Chin Ho Chen

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This mini review covers the drug discovery aspect of both proteasome activators and inhibitors. The proteasome is involved in many essential cellular functions, such as regulation of cell cycle, cell differentiation, signal transduction pathways, antigen processing for appropriate immune responses, stress signaling, inflammatory responses, and apoptosis.(More)
The compound 3-O-(3',3'-dimethylsuccinyl)-betulinic acid (DSB) potently and specifically inhibits human immunodeficiency virus type 1 (HIV-1) replication by delaying the cleavage of the CA-SP1 junction in Gag, leading to impaired maturation of the viral core. In this study, we investigated HIV-1 resistance to DSB by analyzing HIV-1 mutants encoding a(More)
Pentacyclic triterpenes have been found in many plants and may be isolated from any part of the plant. Triterpene derivatives were shown to have biological activities including anti-HIV-1 and anti-cancer activities. The modes of action of the anti-HIV-1 triterpenes have been reported to be associated with the virus entry, reverse transcription, virus(More)
Despite the effectiveness of currently available human immunodeficiency virus type 1 (HIV-1) therapies, a continuing need exists for new drugs to treat HIV-1 infection. We investigated the mechanism by which 3-O-[3',3'-dimethylsuccinyl]-betulinic acid (DSB) inhibits HIV-1 replication. DSB functions at a late stage of the virus life cycle but does not(More)
The small molecule 3-O-(3',3'-dimethylsuccinyl)-betulinic acid (DSB) potently inhibits human immunodeficiency virus, type 1 (HIV-1) replication by interfering with proteolytic cleavage of the viral Gag protein at a specific site. Here we have demonstrated that the antiviral mechanism involves the association of DSB with Gag at a 1:1 stoichiometry within(More)
Betulinic acid (BA) derivatives are low molecular weight organic compounds synthesized from a plant-derived natural product. Several BA derivatives are potent and highly selective inhibitors of HIV-1. Depending on the specific side-chain modification, these compounds function by inhibiting HIV fusion or, as recently demonstrated, by interfering with a(More)
Articles you may be interested in Study of electric characteristics and diffusion effects of 2-methyl-9,10-di(2-naphthyl)anthracene doped with cesium fluoride by admittance spectroscopy Appl. Study of efficient and stable organic light-emitting diodes with 2-methyl-9,10-di(2-naphthyl)anthracene as hole-transport material by admittance spectroscopy Appl.(More)
We have synthesized a new green fluorescent dopant C-545P having incorporated five strategically placed "methyl" steric spacers on the julolidyl ring system. C-545P has good thermal properties and photostability, and when fabricated as a dopant in an Alq(3)-hosted OLED device, it shows notable improvement in luminance efficiency and is more resistant to(More)
BACKGROUND Despite the effectiveness of currently available antiretroviral therapies in the treatment of HIV-1 infection, a continuing need exists for novel compounds that can be used in combination with existing drugs to slow the emergence of drug-resistant viruses. We previously reported that the small molecule 3-O-{3',3'-dimethylsuccinyl}-betulinic acid(More)