Rgs16 Knockdown Mice Show Altered Circadian Rhythms and Food Anticipatory Activity
Author Information
Author(s): Hayasaka Naoto, Aoki Kazuyuki, Kinoshita Saori, Yamaguchi Shoutaroh, Wakana Shigeharu, Murakami Takamichi, Ramabhadran Ram, Miyazawa Masaaki, Shibata Shigenobu
Primary Institution: Kinki University School of Medicine
Hypothesis
What is the role of RGS16 in the circadian clock in vivo?
Conclusion
The study found that RGS16 is involved in regulating both food-entrained and light-entrained circadian rhythms.
Supporting Evidence
- The knockdown mice showed a significantly shorter free-running period of locomotor activity rhythms compared to wild-type siblings.
- Food-entrainable oscillator-driven elevated food-anticipatory activity was significantly attenuated in the knockdown mice.
- The phase shift of the Per2 clock gene expression in liver and thalamus was not observed in the knockdown mice.
Takeaway
Scientists created special mice that couldn't make a protein called RGS16, and they found that these mice had trouble with their daily rhythms and didn't get excited about food like normal mice do.
Methodology
The researchers generated Rgs16 knockdown mice using lentiviral vectors expressing shRNA and assessed their locomotor activity and gene expression.
Potential Biases
Potential bias due to the use of specific mouse strains and the focus on only two regions of the brain.
Limitations
The study did not explore the long-term effects of Rgs16 knockdown on overall health and behavior.
Participant Demographics
C57BL/6J inbred mice were used for the experiments.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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