Abstract
Fibroblast growth factor 21 (FGF21) potentially regulates glucose and lipid metabolism in energy homeostasis. We investigated dynamic changes in goat adipocytes treated with 75 nM FGF21 for 24, 36 and 48 h. Compared to controls, FGF21-treated adipocytes displayed smaller lipid droplets and altered levels of the mRNA transcripts encoding several lipolysis genes. The genes with elevated mRNA levels included: ATGL, HSL, CPT-1, and UCP1, and this was observed mainly at 24 and 36 h (P < 0.05). Some gene expression was attenuated including lipogenesis genes, such as SREBP1, PPARγ, C/EBPα, and ACC. This attenuation was observed mainly at 24 h (P < 0.05). Among the genes that were significantly induced or inhibited, ATGL, PGC1α, and C/EBPα were observed a significant effect at 48 h (P < 0.05). In addition, FGF21 treatment greatly increased number of mitochondria and the expression of genes implicated in mitochondrial biogenesis, such as PGC1α, NRF1, and TFAM. These results suggest that FGF21 treatment induced lipolysis more effectively than it suppressed lipogenesis in goat adipocytes, and that mitochondrial biogenesis plays an important role in these cells.
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Abbreviations
- FGF21:
-
Fibroblast growth factor
- ATGL:
-
Adipose triglyceride lipase
- HSL:
-
Hormone sensitive lipase
- CPT-1:
-
Carnitine palmitoyltransferase 1
- ACC:
-
Acetyl-coa carboxylase
- FAS:
-
Fatty acid synthase
- SREBP1:
-
Sterol regulatory element binding protein 1
- C/EBPα:
-
CCAAT/enhancer binding protein
- PPARγ:
-
Peroxisome proliferator-activated receptor γ
- PGC1α:
-
Peroxisome proliferator activated receptor-γ co-activator 1-α
- NRF1:
-
Nuclear respiratory factors 1
- TFAM:
-
Mitochondria transcription factor A
- UCP1:
-
Uncoupling protein 1
- GCG:
-
Glucagon gene
- COX2:
-
Cytochrome c oxidase 2
- HSP-90:
-
Heat shock protein 90
- ALAS:
-
Aminolevulinate synthase
- HMBS:
-
Hydroxyl methyl bilane synthase
- FIS1:
-
Fission protein 1
- OPA1:
-
Optic atrophy 1
- Mfn1:
-
Mitochondria fusion protein 1
- Mfn2:
-
Mitochondria fusion protein 2
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This work was supported by Sichuan province science and technology support program (2014NZ0077, 2015NZ0112).
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This work was approved by Institutional Animal Care and Use Ethics Committee of Sichuan Agriculture University and carried out in accordance with the “Guidelines for Experimental Animals” of the Ministry of Science and Technology (Beijing, PR China).
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Zhang, Y., Li, L., Wang, Q. et al. Fibroblast growth factor 21 induces lipolysis more efficiently than it suppresses lipogenesis in goat adipocytes. Cytotechnology 70, 1423–1433 (2018). https://doi.org/10.1007/s10616-018-0237-1
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DOI: https://doi.org/10.1007/s10616-018-0237-1