After preflush with streptokinase, a mostly homogenous distribution of the preservation solution was observed throughout the liver tissue. The choice of the flush-out solution UW or HTK had no influence on parenchymal enzyme leakage, hepatic bile production, or tissue levels of ATP after reperfusion of the livers.
Fibrinolytic preflush, however, resulted in a relevant and significant improvement of structural integrity as well as functional and metabolic recovery. Compromised vascular tissue perfusion upon organ harvest in NHBD triggers graft dysfunction after cold storage and can easily be circumvented by temporary fibrinolysis before graft retrieval. The global shortage of donor organs for transplantation has necessitated the expansion of the organ pool through increased use of organs from less ideal donors.
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Venous systemic oxygen persufflation VSOP and oxygenated machine perfusion OMP have previously demonstrated beneficial results compared to cold storage CS in the preservation of warm-ischemia-damaged kidney grafts. The aim of this study was to compare the efficacy of VSOP and OMP for the preservation of warm-ischemia-damaged porcine kidneys using the recently introduced Ecosol preservation solution compared to CS using Ecosol or histidine-tryptophan-ketoglutarate solution HTK.
As controls, kidneys without warm ischemia, cold stored for 24 h in HTK , were employed. During reperfusion, urine production was significantly higher in the VSOP and OMP groups than in the CS- HTK group; however, only VSOP could demonstrate lower urine protein concentrations and fractional excretion of sodium, which did not differ from the non-warm-ischemia-damaged control group. Contractile properties of rat skeletal muscles following storage at 4 degrees C. The purpose of this study was to assess the potential of preservation solutions for protecting skeletal muscle function during storage at 4 degrees C.
After storage, muscles were stimulated electrically to analyse the isometric contractile properties, such as the maximum tetanic tension P 0. Histological analysis was also performed. In separate experiments, the effect of the diffusion distance on muscle preservation was studied by bisecting the soleus. Muscle function deteriorated most after storage in KH P 0 at 16 h: The functional data corresponded well with the histological data, which showed increasing muscle fibre derangement with increasing storage time.
For both muscles and all solutions, the threshold stimulus current increased with increasing storage time control, 0. The diffusion distance is a critical factor for successful preservation of muscle function at 4 degrees C. Albumin augmentation improves condition of guinea pig hearts after 4 hr of cold ischemia. Major causes of death after heart transplantation are right ventricular pump failure and, chronically, cardiac allograft vasculopathy.
Recently, the endothelial surface layer, composed of the endothelial glycocalyx and plasma proteins, was discovered to play a major role in vascular barrier function, edema formation, and leukocyte-to-endothelial interaction. The impact of augmenting a traditional preservation solution with plasma colloid albumin was therefore investigated. After reperfusion, intracoronary adhesion of polymorphonuclear granulocytes, edema formation, left and right heart performance of pressure-to-volume work, and glycocalyx shedding were assessed.
Intracoronary retention of leukocytes was doubled in the traditional group For the prevention of acute and chronic graft failure, the glycocalyx might represent a new target. Las variables cualitativas se compararon mediante Chi-cuadrado, y las cuantitativas mediante el test t de Student.
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Heart transplantation has been widely accepted as a therapy for end-stage heart failure. Mitigation of ischemia-reperfusion injury by inhibiting the apoptotic process plays an important role in organ transplantation. Desiccation using high-pressure carbon monoxide CO is a new method of preserving donor hearts; however, its mechanism of antiapoptosis remains unclear. This study was intended to elucidate the efficacy and mechanism of preservation by desiccation for 18 hours using high-pressure CO on myocardial apoptosis.
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Rabbit heterotopic abdominal cardiac transplantation models were established. New Zealand rabbits were divided randomly into 3 groups: The donor hearts of the naive group were transplanted immediately after being extracted.
Apoptotic cardiomyocytes were detected using TUNEL technique and histopathology was performed by hematoxylin-eosin staining. Cold preservation with hyperbranched polyglycerol-based solution improves kidney functional recovery with less injury at reperfusion in rats. Minimizing donor organ injury during cold preservation including cold perfusion and storage is the first step to prevent transplant failure.
We recently reported the advantages of hyperbranched polyglycerol HPG as a novel substitute for hydroxyethyl starch in UW solution for both cold heart preservation and cold kidney perfusion. This study evaluated the functional recovery of the kidney at reperfusion after cold preservation with HPG solution.
The kidney protection by HPG solution was tested in a rat model of cold kidney ischemia-reperfusion injury, and was evaluated by histology and kidney function. In rat model of cold ischemia-reperfusion injury, the kidneys perfused and subsequently stored 1-hour with cold HPG solution showed less leukocyte infiltration, less tubular damage and better kidney function lower levels of serum creatinine and blood urea nitrogen at 48 h of reperfusion than those treated with UW or HTK solution.
In conclusion, our data show the superiority of HPG solution to UW or HTK solution in the cold perfusion and storage of rat kidneys, suggesting that the HPG solution may be a promising candidate for improved donor kidney preservation prior to transplantation. Occurance of apoptosis during ischemia in porcine pancreas islet cells. Pancreas islet transplantation is a potential treatment of diabetes mellitus and porcine organs provide an easily available source of cells.destrymegcoo.ml
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Unfortunately quality and quantity of isolated islets are still not satisfactory. Apoptosis occurs in freshly isolated islets and plays a significant role in early graft loss. We evaluated the influence of four storage solutions on porcine pancreas islets. After warm ischemia of minutes 12 organs were stored in 4 cold preservation solutions: Apoptotic cells were counted on hematocylin-eosin stainings.
Most apoptotic cells were found in organs stored in R. Low numbers were found in the other groups. Cold and warm ischemia of the pancreas seems to induce apoptosis in islet cells.
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Preservation solutions cause less apoptosis than electrolyte solution. No significant differences could be found among the preservation solutions. Universal and measurable entanglement entropy in the spin-boson model. We study the entanglement between a qubit and its environment from the spin-boson model with Ohmic dissipation. Through a mapping to the anisotropic Kondo model, we derive the entropy of entanglement of the spin E alpha,Delta,h , where alpha is the dissipation strength, Delta is the tunneling amplitude between qubit states, and h is the level asymmetry.
For a given h, the maximum entanglement occurs at a value of alpha which lies in the crossover regime h approximately TK. We emphasize the possibility of measuring this entanglement using charge qubits subject to electromagnetic noise.
Correction of glucocerebrosidase deficiency after retroviral-mediated gene transfer into hematopoietic progenitor cells from patients with Gaucher disease. Retroviral gene transfer has been used successfully to correct the glucocerebrosidase GCase deficiency in primary hematopoietic cells from patients with Gaucher disease. NTG normalized GCase activity in transduced Gaucher fibroblasts and efficiently infected human monocytic and erythroleukemic cell lines.
Furthermore, NTG efficiently infected human hematopoietic progenitor cells. Editorial Reviews. About the Author. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like. Detection of the provirus in approximately one-third of NTG-infected progenitor colonies that had not been selected in Gcontaining medium indicates that relative resistance to G underestimated the actual gene transfer efficiency. NTG-transduced hematopoietic progenitor cells from patients with Gaucher disease generated progeny in which GCase activity has been normalized.
The effect of a hydrogen sulfide releasing molecule Na2S on the cold storage of livers from cardiac dead donor rats. A study in an ex vivo model. Liver transplantation is currently the preferred treatment option for end-stage liver disease. Donation after cardiac death was a common practice in the early years of organ donation before brain death criteria were established. In the present, shortage of brain dead donors has led to the reassessment of organ donation after cardiac death. Therefore, to establish a rat model of donation post-cardiac arrest and using this approach to judge H2S delivery effects on graft hypothermic preservation, were the main objectives of this investigation.
After 24 h of hypothermic preservation, livers were rewarmed in an ex vivo model. Three experimental groups were established as follows: Data suggest that after 45 min of warm ischemia, viability parameters assessed during reperfusion in the ex vivo model were significantly impaired. On the other hand, warm ischemic livers exposed to H2S during cold storage, improved.
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