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Bao L, Wang YT, Liu P, Lu MQ, Zhuang JL, Zhang M, Xia ZJ, Li ZL, Yang Y, Yan ZY, Jing HM, Dong F, Chen WM, Wu Y, Zhou HB, Fu R, Gong YP, Huang WR, Zhang YQ. Ixazomib-based frontline therapy followed by ixazomib maintenance in frail elderly newly diagnosed with multiple myeloma: a prospective multicenter study. EClinicalMedicine 2024; 68:102431. [PMID: 38318126 PMCID: PMC10839574 DOI: 10.1016/j.eclinm.2024.102431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/23/2023] [Accepted: 01/09/2024] [Indexed: 02/07/2024] Open
Abstract
Background Frail elderly patients with newly diagnosed multiple myeloma (NDMM) have inferior survival and less benefit from high-dose therapies. This prospective study aimed to investigate the efficacy, safety, and quality of life (QoL) of induction treatment of ixazomib/lenalidomide/dexamethasone (IRd) and ixazomib/pegylated liposomal doxorubicin/dexamethasone (IDd) followed by ixazomib/dexamethasone (Id) maintenance therapy in frail, elderly patients with NDMM. Methods From July 2019 to December 2021, this non-randomized concurrent controlled clinical study enrolled 120 NDMM patients aged ≥65 years with frailty defined by the International Myeloma Working Group (IMWG) frailty score or Mayo geriatric scoring system. The enrolled patients received 6-8 cycles of IRd or IDd followed by Id maintenance therapy for a minimum of 2 years at the discretion of physicians based on patient's clinical characteristics (chiCTR1900024917). Findings The median age was 71 years and 55% of the patients were males. The overall response rate (ORR) was 82% and 77%, complete response (CR) rate was 25% and 12% for IRd and IDd groups, respectively. The difference in ORR of the Idd group minus the IRd group was -5.36% (95% CI: -18.9% to 8.19%), indicating that the ORR of the IDd group was neither inferior nor non-inferior to the IRd group. After a median follow-up of 34.3 months, the median progression-free survival (PFS) was 21.6 and 13.9 months, OS was not reached and 29.2 months in IRd and IDd groups, respectively. 28 and 33 patients discontinued induction therapy, 20 and 19 discontinued maintenance therapy in IRd and IDd groups, respectively. Cumulative Grade 3 or higher hematological adverse events (AEs) occurred in 10 of the 60 patients (17%) and non-hematological AEs occurred in 15 of the 60 patients (25%) in the IRd group, while 13 of the 60 patients (22%) and 21 of the 60 patients (35%) in the IDd group. Patients were observed with clinically significant improvement in QoL when compared with that at baseline in both IRd and IDd groups by evaluation per cycle (P < 0.0001). Interpretation The results demonstrated that compared with IRd regimen, IDd regimen showed no significant advantage, but the survival of the IDd group was shorter than that of the IRd group, indicating an all-oral outpatient triplet regimen with IRd, which has low toxicity and has improved QoL, could be the viable first-line treatment option for frail NDMM patients. Funding The Young Elite Scientist sponsorship program by bast of Beijing Association for Science and Technology (No. BYESS2023116) and Beijing Medical Award Foundation (No. YXJL-2018-0539-0073).
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Affiliation(s)
- Li Bao
- Department of Hematology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Yu-Tong Wang
- Department of Hematology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Peng Liu
- Department of Hematology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Min-Qiu Lu
- Department of Hematology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, 100035, China
| | - Jun-Ling Zhuang
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Mei Zhang
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shanxi, China
| | - Zhong-Jun Xia
- Department of Hematologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhen-Ling Li
- Department of Hematology, China-Japan Friendship Hospital, Beijing, China
| | - Ying Yang
- Department of Hematology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Zhen-Yu Yan
- Department of Hematology, Affiliated Hospital of North China University of Science and Technology, Tangshan, China
| | - Hong-Mei Jing
- Department of Hematology, Third Hospital of Peking University, Beijing, China
| | - Fei Dong
- Department of Hematology, Third Hospital of Peking University, Beijing, China
| | - Wen-Ming Chen
- Department of Hematology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, China
| | - Yin Wu
- Department of Hematology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, China
| | - He-Bing Zhou
- Department of Hematology, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Rong Fu
- Department of Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yu-Ping Gong
- Department of Hematology, West China Hospital, Sichuan University, Chengdu, China
| | - Wen-Rong Huang
- Department of Hematology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - Yong-Qing Zhang
- Department of Hematology, The Eighth Medical Center of Chinese PLA General Hospital, Beijing, China
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Lu YH, Lu QY, Yan ZY, Xu CR. [Research and exploration of salivary biological markers for hepatitis B-related hepatocellular carcinoma]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:495-503. [PMID: 37365026 DOI: 10.3760/cma.j.cn501113-20230210-00047] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Objective: To study using isotope-labeled relative and absolute quantitative proteomics methodologies to screen for salivary biological markers as a simple, non-invasive tool for identifying hepatitis B-related HCC at an early stage. Methods: Saliva samples were collected to extract salivary proteins. Isotope-labeled relative and absolute quantitative proteomics were used to analyze the differentially expressed proteins between the hepatocellular carcinoma (HCC) and non-HCC groups. Western blotting, immunohistochemistry, and enzyme-linked immunosorbent assays were used to verify differential proteins and identify markers in liver cancer tissues and saliva. Statistical analysis was used to analyze the diagnostic efficiency of salivary biomarkers. Results: 152 differentially expressed salivary proteins were screened out between the HCC and non-HCC groups. Western blot, immunohistochemistry, and enzyme-linked immunosorbent assays validated that the expressions of α-1-acid glycoprotein 1 (ORM1) and alpha-fetoprotein (AFP) were significantly increased in HCC (P < 0.05). There was a significant correlation between salivary AFP and serum AFP (P < 0.05). HCC was diagnosed when salivary α-1-acid glycoprotein 1 combined with AFP. The area under the receiver operating characteristic curve was 0.8726 (95% confidence interval: 0.8104 ~ 0.9347), the sensitivity was 78.3%, and the specificity was 88%. Conclusion: Salivary AFP and α-1-acid glycoprotein 1 can serve as potential biomarkers for hepatitis B-related hepatocellular carcinoma.
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Affiliation(s)
- Y H Lu
- Department of Infectious Diseases of People's Liberation Army, the 909th flospital, Dongnan Hospital of Xiamen University, Zhangzhou 363000, China
| | - Q Y Lu
- Department of Infectious Diseases of People's Liberation Army, the 909th flospital, Dongnan Hospital of Xiamen University, Zhangzhou 363000, China
| | - Z Y Yan
- Department of Infectious Diseases of People's Liberation Army, the 909th flospital, Dongnan Hospital of Xiamen University, Zhangzhou 363000, China
| | - C R Xu
- Department of Infectious Diseases of People's Liberation Army, the 909th flospital, Dongnan Hospital of Xiamen University, Zhangzhou 363000, China
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Jin YF, Li Y, Li JW, Yan ZY, Chen SY, Lou XM, Fan K, Wu F, Cao YY, Hu FY, Chen L, Xie YQ, Cheng C, Yang HY, Duan GC. [Epidemiological investigation on the local epidemic situation in Zhengzhou High-Tech Zone caused by SARS-CoV-2 Delta variant]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:43-47. [PMID: 36655256 DOI: 10.3760/cma.j.cn112150-20220315-00247] [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: 01/20/2023]
Abstract
This study collected epidemic data of COVID-19 in Zhengzhou from January 1 to January 20 in 2022. The epidemiological characteristics of the local epidemic in Zhengzhou High-tech Zone caused by the SARS-CoV-2 Delta variant were analyzed through epidemiological survey and big data analysis, which could provide a scientific basis for the prevention and control of the Delta variant. In detail, a total of 276 close contacts and 599 secondary close contacts were found in this study. The attack rate of close contacts and secondary close contacts was 5.43% (15/276) and 0.17% (1/599), respectively. There were 10 confirmed cases associated with the chain of transmission. Among them, the attack rates in close contacts of the first, second, third, fourth and fifth generation cases were 20.00% (5/25), 17.86% (5/28), 0.72% (1/139) and 14.81% (4/27), 0 (0/57), respectively. The attack rates in close contacts after sharing rooms/beds, having meals, having neighbor contacts, sharing vehicles with the patients, having same space contacts, and having work contacts were 26.67%, 9.10%, 8.33%, 4.55%, 1.43%, and 0 respectively. Collectively, the local epidemic situation in Zhengzhou High-tech Zone has an obvious family cluster. Prevention and control work should focus on decreasing family clusters of cases and community transmission.
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Affiliation(s)
- Y F Jin
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Y Li
- Zhengzhou High-tech Zone Center for Disease Control and Prevention,Zhengzhou 450001, China
| | - J W Li
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Z Y Yan
- Zhengzhou High-tech Zone Center for Disease Control and Prevention,Zhengzhou 450001, China
| | - S Y Chen
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - X M Lou
- Department of Maternal, Child and Adolescent Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - K Fan
- Zhengzhou High-tech Zone Center for Disease Control and Prevention,Zhengzhou 450001, China
| | - F Wu
- Zhengzhou High-tech Zone Center for Disease Control and Prevention,Zhengzhou 450001, China
| | - Y Y Cao
- Zhengzhou High-tech Zone Center for Disease Control and Prevention,Zhengzhou 450001, China
| | - F Y Hu
- Zhengzhou High-tech Zone Center for Disease Control and Prevention,Zhengzhou 450001, China
| | - L Chen
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Y Q Xie
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - C Cheng
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - H Y Yang
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - G C Duan
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
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Jia MM, Liu XZ, Qi L, Dai PX, Li Q, Jiang MY, Tang WW, Tan MW, Li TT, Jiang BS, Ren YH, Rao JL, Yan ZY, Cao YL, Yang WZ, Ran H, Feng L. [Application of pretrained model based on electronic medical record in recognition of acute respiratory infection]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:1543-1548. [PMID: 36372741 DOI: 10.3760/cma.j.cn1112150-20220805-00789] [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: 06/16/2023]
Abstract
Objective: To evaluate the recognition of acute respiratory infection (ARI) by a pretrained model based on electronic medical records (EMRs). Methods: 38 581 EMRs were obtained from Chongqing University Three Gorges Hospital in December 2021. Bidirectional encoder representation from transformers (BERT) pretrained model was used to identify ARI in EMRs. The results of medical professionals were considered as the gold standard to calculate the sensitivity, specificity, Kappa value, and area under the curve of the receiver operating characteristic (AUC). Results: There were 3 817 EMRs in the test set, with 1 200 ARIs. A total of 1 205 cases were determined as ARI by the model, with a sensitivity of 92.67% (1 112/1 200) and a specificity of 96.45% (2 524/2 617). The model identified ARI with similar accuracy in males and females (AUCs 0.95 and 0.94, respectively), and was more accurate in identifying ARI cases in those aged less than 18 than in adults 18-59 and adults 60 and older (AUCs 0.94, 0.89 and 0.94, respectively). The current model had a better identification of ARIs in outpatient patients than that in hospitalized patients, with AUCs of 0.74 and 0.95, respectively. Conclusion: The use of the BERT pretrained model based on EMRs has a good performance in the recognition of ARI cases, especially for the outpatients and juveniles. It shows a great potential to be applied to the monitoring of ARI cases in medical institutions.
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Affiliation(s)
- M M Jia
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
| | - X Z Liu
- Department of Infection Management, Chongqing University Three Gorges Hospital, Chongqing 404000, China
| | - L Qi
- Department of Infectious Disease Control and Prevention, Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400042, China
| | - P X Dai
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
| | - Q Li
- Department of Infectious Disease Control and Prevention, Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400042, China
| | - M Y Jiang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
| | - W W Tang
- Department of Infectious Disease Control and Prevention, Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400042, China
| | - M W Tan
- Department of Infection Management, Chongqing University Three Gorges Hospital, Chongqing 404000, China
| | - T T Li
- Department of Infectious Disease Control and Prevention, Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400042, China
| | - B S Jiang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
| | - Y H Ren
- Department of Infectious Disease Prevention and Control, Wanzhou District Center for Disease Control and prevention, Chongqing 404199, China
| | - J L Rao
- Department of Infection Management, Chongqing University Three Gorges Hospital, Chongqing 404000, China
| | - Z Y Yan
- Department of Infectious Disease Prevention and Control, Wanzhou District Center for Disease Control and prevention, Chongqing 404199, China
| | - Y L Cao
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
| | - W Z Yang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
| | - H Ran
- Department of Infectious Disease Prevention and Control, Wanzhou District Center for Disease Control and prevention, Chongqing 404199, China
| | - Luzhao Feng
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
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Yan ZY, Tan Y, Xie XY, He W, Guo CB, Cui NH. Computer-aided three-dimensional assessment of periodontal healing distal to the mandibular second molar after coronectomy of the mandibular third molar: a prospective study. BMC Oral Health 2020; 20:264. [PMID: 32972396 PMCID: PMC7513308 DOI: 10.1186/s12903-020-01250-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 09/09/2020] [Indexed: 01/19/2023] Open
Abstract
Background The periodontal healing distal to the mandibular second molar (M2M) after coronectomy of the M3M has shown controversial results. We aimed to combine a digital method with cone-beam computed tomography (CBCT) and estimate periodontal healing of M2M after M3M coronectomy. An accurate and stable indicator in three dimensions was also explored tentatively. Methods Patients with a M3M in contact with the inferior alveolar canal were included. CBCT was applied immediately after coronectomy (baseline) and 6-months later. Data were investigated with digital software for registration. Previously reported and coronectomy-related factors were included for univariate and multivariate analyses. Results A total of 181 patients (213 M3Ms) completed 6-month follow-up. Significant reduction in the distal intra-bony defect (DBD) depth of the M2M was shown (1.28 ± 1.24 mm, P < 0.001). DBD depth of the M2M at baseline was the most influential factor (r = 0.59), followed by preoperative M3M condition, age, rotation and migration of the root complex. Remaining enamel (OR = 6.93) and small retromolar space (0.67) contributed to re-contact of the root complex and M2M. Bone volume regenerated in the distal 2 mm was associated significantly with DBD-depth reduction (r = 0.74, P < 0.001). Conclusions Bone volume regenerated in the distal 2 mm of the M2M denoted stability of distal periodontal healing of the M2M. DBD depth at baseline was the most influential factor for healing of a DBD of the M2M after M3M coronectomy. The remaining enamel and a small retromolar space could contribute to re-contact of the root complex and the M2M. Trial registration China Clinical Trial Center, ChiCTR1800014862. Registered 10 February 2018,
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Affiliation(s)
- Z Y Yan
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, 22 South Street Zhong Guan Cun, Haidian District, Beijing, 100081, China
| | - Y Tan
- Department of Medical Statistics, Peking University Clinical Research Institute, Beijing, China
| | - X Y Xie
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China
| | - W He
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, 22 South Street Zhong Guan Cun, Haidian District, Beijing, 100081, China
| | - C B Guo
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, 22 South Street Zhong Guan Cun, Haidian District, Beijing, 100081, China.
| | - N H Cui
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, 22 South Street Zhong Guan Cun, Haidian District, Beijing, 100081, China.
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Yan ZY, Wang Y, Liu ZY, Li JM, Sun HM, Chen Y, Zhang SJ. [Chronic myelomonocytic leukemia treated with ruxolitinib: a case report]. Zhonghua Xue Ye Xue Za Zhi 2020; 40:622. [PMID: 28810340 PMCID: PMC7342278 DOI: 10.3760/cma.j.issn.0253-2727.2017.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Z Y Yan
- Department of Hematology, North Hospital of Ruijin Hospital Affiliated to Medical College of Shanghai Jiaotong University, Shanghai 200000, China
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Zhang S, Yan ZY, Wang D, Li SN, Xu Z, Tang QF. [Experimental study on the effects of tumor necrosis factor-α monoclonal antibody on autophagy level in allergic rhinitis mice]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 54:517-523. [PMID: 31315359 DOI: 10.3760/cma.j.issn.1673-0860.2019.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Objective: To observe the effect of tumor necrosis factor-α (TNF-α) monoclonal antibody on autophagy in allergic rhinitis (AR) mice. Methods: Thirty six weeks old BALB/c mice were randomly divided by random number table method into five groups: control group, model group (AR group), TNF-α antibody intervention group (AR+TNF-α group), autophagy inhibitor (3-methylindole, 3-NA) intervention group (AR+3-MA group), TNF-α antibody combined with autophagy inducer rapamycin (RAP) intervention group (AR+TNF-α+RAP group), with 6 mice in each group. AR model was established by conventional method, the corresponding reagent was administered before nasal cavity stimulation sensitization and during the whole experiment. Behavioral scores of mice were obtained, blood was collected from the eye socket, and mice in each group were sacrificed to collect nasal mucosa tissue samples. Pathological changes of nasal mucosa were observed by hematoxylin-eosin staining. Expression levels of inflammatory factor and IgE in serum were detected by enzyme-linked immunosorbent assay (ELISA). Expressions of autophagy related indicators microtubule-associated protein-1 light chain-3B (LC3B), Beclin-1, sequestosome1 (p62), autophagy-related 5 (ATG5), autophagy-related 7 (ATG7) were measured by Real-time PCR and Western blot. The aggregation of LC3B protein was observed by immunofluorescence. SPSS 19.0 software was used for statistical analysis. Results: Compared with the AR model group, symptoms of AR in AR+TNF-α group and AR+3-MA group were mild; the pathological changes of nasal mucosa were weak; the expression of IgE, TNF-α, interleukin 4 (IL-4), interferon-γ (IFN-γ) in serum significantly reduced (IgE: 666.19±78.35 (x±s) vs. 692.38±64.29 vs. 1 059.05±146.44, TNF-α: 112.06±12.95 vs. 113.17±15.43 vs. 161.22±17.96, IL-4: 54.05±7.14 vs. 58.26±5.67 vs. 79.95±6.33, IFN-γ: 28.58±4.51 vs. 30.67±2.60 vs. 39.83±3.31, all P<0.05), and the expression of LC3B Ⅱ/Ⅰ, Beclin-1, ATG5, ATG7 in nasal mucosa significantly decreased, the expression of p62 significantly elevated. After intervention with autophagy inducer RAP, the therapeutic effect of TNF-α monoclonal antibodies on AR was antagonized. Conclusion: TNF-α monoclonal antibody significantly improves nasal symptoms in AR mice by inhibiting autophagy levels.
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Affiliation(s)
- S Zhang
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Shenyang Medical College, Shenyang 110000, China
| | - Z Y Yan
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Shenyang Medical College, Shenyang 110000, China
| | - D Wang
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Shenyang Medical College, Shenyang 110000, China
| | - S N Li
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Shenyang Medical College, Shenyang 110000, China
| | - Z Xu
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Shenyang Medical College, Shenyang 110000, China
| | - Q F Tang
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Shenyang Medical College, Shenyang 110000, China
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Zhang JS, Yuan P, Yan ZY, Lu R, Li B, Geng XE, Mu J, Zhang HX. [Timeless promotes the proliferation of hepatocellular carcinoma cell by reprogramming of glucose metabolism]. Zhonghua Zhong Liu Za Zhi 2018; 40:499-505. [PMID: 30060357 DOI: 10.3760/cma.j.issn.0253-3766.2018.07.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the function and molecular mechanism of Timeless in promoting hepatocellular carcinoma (HCC) growth. Methods: The expression of Timeless in HCC and paracancer tissues were analyzed by using the public data of HCC. Timeless was overexpressed in MHCC97L cells and silenced in MHCC97H cells, respectively, and the expression of Timeless and its downstream molecules were detected by real-time PCR and western blot. The effects of Timeless on cell glycolysis, oxidative phosphorylation and proliferation were detected by the glucose uptake experiment, lactic acid detection experiment, the extracellular fluid pH detection experiment, cell oxygen consumption test and cell viability assay, respectively. Results: The level of Timeless in HCC tissue was significantly higher than that of paracancer tissue (P<0.05). The relative cellular glucose uptake levels in the groups of Timeless knockdown, including siTimeless-1 and siTimeless-2 group were 0.510±0.119 and 0.508±0.099, respectively, significantly different from that of control group (P<0.05); The relative cellular uptake level of Timeless overexpressed group was 1.953±0.324, significantly different from that of vector transfected group (P<0.05). The relative levels of lactic acid production in the siTimeless-1 and siTimeless-2 group were 0.579±0.096 and 0.550±0.120, respectively, significantly different from that of control group (P<0.05); The relative production level of lactic acid in the Timeless overexpressed group was 1.463±0.179, significantly different that of vector transfected group (P<0.05). The extracellular pH values of siTimeless-1 and siTimeless-2 group were 7.390±0.035 and 7.370±0.060, respectively, significantly different from that of control group (P<0.05); the extracellular pH value of Timeless overexpressed group was 7.130±0.031, significantly different than vector transfected group (P<0.05). Oxygen consumption rate of siTimeless-1 and siTimeless-2 group were 3.686±0.389 and 3.955±0.431, respectively, significantly higher than 1.690±0.297 of control group (P<0.05); Oxygen consumption rate of Timeless overexpressed group was 1.302±0.336, significantly lower than 3.185±0.262 of vector transfected group (P<0.05) Timeless inhibited the expression of p53. The cell glucose uptake, lactic acid production, the pH of extracellular culture medium and cell oxygen consumption of control group were not significantly different from that of Timeless and p53 co-silenced group [(si-Timeless+sip53) group] (P>0.05); the glucose uptake, the production of lactic acid, the pH of the extracellular culture medium and the oxygen consumption of Timeless co-transfected with p53 (Timeless+p53) group were not significantly different from those of vector transfected group (P>0.05). Timeless promoted the proliferation of HCC cells through inhibiting the expression of p53. Conclusion: Timeless promotes reprogramming of glucose metabolism and proliferation of HCC cells by inhibiting the p53-dependent signaling pathway.
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Affiliation(s)
- J S Zhang
- Department of Pain Treatment, Tangdu Hospital, the Fourth Military Medical University, Xi'an 710038, China
| | - P Yuan
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, the Fourth Military Medical University, Xi'an 710032, China
| | - Z Y Yan
- Department of Pain Treatment, Tangdu Hospital, the Fourth Military Medical University, Xi'an 710038, China
| | - R Lu
- Department of Pain Treatment, Tangdu Hospital, the Fourth Military Medical University, Xi'an 710038, China
| | - B Li
- Department of Pain Treatment, Tangdu Hospital, the Fourth Military Medical University, Xi'an 710038, China
| | - X E Geng
- Student Brigade, the Fourth Military Medical University, Xi'an 710032, China
| | - J Mu
- Department of Hematology, Xi'an Central Hospital, Xi'an 710003, China
| | - H X Zhang
- Department of Pain Treatment, Tangdu Hospital, the Fourth Military Medical University, Xi'an 710038, China
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Yan ZY, Sun XC. [LincRNA-ROR functions as a ceRNA to regulate Oct4, Sox2, and Nanog expression by sponging miR-145 and its effect on biologic characteristics of colonic cancer stem cells]. Zhonghua Bing Li Xue Za Zhi 2018; 47:284-290. [PMID: 29690669 DOI: 10.3760/cma.j.issn.0529-5807.2018.04.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the impact of lincRNA-ROR, a ceRNA by binding miR-145 on the expression of the downstream genes Oct4, Sox2 and Nanog, and related biological characteristics of colon cancer stem cells, and to elucidate the clinical significance of this molecular regulatory network. Methods: Fifty-two cases of colorectal cancer tissue and adjacent tissue were collected at Nanyang City Central Hospital and Nanyang Second Hospital, Henan Province, from 2014 to 2016. Real-time quantitative polymerase chain reaction (qPCR) was used to detect the expression of lincRNA-ROR and miR-145 in colorectal cancer tissue and isolated colon cancer cells. The correlation between the expression of lincRNA-ROR, miR-145 and the clinicopathologic features of colon cancer was performed. CD44(-)CD133(-) and CD44(+) CD133(+) cells were isolated from SW1116 by using flow cytometry. The expression of CD44, CD133, Oct4, Sox2, Nanog, lincRNA-ROR and miR-145 in cells were detected by qPCR. The relationship between lincRNA-ROR, miR-145, Oct4, Sox2 and Nanog was analyzed by bioinformatics, dual luciferase reporter assay, qPCR and Western blot. The effects of silencing lincRNA-ROR on the proliferation and chemosensitivity of colon cancer stem cells were detected by MTT, colony formation. Results: LincRNA-ROR was frequently up-regulated and inversely correlated with miR-145 down-regulation in the colon cancer specimens(P<0.05). LincRNA-ROR was related to tumor size, lymph node involvement and distant metastasis(P<0.05), and miR-145 was found related to tumor size and tumor location(P<0.05). CD44(+) CD133(+) cells were successfully isolated from SW1116 by flow cytometry. The levels of CD44, CD133, Oct4, Sox2, Nanog, lincRNA-ROR in CD44(+) CD133(+) cells were significantly increased, while miR-145 was decreased compared with CD44(-)CD133(-)cells(P<0.05). The levels of CD44, CD133, lnc-ROR in CD44(+) CD133(+) cells were significantly reduced upon cell adherence, while miR-145 was significantly increased(P<0.05). Bioinformatics analysis revealed that lincRNA-ROR shared miRNA response elements with core transcription factors Oct4, Sox2 and Nanog. MiR-145 significantly inhibited the expression of lincRNA-ROR, Oct4, Sox2 and Nanog. Silencing lincRNA-ROR significantly inhibited colon cancer stem cells proliferation and increased the sensitivity to chemotherapy. Conclusions: Linc-ROR functions as a key ceRNA to prevent core TFs, e. g., Oct4, Sox2, Nanog, from miR-145-mediated suppression in colon cancer stem cells and regulates cell proliferation and chemosensitivity.The data may provide insights into the pathophysiological interactions of the components of genetic networks in the development of colon cancer and may lead to new therapies in the future.
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Affiliation(s)
- Z Y Yan
- Department of Pathology, Nanyang City Center Hospital, Henan Province, Nanyang 473009, China
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10
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Wang Y, Chen Y, Chen YB, Yan ZY, Liu ZY, Li JM, Sun HM, Zhang SJ. [The investigation of CAG regimen in relapsed and refractory adult acute lymphoblastic leukemia]. Zhonghua Xue Ye Xue Za Zhi 2018; 39:339-341. [PMID: 29779335 PMCID: PMC7342125 DOI: 10.3760/cma.j.issn.0253-2727.2018.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Indexed: 11/05/2022]
Affiliation(s)
| | | | | | | | | | | | | | - S J Zhang
- Department of Hematology, Ruijin Hospital North Affiliated to Shanghai JiaoTong University School of Medicine, Shanghai 201800, China
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11
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Liu XG, Bai XC, Chen FP, Cheng YF, Dai KS, Fang MY, Feng JM, Gong YP, Guo T, Guo XH, Han Y, Hong LJ, Hu Y, Hua BL, Huang RB, Li Y, Peng J, Shu MM, Sun J, Sun PY, Sun YQ, Wang CS, Wang SJ, Wang XM, Wu CM, Wu WM, Yan ZY, Yang FE, Yang LH, Yang RC, Yang TH, Ye X, Zhang GS, Zhang L, Zheng CC, Zhou H, Zhou M, Zhou RF, Zhou ZP, Zhu HL, Zhu TN, Hou M. Chinese guidelines for treatment of adult primary immune thrombocytopenia. Int J Hematol 2018; 107:615-623. [PMID: 29619624 DOI: 10.1007/s12185-018-2445-z] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [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: 11/28/2017] [Revised: 03/22/2018] [Accepted: 03/22/2018] [Indexed: 02/05/2023]
Abstract
Primary immune thrombocytopenia (ITP) is a bleeding disorder commonly encountered in clinical practice. The International Working Group (IWG) on ITP has published several landmark papers on terminology, definitions, outcome criteria, bleeding assessment, diagnosis, and management of ITP. The Chinese consensus reports for diagnosis and management of adult ITP have been updated to the 4th edition. Based on current consensus positions and new emerging clinical evidence, the thrombosis and hemostasis group of the Chinese Society of Hematology issued Chinese guidelines for management of adult ITP, which aim to provide evidence-based recommendations for clinical decision making.
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Affiliation(s)
- Xin-Guang Liu
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Xiao-Chuan Bai
- General Hospital of Ningxia Medical University, Yinchuan, China
| | - Fang-Ping Chen
- Xiangya Hospital, Centre South University, Changsha, China
| | | | - Ke-Sheng Dai
- The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Mei-Yun Fang
- The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | | | - Yu-Ping Gong
- West China Hospital, Sichuan University, Chengdu, China
| | - Tao Guo
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xin-Hong Guo
- The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, China
| | - Yue Han
- The First Affiliated Hospital of Soochow University, Suzhou, China
| | | | - Yu Hu
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bao-Lai Hua
- Northern Jiangsu People's Hospital, Yangzhou, China
| | - Rui-Bing Huang
- The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yan Li
- The First Hospital of Chinese Medical University, Shenyang, China
| | - Jun Peng
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Mi-Mi Shu
- Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Jing Sun
- Nanfang Hospital, Nanfang Medical University, Guangzhou, China
| | - Pei-Yan Sun
- Xinqiao Hospital, The Third Military Medical University, Chongqing, China
| | - Yu-Qian Sun
- Peking University People's Hospital, Beijing, China
| | - Chun-Sen Wang
- Sichuan Provincial People's Hospital, Chengdu, China
| | - Shu-Jie Wang
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiao-Min Wang
- People's Hospital of Xinjiang Uygur Autonomous Region, Ürümqi, China
| | - Cong-Ming Wu
- Hainan Provincial People's Hospital, Haikou, China
| | - Wen-Man Wu
- Ruijin Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zhen-Yu Yan
- Affiliated Hospital of North China University of Science and Technology, Tangshan, China
| | - Feng-E Yang
- Union Hospital of Fujian Medical University, Fuzhou, China
| | - Lin-Hua Yang
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Ren-Chi Yang
- Institute of Haematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences, Tianjin, China
| | - Tong-Hua Yang
- The First People's Hospital of Yunnan Province, Kunming, China
| | - Xu Ye
- The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Guang-Sen Zhang
- The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lei Zhang
- Institute of Haematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences, Tianjin, China
| | | | - Hu Zhou
- Henan Cancer Hospital, Zhengzhou, China
| | - Min Zhou
- Chengdu Women and Children's Hospital, Chengdu, China
| | | | - Ze-Ping Zhou
- The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Hong-Li Zhu
- Chinese PLA General Hospital, Beijing, China
| | - Tie-Nan Zhu
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ming Hou
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, 250012, China.
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Wei ZY, Feng MM, Yang B, Yan ZY, Wang BQ, Bu XY. Methylmercury-l-Cysteine targeting L-type amino acid transporter conjugate cytotoxicity on C6 glioma cells. J BIOL REG HOMEOS AG 2018; 32:147-151. [PMID: 29504379] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Glioma is the most common primary tumor in the brain, accounting for about 40~50% of intracranial primary tumors. Most chemotherapeutic drugs have difficulty in penetrating the blood-brain barrier, and their clinical applications are greatly limited. We evaluated the effects of methylmercury-L-cysteine (MeHg-L-cys) and methylmercury chloride (MMC) on apoptosis of C6 glioma cells. L-type amino acid transporter (LAT1) was used to investigate the targeted transport function and cytotoxicity of MeHg- L-cys in glioma. MeHg-L-cys enhanced the ability of targeting glioma cells and reduced the adverse reactions to normal brain tissues. Therefore, it is significantly important to develop new anti-glioma drugs targeting the blood-brain barrier.
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Affiliation(s)
- Z Y Wei
- Department of Neurosurgery, The No.371 Central Hospital of the Peoples Liberation Army, Xinxiang, China
| | - M M Feng
- Department of Neurosurgery, Henan Provincial Peoples Hospital, The Peoples Hospital of Zhengzhou University, The Peoples Hospital of Henan University, Zhengzhou, China
| | - B Yang
- Department of Neurosurgery, Henan Provincial Peoples Hospital, The Peoples Hospital of Zhengzhou University, The Peoples Hospital of Henan University, Zhengzhou, China
| | - Z Y Yan
- Department of Neurosurgery, Henan Provincial Peoples Hospital, The Peoples Hospital of Zhengzhou University, The Peoples Hospital of Henan University, Zhengzhou, China
| | - B Q Wang
- Department of Neurosurgery, Henan Provincial Peoples Hospital, The Peoples Hospital of Zhengzhou University, The Peoples Hospital of Henan University, Zhengzhou, China
| | - X Y Bu
- Department of Neurosurgery, Henan Provincial Peoples Hospital, The Peoples Hospital of Zhengzhou University, The Peoples Hospital of Henan University, Zhengzhou, China
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13
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Hao XY, Wang LH, Xie YY, Qi WY, Zhang S, Yang MR, Yan ZY, Chen NY. [A Preliminary Exploration on the Pathogenesis of Osteopenia in Patients with Hemophilia]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2016; 24:810-4. [PMID: 27342515 DOI: 10.7534/j.issn.1009-2137.2016.03.033] [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: 11/22/2022]
Abstract
OBJECTIVE To investigate the influencing factors and pathogenesis of osteopenia in the patients with hemophilia. METHODS Twenty-three patients with hemophilia were admitted in the hospital affiliated to North China University of Science and technology from March to August 2015, including 13 severe cases, 10 mild and moderate cases. All the patients accepted the detection of serum I collagen cross-linking N terminal peptide (NTX I), osteoprotegerin (OPG), bone alkaline phosphatase (BALP), basic fibroblast growth factor (bFGF), insulin-like growth factor (IGF) and transforming growth factor-β1 (TGF-β1), the score scale of activity ability was recorded according to the criteria published by the U.S. Center for disease prevention and control in 2002, and 21 patients received the measurement of bone mineral density. According to the World Health Organization (WHO) definition, the clinical significance of bone mineral density (BMD) was assessed by measuring the Z level. RESULTS Z level>-2 was recorded in 10 cases, Z≤-2 was recorded in 11 cases; the levels of body mass index (BMI) and human bone alkaline phosphatase (BALP) reflecting bone formation in 11 cases (Z≤-2) were lower than there in 10 cases (Z>-2) (P<0.05); the levels of BALP (r=0.489, P<0.05), IGF (r=0.538, P<0.05) and BMI (r=0.572, P<0.01) positively correlated significantly with BMD (P<0.05); the levels of bFGF (r=0.570, P<0.01) and OPG (r=0.505, P<0.05) positively correlated with NTX I, indicating bone destruction (P<0.05); the score of activity ability of severe patients was significantly lower than that of mild and moderate cases (P<0.05), BMD levels of these 2 groups were not statistically different (P>0.05). CONCLUSION The BMD level does not correlate with the clinial grouping of hemophilia, the low body mass index may be a risk factor for bone lose; the mechanism of hemophilia patient's bone lose may be related with the decrease of osteogenic activity, the IGF can prevent bone lose in hemophilia, the bFGF and OPG can promote bone metabolism of the patients with hemophilia.
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Affiliation(s)
- Xiao-Yang Hao
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
| | - Lin-Hong Wang
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
| | - Yan-Yan Xie
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
| | - Wen-Yue Qi
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
| | - Song Zhang
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
| | - Mei-Rong Yang
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
| | - Zhen-Yu Yan
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China. E-mail:
| | - Nai-Yao Chen
- Department of Hematology, The Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
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Yan ZY, Ban T, Fan Y, Chen WR, Sun HL, Chen H, Qiao QF, Li BY. Na+-induced Ca2+ influx through reverse mode of Na+-Ca2+ exchanger in mouse ventricular cardiomyocyte. Oncotarget 2015; 6:23272-80. [PMID: 26314851 PMCID: PMC4695117 DOI: 10.18632/oncotarget.4878] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 06/15/2015] [Accepted: 07/24/2015] [Indexed: 01/06/2023] Open
Abstract
Background Dobutamine is commonly used for clinical management of heart failure and its pharmacological effects have long been investigated as inotropics via β–receptor activation. However, there is no electrophysiological evidence if dobutamine contributes inotropic action due at least partially to the reverse mode of Na+-Ca2+ exchanger (NCX) activation. Methods Action potential (AP), voltage-gated Na+ (INa), Ca2+ (ICa), and K+ (Ito and IK1) currents were observed using whole-cell patch technique before and after dobutamine in ventricular cardiomyocytes isolated from adult mouse hearts. Another sets of observation were also performed with Kb-r7943 or in the solution without [Ca2+]o. Results Dobutamine (0.1–1.0 μM) significantly enhanced the AP depolarization with prolongation of AP duration (APD) in a concentration-dependent fashion. The density of INawas also increased concentration-dependently without alternation of voltage-dependent steady-status of activation and inactivation, reactivation as well. Whereas, the activities for ICa, Ito, and IK1 were not changed by dobutamine. Intriguingly, the dobutamine-mediated changes in AP repolarization were abolished by 3 μM Kb-r7943 pretreatment or by simply removing [Ca2+]o without affecting accelerated depolarization. Additionally, the ratio of APD50/APD90 was not significantly altered in the presence of dobutamine, implying that effective refractory period was remain unchanged. Conclusion This novel finding provides evidence that dobutamine upregulates of voltage-gated Na+ channel function and Na+ influx-induced activation of the reverse mode of NCX, suggesting that dobutamine may not only accelerate ventricular contraction via fast depolarization but also cause Ca2+ influx, which contributes its positive inotropic effect synergistically with β-receptor activation without increasing the arrhythmogenetic risk.
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Affiliation(s)
- Zhen-Yu Yan
- Department of Pharmacology, Harbin Medical University, Harbin, China.,Riley Heart Research Center, Division of Pediatric Cardiology, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, USA
| | - Tao Ban
- Department of Pharmacology, Harbin Medical University, Harbin, China.,Key Laboratory of Cardiovascular Medicine Research, Harbin Medical University, Harbin, China
| | - Yao Fan
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Wei-Ran Chen
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Hong-Li Sun
- Department of Pharmacology, Da-Qing Campus of Harbin Medical University, Da-Qing, China
| | - Hanying Chen
- Department of Pharmacology, Da-Qing Campus of Harbin Medical University, Da-Qing, China
| | - Quo-Fen Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China.,Key Laboratory of Cardiovascular Medicine Research, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
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Zhang YY, Yan ZY, Qu MY, Guo XJ, Li G, Lu XL, Liu Y, Ban T, Sun HL, Qiao GF, Li BY. KCa1.1 is potential marker for distinguishing Ah-type baroreceptor neurons in NTS and contributes to sex-specific presynaptic neurotransmission in baroreflex afferent pathway. Neurosci Lett 2015. [DOI: 10.1016/j.neulet.2015.07.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yan ZY, He JL, Wen X, Zuo M, Guo XJ, Guo TZ, Schild JH, Qiao GF, Li BY. Retracted: Significant variations in afferent conduction and axonal morphology of aortic depressive nerve imply broader spectrum of baroreflex function of myelinated Ah-type baroreceptor neurons in female rats. Int J Cardiol 2014; 176:1280-3. [PMID: 25127981 DOI: 10.1016/j.ijcard.2014.07.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 07/27/2014] [Indexed: 11/15/2022]
Affiliation(s)
- Zhen-Yu Yan
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Jian-Li He
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xin Wen
- Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Meng Zuo
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xin-Jing Guo
- Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Tian-Zhu Guo
- Department of Immunology, Capital Medical University School of Basic Medical Science, 10 Xitoutiao, Youanmen, Fengtai District, Beijing 10069, China
| | - John H Schild
- Department of Biomedical Engineering, School of Technology and Engineering, IN University Purdue University Indianapolis, Indianapolis, USA
| | - Guo-Fen Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China.
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Yan ZY, He JL, Wen X, Zuo M, Guo XJ, Guo TZ, Schild JH, Qiao GF, Li BY. Retraction notice to Significant variations in afferent conduction and axonal morphology of aortic depressive nerve imply broader baroreflex function of myelinated Ah-type baroreceptor neurons in female rats. Int J Cardiol 2014; 176:R2. [DOI: 10.1016/j.ijcard.2014.11.022] [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: 10/24/2022]
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Xu B, Zhu JX, Huo R, Yan ZY, He JL, Deng L, Wang JX, He J, Qiao GF, Chen H, Li BY. Alternations of cardiac IK1 and Ito from FKBP12.6 transgenic mouse heart and potential impact of cardiac hypertrophy. Int J Cardiol 2014; 176:1017-20. [PMID: 25189487 DOI: 10.1016/j.ijcard.2014.07.081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 07/24/2014] [Indexed: 10/25/2022]
Affiliation(s)
- Bing Xu
- Department of Pharmacology of Harbin Medical University, Harbin, China
| | - Jiu-Xin Zhu
- Department of Pharmacology of Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Rong Huo
- Department of Pharmacology of Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Zhen-Yu Yan
- Department of Pharmacology of Harbin Medical University, Harbin, China; Riley Heart Research Center, Division of Pediatric Cardiology, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, IN University School of Medicine, Indianapolis, USA
| | - Jian-Li He
- Department of Pharmacology of Harbin Medical University, Harbin, China
| | - Lin Deng
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jian-Xin Wang
- Department of Pharmacology of Harbin Medical University, Harbin, China
| | - Jian He
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Guo-Fen Qiao
- Department of Pharmacology of Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Hanying Chen
- Riley Heart Research Center, Division of Pediatric Cardiology, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, IN University School of Medicine, Indianapolis, USA
| | - Bai-Yan Li
- Department of Pharmacology of Harbin Medical University, Harbin, China.
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Yan ZY, Tian X, Li Y, Yang MR, Zhang S, Wang XM, Zhang HX, Cheng NY. [Changes of CD34(+) and CD71(+)CD45(-) cell levels in bone marrow of MDS and AA patients]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2014; 22:382-6. [PMID: 24763009 DOI: 10.7534/j.issn.1009-2137.2014.02.021] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was aimed to investigate the changes of CD34(+) and CD71(+)CD45(-) cell levels in MDS and AA patients. A total of 25 cases MDS and 43 cases of AA (18 cases SAA and 25 cases of NSAA) from January 2010 to October 2013 in the Department of Hematology, affiliated hospital of Hebei United University were enrolled in this study. The complete blood count, bone marrow smears, bone marrow biopsy, karyotype analysis and bone marrow blood cell immune genotyping (mainly the proportion of CD34(+) cells, CD71(+)CD45(-) cells in nucleated cells) were carried out for all patients; the changes of CD34(+) and CD71(+)CD45(-) cell levels in patients with MDS and AA (SAA NSAA) were compared; the differences of white blood cell count, platelet count and hemoglobin concentration in patients with count of CD71(+)CD45(-) ≥ 15% or <15% were analyzed. The results showed that the count of CD34(+) in MDS group was higher than that in AA (NSAA and SAA) group (P < 0.05). The count of CD71(+)CD45(-) cells in MDS group was higher than that in SAA (P < 0.05), there was no significant difference between NSAA group and MDS group. In MDS group with CD71(+)CD45(-) ≥ 15%, the platelet count was significantly higher than that in NSAA group (P < 0.05); and there was no statistical difference for leukocyte, platelet count and hemoglobin level between MDS and NSAA group with CD71(+)CD45(-) <15% (P > 0.05). It is concluded that the count of CD34(+) cells in MDS patients is significantly higher than that in AA and SAA patients. The count of CD71(+)CD45(-) cells in MDS group is significantly higher than that of SAA group. The platelet count in MDS patients with CD71(+)CD45(-) cells ≥ 15% is significantly higher than that of the NSAA group.
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Affiliation(s)
- Zhen-Yu Yan
- Department of Hematology, Affiliated Hospital of Hebei United University, Tangshan 063000, Hebei Province, China. E-mail:
| | - Xu Tian
- Department of Hematology, Qianxi County People's Hospital of Hebei, Qianxi 064300, Hebei Province, China
| | - Ying Li
- Department of Hematology, Kailuan General Hospital, Tangshan 063000, Hebei Province, China
| | - Mei-Rong Yang
- Department of Hematology, Affiliated Hospital of Hebei United University, Tangshan 063000, Hebei Province, China
| | - Song Zhang
- Department of Hematology, Affiliated Hospital of Hebei United University, Tangshan 063000, Hebei Province, China
| | - Xie-Ming Wang
- Department of Hematology, Affiliated Hospital of Hebei United University, Tangshan 063000, Hebei Province, China
| | - Hai-Xia Zhang
- Department of Hematology, Affiliated Hospital of Hebei United University, Tangshan 063000, Hebei Province, China
| | - Nai-Yao Cheng
- Department of Hematology, Affiliated Hospital of Hebei United University, Tangshan 063000, Hebei Province, China
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Li JN, Qian Z, Xu WX, Xu B, Lu XL, Yan ZY, Han LM, Liu Y, Yuan M, Schild J, Qiao GF, Li BY. Gender differences in histamine-induced depolarization and inward currents in vagal ganglion neurons in rats. Int J Biol Sci 2013; 9:1079-88. [PMID: 24339729 PMCID: PMC3858581 DOI: 10.7150/ijbs.7595] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 11/06/2013] [Indexed: 01/13/2023] Open
Abstract
Evidence has shown gender differences regarding the critical roles of histamine in the prevalence of asthma, anaphylaxis, and angina pectoris. Histamine depolarizes unmyelinated C-type neurons without any effects on myelinated A-type vagal ganglion neurons (VGNs) in male rats. However, little is known if VGNs from females react to histamine in a similar manner. Membrane depolarization and inward currents were tested in VGNs isolated from adult rats using a whole-cell patch technique. Results from males were consistent with the literature. Surprisingly, histamine-induced depolarization and inward currents were observed in both unmyelinated C-type and myelinated A- and Ah-type VGNs from female rats. In Ah-type neurons, responses to 1.0 μM histamine were stronger in intact females than in males and significantly reduced in ovariectomized (OVX) females. In C-type neurons, histamine-induced events were significantly smaller (pA/pF) in intact females compared with males and this histamine-induced activity was dramatically increased by OVX. Female A-types responded to histamine, which was further increased following ovariectomy. Histamine at 300 nM depolarized Ah-types in females, but not Ah-types in OVX females. In contrast, the sensitivity of A- and C-types to histamine was upregulated by OVX. These data demonstrate gender differences in VGN chemosensitivity to histamine for the first time. Myelinated Ah-types showed the highest sensitivity to histamine across female populations, which was changed by OVX. These novel findings improve the understanding of gender differences in the prevalence of asthma, anaphylaxis, and pain. Changes in sensitivity to histamine by OVX may explain alterations in the prevalence of certain pathophysiological conditions when women reach a postmenopausal age.
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Affiliation(s)
- Jun-Nan Li
- 1. Department of Pharmacology, Harbin Medical University, Harbin, China
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21
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Qiao GF, Qian Z, Sun HL, Xu WX, Yan ZY, Liu Y, Zhou JY, Zhang HC, Wang LJ, Pan XD, Fu Y. Remodeling of hyperpolarization-activated current, Ih, in Ah-type visceral ganglion neurons following ovariectomy in adult rats. PLoS One 2013; 8:e71184. [PMID: 23951107 PMCID: PMC3741359 DOI: 10.1371/journal.pone.0071184] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 06/27/2013] [Indexed: 12/21/2022] Open
Abstract
Hyperpolarization-activated currents (Ih) mediated by hyperpolarization-activated cyclic nucleotide-gated (HCN) channels modulate excitability of myelinated A− and Ah-type visceral ganglion neurons (VGN). Whether alterations in Ih underlie the previously reported reduction of excitability of myelinated Ah-type VGNs following ovariectomy (OVX) has remained unclear. Here we used the intact nodose ganglion preparation in conjunction with electrophysiological approaches to examine the role of Ih remodeling in altering Ah-type neuron excitability following ovariectomy in adult rats. Ah-type neurons were identified based on their afferent conduction velocity. Ah-type neurons in nodose ganglia from non-OVX rats exhibited a voltage ‘sag’ as well as ‘rebound’ action potentials immediately following hyperpolarizing current injections, which both were suppressed by the Ih blocker ZD7288. Repetitive spike activity induced afterhyperpolarizations lasting several hundreds of milliseconds (termed post-excitatory membrane hyperpolarizations, PEMHs), which were significantly reduced by ZD7288, suggesting that they resulted from transient deactivation of Ih during the preceding spike trains. Ovariectomy reduced whole-cell Ih density, caused a hyperpolarizing shift of the voltage-dependence of Ih activation, and slowed Ih activation. OVX-induced Ih remodeling was accompanied by a flattening of the stimulus frequency/response curve and loss of PEMHs. Also, HCN1 mRNA levels were reduced by ∼30% in nodose ganglia from OVX rats compared with their non-OVX counterparts. Acute exposure of nodose ganglia to 17beta-estradiol partly restored Ih density and accelerated Ih activation in Ah-type cells. In conclusion, Ih plays a significant role in modulating the excitability of myelinated Ah-type VGNs in adult female rats.
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Affiliation(s)
- Guo-Fen Qiao
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, Heilongjiang, China
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Zhao Qian
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Hong-Li Sun
- Department of Pharmacology, Da-Qing Campus of Harbin Medical University, Da-Qing, Heilongjiang, China
| | - Wen-Xiao Xu
- Department of Orthopedics, the First Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang, China
| | - Zhen-Yu Yan
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Yang Liu
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Jia-Ying Zhou
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Hao-Cheng Zhang
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Li-Juan Wang
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Xiao-Dong Pan
- Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Yili Fu
- State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, Heilongjiang, China
- * E-mail:
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Lu XL, Xu WX, Yan ZY, Qian Z, Xu B, Liu Y, Han LM, Gao RC, Li JN, Yuan M, Zhao CB, Qiao GF, Li BY. Subtype identification in acutely dissociated rat nodose ganglion neurons based on morphologic parameters. Int J Biol Sci 2013; 9:716-27. [PMID: 23904796 PMCID: PMC3729014 DOI: 10.7150/ijbs.7006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [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: 06/25/2013] [Accepted: 07/01/2013] [Indexed: 01/04/2023] Open
Abstract
Nodose ganglia are composed of A-, Ah- and C-type neurons. Despite their important roles in regulating visceral afferent function, including cardiovascular, pulmonary, and gastrointestinal homeostasis, information about subtype-specific expression, molecular identity, and function of individual ion transporting proteins is scarce. Although experiments utilizing the sliced ganglion preparation have provided valuable insights into the electrophysiological properties of nodose ganglion neuron subtypes, detailed characterization of their electrical phenotypes will require measurements in isolated cells. One major unresolved problem, however, is the difficulty to unambiguously identify the subtype of isolated nodose ganglion neurons without current-clamp recording, because the magnitude of conduction velocity in the corresponding afferent fiber, a reliable marker to discriminate subtypes in situ, can no longer be determined. Here, we present data supporting the notion that application of an algorithm regarding to microscopic structural characteristics, such as neuron shape evaluated by the ratio between shortest and longest axis, neuron surface characteristics, like membrane roughness, and axon attachment, enables specific and sensitive subtype identification of acutely dissociated rat nodose ganglion neurons, by which the accuracy of identification is further validated by electrophysiological markers and overall positive predictive rates is 89.26% (90.04%, 76.47%, and 98.21% for A-, Ah, and C-type, respectively). This approach should aid in gaining insight into the molecular correlates underlying phenotypic heterogeneity of nodose ganglia. Additionally, several critical points that help for neuron identification and afferent conduction calibration are also discussed.
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Affiliation(s)
- Xiao-Long Lu
- Department of Pharmacology, Harbin Medical University, Harbin, China
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23
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Zhang LZ, Zhang CQ, Yan ZY, Yang QC, Jiang Y, Zeng BF. Tumor-initiating cells and tumor vascularization. Pediatr Blood Cancer 2011; 56:335-40. [PMID: 21225908 DOI: 10.1002/pbc.22886] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Accepted: 09/27/2010] [Indexed: 12/18/2022]
Abstract
Tumor-initiating cells (TICs) with stem-like cell properties initiate and sustain progressive growth, resulting in a heterogeneous tumor mass. The survival and growth of tumors rely on the development of a vasculature to provide nutrients and oxygen. Crosstalk between TICs and vascularization may be one of the central players in the initiation, long-term maintenance, and progression of tumors. This review surveys current evidence concerning the crosstalk that occurs in tumor/stromal interactions, including genetic change, vascular niche, hypoxia, and dormancy of tumors. A better understanding of this crosstalk might help provide the basis for developing more effective therapeutic drug targets.
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Affiliation(s)
- Li-Zhi Zhang
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, Shanghai Jiaotong University, Shanghai, China
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Chen NY, Wang J, Wang XM, Zhang HX, Yan ZY, Wang YM, Zhang S, Yan B. [Effects of STI571 combined with As₂O₃ on proliferation, apoptosis and caspase 3, Bcl-xL expression of K562 cells]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2010; 18:882-886. [PMID: 20723293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This study was aimed to explore the effects of STI571 alone or with As₂O₃ on proliferation, apoptosis and caspase 3, bcl-xL mRNA expression of K562 cells, and the molecular mechanism of As₂O₃ enhancing the anti-leukemia effect of STI571 so as to provide the scientific basis for clinical treatment of chronic myeloid leukemia. The effect of drugs on proliferation of K562 cells was assayed by MTT method, the apoptosis rate of K562 cells was detected by flow cytometry with Annexin V/PI double staining, the caspase 3, bcl-xL mRNA expressions of K562 cells were determined by real time quantitative PCR. The results showed that STI571 alone or with As₂O₃ both could inhibit the proliferation of K562 cells. OD value in test groups reduced along with prolonging of action times, the OD values between different time points were significantly different (p < 0.05), furthermore the OD values at 72 hours in test groups were lowest, while as compared with control group, OD values at same time points in test groups all gradually decreased, among which decrease of OD value in test 5 group was most significant. The flow cytometric detection indicated that along with time prolonging, the apoptotic rate in control group not obviously changed, but the apoptotic rate in test groups gradually increased, the difference between time points was significant (p < 0.05), moreover apoptotic rate increased most obviously at 72 hours, while as compared with control group, apoptotic rate at same time points in test groups was gradually enhanced (p < 0.05), among which the apoptotic rate in test 5 group was highest. The real time qPCR assay revealed that as compared with control group, the bcl-xL mRNA expression in test groups reduced with decrease of 2-ΔΔCT value, furthermore the decrease of expression level in test 3 group was higher than that in test 2 group (p < 0.05), while the caspase 3 mRNA expression in test groups was enhanced with increase of 2-ΔΔCT value, moreover the increase of expression level in test 3 group was higher than that in test 2 group (p < 0.05). It is concluded that the STI571 can inhibit the proliferation of K562 cells, accelerate the apoptosis of K562 cells. The STI571 combined with As₂O₃ can enhance these two effects, increase the expression of caspase-3 mRNA and decrease the expression of bcl-xL mRNA. Therefore, the effect of STI571 combined with As₂O₃ on expression of caspase 3 and bcl-xL mRNA may be one of molecular mechanisms underlying their synergic antileukemia efficacy.
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Affiliation(s)
- Nai-Yao Chen
- Department of Hematology, North China Coal Medical College Affiliated Hospital, Tangshan 063000, Hebei Province, China.
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25
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Tan KK, Yan ZY, Vijayan A, Chiu MT. Management of diaphragmatic rupture from blunt trauma. Singapore Med J 2009; 50:1150-1153. [PMID: 20087550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
INTRODUCTION Diagnosis of diaphragmatic rupture is difficult, and delays could result in a catastrophic outcome. We reviewed our institution's management of patients with diaphragmatic rupture after blunt trauma. METHODS All patients in this study were treated at Tan Tock Seng Hospital, Singapore, from March 2002 to October 2008. Patients with penetrating injuries were excluded. The parameters included age, mechanism of injury, haemodynamic status at admission, Glasgow coma scale (GCS) score, injury severity score (ISS), imaging studies, location of diaphragmatic injuries, associated injuries and outcome. RESULTS 14 patients with a median age of 38 years formed the study group. Vehicular-related incidents accounted for 71.4 percent of the injuries. The median GCS score on admission was 14 (range 3-15), while the median systolic blood pressure and heart rate were 94 (range 50-164) mmHg and 110 (range 76-140) beats per minute, respectively. The median ISS was 41 (range 14-66). All had chest radiographs performed in the emergency department, six (42.9 percent) had computed tomography performed before surgery, while the remaining eight (57.1 percent) were sent straight to the operating theatre from the emergency department. There were five (35.7 percent) right-sided and nine (64.3 percent) left-sided diaphragmatic ruptures. The mortality rate was 35.7 percent. Some of the associated injuries included eight (57.1 percent) splenic lacerations, five (35.7 percent) haemothorax and lung injuries, four (28.6 percent) bone fractures and three (21.4 percent) liver lacerations. 12 (85.7 percent) patients underwent repair of the diaphragmatic rupture using interrupted polypropylene suture, while the remaining two (14.3 percent) were too haemodynamically unstable to undergo definitive treatment. Advanced age, haemodynamic instability and raised ISS were associated with mortality. CONCLUSION An accurate diagnosis of diaphragmatic rupture in trauma patients is difficult, and a thorough examination of both the hemidiaphragms is mandatory during emergency laparotomy for these patients. Those with more severe injuries and decreased physiological reserves usually fare worse.
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Affiliation(s)
- K K Tan
- Department of General Surgery, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore.
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Abstract
BACKGROUND AND PURPOSE Primary chordoma in the nasal cavity and nasopharynx is an extremely rare tumor in the extraosseous axial skeleton. Unlike intracranial chordomas, lesions in these sites primarily present as a soft tissue mass without involvement of the skull base bone (clivus), so the preoperative diagnosis of the tumor is possibly difficult. Here, we reviewed the imaging features of 5 cases of chordomas in the nasal cavity and nasopharynx that resulted in successful diagnosis and differential diagnosis of this rare tumor. MATERIALS AND METHODS We retrospectively studied 5 patients with histologically proven chordomas in the nasal cavity and nasopharynx. The lesion features of CT and MR imaging were reviewed, with emphasis on the size, shape, location, margin, calcification, CT attenuation characteristics, signal intensity, and degree of MR imaging enhancement. RESULTS Expansible and lobular soft tissue masses were mainly present, with irregular intratumor calcification in all 5 cases on CT examination. MR imaging revealed a well-defined tumor with heterogeneous signal intensity in 4 patients, whereas homogeneous signal intensity in 1 patient was present on all pulse sequences. Four cases of nasopharyngeal mass showed mild to moderate heterogenous enhancement. Intratumor septa could be seen in 2 cases. CONCLUSIONS Although no imaging features are pathognomonic, primary chordomas without skull base (clivus) bony changes in the nasal cavity and nasopharynx have some CT and MR imaging findings that are suggestive of diagnosis. The differential diagnosis of the soft tissue mass should be limited to these sites.
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Affiliation(s)
- Z Y Yan
- Department of Radiology, Capital Medical University, Beijing Tongren Hospital, Beijing, China
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27
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Yan ZY, Fan LK, Li KX, Wang XY, Hua BL, Wang SJ, Zhao YQ. [Frequency of factor VIII inhibitor in the patients with hemophilia A and environmental risk factors for inhibitor development]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2009; 31:580-583. [PMID: 19968075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To screen for factor VIII inhibitor in patients with hemophilia A (HA) and explore the environmental risk factors for inhibitor development. METHODS Totally 265 patients with HA were enrolled, including 107 consecutive inpatients and outpatients in Peking Union Medical College Hospital from April 2003 to April 2007 and 158 patients newly recruited from other hospitals. FVIII: C activity was measured by one-stage coagulation assay. FVIII inhibitor was determined using Bethesda method. RESULTS In 265 HA patients, FVIII inhibitor was detected in 22 patients (8.3%). Nine of them (86.4%) were low responders (inhibitor titers < or = 5 000 BU/L), 3 (13.6%) were high responders (the titers > 5 000 BU/L). The frequency of FVIII inhibitor was 50% in the patients aged over 50 years, which was significantly higher than those in other age groups (P = 0. 000). Among 158 newly recruited patients with full clinical data, the frequency of FVIII inhibitor was 12.8% in patients who had received infusion of FVIII products for more than 12 doses on average each year, while it was 5.8% in whom the infusion doses were less than 12 (P = 0.156). The frequency of FVIII inhibitor was 28.5% in patients with a history of continuous infusion of FVIII products whereas it was only 1.6% in patients without such history (P = 0.000). In patients who exposed to multiple-branded or single-branded FVIII products, the frequencies of FVIII inhibitor were 9.3% and 3.9%, respectively (P = 0.229). CONCLUSION The development of factor VIII inhibitor in patients with hemophilia A may be related to the age and the history of continuous infusion of FVIII products.
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Affiliation(s)
- Zhen-Yu Yan
- Department of Hematology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China
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Yan ZY, Hua BL, Ma XH, Jiang JY, Fan LK, Wang SJ, Zhu TN, Bai CM, Pan JQ, Zhao YQ. [Risk factors analysis in 672 hospitalized patients with venous thromboembolism]. Zhonghua Xue Ye Xue Za Zhi 2007; 28:579-582. [PMID: 18246810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
OBJECTIVES To explore the frequency, clinical features and risk factors of venous thromboembolism (VTE) in hospitalized patients. METHODS The frequency, demographic features, and acquired and inherited factors of in-patient cases of VTE in Peking union medical college hospital from 1994 to 2004 were analyzed retrospectively. RESULTS Six hundred and seventy-two patients were enrolled. Among them, male to female ratio was 1.2 and the median age was 53 (14 - 92). Five hundred and eighty (86.3%) patients were at their first diagnosis with the peak ages between 40 and 50 for men and 50 and 60 for women. More common acquired risk factors were antiphospholipid antibody syndrome (APS) (32.0%), trauma / surgery (31.1%) and malignancies (17.1%). 35.7% of the patients had multiple acquired risk factors. Before the initiation of anticoagulation therapy, the activities of protein C (PC), protein S (PS) and antithrombin (AT) were measured in 94 patients. The deficiency of these three natural anticoagulants was 44.7%. Among the anticoagulant deficiencies, PC deficiency was the commonest one (13.8%). Combined deficiency of PC and AT accounted for 10.6%. 31.6% of the 94 patients had inherited plus acquired risk factors. CONCLUSIONS Age for the first event of VTE in the men was about 10 years ahead of that in the women. The major acquired risk factors were APS, trauma/surgery and malignancies, and inherited risk factors were PC deficiency and PC + AT combined deficiencies. It seems that the coexistence of multiple risk factors plays an important role in triggering VTE.
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Affiliation(s)
- Zhen-Yu Yan
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
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Abstract
Over the past several years, neurotrophic factors have made considerable progress from the laboratory into the clinic. Evidence from preclinical and clinical studies indicates that it may be possible to use neurotrophic factors to prevent, slow the progression of, or even reverse the effects of a number of neurodegenerative diseases and other types of insults in both the central and peripheral nervous system. Their potential importance in the development of therapeutic agents against neurodegenerative disorders and nerve injury has led to a flurry of activity towards understanding their structure, function and signalling mechanisms. Approaches to develop pharmacological agents that target neurotrophic factors, their receptors or neurotrophic factors signalling pathways have been attempted. This review focuses on some of the major themes and lines of mechanistic and therapeutic advances in this fast-moving field of neuroscience.
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Affiliation(s)
- Z Y Chen
- Department of Neurobiology, the Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China.
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Wen Z, Yao W, Xie L, Yan ZY, Chen K, Ka W, Sun D. Influence of neuraminidase on the characteristics of microrheology of red blood cells. Clin Hemorheol Microcirc 2001; 23:51-7. [PMID: 11214713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Surface charge was removed from RBC (erythrocyte) membrane to different degrees with biochemical methods, i.e., treatment of RBCs with neuraminidase, either using different doses for the same incubation time (1 hour) or using the same dose (75 milli-unit) for different incubation time. Several rheological properties of the RBCs with surface charge removal were observed, including the deformation index DI (using traditional ektacytometry) orientation index (DI)or and small deformation index (Dl)d (using new ektacytometry), the viscosity at low and high shear rates (using a cone-plate rotating viscosimeter). In addition, photographs of RBCs aggregation under a microscope and the histograms of RBC aggregate size after treatment with neuraminidase were obtained. It is found from these experiments that the decrease of the surface charge of RBCs leads to the decrease in the deformation and orientation indices as well as the increase in blood viscosity.
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Affiliation(s)
- Z Wen
- Hemorheology Center, Department of Medical Physics, Beijing Medical University, PR China.
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Wen Z, Xie J, Guan Z, Sun D, Yao W, Chen K, Yan ZY, Mu Q. A study of hemorheological behaviour for patients with Alzheimer's disease at the early stages. Clin Hemorheol Microcirc 2001; 22:261-6. [PMID: 11081463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
To evaluate the change of hemorheological indexes for patients with Alzheimer's disease (AD) at the early stages and to discuss effects of these changes on AD, high shear value of whole blood viscosity (etabh), reduced high shear value of whole blood viscosity (retabh), low shear value of whole blood viscosity (etabl), reduced low shear, value of whole blood viscosity (retabl), KT value of whole blood viscosity, hematocrit (HCT) and blood plasma viscosity (etaP) were measured in 31 patients with probable AD at the early stages and 33 age-matched healthy subjects. There were significant differences of all hemorheological indexes between AD group and control group except HCT. Step discriminant analysis revealed 81.25% of overall group-classified accuracy in a hemorheological discriminant function consisting of etabl, retabl, retabh and HCT. Significant difference of hemorheological indexes existed between AD and age-matched healthy control subjects. The results showed that measurement of hemorheological indexes could be used as one of reference standards of diagnosis in AD.
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Affiliation(s)
- Z Wen
- Department of Medical Physics, Beijing Medical University, PR China.
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Nie X, Wen ZY, Yan ZY, Huang L, Sun D, Cheng B. Effects of morphine on rheological properties of rat red blood cells. Clin Hemorheol Microcirc 2001; 22:189-95. [PMID: 10976712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
To evaluate the effect of morphine on red blood cells, in vivo and in vitro rat models of morphine dependence were established. Rheological properties of rat red cells were measured by ektacytometry; the biophysical changes in the membrane of rat red cells were measured by the Fourier-Transformed Infrared technique (FT-IR) and the fluorescence depolarization method. The results show that the membrane fluidity of red cells was greatly reduced by morphine and the secondary structure of membrane proteins was changed. This suggests that morphine affects the rat red cell membrane directly, rather than through opioids-receptors.
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Affiliation(s)
- X Nie
- Department of Biophysics, Beijing Medical University, China
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Wang ZJ, Ellis I, Zauber P, Iwama T, Marchese C, Talbot I, Xue WH, Yan ZY, Tomlinson I. Allelic imbalance at the LKB1 (STK11) locus in tumours from patients with Peutz-Jeghers' syndrome provides evidence for a hamartoma-(adenoma)-carcinoma sequence. J Pathol 2000. [PMID: 10398133 DOI: 10.1002/(sici)1096-9896(199905)188:1%3c9::aid-path326%3e3.0.co;2-e] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Patients with Peutz-Jeghers' syndrome (PJS) develop hamartomatous gastrointestinal polyps and characteristic pigmentation, as a result of germline mutations in the LKB1 gene. The hamartomas in PJS were long considered to be without malignant potential. There is, however, accumulating epidemiological evidence to suggest that PJS predisposes to cancers at several different sites (colon, pancreas, breast, ovary, testis, and cervix), although large enough patient samples are rarely available to prove this. Allelic imbalance [allele loss, loss of heterozygosity (LOH)] has previously been reported in a small number of PJS polyps, suggesting that LKB1 acts as a tumour suppressor in these tumours. This study confirms allelic loss at LKB1 in PJS polyps and shows that LOH also occurs in cancers of the colon, breast, and cervix in PJS patients. Allele loss was additionally found in a colonic adenoma from a PJS patient, strongly suggesting the existence of a hamartoma-(adenoma)-carcinoma sequence in tumourigenesis. These results provide molecular evidence that PJS patients are predisposed to cancers at several sites, as a direct result of selection for loss of the 'wild-type' LKB1 allele in tumours. Given the rare involvement of LKB1 in sporadic cancers, these data also suggest that the indirect effect on cancer risk (or 'bystander effect') proposed for hamartomas in juvenile polyposis does not apply to carcinomas in PJS.
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Affiliation(s)
- Z J Wang
- Tumour Genetics Group, Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, U.K
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Wang ZJ, Churchman M, Avizienyte E, McKeown C, Davies S, Evans DG, Ferguson A, Ellis I, Xu WH, Yan ZY, Aaltonen LA, Tomlinson IP. Germline mutations of the LKB1 (STK11) gene in Peutz-Jeghers patients. J Med Genet 1999; 36:365-8. [PMID: 10353780 PMCID: PMC1734361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Germline mutations of the LKB1 (STK11) serine/threonine kinase gene (chromosome 19p13.3) cause Peutz-Jeghers syndrome, which is characterised by hamartomas of the gastrointestinal tract and typical pigmentation. Peutz-Jeghers syndrome carries an overall risk of cancer that may be up to 20 times that of the general population. Here, we report the results of a screen for germline LKB1 mutations by DNA sequencing in 12 Peutz-Jeghers patients (three sporadic and nine familial cases). Mutations were found in seven (58%) cases, in exons 1, 2, 4, 6, and 9. Five of these mutations, two of which are identical, are predicted to lead to a truncated protein (three frameshifts, two nonsense changes). A further mutation is an in frame deletion of 6 bp, resulting in a deletion of lysine and asparagine; the second of these amino acids is conserved between species. The seventh mutation is a missense change in exon 2, converting lysine to arginine, affecting non-conserved amino acids and of uncertain functional significance. Despite the fact that Peutz-Jeghers syndrome is usually an early onset disease with characteristic clinical features, predictive and diagnostic testing for LKB1 mutations will be useful for selected patients in both familial and non-familial contexts.
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Affiliation(s)
- Z J Wang
- Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, UK
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Wang ZJ, Ellis I, Zauber P, Iwama T, Marchese C, Talbot I, Xue WH, Yan ZY, Tomlinson I. Allelic imbalance at the LKB1 (STK11) locus in tumours from patients with Peutz-Jeghers' syndrome provides evidence for a hamartoma-(adenoma)-carcinoma sequence. J Pathol 1999; 188:9-13. [PMID: 10398133 DOI: 10.1002/(sici)1096-9896(199905)188:1<9::aid-path326>3.0.co;2-e] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Patients with Peutz-Jeghers' syndrome (PJS) develop hamartomatous gastrointestinal polyps and characteristic pigmentation, as a result of germline mutations in the LKB1 gene. The hamartomas in PJS were long considered to be without malignant potential. There is, however, accumulating epidemiological evidence to suggest that PJS predisposes to cancers at several different sites (colon, pancreas, breast, ovary, testis, and cervix), although large enough patient samples are rarely available to prove this. Allelic imbalance [allele loss, loss of heterozygosity (LOH)] has previously been reported in a small number of PJS polyps, suggesting that LKB1 acts as a tumour suppressor in these tumours. This study confirms allelic loss at LKB1 in PJS polyps and shows that LOH also occurs in cancers of the colon, breast, and cervix in PJS patients. Allele loss was additionally found in a colonic adenoma from a PJS patient, strongly suggesting the existence of a hamartoma-(adenoma)-carcinoma sequence in tumourigenesis. These results provide molecular evidence that PJS patients are predisposed to cancers at several sites, as a direct result of selection for loss of the 'wild-type' LKB1 allele in tumours. Given the rare involvement of LKB1 in sporadic cancers, these data also suggest that the indirect effect on cancer risk (or 'bystander effect') proposed for hamartomas in juvenile polyposis does not apply to carcinomas in PJS.
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Affiliation(s)
- Z J Wang
- Tumour Genetics Group, Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, U.K
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Wang ZJ, Churchman M, Campbell IG, Xu WH, Yan ZY, McCluggage WG, Foulkes WD, Tomlinson IP. Allele loss and mutation screen at the Peutz-Jeghers (LKB1) locus (19p13.3) in sporadic ovarian tumours. Br J Cancer 1999; 80:70-2. [PMID: 10389980 PMCID: PMC2363028 DOI: 10.1038/sj.bjc.6690323] [Citation(s) in RCA: 62] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Germline mutations in the LKB1 (STK11) gene (chromosome sub-band 19p13.3) cause characteristic hamartomas and pigmentation to develop in patients with Peutz-Jeghers syndrome. Peutz-Jeghers syndrome carries an overall risk of cancer that may be up to 20 times that of the general population and Peutz-Jeghers patients are at increased risk of benign and malignant ovarian tumours, particularly granulosa cell tumours. Loss of heterozygosity (allele loss, LOH) has been reported in about 50% of ovarian cancers on 19p13.3. LKB1 is therefore a candidate tumour suppressor gene for sporadic ovarian tumours. We found allele loss at the marker D19S886 (19p13.3) in 12 of 49 (24%) sporadic ovarian adenocarcinomas. Using SSCP analysis, we screened ten ovarian cancers with LOH, 35 other ovarian cancers and 12 granulosa cell tumours of the ovary for somatic mutations in LKB1. No variants were detected in any of the adenocarcinomas. Two mutations were detected in one of the granulosa cell tumours: a mis-sense mutation affecting the putative 'start' codon (ATG --> ACG, M1T); and a silent change in exon 7 (CTT --> CTA, leucine). Like BRCA1 and BRCA2, therefore, it appears that LKB1 mutations can cause ovarian tumours when present in the germline, but occur rarely in the soma. The allele loss on 19p13.3 in ovarian cancers almost certainly targets a different gene from LKB1.
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Affiliation(s)
- Z J Wang
- Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, UK
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37
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Wen ZY, Song LC, Yan ZY, Lu ZH, Sun DG, Shi Y, Chien S. An animal model to study erythrocyte senescence with a narrow time window of erythrocyte production: alterations in osmotic fragility and deformability of erythrocytes during their life span. Clin Hemorheol Microcirc 1998; 19:299-306. [PMID: 9972667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Using the model in which the entire RBC population was nearly synchronously produced following the induction of spherocytic anemia in the rabbit with antibody serum, we determined the changes of RBC osmotic fragility and deformability with aging. The results showed that the osmotic fragility increased with the RBC aging process in a nonlinear manner, being much more profound in the later part of the RBC life span. The RBC deformation index (DI) was measured by an ektacytometry. It is found that the DI decreased with RBC aging in a nonlinear fashion, with increasingly greater changes in the later part of the RBC life span. The alterations of RBC mechanical properties with aging may be attributable to a number of factors, including changes of RBC size and shape, and the viscoelasticity of the cytoplasm and membrane.
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Affiliation(s)
- Z Y Wen
- Hemorheology Center, Department of Medical Physics, Beijing Medical University, PR China.
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38
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Wen ZY, Song LC, Yan ZY, Lu ZG, Sun D, Chien S. An animal model to study erythrocyte senescence with a narrow time window of erythrocyte production. Clin Hemorheol Microcirc 1998; 18:75-84. [PMID: 9653589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Using the method of inducing spherocytic anemia in the rabbit with antibody serum, we have developed an animal model in which red blood cells (RBCs) can nearly grow synchronously. With this model, we determined that the surface charge density on the RBC membrane decreased with cell aging. The change was not linear, being much more profound in the latter half of RBC life span. There was a positive correlation between the mean RBC density and its "age" (r = 0.847, p < 0.01). However, the density distribution of the RBCs at the same "age" showed a broad range, and the density values for RBC groups with different ages showed considerable overlap. This indicates that the density gradient technique can be used to separate RBC population into fractions with different mean ages, but has a low resolving power for obtaining individual RBCs of a given "age".
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Affiliation(s)
- Z Y Wen
- Department of Medical Physics, Beijing Medical University, P. R. China.
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Wen ZY, Yan ZY, Gao T, Dou H, Lu J, Sun D, Lu Z. A study of effects of WGA and ConA on RBC membrane receptors using a new ektacytometric method. Clin Hemorheol Microcirc 1997; 17:467-78. [PMID: 9502531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
With a new ektacytometry, we studied the relation between the microstructure of red blood cell (RBC) membrane and the rheological properties of RBCs in a shear flow field of low viscosity. The main contributions of this paper are as follows: 1. The hemorheological meanings of the orientation index (DI)or and the small deformation index (DI)d were explored. (DI)or is an overall rheological index depending on the deformability and morphology of RBCs. The better the physiological shape of RBCs is maintained, the greater the (DI)or is. (DI)d can be used to describe the lipid fluidity of RBC membrane. Such an explanation for the meaning of (DI)d has been forcefully supported by our experiments using electron spin resonance (ESR) and fluorescence polarization. 2. The influence of wheat germ agglutinin (WGA) of different concentrations on the lipid fluidity of membrane is different from that of concanavalin A (ConA). The lipid fluidity of membrane changes with WGA concentration treating RBCs and there is a maximum value for the membrane fluidity at a specific concentration of WGA. However, the deformability of membrane described by the integrate deformation index (IDI) monotonically decreased with the increase in WGA concentration treating RBCs. 3. It is concluded that the increase in the lipid fluidity of red cell membrane is not necessarily associated with the improvement of RBC deformability.
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Affiliation(s)
- Z Y Wen
- Department of Medical Physics, Beijing Medical University, China.
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Zhou Y, Wan XY, Wang HL, Yan ZY, Hou YD, Jin DY. Bacterial scavengase p20 is structurally and functionally related to peroxiredoxins. Biochem Biophys Res Commun 1997; 233:848-52. [PMID: 9168946 DOI: 10.1006/bbrc.1997.6564] [Citation(s) in RCA: 38] [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] [Indexed: 02/04/2023]
Abstract
Scavengase p20 was recently identified as a novel family of bacterial antioxidant enzymes possessing thioredoxin-linked thiol peroxidase activity. In this study, the Escherichia coli gene coding for scavengase p20 was isolated from three different strains and the nucleotide sequence was determined. Multiple alignment of amino acid sequence revealed that a previously unidentified Cys-61 is most conserved among all bacterial p20 scavengases and corresponds to the active site in the well-characterized peroxiredoxins. Phylogenetic analysis further supported that scavengase p20 is a novel subfamily of peroxiredoxins. Site-directed mutagenesis studies demonstrated that Cys-61 is indispensable for the antioxidant activities of scavengase p20. Taken together, our findings strongly suggest that the p20 scavengases are structurally and functionally related to peroxiredoxins.
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Affiliation(s)
- Y Zhou
- National Key Laboratory of Molecular Biology and Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing, People's Republic of China
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42
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Abstract
A novel antioxidant enzyme designated scavengase p20 was identified in various pathogenic bacteria through database searching for sequences strikingly homologous to a recently discovered Escherichia coli thiol peroxidase p20. The direct biochemical evidence for the existence of scavengase p20 in Haemophilus influenzae, Streptococcus pneumoniae and Helicobacter pylori was provided by protein microsequencing and by in vitro assays for antioxidant activities. Overlapping genes encoding scavengase p20 and superoxide dismutase were recognized in H. pylori and their functional implications are discussed.
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Affiliation(s)
- X Y Wan
- National Key Laboratory of Molecular Biology and Genetic Engineering, Chinese Academy of Preventive Medicine, Beijing
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Abstract
Tissue damage in ischemia/reperfusion injury may be mediated by oxidative stress caused by reactive oxidant species. Since such reactive species are difficult to measure directly, changes in antioxidant concentrations are often used as an indication of oxidative stress. In this study, microdialysis membranes were inserted into the livers of anesthetized rats to determine the effects of ischemia/reperfusion on the extra-cellular concentrations of two antioxidants, uric acid and ascorbic acid. Total hepatic ischemia was induced for 30 min by clamping the portal triad and was followed by 60 min of reperfusion. Uric acid and ascorbic acid concentrations were measured in microdialysis perfusates by high-performance liquid chromatography with electrochemical detection. Initial uric acid and ascorbic acid concentrations were high after insertion of membranes into the liver and decreased rapidly within 90 min (P < 0.001; ANOVA with repeated measures). Uric acid concentrations increased over 300% after ischemia and by 600% during the first 30 min of reperfusion (n = 8; P < 0.05). Ascorbic acid concentrations were 60% higher than controls after ischemia and 90% higher during the first 30 min of reperfusion (n = 8; P < 0.05). Alterations in concentrations of these redox-active molecules may be associated with oxidative stress in liver extracellular fluid during ischemia/reperfusion.
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Affiliation(s)
- M E Layton
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City 66160, USA
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Abstract
We previously observed that endothelin-1 (ET-1)-induced gastric vasoconstriction is enhanced after ischemia-reperfusion. The purpose of our present study was to examine the role of nitric oxide in regulating ET-1-induced vasoconstriction under normal conditions and after ischemia-reperfusion. Using a mechanically perfused stomach segment from chloralose-anesthetized dogs, we examined 1) responses to NG-nitro-L-arginine methyl ester (L-NAME) alone and in combination with L-arginine, 2) whether L-NAME affects ET-1-induced vasoconstriction under normal conditions and after ischemia-reperfusion, and 3) if spermine NONOate {1,3-propanediamine-N-[4-1-(3-aminopropyl)-2-hydroxy-2-nitrosohydrazi no] butyl; a nitric oxide donor} attenuates the augmented response to ET-1 after ischemia-reperfusion. Our results show that 1) L-NAME significantly increased baseline vascular resistance and this response was reduced by L-arginine, 2) ET-1-induced vasoconstriction was enhanced by L-NAME, and 3) administration of spermine NONOate during reperfusion largely attenuated the vasoconstrictor response to ET-1 after ischemia-reperfusion. Our findings are consistent with the hypothesis that nitric oxide modulates responses to ET-1 under normal conditions, and loss of this vasodilator after ischemia-reperfusion results in an augmented response to ET-1.
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Affiliation(s)
- J G Wood
- Department of Surgery, University of Kansas Medical Center, Kansas City 66160, USA
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Abstract
The rheological and functional properties of food components are related to their molecular structure, morphology, and atomic mobilities. NMR provides a powerful tool for elucidating chemical structures, molecular conformations, and interactions of components in food systems. Quantitative analysis of sugars, fats, and other principal compounds in complex food systems was achieved by high-resolution liquid NMR. In addition to information available from liquid experiments, solids NMR experiments can reveal differences and changes in crystal packing of structures in food model systems. Interpretation of experimental results is enhanced by molecular modeling of key food compounds. Models for fat crystallization are carried out to enhance understanding of the molecular structures involved in the fat crystallization process. Recently, MRI has also shown significant impact on food science and technology. Some examples of NMR applications are given in this presentation.
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Affiliation(s)
- Z Y Yan
- Nabisco, Inc., East Hanover, NJ 07936, USA
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Hong SW, Yan ZY, Otterburn MS, McCarthy MJ. Magnetic resonance imaging (MRI) of a cookie in comparison with time-lapse photographic analysis (TLPA) during baking process. Magn Reson Imaging 1996; 14:923-7. [PMID: 8970111 DOI: 10.1016/s0730-725x(96)00183-x] [Citation(s) in RCA: 10] [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] [Indexed: 02/03/2023]
Abstract
Magnetic Resonance Imaging (MRI) has been used to study the baking of a cookie. The structural and dynamic changes occurring during baking have been monitored, including changes in the internal moisture saturations and distribution. The images reveal the moisture distribution is initially uniform, and during baking a gradient in moisture develops from the interior to the edge. Changes in physical dimensions calculated from the data are consistent with those obtained from time-lapsed photography.
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Affiliation(s)
- S W Hong
- Department of Chemical Engineering and Material Science, University of California, Davis 95616-8598, USA
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47
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Abstract
The purpose of our study was to 1) examine the effect of ischemia-reperfusion on gastric vascular resistance and motility, 2) determine whether endothelin-1 (ET-1)-induced vasoconstriction is enhanced after ischemia-reperfusion, and 3) assess the effect of superoxide dismutase (SOD) on these ischemia-reperfusion-induced alterations. These experiments used a mechanically perfused ex vivo gastric segment of chloralose-anesthetized dogs. We first evaluated the effect of varying the duration of total ischemia on reperfusion-induced changes in gastric vascular resistance and motility. In other experiments, responses to ET-1 (10(-10) M) were compared before and after 30-min ischemia and 30-min reperfusion, with saline or SOD (10 U/ml) infused intra-arterially to the stomach during reperfusion. Our results show that 1) after ischemia, vasodilation is seen initially on reperfusion followed by a slowly developing, progressive increase in vascular resistance, 2) the force of gastric contractions was reduced during ischemia but elevated immediately on reperfusion, 3) vasoconstrictor responses to ET-1 are enhanced after ischemia-reperfusion, and 4) SOD reduced the enhanced response to ET-1 and force of contractions. Our findings support the hypothesis that reactive oxygen metabolites contribute to augmented vascular reactivity and hypercontractility after ischemia-reperfusion.
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Affiliation(s)
- J G Wood
- Department of Surgery, University of Kansas Medical Center, Kansas City 66160, USA
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Abstract
The purpose of our study was to examine the role of prostaglandins in angiotensin II (ANG II)-induced gastric vasoconstriction. ANG II produced statistically significant, dose-related increases in vascular resistance of a mechanically perfused ex vivo stomach segment of chloralose-anesthetized dogs. We next examined the effect of cyclooxygenase inhibitors on responses to ANG II. Indomethacin (10 mg/kg), which blocked the vasodilator response to intra-arterial arachidonic acid, augmented the maximal increase in perfusion pressure during ANG II infusion. Similar results were found using a different cyclooxygenase inhibitor, meclofenamic acid. In the final experiments we used an enzyme immunoassay to measure 6-ketoprostaglandin F1 alpha (6-keto-PGF1 alpha) plasma concentrations. ANG II produced dose-related increases in gastric venous but not arterial levels of 6-keto-PGF1 alpha, the major metabolite of prostacyclin. Our results are consistent with the hypothesis that release of vasodilatory prostaglandins attenuates the vasoconstrictor response to ANG II in the gastric microcirculation.
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Affiliation(s)
- J G Wood
- Department of Surgery, University of Kansas Medical Center, Kansas City 66160
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Wood JG, Yan ZY, Davis JM, Cheung LY. Phosphoramidon attenuates big endothelin-1-induced vasoconstriction in canine stomach. Am J Physiol 1994; 266:G311-7. [PMID: 8141304 DOI: 10.1152/ajpgi.1994.266.2.g311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We compared the effects of endothelin-1 and its precursor, big endothelin-1, on vascular resistance of a blood-perfused ex vivo stomach segment of chloralose-anesthetized dogs. In separate groups of dogs, endothelin-1 or big endothelin-1 was infused intra-arterially directly to the gastric segment. Endothelin-1 caused statistically significant dose-related increases in gastric vascular resistance at final blood concentrations of 0.15-10 nM. Although each dose was given for only 5 min, endothelin-1 at concentrations > 0.6 nM caused sustained responses with vascular resistance remaining above control values for approximately 45-90 min. In contrast, however, big endothelin-1 caused a small but statistically significant vasoconstriction only at the highest concentration (10 nM). In other experiments, using 15-min peptide infusions, we found that pretreatment with phosphoramidon, an inhibitor of endothelin-converting enzyme, markedly reduced response to big endothelin-1 but not to endothelin-1. Our results demonstrate that endothelin-1, but not big endothelin-1, is a potent vasoconstrictor of the canine gastric microcirculation. In addition, it appears that big endothelin-1 is degraded to endothelin-1 in the stomach by a phosphoramidon-sensitive metalloproteinase.
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Affiliation(s)
- J G Wood
- Department of Surgery, University of Kansas Medical Center, Kansas City 66160
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Guo YJ, Tan Z, Hong BL, Liu F, Wu GY, Yan ZY. [Quality control of xiaoqinglong mixture]. Zhongguo Zhong Yao Za Zhi 1994; 19:28-9, 62. [PMID: 8011119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
TLC was used to detect ephedrine, paeoniflorin, glycyrrhizic acid, cinnamic aldehyde and xixin volatile oils in Xiaoqinglong mixture. Paeoniflorin was determined by HPLC. The average recovery is 99.42%, and RSD 0.23%.
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Affiliation(s)
- Y J Guo
- Department of Chinese Pharmacy, Beijing College of Traditional Chinese Medicine
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