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Liu LP, Wu XP, Cai TP, Wang L, Sun J, Liang JY, Ma SP, Gan X, Ruan NH, Ge SF. [Analysis of efficacy and factors influencing sequential combination therapy with tenofovir alafenamide fumarate after treatment with entecavir in chronic hepatitis B patients with low-level viremia]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:118-125. [PMID: 37137825 DOI: 10.3760/cma.j.cn501113-20221019-00507] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Objective: To observe the efficacy and factors influencing sequential or combined tenofovir alafenamide fumarate (TAF) after treatment with entecavir (ETV) in patients with chronic hepatitis B (CHB) with low-level viremia (LLV). Methods: 126 CHB cases treated with ETV antiviral therapy in the Department of Infectious Diseases of the First Affiliated Hospital of Nanchang University from January 2020-September 2022 were retrospectively collected. Patients were divided into a complete virologic response (CVR) group (n = 84) and a low-level viremia (LLV) group (n = 42) according to the HBV DNA level during treatment. Clinical characteristics and laboratory indicators of the two groups at baseline and 48 weeks were analyzed by univariate analysis. Patients in the LLV group were divided into three groups according to their continued antiviral treatment regimen until 96 weeks: continued use of ETV as a control group; replacement of TAF as a sequential group; and combination of ETV and TAF as a combined group. The data of the three groups of patients were analyzed by one-way analysis of variance for 48 weeks. HBV DNA negative conversion rate, HBeAg negative conversion rate, alanine aminotransferase (ALT), creatinine (Cr), and liver stiffness test (LSM) were compared among the three groups after 96 weeks of antiviral treatment. Multivariate logistic regression was used to analyze the independent factors influencing the occurrence of HBV DNA non-negative conversion in LLV patients at 96 weeks. Receiver operating characteristic curve (ROC) was used to evaluate the effectiveness of predicting the occurrence of HBV DNA non-negative conversion in LLV patients at 96 weeks. Kaplan-Meier was used to analyze the cumulative negative rate of DNA in LLV patients, and the Log-Rank test was used for comparison. HBV DNA and HBV DNA negative conversion rates during treatment were observed dynamically. Results: Univariate analysis showed statistically significant differences in age, BMI, HBeAg positivity rate, HBV DNA, HBsAg, ALT, AST, and LSM at baseline between the CVR group and the LLV group (P < 0.05). Univariate analysis of variance revealed no statistically significant difference among the three groups of LLV patients at 48 weeks (P > 0.05). HBV-DNA negative conversion rate in the sequential group and the combination group was significantly higher than that in the control group after 96 weeks of treatment (88.89% vs. 41.18%, 85.71% vs. 41.18%, χ (2) = 10.404, P = 0.006). HBeAg negative conversion rate was higher than that of the control group, with no statistically significant difference (P > 0.05).Compared with the control group, ALT, Cr, and LSM in the sequential group and the combined group were equally improved to varying degrees, with a statistically significant difference (P < 0.05). Subsequent use of ETV and HBV DNA at 48 weeks were independent risk factors for HBV DNA positivity at 96 weeks in LLV patients (P < 0.05). The AUC of HBV DNA at 48 weeks was 0.735 (95%CI: 0.578 ~ 0.891), the cut-off value was 2.63 log(10) IU/ml, and the sensitivity and specificity were 76.90% and 72.40%, respectively. DNA conversion rate was significantly lower in LLV patients receiving 48-week ETV and 48-week HBV DNA≥2.63 log10 IU/mL than in patients receiving sequential or combined TAF and 48-week HBV DNA < 2.63 log(10) IU/mL. HBV DNA negative conversion rates in the sequential group and combined group at 72 weeks, 84 weeks, and 96 weeks were higher than those in the control group during the period from 48 weeks to 96 weeks of continuous treatment, and the differences were statistically significant (P < 0.05). Conclusion: Sequential or combined TAF antiviral therapy could more effectively improve the 96-week CVR rate, as well as hepatic and renal function, and alleviate the degree of hepatic fibrosis in CHB patients with LLV following ETV treatment. Subsequent use of ETV and HBV DNA load at 48 weeks were independent predictors of HBV DNA positivity at 96 weeks in LLV patients.
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Affiliation(s)
- L P Liu
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - X P Wu
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - T P Cai
- Information Office of the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - L Wang
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - J Sun
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - J Y Liang
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - S P Ma
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - X Gan
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - N H Ruan
- Medical College of Nanchang University, Nanchang 330031, China
| | - S F Ge
- Department of Infectious Diseases, First Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Li J, Huang J, Zhang R, Lin Y, Chen Q, Gan X. Pretreatment with propofol restores intestinal epithelial cells integrity disrupted by mast cell degranulation in vitro. Physiol Res 2022. [DOI: 10.33549/physiolres.934933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Propofol has been shown to against intestinal reperfusion injury when treated either before or after ischemia, during which mast cell could be activated. The aim of this study was to evaluate the role of propofol in restoring the intestinal epithelial cells integrity disrupted by mast cell activation or the released tryptase after activation in vitro. We investigated the effect of: (1) tryptase on Caco-2 monolayers in the presence of PAR-2 inhibitor or propofol, (2) mast cell degranulation in a Caco-2/LAD-2 co-culture model in the presence of propofol, and (3) propofol on mast cell degranulation. Epithelial integrity was detected using transepithelial resistance (TER) and permeability to fluorescein isothiocyanate (FITC)-dextran (the apparent permeability coefficient, Papp). The expression of junctional proteins zonula occludens-1 (ZO-1/TJP1) and occludin were determined using western blot analysis and immunofluorescence microscopy. The intracellular levels of reactive oxidative species (ROS) and Ca2+ were measured using flow cytometry. Tryptase directly enhanced intestinal barrier permeability as demonstrated by significant reductions in TER, ZO-1, and occludin protein expression and concomitant increases in Papp. The intestinal barrier integrity was restored by PAR-2 inhibitor but not by propofol. Meanwhile, mast cell degranulation resulted in epithelial integrity disruption in the Caco-2/LAD-2 co-culture model, which was dramatically attenuated by propofol. Mast cell degranulation caused significant increases in intracellular ROS and Ca2+ levels, which were blocked by propofol and NAC. Propofol pretreatment can inhibit mast cell activation via ROS/Ca2+ and restore the intestinal barrier integrity induced by mast cell activation, instead of by tryptase.
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Affiliation(s)
| | | | | | | | | | - X Gan
- Department of Anesthesiology, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University.
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Liu C, Meng Q, Zu C, Li R, Yang S, He P, Li H, Zhang YY, Zhou C, Liu M, Ye Z, Wu Q, Zhang YJ, Gan X, Qin X. U-shaped association between dietary thiamine intake and new-onset diabetes: a nationwide cohort study. QJM 2022; 115:822-829. [PMID: 35894803 PMCID: PMC9744247 DOI: 10.1093/qjmed/hcac159] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/25/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND The association between dietary thiamine intake and the risk of diabetes remains unknown. AIM We aimed to evaluate the relation of dietary thiamine intake with new-onset diabetes and examine possible effect modifiers. DESIGN Prospective cohort study. METHODS A total of 16 272 participants who were free of diabetes at baseline were enrolled from China Health and Nutrition Survey (CHNS). Dietary nutrients intake information was collected by 3-day dietary recalls in addition to using a 3-day food-weighed method to assess cooking oil and condiment consumption. New-onset diabetes was defined as a fasting blood glucose ≥7.0 mmol/l or a glycated haemoglobin (HbA1c) ≥6.5% (48 mmol/mol) or diagnosed by a physician during the follow-up. RESULTS During a median follow-up duration of 9.0 years, new-onset diabetes occurred in 1101 participants. Overall, the association between dietary thiamine intake and new-onset diabetes followed a U-shape (P for non-linearity <0.001). Consistently, when thiamine intake was assessed as quartiles, compared with those in the 2-3 quartiles (0.75 to 1.10 mg/day), the significantly higher risks of new-onset diabetes were found in participants in the first quartile [adjusted hazard ratio (HR), 1.33; 95% confidence interval (CI): 1.10, 1.61] and the fourth quartile (adjusted HR, 1.39; 95% CI: 1.17, 1.67). Similar results were found when further adjusting for the intake of other major nutrients or food groups; or using the propensity score weighting to control the imbalance of covariates. CONCLUSION Our results suggested that there was a U-shape association between dietary thiamine intake and new-onset diabetes in general Chinese adults, with a minimal risk at 0.75-1.10 mg/day.
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Affiliation(s)
- C Liu
- From the Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
- Institute of Biomedicine, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
| | - Q Meng
- From the Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
- Institute of Biomedicine, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
| | - C Zu
- From the Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
- Institute of Biomedicine, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
| | - R Li
- From the Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
- Institute of Biomedicine, Anhui Medical University, No.81 Meishan Road, Shushan District, Hefei 230032, China
| | - S Yang
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - P He
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - H Li
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - Y Y Zhang
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - C Zhou
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - M Liu
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - Z Ye
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - Q Wu
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - Y J Zhang
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - X Gan
- Division of Nephrology, Nanfang Hospital, Southern Medical University, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- National Clinical Research Center for Kidney Disease, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, No.1838, North of Guangzhou Avenue, Baiyun District, Guangzhou, 510515, China
- Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, No.1838, North of Guangzhou Avenue, Guangzhou, Baiyun District, 510515, China
| | - X Qin
- Address correspondence to X. Qin, Institute of Biomedicine, Anhui Medical University, Hefei 230032, China; Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
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Gan X, Guo M, Chen Z, Li Y, Shen F, Feng J, Cai W, Xu B. Development and validation of a three-immune-related gene signature prognostic risk model in papillary thyroid carcinoma. J Endocrinol Invest 2021; 44:2153-2163. [PMID: 33620716 DOI: 10.1007/s40618-021-01514-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 01/19/2021] [Indexed: 01/25/2023]
Abstract
PURPOSE Increasing evidence indicates that there is a correlation between papillary thyroid carcinoma (PTC) prognosis and the immune signature. Our goal was to construct a new prognostic tool based on immune genes to achieve more accurate prognosis predictions and earlier diagnoses of PTC. METHODS The 493 PTCs samples and 58 tumor-adjacent normal tissues were obtained from The Cancer Genome Atlas database (TCGA). Immune genes were obtained from the ImmPort database. First, this cohort was randomly divided into training cohort and testing cohort. Second, the differentially expressed (DE) immune genes from the training set were used to construct the prognostic model. Then, the testing and entire data cohorts were used to validate the model, and the data were analyzed to determine the correlation of the clinical prognostic model with immune cell infiltration and expression profiles of human leukocyte antigen (HLA) genes. Finally, an analysis of the gene ontology (GO) annotation was performed. RESULTS A total of 189 upregulated and 128 downregulated DE immune genes were identified. We developed and validated a three-immune gene model for PTC that includes Hsp70, NOX5, and FGF23. This model was demonstrated to be an independent prognostic variable. In addition, the overall immune activity of the high-risk group was higher than that of the low-risk group. CONCLUSIONS We developed and validated a three-immune gene model for PTC that includes HSPA1A, NOX5, and FGF23. This model can be used as a validated tool to predict outcomes in PTC.
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Affiliation(s)
- X Gan
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
- Department of Thyroid Surgery, School of Medicine, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - M Guo
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Z Chen
- Department of Thyroid Surgery, School of Medicine, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Y Li
- Department of Thyroid Surgery, School of Medicine, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - F Shen
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
- Department of Thyroid Surgery, School of Medicine, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - J Feng
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
- Department of Thyroid Surgery, School of Medicine, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - W Cai
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
- Department of Thyroid Surgery, School of Medicine, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - B Xu
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China.
- Department of Thyroid Surgery, School of Medicine, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China.
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Patten JJ, Keiser PT, Gysi D, Menichetti G, Mori H, Donahue CJ, Gan X, Do Valle I, Geoghegan-Barek K, Anantpadma M, Berrigan JL, Jalloh S, Ayazika T, Wagner F, Zitnik M, Ayehunie S, Anderson D, Loscalzo J, Gummuluru S, Namchuk MN, Barabasi AL, Davey RA. Multidose evaluation of 6,710 drug repurposing library identifies potent SARS-CoV-2 infection inhibitors In Vitro and In Vivo. bioRxiv 2021. [PMID: 33907750 DOI: 10.1101/2021.04.20.440626] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The SARS-CoV-2 pandemic has caused widespread illness, loss of life, and socioeconomic disruption that is unlikely to resolve until vaccines are widely adopted, and effective therapeutic treatments become established. Here, a well curated and annotated library of 6710 clinical and preclinical molecules, covering diverse chemical scaffolds and known host targets was evaluated for inhibition of SARS-CoV-2 infection in multiple infection models. Multi-concentration, high-content immunocytofluorescence-based screening identified 172 strongly active small molecules, including 52 with submicromolar potencies. The active molecules were extensively triaged by in vitro mechanistic assays, including human primary cell models of infection and the most promising, obatoclax, was tested for in vivo efficacy. Structural and mechanistic classification of compounds revealed known and novel chemotypes and potential host targets involved in each step of the virus replication cycle including BET proteins, microtubule function, mTOR, ER kinases, protein synthesis and ion channel function. In the mouse disease model obatoclax effectively reduced lung virus load by 10-fold. Overall, this work provides an important, publicly accessible, foundation for development of novel treatments for COVID-19, establishes human primary cell-based pharmacological models for evaluation of therapeutics and identifies new insights into SARS-CoV-2 infection mechanisms. Significance A bioinformatically rich library of pharmacologically active small molecules with diverse chemical scaffolds and including known host targets were used to identify hundreds of SARS-CoV-2 replication inhibitors using in vitro, ex vivo, and in vivo models. Extending our previous work, unbiased screening demonstrated a propensity for compounds targeting host proteins that interact with virus proteins. Representatives from multiple chemical classes revealed differences in cell susceptibility, suggesting distinct dependencies on host factors and one, Obatoclax, showed 90% reduction of lung virus loads in the mouse disease model. Our findings and integrated analytical approaches will have important implications for future drug screening and how therapies are developed against SARS-CoV-2 and other viruses.
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Gan X, Feng J, Deng X, Shen F, Lu J, Liu Q, Cai W, Chen Z, Guo M, Xu B. The significance of Hashimoto's thyroiditis for postoperative complications of thyroid surgery: a systematic review and meta-analysis. Ann R Coll Surg Engl 2021; 103:223-230. [PMID: 33645288 DOI: 10.1308/rcsann.2020.7013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Hashimoto's thyroiditis (HT) is one of the most common immune-mediated diseases. It makes thyroid surgery more complicated and difficult because there may be adhesions between the thyroid gland and surrounding structures. However, it is still controversial whether HT patients carry a high risk for postoperative complications of thyroid surgery. The purpose of this study was to investigate the significance of HT for the postoperative complications of thyroid surgery. METHODS A search for studies assessing the postoperative complication risks of HT patients compared with that of patients with benign nodules (BNs) was performed in PubMed, EMBASE and Web of Science. Nine studies (20,118 cases, 1,582 cases of HT and 18,536 cases of BN) were identified, and the data from the relevant outcomes were extracted and analysed. RESULTS There were no significant differences between the HT group and BN group in recurrent laryngeal nerve palsy (RLNP) and permanent hypoparathyroidism (PHP). The rate of transient hypocalcaemia (THC) was significantly higher in the HT group (16.85%) than in the BN group (13.20%). CONCLUSIONS The meta-analysis showed that HT only increased the risk of the postoperative complication THC compared to BN. Understanding the significance of HT in postoperative hypoparathyroidism after thyroid surgery would help clinicians perform sufficient preoperative (and postoperative) assessments and to optimise surgical planning.
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Affiliation(s)
- X Gan
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - J Feng
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - X Deng
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - F Shen
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - J Lu
- Department of Colorectal and Anal Surgery, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Q Liu
- Department of Oncology, Guangzhou First People's Hospital, the Second Affiliated Hospital of South China University of Technology, Guangzhou, China
| | - W Cai
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Z Chen
- Department of Thyroid Surgery, Guangzhou First People's Hospital, the Second Affiliated Hospital of South China University of Technology, Guangzhou, China
| | - M Guo
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - B Xu
- Department of Thyroid Surgery, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China
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Wei R, Han C, Deng D, Ye F, Gan X, Liu H, Li L, Xu H, Wei S. Research progress into the physiological changes in metabolic pathways in waterfowl with hepatic steatosis. Br Poult Sci 2020; 62:118-124. [DOI: 10.1080/00071668.2020.1812527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- R. Wei
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - C. Han
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - D. Deng
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - F. Ye
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - X. Gan
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - H. Liu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - L. Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - H. Xu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, P.R. China
| | - S. Wei
- College of Life Science, Sichuan Agricultural University, Ya’an, Sichuan, P.R. China
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Romano L, Feng J, Peltier S, Boccara D, Bagot M, Gan X, Liu G, Bensussan A, Michel L. 664 Biological activities of traditional medicinal herbs on skin cells. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sun W, Gan X, Hu J, Li L, Wang J. CYP17 gene plays a key role in goose genital growth by influencing the testosterone level at puberty. Poult Sci 2018; 97:1748-1756. [PMID: 29462369 DOI: 10.3382/ps/pey009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 01/20/2018] [Indexed: 11/20/2022] Open
Abstract
All birds reproduce by internal fertilization, but only 3% of birds have external genitalia. Hormone secretions and body size influence genital growth, but the actual regulatory mechanism is rarely reported. Thus, using 35 geese as experimental material, the regulatory mechanism of goose external genitalia growth was explored by measuring body size parameters, serum hormone concentrations, and related gene expression. In this study, genital growth was different among tested geese, but histological and morphological results showed that all geese external genitalia contained complete tissues. Measurements of hormone levels showed that at puberty, as the genital length increased, irregular decreases were observed in the levels of follicle-stimulating hormone (FSH) and luteinizing hormone (LH), whereas an irregular increase was observed in the levels of testosterone (T); furthermore, the levels of testosterone (T) gradually increased to a peak at 34 weeks. Based on RT-PCR results, as the genital length increased, only the expression of 17α-hydroxylase/17, 20-lyase (CYP17) mRNA slightly decreased at first, and then significantly increased to a peak, whereas the expression patterns of other genes were irregular. Furthermore, the CYP17 immunohistochemistry results also showed a pattern that was highly consistent with the patterns of mRNA expression and T secretion. In addition, based on body measurements, as body weight increased, the genital length increased. Thus, these results suggested that the CYP17 gene plays a key role in goose genital growth.
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Affiliation(s)
- W Sun
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - X Gan
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - J Hu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - L Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - J Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
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Lin Y, Shen W, Liu Y, Wang Q, Chen Q, Fang Z, Chi W, Gan X, Liu YZ. Visual preconditioning reduces emergence delirium in children undergoing ophthalmic surgery: a randomised controlled trial. Br J Anaesth 2018; 121:476-482. [PMID: 30032888 DOI: 10.1016/j.bja.2018.03.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 03/11/2018] [Accepted: 04/25/2018] [Indexed: 10/16/2022] Open
Abstract
BACKGROUND Emergence delirium is a common complication in children, especially in preschool children undergoing ophthalmic surgery. The aim of the study was to investigate the effects of visual preconditioning (application of an eyepatch over the eye to be operated for ≥3 h the day before surgery) on emergence delirium after ophthalmic surgery under sevoflurane anaesthesia. METHODS One hundred and seventy-nine children undergoing unilateral cataract surgery, aged 3-7 yr, were involved in this prospective, blinded, randomised study. Subjects were randomised to receive visual preconditioning (Group P, n=89) or to receive programmed explanation the day before surgery (Group C, n=90). The primary outcome was incidence of emergence delirium evaluated by the paediatric anaesthesia emergence delirium (PAED) scale. The secondary outcomes included emergence time and post-anaesthesia care unit (PACU) stay time. RESULTS Children in Group P had a significantly lower incidence of emergence delirium than those in Group C [16.9% vs 44.4%, odds ratio (OR) 4.0, 95% confidence interval (CI) 2.0 to 8.0]. The maximal PAED score was lower in Group P than in Group C [4 (0-20) vs 9 (0-20), median difference -3.0, 95% CI -5.0 to -1.0]. Visual preconditioning prolonged emergence time (P<0.001) and PACU stay time (P=0.002). CONCLUSION Visual disturbance contributes to emergence delirium in preschool children undergoing ophthalmic surgery with sevoflurane, and prophylactic eyepatch treatment can reduce emergence delirium. CLINICAL TRIALS REGISTRATION NCT02590744.
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Affiliation(s)
- Y Lin
- Department of Anaesthesiology, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - W Shen
- Department of Anaesthesiology, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Y Liu
- Department of Anaesthesiology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Q Wang
- Department of Anaesthesiology, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Q Chen
- Department of Anaesthesiology, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Z Fang
- Department of Anaesthesiology and Perioperative Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - W Chi
- Department of Cataract, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - X Gan
- Department of Anaesthesiology, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China.
| | - Y Z Liu
- Department of Cataract, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China
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Hu YJ, He YY, Wang YR, Liu C, Wang MM, Gan X, Wang W, Yan SF, Bai Y, Peng ZX, Li FQ, Xu J. [Serotype distribution and antimicrobial resistance of Salmonella isolates from retail chicken carcasses in six provinces of China]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:372-377. [PMID: 29614603 DOI: 10.3760/cma.j.issn.0253-9624.2018.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To obtain the serotype diversity and antimicrobial resistance of Salmonella isolates recovered from retail chicken carcasses for sale in six regions of China. Methods: From August 2010 to March 2012, each month 20 retail chicken carcasses including freshly slaughtered, chilled and frozen samples were collected from supermarkets and farmer's markets in 7 monitoring sites in Beijing, Jilin province, Inner Mongolia Autonomous, Shanxi province, Jiangsu province and Guangdong province, respectively. Samples were routinely collected for 12 months for each site. 1 680 chicken carcasses were collected in total and 2 629 Salmonella strains were isolated by PCR and biochemical method. Luminex xMAP method and classical slide agglutination method were carried out to determine isolates' serotypes. Minimal inhibitory concentrations (MICs) of 10 classes of antimicrobials including 14 agents were determined using broth micro-dilution method. Mocular methods were used to determine antimicrobial resistance genes of CIP-CTX-CT co-resistant isolates. Results: In all, 2 629 Salmonella isolates, there were 17 seorgroups and 58 serotypes, B and D1 were the dominant serogroups with rates of 34.7% (n=913) and 31.0% (n=815), Enteritidis (30.8%, n=810), Indiana (17.6%, n=463), Infantis (10.6%, n=278) were the top three serovars. We found 224 CIP-CTX co-resistant S. Indiana containing 3 colistin resistant strains, one of them carrying mcr-1 gene and being ESBLs positive, which demonstrated a nine multi drug resistance against 11 antimicrobials tested. Conclusion: These data began to describe the complicated serovar diversity and heavy antimicrobial resistance of Salmonella isolates recovered from retail chicken carcasses in six regions of China. The findings highlight the emergence of ciprofloxacin and cefotaxime co-resistant S. Indiana and also a mcr-1 positive S. Indiana with heavy multi drug resistance.
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Affiliation(s)
- Y J Hu
- Key Laboratory of Food Safety Risk Assessment of Health, China National Center for Food Safety Risk Assessment, Beijing 100021, China
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12
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Ma X, Meng Z, Jin L, Xiao Z, Wang X, Tsark WM, Ding L, Gu Y, Zhang J, Kim B, He M, Gan X, Shively JE, Yu H, Xu R, Huang W. CAMK2γ in intestinal epithelial cells modulates colitis-associated colorectal carcinogenesis via enhancing STAT3 activation. Oncogene 2017; 36:4060-4071. [PMID: 28319059 PMCID: PMC5509478 DOI: 10.1038/onc.2017.16] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/13/2016] [Accepted: 01/02/2017] [Indexed: 02/07/2023]
Abstract
Inflammation is one of the major risk factors for cancer. Here, we show that calcium/calmodulin-dependent protein kinase II gamma (CAMK2γ) in intestinal epithelial cells (IECs) modulates inflammatory signals and promotes colitis-associated cancer (CAC) in mice. We have identified CAMK2γ as a downstream target of colitis-induced WNT5a signaling. Furthermore, we have shown that CAMK2γ protects against intestine tissue injury by increasing IEC survival and proliferation. CAMK2γ knockout mice displayed reduced CAC. Furthermore, we used bone marrow transplantation to reveal that CAMK2γ in IECs, but not immune cells, was crucial for its effect on CAC. Consistently, transgenic over-expression of CAMK2γ in IECs accelerated CAC development. Mechanistically, CAMK2γ in IECs enhanced epithelial STAT3 activation to promote survival and proliferation of colonic epithelial cells during CAC development. These results thus identify a new molecular mechanism mediated by CAMK2γ in IECs during CAC development, thereby providing a potential new therapeutic target for CAC.
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Affiliation(s)
- X Ma
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,Irell and Manella Graduate School of Biological Sciences, City of Hope National Medical Center, Duarte, CA, USA
| | - Z Meng
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - L Jin
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, China
| | - Z Xiao
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,Department of Clinical Laboratory, Fujian Provincial Key Laboratory of Tumor Biotherapy, Fujian Provincial Cancer Hospital, Teaching Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - X Wang
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,Robert J Tomsich Institute of Pathology and Laboratory Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - W M Tsark
- Transgenic Mouse Core, City of Hope National Medical Center, Duarte, CA, USA
| | - L Ding
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Y Gu
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - J Zhang
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,Department of Hematology (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - B Kim
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,Irell and Manella Graduate School of Biological Sciences, City of Hope National Medical Center, Duarte, CA, USA
| | - M He
- School of Public Health, Guangxi Medical University, Nanning, Guangxi, China
| | - X Gan
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - J E Shively
- Departments of Immunology, City of Hope National Medical Center, Duarte, CA, USA
| | - H Yu
- Department of Cancer Immunotherapeutics and Tumor Immunology Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - R Xu
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,Department of Hematology (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - W Huang
- Molecular and Cellular Biology of Cancer Program, Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, City of Hope National Medical Center, Duarte, CA, USA.,Irell and Manella Graduate School of Biological Sciences, City of Hope National Medical Center, Duarte, CA, USA
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Zhu J, Huang D, Fu Q, Ao Q, Tan Y, Lan G, Guo Y, Zhang M, Gan X, Jiang H. Proteomic Analysis of Genetic Improvement of Farmed Tilapia (GIFT) Liver. CURR PROTEOMICS 2015. [DOI: 10.2174/157016461202150903115040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Li LP, Wang R, Liang WW, Huang T, Huang Y, Luo FG, Lei AY, Chen M, Gan X. Development of live attenuated Streptococcus agalactiae vaccine for tilapia via continuous passage in vitro. Fish Shellfish Immunol 2015; 45:955-963. [PMID: 26087276 DOI: 10.1016/j.fsi.2015.06.014] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/05/2015] [Accepted: 06/11/2015] [Indexed: 06/04/2023]
Abstract
Fish Streptococcus agalactiae (S. agalactiae) seriously harms the world's aquaculture industry and causes huge economic losses. This study aimed to develop a potential live attenuated vaccine of S. agalactiae. Pre-screened vaccine candidate strain S. agalactiae HN016 was used as starting material to generate an attenuated strain S. agalactiae YM001 by continuous passage in vitro. The biological characteristics, virulence, and stability of YM001 were detected, and the protective efficacy of YM001 immunization in tilapia was also determined. Our results indicated that the growth, staining, characteristics of pulsed-field gel electrophoresis (PFGE) genotype, and virulence of YM001 were changed significantly as compared to the parental strain HN016. High doses of YM001 by intraperitoneal (IP) injection (1.0 × 10(9) CFU/fish) and oral gavage (1.0 × 10(10) CFU/fish) respectively did not cause any mortality and morbidity in tilapia. The relative percent survivals (RPSs) of fishes immunized with YM001 (1.0 × 10(8) CFU/fish, one time) via injection, immersion, and oral administration were 96.88, 67.22, and 71.81%, respectively, at 15 days, and 93.61, 60.56, and 53.16%, respectively, at 30 days. In all tests with 1-3 times of immunization in tilapia, the dosages at 1 × 10(8) and 1 × 10(9) CFU/fish displayed the similar best results, whereas the immunoprotection of the dosages at 1 × 10(6) and 1 × 10(7) CFU/fish declined significantly (P < 0.01), and 1 × 10(5) CFU/fish hardly displayed any protective effect. In addition, the efficacy of 2-3 times of immunization was significantly higher than that of single immunization (P < 0.01) while no significant difference in the efficacy between twice and thrice of immunization was seen (P > 0.05). The level of protective antibody elicited by oral immunization was significantly higher compared to that of the control group (P < 0.01), and the antibody reached their maximum levels 14-21 days after the immunization but decreased significantly after 28 days of vaccination. YM001 bacteria were isolated from the brain, liver, kidney, and spleen tissues of fish after oral immunization and the bacteria existed for the longest time in the spleen (up to 15 days). Taken together, this study obtained a safe, stable, and highly immunogenic attenuated S. agalactiae strain YM001; oral immunization of tilapia with this strain produced a good immune protection.
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Affiliation(s)
- L P Li
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China
| | - R Wang
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China
| | - W W Liang
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China
| | - T Huang
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China
| | - Y Huang
- Guangxi Center for Disease Control and Prevention, Nanning 530021, China
| | - F G Luo
- Liuzhou's Aquaculture Technology Extending Station, Liuzhou 545006, China
| | - A Y Lei
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China
| | - M Chen
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China.
| | - X Gan
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China.
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15
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Li L, Shi Y, Wang R, Huang T, Liang W, Luo H, Gan X, Huang W, Li J, Lei A, Chen M. Proteomic analysis of tilapia Oreochromis niloticus Streptococcus agalactiae strains with different genotypes and serotypes. J Fish Biol 2015; 86:615-636. [PMID: 25604844 DOI: 10.1111/jfb.12582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Accepted: 10/15/2014] [Indexed: 06/04/2023]
Abstract
Nine tilapia Oreochromis niloticus group B streptococcus (GBS) strains differing in serotype and genotype were selected and paired. Two-dimensional difference gel electrophoresis (2D DIGE) and matrix-assisted laser-desorption ionization time-of-flight-mass spectrometry (MALDI-TOF-MS) were used to analyse the protein profiles of the strain pairs. Forty-three proteins corresponding to 66 spots were identified, of which 35 proteins were found in the seven selected strain pairs that represented pairs differing in genotype and serotype. Among the 35 proteins, numbers of differentially expressed proteins in strains of different serotypes were greater than found in strains of different genotypes, suggesting that serotype plays a more essential role than genotype in the differential protein expression among GBS strains. No distinct pattern was found with respect to genotype and the protein expression profile of GBS strains. Several proteins were identified as surface-associated cytoplasmic proteins that possessed the typical immunity-eliciting characteristics of surface proteins. The identified proteins were found to be involved in 16 biological processes and seven Kyoto encyclopaedia of genes and genomes (KEGG) pathways. The data, for the first time, identified differentially expressed proteins in O. niloticus GBS strains of different serotypes, which play a major role in immunogenicity of O. niloticus GBS than does genotype, offering further information for design of a vaccine against O. niloticus GBS.
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Affiliation(s)
- L Li
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
| | - Y Shi
- Institute of Animal Science and Technology, Guangxi University, Nanning, Guangxi 530005, China
| | - R Wang
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
| | - T Huang
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
| | - W Liang
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
| | - H Luo
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
| | - X Gan
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
| | - W Huang
- Institute of Animal Science and Technology, Guangxi University, Nanning, Guangxi 530005, China
| | - J Li
- Institute of Animal Science and Technology, Guangxi University, Nanning, Guangxi 530005, China
| | - A Lei
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
| | - M Chen
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning, Guangxi 530021, China
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Gan X, Rajapurohitam V, Huang C, Xue J, Chow J, Karmazyn M. P122Cardiac-specific deletion of Janus kinase 2 (JAK2) reveals marked cardiac pathology indicative of hypertrophy, heart failure and sudden cardiac death. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu082.62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang M, Gan X, Feng X, Tan W, Lv C, Zhu Y, Gu L. AB0415 High expression of gitr in serum and labial salivary glands from patients with primary sjögren’s syndrome. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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18
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Wang R, Chen M, Li C, Li LP, Gan X, Huang J, Lei AY, Xu ZH, Liang WW. Identification of multiple genes and their expression profiles in four strains of Oreochromis spp. in response to Streptococcus iniae. J Fish Biol 2013; 82:492-504. [PMID: 23398064 DOI: 10.1111/jfb.12004] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Two subtractive complementary DNA libraries were constructed from Nile tilapia Oreochromis niloticus vaccinated with formalin-killed Streptococcus iniae cells, and a further two constructed from O. niloticus infected with S. iniae. Of the 68 distinct expressed sequence tag (EST) contigs and singletons, 45 and 13 EST shared high similarities with genes of known and unknown functions, respectively. Ten EST contigs and singletons had no significant similarity to any sequences. Five putative immune-relevant genes, β2m, α-ha, mmp9, pgrn and cxcr4, were selected for quantitative reverse-transcription polymerase chain reaction in four strains of Oreochromis spp.: genetically improved farmed tilapia (O. niloticus), Oreochromis aureus, O. niloticus and O. niloticus×O. aureus, with different disease resistance following infection with S. iniae. pgrn was up-regulated more significantly in disease-resistant strains than in the susceptible. α-ha was markedly down-regulated, and no significant differences in the expression level of β2m were detected. A negative correlation was observed between the expression of mmp9 and that of cxcr4. The results provide insight into the molecular response of O. niloticus to S. iniae infection.
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Affiliation(s)
- R Wang
- Guangxi Institute of Fisheries, Nanning, Guangxi, People's Republic of China
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Liang K, Gan X, Deng Z. Traumatic forequarter amputation associated acute lung injury (ALI): report of one case. Eur Rev Med Pharmacol Sci 2012; 16:974-976. [PMID: 22953649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
One case of traumatic forequarter amputation associated acute lung injury (ALI) was presented. A discussion reviewing the treatment guidelines for this devastating injury, and pointing out the importance of supporting the lung and preventing the development of acute respiratory distress syndrome (ARDS) was included.
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Affiliation(s)
- K Liang
- Orthopaedic Department, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, P.R. China
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Abstract
Circulating obestatin is lowered by food intake, but factors involved in obestatin regulation remain unclear. The aim of this study was to determine whether intravenous glucose or insulin infusion lowers obestatin. Rats were infused over 3 h with either A. saline (controls); B. dextrose to steady state blood glucose ~16.7 mM, or C. insulin 7.5 mU/kg.min, plus dextrose as needed to clamp to euglycemic basal concentrations. During 3 h of infusion, group B had significantly greater (P<0.01) glucose, 18.75±1.27 mM, than groups A (6.10±0.33 mM) or C (6.19±0.18 mM). Groups B and C had hyperinsulinemia at the end of the 3 h infusion (1.02±0.03 ng/ml, 1.07±0.02 ng/ml) compared with saline-infused (0.38±0.01 ng/ml, P<0.01). Obestatin concentrations were significantly reduced (P<0.01) in both hyperinsulinemic groups and (B=0.95±0.06 ng/ml; C=0.87±0.04 ng/ml) versus controls (1.56±0.13 ng/ml). These data suggest that insulin can decrease the plasma obestatin levels.
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Affiliation(s)
- J Huang
- Department of Urologic Surgery, 85 hospital of PLA, Shanghai, China
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Fourati Ben Mustapha S, Khrouf M, Kacem Ben Rejeb K, Elloumi Chaabene H, Merdassi G, Wahbi D, Ben Meftah M, Zhioua F, Zhioua A, Azzarello A, Host T, Mikkelsen AL, Theofanakis CP, Dinopoulou V, Mavrogianni D, Partsinevelos GA, Drakakis P, Stefanidis K, Bletsa A, Loutradis D, Rienzi L, Cobo A, Paffoni A, Scarduelli C, Capalbo A, Garrido N, Remohi J, Ragni G, Ubaldi FM, Herrer R, Quera M, GIL E, Serna J, Grondahl ML, Bogstad J, Agerholm IE, Lemmen JG, Bentin-Ley U, Lundstrom P, Kesmodel US, Raaschou-Jensen M, Ladelund S, Guzman L, Ortega C, Albuz FK, Gilchrist RB, Devroey P, Smitz J, De Vos M, Bielanska M, Leveille MC, Borghi E, Magli MC, Figueroa MJ, Mascaretti G, Ferraretti AP, Gianaroli L, Szlit E, Leocata Nieto F, Maggiotto G, Arenas G, Tarducci Bonfiglio N, Ahumada A, Asch R, Sciorio R, Dayoub N, Thong J, Pickering S, Ten J, Carracedo MA, Guerrero J, Rodriguez-Arnedo A, Llacer J, Bernabeu R, Tatone C, Heizenrieder T, Di Emidio G, Treffon P, Seidel T, Eichenlaub-Ritter U, Cortezzi SS, Cabral EC, Ferreira CR, Trevisan MG, Figueira RCS, Braga DPAF, Eberlin MN, Iaconelli Jr. A, Borges Jr. E, Zabala A, Pessino T, Blanco L, Rey Valzacchi G, Leocata F, Ahumada A, Vanden Meerschaut F, Heindryckx B, Qian C, Deforce D, Leybaert L, De Sutter P, De las Heras M, De Pablo JL, Navarro B, Agirregoikoa JA, Barrenetxea G, Cruz M, Perez-Cano I, Gadea B, Herrero J, Martinez M, Roldan M, Munoz M, Pellicer A, Meseguer M, Munoz M, Cruz M, Roldan M, Gadea B, Galindo N, Martinez M, Pellicer A, Meseguer M, Perez-Cano I, Scarselli F, Alviggi E, Colasante A, Minasi MG, Rubino P, Lobascio M, Ferrero S, Litwicka K, Varricchio MT, Giannini P, Piscitelli P, Franco G, Zavaglia D, Nagy ZP, Greco E, Urner F, Wirthner D, Murisier F, Mock P, Germond M, Amorocho Llanos B, Calderon G, Lopez D, Fernandez L, Nicolas M, Landeras J, Finn-Sell SL, Leandri R, Fleming TP, Macklon NS, Cheong YC, Eckert JJ, Lee JH, Jung YJ, Hwang HK, Kang A, An SJ, Jung JY, Kwon HC, Lee SJ, Palini S, Zolla L, De Stefani S, Scala V, D'Alessandro A, Polli V, Rocchi P, Tiezzi A, Pelosi E, Dusi L, Bulletti C, Fadini R, Lain M, Mignini Renzini M, Brambillasca F, Coticchio G, Merola M, Guglielmo MC, Dal Canto M, Figueira R, Setti AS, Braga DPAF, Iaconelli Jr. A, Borges Jr. E, Worrilow KC, Uzochukwu CD, Eid S, Le Gac S, Esteves TC, van Rossem F, van den Berg A, Boiani M, Kasapi E, Panagiotidis Y, Goudakou M, Papatheodorou A, Pasadaki T, Prapas N, Prapas Y, Panagiotidis Y, Kasapi E, Goudakou M, Papatheodorou A, Pasadaki T, Vanderzwalmen P, Prapas N, Prapas Y, Norasing S, Atchajaroensatit P, Tawiwong W, Thepmanee O, Saenlao S, Aojanepong J, Hunsajarupan P, Sajjachareonpong K, Punyatanasakchai P, Maneepalviratn S, Jetsawangsri U, Herrero J, Cruz M, Tejera A, Rubio I, Romero JL, Meseguer M, Nordhoff V, Schlatt S, Schuring AN, Kiesel L, Kliesch S, Azambuja R, Okada L, Lazzari V, Dorfman L, Michelon J, Badalotti M, Badalotti F, Petracco A, Schwarzer C, Esteves TC, Nordhoff V, Schlatt S, Boiani M, Versieren K, Heindryckx B, De Croo I, Lierman S, De Vos W, Van den Abbeel E, Gerris J, De Sutter P, Milacic I, Borogovac D, Veljkovic M, Arsic B, Jovic Bojovic D, Lekic D, Pavlovic D, Garalejic E, Guglielmo MC, Coticchio G, Albertini DF, Dal Canto M, Brambillasca F, Mignini Renzini M, De Ponti E, Fadini R, Sanges F, Talevi R, Capalbo A, Papini L, Mollo V, Ubaldi FM, Rienzi LF, Gualtieri R, Albuz FK, Guzman L, Orteg C, Gilchrist RB, Devroey P, De Vos M, Smitz J, Choi J, Lee H, Ku S, Kim S, Choi Y, Kim J, Moon S, Demilly E, Assou S, Moussaddykine S, Dechaud H, Hamamah S, Takisawa T, Doshida M, Hattori H, Nakamura Y, Kyoya T, Shibuya Y, Nakajo Y, Tasaka A, Toya M, Kyono K, Novo S, Penon O, Gomez R, Barrios L, Duch M, Santalo J, Esteve J, Nogues C, Plaza JA, Perez-Garcia L, Ibanez E, Chavez S, Loewke K, Behr B, Reijo Pera R, Huang S, Wang H, Soong Y, Chang C, Okimura T, Kuwayama M, Mori C, Morita M, Uchiyama K, Aono F, Kato K, Takehara Y, Kato O, Minasi M, Casciani V, Scarselli F, Rubino P, Colasante A, Arizzi L, Litwicka K, Ferrero S, Mencacci C, Piscitelli C, Giannini P, Cucinelli F, Tocci A, Nagy ZP, Greco E, Wydooghe E, Vandaele L, Dewulf J, Van den Abbeel E, De Sutter P, Van Soom A, Moon JH, Son WY, Mahfoudh A, Henderson S, Jin SG, Shalom-Paz E, Dahan M, Holzer H, Mahmoud K, Triki-Hmam C, Terras K, Zhioua F, Hfaiedh T, Ben Aribia MH, Otsubo H, Egashira A, Tanaka K, Matsuguma T, Murakami M, Murakami K, Otsuka M, Yoshioka N, Araki Y, Kuramoto T, Smit JG, Sterrenburg MD, Eijkemans MJC, Al-Inany HG, Youssef MAFM, Broekmans FJM, Willoughby K, DiPaolo L, Deys L, Lagunov A, Amin S, Faghih M, Hughes E, Karnis M, Ashkar F, King WA, Neal MS, Antonova I, Veleva L, Petkova L, Shterev A, Nogales C, Martinez E, Ariza M, Cernuda D, Gaytan M, Linan A, Guillen A, Bronet F, Cottin V, Fabian D, Allemann F, Koller A, Spira JC, Agudo D, Martinez-Burgos M, Arnanz A, Basile N, Rodriguez A, Bronet F, Cho YS, Filioli Uranio M, Ambruosi B, Paternoster MS, Totaro P, Sardanelli AM, Dell'Aquila ME, Zollner U, Hofmann T, Zollner KP, Kovacic B, Roglic P, Vlaisavljevic V, Sole M, Santalo J, Boada M, Coroleu B, Veiga A, Martiny G, Molinari M, Revelli A, Chimote NM, Chimote M, Mehta B, Chimote NN, Sheikh N, Nath N, Mukherjee A, Rakic K, Reljic M, Kovacic B, Vlaisavljevic V, Ingerslev HJ, Kirkegaard K, Hindkjaer J, Grondahl ML, Kesmodel US, Agerholm I, Kitasaka H, Fukunaga N, Nagai R, Yoshimura T, Tamura F, Kitamura K, Hasegawa N, Nakayama K, Katou M, Itoi F, Asano E, Deguchi N, Ooyama K, Hashiba Y, Asada Y, Michaeli M, Rotfarb N, Karchovsky E, Ruzov O, Atamny R, Slush K, Fainaru O, Ellenbogen A, Chekuri S, Chaisrisawatsuk T, Chen P, Pangestu M, Jansen S, Catt S, Molinari E, Racca C, Revelli A, Ryu C, Kang S, Lee J, Chung D, Roh S, Chi H, Yokota Y, Yokota M, Yokota H, Sato S, Nakagawa M, Komatsubara M, Makita M, Araki Y, Yoshimura T, Asada Y, Fukunaga N, Nagai R, Kitasaka H, Itoi F, Tamura F, Kitamura K, Hasegawa N, Katou M, Nakayama K, Asano E, Deguchi N, Oyama K, Hashiba Y, Naruse K, Kilani S, Chapman MG, Kwik M, Chapman M, Guven S, Odaci E, Yildirim O, Kart C, Unsal MA, Yulug E, Isachenko E, Maettner R, Strehler E, Isachenko V, Hancke K, Kreienberg R, Sterzik K, Coticchio G, Guglielmo MC, Dal Canto M, Albertini DF, Brambillasca F, Mignini Renzini M, Fadini R, Zheng XY, Wang LN, Liu P, Qiao J, Inoue F, Dashtizad M, Wahid H, Rosnina Y, Daliri M, Hajarian H, Akbarpour M, Abbas Mazni O, Knez K, Tomaevic T, Vrtacnik Bokal E, Zorn B, Virant Klun I, Koster M, Liebenthron J, Nicolov A, van der Ven K, van der Ven H, Montag M, Fayazi M, Salehnia M, Beigi Boroujeni M, Khansarinejad B, Deignan K, Emerson G, Mocanu E, Wang JJ, Andonov M, Linara E, Ahuja KK, Nachef S, Figueira RCS, Braga DPAF, Setti AS, Iaconelli Jr. A, Pasqualotto FF, Borges Jr. E, Pasqualotto E, Borges Jr. E, Pasqualotto FF, Chang CC, Bernal DP, Elliott TA, Shapiro DB, Toledo AA, Nagy ZP, Economou K, Davies S, Argyrou M, Doriza S, Sisi P, Moschopoulou M, Karagianni A, Mendorou C, Polidoropoulos N, Papanicopoulos C, Stefanis P, Karamalegos C, Cazlaris H, Koutsilieris M, Mastrominas M, Gotts S, Doshi A, Harper J, Serhal P, Borini A, Guzeloglu-Kayisli O, Bianchi V, Seli E, Bianchi V, Lappi M, Bonu MA, Borini A, Mizuta S, Hashimoto H, Kuroda Y, Matsumoto Y, Mizusawa Y, Ogata S, Yamada S, Kokeguchi S, Noda Y, Shiotani M, Stojkovic M, Ilic M, Markovic N, Stojkovic P, Feng G, Zhang B, Zhou H, Zhou L, Gan X, Qin X, Shu J, Wu F, Molina Botella I, Lazaro Ibanez E, Debon Aucejo A, Pertusa J, Fernandez Colom PJ, Pellicer A, Li C, Zhang Y, Cui Y, Zhao H, Liu J, Oliveira JBA, Petersen CG, Mauri AL, Massaro FC, Silva LFI, Ricci J, Cavagna M, Pontes A, Vagnini LD, Baruffi RLR, Franco Jr. JG, Massaro FC, Petersen CG, Vagnini LD, Mauri AL, Silva LFI, Felipe V, Cavagna M, Pontes A, Baruffi RLR, Oliveira JBA, Franco Jr. JG, Vilela M, Tiveron M, Lombardi C, Viglierchio MI, Marconi G, Rawe V, Wale PL, Gardner DK, Nakagawa K, Sugiyama R, Nishi Y, Kuribayashi Y, Jyuen H, Yamashiro E, Shirai A, Sugiyama R, Inoue M, Salehnia M, Hovatta O, Tohonen V, Inzunza J, Parmegiani L, Cognigni GE, Bernardi S, Ciampaglia W, Infante FE, Tabarelli de Fatis C, Pocognoli P, Arnone A, Maccarini AM, Troilo E, Filicori M, Radwan P, Polac I, Borowiecka M, Bijak M, Radwan M. POSTER VIEWING SESSION - EMBRYOLOGY. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.79] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Gan X, Luo Y, Ling F, Ji X, Chen J, Ding Y. Outcome in acute stroke with different intra-arterial infusion rate of urokinase on thrombolysis. Interv Neuroradiol 2010; 16:290-6. [PMID: 20977863 DOI: 10.1177/159101991001600311] [Citation(s) in RCA: 8] [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] [Received: 05/08/2010] [Accepted: 07/03/2010] [Indexed: 12/18/2022] Open
Abstract
Intra-arterial infusion of urokinase (UK) has been widely used. However, the optimal infusion rate of the reagent has never been determined. This was investigated in the acute stage of middle cerebral artery (MCA) embolism in the present study. Sprague Dawley male rats (n=43) were randomly divided into sham-operation and five ischemic groups with urokinase administration at different infusion rates or without urokinase administration. Ischemia was induced with MCA embolism. Two hours after embolism, total urokinase (urokinase, 170,000U/kg) was given in groups A,B,C and D (n=8 each) at different rates: 1,000 U (0.03 ml/min) per minute, 4,000U (0.12 ml/min), 10,000U (0.30 ml/min), and 16,000U (0.48 ml/min), respectively. Group E received normal saline at a rate of 0.48 ml/min. The sham-operation group (no embolism) received urokinase at (170,000U/kg, 1.5 ml, 16,000 U/min). During ischemia and thrombolysis, regional cerebral blood flow (CBF) was monitored by laser Doppler flowmetry. The neurological deficits, infarct volumes and mortalities in each group were determined. The CBF in ischemic hemisphere were significantly (p<0.05) decreased after embolism in groups A∼E at similar levels (27.32±8.20% to 34.71±6.84%). After different treatments, in group B 4,000U/min infusion of UK induced the best reperfusion, the least neurological deficits and infarct volume, as well as the least mortality and lowest incidence of hemorrhage. The effect of intra-artery thrombolysis of urokinase was related to the infusion rate. Our study demonstrated an optimal infusion rate at 4,000U/min, suggesting relatively low levels of infusion are better able to improve brain reperfusion and reduce brain injury after stroke.
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Affiliation(s)
- X Gan
- Xuanwu Hospital, Capital Medical University, Beijing, China
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Kapsokalivas L, Gan X, Albrecht AA, Steinhöfel K. Population-based local search for protein folding simulation in the MJ energy model and cubic lattices. Comput Biol Chem 2009; 33:283-94. [PMID: 19647489 DOI: 10.1016/j.compbiolchem.2009.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Accepted: 06/17/2009] [Indexed: 10/20/2022]
Abstract
We present experimental results on benchmark problems in 3D cubic lattice structures with the Miyazawa-Jernigan energy function for two local search procedures that utilise the pull-move set: (i) population-based local search (PLS) that traverses the energy landscape with greedy steps towards (potential) local minima followed by upward steps up to a certain level of the objective function; (ii) simulated annealing with a logarithmic cooling schedule (LSA). The parameter settings for PLS are derived from short LSA-runs executed in pre-processing and the procedure utilises tabu lists generated for each member of the population. In terms of the total number of energy function evaluations both methods perform equally well, however, PLS has the potential of being parallelised with an expected speed-up in the region of the population size. Furthermore, both methods require a significant smaller number of function evaluations when compared to Monte Carlo simulations with kink-jump moves.
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Affiliation(s)
- L Kapsokalivas
- King's College London, Department of Computer Science, London WC2R 2LS, England, United Kingdom
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Huang JY, Liu YX, Liu T, Gan X, Liu XJ. A nitric oxide biosensor based on the photovoltaic effect of nano titanium dioxide on hemoglobin. J Anal Chem 2009. [DOI: 10.1134/s1061934809070132] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Luan X, Yu H, Wei X, Zhou Y, Wang W, Li P, Gan X, Wei D, Xiao J. GPR54 polymorphisms in Chinese girls with central precocious puberty. Neuroendocrinology 2007; 86:77-83. [PMID: 17700012 DOI: 10.1159/000107511] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [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: 02/01/2007] [Accepted: 05/17/2007] [Indexed: 11/19/2022]
Abstract
AIMS The GPR54 gene has been proved to be important in the process of puberty onset, yet no association study has been performed to evaluate the effect of polymorphisms in the gene on central precocious puberty (CPP). This study was designed to scan for polymorphisms in the GPR54 gene and to investigate the relationships between the genotypes of GPR54 and the disease. METHODS 272 Chinese Han girls diagnosed to be CPP patients were recruited as the case group and 288 unrelated normal Chinese Han girls as the control group. The whole GPR54 gene was directly sequenced in randomly selected case samples, and the polymorphisms identified were genotyped by ligase detection reaction in both groups. Distributions of the polymorphisms and haplotypes were calculated for statistical evaluation. RESULTS Totally 6 polymorphisms were found in sequencing, one of which is a nonsynonymous mutation, while genotyping declared that another SNP located in the promoter region was statistically related to the disease (p = 0.037). CONCLUSION One polymorphism in GPR54 gene might be correlated with some cases of CPP, likely by changes in expression of the receptor, but the moderate p value and the lack of functional data make it hard to confirm the correlation. Further studies on the polymorphisms are needed for the exact mechanism.
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Affiliation(s)
- X Luan
- State Key Laboratory of Bioreactor Engineering, Institute of Biochemistry, East China University of Science and Technology, Shanghai, PR China
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Abstract
We report on the measurement of second-harmonic signals from hyperplastic parenchyma and stroma in malignant human prostate tissue under femtosecond pulsed illumination in the wavelength range from 730 to 870 nm. In particular, the relationship of the second-harmonic generation to the excitation wavelength is measured. The result in these two regions behaves considerably differently and thus provides a possible indicator for identifying tissue components and malignancy.
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Affiliation(s)
- Xiaoyuan Deng
- Centre for Micro-Photonics, School of Biophysical Sciences and Electrical Engineering, Swinburne University of Technology, Hawthorn, Victoria, Australia
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Gan X, Kaplan R, Menke JG, MacNaul K, Chen Y, Sparrow CP, Zhou G, Wright SD, Cai TQ. Dual mechanisms of ABCA1 regulation by geranylgeranyl pyrophosphate. J Biol Chem 2001; 276:48702-8. [PMID: 11641412 DOI: 10.1074/jbc.m109402200] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [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: 11/06/2022] Open
Abstract
ATP-binding cassette transporter A1 (ABCA1) mediates an active efflux of cholesterol and phospholipids and is mutated in patients with Tangier disease. Expression of ABCA1 may be increased by certain oxysterols such as 22(R)-hydroxycholesterol via activation of the nuclear hormone receptor liver X receptor (LXR). In searching for potential modulators of ABCA1 expression, we have studied the effects of various mevalonate metabolites on the expression of ABCA1 in two human cell lines, THP-1 and Caco-2 cells. Most of the tested metabolites, including mevalonate, geranyl pyrophosphate, farnesyl pyrophosphate, and ubiquinone, failed to significantly change the expression levels of ABCA1. However, treatment with geranylgeranyl pyrophosphate resulted in a dose- and time-dependent reduction of ABCA1 expression. Geranylgeranyl pyrophosphate appears to reduce ABCA1 expression via two different mechanisms. One of these mechanisms is by acting directly as an antagonist of LXR since it reduces the interaction between LXR alpha or -beta with nuclear coactivator SRC-1. Another mechanism appears to involve activation of the Rho GTP-binding proteins since treatment of Caco-2 cells with inhibitors of geranylgeranyl transferase or the Rho proteins significantly increased the expression and promoter activity of ABCA1. Further studies showed that mutations in the DR4 element of the ABCA1 promoter completely eliminate the inducible activities of these inhibitors. These data indicate that activation of the Rho proteins may change the activation status of LXR.
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Affiliation(s)
- X Gan
- Department of Atherosclerosis and Endocrinology, Merck Research Laboratories, Rahway, New Jersey 07065, USA
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Abstract
Multi-photon fluorescence microscopy has been cited for its advantage in increased depth penetration due to low linear absorption and scattering coefficient of biological specimen in the near infrared (NIR) range. Because of the need of high peak power for efficiently exciting two-photon fluorescence, the relationship between cell damage and peak power has become an interesting and much debated topic in the applications of multi-photon fluorescence microscopy. It is conceivable that at high illumination intensity, non-linear photochemical processes have impacts on cell physiology and viability in ways much different from low illumination in the linear domain. In this article, we discuss some of the issues in two-photon fluorescence microscopy, including the degree of transparency of the specimen, a comparison of single- and two-photon excited fluorescence spectra, and the cell damage under high intensity illumination, using plant cells as a model.
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Affiliation(s)
- P Cheng
- Advanced Microscopy and Imaging Laboratory, Department of Electrical Engineering, State University of New York, Buffalo, NY 14260, USA
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Gan X, Jarstrand C, Herting E, Berggren P, Robertson B. Effect of surfactant and specific antibody on bacterial proliferation and lung function in experimental pneumococcal pneumonia. Int J Infect Dis 2001; 5:9-18. [PMID: 11285153 DOI: 10.1016/s1201-9712(01)90042-6] [Citation(s) in RCA: 6] [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: 11/18/2022] Open
Abstract
OBJECTIVE To investigate the effect of surfactant and specific antibody on bacterial proliferation in experimental pneumococcal pneumonia. METHODS Near-term newborn rabbits received a standard dose (10(7)) of type 3 pneumococci via the airways. Control animals were sacrificed 1 minute later. Other animals were ventilated for 5 hours and treated via the tracheal cannula with surfactant (Curosurf 200 mg/kg), a mixture of surfactant and a polyclonal antipneumococcal antibody, the antibody without surfactant, or saline. RESULTS There was a significant bacterial proliferation in lung tissue in all animals ventilated for 5 hours. Bacterial growth, expressed as log10 colony forming units (CFU) per gram of lung tissue was less prominent in animals treated with a mixture of surfactant and specific antibody than in animals treated with antibody alone (median, 7.51, range, 6.80--7.70 vs. median, 7.92, range, 7.07--8.50; P < 0.05). Dynamic lung-thorax compliance was improved with surfactant or surfactant plus antibody in comparison with saline or antibody alone. CONCLUSIONS The data suggest that the suppressive effect of the antibody on bacterial proliferation becomes evident only when surfactant is administered together with the antibody.
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Affiliation(s)
- X Gan
- Division for Experimental Perinatal Pathology, Department of Woman and Child Health, Karolinska Hospital, Stockholm, Sweden
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Abstract
Matrix metalloproteinase-9 (MMP-9) may play an important role in the development of inflammatory bowel disease (IBD). However, the cellular source of MMP-9 in the inflamed mucosa of IBD remains unclear. Here we report that MMP-9 mRNA is expressed in CaCO-2 cells, an intestinal epithelial cell line, and that its expression is upregulated by inflammatory stimuli. Stimulation of CaCO-2 cells with interleukin-1beta (IL-1beta) or tumor necrosis factor-alpha (TNF-alpha) led to a dose-dependent increase in expression and secretion of MMP-9. In contrast, bacterial lipopolysaccharide (LPS) failed to induce expression or secretion of MMP-9, suggesting that an inflammatory reaction leading to cytokine release is a necessary step for the induction of MMP-9 release in intestinal epithelial cells. Additional studies show that induction of MMP-9 mRNA peaked at 16 h of IL-1beta stimulation, whereas expression of monocyte chemoattractant protein-1 (MCP-1) and IL-8 both peaked at 3 h of stimulation. Treatment of CaCO-2 cells with rosiglitazone, a peroxisome proliferator-activated receptor-gamma (PPAR-gamma) agonist, significantly reduced secretion of MMP-9, indicating that agents that activate PPAR-gamma may have therapeutic use in patients with IBD.
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Affiliation(s)
- X Gan
- Department of Lipid Biochemistry, Merck Research Laboratories, Rahway, NJ 07065, USA
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Xu MG, Crimeen B, Ludford-Menting MJ, Gan X, Russell SM, Gu M. Three-dimensional localisation of fluorescence resonance energy transfer in living cells under two-photon excitation. Scanning 2001; 23:9-13. [PMID: 11272338 DOI: 10.1002/sca.4950230102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three-dimensional (3-D) imaging of fluorescence resonance energy transfer (FRET) in human cells under two-photon excitation was demonstrated in this study. A sample was prepared by expressing a donor and an acceptor in living cells and using an antibody to secure the proximity of contact between the donor and the acceptor. The quenching of fluorescence emission of a donor in the double-labelled cells indicates the presence of FRET that occurred in these living cells. Because of the quadratic relation of the excitation power, 3-D localisation of FRET becomes possible.
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Affiliation(s)
- M G Xu
- Centre for Micro-Photonics, School of Biophysical Sciences and Electrical Engineering, Swinburne University of Technology, Hawthorn, Victoria, Australia
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Zhan J, Gan X, Wu X, Li J, Zeng Z. [Clinical analysis of 224 cases of small intestine disease]. Zhonghua Nei Ke Za Zhi 2000; 39:592-3. [PMID: 11798523] [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 increase the knowledge of small intestine disease, improve the diagnostic rate and discusses the examination methods. METHODS 224 cases of small intestine disease were studied and their major symptoms, etiology, diagnostic methods were analyzed. RESULTS The major symptoms of small intestine disease were abdominal pain (58%), abdominal mass (18%), fever (17%) and hematochezia (12%). The most common disease of small intestine was malignant tumor (32%), others were diverticulum (29%), leiomyomas (7%), hemorrhagic necrotizing enteritis (6%), Crohn's disease (4%). Double-contrast enteroclysis and laparotomy were still the major diagnostic methods. CONCLUSION Malignant tumor was the most common disease of small intestine. More attention should be paid to the diagnosis of small intestine disease.
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Affiliation(s)
- J Zhan
- Gastrointestinal Division of Internal Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University of Medical Sciences, Guangzhou, 510120, China
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Abstract
We compare the effects of spherical aberration on the penetration depth of single-photon and two-photon excitation for instances in which the aberration is caused by the refractive-index mismatch when a beam is focused through an interface. It is shown both theoretically and experimentally that two-photon fluorescence imaging experiences less spherical aberration and can thus propagate to a deeper depth within a thick medium.
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Affiliation(s)
- D Ganic
- Centre for Micro-Photonics, School of Biophysical Sciences and Electrical Engineering, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Victoria, Australia
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Green JA, Xie S, Quan X, Bao B, Gan X, Mathialagan N, Beckers JF, Roberts RM. Pregnancy-associated bovine and ovine glycoproteins exhibit spatially and temporally distinct expression patterns during pregnancy. Biol Reprod 2000; 62:1624-31. [PMID: 10819764 DOI: 10.1095/biolreprod62.6.1624] [Citation(s) in RCA: 187] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The pregnancy-associated glycoproteins (PAG) constitute a large family of recently duplicated genes. They show structural resemblance to pepsin and related aspartic proteinases. A total of 21 bovine (bo) PAG and 9 ovine (ov) PAG cDNA have been identified. Phylogenetic analysis indicated that the PAG are divided into two main groupings that accurately reflect their tissue expression, as determined by in situ hybridization. In the first pattern, represented by ovPAG-2 and boPAG-2, -8, -10, and -11 (where the numbering is arbitrary and reflects order of discovery within species), expression occurred throughout the outer epithelial layer of the placenta (trophectoderm). The second pattern was predominant localization to binucleate cells. Ribonuclease protection assays, which allow discrimination between closely related transcripts, have shown that the expression of PAG varies in a temporal manner over pregnancy. Of those bovine PAG expressed predominantly in binucleate cells, boPAG-1, -6, and -7 are expressed weakly, if at all, by Day 25 placenta, but are present at the middle and end of pregnancy. Others, such as boPAG-4, -5, and -9, are expressed at Day 25 and at earlier stages. Although not among the earliest PAG produced by the trophoblast, boPAG-1 has been used for pregnancy diagnosis, particularly in dairy cows, where there is a major need for a sensitive method capable of detecting pregnancy within 1 mo of conception. It seems likely that some of the newly discovered PAG will be better candidates than PAG-1 for pregnancy diagnosis.
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Affiliation(s)
- J A Green
- Department of Animal Sciences, University of Missouri-Columbia, Columbia, Missouri 65211, USA
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Gan X, Gu M. Spatial distribution of single-photon and two-photon fluorescence light in scattering media: Monte Carlo simulation. Appl Opt 2000; 39:1575-1579. [PMID: 18345054 DOI: 10.1364/ao.39.001575] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Three-dimensional fluorescence spatial distributions under single-photon and two-photon excitation within a turbid medium are studied with Monte Carlo simulation. It is demonstrated that two-photon excitation has an advantage of producing much less fluorescence light outside the focal region compared with single-photon excitation. With the increase of the concentration of scattering particles in a turbid medium, the position of the maximum fluorescence intensity point shifts from the geometric focal region toward the medium surface. Further studies show that the optical sectioning property of two-photon fluorescence microscopy is degraded in thick turbid media or when the numerical aperture of an objective becomes low.
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Affiliation(s)
- X Gan
- Optoelectronic Imaging Group, School of Communications and Informatics, Victoria University of Technology, PO Box 14428, Melbourne City Mail Centre, Victoria 8001, Australia
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Li H, Li X, Gan X. [Specific antibodies for the early diagnosis of rheumatoid arthritis]. Zhonghua Yi Xue Za Zhi 2000; 80:20-4. [PMID: 11798731] [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 assess the specificity and sensitivity of antiperinuclear factor (APF), anti-keratin antibody (AKA), anti-Sa antibody and anti-RA33 antibody in the diagnosis of RA. METHODS 128 patients with RA, whose durations were within 1 year, were included. APF and AKA were detected by indirect immunofluorescence on the human buccal mucosa cells and the straum corneum of Wistar rat esophagus. Anti-Sa antibody and anti-RA33 antibody were examined by Western blotting. Sa antigen was extracted from human placenta while RA33 antigen from Ehrlich cells. RESULTS (1) The specificities and sensitivities of APF, AKA, anti-Sa antibody and anti-RA33 antibody were 91.4% (224/245) & 35.2% (45/128), 90.2% (221/245) & 32.0% (43/128), 90.6% (222/245) & 33.6% (43/128), 89.8% (220/245) & 28.9% (37/128), respectively, versus 72.3% (177/245) & 44.5% (57/128) for rheumatoid factor (RF). There were no statistical differences in the specificity between the four antibody groups and RF until 1:128 were taken as positive titer. Among 71 patients with RF-negative RA, 15 (21.1%) were positive for APF, 18 (25.4%) positive for AKA, 21 (29.6%) positive for anti-Sa antibody and 17 (23.9%) positive for anti-RA33 antibody. (2) Specificity and sensitivity were 95.1% (233/245) and 46.1% (59/128) respectively when two of the four antibodies turned out to be both positive. If three or more kinds were detected simultaneously, specificity was as much as 99.6% (108/128). (3) Statistical difference was found among the four groups defined by the number of positive antibodies in radiographic stage and patients assessment of illness. CONCLUSION (1) Dictation of APF, AKA, anti-Sa antibody and anti-RA33 antibody can greatly improve the specificity of diagnosis of early RA and serve as a complement when RF is negative. (2) Combined detection of the above four antibodies has a better discrimination ability as a laboratory criterion than that of RF. (3) Three or more positive antibodies may be an indicator of severe bone erosion and emergent demand for early treatment with better outcome.
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Affiliation(s)
- H Li
- Department of Rheumatology and Immunology, Peking Union Medical College Beijing 100730, China
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37
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Berger O, Gan X, Gujuluva C, Burns AR, Sulur G, Stins M, Way D, Witte M, Weinand M, Said J, Kim KS, Taub D, Graves MC, Fiala M. CXC and CC chemokine receptors on coronary and brain endothelia. Mol Med 1999; 5:795-805. [PMID: 10666479 PMCID: PMC2230493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
BACKGROUND Chemokine receptors on leukocytes play a key role in inflammation and HIV-1 infection. Chemokine receptors on endothelia may serve an important role in HIV-1 tissue invasion and angiogenesis. MATERIALS AND METHODS The expression of chemokine receptors in human brain microvascular endothelial cells (BMVEC) and coronary artery endothelial cells (CAEC) in vitro and cryostat sections of the heart tissue was determined by light and confocal microscopy and flow cytometry with monoclonal antibodies. Chemotaxis of endothelia by CC chemokines was evaluated in a transmigration assay. RESULTS In BMVEC, the chemokine receptors CCR3 and CXCR4 showed the strongest expression. CXCR4 was localized by confocal microscopy to both the cytoplasm and the plasma membrane of BMVEC. In CAEC, CXCR4 demonstrated a strong expression with predominantly periplasmic localization. CCR5 expression was detected both in BMVEC and CAEC but at a lower level. Human umbilical cord endothelial cells (HUVEC) expressed strongly CXCR4 but only weakly CCR3 and CCR5. Two additional CC chemokines, CCR2A and CCR4, were detected in BMVEC and CAEC by immunostaining. Immunocytochemistry of the heart tissues with monoclonal antibodies revealed a high expression of CXCR4 and CCR2A and a low expression of CCR3 and CCR5 on coronary vessel endothelia. Coronary endothelia showed in vitro a strong chemotactic response to the CC chemokines RANTES, MIP-1alpha, and MIP-1beta. CONCLUSIONS The endothelia isolated from the brain display strongly both the CCR3 and CXCR4 HIV-1 coreceptors, whereas the coronary endothelia express strongly only the CXCR4 coreceptor. CCR5 is expressed at a lower level in both endothelia. The differential display of CCR3 on the brain and coronary endothelia could be significant with respect to the differential susceptibility of the heart and the brain to HIV-1 invasion. In addition, CCR2A is strongly expressed in the heart endothelium. All of the above chemokine receptors could play a role in endothelial migration and repair.
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Affiliation(s)
- O Berger
- Department of Neurology, UCLA School of Medicine, Los Angeles, California 90095-1769, USA
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Abstract
We developed a rapid fluorometric viability assay for primary cultures of OL precursors (preOLs) or mature OLs that utilized the oxidation/reduction indicator dye Alamar Blue (AB). PreOLs had a lower rate of AB reduction than did mature OLs (0.02 +/- 0.01 units/min per cell versus 0.07 +/- 0.01). The assay was tested under two conditions toxic to preOLs: oxidative stress induced by glutathione depletion or kainate excitotoxicity. When glutathione was depleted by a 24-h exposure to cystine-depleted medium, the EC50 values for the dependence upon cystine for survival did not differ significantly when determined by AB reduction (2 +/- 2 microM), by the trypan blue exclusion method (3 +/- 3 microM) or by MTT histochemistry (1 +/- 0.4 microM). Quantification of preOL viability with AB was unaffected by the presence of free radical scavengers (alpha-tocopherol or idebenone) or the antioxidant enzymes Cu,Zn-superoxide dismutase and catalase. There was no difference in preOL viability as determined by AB or MTT after a 24-h exposure to kainate at concentrations up to 1 mM. AB offers a rapid objective measure of OL viability in primary culture and is a valid means to quantify OL death.
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Affiliation(s)
- S A Back
- Department of Neurology, Children's Hospital and Harvard Medical School, Boston, MA 02115, USA
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Herting E, Gan X, Rauprich P, Jarstrand C, Robertson B. Combined treatment with surfactant and specific immunoglobulin reduces bacterial proliferation in experimental neonatal group B streptococcal pneumonia. Am J Respir Crit Care Med 1999; 159:1862-7. [PMID: 10351931 DOI: 10.1164/ajrccm.159.6.9810047] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Neonates suffering from group B streptococcal (GBS) pneumonia often lack type-specific opsonizing antibodies. We studied the influence of combined intratracheal treatment with surfactant and a specific antibacterial polyclonal antibody (IgG fraction) on bacterial proliferation and lung function in an animal model of GBS pneumonia. Near-term newborn rabbits received an intratracheal injection of either the specific IgG antibody, nonspecific IgG, surfactant, a mixture of surfactant and the antibody, or 0.9% saline. At 30 min the rabbits were infected with a standard dose (10(8)) of the encapsulated GBS strain 090 Ia. After 5 h of mechanical ventilation the mean estimated increase in bacterial number in lung homogenate (log10 colonies/g) was 0.76 in the antibody group, 0.92 in the nonspecific IgG group, 0.55 in the surfactant group, and 1.29 in the saline group. A mean decrease in bacterial number (-0.05) was observed in the group that received combined treatment with surfactant and antibody (p < 0.05 versus all other groups). Lung-thorax compliance was significantly higher in both groups of surfactant-treated animals compared with saline or IgG treatment. We conclude that in experimental neonatal GBS pneumonia combined treatment with surfactant and a specific immunoglobulin against GBS reduced bacterial proliferation more effectively than either treatment alone.
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Affiliation(s)
- E Herting
- Department of Pediatrics, University of Göttingen, Göttingen, Germany.
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40
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Gan X, Gu M. Effective point-spread function for fast image modeling and processing in microscopic imaging through turbid media. Opt Lett 1999; 24:741-3. [PMID: 18073840 DOI: 10.1364/ol.24.000741] [Citation(s) in RCA: 6] [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: 05/16/2023]
Abstract
An effective point-spread function (EPSF) for microscopic imaging through turbid media is proposed and calculated. The EPSF incorporates the property of a microscope system as well as the scattering property of a turbid medium. We prove that the image of a thin object embedded in a turbid medium can be expressed by the convolution of the EPSF with an object function. With the help of the convolution relation, image modeling for 5, 000, 000 incident photons can be approximately 15 times faster than the direct Monte Carlo simulation method for a one-dimensional object and can be at least 2 orders of magnitude faster for a two-dimensional object.
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Affiliation(s)
- X Gan
- Optoelectronic Imaging Group, School of Communications and Informatics, Victoria University of Technology, P.O. Box 14428 MCMC, Victoria 8001, Australia
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41
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Green JA, Xie S, Szafranska B, Gan X, Newman AG, McDowell K, Roberts RM. Identification of a new aspartic proteinase expressed by the outer chorionic cell layer of the equine placenta. Biol Reprod 1999; 60:1069-77. [PMID: 10208966 DOI: 10.1095/biolreprod60.5.1069] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The pregnancy-associated glycoproteins (PAGs) are placental antigens that were initially characterized as pregnancy markers in the maternal circulation of domestic ruminant species. They are members of the aspartic proteinase gene family, having greatest sequence identity with pepsinogens. However, some are not capable of functioning as enzymes. The PAGs are associated with a large gene family within the Artiodactyla order (cattle, camels, pigs). So far, no members of this family have been characterized in species outside this order. This report describes the cloning and initial characterization of a PAG-like protein (equine PAG or ePAG) expressed in the placenta of the horse and zebra (order Perrisodactyla). Equine PAG is a proteinase capable of degrading 14C-hemoglobin and catalyzing the removal of its own pro-peptide. The ePAG mRNA is restricted to the chorion both prior to implantation and in the term placenta. Equine PAG is secreted from cultured placental tissue as both a processed (mature) and unprocessed (zymogen) form. Equine PAG shares similar identity with the PAGs and pepsinogens and probably arose from a pepsinogen-like precursor that gained the ability to be expressed in the placenta. The promoter of the ePAG gene shares sequence identity with the promoter from a bovine PAG gene but not with promoters of other aspartic proteinases. Therefore, we hypothesize that ePAG is a remnant of the pepsinogen-like progenitor gene that was expanded within the Artiodactyla to create the large and highly diverse PAG family.
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Affiliation(s)
- J A Green
- Department of Biochemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA
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42
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Gan X, Zhang L, Berger O, Stins MF, Way D, Taub DD, Chang SL, Kim KS, House SD, Weinand M, Witte M, Graves MC, Fiala M. Cocaine enhances brain endothelial adhesion molecules and leukocyte migration. Clin Immunol 1999; 91:68-76. [PMID: 10219256 DOI: 10.1006/clim.1998.4683] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Leukocyte infiltration of cerebral vessels in cocaine-associated vasculopathy suggests that cocaine may enhance leukocyte migration. We have investigated cocaine's effects on leukocyte adhesion in human brain microvascular endothelial cell (BMVEC) cultures and monocyte migration in an in vitro blood-brain barrier (BBB) model constructed with BMVEC and astrocytes. Cocaine (10(-5) to 10(-9) M) enhanced adhesion of monocytes and neutrophils to BMVEC. In the BBB model, cocaine (10(-4) to 10(-8) M) enhanced monocyte transmigration. Cocaine increased expression of endothelial adhesion molecules, intercellular adhesion molecule-1 (ICAM-1, CD54), vascular cell adhesion molecule-1 (VCAM-1), and endothelial leukocyte adhesion molecule-1 (ELAM-1) on BMVEC. The peak effect on ICAM-1 expression was between 6 and 18 h after treatment. ICAM-1 was increased by cocaine in BMVEC, but not in human umbilical vein endothelial cells, and the enhancement was greater in a coculture of BMVEC with monocytes. ICAM-1 expression was enhanced by a transcriptional mechanism. Polymyxin B inhibited up-regulation of adhesion molecules by LPS but not by cocaine. In LPS-activated BMVEC/monocyte coculture, cocaine increased secretion of tumor necrosis factor-alpha and interleukin-6. Taken together, these findings indicate that cocaine enhances leukocyte migration across the cerebral vessel wall, in particular under inflammatory conditions, but the effects are variable in different individuals. Cocaine's effects are exerted through a cascade of augmented expression of inflammatory cytokines and endothelial adhesion molecules. These could underlie the cerebrovascular complications of cocaine abuse.
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Affiliation(s)
- X Gan
- Department of Neurology, UCLA School of Medicine 90095-1769, USA
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Yi Y, Gan X, Lin C, Hu X. [Expression and significance of Fas/APO-1 and Bcl-2 protein in human lung cancer.]. Zhongguo Fei Ai Za Zhi 1999; 2:17-9. [PMID: 20880468 DOI: 10.3779/j.issn.1009-3419.1999.01.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To investigate the role of Fas/APO-1 and Bcl-2 in oncogenesis and progression of lung cancer. METHODS The expression of Fas/APO-1 and Bcl-2 protein were detected in 65 lung cancer tissues and 46 normal lung tissues by immunohistochemistry. RESULTS The positive rate of Fas/APO-1 protein expression in lung cancer tissues was 56. 92 % , which was significantly lower than that in normal lung tissues (82. 61 %) ( P < 0. 01) . The positive rate of Bcl-2 protein expression was 46. 15 %. It was significantly higher than that in normal lung tissues (6. 52 %) ( P < 0. 01) . CONCLUSIONS Both Fas/APO-1 and Bcl-2 may play an role in the oncogenesis and progression of lung cancer.
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Affiliation(s)
- Y Yi
- Department of Thoracocardiac Surgery , 175th Hospital of People's Liberation Army , Zhangzhou , Fujian 363000 , P. R. China
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44
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Xie Y, Tan D, Gan X. [Detection of the level of serum IgG antibody to hepatitis E virus]. Hunan Yi Ke Da Xue Xue Bao 1998; 22:223-5. [PMID: 9868119] [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: 02/09/2023]
Abstract
The levels of serum IgG antibody to hepatitis E virus (anti-HEV-IgG) was detected in serum specimens from 50 patients with acute sporadic hepatitis E and 20 healthy donors who were positive for anti-HEV-IgG by ELISA titration. The results showed that the level of anti-HEV-IgG in acute hepatitis E patients was significantly higher than that in healthy donors and the average titer is 1:121 and 1:22, respectively (P < 0.01). So acute viral hepatitis E should be diagnozed when the titer of anti-HEV-IgG was over 1:40.
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Affiliation(s)
- Y Xie
- Department of Infectious Disease, Xiangya Hospital, Hunan Medical University, Changsha
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45
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Gan X, Zhang L, Newton T, Chang SL, Ling W, Kermani V, Berger O, Graves MC, Fiala M. Cocaine infusion increases interferon-gamma and decreases interleukin-10 in cocaine-dependent subjects. Clin Immunol Immunopathol 1998; 89:181-90. [PMID: 9787120 DOI: 10.1006/clin.1998.4607] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The effects of cocaine infusion (40 mg) on interferon-gamma (IFN-gamma) and interleukin-10 (IL-10) cytokine secretion were examined in 15 cocaine-dependent subjects. Pre- and postcocaine infusion peripheral blood mononuclear cells (PBMC), stimulated with phytohemagglutinin A, were cultured for 48 h and the cytokines in the supernatant measured by enzyme-linked immunosorbent assay. Cocaine infusion, but not saline infusion, increased IFN-gamma secretion and decreased IL-10 secretion, while, in PBMC collected simultaneously from control subjects, secretion of these cytokines was unaltered. Baseline IFN-gamma levels were lower and IL-10 levels higher in addicted subjects compared to those in control subjects. White blood cell and lymphocyte number and CD4(+) and CD8(+) counts were all increased following cocaine infusion. In vitro cocaine treatment of PBMC from addicted subjects suppressed both IL-10 and IFN-gamma secretion. These data suggest that acute cocaine administration, via both central and peripheral effects, may enhance Th1-type immune responses and inhibit Th2-type responses.
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Affiliation(s)
- X Gan
- Department of Medicine, UCLA School of Medicine, Los Angeles, California, 90095-1769, USA
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Back SA, Gan X, Li Y, Rosenberg PA, Volpe JJ. Maturation-dependent vulnerability of oligodendrocytes to oxidative stress-induced death caused by glutathione depletion. J Neurosci 1998; 18:6241-53. [PMID: 9698317 PMCID: PMC6793198] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Death of oligodendrocyte (OL) precursors can be triggered in vitro by cystine deprivation, a form of oxidative stress that involves depletion of intracellular glutathione. We report here that OLs demonstrate maturation-dependent differences in survival when subjected to free radical-mediated injury induced by glutathione depletion. Using immunopanning to isolate rat preoligodendrocytes (preOLs), we generated highly enriched populations of preOLs and mature OLs under chemically defined conditions. Cystine deprivation caused a similar decrease in glutathione levels in OLs at both stages. However, preOLs were completely killed by cystine deprivation, whereas mature OLs remained viable. Although the glutathione-depleting agents buthionine sulfoximine and diethylmaleate were more potent in depleting glutathione in mature OLs, both agents were significantly more toxic to preOLs. Glutathione depletion markedly increased intracellular free radical generation in preOLs, but not in mature OLs, as indicated by oxidation of the redox-sensitive probe dihydrorhodamine 123. The antioxidants alpha-tocopherol, idebenone, and glutathione monoethylester prevented the oxidation of dihydrorhodamine in cystine-depleted preOLs and markedly protected against cell death. When the intracellular glutathione level was not manipulated, preOLs were also more vulnerable than mature OLs to exogenous free radical toxicity generated by a xanthine-xanthine oxidase system. Ultrastructural features of free radical-mediated injury in glutathione-depleted preOLs included nuclear condensation, margination of chromatin, and mitochondrial swelling. These observations indicate that preOLs are significantly more sensitive to the toxic effects of glutathione depletion and that oligodendroglial maturation is associated with decreased susceptibility to oxidative stress.
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Affiliation(s)
- S A Back
- Department of Neurology, Children's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
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Fiala M, Zhang L, Gan X, Sherry B, Taub D, Graves MC, Hama S, Way D, Weinand M, Witte M, Lorton D, Kuo YM, Roher AE. Amyloid-beta induces chemokine secretion and monocyte migration across a human blood--brain barrier model. Mol Med 1998; 4:480-9. [PMID: 9713826 PMCID: PMC2230332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Aside from numerous parenchymal and vascular deposits of amyloid beta (A beta) peptide, neurofibrillary tangles, and neuronal and synaptic loss, the neuropathology of Alzheimer's disease is accompanied by a subtle and chronic inflammatory reaction that manifests itself as microglial activation. However, in Alzheimer's disease, alterations in the permeability of the blood-brain barrier and chemotaxis, in part mediated by chemokines and cytokines, may permit the recruitment and transendothelial passage of peripheral cells into the brain parenchyma. MATERIALS AND METHODS Human monocytes from different donors were tested for their capacity to differentiate into macrophages and their ability to secrete cytokines and chemokines in the presence of A beta 1-42. A paradigm of the blood-brain barrier was constructed utilizing human brain endothelial and astroglial cells with the anatomical and physiological characteristics observed in vivo. This model was used to test the ability of monocytes/macrophages to transmigrate when challenged by A beta 1-42 on the brain side of the blood-brain barrier model. RESULTS In cultures of peripheral monocytes, A beta 1-42 induced the secretion of proinflammatory cytokines TNF-alpha, IL-6, IL-1 beta, and IL-12, as well as CC chemokines MCP-1, MIP-1 alpha, and MIP-1 beta, and CXC chemokine IL-8 in a dose-related fashion. In the blood-brain barrier model, A beta 1-42 and monocytes on the brain side potentiated monocyte transmigration from the blood side to the brain side. A beta 1-42 stimulated differentiation of monocytes into adherent macrophages in a dose-related fashion. The magnitude of these proinflammatory effects of A beta 1-42 varied dramatically with monocytes from different donors. CONCLUSION In some individuals, circulating monocytes/macrophages, when recruited by chemokines produced by activated microglia and macrophages, could add to the inflammatory destruction of the brain in Alzheimer's disease.
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Affiliation(s)
- M Fiala
- Department of Medicine, UCLA School of Medicine, Los Angeles, California, USA.
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48
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Gan X, Zhou Y, Cai L. [Prognosis of laryngeal carcinoma in youth]. Zhonghua Er Bi Yan Hou Ke Za Zhi 1998; 31:201-2. [PMID: 9642341] [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: 02/07/2023]
Abstract
The prognosis of 55 cases of laryngeal carcinoma in young people had been studied. The major factors mainly related to prognosis were smoking and misdiagnosis, while the tumour differentiation might be not so important. There was a high recurrence rate of 25.5% in the young patients and low 3- and 5-year survival rates of 47.4% and 34.5% respectively. The mortality of 1-year after surgery was 21.8%. The 3-and 5-year survival rates between total and partial laryngectomy made no difference. The survival rate of patients with positive node was lower. Early diagnosis is most important for young patients. Partial laryngectomy and neck dissection must be performed as far as possible.
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Affiliation(s)
- X Gan
- 463th Hospital of PLA, Shenyang
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49
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Abstract
This manuscript describes the cloning of a novel aspartic proteinase expressed in the placenta of the horse (order Perrisodactyla). Evidence for similar genes in the cat (Carnivora) and ruminants (Artiodactyla), indicates that these molecules have been conserved within widely divergent species with distinct types of placentation. Since ePAG is produced by the outer cell layer (trophoblast) of the placenta, it can tentatively be grouped with the pregnancy-associated glycoproteins (PAG) of cattle, sheep, and pig. The high sequence identity that ePAG shares with pepsinogens as well as the PAG, indicates that ePAG may be the evolutionary bridge that links these two groups of aspartic proteinases.
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Affiliation(s)
- J Green
- Department of Animal Sciences, University of Missouri, Columbia 65211, USA
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50
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Xu S, Tang F, Shi L, Gan X, Shi Y, Cheng L, Li J, Dong Y. Anti-Sa antibody in Chinese rheumatoid arthritis. Chin Med J (Engl) 1998; 111:204-7. [PMID: 10374415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
OBJECTIVE To test anti-Sa antibody in different autoimmune connective tissue diseases and analyze the relationship between Sa antibody and clinical manifestations and laboratory tests in rheumatoid arthritis. METHOD Sa antigen was extracted from human placenta. Anti-Sa antibody was tested in 40 normal people and 478 connective tissue disease (CTD) patients using Western Blotting (WB). RESULTS Sa antigen was a protein with molecular weights of 50 kD and 55 kD. Anti-Sa antibody was positive in 31.9% (61/191) rheumatoid arthritis (RA), 3.0% (2/67) Sjögren's syndrome (SS), 4.3% (2/46) systemic lupus erythmatosus (SLE) and 0% (0/66) Behcet's disease, 0% (0/60) polymyositis/dermatomyositis (PM/DM), 0% (0/66) other CTD and 0% (0/40) normal controls. Anti-Sa antibody was different from other auto-antibodies in RA. In rheumatoid arthritis its sensitivity, specificity, positive prediction rate, negative prediction rate were 31.9%, 98.6%, 93.8% and 68.5% respectively. Anti-Sa antibody positive patients were significantly different from anti-Sa antibody negative patients in moming stiffness, ESR, ANA and X-ray grade. CONCLUSION Anti-Sa antibody was a new auto-antibody for the diagnosis of RA. Anti-Sa antibody positive patients seem to have more serious inflammation and more advanced disease process.
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Affiliation(s)
- S Xu
- Chinese Institute of Medical Science, Peking Union Medical College, Department of Rheumatology and Immunology, PUMC Hospital, Beijing, China
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