Adipose differentiation-related protein is an ubiquitously expressed lipid storage droplet-associated protein
| Autor: | E J Blanchette-Mackie, Nathan E. Wolins, G Serrero, Dawn L. Brasaemle, Constantine Londos, T. Barber |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
congenital
hereditary and neonatal diseases and abnormalities endocrine system biology Chemistry Perilipin 2 Chinese hamster ovary cell Adipose tissue QD415-436 Cell Biology Biochemistry eye diseases Cell biology chemistry.chemical_compound Endocrinology Perilipin-1 Lipid droplet Adipocyte biology.protein Perilipin Cell fractionation |
| Zdroj: | Journal of Lipid Research, Vol 38, Iss 11, Pp 2249-2263 (1997) |
| ISSN: | 0022-2275 |
| Popis: | The adipose differentiation-related protein (ADRP) was first characterized as a mRNA induced early during adipocyte differentiation (Jiang, H. P., and G. Serrero. 1992. Proc. Natl. Acad. Sci. USA. 89:7856-7860). The present study demonstrates that ADRP mRNA is expressed in a variety of tissues and cultured cell lines. Immunocytochemical examination revealed that ADRP localizes to neutral lipid storage droplets in cultured murine 3T3-L1 adipocytes, murine MA-10 Leydig cells, Chinese hamster ovary (CHO) fibroblasts, and human HepG2 hepatoma cells; the association of ADRP with lipid droplets was confirmed by subcellular fractionation of MA-10 Leydig cells. In addition to ADRP, steroidogenic cells and adipocytes express the perilipins, a family of lipid droplet-associated proteins that share a highly related sequence domain with ADRP. ADRP and perilipins co-localize on lipid droplets in MA-10 Leydig cells. While ADRP was found on small lipid droplets in 3T3-L1 preadipocytes and early differentiated adipocytes, it was absent in maturing adipocytes. In contrast, perilipins were absent early during differentiation, but were found on small and large lipid droplets at later stages. The transition in surface protein composition of adipocyte lipid droplets from ADRP to perilipins occurred 3 days after the initiation of differentiation when cells displayed co-localizatioin of both proteins on the same lipid droplets. The specific localization of adipose differentiation-related protein to lipid droplets in a wide variety of cells suggests that ADRP plays a role in management of neutral lipid stores. |
| Databáze: | OpenAIRE |
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