PMID- 15249655 OWN - NLM STAT- MEDLINE DCOM- 20040826 LR - 20220408 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 101 IP - 29 DP - 2004 Jul 20 TI - Met provides essential signals for liver regeneration. PG - 10608-13 AB - Genetic analysis in mice has demonstrated a crucial role of the Met tyrosine kinase receptor and its ligand, hepatocyte growth factor/scatter factor (HGF/SF), in development of the liver, muscle, and placenta. Here, we use conditional mutagenesis in mice to analyze the function of Met during liver regeneration, using the Mx-cre transgene to introduce the mutation in the adult. After partial hepatectomy in mice carrying the Mx-cre-induced Met mutation, regeneration of the liver is impaired. Comparison of signal transduction pathways in control and mutant livers indicates that Met and other signaling receptors cooperate to fully activate particular signaling molecules, for instance, the protein kinase Akt. However, activation of the Erk1/2 kinase during liver regeneration depends exclusively on Met. Signaling crosstalk is thus an important aspect of the regulation of liver regeneration. Analysis of cell cycle progression of hepatocytes in conditional Met mutant mice indicates a defective exit from quiescence and diminished entry into S phase. Impaired liver regeneration is accompanied by compensatory physiological responses that include prolonged up-regulation of HGF/SF and IL-6 in peripheral blood. Our data demonstrate that the HGF/SF/Met signaling system is essential not only during liver development but also for the regeneration of the organ in the adult. FAU - Borowiak, Malgorzata AU - Borowiak M AD - Max Delbruck Center for Molecular Medicine, Robert-Rossle-Strasse 10, 13125 Berlin-Buch, Germany. FAU - Garratt, Alistair N AU - Garratt AN FAU - Wustefeld, Torsten AU - Wustefeld T FAU - Strehle, Michael AU - Strehle M FAU - Trautwein, Christian AU - Trautwein C FAU - Birchmeier, Carmen AU - Birchmeier C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20040712 PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (Cell Cycle Proteins) RN - 0 (DNA-Binding Proteins) RN - 0 (Interleukin-6) RN - 0 (Proto-Oncogene Proteins) RN - 0 (STAT3 Transcription Factor) RN - 0 (Stat3 protein, mouse) RN - 0 (Trans-Activators) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-met) RN - EC 2.7.11.1 (Glycogen Synthase Kinase 3 beta) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - EC 2.7.11.26 (Glycogen Synthase Kinase 3) SB - IM MH - Animals MH - Cell Cycle/physiology MH - Cell Cycle Proteins/metabolism MH - DNA-Binding Proteins/metabolism MH - Glycogen Synthase Kinase 3/metabolism MH - Glycogen Synthase Kinase 3 beta MH - Hepatectomy MH - Hepatocyte Growth Factor/blood MH - Interleukin-6/blood MH - Liver/cytology/metabolism/pathology MH - *Liver Regeneration MH - Mice MH - Mice, Transgenic MH - Mitogen-Activated Protein Kinases/metabolism MH - Mutation MH - Protein Serine-Threonine Kinases/metabolism MH - Proto-Oncogene Proteins/metabolism MH - Proto-Oncogene Proteins c-akt MH - Proto-Oncogene Proteins c-met/genetics/*metabolism MH - STAT3 Transcription Factor MH - Signal Transduction/*physiology MH - Trans-Activators/metabolism MH - Transgenes PMC - PMC490025 EDAT- 2004/07/14 05:00 MHDA- 2004/08/27 05:00 PMCR- 2005/01/20 CRDT- 2004/07/14 05:00 PHST- 2004/07/14 05:00 [pubmed] PHST- 2004/08/27 05:00 [medline] PHST- 2004/07/14 05:00 [entrez] PHST- 2005/01/20 00:00 [pmc-release] AID - 0403412101 [pii] AID - 10110608 [pii] AID - 10.1073/pnas.0403412101 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 2004 Jul 20;101(29):10608-13. doi: 10.1073/pnas.0403412101. Epub 2004 Jul 12.