Nicolas Weiss is Full Professor of Therapeutics & Intensive Care Medicine at Sorbonne University, one of the oldest French university founded in 1257, Paris, France. Board certified in neurology and intensive care medicine, he performs his medical activity in the Neurological intensive care unit at La Pitié-Salpêtrière Hospital, a tertiary care center in center of Paris. He performed his PhD under the supervision of Dr PO Couraud at Cochin Institute, Paris, by unrevealing the molecular mechanism of neural stem cells trans-endothelial migration through the blood-brain barrier. His research is dedicated to the blood-brain barrier and its implication in acute brain injuries. In 2012, he founded with Pr Dominique Thabut the Brain Liver Pitié-Salpêtrière (BLIPS) study group in order to better characterize neurological complications of liver diseases and especially hepatic encephalopathy. Member of the French Intensive Care Society, the European Society of Intensive Care Medicine and the Neurocritical Care Society, he is also associated-editor for Annals of Intensive Care and part of the editorial board of Journal of Intensive Medicine. In the last years, he published with Pr Dominique Thabut several papers on hepatic encephalopathy and the possible implication of the blood-brain barriers in its pathophysiology (https://orcid.org/0000-0001-5155-196X). @nic_weiss @BrainLIverPS