Expression of porcine adipocyte transcripts during differentiation in vitro and in vivo.
Transcript concentrations for the transcription factors, CCAAT enhancer binding protein beta and alpha (C/EBPbeta and C/EBPalpha), plus the adipocyte-characteristic proteins, fatty acid synthase (FAS), glucose transporter 4 (Glut 4), hormone-sensitive lipase (HSL), insulin receptor (InsR), lipoprotein lipase (LPL), and leptin were measured during differentiation of porcine stromal-vascular (S/V) cells in vitro. These same transcripts, excluding FAS and InsR, were measured in porcine adipose tissue from birth to 7 weeks of age. In S/V cells, C/EBPbeta and InsR were continuously elevated. At day 0, C/EBPalpha was approximately 20% of the day 9 value. The LPL increased gradually from day 0 to 9, whereas most other transcripts had a lag period of several days. In tissue, C/EBPbeta was substantial at birth and increased gradually. The C/EBPalpha was relatively low at birth and increased at day 17. The LPL and leptin increased continuously. The Glut 4 was low at birth and increased at day 28. The HSL was relatively low at birth, increased at day 10, and plateaued at day 28. Transcripts in porcine S/V cells develop somewhat differently from adipocyte differentiation models established in clonal cells, but the porcine cells represent a model that should be more applicable to pigs.
McNeel
R L
RL
USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030-2600, USA.
Ding
S T
ST
Smith
E O
EO
Mersmann
H J
HJ
D017667:Adipocytes / Q000166:cytology* / Q000502:physiology*; D000818:Animals; D022763:CCAAT-Enhancer-Binding Protein-alpha / Q000502:physiology; D022782:CCAAT-Enhancer-Binding Protein-beta / Q000502:physiology; D002454:Cell Differentiation / Q000502:physiology; D002478:Cells, Cultured; D064429:Fatty Acid Synthases / Q000502:physiology; D051275:Glucose Transporter Type 4; D020738:Leptin / Q000502:physiology; D008071:Lipoprotein Lipase / Q000502:physiology; D009004:Monosaccharide Transport Proteins / Q000502:physiology; D009124:Muscle Proteins; D011972:Receptor, Insulin / Q000502:physiology; D002787:Sterol Esterase / Q000502:physiology; D013552:Swine; D014157:Transcription Factors / Q000502:physiology; D014158:Transcription, Genetic
D022763:CCAAT-Enhancer-Binding Protein-alpha; D022782:CCAAT-Enhancer-Binding Protein-beta; D051275:Glucose Transporter Type 4; D020738:Leptin; D009004:Monosaccharide Transport Proteins; D009124:Muscle Proteins; D014157:Transcription Factors; D064429:Fatty Acid Synthases; D011972:Receptor, Insulin; D002787:Sterol Esterase; D008071:Lipoprotein Lipase