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Yang S, Zhang M, Wei H, Zhang B, Peng J, Shang P, Sun S. Research prospects for kidney xenotransplantation: a bibliometric analysis. Ren Fail 2024; 46:2301681. [PMID: 38391160 PMCID: PMC10916899 DOI: 10.1080/0886022x.2023.2301681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/30/2023] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND Xenograft kidney transplantation has been receiving increasing attention. The purpose of this study is to use bibliometric analysis to identify papers in this research field and explore their current status and development trends. METHODS Using the data in the Web of Science core database from Clarivate Analytics as the object of study, we used 'TS = Kidney OR Renal AND xenotransplantation' as the search term to find all literature from 1980 to 2 November 2022. RESULTS In total, 1005 articles were included. The United States has the highest number of publications and has made significant contributions in this field. Harvard University was at the forefront of this study. Professor Cooper has published 114 articles in this field. Xenotransplantation has the largest number of relevant articles. Transplantation was the most cited journal. High-frequency keywords illustrated the current state of development and future trends in xenotransplantation. The use of transgenic pigs and the development of coordinated co-stimulatory blockers have greatly facilitated progress in xenotransplantation research. We found that 'co-stimulation blockade', 'xenograft survival', 'pluripotent stem cell', 'translational research', and 'genetic engineering' were likely to be the focus of attention in the coming years. CONCLUSIONS This study screened global publications related to xenogeneic kidney transplantation; analyzed their literature metrology characteristics; identified the most cited articles in the research field; understood the current situation, hot spots, and trends of global research; and provided future development directions for researchers and practitioners.
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Affiliation(s)
- Shujun Yang
- Department of Urology, Lanzhou University Second Hospital, Lanzhou, China
| | - Mingtao Zhang
- Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, China
| | - Hao Wei
- Department of Urology, Qingdao University Hospital, Qingdao, China
| | - Bin Zhang
- Department of Urology, Lanzhou University Second Hospital, Lanzhou, China
| | - Jiang Peng
- Department of Orthopaedics, Chinese PLA General Hospital, Chinese PLA Medical School, Beijing, China
| | - Panfeng Shang
- Department of Urology, Lanzhou University Second Hospital, Lanzhou, China
| | - Shengkun Sun
- Department of Urology, Chinese PLA General Hospital, Chinese PLA Medical School, Beijing, China
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2
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Pagotto VPF, Busnardo FDF, Raia SMA, Gemperli R. Advancements in xenotransplantation: paving the way for revolutionary developments in reconstructive plastic surgery. Acta Cir Bras 2024; 39:e393424. [PMID: 39016359 PMCID: PMC11249441 DOI: 10.1590/acb393424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 05/10/2024] [Indexed: 07/18/2024] Open
Affiliation(s)
| | - Fábio de Freitas Busnardo
- Universidade de São Paulo – Faculdade de Medicina – Hospital das Clínicas – São Paulo (SP), Brazil
- Instituto do Câncer do Estado de São Paulo – São Paulo (SP), Brazil
| | | | - Rolf Gemperli
- Universidade de São Paulo – Faculdade de Medicina – Hospital das Clínicas – São Paulo (SP), Brazil
- Academia Nacional de Medicina – Rio de Janeiro (RJ), Brazil
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3
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Thom J, Roters N, Schuemann S, Andrée B, Buettner FFR, Hilfiker A, Goecke T, Ramm R. Reduction in Xenogeneic Epitopes on Porcine Endothelial Cells by Periodate Oxidation. Biomedicines 2024; 12:1470. [PMID: 39062043 PMCID: PMC11275244 DOI: 10.3390/biomedicines12071470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/28/2024] [Accepted: 06/29/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND Patterns of humoral immune responses represent a major hurdle in terms of pig-to-human xenotransplantation approaches. The best-known xenogeneic glycan antigens present in pigs are the αGal (Galili antigen) and the non-human sialic acid Neu5Gc. As there are further differences between porcine and human cellular surface glycosylation, a much broader range of glycan epitopes with xeno-reactive relevance can be anticipated. Therefore, we set out to chemically modify porcine cellular surface glycans in a global approach by applying sodium periodate (NaIO4) oxidation. METHODS Porcine endothelial cells were exposed to oxidation with 1 to 5 mM NaIO4 for different time periods at 37 °C or 4 °C and under static or dynamic conditions. The impact on cellular survival was determined by applying live/dead assays. Oxidation of αGal-epitopes was assessed by fluorescence microscopy-based quantification of isolectin-B4 (IL-B4) staining. Overall immunogenicity of porcine cells was determined by human serum antibody binding. RESULTS Treatment of porcine endothelial cells and tissues with NaIO4 led to reduced binding of the αGal-specific IL-B4 and/or human serum antibodies. NaIO4 was revealed to be cytotoxic when performed at elevated temperatures and for a prolonged time. However, by applying 2 mM NaIO4 for 60 min at 4 °C, a high extent of cellular viability and a relevant reduction in detectable αGal epitope were observed. No differences were detected irrespectively on whether the cells were oxidized under static or flow conditions. CONCLUSIONS Glycan epitopes on living cells can be oxidized with NaIO4 while maintaining their viability. Accordingly, this strategy holds promise to prevent immune reactions mediated by preformed anti-glycan antibodies.
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Affiliation(s)
- Jonas Thom
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, 30625 Hannover, Germany
| | - Nathalie Roters
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, 30625 Hannover, Germany (T.G.)
| | - Slavica Schuemann
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, 30625 Hannover, Germany (T.G.)
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, 30625 Hannover, Germany
| | - Birgit Andrée
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, 30625 Hannover, Germany
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, 30625 Hannover, Germany
| | - Falk F. R. Buettner
- Institute of Clinical Biochemistry, Hannover Medical School, 30625 Hannover, Germany
- Proteomics, Institute of Theoretical Medicine, Faculty of Medicine, University of Augsburg, 86159 Augsburg, Germany
| | - Andres Hilfiker
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, 30625 Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, 30625 Hannover, Germany (T.G.)
| | - Tobias Goecke
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, 30625 Hannover, Germany (T.G.)
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, 30625 Hannover, Germany
- Biomedical Research in End Stage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (DZL), 30625 Hannover, Germany
| | - Robert Ramm
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, 30625 Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, 30625 Hannover, Germany (T.G.)
- Department of Cardiac-, Thoracic-, Transplantation and Vascular Surgery, Hannover Medical School, 30625 Hannover, Germany
- Biomedical Research in End Stage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (DZL), 30625 Hannover, Germany
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4
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Lee J, Boas FE, Duran-Struuck R, Gaba RC, Schachtschneider KM, Comin-Anduix B, Galic Z, Haile S, Bassir A, Chiang J. Pigs as Clinically Relevant Models for Synergizing Interventional Oncology and Immunotherapy. J Vasc Interv Radiol 2024; 35:809-817.e1. [PMID: 38219903 DOI: 10.1016/j.jvir.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 10/31/2023] [Accepted: 01/03/2024] [Indexed: 01/16/2024] Open
Abstract
Traditionally, rodent cancer models have driven preclinical oncology research. However, they do not fully recapitulate characteristics of human cancers, and their size poses challenges when evaluating tools in the interventional oncologists' armamentarium. Pig models, however, have been the gold standard for validating surgical procedures. Their size enables the study of image-guided interventions using human ultrasound (US), computed tomography (CT), and magnetic resonance (MR) imaging platforms. Furthermore, pigs have immunologic features that are similar to those of humans, which can potentially be leveraged for studying immunotherapy. Novel pig models of cancer are being developed, but additional research is required to better understand both the pig immune system and malignancy to enhance the potential for pig models in interventional oncology research. This review aims to address the main advantages and disadvantages of using a pig model for interventional oncology and outline the specific characteristics of pig models that make them more suitable for investigation of locoregional therapies.
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Affiliation(s)
- Justin Lee
- Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - F Edward Boas
- Department of Radiology, City of Hope, Duarte, California
| | - Raimon Duran-Struuck
- Department of Pathobiology, University of Pennsylvania School of Veterinary Medicine, Philadelphia, Pennsylvania
| | - Ron C Gaba
- Department of Radiology, University of Illinois Health, Chicago, Illinois
| | | | - Begonya Comin-Anduix
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Zoran Galic
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Salem Haile
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Ali Bassir
- Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Jason Chiang
- Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, California.
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5
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Wang Y, Hils M, Fischer A, Wölbing F, Biedermann T, Schnieke A, Fischer K. Gene-edited pigs: a translational model for human food allergy against alpha-Gal and anaphylaxis. Front Immunol 2024; 15:1358178. [PMID: 38469303 PMCID: PMC10925645 DOI: 10.3389/fimmu.2024.1358178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 02/06/2024] [Indexed: 03/13/2024] Open
Abstract
The prevalence of food allergy is rising and is estimated to approach 10%. Red meat allergy is the first known food allergy elicited by immunoglobulin E (IgE) antibodies recognizing a carbohydrate. Due to the loss of function of the alpha-1,3-galactosyltransferase (GGTA1) gene in humans, the disaccharide galactose-α-1,3-galactose (α-Gal) cannot be synthesized and therefore became immunogenic. IgE sensitization is elicited through the skin by repetitive tick bites transmitting α-Gal. The underlying mechanisms regarding innate and adaptive immune cell activation, including the B-cell isotype switch to IgE, are poorly understood, requiring further research and physiologically relevant animal models. Here, we describe a new animal model of red meat allergy using percutaneous α-Gal sensitization of gene-edited GGTA1-deficient pigs. Total and α-Gal-specific IgG, IgG1, IgG2, IgG4, and IgE levels were tracked. Further key factors associated with allergic skin inflammation, type 2 immunity, and allergy development were measured in PBMCs and skin samples. Significant increases in α-Gal-specific IgG1 and IgE levels indicated successful sensitization to the allergen α-Gal. Intracutaneous sensitizations with α-Gal recruited lymphocytes to the skin, including elevated numbers of T helper 2 (Th2) cells. Finally, α-Gal-sensitized pigs not only recognized α-Gal as non-self-antigen following α-Gal exposure through the skin but also developed anaphylaxis upon antigen challenge. Based on the similarities between the porcine and human skin, this new large animal model for α-Gal allergy should help to unveil the consecutive steps of cutaneous sensitization and aid the development of prophylactic and treatment interventions.
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Affiliation(s)
- Ying Wang
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Miriam Hils
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Andrea Fischer
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Florian Wölbing
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Tilo Biedermann
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, Munich, Germany
| | - Angelika Schnieke
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Konrad Fischer
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
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6
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Rodger D, Hurst DJ, Bobier CA, Symons X. Genetic disenhancement and xenotransplantation: diminishing pigs' capacity to experience suffering through genetic engineering. JOURNAL OF MEDICAL ETHICS 2024:jme-2023-109594. [PMID: 38395623 DOI: 10.1136/jme-2023-109594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 02/10/2024] [Indexed: 02/25/2024]
Abstract
One objection to xenotransplantation is that it will require the large-scale breeding, raising and killing of genetically modified pigs. The pigs will need to be raised in designated pathogen-free facilities and undergo a range of medical tests before having their organs removed and being euthanised. As a result, they will have significantly shortened life expectancies, will experience pain and suffering and be subject to a degree of social and environmental deprivation. To minimise the impact of these factors, we propose the following option for consideration-ethically defensible xenotransplantation should entail the use of genetic disenhancement if it becomes possible to do so and if that pain and suffering cannot be eliminated by other means. Despite not being a morally ideal 'solution', it is morally better to prevent unavoidable pain until a viable non-animal alternative becomes available.
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Affiliation(s)
- Daniel Rodger
- Institute of Health and Social Care, London South Bank University, London, UK
| | - Daniel J Hurst
- Department of Family Medicine, Rowan University School of Osteopathic Medicine, Stratford, New Jersey, USA
| | | | - Xavier Symons
- Institute for Quantitative Social Science, Harvard University, Cambridge, Massachusetts, USA
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7
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Andrade G, AboHamza E, Elsantil Y, Ayoub A, Bedewy D. Moral approval of xenotransplantation in Egypt: associations with religion, attitudes towards animals and demographic factors. BMC Med Ethics 2024; 25:19. [PMID: 38373945 PMCID: PMC10877808 DOI: 10.1186/s12910-024-01013-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 02/09/2024] [Indexed: 02/21/2024] Open
Abstract
Xenotransplantation has great potential as an alternative to alleviate the shortage of organs for donation. However, given that the animal most suited for xenotransplantation is the pig, there are concerns that people in Muslim countries may be more hesitant to morally approve of these procedures. In this study, the moral approval of xenotransplantation was assessed in a group of 895 participants in Egypt. The results showed that religiosity itself does not predict moral approval of xenotransplantation, but religious identity does, as Muslims are less likely to approve of xenotransplantation than Christians. However, the strongest predictor of moral approval of xenotransplantation was gender, with women displaying less approval. A partial mediating factor in this association was concern for animal welfare. Based on these results, some implications for public policy are discussed.
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Affiliation(s)
| | - Eid AboHamza
- Al Ain University, Al Ain, United Arab Emirates
- Tanta University, Tanta, Egypt
| | | | - AlaaEldin Ayoub
- Arabian Gulf University, Manama, Bahrain
- Aswan University, Aswan, Egypt
| | - Dalia Bedewy
- Ajman University, Ajman, United Arab Emirates.
- Tanta University, Tanta, Egypt.
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8
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Abstract
Xenotransplant patient selection recommendations restrict clinical trial participation to seriously ill patients for whom alternative therapies are unavailable or who will likely die while waiting for an allotransplant. Despite a scholarly consensus that this is advisable, we propose to examine this restriction. We offer three lines of criticism: (1) The risk-benefit calculation may well be unfavorable for seriously ill patients and society; (2) the guidelines conflict with criteria for equitable patient selection; and (3) the selection of seriously ill patients may compromise informed consent. We conclude by highlighting how the current guidance reveals a tension between the societal values of justice and beneficence.
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Affiliation(s)
- Christopher Bobier
- Department of Theology and Philosophy, Hendrickson Institute for Ethical Leadership, St. Mary's University of Minnesota, Winona, MN, USA
| | - Daniel Rodger
- Operating Department Practice, Institute of Health and Social Care, School of Allied and Community Health, London South Bank University, London, UK
- Department of Psychological Sciences, Birkbeck, University of London, London, UK
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9
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Tanveer Y, Arif A, Tsenteradze T, Anika NN, Bakht D, Masood QF, Affaf M, Batool W, Yadav I, Gasim RW, Mohamed Y, Abdelmonim Khogali Mohamed M, Ekhator C, Mohsin SN, Khan R. Revolutionizing Heart Transplantation: A Multidisciplinary Approach to Xenotransplantation, Immunosuppression, Regenerative Medicine, Artificial Intelligence, and Economic Sustainability. Cureus 2023; 15:e46176. [PMID: 37908951 PMCID: PMC10613786 DOI: 10.7759/cureus.46176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2023] [Indexed: 11/02/2023] Open
Abstract
Heart transplantation (HTx) stands as a life-saving intervention for patients with end-stage heart disease, but the field is fraught with numerous challenges that span from the scarcity of donor organs to long-term complications arising from immunosuppressive therapies. This comprehensive review article offers an in-depth exploration of the multifaceted aspects of HTx. The review covers groundbreaking advancements in xenotransplantation, enabled by cutting-edge genetic engineering techniques, and the promising role of stem cell therapies, particularly porcine mesenchymal stem cells, in cardiac regeneration. It also delves into the evolution and limitations of immunosuppressive therapies and the revolutionary potential of artificial intelligence (AI) and machine learning (ML) in enhancing donor-recipient matching and predicting patient outcomes. Economic considerations, especially in the context of rising healthcare costs, are examined to assess the sustainability of these advancements. The article further discusses the significant improvements in patient outcomes over the years, while highlighting persisting challenges, such as graft failure, rejection, and infection. It underscores the importance of experience and specialized training, evidenced by the presence of an institutional learning curve. The review concludes by advocating for a multifaceted, collaborative approach involving clinicians, researchers, and policymakers to overcome existing challenges. Through coordinated efforts that consider medical, ethical, and economic factors, the field of HTx is poised for further evolution, offering renewed hope for improved patient care and outcomes.
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Affiliation(s)
| | - Aleena Arif
- Internal Medicine, Allama Iqbal Medical College, Lahore, PAK
| | - Tamar Tsenteradze
- General Surgery, Cardiology, and Internal Medicine, Tbilisi State Medical University, Tbilisi, GEO
| | - Nabila N Anika
- Surgery, Baylor College of Medicine, Houston, USA
- Internal Medicine, Holy Family Red Crescent Medical College and Hospital, Dhaka, BGD
| | - Danyal Bakht
- Medicine and Surgery, Mayo Hospital, Lahore, PAK
| | | | - Maryam Affaf
- Internal Medicine, Women Medical and Dental College, Abbottabad, PAK
| | - Wajiha Batool
- Internal Medicine, Army Medical College, Rawalpindi, PAK
| | - Indresh Yadav
- Internal Medicine, Samar Hospital and Research Center Pvt. Ltd., Janakpur, NPL
- Internal Medicine, Community Based Medical College Bangladesh, Mymensingh, BGD
| | - Rayan W Gasim
- Internal Medicine, University of Khartoum, Khartoum, SDN
| | - Youssef Mohamed
- Intensive Care Unit, Ibrahim Malik Teaching Hospital, Khartoum, SDN
| | | | - Chukwuyem Ekhator
- Neuro-Oncology, New York Institute of Technology, College of Osteopathic Medicine, New York, USA
| | - Syed Naveed Mohsin
- Orthopedics, St. James's Hospital, Dublin, IRL
- General Surgery, Cavan General Hospital, Cavan, IRL
| | - Rehman Khan
- Internal Medicine, Mayo Hospital, Lahore, PAK
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10
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Flecks M, Fischer N, Krijnse Locker J, Tönjes RR, Godehardt AW. Analysis of PERV-C superinfection resistance using HA-tagged viruses. Retrovirology 2023; 20:14. [PMID: 37605152 PMCID: PMC10440901 DOI: 10.1186/s12977-023-00630-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 08/09/2023] [Indexed: 08/23/2023] Open
Abstract
BACKGROUND Using pigs as organ donors has advanced xenotransplantation to the point that it is almost ready for clinical use. However, there is still a zoonotic risk associated with xenotransplantation, and the potential transmission of porcine endogenous retroviruses needs to be surveyed. Despite significant attempts to eliminate this risk, by the selection of PERV-C free pigs with low expression of PERV-A, -B, and by the genome-wide inactivation of PERV using CRISPR/Cas9, the impact of superinfection resistance (SIR) was not investigated. SIR is a viral trait that prevents reinfection (superinfection). For PERV, the underlying mechanism is unclear, whether and how cells, that harbor functional PERV, are protected. Using PERV-C(5683) as a reference virus, we investigated SIR in a newly developed in vitro model to pursue the mechanism and confirm its protective effect. RESULTS We developed three PERV-C constructs on the basis of PERV-C(5683), each of which carries a hemagglutinin tag (HA-tag) at a different position of the envelope gene (SP-HA, HA-VRA, and RPep-HA), to distinguish between primary infection and superinfection. The newly generated PERV-C(5683)-HA viruses were characterized while quantifying the viral RNA, reverse transcriptase activity, protein expression analysis, and infection studies. It was demonstrated that SP-HA and RPep-HA were comparable to PERV-C(5683), whereas HA-VRA was not replication competent. SP-HA and RPep-HA were chosen to challenge PERV-C(5683)-positive ST-IOWA cells demonstrating that PERV-C-HA viruses are not able to superinfect those cells. They do not integrate into the genome and are not expressed. CONCLUSIONS The mechanism of SIR applies to PERV-C. The production of PERV-C particles serves as a defense mechanism from superinfection with exogenous PERV-C. It was demonstrated by newly generated PERV-C(5683)-HA clones that might be used as a cutting-edge tool. The HA-tagging of PERV-C is novel, providing a blueprint for the tagging of other human tropic PERV viruses. The tagged viruses are suitable for additional in vitro and in vivo infection studies and will contribute, to basic research on viral invasion and pathogenesis. It will maintain the virus safety of XTx.
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Affiliation(s)
- Merle Flecks
- Division of Haematology, Cell and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | - Nicole Fischer
- Division of Haematology, Cell and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | - Jacomina Krijnse Locker
- Loewe-DRUID Research Group, Electron Microscopy of Pathogens, Paul-Ehrlich-Institut, Langen, Germany
| | - Ralf R. Tönjes
- Division of Haematology, Cell and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
| | - Antonia W. Godehardt
- Division of Haematology, Cell and Gene Therapy, Paul-Ehrlich-Institut, Langen, Germany
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Wang X, Shakeel A, Salih AE, Vurivi H, Daoud S, Desidery L, Khan RL, Shibru MG, Ali ZM, Butt H, Chan V, Corridon PR. A scalable corneal xenograft platform: simultaneous opportunities for tissue engineering and circular economic sustainability by repurposing slaughterhouse waste. Front Bioeng Biotechnol 2023; 11:1133122. [PMID: 37180037 PMCID: PMC10168539 DOI: 10.3389/fbioe.2023.1133122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/17/2023] [Indexed: 05/15/2023] Open
Abstract
Introduction: Corneal disease is a leading cause of blindness globally that stems from various etiologies. High-throughput platforms that can generate substantial quantities of corneal grafts will be invaluable in addressing the existing global demand for keratoplasty. Slaughterhouses generate substantial quantities of underutilized biological waste that can be repurposed to reduce current environmentally unfriendly practices. Such efforts to support sustainability can simultaneously drive the development of bioartificial keratoprostheses. Methods: Scores of discarded eyes from the prominent Arabian sheep breeds in our surrounding region of the United Arab Emirates (UAE) were repurposed to generate native and acellular corneal keratoprostheses. Acellular corneal scaffolds were created using a whole-eye immersion/agitation-based decellularization technique with a widely available, eco-friendly, and inexpensive 4% zwitterionic biosurfactant solution (Ecover, Malle, Belgium). Conventional approaches like DNA quantification, ECM fibril organization, scaffold dimensions, ocular transparency and transmittance, surface tension measurements, and Fourier-transform infrared (FTIR) spectroscopy were used to examine corneal scaffold composition. Results: Using this high-throughput system, we effectively removed over 95% of the native DNA from native corneas while retaining the innate microarchitecture that supported substantial light transmission (over 70%) after reversing opacity, a well-established hallmark of decellularization and long-term native corneal storage, with glycerol. FTIR data revealed the absence of spectral peaks in the frequency range 2849 cm-1 to 3075 cm-1, indicating the effective removal of the residual biosurfactant post-decellularization. Surface tension studies confirmed the FTIR data by capturing the surfactant's progressive and effectual removal through tension measurements ranging from approximately 35 mN/m for the 4% decellularizing agent to 70 mN/m for elutes highlighting the effective removal of the detergent. Discussion: To our knowledge, this is the first dataset to be generated outlining a platform that can produce dozens of ovine acellular corneal scaffolds that effectively preserve ocular transparency, transmittance, and ECM components using an eco-friendly surfactant. Analogously, decellularization technologies can support corneal regeneration with attributes comparable to native xenografts. Thus, this study presents a simplified, inexpensive, and scalable high-throughput corneal xenograft platform to support tissue engineering, regenerative medicine, and circular economic sustainability.
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Affiliation(s)
- Xinyu Wang
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Adeeba Shakeel
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Ahmed E. Salih
- Department of Mechanical Engineering, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Hema Vurivi
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Sayel Daoud
- Anatomical Pathology Laboratory, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Luca Desidery
- Department of Civil Infrastructure and Environmental Engineering, College of Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Raheema L. Khan
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Meklit G. Shibru
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Zehara M. Ali
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Haider Butt
- Department of Mechanical Engineering, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Vincent Chan
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Peter R. Corridon
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
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Bobier C, Rodger D, Hurst DJ, Omelianchuk A. In defense of xenotransplantation research: Because of, not in spite of, animal welfare concerns. Xenotransplantation 2023; 30:e12791. [PMID: 36573621 DOI: 10.1111/xen.12791] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/11/2022] [Accepted: 12/12/2022] [Indexed: 12/28/2022]
Abstract
It is envisioned that one day xenotransplantation will bring about a future where transplantable organs can be safely and efficiently grown in transgenic pigs to help meet the global organ shortage. While recent advances have brought this future closer, worries remain about whether it will be beneficial overall. The unique challenges and risks posed to humans that arise from transplanting across the species barrier, in addition to the costs borne by non-human animals, has led some to question the value of xenotransplantation altogether. In response, we defend the value of xenotransplantation research, because it can satisfy stringent welfare conditions on the permissibility of animal research and use. Along the way, we respond to the alleged concerns, and conclude that they do not currently warrant a cessation or a curtailing of xenotransplantation research.
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Affiliation(s)
- Christopher Bobier
- Department of Theology and Philosophy, Hendrickson Institute for Ethical Leadership, St. Mary's University of Minnesota, Winona, Minnesota, USA
| | - Daniel Rodger
- Operating Department Practice, Institute of Health and Social Care, School of Allied and Community Health, London South Bank University, London, UK.,Department of Psychological Sciences, Birkbeck, University of London, London, UK
| | - Daniel J Hurst
- Department of Family Medicine Rowan University School of Osteopathic Medicine Stratford, New Jersey, USA
| | - Adam Omelianchuk
- The Center for Medical Ethics and Health Policy at Baylor College of Medicine, Houston, Texas, USA
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Niemann H. Xenotransplantate vom Schwein – ist das Ende des Organmangels
in Sicht? TRANSFUSIONSMEDIZIN 2022. [DOI: 10.1055/a-1814-8440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
ZusammenfassungUnter „Xenotransplantation“ wird die Übertragung von
funktionsfähigen Zellen, Geweben oder Organen zwischen verschiedenen
Spezies verstanden, insbesondere von Schweinen auf den Menschen. In den meisten
Industrieländern klafft eine große Lücke zwischen der
Anzahl geeigneter Spenderorgane und der Anzahl benötigter Transplantate.
Weltweit können nur etwa 10% des Organbedarfs durch Spenden
gedeckt werden. Eine erfolgreiche Xenotransplantation könnte diesen
Mangel mildern oder sogar weitgehend vermeiden. Das Schwein wird aus
verschiedenen Erwägungen heraus als am besten geeignete Spenderspezies
angesehen. Bei einer Übertragung porziner Organe auf Primaten treten
verschiedene immunologisch bedingte Abstoßungsreaktionen auf, die das
übertragene Organ innerhalb kurzer Zeit zerstören
können, wie die HAR (hyperakute Abstoßung), die AVR (akute
vaskuläre Abstoßung) und die spätere zelluläre
Abstoßung. Diese Abstoßungsreaktionen müssen durch
genetische Modifikationen im Schwein und eine geeignete immunsuppressive
Behandlung des Empfängers kontrolliert werden. Dazu müssen Tiere
mit mehrfachen genetischen Veränderungen produziert und im Hinblick auf
ihre Eignung für eine erfolgreiche Xenotransplantation geprüft
werden. Inzwischen können die HAR und auch die AVR durch Knockouts von
antigenen Oberflächenepitopen (z. B. αGal
[Galaktose-α1,3-Galaktose]) und transgene Expression humaner Gene mit
antiinflammatorischer, antiapoptotischer oder antikoagulativer Wirkung
zuverlässig kontrolliert werden. Nach orthotopen Transplantationen in
nicht humane Primaten konnten inzwischen mit Schweineherzen
Überlebensraten von bis zu 264 Tagen und mit porzinen Nieren von 435
Tagen erzielt werden. Eine Übertragung pathogener Erreger auf den
Empfänger kann bei Einhaltung einschlägiger
Hygienemaßnahmen ausgeschlossen werden. PERV (porzine endogene
Retroviren) können durch RNA-(Ribonukleinsäure-)Interferenz oder
Gen-Knockout ausgeschaltet werden. Sie stellen damit kein
Übertragungsrisiko für den Empfänger mehr dar. Anfang
2022 wurde in Baltimore (USA) ein Schweineherz mit 10 genetischen Modifikationen
auf einen Patienten mit schwerem Herzleiden übertragen, mit dem der
Empfänger 2 Monate offenbar ohne größere Probleme lebte.
Es wird erwartet, dass Xenotransplantate vom Schwein in absehbarer Zeit zur
klinischen Anwendungsreife kommen werden. Dazu werden klinische Versuche zur
systematischen Erfassung aller Auswirkungen solcher Transplantate auf den
Patienten sowie geeignete rechtliche und finanzielle Rahmenbedingungen
benötigt.
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Loike JD, Flaum RT. CRISPR Technology: A Jewish Legal Perspective. Rambam Maimonides Med J 2022; 13:RMMJ.10487. [PMID: 36394501 PMCID: PMC9622389 DOI: 10.5041/rmmj.10487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR) gene editing is an innovative and potentially game-changing biotechnology that can potentially reverse DNA mutations in a tissue-specific manner. In addition, CRISPR is being targeted for xenotransplantation, for increasing human longevity, in animal breeding, and in plant science. However, there are many ethical challenges that emerge from CRISPR technology. This article discusses several positions that relate to these ethical challenges from a Jewish legal perspective. In addition, we present several other applications of CRISPR technology that lack a defined Jewish legal precedent and require rabbinical scholars to address and resolve them in the future.
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Affiliation(s)
- John D. Loike
- Interim Director of Bioethics, School of Health Sciences and Practice, New York Medical College—Associated with Touro University, Valhalla, NY, USA
- Professor of Biology, Touro University, New York, NY, USA
- To whom correspondence should be addressed. E-mail:
| | - Rabbi Tzvi Flaum
- Associate Professor, Judaic Studies, Mashgiach Ruchani, Lander College for Women (Touro College), New York, NY, USA
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