The non-motor symptoms (NMS) of Parkinson’s disease (PD) are found in more than 90% of
patients with PD. Here, we explored the effects of electroacupuncture (EA) stimulation at
Zhong wan (CV-12), Qihai (RN-7), Zusanli (ST-36) and Taichong (LR-3) on NMS and brain-gut
peptides of PD. We found that EA intervention alleviated the motor deficit induced by
6-OHDA in rats indicated by the decreased abnormal involuntary movements (AIMs) scores and
the net number of rotations and increased cylinder test grade. It also improved the
spatial memory and attenuated anxiety-like and depression of PD model rats. EA treatment
significantly inhibited neuronal apoptosis in PD model animals, as demonstrated by the
increased number of TH positive cells and reduced number of apoptotic cells in the
substantia nigra. The expression of cleaved caspase-3 and cleaved PARP in PD model rats
was markedly suppressed by EA stimulation. Moreover, EA remarkably inhibited the
inflammatory response in PD model rats, as revealed by the decreased levels of TNF-α,
IL-1β, and
COX-2
mRNA expression. It also attenuated the oxidative stress
in rats, as indicated by the increased levels of SOD and GSH and the decreased level of
MDA. EA treatment contributed to alleviating PD by regulating brain-gut peptides in rats,
such as NPY, CCK, SST, GAS, and PYY. In conclusion, EA stimulation at CV-12, RN-7, ST-36,
and LR-3 effectively alleviates the NMS of PD partly through regulating the levels of
brain-gut peptides.