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Meng XB, Li Y, Gao ZH, Wang CJ, Gu YM. Comparison of urinary incontinence following three different prostate apex disconnection techniques in transurethral thulium laser prostatectomy. Eur Rev Med Pharmacol Sci 2024; 28:2396-2402. [PMID: 38567602 DOI: 10.26355/eurrev_202403_35746] [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: 04/04/2024]
Abstract
OBJECTIVE This study investigates the incidence of urinary incontinence following transurethral thulium laser prostatectomy with three different prostate apex disconnection techniques: semi-separation, pre-separation, and post-separation. The findings aim to provide references for clinical treatment. PATIENTS AND METHODS A retrospective analysis was conducted on 74 patients treated with transurethral thulium laser prostatectomy for prostatic hyperplasia from April 2022 to March 2023. Complete clinical and follow-up data were available for 52 patients. Clinical and follow-up data were collected for these patients. A comparison was made of urinary incontinence following the three different types of prostate apex disconnection in transurethral thulium laser prostatectomy. RESULTS In this study, the immediate postoperative urinary incontinence rate for transurethral thulium laser prostatectomy was 9.62% (5/52), the short-term incontinence rate was 11.54% (5/52), and the long-term incontinence rate was 9.62% (5/52). The immediate postoperative incontinence rates for semi-separation, pre-separation, and post- separation were 8.33% (1/12), 8.33% (2/24), and 12.5% (2/16), respectively. The short-term incontinence rates for semi-separation, pre-separation, and post-separation were 8.33% (1/12), 8.33% (2/24), and 18.75% (3/16), respectively. The long-term incontinence rates for semi-separation, pre-separation, and post-separation were 8.33% (1/12), 8.33% (2/24), and 12.5% (2/16), respectively. CONCLUSIONS The incidence of urinary incontinence following transurethral thulium laser prostatectomy was lower with semi-separation and pre-separation compared to post-separation.
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Affiliation(s)
- X-B Meng
- Department of Urology, Peking University First Hospital - MiYun Hospital, Beijing, China.
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Liu HL, Gao WZ, Han YJ, Gao ZH, Diao MX, Zuo C, Zhang MH, Diao YZ, Wang CJ, Gu YM, Wang B. Analysis of risk factors for stone remnants and recurrence after lateral decubitus percutaneous nephrolithotomy. Eur Rev Med Pharmacol Sci 2023; 27:11913-11922. [PMID: 38164855 DOI: 10.26355/eurrev_202312_34790] [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: 01/03/2024]
Abstract
OBJECTIVE This study aims to explore the risk factors for stone remnants and recurrence after lateral decubitus percutaneous nephrolithotomy (PCNL), providing insights to enhance the stone-free rate and reduce the stone recurrence rate. PATIENTS AND METHODS A retrospective analysis was conducted on 356 patients with renal or upper ureteral stones who underwent lateral decubitus PCNL from January 2015 to August 2022. Among them, 271 patients had complete clinical and follow-up data. General clinical information, perioperative data, and follow-up data were collected. Univariate and multivariate logistic regression analyses were performed to identify risk factors for stone remnants and recurrence after lateral decubitus PCNL. RESULTS The stone-free rate after lateral decubitus PCNL was 88.6% (195/271), and the stone recurrence rate within three years was 28.1% (76/271). Stone size (p<0.001) and stone co-infection (p=0.047) were identified as independent risk factors for stone remnants after lateral decubitus PCNL. Multiple stones (p=0.003) were an independent risk factor for stone recurrence after lateral decubitus PCNL. CONCLUSIONS Stone size and stone co-infection are independent risk factors for stone remnants after lateral decubitus PCNL. Multiple stones are an independent risk factor for stone recurrence after lateral decubitus PCNL.
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Affiliation(s)
- H-L Liu
- Department of Urology, Peking University First Hospital, Miyun Hospital, Beijing, China.
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Liu JJ, Xu XX, Sun LJ, Yuan CX, Kaneko K, Sun Y, Liang PF, Wu HY, Shi GZ, Lin CJ, Lee J, Wang SM, Qi C, Li JG, Li HH, Xayavong L, Li ZH, Li PJ, Yang YY, Jian H, Gao YF, Fan R, Zha SX, Dai FC, Zhu HF, Li JH, Chang ZF, Qin SL, Zhang ZZ, Cai BS, Chen RF, Wang JS, Wang DX, Wang K, Duan FF, Lam YH, Ma P, Gao ZH, Hu Q, Bai Z, Ma JB, Wang JG, Wu CG, Luo DW, Jiang Y, Liu Y, Hou DS, Li R, Ma NR, Ma WH, Yu GM, Patel D, Jin SY, Wang YF, Yu YC, Hu LY, Wang X, Zang HL, Wang KL, Ding B, Zhao QQ, Yang L, Wen PW, Yang F, Jia HM, Zhang GL, Pan M, Wang XY, Sun HH, Xu HS, Zhou XH, Zhang YH, Hu ZG, Wang M, Liu ML, Ong HJ, Yang WQ. Observation of a Strongly Isospin-Mixed Doublet in ^{26}Si via β-Delayed Two-Proton Decay of ^{26}P. Phys Rev Lett 2022; 129:242502. [PMID: 36563237 DOI: 10.1103/physrevlett.129.242502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 10/10/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
β decay of proton-rich nuclei plays an important role in exploring isospin mixing. The β decay of ^{26}P at the proton drip line is studied using double-sided silicon strip detectors operating in conjunction with high-purity germanium detectors. The T=2 isobaric analog state (IAS) at 13 055 keV and two new high-lying states at 13 380 and 11 912 keV in ^{26}Si are unambiguously identified through β-delayed two-proton emission (β2p). Angular correlations of two protons emitted from ^{26}Si excited states populated by ^{26}P β decay are measured, which suggests that the two protons are emitted mainly sequentially. We report the first observation of a strongly isospin-mixed doublet that deexcites mainly via two-proton decay. The isospin mixing matrix element between the ^{26}Si IAS and the nearby 13 380-keV state is determined to be 130(21) keV, and this result represents the strongest mixing, highest excitation energy, and largest level spacing of a doublet ever observed in β-decay experiments.
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Affiliation(s)
- J J Liu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X X Xu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Department of Physics, The University of Hong Kong, Hong Kong, China
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
| | - L J Sun
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - C X Yuan
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
| | - K Kaneko
- Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503, Japan
| | - Y Sun
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - P F Liang
- Department of Physics, The University of Hong Kong, Hong Kong, China
| | - H Y Wu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - G Z Shi
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - C J Lin
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
- College of Physics and Technology & Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, Guilin 541004, China
| | - J Lee
- Department of Physics, The University of Hong Kong, Hong Kong, China
| | - S M Wang
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
- Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai 200438, China
| | - C Qi
- KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
| | - J G Li
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H H Li
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Latsamy Xayavong
- Department of Physics, Faculty of Natural Sciences, National University of Laos, Vientiane 01080, Laos
| | - Z H Li
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - P J Li
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Y Y Yang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H Jian
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Y F Gao
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - R Fan
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - S X Zha
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - F C Dai
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - H F Zhu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - J H Li
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Z F Chang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - S L Qin
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Z Z Zhang
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
| | - B S Cai
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
| | - R F Chen
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J S Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- College of Science, Huzhou University, Huzhou 313000, China
| | - D X Wang
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - K Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - F F Duan
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Y H Lam
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - P Ma
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Z H Gao
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Q Hu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Z Bai
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J B Ma
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J G Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - C G Wu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - D W Luo
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Y Jiang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Y Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - D S Hou
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - R Li
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - N R Ma
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - W H Ma
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
| | - G M Yu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - D Patel
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Department of Physics, Sardar Vallabhbhai National Institute of Technology, Surat 395007, India
| | - S Y Jin
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Y F Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Physics and Astronomy, Yunnan University, Kunming 650091, China
| | - Y C Yu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Physics and Astronomy, Yunnan University, Kunming 650091, China
| | - L Y Hu
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - X Wang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - H L Zang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - K L Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - B Ding
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Q Q Zhao
- Department of Physics, The University of Hong Kong, Hong Kong, China
| | - L Yang
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - P W Wen
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - F Yang
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - H M Jia
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - G L Zhang
- School of Physics, Beihang University, Beijing 100191, China
| | - M Pan
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
- School of Physics, Beihang University, Beijing 100191, China
| | - X Y Wang
- School of Physics, Beihang University, Beijing 100191, China
| | - H H Sun
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - H S Xu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
| | - X H Zhou
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
| | - Y H Zhang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
| | - Z G Hu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
| | - M Wang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516003, China
| | - M L Liu
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H J Ong
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- RCNP, Osaka University, Osaka 567-0047, Japan
| | - W Q Yang
- CAS Key Laboratory of High Precision Nuclear Spectroscopy, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Li S, Yao TQ, Wang HF, Wen XW, Lin H, Gao ZH, Zhang Q, Mo Y, Tang D, Cheng Y, Liu XB, Shen JH. [Two-dimensional equivalent mechanical modeling and finite element analysis of normal female pelvic floor system]. Zhonghua Yi Xue Za Zhi 2022; 102:2189-2195. [PMID: 35872583 DOI: 10.3760/cma.j.cn112137-20211108-02478] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To construct the geometric model of the pelvic floor by a two-dimensional equivalent mechanics method, and to explore the effect of the shape and position of pelvic floor organs and tissues on the biomechanical properties of the pelvic floor under different abdominal pressure. Methods: A 28-year-old healthy and symmetrical married infertile female volunteer was included. The pelvic floor tissue was scanned in the supine position using a 3.0T magnetic resonance scanner (Philips Company, Holland). Based on the method of magnetic resonance imaging (MRI) two-dimensional parameter measurement and computer aided design, the geometric model and finite element model of the female pelvic floor were established, and the biomechanical characteristics of the pelvic floor support system under different abdominal pressure were analyzed. Results: In this study, four different working conditions of the pelvic floor force were simulated under 60, 99, 168, and 208 cmH2O (1 cmH2O=0.098 kPa) abdominal pressure loads. The trend was as follows: under the abdominal pressure load, the retrograde flexion of the uterus occurred, the cervical, the middle and upper vaginal segment and the levator anus muscle had the characteristic change of mechanical axial direction pointing to the sacrum and coccyx, and the deformation of the levator anus muscle in the horizontal direction was greater than that in the vertical direction. With the increase of the abdominal pressure, the maximum stress values of the pelvic floor whole system of healthy subjects under four different working conditions were 0.194 3, 0.389 6, 0.557 1, and 0.627 5 MPa, respectively, and the maximum displacement values were 10, 14, 21 and 25 mm, respectively. The maximum stress values of the cervical and vaginal middle and upper segment were 0.111 7, 0.161 8, 0.250 6, and 0.304 1 MPa, respectively, and the maximum displacement values were 3, 6, 9, and 11 mm, respectively. The maximum stress of the perineal body was 0.063 4, 0.119 6, 0.235 2, and 0.288 0 MPa, and the maximum displacement was 1, 2, 4, and 5 mm. The maximum stress values of the levator anus muscle were 0.194 3, 0.389 6, 0.557 1, and 0.627 5 MPa, and the maximum displacement values were 2, 4, 7, and 8 mm, respectively. The maximum stress and maximum displacement of pelvic organs increased with the increase of the abdominal pressure under different working conditions. The stress axial relationship of normal female pelvic floor was that the middle and upper segment of uterus and vagina mainly acted on the sacrococcyx and the levator anus muscle, and the lower vaginal segment acts on the perineal body. Conclusions: The two-dimensional equivalent mechanical modeling and finite element analysis of the female pelvic floor system can accurately reflect the biomechanical characteristics of the female pelvic floor, and the resultant stress direction of the pelvic organs points to the sacrum and coccyx. The sacrum and coccyx, levator anus and perineal body play important stress supporting roles in the pelvic floor system.
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Affiliation(s)
- S Li
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - T Q Yao
- School of Mechanical and Electric Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - H F Wang
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - X W Wen
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - H Lin
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Z H Gao
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Q Zhang
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Y Mo
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - D Tang
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Y Cheng
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - X B Liu
- School of Mechanical and Electric Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - J H Shen
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
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Brailovskaia J, Zhang XC, Cai D, Lu S, Gao ZH, Margraf J. The Benefits of Physical Activity and Positive Mental Health for Reducing the Burden of COVID-19: Validation from a Cross-sectional and Longitudinal Investigation in China and Germany. Int J Ment Health Addict 2021; 21:1186-1199. [PMID: 34602914 PMCID: PMC8475893 DOI: 10.1007/s11469-021-00653-5] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/14/2021] [Indexed: 11/29/2022] Open
Abstract
Many people experience high burden by the outbreak of the coronavirus disease (COVID-19) and its consequences for health and everyday life. The present cross-national study investigated potential factors that can reduce the burden by COVID-19 in China and Germany. Cross-sectional and longitudinal (China: N = 474, baseline, BL: 2015, follow-up, FU: 2020; Germany: N = 359, BL: 2019, FU: 2020) data on physical activity (e.g., jogging) (BL/FU), positive mental health (PMH) (BL/FU), and burden by COVID-19 (FU) were collected via online surveys. In both countries, physical activity was positively associated with PMH, and both variables were negatively related to burden by COVID-19. Furthermore, PMH mediated the link between physical activity and burden. The mediation model was significant when physical activity and PMH were assessed at the BL, while burden was measured at the FU; and it was also significant when all variables were assessed at the FU. The present findings reveal that physical activity in combination with PMH can reduce the experience of burden by COVID-19. Conscious fostering of physical activity and PMH is supported as an effective strategy to reduce the negative impact of the pandemic outbreak on mental and physical health. Additional benefits such as increased adherence to governmental measures around COVID-19 are discussed.
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Affiliation(s)
- J Brailovskaia
- Mental Health Research and Treatment Center, Department of Clinical Psychology and Psychotherapy, Ruhr-Universität Bochum, Massenbergstr. 9-13, 44787 Bochum, Germany
| | - X C Zhang
- Mental Health Research and Treatment Center, Department of Clinical Psychology and Psychotherapy, Ruhr-Universität Bochum, Massenbergstr. 9-13, 44787 Bochum, Germany
| | - D Cai
- Department of Psychology, Shanghai Normal University, Shanghai, China
| | - S Lu
- Department of Psychology, Capital Normal University, Beijing, China
| | - Z H Gao
- School of Psychology and Mental Health, North China University of Science and Technology, Qinhuangdao, China
| | - J Margraf
- Mental Health Research and Treatment Center, Department of Clinical Psychology and Psychotherapy, Ruhr-Universität Bochum, Massenbergstr. 9-13, 44787 Bochum, Germany
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Li ZL, An CM, Gao ZH, Cao JZ, Huangfu H, Nan J, Zhu BY, Zhang Y. [Prognostic value of the age-adjusted Charlson comorbidity index in patients over 60 years old with laryngeal squamous cell carcinoma]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:837-843. [PMID: 34521168 DOI: 10.3760/cma.j.cn115330-20201124-00890] [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 evaluate the value of the age-adjusted Charlson comorbidity Index (ACCI) in predicting the prognosis and guiding the clinical treatment of laryngeal squamous cell carcinoma (LSCC) in patients over 60 years old. Methods: Retrospective analysis of 249 cases of LSCC in Shanxi Provincial Cancer Hospital and First Hospital of Shanxi Medical University from 2008 to 2015 was performed. There were 234 males and 15 females, aged from 60 to 88 years. The clinical characteristics, treatment information and follow-up data were collected. ACCI was used to score the comorbidities of the patients. Receiver operating characteristic (ROC) curve was drawn and the patients were divided into high ACCI group and low ACCI group according to the cut-off value of ACCI. Prognostic factors were analyzed. Kaplan-Meier method was used for survival analysis, rank sum test was used for comparison between groups, χ2 test was used for enumeration data. Results: Overall survival (OS) was 54.6%, progression-free survival (PFS) was 59.4%, and cancer-specific survival (CSS) was 58.6%. Both the median survival time and PFS time were 60 months. The best cutoff point of the ACCI group was 5. Cox multivariate analysis showed that ACCI was an independent risk factor for OS, PFS and CSS (OR=1.553, 1.499 and 1.534,respectively, all P<0.05). In the high ACCI group, OS (χ2=4.120 and 4.115,P<0.05) and CSS (χ2=4.510 and 5.009,P<0.05) of patients treated with surgery plus radiotherapy and patients with radiotherapy alone were better than those of patients with surgery alone (P<0.05). But in the low ACCI group, there was no significant difference in prognosis among the three treatment regimens (P>0.05). Conclusion: High ACCI offors important prognostic information for LSCC in patients over 60 years old, and can guide clinical treatment options.
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Affiliation(s)
- Z L Li
- Department of Head and Neck Surgery, Shanxi Provincial Cancer Hospital, Taiyuan 030013, China
| | - C M An
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Caner/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Z H Gao
- Department of Otorhinolaryngology, Head and Neck Surgery, First Hospital of Shanxi Medical University, Taiyuan 030012, China
| | - J Z Cao
- Department of Head and Neck Surgery, Shanxi Provincial Cancer Hospital, Taiyuan 030013, China
| | - H Huangfu
- Department of Otorhinolaryngology, Head and Neck Surgery, First Hospital of Shanxi Medical University, Taiyuan 030012, China
| | - J Nan
- Department of Head and Neck Surgery, Shanxi Provincial Cancer Hospital, Taiyuan 030013, China
| | - B Y Zhu
- Department of Head and Neck Surgery, Shanxi Provincial Cancer Hospital, Taiyuan 030013, China
| | - Y Zhang
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Caner/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Bai CQ, Ouyang J, Su CH, Cui QQ, Liu D, Gao ZH, Chen SY, Zhao YY. [Association of hyperuricemia-induced renal damage with sirtuin 1 and endothelial nitric oxide synthase in rats]. Zhonghua Yi Xue Za Zhi 2021; 101:429-434. [PMID: 33611893 DOI: 10.3760/cma.j.cn112137-20200620-01900] [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 investigate the association of hyperuricemia-induced renal damage with sirtuin 1 (SIRT1) and endothelial nitric oxide synthase (eNOS) in rats. Methods: Using the random number table method, 32 Sprague-Dawley rats were randomly divided into 4 groups: control group, model A group (the model was generated using oxonic acid potassium salt alone), model B group (hyperuricemia model was generated using oxonic acid potassium salt combined with uric acid) and resveratrol group, with 8 rats in each group. The experiment lasted 12 weeks. Serum uric acid and cystatin C levels were monitored regularly. In week 12, serum creatinine and urea nitrogen levels were measured, and the kidneys were extracted. The expression of SIRT1 and eNOS in renal tissues was measured and determined by immunohistochemistry, quantitative reverse-transcription polymerase chain reaction (RT-qPCR) and western blotting. Immunohistochemistry of alpha-smooth muscle actin combined with Masson staining was employed to evaluate the degree of renal fibrosis, and pathological changes were observed based on hematoxylin and eosin staining. Results: In week 12, the uric acid levels in both the model A and model B groups were higher than those in the control group [(316±43) μmol/L, (297±40) μmol/L vs (118±44) μmol/L, both P<0.05]. The levels of cystatin C in the model A, model B, and resveratrol groups were all higher than those in the control group [(156±20) ng/ml, (143±29) ng/ml, (128±26) ng/ml vs (62±18) ng/ml, all P<0.05]. Creatinine levels were higher in the model A and model B groups than those in the control group [(68.5±10.3) μmol/L, (64.5±13.9) μmol/L vs (43.2±10.6) μmol/L, both P<0.05]. The levels of uric acid, cystatin C and creatinine in the resveratrol group were lower than those in the model A group (all P<0.05). Immunohistochemistry, RT-qPCR, and Western blotting for renal SIRT1 and eNOS showed that the expression in the model A and model B groups was inhibited, while the expression in the resveratrol group was not significantly inhibited, compared with that in the control group. Microscopically, obvious abnormalities were not found in the renal tissue of the control group. Renal inflammatory cell aggregation and edema occurred, and interstitial fibrosis was obvious in both the model A and model B groups, while these lesions in the resveratrol group were significantly improved. Conclusions: Hyperuricemia may cause renal injury by inhibiting the expression of SIRT1 and eNOS.
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Affiliation(s)
- C Q Bai
- Department of Nephrology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - J Ouyang
- Endocrine Laboratory, Institute of Medicine, University of Zhengzhou, Zhengzhou 450000, China
| | - C H Su
- Department of Nephrology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Q Q Cui
- Department of Nephrology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - D Liu
- Department of Nephrology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Z H Gao
- Department of Nephrology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - S Y Chen
- Department of Nephrology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Y Y Zhao
- Department of Nephrology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
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8
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Liu Y, Ye YL, Lou JL, Yang XF, Baba T, Kimura M, Yang B, Li ZH, Li QT, Xu JY, Ge YC, Hua H, Wang JS, Yang YY, Ma P, Bai Z, Hu Q, Liu W, Ma K, Tao LC, Jiang Y, Hu LY, Zang HL, Feng J, Wu HY, Han JX, Bai SW, Li G, Yu HZ, Huang SW, Chen ZQ, Sun XH, Li JJ, Tan ZW, Gao ZH, Duan FF, Tan JH, Sun SQ, Song YS. Positive-Parity Linear-Chain Molecular Band in ^{16}C. Phys Rev Lett 2020; 124:192501. [PMID: 32469564 DOI: 10.1103/physrevlett.124.192501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/31/2020] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the linear-chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity linear-chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{2} configuration, according to the associated angular correlation and decay analysis. Other members of this band were found at 17.3, 19.4, and 21.6 MeV based on their selective decay properties, being consistent with the theoretical predictions. Another intriguing high-lying state was observed at 27.2 MeV which decays almost exclusively to ^{6}He+^{10}Be(∼6 MeV) final channel, corresponding well to another predicted linear-chain structure with the pure σ-bond configuration.
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Affiliation(s)
- Y Liu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Y L Ye
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J L Lou
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - X F Yang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - T Baba
- Kitami Institute of Technology, 090-8507 Kitami, Japan
| | - M Kimura
- Department of Physics, Hokkaido University, 060-0810 Sapporo, Japan
| | - B Yang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Z H Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Q T Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J Y Xu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Y C Ge
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - H Hua
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J S Wang
- School of Science, Huzhou University, Huzhou 313000, China
- Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China
| | - Y Y Yang
- Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China
| | - P Ma
- Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China
| | - Z Bai
- Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China
| | - Q Hu
- Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China
| | - W Liu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - K Ma
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - L C Tao
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Y Jiang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - L Y Hu
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - H L Zang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J Feng
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - H Y Wu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J X Han
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - S W Bai
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - G Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - H Z Yu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - S W Huang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Z Q Chen
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - X H Sun
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J J Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Z W Tan
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Z H Gao
- Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China
| | - F F Duan
- Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China
| | - J H Tan
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - S Q Sun
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Y S Song
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, China
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Sun ZH, Gao ZH, Xue JM, Wang XS, Song MT. [The efficacy of sublingual immunotherapy for allergic rhinitis and the predictive role of cytokines in its therapeutic effect]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:332-336. [PMID: 30970404 DOI: 10.13201/j.issn.1001-1781.2019.04.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Indexed: 06/09/2023]
Abstract
Objective:The study aimed to investigate the efficacy of sublingual immunotherapy(SLIT) in treatment of adult allergic rhinitis, and to explore the predictive role of baseline serum cytokine levels in its therapeutic effect.Method:Sixty patients with moderatesevere perennial AR sensitized with house dust mites were treated for 2 years. The SLIT group(n=30) were treated with standardized dust mite vaccine SLIT and conventional drugs, and the control group(n=30) were treated with placebo and conventional drugs. The combined symptom and medication score(CSMS) were compared between the two groups to evaluate the efficacy at baseline and 2 year endpoint. According to therapeutic effect, the SLIT group and the control group were divided into subgroups respectively, and the baseline IFN-γ and IL4, IL10, IL17 levels were compared between the effective group and the ineffective group in each group. The ROC curve was drawn to find the best predictive index and the best cut-off value was calculated. Result:①There was no significant difference between the SLIT group and the control group at baseline CSMS(P>0.05). There was significant difference between the two groups at 2year endpoint CSMS(P<0.05). ②In the SLIT group, there was no significant difference between the effective group and the ineffective group with the IFN-γ and IL17(P>0.05). The IL4 level in the effective group was significantly higher than the ineffective group while the IL10 level was significantly lower(P<0.05). In the control group, there were no significant differences in the levels of IFN-γ, IL4, IL10 and IL17 between the two subgroups(P>0.05). ③Baseline IL4/IL10 has higher predictive value than IL4 and IL10 alone. The best cut-off value is 2.04, and the sensitivity and specificity of predictive value were 72.7% and 73.7% respectively. Conclusion: SLIT combined with conventional drug therapy is more effective than conventional drug therapy alone. IL4/IL10 has a better predictive role in SLIT effect than IL4 or IL10 alone. The higher the ratio, the better therapeutic effect is.
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Affiliation(s)
- Z H Sun
- Shanxi Medical University, Taiyuan, 030001, China
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Song KY, Xu Y, Gao W, Hao WT, Yao JC, Wang L, Jiang H, Gao ZH, Wang XR, Wang BQ. [Features of cognitive function in patients with laryngeal carcinoma]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:1396-1399. [PMID: 30550170 DOI: 10.13201/j.issn.1001-1781.2018.18.008] [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: 04/18/2018] [Indexed: 11/12/2022]
Abstract
Objective:To study the differences in cognitive function between patients with laryngeal carcinoma and healthy volunteers. Method:Patients with laryngeal carcinoma who have been first diagnosed with laryngeal carcinoma, but not received treatment at the Department of Otolaryngology in two hospitals in Shanxi Province and healthy volunteers of the same age, gender-matched and similar education were studied for the purpose to evaluate the cognitive status by using the Wechsler memory scale.Result:No significant difference of age, gender and educational level was found between both groups(P>0.05).The score of Memory Quotient was significantly lower in the laryngeal carcinoma group than that in healthy control group (P<0.05). There were significant differences in the results of Wechsler memory scale except for Experience, Orientation and Association test (P<0.05).Conclusion:The memory, attention and computing power of patients in the laryngeal carcinoma group were not as good as those of patients in the healthy control group. Patients with laryngeal carcinoma have cognitive impairment or lower ability , so we need to pay more attention to the patients during their rehabilitation. The early detection of cancer-related cognitive impairments can help patients improve their cognitive function early, reduce the burden on their families and society, and promote better return of patients to society.
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Affiliation(s)
- K Y Song
- Shanxi Medical University, Taiyuan, 030001, China
| | - Y Xu
- Department of Psychiatry, the First Hospital, Shanxi Medical University; MDT Center for Cognitive Impairment and Sleep Disorders, the First Hospital, Shanxi Medical University
| | - W Gao
- Department of Otolaryngology Head and Neck Surgery, the First Hospital, Shanxi Medical University; Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer
| | - W T Hao
- Department of Otolaryngology Head and Neck Surgery, Shanxi Tumor Hospital
| | - J C Yao
- Department of Otolaryngology Head and Neck Surgery, Shanxi Tumor Hospital)
| | - L Wang
- Shanxi Medical University, Taiyuan, 030001, China
| | - H Jiang
- Department of Otolaryngology Head and Neck Surgery, the First Hospital, Shanxi Medical University; Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer
| | - Z H Gao
- Department of Otolaryngology Head and Neck Surgery, the First Hospital, Shanxi Medical University; Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer
| | - X R Wang
- Department of Otolaryngology Head and Neck Surgery, the First Hospital, Shanxi Medical University; Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer
| | - B Q Wang
- Department of Otolaryngology Head and Neck Surgery, the First Hospital, Shanxi Medical University; Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer
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Jiang H, Wang BQ, Gao ZH, Song KY. [Research progress on the changes of emotional and cognitive functions in patients with laryngeal cancer]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:880-882. [PMID: 29921065 DOI: 10.13201/j.issn.1001-1781.2018.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Indexed: 11/12/2022]
Abstract
At present, laryngeal cancer is more common in otolaryngology and head and neck surgery malignancies. Patients such as hoarseness, difficulty swallowing, ear pain, cough or cough, phlegm, dyspnea and other symptoms. which brings severe physical and psychological trauma to the patients and brings a heavy burden to the families and families of patients.Laryngeal cancer patients often take surgery, radiotherapy and other treatment methods, but these methods often cause patients with speech and speech disorders,patients with adverse psychological effects.With the continuous improvement of clinical diagnosis and treatment, patient survival gradually extended, the quality of their lives are increasingly valued.This basic indicator is the normal function of the throat recovery,preoperative and postoperative mood and cognitive status are also important aspects of quality of life (QOL).This article reviews the progress of preoperative and postoperative mood and cognitive changes in patients with laryngeal cancer..
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Pan HF, Sheng Y, Gao ZH, Chen HL, Qi YJ, Yi XK, Qin GH, Zhang JY. Transcriptome analysis of peach (Prunus persica L. Batsch) during the late stage of fruit ripening. Genet Mol Res 2016; 15:gmr-15-04-gmr.15049335. [PMID: 28081283 DOI: 10.4238/gmr15049335] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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
Fruit ripening is a complex developmental process, the details of which remain largely unknown in fleshy fruits. In this paper, the fruit flesh of two peach varieties, "Zhongyou9" (a nectarine; Prunus persica L. Batsch) and its mutant "Hongyu", was analyzed by RNA-seq technology during two stages of ripening at 20-day intervals. One hundred and eighty significant upregulated and two hundred and thirty-five downregulated genes were identified in the experiment. Many of these genes were related to plant hormones, chlorophyll breakdown, accumulation of aroma and flavor volatiles, and stress. To the best of our knowledge, this is the first transcriptome analysis of peach ripening, and our data will be useful for further studies of the molecular basis of fruit ripening.
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Affiliation(s)
- H F Pan
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
| | - Y Sheng
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
| | - Z H Gao
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
| | - H L Chen
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
| | - Y J Qi
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
| | - X K Yi
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
| | - G H Qin
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
| | - J Y Zhang
- Horticulture Research Institute, Anhui Academy of Agricultural Science, Hefei, Anhui, China
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Liu GY, Gao ZH, Li L, Song TT, Sheng XG. [Expression of Jagged1 mRNA in human epithelial ovarian carcinoma tissues and effect of RNA interference of Jagged1 on growth of xenograft in nude mice]. Zhonghua Fu Chan Ke Za Zhi 2016; 51:448-53. [PMID: 27356481 DOI: 10.3760/cma.j.issn.0529-567x.2016.06.009] [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: 11/05/2022]
Abstract
OBJECTIVE To investigate the expression of Jagged1 in human epithelial ovarian carcinoma tissues and the effect of Jagged1 on growth of xenograft in nude mice. METHODS (1) Forty-eight cases of ovarian cancer and 30 cases of patients with benign epithelial ovarian tumor in the Henan Province Xinxiang Central Hospital during Feb. 2011 to Mar. 2014 were enrolled in this study. The mRNA expression of Jagged1, Notch1 and the downstream target genes Hes1, Hey1 were analyzed by using realtime PCR method. (2) The ovarian cancer xenograft models in nude mice were constructed by injecting SKOV3 cells in axillary subcutaneouswere. The nude mice were randomly divided into Jagged1 interference group, blank plasmid group and control group. Each group had 10 mice. They were transfected with pcDNA3.1(+)-siRNA-Jagged1, blank plasmid pDC3.1 and phosphate buffer, respectively. The tumor volumes and tumor masses were measured 14 days after transfection and the inhibition rate was calculated. The relative mRNA expression of Jagged1, Notch1, Hes1 and Hey1 in xenograft tissues after transfection in each group was detected by using realtime PCR technique and the relative protein expression of Jagged1, Notch1, Hes1 and Hey1 in xenograft tissues was detected by utilizing western blot method. RESULTS (1) The relative mRNA expression of Jagged1, Notch1, Hes1 and Hey1 in ovarian cancer tissues were higher than benign ovarian tumor tissues, the differences were statistically significant (P<0.01). (2) The tumor volume was (491± 68) mm(3) and tumor mass was (2.6±0.4) g in Jagged1 interference group, which were significantly lower than that in the blank plasmid group [(842±88) mm(3) and (4.4±0.8) g, respectively] and that in the control group [(851±90) mm(3) and (4.5±0.9) g, respectively; P<0.05], the tumor inhibition rate was 42.2% in Jagged1 interference group, which was significantly higher than that in the blank plasmid group and that in the control group (2.2% and 0, respectively), the differences were statistically significant (P<0.05). The relative mRNA and protein expression of Jagged1, Hes1 and Hey1 in xenograft tissues of nude micein Jagged1 interference group were lower than that in the other two groups, the differences were statistically significant (P<0.05). There were no differences of relative mRNA and protein expression of Notch1 in xenograft tissues of nude mice among the three groups (P>0.05). CONCLUSIONS Jagged1 is highly expressed in epithelial ovarian carcinoma. Jagged1 gene interference in xenograft tumor can inhibit ovarian cancer cell growth and improve tumor suppressor rate, which probably play roles by inhibiting Notch1 signaling pathway.
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Affiliation(s)
- G Y Liu
- Department of Gynecologic Oncology, Henan Province Xinxiang Central Hospital, Xinxiang 453000, China
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Zhou H, Cai BH, Lü ZQ, Gao ZH, Qiao YS. Development, characterization, and annotation of potential simple sequence repeats by transcriptome sequencing in pears (Pyrus pyrifolia Nakai). Genet Mol Res 2016; 15:gmr8683. [PMID: 27706776 DOI: 10.4238/gmr.15038683] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Simple sequence repeats (SSRs), one of the most powerful molecular markers, can be used for DNA fingerprinting, variety identification, genetic mapping, and marker-assisted selection. Using the pear's (Pyrus pyrifolia Nakai) 75,764 unigenes (55,676,271 bp) obtained by deep transcriptome sequencing, a total of 10,622 novel SSRs were identified in 9154 unigenes, accounting for 14.02% of all unigenes. The average length and distribution of these SSRs was about 16 bp and 5.24 kb, respectively. Dinucleotide repeat motifs were the main type, with a frequency of 55.87%, followed by trinucleotides (24.45%). There were 159 kinds of repeat motifs existing in the pear transcriptome. AG/CT was the most frequent motif, accounting for 49.64%. All 9154 SSR-containing unigenes were functionally annotated using Nr (NCBI non-redundant protein database), Nt (NCBI non-redundant nucleotide database), and the Swiss-Prot database, and were classified further by Gene Ontology and Clusters of Orthologous Groups. In addition, a total of 4300 primer pairs were designed from all SSR loci obtained. Of these, 40 primers were randomly selected for PCR amplification and polyacrylamide gel (PAGE) analysis. Among the 40 primer pairs, 31 were successfully separated via PAGE. These findings also confirm that mining SSRs using next-generating sequencing technologies is a fast, effective, and reliable approach.
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Affiliation(s)
- H Zhou
- Laboratory of Fruit Tree Biotechnology, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - B H Cai
- Laboratory of Fruit Tree Biotechnology, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Z Q Lü
- Laboratory of Fruit Tree Biotechnology, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Z H Gao
- Laboratory of Fruit Tree Biotechnology, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Y S Qiao
- Laboratory of Fruit Tree Biotechnology, College of Horticulture, Nanjing Agricultural University, Nanjing, China
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Wu JW, Shen HL, Liu LM, Gao ZH. [Analysis of early failure of the PHILOS in proximal humerus fractures]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:683-685. [PMID: 29263513] [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: 06/07/2023]
Abstract
OBJECTIVE To analyze the reasons of early failure of the PHILOS in proximal humerus fractures. METHODS From Nov. 2010 to Nov. 2014, there were 117 patients with humerus fractures treated with PHILOS locking plate in Department of Orthopaedics, Xuanwu Hospital. All of the patients were treated with the plate by open reduction internal fixation, and we analyzed these cases retrospectively. After the operation, we removed the drainage tube within 48 h, and the patients were allowed to do the passive motion 3 days after the surgery if the X-Ray showed the plate and screws were reliable. Eight cases failed within 4 weeks after the operation. We analyzed the reasons of the failure. RESULTS The rate of the failed cases was 6.83%(8/117). The average age was 72.4(66-82) years. In the 8 failed cases, 3 were on the right side, and the other 5 on the left side. As for the reason of the fractures, 2 cases were because of car accidents, and the other 6 because of daily life injury. According to the Neer classification, 3 cases were 2-part fractures, and the other 5 3-part fractures. Three cases were total failure, and the other 5 partial failure. All the 8 failed cases failed within 4 weeks after the operation, of which 1 was on the sixth day after surgery, the other 7 2 to 4 weeks after the surgery.The 3 totally failed cases were treated by removing the screws and plates, the other 5 by conservative methods. All of the cases were malunion at the end. CONCLUSION The early failure of the PHILOS locking plate in proximal humerus fractures is related to the bad reduction during the operation, the loss of medial cortex support, the limitation of screw length, the osteoporosis and the improper rehabilitation after operation.It is very important to do good preoperative plan for a surgeon. During the operation, we should try our best in the fracture reduction, use the appropriate plate and screws, and then pay attention to the rehabilitation after the operation. After all of this, the rate of failure may be decreased.
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Affiliation(s)
- J W Wu
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - H L Shen
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - L M Liu
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Z H Gao
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
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Gao ZH, Hu L, Liu GL, Wei FL, Liu Y, Liu ZH, Fan ZP, Zhang CM, Wang JS, Wang SL. Bio-Root and Implant-Based Restoration as a Tooth Replacement Alternative. J Dent Res 2016; 95:642-9. [PMID: 26976131 DOI: 10.1177/0022034516639260] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
We previously reported that dental stem cell-mediated bioengineered tooth root (bio-root) regeneration could restore tooth loss in a miniature pig model. As a potential new method for tooth restoration, it is essential to compare this method with the widely used commercial dental implant-based method of tooth restoration. Tooth loss models were created by extracting mandibular incisors from miniature pigs. Allogeneic periodontal ligament stem cells (PDLSCs) and dental pulp stem cells (DPSCs) were isolated and cultured. A PDLSC sheet was prepared by adding 20.0 µg/mL vitamin C to the culture medium; in addition, a hydroxyapatite tricalcium phosphate (HA/TCP)/DPSC graft was fabricated and cultured in a 3-dimensional culture system. A total of 46 bio-root implantations and 9 dental implants were inserted, and crown restorations were performed 6 mo after implantation. Histological, radiological, biomechanical, and elemental analyses were used to evaluate and compare tissue-engineered bio-roots and dental implants to the natural tooth roots. After 6 mo, both computed tomography scans and histological examinations showed that root-like structures and dentin-like tissues had formed. Three months after crown restoration, clinical assessments revealed that tooth function was equivalent in the regenerated bio-root and the dental implant. Biomechanical testing showed that the bio-roots were similar to natural tooth roots in compressive strength, modulus of elasticity, and torsional force; however, these properties were significantly higher in the dental implants. Elemental analysis revealed a higher similarity in elemental composition between bio-roots and natural tooth roots than between bio-roots and dental implants. However, the dental implant success rate was 100% (9 of 9) and the bio-root success rate was only 22% (10 of 46). Taken together, we showed that an allogeneic HA/TCP/DPSC/PDLSC sheet could successfully build a bio-root with structure and function similar to the natural tooth root; however, tissue engineering procedures must be optimized further to improve the success rate.
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Affiliation(s)
- Z H Gao
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - L Hu
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - G L Liu
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - F L Wei
- Department of Orthodontics, Shandong Provincial Key Laboratory of Oral Biomedicine, School of Stomatology, Shandong University, Jinan, China
| | - Y Liu
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - Z H Liu
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - Z P Fan
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - C M Zhang
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - J S Wang
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - S L Wang
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China Department of Biochemistry and Molecular Biology, Capital Medical University School of Basic Medical Sciences, Beijing, China
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Wu JW, Shen HL, Liu LM, Gao ZH. [Analysis of early failure of the PHILOS in proximal humerus fractures]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:683-685. [PMID: 27538152] [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: 06/06/2023]
Abstract
OBJECTIVE To analyze the reasons of early failure of the PHILOS in proximal humerus fractures. METHODS From Nov. 2010 to Nov. 2014, there were 117 patients with humerus fractures treated with PHILOS locking plate in Department of Orthopaedics, Xuanwu Hospital. All of the patients were treated with the plate by open reduction internal fixation, and we analyzed these cases retrospectively. After the operation, we removed the drainage tube within 48 h, and the patients were allowed to do the passive motion 3 days after the surgery if the X-Ray showed the plate and screws were reliable. Eight cases failed within 4 weeks after the operation. We analyzed the reasons of the failure. RESULTS The rate of the failed cases was 6.83%(8/117). The average age was 72.4(66-82) years. In the 8 failed cases, 3 were on the right side, and the other 5 on the left side. As for the reason of the fractures, 2 cases were because of car accidents, and the other 6 because of daily life injury. According to the Neer classification, 3 cases were 2-part fractures, and the other 5 3-part fractures. Three cases were total failure, and the other 5 partial failure. All the 8 failed cases failed within 4 weeks after the operation, of which 1 was on the sixth day after surgery, the other 7 2 to 4 weeks after the surgery.The 3 totally failed cases were treated by removing the screws and plates, the other 5 by conservative methods. All of the cases were malunion at the end. CONCLUSION The early failure of the PHILOS locking plate in proximal humerus fractures is related to the bad reduction during the operation, the loss of medial cortex support, the limitation of screw length, the osteoporosis and the improper rehabilitation after operation.It is very important to do good preoperative plan for a surgeon. During the operation, we should try our best in the fracture reduction, use the appropriate plate and screws, and then pay attention to the rehabilitation after the operation. After all of this, the rate of failure may be decreased.
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Affiliation(s)
- J W Wu
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - H L Shen
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - L M Liu
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Z H Gao
- Department of Orthopaedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
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Yang X, Yi XK, Chen Y, Zhang AF, Zhang JY, Gao ZH, Qi YJ, Xu YL. Identification of Pseudomonas syringae pv. actinidiae strains causing bacterial canker of kiwifruit in the Anhui Province of China, and determination of their streptomycin sensitivities. Genet Mol Res 2015; 14:8201-10. [PMID: 26345745 DOI: 10.4238/2015.july.27.7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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
Bacterial canker, caused by Pseudomonas syringae pv. actinidiae, is one of the most severe diseases of kiwifruit. It has become an international pandemic and threatens the sustainable development of kiwifruit production in all main kiwi-growing regions worldwide. Streptomycin has been the major bactericide for the control of kiwifruit canker, especially in Anhui Province, one of the main kiwifruit production regions in China. However, until now, no studies on the baseline sensitivity to streptomycin of field isolates of P. syringae pv. actinidiae from China have been available. During 2012-2013, a total of 102 single-colony P. syringae pv. actinidiae strains were isolated: 36, 12, 13, 26, and 15 strains from Yuexi, Jinzhai, Huoshan, Qianshan, and Taihu counties, respectively. All strains were confirmed by production of a 280-bp fragment using the specific primers PsaF1/R2 upon polymerase chain reaction amplification, followed by an assay for confirmation of pathogenicity to fulfill Koch's postulates. In this study, the streptomycin sensitivity of the 102 isolated strains was determined. The half-maximal effective concentration values for inhibition of growth by streptomycin were 0.03-0.42 μg/mL (average 0.12 ± 0.06 μg/mL). The baseline sensitivity curve was unimodal, representing range-of-variation factors of 14.0. No resistant subpopulation was identified among the strains used in the study. Thus, these sensitivity data could be used as a baseline for monitoring the shift in sensitivity of P. syringae pv. actinidiae populations to streptomycin in Anhui Province. Continuous resistance monitoring should be carried out, as streptomycin is an at-risk bactericide agent.
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Affiliation(s)
- X Yang
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - X-K Yi
- Insitute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Y Chen
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - A-F Zhang
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - J-Y Zhang
- Insitute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Z-H Gao
- Insitute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Y-J Qi
- Insitute of Horticulture, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Y-L Xu
- Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crops, Anhui Province, Hefei, China
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Liang YQ, Gao ZH, Cui ZD, Zhu SL, Li ZY, Yang XJ. Enhanced Capacitance of TiO2 Single Crystals Through Chemically Deposited Graphene Films. J Nanosci Nanotechnol 2015; 15:4567-4573. [PMID: 26369081 DOI: 10.1166/jnn.2015.9696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Single-crystals of titanium oxide (TiO2) were wrapped in a graphene (G) film by chemical deposition. The morphology, composition and structure of the resulting composite were subsequently characterized by SEM, TEM, XRD and FT-IR analysis. The electrochemical properties of the composites were studied by cyclic voltammetry, which showed that the introduction of graphene enhances the electrode conductivity, thereby improving the supercapacitive behavior of TiO2. Galvanostatic charge-discharge tests demonstrated that a supercapacitor device fabricated from TiO2 crystals wrapped in graphene (G-TiO2) exhibits a good cycle life, with 94% stability even after 1000 cycles.
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20
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Zhou Y, Wu XX, Zhang Z, Gao ZH. Identification of differentially expressed genes associated with flower color in peach using genome-wide transcriptional analysis. Genet Mol Res 2015; 14:4724-39. [PMID: 25966247 DOI: 10.4238/2015.may.11.5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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
Flower color is an important trait of the ornamental peach (Prunus persica L.). However, the mechanism responsible for the different colors that appear in the same genotype remains unclear. In this study, red samples showed higher anthocyanins content (0.122 ± 0.009 mg/g), which was significantly different from that in white samples (0.066 ± 0.010 mg/g). Similarly to carotenoids content, red extract (0.058 ± 0.004 mg/L) was significantly higher in white extract (0.015 ± 0.004 mg/L). We estimated gene expression using Illumina sequencing technology in libraries from white and red flower buds. A total of 3,599,960 and 3,464,141 tags were sequenced from the 2 libraries, respectively. Moreover, we identified 106 significantly differentially expressed genes between the 2 libraries. Among these, 78 and 28 represented transcripts with a higher or lower abundance of more than 2-fold than in the white flower library, respectively. GO annotation indicated that highly ranked genes were involved in the pigment biosynthetic process. Expression patterns of 11 genes were verified using quantitative reverse transcription-polymerase chain reaction assays. The results suggest that hydroxycinnamoyl-coenzyme A shikimate/quinate hydroxycinnamoyltransferase, 2-oxoglutarate-dependent dioxygenase, isoflavone reductase, riboflavin kinase, zeta-carotene desaturase, and ATP binding cassette transporter may be associated with the flower color formation. Our results may be useful for scientists focusing on Prunus persica floral development and biotechnology.
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Affiliation(s)
- Y Zhou
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - X X Wu
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Z Zhang
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Z H Gao
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
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21
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Smith AL, Bascuñana C, Hall A, Salman A, Andrei AZ, Volenik A, Rothenmund H, Ferland D, Lamoussenery D, Kamath AS, Amre R, Caglar D, Gao ZH, Haegert DG, Kanber Y, Michel RP, Omeroglu-Altinel G, Asselah J, Bouganim N, Kavan P, Arena G, Barkun J, Chaudhury P, Gallinger S, Foulkes WD, Omeroglu A, Metrakos P, Zogopoulos G. Establishing a clinic-based pancreatic cancer and periampullary tumour research registry in Quebec. ACTA ACUST UNITED AC 2015; 22:113-21. [PMID: 25908910 DOI: 10.3747/co.22.2300] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Enrolling patients in studies of pancreatic ductal adenocarcinoma (pdac) is challenging because of the high fatality of the disease. We hypothesized that a prospective clinic-based study with rapid ascertainment would result in high participation rates. Using that strategy, we established the Quebec Pancreas Cancer Study (qpcs) to investigate the genetics and causes of pdac and other periampullary tumours (pats) that are also rare and underrepresented in research studies. METHODS Patients diagnosed with pdac or pat were introduced to the study at their initial clinical encounter, with a strategy to enrol participants within 2 weeks of diagnosis. Patient self-referrals and referrals of unaffected individuals with an increased risk of pdac were also accepted. Family histories, epidemiologic and clinical data, and biospecimens were collected. Additional relatives were enrolled in families at increased genetic risk. RESULTS The first 346 completed referrals led to 306 probands being enrolled, including 190 probands affected with pdac, who represent the population focus of the qpcs. Participation rates were 88.4% for all referrals and 89.2% for pdac referrals. Family history, epidemiologic and clinical data, and biospecimens were ascertained from 91.9%, 54.6%, and 97.5% respectively of patients with pdac. Although demographics and trends in risk factors in our patients were consistent with published statistics for patients with pdac, the qpcs is enriched for families with French-Canadian ancestry (37.4%), a population with recurrent germ-line mutations in hereditary diseases. CONCLUSIONS Using rapid ascertainment, a pdac and pat research registry with high participation rates can be established. The qpcs is a valuable research resource and its enrichment with patients of French-Canadian ancestry provides a unique opportunity for studies of heredity in these diseases.
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Affiliation(s)
- A L Smith
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; The Goodman Cancer Research Centre, McGill University, Montreal, QC
| | - C Bascuñana
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; The Goodman Cancer Research Centre, McGill University, Montreal, QC
| | - A Hall
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; The Goodman Cancer Research Centre, McGill University, Montreal, QC
| | - A Salman
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC
| | - A Z Andrei
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; The Goodman Cancer Research Centre, McGill University, Montreal, QC
| | - A Volenik
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; The Goodman Cancer Research Centre, McGill University, Montreal, QC. ; Program in Cancer Genetics, Department of Oncology and Human Genetics, McGill University, Montreal, QC
| | - H Rothenmund
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; The Goodman Cancer Research Centre, McGill University, Montreal, QC. ; Program in Cancer Genetics, Department of Oncology and Human Genetics, McGill University, Montreal, QC
| | - D Ferland
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC
| | - D Lamoussenery
- Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC. ; Hepato-Pancreato-Biliary Oncology, McGill University Health Centre, Montreal, QC
| | - A S Kamath
- Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC
| | - R Amre
- Department of Pathology, McGill University Health Centre, Montreal, QC
| | - D Caglar
- Department of Pathology, McGill University Health Centre, Montreal, QC
| | - Z H Gao
- Department of Pathology, McGill University Health Centre, Montreal, QC
| | - D G Haegert
- Department of Pathology, McGill University Health Centre, Montreal, QC
| | - Y Kanber
- Department of Pathology, McGill University Health Centre, Montreal, QC
| | - R P Michel
- Department of Pathology, McGill University Health Centre, Montreal, QC
| | | | - J Asselah
- Hepato-Pancreato-Biliary Oncology, McGill University Health Centre, Montreal, QC
| | - N Bouganim
- Hepato-Pancreato-Biliary Oncology, McGill University Health Centre, Montreal, QC
| | - P Kavan
- Hepato-Pancreato-Biliary Oncology, McGill University Health Centre, Montreal, QC
| | - G Arena
- Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC
| | - J Barkun
- Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC
| | - P Chaudhury
- Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC
| | - S Gallinger
- The Research Institute of the McGill University Health Centre, Montreal, QC
| | - W D Foulkes
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; Program in Cancer Genetics, Department of Oncology and Human Genetics, McGill University, Montreal, QC
| | - A Omeroglu
- Department of Pathology, McGill University Health Centre, Montreal, QC
| | - P Metrakos
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC
| | - G Zogopoulos
- The Research Institute of the McGill University Health Centre, Montreal, QC. ; The Goodman Cancer Research Centre, McGill University, Montreal, QC. ; Hepato-Pancreato-Biliary and Transplant Surgery, McGill University Health Centre, Montreal, QC. ; Program in Cancer Genetics, Department of Oncology and Human Genetics, McGill University, Montreal, QC
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Yang XL, Yu ZJ, Gao ZH, Yang XH, Liu JZ. Morphological characteristics and developmental changes of the ovary in the tick Haemaphysalis longicornis Neumann. Med Vet Entomol 2014; 28:217-221. [PMID: 24138414 DOI: 10.1111/mve.12035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 01/26/2013] [Revised: 06/24/2013] [Accepted: 07/12/2013] [Indexed: 06/02/2023]
Abstract
Haemaphysalis longicornis (Ixodida: Ixodidae) is an important vector of transovarially transmitted parasites of the genus Babesia (Piroplasmida: Babesiidae). In the present study, we investigated the morphological characteristics and developmental changes of the ovary of H. longicornis. We show that the ovary of H. longicornis has a single tubular structure and is surrounded by a tunica propria. There is a longitudinal groove along one side of the ovary. During feeding and after engorgement, great changes can be observed in the ovary of H. longicornis and two rapid growth phases can be detected. The number of major protein bands of the ovary is significantly increased from day 3 of feeding and reaches a maximum on the day of engorgement. Therefore, the great diversity of proteins in the ovaries of H. longicornis can facilitate the identification of new targets for vaccine development.
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Affiliation(s)
- X L Yang
- Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Sciences, Hebei Normal University, Shijiazhuang, China; Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, Xinjiang University, Urumqi, China
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23
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Wang PP, Gao ZH, Ni ZJ, Zhuang WB, Zhang Z. Isolation and identification of new pollen-specific SFB genes in Japanese apricot (Prunus mume). Genet Mol Res 2013; 12:3286-95. [PMID: 24065670 DOI: 10.4238/2013.september.3.5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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
SFB, a candidate gene for the pollen S gene, has been identified in several species of Prunus (Rosaceae). We isolated 5 new SFB alleles from 6 Japanese apricot (Prunus mume) lines using a specific Prunus SFB primer pair (SFB-C1F and Pm-Vb), which was designed from conserved regions of Prunus SFB. The nucleotide sequences of these SFB genes were submitted to the GenBank database. The 5 new SFB alleles share typical structural features with SFB alleles from other Prunus species and were found to be polymorphic, with 67.08 to 96.91% amino acid identity. These new SFB alleles were specifically expressed in the pollen. We conclude that the PmSFB alleles that we identified are the pollen S determinants of Japanese apricot; they have potential as a tool for studies of the mechanisms of pollen self-incompatibility.
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Affiliation(s)
- P P Wang
- College of Horticulture, Nanjing Agricultural University, Weigang, Nanjing City, Jiangsu Province, China
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24
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Zhuang WB, Shi T, Gao ZH, Zhang Z, Zhang JY. Differential expression of proteins associated with seasonal bud dormancy at four critical stages in Japanese apricot. Plant Biol (Stuttg) 2013; 15:233-42. [PMID: 22672637 DOI: 10.1111/j.1438-8677.2012.00589.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Dormancy is of great significance in the growth and development of deciduous fruit trees. We used a combination of two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser desorption/ionisation time of flight/time of flight mass spectrometry (MALDI-TOF/TOF MS) to identify the differentially expressed proteome of Japanese apricot flower buds at four critical stages, from paradormancy before leaf fall to dormancy release. More than 400 highly reproducible protein spots (P < 0.05) were detected: 34 protein spots showed a greater than twofold difference in expression values, of which 32 protein spots were confidently identified from databases. Identified proteins were classified into six functional categories: stress response and defence (11), energy metabolism (ten), protein metabolism (five), cell structure (three), transcription (one) and unclassified (two). The glyoxalase I homologue could help Japanese apricot survival under various abiotic and biotic stresses, greatly contributing to its dormancy. Enolase, thioredoxin family proteins and triose phosphate isomerase provide adequate energy to complete consecutive dormancy release and bud break in Japanese apricot. Cinnamyl alcohol dehydrogenase 9 and arginase enhance the resilience of plants, enabling them to complete dormancy safely. Analysis of functions of identified proteins and related metabolic pathways will increase our knowledge of dormancy in woody plants.
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Affiliation(s)
- W-B Zhuang
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
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Gao ZH, Yuan RY, Chen KY, Li GP. The complicated relationship between obstructive sleep apnea and inflammation biomarkers. Acta Neurol Scand 2012; 125:e32-3; author reply e34-5. [PMID: 22515302 DOI: 10.1111/j.1600-0404.2011.01632.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Zhang JY, Qiao YS, Lv D, Gao ZH, Qu SC, Zhang Z. Malus hupehensis NPR1 induces pathogenesis-related protein gene expression in transgenic tobacco. Plant Biol (Stuttg) 2012; 14 Suppl 1:46-56. [PMID: 21973266 DOI: 10.1111/j.1438-8677.2011.00483.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Most commercially grown apple cultivars are susceptible to fungal diseases. Malus hupehensis has high resistance to many diseases affecting apple cultivars. Understanding innate defence mechanisms would help to develop disease-resistant apple crops. Non-expressor of pathogenesis-related genes 1 (NPR1) plays a key role in regulating salicylic acid (SA)-mediated systemic acquired resistance (SAR). MhNPR1 cDNA, corresponding to genomic DNA and its 5' flanking sequences, was isolated from M. hupehensis. Sequence analysis showed that the regulatory mechanism for oligomer-monomer transition of the MhNPR1 protein in apple might be similar to that of GmNPR1 in soybean, but different from that of AtNPR1 in Arabidopsis. No significant differences in MhNPR1 expression were found in M. hupehensis after infection with Botryosphaeria berengeriana, showing that MhNPR1 might be regulated by pathogens at the protein level, as described for Arabidopsis and grapevine. SA treatment significantly induced MhNPR1 expression in leaves, stems and roots, while methyl jasmonate (MeJA) treatment induced MhNPR1 expression in roots, but not in leaves or stems. The expression of MhNPR1 was highly increased in roots, moderately in leaves, and did not change in stems after treatment with 1-aminocyclopropane-1-carboxylic acid (ACC). SAR marker genes (MhPR1 and MhPR5) were induced by SA, MeJA and ACC in leaves, stems and roots. Overexpression of MhNPR1 significantly induced the expression of pathogenesis-related genes (NtPR1, NtPR3 and NtPR5) in transgenic tobacco plants and resistance to the fungus Botrytis cinerea, suggesting that MhNPR1 orthologues are a component of the SA defence signalling pathway and SAR is induced in M. hupehensis.
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Affiliation(s)
- J-Y Zhang
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
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Affiliation(s)
- S E Congly
- Department of Medicine, Division of Gastroenterology, University of Calgary, Calgary, Alberta, Canada
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Zhang Z, Wei JH, Yang CM, Chen HQ, Sui C, Gao ZH. First Report of Alternaria Leaf Blight on Bupleurum chinense Caused by Alternaria alternata in China. Plant Dis 2010; 94:918. [PMID: 30743562 DOI: 10.1094/pdis-94-7-0918a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bupleurum chinense DC. (family Umbelliferae) is an important medicinal herb in traditional Chinese medicine and is cultivated as an economically important plant in China (2). From 2006 to 2009, severe foliar disease was observed on B. chinense in Haidian, Changping, and Shunyi districts, Beijing, China. Approximately 75 to 85% of fields were affected with disease incidence ranging from 65 to 90%. Distribution of the disease in affected B. chinense fields was generally associated with high soil moisture, often corresponding to poor drainage. Initial symptoms first appeared on older leaves as irregularly shaped, minute, dark brown-to-black spots, with yellow borders on the edge of the affected leaflet blade. As the disease progressed, the lesions expanded, causing the leaflets to turn brown, shrivel, and die. Isolations performed on potato dextrose agar (PDA) initially resulted in white colonies. After 7 days of incubation at 25°C, the colonies turned gray or brown. Conidia varied in size from 10 × 6 to 40 × 12 μm, appeared brown to dark brown or olive-brown, were short beaked and borne in long chains, oval and bean-shaped with one to six transverse septa and zero to three longitudinal septa. Sequences of the rDNA from the internal transcribed spacer regions 1 and 2 and the 5.8S gene were amplified using primers ITS1 and ITS4, were obtained from three isolates, and comparisons with GenBank showed 100% similarity with A. alternata (Genbank Accession No. AB470912.1). For pathogenicity tests, three isolates were grown on PDA for 14 days. Inoculations were performed on detached, surface-sterilized, and healthy B. chinense leaflets following the method of Belisario (1). A 5-μl drop of conidial suspension containing 1 × 105 CFU/ml was placed on each leaflet and 12 leaves per isolate were used. Leaves were incubated in a growth chamber (80 to 90% relative humidity; 50 to 60 klx/m2 light intensity with a 12-h photoperiod). After 5 days, leaf spots similar to the original symptoms developed on all inoculated leaves and A. alternata was consistently reisolated from symptomatic leaf tissues on PDA. Control leaflets inoculated with sterile water remained asymptomatic. The experiment was performed three times. To our knowledge, this is the first report of A. alternata on B. chinense from China. References: (1) A. Belisario et al. Plant Dis. 83:696, 1999. (2) C. Sui et al. Plant Dis. 93:844, 2009.
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Affiliation(s)
- Z Zhang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - J H Wei
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - C M Yang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - H Q Chen
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - C Sui
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Z H Gao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
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Cui J, Lin AL, Liu Q, Sun Q, Gao ZH. Dendritic cells transfected with lentiviral vector-encoding human granulocyte-macrophage colony-stimulating factor augment anti-tumour T-cell response in vitro. Int J Immunogenet 2010; 37:329-36. [PMID: 20518832 DOI: 10.1111/j.1744-313x.2010.00927.x] [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: 11/26/2022]
Abstract
Dendritic cells (DC) are professional antigen-presenting cells that can actively taken up and present tumour-derived proteins to induce a tumour-specific immune response. Granulocyte-macrophage colony-stimulating factor (GM-CSF) plays a pivotal role in the generation, sensitization, maturation and survival of DC. We charged the peripheral blood monocyte cell-derived DC with tumour lysate, and then transfected the DC with lentiviral vector-encoding human GM-CSF (hGM-CSF). The antigen-presenting capacity of the hGM-CSF-transfected DC was tested by means of the mixed lymphocyte reaction and cytotoxic T-lymphocyte assay using wild-type DC as the control. The Lenti-hGM-CSF-transfected DC was able to stimulate the proliferation of naive allogeneic T lymphocytes and to generate tumour-specific cytotoxic T lymphocytes more efficiently than the wild-type DC. This data indicates that Lenti-hGM-CSF-transfected DC could potentially be used as an effective clinical approach for cancer immunotherapy.
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Affiliation(s)
- J Cui
- Department of Pathology, Qian-Fo-Shan Hospital of Shandong Province, Medical College of Shandong University, Shandong Province, Jinan, China
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Abstract
We have used site-directed mutagenesis, flow dialysis, and Fourier transform infrared (FTIR) spectroscopy to study Ca(2+)-binding to the regulatory component of calcineurin. Single Glu-Gln(E --> Q) mutations were used to inactivate each of the four Ca(2+)-binding sites of CnB in turn, generating mutants Q1, Q2, Q3, and Q4, with the number indicating which Ca(2+) site is inactivated. The binding data derived from flow dialysis reveal two pairs of sites in the wild-type protein, one pair with very high affinity and the other with lower affinity Ca(2+)-binding sites. Also, only three sites are titratable in the wild-type protein because one site cannot be decalcified. Mutation of site 2 leaves the protein with only two titratable sites, while mutation of sites 1, 3, or 4 leave three titratable sites that are mostly filled with 3 Ca(2+) equiv added. The binding data further show that each of the single-site mutations Q2, Q3, and Q4 affects the affinities of at least one of the remaining sites. Mutation in either of sites 3 or 4 results in a protein with no high-affinity sites, indicating communication between the two high-affinity sites, most likely sites 3 and 4. Mutation in site 2 decreases the affinity of all three remaining sites, though still leaving two relatively high-affinity sites. The FTIR data support the conclusions from the binding data with respect to the number of titratable sites as well as the impact of each mutation on the affinities of the remaining sites. We conclude therefore that there is communication between all four Ca(2+)-binding sites. In addition, the Ca(2+) induced changes in the FTIR spectra for the wild-type and Q4 mutant are most similar, suggesting that the same three Ca(2+)-binding sites are being titrated, i.e., site 4 is the very high-affinity site under the conditions of the FTIR experiments.
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Affiliation(s)
- S C Gallagher
- Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Kellersmann R, Zhong R, Garcia B, Gao ZH, Kellersmann A, Kiyochi H, Grant DR. A short course of high-dose cyclophosphamide induces long-term survival of intestinal allografts in mice. Transpl Int 2001; 14:261-5. [PMID: 11512060 DOI: 10.1007/s001470100328] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Several transplant programs have recently added cyclophosphamide (CyP) to their immune suppression protocols in an attempt to reduce intestinal graft rejection rates. The present study was undertaken to confirm the benefits of this drug in a murine small bowel transplant model. A short course of monotherapy with CyP 20 mg/kg per dose resulted in a mean survival time (MST) of 17.5 +/- 3.6 days, compared with a MST of 7.5 +/- 0.7 days in the untreated controls (P < 0.01). Cyclosporin A (CsA) 30 mg/kg per day produced comparable survival rates when used as monotherapy (MST: 14.2 +/- 1.3 days) or in combination with CyP 20 mg/kg per dose (MST: 21.3 +/- 5.1 days). Treatment with high dose CyP (40 mg/kg per dose) completely prevented graft loss in 8 of 10 animals (MST: 72.5 +/- 5.3 days, P < 0.01). However, adding CsA abrogated the induction of long-term survival achieved by CyP alone (MST: 23 +/- 0.4 days). These data have important implications for the use of CyP in clinical transplantation.
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Affiliation(s)
- R Kellersmann
- J.P. Robarts Research Institute and the Department of Surgery, London Health Sciences Centre, 339 Windermere Rd., London, Ontario, Canada, N6A 5A5
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Wei GL, Shang ZH, Yu YN, Liu XL, Gao ZH, Pan MC. [Novel affinity membrane used for bilirubin removal]. Se Pu 2001; 19:74-7. [PMID: 12541852] [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: 02/28/2023] Open
Abstract
Bilirubin is a toxic substance. In order to effectively remove it from the hepatic patients' blood, two novel affinity membranes were prepared. These were prepared by chemically grafting on cellulose and immobilized with different ligands. One kind of ligand was poly-D-lysine, the other one was quaternary ammonium salt. Both affinity membranes were used for removal bilirubin from phosphate buffer and HSA solutions, and the effects of temperature, HSA concentration, adsorption time in static state experiment and flow rate in dynamic state experiment have been investigated. The results indicated that the membranes could remove over 70% bilirubin from phosphate buffer and at least 50% from low concentration HSA solutions. The results also indicated that the removal efficiency was better at higher temperature. In the static state experiment, four hours can be selected as adsorption time. In the dynamic state experiment, the flow rate can be properly increased.
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Affiliation(s)
- G L Wei
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116012, China
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Abstract
The molecular oscillator that keeps circadian time is generated by a negative feedback loop. Nuclear entry of circadian regulatory proteins that inhibit transcription from E-box-containing promoters appears to be a critical component of this loop in both Drosophila and mammals. The Drosophila double-time gene product, a casein kinase I epsilon (CKIepsilon) homolog, has been reported to interact with dPER and regulate circadian cycle length. We find that mammalian CKIepsilon binds to and phosphorylates the murine circadian regulator mPER1. Unlike both dPER and mPER2, mPER1 expressed alone in HEK 293 cells is predominantly a nuclear protein. Two distinct mechanisms appear to retard mPER1 nuclear entry. First, coexpression of mPER2 leads to mPER1-mPER2 heterodimer formation and cytoplasmic colocalization. Second, coexpression of CKIepsilon leads to masking of the mPER1 nuclear localization signal and phosphorylation-dependent cytoplasmic retention of both proteins. CKIepsilon may regulate mammalian circadian rhythm by controlling the rate at which mPER1 enters the nucleus.
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Affiliation(s)
- E Vielhaber
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City 84132, USA
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Gao ZH, Lazarovits AI, Wang J, Xing J, Garcia B, Kellersmann R, Kelvin D, Zhong R. Allograft tolerance induced by cyclophosphamide without prior inoculation of donor cells--immune suppression and redirection. Transpl Immunol 2000; 8:65-73. [PMID: 10834612 DOI: 10.1016/s0966-3274(00)00013-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/26/2022]
Abstract
OBJECTIVES To determine the possibility and cellular mechanism of inducing allograft tolerance by multiple injection of a lower dose of cyclophosphamide without prior infusion of donor cells. METHODS AND RESULTS Heterotopic heart grafts were performed in MHC mismatched strain combinations (C57/B6 vs. BALB/c). Cyclophosphamide (40 mg/kg) was given intravenously on days 0, 2, 4 and 7 without prior infusion of donor cells. Long-term (> 100 days) allograft survival with normal histology was achieved. The long-term survivors accepted the donor skin grafts, but rejected the third-party skin grafts. Cyclophosphamide treatment initially led to profound lymphocytopenia, inhibition of spontaneous blastogenesis and low levels of lymphocyte proliferation response to both donor and third-party antigens. Ultimately, donor-specific tolerance occurred demonstrated by normal levels of peripheral lymphocytes, spontaneous blastogenesis and lymphocyte proliferation response to third-party antigens, and low levels of lymphocyte proliferation response to donor antigen. A switch of cytokines from IFNgamma dominant to IL-4 dominant, a low level of IgM and a high level of IgG1 were found in tolerant mice. CONCLUSIONS Allograft tolerance can be induced by a short course of cyclophosphamide without prior donor cell inoculation. Tolerance induced is characterized initially by non-specific immunosuppression, which progresses to donor-specific hyporesponsiveness associated with the development of a Th2 dominant cytokine response.
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Affiliation(s)
- Z H Gao
- Department of Surgery, The University of Western Ontario, London, Canada
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Abstract
Casein kinase I (CKI) is a widely expressed protein kinase family implicated in diverse processes including membrane trafficking, DNA repair, and circadian rhythm. Despite the large number of CKI genes, few biologically relevant substrates have been identified. As an approach to better defining the spectrum of CKI substrates, we extended a recently described in vitro expression cloning (IVEC) strategy. Polypeptides pools were screened for kinase-dependent electrophoretic mobility shifts. Ten putative CKI substrates were isolated from an initial sample of 3000 random cDNA clones. Candidate substrates include proteins involved in RNA metabolism (a putative RNA helicase, the nucleolar protein hNOP56, and hnRNP A1, and ribosomal proteins L4, L8, and L13), as well as keratin 17, a necdin-related protein, and the calcium-binding proteins desmoglein 2 and annexin II. The same pools were also screened with active ERK2, and four substrates identified: aldolase, NSD-like protein, uracil-DNA glycosylase, and HHR23A. IVEC is an effective method to identify novel protein kinase substrates.
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Affiliation(s)
- Z H Gao
- Department of Oncological Sciences, University of Utah, Salt Lake City, Utah 84132, USA
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Abstract
Calcineurin B (CnB) and calmodulin (CaM) are two structurally similar but functionally distinct 'EF-hand' Ca2+-binding proteins. CnB is the regulatory subunit of the CaM-stimulated protein phosphatase, calcineurin. CaM is a unique multifunctional protein that interacts with and modulates the activity of many target proteins. CnB and CaM are both required for the full activation of the phosphatase activity of calcineurin and are not interchangeable. The two proteins recognize distinct binding sites on calcineurin A subunit (CnA) and perform different functions. Phage-displayed peptide libraries (pIII and pVIII libraries) were screened with CnB and CaM to isolate peptides that could then be compared to determine if there were binding preferences of the two proteins. The Ca2+-dependent binding of phage-displayed peptides to CnB and CaM is specifically blocked by synthetic peptides derived from the CnB-binding domain of CnA and the CaM-binding domain of myosin light chain kinase respectively. Both CnB- and CaM-binding peptides have a high content of tryptophan and leucine, but CnB-binding peptides are more hydrophobic than CaM-binding peptides. CnB-binding peptides are negatively charged with clusters of hydrophobic residues rich in phenylalanine, whereas the CaM-binding peptides are positively charged and often contain an Arg/Lys-Trp motif. The binding preferences identified with peptide libraries are consistent with the features of the CnB-binding domains of all CnA isoforms and the CaM-binding domains of CaM targets.
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Affiliation(s)
- Z H Gao
- Laboratory of Biochemistry, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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Kellersmann R, Zhong R, Gao ZH, Garcia B, Zhang Z, Kiyochi H, Xing JJ, Grant D. Beneficial effects of microsurgical lymphatic reconstruction after intestinal transplantation in rats. Transplant Proc 1998; 30:2642. [PMID: 9745527 DOI: 10.1016/s0041-1345(98)00764-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- R Kellersmann
- Department of Surgery, London Health Sciences Center, University of Western Ontario, Canada
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Abstract
The proliferative response of human lymphocytes to stimuli such as foreign histocompatibility antigens or mitogens is generally assessed by measuring the amount of tritiated thymidine which the cells incorporated in culture. In this paper, the possibility of assessing lymphocyte proliferation and viability by an empirical assay, using measurement of light absorbance on a ELISA reader in the yellow wave length (450 nm/air-550 nm/air), has been studied. The correlation of these measurements with a colormetric viability assay using MTS/PMS, with tritiated thymidine incorporation and with trypan blue exclusion viability counting, was determined. The results showed that the light absorbance assay correlated well with cell proliferation during 48-120 hours culture period and with cell viability after a 72 hour period. The MTS/PMS colormetric assay as well as trypan blue exclusion cell counting confirmed that the light absorbance assay was not merely caused by dead cells. This data confirm that the light absorbance assay is sufficiently sensitive to low levels of proliferation to allow detection of such responses at least as effectively as thymidine incorporation. The light absorbance assay procedure avoids the expense, time and hazards associated with scintillation counting, and is simple to perform without the necessity for reagents and preparative steps required by other assays.
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Affiliation(s)
- Z H Gao
- Johns Hopkins Hospital, Department of Surgery, Baltimore, Maryland 21205, USA
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Watanabe T, Gao ZH, Shinozuka N, Schulick RD, Kuo A, Burdick JF. Unexpectedly low immunocompetence in transplant patients on ketoconazole. Clin Transplant 1997; 11:599-603. [PMID: 9408692] [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: 02/05/2023]
Abstract
The P450 inhibitor ketoconazole may be used to decrease the dose, and therefore cost, of cyclosporine (CYA) by greatly decreasing the dose necessary to obtain therapeutic levels. However, the degree of immunosuppression produced using this drug regimen is not certain. We studied the immunocompetence of patients that had been started on ketoconazole to reduce the dose of CYA compared with patients treated conventionally. 95 assays were done in 64 patients including 6 assays in patients receiving low dose CYA plus ketoconazole. Immunocompetence was tested by measuring the mixed lymphocyte response using stimulators either non-depleted (ND) or depleted (D) of antigen presenting cells, based on the finding that CYA inhibits the response against D at a lower dose than against ND. Responses to ND/D ranged from +/+ through +/- to -/-. Normal individuals were always +/+. In conventionally treated patients with CYA the incidence of immunocompetence < or = +/- was 48%, whereas all patients on CYA + ketoconazole had an immunocompetence score < or = +/- (p = 0.03, chi 2). This degree of immunosuppression contrasted strikingly with the chemical levels, which for those on ketoconazole were in the low acceptable area (182.3 +/- 77.1 ng/ml range from 67 to 230 ng/ml). Therefore, patients using low-dose CYA plus ketoconazole to inhibit metabolism were more immunosuppressed than those receiving conventional CYA treatment, in spite of comparable CYA blood levels. If confirmed, this unexpectedly depressed immunocompetence in these patients would warrant caution in general regarding interpretation of trough blood levels in patients receiving CYA that are also being treated with agents that alter P450 activity.
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Affiliation(s)
- T Watanabe
- Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, Maryland 21287-8611, USA
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Briggs WA, Gao ZH, Xing JJ, Scheel PJ, Gimenez LF, Samaniego MD, Choi MJ, Burdick JF. Suppression of dialysis patients' lymphocyte IL-2R expression by glucocorticoids and cyclosporine. Cytokine 1997; 9:624-8. [PMID: 9245491 DOI: 10.1006/cyto.1997.0210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 02/04/2023]
Abstract
Previous studies have shown interindividual heterogeneity in the suppressive effects of glucocorticoids and cyclosporine (CsA) on the proliferation responses of dialysis patients' peripheral blood mononuclear cells (PBMC). In addition, methylprednisolone (MP) was shown to be significantly more suppressive than prednisolone (P), and PBMC from patients on peritoneal dialysis (PD) were found to be more sensitive to both glucocorticoids than those from patients on haemodialysis (HD). In order to begin to explore the cellular mechanism(s) underlying these observations, the differential suppressive effects of these drugs on lymphocyte interleukin 2 receptor (IL-2R) expression by mitogen-stimulated PBMC from 23 PD and 30 HD were determined. The mean+/-SD concentrations (ng/ml) of steroid causing 50% inhibition (IC50) of cell proliferation was significantly lower for PD than HD PBMC with both P (94+/-93 vs 148+/-105, P<0.05) and MP (21+/-25 vs 35+/-31, P<0.05). MP was significantly (P<0.001) more suppressive than P of IL-2R expression in both PD and HD. PD IL-2R expression was significantly (P<0.05) more suppressed by CsA alone and by 400 ng/ml CsA+10(-7) MP than was HD IL-2R expression. CsA+10(-7) M MP was significantly (P<0.001) more suppressive of IL-2R expression than the other drugs, alone or in combination, in both groups of patients. In conclusion, these results support the notion that at least one mechanism underlying the significantly greater efficacy of MP compared to P in suppressing PBMC proliferation is its significantly greater suppression of lymphocyte IL-2R expression, either alone or in combination with CsA. Thus, use of MP following allograft transplantation may result in more effective immunosuppression for many recipients.
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Affiliation(s)
- W A Briggs
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Briggs WA, Gao ZH, Xing JJ, Scheel PJ, Burdick JF. Differential glucocorticoid responsiveness of hemodialysis patients' lymphocytes. ASAIO J 1997; 43:31-4. [PMID: 9116350] [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: 02/04/2023] Open
Abstract
Acute allograft rejection remains a problem after renal transplantation, even in the cyclosporine era. Interindividual differences in the pharmacodynamic responses of the immune system to immunosuppressive agents might contribute to the vulnerability of some patients to rejection. Having previously demonstrated decreased sensitivity of hemodialysis patients' lymphocytes to glucocorticoid suppression of mitogen induced proliferation, the authors undertook a separate study to assess the suppressive effect of glucocorticoids on lymphocyte responsiveness to allogeneic cells and mitogenic stimulation. Lymphocytes were isolated from 32 hemodialysis patients in clinically stable condition for studies in both phytohemagglutinin (PHA) stimulated cultures and in one-way mixed lymphocyte (MLR) cultures. From the concentration-response relationships derived from stimulated cultures with 10 (-6), 10(-7), and 10(-8) M concentrations of prednisolone and methylprednisolone, the concentration of steroid required to achieve 50% inhibition (IC50) of lymphocyte proliferation was determined. A broad range of IC50 values was found in both PHA and MLR cultures, but within individual patients, the IC50 values for both steroids correlated significantly between PHA and MLR cultures. The inhibitory effect of methylprednisolone was significantly greater than that of prednisolone in both PHA and MLR cultures. These results demonstrate a heterogeneity of pharmacodynamic responsiveness to prednisolone and methylprednisolone that is consistent with individuals in two in vitro models of cellular immune response. Pretransplant evaluation by these methods may help identify patients at risk of suboptimal immunosuppression and assist in selecting the steroid component of the immunosuppressive regimen.
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Affiliation(s)
- W A Briggs
- Department of Medicine, Johns Hopkins Hospital, Baltimore, Maryland, USA
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Briggs WA, Gao ZH, Xing JJ, Gimenez LF, Samaniego MD, Scheel PJ, Choi MJ, Burdick JF. Suppression of lymphocyte interleukin-2 receptor expression by glucocorticoids, cyclosporine, or both. J Clin Pharmacol 1996; 36:931-7. [PMID: 8930780 DOI: 10.1002/j.1552-4604.1996.tb04760.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 02/03/2023]
Abstract
Although glucocorticoids and cyclosporine are frequently used to treat patients with various types of glomerulopathy, clinical responses to treatment vary considerably. Considerable interindividual heterogeneity in the suppressive effects of glucocorticoids on lymphocyte proliferation in vitro has been previously reported, suggesting that differences in the pharmacodynamic responsiveness of the immune system to these agents might be an important determinant of how well an individual patient responds to treatment. It also has been shown that methylprednisolone is significantly more suppressive than prednisolone. To identify cellular mechanisms by which these drugs act, a study of the suppressive effects of prednisolone, methylprednisolone, and cyclosporine on lymphocyte proliferation and the expression of the cell surface receptor for interleukin-2 (IL-2R) was conducted using phytohemagglutin-stimulated peripheral blood mononuclear cells (PBMCs) from 13 patients with glomerulopathy and 12 control subjects. Heterogeneity among individuals in both parameters of lymphocyte responsiveness to these drugs was again found, and the significantly greater suppressive effect of methylprednisolone was confirmed for both proliferation and IL-2R expression in patients and control subjects. Cyclosporine alone was moderately suppressive. For most individuals, the greatest degree of suppression occurred when cells were exposed to both cyclosporine and glucocorticoid. Further studies are being conducted to determine whether pretreatment assessment of in vitro lymphocyte responsiveness has any predictive value regarding therapeutic efficacy of each drug in individual patients and to identify of those patients likely to require a more intensive or multidrug immunosuppressive regimen.
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Affiliation(s)
- W A Briggs
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Briggs WA, Gao ZH, Xing JJ, Scheel PJ, Gimenez LF, Choi MJ, Burdick JF. Differential suppression of dialysis patients' lymphocyte IFN-gamma production by glucocorticoids and cyclosporine. Cytokine 1996; 8:804-8. [PMID: 8980883 DOI: 10.1006/cyto.1996.0107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 02/03/2023]
Abstract
IFN-gamma is a potent pro-inflammatory cytokine involved in the immunologic rejection of transplanted organs. Having previously demonstrated differential suppressive effects of methylprednisolone (MP), prednisolone (P) and cyclosporine (CsA) on dialysis patients' lymphocyte proliferative responses to phytohaemagglutinin (PHA), we studied the effects of these drugs on dialysis patients' lymphocyte IFN-gamma production during mitogenic and allogeneic (MLR) stimulation. The mean +/- SEM 50% inhibitory concentration (ng/ml) on cell proliferation was significantly lower for MP than P in PHA-stimulated haemodialysis (HD) patients' (35 +/- 7 vs 152 +/- 25, P < 0.001) and peritoneal dialysis (PD) patients' (35 +/- 11 vs 134 +/- 33, P = 0.001) cultures and in HD patients' MLR cultures (15 +/- 3 vs 48 +/- 9, P < 0.001). The mean +/- SEM fractional responses (PHA or MLR + drug/PHA or MLR) in culture supernatant IFN-gamma concentrations were significantly lower with 10(-7) M concentrations of MP than P in HD (0.19 +/- 0.05 vs 0.31 +/- 0.06, P = 0.01) and PD (0.30 +/- 0.11 vs 0.46 +/- 0.11, P < 0.05) PHA cultures and in HD MLR cultures (0.15 +/- 0.04 vs 0.28 +/- 0.07, P = 0.01). CsA (400 ng/ml) alone not only caused less than 50% inhibition of IFN-gamma production in 15/27 HD PHA, 6/14 PD PHA and 4/13 HD MLR cultures, but actually stimulated it in 9 HD and 5 PD PHA cultures. The results suggest that: (1) MP has greater immunosuppressive potential than P for renal transplant recipients; (2) the stimulation of IFN-gamma by CsA in some patients could be harmful in patients with initial allograft dysfunction; and (3) pre-transplant in-vitro assessment of recipients' PBMC responsiveness to glucocorticoids and CsA may help individualize the post-transplant immunosuppressive regimen.
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Affiliation(s)
- W A Briggs
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Briggs WA, Gao ZH, Xing JJ, Scheel PJ, Gimenez LF, Burdick JF. Heterogeneity of dialysis patient lymphocyte responses to cyclosporine. Transplant Proc 1996; 28:2063-5. [PMID: 8769157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- W A Briggs
- Department of Nephrology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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Abstract
The reason why some patients with glomerular diseases respond to steroid treatment and others do not remains obscure, and it is not possible to prospectively evaluate the probability of response in individual patients. One factor that might contribute to the clinical response to treatment could be the relative sensitivity of a patient's immune system to the suppressive effects of steroids or other immunosuppressive agents. To evaluate this possibility, phytohemagglutinin (PHA)-stimulated peripheral blood mononuclear cells (PBMC) from 16 patients with various biopsy-proven glomerulopathies were cultured with prednisolone or methylprednisolone in final concentrations of 10(-5) to 10(-8) mol/L. From the dose-response curves, the concentration of steroid required to cause 50% inhibition (IC50) of the PHA-induced proliferative response was determined. The PBMC from 10 patients also were cultured with 400 ng/mL cyclosporine both alone and with 10(-7) mol/L steroid, and the inhibitory effects were calculated. There was considerable heterogeneity in the sensitivities of individual patients to steroid inhibition, and the mean +/- SEM IC50 was significantly lower for methylprednisolone than for prednisolone. Cyclosporine caused 50% or greater inhibition in 6 of the 10 patients but had < 10% inhibitory effect in 2 patients. In most patients studied, cyclosporine plus steroid was significantly more inhibitory than cyclosporine alone, but the combination was usually no more effective than 10(-7) mol/L methylprednisolone alone. These results are consistent with the hypothesis that differences in the sensitivity of individual patient's immune systems to the immunosuppressive effects of steroids and cyclosporine might contribute to differences in their clinical responsiveness to treatment.
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Affiliation(s)
- W A Briggs
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Briggs WA, Gao ZH, Scheel PJ, Burdick JF, Gimenez LF, Choi MJ. Differential glucocorticoid responsiveness of dialysis patients' lymphocytes. ARCH ESP UROL 1996; 16:406-11. [PMID: 8863335] [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: 02/02/2023]
Abstract
OBJECTIVES To evaluate in vitro glucocorticoid responsiveness of phytohemagglutinin (PHA)-stimulated lymphocytes from peritoneal dialysis (PD) patients compared to hemodialysis (HD) patients. DESIGN Cross-sectional study of prevalent PD and HD patients and concurrent control subjects. SETTING Urban outpatient dialysis unit. PATIENTS 20 HD, 14 PD, and 20 control subjects. MEASUREMENTS Using standard lymphocyte culture techniques, the concentration of prednisolone (P) and methylprednisolone (MP) required to cause 50% inhibition (IC50) of the proliferative response to phytohemagglutinin (PHA) was determined from dose-response curves. RESULTS There was considerable heterogeneity in the sensitivities of individual patients' PBMC to glucocorticoid inhibition, especially those of HD patients' cells to P. The mean +/- SD IC50 for MP was significantly (p < or = 0.001) lower than that for P in each cohort: PD 11 +/- 5 vs. 34 +/- 18 ng/mL; HD 22 +/- 14 vs. 89 +/- 43 ng/mL; control subjects 14 +/- 11 vs. 55 +/- 56 ng/mL. Interestingly, the IC50 for both P and MP was significantly higher in HD than in either PD or controls (ANOVA, P: F = 6.56, p = 0.003; MP: F = 3.77, p = 0.03), indicating decreased sensitivity of HD lymphocytes to both drugs. There were no significant differences in mean IC50 values for either P or MP between PD and controls. No correlations were found between IC50 for either P or MP and patient age, gender, duration of dialysis, serum creatinine, serum albumin, or parathyroid hormone level. CONCLUSIONS In vitro glucocorticoid responsiveness of dialysis patients' lymphocytes appears to be influenced by dialysis modality, but the factor(s) involved remains to be determined. The greater sensitivity of PD lymphocytes to both P and MP might result in better immunosuppression and less severe rejection after renal transplantation. MP may be particularly advantageous following renal transplantation for any patient manifesting relative or absolute in vitro resistance to P.
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Affiliation(s)
- W A Briggs
- Department of Medicine, Johns Hopkins University, School of Medicine, Baltimore, Maryland 21205, USA
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Gao ZH, Shukla AJ, Johnson JR, Crowley WR. Controlled release of a contraceptive steroid from biodegradable and injectable gel formulations: in vitro evaluation. Pharm Res 1995; 12:857-63. [PMID: 7667190 DOI: 10.1023/a:1016209020160] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [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: 01/26/2023]
Abstract
PURPOSE The purpose of this study was to investigate the effects of formulation factors including varying wax concentration, drug loading and drug particle size, on drug release characteristics from both pure oil and gel formulations prepared with a combination of derivatized vegetable oil (Labrafil 1944 CS) and glyceryl palmitostearate (Precirol ATO 5), using levonorgestrel as a model drug. METHODS The effects of varying drug loadings, different drug particle sizes, and wax (Precirol) concentrations on in-vitro drug release rates were evaluated, and the mechanisms of drug release from the gels were determined. RESULTS Zero-order drug release rates from the 10% Precirol gel formulations containing 0.25, 0.50 and 2.00% w/v drug loadings were lower than those observed for oil formulations containing identical drug loadings. Higher zero-order release rates were observed from formulations containing smaller drug particles suspended in both oil and gel formulations. The mechanism of drug release from gels containing less than 0.25% w/w drug was diffusion-controlled. Increasing the wax concentrations in the gels from 5% w/w to 20% w/w significantly decreased the diffusivity of the drug through the gel formulations and markedly increased the force required to inject the gels from two different sizes of needles. CONCLUSIONS This study shows how modification of the physicochemical properties of the gel formulations by changing the drug particle size, wax concentration and drug loading, affects drug release characteristics from the system.
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Affiliation(s)
- Z H Gao
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee, Memphis 38163, USA
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Gao ZH, Crowley WR, Shukla AJ, Johnson JR, Reger JF. Controlled release of contraceptive steroids from biodegradable and injectable gel formulations: in vivo evaluation. Pharm Res 1995; 12:864-8. [PMID: 7667191 DOI: 10.1023/a:1016261004230] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.7] [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: 01/26/2023]
Abstract
PURPOSE The purpose of this study was to investigate in vivo biocompatibility, biodegradability and biological effects of contraceptive steroids, such as levonorgestrel and ethinyl estradiol, released from gels prepared with a combination of derivatized vegetable oil (Labrafil 1944 CS) and glyceryl ester of fatty acids (Precirol ATO 5). METHODS Biocompatibility, biodegradability, and in vivo effects of levonorgestrel and ethinyl estradiol were studied by histologic evaluation of rat tissue, visual estimate of changes in gel size, and assessment of drug effects on reproductive cyclicity of female rats, respectively, following subcutaneous injection of gel formulations. RESULTS Histological evaluation of the tissue samples following an injection of the gel revealed an inflammatory reaction for about 7 days, after which the tissues did not show any inflammatory response. Complete degradation of the gels containing 10% wax was observed between 5 and 6 weeks. Normal rat estrous cycles were completely blocked by the contraceptive steroids released from the gels. Gel formulations containing 0.25% w/w levonorgestrel were more effective in blocking the estrous cycle of female rats compared to the oil formulations containing an identical drug loading. The duration of the biological effect induced by levonorgestrel appears to be dose-related. The gel formulation containing 2.00% ethinyl estradiol was superior to oil formulation containing an identical drug loading in terms of controlling drug release and toxicity. CONCLUSIONS These observations suggest that Labrafil-Precirol gels are biocompatible and biodegradable. Moreover, controlled release of steroids is possible in vivo for a prolonged period of time.
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Affiliation(s)
- Z H Gao
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee, Memphis 38163, USA
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Gao ZH, Zhi G, Herring BP, Moomaw C, Deogny L, Slaughter CA, Stull JT. Photoaffinity labeling of a peptide substrate to myosin light chain kinase. J Biol Chem 1995; 270:10125-35. [PMID: 7730316 DOI: 10.1074/jbc.270.17.10125] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [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: 01/26/2023] Open
Abstract
The substrate binding properties of skeletal muscle myosin light chain kinase were investigated with a synthetic peptide containing the photoreactive amino acid p-benzoylphenylalanine (Bpa) incorporated amino-terminal of the phosphoacceptor serine (BpaKKRAARATSNVFA). When photolyzed at 350 nm, the peptide was cross-linked stoichiometrically to myosin light chain kinase in a Ca2+/calmodulin-dependent manner. Peptide incorporation into kinase inhibited light chain phosphorylation, and the loss of kinase activity was proportional to the extent of peptide incorporated. After peptide I was incorporated into myosin light chain kinase, it was partially phosphorylated in the absence of Ca2+/calmodulin. The extent of phosphorylation increased in the presence of Ca2+/calmodulin. The cross-linked photoadduct was digested, labeled peptides were purified by high performance liquid chromatography, and sites of covalent modification were determined by amino acid sequencing and analysis. The covalent modification in the catalytic core occurred on Ile-373 (66%) and in a peptide containing residues Asn-422 to Met-437 (14%), respectively. Lys-572 in the autoinhibitory region accounted for 20% of the incorporated label. The coincident covalent modification of the autoinhibitory domain suggests that it is located near the catalytic site. Based upon a model of the catalytic core, the substrate peptide is predicted to bind in the cleft between the two lobes of the kinase. The orientation of the substrate peptide on myosin light chain kinase is similar to the orientation of the substrate recognition fragment, but not the high affinity binding fragment, of inhibitor peptide of cAMP-dependent protein kinase in the catalytic subunit of the cAMP-dependent protein kinase.
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Affiliation(s)
- Z H Gao
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas 75235, USA
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