A study involving antioxidizability and cytotoxicity of two kinds of phenol from Ajania Salicifolia and their mechanisms of apoptosis / 中国应用生理学杂志
Chinese Journal of Applied Physiology
; (6): 422-426, 2015.
Article
in Zh
| WPRIM
| ID: wpr-254998
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To extract two kinds of phenols 4-hydroxy-3, 5-dimethoxy-4-(2-oxopropyl) cyclohexa-2, 5-dien-l-one and 6-methoxy-5,7-dihydroxy coumarin (named as I and H compounds respectively) from Ajania salicifolia and to investigate their antioxidation and cytotoxicity to tumors and explore their pro-apoptosis mechanism.</p><p><b>METHODS</b>The antioxidant activities of two compounds were assessed by ABTS and DPPH radical-scavenging assays. Two compounds were evaluated for their cytotoxicity against human chronic myelogenous leukemia (K562) cells using the MIT assay. The expression of NF-kappaB P65 mRNA in K562 apoptotic cells was measured by reverse transcription-polymerase chain reaction (RT-PCR), real-time quantitative PCR. In addition, protein expression levels of the NF-ICB P65, p-Akt, Fas, P-catenina and E-cadherin were also measured by Western blot.</p><p><b>RESULTS</b>(1) We found that compound I displayed significant inoxidizability, while compound II had no obvious antioxidizability. (2) In cytotoxicity experiments, compound I didn't display cytotoxicity while compound H displayed obvious cytotoxicity. (3) Compared with the blank group, the expression of NF-kappaB P65 mRNA in K562 cell after treatment with compound II was obviously up-regulated. (4) Compared with the blank group, the expression levels of NF-kappaB P65, Fas, beta-catenina and E-cadherin were significantly increased in compound II treated groups and it appeared obvious dose-effect relationship between the expression of protein and drug concentration.</p><p><b>CONCLUSION</b>Two phenols have obvious antioxidizability and cytotoxicity respectively. On the one hand, the tumor-suppressing mechanism of compound II maybe act by up-regulation the expression of NF-kappaB P65 and Fas protein; thereby, affecting the classical Fas apoptosis signaling pathways. On the other hand, it can also up-regulate the expression of protein beta-catenin and E-cadherin, which participate in the adhesion between cells, and accordingly, playing an important role in preventing the proliferation and metastasis of cancer cells.</p>
Full text:
1
Index:
WPRIM
Main subject:
Phenols
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Signal Transduction
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Cadherins
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Up-Regulation
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Chemistry
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Apoptosis
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Fas Receptor
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Asteraceae
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K562 Cells
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Oncogene Protein v-akt
Limits:
Humans
Language:
Zh
Journal:
Chinese Journal of Applied Physiology
Year:
2015
Type:
Article