PMID- 34531361 OWN - NLM STAT- MEDLINE DCOM- 20211028 LR - 20211204 IS - 2329-0358 (Electronic) IS - 1425-9524 (Print) IS - 1425-9524 (Linking) VI - 26 DP - 2021 Sep 17 TI - Immunological Results of Long-Term Use of Mammalian Target of Rapamycin (mTOR) Inhibitors and Its Effects on Renal Graft Functions. PG - e932434 LID - 10.12659/AOT.932434 [doi] AB - BACKGROUND Calcineurin inhibitor drugs (CNI), which are the basis of immunosuppression in kidney transplantation, contribute to renal graft loss, with increased morbidity and mortality due to their potentially harmful effects on the renal graft, cardiovascular system, and tumor pathology. For this reason, the mammalian target of rapamycin inhibitors (mTORi) such as sirolimus (SRL) and everolimus (EVE) has been preferred more frequently, as they are associated with fewer complications and longer graft function. MATERIAL AND METHODS We enrolled 89 adult renal transplant patients (37 patients on mTORi and 52 on CNI) who had similar age, sex, primary renal disease, dialysis type, post-transplant follow-up period, and donor type. We analyzed and compared the data between patients using mTORi for longer than 5 years and those using CNI regarding pre- and post-transplant panel reactive antibody (PRA), and donor-specific antibody (DSA), as well as post-transplantation and current graft functions. RESULTS Although those using mTORi for more than 5 years had significantly higher mismatch rates (P=0.024) than those using CNI, there was no significant change in PRA and DSA levels. Transplant time was longer in mTORi users (P=0.025). The switch time to mTORi in patients ranged from 0 to 19 years, but the average was 4 years. As expected, actual spot urine protein/creatinine was significantly higher in those using mTORi (P=0.009). Diabetes mellitus (DM) and BK virus nephropathy (BKVN) rates were significantly higher due to switching the regimen from CNI to mTORi. CONCLUSIONS Long-term use of mTORi does not appear to be an immunological problem. FAU - Tanrisev, Mehmet AU - Tanrisev M AD - Department of Nephrology, SBU Izmir Tepecik Training and Research Hospital, Izmir, Turkey. FAU - Ayna Kilicaslan, Tulay AU - Ayna Kilicaslan T AD - Department of Medical Biology and Tissue Typing Laboratory, SBU Izmir Tepecik Training and Research Hospital, Medical Faculty, Izmir Katip Celebi University, Izmir, Turkey. FAU - Colak, Hulya AU - Colak H AD - Department of Nephrology, SBU Izmir Tepecik Training and Research Hospital, Izmir, Turkey. FAU - Ersan, Sibel AU - Ersan S AD - Department of Nephrology, SBU Izmir Tepecik Training and Research Hospital, Izmir, Turkey. FAU - Yilmaz, Banu AU - Yilmaz B AD - Department of Nephrology, SBU Izmir Tepecik Training and Research Hospital, Izmir, Turkey. FAU - Alp, Alper AU - Alp A AD - Department of Nephrology, Medical Faculty, Mugla Sitki Kocman University, Mugla, Turkey. FAU - Tugmen, Cem AU - Tugmen C AD - Department of General Surgery, SBU Izmir Tepecik Training and Research Hospital, Izmir, Turkey. FAU - Sevgili, Bahar Engin AU - Sevgili BE AUID- ORCID: 0000-0001-5755-0132 AD - Department of Internal Medicine, SBU Izmir Tepecik Training and Research Hospital, Izmir, Turkey. LA - eng PT - Journal Article DEP - 20210917 PL - United States TA - Ann Transplant JT - Annals of transplantation JID - 9802544 RN - 0 (Calcineurin Inhibitors) RN - 0 (Immunosuppressive Agents) RN - 9HW64Q8G6G (Everolimus) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Adult MH - Calcineurin Inhibitors/adverse effects MH - Everolimus MH - Female MH - Graft Rejection/prevention & control MH - Humans MH - *Immunosuppressive Agents/adverse effects/therapeutic use MH - *Kidney Transplantation MH - Male MH - Middle Aged MH - Sirolimus MH - TOR Serine-Threonine Kinases/*antagonists & inhibitors PMC - PMC8454254 COIS- Conflict of Interest None declare. EDAT- 2021/09/18 06:00 MHDA- 2021/10/29 06:00 PMCR- 2021/09/17 CRDT- 2021/09/17 06:17 PHST- 2021/09/17 06:17 [entrez] PHST- 2021/09/18 06:00 [pubmed] PHST- 2021/10/29 06:00 [medline] PHST- 2021/09/17 00:00 [pmc-release] AID - 932434 [pii] AID - 10.12659/AOT.932434 [doi] PST - epublish SO - Ann Transplant. 2021 Sep 17;26:e932434. doi: 10.12659/AOT.932434.