Neural Circuit Linking Thalamus to Nucleus Accumbens Affects Pain in Mice
Author Information
Author(s): Xi Liu, Xi Zhang, Dongxu Wang, Ya Cao, Zhang Ling, Li Zhonghua, Zhang Qin, Shen Yu, Lu Xian, Fan Keyu, Liu Mingxia, Wei Jingqiu, Hu Siping, Liu He
Primary Institution: Huzhou Central Hospital, Zhejiang Chinese Medical University
Hypothesis
The specific glutamatergic neural circuit projection from the paraventricular nucleus of the thalamus to the nucleus accumbens mediates inflammatory pain in mice.
Conclusion
The study reveals that the PVTGlut→NAc circuit plays a crucial role in modulating inflammatory pain in mice.
Supporting Evidence
- The PVTGlut→NAc circuit was shown to be hyperactive in mice with inflammatory pain.
- Optogenetic stimulation of the PVTGlut→NAc circuit induced pain behaviors in normal mice.
- Inhibition of the PVTGlut→NAc circuit alleviated pain behaviors in CFA-induced inflammatory pain models.
- Increased c-Fos protein expression in PVT neurons was observed in inflammatory pain models.
Takeaway
There is a pathway in the brain that connects two areas, and when it is active, it can make mice feel more pain. If we turn it off, the pain gets better.
Methodology
The study used a mouse model of inflammatory pain induced by complete Freund's adjuvant and employed optogenetics to modulate the PVTGlut→NAc circuit while measuring pain thresholds.
Limitations
The study exclusively used male mice, which may not represent sex differences in pain mechanisms.
Participant Demographics
Male C57BL/6J mice, aged 8–12 weeks.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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