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Zhao H, Zhang L, Deng T, Li C. Microfluidic Sensing Textile for Continuous Monitoring of Sweat Glucose at Rest. ACS Appl Mater Interfaces 2024; 16:19605-19614. [PMID: 38568178 DOI: 10.1021/acsami.4c01912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Wearable sweat sensors have received considerable attention due to their great potential for noninvasive continuous monitoring of an individual's health status applications. However, the low secretion rate and fast evaporation of sweat pose challenges in collecting sweat from sedentary individuals for noninvasive analysis of body physiology. Here, we demonstrate wearable textiles for continuous monitoring of sweat at rest using the combination of a heating element and a microfluidic channel to increase localized skin sweat secretion rates and combat sweat evaporation, enabling accurate and stable monitoring of trace amounts of sweat. The Janus sensing yarns with a glucose sensing sensitivity of 36.57 mA cm-2 mM-1 are embroidered into the superhydrophobic heated textile to collect sweat directionally, resulting in improved sweat collection efficiency of up to 96 and 75% retention. The device also maintains a highly durable sensing performance, even in dynamic deformation, recycling, and washing. The microfluidic sensing textile can be further designed into a wireless sensing system that enables sedentary-compatible sweat analysis for the continuous, real-time monitoring of body glucose levels at rest.
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Affiliation(s)
- He Zhao
- Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Ling Zhang
- Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Tianbo Deng
- Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Chunzhong Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
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Zou Y, Yan XL, Flores RM, Zhang LY, Yang SP, Fan LY, Deng T, Deng XJ, Ye DQ. Source apportionment and ozone formation mechanism of VOCs considering photochemical loss in Guangzhou, China. Sci Total Environ 2023; 903:166191. [PMID: 37567293 DOI: 10.1016/j.scitotenv.2023.166191] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Understanding the sources and impact of volatile organic compounds (VOCs) on ozone formation is challenging when the traditional method does not account for their photochemical loss. In this study, online monitoring of 56 VOCs was carried out in summer and autumn during high ozone pollution episodes. The photochemical age method was used to evaluate the atmospheric chemical loss of VOCs and to analyze the effects on characteristics, sources, and ozone formation of VOC components. The initial concentrations during daytime were 5.12 ppbv and 4.49 ppbv higher than the observed concentrations in the summer and autumn, respectively. The positive matrix factorization (PMF) model identified 5 major emission sources. However, the omission of the chemical loss of VOCs led to underestimating the contributions of sources associated with highly reactive VOC components, such as those produced by biogenic emissions and solvent usage. Conversely it resulted in overestimating the contributions from VOC components with lower chemical activity such as liquefied petroleum gas (LPG) usage, vehicle emissions, and gasoline evaporation. Furthermore, the estimation of ozone formation may be underestimated when the atmospheric photochemical loss is not taken into account. The ozone formation potential (OFP) method and propylene-equivalent concentration method both underestimated ozone formation by 53.24 ppbv and 47.25 ppbc, respectively, in the summer, and by 40.34 ppbv and 26.37 ppbc, respectively, in the autumn. The determination of the ozone formation regime based on VOC chemical loss was more acceptable. In the summer, the ozone formation regime changed from the VOC-limited regime to the VOC-NOx transition regime, while in the autumn, the ozone formation regime changed from the strong VOC-limited regime to the weak VOC-limited regime. To obtain more thorough and precise conclusions, further monitoring and analysis studies will be conducted in the near future on a wider variety of VOC species such as oxygenated VOCs (OVOCs).
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Affiliation(s)
- Y Zou
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Institute of Tropical and Marine Meteorology, China Meteorological Administration (CMA), Guangzhou 510640, China
| | - X L Yan
- State Key Laboratory of Severe Weather & Institute of Tibetan Plateau Meteorology, Chinese Academy of Meteorological Sciences, Beijing, China
| | - R M Flores
- Marmara University, Department of Environmental Engineering, Istanbul, Turkey
| | - L Y Zhang
- Institute of Tropical and Marine Meteorology, China Meteorological Administration (CMA), Guangzhou 510640, China
| | - S P Yang
- Institute of Tropical and Marine Meteorology, China Meteorological Administration (CMA), Guangzhou 510640, China
| | - L Y Fan
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - T Deng
- Institute of Tropical and Marine Meteorology, China Meteorological Administration (CMA), Guangzhou 510640, China
| | - X J Deng
- Institute of Tropical and Marine Meteorology, China Meteorological Administration (CMA), Guangzhou 510640, China
| | - D Q Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
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Duan JJ, Ning T, Bai M, Zhang L, Li HL, Liu R, Ge SH, Wang X, Yang YC, Ji Z, Wang FX, Sun YS, Ba Y, Deng T. [The efficacy of chemotherapy re-challenge in third-line setting for metastatic colorectal cancer patients: a real-world study]. Zhonghua Zhong Liu Za Zhi 2023; 45:967-972. [PMID: 37968083 DOI: 10.3760/cma.j.cn112152-20220901-00591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Objective: To explore the efficacy of chemotherapy re-challenge in the third-line setting for patients with metastatic colorectal cancer (mCRC) in the real world. Methods: The clinicopathological data, treatment information, recent treatment efficacy, adverse events and survival data of mCRC patients who had disease progression after treatment with oxaliplatin-based and/or irinotecan-based chemotherapy and received third-line chemotherapy re-challenge from January 2013 to December 2020 at Tianjin Medical University Cancer Institute and Hospital were retrospectively collected. Survival curves were plotted with the Kaplan-Meier method, and the Cox proportional hazard model was used to analyze the prognostic factors. Results: A total of 95 mCRC patients were included. Among them, 32 patients (33.7%) received chemotherapy alone and 63 patients (66.3%) received chemotherapy combined with targeted drugs. Eighty-three patients were treated with dual-drug chemotherapy (87.4%), including oxaliplatin re-challenge in 35 patients and irinotecan re-challenge in 48 patients. The remaining 12 patients were treated with triplet chemotherapy regimens (12.6%). Among them, as 5 patients had sequential application of oxaliplatin and irinotecan in front-line treatments, their third-line therapy re-challenged both oxaliplatin and irinotecan; 7 patients only had oxaliplatin prescription before, and these patients re-challenged oxaliplatin in the third-line treatment. The overall response rate (ORR) and disease control rate (DCR) reached 8.6% (8/93) and 61.3% (57/93), respectively. The median progression free survival (mPFS) and median overall survival (mOS) were 4.9 months and 13.0 months, respectively. The most common adverse events were leukopenia (34.7%) and neutropenia (34.7%), followed by gastrointestinal adverse reactions such as nausea (32.6%) and vomiting (31.6%). Grade 3-4 adverse events were mostly hematological toxicity. Cox multivariate analysis showed that gender (HR=1.609, 95% CI: 1.016-2.548) and the PFS of front-line treatments (HR=0.598, 95% CI: 0.378-0.947) were independent prognostic factors. Conclusion: The results suggested that it is safe and effective for mCRC patients to choose third-line chemotherapy re-challenge, especially for patients with a PFS of more than one year in front-line treatments.
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Affiliation(s)
- J J Duan
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - T Ning
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - M Bai
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - L Zhang
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - H L Li
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - R Liu
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - S H Ge
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - X Wang
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Y C Yang
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Z Ji
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - F X Wang
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Y S Sun
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Y Ba
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - T Deng
- Department of GI Medical Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
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Ye SW, Shen KF, Xiao M, Zhang PL, Zhang SY, Deng T, Huang L, Zhou XX. [A case of Hb M-Iwate combined with diffuse large B-cell lymphoma]. Zhonghua Xue Ye Xue Za Zhi 2023; 44:607. [PMID: 37749047 PMCID: PMC10509627 DOI: 10.3760/cma.j.issn.0253-2727.2023.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Indexed: 09/27/2023]
Affiliation(s)
- S W Ye
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - K F Shen
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - M Xiao
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - P L Zhang
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - S Y Zhang
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - T Deng
- Department of Hematology, The Fifth People's Hospital of Chongqing, Chongqing 400062, China
| | - L Huang
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
| | - X X Zhou
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China
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Deng T, DU B, Xi X. [Colorectal cancer cells induce the formation of cancer-associated fibroblasts by activating the ERK signaling pathway in fibroblasts]. Nan Fang Yi Ke Da Xue Xue Bao 2023; 43:943-951. [PMID: 37439166 DOI: 10.12122/j.issn.1673-4254.2023.06.09] [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: 07/14/2023]
Abstract
OBJECTIVE To investigate the mechanism by which conditioned medium of colorectal cancer cells promotes the formation of cancer-associated fibroblasts (CAFs). METHODS Normal human colorectal fibroblasts (CCD-18Co cells) in logarithmic growth phase were treated with the conditioned media of colorectal cancer HCT116 cells (HCT116-CM) or Caco-2 cells (Caco-2-CM) alone or in combination with 300 nmol/L ERK inhibitor SCH772984. The expression levels of CAFs-related molecular markers were detected in the treated cells with real-time quantitative PCR (RT- qPCR) and immunofluorescence assay, and the changes in cell proliferation, colony formation and migration were assessed with RTCA, colony formation and wound healing assays; Western blotting was performed to detect the activated signaling pathways in the fibroblasts and the changes in CAFs formation after blocking of the signaling pathway. RESULTS HCT116-CM and Caco-2-CM significantly upregulated mRNA expression levels of CAFs markers (including α-SMA, FAP, FN and TGF-β) in CCD-18Co cells, and strongly promoted fibroblast transformation into CAFs (P < 0.05). The two conditioned media also promoted the proliferation, colony formation and migration of CCD-18Co cells (P < 0.05) and significantly increased the levels of α-SMA protein and ERK phosphorylation in the cells (P < 0.05). The ERK inhibitor SCH772984 obviously inhibited the expression of α-SMA and the transformation of CCD-18Co cells into CAFs induced by the conditioned medium of colorectal cancer cells (P < 0.05). CONCLUSION Colorectal cancer cells may induce the formation of colorectal CAFs by activating the ERK pathway in the fibroblasts.
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Affiliation(s)
- T Deng
- Department of Immunology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China
| | - B DU
- Department of Immunology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China
| | - X Xi
- Department of Immunology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China
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Shen L, Gong J, Niu Z, Zhao R, L. Chen, L. Liu, Deng T, L. Lu, Zhang Y, Z. Li, X. Li, B. Xia. 1210P The preliminary efficacy and safety of KN026 combined with KN046 treatment in HER2-positive locally advanced unresectable or metastatic gastric/gastroesophageal junction cancer without prior systemic treatment in a phase II study. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Deng T, Xu B, Zhang L, Li C. Bottlebrush Polymer-Functionalized Graphene Oxide-Based Multifunctional Poly(vinyl alcohol) Nanocomposite Films with Exceptional Performance. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tianbo Deng
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, People’s Republic of China
| | - Binbin Xu
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, People’s Republic of China
| | - Ling Zhang
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, People’s Republic of China
| | - Chunzhong Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, People’s Republic of China
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Deng T, Zhang JY, Yang XM. [Research and development technology platform and research progress of universal influenza vaccine]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:1500-1506. [PMID: 34963251 DOI: 10.3760/cma.j.cn112150-20210125-00075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Vaccination is the most effective measure to prevent influenza. However, due to the existence of antigen drift and/or antigen shift of influenza virus, the vaccine strains often do not match the epidemic strains, so that the protection provided by influenza vaccine is still limited. With the rapid development of new vaccine technology, a kind of influenza vaccine with extensive protection or universal has attracted great attention. It can effectively induce humoral and cellular immunity against the conserved epitopes of influenza virus, provide good protection against various types/subtypes of influenza virus, and has a rapid production platform, which is the ideal goal for the development of a new generation of universal influenza vaccine. This article reviews the latest research progress of influenza universal vaccine.
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Affiliation(s)
- T Deng
- The 2nd Research Department of Viral Vaccine, Wuhan Institute of Biological Products, Wuhan Institute of Biological Products, Wuhan 430207, China National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
| | - J Y Zhang
- The 2nd Research Department of Viral Vaccine, Wuhan Institute of Biological Products, Wuhan Institute of Biological Products, Wuhan 430207, China National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China
| | - X M Yang
- National Engineering Technology Research Center for Combined Vaccines, Wuhan 430207, China China Biotechnology Co., Ltd, Beijing 100029, China
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Zhang D, Deng T, Luo Z, Zhu A, Yang B, Zhong H, Li S, Yang X. [Surface modification of titanium implant with hBMP-2/hIGF-1 for promoting biocompatibility and osteogenesis]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:1277-1282. [PMID: 34549722 DOI: 10.12122/j.issn.1673-4254.2021.08.22] [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: 11/24/2022]
Abstract
OBJECTIVE To prepare the human bone morphogenetic protein-2(hBMP-2)/human insulin-like growth factor-1(hIGF-1)coating titanium(Ti)and assess its performance as a dental implant material. METHODS hBMP-2 and hIGF-1 were coated to the smooth surface of a Ti plate, and its efficacy for promoting bone formation and bone integration was compared with a pristine Ti plate.The surface characteristics of the metal samples were evaluated using scanning electron microscope (SEM) and by contact angle measurement.MG63 cells were seeded on the surface of the Ti plates, and MTT assay and alizarin red staining was used to examine the cell proliferation and formation of calcified nodules, respectively.Alkaline phosphatase (ALP)secretion of the cells was examined with ELISA, and cellular expressions of osteocalcin and osteopontin were detected with Western blotting for assessing osteogenesis. RESULTS SEM examination showed that the surface of Ti with hBMP-2 and hIGF-1 coating presented with a radial pattern resembling snowflakes.The contact angles of non-coated Ti, hBMP-2-coated Ti, hIGF-1-coated, and hBMP-2/-hIGF-1-coated Ti samples were 83.2°, 54°, 56° and 54°, respectively.Compared with the non-coated Ti plate, the surface-modified Ti samples showed a significantly smaller contact angle (P=0.032, 0.029, and 0.028), indicating a good hydrophilicity of the samples.MTT assay showed that MG63 cells grew well on the surface of the coated Ti plates.The hBMP-2/IGF-1 coating significantly induced cellular secretion of ALP(P=0.021, 0.014)and obviously promoted osteogenesis of MG63 cells (P < 0.05).Western blotting results showed that hBMP-2/IGF-1 coating significantly enhanced the expressions of osteocalcin and osteopontin in the seeded cells (P < 0.05). CONCLUSION hBMP-2 and hIGF-1 coating of Ti material can promote osteogenesis of the cells seeded on its surface to improve the performance of such Ti material as dental implants.
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Affiliation(s)
- D Zhang
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - T Deng
- Department of Stomatology, Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen 518107, China
| | - Z Luo
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - A Zhu
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - B Yang
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - H Zhong
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - S Li
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - X Yang
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
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Zheng YM, Peng C, Lu Y, Deng T, Li RR, Zhou YF. [Incidence of deeply infiltrating endometriosis among 240 cases of pelvic endometriosis and analysis of its clinical and pathological characteristics]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:384-389. [PMID: 32842244 DOI: 10.3760/cma.j.cn112141-20191202-00654] [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 evaluate the incidence of deeply infiltrating endometriosis (DIE) among patients of pelvic endometriosis confirmed by pathology and to make analysis of its clinical and pathological characteristics. Methods: From January 1, 2018 to December 31, 2018, clinical data of 240 cases of pelvic endometriosis diagnosed by laparoscopy and pathology hospitalized in Peking University First Hospital were analyzed retrospectively for the characteristics of symptoms, pelvic examination and anatomic distribution of endometriosis foci. Results: (1) Among 240 cases of pelvic endometriosis, 94 were diagnosed with DIE with an incidence of 39.2% (94/240); of them the diagnosis were made preoperatively in 44 cases (46.8%, 44/94). (2) Compared with those without DIE, patients with DIE had higher rates of secondary dysmenorrhea [53.2% (50/94) versus 38.4% (56/146), P=0.033], anal pain [43.6% (41/94) versus 28.1% (41/146), P=0.013], dyspareunea [39.4% (37/94) versus 18.5% (27/146), P=0.001] and frequent bowel movement [33.0% (31/94) versus 15.8%(23/146), P=0.002]. (3) Patients with DIE had higher rates of bad movement of uterus [21.3% (20/94) versus 6.8% (10/146), P=0.001], painful nodularity on uterosacral ligaments [26.6% (25/94) versus 6.2% (9/146), P<0.01], painful nodularity of posterior fornix [19.1% (18/94) versus 4.8% (7/146), P<0.01], blue nodule in vaginal wall [6.4% (6/94) versus 0 (0/146), P=0.003] by pelvic examination compared with those without DIE. (4) Ninety-four patients with DIE had a total of 162 nodules, of those 88 (54.3%, 88/162) located in uterosacral ligaments, 14 (8.6%, 14/162) in the rectum, 7 (4.3%, 7/162) in vaginal wall, 6 (3.7%, 6/162) in ureter, 4 in bladder (2.5%, 4/162), 2 (1.2%, 2/162) in Douglas pouch. Forty-three DIE patients (45.7%, 43/94) had more than one nodules. Patients with DIE had concomitant ovarian endometriosis in 69 cases (73.4%, 69/94), with a total of 103 endometrial cysts. (5) Patients with DIE had a higher rate of obliterated Douglas pouch [76.6% (72/94) versus 19.2% (28/146), P<0.01]. Conclusions: More than one third of patients with pelvic endometriosis have concomitant DIE with a lower rate of preoperative diagnosis. Pelvic pains, bad movement of uterus and painful nodulirity around cervix suggest the presence of DIE.
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Affiliation(s)
- Y M Zheng
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing 100034, ChinaZheng Yumei is working on the Department of Obstetrics and Gynecology, Qian Xi Nan People's Hospital, Xingyi 562400, China
| | - C Peng
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing 100034, ChinaZheng Yumei is working on the Department of Obstetrics and Gynecology, Qian Xi Nan People's Hospital, Xingyi 562400, China
| | - Y Lu
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing 100034, ChinaZheng Yumei is working on the Department of Obstetrics and Gynecology, Qian Xi Nan People's Hospital, Xingyi 562400, China
| | - T Deng
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing 100034, ChinaZheng Yumei is working on the Department of Obstetrics and Gynecology, Qian Xi Nan People's Hospital, Xingyi 562400, China
| | - R R Li
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing 100034, ChinaZheng Yumei is working on the Department of Obstetrics and Gynecology, Qian Xi Nan People's Hospital, Xingyi 562400, China
| | - Y F Zhou
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing 100034, ChinaZheng Yumei is working on the Department of Obstetrics and Gynecology, Qian Xi Nan People's Hospital, Xingyi 562400, China
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Yin CQ, Solmon F, Deng XJ, Zou Y, Deng T, Wang N, Li F, Mai BR, Liu L. Geographical distribution of ozone seasonality over China. Sci Total Environ 2019; 689:625-633. [PMID: 31279208 DOI: 10.1016/j.scitotenv.2019.06.460] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 06/25/2019] [Accepted: 06/27/2019] [Indexed: 06/09/2023]
Abstract
Up to now, a nation-wide scale study of surface ozone (O3) concentrations in China was limited due to scarce observation. Thanks to the establishment of national air quality monitoring network in 2013, surface O3 data from 1402 stations during 2014-2017 were collected to investigate O3 seasonality. Our analysis reveals that the variations of monthly O3 averaged from daily mean concentration during a year show different temporal profiles depending on latitude. A unimodal structure (UMS) is generally found for latitudes over 35°N, whereas a bimodal structure (BMS) is in most of the cases identified south of 35°N. The peak of UMS is found in the period of May to July, whereas the first and second peaks of BMS are found from April to June, and from July to October, respectively. In addition, the seasonality of O3 presents a strong dependence on pseudo-equivalent potential temperature and monsoonal clouds. The onset and retreat of warm and wet air are correlated to the summer minimum in BMS cases and to the sharp decrease of UMS in July. As far as the relationships between O3 and carbon monoxide are concerned, the effects of clean maritime air masses on the summer trough of O3 are not significant for inland sites. Overall, summer monsoon bringing warm and moist air and subsequent clouds leads to the suppression of photochemical production, thereby contributing directly to the geographical distribution of O3 seasonality.
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Affiliation(s)
- C Q Yin
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China.
| | - F Solmon
- Laboratoire d'Aérologie, Centre National de la Recherche Scientifique, Toulouse, France
| | - X J Deng
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
| | - Y Zou
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
| | - T Deng
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
| | - N Wang
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
| | - F Li
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
| | - B R Mai
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
| | - L Liu
- Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
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Deng T, Duan X, Liu B, Lan Y, Cai C, Zhang T, Zhu W, Mai Z, Wu W, Zeng G. Association between phosphodiesterase type 5 inhibitors use and risk of melanoma: a meta-analysis. Neoplasma 2019. [PMID: 29534582 DOI: 10.4149/neo_2018_170111n23] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This meta-analysis aimed to clarify the actual association between the phosphodiesterase type 5 inhibitors (PDE5-Is) use and the risk of melanoma in erectile dysfunction (ED) patients. A systematic literature search was conducted in online databases in October, 2016 to identify studies focusing on the association between PDE5-Is use and the risk of melanoma. Summarized multivariate adjusted risk ratios (RRs) and 95% confidence intervals (CIs) were calculated to assess the strength of associations. A total of six clinical trials containing more than one million participants were included. ED patients using PDE5-Is shared a significant high risk of melanoma (RR=1.12, 95% CI=1.03-1.21, p=0.006). Positive associations were observed in all kinds of prescriptions: single prescription (RR=1.20, 95% CI=1.06-1.35, p=0.003), medium number of prescription (RR=1.15, 95% CI=1.01-1.30, p=0.03), and high number of prescription (RR=1.18, 95% CI=1.05-1.34, P=0.006). Additionally, PDE5-Is were also found to be significantly associated with increased risk of basal cell carcinoma (RR=1.14, 95% CI=1.09-1.19, p<0.00001). Our study indicates that PDE5-Is use could significantly increase the risk of melanoma and basal cell carcinoma. However, the risk of melanoma did not rise significantly with the increased number of prescriptions. Consequently, owing to the lack of information about other potential synergistic factors, it is difficult for us to make a solid conclusion that application of PDE5-Is is the direct cause of increased risk of melanoma. Their relationship needs to be validated by further evidences.
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Du C, Deng T, Zhou Y, Ye T, Zhou Z, Zhang S, Shao B, Wei P, Sun H, Khan FA, Yang L, Hua G. Systematic analyses for candidate genes of milk production traits in water buffalo (Bubalus Bubalis). Anim Genet 2019; 50:207-216. [PMID: 30937948 DOI: 10.1111/age.12739] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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: 09/25/2018] [Indexed: 11/28/2022]
Abstract
Water buffalo (Bubalus bubalis) is of great economic importance as a provider of milk and meat in many countries. However, the milk yield of buffalo is much lower than that of Holstein cows. Selection of candidate genes related to milk production traits can be applied to improve buffalo milk performance. A systematic review of studies of these candidate genes will be greatly beneficial for researchers to timely and efficiently understand the research development of molecular markers for buffalo milk production traits. Here, we identified and classified the candidate genes associated with buffalo milk production traits. A total of 517 candidate genes have been identified as being associated with milk performance in different buffalo breeds. Nineteen candidate genes containing 47 mutation sites have been identified using the candidate gene approach. In addition, 499 candidate genes have been identified in six genome-wide association studies (GWASes) including two studies performed with the bovine SNP chip and four studies with the buffalo SNP chip. Genes CTNND2 (catenin delta 2), APOB (apolipoprotein B), FHIT (fragile histidine triad) and ESRRG (estrogen related receptor gamma) were identified in at least two GWASes. These four genes, especially APOB, deserve further study to explore regulatory roles in buffalo milk production. With growth in the number of buffalo genomic studies, more candidate genes associated with buffalo milk production traits will be identified. Therefore, future studies, such as those investigating gene location and functional analyses, are necessary to facilitate the exploitation of genetic potential and the improvement of buffalo milk performance.
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Affiliation(s)
- C Du
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - T Deng
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.,Guangxi Provincial Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, 530001, China
| | - Y Zhou
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - T Ye
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Z Zhou
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - S Zhang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - B Shao
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - P Wei
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - H Sun
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - F A Khan
- The Center for Biomedical Research, Key Laboratory of Organ Transplantation, Ministry of Education, Ministry of Health, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430070, China
| | - L Yang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.,Hubei Province's Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, China
| | - G Hua
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Wuhan, 430070, China.,College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.,Hubei Province's Engineering Research Center in Buffalo Breeding and Products, Wuhan, 430070, China
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Su T, Farnsworth A, Spicer RA, Huang J, Wu FX, Liu J, Li SF, Xing YW, Huang YJ, Deng WYD, Tang H, Xu CL, Zhao F, Srivastava G, Valdes PJ, Deng T, Zhou ZK. No high Tibetan Plateau until the Neogene. Sci Adv 2019; 5:eaav2189. [PMID: 30854430 PMCID: PMC6402856 DOI: 10.1126/sciadv.aav2189] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 01/25/2019] [Indexed: 05/09/2023]
Abstract
The Late Paleogene surface height and paleoenvironment for the core area of the Qinghai-Tibetan Plateau (QTP) remain critically unresolved. Here, we report the discovery of the youngest well-preserved fossil palm leaves from Tibet. They were recovered from the Late Paleogene (Chattian), ca. 25.5 ± 0.5 million years, paleolake sediments within the Lunpola Basin (32.033°N, 89.767°E), central QTP at a present elevation of 4655 m. The anatomy of palms renders them intrinsically susceptible to freezing, imposing upper bounds on their latitudinal and altitudinal distribution. Combined with model-determined paleoterrestrial lapse rates, this shows that a high plateau cannot have existed in the core of Tibet in the Paleogene. Instead, a deep paleovalley, whose floor was <2.3 km above mean sea level bounded by (>4 km) high mountain systems, formed a topographically highly varied landscape. This finding challenges prevailing views on tectonic processes, monsoon dynamics, and the evolution of Asian biodiversity.
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Affiliation(s)
- T. Su
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - A. Farnsworth
- School of Geographical Sciences, University of Bristol, Bristol BS81SS, UK
| | - R. A. Spicer
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
- School of Environment, Earth and Ecosystem Sciences, The Open University, Milton Keynes MK76AA, UK
| | - J. Huang
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
| | - F.-X. Wu
- Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China
| | - J. Liu
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
| | - S.-F. Li
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
| | - Y.-W. Xing
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
| | - Y.-J. Huang
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China
| | - W.-Y.-D. Deng
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - H. Tang
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - C.-L. Xu
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - F. Zhao
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - G. Srivastava
- Birbal Sahni Institute of Palaeosciences, 53 University Road, Lucknow 226 007, India
| | - P. J. Valdes
- School of Geographical Sciences, University of Bristol, Bristol BS81SS, UK
| | - T. Deng
- Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China
| | - Z.-K. Zhou
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China
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15
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Xu C, Qu P, Deng T, Bell K, Chen J. Does simultaneous bilateral total joint arthroplasty increase deep infection risk compared to staged surgeries? A meta-analysis. J Hosp Infect 2019; 101:214-221. [DOI: 10.1016/j.jhin.2018.08.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 08/29/2018] [Indexed: 11/25/2022]
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16
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Feng Y, Liu J, Huang H, Zhang C, Wan T, Tong C, Deng T, Tu H, Huang Y, Liu G, Huang Q, Liu Z. Comparison of PARPi with angiogenesis inhibitors and chemotherapy for maintenance in ovarian cancer: A network meta-analysis. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy285.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Xiao Y, Deng T, Shang Z, Wang D. Adiponectin inhibits oxidization-induced differentiation of T helper cells through inhibiting costimulatory CD40 and CD80. ACTA ACUST UNITED AC 2017; 50:e6227. [PMID: 28513775 PMCID: PMC5479391 DOI: 10.1590/1414-431x20176227] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 12/27/2016] [Accepted: 03/27/2017] [Indexed: 12/19/2022]
Abstract
Adiponectin is a multifunctional adipokine that has several oligomeric forms in the blood stream, which broadly regulates innate and acquired immunity. Therefore, in this study, we aimed to observe the differentiation of T helper (Th) cells and expression of costimulatory signaling molecules affected by adiponectin. The mRNA and protein expression levels of adiponectin and its receptors in oxidized low density lipoprotein cholesterol-treated endothelial cells were assayed by real time PCR and immunofluorescence. The endothelial cells were then treated with adiponectin with or without adipoR1 or adipoR2 siRNA and co-cultured with T lymphocytes. The distribution of Th1, Th2 and Th17 subsets were assayed by flow cytometry. The effects of adiponectin on costimulatory signaling molecules HLA-DR, CD80, CD86 and CD 40 was also assayed by flow cytometry. The results showed that endothelial cells expressed adiponectin and its receptor adipoR1 and adipoR2, but not T-cadherin. Adiponectin suppressed Th1 and Th17 differentiation through adipoR1 receptor, contributed to the inhibition of CD80 and CD40, and inhibited differentiation of Th1 and Th17 by inhibiting antigen presenting action.
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Affiliation(s)
- Y Xiao
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - T Deng
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Z Shang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - D Wang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Duan J, Deng T, Ying G, Zhang H, Zhou L, Bai M, Li H, Ba Y. Prognostic significance of the T2 substage in patients with esophageal squamous cell carcinoma. Dis Esophagus 2017; 30:1-7. [PMID: 28375473 DOI: 10.1093/dote/dow027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Indexed: 12/11/2022]
Abstract
The invasion of the muscularis propria is defined as T2 stage in esophageal squamous cell carcinoma. Evidence is lacking regarding whether the T2 substage based on anatomy may serve as a prognostic indicator. This study aims to confirm the prognostic value of the T2 substage. The clinicopathological characteristics of 120 patients who had pathologically verified T2 tumors between 2006 and 2011 at the Tianjin Medical University Cancer Institute and Hospital were retrospectively studied. Based on the invasion depth, tumors that had penetrated the circular muscle layer were defined as T2a, while T2b disease referred to those that had invaded the longitudinal muscle layer. Factors potentially related to survival were analyzed with univariate and multivariate analyses. The logistic regression model was used to examine the factors associated with lymph node metastasis. To verify the prognostic value of the T2 substage further, patients with T1b and T3 stage disease during the same period were selected for comparisons. The univariate and multivariate analyses demonstrated that the T2 substage and N stage were independent prognostic factors. The T2 substage was highly relevant to lymph node metastasis in the logistic regression model (P = 0.044). When T1b and T3 was considered, the survival of T2a patients was closer to that of T1b patients, while the survival of T2b patients was closer to that of T3 disease (P = 0.000). The T2 substage was an independent prognostic factor. Patients with T2a tumors displayed a favorable survival, while the prognosis of T2b patients was closer to that of T3 patients.
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Liu JM, Cheng SH, Xia C, Deng T, Zhu YC, Wei X, Huang ZL, Liao BH, Luo DY, Zhang YG, Jin T, Wang KJ, Huang J, Li H. Association between single nucleotide polymorphisms in AKT1 and the risk of prostate cancer in the Chinese Han population. Genet Mol Res 2017; 16:gmr-16-01-gmr.16019469. [PMID: 28363000 DOI: 10.4238/gmr16019469] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AKT1, also known as v-akt murine thymoma viral oncogene homolog 1, is involved in the regulation of cell-survival and anti-apoptotic activities, which may affect the pathogenesis of various cancers. However, the association between genetic variants of AKT1 and the risk of developing prostate cancer has not been investigated before. This study investigated the associations between three polymorphisms (rs1130214, rs3730358, and rs2494732) in AKT1 and the risk of development of prostate cancer in the Chinese Han population. Sequenom MassARRAY & iPLEX technology were used to genotype these polymorphisms in 493 Chinese Han patients with prostate cancer and 309 age-matched healthy individuals. Compared to the CC genotype of the rs3730358 polymorphism, the CT genotype of the same polymorphism was strongly associated with a decreased risk of prostate cancer (OR = 0.617, 95%CI = 0.390-0.976, P = 0.037). However, there was no significant difference between the allele frequency of the rs3730358 polymorphism and those of the other two polymorphisms (P > 0.05). Moreover, no significant difference was found in the haplotype analysis (P > 0.05). Our study found that the variant genotype CT of rs3730358 of AKT1 was associated with a decreased risk of prostate cancer, which suggested that this polymorphism could play an important role in the development of the disease.
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Affiliation(s)
- J M Liu
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - S H Cheng
- Department of Radiology, Peking Union Medical College Hospital; Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - C Xia
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - T Deng
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Y C Zhu
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - X Wei
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Z L Huang
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - B H Liao
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - D Y Luo
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Y G Zhang
- The Periodical Press of West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - T Jin
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - K J Wang
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - J Huang
- West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - H Li
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology) West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Wang N, Lyu XP, Deng XJ, Guo H, Deng T, Li Y, Yin CQ, Li F, Wang SQ. Assessment of regional air quality resulting from emission control in the Pearl River Delta region, southern China. Sci Total Environ 2016; 573:1554-1565. [PMID: 27642074 DOI: 10.1016/j.scitotenv.2016.09.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 05/13/2016] [Revised: 08/31/2016] [Accepted: 09/02/2016] [Indexed: 05/21/2023]
Abstract
To evaluate the impact of emission control measures on the air quality in the Pearl River Delta (PRD) region of South China, statistic data including atmospheric observations, emissions and energy consumptions during 2006-2014 were analyzed, and a Weather Research and Forecasting - Community Multi-scale Air Quality (WRF-CMAQ) model was used for various scenario simulations. Although energy consumption doubled from 2004 to 2014 and vehicle number significantly increased from 2006 to 2014, ambient SO2, NO2 and PM10 were reduced by 66%, 20% and 24%, respectively, mainly due to emissions control efforts. In contrast, O3 increased by 19%. Model simulations of three emission control scenarios, including a baseline (a case in 2010), a CAP (a case in 2020 assuming control strength followed past control tendency) and a REF (a case in 2020 referring to the strict control measures based on recent policy/plans) were conducted to investigate the variations of air pollutants to the changes in NOx, VOCs and NH3 emissions. Although the area mean concentrations of NOx, nitrate and PM2.5 decreased under both NOx CAP (reduced by 1.8%, 0.7% and 0.2%, respectively) and NOx REF (reduced by 7.2%, 1.8% and 0.3%, respectively), a rising of PM2.5 was found in certain areas as reducing NOx emissions elevated the atmospheric oxidizability. Furthermore, scenarios with NH3 emission reductions showed that nitrate was sensitive to NH3 emissions, with decreasing percentages of 0-10.6% and 0-48% under CAP and REF, respectively. Controlling emissions of VOCs reduced PM2.5 in the southwestern PRD where severe photochemical pollution frequently occurred. It was also found that O3 formation in PRD was generally VOCs-limited while turned to be NOx-limited in the afternoon (13:00-17:00), suggesting that cutting VOCs emissions would reduce the overall O3 concentrations while mitigating NOx emissions in the afternoon could reduce the peak O3 levels.
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Affiliation(s)
- N Wang
- Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, China Meteorological Administration, Guangzhou, China.
| | - X P Lyu
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - X J Deng
- Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, China Meteorological Administration, Guangzhou, China.
| | - H Guo
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - T Deng
- Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, China Meteorological Administration, Guangzhou, China
| | - Y Li
- Division of Environment, Hong Kong University of Science and Technology, Kowloon, Hong Kong
| | - C Q Yin
- Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, China Meteorological Administration, Guangzhou, China
| | - F Li
- Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, China Meteorological Administration, Guangzhou, China
| | - S Q Wang
- Zhuhai Meteorological Bureau, Zuhai, China
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Hu H, Liu H, Peng C, Deng T, Fu X, Chung C, Zhang E, Lu C, Zhang K, Liang Z, Yang Y. Clinical Experience of Non-Invasive Prenatal Chromosomal Aneuploidy Testing in 190,277 Patient Samples. Curr Mol Med 2016; 16:759-766. [DOI: 10.2174/1566524016666161013142335] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 09/29/2016] [Accepted: 10/02/2016] [Indexed: 11/22/2022]
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22
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Jin ZL, Pei H, Xu YH, Yu J, Deng T. The SUMO-specific protease SENP5 controls DNA damage response and promotes tumorigenesis in hepatocellular carcinoma. Eur Rev Med Pharmacol Sci 2016; 20:3566-3573. [PMID: 27649656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE SUMOylation plays critical roles in a variety of physiological and pathological processes including tumorigenesis. SUMOylation is a reversible process which is mediated by the SENP (Sentrin/SUMO-specific protease) family to remove SUMO from conjugated substrates. SENP5 has been reported to play critical roles in the control of several cancers including breast cancer, osteosarcoma and oral squamous cell carcinoma. In this study, we uncovered a role of SENP5 in promoting tumorigenesis process in hepatocellular carcinoma (HCC) via regulating DNA damage response. MATERIALS AND METHODS The mRNA and protein levels of SENP5 in 10 pairs of HCC samples were determined by Realtime PCR and Western blot, respectively. SiRNAs were used to silence the expression of SENP5 in HepG2 cells. Male BALB/c nude mice were used to determine the roles of SENP5 on tumorigenesis. In vivo SUMOylation assay was used to detect the SUMOylation of ATRIP. Immunoprecipitation (IP) was used to detect the interaction between SENP5 and ATRIP. RESULTS We found that SENP5 was over-expressed in HCC samples and required for HCC cells proliferation both in vitro and in vivo. SENP5-depleted HepG2 cells exhibited hypersensitivity to IR and etoposide treatment with defective checkpoint activation including decreased activation of ATR and phosphorylation of ATR targets. At the molecular level, we found that SENP5 interacted with ATRIP and promoted ATRIP deSUMOylation. CONCLUSIONS Overall, our data suggest that SENP5 is required for HCC cell growth and might be a promising drug target for HCC.
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Affiliation(s)
- Z-L Jin
- Department of Oncology, The Second Clinical Medical College, Yangtze University, Jingzhou, Hubei Province, P.R. China.
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Sun J, Guan F, Zhu X, Ning Z, Ma T, Liu J, Deng T. Micro-fabricated packed gas chromatography column based on laser etching technology. J Chromatogr A 2016; 1429:311-6. [DOI: 10.1016/j.chroma.2015.12.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 10/29/2015] [Accepted: 12/01/2015] [Indexed: 11/28/2022]
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Wang X, Zuo D, Chen Y, Li W, Liu R, He Y, Ren L, Zhou L, Deng T, Wang X, Ying G, Ba Y. Shed Syndecan-1 is involved in chemotherapy resistance via the EGFR pathway in colorectal cancer. Br J Cancer 2014; 111:1965-76. [PMID: 25321193 PMCID: PMC4229635 DOI: 10.1038/bjc.2014.493] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [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] [Revised: 07/30/2014] [Accepted: 08/13/2014] [Indexed: 01/03/2023] Open
Abstract
Background: Syndecan-1 (Sdc-1) shedding induced by matrix metalloproteinase-7 (MMP-7) and additional proteases has an important role in cancer development. However, the impact of Sdc-1 shedding on chemotherapeutic resistance has not been reported. Methods: We examined Sdc-1 shedding in colorectal cancer by enzyme-linked immunosorbent assay (ELISA), Dot blot, reverse transcription-PCR (RT-PCR), immunohistochemistry and so on, its impact on chemotherapeutic sensitivity by collagen gel droplet embedded culture-drug sensitivity test (CD-DST) and MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide), and potential mechanisms of action by Dot blot, western blot and immunofluorescence. Results: Sdc-1 shedding was increased in colorectal cancer patients, Sdc-1 serum levels in postoperative patients were lower than in preoperative patients, but still higher than those observed in healthy adults. Patients with high preoperative Sdc-1 serum levels were less responsive to 5-Fluorouracil, Oxaliplatin, Irintecan, Cisplatin or Paclitaxel chemotherapy. Moreover, the disease-free survival of patients with high preoperative Sdc-1 serum levels was significantly poorer. The possible mechanism of chemotherapy resistance in colorectal cancer can be attributed to Sdc-1 shedding, which enhances EGFR phosphorylation and downstream signalling. Conclusions: Shed Sdc-1 is involved in chemotherapy resistance via the EGFR pathway in colorectal cancer, and Sdc-1 serum levels could be a new prognostic marker in colorectal cancer.
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Affiliation(s)
- X Wang
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - D Zuo
- Key Laboratory of Cancer Prevention and Therapy, Department of Clinical Laboratory, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y Chen
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Digestive Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - W Li
- Department of Cardiovascular Medicine, Tianjin Chest Hospital, Tianjin 300000, China
| | - R Liu
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y He
- Department of Hepatology and Infectious Disease, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - L Ren
- Key Laboratory of Cancer Prevention and Therapy, Department of Clinical Laboratory, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - L Zhou
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - T Deng
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - X Wang
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Digestive Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - G Ying
- Laboratory of Cancer Cell Biology, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y Ba
- Key Laboratory of Cancer Prevention and Therapy, Department of Gastrointestinal Oncology, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
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Zhang ML, Cao Z, He JL, Xue L, Zhou Y, Long S, Deng T, Zhang L. A simple gold plate electrode modified with Gd-doped TiO2nanoparticles used for determination of trace nitrite in cured food. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2012; 29:1938-46. [DOI: 10.1080/19440049.2012.715762] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Pawlowski TL, Spetzler D, Tinder T, Kimbrough J, Deng T, Kim J, Ellis P, Tyrell A, Kennedy P, Kuslich C. Circulating exosomes may provide a more sensitive platform to monitor disease progression compared to circulating tumor cells. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.10580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kuslich C, Pawlowski TL, Deng T, Tinder T, Kim J, Kimbrough J, Spetzler D. A sensitive exosome-based biosignature for the diagnosis of prostate cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.4636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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28
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Spetzler D, Pawlowski TL, Tinder T, Kimbrough J, Deng T, Kim J, Moran B, Conrad A, Esmay P, Kuslich C. The molecular evolution of prostate cancer cell line exosomes with passage number. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e21071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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29
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Liao X, Deng T, Zhu Y, Du G, Chen J. Enhancement of glutathione production by altering adenosine metabolism of Escherichia coli in a coupled ATP regeneration system with Saccharomyces cerevisiae. J Appl Microbiol 2008; 104:345-52. [PMID: 18194260 DOI: 10.1111/j.1365-2672.2007.03415.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS Adenosine triphosphate (ATP) during the enzymatic production of glutathione is necessary. In this study, our aims were to investigate the reason for low glutathione production in Escherichia coli coupled with an ATP regeneration system and to develop a new strategy to improve the system. METHODS AND RESULTS Glutathione can be synthesized by enzymatic methods in the presence of ATP and three precursor amino acids (L-glutamic acid, L-cysteine and glycine). In this study, glutathione was produced from E. coli JM109 (pBV03) coupled with an ATP regeneration system, by using glycolytic pathway of Saccharomyces cerevisiae WSH2 as ATP regenerator from adenosine and glucose. In the coupled system, adenosine used for ATP regeneration by S. cerevisiae WSH2 was transformed into hypoxanthine irreversibly by E. coli JM109 (pBV03). As a consequence, S. cerevisiae WSH2 could not obtain enough adenosine for ATP regeneration in the glycolytic pathway in spite of consuming 400 mmol l(-1) glucose within 1 h. By adding adenosine deaminase inhibitor to block the metabolism from adenosine to hypoxanthine, glutathione production (8.92 mmol l(-1)) enhanced 2.74-fold in the coupled system. CONCLUSIONS This unusual phenomenon that adenosine was transformed into hypoxanthine irreversibly by E. coli JM109 (pBV03) revealed that less glutathione production in the coupled ATP regeneration system was because of the poor efficiency of ATP generation. SIGNIFICANCE AND IMPACT OF THE STUDY The results presented here provide a strategy to improve the efficiency of the coupled ATP regeneration system for enhancing glutathione production. The application potential can be microbial processes where ATP is needed.
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Affiliation(s)
- X Liao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
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30
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Wang BL, Li XX, Zheng F, Liu R, Quan JX, Jia HW, Liang H, Deng T, Guo SY, Guo G, Zhang JY, Qiu MC. Construction of T-vectors for the direct, unidirectional cloning, and analysis of PCR-amplified promoters. Mol Biol 2007. [DOI: 10.1134/s002689330704019x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Wang BL, Li XX, Zheng F, Liu R, Quan JX, Jia HW, Liang H, Deng T, Guo SY, Guo G, Zhang JY, Qiu MC. [Construction of T-vectors for the direct, unidirectional cloning and analysis of PCR-amplified promoters]. Mol Biol (Mosk) 2007; 41:719-724. [PMID: 17936994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The amplification and cloning of promoters are regularly employed procedures to study the mechanism of gene regulation. In the present study we developed a method to construct T-vectors used for the direct and unidirectional cloning and analysis of promoters. These so-called T-vectors pEGFP-T and pGL3-T were derived from their parent promoterless vectors pEGFP-1 and pGL3-basic, respectively. To construct the T-vectors, an AhdI recognition site within the Ampr gene in pGL3-basic was silent mutated using overlap extension PCR. Then, a specially designed AhdI cassette was cloned into the respective parent vectors. The procedures of the T-vector construction involved a strategy to minimize the background of nonrecombinant transformants and to eliminate reverse orientation of the PCR products into the T-vectors. The cloning efficiencies of the two T-vectors were both above 85% when tested with a PCR product amplified from a sequence that was pre-confirmed to be able to initiate transcription, and moreover, the constructs harbored the inserts in a desired orientation at a >90% rate. In transient transfection assays, we demonstrated these T-vectors are functional. Thus, the present study provides an easy method to construct a series of T-vectors used for promoter characterization.
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Takayama TK, Carter CA, Deng T. Activation of prostate-specific antigen precursor (pro-PSA) by prostin, a novel human prostatic serine protease identified by degenerate PCR. Biochemistry 2001; 40:1679-87. [PMID: 11327827 DOI: 10.1021/bi002129r] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel serine protease was found in human prostate by degenerate oligonucleotide PCR amplification and cloned. The zymogen form of this enzyme, named prostinogen, is composed of 240 amino acid residues with an amino-terminal propiece of 5 residues and a 235-residue mature enzyme. The transcript has a signal peptide of 15 amino acid residues. The mature enzyme has 41% sequence identity with prostate specific antigen (PSA). Prostinogen was expressed in Escherichia coli and refolded from inclusion bodies. The zymogen, with a molecular mass of 28 kDa, was readily activated by agarose-immobilized trypsin to generate prostin, a serine protease, which cleaves the chromogenic substrate (N-benzoyl-L-Ile-L-Glu-L-Gly-L-Arg-p-nitroaniline hydrochloride) (S-2222). Recombinant prostin readily activates the precursor of PSA (pro-PSA) by cleavage of the amino terminal Arg(7)-Ile(8) peptide bond. These results indicate that prostin may be a physiological activator of pro-PSA following its own proteolytic activation, as part of a cascade system involving a series of serine protease precursor proteins in the prostate.
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Affiliation(s)
- T K Takayama
- Departments of Biochemistry and Urology, University of Washington, Box 357350, Seattle, WA 98195-7350, USA.
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33
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Chen N, Deng T, Chen P, Li L. [The regulation of apoptosis by Bcl-2, bcl-X(L), Bcl-2alpha and Bax in chronic liver disease]. Zhonghua Nei Ke Za Zhi 2000; 39:808-10. [PMID: 11798540] [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: 02/23/2023]
Abstract
OBJECTIVE To analyse the expression of Fas and Fas ligand (FasL) in patients of chronic hepatitis, liver cirrhosis and hepatocellular carcinoma and to study the regulation of apotosis by Bax and Bcl-2 subfamilies. METHODS The subfamily of Bcl-2 in the liver tissue was studied by immunohistochemistry. RESULTS In 156 cases of chronic liver disease the expression levels of Fas and FasL in the chronic hepatitis group were significantly higher than that in hepatocellular carcinoma group(P < 0.01). The expression level of Bax subfamily in the chronic hepatitis group was significantly higher than that of Bcl-2 subfamily. CONCLUSION It is suggested that Bcl-2 family is involved in the regulation of apoptosis in the chronic liver diseases.
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Affiliation(s)
- N Chen
- Institute of Liver Disease, Beijing Military General Hospital, Beijing 100700, China
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Abstract
Mitogen-activated protein kinases (MAPKs) and cyclin-dependent kinases (CDKs) are important proline-directed Ser/Thr kinases that play distinct roles in cell differentiation and proliferation. hPRP4 (pre-mRNA processing gene), a human homologue of S. pombe Prp4, is a recently isolated CDK-like kinase with homology to MAPKs. Little is known about the mRNA processing function of hPRP4 or about the signaling pathways with which it is associated. hPRP4 is expressed in a variety of human tissues with the highest expression in the brain, lung and liver. In this paper, we characterize the activation of hPRP4 in COS-7 cells and show that hPRP4 also possesses a transcription factor activation function. hPRP4 is activated by epidermal growth factor (EGF) or forskolin treatment, but not tetradecanoyl phorbol acetate (TPA) nor ultraviolet (UV) irradiation. Activated hPRP4 phosphorylates residue Thr-417 on Elk-1 resulting in Elk-1 activation. This site of Elk-1 phosphorylation is distinct from that of other MAPKs. Coexpression of hPRP4 with an Elk-1 reporter construct causes trans activation of the reporter. These findings suggest that hPRP4, a CDK-like kinase related to MAPKs, may play a distinct role in signal transduction in addition to its role in mRNA processing.
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Affiliation(s)
- Y Huang
- Department of Medicine, University of Calgary, Calgary, Alberta, T2N 4N1, Canada
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35
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Yang P, Wirnsberger G, Huang HC, Cordero SR, McGehee MD, Scott B, Deng T, Whitesides GM, Chmelka BF, Buratto SK, Stucky GD. Mirrorless lasing from mesostructured waveguides patterned by soft lithography. Science 2000; 287:465-8. [PMID: 10642543 DOI: 10.1126/science.287.5452.465] [Citation(s) in RCA: 417] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mesostructured silica waveguide arrays were fabricated with a combination of acidic sol-gel block copolymer templating chemistry and soft lithography. Waveguiding was enabled by the use of a low-refractive index (1.15) mesoporous silica thin film support. When the mesostructure was doped with the laser dye rhodamine 6G, amplified spontaneous emission was observed with a low pumping threshold of 10 kilowatts per square centimeter, attributed to the mesostructure's ability to prevent aggregation of the dye molecules even at relatively high loadings within the organized high-surface area mesochannels of the waveguides. These highly processible, self-assembling mesostructured host media and claddings may have potential for the fabrication of integrated optical circuits.
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Affiliation(s)
- P Yang
- Department of Chemistry, Department of Chemical Engineering, Department of Materials, University of California, Santa Barbara, CA 93106, USA. Department of Chemistry, Harvard University, Cambridge, MA 02138, USA
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36
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Abstract
To identify potential roles of cytokines in retroviral pathogenesis, we used reverse transcription-quantitative competitive polymerase chain reaction (RT-qcPCR) assays to characterize mRNA levels of 19 different lymphokines, chemokines, monokines and hematopoietic growth factors in three feline cell lines productively infected with subgroup A feline leukemia virus (FeLV-A) or various feline immunodeficiency virus (FIV) strains. Infection of a CD8+, CD5- large granular lymphocyte (LGL) cell line with FeLV-A activated expression of interleukin-7 (IL-7), induced modest (4-fold) increases in granulocyte/macrophage colony-stimulating factor (GM-CSF) and leukemia inhibitory factor (LIF) transcripts, and decreased transforming growth factor-beta (TGF-beta) mRNA (4-fold). The LGL cells were not susceptible to infection by FIV. Infection of MYA-1 cells, a CD4+ T-lymphoblastoid cell line, with FeLV-A activated expression of macrophage inflammatory protein-1alpha (MIP-1alpha), increased transcript levels of GM-CSF (8-fold), macrophage CSF (M-CSF) (16-fold) and stem cell factor (SCF) (250-fold), and decreased (4-fold) expression of IL-10 and tumor necrosis factor-alpha (TNF-alpha). Productive infection with four different FIV molecular clones caused progressive MYA-1 cell death; however, the mRNA expression profiles were unchanged except for 2- to 4-fold increases in M-CSF and 16- to 500-fold increases in SCF. Thus, FIV-induced MYA-1 cytopathicity was not associated with dysregulation of pro-apoptotic or survival factor transcript levels. Lastly, productive infection of PNI cells, a marrow-derived fibroendothelial cell line, with FeLV-A or any of three FIV strains induced 4-fold higher levels of IL-12p40 transcripts and variably higher levels (4- to 64-fold) of GM-CSF. Two viral strains, the FIV-14 molecular clone and the clinical isolate FIV-5122, caused syncytia formation and unique activation of IL-1beta and stromal cell-derived factor-1 (SDF-1) expression, suggesting a potential role for those factors in viral spread and/or cytopathicity. In addition, infection with FIV-5122, but not the other FIV strains or FeLV-A, induced significant increases in mRNA levels of the hematopoietic inhibitors TNF-alpha and MIP-1alpha, along with increased concentrations of soluble proteins in culture supernatants. Consistent with this, supernatant from FIV-5122 infected PNI cells suppressed hematopoietic progenitor growth in colony assays, compared to supportive activities in supernatants from other infected or uninfected PNI cell cultures. Together, these data demonstrate that feline retroviruses alter cytokine mRNA levels in general and strain-specific patterns. These changes may result in specific alterations in cell function and contribute to retroviral pathogenesis. Our observations provide a basis for directed studies of candidate factors within the hematopoietic, thymic and lymphoid microenvironments.
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Affiliation(s)
- M L Linenberger
- Department of Medicine, University of Washington, Seattle 98195, USA.
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Linenberger ML, Rohn JL, Deng T, Ellis-Smith S, Ingber R, Overbaugh J. Lymphokines modulate the growth and survival of thymic tumor cells containing a novel feline leukemia virus/Notch2 variant. Vet Immunol Immunopathol 1999; 70:223-43. [PMID: 10507363 DOI: 10.1016/s0165-2427(99)00075-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tumorigenesis occurs through a multistep process initiated by genetic lesions and facilitated by endogenous and external growth/survival signals. In many malignancies, specific oncogenic mutations correlate with phenotypic characteristics, inferring lineage-specific pathogenic mechanisms. To characterize these relationships in a unique feline tumor, we studied primary cells and two-cell lines independently-derived from a thymic lymphoma that contained and actively expressed a novel feline leukemia virus (FeLV) recombinant with transduced host Notch2 sequences. All three tumor cell populations contained similar FeLV/Notch2 proviral variants and phenotypically resembled mature thymocytes. Multiple Notch2 transcripts were expressed in the cell lines, including species that correspond to viral genomes and spliced subgenomic viral mRNA. Tumor cell line FeLV/Notch2 virus was packaged into virions; however, the variant was not efficiently transmitted to feline cells in vitro. Primary tumor cells constitutively expressed mRNA for interleukin-4 (IL-4), IL-6 and the p40 subunit of IL-12. Lymphokine mRNA was not detected in established tumor cell lines nor was T-cell growth-promoting activity found in culture supernatants. Exogenous IL-4 enhanced primary tumor cell survival, but inhibited proliferation of the cell lines. Interleukin-4 abrogated hydrocortisone-induced apoptosis in all three populations and had divergent effects on cell line clonogenic colony formation. Exogenous IL-7 and, to a lesser degree, IL-6 also had variable positive effects on the growth and viability of the tumor cell populations. Collectively, these data suggest that thymocytes are susceptible to the transforming potential of dysregulated Notch2 and that thymopoietic factors could, through overlapping and distinct mechanisms, promote the survival and outgrowth of FeLV/Notch2-containing neoplastic cells.
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Affiliation(s)
- M L Linenberger
- Department of Medicine, University of Washington, Seattle 98195, USA.
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38
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Abstract
Porous silica, niobia, and titania with three-dimensional structures patterned over multiple length scales were prepared by combining micromolding, polystyrene sphere templating, and cooperative assembly of inorganic sol-gel species with amphiphilic triblock copolymers. The resulting materials show hierarchical ordering over several discrete and tunable length scales ranging from 10 nanometers to several micrometers. The respective ordered structures can be independently modified by choosing different mold patterns, latex spheres, and block copolymers. The examples presented demonstrate the compositional and structural diversities that are possible with this simple approach.
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Affiliation(s)
- P Yang
- P. Yang, D. Zhao, G. D. Stucky, Department of Chemistry, University of California, Santa Barbara, CA 93106, USA. T. Deng and G. M. Whitesides, Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA. P. Feng
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Deng T. Continental ecosystematic variations in the carbon isotopic composition of the early pleistocene equid enamel. Chin Sci Bull 1998. [DOI: 10.1007/bf02891409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
c-Fos/c-Jun dimers (activating protein-1 transcription factor) are involved in the modulatory actions of angiotensin II (Ang II) on brain norepinephrine neurons, effects mediated via Ang II type 1 (AT1) receptors. The transcriptional activities of c-Fos and c-Jun can be augmented by Fos-regulating kinase (FRK) and c-Jun NH2-terminal kinase (JNK), respectively. In this study, we investigated the effects of Ang II on FRK and JNK activities in neurons cultured from newborn rat hypothalamus and brain stem, which include a population of catecholaminergic cells containing AT1 receptors. Ang II caused time-dependent increases in the activation of FRK and JNK, effects completely inhibited by the AT1 receptor antagonist losartan but not by the Ang II type 2 (AT2) receptor blocker PD123,319. The stimulation of FRK activity by Ang II was abolished by the protein kinase C (PKC) inhibitor GF109203X or the calcium chelator BAPTA, but not by inhibition of calmodulin or calcium/calmodulin-dependent protein kinase II. However, the activation of JNK by Ang II was not dependent on PKC or another calcium-dependent mechanism. These data demonstrate that Ang II stimulates activation of FRK and JNK in neuronal cells, actions that may contribute to the neuromodulatory effects of this peptide.
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Affiliation(s)
- X C Huang
- Department of Physiology, College of Medicine, University of Florida, Gainesville 32610, USA
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Abstract
A simple strategy using selective codon optimization was devised to express mouse c-Fos protein in high levels in E. coli. Ten arginine codons located in the basic region were optimized to achieve high levels of protein expression. The c-Fos protein was purified to near homogeneity and was demonstrated to be biologically active by assaying its several biological activities.
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Affiliation(s)
- T Deng
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Florida, Gainesville 32610-0245, USA.
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Wang DS, Deng T, Shaw G. Membrane binding and enzymatic activation of a Dbl homology domain require the neighboring pleckstrin homology domain. Biochem Biophys Res Commun 1997; 234:183-9. [PMID: 9168986 DOI: 10.1006/bbrc.1997.6589] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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: 02/04/2023]
Abstract
Dbl-homology (DH) domains are invariably located immediately N-terminal to a pleckstrin homology (PH) domain. To understand the functional relationship between these two domains we expressed the DH domain alone, the PH domain alone, and the DH-PH combination of the invasion inducing protein Tiam-1 fused to glutathione-S-transferase (GST) or green fluorescent protein (GFP). We found that the GST-DH-PH and the GST-PH constructs bind to preparations of brain membranes and to the beta gamma subunits of trimeric G proteins in vitro, while the GST-DH and GST control do not. The GFP-DH-PH and GFP-PH constructs are localized to peripheral membranes of COS-7 cells in vivo, while GFP and GFP-DH domain constructs are found diffusely in the cytoplasm. The DH-PH domain combination activates Jun N-terminal kinase (JNK) strongly, but the DH domain alone and the PH domain alone have little effect. We conclude that membrane localization and enzymatic activation of the DH domain require the adjacent PH domain.
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Affiliation(s)
- D S Wang
- Department of Neuroscience, University of Florida College of Medicine, Gainesville 32610, USA
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Abstract
Structurally related serine/threonine kinases recognize similar phosphoacceptor peptides in vitro yet in vivo, they phosphorylate distinct substrates. To understand the basis for this specificity, we studied the interaction between the Jun kinases (JNKs) and Jun proteins. JNKs phosphorylate c-Jun very efficiently, JunD less efficiently, but they do not phosphorylate JunB. Effective JNK substrates require a separate docking site and specificity-conferring residues flanking the phosphoacceptor. The docking site increases the efficiency and specificity of the phosphorylation reaction. JunB has a functional JNK docking site but lacks specificity-conferring residues. Insertion of such residues brings JunB under JNK control. JunD, by contrast, lacks a JNK docking site, but its phosphoacceptor peptide is identical to that of c-Jun. Substrates such as JunD can be phosphorylated by JNK through heterodimerization with docking competent partners. Therefore, heterodimerization can affect the recognition of transcription factors by signal-regulated protein kinases.
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Affiliation(s)
- T Kallunki
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla 92093-0636, USA
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Abstract
Transcription factors and cofactors play critical roles in cell growth and differentiation. Alterations of their activities either through genetic mutations or by viral oncoproteins often result in aberrant cell growth and tumorigenesis. The transcriptional cofactor p300 has recently been shown to be complexed with transcription factors YY1 and CREB. Adenovirus E1A oncoproteins target these transcription complexes via physical interactions with p300, resulting in alterations of transcription mediated by these transcription factors. Here we show that p300 is also critical for repression by E1A of the activities of cJun and JunB, two members of the AP-1 transcriptional complexes. This repressive effect of E1A is dependent on the p300-binding domain of E1A and can be relieved by overexpression of p300. These results suggest that p300 serves as a mediator protein for downregulation of AP-1 activity by E1A. This hypothesis was further supported by the following observations: (i) in the absence of E1A, overexpression of p300 stimulated transcription both through an AP-1 site present in the collagenase promoter and through Jun proteins in GAL4 fusion protein-based assays; and (ii) overexpression of a mutant p300 lacking the E1A-interacting domain reduced the responsiveness of Jun-dependent transcription to E1A repression. As predicted from the functional results, p300 physically interacted with the Jun proteins. These findings thus established that p300 is a cofactor for cJun and JunB. We propose that p300 is a common mediator protein through which E1A gains control over multiple transcriptional regulatory pathways in the host cells.
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Affiliation(s)
- J S Lee
- Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115, USA
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Yoshioka K, Deng T, Cavigelli M, Karin M. Antitumor promotion by phenolic antioxidants: inhibition of AP-1 activity through induction of Fra expression. Proc Natl Acad Sci U S A 1995; 92:4972-6. [PMID: 7761434 PMCID: PMC41829 DOI: 10.1073/pnas.92.11.4972] [Citation(s) in RCA: 176] [Impact Index Per Article: 6.1] [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: 01/27/2023] Open
Abstract
Induction of phase 2 detoxification enzymes by phenolic antioxidants can account for prevention of tumor initiation but cannot explain why these compounds inhibit tumor promotion. Phase 2 genes are induced through an antioxidant response element (ARE). Although the ARE resembles an AP-1 binding site, we show that the major ARE binding and activating protein is not AP-1. Interestingly, AP-1 DNA binding activity was induced by the phenolic antioxidant tert-butylhydroquinone (BHQ), but the induction of AP-1 transcriptional activity by the tumor promoter 12-O-tetradecanoylphorbol 13-acetate (TPA) was inhibited by this compound. BHQ induced expression of c-jun, junB, fra-1, and fra-2, which encode AP-1 components, but was a poor inducer of c-fos and had no effect on fosB. Like c-Fos and FosB, the Fra proteins heterodimerize with Jun proteins to form stable AP-1 complexes. However, Fra-containing AP-1 complexes have low transactivation potential. Furthermore, Fra-1 repressed AP-1 activity induced by either TPA or expression of c-Jun and c-Fos. We therefore conclude that inhibitory AP-1 complexes composed of Jun-Fra heterodimers, induced by BHQ, antagonize the transcriptional effects of the tumor promoter TPA, which are mediated by Jun-Fos heterodimers. Since AP-1 is an important mediator of tumor promoter action, these findings may explain the anti-tumor-promoting activity of phenolic antioxidants.
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Affiliation(s)
- K Yoshioka
- Department of Pharmacology, University of California, San Diego, La Jolla 92093-0636, USA
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46
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Deng T, Chen NL, Jia KM. [A study of the relationship between expression of IGF-II, IGF-IIR, HBxAg and the DNA ploidy, cell cycle of hepatocytes in hepatocarcinoma]. Zhonghua Nei Ke Za Zhi 1994; 33:743-6. [PMID: 7600862] [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
In order to study the role of insulin-like growth factor II (IGF-II) in the development of hepatocarcinoma (HCC), the expression of IGF-II, IGF-II receptor (IGF-IIR) and HBxAg in HCC was studied with immunohistochemistry (PAP method). Meanwhile DNA ploidy and S-phase fraction of hepatocytes were analyzed with flow cytometry. The results were as follows: (1) IGF-II, IGF-IIR and HBxAg showed positive staining simultaneously in the tumor tissues of 93% (n = 15) of the HCC cases with chronic liver disease and with positive evidence of HBV; (2) The mean S-phase incidence in tissues of IGF-II positive HCC was 28.6 +/- 6.4%; this was higher than 12.8 +/- 2.4% in the IGF-II negative tumors (P < 0.05); (3) The incidence of DNA-aneuploidy in IGF-II positive liver tissues was 100% (10/10); this was higher than 60% (6/10) in IGF-II negative liver tissues (P < 0.05). It is suggested that IGF-II might play an important role in the development of HCC when there is evidence of HBV and chronic liver disease involvement. IGF-II positive staining HCC have increased proliferative activity as compared with IGF-II negative staining tumors.
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Affiliation(s)
- T Deng
- Institute of Liver Disease, PLA, Beijing
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47
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Abstract
Ras proteins exert their mitogenic and oncogenic effects through activation of downstream protein kinases. An important question is how Ras-generated signals reach the nucleus to activate downstream target genes. AP-1, a heterodimeric complex of Jun and Fos proteins, which activates mitogen-inducible genes, is a major nuclear target of Ras. Ras can stimulate AP-1 activity by inducing c-fos transcription, a process which is probably mediated by the ERK1 and -2 mitogen-activated protein (MAP) kinases, which phosphorylate the transcription factor Elk-1/TCF. Besides inducing transcription from fos and jun genes, mitogens and Ras proteins enhance AP-1 activity through phosphorylation of c-Jun. Phosphorylation of the c-Jun activation domain leads to c-jun induction through an autoregulatory loop. Ras- and ultra-violet-responsive protein kinases that phosphorylate c-Jun on serine residues at positions 63 and 73 and stimulate its transcriptional activity have been identified. These proline-directed kinases, termed JNKs, are novel MAP kinases. It is not clear, however, whether c-Jun is the only recipient and JNK the only transducer of the Ras signal to AP-1 proteins. A short sequence surrounding the major JNK phosphorylation site of c-Jun is conserved in c-Fos and is part of its activation domain, suggesting that c-Fos may be similarly regulated. Here we show that Ras does indeed augment the transcriptional activity of c-Fos through phosphorylation at Thr 232, the homologue of Ser 73 of c-Jun. However, this is mediated by a novel Ras- and mitogen-responsive proline-directed protein kinase that is different from JNKs and ERKs. Therefore, at least three types of proline-directed kinases transmit Ras- and mitogen-generated signals to the transcriptional machinery.
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Affiliation(s)
- T Deng
- Department of Pharmacology, University of California at San Diego School of Medicine, La Jolla 92093-0636
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48
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Trejo J, Massamiri T, Deng T, Dewji NN, Bayney RM, Brown JH. A direct role for protein kinase C and the transcription factor Jun/AP-1 in the regulation of the Alzheimer's beta-amyloid precursor protein gene. J Biol Chem 1994; 269:21682-90. [PMID: 8063812] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Overexpression of the beta-amyloid precursor protein gene (beta-APP) may contribute to the abnormal generation of beta-amyloid protein in Alzheimer's disease. We demonstrate using a human glial cell line (1321N1) that activation of protein kinase C (PKC) with phorbol 12-myristate 13-acetate (PMA) increases beta-APP mRNA levels, induces known components of the transcription factor activator protein-1 (AP-1), and increases protein-DNA binding activity to AP-1 sequences within the beta-APP promoter. A beta-APP promoter-luciferase reporter gene is transcriptionally activated by PMA, as well as by expression of constitutively activated PKC or by expression of c-Jun. Further characterization suggests that the distal but not the proximal AP-1 recognition site binds nuclear proteins regulated by PKC, and that the AP-1 binding activity is likely to be composed of Jun-Jun homodimers rather than Jun-Fos heterodimers. Additional studies demonstrate that a single copy of the distal AP-1 site fused to a heterologous promoter is sufficient to confer a response to PMA. Mutagenesis of this site in the beta-APP promoter renders it unresponsive to c-Jun and attenuates transcriptional activation by PMA. We suggest that cellular mediators that activate PKC, particularly those that induce significant increases in c-Jun, may up-regulate expression of the beta-APP gene and consequently affect production and processing of this protein.
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Affiliation(s)
- J Trejo
- Department of Pharmacology, University of California, San Diego, School of Medicine, La Jolla 92093
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49
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Dérijard B, Hibi M, Wu IH, Barrett T, Su B, Deng T, Karin M, Davis RJ. JNK1: a protein kinase stimulated by UV light and Ha-Ras that binds and phosphorylates the c-Jun activation domain. Cell 1994; 76:1025-37. [PMID: 8137421 DOI: 10.1016/0092-8674(94)90380-8] [Citation(s) in RCA: 2579] [Impact Index Per Article: 86.0] [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: 01/29/2023]
Abstract
The ultraviolet (UV) response of mammalian cells is characterized by a rapid and selective increase in gene expression mediated by AP-1 and NF-kappa B. The effect on AP-1 transcriptional activity results, in part, from enhanced phosphorylation of the c-Jun NH2-terminal activation domain. Here, we describe the molecular cloning and characterization of JNK1, a distant relative of the MAP kinase group that is activated by dual phosphorylation at Thr and Tyr during the UV response. Significantly, Ha-Ras partially activates JNK1 and potentiates the activation caused by UV. JNK1 binds to the c-Jun transactivation domain and phosphorylates it on Ser-63 and Ser-73. Thus, JNK1 is a component of a novel signal transduction pathway that is activated by oncoproteins and UV irradiation. These properties indicate that JNK1 activation may play an important role in tumor promotion.
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Affiliation(s)
- B Dérijard
- Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biology, University of Massachusetts Medical School, Worcester 01605
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50
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Abstract
A novel type of hormone-responsive element (HRE) is described. Unlike classical HREs, this element, RSV-T3RE (found in Rous sarcoma virus-long terminal repeat), mediates strong activation by the c-ErbA alpha thyroid hormone (T3) receptor in the absence of T3, and addition of T3 reverses this response. Whereas both c-ErbA alpha and v-ErbA are potent ligand-independent activators through the RSV-T3RE, c-ErbA beta is not. The RSV-T3RE is recognized and activated by either c-ErbA alpha homodimers or c-ErbA alpha/retinoid X receptor (RXR) heterodimers. Ligand-independent activation by c-ErbA alpha depends on a unique N-terminal activation domain, while the C-terminal activation domain is not absolutely required. Ligand-dependent activation, on the other hand, requires the C-terminal but not the N-terminal activation domain. Upon binding to the RSV-T3RE, c-ErbA alpha assumes a different conformation than when bound to a classical T3RE. c-ErbA alpha is therefore capable of selective deployment of activation domains, dictated both by the HRE with which it interacts and by T3 binding.
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Affiliation(s)
- F Saatcioglu
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla 92093-0636
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