Transcriptional profiling in human HaCaT keratinocytes in response to kaempferol and identification of potential transcription factors for regulating differential gene expression
Experimental & Molecular Medicine
;
: 208-219, 2008.
Article
in English
| WPRIM
| ID: wpr-52234
ABSTRACT
Kaempferol is the major flavonol in green tea and exhibits many biomedically useful properties such as antioxidative, cytoprotective and anti-apoptotic activities. To elucidate its effects on the skin, we investigated the transcriptional profiles of kaempferol-treated HaCaT cells using cDNA microarray analysis and identified 147 transcripts that exhibited significant changes in expression. Of these, 18 were up-regulated and 129 were down-regulated. These transcripts were then classified into 12 categories according to their functional roles cell adhesion/cytoskeleton, cell cycle, redox homeostasis, immune/defense responses, metabolism, protein biosynthesis/modification, intracellular transport, RNA processing, DNA modification/ replication, regulation of transcription, signal transduction and transport. We then analyzed the promoter sequences of differentially-regulated genes and identified over-represented regulatory sites and candidate transcription factors (TFs) for gene regulation by kaempferol. These included c-REL, SAP-1, Ahr-ARNT, Nrf-2, Elk-1, SPI-B, NF-kappaB and p65. In addition, we validated the microarray results and promoter analyses using conventional methods such as real-time PCR and ELISA-based transcription factor assay. Our microarray analysis has provided useful information for determining the genetic regulatory network affected by kaempferol, and this approach will be useful for elucidating gene-phytochemical interactions.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Transcription Factors
/
Transcription, Genetic
/
Enzyme-Linked Immunosorbent Assay
/
Base Sequence
/
Keratinocytes
/
Cell Line
/
Gene Expression Regulation
/
Promoter Regions, Genetic
/
DNA Primers
/
Reverse Transcriptase Polymerase Chain Reaction
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Humans
Language:
English
Journal:
Experimental & Molecular Medicine
Year:
2008
Type:
Article
Similar
MEDLINE
...
LILACS
LIS