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  1. Article: Recent advances in senescence-associated secretory phenotype and osteoporosis.

    Fan, Haonan / Qiao, Zhi / Li, Jitian / Shang, Guowei / Shang, Chunfeng / Chen, Songfeng / Leng, Zikuan / Su, Huifang / Kou, Hongwei / Liu, Hongjian

    Heliyon

    2024  Volume 10, Issue 4, Page(s) e25538

    Abstract: The worldwide elderly population is on the rise, and aging is a major osteoporosis risk factor. Senescent cells accumulation can have a detrimental effect the body as we age. The senescence-associated secretory phenotype (SASP), an essential cellular ... ...

    Abstract The worldwide elderly population is on the rise, and aging is a major osteoporosis risk factor. Senescent cells accumulation can have a detrimental effect the body as we age. The senescence-associated secretory phenotype (SASP), an essential cellular senescence hallmark, is an important mechanism connecting cellular senescence to osteoporosis. This review describes in detail the characteristics of SASPs and their regulatory agencies, and shed fresh light on how SASPs from different senescent cells contribute to osteoporosis development. Furthermore, we summarized various innovative therapy techniques that target SASPs to lower the burden of osteoporosis in the elderly and discussed the potential challenges of SASPs-based therapy for osteoporosis as a new clinical trial.
    Language English
    Publishing date 2024-02-08
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2024.e25538
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Interface Fixation Using Absorbable Screws versus Plate Fixation in Anterior Cervical Corpectomy and Fusion for Two-Level Cervical Spondylotic Myelopathy.

    Qiu, Xiaowen / Zhao, Bo / He, Xijing / Zhao, Chen / Leng, Zikuan

    Medical science monitor : international medical journal of experimental and clinical research

    2020  Volume 26, Page(s) e921507

    Abstract: BACKGROUND We compared the clinical and radiographic outcomes between interface fixation using absorbable screws and plate fixation in anterior cervical corpectomy and fusion (ACCF) to evaluate the effectiveness of these 2 fixation methods for the ... ...

    Abstract BACKGROUND We compared the clinical and radiographic outcomes between interface fixation using absorbable screws and plate fixation in anterior cervical corpectomy and fusion (ACCF) to evaluate the effectiveness of these 2 fixation methods for the treatment of 2-level cervical spondylotic myelopathy (CSM). MATERIAL AND METHODS From January 2014 to December 2016, a total of 220 patients who received 2-level ACCF were retrospectively collected. Among them, 108 patients were treated with interface fixation using absorbable screws (Group A) and 112 patients underwent plate fixation (Group B). Japanese Orthopedic Association (JOA) score and Neck Disability Index (NDI) score were employed to compare the clinical improvement. Operative time, blood loss, surgical cost, cervical lordosis, complications, and fusion rate were also evaluated. RESULTS The average follow-up time were 35.2±4.5 months in Group A and 35.9±3.9 months in Group B. There was no difference in operative time and blood loss for both groups. The JOA scores and NDI scores were similar in each follow-up (p>0.05 in all). Group A cost an average of 30% less than Group B for the operation. Both groups achieved 100% in the fusion rate with the same conditions in cervical lordosis. Group A (5/108) had a significantly lower complication rate than Group B (17/112) (p<0.05). CONCLUSIONS ACCF with interface fixation using absorbable screws achieved similar clinical outcomes compared to ACCF with plate fixation for 2-level CSM. Moreover, the interface fixation using absorbable screws presented far fewer complications and cost less for the operation.
    MeSH term(s) Bone Plates ; Bone Screws ; Cervical Vertebrae/diagnostic imaging ; Cervical Vertebrae/surgery ; Diskectomy/instrumentation ; Diskectomy/methods ; Female ; Humans ; Intervertebral Disc Degeneration/diagnostic imaging ; Intervertebral Disc Degeneration/surgery ; Male ; Middle Aged ; Radiography ; Spinal Fusion/instrumentation ; Spinal Fusion/methods ; Spondylosis/diagnostic imaging ; Spondylosis/surgery ; Vertebroplasty/instrumentation ; Vertebroplasty/methods
    Language English
    Publishing date 2020-03-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1439041-3
    ISSN 1643-3750 ; 1234-1010
    ISSN (online) 1643-3750
    ISSN 1234-1010
    DOI 10.12659/MSM.921507
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Novel Insights into the Stemness and Immune Privilege of Mesenchymal Stem Cells from Human Wharton Jelly by Single-Cell RNA Sequencing.

    Leng, Zikuan / Li, Longyu / Zhou, Xiang / Dong, Guangyao / Chen, Songfeng / Shang, Guowei / Kou, Hongwei / Yang, Bo / Liu, Hongjian

    Medical science monitor : international medical journal of experimental and clinical research

    2022  Volume 28, Page(s) e934660

    Abstract: BACKGROUND Fundamental and clinical interest in mesenchymal stem cells (MSCs) has risen dramatically over the past 3 decades. The immunomodulatory and differentiation abilities are the main mechanisms in vitro and in vivo. However, increasing evidence ... ...

    Abstract BACKGROUND Fundamental and clinical interest in mesenchymal stem cells (MSCs) has risen dramatically over the past 3 decades. The immunomodulatory and differentiation abilities are the main mechanisms in vitro and in vivo. However, increasing evidence casts doubt on the stemness and immunogenicity of MSCs. MATERIAL AND METHODS We conducted a high-throughput 10x RNA sequencing and Smart-seq2 scRNA-seq analysis to reveal gene expression of Wharton jelly MSCs (WJ-MSCs) at a single-cell level. Multipotent differentiation, subpopulations, marker genes, human leucocyte antigen (HLA) gene expression, and cell cluster trajectory analysis were evaluated. RESULTS The WJ-MSCs had considerable heterogeneity between cells in terms of gene expression. They highly, partially, and hardly expressed genes related to mesodermal differentiation, endodermal differentiation, and ectodermal differentiation, respectively. Some cells seem to be bipotent or unipotent stem cells. Further, Monocle and cell cluster trajectory analysis demonstrated that 1 of the 3 divided clusters performed as stem cells, accounting for 12.6% of the population. The marker genes for a stem cell cluster were CRIM1, GLS, PLOD2, NEXN, ACTR2, FN1, MBNL1, LMOD1, COL3A1, NCL, SEC62, EPRS, COL5A2, COL8A1, and VCAN. In addition, the MSCs also highly, partially, and hardly expressed HLA-I antigen genes, HLA-II genes, and the HLA-G gene, respectively, indicating that MSCs probably have immunogenicity. A Kyoto Encyclopedia of Genes and Genomes pathway analysis of the 3 clusters demonstrated that they were mainly connected with viral infectious diseases, cancer, and endocrine and metabolic disorders. The most expressed transcription factors were zf-C2H2, HMG/HMGY, and Homeobox. CONCLUSIONS We found that only a subpopulation of WJ-MSCs are real stem cells and WJ-MSCs probably do not have immune privilege.
    MeSH term(s) Cell Differentiation ; Cell Proliferation ; Cells, Cultured ; Humans ; Immune Privilege ; Mesenchymal Stem Cells/cytology ; Mesenchymal Stem Cells/immunology ; RNA/genetics ; Sequence Analysis, RNA ; Transcription Factors ; Umbilical Cord/cytology ; Umbilical Cord/immunology ; Wharton Jelly/cytology ; Wharton Jelly/immunology ; Wharton Jelly/metabolism
    Chemical Substances Transcription Factors ; RNA (63231-63-0)
    Language English
    Publishing date 2022-02-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1439041-3
    ISSN 1643-3750 ; 1234-1010
    ISSN (online) 1643-3750
    ISSN 1234-1010
    DOI 10.12659/MSM.934660
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A survey of 434 clinical trials about coronavirus disease 2019 in China.

    Leng, Zikuan / Yin, Dongfei / Zhao, Zhe / Yan, Miaoheng / Yang, Yanlei / He, Xijing / Zhao, Robert Chunhua / Liu, Hongjian

    Journal of medical virology

    2020  Volume 92, Issue 10, Page(s) 1715–1717

    MeSH term(s) COVID-19/drug therapy ; COVID-19/epidemiology ; COVID-19/therapy ; China ; Clinical Trials as Topic ; Humans ; Medicine, Chinese Traditional ; Observational Studies as Topic ; Registries
    Keywords covid19
    Language English
    Publishing date 2020-03-27
    Publishing country United States
    Document type Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 752392-0
    ISSN 1096-9071 ; 0146-6615
    ISSN (online) 1096-9071
    ISSN 0146-6615
    DOI 10.1002/jmv.25779
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: A supplementary study from China: the use of pain medications after operative treatment of an ankle fracture.

    Leng, Zikuan / He, Xijing

    Injury

    2013  Volume 44, Issue 11, Page(s) 1656–1657

    MeSH term(s) Analgesics, Opioid/administration & dosage ; Ankle Injuries/drug therapy ; Female ; Fractures, Bone/drug therapy ; Humans ; Male ; Pain, Postoperative/drug therapy ; Patient Satisfaction/statistics & numerical data
    Chemical Substances Analgesics, Opioid
    Language English
    Publishing date 2013-11
    Publishing country Netherlands
    Document type Comment ; Letter
    ZDB-ID 218778-4
    ISSN 1879-0267 ; 0020-1383
    ISSN (online) 1879-0267
    ISSN 0020-1383
    DOI 10.1016/j.injury.2013.01.037
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: A survey of 434 clinical trials about coronavirus disease 2019 in China

    Leng, Zikuan / Yin, Dongfei / Zhao, Zhe / Yan, Miaoheng / Yang, Yanlei / He, Xijing / Zhao, Robert Chunhua / Liu, Hongjian

    J. med. virol

    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #17549
    Database COVID19

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  7. Article ; Online: A patient with Turner syndrome received the percutaneous vertebroplasty seven times: a case report and literature review.

    Li, Longyu / Shi, Yifang / Zhao, Nan / Liu, Zhengpei / Zhao, Zhe / Song, Zongmian / Zheng, Sailei / Yan, Miaoheng / Leng, Zikuan / Chen, Songfeng / Shang, Guowei / Kou, Hongwei / Liu, Hongjian

    European journal of medical research

    2021  Volume 26, Issue 1, Page(s) 139

    Abstract: Background: Turner syndrome (TS) is characterized as the complete or partial absence of one X chromosome and is an extremely rare disease affecting approximately 1:2500 live female births. Though the prevalence of osteoporosis among women with TS is ... ...

    Abstract Background: Turner syndrome (TS) is characterized as the complete or partial absence of one X chromosome and is an extremely rare disease affecting approximately 1:2500 live female births. Though the prevalence of osteoporosis among women with TS is estimated to be around 55-64% and they suffer more frequently from fractures than normal, few reports concerning TS patients with osteoporosis are able to be seen due to tiny number of patients.
    Case presentation: Here, we report a rare case of TS with osteoporosis, who has undergone percutaneous vertebroplasty (PVP) seven times because of several vertebral compression fractures (VCFs). G-banded karyotype analysis was performed and the result was 45,X[43]/47,XXX[17], indicating that the patient was a mosaicism of TS karyotype and Trisomy X syndrome karyotype. TS is the underlying cause of low level of estrogen for this patient. The interaction of aging, estrogen deficiency and intestinal dysbacteriosis leads to her severe osteoporosis and multi-segmental VCFs. The aim of this report is to provide recommendations regarding the management of TS patients with osteoporosis by reviewing the clinical presentation of TS, the influence of estrogen deficiency in osteoporosis, etc. CONCLUSIONS: Early diagnosis and hormone replacement treatment are essential for TS patients to prevent osteoporosis and reduce the risk of fractures. This is a rare case report describing TS patient with severe osteoporosis and VCFs.
    MeSH term(s) Aged ; Female ; Fractures, Compression/diagnosis ; Fractures, Compression/etiology ; Humans ; Osteoporotic Fractures/diagnosis ; Osteoporotic Fractures/etiology ; Osteoporotic Fractures/surgery ; Radiography ; Reoperation/statistics & numerical data ; Thoracic Vertebrae/diagnostic imaging ; Thoracic Vertebrae/injuries ; Thoracic Vertebrae/surgery ; Turner Syndrome/complications ; Turner Syndrome/diagnosis ; Turner Syndrome/genetics ; Vertebroplasty/adverse effects
    Language English
    Publishing date 2021-12-07
    Publishing country England
    Document type Case Reports ; Journal Article ; Review
    ZDB-ID 1329381-3
    ISSN 2047-783X ; 0949-2321
    ISSN (online) 2047-783X
    ISSN 0949-2321
    DOI 10.1186/s40001-021-00617-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: A patient with Turner syndrome received the percutaneous vertebroplasty seven times

    Longyu Li / Yifang Shi / Nan Zhao / Zhengpei Liu / Zhe Zhao / Zongmian Song / Sailei Zheng / Miaoheng Yan / Zikuan Leng / Songfeng Chen / Guowei Shang / Hongwei Kou / Hongjian Liu

    European Journal of Medical Research, Vol 26, Iss 1, Pp 1-

    a case report and literature review

    2021  Volume 6

    Abstract: Abstract Background Turner syndrome (TS) is characterized as the complete or partial absence of one X chromosome and is an extremely rare disease affecting approximately 1:2500 live female births. Though the prevalence of osteoporosis among women with TS ...

    Abstract Abstract Background Turner syndrome (TS) is characterized as the complete or partial absence of one X chromosome and is an extremely rare disease affecting approximately 1:2500 live female births. Though the prevalence of osteoporosis among women with TS is estimated to be around 55–64% and they suffer more frequently from fractures than normal, few reports concerning TS patients with osteoporosis are able to be seen due to tiny number of patients. Case presentation Here, we report a rare case of TS with osteoporosis, who has undergone percutaneous vertebroplasty (PVP) seven times because of several vertebral compression fractures (VCFs). G-banded karyotype analysis was performed and the result was 45,X[43]/47,XXX[17], indicating that the patient was a mosaicism of TS karyotype and Trisomy X syndrome karyotype. TS is the underlying cause of low level of estrogen for this patient. The interaction of aging, estrogen deficiency and intestinal dysbacteriosis leads to her severe osteoporosis and multi-segmental VCFs. The aim of this report is to provide recommendations regarding the management of TS patients with osteoporosis by reviewing the clinical presentation of TS, the influence of estrogen deficiency in osteoporosis, etc. Conclusions Early diagnosis and hormone replacement treatment are essential for TS patients to prevent osteoporosis and reduce the risk of fractures. This is a rare case report describing TS patient with severe osteoporosis and VCFs.
    Keywords Osteoporosis ; Turner syndrome ; Percutaneous vertebroplasty ; Vertebral compression fractures ; Estrogen ; Gut microbiome ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury.

    Gao, Zhengchao / Zhao, Yingjie / He, Xijing / Leng, Zikuan / Zhou, Xiaoqian / Song, Hui / Wang, Rui / Gao, Zhongyang / Wang, Yiqun / Liu, Jiantao / Niu, Binbin / Li, Haopeng / Ouyang, Pengrong / Chang, Su'e

    Cell transplantation

    2020  Volume 29, Page(s) 963689720916173

    Abstract: MicroRNAs (miRNAs) function as gene expression switches, and participate in diverse pathophysiological processes of spinal cord injury (SCI). Olfactory ensheathing cells (OECs) can alleviate pathological injury and facilitate functional recovery after ... ...

    Abstract MicroRNAs (miRNAs) function as gene expression switches, and participate in diverse pathophysiological processes of spinal cord injury (SCI). Olfactory ensheathing cells (OECs) can alleviate pathological injury and facilitate functional recovery after SCI. However, the mechanisms by which OECs restore function are not well understood. This study aims to determine whether silencing miR-199a-5p would enhance the beneficial effects of the OECs. In this study, we measured miR-199a-5p levels in rat spinal cords with and without injury, with and without OEC transplants. Then, we transfected OECs with the sh-miR-199a-5p lentiviral vector to reduce miR-199a-5p expression and determined the effects of these OECs in SCI rats by Basso-Beattie-Bresnahan (BBB) locomotor scores, diffusion tensor imaging (DTI), and histological methods. We used western blotting to measure protein levels of Slit1, Robo2, and srGAP2. Finally, we used the dual-luciferase reporter assay to assess the relationship between miR-199-5p and Slit1, Robo2, and srGAP2 expression. We found that SCI significantly increased miR-199a-5p levels (
    MeSH term(s) Animals ; Cell Transplantation/methods ; Cell- and Tissue-Based Therapy/methods ; Cells, Cultured ; Disease Models, Animal ; Male ; MicroRNAs/genetics ; MicroRNAs/pharmacology ; Olfactory Bulb/drug effects ; Olfactory Bulb/transplantation ; Rats, Sprague-Dawley ; Receptors, Immunologic/metabolism ; Recovery of Function/drug effects ; Recovery of Function/physiology ; Spinal Cord/pathology ; Spinal Cord/surgery ; Spinal Cord Injuries/therapy
    Chemical Substances MIRN199 microRNA, rat ; MicroRNAs ; Receptors, Immunologic
    Language English
    Publishing date 2020-04-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1135816-6
    ISSN 1555-3892 ; 0963-6897
    ISSN (online) 1555-3892
    ISSN 0963-6897
    DOI 10.1177/0963689720916173
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury

    Zhengchao Gao / Yingjie Zhao / Xijing He / Zikuan Leng / Xiaoqian Zhou / Hui Song / Rui Wang / Zhongyang Gao / Yiqun Wang / Jiantao Liu / Binbin Niu / Haopeng Li / Pengrong Ouyang / Su’e Chang

    Cell Transplantation, Vol

    2020  Volume 29

    Abstract: MicroRNAs (miRNAs) function as gene expression switches, and participate in diverse pathophysiological processes of spinal cord injury (SCI). Olfactory ensheathing cells (OECs) can alleviate pathological injury and facilitate functional recovery after ... ...

    Abstract MicroRNAs (miRNAs) function as gene expression switches, and participate in diverse pathophysiological processes of spinal cord injury (SCI). Olfactory ensheathing cells (OECs) can alleviate pathological injury and facilitate functional recovery after SCI. However, the mechanisms by which OECs restore function are not well understood. This study aims to determine whether silencing miR-199a-5p would enhance the beneficial effects of the OECs. In this study, we measured miR-199a-5p levels in rat spinal cords with and without injury, with and without OEC transplants. Then, we transfected OECs with the sh-miR-199a-5p lentiviral vector to reduce miR-199a-5p expression and determined the effects of these OECs in SCI rats by Basso–Beattie–Bresnahan (BBB) locomotor scores, diffusion tensor imaging (DTI), and histological methods. We used western blotting to measure protein levels of Slit1, Robo2, and srGAP2. Finally, we used the dual-luciferase reporter assay to assess the relationship between miR-199-5p and Slit1, Robo2, and srGAP2 expression. We found that SCI significantly increased miR-199a-5p levels ( P < 0.05), and OEC transplants significantly reduced miR-199a-5p expression ( P < 0.05). Knockdown of miR-199a-5p in OECs had a better therapeutic effect on SCI rats, indicated by higher BBB scores and fractional anisotropy values on DTI, as well as histological findings. Reducing miR-199a-5p levels in transplanted OECs markedly increased spinal cord protein levels of Slit1, Robo2, and srGAP2. Our results demonstrated that transplantation of sh-miR-199a-5p-modified OECs promoted functional recovery in SCI rats, suggesting that miR-199a-5p knockdown was more beneficial to the therapeutic effects of OEC transplants. These findings provided new insights into miRNAs-mediated therapeutic mechanisms of OECs, which helps us to develop therapeutic strategies based on miRNAs and optimize cell therapy for SCI.
    Keywords Medicine ; R
    Subject code 500
    Language English
    Publishing date 2020-04-01T00:00:00Z
    Publisher SAGE Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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