Linyou Cheng

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A moderately halophilic actinomycetes strain, designated as WH26, was isolated from Weihai Solar Saltern in China. The identification of the strain WH26 was performed by its morphological characteristics, physiological and biochemical tests as well as phylogenetic analysis based on 16S rRNA sequence comparison. The results showed that the nucleotide(More)
Isolation of Bacillus thuringiensis (Bt) strain or its cry gene encoding insecticidal crystal protein (ICP) with specific toxicity is of great importance to biological control of insect pests. In this study, by screening 66 strains of Bt isolated from soil samples collected in Shandong Province, China, a new cry8-type gene from Bt strain B-JJX was(More)
Cloves (Syzygium aromaticum) have been used as a traditional Chinese medicinal herb for thousands of years. Cloves possess antiseptic, antibacterial, antifungal, and antiviral properties, but their potential anticancer activity remains unknown. In this study, we investigated the in vitro and in vivo antitumor effects and biological mechanisms of ethyl(More)
BACKGROUND Sessile marine animals such as sponges, ascidians, and bryozoans are a rich source of bioactive natural products, many of which exhibit potent anticancer activity. MATERIALS AND METHODS We extracted and purified a polypeptide with potent antitumor activity from Ciona savignyi by acetone fractionation, ultrafiltration, ion exchange(More)
A novel polypeptide (Mere15) was purified from Meretrix meretrix Linnaeus by ammonium sulfate fractionation, ion exchange, gel filtration and reversed phase chromatography. Mere15 exhibited selective cytotoxicity to several human cancer cells. In vivo study showed that Mere15 significantly suppressed the growth of human lung adenocarcinoma A549 xenograft in(More)
Mere15 is a novel polypeptide from Meretrix meretrix Linnaeus with cytotoxicity in solid cancer cells. In this study, we investigated its activity on human K562 chronic myelogenous leukemia cells. Mere15 inhibited the growth of K562 cells with IC₅₀ values of 38.2 μg/mL. Mere15 also caused concentration dependent induction of apoptosis, with overproduction(More)
In the present studies, a novel compound with potent anti-tumor activity from Ciona intestinalis L. was purified by acetone fractionation, ultrafiltration, gel chromatography and High Performance Liquid Chromatography. The molecular weight of the highly purified compound, designated CI431, was 431Da as determined by HPLC-MS analysis. CI431 exhibited(More)
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