The Emerging Role of Ferroptosis in Various Chronic Liver Diseases: Opportunity or Challenge

Abstract

Ferroptosis is a recently identified iron-dependent form of intracellular lipid peroxide accumulation-mediated cell death. Different from other types of cell death mechanisms, it exhibits distinct biological and morphological features characterized by the loss of lipid peroxidase repair activity caused by glutathione peroxidase 4, the presence of redox-active iron, and the oxidation of phospholipids-containing polyunsaturated fatty acids. In recent years, studies have shown that ferroptosis plays a key role in various liver diseases such as alcoholic liver injury, non-alcoholic steatohepatitis, liver cirrhosis, and liver cancer. However, the mechanism of ferroptosis and its regulation on chronic liver disease are controversial among different types of cells in the liver. Herein, we summarize the current studies on mechanism of ferroptosis in chronic liver disease, aiming to outline the blueprint of ferroptosis as an effective option for chronic liver disease therapy.

Semiconducting Transport in Pb10−XCux(PO4)6O Sintered from Pb2SO5 and Cu3P

“…During the review and revision process of this work, lots of groups have published their experimental studies via the arXiv preprint server. It is worth noticing that almost all the electrical transport studies are consistent with our major resultsemiconductor/insulator-like transport behavior for the nominal Pb 10−x Cu x (PO 4 ) 6 O compound sintered from Pb 2 SO 5 and Cu 3 P. Specifically, in the study by Hou et al, [15] most of their samples exhibit semiconducting behavior, except that one piece of small samples exhibits extraordinarily small metallic resistance; in the experiment study by Guo et al, [16] the temperature-dependent resistivity of their Pb 10−x Cu x (PO 4 ) 6 O pellet sample shows semiconducting transport behavior similar to ours; in the report by Kumar et al, [17] it was mentioned that their samples are highly resistive; Timokhin et al [18] reported that their samples have strong inhomogeneity and are resistive with largely varied transport properties; Zhu et al [19] presented the semiconducting transport behavior for the Pb 10−x Cu x (PO 4 ) 6 O major phase; Zhang et al [20] reported the insulating transport behavior with a logarithmic temperature dependence of resistivity; Singh et al [21] reported the insulating nature of the temperature-dependent resistivity; the major phase of the Pb 10−x Cu x (PO 4 ) 6 O compound fabricated by Wu et al [22] exhibits the semiconducting transport behavior; and Wang et al [29] found that all their samples are semiconducting/insulating no matter whether the samples show magnetic levitation or not.…”

“…An impressive aspect that might be highly relevant to the resistance transition in the previously reported data by Lee et al, [3,4] is Cu 2 S. It was pointed out [19,23] that as early as in 1951, [24] the electrical transport properties of Cu 2 S were found to exhibit a sharp first-order resistive transition at ≈380 K, and correspondingly, the specific heat peaks [23] at this temperature too (Note: the possible magnetic-field response of the first-order resistive transition in Cu 2 S, which has been implied by the magnetotransport data collected by Wu et al, [22] might be promising for exploring novel magnetoelectronic phenomena and constructing useful magnetoelectronic devices [6][7][8][9][10][11][12][30][31][32] ). Another important aspect is the recently synthesized single crystals of Pb 10−x Cu x (PO 4 ) 6 O seem kind of transparent, [25,26] which implies that they might be intrinsically highly insulating although de-Figure 13.…”

Novel Therapeutic Approaches to Liver Fibrosis Based on Targeting Oxidative Stress

“…Equally, the role of ferroptosis in ALD has been demonstrated in preclinical models of this disease, which showed that alcohol-induced accumulation of ROS and lipid peroxidation were counteracted by ferroptosis inhibitors [ 119 ]. On the other hand, ferroptosis can be considered a new strategy to eliminate activated HSC and ameliorate liver fibrosis [ 120 , 121 ]. In fact, several compounds are thought to exert antifibrotic effects by inducing this type of cell death in HSC in in vivo and in vitro preclinical models.…”