Hanseul Oh

Publications (2)2.46 Total impact

• Article: Immunohistochemical studies on disabled-2 protein in the spinal cords of rats with experimental autoimmune encephalomyelitis.

  Meejung Ahn, Hanseul Oh, Wonho Lee, Heechul Kim, Changjong Moon, Taekyun Shin
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  ABSTRACT: Disabled-2 (Dab-2), an adaptor protein of transforming growth factor beta (TGF-β) signaling, was studied in the spinal cords of rats with experimental autoimmune encephalomyelitis (EAE) to evaluate the possible involvement of Dab-2 in the pathogenesis of EAE using Western blot and immunohistochemical analyses. Western blot analysis showed that two isoforms (p96 kDa and p67 kDa) of Dab-2 were detected in the spinal cords of rats used as controls. Both isoforms of Dab-2 were significantly elevated in the EAE spinal cord at the peak stage of EAE (P<0.05) and declined at the recovery stage. However, only the p96 kDa isoform was markedly phosphorylated in the EAE spinal cord. Immunohistochemistry showed that Dab-2 and p-Dab-2 were detected in some vascular endothelial cells, glial cells, and some neurons in the rat spinal cords of normal and immunized CFA-alone controls. In EAE lesions, Dab-2 and p-Dab-2 were immunodetected in some inflammatory cells (mainly in ED1-positive macrophages and R73-positive T cells), while the enhanced immunoreactivity of Dab-2 in spinal cord cells suggested constitutive expression. Additionally, TGF-β1 immunoreactivity showed a similar expression pattern of Dab-2 in EAE lesions. These findings suggest that Dab-2 is transiently upregulated and phosphorylated (particularly the p96 kDa isoform) in EAE, a CNS autoimmune disease, and may be involved in TGF-β signaling.
  Brain research 08/2011; 1416:51-60. · 2.46 Impact Factor
• Source

  Available from: PubMed Central

  Article: Immunohistochemical localization of cyclic AMP-responsive element binding protein (CREB)-binding protein in the pig retina during postnatal development.

  Hanseul Oh, Heechul Kim, Meejung Ahn, Chanwoo Jeong, Jinwoo Jeong, Changjong Moon, Taekyun Shin
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  ABSTRACT: This study evaluated the cellular localization of cyclic AMP-responsive element binding protein-binding protein (CBP) expression in pig retinas during postnatal development. Immunohistochemistry and Western blot analysis were performed on retinal tissue from 2-day-old, 5-week-old, and 6-month-old pigs. Western blot analysis detected the expression of CBP in the retinas of 2-day-old piglets and showed that it was significantly decreased in the retinas of 5-week-old and 6-month-old pigs. Immunohistochemically, CBP was intensely immunostained in protein kinase C alpha (PKCα)-positive-bipolar cells, glutamine synthetase-positive Müller cells, and in ganglion cells in 2-day-old piglets. CBP was detected weakly in the inner plexiform, outer nuclear, and rod and cone layers. CBP immunoreactivity in the ganglion cell layer was decreased in the retinas of 5-week-old and 6-month-old pigs, while clear CBP expression detected in the neurite of PKCα-positive bipolar cells in the inner nuclear layer. In addition, CBP immunoreactivity in Müller cells and glial fibrillary acidic protein-positive glial processes was particularly noteworthy in pig retinas, but not in rat retinas. The results indicate that CBP is expressed differentially in the retinal neurons and glial cells according to growth and animal species, and may play an important role in homeostasis in Müller cells, neurite extention in bipolar cells, and signal transduction in photoreceptor cells in the porcine retina.
  Anatomy & cell biology 06/2011; 44(2):143-50.