1.Gene research progress of hypomyelinating leukodystrophies
Kexin PANG ; Min ZHU ; Jian TANG ; Le DING
Chinese Journal of Applied Clinical Pediatrics 2024;39(1):69-73
Hypomyelinating leukodystrophies (HLDs) are a group of neurodegenerative diseases characterized by decreased myelination in the central nervous system, with diverse clinical manifestations like psychomotor retardation and dyskinesia.Some HLDs patients have epilepsy, microcephaly and other clinical manifestations.At present, there is no specific treatment of HLDs, and the prognosis is usually poor.At present, with the wide application of gene screening in clinical practice, many pathogenic genes related to HLDs have been found.It is particularly important to clarify the pathogenesis and clinical phenotypic changes of HLDs.
2.Item Screening of the Clinical Aided Decision Scheme for Stroke Simultaneous Treatment of Disease,Pulse and Syndrome Based on Delphi Method
Mengmeng DING ; Qiaosheng REN ; Jian CHEN ; Dahe QI ; Kexin WANG ; Yuanyuan CHEN ; Lingbo KONG ; Jingling CHANG
Chinese Journal of Information on Traditional Chinese Medicine 2024;31(2):149-153
Objective To screen items of the Clinical Aided Decision Scheme for Stroke Simultaneous Treatment of Disease,Pulse and Syndrome;To provide reference for the formulation and improvement of the scheme.Methods The Delphi method was used to distribute two rounds of questionnaires to 60 experts in cerebropathy or neurology across the country.Statistical analysis was performed on the questionnaire results of the scheme's items,including the disease names,etiology and pathogenesis,syndrome characteristics,rules and regulations,representative prescriptions,acupuncture and other therapies,and preventive care.Results Totally 42 and 50 valid questionnaires were collected.The experts reached the consensus for the importance of etiology and pathogenesis,rules and regulations,acupuncture and other therapies,and preventive care.In the section on syndrome characteristics,items with low relevance or causing ambiguity were removed.Items that were no longer used in modern times and different prescriptions with the same name were removed from the representative prescriptions.The names of syndromes,rules and regulations were unified.Conclusion The experts generally reached the consensus for the importance of the Clinical Aided Decision Scheme for Stroke Simultaneous Treatment of Disease,Pulse and Syndrome.However,there are still some limitations that require further study and discussion.
3.Mechanisms of ionizing radiation-induced pyroptosis in human intestinal epithelial cells
Qiong WANG ; Jian HONG ; Jin GUO ; Junzhao DUAN ; Kexin DING ; Fumin TAI ; Xiaofei ZHENG ; Changhui GE
Military Medical Sciences 2024;48(4):241-250
Objective To investigate the mechanism underlying gasdermin E(GSDME)-mediated pyroptosis in radiation-induced intestinal injury and to find out whether gasdermin(GSDM)family members regulate pyroptosis through similar signaling pathways.Methods Human normal colon epithelial cells(NCM460)and human colon cancer cells(HT-29)were exposed to radiation of different doses and durations before pyroptosis indicators were evaluated by observing pyroptotic bubbles,cell survival,and the cleavage of pyroptosis execution proteins.HT-29 cells overexpressing GSDME were subjected to radiation,followed by enrichment analysis of pyroptosis-related differentially expressed genes using RNA-seq.Results Radiation induced substantial pyroptosis in NCM460 cells.Overexpression of GSDME in HT-29 cells resulted in substantial radiation-induced pyroptosis.The pyroptosis state of human intestinal cells was simulated in the HT-29 model cell line.Overexpressions of GSDME-N and GSDMD-N resulted in the expression of more than 50% of the differentially expressed genes in the pyroptosis state.Sequencing analysis showed that the genes in the pyroptosis state were mainly overrepresented in immune response,inflammatory response,and Rapl signaling pathway.Conclusion GSDME activation can mediate radiation-induced pyroptosis by producing GSDME-N fragments.GSDM family members participate in pyroptosis in a similar mode of regulation.Furthermore,radiation-induced activation of GSDME/D may regulate pyroptosis through immune response,inflammatory response,and Rap1 signaling pathway.
4.Glutathione peroxidase 3-modified mesenchymal stem cells attenuate radiation-induced lung injury by reducing oxidative damage
Rui ZHAI ; Fumin TAI ; Kexin DING ; Changhui GE ; Xiaofei ZHENG ; Hanjiang FU
Military Medical Sciences 2024;48(7):487-494
Objective To investigate the protective effect and mechanism of glutathione peroxidase 3-(GPx3)modified mesenchymal stem cells(MSC)against radiation-induced lung injury(RILI).Methods GPx3-modified MSCs were injected into the tail vein of mice whose lungs were irradiated with 20 Gy.Lung tissues were collected and sections were stained to observe pathological changes.The expression levels of inflammation-related factors were detected by real time quantitative PCR(qPCR),while the levels of malondialdehyde(MDA),H2O2,and 8-hydroxyguanine(8-OHG)were detected via biochemical experiments.Additionally,RNA damage was assessed by reverse transcription blocking combining with double primer PCR.Results GPx3-modified MSCs significantly improved the pathological damage in post-radiation lung tissues and inhibited the fibrosis process and inflammatory response.GPx3-modified MSCs were able to scavenge reactive oxygen species(ROS)more effectively,resulting in a reduction of lipid peroxidation products such as MDA and oxidative damage to RNA formation of 8-OHG.Conclusion By decreasing ROS accumulation,GPx3-modified MSCs can potentially reduce oxidative damage and attenuate RILI.GPx3-modified MSCs can improve the therapeutic efficacy against RILI.
5.In vitro study on flavonoid NO donor nanoparticles promoting osteogenic differentiation of PDLSCs by regulating macrophage polarization
Kexin DING ; Jinxin YANG ; Jie MOU ; Zhe SUN ; Yawen CUI ; Zongxiang LIU
STOMATOLOGY 2024;44(11):806-814
Objective As a signaling molecule,NO regulates key physiological processes and is closely related to periodontitis.To investigate the effect of flavonoid NO donor composite nanoparticles(G10@HAP/MSN@ZnO@COS)on osteogenic differentiation of periodontal ligament stem cells(PDLSCs)by regulating macrophage polarization.Methods The novel NO donor drug G10 was loaded on hydroxyapatite/mesoporous silicanant particles(HAP/MSN),filled with zinc oxide(ZnO),and then coated with chitosan(COS)to prepare composite nanoparticles(G10@HAP/MSN@ZnO@COS).The best concentration of G10@HAP/MSN@ZnO@COS was screened to promote cell proliferation by CCK-8 cell experiment.After the mouse mononuclear macrophages were stimulated by lipopo-lysaccharide,the mice were divided into four groups:Control group,G10 group,HAP/MSN@ZnO@COS group and G10@HAP/MSN@ZnO@COS group.Each group was cultured with fresh medium,5 μg/mL G10,5 μg/mL HAP/MSN@ZnO@COS and 5 μg/mL G10@HAP/MSN@ZnO@COS for 72 h respectively.ELISA and RT-qPCR were used to detect the expression of cytokines(TNF-α,IL-6,IL-1β,iNOS,IL-10)and mRNA expression in each group,and the phenotypic changes of M1/M2 were evaluated.The supernatant of each culture medium was used as conditioned medium to culture PDLSCs,and the osteogenic ability and cell miner-alization were evaluated by alkaline phosphatase activity test and alizarin red staining.Results CCK-8 experiment showed that G10@HAP/MSN@ZnO@COS of 5 μg/mL could significantly promote the proliferation of PDLSCs.The results of ELISA showed that compared with Control group,the expression of M1 type marker IL-1β,IL-6,TNF-α and iNOS in G10@HAP/MSN@ZnO@COS group was significantly decreased(P<0.000 1),while the expression of M2 type marker IL-10 was significantly increased(P<0.000 1).The results of RT-qPCR were consistent with those of ELISA,which showed that the expression of M1-related genes in G10@HAP/MSN@ZnO@COS group decreased significantly(P<0.01).The results of alizarin red staining and alkaline phosphatase activity test showed that the number of mineralized nodules and alkaline phosphatase activity in G10@HAP/MSN@ZnO@COS-CM group were significantly higher than those in other groups(P<0.000 1).Conclusion Composite nanoparticles(G10@HAP/MSN@ZnO@COS)can effectively inhibit the polarization of macrophages to M1 phenotype and promote it to M2 phenotypic polarization.The anti-inflammatory microenvironment regulated by G10@HAP/MSN@ZnO@COS can en-hance the osteogenic differentiation of PDLSCs.
6.Comparison of the biomechanical effects of cervical fusion surgery between using a cervical interfacet self-locking cage and a Zero-profile anterior cervical interbody fusion device
Ziyao DING ; Kexin CHEN ; Weiran SHI
Chinese Journal of Spine and Spinal Cord 2024;34(9):960-968
Objectives:To compare the biomechanical effects on the cervical spine between the insertion of a cervical interfacet self-locking cage(CILC)for anterior cervical interbody fusion and the insertion of a Zero-profile anterior cervical interbody fusion device(Zero-P)through the finite element method.Methods:Extracting the thin-layer cervical CT scan data of a 24-year-old male volunteer,and excluding any history of cervical spine trauma,surgery,cervical spondylosis,and imaging-diagnosed cervical spine deformities.Establishing a three-dimensional finite element model(blank model)of the normal lower cervical spine.The validity of the model was verified by comparing the range of motion(ROM)with those reported in previous studies.Based on this model,finite element models were constructed for single-segment posterior CILC insertion and fusion and Zero-P insertion and fusion.The surgical segment was set as the C4/5 segment,and CILC and Zero-P were implanted respectively to fuse and construct model.The lower endplate of the C7 vertebral body was fixed,and an axial load of 73.6N was applied to simulate the head's weight.A 1.0N·m torque was applied to the upper surface of the C2 vertebral body to simulate the overall movement of the C2-C7 finite element models,including flexion,extension,lateral bending,and axial rotation.The ROM of the segment and the stress changes in the adjacent segment intervertebral discs and facet joints were analyzed in all four motion directions for the blank model,CILC model,and Zero-P model.Results:The ROMs of the established three-dimensional finite element model of the lower cervical spine in all motion directions were consistent with previously published studies,therefore its validity was verified.Compared with the blank mod-el,the ROMs in all directions of the fusion segment was significantly reduced in both the CILC and Zero-P models.The ROM of the adjacent segments and the peak stress in the intervertebral discs and facet joints of the adjacent segments were higher in all motion directions compared with the blank model,with no significant difference in the degree of ROM increase between the CILC and Zero-P models.The peak stress increase in the intervertebral discs of adjacent segments in the CILC model was smaller than that in the Zero-P model.In the CILC model,the peak stress values of the C3/4 segment during flexion,extension,lateral bending,and rotation increased from pre-fixation values of 2.181,3.358,3.636,and 3.950MPa to post-fixation values of 2.532,3.881,4.463,and 4.917MPa,respectively.The peak stress values of the C5/6 segment during flexion,extension,lateral bending,and rotation increased from pre-fixation values of 1.558,3.996,3.778,and 3.660 MPa to post-fixation values of 1.864,4.131,4.183,and 4.266MPa,respectively.In the Zero-P model,the peak stress values of the C3/4 segment during flexion,extension,lateral bending,and rotation increased from preoperative values of 2.181,3.358,3.636,and 3.950MPa to 2.977,4.241,4.654,and 5.509MPa,respectively.The peak stress values of the C5/6 segment during flexion,extension,lateral bending,and rotation increased from pre-fixation values of 1.558,3.996,3.778,and 3.660MPa to post-fixation values of 2.314,5.214,4.469,and 4.739MPa,respectively.The peak stress increase in the adjacent facet joints in all motion directions was greater in the CILC model than in the Zero-P model.Conclusions:CILC insertion results in less impact on adjacent segment disc stress compared to Zero-P and provides reliable fixation,making it a suitable option for treating adjacent segment disease after cervical surgery.
7.Inhibition of Tumoral VISTA to Overcome TKI Resistance via Downregulation of the AKT/mTOR and JAK2/STAT5 Pathways in Chronic Myeloid Leukemia
Kexin AI ; Mu CHEN ; Zhao LIANG ; Xiangyang DING ; Yang GAO ; Honghao ZHANG ; Suwan WU ; Yanjie HE ; Yuhua LI
Biomolecules & Therapeutics 2024;32(5):582-600
Tyrosine kinase inhibitors (TKIs) have revolutionized the treatment landscape for chronic myeloid leukemia (CML). However, TKI resistance poses a significant challenge, leading to treatment failure and disease progression. Resistance mechanisms include both BCR::ABL1-dependent and BCR::ABL1-independent pathways. The mechanisms underlying BCR::ABL1 independence remain incompletely understood, with CML cells potentially activating alternative signaling pathways, including the AKT/mTOR and JAK2/STAT5 pathways, to compensate for the loss of BCR::ABL1 kinase activity. This study explored tumoral VISTA (encoded by VSIR) as a contributing factor to TKI resistance in CML patients and identified elevated tumoral VISTA levels as a marker of resistance and poor survival. Through in vitro and in vivo analyses, we demonstrated that VSIR knockdown and the application of NSC-622608, a novel VISTA inhibitor, significantly impeded CML cell proliferation and induced apoptosis by attenuating the AKT/ mTOR and JAK2/STAT5 pathways, which are crucial for CML cell survival independent of BCR::ABL1 kinase activity. Moreover, VSIR overexpression promoted TKI resistance in CML cells. Importantly, the synergistic effect of NSC-622608 with TKIs offers a potent therapeutic avenue against both imatinib-sensitive and imatinib-resistant CML cells, including those harboring the challenging T315I mutation. Our findings highlight the role of tumoral VISTA in mediating TKI resistance in CML, suggesting that inhibition of VISTA, particularly in combination with TKIs, is an innovative approach to enhancing treatment outcomes in CML patients, irrespective of BCR::ABL1 mutation status. This study not only identified a new pathway contributing to TKI resistance but also revealed the possibility of targeting tumoral VISTA as a means of overcoming this significant clinical challenge.
8.Progress of Rhei Radix et Rhizoma and Its Combination in Treatment of Cerebral Hemorrhage: A Review
Dahe QI ; Hua MA ; Yuanyuan CHEN ; Kexin WANG ; Mengmeng DING ; Yunlong HAO ; Ye GUO ; Lingbo KONG
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(16):237-249
Cerebral hemorrhage accounts for about 10%-15% of all strokes, and its pathogenesis is complex. Currently, the main clinical treatment is mainly medical symptomatic treatment, including the use of antihypertensive drugs, hypoglycemic drugs, and hemostatic drugs, and surgical treatment is required in some cases, but there is still a lack of effective treatment. In recent years, traditional Chinese medicine and proprietary Chinese medicine have been widely accepted for their stable efficacy, high safety, and low cost. Rhei Radix et Rhizoma is one of the most commonly used herbal medicines for the treatment of cerebral hemorrhage. This paper summarizes the relevant literature on the treatment of cerebral hemorrhage with Rhei Radix et Rhizoma and finds that its active ingredients are mainly anthraquinones, such as emodin, Rhei Radix et Rhizoma acid, and Rhei Radix et Rhizoma phenol. The herbal formulas are Da Chengqitang, Shengdi Dahuangtang, Liangxue Tongyufang, and Naoxueshu oral liquid. The effects involve protecting the blood-brain barrier, promoting hematoma absorption, reducing inflammation levels, decreasing lactic acid accumulation at the bleeding site, and increasing the expression of brain-derived neurotrophic factors. The pathways involved include aquaporin 4 (AQP4), phosphatidylinositol 3-kinase/protein kinase B (PI3K/Akt), extracellular signal-regulated kinase 1/2 (ERK1/2), Toll-like receptor 4 (TLR4), nuclear transcription factor-κB (NF-κB), nuclear factor E2-related factor 2 (Nrf2), and Wnt3a/β-linked protein pathway. This paper summarizes the progress of clinical studies and animal experiments on the treatment of cerebral hemorrhage with active ingredients of Rhei Radix et Rhizoma and herbal compounds containing Rhei Radix et Rhizoma, so as to provide a reference for the treatment protocol of cerebral hemorrhage.
9.Expanded Applications of Traditional Chinese Medicine Four Examination Techniques in Asymptomatic Spleen-Stomach Diseases
Jingwen YU ; Taicheng LU ; Meng LI ; Yuan DING ; Kexin QIN ; Shaoli WANG ; Zhen LIU
Journal of Traditional Chinese Medicine 2023;64(24):2511-2515
Asymptomatic spleen-stomach diseases refer to diseases without related symptoms and signs of abdo-minal pain, bloating, diarrhea an others in patients, but showing lesions or pathological changes discovered by modern medical techniques such as endoscopy, CT, MRI. The four examination techniques of traditional Chinese medicine (TCM) are based on symptoms and signs of patients, which are the advantage of TCM but also have certain limitations. In the context of the increasingly modernized diagnosis and treatment in TCM, it is proposed to expand the application of the four examination techniques from three aspects including microcosmic syndrome differentiation, data sharing, and artificial intelligence in asymptomatic spleen-stomach diseases, in order to achieve the goals of dynamically observing the disease process, collecting disease data in multiple dimensions, and intelligently processing disease data. This will strengthen the modern requirements of early diagnosis and treatment in TCM, and highlight the advantages of TCM in “treating disease before it arises and treating the symptoms beforehand”.
10.Chuanxiong Rhizoma extracts prevent cholestatic liver injury by targeting H3K9ac-mediated and cholangiocyte-derived secretory protein PAI-1 and FN.
Yajing LI ; Zhi MA ; Mingning DING ; Kexin JIA ; Bing XU ; Fei ZHOU ; Ranyi LUO ; Xiaoyong XUE ; Ruiyu WU ; Feng GAO ; Xiaojiaoyang LI
Chinese Journal of Natural Medicines (English Ed.) 2023;21(9):694-709
Chuanxiong Rhizoma (CX, the dried rhizome of Ligusticum wallichii Franch.), a well-known traditional Chinese medicine, is clinically used for treating cardiovascular, cerebrovascular and hepatobiliary diseases. Cholestatic liver damage is one of the chronic liver diseases with limited effective therapeutic strategies. Currently, little is known about the mechanism links between CX-induced anti-cholestatic action and intercellular communication between cholangiocytes and hepatic stellate cells (HSCs). The study aimed to evaluate the hepatoprotective activity of different CX extracts including the aqueous, alkaloid, phenolic acid and phthalide extracts of CX (CXAE, CXAL, CXPA and CXPHL) and investigate the intercellular communication-related mechanisms by which the most effective extracts work on cholestatic liver injury. The active compounds of different CX extracts were identified by UPLC-MS/MS. A cholestatic liver injury mouse model induced by bile duct ligation (BDL), and transforming growth factor-β (TGF-β)-treated human intrahepatic biliary epithelial cholangiocytes (HIBECs) and HSC cell line (LX-2 cells) were used for in vivo and in vitro studies. Histological and other biological techniques were also applied. The results indicated that CXAE, CXAL and CXPHL significantly reduced ductular reaction (DR) and improved liver fibrosis in the BDL mice. Meanwhile, both CXAE and CXPHL suppressed DR in injured HIBECs and reduced collagen contraction force and the expression of fibrosis biomarkers in LX-2 cells treated with TGF-β. CXPHL suppressed the transcription and transfer of plasminogen activator inhibitor-1 (PAI-1) and fibronectin (FN) from the 'DR-like' cholangiocytes to activated HSCs. Mechanistically, the inhibition of PAI-1 and FN by CXPHL was attributed to the untight combination of the acetyltransferase KAT2A and SMAD3, followdd by the suppression of histone 3 lysine 9 acetylation (H3K9ac)-mediated transcription in cholangiocytes. In conclusion, CXPHL exerts stronger anti-cholestatic activity in vivo and in vitro than other CX extracts, and its protective effect on the intracellular communication between cholangiocytes and HSCs is achieved by reducing KAT2A/H3K9ac-mediated transcription and release of PAI-1 and FN.

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