1.Changes of fusobacterium nucleatum in colorectal cancer patients after radiotherapy
Jianchun LIAN ; Beibei LIU ; Yuanyuan ZHANG ; Junzhong LU ; Yingmei ZHANG ; Yuzhang JIANG ; Xiaoyun ZHANG
International Journal of Laboratory Medicine 2017;38(15):2051-2053
Objective To study the infection rate of fusobacterium nucleatum cancer re appeared in patients with colorectal cancer before and after radiotherapy,and the changes after cancer recarrence.Methods A total of 20 persons receiving physical examination were recruited in the control group and collected the stool specimens,and 40 colorectal cancer patients were selected in the study group.All of the subjects in the study group were collected stool specimens before operation 3 days and after operation 5 day,after radiation therapy 7 days and 30 days.The patients were followed-up 1 year.The bacterial fluid was collected by filtration,and real-time fluorescence quantitative PCR was used to detect the expression of fusobacterium nucleatum gene in feces.Results The positive rate of fecal fusobacterium fusiformis was 30% in the study group and 5% in the control group.The gene relative expression of 12 colorectal cancer patients before operation 3 days and after operation 5 days,after radiation therapy 7 days and 30 days were 5.20±0.34,8.50±0.45,1.20±0.22,0.20±0.15.The fusobacterium nucleatum gene expression of 12 patients with positive fusobacterium after operation 5 days was significantly increased compared with that before operation 3 days(t=10.419,P=0.001),which after radiation therapy 7 days and 30 days was significant lower than that before operation 3 days(t=12.728,P=0.001;t=25.889,P=0.001).Six patients recurred among 1 year,the fusobacterium nucleatum gene expression was 7.2±0.56,which was significant higher than that after radiation therapy 7 days.Conclusion The infection of fusobacterium nucleatum might be a risk factor for colorectal cancer,and the gene relative expression might be an early warning indicator of recurrence.
2.Resveratrol elongates the lifespan and improves antioxidant activity in the silkworm Bombyx mori
Song JIANGBO ; Liu LIAN ; Hao KAIGE ; Mao SHUANG ; Tang YONGXI ; Tong XIAOLING ; Dai FANGYIN
Journal of Pharmaceutical Analysis 2021;11(3):374-382
A number of research has shown that the plant polyphenol resveratrol,one of the most prominent small molecules,has beneficial protective effects in multiple organisms,including worms,flies,and killifish.To understand the effects of resveratrol on lifespan,we evaluated its effects in the silkworm Bombyx mori.In this study,we found that lifespan was significantly prolonged in both female and male silkworms treated with resveratrol.Silkworm larval weight was significantly increased from day 3 of the 5th larval instar(L5D3) to day 7 of the 5th larval instar (L5D7).However,the weight of the pupa,cocoon,and total cocoon was not significantly different in female silkworms with resveratrol treatment than that in controls.Meanwhile,resveratrol significantly improved the thermotolerance of the silkworms,which enhanced their survival rate.Moreover,antioxidant activity was increased by resveratrol in both female and male silkworms.Furthermore,an antioxidant-related signalling pathway,SIRT7-FoxO-GST,was activated in silkworms with resveratrol treatment.Collectively,these results help us to understand the molecular pathways underlying resveratrol induced pro-longevity effects and indicate that silkworm is a promising animal model for evaluating the effects of lifespan-extending drugs.
3.Etiology and intervention measures of comorbid fracture in children with cerebral palsy
Jiahao LIU ; Chao GONG ; Beibei LIAN ; Jin GUO
Chinese Journal of Child Health Care 2024;32(5):511-515
Children with cerebral palsy (CP) frequently experience secondary musculoskeletal issues, with a high incidence of fractures and severe symptoms. These factors cannot be overlooked in the rehabilitation process for children with CP. This article examines the causes of fractures in children with CP, including low bone mineral density, abnormal training, premature delivery, and falls. Furthermore, it outlines intervention measures to improve bone mineral density and exercise training, in order to assist in the prevention and treatment of fractures in children with CP.
4.Screening and bioinformatics analysis of key autophagy-related genes in alcoholic hepatitis
Chao YUAN ; Qinghai LIAN ; Beibei NI ; Yan XU ; Tong ZHANG ; Jian ZHANG
Organ Transplantation 2024;15(1):90-101
Objective To screen key autophagy-related genes in alcoholic hepatitis (AH) and investigate potential biomarkers and therapeutic targets for AH. Methods Two AH gene chips in Gene Expression Omnibus (GEO) and autophagy-related data sets obtained from MSigDB and GeneCards databases were used, and the key genes were verified and obtained by weighted gene co-expression network analysis (WGCNA). The screened key genes were subject to gene ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), protein-protein interaction (PPI) and immune infiltration analyses. Messenger RNA (mRNA)- microRNA (miRNA) network was constructed to analyze the expression differences of key autophagy-related genes during different stages of AH, which were further validated by real-time fluorescence quantitative polymerase chain reaction (RT-qPCR) in the liver tissues of AH patients and mice. Results Eleven autophagy-related genes were screened in AH (EEF1A2, CFTR, SOX4, TREM2, CTHRC1, HSPB8, TUBB3, PRKAA2, RNASE1, MTCL1 and HGF), all of which were up-regulated. In the liver tissues of AH patients and mice, the relative expression levels of SOX4, TREM2, HSPB8 and PRKAA2 in the AH group were higher than those in the control group. Conclusions SOX4, TREM2, HSPB8 and PRKAA2 may be potential biomarkers and therapeutic targets for AH.
5.Mechanism of TLR7 regulating trigeminal neuralgia in ION⁃CCI model rats through NF⁃ κB inflammatory pathway
Hongwei Zhang ; Lian Shen ; Beibei Wu ; Yuanyin Wang ; Liecheng Wang
Acta Universitatis Medicinalis Anhui 2023;58(8):1334-1340
Objective :
To study the role of Toll⁃like receptor 7 (TLR7) in trigeminal nerve pain in SD rats , and to explore the mechanism of TLR7 mediating related inflammatory factors through the activation of NF⁃κB pathway during the process of pain.
Methods :
The rat model of trigeminal neuralgia (TN) was established by infraorbital nerve constriction injury(ION⁃CCI) . The expression of TLR7 in trigeminal ganglion (TG) was detected by qRT⁃PCR and Western blot. Hydroxychloroquine (HCQ) , an inhibitor of TLR7 , was given to ION⁃CCI rats by intragastric administration. The expression of TLR7 and its downstream signal pathway NF⁃κB subunit p65 , p ⁃p65 and inflammatory factors (TNF⁃α , IL⁃1β) in TG were detected.
Results :
After trigeminal nerve injury induced by ligation of infraorbital nerve , the expression of TLR7 in TG of rats significantly increased. After administration of TLR7 inhibitor, the expression of TLR7 , TNF⁃α and IL⁃1β in TG decreased , the translocation and phosphorylation of p65 nucleus decreased , the activation of NF⁃κB signal pathway was inhibited , and the mechanical pain induced by ION⁃CCI was relieved in male SD rats.
Conclusion
TLR7 in TG regulates neuropathic pain by activating NF⁃κB signal pathway in primary sensory neurons and mediating the expression of inflammatory cytokines TNF⁃α and IL⁃1β .
6.Pathological role of PKC/TRPV1 pathway in trigeminal neuralgia in rats
Beibei Wu ; Lian Shen ; Yuanyin Wang ; Liecheng Wang
Acta Universitatis Medicinalis Anhui 2024;59(5):846-851
Objective :
To investigate the pathological role of detect protein kinase C(PKC)/ transient receptor potential vanilloid subtype 1 ( TRPV1) pathway in trigeminal neuralgia ( TN) in rats.
Methods :
The infraorbital nerve⁃chronic constriction injury (ION⁃CCI) was used to establish a rat model of TN. The rats were randomly divided into Sham group , CCI group , CCI + DMSO group and CCI + GF109203X ( a PKC inhibitor) group. The mechanical pain threshold of the rats was measured using a Von Frey brush. qRT⁃PCR and Western blot were used to detect PKC and TRPV1 in the trigeminal ganglion (TG) . HE staining was used to observe the pathological changes of TG.
Results :
The mechanical pain threshold significantly decreased (P < 0. 05) , and the expression of phosphorylated PKC(p⁃PKC) and TRPV1 in TG significantly increased in the CCI group (P < 0. 05) . Histopathological results showed that compared with the Sham group , the CCI group observed significant changes in TG such as increased inflammatory cell infiltration and nerve cell swelling. Injection of GF109203X effectively reduced the phosphorylation of PKC and the expression of TRPV1 in the TG of rats , and the mechanical pain threshold of the rats increased (P < 0. 05) . Under the light microscope , cell swelling and inflammatory cells in the TG were reduced.
Conclusion
PKC/TRPV1 pathway may be involved in trigeminal neuralgia in rats.
7.The role of HMGB1 in trigeminal neuralgia
Lian Shen ; Beibei Wu ; Liecheng Wang ; Yuanyin Wang
Acta Universitatis Medicinalis Anhui 2024;59(3):436-441
Objective :
To construct a rat model of trigeminal neuralgia ( TN) to explore the expression of high mobility group box-1 (HMGB1) in the trigeminal ganglion (TG) and the possible mechanism of HMGB1 effect on pain .
Methods :
TN model was constructed by infraorbital nerve constriction and divided into operation group (CCI group) and Sham group , and the success of the model construction was determined through mechanical pain thresh old assessment. Real time fluorescence quantitative PCR ( RT-qPCR) and Western blot were used to detect high mobility group protein B1 (HMGB1) , Toll receptor 4 (TLR4) , and Nuclear Factor Kappa B(NF-κB) mRNA and protein expression in the ipsilateral trigeminal ganglion (TG) of the Sham and CCI rats . 50 mg/kg HMGB1 inhibi tor glycyrrhizin (GL) was inj ected intraperitoneally every day for two week s , and normal saline (NS) was used as control . The patients were divided into CCI group , CCI + NS group and CCI + GL group . HMGB1 , TLR4 , and NF- κB mRNA and protein expression in the ipsilateral trigeminal ganglion (TG) were detected by RT-qPCR and West ern blot in CCI group , CCI + NS group , and CCI + GL group .
Results :
The mechanical threshold on the operated side of the rat continued to decrease (P < 0.05) , and mechanical pain threshold identification model was success fully constructed . After chronic compressive injury to the infraorbital nerve in rats , HMGB1 , TLR4 , and NF-κB mRNA and protein expression in TG on the operated side increased ( P < 0.05) ; After administration of HMGB1 inhibitor Glcyrrhizin , HMGB1 , TLR4 , NF-κB showed a decrease (P < 0.05) .
Conclusion
HMGB1 is associat ed with TN , and HMGB1 may be involved in the pathogenesis of TN through TLR4/NF-κB signaling pathway.
8.Genetic factors, risk factors and pathogenesis of cerebral palsy comorbid epilepsy
Chao GONG ; Beibei LIAN ; Xuemei LI ; Peng ZHANG ; Fanxu SONG ; Jin GUO
Chinese Journal of Child Health Care 2024;32(2):174-180
Compared to the general population, there is a higher prevalence of epilepsy in individuals with cerebral palsy (CP). Epilepsy serves as an indicator of CP severity and has a significant impact on the early survival and future quality of life of children with CP. Therefore, it is crucial to investigate the shared mechanisms underlying CP and epilepsy. This study aims to summarize the comorbidity of CP and epilepsy from genetic factors, risk factors, and pathophysiological mechanisms, in order to provide a reference for further research.