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Hruby J, Spunda R, Mericka P, Mlcek M, Pecha O, Splith K, Schmelzle M, Krenzien F, Lindner J, Spacek M, Matia I. Influence of the new standardized clinical cryopreservation/slow thawing protocol on immunogenicity of arterial allografts in rats. PLoS One 2020; 15:e0230234. [PMID: 32155226 PMCID: PMC7064217 DOI: 10.1371/journal.pone.0230234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/25/2020] [Indexed: 12/01/2022] Open
Abstract
Objectives and design At the present time there are two waiting list for patients with vascular prosthetic infection indicated for arterial transplantation in the Czech Republic. The inclusion of each patient for cold-stored or cryopreserved arterial transplantation is the preference of indicating surgeon. In this experimental work we studied the immunogenicity of rat aortal allografts treated by our new clinical cryopreservation/slow thawing protocol. Material and methods Brown-Norway (BN) (N = 6, 203–217 g) or Lewis (LEW) (N = 6, 248–254 g) abdominal aortal grafts treated in accordance with our new clinical cryopreservation/slow thawing protocol were orthotopically transplanted to Lewis recipients (N = 12, 191–245 g). Aortal wall histology and infiltration by recipient immune cells, as well as donor specific anti MHC class I and II antibodies in recipient serum were studied in both isografts and allografts on day 30 postransplant. Core data of cryopreserved allografts were compared to our previous data of cold-stored aortal allografts treated in accordance with our clinical cold-storage protocol. Results Cryopreserved allografts showed regular morphology of aortal wall with clear differentiation of all three basic anatomical layers on day 30 postransplant. Intimal layer showed no hyperplasia, luminal surface was covered by endothelial cells. No statistical difference was observed in tunica media thickness between isografts and allografts. The medial layer showed no necrosis, shrinkage or immunoglobuline G deposition in any experimental group. The adventitial infiltration by immune cells was significantly higher (P<0.05) in allografts. Cryopreserved allografts showed significant lower activation of both cell- and antibody mediated immunity compared to historical data of cold-stored allografts. Conclusion Aortal wall histology of rat allografts treated by our new standardized clinical cryopreservation/slow thawing protocol was comparable to that of the cryopreserved isografts on day 30 posttranspant. The immunogenicity of cryopreserved aortal allografts was significantly lower compared to that of cold-stored aortal allografts.
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Affiliation(s)
- Jan Hruby
- 2nd Department of Surgery–Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - Rudolf Spunda
- 2nd Department of Surgery–Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - Pavel Mericka
- Tissue Bank, Faculty Hospital Hradec Kralove, Charles University- Faculty of Medicine in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Mikulas Mlcek
- Institute of Physiology, First Faculty of Medicine, Charles University in Prague
| | - Ondrej Pecha
- Technology Centre of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Katrin Splith
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Translational Centre for Regenerative Medicine, University of Leipzig, Leipzig, Germany
| | - Moritz Schmelzle
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Translational Centre for Regenerative Medicine, University of Leipzig, Leipzig, Germany
| | - Felix Krenzien
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Translational Centre for Regenerative Medicine, University of Leipzig, Leipzig, Germany
| | - Jaroslav Lindner
- 2nd Department of Surgery–Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - Miroslav Spacek
- 2nd Department of Surgery–Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - Ivan Matia
- Department of Cardio-Vascular Surgery, Nord Hospital and Karl Landsteiner Institute for Cardio-Vascular Research, Vienna, Austria
- Teaching Center, Medizinische Universität Wien, Vienna, Austria
- * E-mail:
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Špaček M, Měřička P, Janoušek L, Dalecká M, Benda A, Krs O, Slížová D, Špunda R, Hrubý J, Matia I, Honegrová B, Lindner J. Comparison of Different Thawing Protocols in Human Cryopreserved Venous Grafts. Ann Vasc Surg 2019; 64:347-354. [PMID: 31743787 DOI: 10.1016/j.avsg.2019.11.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/12/2019] [Accepted: 11/12/2019] [Indexed: 11/25/2022]
Abstract
BACKGROUND The aim of our study was to assess the impact of different thawing protocols on morphological changes arising in cryopreserved human saphenous vein grafts. METHODS The study was performed in 12 saphenous vein grafts harvested in brain death donors. Storage in the vapor phase of liquid nitrogen for 3 or 5 years followed. Two thawing protocols were tested: slow thawing in a refrigerator at temperature +4°C for 2 hr and rapid thawing-in a water bath at +37°C. Grafts were processed for scanning electron microscopy. Comparisons of continuous parameters under study between experimental groups were performed using the t-test (age, cold ischemia time, exposure to cryoprotectant, time of storage, total thawing time, mean thawing rate, morphology scoring of thawed HSVG) and the median test (HSVG length). Categorical parameters (sex and blood group) were formally tested using the chi-square test. RESULTS All samples were evaluated according to morphological changes and scored in terms of morphologically intact endothelium, confluent endothelium with structural inhomogeneity, disruption of the intercellular contacts, separation of the endothelial cells, complete loss of the endothelium, and damage of the subendothelial layers. There is no statistically significant difference between the sample sets at the significance level of 0.05. There was no association with donors' age, sex, and time of storage. CONCLUSIONS Human cryopreserved saphenous vein grafts in our experimental work showed no difference in terms of structural deterioration of the endothelial surface and basal membrane depending on different thawing protocols used.
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Affiliation(s)
- Miroslav Špaček
- 2nd Department of Surgery-Department of Cardiovascular Surgery, 1st Medical Faculty, Charles University and General University Hospital, Prague, Czech Republic.
| | - Pavel Měřička
- Tissue Bank University Hospital Hradec, Hradec Králové, Czech Republic
| | - Libor Janoušek
- Department of Transplantation Surgery, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Markéta Dalecká
- Imaging Methods Core Facility at BIOCEV, Faculty of Science, Charles University in Prague, Kralove, Czech Republic
| | - Aleš Benda
- Imaging Methods Core Facility at BIOCEV, Faculty of Science, Charles University in Prague, Kralove, Czech Republic
| | - Otakar Krs
- Department of Anatomy, Faculty of Medicine in Hradec Králové, Charles University in Prague, Hradec Králové, Czech Republic
| | - Dáša Slížová
- Department of Anatomy, Faculty of Medicine in Hradec Králové, Charles University in Prague, Hradec Králové, Czech Republic
| | - Rudolf Špunda
- 2nd Department of Surgery-Department of Cardiovascular Surgery, 1st Medical Faculty, Charles University and General University Hospital, Prague, Czech Republic
| | - Jan Hrubý
- 2nd Department of Surgery-Department of Cardiovascular Surgery, 1st Medical Faculty, Charles University and General University Hospital, Prague, Czech Republic
| | - Ivan Matia
- Department of Cardio-Vascular Surgery, Nord Hospital and Karl Landsteiner Institute for Cardio-Vascular Research, Vienna, Austria
| | - Barbora Honegrová
- Tissue Bank University Hospital Hradec, Hradec Králové, Czech Republic
| | - Jaroslav Lindner
- 2nd Department of Surgery-Department of Cardiovascular Surgery, 1st Medical Faculty, Charles University and General University Hospital, Prague, Czech Republic
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Spunda R, Hruby J, Mericka P, Mlcek M, Pecha O, Splith K, Schmelzle M, Krenzien F, Lindner J, Matia I, Spacek M. Immunosuppressive protocols with tacrolimus after cryopreserved aortal allotransplantation in rats. PLoS One 2018; 13:e0201984. [PMID: 30092051 PMCID: PMC6084974 DOI: 10.1371/journal.pone.0201984] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 07/23/2018] [Indexed: 11/18/2022] Open
Abstract
Objectives and design The aim of our study was to simulate in rats all aspects and techniques used in our new clinical program of cryopreserved alloarterial transplantation and investigate the influence of two immunosuppressive protocols with tacrolimus on acute rejection of these allografts. Materials and methods Cryopreserved abdominal aortic grafts were transplanted between Brown-Norway and Lewis rats. Tacrolimus (0.2 mg/kg daily) was administered from day 1 to day 30 (TAC1) or from day 7 to day 30 (TAC7), respectively. No immunosuppressed isogeneic (ISO) and allogeneic (ALO) rats combination served as control. Aortal wall infiltration by immunocompetent cells (MHC II+ cells of recipient origin) was studied on day 30 after transplantation. Flow cytometry was used for the analysis of day 30 sera for the presence of donor specific anti-MHC class I and II antibodies. Results The aortal allografts in both immunosuppressed groups showed regular morphology of aortal wall with no depositions of immunoglobulin G on day 30. The adventitial infiltration of non-immunosuppressed aortal allografts by MHC class II positive cells of recipient origin was significantly higher (ALO 20.7±6.7 cells, P<0.001) compared to both immunosuppressed groups (TAC1 5.9±5.5 cells, TAC7 6.1±5.1 cells). Day 30 sera from the allogeneic non-immunosuppressed animals decreased significantly the binding of fluorescence-labelled MHC class I (46.9±19.4%) and class II (65.8±11.9%) antibody to donors spleen cells compared with day 30 sera from both immunosuppressed groups (TAC1, anti-MHC class I 102.4±4.2%, p < 0.001, anti-MHC class II 102.6±6.0%), (TAC7, anti-MHC class I 79.9±3.3%, p < 0.001, anti-MHC class II 80.9±2.7%). Conclusion Both immunosuppressed protocols with tacrolimus (administration from day 1 or from day 7 following transplantation) were able to suppress acute cell- and antibody-mediated rejection of cryopreserved abdominal aortic allografts processed in accordance with our new standardized clinical protocol.
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Affiliation(s)
- Rudolf Spunda
- 2nd Department of Surgery - Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - Jan Hruby
- 2nd Department of Surgery - Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - Pavel Mericka
- Tissue Bank, Faculty Hospital Hradec Kralove, Charles University- Faculty of Medicine in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Mikulas Mlcek
- Institute of Physiology, First Faculty of Medicine, Charles University in Prague
| | - Ondrej Pecha
- Technology Centre of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Kathrin Splith
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Moritz Schmelzle
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Felix Krenzien
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Jaroslav Lindner
- 2nd Department of Surgery - Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - Ivan Matia
- Department of Cardio-Vascular Surgery, Hospital Hietzing and Karl Landsteiner Institute for Cardio-Vascular Research, Vienna, Austria
| | - Miroslav Spacek
- 2nd Department of Surgery - Department of Cardiovascular Surgery, 1st Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
- * E-mail:
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