UNIGE document Scientific Article
previous document  unige:19180  next document
add to browser collection
Title

Aggravation of viral hepatitis by platelet-derived serotonin

Authors
Lang, Philipp A.
Contaldo, Claudio
Georgiev, Panco
El-Badry, Ashraf Mohammad
Recher, Mike
Kurrer, Michael
Cervantes-Barragan, Luisa
Ludewig, Burkhard
show hidden authors show all authors [1 - 22]
Published in Nature Medicine. 2008, vol. 14, no. 7, p. 756-761
Abstract More than 500 million people worldwide are persistently infected with hepatitis B virus or hepatitis C virus. Although both viruses are poorly cytopathic, persistence of either virus carries a risk of chronic liver inflammation, potentially resulting in liver steatosis, liver cirrhosis, end-stage liver failure or hepatocellular carcinoma. Virus-specific T cells are a major determinant of the outcome of hepatitis, as they contribute to the early control of chronic hepatitis viruses, but they also mediate immunopathology during persistent virus infection. We have analyzed the role of platelet-derived vasoactive serotonin during virus-induced CD8(+) T cell-dependent immunopathological hepatitis in mice infected with the noncytopathic lymphocytic choriomeningitis virus. After virus infection, platelets were recruited to the liver, and their activation correlated with severely reduced sinusoidal microcirculation, delayed virus elimination and increased immunopathological liver cell damage. Lack of platelet-derived serotonin in serotonin-deficient mice normalized hepatic microcirculatory dysfunction, accelerated virus clearance in the liver and reduced CD8(+) T cell-dependent liver cell damage. In keeping with these observations, serotonin treatment of infected mice delayed entry of activated CD8(+) T cells into the liver, delayed virus control and aggravated immunopathological hepatitis. Thus, vasoactive serotonin supports virus persistence in the liver and aggravates virus-induced immunopathology.
Keywords AnimalsBlood Platelets/*chemistryCD8-Positive T-Lymphocytes/metabolismHalf-LifeHepatitis, Viral, Animal/immunology/*pathology/virologyLiver/blood supply/immunology/pathologyLymphocytic Choriomeningitis/*pathologyMiceMice, Inbred C57BLMice, KnockoutMicrocirculationPlatelet CountSerotonin/*deficiency/genetics/*metabolism
Identifiers
PMID: 18516052
Full text
Article - document accessible for UNIGE members only Limited access to UNIGE
Other version: http://www.nature.com/nm/journal/v14/n7/pdf/nm1780.pdf
Structures
Research group La Sclérose en plaques (908)
Citation
(ISO format)
LANG, Philipp A. et al. Aggravation of viral hepatitis by platelet-derived serotonin. In: Nature Medicine, 2008, vol. 14, n° 7, p. 756-761. https://archive-ouverte.unige.ch/unige:19180

200 hits

0 download

Update

Deposited on : 2012-03-27

Export document
Format :
Citation style :