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Li L, Zhou ZH, Ju W, Deng W, Chen LC, Li CS, Xia YH, Ju JH. [Clinical effects of free anterolateral thigh perforator flap pedicled with descending genicular artery in repairing wounds after lower leg limb-sparing surgery]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:450-455. [PMID: 37805754 DOI: 10.3760/cma.j.cn501225-20220725-00308] [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] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
Objective: To explore the clinical effects of free anterolateral thigh perforator flap pedicled with descending genicular artery in repairing wounds after lower leg limb-sparing surgery. Methods: A retrospective observational study was conducted. From January 2019 to June 2021, 12 patients with wounds after lower leg limb-sparing surgery who met the inclusion criteria were admitted to Suzhou Ruihua Orthopedic Hospital, including 6 males and 6 females, aged 17 to 74 years, with original wound area ranging from 17 cm×9 cm to 40 cm×15 cm. Five patients had infection in wounds. The wounds were all repaired by free anterolateral thigh perforator flap from contralateral thigh, with area of 18 cm×10 cm to 37 cm×9 cm. The artery of flap was anastomosed with the descending genicular artery, and the wounds in donor areas were sutured directly. Seven patients were transplanted with split-thickness skin grafts from the contralateral thigh to cover the remaining wounds that can not be covered by flap and the wounds in donor areas were covered with gauze. During the operation, the types of perforating branch carried by flap and the types of arteries and veins in recipient areas were recorded. The survival and occurrence of vascular crisis of flap, the survival of skin graft, the wound healing in donor and recipient areas, and the length of hospital stay after flap transplant surgery were recorded. During follow-up, the color and texture of flap, reinfection in lower leg, and fracture healing were recorded. At the last follow-up, the limb salvage function of patients was evaluated according to the functional evaluation criteria of Chen Zhongwei's amputated limb replantation. Results: The types of perforating branches carried by flaps were as follows: 6 cases of only carrying the descending branch of the lateral circumflex femoral artery, 3 cases of only carrying the oblique branch of the lateral circumflex femoral artery, and 3 cases of carrying the descending branch of the lateral circumflex femoral artery and oblique branch of the lateral circumflex femoral artery after internal pressurization anastomosis. The types of arteries in the recipient area of flap were as follows: one case of main trunk of the descending genicular artery, 8 cases of the saphenous branch of the descending genicular artery, and 3 cases of the articular branch of the descending genicular artery. The types of veins in the recipient area of flap were as follows: 8 cases of one accompanying vein of the descending genicular artery and one branch of the great saphenous vein, and 4 cases of two branches of the great saphenous vein. All the flaps survived without vascular crisis, and all the skin grafts also survived. The wounds in the donor and recipient areas were all healed. The length of hospital stay of patient after flap transplant surgery ranged from 13 to 79 days. During the follow-up of 6 to 23 months, the color and texture of flap were both good, with no infection in lower leg wound. Internal or external fixation were removed after fracture healing in 5 patients, and bone graft internal fixation was performed in 7 patients whose fractures were not healed after surgery and all the incisions healed without infection. At the last follow-up, the limb salvage effect of patients was evaluated as followings: excellent in 7 patients, good in 4 patients, and fair in one patient. Conclusions: Free anterolateral thigh flap pedicled with descending genicular artery can effectively repair the wounds after lower leg limb-sparing surgery and control infection with short length of hospital stay, while not increasing the risk of secondary injury of distal limb vessels. Thus, it can obtain satisfactory limb salvage effect which is worthy of clinical promotion.
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Affiliation(s)
- L Li
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
| | - Z H Zhou
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
| | - W Ju
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
| | - W Deng
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
| | - L C Chen
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
| | - C S Li
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
| | - Y H Xia
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
| | - J H Ju
- Department of Orthopaedics Trauma, Suzhou Ruihua Orthopedic Hospital, Suzhou 215104, China
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Chen LC. [Study on mesentary margin in supply vessel-oriented radical resection of colorectal cancer]. Zhonghua Wei Chang Wai Ke Za Zhi 2022; 25:1029-1032. [PMID: 36396380 DOI: 10.3760/cma.j.cn441530-20220121-00030] [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
The concept of radical surgery has experienced from vascular anatomy guidance, lymph node dissection guidance to en-bloc resection guidance. At present, the mesentery guided surgery has developed to a new level of understanding. There are many classical theories on the understanding of the mesentery, from "the mesentery is a wrapped composite structure" to "the mesentery is an organ" and then to "the generalized mesentery theory", but they do not clearly put forward the boundary mark of the mesentery. On the basis of various membrane anatomy theories at home and abroad, we summarized and defined three boundaries of mesenteric excision in radical resection of colorectal cancer. The lateral boundary of the mesentery is the intestinal resection boundary and its mesentery oriented by supplyvessel, the bottom boundary is the mesentery bed, and the central boundary is the degree of lymph node radical resection. Through the detailed description of the mesentery excision, it is helpful to accurately define the mesenteric margin in different stages of radical resection of tumors.
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Affiliation(s)
- L C Chen
- Department of Gastrointestinal Surgery, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
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Xi JY, Chen YY, Lin X, Dong H, Liang BH, Zhang YQ, Chen LC, Luo A, Qin PZ, Hao Y. [Health-adjusted life expectancy in residents in Guangzhou, 2010-2019]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:1415-1422. [PMID: 36117348 DOI: 10.3760/cma.j.cn112338-20220207-00098] [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: 06/15/2023]
Abstract
Objective: To analyze the spatiotemporal distribution of life expectancy (LE) and health-adjusted life expectancy (HALE) in Guangzhou from 2010 to 2019, and quantize the comprehensive impact of different causes and sequelae on health. Methods: The LE, HALE, and cause-excluded health adjusted life expectancy (CEHALE) were estimated using cause-of-death surveillance datasets from Guangzhou Municipal Center for Disease Control and Prevention from 2010 to 2019 and open data from the Global Burden of Disease Study. Joinpoint log-linear regression model was used to analyze the temporal trend and described spatial distribution. Results: In 2019, the LE in residents in Guangzhou was 82.9 years (80.1 years in men and 85.9 years in women), and the HALE was 75.6 years (74.0 years in men and 77.3 years in women). Compared with the urban fringe, the central urban area had higher LE and HALE, and the differences between LE and HALE were small. The LE and HALE in Guangzhou showed an increasing trend from 2010 to 2019. The LE increased by 2.8 years (AAPC=0.4, 95%CI: 0.3-0.4), with the increase of 2.8 years in men and 2.9 years in women. The HALE increased by 2.4 years (AAPC=0.3, 95%CI: 0.3-0.4), with the increase of 2.5 years in men and 2.2 years in women. The median healthy life lost due to communicable, maternal, neonatal, and nutritional diseases was 6.2 years (AAPC=-4.2, 95%CI: -5.3--3.1), while the median healthy life lost due to non-communicable diseases was 14.7 years (AAPC=1.6, 95%CI: 0.9-2.3), the median healthy life expectancy reduced by injury was 6.3 years (AAPC=-3.5, 95%CI: -4.5--2.6). Musculoskeletal disorders, skin and subcutaneous diseases, cardiovascular diseases, nutritional deficiencies, diabetes and kidney diseases were the top five diseases causing healthy life expectancy loss. Conclusion: The LE and HALE in residents in Guangzhou increased steadily from 2010 to 2019, but the quality of life in the urban fringe was lower than that of the central urban area. Non-communicable diseases were the leading causes of healthy life expectancy loss. Health policies and prevention measures should be developed according to area specific characteristics, and social medical resources should be rationally allocated to key diseases to reduce their disease burden.
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Affiliation(s)
- J Y Xi
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Y Y Chen
- Department of Chronic Non-communicable Disease Control and Prevention, Guangzhou Municipal Center for Disease Control and Prevention, Guangzhou 510440, China
| | - X Lin
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - H Dong
- Department of Chronic Non-communicable Disease Control and Prevention, Guangzhou Municipal Center for Disease Control and Prevention, Guangzhou 510440, China
| | - B H Liang
- Department of Chronic Non-communicable Disease Control and Prevention, Guangzhou Municipal Center for Disease Control and Prevention, Guangzhou 510440, China
| | - Y Q Zhang
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - L C Chen
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - A Luo
- Institute for Infectious Disease Control and Prevention, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - P Z Qin
- Department of Chronic Non-communicable Disease Control and Prevention, Guangzhou Municipal Center for Disease Control and Prevention, Guangzhou 510440, China
| | - Yuantao Hao
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China Peking University Center for Public Health and Epidemic Preparedness & Response, Beijing 100191, China Sun Yat-sen Global Health Institute, Sun Yat-sen University, Guangzhou 510080, China Center for Health Information Research, Sun Yat-sen University, Guangzhou 510080, China
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Wang CC, Chen BK, Chen PH, Chen LC. Hinokitiol induces cell death and inhibits epidermal growth factor-induced cell migration and signaling pathways in human cervical adenocarcinoma. Taiwan J Obstet Gynecol 2021; 59:698-705. [PMID: 32917321 DOI: 10.1016/j.tjog.2020.07.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2020] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE The aim of this study was to examine the antitumor activity of hinokitiol for its clinical application in the treatment of human cervical carcinoma. MATERIALS AND METHODS Cervical carcinoma HeLa cells were treated by different concentrations of hinokitiol. Flow cytometry was used to analyze cell cycle. Senescence-associated β-galactosidase (SA-β-gal) assay was used to identify senescent cells. The effects of hinokitiol on EGF-induced cell migration were determined by wound healing and transwell migration assays. Western blot was used to detect proteins involved in cell cycle progression, apoptosis, autophagy, and EGF-induced signaling pathways. RESULTS Hinokitiol suppressed cell viability in a dose-dependent manner. Flow cytometric analysis indicated that hinokitiol treatment resulted in cell cycle arrest at G1 phase, with reduced number of cells in the G2/M phase. Western blot analysis further demonstrated that hinokitiol treatment increased the levels of p53 and p21, and concomitantly reduced the expression of cell cycle regulatory proteins, including cyclin D and cyclin E. SA-β-gal assay showed that hinokitiol treatment significantly induced β-galactosidase activity. In addition, treatment with hinokitiol increased the accumulation of the autophagy regulators, beclin 1 and microtubule-associated protein 1 light chain 3 (LC3-II), in a dose-dependent manner; however, it did not induce caspase-3 activation and poly ADP ribose polymerase (PARP) cleavage. In addition, epidermal growth factor-induced cell migration and c-Jun N-terminal kinase (JNK) and focal adhesion kinase (FAK) phosphorylation were significantly inhibited by hinokitiol. CONCLUSION Our findings revealed that hinokitiol might serve as a potential therapeutic agent for cervical carcinoma therapy.
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Affiliation(s)
- Chih-Chun Wang
- Department of Otolaryngology, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan, ROC
| | - Ben-Kuen Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Peng-Hsu Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Lei-Chin Chen
- Department of Nutrition, I-Shou University, Kaohsiung, Taiwan, ROC.
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Ding XW, Zheng ZC, Zhao Q, Zhai G, Liang H, Wu X, Zhu ZG, Wang HJ, He QS, He XL, Du YA, Chen LC, Hua YW, Huang CM, Xue YW, Zhou Y, Zhou YB, Wu D, Fang XD, Dai YG, Zhang HW, Cao JQ, Li LP, Chai J, Tao KX, Li GL, Jie ZG, Ge J, Xu ZF, Zhang WB, Li QY, Zhao P, Ma ZQ, Yan ZL, Zheng GL, Yan Y, Tang XL, Zhou X. [A multi-center retrospective study of perioperative chemotherapy for gastric cancer based on real-world data]. Zhonghua Wei Chang Wai Ke Za Zhi 2021; 24:403-412. [PMID: 34000769 DOI: 10.3760/cma.j.cn.441530-20200111-00014] [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 effect of perioperative chemotherapy on the prognosis of gastric cancer patients under real-world condition. Methods: A retrospective cohort study was carried out. Real world data of gastric cancer patients receiving perioperative chemotherapy and surgery + adjuvant chemotherapy in 33 domestic hospitals from January 1, 2014 to January 31, 2016 were collected. Inclusion criteria: (1) gastric adenocarcinoma was confirmed by histopathology, and clinical stage was cT2-4aN0-3M0 (AJCC 8th edition); (2) D2 radical gastric cancer surgery was performed; (3) at least one cycle of neoadjuvant chemotherapy (NAC) was completed; (4) at least 4 cycles of adjuvant chemotherapy (AC) [SOX (S-1+oxaliplatin) or CapeOX (capecitabine + oxaliplatin)] were completed. Exclusion criteria: (1) complicated with other malignant tumors; (2) radiotherapy received; (3) patients with incomplete data. The enrolled patients who received neoadjuvant chemotherapy and adjuvant chemotherapy were included in the perioperative chemotherapy group, and those who received only postoperative adjuvant chemotherapy were included in the surgery + adjuvant chemotherapy group. Propensity score matching (PSM) method was used to control selection bias. The primary outcome were overall survival (OS) and progression-free survival (PFS) after PSM. OS was defined as the time from the first neoadjuvant chemotherapy (operation + adjuvant chemotherapy group: from the date of operation) to the last effective follow-up or death. PFS was defined as the time from the first neoadjuvant chemotherapy (operation + adjuvant chemotherapy group: from the date of operation) to the first imaging diagnosis of tumor progression or death. The Kaplan-Meier method was used to estimate the survival rate, and the Cox proportional hazards model was used to evaluate the independent effect of perioperative chemo therapy on OS and PFS. Results: 2 045 cases were included, including 1 293 cases in the surgery+adjuvant chemotherapy group and 752 cases in the perioperative chemotherapy group. After PSM, 492 pairs were included in the analysis. There were no statistically significant differences in gender, age, body mass index, tumor stage before treatment, and tumor location between the two groups (all P>0.05). Compared with the surgery + adjuvant chemotherapy group, patients in the perioperative chemotherapy group had higher proportion of total gastrectomy (χ(2)=40.526, P<0.001), smaller maximum tumor diameter (t=3.969, P<0.001), less number of metastatic lymph nodes (t=1.343, P<0.001), lower ratio of vessel invasion (χ(2)=11.897, P=0.001) and nerve invasion (χ(2)=12.338, P<0.001). In the perioperative chemotherapy group and surgery + adjuvant chemotherapy group, 24 cases (4.9%) and 17 cases (3.4%) developed postoperative complications, respectively, and no significant difference was found between two groups (χ(2)=0.815, P=0.367). The median OS of the perioperative chemotherapy group was longer than that of the surgery + adjuvant chemotherapy group (65 months vs. 45 months, HR: 0.74, 95% CI: 0.62-0.89, P=0.001); the median PFS of the perioperative chemotherapy group was also longer than that of the surgery+adjuvant chemotherapy group (56 months vs. 36 months, HR=0.72, 95% CI:0.61-0.85, P<0.001). The forest plot results of subgroup analysis showed that both men and women could benefit from perioperative chemotherapy (all P<0.05); patients over 45 years of age (P<0.05) and with normal body mass (P<0.01) could benefit significantly; patients with cTNM stage II and III presented a trend of benefit or could benefit significantly (P<0.05); patients with signet ring cell carcinoma benefited little (P>0.05); tumors in the gastric body and gastric antrum benefited more significantly (P<0.05). Conclusion: Perioperative chemotherapy can improve the prognosis of gastric cancer patients.
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Affiliation(s)
- X W Ding
- Department of Gastric surgery, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer Prevention and Therapy, Tianjin 300060, China
| | - Z C Zheng
- Department of Gastric Surgery, Cancer Hospital of China Medical University (Liaoning Cancer Hospital and Institute), Shenyang 110042, China
| | - Q Zhao
- The Third Department of Surgery, The Fourth Hospital, Hebei Medical University, Shijiazhuang 050011, China
| | - G Zhai
- Department of General Surgery, Shanxi Provincial Tumor Hospital, Taiyuan 030013, China
| | - H Liang
- Department of Gastric surgery, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer Prevention and Therapy, Tianjin 300060, China
| | - X Wu
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
| | - Z G Zhu
- Department of Surgery, Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai 200025, China
| | - H J Wang
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital, Xinjiang Medical University, Urumqi 830011, China
| | - Q S He
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - X L He
- Department of General Surgery, Tangdu Hospital, The Air Force Medical University, Xi'an 710038, China
| | - Y A Du
- Department of Gastric Surgery, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - L C Chen
- Department of Gastrointestinal Surgery, Fujian Provincial Cancer Hospital, Fujian Medical University Cancer Hospital, Fuzhou 350014, China
| | - Y W Hua
- Department of General Surgery, The Affiliated Tumor Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - C M Huang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou 350004, China
| | - Y W Xue
- Department of Gastrointestinal Surgery, Harbin Medical University Cancer Hospital, Harbin 150081, China
| | - Y Zhou
- Department of Gastic Surgery, Afiliated CancerHospital, Fudan University, Shanghai 200030, China
| | - Y B Zhou
- Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - D Wu
- Department of Gastrointestinal Surgery, Second Affiliated Hospital, Zhejiang University, Hangzhou 310009, China
| | - X D Fang
- Department of Gastrointestinal Colorectal And Anal Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Y G Dai
- Department of Gastrointestinal Surgery, Yunnan Cancer Hospital, Kunming 650118, China
| | - H W Zhang
- Diagnosis and Treatment Center of Digestive Disease, Wuxi Mingci cardiovascular Hospital, Wuxi 214101, China
| | - J Q Cao
- Department of Gastrointestinal Surgery, Second Affiliated Hospital, Nanchang University, Nanchang 330006, China
| | - L P Li
- Department of Gastrointestinal Surgery, The Affiliated Provincial Hospital, Shandong First Medical University, Jinan 250021, China
| | - J Chai
- Department of Gastric Surgery, The Affiliated Shandong Tumor Hospital, Shandong University, Jinan 250117, China
| | - K X Tao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - G L Li
- Department of General Surgery, Jinling Hospital/General Hospital of Eastern Theater Command, School of Medicine, Nanjing University, Nanjing 210002, China
| | - Z G Jie
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - J Ge
- Department of Gastrointestinal Surgery Xiangya Hospital of Central South University, Changsha 410008, China
| | - Z F Xu
- Department of General Surgery, The Affiliated Hospital, Shandong Academy of Medical Sciences, Jinan 250031, China
| | - W B Zhang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, China
| | - Q Y Li
- Departerment of Abdominal Surgery, Jiangxi Cancer Hospital, Nanchang 330029, China
| | - P Zhao
- Departerment of Gastrointestinal Surgery, Sichuan Tumor Hospital, Chengdu 610041, China
| | - Z Q Ma
- Department of General Surgery, Peking Uninon Medical College (PUMC) Hospital, Chinese Academy of Medical Sciences (CAMS) and PUMC, Beijing 100730, China
| | - Z L Yan
- Department of Gastrointestinal Surgery, Ningbo First Hospital, Ningbo 315000, China
| | - G L Zheng
- Department of Gastric surgery, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer Prevention and Therapy, Tianjin 300060, China
| | - Y Yan
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
| | - X L Tang
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - X Zhou
- The Third Department of Surgery, The Fourth Hospital, Hebei Medical University, Shijiazhuang 050011, China
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Ye ZS, Zeng Y, Wei SH, Wang Y, Chen S, Lin ZT, Wang ZW, Chen XL, Chen LC. [Safety and short-term efficacy of apatinib combined with oxaliplatin and S-1 in the conversion treatment for gastric cancer with peritoneal metastasis]. Zhonghua Wei Chang Wai Ke Za Zhi 2021; 24:240-247. [PMID: 34645168 DOI: 10.3760/cma.j.cn.441530-20200530-00326] [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 investigate the safety and short-term efficacy of apatinib combined with oxaliplatin and S-1 in the conversion treatment for gastric cancer with different types of peritoneal metastasis. Methods: A prospective study "one arm exploratory clinical study of conversion therapy of apatinib with S-1 and oxaliplatin in the treatment of advanced gastric cancer" (clinical registration ChiCTR-ONC-17010430) from medical record database was retrospectively analyzed. Patients aged 18-70 years with gastric cancer peritoneal metastasis confirmed by histology and laparoscopic exploration, and had not receive radiotherapy, chemotherapy, targeted therapy or immunotherapy before were enrolled. Before operation, the patients received 6 cycles of S-1 (80-120 mg/d, d1-d14) and oxaliplatin (130 mg/m(2), d1), and 5 cycles of apatinib (500 mg/d, d1-d21) conversion regimen. Three weeks after chemotherapy, whether the operation was performed or not depending on re-evaluation and patient preference. The main outcome were adverse reactions, and the secondary outcome were objective remission rate (ORR), disease control rate (DCR), and overall survival (OS) rate. The follow-up period was up to May 2020. Results: A total of 27 patients with gastric cancer peritoneal metastasis were enrolled in this study. There were 13 males and 14 females, with a median age of 58 (30-68) years old. There were 9 cases of P1a, 5 cases of P1b, and 13 cases of P1c. There were 14 cases with 1-5 scores of PCI (peritoneal cancer index), and 13 cases with 6 scores or above. The incidence of adverse reactions was 100%. The most common adverse reactions were hematological events including leucopenia (70.4%, 19/27) and granulocytopenia (74.1%, 20/27). Non-hematological adverse events included fatigue (51.9%, 14/27) and oral mucositis (37.0%, 10/27). One patient was withdrawn due to grade 4 thrombocytopenia. Among 26 patients with feasible efficacy evaluation, 18 (69.2%) achieved partial remission, 3 (11.5%) achieved stable disease, and 5 (19.2%) disease progression. The objective remission rate was 69.2% (18/26) and the disease control rate was 80.8% (21/26). Fourteen patients underwent surgery, including 6 patients undergoing R0 resection with the R0 resection rate of 42.9% (6/14). The postoperative pathological response rate was 64.3% (9/14). The follow-up time was 12-40 months, and the follow-up rate was 100%. The 1-year OS rate was 65.2% and the survival time was (14.0±1.7) months. The 1-year OS rates of P1a/P1b group and P1c group were 81.8% and 42.0% respectively, whose difference was statistically significant (P=0.041). The 1-year OS rates of PCI 1-5 group and PCI ≥6 group were 67.3% and 38.5% respectively, whose difference was statistically significant (P=0.022). Conclusion: In the conversion treatment of gastric cancer peritoneal metastasis, the safety of apatinib combined with oxaliplatin and S-1 is acceptable, and this regimen shows a good short-term survival efficacy in patients with P1a/P1b and PCI of 1-5.
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Affiliation(s)
- Z S Ye
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - Y Zeng
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - S H Wei
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - Y Wang
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - S Chen
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - Z T Lin
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - Z W Wang
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - X L Chen
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
| | - L C Chen
- Department of Gastrointestinal Surgery, Key Laboratory of Tumor Biological Treatment of Fujian Province, Fujian Cancer Hospital & Affiliated Cancer Hospital, Fujian Medical University, Fuzhou 350014, China
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Jou YC, Wang SC, Dia YC, Wang ST, Yu MH, Yang HY, Chen LC, Shen CH, Liu YW. Anti-Cancer Effects and Tumor Marker Role of Glutathione S-Transferase Mu 5 in Human Bladder Cancer. Int J Mol Sci 2021; 22:ijms22063056. [PMID: 33802702 PMCID: PMC8002531 DOI: 10.3390/ijms22063056] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/13/2021] [Accepted: 03/15/2021] [Indexed: 11/16/2022] Open
Abstract
Our previous study demonstrated that the glutathione S-transferase Mu 5 (GSTM5) gene is highly CpG-methylated in bladder cancer cells and that demethylation by 5-aza-dC activates GSTM5 gene expression. The aim of the present study was to investigate the role of GSTM5 in bladder cancer. The levels of GSTM5 gene expression and DNA methylation were analyzed in patients with bladder cancer, and functional studies of GSTM5 were conducted using GSTM5 overexpression in cultured bladder cancer cells. Clinical analysis revealed that the GSTM5 mRNA expression was lower in bladder cancer tissues than in normal tissues and that the level of GSTM5 DNA methylation was higher in bladder cancer tissues than in normal urine pellets. Overexpression of GSTM5 decreased cell proliferation, migration and colony formation capacity. Glutathione (GSH) assay results indicated that cellular GSH concentration was decreased by GSTM5 expression and that GSH supplementation reversed the decrease in proliferation and migration of cells overexpressing GSTM5. By contrast, a GSH synthesis inhibitor significantly decreased 5637 cell GSH levels, survival and migration. Furthermore, GSTM5 overexpression inhibited the adhesion of cells to the extracellular matrix protein fibronectin. To elucidate the effect of GSTM5 on anticancer drugs used to treat bladder cancer, cellular viability was compared between cells with or without GSTM5 overexpression. GSTM5-overexpressed cells showed no significant change in the cytotoxicity of cisplatin or mitomycin C in 5637, RT4 and BFTC 905 cells. Though a degree of resistance to doxorubicin was noted in 5637 cells overexpressing GSTM5, no such resistance was observed in RT4 and BFTC 905 cells. In summary, GSTM5 plays a tumor suppressor role in bladder cancer cells without significantly affecting chemoresistance to cisplatin and mitomycin C, and the cellular GSH levels highlight a key mechanism underlying the cancer inhibition effect of GSTM5. These findings suggest that low gene expression and high DNA methylation levels of GSTM5 may act as tumor markers for bladder cancer.
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Affiliation(s)
- Yeong-Chin Jou
- Department of Urology, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600, Taiwan
- Department of Health and Nutrition Biotechnology, Asian University, Taichung 41354, Taiwan
| | - Shou-Chieh Wang
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan
- Department of Food Science, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan
- Division of Nephrology, Department of Internal Medicine, Kuang Tien General Hospital, Taichung 437, Taiwan
| | - Yuan-Chang Dia
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan
- Department of Pathology, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600, Taiwan
| | - Shou-Tsung Wang
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan
| | - Min-Hua Yu
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan
| | - Hsin-Yi Yang
- Department of Clinical Medicine, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600, Taiwan
| | - Lei-Chin Chen
- Department of Nutrition, I-Shou University, Kaohsiung 82445, Taiwan
| | - Cheng-Huang Shen
- Department of Urology, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600, Taiwan
- Department of Health and Nutrition Biotechnology, Asian University, Taichung 41354, Taiwan
| | - Yi-Wen Liu
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan
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8
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Quon JL, Bala W, Chen LC, Wright J, Kim LH, Han M, Shpanskaya K, Lee EH, Tong E, Iv M, Seekins J, Lungren MP, Braun KRM, Poussaint TY, Laughlin S, Taylor MD, Lober RM, Vogel H, Fisher PG, Grant GA, Ramaswamy V, Vitanza NA, Ho CY, Edwards MSB, Cheshier SH, Yeom KW. Deep Learning for Pediatric Posterior Fossa Tumor Detection and Classification: A Multi-Institutional Study. AJNR Am J Neuroradiol 2020; 41:1718-1725. [PMID: 32816765 PMCID: PMC7583118 DOI: 10.3174/ajnr.a6704] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 05/27/2020] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND PURPOSE Posterior fossa tumors are the most common pediatric brain tumors. MR imaging is key to tumor detection, diagnosis, and therapy guidance. We sought to develop an MR imaging-based deep learning model for posterior fossa tumor detection and tumor pathology classification. MATERIALS AND METHODS The study cohort comprised 617 children (median age, 92 months; 56% males) from 5 pediatric institutions with posterior fossa tumors: diffuse midline glioma of the pons (n = 122), medulloblastoma (n = 272), pilocytic astrocytoma (n = 135), and ependymoma (n = 88). There were 199 controls. Tumor histology served as ground truth except for diffuse midline glioma of the pons, which was primarily diagnosed by MR imaging. A modified ResNeXt-50-32x4d architecture served as the backbone for a multitask classifier model, using T2-weighted MRIs as input to detect the presence of tumor and predict tumor class. Deep learning model performance was compared against that of 4 radiologists. RESULTS Model tumor detection accuracy exceeded an AUROC of 0.99 and was similar to that of 4 radiologists. Model tumor classification accuracy was 92% with an F1 score of 0.80. The model was most accurate at predicting diffuse midline glioma of the pons, followed by pilocytic astrocytoma and medulloblastoma. Ependymoma prediction was the least accurate. Tumor type classification accuracy and F1 score were higher than those of 2 of the 4 radiologists. CONCLUSIONS We present a multi-institutional deep learning model for pediatric posterior fossa tumor detection and classification with the potential to augment and improve the accuracy of radiologic diagnosis.
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Affiliation(s)
- J L Quon
- From the Departments of Neurosurgery (J.L.Q., G.A.G., M.S.B.E.)
| | - W Bala
- Department of Radiology (W.B., J.S., M.P.L., K.W.Y.)
| | | | - J Wright
- Department of Radiology (J.W.), Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - L H Kim
- Stanford University School of Medicine (L.H.K., M.H., K.S.), Stanford, California
| | - M Han
- Stanford University School of Medicine (L.H.K., M.H., K.S.), Stanford, California
| | - K Shpanskaya
- Stanford University School of Medicine (L.H.K., M.H., K.S.), Stanford, California
| | - E H Lee
- Electrical Engineering (E.H.L.)
| | | | | | - J Seekins
- Department of Radiology (W.B., J.S., M.P.L., K.W.Y.)
| | - M P Lungren
- Department of Radiology (W.B., J.S., M.P.L., K.W.Y.)
| | - K R M Braun
- Departments of Clinical Radiology & Imaging Sciences (K.R.M.B., C.Y.H.), Riley Children's Hospital, Indiana University, Indianapolis, Indiana
| | - T Y Poussaint
- Departments of Radiology (T.Y.P.), Boston Children's Hospital, Boston, Massachusetts
| | - S Laughlin
- Departments of diagnostic Imaging (S.L.)
| | | | - R M Lober
- Department of Neurosurgery (R.M.L.), Dayton Children's Hospital, Wright State University Boonshoft School of Medicine, Dayton, Ohio
| | - H Vogel
- and Pathology (H.V.), Stanford University, Stanford, California
| | - P G Fisher
- Division of Child Neurology (P.G.F.), Lucile Packard Children's Hospital, Stanford University, Palo Alto, California
| | - G A Grant
- From the Departments of Neurosurgery (J.L.Q., G.A.G., M.S.B.E.)
| | - V Ramaswamy
- and Haematology/Oncology (V.R.), The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - N A Vitanza
- Division of Pediatric Hematology/Oncology (N.A.V.), Department of Pediatrics, University of Washington, Seattle Children's Hospital, Seattle Washington.,Fred Hutchinson Cancer Research Center (N.A.V.), Seattle, Washington
| | - C Y Ho
- Departments of Clinical Radiology & Imaging Sciences (K.R.M.B., C.Y.H.), Riley Children's Hospital, Indiana University, Indianapolis, Indiana
| | - M S B Edwards
- From the Departments of Neurosurgery (J.L.Q., G.A.G., M.S.B.E.)
| | - S H Cheshier
- Departments of Neurosurgery (S.H.C.), University of Utah School of Medicine, Salt Lake City, Utah
| | - K W Yeom
- Department of Radiology (W.B., J.S., M.P.L., K.W.Y.)
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Chen LC, Alexanderson KA. Sick leave and disability pension before and after breast cancer diagnosis: a Swedish cohort study. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz187.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Most working-aged women are, after diagnosed with breast cancer (BC), on some sickness absence and/or disability pension (SADP). We aimed to explore possible trajectories of their previous and subsequent SADP days and risk factors for consistently high levels of future SADP.
Methods
In a longitudinal cohort study of all 3536 women in Sweden aged 19-64 with a first BC diagnosis in 2010, we calculated their annual SADP net days from two years before to three years after BC diagnosis date. A group-based trajectory model was applied to depict SADP patterns. Logistic regressions were used to calculate odds ratios (OR) with 95% confidence intervals (CI) for having >90 or > 180 SADP days/year in the three postdiagnostic years.
Results
Three trajectories of SADP days/month over the five years were identified: “high” (30% of all)”, “increase only around diagnosis” (61%), and ’constant very high’ (9%). Across the study period, the risk factors associated with constantly high levels of SADP days (>90 or > 180 days/year) were similar. Particularly, factors significantly associated with having annual SADP >90 days during all the three postdiagnostic years were: stage II cancer (OR = 4.59; 95% CI 2.98-7.07), stage III+IV (OR = 26.57; 13.52-52.22), prediagnosis SA 1-30 days (OR = 2.73; 1.30-5.70), prediagnosis SA > 90 days (OR = 24.52; 12.25-49.08), and prediagnosis DP (OR = 659.97; 292.52->999.99).
Conclusions
When diagnosed with BC, SADP increased significantly postdiagnosis, however, decreased with time and the absolute majority had no SADP the third year after BC diagnosis. Advanced cancer stage and previous high SADP were the highest risk factors for later SADP.
Key messages
Most breast cancer survivors’ work capacity (sickness absence (SA) and disability pension (DP) is only affected shortly post-diagnosis. Prior SADP and high cancer stage were strongest risk factors. Register-based information on breast cancer patients and their sickness absence and disability pension before and after diagnosis are useful to identify different types of return-to-work patterns.
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Affiliation(s)
- L C Chen
- Division of Insurance Medicine, Karolinska Institutet, Sweden, Sweden
| | - K A Alexanderson
- Division of Insurance Medicine, Karolinska Institutet, Sweden, Sweden
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10
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Jou YC, Wang SC, Dai YC, Chen SY, Shen CH, Lee YR, Chen LC, Liu YW. Gene expression and DNA methylation regulation of arsenic in mouse bladder tissues and in human urothelial cells. Oncol Rep 2019; 42:1005-1016. [PMID: 31322264 PMCID: PMC6667867 DOI: 10.3892/or.2019.7235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 07/11/2019] [Indexed: 12/12/2022] Open
Abstract
According to a report of the International Agency for Research on Cancer, arsenic and inorganic arsenic compounds are classified into Group 1 carcinogens with regard to human health. Epidemiological studies indicate that arsenic is one of the main risk factors for the development of bladder cancer. In the present study, arsenic-altered gene expression in mouse bladder tissues and in human urothelial cells was compared. In the mouse model, sodium arsenite-induced mouse urothelial hyperplasia and intracellular inclusions were present. Following DNA array analysis, four genes with differential expression were selected for quantitative real-time PCR assay. The genes were the following: Cystathionine β-synthase (CBS), adenosine A1 receptor (ADORA1), metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) and Wnt inhibitory factor 1 (Wif1). The results indicated a significant increase in the levels of Cbs and Adora1. The analysis of the DNA CpG methylation levels of the mouse Cbs and Adora1 genes revealed no significant change. In contrast to these observations, the four genes were further analyzed in the human normal urothelial cell line SV-HUC1. The data indicated that WIF1 gene expression was decreased by sodium arsenite, whereas this was not noted for CBS, MALAT1 and ADORA1. Sodium arsenite decreased mRNA and protein expression levels of the WIF1 gene. In addition, the methylation levels of the WIF1 gene were increased. Sodium arsenite inhibited cell proliferation and promoted cell migration as demonstrated in cell functional assays. The gene status was compared in 8 human urothelial cell lines, and WIF1 mRNA expression levels were determined to be higher, whereas DNA CpG methylation levels were lower in SV-HUC1 cells compared with those noted in the other 7 bladder cancer cell lines. In summary, the data indicated that sodium arsenite decreased WIF1 gene expression and promoted cell migration. The increased methylation levels of WIF1 DNA CpG could be a potential biomarker for bladder cancer.
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Affiliation(s)
- Yeong-Chin Jou
- Department of Urology, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600, Taiwan, R.O.C
| | - Shou-Chieh Wang
- Division of Nephrology, Department of Internal Medicine, Kuang Tien General Hospital, Taichung 437, Taiwan, R.O.C
| | - Yuan-Chang Dai
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan, R.O.C
| | - Shih-Ying Chen
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan, R.O.C
| | - Cheng-Huang Shen
- Department of Urology, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600, Taiwan, R.O.C
| | - Ying-Ray Lee
- Department of Medical Research, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 600, Taiwan, R.O.C
| | - Lei-Chin Chen
- Department of Nutrition, I‑Shou University, Jiaosu, Yanchao, Kaohsiung 82445, Taiwan, R.O.C
| | - Yi-Wen Liu
- Department of Microbiology, Immunology and Biopharmaceuticals, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan, R.O.C
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11
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Wei CT, Chen LC, Hsiang YP, Hung YJ, Chien PH, Pan HL, Chen YJ. Chrysin-induced ERK1/2 Phosphorylation Enhances the Sensitivity of Human Hepatocellular Carcinoma Cells to Sorafenib. Anticancer Res 2019; 39:695-701. [PMID: 30711947 DOI: 10.21873/anticanres.13165] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 12/13/2018] [Accepted: 12/14/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Sorafenib is now standard treatment for advanced hepatocellular carcinoma (HCC). However, therapeutic efficacy is not as good as was predicted. Many efforts are being made to improve HCC sensitivity to sorafenib. Our previous study demonstrated that co-treatment with chrysin enhanced sorafenib sensitivity through inhibition of ATP-binding cassette super-family G member 2 (ABCG2). Whether there is another mechanism other than inhibition of ABCG2 underlying chrysin-mediated synergistic effect is still not completely elucidated. MATERIALS AND METHODS Phosphorylation of extracellular signal-regulated protein kinases 1 and 2 (ERK1/2) was examined by western blot. Cell viability was examined by crystal violet staining. The importance of ERK1/2 phosphorylation was assessed by overexpression and blockage of mitogen-activated protein kinase kinase 1 (MEK1). RESULTS Chrysin induced sustained ERK1/2 phosphorylation of HCC cells in both time- and dose-dependent manners. Overexpression of MEK1 enhanced, whereas blockage of MEK1 led to loss of chrysin-synergized sorafenib effect, through modulating ERK1/2 phosphorylation level. CONCLUSION These results identify another novel mechanism underlying chrysin-mediated synergistic effect on sorafenib activity in HCC cells.
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Affiliation(s)
- Ching-Ting Wei
- School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan, R.O.C.,Division of General Surgery, Department of Surgery, E-Da Hospital, Kaohsiung, Taiwan, R.O.C
| | - Lei-Chin Chen
- Department of Nutrition, I-Shou University, Kaohsiung, Taiwan, R.O.C
| | - Yi-Ping Hsiang
- Department of Pharmacy, E-Da Hospital, Kaohsiung, Taiwan, R.O.C
| | - Yung-Jun Hung
- Department of Pharmacy, E-Da Hospital, Kaohsiung, Taiwan, R.O.C
| | - Pei-Hsuan Chien
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan, R.O.C
| | - Hsiao-Lin Pan
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan, R.O.C
| | - Yun-Ju Chen
- School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan, R.O.C. .,Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan, R.O.C.,Department of Pharmacy, E-Da Cancer Hospital, Kaohsiung, Taiwan, R.O.C
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12
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Chen LC, Xie Q. [Clinical timing and benefit of antiviral treatment for hepatitis C]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:164-169. [PMID: 28482401 DOI: 10.3760/cma.j.issn.1007-3418.2017.03.002] [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
Current treatments for hepatitis C include pegylated interferon-α (Peg-IFNα) and ribavirin (RBV) combination therapy and direct antiviral agents (DAAs). Antiviral treatment can be initiated after 4 to 6 months of clinical observations for patients with acute infections, but should be started as early as possible for those with chronic infections. However, for patients who are ineligible for Peg-IFN and RBV combination therapy and have no unrestricted access to DAAs, it is advised that they wait for the approval of DAAs in China if their medical condition is under control. Though, antiviral therapy should be started immediately if the disease progresses. It has been reported that there are numerous clinical benefits of antiviral treatment for hepatitis C. However, the long-term impact of DAAs treatment including efficacy and safety is limited and remains to be explored.
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Affiliation(s)
- L C Chen
- Department of Infectious Diseases, Rui Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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13
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Wang SC, Wang ST, Liu HT, Wang XY, Wu SC, Chen LC, Liu YW. Trichostatin A induces bladder cancer cell death via intrinsic apoptosis at the early phase and Sp1‑survivin downregulation at the late phase of treatment. Oncol Rep 2017; 38:1587-1596. [PMID: 28713892 DOI: 10.3892/or.2017.5795] [Citation(s) in RCA: 12] [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] [Received: 12/24/2016] [Accepted: 06/27/2017] [Indexed: 11/06/2022] Open
Abstract
Histone deacetylase (HDAC) inhibitors have been widely shown to result in cancer cell death. The present study investigated the mechanisms underlying the antitumor effects of the phytochemical trichostatin A (TSA), a classic pan-HDAC inhibitor, in 5,637 urinary bladder cancer cells. It was found that TSA caused cell cycle arrest at the G2/M and G1 phase accompanied by reduced expression of cyclin D1 and upregulated induction of p21. In addition, TSA induced morphological changes, reduced cell viability and apoptotic cell death in 5,637 cells through caspase-3 activation followed by PARP cleavage. The loss of mitochondrial membrane potential (MMP) indicated that TSA induced apoptosis in 5,637 cells through the intrinsic mitochondrial pathway. TSA significantly suppressed Akt activity at 12 h after treatment, suggesting that the apoptosis in the early phase was mediated by Akt inhibition. In addition, the protein level of transcription factor Sp1 was decreased at 24 h after TSA treatment, which likely led to the downregulation of survivin gene expression, and then contributed to the antitumor activity of TSA. Taken together, the present study delineated that TSA-induced growth inhibition and apoptosis in 5,637 cells was associated with pAKT inhibition and MMP loss at the early phase, followed by downregulation of Sp1 and survivin at the late phase of treatment.
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Affiliation(s)
- Shou-Chieh Wang
- Division of Nephrology, Department of Internal Medicine, Kuang Tien General Hospital, Taichung 433, Taiwan, R.O.C
| | - Shou-Tsung Wang
- Department of Food Science, Immunology and Biopharmaceuticals, National Chiayi University, Chiayi 600, Taiwan, R.O.C
| | - Hung-Te Liu
- Department of Microbiology, Immunology and Biopharmaceuticals, National Chiayi University, Chiayi 600, Taiwan, R.O.C
| | - Xiang-Yu Wang
- Department of Microbiology, Immunology and Biopharmaceuticals, National Chiayi University, Chiayi 600, Taiwan, R.O.C
| | - She-Ching Wu
- Department of Food Science, Immunology and Biopharmaceuticals, National Chiayi University, Chiayi 600, Taiwan, R.O.C
| | - Lei-Chin Chen
- Department of Nutrition, I-Shou University, Jiaosu Village, Yanchao District, Kaohsiung 82445, Taiwan, R.O.C
| | - Yi-Wen Liu
- Department of Microbiology, Immunology and Biopharmaceuticals, National Chiayi University, Chiayi 600, Taiwan, R.O.C
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14
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Chen LC, Ninomiya S, Hiraoka K. Super-atmospheric pressure ionization mass spectrometry and its application to ultrafast online protein digestion analysis. J Mass Spectrom 2016; 51:ii. [PMID: 27270871 DOI: 10.1002/jms.3668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Pressure is a key parameter for an ionization source. In this Special Feature article, Lee Chuin Chen and colleagues review super-atmospheric pressure ionization MS with electrospray, corona-discharge-based chemical ionization, and field desorption. They routinely run their mass spectrometer with ion source pressures ranging from several to several tens of atmospheres. A number of strategies have been used to preserve the high vacuum of the instrument while working with a high-pressure (HP) ion source. A recent prototype uses a booster pump with variable pumping speed added to the first pumping stage of the mass spectrometer to regulate a constant vacuum pressure. Further, a new HP-ESI source allowing rapid (a few seconds) online protein digestion MS is also reported. Dr. Lee Chuin Chen is Associate Professor in the Department of Interdisciplinary Research at the University of Yamanashi (Yamanashi, Japan). His main research interest is the development of novel mass spectrometric methods for in-situ medical diagnosis.
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Tsai YC, Yu ML, El-Shazly M, Beerhues L, Cheng YB, Chen LC, Hwang TL, Chen HF, Chung YM, Hou MF, Wu YC, Chang FR. Alkaloids from Pandanus amaryllifolius: Isolation and Their Plausible Biosynthetic Formation. J Nat Prod 2015; 78:2346-2354. [PMID: 26461164 DOI: 10.1021/acs.jnatprod.5b00252] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Pandanus amaryllifolius Roxb. (Pandanaceae) is used as a flavor and in folk medicine in Southeast Asia. The ethanolic crude extract of the aerial parts of P. amaryllifolius exhibited antioxidant, antibiofilm, and anti-inflammatory activities in previous studies. In the current investigation, the purification of the ethanolic extract yielded nine new compounds, including N-acetylnorpandamarilactonines A (1) and B (2); pandalizines A (3) and B (4); pandanmenyamine (5); pandamarilactones 2 (6) and 3 (7), and 5(E)-pandamarilactonine-32 (8); and pandalactonine (9). The isolated alkaloids, with either a γ-alkylidene-α,β-unsaturated-γ-lactone or γ-alkylidene-α,β-unsaturated-γ-lactam system, can be classified into five skeletons including norpandamarilactonine, indolizinone, pandanamine, pandamarilactone, and pandamarilactonine. A plausible biosynthetic route toward 1-5, 7, and 9 is proposed.
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Affiliation(s)
- Yu-Chi Tsai
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Meng-Lun Yu
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Mohamed El-Shazly
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, Ain-Shams University , Organization of African Unity Street, Abassia, Cairo 11566, Egypt
| | - Ludger Beerhues
- Institut fur Pharmazeutische Biologie, Technische Universitat Braunschweig , Mendelssohnstrasse 1, D-38106 Braunschweig, Germany
| | - Yuan-Bin Cheng
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Lei-Chin Chen
- Department of Nutrition, I-Shou University , Kaohsiung 840, Taiwan
| | - Tsong-Long Hwang
- Graduate Institute of Natural Products, College of Medicine, Chang Gung University , Taoyuan 333, Taiwan
| | - Hui-Fen Chen
- Department of Medical and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807 Taiwan
| | - Yu-Ming Chung
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Ming-Feng Hou
- Cancer Center, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Yang-Chang Wu
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
- Chinese Medicine Research and Development Center, China Medical University Hospital , Taichung 404, Taiwan
- Center for Molecular Medicine, China Medical University Hospital , Taichung 404, Taiwan
- School of Chinese Medicine, College of Chinese Medicine, China Medical University , Taichung 404, Taiwan
| | - Fang-Rong Chang
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
- Cancer Center, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
- Research Center for Natural Product and New Drug, Kaohsiung Medical University , Kaohsiung 807, Taiwan
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University , Kaohsiung 804, Taiwan
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Usmanov DT, Chen LC, Yu Z, Yamabe S, Sakaki S, Hiraoka K. Atmospheric pressure chemical ionization of explosives using alternating current corona discharge ion source. J Mass Spectrom 2015; 50:651-661. [PMID: 26149109 DOI: 10.1002/jms.3552] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 10/28/2014] [Accepted: 11/19/2014] [Indexed: 06/04/2023]
Abstract
The high-sensitive detection of explosives is of great importance for social security and safety. In this work, the ion source for atmospheric pressure chemical ionization/mass spectrometry using alternating current corona discharge was newly designed for the analysis of explosives. An electromolded fine capillary with 115 µm inner diameter and 12 mm long was used for the inlet of the mass spectrometer. The flow rate of air through this capillary was 41 ml/min. Stable corona discharge could be maintained with the position of the discharge needle tip as close as 1 mm to the inlet capillary without causing the arc discharge. Explosives dissolved in 0.5 µl methanol were injected to the ion source. The limits of detection for five explosives with 50 pg or lower were achieved. In the ion/molecule reactions of trinitrotoluene (TNT), the discharge products of NOx (-) (x = 2,3), O3 and HNO3 originating from plasma-excited air were suggested to contribute to the formation of [TNT - H](-) (m/z 226), [TNT - NO](-) (m/z 197) and [TNT - NO + HNO3 ](-) (m/z 260), respectively. Formation processes of these ions were traced by density functional theory calculations. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- D T Usmanov
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
- Institute of Ion-Plasma and Laser Technologies, Dormon Yoli Street 33, Akademgorodok, Tashkent, 100125, Uzbekistan
| | - L C Chen
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
| | - Z Yu
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
- School of Chemical and Life Sciences, Shenyang Normal University, Shenyang, 110034, China
| | - S Yamabe
- Fukui Institute of Fundamental Chemistry, Kyoto University, Takano, Sakyoku, Kyoto, 606-8103, Japan
| | - S Sakaki
- Fukui Institute of Fundamental Chemistry, Kyoto University, Takano, Sakyoku, Kyoto, 606-8103, Japan
| | - K Hiraoka
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
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17
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Chen LC, Chueh TC, Tuan YF, Chen CC, Chien CC, Lee HY, Chen SC. Activation of MAPK pathways and downstream transcription factors in 2-aminobiphenyl-induced apoptosis. Environ Toxicol 2015; 30:205-211. [PMID: 23836369 DOI: 10.1002/tox.21886] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 05/30/2013] [Accepted: 06/09/2013] [Indexed: 06/02/2023]
Abstract
2-Aminobiphenyls (2-ABP) induces oxidative DNA damage and leads to apoptosis. The precise signaling pathways of inducing apoptosis in vitro are still unknown. This study provides insight into the relationship between 2-ABP-induced apoptosis and the activation of MAPK and downstream transcription factors using pharmacological inhibitors of ERK, p38, and JNK pathways. Results showed that 2-ABP induced the activation of ERK and JNK but not p38. The ERK/JNK pathways downstream transcription factors, c-Jun and ATF-2, were also activated by 2-ABP. The inhibitory effects of ERK inhibitor, U0126, on 2-ABP-induced caspase-3 activity were not detected. However, JNK inhibitor, SP600125, significantly attenuated the caspase-3 activity induced by 2-ABP. The expression of the transcription factors c-Jun and ATF-2 were decreased in 2-ABP treated cells in the presence of ERK/JNK inhibitors, suggesting that the expression of ERK/JNK pathways leads to the downstream activation of c-Jun and ATF-2. N-acetylcysteine, an ROS scavenger, inhibited 2-ABP-induced activation of ERK and JNK, the cell death and caspase-3 activity, which suggested that oxidative stress plays a crucial role in apoptosis through activation of caspase-3 in a ROS/JNK-dependent signaling cascade.
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Affiliation(s)
- Lei-Chin Chen
- Department of Nutrition, I-Shou University, Kaohsiung City, 84001, Taiwan
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18
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Amloy S, Karlsson KF, Eriksson MO, Palisaitis J, Persson POÅ, Chen YT, Chen KH, Hsu HC, Hsiao CL, Chen LC, Holtz PO. Excitons and biexcitons in InGaN quantum dot like localization centers. Nanotechnology 2014; 25:495702. [PMID: 25410551 DOI: 10.1088/0957-4484/25/49/495702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Indium segregation in a narrow InGaN single quantum well creates quantum dot (QD) like exciton localization centers. Cross-section transmission electron microscopy reveals varying shapes and lateral sizes in the range ∼1-5 nm of the QD-like features, while scanning near field optical microscopy demonstrates a highly inhomogeneous spatial distribution of optically active individual localization centers. Microphotoluminescence spectroscopy confirms the spectrally inhomogeneous distribution of localization centers, in which the exciton and the biexciton related emissions from single centers of varying geometry could be identified by means of excitation power dependencies. Interestingly, the biexciton binding energy (E(b)xx) was found to vary from center to center, between 3 to -22 meV, in correlation with the exciton emission energy. Negative binding energies are only justified by a three-dimensional quantum confinement, which confirms QD-like properties of the localization centers. The observed energy correlation is proposed to be understood as variations of the lateral extension of the confinement potential, which would yield smaller values of E(b)xx for reduced lateral extension and higher exciton emission energy. The proposed relation between lateral extension and E(b)xx is further supported by the exciton and the biexciton recombination lifetimes of a single QD, which suggest a lateral extension of merely ∼3 nm for a QD with strongly negative E(b)xx = -15.5 meV.
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Affiliation(s)
- S Amloy
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, SE-58183 Linköping, Sweden. Department of Physics, Faculty of Science, Thaksin University, Phattalung 93110, Thailand.
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19
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Mousa R, Chen LC, Cheung KL. An Evidence-Based Model Design to Inform the Cost-Effectiveness Evaluation of Primary Endocrine Therapy And Surgery for Older Women with Primary Breast Cancer. Value Health 2014; 17:A638. [PMID: 27202281 DOI: 10.1016/j.jval.2014.08.2295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- R Mousa
- University of Nottingham, Nottingham, UK
| | - L C Chen
- University of Nottingham, Nottingham, UK
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20
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Affiliation(s)
- J P Pang
- Institute of Botany, Academia Sinica, Taipei, Taiwan, Republic of China
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21
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Chen LC, Wu JC, Tuan YF, Tseng YK, Hseu YC, Chen SC. Molecular mechanisms of 3,3'-dichlorobenzidine-mediated toxicity in HepG2 cells. Environ Mol Mutagen 2014; 55:407-420. [PMID: 24604609 DOI: 10.1002/em.21858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 01/29/2014] [Accepted: 01/29/2014] [Indexed: 06/03/2023]
Abstract
3,3'-Dichlorobenzidine (DCB) (CAS 91-94-1), a synthetic, chlorinated, primary aromatic amine, is typically used as an intermediate in the manufacturing of pigments for printing inks, textiles, paints, and plastics. In this study, we found that DCB could significantly inhibit the cell viability of HepG2 cells in a concentration-dependent manner. Flow cytometry revealed that DCB induced G2/M-phase arrest and apoptosis in HepG2 cells. DCB treatment dramatically induced the dissipation of mitochondrial membrane potential (Δψm ) and enhanced the enzymatic activities of caspase-9 and caspase-3 whilst hardly affecting caspase-8 activity. Furthermore, Western blotting indicated that DCB-induced apoptosis was accompanied by the down-regulation of Bcl-2/Bax ratio. These results suggested that DCB led to cytotoxicity involving activation of mitochondrial-dependent apoptosis through Bax/Bcl-2 pathways in HepG2 cells. Furthermore, HepG2 cells treated with DCB showed significant DNA damage as supported by the concentration-dependent increase in olive tail moments as determined by the comet assay and by concentration- and time-dependent increase in histone H2AX phosphorylation (γ-H2AX). Two-dimensional-difference gel electrophoresis (2D-DIGE), combined with mass spectrometry (MS), was used to unveil the differences in protein expression between cells exposed to 25 µM or 100 µM of DCB for 24 hr and the control cells. Twenty-seven differentially expressed proteins involved in DNA repair, unfolded protein response, metabolism, cell signaling, and apoptosis were identified. Among these, 14-3-3 theta, CGI-46, and heat-shock 70 protein 4 were confirmed using Western blot assay. Taken together, these data suggest that DCB is capable of inducing DNA damage and some cellular stress responses in HepG2 cells, thus eventually leading to cell death by apoptosis.
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MESH Headings
- 3,3'-Dichlorobenzidine/adverse effects
- Apoptosis/drug effects
- Biomarkers, Tumor/metabolism
- Blotting, Western
- Carcinogens/pharmacology
- Carcinoma, Hepatocellular/drug therapy
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Caspase 3/metabolism
- Caspase 8/metabolism
- Caspase 9/metabolism
- Cell Cycle/drug effects
- Cell Proliferation/drug effects
- Electrophoresis, Gel, Two-Dimensional
- Humans
- Liver Neoplasms/drug therapy
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Membrane Potential, Mitochondrial/drug effects
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
- Tumor Cells, Cultured
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Affiliation(s)
- Lei-Chin Chen
- Department of Nutrition, I-Shou University, Kaohsiung City, Taiwan, Republic of China
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22
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Abstract
Background This study evaluated the prescribing trends of four commonly prescribed strong opioids in primary care and explored utilization in non-cancer and cancer users. Methods This cross-sectional study was conducted from 2000 to 2010 using the UK Clinical Practice Research Datalink. Prescriptions of buprenorphine, fentanyl, morphine and oxycodone issued to adult patients were included in this study. Opioid prescriptions issued after patients had cancer medical codes were defined as cancer-related use; otherwise, they were considered non-cancer use. Annual number of prescriptions and patients, defined daily dose (DDD/1000 inhabitants/day) and oral morphine equivalent (OMEQ) dose were measured in repeat cross-sectional estimates. Results In total, there were 2,672,022 prescriptions (87.8% for non-cancer) of strong opioids for 178,692 users (59.9% female, 83.9% non-cancer, mean age 67.1 ± 17.0 years) during the study period. The mean annual (DDD/1000 inhabitants/day) was higher in the non-cancer group than in the cancer group for all four opioids; morphine (0.73 ± 0.28 vs. 0.12 ± 0.04), fentanyl (0.46 ± 0.29 vs. 0.06 ± 0.24), oxycodone (0.24 ± 0.19 vs. 0.038 ± 0.028) and buprenorphine (0.23 ± 0.15 vs. 0.008 ± 0.006). The highest proportion of patients were prescribed low opioid doses (OMEQ ≤ 50 mg/day) in both non-cancer (50.3%) and cancer (39.9%) groups, followed by the dose ranks of 51–100 mg/day (26.2% vs. 28.7%), 101–200 mg/day (15.1% vs. 19.2%) and >200 mg/day (8.25% vs. 12.1%). Conclusions There has been a huge increase in strong opioid prescribing in the United Kingdom, with the majority of prescriptions for non-cancer pain. Morphine was the most frequently prescribed, but the utilization of oxycodone, buprenorphine and fentanyl increased markedly over time.
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Affiliation(s)
- C S Zin
- Division for Social Research in Medicines and Health, The School of Pharmacy, University of Nottingham, East Drive, University Park, UK; Kulliyyah of Pharmacy, International Islamic University Malaysia, Jalan Sultan Ahmad Shah, Indera Mahkota, 25200, Kuantan, Pahang Darul Makmur, Malaysia
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23
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Ko SH, Chiang KL, Kao HW, Chen LC, Ng CJ, Chen PY, Chen JY, Yang WC, Ng YY. Crystallization in transfer set before continuous ambulatory peritoneal dialysis initiation-three case reports. Perit Dial Int 2014; 34:244-5. [PMID: 24676746 DOI: 10.3747/pdi.2012.00344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- S H Ko
- Division of Nephrology1 Department of Medicine2 Department of Teaching3 Taipei Veterans General Hospital National Yang-Ming University School of Medicine Taipei, Taiwan
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24
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Huang WC, Hsieh YL, Hung CM, Chien PH, Chien YF, Chen LC, Tu CY, Chen CH, Hsu SC, Lin YM, Chen YJ. BCRP/ABCG2 inhibition sensitizes hepatocellular carcinoma cells to sorafenib. PLoS One 2013; 8:e83627. [PMID: 24391798 PMCID: PMC3877048 DOI: 10.1371/journal.pone.0083627] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [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: 09/01/2013] [Accepted: 11/05/2013] [Indexed: 01/16/2023] Open
Abstract
The multikinase inhibitor, sorafenib (Nexavar®, BAY43-9006), which inhibits both the Raf/MEK/ERK pathway and several receptor tyrosine kinases (RTKs), has shown significantly therapeutic benefits in advanced hepatocellular carcinoma (HCC). However, not all HCC patients respond to sorafenib well and new therapeutic strategies to optimize the efficacy of sorafenib are urgently required. Overexpression of breast cancer resistance protein (BCRP/ABCG2) mediates the drug-efflux of several tyrosine kinase inhibitors (TKIs) to attenuate their efficacy. This study aimed to investigate the role of BCRP/ABCG2 in the sensitivity of HCC to sorafenib. Our data showed that BCRP/ABCG2 mediated the efflux of sorafenib. Co-treatment with a BCRP/ABCG2 inhibitor greatly augmented the cytotoxicity of sorafenib in HCC cells. Similar results were also achieved by the competitive inhibitor of BCRP/ABCG2, gefitinib, in combination with sorafenib. These results suggest not only that BCRP/ABCG2 is a potential predictor for the sorafenib sensitivity in HCC, but also that blockage of BCRP/ABCG2 may be a potential strategy to increase the response of HCC cells to sorafenib.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily G, Member 2
- ATP-Binding Cassette Transporters/antagonists & inhibitors
- ATP-Binding Cassette Transporters/genetics
- Antineoplastic Agents/administration & dosage
- Antineoplastic Agents/pharmacokinetics
- Antineoplastic Agents/pharmacology
- Biological Transport, Active
- Carcinoma, Hepatocellular/drug therapy
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/metabolism
- Cell Line, Tumor
- Drug Resistance, Multiple
- Drug Resistance, Neoplasm
- Drug Synergism
- Gefitinib
- Hep G2 Cells
- Humans
- Liver Neoplasms/drug therapy
- Liver Neoplasms/genetics
- Liver Neoplasms/metabolism
- MAP Kinase Signaling System
- Neoplasm Proteins/antagonists & inhibitors
- Neoplasm Proteins/genetics
- Niacinamide/administration & dosage
- Niacinamide/analogs & derivatives
- Niacinamide/pharmacokinetics
- Niacinamide/pharmacology
- Phenylurea Compounds/administration & dosage
- Phenylurea Compounds/pharmacokinetics
- Phenylurea Compounds/pharmacology
- Protein Kinase Inhibitors/administration & dosage
- Protein Kinase Inhibitors/pharmacokinetics
- Protein Kinase Inhibitors/pharmacology
- Quinazolines/administration & dosage
- Quinazolines/pharmacology
- RNA, Small Interfering/genetics
- Sorafenib
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Affiliation(s)
- Wei-Chien Huang
- Center for Molecular Medicine, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan
- The Ph.D. program for Cancer Biology and Drug Discovery, China Medical University, Taichung, Taiwan
- Department of Biotechnology, Asia University, Taichung, Taiwan
| | - Yi-Ling Hsieh
- Department of Biological Science & Technology, I-Shou University, Kaohsiung, Taiwan
| | - Chao-Ming Hung
- School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan
- Department of General Surgery, E-Da Hospital, Kaohsiung, Taiwan
| | - Pei-Hsuan Chien
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
| | - Yu-Fong Chien
- Department of Biological Science & Technology, I-Shou University, Kaohsiung, Taiwan
| | - Lei-Chin Chen
- Department of Nutrition, I-Shou University, Kaohsiung, Taiwan
| | - Chih-Yen Tu
- Division of Pulmonary and Critical Care Medicine, China Medical University Hospital, Taichung, Taiwan
- Department of Internal Medicine, China Medical University, Taichung, Taiwan
- Department of Life Science, National Chung-Hsing University, Taichung, Taiwan
| | - Chia-Hung Chen
- Division of Pulmonary and Critical Care Medicine, China Medical University Hospital, Taichung, Taiwan
- Department of Respiratory Therapy, China Medical University, Taichung, Taiwan
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Sheng-Chieh Hsu
- Center for Molecular Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Yueh-Ming Lin
- Division of Colorectal Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yun-Ju Chen
- Department of Biological Science & Technology, I-Shou University, Kaohsiung, Taiwan
- Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
- * E-mail: .
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25
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Shu JC, Soo PC, Chen JC, Hsu SH, Chen LC, Chen CY, Liang SH, Buu LM, Chen CC. Differential regulation and activity against oxidative stress of Dps proteins in Bacillus cereus. Int J Med Microbiol 2013; 303:662-73. [DOI: 10.1016/j.ijmm.2013.09.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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26
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Hsieh YT, Lin MH, Ho HY, Chen LC, Chen CC, Shu JC. Glucose-6-phosphate dehydrogenase (G6PD)-deficient epithelial cells are less tolerant to infection by Staphylococcus aureus. PLoS One 2013; 8:e79566. [PMID: 24223971 PMCID: PMC3817128 DOI: 10.1371/journal.pone.0079566] [Citation(s) in RCA: 19] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 09/25/2013] [Indexed: 01/12/2023] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) is a key enzyme in the pentose phosphate pathway and provides reducing energy to all cells by maintaining redox balance. The most common clinical manifestations in patients with G6PD deficiency are neonatal jaundice and acute hemolytic anemia. The effects of microbial infection in patients with G6PD deficiency primarily relate to the hemolytic anemia caused by Plasmodium or viral infections and the subsequent medication that is required. We are interested in studying the impact of bacterial infection in G6PD-deficient cells. G6PD knock down A549 lung carcinoma cells, together with the common pathogen Staphylococcus aureus, were employed in our cell infection model. Here, we demonstrate that a lower cell viability was observed among G6PD-deficient cells when compared to scramble controls upon bacterial infection using the MTT assay. A significant increase in the intracellular ROS was detected among S. aureus-infected G6PD-deficient cells by observing dichlorofluorescein (DCF) intensity within cells under a fluorescence microscope and quantifying this signal using flow cytometry. The impairment of ROS removal is predicted to enhance apoptotic activity in G6PD-deficient cells, and this enhanced apoptosis was observed by annexin V/PI staining under a confocal fluorescence microscope and quantified by flow cytometry. A higher expression level of the intrinsic apoptotic initiator caspase-9, as well as the downstream effector caspase-3, was detected by Western blotting analysis of G6PD-deficient cells following bacterial infection. In conclusion, we propose that bacterial infection, perhaps the secreted S. aureus α-hemolysin in this case, promotes the accumulation of intracellular ROS in G6PD-deficient cells. This would trigger a stronger apoptotic activity through the intrinsic pathway thereby reducing cell viability when compared to wild type cells.
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Affiliation(s)
- Yi-Ting Hsieh
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Mei-Hui Lin
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Research Center for Pathogenic Bacteria, Chang Gung University, Taoyuan, Taiwan
| | - Hung-Yao Ho
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Healthy Aging Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Lei-Chin Chen
- Department of Nutrition, I-Shou University, Kaohsiung, Taiwan
| | - Chien-Cheng Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
- * E-mail: (C-CC); (J-CS)
| | - Jwu-Ching Shu
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Research Center for Pathogenic Bacteria, Chang Gung University, Taoyuan, Taiwan
- * E-mail: (C-CC); (J-CS)
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27
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Angulo-Barroso RM, Tiernan C, Chen LC, Valentin-Gudiol M, Ulrich D. Treadmill training in moderate risk preterm infants promotes stepping quality--results of a small randomised controlled trial. Res Dev Disabil 2013; 34:3629-3638. [PMID: 24012586 DOI: 10.1016/j.ridd.2013.07.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 07/24/2013] [Accepted: 07/30/2013] [Indexed: 06/02/2023]
Abstract
Infants at risk for neuromotor delay (NMD) are associated with premature birth and low birth weight. These infants frequently exhibit tone, posture, and movement abnormalities. Therefore, it is important to identify potential interventions to facilitate early motor development within this population. The purpose of this study was to examine the potential benefits of treadmill (TM) training in infants at risk for NMD. Furthermore, relationships between TM stepping performance and onset of walking have been suggested, and therefore, were also explored. Twenty-eight infants at moderate risk for NMD were randomly assigned to one of two groups: (1) TM training (experimental) (N=15) or (2) control (N=13). Infants in the experimental group were trained for 8 min/day, five days/week from study entry until walking onset. Monthly, 5 min of TM stepping performance were videotaped and analysed for infants in both groups to obtain frequency and quality of TM stepping. Groups were different in terms of TM stepping performance with experimental group displaying better stepping. However, they did not differ in age of walking onset (experimental=15.1 months, control=14.6 months). In both groups, frequency of TM stepping was significantly related to onset of walking. Findings suggest that TM training as implemented impact the quality of TM stepping, but did not significantly improve walking onset. Given the significant relationship between stepping and walking onset, the moderate affection of the population, the relative low intensity and lack of individualisation of the training, we suggest future research should further explore the impact of TM training on gait-related variables and include individualised, more intense, and prolonged training.
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Affiliation(s)
- R M Angulo-Barroso
- Department of Health and Applied Sciences, INEFC University of Barcelona, Spain; Kinesiology, University of Michigan, Ann Arbor, MI, USA.
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28
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Chen RS, Wang WC, Lu ML, Chen YF, Lin HC, Chen KH, Chen LC. Anomalous quantum efficiency for photoconduction and its power dependence in metal oxide semiconductor nanowires. Nanoscale 2013; 5:6867-73. [PMID: 23779084 DOI: 10.1039/c3nr01635h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The quantum efficiency and carrier lifetime that decide the photoconduction (PC) efficiencies in the metal oxide semiconductor nanowires (NWs) have been investigated. The experimental result surprisingly shows that the SnO2, TiO2, WO3, and ZnO NWs reveal extraordinary quantum efficiencies in common, which are over one to three orders of magnitude lower than the theoretical expectation. The surface depletion region (SDR)-controlled photoconductivity is proposed to explain the anomalous quantum efficiency and its power dependence. The inherent difference between the metal oxide nanostructures such as carrier lifetime, carrier concentration, and dielectric constant leading to the distinct PC performance and behavior are also discussed.
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Affiliation(s)
- R S Chen
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Rd., Taipei 10607, Taiwan.
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29
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Abstract
Exemestane, a steroidal aromatase inhibitor, is licensed for postmenopausal patients with estrogen receptor (ER)-positive breast cancer as second-line therapy in metastatic disease following antiestrogen failure and as part of sequential adjuvant therapy following initial tamoxifen. This study is a systematic literature review, evaluating exemestane in different clinical settings. The Ovid Medline (1948-2012), Embase (1980-2012), and Web of Science (1899-2012) databases were searched. Forty-two relevant articles covering randomized controlled trials were reviewed for efficacy and safety, and three for adherence. With regard to efficacy in metastatic disease, exemestane is superior to megestrol acetate after progression on tamoxifen. There is evidence for noninferiority to fulvestrant (following a prior aromatase inhibitor) and to nonsteroidal aromatase inhibitors in the first-line setting. Combined use with everolimus is shown to be more efficacious than exemestane alone following previous aromatase inhibitor use. In the adjuvant setting, a switch to exemestane after 2-3 years of tamoxifen is superior to 5 years of tamoxifen. Exemestane is noninferior to 5 years of tamoxifen as upfront therapy, and may have a role as an extended adjuvant therapy. Used as neoadjuvant therapy, increased breast conservation is achievable. As chemoprevention, exemestane significantly reduces the incidence of breast cancer in "at-risk" postmenopausal women. Exemestane is associated with myalgias and arthralgias, as well as reduced bone mineral density and increased risk of fracture, which do not appear to persist at follow-up, with subsequent return to pretreatment values. Compared with tamoxifen, there is a reduced incidence of endometrial changes, thromboembolic events, and hot flashes. Limited evidence shows nonadherence in 23%-32% of patients. Evidence is growing in support of exemestane in all clinical settings. It is generally more efficacious and has a better safety profile than tamoxifen. How it compares with the nonsteroidal aromatase inhibitors remains to be established. Further studies are required on adherence to ensure that maximum benefit is obtained.
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Affiliation(s)
- GA Walker
- Clinical Oncology, East Midlands Deanery, University of Nottingham, Nottingham, UK
| | - M Xenophontos
- Breast Surgery, School of Graduate Entry Medicine and Health, University of Nottingham, Nottingham, UK
| | - LC Chen
- Medicine Use, School of Pharmacy, University of Nottingham, Nottingham, UK
| | - KL Cheung
- Breast Surgery, School of Graduate Entry Medicine and Health, University of Nottingham, Nottingham, UK
- Correspondence: Kwok-Leung Cheung Division of Breast Surgery, School of Graduate Entry Medicine and Health, University of Nottingham, Royal Derby Hospital Centre, Uttoxeter Road, Derby DE22 3DT, UK Tel +44 1332 724 881 Fax +44 1332 724 880 Email
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Abstract
Abstract A group of 209 married, fecund women in rural Bangladesh were studied prospectively for 24 months from 1969 to 1971 to define some of the biological and sociological factors relating to fertility performance. These women were selected from a larger study population of 112,000 that had been followed with a daily house-to-house vital registration programme since 1966. The selected women were interviewed bi-weekly and were asked questions about menstruation, pregnancy, lactation, husband's occupational absences, and monthly urine tests for pregnancy were taken. The results for 193 non-contracepting women revealed that the seasonal pattern of births previously observed in this population could be associated with a corresponding seasonal pattern of conceptions and that this was due to a seasonal trend in fecundability. The highest conception rates were in the coolest months of the year. Post-partum lactational amenorrhoea was very prolonged, averaging 17 months for women with a surviving child. The appearance of the first post-partum menstrual flow (onset of ovulation) also had a seasonal trend which could not be adequately explained. The median waiting time to conception, once menstruation had resumed was eight months. This interval was influenced by seasonal fluctuations, as well as by the age of women and by husbands' absences. The foetal wastage rate was 15·0 per 100 conceptions, with 62 per cent of the foetal losses occurring during the second month of gestation. Overall, the average birth interval was 33 months, with the prolonged lactational amenorrhoea accounting for almost 45 per cent of this interval. From the Department of Population Dynamics, Johns Hopkins University, School of Hygiene and Public Health, Baltimore, Maryland 21205.
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Markman B, Tabernero J, Krop I, Shapiro GI, Siu L, Chen LC, Mita M, Melendez Cuero M, Stutvoet S, Birle D, Anak Ö, Hackl W, Baselga J. Phase I safety, pharmacokinetic, and pharmacodynamic study of the oral phosphatidylinositol-3-kinase and mTOR inhibitor BGT226 in patients with advanced solid tumors. Ann Oncol 2012; 23:2399-2408. [PMID: 22357447 DOI: 10.1093/annonc/mds011] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND This phase I dose-escalation study investigated the maximum tolerated dose (MTD), safety, pharmacokinetics, pharmacodynamics (PDs), and preliminary antitumor activity of BGT226, a potent, oral dual phosphatidylinositol-3-kinase (PI3K)/mammalian target of rapamycin inhibitor. PATIENTS AND METHODS Fifty-seven patients with advanced solid tumors received BGT226 2.5-125 mg/day three times weekly (TIW). Dose escalation was guided by an adaptive Bayesian logistic regression model with overdose control. Assessments included response per RECIST, [18F]-fluorodeoxyglucose uptake, and phosphorylated-S6 in skin and paired tumor samples. RESULTS Three patients (125 mg cohort) had dose-limiting toxic effects (grade 3 nausea/vomiting, diarrhea). BGT226-related adverse events included nausea (68%), diarrhea (61%), vomiting (49%), and fatigue (19%). BGT226 demonstrated rapid absorption, variable systemic exposure, and a median half-life of 6-9 h. Seventeen patients (30%) had stable disease (SD) as best response. Nine patients had SD for ≥16 weeks. Thirty patients (53%) achieved stable metabolic disease as assessed by [18F]-fluorodeoxyglucose-positron emission tomography; however, no correlation between metabolic response and tumor shrinkage according to computed tomography was observed. PD changes suggested PI3K pathway inhibition but were inconsistent. CONCLUSIONS The MTD of BGT226 was 125 mg/day TIW, and the clinically recommended dose was 100 mg/day TIW. Limited preliminary antitumor activity and inconsistent target inhibition were observed, potentially due to low systemic exposure.
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Affiliation(s)
- B Markman
- Medical Oncology Department, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - J Tabernero
- Medical Oncology Department, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - I Krop
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - G I Shapiro
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - L Siu
- Department of Medical Oncology and Hematology, Princess Margaret Hospital, Toronto, Canada
| | - L C Chen
- Nevada Cancer Institute, Las Vegas
| | - M Mita
- Cancer Therapy and Research Center, The University of Texas Health Science Center at San Antonio, San Antonio, USA
| | - M Melendez Cuero
- Oncology Translational Medicine, Novartis Pharma AG, Basel, Switzerland
| | - S Stutvoet
- Oncology Translational Medicine, Novartis Pharma AG, Basel, Switzerland
| | - D Birle
- Novartis Institutes for Biomedical Research, Cambridge, USA
| | - Ö Anak
- Oncology Translational Medicine, Novartis Pharma AG, Basel, Switzerland
| | - W Hackl
- Oncology Translational Medicine, Novartis Pharma AG, Basel, Switzerland
| | - J Baselga
- Medical Oncology Department, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain.
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Wu YL, Chen LC, Sheu MH, Chen TH, Wu SC, Wu CL, Li SY, Yang WC, Ng YY. Peritoneal-uterine communication: a complication of prolonged embedding of a peritoneal catheter. ARCH ESP UROL 2012; 32:481-3. [PMID: 22859846 DOI: 10.3747/pdi.2011.00016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Chang SC, Hsuan SL, Lin CC, Lee WC, Chien MS, Chen LC, Wu JH, Cheng SJ, Chen CL, Liao JW. Probable Blastomyces dermatitidis infection in a young rat. Vet Pathol 2012; 50:343-6. [PMID: 22711744 DOI: 10.1177/0300985812451624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
A 21-week-old male untreated control SHR/NCrlNarl rat was found dead during an experiment. Grossly, pulmonary lesions were characterized by multifocal to coalescing firm gray-white nodules randomly scattered on the surface. Microscopically, bronchopneumonia was found with pyogranulomas containing neutrophils, macrophages, and numerous thick-walled yeast cells. Yeast cells, 5 to 25 μm in diameter, with no branching of hyphae were observed by staining with hematoxylin and eosin, Diff-Quik, and periodic acid-Schiff. Furthermore, polymerase chain reaction (PCR) using panfungal and nested PCR primers were used for detection of Blastomyces dermatitidis DNA in the lung tissue. After sequencing and matching with DNA sequences in the GenBank, the sample showed a similarity of 94.6% and 97% to Ajellomyces dermatitidis (B. dermatitidis), respectively. On the basis of these results, probable pulmonary blastomycosis was diagnosed. The origin of the infection in the colony rat is undetermined.
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Affiliation(s)
- S C Chang
- Department of Veterinary Medicine and Veterinary Medical Teaching Hospital, National Chung-Hsing University, Taichung, Taiwan, ROC
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Chen LC, Chen JC, Shu JC, Chen CY, Chen SC, Chen SH, Lin CY, Lu CY, Chen CC. Interplay of RsbM and RsbK controls the σ(B) activity of Bacillus cereus. Environ Microbiol 2012; 14:2788-99. [PMID: 22640257 DOI: 10.1111/j.1462-2920.2012.02788.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The alternative transcription factor σ(B) of Bacillus cereus controls the expression of a number of genes that respond to environmental stress. Four proteins encoded in the sigB gene cluster, including RsbV, RsbW, RsbY (RsbU) and RsbK, are known to be essential in the σ(B)-mediated stress response. In the context of stress, the hybrid sensor kinase RsbK is thought to phosphorylate the response regulator RsbY, a PP2C serine phosphatase, leading to the dephosphorylation of the phosphorylated RsbV. The unphosphorylated RsbV then sequesters the σ(B) antagonist, RsbW, ultimately liberating σ(B). The gene arrangement reveals an open reading frame, bc1007, flanked immediately downstream by rsbK within the sigB gene cluster. However, little is known about the function of bc1007. In this study, the deletion of bc1007 resulted in high constitutive σ(B) expression independent of environmental stimuli, indicating that bc1007 plays a role in σ(B) regulation. A bacterial two-hybrid analysis demonstrated that BC1007 interacts directly with RsbK, and autoradiographic studies revealed a specific C(14)-methyl transfer from the radiolabelled S-adenosylmethionine to RsbK when RsbK was incubated with purified BC1007. Our data suggest that BC1007 (RsbM) negatively regulates σ(B) activity by methylating RsbK. Additionally, mutagenic substitution was employed to modify 12 predicted methylation residues in RsbK. Certain RsbK mutants were able to rescue σ(B) activation in a rsbK-deleted bacterial strain, but RsbK(E439A) failed to activate σ(B), and RsbK(E446A) only moderately induced σ(B). These results suggest that Glu439 is the preferred methylation site and that Glu446 is potentially a minor methylation site. Gene arrays of the rsbK orthologues and the neighbouring rsbM orthologues are found in a wide range of bacteria. The regulation of sigma factors through metylation of RsbK-like sensor kinases appears to be widespread in the microbial world.
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Affiliation(s)
- Lei-Chin Chen
- Department of Nutrition, I-Shou University, Jiaosu Village, Yanchao District, Kaohsiung 82445, Taiwan
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Chen CC, Cheng YY, Chen SC, Tuan YF, Chen YJ, Chen CY, Chen LC. Cyclooxygenase-2 expression is up-regulated by 2-aminobiphenyl in a ROS and MAPK-dependent signaling pathway in a bladder cancer cell line. Chem Res Toxicol 2012; 25:695-705. [PMID: 22288910 DOI: 10.1021/tx2004689] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Overexposure to biphenyl amine compounds, which are found in smoke and azo-dyes, is linked to the occurrence of bladder cancer. However, the molecular mechanisms of biphenyl amine compound-induced bladder cancer are still unclear. Many studies have demonstrated that overexpression of cyclooxygenase-2 (COX-2) in neoplastic lesions is associated with carcinogenesis. In this study, we have demonstrated that 2-aminobiphenyl (2-ABP) up-regulated the expression of COX-2 in a dose- and time-dependent manner in TSGH-8301 bladder cancer cells. This 2-ABP-induced COX-2 expression was attenuated by ROS scavenger NAC and NADPH oxidase inhibitors apocynin and DPI. The p22phox subunit of NADPH oxidase, but not p67, and Nox2 was up-regulated by 2-ABP. Knocking down p22phox by siRNA significantly reduced 2-ABP-induced COX-2 expression. Furthermore, 2-ABP also activated the ERK/JNK-AP1 pathways, and this effect was also abolished by NADPH oxidase inhibitors. Blocking the ERK/JNK-AP1 signaling pathways by pharmacological inhibitors attenuated 2-ABP-induced COX-2 expression. Overexpression of the upstream ERK activator MEK1 significantly and consistently increased 2-ABP-mediated COX-2 expression. Transfection of a dominant negative c-Jun mutant, TAM-67, blocked 2-ABP-mediated COX-2 expression, demonstrating that c-Jun was responsible for the transcriptional activation. Taken together, these results demonstrate that 2-ABP induces the carcinogenic factor COX-2 and that this induction is mediated through NADPH oxidase-derived ROS-dependent JNK/ERK-AP-1 pathways.
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Affiliation(s)
- Chien-Cheng Chen
- Department of Biotechnology, National Kaohsiung Normal University, No. 62, Shenjhong Road, Yanchao District, Kaohsiung City 82444, Taiwan
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Chen RS, Yang TH, Chen HY, Chen LC, Chen KH, Yang YJ, Su CH, Lin CR. Photoconduction mechanism of oxygen sensitization in InN nanowires. Nanotechnology 2011; 22:425702. [PMID: 21934198 DOI: 10.1088/0957-4484/22/42/425702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The photoconduction (PC) mechanism in indium nitride (InN) nanowires (NWs) has been investigated via environment-, temperature-, and power-dependent measurements. The adsorbed oxygen-induced modulation of the surface state is proposed to be the leading factor in the long lifetime or high gain transport and in sensitizing photocurrent generation in the InN NWs. The electron trapping effect by adsorbed oxygen can be verified by the increased activation energy from 33 ± 4 (in vacuum) to 58 ± 2 meV (in oxygen). The observed supralinear power dependence of photocurrent also suggests the presence of acceptor states that influence the carrier recombination behavior and compensate the thermal carriers in the InN NWs. The potential influence of native oxide on the molecule-sensitive PC in this nitride nanomaterial is also inferred.
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Affiliation(s)
- R S Chen
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
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Ching Chen S, Hseu YC, Sung JC, Chen CH, Chen LC, Chung KT. Induction of DNA damage signaling genes in benzidine-treated HepG2 cells. Environ Mol Mutagen 2011; 52:664-72. [PMID: 21818781 DOI: 10.1002/em.20669] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 06/20/2011] [Accepted: 06/21/2011] [Indexed: 05/10/2023]
Abstract
We examined genotoxicity and DNA damage response in HepG2 cells following exposure to benzidine. Using the Comet assay, we showed that benzidine (50-200 μM) induces DNA damage in HepG2 cells. DNA damage signaling pathway-based PCR arrays were used to investigate expression changes in genes involved in cell-cycle arrest, apoptosis, and DNA repair and showed upregulation of 23 genes and downregulation of one gene in benzidine-treated cells. Induction of G2/M arrest and apoptosis was confirmed at the protein level. Real-time PCR and Western blots were used to demonstrate the expression of select DNA repair-associated genes from the PCR array. Upregulation of the p53 protein in benzidine-treated cells suggests the induction of the p53 DNA damage signaling pathway. Collectively, DNA damage response genes induced by benzidine indicate recruitment complex molecular machinery involved in DNA repair, cell-cycle arrest, and potentially, activation of the apoptosis.
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Affiliation(s)
- Ssu Ching Chen
- Department of Life Science, National Central University, Chung-Li City, Taoyan Country, Taiwan, Republic of China.
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Wu JC, Hseu YC, Tsai JS, Chen LC, Chye SM, Chen CH, Ching Chen S. Fenthion and terbufos induce DNA damage, the expression of tumor-related genes, and apoptosis in HEPG2 cells. Environ Mol Mutagen 2011; 52:529-37. [PMID: 21538558 DOI: 10.1002/em.20652] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Accepted: 02/08/2011] [Indexed: 05/04/2023]
Abstract
This study investigates the effects of fenthion and terbufos, two organophosphorous pesticides, on DNA damage, tumor-related gene expression, and apoptosis in HepG2 cells. We found that exposure to concentrations ranging from 50 to 200 μM of fenthion and terbufos for 2 hr caused significant death in HepG2 cells. Both compounds induced DNA damage in a concentration-dependent manner as measured using the alkaline comet assay. Tumor-related genes (jun, myc, and fos) and apoptosis-related genes (socs3, tnfaip3, ppp1r15a, and nr4a1) were up-regulated by both compounds. Finally, both compounds induced apoptosis. The results demonstrate that both terbufos and fenthion induce DNA damage and should be considered potentially hazardous to humans.
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Affiliation(s)
- Jong-C Wu
- Department of Applied Chemistry, Fooyin University, Kaohsiung, Taiwan, Republic of China
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Yang JI, Chen LC, Shih YY, Hsieh C, Chen CY, Chen WM, Chen CC. Cloning and characterization of β-agarase AgaYT from Flammeovirga yaeyamensis strain YT. J Biosci Bioeng 2011; 112:225-32. [PMID: 21715227 DOI: 10.1016/j.jbiosc.2011.05.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 05/29/2011] [Accepted: 05/31/2011] [Indexed: 11/29/2022]
Abstract
A bacterium with potent agar-degrading capability was isolated from the surface of a red algae, Gracilaria tenuistipitata. Based on phenotypic characteristics, 16S rDNA gene sequence and a phylogenetic analysis, this bacterium was identified and named as Flammeovirga yaeyamensis strain YT. PCR using homology-based degenerate primers was employed to clone any agarase gene belonging to GH16 family encoded in F. yaeyamensis strain YT. The resolved 1512 nucleotides revealed that the cloned gene, namely AgaYT, encodes a protein of 503 amino acids comprising a signal peptide, a glycosyl hydrolase catalytic module and a C-terminal domain with an unknown function. The recombinant protein r-AgaYT is an endo-type β-agarase hydrolyzing agarose to yield neoagarobiose and neoagarotetraose as the main hydrolytic products. The specific activity of r-AgaYT was determined about 178.6 U mg(-1) at 40°C and pH 8.0.
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Affiliation(s)
- Jing-Iong Yang
- Department of Seafood Science, National Kaohsiung Marine University, No. 142 Hai-chuan Rd., Nan-tzu, Kaohsiung, Taiwan
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Abstract
Of all patients with systemic lupus erythematosus (SLE), 15-20% are diagnosed during childhood, with disease onset prior to the age of 16 years. Because disease expression in SLE is influenced by environment factors and differs between racial and ethnic groups. The aims of this review were to describe prevalence, clinical manifestations, common infectious complications, and outcome of pediatric-onset SLE in Asia. The prevalence of pediatric-onset SLE was 6.3-19.3 per 100,000 in Asia. The ratio of female to male was 4.7-6.2. The mean age at diagnosis of pediatric-onset SLE was 8.6-13.5 years. The most common clinical features of pediatric-onset SLE in Asia were cutaneous rashes, arthritis, hematological involvement and nephritis. The occurrence of nephritis varies from 29% to 81%. The most common histopathology of lupus nephritis was diffuse proliferative glomerulonephritis (WHO Class-IV) which occurred in 39.4-54% of case of lupus nephritis. Pediatric-onset SLE patients with infections have poor outcomes than uninfected patients. Gram-negative bacilli are the most common microorganisms responsible for bacteremia in Asian patients with SLE. Recurrent major infections predict poorer disease outcome and associated organ damage in pediatric-onset SLE. Improving the survival of SLE patients was reported in Asia in recent decades. The survival was 92% at the age of 5 years, 86% at 10 years and 79% at 15 years in children with SLE in Taiwan in 2008.
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Affiliation(s)
- J L Huang
- Department of Pediatrics, Chang Gung Memorial Hospital, and Chang Gung University, Taoyuan, Taiwan.
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Chung YM, Chang FR, Tseng TF, Hwang TL, Chen LC, Wu SF, Lee CL, Lin ZY, Chuang LY, Su JH, Wu YC. A novel alkaloid, aristopyridinone A and anti-inflammatory phenanthrenes isolated from Aristolochia manshuriensis. Bioorg Med Chem Lett 2011; 21:1792-4. [DOI: 10.1016/j.bmcl.2011.01.067] [Citation(s) in RCA: 21] [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] [Received: 11/15/2010] [Revised: 12/31/2010] [Accepted: 01/17/2011] [Indexed: 10/18/2022]
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Chow SN, Chen RJ, Chen CH, Chang TC, Chen LC, Lee WJ, Shen J, Chow LP. Analysis of protein profiles in human epithelial ovarian cancer tissues by proteomic technology. EUR J GYNAECOL ONCOL 2010; 31:55-62. [PMID: 20349782] [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: 05/29/2023]
Abstract
BACKGROUND Screening in ovarian cancer is progressively finding out candidate genes and proteins which may work as screening biomarkers and play a role in tumor progression. We examined the protein expression patterns of ovarian cancer tissues using two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser desorption/ionization-time of fight mass spectrometry (MALDI-TOF MS). METHODS Tissues from 36 ovarian cancers and 20 normal ovaries were examined by 2-DE. The images of silver stained gels were analyzed by ImageMaster 2D Elite. The peptide mixtures, after in-gel digestion, were determined by MALDI-TOF MS for fingerprinting. The de-isotope tryptic peptide profiles were matched by using the Mascot search engine based on the entire NCBI and Swiss-Prot protein databases. Western/dot blots were then applied to verify the findings. RESULTS In ovarian cancer, 12 proteins that showed differential expressions were identified unequivocally. Among these proteins, five proteins (galectin-1, cathepsin B, ubiquitin carboxy-terminal hydrolase L1, HLA class II antigen DRB1-11 and heat shock protein 27) were up-regulated and seven proteins (cellular retinol-binding protein, transthyretin, SH3 binding glutamic-rich-like protein, tubulin-specific chaperone A, DJ-1, gamma-actin and tropomyosin 4) were down-regulated. CONCLUSION The present study is the first to report the up-regulation of ubiquitin carboxy-terminal hydrolase L1 and the down-regulation of SH3 binding glutamic-rich-like protein, tubulin-specific chaperone A, and tropomyosin 4 in human ovarian cancer tissues. Further cloning and functional analysis of these salient proteins will provide more information on their pathophysiologic roles in ovarian cancer.
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Affiliation(s)
- S N Chow
- Department of Obstetrics and Gynecology, College of Medicine and National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan.
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Kong CH, Chen LC, Xu XH, Wang P, Wang SL. Allelochemicals and activities in a replanted Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) tree ecosystem. J Agric Food Chem 2008; 56:11734-11739. [PMID: 19053367 DOI: 10.1021/jf802666p] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Autotoxicity is a major reason for replant problems in managed tree ecosystems. Studies have related phenolics-based allelochemicals to autotoxicity. We selected a 20-year-old replanted Chinese fir [Cunninghamia lancealata (Lamb.) Hook] tree ecosystem to isolate, identify, determine the biological activity of, and quantify soil phytotoxins. Eight common phenolics (coumarin, vanillin, isovanillin, and p-hydroxybenzoic, vanillic, benzoic, cinnamic, and ferulic acids), friedelin, and a novel cyclic dipeptide (6-hydroxy-1,3-dimethyl-8-nonadecyl-[1,4]-diazocane-2,5-diketone) were obtained by using the bioassay-guided isolation technique from toxic soil of the replanted Chinese fir tree ecosystem. Chemical structures were determined by spectroscopic means, including 2D-NMR (COSY, HMQC, HMBC, and NOESY) experiments. High concentrations of soil phenolics and friedelin were observed in the natural evergreen broadleaf forest (CK) rather than in the Chinese fir tree ecosystem. The phenolics and friedelin were not phytotoxic to Chinese fir trees. However, the cyclic dipeptide inhibited Chinese fir growth at soil concentrations determined in the replanted Chinese fir tree ecosystem. There was a significantly higher soil concentration of cyclic dipeptide in the replanted Chinese fir tree ecosystem than in a fresh Chinese fir tree ecosystem. The results suggest that phenolics and friedelin are not key allelochemicals since they are weakly phytotoxic and are detected in low concentrations in the replanted Chinese fir tree ecosystem, while cyclic dipeptide is a highly active allelochemical with a phytotoxic effect that limits offspring growth in the replanted Chinese fir tree ecosystem. The discovery of cyclic dipeptide, as well as a further understanding of its potential action mechanism in the replanted Chinese fir tree ecosystem, may contribute to solving the replant problems in managed tree ecosystems.
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Affiliation(s)
- C H Kong
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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Chang HJ, Hsieh YP, Chen TT, Chen YF, Liang CT, Lin TY, Tseng SC, Chen LC. Strong luminescence from strain relaxed InGaN/GaN nanotips for highly efficient light emitters. Opt Express 2007; 15:9357-65. [PMID: 19547278 DOI: 10.1364/oe.15.009357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Semiconductor heterostructures represent the most important building block for current optoelectronic devices. One of the common features of semiconductor heterostructures is the existence of internal strain due to lattice mismatch. The internal strain can tilt the band alignment and significantly alter the physical properties of semiconductor heterostructures, such as reducing the internal quantum efficiency of a light emitter. Here, we provide a convenient route to release the internal strain by patterning semiconductor heterostructures into nanotip arrays. The fabrication of the nanotip arrays was achieved by self-masked dry etching technique, which is simple, low cost and compatible with current semiconductor technologies. By implementing our approach to InGaN/GaN multiple quantum wells, we demonstrate that the light emission can be enhanced by up to 10 times. Our approach renders an excellent opportunity to manipulate the internal strain, and is very useful to create highly efficient solid state emitters.
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Chen JT, Hsiao CL, Hsu HC, Wu CT, Yeh CL, Wei PC, Chen LC, Chen KH. Epitaxial Growth of InN Films by Molecular-Beam Epitaxy Using Hydrazoic Acid (HN3) as an Efficient Nitrogen Source. J Phys Chem A 2007; 111:6755-9. [PMID: 17500542 DOI: 10.1021/jp068949g] [Citation(s) in RCA: 14] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Epitaxial InN films have been successfully grown on c-plane GaN template by gas-source molecular-beam epitaxy with hydrazoic acid (HN3) as an efficient nitrogen source. Results in residual-gas analyzer show that the HN3 is highly dissociated to produce nitrogen radicals and can be controlled in the amounts of active nitrogen species by tuning HN3 pressure. A flat and high-purity InN epifilm has been realized at the temperature near 550 degrees C, and a growth rate of 200 nm/hr is also achieved. Moreover, the epitaxial relationship of the InN(002) on the GaN(002) is reflected in the X-ray diffraction, and the full-width at half-maximum of the InN(002) peak as narrow as 0.05 degrees is related to a high-quality crystallinity. An infrared photoluminescence (PL) emission peak at 0.705 eV and the integrated intensity increasing linearly with excitation power suggest that the observed PL can be attributed to a free-to-bound recombination.
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Affiliation(s)
- J T Chen
- Graduate Institute in Electro-Optical Engineering, Tatung University, Taipei 104, Taiwan
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Abstract
In this report, we describe the visible-laser desorption/ionization of biomolecules deposited on gold-coated porous silicon and gold nanorod arrays. The porous silicon made by electrochemical etching was coated with gold using argon ion sputtering. The gold nanorod arrays were fabricated by electrodepositing gold onto a porous alumina template, and the subsequent partial removal of the alumina template. A frequency-doubled/tripled Nd : YAG laser was used to irradiate the gold nanostructured substrate, and the desorbed molecular ions were mass-analyzed by a time-of-flight mass spectrometer. The desorption/ionization of biomolecules for both substrates was favored by the use of the 532-nm visible-laser, which is in the range of the localized surface plasmon resonance of the gold nanostructure. The present technique offers a potential analytical method for low-molecular-weight analytes that are rather difficult to handle in the conventional matrix-assisted laser desorption/ionization (MALDI) mass spectrometry.
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Affiliation(s)
- L C Chen
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan
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Wang JM, Ko CY, Chen LC, Wang WL, Chang WC. Functional role of NF-IL6beta and its sumoylation and acetylation modifications in promoter activation of cyclooxygenase 2 gene. Nucleic Acids Res 2006; 34:217-31. [PMID: 16397300 PMCID: PMC1325205 DOI: 10.1093/nar/gkj422] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [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] [Indexed: 01/20/2023] Open
Abstract
NF-IL6β regulates gene expression and plays function roles in many tissues. The EGF-regulated cyclooxygenase-2 (cox-2) expression is mediated through p38MAPK signaling pathway and positively correlates with NF-IL6β expression in A431 cells. NF-IL6β coordinated with c-Jun on cox-2 transcriptional activation by reporter and small interfering RNA assays. NF-IL6β could directly bind to CCAAT/enhancer-binding protein (C/EBP) and cyclic AMP-response element (CRE) sites of the cox-2 promoter by in vitro-DNA binding assay. The C/EBP site was important for basal and, to a lesser extent, for EGF-regulated cox-2 transcription, while the CRE site was a more specific response to EGF inducibility of cox-2 gene. SUMO1 expression attenuated EGF- and NF-IL6β-induced cox-2 promoter activities. NF-IL6β was found to be sumoylated by in vivo- and in vitro-sumoylation assays, and the SUMO1-NF-IL6β (suNF-IL6β) lost its ability to interact with p300 in in vitro-binding assay. NF-IL6β was also acetylated by p300, and acetylation of NF-IL6β enhanced the cox-2 promoter activity stimulated by NF-IL6β itself. In vivo-DNA binding assay demonstrated that EGF stimulated the recruitment of p300 and NF-IL6β to the cox-2 promoter, yet promoted the dissociation of SUMO1-modificated proteins from the promoter. These results indicated that NF-IL6β plays a pivotal role in the regulation of basal and EGF-induced cox-2 transcription.
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Affiliation(s)
- Ju-Ming Wang
- Department of Pharmacology, College of Medicine, National Cheng Kung UniversityTainan, Taiwan
| | - Chiung-Yuan Ko
- Department of Pharmacology, College of Medicine, National Cheng Kung UniversityTainan, Taiwan
| | - Lei-Chin Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung UniversityTainan, Taiwan
- Department of Medical Nutrition, I-Shou UniversityDashu Township, Kaohsiung County, Taiwan
| | - Wen-Lin Wang
- Department of Pharmacology, College of Medicine, National Cheng Kung UniversityTainan, Taiwan
| | - Wen-Chang Chang
- Department of Pharmacology, College of Medicine, National Cheng Kung UniversityTainan, Taiwan
- To whom correspondence should be addressed. Tel: +886 6 235 3535 Ext. 5496; Fax: +886 6 274 9296;
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Abstract
PURPOSE Drug utilization studies are important for the optimization of drug therapy and have received a great attention in recent years. Most of the information on drug use patterns has been derived from studies in modern Western medicines; however, studies regarding the drug utilization of traditional Chinese medicine (CM) are few. The present study was the first clinical research to evaluate the drug utilization patterns of Chinese herbal medicines in a general hospital in Taiwan. METHODS Data were collected prospectively from the patients attending the Traditional Medicine Center of Taipei Veteran General Hospital under CM drug treatments. The study was carried out over a period of 1 year, from January 2002 to December 2002. Core drug use indicators, such as the average number of drugs per prescriptions, the dosing frequency of prescriptions, and the most common prescribed CM herbs and formulae were evaluated. The primary diagnosis and the CM drugs prescribed for were also revealed. All data were analyzed by descriptive statistics. RESULTS A total of 10 737 patients, representing 52 255 CM drugs, were screened during the study period. Regarding the prescriptions, the average number of drugs per prescription was 4.87 and 37.21% of prescriptions were composed by five drugs. Most of prescriptions (91.38%) were prescribed for three times a day. The most often prescribed Chinese herb was Hong-Hwa (5.76%) and the most common Chinese herbal formula was Jia-Wey-Shiau-Yau-San (3.80%). The most frequent main diagnosis was insomnia (15.58%), followed by menopause (5.22%) and constipation (5.09%). CONCLUSION The survey revealed the drug use pattern of CMs in a general hospital. The majority of CM prescriptions were composed by 3-6 drugs and often prescribed for three times a day. Generally, the rational drug uses of CM drugs were provided with respect to the various diagnoses.
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Affiliation(s)
- L C Chen
- Department of Pharmacy, Taipei Veterans General Hospital, Taipei, Taiwan
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Chen LC, Chen BK, Chang WC. Activating protein 1-mediated cyclooxygenase-2 expression is independent of N-terminal phosphorylation of c-Jun. Mol Pharmacol 2005; 67:2057-69. [PMID: 15772294 DOI: 10.1124/mol.104.010900] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Transcriptional activation of the cyclooxygenase (COX)-2 gene is responsible for high level of prostaglandin production during inflammation and carcinogenesis. We found previously that c-Jun induction plays a crucial role in epidermal growth factor (EGF)-induced gene expression of COX-2. In this study, the functional role of c-Jun in EGF-induced transcriptional activation of COX-2 in A431 cells was investigated. We found that overexpression of c-Jun N-terminal phosphorylation site mutants had similar stimulatory effects on COX-2 promoter activity and protein expression as c-Jun wild type. TAM-67, a mutant of c-Jun that lacks the N-terminal transactivation domain of c-Jun, also enhanced COX-2 promoter activity and protein expression in cells treated with EGF. In vitro DNA affinity precipitation and reporter assays revealed that regulation of c-Jun C terminus by EGF enhanced c-Jun binding to COX-2 promoter and induced COX-2 expression. Furthermore, we demonstrated that c-Fos, which provides transactivation function in Jun/Fos heterodimer, was required for EGF-induced expression of COX-2. These results indicated that c-Jun N-terminal phosphorylation was not required for EGF-induced expression of COX-2. c-Jun, which could recruit other transcription factors such as c-Fos, was required for EGF-induced expression of COX-2 in A431 cells.
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Affiliation(s)
- Lei-Chin Chen
- Department of Pharmacology, College of Medicine, National Cheng-Kung University, No.1 Ta-Hsueh Road, Tainan 701, Taiwan
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Wu MH, Wang CA, Lin CC, Chen LC, Chang WC, Tsai SJ. Distinct regulation of cyclooxygenase-2 by interleukin-1beta in normal and endometriotic stromal cells. J Clin Endocrinol Metab 2005; 90:286-95. [PMID: 15483103 DOI: 10.1210/jc.2004-1612] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Aberrant production of cyclooxygenase-2 (COX-2) plays pivotal roles in many pathological processes including tumorigenesis and endometriosis, although the underlying mechanism remains obscure. Herein we report evidence to demonstrate that COX-2 is distinctly regulated by IL-1beta in normal and endometriotic stroma. Ectopic endometriotic stromal cell is at least 100 times more sensitive to IL-1beta treatment, compared with its eutopic counterpart. Induction of COX-2 expression in normal endometrial stroma by IL-1beta is primary due to enhancement of COX-2 mRNA stability. In contrast, IL-1beta not only increases COX-2 mRNA stability but also up-regulates COX-2 promoter activity in ectopic endometriotic stroma. Induction of COX-2 promoter activity by IL-1beta is mediated via MAPK-dependent phosphorylation of cAMP-responding element binding protein. Promoter activity and EMSAs demonstrate that a cAMP response element site located at -571/-564 of COX-2 promoter is critical for IL-1beta-induced COX-2 gene expression. Our results indicate that elevation of COX-2 expression in endometriotic tissues may result from increased sensitivity to proinflammatory cytokines such as IL-1beta, which is consistently present in the peritoneal fluid of endometriosis patients. Distinct regulation of COX-2 gene by IL-1beta may play a critical role in pathophysiological processes such as cancer formation and endometriosis.
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Affiliation(s)
- Meng-Hsing Wu
- The Institute of Clinical Medicine, Department of Obstetrics and Gynecology, College of Medicine, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan, Republic of China
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