Der Einfluss von Immunsuppression und chronischen Nierenerkrankungen auf das Ansprechen auf COVID-19-Impfungen

Was ist neu?

Wie effektiv sind die zugelassenen Impfstoffe bei Nierenerkrankungen und Immunsupprimierten? Zahlreiche Beobachtungsstudien legen nahe, dass vor allem eine systemische Immunsuppression eine geringe oder fehlende Antikörperbildung bedingt. Auch Patienten mit fortgeschrittener chronischer Nierenerkrankung, insbesondere mit Dialysepflichtigkeit, ohne Einnahme systemischer Immunsuppressiva haben ein reduziertes humorales Ansprechen.

Ich habe eine COVID-19-Erkrankung durchgemacht. Ist für mich eine COVID-19-Impfung sinnvoll? Nach durchgemachter COVID-19-Erkrankung scheint auch für Nierenkranke eine Boosterung mit einem mRNA-Impfstoff sinnvoll zu sein.

Kann ich trotz laufender Immunsuppression geimpft werden? Für Patienten unter Immunsuppression ist das Ansprechen auf Impfstoffe reduziert. Dennoch sollten sie geimpft werden. Eine Anti-CD20-Therapie beeinträchtigt die humorale Immunantwort erheblich.

Besteht die Möglichkeit einer Abstoßungsreaktion meines Transplantats bzw. eines Rezidivs der Grunderkrankung? Im Zuge der globalen Impfanstrengungen erscheinen nun einzelne Berichte über Erstmanifestationen, Schübe oder Krankheitsrezidive über das Spektrum autoimmuner Nierenerkrankungen, die in zeitlichem Zusammenhang mit der Impfung stehen. Da die meisten Rezidive/Abstoßungen behandelbar sind, der Verlauf einer COVID-19-Erkrankung aber oftmals schwer bzw. tödlich ist, überwiegt der Nutzen die Risiken.

Habe ich eine dauerhafte Protektion nach erfolgter COVID-19-Impfung? Im Vergleich zur altersentsprechenden gesunden Population weist die nephrologische Patientengruppe nach Impfung deutlich niedrigere Titer auf, welche auch rascher abnehmen (vor allem Evidenz für Transplantierte und Dialyse). Eine frühzeitige Auffrischung sollte auch aufgrund der besorgniserregenden Virusvarianten und der reduzierten Wirksamkeit der Impfstoffe erwogen werden.

Nach der ersten Impfserie haben sich keine/kaum Antikörper nachweisen lassen. Gibt es Strategien, die Impfantwort zu verbessern? Viele Länder empfehlen eine 3. Impfdosis für vulnerable Populationen, v. a. auch wegen der reduzierten Antwort nach 2 Dosen bzw. auch des Risikos eines schweren Verlaufs einer COVID-19-Erkrankung. Der Einsatz einer Drittimpfung muss aber im Rahmen prospektiver klinischer Studien überprüft werden.

Abstract

How effective are the approved vaccines in kidney diseases and those receiving immunosuppression? Several observational studies indicated that immunosuppression is associated with a weakened or absent humoral response. Patients with chronic kidney diseases or undergoing maintenance dialysis without immunosuppression have a reduced humoral response to COVID-19 vaccines.

I had COVID-19. Should I get vaccinated? It is recommended to receive a booster after SARS-CoV-2 infection with a mRNA vaccine.

Is a COVID-19 vaccination despite ongoing immunosuppression possible? Patients receiving immunosuppression have a reduced humoral response, and this is especially observed when anti-CD20 therapy is used.

Is there a possibility that the vaccine provokes rejection of my transplanted kidney or relapse of my glomerular disease? Several reports were published in the last months highlighting new-onset diseases, recurrences and relapses of different glomerular diseases, which occurred after the receipt of the first or second vaccine dose. As a clear association of vaccines and induction of autoimmunity still needs to be established, most of these diseases are treatable, and COVID-19 in patients under immunosuppression is often fatal, there is a clear net benefit of vaccination.

Do I have a permanent protection after vaccination? The antibody titers and likely the cellular immune response is significantly reduced in patients with kidney diseases, and titers are reducing at a fast pace under ongoing immunosuppression. A booster dose should be considered, especially taking into consideration the evolvement of virus variants and their impact on vaccine efficacy.

After the first series of vaccination, no or only a marginal amount of antibodies were detectable. Are there strategies to improve vaccine response? Many countries recommend the application of a third dose for vulnerable patient cohorts, especially because of a weakened response and their risk to develop a severe disease course of COVID-19. Prospective clinical trials are ongoing to test the ideal strategy to improve vaccine response in these cohorts.

Schlüsselwörter

COVID-19 - SARS-CoV-2 - Impfung - Nierenerkrankungen - Immunsuppression

Key words

COVID-19 - SARS-CoV-2 - vaccination - kidney diseases - immunosuppression

Publication History

Article published online:
22 September 2021

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