{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T04:13:46Z","timestamp":1789704826550,"version":"4.0.1"},"reference-count":27,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"5","license":[{"start":{"date-parts":[[2013,11,1]],"date-time":"2013-11-01T00:00:00Z","timestamp":1383264000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2013,8,6]],"date-time":"2013-08-06T00:00:00Z","timestamp":1375747200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2013,11]]},"abstract":"<jats:sec>\n            <jats:title\/>\n            <jats:p>\n                                 <jats:bold>The cytokine tumor necrosis factor alpha (TNF-\u03b1; TNF) plays a critical role early in liver regeneration following partial hepatectomy (PH). TNF stimulates at least three different pathways leading to nuclear factor kappa B (NF-\u03baB) activation, apoptosis signaling by way of caspase-8 (Casp8), and activation of cJun N-terminal kinases (JNK). The present study aimed to better define the role of Casp8 during liver regeneration. We performed PH in mice lacking Casp8 specifically in hepatocytes (Casp8\u0394hepa) and determined their liver regeneration capacity by measuring liver mass restoration and kinetics of cell cycle progression. Casp8\u0394hepa mice showed an accelerated onset of DNA synthesis after PH, delayed hepatocyte mitosis, but overall normal liver mass restoration. Analysis of immediate TNF-dependent signaling pathways revealed that loss of Casp8 prevents proteolytic cleavage of the receptor-interacting protein 1 (RIP1) in hepatocytes and subsequently triggers premature activation of NF-\u03baB and JNK\/cJun related signals. In order to define the role of NF-\u03baB in this setting we blocked NF-\u03baB activation in Casp8\u0394hepa mice by concomitant inactivation of the NF-\u03baB essential modulator (NEMO) in hepatocytes. Lack of NEMO largely reverted aberrant DNA synthesis in Casp8\u0394hepa mice but resulted in incomplete termination of the regeneration process and hepatomegaly.<\/jats:bold>\n                              <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion:<\/jats:title>\n            <jats:p>\n                                 <jats:bold>Casp8 comprises a nonapoptotic function during liver regeneration by balancing RIP1, NF-\u03baB, and JNK activation. While loss of Casp8 triggers NF-\u03baB activation and thus improves liver regeneration, combined loss of Casp8 and NEMO impairs a controlled regenerative response and drives hepatomegaly. 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