Related Experiment Video
Updated: Jul 5, 2026
10:32
Assessment of Sensorimotor Function in Mouse Models of Parkinson's Disease
Published on: June 17, 2013
Distinct Olfactory Bulb-Cortex Neural Circuits Coordinate Cognitive Function in Parkinson's Disease
Shuai-Shuai Wang1, Xing-Feng Mao2, Zhi-Shen Cai1
1Medical Basic Research Innovation Center for Cardiovascular and Cerebrovascular Diseases, Ministry of Education, China; International Joint Laboratory for Drug Target of Critical Illnesses, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China.
Research (Washington, D.C.)
|October 3, 2024
Summary
Parkinson's disease (PD) cognitive decline is linked to olfactory system dysfunction. Aberrant neural coherence in the olfactory bulb and piriform cortex may predict and treat cognitive impairment in PD.
Area of Science:
- Neuroscience
- Neurodegenerative Diseases
- Olfactory System Research
Background:
- Cognitive dysfunction is a major non-motor symptom in Parkinson's disease (PD).
- Olfactory system dysfunction predicts cognitive decline in PD, but the underlying mechanisms remain unclear.
Purpose of the Study:
- To investigate the link between olfactory circuit abnormalities and cognitive dysfunction in Parkinson's disease.
- To identify specific neural mechanisms and potential therapeutic targets within the olfactory system for PD-related cognitive impairment.
Main Methods:
- Utilized clinical functional MRI (fMRI) to assess functional connectivity in olfactory pathways.
- Employed Parkinson's disease mouse models to study neural coherence in the olfactory system.
- Conducted transcriptomic and genetic analyses to identify key molecular players.
- Developed and tested a novel deep brain stimulation protocol in the olfactory bulb.
Main Results:
- Demonstrated abnormal functional connectivity between the olfactory bulb (OB) and piriform cortex (PC)/entorhinal cortex (EC) in PD patients and mice.
- Identified two distinct OB mitral/tufted (M/T) cell subpopulations projecting to aPC and EC, crucial for cognitive memory via neural coherence.
- Discovered a potential role for biorientation defective 1 (Bod1) in OB M/T cell-mediated cognitive function.
- Showed that olfactory bulb deep brain stimulation improved cognitive function in Bod1-deficient and PD mice.
Conclusions:
- Aberrant coherent activity in the olfactory system is a potential biomarker for assessing cognitive function in Parkinson's disease.
- The olfactory system, particularly OB M/T cell pathways, represents a promising therapeutic target for treating cognitive dysfunction in PD.
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