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Guillot M, Charles AL, Lejay A, Pottecher J, Meyer A, Georg I, Goupilleau F, Diemunsch P, Geny B. Deleterious Effects of Remote Ischaemic Per-conditioning During Lower Limb Ischaemia-Reperfusion in Mice. Eur J Vasc Endovasc Surg 2021; 62:953-959. [PMID: 34364768 DOI: 10.1016/j.ejvs.2021.06.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 06/15/2021] [Accepted: 06/23/2021] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The aim of this study was to investigate whether remote ischaemic per-conditioning might protect skeletal muscle during lower limb ischaemia-reperfusion (IR). METHODS Twenty-three male C57BL/6 mice were randomised into three groups: sham group (n = 7), IR group (unilateral tourniquet induced three hours of ischaemia followed by 24 hours of reperfusion, n = 8), and remote ischaemic per-conditioning group (RIPerC) (three cycles of 10 minute IR episodes on the non-ischaemic contralateral hindlimb, n = 8). Oxygraphy, spectrofluorometry, and electron paramagnetic resonance spectroscopy were performed in order to determine mitochondrial respiratory chain complexes activities, mitochondrial calcium retention capacity (CRC) and reactive oxygen species (ROS) production in skeletal muscle. RESULTS IR impaired mitochondrial respiration (3.66 ± 0.98 vs. 7.31 ± 0. 54 μmol/min/g in ischaemic and sham muscles, p = .009 and p = .003 respectively) and tended to impair CRC (2.53 ± 0.32 vs. 3.64 ± 0.66 μmol/mg in ischaemic and sham muscles respectively, p = .066). IR did not modify ROS production (0.082 ± 0.004 vs. 0.070 ± 0.004 μmol/min/mg in ischaemic and sham muscles respectively, p = .74). RIPerC failed to restore mitochondrial respiration (3.82 ± 0.40 vs. 3.66 ± 0.98 μmol/min/g in ischaemic muscles from the RIPerC group and the IR group respectively, p = .45) and CRC (2.76 ± 0.3 vs. 2.53 ± 0.32 μmol/mg in ischaemic muscles from the RIPerC group and the IR group respectively, p = .25). RIPerC even impaired contralateral limb mitochondrial respiration (3.85 ± 0.34 vs. 7.31 ± 0. 54 μmol/min/g in contralateral muscles and sham muscles respectively, -47.3%, p = .009). CONCLUSION RIPerC failed to protect ischaemic muscles and induced deleterious effects on the contralateral non-ischaemic muscles. These data do not support the concept of RIPerC.
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Affiliation(s)
- Max Guillot
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Reanimation, University Hospital of Strasbourg, France
| | - Anne-Laure Charles
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Physiology, University Hospital of Strasbourg, France
| | - Anne Lejay
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Vascular Surgery and Kidney Transplantation, University Hospital of Strasbourg, France.
| | - Julien Pottecher
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Anaesthesiology, Critical Care and Peri-operative Medicine, University Hospital of Strasbourg, France
| | - Alain Meyer
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Physiology, University Hospital of Strasbourg, France
| | - Isabelle Georg
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France
| | - Fabienne Goupilleau
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France
| | - Pierre Diemunsch
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Vascular Surgery and Kidney Transplantation, University Hospital of Strasbourg, France
| | - Bernard Geny
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Physiology, University Hospital of Strasbourg, France
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Monteiro AM, Couteiro RP, Silva DFD, Trindade Júnior SC, Silva RC, Sousa LFFD, Santos DRD, Freitas JJDS, Brito MVH. Remote ischemic conditioning improves rat brain antioxidant defense in a time-dependent mechanism. Acta Cir Bras 2021; 36:e360707. [PMID: 34495142 PMCID: PMC8428670 DOI: 10.1590/acb360707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 06/22/2021] [Indexed: 08/30/2023] Open
Abstract
Purpose To clarify the best protocol for performing remote ischemic conditioning and
to minimize the consequences of ischemia and reperfusion syndrome in brain,
the present study aimed to evaluate different time protocols and the
relation of the organs and the antioxidant effects of this technique. Methods The rat’s left femoral artery was clamped with a microvascular clamp in times
that ranged from 1 to 5 minutes, according to the corresponding group. After
the cycles of remote ischemic conditioning and a reperfusion of 20 minutes,
the brain and the left gastrocnemius were collected. The samples were used
to measure glutathione peroxidase, glutathione reductase and catalase
levels. Results In the gastrocnemius, the 4-minute protocol increased the catalase
concentration compared to the 1-minute protocol, but the latter increased
both glutathione peroxidase and glutathione reductase compared to the
former. On the other hand, the brain demonstrated higher catalase and
glutathione peroxidase in 5-minute group, and the 3-minute group reached
higher values of glutathione reductase. Conclusions Remote ischemic conditioning increases brain antioxidant capacity in a
time-dependent way, while muscle presents higher protection on 1-minute
cycles and tends to decrease its defence with longer cycles of intermittent
occlusions of the femoral artery.
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Xu L, Kang F, Hu W, Liu X. Higher Concentration of Hypertonic Saline Shows Better Recovery Effects on Rabbits with Uncontrolled Hemorrhagic Shock. Med Sci Monit 2019; 25:8120-8130. [PMID: 31662580 PMCID: PMC6842271 DOI: 10.12659/msm.916937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background Our previous study found a novel fluid combination with better resuscitation effects under hypotensive condition at the early stage of uncontrolled hemorrhagic shock (UHS). However, the optimal recovery concentration of hypertonic saline in this fluid combination remains unknown. This experiment aimed to explore the optimal concentration. Material/Methods New Zealand white rabbits (n=40) were randomly divided into 5 groups, including a sham-operated group (SO), a shock non-treated group (SNT), a normal saline group (NS), and hypertonic saline groups (4.5% and 7.5%). We established an UHS model and administered various fluid combinations (dose-related sodium chloride solution+crystal-colloidal solution) to the groups followed by monitoring indexes of hemodynamic and renal function, measuring infusion volume and blood loss, and analyzing pathological morphology by hematoxylin and eosin staining. Results The hypertonic saline groups showed more stable hemodynamic indexes, reduced blood loss, fewer required infusions, and milder decreases in renal function than those of control groups (SNT and NS groups), and exhibited fewer pathological changes in the heart, lung, kidney, and liver. All indexes in the 4.5% and 7.5% groups were better than those of the NS group, and the hemodynamic indexes in the 7.5% group were more stable than those of the 4.5% group (P<0.05), with reduced blood loss and infusion volume and a milder decrease in renal function. Conclusions The novel fluid combination with 7.5% hypertonic saline group had a better recovery effect at the early stage of UHS before hemostasis compared to that of the 4.5% hypertonic saline group. This result may provide guidance for clinical fluid resuscitation.
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Affiliation(s)
- Lei Xu
- Department of Nursing, Air Force Medical University, Xi'an, Shanxi, China (mainland)
| | - Fengjuan Kang
- General Hospital of People's Liberation Army (PLA), Beijing, China (mainland)
| | - Wendong Hu
- Department of Aerospace Medicine, Air Force Medical University, Xi'an, Shanxi, China (mainland)
| | - Xiwen Liu
- Department of Nursing, Air Force Medical University, Xi'an, Shanxi, China (mainland)
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Abstract
Hepatic ischemia-reperfusion injury is a common complication of liver surgery and an important cause of liver dysfunction after operation. The pathogenesis of liver ischemia-reperfusion injury is very complex, involving many factors. Autophagy is a lysosomal degradation pathway on which eukaryotic cells rely to maintain the cell homeostasis. Autophagy plays an important role in the process of liver ischemia-reperfusion injury. However, the specific role and mechanism of autophagy in liver ischemia-reperfusion injury are still controversial. In this paper, we reivew the role and mechanism of autophagy in hepatic ischemia-reperfusion injury.
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Affiliation(s)
- Zi-Yi Li
- Department of General Surgery, People's Hospital of Daqing, Daqing 163316, Heilongjiang Province, China
| | - Li-Quan Tong
- Department of General Surgery, People's Hospital of Daqing, Daqing 163316, Heilongjiang Province, China
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