COVID-19 and hepatic damage: what we know?

INTRODUCTION: Since the end of 2019, a new disease outbreak has been spreading worldwide, after starting from Wuhan, China. The viral pathogen responsible for the disease was named as SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2), and for the illness the acronym COVID-19 was coined (COronaVIrus Disease 2019). Viral pathogenesis, epidemiology, and clinics are still somewhat obscure, when occurring during childhood the most. The aim of this study was to evaluate the features of liver involvement and damage in course of COVID-19. EVIDENCE ACQUISITION: An insight into what is known as to COVID-19 and hepatic damage in adulthood as well as pediatric age was given. All the most relevant papers up to 15/10/2020 were identified and discussed. An extensive search strategy was carried out to identify all paper published from December 1st, 2019, to September 5, 2020, combining the key words "coronavirus," "coronavirus infection," "SARS-CoV-2," "COVID-19," "liver," "liver injury," "hepatic injury," "children," "pediatric" in key electronic bibliographic databases (PubMed, Google Scholar), following the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) reporting guidelines. EVIDENCE SYNTHESIS: Establishing whether liver damage is due to a direct viral action or host immune system inflammatory reaction or consequence of the administered drugs or secondary to another organ failure (for example the heart) is difficult. What is sure is the fact that liver function should be checked at the time of admission to hospital and during hospitalization. CONCLUSIONS: In conclusion, liver involvement during COVID-19 is likely due to a multifactorial origin. An aberrant immune system reaction to SARS-CoV-2 is probably the most important underlying trigger, though more extended studies are needed for a definitive confirmation. The markers of liver injury should be carefully in each patient admitted for COVID-19: in fact, in case of altered hepatic markers, a specific therapy to protect liver is needed.