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Chang JWC, Hsieh JJ, Tsai CY, Chiu HY, Lin YF, Wu CE, Shen YC, Hou MM, Chang CY, Chen JA, Chen CL, Chiu CT, Yeh YM, Chiu CH. Gut microbiota and clinical response to immune checkpoint inhibitor therapy in patients with advanced cancer. Biomed J 2024:100698. [PMID: 38280521 DOI: 10.1016/j.bj.2024.100698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 01/07/2024] [Accepted: 01/14/2024] [Indexed: 01/29/2024] Open
Abstract
BACKGROUND There is currently no well-accepted consensus on the association between gut microbiota and the response to treatment of immune checkpoint inhibitors (ICIs) in patients with advanced cancer. METHODS Fecal samples were collected before ICI treatment. Gut microbiota was analyzed using 16 S ribosomal RNA sequencing. We investigated the relationship between the α-diversity of fecal microbiota and patients' clinical outcomes. Microbiota profiles from patients and healthy controls were determined. Pre-treatment serum was examined by cytokine array. RESULTS We analyzed 74 patients, including 42 with melanoma, 8 with kidney cancer, 13 with lung cancer, and 11 with other cancers. Combination therapy of anti-PD1 and anti-CTLA-4 was used in 14 patients, and monotherapy in the rest. Clinical benefit was observed in 35 (47.3 %) cases, including 2 complete responses, 16 partial responses, and 17 stable diseases according to RECIST criteria. No significant difference in α-diversity was found between the benefiter and non-benefiter groups. However, patients with α-diversity within the range of our healthy control had a significantly longer median overall survival (18.9 months), compared to the abnormal group (8.2 months) (p = 0.041, hazard ratio = 0.546) for all patients. The microbiota composition of the benefiters was similar to that of healthy individuals. Furthermore, specific bacteria, such as Prevotella copri and Faecalibacterium prausnitzii, were associated with a favorable outcome. We also observed that serum IL-18 before treatment was significantly lower in the benefiters, compared to non-benefiters. CONCLUSIONS The α-diversity of gut microbiota is positively correlated with more prolonged overall survival in cancer patients following ICI therapy.
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Affiliation(s)
- John Wen-Cheng Chang
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan; Immuno-Oncology Center of Excellence, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Jia-Juan Hsieh
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chih-Yu Tsai
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Horng-Yih Chiu
- School of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Yu-Feng Lin
- Immuno-Oncology Center of Excellence, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Department of Nursing, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chiao-En Wu
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan; Immuno-Oncology Center of Excellence, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yung-Chi Shen
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Ming-Mo Hou
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan; Immuno-Oncology Center of Excellence, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chieh-Ying Chang
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Jian-An Chen
- Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chyi-Liang Chen
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Department of Microbiology and Immunology, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Cheng-Tang Chiu
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Chang Gung Microbiota Therapy Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yuan-Ming Yeh
- Chang Gung Microbiota Therapy Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Taoyuan, Taiwan; Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
| | - Cheng-Hsun Chiu
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Chang Gung Microbiota Therapy Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
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Chen J, Chen JA, Chen CC, Yang YH, Teklu YE, Chang LR, Feng KM. A One-Size-Fits-All Approach to Pressure Ulcers: Whole-Buttock Fasciocutaneous Advancement Flap. Ann Plast Surg 2023; 90:S95-S102. [PMID: 37075299 DOI: 10.1097/sap.0000000000003466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
BACKGROUND Buttock pressure injuries can be difficult to treat. There are many choices of flaps to reconstruct these wounds, but few are large, technically simple, and easily recycled. AIM AND OBJECTIVE We are presenting our experience on surgical reconstruction of buttock pressure injuries using large whole-buttock fasciocutaneous flaps that are easily designed for ulcers regardless of location and size and are easily recycled for treatment of recurrences. MATERIAL AND METHODS We conducted a retrospective review of all patients who received reconstruction with fasciocutaneous rotational flaps for buttock region pressure injuries from January 2013 to December 2018. The key steps of this one-size-fits-all flap include elevation of a large, oversized flap to achieve tension-free closure, avoiding fascial incisions over bony prominences, placing the V-Y type closure wound in the posteromedial thigh, and the use of closed incisional negative wound therapy postoperatively. RESULTS Fifty patients underwent 54 flaps reconstruction for coverage of stage 4 gluteal pressure injuries between January 2013 and December 2018. Seventy-four percent healed without the need for further operation. The average size of the defect was 90 cm2 (maximum = 300 cm2). The average follow-up period was 31 months. Four of the 54 flaps were "recycled" flaps, 3 were performed for the coverage of recurrent ulcers and 1 flap was performed for treatment of a postoperative wound dehiscence. CONCLUSIONS We recommend this simple, one-size-fits-all approach, whole-buttock fasciocutaneous flap when surgically treating gluteal pressure injuries for selected patients.
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Affiliation(s)
- Jill Chen
- From the Department of Plastic and Reconstructive Surgery, E-Da Hospital, I-Shou University
| | - Jian-An Chen
- Department of Plastic and Reconstructive Surgery, Kaohsiung Armed Forces General Hospital
| | - Chien-Chung Chen
- From the Department of Plastic and Reconstructive Surgery, E-Da Hospital, I-Shou University
| | - Yi-Hsuan Yang
- From the Department of Plastic and Reconstructive Surgery, E-Da Hospital, I-Shou University
| | - Yonas Eshetu Teklu
- From the Department of Plastic and Reconstructive Surgery, E-Da Hospital, I-Shou University
| | - Li-Ren Chang
- From the Department of Plastic and Reconstructive Surgery, E-Da Hospital, I-Shou University
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Gao CC, Chen JA, Wang AP. [Research progress of induced pluripotent stem cells in promoting wound healing of diabetic foot ulcers]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2022; 38:864-869. [PMID: 36177592 DOI: 10.3760/cma.j.cn501120-20210630-00230] [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: 06/16/2023]
Abstract
Chronic wounds such as diabetic foot ulcers are epidemic, which bring huge burdens to both the patients and the society. However, with current treatment methods, diabetic foot ulcers often heal poorly and recur frequently, so it is urgent and important to find new and advanced therapies. Stem cell therapy has been proved by a large number of pre-clinical and clinical studies as a potential treatment for chronic wounds. However, the acquisition of stem cells often depends on invasive techniques, and immunogenicity and limited cell survival in vivo also limit the large-scale application and promotion of stem cell therapy. In the recent years, with the development and advance of induced pluripotent stem cell (iPSC) technology, it has shown a strong translational potential in the treatment of chronic wounds such as diabetic foot ulcers. This article reviews the applications and prospect of iPSCs in animal wound healing models including diabetic ulcers and limb ischemia, the limitations of their clinical application, and the methods to improve their safety.
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Affiliation(s)
- C C Gao
- Department of Endocrinology, Air Force Hospital of Eastern Theater Command, Diabetic Foot Center, Nanjing 210002, China
| | - J A Chen
- Department of Endocrinology, Air Force Hospital of Eastern Theater Command, Diabetic Foot Center, Nanjing 210002, China
| | - A P Wang
- Department of Endocrinology, Air Force Hospital of Eastern Theater Command, Diabetic Foot Center, Nanjing 210002, China
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Yang C, Lin ZI, Chen JA, Xu Z, Gu J, Law WC, Yang JHC, Chen CK. Organic/Inorganic Self-Assembled Hybrid Nano-Architectures for Cancer Therapy Applications. Macromol Biosci 2021; 22:e2100349. [PMID: 34735739 DOI: 10.1002/mabi.202100349] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/25/2021] [Indexed: 12/20/2022]
Abstract
Since the conceptualization of nanomedicine, numerous nanostructure-mediated drug formulations have progressed into clinical trials for treating cancer. However, recent clinical trial results indicate such kind of drug formulations has a limited improvement on the antitumor efficacy. This is due to the biological barriers associated with those formulations, for example, circulation stability, extravasation efficiency in tumor, tumor penetration ability, and developed multi-drug resistance. When employing for nanomedicine formulations, pristine organic-based and inorganic-based nanostructures have their own limitations. Accordingly, organic/inorganic (O/I) hybrids have been developed to integrate the merits of both, and to minimize their intrinsic drawbacks. In this context, the recent development in O/I hybrids resulting from a self-assembly strategy will be introduced. Through such a strategy, organic and inorganic building blocks can be self-assembled via either chemical covalent bonds or physical interactions. Based on the self-assemble procedure, the hybridization of four organic building blocks including liposomes, micelles, dendrimers, and polymeric nanocapsules with five functional inorganic nanoparticles comprising gold nanostructures, magnetic nanoparticles, carbon-based materials, quantum dots, and silica nanoparticles will be highlighted. The recent progress of these O/I hybrids in advanced modalities for combating cancer, such as, therapeutic agent delivery, photothermal therapy, photodynamic therapy, and immunotherapy will be systematically reviewed.
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Affiliation(s)
- Chengbin Yang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Zheng-Ian Lin
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Jian-An Chen
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Zhourui Xu
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Jiayu Gu
- Department of Pharmacy, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, China
| | - Wing-Cheung Law
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Jason Hsiao Chun Yang
- Department of Fiber and Composite Materials, Feng Chia University, Taichung, 40724, Taiwan
| | - Chih-Kuang Chen
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
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Huang PW, Jeng SF, Liu CM, Chen CC, Chang LR, Shih HS, Chen HF, Yang CH, Chen JA, Feng GM. Involvement of Aquaporins in the Intense Pulsed Light-Enhanced Wound Healing in Diabetic Rats. Lasers Surg Med 2020; 53:549-556. [PMID: 32757279 DOI: 10.1002/lsm.23303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/23/2020] [Accepted: 07/19/2020] [Indexed: 11/12/2022]
Abstract
BACKGROUND AND OBJECTIVES We previously demonstrated that intense pulsed light (IPL) irradiation prior to wounding improved the wound healing in rats with diabetes mellitus (DM). Also, we found that IPL upregulated the expression of aquaporin 3 (AQP3), a protein that is crucial for wound healing, in normal rats. This present study aimed to examine the involvement of AQPs in the IPL-enhanced wound healing in diabetic rats. STUDY DESIGN/MATERIALS AND METHODS Streptozotocin was used to induce diabetes in Sprague-Dawley rats. Animals were divided into four groups: normal group, DM only group, DM rats with IPL treatment 2 weeks before wounding (DM + IPL-Pre group), and DM rats with concurrent IPL irradiation and wounding (DM + IPL-Con group). Wounds were created on the dorsal skin of rats. The expressions of AQP1, 3, 4, 7, and 9 in the pre-injured skin, periwound, and wound were determined. RESULTS Among all the AQPs analyzed, only the expressions of AQP3 and AQP7 were significantly altered. Unirradiated diabetic rats showed much higher expression level of AQP3 in the regenerating skin compared with normal rats. IPL pretreatment, but not concurrent treatment, attenuated the expression toward the level detected in the normal wounds. In contrast, a lower expression level of AQP7 was noted in the regenerating skin of DM only rats and IPL pretreatment upregulated the expression to a level similar to that in the normal rats. CONCLUSION The beneficial effect of IPL pretreatment on the wound healing in diabetic rats might involve a mechanism by which the expression of AQPs is regulated. Lasers Surg. Med. © 2020 Wiley Periodicals LLC.
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Affiliation(s)
- Po-Wei Huang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 804, Taiwan.,Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, 804, Taiwan.,Division of Urology, Department of Surgery, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung, 813, Taiwan
| | - Seng-Feng Jeng
- Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, 840, Taiwan.,Department of Plastic Surgery, E-DA Hospital, Kaohsiung, 824, Taiwan
| | - Chi-Ming Liu
- Division of General Surgery, Department of Surgery, Cheng Hsin General Hospital, Taipei, 112, Taiwan
| | - Chien-Chung Chen
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung, 824, Taiwan
| | - Li-Ren Chang
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung, 824, Taiwan
| | - Hsiang-Shun Shih
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung, 824, Taiwan
| | - Hsing-Fu Chen
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung, 824, Taiwan
| | - Chih-Hui Yang
- Department of Biological Science and Technology, I-Shou University, Kaohsiung, 824, Taiwan
| | - Jian-An Chen
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung, 824, Taiwan.,Division of Plastic Surgery, Department of Surgery, Kaohsiung Armed Forces General Hospital, Kaohsiung, 802, Taiwan
| | - Guan-Ming Feng
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung, 824, Taiwan
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Chen CK, Liao MG, Wu YL, Fang ZY, Chen JA. Preparation of Highly Swelling/Antibacterial Cross-Linked N-Maleoyl-Functional Chitosan/Polyethylene Oxide Nanofiber Meshes for Controlled Antibiotic Release. Mol Pharm 2020; 17:3461-3476. [DOI: 10.1021/acs.molpharmaceut.0c00504] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Chih-Kuang Chen
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, R.O.C
| | - Min-Gan Liao
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, R.O.C
| | - Yi-Ling Wu
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, R.O.C
| | - Zi-Yu Fang
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, R.O.C
| | - Jian-An Chen
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, R.O.C
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Chen JA, Yu Y, Xue C, Chen XL, Cui GY, Li J, Li KF, Ren ZG, Sun RR. Low microRNA-139 expression associates with poor prognosis in patients with tumors: A meta-analysis. Hepatobiliary Pancreat Dis Int 2019; 18:321-331. [PMID: 30290990 DOI: 10.1016/j.hbpd.2018.09.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 09/20/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND microRNA-139 (miR-139) is dysregulated in various types of tumors and plays a key role in carcinogenesis. miR-139 may be used as a diagnostic and prognostic biomarker of cancers. However, the data from the literature are not consistent. The present study aimed to verify the prognostic and diagnostic values of miR-139 in solid tumors. DATA SOURCES PubMed, Web of Science and Embase databases were searched and publications from January 2011 to August 2017 were included. We used Gene Expression Omnibus (GEO) and The Cancer Genome Atlas (TCGA) database to further validate this meta-analysis. RESULTS Eight individual studies from seven articles were included. Pooled analyses showed that low miR-139 expression was related to worse overall survival (OS) [hazard ratio (HR) = 2.27; 95% confidence intervals (CI): 1.74-2.95; P < 0.001] in solid tumors, including hepatocellular carcinoma (HCC) and glioblastoma multiforme (GBM), consisting with the results of TCGA. However, our results of CRC showed that low miR-139 expression was associated with poor OS which was contradictory with the results in TCGA database and need larger samples to validate the phenomenon; whereas for CRC patients, high miR-139 expression predicted poor RFS, which was in good accordance with TCGA results. The results of 27 microarrays from GEO database showed that miR-139 expression levels were lower in tumor tissues compared to adjacent non-tumor tissues or healthy tissues. Decreased miR-139 expression was also significantly correlated with poor differentiation grade (OR = 3.57; 95% CI: 1.44-8.85; P = 0.006). However, the combined data indicated that no associations between miR-139 expression and the following parameters such as age (pooled OR = 1.50; 95% CI: 0.69-3.24; P = 0.304), gender (pooled OR = 0.92; 95% CI: 0.56-1.51; P = 0.738), tumor size (pooled OR = 1.51; 95% CI: 0.69-3.31; P = 0.298), late tumor-node-metastasis stage (pooled OR = 1.63; 95% CI: 0.99-2.68; P = 0.057) and lymph-node-metastasis (pooled OR = 0.66; 95% CI: 0.34-1.28; P = 0.222). CONCLUSIONS Low miR-139 expression was related to poor prognosis in HCC and GBM, which could be regarded as a potential prognostic biomarker. However, its precise functional role in CRC still need to be further investigated through larger samples and multicenter studies.
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Affiliation(s)
- Jian-An Chen
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yan Yu
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Chen Xue
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Xiao-Long Chen
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Guang-Ying Cui
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Juan Li
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Kong-Fei Li
- Department of Hematology, Yinzhou People's Hospital Affiliated to Medical College of Ningbo University, Ningbo 315040, China
| | - Zhi-Gang Ren
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Ran-Ran Sun
- Precision Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Key Laboratory of Clinical Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
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Li J, Guo ZX, Chen JA, Xue C, Sun LL, Ren ZG, Li A, Cui GY, Yu ZJ. [Studies on the role of chromobox protein homolog 2 in the inhibition of progression of hepatoma]. Zhonghua Gan Zang Bing Za Zhi 2019; 27:192-197. [PMID: 30929335 DOI: 10.3760/cma.j.issn.1007-3418.2019.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore chromobox protein homolog 2 (CBX2) expressions in relation to clinical features of patients and elucidate its role in the progression of hepatocellular carcinoma. Methods: Using the Cancer Genome Atlas (TCGA) database, R language was used to analyze the distribution of differentially expressed mRNA in hepatocellular carcinoma. The different expression of CBX2 in HCC and adjacent tissues and its relationship with survival and clinical characteristics of patients were further analyzed. The expression of CBX2 in liver tissues, liver cancer tissue, and L02, HepG2 and SMMC-7721 cell lines was detected by real time-PCR and western blot. The expression of CBX2 was interfered by siRNA in hepatoma cell line. MTT, colony formation, transwell assays, and flow cytometry were used to identify the proliferation, apoptosis, invasion and clone-formation ability of HepG2 and SMMC-7721 cells after CBX2 down-regulation. According to the different data, t-test, ANOVA, chi-square test, and COX regression model were used for statistical analysis. Survival curve was plotted through Kaplan-Meier method. Results: TCGA public database analysis showed that the expression of CBX2 mRNA in hepatocellular carcinoma tissues (7.296 ± 1.6115) was significantly higher than normal liver tissues (4.706 ± 0.940) (P = 0.000). In addition, the overall survival time of patients with low CBX2 mRNA expression was significantly longer than that of patients with high CBX2 mRNA expression [(5.971 ± 0.411) years vs. (4.650 ± 0.503) years, P = 0.001]. The expression level of CBX2 mRNA was correlated with the pathological TNM stage (P = 0.025) and differentiation degree (P < 0.001) of liver cancer. COX regression analysis showed that CBX2 mRNA expression was an independent predictor of patient survival (P = 0.013). siRNA was transfected and compared with the blank control group. The transgenic ability of HepG2 and SMMC-77221 cells decreased significantly at 72h (P < 0.05) and 96h (P < 0.05), and the apoptosis rate (11.430% ± 0.215%) was higher than blank control group (6.6 00% ± 0.170%) (P = 0.003). The number of invasive cells ((both P < 0.05) and relative colony forming cells ((both P < 0.001) were significantly decreased. In 20 cases of tissue samples, the expression of CBX2 protein (relative expression level 3.020 ± 0.269) in liver cancer was higher than that in adjacent tissues (relative expression level 0.886±0.065) (P < 0.001). The overall survival time of patients with low CBX2 expression in liver cancer was longer than that of patients with high expression [(3.670 + 0.576) years vs. (0.834 + 0.153) years, P = 0.004]. Conclusion: An evident high expression of CBX2 is an independent poor prognostic factor in hepatoma. Down-regulation of CBX2 expression can inhibit the progression of liver cancer. Therefore, CBX2 may be a prognostic biomarker and a new target for HCC treatment.
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Affiliation(s)
- J Li
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Precision Medicine Center, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Z X Guo
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - J A Chen
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - C Xue
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - L L Sun
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Z G Ren
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - A Li
- Precision Medicine Center, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - G Y Cui
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Z J Yu
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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Zheng CF, Zeng H, Wang J, Lin H, Feng XB, Chen JA, Qiu ZQ, Luo JH, Xu AW, Wang LQ, Tan Y, Chen S, Jiang P, Shu WQ. [The association between aflatoxin exposure and primary hepatocellular carcinoma risks: a case-control study in Chongqing]. Zhonghua Yu Fang Yi Xue Za Zhi 2017; 51:539-545. [PMID: 28592100 DOI: 10.3760/cma.j.issn.0253-9624.2017.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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 association between aflatoxin exposure and primary hepatocellular carcinoma (PHC) development. Methods: From December 2013 to May 2016, we selected 214 patients newly diagnosed with PHC as cases, and 214 patients as controls from three hospitals in Chongqing. Cases were confirmed with PHC diagnosis standard. And cases caused by clear reasons such as drug-induced liver injury, alcoholic liver damage, fatty liver and gallstones etiology, were excluded. Controls were included with no cancer and no digestive system disease, and recruited simultaneously with cases. Cases and controls were frequency-matched (1∶1) by same gender and age (±3 years). Peripheral blood and random urine samples were collected and analyzed for serum HBsAg status by biochemistry analyzer, and serum AFB(1)-ALB adduct and urinary AFB(1)-N(7)-GUA adduct by ELISA. Basic information, living habits and history of disease for patients were obtained by questionnaires. We used wilcoxon rank sum test to compare the median of serum AFB(1)-ALB adduct and urinary AFB(1)-N(7)-GUA adduct in cases and controls. Logistic regression analyses were performed to assess risk factors for PHC, and synergism index (S) of aflatoxin with other factors was estimated by the method of Andersson. Results: There was no significant difference in age between PHC cases (50.74±9.67) years and controls (51.15±9.90) years. Logistic regression showed that the odds ratio of HBV infection for PHC development was 46.3 (95% CI: 23.3-88.0). There was a significant difference in median concentrations of serum AFB(1)-ALB adduct (cases vs controls: 146.23 vs 74.42 ng/g albumin, P<0.001), but no difference in median concentrations of urinary AFB(1)-N(7)-GUA adduct was observed (cases vs controls: 0.17 vs 0.14 ng/mg creatinine, P<0.210). The odd ratios for PHC risk after adjustment were 1.9 (95%CI: 1.1-3.4) for AFB(1)-ALB adduct, and 2.1 (95%CI: 1.0-4.2) for AFB(1)-N(7)-GUA adduct. Moreover, we observed a positive interaction of aflatoxin exposure with HBV, alcohol drinking, and diabetes. The S was 4.7 (95%CI: 2.8-7.9), 3.5 (95%CI: 1.0-12.0), and 12.4 (95%CI: 1.8-84.2), respectively for serum AFB(1)-ALB adduct with each of the three factors mentioned, and was 1.9 (95%CI:1.1-3.1), 2.0 (95%CI: 1.1-3.6), and 2.0 (95%CI: 1.1-3.6), respectively for urinary AFB(1)-N(7)-GUA adduct with each of the three factors mentioned. Conclusion: HBV was still the main risk factor, and AFB(1) exposure was also an independent risk factor for PHC in Chongqing. There was a positive interaction of aflatoxin with HBV, alcohol drinking, and diabetes.
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Affiliation(s)
- C F Zheng
- Department of Environmental Hygiene, College of Preventive Medicine, Third Military Medical University, Chongqing 400038, China
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Chen JA, Chang LR, Feng GM, Lee ST, Hsieh CY, Jeng SF, Huang WS. Stress alters the expression of aquaporins in cultured rat intestinal epithelial cells. Exp Ther Med 2015; 10:1967-1972. [PMID: 26640581 DOI: 10.3892/etm.2015.2771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 09/01/2015] [Indexed: 12/24/2022] Open
Abstract
Aquaporins (AQPs) are widely-expressed small water channel proteins that provide the major route for water transport across plasma membranes in various cell types. Although the quantity of water transported in the intestinal tract is second only to that in the kidney, the precise role of AQPs in this organ remains largely uncertain. The present study reports the effects of hypertonic stress and ischemia/reperfusion injury on the expression of AQPs in intestinal epithelial cells. Cultured rat intestinal epithelial cells were incubated in 300 mM mannitol-containing, hypertonic culture medium or subjected to simulated ischemia/reperfusion treatment. The cell viability was evaluated by MTT assay, and the expression of AQPs was determined by semi-quantitative reverse transcription polymerase chain reaction and western blotting. Despite reduced viability, the cells exposed to hypertonic stress for 16 h demonstrated enhanced expression of AQP1 mRNA and protein. AQP9 and glycosylated AQP11 proteins were also markedly upregulated. Ischemia alone did not affect the cell viability, but subsequent reperfusion significantly reduced viability. The mRNA expression levels of all the tested AQPs were not altered by ischemia alone or by ischemia/reperfusion; however, AQP8 protein was markedly reduced by ischemic injury. In addition, treatment with ischemia alone eradicated the normally-expressed, non-glycosylated AQP11 protein whilst inducing pronounced expression of the glycosylated form. These observations may indicate that AQPs function in the intestinal epithelia in response to stress.
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Affiliation(s)
- Jian-An Chen
- Division of Plastic Surgery, Kaohsiung Armed Forces General Hospital, Kaohsiung 802, Taiwan, R.O.C. ; Department of Plastic Surgery, E-DA Hospital, Kaohsiung 824, Taiwan, R.O.C
| | - Li-Ren Chang
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung 824, Taiwan, R.O.C
| | - Guan-Ming Feng
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung 824, Taiwan, R.O.C
| | - Shu-Ting Lee
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung 802, Taiwan, R.O.C
| | - Chien-Yan Hsieh
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung 802, Taiwan, R.O.C
| | - Seng-Feng Jeng
- Department of Plastic Surgery, E-DA Hospital, Kaohsiung 824, Taiwan, R.O.C
| | - Wen-Shyan Huang
- Division of Plastic Surgery, Kaohsiung Armed Forces General Hospital Zuoying Branch, Kaohsiung 813, Taiwan, R.O.C. ; Department of Surgery, National Defense Medical Center, Taipei 114, Taiwan, R.O.C
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Josephson DY, Chen JA, Chan KG, Lau CS, Nelson RA, Wilson TG. Robotic-assisted laparoscopic radical cystoprostatectomy and extracorporeal continent urinary diversion: highlight of surgical techniques and outcomes. Int J Med Robot 2010; 6:315-23. [PMID: 20564428 DOI: 10.1002/rcs.335] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- D Y Josephson
- Department of Urology and Urologic Oncology, City of Hope, Duarte, CA 91010, USA.
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12
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Shih LJ, Lu YF, Chen YH, Lin CC, Chen JA, Hwang SPL. Characterization of the agr2 gene, a homologue of X. laevis anterior gradient 2, from the zebrafish, Danio rerio. Gene Expr Patterns 2006; 7:452-60. [PMID: 17175205 DOI: 10.1016/j.modgep.2006.11.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2006] [Revised: 10/23/2006] [Accepted: 11/06/2006] [Indexed: 01/23/2023]
Abstract
We characterized a zebrafish (Danio rerio) anterior gradient 2 homologue (agr2) gene. agr2 contains an open reading frame of 513bp encoding 171 amino acids. Deduced amino acid sequence comparison showed that the zebrafish agr2 protein shares high (80-89%) amino acid sequence similarity with those homologues of anterior gradient 2 (HAGR2, MAgr2, Tagr2, and Sagr2) from the human, mouse, pufferfish, and Atlantic salmon, while sharing less (67-71%) sequence similarity with those anterior gradient 2 genes (XAG-2, XAG-1, XAgr2, MAgr3, and HAGR3) from Xenopus laevis, mouse, and human. Both phylogenetic and syntenic analyses indicate that zebrafish agr2 is the orthologue of human AGR2 and mouse Agr2 genes. Whole-mount in situ hybridization indicated that zebrafish agr2 is expressed in most organs, such as epidermis, olfactory bulbs, otic vesicles, pharynx, esophagus, pneumatic duct, swim bladder, and intestine, which contain mucus-secreting cells. Moreover, semi-quantitative RT-PCR demonstrated agr2 is expressed in the gill, pharynx/esophagus, swim bladder/pneumatic duct, and intestine in the adult fish. In contrast, Xenopus anterior gradient 2 homologues are mainly expressed in ectoderm-derived organs including the cement gland and otic vesicles, while human and mouse anterior gradient 2 orthologues are mainly distributed in endoderm-derived organs including the trachea, lungs, stomach, intestines, and colon.
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Affiliation(s)
- Li-Jane Shih
- Institute of Cellular and Organismic Biology (formerly the Institute of Zoology), Academia Sinica, Nankang, Taipei 115, Taiwan, ROC
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13
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Chen JA, Lai JL, Lee GH, Wang Y, Su JK, Yeh HC, Lin WY, Leung M. Cooperative and selective lithium complexation of 2,11,13,22-tetraaza-5,8,16,19- tetraoxa-1,12-dioxocyclodocosanes. Org Lett 2001; 3:3999-4002. [PMID: 11735569 DOI: 10.1021/ol010189z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Ureyleno crown ethers 2 and 3 bind with 2 equiv of Li(+) cooperatively and selectively over other alkali metal ions such as Na(+), K(+), and Cs(+). The binding constant for 3 was found to be 3.0 x 10(7) (L/mol)(2).
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Affiliation(s)
- J A Chen
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
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14
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Tang CT, Chen JA, Tang L, Cui GW, Qian YC, Kang YM, Lu HC. [Comparison observation on the mature alveolar of Echinococcus sibiricensis and Echinococcus multilocularis in the experimentally infected white mice]. Shi Yan Sheng Wu Xue Bao 2001; 34:261-8. [PMID: 12549203] [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: 02/28/2023]
Abstract
The alveolar echinococcus is one of the most dangerous worm parasites in man. Rausch and Schiller reported a new species, Echinococcus sibiricensis n. sp. from arctic fox, Alpex logopus, on St. Lawrence Island of Alaska, USA. According to the view of Vogel, the sibiricensis form is only a geographical race or subspecies of Europe Echinococcus multilocularis. So far, the two names, Echinococcus multiocularis multilocularis and Echinococcus multilocularis sibiricensis, existed in many references and text books. We have found the adults of Echinococcus sibiricensis and Echinococcus multilocularis from sand foxes, Vulpes corsac and their larval stages (alveolar echinococcus) from field voles, Microtus brandti in the Hulunbeier Pasture of Inner Mongolia, northeastern China in 1985 and 1998-1999. Two types of metacestodes with quite different styles of early development of E. sibiricensis and E. multilocularis were found from field voles and laboratory experimental white mice. As one characteristic of alveolar E. multilocularis, the capsules are produced by the exogenous budding of germinal cell layer together with cyst wall. The protoscoleces grow from germinal cells on germinal cell layer. The peduncles of early protoscoleces attached to the germinal cell layer on the inner surface of capsule wall(Plate I, Figs. 1-2). Some protoscoleces in reticular structure were linked with the inner surface of capsule wall (Plate I, Fig. 3) in livers of mice in 9.5th month postinfection. In 14th month old alveolar multilocularis, large number of mature protoscoleces in reticular structure were still linked to the inner surface of capsule wall (Plate I, Figs. 4-8). The cavities of some capsules were filled with protoscoleces in meshes of reticular structure which were also linked around with the inner surface of capsule wall (Plate I, Fig. 9). The superficial surface of livers of positive field voles and experimental mice never showed any hyperemic phenomenon. The superficial surfaces of livers and lungs of positive field voles and experimental mice infected with alveolar E. sibiricensis were highly hyperemic. The metacestodes of E. sibiricensis composed of mother cyst, undifferentiated embryonic cysts and small brood capsules. Cavities of all cysts were fully filled with germinal cell masses. Host reaction appeared to be very strong, all cysts were surrounded by thick connective tissue and dense leukocytes (Plate II, Fig. 10). All alveolar vesicles were found located in lungs tissue of experimental mice. Large germinal cell masses metastasized out from undifferentiated embryonic cysts into host lung tissue, where germinal cell masses developed into accumulation of early protoscoleces (Plate II, Figs. 11-12). Early protoscoleces of alveolar E. sibiricensis were seen earliest in mice lung tissues on 101-104th days after infection. Many small capsules in different sizes and different shapes containing mature protoscoleces and reticular structure (Plate II, Figs. 13-15) were found in lungs of mice in 9th month after infection. Only in one experimental mouse infected with alveolar E. sibiricensis in 8.5th month postinfection, both its lung and liver existed alveolar cysts; the capsules in liver were surrounded by very thick connective tissue of the host, and there were some protoscoleces in their cavities (Plate II, Figs. 16-18).
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Affiliation(s)
- C T Tang
- Parasitology Research Laboratory, Xiamen University, Xiamen 361005, China
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15
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Liao CF, Lai JL, Chen JA, Chen HT, Cheng HL, Her GR, Su JK, Wang Y, Lee GH, Wang CC. Proton-lithium binding behavior of tris(2-((pyrid-2-ylmethyl)uredio)ethyl)amine. J Org Chem 2001; 66:2566-71. [PMID: 11304172 DOI: 10.1021/jo001221q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tris(2-((pyrid-2-ylmethyl)uredio)ethyl)amine (2) and its perchlorate salt, 2.HClO(4), bind with Li+ in nitromethane in a 1:1 fashion. The stability constants of K(Li+) and K(H)(Li+) were found to be 112 +/- 25 and 130 +/- 30 M(-)(1) in CD(3)NO(2), respectively. Formation of the 1:1 complexes were further evidenced by electrospray ionization mass spectrometry (ESI-MS). The slight increase, or at least the same order of magnitude, of K(H)(Li+) compared to K(Li+) points to a remarkable preorganization of the protonated podand in 2.HClO(4), that essentially overcomes the increased Columbic repulsion occurring on complexation to Li+.
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Affiliation(s)
- C F Liao
- Department of Chemistry, Soochow University, Taipei, Taiwan, R.O.C
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16
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Nusrat A, Chen JA, Foley CS, Liang TW, Tom J, Cromwell M, Quan C, Mrsny RJ. The coiled-coil domain of occludin can act to organize structural and functional elements of the epithelial tight junction. J Biol Chem 2000; 275:29816-22. [PMID: 10887180 DOI: 10.1074/jbc.m002450200] [Citation(s) in RCA: 159] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Occludin is an integral membrane protein that has been suggested to play a role in the organization and dynamic function of the epithelial tight junction (TJ). A number of other proteins have also been described to localize to the TJ. We have used a novel bait peptide method to investigate potential protein-protein interactions of the putative coiled-coil domain of occludin with some of these other TJ proteins. A 27-amino acid peptide of the human occludin sequence was synthesized, biotinylated at the N terminus, and modified to contain a photoactive moiety at either its hydrophobic or hydrophilic surface. These bait peptides were alpha-helical in solution, characteristic of coiled-coil structures. Photoactivation studies in the presence and absence of control peptides were used to assess the potential interactions in polarized sheets of a human intestinal cell line T84. Although a large number of proteins associated with the TJ or that are known to be involved in regulatory events of epithelial cells failed to be specifically labeled, occludin itself, ZO-1, protein kinase C-zeta, c-Yes, the regulatory subunit of phosphatidylinositol 3-kinase, and the gap junction component connexin 26 were specifically labeled. Our data demonstrate the potential of one specific domain of occludin, contained within 27 amino acids, to coordinate the binding of proteins that have been previously suggested to modulate TJ structure and function.
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Affiliation(s)
- A Nusrat
- Epithelial Pathobiology Research Unit, Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia 30322, USA
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Abstract
Progress in elucidating the pathogenesis of Helicobacter pylori gastric infection and in developing an H. pylori vaccine will be aided by an animal model in which H. pylori can be reliably detected. To validate the use of the mouse model of H. pylori infection, we determined the susceptibility of three inbred strains of mice (C57BL/6J, C57BL/10J and BALB/c) to two VacA+/CagA+ isolates of H. pylori (SPM326 and M1.16) and determined the effectiveness of microbiological, histological and molecular assays for H. pylori detection. For the detection of H. pylori in inoculated mice, reverse transcriptase-polymerase chain reaction was the most sensitive assay (82%), histological evaluation the next most sensitive (66%) and microbiological evaluation the least sensitive (38%); the assays were equally specific (100%). Of the two H. pylori isolates, M1.16 showed the highest rate of colonization, but SPM326 displayed the highest rate of persistent infection. Among the three mouse strains, C57BL/6J mice showed the highest level of both susceptibility to colonization and persistent infection. Anti-H. pylori antibody responses were induced in all inoculated mice and persisted for up to 8 weeks after H. pylori clearance. These results indicate that inbred mice experimentally infected with H. pylori is a reliable model for human infection, but host susceptibility to colonization and persistence of infection are dependent on the H. pylori isolate and the mouse strain.
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Affiliation(s)
- L E Smythies
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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Hu CK, Chen JA, Izmailian NS, Kleban P. Geometry, thermodynamics, and finite-size corrections in the critical Potts model. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1999; 60:6491-5. [PMID: 11970564 DOI: 10.1103/physreve.60.6491] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/1999] [Revised: 07/06/1999] [Indexed: 04/18/2023]
Abstract
We establish an intriguing connection between geometry and thermodynamics in the critical q-state Potts model on two-dimensional lattices, using the q-state bond-correlated percolation model (QBCPM) representation. We find that the number of clusters <N(c)> of the QBCPM has an energy-like singularity for q not equal to 1, which is reached and supported by exact results, numerical simulation, and scaling arguments. We also establish that the finite-size correction to the number of bonds, <N(b)>, has no constant term and explains the divergence of related quantities as q-->4, the multicritical point. Similar analyses are applicable to a variety of other systems.
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Affiliation(s)
- C K Hu
- Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan.
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19
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Abstract
An efficient cardiac gene transfer technique in murine models would greatly facilitate the elucidation of the pathophysiology of cardiomyopathies and the development of genetic therapies. Direct myocardial injection or catheter-based intracoronary infusion is not easily achievable in mice and resultant transgene expression is often limited in distribution. A replication-defective, recombinant adenovirus encoding luciferase (5x10(9)pfu) or lacZ (4-5x10(10)particles/animal) was injected percutaneously into the pericardial cavity of 4-5 day old mice. Chemiluminescence assay for luciferase activity at 3 days post-injection revealed the highest activity in the heart (heart=288+/-110, lungs=19+/-5, liver=11+/-5 ng/gm tissue, n=11). X-gal staining of cryostat sections demonstrated widespread transmural lacZ expression in the left ventricle, interventricular septum, right ventricle, and atrial appendages, and the average fractional area of X-gal staining in a left ventricle was 66+/-16% (range 40-92%, n=21 sections). However, the long-term survival of these mice was compromised. Reduction in the injectate volume by 50% significantly improved survival but concurrently reduced lacZ expression. Significant lacZ expression was observed in the right ventricle and interventricular septum but left ventricular expression was predominantly epicardial, with variable myocardial penetration. At 2 months post-injection, lacZ expression persisted only in atrial tissues, pulmonary veins, and great vessels. Despite lack of persistent transgene expression in ventricular tissues, the high degree of transgene expression achieved may be sufficient to allow evaluation of short-term effects of specific genetic manipulations in the heart.
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Affiliation(s)
- J C Zhang
- Department of Medicine, Division of Cardiovascular Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6100, USA
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Abstract
Seventy DSM-III schizophrenic patients were assessed for positive and negative symptoms using Andreasen's scales for the assessment of positive and negative symptoms (SANS and SAPS) on admission. The correlation structure of the items in the SANS and SAPS was explored in dimension and item levels by use of correlation plots through a distinct analytical method displaying the proximity matrix. The results revealed at least three major dimensions of symptoms delineated as Negative Symptoms, Disorganized Thoughts and Delusions and Hallucinations. The latter two dimensions were derived from the SAPS, while Negative Symptoms comprised most of the items in the SANS. Items in Disorganized Thoughts were more correlated to Negative Symptoms than to the other items in the SAPS. 'Loss of ego boundary' delusions and experience of auditory hallucinations appeared as two sub-clusters in the group of Delusions and Hallucinations. The relative independence of persecutory, grandiose, religious, somatic and reference delusions gives support to the concept that paranoid schizophrenia stands as a distinct clinical subtype of schizophrenia. The graphical method introduced here well expresses the information of correlation matrix and is useful for exploring inter-item or inter-cluster associations.
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Affiliation(s)
- A S Lin
- Taipei City Psychiatric Center, Taipei, Taiwan, Peoples Republic of China
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Hwang JC, Chen JA, Fung HY. Hemodialysis alternative with ascites ultrafiltration for an end-stage renal failure patient associated with tense ascites secondary to decompensated liver cirrhosis. Am J Kidney Dis 1996; 28:899-903. [PMID: 8957043 DOI: 10.1016/s0272-6386(96)90391-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Patients with end-stage renal disease combined with tense ascites caused by decompensated liver cirrhosis are sometimes encountered in a hemodialysis center. A big problem for the management of these patients is the tendency of hypotension during ultrafiltration. Subsequent fluid accumulation, especially in the abdominal cavity, causes breathing difficulty and abdominal discomfort. We present a new technique, ascites ultrafiltration, to solve this problem. Using the same equipment as for ordinary hemodialysis, and incurring the same cost, we removed directly approximately 8 L of ascites fluid during each nearly 4-hour session. No hemodynamic instability was noted. We proved this technique to be an effective and safe alternative method for this group of patients.
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Affiliation(s)
- J C Hwang
- Division of Nephrology, Chi-Mei Foundation Hospital, Tainan, Taiwan
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23
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Yang ST, Tsai CH, Chen JA, Chiang HJ. Differential diagnosis between intussusception and gastroenteritis by plain film. Zhonghua Min Guo Xiao Er Ke Yi Xue Hui Za Zhi 1995; 36:170-5. [PMID: 7618466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND The objective of this study is to reassess the validity of plain film diagnosis for pediatric intussusception with consideration of the combinations of radiologic findings. METHODS Sixty-six cases of intussusception and 81 controls of gastroenteritis were collected. Their films were read blindly by three radiologists together, with emphasis on nine radiologic findings: sparse colon gas (F1), sparse fecaloid content in colon (F2), gas-filled small bowel loops in right hypochondrium (F3), small bowel obstruction (F4), difficulty in assessing cecum position (F5), pneumoperitoneum (F6), discernible mass lesion (F7), target sign (F8) and crescent sign (F9). The sensitivity and specificity of individual findings and combinations of findings were analyzed. RESULTS No cases showed F6. Listed in decreasing order of sensitivity, the other eight findings were F1, F5, F2, F7, F3, F4, F9 and F8. The sensitivity and specificity of these eight findings were inversely proportional with significant p-values (F8: < 0.005; the other seven findings: < 0.001). Sixty-three films (95%) in case group displayed combination of at least three radiologic findings. If the diagnostic criteria must consist of at least three radiologic findings, 60 cases (74%) of control group can be excluded. CONCLUSIONS After eliminating the confounding effect of small bowel obstruction on the percentage of gas-filled small bowel loops in right hypochondrium and excluding the data agreed by only one radiologist from the study by Ratcliffe et al, the results of plain film findings were consistent with those of previous reports. The plain abdominal film can play an active role in the diagnosis of pediatric intussusception. Its validity increases when combinations of radiologic findings rather than individual signs are emphasized.
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Affiliation(s)
- S T Yang
- Department of Radiology, China Medical College Hospital, Taichung, Taiwan
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Lai PY, Chen JA. Stretch transition in a polymer brush. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1995; 51:2272-2276. [PMID: 9962888 DOI: 10.1103/physreve.51.2272] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Honda M, Takasaki E, Suzuki T, Maeda S, Imai T, Hosoya Y, Chen JA. [Clinical evaluation of chemohormonal therapy as an initial treatment for stage D2 prostatic cancer--effect of UFT administration combined with hormonal therapy]. Gan To Kagaku Ryoho 1995; 22:105-9. [PMID: 7826063] [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: 01/27/2023]
Abstract
We evaluated the usefulness of hormonal therapy combined with UFT as initial treatment in comparison with hormonal therapy alone in 92 patients with Stage D2 prostatic cancer treated at the Department of Urology, Dokkyo University School of Medicine between 1974 and 1993. Twenty-six of these patients were treated with diethylstilbestrol diphosphate (DESP) and castration (hormonal therapy alone group), and 23 patients were treated with UFT, DESP and castration (UFT combined therapy group). The 5-year survival rates calculated with Kaplan-Meier's method in the hormonal therapy alone group and the UFT combined therapy group were 34.6 % and 38.3%, respectively. However, the 3-year survival rates of pathologically poorly differentiated adenocarcinoma in these groups were 30.0% and 50.0%, respectively. Based on these results, it was suggested that UFT administration combined with hormonal therapy is useful for pathologically poorly differentiated adenocarcinoma in Stage D2 prostatic cancer.
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Affiliation(s)
- M Honda
- Dept. of Urology, Dokkyo University School of Medicine
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Chen JA, Hu CK. Histogram-importance-sampling Monte Carlo method for the q-state Potts model. Phys Rev B Condens Matter 1994; 50:6260-6263. [PMID: 9977001 DOI: 10.1103/physrevb.50.6260] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Chen JA. [Comparison of the therapeutic effect of CMxMF and CAMF regimens in the management of advanced breast cancer patients]. Zhonghua Zhong Liu Za Zhi 1993; 15:202-4. [PMID: 8261866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
From April 1990 to April 1992, a comparative study was carried out in 46 patients with advanced breast cancer treated by CMxMF (Cyclophosphamide, mitoxantrone, methotrexate, 5-fluorouracil) and CAMF regimens (Cyclophosphamide, adriamycin, methotrexate, 5-fluorouracil). Of these 46 patients, 23 treated by CMxMF regimen gave a response rate of 87% (20/23) and 23 treated by CAMF regimen gave a response rate of 82.6% (19/23) (P > 0.05). Following up to the end of June, 1992, 21 patients in CMxMF regimen were still alive with a median survival of 16 (6-24) months and 20 patients in CAMF regimen with a median survival of 12 (3-24) months. The side effects were tolerable in both groups. The authors consider that mitoxantrone is as effective as adriamycin in the treatment of advanced breast cancer.
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Affiliation(s)
- J A Chen
- First People's Hospital, Xiang-tan municipality, Hunan Province
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Abstract
For 18 years treatment with lindane or crotamiton products has failed to stem the epidemic of scabies among the Kuna Indians in the San Blas islands of the Republic of Panama. Permethrin 5% cream was introduced as the only treatment in a programme to control scabies on an island of 756 inhabitants and involving workers recruited locally. Prevalence fell from 33% to less than 1% after every person was treated. As long as continued surveillance and treatment of newly introduced cases was maintained, prevalence of scabies remained below 1.5% for over 3 years. When supply of medication was interrupted for 3 weeks, prevalence rose to 3.6%. When control was lost after the US invasion of Panama, prevalence rose to 12% within 3 months. Bacterial skin infections decreased dramatically when scabies was controlled. Permethrin is safe and effective even in areas where this disease has become resistant to lindane.
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Affiliation(s)
- D Taplin
- Department of Dermatology and Cutaneous Surgery, University of Miami School of Medicine, Florida
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Liu Y, Chen JA, Han JD, Xu YX, Luo L, Xu CT, Zhang YP. [Effect of capsaicin on the release of substance P from spinal cord and blood pressure]. Sheng Li Xue Bao 1990; 42:446-52. [PMID: 1703663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The role of substance P (SP) in the regulation of sympathetic outflow to the cardiovascular system was assessed. Intrathecal injection(ith) of capsaicin caused a release of SP from the spinal cord and resulted in an increase in blood pressure and heart rate accompanied by an elevation of plasma adrenaline and noradrenaline. This pressor response was blocked by ith SP antagonist D-Pro2, D-Phe7, D-Trp9-SP or antiserum against SP. The immunohistochemical study showed that the SP-like immunoreactivity in T-8 of the spinal cord was decreased as the amount of capsaicin administrated was increased. Spinal cord transection had no effect on pressor responses caused by ith 10 micrograms capsaicin. These results suggest that SP transmits excitatory information to the cardiovascular system via spinal sympathetic pathway.
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Affiliation(s)
- Y Liu
- Department of Physiology, Peking Union Medical College, Beijing
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Abstract
Permethrin 5% cream (Elimite) was approved as a treatment for scabies by the U.S. Food and Drug Administration in September 1989. In a double-blinded, randomized study, it was compared with crotamiton 10% cream (Eurax) for the treatment of scabies in children 2 months to 5 years of age. Two weeks after a single overnight treatment, 14 (30%) of 47 children were cured with permethrin 5% cream, in contrast to only 6 of 47 (13%) of subjects treated with Eurax. Four weeks after treatment the figures were 89% and 60% cured for the two agents, respectively. In 10 of the 19 patients whose treatment failed, the condition became worse after therapy. The difference in efficacy in favor of permethrin was significant (P = 0.002). That agent also demonstrated greater effectiveness in reducing pruritus and secondary bacterial infections. Elimite offers a safe, efficacious, and cosmetically elegant alternative to Eurax in the treatment of scabies in children.
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Affiliation(s)
- D Taplin
- Department of Dermatology and Cutaneous Surgery, University of Miami School of Medicine, FL 33101
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Chen ZX, Lü DS, Wang BL, Xu H, Wang JQ, Chen JA, Zhang LH, Yang CP. [A survey on Campylobacter jejuni high infection in a nursery]. Hua Xi Yi Ke Da Xue Xue Bao 1989; 20:445-7. [PMID: 2698371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An epidemiologic survey on Campylobacter jejuni infection in a nursery was made in April 1987. It was found that there was a spread of C. jejuni high infection. Two cooks affected by enteritis of C. jejuni were considered to be a reservoir of the infection. Stool cultures were positive for C. jejuni in 43 out of 187 children, with a positive rate of 23%. Eight of the 43 had diarrhea and the others were asymptomatic carriers (24.3%). Controls were set up in another nursery with 238 healthy children and 201 non-diarrheal outpatients; C. jejuni was positive for 11.4% and 7.5%, respectively. The difference was quite significant (P less than 0.005). Results of biotyping on the strains isolated from the two cooks and the children in the nursery showed that all were of C. jejuni biotype 1, except two (4.7%) of the strains from the children, which were E. coli. The authors have suggested that transmission of C. jejuni in the nursery may be caused by contaminated food or person-to-person contact.
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Zhang XY, Wu RJ, Chen JA, An DK. Determination of glycyrrhizin and its metabolite glycyrrhetinic acid in rabbit plasma by high-performance liquid chromatography after oral administration of licorzin. J Chromatogr 1989; 495:343-8. [PMID: 2613821 DOI: 10.1016/s0378-4347(00)82643-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- X Y Zhang
- Department of Pharmacy, Xinjiang Medical College, Urumchi, China
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Chen JA. [The role of substance P and catecholamine in the mechanism of pressor response elicited by application of kainic acid to the rostral ventral surface of the medulla oblongata in rat]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1989; 11:215-9. [PMID: 2478307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Application of kainic acid (KA) to the rostral ventral surface of the medulla oblongata (RVM) produced an increase in mean arterial pressure, accompanied by a decrease in substance P-like immunoreactivity in both spinal cord and medulla oblongata and an elevation of plasma adrenaline (AD) and noradrenaline (NA) content. There were no significant changes in the amounts of AD and NA in other areas of the central nervous system. These responses were effectively abolished by pre-intrathecal injection of D-pro2, D-phe7 or D-Trp8-SP. These results suggest that the pressor responses evoked by activation of RVM might be mediated by a substance P (SP)-containing bulbospinal pathway rather than by a central catecholamine system. SP transmits excitatory information from RVM to the peripheral vasculature via the spinal sympathetic adrenal medulla system, which plays an important role in maintaining vasomotor tone.
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Lu DS, Chen ZX, Wang BL, Xu H, Chen JA, Wang JQ, Zhang LH. [Survey of Campylobacter jejuni/coli infection and risk factors in children]. Hua Xi Yi Ke Da Xue Xue Bao 1989; 20:74-6. [PMID: 2793148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
From March to May 1987, 798 children under 7 years of the outpatients in Chengdu district were examined and their stool samples cultured for Campylobacter jejuni/coli. C. jejuni/coli was isolated from 31 (9.51%) of 326 children with diarrhea and 22 (4.66%) of 472 children with non-diarrhea. The difference was significant (P less than 0.05). This result indicated that C. jejuni/coli is an important pathogen of children diarrhea in Chengdu district. Meanwhile, by inquiry we investigated risk factors related with C. jejuni/coli infections. Case group was consisted of 53 children with C. jejuni/coli positive. For each case, 3 controls were chosen from 745 children with C. jejuni/coli negative and matched according to age (less than 6 month), sex, living place (city or countryside), way of feeding, and whether to have diarrhea or not. The results has shown that contact with animals a week before being ill and habit of intake of food with hands are risk factors of C. jejuni/coli infection of childhood in Chengdu, with an odd ratio of 2.97 and 2.71 respectively. This provides valuable information about the prevention of C. jejuni/coli infection.
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Tyan YS, Shyu SF, Chen JA, Shen WC, Ka MJ. Computed tomographic findings of a high jugular bulb with bony dehiscence. Zhonghua Yi Xue Za Zhi (Taipei) 1987; 40:341-4. [PMID: 3502853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Abstract
Permethrin 5% dermal cream (Burroughs Wellcome Co.) was compared in an investigator-blinded, randomized study against lindane 1% lotion (Kwell) for the treatment of microscopically confirmed scabies. Eleven of twenty-three patients treated with permethrin cream were cured in 2 weeks (48%). Only two patients had scabies 1 month following a single treatment with this product, giving a cure rate of 91%. One of these two patients was considered to have a reinfestation. Only three of twenty-three (13%) patients treated with 1% lindane lotion (Kwell) were free of scabies 2 weeks after a single treatment and fifteen of twenty-three (65%) were cured at 1 month. The unusually high percentage of treatment failures (35%) following lindane therapy may have been related to extensive use of this agent for head lice and scabies in this village during the preceding 5 years. The higher cure rate at 1 month seen with permethrin cream was significant (p less than 0.025). Permethrin 5% dermal cream offers a new, cosmetically elegant alternative to lindane therapy and was effective in a community in which lindane demonstrated an unacceptable level of treatment failures.
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