In nude mice grieofulvin given by intraperitoneal injections produces a severe porphyric state within 1 week. Compared with peroral administration of griseofulvin to produce experimental porphyria, this model is much more efficient and can be more easily controlled.
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Biochem Pharmacol
December 2015
Center for Pharmacogenetics, Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA. Electronic address:
Griseofulvin (GSF) causes hepatic porphyria in mice, which mimics the liver injury associated with erythropoietic protoporphyria (EPP) in humans. The current study investigated the biochemical basis of GSF-induced liver injury in mice using a metabolimic approach. GSF treatment in mice resulted in significant accumulations of protoporphyrin IX (PPIX), N-methyl PPIX, bile acids, and glutathione (GSH) in the liver.
View Article and Find Full Text PDFCell Mol Biol (Noisy-le-grand)
February 2009
Gene Therapy and Hepatology, CIMA, Pamplona, Navarra, Spain.
Activation of the epidermal growth factor receptor (EGFR) plays an important role in liver regeneration and resistance to acute injury. However its chronic activation participates in the progression of liver disease, including fibrogenesis and malignant transformation. Hepatobiliary disease represents a constant feature in the clinically relevant Fechm1pas/Fechm1pas genetic model of erythropoietic protoporphyria (EPP).
View Article and Find Full Text PDFPhysiol Res
May 2007
Unité de Génétique des Mammiferes, Institut Pasteur, Paris cedex 15, France.
Erythropoietic protoporphyria (EPP) is an inherited disorder of heme biosynthesis caused by partial ferrochelatase deficiency, resulting in protoporphyrin overproduction which is responsible for painful skin photosensitivity. Chronic liver disease is the most severe complication of EPP, requiring liver transplantation in some patients. Data from a mouse model suggest that cytotoxic bile formation with high concentrations of bile salts and protoporphyrin may cause biliary fibrosis by damaging bile duct epithelium.
View Article and Find Full Text PDFAm J Pathol
April 2005
Medical Research Council, Toxicology Unit, Hodgkin Bldg., University of Leicester, Lancaster Rd, Leicester, LE1 9HN, UK.
BALB/c Fech(m1Pas) mice have a mutated ferrochelatase gene resulting in protoporphyria that models the hepatic injury occurring sporadically in human erythropoietic protoporphyria. We used this mouse model to study the development of the injury and to compare the dysfunction of heme synthesis with hepatic gene expression of liver metabolism, oxidative stress, and cellular injury/inflammation. From an early age expression of total cytochrome P450 and many of its isoforms was significantly lower than in wild-type mice.
View Article and Find Full Text PDFJ Invest Dermatol
June 2004
Department of Biophysics, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.
Although oxygen radicals are thought to play a key role in the skin injury that is caused by protoporphyria, there is no direct evidence of generation of these radicals in vivo. This study measured the generation of oxygen radicals caused by visible light non-invasively in the skin of griseofulvin-induced protoporphyria model mice, using an in vivo electron spin resonance spectrometer equipped with a surface-coil-type resonator that could detect radicals within about 0.5 mm of the skin surface.
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