Cross-Sectional Study on the Gut Microbiome of Parkinson's Disease Patients in Central China
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Study information
-
Quality control
- Retracted paper
- Contamination issues suspected
- Batch effect issues suspected
- Uncontrolled confounding suspected
- Results are suspect (various reasons)
- Tags applied
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
Authors
Mao L, Zhang Y, Tian J, Sang M, Zhang G, Zhou Y, Wang P
Journal
Frontiers in microbiology
Year
2021
Keywords:
Parkinson’s disease, gastrointestinal dysbiosis, gut-brain-axis, short-chain fatty acids, shotgun metagenomic sequencing
Gastrointestinal dysfunction plays an important role in the occurrence and development of Parkinson's disease (PD). This study investigates the composition of the gut microbiome using shotgun metagenomic sequencing in PD patients in central China. Fecal samples from 39 PD patients (PD group) and the corresponding 39 healthy spouses of the patients (SP) were collected for shotgun metagenomics sequencing. Results showed a significantly altered microbial composition in the PD patients. Bilophila wadsworthia enrichment was found in the gut microbiome of PD patients, which has not been reported in previous studies. The random forest (RF) model, which identifies differences in microbiomes, reliably discriminated patients with PD from controls; the area under the receiver operating characteristic curve was 0.803. Further analysis of the microbiome and clinical symptoms showed that Klebsiella and Parasutterella were positively correlated with the duration and severity of PD, whereas hydrogen-generating Prevotella was negatively correlated with disease severity. The Cluster of Orthologous Groups of protein database, the KEGG Orthology database, and the carbohydrate-active enzymes of gene-category analysis showed that branched-chain amino acid-related proteins were significantly increased, and GH43 was significantly reduced in the PD group. Functional analysis of the metagenome confirmed differences in microbiome metabolism in the PD group related to short-chain fatty acid precursor metabolism.
Statistical test
LEfSe
Experiment 1
Needs review
Subjects
- Location of subjects
- China
- Host species Species from which microbiome was sampled (if applicable)
- Homo sapiens
- Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology
- Feces Cow dung,Cow pat,Droppings,Dung,Excrement,Excreta,Faeces,Fecal material,Fecal matter,Fewmet,Frass,Guano,Matières fécales@fr,Merde@fr,Ordure,Partie de la merde@fr,Piece of shit,Porción de mierda@es,Portion of dung,Portion of excrement,Portion of faeces,Portion of fecal material,Portion of fecal matter,Portion of feces,Portion of guano,Portion of scat,Portionem cacas,Scat,Spoor,Spraint,Stool,Teil der fäkalien@de,Feces
- Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
- Parkinson's disease IDIOPATHIC PARKINSON DIS,Idiopathic Parkinson Disease,Idiopathic Parkinson's Disease,IDIOPATHIC PARKINSONS DIS,Idiopathic PD,LEWY BODY PARKINSON DIS,Lewy Body Parkinson Disease,Lewy Body Parkinson's Disease,Paralysis agitans,paralysis agitans,PARKINSON DIS,PARKINSON DIS IDIOPATHIC,Parkinson disease,Parkinson Disease, Idiopathic,Parkinson syndrome,Parkinson's,Parkinson's disease,Parkinson's disease (disorder),Parkinson's disease NOS,Parkinson's disease NOS (disorder),Parkinson's Disease, Idiopathic,Parkinson's Disease, Lewy Body,Parkinson's syndrome,Parkinsonian disorder,Parkinsonism, Primary,Parkinsons,PARKINSONS DIS,PARKINSONS DIS IDIOPATHIC,PARKINSONS DIS LEWY BODY,Parkinsons disease,Primary Parkinsonism
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- Healthy spouses
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- Parkinson's Disease Patients
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- PD patients were diagnosed using the PD diagnostic criteria in the movement disorder society (MDS) 2015. The core standard of diagnosis was to identify if the patient had PD symptoms. The patient was considered as having PD syndromes if he/she had bradykinesia in combination with static tremor and/or muscular rigidity. Upon diagnosis with PD syndrome, further diagnosis was made based on the inclusion and exclusion criteria and warning signs to ensure that the patient was a clinical PD patient.
- Group 0 sample size Number of subjects in the control (unexposed) group
- 39
- Group 1 sample size Number of subjects in the case (exposed) group
- 39
- Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
- 3 months.
Lab analysis
- Sequencing type
- WMS
- Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance
- BGISEQ-500 Sequencing
Statistical Analysis
- Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).
- relative abundances
- Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
- .05
- MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?
- No
- LDA Score above Threshold for the linear discriminant analysis (LDA) score for studies using the popular LEfSe tool
- 2
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- increased
- Chao1 Abundance-based estimator of species richness
- increased
Signature 1
Needs review
Source: Figure 2A and 2B
Description: The stool microbiota profile in PD and SP groups. Differential abundance of genera and species between PD and SP groups identified by LEfSe.
Abundance in Group 1: increased abundance in Parkinson's Disease Patients
Revision editor(s): Jacquelynshevin
Signature 2
Needs review
Source: Figure 2A and 2B
Description: The stool microbiota profile in PD and SP groups. Differential abundance of genera and species between PD and SP groups identified by LEfSe.
Abundance in Group 1: decreased abundance in Parkinson's Disease Patients
Revision editor(s): Jacquelynshevin
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