Title:Curcumin Reverts the Protein Differential Expression in the Liver of the Diabetic Obese db/db mice
VOLUME: 18
Author(s):Oscar Gerardo Silva-Gaona, Juan Manuel Guzmán-Flores, Magdalena Hernández-Ortiz, Katya Vargas-Ortiz, Joel Ramírez-Emiliano, Sergio Encarnación-Guevara and Victoriano Pérez-Vázquez*
Affiliation:Dpto. de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Depto. de Salud, División de Ciencias Biomédicas, Centro Universitario de los Altos, Universidad de Guadalajara, Tepatitlán, Jalisco, Centro de Ciencias Genómicas, UNAM, Cuernavaca, Morelos, Dpto. de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Dpto. de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Dpto. de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Dpto. de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato
Keywords:Carbohydrate metabolism, Curcumin, db/db mice, Diabetes, Liver proteome, Obesity.
Abstract:Background: In type 2 diabetic mouse liver, hyperglycemia, and insulin modify gene expression. Curcumin is a
powerful antioxidant and antidiabetic agent that regulates the gene expression of different signaling pathways through
various transcription factors. Therefore, we hypothesized that curcumin modifies the protein expression profile in the liver
of diabetic db/db mice.
Objective: To determine the effects of curcumin on the liver protein profile of diabetic db/db mice.
Methods: db/db and wild type (WT) male mice were allocated in four groups, and they were fed for eight weeks. Three WT
and three diabetic db/db mice received a standard diet (SD; WT and db/db groups, respectively); three WT and three
diabetic db/db mice received a SD supplemented with 0.75 % (w/w) curcumin (WT+C and db/db+C groups, respectively).
Liver proteins were separated by 2D electrophoresis. Differential protein expression analysis was performed on
ImageMaster 2D Platinum software, and selected proteins were identified by MALDI-TOF-MS and subjected to enrichment
analysis using STRING and DAVID databases.
Results: Thirty-six proteins with differential expression due to the diabetic background and curcumin treatment were found;
these proteins participate in the metabolism of amino acids, carbohydrates, and lipids. Interestingly, the altered expression of
seven proteins was prevented in the liver of the diabetic mice that received curcumin.
Conclusions: Among all differentially expressed proteins, curcumin reverted the altered expression of seven proteins. Thus,
although it was observed that curcumin did not affect the biochemical parameters, it does modify the expression of some
liver proteins in diabetic mice.
