Background We aimed to determine whether serum soluble CD30 (sCD30) could identify recipients at high risk for unfavorable early and late kidney transplant outcomes. Methods Serum sCD30 was measured on the day of kidney transplantation and on the 4th day posttransplant. We assessed the value of these measurements in predicting delayed graft function, slow graft function (SGF), acute rejection (AR), pyelonephritis, decline of allograft function after 6 months, and graft and patient survival during 5 years of follow-up in 45 recipients. Results We found the association between low pretransplant serum levels of sCD30 and SGF. The absence of significant decrease of sCD30 on the 4th day posttransplant was characteristic for SGF, early AR (the 8th day–6 months), late AR (>6 months), and early pyelonephritis (the 8th day–2 months). Lower pretransplant and posttransplant sCD30 predicted worse allograft function at 6 months and 2 years, respectively. Higher pretransplant sCD30 was associated with higher frequency of early AR, and worse patients' survival, but only in the recipients of deceased-donor graft. Pretransplant sCD30 also allowed to differentiate patients with early pyelonephritis and early AR. Conclusions Peritransplant sCD30 is useful in identifying patients at risk for unfavorable early and late transplant outcomes.

Intraoperative biopsies are important in identifying patients at risk for worse graft function, especially concerning absence of gain of function early after transplant and loss of function late after transplant.

In recent years, there has been growing interest in the use of stem cells as a therapeutic agent for the restoration of the damaged tissues and organs. We present a clinical case. Male, 39 y.o. Diagnosis: Glomerulonephritis. On 10/09/2012, he underwent heterotopic renal allotransplantation from a live relative donor. On 09/23/2020, he was admitted to the hospital due to renal allograft pyelonephritis. On 10/28/2020, a cell based donor umbilical cord blood product was infused. Cell therapy enabled to minimize the consequences of the graft damage, to preserve the graft function and satisfactory condition of the recipient.