Zusammenfassung
Durch die Langzeitbehandlung der chronischen Hepatitis B mit Nukleos(t)idanaloga (NA) kann der Progress dieser chronischen Lebererkrankung effektiv verhindert, in vielen Fällen auch eine Regression der Fibrosestadiums erreicht und das Risiko der Entwicklung eines hepatozellulären Karzinoms (HCC) deutlich gesenkt werden. Etablierter Endpunkt der NA-Therapie ist das Erreichen eines HBsAg(„hepatitis B surface antigen“)-Verlustes (sog. funktionelle Heilung). Ein weiterer, in internationalen Leitlinien akzeptierter Endpunkt ist die HBeAg(„hepatitis B early antigen“)-Serokonversion bei zum Therapiebeginn HBeAg-positiven Patienten. Reaktivierungen der Krankheitsaktivität sowie HBeAg-Seroreversionen können jedoch, trotz einer 12-monatigen Konsolidierungsbehandlung, bei bis zu 50 % dieser Patienten im Verlauf nach Absetzen der NA-Behandlung auftreten. Bei Patienten mit kompensierter Leberzirrhose soll die Therapie ausschließlich bei Erreichen einer funktionellen Heilung beendet werden. Das Beenden der Langzeit-NA-Therapie bei Patienten mit HBeAg-negativer Hepatitis B vor Eintreten des HBsAg-Verlustes ist ein neues und umstrittenes Konzept, da es nach Absetzen der NA regelhaft zu einem Widerauftreten der HBV-Replikation kommt. Es hat sich jedoch gezeigt, dass es in Folge der HBV-Reaktivierung bei bis zu 30 % der Patienten zu einer funktionellen Heilung kommt sowie bei bis zu 50 % der Patienten zu einem Übergang in eine inaktive Phase ohne weitere Therapieindikation. Unter engmaschiger Kontrolle der Hepatitis-B-Virus-DNA und der Transaminasen und rechtzeitiger Retherapie im Falle eines schweren biochemischen Flares ist dieses auch als Autovakzinierung bezeichnete Konzept der relapsinduzierten funktionellen Heilung sicher anwendbar.
Abstract
Long-term treatment of chronic hepatitis B with nucleos(t)ide analogues (NA) can effectively prevent the progression of this chronic liver disease, in many cases also achieve regression of the fibrosis stage and significantly reduce the risk of developing hepatocellular carcinoma (HCC). The established endpoint of NA treatment is the achievement of loss of the hepatitis B surface antigen (HBsAg, a so-called functional cure). Another endpoint accepted in international guidelines is seroconversion of hepatitis B early antigen (HBeAg) in patients positive for HBeAg at the start of treatment; however, reactivation of disease activity as well as HBeAg seroreversion can occur in up to 50% of these patients after discontinuation of NA treatment, despite 12 months of consolidation treatment. In patients with compensated liver cirrhosis, treatment should only be discontinued when functional recovery is achieved. Stopping long-term NA treatment in patients with HBeAg-negative hepatitis B before HBsAg loss occurs is a new and controversial concept as hepatitis B virus (HBV) replication usually reoccurs after stopping NA; however, it has been shown that HBV reactivation leads to functional recovery in up to 30% of patients and to a transition to an inactive phase without further indications for treatment in up to 50% of patients. Under close monitoring of HBV DNA and transaminases and timely retreatment in cases of severe biochemical flares, this relapse-induced functional cure, a concept also known as autovaccination, can be safely applied.
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Heiner Wedemeyer, Hannover
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van Bömmel, F., Berg, T. Hepatitis B: Wann ist eine Beendigung der Therapie mit Nukleos(t)idanaloga gerechtfertigt?. Gastroenterologe 16, 417–432 (2021). https://doi.org/10.1007/s11377-021-00572-w
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DOI: https://doi.org/10.1007/s11377-021-00572-w