Genetic and dietary salt contributors to insulin resistance in Dahl salt-sensitive (S) rats
2008
Salt and Insulin Resistance in Dahl Rats
Commentary
Evidence: moderate
Author Information
Author(s): Marlene Shehata
Primary Institution: University of Ottawa Heart Institute
Hypothesis
What percentage of dietary salt and for what duration of exposure would we expect an enhanced insulin resistance in Dahl S rats?
Conclusion
High salt diet significantly enhances insulin resistance in Dahl S rats after 4 weeks of exposure.
Supporting Evidence
- Insulin resistance in Dahl S rats is a genetic trait that is inherited and manifested prior to salt-sensitive hypertension.
- 4 weeks of high salt diet of 8% NaCl exaggerated insulin resistance and contributed to stable hypertension in Dahl S rats.
- Salt-induced oxidative stress and inflammation might be the mechanism by which high dietary salt concentration suppresses insulin signaling.
Takeaway
Eating a lot of salt can make certain rats have trouble using insulin, which is important for controlling sugar in their blood.
Methodology
Dahl S rats were examined at various stages and with different dietary salt regimens to assess insulin resistance.
Limitations
Controversial reports exist regarding the effect of dietary salt on insulin resistance.
Participant Demographics
Dahl salt-sensitive (S) and salt-resistant (R) rats.
Digital Object Identifier (DOI)
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