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Zhang B, Ji S, Ma F, Ma Q, Lu X, Chen X. miR-489 acts as a tumor suppressor in human gastric cancer by targeting PROX1. Am J Cancer Res 2016; 6:2021-2030. [PMID: 27725907 PMCID: PMC5043111] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 08/09/2016] [Indexed: 06/06/2023] Open
Abstract
Dysregulation of microRNAs (miRNAs) are linked to tumorigenesis and tumor progression. In this study, we examined the expression of miR-489 in gastric cancer tissues and cells. Loss- and gain-of-function experiments were done to determine the roles of miR-489 in gastric cancer cell proliferation and invasion. Bioinformatic prediction, luciferase reporter assays, and Western blot analysis were employed to identify the target gene(s) of miR-489. We found that miR-489 was significantly (P < 0.05) downregulated in human gastric cancer tissues and cell lines, compared to their non-malignant counterparts. Enforced expression of miR-489 significantly suppressed gastric cancer cell proliferation and invasion, while miR-489 knockdown enhanced the aggressive behaviors of gastric cancer cells. Prospero homeobox 1 (PROX1) was identified to be a direct target of miR-489. A significant negative correlation was seen between miR-489 and PROX1 protein expression in gastric cancer tissues (r = -0.462, P = 0.023). Silencing of PROX1 phenocopied the suppressive effects of miR-489 in gastric cancer cells. Rescue experiments demonstrated that overexpression of a miR-489-resistant form of PROX1 significantly prevented the reduction in cell proliferation and invasion induced by miR-489 overexpression. In vivo studies confirmed that miR-489 overexpression retarded the growth of xenograft tumors, which was accompanied by reduced PROX1 expression. Overall, these data provide evidence for the suppressive activity of miR-489 in gastric cancer, which is ascribed to targeting of PROX1. The miR-489/PROX1 axis may represent a potential therapeutic target for this disease.
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Affiliation(s)
- Bin Zhang
- Department of General Surgery, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University Zhengzhou, China
| | - Sheqing Ji
- Department of General Surgery, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University Zhengzhou, China
| | - Fei Ma
- Department of General Surgery, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University Zhengzhou, China
| | - Qi Ma
- Department of General Surgery, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University Zhengzhou, China
| | - Xianzhi Lu
- Department of General Surgery, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University Zhengzhou, China
| | - Xiaobing Chen
- Department of General Surgery, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University Zhengzhou, China
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Seo H, Kim E, Son JD, Ji S, Min SW, Park HP. A prospective randomised study of a rigid video-stylet vs. conventional lightwand intubation in cervical spine-immobilised patients. Anaesthesia 2016; 71:1341-1346. [DOI: 10.1111/anae.13606] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2016] [Indexed: 12/12/2022]
Affiliation(s)
- H. Seo
- Department of Anaesthesiology and Pain Medicine; Dankook University Hospital; Cheonan Korea
| | - E. Kim
- Department of Anaesthesiology and Pain Medicine; Daegu Catholic University Hospital; Daegu Korea
| | - J. D. Son
- Department of Anaesthesiology and Pain Medicine; Seoul National University Hospital; Seoul Korea
| | - S. Ji
- Department of Anaesthesiology and Pain Medicine; Seoul National University Hospital; Seoul Korea
| | - S. W. Min
- Department of Anaesthesiology and Pain medicine; SMG-SNU Boramae Medical Center; Seoul Korea
| | - H. P. Park
- Department of Anaesthesiology and Pain Medicine; Seoul National University Hospital; Seoul Korea
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Jang JY, Song IS, Baek KJ, Choi Y, Ji S. Immunologic characteristics of human gingival fibroblasts in response to oral bacteria. J Periodontal Res 2016; 52:447-457. [DOI: 10.1111/jre.12410] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2016] [Indexed: 01/12/2023]
Affiliation(s)
- J. Y. Jang
- Department of Periodontology; Institute of Oral Health Science; Ajou University School of Medicine; Suwon Korea
| | - I.-S. Song
- Department of Oral and Maxillofacial Surgery; Korea University Anam Hospital; Seoul Korea
| | - K. J. Baek
- Department of Oromaxillofacial Infection & Immunity; BK21 CLS; School of Dentistry and Dental Research Institute; Seoul National University; Seoul Korea
| | - Y. Choi
- Department of Oromaxillofacial Infection & Immunity; BK21 CLS; School of Dentistry and Dental Research Institute; Seoul National University; Seoul Korea
| | - S. Ji
- Department of Periodontology; Institute of Oral Health Science; Ajou University School of Medicine; Suwon Korea
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Zhang Z, Kong Y, Yang W, Ma F, Zhang Y, Ji S, Ma EM, Liu H, Chen Y, Hua Y. Upregulation of microRNA-34a enhances the DDP sensitivity of gastric cancer cells by modulating proliferation and apoptosis via targeting MET. Oncol Rep 2016; 36:2391-7. [PMID: 27513895 DOI: 10.3892/or.2016.5016] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 07/14/2016] [Indexed: 12/15/2022] Open
Abstract
Cisplatin (DDP) based chemotherapy is still the main strategy of human gastric cancer (GC) treatment. However, drug resistance is a major obstacle for DDP chemotherapy. Recent studies indicated that the resistance could be modulated by the regulation of dysregulated microRNAs (miRs). Previous study also found miR-34a was associated with cell proliferation and apoptosis in human GC; however, the relationship between miR-34a and DDP resistance still remains unexplored. The purpose of this study was to investigate whether miR-34a is associated with DDP resistance in human GC cells. Our study found that the expression of miR-34a was significantly decreased in DDP resistance human GC tissues and DDP resistance human GC SGC7901/DDP cells compared with normal GC tissues and cells. Upregulation of miR-34a enhanced the DDP sensitivity of SGC7901/DDP cells to DDP through the inhibition of cell proliferation and induction of cell apoptosis; on the other hand downregulation of miR-34a could weaken the DDP sensitivity of SGC7901 cells to DDP. Further study found that MET was a direct target of miR-34a and the regulation of MET could affect the DDP sensitivity of SGC7901/DDP cells. Moreover, our study also indicated that up-regulation of miR-34a could decrease the expression of MET in SGC7901/DDP cells. Therefore, our findings suggested miR-34a could modulate human gastric cancer cell DDP sensitivity by regulation of cell proliferation and apoptosis via targeting MET, potentially benefiting human GC treatment in the future.
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Affiliation(s)
- Zhandong Zhang
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Ye Kong
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Wei Yang
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Fei Ma
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Yonglei Zhang
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Sheqing Ji
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Er-Min Ma
- Surgical Oncology, The People Hospital of Zhengzhou, Zhengzhou, Henan 450000, P.R. China
| | - Hongxing Liu
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Yongshun Chen
- Department of Radiotherapy, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
| | - Yawei Hua
- Department of General Surgery, Affiliated Tumor Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 450008, P.R. China
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Ji S, Li A, Wu K, Deng C, Dong F, Li L, Zhou T, Yue W, Wang CY, Lu W. Brief Questionnaire Derived from PANSS Using a General Probability Model to Assess and Monitor the Clinical Features of Schizophrenia. Pharmacopsychiatry 2016; 49:117-23. [PMID: 26808834 DOI: 10.1055/s-0035-1569360] [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: 10/22/2022]
Abstract
AIM Patients with schizophrenia require continuous treatment much longer than the duration of their hospitalization, which makes their family members essential in their medical care. However, the evaluation of the disease state could only be done by professionals. This prompted us to seek potent indicators of disease states that are understandable and easy to use for the patients' family. METHOD Specific items were firstly extracted from the total PANSS scale. Then 3 096 PANSS scores were analyzed using a nonlinear mixed-effects model (NONMEM). A questionnaire was subsequently developed for family members to assess and monitor the overall severity of schizophrenia. Finally this questionnaire was validated in 33 patients. RESULTS 2 items (P1 and N4) were extracted from the 8 effective remission items according to the correlation coefficients between the total PANSS score and different combinations of items. P1N4 was defined as the sum of these 2 items. A model was then developed to describe the probability of PANSS≥60, with P1N4 as indicators. The results indicated that P1N4 could make a good predictor of the overall probability of PANSS≥60, which was independent of treatment. A brief questionnaire with 7 questions was developed based on the results. External validation results indicated the questionnaire's suitability for a good assessment. CONCLUSION Questionnaire developed based on P1 and N4 may facilitate the patients' family members to better understand the disease state and help to prevent relapse.
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Affiliation(s)
- S Ji
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - A Li
- Center of Schizophrenia, Beijing Institute for Brain Disorders, Laboratory of Brain Disorders (Capital Medical University), Beijing, China
| | - K Wu
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - C Deng
- Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - F Dong
- Center of Schizophrenia, Beijing Institute for Brain Disorders, Laboratory of Brain Disorders (Capital Medical University), Beijing, China
| | - L Li
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - T Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - W Yue
- Institute of Mental Health, The Sixth Hospital, Peking University, Beijing, China
| | - C-Y Wang
- Center of Schizophrenia, Beijing Institute for Brain Disorders, Laboratory of Brain Disorders (Capital Medical University), Beijing, China
| | - W Lu
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
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Zhang B, Xu J, Li C, Shi S, Ji S, Xu W, Liu J, Jin K, Liang D, Liang C, Liu L, Liu C, Qin Y, Yu X. MBD1 is an Epigenetic Regulator of KEAP1 in Pancreatic Cancer. Curr Mol Med 2016; 16:404-11. [DOI: 10.2174/1566524016666160316154150] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 03/11/2016] [Accepted: 03/04/2016] [Indexed: 11/22/2022]
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Ji S, Shao Q, Wang Y, Liu J. Efficacy comparison between minimally invasive and conventional surgery for lumbar disc herniation in Chinese Han population: a meta-analysis. Spinal Cord 2015; 55:626. [PMID: 26679374 DOI: 10.1038/sc.2015.240] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This corrects the article DOI: 10.1038/sc.2014.98.
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Thangaraj M, Doucette J, Ji S, Nazarali A. ISDN2014_0292: Role of SIRT2 in oligodendrocyte development and myelination. Int J Dev Neurosci 2015. [DOI: 10.1016/j.ijdevneu.2015.04.239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
| | - J.R. Doucette
- University of SaskatchewanSaskatoonSKCanada
- Cameco Multiple Sclerosis Neuroscience Research CenterCity HospitalSaskatoonSKCanada
| | - S. Ji
- University of SaskatchewanSaskatoonSKCanada
| | - A.J. Nazarali
- University of SaskatchewanSaskatoonSKCanada
- Cameco Multiple Sclerosis Neuroscience Research CenterCity HospitalSaskatoonSKCanada
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Sun Z, Wang Y, Ji S, Wang K, Zhao Y. Computer-aided analysis with Image J for quantitatively assessing psoriatic lesion area. Skin Res Technol 2015; 21:437-43. [PMID: 25661416 DOI: 10.1111/srt.12211] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/07/2014] [Indexed: 11/27/2022]
Abstract
BACKGROUND/AIMS Body surface area is important in determining the severity of psoriasis. However, objective, reliable, and practical method is still in need for this purpose. We performed a computer image analysis (CIA) of psoriatic area using the image J freeware to determine whether this method could be used for objective evaluation of psoriatic area. METHODS Fifteen psoriasis patients were randomized to be treated with adalimumab or placebo in a clinical trial. At each visit, the psoriasis area of each body site was estimated by two physicians (E-method), and standard photographs were taken. The psoriasis area in the pictures was assessed with CIA using semi-automatic threshold selection (T-method), or manual selection (M-method, gold standard). The results assessed by the three methods were analyzed with reliability and affecting factors evaluated. RESULTS Both T- and E-method correlated strongly with M-method, and T-method had a slightly stronger correlation with M-method. Both T- and E-methods had a good consistency between the evaluators. All the three methods were able to detect the change in the psoriatic area after treatment, while the E-method tends to overestimate. CONCLUSION The CIA with image J freeware is reliable and practicable in quantitatively assessing the lesional of psoriasis area.
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Affiliation(s)
- Z Sun
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
| | - Y Wang
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
| | - S Ji
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
| | - K Wang
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
| | - Y Zhao
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
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Ji S, Choi YS, Choi Y. Bacterial invasion and persistence: critical events in the pathogenesis of periodontitis? J Periodontal Res 2014; 50:570-85. [DOI: 10.1111/jre.12248] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2014] [Indexed: 12/22/2022]
Affiliation(s)
- S. Ji
- Department of Periodontology Anam Hospital Korea University Seoul Korea
| | - Y. S. Choi
- Department of Immunology and Molecular Microbiology and Dental Research Institute School of Dentistry Seoul National University Seoul Korea
| | - Y. Choi
- Department of Immunology and Molecular Microbiology and Dental Research Institute School of Dentistry Seoul National University Seoul Korea
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Kang Y, Jang H, Kim Y, Choi B, Kim J, Lee J, Shin H, Kim S, Kay C, Park S, Ji S, Koo J, Jeon S, Lee S. The Feasibility Study of MRI-Based Dose Calculation With Look-up Table in Radiation Treatment Planning. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ji S, Shao Q, Wang Y, Liu J. Efficacy comparison between minimally invasive and conventional surgery for lumbar disc herniation in Chinese Han population: a meta-analysis. Spinal Cord 2014; 52:734-9. [PMID: 24912547 DOI: 10.1038/sc.2014.98] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/29/2014] [Accepted: 05/11/2014] [Indexed: 11/09/2022]
Abstract
STUDY DESIGN The pooled data were analyzed using RevMan 5.2 software. OBJECTIVES The aim was to compare the efficacy of minimally invasive and conventional surgery for lumbar disc herniation (LDH) in Chinese Han population. SETTING China. METHODS An electronic search up to November 2013 was performed to retrieve all relevant articles. The overall standardized mean difference (SMD) for continuous outcomes and odds ratio (OR) for dichotomous variables as well as their 95% confidence intervals (CIs) were calculated to compare the efficacy of minimally invasive and conventional surgery. RESULTS A total of 23 studies involving 1913 patients treated by minimally invasive surgery and 2295 patients treated by conversational surgery were included in this meta-analysis. The overall estimate indicated that minimally invasive surgery could significantly decrease the hospitalization time (SMD = -2.03, 95% CI, -2.49 to 1.56, P < 0.0001), blood loss (SMD = -2.65, 95% CI -3.33 to 1.97, P < 0.0001), incision length (SMD = -3.57, 95% CI, -4.39 to 2.75, P < 0.0001), recurrence rate (odds ratio (OR) = 0.22, 95 CI: 0.08-0.60, P = 0.003) and complications (OR = 0.47, 95% CI: 0.25-0.92, P = 0.03) and increase the postoperative excellent rate (OR = 1.82, 95% CI, 1.44-2.31, P < 0.0001) compared with conventional surgery. In addition, the pooled data showed that there was no statistically significant difference in the operative time (SMD = -0.58, 95% CI, -1.32 to 0.15, P = 0.12) between LDH patients treated by minimally invasive and conventional surgery. CONCLUSION In conclusion, minimally invasive surgery was a more safe and effective treatment for treating LDH in Chinese Han population when compared with conventional surgery.
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Affiliation(s)
- S Ji
- Department of Emergency Trauma Surgery, East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Q Shao
- Department of Emergency Trauma Surgery, East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Y Wang
- Department of Emergency Trauma Surgery, East Hospital, Tongji University School of Medicine, Shanghai, China
| | - J Liu
- Department of Emergency Trauma Surgery, East Hospital, Tongji University School of Medicine, Shanghai, China
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Zhang H, Zhang X, Ji S, Hao C, Mu Y, Sun J, Hao J. Sohlh2 inhibits ovarian cancer cell proliferation by upregulation of p21 and downregulation of cyclin D1. Carcinogenesis 2014; 35:1863-71. [DOI: 10.1093/carcin/bgu113] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Meng F, Ma L, Ji S, Yang W, Cao B. Isolation and characterization of Bacillus subtilis strain BY-3, a thermophilic and efficient cellulase-producing bacterium on untreated plant biomass. Lett Appl Microbiol 2014; 59:306-12. [PMID: 24773580 DOI: 10.1111/lam.12276] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 03/24/2014] [Accepted: 04/15/2014] [Indexed: 11/28/2022]
Abstract
UNLABELLED Bioconversion of biomass, particularly crop wastes, into biofuels is being developed as an alternative approach in meeting the high energy demand. In this study, a thermophilic bacterial strain BY-3 that exhibits cellulolytic potential was isolated from faecal samples of Tibetan pigs; this strain was identified as Bacillus subtilis. The strain can produce cellulase when grown on various substrates, including carboxymethyl cellulose, rice straw, corn stover, soluble starch and wheat bran. The maximum cellulase activity of the strain was up to 4·323 ± 0·065 U ml(-1) when cultivated in the medium containing corn stover (30 g l(-1) ) for 24 h. The results demonstrated that corn stover is the most suitable substrate for cellulase production by the strain BY-3. The crude cellulase of strain BY-3 was most active at pH 5·5 and 60°C, and the enzyme in acetate buffer (50 mmol l(-1) ) demonstrated a good stability at 60°C for at least 1 h. The crude cellulase exhibited a strong antibacterial activity against Staphylococcus aureus. The strain can be used in cost-efficient cellulase production for bioconversion of agricultural residual biomass into biofuels. SIGNIFICANCE AND IMPACT OF THE STUDY The increased consumption of fossil fuels has caused serious energy crisis and environmental problem. Thus, an alternative energy source is necessary. Bioconversion of biomass, particularly agricultural residuals, into value-added bioproducts, such as biofuels and chemical solvents, has received considerable attention. In this study, the newly isolated thermophilic Bacillus subtilis strain BY-3 produces cellulase efficiently with the use of untreated corn stover as a sole carbon source. This strain possesses the thermostable cellulase that is active with diverse crop wastes with a broad pH range and is a highly promising candidate for agricultural waste management.
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Affiliation(s)
- F Meng
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
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Ji S, Chen Y, Ruan Z, Fu Y, Ji J, Fu Y, Wang H, Yu Y. Prevalence of carbapenem-hydrolyzing class D β-lactamase genes in Acinetobacter spp. isolates in China. Eur J Clin Microbiol Infect Dis 2013; 33:989-97. [PMID: 24374815 DOI: 10.1007/s10096-013-2037-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 12/12/2013] [Indexed: 10/25/2022]
Abstract
In order to assess the prevalence of carbapenem-hydrolyzing class D β-lactamase genes in Acinetobacter spp. isolates in China, we conducted a polymerase chain reaction (PCR)-based surveillance of OXA-type β-lactamase gene clusters for a total of 2,880 Acinetobacter spp. isolates collected from 23 Chinese provinces. All isolates were tested for susceptibility to 12 antimicrobial agents and showed high rates of resistance to all these agents except minocycline. We also found that the vast majority of carbapenem-resistant Acinetobacter spp. were OXA-23-like-producing isolates, predominantly Acinetobacter baumannii isolates. Besides, bla OXA-58-like and bla OXA-24-like genes were detected in 32 and 11 isolates, respectively, involving many provinces throughout China. Furthermore, these two carbapenem-resistance determinants were located on transferable plasmids in most cases, indicating an emerging threat for both OXA-58-like- and OXA-24-like-producing Acinetobacter spp. isolates in China. Interestingly, a novel homologue of the bla OXA-143 gene was identified in a susceptible Acinetobacter pittii isolate. Overall, these observations suggest that the bla OXA-23-harboring A. baumannii isolates are the most frequent carbapenem-resistant Acinetobacter spp. in China, and the bla OXA-24-like and bla OXA-58-like genes have emerged as potential threats of hospital outbreaks of multidrug-resistant Acinetobacter spp.
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Affiliation(s)
- S Ji
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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Ji S, Tian Y, Sun R, Lu Y, Zhang L, Chen L, Duan S. Radiation-Induced Hippocampal Neurogenesis Impairment and Cognitive Deficits Is Associated With Inhibition of BDNF-Trk-B Signaling. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ji J, Tian Y, Ji S, Zhang L, Zhu Y, Lu X. Ionizing Radiation Induces Cell Cycle G1 Arrest and Tumor Suppressor Gene P16, P21, P27 Expression in Keloid Fibroblasts. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Choi Y, Kim YC, Jo A, Ji S, Koo KT, Ko Y, Choi Y. Porphyromonas Gingivalisand Dextran Sulfate Sodium Induce Periodontitis Through the Disruption of Physical Barriers in Mice. EUR J INFLAMM 2013. [DOI: 10.1177/1721727x1301100212] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Y.S. Choi
- Departments of Immunology and Molecular Microbiology, Seoul National University, Seoul, Korea
| | - Y. C. Kim
- Departments of Immunology and Molecular Microbiology, Seoul National University, Seoul, Korea
| | - A.R. Jo
- Departments of Immunology and Molecular Microbiology, Seoul National University, Seoul, Korea
| | - S. Ji
- Department of Periodontology, Anam Hospital, Korea University, Seoul, Korea
| | - K-T. Koo
- Departments of Periodontology, BK21 CLS, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Y. Ko
- Department of Dentistry, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Y. Choi
- Departments of Immunology and Molecular Microbiology, Seoul National University, Seoul, Korea
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Xu J, Zhu W, Xu W, Yao W, Zhang B, Xu Y, Ji S, Liu C, Long J, Ni Q, Yu X. Up-Regulation of MBD1 Promotes Pancreatic Cancer Cell Epithelial-Mesenchymal Transition and Invasion by Epigenetic Down-Regulation of E-Cadherin. Curr Mol Med 2013. [DOI: 10.2174/156652413805076740] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Yao W, Cai X, Liu C, Qin Y, Cheng H, Ji S, Xu W, Wu C, Chen T, Xu J, Long J, Fang Z, Qu B, Hoth M, Ni Q, Zha X, Yu X. Profilin 1 potentiates apoptosis induced by staurosporine in cancer cells. Curr Mol Med 2013; 13:417-428. [PMID: 23331014] [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: 08/06/2012] [Revised: 10/12/2012] [Accepted: 10/15/2012] [Indexed: 06/01/2023]
Abstract
The correlation between the loss of Profilin 1 (Pfn1) with tumor progression indicated that Pfn1 is a tumor suppressor in human carcinoma. The molecular mechanisms underlying Pfn1 tumor suppression has yet to be elucidated. In this study, we showed that Pfn1 overexpression sensitizes cancer cells to apoptosis through the typical intrinsic apoptotic pathway. Mechanistically, the increased Pfn1 expression mediated the upregulation of p53R273H, one of the most common tumor-associated hotspot mutations of p53, with transactivation deletion in tumorigenesis and increased localization of p53R273H in cytoplasm. Further studies showed that mutant p53R273H was involved in apoptosis induced by Staurosporine (STS) via transcription-independent mitochondrial functions. We observed (i) the increased cytosolic localization of p53R273H, (ii) the activation of phosphorylation at Ser15, (iii) its mitochondrial localization; Pfn1 acted as a positive regulator of these processes. We also found that Pfn1 interacted with p53R273H and thus facilitated its exertion over the transcription-independent activity in the cytoplasm during drug action. Our results define a new function and mechanism of Pfn1 demonstrating that the combined effect with apoptotic agents led to a synergistic increase in apoptosis. In addition, p53R273H abrogating DNA binding was found to play a major role in the Pfn1- sensitized apoptosis through a transactivation-independent and cytosolic activity.
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Affiliation(s)
- W Yao
- Department of Pancreas and Hepatobiliary Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, P.R. China
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71
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Xu J, Zhu W, Xu W, Yao W, Zhang B, Xu Y, Ji S, Liu C, Long J, Ni Q, Yu X. Up-regulation of MBD1 promotes pancreatic cancer cell epithelial-mesenchymal transition and invasion by epigenetic down-regulation of E-cadherin. Curr Mol Med 2013; 13:387-400. [PMID: 23331011] [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: 08/06/2012] [Revised: 10/12/2012] [Accepted: 10/18/2012] [Indexed: 06/01/2023]
Abstract
Methyl-CpG binding domain protein 1 (MBD1) has been implicated in transcriptional regulation, heterochromatin formation, genomic stability, cell-cycle progression and development. It is also predicted that MBD1 might be involved in tumor development and progression. However, whether and how MBD1 is involved in tumorigenesis, especially in pancreatic cancer (PC), is currently unknown. We found that MBD1 was significantly up-regulated in PC tissues compared with the surrounding normal tissues according to RT-PCR data. Tissue microarray (TMA) based immunohistochemical study from 58 surgically resected PC specimens indicated that higher MBD1 expression correlated with lymph node metastasis and poor survival in PC patients. Gain- and loss-of-function studies in vitro validated MBD1 as a potent oncogene promoting PC cell invasion as well as epithelial-mesenchymal transition (EMT). Mechanistically, MBD1 is associated with Twist and NAD-dependent deacetylase sirtuin-1 (SIRT1), thereby forming the Twist-MBD1-SIRT1 complex on the CDH1 promoter, which resulted in reduced E-cadherin transcription activity and increased cell EMT ability. Significantly, targeting MBD1 reversed the EMT phenotype of PC and restored sensitivity to chemotherapy. Taken together, the results of our study revealed a novel function of MBD1 in PC invasion and metastasis by providing a molecular mechanism underlying MBD1-promoted EMT. Thus MBD1 may serve as a potential therapeutic target for PC.
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Affiliation(s)
- J Xu
- Department of Pancreas and Hepatobiliary Surgery, Fudan University Shanghai Cancer Center, Fudan University, 270 Dong An Road, Shanghai 200032, China
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72
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Yao W, Cai X, Liu C, Qin Y, Cheng H, Ji S, Xu W, Wu C, Chen T, Xu J, Long J, Fang Z, Qu B, Hoth M, Ni Q, Zha X, Yu X. Profilin 1 Potentiates Apoptosis Induced by Staurosporine in Cancer Cells. Curr Mol Med 2013. [DOI: 10.2174/156652413805076812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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73
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Yao W, Cai X, Liu C, Qin Y, Cheng H, Ji S, Xu W, Wu C, Chen T, Xu J, Long J, Fang Z, Qu B, Hoth M, Ni Q, Zha X, Yu X. Profilin 1 Potentiates Apoptosis Induced by Staurosporine in Cancer Cells. Curr Mol Med 2013. [DOI: 10.2174/1566524011313030011] [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: 11/22/2022]
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74
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Xu J, Zhu W, Xu W, Yao W, Zhang B, Xu Y, Ji S, Liu C, Long J, Ni Q, Yu X. Up-Regulation of MBD1 Promotes Pancreatic Cancer Cell Epithelial-Mesenchymal Transition and Invasion by Epigenetic Down-Regulation of E-Cadherin. Curr Mol Med 2013. [DOI: 10.2174/1566524011313030008] [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: 11/22/2022]
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75
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Bedford A, Li Z, Li M, Ji S, Liu W, Huai Y, de Lange CFM, Li J. Epidermal growth factor-expressing Lactococcus lactis enhances growth performance of early-weaned pigs fed diets devoid of blood plasma. J Anim Sci 2012; 90 Suppl 4:4-6. [DOI: 10.2527/jas.53973] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- A. Bedford
- Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1
| | - Z. Li
- Premix INVE Nutrition, Shenzhen, Guangdong, China, 518103
| | - M. Li
- Premix INVE Nutrition, Shenzhen, Guangdong, China, 518103
| | - S. Ji
- Premix INVE Nutrition, Shenzhen, Guangdong, China, 518103
| | - W. Liu
- College of Life Science, Foshan University, Foshan, Guangdong, China, 528000
| | - Y. Huai
- College of Life Science, Foshan University, Foshan, Guangdong, China, 528000
| | - C. F. M. de Lange
- Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1
| | - J. Li
- Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1
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76
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Ji S, Yarmohammadi H, Hoyt H, Hansford R, Zviman M, Steinberg S, Judge D, Caffo B, Tomaselli G, Halperin H, Cheng A, Spragg D, Henrikson C, Sinha S, Marine J, Berger R, Calkins H, Nazarian S. Association of Atrial Myocardial Fibrosis with a Common Matrix Metalloproteinase-2 Promoter Polymorphism. Heart Rhythm 2012. [DOI: 10.1016/j.hrthm.2012.09.123] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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77
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Ji S, Sun R, Zhang L, Tian Y. Whole Brain Irradiation-induced Decrease of Histone H3 Acetylation in Hippocampus of Rats. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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78
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Cheng Z, Ji S, Stephens N, Fitzgerald R, Cenkowski S. P46 The impact of hydrogen sulfide on ovalbumin-sensitized canine trachealis smooth muscle. Nitric Oxide 2012. [DOI: 10.1016/j.niox.2012.08.047] [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: 11/29/2022]
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79
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Cho SY, Park HD, Lee YW, Ki CS, Lee SY, Sohn YB, Park SW, Kim SH, Ji S, Kim SJ, Choi EW, Kim CH, Ko AR, Paik KH, Lee DH, Jin DK. Mutational spectrum in eight Korean patients with 3-methylcrotonyl-CoA carboxylase deficiency. Clin Genet 2011; 81:96-8. [DOI: 10.1111/j.1399-0004.2011.01704.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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80
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Wang C, Ji S, Wu Q, Wu C, Wang Z. Determination of Triazine Herbicides in Environmental Samples by Dispersive Liquid-Liquid Microextraction Coupled with High Performance Liquid Chromatography. J Chromatogr Sci 2011; 49:689-94. [DOI: 10.1093/chrsci/49.9.689] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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81
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Ji S, Ates C, Lesanovsky I. Two-dimensional Rydberg gases and the quantum hard-squares model. Phys Rev Lett 2011; 107:060406. [PMID: 21902304 DOI: 10.1103/physrevlett.107.060406] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 06/27/2011] [Indexed: 05/31/2023]
Abstract
We study a two-dimensional lattice gas of atoms that are photoexcited to Rydberg states in which they interact via the van der Waals interaction. We explore the regime of dominant nearest-neighbor interaction where this system is intimately connected with a quantum version of Baxter's hard-squares model. We show that the strongly correlated ground state of the Rydberg gas can be analytically described by a projected entangled pair state that constitutes the ground state of the quantum hard-squares model. This correspondence allows us to identify a phase boundary where the Rydberg gas undergoes a transition from a disordered (liquid) phase to an ordered (solid) phase.
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Affiliation(s)
- S Ji
- Midlands Ultracold Atom Research Centre, School of Physics and Astronomy, The University of Nottingham, United Kingdom
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82
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Ji S, Doucette JR, Nazarali AJ. Sirt2 is a novel in vivo downstream target of Nkx2.2 and enhances oligodendroglial cell differentiation. J Mol Cell Biol 2011; 3:351-9. [DOI: 10.1093/jmcb/mjr009] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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83
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Wilson B, Valdes P, Leblond F, Kim A, Harris B, Fan X, Torteston T, Hartov A, Ji S, Paulsen K, Roberts D. Quantitative measurements of ALA-induced PpIX during brain tumor resection. Photodiagnosis Photodyn Ther 2011. [DOI: 10.1016/j.pdpdt.2011.03.130] [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: 11/29/2022]
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84
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Si W, Lu Y, He X, Ji S, Niu Y, Tan T, Ji W. 116 IMPROVED SURVIVAL BY CRYOPRESERVING RHESUS MACAQUE (MACACA MULATTA) SPERMATOZOA WITH DIRECTIONAL FREEZING TECHNIQUE. Reprod Fertil Dev 2010. [DOI: 10.1071/rdv22n1ab116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A significant increase in nonhuman primate models of human diseases will be expected in the near future since the successes in production of genetically engineered rhesus monkey models of human diseases. Sperm banking can provide an effective way to preserve valuable genetic resources. Our objective was to (1) develop a protocol using directional freezing technique (DFT) for rhesus monkey spermatozoa cryopreservation, which allows precise control of the velocity and the morphology of the ice-front propagation by transferring the tubes loaded with 2 mL sperm samples at a controllable velocity through two separate chambers with controllable temperature settings, and (2) achieve survival rate that was higher than that achieved with conventional freezing technique (CFT), by which sperm samples were cryopreserved in 0.25 mL straws with liquid nitrogen vapor in a styrofoam box. Sperm motility, acrosomal integrity, and in vitro fertilization (IVF) assay were used to assess the function of frozen-thawed spermatozoa. Data were analyzed by ANOVA and Fisher protected LSD test. Experiment 1 was aimed at optimizing the cooling rate using DFT. Tubes were frozen using the multi-thermal gradient freezing device (MTG 516, Harmony CryoCareTM, IMT Ltd.) at fast (16°C/min), medium (12°C/min), and slow (7°C/min) cooling rates, which corresponded to the transferring velocities (2.5, 1.5, and 0.5 mm s-1, respectively). The results showed that spermatozoa frozen at fast and medium cooling rates showed significantly higher frozen-thawed motility than those frozen at slow cooling rate (61% and 59% v. 50%, P < 0.05). However, no difference was observed on sperm acrosomal integrity among the experimental groups (84, 80, and 78%, respectively, P > 0.05). The purposes of Experiment 2 were determined to examine if using DFT at the optimized cooling rate (12°C/min) can improve the cryo-survival of rhesus monkey spermatozoa compared with CFT. Our results showed that spermatozoa cryopreserved by using DFT achieved significantly higher frozen-thawed sperm motility that those cryopreserved by using CFT (64 v. 54%, P < 0.05). However, no difference was observed on acrosomal integrity between spermatozoa cryopreserved by DFT and CFT (84 and 83%, respectively; P > 0.05). The function of spermatozoa cryopreserved by using DFT was further evaluated by IVF. Females were treated with rhFSH twice-daily for 8 days after the onset of menses and following a treatment of hCG injection on Day 9. Cumulus-oocyte complexes were collected by laparoscopic follicular aspiration 32 h later. Of the inseminated oocytes, 79% were fertilized and 90 and 53% of the resulting zygotes developed into 2-cell and blastocysts, respectively. The fertilization rate was lower and the blastocyst rate was slightly higher than our previous report when fresh spermatozoa were used for IVF (94 and 52%, respectively). Our results indicate that spermatozoa of rhesus monkeys can be effectively cryopreserved using DFT in large volume. This finding provided a new and effective way for genetics preservation purposes in this important species.
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85
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Ji S, Lee SH, Broholm C, Koo TY, Ratcliff W, Cheong SW, Zschack P. Spin-lattice order in frustrated ZnCr2O4. Phys Rev Lett 2009; 103:037201. [PMID: 19659312 DOI: 10.1103/physrevlett.103.037201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Indexed: 05/28/2023]
Abstract
Using synchrotron x-ray and neutron diffraction, we disentangle spin-lattice order in highly frustrated ZnCr2O4 where magnetic chromium ions occupy the vertices of regular tetrahedra. Upon cooling below 12.5 K the quandary of antialigning spins surrounding the triangular faces of tetrahedra is resolved by establishing weak interactions on each triangle through an intricate lattice distortion. However, the resulting spin order is not simply a Néel state on strong bonds, but rather a complex coplanar spin structure, indicating that antisymmetric and/or further neighbor exchange interactions also play a role as ZnCr2O4 resolves conflicting magnetic interactions.
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Affiliation(s)
- S Ji
- Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714, USA
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86
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Kofu M, Kim JH, Ji S, Lee SH, Ueda H, Qiu Y, Kang HJ, Green MA, Ueda Y. Weakly coupled s=1/2 quantum spin singlets in Ba3Cr2O8. Phys Rev Lett 2009; 102:037206. [PMID: 19257389 DOI: 10.1103/physrevlett.102.037206] [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] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Revised: 11/24/2008] [Indexed: 05/27/2023]
Abstract
Using single crystal inelastic neutron scattering with and without the application of an external magnetic field and powder neutron diffraction, we have characterized magnetic interactions in Ba3Cr2O8. Even without a field, we found that there exist three singlet-to-triplet excitation modes in the (h, h, l) scattering plane. Our complete analysis shows that the three modes are due to spatially anisotropic interdimer interactions that are induced by lattice distortions of the tetrahedron of oxygens surrounding the Jahn-Teller active Cr5+(3d1). The strong intradimer coupling of J0=2.38(2) meV and weak interdimer interactions (|Jinter|< or =0.52(2) meV) makes Ba3Cr2O8 a good model system for weakly coupled s=1/2 quantum spin dimers.
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Affiliation(s)
- M Kofu
- Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714, USA
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87
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Wen J, Li L, Chen J, Ji S, Zheng C, Liu Z. Tripterygium wilfordii hook f increase the blood concentration of tacrolimus. Transplant Proc 2008; 40:3679-82. [PMID: 19100464 DOI: 10.1016/j.transproceed.2008.08.132] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2007] [Accepted: 08/12/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To observe the influence of the Tripterygium wilfordii Hook F (T II) on the blood concentration of tacrolimus and analyze the impact of this effect. METHOD Twenty-two renal transplant receipts taking tacrolimus combined with the T II were selected for this study. We analyzed the blood concentrations and the rate of concentration compared with dosage (C/D rate) pre- and postcombination over 6 months. All cases underwent the CYP3A5 genotype test. RESULT The concentrations of tacrolimus were raised to a certain degree after the combination in all the cases. The first-time elevation differed from 1 week to 4 months. The C/D rate increased by 1.7 to 7.2 times with most evaluated C/D rates ranging from 1.8 to 3.8. The elevated C/D rate of the subgroup of CYP3A5 1/1 and 1/3 (n = 10) contrasted with the 3/3 genotype subgroup (n = 12: 2.99 +/- 1.71 vs 2.55 +/- 1.07; P = .472). The mycophenolate mofetil subgroup (n = 17) was not contrasted to the mizoribine subgroup (n = 5: 2.85 +/- 1.51 vs 2.31 +/- 0.26; P = .498). CONCLUSION T II considerably increased the blood concentration and the C/D rate of tacrolimus. The degree of increase was probably not related to the CYP3A5 genotype and the combination of immunosuppressive agents.
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Affiliation(s)
- J Wen
- Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu, China
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88
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Kim JH, Ji S, Lee SH, Lake B, Yildirim T, Nojiri H, Kikuchi H, Habicht K, Qiu Y, Kiefer K. External magnetic field effects on a distorted kagome antiferromagnet. Phys Rev Lett 2008; 101:107201. [PMID: 18851251 DOI: 10.1103/physrevlett.101.107201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2008] [Revised: 07/10/2008] [Indexed: 05/26/2023]
Abstract
We report bulk magnetization, and elastic and inelastic neutron scattering measurements under an external magnetic field H on the weakly coupled distorted kagome system, Cu2(OD)3Cl. Our results show that the ordered state below 6.7 K is a canted antiferromagnet and consists of large antiferromagnetic ac components and smaller ferromagnetic b components. By first-principles calculations and linear spin wave analysis, we present a simple spin Hamiltonian with nonuniform nearest neighbor exchange interactions resulting in a system of coupled spin trimers with a single-ion anisotropy that can qualitatively reproduce the spin dynamics of Cu2(OD)3Cl.
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Affiliation(s)
- J-H Kim
- Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
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89
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Chen J, Li L, Wen J, Tang Z, Ji S, Sha G, Cheng Z, Sun Q, Cheng D, Liu Z. Observation of efficacy and safety of converting the calcineurin inhibitor to sirolimus in renal transplant recipients with chronic allograft nephropathy. Transplant Proc 2008; 40:1411-5. [PMID: 18589119 DOI: 10.1016/j.transproceed.2008.03.096] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Accepted: 03/06/2008] [Indexed: 12/19/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate the efficacy and safety of converting from a calcineurin inhibitor (CNI) to sirolimus among renal transplant recipients with chronic allograft nephropathy (CAN). METHODS In 16 patients with CAN, substituted sirolimus for CsA or FK506 and observed the incidence of acute rejection and changes in serum creatinine, triglycerides, cholesterol, blood uric acid, and peripheral blood leukocyte/platelet counts within 12 months. All recipients underwent an allograft biopsy before conversion. The targeted sirolimus level was 4-8 ug/L. RESULTS After conversion to sirolimus, the creatinine level of 7 cases decreased and the efficacy rate was (43.8%). No acute rejection occurred during the follow-up. The cases with hypercholesteremia increased from 3 to 7 after conversion; hypertriglyceridemia increased from 3 to 5; leukopenia occurred in 2; subnormal platelet counts increased from 2 to 3; and hyperuricemia increased from 6 to 7. Meanwhile, the average level of peripheral blood leukocytes obviously decreased in the first month, the average peripheral blood cholesterol increased over 12 months, but the average content of peripheral blood platelets, triglyceride and blood uric acid failed to display as statistic difference. Eight patients showed C4d deposition in peritubular capillary in graft tissue before conversion, 7 cases of whom showed no improvement in renal function. In 6 cases there was no C4d deposition in peritubular capillary in graft tissue. Only 2 of 6 cases showed no improvement in renal function. There were 6 patients whose creatinine level was <2.48 mg/dL before conversion, and renal function in 5 of them improved in a year after conversion. In contrast, among 10 patients whose blood creatinine level was >2.48 mg/dL, only 2 cases improved. CONCLUSION It is safe for patients with CAN to use substitute sirolimus for CNI; the incidence of acute rejection did not increase. In this study, 43.8% of patients showed improved renal function. The main adverse reactions after conversion to sirolimus were hypercholesteremia and decreased peripheral blood leukocytes. The serum creatinine level and the deposition of C4d in peritubular capillary were important factors influencing therapeutic efficacy.
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Affiliation(s)
- J Chen
- Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
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90
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Abstract
AIM The induction of tissue-destructive molecules from neutrophils by periodontopathic bacteria has been suggested as one of the mechanisms of periodontal destruction. The aim of this study was to determine whether the ability to stimulate neutrophils is an authentic characteristic of periodontopathic bacteria. METHODS We evaluated, along with phagocytosis, the production of reactive oxygen species (ROS), matrix metalloproteinase-8 (MMP-8), and interleukin-1beta by neutrophils in response to non-periodontopathic Streptococcus sanguinis and periodontopathic bacteria Fusobacterium nucleatum and Treponema denticola, in the absence or presence of antibodies. Phagocytosis, the death of neutrophils, and intracellular ROS production were measured by flow cytometry and the concentrations of MMP-8 and interleukin-1beta secreted into medium were determined by enzyme-linked immunosorbent assay. RESULTS S. sanguinis and F. nucleatum induced greater production of ROS, MMP-8, and interleukin-1beta than did T. denticola. The levels of tissue-destructive molecules produced by neutrophils had a positive correlation with phagocytosis. Opsonization of bacteria with antibodies significantly increased phagocytosis and ROS production and release, thus increasing both bacterial clearance and potential tissue damage. CONCLUSION The ability of oral bacteria to induce tissue-destructive molecules from neutrophils is not an inherent characteristic of periodontopathic bacteria, which would provide a new insight into the role of neutrophils in periodontal destruction.
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Affiliation(s)
- J Shin
- Programs of Oromaxillofacial Infection & Immunity and BK21 CLS, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
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91
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Cheng C, Yeung SCJ, Zhong FT, Xiong Y, Luo HH, Ji S, Pan J. Aneurysmal bone cyst in the first rib. Ann Thorac Surg 2008; 85:2118-20. [PMID: 18498837 DOI: 10.1016/j.athoracsur.2007.12.045] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Revised: 12/12/2007] [Accepted: 12/14/2007] [Indexed: 10/22/2022]
Abstract
Aneurysmal bone cyst is a benign tumor of the skeletal system that rarely occurs in ribs. We report two cases of aneurysmal bone cyst in the first rib. The first patient was a 21-year-old woman with an aneurysmal bone cyst in the left first rib that was resected with an L incision. The second patient was a 42-year-old man with an aneurysmal bone cyst in the right first rib that was resected with a posterolateral incision but recurred 1 year later. An en bloc resection was performed, without recurrence to date. We also review this disease with emphasis on the etiology, clinicopathology, and treatment approaches.
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Affiliation(s)
- Chao Cheng
- Department of Thoracic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Peoples Republic of China
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92
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Ji S, Kim Y, Min BM, Han SH, Choi Y. Innate immune responses of gingival epithelial cells to nonperiodontopathic and periodontopathic bacteria. J Periodontal Res 2008; 42:503-10. [PMID: 17956462 DOI: 10.1111/j.1600-0765.2007.00974.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND OBJECTIVE We have previously reported different susceptibilities of periodontopathic and nonperiodontopathic bacteria to antimicrobial peptides and phagocytosis by neutrophils. Differences between the two groups of bacteria may exist also in their ability to induce immune responses from the host. Therefore, we evaluated the effects of various oral bacteria on innate immune responses by gingival epithelial cells. MATERIAL AND METHODS HOK-16B cells were cocultured with live or lysed nonperiodontopathic (n = 3) and periodontopathic (n = 5) bacterial species. The levels of human beta defensin-1, -2 and -3, and of the cathelicidin, LL-37, were examined by real-time reverse transcription-polymerase chain reaction, and the accumulated interleukin-8 and interleukin-1 alpha were measured by enzyme-linked immunosorbent assay. RESULTS Nonperiodontopathic bacteria up-regulated some antimicrobial peptides without affecting the levels of cytokines. In the periodontopathic group, the orange-complex bacteria induced antimicrobial peptides and interleukin-8 efficiently, but the red-complex bacteria often demonstrated suppressive effects. In contrast to live bacteria, bacterial lysates had no suppressive effects. In addition, some bacterial lysates demonstrated a reduced ability to induce antimicrobial peptides compared with live bacteria. CONCLUSION The nonperiodontopathic, the orange-complex, and the red-complex bacteria had different effects on the innate immune responses from gingival epithelial cells, which may affect the outcome of their host-microbial interaction in gingival sulcus.
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Affiliation(s)
- S Ji
- Department of Oromaxillofacial Infection & Immunity, School of Dentistry and Dental Research Institute, Seoul National University, Jongno-gu, Seoul, Korea
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Koo J, Song C, Ji S, Lee JS, Park J, Jang TH, Yang CH, Park JH, Jeong YH, Lee KB, Koo TY, Park YJ, Kim JY, Wermeille D, Goldman AI, Srajer G, Park S, Cheong SW. Non-resonant and resonant x-ray scattering studies on multiferroic TbMn2O5. Phys Rev Lett 2007; 99:197601. [PMID: 18233114 DOI: 10.1103/physrevlett.99.197601] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2007] [Indexed: 05/25/2023]
Abstract
Comprehensive x-ray scattering studies, including resonant scattering at Mn L, Tb L, and M edges, were performed on single crystals of TbMn2O5 for crystallographic data to elucidate the nature of its commensurate and incommensurate phases. The scattering results provide direct evidence of symmetry lowering to the ferroelectric phase driven by magnetically induced lattice modulations and show the presence of multiple magnetic orders. The competing orders under spin-frustrated geometry are believed to cause discommensuration and result in the commensurate-to-incommensurate phase transition around 24 K. It is proposed that the low temperature incommensurate phase consists of commensurate domains separated by antiphase domain walls which change both signs of spontaneous polarizations and x-ray scattering amplitudes for forbidden reflections.
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Affiliation(s)
- J Koo
- eSSC and Department of Physics, POSTECH, Pohang, Korea
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95
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Abstract
BACKGROUND AND OBJECTIVE The aim of this study was to compare the susceptibility of nonperiodontopathic and periodontopathic bacteria to major defense mechanisms for bacterial clearance in gingival sulcus. MATERIAL AND METHODS Twenty strains of 13 oral bacterial species were studied for their susceptibility to phagocytosis by human neutrophils and to the antimicrobial peptides LL-37 and human beta defensin-3. The minimum inhibitory concentrations of LL-37 and human beta defensin-3 were determined by a liquid dilution assay, and susceptibility to phagocytosis was examined by a flow cytometric phagocytosis assay. RESULTS The minimum inhibitory concentrations of LL-37 and human beta defensin-3 varied greatly, depending on the strain and species. Although a significant difference between the non- and periodontopathic groups was not observed, the red-complex bacteria were more resistant to LL-37 than the others (p=0.004). The susceptibility of oral bacteria to phagocytosis was quite variable, depending on the species but not on the strains. The periodontopathic bacteria, especially Actinobacillus actinomycetemcomitans and the red-complex triad, were more resistant to phagocytosis than were the nonperiodontopathic bacteria (p=0.0003). In addition, bacteria resistant both to antimicrobial peptides and to phagocytosis were more common in the periodontopathic group. CONCLUSION Our results indicate that immune evasion may contribute to the pathogenicity of some periodontopathic bacteria.
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Affiliation(s)
- S Ji
- Program of Oromaxillofacial Infection & Immunity and BK21, School of Dentistry, Seoul National University, Seoul, Korea
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96
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Ji S, Song C, Koo J, Park J, Park YJ, Lee KB, Lee S, Park JG, Kim JY, Cho BK, Hong KP, Lee CH, Iga F. Resonant X-ray scattering study of quadrupole-strain coupling in DyB4. Phys Rev Lett 2007; 99:076401. [PMID: 17930908 DOI: 10.1103/physrevlett.99.076401] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2007] [Indexed: 05/25/2023]
Abstract
X-ray and neutron scattering studies were performed on DyB4 which exhibits both a quadrupolar ordering and a macroscopic lattice distortion. A forbidden reflection at 7.792 keV near the Dy L3 absorption edge is identified as a quadrupolar ordering peak, and the quadrupolar order and a monoclinic structural distortion develop concomitantly below 12.3 K as second-order-type phase transitions. Coupling between the quadrupolar order and the strain in DyB4 is directly demonstrated by observing that both order parameters are proportional to each other.
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Affiliation(s)
- S Ji
- eSSC and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, South Korea
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97
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Ji S, Corredig M, Goff H. WITHDRAWN: Production and functional properties of micellar casein/k-carrageenan aggregates. Int Dairy J 2007. [DOI: 10.1016/j.idairyj.2007.07.003] [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: 11/15/2022]
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98
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Sun Q, Liu ZH, Cheng Z, Chen J, Ji S, Zeng C, Li LS. Treatment of early mixed cellular and humoral renal allograft rejection with tacrolimus and mycophenolate mofetil. Kidney Int 2006; 71:24-30. [PMID: 16969384 DOI: 10.1038/sj.ki.5001870] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [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: 11/09/2022]
Abstract
This prospective study investigated the efficiency of the tacrolimus (Tac) combined with mycophenolate mofetil (MMF) alone without immunoadsorption (IA) or plasmapheresis (PPH) as treatment for early (within 2 weeks) acute humoral rejection (AHR) in non-sensitized renal allograft recipients. Of 160 patients enrolled in this prospective study, 11 patients had histologically and clinically confirmed early steroid-resistant acute rejection with an antibody response and received Tac-MMF therapy. No other aggressive rescue methods such as IA, PPH were used, according to the study design. Patients (n=11) were followed for 13.8+/-3.5 months; nine were females. The complement-dependent cytotoxicity crossmatch was negative before transplantation in all patients and only positive for panel-reactive antibody in one patient. Most of the rejection episodes were mixed with cellular rejection (four patients met Banff IIA criteria, five patients met Banff IIB, one patient met Banff IB, and one patient met Banff borderline). After 16.19+/-6.16 days of treatment, all rejection episodes were successfully reversed and all graft functions were stable, with a mean serum creatinine level of 1.12+/-0.32 mg/dl during follow-up. No patient suffered from severe infectious complications (except one case of urinary infection). Our investigation suggests that Tac combined with MMF alone is adequate to reverse early mixed cellular and humoral C4d-positive rejection in non-sensitized renal allograft recipients.
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Affiliation(s)
- Q Sun
- Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
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99
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Sun Q, Liu ZH, Ji S, Chen J, Tang Z, Zeng C, Zheng C, Li LS. Late and early C4d-positive acute rejection: Different clinico-histopathological subentities in renal transplantation. Kidney Int 2006; 70:377-83. [PMID: 16760909 DOI: 10.1038/sj.ki.5001552] [Citation(s) in RCA: 42] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This study was performed to investigate the clinical and pathologic features of C4d-positive steroid-resistant acute rejection (AR) at different phases after renal transplantation. Fifty-six kidney allograft recipients with C4d-positive AR were divided into three groups, very early rejection (VER, occurring < or =14 days following transplantation, n=28), early rejection (ER, occurring 15-180 days following transplantation, n=5), and late rejection (LR, occurring >180 days following transplantation, n=23). Clinical and pathological features were evaluated. Significantly more patients in the ER and LR groups were associated with a reduction or withdrawal of immunosuppressants. More patients in the ER and LR groups experienced a significant (>3 g/l) decrease in serum albumin (80% ER, 91.3% LR, 7.1% VER, P<0.001) and a decrease in hemoglobin (>1 g/dl) (80, 100 vs 17.9%, P<0.001). Most VER patients reported a fever and had very rapid graft dysfunction requiring dialysis. Significantly more patients (87%) had interstitial fibrosis and tubular atrophy in the LR group compared with the other groups and 13% had transplant glomerulopathy. Most cases of VER were reversed with tacrolimus and mycophenolate mofetil treatment, with or without immunoadsorption, with a 1-year survival rate of 96.4%, compared with only 60 and 52.2% in the ER and LR groups. In conclusion, C4d-positive steroid-resistant AR at different time points is associated with unique clinico-histopathological manifestations requiring distinct treatment strategies. Late episodes are usually associated with significantly reduced serum albumin and hemoglobin levels and a poorer outcome. A more specialized treatment protocol should be established for these patients.
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Affiliation(s)
- Q Sun
- Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
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Beg MA, Gastal EL, Gastal MO, Ji S, Wiltbank MC, Ginther OJ. Changes in steady-state concentrations of messenger ribonucleic acids in luteal tissue during prostaglandin F2α induced luteolysis in mares. Anim Reprod Sci 2005; 90:273-85. [PMID: 16298275 DOI: 10.1016/j.anireprosci.2005.02.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Revised: 02/16/2005] [Accepted: 02/28/2005] [Indexed: 11/16/2022]
Abstract
Transvaginal ultrasound-guided luteal biopsy was used to evaluate the effects of prostaglandin (PG)F2alpha on steady-state concentrations of mRNA for specific genes that may be involved in regression of the corpus luteum (CL). Eight days after ovulation (Hour 0), mares (n=8/group) were randomized into three groups: control (no treatment or biopsy), saline+biopsy (saline treatment at Hour 0 and luteal biopsy at Hour 12), or PGF2alpha+biopsy (5mg PGF2alpha at Hour 0 and luteal biopsy at Hour 12). The effects of biopsy on CL were compared between the controls (no biopsy) and saline+biopsy group. At Hour 24 (12h after biopsy) there was a decrease in circulating progesterone in saline group to 56% of pre-biopsy values, indicating an effect of biopsy on luteal function. Mean plasma progesterone concentrations were lower (P<0.001) at Hour 12 in the PG group compared to the other two groups. The relative concentrations of mRNA for different genes in luteal tissue at Hour 12 was quantified by real time PCR. Compared to saline-treated mares, treatment with PGF2alpha increased mRNA for cyclooxygenase-2 (Cox-2, 310%, P<0.006), but decreased mRNA for LH receptor to 44% (P<0.05), steroidogenic acute regulatory protein to 22% (P<0.001), and aromatase to 43% (P<0.1) of controls. There was no difference in mRNA levels for PGF2alpha receptor between PG and saline-treated groups. Results indicated that luteal biopsy alters subsequent luteal function. However, the biopsy approach was effective for collecting CL tissue for demonstrating dynamic changes in steady-state levels of mRNAs during PGF2alpha-induced luteolysis. Increased Cox-2 mRNA concentrations suggested that exogenous PGF2alpha induced the synthesis of intraluteal PGF2alpha. Thus, the findings are consistent with the concept that an intraluteal autocrine loop augments the luteolytic effect of uterine PGF2alpha in mares.
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Affiliation(s)
- M A Beg
- Department of Animal Health and Biomedical Sciences, 1656 Linden Drive, University of Wisconsin-Madison, WI 53706, USA
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