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Ye Y, Zheng L, Hong L, García Sakai V, de Souza NR, Teng D, Wu B, Xu Y, Cai J, Liu Z. Direct Observation of the Mutual Coupling Effect in the Protein-Water-Glycerol Mixture by Combining Neutron Scattering and Selective Deuteration. J Phys Chem B 2024; 128:405-414. [PMID: 38183282 DOI: 10.1021/acs.jpcb.3c05135] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2024]
Abstract
Numerous studies have discussed the impact of cosolvents on the structure, dynamics, and stability of proteins in aqueous solutions. However, the dynamics of cosolvents in the protein-water-cosolvent ternary system is largely unexplored in experiments due to technical difficulty. Consequently, a comprehensive understanding of the interplay among proteins, water, and cosolvents is still lacking. Here, we employed selective deuteration and neutron scattering techniques to characterize the individual motions of each component in the protein/water/glycerol (GLY) mixture across various temperatures. The consistent dynamic onset temperatures and the correlation between the MSD of the protein and the viscosity of solvents revealed the mutual coupling effects among the three components. Furthermore, our experimental and simulation results showed that the hydrogen bond relaxation energy barrier in the ternary system is ∼43 kJ/mol, whereas in the protein-water binary system it is merely ∼35 kJ/mol. Therefore, we suggest that GLY can enhance hydrogen bond interactions in the ternary system through the mutual coupling effect, thereby serving as one of the protective mechanisms of protein preservation by GLY.
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Affiliation(s)
- Yongfeng Ye
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lirong Zheng
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liang Hong
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- Shanghai National Centre for Applied Mathematics (SJTU Center), MOE-LSC, Shanghai Jiao Tong University, Shanghai 200240, China
- Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai 201203, China
- Shanghai Artificial Intelligence Laboratory, Shanghai 200232, China
| | - Victoria García Sakai
- ISIS Pulsed Neutron and Muon Source, Rutherford Appleton Laboratory, Science & Technology Facilities Council, Didcot OX11 0QX, U.K
| | - Nicolas R de Souza
- Australian Nuclear Science and Technology (ANSTO), Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Dahong Teng
- Organ Transplantation Center, Fujian Medical University Union Hospital, Fuzhou 350000, China
| | - Bin Wu
- Organ Transplantation Center, Fujian Medical University Union Hospital, Fuzhou 350000, China
| | - Yichao Xu
- Organ Transplantation Center, Fujian Medical University Union Hospital, Fuzhou 350000, China
| | - Jinzhen Cai
- Organ Transplantation Center, Fujian Medical University Union Hospital, Fuzhou 350000, China
| | - Zhuo Liu
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- Shanghai National Centre for Applied Mathematics (SJTU Center), MOE-LSC, Shanghai Jiao Tong University, Shanghai 200240, China
- Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai 201203, China
- Shanghai Artificial Intelligence Laboratory, Shanghai 200232, China
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Chen Y, Qi A, Teng D, Li S, Yan Y, Hu S, Du X. Probiotics and synbiotics for preventing postoperative infectious complications in colorectal cancer patients: a systematic review and meta-analysis. Tech Coloproctol 2022; 26:425-436. [PMID: 35348943 DOI: 10.1007/s10151-022-02585-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 01/22/2022] [Indexed: 02/06/2023]
Abstract
BACKGROUND The health benefits of probiotics and synbiotics in healthy adults are well established, but their role in preventing infectious complications after surgery for colorectal cancer remains controversial. The aim of this meta-analysis was to assess the impact of probiotics/synbiotics on the incidence of infectious complications in patients who had surgery for colorectal cancer. METHODS A comprehensive literature search of all randomized control trials (RCTs) was conducted using PubMed, Embase, World Health Organization (WHO) Global Index Medicus, WHO clinical trial registry, and Clinicaltrials.gov. Inclusion criteria included RCTs comparing the use of any strain or dose of a specified probiotic/synbiotic with placebo or a "standard care" control group. The incidence of postoperative infectious complications was analyzed. RESULTS Fourteen RCTs involving 1566 patients (502 receiving probiotics, 273 receiving synbiotics, and 791 receiving placebo) were analyzed. Overall, probiotic or synbiotic administration significantly reduced the risk of developing postoperative infectious complications by 37% (relative risk (RR) = 0.63, 95% confidence interval (CI) 0.54-0.74, p < 0.001). Furthermore, when considering the six different types of postoperative infectious complications (septicemia, incision infection, central line infection, pneumonia infection, urinary infection, and incidence of diarrhea), probiotic or synbiotic administration was beneficial in reducing the incidence of each one of them. The quality of evidence was listed below: incidence of diarrhea (high), septicemia (moderate), incision infection (moderate), pneumonia infection (moderate), urinary infection (moderate), and central line infection (low). However, for the main outcome of infectious complications, we found evidence of possible publication bias, although estimates still showed a reduction following trim-and-fill analysis (RR = 0.72, 95% CI 0.62-0.84, p < 0.001). CONCLUSIONS The use of probiotic/synbiotic supplementation is associated with a significant reduction in the risk of developing postoperative infectious complications in patients who had surgery for colorectal cancer. Additional studies are needed to confirm the findings due to publication bias and low quality of evidence.
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Affiliation(s)
- Y Chen
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Haidian, Beijing, 100853, China
| | - A Qi
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Haidian, Beijing, 100853, China
| | - D Teng
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Haidian, Beijing, 100853, China
| | - S Li
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Haidian, Beijing, 100853, China
| | - Y Yan
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Haidian, Beijing, 100853, China
| | - S Hu
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Haidian, Beijing, 100853, China
| | - X Du
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Haidian, Beijing, 100853, China.
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Li X, Li S, Wu B, Xu Q, Teng D, Yang T, Sun Y, Zhao Y, Li T, Liu D, Yang S, Gong W, Cai J. Landscape of Immune Cells Heterogeneity in Liver Transplantation by Single-Cell RNA Sequencing Analysis. Front Immunol 2022; 13:890019. [PMID: 35619708 PMCID: PMC9127089 DOI: 10.3389/fimmu.2022.890019] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Accepted: 04/11/2022] [Indexed: 12/18/2022] Open
Abstract
Rejection is still a critical barrier to the long-term survival of graft after liver transplantation, requiring clinicians to unveil the underlying mechanism of liver transplant rejection. The cellular diversity and the interplay between immune cells in the liver graft microenvironment remain unclear. Herein, we performed single-cell RNA sequencing analysis to delineate the landscape of immune cells heterogeneity in liver transplantation. T cells, NK cells, B cells, and myeloid cell subsets in human liver and blood were enriched to characterize their tissue distribution, gene expression, and functional modules. The proportion of CCR6+CD4+ T cells increased within an allograft, suggesting that there are more memory CD4+ T cells after transplantation, in parallel with exhausted CTLA4+CD8+ T and actively proliferating MKI67+CD8+ T cells increased significantly, where they manifested heterogeneity, distinct function, and homeostatic proliferation. Remarkably, the changes of CD1c+ DC, CADM+ DC, MDSC, and FOLR3+ Kupffer cells increase significantly, but the proportion of CD163+ Kupffer, APOE+ Kupffer, and GZMA+ Kupffer decreased. Furthermore, we identified LDLR as a novel marker of activated MDSC to prevent liver transplant rejection. Intriguingly, a subset of CD4+CD8+FOXP3+ T cells included in CTLA4+CD8+ T cells was first detected in human liver transplantation. Furthermore, intercellular communication and gene regulatory analysis implicated the LDLR+ MDSC and CTLA4+CD8+ T cells interact through TIGIT-NECTIN2 signaling pathway. Taken together, these findings have gained novel mechanistic insights for understanding the immune landscape in liver transplantation, and it outlines the characteristics of immune cells and provides potential therapeutic targets in liver transplant rejection.
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Affiliation(s)
- Xinqiang Li
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shipeng Li
- Department of General Surgery, Jiaozuo Women's and Children's Hospital, Jiaozuo, China.,The Second Clinical Medical College, Capital Medical University, Beijing, China
| | - Bin Wu
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
| | - Qingguo Xu
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
| | - Dahong Teng
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
| | - Tongwang Yang
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
| | - Yandong Sun
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
| | - Yang Zhao
- Department of Urology Surgery, Peking Union Medical College Hospital, Beijing, China
| | - Tianxiang Li
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
| | - Dan Liu
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
| | - Shuang Yang
- Department of Molecular Biology, Medical College, Nankai University, Tianjin, China
| | - Weihua Gong
- Department of Surgery, Second Affiliated Hospital of School of Medicine, Zhejiang University, Hangzhou, China
| | - Jinzhen Cai
- Organ Transplantation Center, Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Organ Donation and Transplantation, Medical College of Qingdao University, Qingdao, China
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Sun J, Teng D, Li C, Peng S, Mao J, Wang W, Xie X, Fan C, Li C, Meng T, Zhang S, Du J, Gao Z, Shan Z, Teng W. Association between iodine intake and thyroid autoantibodies: a cross-sectional study of 7073 early pregnant women in an iodine-adequate region. J Endocrinol Invest 2020; 43:43-51. [PMID: 31264141 DOI: 10.1007/s40618-019-01070-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 06/04/2019] [Indexed: 12/13/2022]
Abstract
PURPOSE The association between iodine intake and thyroid autoimmunity has been debated, especially in pregnant women. This study aimed to investigate thyroid autoantibodies and their association with iodine intake and hypothyroidism in early pregnancy. METHODS 7073 early pregnant women from an iodine-sufficient region participated in this study. Urinary iodine concentrations (UICs) were measured using an ammonium persulfate method. Serum thyroid peroxidase antibody (TPOAb), thyroglobulin antibody (TgAb), thyroid-stimulating hormone (TSH), free thyroxine (FT4), and Tg were determined using an electrochemiluminescence immunoassay. RESULTS Iodine deficiency (UIC < 100 μg/L) was associated with higher risks of TPOAb positivity [adjusted odds ratio (aOR) = 1.64, 95% confidence interval [CI] (1.29-2.08)] and TgAb positivity [aOR = 1.44, 95% CI (1.16-1.80)]. Women with isolated TPOAb positivity, isolated TgAb positivity, or both TPOAb and TgAb positivity had a 14.64-fold, 7.83-fold, and 44.69-fold increased risk of overt hypothyroidism, and a 4.36-fold, 2.86-fold, and 6.26-fold increased risk of subclinical hypothyroidism, respectively. Moreover, the risks of overt and subclinical hypothyroidism in women with a high TPOAb titer were 16.99 and 4.80 times that in TPOAb-negative women, respectively. The risk of overt hypothyroidism in women with a high TgAb titer was 6.97 times that in TgAb-negative women. CONCLUSIONS Our work demonstrates that iodine deficiency during early pregnancy is an independent risk factor for both TPOAb positivity and TgAb positivity. Furthermore, positivity for both autoantibodies and a high thyroid autoantibody titer are associated with significantly higher risks of overt and subclinical hypothyroidism.
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Affiliation(s)
- J Sun
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - D Teng
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - C Li
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - S Peng
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - J Mao
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - W Wang
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - X Xie
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - C Fan
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China
| | - C Li
- Department of Obstetrics and Gynecology, Shenyang Fifth People's Hospital, Shenyang, 110023, China
| | - T Meng
- Department of Obstetrics and Gynecology, The First Hospital of China Medical University, Shenyang, 110001, China
| | - S Zhang
- Department of Endocrinology, No. 202 Hospital of People's Liberation Army, Shenyang, 110003, China
| | - J Du
- Department of Endocrinology, The First Affiliated Hospital of Dalian Medical University, Dalian, 116044, China
| | - Z Gao
- Department of Endocrinology, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, 116033, China
| | - Z Shan
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China.
| | - W Teng
- Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University, No. 155, North Nanjing Street, Heping District, Shenyang, 110001, China.
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Shen Z, Gu C, Zheng H, Pan C, Deng Y, Du H, Zhu Z, Liu Y, Sun L, Liu Z, Jiang W, Zhang Y, Gao W, Cai J, Zhang J, Shen W, Tang Y, Li Y, Zhang W, Song H, Wang Z, Zhang Y, Yu L, Teng D, Guo Q. [A twenty-year review of clinical liver transplantation]. Zhonghua Wei Zhong Bing Ji Jiu Yi Xue 2019; 31:269-280. [PMID: 30914085 DOI: 10.3760/cma.j.issn.2095-4352.2019.03.004] [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 review the development of adult and pediatric liver transplantation in Tianjin First Center Hospital, and to enhance academic exchanges, improve technological innovation, and jointly promote the progress and maturity in the field of liver transplantation. METHODS The development of liver transplantation in Tianjin First Center Hospital was analyzed. The clinical data of adult and pediatric liver transplantation from September 1998 to September 2018 were collected. The important events and technological innovation achievements of liver transplantation during the 20 years were summarized. RESULTS The first clinical liver transplantation was attempted in Tianjin First Central Hospital in April 1980. The first long-term survival adult liver transplantation in China was completed in 1994 (11 years survival after the operation). The specialized team of liver transplantation was formally established in September 1998. The 20-year clinical exploration and progress reflected the characteristics of era changes and technological innovation during the rapid development of liver transplantation in China. Our center performed liver re-transplantation in January 1999, reduced-size pediatric liver transplantation in August 2000. In May 2001, we organized the formulation for the preventive and treatment plan for hepatitis B recurrence after liver transplantation. We performed combined liver and kidney transplantation in July 2002, split liver transplantation (SLT) in April 2004, the first domino liver transplantation (DLT) in August 2005. Pediatric living donor liver transplantation (LDLT) was initiated in October 2006, adult LDLT was carried out in August 2007. In September 2007, the first living donor combined liver and kidney transplantation from the same donor in Asia was performed. The first domino+living donor double grafts liver transplantation in the world was performed in January 2009. In March 2011, we performed laparoscopically assisted right hepatic lobe liver transplantation (LDLT) with middle hepatic vein. In May 2014, living donor laparoscopic left lateral lobe procurement was successfully established. In April 2016, simultaneous liver, pancreas and kidney multi-organ transplantation was completed. Domino donor-auxiliary liver transplantation was performed in February 2017. In December 2017, extracorporeal membrane oxygenation (ECMO)-supported liver transplantation in a patient with severe pulmonary hypertension was successfully completed. Liver transplantation combined with partial splenectomy was established in April 2018. Cross-domino liver transplantation (hypersensitive kidney transplantation with auxiliary liver transplantation+pediatric liver transplantation) was performed in May 2018. During the 20 years, the team has performed or assisted other centers in Beijing, Shanghai, Guangzhou and Shenzhen to carry out more than 10 000 cases of liver transplantations. A total of 7 043 cases of various types of liver transplantation were performed in the single center of the hospital (6 005 adult liver transplantations and 1 038 pediatric liver transplantations). Concerning adult liver transplantation, the cumulative 1-year, 3-year and 5-year survival rate from September 1998 to March 2003 were 83.1%, 73.0% and 69.0%, from April 2003 to March 2009 were 85.3%, 76.2% and 72.1% and from April 2009 to September 2018 were 87.5%, 79.2% and 75.1%, respectively. The cumulative 1-year, 3-year and 5-year survival rate for pediatric liver transplantation were 93.5%, 92.2% and 90.2%, respectively. The nucleoside (acid) analogue combined with low dose hepatitis B immunoglobulin (HBIG) was developed to prevent the recurrence of hepatitis B after liver transplantation, this plan has reduced the recurrence rate of hepatitis B and the 5-year re-infection rate of hepatitis B virus (HBV) after liver transplantation significantly. The risk assessment system for tumor recurrence after liver transplantation was established and individual treatment method was established based on this assessment system. Continuous exploration and improvement of liver transplantation for liver cancer, liver re-transplantation, liver transplantation with portal vein thrombosis, SLT, DLT and multi-organ combined transplantation have significantly improved the clinical efficacy of patients and the post-operative survival rate. CONCLUSIONS The liver transplantation team of Tianjin First Center Hospital has carried out a scientific and technological exploration on the key problems and technical difficulties of clinical liver transplantation. This work strongly has initiated and promoted the rapid development of liver transplantation in China. The restrictive barrier of hepatitis B recurrence after liver transplantation has been overcome. The risk prevention and control system of tumor recurrence after liver transplantation has been established. A series of innovative achievements that can be popularized have been achieved in the field of complex liver transplantation and expansion of donor liver source. The iterative progress and sustainable development of liver transplantation have been realized.
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Affiliation(s)
- Zhongyang Shen
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Chuan Gu
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Hong Zheng
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Cheng Pan
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Yonglin Deng
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Hongyin Du
- Department of Anesthesiology, Tianjin First Center Hospital, Tianjin 300192, China
| | - Zhijun Zhu
- Organ Transplantation Center, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Yihe Liu
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Liying Sun
- Organ Transplantation Center, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Zhenwen Liu
- Department of Hepatobiliary Surgery, the Fifth Medical Center of PLA General Hospital, Organ Transplantation Center, Beijing 100039, China
| | - Wentao Jiang
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Yamin Zhang
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Wei Gao
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Jinzhen Cai
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Jianjun Zhang
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Wen Shen
- Department of Radiology, Tianjin First Center Hospital, Tianjin 300192, China
| | - Ying Tang
- Department of Ultrasonography, Tianjin First Center Hospital, Tianjin 300192, China
| | - Yanjun Li
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Weiye Zhang
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Hongli Song
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Zhenglu Wang
- Department of Pathology, Tianjin First Center Hospital, Tianjin 300192, China
| | - Yi Zhang
- Department of Pharmacy, Tianjin First Center Hospital, Tianjin 300192, China. Corresponding author: Shen Zhongyang,
| | - Lixin Yu
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Dahong Teng
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
| | - Qingjun Guo
- Organ Transplantation Center, Tianjin First Center Hospital, Tianjin Clinical Medical Research Center for Organ Transplantation, Key Laboratory of National Health Commission for Critical Care and Emergency Medicine, Key Laboratory of Chinese Academy of Medical Sciences for Organ Transplantation, Tianjin Key Laboratory for Organ Transplantation, Tianjin 300192, China
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Bai H, Teng D, Zhang Z. Comparative proteomic profiles of cervical cancer and paired paracancerous tissue and the potential effects of DUSP7 over-expression through inhibiting Ras pathway on the biological characteristics of human cervical cancer cell line. Gynecol Oncol 2018. [DOI: 10.1016/j.ygyno.2018.04.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Li J, Wu B, Teng D, Sun X, Li J, Li J, Zhang G, Cai J. Cobalt-protoporphyrin enhances heme oxygenase 1 expression and attenuates liver ischemia/reperfusion injury by inhibiting apoptosis. Mol Med Rep 2018; 17:4567-4572. [PMID: 29328470 DOI: 10.3892/mmr.2018.8384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 02/27/2017] [Indexed: 11/06/2022] Open
Abstract
The aim of the present study was to investigate the preconditioning effect and underlying mechanisms of cobalt-protoporphyrin (CoPP) in a mouse model of liver ischemia‑reperfusion (I/R) injury. Mice were divided into five groups: Sham‑operated (control), I/R, I/R + CoPP, I/R + CoPP and zinc‑protoporphyrin (ZnPP) and I/R + ZnPP. Serum levels of aspartate transaminase (AST) and alanine aminotransferase (ALT) were detected using commercial kits. The expression of the pro‑apoptotic protein caspase‑3 was detected by immunohistochemistry and the expression levels of the anti‑apoptotic protein B‑cell lymphoma 2 (Bcl‑2) and heme oxygenase 1 (HO‑1) were analyzed by western blotting. Sections of liver tissue were stained with hematoxylin and eosin to observe pathologic alterations. Furthermore, hepatocyte apoptosis was detected using a terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. AST and ALT levels of the CoPP preconditioned group were significantly reduced compared with the IR injury group (P<0.05) and liver damage was attenuated. The expression levels of the pro‑apoptotic protein caspase3 was inhibited and those of HO‑1 and Bcl‑2 were increased in the CoPP group compared with the I/R group; the opposite results were observed in the ZnPP group. Furthermore, the percentage of apoptotic cells as detected by TUNEL was significantly decreased in the CoPP group compared with the I/R group (P<0.05); these protective effects were abrogated by ZnPP. In conclusion, the results of the present study suggested that CoPP may induce HO‑1 overexpression and produce anti‑apoptotic effects in liver I/R injury.
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Affiliation(s)
- Jing Li
- Departments of Transplantation and Gastroenterology, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Bin Wu
- Department of Transplantation, Tianjin First Central Hospital of Tianjin Medical University, Tianjin 300192, P.R. China
| | - Dahong Teng
- Department of Transplantation, Tianjin First Central Hospital of Tianjin Medical University, Tianjin 300192, P.R. China
| | - Xiaoye Sun
- Department of Transplantation, Tianjin First Central Hospital of Tianjin Medical University, Tianjin 300192, P.R. China
| | - Junjie Li
- Department of Transplantation, Tianjin First Central Hospital of Tianjin Medical University, Tianjin 300192, P.R. China
| | - Jiang Li
- Department of Transplantation, Tianjin First Central Hospital of Tianjin Medical University, Tianjin 300192, P.R. China
| | - Guoliang Zhang
- Department of Gastroenterology, Tianjin First Central Hospital of Tianjin Medical University, Tianjin 300192, P.R. China
| | - Jinzhen Cai
- Department of Transplantation, Tianjin First Central Hospital of Tianjin Medical University, Tianjin 300192, P.R. China
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8
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Yang N, Wang X, Teng D, Mao R, Hao Y, Feng X, Wang J. Deleting the first disulphide bond in an arenicin derivative enhances its expression in Pichia pastoris. Lett Appl Microbiol 2017; 65:241-248. [PMID: 28656630 DOI: 10.1111/lam.12770] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 06/01/2017] [Accepted: 06/13/2017] [Indexed: 11/30/2022]
Abstract
The marine antimicrobial peptide NZ17074, a variant of arenicin-3 from Arenicola marina that has broad antimicrobial activity and high bioavailability, can be designed to treat bacterial and fungal diseases. To reduce the toxicity of NZ17074, N6 was designed by replacing a cysteine in positions 3 and 20 with alanine, fused to the C-terminus of the small ubiquitin-like modifier tag (SUMO), and expressed in yeast. SUMO-N6 yielded as much as 921 mg l-1 at 72 h after induction in a fermentor and increased 1·8-fold over SUMO-NZ17074. After cleavage with 30% formic acid and purification by a Sephadex G-25 column, 9·7 mg of the recombinant peptide N6 (rN6) was obtained from one-litre fermentation broth, increasing 1·4-fold over NZ17074. Compared to NZ17074, rN6 displayed almost identical antimicrobial activity with a minimal inhibitory concentration of 0·5, 0·25-0·5, 4, 0·25-16 and 16 μg ml-1 against Escherichia, Salmonella, Pseudomonas, Staphylococcus and Streptococcus strains. Our results indicate that the first disulphide bond, Cys3-Cys20, in NZ17074 is not necessary for antimicrobial activity and that its deletion might reduce toxicity to host cells. These findings may help design new antimicrobial peptides harbouring fewer disulphide bridges and may have more potent activity. SIGNIFICANCE AND IMPACT OF THE STUDY Disulphide bond formation is an important step in the protein expression and can also influence protein secretion. A deletion of the first disulphide bond in NZ17074 increased the secreted level of target protein, and its antimicrobial activity was almost unaffected by the deletion of the first disulphide bond. The first disulphide bond in NZ17074 is favourable for correctly forming another disulphide bond during expression but not necessary for its activity. This may help design and produce a novel class of antimicrobial peptides harbouring fewer disulphide bridges to save the cost.
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Affiliation(s)
- N Yang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - D Teng
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - R Mao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Y Hao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Feng
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - J Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
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9
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Wang J, Li K, Zhang X, Teng D, Ju M, Jing Y, Zhao Y, Li G. The correlation between the expression of genes involved in drug metabolism and the blood level of tacrolimus in liver transplant receipts. Sci Rep 2017; 7:3429. [PMID: 28611384 PMCID: PMC5469744 DOI: 10.1038/s41598-017-02698-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 04/19/2017] [Indexed: 12/14/2022] Open
Abstract
Immunosuppressive medications, such as tacrolimus and mycophenolate mofetil, are commonly used for reducing the risk of organ rejection in receipts of allogeneic organ transplant. The optimal dosages of these drugs are required for preventing rejection and avoiding toxicity to receipts. This study aimed to identify the correlation between the expression profiling of genes involved in drug metabolism and the blood level of tacrolimus in liver transplant receipts. Sixty-four liver transplant receipts were enrolled in this retrospective study. Receipts were divided into low (2–5.9 ng/ml) and high (6–15 ng/ml) tacrolimus groups. Clinical assessment showed that the blood level of tacrolimus was inversely correlated with the liver function evaluated by blood levels of total bilirubin and creatinine. Compared to the high tacrolimus group, expression levels of six cytochrome P450 enzymes, CYP1A1, CYP2B6, CYP3A5, CYP4A11, CYP19A1, and CYP17A1 were significantly higher in the low tacrolimus group. The expression levels of these genes were negatively correlated with the tacrolimus blood level. Enzyme assays showed that CYP3A5 and CYP17A1 exerted direct metabolic effects on tacrolimus and mycophenolate mofetil, respectively. These results support clinical application of this expression profiling of genes in drug metabolism for selection of immunosuppressive medications and optimal dosages for organ transplant receipts.
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Affiliation(s)
- Jianhai Wang
- Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Keqiu Li
- Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Xiaoning Zhang
- Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Dahong Teng
- Department of Hepatobiliary and Liver transplantation Surgery, Tianjin First Central Hospital, Tianjin, 300192, China
| | - Mingyan Ju
- Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Yaqing Jing
- Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Yuxia Zhao
- Basic Medical College, Tianjin Medical University, Tianjin, 300070, China
| | - Guang Li
- Basic Medical College, Tianjin Medical University, Tianjin, 300070, China.
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Wang Z, Gong W, Shou D, Zhang L, Gu X, Wang Y, Teng D, Zheng H. Clonal Origin of Hepatocellular Carcinoma and Recurrence After Liver Transplantation. Ann Transplant 2016; 21:484-90. [PMID: 27487734 DOI: 10.12659/aot.899572] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND This study aimed to determine whether patterns of tumor clonal origin in pluri-nodular hepatocellular carcinoma (PNHC) could serve as an indicator of tumor recurrence following liver transplantation. MATERIAL AND METHODS Tumor tissue samples from 60 PNHC patients who underwent liver transplantation were examined. The diagnosis of patients conformed to the University of California San Francisco (UCSF) standards for pluri-nodular hepatocellular carcinoma. We performed loss of heterozygosity tests at multiple microsatellite sites to determine the clonal origins of the tumors. Clinical information, pathological data, preoperative serum alpha-feto protein (AFP) and postoperative follow-ups were obtained and correlations between the clonal origin of the tumor, tumor-free survival, pathological characteristics, and AFP levels in serum were studied. RESULTS A total of 165 tumor nodules were collected. Tumor clonal origins were identified as intrahepatic metastasis (IM; 41.67%), multicentric occurrence (MO; 55%) or unidentified (3.33%). Three-year tumor-free survival for the IM group was 48% compared to 75.76% in the MO group (p<0.05), while the occurrence of microscopic tumor thrombus was 100% and 3.03% (p<0.05) for these groups, respectively. The degree of tumor differentiation was 80% for the IM group and 18.18% for the MO group (p<0.05), while the mean AFP concentration for these groups was 226.80 μg/L (2.78-3000 μg/L) and 24.59 μg/L (1.16-531. 30 μg/L; p<0.05), respectively. CONCLUSIONS Clonal origin patterns can serve as important indicators to predict the recurrence of PNHC following liver transplantation. Taken together with pathological characteristics and preoperative serum AFP levels, the risk of recurrence can be established in advance.
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Affiliation(s)
- Zhenglu Wang
- Orient Organ Transplant Center, Tianjin First Center Hospital, Tianjin, China (mainland)
| | - Weihua Gong
- Department of Surgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China (mainland)
| | - Dawei Shou
- Department of Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China (mainland)
| | - Luzhou Zhang
- , People's Hospital of Zhucheng City, Zhucheng, Shandong, China (mainland)
| | - Xiangqian Gu
- , First Central Clinical Institute of Tianjin Medical University, Tianjin, China (mainland)
| | - Yuliang Wang
- Orient Organ Transplant Center, Tianjin First Center Hospital, Tianjin, China (mainland)
| | - Dahong Teng
- Orient Organ Transplant Center, Tianjin First Center Hospital, Tianjin, China (mainland)
| | - Hong Zheng
- Orient Organ Transplant Center, Tianjin First Center Hospital, Tianjin, China (mainland)
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11
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Zhang L, Teng D, Chen G, Wang Z, Tang Y, Gao H, Zheng H. [The risk factors of splenic arterial steal syndrome after orthotopic liver transplantation]. Zhonghua Wai Ke Za Zhi 2015; 53:836-840. [PMID: 26813838] [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: 06/05/2023]
Abstract
OBJECTIVE To discuss the risk factors of splenic arterial steal syndrome (SASS) after orthotopic liver transplantation. METHODS Twenty-four cases who confirmed SASS after liver transplantation in Tianjin First Central Hospital between June 2005 and June 2013 were analyzed retrospectively. Another 96 cases were selected randomly from those patients of the same time with no complication of SASS patients postoperatively as control group. Clinical data of two groups including diameter of splenic artery and hepatic artery preoperatively, weight of graft, weight of recipients, cold/warm ischemia time, an hepatic period and operation time and so on were collected. Others including hepatic artery peak systolic velocity (PSV), end diastolic velocity (EDV), blood flow resistance index and portal vein average velocity (PVF) on the first day after liver transplantation, the day before diagnosis, the day when diagnosed, the 1, 3, 7 days after treatment in SASS group and on 1, 3, 7, 9, 11, 14 days after liver transplantation in control group. Statistical analysis were made between two groups. RESULTS The splenic artery/hepatic artery ratio preoperatively and weight of donor liver,and the GRWR in SASS group and control group were 1.26 and 1.00, 1 032 g and 1 075 g, (1.40±0.30)% and (1.82±0.21)% respectively, with significantly statistical differences (Z=-6.40, Z=-2.22, t=-6.50; all P<0.05). The warm ischemia time, the cold ischemia time, the anhepatic period and operation time in SASS group and control group were 3.5 minutes and 4.0 minutes, 10.25 hours and 10.10 hours, 43 minutes and 45 minutes, 8.7 hours and 8.7 hours, with no significantly statistical differences (all P>0.05). RI of hepatic went up gradually in the early time after transplantation while dropped obviously when spleen artery spring coils embolization was received (P<0.01) and trended to stable two weeks later. CONCLUSIONS Splenic artery/hepatic artery ratio and GRWR are the positive and negative risk factors respectively for SASS. The gradual rising of hepatic RI in the early time after transplantation may be the warning signal SASS and spleen artery spring coils embolization is the effective strategy for SASS after liver transplantation.
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Affiliation(s)
- Luzhou Zhang
- First Central Clinic Institute of Tianjin Medical University, Tianjin 300192, China
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12
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Li G, Hou S, Li Y, Liu S, Teng D, Hou D. Surveillance of gram-positive cocci infections and drug resistance. Cell Mol Biol (Noisy-le-grand) 2015; 61:90-93. [PMID: 26386666] [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] [Received: 07/07/2015] [Accepted: 09/07/2015] [Indexed: 06/05/2023]
Abstract
In this study, the prevalence of gram-positive cocci isolates and the characteristics of multiple drug resistances in patients were investigated. Antibiotic resistances were determined in the clinical microbiology laboratory with the methodology of the CLSI (2012). The software WHONET5.4 and SPSS13.0 were used for statistical analysis. There were a total of 6211 gram-positive cocci isolates, comprised of 2255 (36.3%) coagulase (-) staphylococci, 1277 (20.6%) staphylococci aureus, 1109 (17.9%) enterococcus faecalis, and 1045 (16.8%) enterococcus faecium. The proportion of Methicillin resistant staphylococcus aureus (MRSA) was 16.6% (212/1277). Methicillin resistant coagulase (-) staphylococci (MRCNS) was 14.1% (318/2255). There were no strains in isolated enterococci resistant to vancomycin, teicoplanin and linezolid. Among the majority of all monitored antibiotics, methicillin resistant staphylococci has much higher drug resistance rate than methicillin sensitive staphylococci (p<0.05). Enterococcus faecalis has higher multiple drug resistant rate than enterococcus faecium (p<0.01). This research may support the clinicians in prescribing antibiotics properly.
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Affiliation(s)
- G Li
- Hospital Affiliated to the Chinese Academy of Medical Sciences and Peking Union Medical College Office of Hospital Infection Beijing China
| | - S Hou
- New York University Department of mathematics New York USA
| | - Y Li
- Hospital Affiliated to the Chinese Academy of Medical Sciences and Peking Union Medical College The Fifth Department Beijing China
| | - S Liu
- Beijing Yanhua Hospital Office of Hospital Infection Beijing China
| | - D Teng
- Hospital Affiliated to the Chinese Academy of Medical Sciences and Peking Union Medical College Clinical Laboratory Beijing China
| | - D Hou
- Hospital Affiliated to the Chinese Academy of Medical Sciences and Peking Union Medical College Head and Neck department of Plastic Surgery Beijing China dianju_hou@126.com
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13
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Jiang P, Mukthavaram R, Chao Y, Nomura N, Bharati IS, Fogal V, Pastorino S, Teng D, Cong X, Pingle SC, Kapoor S, Shetty K, Aggrawal A, Vali S, Abbasi T, Chien S, Kesari S. In vitro and in vivo anticancer effects of mevalonate pathway modulation on human cancer cells. Br J Cancer 2014; 111:1562-71. [PMID: 25093497 PMCID: PMC4200085 DOI: 10.1038/bjc.2014.431] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/07/2014] [Accepted: 07/09/2014] [Indexed: 12/13/2022] Open
Abstract
Background: The increasing usage of statins (the 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors) has revealed a number of unexpected beneficial effects, including a reduction in cancer risk. Methods: We investigated the direct anticancer effects of different statins approved for clinical use on human breast and brain cancer cells. We also explored the effects of statins on cancer cells using in silico simulations. Results: In vitro studies showed that cerivastatin, pitavastatin, and fluvastatin were the most potent anti-proliferative, autophagy inducing agents in human cancer cells including stem cell-like primary glioblastoma cell lines. Consistently, pitavastatin was more effective than fluvastatin in inhibiting U87 tumour growth in vivo. Intraperitoneal injection was much better than oral administration in delaying glioblastoma growth. Following statin treatment, tumour cells were rescued by adding mevalonate and geranylgeranyl pyrophosphate. Knockdown of geranylgeranyl pyrophosphate synthetase-1 also induced strong cell autophagy and cell death in vitro and reduced U87 tumour growth in vivo. These data demonstrate that statins main effect is via targeting the mevalonate synthesis pathway in tumour cells. Conclusions: Our study demonstrates the potent anticancer effects of statins. These safe and well-tolerated drugs need to be further investigated as cancer chemotherapeutics in comprehensive clinical studies.
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Affiliation(s)
- P Jiang
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - R Mukthavaram
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - Y Chao
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - N Nomura
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - I S Bharati
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - V Fogal
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - S Pastorino
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - D Teng
- Departments of Bioengineering and Medicine and Institute of Engineering in Medicine, UC San Diego, La Jolla, CA 92093, USA
| | - X Cong
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - S C Pingle
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - S Kapoor
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - K Shetty
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - A Aggrawal
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - S Vali
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - T Abbasi
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - S Chien
- Departments of Bioengineering and Medicine and Institute of Engineering in Medicine, UC San Diego, La Jolla, CA 92093, USA
| | - S Kesari
- 1] Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA [2] Department of Neurosciences, UC San Diego, La Jolla, CA 92093, USA
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14
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Wang XJ, Wang XM, Teng D, Zhang Y, Mao RY, Wang JH. Recombinant production of the antimicrobial peptide NZ17074 in Pichia pastoris using SUMO3 as a fusion partner. Lett Appl Microbiol 2014; 59:71-8. [PMID: 24617894 DOI: 10.1111/lam.12246] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 02/18/2014] [Accepted: 03/06/2014] [Indexed: 12/01/2022]
Abstract
UNLABELLED The antimicrobial peptide NZ17074, which is derived from arenicin-3 isolated from Arenicola marina, displayed high activity against a broad range of pathogenic bacteria and fungi. However, NZ17074 has not been produced using fermentation technology. The aim of this work was to study the expression of difficult-to-express NZ17074 in Pichia pastoris by fusing with SUMO3. The DNA fragments of NZ17074 and SUMO3 were fused into SUMO3-NZ17074 using overlap PCR and cloned into the pPICZαA vector to construct the pPICZ-SUMO3-NZ17074 expression vector. The rSUMO3-NZ17074 fusion protein, purified by Ni(2) (+) -chelating affinity chromatography, was cleaved by 50% formic acid at 50°C for 28 h to release recombinant NZ17074 (rNZ17074). After purification with second affinity column, 4·1 mg rNZ17074 peptide with the purity over 90% was obtained from per litre fermentation culture. The rNZ17074 peptide exhibited the significant inhibition activity against Gram-negative bacteria: its minimal inhibitory concentrations (MICs) against Escherichia coli, Salmonella enteritidis and Pseudomonas aeruginosa were 2-4, 2 and 8-16 μg ml(-1) , respectively, which indicated that SUMO3 is a good fusion partner for the expression of the toxic peptide. SIGNIFICANCE AND IMPACT OF THE STUDY Recombinant active NZ17074 was produced with Pichia pastoris by using high-density fermentation technology for the first time. Our findings demonstrated the usefulness of SUMO-fusion technology as an effective expression strategy for synthesizing peptides in yeast. This SUMO3 expression system with a lower cost would likely be widely used for the production of other cytotoxic proteins including antimicrobial peptides.
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Affiliation(s)
- X J Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China; Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
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Abstract
As digital microfluidics-based biochips find more applications, their complexity is expected to increase significantly owing to the trend of multiple and concurrent assays on the chip. There is a pressing need to deliver a top-down design methodology that the biochip designer can leverage the same level of computer-aided design support as the semi-conductor industry now does. Moreover, as microelectronics fabrication technology is scaling up and integrated device performance is improving, it is expected that these microfluidic biochips will be integrated with microelectronic components in next-generation system-on-chip designs. This study presents the analysis and experiments of digital microfluidic operations on a novel electrowetting-on-dielectric-based 'micro-electrode dot array architecture' that fosters a development path for hierarchical top-down design approach for digital microfluidics. The proposed architecture allows dynamic configurations and activations of identical basic microfluidic unit called 'micro-electrode cells' to design microfluidic components, layouts, routing, microfluidic operations and applications of the biochip hierarchically. Fundamental microfluidic operations have been successfully performed by the architecture. In addition, this novel architecture demonstrates a number of advantages and flexibilities over the conventional digital microfluidics in performing advanced microfluidic operations.
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Affiliation(s)
- G Wang
- Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, Canada.
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Dinh A, Teng D, Chen L, Ko SB, Shi Y, Basran J, Del Bello-Hass V. Data acquisition system using six degree-of-freedom inertia sensor and ZigBee wireless link for fall detection and prevention. Annu Int Conf IEEE Eng Med Biol Soc 2009; 2008:2353-6. [PMID: 19163174 DOI: 10.1109/iembs.2008.4649671] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Fall detection and prevention require logged physiological activity data of a patient for a long period of time. This work develops a data acquisition system to collect motion data from multiple patients and store in a data base. A wireless sensor network is built using high precision inertia sensors and low power Zigbee wireless transceivers. Testing results prove the system function properly. Researchers and physicians can now retrieve and analyze the accurate data of the patient movement with ease.
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Affiliation(s)
- A Dinh
- Department of Electrical and Computer Engineering, University of Saskatchewan, Canada.
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Lim EH, Hough C, McKinney J, Zhang S, Martin R, Tan P, Teng D. Mutation detection in lung tumors: Comparing high-resolution melting with direct sequencing. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.19021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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18
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Yu X, Fan C, Shan Z, Teng X, Guan H, Li Y, Teng D, Jin Y, Chong W, Yang F, Dai H, Yu Y, Li J, Chen Y, Zhao D, Shi X, Hu F, Mao J, Gu X, Yang R, Tong Y, Wang W, Gao T, Li C, Teng W. A five-year follow-up study of goiter and thyroid nodules in three regions with different iodine intakes in China. J Endocrinol Invest 2008; 31:243-50. [PMID: 18401207 DOI: 10.1007/bf03345597] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The association between iodine status and the prevalence of goiter and thyroid nodules has been well established but the extent to which different iodine intake levels influence the incidence of goiter and thyroid nodules is unclear. The aim of the study was to determine the incidence of goiter and thyroid nodules in 3 regions with different iodine intake levels: mildly deficient, more than adequate, and excessive. DESIGN, PATIENTS AND MEASUREMENTS Of the 3385 unselected subjects enrolled in 1999 in Panshan, Zhangwu, and Huanghua where median urinary iodine excretion (UIE) was 83.5 microg/l, 242.9 microg/l, and 650.9 microg/l, respectively, 2708 (80.0%) participated in the follow-up study in 2004. The examinations of thyroid ultrasonography, thyroid function, thyroid autoantibodies and UIE were performed at baseline and follow-up. RESULTS The cumulative incidence of diffuse goiter was 7.1%, 4.4%, and 6.9%, respectively, higher in Panshan and Huanghua than in Zhangwu (p=0.013 and p=0.015) and that of nodular goiter was 5.0%, 2.4%, and 0.8%, respectively, declining with increasing iodine intake levels (p<0.001). Mild iodine deficiency, chronic iodine excess as well as positive thyroid autoantibodies were associated with the occurrence of goiter [Logistic regression: odds ratio (OR)=1.83 (95% confidence interval (CI) 1.26-2.65), OR=1.46 (95% CI 1.01-2.11) and OR=1.68 (95% CI 1.14-2.48), respectively]. The cumulative incidence of single nodule was 4.0%, 5.7%, and 5.6%, respectively and that of multiple nodules was 0.4%, 1.2%, and 1.0%, respectively. CONCLUSIONS The relationship between iodine and the risk for the occurrence of diffuse goiter shows a U-shaped curve. Nodular goiters are more prevalent in iodine-deficient areas.
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Affiliation(s)
- X Yu
- Institute of Endocrinology, First Hospital Affiliated to China Medical University, Shenyang, Liaoning Province, PR China
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Teng D, Lu Y, Gao R, Xin Y, Cao G, Li X, Wang L, Wang J, Wang L, Li Y. Conversion from cyclosporine to mycophenolate mofetil improves expression of A20 in the rat kidney allografts undergoing chronic rejection. Transplant Proc 2006; 38:2164-7. [PMID: 16980032 DOI: 10.1016/j.transproceed.2006.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 02/05/2023]
Abstract
AIMS Cytoprotective genes have shown to display potent anti-inflammatory and antiapoptotic functions in endothelial and smooth muscle cells. We investigated whether cytoprotective genes, especially A20, were involved in mycophenolate mofetil (MMF)'s ability to ameliorate transplant arteriosclerosis in an experimental chronic rejection model. METHODS Sprague-Dawley rat renal grafts were orthotopically transplanted into Wistar rats following the procedure of Kamada with our modification. The recipients were divided into three oral treatment groups: (1) vehicle group (cyclosporine [CsA] 10 mg/kg.d x 10 d followed by vehicle), (2) CsA group (CsA 10 mg/kg.d x 10 d followed by CsA 6 mg/kg.d), (3) MMF group (converted from CsA 10 mg/kg.d x 10 d to MMF 20 mg/kg.d on day 11). At the same time points after transplantation, the rats were sacrificed to harvest the renal allografts. The expression of four cytoprotective genes, A20, heme oxygenase (HO)-1, Bcl-2, and Bcl-XL, was analyzed by quantitative reverse-transcriptase polymerase chain reaction and immunohistochemistry. RESULTS The four-cytoprotective genes were all detected in rat kidney allografts undergoing chronic allograft nephropathy. The expression of A20 in grafted kidneys was significantly higher in the MMF than in the CsA or the vehicle group (P < .01). There was no significant difference between the CsA and the MMF groups in the expression of HO-1, Bcl-2, and Bcl-XL. CONCLUSIONS We demonstrated that MMF improved the expression of A20 in rat kidney allografts undergoing chronic allograft nephropathy. The correlation between MMF and A20 provide an explanation for the mechanism by which MMF ameliorates transplant arteriosclerosis in an experimental animal model of chronic rejection.
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Affiliation(s)
- D Teng
- Transplantation Institute, West China Hospital, Sichuan University, Guoxuexiang 37, Chengdu 610041, P.R. China
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Abstract
AIM Serum cystatin C (SCysC) has been proposed as a better marker of glomerular filtration rate (GFR) than serum creatinine (Scr). However, few data are available in renal transplant patients, especially, during the early postoperative phase. METHODS Thirty-nine renal transplant patients (22 men/17 women) were recruited for determination of SCysC and Scr before operation, at 1 week and at 4 weeks after operation. SCysC was determined by particle-enhanced turbidimetric immunoassay. Creatinine clearance (Ccr) was calculated using the Cockcroft-Gault formula. RESULTS SCysC and Scr levels significantly decreased with the recovery of allograft function. SCysC showed a significant correlation with Scr and Ccr. The relationship between SCysC and Scr showed a positive correlation (r = .849 preoperation, and r = .940 postoperation). The relationship between SCysC and Ccr revealed a negative correlation (r = .857 preoperation, and r = .876 postoperation). At the Ccr level of 50 to 80 mL/min/1.73 m(2), the correlation between SCysC and Ccr (r = .778) was significantly better than that between Scr and Ccr (r = .553; P = .032). The concentration of SCysC was not affected by age, gender, height, body weight, hemoglobin, serum protein, glucose, or mycophenolate mofetil or azathioprine dosage. However, corticosteroids slightly increased the level of SCysC and cyclosporine (CsA) decreased it. The area under the curve of the receiver operating characteristic curve for SCysC and Scr are 0.964 and 0.915, respectively (P < .05). CONCLUSION Although the concentration may be slightly influenced by prednisolone and CsA, SCysC is more sensitive than Scr to detect early and moderate deterioration of GFR in adult renal transplant recipients.
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Affiliation(s)
- H Xu
- Transplantation Institute, West China Hospital, Sichuan University, Chengdu, China 610041
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Cao G, Lu Y, Gao R, Xin Y, Teng D, Wang J, Li Y. Expression of fractalkine, CX3CR1, and vascular endothelial growth factor in human chronic renal allograft rejection. Transplant Proc 2006; 38:1998-2000. [PMID: 16979977 DOI: 10.1016/j.transproceed.2006.06.081] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 02/05/2023]
Abstract
AIM Fractalkine/CX3CR1 system may contribute to the pathogenesis of renal allograft chronic rejection (CR). Vascular endothelial growth factor (VEGF) is an endothelial mitogen, which shows increased expression in inflammation and vasculopathy. This study sought describe the expression and distribution of Fractalkine/CX3CR1 and VEGF, and their relationship to human renal allograft CR. METHODS Renal tissue from 10 patients with CR was examined for Fractalkine/CX3CR1 and VEGF protein by immunohistochemistry for comparison with patients displaying hyperacute rejection (n = 10), acute rejection (n = 10), and normal kidneys (n = 10). All patients were selected based upon histologically proven diagnoses between 1992 and 2003. RESULTS Immunohistochemistry revealed that Fractalkine/CX3CR1 were mostly expressed in the tubulointerstitium and tubular epithelial cell basolateral membrane. Some vessels showed positive staining for Fractalkine/CX3CR1 as well as occasionally glomerular parietal wall cells. Among the CR group, VEGF was mostly expressed in tubular epithelium and the tubulointerstitium. A proportion of glomeruli and vessels had positive staining for VEGF, which was up-regulated most strikingly in the interstitial compartment in CR. There was markedly increased expression of Fractalkine/CX3CR1 and VEGF protein in the interstitium of the CR compared with other groups (P < .05). VEGF colocalized with the expression of Fractalkine/CX3CR1. CONCLUSION Fractalkine/CX3CR1 and VEGF may play an important role in the development of interstitial fibrosis via mononuclear cell-induced cytokine production and myofibroblast stimulation in CR. Further studies are necessary to identify the role in the pathogenesis of CR.
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Affiliation(s)
- G Cao
- Transplantation Institute, West China Hospital, Sichuan University, Chengdu/Sichuan, China 610041
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Cao G, Lu Y, Gao R, Xin Y, Teng D, Wang J, Wang L, Li Y. Comparison of cyclosporine versus mycophenolate mofetil on expression of Fractalkine and CX3CR1 in chronic allograft nephropathy. Transplant Proc 2006; 38:2234-6. [PMID: 16980051 DOI: 10.1016/j.transproceed.2006.06.046] [Citation(s) in RCA: 2] [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: 02/05/2023]
Abstract
INTRODUCTION We sought to investigate whether there was a difference between cyclosporine (CsA) and mycophenolate mofetil (MMF) to affect the expression of Fractalkine/CX3CR1 in chronic allograft nephropathy (CAN). METHODS The Sprague-Dawley Wistar rat accelerated kidney sclerosis model was performed as modified from the procedure of Kamada. Recipients were divided into three oral treatment groups (each group n = 8): group A was CsA 10 mg/kg . d for 10 days followed by vehicle; group B was CsA 10 mg/kg . d for 10 days followed by CsA 6 mg/kg.d; group C was CsA 10 mg/kg . d for 10 days followed by MMF 20 mg/kg . d. Pathological changes graded according to Banff 97 Standards were observed at 4, 8, and 12 weeks posttransplantation. The immunohistochemistry and quantitative real-time fluorescence polymerase chain reaction (PCR) were used to assess the distribution and expression of Fractalkine/CX3CR1 in the grafted kidney. RESULTS Fractalkine/CX3CR1 were mostly expressed in the tubulointerstitium and tubular epithelial cell basolateral membrane. A proportion of the vessel showed positive staining for Fractalkine/CX3CR1, occasionally in glomerular parietal wall cells. The expression of Fractalkine/CX3CR1 in grafted kidneys at all the time points was significantly less in the MMF than in the CsA group or the control group (P < .05). Real-time fluorescence quantitative PCR revealed similar outcomes as immunohistochemistry. The expression of Fractalkine coincided with CX3CR1. CONCLUSION Fractalkine/CX3CR1 may play an important role in the development of interstitial fibrosis in CAN. Different immunosuppressants have various effects on expression of the Fractalkine/CX3CR1.
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Affiliation(s)
- G Cao
- Transplantation Institute, West China Hospital, Sichuan University, Guoxuexiang 37, Chengdu 610041, P.R. China
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Teng D, Lu Y, Gao R, Xin Y, Cao G, Li X, Wang L, Wang J, Li Y. Comparison of rapamycin versus FK506 on expression of cytoprotective genes in the rat kidney allografts undergoing chronic allograft nephropathy. Transplant Proc 2006; 38:2172-5. [PMID: 16980034 DOI: 10.1016/j.transproceed.2006.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 02/05/2023]
Abstract
AIMS It is increasingly recognized that expression of cytoprotective genes in grafts can affect the progress of chronic allograft nephropathy (CAN). Little is known about the influence of different immunosuppressive regimens on expression of cytoprotective genes in allografts undergoing CAN. We investigate whether there is difference between rapamycin (Rapa) and FK506 in the expression of cytoprotective genes in rat kidney allografts undergoing CAN. METHODS Sprague-Dawley rat renal grafts were orthotopically transplanted into Wistar rats following the procedure of Kamada with our modification. The recipients were divided into three oral treatment groups: group 1: vehicle group (cyclosporine [CsA] 10 mg/kg.dx 10 days followed by vehicle); group 2: Rapa group (CsA 10 mg/kg.d x 10 d followed by Rapa 0.8 mg/kg.d); group 3: FK506 group (CsA 10 mg/kg.d x 10 d followed by FK506 0.15 mg/kg.d). At the same times after transplantation, the rats were sacrificed to harvest the renal allografts. The expression of four cytoprotective genes, A20, heme oxygenase (HO)-1, Bcl-2, and Bcl-X/L were analyzed in these grafted kidneys by quantitative reverse transcriptase polymerase chain reaction and immunohistochemistry. RESULTS Four cytoprotective genes were all detected in rat kidney allografts undergoing CAN. The expression of A20 in the Rapa group was significantly higher than that in the FK506 or the vehicle group (P < .05). There was no significant difference between the Rapa group and FK506 group in the expressions of HO-1, Bcl-2, and Bcl-X/L. CONCLUSIONS We demonstrate that various immunosuppressive agents have different effects on the expression of cytoprotective genes.
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Affiliation(s)
- D Teng
- Transplantation Institute, West China Hospital, Sichuan University, Guoxuexiang 37, Chengdu 610041, P.R. China
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Zhou YP, Teng D, Dralyuk F, Ostrega D, Roe MW, Philipson L, Polonsky KS. Apoptosis in insulin-secreting cells. Evidence for the role of intracellular Ca2+ stores and arachidonic acid metabolism. J Clin Invest 1998; 101:1623-32. [PMID: 9541492 PMCID: PMC508743 DOI: 10.1172/jci1245] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.1] [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: 01/31/2023] Open
Abstract
This study investigated the role of intracellular free Ca2+ concentration ([Ca2+]i) in apoptosis in MIN6 cells, an insulin secreting cell line, and in mouse islets. Thapsigargin, an inhibitor of sarcoendoplasmic reticulum Ca2+-ATPases (SERCA), caused a time- and concentration-dependent decrease in the viability of MIN6 cells and an increase in DNA fragmentation and nuclear chromatin staining changes characteristic of apoptosis. Two structurally distinct SERCA inhibitors, cyclopiazonic acid and 2,5-di-[t-butyl]-1,4-hydroquinone also caused apoptosis, but agents that increased [Ca2+]i by other mechanisms did not induce apoptosis in MIN6 cells. Carbachol- or ionomycin-releasible intracellular Ca2+ stores were completely depleted in cells treated by SERCA inhibitors, but not by other agents that increase [Ca2+]i. The ability of thapsigargin to induce cell death was not affected by blocking Ca2+ influx or by clamping [Ca2+]i with a cytosolic Ca2+ buffer suggesting that the process did not depend on changes in [Ca2+]i per se. However, application of the lipoxygenase inhibitors 5,8,11-eicosatrienoic acid and nordihydroguaiaretic acid partially prevented MIN6 cell apoptosis, while exposure of cells to the product of lipoxygenase, 12-hydroxy-[5,8,10,14]-eicosatetraenoic acid, caused apoptosis. In contrast, inhibition of cyclooxygenase with indomethacin did not abolish thapsigargin-induced apoptosis in MIN6 cells. Our findings indicate that thapsigargin causes apoptosis in MIN6 cells by depleting intracellular Ca2+ stores and leading to release of intermediate metabolites of arachidonic acid metabolism.
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Affiliation(s)
- Y P Zhou
- Department of Medicine, Section of Endocrinology, The University of Chicago, Chicago, Illinois 60637, USA
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Tavtigian SV, Simard J, Rommens J, Couch F, Shattuck-Eidens D, Neuhausen S, Merajver S, Thorlacius S, Offit K, Stoppa-Lyonnet D, Belanger C, Bell R, Berry S, Bogden R, Chen Q, Davis T, Dumont M, Frye C, Hattier T, Jammulapati S, Janecki T, Jiang P, Kehrer R, Leblanc JF, Mitchell JT, McArthur-Morrison J, Nguyen K, Peng Y, Samson C, Schroeder M, Snyder SC, Steele L, Stringfellow M, Stroup C, Swedlund B, Swense J, Teng D, Thomas A, Tran T, Tranchant M, Weaver-Feldhaus J, Wong AK, Shizuya H, Eyfjord JE, Cannon-Albright L, Tranchant M, Labrie F, Skolnick MH, Weber B, Kamb A, Goldgar DE. The complete BRCA2 gene and mutations in chromosome 13q-linked kindreds. Nat Genet 1996; 12:333-7. [PMID: 8589730 DOI: 10.1038/ng0396-333] [Citation(s) in RCA: 546] [Impact Index Per Article: 19.5] [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: 01/31/2023]
Abstract
Breast carcinoma is the most common malignancy among women in developed countries. Because family history remains the strongest single predictor of breast cancer risk, attention has focused on the role of highly penetrant, dominantly inherited genes in cancer-prone kindreds (1). BRCA1 was localized to chromosome 17 through analysis of a set of high-risk kindreds (2), and then identified four years later by a positional cloning strategy (3). BRCA2 was mapped to chromosomal 13q at about the same time (4). Just fifteen months later, Wooster et al. (5) reported a partial BRCA2 sequence and six mutations predicted to cause truncation of the BRCA2 protein. While these findings provide strong evidence that the identified gene corresponds to BRCA2, only two thirds of the coding sequence and 8 out of 27 exons were isolated and screened; consequently, several questions remained unanswered regarding the nature of BRCA2 and the frequency of mutations in 13q-linked families. We have now determined the complete coding sequence and exonic structure of BRCA2 (GenBank accession #U43746), and examined its pattern of expression. Here, we provide sequences for a set of PCR primers sufficient to screen the entire coding sequence of BRCA2 using genomic DNA. We also report a mutational analysis of BRCA2 in families selected on the basis of linkage analysis and/or the presence of one or more cases of male breast cancer. Together with the specific mutations described previously, our data provide preliminary insight into the BRCA2 mutation profile.
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