Immune response, phenotyping and molecular graft surveillance in kidney transplant recipients following severe acute respiratory syndrome coronavirus 2 vaccination.

BACKGROUND: Understanding immunogenicity and alloimmune risk following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination in kidney transplant recipients is imperative to understanding the correlates of protection and to inform clinical guidelines. METHODS: We studied 50 kidney transplant recipients following SARS-CoV-2 vaccination and quantified their anti-spike protein antibody, donor-derived cell-free DNA (dd-cfDNA), gene expression profiling (GEP), and alloantibody formation. RESULTS: Participants were stratified using nucleocapsid testing as either SARS-CoV-2-naïve or experienced prior to vaccination. One of 34 (3%) SARS-CoV-2 naïve participants developed anti-spike protein antibodies. In contrast, the odds ratio for the association of a prior history of SARS-CoV-2 infection with vaccine response was 18.3 (95% confidence interval 3.2, 105.0, p < 0.01). Pre- and post-vaccination levels did not change for median dd-cfDNA (0.23% vs. 0.21% respectively, p = 0.13), GEP scores (9.85 vs. 10.4 respectively, p = 0.45), calculated panel reactive antibody, de-novo donor specific antibody status, or estimated glomerular filtration rate. CONCLUSIONS: SARS-CoV-2 vaccines do not appear to trigger alloimmunity in kidney transplant recipients. The degree of vaccine immunogenicity was associated most strongly with a prior history of SARS-CoV-2 infection.

Outpatient management of kidney transplant recipients with suspected COVID-19-Single-center experience during the New York City surge.

Data describing the clinical progression of coronavirus disease 2019 (COVID-19) in transplant recipients are limited. In New York City during the surge in COVID-19 cases, a systematic approach to monitoring and triaging immunocompromised transplant patients was required in the context of strained healthcare resources, limited outpatient testing, and heightened hospital exposure risks. Public health guidance at the onset of the COVID-19 outbreak recommended outpatient monitoring of mildly symptomatic patients without specific recommendations for special populations such as transplant recipients. We developed and implemented a systematic monitoring algorithm for kidney transplant recipients at our transplant center who reported mild symptoms suggestive of COVID-19. We describe the outcomes of the first 44 patients monitored through this algorithm. A total of 44 kidney transplant recipients thought to be symptomatic for COVID-19 disease were followed for a minimum of 14 days. The majority of mildly symptomatic patients (34/44) had clinical progression of disease and were referred to the emergency department where they all tested PCR positive and required hospitalization. More than half of these patients presented with hypoxia requiring supplemental oxygen, 39% were intubated within 48 hours, and 53% developed acute kidney injury but did not require dialysis. There were 6 deaths. During surge outbreaks, kidney transplant patients with even mild symptoms have a high likelihood of COVID-19 disease and most will worsen requiring hospitalization for supportive measures. Earlier outpatient testing and hospitalization may improve COVID-19 outcomes among transplant recipients.

Getting used to being a patient: the postoperative experience of living liver transplant donors.

CONTEXT: Living donor liver transplant is a viable option for eligible persons in need of a liver transplant, but little is known about the hospitalization experience of patients undergoing hepatectomy for transplant donation. OBJECTIVE: To explore the hospital experience of patients recovering from donor hepatectomy. DESIGN: A qualitative interpretive descriptive design was used to understand the hospital experience of patients recovering from donor hepatectomy. Semistructured interviews, conducted before discharge, were audiotaped and transcribed verbatim. Coding was performed independently, then jointly by investigators to reach consensus on emerging themes. Setting-Major university hospital in the Northeastern United States. Sample-Adults (>18 years of age) whose primary language was English or Spanish and who could provide written informed consent. RESULTS: The sample consisted of 15 participants who had a mean age of 34.6 years; half were women. Most were white and college educated. The relationship of the donors to recipients varied from immediate family to altruistic donors. "Getting used to being a patient" was the major theme that captured the patients' postoperative experience. Four subthemes explained the experience: regaining consciousness, all those tubes, expecting horrible pain, and feeling special and cared for. These were described in the context of an "amazing and impressive" transplant team. CONCLUSION: As healthy donors are getting used to being patients, these results provide clinicians with a deeper understanding of the transplant experience from the donor's perspective so that care can be tailored to meet their unique needs.

Racial and ethnic disparities in access to and utilization of living donor liver transplants.

Living donor liver transplantation (LDLT) is a comparable alternative to deceased donor liver transplantation and can mitigate the risk of dying while waiting for transplant. Although evidence exists of decreased utilization of living donor kidney transplants among racial minorities, little is known about access to LDLT among racial/ethnic minorities. We used Organ Procurement and Transplantation Network/United Network for Organ Sharing data from February 27, 2002 to June 4, 2014 from all adult liver transplant recipients at LDLT-capable transplant centers to evaluate differential utilization of LDLTs based on race/ethnicity. We then used data from 2 major urban transplant centers to analyze donor inquiries and donor rule-outs based on racial/ethnic determination. Nationally, of 35,401 total liver transplant recipients performed at a LDLT-performing transplant center, 2171 (6.1%) received a LDLT. In multivariate generalized estimating equation models, racial/ethnic minorities were significantly less likely to receive LDLTs when compared to white patients. For cholestatic liver disease, the odds ratios of receiving LDLT based on racial/ethnic group for African American, Hispanic, and Asian patients compared to white patients were 0.35 (95% CI, 0.20-0.60), 0.58 (95% CI, 0.34-0.99), and 0.11 (95% CI, 0.02-0.55), respectively. For noncholestatic liver disease, the odds ratios by racial/ethnic group were 0.53 (95% CI, 0.40-0.71), 0.78 (95% CI, 0.64-0.94), and 0.45 (95% CI, 0.33-0.60) respectively. Transplant center-specific data demonstrated that African American patients received fewer per-patient donation inquiries than white patients, whereas fewer African American potential donors were ruled out for obesity. In conclusion, racial/ethnic minorities receive a disproportionately low percentage of LDLTs, due in part to fewer initial inquiries by potential donors. This represents a major inequality in access to a vital health care resource and demands outreach to both patients and potential donors.

Liver transplantation at Yale-New Haven Transplantation Center.

It is possible to achieve better results after liver transplantation in adult and pediatric patients. An approach driven by multidisciplinary protocol is the most important factor, along with excellent communication skills, technical expertise, application of new technologies such as MARS and Arctic-Sun for ALF, and new knowledge/treatment protocols such as escalating-dose interferon ribavirin treatment, protocol biopsies, routine use of IL28B gene mutation and new protease inhibitors as part of antiviral therapy for hepatitis C.