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Albayrak T, Yanal H, Sengul D, Sengul I, Albayrak M, Eyüpoğlu S, Muhtaroğlu A, Cinar E. First management of percutaneous dilatational tracheostomy in severe acute respiratory syndrome coronavirus 2 akin to the vital head and neck region and thyroid gland bed: trust, but be careful whom (you trust)? REVISTA DA ASSOCIACAO MEDICA BRASILEIRA (1992) 2023; 69:e20230832. [PMID: 37792870 PMCID: PMC10547483 DOI: 10.1590/1806-9282.20230832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 07/04/2023] [Indexed: 10/06/2023]
Abstract
OBJECTIVE The objective of this study was to compare the clinical outcomes of percutaneous dilatational tracheostomy in COVID-19 and non-COVID-19 patients. METHODS A total of 48 patients who underwent percutaneous dilatational tracheostomy, with 24 COVID-19 patients (Group C) and 24 non-COVID-19 patients (Group N), were included in the study. Patients' demographic features including age and gender, time to intubation, duration of intubation, Acute Physiology and Chronic Health Evaluation scores, comorbidities, duration of opening tracheostomy, complications, duration of mechanical ventilation, length of stay in the intensive care units, and mortality were recorded and compared between the groups. RESULTS There was no statistically significant difference between the groups regarding age and gender (p=0.558 and p=0.110, respectively). Time to intubation was significantly more prolonged, and intubation follow-up duration was significantly shorter in Group C compared to Group N (p=0.034 and p=0.002, respectively). The Acute Physiology and Chronic Health Evaluation score was statistically significantly higher in Group N compared with Group C (p=0.012). The most common comorbidity was hypertension in 29 (60.4%) patients, followed by cerebrovascular disease in 19 (39.6%) patients. There was no statistically significant difference between the groups regarding mortality (p=0.212). CONCLUSION This study suggests that percutaneous dilatational tracheostomy can be performed safely in COVID-19 and non-COVID-19 patients. However, COVID-19 patients may have a longer time to intubation and shorter intubation follow-up duration than non-COVID-19 patients. The study also found a higher incidence of complications in COVID-19 patients undergoing percutaneous dilatational tracheostomy. These results emphasize the importance of careful patient selection, meticulous technique, and close postoperative monitoring in patients undergoing percutaneous dilatational tracheostomy, particularly in those with COVID-19.
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Affiliation(s)
- Tuna Albayrak
- Giresun University, Faculty of Medicine, Department of Anesthesiology and Reanimation – Giresun, Turkey
| | - Hülya Yanal
- Giresun Prof. Dr. A. Ilhan Ozdemir State Hospital, Department of Anesthesiology and Reanimation – Giresun, Turkey
| | - Demet Sengul
- Giresun University, Faculty of Medicine, Department of Pathology – Giresun, Turkey
| | - Ilker Sengul
- Giresun University, Faculty of Medicine, Division of Endocrine Surgery – Giresun, Turkey
- Giresun University, Faculty of Medicine, Department of General Surgery – Giresun, Turkey
| | - Mehmet Albayrak
- Karadeniz Technical University, Faculty of Medicine, Division of Perinatology – Giresun, Turkey
- Karadeniz Technical University, Faculty of Medicine, Department of Obstetrics and Gynecology – Giresun, Turkey
| | - Selin Eyüpoğlu
- Giresun University, Ministry of Health Education and Research Hospital, Division of Intensive Care Unit – Giresun, Turkey
- Giresun University, Ministry of Health Education and Research Hospital, Department of Anesthesiology and Reanimation – Giresun, Turkey
| | - Ali Muhtaroğlu
- Giresun University, Faculty of Medicine, Department of General Surgery – Giresun, Turkey
| | - Esma Cinar
- Giresun University, Faculty of Medicine, Department of Pathology – Giresun, Turkey
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Abreu MS, Tannuri ACA, Rodrigues RFG, Silva RJD, Gonçalves JDO, Serafini S, Tannuri U. Effects of local and remote ischemic postconditioning methods on ischemiareperfusion injury in a young animal model of acute mesenteric ischemia. Acta Cir Bras 2023; 38:e381323. [PMID: 37283357 DOI: 10.1590/acb381323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 02/22/2023] [Indexed: 06/08/2023] Open
Abstract
PURPOSE Acute mesenteric ischemia (AMI) is a condition in pediatric surgery that ranges from intestine necrosis to death. Ischemic postconditioning (IPoC) methods were developed to reduce the damage caused by revascularization. This study aimed to evaluate the efficacy of these methods in an experimental weaning rat model. METHODS Thirty-two 21-day-old Wistar rats were allocated into four groups according to the surgical procedure performed: control, ischemia-reperfusion injury (IRI), local (LIPoC) and remote IPoC (RIPoC). At euthanasia, fragments of the intestine, liver, lungs, and kidneys were submitted to histological, histomorphometric, and molecular analyses. RESULTS In the duodenum, intestines, and kidneys histological alterations promoted by IRI were reversed by remote postconditioning method. In the distal ileum, the histomorphometric alterations could be reversed by the postconditioning methods with more evident effects promoted by the remote method. The molecular analysis found that the levels of expression of Bax (proapoptotic) and Bcl-XL (antiapoptotic) genes in the intestine were increased by IRI. These alterations were equally reversed by the postconditioning methods, with more evident effects of the remote method. CONCLUSIONS IPoC methods positively reduced the damage caused by IRI in weaning rats.
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Affiliation(s)
- Mateus Souza Abreu
- Universidade de São Paulo - Faculdade de Medicina - Divisão de Cirurgia Pediátrica - São Paulo (SP), Brazil
| | - Ana Cristina Aoun Tannuri
- Universidade de São Paulo - Faculdade de Medicina - Divisão de Cirurgia Pediátrica - São Paulo (SP), Brazil
| | | | - Rafael José da Silva
- Universidade de São Paulo - Faculdade de Medicina - Divisão de Cirurgia Pediátrica - São Paulo (SP), Brazil
| | | | - Suellen Serafini
- Universidade de São Paulo - Faculdade de Medicina - Divisão de Cirurgia Pediátrica - São Paulo (SP), Brazil
| | - Uenis Tannuri
- Universidade de São Paulo - Faculdade de Medicina - Divisão de Cirurgia Pediátrica - São Paulo (SP), Brazil
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Sengul I, Sengul D. Clinical Insights on Pre- and Novel Postconditioning in Equine Jejunal Ischemia. Med Arch 2021; 75:237-238. [PMID: 34483457 PMCID: PMC8385745 DOI: 10.5455/medarh.2021.75.237-238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 06/30/2021] [Indexed: 11/25/2022] Open
Affiliation(s)
- Ilker Sengul
- Division of Endocrine Surgery, Giresun University Faculty of Medicine, Giresun, Turkey.,Department of General Surgery, Giresun University Faculty of Medicine, Giresun, Turkey
| | - Demet Sengul
- Department of Pathology, Giresun University, Faculty of Medicine, Giresun, Turkey
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Verhaar N, Breves G, Hewicker-Trautwein M, Pfarrer C, Rohn K, Burmester M, Schnepel N, Neudeck S, Twele L, Kästner S. The effect of ischaemic postconditioning on mucosal integrity and function in equine jejunal ischaemia. Equine Vet J 2021; 54:427-437. [PMID: 34003501 DOI: 10.1111/evj.13450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 01/27/2021] [Accepted: 04/01/2021] [Indexed: 12/21/2022]
Abstract
BACKGROUND Ischaemic postconditioning (IPoC) has been shown to ameliorate ischaemia reperfusion injury in different species and tissues. OBJECTIVES To assess the feasibility of IPoC in equine small intestinal ischaemia and to assess its effect on histomorphology, electrophysiology and paracellular permeability. STUDY DESIGN Randomised in vivo experiment. METHODS Experimental jejunal ischaemia was induced for 90 min in horses under general anaesthesia. In the control group (C; n = 7), the jejunum was reperfused without further intervention. In the postconditioning group (IPoC; n = 7), reocclusion was implemented following release of ischaemia by clamping the mesenteric vessels in three cycles of 30 seconds. This was followed by 120 minutes of reperfusion in both groups. Intestinal microperfusion and oxygenation was measured during IPoC using spectrophotometry and Doppler flowmetry. Histomorphology and histomorphometry of the intestinal mucosa were assessed. Furthermore, electrophysiological variables and unidirectional flux rates of 3 H-mannitol were determined in Ussing chambers. Western blot analysis was performed to determine the tight junction protein levels of claudin-1, claudin-2 and occludin in the intestinal mucosa. Comparisons between the groups and time points were performed using a two-way repeated measures analysis of variance (ANOVA) or non-parametric statistical tests for the ordinal and not normally distributed data (significance P < .05). RESULTS IPoC significantly reduced intestinal microperfusion during all clamping cycles yet affected oxygen saturation only during the first cycle. After reperfusion, Group IPoC showed significantly less mucosal villus denudation (mean difference 21.5%, P = .02) and decreased mucosal-to-serosal flux rates (mean difference 15.2 nM/cm2 /h, P = .007) compared to Group C. There were no significant differences between the groups for the other tested variables. MAIN LIMITATIONS Small sample size, long-term effects were not investigated. CONCLUSIONS Following IPoC, the intestinal mucosa demonstrated significantly less villus denudation and paracellular permeability compared to the untreated control group, possibly indicating a protective effect of IPoC on ischaemia reperfusion injury.
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Affiliation(s)
- Nicole Verhaar
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Gerhard Breves
- Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | - Christiane Pfarrer
- Institute for Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Karl Rohn
- Institute for Biometry and Epidemiology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Marion Burmester
- Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Nadine Schnepel
- Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Stephan Neudeck
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Lara Twele
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Sabine Kästner
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany.,Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
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Verhaar N, de Buhr N, von Köckritz-Blickwede M, Hewicker-Trautwein M, Pfarrer C, Mazzuoli-Weber G, Schulte H, Kästner S. Ischaemic postconditioning reduces apoptosis in experimental jejunal ischaemia in horses. BMC Vet Res 2021; 17:175. [PMID: 33902575 PMCID: PMC8077964 DOI: 10.1186/s12917-021-02877-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 04/12/2021] [Indexed: 03/06/2023] Open
Abstract
BACKGROUND Ischaemic postconditioning (IPoC) refers to brief periods of reocclusion of blood supply following an ischaemic event. This has been shown to ameliorate ischaemia reperfusion injury in different tissues, and it may represent a feasible therapeutic strategy for ischaemia reperfusion injury following strangulating small intestinal lesions in horses. The objective of this study was to assess the degree cell death, inflammation, oxidative stress, and heat shock response in an equine experimental jejunal ischaemia model with and without IPoC. METHODS In this randomized, controlled, experimental in vivo study, 14 horses were evenly assigned to a control group and a group subjected to IPoC. Under general anaesthesia, segmental ischaemia with arterial and venous occlusion was induced in 1.5 m jejunum. Following ischaemia, the mesenteric vessels were repeatedly re-occluded in group IPoC only. Full thickness intestinal samples and blood samples were taken at the end of the pre-ischaemia period, after ischaemia, and after 120 min of reperfusion. Immunohistochemical staining or enzymatic assays were performed to determine the selected variables. RESULTS The mucosal cleaved-caspase-3 and TUNEL cell counts were significantly increased after reperfusion in the control group only. The cleaved-caspase-3 cell count was significantly lower in group IPoC after reperfusion compared to the control group. After reperfusion, the tissue myeloperoxidase activity and the calprotectin positive cell counts in the mucosa were increased in both groups, and only group IPoC showed a significant increase in the serosa. Tissue malondialdehyde and superoxide dismutase as well as blood lactate levels showed significant progression during ischaemia or reperfusion. The nuclear immunoreactivity of Heat shock protein-70 increased significantly during reperfusion. None of these variables differed between the groups. The neuronal cell counts in the myenteric plexus ganglia were not affected by the ischaemia model. CONCLUSIONS A reduced apoptotic cell count was found in the group subjected to IPoC. None of the other tested variables were significantly affected by IPoC. Therefore, the clinical relevance and possible protective mechanism of IPoC in equine intestinal ischaemia remains unclear. Further research on the mechanism of action and its effect in clinical cases of strangulating colic is needed.
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Affiliation(s)
- Nicole Verhaar
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany.
| | - Nicole de Buhr
- Department of Biochemistry, University of Veterinary Medicine Hannover, Hannover, Germany
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Maren von Köckritz-Blickwede
- Department of Biochemistry, University of Veterinary Medicine Hannover, Hannover, Germany
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | - Christiane Pfarrer
- Institute for Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Gemma Mazzuoli-Weber
- Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Henri Schulte
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Sabine Kästner
- Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
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Sengul I, Sengul D, Pelikán A. Interpretations on Preconditioning with Lidocaine and Xylazine in Experimental Equine Jejunal Ischaemia. Med Arch 2020; 74:323-324. [PMID: 33041455 PMCID: PMC7520056 DOI: 10.5455/medarh.2020.74.323-324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Ilker Sengul
- Division of Endocrine Surgery, Giresun University Faculty of Medicine, Giresun, Turkey.,Department of General Surgery, Giresun University Faculty of Medicine, Giresun, Turkey
| | - Demet Sengul
- Department of Pathology, Giresun University Faculty of Medicine, Giresun, Turkey
| | - Anton Pelikán
- Department of Health Care Sciences, Faculty of Humanities, Univerzita Tomáše Bati ve Zlíně, Zlín, Czech Republic.,Department of General Surgery, Faculty of Medicine, Ostravska Univerzita V Ostrave, Ostrava, Czech Republic
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Verhaar N, Pfarrer C, Neudeck S, König K, Rohn K, Twele L, Kästner S. Preconditioning with lidocaine and xylazine in experimental equine jejunal ischaemia. Equine Vet J 2020; 53:125-133. [PMID: 32119148 DOI: 10.1111/evj.13251] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 12/17/2019] [Accepted: 02/20/2020] [Indexed: 01/01/2023]
Abstract
BACKGROUND Pharmacological preconditioning of dexmedetomidine on small intestinal ischaemia/reperfusion injury has been reported in different animal models including horses. OBJECTIVES The objective was to assess if xylazine and lidocaine have a preconditioning effect in an experimental model of equine jejunal ischaemia. STUDY DESIGN Terminal in vivo experiment. METHODS Ten horses under general anaesthesia were either preconditioned with xylazine (group X; n = 5) or lidocaine (group L; n = 5). A historical untreated control group (group C; n = 5) was used for comparison. An established experimental model of equine jejunal ischaemia was applied, and intestinal samples were taken pre-ischaemia, after ischaemia and following reperfusion. Histomorphological examination was performed based on a modified Chiu score. Immunohistochemical staining for cleaved caspase-3, TUNEL and calprotectin was performed, and positive cell counts were expressed in cells/mm2 . RESULTS There was no progression of histomorphological mucosal injury from ischaemia to reperfusion, and there were no differences in histomorphology between the groups. After ischaemia, group X had significantly less caspase-positive cells compared to the control group with a median difference of 227% (P = .01). After reperfusion, group X exhibited significantly lower calprotectin-positive cell counts compared to the control group, with a median difference of 6.8 cells/mm2 in the mucosa and 44 cells in the serosa (P = .02 and .05 respectively). All groups showed an increase in caspase- and calprotectin-positive cells during reperfusion (P < .05). TUNEL-positive cells increased during ischaemia, followed by a decrease after reperfusion (P < .05). MAIN LIMITATIONS The small sample size and the use of a historical control group. Preconditioning effects of the tested drugs may be masked by the protective effects of isoflurane in the anaesthetic protocol. CONCLUSIONS Preconditioning with lidocaine did not have any effect on the tested variables. The lower cell counts of caspase- and calprotectin-positive cells in group X may indicate a beneficial effect of xylazine on ischaemia/reperfusion injury. Due to the absence of a concurrent reduction of histomorphological injury, the clinical significance remains uncertain.
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Affiliation(s)
- Nicole Verhaar
- Clinic for Horses, University of Veterinary Medicine, Hannover, Germany
| | - Christiane Pfarrer
- Institute for Anatomy, University of Veterinary Medicine, Hannover, Germany
| | - Stephan Neudeck
- Clinic for Horses, University of Veterinary Medicine, Hannover, Germany
| | - Kathrin König
- Clinic for Horses, University of Veterinary Medicine, Hannover, Germany
| | - Karl Rohn
- Department of Biometry, University of Veterinary Medicine, Hannover, Germany
| | - Lara Twele
- Clinic for Horses, University of Veterinary Medicine, Hannover, Germany
| | - Sabine Kästner
- Clinic for Horses, University of Veterinary Medicine, Hannover, Germany
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A 30-Minute Supraceliac Aortic Clamping in the Rat Causes Death Due to an Inflammatory Response and Pulmonary Lesions. Ann Vasc Surg 2018; 52:192-200. [PMID: 29673584 DOI: 10.1016/j.avsg.2017.12.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 11/30/2017] [Accepted: 12/01/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND The treatment of thoracoabdominal aortic aneurysms through an open approach has general and pulmonary consequences of multiple etiologies. Our assumption was that the supraceliac aortic clamping needed for this operation causes a systemic inflammatory response associated with a pulmonary attack. METHODS We developed a model of 30-min supraceliac aortic clamping in Wistar rats weighing 300 g. After 90 min of reperfusion, the rats were sacrificed. The effects on the digestive tract wall were analyzed by measurement of the mucosal thickness/total thickness ratio. The effects on the mesenteric endothelial function were determined by an ex situ measurement of the arterial pressure/volume curves (third branch). The systemic consequences of the procedure were analyzed by dosing tumor necrosis factor alpha (TNFα), interleukin (IL)1β, and IL10 in the blood. The pulmonary consequences were analyzed by the measurement of macrophages, polymorphonuclear neutrophils (PNs), T lymphocyte infiltration, pulmonary apoptosis (TUNEL) and active caspase 3. The experimental scheme included 20 rats with ischemia-reperfusion (IR) and 20 control rats. An analysis of survival was carried out on 20 other rats (10 IR and 10 controls). RESULTS The results were expressed as average ± standard error of the mean. The statistical tests were Student's t-test and Mann-Whitney test. This visceral IR model decreased the ratio of the thickness of the intestinal mucosa compared with that of the control rats (0.77 ± 0.008 vs. 0.82 ± 0.009 [P < 0.001]). This local effect was not accompanied by any mesenteric endothelial dysfunction (P = 0.91). On a systemic level, IR increased TNFα (37.9 ± 1.5 vs. 28.2 ± 0.6 pg/mL; P < 0.0001), IL1β (67.1 ± 9.8 vs. 22.5 ± 5.6 pg/mL; P < 0.001), and IL10 (753.3 ± 96 vs. 3.7 ± 1.7 pg/mL; P < 0.0001). As regards the lungs, IR increased the parenchymal cellular infiltration by macrophages (6.8 ± 0.8 vs. 4.5 ± 0.4 cells per field; P < 0.05) and PNs (7.4 ± 0.5 vs. 6.2 ± 03 cells per field; P < 0.05). There was no increase in the pulmonary cellular apoptosis measured by TUNEL (P = 0.77) or in the caspase 3 activity (P = 0.59). The mortality of the visceral IR rats was 100% at 36 hr vs. 0% in the animals without IR. CONCLUSIONS This work showed that the inflammatory response to visceral IR had systemic and pulmonary effects which always results in the death in the rat.
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Jia Z, Lian W, Shi H, Cao C, Han S, Wang K, Li M, Zhang X. Ischemic Postconditioning Protects Against Intestinal Ischemia/Reperfusion Injury via the HIF-1α/miR-21 Axis. Sci Rep 2017; 7:16190. [PMID: 29170412 PMCID: PMC5700993 DOI: 10.1038/s41598-017-16366-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 11/12/2017] [Indexed: 12/30/2022] Open
Abstract
Intestinal ischemia/reperfusion (I/R) can lead to tissue damage associated with inflammation and mucosal apoptosis. Ischemic postconditioning (IPostC), a series of repeated, brief, intermittent periods of ischemia and reperfusion, has beneficial effects against I/R-induced injury in the heart and intestine, although the underlying mechanisms for these effects remain unclear. We evaluated the involvement of microRNA-21 (miR-21) in the protective effects of IPostC in a rat model of I/R induced by superior mesenteric artery occlusion and reopening. IPostC decreased I/R injury and suppressed apoptosis in the intestinal tissues concomitant with the induction of hypoxia inducible factor 1 alpha (HIF-1α) and the upregulation of miR-21. In vitro experiments in the intestinal epithelial cell line IEC-6 showed that hypoxia induced miR-21 and this effect was abolished by silencing HIF1-α, confirming the induction of miR-21 by HIF1-α, HIF1-α or miR-21 inhibition exacerbated I/R induced apoptosis, and programmed cell death 4 (PDCD4) and Fas-L was involved in miR-21 mediated anti-apoptotic effects on intestinal epithelial cells. Knockdown of miR-21 or inhibition of HIF1-α abolished the IPostC-mediated attenuation of intestinal injury and apoptosis and the downregulation of PDCD4 and Fas-L. A potential mechanism underlying the protective effect of IPostC may therefore involve the induction of miR-21 by HIF1-α and the attenuation of apoptosis via the downregulation of PDCD4 and Fas-L.
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Affiliation(s)
- Zhongzhi Jia
- Department of Interventional Radiology, No. 2 People's Hospital of Changzhou, Nanjing Medical University, Chang zhou, 213003, China
| | - Weishuai Lian
- Department of Interventional Radiology, Shanghai Tenth People's Hospital, Shanghai, 200072, China
| | - Haifeng Shi
- Department of Interventional Radiology, No. 2 People's Hospital of Changzhou, Nanjing Medical University, Chang zhou, 213003, China
| | - Chuanwu Cao
- Department of Interventional Radiology, Shanghai Tenth People's Hospital, Shanghai, 200072, China
| | - Shilong Han
- Department of Interventional Radiology, Shanghai Tenth People's Hospital, Shanghai, 200072, China
| | - Kai Wang
- Department of Interventional Radiology, No. 2 People's Hospital of Changzhou, Nanjing Medical University, Chang zhou, 213003, China
| | - Maoquan Li
- Department of Interventional Radiology, Shanghai Tenth People's Hospital, Shanghai, 200072, China. .,Institute of Medical Intervention Engineering, Tongji University, Shanghai, 200072, China.
| | - Xiaoping Zhang
- Institute of Medical Intervention Engineering, Tongji University, Shanghai, 200072, China.
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Santos CHMD, Aydos RD, Nogueira Neto E, Miiji LNO, Cassino PC, Ahmed II, Calheiros NM, Garcia M, Silva AFD. Importance of duration and number of ischemic postconditioning cycles in preventing reperfusion mesenteric injuries. Experimental study in rats. Acta Cir Bras 2015; 30:709-14. [DOI: 10.1590/s0102-865020150100000009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 09/17/2015] [Indexed: 02/03/2023] Open
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Nakamura RK, Santos CHMD, Miiji LNO, Arakaki MS, Maedo CM, Érnica Filho M, Cassino PC, Pontes ERJC. Very short cycles of postconditioning have no protective effect against reperfusion injury. Experimental study in rats. Braz J Cardiovasc Surg 2015; 29:521-6. [PMID: 25714204 PMCID: PMC4408813 DOI: 10.5935/1678-9741.20140088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 07/01/2014] [Indexed: 11/21/2022] Open
Abstract
Introduction Ischemic postconditioning has been recognized as effective in the prevention of
reperfusion injury in situations of ischemia and reperfusion in various organs and
tissues. However, it remains unclear what would be the best way to accomplish it,
since studies show great variation in the method of their application. Objective To assess the protective effect of ischemic postconditioning on ischemia and
reperfusion in rats undergoing five alternating cycles of reperfusion and ischemia
of 30 seconds each one. Methods We studied 25 Wistar rats distributed in three groups: group A (10 rats), which
underwent mesenteric ischemia (30 minutes) and reperfusion (60 minutes); Group B
(10 rats), undergoing ischemia (30 minutes) and reperfusion (60 minutes),
intercalated by postconditioning (5 alternating cycles of reperfusion and ischemia
of 30 seconds each one); and group C - SHAM (5 rats), undergoing only laparotomy
and manipulation of mesenteric artery. All animals underwent resection of an ileum
segment for histological analysis. Results The mean lesions degree according to Chiu et al. were: group A, 2.77, group B,
2.67 and group C, 0.12. There was no difference between groups A and B
(P>0.05). Conclusion Ischemic postconditioning was not able to minimize or prevent the intestinal
tissue injury in rats undergoing ischemia and reperfusion process when used five
cycles lasting 30 seconds each one.
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Affiliation(s)
| | | | | | - Mariana Sousa Arakaki
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Cristiane Midori Maedo
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Maurício Érnica Filho
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Pedro Carvalho Cassino
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
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