Biomedical Informatics, Henan University, Kaifeng, Henan, China
| | - Qian-Qian Zhang
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China
| | - Asadullah Madni
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur, Bahawalpur, Punjab, Pakistan
| | - Kashif S Haleem
- Department of Microbiology, Hazara University, Mansehra, Pakistan
| | - Shao-Feng Duan
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China.,School of Pharmacy, Institute for Innovative Drug Design and Evaluation, Henan University, Kaifeng, Henan, China
| | - Dong-Dong Wu
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China.,School of Stomatology, Henan University, Kaifeng, Henan, China
| | - Shao-Ping Ji
- Kaifeng Municipal Key Laboratory of Cell Signal Transduction, Henan Provincial Engineering Centre for Tumor Molecular Medicine, Henan University, Kaifeng, Henan, China
| | - Xin-Ying Ji
- Henan International Joint Laboratory for Nuclear Protein Regulation & Kaifeng Key Laboratory of Infectious Diseases and Bio-safety, School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, Henan, China
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Afzal A, Sarfraz M, Li GL, Ji SP, Duan SF, Khan NH, Wu DD, Ji XY. Taking a holistic view of PEST-containing nuclear protein (PCNP) in cancer biology. Cancer Med 2019; 8:6335-6343. [PMID: 31487123 PMCID: PMC6797571 DOI: 10.1002/cam4.2465] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 05/29/2019] [Revised: 07/11/2019] [Accepted: 07/12/2019] [Indexed: 12/15/2022] Open
Abstract
Polypeptide sequences enriched with proline (P), glutamic acid (E), aspartic acid (D) and serine (S)/ threonine (T) (PEST) have been reported to be the most abundant and frequently distributed at the cellular level. There is growing evidence that PEST sequences act as proteolytic recognition signals for degradation of residual proteins which is critical for activation or deactivation of regulatory proteins involved in cellular signaling pathways of cell growth, differentiation, stress responses and physiological death. A PEST containing nuclear protein (PCNP) was demonstrated as a tumor suppressor in a neuroblastoma cancer model and tumor promoter in lung adenocarcinoma cancer model. Its unique properties like ubiquitination by NIRF, co‐localization with NIRF in nucleus and tumor progression attract the attention of researchers. PCNP was reported to be ubiquitinated by ring finger protein NIRF in E3 ligase manner and as modulator of MAPK and PI3K/AKT/mTOR signaling pathways. In this review, we summarize PCNP linked DNA damage response, Post translational modifications, and transportation to address initiation, prognosis, and resistance of tumor cells in terms of cell cycle regulation, transcription and apoptosis. Hence, we demonstrate PCNP as a novel target in cancer diagnosis and treatment.
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Affiliation(s)
- Attia Afzal
- Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China.,Faculty of Pharmacy, The University of Lahore, Lahore, Pakistan
| | - Muhammad Sarfraz
- Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China.,Faculty of Pharmacy, The University of Lahore, Lahore, Pakistan.,Muncipal Key Laboratory of Cell Signal Transduction, Henan Provincial Engineering Centre for Tumor Molecular Medicine, Henan University, Kaifeng, China
| | - Guang-Lei Li
- Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Shao-Ping Ji
- Muncipal Key Laboratory of Cell Signal Transduction, Henan Provincial Engineering Centre for Tumor Molecular Medicine, Henan University, Kaifeng, China
| | - Shao-Feng Duan
- Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China.,Institute for Innovative Drug Design and Evaluation, School of Pharmacy, Henan University, Kaifeng, China
| | - Nazeer Hussain Khan
- Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China
| | - Dong-Dong Wu
- Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China.,School of Basic Medical Sciences, Henan University College of Medicine, Kaifeng, China
| | - Xin-Ying Ji
- Henan International Joint Laboratory for Nuclear Protein Regulation, Henan University, Kaifeng, China.,Kaifeng Key Laboratory of Infection and Biological Safety (KLIBS), Henan University College of Medicine, Kaifeng, China
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Huo L, Zhang CY, Dang YF, Zhang WJ, Liu MM, Liu LS, Zhu ZM, Fang N, Ji SP, Sun K. [Inhibitory Effect of Histone Deacetylase Inhibitor SAHA on Proliferation of Mouse Multiple Myeloma Cell Line SP2/0 in vitro and in vivo]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2018; 26:470-476. [PMID: 29665918 DOI: 10.7534/j.issn.1009-2137.2018.02.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To explore the anti-myeloma effect of suberoylanilide hydroxamic acid (SAHA) and on mouse myeloma cell line SP2/0 in vitro and in vivo and its mechanism. METHODS The inhibitory effect of SAHA on SP2/0 cells was measured by CCK-8 assay,and the apoptosis and cell cycle were analyzed by flow cytometry FACS. The protein expression of Caspase-3 and p53 of SP2/0 cells treated with SAHA were examined by Western blot. Annexin V/7-AAD double staining was performed to detect the apoptosis of SP2/0 induced by SAHA in vitro. SP2/0 cells (1×106) resuspended in 200 µl PBS were inoculated subcutaneously and intravenously into BALB/c mice, so as to establish aggressive or non-aggressive myeloma-bearing mouse models respectively. On day 3 after modeling, mice received SAHA or vehicle control treatment by intraperitoneal injection. The dose of SAHA was 60 mg/kg·d, 5 times a week for 3 weeks. RESULTS In SAHA-treated SP2/0 cells, the proliferation inhibition rate and apoptotic cells increased in a dose dependent manner. Also, SAHA significantly increased the ratio of cells in G2 phase and decreased in S phase. Molecular mechanisms of apoptosis and cell cycle arrest of SP2/0 induced by SAHA partly correlated with up-regulating the expression level of Caspase-3 and p53. In the non-aggressive myeloma-bearing mice, SP2/0 cells disappeared in peripheral blood after SAHA treatment. In the aggressive myeloma-bearing mice, inhibition of tumor growth and prolongation of the cell survival were observed after SAHA treatment. CONCLUSION SAHA inhibited SP2/0 cell proliferation, this effect associates with inducing apoptosis and cell cycle arrest, the mechanism of SAHA ralates partly with activating Caspase-3 and p53 pathway.
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Affiliation(s)
- Lei Huo
- Department of Hematology, Zhengzhou University People's Hospital,Zhengzhou 450003, Henan Province, China
| | - Chen-Yu Zhang
- Henan University School of Basic Medical Sciences,Kaifeng 475000, Henan Province, China
| | - Yi-Fang Dang
- Henan University School of Basic Medical Sciences,Kaifeng 475000, Henan Province, China
| | - Wan-Jun Zhang
- Department of Hematology, Zhengzhou University People's Hospital,Zhengzhou 450003, Henan Province, China
| | - Man-Man Liu
- Jinzhou Medical University, Jinzhou 121001, Liaoning Province, China
| | - Lu-She Liu
- Institute of Hematology, Zhengzhou University People's Hospital,Zhengzhou 450003, Henan Province, China
| | - Zun-Min Zhu
- Department of Hematology, Zhengzhou University People's Hospital,Zhengzhou 450003, Henan Province, China
| | - Na Fang
- Henan University School of Basic Medical Sciences,Kaifeng 475000, Henan Province, China
| | - Shao-Ping Ji
- Henan University School of Basic Medical Sciences,Kaifeng 475000, Henan Province, China
| | - Kai Sun
- Department of Hematology, Zhengzhou University People's Hospital,Zhengzhou 450003, Henan Province, China. E-mail:
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Lv LL, Yan ZH, Shi X, Liu RQ, Ling X, Ji SP, Zhang J, Li P, Cai YL, Chen LL, Chen XJ, Xie LX, Lu DD, Ding L, Xu QQ, Zhang Y, Yang XW, Jing J, Ying L, Yu CP, Chen JJ, Sun XD. [Recombinant human tumor necrosis factor receptor type Ⅱ-IgG Fc fusion protein for treatment of occupational medicamentosa-like dermatitis induced by trichloroethylene]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2017; 35:257-260. [PMID: 28614922 DOI: 10.3760/cma.j.issn.1001-9391.2017.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the efficacy and safety of the recombinant human tumor necrosis factor receptor Ⅱ-IgG Fc fusion protein (rhTNFR: Fc, etanercept) for the treatment of occupational medicamentosa-like dermatitis induced by trichloroethylene (OMLDT) . Methods: In September 2011 to February 2016, 12 patients with OMLDT were treated with etanercept 25 mg, subcutaneous injection, twice per week, doubling of first dose. The course of treatment was 6 weeks. The drug eruption area and severity index (DASI) score, the proportion of patients achieving a 50%, 75% and 90% reduction in DASI (DASI50, DASI75, DASI90) and the serum level of TNF-α were used to assess the efficacy at different times. Adverse reactions were also recorded and evaluated. The results were statistically analyzed by nonparametric Friedman test and repetitive measurement ANOVA using the software SPSS19.0. Results: After 4 weeks treatment, the DASI score decreased form 56.33±7.02 to 0.50±0.91 (P<0.01) . The DASI50, DASI75 and DASI90 were all increased to 12 (100%) . The serum level of TNF-α decreased form (43.74±41.62) pg/ml to (3.03±0.47) pg/ml (P<0.01) . Statistically significant difference was observed from the above indexes. There were no adverse reactions in clinical application. Conclusion: Recombinant human tumor necrosis factor receptor Ⅱ-IgG Fc fusion protein may be a safe and effective drug in the treatment of OMLDT.
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Affiliation(s)
- L L Lv
- Dermatology Department of Second Affiliated Hospital of Soochow University, Suzhou 215004, China
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Ji SP, Zhang Y, Van Cleemput J, Jiang W, Liao M, Li L, Wan Q, Backstrom JR, Zhang X. Disruption of PTEN coupling with 5-HT2C receptors suppresses behavioral responses induced by drugs of abuse. Nat Med 2006; 12:324-9. [PMID: 16474401 DOI: 10.1038/nm1349] [Citation(s) in RCA: 124] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Accepted: 11/29/2005] [Indexed: 11/09/2022]
Abstract
The widespread distribution of the tumor suppressor PTEN (phosphatase and tensin homolog deleted on chromosome 10) in the adult brain suggests its role in a broad range of brain functions. Here we show evidence supporting a physical interaction of PTEN with a region in the third intracellular loop (3L4F) of the serotonin 5-HT2C receptor (5-HT2cR, formerly 5-HT1c receptor) in cell cultures. PTEN limits agonist-induced phosphorylation of 5-HT2cR through its protein phosphatase activity. We showed the probable existence of PTEN:5-HT2cR complexes in putative dopaminergic neurons in the rat ventral tegmental area (VTA), a brain region in which virtually all abused drugs exert rewarding effects by activating its dopamine neurons. We synthesized the interfering peptide Tat-3L4F, which is able to disrupt PTEN coupling with 5-HT2cR. Systemic application of Tat-3L4F or the 5-HT2cR agonist Ro600175 suppressed the increased firing rate of VTA dopaminergic neurons induced by delta9-tetrahydrocannabinol (THC), the psychoactive ingredient of marijuana. Using behavioral tests, we found that Tat-3L4F or Ro600175 blocks conditioned place preference of THC or nicotine, and that Ro600175, but not Tat-3L4F, produces anxiogenic effects, penile erection, hypophagia and motor functional suppression. These results suggest a potential strategy for treating drug addiction with the Tat-3L4F peptide.
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Affiliation(s)
- Shao-Ping Ji
- Neuropsychiatry Research Unit, Department of Psychiatry, University of Saskatchewan, 103 Wiggins Road, Saskatoon, Saskatchewan, Canada S7N 5E4
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Jiang W, Zhang Y, Xiao L, Van Cleemput J, Ji SP, Bai G, Zhang X. Cannabinoids promote embryonic and adult hippocampus neurogenesis and produce anxiolytic- and antidepressant-like effects. J Clin Invest 2005; 115:3104-16. [PMID: 16224541 PMCID: PMC1253627 DOI: 10.1172/jci25509] [Citation(s) in RCA: 387] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2005] [Accepted: 08/09/2005] [Indexed: 11/17/2022] Open
Abstract
The hippocampal dentate gyrus in the adult mammalian brain contains neural stem/progenitor cells (NS/PCs) capable of generating new neurons, i.e., neurogenesis. Most drugs of abuse examined to date decrease adult hippocampal neurogenesis, but the effects of cannabis (marijuana or cannabinoids) on hippocampal neurogenesis remain unknown. This study aimed at investigating the potential regulatory capacity of the potent synthetic cannabinoid HU210 on hippocampal neurogenesis and its possible correlation with behavioral change. We show that both embryonic and adult rat hippocampal NS/PCs are immunoreactive for CB1 cannabinoid receptors, indicating that cannabinoids could act on CB1 receptors to regulate neurogenesis. This hypothesis is supported by further findings that HU210 promotes proliferation, but not differentiation, of cultured embryonic hippocampal NS/PCs likely via a sequential activation of CB1 receptors, G(i/o) proteins, and ERK signaling. Chronic, but not acute, HU210 treatment promoted neurogenesis in the hippocampal dentate gyrus of adult rats and exerted anxiolytic- and antidepressant-like effects. X-irradiation of the hippocampus blocked both the neurogenic and behavioral effects of chronic HU210 treatment, suggesting that chronic HU210 treatment produces anxiolytic- and antidepressant-like effects likely via promotion of hippocampal neurogenesis.
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Affiliation(s)
- Wen Jiang
- Neuropsychiatry Research Unit, Department of Psychiatry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Zhang J, Wang JC, Han YH, Wang LF, Ji SP, Liu SX, Liu XP, Yao LB. High expression of bcl-x(L) in K562 cells and its role in the low sensitivity of K562 to realgar-induced apoptosis. Acta Haematol 2005; 113:247-54. [PMID: 15983431 DOI: 10.1159/000084678] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2004] [Accepted: 10/26/2004] [Indexed: 11/19/2022]
Abstract
Arsenic compounds (As(2)O(3 )or()As(4)S(4)) have been used successfully for the treatment of acute promyelocytic leukemia (APL) for quite a long time. It has been noticed that the sensitivity to apoptosis induced by As(2)O(3 )varies among various leukemia cells. It was reported by several groups that As(2)O(3) could induce apoptosis in APL-derived NB4 cells at concentrations of 0.5-1 mumol/l, whereas in other leukemia cells like K562, As(2)O(3) has no effects at the same concentration. K562 cells undergo apoptosis only when the concentration of As(2)O(3 )is greater than 2 mumol/l. Another arsenic compound, realgar (As(4)S(4)), a traditional Chinese mineral medicine, has been used to treat APL effectively and demonstrated to have lower toxicity than As(2)O(3). It would be interesting to know whether NB4 and K562 cells will show different sensitivity to realgar as well and if there is a difference, what is the cellular mechanism of it. In our present study, K562 cells were much less sensitive than NB4 cells to apoptosis induced by realgar. We confirm that the expression of bcl-x(L) is significantly higher in K562 cells than that in NB4 cells and is not downregulated upon realgar treatment. K562 cells become sensitive to realgar at clinically acceptable concentrations when bcl-x(L) expression level is downregulated by transfecting bcl-x(L) antisense RNA vector into the cells. Our results suggest that the increased bcl-x(L) expression in K562 cells contributes to its insensitivity to realgar-induced apoptosis.
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Affiliation(s)
- Jing Zhang
- Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, China
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Jiang W, Van Cleemput J, Sheerin AH, Ji SP, Zhang Y, Saucier DM, Corcoran ME, Zhang X. Involvement of extracellular regulated kinase and p38 kinase in hippocampal seizure tolerance. J Neurosci Res 2005; 81:581-8. [PMID: 15948190 DOI: 10.1002/jnr.20566] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [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
The mechanisms underlying brain seizure tolerance, a phenomenon in which brief periods of seizures protect brain against the lethal effects of subsequent sustained seizures, are poorly understood. Because brain seizure tolerance and brain ischemia tolerance likely share certain common mechanisms, the recent evidence that activation of extracellular regulated kinase (ERK) and p38 kinase pathways plays a critical role in ischemic preconditioning suggests that a similar mechanism may underlie brain seizure tolerance. We investigated the hypothesis in a rat kainic acid preparation of seizure preconditioning and tolerance, which was established by induction of one episode of priming epileptic status lasting for 20 min on the first day and another episode of sustained epileptic status lasting for 2 hr on the second day. We observed that acute seizures lead to a rapid activation of ERK and p38 in the hippocampal CA3 area, the brain region most susceptible to the lethal effects of epileptic status. Pretreatment with the ERK inhibitor PD98059 and the p38 inhibitor SB203580 selectively reduces seizure-elicited activation of ERK and p38, respectively, and significantly reduces priming seizure-induced protection of CA3 neurons. These findings indicate that, similar to brain ischemia tolerance, brain seizure tolerance also involves the ERK and p38 signaling pathways.
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Affiliation(s)
- Wen Jiang
- Neuropsychiatry Research Unit, Department of Psychiatry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Deng YC, Wang JC, Liu XP, Ji SP, Yao LB. [Cloning tumor-related genes and tumor suppressor genes in glioma with polymerase chain reaction-based subtractive hybridization]. Ai Zheng 2005; 24:680-4. [PMID: 15946478] [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: 05/02/2023]
Abstract
BACKGROUND & OBJECTIVE Glioma is a common tumor in central nervous system with no specific clinical therapy. Its pathogenesis is unclear. This study was to clone tumor-related genes and tumor suppressor genes in glioma with polymerase chain reaction (PCR)-based subtractive hybridization, and to explore the molecular biological mechanism of tumorigenesis of glioma. METHODS mRNA was isolated from a sample of human glioma, and reversely transcribed into cDNA. PCR-based subtractive hybridization was used to clone tumor-related genes and tumor suppressor genes from it. RESULTS In tumor-related candidate gene group, phospho-protein enriched in astrocytes of 15 (PEA15) and homology of acid fibroblast growth factor (aFGF) were picked up. Whereas, in tumor suppressor gene group, interferon-induced protein 17 and ndr2 were picked up. ndr2 was widely expressed in normal brain tissue, but absent in glioma tissue. CONCLUSION ndr2 gene is a candidate tumor suppressor gene, and may play a role in tumorigenesis of glioma.
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Affiliation(s)
- Yan-Chun Deng
- Department of Neurology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
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Yang XL, Zhang YL, Yao LB, Liu XP, Ji SP, Xing FY. [Cloning, sequencing and bioinformatics analysis of a new tumor suppressor gene ndr2 from mouse]. Ai Zheng 2003; 22:230-4. [PMID: 12654175] [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: 03/01/2023]
Abstract
BACKGROUND & OBJECTIVE Ndr2 (N-myc down stream regulator) gene in human is a new gene cloned with the human adult whole brain cDNA as template in 1999, which accession number is AF159092 in GenBank. Locating backward position of the N-myc gene in human chromosome, this gene was named Ndr2 gene. The previous experimental results showed Ndr2 gene probably is a tumor suppressor gene. To research the function of Ndr2 gene, the authors cloned the genomic sequence of ndr2 from mouse. METHODS To clone Ndr2 genomic sequence by reverse transcription-polymerase chain reaction(RT-PCR) with the mouse genome library as template; automatic sequencing was performed using 310 Genetic Analyzer; homogeneous analysis was made using GenBank BLAST; open reading fragment(ORF) analysis was made using PC Gene and ORF Finder; domain analysis was made using ProDom system. RESULTS A fragment (about 3310bp,identified by agarose gel electrophoresis) was obtained using RT-PCR with the mouse genome library as template. The fragment was cloned in pMD18-T vector. BLAST analysis showed that the sequence was highly homogeneous (with the homogeneity rate of 91.4%) with Ndr2 gene in human and non-homogeneous with genomic sequence database in mouse. ORF analysis showed that there was a complete coding region in it, which including 8 extrons and 7 introns; it can interpret a protein containing about 200 amino acid residuals. ProDom analysis showed there was a domain like acyl carrier protein(ACP) in it. CONCLUSION The authors cloned Ndr2 gene in mouse and proved that the sequence is a new genome sequence in mouse genomic sequence database. At present, the genome sequence has been submitted to GenBank(the accession number: AY151387).
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Affiliation(s)
- Xing-Long Yang
- Department of Biochemistry and Molecular Biology, The Fourth Military Medical University, Xi'an, Shanxi, 710032, P.R.China
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Ji SP, Yao LB, Bai YJ, Wang JC, Liu XP, Su CZ. Binding of Insulin Receptor Substrate 1 PH Domain to Protein Kinase C. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 31:400-404. [PMID: 12114993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
To screen for novel ligands of insulin receptor substrate 1(IRS-1)PH domains, to investigate the role of the PH domains in signal transduction processes and to examine association of the PH domain with protein kinase C(PKC), rat liver was employed to clone the gene encoding for the PH domains. Total RNAs were isolated and purified from fresh liver and mRNAs were reversely transcribed into cDNAs. After PCR the fragments of the DNA were cloned into vector pUC19. The sequence of the fusion gene was confirmed by sequencing, and the gene was correctly expressed in E.coli as fusion protein with glutathione S- transferase(GST). The fusion protein was purified by glutathione agarose beads, then was incubated with the lysate of Jurkat cells. After SDS-PAGE, the proteins were transferred to PVDF membrane, and an anti-PKC antibody was used to detect binding between the PH domain with PKC. The sequence of the gene encoding for the PH domains was confirmed to be correct, and the PH domain was successfully expressed in E.coli JM 109 in soluble form. Western blots confirmed the binding of the PH domain with PKC in vitro. In conclusion, purified IRS-1 PH domain GST fusion protein was obtained and its biological activity was confirmed.
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Affiliation(s)
- Shao-Ping Ji
- Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an 710032, China.
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Shen L, Ji SP, Nie XY, Liu XP, Yao LB. Fusion Expression and Purification of OSBP PH Domain and Preliminary Analysis of Its Second Structure. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 33:703-706. [PMID: 12035066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Oxysterol binding protein (OSBP) is a regulator of oxysteroid metabolism. To investigate the function and the structure-function relationship of OSBP, the recombinant vector OSBP PH-pRSET-A was transformed into E.coli JM109(DE3), and the strain highly expressing soluble 6His-OSBP PH domain in minimal medium were obtained. The fusion protein was purified by Ni(2 )-NTA agarose beads. The secondary structure of the purified 6His-OSBP PH domain fusion protein was analysed by circular dichronism. The results indicated the PH domain was composed of alpha-helix 7.2%, beta-pleated sheets 71.1% and radom coil 21.7%.
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Affiliation(s)
- L Shen
- Department of Biochemstry and Molecular Biologhy, Fourth Military Medical University, Xi'an 710032, China.
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Ji SP, Zhang YP. Modulation of O6-methylguanine-DNA methyltransferase-mediated 1-(4-amino-2-methyl-5-Pyrimidinyl)- methyl-3-(2-Chloroethyl)-3-nitrosourea resistance by antisense RNA. Cancer Detect Prev 1999; 23:422-7. [PMID: 10468895 DOI: 10.1046/j.1525-1500.1999.99040.x] [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: 11/20/2022]
Abstract
Mer+ HeLa S3 tumor cells with high levels of O6-methylguanine-DNA methyltransferase (MGMT) gene expression were transduced by retroviral-mediated MGMT antisense RNA. The MGMT mRNA, MGMT protein, and MGMT activity in transduced cells were only 28.7%, 32.7%, and 39. 1% of that in HeLa S3 cells, respectively. The transduced cells showed more sensitive to ACNU than HeLa S3 cells both in cell survival and in nude mice experiments. Pathologic examination confirmed that transduced grafts were killed by ACNU. Our results suggested that MGMT gene expression could be modulated by retroviral-mediated antisense RNA and that Mer+ tumor drug resistance to ACNU could be reversed by modulation of MGMT gene expression.
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Affiliation(s)
- S P Ji
- Institute of Blood Transfusion Medicine, Beijing, China
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Zhang YP, Ji SP, Chen JM. [O6-methylguanine-DNA-methyltransferase and prediction of cancer chemotherapy]. Sheng Li Ke Xue Jin Zhan 1999; 30:279-82. [PMID: 12532798] [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: 02/28/2023]
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Ji SP. [The first isolation of Vibrio alginolyticus from samples which caused food poisoning]. Zhonghua Yu Fang Yi Xue Za Zhi 1989; 23:71-3. [PMID: 2737046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We report an event of food poisoning traced to eating salted shrimps. Vibrio alginolyticus was shown to be the causative agent through epidemiological investigations and etiological tests. Vibro alginolyticus can bring about human septicaemia and wound infection and it was found in the feces of patients with diarrhea, but no determination on its pathogenicity was done. From the samples of food which led to food poisoning. Vibrio alginolyticus was isolated, and for the first time it was determined as a pathogen of food poisoning.
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Ji SP. [The investigation and evaluation of a new kind of paper disk for rapid identification of E. coli groups]. Zhonghua Liu Xing Bing Xue Za Zhi 1987; 8:171-3. [PMID: 3308112] [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: 01/05/2023]
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