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Liang W, Yan X, Shi Y, Chen B, An L, Huang B, He F. Association between graded subchorionic hematoma and adverse pregnancy outcomes in singleton pregnancies: a prospective observational cohort study. Arch Gynecol Obstet 2024; 309:541-549. [PMID: 36821010 PMCID: PMC10808168 DOI: 10.1007/s00404-023-06943-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 01/20/2023] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To investigate whether different grades of subchorionic hematoma (SCH) are involved in the timing of birth and the development of adverse pregnancy outcomes in singleton pregnant women. METHODS A total of 171 women with singleton pregnancies, 72 of whom had SCH before 20 weeks and between 12 and 20 weeks of gestational age (GA), were included in this study conducted between January 2018 and December 2021. These patients were divided into three subgroups based on the size of the subchorionic hematoma on ultrasound imaging. Baseline demographic data, obstetric outcomes, and risk factors for subchorionic hematoma were compared for the two groups. RESULTS A higher number of pregnancies from the SCH group resulted in miscarriage (30.56% versus 2.02%, p < 0.0001), early preterm birth (8.33% versus 1.01%, p = 0.0035), premature rupture of membranes (15.28% versus 4.04%, p = 0.0103), fetal growth restriction (9.72% versus 0%, p = 0.0015), and delivery 13.18 days earlier (274.34 ± 11.25 versus 261.16 ± 29.80, p = 0.0013) than those from the control group. Compared with SCH detected before 12 weeks of GA, the rate of miscarriage increased, and the live birth rate decreased significantly in patients with SCH caught between 12 and 20 weeks of GA. With the increase in hematoma size, the likelihood of miscarriage increased significantly. Further analysis found that delivery occurred earlier in the medium/large SCH group (271.49 ± 23.61 versus 253.28 ± 40.68/261.77 ± 22.11, p = 0.0004/0.0073) but not in the small SCH group (274.34 ± 11.25 versus 267.85 ± 21.01, p = 0.2681) compared to the control group. Our results also showed that the anterior placenta (52.04% versus 33.33%, p = 0.0005, OR = 0.3137, 95% CI [0.1585, 0.601]) is a protective factor for subchorionic hematoma. CONCLUSION Our study shows that women with SCH are at a higher risk of adverse pregnancy outcomes and are independently associated with miscarriage, early preterm birth, premature rupture of membranes, and fetal growth restriction. A subchorionic hematoma, especially detected between 12 and 20 weeks of GA, is very likely to cause miscarriage or preterm birth in women with a medium or large subchorionic hematoma.
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Affiliation(s)
- Weizhang Liang
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xi Yan
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yifu Shi
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Bingjun Chen
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Luwan An
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Bei Huang
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Fang He
- Department of Obstetrics and Gynecology, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
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Wu J, Pang X, Yang X, Zhang M, Chen B, Fan H, Wang H, Yu X, Tang Y, Liang X. M1 macrophages induce PD-L1 hi cell-led collective invasion in HPV-positive head and neck squamous cell carcinoma via TNF-α/CDK4/UPS14. J Immunother Cancer 2023; 11:e007670. [PMID: 38148114 PMCID: PMC10753854 DOI: 10.1136/jitc-2023-007670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2023] [Indexed: 12/28/2023] Open
Abstract
BACKGROUND Although the roles of PD-L1 in promoting tumor escape from immunosurveillance have been extensively addressed, its non-immune effects on tumor cells remain unclear. METHODS The spatial heterogeneity of PD-L1 staining in human papillomavirus (HPV)-positive head and neck squamous cell carcinoma (HNSCC) tissues was identified by immunohistochemistry. Three-dimensional (3D) specific cell-led invasion assay and 3D cancer spheroid model were used to investigate the roles of PD-L1hileader cells in collective invasion. The impact of M1 macrophages on specific PD-L1 expression in leader cells and its mechanisms were further studied. Finally, the effect of combination therapy of anti-PD-L1 and CDK4 inhibitor on HPV-positive tumors were evaluated on a mice model. RESULTS Here, we observed a distinctive marginal pattern of PD-L1 expression in HPV-positive HNSCC tissues. By mimicking this spatial pattern of PD-L1 expression in the 3D invasion assay, we found that PD-L1hi cells led the tumor collective invasion. M1 macrophages induced specific PD-L1 expression in leader cells, and depletion of macrophages in tumor-bearing mice abrogated PD-L1hileader cells and collective invasion. Mechanistically, TNF-α secreted by M1 macrophages markedly increased the abundance of PD-L1 via CDK4/ubiquitin-specific peptidase 14-mediated deubiquitination of PD-L1. We also found that suppression of CDK4 enhanced the efficacy of anti-PD-L1 therapy in an E6/E7 murine model. CONCLUSIONS Our study identified TNF-α/CDK4/ubiquitin-specific peptidase 14-mediated PD-L1 stability as a novel mechanism underlying M1 macrophage-induced PD-L1hileader cells and collective tumor invasion, and highlighted the potential of the combination therapy of anti-PD-L1 and CDK4 inhibitor for HPV-positive HNSCC.
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Affiliation(s)
- Jiashun Wu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu, Sichuan, China
- Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Xin Pang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu, Sichuan, China
| | - Xiao Yang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral Pathology, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Mei Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu, Sichuan, China
| | - Bingjun Chen
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu, Sichuan, China
| | - Huayang Fan
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu, Sichuan, China
| | - Haofan Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu, Sichuan, China
| | - Xianghua Yu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral Pathology, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Yaling Tang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral Pathology, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Xinhua Liang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology (Sichuan University), Chengdu, Sichuan, China
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Yang Y, Mai Z, Chen B, He F. Delayed-interval delivery in twin pregnancies: 12 years' experience in one perinatal center. Int J Gynaecol Obstet 2023; 161:329-330. [PMID: 36333866 DOI: 10.1002/ijgo.14559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 09/20/2022] [Accepted: 10/31/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Yilin Yang
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Zan Mai
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Bingjun Chen
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Guangzhou Medical Centre for Critical Pregnant Women, Guangzhou, China
| | - Fang He
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China.,Guangzhou Medical Centre for Critical Pregnant Women, Guangzhou, China
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Wu PY, Wang T, Chen BJ, Shi MK, Huang B, Wu ND, Qi L, Chang XF, Wang LF, Liu BR, Ren W. [Efficacy and safety of neoadjuvant chemotherapy combined with PD-1 antibody for esophageal squamous cell carcinoma in the real world]. Zhonghua Zhong Liu Za Zhi 2023; 45:170-174. [PMID: 36781239 DOI: 10.3760/cma.j.cn112152-20210806-00586] [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: 02/15/2023]
Abstract
Objective: To evaluate the efficacy and safety of neoadjuvant chemotherapy combined with programmed death-1 (PD-1) antibody in operable, borderline or potentially resectable locally advanced esophageal squamous cell carcinoma(ESCC) in the real world. Methods: The study retrospectively analyzed 28 patients with operable or potentially resectable locally advanced ESCC patients treated with preoperative chemotherapy combined with PD-1 inhibitor in Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School from April 2020 to March 2021. According to the clinical TNM staging system of the 8th edition of the American Joint Committee on Cancer, there were 1, 15, 10, 1 and 1 case of stage Ⅱ, Ⅲ, ⅣA, ⅣB and unknown stage respectively. The treatment was two cycle of dual drug chemotherapy regimen including taxane plus platinum or fluorouracil combined with PD-1 antibody followed by tumor response assessment and surgery if the patient was eligible for resection. Results: Of the 28 patients, 1, 2, 3 and 4 cycles of chemotherapy combined with PD-1 antibody treatment completed in 1, 21, 5, and 1 patient, respectively. Objective response rate (ORR) was 71.4% (20/28), and disease control rate (DCR) was 100% (28/28). The incidence of adverse events exceeding grade 3 levels was 21.4% (6/28), including 3 neutropenia, 1 leukopenia, 1 thrombocytopenia and 1 immune hepatitis. There was no treatment-related death. Of the 23 patients underwent surgery, R0 resection rate was 87.0% (20/23), 13 patients had down staged to the T1-2N0M0 I stage, the pCR rate was 17.3% (4/23), and the pCR rate of primary tumor was 21.7% (5/23). Four patients received definitive chemoradiotherapy. One patient rejected surgery and other treatment after achieved PR response. Conclusion: Neoadjuvant chemotherapy combined PD-1 inhibitor is safe and has high efficacy in operable, borderline or potentially resectable locally advanced ESCC, and it is a promising regimen.
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Affiliation(s)
- P Y Wu
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - T Wang
- Departement of General Thoracic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - B J Chen
- Departement of General Thoracic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - M K Shi
- Departement of General Thoracic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - B Huang
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - N D Wu
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - L Qi
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - X F Chang
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - L F Wang
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - B R Liu
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - W Ren
- The Comprehensive Cancer Center of Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
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Yin W, Chen B, Liu C, Liu Y, Yang Y, Li X, Li R, Xie J, He F. Reducing the risk of gestational diabetes mellitus in chronic hepatitis B virus carriers via more strict control of gestational weight gain. Int J Gynaecol Obstet 2022; 161:903-910. [PMID: 36399400 DOI: 10.1002/ijgo.14583] [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] [Received: 11/02/2021] [Revised: 11/08/2022] [Accepted: 11/12/2022] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To explore the association between gestational weight gain (GWG) and gestational diabetes mellitus (GDM) in hepatitis B surface antigen (HBsAg) -positive women using a retrospective cohort study to provide advice on the management of GWG. METHODS Our study included 39 539 pregnant women who gave birth at the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. Patients were divided into two groups: the HBsAg-negative and HBsAg-positive groups, comprising 36 500 and 3039 participants, respectively. We used univariate and multivariable logistic regression analyses to explore the association between GWG and GDM in maternal hepatitis B virus (HBV) carrier women. RESULTS Being HBsAg positive and excessive GWG were independent risk factors for GDM. Excessive GWG was associated with a higher risk of GDM in HBsAg-positive women. Among pre-pregnancy women of normal weight, HBsAg-positive women with adequate GWG had a higher risk of GDM than HBsAg-negative women, whereas HBsAg-positive women with inadequate GWG had a lower risk of GDM. CONCLUSIONS The optimal GWG ranges for pre-pregnancy normal-weight HBsAg-positive pregnancies might be lower than the US Institute of Medicine recommendations. HBsAg-positive women should strictly control GWG to reduce the risk of GDM.
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Affiliation(s)
- Wanchang Yin
- Department of Obstetrics and Gynecology The Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
- Dongguan Maternal and Child Health Care Hospital Dongguan China
| | - Bingjun Chen
- Department of Obstetrics and Gynecology The Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
- Key Laboratory for Major Obstetric Diseases of Guangdong Province
| | - Chenning Liu
- Dongguan Maternal and Child Health Care Hospital Dongguan China
| | - Yuhui Liu
- Dongguan Maternal and Child Health Care Hospital Dongguan China
| | - Yilin Yang
- Department of Obstetrics and Gynecology The Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
| | - Xiuzi Li
- Department of Obstetrics and Gynecology The Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
| | - Ruirui Li
- Department of Obstetrics and Gynecology The Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
| | - Jiangnan Xie
- Key Laboratory for Major Obstetric Diseases of Guangdong Province
| | - Fang He
- Department of Obstetrics and Gynecology The Third Affiliated Hospital of Guangzhou Medical University Guangzhou China
- Key Laboratory for Major Obstetric Diseases of Guangdong Province
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Yin W, Chen B, Yang Y, Li X, Li R, Xie J, Chen G, He F, Chen D. Association between maternal hepatitis B virus carrier and gestational diabetes mellitus: a retrospective cohort analysis. Virol J 2021; 18:226. [PMID: 34801053 PMCID: PMC8605546 DOI: 10.1186/s12985-021-01691-0] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/01/2021] [Indexed: 12/16/2022] Open
Abstract
INTRODUCTION Given that many pregnant women have chronic hepatitis B virus (HBV) infection and that gestational diabetes mellitus (GDM) is linked to poor maternal and neonatal outcomes, we looked into the relationship between the hepatitis B surface antigen (HBsAg) and GDM to see if a high HBV DNA load is linked to a higher risk of GDM in chronic maternal HBsAg carriers. MATERIALS AND METHODS Our study included 39,539 pregnant women who gave birth at the Third Affiliated Hospital of Guangzhou Medical University in Guangzhou, China, between January 1, 2009, and December 31, 2019. The patients were divided into two groups: HBsAg negative (36,500) and positive (3039). The viral load levels of 1250 HBsAg-positive women who had tested their HBV DNA load during pregnancy were separated into three groups. We utilized univariate and multivariable logistical regression analysis to determine the relationship between maternal chronic HBsAg carrier and GDM. RESULTS Being HBsAg positive was discovered to be an independent risk factor for GDM.Pre-pregnancy Obesity and advanced age were linked to an increased incidence of GDM. Those with a high HBV DNA load (> 106 IU/mL) had a higher risk of GDM than HBsAg-positive women with a low viral load (< 103 IU/mL). Pre-eclampsia and intrahepatic cholestasis of pregnancy (ICP) appeared to be more common in HBsAg-positive women than in uninfected women. CONCLUSIONS Being HBsAg positive, advanced age, and pre-pregnancy obesity were all revealed to be independent risk factors for GDM in our study. In HBsAg carrier, pregnant women, a high HBV DNA burden was linked to a greater risk of GDM. Furthermore, being an HBsAg carrier during pregnancy raised the risk of ICP and pre-eclampsia.
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Affiliation(s)
- Wanchang Yin
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Bingjun Chen
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Yilin Yang
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiuzi Li
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ruirui Li
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiangnan Xie
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Guixian Chen
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Fang He
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. .,Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China.
| | - Dunjin Chen
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. .,Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China.
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Sun MY, Chen BJ, Li H, Wang XP, Qin S, Tang SH. [Analysis of prognosis-related factors in patients with hepatitis B virus-related acute-on-chronic liver failure]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:983-986. [PMID: 34814393 DOI: 10.3760/cma.j.cn501113-20200630-00354] [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] [Indexed: 06/13/2023]
Abstract
Objective: To investigate the prognosis-related factors and its predictive value in patients with hepatitis B virus-related acute-on-chronic liver failure (HBV-ACLF). Methods: Sixty-three cases with HBV-ACLF were enrolled. According to the prognosis of 4-weeks, patients were divided into survival and death group. Univariate and multivariate analyses were performed on the clinical data of the two groups of patients to screen the risk factors affecting prognosis, evaluate its predictive value, and compare them with the MELD score, CTP score, and CLIFACLF score. The data were analyzed using t-test, Mann-Whitney U test, χ (2) test. Multiple logistic regression analysis was used for multiple risk factors. Results: There were 63 cases with HBV-ACLF, with 16 cases (25.40%) in the 4-week survival group, and 47 cases (74.60%) in the death group. The survival group age was 38.38 ± 14.50 years, which was significantly lower than the age of the death group 52.28 ± 12.51 years (P < 0.001). The survival group alpha-fetoprotein (AFP) level was 91.21 (8.38 ~ 154.10)μg/L, which was significantly higher than the level of the death group [12.60 (5.70 ~ 33.80) μg/L, P = 0.039]. The survival group alanine aminotransferase (ALT) level was 925.65 (523.43 ~ 1 364.80) U/L, which was much higher than that of the death group [371.60 (117.30 ~ 895.30) U/L, P = 0.040]. The survival group serum sodium level was (136.59 ± 4.03) mmol /L, which was significantly higher than the level of the death group [(132.22 ± 6.37) mmol/L, P = 0.013]. The survival group ascites severity level was much lower than that of the death group (P = 0.008). The survival group creatinine level was 56.50(49.43 ~ 86.25) μmol/L, which was much lower than the level of the death group [86.20 (68.00 ~ 143.00) μmol/L, P = 0.003]. Multivariate logistic regression analysis showed that ascites (OR = 0.470, 95% CI: 0.226 ~ 0.977) and age (OR = 0.941, 95% CI: 0.888 ~ 0.996) were risk factors affecting the HBV-ACLF prognosis. The area under the curve predicted liver failure prognostic score for ascites and age was 0.821, and the sensitivity and specificity were 68.8% and 87.2%, which was higher than the area under the curve predicted by the MELD score, CTP score, and CLIFACLF score, respectively. Conclusion: Age and ascites can be used to predict the clinical outcome in patients with HBV-ACLF. Younger patients without ascites have a higher survival rate at 4-weeks, but older patients with ascites are more likely to have a lower survival rate.
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Affiliation(s)
- M Y Sun
- College of Medicine, Southwest Jiaotong University, Chengdu 610083, China; Department of Gastroenterology, the General Hospital of Western Theater Command, Chengdu 610083, China
| | - B J Chen
- Department of Gastroenterology, the General Hospital of Western Theater Command, Chengdu 610083, China
| | - H Li
- Department of Gastroenterology, the General Hospital of Western Theater Command, Chengdu 610083, China
| | - X P Wang
- College of Medicine, Southwest Jiaotong University, Chengdu 610083, China; Department of Gastroenterology, the General Hospital of Western Theater Command, Chengdu 610083, China
| | - S Qin
- College of Medicine, Southwest Jiaotong University, Chengdu 610083, China; Department of Gastroenterology, the General Hospital of Western Theater Command, Chengdu 610083, China
| | - S H Tang
- College of Medicine, Southwest Jiaotong University, Chengdu 610083, China; Department of Gastroenterology, the General Hospital of Western Theater Command, Chengdu 610083, China
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Fan HY, Zhu ZL, Xian HC, Wang HF, Chen BJ, Tang YJ, Tang YL, Liang XH. Insight Into the Molecular Mechanism of Podophyllotoxin Derivatives as Anticancer Drugs. Front Cell Dev Biol 2021; 9:709075. [PMID: 34447752 PMCID: PMC8383743 DOI: 10.3389/fcell.2021.709075] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/22/2021] [Indexed: 02/05/2023] Open
Abstract
Podophyllotoxin (PTOX) is a biologically active compound derived from the podophyllum plant, and both it and its derivatives possess excellent antitumor activity. The PTOX derivatives etoposide (VP-16) and teniposide (VM-26) have been approved by the U.S. Food and Drug Administration (FDA) for cancer treatment, but are far from perfect. Hence, numerous PTOX derivatives have been developed to address the major limitations of PTOX, such as systemic toxicity, drug resistance, and low bioavailability. Regarding their anticancer mechanism, extensive studies have revealed that PTOX derivatives can induce cell cycle G2/M arrest and DNA/RNA breaks by targeting tubulin and topoisomerase II, respectively. However, few studies are dedicated to exploring the interactions between PTOX derivatives and downstream cancer-related signaling pathways, which is reasonably important for gaining insight into the role of PTOX. This review provides a comprehensive analysis of the role of PTOX derivatives in the biological behavior of tumors and potential molecular signaling pathways, aiming to help researchers design and develop better PTOX derivatives.
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Affiliation(s)
- Hua-yang Fan
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Zhuo-li Zhu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Hong-chun Xian
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Hao-fan Wang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Bing-jun Chen
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Ya-Jie Tang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Ya-ling Tang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu, China
| | - Xin-hua Liang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology (Sichuan University), Chengdu, China
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Chen BJ, Li J, Wang JD, Cheng YS, Xu YN, Xue M. [Parotid nuclear protein in testis midline carcinoma: a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:510-513. [PMID: 34011009 DOI: 10.3760/cma.j.cn115330-20201103-00853] [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)
- B J Chen
- Department of Head and Neck Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - J Li
- Department of Oral Pathology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - J D Wang
- Department of Head and Neck Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Y S Cheng
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Traditional Chinese Medicine-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200085, China
| | - Y N Xu
- Department of Head and Neck Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - M Xue
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Traditional Chinese Medicine-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200085, China
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Chen BJ, Li YD, Feng CD, Zhang HM, Yan C, Xiao WB. Theoretical studies of the g factors and local structures of the Ni 3+ centers in Na 2 Zn(SO 4 ) 2 ·4H 2 O and K 2 Zn(SO 4 ) 2 ·6H 2 O crystals. Magn Reson Chem 2020; 58:921-928. [PMID: 32391937 DOI: 10.1002/mrc.5039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/01/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023]
Abstract
The local structures and the g factors gi (i = x, y, z) for Ni3+ centers in Na2 Zn(SO4 )2 ·4H2 O (DPPH) and K2 Zn(SO4 )2 ·6H2 O (PHZS) crystals are theoretically studied by using the perturbation formulas of the g factors for a 3d7 ion with low spin (S = 1/2) in orthorhombically compressed octahedra. In these formulas, the contributions to g factors from both the spin-orbit coupling interactions of the central ion and ligands are taken into account, and the required crystal-field parameters are estimated from the superposition model and the local geometry of the systems. Based on the calculations, the Ni-O bonds are found to suffer the axial compression δz (or Δz) of about 0.111 Å (or 0.036 Å) along the z-axis for Ni3+ centers in DPPH (or PHZS) crystals. Meanwhile, the Ni-O bonds may experience additional planar bond length variation δx (≈0.015 Å) along x- and y-axes for the orthorhombic Ni3+ center in DPPH. The theoretical g factors agree well with the experimental data. The obtained local structural parameters for both Ni3+ centers are discussed.
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Affiliation(s)
- B J Chen
- Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang, China
| | - Y D Li
- Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang, China
| | - C D Feng
- Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang, China
- Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang, China
| | - H M Zhang
- Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang, China
- Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang, China
| | - C Yan
- Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang, China
| | - W B Xiao
- Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang, China
- Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang, China
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11
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He F, Yin WC, Chen BJ, Gong JJ, Chen DJ. [Clinical investigation in the methods for complete placenta previa labor induction in the second trimester]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:317-321. [PMID: 32464719 DOI: 10.3760/cma.j.cn112141-20191124-00639] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the appropriate method of labor induction in the second trimester for complete placenta previa patients. Methods: The labor induction outcomes of 85 cases with complete placenta previa in the second trimester were retrospectively analyzed. Twenty patients in group A were treated with cesarean section, 30 patients in group B were treated with ethacridine and mifepristone combined with uterine artery embolization (UAE), and 35 patients in group C were induced by using ethacridine and mifepristone. The clinical features and induction outcomes of three groups were compared. Results: The total duration of labor in group B [(28.7±30.1) hours] was significantly longer than that of group C [(24.3±21.9) hours; P<0.05]. The total amount of blood loss during induction and labor in group B [(302±271) ml] was significantly lower than those of group C [(393±523) ml] and group A [(626±487) ml; P<0.05]. The incidence of fever in group B (13%, 4/30) was significantly higher than those of group C (11%, 4/35) and group A (10%, 2/20; P<0.05). In group C, 13 patients (37%, 13/35) underwent emergency UAE, and 2 patients (6%, 2/35) underwent emergency cesarean section. As to average hemoglobin level and blood transfusion rate, there were no difference among the three groups (all P>0.05). Conclusion: Prophylactic UAE combined with drug induction in patients with complete placenta previa in the second trimester could significantly reduce the amount of bleeding during induction and reduce the risk of emergency procedures.
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Affiliation(s)
- F He
- Department of Obstetrics and Gyneclogy, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou Critical Care Center of Pregnant Women, Guangzhou 510150, China
| | - W C Yin
- Department of Obstetrics and Gyneclogy, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou Critical Care Center of Pregnant Women, Guangzhou 510150, China
| | - B J Chen
- Department of Obstetrics and Gyneclogy, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou Critical Care Center of Pregnant Women, Guangzhou 510150, China
| | - J J Gong
- Department of Obstetrics and Gyneclogy, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou Critical Care Center of Pregnant Women, Guangzhou 510150, China
| | - D J Chen
- Department of Obstetrics and Gyneclogy, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou Critical Care Center of Pregnant Women, Guangzhou 510150, China
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12
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Hung CC, Chen CY, Chen BJ. Colistin and tylosin enhances disaccharidase activities, and improves morphology and permeability of the intestine of broilers. Br Poult Sci 2020; 61:465-470. [PMID: 32216555 DOI: 10.1080/00071668.2020.1747598] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 10/24/2022]
Abstract
1. The present study focused on the potential effects of antibiotics on intestinal digestion and integrity in broilers in terms of disaccharidase activity, electrophysiological properties and morphology. 2. One-day-old Arbour Acres birds were randomly allocated to one of four treatment groups for 42 days; control, colistin (20 mg/kg), tylosin (55 mg/kg) or chlortetracycline (CTC, 55 mg/kg) groups. Colistin and tylosin supplementation, but not CTC supplementation, caused an increase in body weight gain. 3. Colistin and tylosin elevated the activities of maltase and sucrase in the mucosa of the jejunum on d 42. Age caused a gradual decrease in the short-circuit current (Isc) and conductance (Gt) of the ileum, as a measure of permeability. The Isc and Gt of the ileum were higher in the colistin-supplemented broilers than in the control birds on d 42. Tylosin- and CTC-supplemented birds displayed Isc and Gt values similar to those of the control birds. 4. Colistin supplementation increased the villus area in the jejunum and thinned the muscularis mucosae in the ileum compared with the control group. Tylosin supplementation decreased the thickness of the muscularis mucosae and the depth of crypt in the jejunum. CTC thickened the muscularis mucosae in the jejunum and ileum. 5. Colistin and tylosin exhibited a beneficial effect on intestinal digestion and integrity by enhancing disaccharidase activities and improving gut morphology and permeability.
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Affiliation(s)
- C C Hung
- Department of Nutrition, Livestock Research Institute, Council of Agriculture , Tainan City, Taiwan
| | - C Y Chen
- Department of Animal Science and Technology, National Taiwan University ; Taipei, Taiwan
| | - B J Chen
- Department of Animal Science and Technology, National Taiwan University ; Taipei, Taiwan
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13
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Zhou Y, Qi C, Xiao MZ, Cai SL, Chen BJ. RASAL2-RET: a novel RET rearrangement in a patient with high-grade sarcoma of the chest. Ann Oncol 2020; 31:659-661. [PMID: 32220490 DOI: 10.1016/j.annonc.2020.01.073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 12/05/2019] [Accepted: 01/29/2020] [Indexed: 11/19/2022] Open
Affiliation(s)
- Y Zhou
- The Cardio-Thoracic Surgery Department, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - C Qi
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - M Z Xiao
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - S L Cai
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - B J Chen
- The Cardio-Thoracic Surgery Department, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China.
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14
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Li XY, Xu YN, Chen BJ, Wang JD. [The effect and mechanism of 2-methoxyestradiol on human laryngeal papilloma cell line]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:945-950. [PMID: 31623040 DOI: 10.13201/j.issn.1001-1781.2019.10.011] [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] [Received: 04/05/2019] [Indexed: 11/12/2022]
Abstract
Objective:To explore the signal pathway that mediates the effect of 2-methoxyestradiol(2ME2) on human laryngeal papilloma cell line, in terms of cell proliferation and neovascularization. Method:HIF-1α expression of human laryngeal papilloma cell line(Hs840. T) was interfered using siRNA, and the cells were then processed by 2ME2 in two concentrations. RT-PCR and ELISA were performed to detect the difference of HIF-1α in cells with normal or lower HIF-1α mRNA level, with ELISA test of excretory VEGF level and CCK8 test of cell viability. Result:The IC50of 2ME2 in Hs840. T was 0.309 μmol/L in terms of the inhibition effect of cell proliferation(P<0.01). Baseline level of intracellular HIF-1α was detectable, and procession of Hs840. T cells by 2ME2 of 0.4 μmol/L inhibited the transcription and expression of HIF-1α by(76.8±2.0)% and(68.6±3.5)% [vs blank group(100.0±2.7)% and(100.0±6.9)%, P<0.01]. VEGF excretion decreased to(50.8±2.1) and(28.1±4.0)% [vs blank group(100.0±3.1)%, P<0.01]after procession by 2ME2 of 0.2 μmol/L and 0.4 μmol/L. After the successful interference of HIF-1α by siRNA, the inhibition effect on cell proliferation by 2ME2 of 0.4 μmol/L decreased to(51.5±3.8)% [vs control group(65.7±1.7)%, P<0.01]. siRNA interference of HIF-1α lead to a decrease of HIF-α mRNA and protein level to(16.3±0.9)% and(7.4±0.8)% [vs cells not interfered(76.8±2.0)% vs(68.6±3.5)%, P<0.01]. Secretory VEGF dropped to(41.0±2.9)% [vs cells not interfered(28.1±4.0)%, P<0.05]. Conclusion:2ME2 has a significant inhibitory effect on human laryngeal cell line. The inhibition of cell proliferation was mediated by a lower level of HIF-1α and therefore lower VEGF. 2ME2 might serve as a novel potential therapy for patients of recurrent respiratory papillomatosis.
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Affiliation(s)
- X Y Li
- Department of Head and Neck Surgery,Renji Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai,200001,China
| | - Y N Xu
- Department of Head and Neck Surgery,Renji Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai,200001,China
| | - B J Chen
- Department of Head and Neck Surgery,Renji Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai,200001,China
| | - J D Wang
- Department of Head and Neck Surgery,Renji Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai,200001,China
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15
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Han W, Chen BJ, Gu B, Zhao GQ, Yu S, Wang XC, Liu QQ, Deng Z, Li WM, Zhao JF, Cao LP, Peng Y, Shen X, Zhu XH, Yu RC, Maekawa S, Uemura YJ, Jin CQ. Li(Cd,Mn)P: a new cadmium based diluted ferromagnetic semiconductor with independent spin & charge doping. Sci Rep 2019; 9:7490. [PMID: 31097727 PMCID: PMC6522530 DOI: 10.1038/s41598-019-43754-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 12/13/2018] [Indexed: 11/09/2022] Open
Abstract
We report a new diluted ferromagnetic semiconductor Li1+y(Cd,Mn)P, wherein carrier is doped via excess Li while spin is doped by isovalence substitution of Mn2+ into Cd2+. The extended Cd 4d-orbitals lead to more itinerant characters of Li1+y(Cd,Mn)P than that of analogous Li1+y(Zn,Mn)P. A higher Curie temperature of 45 K than that for Li1+y(Zn,Mn)P is obtained in Li1+y(Cd,Mn)P polycrystalline samples by Arrott plot technique. The p-type carriers are determined by Hall effect measurements. The first principle calculations and X-ray diffraction measurements indicate that occupation of excess Li is at Cd sites rather than the interstitial site. Consequently holes are doped by excess Li substitution. More interestingly Li1+y(Cd,Mn)P shows a very low coercive field (<100 Oe) and giant negative magnetoresistance (~80%) in ferromagnetic state that will benefit potential spintronics applications.
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Affiliation(s)
- W Han
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China.,Department of Physics and Electronic Engineering, Hebei Normal University for Nationalities, Chengde, 067000, China
| | - B J Chen
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - B Gu
- Kavli Institute for Theoretical Sciences & CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100190, China.,Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, 319-1195, Japan
| | - G Q Zhao
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - S Yu
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - X C Wang
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Q Q Liu
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Z Deng
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China. .,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China.
| | - W M Li
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - J F Zhao
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - L P Cao
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Y Peng
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.,Department of Materials Science & Engineering, Sichuan University, Chengdu, China
| | - X Shen
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - X H Zhu
- Department of Materials Science & Engineering, Sichuan University, Chengdu, China
| | - R C Yu
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - S Maekawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, 319-1195, Japan
| | - Y J Uemura
- Department of Physics, Columbia University, New York, New York, 10027, USA
| | - C Q Jin
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China. .,School of Physics, University of Chinese Academy of Sciences, Beijing, 100190, China. .,Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China.
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16
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Zeng YS, Qu SW, Wang C, Chen BJ, Chan C. Efficient unidirectional and broadband vertical-emitting optical coupler assisted by aperture-coupled nanopatch antenna array. Opt Express 2019; 27:9941-9954. [PMID: 31045142 DOI: 10.1364/oe.27.009941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 03/11/2019] [Indexed: 06/09/2023]
Abstract
Vertical-emitting optical couplers that convert in-plane guided light to out-of-plane emission are crucial elements for future photonic integrated circuits. However, traditional vertical-coupling elements, such as grating couplers, by default radiate light in both upward and downward directions, leading to a significant reduction of device efficiency. In this paper, we propose to solve this problem using a novel nanopatch antenna array, inspired by patch antenna theories commonly deployed in microwave circuits. The proposed nanopatch array features an up-to-down emission directionality up to 12.91 dBc and a wide operating bandwidth of over 400 nm simultaneously. Compared with a typical waveguide grating antenna, our design shows a significantly higher free-space gain of 24.27 dBi. The unidirectional, efficient, and broadband antenna arrays presented here are promising for a range of integrated photonics applications, including inter-chip photonic interconnects, light ranging and detection, optical communications, and biological imaging.
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17
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Wang Q, Han Y, Chen B, Huang Z, Tamaki S, Murata I, Wang T, Fang K. Cross sections of (n,x) reactions on cerium isotopes induced by D-T neutrons. Appl Radiat Isot 2019; 147:144-151. [PMID: 30878775 DOI: 10.1016/j.apradiso.2019.03.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 03/06/2019] [Accepted: 03/06/2019] [Indexed: 11/26/2022]
Abstract
Neutron induced reaction cross sections of Cerium isotopes (136Ce, 138Ce, 140Ce, 142Ce) were investigated for the (n, 2n), (n, α), (n, p) and (n, γ) reactions in the neutron energy around 14 MeV. Experimental cross sections have been obtained for 136Ce(n, 2n)135m+gCe, 138Ce(n, 2n)137mCe, 140Ce(n, 2n)139m+gCe, 142Ce(n, 2n)141gCe, 140Ce(n, p)140gLa, 142Ce(n, p)142gLa, 140Ce(n, α)137mBa, 142Ce(n, α)139Ba and 142Ce(n, γ)143Ce reactions. The measured values were compared with the literature data as well as the evaluated nuclear data from ENDF/B-VII.1, CENDL-3.1, JENDL-4.0 and the calculated results by Talys-1.8 code.
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Affiliation(s)
- Qiang Wang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Yafei Han
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Bingjun Chen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Zhenglin Huang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Shingo Tamaki
- Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Isao Murata
- Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Tieshan Wang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Kaihong Fang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan.
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Chen B, Jar PYB, Mertiny P, Prybysh R. A Refined One-Slit-Ring Method to Quantify Residual Hoop Stress in Chlorinated Polyvinyl Chloride Pipe-Application to Specimens After Immersion in Primer. POLYM ENG SCI 2019. [DOI: 10.1002/pen.25058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Bingjun Chen
- Department of Mechanical Engineering; University of Alberta; 6-04 National Institute for Nanotechnology, 11421 Saskatchewan Dr NW, Edmonton, T6G 2M9 Alberta Canada
| | - P.-Y. Ben Jar
- Department of Mechanical Engineering; University of Alberta; 10-287 Donadeo Innovation Centre for Engineering, 9211-116 Street NW, Edmonton, T6G 1H9 Alberta Canada
| | - Pierre Mertiny
- Department of Mechanical Engineering; University of Alberta; 10-243 Donadeo Innovation Centre for Engineering, 9211-116 Street NW, Edmonton, T6G 1H9 Alberta Canada
| | - Robert Prybysh
- Donadeo Innovation Centre for Engineering; University of Alberta; 9211-116 Street NW, Edmonton, T6G 1H9 Alberta Canada
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Yang JX, Chen BJ, Pun EYB, Lin H. Praseodymium ion doped K +-Na + thermal ion-exchangeable waveguide-adaptive aluminum germanate glasses. Appl Opt 2018; 57:9022-9031. [PMID: 30461890 DOI: 10.1364/ao.57.009022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 09/25/2018] [Indexed: 06/09/2023]
Abstract
Intense multi-peak red fluorescence and effective near-infrared (NIR) ultra-broadband emission have been observed in Pr3+ doped ion-exchangeable aluminum germanate (NMAG) glasses. The maximum emission cross section for P03→F23 red emission is up to 100.58×10-21 cm2, and the NIR emission corresponding to D21→G41 transition possesses a full-width at half-maximum (FWHM) of 210 nm. Although the obvious cross-relaxation (CR) process at high concentration causes a decrease of the quantum efficiency, the CR broadens the spectral FWHM effectively from another perspective. The admirable red fluorescence trace and the NIR single-mode transmission confirm that Pr3+ doped NMAG glass planar waveguides can support the generation of visible fluorescence and the amplification of infrared signal. For a waveguide channel ion-exchanged in molten KNO3 for 2 h, the single-mode field diameters at 1.55 μm are identified to be 10.4 μm in the horizontal direction and 6.5 μm in the vertical direction, implying an acceptable overlap with a standard single-mode fiber. Effective red fluorescence and broad NIR emission demonstrate that Pr3+ doped NMAG glasses are a promising substrate in developing irradiative luminescence sources and ultra-broadband waveguide amplifiers, especially operating at the entire S-, C-, and L- bands.
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20
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Zhao GQ, Li Z, Sun F, Yuan Z, Chen BJ, Yu S, Peng Y, Deng Z, Wang XC, Jin CQ. Effects of high pressure on the ferromagnetism and in-plane electrical transport of (Ba 0.904K 0.096)(Zn 0.805Mn 0.195) 2As 2 single crystal. J Phys Condens Matter 2018; 30:254001. [PMID: 29741494 DOI: 10.1088/1361-648x/aac367] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Pressure technique is an effective way to modify magnetic properties of diluted magnetic semiconductors (DMS). Based on single crystal, in-plane electrical transport properties of a new generation DMS (Ba0.904K0.096)(Zn0.805Mn0.195)2As2 have been measured with hydrostatic pressure up to 1.8 GPa. Magnetic properties of the single crystal sample are effectively tuned by pressure. Upon compression, the in-plane resistivity initially decreases but then increases when pressure is higher than 1.2 GPa. First principle calculations suggest that decrease of the resistivity is due to enhancement of density of state at Femi energy while increase of the resistivity under higher pressure is caused by distorted MnAs4 tetrahedra. We reveal that the configuration of the MnAs4 tetrahedra and strength of interlayer As-As bonding are of importance to ferromagnetic coupling of (Ba,K)(Zn,Mn)2As2.
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Affiliation(s)
- G Q Zhao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China. School of Physics, University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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Zhang Z, Zhang Q, Chen S, Chen B, Wang Q, Lai C, Fang K. Measurement of cross-sections for 14MeV neutron interaction with 175Lu. Appl Radiat Isot 2018; 132:61-66. [PMID: 29169061 DOI: 10.1016/j.apradiso.2017.11.017] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 11/06/2017] [Accepted: 11/13/2017] [Indexed: 11/16/2022]
Abstract
The cross-sections for 14MeV neutron interaction with 175Lu were precisely measured by the neutron activation and off-line gamma ray technique. The neutron fluence was monitored by the accompanying α-particle of the T(d,n)α reaction, and the neutron energies were determined by using the cross-section ratio method of 90Zr(n,2n)89Zr to 93Nb(n,2n)92mNb reactions. As a result, the cross-sections of 175Lu(n,2n)174mLu, 175Lu(n,2n)174gLu, 175Lu(n,p)175m+gYb and 175Lu(n,α)172Tm reactions have been deduced at En = 14.1 ± 0.3MeV, 14.5 ± 0.3MeV and 14.7 ± 0.3MeV, respectively. Meanwhile, the comparisons between this work and the date reported by other groups previously were also given. For the comparison, it was found that there were nonnegligible discrepancies among these experimental data, as well as for several databases. As a conclusion, present data seem to be more consistent with the database of ENDF/B-VII.1, but trend to be lower than those of JEFF-3.2 and FENDL-3.1b, except the 175Lu(n,2n)174m+gLu reaction which are all in agreement.
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Affiliation(s)
- Zhengwei Zhang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, PR China.
| | - Qian Zhang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Shihong Chen
- Division of Laboratory Management, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Bingjun Chen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Qiang Wang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Caifeng Lai
- Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang, Sichuan Province 621900, PR China
| | - Kaihong Fang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, PR China.
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Zhang W, Chen X, Yan Z, Chen Y, Cui Y, Chen B, Huang C, Zhang W, Yin X, He QY, He F, Wang T. Detergent-Insoluble Proteome Analysis Revealed Aberrantly Aggregated Proteins in Human Preeclampsia Placentas. J Proteome Res 2017; 16:4468-4480. [PMID: 28965414 DOI: 10.1021/acs.jproteome.7b00352] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Preeclampsia (PE) is a placenta disease, featured by hypertension, proteinuria, and other multiorgan dysfunctions, and its etiology is unclear. We and others have shown that intensive endoplasmic reticulum (ER) stress and unfolded protein response (UPR) occur in the PE placenta. In this study, we isolated detergent-insoluble proteins (DIPs) from human placenta tissues, which were enriched with protein aggregates, to characterize the placenta UPR in PE. With data-independent acquisition (DIA) mass spectrometry, we identified 2066 DIPs across all normal (n = 10) and PE (n = 10) placenta samples, among which 110 and 108 DIPs were significantly up- and down-regulated in PE, respectively. Per clustering analysis, differential DIPs could generally distinguish PE from normal placentas. We verified the MS quantitation of endoglin and vimentin by immunoblotting. In addition, we observed that PE placenta tissues have remarkably more endoglin in the cytoplasm. Furthermore, we found that DIPs were evenly distributed across different chromosomes and could be enriched in diversified gene ontology terms, while differential DIPs avoided to distribute on X-chromosome. Significantly up-regulated DIPs in PE were focused on the top functions of lipid metabolism, while 23 of these DIPs could form the top network regulating cellular movement, development, growth, and proliferation. Our results implicate that human PE placentas have disease-relevant differential DIPs, which reflect aberrantly aggregated proteins of placental tissues. The mass spectrometry proteomics data have been deposited to ProteomeXchange consortium with the data set identifier PXD006654, and iProX database (accession number: IPX0000948000).
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Affiliation(s)
- Wanling Zhang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Xing Chen
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Ziqi Yan
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Yang Chen
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Yizhi Cui
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | | | | | | | - Xingfeng Yin
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Qing-Yu He
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | | | - Tong Wang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
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Wang J, Ren LJ, Chen XL, Ma L, Chen BJ, Ran SJ, Lu S. Quick rehabilitation nursing improves the recovery of colon cancer patients after laparoscopy. J BIOL REG HOMEOS AG 2017; 31:1073-1079. [PMID: 29254317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Colon cancer is a common malignant tumor with particularly high morbidity and mortality. The aim of this study was to compare the effect of quick rehabilitation nursing and routine nursing in postoperative recovery of patients with colon cancer after laparoscopic surgery. Two hundred forty patients with colon cancer were classified into four random groups (A, B, C and D, with 60 patients in each group). All patients underwent surgery to remove the colon tumor by laparoscopy under general anesthesia. Patients in groups A and B received quick rehabilitation nursing for post-surgery recovery. In group C patients, local anesthesia associated with quick rehabilitation nursing for post-surgery recovery was used. Group D was used as control group and the patients were treated based on routine nursing. Time to get out of bed, first bowel movement time and the average time of hospitalisation in group A was lower than group D (p less than 0.05), postoperative leukocyte level as well as the occurrence rate of nausea and vomiting, ankylenteron and pelvic adhesion was decreased in group A compared to group D (p less than 0.05), but the postoperative albumin and total protein level was higher than group D (p less than 0.05). The serum level of C-Reactive Protein (CRP) and interleukin 6 (IL-6) in group A was decreased compared to group D several days after surgery (p less than 0.05); group B had 4 cases of intestinal obstruction after surgery that could be cured through conservative treatment, while group D had 10 cases of intestinal obstruction, 8 of which could be cured through conservative treatment and two needed surgery (p less than 0.05); VAS for pain degree of group C in active state was clearly lower at 1h, 5h, 7h, 15h, 30h and 42h after surgery, and side effects of postoperative analgesia were clearly reduced. Time to get out of bed was obviously decreased, while there was no evident effect on postoperative dosage, chronic pain and complications. Adopting quick rehabilitation nursing can effectively reduce occurrence of complications and postoperative pain, speed up the recovery of gastrointestinal function, shorten the length of stay, and improve patients satisfaction.
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Affiliation(s)
- J Wang
- Department of General Surgery, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - L J Ren
- Department of Nuclear Medicine, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - X L Chen
- Department of Nursing, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - L Ma
- Department of Nursing, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - B J Chen
- Department of Nursing, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - S J Ran
- Department of General Surgery, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - S Lu
- Department of General Surgery, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
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Huang S, Yang B, Chen BJ, Bliim N, Ueberham U, Arendt T, Janitz M. The emerging role of circular RNAs in transcriptome regulation. Genomics 2017; 109:401-407. [PMID: 28655641 DOI: 10.1016/j.ygeno.2017.06.005] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/19/2017] [Accepted: 06/22/2017] [Indexed: 01/01/2023]
Abstract
Circular RNAs (circRNAs) are a recently discovered form of RNA that has been found to regulate mammalian transcription. CircRNAs are covalently closed, single-stranded transcripts produced from precursor mRNA. While initially circRNAs were considered to be splicing artefacts, next-generation RNA sequencing of non-polyadenylated transcriptomes has recently shown that the expression of circRNAs is widespread and over 20% of expressed genes in examined cells and tissues can produce these transcripts. Until now thousands of circRNAs have been discovered in organisms ranging from Drosophila melanogaster to Homo sapiens. Functional studies indicate that these transcripts regulate expression of protein-coding linear transcripts and thus comprise an important component of gene expression regulation. Here we provide a comprehensive overview on the biology of circRNAs, including the expression patterns and function. Moreover, we discuss current methodologies for the discovery and validation of circular transcripts. Finally, perspectives on the utilization of circRNA as molecular markers of complex diseases are presented.
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Affiliation(s)
- S Huang
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - B Yang
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - B J Chen
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - N Bliim
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - U Ueberham
- Paul-Flechsig-Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | - T Arendt
- Paul-Flechsig-Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | - M Janitz
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
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Chen BJ, Xie XY, Ni LJ, Dai XL, Lu Y, Wu XQ, Li HY, Yao YD, Huang SY. Factors associated with Staphylococcus aureus nasal carriage and molecular characteristics among the general population at a Medical College Campus in Guangzhou, South China. Ann Clin Microbiol Antimicrob 2017; 16:28. [PMID: 28399856 PMCID: PMC5387264 DOI: 10.1186/s12941-017-0206-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 04/06/2017] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The nasal cavity is the main colonization site of Staphylococcus aureus (S. aureus) in human body. Nasal carriage may be a strong risk factor for some serious infection. There was still limited information about the nasal carriage for S. aureus in south China. METHODS Sought to determine the prevalence and molecular characteristics of S. aureus nasal carriage, 295 volunteers residing on a medicine campus were investigated and sampled the nasal cavity swab. Selected S. aureus isolates were carried through molecular analysis, including pulsed-field gel electrophoresis (PFGE), multilocus sequence analysis, staphylococcal cassette chromosome mec (SCCmec) and virulence gene detection. RESULTS A total of 73 S. aureus isolates were recovered from separate subjects (24.7%, 73/295), with one methicillin-resistant S. aureus (MRSA) isolate (0.3%, 1/295). Among the 73 isolates, 71 isolates were successfully grouped into 13 pulsotypes by PFGE analysis, with profiles A and L the most prevalent; 12 sequence types (STs) were found among the 23 isolates which had similar drug resistant spectrum. ST59, ST188 and ST1 were the most prevalent, accounting for 17.4, 13.0 and 13.0% of all isolates, respectively. The MRSA isolate presented ST8-SCCmec III. 56.5% of isolates carried both the staphylococcal enterotoxin A (sea) and enterotoxin B (seb) genes. 83.6% of the S. aureus isolates were resistant to penicillin, all isolates were susceptible to quinupristin/dalfopristin, levofloxacin, teicoplanin and vancomycin. The most common risk factors for S. aureus carriage were being male, age ≤30 years, and nasal cavity cleaning habits. CONCLUSIONS Colonization by S. aureus was greater among male and young age (20-30 years) students and those with irregularity nasal cleaning. The S. aureus isolates selected were revealed into various sequence types and pulsotypes, indicating molecular heterogeneity among S. aureus isolates from the populations in the medical college in Guangzhou.
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Affiliation(s)
- B J Chen
- Department of Laboratory, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - X Y Xie
- Department of Laboratory, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - L J Ni
- Department of Laboratory, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - X L Dai
- Department of Laboratory, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Y Lu
- Cross Infection Control Office, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, Guangdong, China
| | - X Q Wu
- Department of Laboratory, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - H Y Li
- Department of Laboratory, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Y D Yao
- Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, Guangdong, China.
| | - S Y Huang
- Department of Laboratory, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China.
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Maiques O, Macià A, Moreno S, Barceló C, Santacana M, Vea A, Herreros J, Gatius S, Ortega E, Valls J, Chen BJ, Llobet-Navas D, Matias-Guiu X, Cantí C, Marti RM. Immunohistochemical analysis of T-type calcium channels in acquired melanocytic naevi and melanoma. Br J Dermatol 2017; 176:1247-1258. [PMID: 27718503 DOI: 10.1111/bjd.15121] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Cutaneous malignant melanoma arises from transformed melanocytes de novo or from congenital or acquired melanocytic naevi. We have recently reported that T-type Ca2+ channels (TT-Cs) are upregulated in human melanoma and play an important role in cell proliferation. OBJECTIVES To describe for the first time in formalin-fixed paraffin-embedded tissue the immunoexpression of TT-Cs in biopsies of normal skin, acquired melanocytic naevi and melanoma, in order to evaluate their role in melanomagenesis and/or tumour progression, their utility as prognostic markers and their possible use in targeted therapies. METHODS Tissue samples from normal skin, melanocytic naevi and melanoma were subjected to immunohistochemistry for two TT-Cs (Cav3.1, Cav3.2); markers of proliferation (Ki67), the cell cycle (cyclin D1), hypoxia (Glut1), vascularization (CD31) and autophagy (LC3); BRAF V600E mutation (VE1) and phosphatase and tensin homologue (PTEN). Immunostaining was evaluated by histoscore. In silico analysis was used to assess the prognostic value of TT-C overexpression. RESULTS TT-C immunoexpression increased gradually from normal skin to common naevi, dysplastic naevi and melanoma samples, but with differences in the distribution of both isoforms. Particularly, Cav3.2 expression was significantly higher in metastatic melanoma than in primary melanoma. Statistical correlation showed a linear interaction between PTEN loss/BRAF V600E/Cav3.1/LC3/ Ki67/cyclin D1/Cav3.2/Glut1. Disease-free survival (DFS) and overall survival correlated inversely with overexpression of Cav3.2. DFS also correlated inversely with overexpression of Cav3.1. CONCLUSIONS TT-C immunoexpression on melanocytic neoplasms is consistent with our previous in vitro studies and appears to be related to tumour progression. TT-C upregulation can be considered as a prognostic marker using The Cancer Genome Atlas database. The high expression of Cav3.2 in metastatic melanoma encourages the investigation of the use of TT-C blockers in targeted therapies.
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Affiliation(s)
- O Maiques
- University of Lleida, IRBLleida, Lleida, Spain
| | - A Macià
- University of Lleida, IRBLleida, Lleida, Spain
| | - S Moreno
- Department of Dermatology, Hospital Universitari Arnau de Vilanova; University of Lleida, IRBLleida, Lleida, Spain
| | - C Barceló
- University of Lleida, IRBLleida, Lleida, Spain
| | - M Santacana
- Department of Pathology and Molecular Genetics, Hospital Universitari Arnau de Vilanova; University of Lleida, IRBLleida, Lleida, Spain
| | - A Vea
- Department of Dermatology, Hospital Universitari Arnau de Vilanova; University of Lleida, IRBLleida, Lleida, Spain
| | - J Herreros
- University of Lleida, IRBLleida, Lleida, Spain
| | - S Gatius
- Department of Pathology and Molecular Genetics, Hospital Universitari Arnau de Vilanova; University of Lleida, IRBLleida, Lleida, Spain
| | - E Ortega
- Department of Oncology, Hospital Universitari Arnau de Vilanova; University of Lleida, IRBLleida, Lleida, Spain
| | - J Valls
- Biostatistics Unit, IRBLleida, Lleida, Spain
| | - B J Chen
- New York Genome Center, New York, NY, U.S.A
| | - D Llobet-Navas
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, U.K
| | - X Matias-Guiu
- Department of Pathology and Molecular Genetics, Hospital Universitari Arnau de Vilanova; University of Lleida, IRBLleida, Lleida, Spain
| | - C Cantí
- University of Lleida, IRBLleida, Lleida, Spain
| | - R M Marti
- Department of Dermatology, Hospital Universitari Arnau de Vilanova; University of Lleida, IRBLleida, Lleida, Spain
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He F, He H, Liu W, Lin J, Chen B, Lin Y, Zhao Y, Tao W, Xia X. Neck circumference might predict gestational diabetes mellitus in Han Chinese women: A nested case-control study. J Diabetes Investig 2016; 8:168-173. [PMID: 27589681 PMCID: PMC5334293 DOI: 10.1111/jdi.12574] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 08/21/2016] [Accepted: 08/31/2016] [Indexed: 11/27/2022] Open
Abstract
AIMS/INTRODUCTION A large neck circumference might be an indicator of metabolic syndrome and its components, and for certain patients is more practical as an index than waist circumference. The demarcation value for neck circumference that suggests metabolic syndrome appears to vary by ethnic group. Gestational diabetes mellitus is considered a component of metabolic syndrome in pregnant women. We investigated whether neck circumference in Han Chinese women is associated with gestational diabetes mellitus in early pregnancy, and determined a predictive demarcation value. MATERIALS AND METHODS A nested case-control study was carried out with 255 women aged 18-35 years. Gestational diabetes mellitus was diagnosed according to the criteria of the American Diabetes Association through a 2-h, 75-g oral glucose tolerance test. RESULTS Of the total population, 41 (16%) women developed gestational diabetes mellitus by 24-28 weeks of gestation. Neck circumference at gestational week 16 positively correlated with pre-pregnancy waist circumference, bodyweight and body mass index, and maternal age (P = 0.029) and hemoglobin A1c at gestational week 24 (P ≤ 0.001). By binary logistic regression, neck circumference was an independent predictor of gestational diabetes mellitus (odds ratio 1.840, 95% confidence interval 1.040-3.254; P = 0.036). According to the receiver operating characteristic curve, for predicting gestational diabetes mellitus the optimal demarcation for neck circumference at gestational week 16 was 35.15 cm. CONCLUSIONS Neck circumference is a viable tool to screen for gestational diabetes mellitus. In this population of pregnant Han Chinese women, a neck circumference of ≥35.15 cm was a predictor of gestational diabetes mellitus.
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Affiliation(s)
- Fang He
- Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Hua He
- Institute for Viral Hepatitis, Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education, Chongqing Medical University, Chongqing, China
| | - Wenqi Liu
- Texas A&M University, College Station, Texas, USA
| | - Junyu Lin
- Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Bingjun Chen
- Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yucong Lin
- Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yitao Zhao
- Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wen Tao
- Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xuefeng Xia
- Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China.,Houston Methodist Research Institute, Weill Cornell School of Medicine, Houston, Texas, USA
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Huang YN, Wang J, Chen BJ, Jiang QY, Guo YF, Lan GQ, Jiang HS. Gene expression and enzyme activity of lipoprotein lipase correlate with intramuscular fat content in Guangxi san-huang and Arbor Acres chickens. Genet Mol Res 2016; 15:gmr7414. [PMID: 27323106 DOI: 10.4238/gmr.15027414] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Lipoprotein lipase (LPL) is a key enzyme in lipid metabolism. This study investigated LPL gene expression, LPL enzyme activity, and the correlation of each with intramuscular fat (IMF) in Chinese Guangxi san-huang (GXSH) and Arbor Acres (AA) chickens. The results showed that age and breed had significant effects on LPL expression and enzyme activity. Correlation analyses showed significant positive correlations between LPL expression levels and IMF contents in the breast and thigh tissues of both GXSH (r = 0.712, P = 0.001; r = 0.792, P < 0.001, respectively) and AA (r = 0.644, P < 0.001; r = 0.545, P < 0.001, respectively) chickens. The results also indicated a significant positive correlation between LPL enzyme activity and IMF contents in the breast and thigh tissues of both GXSH (r = 0.615, P = 0.001; r = 0.685, P < 0.001, respectively) and AA (r = 0.600, P = 0.001; r = 0.528, P = 0.003, respectively) chickens. The results indicated that the LPL gene was significantly correlated with IMF in these two breeds. The results presented here could contribute to knowledge of LPL mRNA developmental expression patterns and enzyme activity, and it could facilitate further research on the molecular mechanisms underlying IMF deposition in chickens.
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Affiliation(s)
- Y N Huang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - J Wang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - B J Chen
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Q Y Jiang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Y F Guo
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - G Q Lan
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - H S Jiang
- College of Animal Science and Technology, Guangxi University, Nanning, China
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Huang SY, Pan KY, Liu XQ, Xie XY, Dai XL, Chen BJ, Wu XQ, Li HY. Analysis of the drug-resistant characteristics of Klebsiella pneumoniae isolated from the respiratory tract and CTX-M ESBL genes. Genet Mol Res 2015; 14:12043-8. [PMID: 26505351 DOI: 10.4238/2015.october.5.17] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The main aim of this study was to understand the relationship between the drug-resistant characteristics of Klebsiella pneumoniae and CTX-M-type extended spectrum β-lactamases (ESBLs), and to detect the distributions of CTX-M-type ESBLs in clinically isolated strains. CTX-M ESBL genes isolated from the clinical samples were amplified by polymerase chain reaction and identified by sequence analysis; the antibiotic susceptibility of the samples was determined using the Kirby-Bauer disc-diffusion method. One hundred and five strains among the 246 isolated strains of K. pneumoniae tested positive for ESBL production (42.68%); 92 of these produced CTX-M ESBLs. Of the 92 CTX-M ESBL strains, 81 produced CTX-M-1 ESBLs and 11 produced CTX-M-25 ESBLs. Fifty-seven of the CTX-M-1 ESBL- and six of the CTX-M-25 ESBL-producing bacteria had CTX-M ESBL genes that coexisted in the plasmid and chromosome. The Kirby-Bauer antibiotic susceptibility method revealed that CTX-M ESBL-positive strains showed a higher rate of resistance to cefazolin, cefoxitin, cefuroxime, ceftazidime, cefotaxime, aztreonam, levofloxacin, and cotrimoxazole, compared to the CTX-M ESBL-negative strains (P < 0.05). The CTX-M ESBL genes were commonly observed in the K. pneumoniae isolated from respiratory tract samples; these were significantly associated with the drug-resistant characteristics of K. pneumoniae to β-lactam antibiotics.
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Affiliation(s)
- S Y Huang
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - K Y Pan
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - X Q Liu
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - X Y Xie
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - X L Dai
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - B J Chen
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - X Q Wu
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - H Y Li
- Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
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Sui ZQ, Chen BJ, Pun EYB, Lin H. Infrared radiation properties of Ho³⁺ in multicomponent germanium tellurite glasses. Appl Opt 2015; 54:5976-5982. [PMID: 26193141 DOI: 10.1364/ao.54.005976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ho(3+)-doped and Ho(3+)/Yb(3+)-codoped multicomponent germanium tellurite (MGT) glasses with multifarious emission channels in the near-infrared wavelength region have been fabricated and characterized. Judd-Ofelt intensity parameters of Ho(3+)-doped MGT glasses are solved to be Ω2=5.32×10(-20) cm(2), Ω(4)=2.73×10(-20) cm(2), and Ω(6)=1.12×10(-20) cm(2), indicating a higher asymmetric and stronger covalent environment around Ho(3+) ions in MGT glasses. Efficient infrared fluorescences have been observed in MGT glasses, and spontaneous emission probabilities are derived to be 230.4, 79.9, and 138.3 s(-1) for the (5)I(6)→(5)I(8), ((5)F(4),(5)S(2))→(5)I(5), and (5)I(7)→(5)I(8) radiative transitions, respectively. In Ho(3+)/Yb(3+)-codoped MGT glasses, the maximum stimulated emission cross-section of 2.0 μm emission is calculated to be 4.93×10(-21) cm(2), and the corresponding gain cross-section is derived to be 3.62×10(-21) cm(2) when the excited state population fraction P reaches 0.8. Multifarious infrared emissions show that Ho(3+) in MGT glasses is a good candidate for optical amplifiers and optoelectronic devices.
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Yang J, Chen BJ, Pun EYB, Zhai B, Lin H. Pr3+-doped heavy metal germanium tellurite glasses for irradiative light source in minimally invasive photodynamic therapy surgery. Opt Express 2013; 21:1030-1040. [PMID: 23388997 DOI: 10.1364/oe.21.001030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Pr3+-doped medium-low phonon energy heavy metal germanium tellurite (NZPGT) glasses have been fabricated and the intense multi-peak red fluorescence emissions of Pr3+ are exhibited. Judd-Ofelt parameters Ω2 = 3.14 × 10(-20)cm(2), Ω4 = 10.67 × 10(-20)cm(2) and Ω6 = 3.95 × 10(-20)cm(2) indicate a high asymmetrical and covalent environment in the optical glasses. The spontaneous emission probabilities A(ij) corresponding to the 1D2→3H4, 3P0→3H6, and 3P0→3F2 transitions are derived to be 1859.6, 6270.1 and 17276.3s(-1), respectively, and the relevant stimulated emission cross-sections σ(em) are 5.20 × 10(-21), 14.14 × 10(-21) and 126.77 × 10(-21)cm(2), confirming that the effectiveness of the red luminescence in Pr3+-doped NZPGT glasses. Under the commercial blue LED excitation, the radiant flux and the quantum yield for the red fluorescence of Pr3+ are solved to be 219μW and 11.80%, respectively. 85.24% photons of the fluorescence in the visible region are demonstrated to be located in 600-720nm wavelength range, which matches the excitation band of the most photosensitizers (PS), holding great promise for photodynamic therapy (PDT) treatment and clinical trials.
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Affiliation(s)
- J Yang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
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Tsai PB, Zehnaly A, Chen BJ, Kwan WF. Lower extremity radicular pain after prophylactic intrathecal saline injection through a subarachnoid catheter following accidental dural puncture. Int J Obstet Anesth 2011; 20:262-5. [PMID: 21636264 DOI: 10.1016/j.ijoa.2011.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Revised: 12/16/2010] [Accepted: 03/05/2011] [Indexed: 11/16/2022]
Abstract
We describe a case in which severe lower extremity radicular pain occurred after administration of 0.9% saline into the subarachnoid space through a catheter that had been left for 20 h following inadvertent dural puncture in an obstetric patient. A 42-year-old (G8P7) woman was admitted for repeat cesarean delivery. Accidental dural puncture occurred during epidural placement. Following a slow 10-mL intrathecal injection of 0.9% normal saline an epidural catheter was advanced into the subarachnoid space. Spinal anesthesia was used for cesarean delivery and the subarachnoid catheter was kept in place for 20 h. Before catheter removal, an additional 10 mL of 0.9% saline was slowly administered into the intrathecal space. Almost instantly, the patient complained of back pain that progressed to lower extremity radicular pain and paresthesia; symptoms began to resolve after 10 min. Subsequently, the patient developed a postdural puncture headache that persisted for three days. The patient's radiculitis and paresthesia likely resulted from an acute increase in intrathecal pressure after saline administration or from direct catheter irritation. Although both intrathecal saline administration and subarachnoid catheter placement have been previously proposed as ways to prevent postdural puncture headache, their efficacy remains controversial, and we advise caution with these techniques.
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Affiliation(s)
- P B Tsai
- Department of Anesthesiology, Harbor-UCLA Medical Center, Torrance, California 90509-2910, USA.
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Lu Y, Wang Y, Shen SF, Yan LH, Zhai SJ, Chen BJ, Zhang JF, Zhou SF. Biodegradation of organic compounds from coking wastewater with UASB reactor. Water Sci Technol 2010; 62:1784-1790. [PMID: 20962393 DOI: 10.2166/wst.2010.543] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The UASB reactor was applied for biodegradation of organic compounds in coking wastewater. The influent pH ranged between 6.8 and 7.2, and stirring speed and temperature were controlled at 2 r/min and 30±1°C, respectively. The reactor was successfully started up in 133 days. When the influent COD was 2,600 mg/L (VLR was 2.6 kg/m(3) d), the removal rate of COD was about 54% and the effluent VFA was below 400 mg/L. GC/MS analysis indicated that the coking wastewater mainly contained aniline, phenol, o-phenol, p-cresol, benzoic acid, indole, quinoline etc. Twenty four kinds of organic compounds were detected in the influent, and 20 kinds of organic compounds were completely removed in the UASB reactor. The biodegradation of organic compounds followed Grau second-order kinetics. It was proved to be an effective and feasible method for coking wastewater anaerobic treatment.
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Affiliation(s)
- Y Lu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China.
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Liu R, Chen B, Liang Y, Xu D. [Preparation and application of the monoclonal antibody against okadaic acid]. Wei Sheng Yan Jiu 2008; 37:443-445. [PMID: 18839529] [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: 05/26/2023]
Abstract
An competitive indirect enzyme-linked immunosorbent assay was developed for measurement of okadaic acid (OA), a marine biotoxin associated with red tide. OA was coupled to BSA and OVA by carbodiimide reaction. OA-BSA as immunogen were injected in BALB/c mice. Titres of the antisera against OA were determinated using OA-OVA as coating ligand by ELISA method. The spleen cells of immunized mice were fused with Sp2/O cells. After cloning, four hybridoma cell strains stably produced anti-OA monoclonal antibody were obtained. The monoclonal antibody were produced by the mouse ascites method. The competitive indirect ELISA for okadaic acid in shellfish was established. Under optimal condition, the detection limit of OA was 31.2 ng/ml and the recovery was 87%-112%, with a mean coefficient of variation of 8.1.
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Affiliation(s)
- Renyan Liu
- National Marine Environmental Monitoring Center, Dalian 116023, China.
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Le NT, Chen BJ, Chao NJ. Selective elimination of alloreactivity from immunotherapeutic T cells by photodynamic cell purging and memory T-cell sorting. Cytotherapy 2005; 7:126-33. [PMID: 16040391 DOI: 10.1080/14653240510018163] [Citation(s) in RCA: 12] [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: 10/23/2022]
Abstract
Allogeneic stem cell transplantation (alloSCT), especially in the mismatched setting, carries a high risk of life-threatening GvHD because of activation of donor T cells by Ag present on host cells. Removal of mature donor T cells can prevent GvHD but leads to delayed immune reconstitution, and an increased incidence of opportunistic infections and disease relapse. These findings demonstrate the vital role of donor T cells in providing graft-versus-tumor (GvT) and anti-pathogen effects as well as facilitating immune reconstitution. It has been well documented that GvHD can be separated from GvT effects, making it possible potentially to eliminate GvHD while preserving the immunotherapeutic benefits of donor T cells. Over the past decade, major attempts have been made to reduce GvHD incidence without loss of GvT effect, especially in the haplo-identical setting. Novel techniques to deplete host-reactive donor T cells selectively have been explored. This review focuses on the use of the photodynamic cell purging (PDP) process and of sorting memory T cells for the selective elimination of alloreactivity. Minimizing the threat of GvHD while maximizing the beneficial GvT effect would broaden the scope and effectiveness of alloSCT.
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Affiliation(s)
- N T Le
- Division of Cellular Therapy, Department of Medicine, Duke University Medical Center, 2400 Pratt Street, Suite 1100, Durham, NC 27705, USA
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Abstract
Microbial contamination levels at broiler slaughter plants were investigated at three major slaughter plants in Taiwan during the summer and winter. The microbial contamination levels in chicken carcasses and on food contact surfaces were examined using the swab method. The results indicated that the bacterial counts were affected by the slaughter processing plant, processes, and season (P < 0.05). The bacterial counts on food contact surfaces of the equipment before operation were not significantly lower than those after processing. Regardless of the bacterial type, bacterial counts of chicken carcasses generally decreased from the scalding step to the washing step before evisceration and then increased. The cleaning procedures for food contact surfaces should be evaluated, and special attention should be given to utensils used during processing, such as gloves, baskets, and hand tools.
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Affiliation(s)
- C P Ho
- Food Safety Institute International, Taipei, Taiwan
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Lin JX, Chen BJ, Zhang RX. [Report of a case with albendazole-resistant Strongyloides stercoralis infection]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 18:188. [PMID: 12567709] [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: 02/28/2023]
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Klein AK, Patel DD, Gooding ME, Sempowski GD, Chen BJ, Liu C, Kurtzberg J, Haynes BF, Chao NJ. T-Cell recovery in adults and children following umbilical cord blood transplantation. Biol Blood Marrow Transplant 2002; 7:454-66. [PMID: 11569891 DOI: 10.1016/s1083-8791(01)80013-6] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
T-cell reconstitution following allogeneic stem cell transplantation may involve thymic education of donor-derived precursors or peripheral expansion of mature T cells transferred in the graft. T cell-receptor excision circles (sjTRECs) are generated within the thymus and identify new thymic emigrants and those that have not divided. We measured quantitative and qualitative immunologic reconstitution and sjTREC levels in adult and pediatric recipients of umbilical cord blood transplants (UCBTs). sjTRECs were detected at normal levels in all children, starting 12 months after transplantation. sjTRECs were not detected until 18 months after transplantation in adults, and then only at a 3-fold lower level than expected for age. We used complementarity-determining region 3 (CDR3) spectratyping to measure changes in T cell-receptor diversity occurring with restoration of thymic function. T-cell repertoires were skewed in adults and children at 12 to 18 months after transplantation but recovered to near-normal diversity at 2 to 3 years post-UCBT. T-cell repertoires appeared more diverse earlier in children (at 1 to 2 years post-UCBT) than in adults (at 3 to 4 years post-UCBT). We conclude that early T-cell recovery after UCBT occurs primarily through peripheral expansion of adoptively transferred donor T cells and results in skewing of the T-cell repertoire. The reappearance of sjTREC-containing cells after UCBT is associated with increasing numbers of phenotypicaly naive T cells, improved mitogen and recall antigen responses, and diversification of the T-cell repertoire. The delay in central T-cell recovery in adults relative to children may be due to differences in thymic function resulting from age-related atrophy, graft-versus-host disease, or the pharmacologic effects of prophylaxis and treatment of graft-versus-host disease.
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Affiliation(s)
- A K Klein
- Department of Medicine and the Human Vaccine Institute, Duke University Medical Center, Durham, North Carolina, USA. aklein2@life span.org
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Tangpricha V, Chen BJ, Swan NC, Sweeney AT, de las Morenas A, Safer JD. Twenty-one-gauge needles provide more cellular samples than twenty-five-gauge needles in fine-needle aspiration biopsy of the thyroid but may not provide increased diagnostic accuracy. Thyroid 2001; 11:973-6. [PMID: 11716046 DOI: 10.1089/105072501753211055] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The technique of fine-needle aspiration (FNA) biopsy of the thyroid is important to evaluate malignancy in thyroid nodules. Eighty-five percent of thyroid FNA procedures lead to sufficient cellular material for diagnosis. With more cells aspirated, the chance of sufficiency for diagnosis increases. Large-bore needles lead to more cellular material being aspirated but bloodier specimens that may interfere with cytologic interpretation. Small-bore needles may result in too few cells for diagnosis. We conducted a randomized prospective study contrasting 21-gauge and 25-gauge needles in the evaluation of 50 consecutively enrolled nodules at our institution. In our investigation, 21-gauge needles more frequently provided superior biopsy specimens (50%) than did 25-gauge needles (18%). In the remaining specimens (32%), the 21-gauge and 25-gauge needles provided similar cellular material. The rate of sufficient samples was the same. We conclude that use of 21-gauge needles results in more cellular specimens but may not result in increased diagnostic accuracy.
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Affiliation(s)
- V Tangpricha
- Department of Medicine, Boston University School of Medicine, Massachusetts 02118, USA
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Chai JK, Li LG, Chen BJ. [Repair and reconstruction of massively damaged wounds]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2001; 15:299-302. [PMID: 11761858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To report repair and reconstruction of massively damaged wound under unusual condition. METHODS One hundred and forty-seven patients with deep tissue defects were admitted from January 1993 to December 2000, among them, 96 cases suffered from electrical injury, 18 cases with hot press injury, 18 cases with deep burns as a result of CO poisoning or epileptic seizure, 6 cases caused by chemical producing necrosis and wound infection, 3 cases with radiation injuries, 2 cases with chemical burn, 2 cases with explosive injury, 2 cases with frostbite. One hundred and seventy five wounds in 147 patients were repaired by transfer of local flap, forearm conversal island skin flap, pectoralis major myocutaneous flap, delto-pectoral skin flap, latissimus dorsi skin flap, gastroecnemius myocutaneous flap, anterior and posterior tibial artery island skin flap, and so on. The wound defect ranged from 1 cm x 1 cm to 20 cm x 28 cm, and the flaps were 1.5 cm x 2.0 cm to 22 cm x 30 cm. The necrotic tendon was replaced with acellular allogenic tendon simultaneously in 7 cases. RESULTS One hundred and sixty-nine flaps were survival with first intention, while necrosis of the tip of flap occurred in 6 cases. The transplantation of acellular allogenic tendon in all cases were survival. The function and configuration in 28 cases were satisfactory after 4 months to 8 years follow-up. CONCLUSION Various types of flaps are choosen according to the position, defect range and degree of wound, which is an ideal method to restore the function and to improve patients' living condition.
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Affiliation(s)
- J K Chai
- Burns Institute, 304th Hospital of PLA, Beijing, P. R. China 100037
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Abstract
Triptolide is a diterpenoid triepoxide purified from a Chinese herb Tripterygium Wilfordii Hook F (TWHF). TWHF has been used in traditional Chinese medicine for more than two thousand years. However, its potential value was recognized by the western medicine only after investigators observed the effectiveness of TWHF in the treatment of leprosy and rheumatoid arthritis. Triptolide has been identified as the major component responsible for the immunosuppressive and anti-inflammatory effects of TWHF. Triptolide inhibits both Ca(2+)-dependent and Ca(2+)-independent pathways and affects T cell activation through inhibition of interleukin-2 transcription at a site different from the target of cyclosporin A. Triptolide also has inhibitory effects on a variety of proinflammatory cytokines and mediators and on the expression of adhesion molecules by endothelial cells. Triptolide is effective for the treatment of a variety of autoimmune diseases and in prevention of allograft rejection and graft-versus-host disease in both animals and humans. Moreover, triptolide possesses antitumor and male anti-fertility effect. However, the toxicities of triptolide may be associated with renal, cardiac, hematopoietic and reproductive systems. Currently available data suggest that triptolide is a promising immunosuppressive and anti-inflammatory agent and should be explored further in autoimmune diseases and transplantation.
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Affiliation(s)
- B J Chen
- Bone Marrow Transplantation Program, Duke University Medical Center, Box 3289, 250 Carl Building, Durham, NC 27710, USA.
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Abstract
Understanding the cellular mechanisms that lead to graft-versus-host disease (GVHD) may lead to alternative approaches in the prevention or therapy of this disease process. In this manuscript, we investigated the mechanisms of action of the immunosuppressive drug rapamycin for the prevention of GVHD. GVHD-free long-term survival was achieved in BALB/c (H2d, Mls-2a, Mls-3a) recipients of B10.D2/nSnJ (H-2d, Mls-2a, Mls-3a) bone marrow and spleen cells after a 30-day course of high-dose rapamycin (5 mg/kg per day). Low responses to recipient and third-party cells in a mixed lymphocyte reaction (MLR) were observed as well as decreased mature T-cell numbers in the spleen. This low response was not due to defective interleukin (IL)-2 production, because exogenous IL-2 did not improve the responses in the MLR. However, GVHD-free long-term survival was associated with a large number of infiltrating mononuclear cells in the target organs of GVHD. This observation suggested the possibility that these cells were responsible for suppressing the immune response. Regulatory cells, which could suppress both antirecipient and third-party responses in vitro, were demonstrated to be present in the spleens of these GVHD-free long-term survivors. These results suggest that in addition to impaired cellular immune function, the presence of non-specific regulatory cells (ie, suppression) may contribute to maintenance of GVHD-free long-term survival induced by short-course rapamycin.
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Affiliation(s)
- B J Chen
- Division of Bone Marrow Transplantation, Stanford University Medical Center, California, USA
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Abstract
The purpose of this study was to investigate if carotenoids could alleviate the adverse effects caused by aflatoxin with respect to growth performance and immune response. In two experiments, a total of 320 mule ducklings were assigned to 5 treatments, i.e. control, aflatoxin B(1) (AFB(1)) 200 ppb, AFB(1) +beta-carotene (BC) 200 ppm, AFB(1)+BC 400 ppm, and AFB(1)+astaxanthin (AS) 200 ppm. In experiment 1, the addition of beta-carotene or astaxanthin in the diet containing AFB(1) 200 ppb resulted in a significant decrease in average daily gain as compared with the control. AFB(1) 200 ppb alone and the addition of BC or AS on top of AFB(1) resulted in a significantly lower daily feed intake than for the control group. There were no significant differences in relative organ weights among treatment groups. Both treatments of BC 400 ppm and AS 200 ppm had significantly more macrophages harvested per duck than the control and AFB(1) 200 ppb treatments. However, there were no significant differences among treatments in percentages of phagocytotic macrophages and number of Candida albican phagocytized by phagocytotic macrophages. In experiment 2, blood biochemical parameters and antibody titers were evaluated. There were no significant differences among treatments in total bilirubin content and alkaline phosphatase activity in the serum or in antibody titers against fowl cholera. However, AFB(1) treatment had the highest activities of AST and ALT in the serum. The addition of BC 400 ppm on top of AFB(1) significantly reduced ALT activity as compared with the AFB(1) 200 ppb treatment. These results suggest that carotenoids could provide a slightly toxic alleviating effect on growth performance, enhance the chemotaxis ability of macrophages, and reduce ALT activity elevated by AFB(1).
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Affiliation(s)
- Y H Cheng
- Department of Animal Science, National I-Lan Institute of Technology, I-Lan, Taiwan, PR China
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Chen BJ, Liu C, Cui X, Fidler JM, Chao NJ. Prevention of graft-versus-host disease by a novel immunosuppressant, PG490-88, through inhibition of alloreactive T cell expansion. Transplantation 2000; 70:1442-7. [PMID: 11118087 DOI: 10.1097/00007890-200011270-00008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND PG490-88 is a water soluble, semisynthetic derivative of a novel compound PG490 (triptolide) purified from the Chinese herb Tripterygium Wilfordii Hook F. METHODS PG490-88 was administrated into recipient mice in a model (B10.D2-->BALB/c) of lethal graft-versus-host disease (GVHD) to study the effects of PG490-88 on GVHD and on the various steps involved in the pathological course of GVHD. RESULTS Injection of PG490-88 i.p. at a dose of 0.535 mg/kg/day for the first 3 weeks after transplantation protected all the recipients from developing GVHD up to 100 days after transplantation. PG490-88 inhibited in vivo both CD4+Vbeta3+ and CD8+Vbeta3+ T cell (alloreactive T cells in this model) expansion in the spleen by 64.09 and 34.02%, respectively, at the time when Vbeta3+ cell expansion was in the logarithmic phase (day 3 after transplantation). Intracellular cytokine staining without further in vitro activation demonstrated 47.42% inhibition of IL-2 production among CD4+ spleen cells in PG490-88-treated mice as compared to GVHD control on day 3 after transplantation. In contrast, CD25 (alpha chain of interleukin-2 receptor) expression did not differ. CONCLUSIONS PG490-88 is highly effective in prevention of murine GVHD. The immunosuppressive effect of PG490-88 is mediated by inhibition of alloreactive T cell expansion through interleukin-2 production.
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Affiliation(s)
- B J Chen
- Bone Marrow Transplantation Program, Duke University Medical Center, Durham, NC 27705, USA
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Lee DN, Yen HT, Shen TF, Chen BJ. Chromium-induced glucose uptake, superoxide anion production, and phagocytosis in cultured pulmonary alveolar macrophages of weanling pigs. Biol Trace Elem Res 2000; 77:53-64. [PMID: 11097471 DOI: 10.1385/bter:77:1:53] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 01/25/2000] [Accepted: 02/08/2000] [Indexed: 11/11/2022]
Abstract
The dose-dependent effects of chromium chloride (CrCl3) and chromium picolinate (CrPic) were evaluated for their glucose uptake, superoxide anion (O2-) production, activity of glucose-6-phosphate dehydrogenase, and phagocytosis of incubated pulmonary alveolar macrophages in medium containing no or 5 x 10(-8)M insulin. Glucose uptake was found to increase in cells treated with 20 microg/L CrCl3. Incubation with 20 microg/L of CrPic enhanced glucose uptake and O2- production in an insulin-dependent manner. However, the inclusion of CrPic to 100 microg/L in the medium absent of insulin also increased O2- production. The activity of glucose-6-phosphate dehydrogenase was not affected by either the addition of Cr or insulin. The phagocytosis of Escherichia coli by macrophages was enhanced significantly (p < 0.05) in medium containing 10-100 microg/L CrCl3 or 20-100 microg/L CrPic in the presence of insulin. These results suggest that the addition of 10-20 microg/L CrCl3 enhances directly the cellular activity of macrophages, whereas the effect of CrPic requires the cooperative action of insulin in enhancing their glucose uptake and phagocytosis.
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Affiliation(s)
- D N Lee
- Department of Animal Science, National I-Lan Institute of Technology, Taiwan, Republic of China
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Abstract
Taipei China had been free from foot and mouth disease (FMD) over 68 years before the disease occurred in March 1997. The first suspected case was recorded on a pig farm in the Hsinchu Prefecture on 14 March 1997. Based on clinical signs, gross histopathological findings, and results of enzyme-linked immunosorbent assays and reverse-transcriptase polymerase chain reaction tests, diagnosis of FMD was confirmed by the Taiwan Animal Health Research Institute on 19 March 1997 and was reconfirmed by the FMD World Reference Laboratory in Pirbright (United Kingdom), on 25 March 1997. By the end of July 1997, 6,147 pig farms (about a quarter of the pig farms in Taipei China), were affected. The disease was well under control within two months by means of stamping-out and blanket vaccination. The Government purchased 21 million doses of inactivated oil-adjuvant FMD vaccine, which allowed for two injections per pig and one injection of other cloven-hoofed animals. Before the vaccine was used, the stamping-out policy was implemented, ensuring that all pigs in the affected farms were destroyed. After blanket vaccination, a partial stamping-out policy was adopted, i.e. only pigs showing clinical signs were destroyed.
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Affiliation(s)
- B J Chen
- Animal Industry Department, Council of Agriculture, Taiwan, Taipei, China
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Zhang L, Chen BY, Shan BZ, Yu LM, Chen BJ, Wang YM. Fresh vs aged benzylpenicillin on non-IgE responses in mice. Zhongguo Yao Li Xue Bao 1998; 19:74-6. [PMID: 10375765] [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: 02/12/2023]
Abstract
AIM To study whether or not the freshly prepared benzylpenicillin could induce different non-IgE antibody response from aged benzylpenicillin. METHODS Antibody response was determined by enzyme-linked immunosorbent assay (ELISA). Antigen molecules recognized by antibodies and antigenic cross reactions were tested by hapten inhibition assay. RESULTS Isotypes of specific non-IgE antibodies induced by freshly prepared benzylpenicillin were mainly IgM, and then IgG and IgA. Some parts of specific antibodies recognized benzylpenicillin molecule and major parts combined with degraded or transforming products. Isotypes of antibodies responsible for cross reaction were mainly IgG between benzylpenicillin and ampicillin and IgM between benzylpenicillin and piperacillin. CONCLUSION Freshly prepared and aged benzylpenicillin induced different non-IgE antibody response.
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Affiliation(s)
- L Zhang
- Department of Pharmacology, School of Pharmacy, Shanghai Medical University, China
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Abstract
Polyalkylsulfonated C60, or FC4S, a highly water-soluble caged fullerene derivative, is believed to be a free radical remover or an antioxidant in biological systems. A 50 mg/ml aqueous solution was prepared as a master solution and administered to female Sprague-Dawley CD(Crl:CD(SD)BR) rats in a single-dose acute toxicity study or a 12-day subacute toxicity study where rats were given the solution daily. In a study of the median lethal dose (LD50), no rats died after oral administration, and thus FC4S was considered to be nontoxic if administered orally. In an LD50 intraperitoneal injection study, rats died within 30 hr after injection; the LD50 was determined to be approximately 600 mg per kilogram of body weight. Rats injected with the compound intraperitoneally or intravenously immediately eliminated the compound through the kidney; the kidney appeared to be the primary target organ. The compound induced a distinct lysosome-overload nephrosis, a phagolysosomal nephropathy characterized by a tinctorial difference between the outer cortex and the inner cortex and the medulla. The affected outer cortex showed a diffuse degeneration, with the presence of numerous large vacuoles and cytoplasmic aggregates in the tubular epithelium. The phagolysosomal nephropathy was detected in rats after acute exposure as well as in the surviving rats following 1 intraperitoneal injection of 500 mg/kg or intravenous injection of 100 mg/kg. Ultrastructural investigation revealed numerous membranous conglomerates characteristic of phagolysosomal and/or lysosomal inclusions in the cytoplasm of the renal tubular epithelium. These conglomerates were confined to the vacuole, electron-dense, and unevenly stained. They varied in size and shape and were fused or aggregated. Occasional phagolysosomes were also observed in the endothelial cells of the peritubular plexus. A preliminary study of microsomal enzyme activity analysis revealed a suppression effect of liver cytochrome P-450-dependent monooxygenase activities, including cytochrome P-450, cytochrome b5, and benzo(a)pyrene hydroxylase, but an increased level of kidney cytochrome P-450-dependent monooxygenase activities, including NADPH-cytochrome P-450 reductase. The significance of these enzyme alterations was not well determined. Further study is needed to clarify the correlation between the alterations of microsomal enzyme activity and the nephropathy of lysosomal overload-induced changes. These changes may serve as a biological marker in toxicity screening tests for this class of compound.
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Affiliation(s)
- H H Chen
- National Laboratory Animal Breeding and Research Center, National Science Council, Nankang, Taiwan
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Kwan WF, Lee C, Chen BJ. A noninvasive method in the differential diagnosis of vecuronium-induced and magnesium-induced protracted neuromuscular block in a severely preeclamptic patient. J Clin Anesth 1996; 8:392-7. [PMID: 8832451 DOI: 10.1016/0952-8180(96)00087-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The occurrence of neuromuscular blockade and the resulting potentiation of muscle relaxants during magnesium sulfate (MgSO4) administration is well known. However, a method to differentiate the neuromuscular block induced by magnesium from that induced by curariform nondepolarizing muscle relaxant in the clinical setting has never been reported. We report a case in which the duration of action of 1 mg of vecuronium lasted 4 hours in a patient with severe preeclampsia whose serum magnesium level was in the therapeutic range. We believe this is a remarkable potentiation on record in the literature. We also describe a new, noninvasive method to assess magnesium-induced neuromuscular block when curariform muscle relaxant was given simultaneously.
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Affiliation(s)
- W F Kwan
- Department of Anesthesiology, Harbor-UCLA Medical Center, Torrance 90509, USA
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