Fei Liu

Dr. Fei Liu


Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 January 2024 in Food & Function
Verified
Journal Article
Closed access
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WDWenhui Duan
Wenhui Duan
LZLingxi Zhou
Lingxi Zhou
YRYilin Ren
Yilin Ren
FLFei Liu
Fei Liu
YXYuzheng Xue
Yuzheng Xue
YGYan Geng
Yan Geng
Juice fermented with lactic acid bacteria (LAB) has received attention due to its health benefits, such as antioxidant and anti-inflammatory. Previous research on LAB-fermented goji juice mainly focused on exploring the changes in the metabolite profile and antioxidant activity in vitro, whereas the liver protection properties of LAB-fermented goji juice in vivo are still unknown. This study aimed to investigate the effects of Lacticaseibacillus paracasei E10-fermented goji juice (E10F), Lactiplantibacillus plantarum M-fermented goji juice (MF), Lacticaseibacillus rhamnosus LGG-fermented goji juice (LGGF) on preventing acute alcoholic liver injury with physiology, gut microbial, and metabolic profiles in mice. Compared with goji juice, E10F, MF, and LGGF enhanced the protective effect against liver injury by reducing serum alanine transaminase (ALT) levels, improving the hepatic glutathione (GSH) antioxidant system, and attenuating inflammation by decreasing the levels of interleukin (IL)-1β, IL-6, tumor necrosis factor (TNF)-α, and transforming growth factor (TGF)-β. Furthermore, E10F, MF, and LGGF increased intestinal integrity, restructured the gut microbiota including Bacteroides and Lactobacillus, and altered gut microbial metabolites including kyotorphin, indolelactic acid, and N-methylserotonin. Pretreatment of different LAB-fermented goji juice in mice showed significant differences in gut microbiota and metabolism. The correlation analysis demonstrated that the increase of Lactobacillus, indolelactic acid, and N-methylserotonin by E10F, MF, and LGGF was positively correlated with reduced inflammation and improved liver and gut function. Taken together, E10F, MF, and LGGF all have the potential to be converted into dietary interventions to combat acute alcoholic liver injury. It provided a reference for the study of the hepatoprotective effect of LAB-fermented goji juice.

16 April 2024 in NeuroImage
Verified
Journal Article
Open access
ZXZhiyong Xiao
Zhiyong Xiao
YZYuhong Zhang
Yuhong Zhang
ZDZhaohong Deng
Zhaohong Deng
FLFei Liu
Fei Liu
The morphological analysis and volume measurement of the hippocampus are crucial to the study of many brain diseases. Therefore, an accurate hippocampal segmentation method is beneficial for the development of clinical research in brain diseases. U-Net and its variants have become prevalent in hippocampus segmentation of Magnetic Resonance Imaging(MRI) due to their effectiveness, and the architecture based on Transformer has also received some attention. However, some existing methods focus too much on the shape and volume of the hippocampus rather than its spatial information, and the extracted information is independent of each other, ignoring the correlation between local and global features. In addition, many methods cannot be effectively applied to practical medical image segmentation due to many parameters and high computational complexity. To this end, we combined the advantages of CNNs and ViTs (Vision Transformer) and proposed a simple and lightweight model: Light3DHS for the segmentation of the 3D hippocampus. In order to obtain richer local contextual features, the encoder first utilizes a multi-scale convolutional attention module (MCA) to learn the spatial information of the hippocampus. Considering the importance of local features and global semantics for 3D segmentation, we used a lightweight ViT to learn high-level features of scale invariance and further fuse local-to-global representation. To evaluate the effectiveness of encoder feature representation, we designed three decoders of different complexity to generate segmentation maps. Experiments on three common hippocampal datasets using two metrics demonstrate that the network achieves more accurate hippocampus segmentation with fewer parameters. Light3DHS performs better than other state-of-the-art algorithms.

16 July 2015 in BMC Complementary and Alternative Medicine
Verified
Journal Article
Open access
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FLFei Liu
Fei Liu
JYJianer Yu
Jianer Yu
LBLi Bai
Li Bai
ZXZheng Xue
Zheng Xue
XZXinguang Zhang
Xinguang Zhang
Pingchuan Formula (PCF) is a traditional Chinese recipe. PCF improves chronic airway inflammation by correcting the imbalance of T-helper cell ratio. The purpose of this study was to investigate the effect of PCF on pathological changes in the lungs of asthmatic mice in terms of Treg/Th17 balance. A bronchial asthma BALB/c mouse model was established using the ovalbumin excitation method. Distilled water (for MDL group) and drugs (for DEX or PCF group) were administered by gavage immediately after the first excitation. Mice were sacrificed after 7 and 28 d treatment. Lung tissues and bronchoalveolar lavage fluid were collected and lung pathological changes were observed after hematoxylin and eosin staining. Differential cell counts, concentrations of interleukins-6, -17, -23 and TGF-β in bronchoalveolar lavage fluid were determined by enzyme-linked immunosorbent assay. Expression of transcriptional factors Foxp3 and RORγt was determined by immunohistochemistry and immunoblot. An asthma model was successfully established. After 7 or 28 d treatment, lung pathological changes were improved and concentration of interleukins-6, -17, -23 and TGF-β in bronchoalveolar lavage fluid significantly decreased in the PCF group. RORγt expression in lung tissue was decreased in the PCF group, while Foxp3 expression increased (all P values < 0.05 compared with the MDL group). There was no significant difference between the PCF and DEX group except that mice in the PCF group lost less bodyweight. Treatment with PCF downregulates RORγt, elevates Foxp3 expression, reduces interleukins-6, -17, -23 and TGF-β in bronchoalveolar lavage fluid, thus restoring Th17/Treg balance, improving airway inflammation and reducing asthma symptoms.

1 January 2020 in BioMed Research International
Verified
Journal Article
Open access
PDF file
FLFei Liu
Fei Liu
LBLi Bai
Li Bai
ZXZheng Xue
Zheng Xue
WPWei Pan
Wei Pan
JYJianer Yu
Jianer Yu
Pingchuan formula (PCF) was created by Professor Yu Jianer. The purpose of this study was to investigate the effect of PCF on dendritic cells (DCs) and toll‐like receptors (TLRs) in initiating immunity. A bronchial asthma BALB/c mouse model was established using an OVA excitation method. PCF was immediately administered by gavage after the first excitation. After 7 d, hematoxylin and eosin (HE) staining was used to observe the pathological changes in the asthma model. Eosinophil infiltration and concentrations of IL‐4, IFN‐r, IL‐12, and IFN‐α in BALF were determined by enzyme‐linked immunosorbent assay (ELISA). Real‐time PCR was used to determine mRNA levels of IL‐12 and IFN‐α. Protein expression levels of ERK, Toll‐2, IDO, and Toll‐9 were measured by immunoblot. HE and ELISA showed that PCF could improve lung pathological changes and significantly decrease the concentration of IL‐4 in BALF. Moreover, PCF could increase IL‐12, IFN‐α, and IFN‐r in BALF. Real‐time PCR and western blot showed that PCF restored the DCs and TLRs in initiating immunity. In summary, this study found that PCF can improve the pathological changes and reduce the symptoms of asthma in a BALB/c mouse model. It can facilitate the initiation of immunity by restoring the DCs and TLRs.