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The regulatory mechanisms prepare hepatocytes to enter the cell cycle. The proliferation phase involves activation of various growth factors, including two factors that play a major role in liver regeneration, EGFR (epidermal growth factor receptor) and c-Met. During this phase, hepatocytes undergo a series of cell division cycles and expansion ...
The hepatocyte plates are one cell thick in mammals and two cells thick in the chicken. Sinusoids display a discontinuous, fenestrated endothelial cell lining. The endothelial cells have no basement membrane and are separated from the hepatocytes by the space of Disse, which drains lymph into the portal tract lymphatics. [citation needed]
Hepatocytes are the liver's primary parenchymal cells, forming 80% of the liver's mass and 60% of its cells. They are round in shape and contain a nucleus and organelles that contribute to metabolic and secretory functions. [5] Hepatocytes also play a pivotal role in liver inflammation. [6]
The next step in cancer immunoediting is the equilibrium phase, during which tumor cells that have escaped the elimination phase and have a non-immunogenic phenotype are selected for growth. Lymphocytes and IFN-gamma exert a selection pressure on tumor cells which are genetically unstable and rapidly mutating.
The recovery phase is characterized by resolution of the clinical symptoms of hepatitis with persistent elevations in liver lab values and potentially a persistently enlarged liver. [17] All cases of hepatitis A and E are expected to fully resolve after 1–2 months. [17] Most hepatitis B cases are also self-limiting and will resolve in 3–4 ...
The HepaRG cells have been found to express major nuclear receptors, [5] as well as drug and bile acids transporters, [6] and key hepatic nuclear factors. [ 7 ] [ 8 ] They also possess functional levels of phase I (CYP (CYP1A1/2, CYP2B6, CYP2Cs, CYP3A4, etc.) and II (UGT1A1, GSTA1, GSTA4, GSTM1) drug metabolizing enzymes. [ 9 ]
Hepatocyte growth factor regulates cell growth, cell motility, and morphogenesis by activating a tyrosine kinase signaling cascade after binding to the proto-oncogenic c-Met receptor. [ 6 ] [ 7 ] Hepatocyte growth factor is secreted by platelets , [ 8 ] and mesenchymal cells and acts as a multi-functional cytokine on cells of mainly epithelial ...
The main liver cells are called hepatocytes; however, there are other cells that can be observed in a liver sample such as Kupffer cells (macrophages). [2] The liver is the biggest gland of the body. It has a wide variety of functions that range from the destruction of old blood cells to the control of the whole metabolism of macromolecules. [3]
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