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Abd El-Twab SM, Abdul-Hamid M. Curcumin mitigates lithium-induced thyroid dysfunction by modulating antioxidant status, apoptosis and inflammatory cytokines. THE JOURNAL OF BASIC & APPLIED ZOOLOGY 2016; 76:7-19. [DOI: 10.1016/j.jobaz.2016.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Freestone D, Cater MA, Ackland ML, Paterson D, Howard DL, de Jonge MD, Michalczyk A. Copper and lactational hormones influence the CTR1 copper transporter in PMC42-LA mammary epithelial cell culture models. J Nutr Biochem 2013; 25:377-87. [PMID: 24485600 DOI: 10.1016/j.jnutbio.2013.11.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 10/23/2013] [Accepted: 11/22/2013] [Indexed: 01/30/2023]
Abstract
Adequate amounts of copper in milk are critical for normal neonatal development, however the mechanisms regulating copper supply to milk have not been clearly defined. PMC42-LA cell cultures representative of resting, lactating and suckled mammary epithelia were used to investigate the regulation of the copper uptake protein, CTR1. Both the degree of mammary epithelial differentiation (functionality) and extracellular copper concentration greatly impacted upon CTR1 expression and its plasma membrane association. In all three models (resting, lactating and suckling) there was an inverse correlation between extracellular copper concentration and the level of CTR1. Cell surface biotinylation studies demonstrated that as extracellular copper concentration increased membrane associated CTR1 was reduced. There was a significant increase in CTR1 expression (total and membrane associated) in the suckled gland model in comparison to the resting gland model, across all copper concentrations investigated (0-50 μM). Regulation of CTR1 expression was entirely post-translational, as quantitative real-time PCR analyses showed no change to CTR1 mRNA between all models and culture conditions. X-ray fluorescence microscopy on the differentiated PMC42-LA models revealed that organoid structures distinctively accumulated copper. Furthermore, as PMC42-LA cell cultures became progressively more specialised, successively more copper accumulated in organoids (resting<lactating<suckling), indicating a link between function and copper requirement. Based on previous data showing a function for CTR1 in copper uptake, we have concluded that under the influence of hormones and increased extracellular copper levels, CTR1 participates in uptake of copper by mammary epithelial cells, as a prerequisite for secretion of copper into milk.
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Affiliation(s)
- David Freestone
- Centre for Cellular and Molecular Biology, School of Life and Environmental Sciences, Deakin University, Burwood, Victoria 3121, Australia
| | - Michael A Cater
- Centre for Cellular and Molecular Biology, School of Life and Environmental Sciences, Deakin University, Burwood, Victoria 3121, Australia; Department of Pathology, the University of Melbourne, Parkville, Victoria 3010, Australia
| | - M Leigh Ackland
- Centre for Cellular and Molecular Biology, School of Life and Environmental Sciences, Deakin University, Burwood, Victoria 3121, Australia
| | - David Paterson
- Australian Synchrotron, Melbourne, Victoria 3068, Australia
| | - Daryl L Howard
- Australian Synchrotron, Melbourne, Victoria 3068, Australia
| | | | - Agnes Michalczyk
- Centre for Cellular and Molecular Biology, School of Life and Environmental Sciences, Deakin University, Burwood, Victoria 3121, Australia.
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Akane H, Saito F, Yamanaka H, Shiraki A, Imatanaka N, Akahori Y, Morita R, Mitsumori K, Shibutani M. Methacarn as a whole brain fixative for gene and protein expression analyses of specific brain regions in rats. J Toxicol Sci 2013; 38:431-43. [PMID: 23665942 DOI: 10.2131/jts.38.431] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
For molecular analysis in anatomically-specific brain regions for rodent studies, it is necessary to establish a fast and accurate procedure for tissue sampling to achieve high integrity and expression fidelity of extracted molecules. The present study was performed to examine suitability of whole brain fixation with methacarn and subsequent tissue sampling using punch-biopsy devices for gene expression analysis in rats. After fixation, each specific region, i.e., hippocampal dentate gyrus, corpus callosum, cingulate cortex or cerebellar vermis was collected, and the integrity and variability of expression data of extracted total RNAs and polypeptides were examined. Methacarn fixation, acetone fixation, and unfixed tissues were compared. Methacarn fixation resulted in high integrity of total RNAs sufficient for conducting global expression analysis and superior in terms of uniformity in the integrity among brain regions to that of acetone fixation. Extracted polypeptide after methacarn fixation revealed similar integrity to that without fixation or with acetone fixation. Methacarn fixation resulted in lower mRNA expression variability between samples than acetone fixation in microarray analysis. The fidelity of polypeptide expression was mostly equivalent between methacarn and acetone fixation in 2-dimensional differential in-gel electrophoresis, although the expression levels of a small number of polypeptides from acetone-fixed tissues were affected. These results suggest that whole brain fixation with methacarn retains advantages for global analyses of mRNAs and polypeptides in rodent studies.
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Affiliation(s)
- Hirotoshi Akane
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Japan
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Fujimoto H, Woo GH, Morita R, Itahashi M, Akane H, Nishikawa A, Shibutani M. Increased cellular distribution of vimentin and ret in the cingulum of rat offspring after developmental exposure to decabromodiphenyl ether or 1,2,5,6,9,10-hexabromocyclododecane. J Toxicol Pathol 2013; 26:119-29. [PMID: 23914054 PMCID: PMC3695334 DOI: 10.1293/tox.26.119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Accepted: 01/04/2013] [Indexed: 01/19/2023] Open
Abstract
Abstract: To determine effects of developmental exposure to brominated flame
retardants (BFRs), weak thyroid hormone disruptors, on white matter development, white
matter-specific global gene expression analysis was performed using microdissection
techniques and microarrays in male rats exposed maternally to decabromodiphenyl ether
(DBDE), one of the representative BFRs, at 10, 100 or 1000 ppm. Based on previous gene
expression profiles of developmental hypothyroidism and DBDE-exposed cases,
vimentin+ immature astrocytes and ret proto-oncogene (Ret)+
oligodendrocytes were immunohistochemically examined after developmental exposure to
representative BFRs, i.e., DBDE, 1,2,5,6,9,10-hexabromocyclododecane (HBCD; 100, 1000 or
10,000 ppm) and tetrabromobisphenol A (TBBPA; 100, 1000 or 10,000 ppm).
Vimentin+ and Ret+ cell populations increased at ≥ 100 ppm and ≥
10 ppm DBDE, respectively. Vimentin+ and Ret+ cells increased at ≥
1000 ppm HBCD, with no effect of TBBPA. The highest dose of DBDE and HBCD revealed subtle
fluctuations in serum thyroid-related hormone concentrations. Thus, DBDE and HBCD may
exert direct effects on glial cell development at ≥ middle doses. At high doses,
hypothyroidism may additionally be an inducing mechanism, although its contribution is
rather minor.
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Affiliation(s)
- Hitoshi Fujimoto
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
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Increased cellular distribution of vimentin and Ret in the cingulum induced by developmental hypothyroidism in rat offspring maternally exposed to anti-thyroid agents. Reprod Toxicol 2012; 34:93-100. [DOI: 10.1016/j.reprotox.2012.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Revised: 02/19/2012] [Accepted: 03/16/2012] [Indexed: 12/16/2022]
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Taniai E, Yafune A, Kimura M, Morita R, Nakane F, Suzuki K, Mitsumori K, Shibutani M. Fluctuations in cell proliferation, apoptosis, and cell cycle regulation at the early stage of tumor promotion in rat two-stage carcinogenesis models. J Toxicol Sci 2012. [DOI: 10.2131/jts.37.1113] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Eriko Taniai
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
- Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
| | - Atsunori Yafune
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
- Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
| | - Masayuki Kimura
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Reiko Morita
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
- Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
| | - Fumiyuki Nakane
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Kazuhiko Suzuki
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Kunitoshi Mitsumori
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Makoto Shibutani
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
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Mizukami S, Ichimura R, Kemmochi S, Wang L, Taniai E, Mitsumori K, Shibutani M. Tumor promotion by copper-overloading and its enhancement by excess iron accumulation involving oxidative stress responses in the early stage of a rat two-stage hepatocarcinogenesis model. Chem Biol Interact 2010; 185:189-201. [DOI: 10.1016/j.cbi.2010.03.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 03/07/2010] [Accepted: 03/09/2010] [Indexed: 11/27/2022]
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Ago K, Saegusa Y, Nishimura J, Dewa Y, Kemmochi S, Kawai M, Harada T, Mitsumori K, Shibutani M. Involvement of glycogen synthase kinase-3β signaling and aberrant nucleocytoplasmic localization of retinoblastoma protein in tumor promotion in a rat two-stage thyroid carcinogenesis model. ACTA ACUST UNITED AC 2010; 62:269-80. [DOI: 10.1016/j.etp.2009.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 04/04/2009] [Accepted: 04/18/2009] [Indexed: 10/20/2022]
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SAEGUSA Y, WOO GH, FUJIMOTO H, INOUE K, TAKAHASHI M, HIROSE M, IGARASHI K, KANNO J, MITSUMORI K, NISHIKAWA A, SHIBUTANI M. Gene Expression Profiling and Cellular Distribution of Molecules with Altered Expression in the Hippocampal CA1 Region after Developmental Exposure to Anti-Thyroid Agents in Rats. J Vet Med Sci 2010; 72:187-95. [DOI: 10.1292/jvms.09-0396] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Yukie SAEGUSA
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
- Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
| | - Gye-Hyeong WOO
- Division of Pathology, National Institute of Health Sciences
| | | | - Kaoru INOUE
- Division of Pathology, National Institute of Health Sciences
| | - Miwa TAKAHASHI
- Division of Pathology, National Institute of Health Sciences
| | - Masao HIROSE
- Division of Pathology, National Institute of Health Sciences
- Food Safety Commission, Akasaka Park Bld
| | | | - Jun KANNO
- Division of Molecular Toxicology, National Institute of Health Sciences
| | - Kunitoshi MITSUMORI
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | | | - Makoto SHIBUTANI
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
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Induction of GST-P-positive proliferative lesions facilitating lipid peroxidation with possible involvement of transferrin receptor up-regulation and ceruloplasmin down-regulation from the early stage of liver tumor promotion in rats. Arch Toxicol 2009; 84:319-31. [PMID: 20091025 DOI: 10.1007/s00204-009-0496-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Accepted: 11/30/2009] [Indexed: 10/20/2022]
Abstract
To elucidate the role of metal-related molecules in hepatocarcinogenesis, we examined immunolocalization of transferrin receptor (Tfrc), ceruloplasmin (Cp) and metallothionein (MT)-1/2 in relation to liver cell foci positive for glutathione-S-transferase placental form (GST-P) in the early stage of tumor promotion by fenbendazole (FB), phenobarbital, piperonyl butoxide or thioacetamide in a rat two-stage hepatocarcinogenesis model. To estimate the involvement of oxidative stress responses to the promotion, immunolocalization of 4-hydroxy-2-nonenal, malondialdehyde and acrolein was similarly examined. Our findings showed that MT-1/2 immunoreactivity was not associated with the cellular distribution of GST-P and proliferating cell nuclear antigen, suggesting no role of MT-1/2 in hepatocarcinogenesis. We also found enhanced expression of Tfrc after treatment with strong tumor-promoting chemicals. With regard to Cp, the population showing down-regulation was increased in the GST-P-positive foci in relation to tumor promotion. Up-regulation of Tfrc and down-regulation of Cp was maintained in GST-P-positive neoplastic lesions induced after long-term promotion with FB, suggesting the expression changes occurring downstream of the signaling pathway involved in the formation of GST-P-positive lesions. Furthermore, enhanced accumulation of lipid peroxidation end products was observed in the GST-P-positive foci by promotion. Post-initiation treatment with peroxisome proliferator-activated receptor alpha agonists did not enhance any such distribution changes in GST-P-negative foci. The results thus suggest that facilitation of lipid peroxidation is involved in the induction of GST-P-positive lesions by tumor promotion from an early stage, and up-regulation of Tfrc and down-regulation of Cp may be a signature of enhanced oxidative cellular stress in these lesions.
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Modification of dietary copper levels on the early stage of tumor-promotion with propylthiouracil in a rat two-stage thyroid carcinogenesis model. Chem Biol Interact 2009; 180:262-70. [DOI: 10.1016/j.cbi.2009.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 02/05/2009] [Accepted: 02/05/2009] [Indexed: 11/21/2022]
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