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Zuo B, Wang LL, Mao L, Xu GE, Sun SP, Lu W. [Analysis of phenotype and pathogenic variant in a case of Heimler syndrome]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2024; 59:249-252. [PMID: 38561264 DOI: 10.3760/cma.j.cn115330-20240117-00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Affiliation(s)
- B Zuo
- Department of Otorhinolaryngology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - L L Wang
- Department of Otorhinolaryngology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - L Mao
- Precision Medicine Center, Academy of Medical Sciences, Zhengzhou University, Zhengzhou 450052, China
| | - G E Xu
- Precision Medicine Center, Academy of Medical Sciences, Zhengzhou University, Zhengzhou 450052, China
| | - S P Sun
- Department of Otorhinolaryngology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - W Lu
- Department of Otorhinolaryngology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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Liang S, Zheng R, Zuo B, Li J, Wang Y, Han Y, Dong H, Zhao X, Zhang Y, Wang P, Meng R, Jia L, Yang A, Yan B. SMAD7 expression in CAR-T cells improves persistence and safety for solid tumors. Cell Mol Immunol 2024; 21:213-226. [PMID: 38177245 PMCID: PMC10901810 DOI: 10.1038/s41423-023-01120-y] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 12/03/2023] [Indexed: 01/06/2024] Open
Abstract
Despite the tremendous progress of chimeric antigen receptor T (CAR-T) cell therapy in hematological malignancies, their application in solid tumors has been limited largely due to T-cell exhaustion in the tumor microenvironment (TME) and systemic toxicity caused by excessive cytokine release. As a key regulator of the immunosuppressive TME, TGF-β promotes cytokine synthesis via the NF-κB pathway. Here, we coexpressed SMAD7, a suppressor of TGF-β signaling, with a HER2-targeted CAR in engineered T cells. These novel CAR-T cells displayed high cytolytic efficacy and were resistant to TGF-β-triggered exhaustion, which enabled sustained tumoricidal capacity after continuous antigen exposure. Moreover, SMAD7 substantially reduced the production of inflammatory cytokines by antigen-primed CAR-T cells. Mechanistically, SMAD7 downregulated TGF-β receptor I and abrogated the interplay between the TGF-β and NF-κB pathways in CAR-T cells. As a result, these CAR-T cells persistently inhibited tumor growth and promoted the survival of tumor-challenged mice regardless of the hostile tumor microenvironment caused by a high concentration of TGF-β. SMAD7 coexpression also enhanced CAR-T-cell infiltration and persistent activation in patient-derived tumor organoids. Therefore, our study demonstrated the feasibility of SMAD7 coexpression as a novel approach to improve the efficacy and safety of CAR-T-cell therapy for solid tumors.
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Affiliation(s)
- Sixin Liang
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
- School of Medicine Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, China
| | - Rui Zheng
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Baile Zuo
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
- School of Medicine Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, China
| | - Jia Li
- Department of Obstetrics and Gynecology, Xijing Hospital of Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Yiyi Wang
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Yujie Han
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
- School of Medicine Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, China
| | - Hao Dong
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
- School of Medicine Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, China
| | - Xiaojuan Zhao
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Yiting Zhang
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Pengju Wang
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Ruotong Meng
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
- College of Life Science, Yan'an University, Yan'an, Shaanxi, 716000, China
| | - Lintao Jia
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
| | - Angang Yang
- Department of Immunology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
| | - Bo Yan
- State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
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Zuo B, Wang L, Li X, Li X, Wang J, Xiong Y, Lei J, Zhang X, Chen Y, Liu Q, Jiao J, Sui M, Fan J, Wu N, Song Z, Li G. Abnormal low expression of SFTPC promotes the proliferation of lung adenocarcinoma by enhancing PI3K/AKT/mTOR signaling transduction. Aging (Albany NY) 2023; 15:12451-12475. [PMID: 37955668 PMCID: PMC10683597 DOI: 10.18632/aging.205191] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 10/03/2023] [Indexed: 11/14/2023]
Abstract
The abnormality of surfactant protein C (SFTPC) has been linked to the development of a number of interstitial lung diseases, according to mounting evidence. Nonetheless, the function and mechanism of SFTPC in the biological progression of lung adenocarcinoma (LUAD) remain unclear. Analysis of public datasets and testing of clinical samples suggested that SFTPC expression was abnormally low in LUAD, which was associated with the onset and poor prognosis of LUAD. The SFTPC-related risk score was derived using least absolute shrinkage and selection operator Cox regression as well as multivariate Cox regression. The risk score was highly correlated with tumor purity and tumor mutation burden, and it could serve as an independent prognostic indicator for LUAD. Low-risk LUAD patients may benefit more from CTLA-4 or/and PD-1 inhibitors. Overall, the risk score is useful for LUAD patient prognostication and treatment guidance. Moreover, in vitro and in vivo experiments demonstrated that SFTPC inhibits the proliferation of LUAD by inhibiting PI3K/AKT/mTOR signaling transduction. These results reveal the molecular mechanism by which SFTPC inhibits the proliferation of LUAD and suggest that SFTPC could be a new therapeutic target for LUAD.
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Affiliation(s)
- Baile Zuo
- Henan Key Laboratory of Immunology and Targeted Drugs, School of Medical Technology, Xinxiang Medical University, Xinxiang, Henan, China
| | - Lin Wang
- Department of Geriatrics, Xijing Hospital, The Air Force Military Medical University, Xi’an, Shaanxi, China
| | - Xiaoyan Li
- Department of Blood Transfusion, Shanxi Provincial People’s Hospital, Affiliate of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xin Li
- Department of Geriatric Medicine, Shanxi Provincial People’s Hospital, Affiliate of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Jinping Wang
- Department of Ultrasound, Shanxi Provincial People’s Hospital, Affiliate of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yanlu Xiong
- Department of Thoracic Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Jie Lei
- Department of Thoracic Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Xi Zhang
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Yifan Chen
- College of Management, Zhejiang Shuren University, Hangzhou, Zhejiang, China
| | - Qiongwen Liu
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, Henan, China
| | - Jinke Jiao
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, Henan, China
| | - Mengru Sui
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, Henan, China
| | - Jinhan Fan
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, Henan, China
| | - Ningxue Wu
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, Henan, China
| | - Zewen Song
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Guoyin Li
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, Henan, China
- MOE Key Laboratory of Modern Teaching Technology, Center for Teacher Professional Ability Development, Shaanxi Normal University, Xi’an, Shaanxi, China
- Academy of Medical Science, Zhengzhou University, Zhengzhou, Henan, China
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Zhao H, Zhang J, Fu X, Mao D, Qi X, Liang S, Meng G, Song Z, Yang R, Guo Z, Tong B, Sun M, Zuo B, Li G. Integrated bioinformatics analysis of the NEDD4 family reveals a prognostic value of NEDD4L in clear-cell renal cell cancer. PeerJ 2021; 9:e11880. [PMID: 34458018 PMCID: PMC8378337 DOI: 10.7717/peerj.11880] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 07/07/2021] [Indexed: 12/20/2022] Open
Abstract
The members of the Nedd4-like E3 family participate in various biological processes. However, their role in clear cell renal cell carcinoma (ccRCC) is not clear. This study systematically analyzed the Nedd4-like E3 family members in ccRCC data sets from multiple publicly available databases. NEDD4L was identified as the only NEDD4 family member differentially expressed in ccRCC compared with normal samples. Bioinformatics tools were used to characterize the function of NEDD4L in ccRCC. It indicated that NEDD4L might regulate cellular energy metabolism by co-expression analysis, and subsequent gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis. A prognostic model developed by the LASSO Cox regression method showed a relatively good predictive value in training and testing data sets. The result revealed that NEDD4L was associated with biosynthesis and metabolism of ccRCC. Since NEDD4L is downregulated and dysregulation of metabolism is involved in tumor progression, NEDD4L might be a potential therapeutic target in ccRCC.
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Affiliation(s)
- Hui Zhao
- Department of Urology, Affiliated Hospital of Weifang Medical University, Weifang, China.,Department of Urology, China Rehabilitation Research Centre, Rehabilitation School of Capital Medical University, Beijing, China
| | - Junjun Zhang
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Xiaoliang Fu
- Department of Urology, The Second Affiliated Hospital of Air Force Medical University, Xian, China
| | - Dongdong Mao
- Department of Urology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Xuesen Qi
- Department of Urology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Shuai Liang
- Department of Urology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Gang Meng
- Department of Urology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Zewen Song
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Ru Yang
- Henan Key Laboratory of Neurorestoratology, The First Affliated Hospital of Xinxiang Medical University, Weihui, China
| | - Zhenni Guo
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, China
| | - Binghua Tong
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, China
| | - Meiqing Sun
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, China
| | - Baile Zuo
- Tumor Molecular Immunology and Immunotherapy Laboratory, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Guoyin Li
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, China.,Academy of Medical Science, Zhengzhou University, Zhengzhou, China
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Zheng G, Guo Z, Li W, Xi W, Zuo B, Zhang R, Wen W, Yang AG, Jia L. Interaction between HLA-G and NK cell receptor KIR2DL4 orchestrates HER2-positive breast cancer resistance to trastuzumab. Signal Transduct Target Ther 2021; 6:236. [PMID: 34158475 PMCID: PMC8219715 DOI: 10.1038/s41392-021-00629-w] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/29/2021] [Accepted: 05/07/2021] [Indexed: 12/12/2022] Open
Abstract
Despite the successful use of the humanized monoclonal antibody trastuzumab (Herceptin) in the clinical treatment of human epidermal growth factor receptor 2 (HER2)-overexpressing breast cancer, the frequently occurring drug resistance remains to be overcome. The regulatory mechanisms of trastuzumab-elicited immune response in the tumor microenvironment remain largely uncharacterized. Here, we found that the nonclassical histocompatibility antigen HLA-G desensitizes breast cancer cells to trastuzumab by binding to the natural killer (NK) cell receptor KIR2DL4. Unless engaged by HLA-G, KIR2DL4 promotes antibody-dependent cell-mediated cytotoxicity and forms a regulatory circuit with the interferon-γ (IFN-γ) production pathway, in which IFN-γ upregulates KIR2DL4 via JAK2/STAT1 signaling, and then KIR2DL4 synergizes with the Fcγ receptor to increase IFN-γ secretion by NK cells. Trastuzumab treatment of neoplastic and NK cells leads to aberrant cytokine production characterized by excessive tumor growth factor-β (TGF-β) and IFN-γ, which subsequently reinforce HLA-G/KIR2DL4 signaling. In addition, TGF-β and IFN-γ impair the cytotoxicity of NK cells by upregulating PD-L1 on tumor cells and PD-1 on NK cells. Blockade of HLA-G/KIR2DL4 signaling improved the vulnerability of HER2-positive breast cancer to trastuzumab treatment in vivo. These findings provide novel insights into the mechanisms underlying trastuzumab resistance and demonstrate the applicability of combined HLA-G and PD-L1/PD-1 targeting in the treatment of trastuzumab-resistant breast cancer.
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Affiliation(s)
- Guoxu Zheng
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Zhangyan Guo
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Weimiao Li
- Department of Oncology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Wenjin Xi
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Baile Zuo
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Rui Zhang
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Weihong Wen
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - An-Gang Yang
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China.
| | - Lintao Jia
- State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, China.
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Li G, Xie Q, Yang Z, Wang L, Zhang X, Zuo B, Zhang S, Yang A, Jia L. Sp1-mediated epigenetic dysregulation dictates HDAC inhibitor susceptibility of HER2-overexpressing breast cancer. Int J Cancer 2019; 145:3285-3298. [PMID: 31111958 DOI: 10.1002/ijc.32425] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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] [Received: 12/19/2018] [Revised: 04/23/2019] [Accepted: 05/13/2019] [Indexed: 12/17/2023]
Abstract
Human epidermal growth factor receptor 2 (HER2/erbB2) is a key driver and therapeutic target for breast cancer. The treatment of HER2-positive breast cancer remains a clinical challenge largely due to the limited understanding of HER2-driving oncogenic signaling and the frequent resistance to simply HER2-targeted therapy. Here, we show that the histone deacetylase inhibitor, trichostatin A (TSA), suppresses HER2-overexpressing breast cancer via upregulation of miR-146a and the resultant repression of its oncogenic targets, interleukin-1 receptor-associated kinase 1 and the chemokine receptor CXCR4. Mechanistically, histone H3K56 acetylation and deacetylation on the MIR146A promoter are catalyzed respectively by the acetyltransferase p300 and histone deacetylase 1 (HDAC1), both of which are recruited to the genomic loci by the transcription factor specificity protein 1 (Sp1). HER2 signaling phosphorylates Sp1 and induces its predominant association with HDAC1, but not p300, leading to histone hypoacetylation and silencing of MIR146A. In addition, the death receptor Fas is similarly downregulated by the aforementioned epigenetic paradigm, indicating its wide involvement in impairing tumor suppressor gene expression. Consequently, TSA synergizes with lapatinib, a tyrosine kinase inhibitor of HER2, to suppress breast cancer in vitro and in rodent models. These findings demonstrate a novel mechanism of HER2-driven carcinogenesis and suggest the applicability of combined HER2 and HDAC targeting in breast cancer therapy.
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MESH Headings
- Animals
- Breast Neoplasms/drug therapy
- Breast Neoplasms/genetics
- Cell Line, Tumor
- Down-Regulation/drug effects
- Down-Regulation/genetics
- Epigenesis, Genetic/genetics
- Female
- Gene Expression Regulation, Neoplastic/drug effects
- Gene Expression Regulation, Neoplastic/genetics
- Histone Deacetylase 1/genetics
- Histone Deacetylase Inhibitors/pharmacology
- Histone Deacetylases/genetics
- Humans
- MCF-7 Cells
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Promoter Regions, Genetic/drug effects
- Promoter Regions, Genetic/genetics
- Receptor, ErbB-2/genetics
- Sp1 Transcription Factor/genetics
- Transcription, Genetic/drug effects
- Transcription, Genetic/genetics
- Transcriptional Activation/drug effects
- Transcriptional Activation/genetics
- Up-Regulation/drug effects
- Up-Regulation/genetics
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Affiliation(s)
- Guoyin Li
- State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, China
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, China
| | - Qiaosheng Xie
- Department of Immunology, Fourth Military Medical University, Xi'an, China
- Department of Radiation Oncology, China-Japan Friendship Hospital, Beijing, China
| | - Zhiwei Yang
- Department of Applied Physics, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Lei Wang
- State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, China
| | - Xiang Zhang
- State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, China
| | - Baile Zuo
- Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Shengli Zhang
- Department of Applied Physics, School of Science, Xi'an Jiaotong University, Xi'an, China
| | - Angang Yang
- Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Lintao Jia
- State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, China
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Sun SP, Lu W, Lei YB, Men XM, Zuo B, Ding SG. [Prediction of round window visibility in cochlear implantation with temporal bone high resolution computed tomography]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:561-565. [PMID: 28822406 DOI: 10.3760/cma.j.issn.1673-0860.2017.08.001] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To discuss the prediction of round window(RW) visibility in cochlear implantation(CI) with temporal bone high resolution computed tomography(HRCT). Methods: From January 2013 to January 2017, 130 cases underwent both HRCT and CI in our hospital were analyzed. The distance from facial nerve to posterior canal wall(FWD), the angle between facial nerve and inner margin of round window(FRA), and the angle between facial nerve and tympanic anulus to inner margin of round window(FRAA) were detected at the level of round window on axial temporal bone HRCT. A line parallel to the posterior wall of ear canal was drawn from the anterior wall of facial nerve at the level of round window on axial temporal bone HRCT and its relationship with round window was detected (facial-round window line, FRL): type0-posterior to the round window, type1-between the round window, type2-anterior to the round window. Their(FWD, FRA, FRAA, FRL) relationships with intra-operative round window visibility were analyzed by SPSS 17.0 software. Results: FWD(F=18.76, P=0.00), FRA(F=34.57, P=0.00), FRAA (F=14.24, P=0.00) could affect the intra-operative RW visibility significantly. RW could be exposed completely during CI when preoperative HRCT showing type0 FRL. RW might be partly exposed and not exposed when preoperative HRCT showing type1 and type2 FRL respectively. Conclusion: FWD, FRA, FRAA and FRL of temporal bone HRCT can predict intra-operative round window visibility effectively in CI surgery.
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Affiliation(s)
- S P Sun
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - W Lu
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Y B Lei
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - X M Men
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - B Zuo
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - S G Ding
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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Sun SP, Lu W, Men XM, Zuo B, Lei YB. [Possible reasons for cerebrospinal fluid gusher in cochlear implantation with inner ear abnormality]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:283-286. [PMID: 28441806 DOI: 10.3760/cma.j.issn.1673-0860.2017.04.009] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To discuss the possible reasons for cerebrospinal fluid (CSF) gusher in cochlear implantation (CI) with inner ear abnormality. Method: A retrospective analysis was performed on 340 cases who underwent CI from January 2013 to December 2016 in Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University. Among them, 96 cases had inner ear abnormalities. Imaging examinations were performed on these patients, and classification of inner ear malformation was done according to the results. Results: Among the cases with inner ear abnormality, 9.4% (9/96) suffered from CSF gusher during CI. The inner ear abnormalities were found to be as follows: 3 cases had incomplete partition type Ⅰ; 1 case had incomplete partition type Ⅰ with semicircular canal dysplasia; 1 case had common cavity deformity; 1 case had enlarged vestibular aqueducts and common cavity deformity; 2 cases had Mondini deformity. All of these cases had bony defect in the fundus of the internal acoustic meatus observed on CT scans. Another case was type 1 cochlear aqueduct with round window aplasia. Conclusions: Defects in the modiolus or fundus of the internal acoustic meatus is the main reason for CSF gusher during CI. A patent cochlear aqueduct is another possible reason.
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Affiliation(s)
- S P Sun
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Henan 450052, China
| | - W Lu
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Henan 450052, China
| | - X M Men
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Henan 450052, China
| | - B Zuo
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Henan 450052, China
| | - Y B Lei
- Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Henan 450052, China
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Zheng G, Li W, Zuo B, Guo Z, Xi W, Wei M, Chen P, Wen W, Yang AG. High expression of CREPT promotes tumor growth and is correlated with poor prognosis in colorectal cancer. Biochem Biophys Res Commun 2016; 480:436-442. [PMID: 27773816 DOI: 10.1016/j.bbrc.2016.10.067] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 10/19/2016] [Indexed: 12/29/2022]
Abstract
CREPT (cell cycle-related and expression elevated protein in tumor) is highly expressed in many kinds of cancer, and has been shown to be prognostic in certain cancers. However, the clinical significance of CREPT in colorectal cancer (CRC) has not been sufficiently investigated. In this study, we examined the CREPT expression in 225 clinical CRC tissues and paired adjacent normal tissues, and analyzed the correlation between CREPT expression and other clinicopathological features. We also evaluated the biological function of CREPT both in vitro and in vivo using knockdown or overexpressing CRC cells. Our results showed that CREPT expressed in 175 of 225 (77.8%) CRC patients and the CREPT expression was significantly associated with tumor differentiation (P = 0.000), Dukes' stages (P = 0.013) and metastasis (P = 0.038). Patients with high CREPT expression tended to have shorter survival time. Multivariate analysis showed that positive CREPT expression can be used as an independent predictor for CRC prognosis. CREPT knockdown cells showed inhibited cell proliferation and arrested cell cycle, while CREPT overexpressing cells showed increased proliferation and promoted cell cycle. In addition, CREPT overexpression significantly promoted tumor growth in vivo. Mechanism study showed that CREPT may regulate cell proliferation and cell cycle through the regulation on cyclin D3, CDK4 and CDK6.
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Affiliation(s)
- Guoxu Zheng
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, 710032, China
| | - Weimiao Li
- Department of Respiration, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Baile Zuo
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, 710032, China
| | - Zhangyan Guo
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, 710032, China
| | - Wenjin Xi
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, 710032, China
| | - Ming Wei
- Department of Urology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Peng Chen
- Department of Thoracic Surgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Weihong Wen
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, 710032, China.
| | - An-Gang Yang
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, 710032, China.
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Xu D, Cheng J, Zuo B. [Choroidal IgG4-related disease: report of a case]. Zhonghua Bing Li Xue Za Zhi 2016; 45:350-352. [PMID: 27142925 DOI: 10.3760/cma.j.issn.0529-5807.2016.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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11
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Lan L, Zuo B, Ding H, Huang Y, Chen X, Du A. Anticoccidial evaluation of a traditional chinese medicine—Brucea javanica—in broilers. Poult Sci 2016; 95:811-8. [DOI: 10.3382/ps/pev441] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 11/08/2015] [Indexed: 01/04/2023] Open
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12
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Lu M, Kong Q, Xu X, Lu H, Lu Z, Yu W, Zuo B, Su J, Guo R. Evaluation of Apoptotic and Growth Inhibitory Activity of Phloretin in BGC823 Gastric Cancer Cell. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i1.5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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13
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Ren ZQ, Wu WJ, Liu WH, Zheng R, Li JL, Zuo B, Xu DQ, Li FE, Lei MG, Ni DB, Xiong YZ. Differential expression and effect of the porcine ANGPTL4 gene on intramuscular fat. Genet Mol Res 2014; 13:2949-58. [PMID: 24782129 DOI: 10.4238/2014.april.16.3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In a previous study, we investigated differences in gene expression in backfat between Meishan and Large White pigs and their F1 hybrids, Large White x Meishan, and Meishan x Large White pigs. One potential differentially expressed sequence tag from the mRNA differential display was a homolog of the human angiopoietin-like 4 (ANGPTL4) gene, which encodes a protein that is secreted by both liver and white adipose tissues and can inhibit lipoprotein lipase activity and stimulate white adipose tissue lipolysis. Here, ANGPTL4 mRNA was found to be upregulated in the backfat of Large White compared with that in the Meishan pigs and the F1 hybrids, Meishan x Large White and Large White x Meishan, whereas expression was lowest both in the longissimus dorsi and the heart, as shown by the tissue distribution profile. Only one mutation, a G/A transition located in the third intron, was found. The ANGPTL4 G/A polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) showed a significant effect on intramuscular fat (IMF), water moisture of the longissimus dorsi, meat marbling of the longissimus dorsi, and pH of the longissimus dorsi (P < 0.05). This site seemed to be significantly (P < 0.05) additive in its actions on IMF, water moisture, and pH, whereas it showed significant dominance in its action on meat marbling (P < 0.05). This locus can be potentially considered as a marker for IMF improvement.
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Affiliation(s)
- Z Q Ren
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - W J Wu
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - W H Liu
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - R Zheng
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - J L Li
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - B Zuo
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - D Q Xu
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - F E Li
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - M G Lei
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - D B Ni
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
| | - Y Z Xiong
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agriculture Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science, Huazhong Agricultural University, Wuhan, China
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Wang J, Feng YP, Zuo B, Xiong YZ, Deng CY. Transcriptional analysis of the porcine TTID gene and association of different TTID genotypes with carcass traits. Genet Mol Res 2014; 13:1195-202. [PMID: 24634176 DOI: 10.4238/2014.february.27.4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The titin immunoglobulin domain (TTID) protein localizes to the Z line in muscle and binds to alpha-actinin and gamma-filamin. It plays an indispensable role in stabilizing and anchoring of thin filaments. In this study, the 5'-regulatory region of the porcine TTID gene was analyzed with bioinformatic methods. Another objective of this study was to further investigate the polymorphism in the intron 6 of the porcine TTID gene. We determined allele frequency among six Chinese porcine purebreds. The polymorphisms were genotyped in a population of 280 F2 pigs representing two Large White x Meishan reference families. Different TTID genotypes were significantly associated with carcass traits, including skin percentage (P < 0.05), loin eye area (P < 0.05), and average skin thickness (P < 0.01). Our study will continue to lay the groundwork for further investigations into the detailed function of the porcine TTID gene.
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Affiliation(s)
- J Wang
- Department of Bio-Engineering, Faculty of Environmental Engineering, Wuhan Textile University, Wuhan, Hubei Province, China
| | - Y-P Feng
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics and Breeding, Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei Province, China
| | - B Zuo
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics and Breeding, Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei Province, China
| | - Y-Z Xiong
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics and Breeding, Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei Province, China
| | - C-Y Deng
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics and Breeding, Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei Province, China
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Lu M, Kong Q, Xu X, Lu H, Lu Z, Yu W, Zuo B, Su J, Guo R. Pectolinarigenin - A Flavonoid Compound from Cirsium Japonicum with Potential Anti-proliferation Activity in MCF- 7 Breast Cancer Cell. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i2.9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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16
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Abstract
Many QTLs for fatness traits have been mapped on pig chromosome 7q1.1-1.4 in various pig resource populations. Eight novel markers, including seven SNPs and one insertion or deletion within BTNL1, COL21A1, PPARD, GLP1R, MDFI, GNMT, ABCC10, and PLA2G7 genes, as well as two previously reported SNPs in SLC39A7 and HMGA1 genes, were genotyped in Large White and Meishan pig breeds. Except for two SNPs in HMGA1 and ABCC10 genes, allele frequencies of the other eight markers are highly significant different between Chinese indigenous Meishan breeds and Large White pig breeds. Eight polymorphic sites were then used for linkage and QTL mapping to refine the fatness QTL in a Large White × Meishan F(2) resource population. Five chromosome-wise significant QTLs were detected, of which the QTLs for leaf fat weight, backfat thickness at 6-7th rib and rump, and mean backfat thickness were narrowed to the interval between PPARD and GLP1R genes and the QTL for backfat thickness at thorax-waist between GNMT and PLA2G7 genes on SSC7p1.1-q1.4.
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Affiliation(s)
- W H Huang
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, PR China
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17
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Mo XY, Lan J, Jiao QZ, Xiong YZ, Zuo B, Li FE, Xu DQ, Lei MG. Molecular characterization, expression pattern and association analysis of the porcine BTG2 gene. Mol Biol Rep 2010; 38:4389-96. [PMID: 21116848 DOI: 10.1007/s11033-010-0566-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2009] [Accepted: 11/17/2010] [Indexed: 10/18/2022]
Abstract
B-cell translocation gene 2 (BTG2), a member of the B-cell translocation gene family with anti-proliferative properties, have been characterized to be involved in cell growth, differentiation and survival. In this study, we cloned the full length sequences of cDNA and genomic DNA of BTG2 gene from the porcine skeletal muscle. Spatial expression analysis showed that the porcine BTG2 gene is expressed predominantly in muscle. Temporal expression analysis in longissimus dorsi muscle demonstrated that the expression of BTG2 gene has the highest expression at 60 days old in Large White while with a peak expression at 120 days old in Meishan. Temporal analysis also revealed that the expression of BTG2 gene is generally higher in Large White than in Meishan at all the developmental stages tested (65 days of conception and 3, 35, 60, 120, and 180 days of postnatal). A single nucleotide polymorphism (G417C) in the intron of BTG2 gene was then detected by PCR-RFLP in Large White × Meishan F2 resource population and association analysis suggested that this polymorphic site had significant association (P < 0.05) with the buttock fat thickness, fat percentage, lean muscle percentage, ratio of lean to fat and carcass length.
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Affiliation(s)
- X Y Mo
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Sciences, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
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18
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Yang H, Xu ZY, Lei MG, Li FE, Deng CY, Xiong YZ, Zuo B. Real-time reverse transcription-PCR expression profiling of porcine troponin I family in three different types of muscles during development. Mol Biol Rep 2010; 38:827-32. [PMID: 20376701 DOI: 10.1007/s11033-010-0172-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Accepted: 03/31/2010] [Indexed: 11/27/2022]
Abstract
In this study, the expression profiling of three troponin I isoforms (TNNI1, TNNI2 and TNNI3) was investigated in two pig breeds differing in muscularity (Yorkshire and Meishan) at six stages (fetal 60 days and postnatal 3, 35, 60, 120, and 180 days) and three types of muscles (longissimus dorsi muscle, LD; semitendinosus, ST; cardiac muscle, CM) using relative real-time quantitative PCR. Significant differences of troponin I expression in three muscles were found between Yorkshire and Meishan breeds at some stages. The expression peak of TNNI1 and TNNI2 in LD and ST was at postnatal 35 or 60 days in Yorkshire and at postnatal 120 or 180 days in Meishan pigs, while it occurred in CM at postnatal 3 days in two pig breeds. The relative expression values of TNNI1 and TNNI2 were significantly higher in LD than ST at most of stages after birth. The expression ratio of TNNI2 versus TNNI1 favoured TNNI2 expression in ST and LD, but on the contrary in CM. The expression peak of TNNI3 occurred at postnatal 60 and 120 days in Yorkshire and Meishan pigs, respectively. TNNI1 and TNNI3 were co-expressed in CM during the fetal and earlier stages after birth.
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Affiliation(s)
- H Yang
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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Yang H, Xu ZY, Lei MG, Li FE, Deng CY, Xiong YZ, Zuo B. Association of 3 polymorphisms in porcine troponin I genes (TNNI1 andTNNI2) with meat quality traits. J Appl Genet 2010; 51:51-7. [DOI: 10.1007/bf03195710] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Xu ZY, Yang H, Xiong YZ, Deng CY, Li FE, Lei MG, Zuo B. Identification of three novel SNPs and association with carcass traits in porcine TNNI1 and TNNI2. Mol Biol Rep 2010; 37:3609-13. [PMID: 20182806 DOI: 10.1007/s11033-010-0010-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2009] [Accepted: 02/16/2010] [Indexed: 10/19/2022]
Abstract
In this study, two novel SNPs (EU743939:g.5174T>C in intron 4 and EU743939:g.8350C>A in intron 7) in TNNI1 and one SNP (EU696779:g.1167C>T in intron 3) in TNNI2 were identified by PCR-RFLP (PCR restriction fragment length polymorphism) using XbaI, MspI and SmaI restriction enzyme, respectively. The allele frequencies of three novel SNPs were determined in the genetically diverse pig breeds including ten Chinese indigenous pigs and three Western commercial pig breeds. Association analysis of the SNPs with the carcass traits were conducted in a Large White × Meishan F(2) pig population. The linkage of two SNPs (g.5174T>C and g.8350C>A) in TNNI1 gene had significant effect on fat percentage. Besides these, the g.5174T>C polymorphism was also significantly associated with skin percentage (P < 0.05), shoulder fat thickness (P < 0.05) and backfat thickness between sixth and seventh ribs (P < 0.05). The significant effects of g.1167C>T polymorphism in TNNI2 gene on fat percentage (P < 0.01), lean meat percentage (P < 0.05), lion eye area (P < 0.05), thorax-waist backfat thickness (P < 0.01) and average backfat thickness (P < 0.05) were also found.
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Affiliation(s)
- Z Y Xu
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China
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Xu YJ, Jin ML, Wang LJ, Zhang AD, Zuo B, Xu DQ, Ren ZQ, Lei MG, Mo XY, Li FE, Zheng R, Deng CY, Xiong YZ. Differential proteome analysis of porcine skeletal muscles between Meishan and Large White1. J Anim Sci 2009; 87:2519-27. [DOI: 10.2527/jas.2008-1708] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
In this study, the molecular characterization and potential association of SLC39A7 gene with carcass traits were investigated in pigs. The sequence of SLC39A7 cDNA was obtained by in silico cloning and RT-polymerase chain reaction (PCR). Two transcripts, variant 1 (2398 bp) and variant 2 (2088 bp), of the SLC39A7 gene were identified. Expression analysis of SLC39A7 in 10 different tissues by RT-PCR showed that variant 1 was ubiquitously expressed in all tissues analysed, but variant 2 was not found in fat tissue. The cDNA regions of variant 1 and 2 were organized in seven and eight exons respectively. A c.205G>A substitution in exon 3, which changes a codon for glycine into a codon for arginine, (p.Gly69Arg) and a c.1138-216T>C substitution in intron 6 were detected by PCR-HpaII-restriction fragment length polymorphisms (RFLP) and PCR-cofI-RFLP respectively. Significant differences were found in the allele frequencies of c.205G>A among six Chinese indigenous pig breeds and two commercial pig breeds. Linkage analysis showed that the c.205G>A polymorphism within the SLC39A7 gene was closely linked to the marker Sw1856 on pig chromosome 7 in a Large White x Meishan F(2) resource population. The QTL and association studies between polymorphisms of the SLC39A7 gene and carcass traits were carried out. Significant associations of the SLC39A7 polymorphisms with backfat thickness at thorax-waist (p < 0.05), average backfat thickness (p < 0.05) and leaf fat weight (p < 0.01) were found. Additional F-drop test or marker assisted association analyses also supported the association of the mutation in SLC39A7 with the above traits. Together, the present study provided the useful information for the characterization of SLC39A7 gene and potential association with carcass traits in pigs.
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Affiliation(s)
- Z G Chen
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
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Wang Y, Xiong YZ, Ren ZQ, Zuo B, Lei MG, Deng CY. Isolation, Expression Pattern, Polymorphism and Association Analysis of Porcine TIAF1 Gene. Asian Australas J Anim Sci 2009. [DOI: 10.5713/ajas.2009.80400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Liu LQ, Li FE, Deng CY, Zuo B, Zheng R, Xiong YZ. Polymorphism of the pig 17beta-hydroxysteroid dehydrogenase type1 (HSD17B1) gene and its association with reproductive traits. Anim Reprod Sci 2008; 114:318-23. [PMID: 18945563 DOI: 10.1016/j.anireprosci.2008.09.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 08/31/2008] [Accepted: 09/05/2008] [Indexed: 11/16/2022]
Abstract
17beta-Hydroxysteroid dehydrogenase type 1 (HSD17B1) is a key enzyme of 17beta-estradiol biosynthesis, which might play an important role in follicular development of the ovary. In this study, we isolated the complete coding sequence of porcine HSD17B1 gene and its unique intron sequences of porcine HSD17B1 gene, identified a single nucleotide polymorphism (SNP: A/C) in intron 4, and developed a PCR-MvaI-RFLP genotyping assay. Association of the SNP and litter size was assessed in two populations (purebred Large White and a experimental synthetic Line (DIV) sows). Statistical analysis demonstrated that, in the first parity, AC animals in experimental synthetic Line (DIV) sows had 0.52 more piglets born compared to the CC animals (P<0.05). In the all parities, pigs with the AA genotype had an additional 1.11 and 0.96 piglets born alive compared to the CC animals (P<0.05) in both experimental synthetic Line (DIV) and purebred Large White, respectively. Experimental synthetic Line (DIV) sows inheriting the AC genotype had additional 0.84 piglets born alive compared to the CC animals (P<0.01) in all parities. In addition, significant additive effect of -0.55+/-0.24 piglets/litter and -0.48+/-0.22 piglets/litter on piglet born alive was detected in both experimental synthetic Line (DIV) sows and purebred Large White lines (P<0.05), respectively. Therefore, HSD17B1 gene was significantly associated with litter size in two populations and could be a useful molecular marker in selection for increasing litter size in pigs.
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Affiliation(s)
- L Q Liu
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, PR China.
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Xu ZY, Xiong YZ, Lei MG, Li FE, Zuo B. Genetic polymorphisms and preliminary association analysis with production traits of the porcine SLC27A4 gene. Mol Biol Rep 2008; 36:1427-32. [PMID: 18696256 DOI: 10.1007/s11033-008-9332-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Accepted: 07/30/2008] [Indexed: 10/21/2022]
Abstract
Solute carrier family 27 (fatty acid transporter), member 4 (SLC27A4) is a fatty acyl-CoA synthetase producing very long chain fatty acid-CoA for lipid metabolic pathways, suggesting that the SLC27A4 gene is a potential candidate gene for traits related to fat deposition in animals. This study was conducted to sequence the genomic region from exon 6 to 12 of porcine SLC27A4 and detect polymorphisms by comparative sequencing. In silico mapping assigned SLC27A4 gene between gene COQ4 (coenzyme Q4 homolog) and URM1 (ubiquitin related modifier 1 homolog) on pig chromosome 1q24-q2.12 where significant QTL affecting backfat depth had previously been identified. Thirty six putative sites of variation were detected, of which 31 polymorphisms including 28 SNPs and 3 indels were located in the intronic region, and 5 in the exonic regions. The g.1777G>A (EU703769) in intron 8 was confirmed by PCR-RFLP using HpaII restriction enzyme and further genotyped in four Chinese native pig breeds (Meishan, Erhualian, Tongcheng and Qingping) and three western meat-type pig breeds (Duroc, Large White and Landrace). Allele G was exclusively present in Tongcheng and Qingping pigs and predominant in the other pig populations analyzed. Significant differences of backfat at rump, body weight at birth and average daily gain on weaning between the AG and GG genotype were observed in Landrace pig population (P < 0.05).
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Affiliation(s)
- Z Y Xu
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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Zhang YH, Mei SQ, Peng XW, Niu BY, Ren ZQ, Zuo B, Xu DQ, Lei MG, Zheng R, Jiang SW, Deng CY, Xiong YZ, Li FE. Molecular characterization and SNPs analysis of the porcine Deleted in AZoospermia Like (pDAZL) gene. Anim Reprod Sci 2008; 112:415-22. [PMID: 18620821 DOI: 10.1016/j.anireprosci.2008.05.069] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Revised: 05/05/2008] [Accepted: 05/21/2008] [Indexed: 10/22/2022]
Abstract
The Deleted in AZoospermia Like (DAZL) gene is expressed in prenatal and postnatal germ cells. In this study, we cloned and characterized the porcine Deleted in AZoospermia Like (pDAZL) gene. We found the full-length coding sequence of the pDAZL encoded a protein of 295 amino acids with a RNA recognition motif (amino acids 41-111) and a DAZ repeat (amino acids 167-120). The deduced protein sequence of pDAZL is 92.5% and 91.5% similar to those of human and bovine, respectively. PCR-MspI-RFLP and PCR-TaqI-RFLP were established to detect an A/G mutation in intron 7 and a C/A mutation in intron 9, respectively. Associations of two SNPs with litter size traits were assessed in Large White (n=275) and DIV (n=128) pig populations, and the statistical analysis demonstrated that CC produced 0.716 more (P<0.05) piglets born alive than CD genotypes in Large White pigs at TaqI locus (C/A mutation in intron 9), and the dominance effect was 0.304 pig per litter (P<0.05). This result suggests that the pDAZL gene might be a good candidate gene of litter size trait and provides some marker information for marker-assisted selection (MAS).
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Affiliation(s)
- Y H Zhang
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
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Chen JF, Dai LH, Peng J, Li JL, Zheng R, Zuo B, Li FE, Liu M, Yue K, Lei MG, Xiong YZ, Deng CY, Jiang SW. New Evidence of Alleles (V199I and G52S) at the PRKAG3 (RN) Locus Affecting Pork Meat Quality. Asian Australas J Anim Sci 2008. [DOI: 10.5713/ajas.2008.70373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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29
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Zuo B, Yang H, Wang J, Lei M, Xiong Y. Molecular characterization, sequence variation and
association with fat deposition traits of ACOX1
gene in pigs. J Anim Feed Sci 2007. [DOI: 10.22358/jafs/66799/2007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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30
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Liu M, Peng J, Xu DQ, Zheng R, Li FE, Li JL, Zuo B, Lei MG, Xiong YZ, Deng CY, Jiang SW. Association analyses of polymorphisms in porcine MYF5 and MYOD1 genes with carcass traits. ACTA ACUST UNITED AC 2007. [DOI: 10.1071/ar06420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective of this study was to assess the effect of polymorphisms of myogenic factor 5 (MYF5) and myogenic differentiation 1 (MYOD1) genes on carcass traits in pigs. PCR-RFLP was used to identify three and one SNP(s) from the MYF5 and the MYOD1 gene, respectively. Association analysis performed on the four polymorphisms in a series of three Large White × Meishan F2 populations totalling near 400 pigs showed: (1) an MYF5 exon 1 Hsp92II polymorphism causing a Met→Leu substitution was significantly associated with fat meat percentage, shoulder fat thickness, thorax-waist fat thickness, average backfat thickness and carcass length to 1st rib (P < 0.05); (2) an MYF5 exon 2 MspI polymorphism and an intron 1 HaeIII polymorphism, which were completely linked, were significantly associated with thorax-waist fat thickness, 6–7th rib fat thickness and carcass length to 1st rib (P < 0.05); (3) an MYOD1 intron 1 DdeI polymorphism was significantly associated with carcass length to 1st rib.
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Zuo B, Xiong YZ, Su YH, Deng CY, Lei MG, Li FE, Zheng R, Jiang SW. QTL analysis of production traits on SSC3 in a Large White×Meishan pig resource family. S AFR J ANIM SCI 2006. [DOI: 10.4314/sajas.v36i2.3994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Dai LH, Xiong YZ, Deng CY, Jiang SW, Zuo B, Zheng R, Li FE, Lei MG. Association of the A-G Polymorphism in Porcine Adiponectin Gene with Fat Deposition and Carcass Traits. Asian Australas J Anim Sci 2006. [DOI: 10.5713/ajas.2006.779] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Niu BY, Xiong YZ, Jiang SW, Li FE, Deng CY, Ding SH, Guo WH, Lei MG, Zheng R, Zuo B, Xu DQ, Li JL. Oviduct-specific Glycoprotein 1 Locus is Associated with Litter Size and Weight of Ovaries in Pigs. Asian Australas J Anim Sci 2006. [DOI: 10.5713/ajas.2006.632] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wu J, Deng C, Xiong Y, Zhou D, Lei M, Zuo B, Li F, Wang J. cDNA Cloning and Polymorphism of the Porcine Carbonic Anhydrase III (CA3) Gene. Asian Australas J Anim Sci 2006. [DOI: 10.5713/ajas.2006.324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Chen JF, Xiong YZ, Zuo B, Zheng R, Li FE, Lei MG, Li JL, Deng CY, Jiang SW. New Evidences of Effect of Melanocortin-4 Receptor and Insulin-like Growth Factor 2 Genes on Fat Deposition and Carcass Traits in Different Pig Populations. Asian Australas J Anim Sci 2005. [DOI: 10.5713/ajas.2005.1542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ren ZHQ, Xiong YZH, Deng CHY, Zuo B, Liu YG, Lei MG. Age-dependent Changes of Differential Gene Expression Profile in Backfat Tissue between Hybrids and Parents in Pigs. Asian Australas J Anim Sci 2005. [DOI: 10.5713/ajas.2005.682] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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37
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Zuo B, Xiong YZ, Deng CY, Su YH, Wang J, Lei MG, Li FE, Jiang SW, Zheng R. Polymorphism, linkage mapping and expression pattern of the porcine skeletal muscle glycogen synthase (GYS1) gene. Anim Genet 2005; 36:254-7. [PMID: 15932409 DOI: 10.1111/j.1365-2052.2005.01286.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The glycogen synthase gene (GYS1), which encodes the rate-limiting enzyme for glycogen synthesis of skeletal muscle, is a promising candidate gene for traits related to skeletal muscle in pigs. In this study, a G/A single nucleotide polymorphism in GYS1 intron 7 detected as a FokI PCR-restriction fragment length polymorphism (PCR-RFLP) showed allele frequency differences among five Chinese indigenous pig breeds and three western commercial pig breeds. Linkage analysis assigned the gene GYS1 to marker interval SW1302-SW1473 on SSC6 in a three-generation Meishan X Large White reference family. The results of association analysis and interval mapping suggested that the FokI PCR-RFLP polymorphism might be linked with the quantitative trait loci affecting carcass traits detected on SSC6 in the F2 intercross pedigree. The reverse transcriptase-polymerase chain reaction revealed that the porcine GYS1 gene was expressed in spleen, lung, liver, kidney, small intestine, skeletal muscle, heart and stomach, with the highest expression in skeletal muscle.
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Affiliation(s)
- B Zuo
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agriculture University, Wuhan 430070, China
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Zhang BZ, Lei MG, Deng CY, Xiong YH, Zuo B, Li FE. Association between PCR-RFLP Polymorphism of the Fifth Intron in Lipoprotein Lipase Gene and Productive Traits in Pig Resource Family. Asian Australas J Anim Sci 2005. [DOI: 10.5713/ajas.2005.458] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Affiliation(s)
- M G Lei
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Sciences, Huazhong Agricultural University, Wuhan 430070, China
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Abstract
LIM domain proteins are important regulators of the growth, determination and differentiation of cells. Four-and-a-half LIM-only protein 3 (FHL3) is a type of LIM-only protein that contains four tandemly repeated LIM motifs with an N-terminal single zinc finger (half LIM motif). In this study, we have determined the complete coding sequence of pig FHL3 which encodes a 280 amino acid protein. The coding region of the pig FHL3 gene is organized in five exons and spans an approximately 2.1-kb genomic region. Comparative sequencing of six pig breeds revealed three single nucleotide polymorphisms (SNPs) within exon 2 of which an A-->G substitution at position 313 changes a codon for arginine into a codon for glycine. The substitution was situated within a PstI recognition site and developed as a PCR-RFLP marker for further use in population variation investigations and association analysis. The A/G polymorphism was segregating only in Landrace pigs. Association studies of the FHL3 polymorphism with carcass traits provided preliminary evidence that the PstI PCR-restriction fragment length polymorphism (RFLP) genotype may be associated with variation in several carcass traits of interest for pig breeding. Further investigations in more Landrace pigs are needed to confirm this.
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Affiliation(s)
- B Zuo
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agriculture University, Wuhan, 430070, China
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Liu GY, Xiong YZ, Deng CY, Zuo B, Zhang JH. Comparison of Gene Expression Patterns in Longissimus dorsi of Pigs between the High-parent Heterosis Cross Combination Landrace×Large White and the Mid-parent Heterosis Cross Combination Large White×Meishan. Asian Australas J Anim Sci 2004. [DOI: 10.5713/ajas.2004.1192] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zuo B, Xiong YZ, Su YH, Deng CY, Lei MG, Zheng R, Jiang SW, Li FE. Mapping of Quantitative Trait Loci on Porcine Chromosome 7 Using Combined Data Analysis. Asian Australas J Anim Sci 2004. [DOI: 10.5713/ajas.2004.1350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jiang XP, Liu GQ, Xiong YZ, Ding JT, Xie KZ, Zhang JQ, Zuo B. Phenotypic and Genetic Parameters for Inosine Acid in Relation to Carcass and Meat Quality Traits in Pigs. Asian Australas J Anim Sci 2003. [DOI: 10.5713/ajas.2003.257] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Liu B, Chen C, Zuo B. [Floatation spectrophotometric determination of metals with isochromatic dye ion-pairs tetrabromofluorescein-rhodamine 6G system]. Guang Pu Xue Yu Guang Pu Fen Xi 1999; 19:487-489. [PMID: 15819101] [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: 05/24/2023]
Abstract
The floatation spectrophotometric determination of germanium, platinum and ferrum with isochromatic dye ion-pairs formed by tetrabromofluorescein (TBF) and rhodamine 6G (R6G) is described. The association complexes of these metallic ions with rhodamine 6G floated with organic solvent were first allowed to react on basicity, and then on tetrabromofluorescein which is of the same color as rhodamine 6G. The isochromatic dye ion-pairs of R6G x TBF were floated with toluene. The floatation R6G x TBF in acetone was dissolved and the absorbance of the solution at 530 nm was measured. The sensitivity is raised because of the 2 m dyes. The molar absorptivities for Ge, Pt and Fe are greater than 10(5) L mol(-1) cm(-1).
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Affiliation(s)
- B Liu
- Research Centre of Physical and Chemical Analysis, Hebei University, 071002 Baoding
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Zhao X, Ding L, Liu B, Zuo B. [Absorption characteristics of the isochromatic dye ion-pair formed by tetrabromofluorescein and buthylrhodamine B]. Guang Pu Xue Yu Guang Pu Fen Xi 1999; 19:233-235. [PMID: 15819019] [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: 05/24/2023]
Abstract
Absorption properties of tetrabromofluorescein (TBF) and buthylrhodamine B (BRB) and the isochromatic dye ion-pair formed by TBF and BRB were studied. The experiment showed that the proportion of TBF: BRB was 1:2 at pH=7 with Ksp = 2.16 x 10(-18), and the extraction rate was 84.2%. This provides a basis for the application of TBF and BRB to extraction spectrophotometry.
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Affiliation(s)
- X Zhao
- Hebei Medical College for Continuing Education, 071000 Baoding
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Liu B, Chen C, Zuo B. [Flotation spectrophotometric determination of copper on isochromatic dye ion pair with crystal violet and bromopnenol blue]. Guang Pu Xue Yu Guang Pu Fen Xi 1999; 19:102-103. [PMID: 15818932] [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: 05/24/2023]
Abstract
Bromophenol blue (BPB) was produced and entered into the aqueous phase when NaOH solution of pH = 10 was added to Cu(biq)2BPB by trichloromethane and isoamyl alcohol (20:1) extractive. And then CV x BPB was floated by crystal violet (CV) with benzene solution. The flotation was dissolved in ethanol and the absorbance of the solution measured at 590 nm. The sensitivity was raised because of the two dyes assistant effect. The molar absorptivity was 1.45 x 10(5) L x mol(-1) x cm(-1). Copper in the sample was separated first by extracting the Cu(biq)2BPB complex with trichloromethane and isoamyl alcohol, thus achieving a high selectivity. Beer's law was obeyd in the range of 0-0. 4 mg/L with a relative standard deviation of 3.6%. For 4.8 x 10(-8) g/mL copper solution, the recoveries were 97.8%-101.7%.
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Affiliation(s)
- B Liu
- Research Centre of Physical and Chemical Analysis, Hebei University, 071002 Baoding
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Liu B, Chen C, Zuo B. [Flotation spectrophotometric determination of platinum on isochromatic dye ion pair with tetrabromofluorescein and rhodamine 6G]. Guang Pu Xue Yu Guang Pu Fen Xi 1998; 18:492-495. [PMID: 15825351] [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: 05/24/2023]
Abstract
The flotation spectrophotometric method for the determination of platinum with isochromatic dye ion-pair is described. Rhodamine 6G (R6G) was produced and entered into aqueous phase when pH = 5.5 buffer solution was added to the Pt (SnCl3)5 (R6G)3 by isopropyl ether flotation. And then R6G. TBF was floated by tetrabromofluorescein(TBF)with toluene. The floatation was dissolved in acetone and absorbance of the solution was measured at 530nm. The sensitivity was raised because of the six dyes (Pt : R6G : TBF = 1 : 3 : 3) assistant effect. The molar absorptivity of this method is 5.92 x 10(5)L x mol(-1) x cm(-1). Beer's law was obeyed in the range of 0-2 microg/10mL with a relative standard deviation of 3.8%. The method was applied satisfactorily to the determination of platinum contained in catalysts without separation.
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Affiliation(s)
- B Liu
- Research Centre of Physical and Chemical Analysis, Hebei University, 071002 Baoding
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