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Xu CJ, Yu JT, Yang J, Yang S, Zhou ZK, Wen YB, Shang XP, Wen JG. [Influence of disposable diaper dependence on emotional behavior and related factors of preschool-aged children]. Zhonghua Yi Xue Za Zhi 2023; 103:3770-3775. [PMID: 38092554 DOI: 10.3760/cma.j.cn112137-20230310-00367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Objective: To investigate the influence of disposable diaper dependence (DDD) on emotional behavior and related factors of preschool-aged children. Methods: A total of 3 000 preschool-aged children from 16 kindergartens in Zhengzhou of Henan Province from October 2019 to March 2020 were selected and their parents were investigated by using a basic information questionnaire (including usage of disposable diapers), Strengths and Difficulties Questionnaire (SDQ) and Children's Sleep Questionnaire (PSQ). The differences in baseline and clinical data were compared between the DDD children and normal children, and multiple linear regression models were used to analyze the factors associated with emotional behavior in DDD children. Results: A total of 3 000 questionnaires were distributed and 2 775 (92.50%) were valid. The children ranged in age from 3 to 5 years, including 1 438 boys (51.82%) and 1 337 girls (48.18%). There were 98 (3.53%) children in DDD group and 2 677 (96.47%) children in normal group. The proportion of children living in cities in the DDD group was 58.16%, significantly higher than that of 41.84% in the normal children group (P<0.001). The abnormal detection rate of various factors in SDQ in DDD children, from high to low, were hyperactivity (n=14, 14.29%), peer communication problems (n=12, 12.24%), prosocial behavior (n=11, 11.22%), emotional symptoms (n=10, 10.20%) and conduct problems (n=7, 7.14%). The detection rates of abnormal total difficulty scores in DDD group and normal children were 7.14% (7 cases) and 0.78% (21 cases), respectively, with statistically significant differences (P<0.001). The proportions of emotional symptoms and hyperactivity disorder in DDD group were higher than those in normal group, and the differences were statistically significant (P<0.05). The PSQ score of children in DDD group was 3.01±2.02 which was not significantly different from the PSQ score of the normal group (2.71±2.10, P=0.157). The multi-factor analysis showed that caregiver's education level (β=-1.135,95%CI:-1.910 to -0.359), urinary incontinence (β=2.222, 95%CI: 1.105-3.339), fecal incontinence (β=3.833, 95%CI: 2.691-4.975), urinary and fecal incontinence (β=5.522, 95%CI: 4.145-6.899), and recurrent urinary tract infections(β=3.523,95%CI: 1.798-5.248)were the independent influencing factors of emotional behavioral problems in DDD children (P<0.05). Conclusions: Children with DDD are more likely to have emotional behavioral problems than normal children. Caregiver's education level, urinary incontinence and recurrent urinary tract infections were influencing factors of emotional behavioral problems in DDD children.
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Affiliation(s)
- C J Xu
- Department of Breast Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - J T Yu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Henan Joint International Paediatric Urodynamic Laboratory, Zhengzhou 450052, China
| | - J Yang
- Department of Out-patient, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - S Yang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Henan Joint International Paediatric Urodynamic Laboratory, Zhengzhou 450052, China
| | - Z K Zhou
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Henan Joint International Paediatric Urodynamic Laboratory, Zhengzhou 450052, China
| | - Y B Wen
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Henan Joint International Paediatric Urodynamic Laboratory, Zhengzhou 450052, China
| | - X P Shang
- Department of Medical Record Management, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - J G Wen
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Henan Joint International Paediatric Urodynamic Laboratory, Zhengzhou 450052, China
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Gu Q, Chen SF, Chen KL, Huang YY, Ge JJ, Zuo CT, Cui M, Dong Q, Yu JT. [The clinical application value of brain 18F-FDG PET/CT in the diagnostics of Parkinsonian syndromes]. Zhonghua Yi Xue Za Zhi 2023; 103:3294-3300. [PMID: 37926574 DOI: 10.3760/cma.j.cn112137-20230707-01181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Objective: To analyze the PET/CT imaging features of fluoride 18F-fluorodeoxyglucose (18F-FDG) in patients with various types of Parkinson's syndrome (PS), and to establish a "diagnostic tree" model of 18F-FDG PET/CT for PS. Methods: Data of patients with Parkinson's disease (PD), patients with multiple system atrophy cerebellar type (MSA-C), and patients with multiple system atrophy Parkinson's type (MSA-P)admitted to the Neurology Department of Huashan Hospital affiliated to Fudan University from January 2019 to December 2021. 18F-FDG PET/CT examination was conducted in all patients. Clinical and follow-up data was collected to determine clinical diagnosis. The specific patterns of brain glucose metabolism in patients with various types of Parkinsonism were observed and their utility in the differential diagnosis of the disease was analyzed. 18F-FDG PET/CT imaging"diagnostic tree"model was established and its value in the differential diagnosis of Parkinsonism was verified. Results: A total of 320 patients, 187 males and 133 females, aged (62±9) years, were enrolled in our study, including 80 PD, 90 PSP, 114 MSA-C and 36 MSA-P patients. The differential diagnostic features of cerebral glucose metabolism of Parkinsonism were as follows: the metabolism of putamen increased in PD patients, the metabolism of caudate nucleus, thalamus, midbrain, and frontal lobe decreased in PSP patients, the metabolism of cerebellum decreased in MSA-C patients, and the metabolism of putamen and cerebellum decreased in MSA-P patients. The sensitivity and specificity of the"diagnostic tree"model are 88.75% and 91.25% for PD diagnosis, 54.44% and 96.96% for PSP diagnosis, 87.72% and 86.41% for MSA-C diagnosis, and 55.56% and 91.55% for MSA-P diagnosis, respectively. It could correctly classify 75%(240/320) of patients. Conclusions: Characteristic metabolism patterns of brain in 18F-FDG PET/CT imaging is significant for the differential diagnosis of PD, PSP, MSA-C and MSA-P. The"diagnostic tree"model is valuable for clinical diagnosis.
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Affiliation(s)
- Q Gu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - S F Chen
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - K L Chen
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Y Y Huang
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - J J Ge
- Positron Emission Tomography Center, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - C T Zuo
- Positron Emission Tomography Center, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - M Cui
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Q Dong
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - J T Yu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
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Li XL, Yu YQ, Qiu LH, Yang D, Wang XM, Yu JT. [Effects of Porphyromonas endodontalis lipopolysaccharides on the expression of matrix metalloproteinase-9 in mouse osteoblasts]. Zhonghua Kou Qiang Yi Xue Za Zhi 2019; 52:499-503. [PMID: 28835032 DOI: 10.3760/cma.j.issn.1002-0098.2017.08.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Objective: To evaluate the effects of lipopolysaccharides (LPS) extracted from Porphyromonas endodontalis (Pe) on the expression of matrix metalloproteinase-9 (MMP-9) mRNA and protein as well as enzyme activity in MC3T3-E1 cells and the role of nuclear factor-κB (NF-κB) in the process, so as to investigate the expression of MMP-9 dependent signaling pathways in mouse osteoblasts induced by Pe LPS. Methods: The experiment was conducted in 3 sessions: MC3T3-E1 cells were treated with various concentrations of Pe LPS (0-20 mg/L) and 10 mg/L Pe LPS for different time intervals (0-48 h). The expression of MMP-9 mRNA and protein were detected by real-time reverse transcription-PCR (RT-PCR) and enzyme-linked immunosorbent assay (ELISA), while the enzyme activity was detected by gelatin zymography method. The expression of MMP-9 mRNA was also detected in 10 mg/L Pe LPS treated MC3T3-El cells after pretreated with specific NF-κB inhibitor BAY 11-7082 for l h. Statistical analysis was performed using one-way ANOVA and Dunnett t test with SPSS 13.0 software package. Results: The levels of MMP-9 mRNA and protein increased significantly after the treatment with various concentrations of Pe LPS (0-20 mg/L), which indicated that Pe LPS induced osteoblasts to express MMP-9 in dose dependent manners. The expression of MMP-9 protein increased from (5 395±362) ng/L (blank control group) to (12 684±375) ng/L (20 mg/L group). Maximal induction of MMP-9 mRNA expression was found in the MC3T3-E1 cells treated with 10 mg/L Pe LPS for 24 h. The expression of MMP-9 mRNA in the 20 mg/L group was about 7 times than that in the blank control group. After 24 h, the expression of MMP-9 mRNA decreased. Maximal expression of MMP-9 protein was found in the MC3T3-E1 cells treated with 10 mg/L Pe LPS for 48 h ([35 055±2 346] ng/L) showing the highest enzyme activity. The mRNA of MMP-9 decreased significantly after pretreatment with 10 µmol/L BAY 11-7082 for 1 h. Conclusions: Pe LPS might induce the expression of MMP-9 in MC3T3-E1 cells through the signaling of NF-κB.
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Affiliation(s)
- X L Li
- Department of Endodontics, School of Stomatology, China Medical University & Liaoning Institute of Dental Research, Shenyang 110002, China
| | - Y Q Yu
- Department of Endodontics, School of Stomatology, China Medical University & Liaoning Institute of Dental Research, Shenyang 110002, China
| | - L H Qiu
- Department of Endodontics, School of Stomatology, China Medical University & Liaoning Institute of Dental Research, Shenyang 110002, China
| | - D Yang
- Department of Endodontics, School of Stomatology, China Medical University & Liaoning Institute of Dental Research, Shenyang 110002, China
| | - X M Wang
- Department of Endodontics, School of Stomatology, China Medical University & Liaoning Institute of Dental Research, Shenyang 110002, China
| | - J T Yu
- Department of Endodontics, School of Stomatology, China Medical University & Liaoning Institute of Dental Research, Shenyang 110002, China
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Yu JT, Chen HW, Xue X. P4806Difference of efficacy and safety of left atrial appendage closure using watchman between patients aged less than 75 to more than 75 years. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4806] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J T Yu
- Helmut-G.-Walther Klinikum, Cardiology, Lichtenfels, Germany
| | - H W Chen
- The First Affiliated Hospital of University of Science and Technology of China, Cardiology, Hefei, China People's Republic of
| | - X Xue
- the Second Hospital of Jilin University, Cardiology Department, Changchun, China People's Republic of
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Yu JT, Xue X, Jiang LS, Duenninger E, Muenzel M, Guan SF, Fazakas A, Cheng FZ, Illnitzky J, Keil T. P4807Impact of chronic kidney disease on Watchman implantation: experience with 300 consecutive left atrial appendage closures at a single center. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4807] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J T Yu
- Helmut-G.-Walther-Klinikum, Cardiology Department, Lichtenfels, Germany
| | - X Xue
- the Second Hospital of Jilin University, Cardiology Department, Changchun, China People's Republic of
| | - L S Jiang
- Renji Hospital of Shanghai Jiao Tong University School of Medicine, Cardiology Department, Shanghai, China People's Republic of
| | - E Duenninger
- Helmut-G.-Walther-Klinikum, Cardiology Department, Lichtenfels, Germany
| | - M Muenzel
- Helmut-G.-Walther-Klinikum, Cardiology Department, Lichtenfels, Germany
| | - S F Guan
- Shanghai Chest Hospital, Cardiology Department, Shanghai, China People's Republic of
| | - A Fazakas
- Helmut-G.-Walther-Klinikum, Cardiology Department, Lichtenfels, Germany
| | - F Z Cheng
- Luohu People's Hospital, Cardiology Department, Shenzhen, China People's Republic of
| | - J Illnitzky
- Helmut-G.-Walther-Klinikum, Cardiology Department, Lichtenfels, Germany
| | - T Keil
- Helmut-G.-Walther-Klinikum, Cardiology Department, Lichtenfels, Germany
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Cheng L, Yao Y, Yu JT, Wang L, Han JB, Sun HY, Deng YK, Liu Z. [Minutes of the 2016 China Rhinology Annual Meeting]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:232-235. [PMID: 28395499 DOI: 10.3760/cma.j.issn.1673-0860.2017.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- L Cheng
- Department of Otorhinolaryngology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China; International Centre for Allergy Research, Nanjing Medical University, Nanjing 210029, China; the Institute of Allergy and Autoimmune Disease, Jiangsu Clinical Medicine Research Institution, Nanjing 210029, China
| | - Y Yao
- Department of Otorhinolaryngology Head and Neck Surgery of Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - J T Yu
- Department of Otorhinolaryngology Head and Neck Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - L Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Renmin Hospital, Wuhan Uinversity, Wuhan 430060, China
| | - J B Han
- Department of Otorhinolaryngology Head and Neck Surgery, Renmin Hospital, Wuhan Uinversity, Wuhan 430060, China
| | - H Y Sun
- Department of Otorhinolaryngology Head and Neck Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Y K Deng
- Department of Otorhinolaryngology Head and Neck Surgery of Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Z Liu
- Department of Otorhinolaryngology Head and Neck Surgery of Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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Yu JT, Meng HX, Liu KN. [An modified culture method of primary human gingival epithelial cells]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:733-737. [PMID: 29263523] [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: 06/07/2023]
Abstract
OBJECTIVE To establish a stable primary culture method of human gingival epithelial cells, with a higher successful rate and shorter culture time. METHODS Nine patients who received "crown-lengthening surgery" with relatively healthy periodontal conditions were selected (n=9). Gingival samples were collected from the 9 donors during gingivectomy. Gingival epithelial cells were isolated and cultured by both an advanced enzyme digestion method and a tissue explant method. In the advanced enzyme digestion culture process, 2.5 g/L DispaseIIwas used to separate the epithelial tissue part from the connective tissue part, which lasted for one night. Then the epithelial tissues were digested by 0.025% trypsin without EDTA for 10 minutes, and centrifuged by keeping the digested epithelial tissues that remained. This advanced method not only decreased the concentration and digesting time of the two above-mentioned enzymes, but also simplified the centrifugel process. The tissue explant method was not changed too much compared with the original method. Growing processes of the primary cells cultured by the two methods were observed and recorded respectively, and indirect immunocytochemical staining was used to identify the type of cultured cells. At the same time, successful rates and cell culture time were also compared between the two methods. RESULTS Human gingival epithelial cells with typical morphology could be cultured within a shorter period by the advanced enzyme digestion method with a successful rate of 88.9%, and proliferated rapidly as sheets. After 10-14 d cells could be passaged, gradually turned to be like fibroblasts when passaged to the third generation, and eventually went to apoptosis. The primary culture time was longer by using the tissue explant method, and approximately after 17-22 d cells could be passaged, although the successful rate was the same as the enzyme digestion method. Cytokeratin staining was both positive by indirect immunocytochemical staining of cells. CONCLUSION Primary human gingival epithelial cells cultured by the advanced enzyme digestion method could grow faster and be passaged to the second generation successfully, which could supply a stable origin for cellular experiments.
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Affiliation(s)
- J T Yu
- Department of Periodontology, Department of General Dentistry, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - H X Meng
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - K N Liu
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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Yu JT, Meng HX, Liu KN. [An modified culture method of primary human gingival epithelial cells]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:733-737. [PMID: 27538162] [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: 06/06/2023]
Abstract
OBJECTIVE To establish a stable primary culture method of human gingival epithelial cells, with a higher successful rate and shorter culture time. METHODS Nine patients who received "crown-lengthening surgery" with relatively healthy periodontal conditions were selected (n=9). Gingival samples were collected from the 9 donors during gingivectomy. Gingival epithelial cells were isolated and cultured by both an advanced enzyme digestion method and a tissue explant method. In the advanced enzyme digestion culture process, 2.5 g/L DispaseIIwas used to separate the epithelial tissue part from the connective tissue part, which lasted for one night. Then the epithelial tissues were digested by 0.025% trypsin without EDTA for 10 minutes, and centrifuged by keeping the digested epithelial tissues that remained. This advanced method not only decreased the concentration and digesting time of the two above-mentioned enzymes, but also simplified the centrifugel process. The tissue explant method was not changed too much compared with the original method. Growing processes of the primary cells cultured by the two methods were observed and recorded respectively, and indirect immunocytochemical staining was used to identify the type of cultured cells. At the same time, successful rates and cell culture time were also compared between the two methods. RESULTS Human gingival epithelial cells with typical morphology could be cultured within a shorter period by the advanced enzyme digestion method with a successful rate of 88.9%, and proliferated rapidly as sheets. After 10-14 d cells could be passaged, gradually turned to be like fibroblasts when passaged to the third generation, and eventually went to apoptosis. The primary culture time was longer by using the tissue explant method, and approximately after 17-22 d cells could be passaged, although the successful rate was the same as the enzyme digestion method. Cytokeratin staining was both positive by indirect immunocytochemical staining of cells. CONCLUSION Primary human gingival epithelial cells cultured by the advanced enzyme digestion method could grow faster and be passaged to the second generation successfully, which could supply a stable origin for cellular experiments.
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Affiliation(s)
- J T Yu
- Department of Periodontology, Department of General Dentistry, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - H X Meng
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - K N Liu
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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Jia HB, Ma JX, Ma XL, Yu JT, Feng R, Xu LY, Wang J, Xing D, Zhu SW, Wang Y. Estrogen alone or in combination with parathyroid hormone can decrease vertebral MEF2 and sclerostin expression and increase vertebral bone mass in ovariectomized rats. Osteoporos Int 2014; 25:2743-54. [PMID: 25074352 DOI: 10.1007/s00198-014-2818-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 07/22/2014] [Indexed: 12/28/2022]
Abstract
UNLABELLED The study is about the regulatory effects of estrogen and parathyroid hormone (PTH) on sclerostin, a protein that inhibits the Wnt/β-catenin pathway. The results indicate that estrogen may down-regulate sclerostin expression and that estrogen displays synergistic action with PTH. These results provide a new perspective on the relationship between estrogen and bone. PURPOSE To investigate whether estrogen can down-regulate SOST and MEF2 (myocyte enhancer factor 2) expression and whether co-treatment with estrogen and PTH has a stronger effect on suppressing SOST than PTH applied alone in ovariectomized rats. METHODS Forty-three-month-old virgin female Sprague-Dawley (SD) rats were ovariectomized and divided into four groups (n = 10). Another ten age-matched rats received sham operations as controls. After allowing 8 weeks for the development of vertebral osteopenia, the rats were administered the drug intervention. For this intervention, the estrogen group was subcutaneously injected with 17β-estradiol at 25 μg/kg body weight, the PTH group was injected with 80 μg/kg synthetic human PTH (1-34), and the co-treatment group was concurrently treated with PTH and estrogen at the above dosage. The OVX group and sham group were treated with vehicle. The drug treatment was conducted for 12 weeks. After the lumbar spine bone mineral density (BMD) was measured, the rats were sacrificed, and the lumbar spine and blood were collected for qPCR, Western blot, immunohistochemistry and other tests. RESULTS Estrogen can down-regulate MEF2 and sclerostin expression, and co-treatment with estrogen and PTH has a stronger effect on suppressing MEF2 and SOST mRNA than PTH alone. The co-treatment group displayed slightly higher bone mass and biomechanical properties than the PTH group, but the differences were not significant. CONCLUSIONS Estrogen appears to be a regulator of sclerostin, and the effect may involve suppressing MEF2s. Combined treatment with PTH and estrogen is not more beneficial for vertebral bone mass and strength than treatment with PTH alone in ovariectomized rats.
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Affiliation(s)
- H B Jia
- Tianjin Medical University General Hospital, 154, Anshan Street, Heping District, Tianjin, 300052, China
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Xu JN, Yang YG, Gong Y, Yang SL, Yu JT. [The bottleneck steps limiting maturation of penicillin G acylase in Escherichia coli]. Sheng Wu Gong Cheng Xue Bao 2001; 17:570-4. [PMID: 11797224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
We have identified the bottleneck steps limiting maturation of penicillin G acylase (PAC) through comparison of the maturation performance for various PAC-expression systems (Pac, Tac, T7, Vgb + T7) with different efficiencies of proteolysis, subunit folding and assembly. The maturation of PAC could be limited by various steps, such as translocation, periplasmic proteolysis, subunit folding and assembly depending on the host/vector systems. In BL21(pPA6) cells, maturation of PAC were limited by proteolysis and folding steps; the efficiency of proteolysis was 57.2%; the subunit folding and assembly capacity was 0.72. In BL21(pKKpacSP) cells, the stability and folding of alpha subunit was bottleneck steps. In T7 and dissolved-oxygen regulation expression systems, PAC proprecursor could be maturated efficiently. Results also indicate that the folding of alpha peptide plays a key role in folding of precursor for PAC in E. coli. Developing proper host/vector systems and fermentation technology with superior abilities on subunit folding and assembly of precursor for PAC could be plausible for enhancing production of PAC. In this study, pac could be expressed (transcribed, translated and maturated) efficiently under the control of T7 promoter.
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Affiliation(s)
- J N Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
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Abstract
Mutations that lead to anchorage-independent survival are a hallmark of tumor cells. Adhesion of integrin receptors to extracellular matrix activates a survival signaling pathway in epithelial cells where Akt phosphorylates and blocks the activity of proapoptotic proteins such as the BCL2 family member Bad, the forkhead transcription factor FKHRL-1, and caspase 9. Insulin-like growth factor 1 (IGF-1) is a well-established epithelial cell survival factor that also triggers activation of Akt and can maintain Akt activity after cells lose matrix contact. It is not until IGF-1 expression diminishes (~16 h after loss of matrix contact) that epithelial cells deprived of matrix contact undergo apoptosis. This suggests that IGF-1 expression is linked to cell adhesion and that it is the loss of IGF-1 which dictates the onset of apoptosis after cells lose matrix contact. Here, we examine the linkage between cell adhesion and IGF-1 expression. While IGF-1 is able to maintain Akt activity and phosphorylation of proapoptotic proteins in cells that have lost matrix contact, Akt is not able to phosphorylate and inactivate another of its substrates, glycogen synthase kinase 3beta (GSK-3beta), under these conditions. The reason for this appears to be a rapid translocation of active Akt away from GSK-3beta when cells lose matrix contact. One target of GSK-3beta is cyclin D, which is turned over in response to this phosphorylation. Therefore, cyclin D is rapidly lost when cells are deprived of matrix contact, leading to a loss of cyclin-dependent kinase 4 activity and accumulation of hypophosphorylated, active Rb. This facilitates assembly of a repressor complex containing histone deacetylase (HDAC), Rb, and E2F that blocks transcription of the gene for IGF-1, leading to loss of Akt activity, accumulation of active proapoptotic proteins, and apoptosis. This feedback loop containing GSK-3beta, cyclin D, HDAC-Rb-E2F, and IGF-1 then determines how long Akt will remain active after cells lose matrix contact, and thus it serves to regulate the onset of apoptosis in such cells.
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Affiliation(s)
- J T Yu
- Division of Molecular Oncology, Departments of Medicine and Cell Biology, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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Zhou YJ, Tan WS, Zhao J, Hua P, Sun XM, Yu JT. [On-line measurement of oxygen uptake rate in the cultivation of Vero cells using the dynamic method]. Sheng Wu Gong Cheng Xue Bao 2000; 16:525-7. [PMID: 11051834] [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: 02/18/2023]
Abstract
The oxygen uptake rate(OUR) during the cultivation of Vero cells in 1.5 L CelliGen bioreactor was on-line determined using the dynamic method. The results showed that the cell growth and metabolic state during the exponential growth phase was lineally related to the OUR. This implies that the on-line measurement of OUR can be used to promptly monitor the physiological state of cultured cells and to efficiently avoid contamination because of frequent sampling in the large-scale cultivation of mammalian cells.
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Affiliation(s)
- Y J Zhou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai
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Du P, Ye Q, Yu JT. [Cultivation integrated with acetate acid filtration on Escherichia coli]. Sheng Wu Gong Cheng Xue Bao 2000; 16:528-30. [PMID: 11051835] [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: 02/18/2023]
Abstract
A fed-batch fermentation integrated with filtration process was proceeded in a synthetic medium with the use of a hollow-fibre membrane filter. The activity of alpha A interferon reached 1.4 x 10(9) u/L, which was increased 320% over that of a control process. The integrated process was then proceeded in the synthetic medium supplemented with yeast extract during the earlier stage. The addition of yeast extract not only reduced the accumulation of acetate, but also promoted the production of alpha A interferon. The maximum activity achieved 1.9 x 10(9) u/L during the fermentation, which was increased 480% over that of a normal process.
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Affiliation(s)
- P Du
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai
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Zhao J, Tan WS, Zhou Y, Zhou L, Yu JT. [Application of intermittent-feeding of growth-limiting nutrients in suspension culture of insect cells(Sf21)]. Sheng Wu Gong Cheng Xue Bao 2000; 16:357-62. [PMID: 11059281] [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: 02/18/2023]
Abstract
On the basis of the growth and metabolism behavior inherent in suspended Sf21 insect cells, the intermittent feeding of growth-limiting nutrients(glucose and protein hydrolysates) was employed in the regulation of cellular growth during the cultivation by using the residual glucose concentration as a reference point. It was shown that as compared with the batch cultivation, the intermittent-feeding of growth-limiting nutrients effectively prolonged the growth and stationary phase for Sf21 insect cells grown in two representative culture medium(TC-100 and IPL-41). The maximum cell density was increased from 3.0 x 10(6) cells/ml to 6.5 x 10(6) cells/mL in TC-100 medium, and in IPL-41 medium, the maximum cell density was increased from 7.05 x 10(6) cells/mL to 9.0 x 10(6) cells/mL. As the defined nutrient solution was used for feeding in lieu of the complicated and expensive base medium, the technique would find prospects in large scale high-density cultivation of insect cells.
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Affiliation(s)
- J Zhao
- State Key Laboratory of Bioreactor Engineering, ECUST, Shanghai
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Wei DZ, Wang XL, Chen SX, Yu JT. [Study on continuous synthesis of galacto-oligosaccharide by immobilized Bacillus stearothermophilus]. Sheng Wu Gong Cheng Xue Bao 2000; 16:392-5. [PMID: 11059288] [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: 02/18/2023]
Abstract
The galacto-oligosaccharide was synthesized continuously by immobilized Bacillus stearothermophilu producing beta-galactosidase in fibrous bed reactor. The effect of substrate concentration, pH, reaction temperature and retention time on production of GOS was investigated. The optimal reaction conditions were determined. Substrate concentration were 450 g/L; Reaction temperature was 55 degrees C; pH was 7.0; Residence time was 100 min. The product yield reached up to 50.7%. GOS synthesis was promoted by feeding 1.5% D-glactose after 24 h. The immobilized cell reactor can work stably for 120 h.
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Affiliation(s)
- D Z Wei
- State Key Laboratory of Bioreactor Engineering, East China University of Science & Technology, Shanghai
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Abstract
Eukaryotic cells have an internal cytoskeletal scaffolding, giving them their distinctive shapes. The cytoskeleton enables cells to transport vesicles, undergo changes in shape, migrate and contract. This dynamic structure is formed by three classes of filamentous assembly: actin microfilaments, intermediate filaments and microtubules. In this investigation the cytoskeleton of cultured human myometrial cells was studied by immunohistochemistry using specific antibodies against vinculin, cytokeratin, vimentin, tubulin and RhoA, covalently labelled with a fluorescent tag. Polymerized actin was visualized with fluorescein-conjugated phalloidin. Myometrial cells were very rich in actin fibres, which generally appeared as parallel bundles along the longest axis of the cells. There was a strong expression of vinculin which concentrated at actin--vinculin focal adhesion sites. By contrast, intermediate filaments (vimentin and cytokeratin) were organized in a dense cytoplasmic meshwork which excluded the nuclear space. A similar pattern was observed for tubulin. RhoA had a diffuse distribution and was associated with actin fibres. Exposure of the cells to oxytocin provoked a 10% shortening of actin stress fibres. These results demonstrate that myometrial smooth muscle cells have a rich cytoskeletal structure and that agonists that stimulate myometrial activation provoke measurable changes in actin fibres which may be important for efficient contractility.
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Affiliation(s)
- J T Yu
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, John Radcliffe Hospital, Headington, UK
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Yu JT, Huang YS. Electron paramagnetic resonance of a molecular defect in gamma -irradiated IrO2 single crystals. Phys Rev B Condens Matter 1989; 40:4281-4288. [PMID: 9992415 DOI: 10.1103/physrevb.40.4281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yu JT, Tsai SF, Chen RH. Detection of twinning in KNaSO4 crystals by electron paramagnetic resonance and by x-ray diffraction. Phys Rev B Condens Matter 1988; 38:11147-11155. [PMID: 9945988 DOI: 10.1103/physrevb.38.11147] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Yu JT, Sheu JF. Observation of positional disorder in LiNaSO4 crystals by the electron spin resonance of the SO4- free radicals. Phys Rev B Condens Matter 1988; 37:5663-5669. [PMID: 9943762 DOI: 10.1103/physrevb.37.5663] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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