Solid organ transplantation from COVID positive donors in the United States: Analysis of United Network for Organ Sharing database

EASL Clinical Practice Guidelines on liver transplantation

Liver transplantation (LT) is an established life-saving procedure. The field of LT has changed in the past 10 years from several perspectives, with the expansion of indications, transplantation of patients with acute-on-chronic liver failure, evolution of transplant oncology, the use of donations after cardiac death, new surgical techniques, and prioritisation of recipients on the waiting list. In addition, the advent of organ perfusion machines, the recognition of new forms of rejection, and the attention paid to the transition from paediatric to adult patients, have all improved the management of LT recipients. The purpose of the EASL guidelines presented here is not to cover all aspects of LT but to focus on developments since the previous EASL guidelines published in 2016.

The Effects of COVID-19 in Kidney Transplantation: Evidence From Tissue Pathology

BACKGROUND

The biological effects of SARS-CoV-2 infection in transplanted kidneys are uncertain with little pathological information.

METHODS

This single-center, prospective observational study evaluated kidney transplant biopsies from recipients of deceased donors with COVID-19, current recipients contracting SARS-CoV-2 Omicron variant in 2022, against prior BK virus (BKV) infection and uninfected (without SARS-CoV-2 or BKV) samples, as respective positive and negative comparators (n = 503 samples).

RESULTS

We demonstrated nonvirus tubular injury in implanted tissue from infected donors and prevalent recipients with mild acute COVID-19 and acute kidney injury, excluding direct viral infection as a cause of kidney damage. COVID particles were absent in 4116 ultrastructural images of 295 renal tubules from 4 patients with acute COVID-19. No viral cytopathic effect, viral allograft nephropathy, or SARS-CoV-2 RNA was detected in acute tissues, nor in 128 sequential samples from infected donors or recipients with COVID-19. Following recipient COVID-19 (mean 16.8 ± 12.0 wk post-infection), the biopsy-prevalence of rejection was 33.0% (n = 100 biopsies) versus 13.4% for contemporaneous uninfected controls (n = 337; P < 0.001). Prior COVID-19 was an independent risk factor for incident rejection using multivariable generalized estimating equation adjusted for competing risks (odds ratio, 2.195; 95% confidence interval, 1.189-4.052; P = 0.012). Landmark and matched-pair analyses confirmed an association of SARS-CoV-2 with subsequent transplant rejection, with a similar pattern following BKV infection.

CONCLUSIONS

Transplantation from COVID-19+ deceased donors yielded good recipient outcomes without evidence of viral tissue transmission. Acute kidney injury during COVID-19 was mediated by archetypical tubular injury and infection correlated with an increased risk of subsequent rejection.

Chronological and Geographical Variations in the Incidence and Acceptance of COVID-19-Positive Donors and Outcomes Among Abdominal Transplant Patients

INTRODUCTION

Given the importance of understanding COVID-19-positive donor incidence and acceptance, we characterize chronological and geographic variations in COVID-19 incidence relative to COVID-19-positive donor acceptance.

METHODS

Data on deceased donors and recipients of liver and kidney transplants were obtained from the UNOS database between 2020 and 2023. Hierarchical cluster analysis was used to assess trends in COVID-19-positive donor incidence. Posttransplant graft and patient survival were assessed using Kaplan-Meier curves.

RESULTS

From among 38 429 deceased donors, 1517 were COVID-19 positive. Fewer kidneys (72.4% vs. 76.5%, p < 0.001) and livers (56.4% vs. 62.0%, p < 0.001) were used from COVID-19-positive donors versus COVID-19-negative donors. Areas characterized by steadily increased COVID-19 donor incidence exhibit the highest transplantation acceptance rates (92.33%), followed by intermediate (84.62%) and rapidly increased (80.00%) COVID-19 incidence areas (p = 0.016). Posttransplant graft and patient survival was comparable among recipients, irrespective of donor COVID-19 status.

CONCLUSIONS

Regions experiencing heightened rates of COVID-19-positive donors are associated with decreased acceptance of liver and kidney transplantation. Similar graft and patient survival is noted among recipients, irrespective of donor COVID-19 status. These findings emphasize the need for adaptive practices and unified medical consensus in navigating a dynamic pandemic.

Early outcomes of lung transplantation with lung allografts from coronavirus disease 2019 (COVID-19)-positive donors

OBJECTIVE

Coronavirus disease 2019 (COVID-19) can be detected for extended periods of time with nucleic acid amplification test even after transmissibility becomes negligible. Lung allografts from COVID-19-positive donors have been used for transplantation in highly selected cases. This study aimed to clarify the early outcomes of lung transplantation with COVID-19-positive donors.

METHODS

The Organ Procurement and Transplantation Network/United Network for Organ Sharing database between April 2020 and June 2022 was retrospectively analyzed.

RESULTS

In the study period, 1297 COVID-19-positive donors were identified and the lungs were transplanted from 47 donors (3.6%). Of 47 donors, 44 donors were positive for COVID-19 NAT with nasopharyngeal swabs and the other 3 were positive with bronchoalveolar lavage. The COVID-19-positive lung donors were younger than the COVID-19-negative donors (28.4 ± 11.6 years vs 35.4 ± 13.6 years, P < .001). Recipients of the COVID-19-positive lungs (n = 47) were more likely have a greater lung allocation score (57.1 ± 22.9 vs 50.5 ± 19.7, P = .057) than recipients of COVID-19-negative lungs (n = 5501). The posttransplant length of hospital stay (39.8 ± 43.6 days vs 30.6 ± 34.5 days, P = .181), need for extracorporeal membrane oxygenation support at 72 hours after transplantation (2.6% [1/38] vs 10.4% [541/5184], P = .18), and 1-year overall survival rate (85.6% vs 87.1%, P = .63) were comparable between the 2 groups.

CONCLUSIONS

Carefully selected lung allografts from COVID-19-positive donors had comparable early posttransplant outcomes to lung allografts from COVID-19-negative donors.

Single-center Outcomes After Liver Transplantation With SARS-CoV-2-Positive Donors: An Argument for Increased Utilization

Background

The COVID-19 pandemic has led to an increase in SARS-CoV-2-test positive potential organ donors. The benefits of life-saving liver transplantation (LT) must be balanced against the potential risk of donor-derived viral transmission. Although emerging evidence suggests that the use of COVID-19-positive donor organs may be safe, granular series thoroughly evaluating safety are still needed. Results of 29 consecutive LTs from COVID-19-positive donors at a single center are presented here.

Methods

A retrospective cohort study of LT recipients between April 2020 and December 2022 was conducted. Differences between recipients of COVID-19-positive (n = 29 total; 25 index, 4 redo) and COVID-19-negative (n = 472 total; 454 index, 18 redo) deceased donor liver grafts were compared.

Results

COVID-19-positive donors were significantly younger (P = 0.04) and had lower kidney donor profile indices (P = 0.04) than COVID-19-negative donors. Recipients of COVID-19-positive donor grafts were older (P = 0.04) but otherwise similar to recipients of negative donors. Donor SARS-CoV-2 infection status was not associated with a overall survival of recipients (hazard ratio, 1.11; 95% confidence interval, 0.24-5.04; P = 0.89). There were 3 deaths among recipients of liver grafts from COVID-19-positive donors. No death seemed virally mediated because there was no qualitative association with peri-LT antispike antibody titers, post-LT prophylaxis, or SARS-CoV-2 variants.

Conclusions

The utilization of liver grafts from COVID-19-positive donors was not associated with a decreased overall survival of recipients. There was no suggestion of viral transmission from donor to recipient. The results from this large single-center study suggest that COVID-19-positive donors may be used safely to expand the deceased donor pool.

COVID-19 in organ donors: An organ procurement organization perspective

BACKGROUND

The COVID-19 pandemic presented a significant challenge for Organ Procurement Organizations (OPOs) with the use of SARS-CoV-2 positive donors varying widely. This study used detailed single OPO data to determine the success of using SARS-CoV-2 positive donors.

METHODS

We performed a retrospective cohort study including all SARS-CoV-2 positive donors referred to the Gift of Life OPO from January 1, 2021, to June 30, 2023. Descriptive analyses were performed to characterize referral and organ utilization.

RESULTS

There were 861 organ referrals with 1 positive SARS-Cov-2 test: 282 were ruled out with telephone evaluation, 431 referrals were ruled out with onsite evaluation ("evaluated nondonors") and 148 became donors. For donors who had both nasopharyngeal and lower respiratory testing completed, there was notable result discordance observed. Median cycle threshold (Ct) values were similar between donors and evaluated nondonors with no change in median donor Ct values over the study period. Transplanted organs from COVID-positive donors included 27 hearts, 88 livers, 5 pancreata, and 107 kidneys; no lung donation occurred. The proportion of COVID-positive donors significantly increased over the study period.

CONCLUSION

This large volume donor referral study demonstrates increasing COVID-19 referrals progressing to donation over time, supporting the increased use of these donors for nonlung transplantation.

Coronavirus Disease 2019 (COVID-19) in Heart Transplant Recipients and Anti-SARS-CoV-2 Monoclonal Antibodies: Experience, Lessons Learnt, and Future Challenges

Solid organ transplant recipients (SOTRs), including heart transplant (HT) recipients, infected with Coronavirus disease 2019 (COVID-19) are at higher risk of hospitalization, mechanical ventilation, or death when compared with general population. Advances in diagnosis and treatment of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection have reduced COVID-19-related mortality rates from ~30% in the early pandemic to <3% in 2022 among HT recipients. We performed a retrospective chart review including adult HT recipients at Westchester Medical Center from January 1, 2020 to December 10, 2022, who received anti-SARS-CoV-2 monoclonal antibodies (mAbs) for treatment of mild-to-moderate COVID-19, and those who received tixagevimab/cilgavimab for preexposure prophylaxis. Additionally, a comprehensive review of the literature involving SOTRs who received mAbs for COVID-19 was conducted. In this largest single-center study in this population, 42 adult HT recipients received casirivimab/imdevimab (36%), sotrovimab (31%), or bebtelovimab (29%) for treatment of mild-to-moderate COVID-19. Among these recipients, no infusion-associated adverse effects, progression of disease, COVID-19-associated hospitalizations, or death were noted. Preexposure prophylaxis with tixagevimab/cilgavimab was given to 63 HT recipients in a dedicated infusion center (40%), inpatient setting (33%), or at time of annual heart biopsy (27%). No immediate adverse events were noted. There were 11 breakthrough infections, all mild. Overall, the data suggests that HT recipients receiving mAbs have reduced rates of hospitalization, need for intensive care unit care, or death. Use of anti-SARS-CoV-2 mAbs in SOTRs is resource intensive and requires a programmatic team approach for optimal administration and to minimize any risk of disparities in their use.

Heart transplantation: advances in expanding the donor pool and xenotransplantation

Approximately 65 million adults globally have heart failure, and the prevalence is expected to increase substantially with ageing populations. Despite advances in pharmacological and device therapy of heart failure, long-term morbidity and mortality remain high. Many patients progress to advanced heart failure and develop persistently severe symptoms. Heart transplantation remains the gold-standard therapy to improve the quality of life, functional status and survival of these patients. However, there is a large imbalance between the supply of organs and the demand for heart transplants. Therefore, expanding the donor pool is essential to reduce mortality while on the waiting list and improve clinical outcomes in this patient population. A shift has occurred to consider the use of organs from donors with hepatitis C virus, HIV or SARS-CoV-2 infection. Other advances in this field have also expanded the donor pool, including opt-out donation policies, organ donation after circulatory death and xenotransplantation. We provide a comprehensive overview of these various novel strategies, provide objective data on their safety and efficacy, and discuss some of the unresolved issues and controversies of each approach.

Comparison of Short-Term Outcomes in Kidney Transplant Recipients from SARS-CoV-2-Infected versus Noninfected Deceased Donors

BACKGROUND

Acceptable post-transplant outcomes were reported in kidney transplant recipients from donors with coronavirus disease 2019 (COVID-19); however, there are no comparative studies with well-matched controls.

METHODS

This multicenter, prospective observational study, which included three transplant centers in the United States, enrolled 61 kidney recipients from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-infected deceased donors. Using optimal matching methods, we matched every recipient to three comparators receiving kidneys from SARS-CoV-2-negative deceased donors with otherwise highly similar characteristics in the same transplant centers to compare 6-month eGFR.

RESULTS

Among recipients of SARS-CoV-2-infected donor kidneys, one recipient died with a functional graft within 6 months. Mean 6-month eGFR was not significantly different between SARS-CoV-2-infected and noninfected donor groups (55±21 and 57±25 ml/min per 1.73 m 2 , respectively; P = 0.61). Six-month eGFR in recipients from SARS-CoV-2-infected donors who died of reasons other than COVID-19 was not significantly different from those from SARS-CoV-2-negative donors (58±22 and 56±25 ml/min per 1.73 m 2 , respectively; P = 0.51). However, recipients from donors who died of COVID-19 had significantly lower 6-month eGFR than those from SARS-CoV-2-negative donors (46±17 and 58±27 ml/min per 1.73 m 2 , respectively; P = 0.03). No donor-to-recipient SARS-CoV-2 transmission was observed.

CONCLUSIONS

Six-month eGFR was not significantly different between recipients of kidneys from SARS-CoV-2-infected and noninfected donors. However, those receiving kidneys from donors who died of COVID-19 had significantly lower 6-month eGFR. Donor-to-recipient SARS-CoV-2 transmission was not observed.

Non-Lung Solid Organ Transplantation From SARS-CoV-2-Positive Donors to Uninfected Recipients

BACKGROUND

There is a paucity of evidence on the risk of donor-recipient transmission of the SARS-CoV-2 in solid organ transplant recipients. Initial impressions suggest non-lung solid organs may be safely transplanted from SARS-CoV-2-positive donors without risk of viral transmission.

METHODS

We reviewed clinical results of transplants in which SARS-CoV-2-negative recipients received non-lung solid organs from SARS-CoV-2-positive donors at a single transplant center. No prisoners were used in this study, and participants were neither coerced nor paid. The manuscript was created in compliance with the Helsinki Congress and the Declaration of Istanbul.

RESULTS

Between June 2021 and January 2023, we transplanted 26 solid organs, including 13 kidneys, 8 livers, 3 hearts, and 1 simultaneous heart and kidney, from 23 SARS-CoV-2-positive donors into 25 SARS-CoV-2 negative recipients. Two of the recipients had a positive SARS-CoV-2 real-time polymerase chain reaction after transplantation, but otherwise, patients had no SARS-CoV-2-related complications, and all patients to date are alive with excellent allograft function.

CONCLUSION

Transplantation of non-lung solid organs from SARS-CoV-2-positive donors into uninfected recipients can be safely performed without adverse effects from SARS-CoV-2.

Recommendations for SARS-CoV-2 testing and organ procurement from deceased donors in the Republic of Korea

We present a summary of the evidence on testing for severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and organ procurement from deceased donors and provide recommendations based on current clinical data and the guidelines from major transplant organizations. Because of the limited historical experience with coronavirus disease 2019 (COVID-19), certain recommendations in this document are based on theoretical rationales rather than clinical data. The recommendations in this manuscript may be subject to revision as subsequent clinical studies provide definitive evidence regarding COVID-19 in organ procurement.

Solid organ graft-versus-host disease in a recipient of a COVID-19 positive liver graft

A 66-year-old male with end-stage liver disease (ESLD) secondary to non-alcoholic fatty liver disease (NAFLD), complicated by hepatocellular carcinoma (HCC), underwent deceased donor liver transplantation from a Coronavirus disease 2019 (COVID-19) positive donor. He presented a month later with fever, diarrhea and pancytopenia which led to hospitalization. The hospital course was notable for respiratory failure, attributed to invasive aspergillosis, as well as a diffuse rash. A bone marrow biopsy revealed hypocellular marrow without specific findings. In the following days, laboratory parameters raised concern for secondary hemophagocytic lymphohistiocytosis (HLH). Clinical concern also grew for solid organ transplant graft-versus-host-disease (SOT-GVHD) based on repeat marrow biopsy with elevated donor-derived CD3+ T cells on chimerism. After, a multidisciplinary discussion, the patient was started on ruxolitinib, in addition to high dose steroids, to address both SOT-GVHD and secondary HLH. Patient developed symptoms concerning for hemorrhagic stroke and was transitioned to comfort care. Although GVHD has been studied extensively in hematopoietic stem cell transplant (HSCT) patients, it is a rare entity in SOT with a lack of guidelines for management. Additionally, whether COVID-19 may play a role in development of SOT-GVDH has not been explored.