1
|
Favier RP, Spee B, Fieten H, van den Ingh TSGAM, Schotanus BA, Brinkhof B, Rothuizen J, Penning LC. Aberrant expression of copper associated genes after copper accumulation in COMMD1-deficient dogs. J Trace Elem Med Biol 2015; 29:347-53. [PMID: 25053573 DOI: 10.1016/j.jtemb.2014.06.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 05/19/2014] [Accepted: 06/16/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND COMMD1-deficient dogs progressively develop copper-induced chronic hepatitis. Since high copper leads to oxidative damage, we measured copper metabolism and oxidative stress related gene products during development of the disease. METHODS Five COMMD1-deficient dogs were studied from 6 months of age over a period of five years. Every 6 months blood was analysed and liver biopsies were taken for routine histological evaluation (grading of hepatitis), rubeanic acid copper staining and quantitative copper analysis. Expression of genes involved in copper metabolism (COX17, CCS, ATOX1, MT1A, CP, ATP7A, ATP7B, ) and oxidative stress (SOD1, catalase, GPX1 ) was measured by qPCR. Due to a sudden death of two animals, the remaining three dogs were treated with d-penicillamine from 43 months of age till the end of the study. Presented data for time points 48, 54, and 60 months was descriptive only. RESULTS A progressive trend from slight to marked hepatitis was observed at histology, which was clearly preceded by an increase in semi-quantitative copper levels starting at 12 months until 42 months of age. During the progression of hepatitis most gene products measured were transiently increased. Most prominent was the rapid increase in the copper binding gene product MT1A mRNA levels. This was followed by a transient increase in ATP7A and ATP7B mRNA levels. CONCLUSIONS In the sequence of events, copper accumulation induced progressive hepatitis followed by a transient increase in gene products associated with intracellular copper trafficking and temporal activation of anti-oxidative stress mechanisms.
Collapse
Affiliation(s)
- Robert P Favier
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands.
| | - Bart Spee
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands
| | - Hille Fieten
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands
| | | | - Baukje A Schotanus
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands
| | - Bas Brinkhof
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands
| | - Jan Rothuizen
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands
| | - Louis C Penning
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands
| |
Collapse
|
2
|
Kang X, Liu G, Liu Y, Xu Q, Zhang M, Fang M. Transcriptome profile at different physiological stages reveals potential mode for curly fleece in Chinese tan sheep. PLoS One 2013; 8:e71763. [PMID: 23990983 PMCID: PMC3753335 DOI: 10.1371/journal.pone.0071763] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 07/04/2013] [Indexed: 01/28/2023] Open
Abstract
Tan sheep (Ovis aries), a Chinese indigenous breed, has special curly fleece after birth, especially at one month old. However, this unique phenotype disappears gradually with age and the underlying reasons of trait evolvement are still unknown. In this study, skin transcriptome data was used to study this issue. In total 51,215 transcripts including described transcripts and transfrags were identified. Pathway analysis of the top 100 most highly expressed transcripts, which included TCHH and keratin gene family members, such as KRT25, KRT5, KRT71, KRT14 and others, showed pathways known to be relevant to hair/fleece development and function. Six hundred differentially expressed (DE) transcripts were detected at two different physiological ages (one-month-old with curly fleece and 48-month-old without curly fleece) and were categorized into three major functional groups: cellular component, molecular function, and biological process. The top six functional categories included cell, cell part, cellular process, binding, intracellular, metabolic process. The detected differentially expressed genes were particularly involved in signal, signal peptide, disulfide bond, glycoprotein and secreted terms, respectively. Further splicing isoform analysis showed that the metallothionein 3 isoform was up-regulated in Tan lamb skin, indicating that it may be related to the conformation of curly fleece in Chinese Tan lamb. The hair-related important differentially expressed genes (SPINK4, FGF21, ESRα, EphA3, NTNG1 and GPR110) were confirmed by qPCR analysis. We deduced that the differences existed in expressed transcripts, splice isoforms and GO categories between the two different physiological stages, which might constitute the major reasons for explaining the trait evolvement of curly fleece in Chinese Tan sheep. This study provides some clues for elucidating the molecular mechanism of fleece change with age in Chinese Tan sheep, as well as supplying some potential values for understanding human hair disorder and texture changes.
Collapse
Affiliation(s)
- Xiaolong Kang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
- College of Agriculture, Ningxia University, Yinchuan, People’s Republic of China
| | - Gang Liu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yufang Liu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Qinqin Xu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ming Zhang
- Department of Animal Sciences, Washington State University, Pullman, Washington, United States of America
| | - Meiying Fang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
- * E-mail:
| |
Collapse
|
3
|
Favier RP, Spee B, Penning LC, Rothuizen J. Copper-induced hepatitis: the COMMD1 deficient dog as a translational animal model for human chronic hepatitis. Vet Q 2012; 31:49-60. [PMID: 22029820 DOI: 10.1080/01652176.2011.563146] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Chronic inflammatory liver disease regardless of aetiology leads to failing regeneration and fibrosis, ending in cirrhosis. Both in man and in animals this worldwide health problem has no definitive cure. Chronic liver injury causes hepatic stellate cells to proliferate and differentiate into matrix-producing cells. New therapeutic options will be developed upon detailed understanding of the molecular mechanisms driving liver fibrosis. This may lead to new anti-fibrotic therapies which need to be tested in suitable models before application in the veterinary and human clinic. On the other side, to restore the failing regenerative capacity of the diseased liver cells, adult progenitor cells are of interest, as an alternative to whole organ transplantation. In order to find the most suitable large animal model it is important to recognise that the typical histopathological reaction pattern of the liver can differ between mammalian species. It is therefore imperative that specialists in veterinary internal medicine and pathology, being familiar with the diseases and pathologies of the liver in different animal species, are teaming-up in finding the best models for veterinary and human liver diseases. Several large animal models have been mentioned, like pigs, sheep, and dogs. Based on the observations that man and dog share the same hepatopathies and have identical clinical, pathological and pathogenetic reaction patterns during the development of liver disease, the dog seems to be a properly suited species to test new therapeutic strategies for pets and their best friends.
Collapse
Affiliation(s)
- R P Favier
- Faculty of Veterinary Medicine, Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, the Netherlands.
| | | | | | | |
Collapse
|
4
|
Spee B, Arends B, Ingh TS, Penning LC, Rothuizen J. Copper Metabolism and Oxidative Stress in Chronic Inflammatory and Cholestatic Liver Diseases in Dogs. J Vet Intern Med 2006. [DOI: 10.1111/j.1939-1676.2006.tb00706.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
5
|
Armendariz AD, Gonzalez M, Loguinov AV, Vulpe CD. Gene expression profiling in chronic copper overload reveals upregulation ofPrnpandApp. Physiol Genomics 2004; 20:45-54. [PMID: 15467011 DOI: 10.1152/physiolgenomics.00196.2003] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The level at which copper becomes toxic is not clear. Several studies have indicated that copper causes oxidative stress; however, most have tested very high levels of copper exposure. We currently have only a limited understanding of the protective systems that operate in cells chronically exposed to copper. Additionally, the limits of homeostatic regulation are not known, making it difficult to define the milder effects of copper excess. Furthermore, a robust assay to facilitate the diagnosis of copper excess and to distinguish mild, moderate, and severe copper overload is needed. To address these issues, we have investigated the effects on steady-state gene expression of chronic copper overload in a cell culture model system using cDNA microarrays. For this study we utilized cells from genetic models of copper overload: fibroblast cells from two mouse mutants, C57BL/6- Atp7aMobrand C57BL/6- Atp7aModap. These cell lines accumulate copper to abnormally high levels in normal culture media due to a defect in copper export from the cell. We identified 12 differentially expressed genes in common using our outlier identification methods. Surprisingly, our results show no evidence of oxidative stress in the copper-loaded cells. In addition, candidate components perhaps responsible for a copper-specific homeostatic response are identified. The genes that encode for the prion protein and the amyloid-β precursor protein, two known copper-binding proteins, are upregulated in both cell lines.
Collapse
Affiliation(s)
- Angela D Armendariz
- Department of Nutritional Science and Toxicology, University of California, Berkeley 94720, USA
| | | | | | | |
Collapse
|
6
|
Affiliation(s)
- J H Menkes
- Division of Pediatric Neurology, Cedars Sinai Medical Center, Los Angeles, California 90212-3216, USA
| |
Collapse
|
7
|
Prasad R, Kaur G, Mond R, Walia BN. Identification of a novel copper-binding protein from the liver of Indian childhood cirrhosis: purification and physicochemical characterization [corrected]. Pediatr Res 1998; 44:673-81. [PMID: 9803448 DOI: 10.1203/00006450-199811000-00009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A novel copper-binding protein was identified in the liver supernatant (100,000 x g) of Indian childhood cirrhosis (ICC), purified to apparent homogeneity and characterized [corrected]. Purified major copper-binding protein (MCuBP) is solely responsible for binding about 35% of the total supernatant copper. Elution profile of ICC liver supernatant on Sephadex G-75 column chromatography showed three peaks. About 60% of the total supernatant copper was resolved in peak II, whereas zinc content was insignificant in this peak. But peak II was almost missing in a gel elution profile of control liver supernatant. The control group included cases of various liver diseases viz. neonatal hepatitis, septicemia, and mixed nodular cirrhosis. Copper-binding proteins of peak II further purified on ion-exchange chromatography and elution profile showed that peak II was a MCuBP with high copper-binding capacity (10 g atoms/mol of native protein). SDS-PAGE of this protein also revealed the existence of a single band with molecular mass of about 50 kD. UV spectra of MCuBP showed the maximal absorbance at 254 nm. Unlike the classical metallothionein, the amino acid composition of MCuBP revealed the presence of aromatic amino acids and higher content of glutamic acid and aspartic acid followed by glycine and serine. The ratio (0.3) of basic amino acids to acidic amino acids strongly indicates that it is an acidic protein. The cysteine content in this protein was insignificant, which further corroborates the possibility that the acidic amino acids might be prominent candidates for binding copper. Thus, the 50-kD MCuBP apparently makes a major contribution to the total copper-binding activity in ICC liver cytosol and may play a significant role in hepatic intracellular copper accumulation.
Collapse
Affiliation(s)
- R Prasad
- Department of Biochemistry, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | | | | | | |
Collapse
|
8
|
Chen Y, Saari JT, Kang Y. Copper deficiency increases metallothionein-I mRNA content selectively in rat liver. J Nutr Biochem 1995. [DOI: 10.1016/0955-2863(95)00129-n] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
9
|
Das S, Levinson B, Vulpe C, Whitney S, Gitschier J, Packman S. Similar splicing mutations of the Menkes/mottled copper-transporting ATPase gene in occipital horn syndrome and the blotchy mouse. Am J Hum Genet 1995; 56:570-6. [PMID: 7887410 PMCID: PMC1801180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The connective-tissue disorder occipital horn syndrome (OHS) is hypothesized to be allelic to Menkes disease. The two diseases have different clinical presentations but have a similar abnormality of copper transport. Mice hemizygous for the blotchy allele of the X-linked mottled locus have similar connective-tissue defects as OHS and may represent a mouse model of this disease. We have analyzed the Menkes/mottled copper-transporting ATPase in these two potentially homologous disorders and have identified similar splicing mutations in both. Some expression of normal mRNA was detectable by reverse transcription-PCR in the mutant tissues. These findings contrast with the more debilitating mutations observed in Menkes disease and suggest that low amounts of an otherwise normal protein product could result in the relatively mild phenotype of OHS and of the blotchy mouse.
Collapse
Affiliation(s)
- S Das
- Department of Pediatrics, University of California, San Francisco 94143-0724
| | | | | | | | | | | |
Collapse
|
10
|
Das S, Levinson B, Whitney S, Vulpe C, Packman S, Gitschier J. Diverse mutations in patients with Menkes disease often lead to exon skipping. Am J Hum Genet 1994; 55:883-9. [PMID: 7977350 PMCID: PMC1918324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Fibroblast cultures from 12 unrelated patients with classical Menkes disease were analyzed for mutations in the MNK gene, by reverse transcription-PCR (RT-PCR) and chemical cleavage mismatch detection. Mutations were observed in 10 patients, and in each case a different mutation was present. All of the mutations would be predicted to have adverse effects on protein expression. Mutations that resulted in splicing abnormalities, detected by RT-PCR alone, were observed in six patients and included two splice-site changes, a nonsense mutation, a missense mutation, a small duplication, and a small deletion. Chemical cleavage analysis of the remaining six patients revealed the presence of one nonsense mutation, two adjacent 5-bp deletions, and one missense mutation. A valine/leucine polymorphism was also observed. These findings, combined with the prior observation of deletions in 15%-20% of Menkes patients, suggest that Southern blot hybridization and RT-PCR will identify mutations in the majority of patients.
Collapse
Affiliation(s)
- S Das
- Department of Medicine, University of California, San Francisco
| | | | | | | | | | | |
Collapse
|
11
|
Levinson B, Vulpe C, Elder B, Martin C, Verley F, Packman S, Gitschier J. The mottled gene is the mouse homologue of the Menkes disease gene. Nat Genet 1994; 6:369-73. [PMID: 8054976 DOI: 10.1038/ng0494-369] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The mottled mouse has been proposed as an animal model for Menkes disease, an X-linked disorder of copper transport. The recent isolation of a copper-transporting ATPase gene responsible for Menkes disease has allowed us to test this hypothesis. Here we report the isolation and sequence of the mouse homologue of this gene. We show that two mottled (Mo) alleles, dappled (Modp) and blotchy (Moblo), have abnormalities in the murine mRNA and that Modp has a partial gene deletion. These studies prove that the mottled mouse is the murine model for Menkes disease, providing the basis for future biochemical and therapeutic studies.
Collapse
Affiliation(s)
- B Levinson
- Department of Medicine, University of California, San Francisco 94143-0724
| | | | | | | | | | | | | |
Collapse
|
12
|
Abstract
Although the causes of the abnormal copper utilization seen in Menkes' disease remain unknown, a candidate gene reported by three laboratories has narrowed the search for the defective or missing factor. These genetic studies also suggest that a copper ATPase may be important in normal copper metabolism.
Collapse
Affiliation(s)
- E D Harris
- Department of Biochemistry and Biophysics, Texas A&M University, College Station 77843
| |
Collapse
|
13
|
Vulpe C, Levinson B, Whitney S, Packman S, Gitschier J. Isolation of a candidate gene for Menkes disease and evidence that it encodes a copper-transporting ATPase. Nat Genet 1993; 3:7-13. [PMID: 8490659 DOI: 10.1038/ng0193-7] [Citation(s) in RCA: 950] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Menkes disease is an X-linked disorder of copper transport characterized by progressive neurological degeneration and death in early childhood. We have isolated a candidate gene (Mc1) for Menkes disease and find qualitative or quantitative abnormalities in the mRNA in sixteen of twenty-one Menkes patients. Four patients lacking Mc1RNA showed rearrangements of the Menkes gene. The gene codes for a 1,500 amino acid protein, predicted to be a P-type cation-transporting ATPase. The gene product is most similar to a bacterial copper-transporting ATPase and additionally contains six putative metal-binding motifs at the N-terminus. The gene is transcribed in all cell types tested except liver, consistent with the expression of the Menkes defect.
Collapse
Affiliation(s)
- C Vulpe
- Department of Biochemistry, Howard Hughes Medical Institute, San Francisco, California
| | | | | | | | | |
Collapse
|
14
|
Abstract
Recent studies on Menkes disease are reviewed, focusing especially on copper transport in the cells. A large amount of copper accumulated in the organelle-free cytoplasm, whereas mitochondria were in a state of copper deficiency, indicating that Menkes mutation probably affects copper transport from the cytosol to the organelles in the cells. Microscopic observation of the brain of the macular mouse showed that copper accumulates in the blood vessels. Observation of the brain tissue of the macular mouse after intraventricular administration of copper revealed that copper accumulates in the glia as well as the blood vessels. Copper accumulation was also observed in cultured astrocytes, a type of glial cell, indicating that the affected astrocytes accumulate blood-borne copper and release little of it in the patients with Menkes disease. Thus the effective treatment of Menkes disease could possibly be to release trapped copper from the blood vessels and glia into the neurons.
Collapse
Affiliation(s)
- H Kodama
- Department of Pediatrics, Teikyo University School of Medicine, Tokyo, Japan
| |
Collapse
|
15
|
Yamada T, Suzuki Y, Agui T, Matsumoto K. Elevation of metallothionein gene expression associated with hepatic copper accumulation in Long-Evans Cinnamon mutant rat. BIOCHIMICA ET BIOPHYSICA ACTA 1992; 1131:188-91. [PMID: 1610899 DOI: 10.1016/0167-4781(92)90075-b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The mechanism of the metallothionein (MT) gene expression was investigated in a mutant rat, LEC, which exhibits an abnormal accumulation of copper in hepatocytes. The levels of MT mRNA were extremely high and correlated with the hepatic copper concentrations in LEC rat liver. Gel retardation assays in nuclear extracts from LEC rat liver showed an increase in the copper-dependent binding proteins, which bind to the metal responsive element (MRE) of the MT gene. These results suggest that the high intracellular copper accumulation results in the elevation of the MT gene expression through increasing a putative trans-activating factor in LEC rat.
Collapse
Affiliation(s)
- T Yamada
- Institute for Animal Experimentation, University of Tokushima School of Medicine, Japan
| | | | | | | |
Collapse
|
16
|
Mercer JF, Stevenson T, Wake SA, Mitropoulos G, Camakaris J, Danks DM. Developmental variation in copper, zinc and metallothionein mRNA in brindled mutant and nutritionally copper deficient mice. BIOCHIMICA ET BIOPHYSICA ACTA 1991; 1097:205-11. [PMID: 1681908 DOI: 10.1016/0925-4439(91)90036-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The concentrations of copper, zinc and metallothionein-I (MT-I) mRNA were determined in the liver, kidney and brain of the brindled mutant mouse from birth until the time of death. Despite accumulation of copper in the kidney of the mutant, MT-I mRNA concentrations were normal. There was no difference between the MT-I mRNA in the brain of mutant and normal in the first 10 days of life, but after day 10 metallothionein mRNA levels were increased in the mutant. The concentration of copper was very low in the liver of the mutant, and on day 6 after birth the metallothionein mRNA was also reduced by about 50%. This reduction was not seen in copper-deficient 6-day-old pups, despite very low hepatic copper levels. This suggests that the lower hepatic MT-I mRNA in the day 6 brindled mouse was not simply due to the reduction in hepatic copper and also that hepatic copper is not regulating metallothionein gene expression the liver of neonatal mice. After day 12 hepatic MT-I mRNA levels were elevated in mutant and in copper deficient mice, both of which die at 14 to 16 days. These increases and the increase in brain MT-I mRNA in older mutant mice are likely to be caused by stress. Overall the results support the conclusions that the brindled mutation does not cause a constitutive activation of the metallothionein genes, and that the differences in metallothionein mRNA between mutant and normal are most probably secondary consequences of the mutation.
Collapse
Affiliation(s)
- J F Mercer
- Scobie and Claire Mackinnon Trace Element Laboratory, Murdoch Institute for Research into Birth Defects, Parkville, Victoria, Australia
| | | | | | | | | | | |
Collapse
|
17
|
Palida FA, Ettinger MJ. Identification of proteins involved in intracellular copper metabolism. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(20)64363-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
18
|
Herzberg NH, Wolterman RA, van den Berg GJ, Barth PG, Bolhuis PA. Metallothionein in Menkes' disease: induction in cultured muscle cells. J Neurol Sci 1990; 100:50-6. [PMID: 2089140 DOI: 10.1016/0022-510x(90)90012-c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Menkes' disease is an inherited disturbance of copper metabolism. Addition of copper to the medium of cultured fibroblasts and lymphoblasts from patients with Menkes' disease results in an increased induction of metallothionein. We investigated the metallothionein induction in response to copper and zinc in muscle cells (myoblasts and myotubes). Metallothionein synthesis was analyzed by gel electrophoresis of labeled proteins and metallothionein synthesis in muscle cells was compared with the synthesis in fibroblasts. The induction by copper was higher both in muscle cells and in fibroblasts from the Menkes' patient compared to the control cells. Hybrid myotubes obtained by fusion of control myoblasts and Menkes' myoblasts render a system in which complementation can be studied. Metallothionein synthesis in hybrid myotubes occurred at a level intermediate between the synthesis in Menkes' and control myotubes. The abnormal accumulation of copper-induced metallothionein was only partially corrected by fusion with normal cells. Metallothionein induction by zinc was similar in Menkes' and control fibroblasts. Combination of copper and zinc yielded no differences in additional metallothionein synthesis for Menkes' cells and control fibroblasts. Therefore, metallothionein induction in Menkes' disease can primarily be accounted for by copper rather than by zinc.
Collapse
Affiliation(s)
- N H Herzberg
- Department of Neurology, Academic Medical Centre, Amsterdam, The Netherlands
| | | | | | | | | |
Collapse
|
19
|
Palida FA, Mas A, Arola L, Bethin K, Lonergan PA, Ettinger MJ. Cytosolic copper-binding proteins in rat and mouse hepatocytes incubated continuously with Cu(II). Biochem J 1990; 268:359-66. [PMID: 2363678 PMCID: PMC1131440 DOI: 10.1042/bj2680359] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The proteins that bind copper when it first enters cells are likely to play roles in its intracellular distribution and utilization. When hepatocytes were incubated with 64Cu(II), the time-dependence of the subcellular distribution of 64Cu was consistent with one or more cytosolic proteins distributing copper to the mitochondrial and nuclear fractions. Cytosolic copper was reproducibly distributed among four protein fractions from Sephadex G-150 columns at the earliest time (1 min) and at the lowest concentration used [2 microM-64Cu(II)] with both rat and mouse hepatocytes. Copper binding to proteins in these functions was sensitive to copper metabolic status. Hepatocytes from nutritionally copper-deficient rats or neonatal (9-30 days old) developing rats showed an inverse correlation between copper binding to metallothionein and copper binding to proteins in fraction I (approximately 88 kDa apparent) and fraction II (approximately 38 kDa apparent). The distribution of cytosolic 64Cu from the brindled-mouse model of Menkes disease indicated decreased binding by a protein in fraction I. Brindled-mouse hepatocytes also contain decreased levels of a approximately 55 kDa protein or subunit, which most likely represents a liver-specific secondary response to the primary defect. The results are consistent with one or more copper-binding proteins in fractions I and II having significant functions in intracellular copper metabolism.
Collapse
Affiliation(s)
- F A Palida
- Department of Biochemistry, State University of New York, Buffalo 14214
| | | | | | | | | | | |
Collapse
|
20
|
Waldrop GL, Ettinger MJ. The relationship of excess copper accumulation by fibroblasts from the brindled mouse model of Menkes disease to the primary defect. Biochem J 1990; 267:417-22. [PMID: 2334401 PMCID: PMC1131305 DOI: 10.1042/bj2670417] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fibroblasts from the brindled mouse model of Menkes disease are known to accumulate excess copper. Most of the copper in the cytosol of these fibroblasts is bound to metallothionein (MT), which is elevated in Menkes or brindled mouse fibroblasts. Copper accumulation by normal fibroblasts containing excess MT was examined to determine if the excess copper accumulation phenotype was secondary to excess MT or associated with the primary defect in fibroblasts from the brindled mice. MT was induced in normal fibroblasts by copper, zinc or dexamethasone to levels comparable with those in brindled mice fibroblasts, as determined by radioimmunoassays. Normal fibroblasts containing excess MT accumulate copper normally, i.e. they do not exhibit the excess copper accumulation phenotype. Consistent with this result, copper efflux from normal fibroblasts containing excess MT was also normal. The data suggest that one function of the protein associated with the primary defect is to help determine how much copper is taken up and retained by fibroblasts and other cell types exhibiting the excess copper phenotype in Menkes disease. The capacity of this protein is apparently exceeded in normal fibroblasts if serum or albumin is not present extracellularly to limit total copper uptake. Consistent with a defect in an intracellular protein, the kinetics of copper transport by brindled mice fibroblasts were found to be normal.
Collapse
Affiliation(s)
- G L Waldrop
- Department of Biochemistry, State University of New York, Buffalo 14214
| | | |
Collapse
|
21
|
Cochran FB, Sweetman L, Schmidt K, Barsh G, Kraus J, Packman S. Pyridoxine-unresponsive homocystinuria with an unusual clinical course. AMERICAN JOURNAL OF MEDICAL GENETICS 1990; 35:519-22. [PMID: 2333882 DOI: 10.1002/ajmg.1320350415] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Progressive premature atherosclerosis and associated thromboembolic complications are the main causes of morbidity and mortality in patients with homocystinuria. However, thrombosis is rarely the predominant or presenting manifestation leading to the diagnosis of homocystinuria. We report on an otherwise asymptomatic teenage boy of normal intelligence who had a superior sagittal sinus thrombosis documented by CT and MRI scans. He presented with pneumothoraces, papilledema, and transient right hemiparesis. He subsequently developed empyema and necrotizing pneumonia as well as deep venous thromboses. The diagnosis of pyridoxine-unresponsive homocystinuria was made on the basis of clinical chemistry analyses, enzyme assay, and clinical trial. He has remained symptom-free under treatment with betaine and methionine restriction. We suggest that there exists a subset of patients with pyridoxine-unresponsive homocystinuria who are at risk for thromboembolism, but who may remain undiagnosed because of an otherwise mild clinical course.
Collapse
Affiliation(s)
- F B Cochran
- Department of Pediatrics, University of California, San Francisco 94143
| | | | | | | | | | | |
Collapse
|
22
|
Kodama H, Okabe I, Yanagisawa M, Kodama Y. Copper deficiency in the mitochondria of cultured skin fibroblasts from patients with Menkes syndrome. J Inherit Metab Dis 1989; 12:386-9. [PMID: 2560098 DOI: 10.1007/bf01802032] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The mitochondrial copper concentrations and cytochrome C oxidase activity of the fibroblasts from the patients with Menkes syndrome were investigated. Both the mitochondrial copper concentrations and cytochrome C oxidase activity of fibroblasts from patients with Menkes syndrome were lower than those of the control fibroblasts. These data indicate that the mitochondria of fibroblasts from patients with Menkes syndrome are in a state of copper deficiency. The activity decline of cytochrome C oxidase, a mitochondrial cuproenzyme, seems to be caused by copper deficiency in the mitochondria.
Collapse
Affiliation(s)
- H Kodama
- Department of Pediatrics, Jichi Medical School, Tochigi-ken, Japan
| | | | | | | |
Collapse
|
23
|
Abstract
Kinky hair disease, first described in 1962, is a sex-linked disorder, with its gene located on the long arm of the X chromosome close to the centromere. The condition is marked by intellectural deterioration, seizures, and poorly pigmented, friable hair. Bony changes, resembling scurvy, tortuosities of the cerebral and systemic vasculature, and diverticuli of the bladder are also seen. Biochemically, the most diagnostic alteration is a marked reduction in blood copper and ceruloplasmin levels. The mechanism for the low serum copper has not been defined. Even though parental copper administration will correct the biochemical abnormalities, such treatment will not arrest cerebral deterioration.
Collapse
Affiliation(s)
- J H Menkes
- Department of Neurology and Pediatrics, Reed Neurological Research Center, University of California, Los Angeles 90024
| |
Collapse
|