1
|
Sun Q, Song SY, Ma J, Li D, Wang Y, Yang Z, Wang Y. Cutting edge of genetically modified pigs targeting complement activation for xenotransplantation. Front Immunol 2024; 15:1383936. [PMID: 38638432 PMCID: PMC11024274 DOI: 10.3389/fimmu.2024.1383936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 03/15/2024] [Indexed: 04/20/2024] Open
Abstract
In the quest to address the critical shortage of donor organs for transplantation, xenotransplantation stands out as a promising solution, offering a more abundant supply of donor organs. Yet, its widespread clinical adoption remains hindered by significant challenges, chief among them being immunological rejection. Central to this issue is the role of the complement system, an essential component of innate immunity that frequently triggers acute and chronic rejection through hyperacute immune responses. Such responses can rapidly lead to transplant embolism, compromising the function of the transplanted organ and ultimately causing graft failure. This review delves into three key areas of xenotransplantation research. It begins by examining the mechanisms through which xenotransplantation activates both the classical and alternative complement pathways. It then assesses the current landscape of xenotransplantation from donor pigs, with a particular emphasis on the innovative strides made in genetically engineering pigs to evade complement system activation. These modifications are critical in mitigating the discordance between pig endogenous retroviruses and human immune molecules. Additionally, the review discusses pharmacological interventions designed to support transplantation. By exploring the intricate relationship between the complement system and xenotransplantation, this retrospective analysis not only underscores the scientific and clinical importance of this field but also sheds light on the potential pathways to overcoming one of the major barriers to the success of xenografts. As such, the insights offered here hold significant promise for advancing xenotransplantation from a research concept to a viable clinical reality.
Collapse
Affiliation(s)
- Qin Sun
- Department of Endocrinology, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Si-Yuan Song
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, United States
| | - Jiabao Ma
- School of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Danni Li
- Department of Pharmacy, Longquanyi District of Chengdu Maternity & Child Health Care Hospital, Chengdu, China
| | - Yiping Wang
- Department of Critical Care Medicine, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Zhengteng Yang
- School of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Yi Wang
- Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Center of Organ Transplantation, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, Sichuan, China
| |
Collapse
|
2
|
Choi KH, Lee DK, Oh JN, Son HY, Lee CK. FGF2 Signaling Plays an Important Role in Maintaining Pluripotent State of Pig Embryonic Germ Cells. Cell Reprogram 2018; 20:301-311. [PMID: 30204498 DOI: 10.1089/cell.2018.0019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Germ cells are alternative sources for deriving pluripotent stem cells. Because embryonic germ cells (EGCs) possess physiological and developmental features similar to those of embryonic stem cells, pig EGCs are considered a potential tool for generating transgenic animals for agricultural usage. Therefore, in this study, we attempted to establish and characterize pig EGCs from fetal gonads. EGC lines were derived from the genital ridges of porcine fetuses in media containing leukemia inhibitory factor (LIF), fibroblast growth factor 2 (FGF2), and stem cell factor. After establishment, these cells were cultured and stabilized in LIF- or FGF2-containing media. The cell lines were maintained under both conditions over an extended time period and spontaneously differentiated into the three germ layers in vitro. Interestingly, expression of pluripotency markers showed different patterns between cell lines cultured in LIF or FGF2. SSEA4 was only expressed in FGF2-treated pig EGCs (FGF2-pEGCs), not LIF-treated pig EGCs (LIF-pEGCs). Pluripotency genes were upregulated in FGF2-pEGCs, and germline markers were highly expressed, indicating that FGF2 supplements are more efficient in supporting the pluripotency of pEGCs. In conclusion, we verified that FGF2 signaling plays an important role in reprogramming and maintaining pEGCs from fetal gonads.
Collapse
Affiliation(s)
- Kwang-Hwan Choi
- 1 Animal Biotechnology Major, Department of Agricultural Biotechnology, Research Institute of Agriculture and Life Science, Seoul National University , Seoul, Korea
| | - Dong-Kyung Lee
- 1 Animal Biotechnology Major, Department of Agricultural Biotechnology, Research Institute of Agriculture and Life Science, Seoul National University , Seoul, Korea
| | - Jong-Nam Oh
- 1 Animal Biotechnology Major, Department of Agricultural Biotechnology, Research Institute of Agriculture and Life Science, Seoul National University , Seoul, Korea
| | - Hye-Young Son
- 2 Severance Biomedical Science Institute, Severance Hospital, Yonsei University College of Medicine , Seoul, Korea
| | - Chang-Kyu Lee
- 1 Animal Biotechnology Major, Department of Agricultural Biotechnology, Research Institute of Agriculture and Life Science, Seoul National University , Seoul, Korea.,3 Institute of Green Bio Science and Technology, Seoul National University , Pyeong Chang, Kangwon do, Korea
| |
Collapse
|
3
|
Evaluation of porcine stem cell competence for somatic cell nuclear transfer and production of cloned animals. Anim Reprod Sci 2017; 178:40-49. [PMID: 28126267 DOI: 10.1016/j.anireprosci.2017.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 01/11/2017] [Accepted: 01/15/2017] [Indexed: 12/31/2022]
Abstract
Porcine somatic cell nuclear transfer (SCNT) has been used extensively to create genetically modified pigs, but the efficiency of the methodology is still low. It has been hypothesized that pluripotent or multipotent stem cells might result in increased SCNT efficacy as these cells are closer than somatic cells to the epigenetic state found in the blastomeres and therefore need less reprogramming. Our group has worked with porcine SCNT during the last 20 years and here we describe our experience with SCNT of 3 different stem cell lines. The porcine stem cells used were: Induced pluripotent stem cells (iPSCs) created by lentiviral doxycycline-dependent reprogramming and cultered with a GSK3β- and MEK-inhibitor (2i) and leukemia inhibitor factor (LIF) (2i LIF DOX-iPSCs), iPSCs created by a plasmid-based reprogramming and cultured with 2i and fibroblast growth factor (FGF) (2i FGF Pl-iPSCs) and embryonic germ cells (EGCs), which have earlier been characterized as being multipotent. The SCNT efficiencies of these stem cell lines were compared with that of the two fibroblast cell lines from which the iPSC lines were derived. The blastocyst rates for the 2i LIF DOX-iPSCs were 14.7%, for the 2i FGF Pl-iPSC 10.1%, and for the EGCs 34.5% compared with the fibroblast lines yielding 36.7% and 25.2%. The fibroblast- and EGC-derived embryos were used for embryo transfer and produced live offspring at similar low rates of efficiency (3.2 and 4.0%, respectively) and with several instances of malformations. In conclusion, potentially pluripotent porcine stem cells resulted in lower rates of embryonic development upon SCNT than multipotent stem cells and differentiated somatic cells.
Collapse
|
4
|
Abstract
In the past few years, new technologies have arisen that enable higher efficiency of gene editing. With the increase ease of using gene editing technologies, it is important to consider the best method for transferring new genetic material to livestock animals. Microinjection is a technique that has proven to be effective in mice but is less efficient in large livestock animals. Over the years, a variety of methods have been used for cloning as well as gene transfer including; nuclear transfer, sperm mediated gene transfer (SMGT), and liposome-mediated DNA transfer. This review looks at the different success rate of these methods and how they have evolved to become more efficient. As well as gene editing technologies, including Zinc-finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and the most recent clustered regulatory interspaced short palindromic repeats (CRISPRs). Through the advancements in gene-editing technologies, generating transgenic animals is now more accessible and affordable. The goals of producing transgenic animals are to 1) increase our understanding of biology and biomedical science; 2) increase our ability to produce more efficient animals; and 3) produce disease resistant animals. ZFNs, TALENs, and CRISPRs combined with gene transfer methods increase the possibility of achieving these goals.
Collapse
Key Words
- BLG, β-lactoglobulin
- CRISPR
- CRISPRs, clustered regulatory interspaced short palindromic repeats
- EG, embryonic germ
- ES, Embryonic stem
- ESC, Embryonic stem cell
- HDR, homology directed repair
- ICM, inner cell mass
- ICSI, intracytoplasmic sperm injection
- NHEJ, non-homologous end joining
- NT, nuclear transfers
- OBCT, oocyte bisection technique
- PAM, protospacer adjacent motif
- PCR, polymerase chain reaction
- PGCS, primordial germ cells
- RVDs, repeat variable diresidues
- SMGT
- SMGT, sperm mediated gene transfer
- SV40, simian virus 40
- TALEN
- TALENs, transcription activator-like effector nucleases
- ZFN
- ZFN, Zinc-finger nucleases
- gene editing
- gene transfer
- iPSC, induced pluripotent stem cells
- nuclear transfer
- ssODN, single strand oligo nucleotide
Collapse
Affiliation(s)
- Samantha N Lotti
- a Department of Animal Sciences , University of Illinois at Urbana-Champaign , Urbana , Illinois , USA
| | - Kathryn M Polkoff
- a Department of Animal Sciences , University of Illinois at Urbana-Champaign , Urbana , Illinois , USA
| | - Marcello Rubessa
- b Carl R. Woese Institute for Genomic Biology, University of Illinois , Urbana , IL , USA
| | - Matthew B Wheeler
- a Department of Animal Sciences , University of Illinois at Urbana-Champaign , Urbana , Illinois , USA.,b Carl R. Woese Institute for Genomic Biology, University of Illinois , Urbana , IL , USA
| |
Collapse
|
5
|
Walters EM, Wolf E, Whyte JJ, Mao J, Renner S, Nagashima H, Kobayashi E, Zhao J, Wells KD, Critser JK, Riley LK, Prather RS. Completion of the swine genome will simplify the production of swine as a large animal biomedical model. BMC Med Genomics 2012; 5:55. [PMID: 23151353 PMCID: PMC3499190 DOI: 10.1186/1755-8794-5-55] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 10/28/2011] [Indexed: 12/25/2022] Open
Abstract
Background Anatomic and physiological similarities to the human make swine an excellent large animal model for human health and disease. Methods Cloning from a modified somatic cell, which can be determined in cells prior to making the animal, is the only method available for the production of targeted modifications in swine. Results Since some strains of swine are similar in size to humans, technologies that have been developed for swine can be readily adapted to humans and vice versa. Here the importance of swine as a biomedical model, current technologies to produce genetically enhanced swine, current biomedical models, and how the completion of the swine genome will promote swine as a biomedical model are discussed. Conclusions The completion of the swine genome will enhance the continued use and development of swine as models of human health, syndromes and conditions.
Collapse
Affiliation(s)
- Eric M Walters
- National Swine Resource and Research Center, University of Missouri, Columbia, MO 65211, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Generation of human lactoferrin transgenic cloned goats using donor cells with dual markers and a modified selection procedure. Theriogenology 2012; 78:1303-11. [PMID: 22898014 DOI: 10.1016/j.theriogenology.2012.05.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Revised: 05/25/2012] [Accepted: 05/25/2012] [Indexed: 01/12/2023]
Abstract
The objective was to use dual markers to accurately select genetically modified donor cells and ensure that the resulting somatic cell nuclear transfer kids born were transgenic. Fetal fibroblast cells were transfected with dual marking gene vector (pCNLF-ng) that contained the red-shifted variant of the jellyfish green fluorescent protein (LGFP) and neomycin resistance (Neo) markers. Cell clones that were G418-resistant and polymerase chain reaction-positive were subcultured for several passages; individual cells of the clones were examined with fluorescence microscopy to confirm transgenic integration. Clones in which every cell had bright green fluorescence were used as donor cells for nuclear transfer. In total, 86.7% (26/30) cell clones were confirmed to have transgenic integration of the markers by polymerase chain reaction, 76.7% (23/30) exhibited fluorescence, but only 40% (12/30) of these fluorescent cell clones had fluorescence in all cell populations. Moreover, through several cell passages, only 20% (6/30) of the cell clones exhibited stable LGFP expression. Seven transgenic cloned offspring were produced from these cells by nuclear transfer. Overall, the reconstructed embryo fusion rate was 76.6%, pregnancy rates at 35 and 60 days were 39.1% and 21.7%, respectively, and the offspring birth rate was 1.4%. There were no significant differences between nuclear transfer with dual versus a single (Neo) marker (overall, 73.8% embryo fusion rate, 53.8% and 26.9% pregnancy rates, and 1.9% birth rate with five offspring). In conclusion, the use of LGFP/Neo dual markers and an optimized selection procedure reliably screened genetically modified donor cells, excluded pseudotransgenic cells, and led to production of human lactoferrin transgenic goats. Furthermore, the LGFP/Neo markers had no adverse effects on the efficiency of somatic cell nuclear transfer.
Collapse
|
7
|
Luo Y, Lin L, Bolund L, Jensen TG, Sørensen CB. Genetically modified pigs for biomedical research. J Inherit Metab Dis 2012; 35:695-713. [PMID: 22453682 DOI: 10.1007/s10545-012-9475-0] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 02/09/2012] [Accepted: 03/02/2012] [Indexed: 01/17/2023]
Abstract
During the last two decades, pigs have been used to develop some of the most important large animal models for biomedical research. Advances in pig genome research, genetic modification (GM) of primary pig cells and pig cloning by nuclear transfer, have facilitated the generation of GM pigs for xenotransplantation and various human diseases. This review summarizes the key technologies used for generating GM pigs, including pronuclear microinjection, sperm-mediated gene transfer, somatic cell nuclear transfer by traditional cloning, and somatic cell nuclear transfer by handmade cloning. Broadly used genetic engineering tools for porcine cells are also discussed. We also summarize the GM pig models that have been generated for xenotransplantation and human disease processes, including neurodegenerative diseases, cardiovascular diseases, eye diseases, bone diseases, cancers and epidermal skin diseases, diabetes mellitus, cystic fibrosis, and inherited metabolic diseases. Thus, this review provides an overview of the progress in GM pig research over the last two decades and perspectives for future development.
Collapse
Affiliation(s)
- Yonglun Luo
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark.
| | | | | | | | | |
Collapse
|
8
|
Schneider MKJ, Seebach JD. Xenotransplantation literature update June-October 2010. Xenotransplantation 2011; 17:481-8. [PMID: 21158949 DOI: 10.1111/j.1399-3089.2010.00615.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mårten K J Schneider
- Laboratory of Vascular Immunology, Division of Internal Medicine, University Hospital Zurich, Zurich, Switzerland.
| | | |
Collapse
|