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Yeo S, An KS, Hong YM, Choi YG, Rosen B, Kim SH, Lim S. Neuroprotective changes in degeneration-related gene expression in the substantia nigra following acupuncture in an MPTP mouse model of Parkinsonism: Microarray analysis. Genet Mol Biol 2015; 38:115-27. [PMID: 25983633 PMCID: PMC4415566 DOI: 10.1590/s1415-475738120140137] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 09/17/2014] [Indexed: 01/12/2023] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder characterized by the death of dopamine-generating cells in the substantia nigra (SN). Acupuncture stimulation results in an enhanced survival of dopaminergic neurons in the SN in Parkinsonism animal models. The present study investigated changes in gene expression profiles measured using whole transcript array in the SN region related to the inhibitory effects of acupuncture in a chronic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) Parkinsonism model. In this model, acupuncture stimulation at GB34 and LR3 attenuated the decrease in tyrosine hydroxylase in the SN region; stimulation at non-acupoints did not suppress this decrease. Gene array analysis revealed that 22 (10 annotated genes: Cdh1, Itih2, Mpzl2, Rdh9, Serping1, Slc6a13, Slc6a20a, Slc6a4, Tph2, and Ucma) probes that were up-regulated in MPTP animals relative to controls were exclusively down-regulated by acupuncture stimulation. In addition, 17 (two annotated genes: 4921530L21Rik and Gm13931) probes that were down-regulated in MPTP animals compared to controls were exclusively up-regulated by acupuncture stimulation. These findings indicate that the 39 probes (12 annotated genes) affected by MPTP and acupuncture may be responsible for the inhibitory effects of acupuncture on degeneration-related gene expression in the SN following damage induced by MPTP intoxication.
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Affiliation(s)
- Sujung Yeo
- Research Group of Pain and Neuroscience, WHO Collaborating Center for
Traditional Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul,
Republic of Korea
- Department of Basic Korean Medical Science, College of Korean Medicine,
Kyung Hee University, Seoul, Republic of Korea
| | - Keon Sang An
- Department of Basic Korean Medical Science, College of Korean Medicine,
Kyung Hee University, Seoul, Republic of Korea
| | - Yeon-Mi Hong
- Research Group of Pain and Neuroscience, WHO Collaborating Center for
Traditional Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul,
Republic of Korea
- Department of Basic Korean Medical Science, College of Korean Medicine,
Kyung Hee University, Seoul, Republic of Korea
| | - Yeong-Gon Choi
- Research Group of Pain and Neuroscience, WHO Collaborating Center for
Traditional Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul,
Republic of Korea
- Department of Basic Korean Medical Science, College of Korean Medicine,
Kyung Hee University, Seoul, Republic of Korea
| | - Bruce Rosen
- Department of Basic Korean Medical Science, College of Korean Medicine,
Kyung Hee University, Seoul, Republic of Korea
- Department of Radiology, Athinoula A. Martinos Center for Biomedical
Imaging, Massachusetts General Hospital, Harvard Medical School, Boston,
USA
| | - Sung-Hoon Kim
- Department of Basic Korean Medical Science, College of Korean Medicine,
Kyung Hee University, Seoul, Republic of Korea
| | - Sabina Lim
- Research Group of Pain and Neuroscience, WHO Collaborating Center for
Traditional Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul,
Republic of Korea
- Department of Basic Korean Medical Science, College of Korean Medicine,
Kyung Hee University, Seoul, Republic of Korea
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Involvement of retinol dehydrogenase 10 in embryonic patterning and rescue of its loss of function by maternal retinaldehyde treatment. Proc Natl Acad Sci U S A 2011; 108:16687-92. [PMID: 21930923 DOI: 10.1073/pnas.1103877108] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Retinoic acid (RA), an active vitamin A metabolite, is a key signaling molecule in vertebrate embryos. Morphogenetic RA gradients are thought to be set up by tissue-specific actions of retinaldehyde dehydrogenases (RALDHs) and catabolizing enzymes. According to the species, two enzymatic pathways (β-carotene cleavage and retinol oxidation) generate retinaldehyde, the substrate of RALDHs. Placental species depend on maternal retinol transferred to the embryo. The retinol-to-retinaldehyde conversion was thought to be achieved by several redundant enzymes; however, a random mutagenesis screen identified retinol dehydrogenase 10 [Rdh10(Trex) allele; Sandell LL, et al. (2007) Genes Dev 21:1113-1124] as responsible for a homozygous lethal phenotype with features of RA deficiency. We report here the production and characterization of unique murine Rdh10 loss-of-function alleles generated by gene targeting. We show that although Rdh10(-/-) mutants die at an earlier stage than Rdh10(Trex) mutants, their molecular patterning defects do not reflect a complete state of RA deficiency. Furthermore, we were able to correct most developmental abnormalities by administering retinaldehyde to pregnant mothers, thereby obtaining viable Rdh10(-/-) mutants. This demonstrates the rescue of an embryonic lethal phenotype by simple maternal administration of the missing retinoid compound. These results underscore the importance of maternal retinoids in preventing congenital birth defects, and lead to a revised model of the importance of RDH10 and RALDHs in controlling embryonic RA distribution.
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Hogarth CA, Amory JK, Griswold MD. Inhibiting vitamin A metabolism as an approach to male contraception. Trends Endocrinol Metab 2011; 22:136-44. [PMID: 21277790 PMCID: PMC3070762 DOI: 10.1016/j.tem.2011.01.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/03/2011] [Accepted: 01/04/2011] [Indexed: 12/30/2022]
Abstract
Although oral contraceptives have been available to women since the 1960s, contraceptive options for men have remained limited. Spermatogenesis relies on the active metabolite of vitamin A, retinoic acid, to drive spermatogonial differentiation and to allow the production of normal numbers of sperm. Recent evidence describes how the enzymes which control vitamin A metabolism in the testis could be targeted to generate effective male contraceptives; however, the detailed mechanism(s) regarding how vitamin A regulates normal spermatogenesis are still unknown. The essential nature of vitamin A to male germ cell development and the prospects of developing the proteins responsible for the generation, transport, and storage of retinoic acid as targets for male contraceptive development are discussed in this review.
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Affiliation(s)
- Cathryn A. Hogarth
- School of Molecular Biosciences, Washington State University, Pullman, Washington, USA
| | - John K. Amory
- University of Washington Medical Center, University of Washington, Seattle, Washington, USA
| | - Michael D. Griswold
- School of Molecular Biosciences, Washington State University, Pullman, Washington, USA
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Abstract
Numerous physiological processes require retinoids, including development, nervous system function, immune responsiveness, proliferation, differentiation, and all aspects of reproduction. Reliable retinoid quantification requires suitable handling and, in some cases, resolution of geometric isomers that have different biological activities. Here we describe procedures for reliable and accurate quantification of retinoids, including detailed descriptions for handling retinoids, preparing standard solutions, collecting samples and harvesting tissues, extracting samples, resolving isomers, and detecting with high sensitivity. Sample-specific strategies are provided for optimizing quantification. Approaches to evaluate assay performance also are provided. Retinoid assays described here for mice also are applicable to other organisms including zebrafish, rat, rabbit, and human and for cells in culture. Retinoid quantification, especially that of retinoic acid, should provide insight into many diseases, including Alzheimer's disease, type 2 diabetes, obesity, and cancer.
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Parés X, Farrés J, Kedishvili N, Duester G. Medium- and short-chain dehydrogenase/reductase gene and protein families : Medium-chain and short-chain dehydrogenases/reductases in retinoid metabolism. Cell Mol Life Sci 2008; 65:3936-49. [PMID: 19011747 PMCID: PMC2654207 DOI: 10.1007/s00018-008-8591-3] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Retinoic acid (RA), the most active retinoid, is synthesized in two steps from retinol. The first step, oxidation of retinol to retinaldehyde, is catalyzed by cytosolic alcohol dehydrogenases (ADHs) of the medium-chain dehydrogenase/reductase (MDR) superfamily and microsomal retinol dehydrogenases (RDHs) of the short-chain dehydrogenase/reductase (SDR) superfamily. The second step, oxidation of retinaldehyde to RA, is catalyzed by several aldehyde dehydrogenases. ADH1 and ADH2 are the major MDR enzymes in liver retinol detoxification, while ADH3 (less active) and ADH4 (most active) participate in RA generation in tissues. Several NAD(+)- and NADP(+)-dependent SDRs are retinoid active. Their in vivo contribution has been demonstrated in the visual cycle (RDH5, RDH12), adult retinoid homeostasis (RDH1) and embryogenesis (RDH10). K(m) values for most retinoid-active ADHs and RDHs are close to 1 microM or lower, suggesting that they participate physiologically in retinol/retinaldehyde interconversion. Probably none of these enzymes uses retinoids bound to cellular retinol-binding protein, but only free retinoids. The large number of enzymes involved in the two directions of this step, also including aldo-keto reductases, suggests that retinaldehyde levels are strictly regulated.
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Affiliation(s)
- X Parés
- Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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Belyaeva OV, Johnson MP, Kedishvili NY. Kinetic analysis of human enzyme RDH10 defines the characteristics of a physiologically relevant retinol dehydrogenase. J Biol Chem 2008; 283:20299-308. [PMID: 18502750 PMCID: PMC2459273 DOI: 10.1074/jbc.m800019200] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2008] [Revised: 05/22/2008] [Indexed: 11/06/2022] Open
Abstract
Human retinol dehydrogenase 10 (RDH10) was implicated in the oxidation of all-trans-retinol for biosynthesis of all-trans-retinoic acid, however, initial assays suggested that RDH10 prefers NADP(+) as a cofactor, undermining its role as an oxidative enzyme. Here, we present evidence that RDH10 is, in fact, a strictly NAD(+)-dependent enzyme with multisubstrate specificity that recognizes cis-retinols as well as all-trans-retinol as substrates. RDH10 has a relatively high apparent K(m) value for NAD(+) (~100 microm) but the lowest apparent K(m) value for all-trans-retinol (~0.035 microm) among all NAD(+)-dependent retinoid oxidoreductases. Due to its high affinity for all-trans-retinol, RDH10 exhibits a greater rate of retinol oxidation in the presence of cellular retinol-binding protein type I (CRBPI) than human microsomal RoDH4, but like RoDH4, RDH10 does not recognize retinol bound to CRBPI as a substrate. Consistent with its preference for NAD(+), RDH10 functions exclusively in the oxidative direction in the cells, increasing the levels of retinaldehyde and retinoic acid. Targeted small interfering RNA-mediated silencing of endogenous RDH10 or RoDH4 expression in human cells results in a significant decrease in retinoic acid production from retinol, identifying both human enzymes as physiologically relevant retinol dehydrogenases. The dual cis/trans substrate specificity suggests a dual physiological role for RDH10: in the biosynthesis of 11-cis-retinaldehyde for vision as well as the biosynthesis of all-trans-retinoic acid for differentiation and development.
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Affiliation(s)
- Olga V Belyaeva
- Department of Biochemistry and Molecular Genetics, Schools of Medicine and Dentistry, University of Alabama, Birmingham, AL 35294, USA
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Bibliography. Current world literature. Adrenal cortex. Curr Opin Endocrinol Diabetes Obes 2008; 15:284-299. [PMID: 18438178 DOI: 10.1097/med.0b013e3283040e80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kane MA, Folias AE, Napoli JL. HPLC/UV quantitation of retinal, retinol, and retinyl esters in serum and tissues. Anal Biochem 2008; 378:71-9. [PMID: 18410739 DOI: 10.1016/j.ab.2008.03.038] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Revised: 03/20/2008] [Accepted: 03/20/2008] [Indexed: 12/22/2022]
Abstract
We report robust HPLC/UV methods for quantifying retinyl esters (RE), retinol (ROL), and retinal (RAL) applicable to diverse biological samples with lower limits of detection of 0.7, 0.2, and 0.2 pmol, respectively, and linear ranges greater than 3 orders of magnitude. These assays function well with small, complex biological samples (10-20mg tissue). Coefficients of variation range from 5.9 to 10.0% (intraday) and from 5.9 to 11.0% (interday). Quantification of endogenous RE, ROL, and RAL in mouse serum and tissues (liver, kidney, adipose, muscle, spleen, testis, skin, brain, and brain regions) reveals utility. Ability to discriminate spatial concentrations of ROL and RE is illustrated with C57BL/6 mouse brain loci (hippocampus, cortex, olfactory bulb, thalamus, cerebellum, and striatum). We also developed a method to distinguish isomeric forms of ROL to investigate precursors of retinoic acid. The ROL isomer assay has limits of detection between 3.5 and 4.5 pmol and has a linear range and coefficient of variation similar to those of the ROL/RE and RAL assays. The assays described here provide for sensitive and rigorous quantification of endogenous RE, ROL, and RAL to elucidate retinoid homeostasis in disease states such as Alzheimer's disease, type 2 diabetes, obesity, and cancer.
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Affiliation(s)
- Maureen A Kane
- Department of Nutritional Science and Toxicology, University of California, Berkeley, CA 94720, USA
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