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Liu JT, Sun ZX, Zhong R, Zhang YD, Wang T, Hou YD, Bao JH, Zhang L, Chen B. ZNRF2 as an oncogene is transcriptionally regulated by CREB1 in breast cancer models. Hum Cell 2023:10.1007/s13577-023-00913-7. [PMID: 37165255 DOI: 10.1007/s13577-023-00913-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 04/29/2023] [Indexed: 05/12/2023]
Abstract
E3 ubiquitin ligase Zinc and Ring Finger 2 (ZNRF2) has been demonstrated to be engaged in the development of multiple cancers. Nevertheless, the function of ZNRF2 in breast cancer (BC) still unclear. In this work, we firstly analyzed the differentially expressed genes in BC by bioinformatics and found that ZNRF2 was highly expressed in BC. Consistently, we further confirmed that ZNRF2 was upregulated in BC tissues compared with adjacent normal tissues, and this was positively correlated with the poor prognosis and the higher pathological grades of patients with BC. Functional assays performed on HCC1937 and MCF-7 cells indicated that silencing of ZNRF2 suppressed cell proliferation, as evidenced by the decrease in the expression of cyclin A, PCNA and cyclin D1. Flow cytometry and Hoechst staining showed that knockdown of ZNRF2 induced cell apoptosis, which was verified by the upregulation of apoptosis genes such as Bax, cleaved PARP and Bim. ZNRF2 knockdown also inhibited in vivo tumor growth. But, instead, ZNRF2-overexpressed BC cells exhibited obvious malignant phenotypes. Additionally, we observed that cAMP response element binding protein 1 (CREB1) directly bound to the promoter sequence of ZNRF2 and thus activating its transcription, suggesting that ZNRF2 is transcriptionally regulated by CREB1. Additionally, ZNRF2 knockdown could reverse the proliferation-promoting action of CREB1 on BC cells, Hence, this study demonstrated that ZNRF2 might serve as a prospective therapeutic target for BC.
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Affiliation(s)
- Jin-Tao Liu
- Department of Thyroid Surgery, Dalian Municipal Central Hospital, Dalian, Liaoning, China
| | - Zhen-Xuan Sun
- Graduate School, Dalian Medical University, Dalian, Liaoning, China
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Rui Zhong
- Graduate School, Dalian Medical University, Dalian, Liaoning, China
| | - Yi-Dan Zhang
- Graduate School, Dalian Medical University, Dalian, Liaoning, China
| | - Teng Wang
- Graduate School, Dalian Medical University, Dalian, Liaoning, China
| | - Yu-Dong Hou
- Graduate School, China Medical University, Shenyang, Liaoning, China
| | - Jian-Heng Bao
- Graduate School, Dalian Medical University, Dalian, Liaoning, China
| | - Lei Zhang
- Department of Breast Surgery, The First Hospital of China Medical University, No. 155, Nanjing North Street, Shenyang, Liaoning, China.
| | - Bo Chen
- Department of Breast Surgery, The First Hospital of China Medical University, No. 155, Nanjing North Street, Shenyang, Liaoning, China.
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Cao SD, Li WM, Wei DM, Qian Y, Jiang H, Hou YD, Lei DP, Pan XL. [Implication of enhanced recovery after surgery in the surgical management of hypopharyngeal squamous cell carcinoma]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:216-220. [PMID: 33730803 DOI: 10.3760/cma.j.cn115330-20200507-00385] [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: 11/05/2022]
Abstract
Objective: To investigate the safety and efficacy of enhanced recovery after surgery (ERAS) in the clinical management of hypopharyngeal squamous cell carcinoma (HSCC). Methods: In this retrospective study, a total of 168 patients with pyriform sinus carcinoma in Qilu Hospital of Shandong University from January 2015 to January 2019 were divided into two groups, based on the different perioperative interventions that patients received, i.e. the ERAS group (n=64) and the conventional group (n=104), including 164 males and 4 females, whose ages ranged from 42 to 84 years old. The difference between two groups in the operative time, postoperative nutritional status, incidences of postoperative complications and postoperative hospitalization time were compared using the student's t test, Chi-squared test or Fisher's exact test. Results: Compared with the conventional group, patients in the ERAS group had significantly shorter operative time [(166.8±58.2) min vs. (183.3±39.9) min,t=-2.72, P=0.031], higher levels of postoperative serum albumin [(38.3±4.2) μmol/L vs. (36.6±3.3) μmol/L, t=2.73, P=0.007] and more body weight [(65.4±9.4) kg vs. (62.1±9.4) kg, t=2.22, P=0.028], lower incidences of postoperative subcutaneous infection [7.8% (5/64) vs. 20.2% (21/104), χ²=4.64, P=0.03] and severe pneumonia [4.7% (3/64) vs. 15.4% (16/104), χ²=4.52, P=0.03], and shorter postoperative hospitalization time [(16.5±3.9) d vs. (18.2±4.3) d, t=-2.65, P<0.05]. Conclusion: ERAS is effective and safe in the surgical management of HSCC, with benefits in reducing the operative stress via saving operation time, shortening the hospitalization time, ameliorating nutritional status and decreasing the incidences of complications.
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Affiliation(s)
- S D Cao
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, National Health Commission Key Laboratory of Otorhinolaryngology (Shandong University), Jinan 250012, China
| | - W M Li
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, National Health Commission Key Laboratory of Otorhinolaryngology (Shandong University), Jinan 250012, China
| | - D M Wei
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, National Health Commission Key Laboratory of Otorhinolaryngology (Shandong University), Jinan 250012, China
| | - Y Qian
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, National Health Commission Key Laboratory of Otorhinolaryngology (Shandong University), Jinan 250012, China
| | - H Jiang
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, National Health Commission Key Laboratory of Otorhinolaryngology (Shandong University), Jinan 250012, China
| | - Y D Hou
- Department of Anesthesia, Qilu Hospital of Shandong University, Jinan 250012, China
| | - D P Lei
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, National Health Commission Key Laboratory of Otorhinolaryngology (Shandong University), Jinan 250012, China
| | - X L Pan
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, National Health Commission Key Laboratory of Otorhinolaryngology (Shandong University), Jinan 250012, China
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Wang Y, Yang JB, Wang JF, Li LL, Wang M, Yang LJ, Tao LY, Chu J, Hou YD. Development of the Forensically Important Beetle Creophilus maxillosus (Coleoptera: Staphylinidae) at Constant Temperatures. J Med Entomol 2017; 54:281-289. [PMID: 28011726 DOI: 10.1093/jme/tjw193] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 10/17/2016] [Indexed: 06/06/2023]
Abstract
Creophilus maxillosus (L., 1758) is a common and widely distributed beetle species found on corpses, and its development duration is far longer than species belonging to the genus Calliphoridae and Sarcophagidae. Therefore, C. maxillosus can be used as a supplementary indicator to estimate minimum postmortem interval (PMImin), and could greatly extend the range of PMImin when the primary colonizers are no longer associated with the corpse or have emerged from pupae. Better descriptions of C. maxillosus development are needed to apply this species for forensic investigations. In this study, the development of C. maxillosus at seven constant temperatures ranging from 17.5-32.5 °C was studied. Through regression analyses, the simulation equations of larval body length variation with time after hatching were obtained. Isomegalen diagrams of the changes of larval body length over time at specific temperatures, and the isomorphen diagrams on the duration of different developmental milestones at specific temperatures were generated. In addition, thermal summation models of different developmental stages and the overall development process of C. maxillosus were generated through regression analysis, by estimating the development threshold temperatures (D0) and the thermal summation constants (K). These results provide important tools for forensic investigations to generate a long-range of PMImin estimation based on the development of C. maxillosus.
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Affiliation(s)
- Y Wang
- Department of Forensic Medicine, Soochow University, Ganjiang East Rd., Suzhou 215000, China (; ; ; ; )
| | - J B Yang
- Hebei Provincial Public Security Department, Bureau of Criminal Investigation, Zhongshan West Rd., Shijiazhuang 050000, China
| | - J F Wang
- Department of Forensic Medicine, Soochow University, Ganjiang East Rd., Suzhou 215000, China (; ; ; ; )
| | - L L Li
- Department of Forensic Medicine, Soochow University, Ganjiang East Rd., Suzhou 215000, China (; ; ; ; )
| | - M Wang
- Department of Entomology, College of Agriculture, South China Agricultural University, Wushan Rd., Guangzhou 510642, China
| | - L J Yang
- Department of Forensic Medicine, Soochow University, Ganjiang East Rd., Suzhou 215000, China (; ; ; ; )
| | - L Y Tao
- Department of Forensic Medicine, Soochow University, Ganjiang East Rd., Suzhou 215000, China (; ; ; ; )
| | - J Chu
- Criminal Police Branch, Suzhou Public Security Bureau, Renmin Rd., Suzhou 215000, China (; )
| | - Y D Hou
- Criminal Police Branch, Suzhou Public Security Bureau, Renmin Rd., Suzhou 215000, China (; )
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Shi LB, Hou YD, Shen JY, Wang GL. [Effects of tobacco on rat gingival fibroblats attaching to titanium]. Shanghai Kou Qiang Yi Xue 2009; 18:173-7. [PMID: 19417995] [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: 05/27/2023]
Abstract
PURPOSE The study was designed to observe the effects of the smokeless tobacco extract(ST) on the attachment,morphology,structure and proliferation of rat gingival fibroblasts(RGFs) to titanium in vitro. METHODS RGFs were obtained from explants of rat normal gingival tissues by using tissue-explant technique.The origin of cells was identified by immunochemistry of vimentin and cytokeratin. RGFs to titanium were cultured in the presence of ST at various concentration,the attachment and growth of cells attached to titanium were measured by MTT method, immunofluorescence was used to detect and analyze the shapes of RGFs attached to titanium.Statistical analysis was performed using SPSS13.0 software package for one-way ANOVA. RESULTS Immunochemical study showed that vimentin was expressed in RGFs while cytokeratin was negative,which indicated that RGFs were originated from mesoblastoma.With the increasing of ST concentration,the attachment,spreading shape and proliferation of RGFs in all groups decreased in a concentration-dependent manner.The difference between ST group and control group was statistically significant(P<0.05). CONCLUSIONS ST can inhibit the attachment,spreading shape and proliferation of RGFs, suggesting that smoking may have influence on the long result of oral implant operation.
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Affiliation(s)
- Ling-Bo Shi
- College of Stomatology, Binzhou Medical University, Yantai 264003, Shandong Province, China
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Hou YD, Wang XC, Wu L, Chen XF, Ding ZX, Wang XX, Fu XZ. N-doped SiO2/TiO2 mesoporous nanoparticles with enhanced photocatalytic activity under visible-light irradiation. Chemosphere 2008; 72:414-21. [PMID: 18423518 DOI: 10.1016/j.chemosphere.2008.02.035] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2007] [Revised: 02/14/2008] [Accepted: 02/14/2008] [Indexed: 05/05/2023]
Abstract
Mesoporous nanocrystalline N-doped SiO2/TiO2 visible-light photocatalysts were prepared by treating SiO2/TiO2 xerogels in a flow of nitrogen gas bubbled through concentrated ammonia solution. Structural characterization and performance analysis results revealed that the addition of SiO2 remarkably altered the phase composition, specific surface area, microstructure, as well as the photocatalytic activity of N-doped TiO2. The presence of SiO2 in N-doped TiO2 particles suppressed the formation of rutile phase and the crystal growth of N-doped TiO2 particles during thermal calcinations. When weight ratio of SiO2/TiO2 was in 0.05-0.20, the N-doped SiO2/TiO2 exhibited higher photocatalytic activity than the N-doped TiO2, and optimum ratio was found to be 0.05. The enhanced photocatalytic activity could be attributed to the higher specific area, larger pore volume, and more surface hydroxyl groups in the catalyst.
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Affiliation(s)
- Y D Hou
- Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, PR China
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Wang K, Chen LY, Wang B, Han LY, Hou YD. [Phenotype of peripheral blood mononuclear cells derived dendritic cells from patients with chronic hepatitis B.]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2006; 20:250-3. [PMID: 17086285] [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: 05/12/2023]
Abstract
BACKGROUND The aim of this study was to access phenotype changes of dendritic cells (DC) cultured from peripheral blood mononuclear cells (PBMC) in patients with chronic hepatitis B and to reveal the relationship between phenotype of DC and ALT or HBV DNA. METHODS Indices of ALT and serum HBV DNA were measured in 37 patients with chronic hepatitis B and 21 healthy controls. Peripheral blood mononuclear cells were isolated from all patients and healthy controls, and cultured with granulocyte-macrophage colony-stumilating factor (GM-CSF), interleukin-4 (IL-4) and tumor necrosis factor- (TNF-)in RPMI 1640 medium that contained 10% fetal calf serum. After culturing for 7 days, the DC was counted and the phenotypes were detected by FACS. Then the data were statistically analysed. RESULTS The DC was significantly fewer (P less than 0.05) in patients with chronic hepatitis B than the controls. In particular, the expressive level of CD83 and CD86 on DC's surface from patients with chronic hepatitis B were also significantly lower (P less than 0.05) than that from the controls. In the patients with hepatitis B, the indices of DC had a significantly negative correlation with the level of serum HBV DNA (P less than 0.05), but no significant relationship was found between ALT and indices of DC (P greater than 0.05). CONCLUSION The DC cultured from patients with chronic hepatitis B were few and had immature phenotype. These changes had a significantly negative correlation with the level of serum HBV DNA, but had not correlation with the inflammatory reaction levels in the liver. DC was associated with the clearance of HBV in patients with hepatitis B.
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Affiliation(s)
- K Wang
- Department of Liver Disease of Qilu Hospital, Shandong University, Jinan 250012, China. Corresponding author: WANG Kai, E-mail:
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Zeng GF, Zhang ZQ, Zhang LG, Chen AJ, Yao LH, Hou YD. [Cloning of VEGF receptor KDR and its expression in insect cells]. Sheng Wu Gong Cheng Xue Bao 2001; 17:140-4. [PMID: 11411219] [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: 02/20/2023]
Abstract
The cDNA fragment of the first 3 loops of VEGF receptor, KDR, was cloned by PCR and inserted into a baculovirus expression plasmid pFASTBACI. The competent E. coli DH10BAC cell, which contain another plasmid with baculovirus genome in it, was transformed with pFASTBACI-KDRn3. Homologous recombination in the prokaryotic cells resulted in a recombinant plasmid containing KDRn3 in baculovirus genome. Transfection of the insect cell SF-9 with above plasmid generated a recombinant baculorvirus contain target gene fragment. SDS-PAGE and Western blot analysis of the supernatant of the infected SF-9 cell showed that KDRn3 was secreted in the medium. The recombinant protein was verified with Western blot and tested for their binding activity with VEGF. Its anti-angiogenic activity was assayed on chorionic allantoic membrane(CAM) of fertilized egg. The results showed that the recombinant protein could inhibit new vessel formation on CAM of fertilized eggs.
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Affiliation(s)
- G F Zeng
- State Key Laboratory of Molecular Virology and Genetic Engineering, Beijing 100052, China
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Li J, Wang WL, Yang XK, Yu XX, Hou YD, Zhang J. Inducible overexpression of Bak sensitizes HCC-9204 cells to apoptosis induced by doxorubicin. Acta Pharmacol Sin 2000; 21:769-76. [PMID: 11501155] [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: 02/21/2023] Open
Abstract
AIM To investigate the role of overexpression of Bak in apoptotic pathways and drug susceptibility using doxorubicin and vinorelbine in human HCC-9204 cells. METHODS An inducible system, MT-II regulatory system which allowed controlled expression of protein upon addition of ZnSO4(100 mumol/L) as an external inducer was used. Stable transfection of pMD-Bak gene was performed on HCC-9204 cells. Apoptotic cells were measured by morphological criteria, as well as by TUNEL assay and flow cytometry. The ability of Bak to decrease clonogenic cell survival was studied by colony-forming assays, while decrease in cell viability was assessed by MTT assay. RESULTS Cells overexpressing Bak showed extensive cell death with nucleus fragmentation detected by TUNEL assay. FACS analyses showed that Bak could induce significant G1 accumulation and apoptosis in 19.29% cells 24 h after induction. Bak significantly decreased the clonogenic survival following exposure to adriamycin, but not vinorelbine. Furthermore, the time-course of cell viability rates following exposure of HCC-9204/Bak cells to adriamycin and vinorelbine was in agreement with the above findings. Bak selectively sensitized HCC-9204 cells to death induced by adriamycin while resisted to vinorelbine. CONCLUSION Bak may prolong cell cycle in G1 phase, leading to apoptosis and decrease clonogenic survival of HCC-9204 cells in a drug-specific manner.
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Affiliation(s)
- J Li
- Department of Pathology, Fourth Military Medical University, Xi-an 710032, China.
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Liang GD, Li L, Zhou GL, Fu SH, Li QP, Li FS, He HH, Jin Q, He Y, Chen BQ, Hou YD. Isolation and complete nucleotide sequence of a Chinese Sindbis-like virus. J Gen Virol 2000; 81:1347-51. [PMID: 10769078 DOI: 10.1099/0022-1317-81-5-1347] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [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: 11/18/2022] Open
Abstract
Infection with alphaviruses is common in the Chinese population. Here we report the isolation of a Sindbis-like virus from a pool of Anopheles mosquitoes collected in Xinjiang, China during an arbovirus survey. This virus, designated XJ-160, rapidly produced cytopathic effects on mosquito and hamster cells. In addition, it was lethal to neonatal mice if inoculated intracerebrally. Serologically, XJ-160 reacted with and was neutralized by an anti-Sindbis antibody. Anti-XJ-160 antibodies were found in several cohorts of Chinese subjects. The complete 11626-base nucleotide sequence of XJ-160 was determined. XJ-160 has diverged significantly from the prototype Sindbis virus, with an 18% difference in nucleotide sequence and an 8.6% difference in amino acids; there are 11 deletions and 2 insertions, involving 99 nucleotides in total. XJ-160 is most closely linked to Kyzylagach virus isolated in Azerbaijan. Both belong to the African/European genetic lineage of Sindbis virus, albeit more distantly related to other members.
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Affiliation(s)
- G D Liang
- State Key Laboratory for Molecular Virology and Genetic Engineering, Institute of Virology, Chinese Academy of Preventive Medicine, Beijing, People's Republic of China
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Jin DY, Wang HL, Zhou Y, Chun AC, Kibler KV, Hou YD, Kung H, Jeang KT. Hepatitis C virus core protein-induced loss of LZIP function correlates with cellular transformation. EMBO J 2000; 19:729-40. [PMID: 10675342 PMCID: PMC305611 DOI: 10.1093/emboj/19.4.729] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Hepatitis C virus (HCV) is the major etiological agent of blood-borne non-A non-B hepatitis and a leading cause of liver cirrhosis and hepatocellular carcinoma worldwide. HCV core protein is a multifunctional protein with regulatory functions in cellular transcription and virus-induced transformation and pathogenesis. Here we report on the identification of a bZIP nuclear transcription protein as an HCV core cofactor for transformation. This bZIP factor, designated LZIP, activates CRE-dependent transcription and regulates cell proliferation. Loss of LZIP function in NIH 3T3 cells triggers morphological transformation and anchorage-independent growth. We show that HCV core protein aberrantly sequesters LZIP in the cytoplasm, inactivates LZIP function and potentiates cellular transformation. Our findings suggest that LZIP might serve a novel cellular tumor suppressor function that is targeted by the HCV core.
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Affiliation(s)
- D Y Jin
- Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-0460, USA.
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Chen WQ, Ding YP, Zhang LL, Hou YD. Enhanced anti-tumor effect of an IFN-gamma-EGF fusion protein. Biomed Environ Sci 1997; 10:387-395. [PMID: 9448920] [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: 05/22/2023]
Abstract
The novel fusion proteins harboring human or mouse interferon combined with epidermal growth factor receptor binding domain were constructed using methods of genetic and protein engineering. The fusion proteins were assayed to retain complete antiviral activities. The EGF receptor binding moiety of the fusion proteins exhibited competitive binding against 125I-EGF for EGF receptors on A431 cells. The fusion proteins were shown to be more potent in inhibiting the growth of cultured target carcinoma cells than interferon-gamma alone. Experimental data derived from mouse B16 malignant melanoma models indicates that the weight of tumor in mice treated with IFN fusion proteins was significantly smaller than that of mice treated with interferon-gamma alone. The work here is unprecedented in the world and provides a reliable evidence to support the upcoming clinical employment of a class of interferons that specifically target tumor cell.
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Affiliation(s)
- W Q Chen
- National Laboratory of Molecular Virology and Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing, China
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Wang HL, Hou YD, Jin DY. Identification of a single genotype of hepatitis G virus by comparison of one complete genome from a healthy carrier with eight from patients with hepatitis. J Gen Virol 1997; 78 ( Pt 12):3247-53. [PMID: 9400975 DOI: 10.1099/0022-1317-78-12-3247] [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: 02/05/2023] Open
Abstract
Different isolates of a putative hepatitis virus called hepatitis GB virus C or hepatitis G virus (HGV) have been cloned recently from patients with hepatitis. This virus has also been found commonly in healthy carriers. We have cloned and sequenced a complete HGV genome, designated HGVCN, from a healthy Chinese blood donor. HGVCN shares 85.8-90.0% nucleotide sequence identity and 95.4-97.5% amino acid identity with the eight available full-length HGV genomes. Furthermore, the majority (82.8%) of the nucleotide substitutions found in HGVCN were synonymous and a fairly uniform distribution of changes was found across the entire genome without identification of any hypervariable region. When compared with the African isolates GBVC and GBVC-EA, the HGVCN-encoded polyprotein contained a 31 amino acid N-terminal extension which was predicted to be a defective core-like sequence. The sequences of the HGV E1 and E2 proteins displayed unique motifs and were highly conserved. Phylogenetic analysis revealed that all nine complete HGV isolates were closely related and that HGVCN grouped with the other Chinese HGV isolate (HGVC964). Taken together, our findings suggest that there is one single genotype of HGV and that the HGV genome cloned from the healthy carrier is not significantly different from those derived from patient sera.
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Affiliation(s)
- H L Wang
- Institute of Virology, Chinese Academy of Preventive Medicine, Beijing
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Zhou Y, Wan XY, Wang HL, Yan ZY, Hou YD, Jin DY. Bacterial scavengase p20 is structurally and functionally related to peroxiredoxins. Biochem Biophys Res Commun 1997; 233:848-52. [PMID: 9168946 DOI: 10.1006/bbrc.1997.6564] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Scavengase p20 was recently identified as a novel family of bacterial antioxidant enzymes possessing thioredoxin-linked thiol peroxidase activity. In this study, the Escherichia coli gene coding for scavengase p20 was isolated from three different strains and the nucleotide sequence was determined. Multiple alignment of amino acid sequence revealed that a previously unidentified Cys-61 is most conserved among all bacterial p20 scavengases and corresponds to the active site in the well-characterized peroxiredoxins. Phylogenetic analysis further supported that scavengase p20 is a novel subfamily of peroxiredoxins. Site-directed mutagenesis studies demonstrated that Cys-61 is indispensable for the antioxidant activities of scavengase p20. Taken together, our findings strongly suggest that the p20 scavengases are structurally and functionally related to peroxiredoxins.
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Affiliation(s)
- Y Zhou
- National Key Laboratory of Molecular Biology and Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing, People's Republic of China
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Abstract
A novel antioxidant enzyme designated scavengase p20 was identified in various pathogenic bacteria through database searching for sequences strikingly homologous to a recently discovered Escherichia coli thiol peroxidase p20. The direct biochemical evidence for the existence of scavengase p20 in Haemophilus influenzae, Streptococcus pneumoniae and Helicobacter pylori was provided by protein microsequencing and by in vitro assays for antioxidant activities. Overlapping genes encoding scavengase p20 and superoxide dismutase were recognized in H. pylori and their functional implications are discussed.
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Affiliation(s)
- X Y Wan
- National Key Laboratory of Molecular Biology and Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing
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Li MF, Zeng Q, Zhou Y, Guo HY, Hou YD. Cloning, sequencing and expression in E. coli of interferon-omega 1 gene. Sci China B 1993; 36:1361-6. [PMID: 8142025] [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: 01/29/2023]
Abstract
Human interferon omega 1 (huIFN-omega 1) gene was isolated and cloned from chromosome DNA derived from a Chinese fetal liver via polymerase chain reaction (PCR). By determining its nucleotide sequence we proved that the 88th codon should be GGA, coding for Gly. After engineering the original IFN-omega 1 gene clone to a form that may be expressed as a nonfused protein, we also took the IFN-omega 1 gene under the control of the PRPL promoter with an expression vector pBV220 in E. coli. The antivirus activity of the recombinant IFN-omega 1 is about 6.5 x 10(7) units/L CULTURE (OD600 = 0.75). Since IFN-omega 1 not only has antivirus activity but also shows considerably high homology with animal trophoblast proteins which have been proved antiluteolysins as a maternal recognition signal for pregnancy, we believe that study on it will be practically and theoretically significant.
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Affiliation(s)
- M F Li
- Institute of Virology, Chinese Academy of Preventive Medicine, National Laboratory of Molecular Virology, Beijing, PRC
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Jin DY, Xu RH, Zhou Y, Wang P, Hou YD. Synthesis and expression in Escherichia coli of a human neutrophil activating protein-1/interleukin-8 gene. Sci China B 1993; 36:1224-32. [PMID: 8136035] [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: 01/29/2023]
Abstract
The complete gene coding for human neutrophil activating protein-1/interleukin-8 was synthesized using a semi-chemical semi-enzymatic method. The synthetic gene was then overexpressed in Escherichia coli under the temperature-regulated control of the PRPL tandem promoters. As determined by SDS-PAGE and densitometry, the overexpressed protein comprised up to 18.5% and 10.9% of the total soluble protein in E. coli cells grown in shake flasks and in batch fermentation, respectively. The recombinant NAP-1/IL-8 was then purified to > 95% homogeneity by gel filtration and cation exchange chromatography. The purified protein appeared as a single band on the SDS-PAGE gel and possessed potent chemotactic activity in the concentration of < 10 ng/ml, as assayed by the agarose plate method. An early skin reactivity was also observed when the pure NAP-1/IL-8 was injected subcutaneously into the rabbits. The N-terminal 36 amino acid sequence of the recombinant NAP-1/IL-8 was determined using the Edman method and was shown to be identical to that of the native protein.
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Affiliation(s)
- D Y Jin
- National Laboratory of Molecular Virology & Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing
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18
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Shu LL, Feng HM, Jin Q, Hou YD. Molecular cloning of a new variant of human papillomavirus type 6 isolated from a Chinese woman and expression of its L1 gene in E. coli--molecular cloning & expression of HPV6 gene. Sci China B 1992; 35:585-91. [PMID: 1318719] [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: 12/26/2022]
Abstract
A human papillomavirus genome DNA of 7.9 kb from a Chinese woman with genital condyloma acuminata was cloned in BamHI site of pAT153. According to the results obtained from Southern blotting, restriction mapping as well as partial DNA sequencing, the isolated genome (HPV6BV) had obvious variance and was referred to as a new variant of HPV6 found in China the first time. HPV6BV L1 gene was successfully expressed in E. coli as a fusion protein with pUR288. The beta-galactosidase/L1 fusion protein reacted with both beta-galactosidase antiserum and HPV antibody using Western blot technique. The E. coli-produced fusion protein, possessing HPV antigenicity, may provide a reagent for clinical diagnosis and epidemiological survey.
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Affiliation(s)
- L L Shu
- National Laboratory of Molecular Virology and Genetic Engineering, Beijing, PRC
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19
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Li MF, Jin Q, Hu G, Guo HY, Hou YD. A novel variant of human interferon alpha 1 gene. Sci China B 1992; 35:200-6. [PMID: 1581005] [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: 12/27/2022]
Abstract
A 520-base pair human IFN-alpha gene was isolated by PCR method twice from chromosome DNA of a Chinese (Han Nationality) fetal liver. The nucleotide sequences were determined. These two separately amplified DNA fragments shared the completely identical nucleotide sequence but possessed C and G at positions 410 and 541, respectively, which differ from those of IFN-alpha 1 and IFN-alpha D previously described. Therefore the deduced amino acid sequence would have an Ala at position 114 and a Val at position 158. At all other sites it has the same amino acids as those in IFN-alpha 1 and IFN-alpha D. We recommend that IFN-alpha D gene, IFN-alpha I gene and IFN-alpha I/158V gene found in our laboratory, be named IFN-alpha 1a gene, IFN-alpha 1b gene and IFN-alpha 1c gene.
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Affiliation(s)
- M F Li
- Institute of Virology, Chinese Academy of Preventive Medicine, Beijing
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20
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Wang XM, Li YY, Jin Q, Zhang ZQ, Hou YD. A new human interferon-gamma mutant harboring EGF receptor-interfering sequence possesses high antiproliferative activity. Sci China B 1992; 35:84-91. [PMID: 1580998] [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: 12/27/2022]
Abstract
An interferon gamma (IFN-gamma) mutant gene harboring an additional epidermal growth factor (EGF) sequence at its 3' terminal was constructed and highly expressed in E. coli by using pBV220 as a vector. The new fusion protein-IFN-gamma-EGF possesses not only high antiviral activity, but also high antiproliferative effect as demonstrated by 3H-TdR incorporation method using CN II cells which are rich in EGF receptors.
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Affiliation(s)
- X M Wang
- National Laboratory of Molecular Virology and Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing
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21
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Jin Q, Jin DY, Hou YD. The vaccinia virus HindIII K fragment encodes a novel protein belonging to the serpin superfamily. Sci China B 1990; 33:453-9. [PMID: 2372373] [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: 12/31/2022]
Abstract
The 1983-base pair nucleotide sequence of the EcoRI-HindIII fragment of vaccinia virus Tiantan strain HindIII K clone is determined by the dideoxy chain termination method. A search in the NBRF protein sequence database using FASTA and other microcomputer programs reveals that several proteins belonging to the serpin (serine protease inhibitor) superfamily have striking similarities to the protein encoded by the HindIII K1 ORF. On the basis of the dot-matrix analysis and sequence alignment, the K1-encoded protein is shown as a novel member of the serpin superfamily. The putative reactive site and switch sequence of this novel serpin are then compared with those of other serpins. The probable evolutionary and possible functional relationships are discussed.
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Affiliation(s)
- Q Jin
- National Laboratory of Molecular Virology and Virus Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing
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22
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Abstract
Striking similarities between vaccinia virus hemagglutinin (VVHA) and proteins belonging to the Ig superfamily clearly indicate that VVHA, a 315-amino acid glycoprotein expressed on the surface of the infected cells, is a novel viral protein that can be added to the expanding list of the Ig superfamily. Its deduced amino acid sequence contains one Ig-like domain at the NH2 terminus, followed by two tandem repeating units and a hydrophobic region, suggestive of membrane spanning. The results offer an opportunity for the further study of the probable evolutionary and possible functional relationship between VVHA and other members of the Ig superfamily. Our observation, together with a recent finding that human CMV possibly encodes a protein similar to the MHC class I antigens (13), provides evidence supporting the fact that the viral capture of cellular Ig-related genes is more common than expected in vaccinia and other viruses, and that usage of an Ig-like domain as recognition signals might be extended from higher animals to animal viruses.
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Affiliation(s)
- D Y Jin
- Institute of Virology, Chinese Academy of Preventive Medicine, Beijing
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23
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Hou YD, Jia SR, Dong QJ. [Autotransplantation of the traumatized spleen: a report of 20 cases]. Zhonghua Wai Ke Za Zhi 1985; 23:617-8, 638-9. [PMID: 3830635] [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: 01/07/2023]
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24
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Zhao XX, Chang CY, Hu G, Zhang XZ, Hou YD. [Studies on expression of the human IFN-alpha D genome in mouse L cells]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:398-401. [PMID: 6242538] [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: 01/19/2023]
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25
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Lin JX, Hou YD, Duan SM. [A comparative study on the characterization of IFN gene expression of 2 human cell lines with different IFN-inducing abilities]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:244-8. [PMID: 6084558] [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: 01/18/2023]
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26
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Hou YD. [Study on the biologically active constituents of Astragalus membranaceus]. Zhong Xi Yi Jie He Za Zhi 1984; 4:420-4. [PMID: 6237798] [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: 01/19/2023]
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27
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Peng JZ, Wu SH, Zhang LL, Hou YD, Colby B. [Studies on inhibitory effects of nIFNs and rIFNs in combination with antiviral drugs on adenovirus multiplication]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:116-9. [PMID: 6085759] [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: 01/18/2023]
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28
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Lu CD, Lou YC, Li BL, Wang CY, Liu XY, Wang DB, Hou YD, Zhang ZQ, Yang XK. [Analysis of human leukocyte interferon gene cloned in plasmid p8218]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1984; 6:1-4. [PMID: 6094029] [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: 01/18/2023]
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29
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Yang CT, Yang R, Hou YD. Interferon activity produced by interferon messenger RNA in Tilapiamosaiabica peters oocytes. Microbiologica 1983; 6:261-75. [PMID: 6198582] [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: 01/18/2023]
Abstract
The activities of interferon mRNA from various types of mouse cells have been studied using Tilapiamosaiabica peters oocytes (TPO) as the translation system. The translation activity of interferon mRNA in TPO was also compared with that in Xenopus laevis oocytes (XLO). The results obtained showed similar translation efficiency in both systems. The highest translation efficiency was observed when T. peters oocytes, microinjected with mRNA, were cultivated in Eagle's medium containing 0.01% HEPES and 0.5% NaHCO3 (pH 7.5) at 25 degrees C. pppA2' P5' A2' P5' A in concentration of 500 nM did not affect the translation of interferon mRNA in oocytes, but inhibition was demonstrated at 1 microM. A linear relationship was found between the amount of interferon mRNA injected and the antiviral activity of the translation products, suggesting that the amount of interferon mRNA can be determined by assaying the interferon activity of its translation product.
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30
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Chang CY, Hou YD, Xu FM. [Effects of Astragalus membranaceus on enhancement of mouse natural killer cell activity]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1983; 5:231-4. [PMID: 6197202] [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: 01/18/2023]
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31
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Cheng YH, Yu XF, Liu FY, Han SL, Hou YD. [Effects of tilorone on experimental rat silicosis]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1983; 5:25-8. [PMID: 6194906] [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: 01/18/2023]
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32
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Zhao XX, Hou YD, Su XL, Liu XY. [Biological activities of pppA2'p5'A2'p5'A]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1982; 4:367-71. [PMID: 6303612] [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: 01/19/2023]
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33
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Hou YD, Zhang ZQ, Yang XK, Mu SH, Li YY, Peng JZ, Li Y, Yang CT, Fu QL, Hu YW. [Cloning of alpha interferon cDNA from human umbilical cord leukocytes and its expression in Escherichia coli]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1982; 4:327-35. [PMID: 6221811] [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: 01/19/2023]
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34
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Hou YD, Yang CT, Zhang ZQ, Duan SM, Su XL, Wu SH, Li YY. [Studies on the selection and characterization of virus-resistant L cell lines with changes in interferon gene expression]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1981; 3:213-8. [PMID: 6173139] [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: 01/18/2023]
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35
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Hou YD, Ma GL, Wu SH, Li YY, Li HT. Effect of Radix Astragali seu Hedysari on the interferon system. Chin Med J (Engl) 1981; 94:35-40. [PMID: 6164521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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36
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Li YY, Liu XY, Shi LY, Li Y, Hou YD. [Induction characteristic of lymphoblastoid interferon (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1980; 2:250-3. [PMID: 6171357] [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: 01/18/2023]
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37
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Wu SH, Hou YD, Li LW, Yang CT, Peng JZ, Zhang LL, Zhang XZ, Fu QL, Zhao HY, Wang LZ. [Preparation and purification of human leukocyte interferons (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1980; 2:98-102. [PMID: 6159118] [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: 01/18/2023]
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38
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Wu SH, Li YY, Hou YD, Peng JZ, Zhang XZ, Zhang LL, Liu XR, Shi LY. [Some factors affecting the superinduction of interferon in human diploid cell cultures (author's transl)]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1979; 1:13-20. [PMID: 95588] [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: 12/13/2022]
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