Bio

Honors & Awards


  • T32 Postdoctoral training in Immunology, Stanford Immunology Stanford University School of Medicine (2014)

Professional Education


  • Doctor of Philosophy, University of California Davis, Immunology (2014)
  • Master of Science, California State Univ, Los Angeles (2009)
  • Bachelor of Science, California State Univ, Los Angeles (2007)

Stanford Advisors


  • May Han, Postdoctoral Faculty Sponsor

Research & Scholarship

Current Research and Scholarly Interests


I am interested in investigating the effects of S1P-mediated signaling in immune-mediated CNS inflammation, microglial activation and oligodendrocyte differentiation.

Publications

Journal Articles


  • Conditional Ablation of Astroglial CCL2 Suppresses CNS Accumulation of M1 Macrophages and Preserves Axons in Mice with MOG Peptide EAE. journal of neuroscience Moreno, M., Bannerman, P., Ma, J., Guo, F., Miers, L., Soulika, A. M., Pleasure, D. 2014; 34 (24): 8175-8185

    Abstract

    Current multiple sclerosis (MS) therapies only partially prevent chronically worsening neurological deficits, which are largely attributable to progressive loss of CNS axons. Prior studies of experimental autoimmune encephalomyelitis (EAE) induced in C57BL/6 mice by immunization with myelin oligodendrocyte glycoprotein peptide 35-55 (MOG peptide), a model of MS, documented continued axon loss for months after acute CNS inflammatory infiltrates had subsided, and massive astroglial induction of CCL2 (MCP-1), a chemokine for CCR2(+) monocytes. We now report that conditional deletion of astroglial CCL2 significantly decreases CNS accumulation of classically activated (M1) monocyte-derived macrophages and microglial expression of M1 markers during the initial CNS inflammatory phase of MOG peptide EAE, reduces the acute and long-term severity of clinical deficits and slows the progression of spinal cord axon loss. In addition, lack of astroglial-derived CCL2 results in increased accumulation of Th17 cells within the CNS in these mice, but also in greater confinement of CD4(+) lymphocytes to CNS perivascular spaces. These findings suggest that therapies designed to inhibit astroglial CCL2-driven trafficking of monocyte-derived macrophages to the CNS during acute MS exacerbations have the potential to significantly reduce CNS axon loss and slow progression of neurological deficits.

    View details for DOI 10.1523/JNEUROSCI.1137-14.2014

    View details for PubMedID 24920622

  • Neuronopathy in the Motor Neocortex in a Chronic Model of Multiple Sclerosis JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY Burns, T., Miers, L., Xu, J., Man, A., Moreno, M., Pleasure, D., Bannerman, P. 2014; 73 (4): 335-344

    Abstract

    We provide evidence of cortical neuronopathy in myelin oligodendrocyte glycoprotein peptide-induced experimental autoimmune encephalomyelitis, an established model of chronic multiple sclerosis. To investigate phenotypic perturbations in neurons in this model, we used apoptotic markers and immunohistochemistry with antibodies to NeuN and other surrogate markers known to be expressed by adult pyramidal Layer V somas, including annexin V, encephalopsin, and Emx1. We found no consistent evidence of chronic loss of Layer V neurons but detected both reversible and chronic decreases in the expression of these markers in conjunction with evidence of cortical demyelination and presynaptic loss. These phenotypic perturbations were present in, but not restricted to, the neocortical Layer V. We also investigated inflammatory responses in the cortex and subcortical white matter of the corpus callosum and spinal dorsal funiculus and found that those in the cortex and corpus callosum were delayed compared with those in the spinal cord. Inflammatory infiltrates initially included T cells, neutrophils, and Iba1-positive microglia/macrophages in the corpus callosum, whereas only Iba1-positive cells were present in the cortex. These data indicate that we have identified a new temporal pattern of subtle phenotypic perturbations in neocortical neurons in this chronic multiple sclerosis model.

    View details for DOI 10.1097/NEN.0000000000000058

    View details for Web of Science ID 000333471100006

    View details for PubMedID 24607968

  • Origins and significance of astrogliosis in the multiple sclerosis model, MOG peptide EAE. Journal of the neurological sciences Moreno, M., Guo, F., Mills Ko, E., Bannerman, P., Soulika, A., Pleasure, D. 2013; 333 (1-2): 55-59

    Abstract

    Astroglia, the most abundant cells in the human CNS, and even more prominent in multiple sclerosis patients, participate in CNS innate and adaptive immunity, and have been hypothesized to play an important role in multiple sclerosis progression. Experimental autoimmune encephalomyelitis elicited in mice by immunization with myelin oligodendrocyte glycoprotein peptide 35-55 provides a means by which to explore the genesis and disease significance of astrogliosis during a chronic immune-mediated CNS inflammatory/demyelinative disorder that, in its' pathological features, strongly resembles multiple sclerosis.

    View details for DOI 10.1016/j.jns.2012.12.014

    View details for PubMedID 23294494

  • Endocannabinoid Signaling Alters Internal Programming of Neuronal Fate Specification JOURNAL OF NEUROSCIENCE Sequerra, E. B., Cates, S., Moreno, M., Lang, J., Orosco, L. A., Spencer, K. 2013; 33 (13): 5437-5438
  • Disruption of NMDA Receptors in Oligodendroglial Lineage Cells Does Not Alter Their Susceptibility to Experimental Autoimmune Encephalomyelitis or Their Normal Development JOURNAL OF NEUROSCIENCE Guo, F., Maeda, Y., Ko, E. M., Delgado, M., Horiuchi, M., Soulika, A., Miers, L., Burns, T., Itoh, T., Shen, H., Lee, E., Sohn, J., Pleasure, D. 2012; 32 (2): 639-645

    Abstract

    Pharmacological studies have suggested that oligodendroglial NMDA glutamate receptors (NMDARs) mediate white matter injury in a variety of CNS diseases, including multiple sclerosis (MS). We tested this hypothesis in experimental autoimmune encephalomyelitis (EAE), a model of human MS, by timed conditional disruption of oligodendroglial NR1, an essential subunit of functional NMDARs, using an inducible proteolipid protein (Plp) promoter-driven Cre-loxP recombination system. We found that selective ablation of oligodendroglial NR1 did not alter the clinical severity of EAE elicited in C57BL/6 mice by immunization with myelin oligodendrocyte glycoprotein peptide 35-55 (MOG-peptide), nor were there significant differences between the oligodendroglial NR1 KO and non-KO mice in numbers of axons lost in spinal cord dorsal funiculi or severity of spinal cord demyelination. Similarly, constitutive deletion of NR3A, a modulatory subunit of oligodendroglial NMDARs, did not alter the course of MOG-peptide EAE. Furthermore, conditional and constitutive ablation of NR1 in neonatal oligodendrocyte progenitor cells did not interrupt their normal maturation and differentiation. Collectively, our data suggest that oligodendroglial lineage NMDARs are neither required for timely postnatal development of the oligodendroglial lineage, nor significant participants in the pathophysiology of MOG-peptide EAE.

    View details for DOI 10.1523/JNEUROSCI.4073-11.2012

    View details for Web of Science ID 000299121800025

    View details for PubMedID 22238099

  • Macroglial Plasticity and the Origins of Reactive Astroglia in Experimental Autoimmune Encephalomyelitis JOURNAL OF NEUROSCIENCE Guo, F., Maeda, Y., Ma, J., Delgado, M., Sohn, J., Miers, L., Ko, E. M., Bannerman, P., Xu, J., Wang, Y., Zhou, C., Takebayashi, H., Pleasure, D. 2011; 31 (33): 11914-11928

    Abstract

    Accumulations of hypertrophic, intensely glial fibrillary acidic protein-positive (GFAP(+)) astroglia, which also express immunoreactive nestin and vimentin, are prominent features of multiple sclerosis lesions. The issues of the cellular origin of hypertrophic GFAP(+)/vimentin(+)/nestin(+) "reactive" astroglia and also the plasticities and lineage relationships among three macroglial progenitor populations-oligodendrocyte progenitor cells (OPCs), astrocytes and ependymal cells-during multiple sclerosis and other CNS diseases remain controversial. We used genetic fate-mappings with a battery of inducible Cre drivers (Olig2-Cre-ER(T2), GFAP-Cre-ER(T2), FoxJ1-Cre-ER(T2) and Nestin-Cre-ER(T2)) to explore these issues in adult mice with myelin oligodendrocyte glycoprotein peptide-induced experimental autoimmune encephalomyelitis (EAE). The proliferative rate of spinal cord OPCs rose fivefold above control levels during EAE, and numbers of oligodendroglia increased as well, but astrogenesis from OPCs was rare. Spinal cord ependymal cells, previously reported to be multipotent, did not augment their low proliferative rate, nor give rise to astroglia or OPCs. Instead, the hypertrophic, vimentin(+)/nestin(+), reactive astroglia that accumulated in spinal cord in this multiple sclerosis model were derived by proliferation and phenotypic transformation of fibrous astroglia in white matter, and solely by phenotypic transformation of protoplasmic astroglia in gray matter. This comprehensive analysis of macroglial plasticity in EAE helps to clarify the origins of astrogliosis in CNS inflammatory demyelinative disorders.

    View details for DOI 10.1523/JNEUROSCI.1759-11.2011

    View details for Web of Science ID 000293950300019

    View details for PubMedID 21849552

Footer Links:

Stanford Medicine Resources: