Corrigendum: Ex vivo normothermic preservation of a kidney graft from uncontrolled donation after circulatory death over 73 hours.

[This corrects the article DOI: 10.3389/fbioe.2023.1330043.].

Ex vivo normothermic preservation of a kidney graft from uncontrolled donation after circulatory death over 73 hours.

The transplant community is focused on prolonging the ex vivo preservation time of kidney grafts to allow for long-distance kidney graft transportation, assess the viability of marginal grafts, and optimize a platform for the translation of innovative therapeutics to clinical practice, especially those focused on cell and vector delivery to organ conditioning and reprogramming. We describe the first case of feasible preservation of a kidney from a donor after uncontrolled circulatory death over a 73-h period using normothermic perfusion and analyze hemodynamic, biochemical, histological, and transcriptomic parameters for inflammation and kidney injury. The mean pressure and flow values were 71.24 ± 9.62 mmHg and 99.65 ± 18.54 mL/min, respectively. The temperature range was 36.7°C-37.2°C. The renal resistance index was 0.75 ± 0.15 mmHg/mL/min. The mean pH was 7.29 ± 0.15. The lactate concentration peak increased until 213 mg/dL at 6 h, reaching normal values after 34 h of perfusion (8.92 mg/dL). The total urine output at the end of perfusion was 1.185 mL. Histological analysis revealed no significant increase in acute tubular necrosis (ATN) severity as perfusion progressed. The expression of KIM-1, VEGF, and TGFß decreased after 6-18 h of perfusion until 60 h in which the expression of these genes increased again together with the expression of ß-catenin, Ki67, and TIMP1. We show that normothermic perfusion can maintain a kidney graft viable ex vivo for 3 days, thus allowing a rapid translation of pre-clinical therapeutics to clinical practice.

Effect of Active and Early Possible Organ and Tissue Donor Detection in the Emergency Room in a University Hospital.

PURPOSE: The emergency room of the hospital is the gateway for patients with severe brain damage due to neurologic or cardiac conditions such as stroke or cardiac arrest. The main purpose is to design an active registry of patients, in the emergency room, to facilitate the detection and follow-up of potential donors according to their clinical evolution. MATERIAL AND METHODS: This is a 1-year prospective study from May 2017 to May 2018 with a register for detection of patients admitted to the emergency room with severe brain damage (Glasgow Coma Scale score ≤ 8), with active follow-up until hospital discharge, who might have died or otherwise become possible organ and tissue donors. RESULTS: One hundred sixty-six (107 men and 59 women) patients met the inclusion criteria: (1) 30.7% recovered from cardiac arrest; (2) 31.3% from stroke; (3) 16.9% from traumatic brain injury and multiple trauma; (4) 10.2% had decreased level of consciousness; (5) 4.8% had other cardiac conditions; and (6) 6.0% had other diagnoses. Seventy-seven out of 166 patients (46.4%) were evaluated as possible organ and tissue donors, with 37 out of 77 (48.0%) of the possible donors becoming real donors. This means that 37 out of 166 (22.3%) of the possible donors admitted to the emergency room became real donors. Twenty-two out of 77 of the patients (28.6%) evaluated had clinical contraindications for donation and in 18 out of 77 (23.4%), there was family refusal for any kind of organ or tissue donation. This record allowed the generation of the following organs and tissues: 4 hearts, 19 livers, 14 lungs, 52 kidneys, 2 pancreata, 29 corneas, 19 donations of bone allografts, 15 donations of skin tissue, 14 donations of valvular allografts, and 11 vascular allografts. CONCLUSIONS: The early and active possible donors registry at the emergency room has facilitated early detection and allow adequate follow-up and evaluation of possible organ and tissue donors.

[Optimising tissue donation process in a university hospital: 10 years of experience]. / Optimización del proceso de donación de tejidos en un hospital universitario: 10 años de experiencia.

BACKGROUND AND OBJECTIVE: The demand of tissue for transplants requires a continuous effort in detecting potential donors and assessing the causes of death. We aimed to assess the capacity to optimise tissue donation rates with the implementation of an active detection system of hospital deaths alongside a comprehensive assessment of the causes of death according to current international and local tissue banks' standards. MATERIAL AND METHOD: An early and pro-active detection programme of hospital deaths was implemented in 2002. The potential increase in donation was analysed according to modified criteria: age (80 to 85 years), acceptance of corneal phacoemulsification, autoimmune diseases, and sepsis reassessment. During the 2002-2011 decade, the criteria for absolute exclusion remained the same. The conversion rate from potential donors to actual donors of one or more tissue types was analysed. RESULTS: A total of 16.531 cases of cardiac arrest were analysed, and 11.191 of the cases fulfilled criteria of absolute exclusion. The modification of criteria led to an increase of potential donors: 10.4% age factor, 4.5% autoimmune diseases/phacoemulsification factor, 11.8% sepsis factor (P<.00). The study indicated a total increase of 16% (P<.00). A total of 2.371 successful donations were generated. The efficiency to generate donors increased from 11 to 21% during the aforementioned decade (P<.00). CONCLUSION: A pro-active detection system of hospital deaths combined with a continuous re-assessment of the acceptance criteria for each tissue type in the hospital setting leads to an increase in the potential donors' rate.