Abstract
The present study was attempted to identify transcriptionally regulated genes of the normal neurocytes responsive to iron availability. Postnatal rat hippocampus cells were primarily cultured either under the iron-loaded or depleted conditions. These cultured cells were applied for the generation of subtracted complementary DNA libraries by the suppression subtraction hybridization (SSH) and for the subsequent identification of differentially expressed transcripts by reverse Northern blot. The differentially expressed genes were chosen to perform sequencing, and then some of them were performed by Northern blot analysis for observation of their expression in the hippocampus of rats with the different iron status. The results indicated that five unique transcripts were strong candidates for differential expression in cellular iron repletion, one of them is a novel sequence (Genbank No.AF433878), while 26 unique transcripts were strong candidates for differential expression in cellular iron deprivation, one of them is a novel sequence (Genbank No. AY 912101). The revealed known genes responsive to iron availability were previously unknown to respond to iron availability, or have not been determined in the brain, have not even been currently determined in their physiological and biological functions. Interestingly, the proteins encoded by most of the known genes are either directly pointed to or indirectly associated with the molecules that play important, even key roles in cellular signal transduction and the cell cycle. These findings lead to the important suggestion that the cellular responses to iron availability involve extensive transcriptional regulation and cellular signal transduction. Therefore, iron may serve as a signal, which directly and/or indirectly regulates or modulates cell functions.
Similar content being viewed by others
References
Lozoff B, Jimenez E, Wolf AW (1991) Long-term developmental outcome of infants with iron deficiency. N Engl J Med 325:687–694
Walter T, De Andraca I, Chadud P, Perales CG (1989) Iron deficiency anemia: adverse effects on infant psychomotor development. Pediatrics 84:7–17
Pollit E (1989) Behavioral effects of iron deficiency in childhood. Am J Clin Nutr 50:666–667
Aukett MA, Parks YA, Scott PH, Wharton BA (1986) Treatment with iron increases weight gain and psychomotor development. Arch Dis Child 61:849–857
Beard J, Erikson KM, Jones BC (2003) Neonatal iron deficiency results in irreversible changes in dopamine function in rats. J Nutr 133:1174–1179
Pinero D, Jones B, Beard J (2001) Variations in dietary iron alter behavior in developing rats. J Nutr 131:311–318
Youdim MB (2000) Nutrient deprivation and brain function: iron. Nutrition 16:504–508
Xiao DS, Jiang L, Che LL, Lu L (2003) Nitric oxide and iron metabolism in exercised rat with L-arginine supplementation. Mol Cell Biochem 252:65–72
Xiao DS, Ho KP, Qian ZM (2004) Nitric oxide inhibition decreases bleomycin- detectable iron in spleen, bone marrow cells and heart but not in liver in exercise rats. Mol Cell Biochem 260:31–37
Levenson CW (2005) Trace metal regulation of neuronal apoptosis: from genes to behavior. Physiol Behav 86:399–406
Qian ZM, Shen X (2001) Brain iron transport and neurodegeneration. Trends Mol Med 7:103–108
Thomas M, Jankovic J (2004) Neurodegenerative disease and iron storage in the brain. Curr Opin Neurol 17:437–442
Beard JL, Wiesinger JA, Li N, Connor JR (2005) Brain iron uptake in hypotransferrinemic mice: influence of systemic iron status. J Neurosci Res 79:254–261
Mandel S, Grunblatt E, Riederer P, Amariglio N, Jacob-Hirsch J, Rechavi G, Youdim MB (2005) Gene expression profiling of sporadic Parkinson’s disease substantia nigra pars compacta reveals impairment of ubiquitin-proteasome subunits, SKP1A, aldehyde dehydrogenase, and chaperone HSC-70. Ann N Y Acad Sci 1053:356–375
Bradbury MW (1997) Transport of iron in the blood–brain-cerebrospinal fluid system. J Neurochem 69:443–454
Burdo JR, Menzies SL, Simpson IA, Garrick LM, Garrick MD, Dolan KG, Haile DJ, Beard JL, Connor JR (2001) Distribution of divalent metal transporter 1 and metal transport protein 1 in the normal and Belgrade rat. J Neurosci Res 66:1198–2207
Wu LJ, Leenders AG, Cooperman S, Meyron-Holtz E, Smith S, Land W, Tsai RY, Berger UV, Sheng ZH, Rouault TA (2004) Expression of the iron transporter ferroportin in synaptic vesicles and the blood-brain barrier. Brain Res 1001:108–117
Pinero DJ, Li NQ, Connor JR, Beard JL (2000) Variations in dietary iron alter brain iron metabolism in developing rats. J Nutr 130:254–263
Rao R, Tkac I, Townsend EL, Gruetter R, Georgieff MK (2003) Perinatal iron deficiency alters the neurochemical profile of the developing rat hippocampus. J Nutr 133:3215–3221
Rao R, de Ungria M, Sullivan D, Wu P, Wobken JD, Nelson CA, Georgieff MK (1999) Perinatal brain iron deficiency increases the vulnerability of rat hippocampus to hypoxic ischemic insult. J Nutr 129:199–206
Beard J (2003) Iron deficiency alters brain development and functioning. J Nutr 133:1468S–1472S
Jorgenson LA, Wobken JD, Georgieff MK (2003) Perinatal iron deficiency alters apical dendritic growth in hippocampal CA1 pyramidal neurons. Dev Neurosci 25:412–420
Ye Z, Connor JR (2000) Identification of iron responsive genes by screening cDNA libraries from suppression subtractive hybridization with antisense probes from three iron conditions. Nucleic Acids Res 28:1802–1807
Liu Y, Popovich Z, Templeton DM (2005) Global genomic approaches to the iron-regulated proteome. Ann Clin Lab Sci 35:230–239
Moos T, Morgan EH (1998) Evidence for low molecular weight, non-transferrin-bound iron in rat brain and cerebrospinal fluid. J Neurosci Res 54:486–494
Ye Z, Connor JR (1999) Screening of transcriptionally regulated genes following iron chelation in human astrocytoma cells. Biochem Biophys Res Commun 264:709–713
Chua ACG, Olynyk JK, Leedman PJ, Trinder D (2004) Nontransferrin-bound iron uptake by hepatocytes is increased in the Hfe knockout mouse model of hereditary hemochromatosis. Blood 104:1519–1525
Rouault TA (2006) The role of iron regulatory proteins in mammalian iron homeostasis and disease. Nat Chem Biol 2:406–414
Ho KP, Xiao DS, Ke Y, Qian ZM (2001) Exercise decreases cytosolic aconitase activity in the liver, spleen, and bone marrow in rats. Biochem Biophys Res Commun 282:264–267
Pantopoulos K (2004) Iron metabolism and the IRE/IRP regulatory system: an update. Ann N Y Acad Sci 1012:1–13
Sanchez M, Galy B, Dandekar T, Bengert P, Vainshtein Y, Stolte J, Muckenthaler MU, Hentze MW (2006) Iron regulation and the cell cycle: identification of an iron-responsive element in the 3’-untranslated region of human cell division cycle 14A mRNA by a refined microarray-based screening strategy. J Biol Chem 281:22865–22874
Chan LN, Gerhardt EM (1992) Transferrin receptor gene is hyperexpressed and transcriptionally regulated in differentiating erythroid cells. J Biol Chem 267:8254–8259
Wilson SM, Bhattacharyya B, Rachel RA, Coppola V, Tessarollo L, Householder DB, Fletcher CF, Miller RJ, Copeland NG, Jenkins NA (2002) Synaptic defects in ataxia mice result from a mutation in Usp14, encoding a ubiquitin-specific protease. Nat Genet 32:420–425
Anderson C, Crimmins S, Wilson JA, Korbel GA, Ploegh HL, Wilson SM (2005) Loss of Usp14 results in reduced levels of ubiquitin in ataxia mice. J Neurochem 95:724–731
Hanson ES, Rawlins ML, Leibold EA (2003) Oxygen and iron regulation of iron regulatory protein 2. J Biol Chem 278:40337–40342
Iwai K, Klausner RD, Rouault TA (1995) Requirements for iron-regulated degradation of the RNA binding protein, iron regulatory protein 2. EMBO J 14:5350–5357
Velasco G, Grkovic S, Ansieau S (2006) New insights into BS69 functions. J Biol Chem 281:16546–16550
Wan J, Zhang W, Wu L, Bai T, Zhang M, Lo KW, Chui YL, Cui Y, Tao Q, Yamamoto M, Akira S, Wu Z (2006) BS69, a specific adaptor in the latent membrane protein 1-mediated c-Jun N-terminal kinase pathway. Mol Cell Biol 26:448–456
Isobe T, Uchida C, Hattori T, Kitagawa K, Oda T, Kitagawa M (2006) Ubiquitin-dependent degradation of adenovirus E1A protein is inhibited by BS69. Biochem Biophys Res Commun 339:367–374
Yang YH, Zhao M, Li WM, Lu YY, Chen YY, Kang B, Lu YY (2006) Expression of programmed cell death 5 gene involves in regulation of apoptosis in gastric tumor cells. Apoptosis 11:993–1001
Cheng AX, Lou SQ, Zhou HW, Wang Y, Ma DL (2004) Expression of PDCD5, a novel apoptosis related protein, in human osteoarthritic cartilage. Acta Pharmacol Sin 25:685–690
Bolte M, Steigemann P, Braus GH, Irniger S (2002) Inhibition of APC-mediated proteolysis by the meiosis-specific protein kinase Ime2. Proc Natl Acad Sci 99:4385–4390
Mizuno K, Tokumasu A, Nakamura A, Hayashi Y, Kojima Y, Kohri K, Noce T (2006) Genes associated with the formation of germ cells from embryonic stem cells in cultures containing different glucose concentrations. Mol Reprod Dev 73:437–445
Parfait B, Giovangrandi Y, Asheuer M, Laurendeau I, Olivi M, Vodovar N, Vidaud D, Vidaud M, Bieche I (2000) Human TIP49b/RUVBL2 gene: genomic structure, expression pattern, physical link to the human CGB/LHB gene cluster on chromosome 19q13.3. Ann Genet 43:69–74
Nilsson J, Sengupta J, Frank J, Nissen P (2004) Regulation of eukaryotic translation by the RACK1 protein: a platform for signalling molecules on the ribosome. EMBO Rep 5:1137–1141
Snider MD (2003) A role for rab7 GTPase in growth factor-regulated cell nutrition and apoptosis. Mol Cell 12:796–797
Weimer JM, Custer AW, Benedict JW, Alexander NA, Kingsley E, Federoff HJ, Cooper JD, Pearce DA (2006) Visual deficits in a mouse model of Batten disease are the result of optic nerve degeneration and loss of dorsal lateral geniculate thalamic neurons. Neurobiol Dis 22:284–293
Schroer TA (2004) Dynactin. Annu Rev Cell Dev Biol 20:759–779
Acknowledgments
This study was granted by: Project 30270639 supported by National Natural Science Foundation of China, BS2003022 supported by the Jiangsu Science and Techno1ogy Department, China, and 02JDG028 supported by the Doctoral Research Foundation of the Jiangsu University, China.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Liu, M., Xiao, DS. & Qian, ZM. Identification of transcriptionally regulated genes in response to cellular iron availability in rat hippocampus. Mol Cell Biochem 300, 139–147 (2007). https://doi.org/10.1007/s11010-006-9377-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11010-006-9377-2