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Deykin AV, Shcheblykina OV, Povetka EE, Golubinskaya PA, Pokrovsky VM, Korokina LV, Vanchenko OA, Kuzubova EV, Trunov KS, Vasyutkin VV, Radchenko AI, Danilenko AP, Stepenko JV, Kochkarova IS, Belyaeva VS, Yakushev VI. Genetically modified animals for use in biopharmacology: from research to production. RESEARCH RESULTS IN PHARMACOLOGY 2021. [DOI: 10.3897/rrpharmacology.7.76685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Introduction: In this review, the analysis of technologies for obtaining biologically active proteins from various sources is carried out, and the comparative analysis of technologies for creating producers of biologically active proteins is presented. Special attention is paid to genetically modified animals as bioreactors for the pharmaceutical industry of a new type. The necessity of improving the technology of development transgenic rabbit producers and creating a platform solution for the production of biological products is substantiated.
The advantages of using TrB for the production of recombinant proteins: The main advantages of using TrB are the low cost of obtaining valuable complex therapeutic human proteins in readily accessible fluids, their greater safety relative to proteins isolated directly from human blood, and the greater safety of the activity of the native protein.
The advantages of the mammary gland as a system for the expression of recombinant proteins: The mammary gland is the organ of choice for the expression of valuable recombinant proteins because milk is easy to collect in large volumes.
Methods for obtaining transgenic animals: The modern understanding of the regulation of gene expression and the discovery of new tools for gene editing can increase the efficiency of creating bioreactors for animals and help to obtain high concentrations of the target protein.
The advantages of using rabbits as bioreactors producing recombinant proteins in milk: The rabbit is a relatively small animal with a short duration of gestation, puberty and optimal size, capable of producing up to 5 liters of milk per year per female, receiving up to 300 grams of the target protein.
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Gong G, Zhang W, Xie L, Xu L, Han S, Hu Y. Expression of a recombinant anti-programed cell death 1 antibody in the mammary gland of transgenic mice. Prep Biochem Biotechnol 2020; 51:183-190. [PMID: 32808868 DOI: 10.1080/10826068.2020.1805755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Nivolumab, a fully human IgG4 anti-programed cell death 1(PD-1)antibody, is recently one of the most popular and successful therapeutic monoclonal antibodies in clinical use. With the increasing demands for Nivolumab and other therapeutic monoclonal antibodies, the mammary gland bioreactor has been regarded as another choice for the production of recombinant monoclonal antibodies besides mammalian cell culture. Here, we expressed a recombinant human anti-PD-1 antibody in the mammary glands of transgenic mice. Two expression vectors were constructed bearing the heavy and light chains of anti-PD-1 antibody respectively under the control of bovine αs1-casein promoter. Transgenic mice were then generated by co-microinjection of the two expression cassettes. Three F0 founders with both heavy chain and light chain positive were obtained. Transgenes of both chains were detected to be stably transmitted to the offspring. The recombinant antibody was detected in the milk of transgenic mice with the highest expression level up to 80.52 ± 0.82 mg/L and could specifically binds to the human PD-1 antigen. Therefore, our results suggest the feasibility of anti-PD-1 antibody production in the milk of transgenic animals.
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Affiliation(s)
- Guihua Gong
- China State Institute of Pharmaceutical Industry, Shanghai, P. R. China
| | - Wei Zhang
- China State Institute of Pharmaceutical Industry, Shanghai, P. R. China
| | - Liping Xie
- China State Institute of Pharmaceutical Industry, Shanghai, P. R. China
| | - Lei Xu
- China State Institute of Pharmaceutical Industry, Shanghai, P. R. China
| | - Shu Han
- China State Institute of Pharmaceutical Industry, Shanghai, P. R. China
| | - Youjia Hu
- China State Institute of Pharmaceutical Industry, Shanghai, P. R. China
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Aboul-Enein BH, Puddy WC, Bowser JE. The 1925 Diphtheria Antitoxin Run to Nome - Alaska: A Public Health Illustration of Human-Animal Collaboration. THE JOURNAL OF MEDICAL HUMANITIES 2019; 40:287-296. [PMID: 28032302 DOI: 10.1007/s10912-016-9428-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Diphtheria is an acute toxin-mediated superficial infection of the respiratory tract or skin caused by the aerobic gram-positive bacillus Corynebacterium diphtheriae. The epidemiology of infection and clinical manifestations of the disease vary in different parts of the world. Historical accounts of diphtheria epidemics have been described in many parts of the world since antiquity. Developed in the late 19th century, the diphtheria antitoxin (DAT) played a pivotal role in the history of public health and vaccinology prior to the advent of the diphtheria-tetanus toxoids and acellular pertussis (DTaP) vaccine. One of the most significant demonstrations of the importance of DAT was its use in the 1925 diphtheria epidemic of Nome, Alaska. Coordinated emergency delivery of this life-saving antitoxin by dog-sled relay in the harshest of conditions has left a profound legacy in the annals of vaccinology and public health. Lead dogs Balto and Togo, and the dog-led antitoxin run of 1925 represent a dynamic illustration of the contribution made by non-human species towards mass immunization in the history of vaccinology. This unique example of cooperative interspecies fellowship and collaboration highlights the importance of the human-animal bond in the one-health initiative.
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Affiliation(s)
- Basil H Aboul-Enein
- Department of Global Health & Development, London School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK.
| | | | - Jacquelyn E Bowser
- College of Veterinary Medicine, Mississippi State University, 240 Wise Center Dr, Starkville, MS, 39762, USA
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Kalmykov VA, Kusov PA, Deykin AV. Development of a Multiplex PCR Test System for the Determination of a Transgene Based on the pBC1 Plasmid and Its Derivatives for the Expression of Recombinant Proteins in Mus musculus Milk. DOKL BIOCHEM BIOPHYS 2019; 485:153-156. [PMID: 31201639 DOI: 10.1134/s1607672919020212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Indexed: 11/23/2022]
Abstract
A multiplex PCR test system for identification of the regulatory sequences of genetic constructs for transformation (promotor, insulator, and terminator) in the Mus musculus genome and for transgenic animal selection by genotyping with horizontal agarose gel electrophoresis detection was developed. The proposed system was validated by genotyping mouse strains producing human lactoferrin, heat shock protein HSP 70, firefly luciferase, and lysozyme, which were obtained by microinjections of linearized DNA into murine zygote pronucleus with random transgene integration into the genome using the pBC1 plasmid for expression of the gene of interest in milk of transformed animals (milk expression vector kit).
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Affiliation(s)
- V A Kalmykov
- Institute of Gene Biology, Russian Academy of Sciences, 119334, Moscow, Russia
| | - P A Kusov
- Institute of Gene Biology, Russian Academy of Sciences, 119334, Moscow, Russia.,Skolkovo Institute of Science and Technology, 143025, Skolkovo, Moscow oblast, Russia
| | - A V Deykin
- Institute of Gene Biology, Russian Academy of Sciences, 119334, Moscow, Russia. .,Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, 125315, Moscow, Russia.
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Pan Z, Li S, Liu Q, Wang Z, Zhou Z, Di R, Miao B, Hu W, Wang X, Hu X, Xu Z, Wei D, He X, Yuan L, Guo X, Liang B, Wang R, Li X, Cao X, Dong X, Xia Q, Shi H, Hao G, Yang J, Luosang C, Zhao Y, Jin M, Zhang Y, Lv S, Li F, Ding G, Chu M, Li Y. Whole-genome sequences of 89 Chinese sheep suggest role of RXFP2 in the development of unique horn phenotype as response to semi-feralization. Gigascience 2018; 7:4924504. [PMID: 29668959 PMCID: PMC5905515 DOI: 10.1093/gigascience/giy019] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 02/22/2018] [Indexed: 12/30/2022] Open
Abstract
Background Animal domestication has been extensively studied, but the process of feralization remains poorly understood. Results Here, we performed whole-genome sequencing of 99 sheep and identified a primary genetic divergence between 2 heterogeneous populations in the Tibetan Plateau, including 1 semi-feral lineage. Selective sweep and candidate gene analysis revealed local adaptations of these sheep associated with sensory perception, muscle strength, eating habit, mating process, and aggressive behavior. In particular, a horn-related gene, RXFP2, showed signs of rapid evolution specifically in the semi-feral breeds. A unique haplotype and repressed horn-related tissue expression of RXFP2 were correlated with higher horn length, as well as spiral and horizontally extended horn shape. Conclusions Semi-feralization has an extensive impact on diverse phenotypic traits of sheep. By acquiring features like those of their wild ancestors, semi-feral sheep were able to regain fitness while in frequent contact with wild surroundings and rare human interventions. This study provides a new insight into the evolution of domestic animals when human interventions are no longer dominant.
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Affiliation(s)
- Zhangyuan Pan
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.,College of Agriculture and Forestry Science, Linyi University, Linyi, China
| | - Shengdi Li
- Key Lab of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Qiuyue Liu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhen Wang
- Key Lab of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Zhengkui Zhou
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ran Di
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Benpeng Miao
- Key Lab of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Wenping Hu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiangyu Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaoxiang Hu
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
| | - Ze Xu
- BasePair BioTechonology Co., Ltd., Suzhou, China
| | - Dongkai Wei
- BasePair BioTechonology Co., Ltd., Suzhou, China
| | - Xiaoyun He
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Liyun Yuan
- Key Lab of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiaofei Guo
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Benmeng Liang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ruichao Wang
- Key Lab of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiaoyu Li
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaohan Cao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xinlong Dong
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qing Xia
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hongcai Shi
- Institute of Biotechnology, Xinjiang Academy of Animal Science, Urumqi, China
| | - Geng Hao
- Institute of Animal Science, Xinjiang Academy of Animal Science, Urumqi, China
| | - Jean Yang
- Research Institute of Animal Science, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, China
| | - Cuicheng Luosang
- Research Institute of Animal Science, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, China
| | - Yiqiang Zhao
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
| | - Mei Jin
- College of Life Science, Liaoning Normal University, Dalian, China
| | - Yingjie Zhang
- College of Animal Science and Technology, Agricultural University of Hebei, Baoding, China
| | - Shenjin Lv
- College of Agriculture and Forestry Science, Linyi University, Linyi, China
| | - Fukuan Li
- College of Agriculture and Forestry Science, Linyi University, Linyi, China
| | - Guohui Ding
- Key Lab of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,Shanghai Center for Bioinformation Technology, Shanghai Industrial Technology Institute, Shanghai, China
| | - Mingxing Chu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yixue Li
- Key Lab of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.,Shanghai Center for Bioinformation Technology, Shanghai Industrial Technology Institute, Shanghai, China
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Cui D, Zhang L, Li J, Zhao Y, Hu X, Dai Y, Zhang R, Li N. Bovine FcRn-mediated human immunoglobulin G transfer across the milk-blood barrier in transgenic mice. PLoS One 2014; 9:e115972. [PMID: 25546424 PMCID: PMC4278800 DOI: 10.1371/journal.pone.0115972] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 11/28/2014] [Indexed: 11/18/2022] Open
Abstract
Maternal-fetal IgGs transport occurs either prenatally or postnatally, which confers the newborns with passive immunity before their own immune system has matured. However, little is known about the mechanisms of postnatal IgGs passage in the mammary gland. To investigate how FcRn mediates the IgGs transport in the mammary gland, we first generated bFcRn and anti-HAV mAb transgenic mice, and then obtained HF transgenic mice expressing both transgenes by mating the above two strains. Transgene expression of bFcRn in the four lines was determined by qRT-PCR and western blot. We then localized the expression of bFcRn to the acinar epithelial cells in the mammary gland, and anti-HAV mAb was mainly detected in the acini with weak staining in the acinar epithelial cells. Human IgGs could be detected in both milk and serum of HF transgenic mice by western blot and ELISA. A significantly lower milk to serum ratio of human IgGs in HF mice compared with that of anti-HAV mAb mice, indicating that bFcRn could transport human IgGs across the milk-blood barrier from milk to serum during lactation in HF mice. While, there were no transport of murine IgGs, IgAs, or IgMs. These results provide understandings about the mechanisms of maternal-fetal immunity transfer in the mammary gland.
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Affiliation(s)
- Dan Cui
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
| | - Linlin Zhang
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
| | - Jia Li
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
| | - Yaofeng Zhao
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
| | - Xiaoxiang Hu
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
| | | | - Ran Zhang
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
- * E-mail: (RZ); (NL)
| | - Ning Li
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, China
- * E-mail: (RZ); (NL)
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Wang Y, Sheng Z, Wang Y, Li Q, Gao Y, Wang Y, Dai Y, Liu G, Zhao Y, Li N. Transgenic Mouse Milk Expressing Human Bile Salt-Stimulated Lipase Improves the Survival and Growth Status of Premature Mice. Mol Biotechnol 2014; 57:287-97. [DOI: 10.1007/s12033-014-9822-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Frenzel A, Hust M, Schirrmann T. Expression of recombinant antibodies. Front Immunol 2013; 4:217. [PMID: 23908655 PMCID: PMC3725456 DOI: 10.3389/fimmu.2013.00217] [Citation(s) in RCA: 219] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 07/15/2013] [Indexed: 12/15/2022] Open
Abstract
Recombinant antibodies are highly specific detection probes in research, diagnostics, and have emerged over the last two decades as the fastest growing class of therapeutic proteins. Antibody generation has been dramatically accelerated by in vitro selection systems, particularly phage display. An increasing variety of recombinant production systems have been developed, ranging from Gram-negative and positive bacteria, yeasts and filamentous fungi, insect cell lines, mammalian cells to transgenic plants and animals. Currently, almost all therapeutic antibodies are still produced in mammalian cell lines in order to reduce the risk of immunogenicity due to altered, non-human glycosylation patterns. However, recent developments of glycosylation-engineered yeast, insect cell lines, and transgenic plants are promising to obtain antibodies with "human-like" post-translational modifications. Furthermore, smaller antibody fragments including bispecific antibodies without any glycosylation are successfully produced in bacteria and have advanced to clinical testing. The first therapeutic antibody products from a non-mammalian source can be expected in coming next years. In this review, we focus on current antibody production systems including their usability for different applications.
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Affiliation(s)
- André Frenzel
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Braunschweig, Germany
| | - Michael Hust
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Braunschweig, Germany
| | - Thomas Schirrmann
- Abteilung Biotechnologie, Institut für Biochemie, Biotechnologie und Bioinformatik, Technische Universität Braunschweig, Braunschweig, Germany
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9
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Maksimenko OG, Deykin A, Khodarovich YM, Georgiev PG. Use of transgenic animals in biotechnology: prospects and problems. Acta Naturae 2013; 5:33-46. [PMID: 23556129 PMCID: PMC3612824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
During the past two decades, there have been numerous attempts at using animals in order to produce recombinant human proteins and monoclonal antibodies. However, it is only recently that the first two therapeutic agents isolated from the milk of transgenic animals, C1 inhibitor (Ruconest) and antithrombin (ATryn), appeared on the market. This inspires hope that a considerable number of new recombinant proteins created using such technology could become available for practical use in the near future. In this review, the methods applied to produce transgenic animals are described and the advantages and drawbacks related to their use for producing recombinant human proteins and monoclonal antibodies are discussed.
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Affiliation(s)
- O. G. Maksimenko
- Institute of Gene Biology of the Russian Academy of Sciences, Vavilov St., 34/5, Moscow, Russia, 119334
| | - A.V. Deykin
- Institute of Gene Biology of the Russian Academy of Sciences, Vavilov St., 34/5, Moscow, Russia, 119334
| | - Yu. M. Khodarovich
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklucho-Maklai St., 16/10, Moscow, Russia, 117997
| | - P. G. Georgiev
- Institute of Gene Biology of the Russian Academy of Sciences, Vavilov St., 34/5, Moscow, Russia, 119334
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Daudi N, Shouval D, Stein-Zamir C, Ackerman Z. Breastmilk hepatitis A virus RNA in nursing mothers with acute hepatitis A virus infection. Breastfeed Med 2012; 7:313-5. [PMID: 22537111 DOI: 10.1089/bfm.2011.0084] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Breastmilk specimens from three women with acute hepatitis A virus (HAV) infection were studied. Anti-HAV immunoglobulin M and immunoglobulin G antibodies were detected in serum and breastmilk specimens of the three women. The three women also had serum HAV RNA. However, HAV RNA was detected only in two of the three breastmilk specimens. It is interesting that none of the three infants contracted clinical HAV infection. Furthermore, mothers with HAV infection should not be encouraged to discontinue breastfeeding.
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Affiliation(s)
- Nili Daudi
- Liver Unit, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
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11
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Ma X, Zhang P, Song G, Chen Y, Wang Z, Yin Y, Kong D, Zhang S, Zhao Z, Ouyang H, Tang B, Li Z. The construction and expression of lysine-rich gene in the mammary gland of transgenic mice. DNA Cell Biol 2012; 31:1372-83. [PMID: 22577831 DOI: 10.1089/dna.2011.1599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Lysine is the limiting amino acid in cereal grains, which represent a major source of human food and animal feed worldwide, and is considered the most important of the essential amino acids. In this study, β-casein, αS2-casein, and lactotransferrin cDNA clone fragments encoding lysine-rich peptides were fused together to generate a lysine-rich (LR) gene and the mammary gland-specific expression vector pBC1-LR-NEO(r) was constructed. Transgenic mice were generated by pronuclear microinjection of the linearized expression vectors harboring the LR transgene. The transgenic mice and their offspring were examined using multiplex polymerase chain reaction (PCR), Southern blotting, reverse transcriptase-PCR, in situ hybridization, and Western blotting techniques. Our results showed that the LR gene was successfully integrated into the mouse genome and was transmitted stably. The specific LR gene expression was restricted to the mammary gland, active alveoli of the transgenic female mice during lactation. The lysine level of the two transgenic lines was significantly higher than that of nontransgenic controls (p<0.05). In addition, the growth performance of transgenic pups was enhanced by directly feeding them the LR protein-enriched transgenic milk. Our results demonstrated that lysine-rich gene was successfully constructed and expressed in mammary gland of transgenic mice. This study will provide a better understanding of how mammary gland expression systems that increase the lysine content of milk can be applied to other mammals, such as cows.
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Affiliation(s)
- Xin Ma
- Jilin Provincial Key Laboratory of Animal Embryo Engineering, The Center for Animal Embryo Engineering of Jilin Province, College of Animal Science and Veterinary Medicine, Jilin University, Changchun, Jilin, China
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Over-expression of human lipoprotein lipase in mouse mammary glands leads to reduction of milk triglyceride and delayed growth of suckling pups. PLoS One 2011; 6:e20895. [PMID: 21698114 PMCID: PMC3117854 DOI: 10.1371/journal.pone.0020895] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 05/12/2011] [Indexed: 11/29/2022] Open
Abstract
Background The mammary gland is a conserved site of lipoprotein lipase expression across species and lipoprotein lipase attachment to the luminal surface of mammary gland vascular endothelial cells has been implicated in the direction of circulating triglycerides into milk synthesis during lactation. Principal Findings Here we report generation of transgenic mice harboring a human lipoprotein lipase gene driven by a mammary gland-specific promoter. Lipoprotein lipase levels in transgenic milk was raised to 0.16 mg/ml, corresponding to an activity of 8772.95 mU/ml. High lipoprotein lipase activity led to a significant reduction of triglyceride concentration in milk, but other components were largely unchanged. Normal pups fed with transgenic milk showed inferior growth performances compared to those fed with normal milk. Conclusion Our study suggests a possibility to reduce the triglyceride content of cow milk using transgenic technology.
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Expression of humanized anti-Her2/neu single-chain IgG1-like antibody in mammary glands of transgenic mice. Biochimie 2010; 93:628-30. [PMID: 21146579 DOI: 10.1016/j.biochi.2010.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Accepted: 12/01/2010] [Indexed: 11/22/2022]
Abstract
A system for production of single-chain antibody in mammary glands of mice was developed on the basis of a hybrid gene constructed from the coding sequence of anti-Her2/neu single-chain antibody inserted into the first exon of the sheep beta-lactoglobulin gene. Lines of transgenic mice were obtained that expressed humanized single-chain anti-Her2/neu IgG1-like antibody in their milk. These antibodies interact with Her2/neu antigen with high affinity (K(d) = 0.4 nM). The expression level of the transgene depended on its integration site in the genome but not on the copy number. The transgene had no toxic effect on the mice and was stably inherited, at least for two generations. The results reveal new opportunities of producing single-chain antibodies in the milk of animals.
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Wei J, Yang X, Zheng M, Wang M, Dai Y, Chen Z, Li N. The recombinant chimeric antibody chHAb18 against hepatocellular carcinoma can be produced in milk of transgenic mice. Transgenic Res 2010; 20:321-30. [DOI: 10.1007/s11248-010-9408-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Accepted: 05/21/2010] [Indexed: 12/22/2022]
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