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Liao LY, Liu M, Zhang YP, Yin YX, Wei XH, Gao LB, Zhou R. [Circular RNA expression profiles and circRNA-miRNA-mRNA crosstalk in pre-eclamptic placenta]. Zhonghua Fu Chan Ke Za Zhi 2023; 58:430-441. [PMID: 37357602 DOI: 10.3760/cma.j.cn112141-20230206-00044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Objective: To identify the expression profile of circular RNA (circRNA) in placenta of pre-eclampsia (PE) pregnant women by high-throughput sequencing, and to construct the circRNA-microRNA (miRNA)-messenger RNA (mRNA) interaction network, so as to reveal the related pathways and regulatory mechanisms of PE. Methods: The clinical data and placentas of 42 women with PE (PE group) and 30 normal pregnant women (control group) who delivered in West China Second University Hospital from November 2019 to June 2021 were collected. (1) High-throughput sequencing was used to establish the differentially expressed circRNA profiles in placental tissues of 5 pairs of PE group and the control group. (2) Real-time quantitative PCR (qRT-PCR) was used to verify the expression levels of 6 differentially expressed circRNAs in placental tissues of PE group and control group. (3) Bioinformatics analysis was used to predict the target miRNA and analyze the co-expressed mRNA to construct a competitive endogenous RNA (ceRNA) network. The differentially expressed circRNAs were analyzed by Gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) pathways. (4) Logistic regression analysis, Pearson correlation and Kendall's tau-b correlation analysis were used to test the correlation between the three differentially expressed circRNAs and the risk of PE and clinical characteristics. (5) circRNA_05393 was selected for subsequent functional study. Small interfering RNA (siRNA) and overexpression plasmid were used to knock down or increase the expression level of circRNA_05393 in trophoblast cell line HTR-8/SVneo cells, respectively. Transwell assay was used to detect the migration and invasion ability of the trophoblasts in vitro. Cell counting kit-8 assay was used to detect the proliferation ability of the trophoblasts. Results: (1) Seventy-two differentially expressed circRNAs were identified by high-throughput sequencing, of which 35 were up-regulated and 37 were down-regulated. (2) qRT-PCR showed that compared with the control group, circRNA_00673 (1.306±0.168 vs 2.059±0.242; t=2.356, P=0.021) and circRNA_07796 (1.275±0.232 vs 1.954±0.230; t=2.018, P=0.047) were significantly increased, while circRNA_05393 (1.846±0.377 vs 0.790±0.094; t=3.138, P=0.002) was significantly decreased. (3) The circRNA-miRNA-mRNA interaction network contained 3 circRNAs, 8 miRNAs and 53 mRNAs. GO functional annotation analysis showed that the biological process was mainly enriched in iron ion homeostasis, membrane depolarization during action potential and neuronal action potential. In terms of cellular components, they were mainly enriched in cytoskeleton and membrane components. In terms of molecular function, they were mainly enriched in the activity of voltage-gated sodium channel and basic amino acid transmembrane transporter. KEGG pathway enrichment analysis showed that mRNAs in the interaction network were mainly enriched in complement and coagulation cascade, glycine, serine and threonine metabolism, p53 signaling pathway and peroxisome proliferators-activated receptors (PPAR) signaling pathway. (4) Logistic regression analysis showed that down-regulation of circRNA_05393 expression was a risk factor for PE (OR=0.044, 95%CI: 0.003-0.596; P=0.019). Correlation analysis showed that circRNA_05393 was significantly correlated with systolic blood pressure and diastolic blood pressure in PE pregnant women (both P<0.05). (5) Knock down or overexpression of circRNA_05393 significantly reduced or increased the migration and invasion abilities of HTR-8/SVneo cells (all P<0.05), but had no significant effect on the ability of tube formation and proliferation (all P>0.05). Conclusions: The construction of circRNA expression profile in placenta and the exploration of circRNA-miRNA-mRNA interaction network provide the possibility to reveal the regulatory mechanism of specific circRNA involved in PE. Inhibition of circRNA_05393 may induce the progression of PE by reducing the migration and invasion of trophoblasts.
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Affiliation(s)
- L Y Liao
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University; Ministry of Education Key Laboratory of Birth Defects and Related Diseases of Women and Children; National Health Commission Key Laboratory of Chronobiology, Chengdu 610041, China
| | - M Liu
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University; Ministry of Education Key Laboratory of Birth Defects and Related Diseases of Women and Children; National Health Commission Key Laboratory of Chronobiology, Chengdu 610041, China
| | - Y P Zhang
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University; Ministry of Education Key Laboratory of Birth Defects and Related Diseases of Women and Children; National Health Commission Key Laboratory of Chronobiology, Chengdu 610041, China
| | - Y X Yin
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University; Ministry of Education Key Laboratory of Birth Defects and Related Diseases of Women and Children; National Health Commission Key Laboratory of Chronobiology, Chengdu 610041, China
| | - X H Wei
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University; Ministry of Education Key Laboratory of Birth Defects and Related Diseases of Women and Children; National Health Commission Key Laboratory of Chronobiology, Chengdu 610041, China
| | - L B Gao
- Laboratory of Molecular and Translational Medicine, West China Second University Hospital, Sichuan University; Ministry of Education Key Laboratory of Birth Defects and Related Diseases of Women and Children; National Health Commission Key Laboratory of Chronobiology, Chengdu 610041, China
| | - R Zhou
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University; Ministry of Education Key Laboratory of Birth Defects and Related Diseases of Women and Children; National Health Commission Key Laboratory of Chronobiology, Chengdu 610041, China
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Yang DK, Liao LY, Li YH, Zhong GQ, Zhang XJ, Zhang W, Hao BL, Hu LQ, Wan BN, Hu ZM, Zhang YM, Gorini G, Nocente M, Tardocchi M, Li XQ, Xiao CJ, Fan TS. Simulations of neutral beam injection and ion cyclotron resonance heating synergy in high power EAST scenarios. Rev Sci Instrum 2022; 93:113501. [PMID: 36461431 DOI: 10.1063/5.0101645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/28/2022] [Indexed: 06/17/2023]
Abstract
The EAST plasmas heated with deuterium neutral beam injection and ion cyclotron resonance heating (ICRH) have been simulated by the TRANSP code. The analysis has been conducted using the full wave solver TORIC5, the radio frequency (RF)-kick operator, and NUBEAM to model the RF heating effects on fast ion velocity distribution. In this work, we present several simulated results compared with experiments for high power EAST scenarios, indicating that the interactions between ICRH and fast ions can significantly accelerate fast ions, which are confirmed by the increased neutron yield and broadened neutron emission spectrum measurements.
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Affiliation(s)
- D K Yang
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - L Y Liao
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Y H Li
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - G Q Zhong
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - X J Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - W Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - B L Hao
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Z M Hu
- Interdisciplinary InnoCentre for Nuclear Technology, Nanjing University, Nanjing 211106, Jiangsu, China
| | - Y M Zhang
- China Academy of Engineering Physics, Mianyang 621900, Sichuan, China
| | - G Gorini
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano 20126, Italy
| | - M Nocente
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano 20126, Italy
| | - M Tardocchi
- Institute for Plasma Science and Technology, National Research Council, Milan 20125, Italy
| | - X Q Li
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - C J Xiao
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - T S Fan
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
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3
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Bai H, Han L, Feng XY, Zhou YJ, Su RX, Wang Q, Liao LY, Zhu WX, Chen XZ, Pan F, Fan XL, Song C. Observation of Spin Splitting Torque in a Collinear Antiferromagnet RuO_{2}. Phys Rev Lett 2022; 128:197202. [PMID: 35622053 DOI: 10.1103/physrevlett.128.197202] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 02/22/2022] [Accepted: 04/15/2022] [Indexed: 06/15/2023]
Abstract
Current-induced spin torques provide efficient data writing approaches for magnetic memories. Recently, the spin splitting torque (SST) was theoretically predicted, which combines advantages of conventional spin transfer torque (STT) and spin-orbit torque (SOT) as well as enables controllable spin polarization. Here we provide the experimental evidence of SST in collinear antiferromagnet RuO_{2} films. The spin current direction is found to be correlated to the crystal orientation of RuO_{2} and the spin polarization direction is dependent on (parallel to) the Néel vector. These features are quite characteristic for the predicted SST. Our finding not only presents a new member for the spin torques besides traditional STT and SOT, but also proposes a promising spin source RuO_{2} for spintronics.
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Affiliation(s)
- H Bai
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - L Han
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - X Y Feng
- The Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Y J Zhou
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - R X Su
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Q Wang
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - L Y Liao
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - W X Zhu
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - X Z Chen
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - F Pan
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - X L Fan
- The Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - C Song
- Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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4
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Yang DK, Zhang YM, Xiao M, Hu ZM, Liao LY, Sun JQ, Zhong GQ, Hu LQ, Wan BN, Gorini G, Nocente M, Tardocchi M, Xiao CJ, Fan TS. Neutron emission and fast ion simulation for high performance long pulses at EAST. Rev Sci Instrum 2021; 92:043552. [PMID: 34243473 DOI: 10.1063/5.0043797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/05/2021] [Indexed: 06/13/2023]
Abstract
Neutron emission spectroscopy and neutron yield measurements are important for high neutral beam injection (NBI) power heating at the Experimental Advanced Superconducting Tokamak (EAST). The neutron yields mainly depend on the deposition from NBI to the deuterium plasmas in the EAST. We have recently used TRANSP with time dependent diagnostic results to simulate the transport process of 30 s long pulse deuterium plasma discharges in the EAST, obtaining the time dependent fast ion distribution, neutron emission spectrum, and total neutron emission rate. Combined with the time trace of the result measured by a standard 235U fission chamber, the effects of different configurations of NBI heating in EAST fusion plasmas have been evaluated.
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Affiliation(s)
- D K Yang
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Y M Zhang
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - M Xiao
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Z M Hu
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - L Y Liao
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J Q Sun
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - G Q Zhong
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - G Gorini
- Dipartimento di Fisica 'G. Occhialini', Università degli Studi di Milano-Bicocca, Milano 20126, Italy
| | - M Nocente
- Dipartimento di Fisica 'G. Occhialini', Università degli Studi di Milano-Bicocca, Milano 20126, Italy
| | - M Tardocchi
- Institute for Plasma Science and Technology, National Research Council, Milan 20125, Italy
| | - C J Xiao
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - T S Fan
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
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Liao LY, Zhang YM, Hu ZM, Yang DK, Ge LJ, Sun JQ, Zhong GQ, Hu LQ, Wan BN, Gorini G, Nocente M, Tardocchi M, Li XQ, Fan TS. A compact stilbene crystal neutron spectrometer for NBI-heated plasma neutron diagnostics at EAST. Rev Sci Instrum 2021; 92:043506. [PMID: 34243369 DOI: 10.1063/5.0043617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 03/11/2021] [Indexed: 06/13/2023]
Abstract
Stilbene crystal detectors are widely used as fast neutron measurement tools based on recoil proton detection, such as liquid scintillators. A compact stilbene crystal neutron spectrometer (CSCNS) has been installed at the Experimental Advanced Superconducting Tokamak (EAST) to obtain information on fuel ions produced in the plasma core because of its merits of good n/γ discrimination capability, high detection efficiency, and fast response. For the first time, CSCNS has been used for neutron emission spectroscopy measurements in EAST plasmas with neutral beam injection (NBI) heating. The CSCNS has the same horizontal line of sight as the time-of-flight enhanced diagnostics neutron spectrometer. Under NBI heating scenarios, the time trace of the neutron yield monitored by the CSCNS is similar to the one monitored by a standard 235U fission chamber. The experimental pulse height spectra are also similar to the simulated ones generated by folding the simulated neutron energy spectrum with the detector response functions. These results demonstrate the capability of the CSCNS for neutron diagnostics and the study of fast-ion physics in EAST.
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Affiliation(s)
- L Y Liao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Y M Zhang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Z M Hu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - D K Yang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - L J Ge
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - J Q Sun
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - G Q Zhong
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - G Gorini
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano 20126, Italy
| | - M Nocente
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano 20126, Italy
| | - M Tardocchi
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano 20126, Italy
| | - X Q Li
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - T S Fan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
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6
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Qiu YB, Liao LY, Jiang R, Xu M, Xu LW, Chen GG, Liu ZM. PES1 promotes the occurrence and development of papillary thyroid cancer by upregulating the ERα/ERβ protein ratio. Sci Rep 2019; 9:1032. [PMID: 30705367 PMCID: PMC6355968 DOI: 10.1038/s41598-018-37648-7] [Citation(s) in RCA: 10] [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: 04/23/2018] [Accepted: 12/07/2018] [Indexed: 02/07/2023] Open
Abstract
PES1, a BRCT domain-containing protein, has been shown to play a role in modulating the balance and ratio between ERα and ERβ protein, which is involved in the occurrence and development of breast and ovarian cancer. However, its role in connection with the balance and ratio between ERα and ERβ protein in papillary thyroid cancer (PTC) remains unclear. Here, we found that ERα and ERβ were co-expressed in human PTC tissues and cells. ERα promoted and ERβ inhibited the proliferation, invasion and migration of PTC cells. PES1 modulated the balance between ERα and ERβ by elevating the ERα protein level and simultaneously reducing the ERβ protein level, then upregulating the ERα/ERβ protein ratio and promoting the proliferation, invasion and migration of PTC cells. In PTC tissues, PES1 protein level was positively correlated with the ERα protein level and negatively correlated with the ERβ protein level. The PES1 and ERα protein levels were gradually increased and the ERβ protein level was decreased by degree in the occurrence and development of PTC. Increased PES1 and ERα protein levels and decreased ERβ protein level were correlated with the aggressive behaviors of PTC patients such as large tumor size, extrathyroidal extension (ETE), lymph node metastasis (LNM), high BRAFV600E expression and high TNM stage. It is suggested that PES1 promotes the occurrence and development of PTC by elevating the ERα protein level and reducing the ERβ protein level, and then upregulating the ERα/ERβ protein ratio.
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Affiliation(s)
- Yi-Bo Qiu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Ling-Yao Liao
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Rong Jiang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Man Xu
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Lin-Wan Xu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - George G Chen
- Department of Surgery, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T., Hong Kong, China
| | - Zhi-Min Liu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China.
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Fu J, Deng HY, Hu ML, Liao LY, Li YK. [Relationships between serum cystatin C, chemerin levels and subclinical atherosclerosis in type 2 diabetes mellitus patients]. Zhonghua Yi Xue Za Zhi 2019; 99:307-311. [PMID: 30669719 DOI: 10.3760/cma.j.issn.0376-2491.2019.04.014] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the relationships between serum cystatin C (Cys C), chemerin levels and subclinical atherosclerosis in type 2 diabetes mellitus (T2DM) patients. Methods: A cross-sectional study was carried out between January 2016 and January 2018, and T2DM patients with carotid intima-media thickness (IMT) less than 1.1 mm were selected as subjects (100 males and 80 females, aged 40-60 years). The brachial-ankle pulse wave velocity (baPWV) ≥ 1 700 cm/s was set as the observation group (subclinical atherosclerosis) and baPWV<1 700 cm/s as the control group (non-subclinical atherosclerosis). Physical and blood examination were performed in both groups. Serum Cys C and chemerin levels were measured and their relationship with subclinical atherosclerosis was analyzed. Results: There was a statistically significant correlation between serum creatinine (r=0.167, P=0.011) and baPWV in the observation group, but not in the control group (r=0.105, P=0.070). Multiple linear regression analysis showed that age, duration of diabetes, serum creatinine, estimated glomerular filtration rate (eGFR), Cys C and chemerin were independently associated with baPWV, while high sensitive C reactive protein (hsCRP) and glycosylated hemoglobin (HbA1c) were not associated with baPWV. The elevation of serum Cys C (β'=0.393, P=0.003) and chemokine (β'=0.340, P=0.007) were correlative factors for atherosclerosis. Conclusion: The level of serum Cys C and chemerin is possibly related to the occurrence and development of subclinical atherosclerosis in T2DM patients.
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Affiliation(s)
- J Fu
- Department of Endocrinology, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430033, China
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Di Taranto G, Elia R, Pafitanis G, Amorosi V, Liao LY, Chen SH, Chen HC. Late occurrence of squamous cell carcinoma arising from skin-lining flap. Microsurgery 2018; 39:96-97. [PMID: 30508320 DOI: 10.1002/micr.30400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/15/2018] [Accepted: 10/24/2018] [Indexed: 11/10/2022]
Affiliation(s)
- G Di Taranto
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan.,Department of Plastic and Reconstructive Surgery, Sapienza University of Rome, Umberto I University Hospital, Rome, Italy
| | - R Elia
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan.,Division of Plastic and Reconstructive Surgery, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - G Pafitanis
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan.,Group for Academic Plastic Surgery, Queen Mary University of London, The Royal London Hospital, Barts Health NHS Trust, London, United Kingdom
| | - V Amorosi
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan.,Plastic Surgery Unit, Sant'Andrea Hospital, School of Medicine and Psychology, "Sapienza" Rome, Rome, Italy
| | - L Y Liao
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan.,Department of Plastic Surgery, Chang Gung Memorial Hospital, Taiwan
| | - S-H Chen
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan.,Department of Plastic Surgery, Chang Gung Memorial Hospital, Taiwan
| | - Hung-Chi Chen
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan
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Di Taranto G, Elia R, Amorosi V, Alamouti R, Sitpahul N, Chan JCY, Liao LY, Ribuffo D, Chen HC. The difference in the caliber of efferent lymphatic vessels among various lymph node flaps. J Surg Oncol 2018; 118:1212-1213. [PMID: 30332501 DOI: 10.1002/jso.25257] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 08/06/2018] [Indexed: 01/04/2023]
Affiliation(s)
- G Di Taranto
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
- Department of Plastic and Reconstructive Surgery; Sapienza University of Rome, Umberto I University Hospital; Rome Italy
| | - R Elia
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
- Division of Plastic and Reconstructive Surgery, Department of Emergency and Organ Transplantation; University of Bari; Bari
| | - V Amorosi
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
- Plastic Surgery Unit, Sant’Andrea Hospital, School of Medicine and Psychology, “Sapienza” Rome; Rome Italy
| | - R Alamouti
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
- Department of Plastic and Reconstructive Surgery; The Royal London Hospital, Barts health NHS Trust; London UK
| | - N Sitpahul
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
- Faculty of Medicine Ramathibodi Hospital, Department of Plastic and Maxillofacial Surgery, Mahidol University; Bangkok Thailand
| | - JCY Chan
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
| | - LY Liao
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
| | - D Ribuffo
- Department of Plastic and Reconstructive Surgery; Sapienza University of Rome, Umberto I University Hospital; Rome Italy
| | - HC Chen
- Department of Plastic Surgery; China Medical University Hospital; Taichung Taiwan
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10
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Dai YJ, Qiu YB, Jiang R, Xu M, Liao LY, Chen GG, Liu ZM. Concomitant high expression of ERα36, GRP78 and GRP94 is associated with aggressive papillary thyroid cancer behavior. Cell Oncol (Dordr) 2018; 41:269-282. [PMID: 29368272 DOI: 10.1007/s13402-017-0368-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2017] [Indexed: 10/18/2022] Open
Abstract
PURPOSE Papillary thyroid cancer (PTC) is more common in women than in men. It has been suggested that estrogen may be involved in its development, as has previously been shown for breast, endometrial and ovarian cancer. The purpose of this study was to assess correlations between the expression of the estrogen receptor alpha36 (ERα36) and the glucose regulated proteins GRP78 and GRP94 (chaperones involved in glycoprotein folding) and various PTC clinicopathological features, as well as to evaluate the potential usefulness of these three potential oncogenic proteins in the prediction of aggressive PTC behavior. METHODS ERα36, GRP78 and GRP94 protein expression in 218 primary PTC tissues and PTC-derived BCPAP cells was examined using immunohistochemistry, Western blotting and immunocytochemistry. The proliferative, invasive and migrative capacities of BCPAP cells in which the respective genes were either exogenously over-expressed or silenced were assessed using BrdU incorporation and Transwell assays, respectively. RESULTS We found that ERα36, GRP78 and GRP94 protein expression was upregulated in the primary PTC tissues tested. We also found that ERα36, GRP78 and GRP94 expression modulation affected the proliferation, invasion and migration of PTC-derived BCPAP cells. A positive correlation and a positive feedback loop were noted between ERα36, GRP78 and GRP94 protein expression in the primary PTC tissues and in BCPAP cells, respectively. High ERα36 expression in combination with a high GRP78/ GRP94 expression was found to have a stronger correlation with extrathyroid extension (ETE), lymph node metastasis (LNM), distant metastasis (DM) and high TNM stage than high ERα36 expression in combination with either high GRP78 or high GRP94 expression (p = 0.028 for ETE, p = 0.002 for DM and p ≤ 0.001 for LNM and high TNM stage) or high ERα36 expression alone (p < 0.001 for ETE, LNM, DM and high TNM stage). CONCLUSIONS From our data we conclude that a concomitant high expression of ERα36, GRP78 and GRP94 is strongly associated with aggressive PTC behavior and may be used as a predictor for ETE, LNM, DM and high TNM stage.
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Affiliation(s)
- Yu-Jie Dai
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, China
| | - Yi-Bo Qiu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, China
| | - Rong Jiang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Man Xu
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Ling-Yao Liao
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, China
| | - George G Chen
- Department of Surgery, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T, Hong Kong, China
| | - Zhi-Min Liu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, China.
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Zhu P, Liao LY, Zhao TT, Mo XM, Chen GG, Liu ZM. GPER/ERK&AKT/NF-κB pathway is involved in cadmium-induced proliferation, invasion and migration of GPER-positive thyroid cancer cells. Mol Cell Endocrinol 2017; 442:68-80. [PMID: 27940299 DOI: 10.1016/j.mce.2016.12.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 12/07/2016] [Accepted: 12/08/2016] [Indexed: 02/06/2023]
Abstract
The higher incidence of thyroid cancer in women during reproductive years compared with men and the increased risk associated with the therapeutic use of estrogen have strongly suggested that estrogen may be involved in the occurrence and development of thyroid cancer. Cadmium (Cd) is a potent metalloestrogen that disrupts the endocrine system by mimicking the effects of 17β-estradiol (E2). In the present study, we demonstrate that similar to E2 and G1, a specific agonist for G protein-coupled estrogen receptor (GPER), Cd induces the proliferation, invasion and migration of human WRO and FRO thyroid cancer cells that have endogenous GPER. Moreover, like E2 and G1, Cd leads to a rapid activation of ERK/AKT, and then nuclear translocation of NF-κB, increased expression of cyclin A and D1, and secretion of IL-8, all of which are significantly attenuated by GPER blockage or knock-down in both WRO and FRO cells. Furthermore, the Cd-induced proliferation, invasion and migration are suppressed either by specific inhibitors for GPER, ERK, AKT and NF-κB, or by knock-down of GPER. These results suggest that GPER/ERK&AKT/NF-κB signaling pathway is involved in the Cd-induced proliferation, invasion and migration of GPER-positive thyroid cancer cells.
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Affiliation(s)
- Ping Zhu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Ling-Yao Liao
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Ting-Ting Zhao
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Xiao-Mei Mo
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - George G Chen
- Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T., Hong Kong, China
| | - Zhi-Min Liu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China.
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12
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Mo XM, Li L, Zhu P, Dai YJ, Zhao TT, Liao LY, Chen GG, Liu ZM. Up-regulation of Hsp27 by ERα/Sp1 facilitates proliferation and confers resistance to apoptosis in human papillary thyroid cancer cells. Mol Cell Endocrinol 2016; 431:71-87. [PMID: 27179757 DOI: 10.1016/j.mce.2016.05.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 04/15/2016] [Accepted: 05/10/2016] [Indexed: 02/07/2023]
Abstract
17β-estradiol (E2) has been suggested to play a role in the development and progression of papillary thyroid cancer. Heat shock protein 27 (Hsp27) is a member of the Hsp family that is responsible for cell survival under stressful conditions. Previous studies have shown that the 5'-promoter region of Hsp27 gene contains a specificity protein-1 (Spl) and estrogen response element half-site (ERE-half), which contributes to Hsp27 induction by E2 in breast cancer cells. However, it is unclear whether Hsp27 can be up-regulated by E2 and which estrogen receptor (ER) isoform and tethered transcription factor are involved in this regulation in papillary thyroid cancer cells. In the present study, we demonstrated that Hsp27 can be effectively up-regulated by E2 at mRNA and protein levels in human K1 and BCPAP papillary thyroid cancer cells which have more than two times higher level of ERα than that of ERβ. The up-regulation of Hsp27 by E2 is mediated by ERα/Sp1 and ERβ has repressive effect on this ERα/Sp1-mediated up-regulation of Hsp27. Moreover, we showed that the up-regulation of Hsp27 by ERα/Sp1 facilitates proliferation and confers resistance to apoptosis through interaction with procaspase-3. Targeting this pathway may be a potential strategy for therapy of papillary thyroid cancer.
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Affiliation(s)
- Xiao-Mei Mo
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Li Li
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Ping Zhu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Yu-Jie Dai
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Ting-Ting Zhao
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - Ling-Yao Liao
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China
| | - George G Chen
- Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T., Hong Kong, China
| | - Zhi-Min Liu
- Department of Biochemistry and Molecular Biology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, China.
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13
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Huang WS, Liao LY, Wang CS, Chen PH. Hepatocellular carcinoma presenting with acquired porphyria: a case report and review of the literature. Changgeng Yi Xue Za Zhi 1999; 22:111-6. [PMID: 10418219] [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: 02/13/2023]
Abstract
Hepatocellular carcinoma (HCC) with acquired porphyria is a very rare condition. It is characterized variably by hyperpigmentation, skin fragility and photodistributed subepidermal vesicles. The serum, urine and/or stool porphyrin levels, usually markedly elevated, can change according to the clinical course. We report here a case of hepatocellular carcinoma presenting with a paraneoplastic syndrome of acquired porphyria. A 73-year-old Chinese woman had the characteristic facial pigmentation of cutaneous porphyria and histologically proven hepatocellular carcinoma. Her serum zinc protoporphyrin was elevated and her urine tested positive for coproporphyrin. Her protoporphyrin and alpha-fetoprotein levels dropped after transarterial chemoembolization treatment. Acquired porphyria in hepatocellular carcinoma occurs exclusively in older persons with huge hepatocellular carcinoma and/or cirrhosis. Before diagnosis, it must be carefully differentiated from inherent porphyrias with HCC, and porphyrias induced by drugs or heavy metal intoxication must be ruled out.
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Affiliation(s)
- W S Huang
- Department of Gastroenterology, Chang Gung Memorial Hospital, Kaohsiung, Taipei Municipal Jen-Ai Hospital, Taiwan, R.O.C
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14
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Liu JD, Leung KW, Wang CK, Liao LY, Wang CS, Chen PH, Chen CC, Yeh EK. Alcohol-related problems in Taiwan with particular emphasis on alcoholic liver diseases. Alcohol Clin Exp Res 1998; 22:164S-169S. [PMID: 9622397 DOI: 10.1111/acer.1998.22.s3_part1.164s] [Citation(s) in RCA: 7] [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] [Indexed: 11/29/2022]
Abstract
Socioeconomic development has led to a progressive increase of alcohol consumption in Taiwan, with an accompanying increase in alcohol-related psychiatric problems, traffic accidents, and liver disease. The prevalent rates of alcohol dependence for Han Chinese and Fomosan aborigines were 0.1% and 1%, respectively in 1950. The rate of alcohol dependence increased to 23% for aborigines in 1995. The number of cases of death and serious injuries due to alcohol-related traffic accident has decreased, and the number of fatalities resulting from these accidents has decreased from third to eighth since the inception of a program of random traffic stops with alcohol breath test in 1997. Alcohol liver disease (ALD) was defined as daily alcohol consumption of 60 g, for a duration of longer than 5 years. We classified ALD patients into two groups: (1) those whose average daily consumption of alcohol exceeded 120 g for a duration longer than 15 years (group A); and (2) all other patients (group B). The case records of 33 cases of biopsy-confirmed ALD were obtained for study. The average of daily alcohol consumption in these cases was 160 g. All but one of these patients were male, age ranged from 26 to 69 years, with an average of 43.1. Clinically, ill-defined gastrointestinal symptoms were the most common presentation (61%), and hepatomegaly was the main physical sign (73%). The average mean corpuscular volume values of ALD and non-ALD patients were 102.3 +/- 10.94 and 94.5 +/- 8.1, respectively (p < 0.01). The mean corpuscular volume values of group A and group B were 102.9 +/- 9.7 vs. 96.5 +/- 9.11 (p < 0.05). Result from serum SGOT/SGPT and gamma-glutamyltransferase/alkaline phosphatase for ALD and non-ALD revealed statistically significant differences between these groups. Using the avidin-biotin complex technique, tissue IgA deposition for ALD patients was found to be different from that of non-ALD patients. Ten of 13 ALD patients vs. 2 of 13 non-ALD patients had continuous-form IgA deposition. Histologically, 45.5% of ALD patients had alcoholic cirrhosis, whereas alcoholic hepatitis was present in only 9.1% of patients. Overall, 88% of cases showed various severity of fatty metamorphosis.
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Affiliation(s)
- J D Liu
- Department of Medicine, Taipei Medical College Hospital, Taiwan
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15
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Tsai MS, Cheng NY, Wang CK, Liao LY, Wang CS. Anticardiolipin antibody-related Budd-Chiari syndrome: report of a case. Kaohsiung J Med Sci 1998; 14:48-52. [PMID: 9519690] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
We report a case of a 37-year-old female who suffered from upper abdominal pain, progressive abdominal distention, shortness of breath, palpitation and pitting edema of lower legs for more than one month. Abdominal sonography showed small caliber of hepatic veins, mild hepatosplenomegaly and moderate ascites. Computed tomography of abdomen disclosed extensive thrombi in bilateral femoral veins, ovarian veins and inferior vena cava. Ascites was transudate with normal cell count. Laboratory data showed hypoalbuminemia, mild elevation of total bilirubin and iron deficiency anemia. Anti-cardiolipin antibody was positive and antinuclear antibody was negative. The histopathological features, including sinusoidal dilatation with atrophic change of adjacent hepatocytes, slight congestion and hemosiderin-like material within the cytoplasm of Kupffer cells, were compatible with the criteria of Budd-Chiari syndrome. Heparin was intravenously administered immediately to prevent further progression of thrombosis. The ascites was successfully controlled with diuretics (spironolactone and furosemide). After a two-week course of treatment, she was discharged in good condition and on warfarin anti-coagulant medication.
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Affiliation(s)
- M S Tsai
- Department of Internal Medicine, Taipei Municipal Jen-Ai Hospital, Taiwan, Republic of China
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16
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Chen RC, Wang CK, Chiang LC, Lo HY, Duh SJ, Chen WT, Tu HY, Liao LY, Wang CS, Chen PH. Intra-arterial carbon dioxide-enhanced ultrasonogram of hepatocellular carcinoma treated by transcatheter arterial embolization and percutaneous ethanol injection therapy. J Gastroenterol Hepatol 1998; 13:41-6. [PMID: 9737570 DOI: 10.1111/j.1440-1746.1998.tb00543.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
The purpose of this study was to investigate the value of carbon dioxide-enhanced ultrasonography (CO2-US) in the evaluation of viable hepatocellular carcinomas (HCC) which were treated by transcatheter arterial embolization (TAE), percutaneous ethanol injection (PEI), or a combination treatment (TAE and PEI). Forty-one patients with 66 HCC were included in the study. They underwent CO2-US and angiography were performed in all tumours after they were treated by TAE, PEI or a combination treatment. Forty-six tumours were positively enhanced by CO2-US and 40 of them were positive by angiography. These 46 tumours were proved to be viable tumours either by biopsy or by follow-up studies. The positive predictive value was 100% for CO2-US and 87.8% in angiography. Twenty tumours were negative by CO2-US and these were also negative by angiography. Carbon dioxide-enhanced ultrasonography is a more reliable method for detecting the viable portion of the treated HCC compared with conventional angiography.
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Affiliation(s)
- R C Chen
- Department of Radiology, Taipei Municipal Jen-Ai Hospital, Taiwan
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17
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Wang CK, Liu JD, Lin SY, Liao LY, Cheng NY, Wang CS, Siauw CP, Chen PH. Drug-induced liver disease--a review of 14 cases. Gaoxiong Yi Xue Ke Xue Za Zhi 1995; 11:213-9. [PMID: 7602656] [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: 01/26/2023]
Abstract
The clinical and pathological features of 14 cases of acute drug-induced liver disease (DILD) were analyzed using the French group method for drug reaction assessment. Among them, 8 were of the cytotoxic type, 4 were of the cholestatic type and 2 were of the mixed type. Serum alkaline phosphatase (ALP) levels of the cytotoxic type DILD were all < 1.8 times the normal value, while those of the cholestatic type DILD > 1.8 times (P < 0.05). The alanine aminotransaminase and aspartate aminotransaminase (ALT and AST) levels of the cholestatic type were all < 13.1 times the normal value, while those of the cytotoxic type varied from 2.2 to 118 times the normal value. We found that steatosis was the major feature in the cytotoxic type with ALT and AST < 2.5 times the normal value. Piecemeal necrosis was noted only in all the cases with ALT and AST > 20 times the normal value. In the cholestatic type, the pathological features of the oral contraceptive-related DILD showed mainly cholestasis, whereas chlorpromazine-related DILD revealed additional portal inflammation. Meticulous taking of patient history and clinical assessment are mandatory for the diagnosis of DILD. The ALP levels were helpful in distinguishing different types of DILD. There are some correlations between biochemical changes and pathological features, and both are helpful in distinguishing different etiologies of DILD when the inciting drug is in doubt.
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Affiliation(s)
- C K Wang
- Department of Internal Medicine, Taipei Municipal Jen-Ai Hospital, Taiwan, Republic of China
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18
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Yan BS, Liao LY, Leou K, Chang YC, Syu WJ. Truncating the putative membrane association region circumvents the difficulty of expressing hepatitis C virus protein E1 in Escherichia coli. J Virol Methods 1994; 49:343-51. [PMID: 7532651 DOI: 10.1016/0166-0934(94)90149-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The putative E1 of hepatitis C virus (HCV) was expressed in Escherichia coli using a glutathione-S-transferase (GST) fusion protein system. The full length E1 protein is difficult to express. A series of E1 DNA fragments was generated and used for expression vector construction. Fusion proteins containing the E1 C-terminal region could not be expressed. When this region was truncated, the fusion proteins were synthesized to high levels. The possibility of this C-terminal region hampering the production of fusion protein was further explored. A construct with this segment directly fused to the C-terminus of GST indeed generated no detectable recombinant protein. According to the predicted structure of E1, this region may have membrane-associating properties. The expression results suggest a general approach to facilitate the production of viral membrane proteins in prokaryotes. Furthermore, these recombinant E1 proteins generated as antigens were used for Western blotting with sera from HCV-infected individuals. It was found that E1 is antigenic during HCV natural infection.
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Affiliation(s)
- B S Yan
- Graduate Institute of Microbiology and Immunology, National Yang-Ming Medical College, Taiwan, ROC
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