Solid organ transplantation is an established treatment modality in patients with end-stage organ damage in cases where other therapeutic options fail. The long-term outcomes of solid organ transplant recipients have improved considerably since the introduction of the first calcineurin inhibitor (CNI) - cyclosporine. In 1984, the potent immunosuppressive properties of another CNI, tacrolimus, were discovered. The immunosuppressive effects of CNIs result from the inhibition of interleukin-2 synthesis and reduced proliferation of T cells due to calcineurin blockade. The considerable side effects that are associated with CNIs therapy include arterial hypertension and nephrotoxicity. The focus of this article was to review the available literature on the pathophysiological mechanisms of CNIs that induce chronic nephrotoxicity and arterial hypertension. CNIs lead to activation of the major vasoconstriction systems, such as the reninangiotensin and endothelin systems, and increase sympathetic nerve activity. On the other hand, CNIs are known to inhibit NO synthesis and NO-mediated vasodilation and to increase free radical formation. Altogether, these processes cause endothelial dysfunction and contribute to the impairment of organ function. A better insight into the mechanisms underlying CNI nephrotoxicity could assist in developing more targeted therapies of arterial hypertension or preventing CNI nephrotoxicity in organ transplant recipients, including heart transplantation., L. Hošková, I. Málek, L. Kopkan, J. Kautzner., and Obsahuje bibliografii
Úvod: Infekčná endokarditída u pacienta po transplantácii obličky je závažná infekčná komplikácia, ktorá zvyšuje riziko straty štepu ako aj mortalitu pacientov. Najdôležitejším predisponujúcim faktorom je imunosupresívna liečba – predovšetkým indukčná imunosupresia. Materiál a popis prípadu: V transplantačnom centre Martin podstúpilo v období 12 rokov transplantáciu obličky 250 pacientov. Z tohto súboru pacientov bolo 5 pacientov (2 %) po náhrade chlopne. Prezentujeme prípad pacienta po transplantácii obličky s rozvojom endokarditídy bioprotézy aortálnej chlopne mesiac po úspešnej transplantácii obličky. Diagnostika endokarditídy štandardnými postupmi (transtorakálne echokardiografické vyšetrenie, transezofageálne echokardiografické vyšetrenie, hemokultúry) bola neúspešná. Endokarditídu sme diagnostikovali raritne až pomocou PET-CT vyšetrenia s následnou zmenou antibiotickej liečby a úspešným zvládnutím tejto potransplantačnej komplikácie. Záver: Endokarditída po transplantácii obličky je vážna komplikácia, ktorá výrazne zhoršuje mortalitu príjemcov. Riziko rozvoja infekčnej endokarditídy po transplantácii zvyšuje aj indukcia, a to predovšetkým antitymocytárny globulín. Diagnostika iba pomocou PET-CT vyšetrenia je raritná, ale v prípade nášho popísaného prípadu, zásadne zmenila prístup k pacientovi a viedla k úspešnej liečbe. Kľúčové slová: endokarditída – indukcia – PET-CT – transplantácia obličky, Introduction: Infective endocarditis in a patient after kidney transplantation is a serious infective complication which increases the risk of loss of the graft and also the mortality of patients. The most important predisposing factor is the immunosuppressive therapy – mainly induction immunosuppression. Material and case description: 250 patients underwent kidney transplantation throughout the period of 12 years in the Transplant Center Martin. This set of patients included 5 patients (2 %) after heart valve replacement. We present the case of a patient after kidney transplantation with development of endocarditis of the bioprosthesis of the aortic valve one month after successful kidney transplantation. Diagnostics of endocarditis by standard procedures (examination by transthoracic echocardiogram, transesophageal echocardiography, hemocultures) was unsuccessful. We rarely diagnosed endocarditis only by PET-CT examination with a consequent change of the antibiotic treatment and successful managing of this post-transplant complication. Conclusion: Endocarditis after kidney transplantation is a serious complication which significantly worsens the mortality of patients. The risk of development of infective endocarditis after transplantation is also increased by induction, mainly by antithymocyte globulin. Diagnostics only by PET-CT examination is rare; however, in this case it fundamentally changed the approach to the patient and led to a successful treatment. Key words: endocarditis – induction – kidney transplantation – PET-CT, and Ivana Dedinská, Petra Skalová, Michal Mokáň, Katarína Martiaková, Denisa Osinová, Miroslav Pindura, Blažej Palkoci, Marián Vojtko, Janka Hubová, Denisa Kadlecová, Ivona Lendová, Radovan Zacharovský, Filip Pekar, Lucia Kaliská