scholarly journals Microarray Analysis of Potential Biomarkers for brachial plexus avulsion caused neuropathic pain

2021 ◽  
Author(s):  
Le Wang ◽  
Jie Lao
Keyword(s):  
Neuropathic Pain ◽  
Brachial Plexus ◽  
Signaling Pathway ◽  
Quantitative Polymerase Chain Reaction ◽  
Control Group ◽  
Rt Pcr ◽  
Pain Group ◽  
Brachial Plexus Avulsion ◽  
Neurotrophin Signaling ◽  
Potential Biomarkers

Nerve injury-induced neuropathic pain remains a challenging clinical problem due to a lack of satisfactory treatment. Pain after BPA (Brachial Plexus Avulsion) is resistant to most traditional pain relief treatments due to the lack of understanding of the cellular or molecular mechanism of pain development. The present study aimed to investigate the expression of mRNA in the brachial plexus avulsion neuropathic pain model and analyze biological functions. Sprague-Dawley rats were treated with complete brachial plexus avulsion. An animal behavior test was carried out to distinguish the pain group from the control group. In this study, a microarray mRNA assay and reverse transcriptase quantitative polymerase chain reaction (RT-PCR) was conducted. The whole blood was collected from two groups for Microarray mRNA analysis. The predicted mRNA targets were studied by gene ontology analysis and pathway analysis. The PIK3CB, HRAS, and JUN genes were verified by RT-PCR. In total, differentially expressed genes(DEGs) were identified between individuals with or without neuropathic pain (case and control), and A biological processes were enriched. We identified 3 targeted mRNAs, including PIK3CB, HRAS, and JUN, which may be potential biomarkers for BPA-caused NP. The results showed that PIK3CB, HRAS, and JUN gene expression was increased in the control group but decreased in the neuropathic pain group. The PIK3CB gene was part of the Neurotrophin signaling pathway. The function of the HRAS gene was synergetic in the aspect of axon guidance and the Neurotrophin signaling pathway. The JUN gene participates in axon regeneration. These results suggest that PIK3CB, HRAS, and JUN genes might become potential biomarkers for the prediction of and new targets for the prevention and treatment of neuropathic pain after BPA. These findings indicate that mRNA expression changes in the blood may play an important role in the development of NP after BPA, which is of theoretical and clinical importance for future research and clinical-treatment strategies.

scholarly journals Evaluation of Neuropathic Pain in a Rat Model of Total Brachial Plexus Avulsion from Behavior to Brain Metabolism

2019 ◽  
Vol 3 (22;3) ◽  
pp. E215-E224
Author(s):  
Jian-Guang Xu
Keyword(s):  
Spinal Cord ◽  
Neuropathic Pain ◽  
Brachial Plexus ◽  
Small Animal ◽  
Small Animal Pet ◽  
Control Group ◽  
Brachial Plexus Avulsion ◽  
Pet Ct ◽  
The Right ◽  
Experimental Group

Background: Approximately 30% to 80% of patients with brachial plexus avulsion (BPA) developed neuropathic pain. It is an intolerable neuropathic pain, which brings heavy burden to family and society. In addition to motor and sensory deficits, neuropathic pain can be another serious sequela that equally influences the patient. The development of a microsurgical technique has promoted the treatment and rehabilitation of brachial plexus injury, but pain relief after BPA is still a difficult problem. Objectives: The present study aimed to semi-quantify changes in the behavior, spinal cord and cerebral metabolism in a neuropathic pain model following BPA injury in rats. Study Design: Controlled animal study. Setting: Institute of Rehabilitation Medicine, Shanghai, China. Methods: A total of 15 Sprague-Dawley rats, weighing 200 to 220 g, were randomly divided into 2 groups: experimental group (n = 10) and control group (n = 5). In the experimental group, neuropathic pain induced by BPA was established by directly avulsing the C5, C6, C7, C8, and T1 roots on the right side from the spinal cord. Rats in the control group only received openclose surgery. The autotomic behavior of biting their own digits was recorded and scored at 2 months after the surgery. Small animal positron emission tomography/computed tomography (PET/CT) images after injection of a 2-[18F]-fluoro-2-deoxy-D-glucose (18F-FDG) tracer were acquired to evaluate glucose metabolism in pain-related brain regions before and after the surgery, respectively. Semi-quantitative values of cortical to cerebellum standardized uptake value (SUV) ratios were calculated. Then, the animals were euthanized and the cervical segments of the spinal cord were removed for detection of glial fibrillary acidic protein (GFAP) expression in the astrocytes by immunohistochemical assay. Results: Nine of the 10 rats (90%) in the experimental group showed autotomic behavior at 2 months after the surgery. Slight autotomic behavior was noted only in one of 5 rats (20%) from the control group. The autotomic score in the experimental group was significantly higher than that in the control group (5.4 ± 1.0 vs. 0.2 ± 0.4, P < 0.05). The experimental group showed significantly higher SUV ratio in both the right and left thalamus, compared to the control group (P < 0.05). Immunohistochemical assay demonstrated that GFAP positive astrocytes in the dorsal horn at the injured side significantly increased compared to the control group (P < 0.05). Limitations: There are differences between small animals and human beings, and the structure and function of the human brain is more complex than in rodents. Therefore, extrapolation of the present conclusion should be cautious. Conclusions: The present study reported a unique model of neuropathic pain following total BPA in rodents, which was demonstrated by a higher rate and score of autotomic behavior. More astrocytes were found activated in the spinal cord at the corresponding level of C5 and C6 spinal cord. In the small animal PET/CT imaging, significantly higher standardized glucose metabolic activity was found in both the right and left thalamus in the experimental group. The present study semi-quantified the neuropathic pain behavior in rats and explored the plastic changes in the spinal and brain metabolism. Key words: Brachial plexus avulsion, small animal PET/CT, glucose metabolism, neuropathic pain, astrocyte, 18F-FDG

scholarly journals Inhibition of PTEN Gene Expression by Small Interfering RNA on PI3K/Akt/FoxO3a Signaling Pathway in Human Nasopharyngeal Carcinoma

2020 ◽  
Vol 19 ◽  
pp. 153303382091795
Author(s):  
Liang Zhong Yao ◽  
Yan Li Zhu ◽  
Jun Jie Liu
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Signaling Pathway ◽  
Messenger Rna ◽  
Small Interfering Rna ◽  
Quantitative Polymerase Chain Reaction ◽  
Pten Gene ◽  
Control Group ◽  
Expression Levels ◽  
Human Nasopharyngeal Carcinoma ◽  
Interfering Rna

The objective of this article is to study the effect of inhibiting phosphatase and tensin homolog deleted chromatosome 10 gene on phosphoinositide 3-kinase/protein kinase B ( Akt)/Forkhead homeobox O3a signaling pathway in human nasopharyngeal carcinoma HK-1 cells. Nasopharyngeal carcinoma HK-1 cell lines were divided into PTEN gene interference group (siPTEN), nonspecific small interfering RNA group (siNC), empty vector group (Vector), and no transfection control group (Normal). The mRNA and protein expression levels of PTEN, PI3K, p-Akt, and FoxO3a were detected by real-time fluorescence quantitative polymerase chain reaction and Western blot. Immunofluorescence was used to detect the subcellular localization of PTEN, PI3K, p-Akt, and FoxO3a in HK-1 cells. The proliferation of HK-1 cells was detected by MTT assay, and the apoptosis of HK-1 cells was detected by flow cytometry. Compared with the siNC group, the expression levels of PTEN, FoxO3a messenger RNA, and protein in the siPTEN group were significantly decreased ( P < .05), while the expression levels of PI3K, p-Akt messenger RNA, and protein were significantly increased ( P < .05). The growth rate of HK-1 cells in the siPTEN group was significantly higher than the siNC group ( P < .05), while the apoptosis rate was significantly lower than that of the siNC group ( P < .05). Small interfering RNA can inhibit the expression of PTEN in HK-1 cells, and PTEN can participate in the development of NPC by affecting PI3K/Akt/FoxO3a signaling pathway.

scholarly journals Neuropathic Pain-Like Behavior after Brachial Plexus Avulsion in Mice: The Relevance of Kinin B1 and B2 Receptors

2008 ◽  
Vol 28 (11) ◽  
pp. 2856-2863 ◽  
Author(s):  
N. L. M. Quintao ◽  
G. F. Passos ◽  
R. Medeiros ◽  
A. F. Paszcuk ◽  
F. L. Motta ◽  
...  
Keyword(s):  
Neuropathic Pain ◽  
Brachial Plexus ◽  
Brachial Plexus Avulsion ◽  
B2 Receptors

scholarly journals Effect of Curcumol on the Fenestrae of Liver Sinusoidal Endothelial Cells Based on NF-κB Signaling Pathway

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Yang Zheng ◽  
Jiahui Wang ◽  
Jiaru Wang ◽  
Haiyuan Xie ◽  
Tiejian Zhao
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Signaling Pathway ◽  
Intervention Group ◽  
Positive Control ◽  
Positive Control Group ◽  
Control Group ◽  
Rt Pcr ◽  
Liver Sinusoidal Endothelial Cells ◽  
Scanning Electron

Objective. To study the effect of curcumol on liver sinusoidal endothelial cells (LSECs) and to analyze the mechanism of antihepatic fibrosis. Methods. The effects of drug intervention on cell proliferation rates were detected by MTT assay. The expression of NF-κB was detected by RT-PCR and WB. The NF-κB expression and entry into the nucleus were detected by immunofluorescence; scanning electron microscopy was used to observe the changes of LSECs fenestrae. Results. MTT results showed that the interference of cell proliferation in each group was small. RT-PCR showed that the expression of NF-κB in the curcumol intervention group was significantly lower than that in the positive control group (P<0.05). The WB detection found that, in the curcumol intervention group, the expression of pNF-κB in the NF-κB signaling pathway was significantly lower than that in the positive control group (P<0.05). Scanning electron microscopy showed that the LSEC fenestrae were significantly improved compared with the positive control group. Conclusion. Curcumol may be one of the mechanisms of antihepatic fibrosis by inhibiting the activity of the NF-κB signaling pathway and increasing the fenestrae of LSECs.

scholarly journals Intermittent Stretching and Osteogenic Differentiation of Bone Marrow Derived Mesenchymal Stem Cells via the p38MAPK-Osterix Signaling Pathway

2015 ◽  
Vol 36 (3) ◽  
pp. 1015-1025 ◽  
Author(s):  
Wen-lin Xiao ◽  
Dai-zun Zhang ◽  
Cun-hui Fan ◽  
Bao-jun Yu
Keyword(s):  
Western Blot ◽  
Osteogenic Differentiation ◽  
Signaling Pathway ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Mechanical Strain ◽  
Control Group ◽  
Rt Pcr ◽  
Rnai Technology ◽  
P38mapk Signaling

Aims: The relationship between the p38MAPK signaling pathway and osterix in osteogenic differentiation of BMMSCs subjected to intermittent stretching was investigated. Methods: BMMSCs derived from C57BL/6J mice were divided into the following groups: 1) control, 2) stretch, and 3) SB203580+stretch (SB203580 is a p38MAPK signal pathway inhibitor). BMMSCs were exposed to an intermittent mechanical strain of 0.8% (8000μ strain) at 0.5 Hz, twice a day for 30 min each application. BMMSCs were harvested on days 1, 3, and 5 post-treatment. The expression of ALP, COL I, OCN, and osterix mRNA was assessed utilizing RT-PCR while the expression of P-p38MAPK and osterix protein was assessed by Western blot analysis. The osterix gene in mouse BMMSCs was knocked down using RNAi technology and its protein expression was also assessed by Western blot. RT-PCR was used to detect ALP, COL I, and OCN mRNA expression. Results: Intermittent stretching was found to promote expression of ALP, COL I, OCN, and osterix mRNA. Silencing the osterix gene was found to reduce levels of ALP, COL I, and OCN mRNA. Western blot analysis demonstrated that the levels of osterix and P-p38MAPK proteins in the stretch group were significantly higher than in the control group (P<0.05). There was less expression of ALP, COL I, OCN, and osterix mRNA in the SB203580+stretch group than in the control and stretch groups. Conclusions: Data demonstrate that intermittent stretching promotes osteogenic differentiation of BMMSCs, and the p38MAPK-osterix pathway has an important role in the control of osteogenesis-related gene expression.

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