Title
Direct cell-to-cell contact between Kupffer cells and hepatocytes augments endotoxin-induced hepatic injury
Author
Hoebe, K.H.N.
Witkamp, R.F.
Fink-Gremmels, J.
van Miert, A.S.J.P.A.M.
Monshouwer, M.
Centraal Instituut voor Voedingsonderzoek TNO
Publication year
2001
Abstract
This study focuses on the importance of direct contact between Kupffer cells (KCs) and hepatocytes (HCs) during the hepatic inflammatory response using an in vitro approach. The lipopolysaccharide (LPS)-induced inflammatory response in monocultures of porcine HCs and KCs were compared with cocultures prepared either with direct contact between KCs and HCs (DC cocultures) or without direct contact using cell culture membrane inserts. Our data show that DC cocultures exhibited the highest production of tumor necrosis factor (TNF)-α, interleukin-6, and nitric oxide (NO) compared with the other cultures. Immunohistochemical studies revealed that TNF-α was exclusively produced by KCs, whereas HCs were responsible for NO production after LPS stimulation. Biotransformation capacity, as determined by cytochrome P-450 and UDP glucuronosyl transferase enzyme activities, was most significantly decreased in DC cocultures. These results provide evidence that direct contact between KCs and HCs favors the extensive TNF-α production by KCs but in turn affects HC functionality and viability. These findings suggest that direct contact between KCs and HCs plays a key role in the development of a fulminating hepatic inflammatory response. Chemicals/CAS: Endotoxins; Interleukin-6; Nitric Oxide Synthase Type II, EC 1.14.13.39; Nitric Oxide Synthase, EC 1.14.13.39; Nitric Oxide, 10102-43-9; Reactive Oxygen Species; Tumor Necrosis Factor-alpha
Subject
Nutrition
Animals
Biotransformation
Blotting, Western
Cell Communication
Cell Membrane Permeability
Cell Survival
Cells, Cultured
Coculture Techniques
Endotoxins
Hepatitis, Toxic
Hepatocytes
Immunohistochemistry
Interleukin-6
Kupffer Cells
Male
Nitric Oxide
Nitric Oxide Synthase
Nitric Oxide Synthase Type II
Reactive Oxygen Species
Swine
Tumor Necrosis Factor-alpha
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TNO identifier
87495
ISSN
0193-1857
Source
American Journal of Physiology Gastrointestinal and Liver Physiology, 280 (4 43-4), G720-G728
Document type
article