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Zeng K, Zhang F, Yang H, Zha X, Fang S. Laparoscopic versus open surgery in obstructive colorectal cancer patients following stents placement: a comprehensive meta-analysis of cohort studies. Surg Endosc 2024; 38:1740-1757. [PMID: 38443501 PMCID: PMC10978680 DOI: 10.1007/s00464-024-10710-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 01/21/2024] [Indexed: 03/07/2024]
Abstract
BACKGROUND Over the past decade, the use of stent placement as a bridge to surgery (BTS) has emerged as an alternative to emergency surgery for patients with (OCRC). However, the optimal surgical approach remains indeterminate. This study seeks to evaluate the safety and feasibility of a combined treatment modality involving stent placement and laparoscopic surgery for OCRC presenting with malignant obstruction. METHODS A comprehensive search of PubMed, Cochrane Library, EMBASE, Web of Science, and ClinicalTrials.gov was conducted until June 2023 to identify studies that compared laparoscopic to open surgery in patients with OCBC following stent insertion. RESULTS The meta-analysis incorporated 12 cohort studies, encompassing 933 patients. There was no statistically significant difference in the 30-day mortality rates between the two groups (relative risk [RR], 1.09; 95% confidence interval [CI] 0.26 to 4.48; P = 0.95). Compared to the laparoscopic approach group, the open approach group had a higher rate of overall postoperative complications (POCs) (RR 0.52; 95% CI 0.37 to 0.72, P < 0.0001). There was no significant variance in lymph node (LN) dissection number between the groups (mean differences [MD], 1.64; 95% CI - 1.51 to 4.78; P = 0.31). Notably, laparoscopic surgery resulted in less intraoperative blood loss (MD, - 25.84 ml; 95% CI - 52.16 to 0.49; P = 0.05) and a longer operation time (MD, 20.99 mins; 95% CI 2.31 to 39.44; P = 0.03). The laparoscopic approach was associated with a shorter length of hospital stay (LOS) (MD - 3.29 days; 95% CI - 5.27 to 1.31; P = 0.001). Conversely, the open approach group had a higher rate of postoperative surgical site infection (SSI) (RR 0.47; 95% CI 0.23 to 0.96, P = 0.04). Although the number of included studies was insufficient to conduct a meta-analysis, several of them imply that laparoscopic surgery may yield more favorable outcomes in terms of the 3-year overall survival rate (OS), 3-year disease-free survival rate (DFS), 5-year OS, and 5-year DFS when compared to open surgery. It is worth noting that these differences lack statistical significance. CONCLUSION In patients with OCRC subjected to stent insertion, laparoscopic surgery arguably presents a modest superiority over open surgery by diminishing the overall postoperative risk and potentially reducing the LOS.
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Affiliation(s)
- Kerui Zeng
- Department of Colorectal Anal Surgery, Zigong Fourth People's Hospital, Zigong, Sichuan, China.
- Department of General Surgery, Zigong Fourth People's Hospital, No.282, Dangui Street, Ziliujing District, Zigong, 643000, Sichuan, People's Republic of China.
| | - Faqiang Zhang
- Department of Colorectal Anal Surgery, Zigong Fourth People's Hospital, Zigong, Sichuan, China
| | - Hua Yang
- Department of Colorectal Anal Surgery, Zigong Fourth People's Hospital, Zigong, Sichuan, China
| | - Xiaoying Zha
- Department of Wound Care Center, Department of Colorectal Anal Surgery, Zigong Fourth Hospital, Zigong, Sichuan, China
| | - Shixu Fang
- Department of Colorectal Anal Surgery, Zigong First People's Hospital, Zigong, Sichuan, China
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Guan R, Zeng K, Liu YQ, Liu CY, Li JW, Zhang B, Jiang HQ, Gao MN, Zhang LU, Li JF, Zhang Q, Yang MO, Yang Y. Potential role of circulating exosome miRNAs in left ventricular remodeling of patients with ST-segment elevation myocardial infarction. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Left ventricular remodeling (LVR) in patients with ST-segment elevation myocardial infarction (STEMI) may lead to poor prognosis in which circulating exosome miRNAs play a critical role. The aim of the present study is to identify specific exosome miRNAs for LVR in patients with STEMI.
Method
Plasma exosome miRNAs were assessed in 20 patients (90% male, mean age of 66.95±1.65 years) 3–6 months after STEMI and 24 healthy individuals (83% male, mean age of 33.2±0.93 years) by using qPCR. Of the 20 patients, 8 had post-STEMI LVR according to echocardiographic evaluation, and the others did not. Clinical biochemical data including total cholesterol, HDL-C, LDL-C, LDH and NT-pro-BNP were collected from the patients with STEMI at same time as exosome miRNAs assessment. Specific exosome miRNAs for LVR were identified by using qPCR. Correlations between the dysregulated exosome miRNAs and the clinical biochemical parameters in patients with STEMI were analyzed using spearman correlation test.
Results
Five exosome miRNAs including hsa-miR-181a-3p (p<0.05, fold change = 0.59), let-7d-3p (p=0.01, fold change = 0.51), hsa-miR-224-5p (p<0.01, fold change = 0.11), hsa-miR-23a-3p (p<0.01, fold change = 1.42) and miR-874-3p (p<0.01, fold change = 0.48) were dysregulated in the post-STEMI patients comparing with the healthy individuals. Among them, the exosome miR-181a-3p (p=0.01, fold change = 0.09) and let-7d-3p (p=0.01, fold change = 0.16) were significantly lower expressed in patients with LVR compared to those without (Figure 1). There was no significant difference in expression of the other three miRNAs between patients with and without LVR. Exosome hsa-miR-874-3p positively associated with LDH (p<0.01, r=0.50) in all the patients with STEMI. In vitro cell culture confirmed that the miR-874-3p mimics upregulated expression of apoptosis related gene BMF (p<0.05, fold change = 1.7) in cardiomyocyte. Exosome hsa-miR-23a-3p and hsa-miR-224-5p positively correlated with both HDL-C (p<0.01, r=0.61; p=0.02, r=0.50) and LDL-C (p=0.02, r=0.50; p<0.05, r=0.52) in all patients with STEMI. No correlation between the dysregulated exosome miRNAs and cholesterol or NT-ProBNP was observed (Figure 2).
Conclusions
Circulating exosome miR-181a-3p and let-7d-3p might play a potential role in LVR in patients 3–6 months after STEMI. Exosome hsa-miR-874-3p might be associated with cardiomyocyte injury. Hsa-miR-23a-3p and hsa-miR-224-5p demonstrated an activity in regulation of lipid metabolism and biosynthesis in patients with STEMI.
Funding Acknowledgement
Type of funding sources: Public hospital(s). Main funding source(s): This work was supported by grants from the 3×3 Clinical Scientist Fund of Sun Yat-sen Memorial Hospital
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Affiliation(s)
- R Guan
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - K Zeng
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - Y Q Liu
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - C Y Liu
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - J W Li
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - B Zhang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - H Q Jiang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - M N Gao
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - L U Zhang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - J F Li
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
| | - Q Zhang
- Sun Yat-sen University, School of Life Sciences , Guangzhou , China
| | - M O Yang
- Sun Yat-sen University, The 7th affiliated hospital, Shenzhen campus , Guangzhou , China
| | - Y Yang
- Second Affiliated Hospital of Sun Yat-sen University , Guangzhou , China
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Meetschen M, Haubold J, Zeng K, Farhand S, Stalke S, Steinberg H, Bos D, Kureishi A, Zensen S, Goeser T, Maier S, Forsting M, Umutlu L, Nensa F. KI als Co-Pilot: Inhaltsbasierte Bildsuche zur Erkennung seltener Krankheiten in der Thorax-CT. ROFO-FORTSCHR RONTG 2022. [DOI: 10.1055/s-0042-1749760] [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: 11/07/2022]
Affiliation(s)
- M Meetschen
- Uniklinik Essen, Institut für Diagnostische und Interventionelle Radiologie u, Essen
| | - J Haubold
- Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Essen, Essen
| | - K Zeng
- Siemens Medical Solutions Inc., Malvern, PA
| | - S Farhand
- Siemens Medical Solutions Inc., Malvern, PA
| | - S Stalke
- Georg Thieme Verlag KG, Stuttgart
| | - H Steinberg
- Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Essen, Universitätsklinikum Essen, Essen
| | - D Bos
- Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Essen, Essen
| | - A Kureishi
- Institut für Künstliche Intelligenz in der Medizin, Universitätsklinikum Essen, Essen
| | - S Zensen
- Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Essen, Essen
| | - T Goeser
- Radiologie und Neuroradiologie, Kliniken Maria Hilf GmbH, Mönchengladbach
| | - S Maier
- Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Essen, Essen
| | - M Forsting
- Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Essen, Essen
| | - L Umutlu
- Institut für Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitätsklinikum Essen, Essen
| | - F Nensa
- Institut für Künstliche Intelligenz in der Medizin, Universitätsklinikum Essen, Essen
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Yang XM, Liang Y, Zhong ZJ, Tao X, Yang YK, Zhang P, Wang Y, Lei YF, Chen XH, Zeng K, Gong JJ, Ying SC, Zhang JL, Pang JH, Lv XB, Gu YR, He ZP. Comparison of long non-coding RNAs in adipose and muscle tissues between seven indigenous Chinese and the Yorkshire pig breeds. Anim Genet 2021; 52:645-655. [PMID: 34324723 DOI: 10.1111/age.13123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/02/2021] [Indexed: 12/01/2022]
Abstract
lncRNAs play crucial roles in fat metabolism in animals. Previously, we have compared the mRNA transcriptome profiles between seven fat-type Chinese pig breeds and one lean-type Western breed (Yorkshire, YY). The associations between differentially expressed (DE) genes and phenotypical traits were investigated. In the present study, to further explore the underlying regulatory mechanisms, lncRNAs were sequenced and compared between YY and Chinese indigenous breeds. The results showed 9114 and 7538 DE lncRNAs between at least one Chinese breed and the YY breed in the adipose and muscle tissue respectively. KEGG enrichment analysis revealed that the target genes of these DE lncRNAs mainly influenced the glucolipid metabolism, which is an important process affecting meat quality. Correlation analyses between the DE lncRNA and DE mRNA genes related to meat quality and growth traits were performed. The results showed that LTCONS_00073280 was associated with intramuscular fat content. Four lncRNAs (LTCONS_00101781, LTCONS_00037879, LTCONS_00088260 and LTCONS-00128343) might mediate backfat thickness. Overall, this study provides candidate lncRNAs that potentially affect meat quality, which might be useful for molecular breeding of pig breeds in future.
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Affiliation(s)
- X-M Yang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - Y Liang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - Z-J Zhong
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - X Tao
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - Y-K Yang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - P Zhang
- Chengdu Agricultural Technology Vocational College, Chengdu, Sichuan, 610000, China
| | - Y Wang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - Y-F Lei
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - X-H Chen
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - K Zeng
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - J-J Gong
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - S-C Ying
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - J-L Zhang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - J-H Pang
- Chengdu Biotechservice Institute, Chengdu, Sichuan, 610000, China
| | - X-B Lv
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - Y-R Gu
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
| | - Z-P He
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, Sichuan, 610000, China
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5
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Xiao H, Zeng K, Hu JH, Yang G. Multiple cooperative systems obtained by powder metallurgy-like processing method: Adenine containing phthalonitrile/graphene/ Fe3O4 high-performance composites with ultra-high EMI shielding. EXPRESS POLYM LETT 2021. [DOI: 10.3144/expresspolymlett.2021.63] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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6
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Xu MN, Li L, Pan W, Dai SQ, Wang Q, Wang ML, Zeng K, Huang XW, Eyerich K. Transferability of suggested molecular classifiers for psoriasis and eczema to the Chinese population. J Eur Acad Dermatol Venereol 2020; 35:e189-e192. [PMID: 32869356 DOI: 10.1111/jdv.16898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- M-N Xu
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - L Li
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - W Pan
- Division of Infectious Diseases, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI, USA
| | - S-Q Dai
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Q Wang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - M-L Wang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - X-W Huang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - K Eyerich
- Department of Dermatology and Allergy, Technical University of Munich, Munich, Germany
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Wang Y, Fomenko A, Nankoo J, Tran S, Zeng K, Drummond N, Lozano A, Chen R. P205 Inhibitory effects of low-intensity focused ultrasound stimulation on the contralateral primary motor cortex. Clin Neurophysiol 2020. [DOI: 10.1016/j.clinph.2019.12.316] [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: 10/24/2022]
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8
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Liang Y, Wang Y, Ma L, Zhong Z, Yang X, Tao X, Chen X, He Z, Yang Y, Zeng K, Kang R, Gong J, Ying S, Lei Y, Pang J, Lv X, Gu Y. Comparison of microRNAs in adipose and muscle tissue from seven indigenous Chinese breeds and Yorkshire pigs. Anim Genet 2019; 50:439-448. [PMID: 31328299 DOI: 10.1111/age.12826] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2019] [Indexed: 01/29/2023]
Abstract
Elucidation of the pig microRNAome is essential for interpreting functional elements of the genome and understanding the genetic architecture of complex traits. Here, we extracted small RNAs from skeletal muscle and adipose tissue, and we compared their expression levels between one Western breed (Yorkshire) and seven indigenous Chinese breeds. We detected the expression of 172 known porcine microRNAs (miRNAs) and 181 novel miRNAs. Differential expression analysis found 92 and 12 differentially expressed miRNAs in adipose and muscle tissue respectively. We found that different Chinese breeds shared common directional miRNA expression changes compared to Yorkshire pigs. Some miRNAs differentially expressed across multiple Chinese breeds, including ssc-miR-129-5p, ssc-miR-30 and ssc-miR-150, are involved in adipose tissue function. Functional enrichment analysis revealed that the target genes of the differentially expressed miRNAs are associated mainly with signaling pathways rather than metabolic and biosynthetic processes. The miRNA-target gene and miRNA-phenotypic traits networks identified many hub miRNAs that regulate a large number of target genes or phenotypic traits. Specifically, we found that intramuscular fat content is regulated by the greatest number of miRNAs in muscle tissue. This study provides valuable new candidate miRNAs that will aid in the improvement of meat quality and production.
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Affiliation(s)
- Y Liang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - Y Wang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - L Ma
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, 610052, Sichuan Province China
| | - Z Zhong
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - X Yang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - X Tao
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - X Chen
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - Z He
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - Y Yang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - K Zeng
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - R Kang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - J Gong
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - S Ying
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - Y Lei
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - J Pang
- Chengdu Biotechservice Institute, Chengdu, 610041, Sichuan Province China
| | - X Lv
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
| | - Y Gu
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, 610066, Sichuan Province China
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9
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Huang X, Pan W, Zeng K, Mylonakis E. 719 The effect and irritation of adapalene on Cutibacterium acnes via HTS. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.795] [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: 10/27/2022]
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10
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Zhang W, Wei S, Peng X, Xie S, Zeng K, Lai K. Proliferative Sweet syndrome associated with pregnancy and low-molecular-weight heparin sodium. Scand J Rheumatol 2019; 48:428-429. [PMID: 30907689 DOI: 10.1080/03009742.2019.1575979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- W Zhang
- Department of Dermatology, Nanfang Hospital, Southern Medical University , Guangzhou , China
| | - S Wei
- Department of Dermatology, Zhujiang Hospital, Southern Medical University , Guangzhou , China
| | - X Peng
- Department of Dermatology, Nanfang Hospital, Southern Medical University , Guangzhou , China
| | - S Xie
- Department of Dermatology, Nanfang Hospital, Southern Medical University , Guangzhou , China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University , Guangzhou , China
| | - K Lai
- Department of Dermatology, Nanfang Hospital, Southern Medical University , Guangzhou , China
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11
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Wei S, Xie S, Yang Z, Peng X, Gong L, Zhao K, Zeng K, Lai K. Allogeneic adipose-derived stem cells suppress mTORC1 pathway in a murine model of systemic lupus erythematosus. Lupus 2018; 28:199-209. [PMID: 30572770 DOI: 10.1177/0961203318819131] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The aim of our study was to investigate the efficacy of adipose-derived stem cells (ADSC) transplantation in systemic lupus erythematosus (SLE) and to determine the mechanism of ADSC transplantation. METHODS B6.MRL/lpr mice were administered ADSC intravenously every week from age 28 to 31 weeks, while the lupus control group and the normal control received phosphate buffered solution (PBS) on the same schedule. RESULTS Compared with the lupus control group, the ADSC treatment group had a significant improvement of histologic abnormalities, serologic abnormalities, and immunologic function. Anti-double-stranded DNA antibodies, spleen/weight ratio, deposits of C3/IgG in the kidney, and serum creatinine and blood urea nitrogen levels were significantly decreased with the transplantation of ADSC. A significant decrease of the Th17/CD4+ T cell ratio in the spleen, the serum IL-17 concentration, as well as renal IL-17 expression was observed in the ADSC treatment group. Western blot results also showed that ADSC treatment had a lower expression of protein kinase B (Akt), p-Akt, mTOR, p-mTOR, p70S6K, p-p70S6K, and HIF-1α. CONCLUSION ADSC treatment can prevent the development of lupus nephritis and significantly ameliorate already-established disease. ADSC treatment reduced Akt, mTOR, p70S6K, HIF-1α, and that this inhibition can avert IL-17-induced inflammation, suggesting that ADSC may be a promising treatment for SLE.
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Affiliation(s)
- S Wei
- 1 Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - S Xie
- 1 Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Z Yang
- 1 Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - X Peng
- 1 Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - L Gong
- 2 Experimental Animal Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - K Zhao
- 3 Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - K Zeng
- 1 Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - K Lai
- 1 Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
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12
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Li CX, Zhang SQ, Wen J, Chen PJ, Liu QX, Han K, Zeng K, Zhang XB. A sporadic case of Nagashima-type palmoplantar keratosis caused by gene mutation in SERPINB7. Clin Exp Dermatol 2018; 41:811-3. [PMID: 27663160 DOI: 10.1111/ced.12849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/06/2015] [Indexed: 11/28/2022]
Affiliation(s)
- C-X Li
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong, China.,Department of Dermatology, Dongguan No. 6 People's Hospital, Guangzhou, Guangdong, China
| | - S-Q Zhang
- Guangzhou Institute of Dermatology, Guangzhou, China.,Institute of Dermatology, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - J Wen
- Department of Dermatology, Guangdong No. 2 Provincial People's Hospital, Guangzhou, Guangdong, China
| | - P-J Chen
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong, China
| | - Q-X Liu
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong, China
| | - K Han
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong, China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong, China
| | - X-B Zhang
- Guangzhou Institute of Dermatology, Guangzhou, China. .,Institute of Dermatology, Guangzhou Medical University, Guangzhou, Guangdong, China.
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13
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Chen P, Sun S, Zeng K, Li C, Wen J, Liang J, Tian X, Jiang Y, Zhang J, Zhang S, Han K, Han C, Zhang X. Exome sequencing identifies a TCF4 mutation in a Chinese pedigree with symmetrical acral keratoderma. J Eur Acad Dermatol Venereol 2017; 32:1204-1208. [PMID: 28921696 DOI: 10.1111/jdv.14591] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 08/01/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND Symmetrical acral keratoderma (SAK) is a rare skin disorder and its pathogenesis and inheritability are unknown. OBJECTIVES To investigate the inheritance and pathogenesis of SAK. METHODS Four SAK cases occurred in a four-generation Chinese family. Exome sequencing identified SNPs with potential SAK-related mutations, and a potentially responsible gene transcription factor 4 (TCF4) was identified. TCF4 was then sequenced in all 11 family members, and pedigree analysis was performed. Histopathology and immunohistochemistry evaluated TCF4 expression in skin lesions. The gene mutation was investigated in human keratinocytes for keratin-related protein expression. RESULTS A novel heterozygous missense mutation, c.85C>A (p.Pro29Thr) was found in TCF4. The mutation showed autosomal dominant inheritance and perfectly cosegregated with the SAK phenotype in all family members. In skin lesions, TCF4 was present in the cytoplasm and membranes of the basal layer, the stratum spinosum and the stratum granulosum of the epidermis. The mutant TCF4 induced overexpression of differentiation markers including KRT1, KRT14, loricrin and involucrin. CONCLUSIONS A SAK-related gene mutation in TCF4 may function through transcriptional regulation of keratin.
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Affiliation(s)
- P Chen
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Provice, China
| | - S Sun
- Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong Provice, China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Provice, China
| | - C Li
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Provice, China.,Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong Provice, China
| | - J Wen
- Department of Dermatology, Guangdong No.2 Provincial People's Hospital, Guangzhou, Guangdong Provice, China
| | - J Liang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China
| | - X Tian
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China
| | - Y Jiang
- Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong Provice, China
| | - J Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China
| | - S Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China
| | - K Han
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Provice, China
| | - C Han
- Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong Provice, China
| | - X Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China
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14
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Liu B, Zhang C, Zeng K, Tu P, Jiang Y. Bioactive coumarin derivatives from Murraya exotica. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608108] [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: 10/18/2022]
Affiliation(s)
- B Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - C Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - K Zeng
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - P Tu
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | - Y Jiang
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
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15
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Xiao YJ, Diao QC, Liang YH, Zeng K. Two novel Co(II) complexes with two different Schiff bases: inhibiting growth of human skin cancer cells. ACTA ACUST UNITED AC 2017; 50:e6390. [PMID: 28678922 PMCID: PMC5496159 DOI: 10.1590/1414-431x20176390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 02/08/2017] [Accepted: 04/27/2017] [Indexed: 11/22/2022]
Abstract
Using two flexible Schiff bases, H2L1 and H2L2, two new cobalt II (Co(II))-coordination compounds, namely, Py3CoL1 (1) and Py3CoL2 (2) (Py=pyridine, L1=3,5-ClC6H2(O)C=NC6H3(O)-4-NO2, L2=3,5-BrC6H2(O)C=NC6H3(O)-4-NO2) have been synthesized under solvothermal conditions. Single crystal X-ray structural analysis revealed that compounds 1 and 2 are both six-coordinate in a distorted octahedral geometry, and the 1D chain structure was formed by the π…π and C-H…O interactions or C-H…Cl interaction. The in vitro antitumor activities of 1, 2 and their corresponding organic ligands Py, L1, and L2 were studied and evaluated, in which three human skin cancer cell lines (A-431, HT-144 and SK-MEL-30) were used in the screening tests.
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Affiliation(s)
- Y-J Xiao
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Department of Dermatology, The Chongqing Hospital of Traditional Chinese Medicine (The First People's Hospital of Chongqing City), Chongqing, China
| | - Q-C Diao
- Department of Dermatology, The Chongqing Hospital of Traditional Chinese Medicine (The First People's Hospital of Chongqing City), Chongqing, China
| | - Y-H Liang
- Department of Dermatology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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16
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Li CX, Sun SL, Liang JY, Yuan YQ, Zhang SQ, Chen PJ, Zeng K, Xie XF, Zhang XB. A novel non-frameshift deletion in MVK gene responsible for disseminated superficial actinic porokeratosis in one Chinese family. J Eur Acad Dermatol Venereol 2017; 31:e510-e512. [PMID: 28543715 DOI: 10.1111/jdv.14360] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- C-X Li
- Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong, China
| | - S-L Sun
- Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong, China
| | - J-Y Liang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong, China
| | - Y-Q Yuan
- Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong, China
| | - S-Q Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong, China
| | - P-J Chen
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - X-F Xie
- Department of Dermatology, Dongguan Sixth People's Hospital, Dongguan, Guangdong, China
| | - X-B Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong, China
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17
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Abstract
We performed a meta-analysis to identify the association between systemic lupus erythematosus (SLE) and preterm birth. In this study, we studied the effects of SLE, SLE disease activity, a history of nephritis and active nephritis on preterm birth. Searches were conducted before 20 May 2016 of PubMed, Embase, Medline and Cochrane Library of literature and article reference lists. Eleven observational case-control studies and thirteen cohort studies met the inclusion criteria. The pooled relative risk (RR) for the risk of preterm birth in SLE patients versus controls was 2.05 (95% confidence interval (CI): 1.72-3.32); for active SLE patients versus inactive was 2.98 (95% CI: 2.32-3.83); for SLE patients with a history of lupus nephritis versus those without nephritis it was 1.62 (95% CI: 1.35-1.95); and for SLE patients with active nephritis versus those with quiescent nephritis it was 1.78 (95% CI: 1.17-2.70). In summary, this study identified a significant association in the above results. This association was more significant in active SLE patients versus inactive. With respect to SLE itself, active inflammation (such as disease activity) may be more hazardous for the management of the pregnancy. This suggests that it is essential to control disease activity in order to achieve a better outcome of SLE pregnancy.
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Affiliation(s)
- S Wei
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - K Lai
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - Z Yang
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
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18
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Cheng K, Lv JB, Ma JZ, Hu JH, Chen C, Zeng K, Yang G. The curing behavior and properties of phthalonitrile resins using ionic liquids as a new class of curing agents. EXPRESS POLYM LETT 2017. [DOI: 10.3144/expresspolymlett.2017.88] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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19
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Niu X, Deng L, Zhou Y, Wang W, Yao S, Zeng K. Optimization of a protective medium for freeze-dried Pichia membranifaciens and application of this biocontrol agent on citrus fruit. J Appl Microbiol 2016; 121:234-43. [PMID: 26972894 DOI: 10.1111/jam.13129] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 03/03/2016] [Accepted: 03/07/2016] [Indexed: 11/30/2022]
Abstract
AIMS To optimize a protective medium for freeze-dried Pichia membranifaciens and to evaluate biocontrol efficacies of agents against blue and green mould and anthracnose in citrus fruit. METHODS AND RESULTS Based on the screening assays of saccharides and antioxidants, response surface methodology was used to optimize sucrose, sodium glutamate and skim milk to improve viability of freeze-dried Pi. membranifaciens. Biocontrol assays were conducted between fresh and freeze-dried Pi. membranifaciens against Penicillium italicum, Penicillium digitatum and Colletotrichum gloeosporioides in citrus fruit. Solving the regression equation indicated that the optimal protective medium was 6·06% (w/v) sucrose combined with 3·40% (w/v) sodium glutamate and 5·43% (w/v) skim milk. Pi. membranifaciens freeze-dried in the optimal protective medium showed 76·80% viability, and retained biocontrol efficacy against Pe. italicum, Pe. digitatum and Co. gloeosporioides in citrus fruit. CONCLUSIONS The optimal protective medium showed more effective protective properties than each of the three protectants used alone. The viability of freeze-dried Pi. membranifaciens finally reached 76·80%. Meanwhile, the biocontrol efficacies showed no significant difference between fresh and freeze-dried yeast against Pe. italicum, Pe. digitatum and Co. gloeosporioides in citrus fruit. SIGNIFICANCE AND IMPACT OF THE STUDY The results showed the potential value of Pi. membranifaciens CICC 32259 for commercialization.
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Affiliation(s)
- X Niu
- College of Food Science, Southwest University, Chongqing, China
| | - L Deng
- College of Food Science, Southwest University, Chongqing, China.,Chongqing Special Food Programme and Technology Research Center, Chongqing, China
| | - Y Zhou
- College of Food Science, Southwest University, Chongqing, China
| | - W Wang
- College of Food Science, Southwest University, Chongqing, China.,Chongqing Special Food Programme and Technology Research Center, Chongqing, China
| | - S Yao
- College of Food Science, Southwest University, Chongqing, China.,Chongqing Special Food Programme and Technology Research Center, Chongqing, China
| | - K Zeng
- College of Food Science, Southwest University, Chongqing, China.,Chongqing Special Food Programme and Technology Research Center, Chongqing, China
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20
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Chen PJ, Li CX, Wen J, Peng YS, Zeng K, Zhang SQ, Tian X, Zhang XB. S159P mutation of keratin 10 gene causes severe form of epidermolytic hyperkeratosis. J Eur Acad Dermatol Venereol 2015; 30:e102-e104. [PMID: 26373619 DOI: 10.1111/jdv.13345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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)
- P-J Chen
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong Provice, China
| | - C-X Li
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong Provice, China.,Department of Dermatology, Dongguan No.6 People's Hospital, Dongguan, Guangdong Provice, China
| | - J Wen
- Department of Dermatology, Guangdong No.2 Provincial People's Hospital, Guangzhou, Guangdong Provice, China
| | - Y-S Peng
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong Provice, China
| | - K Zeng
- Department of Dermatology, Nanfang Hospital, South Medical University, Guangzhou, Guangdong Provice, China.
| | - S-Q Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China.,Institute of Dermatology, Guangzhou Medical University, Guangzhou, Guangdong Provice, China
| | - X Tian
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China.,Institute of Dermatology, Guangzhou Medical University, Guangzhou, Guangdong Provice, China
| | - X-B Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou, Guangdong Provice, China. .,Institute of Dermatology, Guangzhou Medical University, Guangzhou, Guangdong Provice, China.
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21
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Ye L, Peng Y, Wang Y, Zeng K, Zhang JX. Pathology of the lower nasolacrimal duct mucosa at multiple time points after lacrimal retrograde catheterization in rabbit. Genet Mol Res 2015. [PMID: 26214474 DOI: 10.4238/2015.july.14.19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Lacrimal duct obstruction is a common eye disease, and obstruction of the nasolacrimal duct accounts for over 50% of these cases. Nasolacrimal duct obstruction is usually treated surgically. Lacrimal retrograde catheterization is a novel surgical approach with a high success rate and a relatively high recurrence rate. In this study, we examined the postoperative pathological changes in the lower nasolacrimal duct mucosa at multiple time points (2, 4, 6, 8, 10, 12, and 14 weeks) after retrograde lacrimal dilated drainage tube implantation in rabbits. One side of the nasolacrimal duct was obstructed in 14 rabbits. Compared to the control side, the 2-, 4-, 6-, and 8-week groups presented no obvious changes in hematoxylin and eosin (H&E)-stained tissue. The 10-week group presented isolated granulomas. The 12- and 14-week groups presented scattered granulomas. The granulomas were smaller and the density of fibroblasts was lower in the 12-week group compared with the 14-week group. Transforming growth factor-β1 immunohistochemistry resulted in strong immunoreactivity in the 14-week group and weak immunoreactivity in the 12-week group, and the difference was statistically significant (P < 0.05). Fibroblast apoptosis was observed in the 4- and 6-week groups, and disorganized fibers were observed in the 10-week group. Most fibroblasts in the 12- and 14-week groups were the active type with mechanocytes. Granulomas were induced after a long time by the implantation of silicone tubes in rabbits. Thus, recurrent obstructions of the nasolacrimal duct may be caused by granulomas, progressive fibrosis, and/or adhesion of the surrounding tissues.
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Affiliation(s)
- L Ye
- Shenzhen Eye Hospital, Ji-nan University, Shenzhen, China
| | - Y Peng
- Shenzhen Eye Hospital, Ji-nan University, Shenzhen, China
| | - Y Wang
- Shenzhen Eye Hospital, Ji-nan University, Shenzhen, China
| | - K Zeng
- Shenzhen Eye Hospital, Ji-nan University, Shenzhen, China
| | - J X Zhang
- Shenzhen Eye Hospital, Ji-nan University, Shenzhen, China
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22
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Zeng K, Flamant G, Gauthier D, Guillot E. Solar Pyrolysis of Wood in a Lab-scale Solar Reactor: Influence of Temperature and Sweep Gas Flow Rate on Products Distribution. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.egypro.2015.03.163] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Jackson BC, Campos JL, Zeng K. The effects of purifying selection on patterns of genetic differentiation between Drosophila melanogaster populations. Heredity (Edinb) 2014; 114:163-74. [PMID: 25227256 PMCID: PMC4270736 DOI: 10.1038/hdy.2014.80] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [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: 02/21/2014] [Revised: 06/16/2014] [Accepted: 07/22/2014] [Indexed: 01/21/2023] Open
Abstract
Using the data provided by the Drosophila Population Genomics Project, we investigate factors that affect the genetic differentiation between Rwandan and French populations of D. melanogaster. By examining within-population polymorphisms, we show that sites in long introns (especially those >2000 bp) have significantly lower π (nucleotide diversity) and more low-frequency variants (as measured by Tajima's D, minor allele frequencies, and prevalence of variants that are private to one of the two populations) than short introns, suggesting a positive relationship between intron length and selective constraint. A similar analysis of protein-coding polymorphisms shows that 0-fold (degenerate) sites in more conserved genes are under stronger purifying selection than those in less conserved genes. There is limited evidence that selection on codon bias has an effect on differentiation (as measured by FST) at 4-fold (degenerate) sites, and 4-fold sites and sites in 8–30 bp of short introns ⩽65 bp have comparable FST values. Consistent with the expected effect of purifying selection, sites in long introns and 0-fold sites in conserved genes are less differentiated than those in short introns and less conserved genes, respectively. Genes in non-crossover regions (for example, the fourth chromosome) have very high FST values at both 0-fold and 4-fold degenerate sites, which is probably because of the large reduction in within-population diversity caused by tight linkage between many selected sites. Our analyses also reveal subtle statistical properties of FST, which arise when information from multiple single nucleotide polymorphisms is combined and can lead to the masking of important signals of selection.
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Affiliation(s)
- B C Jackson
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - J L Campos
- Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, UK
| | - K Zeng
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
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24
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Liu R, Zhang C, Zeng K, Zhang C, Ba Y. P0221 The negative regulatory role of PGC-1α in pathogenesis of hepatocellular carcinoma. Eur J Cancer 2014. [DOI: 10.1016/j.ejca.2014.03.265] [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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25
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Zeng K, Wu XD, Cai HD, Gao YG, Li G, Liu QC, Gao F, Chen JH, Lin CZ. Correlation between the NPPB gene promoter c.-1298 G/T polymorphism site and pulse pressure in the Chinese Han population. Genet Mol Res 2014; 13:3265-74. [PMID: 24841658 DOI: 10.4238/2014.april.29.4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this study was to investigate the correlation between the natriuretic peptide precursor B (NPPB) gene single nucleotide polymorphism (SNP) c.-1298 G/T and pulse pressure (PP) of the Chinese Han population and the association between genotype and clinical indicators of hypertension. Peripheral blood was collected from 180 unrelated patients with hypertension and 540 healthy volunteers (control group), and DNA was extracted to amplify the 5'-flanking region and 2 exons of the NPPB gene by polymerase chain reaction; the fragment was sequenced after purification. The clinical data of all subjects were recorded, the distribution of the NPPB gene c.-1298 G/T polymorphism was determined, and differences in clinical indicators between the two groups were evaluated. The mean arterial pressure PP, and creatinine levels were significantly higher in the hypertension group than in the control group (P<0.05), but no other clinical indicators differed between the groups. There were no significant differences in genotype frequency and distribution of the NPPB gene c.-1298 G/T polymorphism between the hypertension group and the control group (P>0.05); in the control group, the mean PP of individuals with the SNP c.-1298 GG genotype was greater than that of individuals with the GT+TT genotype (P<0.05). In conclusion, there was no significant correlation between the NPPB gene c.-1298 G/T polymorphism and the incidence of essential hypertension in the Han population; however, the PP of the SNP c.-1298 GG genotype was greater than that of the GT+TT genotype in the control group.
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Affiliation(s)
- K Zeng
- Department of Anesthesiology, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - X D Wu
- Department of Anesthesiology, Fujian Provincial Hospital, Provincial Clinical College of Fujian Medical University, Fuzhou, Fujian, China
| | - H D Cai
- Department of Anesthesiology, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Y G Gao
- Department of Anesthesiology, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - G Li
- Department of Cardiology, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Q C Liu
- Department of Laboratory Medicine, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - F Gao
- Department of Pathology, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - J H Chen
- Department of Statistics, Fuzhou General Hospital, Fuzhou, Fujian, China
| | - C Z Lin
- Department of Anesthesiology, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
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26
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Li CX, Han CL, Zeng K, Zhang XB, Ma ZL. Clinical, demographic and histopathological features of symmetrical acral keratoderma. Br J Dermatol 2014; 170:948-51. [PMID: 24341804 DOI: 10.1111/bjd.12754] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2013] [Indexed: 11/30/2022]
Affiliation(s)
- C.-X. Li
- Department of Dermatology; Nanfang Hospital; South Medical University; Guangzhou China
- Department of Dermatology; Dongguan Institute of Dermatology; Dongguan China
| | - C.-L. Han
- Department of Dermatology; Dongguan Institute of Dermatology; Dongguan China
| | - K. Zeng
- Department of Dermatology; Nanfang Hospital; South Medical University; Guangzhou China
| | - X.-B. Zhang
- Department of Dermatology; Guangzhou Institute of Dermatology; Guangzhou China
| | - Z.-L. Ma
- Department of Dermatology; Dongguan Institute of Dermatology; Dongguan China
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27
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Zeng K, Li L, Huang L, Liang YH. Newly identified phenotypes in a FIP1L1/PDGFRA-associated paediatric HES patient: thrombocytosis, mHPA, young stroke and blindness. J Eur Acad Dermatol Venereol 2014; 29:614-6. [PMID: 24576219 DOI: 10.1111/jdv.12416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- K Zeng
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
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28
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Xiao J, Shen F, Xue Q, Chen G, Zeng K, Stone P, Zhao M, Chen Q. Is ethnicity a risk factor for developing preeclampsia? An analysis of the prevalence of preeclampsia in China. J Hum Hypertens 2014; 28:694-8. [PMID: 24430700 DOI: 10.1038/jhh.2013.148] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 12/15/2013] [Accepted: 12/18/2013] [Indexed: 12/15/2022]
Abstract
Preeclampsia is a major complication of pregnancy. Risk factors for preeclampsia include population and regional ethnicity. Chinese women living outside the Chinese mainland have a lower prevalence of preeclampsia than resident Caucasians. We performed a retrospective study to identify potential factors that may be associated with developing preeclampsia in China. A total of 67,746 pregnant women were included in this study from 2002 to 2011. Data included maternal age, maternal body mass index (BMI), age at marriage, parity, gestation and blood pressure at diagnosis, proteinuria, and birth weight. In the study period, 1301 (1.92%) nulliparous women developed preeclampsia. The prevalence of mild or severe preeclampsia was 1.42% or 0.49%, respectively. The average BMI was 21.61 kg m(-2). On the basis of the WHO BMI classification, 78.8% of women were of normal BMI, 18.3% were overweight and 2.9% were obese. A total of 37.8% of preeclamptic women had lived with the same partner for less than 1 year, which was significantly higher than those healthy pregnant women who did not develop preeclampsia (24.2%). The prevalence of preeclampsia in China is low compared with Caucasians, and the contribution to this lower prevalence may be dependent on BMI or lifestyle including period of cohabitation with the partner. Our data suggest that Chinese ethnicity may be a factor responsible for the low risk of developing preeclampsia in the populations studied.
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Affiliation(s)
- J Xiao
- Wuxi Maternity and Child Health Hospital Affiliated Nanjing Medical University, Wuxi, China
| | - F Shen
- The Hospital of Obstetrics and Gynaecology, Fudan University, Shanghai, China
| | - Q Xue
- Department of Obstetrics and Gynaecology, Yulin First Hospital, Yanan Medical University, Shaanxi Province, China
| | - G Chen
- Department of Obstetrics and Gynaecology, Yulin First Hospital, Yanan Medical University, Shaanxi Province, China
| | - K Zeng
- Department of orthopaedics, Wuxi No. 2 People's Hospital, Nanjing Medical University, Nanjing, China
| | - P Stone
- Department of Obstetrics and Gynaecology, The University of Auckland, Auckland, New Zealand
| | - M Zhao
- Wuxi Maternity and Child Health Hospital Affiliated Nanjing Medical University, Wuxi, China
| | - Q Chen
- 1] The Hospital of Obstetrics and Gynaecology, Fudan University, Shanghai, China [2] Department of Obstetrics and Gynaecology, The University of Auckland, Auckland, New Zealand
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Abstract
Toll-like receptor 4 (TLR4)-tumor necrosis factor receptor 6 (TRAF6) signaling is activated in atherosclerosis (AS), inducing inflammatory mediators. Because miR-146a, a TLR4 microRNA (miRNA), can regulate TLR4 signaling during inflammatory responses, this study investigated the effects of aerobic exercise on TLR4-targeted miRNAs in AS. Apolipoprotein E-null mice fed a high-fat diet for 12 weeks were separated into 3 groups: (i) no treatment (AS), (ii) statin treatment (AD), or (iii) aerobic exercise (AE). Plaques and foam cells were observed in the untreated control and statin groups, respectively, but not in the AE group. Reduced angiotensin II (Ang II) and endothelin 1 (ET1) levels were observed in the AE group. Both treatment groups significantly altered the expression of inflammatory cytokine expression and reduced vascular TLR4 levels. Increased miR-146a and miR-126 and reduced miR-155 levels were observed in both treatment groups (all, P<0.001). miR-146a interacted with the 3' untranslated region of the TRAF6 gene, reducing its expression. Thus, aerobic exercise and statins may induce miR-146a expression, thereby reducing vascular TRAF and TLR4 signaling and vascular inflammatory injury in AS. Further analysis of this pathway may provide insight into the protective effects of aerobic exercise on vascular disease as well as new therapeutic targets.
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Affiliation(s)
- X-D Wu
- Anesthesiology, Fujian Provincial Clinical Medical College, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, China
| | - K Zeng
- Anesthesiology, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - W-L Liu
- Rehabilitation, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Y-G Gao
- Anesthesiology, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - C-S Gong
- Anesthesiology, Fujian Provincial Clinical Medical College, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, China
| | - C-X Zhang
- Physical Education, Institute of Human Movement Sciences Research, Hunan Normal University, Changsha, China
| | - Y-Q Chen
- Anesthesiology, Fujian Provincial Clinical Medical College, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, China
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Zhao M, Ding JX, Zeng K, Zhao J, Shen F, Yin YX, Chen Q. Heat shock protein 27: a potential biomarker of peritoneal metastasis in epithelial ovarian cancer? Tumour Biol 2013; 35:1051-6. [PMID: 24061637 DOI: 10.1007/s13277-013-1139-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 08/23/2013] [Indexed: 11/29/2022] Open
Abstract
Ovarian cancer is the major gynaecologic malignancy and the leading cause of death in gynaecological cancer. Heat shock proteins (HSPs) are highly expressed in many malignant cancers and involved in metastasis including ovarian cancer. The early detection of peritoneal metastases in epithelial ovarian cancer may be more important in clinical care. HSP27, a small heat shock protein, is correlated with peritoneal metastases in epithelial ovarian cancer tissues. In this study, we investigated whether the levels of total HSP27 were detectable in serum and whether it could be a predictive biomarker for peritoneal metastases in epithelial ovarian cancer. Serum samples from 48 patients with epithelial ovarian cancer, 35 patients with benign ovarian tumours and 24 healthy women were included in this study. The serum levels of total HSP27 were measured by enzyme-linked immunosorbent assay (ELISA). There was no difference in the serum levels of total HSP27 between women with benign ovarian tumours and healthy women. However, the serum levels of total HSP27 were significantly increased in patients with epithelial ovarian cancer. The increased serum levels of total HSP27 were only seen in patients with peritoneal metastases. Furthermore, increased serum levels of total HSP27 were significantly reduced after the combination chemotherapies in patients with peritoneal metastases. These data suggest that circulating HSP27 levels were increased in epithelial ovarian cancer and correlated with peritoneal metastases. The measurement of serum HSP27 levels may be used as a potential additional indicator for peritoneal metastases in epithelial ovarian cancer and response to treatment.
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Affiliation(s)
- M Zhao
- Wuxi Maternity and Child Health Hospital, Nanjing Medical University, Nanjing, China
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31
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FitzGerald P, Bennett J, Carr J, Edic P, Entrikin D, Gao H, Iatrou M, Jin Y, Liu B, Wang G, Wang J, Yin Z, Yu H, Zeng K, De Man B. SU-C-134-03: Selecting a Cardiac-Specific CT System Architecture. Med Phys 2013. [DOI: 10.1118/1.4813978] [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: 11/07/2022] Open
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32
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Gorham ED, Garland CF, Burgi AA, Mohr SB, Zeng K, Hofflich H, Kim JJ, Ricordi C. Lower prediagnostic serum 25-hydroxyvitamin D concentration is associated with higher risk of insulin-requiring diabetes: a nested case-control study. Diabetologia 2012; 55:3224-7. [PMID: 22955995 DOI: 10.1007/s00125-012-2709-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 08/08/2012] [Indexed: 10/27/2022]
Abstract
AIMS/HYPOTHESIS Low serum 25-hydroxyvitamin D [25(OH)D] concentration may increase risk of insulin-requiring diabetes. METHODS A nested case-control study was performed using serum collected during 2002-2008 from military service members. One thousand subjects subsequently developed insulin-requiring diabetes. A healthy control was individually matched to each case on blood-draw date (±2 days), age (±3 months), length of service (±30 days) and sex. The median elapsed time between serum collection and first diagnosis of diabetes was 1 year (range 1 month to 10 years). Statistical analysis used matched pairs and conditional logistic regression. RESULTS ORs for insulin-requiring diabetes by quintile of serum 25(OH)D, from lowest to highest, were 3.5 (95% CI 2.0, 6.0), 2.5 (1.5, 4.2), 0.8 (0.4, 1.4), 1.1 (0.6, 2.8) and 1.0 (reference) (p (trend) <0.001). The quintiles (based on fifths using serum 25(OH)D concentration in the controls) of serum 25(OH)D in nmol/l, were <43 (median 28), 43-59 (median 52), 60-77 (median 70), 78-99 (median 88) and ≥100 (median 128). CONCLUSIONS/INTERPRETATION Individuals with lower serum 25(OH)D concentrations had higher risk of insulin-requiring diabetes than those with higher concentrations. A 3.5-fold lower risk was associated with a serum 25(OH)D concentration ≥60 nmol/l.
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Affiliation(s)
- E D Gorham
- Naval Health Research Center, 140 Sylvester Road, San Diego, CA 92106-3521, USA.
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33
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Abstract
Summary Background Several studies have reported that HLA-DRB1 may be correlated with pemphigus vulgaris (PV), but most have been based on small samples and the results remain inconsistent and unclear. Objectives To investigate the correlation between DRB1 and PV by a meta-analysis of case–control/nonfamily studies. Methods PubMed, Wiley Online Library, ScienceDirect, Google Scholar, Cochrane Library, Chinese National Knowledge Infrastructure and Wanfang databases were searched for studies including: (i) ‘pemphigus’; and (ii) ‘human leukocyte antigen’, ‘HLA’, ‘major histocompatibility complex’, ‘MHC’ or ‘DRB1’. Eighteen selected studies were used in meta-analyses to evaluate DRB1 alleles and phenotypes by calculating the respective odds ratios (ORs) and 95% confidence intervals (CIs). Stratified meta-analyses and meta-regression analysis were also conducted. Results The frequencies of three genotypes (allele and phenotype, respectively) were significantly increased in PV: DRB1*04 [P-value for comparability (Pc) < 0·00001, OR 3·61, 95% CI 2·28–5·71; Pc = 0·0002, OR 4·14, 95% CI 1·98–8·65], DRB1*08 (Pc = 0·03, OR 2·25, 95% CI 1·07–4·70; Pc = 0·0003, OR 2·46, 95% CI 1·51–4·01) and DRB1*14 (Pc < 0·00001, OR 6·47, 95% CI 4·52–9·26; Pc < 0·00001, OR 9·68, 95% CI 4·47–20·98). Three others (allele and phenotype, respectively) were significantly decreased in PV: DRB1*03 (Pc < 0·00001, OR 0·28, 95% CI 0·19–0·41; Pc = 0·0001, OR 0·25, 95% CI 0·12–0·51), DRB1*07 (Pc = 0·004, OR 0·45, 95% CI 0·26–0·78; Pc = 0·0002, OR 0·27, 95% CI 0·14–0·54) and DRB1*15 (Pc = 0·001, OR 0·35, 95% CI 0·18–0·66; Pc = 0·002, OR 0·32, 95% CI 0·16–0·65). Ethnicity partially explained the heterogeneity of DRB1*07, DRB1*08 and DRB1*14 phenotypes. Conclusions Our findings suggest that DRB1*04, DRB1*08 and DRB1*14 are statistically significant susceptibility factors for PV. Conversely, DRB1*03, DRB1*07 and DRB1*15 may be negatively associated with PV. Specific HLA-DRB1 types may influence the susceptibility or resistance to PV, which needs further investigations.
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Affiliation(s)
- L Yan
- Department of Dermatology, Nanfang Hospital, Southern Medical University, Baiyun District, Guangzhou, Guangdong Province, 510515, China
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Zeng K, Wu XD, Liu QC, Gao F, Lin CZ. Impact of a novel mutation in the 5'-flanking region of natriuretic peptide precursor B gene on the antihypertensive effects of sodium nitroprusside in patients with hypertension. J Hum Hypertens 2012; 27:271-6. [PMID: 22695938 DOI: 10.1038/jhh.2012.25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Our aim was to identify the possible mutations of the natriuretic peptide precursor B (NPPB) gene in a family with hereditary hypertension, and determine whether the mutations are associated with the antihypertensive effect of sodium nitroprusside. The subjects included one family with hereditary hypertension, 36 cases of sporadic hypertension and 120 healthy controls. The 5'-flanking sequence of NPPB was amplified with PCR, and the presence of mutations was analyzed by direct sequencing. Patients with hypertension were treated with sodium nitroprusside and blood pressure data and serum B-type natriuretic peptide (BNP) levels were measured. A novel complex mutation in 5'-flanking sequence of the NPPB gene was detected in three patients (II 2, III 2, and III 5) of the hypertension family, which included c.-1195_ -1176 insert 5'-CCTTCTTTCTTTCTTTCTTT-3', c.-1208 T>A, c.-1214 T>C, and c.-1216 T>A. Patients with this mutation were less sensitive to sodium nitroprusside treatment. Sporadic hypertension patients (without NPPB gene mutation) and patients with the c.-1181 T>A point mutation were sensitive to sodium nitroprusside treatment. BNP levels of patients with the complex mutation were significantly lower than that of sporadic hypertension patients and c.-1181 T>A mutation patients before and during the early stage of sodium nitroprusside treatment. The complex mutation of the NPPB gene might be an etiological factor of hereditary malignant hypertension, and it is associated with low sensitivity to the antihypertensive effect of sodium nitroprusside.
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Affiliation(s)
- K Zeng
- Department of Anesthesiology, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
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35
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Gu Y, Liang Y, Gong J, Zeng K, Li Z, Lei Y, He Z, Lv X. Short Communication Suitable internal control microRNA genes for measuring miRNA abundance in pig milk during different lactation periods. Genet Mol Res 2012; 11:2506-12. [DOI: 10.4238/2012.june.18.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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36
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Zeng K. A Simple Multiallele Model and Its Application to Identifying Preferred-Unpreferred Codons Using Polymorphism Data. Mol Biol Evol 2010; 27:1327-37. [DOI: 10.1093/molbev/msq023] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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38
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Köbel M, Weidensdorfer D, Reinke C, Lederer M, Schmitt WD, Zeng K, Thomssen C, Hauptmann S, Hüttelmaier S. Expression of the RNA-binding protein IMP1 correlates with poor prognosis in ovarian carcinoma. Oncogene 2007; 26:7584-9. [PMID: 17546046 DOI: 10.1038/sj.onc.1210563] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The IMP (IGFII mRNA-binding protein) family comprises a group of three RNA-binding proteins involved in the regulation of cytoplasmic mRNA-fate. Recent studies identified IMP proteins as oncofetal factors in various neoplasias, but knowledge of a potential role in ovarian carcinomas is still lacking. The immunohistochemical analysis of 107 ovarian carcinomas, 30 serous borderline tumors of the ovary and five normal ovaries revealed de novo synthesis of IMP1 in 69% of ovarian carcinomas. Elevated IMP1 expression was observed preferentially in high-grade and high-stage cases and was a significant prognostic indicator for reduced recurrence-free and overall survival. Phenotypic studies in ovarian carcinoma-derived ES-2 cells demonstrated that IMP1 knockdown affects proliferation and cell survival. Reduced proliferation was associated with decreased c-myc mRNA half-life, suggesting IMP1 as an oncogenic factor that is involved in promoting elevated proliferation by stabilizing the c-myc mRNA in ovarian carcinoma cells.
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Affiliation(s)
- M Köbel
- Department of Medicine, Institute of Pathology, Martin-Luther-University Halle-Wittenberg, Halle, Germany
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39
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Abstract
The effect of riboflavin (1 microM) on the fate of TNT (20 mg/l) in a natural water environment was studied. The relative contribution of photolysis, microbial assemblages and freshwater matrix to TNT degradation was examined. The rates, extent and products of TNT and riboflavin transformation were compared under different experimental conditions. It was found that riboflavin significantly enhanced the degradation of TNT in natural water environment. Thus it is a potentially useful photosensitizing agent for the treatment of TNT-contaminated surface water. Furthermore, in the presence of riboflavin, two new intermediates with max. absorption wavelength of 230 nm were found, demonstrating that transformation of TNT in the presence of riboflavin undergoes different pathways.
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Affiliation(s)
- H Cui
- Department of Biology, Jackson State University, MS 39217, USA
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40
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Abstract
An efficient bioartificial liver-assisted device can sustain the lives of patients with acute liver failure. Among different configurations of the bioreactor design, hepatocyte encapsulation has important features that satisfy most requirements of the device. We have encapsulated rat hepatocytes in a two-layer polymeric membrane by complex coacervation using a simple setup and demonstrated enhanced cellular functions up to three times higher than those of the monolayer control. These microcapsules of the functioning hepatocytes have a 2- to 3-microm outer layer of synthetic polymer with 25% 2-hydroxyethyl methacrylate, 25% methacrylic acid, and 50% methyl methacrylate and an inner layer of positively charged modified collagen as a suitable substrate for the enhanced cellular functions. Permeable only to small molecules up to albumin, the microcapsules should allow unimpeded exchange of nutrients, oxygen, growth factors, and metabolites but prevent attack by immunoglobulins of the immune system, and no "skin effect" of the collagen has been observed. Mechanical properties of the microcapsules measured with a nano-indentation method suggest that the microcapsules should be suitable for use in a bioartificial liver-assisted device.
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Affiliation(s)
- S M Chia
- National University Medical Institutes, National University of Singapore, Singapore
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41
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Bso W, Wang J, Zhou Z, Xu K, Zeng K, Yu Z. Through the fibroncoscopy to diagnosis of lung cancer with the intrinsic fluorescence. Lung Cancer 2000. [DOI: 10.1016/s0169-5002(00)80918-6] [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: 10/27/2022]
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42
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Abstract
Methylamine dehydrogenase (MADH) has been immobilized in a polpyrrole (PPy) film on an electrode surface and used as an amine sensor for the determination of primary amines. Its response to histamine has been characterized in detail. The PPy film containing MADH was formed electrochemically on a gold minielectrode (1-mm diameter) in the presence of ferricyanide. The film was then coated with Nafion. This enzyme electrode did not require any additional cofactors and was not sensitive to oxygen. It exhibited a maximum response current to histamine at applied potentials of 0.24-0.33 V and at pH 7.5-8.5. This MADH-PPy sensor exhibited a response time of less than 3 s. The immobilized MADH on the electrode exhibited Michaelis-Menten behavior similar to that of the free enzyme in solution with a Km value of 1.3 mM. This sensor could be used to reliably detect histamine over a concentration range from approximately 25 microM to 4 mM. This is the first example of a biosensor that uses an immobilized enzyme that possesses the tryptophan tryptophylquinone prosthetic group.
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Affiliation(s)
- K Zeng
- Department of Chemistry, Jackson State University, Mississippi 39217, USA
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Luan P, Heine A, Zeng K, Moyer B, Greasely SE, Kuhn P, Balch WE, Wilson IA. A new functional domain of guanine nucleotide dissociation inhibitor (alpha-GDI) involved in Rab recycling. Traffic 2000; 1:270-81. [PMID: 11208110 DOI: 10.1034/j.1600-0854.2000.010309.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Guanine nucleotide dissociation inhibitor (GDI) is a 55-kDa protein that functions in vesicular membrane transport to recycle Rab GTPases. We have now determined the crystal structure of bovine alpha-GDI at ultra-high resolution (1.04 A). Refinement at this resolution highlighted a region with high mobility of its main-chain residues. This corresponded to a surface loop in the primarily alpha-helical domain II at the base of alpha-GDI containing the previously uncharacterized sequence-conserved region (SCR) 3A. Site-directed mutagenesis showed that this mobile loop plays a crucial role in binding of GDI to membranes and extraction of membrane-bound Rab. This domain, referred to as the mobile effector loop, in combination with Rab-binding residues found in the multi-sheet domain I at the apex of alpha-GDI may provide flexibility for recycling of diverse Rab GTPases. We propose that conserved residues in domains I and II synergize to form the functional face of GDI, and that domain II mediates a critical step in Rab recycling during vesicle fusion.
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Affiliation(s)
- P Luan
- Department of Molecular Biology, Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037, USA
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Ye Q, Wu K, Xie L, Zeng K, Lin J, Lin C. [The relationship of polymorphism of angiotensinogen and angiotensin converting enzyme with essential hypertension]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2000; 17:28-31. [PMID: 10653905] [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: 02/15/2023]
Abstract
OBJECTIVE In order to investigate the candidate genes for essential hypertension(EH), the authors determined the frequencies of M235T allele variation in exon 2 of angiotensinogen(AGT) gene and angiotensin converting enzyme (ACE) gene in 95 normotensives and 87 hypertensives in Chinese. METHODS Polymerase chain reaction combined with restriction enzyme digestion was used to detect the variation AGT gene while PCR was used to determine ACE gene polymorphism. RESULTS T235 allele frequency was significantly higher in hypertensive patients than in controls (0.45 vs 0.33, P<0. 05) and it was noticeably higher in male hypertensives. The frequency of ACE D allele in the EH patients with family history was higher than that in controls(0.59 vs 0.41,P<0.05). CONCLUSION The variation of AGT gene was involved in the pathogenesis of hypertension, especially in male. The ACE D allele was associated with EH with family history.
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Affiliation(s)
- Q Ye
- Institute of Hypertension Research, The First Affiliated Hospital of Fujian Medical University,Fuzhou, Fujian, 350005 P.R. China.
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45
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Moshaashaee M, Zeng K. Determination of heat generation in double layer shields. ANN NUCL ENERGY 1999. [DOI: 10.1016/s0306-4549(99)00011-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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46
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Wu SK, Luan P, Matteson J, Zeng K, Nishimura N, Balch WE. Molecular role for the Rab binding platform of guanine nucleotide dissociation inhibitor in endoplasmic reticulum to Golgi transport. J Biol Chem 1998; 273:26931-8. [PMID: 9756941 DOI: 10.1074/jbc.273.41.26931] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [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: 11/06/2022] Open
Abstract
Guanine nucleotide dissociation inhibitor (GDI) regulates the recycling of Rab GTPases involved in vesicle targeting and fusion. We have analyzed the requirement for conserved amino acid residues in the binding of Rab1A and the function of GDI in transport of cargo between the endoplasmic reticulum (ER) and the Golgi apparatus. Using a new approach to monitor GDI-Rab interactions based on the change in fluorescence associated with the release of methylanthraniloyl guanosine di(tri)phosphate-GDP (mGDP) from Rab, we show that residues previously implicated in the binding of the synapse-specific Rab3A, including Gln-236, Arg-240, and Thr-248, are essential for the binding of Rab1A. Mutation of each of these residues has potent effects on the ability of GDI to remove Rab1A from membranes and inhibit ER to Golgi transport in vitro. Given the sequence divergence between Rab1A and 3A (35% identity), these residues are proposed to play a general role in GDI function in the cell. In contrast, several other residues found within or flanking the Rab-binding region were found to have differential effects in the recognition and recycling of Rab1A and 3A, and therefore direct selective interaction of GDI with individual Rab proteins. Intriguingly, mutation of one residue, Arg-70, led to a reduction of Rab1A binding, failed to extract Rab1A from membranes in vitro, yet bound membranes tightly and potently inhibited ER to Golgi transport. These results provide evidence that novel membrane-associated factor(s) mediate Rab-independent GDI interaction with membranes.
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Affiliation(s)
- S K Wu
- Departments of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, California 92037, USA
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Zeng K, Odén A, Rowcliffe D. Evaluation of mechanical properties of dental ceramic core materials in combination with porcelains. INT J PROSTHODONT 1998; 11:183-9. [PMID: 9709610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE This paper describes the mechanical testing of dental ceramic core materials in combination with porcelains to simulate the real service conditions for dental applications. MATERIALS AND METHODS The study included Procera AllCeram (densely sintered high-purity alumina); Vita In-Ceram (glass-infiltrated presintered alumina); three dental porcelains (Procera Porcelain AllCeram, Vitadur-N, and Vitadur Alpha); and densely sintered alumina-Procera Porcelain AllCeram two-layer composites, densely sintered alumina-Vitadur-N two-layer composites, and glass-infiltrated presintered alumina-Vitadur Alpha two-layer composites, with different thicknesses of densely sintered alumina or glass-infiltrated presintered alumina, respectively. The flexural tests were performed in ring-on-ring biaxial bending. The flexural failure stresses were determined using both Timoshenko's biaxial loading equation and Shetty's ring-on-ring stress equation. The bending theory of bilayer plates was used to evaluate the failure stresses in the two-layer composites. Weibull statistics were applied to all stress data, and the information was used to estimate the failure probability at selected applied stresses for a comparison of different two-layer densely sintered alumina-porcelain composites. RESULTS The failure stress of densely sintered alumina is significantly higher than that of glass-infiltrated presintered alumina as a core dental material under the same testing conditions. The failure stresses of the three commercial dental porcelains are statistically the same. CONCLUSION The results show that the densely sintered alumina-Procera Porcelain AllCeram two-layer composite has interesting dental applications.
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Affiliation(s)
- K Zeng
- Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden.
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48
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Abstract
The 1.81 A crystal structure of Rab GDP-dissociation inhibitor (GDI), a protein that plays a critical role in the recycling of Rab GTPases involved in membrane vesicular transport, has been recently determined. Biochemical studies implicate a highly conserved region involved in Rab binding, which is common to both GDI and the evolutionarily-related choroideremia gene product (CHM/REP) required for Rab prenylation. Here, we summarize the mechanisms by which members of the GDI superfamily might function to coordinate events leading to membrane fusion, and we discuss the unexpected, yet striking structural homology of GDI to FAD-binding proteins.
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Affiliation(s)
- S K Wu
- Department of Cell Biology, Scripps Research Institute, La Jolla, CA 92037, USA
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49
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Zeng K, Odén A, Rowcliffe D. Flexure tests on dental ceramics. INT J PROSTHODONT 1996; 9:434-9. [PMID: 9108743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The failure stresses in flexural tests of a densely sintered high-purity alumina (Procera AllCeram) were evaluated using three-point bend, ring-on-ring, and piston-on-three-ball tests. Glass-infiltrated presintered alumina (In-Ceram) and leucite-reinforced porcelain (IPS Empress) disks with the same dimensions were also tested using ring-on-ring and piston-on-three-ball tests. The failure stresses for all materials were substantially different (up to 50%) with different testing methods, and cannot be directly compared. However, by considering the effective specimen area under the maximum tensile stress, these failure stress data could be compared. The results emphasize the importance of knowing the test method and the method of calculation when comparing data. These three testing methods were also subjected to Weibull analysis. The Procera AllCeram had a consistently higher failure stress than the other two materials.
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Affiliation(s)
- K Zeng
- Department of Mateials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden
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50
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Zeng K, Schalk I, Wu SK, Stura EA, Madison J, Huang M, Anurag T, Balch WE, Wilson IA. Crystal structure of the guanine nucleotide dissociation inhibitor (GDI) determined at 1.81 Å resolution. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396092343] [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: 04/03/2023] Open
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