Myeng Chan Hong

Publications (2)5.38 Total impact

• Source

  Available from: Kyo Chul Lee

  Article: Synthesis and evaluation of stilbene derivatives as a potential imaging agent of amyloid plaques.

  Myeng Chan Hong, Yun Kyung Kim, Jae Yong Choi, Si Qiang Yang, Hakjune Rhee, Young Hoon Ryu, Tae Hyun Choi, Gi Jeong Cheon, Gwang Il An, Hye Yun Kim, Youngsoo Kim, Dong Jin Kim, Jun-Seok Lee, Young-Tae Chang, Kyo Chul Lee
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  ABSTRACT: Fluorescence probes that can detect Aβ (β-amyloid peptide) plaque are important tools for diagnosis of Alzheimer's disease (AD), and 4-N-methylamino-4'-hydroxystilbene (SB-13) is one of the promising candidate molecules. We report here the synthesis of SB-13 derivatives that consist of various electron donating/withdrawing moieties and distinct size of N-substituents. The synthesized compounds were screened for detection of Aβ40 fibrils in vitro. Four compounds exhibited more than sixfold intensity increase, and they were further analyzed for detail bindings and Aβ plaque imaging. Among these molecules, compound 42 meets two critical requirements for imaging agent; high fluorescence responsiveness and strong binding affinity. This compound showed more than 25-fold increase with the dissociation constant of 1.13±0.37μM. In AD mouse brain tissue, 42 selectively stained Aβ plaque, more specifically peripheral regions of Aβ plaque. This finding demonstrated its potential use as brain-imaging agents for AD studies.
  Bioorganic & medicinal chemistry 11/2010; 18(22):7724-30. · 2.82 Impact Factor
• Article: Synthesis of constrained ceramide analogs and their potent antileukemic activities.

  Hyun-Joon Ha, Myeng Chan Hong, Seung Whan Ko, Yong Woo Kim, Won Koo Lee, Jungchan Park
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  ABSTRACT: Constrained ceramide analogs were designed and synthesized by binding terminal alcohol and amine of ceramide with additional carbonyl functional group as 3-acetyl (3), 3-propionyl (4), 3-benzoyl (5), and 3-hexadecanoyl-4-(1-hydroxyhexadec-2-enyl)-oxazolidin-2-ones (6). Compounds 4 and 5 showed potent antileukemic activities against human leukemia HL-60 cells with good correlation between cell death and DNA fragmentation.
  Bioorganic & Medicinal Chemistry Letters 05/2006; 16(7):1880-3. · 2.55 Impact Factor