Gene Expression Patterns in Different Wool Densities of Rex Rabbit Using cDNA Microarray

This study was carried out to identify gene expression patterns in different wool densities of rex rabbit. The mid-dorsal skin samples from 8 rex rabbits were studied. They were divided into two groups according to different wool densities. Total RNA was isolated and labeled by reverse transcription reaction with Cy5-dCTP and Cy3-dCTP for cDNA probe. The cDNA probe was hybridized with cDNA microarrays containing 14 601 rabbit’s genes. The differently expressed genes were analysed with the Gene Ontology （GO） classification and the pathway analysis. Hierarchical clustering was performed to clarify genes in association with different wool densities. The 2 657 differentially expressed genes were identified. Among them, 1 103 genes were functionally known genes, 687 genes were up-regulated and 419 were down-regulated. GO analysis indicated that these altered genes were associated with metabolism, signal transduction, cell cycle, cell adhesion, cell proliferation, cell division, apoptosis, and other processes. KEGG analysis showed that 95 signal pathways associated with up-regulated genes and 87 signal pathways associated with down-regulated genes had changed significantly （P0.05）. Some important differentially expressed genes in different wool densities of rex rabbit were identified, such as MMP2, TGF-β1, TGF-β2, IGF-1, ITGB1, RPS6KB1, BMP2, ActRIIB, CDK2, and CCNA2. Hierarchical clustering analysis separated the differentially expressed genes into 5 main characteristic groups. Data from cDNA microarray experiments clearly distinguished between group A and group B. Some important genes were identified, which might be useful in further study on wool density markers of rex rabbit.

Study on mechanism of Radix astragali-Lithospermum erythrorhizon in treatment of diabetic ulcer based on network pharmacology

Objective:To explore the mechanism of Radix Astragali-Lithospermum Erythrorhizon on the treatment of diabetic ulcer through the method of network pharmacology.Methods:This study included 32 compounds and 81 key targets.100 GO functional items and 116 KEGG signal pathways were obtained by enrichment analysis.Quercetin,kaempferol,isorhamnetin,mononetin,sitosterol,ivy sapogenin and other components of astragalus-purple herb play a key role in the targets of interleukin-6,cystatin 3,vascular endothelial growth factor,epidermal growth factor receptor and mitogen-activated protein kinase 8 in diabetic ulcer,and are mainly concentrated in AGE-RAGE,TNF and other signal pathways.Results:There were 32 compounds and 81 key targets.100 GO functional items and 116 KEGG signal pathways were obtained by enrichment analysis.Quercetin,kaempferol,isorhamnetin,mononetin,sitosterol,ivy sapogenin and other components of astragalus-purple herb play a key role in the targets of interleukin-6,cystatin 3,vascular endothelial growth factor,epidermal growth factor receptor and mitogen-activated protein kinase 8 in diabetic ulcer,and are mainly concentrated in AGE-RAGE,TNF and other signal pathways.Conclusion:Radix Astragali-Lithospermum Erythrorhizon may play the role of inhibiting inflammation,anti-apoptosis,promoting cell proliferation,angiogenesis and immune regulation through multi-components and multitargets,and play a role in the treatment of diabetic ulcer.

Mechanism of Wumei Pill in the Treatment of Non-Erosive reflux disease from the Perspective of Network Pharmacology and Molecular docking

Objective:Based on network pharmacology and molecular docking to explore the mechanism of Wumei Pill in the treatment of non-erosive reflux disease(NERD).Method:We collected the active ingredients and targets of Wumei Pill by Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform(TCMSP),and collected NERD related targets through Genecards,PharmGKB,Drugbank,DisGeNET,OMIM,CTD and TTD databases.Intersection targets of Wumei Pill targets and NERD related targets were the potential targets of Wumei Pill in the treatment of NERD.We imported the intersection targets into the STRING database to obtain the PPI network,and obtained the hub targets.The network diagram of"Drugs-Potential active ingredients-Potential targets"was constructed by Cytoscape 3.7.2 software.We used R software to perform Gene Ontology function enrichment analysis(GO)and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis(KEGG)on hub targets,and then performed molecular docking verification.Results:There were 129 active ingredients and 213 drug targets of Wumei Pill of which 114 were the intersection targets.1587 GO enrichment items were identified(P<0.05),including 1,491 biological processes,11 cell components,and 85 molecular functions.143 KEGG pathways(P<0.05),mainly related to Kaposi sarcoma-associated herpesvirus infection,IL-17 signaling pathway,the TNF signaling pathway,MAPK signaling pathway.Results of molecular docking showed that the potential active ingredients in Wumei Pill had relatively stable binding activity to the key targets.Conclusion:Wumei pill for the treatment of non-erosive reflux disease are main active ingredients quercetin,kaempferol,beta sitosterol,Isocorypalmine,Stigmasterol,rutaecarpine,etc,the main targets is JUN,TP53,AKT1,may inhibit excessive inflammation,antioxidant therapy effect into full play.This provided a certain theoretical basis for clinical application.