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Wang H, Chang J, Zhang W, Fang Y, Li S, Fan Y, Jiang S, Yao Y, Deng K, Lu L, Bao X, Feng F, Wang R, Feng M. Radiomics model and clinical scale for the preoperative diagnosis of silent corticotroph adenomas. J Endocrinol Invest 2023:10.1007/s40618-023-02042-2. [PMID: 37020103 DOI: 10.1007/s40618-023-02042-2] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 02/12/2023] [Indexed: 04/07/2023]
Abstract
OBJECTIVE Silent corticotroph adenomas (SCAs) are a subtype of nonfunctioning pituitary adenomas that exhibit more aggressive behavior. However, rapid and accurate preoperative diagnostic methods are currently lacking. DESIGN The purpose of this study was to examine the differences between SCA and non-SCA features and to establish radiomics models and a clinical scale for rapid and accurate prediction. METHODS A total of 260 patients (72 SCAs vs. 188 NSCAs) with nonfunctioning adenomas from Peking Union Medical College Hospital were enrolled in the study as the internal dataset. Thirty-five patients (6 SCAs vs. 29 NSCAs) from Fuzhou General Hospital were enrolled as the external dataset. Radiomics models and an SCA scale to preoperatively diagnose SCAs were established based on MR images and clinical features. RESULTS There were more female patients (internal dataset: p < 0.001; external dataset: p = 0.028) and more multiple microcystic changes (internal dataset: p < 0.001; external dataset: p = 0.012) in the SCA group. MRI showed more invasiveness (higher Knosp grades, p ≤ 0.001). The radiomics model achieved AUCs of 0.931 and 0.937 in the internal and external datasets, respectively. The clinical scale achieved an AUC of 0.877 and a sensitivity of 0.952 in the internal dataset and an AUC of 0.899 and a sensitivity of 1.0 in the external dataset. CONCLUSIONS Based on clinical information and imaging characteristics, the constructed radiomics model achieved high preoperative diagnostic ability. The SCA scale achieved the purpose of rapidity and practicality while ensuring sensitivity, which is conducive to simplifying clinical work.
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Affiliation(s)
- H Wang
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Neurospine center, China International Neuroscience Institute, Beijing, China
| | - J Chang
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
| | - W Zhang
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
- Department of Thoracic Surgery, Peking University First Hospital, Beijing, China
| | - Y Fang
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
| | - S Li
- Department of Plastic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College Hospital, Beijing, China
| | - Y Fan
- Department of Neurosurgery, Beijing Tiantan Hospital, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - S Jiang
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
| | - Y Yao
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
| | - K Deng
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
| | - L Lu
- Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College Hospital, Beijing, China
| | - X Bao
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China
| | - F Feng
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College Hospital, Beijing, China
| | - R Wang
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China.
| | - M Feng
- Department of Neurosurgery, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, No. 1 Shuai Fu Yuan, Dongcheng District, Beijing, 100730, China.
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Luo X, Jiang H, Liu XJ, Zhang Z, Deng K, Lin F, Jiang J, Wang YL, Yu J. Base MRI Imaging Characteristics of Meningioma Patients to Discuss the WHO Classification of Brain Invasion Otherwise Benign Meningiomas. Technol Cancer Res Treat 2023; 22:15330338231171470. [PMID: 37264676 DOI: 10.1177/15330338231171470] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
PURPOSE Compared and analyzed the MRI imaging features of brain invasion otherwise benign (BIOB) meningiomas and WHO grade 1, grade 2 meningiomas, discussed the WHO grading of BIOB from the perspective of imaging. MATERIALS AND METHODS A retrospective analysis was performed on 675 meningiomas patients who carried on MRI examination from January 2006 to February 2022. Setting the 2022 Central nervous system (CNS) WHO Guidelines as the gold standard for pathological diagnosis. Statistical analysis of age, gender, and MRI features of meningiomas in relation to WHO grade and brain invasion. RESULTS Among 675 cases meningiomas, 543 (80.4%) were WHO grade 1, 123 (18.2%) were WHO grade 2, and 9 (1.3%) were WHO grade 3. There were 108 cases meningiomas with brain invasion (BI) (16.0%) and 567 cases without BI (84.0%). Among BI cases, 67 cases were BIOB. Compared the MRI features between BIOB and WHO grade 1 meningiomas, multivariate analysis demonstrated that the most strongly factors associated with distinguish them were enhancement degree, peritumoral edema, tumor-brain interface, fingerlike protrusion, mushroom sign, and bone invasion (AUC: 0.925 (0.901∼0.945), sensitivity: 0.925, specificity: 0.801). Compared the MRI features between BIOB and WHO grade 2 meningiomas, multivariate analysis demonstrated that the most strongly factors associated with distinguish them were enhancement degree and the tumor-brain interface (AUC: 0.779 (0.686∼0.841), sensitivity: 0.746, specificity: 0.732), their efficacy was slightly weaker. CONCLUSIONS BIOB is more similar to WHO grade 2 meningiomas in clinical and imaging features than WHO grade 1, so we think that it may be reasonable to classify BIOB as WHO Grade 2 meningiomas in the guidelines.
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Affiliation(s)
- Xiao Luo
- Department of Radiology, The First Affiliated Hospital of Shenzhen University, Health Science Center, Shenzhen Second People's Hospital, Shenzhen, China
| | - Hong Jiang
- Faculty of Medicine, Macau university of science and technology, Macau University of Science and Technology, Taipa, Macau, China
| | - X J Liu
- Department of Radiology, The First Affiliated Hospital of Shenzhen University, Health Science Center, Shenzhen Second People's Hospital, Shenzhen, China
| | - Z Zhang
- Faculty of Medicine, Macau university of science and technology, Macau University of Science and Technology, Taipa, Macau, China
| | - K Deng
- Philips Healthcare, China International Center, Guangzhou, China
| | - F Lin
- Department of Radiology, The First Affiliated Hospital of Shenzhen University, Health Science Center, Shenzhen Second People's Hospital, Shenzhen, China
| | - J Jiang
- Department of Radiology, The First Affiliated Hospital of Shenzhen University, Health Science Center, Shenzhen Second People's Hospital, Shenzhen, China
| | - Y L Wang
- Department of Radiology, The First Affiliated Hospital of Shenzhen University, Health Science Center, Shenzhen Second People's Hospital, Shenzhen, China
| | - J Yu
- Department of Radiology, The First Affiliated Hospital of Shenzhen University, Health Science Center, Shenzhen Second People's Hospital, Shenzhen, China
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Ke X, Duan L, Gong F, Zhang Y, Deng K, Yao Y, Wang L, Feng F, Xing B, Pan H, Zhu H. A study on serum pro-neurotensin (PNT), furin, and zinc alpha-2-glycoprotein (ZAG) levels in patients with acromegaly. J Endocrinol Invest 2022; 45:1945-1954. [PMID: 35670958 DOI: 10.1007/s40618-022-01827-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/18/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE Acromegaly caused by growth hormone cell adenoma is commonly associated with abnormal glucolipid metabolism, which may result from changes in adipocytokine secretion. This study aims to investigate serum adipokine levels, including pro-neurotensin (PNT), furin, and zinc alpha-2-glycoprotein (ZAG), in acromegalic patients and the correlation between the levels of these three adipokines and GH levels and glucolipid metabolism indices. METHODS Sixty-eight acromegalic patients and 121 controls were included, and their clinical data were recorded from electronic medical record system. Serum PNT, furin and ZAG levels were measured by ELISA. RESULTS Serum PNT levels in acromegalic patients were significantly higher than controls (66.60 ± 12.36 vs. 46.68 ± 20.54 pg/ml, P < 0.001), and acromegaly was an independent influencing factor of PNT levels (P < 0.001). Moreover, subjects with the highest tertile of PNT levels had a close correlation with acromegaly (OR = 22.200, 95% CI 7.156 ~ 68.875, P < 0.001), even in Model 1 adjusted for gender and age and Model 2 adjusted for gender, age and BMI. Additionally, serum PNT levels were positively correlated with BMI (r = 0.220, P = 0.002) and triglycerides (TGs, r = 0.295, P < 0.001), and TGs were an independent influencing factor of serum PNT levels in acromegalic subjects (P < 0.001). Furthermore, serum PNT levels in obese acromegalic patients were significantly higher than those with normal BMI (P < 0.05). However, serum furin levels were lower in acromegalic patients than controls (0.184 ± 0.036 vs. 0.204 ± 0.061 ng/ml, P < 0.001). CONCLUSION This study is the first to demonstrate that acromegalic patients have increased serum PNT levels. Moreover, serum PNT plays a potential role in abnormal lipid metabolism of acromegalic patients.
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Affiliation(s)
- X Ke
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - L Duan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - F Gong
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - Y Zhang
- Central Research Laboratory, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - K Deng
- Department of Neurosurgery, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - Y Yao
- Department of Neurosurgery, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - L Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - F Feng
- Department of Radiology, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - B Xing
- Department of Neurosurgery, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - H Pan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - H Zhu
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China.
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Huang J, Ding Y, Yao J, Peng K, Deng K, Zhang M, Zhang Y, Zuo J. The SARS-CoV-2 rS1-E-PLGA nanovaccine and evaluation of its immune effect in BALB/c mice. Eur Rev Med Pharmacol Sci 2022; 26:5255-5263. [PMID: 35916825 DOI: 10.26355/eurrev_202207_29316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE Vaccination is an important method for preventing COVID-19 infection. However, certain vaccines do not meet the current needs. To improve the vaccine effect, discard ineffective antigens, and focus on high-quality antigenic clusters, S1-E bivalent antigens were designed. MATERIALS AND METHODS Vaccine delivery is performed using poly (lactic-co-glycolic acid) (PLGA). Here, the recombinant S1-E (rS1-E) was covered on PLGA and injected intramuscularly into mice. In total, 48 BALB/c mice were randomly divided into six groups with 8 mice in each group. The mice received intramuscular injections. Prior to vaccination, the hydrophobicity of the rS1-E and the antigenic site of the E protein were both analysed. The morphology, zeta potential, and particle size distribution of rS1-E-PLGA were examined. Anti-S1 and anti-E antibodies were detected in mouse serum by ELISA. Neutralising an-tibodies were detected by co-incubating the pseudovirus with the obtained serum. IL-2 and TNF-α levels were also measured. RESULTS The designed recombinant S1-E protein was successfully coated on PLGA nanoparticles. rS1-E-PLGA nanovaccine has suitable size, shape, good stability, sustained release and other characteristics. Importantly, mice were stimulated with rS1-E-PLGA nanovaccines to produce high-titre antibodies and a good cellular immune response. CONCLUSIONS Our results indicate that rS1-E-PLGA nanovaccine may provide a good protective effect, and the vaccine should be further investigated in human clinical trials for use in vaccination or as a booster.
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Affiliation(s)
- J Huang
- The Laboratory of Translational Medicine, Nanhua Hospital Affiliated to University of South China, The Third Affiliated Hospital of University of South China, Institute of Pathogenic Biology, Hengyang Medical School, University of South China, Hengyang, Hunan, P.R. China.
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Wang JJ, Chi XT, Wang WW, Deng K. Analysis of contrast-enhanced spectral chest CT optimal monochromatic imaging combined with ASIR and ASIR-V. Eur Rev Med Pharmacol Sci 2022; 26:1930-1938. [PMID: 35363342 DOI: 10.26355/eurrev_202203_28339] [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: 06/14/2023]
Abstract
OBJECTIVE The aim of the study was to explore the application of spectral chest CT optimal monochromatic imaging combined with ASIR and ASIR-V to optimize the image quality in the arterial phase. PATIENTS AND METHODS 62 patients who had undergone contrast-enhanced chest CT examination using spectral CT were included. Twelve sets of arterial phase images were acquired using GSI mode. The CNR, BHA values and subjective scores were statistically analysed. Thus, optimal monochromatic images were obtained. Then, the images were acquired by reconstruction using ASIR and ASIR-V at 30%, 50% and 70% levels. Six sets of images were obtained and compared with QC and the monochromatic image under FBP mode. RESULTS In FBP mode, the CNR of 80-keV images was 7.7±2.0, showing no significant difference with QC images (p > 0.05). The BHA value in the blood vessels was 45.2±23.1, which was lower than that in QC images (p < 0.05). The subjective image quality score of 80-keV images was 4.50±0.62. No significant difference was found in QC images (p > 0.05). The subjective score of the artefacts was 2.45±0.62, which was lower than that of QC images (p < 0.05). Thus, 80 keV was chosen as the optimal monochromatic energy to be reconstructed with ASIR and ASIR-V. The CNR of the 80keV+50% ASIR-V group was 13.9±4.3, which was higher than those of 140-kVp and 80-keV images in FBP (p < 0.05). The subjective score was 4.90±0.298, which was higher than that of other groups (p < 0.05). CONCLUSIONS Compared with conventional chest CT images in the arterial phase, 80keV+50% ASIR-V images can effectively eliminate beam-hardening artefacts and improve image quality.
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Affiliation(s)
- J-J Wang
- Department of Ultrasound, Jinan Maternity and Child Care Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, P.R. China.
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Zhao YL, Deng K, Shi JC. fs laser-induced filament study of aliphatic nitroalkanes: correlation between molecular structure and spectroscopic evolution of the filament. Analyst 2022; 147:889-896. [DOI: 10.1039/d1an02002a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
fs laser-induced filament and breakdown spectroscopy can be used for studying the correlation between the molecular structure and spectroscopic evolution of the filament.
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Affiliation(s)
- Y. L. Zhao
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan, People's Republic of China
| | - K. Deng
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, People's Republic of China
| | - J. C. Shi
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan, People's Republic of China
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Deng K, Kovalev A, Rajabi H, Schaber CF, Dai ZD, Gorb SN. The damping properties of the foam-filled shaft of primary feathers of the pigeon Columba livia. Naturwissenschaften 2021; 109:1. [PMID: 34860292 PMCID: PMC8642350 DOI: 10.1007/s00114-021-01773-7] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/17/2021] [Accepted: 11/22/2021] [Indexed: 11/26/2022]
Abstract
The avian feather combines mechanical properties of robustness and flexibility while maintaining a low weight. Under periodic and random dynamic loading, the feathers sustain bending forces and vibrations during flight. Excessive vibrations can increase noise, energy consumption, and negatively impact flight stability. However, damping can alter the system response, and result in increased stability and reduced noise. Although the structure of feathers has already been studied, little is known about their damping properties. In particular, the link between the structure of shafts and their damping is unknown. This study aims at understanding the structure-damping relationship of the shafts. For this purpose, laser Doppler vibrometry (LDV) was used to measure the damping properties of the feather shaft in three segments selected from the base, middle, and tip. A combination of scanning electron microscopy (SEM) and micro-computed tomography (µCT) was used to investigate the gradient microstructure of the shaft. The results showed the presence of two fundamental vibration modes, when mechanically excited in the horizontal and vertical directions. It was also found that the base and middle parts of the shaft have higher damping ratios than the tip, which could be attributed to their larger foam cells, higher foam/cortex ratio, and higher percentage of foam. This study provides the first indication of graded damping properties in feathers.
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Affiliation(s)
- K Deng
- Functional Morphology and Biomechanics, Institute of Zoology, Kiel University, Kiel, Germany.
| | - A Kovalev
- Functional Morphology and Biomechanics, Institute of Zoology, Kiel University, Kiel, Germany
| | - H Rajabi
- School of Engineering, London South Bank University, London, England
| | - C F Schaber
- Functional Morphology and Biomechanics, Institute of Zoology, Kiel University, Kiel, Germany
| | - Z D Dai
- Institute of Bioinspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - S N Gorb
- Functional Morphology and Biomechanics, Institute of Zoology, Kiel University, Kiel, Germany
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Liu J, Deng K, Pan M, Liu G, Wu J, Yang M, Huang D, Zhang W, Mai K. Dietary carbohydrates influence muscle texture of olive flounder Paralichthys olivaceus through impacting mitochondria function and metabolism of glycogen and protein. Sci Rep 2020; 10:21811. [PMID: 33311521 PMCID: PMC7732841 DOI: 10.1038/s41598-020-76255-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Accepted: 10/14/2020] [Indexed: 12/13/2022] Open
Abstract
The present study was conducted to estimate the effects of dietary carbohydrates on muscle quality and the underlying mechanisms. Six isonitrogenous and isolipidic diets were formulated to contain graded levels of carbohydrates (0%, 8%, 12%, 16%, 20% and 24%, respectively). These diets were named as C0, C8, C12, C16, C20 and C24, respectively. After a 10-week feeding trial, results showed that the muscle pH, liquid holding capacity (LHC) and hardness were significantly decreased by the increasing dietary carbohydrate levels. Dietary carbohydrates significantly decreased the muscle fibre diameter, and the highest value was found in the C0 group. Accumulated glycogen and degenerated mitochondrial cristae were observed in the C24 group. Significantly higher contents of protein carbonyls were observed in the C20 group and C24 group (P < 0.05). There was a significant decrease of mtDNA copy number in the C24 group compared with that in the C0 and C8 groups. The AMP/ATP ratio in muscle decreased first and then increased with the increasing dietary carbohydrate levels. The dietary incorporation of carbohydrate significantly reduced the expression of opa1, pygm and genes involved in myogenesis (myf5 and myog). Meanwhile, proteolysis-related genes (murf-1, mafbx, capn2 and ctsl), pro-inflammatory cytokines (il-6 and tnf-α) and mstn were significantly up-regulated. In the C24 group, significant increase of phosphorylation of AMPK (Thr172), up-regulation of PGC-1α and GLUT4 were observed, while the phosphorylation level of S6 (Ser235/236) was significantly decreased. It was concluded that excessive dietary carbohydrate level (24%) had negative impacts on mitochondria function and promoted glycogen accumulation, and thereafter influenced the muscle quality of olive flounder. The activation of AMPK as well as the upregulation of PGC-1α and GLUT4 was the key mechanism.
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Affiliation(s)
- Jiahuan Liu
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
| | - Kangyu Deng
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
- Shenzhen Alpha Group Co., Ltd., Shenzhen, China
| | - Mingzhu Pan
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
| | - Guangxia Liu
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
| | - Jing Wu
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
| | - Mengxi Yang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
| | - Dong Huang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
| | - Wenbing Zhang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China.
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao, 266237, China.
| | - Kangsen Mai
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, 266003, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao, 266237, China
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Wang Y, Li L, Deng K, Liu J, Liu Y, Zou K, Hao G, Sun X. PBI1 Comparison of the Combination of Recombinant Follicle-Stimulating Hormone and Recombinant Luteinizing Hormone Protocol Versus Human Menopausal Gonadotropin Protocol in Controlled Ovarian Stimulation: A Systematic Review and Meta-Analysis. Value Health Reg Issues 2020. [DOI: 10.1016/j.vhri.2020.07.009] [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: 10/23/2022]
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Yuan WH, Liu HL, Wei WZ, Ma ZY, Hao P, Deng Z, Deng K, Zhang J, Lu ZH. In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence. J Vis Exp 2020. [PMID: 32597872 DOI: 10.3791/61175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Accurate control of the polarization states of laser light is important in precision measurement experiments. In experiments involving the use of a vacuum environment, the stress-induced birefringence effect of the vacuum windows will affect the polarization states of laser light inside the vacuum system, and it is very difficult to measure and optimize the polarization states of the laser light in situ. The purpose of this protocol is to demonstrate how to optimize the polarization states of the laser light based on the fluorescence of ions in the vacuum system, and how to calculate the birefringence of vacuum windows based on azimuthal angles of external wave plates with Mueller matrix. The fluorescence of 25Mg+ ions induced by laser light that is resonant with the transition of |32P3/2,F = 4, mF = 4 → |32S1/2,F = 3, mF = 3 is sensitive to the polarization state of the laser light, and maximum fluorescence will be observed with pure circularly polarized light. A combination of half-wave plate (HWP) and quarter-wave plate (QWP) can achieve arbitrary phase retardation and is used for compensating the birefringence of the vacuum window. In this experiment, the polarization state of the laser light is optimized based on the fluorescence of 25Mg+ ion with a pair of HWP and QWP outside the vacuum chamber. By adjusting the azimuthal angles of the HWP and QWP to obtain maximum ion fluorescence, one can obtain a pure circularly polarized light inside the vacuum chamber. With the information on the azimuthal angles of the external HWP and QWP, the birefringence of the vacuum window can be determined.
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Affiliation(s)
- W H Yuan
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
| | - H L Liu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology;
| | - W Z Wei
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
| | - Z Y Ma
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
| | - P Hao
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
| | - Z Deng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
| | - K Deng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
| | - J Zhang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
| | - Z H Lu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology;
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11
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Deng K, Ren C, Fan Y, Liu Z, Zhang G, Zhang Y, You P, Wang F. miR-27a is an important adipogenesis regulator associated with differential lipid accumulation between intramuscular and subcutaneous adipose tissues of sheep. Domest Anim Endocrinol 2020; 71:106393. [PMID: 31731253 DOI: 10.1016/j.domaniend.2019.106393] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 08/05/2019] [Accepted: 09/04/2019] [Indexed: 01/15/2023]
Abstract
Micro ribonucleic acids (miRNAs) are crucial regulators for various biological processes. Despite important function in the proliferation and differentiation of preadipocytes, miRNA studies are limited in regional differences in adipogenesis. Here, we show that miR-27a plays an important role in regulating differential lipid accumulation between intramuscular (IM) and subcutaneous (SC) adipose tissues in sheep. Invivo, we observed that miR-27a expression in IM adipose tissue is more abundant than in SC adipose tissue. However, the expression of Peroxisome Proliferator-Activated Receptor Gamma (PPARG) and retinoid X receptor alpha (RXR alpha) in IM adipose tissue was significantly lower than that in SC adipose tissue. In the ovine preadipocyte differentiation model, we found that the expression of miR-27a was significantly decreased in differentiated ovine adipocytes. Overexpression of miR-27a significantly downregulated the expression of PPARG and RXR alpha and suppressed the accumulation of triglyceride but promoted the proliferation of ovine preadipocytes. Whereas, inhibition of miR-27a suppressed preadipocyte proliferation but enhanced PPARG and RXR alpha expression and lipid droplet formation. In addition, dual-luciferase activity assays showed that RXR alpha was a direct target of miR-27a. Thus, miR-27a enhances ovine preadipocytes proliferation and inhibits ovine preadipocytes differentiation through regulating the expression of target RXR alpha. Collectively, our study demonstrates the functional importance of miR-27a in ovine adipogenesis and provides novel insights into exploring regional differences in adipogenesis.
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Affiliation(s)
- K Deng
- Institute of Sheep and Goat Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - C Ren
- Institute of Sheep and Goat Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Y Fan
- Institute of Sheep and Goat Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Z Liu
- Institute of Sheep and Goat Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - G Zhang
- Institute of Sheep and Goat Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Y Zhang
- Institute of Sheep and Goat Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - P You
- Portal Agri-Industries Co, Ltd, Xingdian Street, Pikou District, Nanjing, Jiangsu, China
| | - F Wang
- Institute of Sheep and Goat Science, Nanjing Agricultural University, Nanjing, Jiangsu, China; National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing, Jiangsu, China.
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12
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Yuan WH, Liu HL, Wei WZ, Ma ZY, Hao P, Deng Z, Deng K, Zhang J, Lu ZH. A simple method for in situ measurement of vacuum window birefringence. Rev Sci Instrum 2019; 90:113001. [PMID: 31779433 DOI: 10.1063/1.5121568] [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] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
We present a simple method to measure the degrees of circular polarization (DoCP) of laser light inside a vacuum chamber and the birefringence of a vacuum window by detecting the fluorescence emitted by Doppler cooled ions in an ion trap. Imperfect laser polarization will cause ions to be pumped to the dark state which will decrease the fluorescence rates of the ions. With a simulation based on the rate equations of the relevant energy levels of 25Mg+ ions, we find that the fluorescence rate is sensitive to the DoCP of the laser. Based on the simulation result, we present a new method to optimize the DoCP of the laser inside the vacuum chamber by adjusting fast axis azimuthal angles of a half-wave plate and a quarter-wave plate outside the vacuum chamber. The laser light is optimized to be circularly polarized with an uncertainty of the DoCP of 7.8 × 10-5. With the obtained polarization information on both sides of the vacuum window and treating the vacuum window as an unknown wave plate, the phase delay and the fast axis azimuthal angle of the vacuum window can be determined in the form of Mueller matrix. The phase delay is determined to be 197.60(39)°, and the fast axis azimuthal angle is determined to be 104.00(5)°.
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Affiliation(s)
- W H Yuan
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - H L Liu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - W Z Wei
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Z Y Ma
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - P Hao
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Z Deng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - K Deng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - J Zhang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Z H Lu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
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Pan M, Zhang Y, Deng K, Liu G, Gu Z, Liu J, Luo K, Zhang W, Mai K. Forkhead box O1 in turbot Scophthalmus maximus: Molecular characterization, gene structure, tissue distribution and the role in glucose metabolism. Gene 2019; 708:49-56. [PMID: 30935922 DOI: 10.1016/j.gene.2019.03.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 01/05/2019] [Revised: 03/26/2019] [Accepted: 03/28/2019] [Indexed: 01/12/2023]
Abstract
Forkhead box O1 (foxo1) is a transcription factor and plays important roles in glucose metabolism. In the present study, foxo1 in turbot Scophthalmus maximus was cloned and characterized. The siRNA of foxo1 was used to investigate the functions of foxo1 in turbot hepatocytes glucose metabolism. After that, a 10-week feeding trial with two different dietary carbohydrate levels (15% and 21%, respectively) was conducted to analyze the function of foxo1 in glucose metabolism in vivo. Results showed that the foxo1 was identified as 2176 bp (base pair) with a 2025 bp open reading frame, which encoded 675 amino acids. Sequence analysis showed that foxo1 of turbot was highly homologous to most of fishes. Tissue distribution analysis revealed that the highest expression of foxo1 was in liver. After in vitro analysis, foxo1-specific small interfering RNA (sifoxo1) treatment significantly decreased the expressions of cytosolic phosphoenolpyruvate carboxykinase (cpepck) and glucose-6-phosphatase1(g6pase1) in primary hepatocytes. Expression of mitochondrial phosphoenolpyruvate carboxykinase (mpepck) was not significantly inhibited. In contrast, the expression of glucose-6-phosphatase2 (g6pase2) increased significantly. After the in vivo study (feeding trial), with the decreased expression of foxo1 in turbot due to high dietary carbohydrate level (21%), the expression of g6pase2 was significantly upregulated. However, the expression of glucokinase (gk) was not changed significantly. These increased the level of blood glucose and hepatic glycogen. In conclusion, data from both in vitro (primary hepatocytes) and in vivo (feeding trial) showed that downregulated foxo1 in turbot could not result in significant depression of gluconeogenesis and activation of glycolysis. This could be one of the reasons why intake of high level of carbohydrate resulted in prolonged hyperglycemia in turbot.
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Affiliation(s)
- Mingzhu Pan
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
| | - Yue Zhang
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
| | - Kangyu Deng
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
| | - Guangxia Liu
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
| | - Zhixiang Gu
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
| | - Jiahuan Liu
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
| | - Kai Luo
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
| | - Wenbing Zhang
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China.
| | - Kangsen Mai
- The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China
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Liu D, Deng K, Sampath WWHA, Gu Z, Pan M, Zhang Y, Zhang W, Mai K. Responses of glucosensing system to glucose in Japanese flounder Paralichthys olivaceus fed diets with different carbohydrate content. Comp Biochem Physiol B Biochem Mol Biol 2019; 232:72-78. [PMID: 30872147 DOI: 10.1016/j.cbpb.2019.03.001] [Citation(s) in RCA: 8] [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: 12/11/2018] [Revised: 03/01/2019] [Accepted: 03/05/2019] [Indexed: 01/06/2023]
Abstract
A 10-week feeding trial was conducted to investigate the response of glucosensing system to glucose in Japanese flounder Paralichthys olivaceus (initial body weight: 7.14 ± 0.10 g) fed diets with different carbohydrate content. Two experimental diets were designed as carbohydrate free (CF) and suitable carbohydrate (SC) supplementation, respectively. The dietary carbohydrate contents were 0.93% and 15.6%, respectively. After a 10-week feeding trial, a glucose tolerance test (GTT) was performed. Results showed that after the last meal in the feeding trial, the blood glucose of fish fed with diet CF peaked at 3 h (4.64 ± 0.29 mM), the duration of hyperglycemia was about 5 h (1-6 h). The blood glucose in SC group peaked at 9 h (3.28 ± 0.66 mM), and the duration of hyperglycemia was approximately 6 h (6-12 h). After GTT, blood glucose reached the first peak at 6 h both in the two groups, and the duration of hyperglycemia was obvious 24 h. During the 3-12 h after injection, blood glucose level in SC group was significantly higher than that in CF group. However, blood glucose level in group SC was significantly lower than that in group CF at 24 h. The blood glucose level decreased to half of the peak at 10.97 h after injection of glucose in SC group and at 27.26 h in CF group. The 6-24 h clearance ability in SC group (6.57 ± 1.68%/h) was significantly higher than that in CF group (2.81 ± 1.11%/h). Compared with CF diet, SC diet significantly increase the expression of glucosensing-related genes including glucose facilitative transporter type 2, glucokinase, inward rectifier K+ channel pore type 6.2, sulfonylurea receptor, carnitine palmitoyltransferase 1b, hydroxyacyl-CoA dehydrogenase, cytochrome c oxidase subunit 4, mitochondrial uncoupling protein 2a, liver X receptor, sodium/glucose co-transporter 1, a heterodimer of type 1 receptor subunits depending on T1R2 + T1R3 in liver and intestine. Meanwhile, activities of glucokinase, pyruvate kinase and glycogen synthase in liver, and hepatic glycogen content were also increased. In conclusion, glucosensing systems in Japanese flounder are responsive to dietary carbohydrate levels, especially the suitable dietary carbohydrate level, at which the glucose tolerance capacity of Japanese flounder was improved.
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Affiliation(s)
- Dong Liu
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China
| | - Kangyu Deng
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China
| | - W W H A Sampath
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China
| | - Zhixiang Gu
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China
| | - Mingzhu Pan
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China
| | - Yue Zhang
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China
| | - Wenbing Zhang
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao, National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China..
| | - Kangsen Mai
- The Key Laboratory of Mariculture, Ministry of Education, The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture and Rural Affairs, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao, National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China
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15
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Gu Z, Mu H, Shen H, Deng K, Liu D, Yang M, Zhang Y, Zhang W, Mai K. High level of dietary soybean oil affects the glucose and lipid metabolism in large yellow croaker Larimichthys crocea through the insulin-mediated PI3K/AKT signaling pathway. Comp Biochem Physiol B Biochem Mol Biol 2019; 231:34-41. [PMID: 30772486 DOI: 10.1016/j.cbpb.2018.12.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 11/02/2018] [Accepted: 12/06/2018] [Indexed: 12/17/2022]
Abstract
The present study was conducted to investigate the metabolic responses of glucose and lipid in large yellow croaker Larimichthys crocea (initial weight, 36.80 ± 0.39 g) to high level of dietary soybean oil. Three isonitrogenous (46% crude protein) and isolipidic (13% crude lipid) experimental diets were designed, with 100% fish oil (FO), 50% fish oil and 50% soybean oil (FS) and 100% soybean oil (SO), respectively. After a 12-week growth trial, the results showed that compared with FO group, contents n-6 PUFAs increased while the n-3 PUFAs decreased significantly both in liver and muscle in FS and SO groups. Concentrations of blood glucose, leptin, free fatty acid and total triglyceride reached the highest values in SO group, while blood insulin showed no significant difference among all groups. The gene expressions of insulin receptor substrate-2, glucose-6-phosphatase, phosphoenolpyruvate carboxykinase, fatty acid synthetase, and lipoprotein lipase increased, and the insulin receptor substrate-1, phosphotidylinsositol-3-kinase (PI3K), hexokinase, glycogen synthetase and glucose transporter 2 in liver decreased significantly in SO group. Meanwhile, the phosphorylation of protein kinase B (AKT) also decreased significantly in this group. These results suggested that high level of dietary soybean oil depressed PI3K/AKT signaling pathway, and then affected glucose and lipid metabolism by glycolysis, gluconeogenesis, glucose transportation, glycogenesis and lipogenesis.
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Affiliation(s)
- Zhixiang Gu
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Hua Mu
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Haohao Shen
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Kangyu Deng
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Dong Liu
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Mengxi Yang
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Yue Zhang
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Wenbing Zhang
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China.
| | - Kangsen Mai
- The Key Laboratory of Mariculture (Ministry of Education), The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture), Fisheries College, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China
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16
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Liu D, Guo B, Han D, Deng K, Gu Z, Yang M, Xu W, Zhang W, Mai K. Comparatively study on the insulin-regulated glucose homeostasis through brain-gut peptides in Japanese flounder Paralichthys olivaceus after intraperitoneal and oral administration of glucose. Gen Comp Endocrinol 2018; 266:9-20. [PMID: 29454596 DOI: 10.1016/j.ygcen.2018.02.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 02/09/2018] [Accepted: 02/14/2018] [Indexed: 01/22/2023]
Abstract
The present study comparatively analyzed the blood glucose and insulin concentration, the temporal and spatial expression of brain-gut peptides and the key enzymes of glycolysis and gluconeogenesis in Japanese flounder by intraperitoneal injection (IP) and oral administration (OR) of glucose. Samples were collected at 0, 1, 3, 5, 7, 9, 12, 24 and 48 h after IP and OR glucose, respectively. Results showed that the hyperglycemia lasted for about 10 h and 21 h in OR and IP group, respectively. The serum insulin concentration significantly decreased at 3 h (1.58 ± 0.21 mIU/L) after IP glucose. However, it significantly increased at 3 h (3.37 ± 0.341 mIU/L) after OR glucose. The gene expressions of prosomatostatin, neuropeptide Y, cholecystokinin precursor and orexin precursor in the brain showed different profiles between the OR and IP group. The OR not IP administration of glucose had significant effects on the gene expressions of preprovasoactive intestinal peptide, pituitary adenylate cyclase activating polypeptide and gastrin in intestine. In conclusion, brain-gut peptides were confirmed in the present study. And the serum insulin and the brain-gut peptides have different responses between the IP and OR administration of glucose. The OR could stimulate the brain-gut peptide expressions, which have effects on the insulin secretion and then regulate the blood glucose levels. However, in IP group, there is little chance to stimulate brain-gut peptide expression to influence the insulin secretion, which leads to a longer hyperglycemia.
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Affiliation(s)
- Dong Liu
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China
| | - Benyue Guo
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China
| | - Dongdong Han
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China
| | - Kangyu Deng
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China
| | - Zhixiang Gu
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China
| | - Mengxi Yang
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China
| | - Wei Xu
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China
| | - Wenbing Zhang
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China.
| | - Kangsen Mai
- The Key Laboratory of Mariculture, Ministry of Education; The Key Laboratory of Aquaculture Nutrition and Feeds, Ministry of Agriculture; Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Wen Hai Road, Qingdao 266237, China
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Zeng XY, Ye YX, Shi XH, Wang ZY, Deng K, Zhang J, Lu ZH. Thermal-noise-limited higher-order mode locking of a reference cavity. Opt Lett 2018; 43:1690-1693. [PMID: 29652341 DOI: 10.1364/ol.43.001690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/06/2018] [Indexed: 06/08/2023]
Abstract
Higher-order mode locking has been proposed to reduce the thermal noise limit of reference cavities. By locking a laser to the HG02 mode of a 10-cm long all ultra-low expansion (ULE) cavity and measuring its performance with the three-cornered-hat method among three independently stabilized lasers, we demonstrate a thermal-noise-limited performance of a fractional frequency instability of 4.9×10-16. The results match the theoretical models with higher-order optical modes. The achieved laser instability improves the all ULE short cavity results to a new low level.
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18
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Shazer A, Stewart D, Deng K, Tortorello M. Approaches toward Identification of Surrogates To Validate Antimicrobial Washes as Preventive Controls for Fresh-Cut Leafy Greens. J Food Prot 2017; 80:1600-1604. [PMID: 28853631 DOI: 10.4315/0362-028x.jfp-17-069] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In fresh-cut produce production, antimicrobials may be used during washing to control the risk of cross-contamination by microbial hazards. Surrogate microorganisms have long been used to validate processes, but none have been identified for validating the efficacy of antimicrobial washing of fresh-cut produce. The objective of this study was to develop procedures by which surrogates may be identified for use in validating the control of cross-contamination for fresh-cut lettuce operations. Four microbial characteristics, which may be important factors in cross-contamination events, were quantitatively evaluated in potential surrogate microorganisms for comparison to a reasonably foreseeable hazard, Escherichia coli O157:H7: sensitivity to chlorine in solution, sensitivity to chlorine on lettuce leaf surfaces, shedding from contaminated lettuce leaves into the water during washing, and cross-contamination from inoculated to uninoculated lettuce leaves during chorine washing. A procedure of practical quantitative experiments for comparing the characteristics reduced the original pool of 80 potential strains, which consisted of lactic acid bacteria, probiotics, and isolates obtained from lettuce enrichment cultures, to five strains: Lactobacillus plantarum, Pediococcus pentosaceus, probiotic 22C, and two lettuce enrichment isolates. These strains may be evaluated in additional studies involving comparisons to other reasonably foreseeable hazards and including other potential process variables that should be understood and controlled to prevent cross-contamination in fresh-cut lettuce operations.
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Affiliation(s)
- A Shazer
- 1 U.S. Food and Drug Administration, Division of Food Processing Science and Technology, Illinois Institute of Technology, 6502 South Archer Road, Bedford Park, Illinois 60501, USA
| | - D Stewart
- 1 U.S. Food and Drug Administration, Division of Food Processing Science and Technology, Illinois Institute of Technology, 6502 South Archer Road, Bedford Park, Illinois 60501, USA
| | - K Deng
- 2 Institute for Food Safety and Health, Illinois Institute of Technology, 6502 South Archer Road, Bedford Park, Illinois 60501, USA
| | - M Tortorello
- 1 U.S. Food and Drug Administration, Division of Food Processing Science and Technology, Illinois Institute of Technology, 6502 South Archer Road, Bedford Park, Illinois 60501, USA
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Chen M, Deng K, Zeng WH, Zeng JJ, Zhong QS, Han ZM. [Minimally invasive tarsal sinus incision combined with manipulative reduction and internal fixation for calcaneal fractures of Sanders typeⅡ and Ⅲ]. Zhonghua Wai Ke Za Zhi 2017; 55:220-223. [PMID: 28241725 DOI: 10.3760/cma.j.issn.0529-5815.2017.03.011] [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 method and curative effect of plate fixation or percutaneous screws for the treatment of calcaneal fractures of Sanders type Ⅱ and Ⅲ via a minimally invasive sinus tarsi incision combined with a variety of manipulative reduction methods. Methods: Twenty-one patients with closed calcaneal fractures treated in the Department of Orthopedics, the First Affiliated Hospital of Nanchang University from January 2014 to January 2016 were collected. There were 15 men and 6 women, with an average age of 39.3 years(from 25 to 63 years). According to the Sanders classification, 16 cases were type Ⅱ and 5 were type Ⅲ.All cases were treated with internal fixation with plate and percutaneous screws via the mini-open sinus tarsi approach following reduction of the posterior articular surface of the subtalar joint and calcaneal length, width and height.Statistical analysis was performed on calcaneal width and Böhler angle, Gissane angle preoperatively and postoperatively (3 days and 3 months). All data were analyzed by ANOVA, functional recovery was evaluated according to the Ankle and Hind-foot Score of American Orthopedic Foot and Ankle Society (AOFAS). Results: Twenty one patients were followed up for a mean duration of 13.4 months(6 to 24 months). All cases gained primary incision healing, without complications such as skin necrosis, wound infection, tenosynovitis of peroneus longus and brevis muscles, or fracture displacement and hardware failure.Bone union was achieved at an average of 10.5 weeks(9 to 11 weeks). No obvious malunion occurred by the last follow-up. Compared to preoperative, calcaneal width(F=25.62, 38.90) were significantly improved 3 days and 3 months after surgery, Böhler angle(F=440.24, 272.42) and Gissane angle(F=91.86, 43.74) were normal, the differences were statistically significant (all P<0.05). Compared to 3 days after surgery, calcaneal width, Böhler angle and Gissane angle kept normal 3 months after surgery, there were no statistically differences (F=0.26, 1.35, 2.60, all P>0.05). By the AOFAS scoring, 10 cases were rated as excellent, 7 were good and 4 were fair. Conclusions: Fixation with plate and percutaneous screws via the mini-open sinus tarsi approach is an effective treatment for Sanders types Ⅱ and Ⅲ calcaneal fractures, which with the advantages of small wound, simple operation, reliable fixation, no incision complication, especially suitable for elderly patients and the patients with severe injury of local soft tissue.
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Affiliation(s)
- M Chen
- Department of Orthopaedics, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Zhang LY, Deng K, Zhang Y, Feng M, Bao XJ, Liu XH, Xing B, Lian W, Wang RZ, Yao Y. [Analysis of outcomes and learning curve of endoscopic transsphenoidal surgeries for 124 patients with pituitary adenomas]. Zhonghua Yi Xue Za Zhi 2017; 96:1485-8. [PMID: 27266492 DOI: 10.3760/cma.j.issn.0376-2491.2016.19.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the outcomes of the Endoscopic transsphenoidal surgery for patients with pituitary adenomas, analyze the learning curve and provide reference for future surgeries. METHODS Retrospective analysis was carried out on 124 patients by endoscopic transsphenoidal surgery with a single neurosurgeon over a period spanning from January 2010 to January 2014 at Peking Union Medical College Hospital.The changes of endocrine and tumor imaging before and after surgery were analysed. Operative time and complication rates of one surgeon in the early period of learning curve were compared with that in later period. RESULTS There were significant differences in Gross total resection (GTR) rate of pituitary adenomas with different sizes and different Knosp classifications (P<0.01, P<0.01). GTR rate of huge adenomas was significantly lower than that of macroadenoma and adenomas (P<0.05). GTR rate of Knosp 4 grade adenoma was significantly lower than that of Knosp 0-3 level (P<0.05). No significant difference in GTR among all types of functional pituitary adenomas and hormone levels after surgery was observed (P>0.05). In addition, no significant difference (P>0.05) in complications among different sizes, Knosp grade and type of pituitary adenomas was observed.GTR of Knosp 4 adenoma in later period of the learning curve was significantly higher than that in early period (P<0.05). Meanwhile the operative time was significantly lower than early period (P<0.05). CONCLUSIONS Endoscopic transsphenoidal pituitary adenoma resection has the advantages of wider surgical field, higher GTR rate, less trauma, fewer complications and better life quality of patients.Through standardized learning, the GTR rate of the invasive pituitary adenomas can be improved.
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Affiliation(s)
- L Y Zhang
- Department of Graduate, Hebei North University, Zhangjiakou 075000, Chian; Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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Zhang LY, Deng K, Zhang Y, Yao Y, Zhu HJ, Jin ZM, Pan H. [Treatment effects analysis of preoperative long-acting somatostatin analogs combined trans-sphenoidal endoscopic surgery for patients with growth hormone secreting pituitary macroadenomas]. Zhonghua Yi Xue Za Zhi 2017; 97:375-379. [PMID: 28219196 DOI: 10.3760/cma.j.issn.0376-2491.2017.05.011] [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 treatment effects of preoperative long-acting somatostatin analogue (SSA) combined trans-sphenoidal endoscopic surgery for patients with growth hormone (GH)-secreting pituitary macroadenomas. Methods: Retrospective analysis was carried out on 20 patients with GH-secreting pituitary macroadenomas who were treated with preoperative SSA and trans-sphenoidal endoscopic surgery in our apartment from January 2010 to January 2016. We also selected 20 patients with only trans-sphenoidal endoscopic surgery treatment and 20 patients with preoperative SSA and non-trans-sphenoidal endoscopic surgery treatment. The changes of tumor imaging, endocrine and blood pressure before and after treatment were analysed. Results: The Gross total resection (GTR) rate of invasive GH-secreting pituitary macroadenomas of preoperative SSA combined trans-sphenoidal endoscopic surgery group (8/13) were higher than that if only trans-sphenoidal endoscopic surgery group (4/16) and preoperative SSA combined non endoscopic surgery group (1/8) (P<0.05). Meanwhile, preoperative SSA combined trans-sphenoidal endoscopic surgery group had significantly improved the GH levels, blood glucose, lipid metabolism and blood pressure levels (P<0.05). Conclusion: The trans-sphenoidal endoscopic surgery on patients with GH-secreting pituitary macroadenomas has a significant improvement on GH levels, blood glucose, lipid metabolism and blood pressure levels. Through the treatment of preoperative long-acting SSA, the gross total resection rate is higher than other two groups.
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Affiliation(s)
- L Y Zhang
- Department of neurosurgery and Endocrinology, Peking Union Medical College Hospital, Beijing 100730, China
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Gombas D, Luo Y, Brennan J, Shergill G, Petran R, Walsh R, Hau H, Khurana K, Zomorodi B, Rosen J, Varley R, Deng K. Guidelines To Validate Control of Cross-Contamination during Washing of Fresh-Cut Leafy Vegetables. J Food Prot 2017; 80:312-330. [PMID: 28221982 DOI: 10.4315/0362-028x.jfp-16-258] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The U.S. Food and Drug Administration requires food processors to implement and validate processes that will result in significantly minimizing or preventing the occurrence of hazards that are reasonably foreseeable in food production. During production of fresh-cut leafy vegetables, microbial contamination that may be present on the product can spread throughout the production batch when the product is washed, thus increasing the risk of illnesses. The use of antimicrobials in the wash water is a critical step in preventing such water-mediated cross-contamination; however, many factors can affect antimicrobial efficacy in the production of fresh-cut leafy vegetables, and the procedures for validating this key preventive control have not been articulated. Producers may consider three options for validating antimicrobial washing as a preventive control for cross-contamination. Option 1 involves the use of a surrogate for the microbial hazard and the demonstration that cross-contamination is prevented by the antimicrobial wash. Option 2 involves the use of antimicrobial sensors and the demonstration that a critical antimicrobial level is maintained during worst-case operating conditions. Option 3 validates the placement of the sensors in the processing equipment with the demonstration that a critical antimicrobial level is maintained at all locations, regardless of operating conditions. These validation options developed for fresh-cut leafy vegetables may serve as examples for validating processes that prevent cross-contamination during washing of other fresh produce commodities.
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Affiliation(s)
- D Gombas
- United Fresh Produce Association, 1901 Pennsylvania Avenue N.W., Washington, D.C. 20006
| | - Y Luo
- U.S. Department of Agriculture, 10200 Baltimore Avenue, Beltsville, Maryland 20705
| | - J Brennan
- SmartWash Solutions, 1129 Harkins Road, Salinas, California 93901
| | - G Shergill
- Taylor Fresh Foods, 150 Main Street, Salinas, California 93901
| | - R Petran
- Ecolab, Inc., 655 Lone Oak Drive, Eagan, Minnesota 55121
| | - R Walsh
- Ecolab, Inc., 655 Lone Oak Drive, Eagan, Minnesota 55121
| | - H Hau
- Ecolab, Inc., 655 Lone Oak Drive, Eagan, Minnesota 55121
| | - K Khurana
- Pulse Instruments, 943 Flynn Road, Camarillo, California 93012
| | - B Zomorodi
- Apio, Inc., 4719 West Main Street, Guadalupe, California 93434
| | - J Rosen
- JC Rosen Resources, 1123 Ripple Avenue, Pacific Grove, California 93950
| | - R Varley
- KiVAR Chemical Technologies, 6077 Coffee Road, Bakersfield, California 93308
| | - K Deng
- Institute for Food Safety and Health, Illinois Institute of Technology, 6502 South Archer Road, Bedford Park, Illinois 60501, USA
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Feng M, Liu XH, Bao XJ, Yong CX, Lu L, Deng K, Lian W, Xing B, Zhu HJ, Ma WB, Yan Y, Wang RZ. [The value and comparison of plasma adrenocorticotropic hormone and urinary free cortisol in predicting long-term outcome after operation of Cushing's disease]. Zhonghua Yi Xue Za Zhi 2016; 96:3662-3665. [PMID: 27978903 DOI: 10.3760/cma.j.issn.0376-2491.2016.45.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study and the value of morning plasma adrenocorticotropic hormone (ACTH) and urinary free cortisol (24 h UFC) within 3 days after operation in patients with Cushing's disease in predicting the long-term outcome. Methods: The clinical data of 140 patients with Cushing's disease who were treated in Department of Neurosurgery of PUMCH from 2012 to 2014 were analyzed retrospectively.The univariate analysis, multivariate Logistic analysis, ROC curve analysis and other statistical methods were used to study the predicting value of morning plasma ACTH and 24 h UFC in 3 days post operation. Results: Univariate analysis showed that in the two groups of the early remission and no remission, there was significant statistical difference between the preoperative ACTH, preoperative 24 h UFC, postoperative ACTH and postoperative 24 h UFC (P<0.05, <0.01, <0.01). Logistic analysis showed that ACTH and 24 h UFC after operation of two groups had significant difference (P<0.01, <0.05). ROC curve analysis showed that postoperative cutoff values of ACTH and 24 h UFC were 4.11 pmol/L (18.7 pg/ml) and 281.42 nmol (102 μg)/24 h. ROC analysis was performed to evaluate the predicting performance of postoperative ACTH, resulting in an area under the curve (AUC) of 0.917 (95%CI: 0.858-0.957, P<0.01). In comparison, 24 h UFC had an AUC of 0.814 (95%CI: 0.739-0.875, P<0.01). The predicting value of ACTH is significantly better than that of 24 h UFC (P=0.005). Conclusion: Early morning 24 h UFC and ACTH within 3 days after operation both showed considerable accuracy in predicting the long-term outcome of Cushing's disease, and the significance of ACTH was even greater than that of 24 h UFC.
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Affiliation(s)
- M Feng
- *Department of Neurosurgery, Pekinbng Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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Zhang J, Shi XH, Zeng XY, Lü XL, Deng K, Lu ZH. Characterization of electrical noise limits in ultra-stable laser systems. Rev Sci Instrum 2016; 87:123105. [PMID: 28040928 DOI: 10.1063/1.4971852] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate thermal noise limited and shot noise limited performance of ultra-stable diode laser systems. The measured heterodyne beat linewidth between such two independent diode lasers reaches 0.74 Hz. The frequency instability of one single laser approaches 1.0 × 10-15 for averaging time between 0.3 s and 10 s, which is close to the thermal noise limit of the reference cavity. Taking advantage of these two ultra-stable laser systems, we systematically investigate the ultimate electrical noise contributions, and derive expressions for the closed-loop spectral density of laser frequency noise. The measured power spectral density of the beat frequency is compared with the theoretically calculated closed-loop spectral density of the laser frequency noise, and they agree very well. It illustrates the power and generality of the derived closed-loop spectral density formula of the laser frequency noise. Our result demonstrates that a 10-17 level locking in a wide frequency range is feasible with careful design.
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Affiliation(s)
- J Zhang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - X H Shi
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - X Y Zeng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - X L Lü
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - K Deng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z H Lu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
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Shi X, Kong J, Meng X, Luan S, Luo K, Cao B, Liu N, Lu X, Deng K, Cao J, Zhang Y, Zhang H, Li X. Comparative microarray profile of the hepatopancreas in the response of "Huanghai No. 2" Fenneropenaeus chinensis to white spot syndrome virus. Fish Shellfish Immunol 2016; 58:210-219. [PMID: 27591045 DOI: 10.1016/j.fsi.2016.07.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 06/30/2016] [Accepted: 07/25/2016] [Indexed: 06/06/2023]
Abstract
White spot syndrome virus (WSSV) infects all shrimp species and is the greatest detriment to shrimp culture. To better understand the mechanism of molecular responses to WSSV infection in "Huanghai No. 2" Fenneropenaeus chinensis, a microarray technique was used. Microarray gene expression profiling of 59,137 unigenes identified Differentially Expressed Genes (DEGs) both in live and moribund shrimp at early, peak and late phases. In live shrimp, 1307, 1479 and 1539 DEGs were obtained in the early, peak and late phase, respectively. Meanwhile, 1536, 2181 and 1591 DEGs were obtained in moribund shrimp. Twenty known annotation genes are uniquely expressed in the late phase of live shrimp, including adhesion regulating molecule 1, arginine kinase, BUD31 homolog, and QM. Compared to WSSV-susceptible shrimp, 75 known annotation genes are uniquely expressed in WSSV-resistant shrimp, including arginine kinase, BUD31 homolog, clottable protein 2, caspase 2, cathepsin C, calnexin, HMGBb, Histone 3, and selenoprotein M. The gene expression patterns of the infected shrimp were altered by WSSV infection. To further confirm the expression of differentially expressed genes, real-time RT-PCR was performed to test six randomly selected genes. The data will provide valuable information to understand the immune mechanism of shrimp's response to WSSV.
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Affiliation(s)
- Xiaoli Shi
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Jie Kong
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China.
| | - Xianhong Meng
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Sheng Luan
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Kun Luo
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Baoxiang Cao
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Ning Liu
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Xia Lu
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Kangyu Deng
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Jiawang Cao
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Yingxue Zhang
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Hengheng Zhang
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
| | - Xupeng Li
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Nanjing Road 106, Qingdao 266071, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao 266071, PR China
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Feng M, Lu L, Bao XJ, Liu XH, Deng K, Dai CX, Xing B, Lian W, Wei JJ, Yao Y, Zhu HJ, Wang RZ. [Use early morning serum cortisollevel to evaluate the effect of Cushing's disease after transsphenoidal surgery]. Zhonghua Yi Xue Za Zhi 2016; 96:2458-61. [PMID: 27562042 DOI: 10.3760/cma.j.issn.0376-2491.2016.31.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To predict the therapeutic effect of Cushing's disease after transsphenoidal surgery by using morning serum cortisol level. METHODS The clinical data of 275 cases that had transsphenoidal surgery in Peking Union Medical College Hospital from 2010 to 2014 were analyzed retrospectively.Early morning serum cortisol level less than 140 nmol/L 3 days postoperation was usedto predict endocrinological remission. And long-term efficacy was evaluated by follow-up. RESULTS Of the 275 patients, there were 49 males and 226 females; average age was 36.5 years old.Remission wasconfirmed in 201 cases, the remission rate was 73.1%, and 8 cases recurrent duringfollow-up.There were 17 macroadenomas, theremission rate was 47.1%; 258 microadenomas and MRI negative adenomas, the remission rate was 74.8%.And 43 recurrent cases had reoperations; the remission rate was 46.5%. CONCLUSION Early morningserum cortisol 3 days post operation can evaluate the effectof transsphenoidal surgery, but even if the level of cortisol is less than 140 nmol/L, there is still tumor recurrence.Patients should be follow-up for a lifetime.
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Affiliation(s)
- M Feng
- Peking Union Medical College Hospital, CAMS& PUMC, Beijing 100730, China
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Fu Q, Shu Z, Deng K, Luo X, Zeng CG. [Simultaneous Determination of Three Kinds of Effective Constituents in Cannabis Plants by Reversed-phase HPLC]. Fa Yi Xue Za Zhi 2016; 32:261-263. [PMID: 29188667 DOI: 10.3969/j.issn.1004-5619.2016.04.006] [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] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Indexed: 06/07/2023]
Abstract
OBJECTIVES To establish a high performance liquid chromatographic (HPLC) method for simultaneous determination of three effective constituents, including tetrahydrocannabinol (THC), cannabidiol (CBD) and cannabinol (CBN) in Cannabis plants. METHODS A C₁₈ column was used in this study, and acetonitrile-phosphate buffer (0.015 mol/L KH₂PO₄) was used as mobile phase at a flow rate of 1.0 mL/min. At a detection wavelength of 220 mm, UV absorption spectra were collected at the wavelength range of 190-400 nm, and the spectra and retention time were counted as qualitative evidence. RESULTS THC, CBD and CBN could be well separated by this method. Three components had good linear relationship in the range of 0.4-40 μg/mL (R²≥0.999 3). The recoveries were over 87%. The limits of detection were 1.8 ng, 2.0 ng and 1.3 ng, respectively. The relative standard deviation (RSD) were less than 5% for both inter-day and intra-day precisions. CONCLUSIONS Reversed-phase HPLC method is simple, rapid and accurate, and it is suitable for the qualitative and quantitative detection of THC, CBD and CBN in Cannabis plants.
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Affiliation(s)
- Q Fu
- Criminal Police Branch, Deyang Public Security Bureau, Deyang 618000, China
| | - Z Shu
- Lincang Public Security Bureau, Lincang 677000, China
| | - K Deng
- Criminal Police Branch, Deyang Public Security Bureau, Deyang 618000, China
| | - X Luo
- Criminal Police Branch, Deyang Public Security Bureau, Deyang 618000, China
| | - C G Zeng
- Criminal Police Branch, Deyang Public Security Bureau, Deyang 618000, China
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Wang YS, Zhou P, Liu H, Li S, Zhao Y, Deng K, Cao DD, Che LQ, Fang ZF, Xu SY, Lin Y, Feng B, Li J, Wu D. Effects of Inulin Supplementation in Low- or High-Fat Diets on Reproductive Performance of Sows and Antioxidant Defence Capacity in Sows and Offspring. Reprod Domest Anim 2016; 51:492-500. [PMID: 27174736 DOI: 10.1111/rda.12707] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/12/2016] [Indexed: 01/10/2023]
Abstract
This experiment was conducted to investigate the effects of inulin supplementation in low- or high-fat diets on both the reproductive performance of sow and the antioxidant defence capacity in sows and offspring. Sixty Landrace × Yorkshire sows were randomly allocated to four treatments with low-fat diet (L), low-fat diet containing 1.5% inulin (LI), high-fat diet (H) and high-fat diet containing 1.5% inulin (HI). Inulin-rich diets lowered the within-litter birth weight coefficient of variation (CV, p = 0.05) of piglets, increased the proportion of piglets weighing 1.0-1.5 kg at farrowing (p < 0.01), reduced the loss of body weight (BW) and backfat thickness (BF) during lactation (p < 0.05) and decreased the duration of farrowing as well as improved sow constipation (p < 0.05). Sows fed fat-rich diets gained more BW during gestation (p < 0.01), farrowed a greater number of total (+1.65 pigs, p < 0.05) and alive (+1.52 pigs p < 0.05) piglets and had a heavier (+2.06 kg, p < 0.05) litter weight at birth as well as a decreased weaning-to-oestrous interval (WEI, p < 0.01) compared with sows fed low-fat diets. However, it is worth noting that the H diet significantly decreased the serum activities of superoxide dismutase (T-SOD) and glutathione peroxidase (GSH-Px) and increased the serum malondialdehyde (MDA) levels in sows and piglets (p < 0.05). In contrast, HI diet enhanced the activities of T-SOD and GSH-Px and decreased the serum MDA concentrations (p < 0.05) in sows and piglets. In summary, the fat-rich diets fed to sows during gestation had beneficial effects on reproductive performance, but aggravated the oxidative stress in sow and piglets. Inulin-rich diets fed to sow during gestation had beneficial effects on within-litter uniformity of piglet birthweight and enhanced the antioxidant defence capacity of sows and piglets.
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Affiliation(s)
- Y S Wang
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - P Zhou
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - H Liu
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - S Li
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - Y Zhao
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - K Deng
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - D D Cao
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - L Q Che
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - Z F Fang
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - S Y Xu
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - Y Lin
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - B Feng
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - J Li
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
| | - D Wu
- Key Laboratory for Animal Disease-Resistance Nutrition of the Ministry of Agriculture of China, Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, China
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Li GJ, Gao J, Wang GL, Zhang CQ, Shi H, Deng K. Correlation between vascular endothelial growth factor and quantitative dual-energy spectral CT in non-small-cell lung cancer. Clin Radiol 2016; 71:363-8. [PMID: 26873627 DOI: 10.1016/j.crad.2015.12.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 12/07/2015] [Accepted: 12/21/2015] [Indexed: 01/11/2023]
Abstract
AIM To explore the correlation between the expression level of vascular endothelial growth factor (VEGF) in non-small-cell lung cancer (NSCLC) tissue and quantitative parameters of spectral computed tomography (CT) imaging. MATERIALS AND METHODS Forty-eight patients with NSCLC underwent a spectral CT imaging protocol before surgical tumour resection. The repetition of iodine concentration, water concentration, and CT values at 40 keV in the region of interest were measured. The slopes of spectral attenuation curves (λHU) in the region were also calculated. The level of VEGF expression in the tumour tissue was measured using an immunohistochemical method (MaxVision method). The quantitative parameters of spectral CT imaging were compared among different levels of VEGF expression using one-way analysis of variance (ANOVA) and least significant difference (SLD) test. The correlation between VEGF expression and spectral CT imaging was estimated through Spearman's rank correlation analysis. RESULTS There were significant differences in iodine concentrations, λHU, and CT values at 40 KeV in NSCLC between the groups showing negative and moderately positive expression of VEGF (p=0.001, 0.000, and 0.001, respectively) as well as between those showing mildly and moderately positive expression of VEGF (p=0.047, 0.005, and 0.002, respectively). In addition, all of the iodine concentrations, λHU values, and CT values at 40 KeV displayed a significant and positive correlation with the level of VEGF expression (r=0.413, 0.458, and 0.393, respectively, p<0.05). CONCLUSIONS Quantitative parameters of spectral CT imaging may be helpful for evaluating the status of angiogenesis in NSCLC.
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Affiliation(s)
- G J Li
- Department of Radiology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, China
| | - J Gao
- Department of Radiology, Jinan Central Hospital Affiliated to Shandong University, Jinan, China
| | - G L Wang
- Department of Radiology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, China.
| | - C Q Zhang
- Department of Radiology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, China.
| | - H Shi
- Department of Radiology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, China
| | - K Deng
- Department of Radiology, Qianfoshan Hospital Affiliated to Shandong University, Jinan, China
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Zhang J, Wu W, Shi XH, Zeng XY, Deng K, Lu ZH. Design verification of large time constant thermal shields for optical reference cavities. Rev Sci Instrum 2016; 87:023104. [PMID: 26931831 DOI: 10.1063/1.4941718] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In order to achieve high frequency stability in ultra-stable lasers, the Fabry-Pérot reference cavities shall be put inside vacuum chambers with large thermal time constants to reduce the sensitivity to external temperature fluctuations. Currently, the determination of thermal time constants of vacuum chambers is based either on theoretical calculation or time-consuming experiments. The first method can only apply to simple system, while the second method will take a lot of time to try out different designs. To overcome these limitations, we present thermal time constant simulation using finite element analysis (FEA) based on complete vacuum chamber models and verify the results with measured time constants. We measure the thermal time constants using ultrastable laser systems and a frequency comb. The thermal expansion coefficients of optical reference cavities are precisely measured to reduce the measurement error of time constants. The simulation results and the experimental results agree very well. With this knowledge, we simulate several simplified design models using FEA to obtain larger vacuum thermal time constants at room temperature, taking into account vacuum pressure, shielding layers, and support structure. We adopt the Taguchi method for shielding layer optimization and demonstrate that layer material and layer number dominate the contributions to the thermal time constant, compared with layer thickness and layer spacing.
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Affiliation(s)
- J Zhang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - W Wu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - X H Shi
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - X Y Zeng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - K Deng
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z H Lu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
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Liu S, Song L, Cram DS, Xiong L, Wang K, Wu R, Liu J, Deng K, Jia B, Zhong M, Yang F. Traditional karyotyping vs copy number variation sequencing for detection of chromosomal abnormalities associated with spontaneous miscarriage. Ultrasound Obstet Gynecol 2015; 46:472-477. [PMID: 25767059 DOI: 10.1002/uog.14849] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [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: 09/13/2014] [Revised: 02/19/2015] [Accepted: 03/10/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVES To compare the performance of traditional G-banding karyotyping with that of copy number variation sequencing (CNV-Seq) for detection of chromosomal abnormalities associated with miscarriage. METHODS Products of conception (POC) were collected from spontaneous miscarriages. Chromosomal abnormalities were detected using high-resolution G-banding karyotyping and CNV sequencing. Quantitative fluorescent polymerase chain reaction analysis of maternal and POC DNA for short tandem repeat (STR) markers was used to both monitor maternal cell contamination and confirm the chromosomal status and sex of the miscarriage tissue. RESULTS A total of 64 samples of POC, comprising 16 with an abnormal and 48 with a normal karyotype, were selected and coded for analysis by CNV-Seq. CNV-Seq results were concordant for 14 (87.5%) of the 16 gross chromosomal abnormalities identified by karyotyping, including 11 autosomal trisomies and three sex chromosomal aneuploidies (45,X). Of the two discordant results, a 69,XXX polyploidy was missed by CNV-Seq, although supporting STR marker analysis confirmed the triploidy. In contrast, CNV-Seq identified a sample with 45,X karyotype as a 45,X/46,XY mosaic. In the remaining 48 samples of POC with a normal karyotype, CNV-Seq detected a 2.58-Mb 22q deletion associated with DiGeorge syndrome and nine different smaller CNVs of no apparent clinical significance. CONCLUSIONS CNV-Seq used in parallel with STR profiling is a reliable and accurate alternative to karyotyping for identifying chromosome copy number abnormalities associated with spontaneous miscarriage.
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Affiliation(s)
- S Liu
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - L Song
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - D S Cram
- Berry Genomics, Chaoyang District, Beijing, China
| | - L Xiong
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - K Wang
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - R Wu
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - J Liu
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Guangzhou, Guangdong, China
| | - K Deng
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - B Jia
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - M Zhong
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
| | - F Yang
- Southern Medical University, Nanfang Hospital, Department of Obstetrics and Gynecology, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Guangzhou, Guangdong, China
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Chen Y, Shi Y, Ruan X, Long X, Kang Y, Deng K. The effects of spark plasma sintering on fluorine-substituted hydroxyapatite/zirconia composites. ACTA ACUST UNITED AC 2015. [DOI: 10.1179/1432891715z.0000000001325] [Citation(s) in RCA: 2] [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: 10/31/2022]
Affiliation(s)
- Y. Chen
- Key Laboratory of Hubei Province for Waterjet Theory & New Technology, Wuhan University, Wuhan, China
| | - Y. Shi
- Key Laboratory of Hubei Province for Waterjet Theory & New Technology, Wuhan University, Wuhan, China
| | - X. Ruan
- Key Laboratory of Hubei Province for Waterjet Theory & New Technology, Wuhan University, Wuhan, China
| | - X. Long
- Key Laboratory of Hubei Province for Waterjet Theory & New Technology, Wuhan University, Wuhan, China
| | - Y. Kang
- Key Laboratory of Hubei Province for Waterjet Theory & New Technology, Wuhan University, Wuhan, China
| | - K. Deng
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commision & Ministry of Education South-central University for Nationalities, Wuhan, China
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Chen K, Deng K, Wang X, Wang Z, Zheng S, Ren H, He D, Han Y, Asico LD, Jose PA, Zeng C. ASSA14-03-06 Activation of D 4dopamine receptor decreases AT 1angiotensin II receptor expression in rat renal proximal tubule cells. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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34
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Deng K, Sun YL, Yuan WH, Xu ZT, Zhang J, Lu ZH, Luo J. A modified model of helical resonator with predictable loaded resonant frequency and Q-factor. Rev Sci Instrum 2014; 85:104706. [PMID: 25362433 DOI: 10.1063/1.4897478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
High voltage radio frequency (RF) supply is a critical part in an ion trapping system. The RF supply should have high Q-factor and relatively high driving frequency. A frequently used RF supply for an ion trap system is a helical resonator. In certain applications, it is advantageous to have a predictable resonant frequency and Q-factor when the helical resonator is connected to a capacitive load. We develop a model to describe the behavior of a helical resonator with capacitive load. With this model, we can correctly predict the loaded resonant frequency and the loaded Q-factor. To test our prediction, we construct a helical resonator, and measure its resonant frequencies and Q-factors under different capacitive loads. The experimental results agree with our prediction.
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Affiliation(s)
- K Deng
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Y L Sun
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - W H Yuan
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z T Xu
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - J Zhang
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z H Lu
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - J Luo
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
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Tao X, Shi Z, Xiong L, Ke Y, Deng K, Liu M, Tian Q, Yuan Y. In-Vitro and Clinical Study on a Novel Synthetic Absorbable Dural Substitute. Skull Base Surg 2014. [DOI: 10.1055/s-0034-1384094] [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: 10/20/2022]
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36
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Zhang J, Yuan WH, Deng K, Deng A, Xu ZT, Qin CB, Lu ZH, Luo J. A long-term frequency stabilized deep ultraviolet laser for Mg+ ions trapping experiments. Rev Sci Instrum 2013; 84:123109. [PMID: 24387422 DOI: 10.1063/1.4847135] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
As many precision laser spectroscopy experiments require frequency stabilized lasers, development of long-term stabilized lasers is of great interest. In this work, we report long-term frequency stabilization of a 280 nm deep ultraviolet laser to a high precision wavemeter with digital servo control such that the long-term drift of the laser frequency was greatly reduced. Long-term laser frequency drift was measured with a fiber frequency comb system over 8 h. After locking, the maximum drift rate of the 280 nm laser was lowered from 576 MHz/h to 6.4 MHz/h. With proper environment control of the wavemeter, the maximum drift rate of the 280 nm laser was further lowered to less than 480 kHz/h. The locked laser system was successfully used in a Mg(+) ions trapping experiment, which was also discussed in this work.
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Affiliation(s)
- J Zhang
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - W H Yuan
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - K Deng
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - A Deng
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z T Xu
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - C B Qin
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z H Lu
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - J Luo
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
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Yang C, Deng K, Peng T, Zan L. Enhanced Solid-Phase Photocatalytic Degradation Activity of a Poly(vinyl chloride)-TiO2 Nanocomposite Film with Bismuth Oxyiodide. Chem Eng Technol 2011. [DOI: 10.1002/ceat.201000450] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Riddell D, Warwick H, Cao Z, Deng K, Chin J, Lou Z, Saraf K, Zhong W, Von Schack D, Wagner E, Stewart W, Aschmies S, Monaghan M, Pangalos M, Reinhart P. P1‐260: Tg2576 mice have defective lipoprotein endocytosis. Alzheimers Dement 2010. [DOI: 10.1016/j.jalz.2010.05.812] [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]
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Deng K, Liu C, Ma R, Sun C, Wang XM, Ma ZT, Sun XL. Clinical evaluation of dual-energy bone removal in CT angiography of the head and neck: comparison with conventional bone-subtraction CT angiography. Clin Radiol 2009; 64:534-41. [DOI: 10.1016/j.crad.2009.01.007] [Citation(s) in RCA: 49] [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: 09/16/2008] [Revised: 01/13/2009] [Accepted: 01/20/2009] [Indexed: 10/21/2022]
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41
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Deng K, Wong C, Nolan J. Carry-over effects of early-life supplementary methionine on lymphoid organs and immune responses in egg-laying strain chickens. Anim Feed Sci Technol 2007. [DOI: 10.1016/j.anifeedsci.2006.05.008] [Citation(s) in RCA: 4] [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: 10/24/2022]
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42
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Deng K, Wong CW, Nolan JV. Carry-over effects of dietary yeast RNA as a source of nucleotides on lymphoid organs and immune responses in Leghorn-type chickens. Br Poult Sci 2006; 46:673-8. [PMID: 16428109 DOI: 10.1080/00071660500395426] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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: 10/25/2022]
Abstract
1. The carry-over effects of supplementing Leghorn-type chickens with yeast RNA as a dietary source of nucleotides for 4 weeks on growth, lymphoid organ weights and immune responses were assessed in a 12-week study. 2. A commercial starter feed supplemented with 0 (control), 5 (LR) or 10 (HR) g yeast RNA/kg was offered to 1-d-old male ISA Brown chicks for 4 weeks, and then all birds were given a commercial pullet grower feed for another 8 weeks. Growth performance, antibody responses to sheep red blood cells (SRBC) and cutaneous reactivity of toe webs to phytohaemagglutinin (PHA)-M were measured at 4-week intervals. 3. Growth rates, feed intake and feed efficiency were not affected by dietary yeast RNA during the supplementary period, but birds previously offered the HR diet grew faster than control birds during weeks 4 to 8.4. LR-fed birds had a higher spleen weight relative to body weight (BW) than control birds at week 4, but this effect was not detected at other times. 5. Serum primary antibody levels against SRBC were not affected by dietary yeast RNA at any time. 6. The toe-web PHA response was significantly higher at week 8 in control birds than in birds previously given the LR diet, although no difference among dietary treatments was observed at other times. 7. It is concluded that the addition of yeast RNA as a source of nucleotides to a commercial diet selectively stimulated the development of the spleen in young birds, but this effect did not persist into a later stage of the bird's life.
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Affiliation(s)
- K Deng
- Animal Science School of Rural Science and Agriculture, University of New England, Armidale, NSW, Australia.
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43
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Deng K, Wong CW, Nolan JV. Long-term effects of early-life dietary L-carnitine on lymphoid organs and immune responses in Leghorn-type chickens. J Anim Physiol Anim Nutr (Berl) 2006; 90:81-6. [PMID: 16422773 DOI: 10.1111/j.1439-0396.2005.00569.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The long-term effects of supplementing Leghorn-type chickens with dietary L-carnitine after hatching for 4 weeks on growth, lymphoid organ weights, humoral and cell-mediated immune responses were assessed in a 12-week study. A commercial starter feed supplemented with 0 (control), 100 (LC) or 1,000 (HC) mg L-carnitine/kg was offered to day-old ISA Brown cockerels for 4 weeks, then all birds were given a commercial pullet grower feed for another 8 weeks. No differences (p > 0.05) in growth rates, feed intake or feed utilisation efficiency existed among the dietary treatments throughout the study. Compared with control birds, HC-fed birds had a lower (p < 0.05) thymus weight relative to bodyweight (BW) at Week 4, but a higher (p < 0.05) relative thymus weight at Week 12. A higher (p < 0.05) serum primary antibody response to sheep red blood cells (SRBC) in HC-fed birds than in the other two groups was also detected at Week 12. Relative spleen or bursa weights and cutaneous responses of toe webs to phytohaemagglutimin (PHA) (an in vivo indicator of cell-mediated immune responses) did not differ (p > 0.05) among dietary treatments at any time. It is concluded that a short-term supply of dietary L-carnitine to a conventional commercial feed after hatching enhanced subsequent humoral immunity in Leghorn-type chickens. Further study is warranted to confirm such a long-term effect.
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Affiliation(s)
- K Deng
- Animal Science, School of Rural Science and Agriculture, University of New England, Armidale, NSW 2351, Australia.
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Deng K, Wong CW, Nolan JV. Long-term effects of early life L-arginine supplementation on growth performance, lymphoid organs and immune responses in Leghorn-type chickens. Br Poult Sci 2005; 46:318-24. [PMID: 16050185 DOI: 10.1080/00071660500127449] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The effects of a short-term dietary arginine supplementation after hatching on subsequent growth and the immune system were assessed in growing male Leghorn-type chickens. An arginine-deficient basal diet (67 g/kg) supplemented with 0 (control), 2.7 (LA) or 5.4 (HA) g L-arginine/kg, was offered ad libitum to 1-d-old male ISA Brown chicks for 4 weeks, then all birds were offered ad libitum a commercial pullet grower feed (8.9 g arginine/kg) for another 8 weeks. Supplemented birds had higher growth rates and feed intake than control birds during the 4-week supplementation period, but these effects did not persist into the subsequent periods. When the supplementation ceased at week 4, no differences in lymphoid organ weights relative to body weight (BW), primary serum antibody levels against sheep red blood cells (SRBC) or cutaneous reactivity of toe webs to phytohaemagglutinin (PHA) were detected. LA-fed birds had lower immunoglobulin (Ig) G levels against bovine serum albumin (BSA) than the control at week 4, but this effect did not persist at weeks 8 and 12. No difference in anti-BSA IgM levels was detected among birds at week 4; at week 12, however, the LA-fed birds had a significantly higher anti-BSA IgM level than the control. An increased anti-SRBC antibody level and a reduced relative bursa weight in HA-fed birds were evident at week 8, without any prior effects. It is concluded that short-term supplementary L-arginine had minimal effects on immunity, but some enhancement of SRBC antibody responses in later stages of growth was observed with previous L-arginine administration.
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Affiliation(s)
- K Deng
- Animal Science, School of Rural Science and Agriculture, University of New England, Armidale, NSW 2351, Australia.
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Knox MR, Deng K, Nolan JV. Nutritional programming of young sheep to improve later-life production and resistance to nematode parasites: a brief review. ACTA ACUST UNITED AC 2003. [DOI: 10.1071/ea03051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Nutritional supplementation, particularly with high quality protein, can increase the resistance and resilience of sheep to infection with gastrointestinal nematode parasites. Nonetheless, this approach to improved nematode parasite control has not been widely adopted, probably because the cost of supplements is usually greater than the immediate production benefits that are conferred. Evidence is presented to support the proposition that long-term effects on liveweight, wool production, reproductive performance and immunity to nematode infection can be programmed through strategic supplementation of sheep during periods of nutritional scarcity. Where optimal efficiency of lifetime production is desired, particular attention should be paid to ensuring that nutritional needs are met and negative impacts of nematode parasitism are minimised during lactation and around the time of weaning.
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46
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Zhou M, Wen L, Deng K. [Determination of annaka injection by an improved double wavelength spectrophotometry]. Hunan Yi Ke Da Xue Xue Bao 2002; 24:207-8. [PMID: 11938795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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47
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Bai H, Zhu P, Deng K. [The MRI diagnosis of aortic dissection]. Hua Xi Yi Ke Da Xue Xue Bao 2001; 32:615-7. [PMID: 12528566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To analyze and address the MRI manifestations and diagnostic importance of aortic dissection. METHODS The MRI manifestations in 31 cases of aortic dissection were analyzed retrospectively. Sixteen cases were proved by operation and pathology. RESULTS MRI depicted an intimal flap and a double lumen in all 31 patients. The site of intimal tear was located in 7 cases. Also demonstrated were the complications: aortic dilation in 15 cases, aortic branches involvement in 5, thrombus formation in the false lumen in 5, aortic regurgitation in 10, left ventricle hypertrophy in 10, and leak into thorax in 2. CONCLUSION As a non-invading imaging method, MRI can demonstrate the site, range and complications of aortic dissection; it is very valuable in the diagnosis of aortic dissection.
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Affiliation(s)
- H Bai
- Department of Radiology, First Affiliated Hospital, WCUMS, Chengdu 610041, China
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Lewis DA, Stevens MK, Latimer JL, Ward CK, Deng K, Blick R, Lumbley SR, Ison CA, Hansen EJ. Characterization of Haemophilus ducreyi cdtA, cdtB, and cdtC mutants in in vitro and in vivo systems. Infect Immun 2001; 69:5626-34. [PMID: 11500438 PMCID: PMC98678 DOI: 10.1128/iai.69.9.5626-5634.2001] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Haemophilus ducreyi expresses a soluble cytolethal distending toxin (CDT) that is encoded by the cdtABC gene cluster and can be detected in culture supernatant fluid by its ability to kill HeLa cells. The cdtA, cdtB, and cdtC genes of H. ducreyi were cloned independently into plasmid vectors, and their encoded proteins expressed singly or in various combinations in an Escherichia coli background. All three gene products had to be expressed in order for E. coli-derived culture supernatant fluids to demonstrate cytotoxicity for HeLa cells. Isogenic H. ducreyi cdtA and cdtB mutants were constructed and used in combination with the wild-type parent strain and a previously described H. ducreyi cdtC mutant (M. K. Stevens, J. L. Latimer, S. R. Lumbley, C. K. Ward, L. D. Cope, T. Lagergard, and E. J. Hansen, Infect. Immun. 67:3900-3908, 1999) to determine the relative contributions of the CdtA, CdtB, and CdtC proteins to CDT activity. Expression of CdtA, CdtB, and CdtC appeared necessary for H. ducreyi-derived culture supernatant fluid to exhibit cytotoxicity for HeLa cells. Whole-cell sonicates and periplasmic extracts from the cdtB and cdtC mutants had no effect on HeLa cells, whereas these same fractions from a cdtA mutant had a very modest cytotoxic effect on these same human cells. CdtA appeared to be primarily associated with the H. ducreyi cell envelope, whereas both CdtB and CdtC were present primarily in the soluble fraction from sonicated cells. Both the cdtA mutant and the cdtB mutant were found to be fully virulent in the temperature-dependent rabbit model for experimental chancroid.
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Affiliation(s)
- D A Lewis
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas 75235-9048, USA
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Noda H, Miyoshi T, Zhang Q, Watanabe K, Deng K, Hoshizaki S. Wolbachia infection shared among planthoppers (Homoptera: Delphacidae) and their endoparasite (Strepsiptera: Elenchidae): a probable case of interspecies transmission. Mol Ecol 2001; 10:2101-6. [PMID: 11555254 DOI: 10.1046/j.0962-1083.2001.01334.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Wolbachia, a group of parasitic bacteria of arthropods, are believed to be horizontally transmitted among arthropod taxa. We present a new probable example of interspecies horizontal transmission of Wolbachia by way of an endoparasite based on the conformity of Wolbachia gene sequences. Field samples of two rice planthoppers, Laodelphax striatellus and Sogatella furcifera possessed identical Wolbachia. Among three major endoparasites of planthoppers, a strepsipteran, Elenchus japonicus, harboured the identical Wolbachia strain, suggesting strepsipteran transmission of Wolbachia from one planthopper to the other. No Wolbachia was detected in a mermithid nematode Agamermis unka, and dryinid wasps possessed different types of Wolbachia.
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Affiliation(s)
- H Noda
- National Institute of Agrobiological Sciences, Owashi, Tsukuba, Ibaraki 305-8634, Japan.
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Deng K, Latimer JL, Lewis DA, Hansen EJ. Investigation of the interaction among the components of the cytolethal distending toxin of Haemophilus ducreyi. Biochem Biophys Res Commun 2001; 285:609-15. [PMID: 11453636 DOI: 10.1006/bbrc.2001.5223] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cytolethal distending toxin (CDT) of Haemophilus ducreyi is encoded by the cdtABC genes, but the composition of active CDT is not known. Both immunoaffinity and metal affinity chromatographic methods were used to purify H. ducreyi CDT from recombinant Escherichia coli strains bearing wild-type or mutated H. ducreyi cdtABC genes. Both affinity-purified preparations contained CdtA, CdtB, and CdtC proteins. These purification efforts also revealed that the formation of a noncovalent CdtB-CdtC complex and production of a fully active CDT complex required the presence of a functional CdtA protein. When purified recombinant CdtB and CdtC proteins were mixed, only very slight CDT activity was detected. In contrast, when a bacterial cell extract containing CdtA was mixed with purified preparations of both CdtB and CdtC, full CDT activity was reconstituted in vitro. These results indicate that CdtA is essential for normal H. ducreyi CDT activity and that CdtA likely modifies or alters either CdtB or CdtC or both to form the active CDT complex.
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Affiliation(s)
- K Deng
- Department of Microbiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
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