Impaired Protein Tyrosine Phosphatase 1B in Diabetic Sand Rats
Author Information
Author(s): Yukio Ikeda, Ehud Ziv, Eleazar Shafrir, Luitgard Mosthaf-Seedorf
Primary Institution: Hagedorn Research Institute, Gentofte, Denmark; Diabetes Research Unit, Hadassah University Hospital, Jerusalem, Israel
Hypothesis
Alterations in the protein expression level or activity of PTPases could contribute to the development or progression of insulin resistance.
Conclusion
Diabetic Psammomys obesus exhibit impaired PTP 1B activity in skeletal muscle, suggesting it is not causally related to insulin resistance.
Supporting Evidence
- PTP 1B expression was increased by 83% in diabetic animals compared to diabetes-resistant ones.
- PTP 1B activity significantly decreased by 50% to 56% in diabetic animals.
- An inverse correlation was found between PTP 1B activity and serum glucose levels.
Takeaway
The study found that a protein important for insulin signaling is overproduced but not working properly in diabetic sand rats.
Methodology
The study involved measuring protein expression and activity of PTPases in skeletal muscle and liver tissues of diabetic and non-diabetic sand rats.
Limitations
The study primarily focused on one animal model, which may limit the generalizability of the findings.
Participant Demographics
Male and female Psammomys obesus from diabetes-resistant and diabetes-prone lines.
Statistical Information
P-Value
p<0.02
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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