Paper Information

Journal:   IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES   MAY 2018 , Volume 21 , Number 5; Page(s) 489 To 494.
 
Paper: 

INSULIN GLARGINE AFFECTS THE EXPRESSION OF IGF-1R, INSR, AND IGF-1 GENES IN COLON AND LIVER OF DIABETIC RATS

 
 
Author(s):  JUAREZ VAZQUEZ CLARA I, GURROLA DIAZ CARMEN M., VARGAS GUERRERO BELINDA, DOMINGUEZ ROSALES JOSE A., RODRIGUEZ ORTIZ JESSICA F., BARROS-NUNEZ PATRICIO, FLORES MARTINEZ SILVIA E., SANCHEZ CORONA JOSE, ROSALES REYNOSO MONICA A.*
 
* DIVISI?N DE MEDICINA MOLECULAR, CENTRO DE INVESTIGACI?N BIOMEDICA DE OCCIDENTE. INSTITUTO MEXICANO DEL SEGURO SOCIAL. GUADALAJARA, JALISCO, MEXICO
 
Abstract: 

Objective (s): The mitogenic effect of the analogous insulin glargine is currently under debate since several clinical studies have raised the possibility that insulin glargine treatment has a carcinogenic potential in different tissues. This study aimed to evaluate theIgf-1r, Insr, and Igf-1 gene expression in colon and liver of streptozotocin-induced diabetic rats in response to insulin glargine, neutral protamine Hagedorn (NPH) insulin, and metformin treatments.
Materials and Methods: Male Wistar rats were induced during one week with streptozotocin to develop Type 2 Diabetes (T2D) and then randomly distributed into four groups. T2D rats included in the first group received insulin glargine, the second group received NPH insulin, the third group received metformin; finally, untreated T2D rats were included as the control group. All groups were treated for seven days; after the treatment, tissue samples of liver and colon were obtained. Quantitative PCR (qPCR) was performed to analyze theIgf-1r, Insr and Igf-1 gene expression in each tissue sample.
Results: The liver tissue showed overexpression of the Insr and Igf-1r genes (P>0.001) in rats treated with insulin glargine in comparison with the control group. Similar results were observed for the Insr gene (P>0.011) in colonic tissue of rats treated with insulin glargine.
Conclusion: These observations demonstrate that insulin glargine promote an excess of insulin and IGF-1 receptors in STZ-induced diabetic rats, which could overstimulate the mitogenic signaling pathways.

 
Keyword(s): COLON, DIABETES, INSULIN GLARGINE, LIVER, METFORMIN, NPH INSULIN, RATS
 
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