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Mester A, Magyar Z, Sogor V, Tanczos B, Stark Y, Cherniavsky K, Bidiga L, Peto K, Nemeth N. Intestinal ischemia-reperfusion leads to early systemic micro-rheological and multiorgan microcirculatory alterations in the rat. Clin Hemorheol Microcirc 2018; 68:35-44. [DOI: 10.3233/ch-170278] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Anita Mester
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Zsuzsanna Magyar
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Viktoria Sogor
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Bence Tanczos
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Yoav Stark
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Konstantin Cherniavsky
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Laszlo Bidiga
- Department of Pathology, University of Debrecen, Hungary
| | - Katalin Peto
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Norbert Nemeth
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
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Miko I, Nemeth N, Sogor V, Kiss F, Toth E, Peto K, Furka A, Vanyolos E, Toth L, Varga J, Szigeti K, Benkő I, Olah AV, Furka I. Comparative erythrocyte deformability investigations by filtrometry, slit-flow and rotational ektacytometry in a long-term follow-up animal study on splenectomy and different spleen preserving operative techniques: Partial or subtotal spleen resection and spleen autotransplantation. Clin Hemorheol Microcirc 2017; 66:83-96. [PMID: 28128749 DOI: 10.3233/ch-160231] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Partial or subtotal spleen resection or spleen autotransplantation can partly preserve/restore the splenic filtration function, as previous studies demonstrated. OBJECTIVE For better evaluation and follow-up of the various spleen-preserving operative techniques' effectiveness versus splenectomy, a composite methodological approach was applied in a canine experimental model. METHODS Beagle dogs were subjected to control (n = 6), splenectomy (SE, n = 4), partial and subtotal spleen resection (n = 4/each) or spleen autotransplantation groups (AU, Furka's spleen-chip method, n = 8). The follow-up period was 18 postoperative (p.o.) months. Erythrocyte deformability was determined in parallel by bulk filtrometry (Carat FT-1 filtrometer), slit-flow ektacytometry (RheoScan D-200) and rotational ektacytometry (LoRRca MaxSis Osmoscan). RESULTS By filtrometry, relative cell transit time increased in the SE group (mostly in animal Nr. SE-3), showing the highest values on the 3rd, 9th and in 18th p.o. months. Elongation index values decreased in this group (both by slit-flow and rotational ektacytometers). In general, AU and two resection groups' values were lower versus control and higher than in SE. CONCLUSIONS Forasmuch in the circulation both elongation by shear stress and filtration occur, these various erythrocyte deformability testing methods together may describe better the alterations. Considering the possible complications related to functional asplenic-hyposplenic conditions, individual analysis of cases is highly important.
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Affiliation(s)
- Iren Miko
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Norbert Nemeth
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Viktoria Sogor
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Ferenc Kiss
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Eniko Toth
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Katalin Peto
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Andrea Furka
- Department of Clinical Oncology, Division of Radiotherapy, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Erzsebet Vanyolos
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Laszlo Toth
- Department of Pathology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Jozsef Varga
- Department of Nuclear Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Krisztian Szigeti
- Department of Biophysics and Radiation Biology, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Ilona Benkő
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Anna V Olah
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Istvan Furka
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Dioszegi A, Vass M, Nemeth N, Sogor V, Barath S, Kaplar M, Soltesz P. Rheopheresis treatment of diabetic foot syndrome. Atherosclerosis 2017. [DOI: 10.1016/j.atherosclerosis.2017.06.877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Magyar Z, Molnar A, Nachmias DB, Mann D, Sogor V, Mester A, Peto K, Nemeth N. Impact of groin flap ischemia-reperfusion on red blood cell micro-rheological parameters in a follow-up study on rats. Clin Hemorheol Microcirc 2017; 79:245-255. [PMID: 28550242 DOI: 10.3233/ch-170277] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Flap hypoperfusion or ischemia-reperfusion (I/R) may occur during preparation-transposition procedures and by postoperative thrombotic complications. Behind the microcirculatory disturbances micro-rheological alterations are also supposed. OBJECTIVE We aimed to investigate the groin flap I/R with following-up micro-rheological parameters. METHODS Anesthetized rats were subjected to Control or I/R groups. Groin flaps were prepared bilaterally, pedicled on the superficial epigastric vessels. In Control group the flaps were re-sutured after one hour, while in I/R group microvascular clips were applied on the pedicles for 60 minutes, then the flaps were repositioned. Besides daily wound control, before the operation and on the 1st, 3rd, 5th, 7th and 14th postoperative days blood samples were collected for testing red blood cell (RBC) deformability (rotational ektacytometry) and aggregation (light-transmission aggregometry). RESULTS RBC deformability significantly worsened by the 3rd-7th postoperative day in I/R group. RBC aggregation enhanced significantly by the 1st day, in I/R group it remained elevated on the 3rd day as well. In a complicated case with unilateral flap necrosis, RBC deformability and aggregation worsening was outlined from its group (base, 1st, 3rd day). CONCLUSION Wound healing affected micro-rheological parameters in the early postoperative period. Flap I/R exacerbated the alterations. The parameters markedly worsened in case of flap necrosis.
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Affiliation(s)
- Zsuzsanna Magyar
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Abel Molnar
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - David Belkin Nachmias
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Din Mann
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Viktoria Sogor
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Anita Mester
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Katalin Peto
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Norbert Nemeth
- Department of Operative Techniques and Surgical Research, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Nemeth N, Sogor V, Kiss F, Ulker P. Interspecies diversity of erythrocyte mechanical stability at various combinations in magnitude and duration of shear stress, and osmolality. Clin Hemorheol Microcirc 2017; 63:381-398. [PMID: 26890103 DOI: 10.3233/ch-152031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We hypothesized that the results of red blood cell mechanical stability test show interspecies differences. The comparative investigations were performed on blood samples obtained from rats, beagle dogs, pigs and healthy volunteers. Mechanical stress was applied in nine combinations: 30, 60 or 100 Pa shear stress for 100, 200 or 300 seconds. Generally, rat erythrocytes showed the highest capability of resistance. With the applied combinations of mechanical stress pig erythrocytes were the most sensitive. On human erythrocytes 60 Pa for 200 s was the minimum combination to result significant deformability deterioration. By increasing the magnitude and duration of the applied mechanical stress we experienced escalating deformability impairment in all species. 100 Pa shear stress for 300 seconds on human erythrocytes showed the largest deformability impairment. The mechanical stability test results were also dependent on osmolality. At hypoosmolar range (200 mOsmol/kg) the mechanical stress improved EI data mostly in rat and porcine blood. At higher osmolality (500 mOsmol/kg), the test did not show detectable difference, while in 250-300 mOsmol/kg range the differences were well observable. In summary, erythrocytes' capability of resistance against mechanical stress shows interspecies differences depending on the magnitude and duration of the applied stress, and on the osmolality.
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Affiliation(s)
- Norbert Nemeth
- Department of Operative Techniques and Surgical Research, Institute of Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - Viktoria Sogor
- Department of Operative Techniques and Surgical Research, Institute of Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - Ferenc Kiss
- Department of Operative Techniques and Surgical Research, Institute of Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - Pinar Ulker
- Department of Physiology, Akdeniz University Faculty of Medicine, Antalya, Turkey
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Nemeth N, Peto K, Deak A, Sogor V, Varga G, Tanczos B, Balog K, Csiszko A, Godo Z, Szentkereszty Z. Hemorheological factors can be informative in comparing treatment possibilities of abdominal compartment syndrome. Clin Hemorheol Microcirc 2017; 64:765-775. [DOI: 10.3233/ch-168027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Norbert Nemeth
- Department of Operative Techniques & Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Katalin Peto
- Department of Operative Techniques & Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Adam Deak
- Department of Operative Techniques & Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Viktoria Sogor
- Department of Operative Techniques & Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Gabor Varga
- Department of Operative Techniques & Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Bence Tanczos
- Department of Operative Techniques & Surgical Research, Faculty of Medicine, University of Debrecen, Hungary
| | - Klaudia Balog
- Institute of Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - Adrienn Csiszko
- Institute of Surgery, Faculty of Medicine, University of Debrecen, Hungary
| | - Zoltan Godo
- Department of Information Technology, Faculty of Informatics, University of Debrecen, Hungary
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Pazmandi K, Agod Z, Kumar BV, Szabo A, Fekete T, Sogor V, Veres A, Boldogh I, Rajnavolgyi E, Lanyi A, Bacsi A. Oxidative modification enhances the immunostimulatory effects of extracellular mitochondrial DNA on plasmacytoid dendritic cells. Free Radic Biol Med 2014; 77:281-90. [PMID: 25301097 DOI: 10.1016/j.freeradbiomed.2014.09.028] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/03/2014] [Accepted: 09/26/2014] [Indexed: 12/14/2022]
Abstract
Inflammation is associated with oxidative stress and characterized by elevated levels of damage-associated molecular pattern (DAMP) molecules released from injured or even living cells into the surrounding microenvironment. One of these endogenous danger signals is the extracellular mitochondrial DNA (mtDNA) containing evolutionary conserved unmethylated CpG repeats. Increased levels of reactive oxygen species (ROS) generated by recruited inflammatory cells modify mtDNA oxidatively, resulting primarily in accumulation of 8-oxo-7,8-dihydroguanine (8-oxoG) lesions. In this study, we examined the impact of native and oxidatively modified mtDNAs on the phenotypic and functional properties of plasmacytoid dendritic cells (pDCs), which possess a fundamental role in the regulation of inflammation and T cell immunity. Treatment of human primary pDCs with native mtDNA up-regulated the expression of a costimulatory molecule (CD86), a specific maturation marker (CD83), and a main antigen-presenting molecule (HLA-DQ) on the cell surface, as well as increased TNF-α and IL-8 production from the cells. These effects were more apparent when pDCs were exposed to oxidatively modified mtDNA. Neither native nor oxidized mtDNA molecules were able to induce interferon (IFN)-α secretion from pDCs unless they formed a complex with human cathelicidin LL-37, an antimicrobial peptide. Interestingly, simultaneous administration of a Toll-like receptor (TLR)9 antagonist abrogated the effects of both native and oxidized mtDNAs on human pDCs. In a murine model, oxidized mtDNA also proved a more potent activator of pDCs compared to the native form, except for induction of IFN-α production. Collectively, we demonstrate here for the first time that elevated levels of 8-oxoG bases in the extracellular mtDNA induced by oxidative stress increase the immunostimulatory capacity of mtDNA on pDCs.
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Affiliation(s)
- Kitti Pazmandi
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Zsofia Agod
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Brahma V Kumar
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Attila Szabo
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Tunde Fekete
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Viktoria Sogor
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Agota Veres
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX 77555, USA
| | - Eva Rajnavolgyi
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Arpad Lanyi
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary
| | - Attila Bacsi
- Department of Immunology, Faculty of Medicine, University of Debrecen, 98 Nagyerdei Blvd., Debrecen H-4012, Hungary.
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