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Liu BJ, Guan YY, Qiao LX, Zhang JM, Li AJ, Yang PX, Gao YX, Chen DX, Wang CX, Wu J. The mechanism and experimental verification of Ixeris sonchifolia promoting apoptosis of hepatocellular carcinoma based on network pharmacology: Ixeris sonchifolia Induces Hepatocellular Carcinoma Apoptosis via the PI3K/AKT Pathway. J Ethnopharmacol 2024; 327:117994. [PMID: 38437889 DOI: 10.1016/j.jep.2024.117994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 02/22/2024] [Accepted: 02/26/2024] [Indexed: 03/06/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ixeris sonchifolia alias Kudiezi, it was named Ixeris sonchifolia (Bunge) Hance, a synonym for Crepidiastrum sonchifolium (Bunge) Pak & Kawano in the https://www.iplant.cn/. And it was first published in J. Linn. Soc., Bot. 13: 108 (1873), which was named Ixeris sonchifolia (Maxim.) Hance in the MPNS (http://mpns.kew.org). As a widely distributed medicinal and edible wild plant, it possesses unique bitter-cold characteristics and constituents with various pharmacological activities. Its main antitumor substances, same as artemisinin and paclitaxel, are classified as terpenoids and have become research foci in recent years. However, its specific biological activity and role in antitumor treatment remain largely unclear. AIM OF THE STUDY This study aimed to elucidate the molecular targets and potential mechanisms of hepatocellular carcinoma apoptosis induced by Ixeris sonchifolia. MATERIALS AND METHODS We used network pharmacology methods to analyze and screen the active ingredients and possible underlying mechanisms of Ixeris sonchifolia in treating liver cancer and employed integrative time- and dose-dependent toxicity, transcriptomics, and molecular biology approaches to comprehensively verify the function of Ixeris sonchifolia extract (IsE) in human hepatoblastoma cell (HepG2) apoptosis and its potential mechanism. RESULTS A total of 169 common targets were screened by network pharmacology, and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis showed that IsE inhibited HepG2 cell activity in a time- and dose-dependent manner. Western blot analysis confirmed that IsE promoted HepG2 cell apoptosis by inhibiting the PI3K/AKT signaling pathway and that the PI3K/AKT inhibitor LY294002 also substantially enhanced IsE-induced apoptosis. The PI3K/AKT signaling pathway exhibited significant differences compared to that in the control group. CONCLUSION Combining network pharmacology with experimental verification, IsE inhibited mitochondrial function and the PI3K/AKT pathway while inducing hepatoma cell apoptosis. IsE may have promising potential for liver cancer treatment and chemoprevention.
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Affiliation(s)
- Bao-Jun Liu
- Department of Head, Neck and Genitourinary Oncology, Harbin Medical University Cancer Hospital, Heilongjiang, 150081, China; Department of Oncology, The Second Affiliated Hospital of Shandong First Medical University, Shandong, 271000, China
| | - Yuan-Yue Guan
- Department of Beijing Institute of Hepatology, Beijing You an Hospital, Capital Medical University, Beijing, 100069, China
| | - Lu-Xin Qiao
- Department of Beijing Institute of Hepatology, Beijing You an Hospital, Capital Medical University, Beijing, 100069, China
| | - Ji-Mei Zhang
- School of Pharmacy, Shandong First Medical University, Shandong, 271000, China
| | - Ai-Ju Li
- Department of Oncology, The Second Affiliated Hospital of Shandong First Medical University, Shandong, 271000, China
| | - Peng-Xiang Yang
- Department of Beijing Institute of Hepatology, Beijing You an Hospital, Capital Medical University, Beijing, 100069, China
| | - Yu-Xue Gao
- Department of Beijing Institute of Hepatology, Beijing You an Hospital, Capital Medical University, Beijing, 100069, China
| | - De-Xi Chen
- Department of Beijing Institute of Hepatology, Beijing You an Hospital, Capital Medical University, Beijing, 100069, China.
| | - Chun-Xiao Wang
- Department of Pharmacy, The Second Affiliated Hospital of Shandong First Medical University, Shandong, 271000, China.
| | - Jin Wu
- Department of Head, Neck and Genitourinary Oncology, Harbin Medical University Cancer Hospital, Heilongjiang, 150081, China.
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Gao YX, Wang LF, Ba T, Zou XF, Cao SJ, Li JL, Li F, Zhou B. [Research advances of natural biomaterials in promoting wound repair]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:481-486. [PMID: 37805759 DOI: 10.3760/cma.j.cn501225-20220630-00276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
Acute and chronic wounds seriously threaten patients' life health and quality of life, therefore, wound repair has become a hot topic of research for scholars at home and abroad in recent years. With the development of material science and tissue engineering, more and more biomaterials prepared from natural ingredients were used in basic research and clinical treatment of wound repair. Such biomaterials can be used as templates for wound tissue regeneration to induce autologous cell adhesion and migration, and promote the deposition of extracellular matrix, which have broad clinical application prospects. This paper reviews the characteristics and application advance of natural biomaterials which are popular in the field of wound repair, aiming to provide ideas for the research and development of new wound dressing and tissue engineering skin.
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Affiliation(s)
- Y X Gao
- Department of Burns, Inner Mongolia Baotou Steel Hospital, Baotou 014010, China
| | - L F Wang
- Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - T Ba
- Department of Burns, Inner Mongolia Baotou Steel Hospital, Baotou 014010, China
| | - X F Zou
- Department of Burns and Plastic Surgery, Air Force Specialty Medical Center, Air Force Medical University, Beijing 100142, China
| | - S J Cao
- Department of Burns, Inner Mongolia Baotou Steel Hospital, Baotou 014010, China
| | - J L Li
- Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - F Li
- Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - B Zhou
- Department of Burns, Inner Mongolia Baotou Steel Hospital, Baotou 014010, China
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Gao YX, Ning QQ, Yang PX, Guan YY, Liu PX, Liu ML, Qiao LX, Guo XH, Yang TW, Chen DX. Recent advances in recurrent hepatocellular carcinoma therapy. World J Hepatol 2023; 15:460-476. [PMID: 37206651 PMCID: PMC10190692 DOI: 10.4254/wjh.v15.i4.460] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/20/2022] [Accepted: 03/24/2023] [Indexed: 04/20/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the most prevalent form of primary liver cancer, accounting for 75%-85% of cases. Although treatments are given to cure early-stage HCC, up to 50%-70% of individuals may experience a relapse of the illness in the liver after 5 years. Research on the fundamental treatment modalities for recurrent HCC is moving significantly further. The precise selection of individuals for therapy strategies with established survival advantages is crucial to ensuring better outcomes. These strategies aim to minimize substantial morbidity, support good life quality, and enhance survival for patients with recurrent HCC. For individuals with recurring HCC after curative treatment, no approved therapeutic regimen is currently available. A recent study presented novel approaches, like immunotherapy and antiviral medication, to improve the prognosis of patients with recurring HCC with the apparent lack of data to guide the clinical treatment. The data supporting several neoadjuvant and adjuvant therapies for patients with recurring HCC are outlined in this review. We also discuss the potential for future clinical and translational investigations.
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Affiliation(s)
- Yu-Xue Gao
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Qi-Qi Ning
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Peng-Xiang Yang
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Yuan-Yue Guan
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Peng-Xiang Liu
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Meng-Lu Liu
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Lu-Xin Qiao
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Xiang-Hua Guo
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
| | - Tong-Wang Yang
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Academician Workstation, Changsha Medical University, Changsha 410219, Hunan Province, China
- Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Changsha 410219, Hunan Province, China
| | - De-Xi Chen
- Beijing Institute of Hepatology, Beijing You An Hospital, Capital Medical University, Beijing 100069, China
- Beijing Precision Medicine and Transformation Engineering Technology Research Center of Hepatitis and Liver Cancer, Beijing 100069, China
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Zhou B, Gao YX, Ba T, Wang LF, Cao SJ, Li Q, Yan ZQ, Wang HY, Huang RJ. [Clinical effects of ultra-pulsed fractional carbon dioxide laser in the treatment of mild to moderate microstomia after burns]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2022; 38:816-821. [PMID: 36177585 DOI: 10.3760/cma.j.cn501225-20220620-00252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Objective: To investigate the clinical effects of ultra-pulsed fractional carbon dioxide laser (UFCL) in the treatment of mild to moderate microstomia after burns. Methods: A retrospective observational study was conducted on 19 patients with mild to moderate microstomia after burns who were admitted to Inner Mongolia Baogang Hospital from January 2018 to January 2022, including 15 males and 4 females aged (35±14) years. Patients had an average course of 71 d of microstomia, with 8 cases of moderate microstomia and 11 cases of mild microstomia. All the patients received UFCL treatment every 2-3 months until the microstomia was corrected or the treatment bottleneck was reached. The times of UFCL treatment for patients and the time interval from the last treatment to the last follow-up were recorded. Before the first treatment and at the last follow-up, the opening degree of mouth (finger measurement method), oral gap width, and the distance between the upper and lower incisors during mouth opening were recorded. Before the first treatment and at the last treatment, the new Vancouver scar scale (VSS) was used to evaluate the scar. At the last follow-up, the degree of satisfaction was evaluated by the Likert 5 scale by the patients themselves, and the satisfaction ratio was calculated; the adverse reactions such as pigmentation, blisters, infection, and persistent erythema in the treatment area were counted. Data were statistically analyzed with Mann-Whitney rank sum test or paired sample t test. Results: Patients received UFCL treatment of 3 (2, 6) times. The interval from the last treatment to the last follow-up was 26 months at most and 4 months at least. At the last follow-up, the opening degree of mouth of patients was significantly improved than that before treatment (Z=4.68, P<0.01). At the last follow-up, the oral gap width of patients was (35±6) mm, and the distance between upper and lower incisors during mouth opening was (3.2±0.4) cm, which was significantly improved compared with those before treatment (with t values of 10.73 and 18.97, respectively, P<0.01). The VSS score after the last treatment was 4.1±1.6, which was significantly better than that before treatment (t=22.96, P<0.01). At the last follow-up, the satisfaction ratio of patients with treatment was 18/19, and no pigmentation, blisters, infection, persistent erythema, and other adverse reactions of all patients in the treatment area occurred, however, one of the patients reported that the disease recurred about half a year after treatment. Conclusions: UFCL is an effective method for treating mild to moderate microstomia after burns, with which patients are highly satisfied, and it is worth of further study and promotion.
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Affiliation(s)
- B Zhou
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - Y X Gao
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - T Ba
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - L F Wang
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - S J Cao
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - Q Li
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - Z Q Yan
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - H Y Wang
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
| | - R J Huang
- Department of Burn Surgery, Inner Mongolia Baogang Hospital, Burn Medical Institute of Inner Mongolia, Baotou 014010, China
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Gao YX, Wang LF, Ba SJ, Cao JL, Li F, Li B, Zhou B. [Research advances on thymosin β4 in promoting wound healing]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2022; 38:378-384. [PMID: 35462518 DOI: 10.3760/cma.j.cn501120-20210221-00059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
With the aging of population and the development of social economy, the incidence of chronic wounds is increasing day by day, while the incidence of burns and trauma remains at a high level, making wound repair an increasingly concerned area in clinical practice. Thymosin β4 is a naturally occurring small molecule protein in vivo, which is widely distributed in a variety of body fluids and cells, especially in platelets. Thymosin β4 has biological activities of promoting angiogenesis, anti-inflammation, anti-apoptosis, and anti-fibrosis, and has many important functions in wound repair. Thymosin β4 has been observed to promote the healing of various wounds, such as burns, diabetic ulcers, pressure ulcers. This paper will review the molecular structure, mechanism of wound healing promotion, pharmacokinetics, and clinical application of thymosin β4, aiming to introduce its potential in wound treatment and the shortcomings of current researches.
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Affiliation(s)
- Y X Gao
- Department of Burns, the Third Affiliated Hospital of Inner Mongolia Medical University, Baotou 014010, China
| | - L F Wang
- Department of Burns, the Third Affiliated Hospital of Inner Mongolia Medical University, Baotou 014010, China
| | - S J Ba
- Department of Burns, the Third Affiliated Hospital of Inner Mongolia Medical University, Baotou 014010, China
| | - J L Cao
- Department of Burns, the Third Affiliated Hospital of Inner Mongolia Medical University, Baotou 014010, China
| | - F Li
- Burn Medical Institute of Inner Mongolia Autonomous Region, Baotou 014010, China
| | - B Li
- Burn Medical Institute of Inner Mongolia Autonomous Region, Baotou 014010, China
| | - Biao Zhou
- Department of Burns, the Third Affiliated Hospital of Inner Mongolia Medical University, Baotou 014010, China
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Gao YX, Zhang L, Zhou XD, Huang DM. [Effect of straight-line minimally invasive access cavity on the mechanical properties of maxillary first premolars: a finite element analysis]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:52-59. [PMID: 35012252 DOI: 10.3760/cma.j.cn112144-20210927-00441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To investigate the effects of straight-line minimally invasive access cavity on the mechanical properties of endodontically treated maxillary first premolars using finite element analysis. Methods: Micro-CT data of twenty maxillary first premolars were collected for three-dimensional reconstruction. Three access cavities, including the conventional access cavity (ConvAC), the truss access cavity (TrussAC) and the straight-line minimally invasive access cavity (SMIAC), as well as the root canal treatment procedure, were simulated in all the 20 reconstruction samples of three-dimensional models, respectively. The peak von Mises stress on the cervical area of each model, as well as the stress distribution under vertical and oblique loading circumstances, were subsequently determined by using finite element analysis. Results: In comparison to the stresses of ConvAC [buccal cervical (BC): (188.7±13.4) MPa, palatal cervical (PC): (200.9±25.7) MPa], the stresses of TrussAC [BC: (146.0±12.9) MPa, PC: (167.6±15.9) MPa] (t=9.01, P<0.001; t=4.59, P<0.001) and SMIAC [BC: (142.6±13.7) MPa, PC: (168.1±17.4) MPa] (t=9.64, P<0.001; t=3.76, P=0.004) significantly reduced the peak von Mises stress on the cervical area of the maxillary first premolars after root canal treatment. Under vertical loading conditions, SMIAC also reduced the central tendency of stresses on the occlusal surface, cervical area and root. In the case of oblique loading conditions, similar results were observed. Under both loading conditions, there was no significant difference in the peak von Mises stress on the cervical area of the maxillary first premolar between TrussAC and SMIAC groups. Conclusions: The design of SMIAC could preserve the mechanical properties of the maxillary first premolar following root canal treatment, which might have certain clinical feasibility.
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Affiliation(s)
- Y X Gao
- Deptartment of Conservative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - L Zhang
- Deptartment of Conservative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - X D Zhou
- West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - D M Huang
- Deptartment of Conservative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
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Wang WX, Fan WW, Gao YX, Dong XC, Feng XJ, Ren J. [Vincristine inhibits the proliferation of ovarian cancer cells by regulating the demethylation of RASSF2A]. Zhonghua Zhong Liu Za Zhi 2021; 43:932-938. [PMID: 34530575 DOI: 10.3760/cma.j.cn112152-20200229-00148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of vincristine on the proliferation of ovarian cancer cells by regulating RASSF2A demethylation. Methods: SKOV3 cells were infected with control (LV-NC) and RASSF2A lentivirus (LV-RASSF2A) and treated with or without vincristine. Cell counting kit-8 (CCK-8) was used to detect the activity of ovarian cancer cells (SKOV3) treated with different doses of vincristine. Colony formation assay was used to detect the proliferation of SKOV3 cells. Flow cytometry was used to detect the apoptosis of SKOV3 cells. Real time polymerase chain reaction (RT-PCR) was used to examine the mRNA expression of RASSF2A in IOSE-29 and SKOV3 cells. Western blot was used to examine the protein expression of RASSF2A in IOSE-29 and SKOV3 cells. Methylation-specific PCR was used to detect methylation and demethylation levels of RASSF2A gene in IOSE-29 and SKOV3 cells. Results: The cell viabilities of SKOV3 cell treated with 6.25 nmol/L, 12.5 nmol/L, 25 nmol/L, 50 nmol/L and 100 nmol/L vincristine were (87.19±4.49)%, (73.67±8.62)%, (66.35±6.04)%, (50.32±6.00)% and (34.92±6.11)%, respectively, lower than (100.46±4.69)% of control group (P<0.05). The half maximal inhibitory concentration of vincristine at 48 hours was 50.02 nmol/L. The proliferation abilities of SKOV3 cells in vincristine 12.5 nmol/L group, 25 nmol/L group and 50 nmol/L group were (41.70±2.21)%, (32.15±1.80)% and (23.00±2.01)%, respectively, significantly lower than (100.78±5.66)% in the control group (all P<0.05). The apoptotic rates of SKOV3 cells in vincristine 12.5 nmol/L group, 25 nmol/L group and 50 nmol/L group were (3.65±0.27)%, (5.21±0.76)% and (10.46±1.00)%, respectively, significantly higher than (2.12±0.23)% in the control group (all P<0.05). Compared with the IOSE-29 group (1.00±0.07 and 0.68±0.04), the mRNA expression (0.32±0.04) and protein expression (0.24±0.02) of RASSF2A were down-regulated in SKOV3 cells (P<0.05). Compared with the LV-NC group [(101.60±4.39)%, (100.73±3.29)%, (4.06±0.30)%], over-expression of RASSF2A down-requlated cell viability (68.92±3.94)%, inhibited proliferation (16.38±2.16)%, and promoted apoptosis (8.65±0.56)%, (P<0.05). Conclusion: Vincristine can increase RASSF2A expression and inhibit ovarian cancer cell proliferation by promoting the demethylation of RASSF2A promoter.
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Affiliation(s)
- W X Wang
- Department of Gynecology, Xinxiang Central Hospital, the Fourth Affiliated Hospital of Xinxiang Medical College, Xinxiang 453000, China
| | - W W Fan
- Department of Gynecology, Xinxiang Central Hospital, the Fourth Affiliated Hospital of Xinxiang Medical College, Xinxiang 453000, China
| | - Y X Gao
- Department of Gynecology, Xinxiang Central Hospital, the Fourth Affiliated Hospital of Xinxiang Medical College, Xinxiang 453000, China
| | - X C Dong
- Department of Gynecology, Xinxiang Central Hospital, the Fourth Affiliated Hospital of Xinxiang Medical College, Xinxiang 453000, China
| | - X J Feng
- Department of Gynecology, Henan Cancer Hospital, Zhengzhou 450003, China
| | - J Ren
- Department of Gynecology, the Affiliated Hospital of Guizhou Medical University, Guiyang 550025, China
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Zhan YW, Feng AP, Liang BW, Gao YX, Lu Y, Wang ZY, Shu YL, Zou HC. [Employment, turnover intention and the associated factors among public health graduates in China]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:910-915. [PMID: 34304431 DOI: 10.3760/cma.j.cn112150-20210104-00005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the employment situation of graduates of public health-related majors and explore the associated factors of turnover intention among public health practitioners in China. Methods: In April 2020, the convenient sampling method was used to recruit public health related graduates from 98 universities with public health-related majors from 31 provinces in China (excluding Hong Kong, Macao and Taiwan) and from Chinese Center for Disease Control and Prevention (only including working or unemployed status, no requirement for graduation years). A total of 1 322 questionnaires were collected, of which 1 165 (88.1%) were valid. Through the network questionnaire survey, the information of public health graduates' work situation, job satisfaction and turnover intention were collected. Multivariate logistic regression model was used to analyze the associated factors of turnover intention, and structural equation model was constructed to explore the correlation between turnover intention and job satisfaction. Results: The age of 1 165 graduates was (28.1±4.8) years. Among them, 719 (61.7%) were female and 856 (73.5%) graduates were engaged in public health-related work after graduation. The results of multivariate logistic regression analysis showed that compared with those over 30 years old, graduates under 30 years old had higher turnover intention (OR=2.531, 95%CI: 1.549-4.155). Compared with those with junior or no title, graduates with senior title had higher turnover intention (OR=2.310, 95%CI: 1.047-5.162). The results of structural equation model analysis showed that the four factors of job satisfaction, 'salary and welfare', 'promotion development', 'work itself', and 'internal and external environment', were negatively correlated with turnover intention. The internal and external environment had the greatest impact on turnover intention (total effect =-0.539). Conclusion: Most graduates of public health-related majors are engaged in public health-related work in China. Age, professional title and job satisfaction are the associated factors of turnover intention.
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Affiliation(s)
- Y W Zhan
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 510006, China
| | - A P Feng
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 510006, China
| | - B W Liang
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 510006, China
| | - Y X Gao
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 510006, China
| | - Y Lu
- School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Z Y Wang
- School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Y L Shu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 510006, China
| | - H C Zou
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 510006, China
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Hu XH, Meng L, Gao YX, Man SLM, Ma Y, Jin C, Wang B, Ning Y, Li LM. [Characteristics of human papillomavirus infection and abnormal cervical cytology in health check-up females in Shenzhen]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:1205-1212. [PMID: 34814532 DOI: 10.3760/cma.j.cn112338-20210106-00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Objective: To describe the characteristics of human papillomavirus infection and thinprep cytologic test (TCT) outcome in health check-up females in Shenzhen. Methods: Use cross-sectional design, collect information from data from health check-up females in Shenzhen and describe characteristics of HPV infections screening and TCT outcomes. Results: We collected the data of 75 754 females, 103 508 females and 69 964 females received HPV detection, TCT and combined detection respectively. HPV standardized infection rate was 19.89% (95%CI: 19.45%-20.33%) and showed a "U-shaped" pattern in age distribution. The most prevalent HPV genotypes were 52, 51, 16, 58 and 53. Infection rate was higher for high-risk HPV than low-risk HPV genotype. Single infection was more common than its multiple infection. In addition, 7.48% (95%CI: 7.22%-7.75%) women were TCT positive, of whom 4.58% (95%CI: 4.40%-4.76%), 2.54% (2.40%-2.69%), 0.27% (95%CI: 0.23%-0.31%) had atypical squamous cells, low-grade squamous intraepithelial lesions and high-grade squamous intraepithelial lesions, respectively. Overall and subtype HPV infection rates increased with severity of abnormal cervical cytology. The most prevalent HPV genotypes were 52, 58 and 16 in women with abnormal cervical cytology. Conclusions: HPV prevalence remains at a high level in Shenzhen. This study suggests that attention should be paid to HPV screening, especially in young, perimenopausal women and in high risk HPV genotype infection. Timely follow-up and cervical cytology screening are required for women with high-risk HPV infection or persistent infection. Future vaccination strategies should take account of prevalent HPV genotype.
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Affiliation(s)
- X H Hu
- Shenzhen Health Development Research Center, Shenzhen 518028, China
| | - L Meng
- Meinian Institute of Health, Beijing 100191, China Peking University Health Science Center Meinian Public Health Institute/Peking University Center for Public Health and Epidemic Preparedness & Response/Department of Epidemiology and Biostatistc, School of Public Health, Peking University, Beijing 100191, China
| | - Y X Gao
- Meinian Institute of Health, Beijing 100191, China Peking University Health Science Center Meinian Public Health Institute/Peking University Center for Public Health and Epidemic Preparedness & Response/Department of Epidemiology and Biostatistc, School of Public Health, Peking University, Beijing 100191, China
| | - S L M Man
- Meinian Institute of Health, Beijing 100191, China Peking University Health Science Center Meinian Public Health Institute/Peking University Center for Public Health and Epidemic Preparedness & Response/Department of Epidemiology and Biostatistc, School of Public Health, Peking University, Beijing 100191, China
| | - Y Ma
- Meinian Institute of Health, Beijing 100191, China Peking University Health Science Center Meinian Public Health Institute/Peking University Center for Public Health and Epidemic Preparedness & Response/Department of Epidemiology and Biostatistc, School of Public Health, Peking University, Beijing 100191, China
| | - C Jin
- Meinian Institute of Health, Beijing 100191, China Peking University Health Science Center Meinian Public Health Institute/Peking University Center for Public Health and Epidemic Preparedness & Response/Department of Epidemiology and Biostatistc, School of Public Health, Peking University, Beijing 100191, China
| | - B Wang
- Peking University Health Science Center Meinian Public Health Institute/Peking University Center for Public Health and Epidemic Preparedness & Response/Department of Epidemiology and Biostatistc, School of Public Health, Peking University, Beijing 100191, China
| | - Y Ning
- Meinian Institute of Health, Beijing 100191, China
| | - L M Li
- Peking University Health Science Center Meinian Public Health Institute/Peking University Center for Public Health and Epidemic Preparedness & Response/Department of Epidemiology and Biostatistc, School of Public Health, Peking University, Beijing 100191, China
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10
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Zhang DF, Xiong XL, Wang YJ, Gao YX, Ren Y, Wang Q, Shi CB. Bacillus velezensis WLYS23 strain possesses antagonistic activity against hybrid snakehead bacterial pathogens. J Appl Microbiol 2021; 131:3056-3068. [PMID: 34037300 DOI: 10.1111/jam.15162] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 05/06/2021] [Accepted: 05/19/2021] [Indexed: 11/30/2022]
Abstract
AIM The aims of this study were to screen an antagonistic probiotic for the prevention and control of bacterial diseases in snakehead fish and to evaluate the antimicrobial activities, biosafety and biocontrol effect of the antagonistic strain. METHODS AND RESULTS In this study, the WLYS23 strain exhibiting the most effective antagonistic properties against several fish pathogens was selected from the intestine of healthy snakehead fish. The strain was identified as Bacillus velezensis based on morphological, physiological and biochemical characteristics, and phylogenetic analysis. This strain showed amylase, cellulase, protease and lipase activities according to extracellular enzyme activity assays. Moreover, the cell-free extract of the WLYS23 strain exhibited strong antibacterial activity, with MICs of ≤64 μg ml-1 for most fish pathogens. Additionally, the cell-free extract was heat and pH stable, and resistant to protease, whereas their antimicrobial activities were significantly influenced by metal ions at high concentration. The WLYS23 strain and its cell-free extract were safe for snakehead and zebrafish. The disease resistance of snakehead fish was significantly increased following administration of the WLYS23 strain and its cell-free extract respectively. The complete genome of the WLYS23 strain was sequenced and found to harbour seven gene clusters encoding secondary metabolites with antimicrobial activity. CONCLUSION The WLYS23 strain possesses great potential as a biocontrol agent, which can be commercially developed to improve disease control in freshwater aquaculture. SIGNIFICANCE AND IMPACT OF THE STUDY Snakehead fish are important commercially farmed fish worldwide. However, the bacterial diseases caused by Aeromonas sp. and Nocardia seriolae in farmed snakehead fish lead to huge economic losses. Safe, economical and efficient probiotics are limited to prevent and control these diseases. Here, we provide a promising biocontrol agent with antagonistic activity against bacterial diseases of snakehead.
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Affiliation(s)
- D F Zhang
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Key Laboratory of Aquatic Animal Immune Technology, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - X L Xiong
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Key Laboratory of Aquatic Animal Immune Technology, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Y J Wang
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Key Laboratory of Aquatic Animal Immune Technology, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Y X Gao
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Key Laboratory of Aquatic Animal Immune Technology, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Y Ren
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Key Laboratory of Aquatic Animal Immune Technology, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Q Wang
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Key Laboratory of Aquatic Animal Immune Technology, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - C B Shi
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.,Key Laboratory of Aquatic Animal Immune Technology, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
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11
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Liang BW, Zhan YW, Feng AP, Gao YX, Li PY, Shu YL, Zou HC. [A survey on the willingness of college students majoring in public health to work in their majors]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:562-568. [PMID: 34814430 DOI: 10.3760/cma.j.cn112338-20200629-00898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Objective: To understand the basic qualities, practitioners will and related influences, of undergraduate, master, and doctoral students majoring in public health (hereinafter referred to as public health students), and explore the influencing factors of practitioners will. Methods: Through the online questionnaire survey, we collected information on the basic qualities of the public health students, their practitioners will and related influencing factors, and their opinions on the current state of public health in China. χ2 test and multi-factor logistic regression were used to analyze the influencing factors of public health students' willingness to engage in public health related work, and word frequency analysis was used to conduct a descriptive analysis of public health students' views on public health in China. Results: A total of 2 081 pieces of valid information were collected, of which 86.54% (1 801/2 081) of the students in the school chose to engage in public health related work in the future. For public health students, the higher the target after-tax monthly income (OR=0.345, 95%CI: 0.158-0.751), the lower the willingness to engage in public health related work in the future; Very satisfied with school employment guidance work (OR=4.072, 95%CI: 1.234-13.436) compared with very dissatisfied, the willingness to engage in public health related work in the future is higher. Conclusion: The willingness of students in public health related majors to engage in public health related majors in China is mainly affected by three factors: payment levels, employment guidance and professional post recognition. It is recommended to appropriately raise the salaries of public health related positions. Strengthening school employment guidance training and professional identity training is conducive to enhancing the willingness of public health students to engage in relevant work in their profession.
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Affiliation(s)
- B W Liang
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - Y W Zhan
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - A P Feng
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - Y X Gao
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - P Y Li
- School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Y L Shu
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - H C Zou
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
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12
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Feng AP, Zhan YW, Liang BW, Gao YX, Yuan TW, Shu YL, Zou HC. [Status quo regarding the recruit requirements of public health-related employers and training scheme for undergraduates majored in preventive medicine in colleges and universities]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:555-561. [PMID: 34814429 DOI: 10.3760/cma.j.cn112338-20200629-00896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Objective: To investigate public health-related professions' recruit requirements and understand the training scheme for preventive medicine-majored undergraduates in colleges and universities in China. Methods: An online questionnaire was adopted to collect data on the recruit requirements of public health-related professions. Information on the core courses, internship, and practical training for preventive medicine-majored undergraduates was collected through universities' official websites. Results: The employers had a high requirement for education and specific majors. Also, administration professions attached importance to comprehensive quality, while professional positions to professional skills. 47.2% (67/142) employers made Talent Introduction Programs for the next three years. 20.0% (3/15) universities offered all the core courses required by national standards. For internship and practical training, both clinical practice and professional practice's median durations were 16 and 11 weeks, respectively. Conclusion: Employers showed significant demand for public health graduates and having a high requirement for personal ability and comprehensive quality. The universities should improve the setting of core courses and strengthen students' practical ability and overall quality.
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Affiliation(s)
- A P Feng
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - Y W Zhan
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - B W Liang
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - Y X Gao
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - T W Yuan
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - Y L Shu
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - H C Zou
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
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13
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Zhao JQ, Gao YX, Wu C, Sun WL, Hu Y, Wang ZQ, Chen XX, Yu CA, Kong W, Zheng JG. [Effects of alprostadil in β-aminopropanitrile induced aortic dissection in a murine model]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:682-688. [PMID: 32847325 DOI: 10.3760/cma.j.cn112148-20190925-00592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the protective role of alprostadil on aortic dissection. Methods: 26 C57BL6 male mice were divided into control group (normal drinking water, n=13) and model group (1 g·kg-1·d-1 BAPN via drinking water, n=13). On day 14, mRNA expression of inflammatory-related genes as well as EP receptor families were detected by RT-PCR (n=6 each) and EP4 protein levels were determined by Western blot (n=7 each). Another 88 mice were divided into 3 groups: control group (n=22), model group (n=33) and treatment group (n=33). The mice in model group and treatment group were applied with BAPN (1 g·kg-1·d-1) via drinking water. The mice in treatment group received additional intraperitoneal injection with alprostadil (80 μg·kg-1·d-1) for 28 days. The mice in the control and model group received equal volume intraperitoneal injection with 0.9% saline respectively. The body weight and systolic blood pressure, the mortality and morbidity were monitored from the beginning until the designed end of the study. On day 28, the mice were sacrificed and aorta were fixed, embedded and sliced, followed by staining with HE and Victoria Blue. The distribution of EP4 was determined by immunohistochemistry in control (n=6) and model group (n=6). Furthermore, the concentration of PGE1 were tested among model (n=3) and treatment group (n=4). EP4 protein expression was determined in model group (n=7) and treatment group (n=6). Results: On day 14, mRNA expression level of MCP-1 ((2.74±1.55) vs. (1.00±0.49),<0.05) and MMP2((1.38±0.42) vs. (1.00±0.27), P<0.05) was significantly upregulated in model group compared with control group. Protein expression of EP4 receptor also increased in aorta in model group compared with control group (1.48±0.51 vs. 1.00±0.19, P<0.05). In the dissection area, the EP4 expression was also enriched compared with non-dissection area, particularly in endothelial cells and inflammatory cells on day 28. BAPN applied in drinking water (model and treatment groups) successfully induced the aortic dissection in mice, some mice died of the rupture. The elastic fibers were fractured, and the infiltrated immune cells were visible in dissected tissue. False lumen was formed. There was no dissection and death in the control group. Compared with control group, the morbidity and mortality rates were significantly increased in the model group (60.6%, 20/33, 30.3%, 10/33) and the treatment group (72.7%, 24/33, 24.2%, 8/33). The mortality and morbidity rates were similar between model and treatment groups. There is no difference in terms of SBP among three groups (P>0.05). Further study showed that after alprostadil injection, the blood concentration of PGE1 was increased in treatment group ((0.540±0.041 vs. 0.436±0.012)μmol/L, P<0.05). Besides, the EP4 receptor expression was downregulated in the treatment group compared to model group (0.60±0.30 vs. 1.00±0.20, P<0.05). Conclusion: EP4 expression is upregulated in BAPN induced aortic dissection mouse model. No protective effects are observed post alprostadil treatment in this model probably due to the reduced expression of EP4.
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Affiliation(s)
- J Q Zhao
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - Y X Gao
- Department of Cardiology, China-Japan Friendship Hospital, Beijing 100029, China
| | - C Wu
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - W L Sun
- Biomedical Experimental Research, Institute of Clinical Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | - Y Hu
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - Z Q Wang
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - X X Chen
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China
| | - C A Yu
- Department of Cardiology, China-Japan Friendship Hospital, Beijing 100029, China
| | - W Kong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - J G Zheng
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing 100029, China; Department of Cardiology, China-Japan Friendship Hospital, Beijing 100029, China
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14
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Gao YX, Yang TW, Yin JM, Yang PX, Kou BX, Chai MY, Liu XN, Chen DX. Progress and prospects of biomarkers in primary liver cancer (Review). Int J Oncol 2020; 57:54-66. [PMID: 32236573 DOI: 10.3892/ijo.2020.5035] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 02/17/2020] [Indexed: 12/24/2022] Open
Abstract
Tumor biomarkers are important in the early screening, diagnosis, therapeutic evaluation, recurrence and prognosis prediction of tumors. Primary liver cancer is one of the most common malignant tumors; it has high incidence and mortality rates and seriously endangers human health. The main pathological types of primary liver cancer include hepatocellular carcinoma (HCC), intrahepatic cholangiocarcinoma (ICC) and combined HCC‑cholangiocarcinoma (cHCC‑CC). In the present review, a systematic outline of the current biomarkers of primary liver cancer is presented, from conventional blood biomarkers, histochemical biomarkers and potential biomarkers to resistance‑associated biomarkers. The important relationships are deeply elucidated between biomarkers and diagnosis, prognosis, clinicopathological features and resistance, as well as their clinical significance, in patients with the three main types of primary liver cancer. Moreover, a summary of several important biomarker signaling pathways is provided, which is helpful for studying the biological mechanism of liver cancer. The purpose of this review is to provide help for clinical or medical researchers in the early diagnosis, differential diagnosis, prognosis and treatment of HCC.
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Affiliation(s)
- Yu-Xue Gao
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, P.R. China
| | - Tong-Wang Yang
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, P.R. China
| | - Ji-Ming Yin
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, P.R. China
| | - Peng-Xiang Yang
- Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Bu-Xin Kou
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, P.R. China
| | - Meng-Yin Chai
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, P.R. China
| | - Xiao-Ni Liu
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, P.R. China
| | - De-Xi Chen
- Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, P.R. China
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15
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Moser D, Sun SJ, Li N, Biere K, Hoerl M, Matzel S, Feuerecker M, Buchheim JI, Strewe C, Thiel CS, Gao YX, Wang CZ, Ullrich O, Long M, Choukèr A. Cells´ Flow and Immune Cell Priming under alternating g-forces in Parabolic Flight. Sci Rep 2019; 9:11276. [PMID: 31375732 PMCID: PMC6677797 DOI: 10.1038/s41598-019-47655-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 07/04/2019] [Indexed: 12/31/2022] Open
Abstract
Gravitational stress in general and microgravity (µg) in particular are regarded as major stress factors responsible for immune system dysfunction in space. To assess the effects of alternating µg and hypergravity (hyper-g) on immune cells, the attachment of peripheral blood mononuclear cells (PBMCs) to adhesion molecules under flow conditions and the antigen-induced immune activation in whole blood were investigated in parabolic flight (PF). In contrast to hyper-g (1.8 g) and control conditions (1 g), flow and rolling speed of PBMCs were moderately accelerated during µg-periods which were accompanied by a clear reduction in rolling rate. Whole blood analyses revealed a "primed" state of monocytes after PF with potentiated antigen-induced pro-inflammatory cytokine responses. At the same time, concentrations of anti-inflammatory cytokines were increased and monocytes displayed a surface molecule pattern that indicated immunosuppression. The results suggest an immunologic counterbalance to avoid disproportionate immune responses. Understanding the interrelation of immune system impairing and enhancing effects under different gravitational conditions may support the design of countermeasures to mitigate immune deficiencies in space.
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Affiliation(s)
- D Moser
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - S J Sun
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - N Li
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - K Biere
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - M Hoerl
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - S Matzel
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - M Feuerecker
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - J-I Buchheim
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - C Strewe
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - C S Thiel
- Institute of Anatomy, Faculty of Medicine, University of Zurich, Zurich, Switzerland.,Department of Machine Design, Engineering Design and Product Development (IMK), Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - Y X Gao
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - C Z Wang
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - O Ullrich
- Institute of Anatomy, Faculty of Medicine, University of Zurich, Zurich, Switzerland.,Department of Machine Design, Engineering Design and Product Development (IMK), Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - M Long
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China. .,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - A Choukèr
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany.
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16
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Zhou N, Wang P, Shi ZX, Gao YX, Yang YX, Wang YP, Xie Y, Cai DW, Guo X, Zhang L, Qiu JR, Tong LM. Au nanorod-coupled microfiber optical humidity sensors. Opt Express 2019; 27:8180-8185. [PMID: 31052640 DOI: 10.1364/oe.27.008180] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
We demonstrate a high-sensitivity relative humidity (RH) sensor taking advantage of single-band narrow plasmon resonance of a single Au nanorod coupled to a whispering gallery cavity mode of a polyacrylamide microfiber. From the resonance peak shift, the sensor could achieve a sensitivity up to 0.51 nm/% RH with a cavity size of about 2 μm. By coupling multiple Au nanorods along the microfiber axis, we demonstrate a position-dependent microfiber optical humidity sensor with a 1.5-mm spatial resolution, which can be potentially reduced to micrometer level, paving a way toward high-resolution distributed microfiber optical sensors.
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17
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Sun HW, Yu X, Gao YX, Li WW, Qi GP, Xu J. [Inhibitory Kinetics of Free Ammonia (FA) on Ammonia-oxidizing Bacteria (AOB)]. Huan Jing Ke Xue 2018; 39:4294-4301. [PMID: 30188074 DOI: 10.13227/j.hjkx.201801166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this study, a sequencing batch reactor (SBR) was operated to investigate the inhibitory kinetics of free ammonia (FA) on ammonia-oxidizing bacteria (AOB). At the beginning of the experiment, FA concentrations in influent were altered to achieve stable short-cut nitrification and enrich AOB. Nitritation sludge was then employed to study variations in the specific nitrite production rate (SNiPR) during the ammonia oxidation process of batch tests. Furthermore, a kinetic model of FA inhibition on AOB activity was fitted for statistical analysis. Results showed that SNiPR increased rapidly with increase in FA concentration (0.7 mg·L-1 ≤ FA ≤ 50.2 mg·L-1) but decreased with an increase in FA concentration (FA ≥ 50.2 mg·L-1). SNiPR was maintained at 0 g·(g·d)-1 when FA concentration was higher than 687.1 mg·L-1, implying that AOB activity was completely inhibited. Statistical analysis showed that, compared to Haldane, Edwards-1#, Edwards-2#, and Luong inhibition kinetics models, the Aiba model was the most suitable for describing the inhibitory effect of FA on AOB activity. The statistical constants, i.e., residual square sum (RSS) correlation coefficient (R2), F value of the fitting equation, and confidence degree (P) were 0.005, 0.932, 181.7, and 1.06×10-9, respectively. The dynamic constant values, i.e., maximum specific nitrite production rate (rmax), half saturation constant (KS), and inhibition constant (KI) were 0.37 g·(g·d)-1, 11.78 mg·L-1, and 153.74 mg·L-1, respectively.
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Affiliation(s)
- Hong-Wei Sun
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.,Gansu Sewage Treatment Industry Technical Center, Lanzhou 730070, China
| | - Xue Yu
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.,Gansu Sewage Treatment Industry Technical Center, Lanzhou 730070, China
| | - Yu-Xue Gao
- Design Institute of Beijing Sound Environmental Engineering Co., Ltd., Beijing 101102, China
| | - Wei-Wei Li
- Gansu Province Light Industry Research Institute, Lanzhou 730070, China
| | - Guo-Ping Qi
- Gansu Province Light Industry Research Institute, Lanzhou 730070, China
| | - Juan Xu
- Solid Waste and Chemicals Management Center, Ministry of Environmental Protection, Beijing 100029, China
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Li X, Wang X, Wu D, Chen ZB, Wang MX, Gao YX, Gong CX, Qin M. [Interleukin-1β and C-reactive protein level in plasma and gingival crevicular fluid in adolescents with diabetes mellitus]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:538-542. [PMID: 29930426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE Cytokines produced by various cells are strong local mediators of inflammation. Interleukin-1beta (IL-1β) and C-reactive protein (CRP) play essential roles in the development and progression of diabetes mellitus (DM). Thus periodontal diseases could be related to DM via the same mediators of inflammation. To evaluate plasma and gingival crevicular fluid (GCF) levels of IL-1β and CRP in adolescents with DM to further investigate whether DM has an impact on the levels of inflammation factors at an early stage, and to analyze the risk of developing periodontal diseases in adolescents with DM. METHODS A total of 121 adolescents aged from ten to sixteen years were enrolled, 41 adolescents diagnosed with diabetes mellitus were collected in the DM group, and 80 nondiabetic adolescents as the control group. The periodontal indices of each individual were recorded, including plaque index (PLI), modified bleeding index (mBI), probing depth (PD) and attachment loss (AL). GCF and intravenous blood samples were collected, and CRP and IL-1β levels were detected by enzyme-linked immunosorbent assay (ELISA). RESULTS (1) PLI of DM group and control group were 1.23±0.05 and 0.95±0.04 separately, with significant difference (P=0.001). DM group and control group had mBI of 0.80±0.08 and 0.51±0.06 separately, with significant difference (P=0.003). Attachment loss was found in none of the subjects. PDs of DM group and control group were (2.37±0.51) mm and (2.31±0.05) mm separately, and there was no significant difference. (2) CRP in GCF was only detectable in partial of the individuals, with a detectable rate of 22.9% (11/48) in total. The detectable rate of CRP in GCF was significantly higher in DM group (38.5%) than that in control group (4.5%, P=0.006). The plasma level of CRP in DM group [0.23 (0.15, 1.89) mg/L] was higher than that in control group [0.19 (0.12, 4.18) mg/L], but without significance (P=0.776). (3) The plasma levels of IL-1β in DM group and control group were (14.11±0.57) ng/L and (14.71±0.50) ng/L separately, but there was no significance (P=0.456). GCF levels of IL-1β in DM group and control group were (12.91±1.95) μg/L and (17.68±3.07) μg/L, without significant difference (P=0.185). CONCLUSION Periodontitis was not observed in adolescents with DM at an early stage. However, the rising levels of periodontal indices and CRP in GCF, might indicate that adolescents with DM have a higher risk of developing periodontal diseases in the future.
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Affiliation(s)
- X Li
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - X Wang
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - D Wu
- Department of Endocrinology, Genetics, and Metabolism, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - Z B Chen
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - M X Wang
- Department of Dentistry, Capital Institute of Pediatrics, Beijing 100020, China
| | - Y X Gao
- Department of Dentistry, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - C X Gong
- Department of Endocrinology, Genetics, and Metabolism, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - M Qin
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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19
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Gao YX, Liu YT, Zhang YY, Qiu JJ, Zhao TT, Yu CA, Zheng JG. [Establishment of β-aminopropionitrile-induced aortic dissection model in C57Bl/6J mice]. Zhonghua Xin Xue Guan Bing Za Zhi 2018; 46:137-142. [PMID: 29495238 DOI: 10.3760/cma.j.issn.0253-3758.2018.02.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To establish the mouse aorta dissection (AD) model through drinking water containing β-aminopropionitrile (BAPN). Methods: Forty 3-week-old C57B1/6J male mice were divided into four groups according to randomized block design: control, 0.2, 0.4 and 0.8 g·kg(-1)·d(-1) BAPN groups (dissolving respective dose of BAPN in the drinking water, n=10 each group). Arterial systolic blood pressure and heart rate were measured weekly in conscious, restrained mice using a noninvasive computerized tail-cuff system. Mice those died of rupture of aortic dissecting aneurysm during the study were autopsied and the aorta was examined. After 4 weeks, survived mice were sacrificed by an overdose of sodium pentobarbital and the whole aorta was harvested and analyzed. Results: The incidence of AD and the mortality of ruptured AD was 0 and 0 in control group, 30% (3/10) and 20% (2/10) in 0.2 g·kg(-1)·d(-1) BAPN group, 50% (5/10) and 40% (4/10) in 0.4 g·kg(-1)·d(-1) BAPN group, 90% (9/10) and 70% (7/10) in 0.8 g·kg(-1)·d(-1) BAPN group (both P<0.05 vs. control group). The incidence of AD and the mortality of ruptured AD increased in proportion to BAPN concentration increase. In 0.8 g·kg(-1)·d(-1) BAPN group, 7 mice died of dissecting aneurysm rupture during the experiment, among which 5 dissecting aneurysms were mainly located in the thoracic aorta and 2 dissecting aneurysms in abdominal aorta. The diameters of thoracic aorta and abdominal aorta were (1.38±0.19) and (1.23±0.13) mm in control group, (2.43±1.56) and (1.30±0.26) mm in 0.2 g·kg(-1)·d(-1) BAPN group, (2.45±1.28) and (1.30±0.31) mm in 0.4 g·kg(-1)·d(-1) BAPN group, (2.87±0.57) and (1.95±0.81) mm in 0.8 g·kg(-1)·d(-1) BAPN group (both P<0.05 vs. control group). The diameters of thoracic aorta and abdominal aorta in mice also increased in proportion with BAPN concentration increase. Furthermore, blood-filled false lumen formation and elastic fibers fragmentation were evidenced in hematoxylin-eosin stained and Vitoria blue-Sirius red stained aortic cross-sections of mice in the 0.8 g·kg(-1)·d(-1) BAPN group. Conclusion: BAPN treatment induced aortic dissection model in C57Bl/6J mice can serve as a useful wild-type mouse model for the mechanism and pharmaceutical studies of AD.
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Affiliation(s)
- Y X Gao
- Department of Cardiology, China-Japan Friendship Hospital, Beijing 100029, China
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Liu R, Liu Q, Zhao ZM, Zhao GD, Tan XL, Gao YX, Yin ZZ. [The lesser omentum approach for laparoscopic pancreatic enucleation]. Zhonghua Wai Ke Za Zhi 2017; 55:364-367. [PMID: 28464577 DOI: 10.3760/cma.j.issn.0529-5815.2017.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the feasibility and strategy of the lesser omentum approach for laparoscopic pancreatic enucleation. Methods: Between June 2011 and October 2013, 6 laparoscopic pancreatic enucleations were performed by lesser omentum approach.The average age was 42 years, including 1 male and 5 female.The preoperation diagnosis of 6 cases were pancreatic islet cell tumors determined by abdominal CT/MRI, ultrasound and digital subtraction angiography.The tumors of 3 cases located in pancreatic neck, 2 tumors located in neck and body of pancreas, and 1 tumor located in pancreatic body.Their biggest tumor diameter were 0.8-2.5 cm. Results: Among the 6 cases, all laparoscopic pancreatic enucleations were successfully performed.None of the patients were converted to open operation.Eestimated blood loss was (26.7±18.6)ml, operating time was (82.5±19.4)minutes, and postoperative length of stay was (5.17±1.17)days.Additionally, postoperative complication included grade A pancreatic fistula in 1 case.After 36-64 months followed-up, there was no tumor recurrence and clinical symptom disappeared. Conclusion: For the islet cell tumors located in pancreatic neck and body, the lesser omentumapproach may contribute to good surgical view and operative space, which can make pancreatectomy safer and easier for clinical application.
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Affiliation(s)
- R Liu
- Second Department of Hepatobiliary, People's Liberation Army Genral Hospital, Beijing 100853, China
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21
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Wang DW, Gao YX. [The image of the ancient Indian pharmacists in the Chinese Buddhist scriptures]. Zhonghua Yi Shi Za Zhi 2016; 46:279-284. [PMID: 28104001 DOI: 10.3760/cma.j.issn.0255-7053.2016.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the Chinese Buddhist Scriptures, there are many stories or topics about the ancient Indian pharmacist, however, they are not the Medicine Buddha as people knows, but real doctors. In the Chinese Buddhist Scriptures, the doctors gave the medical service to the monks and the laymen. Some of them are respected as the "miracle doctor" or the "king of doctor" , influencing the medicine of ancient East Asian.
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Affiliation(s)
- D W Wang
- Institute of Taoism and Religious Culture, Sichuan University, Chengdu, 610064; School of Basic Medical Science, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075
| | - Y X Gao
- School of Basic Medical Science, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
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Zhao ZM, Li CG, Hu MG, Gao YX, Liu R. Influence of the c.1517G>C genetic variant in the XRCC1 gene on pancreatic cancer susceptibility in a Chinese population. Genet Mol Res 2014; 13:4466-72. [PMID: 25036351 DOI: 10.4238/2014.june.16.5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We investigated the influence of the c.1517G>C genetic variant in the X-ray repair complementing group 1 gene (XRCC1) on pancreatic cancer (PC) susceptibility in Chinese patients. A total of 390 PC patients and 392 controls were enrolled in this case-control study. The genotypes of c.1517G>C genetic variants were determined using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis. Our findings suggested that the allele and genotype frequencies in PC patients were significantly different from those in cancer-free controls. The CC genotype was associated with an increased risk of PC compared to the wild-type GG genotype (odds ratio=2.43, 95% confidence interval 1.43-4.13, X2=11.19, P=0.001). The C allele may contribute to the development of PC (C vs G, odds ratio=1.32, 95% confidence interval 1.06-1.64, X2=6.25, P=0.012). Results from this study indicate that the c.1517G>C genetic variant of the XRCC1 gene is significantly associated with PC susceptibility in the Chinese population.
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Affiliation(s)
- Z M Zhao
- Department of Surgical Oncology, The Chinese PLA General Hospital, Beijing, China
| | - C G Li
- Department of Surgical Oncology, The Chinese PLA General Hospital, Beijing, China
| | - M G Hu
- Department of Surgical Oncology, The Chinese PLA General Hospital, Beijing, China
| | - Y X Gao
- Department of Surgical Oncology, The Chinese PLA General Hospital, Beijing, China
| | - R Liu
- Department of Surgical Oncology, The Chinese PLA General Hospital, Beijing, China
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Abstract
MicroRNAs (miRNAs) are potent regulators of gene transcription and posttranscriptional processes. The majority of miRNAs are localized within intronic regions of protein-coding genes (host genes) and have diverse functions in regulating important cellular processes in animals. To date, few plant intronic miRNAs have been studied functionally. Here we report a comprehensive computational analysis to characterize intronic miRNAs in rice and Arabidopsis. RT-PCR analysis confirmed that the identified intronic miRNAs were derived from the real introns of host genes. Interestingly, 13 intronic miRNAs in rice and two in Arabidopsis were located within seven clusters, of which four polycistronic clusters contain miRNAs derived from different families, suggesting that these clustered intronic miRNAs might be involved in extremely complex regulation in rice. Length analysis of miRNA-carrying introns, promoter prediction and qRT-PCR analysis results indicated that intronic miRNAs are coexpressed with their host genes. Expression pattern analysis demonstrated that host genes had a very broad expression spectrum in different stages of development, suggesting the intronic miRNAs might play an important role in plant development. This comparative genomics analysis of intronic miRNAs in rice and Arabidopsis provides new insight into the functions and regulatory mechanisms of intronic miRNAs in monocots and dicots.
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Affiliation(s)
- G D Yang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
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Scarpace PJ, Matheny M, Kirichenko N, Gao YX, Tümer N, Zhang Y. Leptin overexpression in VTA trans-activates the hypothalamus whereas prolonged leptin action in either region cross-desensitizes. Neuropharmacology 2013; 65:90-100. [PMID: 22982569 PMCID: PMC3521099 DOI: 10.1016/j.neuropharm.2012.09.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 09/04/2012] [Accepted: 09/05/2012] [Indexed: 11/26/2022]
Abstract
High-fat feeding or CNS leptin overexpression in chow-fed rats results in a region-specific cellular leptin resistance in medial basal hypothalamic regions and the ventral tegmental area (VTA). The present investigation examined the effects of targeted chronic leptin overexpression in the VTA as compared with the medial basal hypothalamus on long-term body weight homeostasis. The study also examined if this targeted intervention conserves regional leptin sensitivity or results in localized leptin resistance. Cellular leptin resistance was assessed by leptin-stimulated phosphorylation of signal transducers and activators of transcription 3 (STAT3). Tyrosine hydroxylase was measured in hypothalamus and VTA along with brown adipose tissue uncoupling protein 1. Leptin overexpression in VTA tempered HF-induced obesity, but to a slightly lesser extent than that with leptin overexpression in the hypothalamus. Moreover, the overexpression of leptin in the VTA stimulated cellular STAT3 phosphorylation in several regions of the medial basal hypothalamus, whereas verexpression in the hypothalamus did not activate STAT3 signaling in the VTA. This unidirectional trans-stimulation did not appear to involve migration of either the vector or the gene product. Long-term leptin overexpression in either the medial basal hypothalamus or VTA caused desensitization of leptin signaling in the treated region and cross-desensitization of leptin signaling in the untreated region. These results demonstrate a role of leptin receptors in the VTA in long-term body weight regulation, but the trans-activation of the hypothalamus following VTA leptin stimulation suggests that an integrative response involving both brain regions may account for the observed physiological outcomes.
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Affiliation(s)
- P J Scarpace
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville, FL 32610, USA.
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Wang LM, Luo XZ, Zhang YM, Lian JJ, Gao YX, Zheng Z. Effect of earthworm loads on organic matter and nutrient removal efficiencies in synthetic domestic wastewater, and on bacterial community structure and diversity in vermifiltration. Water Sci Technol 2013; 68:43-49. [PMID: 23823538 DOI: 10.2166/wst.2013.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, we studied the effect of earthworm loads on the removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), total nitrogen, and total phosphorus from synthetic domestic sewage and on the bacterial community structure and diversity of substrates in earthworm packing beds. The different vermifiltrations (VFs), including the control, are successful in removing both organic matter (OM) and nutrients. The removal rate of NH3-N at 12.5 g of earthworm/L of soil VF is higher compared with that at 0 and 4.5 earthworm load VFs. The highest Shannon index, in the earthworm packing bed, occurred at 16.5 earthworm load VF. Furthermore, the COD removal rate is significantly correlated with the Shannon index, which reveals that OM removal for synthetic domestic sewage treatment at VF might be more dependent on bacterial diversity at the earthworm packing bed. The band distributions and diversities of the bacterial community for samples from different earthworm loads in VFs suggest that the bacterial community structure was only affected within the earthworm packing bed when the earthworm load reached a certain level. The present study adds to the current understanding of OM and nutrient degradation processes in VF domestic wastewater treatment.
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Affiliation(s)
- L M Wang
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, No. 8, Jiang Wang Miao Street, Nanjing 210042, China.
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Li YH, Gao YX, Zhang Y, Li CY, Wang X, Zhu GY. Research on the effects of family support system for the physical and mental development and the family of children with brain injury. INT J EVID-BASED HEA 2012. [DOI: 10.1097/01258363-201209000-00113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gao YX, Yang M, Zhang Y, Hu JY. Treatment of oilfield wastewater by Fenton's process. Water Sci Technol 2004; 49:103-108. [PMID: 15077956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A combination of coagulation and Fenton's process was used for the removal of total oxygen carbon (TOC) from oilfield wastewater. Compared with aluminium sulfate, ferric coagulant had better TOC removal efficiency at the same mass dosage. In Fenton's process, the effect of H2O2 and Fe2+ dose on the removal of TOC was studied. The optimum conditions required for TOC removal were an Fe3+ concentration of 40-50 mg/L, an H2O2 dose of 50 mmol/L and an Fe2+ concentration of 1.0 mmol/L. GC-MS chromatographic analysis indicated that most of the alkyl hydrocarbons of carbon numbers < 21 were removed in the first minute of Fenton's process mainly through adsorption. Alkyl hydrocarbons and phenols were oxidized almost completely following 120 min of treatment. The pathway of newly formed intermediates in Fenton's process was proposed on the basis of the GC/MS chromatogram.
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Affiliation(s)
- Y X Gao
- Department of Urban and Environmental Sciences, Peking University, Beijing, 100871, China.
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Abstract
A microwave preparation procedure is proposed for selenium speciation in natural and drinking waters. Different chemical reagents were tested, and the conditions for Se speciation were optimized. The effect of the different reagents on various oxidation states of selenium under microwave digestion conditions was investigated. Most of the Se(-II) was converted to selenite when digested with HNO3 and <20% to selenate. The digestion with H2O2/H2SO4 can change most Se species into Se(IV). The concentration of Se(IV) in the samples was then determined by HPLC with a fluorescence detector after derivatization with 2,3-diamino-naphthalene (DAN). The microwave preparation procedure allows Se speciation in water samples. Se(IV) was determined after concentrating the sample under nitrogen protection. The amount of Se(IV) and Se(VI) was measured by adding an equal volume of concentrated hydrochloric acid to water sample to reduce Se(VI) to Se(IV). Then the amount of Se(VI) can be calculated by subtraction. The total selenium can be determined after digestion with H2O2/H2SO4, or after digestion with HNO3 followed by reduction with concentrated hydrochloric acid. Selenium (-II, 0) was calculated by subtracting inorganic Se(IV+VI) from the total. Detection limits of 0.0066 ng and 0.0096 ng Se were obtained for HNO3 and H202/H2SO4 as digestion reagents, respectively. The total Se in the four water samples tested range from 0.20 to 0.90 microg L(-1). Among them the dominant form was Se(VI) with the exception of pond waters where Se(-II) predominated.
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Affiliation(s)
- Z Wang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing.
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Abstract
Effects of arsenite, arsenate and vanadate on human erythrocyte membrane have been assessed according to their routes passing through the membrane, their binding modes to the membrane and their influences on membrane proteins and lipids. The uptake of arsenate (1.0 mM) by cells approached a limit with intracellular arsenic of about 0.2 mM in 5 h, and was strongly inhibited (approximately 95%) by 4,4'-diisothiocyano-2,2'-disulfonic stilbene (DIDS), indicating that arsenate, similar to vanadate, passed across the membrane through the anion exchange protein, band 3. Arsenite (1.0 mM) influx reached a maximum of about 0.4 mM in 30 min, and was not inhibited by DIDS. The transformed species of arsenite bound to the membrane from cytosol. In contrast, arsenate bound rapidly from the outside, followed by releasing and re-binding. The binding to the membrane via sulfhydryl was indicated by the decrease of the sulfhydryl level of membrane proteins. Polyacrylamide gel electrophoresis in sodium dodecyl sulfate (SDS-PAGE) analysis revealed that the proteins, bands 1-3, were among the targets of arsenite, arsenate and vanadate. Their binding to the membrane also induced changes in the fluidity of membrane lipids and in the negative charge density in the outer surface of the membrane.
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Affiliation(s)
- T L Zhang
- Department of Bioinorganic Chemistry and Inorganic Pharmaceutical Chemistry, Beijing Medical University, PR China
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