1
|
Zhou XC, Wang DX, Zhang CY, Yang YJ, Zhao RB, Liu SY, Ni GX. Exercise promotes osteogenic differentiation by activating the long non-coding RNA H19/microRNA-149 axis. World J Orthop 2024; 15:363-378. [PMID: 38680671 PMCID: PMC11045468 DOI: 10.5312/wjo.v15.i4.363] [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] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/04/2024] [Accepted: 03/19/2024] [Indexed: 04/16/2024] Open
Abstract
BACKGROUND Regular physical activity during childhood and adolescence is beneficial to bone development, as evidenced by the ability to increase bone density and peak bone mass by promoting bone formation. AIM To investigate the effects of exercise on bone formation in growing mice and to investigate the underlying mechanisms. METHODS 20 growing mice were randomly divided into two groups: Con group (control group, n = 10) and Ex group (treadmill exercise group, n = 10). Hematoxylin-eosin staining, immunohistochemistry, and micro-CT scanning were used to assess the bone formation-related indexes of the mouse femur. Bioinformatics analysis was used to find potential miRNAs targets of long non-coding RNA H19 (lncRNA H19). RT-qPCR and Western Blot were used to confirm potential miRNA target genes of lncRNA H19 and the role of lncRNA H19 in promoting osteogenic differentiation. RESULTS Compared with the Con group, the expression of bone morphogenetic protein 2 was also significantly increased. The micro-CT results showed that 8 wk moderate-intensity treadmill exercise significantly increased bone mineral density, bone volume fraction, and the number of trabeculae, and decreased trabecular segregation in the femur of mice. Inhibition of lncRNA H19 significantly upregulated the expression of miR-149 and suppressed the expression of markers of osteogenic differentiation. In addition, knockdown of lncRNA H19 significantly downregulated the expression of autophagy markers, which is consistent with the results of autophagy-related protein changes detected in mouse femurs by immunofluorescence. CONCLUSION Appropriate treadmill exercise can effectively stimulate bone formation and promote the increase of bone density and bone volume in growing mice, thus enhancing the peak bone mass of mice. The lncRNA H19/miR-149 axis plays an important regulatory role in osteogenic differentiation.
Collapse
Affiliation(s)
- Xu-Chang Zhou
- School of Sport Medicine and Rehabilitation, Beijing Sport University, Beijing 100084, China
| | - Dong-Xue Wang
- School of Sport Medicine and Rehabilitation, Beijing Sport University, Beijing 100084, China
| | - Chun-Yu Zhang
- School of Sport Medicine and Rehabilitation, Beijing Sport University, Beijing 100084, China
| | - Ya-Jing Yang
- Department of Acupuncture and Moxibustion, Hubei University of Chinese Medicine, Wuhan 430065, Hubei Province, China
| | - Ruo-Bing Zhao
- School of Sport Medicine and Rehabilitation, Beijing Sport University, Beijing 100084, China
| | - Sheng-Yao Liu
- Department of Spinal Surgery, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, Guangdong Province, China
| | - Guo-Xin Ni
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Xiamen University, Xiamen 361003, Fujian Province, China
| |
Collapse
|
2
|
Zhou XC, Ni GX. O-linked β-N-acetylglucosaminylation may be a key regulatory factor in promoting osteogenic differentiation of bone marrow mesenchymal stromal cells. World J Stem Cells 2024; 16:228-231. [PMID: 38577231 PMCID: PMC10989286 DOI: 10.4252/wjsc.v16.i3.228] [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] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/02/2024] [Accepted: 02/29/2024] [Indexed: 03/25/2024] Open
Abstract
Cumulative evidence suggests that O-linked β-N-acetylglucosaminylation (O-GlcNAcylation) plays an important regulatory role in pathophysiological processes. Although the regulatory mechanisms of O-GlcNAcylation in tumors have been gradually elucidated, the potential mechanisms of O-GlcNAcylation in bone metabolism, particularly, in the osteogenic differentiation of bone marrow mesenchymal stromal cells (BMSCs) remains unexplored. In this study, the literature related to O-GlcNAcylation and BMSC osteogenic differentiation was reviewed, assuming that it could trigger more scholars to focus on research related to O-GlcNAcylation and bone metabolism and provide insights into the development of novel therapeutic targets for bone metabolism disorders such as osteoporosis.
Collapse
Affiliation(s)
- Xu-Chang Zhou
- School of Sport Medicine and Rehabilitation, Beijing Sport University, Beijing 100084, China
| | - Guo-Xin Ni
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Xiamen University, Xiamen 361003, Fujian Province, China.
| |
Collapse
|
3
|
Wu LP, Xie BS, Wang JY, DeJi JCM, Zhao FY, Ding X, Liu XJ, Lin XY, Zhou XC, Zhao Y, Wu Q, Shi BY. [Study on protective effects and mechanisms of total glucosides of Paeony on Graves disease in BALB/c mice]. Zhonghua Yi Xue Za Zhi 2023; 103:689-695. [PMID: 36858370 DOI: 10.3760/cma.j.cn112137-20220720-01584] [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: 03/03/2023]
Abstract
Objective: To investigate the protective effect and its immunoregulatory mechanism of Total Glucosides of Paeony (TGP) against Graves' Disease (GD) model on BALB/c mice. Methods: Fifty female (6 weeks old, weighing 16-18 g) BALB/c mice of specific pathogen free were divided into control group according to random number table method, model group, early low-dose TGP intervention group (250 mg·kg-1·d-1), early high-dose TGP intervention group (500 mg·kg-1·d-1), and late TGP intervention group, with 10 mice in each group. Except the control group, the other 4 groups were immunized 3 times (0, 3rd, and 6th week) with recombinant adenovirus expressing the thyroid stimulating hormone receptor (TSHR) A subunit to establish the GD model. The early low-dose and high-dose intervention group were given diets containing different doses of TGP throughout the whole process, and the late intervention group was given diets containing low doses of TGP from the 1st week after the 2nd immunization (week 4). The levels of thyrotropin receptor antibody (TRAb) and total thyroxine (TT4) were detected in the tail venous blood of mice at the 4th week. At the 10th week, the serum TRAb and TT4 levels and the ratio of regulatory T cells (Treg) in each group were detected, and the pathological changes of thyroid tissue were observed. Serum helper T cell 1(Th1) and Th2 cell-related factors interleukin-2 (IL-2), IL-4, IL-5, IL-10, IL-12p70, granulocyte-macrophage colony-stimulating factor (GM-CSF), interferon-γ (IFN-γ) and tumor necrosis factors-α (TNF-α) were detected to investigate the protective effect of TGP on GD model in BALB/c mice and its mechanism. Results: At the 4th week, The level of TT4 [(55.07±12.89) μg/L] in early high-dose intervention group was lower than that in model group [(74.33±8.63) μg/L] (all P<0.05). The level of TT4 in early low-dose intervention group and late intervention group and model group had no statistical significance (all P>0.05). TRAb level of mice between early low-dose, early high-dose, late intervention groups and model group was no significant difference (all P>0.05). At the 10th week, TRAb [(90.00±26.89) U/L] and TT4[(32.66±8.11) μg/L] levels in the early high-dose intervention group were lower than those in the model group [(396.97±95.35) U/L, (73.70±16.33) μg/L] (all P<0.05). The TRAb and TT4 levels in the early low-dose intervention group and late intervention group were not significantly different from those in the model group (all P>0.05). The thyroid tissue of hyperthyroidism mice in the early high dose intervention group showed focal hypertrophic changes, while the thyroid tissue of other hyperthyroidism mice showed diffuse hypertrophic changes. The CD4+CD25+/CD4+Treg ratio in early high-dose intervention group was higher than that in model group at the 10th week (4 weeks after three recombinant adenovirus immunization) (P<0.05). Compared with the model group at the 10th week, the levels of IL-2, IL-12p70 and IFN-γ in the early high-dose intervention group were all decreased (all P<0.05), and the levels of IL-10 were increased (P<0.05). Conclusion: Early high-dose (500 mg·kg-1·d-1) TGP intervention group displays a protective effect against GD mice, the mechanism of which may be related to regulatory T cell function changes and Th1/Th2 cytokine balance restoration.
Collapse
Affiliation(s)
- L P Wu
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - B S Xie
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - J Y Wang
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - J C M DeJi
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - F Y Zhao
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - X Ding
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - X J Liu
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - X Y Lin
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - X C Zhou
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Y Zhao
- Department of Gerontology, Shanxi Provincial People's Hospital, Xi'an 710068, China
| | - Q Wu
- Department of Epidemiology, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - B Y Shi
- Department of Endocrinology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| |
Collapse
|
4
|
Chen YJ, Liu W, Xi HB, Yu Y, Hu JP, Deng J, Lin LH, Li C, Wang GX, Fu B, Zhou XC. [The assistant effects of porcine fibrin sealant in improving stone clearance rate in flexible ureteroscopy lithotripsy in ex vivo porcine kidney model]. Zhonghua Yi Xue Za Zhi 2022; 102:1660-1665. [PMID: 35692018 DOI: 10.3760/cma.j.cn112137-20211027-02380] [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: 06/15/2023]
Abstract
Objectives: To investigate the feasibility of using a porcine fibrin sealant to wrap and remove kidney calculi fragments through an isolated porcine kidney model. Methods: In the isolated porcine kidney stone model (implanted with 100 mg, air dried, ≤1 mm human stone fragments, n=6;implanted with 100 mg, air dried, ≤3 mm human stone fragments, n=6), the ureteral soft mirror combined with the 12/14Fr UAS was used to test the effect of stone extraction using only two stone extraction methods: basket extraction (control group, ≤1 mm stone fragments, n=3; ≤3 mm stone fragments, n=3) and basket-sealant extraction (test group, ≤1 mm stone fragments, n=3; ≤3 mm stone fragments, n=3). Compare the stone removal rate and operation time of the two stone retrieval methods. The sealant was put into urine of normal human and observed. Results: Porcine Fibrin Sealant can form a gel in saline and urine and adhere and wrap stone fragments. The time of procedures of test (basket-sealant) and control (basket) group in kidneys implanted with ≤ 1 mm stone fragments were (14.0±4.2) and (29.0±0.7)min (P<0.05) stone clearance rates were (90.9±1.4)% and (48.4±15.7)% (P<0.05), respectively. In kidneys implanted with ≤ 3 mm fragments, time of procedures were (12.8±4.0) and (30.0±0)min (P<0.05) Stone clearance rates were (91.1±5.0)% and (20.7±8.0)% (P<0.05). The Sealant dissolves by itself in normal human urine and normal saline at 37 ℃ for 24 hours. Conclusion: The appropriate concentration of Porcine Fibrin Sealant assisted stone retrieval may become a new method for removing small stone fragments in retrograde intrarenal surgery.
Collapse
Affiliation(s)
- Y J Chen
- Nanchang University Medical College, Nanchang 330006, China
| | - W Liu
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - H B Xi
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Y Yu
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - J P Hu
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - J Deng
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - L H Lin
- Nanchang University Medical College, Nanchang 330006, China
| | - C Li
- Nanchang University Medical College, Nanchang 330006, China
| | - G X Wang
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - B Fu
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - X C Zhou
- Department of Urology, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| |
Collapse
|
5
|
Zhang L, Jiang Y, Wei M, Cheng BH, Zhou XC, Li J, Tian JH, Dong L, Hu RH. [Analysis of the pregnancy outcomes in pregnant women with COVID-19 in Hubei Province]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:166-171. [PMID: 32145714 DOI: 10.3760/cma.j.cn112141-20200218-00111] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [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 study the effect of COVID-19 on pregnancy outcomes and neonatal prognosis in Hubei Province. Method: s A retrospective comparison of the pregnancy outcomes was done between 16 women with COVID-19 and 45 women without COVID-19. Also, the results of laboratory tests, imaging examinations, and the 2019 novel coronavirus (2019-nCoV) nucleic acid test were performed in 10 cases of neonatal delivered from women with COVID-19. Result: s (1) Of the 16 pregnant women with COVID-19, 15 cases were ordinary type and 1 case was severe type. No one has progressed to critical pneumonia.The delivery method of the two groups was cesarean section, and the gestational age were (38.7±1.4) and (37.9±1.6) weeks,there was no significant difference between the two groups (P>0.05). Also, there wee no significant differences in the intraoperative blood loss and birth weight of the newborn between the two groups (all P>0.05). (2) Ten cases of neonates delivered from pregnant women with COVID-19 were collected. The 2019-nCoV nucleic acid test were all negative.There were no significant differences in fetal distress, meconium-stained amniotic fluid, preterm birth, and neonatal asphyxia between the two groups (all P>0.05).(3) In the treatment of uterine contraction fatigue, carbetocin or carboprost tromethamine was used more in cesarean section for pregnant women with COVID-19 (1.3±0.6), compared with Non-COVID-19 group (0.5±0.7),the difference was statistically significant (P=0.001). Conclusions: If there is an indication for obstetric surgery or critical illness of COVID-19 in pregnant women, timely termination of pregnancy will not increase the risk of premature birth and asphyxia of the newborn, but it is beneficial to the treatment and rehabilitation of maternal pneumonia. Preventive use of long-acting uterotonic agents could reduce the incidence of postpartum hemorrhage during surgery. 2019-nCoV infection has not been found in neonates delivered from pregnant women with COVID-19.
Collapse
Affiliation(s)
- L Zhang
- Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Y Jiang
- Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - M Wei
- Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - B H Cheng
- Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - X C Zhou
- Department of Neonatology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - J Li
- Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - J H Tian
- Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - L Dong
- Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - R H Hu
- Department of Obstetrics, The Central Hospital of Qianjiang City, Qianjiang 433199, China
| |
Collapse
|
6
|
Cui Z, Liu QL, Sun SQ, Jiao K, Liu DR, Zhou XC, Huang L. MiR-378a-5p inhibits angiogenesis of oral squamous cell carcinoma by targeting KLK4. Neoplasma 2019; 67:85-92. [PMID: 31829025 DOI: 10.4149/neo_2019_190306n191] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 06/19/2019] [Indexed: 12/26/2022]
Abstract
Oral squamous cell carcinoma (OSCC) is still a leading cause of cancer death owing to distant metastasis, which is largely facilitated by tumor angiogenesis. MicroRNA (miR)-378a-5p and Kallikrein-related peptidase 4 (KLK4) participate in tumorigenesis and tumor metastasis according to previous studies, yet the exact role they play in tumor angiogenesis remains poorly understood. The aim of the present study is to investigate the effect of miR-378a-5p and KLK4 on angiogenesis of OSCC. MTT assay showed that the expression level of miR-378a-5p was negatively correlated with the proliferation of OSCC cells. ELISA and Western blot assay showed that down-regulation of miR-378a-5p promotes VEGF expression. Tube formation and in vivo chicken chorioallantoic membrane (CAM) assay showed that inhibition of miR-378a-5p reduced tube formation of human umbilical vein endothelial cells (HUVECs) and newly formed microvessel. On the contrary, over-expression of KLK4 enhanced angiogenesis of OSCC cells with increased VEGF expression, tube formation activity of HUVECs and newly formed microvessel. Moreover, the dual-luciferase assay validated that KLK4 was a target gene of miR-378a-5p. MiR-378a-5p silencing induced tube formation was suppressed by the downregulation of KLK4. Besides, the activation of Wnt/β-catenin signaling pathway in miR-378a-5p antagomir transfected cells was also blocked by the KLK4 shRNA. To sum up, our study suggests that miR-378a-5p suppressed angiogenesis of OSCC at least partly by the regulation of KLK4.
Collapse
Affiliation(s)
- Z Cui
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Q L Liu
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - S Q Sun
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - K Jiao
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - D R Liu
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - X C Zhou
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - L Huang
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China
| |
Collapse
|
7
|
Ding SJ, Huang RC, Jia CF, Zhong L, An P, Wang ZQ, Zhu H, Wu BL, Zhou XC. [The relationship between myocardial bridge in mural coronary artery segment and coronary atherosclerosis]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 44:873-878. [PMID: 27903374 DOI: 10.3760/cma.j.issn.0253-3758.2016.10.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Objective: The myocardial bridging (MB) prevalence, anatomic characteristics of MB, and the relationship between characteristics of MB in mural coronary artery segment and coronary atherosclerosis were analyzed. Methods: In this perspective nonrandomized controlled study, a total of 1 132 patients who admitted to our hospital for suspected or known coronary artery disease from January 2012 to June 2013 were enrolled. All patients underwent dual-source 64-slice spiral CT coronary angiography. The general patient characteristics including gender, age, history of hypertension, diabetes, hyperlipidemia and smoking, serum level of total cholesterol (TC) and LDL-C were recorded. The length, depth and the degree of compression of myocardial bridge in systolic or diastolic phase were also analyzed in patients with MB. The relationship between MB and coronary atherosclerosis, the characteristics of MB and coronary atherosclerosis were analyzed by Spearman correlation analysis, univariate logistic regression analysis, variate logistic regression analysis and linear regression analysis. Results: Myocardial bridging was detected in 330 out of 1 132 patients, and MB was mostly located in the mural coronary artery (329/330) and at the mid-distal segment of the left anterior descending artery (LAD). Average MB length was 20.1 mm (3.3-95.5 mm) and the average depth was 2.13 mm (0.24-12.40 mm). There were 140 patients with intramyocardial MB (42.6%) and 189 patients with superficial MB (57.4%). Myocardial bridging was an independent protective factor of coronary atherosclerosis (OR=0.361, P=0.000) and the proximal segment of MB was more susceptible to atherosclerosis compared to the distal segment of MB (P=0.000). Multivariate analysis revealed that age, hypertension and the degree of compression of myocardial bridge in diastolic phase were independent factors related to the atherosclerosis (odds ratio: 1.064, 2.186 and 1.049 respectively, P value: 0.000, 0.002 and 0.000). The depth of MB was significantly correlated with systolic or diastolic narrowing(OR: 4.227, 3.398 and P value: 0.000, 0.001). Conclusions: The prevalence of myocardial bridging is 29% in this patient cohort. The proximal segment of myocardial bridging in mural coronary artery is more susceptible to atherosclerosis. In addition, the depth of myocardial bridging and the degree of compression of myocardial bridge in diastolic phase are the independent factors related to atherosclerosis.
Collapse
Affiliation(s)
- S J Ding
- *Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Chen X, Zhou XC, Liu S, Wu RF, Aparicio C, Wu JY. In vivo osseointegration of dental implants with an antimicrobial peptide coating. J Mater Sci: Mater Med 2017; 28:76. [PMID: 28386851 DOI: 10.1007/s10856-017-5885-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/15/2017] [Indexed: 06/07/2023]
Abstract
This study aimed to evaluate the in vivo osseointegration of implants with hydrophobic antimicrobial GL13K-peptide coating in rabbit femoral condyles by micro-CT and histological analysis. Six male Japanese Rabbits (4 months old and weighing 2.5 kg each) were included in this study. Twelve implants (3.75 mm wide, 7 mm long) were randomly distributed in two groups, with six implants in the experimental group coated with GL13K peptide and six implants in the control group without surface coating. Each implant in the test and the control group was randomly implanted in the left or right side of femoral condyles. On one side randomly-selected of the femur, each rabbit received a drill that was left without implant as control for the natural healing of bone. After 3 weeks of healing radiographic evaluation of the implant sites was taken. After 6 weeks of healing, rabbits were sacrificed for evaluation of the short-term osseointegration of the dental implants using digital radiography, micro-CT and histology analysis. To perform evaluation of osseointegration, implant location and group was double blinded for surgeon and histology/radiology researcher. Two rabbits died of wound infection in sites with non-coated implants 2 weeks after surgery. Thus, at least four rabbits per group survived after 6 weeks of healing. The wounds healed without suppuration and inflammation. No implant was loose after 6 weeks of healing. Radiography observations showed good osseointegration after 3 and 6 weeks postoperatively, which proved that the tissues followed a natural healing process. Micro-CT reconstruction and analysis showed that there was no statistically significant difference (P > 0.05) in volume of bone around the implant between implants coated with GL13K peptide and implants without coating. Histomorphometric analysis also showed that the mineralized bone area was no statistically different (P > 0.05) between implants coated with GL13K peptide and implants without coating. This study demonstrates that titanium dental implants with an antimicrobial GL13K coating enables in vivo implant osseointegration at similar bone growth rates than gold-standard non-coated dental implants up to 6 weeks of implantation in rabbit femurs.
Collapse
Affiliation(s)
- X Chen
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota School of Dentistry, Moos Tower, 515 Delaware St. SE, Minneapolis, MN, 55455, USA
| | - X C Zhou
- Department of Orthodontics, Nanchang University, 49 Fuzhou Rd, Nanchang, 330008, China
| | - S Liu
- Department of Orthodontics, Nanchang University, 49 Fuzhou Rd, Nanchang, 330008, China
| | - R F Wu
- Department of Implantology, Nanchang University, 49 Fuzhou Rd, Nanchang, 330008, China
| | - C Aparicio
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota School of Dentistry, Moos Tower, 515 Delaware St. SE, Minneapolis, MN, 55455, USA
| | - J Y Wu
- Department of Orthodontics, Nanchang University, 49 Fuzhou Rd, Nanchang, 330008, China.
- Department of Stomatology, XinHua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kongjiang Rd, Shanghai, 200092, China.
| |
Collapse
|
9
|
Belniak MH, Zhou XC. Patient Outcomes in Cases of Endometrial Cancer (EMC) and Endometrial Hyperplasia (EH) Diagnosed Following Uterine Morcellation at the Time of Hysterectomy. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.761] [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: 10/20/2022]
|
10
|
Mao CG, Wan LJ, Zhou XC, Lu HT, Jiang YD, Tao ZZ. [Study on Indole-3-carbinol inhibits nasopharyngeal carcinoma cells growth in vitra and in vivo]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1215-1218. [PMID: 29798332 DOI: 10.13201/j.issn.1001-1781.2016.15.009] [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] [Received: 04/06/2016] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to investigate the inhibition of nasopharyngeal carcinoma cells by indole-3-carbinol in vitro and in vivo.Method:The human nasopharyngeal carcinoma cell line CNE2 was treated in different concentrations 0,100,200,300 μmol/L of indole-3-carbinol. Then we detected cell proliferation after 0,24,48 and 72 h, apoptosis after 48 h and the levels of PI3K/Akt pathway-related proteins in vitro. The BALB/c nude mice were divided into three groups: prevention group, treatment group and control group. In vivo, the nude mice in every group were inoculated with nasopharyngeal carcinoma cells CNE2, and mice in prevention and treatment groups were given feed containing 0.5% indole-3-carbinol. We investigated the tumoricidal effect of I3C in nude mice , and eight weeks later, the PI3K/Akt pathway-related proteins expressions in tumors from nude mice of each group were detected.Result:With the indole-3-carbinol concentration increased, cell proliferation decreased and apoptosis increased significantly.The levels of PI3K/Akt pathway-related proteins were decreased.In animal experiments, the prevention and treatment group developed smaller tumors, and the expression of PI3K/Akt pathway-related proteins in prevention and treatment groups PI3K/Akt pathway also reduced, compared to control group. Meanwhile, nearly no changes of heart, liver and kidney tissues in all groups were seen in HE staining.Conclusion:Indole-3-carbinol inhibited the growth of nasopharyngeal carcinoma cells and induced apoptosis effectively in vivo and in vitro. The mechanism might be that indole-3-carbinol could suppress PI3K/Akt pathway.
Collapse
Affiliation(s)
- C G Mao
- Department of Otolaryngology, Jingzhou Central Hospital, the Second Clinical Medical College, Yangtze University, Jingzhou, 434020, China
| | - L J Wan
- Department of Otolaryngology, Jingzhou Central Hospital, the Second Clinical Medical College, Yangtze University, Jingzhou, 434020, China
| | - X C Zhou
- Department of Otolaryngology, Jingzhou Central Hospital, the Second Clinical Medical College, Yangtze University, Jingzhou, 434020, China
| | - H T Lu
- Department of Otolaryngology, Jingzhou Central Hospital, the Second Clinical Medical College, Yangtze University, Jingzhou, 434020, China
| | - Y D Jiang
- Department of Otolaryngology, Jingzhou Central Hospital, the Second Clinical Medical College, Yangtze University, Jingzhou, 434020, China
| | - Z Z Tao
- Department of Otolaryngology, Renmin Hospital of Wuhan University
| |
Collapse
|
11
|
Xu GG, Geng Z, Zhou XC, He YG, He TT, Mei JX, Yang YJ, Liu YQ, Xu CS. Three branches of phospholipase C signaling pathway promote hepatocyte growth in rat liver regeneration. Genet Mol Res 2015; 14:5710-23. [PMID: 26125770 DOI: 10.4238/2015.may.29.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
In general, the phospholipase C (PLC) signaling pathway is involved in many physiological activities, including cell growth. However, little is known regarding how the PLC signaling pathway participates in regulating hepatocyte (HC) growth during liver regeneration (LR). To further explore the influence of the PLC signaling pathway on HCs at the cellular level, HCs of high purity and vitality were isolated using Percoll density-gradient centrifugation after partial hepatectomy. The genes of the PLC signaling pathway and target genes of transcription factors in the pathway were obtained by searching the pathways and transcription factor databases, and changes in gene expression of isolated HCs were examined using the Rat Genome 230 2.0 Microarray. The results suggested that various genes involved in the pathway (including 151 known genes and 39 homologous genes) and cell growth (including 262 known genes and 37 homologous genes) were associated with LR. Subsequently, the synergetic effect of these genes in LR was analyzed using a mathematical model (Et) according to their expression profiles. The results showed that the Et values of G protein-coupled receptor/PLC, integrin/PLC, and growth factor receptor/PLC branches of the PLC pathway were all significantly strengthened during the progression and termination phases of LR. The synergetic effect of target genes, in parallel with target gene-related cell growth, was also enhanced during whole rat LR, suggesting the potential positive effect of PLC on HC growth. The present data indicate that the PLC signaling pathway may promote HC growth through 3 mechanisms during rat LR after partial hepatectomy.
Collapse
Affiliation(s)
- G G Xu
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Z Geng
- College of Life Science, Henan Normal University, Xinxiang, China
| | - X C Zhou
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Y G He
- College of Life Science, Henan Normal University, Xinxiang, China
| | - T T He
- College of Life Science, Henan Normal University, Xinxiang, China
| | - J X Mei
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Y J Yang
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Y Q Liu
- College of Life Science, Henan Normal University, Xinxiang, China
| | - C S Xu
- College of Life Science, Henan Normal University, Xinxiang, China
| |
Collapse
|
12
|
Anizan N, Wang H, Zhou XC, Wahl RL, Frey EC. Factors affecting the repeatability of gamma camera calibration for quantitative imaging applications using a sealed source. Phys Med Biol 2015; 60:1325-37. [PMID: 25592130 DOI: 10.1088/0031-9155/60/3/1325] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Several applications in nuclear medicine require absolute activity quantification of single photon emission computed tomography images. Obtaining a repeatable calibration factor that converts voxel values to activity units is essential for these applications. Because source preparation and measurement of the source activity using a radionuclide activity meter are potential sources of variability, this work investigated instrumentation and acquisition factors affecting repeatability using planar acquisition of sealed sources. The calibration factor was calculated for different acquisition and geometry conditions to evaluate the effect of the source size, lateral position of the source in the camera field-of-view (FOV), source-to-camera distance (SCD), and variability over time using sealed Ba-133 sources. A small region of interest (ROI) based on the source dimensions and collimator resolution was investigated to decrease the background effect. A statistical analysis with a mixed-effects model was used to evaluate quantitatively the effect of each variable on the global calibration factor variability. A variation of 1 cm in the measurement of the SCD from the assumed distance of 17 cm led to a variation of 1-2% in the calibration factor measurement using a small disc source (0.4 cm diameter) and less than 1% with a larger rod source (2.9 cm diameter). The lateral position of the source in the FOV and the variability over time had small impacts on calibration factor variability. The residual error component was well estimated by Poisson noise. Repeatability of better than 1% in a calibration factor measurement using a planar acquisition of a sealed source can be reasonably achieved. The best reproducibility was obtained with the largest source with a count rate much higher than the average background in the ROI, and when the SCD was positioned within 5 mm of the desired position. In this case, calibration source variability was limited by the quantum noise.
Collapse
Affiliation(s)
- N Anizan
- Department of Radiology, Johns Hopkins University, Baltimore, MD, USA
| | | | | | | | | |
Collapse
|
13
|
Suzman DL, Zhou XC, Zahurak ML, Lin J, Antonarakis ES. Change in PSA velocity is a predictor of overall survival in men with biochemically-recurrent prostate cancer treated with nonhormonal agents: combined analysis of four phase-2 trials. Prostate Cancer Prostatic Dis 2014; 18:49-55. [PMID: 25384338 PMCID: PMC4323734 DOI: 10.1038/pcan.2014.44] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 06/26/2014] [Revised: 08/28/2014] [Accepted: 09/23/2014] [Indexed: 11/27/2022]
Abstract
Background Multiple phase-2 trials in men with biochemically-recurrent prostate cancer (BRPC) have assessed the impact of non-hormonal agents on PSA kinetics. We have previously demonstrated that changes in PSA kinetics correlate with metastasis-free survival; however, it is unknown whether these changes also correlate with overall survival (OS). Methods We performed a combined retrospective analysis of 146 men with BRPC treated on phase-2 trials using one of four investigational drugs: lenalidomide (n=60), marimastat (n=39), ATN-224 (n=22), and imatinib (n=25). We examined factors influencing OS, including within-subject changes in PSA kinetics (PSA slope, PSA doubling time, and PSA velocity) before and 6 months after treatment initiation. Results After a median follow up of 83.1 months, 49 of 146 men had died. In univariate Cox regression analysis, two factors were associated with OS: baseline PSA velocity and change in PSA velocity on therapy. In a landmark multivariable model, stratified by study (which controlled for age, Gleason score, type of local therapy, and use of ADT prior to metastases), baseline PSA velocity and increase in PSA velocity on therapy remained independent predictors of OS. Median OS for men with an increase in PSA velocity on treatment was 115.4 months and was not reached for men with a decrease in PSA velocity (HR=0.47, 95% CI 0.25 to 0.88; P=0.02). Conclusions This hypothesis-generating study suggests that within-subject changes in PSA velocity after initiation of non-hormonal therapy may correlate with OS in men with BRPC. If validated in prospective trials, change in PSA velocity may represent a reasonable intermediate endpoint for screening new agents in these patients.
Collapse
Affiliation(s)
- D L Suzman
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA
| | - X C Zhou
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA
| | - M L Zahurak
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA
| | - J Lin
- Kimmel Cancer Center at Thomas Jefferson University Hospital, Philadelphia, PA, USA
| | - E S Antonarakis
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA
| |
Collapse
|
14
|
Schweizer MT, Zhou XC, Wang H, Yang T, Shaukat F, Partin AW, Eisenberger MA, Antonarakis ES. Metastasis-free survival is associated with overall survival in men with PSA-recurrent prostate cancer treated with deferred androgen deprivation therapy. Ann Oncol 2013; 24:2881-6. [PMID: 23946329 DOI: 10.1093/annonc/mdt335] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Clinical trials in men with biochemically recurrent prostate cancer (BRPC) have been hampered by long survival times, making overall survival (OS) a difficult end point to reach. Intermediate end points are needed in order to conduct such trials within a more feasible time frame. PATIENTS AND METHODS This is a retrospective analysis of 450 men with BRPC following prostatectomy treated at a single institution between 1981 and 2010, of which 140 developed subsequent metastases. Androgen deprivation therapy (ADT) was deferred until after the development of metastases. Cox regression models were developed to investigate factors influencing OS. RESULTS Median metastasis-free survival (MFS) was 10.2 years [95% confidence interval (CI) 7.6-14.0 years]; median OS after metastasis was 6.6 years (95%CI 5.8-8.4 years). Multivariable Cox regressions identified four independently prognostic variables for OS: MFS (HR 0.77; 95% CI 0.63-0.94), number of metastases (≤3 versus ≥4; HR 0.50; 95% CI 0.29-0.85), pain (absent versus present; HR 0.43; 95% CI 0.25-0.72), and bisphosphonate use (yes versus no; HR 0.60; 95% CI 0.37-0.98). CONCLUSIONS MFS emerged as an independent predictor of OS in men with BRPC treated with deferred ADT after the development of metastases. MFS may be a reasonable intermediate end point in future clinical trials. This observation requires prospective validation.
Collapse
|
15
|
Zhang YM, Zhou XC, Xu Z, Tang CJ. Meta-analysis of epidemiological studies of association of two polymorphisms in the interleukin-10 gene promoter and colorectal cancer risk. Genet Mol Res 2012; 11:3389-97. [PMID: 23079832 DOI: 10.4238/2012.september.25.7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
In order to make a comprehensive assessment of the potential association between two genetic variants in the IL-10 gene promoter, -1082 A>G (rs1800896) and -592 C>A (rs1800872), and colorectal cancer (CRC) risk, we conduced a meta-analysis of seven epidemiological studies, which included 1469 colorectal cancer cases and 2566 controls. Neither of the two polymorphisms had any association with increased CRC risk in overall population [for rs1800896: odds ratio (OR) = 0.90, 95% confidence interval (95%CI) = 0.76-1.06 in the dominant model and for rs1800872: OR = 1.06, 95%CI = 0.91-1.23 in the dominant model]. In subgroup analysis of the rs1800896 polymorphism, the results did not change when the analyses were restricted to individual studies, or those fulfilling Hardy-Weinberg equilibrium, or according to the source of controls. For rs1800872, however, when stratifying by the source of controls, the A allele had a significant increased risk of CRC among studies with population-based controls in the codominant model (AC vs CC: OR = 1.30, 95%CI = 1.04-1.63) and dominant model (AA/AC vs CC: OR = 1.25, 95% CI = 1.01-1.55). Based on this meta-analysis, we conclude that the IL-10 rs1800872 polymorphism could be a risk factor for CRC development among European populations. However, we found no association between the IL-10 rs1800896 polymorphism and CRC risk. Further studies, either with larger sample size or involving other SNPs and haplotypes of the IL-10 gene, are necessary to clarify the contribution of IL-10 genetic variations in colorectal carcinogenesis.
Collapse
Affiliation(s)
- Y M Zhang
- Department of Oncology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | | | | | | |
Collapse
|
16
|
Li ZF, Xia XC, Zhou XC, Niu YC, He ZH, Zhang Y, Li GQ, Wan AM, Wang DS, Chen XM, Lu QL, Singh RP. Seedling and Slow Rusting Resistance to Stripe Rust in Chinese Common Wheats. Plant Dis 2006; 90:1302-1312. [PMID: 30780937 DOI: 10.1094/pd-90-1302] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Identification of seedling and slow stripe rust resistance genes is important for gene pyramiding, gene deployment, and developing slow-rusting wheat cultivars to control the disease. A total of 98 Chinese lines were inoculated with 26 pathotypes of Puccinia striiformis f. sp. tritici for postulation of stripe rust resistance genes effective at the seedling stage. A total of 135 wheat lines were planted at two locations to characterize their slow rusting responses to stripe rust in the 2003-2004 and 2004-2005 cropping seasons. Genes Yr2, Yr3a, Yr4a, Yr6, Yr7, Yr9, Yr26, Yr27, and YrSD, either singly or in combinations, were postulated in 72 lines, whereas known resistance genes were not identified in the other 26 accessions. The resistance genes Yr9 and Yr26 were found in 42 and 19 accessions, respectively. Yr3a and Yr4a were detected in two lines, and four lines may contain Yr6. Three lines were postulated to possess YrSD, one carried Yr27, and one may possess Yr7. Thirty-three lines showed slow stripe rusting resistance at two locations in both seasons.
Collapse
Affiliation(s)
- Z F Li
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, 100081, Beijing, China
| | - X C Xia
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, 100081, Beijing, China
| | - X C Zhou
- Gansu Winter Wheat Research Institute, Duan Jia Tan 418, 730020, Lanzhou, China
| | - Y C Niu
- Plant Protection Institute, Chinese Academy of Agricultural Science, Yuanmingyuan West Road 2, 100094, Beijing, China
| | - Z H He
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, and International Maize and Wheat Improvement Center (CIMMYT) China Office, C/O CAAS, Zhongguancun South Street 12, 100081, Beijing, China
| | - Y Zhang
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - G Q Li
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - A M Wan
- Plant Protection Institute, Chinese Academy of Agricultural Science
| | - D S Wang
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - X M Chen
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - Q L Lu
- Gansu Winter Wheat Research Institute
| | - R P Singh
- CIMMYT, Apdo. Postal 6-641, 06600, Mexico D.F., Mexico
| |
Collapse
|
17
|
Abstract
We investigated the possible role of Hsp70-2 in germ cell apoptosis induced by heat stress in monkey unilateral cryptorchid testis. The study focused on in situ analysis of the testicular cell DNA fragmentation and on the possible relationship between Hsp70-2 expression and germ cell apoptosis. The TUNEL result showed that most of the germ cells were labeled in the cryptorchid testis on d 5 after induction of cryptorchidism; that with most of the apoptotic germ cells depleted, only a few germ cells were labeled on d 10; and that almost no apoptotic signal was observed in the cryptorchid testis on d 15 and thereafter. This indicates that the increasing germ cell degeneration in cryptorchid testis may take the form of apoptosis. Using in situ hybridization, immunohistochemistry, and Northern blot, we examined the changes of Hsp70-2 expression in the monkey cryptorchid testis. The level of Hsp70-2 mRNA decreased slightly, while the expression of HSP70-2 protein was almost unchanged at the early stage of germ cell apoptosis in the cryptorchid testis on d 5 and dropped dramatically along with the loss of apoptotic germ cells in the cryptorchid testis on d 10 after operation. It is therefore suggested that Hsp70-2 might not take part in inhibiting the apoptosis of germ cells at the early stage during operation-induced cryptorchid testis, and that Hsp70-2 gene does not belong to the immediate early related gene responsible for germ cell apoptosis induced by heat stress.
Collapse
Affiliation(s)
- X C Zhou
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing
| | | | | | | | | |
Collapse
|
18
|
Zhou XC, Wei P, Hu ZY, Gao F, Zhou RJ, Liu YX. Role of Fas/FasL genes in azoospermia or oligozoospermia induced by testosterone undecanoate in rhesus monkey. Acta Pharmacol Sin 2001; 22:1028-33. [PMID: 11749796] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
AIM To investigate role of apoptosis related genes Fas/FasL in azoospermia or oligozoospermia induced by testosterone undecanoate. METHODS TUNEL was used to detect the apoptotic signal of testicular cells. Immunohistochemistry and Western blot were used to quantitatively or qualitatively analyze the expression of these apoptosis-related proteins. RESULTS After injection of testosterone undecanoate, both the apoptotic signal in germ cells and the expression of Fas/FasL in testis increased correlatively in a time-dependent manner, reaching a maximum level on day 30. CONCLUSION Fas system may initiate and regulate the germ cell apoptosis induced by testosterone undecanoate.
Collapse
Affiliation(s)
- X C Zhou
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China
| | | | | | | | | | | |
Collapse
|
19
|
Feng WW, Zhou XC, Bai HB, Zheng XX. [Hippocampal slice - a model in vitro for screening antiepileptic drugs]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2001; 17:302-304. [PMID: 21189642] [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: 05/30/2023]
Abstract
AIM To establish a model in vitro for screening antiepileptic drugs. METHODS Perfusing guinea pig hippocampal slice with penicillin offers a stable epileptiform discharge which was tested by two commonly clinically used antiepileptic drugs, phenytoin sodium and phenobarbital sodium at different concentration. RESULTS The experimental result showed that penicillin induced epileptiform discharge in the hippocampal slice and two antiepileptic drugs, phenytoin sodium and phenobarbital sodium inhibition of this discharge induced by penicillin. CONCLUSION This electrophysiological model has the advantage of simplicity, flexibility and ease of quantitation and has potential value for screen antiepileptic drugs and epilepsy research.
Collapse
Affiliation(s)
- W W Feng
- Department of Life Science & Biomedical Science, Zhejiang University, Hangzhou 310027, China
| | | | | | | |
Collapse
|
20
|
Karuman P, Gozani O, Odze RD, Zhou XC, Zhu H, Shaw R, Brien TP, Bozzuto CD, Ooi D, Cantley LC, Yuan J. The Peutz-Jegher gene product LKB1 is a mediator of p53-dependent cell death. Mol Cell 2001; 7:1307-19. [PMID: 11430832 DOI: 10.1016/s1097-2765(01)00258-1] [Citation(s) in RCA: 242] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Here, we investigate the mechanism and function of LKB1, a Ser/Thr kinase mutated in Peutz-Jegher syndrome (PJS). We demonstrate that LKB1 physically associates with p53 and regulates specific p53-dependent apoptosis pathways. LKB1 protein is present in both the cytoplasm and nucleus of living cells and translocates to mitochondria during apoptosis. In vivo, LKB1 is highly upregulated in pyknotic intestinal epithelial cells. In contrast, polyps arising in Peutz-Jegher patients are devoid of LKB1 staining and have reduced numbers of apoptotic cells. We propose that a deficiency in apoptosis is a key factor in the formation of multiple benign intestinal polyps in PJS patients, and possibly for the subsequent development of malignant tumors in these patients.
Collapse
Affiliation(s)
- P Karuman
- Department of Cell Biology, Harvard Medical School, 02115, Boston, MA, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Gao F, Xu FH, Zhou XC, Han XB, Liu YX. Mifepristone regulates expression of apoptosis related genes Fas and FasL in mouse endometrium. Acta Pharmacol Sin 2001; 22:524-9. [PMID: 11747759] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
AIM To investigate the anti-implantation mechanism of mifepriston. METHODS In situ hybridization and immunohistochemistry were applied to determine mRNA and protein. RESULTS After mifepriston injection, the number of implantation sites were obviously reduced, mifepriston could inhibit the embryo implantation in mouse. The expression of apoptosis related genes, Fas and FasL, in mouse endometrium was also decreased after mifepriston treatment. CONCLUSION The expression of apoptosis related genes Fas and FasL is regulated by mifepriston and the inhibitory effect of mifepriston on the embryo implantation may be mediated by action on the Fas/FasL system.
Collapse
Affiliation(s)
- F Gao
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China
| | | | | | | | | |
Collapse
|
22
|
Abstract
To investigate the role of Hsp70-2 gene in germ cell apoptosis induced by heat stress, its expression changes were examined in rat normal and unilateral cryptorchid testes by using in situ hybridization, immunohistochemistry, and northern blot analysis techniques. The results showed that the expression level of Hsp70-2 gene declined slightly at the early stage of germ cell apoptosis, and dropped dramatically when most of the germ cells were undergoing apoptosis on day 7.5 after the induction of cryptorchidism. This report suggests for the first time that Hsp70-2 gene might not inhibit the apoptosis of germ cells at the early stage in cryptorchid testes. Hsp70-2 gene does not belong to the immediate early related genes that are responsible for germ cell apoptosis induced by heat stress.
Collapse
Affiliation(s)
- C X Guo
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing
| | | | | | | |
Collapse
|
23
|
Cao L, Zhou XC, Li SF. Enantioselective sensor based on microgravimetric quartz crystal microbalance with molecularly imprinted polymer film. Analyst 2001; 126:184-8. [PMID: 11235101 DOI: 10.1039/b005750i] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a novel quartz crystal microbalance sensor that provides enantioselectivity to dansylphenylalanine enantiomers by using a molecularly imprinted polymer film as a recognition element. The polymeric recognition thin film, imprinted with chiral dansyl-L-phenylalanine, was immobilised on a gold electrode modified with a photoactive precursor monolayer via a self-assembly process using photopolymerization. The fabricated sensor was able to discriminate between L- and D-dansylphenylalanine enantiomers in solution owing to the enantioselectivity of the imprinted sites. The enantiomeric composition of L- and D-enantiomeric mixtures could be quantitatively determined by the fabricated sensor. The detection limit is 5 micrograms mL-1 with a response range of 5-500 micrograms mL-1 at pH 10.0. The influence of the template concentration on the sensitivity and selectivity of the synthesised polymer membranes was investigated and optimised. The surface characteristics of the polymer coating were studied by varying the pH value of the buffer solution, and a convenient regeneration process was proposed to increase the reproducibility and reusability of the sensor by flushing with pH 2.0 buffer. The selectivity and recognition mechanism of the imprinted polymer film were studied with compounds that are structurally related to the template. The method presented in this work provides a novel means of preparing highly selective and sensitive chemical sensors via self-assembly and molecularly imprinting techniques.
Collapse
Affiliation(s)
- L Cao
- Department of Chemistry, National University of Singapore, Singapore 119260, Republic of Singapore.
| | | | | |
Collapse
|
24
|
Zhou XC, Huang LQ, Li SF. Microgravimetric DNA sensor based on quartz crystal microbalance: comparison of oligonucleotide immobilization methods and the application in genetic diagnosis. Biosens Bioelectron 2001; 16:85-95. [PMID: 11261857 DOI: 10.1016/s0956-5663(00)00136-6] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We report on the study of immobilization DNA probes onto quartz crystal oscillators by self-assembly technique to form variety types of mono- and multi-layered sensing films towards the realization of DNA diagnostic devices. A 18-mer DNA probe complementary to the site of genetic beta-thalassaemia mutations was immobilized on the electrodes of QCM by covalent bonding or electrostatic adsorption on polyelectrolyte films to form mono- or multi-layered sensing films by self-assembled process. Hybridization was induced by exposure of the QCMs immobilized with DNA probe to a test solution containing the target nucleic acid sequences. The kinetics of DNA probe immobilization and hybridization with the fabricated DNA sensors were studied via in-situ frequency changes. The characteristics of QCM sensors containing mono- or multi-layered DNA probe constructed by direct chemical bonding, avidin-biotin interaction or electrostatic adsorption on polyelectrolyte films were compared. Results indicated that the DNA sensing films fabricated by immobilization of biotinylated DNA probe to avidin provide fast sensor response and high hybridization efficiencies. The effects of ionic strength of the buffer solution and the concentration of target nucleic acid used in hybridization were also studied. The fabricated DNA biosensor was used to detect a set of real samples. We conclude that the microgravimetric DNA sensor with its direct detection of amplified products provide a rapid, low cost and convenient diagnostic method for genetic disease.
Collapse
Affiliation(s)
- X C Zhou
- Institute of Materials Research and Engineering, Singapore, Singapore.
| | | | | |
Collapse
|
25
|
Zhou XC, Cao L. High sensitivity microgravimetric biosensor for qualitative and quantitative diagnostic detection of polychlorinated dibenzo-p-dioxins. Analyst 2001; 126:71-8. [PMID: 11205517 DOI: 10.1039/b006221i] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A piezoelectric immunosensor system was developed for the rapid detection of polychlorinated dibenzo-p-dioxins (PCDDs). The system uses a competitive inhibition enzyme immunoassay (EIA) based on a mouse monoclonal antibody that is specific for 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) and a conjugate of a dioxin-like competitor coupled to the enzyme horseradish peroxidase (HRP). The anti-dioxin antibody was deposited on a 10 MHz AT-cut quartz crystal resonator modified with a self-assembly monolayer of dithiobis-N-succinimidyl propionate. PCDDs at different concentrations in the range 0.001-10 ng mL-1 were mixed with a constant amount of HRP-conjugated competitor. The frequency responses due to the adsorption of the mixed samples on the biosensor surface were measured. The results show that 2,3,7,8-TCDD can be quantitatively detected with the developed immunosensor in the concentration range 0.01-1.3 ng mL-1. Cross-reactivities of the biosensor to various PCDD congeners were also investigated. The sensitivity and selectivity of the quartz crystal microbalance (QCM) biosensor is comparable to EIA and ELISA methods in the detection of polychlorinated dibenzo-p-dioxins. The developed QCM immunosensing system offers significant improvements in speed, sample throughout and cost for the qualitative and quantitative detection of PCDDs compared with GC-MS.
Collapse
Affiliation(s)
- X C Zhou
- Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602, Republic of Singapore.
| | | |
Collapse
|
26
|
Zhang JL, Choe H, Dezube BJ, Farzan M, Sharma PL, Zhou XC, Chen LB, Ono M, Gillies S, Wu Y, Sodroski JG, Crumpacker CS. The bis-azo compound FP-21399 inhibits HIV-1 replication by preventing viral entry. Virology 1998; 244:530-41. [PMID: 9601521 DOI: 10.1006/viro.1998.9115] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [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] [Indexed: 11/22/2022]
Abstract
The bis-azo compound FP-21399 inhibits HIV-1 infection. We now show that FP-21399 acts on the HIV-1 envelope glycoprotein to prevent viral replication. This compound targets the entry step of the HIV-1 replication cycle as demonstrated by time-of-addition and single cycle viral entry assays. The entry of SIVmac239, which uses the same coreceptors (CD4/CCR5) as HIV-1, was not inhibited by FP-21399, indicating that the antiviral effect of FP-21399 is specific for the HIV-1 envelope glycoprotein and is not dependent upon the cellular receptors CD4 and CCR5. FP-21399 inhibits neither the activity of HIV-1 reverse transcriptase nor the expression of HIV-1 early mRNA. Finally, this compound inhibits gp120 shedding of the T-tropic virus. Our results suggest that the anti-HIV activity of FP-21399 is due to its interaction with HIV-1 gp120/41 complex during viral entry.
Collapse
MESH Headings
- Animals
- Anti-HIV Agents/pharmacology
- Base Sequence
- Chlorobenzenes/pharmacology
- DNA Primers/genetics
- Gene Expression/drug effects
- HIV Envelope Protein gp120/metabolism
- HIV Envelope Protein gp41/metabolism
- HIV Infections/prevention & control
- HIV-1/drug effects
- HIV-1/genetics
- HIV-1/physiology
- Humans
- In Vitro Techniques
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/virology
- Membrane Fusion/drug effects
- Naphthalenes/pharmacology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Viral/genetics
- RNA, Viral/metabolism
- Receptors, CCR5/drug effects
- Receptors, CCR5/physiology
- Receptors, CXCR4/drug effects
- Receptors, CXCR4/physiology
- Simian Acquired Immunodeficiency Syndrome/prevention & control
- Simian Immunodeficiency Virus/drug effects
- Simian Immunodeficiency Virus/pathogenicity
- Virus Replication/drug effects
Collapse
Affiliation(s)
- J L Zhang
- Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Li LC, Zhang X, Zhou SW, Zhou XC, Yang WM, Zhang YS. Experience with repair of hypospadias using bladder mucosa in adolescents and adults. J Urol 1995; 153:1117-9. [PMID: 7869477] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
From July 1984 to January 1994, 113 hypospadias operations were performed using a free bladder mucosa graft. There were 31 primary cases and 82 secondary cases in which prior operations had been done. The meatus was penile in 33 patients, penoscrotal in 72 and perineal in 8. The cosmetic and functional results were satisfactory. Postoperative complications included 8 fistulas that required closure and 6 cases of stenosis treated by dilation. Our results suggest that hypospadias repair with a bladder mucosa graft is feasible and reliable. The technique has been performed successfully in the most complex as well as simple cases in adults and adolescents.
Collapse
Affiliation(s)
- L C Li
- Department of Urology, Tongji Hospital, Tongji Medical University, Wuhan, China
| | | | | | | | | | | |
Collapse
|
28
|
Zhang X, Ouyang JZ, Zhang YS, Tayalla B, Zhou XC, Zhou SW. Effect of the extracts of pumpkin seeds on the urodynamics of rabbits: an experimental study. J Tongji Med Univ 1994; 14:235-8. [PMID: 7760436 DOI: 10.1007/bf02897676] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Pumpkin seeds were prepared into oil n-butyle alcohol and ether extracts. The effects of the three extracts on the urodynamics of rabbits were observed. It was concluded that the oil preparation could remarkably reduce the bladder pressure, increase the bladder compliance, reduce the urethral pressure. Other two kinds of preparations had no effect in this experimental. The mechanisms of the effect of oil preparation on the urodynamics and the prospect of clinical use was discussed.
Collapse
Affiliation(s)
- X Zhang
- Department of Urology, Tongji Hospital, Tongji Medical University, Wuhan
| | | | | | | | | | | |
Collapse
|