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Chen DQ, Xie Y, Cao LQ, Fleishman JS, Chen Y, Wu T, Yang DH. The role of ABCC10/MRP7 in anti-cancer drug resistance and beyond. Drug Resist Updat 2024; 73:101062. [PMID: 38330827 DOI: 10.1016/j.drup.2024.101062] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/10/2024]
Abstract
Multidrug resistance protein 7 (MRP7), also known as ATP-binding cassette (ABC) transporter subfamily C10 (ABCC10), is an ABC transporter that was first identified in 2001. ABCC10/MRP7 is a 171 kDa protein located on the basolateral membrane of cells. ABCC10/MRP7 consists of three transmembrane domains and two nucleotide binding domains. It mediates multidrug resistance of tumor cells to a variety of anticancer drugs by increasing drug efflux and results in reducing intracellular drug accumulation. The transport substrates of ABCC10/MRP7 include antineoplastic drugs such as taxanes, vinca alkaloids, and epothilone B, as well as endobiotics such as leukotriene C4 (LTC4) and estradiol 17 β-D-glucuronide. A variety of ABCC10/MRP7 inhibitors, including cepharanthine, imatinib, erlotinib, tariquidar, and sildenafil, can reverse ABCC10/MRP7-mediated MDR. Additionally, the presence or absence of ABCC10/MRP7 is also closely related to renal tubular dysfunction, obesity, and other diseases. In this review, we discuss: 1) Structure and functions of ABCC10/MRP7; 2) Known substrates and inhibitors of ABCC10/MRP7 and their potential therapeutic applications in cancer; and 3) Role of ABCC10/MRP7 in non-cancerous diseases.
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Affiliation(s)
- Da-Qian Chen
- Department of Medical Oncology, Shenzhen Longhua District Central Hospital, Shenzhen, Guangdong 518100, China
| | - Yuhao Xie
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Lu-Qi Cao
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA; Institute for Biotechnology, St. John's University, Queens, NY 11439, USA
| | - Joshua S Fleishman
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Yang Chen
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Tiesong Wu
- Department of Pharmacy, Shenzhen Longhua District Central Hospital, Shenzhen, Guangdong 518100, China.
| | - Dong-Hua Yang
- Department of Medical Oncology, Shenzhen Longhua District Central Hospital, Shenzhen, Guangdong 518100, China; New York College of Traditional Chinese Medicine, Mineola, NY 11501, USA.
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Zhu Y, Xia T, Chen DQ, Xiong X, Shi L, Zuo Y, Xiao H, Liu L. Promising role of protein arginine methyltransferases in overcoming anti-cancer drug resistance. Drug Resist Updat 2024; 72:101016. [PMID: 37980859 DOI: 10.1016/j.drup.2023.101016] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/16/2023] [Accepted: 10/30/2023] [Indexed: 11/21/2023]
Abstract
Drug resistance remains a major challenge in cancer treatment, necessitating the development of novel strategies to overcome it. Protein arginine methyltransferases (PRMTs) are enzymes responsible for epigenetic arginine methylation, which regulates various biological and pathological processes, as a result, they are attractive therapeutic targets for overcoming anti-cancer drug resistance. The ongoing development of small molecules targeting PRMTs has resulted in the generation of chemical probes for modulating most PRMTs and facilitated clinical treatment for the most advanced oncology targets, including PRMT1 and PRMT5. In this review, we summarize various mechanisms underlying protein arginine methylation and the roles of specific PRMTs in driving cancer drug resistance. Furthermore, we highlight the potential clinical implications of PRMT inhibitors in decreasing cancer drug resistance. PRMTs promote the formation and maintenance of drug-tolerant cells via several mechanisms, including altered drug efflux transporters, autophagy, DNA damage repair, cancer stem cell-related function, epithelial-mesenchymal transition, and disordered tumor microenvironment. Multiple preclinical and ongoing clinical trials have demonstrated that PRMT inhibitors, particularly PRMT5 inhibitors, can sensitize cancer cells to various anti-cancer drugs, including chemotherapeutic, targeted therapeutic, and immunotherapeutic agents. Combining PRMT inhibitors with existing anti-cancer strategies will be a promising approach for overcoming anti-cancer drug resistance. Furthermore, enhanced knowledge of the complex functions of arginine methylation and PRMTs in drug resistance will guide the future development of PRMT inhibitors and may help identify new clinical indications.
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Affiliation(s)
- Yongxia Zhu
- Department of Pharmacy, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu 610041, China
| | - Tong Xia
- Department of Dermatology, The Affiliated Hospital, Southwest Medical University, Luzhou 646000, China
| | - Da-Qian Chen
- Department of Medicine Oncology, Shenzhen Longhua District Central Hospital, Shenzhen 518110, China
| | - Xia Xiong
- Department of Dermatology, The Affiliated Hospital, Southwest Medical University, Luzhou 646000, China
| | - Lihong Shi
- Department of Pharmacy, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu 610041, China
| | - Yueqi Zuo
- Shaanxi Key Laboratory of Brain Disorders, Institute of Basic Translational Medicine, Xi'an Medical University, Xi'an 710021, China.
| | - Hongtao Xiao
- Department of Pharmacy, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu 610041, China.
| | - Li Liu
- Department of Dermatology, The Affiliated Hospital, Southwest Medical University, Luzhou 646000, China.
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Chen DQ, Jiang YW, Huang F, Wu XL, Ye ZJ, Wu Y, Lu ZY, Tan J, Feng TJ, Xie X. [Effectiveness of influenza vaccination for school-age children in preventing school absenteeism in Shenzhen: an empirical study]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:1900-1906. [PMID: 34814631 DOI: 10.3760/cma.j.cn112338-20210723-00580] [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: 06/13/2023]
Abstract
Objective: To assess the impact of vaccination at school and influenza vaccination rates among school-age children on school absenteeism in Shenzhen. Methods: The study subjects were primary school students in Shenzhen. School absenteeism panel database from December 2017 to June 2020 of 286 primary schools in Shenzhen was merged with vaccination rates and organizational patterns (i.e., vaccination at school vs. non-school) data of 9 districts in Shenzhen after influenza vaccination for children. The outcome was the number of school absenteeism. The treatment and control groups were distinguished by organizational patterns and district vaccination rates. Difference-in-Difference (DiD) Poisson regressions were used to analyze the effectiveness of vaccination at school and higher vaccination rates. Besides, a robustness test was performed on the regression results. Results: Poisson regression analysis and robustness test of regression results showed that vaccination at school and higher vaccination rates effectively reduced the risk of school absenteeism, with effectiveness against absenteeism of 32.6% (95%CI: 17.0%-45.3%, P<0.01) and 53.0% (95%CI: 42.1%-61.8%, P<0.01), respectively. Conclusion: A free influenza vaccination program for school-age children in Shenzhen and prioritizing school-based vaccination may be an effective measure to reduce the risk of school absenteeism.
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Affiliation(s)
- D Q Chen
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - Y W Jiang
- School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China
| | - F Huang
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
| | - X L Wu
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
| | - Z J Ye
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
| | - Y Wu
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
| | - Z Y Lu
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
| | - J Tan
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
| | - T J Feng
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
| | - X Xie
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China
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Xu JY, Zhou ML, He YH, Chen DQ. [Characteristics and clinical significance of serum D-dimer level before and after delivery in women with advanced maternal age]. Zhonghua Yi Xue Za Zhi 2019; 99:2768-2772. [PMID: 31550800 DOI: 10.3760/cma.j.issn.0376-2491.2019.35.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the characteristics of serum D-dimer level before and after delivery in women with advanced maternal age (VTE), and to assess the value of the characteristics for the diagnosis of venous thromboembolic disease. Methods: The objects were 785 puerperae with advanced maternal age (AMA) who experienced delivery in Women's Hospital, Zhejiang University School of Medicine during 1(st) Jan 2017 to 31(st) Dec 2017, and 327 puerperae with appropriate maternal age as controls were randomly selected from puerperae who gave birth in the same period. Their serum D-dimer levels before and after delivery were evaluated, and AMAs with high-level postnatal serum D-dimer were specially observed for the prognosis. Besides, puerperae complicated with VTE were retrieved from the medical database during 2014-2018, and their clinical characteristics and dynamic variation of serum D-dimer levels were analyzed. Result: The significant difference of D-dimer levels neither before nor after delivery was not observed between AMAs and controls (antenatal: 1.64(1.19, 2.29) mg/L vs 1.53(1.04, 2.23) mg/L, and postnatal: 2.70(1.71, 2.97) mg/L vs 2.63(1.17, 4.13) mg/L, P<0.05 for both; None of AMAs with high-level serum D-dimer after delivery were complicated with VTE, and most of their serum D-dimer levels decreasedsharply with in four postnatal days (the average decrease was 9.2(7.69,12.74) mg/L, and 96.2% of the sepuerperae's decrease was more than 50%). Eight puerperae complicated with VTE were found in the database from 2014 to 2018, among which five were AMAs. The eight puerperae all received a B ultrasound because of the discomfort of lower limbs or abnormal variation of serum D-dimer levels (a slow decrease or an increase trend), so that a diagnosis of VTE was established; besides, the diagnosis or symptoms all emerged in the 3(rd) to 5(th) day after caesarean. Conclusions: The factor of advanced maternal age has little influence on the serum D-dimer level before or after delivery among pregnant women. It is not a single detection for serum D-dimer level, but the intensive monitoring of clinical symptoms and dynamic change of serum D-dimer level, that helps early diagnosis of VTE.
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Affiliation(s)
- J Y Xu
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - M L Zhou
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Y H He
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China; Department of Gynecology and Obstetrics, Tinglin Hospital of Jinshan District, Shanghai 201505, China
| | - D Q Chen
- Department of Obstetrics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
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Ding MY, Hou JJ, Yuan YJ, Bai WF, Lu CH, Xi JH, Ji ZG, Chen DQ. Nd 3+/Yb 3+ cascade-sensitized single-band red upconversion emission in active-core/active-shell nanocrystals. Nanotechnology 2018; 29:345704. [PMID: 29869998 DOI: 10.1088/1361-6528/aaca76] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Lanthanide-doped upconversion nanomaterials (UCNMs) have promoted extensive interest for its biological research and biomedical applications, benefiting from low autofluorescence background, deep light penetration depth, and minimal photo-damage to biological tissues. However, owing to the 980 nm laser-induced overheating issue and the attenuation effect associated with conventional multi-peak emissions, the usage of UCNMs as fluorescent bioprobes is still limited. To address these issues, an effective strategy has been proposed to tune both the excitation and emission peaks of UCNMs into the first biological window (650 ∼ 900 nm), where the light absorption by water and hemoglobin in biological tissues is minimal. Based on the Nd3+/Yb3+ cascade-sensitized upconversion process and efficient exchange-energy transfer between Mn2+ and Er3+ in conjunction with the active-core@active-shell nanostructured design, we have developed a new class of upconversion nanoparticles (UCNPs) that exhibit strong single-band red emission upon excitation of an 808 nm near-infrared laser. Hopefully, the well-designed KMnF3:Yb/Er/Nd@ KMnF3:Yb/Nd core-shell nanocrystals will be considered a promising alternative to conventionally used UCNPs for biolabeling applications without the concern of the overheating issue and the attenuation constraints.
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Affiliation(s)
- M Y Ding
- College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, People's Republic of China. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, People's Republic of China
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Chen DQ, Su YL, Li HP. [A review of severity staging classiffication system for idiopathic pulmonary fibrosis]. Zhonghua Jie He He Hu Xi Za Zhi 2018; 41:355-358. [PMID: 29747279 DOI: 10.3760/cma.j.issn.1001-0939.2018.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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Huang X, Ji KY, Xu J, Shao CH, Wang W, Xu M, Chen DQ, Chen MY, Zhong P. [The surgical management of giant intracranial vestibular schwannoma via retrosigmoid approach: a retrospective review of 657 cases]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 51:401-7. [PMID: 27345873 DOI: 10.3760/cma.j.issn.1673-0860.2016.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To discuss the surgical technique and common complications from the microsurgical treatment of giant intracranial vestibular schwannoma via suboccipital retrosigmoid approach and to propose strategies for minimizing such complications. METHODS Surgical outcomes and complications were evaluated in a consecutive series of 657 unilateral giant vestibular schwannomas treated in Shanghai Huashan Hospital via suboccipital retrosigmoid approach from 1999 to 2014. According to the international classification of vestibular schwannoma, giant tumor means tumor's size over 4 cm in diameter. Clinical status and complications were assessed postoperatively within 14 days and at follow-ups (range, 6-191 months; mean, 59.6 months). RESULTS Follow-up data were available for 566 of the 657 patients (86.1%). The most frequent clinical symptoms were hearing loss in different levels (100%), deafness (36.4%), facial numbness (68.8%). Total tumor resection was achieved in 556 patients (84.6%), subtotal resection in 99 patients (15.1%), and partial resection in 2 patients (0.3%). The common postoperative complications included new deafness (49.6%), intracranial infection (7.6%), low cranial nerve defect (7.5%) and pneumonia (6.2%). The facial nerve was preserved anatomically in 589 cases (89.6%) after operation, and the functional valuation of facial nerve according to postoperative House-Brackmann showed 216 patients (32.9%) in grade Ⅰ-Ⅱ, 308 cases (46.9%) in grade Ⅲ, 133 patients (20.2%) in grade Ⅳ-Ⅵ. Long-term followed-up results showed 428 patients (75.6%) in grade Ⅰ-Ⅲ one year after surgical treatment. CONCLUSIONS Many of these complications are avoidable. Surgical experiences and the clinical anatomy of the approach, accompany with using intraoperative nerve monitoring, preoperatively study the individual imaging and clinical data and multidisciplinary cooperation are the key points to avoid the complications of giant intracranial vestibular schwannoma via suboccipital retrosigmoid approach.
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Affiliation(s)
- X Huang
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - K Y Ji
- Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - J Xu
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - C H Shao
- Department of Psychiatry, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - W Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - M Xu
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - D Q Chen
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - M Y Chen
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - P Zhong
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200040, China
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Wang SF, Chen YH, Chen DQ, Liu ZZ, Xu F, Zeng CH, Hu WX. Mesangial proliferative lupus nephritis with podocytopathy: a special entity of lupus nephritis. Lupus 2017; 27:303-311. [PMID: 28720048 DOI: 10.1177/0961203317720526] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Mesangial proliferative lupus nephritis may coexist with podocytopathy, but its clinical-morphological features, treatment response and outcomes have not been compared with mesangial proliferative lupus nephritis without podocytopathy. In this study, 125 biopsies of lupus nephritis patients showing mesangial proliferation with mesangial immune deposits were collected and divided into podocytopathy group (defined as podocyte foot process effacement (FPE) >50% with nephrotic syndrome (NS)) and mesangial group (FPE ≤50%, or FPE >50% without NS). Mesangial proliferation and tubular- interstitial lesions were semi-quantitatively analyzed. We found that the incidence of renal involvement as the onset symptoms ( P < .001), nephrotic syndrome ( P < .001), acute kidney injury ( P < .001), the degree of acute tubular- interstitial lesions ( P < .001), and renal relapse (51.6% vs. 23.7%, P = .005) were significantly higher in the podocytopathy group than in the mesangial group. In contrast, the incidence of arthritis ( P < .001), fever ( P = .042), low serum C4 ( P = .008) and hematuria ( P = .033) was significantly lower in the podocytopathy group than in the mesangial group. No patients developed end stage renal disease or death during a median follow-up of 64 (interquartile range (IQR) 37-103) months in the podocytopathy group and 53 (IQR 30-83) months in the mesangial group. In conclusion, mesangial proliferative lupus nephritis with and without podocytopathy should be subdivided into two separate classes of lupus nephritis.
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Affiliation(s)
- S F Wang
- National Clinical Research Center of Kidney Diseases, Jinling Hospital. Nanjing University School of Medicine. Nanjing, China
| | - Y H Chen
- National Clinical Research Center of Kidney Diseases, Jinling Hospital. Nanjing University School of Medicine. Nanjing, China
| | - D Q Chen
- National Clinical Research Center of Kidney Diseases, Jinling Hospital. Nanjing University School of Medicine. Nanjing, China
| | - Z Z Liu
- National Clinical Research Center of Kidney Diseases, Jinling Hospital. Nanjing University School of Medicine. Nanjing, China
| | - F Xu
- National Clinical Research Center of Kidney Diseases, Jinling Hospital. Nanjing University School of Medicine. Nanjing, China
| | - C H Zeng
- National Clinical Research Center of Kidney Diseases, Jinling Hospital. Nanjing University School of Medicine. Nanjing, China
| | - W X Hu
- National Clinical Research Center of Kidney Diseases, Jinling Hospital. Nanjing University School of Medicine. Nanjing, China
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Ye YM, Wang FM, Jin C, Zhou LL, Chen DQ. [Hospital costs and related influencing factors in patients with acute poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2016; 34:528-530. [PMID: 27682491 DOI: 10.3760/cma.j.issn.1001-9391.2016.07.013] [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: 06/06/2023]
Abstract
Objective: To investigate the hospital costs and related influencing factors in patients with acute poisoning. Methods: A retrospective analysis was performed for the general status and hospital costs of 373 patients with acute poisoning who were admitted to The Second Affiliated Hospital of Wenzhou Medical College from January 2009 to March 2015. The questionnaires were completed, the data were entered into Excel forms, and SPSS 18.0 was used to perform statistical analysis. Results: Among the 373 patients, 44.8% committed suicide and 31.1% were poisoned by accidental contact; 42.6% were poisoned by pesticides, and 32.7% were poisoned by drugs. After treatment, 64.1% achieved improvements, whereas 1.3% died. The highest hospital cost reached 62 710.26 RMB, and the lowest was 64.64 RMB (median 4 328 RMB) . The patients with an older age and a longer length of hospital stay tended to have higher hospital costs; the patients who underwent catharsis, mechanical ventilation, and blood purification and were admitted to the intensive care unit had relatively high hospital costs. Conclusion: The patients with acute poisoning have high hospital costs. Poisoning caused by pesticides and drugs should be prevented and treated with priority, so as to reduce the heavy economic burden caused by acute poisoning.
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Affiliation(s)
- Y M Ye
- The 2nd Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325027, China
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Zhang R, Wang ZY, Zhu LL, Wu F, Chen DQ, Sun LF, Lu ZQ. Resistin expression in adipose tissues and its effect on glucose metabolism in rats with brain injury. Genet Mol Res 2016; 15:gmr7659. [PMID: 26909974 DOI: 10.4238/gmr.15017659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Resistin (RSTN) expression in subcutaneous adipose tissue, and its effect on glucose metabolism in rats with traumatic brain injury, was investigated using real-time PCR, western blots, and enzyme linked immunoassays. Our results show that the expression of RSTN mRNA (3.192 ± 0.046, 4.016 ± 0.010, 6.004 ± 0.020, 8.213 ± 0.013, 11.199 ± 0.174, 15.094 ± 0.030), protein levels (1.79 ± 0.05, 1.98 ± 0.07, 2.75 ± 0.08, 3.19 ± 0.08, 4.25 ± 0.11, 4.48 ± 0.07), levels of serum insulin (512.96 ± 1.21, 580.57 ± 1.52, 769.71 ± 2.22, 826.08 ± 2.03, 1262.25 ± 3.40, 1512.80 ± 3.93), and fasting blood glucose levels (10.277 ± 0.040, 12.776 ± 0.038, 13.403 ± 0.263, 14.698 ± 0.100, 16.637 ± 0.110, 19.416 ± 0.025) were significantly higher in the traumatic rat group compared to the control group (P < 0. 05). Quantitative insulin sensitivity check index (QUICKI) was significantly lower in the traumatic group (-8.570 ± 0.005, -8.912 ± 0.004, -9.241 ± 0.022, -9.404 ± 0.007, -9.952 ± 0.007, -10.288 ± 0.002) than in the control group (-7.633 ± 0.003, -7.639 ± 0.004, -7.637 ± 0.006, -7.643 ± 0.003, -7.636 ± 0.006, -7.634 ± 0.004) (P < 0.05). Single factor linear correlation analysis showed that there was a significant negative correlation between RSTN expression and QUICKI (-0.983, P < 0.05) in the traumatic group. The increase in RSTN expression in the subcutaneous adipose tissue of rats with traumatic brain injury is likely related to the indexes of glycometabolism, including serum insulin, fasting blood glucose, and QUICKI. Our results lead us to conclude that RSTN may play an important role in the process of insulin resistance in rats with traumatic brain injury.
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Affiliation(s)
- R Zhang
- Department of Emergency, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Z Y Wang
- Department of Emergency, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - L L Zhu
- Department of Emergency, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - F Wu
- Department of Emergency, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - D Q Chen
- Department of Emergency, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - L F Sun
- Department of Emergency, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Z Q Lu
- Department of Emergency, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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Hodaie M, Chen DQ, Quan J. Cortical thickness analysis in trigeminal neuralgia reflects unique changes related to treatment effect. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70301-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Hodaie M, Chen DQ. Functional anisotropy changes in the trigeminal nerve after Radiosurgery for trigeminal neuralgia. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70928-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Critchley LAH, Chen DQ, Lee A, Thomas GN, Tomlinson B. A survey of Chinese herbal medicine intake amongst preoperative patients in Hong Kong. Anaesth Intensive Care 2006; 33:506-13. [PMID: 16119494 DOI: 10.1177/0310057x0503300414] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We have surveyed, by means of a questionnaire, the preoperative use of traditional Chinese medicines in 259 adult Chinese patients admitted to a Hong Kong teaching hospital. The spectrum and use of herbal remedies differed from that reported by Western sources. Of those patients surveyed 90% used Chinese herbs on a regular daily basis in traditional soups and teas while 44% had consulted a traditional Chinese medicine practitioner in the last twelve months prior to admission, but mainly for health promotion (59%) and minor ailments (30%). Only 25% sought advice for their current illness and 13% were taking regular traditional Chinese medicines prior to admission. The ingredients were difficult to identify. Patients with cancer were more likely to use ling zhi (odds ratio 5.4). Female patients with reproductive problems were more likely to visit a traditional Chinese medical practitioner (odds ratio 2.6) and use ginseng (odds ratio 5.1). The anaesthetic implications of preoperative traditional Chinese medicine in keeping with Hong Kong practices need to be investigated, and appropriate anaesthetic guidelines should be developed.
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Affiliation(s)
- L A H Critchley
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
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Abstract
A 37-year-old Hong Kong Chinese female with cervical cancer was scheduled for radical hysterectomy and lymphadenectomy. Her past health was good. Pre-operatively, she was found to have a fatty liver, prolonged prothrombin time and abnormal liver function tests. Surgery was not postponed and she was anaesthetised uneventfully, using a general anaesthetic technique. The procedure lasted 4 h. Postoperatively, she developed a large pelvic haematoma and a wound infection. Her coagulation and liver function tests gradually returned to normal. No obvious medical cause for her liver dysfunction could be found. However, it emerged that she had received a 6-week course of traditional Chinese medicines prior to admission. The prescriptions contained over 60 different ingredients, some of which were known to be hepatotoxic, cytotoxic or to cause bleeding. This was the most likely explanation for her liver dysfunction.
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Affiliation(s)
- L A H Critchley
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China.
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15
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Chen DQ, Kolli BK, Yadava N, Lu HG, Gilman-Sachs A, Peterson DA, Chang KP. Episomal expression of specific sense and antisense mRNAs in Leishmania amazonensis: modulation of gp63 level in promastigotes and their infection of macrophages in vitro. Infect Immun 2000; 68:80-6. [PMID: 10603371 PMCID: PMC97104 DOI: 10.1128/iai.68.1.80-86.2000] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The major surface glycoprotein (gp63) of Leishmania amazonensis is a metalloprotease implicated in the infection of mammalian macrophages. The expression of gp63 and its participation in this infection were further examined by modulating the level of this molecule in a virulent gp63-abundant wild-type clone. Promastigotes were transfected with gp63 genes cloned into a Leishmania-specific vector in two different orientations, leading to the expression of gp63 sense and antisense RNAs. With increasing selective pressure, cell surface gp63 was increasingly augmented in the transfectants with sense transcripts and suppressed to a very low level in those with antisense transcripts. Thus, the expression of gp63 from chromosomal, repetitive genes is not stringently regulated at the protein level and can be substantially reduced by episomal antisense transcription of a single copy. The transfectants differed significantly only in the level of gp63, thereby allowing specific evaluation of this molecule in leishmanial infection of macrophages in vitro. Kinetic studies of infection in vitro indicate that gp63 plays a role not only in the binding of this parasite to these macrophages but also in its intramacrophage survival and replication.
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Affiliation(s)
- D Q Chen
- Department of Microbiology/Immunology, University of Health Sciences/Chicago Medical School, North Chicago, Illinois 60064, USA
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16
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Affiliation(s)
- D Q Chen
- Department of Microbiology and Immunology, University of Health Sciences/Chicago Medical School, North Chicago, IL 60064, USA
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17
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Abstract
The occurrence of a secondary bacterial symbiont (PASS) of pea aphid, Acyrthosiphon pisum (Harris), was detected by polymerase chain reaction (PCR) with specific nucleotide primers based on PASS 16S rDNA nucleotide sequences from over 80% (50/57) of clones of pea aphid collected from widely separated locations in California. PASS was also detected by PCR in both red and green phenotypes of rose aphid,Macrosiphum rosae (L.), but not in six other species of aphids examined, including blue alfalfa aphid (A. kondoi Shinji). The nucleotide sequences of the PCR-amplified, partial 16S rDNAs (1060 bp) from pea aphid and rose aphid were identical and 99.9% similar to the published 16S rDNA of PASS. PASS and a recently described new rickettsia of pea aphid (PAR) were transmitted by needle injection of hemolymph from positive pea aphid clones into negative clones and into blue alfalfa aphids. Both PASS and PAR were maintained in the offspring of some of the injected mother aphids via high rate of maternal transmission.
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Affiliation(s)
- D Q Chen
- Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720-3112, USA
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18
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Abstract
An undescribed, maternally heritable, rod-shaped bacterium (or "tertiary symbiont") was detected by microscopy in hemolymph of about half (59/122) of pea aphid [Acyrthosiphon pisum (Harris)] clones collected from widely separated locations in California. On the basis of molecular phylogenetic analysis of 16S rDNA sequences, the bacterium was clearly placed among other Rickettsia in the alpha-subgroup of Proteobacteria, close to Rickettsia bellii-a rickettsia found in ticks. A PCR assay was developed to detect this bacterium in pea aphid clones with specific 16S rDNA PCR primers. Results of PCR-based assays completely correlated with detection by microscopy. This is the first confirmed detection of a Rickettsia in a herbivorous insect.
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Affiliation(s)
- D Q Chen
- Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720-3112, USA
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19
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Abstract
This paper describes a simple method for obtaining pure populations of human lymphocytes at the first in vitro mitotic division (M-1) by continuous treatment with colchicine or colcemid. When colchicine (7.2 x 10(-8) M) or colcemid (4.8 x 10(-8) M) was added to cultures 0-24 h after initiation, cultures harvested at 54 h had more than 99.9% of mitotic cells in the first metaphase (M-1). We showed that not only more analyzable M-1 cells may be obtained, but staining for sister-chromatid differentiation may be avoided.
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Affiliation(s)
- D Q Chen
- Laboratory of Industrial Hygiene, Ministry of Public Health, Deshengmenwai, Beijing, China
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20
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Pu CS, Cui XM, Chen DQ. [Extracorporeal shock wave lithotripsy in gallbladder stones: report of 200 cases]. Zhonghua Nei Ke Za Zhi 1991; 30:561-3, 595. [PMID: 1806339] [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: 12/28/2022]
Abstract
The effect and experience in treating 200 patients having gallbladder stones with extracorporeal shock wave lithotripsy (ESWL) were reported. Traditional Chinese medicine was used in combination in these patients. The overall effective lithotriptic rate was 91%. In a follow-up study of 137 of the cases, the rate of complete disappearance of gallbladder stones was 16.8%, 25.5% and 39.4%, respectively 1, 3, and 6 months after lithotripsy. During treatment, the patients had no remarkable discomfort. The authors consider that the lithotriptic effect is related to the nature, size, morphology and structure of the stones and ESWL is promising non-operative treatment. However, improved instrumentation is necessary for better efficacy of lithotripsy.
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Affiliation(s)
- C S Pu
- Lanzhow Railway Central Hospital
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21
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Wang H, Chen DQ, Yang Y. [Clinical study on asthma treated with transilast]. Zhonghua Nei Ke Za Zhi 1988; 27:544-7, 587. [PMID: 2465877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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22
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Ai CX, Wen YX, Zhang YG, Wang SS, Qiu QC, Shi ZX, Li DY, Chen DQ, Liu XD, Zhao JH. Clinical manifestations and epidemiological characteristics of Lyme disease in Hailin county, Heilongjiang Province, China. Ann N Y Acad Sci 1988; 539:302-13. [PMID: 3190101 DOI: 10.1111/j.1749-6632.1988.tb31864.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Clinical manifestations and epidemiological characteristics of Lyme disease in Hailin county, Heilongjiang Province, China have been reported. The clinical picture of erythema chronicum migrans (ECM) is variable. ECM in the form of annular erythematous patch is uncommon. It is an extensive and indurated lesion. In some instances, a vesicle or necrosis appears in the center of the lesion. Secondary erythema may present in some patients. The neurologic abnormalities consist of meningitis, facial palsy, and polyneuritis. Cardiac abnormalities are rare. In addition, there were cases with lymphadenosis benigna cutis (LABC), which had heretofore only been reported in Europe. The attack rate of ECM is 8.4%. There was a significant sex difference, and most cases occurred in May and June. All patients had a history of tick bite. The prevalence rates of neurologic abnormalities and arthritis were 4.6% and 6.6%, respectively. Three strains of spirochete that are closely related to Borrelia burgdorferi were isolated from Ixodes persulcatus ticks and facial palsy patients. From the above results it is concluded that a focus of Lyme disease exists in this region.
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Affiliation(s)
- C X Ai
- Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing, China
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23
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Mu GG, Chen DQ, Wang ZQ. Color-image correlation with a multiwavelength Fresnel holographic filter. Opt Lett 1988; 13:434-436. [PMID: 19745923 DOI: 10.1364/ol.13.000434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Theoretical and experimental analyses of color-image pattern recognition using a multiwavelength Fresnel holographic filter (FHF) are presented. The FHF technique permits a greatly relaxed spatial-filter alignment requirement, use of a white-light source, negligible color cross talk, and high diffraction efficiency of the spatial filter.
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24
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Chen DQ. [Co-operative effect of tranilast and nifedipine on inhibition of the release of SRS-A from the guinea-pig lung]. Zhonghua Jie He He Hu Xi Za Zhi 1988; 11:96-7, 128. [PMID: 2461811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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25
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Chen DQ, Marr RB, Lauterbur PC. Reconstruction from NMR data acquired with imaging gradients having arbitrary time dependence. IEEE Trans Med Imaging 1986; 5:162-164. [PMID: 18244002 DOI: 10.1109/tmi.1986.4307765] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
An algebraic reconstruction method for NMR imaging from data acquired with imaging gradients having essentially arbitrary time dependence is presented. With reasonable discretization, an overdetermined linear system is obtained for which there exist simple factorized 1-inverses of the coefficient matrices; a computationally efficient reconstruction scheme then follows. Some numerical simulations are also described.
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