Abstract:
BACKGROUND:Insulin has several biological functions besides glycaemic control. We investigated and compared the effects of six different commercial insulins on adipocyte cell differentiation, the lipolytic activity of differentiated cells, and the expression levels of genes involved in adipogenesis and associated with insulin activity. MATERIALS AND METHODS:3T3-L1 cells were induced to differentiate with six commercial insulins: glargine, lispro, aspart, detemir, NPH and regular recombinant human insulin (used as control). Cell differentiation, lipolysis and gene expression were measured at day 7 (D7) and day 10 (D10) after induction of differentiation in these cells. RESULTS:The highest values of cell differentiation and lipolysis were found at D10 for all the insulins used. Preadipocyte differentiation differed at both times depending on the insulin used, with detemir insulin being the least adipogenic. The PPARγ mRNA level varied according to the insulin and was a good genetic marker of adipogenesis at D7. Cells treated with glargine insulin showed the highest lipolysis and HSL expression on both days. Gene expression levels of InsR, SREBP-1c and SCD-1 differed depending on the insulin studied. CONCLUSIONS:Detemir insulin was the least adipogenic of the insulins tested, whereas treatment with glargine insulin tended to produce the highest lipolysis levels. Under these experimental conditions, the modifications made in commercial insulins to improve glycaemic control also affect adipocyte differentiation, the lipolysis level of differentiated cells, and the expression of different genes that can modify metabolic pathways independently of glucose metabolism.
journal_name
Eur J Clin Investjournal_title
European journal of clinical investigationauthors
García-Escobar E,Rodríguez-Pacheco F,Haro-Mora JJ,Gomez-Zumaquero JM,Rubio-Martín E,Gutierrez-Repiso C,Soriguer F,Rojo-Martínez Gdoi
10.1111/j.1365-2362.2011.02492.xsubject
Has Abstractpub_date
2011-09-01 00:00:00pages
979-86issue
9eissn
0014-2972issn
1365-2362journal_volume
41pub_type
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