Chloride intracellular channel 5 modulates adipocyte accumulation in skeletal muscle by inhibiting preadipocyte differentiation.
Intramuscular fat, the total lipid deposited within skeletal muscle, has been regarded as a potential factor responsible for meat quality in animal production and insulin resistance in humans. The objective of present study was to identify candidate genes which control intramuscular fat accumulation through using animal models. PIC pigs (lean-type) and Rongchang pigs (obese-type) were used. By scanning the mRNA samples of longissimus dorsi muscle with Affymetrix Gene-Chip microarray technology, sus scrofa chloride intracellular channel 5 (CLIC5) was isolated, and its mRNA abundance and protein expression level were reversely related with the intramuscular fat content of pigs. Furthermore, over-expression of CLIC5 dramatically increased the proliferation of 3T3-L1 preadipocytes, while inhibited adipocytic differentiation accompanied by the down-regulation of c/EBPalpha, LPL, and PPARgamma protein. Our results suggest that CLIC5 might be a crucial regulator of adipose accumulation in skeletal muscle of pigs.
Li
Feng-Na
FN
State Key Laboratory of Animal Nutrition, College of Animal Science, China Agricultural University, Beijing 100193, PR China.
Yin
Jing-Dong
JD
Ni
Jian-Jun
JJ
Liu
Ling
L
Zhang
Hai-Yan
HY
Du
Min
M
D041721:3T3-L1 Cells; D017667:Adipocytes / Q000166:cytology*; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015153:Blotting, Western; D002454:Cell Differentiation / Q000502:physiology*; D002455:Cell Division / Q000502:physiology; D018118:Chloride Channels / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D018076:DNA, Complementary; D005434:Flow Cytometry; D020869:Gene Expression Profiling; D051379:Mice; D008840:Microfilament Proteins / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D023421:Models, Animal; D008969:Molecular Sequence Data; D018482:Muscle, Skeletal / Q000166:cytology*; D020411:Oligonucleotide Array Sequence Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D013552:Swine
C411466:CLIC5 protein, human; D018118:Chloride Channels; D018076:DNA, Complementary; D008840:Microfilament Proteins