Genomic Bases of Memory and Neuronal Evolution
Leonid L. Moroz
Professor of Neuroscience, Biology and Chemistry
Email:
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Our laboratory works to characterize basic mechanisms underlying the design of nervous systems and evolution of neuronal signaling mechanisms. The major questions are: (1) why are individual neurons so different from each other, (2) how do they maintain such precise connections between each other, (3) how does this fixed wiring result in such enormous neuronal plasticity and (4) how does this contribute to learning and memory mechanisms? By taking advantage of relatively simpler nervous systems of invertebrate animal models, we combine neuroscience,genomics, bioinformatics, evolutionary theory, zoology, molecular biology, microanalytical chemistry and nanoscience to understand how neurons operate, learn and remember.
Current Projects
As part of the NIH Center of Excellence in Genomic Sciences, our first project investigates the genomic bases of neuronal identity and plasticity. Due to the tremendous difficulties in mapping single cells and processes in the mammalian brain, we study the giant neurons of the sea slug Aplysia californica, a well-established model organism for cellular neuroscience. Our objective is to investigate nearly all messenger RNA (mRNA) involved in simple feeding and defensive networks.
Genomic Bases of Neuronal Identity and Plasticity. This year we have completed our collection and initial inventory of Aplysia neuronal mRNAs from identified neurons and even from their individual processes and growth cones. In collaboration with Columbia University (J. Ju and E. Kandel), we have generated more than 230,000 molecular markers of expressed genes (ESTs) and identified thousands of unique Aplysia genes operating in the central nervous system. These include genes associated with neurodevelopment, synaptogenesis and memory. We also identified several dozen genes homologous to those associated with human diseases such as Alzheimer's disease and causes of mental retardation (the Alzheimer's disease related protein and the Fragile X mental retardation protein). We are analyzing the functional role of these novel and critical genes using Aplysia-specific microarrays, in situ hybridization, capillary electrophoresis, confocal and time-lapse imaging and microelectrode techniques. These technologies are integrated to elucidate the entire molecular machinery of a living neuron. The neuronal transcriptome of Aplysia has been published. For more informationa and to view the abstract, click here. Our lab has also embarked on a project, supported by NIH, to sequence the entire Aplysia genome. Click here to find out more.
Development of Innovative Bionanotechnologies for Direct Single Cell Genomic and Microchemical Analysis. We are working to reveal the complex, large-scale molecular machinery of individual neurons by monitoring, at real physiological time, the activity of thousands of genes and hundreds of metabolites in the cell. Our goal is to identify a set of genes that determine neuronal identity and control long-term nervous system modifications such as injury, learning and memory. Although we have succeeded with single neuron gene expression profiling using custom made microarrays, real-time measurements and large-scale metabolite proofing is a desired but not yet achieved goal. As the first step in this direction, we are developing a new generation of intracellular sensors called molecular beacons (in collaboration with J. Ju, N. Turro and W. Tan), for direct imaging of native mRNAs in living neurons and synapses in real physiological time. These new probes allow us to monitor mRNA trafficking and relocation in both cell culture and intact ganglia as neurons learn and remember. We also continue to use microanalytical approaches to detect and measure microscopic quantities of important chemicals in neurons. The primary technique, capillary electrophoresis, is so exquisitely sensitive that less than 0.01 of the volume of a cell is all that is required for a detailed chemical analysis of its contents. Developing (in collaboration with Jonathan Sweedler) and extending these microchemical technologies to other cell types and multiple metabolites (the neuronal "metabolome") as well as their integration to real-time electrophysiological analysis (by on-line sampling of cytoplasm) are our goals for the coming years.
Comparative Neurobiology Projects.
The third project focuses on physiological mechanisms and evolution of gaseous signaling in the nervous system. Nitric oxide (NO) is a signaling molecule involved in a myriad of biological functions. Nerve cells that produce NO, the most mysterious and least analyzed population of cells in the brain, are now our primary research target. Recently, we identified and mapped these neurons, successfully isolating genes involved in NO synthesis in molluscs, lower chordates and cnidarians. We are now examining how NO acts in neuronal networks. Gaseous transmission has been reconstructed in cell culture where we have started to create a molecular portrait of a nitrergic neuron and identify targets of NO action. The emerging picture is that NO can be highly compartmentalized in a neuron, yet it might affect numerous signaling pathways by direct and indirect interaction with other cellular messengers. Finally, we discovered that in certain neurons NO can be generated by a non-enzymatic mechanism via nitrite-ascorbate interactions, and we continue to characterize this non-traditional mechanism of NO synthesis in cells.
The goal of our fourth project is to use comparative strategies to determine what genes define neurons, focusing upon basal animal groups. First, we make and sequence cDNA libraries from Trichoplax, having the simplest organization of any known animal, with only four distinguishable cell types, but with prominent social behavior. Second, this year we started to sequence Xenoturbella, an enigmatic marine organism that is considered as the representative of the most basal deuterostome group with a nervous system in the form of a nerve net. Finally, we use larval nervous systems from molluscs and echinoderms as important outgroups in this genomic screening. Such an approach will provide a foundation for phylogenetic analysis of gene loss and gain in both basal and more derived nervous systems and identify a subset of neuron-specific genes. These projects are performed in collaboration with Profs. P. Anderson and B. Battelle. The goals of the research are twofold: to establish novel genomic models and to understand the molecular basis and evolution of major signaling pathways focusing on the identification of evolution's most conserved mechanisms of neuronal identity and plasticity as well as trends leading to innovations in neuronal functions.
Personnel:
- Dr. Leonid L. Moroz – Professor of Neuroscience
- Dr. Andrea Kohn – Molecular/Genome Biologist
- James C. Netherton III, Chemist – Chemistry, Lab Management
- Matt Citarella – Graduate Student
- Yelena Bobkova – Biological Scientist
Selected Publications
Moroz LL, Kohn AB (2010) The diversity of enzymatic and non-enzymatic pathways of nitric oxide synthesis and signaling: from evolutionary biology to memory mechanisms. Frontiers in Biosciences: in press.
Moroz LL, Kohn AB (2010) Do different neurons age differently? Direct genome-wide analysis of aging in single identified cholinergic neurons. Front Aging Neurosci 19:2 pp6
Choi, S.L., Lee, Y.S., Rim, Y.S., Kim, T.H., Moroz, L.L., Kandel, E.R., Bhak, J. and Kaang, B.K. (2010) Differential evolutionary rates of neuronal transcriptome in Aplysia kurodai and Aplysia californica as a tool for gene mining. J Neurogenet 24: 75-82.
Heyland, A., Goodall, S., Sohn, D., Leys, S. and Moroz, L.L. (2010) Neurotransmitter functions in the placozoan Trichoplax adherens. Integrative and Comparative Biology 50: E74-E75.
Heyland, A., Vue, Z., Voolstra, C.R., Medina, M. and Moroz, L.L. (In press) Developmental transcriptome of Aplysia californica. J Exp Zool B Mol Dev Evol 316B.
Moroz, L.L. (2010) The Devolution of Evolution. The Scientist 24: 36-37.
Moroz, L.L. (In press) Aplysia. Curr Bio. 21.
Moroz, L.L. and Kohn, A.B. (2010) Do different neurons age differently? Direct genome-wide analysis of aging in single identified cholinergic neurons. Frontiers in Aging Neuroscience 2: 1-18.
Moroz, L.L. and Kohn, A.B. (In press) Parallel evolution of nitric oxide signaling: diversity of synthesis & memory pathways. Frontiers in Biosciences.
Moroz, L.L. and Kohn, A.B. (In press) The diversity of enzymatic and non-enzymatic pathways of nitric oxide synthesis and signaling: from evolutionary biology to memory mechanisms. Frontiers in Biosciences. pp 1-62.
Moroz, L.L. and Kohn, A.B. (In press) Do different neurons age differently? Direct genome-wide analysis of aging in single identified cholinergic neurons. Frontiers in Neuroscience. pp. 1-18.
Philippe, H., Brinkmann, H., Copley, R.R., Moroz, L.L., Nakano, H., Poustka, A.J., Wallberg, A., Peterson, K.J. and Telford, M.J. (In press) Acoelomorph flatworms are deuterostomes related to Xenoturbella. Nature 470.
Reyes-Colon, D., Vazquez-Acevedo, N., Rivera, N.M., Jezzini, S.H., Rosenthal, J., Ruiz-Rodriguez, E.A., Baro, D.J., Kohn, A.B., Moroz, L.L. and Sosa, M.A. (2010) Cloning and distribution of a putative octopamine/tyramine receptor in the central nervous system of the freshwater prawn Macrobrachium rosenbergii. Brain Research 1348: 42-54.
Squires, L.N., Rubakhin, S.S., Wadhams, A.A., Talbot, K.N., Nakano, H., Moroz, L.L. and Sweedler, J.V. (2010) Serotonin and its metabolism in basal deuterostomes: insights from Strongylocentrotus purpuratus and Xenoturbella bocki. The Journal of Experimental Biology 213: 2647-2654.
Moroz LL (2009) On the independent origins of complex brains and neurons. Brain Behav Evol 74 pp177-190.
Walters ET, Moroz LL (2009) Molluscan memory of injury: Evolutionary insights into chronic pain and neurological disorders. Brain Behav Evol 74 pp206-218.
Cummins SF, Erpenbeck D, Zou Z, Claudianos C, Moroz LL, Nagle GT, Degnan BM (2009) Candidate chemoreceptor subfamilies differentially expressed in the chemosensory organs of the mollusc Aplysia. BMC Biololgy 7:28. http://www.biomedcentral.com/1741-7007/7/28
Mikhailov KV, Konstantinova AV, Nikitin MA, Troshin PV, Rusin LY, Lyubetsky VA, Panchin YV, Mylnikov AP, Moroz LL, Kumar S, Aleoshin VV (2009) The origin of Metazoa: a transition from temporal to spatial cell differentiation. Bioessays 31: pp 758-768. http://www3.interscience.wiley.com/journal/122406533/abstract?CRETRY=1&SRETRY=0
doi:10.1002/bies.200800214
PMid:19472368
Vazquez-Acevedo N, Reyes-Colon D, Ruiz-Rodriguez EA, Rivera NM, Rosenthal J, Kohn AB, Moroz LL, Sosa MA (2009) Cloning and immunoreactivity of the 5-HT 1Mac and 5-HT 2Mac receptors in the central nervous system of the freshwater prawn Macrobrachium rosenbergii. J Comp Neurol 513: pp. 399-416.
doi:10.1002/cne.21979
PMid:19184976 PMCid:2719784
Lee YS, et al. (2008) Transcriptome analysis and identification of regulators for long-term plasticity in Aplysia kurodai. Proc Natl Acad Sci U S A. Nov 25;105(47):18602-18607
Bishop, C.D., Pires, A., Norby, S.W., Boudko, D., Moroz, L.L., Hadfield, M.G.(2008) Analysis of nitric oxide-cyclic guanosine monophosphate signaling during metamorphosis of the nudibranch Phestilla sibogae Bergh (Gastropoda: Opisthobranchia). Evolution & Development 10(3): 288-299.
doi:10.1111/j.1525-142X.2008.00238.x
Panchin, Y., Moroz, L.L. (2008) Molluscan mobile elements similar to the vertebrate Recombination-Activating Genes. Biochem. Biophys. Res. Commun. 2008 Feb 27; [Epub ahead of print] PMID: 18313399
PMCID: PMC 2719772
Wu., Y., Yang, C.J., Moroz, L.L., Tan, W. (2008) Nucleic acid beacons for long-term real-time intracellular monitoring. Analytical Chemistry Mar 6; [Epub ahead of print]. PMID: 18321137
Hatcher, N.G., Zhang, X., Stuart, J.N., Moroz, L.L., Sweedler, J.V., Gillette, R. (2008) 5-HT and 5-HT-SO(4), but not tryptophan or 5-HIAA levels in single feeding neurons track animal hunger state. Journal of Neurochemistry 104(5):1358-1363.
doi:10.1111/j.1471-4159.2007.05084.x
PMid:18036151
Moroz, L.L., Kohn, A.B. (2007) On the comparative biology of NO synthetic pathways: Parallel evolution of NO mediated signaling. In Nitric Oxide, Advances in Experimental Biology, Volume 1. (Eds. Trimmer, B., Tota, B. & Wang, T.) Elsevier BV, Amsterdam, 1-45.
doi:10.1016/S1872-2423(07)01001-0
Antonov I, Ha T, Antonova I, Moroz L.L., & Hawkins RD. (2007) Role of nitric oxide in classical conditioning of siphon withdrawal in Aplysia. J. of Neuroscience: 27(41):10993-11002.
doi:10.1523/JNEUROSCI.2357-07.2007
PMid:17928440
Hatcher, N.G., Zhang, X., Stuart, J.M., Moroz, L.L., Sweedler, J.V. and Gillette, R. (2007) 5-HT and 5-HT-SO(4), but not tryptophan or 5-HIAA levels in single feeding neurons track animal hunger state. J Neurochem. 2007 Nov 23; [Epub ahead of print]
Moroz, L.L., Edwards, J. R., Puthanveettil, S.V., Kohn, A.B. et al. (2006) Neuronal transcriptome inAplysia: Neuronal Compartments and Circuitry.Cell: 127(7): 1453-1467.
Bourlat, S.J., Juliusdottir, T., Lowe, C.J., Freeman, R., Aronowicz, J., Kirschner, M., Lander, E.S., Thorndyke, M., Nakano, H., Kohn, A.B., Heyland, A., Moroz, L.L., Copley, R.R., Telford, M.J. (2006). Deuterostome Phylogeny Reveals Monophyletic Chordates and the New Phylum Xenoturbellida. Nature, 444, 85-88.
doi:10.1038/nature05241
PMid:17051155
Lovell, P. and Moroz, L.L. (2006). The largest growth cones in the animal kingdom and dynamics of neuronal growth in cell culture of Aplysia. April 15 Integrative and Comparative Biology, 46, 847-870. Heyland, A. Reitzel, A.M., Price, D.A., Moroz, L.L. (2006). Endogenous thyroid hormone synthesis in facultative planktotrophic larvae of the sand dollar Clypeaster rosaceus: Implications for the evolutionary loss of larval feeding. Evolution & Development, 8(6): 568-579.
Heyland, A., Moroz, L.L. (2006). Signaling mechanisms underlying metamorphic transitions in animals. Integrative and Comparative Biology. p. 1-17; doi:10.1093/icb/icl023, in press
Thomas Flatt, Leonid L. Moroz, Marc Tatar, and Andreas Heyland. (2006). A potential role for thyroid hormones in Drosophila melanogaster development and immunity. J. Integrative and Comparative Biology, 1-18; doi:10.1093/icb/icl034, in press
Heyland, A. Reitzel, A.M., Price, D.A., Moroz, L.L. (2006). Endogenous thyroid hormone synthesis in facultative planktotrophic larvae of the sand dollar Clypeaster rosaceus: Implications for the evolutionary loss of larval feeding. Evolution & Development, 8(6): 568-579.
doi:10.1111/j.1525-142X.2006.00128.x
Ha, T.J., Kohn, A.B., Bobkova, Y.V., Moroz, L.L. (2006) Molecular characterization of NMDA-like receptors in Aplysia and Lymnaea: relevance to memory mechanisms. Biological Bulletin 210(3): 255-270.
doi:10.2307/4134562
PMid:16801499
Xu, C., Xu, L., Yu, F., Tan, W., Moroz, L.L. and Li J. (2006) Nonparametric estimation of the number of unique sequences in biological samples. IEEE Transactions on Signal Processing. 54 (10), 3759-3767.
doi:10.1109/TSP.2006.880211
Heyland, .A, Price, D.A., Bodnarova-Buganova, M. and Moroz, L.L. (2006) Thyroid hormone metabolism and peroxidase function in two non-chordate animals. J Exp Zoolog B Mol Dev Evol. (Epub ahead of Print PMID: 16739141. Jezzini, S.H., Reagin, S., Kohn, A.B. and Moroz, L.L. (2006) Molecular characterization and expression of a two-pore domain potassium channel in the CNS of Aplysia californica. Brain Res. 1094(1): 47-56.
Jezzini, S.H., Reagin, S., Kohn, A.B. and Moroz, L.L. (2006) Molecular characterization and expression of a two-pore domain potassium channel in the CNS of Aplysia californica. Brain Res. 1094(1): 47-56.
doi:10.1016/j.brainres.2006.03.122
PMid:16716269
Moroz, L.L. (2006) Localization of putative nitrergic neurons in peripheral chemosensory areas and the central nervous system of Aplysia californica. J Comp Neurol 495(1):10-20.
doi:10.1002/cne.20842
PMid:16432897
Knudsen, B., Kohn, A.B., Nahir, B., McFadden, C.S. and Moroz, L.L. (2006) Complete DNA sequence of the mitochondrial genome of the sea-slug, Aplysia californica: conservation of the gene order in Euthyneura. Mol Phylogenet Evol 38(2):459-469.
doi:10.1016/j.ympev.2005.08.017
PMid:16230032
Hatcher, N.G., Sudlow, L.C., Moroz, L.L. and Gillette, R. (2006) Nitric oxide potentiates cAMP-gated cation current in feeding neurons of Pleurobranchaea californica independent of cAMP and cGMP signaling pathways. J Neurophysiol 95(5):3219-3227.
PMid:16617178
Kohn, A.B., Lea, J.M., Moroz, L.L. and Greenberg, R.M. (2006) Schistosoma mansoni: Use of a fluorescent indicator to detect nitric oxide and related species in living parasites. Exp Parasitol 113(2):130-133.
doi:10.1016/j.exppara.2005.12.013
PMid:16458296
Lovell, P., Jezzini, S.H. and Moroz, L.L. (2006) Electroporation of neurons and growth cones in Aplysia californica. J Neurosci Methods 151(2):114-120.
doi:10.1016/j.jneumeth.2005.06.030
PMid:16174534
Drake, T.J., Jezzini, S., Lovell, P., Moroz, L.L. and Tan, W. (2005) Single cell glutamate analysis in Aplysia sensory neurons. J Neurosci Methods, 144 (1) : 73-77.
doi:10.1016/j.jneumeth.2004.10.011
PMid:15848241
Bodnárová, M., Martásek, P. and Moroz, L.L. (2005) Calcium/calmodulin-dependent nitric oxide synthase activity in the CNS of Aplysia californica: Biochemical characterization and link to cGMP pathways. J. Inorg. Biochemistry, Apr; 99 (4):922-8.
Moroz, L.L., Dahlgren, R.L., Boudko, D., Sweedler, J.V. and Lovell, P. (2005) Direct single cell determination of nitric oxide synthase related metabolites in identified nitrergic neurons. J. Inorg. Biochemistry. 99 (4): 929-39.
doi:10.1016/j.jinorgbio.2005.01.013
PMid:15811510
Tan, L., Li, Y., Moroz, L., Drake, T., Munteanu, A., Yang, C., Martinez, K. and Tan, W. (2005) Molecular beacons for bioanalytical applications., The Analyst 130 (7): 1002-1005.
doi:10.1039/b500308n
PMid:15965520
Jezzini, S.H., Bodnarova, M. and Moroz, L.L. (2005) Two-color in-situ hybridization in the CNS of Aplysia californica. J. Neurosci. Methods. 149 (1): 15-25.
doi:10.1016/j.jneumeth.2005.05.007
PMid:16061289
Heyland, A. and Moroz, L.L. (2005) Cross-kingdom hormonal signaling: an insight from thyroid hormone functions in marine larvae. J. Exp. Biol. 208 (Pt 23): 4355-61.
doi:10.1242/jeb.01877
PMid:16339856
Gruenhagen, J.A., Lovell P., Moroz, L.L. and Yeung, E.S. (2004) Monitoring real-time release of ATP from the molluscan central nervous system. J. Neurosci. Methods 139(2):145-152.
doi:10.1016/j.jneumeth.2004.03.008
PMid:15488226
Ostrovskaya, O., Moroz L. and Krishtal O. (2004) Modulatory action of RFamide-related peptides on acid-sensing ionic channels is pH dependent: the role of arginine. J. Neurochem. 91(1): 252-255.
doi:10.1111/j.1471-4159.2004.02688.x
PMid:15379905
Yudin, Y.K., Tamarova, Z.A., Ostrovskaya, O.I., Moroz, L.L. and Krishtal, O.A. (2004) RFa-related peptides are algogenic: evidence in vitro and in vivo. Eur. J. Neurosci. 20(5):1419-1423.
doi:10.1111/j.1460-9568.2004.03607.x
PMid:15341614
Moroz, L.L., Meech, R.W., Sweedler, J.V. and Mackie, G.O. (2004) Nitric oxide regulates swimming in the jellyfish Aglantha digitale. J. Comparative Neurology: 471(1): 26-36.
doi:10.1002/cne.20023
PMid:14983473
Walters, E.T., Bodnárová, M., Billy, A.J., Dulin, M.F., Diaz-Rios, M., Muller M. and Moroz, L.L. (2004) Somatotopic organization and functional properties of mechanosensory neurons expressing sensorin-A mRNA in Aplysia californica. J. Comparative Neurology: 471(2): 219-240.
doi:10.1002/cne.20042
PMid:14986314
Zhulidov, P. A., Bogdanova, E. A., Altshuler, I.M., Vagner, L.L., Khaspekov, G.L., Kozhemyako, V.B., Matz, M.V., Meleshkevitch, E., Moroz, L.L., Lukyanov, S.A. and Shagin, D.A. (2004) Simple full-length cDNA normalization using kamchatka crab duplex specific nuclease. Nuc. Acid Res. 32 (3): 1-8.
doi:10.1093/nar/gnh031
PMid:14973331 PMCid:373426
Jezzini, S. and Moroz L.L. (2004) Identification and distribution two-pore domain potassium channels from the CNS of Aplysia californica. Brain Res. Molecular Brain Res. 127(1-2): 27-38.
doi:10.1016/j.molbrainres.2004.05.007
PMid:15306118
Boudko, D.Y., Cooper, B.Y., Harvey, W.R. and Moroz, L.L. (2002) High-resolution microanalysis of nitrite and nitrate in neuronal tissues by capillary electrophoresis with conductivity detection. J. Chromatogr. B. 774: 97-104.
doi:10.1016/S1570-0232(02)00219-2
Kim, W.S., Dahlgren, R.L., Moroz, L.L., Sweedler, J.V. (2002) Ascorbic acid assays of individual neurons and neuronal tissues using capillary electrophoresis with laser-induced fluorescence detection. Anal. Chem. 74: 5614-5620.
doi:10.1021/ac025917q
PMid:12433096
Zhang X., Kim W.S., Hatcher N., Potgieter K., Moroz L.L., Gillette R., Sweedler J.V. (2002) Interfering with nitric oxide measurements: 4,5-diaminofluorescein reacts with dehydroascorbic acid and ascorbic acid. J Biol Chem. 277(50): 48472-48478.
doi:10.1074/jbc.M209130200
PMid:12370177
Moroz, L.L. (2001) Gaseous transmission across time and species. Amer. Zool.41: 304-320.
doi:10.1668/0003-1569(2001)041[0304:GTATAS]2.0.CO;2
Vilim, F. S., V. Alexeeva, Moroz, L.L. et al. (2001). "Cloning, expression and processing of the CP2 neuropeptide precursor of Aplysia." Peptides 22(12): 2027-38.
doi:10.1016/S0196-9781(01)00561-7
Boudko D.Y., Moroz L.L., Harvey W.R., Linser P.J. (2001a) Alkalinization by chloride/bicarbonate pathway in larval mosquito midgut. Proc Natl Acad Sci U S A 98:15354-15359.
doi:10.1073/pnas.261253998
PMid:11742083 PMCid:65033
Boudko D.Y., Moroz L.L., Linser P.J., Trimarchi J.R., Smith P.J., Harvey WR (2001b) In situ analysis of pH gradients in mosquito larvae using non-invasive, self-referencing, pH-sensitive microelectrodes. J Exp Biol 204:691-699.
PMid:11171351
Kohn A.B., Moroz L.L., Lea J.M., Greenberg R.M. (2001) Distribution of nitric oxide synthase immunoreactivity in the nervous system and peripheral tissues of Schistosoma mansoni. Parasitology 122 Pt 1:87-92.
doi:10.1017/S0031182000007022
PMid:11197769
Gillette, R., Huang, R., Hatcher, N., Moroz, L.L. (2000). Cost-benefit analysis potential in feeding behavior of a predatory snail by integration of hunger, taste and pain. Proc Natl Acad Sci USA: 97, 3585-3590.
doi:10.1073/pnas.97.7.3585
Moroz, L.L., Norekian, T.P., Pirtle, T.J., Robertson, K.J., Satterlie, R.A. (2000). Distribution of NADPH-diaphorase reactivity and effects of NO-donors on feeding and locomotory circuitry in the pteropod mollusc, Clione limacina. J. Comp. Neurol., 427, 274-284
doi:10.1002/1096-9861(20001113)427:23.0.CO;2-#
Moroz, L.L. (2000). On the origin and early evolution of neuronal NO signaling: A comparative analysis. In: Nitric oxide and free radicals in peripheral neurotransmission. (Kalsner S, ed). New York: Springer-Verlag: 1-34.
Moroz, L. L. (2000) Giant identified NO-releasing neurons and comparative histochemistry of putative nitrergic systems in gastropod molluscs. Microscopy Research and Technique 49: 557-569.
doi:10.1002/1097-0029(20000615)49:63.0.CO;2-S
Moroz L.L., Gillette R., Sweedler J.V. (1999) Single-cell analyses of nitrergic neurons in simpler nervous systems. J Exp Biol 202:333-341.
PMid:9914142
Hurst W.J., Moroz, L.L., Gillette, M.U. and Gillette, R. (1999). Nitric oxide synthase immunolabeling in the molluscan CNS and peripheral tissues. Biochem. Biophys. Res. Com. 262, 545-548.
doi:10.1006/bbrc.1999.1247
PMid:10462511
Moroz, L.L., Norby, S.W., Cruz, L., Sweedler, J.V., Gillette, R., Clarkson, R.B. (1998). Non-enzymatic production of nitric oxide (NO) from NO synthase inhibitors. Biochem. Biophys. Res. Com., 253, 571-576.
doi:10.1006/bbrc.1998.9810
PMid:9918769
Fuller, R., Moroz, L.L., Gillette, R., and Sweedler, J.V. (1998). Serotonin and related molecules in identified neurons: Direct analysis of intracellular concentrations by capillary electrophoresis with fluorescence spectroscopy. Neuron, 20, 173-181.
doi:10.1016/S0896-6273(00)80446-8
Floyd, P., Moroz, L.L., Gillette, R., and Sweedler, J.V. (1998). Capillary electrophoresis analysis of nitric oxide synthase related metabolites in single identified neurons. Anal. Chem., 70, 2243-2247.
doi:10.1021/ac9713013
PMid:9624898
Sudlow, L., J. Jing, Moroz, L.L., and Gillette, R. (1998). Serotonin-containing neurons in the CNS of the opisthobranch molluscs,Pleurobranchaea californica and Tritonia diomedea.J.Comp. Neurol.,395, 466-480.
doi:10.1002/(SICI)1096-9861(19980615)395:43.0.CO;2-#
Moroz, L.L., Sudlow, L.C., Jing, J., Gillette, R. (1997). Serotonin-immuno reactivity in peripheral tissues of the opisthobranch molluscs Pleurobranchaea californica and Tritonia diomedea. J. Comp. Neurol. 382, 176-188.
doi:10.1002/(SICI)1096-9861(19970602)382:23.0.CO;2-0
Cruz, L., Moroz, L.L., Gillette, R., Sweedler, J.V. (1997). Nitrite and nitrate levels in individual molluscan neurons: Single cell capillary electrophoresis analysis. J. Neurochem., 69, 110-115.
doi:10.1046/j.1471-4159.1997.69010110.x
Moroz, L.L. and Gillette, R. (1996). NADPH-diaphorase localization in the CNS and peripheral tissues of the predatory sea-slug, Pleurobranchaea californica. J. Comp. Neurol., 367, 607-622.
doi:10.1002/(SICI)1096-9861(19960415)367:43.0.CO;2-E
Moroz, L.L., Chen, D., Gillette. M.U. and R. Gillette (1996). Nitric oxide synthase activity in the molluscan CNS. J. Neurochem. 66, N2, 873-876.
doi:10.1046/j.1471-4159.1996.66020873.x
Leake, L.D. and Moroz L.L. (1996). Putative nitric oxide synthase (NOS)-containing cells in the central ner-vous system of the leech, Hirudo medicinalis: NADPH-diaphorase histochemistry. Brain Res.723,115-124.
doi:10.1016/0006-8993(96)00220-X
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