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Kazuki Takeishi et al.
Cell reports, 31(9), 107711-107711 (2020-06-04)
The availability of an autologous transplantable auxiliary liver would dramatically affect the treatment of liver disease. Assembly and function in vivo of a bioengineered human liver derived from induced pluripotent stem cells (iPSCs) has not been previously described. By improving methods
Suchitra Sumitran-Holgersson et al.
Cell transplantation, 18(2), 183-193 (2009-06-09)
Although the appearance of hepatic foci in the pancreas has been described in animal experiments and in human pathology, evidence for the conversion of human pancreatic cells to liver cells is still lacking. We therefore investigated the developmental plasticity between
D Hunter Best et al.
Experimental and molecular pathology, 88(1), 7-14 (2009-10-31)
Complete liver regeneration after partial hepatectomy (PH) in rats exposed to the pyrrolizidine alkaloid retrorsine is accomplished through the activation, expansion, and differentiation of a population of small hepatocyte-like progenitor cells (SHPCs). The mechanism(s) governing activation of SHPCs after PH
Virginie Pichard et al.
Human gene therapy, 24(2), 143-151 (2012-12-20)
Lentiviral vectors are efficient gene delivery vehicles for therapeutic and research applications. In contrast to oncoretroviral vectors, they are able to infect most nonproliferating cells. In the liver, induction of cell proliferation dramatically improved hepatocyte transduction using all types of
Meijuan Tu et al.
Toxicology, 322, 34-42 (2014-05-07)
Retrorsine (RTS) is a hepatotoxic pyrrolizidine alkaloid present in plants of the Senecio genus. The present study is aimed at clarifying the role of organic cation transporters (OCTs) in the liver disposition of RTS, and the coupling of OCT1 and
Valerie Gouon-Evans et al.
Nature biotechnology, 24(11), 1402-1411 (2006-11-07)
When differentiated in the presence of activin A in serum-free conditions, mouse embryonic stem cells efficiently generate an endoderm progenitor population defined by the coexpression of either Brachyury, Foxa2 and c-Kit, or c-Kit and Cxcr4. Specification of these progenitors with
Hu Lin et al.
World journal of gastroenterology, 14(15), 2329-2337 (2008-04-18)
To investigate whether human hepatocytes could proliferate after transplantation to normal immunocompetent rats treated with 2-acetaminofluorene or retrorsine and partial hepatectomy. L02 hepatocyte-tolerant Sprague-Dawley rats were injected with retrorsine, 2-acetaminofluorene or normal saline. L02 hepatocytes were then transplanted via the
Mabel Fragoso-Serrano et al.
Journal of natural products, 75(5), 890-895 (2012-05-04)
Commercial preparations of the Mexican herbal drug known as "miracle tea" (Packera candidissima and P. bellidifolia) have been profiled qualitatively by HPLC and GC-MS. Eremophilanes (3-7) were the major components found in the hexane-soluble fraction, while pyrrolizidine alkaloids (PAs) were
Chun-Hsien Yu et al.
Cell transplantation, 18(10), 1081-1092 (2009-08-05)
Efficient repopulation by transplanted hepatocytes in the severely injured liver is essential for their clinical application in the treatment of acute hepatic failure. We studied here whether and how the transplanted hepatocytes are able to efficiently repopulate the toxin-induced acute
D Hunter Best et al.
Experimental and molecular pathology, 89(2), 92-98 (2010-07-06)
Liver regeneration after partial hepatectomy (PH) in rats exposed to the pyrrolizidine alkaloid retrorsine is accomplished through the proliferation and differentiation of a population of small hepatocyte-like progenitor cells (SHPCs). The activation, emergence, and outgrowth of SHPCs in response to
Kate E Brilliant et al.
Transplantation, 88(4), 486-495 (2009-08-22)
Pretreatment with retrorsine crosslinks host hepatocyte DNA and prevents proliferation after partial hepatectomy (PH), allowing selective expansion of transplanted progenitors. Shortcomings are length of protocol and carcinogenicity of retrorsine. This report describes a rapid liver repopulation protocol using mitomycin C
Biao Zhang et al.
The Journal of surgical research, 157(1), 71-80 (2009-04-07)
The therapeutic effects of bone marrow and hepatocyte transplantation were investigated regarding the treatment of retrorsine-partial hepatectomy-induced liver injury. Analbuminemic F344alb rats were given two doses of retrorsine 2 wk apart, followed 4 wk later by transplantation with F344 rat
Eleftherios Michailidis et al.
Proceedings of the National Academy of Sciences of the United States of America, 117(3), 1678-1688 (2020-01-10)
Primary human hepatocytes (PHHs) are an essential tool for modeling drug metabolism and liver disease. However, variable plating efficiencies, short lifespan in culture, and resistance to genetic manipulation have limited their use. Here, we show that the pyrrolizidine alkaloid retrorsine
Gary E Martin et al.
Magnetic resonance in chemistry : MRC, 50(8), 563-568 (2012-07-19)
ADEQUATE experiments provide an alternative to the more commonly employed GHMBC experiment for the establishment of long-range heteronuclear connectivities. The 1,1-ADEQUATE experiment allows the unequivocal identification of both protonated and non-protonated carbon resonances adjacent to a protonated carbon. The 1,n-ADEQUATE
Eva Castells et al.
Phytochemistry, 108, 137-146 (2014-10-02)
Changes in plant chemical defenses after invasion could have consequences on the invaded ecosystems by modifying the interactions between plants and herbivores and facilitating invasion success. However, no comprehensive biogeographical studies have yet determined the phenotypic levels of plant chemical
Jiayin Han et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 36(14), 1901-1904 (2011-10-25)
To investigate the fetotoxicity of retrorsine. Mouse whole embryo culture (WEC) was applied. Post-implantation (8.5 d) mouse embryos were isolated from their mothers and put into the medium of immediately centrifuged serum (ICS) prepared from rats. Different concentrations of retrorsine
Ya-Hui Chen et al.
Hepatology (Baltimore, Md.), 57(3), 1215-1224 (2012-10-20)
The potential lineage relationship between hepatic oval cells, small hepatocyte-like progenitor cells (SHPCs), and hepatocytes in liver regeneration is debated. To test whether mature hepatocytes can give rise to SHPCs, rats with dipeptidyl peptidase IV (DPPIV) chimeric livers, which harbored
Qingsu Xia et al.
Toxicology letters, 178(2), 77-82 (2008-04-09)
Pyrrolizidine alkaloid-containing plants are widespread in the world and may be the most common poisonous plants affecting livestock, wildlife, and humans. Pyrrolizidine alkaloids require metabolism to exert their genotoxicity and tumorigenicity. Our mechanistic studies have determined that metabolism of the
Maria Paola Serra et al.
Hepatology (Baltimore, Md.), 56(2), 760-768 (2012-03-07)
In the retrorsine (RS)-based model of massive liver repopulation, preexposure to this naturally occurring alkaloid is sufficient to prime normal host parenchymal cells to be slowly replaced by transplanted normal hepatocytes. The basis for this striking effect is yet to
Silvia Doratiotto et al.
Histochemistry and cell biology, 135(6), 581-591 (2011-04-30)
Overt neoplasia is often the end result of a long biological process beginning with the appearance of focal lesions of altered tissue morphology. While the putative clonal nature of focal lesions has often been emphasized, increasing attention is being devoted
Chun-Hsien Yu et al.
Cell transplantation, 19(2), 231-243 (2009-11-13)
Oval cells and hepatocytes rarely proliferate simultaneously. This study aimed to determine the impacts of hepatocyte transplantation on the response and fate of oval cells that are activated to proliferate in acute severe hepatic injury. Retrorsine + D-galactosamine (R+D-gal) treatment
Gary E Martin et al.
Journal of natural products, 74(11), 2400-2407 (2011-11-08)
1H-13C GHSQC and GHMBC spectra are irrefutably among the most valuable 2D NMR experiments for the establishment of unknown chemical structures. However, the indeterminate nature of the length of the long-range coupling(s) observed via the (n)J(CH)-optimized delay of the GHMBC
Takayuki Hamada et al.
Hepato-gastroenterology, 56(94-95), 1466-1470 (2009-12-03)
The aim of this study was to regenerate transplanted hepatocytes selectively in a recipient using retrorsine and recombinant human hepatocyte growth factor (rhHGF). Nagase analbuminemic rats (NARs) received pretreatment with retrosine and were divided into three experimental groups. Group1: Hepatocyte
Virginie Pichard et al.
PloS one, 4(9), e7267-e7267 (2009-10-01)
When hepatocyte proliferation is impaired, liver regeneration proceeds from the division of non parenchymal hepatocyte progenitors. Oval cells and Small Hepatocyte-like Progenitor Cells (SHPCs) represent the two most studied examples of such epithelial cells with putative stem cell capacity. In
Meghnad Joshi et al.
Cytotherapy, 14(6), 657-669 (2012-03-20)
One important problem commonly encountered after hepatocyte transplantation is the low numbers of transplanted cells found in the graft. If hepatocyte transplantation is to be a viable therapeutic approach, significant liver parenchyma repopulation is required. Mesenchymal stromal cells (MSC) produce
Toine F H Bovee et al.
Mutation research, 778, 1-10 (2015-05-30)
It has previously been demonstrated by others that acetone extracts of Senecio jacobaea (syn. Jacobaea vulgaris, common or tansy ragwort) test positive in the Salmonella/microsome mutagenicity test (Ames test). Pyrrolizidine alkaloids (PAs) are thought to be responsible for these mutagenic
Manabu Nishie et al.
Cell transplantation, 18(5), 665-675 (2009-09-25)
Hepatocyte transplantation is effective for treating liver failure, but healthy donors as a source of hepatocytes are quite limited. The livers of patients with hepatic fibrosis could be an alternative source; however, few reports have examined the nature of hepatocytes
Norihisa Ichinohe et al.
Cell transplantation, 21(1), 11-22 (2011-06-15)
Cell-based therapies as an alternative to liver transplantation have been anticipated for the treatment of potentially fatal liver diseases. Not only mature hepatocytes (MHs) but also hepatic stem/progenitor cells are considered as candidate cell sources. However, whether the stem/progenitor cells
Maria Paola Serra et al.
Cell transplantation, 21(4), 671-677 (2011-09-29)
Cancer often arises in a background of chronic tissue damage. It is also increasingly appreciated that such an injured tissue microenvironment might foster the selective emergence of altered cells, leading to neoplasia. Accordingly, reversal of chronic tissue damage could represent
Jieyu Dai et al.
Chemico-biological interactions, 183(1), 49-56 (2009-10-13)
Retrorsine (RTS) and monocrotaline (MCT) cause severe toxicities via P450-mediated metabolic activation. The screening of mechanism-based inhibitors showed RTS inactivated 3A4 in the presence of NADPH. Unlike RTS, MCT failed to inhibit P450 3A4 and other enzymes tested. Further studies
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