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Sun N, Liu Y, Xu T, Zhou X, Xu H, Zhang H, Zhan R, Wang L. Genome-wide analysis of sugar transporter genes in maize ( Zea mays L.): identification, characterization and their expression profiles during kernel development. PeerJ 2023; 11:e16423. [PMID: 38025667 PMCID: PMC10658905 DOI: 10.7717/peerj.16423] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/18/2023] [Indexed: 12/01/2023] Open
Abstract
Sugar transporters (STs) play a crucial role in the development of maize kernels. However, very limited information about STs in maize is known. In this study, sixty-eight ZmST genes were identified from the maize genome and classified into eight major groups based on phylogenetic relationship. Gene structure analysis revealed that members within the same group shared similar exon numbers. Synteny analysis indicated that ZmSTs underwent 15 segmental duplication events under purifying selection. Three-dimensional structure of ZmSTs demonstrated the formation of a compact helix bundle composed of 8-13 trans-membrane domains. Various development-related cis-acting elements, enriched in promoter regions, were correlated with the transcriptional response of ZmSTs during kernel development. Transcriptional expression profiles exhibited expression diversity of various ZmST genes in roots, stems, leaves, tassels, cobs, embryos, endosperms and seeds tissues. During kernel development, the expression of 24 ZmST genes was significantly upregulated in the early stage of grain filling. This upregulation coincided with the sharply increased grain-filling rate observed in the early stage. Overall, our findings shed light on the characteristics of ZmST genes in maize and provide a foundation for further functional studies.
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Affiliation(s)
- Nan Sun
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China
- Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd., Zhaoyuan, Shandong, China
| | - Yanfeng Liu
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China
- Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd., Zhaoyuan, Shandong, China
| | - Tao Xu
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China
- College of Agriculture, Ludong University, Yantai, Shandong, China
| | - Xiaoyan Zhou
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China
- College of Agriculture, Ludong University, Yantai, Shandong, China
| | - Heyang Xu
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China
- College of Agriculture, Ludong University, Yantai, Shandong, China
| | - Hongxia Zhang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China
- Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd., Zhaoyuan, Shandong, China
| | - Renhui Zhan
- School of Pharmacy, Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Binzhou Medical University, Yantai, Shandong, China
| | - Limin Wang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai, Shandong, China
- Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd., Zhaoyuan, Shandong, China
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Fang F, Zhou W, Liu Y, Song Z, Zheng S, Wang F, Lu Z, Qi D, Li B, Sun N, Tang X, Zhang J, Zhan R, Wang L, Zhang H. Characterization of RING-type ubiquitin SINA E3 ligases and their responsive expression to salt and osmotic stresses in Brassica napus. Plant Cell Rep 2023; 42:859-877. [PMID: 36788135 DOI: 10.1007/s00299-023-02996-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/02/2023] [Indexed: 05/06/2023]
Abstract
SINA (Seven in absentia) proteins in the subtype of E3 ubiquitin ligase family play a crucial role in plant growth and development. However, their functions in response to salt and osmotic stresses in oil crops are still largely unknown. In this study, a total number of 23 BnaSINAs were identified in the rapeseed genome. Chromosome location and collinear relationship analyses revealed that they were unevenly distributed on 13 chromosomes, and have gone through 22 segmental duplication events under purifying selection. Phylogenetic and gene structural analyses indicated that they belonged to five main groups, and those in the same subgroup showed similar gene structure. All BnaSINAs were predicted to form homo- or heterodimers. Except BnaSINA7, BnaSINA11, BnaSINA17 and BnaSINA18, which lacked the N-terminal RING finger, all BnaSINAs contained a conserved C-terminal SINA domain, a typical structural feature of the RING-type E3 ligase family. Transcriptional expression analyses demonstrated that most BnaSINAs were ubiquitously expressed in roots, stems, leaves, flowers, pods and seeds, and all were responsive to salt and osmotic stresses. Further, yeast two-hybrid and Arabidopsis mutant complementation analyses demonstrated that BnaSINA4 interacted with BnaSINA17 to form heterodimer, and expression of BnaSINA17 in the Arabidopsis sina2 mutant restored its growth resistance to salt and osmotic stresses. Our findings provide an important genetic foundation for the functional elucidation of BnaSINAs and a novel gene resource for the breeding of new oil crop cultivars with improved abiotic stress resistance.
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Affiliation(s)
- Fengyan Fang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- College of Agriculture, Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Wenlong Zhou
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- College of Agriculture, Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Yanfeng Liu
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Zhizhong Song
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Songfeng Zheng
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- College of Agriculture, Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Fei Wang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- College of Agriculture, Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Zeyu Lu
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- College of Agriculture, Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Dazhuang Qi
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- College of Agriculture, Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Bei Li
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Nan Sun
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Xiaoli Tang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd, North of Beiyuanzhuang Village, Fushan County, Zhaoyuan, 265400, Shandong, China
| | - Juan Zhang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China
- College of Agriculture, Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China
| | - Renhui Zhan
- Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai, 264003, Shandong, People's Republic of China
| | - Limin Wang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China.
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, 4 Xueyuan Road, Haikou, 571101, China.
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China.
- Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd, North of Beiyuanzhuang Village, Fushan County, Zhaoyuan, 265400, Shandong, China.
| | - Hongxia Zhang
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, 186 Hongqizhong Road, Yantai, 264025, China.
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, 4 Xueyuan Road, Haikou, 571101, China.
- The Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong (Ludong University), Ludong University, 186 Hongqizhong Road, Yantai, 264025, Shandong, China.
- Zhaoyuan Shenghui Agricultural Technology Development Co., Ltd, North of Beiyuanzhuang Village, Fushan County, Zhaoyuan, 265400, Shandong, China.
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Wu X, Zhan R, Cheng D, Chen L, Wang T, Tang X. [Exosomal FZD10 derived from non-small cell lung cancer cells promotes angiogenesis of human umbilical venous endothelial cells in vitro]. Nan Fang Yi Ke Da Xue Xue Bao 2022; 42:1351-1358. [PMID: 36210708 DOI: 10.12122/j.issn.1673-4254.2022.09.11] [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: 11/24/2022]
Abstract
OBJECTIVE To investigate the effect of exosomal FZD10 derived from non-small cell lung cancer (NSCLC) cells on angiogenesis of human umbilical venous endothelial cells (HUVECs) and explore the possible mechanism. METHODS We analyzed the expression of FZD10 in two NSCLC cell lines (95D and H1299 cells), normal human bronchial epithelial cells (BEAS-2B cells) and their exosomes isolated by ultracentrifugation. Cultured HUVECs were treated with the exosomes derived from NSCLC cells or NSCLC cells transfected with FZD10-siRNA, and the changes in tube formation ability of the cells were analyzed using an in vitro angiogenesis assay. ELISA was performed to determine the concentration of VEGFA and Ang-1 in the conditioned media of HUVECs, and RT-qPCR was used to analyze the mRNA levels of VEGFA and Ang-1 in the HUVECs. The effects of exosomal FZD10 on the activation of PI3K, Erk1/2 and YAP/TAZ signaling pathways were evaluated using Western blotting. RESULTS Compared with BEAS-2B cells and their exosomes, 95D and H1299 cells and their exosomes all expressed high levels of FZD10 (P < 0.01). The exosomes derived from 95D and H1299 cells significantly enhanced tube formation ability and increased the expressions of VEGFA and Ang-1 protein and mRNA in HUVECs (P < 0.01), but FZD10 knockdown in 95D and H1299 cells obviously inhibited these effects of the exosomes. Exosomal FZD10 knockdown suppressed the activation of PI3K and Erk1/2 signaling pathways, but had no obvious effect on the activation of YAP/TAZ signaling pathway. CONCLUSION Exosomal FZD10 derived from NSCLC cells promotes HUVEC angiogenesis in vitro, the mechanism of which may involve the activation of PI3K and Erk1/2 signaling pathways.
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Affiliation(s)
- X Wu
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China.,Affiliated Hospital of Guangdong Medical University, Zhanjiang 524001, China
| | - R Zhan
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China.,Affiliated Hospital of Guangdong Medical University, Zhanjiang 524001, China
| | - D Cheng
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China.,Collaborative Innovation Center for Antitumor Active Substance Research and Development, Guangdong Medical University, Zhanjiang 524023, China
| | - L Chen
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China.,Collaborative Innovation Center for Antitumor Active Substance Research and Development, Guangdong Medical University, Zhanjiang 524023, China
| | - T Wang
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China.,Collaborative Innovation Center for Antitumor Active Substance Research and Development, Guangdong Medical University, Zhanjiang 524023, China
| | - X Tang
- Institute of Biochemistry and Molecular Biology, Guangdong Medical University, Zhanjiang 524023, China.,Collaborative Innovation Center for Antitumor Active Substance Research and Development, Guangdong Medical University, Zhanjiang 524023, China
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Wu W, Wang S, Zhang H, Guo W, Lu H, Xu H, Zhan R, Fidan O, Sun L. Biosynthesis of Novel Naphthoquinone Derivatives in the Commonly-used Chassis Cells Saccharomyces cerevisiae and Escherichia coli. APPL BIOCHEM MICRO+ 2021. [PMCID: PMC8700708 DOI: 10.1134/s0003683821100124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Naphthoquinones harboring 1,4-naphthoquinone pharmacophore are considered as privileged structures in medicinal chemistry. In pharmaceutical industry and fundamental research, polyketide naphthoquinones were widely produced by heterologous expression of polyketide synthases in microbial chassis cells, such as Saccharomyces cerevisiae and Escherichia coli. Nevertheless, these cell factories still remain, to a great degree, black boxes that often exceed engineers’ expectations. In this work, the biotransformation of juglone or 1,4-naphthoquinone was conducted to generate novel derivatives and it was revealed that these two naphthoquinones can indeed be modified by the chassis cells. Seventeen derivatives, including 6 novel compounds, were isolated and their structural characterizations indicated the attachment of certain metabolites of chassis cells to naphthoquinones. Some of these biosynthesized derivatives were reported as potent antimicrobial agents with reduced cytotoxic activities. Additionally, molecular docking as simple and quick in silico approach was performed to screen the biosynthesized compounds for their potential antiviral activity. It was found that compound 11 and 17 showed the most promising binding affinities against Nsp9 of SARS-CoV-2, demonstrating their potential antiviral activities. Overall, this work provides a new approach to generate novel molecules in the commonly used chassis cells, which would expand the chemical diversity for the drug development pipeline. It also reveals a novel insight into the potential of the catalytic power of the most widely used chassis cells.
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Affiliation(s)
- W. Wu
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, 510006 Guangzhou, P. R. China
- Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, 510006 Guangzhou, P. R. China
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, 510006 Guangzhou, P. R. China
| | - S. Wang
- Suzhou Institute of Drug Control, 215000 Suzhou, P. R. China
| | - H. Zhang
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, 510006 Guangzhou, P. R. China
- Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, 510006 Guangzhou, P. R. China
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, 510006 Guangzhou, P. R. China
| | - W. Guo
- Artemisinin Research Center, Guangzhou University of Chinese Medicine, 510405 Guangzhou, P. R. China
| | - H. Lu
- Suzhou Institute of Drug Control, 215000 Suzhou, P. R. China
| | - H. Xu
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, 510006 Guangzhou, P. R. China
- Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, 510006 Guangzhou, P. R. China
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, 510006 Guangzhou, P. R. China
| | - R. Zhan
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, 510006 Guangzhou, P. R. China
- Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, 510006 Guangzhou, P. R. China
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, 510006 Guangzhou, P. R. China
| | - O. Fidan
- Department of Bioengineering, Faculty of Life and Natural Sciences, Abdullah Gül University, 38080 Kayseri, Turkey
| | - L. Sun
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, 510006 Guangzhou, P. R. China
- Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education, 510006 Guangzhou, P. R. China
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, 510006 Guangzhou, P. R. China
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Zhan R, Wang S, Guo W, Gao X, Liu X, Xu K, Tang B. A simple, rapid and low-cost qPCR assay for evaluating the severity of exosomal PD-L1-mediated T cell exhaustion in blood samples. Chem Commun (Camb) 2021; 58:831-834. [PMID: 34931643 DOI: 10.1039/d1cc06496g] [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: 11/21/2022]
Abstract
A novel dual-aptamer activated proximity-induced qPCR assay was developed for the quantitative analysis of exosomal PD-L1 on T cell-exosome complexes in blood samples.
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Affiliation(s)
- Renhui Zhan
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China. .,Medicine & Pharmacy Research Center, Binzhou Medical University, Shandong, Yantai 264003, P. R. China
| | - Shanshan Wang
- Yantai Vocational College of Culture and Tourism, Shandong, Yantai, 264003, P. R. China
| | - Wenfei Guo
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China.
| | - Xiaonan Gao
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China.
| | - Xiaojun Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China.
| | - Kehua Xu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China.
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China.
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Zhan R, Guo W, Gao X, Liu X, Xu K, Tang B. Real-time in situ monitoring of Lon and Caspase-3 for assessing the state of cardiomyocytes under hypoxic conditions via a novel Au-Se fluorescent nanoprobe. Biosens Bioelectron 2021; 176:112965. [PMID: 33421759 DOI: 10.1016/j.bios.2021.112965] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 10/07/2020] [Revised: 12/23/2020] [Accepted: 12/30/2020] [Indexed: 12/22/2022]
Abstract
Myocardial dysfunction caused by cardiomyocyte apoptosis under ischemic and hypoxic conditions is the pathological basis of most cardiovascular diseases. Current diagnosis of myocardial dysfunction still focuses on the symptomatic stage, usually after the occurrence of the irreversible remodelling and functional impairment. Thus, early stage identification of the apoptotic cardiomyocytes induced by hypoxia is highly significant for preventing the onset and delaying the progression of myocardial dysfunction. Herein, a novel Au-Se nanoprobe with strong anti-interference capability was developed for simultaneous real-time in situ monitoring the expression of Lon protease (Lon) and Caspase-3 with high-fidelity in living cardiomyocytes. As Lon upregulation plays a major role in the initiation of hypoxia-induced apoptosis and Caspase-3 is a marker protein for apoptosis, the nanoprobe has been successfully applied for imaging the activation of Lon-Caspase-3 apoptotic signalling pathway and assessing the state of cardiomyocytes under hypoxic conditions. Furthermore, combining with mitochondrial H2O2 probe-MitoPY1, the nanoprobe was also used to confirm the synergistic effect of Lon and ROS on hypoxia-induced apoptosis of cardiomyocytes and evaluate the function of ROS scavenger on attenuating such apoptosis. This work proposed a promising strategy for early diagnosis, prevention and treatment of hypoxic-ischemic myocardial dysfunction.
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Affiliation(s)
- Renhui Zhan
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, PR China; Medicine & Pharmacy Research Center, Binzhou Medical University, Shandong, Yantai, 264003, PR China
| | - Wenfei Guo
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, PR China
| | - Xiaonan Gao
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, PR China
| | - Xiaojun Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, PR China
| | - Kehua Xu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, PR China.
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, PR China
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Zhan R, Li X, Zang L, Xu K. An Au-Se nanoprobe for the evaluation of the invasive potential of breast cancer cells via imaging the sequential activation of uPA and MMP-2. Analyst 2020; 145:1008-1013. [PMID: 31830149 DOI: 10.1039/c9an01830a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Urokinase-type plasminogen activator (uPA) has been shown to activate matrix metalloproteinase-2 (MMP-2) that leads to the migration and invasion of breast cancer cells. Overexpressed uPA and MMP-2 are regarded as signs of malignant tumors in clinical practice. Therefore, real-time monitoring of the sequential activation of these two signal molecules may have important implications for the evaluation of the invasive potential and tumor progression of breast cancer. However, due to the complicated intracellular environment, visualizing the dynamic changes of protein expression levels in living cells with a noninvasive method is still a great challenge. Here, a novel gold-selenium (Au-Se) fluorescent nanoprobe with excellent selectivity and strong anti-interference capability was designed for the simultaneous in situ imaging of uPA and MMP-2 and real-time monitoring of their changes in living cells. The imaging results demonstrated that the nanoprobe achieved a better prevention of glutathione interference compared to the conventional Au-S nanoprobe, thus it could be applied to actually reflect the expression level of uPA and MMP-2 in different breast cancer cells. Furthermore, the Au-Se nanoprobe could visually present the activation process of the two signal molecules, which play a dual role of insuring the invasiveness evaluation of breast cancer cells. Overall, our work offers a visual biomarker detection method for the judgment of the degree of breast cancer malignancy, and also provides an effective strategy to investigate the relationships among signal molecules of other signaling pathways in the future.
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Affiliation(s)
- Renhui Zhan
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China.
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Zhan R, Lu XL, Du XL, Zou GZ. [Gallbladder metastasis of lung adenocarcinoma: report of a case]. Zhonghua Bing Li Xue Za Zhi 2020; 49:751-753. [PMID: 32610394] [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: 06/11/2023]
Affiliation(s)
- R Zhan
- Department of Pathology, the Ninth People's Hospital of Suzhou, Jiangsu Province, Suzhou 215200, China
| | - X L Lu
- Department of Pathology, the Ninth People's Hospital of Suzhou, Jiangsu Province, Suzhou 215200, China
| | - X L Du
- Department of Pathology, the Affiliated Suzhou Science and Technology Town Hospital, Nanjing Medical University, Suzhou 215153, China
| | - G Z Zou
- Department of Pathology, the Ninth People's Hospital of Suzhou, Jiangsu Province, Suzhou 215200, China
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Zhan R, Guo W, Gao X, Liu X, Xu K, Tang B. Reconstruction of nano-flares based on Au–Se bonds for high-fidelity detection of RNA in living cells. Chem Commun (Camb) 2020; 56:5178-5181. [DOI: 10.1039/d0cc01213k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We have, for the first time, developed a Au–Se–DNA nanoprobe by upgrading the conventional Au–S bonds of nano-flares to more stable Au–Se bonds for high-fidelity imaging of target RNAs in living cells.
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Affiliation(s)
- Renhui Zhan
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Wenfei Guo
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Xiaonan Gao
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Xiaojun Liu
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Kehua Xu
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Bo Tang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
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Zhan R, Li X, Guo W, Liu X, Liu Z, Xu K, Tang B. An Aptamer-Based Near-Infrared Fluorescence Nanoprobe for Detecting and Imaging of Phospholamban Micropeptide in Cardiomyocytes. ACS Sens 2019; 4:733-739. [PMID: 30777430 DOI: 10.1021/acssensors.9b00026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A growing body of evidence indicates that micropeptides encoded by long noncoding RNAs (lncRNAs) act independently or as regulators of larger proteins in fundamental biological processes, especially in the maintenance of cellular homeostasis. However, due to their small size and low intracellular expression, visual monitoring of micropeptides in living cells is still a challenge. In this work, we have designed and synthesized an aptamer-based near-infrared fluorescence nanoprobe for fluorescence imaging of phospholamban (PLN), which is an intracellular micropeptide that affects calcium homeostasis, and is closely associated with human heart failure in the clinic. The nanoprobe could respond specifically to PLN with excellent selectivity, high sensitivity, good nuclease stability, and biocompatibility, and it was successfully applied for imaging of changes in PLN levels in cardiomyocytes and in frozen sections of heart tissues. Further combined with clinical myocardial biopsy, we believe that the developed nanoprobe should be of great significance in later molecular pathology study of heart failure, which may help with diagnosis of early heart failure in the future. More importantly, for the first time nanoprobes were applied to visually monitor the changes of micropeptides in living cells and in frozen tissue sections, and the design concept of the aptamer-based nanoprobe can be extended to fluorescence detection of other micropeptides.
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Affiliation(s)
- Renhui Zhan
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China
- Medicine & Pharmacy Research Center, Binzhou Medical University, Shandong, Yantai 264003, P. R. China
| | - Xiaofeng Li
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China
| | - Wenfei Guo
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China
| | - Xiaojun Liu
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China
| | - Zhixian Liu
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China
| | - Kehua Xu
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P. R. China
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Abstract
Background Hepatocellular carcinoma (HCC) is one of the most common malignant cancer worldwide. Importantly, the precise mechanisms causing HCC pathogenicity are still unknown. The identification of potential oncogenes plays significant roles in finding novel therapeutic targets for human HCC. Purpose WDR12 (WD repeat protein 12), a member of WD repeats family, plays crucial roles in the ribosome biogenesis pathway. However, Whether WDR12 contributes to HCC development remains unknown. The objective of this study was to elucidate the role of WDR12 in HCC development. Methods The expression level of WDR12 in HCC tissues and adjacent non-tumor tissues were detected form Gene Expression Omnibus (GEO) database. The expression level of WDR12 in HCC cell lines were examined by RT-PCR and western blot. Kaplan-Meier analysis were used to analyze the effect of WDR12 level on overall and disease-free survival of HCC patients. To examine whether WDR12 supports development of HCC, we inhibited expression of WDR12 by using an shRNA-encoding lentivirus system. Effects of WDR12 knockdown were evaluated on cell-growth, cell-proliferation and cell-migration. The mechanisms involved in HCC cells growth, proliferation and migration were analyzed by western blot assay. Results In silico analysis of HCC data sets showed that elevated expression of WDR12 correlated with high serum AFP level, high vascular invasion, high histologic grade and high TNM stage in HCC patients. Furthermore, up-regulated expression of WDR12 significantly correlated with the short overall survival and recurrence time of HCC patients. The shRNA-mediated knockdown of WDR12 expression resulted in reduced proliferation and migration of HepG2 and Huh-7 cells. Notably, inhibition of WDR12 resulted in decreased phosphorylation of AKT, mTOR and S6K1. Conclusion Our study indicates that WDR12 contributes to HCC propagation, and indicates that suppression of WDR12 may be a potential strategy for human HCC treatment.
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Affiliation(s)
- Yancun Yin
- Taishan Scholar Immunology Program, School of Basic Medical Sciences, Binzhou Medical University, Yantai 264003, Shandong, China
| | - Ling Zhou
- The Key Laboratory of Traditional Chinese Medicine Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine, School of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong, China
| | - Renhui Zhan
- Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai 264003, Shandong, China,
| | - Qiang Zhang
- Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai 264003, Shandong, China,
| | - Minjing Li
- Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai 264003, Shandong, China,
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Chen J, Li C, Zhan R, Yin Y. SPG6 supports development of acute myeloid leukemia by regulating BMPR2-Smad-Bcl-2/Bcl-xl signaling. Biochem Biophys Res Commun 2018; 501:220-225. [DOI: 10.1016/j.bbrc.2018.04.220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 04/27/2018] [Indexed: 01/28/2023]
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Abstract
AIM OF THE STUDY Idiopathic pulmonary fibrosis (IPF) is a lethal human disease with short survival time and few treatment options. In this study, we aim to demonstrate that cyclic nucleotide phosphodiesterase 1A (PDE1A), a Ca2+/calmodulin-stimulating PDE family member, plays a critical role in the induction of fibrosis and angiogenesis in the lung. MATERIALS AND METHODS To induce pulmonary damage, adult male SD rats were treated with bleomycin in a dose of 6 mg/kg body weight by a single intratracheal instillation. For in vivo silencing of PDE1A in rat lung, a nonspecific control siRNA or PDE1A-specific siRNA was used to treat rat through nasal instillation. Human normal pulmonary fibroblasts MRC-5 and hFL1 and rat lung fibroblasts were used as in vitro model. Immunohistochemistry and immunoflurescence staining were performed to detect PDE1A and α-SMA expression. Reverse transcription-qPCR was performed to detect microRNA and mRNA expression. In vitro wound healing assay was performed to detect pulmonary fibroblasts'mortality ability. RESULTS In vitro studies showed that PDE1A can stimulate lung fibroblasts to undergo myofibroblastic changes. This led to the identification of miR-541-5p as one of the miRNA candidates associated with bleomycin response. We found that miR-541-5p expression is downregulated in TGF-β-treated lung fibroblasts and the rat pulmonary fibrosis model. Overexpression of miR-541-5p in lung fibroblasts inhibited mortality of human lung fibroblasts. CONCLUSIONS MiR-541-5p is a key effector in lung fibroblastsby by regulating PDE1A expression at protein translation level and its overexpression is protective against bleomycin-induced lung fibrosis.
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Affiliation(s)
- Liqin Ren
- a Medicine and Pharmacy Research Center , Binzhou Medical University , Yantai , China
| | - Chunyan Yang
- a Medicine and Pharmacy Research Center , Binzhou Medical University , Yantai , China
| | - Yongfeng Dou
- b Binzhou Affiliated Hospital , Binzhou Medical University , Binzhou , China
| | - Renhui Zhan
- a Medicine and Pharmacy Research Center , Binzhou Medical University , Yantai , China
| | - Yi Sun
- c Department of Clinical Medicine , Binzhou Medical University , Yantai , China
| | - Yan Yu
- a Medicine and Pharmacy Research Center , Binzhou Medical University , Yantai , China
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Yin Y, Chen C, Chen J, Zhan R, Zhang Q, Xu X, Li D, Li M. Cell surface GRP78 facilitates hepatoma cells proliferation and migration by activating IGF-IR. Cell Signal 2017; 35:154-162. [DOI: 10.1016/j.cellsig.2017.04.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 03/06/2017] [Accepted: 04/03/2017] [Indexed: 12/23/2022]
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Li Y, Liu M, Zuo Z, Liu J, Yu X, Guan Y, Zhan R, Han Q, Zhang J, Zhou R, Sun R, Tian Z, Zhang C. TLR9 Regulates the NF-κB-NLRP3-IL-1β Pathway Negatively in Salmonella-Induced NKG2D-Mediated Intestinal Inflammation. J Immunol 2017; 199:761-773. [PMID: 28576980 DOI: 10.4049/jimmunol.1601416] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 05/18/2017] [Indexed: 12/28/2022]
Abstract
TLRs are key sensors for conserved bacterial molecules and play a critical role in host defense against invading pathogens. Although the roles of TLRs in defense against pathogen infection and in maintaining gut immune homeostasis have been studied, the precise functions of different TLRs in response to pathogen infection in the gut remain elusive. The present study investigated the role of TLR signaling in defense against the Gram-negative bacterial pathogen Salmonella typhimurium The results indicated that TLR9-deficient mice were more susceptible to S. typhimurium infection compared with wild-type and TLR2- or TLR4-deficient mice, as indicated by more severe intestinal damage and the highest bacterial load. TLR9 deficiency in intestinal epithelial cells (IECs) augmented the activation of NF-κB and NLRP3 inflammasomes significantly, resulting in increased secretion of IL-1β. IL-1β increased the expression of NKG2D on intestinal intraepithelial lymphocytes and NKG2D ligands on IECs, resulting in higher susceptibility of IECs to cytotoxicity of intestinal intraepithelial lymphocytes and damage to the epithelial barrier. We proposed that TLR9 regulates the NF-κB-NLRP3-IL-1β pathway negatively in Salmonella-induced NKG2D-mediated intestinal inflammation and plays a critical role in defense against S. typhimurium infection and in the protection of intestinal integrity.
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Affiliation(s)
- Yan Li
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Meifang Liu
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Zengyan Zuo
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Jing Liu
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Xin Yu
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Yun Guan
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Renhui Zhan
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Qiuju Han
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Jian Zhang
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
| | - Rongbin Zhou
- Institute of Immunology, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Rui Sun
- Institute of Immunology, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Zhigang Tian
- Institute of Immunology, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Cai Zhang
- Institute of Immunopharmacology and Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China; and
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Yang H, Zhou T, Wang H, Liu T, Ueda K, Zhan R, Zhao L, Tong Y, Tian X, Zhang T, Jin Y, Han X, Li Z, Zhao Y, Guo X, Xiao W, Fan D, Liu G, Chui D. Lipoprotein lipase deficiency leads to α-synuclein aggregation and ubiquitin C-terminal hydrolase L1 reduction. Neuroscience 2015; 290:1-10. [DOI: 10.1016/j.neuroscience.2014.12.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 12/29/2014] [Accepted: 12/30/2014] [Indexed: 10/24/2022]
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Pan J, He H, Feng L, Viñuela F, Wu Z, Zhan R. Angioarchitectural characteristics associated with complications of embolization in supratentorial brain arteriovenous malformation. AJNR Am J Neuroradiol 2013; 35:354-9. [PMID: 23886744 DOI: 10.3174/ajnr.a3643] [Citation(s) in RCA: 15] [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] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Embolization is an important therapeutic technique in brain arteriovenous malformations; however, little has been reported on the factors contributing to complications. We retrospectively reviewed a large series of supratentorial brain AVMs to identify the angioarchitectural characteristics that might be associated with the complications of embolization and poor clinical outcomes. MATERIALS AND METHODS The clinical and angiographic features of 130 consecutive patients with supratentorial brain AVMs embolized with ethylene-vinyl alcohol copolymer in our hospital from 2005-2008 were retrospectively reviewed. None of these patients had prior embolization. Complications were classified as transient neurologic deficits, persistent neurologic deficits, and death. Univariate and multivariate analyses were conducted to assess the angiographic features in patients with and without complications. RESULTS Twenty-three complications occurred in 130 embolization procedures, 13 (10%) were transient neurologic deficits (9 ischemic and 4 hemorrhagic), 9 (6.92%) were persistent neurologic deficits (7 ischemic and 2 hemorrhagic), and 1 death occurred. By univariate analyses, eloquent cortex (OR, 2.57; 95% CI, 1.08-3.42) and exclusive deep venous drainage (OR, 4.56; 95% CI, 1.28-9.67) were correlated with procedural complications. The impaction of eloquent cortical location (P = .001) and exclusive deep venous drainage (P = .035) on complications were also demonstrated by multivariate analysis. Eloquent cortex mainly resulted in permanent ischemic neurologic deficit; occlusion of drainage vein was significantly correlated with periprocedural hemorrhage in supratentorial brain AVMs with subtotal and partial embolization. CONCLUSIONS In a retrospective study on supratentorial brain AVMs with first-time embolization, 6.92% of patients had permanent neurologic deficit or death. Eloquent cortical location and exclusive deep venous drainage were associated with complications.
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Affiliation(s)
- J Pan
- From the Department of Neurosurgery (J.P., R.Z.), The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Ou Z, Zhan R, Tomachynski LA, Chernii VY, Kadish KM. Electrochemistry and spectroelectrochemistry of zirconium(IV) and hafnium(IV) phthalocyanines with b-diketone axial ligands. MACROHETEROCYCLES 2011. [DOI: 10.6060/mhc2011.3.04] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wu S, Huang S, Ding J, Zhao Y, Liang L, Liu T, Zhan R, He X. Multiple microRNAs modulate p21Cip1/Waf1 expression by directly targeting its 3' untranslated region. Oncogene 2010; 29:2302-8. [PMID: 20190813 DOI: 10.1038/onc.2010.34] [Citation(s) in RCA: 305] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Cyclin-dependent kinase inhibitor 1A (CDKN1A), also known as p21Cip1/Waf1, is a master downstream effector of tumor suppressors. In this study, we experimentally demonstrate through a high-throughput luciferase reporter screen that p21Cip1/Waf1 can be directly targeted by nearly 28 microRNAs (miRNAs). The results were further confirmed by a series of mutational analyses and luciferase reporter assays. These 28 miRNAs can substantially inhibit p21Cip1/Waf1 expression, predominantly at translational level. Many of these miRNAs were upregulated in cancers and might serve as modulators of oncogenesis. Furthermore, 8 of these 28 p21-regulating miRNAs are located in the chromosome 19 miRNA cluster, the largest miRNA gene cluster in humans, and they can clearly promote cell proliferation and cell-cycle progression in choriocarcinoma cells. In conclusion, our screening strategy provides an alternative approach to uncovering miRNA modulators of an individual mRNA, and it has identified multiple miRNAs that can suppress p21Cip1/Waf1 expression by directly targeting its 3' untranslated region.
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Affiliation(s)
- S Wu
- Department of Hematology, Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fuzhou, China
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21
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Xu X, Tong Y, Jin J, Zhan R, Zhou Y. A giant facial nerve schwannoma extending from the middle cranial fossa to the mastoid region: case report. J Int Med Res 2009; 37:247-52. [PMID: 19215697 DOI: 10.1177/147323000903700130] [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] [Indexed: 11/17/2022] Open
Abstract
Facial nerve schwannomas are uncommon benign tumours and seldom extend into the middle cranial fossa. This is a case report of a giant facial nerve schwannoma extending from the middle cranial fossa to the mastoid region, which was successfully removed using combined interdisciplinary subtemporal and transmastoid approaches. Complete resection of the tumour was the optimal therapy for this patient because the facial nerve had been severely destroyed by the tumour. The clinical presentation, histological features, radiological findings and management of this case, as well as the relevant literature, are presented.
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Affiliation(s)
- X Xu
- Department of Neurosurgery, the First Affiliated Hospital, Medical College, School of Medicine, Zhejiang University, Hangzhou, China
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Wan S, Teng X, Zhan R, Yu J, Gu J, Zhang K. Isolated intracranial Rosai-Dorfman disease mimicking suprasellar meningioma: case report with review of the literature. J Int Med Res 2008; 36:1134-9. [PMID: 18831912 DOI: 10.1177/147323000803600535] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [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: 11/15/2022] Open
Abstract
Rosai-Dorfman disease (RDD) is an idiopathic histiocytic proliferation affecting the lymph nodes. Isolated intracranial RDD is rare and usually appears as a well-defined, dural-based lesion without lymphadenopathy. The clinical and radiological features of intracranial RDD are similar to meningioma. Histopathology and immunohistochemistry are essential for a definitive diagnosis. This is a report of a 43-year old male with isolated intracranial RDD, which manifested as a suprasellar meningioma. The clinical, radiological and pathological aspects of the disease are discussed within the context of a review of previously reported cases.
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Affiliation(s)
- S Wan
- Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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Zhan R, Schiele R, Schneider S, Gitt AK, Heer T, Wienbergen H, Seidl K, Glunz HG, Hauptmann KE, Voigtländer T, Gottwik M, Senges J. [Long-term follow-up of patients with acute myocardial infarction treated with primary angioplasty or thrombolysis. Results of the MITRA trial]. Z Kardiol 2002; 91:49-57. [PMID: 11963207 DOI: 10.1007/s392-002-8371-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Long-term follow-up after treatment with primary angioplasty compared to treatment with thrombolysis in patients with acute myocardial infarction (AMI) remains still to be determined. We therefore analyzed the data of the "Maximal Individual Therapy" in Acute Myocardial Infarction (MITRA-1) Registry. Follow-up data for a median of 17 months after discharge were available in 2090 out of 2195 (95%) AMI patients treated with thrombolysis, as well as 293 out of 312 patients (94%) treated with primary angioplasty. There were only small differences in patient characteristics between the two treatment groups. Compared to patients treated with thrombolysis, those treated with primary angioplasty had a higher prevalence of prior myocardial infarction (16.4% versus 12.2%, p = 0.04), longer prehospital delay: 10 minutes (130 minutes versus 120 minutes, p = 0.002), and a longer door-to-treatment time: 45 minutes (p < 0.001). Primary angioplasty patients were more likely to be treated with beta-blockers (primary angioplasty 79.8% versus thrombolysis 66.2%, p < 0.001) or statins (24.5% versus 16.5%, p < 0.001). There was no difference between the treatment groups for total mortality (p = 0.90) nor for the combined endpoint of death or re-infarction (p = 0.85). However, the combined endpoint of death, re-infarction or percutaneous coronary intervention or coronary bypass surgery was significantly lower in the primary angioplasty group (primary angioplasty 25.6% versus thrombolysis 32.3%, univariate odds ratio 0.72, 95% CI: 0.55-0.95, p = 0.02). This result was confirmed by multivariate analysis after adjusting for confounding parameters (multivariate odds ratio: 0.62, 95% CI: 0.42-0.91). The beneficial effect of primary angioplasty compared to thrombolysis achieved during the hospital stay after an AMI is maintained during a 17 month follow-up. AMI patients treated with thrombolysis were more likely to be treated with either percutaneous coronary intervention or coronary bypass surgery after discharge.
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Affiliation(s)
- R Zhan
- Herzzentrum Ludwigshafen, Kardiologie Bremserstrasse 79 67063 Ludwigshafen, Germany.
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Okumura-Noji K, Sasai K, Zhan R, Kawaguchi H, Maruyama H, Tada T, Takahashi H, Okazaki M, Miida T, Sakuma N, Kimura G, Ohta N, Yokoyama S. Cholesteryl ester transfer protein deficiency causes slow egg embryonation of Schistosoma japonicum. Biochem Biophys Res Commun 2001; 286:305-10. [PMID: 11500037 DOI: 10.1006/bbrc.2001.5386] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/22/2022]
Abstract
In our attempt to discover a potential cause for accumulation of cholesteryl ester transfer protein (CETP) deficiency in Eastern Asia, we studied the association of CETP deficiency with pathogenesis of Schistosoma japonicum, a life-threatening parasite peculiar to this region. The eggs of S. japonicum showed slow embryonation when cultured in CETP-deficient human plasma. Restoration of CETP to the deficient plasma rescued it, while inhibition of CETP in normal plasma did not cause slow embryonation of the cultured eggs. The egg embryonation was also retarded in the liver but not in the intestine of wild-type mice in comparison to the CETP-transgenic mice. The granulomatous lesion around the parasite eggs in the liver was less in the wild-type than in the CETP-transgenic mice. Thus, CETP deficiency may act against Schistosomiasis japonica by retarding egg embryonation, a potential cause of liver granulomatosis. It does not seem directly due to the lack of CETP activity in plasma but to abnormal lipoprotein generated by chronic CETP deficiency.
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Affiliation(s)
- K Okumura-Noji
- Biochemistry 1, Nagoya City University, Kawasumi 1, Nagoya, 467-8601, Japan
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Gu H, Ni C, Zhan R. [The expression of CD15 mRNA CD44v6 mRNA and nm23H1 mRNA in breast cancer and their clinical significance]. Zhonghua Yi Xue Za Zhi 2000; 80:854-7. [PMID: 11218884] [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: 02/19/2023]
Abstract
OBJECTIVE To study the relationship of the expression of CD15 mRNA and its protein, CD44v6 mRNA and nm23H1 mRNA with the clinical pathology parameter and prognosis of breast cancer, and to investigate the correlation of the expression of CD15 mRNA with CD44v6 mRNA and nm23H1 mRNA. METHODS Catalyzed signal amplification (CSA) method of in situ hybridization and immunohistochemistry were used to detect the expression of CD15 mRNA and its protein, CD44v6 mRNA and nm23H1 mRNA in 94 cases of breast cancer. RESULTS The overexpression of CD15 mRNA and its protein and CD44v6 mRNA and the low expression nm23H1 mRNA were correlated with the grading, clinical stage, lymph node metastasis, recurrence and prognosis of breast cancer. Patients who had overexpression of CD15 mRNA and CD44v6 mRNA and low expression of nm23H1 mRNA had a higher lymph node metastatic rate and a lower survival rate. CONCLUSION The expression of CD15 mRNA has a synergistic action in positive and negative regulation with that of CD44v6 mRNA and nm23H1 mRNA. Combining detection of the expression of these three mRNA is a reliable index to evaluate the metastasis, recurrence and prognosis of breast cancer.
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Affiliation(s)
- H Gu
- Department of Pathology, Chinese PLA 251 Hospital, Zhangjiakou 075000, China
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Abstract
The fatty acid profile and beta-carotene content of a number of Australian varieties of purslane (Portulaca oleracea) were determined by GC and HPLC. The total fatty acid content ranged from 1.5 to 2.5 mg/g of fresh mass in leaves, 0.6 to 0.9 mg/g in stems and 80 to 170 mg/g in seeds. alpha-Linolenic acid (C18:3omega3) accounted for around 60% and 40% of the total fatty acid content in leaves and seeds, respectively. Longer-chain omega-3 fatty acids were not detected. The beta-carotene content ranged from 22 to 30 mg/g fresh mass in leaves. These results indicate that Australian purslane varieties are a rich source of alpha-linolenic acid and beta-carotene.
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Affiliation(s)
- L Liu
- Smart Foods Centre, University of Wollongong, NSW, Australia
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27
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Zhan R. Loss of cytochrome c form mitochondria is responsible for ischemic hippocampal CA1 neuron death. Neurosci Res 2000. [DOI: 10.1016/s0168-0102(00)81712-5] [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: 11/26/2022]
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28
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Wu C, Zhan R, Huang W. A slotted waveguide field applicator to sustain large diameter uniform plasma cylinders. J Microw Power Electromagn Energy 2000; 35:57-61. [PMID: 10834190 DOI: 10.1080/08327823.2000.11688420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We describe a slotted waveguide field applicator and present the results of experimental investigation. The experimental results show that it can efficiently transfer power to plasma in the wide pressure range. Specially, it is able to produce a large diameter uniform plasma cylinder with diameter over 160 mm. The electron temperature and density are 2-4 eV and 10(10)-10(11) cm-3, respectively, under conditions of the pressure below 135 Pa and the microwave power 500-900 w. In addition, the primary study of the surface-wave modes indicate that the mode of m = 6 can be excited and propagate.
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Affiliation(s)
- C Wu
- Structure Research Laboratory, University of Science & Technology of China, Hefei, Anhui, P. R. China
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29
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Lu L, Chen Z, Chen Y, Zhang X, Shen J, Zhan R. [Advances in hematology in the recent decade in China]. Zhonghua Nei Ke Za Zhi 1999; 38:610-4. [PMID: 12797331] [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: 03/03/2023]
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30
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Zhu M, Dai Y, Zhan R. [HBxAg enhanced p53 protein accumulation in hepatoma cells]. Zhonghua Bing Li Xue Za Zhi 1999; 28:31-4. [PMID: 11869509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE In order to determine the interaction between HBxAg and p53 protein and its role in hepatocarcinogenesis. METHODS Cotransfection was performed using reporter gene, chloramphenical acetyltransferase (CAT), p53 and HBVx gene, and dexamethasone inducible HBx plasmid pMAMHBx was constructed for the experiment. Human hepatoma cell line Hep3B was used as the target cell. The activity of HBxAg and p53 was detected by CAT assay and immunohistochemical staining after transient transfection. RESULTS HBxAg could increase the accumulation of p53 protein in cells and enhance CAT expression. Immunohistochemical staining showed that p53 protein bound to HBxAg in the cytoplasm and formed a complex causing a partial block of the process of p53 during passing through the nuclear membrane from the cytoplasm. CONCLUSION Data strongly suggested that HBxAg is capable of binding p53 and forms a protein-protein complex which might reduce or inactivate p53's antiproliferative activity and plays an important role in the pathogenesis of HBV-associated hepatocellular carcinoma.
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Affiliation(s)
- M Zhu
- Department of Pathology, Second Military Medical University, Shanghai 200433
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31
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Du Q, Fu H, Zhan R, Yao Y, Li X. [Study on tissue culture of Poligonum multiflorum]. Zhong Yao Cai 1998; 21:109-10. [PMID: 12567935] [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: 02/28/2023]
Abstract
In the present thesis, suitable medium for callus inducement and relationship between culture time and callus growth of Poligonum multiflorum were studied by mono-factorial and orthogonal design test. The experiments showed that the best medium for callus inducement was MS + 2,4-D 1 mg/L + 6-BA 1 mg/L + IBA 0.5 mg/L, dark culture was better than light culture, callus grew fast when it was cultured 12 days, whole plant could be induced by callus, the induce rate was 95%.
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Affiliation(s)
- Q Du
- Guangzhou University of TCM, Guangzhou 510407
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32
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Gonzalez-Vallina R, Wang H, Zhan R, Berschneider HM, Lee RM, Davidson NO, Black DD. Lipoprotein and apolipoprotein secretion by a newborn piglet intestinal cell line (IPEC-1). Am J Physiol 1996; 271:G249-59. [PMID: 8770040 DOI: 10.1152/ajpgi.1996.271.2.g249] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The aim of these studies was to characterize the synthesis and secretion of lipoproteins and apolipoprotein B (apo B) and apo A-I by a newborn swine intestinal epithelial cell line (IPEC-1). Differentiated cells exhibited enterocytic features, including microvilli. [3H] oleic acid was taken up and incorporated into cellular lipids and secreted into the basolateral medium in lipoproteins. Total apo B and apo A-I secreted increased with oleic acid incubation. However, cellular apo B and apo A-I content did not change. Whereas undifferentiated cells synthesized and secreted only apo B-100, both apo B-100 and apo B-48 were produced by differentiated cells. The ratio of radiolabeled apo B-48 to apo B-100 in both basolateral medium and cell homogenate increased with oleic acid treatment after 24-h steady-state labeling. However, apo B mRNA editing was unchanged, indicating posttranslational regulation of this ratio. Pulse-chase radiolabeling demonstrated no major changes in cellular or basolateral medium apolipoprotein labeling kinetics with oleic acid or dexamethasone incubation. The dissociation of apo B and apo A-I mass secretion from the secretion of radiolabeled apo B and apo A-I in response to oleic acid absorption suggests the presence of an intracellular pool of apolipoprotein with a slow turnover that is mobilized for secretion in response to fatty acid uptake.
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Affiliation(s)
- R Gonzalez-Vallina
- Department of Pediatrics, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Little Rock 72202, USA
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33
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Abstract
The purpose of this study was to determine the effects of dietary fatty acids of varying chain lengths and degrees of saturation on intestinal apolipoprotein (apo) B and A-I expression in the newborn piglet. Two-day-old female piglets received one of three isocaloric formulas containing 48% of total calories (120 kcal/kg/24 h) as medium-chain triglycerides (MCT) from MCT oil, intermediate-chain saturated triglycerides (ICST) from coconut oil, or long-chain polyunsaturated triglycerides (LCPUT) from safflower oil by continuous duodenal infusion for 24 h. After in situ radiolabeling, jejunal and ileal mucosal apo B-48 and A-I were immunoprecipitated, and synthesis was expressed as percentage of total protein synthesis. Mucosal apo B and A-I mass was measured by ELISA as nanograms of apoprotein/microgram of total protein. Fifty percent less apo B jejunal synthesis was present in the ICST group versus the MCT and LCPUT groups (0.67 +/- 0.07, 1.19 +/- 0.20, and 1.25 +/- 0.15, respectively, mean +/- SEM, p < 0.05). Jejunal apo B mass was lower in the MCT group versus the ICST and LCPUT groups (0.10 +/- 0.02, 0.21 +/- 0.03, and 0.16 +/- 0.03, respectively, p < 0.05). Ileal apo B synthesis was lowest in the ICST group. No differences were found in ileal apo B mass. Two-fold higher jejunal apo A-I synthesis was found in the LCPUT group versus the MCT and ICST groups (14.18 +/- 1.69, 7.56 +/- 2.63, and 6.36 +/- 0.58, respectively, p < 0.01). No differences were found for jejunal apo A-I mass. In the ileum, the only difference was a higher apo A-I mass in the LCPUT group (p < 0.05). We conclude that in the newborn piglet intestinal apo B and A-I expression is acutely and differentially regulated by dietary lipid varying in fatty acid chain length and saturation. The patterns of regulation are complex and vary among specific apolipoproteins and regions of the small intestine and include co- and posttranslational mechanisms.
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Affiliation(s)
- H Wang
- Department of Pediatrics, University of Arkansas for Medical Sciences, Arkansas Children's Hospital Research Institute, Little Rock 72202, USA
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Black DD, Wang H, Hunter F, Zhan R. Intestinal expression of apolipoprotein A-IV and C-III is coordinately regulated by dietary lipid in newborn swine. Biochem Biophys Res Commun 1996; 221:619-24. [PMID: 8630010 DOI: 10.1006/bbrc.1996.0645] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The purpose of this study was to determine the effects of dietary fatty acids on intestinal apolipoprotein (apo) A-IV and C-III expression in the newborn piglet. Two-day-old female piglets received one of three isocaloric formulas containing medium-chain triglycerides (TG) (MCT), intermediate-chain saturated TG (ICST), or long-chain polyunsaturated TG (LCPUT) by continuous duodenal infusion for 24 hrs. Control groups received a low-TG elemental formula infusion (LTG group) and a high-TG long-chain unsaturated lipid emulsion infusion (HTG group). Jejunal synthesis of both apo A-IV and C-III was increased by all infusions compared to the LTG group. Apo A-IV and C-III mRNA levels paralleled synthesis levels except for apo C-III with the MCT diet, where regulation appeared to occur at the translational level. Among all groups, apo A-IV synthesis and mRNA abundance were linearly correlated with that of apo C-III.
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Affiliation(s)
- D D Black
- Department of Pediatrics, University of Arkansas for Medical Sciences, Arkansas Children's Hospital Research Institute, Little Rock 72202, USA
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35
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Abstract
The nucleotide sequence of the swine apoA-I gene (encoding apolipoprotein) has been determined. The structure of the gene is similar to that of the human gene, and the exons exhibit a high degree of homology with those of the human gene. The porcine apoA-I gene is located adjacent to the apoC-III gene, as in humans.
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Affiliation(s)
- V N Trieu
- Department of Pediatrics, University of Chicago, Pritzker School of Medicine, IL 60637
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36
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Abstract
Deficiency of hepatic lipase (HL) may play a role in the lipoprotein abnormalities in chronic inflammatory states which are characterized by reticuloendothelial-system activation and cytokine release. HL triacylglycerol hydrolase activity was measured in heparin perfusates of livers from autoimmune MRL/lpr mice, which spontaneously develop a condition closely resembling human lupus erythematosis and exhibit spontaneous Kupffer-cell activation after 8 weeks of age, as well as from normal mice treated with Corynebacterium parvum or polyinosinic-polycytidylic acid complex [poly(I.C)] to induce Kupffer-cell activation. HL activity in MRL/lpr mice older than 8 weeks was 29.5% (P = 0.002) of that in age-matched control MRL/++ mice. Treatment of normal mice with C. parvum or poly(I.C) resulted in HL activities 18.6% (P = 0.004) and 13.1% (P = 0.007) respectively of untreated controls. Northern-blot hybridization of liver poly(A)+ RNA showed no differences in HL mRNA abundance in MRL/++ mice compared with the MRL/lpr autoimmune strain after 8 weeks of age, or in normal control mice compared with those treated with C. parvum, indicating attenuation of HL activity at the translational or post-translational level. Deficiency of this enzyme may represent one of the mechanisms contributing to the dyslipoproteinaemia of autoimmune disease and chronic infection.
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Affiliation(s)
- D B Magilavy
- Department of Pediatrics, University of Chicago, La Rabida Hospital, IL 60637
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